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Revision 1.132: download - view: text, markup, annotated - select for diffs
Mon Oct 28 20:36:53 2024 UTC (5 weeks ago) by adam
Branches: MAIN
CVS tags: HEAD
Diff to: previous 1.131: preferred, colored
Changes since revision 1.131: +4 -4 lines
tor: updated to 0.4.8.13

Changes in version 0.4.8.13 - 2024-10-24

This is minor release fixing an important client circuit building (Conflux
related) bug which lead to performance degradation and extra load on the
network. Some minor memory leaks fixes as well as an important minor feature
for pluggable transports. We strongly recommend to update as soon as possible
for clients in order to neutralize this conflux bug.

o Major bugfixes (circuit building):
  - Conflux circuit building was ignoring the "predicted ports"
    feature, which aims to make Tor stop building circuits if there
    have been no user requests lately. This bug led to every idle Tor
    on the network building and discarding circuits every 30 seconds,
    which added overall load to the network, used bandwidth and
    battery from clients that weren't actively using their Tor, and
    kept sockets open on guards which added connection padding
    essentially forever. Fixes bug 40981; bugfix on 0.4.8.1-alpha;

o Minor feature (bridges, pluggable transport):
  - Add STATUS TYPE=version handler for Pluggable Transport. This
    allows us to gather version statistics on Pluggable Transport
    usage from bridge servers on our metrics portal. Closes
    ticket 11101.

o Minor features (fallbackdir):
  - Regenerate fallback directories generated on October 24, 2024.

o Minor features (geoip data):
  - Update the geoip files to match the IPFire Location Database, as
    retrieved on 2024/10/24.

o Minor bugfixes (memleak, authority):
  - Fix a small memleak when computing a new consensus. This only
    affects directory authorities. Fixes bug 40966; bugfix
    on 0.3.5.1-alpha.

o Minor bugfixes (memory):
  - Fix memory leaks of the CPU worker code during shutdown. Fixes bug
    833; bugfix on 0.3.5.1-alpha.

Revision 1.131: download - view: text, markup, annotated - select for diffs
Tue Jun 18 10:36:58 2024 UTC (5 months, 2 weeks ago) by adam
Branches: MAIN
CVS tags: pkgsrc-2024Q3-base, pkgsrc-2024Q3, pkgsrc-2024Q2-base, pkgsrc-2024Q2
Diff to: previous 1.130: preferred, colored
Changes since revision 1.130: +4 -4 lines
tor: updated to 0.4.8.12

Changes in version 0.4.8.12 - 2024-06-06

This is a minor release with couple bugfixes affecting conflux and logging.
We also have the return of faravahar directory authority with new keys and
address.

o Minor feature (dirauth):
  - Add back faravahar with a new address and new keys. Closes 40689.

o Minor features (fallbackdir):
  - Regenerate fallback directories generated on June 06, 2024.

o Minor features (geoip data):
  - Update the geoip files to match the IPFire Location Database, as
    retrieved on 2024/06/06.

o Minor bugfix (circuit):
  - Remove a log_warn being triggered by a protocol violation that
    already emits a protocol warning log. Fixes bug 40932; bugfix
    on 0.4.8.1-alpha.

o Minor bugfixes (conflux):
  - Avoid a potential hard assert (crash) when sending a cell on a
    Conflux set. Fixes bug 40921; bugfix on 0.4.8.1-alpha.
  - Make sure we don't process a closed circuit when packaging data.
    This lead to a non fatal BUG() spamming logs. Fixes bug 40908;
    bugfix on 0.4.8.1-alpha.

Revision 1.130: download - view: text, markup, annotated - select for diffs
Sun Apr 14 05:57:25 2024 UTC (7 months, 2 weeks ago) by adam
Branches: MAIN
Diff to: previous 1.129: preferred, colored
Changes since revision 1.129: +4 -4 lines
tor: updated to 0.4.8.11

Changes in version 0.4.8.11 - 2024-04-10
  This is a minor release mostly to upgrade the fallbackdir list. Worth noting
  also that directory authority running this version will now automatically
  reject relays running the end of life 0.4.7.x version.

  o Minor feature (authority):
    - Reject 0.4.7.x series at the authority level. Closes ticket 40896.

  o Minor feature (dirauth, tor26):
    - New IP address and keys.

  o Minor feature (directory authority):
    - Allow BandwidthFiles "node_id" KeyValue without the dollar sign at
      the start of the hexdigit, in order to easier database queries
      combining Tor documents in which the relays fingerprint does not
      include it. Fixes bug 40891; bugfix on 0.4.7 (all supported
      versions of Tor).

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on April 10, 2024.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2024/04/10.

  o Minor bugfixes (directory authorities):
    - Add a warning when publishing a vote or signatures to another
      directory authority fails. Fixes bug 40910; bugfix
      on 0.2.0.3-alpha.

Revision 1.129: download - view: text, markup, annotated - select for diffs
Tue Jan 16 06:21:58 2024 UTC (10 months, 2 weeks ago) by adam
Branches: MAIN
CVS tags: pkgsrc-2024Q1-base, pkgsrc-2024Q1
Diff to: previous 1.128: preferred, colored
Changes since revision 1.128: +4 -4 lines
tor: updated to 0.4.8.10

Changes in version 0.4.8.10 - 2023-12-08
  This is a security release fixing a high severity bug (TROVE-2023-007)
  affecting Exit relays supporting Conflux. We strongly recommend to update as
  soon as possible.

  o Major bugfixes (TROVE-2023-007, exit):
    - Improper error propagation from a safety check in conflux leg
      linking lead to a desynchronization of which legs were part of a
      conflux set, ultimately causing a UAF and NULL pointer dereference
      crash on Exit relays. Fixes bug 40897; bugfix on 0.4.8.1-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on December 08, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/12/08.

  o Minor bugfixes (bridges, statistics):
    - Correctly report statistics for client count over Pluggable
      transport. Fixes bug 40871; bugfix on 0.4.8.4

Revision 1.128: download - view: text, markup, annotated - select for diffs
Fri Nov 10 08:06:47 2023 UTC (12 months, 3 weeks ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2023Q4-base, pkgsrc-2023Q4
Diff to: previous 1.127: preferred, colored
Changes since revision 1.127: +4 -4 lines
tor: update to 0.4.8.9.

Changes in version 0.4.8.9 - 2023-11-09
  This is another security release fixing a high severity bug affecting onion
  services which is tracked by TROVE-2023-006. We are also releasing a guard
  major bugfix as well. If you are an onion service operator, we strongly
  recommend to update as soon as possible.

  o Major bugfixes (guard usage):
    - When Tor excluded a guard due to temporary circuit restrictions,
      it considered *additional* primary guards for potential usage by
      that circuit. This could result in more than the specified number
      of guards (currently 2) being used, long-term, by the tor client.
      This could happen when a Guard was also selected as an Exit node,
      but it was exacerbated by the Conflux guard restrictions. Both
      instances have been fixed. Fixes bug 40876; bugfix
      on 0.3.0.1-alpha.

  o Major bugfixes (onion service, TROVE-2023-006):
    - Fix a possible hard assert on a NULL pointer when recording a
      failed rendezvous circuit on the service side for the MetricsPort.
      Fixes bug 40883; bugfix on 0.4.8.1-alpha

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on November 09, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/11/09.

Revision 1.127: download - view: text, markup, annotated - select for diffs
Thu Nov 9 07:56:37 2023 UTC (12 months, 3 weeks ago) by wiz
Branches: MAIN
Diff to: previous 1.126: preferred, colored
Changes since revision 1.126: +4 -5 lines
tor: update to 0.4.8.8.

Changes in version 0.4.8.8 - 2023-11-03
  We are releasing today a fix for a high security issue, TROVE-2023-004, that
  is affecting relays. Also a few minor bugfixes detailed below. Please upgrade
  as soon as posssible.

  o Major bugfixes (TROVE-2023-004, relay):
    - Mitigate an issue when Tor compiled with OpenSSL can crash during
      handshake with a remote relay. Fixes bug 40874; bugfix
      on 0.2.7.2-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on November 03, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/11/03.

  o Minor bugfixes (directory authority):
    - Look at the network parameter "maxunmeasuredbw" with the correct
      spelling. Fixes bug 40869; bugfix on 0.4.6.1-alpha.

  o Minor bugfixes (vanguards addon support):
    - Count the conflux linked cell as valid when it is successfully
      processed. This will quiet a spurious warn in the vanguards addon.
      Fixes bug 40878; bugfix on 0.4.8.1-alpha.


Changes in version 0.4.8.7 - 2023-09-25
  This version fixes a single major bug in the Conflux subsystem on the client
  side. See below for more information. The upcoming Tor Browser 13 stable will
  pick this up.

  o Major bugfixes (conflux):
    - Fix an issue that prevented us from pre-building more conflux sets
      after existing sets had been used. Fixes bug 40862; bugfix
      on 0.4.8.1-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on September 25, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/09/25.


Changes in version 0.4.8.6 - 2023-09-18
  This version contains an important fix for onion service regarding congestion
  control and its reliability. Apart from that, uneeded BUG warnings have been
  suppressed especially about a compression bomb seen on relays. We strongly
  recommend, in particular onion service operators, to upgrade as soon as
  possible to this latest stable.

  o Major bugfixes (onion service):
    - Fix a reliability issue where services were expiring their
      introduction points every consensus update. This caused
      connectivity issues for clients caching the old descriptor and
      intro points. Bug reported and fixed by gitlab user
      @hyunsoo.kim676. Fixes bug 40858; bugfix on 0.4.7.5-alpha.

  o Minor features (debugging, compression):
    - Log the input and output buffer sizes when we detect a potential
      compression bomb. Diagnostic for ticket 40739.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on September 18, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/09/18.

  o Minor bugfix (defensive programming):
    - Disable multiple BUG warnings of a missing relay identity key when
      starting an instance of Tor compiled without relay support. Fixes
      bug 40848; bugfix on 0.4.3.1-alpha.

  o Minor bugfixes (bridge authority):
    - When reporting a pseudo-networkstatus as a bridge authority, or
      answering "ns/purpose/*" controller requests, include accurate
      published-on dates from our list of router descriptors. Fixes bug
      40855; bugfix on 0.4.8.1-alpha.

  o Minor bugfixes (compression, zstd):
    - Use less frightening language and lower the log-level of our run-
      time ABI compatibility check message in our Zstd compression
      subsystem. Fixes bug 40815; bugfix on 0.4.3.1-alpha.


Changes in version 0.4.8.5 - 2023-08-30
  Quick second release after the first stable few days ago fixing minor
  annoying bugfixes creating log BUG stacktrace. We also fix BSD compilation
  failures and PoW unit test.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on August 30, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/08/30.

  o Minor bugfix (NetBSD, compilation):
    - Fix compilation issue on NetBSD by avoiding an unnecessary
      dependency on "huge" page mappings in Equi-X. Fixes bug 40843;
      bugfix on 0.4.8.1-alpha.

  o Minor bugfix (NetBSD, testing):
    - Fix test failures in "crypto/hashx" and "slow/crypto/equix" on
      x86_64 and aarch64 NetBSD hosts, by adding support for
      PROT_MPROTECT() flags. Fixes bug 40844; bugfix on 0.4.8.1-alpha.

  o Minor bugfixes (conflux):
    - Demote a relay-side warn about too many legs to ProtocolWarn, as
      there are conditions that it can briefly happen during set
      construction. Also add additional set logging details for all
      error cases. Fixes bug 40841; bugfix on 0.4.8.1-alpha.
    - Prevent non-fatal assert stacktrace caused by using conflux sets
      during their teardown process. Fixes bug 40842; bugfix
      on 0.4.8.1-alpha.

Revision 1.126: download - view: text, markup, annotated - select for diffs
Thu Aug 24 18:56:42 2023 UTC (15 months, 1 week ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2023Q3-base, pkgsrc-2023Q3
Diff to: previous 1.125: preferred, colored
Changes since revision 1.125: +5 -4 lines
tor: update to 0.4.8.4.

Changes in version 0.4.8.4 - 2023-08-23
  Finally, this is the very first stable release of the 0.4.8.x series making
  Proof-of-Work (prop#327) and Conflux (prop#329) available to the entire
  network. Some major bugfixes since the release candidate detailed below.

  o Major feature (denial of service):
    - Extend DoS protection to partially opened channels and known
      relays. Because re-entry is not allowed anymore, we can apply DoS
      protections onto known IP namely relays. Fixes bug 40821; bugfix
      on 0.3.5.1-alpha.

  o Major bugfixes (conflux):
    - Fix a relay-side crash caused by side effects of the fix for bug
      40827. Reverts part of that fix that caused the crash and adds
      additional log messages to help find the root cause. Fixes bug
      40834; bugfix on 0.4.8.3-rc.

  o Major bugfixes (proof of work, onion service, hashx):
    - Fix a very rare buffer overflow in hashx, specific to the dynamic
      compiler on aarch64 platforms. Fixes bug 40833; bugfix
      on 0.4.8.2-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on August 23, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/08/23.

  o Minor features (testing):
    - All Rust code is now linted (cargo clippy) as part of GitLab CI, and
      existing warnings have been fixed. - Any unit tests written in Rust now
      run as part of GitLab CI.

  o Minor bugfix (FreeBSD, compilation):
    - Fix compilation issue on FreeBSD by properly importing
      sys/param.h. Fixes bug 40825; bugfix on 0.4.8.1-alpha.

  o Minor bugfixes (compression):
    - Right after compression/decompression work is done, check for
      errors. Before this, we would consider compression bomb before
      that and then looking for errors leading to false positive on that
      log warning. Fixes bug 40739; bugfix on 0.3.5.1-alpha. Patch
      by "cypherpunks".


Changes in version 0.4.8.3-rc - 2023-08-04
  This is the first release candidate (and likely the only) of the 0.4.8.x
  series. We fixed a major conflux bugfix which was a fatal asserts on the
  relay Exit side. See below for more details. Couple minor bugfixes. Until
  stable, name of the game here is stabilization.

  o Major bugfixes (conflux):
    - Fix a relay-side assert crash caused by attempts to use a conflux
      circuit between circuit close and free, such that no legs were on
      the conflux set. Fixed by nulling out the stream's circuit back-
      pointer when the last leg is removed. Additional checks and log
      messages have been added to detect other cases. Fixes bug 40827;
      bugfix on 0.4.8.1-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on August 04, 2023.
    - Regenerate fallback directories generated on July 26, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/07/26.
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/08/04.

  o Minor bugfixes (compilation):
    - Fix all -Werror=enum-int-mismatch warnings. No behavior change.
      Fixes bug 40824; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (protocol warn):
    - Wrap a handful of cases where ProtocolWarning logs could emit IP
      addresses. Fixes bug 40828; bugfix on 0.3.5.1-alpha.


Changes in version 0.4.8.2-alpha - 2023-07-12
  This is our second alpha containing some minor bugfixes and one major bugfix
  about L2 vanguard rotation. We believe this will be the last alpha before the
  rc in a couple of weeks.

  o Major bugfixes (vanguards):
    - Rotate to a new L2 vanguard whenever an existing one loses the
      Stable or Fast flag. Previously, we would leave these relays in
      the L2 vanguard list but never use them, and if all of our
      vanguards end up like this we wouldn't have any middle nodes left
      to choose from so we would fail to make onion-related circuits.
      Fixes bug 40805; bugfix on 0.4.7.1-alpha.

  o Minor feature (hs):
    - Fix compiler warnings in equix and hashx when building with clang.
      Closes ticket 40800.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on July 12, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/07/12.

  o Minor bugfix (congestion control):
    - Reduce the accepted range of a circuit's negotiated 'cc_sendme_inc'
      to be +/- 1 from the consensus parameter value. Fixes bug 40569;
      bugfix on 0.4.7.4-alpha.
    - Remove unused congestion control algorithms and BDP calculation
      code, now that we have settled on and fully tuned Vegas. Fixes bug
      40566; bugfix on 0.4.7.4-alpha.
    - Update default congestion control parameters to match consensus.
      Fixes bug 40709; bugfix on 0.4.7.4-alpha.

  o Minor bugfixes (compilation):
    - Fix "initializer is not a constant" compilation error that
      manifests itself on gcc versions < 8.1 and MSVC. Fixes bug 40773;
      bugfix on 0.4.8.1-alpha

  o Minor bugfixes (conflux):
    - Count leg launch attempts prior to attempting to launch them. This
      avoids inifinite launch attempts due to internal circuit building
      failures. Additionally, double-check that we have enough exits in
      our consensus overall, before attempting to launch conflux sets.
      Fixes bug 40811; bugfix on 0.4.8.1-alpha.
    - Fix a case where we were resuming reading on edge connections that
      were already marked for close. Fixes bug 40801; bugfix
      on 0.4.8.1-alpha.
    - Fix stream attachment order when creating conflux circuits, so
      that stream attachment happens after finishing the full link
      handshake, rather than upon set finalization. Fixes bug 40801;
      bugfix on 0.4.8.1-alpha.
    - Handle legs being closed or destroyed before computing an RTT
      (resulting in warns about too many legs). Fixes bug 40810; bugfix
      on 0.4.8.1-alpha.
    - Remove a "BUG" warning from conflux_pick_first_leg that can be
      triggered by broken or malicious clients. Fixes bug 40801; bugfix
      on 0.4.8.1-alpha.

  o Minor bugfixes (KIST):
    - Prevent KISTSchedRunInterval from having values of 0 or 1, neither
      of which work properly. Additionally, make a separate
      KISTSchedRunIntervalClient parameter, so that the client and relay
      KIST values can be set separately. Set the default of both to 2ms.
      Fixes bug 40808; bugfix on 0.3.2.1-alpha.


Changes in version 0.4.8.1-alpha - 2023-06-01
  This is the first alpha of the 0.4.8.x series. Two major features in this
  version which are Conflux and onion service Proof-of-Work (PoW). There are
  also many small features in particular, worth noting, the MetricsPort is now
  exporting more relay and onion service metrics. Finally, there are
  also numerous minor bugfixes included in this version.

  o Major features (onion service, proof-of-work):
    - Implement proposal 327 (Proof-Of-Work). This is aimed at thwarting
      introduction flooding DoS attacks by introducing a dynamic Proof-Of-Work
      protocol that occurs over introduction circuits. This introduces several
      torrc options prefixed with "HiddenServicePoW" in order to control this
      feature. By default, this is disabled. Closes ticket 40634.

  o Major features (conflux):
    - Implement Proposal 329 (conflux traffic splitting). Conflux splits
      traffic across two circuits to Exits that support the protocol.
      These circuits are pre-built only, which means that if the pre-
      built conflux pool runs out, regular circuits will then be used.
      When using conflux circuit pairs, clients choose the lower-latency
      circuit to send data to the Exit. When the Exit sends data to the
      client, it maximizes throughput, by fully utilizing both circuits
      in a multiplexed fashion. Alternatively, clients can request that
      the Exit optimize for latency when transmitting to them, by
      setting the torrc option 'ConfluxClientUX latency'. Onion services
      are not currently supported, but will be in arti. Many other
      future optimizations will also be possible using this protocol.
      Closes ticket 40593.

  o Major features (dirauth):
    - Directory authorities and relays now interact properly with
      directory authorities if they change addresses. In the past, they
      would continue to upload votes, signatures, descriptors, etc to
      the hard-coded address in the configuration. Now, if the directory
      authority is listed in the consensus at a different address, they
      will direct queries to this new address. Implements ticket 40705.

  o Minor feature (CI):
    - Update CI to use Debian Bullseye for runners.

  o Minor feature (client, IPv6):
    - Make client able to pick IPv6 relays by default now meaning
      ClientUseIPv6 option now defaults to 1. Closes ticket 40785.

  o Minor feature (compilation):
    - Fix returning something other than "Unknown N/A" as libc version
      if we build tor on an O.S. like DragonFlyBSD, FreeBSD, OpenBSD
      or NetBSD.

  o Minor feature (cpuworker):
    - Always use the number of threads for our CPU worker pool to the
      number of core available but cap it to a minimum of 2 in case of a
      single core. Fixes bug 40713; bugfix on 0.3.5.1-alpha.

  o Minor feature (lzma):
    - Fix compiler warnings for liblzma >= 5.3.1. Closes ticket 40741.

  o Minor feature (MetricsPort, relay):
    - Expose time until online keys expires on the MetricsPort. Closes
      ticket 40546.

  o Minor feature (MetricsPort, relay, onion service):
    - Add metrics for the relay side onion service interactions counting
      seen cells. Closes ticket 40797. Patch by "friendly73".

  o Minor features (directory authorities):
    - Directory authorities now include their AuthDirMaxServersPerAddr
      config option in the consensus parameter section of their vote.
      Now external tools can better predict how they will behave.
      Implements ticket 40753.

  o Minor features (directory authority):
    - Add a new consensus method in which the "published" times on
      router entries in a microdesc consensus are all set to a
      meaningless fixed date. Doing this will make the download size for
      compressed microdesc consensus diffs much smaller. Part of ticket
      40130; implements proposal 275.

  o Minor features (network documents):
    - Clients and relays no longer track the "published on" time
      declared for relays in any consensus documents. When reporting
      this time on the control port, they instead report a fixed date in
      the future. Part of ticket 40130.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on June 01, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/06/01.

  o Minor features (hs, metrics):
    - Add tor_hs_rend_circ_build_time and tor_hs_intro_circ_build_time
      histograms to measure hidden service rend/intro circuit build time
      durations. Part of ticket 40757.

  o Minor features (metrics):
    - Add a `reason` label to the HS error metrics. Closes ticket 40758.
    - Add service side metrics for REND and introduction request
      failures. Closes ticket 40755.
    - Add support for histograms. Part of ticket 40757.

  o Minor features (pluggable transports):
    - Automatically restart managed Pluggable Transport processes when
      their process terminate. Resolves ticket 33669.

  o Minor features (portability, compilation):
    - Use OpenSSL 1.1 APIs for LibreSSL, fixing LibreSSL 3.5
      compatibility. Fixes issue 40630; patch by Alex Xu (Hello71).

  o Minor features (relay):
    - Do not warn about configuration options that may expose a non-
      anonymous onion service. Closes ticket 40691.

  o Minor features (relays):
    - Trigger OOS when bind fails with EADDRINUSE. This improves
      fairness when a large number of exit connections are requested,
      and properly signals exhaustion to the network. Fixes issue 40597;
      patch by Alex Xu (Hello71).

  o Minor features (tests):
    - Avoid needless key reinitialization with OpenSSL during unit
      tests, saving significant time. Patch from Alex Xu.

  o Minor bugfix (relay, logging):
    - The wrong max queue cell size was used in a protocol warning
      logging statement. Fixes bug 40745; bugfix on 0.4.7.1-alpha.

  o Minor bugfixes (logging):
    - Avoid ""double-quoting"" strings in several log messages. Fixes
      bug 22723; bugfix on 0.1.2.2-alpha.
    - Correct a log message when cleaning microdescriptors. Fixes bug
      40619; bugfix on 0.2.5.4-alpha.

  o Minor bugfixes (metrics):
    - Decrement hs_intro_established_count on introduction circuit
      close. Fixes bug 40751; bugfix on 0.4.7.12.

  o Minor bugfixes (pluggable transports, windows):
    - Remove a warning `BUG()` that could occur when attempting to
      execute a non-existing pluggable transport on Windows. Fixes bug
      40596; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (relay):
    - Remove a "BUG" warning for an acceptable race between a circuit
      close and considering that circuit active. Fixes bug 40647; bugfix
      on 0.3.5.1-alpha.
    - Remove a harmless "Bug" log message that can happen in
      relay_addr_learn_from_dirauth() on relays during startup. Finishes
      fixing bug 40231. Fixes bug 40523; bugfix on 0.4.5.4-rc.

  o Minor bugfixes (sandbox):
    - Allow membarrier for the sandbox. And allow rt_sigprocmask when
      compiled with LTTng. Fixes bug 40799; bugfix on 0.3.5.1-alpha.
    - Fix sandbox support on AArch64 systems. More "*at" variants of
      syscalls are now supported. Signed 32 bit syscall parameters are
      checked more precisely, which should lead to lower likelihood of
      breakages with future compiler and libc releases. Fixes bug 40599;
      bugfix on 0.4.4.3-alpha.

  o Minor bugfixes (state file):
    - Avoid a segfault if the state file doesn't contains TotalBuildTimes
      along CircuitBuildAbandonedCount being above 0. Fixes bug 40437;
      bugfix on 0.3.5.1-alpha.

  o Removed features:
    - Remove the RendPostPeriod option. This was primarily used in
      Version 2 Onion Services and after its deprecation isn't needed
      anymore. Closes ticket 40431. Patch by Neel Chauhan.

Revision 1.125: download - view: text, markup, annotated - select for diffs
Fri Jun 17 14:53:59 2022 UTC (2 years, 5 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2023Q2-base, pkgsrc-2023Q2, pkgsrc-2023Q1-base, pkgsrc-2023Q1, pkgsrc-2022Q4-base, pkgsrc-2022Q4, pkgsrc-2022Q3-base, pkgsrc-2022Q3, pkgsrc-2022Q2-base, pkgsrc-2022Q2
Diff to: previous 1.124: preferred, colored
Changes since revision 1.124: +4 -4 lines
tor: update to 0.4.7.8.

Changes in version 0.4.7.8 - 2022-06-17
  This version fixes several bugfixes including a High severity security issue
  categorized as a Denial of Service. Everyone running an earlier version
  should upgrade to this version.

  o Major bugfixes (congestion control, TROVE-2022-001):
    - Fix a scenario where RTT estimation can become wedged, seriously
      degrading congestion control performance on all circuits. This
      impacts clients, onion services, and relays, and can be triggered
      remotely by a malicious endpoint. Tracked as CVE-2022-33903. Fixes
      bug 40626; bugfix on 0.4.7.5-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on June 17, 2022.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2022/06/17.

  o Minor bugfixes (linux seccomp2 sandbox):
    - Allow the rseq system call in the sandbox. This solves a crash
      issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
      40601; bugfix on 0.3.5.11.

  o Minor bugfixes (logging):
    - Demote a harmless warn log message about finding a second hop to
      from warn level to info level, if we do not have enough
      descriptors yet. Leave it at notice level for other cases. Fixes
      bug 40603; bugfix on 0.4.7.1-alpha.
    - Demote a notice log message about "Unexpected path length" to info
      level. These cases seem to happen arbitrarily, and we likely will
      never find all of them before the switch to arti. Fixes bug 40612;
      bugfix on 0.4.7.5-alpha.

  o Minor bugfixes (relay, logging):
    - Demote a harmless XOFF log message to from notice level to info
      level. Fixes bug 40620; bugfix on 0.4.7.5-alpha.

Revision 1.124: download - view: text, markup, annotated - select for diffs
Wed Apr 27 21:02:18 2022 UTC (2 years, 7 months ago) by wiz
Branches: MAIN
Diff to: previous 1.123: preferred, colored
Changes since revision 1.123: +4 -4 lines
tor: update to 0.4.7.7.

Changes in version 0.4.7.7 - 2022-04-27
  This is the first stable version of the 0.4.7.x series. This series includes
  several major bugfixes from previous series and one massive new feature:
  congestion control.

  Congestion control should improve traffic speed and stability on the network
  once a majority of Exit upgrade. You can find more details about it in
  proposal 324 in the torspec.git repository.

  For a complete list of changes since 0.4.6.10, see the ReleaseNotes file.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on April 27, 2022.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2022/04/27.

  o Minor bugfixes (congestion control, client side logs):
    - Demote a warn about 1-hop circuits using congestion control down to
      info; Demote the 4-hop case to notice. Fixes bug 40598; bugfix on
      0.4.5-alpha.


Changes in version 0.4.7.6-rc - 2022-04-07
  This is the first release candidate of the 0.4.7.x series. Only one minor
  bugfix went in since the last alpha couple weeks ago. We strongly recommend
  anyone running an alpha version to upgrade to this version. Unless major
  problems are found, the next release will finally be the stable!

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on April 07, 2022.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2022/04/07.

  o Minor features (linux seccomp2 sandbox):
    - Permit the clone3 syscall, which is apparently used in glibc-2.34
      and later. Closes ticket 40590.


Changes in version 0.4.7.5-alpha - 2022-03-25
  This version contains, of what we hope, the final work for congestion
  control paving the way to the stable version. We expect this to be the last
  alpha version of the 0.4.7.x series. Mostly minor bugfixes except one major
  bugfix that changes how Tor behaves with DNS timeouts for Exit relays. As
  always with an alpha, we recommend all relay operators to upgrade from
  previous alpha to this one.

  o Major bugfixes (onion service, congestion control):
    - Fix the onion service upload case where the congestion control
      parameters were not added to the right object. Fixes bug 40586;
      bugfix on 0.4.7.4-alpha.

  o Major bugfixes (relay, DNS):
    - Lower the DNS timeout from 3 attempts at 5 seconds each to 2
      attempts at 1 seconds each. Two new consensus parameters were
      added to control these values. This change should improve observed
      performance under DNS load; see ticket for more details. Fixes bug
      40312; bugfix on 0.3.5.1-alpha.

  o Minor features (control port):
    - Provide congestion control fields on CIRC_BW and STREAM control
      port events, for use by sbws. Closes ticket 40568.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on March 25, 2022.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2022/03/25.

  o Minor bugfixes (DNSPort, dormant mode):
    - A request on the DNSPort now wakes up a dormant tor. Fixes bug
      40577; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (metrics port, onion service):
    - Fix the metrics with a port label to be unique. Before this, all
      ports of an onion service would be on the same line which violates
      the Prometheus rules of unique labels. Fixes bug 40581; bugfix
      on 0.4.5.1-alpha.

  o Minor bugfixes (onion service congestion control):
    - Avoid a non-fatal assertion failure in the case where we fail to
      set up congestion control on a rendezvous circuit. This could
      happen naturally if a cache entry expired at an unexpected time.
      Fixes bug 40576; bugfix on 0.4.7.4-alpha.

  o Minor bugfixes (onion service, client):
    - Fix a rare but fatal assertion failure due to a guard subsystem
      recursion triggered by the onion service client. Fixes bug 40579;
      bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (relay, overload):
    - Decide whether to signal overload based on a fraction and
      assessment period of ntor handshake drops. Previously, a single
      drop could trigger an overload state, which caused many false
      positives. Fixes bug 40560; bugfix on 0.4.7.1-alpha.


Changes in version 0.4.7.4-alpha - 2022-02-25
  This version contains the negotiation congestion control work which is the
  final part needed before going stable. There are also various bugfixes
  including two major ones detailed below. Last, the Exit notice page layout
  has been modernized but the text is unchanged. We recommend that all relay
  operators running any previous alpha upgrade to this one.

  o Major features (relay, client, onion services):
    - Implement RTT-based congestion control for exits and onion
      services, from Proposal 324. Disabled by default. Enabled by the
      'cc_alg' consensus parameter. Closes ticket 40444.

  o Major bugfixes (client):
    - Stop caching TCP connect failures to relays/bridges when we
      initiated the connection as a client. Now we only cache connect
      failures as a relay or bridge when we initiated them because of an
      EXTEND request. Declining to re-attempt the client-based
      connections could cause problems when we lose connectivity and try
      to reconnect. Fixes bug 40499; bugfix on 0.3.3.4-alpha.

  o Major bugfixes (relay, overload):
    - Do not trigger a general overload on DNS timeout. Even after
      fixing 40527, some code remained that triggered the overload.
      Fixes bug 40564; bugfix on 0.4.7.1-alpha.

  o Minor feature (authority, relay):
    - Reject End-Of-Life relays running version 0.3.5.x. Closes
      ticket 40559.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on February 25, 2022.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2022/02/25.

  o Minor bugfix (logging):
    - Update a log notice dead URL to a working one. Fixes bug 40544;
      bugfix on 0.3.5.1-alpha.

  o Minor bugfix (relay):
    - Remove the HSDir and HSIntro onion service v2 protocol versions so
      relay stop advertising that they support them. Fixes bug 40509;
      bugfix on 0.3.5.17.

  o Minor bugfixes (cell scheduling):
    - Avoid writing empty payload with NSS write.
    - Don't attempt to write 0 bytes after a cell scheduling loop. No
      empty payload was put on the wire. Fixes bug 40548; bugfix
      on 0.3.5.1-alpha.

  o Minor bugfixes (compilation):
    - Resume being able to build on old / esoteric gcc versions. Fixes
      bug 40550; bugfix on 0.4.7.1-alpha.

  o Minor bugfixes (compiler warnings):
    - Fix couple compiler warnings on latest Ubuntu Jammy. Fixes bug
      40516; bugfix on 0.3.5.1-alpha.

  o Documentation:
    - Provide an improved version of the tor-exit-notice.html file for
      exit relays to use as a landing page. The text is unchanged, but
      the page design and layout are significantly modernized, and
      several links are fixed. Patch from "n_user"; closes ticket 40529.

Revision 1.123: download - view: text, markup, annotated - select for diffs
Tue Feb 15 09:14:12 2022 UTC (2 years, 9 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2022Q1-base, pkgsrc-2022Q1
Diff to: previous 1.122: preferred, colored
Changes since revision 1.122: +4 -4 lines
tor: update to 0.4.6.10.

Changes in version 0.4.6.10 - 2022-02-04
  This version contains minor bugfixes but one in particular is that relays
  don't advertise onion service v2 support at the protocol version level.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on February 04, 2022.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2022/02/04.

  o Minor bugfix (logging):
    - Update a log notice dead URL to a working one. Fixes bug 40544;
      bugfix on 0.3.5.1-alpha.

  o Minor bugfix (relay):
    - Remove the HSDir and HSIntro onion service v2 protocol versions so
      relay stop advertising that they support them. Fixes bug 40509;
      bugfix on 0.3.5.17.

  o Minor bugfixes (MetricsPort, Prometheus):
    - Add double quotes to the label values of the onion service
      metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.

Revision 1.122: download - view: text, markup, annotated - select for diffs
Fri Dec 17 19:09:28 2021 UTC (2 years, 11 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2021Q4-base, pkgsrc-2021Q4
Diff to: previous 1.121: preferred, colored
Changes since revision 1.121: +4 -4 lines
tor: update to 0.4.6.9.

Changes in version 0.4.6.9 - 2021-12-15
  This version fixes several bugs from earlier versions of Tor. One important
  piece is the removal of DNS timeout metric from the overload general signal.
  See below for more details.

  o Major bugfixes (relay, overload):
    - Don't make Tor DNS timeout trigger an overload general state.
      These timeouts are different from DNS server timeout. They have to
      be seen as timeout related to UX and not because of a network
      problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.

  o Minor feature (reproducible build):
    - The repository can now build reproducible tarballs which adds the
      build command "make dist-reprod" for that purpose. Closes
      ticket 26299.

  o Minor features (compilation):
    - Give an error message if trying to build with a version of
      LibreSSL known not to work with Tor. (There's an incompatibility
      with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
      their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
      ticket 40511.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on December 15, 2021.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2021/12/15.

  o Minor bugfixes (compilation):
    - Fix our configuration logic to detect whether we had OpenSSL 3:
      previously, our logic was reversed. This has no other effect than
      to change whether we suppress deprecated API warnings. Fixes bug
      40429; bugfix on 0.3.5.13.

  o Minor bugfixes (relay):
    - Reject IPv6-only DirPorts. Our reachability self-test forces
      DirPorts to be IPv4, but our configuration parser allowed them to
      be IPv6-only, which led to an assertion failure. Fixes bug 40494;
      bugfix on 0.4.5.1-alpha.

  o Documentation (man, relay):
    - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
      bugfix on 0.4.6.1-alpha.

Revision 1.121: download - view: text, markup, annotated - select for diffs
Wed Oct 27 13:16:35 2021 UTC (3 years, 1 month ago) by wiz
Branches: MAIN
Diff to: previous 1.120: preferred, colored
Changes since revision 1.120: +4 -4 lines
tor: update to 0.4.6.8.

Changes in version 0.4.6.8 - 2021-10-26
  This version fixes several bugs from earlier versions of Tor. One
  highlight is a fix on how we track DNS timeouts to report general
  relay overload.

  o Major bugfixes (relay, overload state):
    - Relays report the general overload state for DNS timeout errors
      only if X% of all DNS queries over Y seconds are errors. Before
      that, it only took 1 timeout to report the overload state which
      was just too low of a threshold. The X and Y values are 1% and 10
      minutes respectively but they are also controlled by consensus
      parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.

  o Minor features (fallbackdir):
    - Regenerate fallback directories for October 2021. Closes
      ticket 40493.

  o Minor features (testing):
    - On a testing network, relays can now use the
      TestingMinTimeToReportBandwidth option to change the smallest
      amount of time over which they're willing to report their observed
      maximum bandwidth. Previously, this was fixed at 1 day. For
      safety, values under 2 hours are only supported on testing
      networks. Part of a fix for ticket 40337.
    - Relays on testing networks no longer rate-limit how frequently
      they are willing to report new bandwidth measurements. Part of a
      fix for ticket 40337.
    - Relays on testing networks now report their observed bandwidths
      immediately from startup. Previously, they waited until they had
      been running for a full day. Closes ticket 40337.

  o Minor bugfix (onion service):
    - Do not flag an HSDir as non-running in case the descriptor upload
      or fetch fails. An onion service closes pending directory
      connections before uploading a new descriptor which can thus lead
      to wrongly flagging many relays and thus affecting circuit building
      path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
    - Improve logging when a bad HS version is given. Fixes bug 40476;
      bugfix on 0.4.6.1-alpha.

  o Minor bugfix (CI, onion service):
    - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
      bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (compatibility):
    - Fix compatibility with the most recent Libevent versions, which no
      longer have an evdns_set_random_bytes() function. Because this
      function has been a no-op since Libevent 2.0.4-alpha, it is safe
      for us to just stop calling it. Fixes bug 40371; bugfix
      on 0.2.1.7-alpha.

  o Minor bugfixes (onion service, TROVE-2021-008):
    - Only log v2 access attempts once total, in order to not pollute
      the logs with warnings and to avoid recording the times on disk
      when v2 access was attempted. Note that the onion address was
      _never_ logged. This counts as a Low-severity security issue.
      Fixes bug 40474; bugfix on 0.4.5.8.

Revision 1.120: download - view: text, markup, annotated - select for diffs
Tue Oct 26 11:07:03 2021 UTC (3 years, 1 month ago) by nia
Branches: MAIN
Diff to: previous 1.119: preferred, colored
Changes since revision 1.119: +2 -2 lines

net: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Not committed (merge conflicts...):

net/radsecproxy/distinfo

The following distfiles could not be fetched (fetched conditionally?):

./net/citrix_ica/distinfo citrix_ica-10.6.115659/en.linuxx86.tar.gz
./net/djbdns/distinfo dnscache-1.05-multiple-ip.patch
./net/djbdns/distinfo djbdns-1.05-test28.diff.xz
./net/djbdns/distinfo djbdns-1.05-ignoreip2.patch
./net/djbdns/distinfo djbdns-1.05-multiip.diff
./net/djbdns/distinfo djbdns-cachestats.patch

Revision 1.119: download - view: text, markup, annotated - select for diffs
Thu Oct 7 14:42:54 2021 UTC (3 years, 1 month ago) by nia
Branches: MAIN
Diff to: previous 1.118: preferred, colored
Changes since revision 1.118: +1 -2 lines
net: Remove SHA1 hashes for distfiles

Revision 1.118: download - view: text, markup, annotated - select for diffs
Tue Aug 17 08:13:44 2021 UTC (3 years, 3 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2021Q3-base, pkgsrc-2021Q3
Diff to: previous 1.117: preferred, colored
Changes since revision 1.117: +5 -5 lines
tor: update to 0.4.6.7.

Changes in version 0.4.6.7 - 2021-08-16
  This version fixes several bugs from earlier versions of Tor,
  including one that could lead to a denial-of-service attack. Everyone
  running an earlier version, whether as a client, a relay, or an onion
  service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.

  o Major bugfixes (cryptography, security):
    - Resolve an assertion failure caused by a behavior mismatch between
      our batch-signature verification code and our single-signature
      verification code. This assertion failure could be triggered
      remotely, leading to a denial of service attack. We fix this issue
      by disabling batch verification. Fixes bug 40078; bugfix on
      0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
      CVE-2021-38385. Found by Henry de Valence.

  o Minor feature (fallbackdir):
    - Regenerate fallback directories list. Close ticket 40447.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2021/08/12.

  o Minor bugfix (crypto):
    - Disable the unused batch verification feature of ed25519-donna.
      Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
      de Valence.

  o Minor bugfixes (onion service):
    - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
      Address) for a v2 onion address. Fixes bug 40421; bugfix
      on 0.4.6.2-alpha.

  o Minor bugfixes (relay):
    - Reduce the compression level for data streaming from HIGH to LOW
      in order to reduce CPU load on the directory relays. Fixes bug
      40301; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (timekeeping):
    - Calculate the time of day correctly on systems where the time_t
      type includes leap seconds. (This is not the case on most
      operating systems, but on those where it occurs, our tor_timegm
      function did not correctly invert the system's gmtime function,
      which could result in assertion failures when calculating voting
      schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.

Revision 1.117: download - view: text, markup, annotated - select for diffs
Thu Jul 1 07:42:38 2021 UTC (3 years, 5 months ago) by wiz
Branches: MAIN
Diff to: previous 1.116: preferred, colored
Changes since revision 1.116: +5 -5 lines
tor: update to 0.4.6.6.

Changes in version 0.4.6.6 - 2021-06-30
  Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
  allows Tor to build correctly on older versions of GCC. You should
  upgrade to this version if you were having trouble building Tor
  0.4.6.5; otherwise, there is probably no need.

  o Minor bugfixes (compilation):
    - Fix a compilation error when trying to build Tor with a compiler
      that does not support const variables in static initializers.
      Fixes bug 40410; bugfix on 0.4.6.5.
    - Suppress a strict-prototype warning when building with some
      versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (testing):
    - Enable the deterministic RNG for unit tests that covers the
      address set bloomfilter-based API's. Fixes bug 40419; bugfix
      on 0.3.3.2-alpha.

Revision 1.116: download - view: text, markup, annotated - select for diffs
Sun Jun 27 21:18:38 2021 UTC (3 years, 5 months ago) by wiz
Branches: MAIN
Diff to: previous 1.115: preferred, colored
Changes since revision 1.115: +5 -5 lines
tor: update to 0.4.6.5.

Changes in version 0.4.6.5 - 2021-06-14
  Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
  series includes numerous features and bugfixes, including a significant
  improvement to our circuit timeout algorithm that should improve
  observed client performance, and a way for relays to report when they are
  overloaded.

  This release also includes security fixes for several security issues,
  including a denial-of-service attack against onion service clients,
  and another denial-of-service attack against relays. Everybody should
  upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.

  o Major bugfixes (security):
    - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
      half-closed streams. Previously, clients failed to validate which
      hop sent these cells: this would allow a relay on a circuit to end
      a stream that wasn't actually built with it. Fixes bug 40389;
      bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
      003 and CVE-2021-34548.

  o Major bugfixes (security, defense-in-depth):
    - Detect more failure conditions from the OpenSSL RNG code.
      Previously, we would detect errors from a missing RNG
      implementation, but not failures from the RNG code itself.
      Fortunately, it appears those failures do not happen in practice
      when Tor is using OpenSSL's default RNG implementation. Fixes bug
      40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
      TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.

  o Major bugfixes (security, denial of service):
    - Resist a hashtable-based CPU denial-of-service attack against
      relays. Previously we used a naive unkeyed hash function to look
      up circuits in a circuitmux object. An attacker could exploit this
      to construct circuits with chosen circuit IDs, to create
      collisions and make the hash table inefficient. Now we use a
      SipHash construction here instead. Fixes bug 40391; bugfix on
      0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
      CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
    - Fix an out-of-bounds memory access in v3 onion service descriptor
      parsing. An attacker could exploit this bug by crafting an onion
      service descriptor that would crash any client that tried to visit
      it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
      tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
      Glazunov from Google's Project Zero.

  o Major features (control port, onion services):
    - Add controller support for creating version 3 onion services with
      client authorization. Previously, only v2 onion services could be
      created with client authorization. Closes ticket 40084. Patch by
      Neel Chauhan.

  o Major features (directory authority):
    - When voting on a relay with a Sybil-like appearance, add the Sybil
      flag when clearing out the other flags. This lets a relay operator
      know why their relay hasn't been included in the consensus. Closes
      ticket 40255. Patch by Neel Chauhan.

  o Major features (metrics):
    - Relays now report how overloaded they are in their extrainfo
      documents. This information is controlled with the
      OverloadStatistics torrc option, and it will be used to improve
      decisions about the network's load balancing. Implements proposal
      328; closes ticket 40222.

  o Major features (relay, denial of service):
    - Add a new DoS subsystem feature to control the rate of client
      connections for relays. Closes ticket 40253.

  o Major features (statistics):
    - Relays now publish statistics about the number of v3 onion
      services and volume of v3 onion service traffic, in the same
      manner they already do for v2 onions. Closes ticket 23126.

  o Major bugfixes (circuit build timeout):
    - Improve the accuracy of our circuit build timeout calculation for
      60%, 70%, and 80% build rates for various guard choices. We now
      use a maximum likelihood estimator for Pareto parameters of the
      circuit build time distribution, instead of a "right-censored
      estimator". This causes clients to ignore circuits that never
      finish building in their timeout calculations. Previously, clients
      were counting such unfinished circuits as having the highest
      possible build time value, when in reality these circuits most
      likely just contain relays that are offline. We also now wait a
      bit longer to let circuits complete for measurement purposes,
      lower the minimum possible effective timeout from 1.5 seconds to
      10ms, and increase the resolution of the circuit build time
      histogram from 50ms bin widths to 10ms bin widths. Additionally,
      we alter our estimate Xm by taking the maximum of the top 10 most
      common build time values of the 10ms histogram, and compute Xm as
      the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
    - Remove max_time calculation and associated warning from circuit
      build timeout 'alpha' parameter estimation, as this is no longer
      needed by our new estimator from 40168. Fixes bug 34088; bugfix
      on 0.2.2.9-alpha.

  o Major bugfixes (signing key):
    - In the tor-gencert utility, give an informative error message if
      the passphrase given in `--create-identity-key` is too short.
      Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.

  o Minor features (bridge):
    - We now announce the URL to Tor's new bridge status at
      https://bridges.torproject.org/ when Tor is configured to run as a
      bridge relay. Closes ticket 30477.

  o Minor features (build system):
    - New "make lsp" command to auto generate the compile_commands.json
      file used by the ccls server. The "bear" program is needed for
      this. Closes ticket 40227.

  o Minor features (client):
    - Clients now check whether their streams are attempting to re-enter
      the Tor network (i.e. to send Tor traffic over Tor), and close
      them preemptively if they think exit relays will refuse them for
      this reason. See ticket 2667 for details. Closes ticket 40271.

  o Minor features (command line):
    - Add long format name "--torrc-file" equivalent to the existing
      command-line option "-f". Closes ticket 40324. Patch by
      Daniel Pinto.

  o Minor features (command-line interface):
    - Add build informations to `tor --version` in order to ease
      reproducible builds. Closes ticket 32102.
    - When parsing command-line flags that take an optional argument,
      treat the argument as absent if it would start with a '-'
      character. Arguments in that form are not intelligible for any of
      our optional-argument flags. Closes ticket 40223.
    - Allow a relay operator to list the ed25519 keys on the command
      line by adding the `rsa` and `ed25519` arguments to the
      --list-fingerprint flag to show the respective RSA and ed25519
      relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.

  o Minor features (compatibility):
    - Remove an assertion function related to TLS renegotiation. It was
      used nowhere outside the unit tests, and it was breaking
      compilation with recent alpha releases of OpenSSL 3.0.0. Closes
      ticket 40399.

  o Minor features (control port, stream handling):
    - Add the stream ID to the event line in the ADDRMAP control event.
      Closes ticket 40249. Patch by Neel Chauhan.

  o Minor features (dormant mode):
    - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
      control over whether the client ever becomes dormant from
      inactivity. Most people won't need this. Closes ticket 40228.
    - Add a new 'DormantTimeoutEnabled' option for coarse-grained
      control over whether the client can become dormant from
      inactivity. Most people won't need this. Closes ticket 40228.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2021/06/10.

  o Minor features (logging):
    - Edit heartbeat log messages so that more of them begin with the
      string "Heartbeat: ". Closes ticket 40322; patch
      from 'cypherpunks'.
    - Change the DoS subsystem heartbeat line format to be more clear on
      what has been detected/rejected, and which option is disabled (if
      any). Closes ticket 40308.
    - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
      put brackets around IPv6 addresses in log messages. Closes ticket
      40232. Patch by Neel Chauhan.

  o Minor features (logging, diagnostic):
    - Log decompression failures at a higher severity level, since they
      can help provide missing context for other warning messages. We
      rate-limit these messages, to avoid flooding the logs if they
      begin to occur frequently. Closes ticket 40175.

  o Minor features (onion services):
    - Add a warning message when trying to connect to (no longer
      supported) v2 onion services. Closes ticket 40373.

  o Minor features (performance, windows):
    - Use SRWLocks to implement locking on Windows. Replaces the
      "critical section" locking implementation with the faster
      SRWLocks, available since Windows Vista. Closes ticket 17927.
      Patch by Daniel Pinto.

  o Minor features (protocol, proxy support, defense in depth):
    - Close HAProxy connections if they somehow manage to send us data
      before we start reading. Closes another case of ticket 40017.

  o Minor features (tests, portability):
    - Port the hs_build_address.py test script to work with recent
      versions of python. Closes ticket 40213. Patch from
      Samanta Navarro.

  o Minor features (vote document):
    - Add a "stats" line to directory authority votes, to report various
      statistics that authorities compute about the relays. This will
      help us diagnose the network better. Closes ticket 40314.

  o Minor bugfixes (build):
    - The configure script now shows whether or not lzma and zstd have
      been used, not just if the enable flag was passed in. Fixes bug
      40236; bugfix on 0.4.3.1-alpha.

  o Minor bugfixes (compatibility):
    - Fix a failure in the test cases when running on the "hppa"
      architecture, along with a related test that might fail on other
      architectures in the future. Fixes bug 40274; bugfix
      on 0.2.5.1-alpha.

  o Minor bugfixes (compilation):
    - Fix a compilation warning about unused functions when building
      with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
      40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.

  o Minor bugfixes (consensus handling):
    - Avoid a set of bugs that could be caused by inconsistently
      preferring an out-of-date consensus stored in a stale directory
      cache over a more recent one stored on disk as the latest
      consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.

  o Minor bugfixes (control, sandbox):
    - Allow the control command SAVECONF to succeed when the seccomp
      sandbox is enabled, and make SAVECONF keep only one backup file to
      simplify implementation. Previously SAVECONF allowed a large
      number of backup files, which made it incompatible with the
      sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
      Daniel Pinto.

  o Minor bugfixes (directory authorities, voting):
    - Add a new consensus method (31) to support any future changes that
      authorities decide to make to the value of bwweightscale or
      maxunmeasuredbw. Previously, there was a bug that prevented the
      authorities from parsing these consensus parameters correctly under
      most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.

  o Minor bugfixes (ipv6):
    - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
      rare configurations might break, but in this case you can disable
      NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
      on 0.4.1.1-alpha. Patch by Neel Chauhan.

  o Minor bugfixes (key generation):
    - Do not require a valid torrc when using the `--keygen` argument to
      generate a signing key. This allows us to generate keys on systems
      or users which may not run Tor. Fixes bug 40235; bugfix on
      0.2.7.2-alpha. Patch by Neel Chauhan.

  o Minor bugfixes (logging, relay):
    - Emit a warning if an Address is found to be internal and tor can't
      use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.

  o Minor bugfixes (metrics port):
    - Fix a bug that made tor try to re-bind() on an already open
      MetricsPort every 60 seconds. Fixes bug 40370; bugfix
      on 0.4.5.1-alpha.

  o Minor bugfixes (onion services, logging):
    - Downgrade the severity of a few rendezvous circuit-related
      warnings from warning to info. Fixes bug 40207; bugfix on
      0.3.2.1-alpha. Patch by Neel Chauhan.

  o Minor bugfixes (relay):
    - Reduce the compression level for data streaming from HIGH to LOW.
      This should reduce the CPU and memory burden for directory caches.
      Fixes bug 40301; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (testing, BSD):
    - Fix pattern-matching errors when patterns expand to invalid paths
      on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
      Daniel Pinto.

  o Code simplification and refactoring:
    - Remove the orconn_ext_or_id_map structure and related functions.
      (Nothing outside of unit tests used them.) Closes ticket 33383.
      Patch by Neel Chauhan.

  o Removed features:
    - Remove unneeded code for parsing private keys in directory
      documents. This code was only used for client authentication in v2
      onion services, which are now unsupported. Closes ticket 40374.
    - As of this release, Tor no longer supports the old v2 onion
      services. They were deprecated last July for security, and support
      will be removed entirely later this year. We strongly encourage
      everybody to migrate to v3 onion services. For more information,
      see https://blog.torproject.org/v2-deprecation-timeline . Closes
      ticket 40266. (NOTE: We accidentally released an earlier version
      of the 0.4.6.1-alpha changelog without this entry. Sorry for
      the confusion!)

  o Code simplification and refactoring (metrics, DoS):
    - Move the DoS subsystem into the subsys manager, including its
      configuration options. Closes ticket 40261.

  o Documentation (manual):
    - Move the ServerTransport* options to the "SERVER OPTIONS" section.
      Closes issue 40331.
    - Indicate that the HiddenServiceStatistics option also applies to
      bridges. Closes ticket 40346.
    - Move the description of BridgeRecordUsageByCountry to the section
      "STATISTICS OPTIONS". Closes ticket 40323.

  o Removed features (relay):
    - Because DirPorts are only used on authorities, relays no longer
      advertise them. Similarly, self-testing for DirPorts has been
      disabled, since an unreachable DirPort is no reason for a relay
      not to advertise itself. (Configuring a DirPort will still work,
      for now.) Closes ticket 40282.

Revision 1.115: download - view: text, markup, annotated - select for diffs
Mon Jun 14 17:46:43 2021 UTC (3 years, 5 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2021Q2-base, pkgsrc-2021Q2
Diff to: previous 1.114: preferred, colored
Changes since revision 1.114: +5 -5 lines
tor: update to 0.4.5.9.

Changes in version 0.4.5.9 - 2021-06-14
  Tor 0.4.5.9 fixes several security issues, including a
  denial-of-service attack against onion service clients, and another
  denial-of-service attack against relays. Everybody should upgrade to
  one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.

  o Major bugfixes (security, backport from 0.4.6.5):
    - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
      half-closed streams. Previously, clients failed to validate which
      hop sent these cells: this would allow a relay on a circuit to end
      a stream that wasn't actually built with it. Fixes bug 40389;
      bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
      003 and CVE-2021-34548.

  o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
    - Detect more failure conditions from the OpenSSL RNG code.
      Previously, we would detect errors from a missing RNG
      implementation, but not failures from the RNG code itself.
      Fortunately, it appears those failures do not happen in practice
      when Tor is using OpenSSL's default RNG implementation. Fixes bug
      40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
      TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.

  o Major bugfixes (security, denial of service, backport from 0.4.6.5):
    - Resist a hashtable-based CPU denial-of-service attack against
      relays. Previously we used a naive unkeyed hash function to look
      up circuits in a circuitmux object. An attacker could exploit this
      to construct circuits with chosen circuit IDs, to create
      collisions and make the hash table inefficient. Now we use a
      SipHash construction here instead. Fixes bug 40391; bugfix on
      0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
      CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
    - Fix an out-of-bounds memory access in v3 onion service descriptor
      parsing. An attacker could exploit this bug by crafting an onion
      service descriptor that would crash any client that tried to visit
      it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
      tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
      Glazunov from Google's Project Zero.

  o Minor features (compatibility, backport from 0.4.6.4-rc):
    - Remove an assertion function related to TLS renegotiation. It was
      used nowhere outside the unit tests, and it was breaking
      compilation with recent alpha releases of OpenSSL 3.0.0. Closes
      ticket 40399.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2021/06/10.

  o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
    - Allow the control command SAVECONF to succeed when the seccomp
      sandbox is enabled, and make SAVECONF keep only one backup file to
      simplify implementation. Previously SAVECONF allowed a large
      number of backup files, which made it incompatible with the
      sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
      Daniel Pinto.

  o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
    - Fix a bug that made tor try to re-bind() on an already open
      MetricsPort every 60 seconds. Fixes bug 40370; bugfix
      on 0.4.5.1-alpha.

Revision 1.114: download - view: text, markup, annotated - select for diffs
Sun May 23 11:14:01 2021 UTC (3 years, 6 months ago) by wiz
Branches: MAIN
Diff to: previous 1.113: preferred, colored
Changes since revision 1.113: +5 -5 lines
tor: update to 0.4.5.8.

Changes in version 0.4.5.8 - 2021-05-10
  Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
  from the 0.4.6.x series.

  o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
    - Add a workaround to enable the Linux sandbox to work correctly
      with Glibc 2.33. This version of Glibc has started using the
      fstatat() system call, which previously our sandbox did not allow.
      Closes ticket 40382; see the ticket for a discussion of trade-offs.

  o Minor features (compilation, backport from 0.4.6.3-rc):
    - Make the autoconf script build correctly with autoconf versions
      2.70 and later. Closes part of ticket 40335.

  o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
    - Regenerate the list of fallback directories to contain a new set
      of 200 relays. Closes ticket 40265.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2021/05/07.

  o Minor features (onion services):
    - Add warning message when connecting to now deprecated v2 onion
      services. As announced, Tor 0.4.5.x is the last series that will
      support v2 onions. Closes ticket 40373.

  o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
    - Fix a regression that made it impossible start Tor using a bridge
      line with a transport name and no fingerprint. Fixes bug 40360;
      bugfix on 0.4.5.4-rc.

  o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
    - Allow a custom "ar" for cross-compilation. Our previous build
      script had used the $AR environment variable in most places, but
      it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.

  o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
    - Fix a non-fatal BUG() message due to a too-early free of a string,
      when listing a client connection from the DoS defenses subsystem.
      Fixes bug 40345; bugfix on 0.4.3.4-rc.

  o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
    - Fix an indentation problem that led to a warning from GCC 11.1.1.
      Fixes bug 40380; bugfix on 0.3.0.1-alpha.

  o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
    - Fix a "BUG" warning that would appear when a controller chooses
      the first hop for a circuit, and that circuit completes. Fixes bug
      40285; bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
    - Fix a bug where an expired cached descriptor could get overwritten
      with a new one without freeing it, leading to a memory leak. Fixes
      bug 40356; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
    - Fix pattern-matching errors when patterns expand to invalid paths
      on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
      Daniel Pinto.

Revision 1.113: download - view: text, markup, annotated - select for diffs
Tue Mar 16 16:25:21 2021 UTC (3 years, 8 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2021Q1-base, pkgsrc-2021Q1
Diff to: previous 1.112: preferred, colored
Changes since revision 1.112: +5 -6 lines
tor: update to 0.4.5.7.

  Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
  versions of Tor.

  One of these vulnerabilities (TROVE-2021-001) would allow an attacker
  who can send directory data to a Tor instance to force that Tor
  instance to consume huge amounts of CPU. This is easiest to exploit
  against authorities, since anybody can upload to them, but directory
  caches could also exploit this vulnerability against relays or clients
  when they download. The other vulnerability (TROVE-2021-002) only
  affects directory authorities, and would allow an attacker to remotely
  crash the authority with an assertion failure. Patches have already
  been provided to the authority operators, to help ensure
  network stability.

  We recommend that everybody upgrade to one of the releases that fixes
  these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
  to you.

  This release also updates our GeoIP data source, and fixes a few
  smaller bugs in earlier releases.

  o Major bugfixes (security, denial of service):
    - Disable the dump_desc() function that we used to dump unparseable
      information to disk. It was called incorrectly in several places,
      in a way that could lead to excessive CPU usage. Fixes bug 40286;
      bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
      001 and CVE-2021-28089.
    - Fix a bug in appending detached signatures to a pending consensus
      document that could be used to crash a directory authority. Fixes
      bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
      and CVE-2021-28090.

  o Minor features (geoip data):
    - We have switched geoip data sources. Previously we shipped IP-to-
      country mappings from Maxmind's GeoLite2, but in 2019 they changed
      their licensing terms, so we were unable to update them after that
      point. We now ship geoip files based on the IPFire Location
      Database instead. (See https://location.ipfire.org/ for more
      information). This release updates our geoip files to match the
      IPFire Location Database as retrieved on 2021/03/12. Closes
      ticket 40224.

  o Minor bugfixes (directory authority):
    - Now that exit relays don't allow exit connections to directory
      authority DirPorts (to prevent network reentry), disable
      authorities' reachability self test on the DirPort. Fixes bug
      40287; bugfix on 0.4.5.5-rc.

  o Minor bugfixes (documentation):
    - Fix a formatting error in the documentation for
      VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.

  o Minor bugfixes (Linux, relay):
    - Fix a bug in determining total available system memory that would
      have been triggered if the format of Linux's /proc/meminfo file
      had ever changed to include "MemTotal:" in the middle of a line.
      Fixes bug 40315; bugfix on 0.2.5.4-alpha.

  o Minor bugfixes (metrics port):
    - Fix a BUG() warning on the MetricsPort for an internal missing
      handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.

  o Minor bugfixes (onion service):
    - Remove a harmless BUG() warning when reloading tor configured with
      onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.

  o Minor bugfixes (portability):
    - Fix a non-portable usage of "==" with "test" in the configure
      script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.

  o Minor bugfixes (relay):
    - Remove a spammy log notice falsely claiming that the IPv4/v6
      address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
    - Do not query the address cache early in the boot process when
      deciding if a relay needs to fetch early directory information
      from an authority. This bug resulted in a relay falsely believing
      it didn't have an address and thus triggering an authority fetch
      at each boot. Related to our fix for 40300.

  o Removed features (mallinfo deprecated):
    - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
      Closes ticket 40309.

Revision 1.112: download - view: text, markup, annotated - select for diffs
Mon Feb 15 19:01:31 2021 UTC (3 years, 9 months ago) by wiz
Branches: MAIN
Diff to: previous 1.111: preferred, colored
Changes since revision 1.111: +6 -5 lines
tor: update to 0.4.5.6.

Changes in version 0.4.5.6 - 2021-02-15
  The Tor 0.4.5.x release series is dedicated to the memory of Karsten
  Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
  Karsten is best known for creating the Tor metrics portal and leading
  the metrics team, but he was involved in Tor from the early days. For
  example, while he was still a student he invented and implemented the
  v2 onion service directory design, and he also served as an ambassador
  to the many German researchers working in the anonymity field. We
  loved him and respected him for his patience, his consistency, and his
  welcoming approach to growing our community.

  This release series introduces significant improvements in relay IPv6
  address discovery, a new "MetricsPort" mechanism for relay operators
  to measure performance, LTTng support, build system improvements to
  help when using Tor as a static library, and significant bugfixes
  related to Windows relay performance. It also includes numerous
  smaller features and bugfixes.

Revision 1.110.2.1: download - view: text, markup, annotated - select for diffs
Thu Feb 4 15:35:11 2021 UTC (3 years, 9 months ago) by bsiegert
Branches: pkgsrc-2020Q4
Diff to: previous 1.110: preferred, colored; next MAIN 1.111: preferred, colored
Changes since revision 1.110: +5 -29 lines
Pullup ticket #6418 - requested by wiz
net/tor: security fix

Revisions pulled up:
- net/tor/Makefile                                              1.159
- net/tor/distinfo                                              1.111
- net/tor/options.mk                                            1.15

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Wed Feb  3 19:55:28 UTC 2021

   Modified Files:
   	pkgsrc/net/tor: Makefile distinfo options.mk

   Log Message:
   tor: update to 0.4.4.7.

   Changes in version 0.4.4.7 - 2021-02-03
     Tor 0.4.4.7 backports numerous bugfixes from later releases,
     including one that made v3 onion services more susceptible to
     denial-of-service attacks, and a feature that makes some kinds of
     DoS attacks harder to perform.

     o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
       - Stop requiring a live consensus for v3 clients and services, and
         allow a "reasonably live" consensus instead. This allows v3 onion
         services to work even if the authorities fail to generate a
         consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
         on 0.3.5.1-alpha.

     o Major feature (exit, backport from 0.4.5.5-rc):
       - Re-entry into the network is now denied at the Exit level to all
         relays' ORPorts and authorities' ORPorts and DirPorts. This change
         should help mitgate a set of denial-of-service attacks. Closes
         ticket 2667.

     o Minor feature (build system, backport from 0.4.5.4-rc):
       - New "make lsp" command to generate the compile_commands.json file
         used by the ccls language server. The "bear" program is needed for
         this. Closes ticket 40227.

     o Minor features (compilation, backport from 0.4.5.2-rc):
       - Disable deprecation warnings when building with OpenSSL 3.0.0 or
         later. There are a number of APIs newly deprecated in OpenSSL
         3.0.0 that Tor still requires. (A later version of Tor will try to
         stop depending on these APIs.) Closes ticket 40165.

     o Minor features (crypto, backport from 0.4.5.3-rc):
       - Fix undefined behavior on our Keccak library. The bug only
         appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
         and would result in wrong digests. Fixes bug 40210; bugfix on
         0.2.8.1-alpha. Thanks to Bernhard ?belacker, Arnd Bergmann and
         weasel for diagnosing this.

     o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
       - Strip '\r' characters when reading text files on Unix platforms.
         This should resolve an issue where a relay operator migrates a
         relay from Windows to Unix, but does not change the line ending of
         Tor's various state files to match the platform, and the CRLF line
         endings from Windows end up leaking into other files such as the
         extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.

     o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
       - Fix a compilation warning about unreachable fallthrough
         annotations when building with "--enable-all-bugs-are-fatal" on
         some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.

     o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
       - Handle partial SOCKS5 messages correctly. Previously, our code
         would send an incorrect error message if it got a SOCKS5 request
         that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.

     o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
       - Fix the `config/parse_tcp_proxy_line` test so that it works
         correctly on systems where the DNS provider hijacks invalid
         queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
       - Fix our Python reference-implementation for the v3 onion service
         handshake so that it works correctly with the version of hashlib
         provided by Python 3.9. Fixes part of bug 40179; bugfix
         on 0.3.1.6-rc.
       - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
         3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.

Revision 1.111: download - view: text, markup, annotated - select for diffs
Wed Feb 3 19:55:27 2021 UTC (3 years, 9 months ago) by wiz
Branches: MAIN
Diff to: previous 1.110: preferred, colored
Changes since revision 1.110: +5 -29 lines
tor: update to 0.4.4.7.

Changes in version 0.4.4.7 - 2021-02-03
  Tor 0.4.4.7 backports numerous bugfixes from later releases,
  including one that made v3 onion services more susceptible to
  denial-of-service attacks, and a feature that makes some kinds of
  DoS attacks harder to perform.

  o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
    - Stop requiring a live consensus for v3 clients and services, and
      allow a "reasonably live" consensus instead. This allows v3 onion
      services to work even if the authorities fail to generate a
      consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
      on 0.3.5.1-alpha.

  o Major feature (exit, backport from 0.4.5.5-rc):
    - Re-entry into the network is now denied at the Exit level to all
      relays' ORPorts and authorities' ORPorts and DirPorts. This change
      should help mitgate a set of denial-of-service attacks. Closes
      ticket 2667.

  o Minor feature (build system, backport from 0.4.5.4-rc):
    - New "make lsp" command to generate the compile_commands.json file
      used by the ccls language server. The "bear" program is needed for
      this. Closes ticket 40227.

  o Minor features (compilation, backport from 0.4.5.2-rc):
    - Disable deprecation warnings when building with OpenSSL 3.0.0 or
      later. There are a number of APIs newly deprecated in OpenSSL
      3.0.0 that Tor still requires. (A later version of Tor will try to
      stop depending on these APIs.) Closes ticket 40165.

  o Minor features (crypto, backport from 0.4.5.3-rc):
    - Fix undefined behavior on our Keccak library. The bug only
      appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
      and would result in wrong digests. Fixes bug 40210; bugfix on
      0.2.8.1-alpha. Thanks to Bernhard Ãœbelacker, Arnd Bergmann and
      weasel for diagnosing this.

  o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
    - Strip '\r' characters when reading text files on Unix platforms.
      This should resolve an issue where a relay operator migrates a
      relay from Windows to Unix, but does not change the line ending of
      Tor's various state files to match the platform, and the CRLF line
      endings from Windows end up leaking into other files such as the
      extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.

  o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
    - Fix a compilation warning about unreachable fallthrough
      annotations when building with "--enable-all-bugs-are-fatal" on
      some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.

  o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
    - Handle partial SOCKS5 messages correctly. Previously, our code
      would send an incorrect error message if it got a SOCKS5 request
      that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
    - Fix the `config/parse_tcp_proxy_line` test so that it works
      correctly on systems where the DNS provider hijacks invalid
      queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
    - Fix our Python reference-implementation for the v3 onion service
      handshake so that it works correctly with the version of hashlib
      provided by Python 3.9. Fixes part of bug 40179; bugfix
      on 0.3.1.6-rc.
    - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
      3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.

Revision 1.110: download - view: text, markup, annotated - select for diffs
Thu Nov 12 22:56:00 2020 UTC (4 years ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2020Q4-base
Branch point for: pkgsrc-2020Q4
Diff to: previous 1.109: preferred, colored
Changes since revision 1.109: +29 -5 lines
tor: update to 0.4.4.6.

Disable rust option since it currently doesn't work.

Changes in version 0.4.4.6 - 2020-11-12
  Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
  backports fixes from later releases, including a fix for TROVE-2020-
  005, a security issue that could be used, under certain cases, by an
  adversary to observe traffic patterns on a limited number of circuits
  intended for a different relay.

  o Major bugfixes (security, backport from 0.4.5.1-alpha):
    - When completing a channel, relays now check more thoroughly to
      make sure that it matches any pending circuits before attaching
      those circuits. Previously, address correctness and Ed25519
      identities were not checked in this case, but only when extending
      circuits on an existing channel. Fixes bug 40080; bugfix on
      0.2.7.2-alpha. Resolves TROVE-2020-005.

  o Minor features (directory authorities, backport from 0.4.5.1-alpha):
    - Authorities now list a different set of protocols as required and
      recommended. These lists have been chosen so that only truly
      recommended and/or required protocols are included, and so that
      clients using 0.2.9 or later will continue to work (even though
      they are not supported), whereas only relays running 0.3.5 or
      later will meet the requirements. Closes ticket 40162.
    - Make it possible to specify multiple ConsensusParams torrc lines.
      Now directory authority operators can for example put the main
      ConsensusParams config in one torrc file and then add to it from a
      different torrc file. Closes ticket 40164.

  o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
    - Tor no longer allows subprotocol versions larger than 63.
      Previously version numbers up to UINT32_MAX were allowed, which
      significantly complicated our code. Implements proposal 318;
      closes ticket 40133.

  o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
    - Fix a rendezvous cache unit test that was triggering an underflow
      on the global rend cache allocation. Fixes bug 40125; bugfix
      on 0.2.8.1-alpha.
    - Fix another rendezvous cache unit test that was triggering an
      underflow on the global rend cache allocation. Fixes bug 40126;
      bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
    - Fix compiler warnings that would occur when building with
      "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
      same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
    - Resolve a compilation warning that could occur in
      test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.

  o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
    - Remove a debug logging statement that uselessly spammed the logs.
      Fixes bug 40135; bugfix on 0.3.5.0-alpha.

  o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
    - Avoid a fatal assert() when failing to create a listener
      connection for an address that was in use. Fixes bug 40073; bugfix
      on 0.3.5.1-alpha.

  o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
    - For HSFETCH commands on v2 onion services addresses, check the
      length of bytes decoded, not the base32 length. Fixes bug 34400;
      bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.

Revision 1.109: download - view: text, markup, annotated - select for diffs
Tue Sep 15 19:12:55 2020 UTC (4 years, 2 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2020Q3-base, pkgsrc-2020Q3
Diff to: previous 1.108: preferred, colored
Changes since revision 1.108: +5 -5 lines
tor: update to 0.4.4.5.

Changes in version 0.4.4.5 - 2020-09-15
  Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
  series improves our guard selection algorithms, adds v3 onion balance
  support, improves the amount of code that can be disabled when running
  without relay support, and includes numerous small bugfixes and
  enhancements. It also lays the ground for some IPv6 features that
  we'll be developing more in the next (0.4.5) series.

  Per our support policy, we support each stable release series for nine
  months after its first stable release, or three months after the first
  stable release of the next series: whichever is longer. This means
  that 0.4.4.x will be supported until around June 2021--or later, if
  0.4.5.x is later than anticipated.

  Note also that support for 0.4.2.x has just ended; support for 0.4.3
  will continue until Feb 15, 2021. We still plan to continue supporting
  0.3.5.x, our long-term stable series, until Feb 2022.

  o Major features (Proposal 310, performance + security):
    - Implements Proposal 310, "Bandaid on guard selection". Proposal
      310 solves load-balancing issues with older versions of the guard
      selection algorithm, and improves its security. Under this new
      algorithm, a newly selected guard never becomes Primary unless all
      previously sampled guards are unreachable. Implements
      recommendation from 32088. (Proposal 310 is linked to the CLAPS
      project researching optimal client location-aware path selections.
      This project is a collaboration between the UCLouvain Crypto Group,
      the U.S. Naval Research Laboratory, and Princeton University.)

  o Major features (fallback directory list):
    - Replace the 148 fallback directories originally included in Tor
      0.4.1.4-rc (of which around 105 are still functional) with a list
      of 144 fallbacks generated in July 2020. Closes ticket 40061.

  o Major features (IPv6, relay):
    - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
      warning if the IPv4 or IPv6 address is an internal address, and
      internal addresses are not allowed. But continue to use the other
      address, if it is valid. Closes ticket 33817.
    - If a relay can extend over IPv4 and IPv6, and both addresses are
      provided, it chooses between them uniformly at random. Closes
      ticket 33817.
    - Re-use existing IPv6 connections for circuit extends. Closes
      ticket 33817.
    - Relays may extend circuits over IPv6, if the relay has an IPv6
      ORPort, and the client supplies the other relay's IPv6 ORPort in
      the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
      ORPort self-tests in 33222. Closes ticket 33817.

  o Major features (v3 onion services):
    - Allow v3 onion services to act as OnionBalance backend instances,
      by using the HiddenServiceOnionBalanceInstance torrc option.
      Closes ticket 32709.

  o Major bugfixes (NSS):
    - When running with NSS enabled, make sure that NSS knows to expect
      nonblocking sockets. Previously, we set our TCP sockets as
      nonblocking, but did not tell NSS, which in turn could lead to
      unexpected blocking behavior. Fixes bug 40035; bugfix
      on 0.3.5.1-alpha.

  o Major bugfixes (onion services, DoS):
    - Correct handling of parameters for the onion service DoS defense.
      Previously, the consensus parameters for the onion service DoS
      defenses were overwriting the parameters set by the service
      operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
      40109; bugfix on 0.4.2.1-alpha.

  o Major bugfixes (stats, onion services):
    - Fix a bug where we were undercounting the Tor network's total
      onion service traffic, by ignoring any traffic originating from
      clients. Now we count traffic from both clients and services.
      Fixes bug 40117; bugfix on 0.2.6.2-alpha.

  o Minor features (security):
    - Channels using obsolete versions of the Tor link protocol are no
      longer allowed to circumvent address-canonicity checks. (This is
      only a minor issue, since such channels have no way to set ed25519
      keys, and therefore should always be rejected for circuits that
      specify ed25519 identities.) Closes ticket 40081.

  o Minor features (bootstrap reporting):
    - Report more detailed reasons for bootstrap failure when the
      failure happens due to a TLS error. Previously we would just call
      these errors "MISC" when they happened during read, and "DONE"
      when they happened during any other TLS operation. Closes
      ticket 32622.

  o Minor features (client-only compilation):
    - Disable more code related to the ext_orport protocol when
      compiling without support for relay mode. Closes ticket 33368.
    - Disable more of our self-testing code when support for relay mode
      is disabled. Closes ticket 33370.
    - Most server-side DNS code is now disabled when building without
      support for relay mode. Closes ticket 33366.

  o Minor features (code safety):
    - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
      functions in DNS and IP address processing code, and adjust
      codepaths to make them less likely to crash entire Tor instances.
      Resolves issue 33788.

  o Minor features (continuous integration):
    - Run unit-test and integration test (Stem, Chutney) jobs with
      ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
      Resolves ticket 32143.

  o Minor features (control port):
    - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
      onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
      Closes ticket 40089. Patch by Neel Chauhan.
    - Return a descriptive error message from the 'GETINFO status/fresh-
      relay-descs' command on the control port. Previously, we returned
      a generic error of "Error generating descriptor". Closes ticket
      32873. Patch by Neel Chauhan.

  o Minor features (defense in depth):
    - Wipe more data from connection address fields before returning
      them to the memory heap. Closes ticket 6198.

  o Minor features (denial-of-service memory limiter):
    - Allow the user to configure even lower values for the
      MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
      when previously the minimum was 256 MB. On clients, there is no
      minimum. Relays and clients will both warn if the value is set so
      low that Tor is likely to stop working. Closes ticket 24308.

  o Minor features (developer tooling):
    - Add a script to help check the alphabetical ordering of option
      names in the manual page. Closes ticket 33339.
    - Refrain from listing all .a files that are generated by the Tor
      build in .gitignore. Add a single wildcard *.a entry that covers
      all of them for present and future. Closes ticket 33642.
    - Add a script ("git-install-tools.sh") to install git hooks and
      helper scripts. Closes ticket 33451.

  o Minor features (directory authority):
    - Authorities now recommend the protocol versions that are supported
      by Tor 0.3.5 and later. (Earlier versions of Tor have been
      deprecated since January of this year.) This recommendation will
      cause older clients and relays to give a warning on startup, or
      when they download a consensus directory. Closes ticket 32696.

  o Minor features (directory authority, shared random):
    - Refactor more authority-only parts of the shared-random scheduling
      code to reside in the dirauth module, and to be disabled when
      compiling with --disable-module-dirauth. Closes ticket 33436.

  o Minor features (directory):
    - Remember the number of bytes we have downloaded for each directory
      purpose while bootstrapping, and while fully bootstrapped. Log
      this information as part of the heartbeat message. Closes
      ticket 32720.

  o Minor features (entry guards):
    - Reinstate support for GUARD NEW/UP/DOWN control port events.
      Closes ticket 40001.

  o Minor features (IPv6 support):
    - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
      changes and tor_addr_is_null(). Closes ticket 33679. Patch
      by MrSquanchee.
    - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
      cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
      Closes ticket 33901.

  o Minor features (linux seccomp2 sandbox, portability):
    - Allow Tor to build on platforms where it doesn't know how to
      report which syscall caused the linux seccomp2 sandbox to fail.
      This change should make the sandbox code more portable to less
      common Linux architectures. Closes ticket 34382.
    - Permit the unlinkat() syscall, which some Libc implementations use
      to implement unlink(). Closes ticket 33346.

  o Minor features (logging):
    - When trying to find our own address, add debug-level logging to
      report the sources of candidate addresses. Closes ticket 32888.

  o Minor features (onion service client, SOCKS5):
    - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
      new type of onion service connection failures. The semantics of
      these error codes are documented in proposal 309. Closes
      ticket 32542.

  o Minor features (onion service v3):
    - If a service cannot upload its descriptor(s), log why at INFO
      level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.

  o Minor features (python scripts):
    - Stop assuming that /usr/bin/python exists. Instead of using a
      hardcoded path in scripts that still use Python 2, use
      /usr/bin/env, similarly to the scripts that use Python 3. Fixes
      bug 33192; bugfix on 0.4.2.

  o Minor features (testing, architecture):
    - Our test scripts now double-check that subsystem initialization
      order is consistent with the inter-module dependencies established
      by our .may_include files. Implements ticket 31634.
    - Initialize all subsystems at the beginning of our unit test
      harness, to avoid crashes due to uninitialized subsystems. Follow-
      up from ticket 33316.
    - Our "make check" target now runs the unit tests in 8 parallel
      chunks. Doing this speeds up hardened CI builds by more than a
      factor of two. Closes ticket 40098.

  o Minor features (v3 onion services):
    - Add v3 onion service status to the dumpstats() call which is
      triggered by a SIGUSR1 signal. Previously, we only did v2 onion
      services. Closes ticket 24844. Patch by Neel Chauhan.

  o Minor features (windows):
    - Add support for console control signals like Ctrl+C in Windows.
      Closes ticket 34211. Patch from Damon Harris (TheDcoder).

  o Minor bugfixes (control port, onion service):
    - Consistently use 'address' in "Invalid v3 address" response to
      ONION_CLIENT_AUTH commands. Previously, we would sometimes say
      'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.

  o Minor bugfixes (correctness, buffers):
    - Fix a correctness bug that could cause an assertion failure if we
      ever tried using the buf_move_all() function with an empty input
      buffer. As far as we know, no released versions of Tor do this.
      Fixes bug 40076; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (directory authorities):
    - Directory authorities now reject votes that arrive too late. In
      particular, once an authority has started fetching missing votes,
      it no longer accepts new votes posted by other authorities. This
      change helps prevent a consensus split, where only some authorities
      have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.

  o Minor bugfixes (git scripts):
    - Stop executing the checked-out pre-commit hook from the pre-push
      hook. Instead, execute the copy in the user's git directory. Fixes
      bug 33284; bugfix on 0.4.1.1-alpha.

  o Minor bugfixes (initialization):
    - Initialize the subsystems in our code in an order more closely
      corresponding to their dependencies, so that every system is
      initialized before the ones that (theoretically) depend on it.
      Fixes bug 33316; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (IPv4, relay):
    - Check for invalid zero IPv4 addresses and ports when sending and
      receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.

  o Minor bugfixes (IPv6, relay):
    - Consider IPv6 addresses when checking if a connection is
      canonical. In 17604, relays assumed that a remote relay could
      consider an IPv6 connection canonical, but did not set the
      canonical flag on their side of the connection. Fixes bug 33899;
      bugfix on 0.3.1.1-alpha.
    - Log IPv6 addresses on connections where this relay is the
      responder. Previously, responding relays would replace the remote
      IPv6 address with the IPv4 address from the consensus. Fixes bug
      33899; bugfix on 0.3.1.1-alpha.

  o Minor bugfixes (linux seccomp2 sandbox):
    - Fix a regression on sandboxing rules for the openat() syscall. The
      fix for bug 25440 fixed the problem on systems with glibc >= 2.27
      but broke with versions of glibc. We now choose a rule based on
      the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
      bugfix on 0.3.5.11.
    - Makes the seccomp sandbox allow the correct syscall for opendir
      according to the running glibc version. This fixes crashes when
      reloading torrc with sandbox enabled when running on glibc 2.15 to
      2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
      on 0.3.5.11.

  o Minor bugfixes (logging, testing):
    - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
      and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
      used to log a non-fatal warning, regardless of the debugging
      mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
    - Remove surprising empty line in the INFO-level log about circuit
      build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (mainloop):
    - Better guard against growing a buffer past its maximum 2GB in
      size. Fixes bug 33131; bugfix on 0.3.0.4-rc.

  o Minor bugfixes (onion service v3 client):
    - Remove a BUG() warning that could occur naturally. Fixes bug
      34087; bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (onion service, logging):
    - Fix a typo in a log message PublishHidServDescriptors is set to 0.
      Fixes bug 33779; bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (onion services v3):
    - Avoid a non-fatal assertion failure in certain edge-cases when
      opening an intro circuit as a client. Fixes bug 34084; bugfix
      on 0.3.2.1-alpha.

  o Minor bugfixes (protocol versions):
    - Sort tor's supported protocol version lists, as recommended by the
      tor directory specification. Fixes bug 33285; bugfix
      on 0.4.0.1-alpha.

  o Minor bugfixes (rate limiting, bridges, pluggable transports):
    - On a bridge, treat all connections from an ExtORPort as remote by
      default for the purposes of rate-limiting. Previously, bridges
      would treat the connection as local unless they explicitly
      received a "USERADDR" command. ExtORPort connections still count
      as local if there is a USERADDR command with an explicit local
      address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.

  o Minor bugfixes (refactoring):
    - Lift circuit_build_times_disabled() out of the
      circuit_expire_building() loop, to save CPU time when there are
      many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.

  o Minor bugfixes (relay, self-testing):
    - When starting up as a relay, if we haven't been able to verify
      that we're reachable, only launch reachability tests at most once
      a minute. Previously, we had been launching tests up to once a
      second, which was needlessly noisy. Fixes bug 40083; bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (relay, usability):
    - Adjust the rules for when to warn about having too many
      connections to other relays. Previously we'd tolerate up to 1.5
      connections per relay on average. Now we tolerate more connections
      for directory authorities, and raise the number of total
      connections we need to see before we warn. Fixes bug 33880; bugfix
      on 0.3.1.1-alpha.

  o Minor bugfixes (SOCKS, onion service client):
    - Detect v3 onion service addresses of the wrong length when
      returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
      on 0.4.3.1-alpha.

  o Minor bugfixes (tests):
    - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
      on its own. Previously, it would exit with an error. Fixes bug
      40099; bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (v3 onion services):
    - Remove a BUG() warning that could trigger in certain unlikely
      edge-cases. Fixes bug 34086; bugfix on 0.3.2.1-alpha.
    - Remove a BUG() that was causing a stacktrace when a descriptor
      changed at an unexpected time. Fixes bug 28992; bugfix
      on 0.3.2.1-alpha.

  o Minor bugfixes (windows):
    - Fix a bug that prevented Tor from starting if its log file grew
      above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.

  o Code simplification and refactoring:
    - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
      TOR_ADDR_BUF_LEN but includes enough space for an IP address,
      brackets, separating colon, and port number. Closes ticket 33956.
      Patch by Neel Chauhan.
    - Merge the orconn and ocirc events into the "core" subsystem, which
      manages or connections and origin circuits. Previously they were
      isolated in subsystems of their own.
    - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
      inversion. Closes ticket 33633.
    - Move the circuit extend code to the relay module. Split the
      circuit extend function into smaller functions. Closes
      ticket 33633.
    - Rewrite port_parse_config() to use the default port flags from
      port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
    - Updated comments in 'scheduler.c' to reflect old code changes, and
      simplified the scheduler channel state change code. Closes
      ticket 33349.
    - Refactor configuration parsing to use the new config subsystem
      code. Closes ticket 33014.
    - Move a series of functions related to address resolving into their
      own files. Closes ticket 33789.

  o Documentation:
    - Replace most http:// URLs in our code and documentation with
      https:// URLs. (We have left unchanged the code in src/ext/, and
      the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
    - Document the limitations of using %include on config files with
      seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
      0.3.1.1-alpha. Patch by Daniel Pinto.

  o Removed features:
    - Our "check-local" test target no longer tries to use the
      Coccinelle semantic patching tool parse all the C files. While it
      is a good idea to try to make sure Coccinelle works on our C
      before we run a Coccinelle patch, doing so on every test run has
      proven to be disruptive. You can still run this tool manually with
      "make check-cocci". Closes ticket 40030.
    - Remove the ClientAutoIPv6ORPort option. This option attempted to
      randomly choose between IPv4 and IPv6 for client connections, and
      wasn't a true implementation of Happy Eyeballs. Often, this option
      failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
      Patch by Neel Chauhan.
    - Stop shipping contrib/dist/rc.subr file, as it is not being used
      on FreeBSD anymore. Closes issue 31576.

  o Testing:
    - Add a basic IPv6 test to "make test-network". This test only runs
      when the local machine has an IPv6 stack. Closes ticket 33300.
    - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
      These jobs run the IPv4-only and dual-stack chutney flavours from
      test-network-all. Closes ticket 33280.
    - Remove a redundant distcheck job. Closes ticket 33194.
    - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
      chutney job. This job runs on macOS, so it's a bit slow. Closes
      ticket 33303.
    - Sort the Travis jobs in order of speed. Putting the slowest jobs
      first takes full advantage of Travis job concurrency. Closes
      ticket 33194.
    - Stop allowing the Chutney IPv6 Travis job to fail. This job was
      previously configured to fast_finish (which requires
      allow_failure), to speed up the build. Closes ticket 33195.
    - Test v3 onion services to tor's mixed IPv4 chutney network. And
      add a mixed IPv6 chutney network. These networks are used in the
      test-network-all, test-network-ipv4, and test-network-ipv6 make
      targets. Closes ticket 33334.
    - Use the "bridges+hs-v23" chutney network flavour in "make test-
      network". This test requires a recent version of chutney (mid-
      February 2020). Closes ticket 28208.
    - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
      tool to produce detailed diagnostic output. Closes ticket 32792.

  o Deprecated features (onion service v2):
    - Add a deprecation warning for version 2 onion services. Closes
      ticket 40003.

  o Documentation (manual page):
    - Add cross reference links and a table of contents to the HTML tor
      manual page. Closes ticket 33369. Work by Swati Thacker as part of
      Google Season of Docs.
    - Alphabetize the Denial of Service Mitigation Options, Directory
      Authority Server Options, Hidden Service Options, and Testing
      Network Options sections of the tor(1) manual page. Closes ticket
      33275. Work by Swati Thacker as part of Google Season of Docs.
    - Refrain from mentioning nicknames in manpage section for MyFamily
      torrc option. Resolves issue 33417.
    - Updated the options set by TestingTorNetwork in the manual page.
      Closes ticket 33778.

Revision 1.108: download - view: text, markup, annotated - select for diffs
Thu Jul 9 18:08:43 2020 UTC (4 years, 4 months ago) by leot
Branches: MAIN
Diff to: previous 1.107: preferred, colored
Changes since revision 1.107: +5 -30 lines
tor: Update to 0.4.3.6

pkgsrc changes:
 - Remove patch-configure: applied upstream

Changes:
Changes in version 0.4.3.6 - 2020-07-09
  Tor 0.4.3.6 backports several bugfixes from later releases, including
  some affecting usability.

  This release also fixes TROVE-2020-001, a medium-severity denial of
  service vulnerability affecting all versions of Tor when compiled with
  the NSS encryption library. (This is not the default configuration.)
  Using this vulnerability, an attacker could cause an affected Tor
  instance to crash remotely. This issue is also tracked as CVE-2020-
  15572. Anybody running a version of Tor built with the NSS library
  should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
  or later.

  o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
    - Fix a crash due to an out-of-bound memory access when Tor is
      compiled with NSS support. Fixes bug 33119; bugfix on
      0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
      and CVE-2020-15572.

  o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
    - Use the correct 64-bit printf format when compiling with MINGW on
      Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.

  o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
    - Resume use of preemptively-built circuits when UseEntryGuards is set
      to 0. We accidentally disabled this feature with that config
      setting, leading to slower load times. Fixes bug 34303; bugfix
      on 0.3.3.2-alpha.

  o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
    - Fix a compiler warning on platforms with 32-bit time_t values.
      Fixes bug 40028; bugfix on 0.3.2.8-rc.

  o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
    - Fix a startup crash when tor is compiled with --enable-nss and
      sandbox support is enabled. Fixes bug 34130; bugfix on
      0.3.5.1-alpha. Patch by Daniel Pinto.

  o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
    - Downgrade a noisy log message that could occur naturally when
      receiving an extrainfo document that we no longer want. Fixes bug
      16016; bugfix on 0.2.6.3-alpha.

  o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
    - Update the man page to reflect that MinUptimeHidServDirectoryV2
      defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.

  o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
    - Prevent an assert() that would occur when cleaning the client
      descriptor cache, and attempting to close circuits for a non-
      decrypted descriptor (lacking client authorization). Fixes bug
      33458; bugfix on 0.4.2.1-alpha.

  o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
    - Fix a portability error in the configure script, where we were
      using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.

  o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
    - Stop advertising incorrect IPv6 ORPorts in relay and bridge
      descriptors, when the IPv6 port was configured as "auto". Fixes
      bug 32588; bugfix on 0.2.3.9-alpha.

  o Documentation (backport from 0.4.4.1-alpha):
    - Fix several doxygen warnings related to imbalanced groups. Closes
      ticket 34255.

Revision 1.107: download - view: text, markup, annotated - select for diffs
Fri May 15 16:39:34 2020 UTC (4 years, 6 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2020Q2-base, pkgsrc-2020Q2
Diff to: previous 1.106: preferred, colored
Changes since revision 1.106: +6 -5 lines
tor: update to 0.4.3.5.

Changes in version 0.4.3.5 - 2020-05-15
  Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
  series adds support for building without relay code enabled, and
  implements functionality needed for OnionBalance with v3 onion
  services. It includes significant refactoring of our configuration and
  controller functionality, and fixes numerous smaller bugs and
  performance issues.

  Per our support policy, we support each stable release series for nine
  months after its first stable release, or three months after the first
  stable release of the next series: whichever is longer. This means
  that 0.4.3.x will be supported until around February 2021--later, if
  0.4.4.x is later than anticipated.

  Note also that support for 0.4.1.x is about to end on May 20 of this
  year; 0.4.2.x will be supported until September 15. We still plan to
  continue supporting 0.3.5.x, our long-term stable series, until
  Feb 2022.

  Below are the changes since 0.4.2.6. For a list of only the changes
  since 0.4.3.4-rc, see the ChangeLog file.

  o New system requirements:
    - When building Tor, you now need to have Python 3 in order to run
      the integration tests. (Python 2 is officially unsupported
      upstream, as of 1 Jan 2020.) Closes ticket 32608.

  o Major features (build system):
    - The relay code can now be disabled using the --disable-module-relay
      configure option. When this option is set, we also disable the
      dirauth module. Closes ticket 32123.
    - When Tor is compiled --disable-module-relay, we also omit the code
      used to act as a directory cache. Closes ticket 32487.

  o Major features (directory authority, ed25519):
    - Add support for banning a relay's ed25519 keys in the approved-
      routers file. This will help us migrate away from RSA keys in the
      future. Previously, only RSA keys could be banned in approved-
      routers. Resolves ticket 22029. Patch by Neel Chauhan.

  o Major features (onion services):
    - New control port commands to manage client-side onion service
      authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
      a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
      ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
    - Introduce a new SocksPort flag, ExtendedErrors, to support more
      detailed error codes in information for applications that support
      them. Closes ticket 30382; implements proposal 304.

  o Major features (proxy):
    - In addition to its current supported proxy types (HTTP CONNECT,
      SOCKS4, and SOCKS5), Tor can now make its OR connections through a
      HAProxy server. A new torrc option was added to specify the
      address/port of the server: TCPProxy <protocol> <host>:<port>.
      Currently the only supported protocol for the option is haproxy.
      Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).

  o Major bugfixes (security, denial-of-service):
    - Fix a denial-of-service bug that could be used by anyone to
      consume a bunch of CPU on any Tor relay or authority, or by
      directories to consume a bunch of CPU on clients or hidden
      services. Because of the potential for CPU consumption to
      introduce observable timing patterns, we are treating this as a
      high-severity security issue. Fixes bug 33119; bugfix on
      0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
      as TROVE-2020-002 and CVE-2020-10592.

  o Major bugfixes (circuit padding, memory leak):
    - Avoid a remotely triggered memory leak in the case that a circuit
      padding machine is somehow negotiated twice on the same circuit.
      Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
      This is also tracked as TROVE-2020-004 and CVE-2020-10593.

  o Major bugfixes (directory authority):
    - Directory authorities will now send a 503 (not enough bandwidth)
      code to clients when under bandwidth pressure. Known relays and
      other authorities will always be answered regardless of the
      bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.

  o Major bugfixes (DoS defenses, bridges, pluggable transport):
    - Fix a bug that was preventing DoS defenses from running on bridges
      with a pluggable transport. Previously, the DoS subsystem was not
      given the transport name of the client connection, thus failed to
      find the GeoIP cache entry for that client address. Fixes bug
      33491; bugfix on 0.3.3.2-alpha.

  o Major bugfixes (networking):
    - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
      and accept strings as well as binary addresses. Fixes bug 32315;
      bugfix on 0.3.5.1-alpha.

  o Major bugfixes (onion service):
    - Report HS circuit failure back into the HS subsystem so we take
      appropriate action with regards to the client introduction point
      failure cache. This improves reachability of onion services, since
      now clients notice failing introduction circuits properly. Fixes
      bug 32020; bugfix on 0.3.2.1-alpha.

  o Minor feature (heartbeat, onion service):
    - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
      message. Closes ticket 31371.

  o Minor feature (sendme, flow control):
    - Default to sending SENDME version 1 cells. (Clients are already
      sending these, because of a consensus parameter telling them to do
      so: this change only affects what clients would do if the
      consensus didn't contain a recommendation.) Closes ticket 33623.

  o Minor features (best practices tracker):
    - Practracker now supports a --regen-overbroad option to regenerate
      the exceptions file, but only to revise exceptions to be _less_
      tolerant of best-practices violations. Closes ticket 32372.

  o Minor features (configuration validation):
    - Configuration validation can now be done by per-module callbacks,
      rather than a global validation function. This will let us reduce
      the size of config.c and some of its more cumbersome functions.
      Closes ticket 31241.

  o Minor features (configuration):
    - If a configured hardware crypto accelerator in AccelName is
      prefixed with "!", Tor now exits when it cannot be found. Closes
      ticket 32406.
    - We now use flag-driven logic to warn about obsolete configuration
      fields, so that we can include their names. In 0.4.2, we used a
      special type, which prevented us from generating good warnings.
      Implements ticket 32404.

  o Minor features (configure, build system):
    - Output a list of enabled/disabled features at the end of the
      configure process in a pleasing way. Closes ticket 31373.

  o Minor features (continuous integration):
    - Run Doxygen Makefile target on Travis, so we can learn about
      regressions in our internal documentation. Closes ticket 32455.
    - Stop allowing failures on the Travis CI stem tests job. It looks
      like all the stem hangs we were seeing before are now fixed.
      Closes ticket 33075.

  o Minor features (controller):
    - Add stream isolation data to STREAM event. Closes ticket 19859.
    - Implement a new GETINFO command to fetch microdescriptor
      consensus. Closes ticket 31684.

  o Minor features (debugging, directory system):
    - Don't crash when we find a non-guard with a guard-fraction value
      set. Instead, log a bug warning, in an attempt to figure out how
      this happened. Diagnostic for ticket 32868.

  o Minor features (defense in depth):
    - Add additional checks around tor_vasprintf() usage, in case the
      function returns an error. Patch by Tobias Stoeckmann. Fixes
      ticket 31147.

  o Minor features (developer tools):
    - Remove the 0.2.9.x series branches from git scripts (git-merge-
      forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
      Closes ticket 32772.
    - Add a check_cocci_parse.sh script that checks that new code is
      parseable by Coccinelle. Add an exceptions file for unparseable
      files, and run the script from travis CI. Closes ticket 31919.
    - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
      target. Closes ticket 31919.
    - Add a rename_c_identifiers.py tool to rename a bunch of C
      identifiers at once, and generate a well-formed commit message
      describing the change. This should help with refactoring. Closes
      ticket 32237.
    - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
      semantic patching tool with the correct flags. These flags are
      fairly easy to forget, and these scripts should help us use
      Coccinelle more effectively in the future. Closes ticket 31705.

  o Minor features (diagnostic):
    - Improve assertions and add some memory-poisoning code to try to
      track down possible causes of a rare crash (32564) in the EWMA
      code. Closes ticket 33290.

  o Minor features (directory authorities):
    - Directory authorities now reject descriptors from relays running
      Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
      still allowed. Resolves ticket 32672. Patch by Neel Chauhan.

  o Minor features (Doxygen):
    - Update Doxygen configuration file to a more recent template (from
      1.8.15). Closes ticket 32110.
    - "make doxygen" now works with out-of-tree builds. Closes
      ticket 32113.
    - Make sure that doxygen outputs documentation for all of our C
      files. Previously, some were missing @file declarations, causing
      them to be ignored. Closes ticket 32307.
    - Our "make doxygen" target now respects --enable-fatal-warnings by
      default, and does not warn about items that are missing
      documentation. To warn about missing documentation, run configure
      with the "--enable-missing-doc-warnings" flag: doing so suspends
      fatal warnings for doxygen. Closes ticket 32385.

  o Minor features (git scripts):
    - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
      customisation. Closes ticket 32347.
    - Add git-setup-dirs.sh, which sets up an upstream git repository
      and worktrees for tor maintainers. Closes ticket 29603.
    - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
      remote. Closes ticket 32347.
    - Call the check_cocci_parse.sh script from the git commit and push
      hooks. Closes ticket 31919.
    - Make git-push-all.sh skip unchanged branches when pushing to
      upstream. The script already skipped unchanged test branches.
      Closes ticket 32216.
    - Make git-setup-dirs.sh create a master symlink in the worktree
      directory. Closes ticket 32347.
    - Skip unmodified source files when doing some existing git hook
      checks. Related to ticket 31919.

  o Minor features (IPv6, client):
    - Make Tor clients tell dual-stack exits that they prefer IPv6
      connections. This change is equivalent to setting the PreferIPv6
      flag on SOCKSPorts (and most other listener ports). Tor Browser
      has been setting this flag for some time, and we want to remove a
      client distinguisher at exits. Closes ticket 32637.

  o Minor features (portability, android):
    - When building for Android, disable some tests that depend on $HOME
      and/or pwdb, which Android doesn't have. Closes ticket 32825.
      Patch from Hans-Christoph Steiner.

  o Minor features (relay modularity):
    - Split the relay and server pluggable transport config code into
      separate files in the relay module. Disable this code when the
      relay module is disabled. Closes part of ticket 32213.
    - When the relay module is disabled, reject attempts to set the
      ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
      ServerTransport* options, rather than ignoring the values of these
      options. Closes part of ticket 32213.
    - When the relay module is disabled, change the default config so
      that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.

  o Minor features (release tools):
    - Port our ChangeLog formatting and sorting tools to Python 3.
      Closes ticket 32704.

  o Minor features (testing):
    - The unit tests now support a "TOR_SKIP_TESTCASES" environment
      variable to specify a list of space-separated test cases that
      should not be executed. We will use this to disable certain tests
      that are failing on Appveyor because of mismatched OpenSSL
      libraries. Part of ticket 33643.
    - Detect some common failure cases for test_parseconf.sh in
      src/test/conf_failures. Closes ticket 32451.
    - Allow test_parseconf.sh to test expected log outputs for successful
      configs, as well as failed configs. Closes ticket 32451.
    - The test_parseconf.sh script now supports result variants for any
      combination of the optional libraries lzma, nss, and zstd. Closes
      ticket 32397.
    - When running the unit tests on Android, create temporary files in
      a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
      patch from Hans-Christoph Steiner.

  o Minor features (usability):
    - Include more information when failing to parse a configuration
      value. This should make it easier to tell what's going wrong when
      a configuration file doesn't parse. Closes ticket 33460.

  o Minor bugfix (relay, configuration):
    - Warn if the ContactInfo field is not set, and tell the relay
      operator that not having a ContactInfo field set might cause their
      relay to get rejected in the future. Fixes bug 33361; bugfix
      on 0.1.1.10-alpha.

  o Minor bugfixes (bridges):
    - Lowercase the configured value of BridgeDistribution before adding
      it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.

  o Minor bugfixes (build system):
    - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
      bugfix on 0.4.1.2-alpha.

  o Minor bugfixes (compiler compatibility):
    - Avoid compiler warnings from Clang 10 related to the use of GCC-
      style "/* falls through */" comments. Both Clang and GCC allow
      __attribute__((fallthrough)) instead, so that's what we're using
      now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
    - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
      on 0.4.0.3-alpha.

  o Minor bugfixes (configuration handling):
    - Make control_event_conf_changed() take in a config_line_t instead
      of a smartlist of alternating key/value entries. Fixes bug 31531;
      bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
    - Check for multiplication overflow when parsing memory units inside
      configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
    - When dumping the configuration, stop adding a trailing space after
      the option name when there is no option value. This issue only
      affects options that accept an empty value or list. (Most options
      reject empty values, or delete the entire line from the dumped
      options.) Fixes bug 32352; bugfix on 0.0.9pre6.
    - Avoid changing the user's value of HardwareAccel as stored by
      SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
      bug 32382; bugfix on 0.2.2.1-alpha.
    - When creating a KeyDirectory with the same location as the
      DataDirectory (not recommended), respect the DataDirectory's
      group-readable setting if one has not been set for the
      KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (continuous integration):
    - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
      on 0.3.2.2-alpha.

  o Minor bugfixes (controller protocol):
    - When receiving "ACTIVE" or "DORMANT" signals on the control port,
      report them as SIGNAL events. Previously we would log a bug
      warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (controller):
    - In routerstatus_has_changed(), check all the fields that are
      output over the control port. Fixes bug 20218; bugfix
      on 0.1.1.11-alpha.

  o Minor bugfixes (developer tools):
    - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
      31336; bugfix on 0.4.1.2-alpha.

  o Minor bugfixes (dirauth module):
    - Split the dirauth config code into a separate file in the dirauth
      module. Disable this code when the dirauth module is disabled.
      Closes ticket 32213.
    - When the dirauth module is disabled, reject attempts to set the
      AuthoritativeDir option, rather than ignoring the value of the
      option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.

  o Minor bugfixes (embedded Tor):
    - When starting Tor any time after the first time in a process,
      register the thread in which it is running as the main thread.
      Previously, we only did this on Windows, which could lead to bugs
      like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
      on 0.3.3.1-alpha.

  o Minor bugfixes (git scripts):
    - Avoid sleeping before the last push in git-push-all.sh. Closes
      ticket 32216.
    - Forward all unrecognised arguments in git-push-all.sh to git push.
      Closes ticket 32216.

  o Minor bugfixes (key portability):
    - When reading PEM-encoded key data, tolerate CRLF line-endings even
      if we are not running on Windows. Previously, non-Windows hosts
      would reject these line-endings in certain positions, making
      certain key files hard to move from one host to another. Fixes bug
      33032; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (logging):
    - Stop truncating IPv6 addresses and ports in channel and connection
      logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
    - Flush stderr, stdout, and file logs during shutdown, if supported
      by the OS. This change helps make sure that any final logs are
      recorded. Fixes bug 33087; bugfix on 0.4.1.6.
    - Stop closing stderr and stdout during shutdown. Closing these file
      descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
      on 0.4.1.6.
    - If we encounter a bug when flushing a buffer to a TLS connection,
      only log the bug once per invocation of the Tor process.
      Previously we would log with every occurrence, which could cause
      us to run out of disk space. Fixes bug 33093; bugfix
      on 0.3.2.2-alpha.
    - When logging a bug, do not say "Future instances of this warning
      will be silenced" unless we are actually going to silence them.
      Previously we would say this whenever a BUG() check failed in the
      code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.

  o Minor bugfixes (onion services v2):
    - Move a series of v2 onion service warnings to protocol-warning
      level because they can all be triggered remotely by a malformed
      request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
    - When sending the INTRO cell for a v2 Onion Service, look at the
      failure cache alongside timeout values to check if the intro point
      is marked as failed. Previously, we only looked at the relay
      timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
      Neel Chauhan.

  o Minor bugfixes (onion services v3):
    - Remove a BUG() warning that would cause a stack trace if an onion
      service descriptor was freed while we were waiting for a
      rendezvous circuit to complete. Fixes bug 28992; bugfix
      on 0.3.2.1-alpha.
    - Relax severity of a log message that can appear naturally when
      decoding onion service descriptors as a relay. Also add some
      diagnostics to debug any future bugs in that area. Fixes bug
      31669; bugfix on 0.3.0.1-alpha.
    - Fix an assertion failure that could result from a corrupted
      ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
      bugfix on 0.3.3.1-alpha. This issue is also tracked
      as TROVE-2020-003.
    - Properly handle the client rendezvous circuit timeout. Previously
      Tor would sometimes timeout a rendezvous circuit awaiting the
      introduction ACK, and find itself unable to re-establish all
      circuits because the rendezvous circuit timed out too early. Fixes
      bug 32021; bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (onion services):
    - Do not rely on a "circuit established" flag for intro circuits but
      instead always query the HS circuit map. This is to avoid sync
      issue with that flag and the map. Fixes bug 32094; bugfix
      on 0.3.2.1-alpha.

  o Minor bugfixes (onion services, all):
    - In cancel_descriptor_fetches(), use
      connection_list_by_type_purpose() instead of
      connection_list_by_type_state(). Fixes bug 32639; bugfix on
      0.3.2.1-alpha. Patch by Neel Chauhan.

  o Minor bugfixes (pluggable transports):
    - When receiving a message on standard error from a pluggable
      transport, log it at info level, rather than as a warning. Fixes
      bug 33005; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (rust, build):
    - Fix a syntax warning given by newer versions of Rust that was
      creating problems for our continuous integration. Fixes bug 33212;
      bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (scripts):
    - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
      bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (testing):
    - Use the same code to find the tor binary in all of our test
      scripts. This change makes sure we are always using the coverage
      binary when coverage is enabled. Fixes bug 32368; bugfix
      on 0.2.7.3-rc.
    - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
      Fixes bug 32468; bugfix on 0.4.2.1-alpha.
    - Our option-validation tests no longer depend on specially
      configured non-default, non-passing sets of options. Previously,
      the tests had been written to assume that options would _not_ be
      set to their defaults, which led to needless complexity and
      verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (TLS bug handling):
    - When encountering a bug in buf_read_from_tls(), return a "MISC"
      error code rather than "WANTWRITE". This change might help avoid
      some CPU-wasting loops if the bug is ever triggered. Bug reported
      by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.

  o Deprecated features:
    - Deprecate the ClientAutoIPv6ORPort option. This option was not
      true "Happy Eyeballs", and often failed on connections that
      weren't reliably dual-stack. Closes ticket 32942. Patch by
      Neel Chauhan.

  o Documentation:
    - Provide a quickstart guide for a Circuit Padding Framework, and
      documentation for researchers to implement and study circuit
      padding machines. Closes ticket 28804.
    - Add documentation in 'HelpfulTools.md' to describe how to build a
      tag file. Closes ticket 32779.
    - Create a high-level description of the long-term software
      architecture goals. Closes ticket 32206.
    - Describe the --dump-config command in the manual page. Closes
      ticket 32467.
    - Unite coding advice from this_not_that.md in torguts repo into our
      coding standards document. Resolves ticket 31853.

  o Removed features:
    - Our Doxygen configuration no longer generates LaTeX output. The
      reference manual produced by doing this was over 4000 pages long,
      and generally unusable. Closes ticket 32099.
    - The option "TestingEstimatedDescriptorPropagationTime" is now
      marked as obsolete. It has had no effect since 0.3.0.7, when
      clients stopped rejecting consensuses "from the future". Closes
      ticket 32807.
    - We no longer support consensus methods before method 28; these
      methods were only used by authorities running versions of Tor that
      are now at end-of-life. In effect, this means that clients,
      relays, and authorities now assume that authorities will be
      running version 0.3.5.x or later. Closes ticket 32695.

  o Testing:
    - Avoid conflicts between the fake sockets in tor's unit tests, and
      real file descriptors. Resolves issues running unit tests with
      GitHub Actions, where the process that embeds or launches the
      tests has already opened a large number of file descriptors. Fixes
      bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
      Putta Khunchalee.
    - Add more test cases for tor's UTF-8 validation function. Also,
      check the arguments passed to the function for consistency. Closes
      ticket 32845.
    - Improve test coverage for relay and dirauth config code, focusing
      on option validation and normalization. Closes ticket 32213.
    - Improve the consistency of test_parseconf.sh output, and run all
      the tests, even if one fails. Closes ticket 32213.
    - Run the practracker unit tests in the pre-commit git hook. Closes
      ticket 32609.

  o Code simplification and refactoring (channel):
    - Channel layer had a variable length cell handler that was not used
      and thus removed. Closes ticket 32892.

  o Code simplification and refactoring (configuration):
    - Immutability is now implemented as a flag on individual
      configuration options rather than as part of the option-transition
      checking code. Closes ticket 32344.
    - Instead of keeping a list of configuration options to check for
      relative paths, check all the options whose type is "FILENAME".
      Solves part of ticket 32339.
    - Our default log (which ordinarily sends NOTICE-level messages to
      standard output) is now handled in a more logical manner.
      Previously, we replaced the configured log options if they were
      empty. Now, we interpret an empty set of log options as meaning
      "use the default log". Closes ticket 31999.
    - Remove some unused arguments from the options_validate() function,
      to simplify our code and tests. Closes ticket 32187.
    - Simplify the options_validate() code so that it looks at the
      default options directly, rather than taking default options as an
      argument. This change lets us simplify its interface. Closes
      ticket 32185.
    - Use our new configuration architecture to move most authority-
      related options to the directory authority module. Closes
      ticket 32806.
    - When parsing the command line, handle options that determine our
      "quiet level" and our mode of operation (e.g., --dump-config and
      so on) all in one table. Closes ticket 32003.

  o Code simplification and refactoring (controller):
    - Create a new abstraction for formatting control protocol reply
      lines based on key-value pairs. Refactor some existing control
      protocol code to take advantage of this. Closes ticket 30984.
    - Create a helper function that can fetch network status or
      microdesc consensuses. Closes ticket 31684.

  o Code simplification and refactoring (dirauth modularization):
    - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
      Closes ticket 32163.
    - Replace some confusing identifiers in process_descs.c. Closes
      ticket 29826.
    - Simplify some relay and dirauth config code. Closes ticket 32213.

  o Code simplification and refactoring (mainloop):
    - Simplify the ip_address_changed() function by removing redundant
      checks. Closes ticket 33091.

  o Code simplification and refactoring (misc):
    - Make all the structs we declare follow the same naming convention
      of ending with "_t". Closes ticket 32415.
    - Move and rename some configuration-related code for clarity.
      Closes ticket 32304.
    - Our include.am files are now broken up by subdirectory.
      Previously, src/core/include.am covered all of the subdirectories
      in "core", "feature", and "app". Closes ticket 32137.
    - Remove underused NS*() macros from test code: they make our tests
      more confusing, especially for code-formatting tools. Closes
      ticket 32887.

  o Code simplification and refactoring (relay modularization):
    - Disable relay_periodic when the relay module is disabled. Closes
      ticket 32244.
    - Disable relay_sys when the relay module is disabled. Closes
      ticket 32245.

  o Code simplification and refactoring (tool support):
    - Add numerous missing dependencies to our include files, so that
      they can be included in different reasonable orders and still
      compile. Addresses part of ticket 32764.
    - Fix some parts of our code that were difficult for Coccinelle to
      parse. Related to ticket 31705.
    - Fix some small issues in our code that prevented automatic
      formatting tools from working. Addresses part of ticket 32764.

  o Documentation (manpage):
    - Alphabetize the Server and Directory server sections of the tor
      manpage. Also split Statistics options into their own section of
      the manpage. Closes ticket 33188. Work by Swati Thacker as part of
      Google Season of Docs.
    - Document the __OwningControllerProcess torrc option and specify
      its polling interval. Resolves issue 32971.
    - Split "Circuit Timeout" options and "Node Selection" options into
      their own sections of the tor manpage. Closes tickets 32928 and
      32929. Work by Swati Thacker as part of Google Season of Docs.
    - Alphabetize the Client Options section of the tor manpage. Closes
      ticket 32846.
    - Alphabetize the General Options section of the tor manpage. Closes
      ticket 32708.
    - In the tor(1) manpage, reword and improve formatting of the
      COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
      32277. Based on work by Swati Thacker as part of Google Season
      of Docs.
    - In the tor(1) manpage, reword and improve formatting of the FILES,
      SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
      Swati Thacker as part of Google Season of Docs.

  o Testing (Appveyor CI):
    - In our Appveyor Windows CI, copy required DLLs to test and app
      directories, before running tor's tests. This ensures that tor.exe
      and test*.exe use the correct version of each DLL. This fix is not
      required, but we hope it will avoid DLL search issues in future.
      Fixes bug 33673; bugfix on 0.3.4.2-alpha.
    - On Appveyor, skip the crypto/openssl_version test, which is
      failing because of a mismatched library installation. Fix
      for 33643.

  o Testing (circuit, EWMA):
    - Add unit tests for circuitmux and EWMA subsystems. Closes
      ticket 32196.

  o Testing (Travis CI):
    - Remove a redundant distcheck job. Closes ticket 33194.
    - Sort the Travis jobs in order of speed: putting the slowest jobs
      first takes full advantage of Travis job concurrency. Closes
      ticket 33194.
    - Stop allowing the Chutney IPv6 Travis job to fail. This job was
      previously configured to fast_finish (which requires
      allow_failure), to speed up the build. Closes ticket 33195.
    - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
      tool to produce detailed diagnostic output. Closes ticket 32792.

Revision 1.106: download - view: text, markup, annotated - select for diffs
Wed Mar 18 16:43:49 2020 UTC (4 years, 8 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2020Q1-base, pkgsrc-2020Q1
Diff to: previous 1.105: preferred, colored
Changes since revision 1.105: +5 -5 lines
tor: update to 0.4.2.7.

Changes in version 0.4.2.7 - 2020-03-18
  This is the third stable release in the 0.4.2.x series. It backports
  numerous fixes from later releases, including a fix for TROVE-2020-
  002, a major denial-of-service vulnerability that affected all
  released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
  an attacker could cause Tor instances to consume a huge amount of CPU,
  disrupting their operations for several seconds or minutes. This
  attack could be launched by anybody against a relay, or by a directory
  cache against any client that had connected to it. The attacker could
  launch this attack as much as they wanted, thereby disrupting service
  or creating patterns that could aid in traffic analysis. This issue
  was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.

  We do not have reason to believe that this attack is currently being
  exploited in the wild, but nonetheless we advise everyone to upgrade
  as soon as packages are available.

  o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
    - Fix a denial-of-service bug that could be used by anyone to
      consume a bunch of CPU on any Tor relay or authority, or by
      directories to consume a bunch of CPU on clients or hidden
      services. Because of the potential for CPU consumption to
      introduce observable timing patterns, we are treating this as a
      high-severity security issue. Fixes bug 33119; bugfix on
      0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
      as TROVE-2020-002 and CVE-2020-10592.

  o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
    - Avoid a remotely triggered memory leak in the case that a circuit
      padding machine is somehow negotiated twice on the same circuit.
      Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
      This is also tracked as TROVE-2020-004 and CVE-2020-10593.

  o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
    - Directory authorities will now send a 503 (not enough bandwidth)
      code to clients when under bandwidth pressure. Known relays and
      other authorities will always be answered regardless of the
      bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.

  o Minor features (continuous integration, backport from 0.4.3.2-alpha):
    - Stop allowing failures on the Travis CI stem tests job. It looks
      like all the stem hangs we were seeing before are now fixed.
      Closes ticket 33075.

  o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
    - Lowercase the configured value of BridgeDistribution before adding
      it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.

  o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
    - If we encounter a bug when flushing a buffer to a TLS connection,
      only log the bug once per invocation of the Tor process.
      Previously we would log with every occurrence, which could cause
      us to run out of disk space. Fixes bug 33093; bugfix
      on 0.3.2.2-alpha.

  o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
    - Fix an assertion failure that could result from a corrupted
      ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
      bugfix on 0.3.3.1-alpha. This issue is also tracked
      as TROVE-2020-003.

  o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
    - Fix a syntax warning given by newer versions of Rust that was
      creating problems for our continuous integration. Fixes bug 33212;
      bugfix on 0.3.5.1-alpha.

  o Testing (Travis CI, backport from 0.4.3.3-alpha):
    - Remove a redundant distcheck job. Closes ticket 33194.
    - Sort the Travis jobs in order of speed: putting the slowest jobs
      first takes full advantage of Travis job concurrency. Closes
      ticket 33194.
    - Stop allowing the Chutney IPv6 Travis job to fail. This job was
      previously configured to fast_finish (which requires
      allow_failure), to speed up the build. Closes ticket 33195.
    - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
      tool to produce detailed diagnostic output. Closes ticket 32792.

Revision 1.105: download - view: text, markup, annotated - select for diffs
Thu Jan 30 21:15:41 2020 UTC (4 years, 10 months ago) by leot
Branches: MAIN
Diff to: previous 1.104: preferred, colored
Changes since revision 1.104: +25 -1 lines
tor: Readd accidentally removed .crate in distinfo

XXX: It would be nice that `makesum' target do that independently of `rust'
XXX: option.

Revision 1.104: download - view: text, markup, annotated - select for diffs
Thu Jan 30 21:02:49 2020 UTC (4 years, 10 months ago) by leot
Branches: MAIN
Diff to: previous 1.103: preferred, colored
Changes since revision 1.103: +5 -29 lines
tor: Update to 0.4.2.6

Changes:
0.4.2.6
-------
  This is the second stable release in the 0.4.2.x series. It backports
  several bugfixes from 0.4.3.1-alpha, including some that had affected
  the Linux seccomp2 sandbox or Windows services. If you're running with
  one of those configurations, you'll probably want to upgrade;
  otherwise, you should be fine with 0.4.2.5.

  o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
    - Correct how we use libseccomp. Particularly, stop assuming that
      rules are applied in a particular order or that more rules are
      processed after the first match. Neither is the case! In
      libseccomp <2.4.0 this lead to some rules having no effect.
      libseccomp 2.4.0 changed how rules are generated, leading to a
      different ordering, which in turn led to a fatal crash during
      startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
      Peter Gerber.
    - Fix crash when reloading logging configuration while the
      experimental sandbox is enabled. Fixes bug 32841; bugfix on
      0.4.1.7. Patch by Peter Gerber.

  o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
    - Use GCC/Clang's printf-checking feature to make sure that
      tor_assertf() arguments are correctly typed. Fixes bug 32765;
      bugfix on 0.4.1.1-alpha.

  o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
    - Avoid a possible crash when trying to log a (fatal) assertion
      failure about mismatched magic numbers in configuration objects.
      Fixes bug 32771; bugfix on 0.4.2.1-alpha.

  o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
    - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
      test_practracker.sh script. Doing so caused a test failure. Fixes
      bug 32705; bugfix on 0.4.2.1-alpha.
    - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
      skipping practracker checks. Fixes bug 32705; bugfix
      on 0.4.2.1-alpha.

  o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
    - Initialize the publish/subscribe system when running as a windows
      service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.

  o Testing (backport from 0.4.3.1-alpha):
    - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
      Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
      fix the sandbox errors in 32722. Closes ticket 32240.
    - Re-enable the Travis CI macOS Chutney build, but don't let it
      prevent the Travis job from finishing. (The Travis macOS jobs are
      slow, so we don't want to have it delay the whole CI process.)
      Closes ticket 32629.

  o Testing (continuous integration, backport from 0.4.3.1-alpha):
    - Use zstd in our Travis Linux builds. Closes ticket 32242.

Revision 1.103: download - view: text, markup, annotated - select for diffs
Tue Dec 10 13:06:23 2019 UTC (4 years, 11 months ago) by ng0
Branches: MAIN
CVS tags: pkgsrc-2019Q4-base, pkgsrc-2019Q4
Diff to: previous 1.102: preferred, colored
Changes since revision 1.102: +5 -5 lines
Update net/tor to version 0.4.2.5

Changelog:

Changes in version 0.4.2.5 - 2019-12-09
  This is the first stable release in the 0.4.2.x series. This series
  improves reliability and stability, and includes several stability and
  correctness improvements for onion services. It also fixes many smaller
  bugs present in previous series.

  Per our support policy, we will support the 0.4.2.x series for nine
  months, or until three months after the release of a stable 0.4.3.x:
  whichever is longer. If you need longer-term support, please stick
  with 0.3.5.x, which will we plan to support until Feb 2022.

  Per our support policy, we will support the 0.4.2.x series for nine
  months, or until three months after the release of a stable 0.4.3.x:
  whichever is longer. If you need longer-term support, please stick
  with 0.3.5.x, which will we plan to support until Feb 2022.

  Below are the changes since 0.4.1.4-rc. For a complete list of changes
  since 0.4.1.5, see the ReleaseNotes file.

  o Minor features (geoip):
    - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
      Country database. Closes ticket 32685.

  o Testing:
    - Require C99 standards-conforming code in Travis CI, but allow GNU
      gcc extensions. Also activates clang's -Wtypedef-redefinition
      warnings. Build some jobs with -std=gnu99, and some jobs without.
      Closes ticket 32500.


Changes in version 0.4.2.4-rc - 2019-11-15
  Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
  several bugs from earlier versions, including a few that would result in
  stack traces or incorrect behavior.

  o Minor features (build system):
    - Make pkg-config use --prefix when cross-compiling, if
      PKG_CONFIG_PATH is not set. Closes ticket 32191.

  o Minor features (geoip):
    - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
      Country database. Closes ticket 32440.

  o Minor bugfixes (client, onion service v3):
    - Fix a BUG() assertion that occurs within a very small race window
      between when a client intro circuit opens and when its descriptor
      gets cleaned up from the cache. The circuit is now closed early,
      which will trigger a re-fetch of the descriptor and continue the
      connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (code quality):
    - Fix "make check-includes" so it runs correctly on out-of-tree
      builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (configuration):
    - Log the option name when skipping an obsolete option. Fixes bug
      32295; bugfix on 0.4.2.1-alpha.

  o Minor bugfixes (crash):
    - When running Tor with an option like --verify-config or
      --dump-config that does not start the event loop, avoid crashing
      if we try to exit early because of an error. Fixes bug 32407;
      bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (directory):
    - When checking if a directory connection is anonymous, test if the
      circuit was marked for close before looking at its channel. This
      avoids a BUG() stacktrace if the circuit was previously closed.
      Fixes bug 31958; bugfix on 0.4.2.1-alpha.

  o Minor bugfixes (shellcheck):
    - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
      32402; bugfix on 0.4.2.1-alpha.
    - Start checking most scripts for shellcheck errors again. Fixes bug
      32402; bugfix on 0.4.2.1-alpha.

  o Testing (continuous integration):
    - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
      recent version of coccinelle. But leave chutney on Ubuntu Trusty,
      until we can fix some Bionic permissions issues (see ticket
      32240). Related to ticket 31919.
    - Install the mingw OpenSSL package in Appveyor. This makes sure
      that the OpenSSL headers and libraries match in Tor's Appveyor
      builds. (This bug was triggered by an Appveyor image update.)
      Fixes bug 32449; bugfix on 0.3.5.6-rc.
    - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.


Changes in version 0.4.2.3-alpha - 2019-10-24
  This release fixes several bugs from the previous alpha release, and
  from earlier versions of Tor.

  o Major bugfixes (relay):
    - Relays now respect their AccountingMax bandwidth again. When
      relays entered "soft" hibernation (which typically starts when
      we've hit 90% of our AccountingMax), we had stopped checking
      whether we should enter hard hibernation. Soft hibernation refuses
      new connections and new circuits, but the existing circuits can
      continue, meaning that relays could have exceeded their configured
      AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.

  o Major bugfixes (v3 onion services):
    - Onion services now always use the exact number of intro points
      configured with the HiddenServiceNumIntroductionPoints option (or
      fewer if nodes are excluded). Before, a service could sometimes
      pick more intro points than configured. Fixes bug 31548; bugfix
      on 0.3.2.1-alpha.

  o Minor feature (onion services, control port):
    - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
      (v3) onion services. Previously it defaulted to RSA1024 (v2).
      Closes ticket 29669.

  o Minor features (testing):
    - When running tests that attempt to look up hostnames, replace the
      libc name lookup functions with ones that do not actually touch
      the network. This way, the tests complete more quickly in the
      presence of a slow or missing DNS resolver. Closes ticket 31841.

  o Minor features (testing, continuous integration):
    - Disable all but one Travis CI macOS build, to mitigate slow
      scheduling of Travis macOS jobs. Closes ticket 32177.
    - Run the chutney IPv6 networks as part of Travis CI. Closes
      ticket 30860.
    - Simplify the Travis CI build matrix, and optimise for build time.
      Closes ticket 31859.
    - Use Windows Server 2019 instead of Windows Server 2016 in our
      Appveyor builds. Closes ticket 32086.

  o Minor bugfixes (build system):
    - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
      32124; bugfix on 0.3.4.1-alpha.
    - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
      on 0.2.0.20-rc.
    - Stop failing when jemalloc is requested, but tcmalloc is not
      found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
    - When pkg-config is not installed, or a library that depends on
      pkg-config is not found, tell the user what to do to fix the
      problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.

  o Minor bugfixes (connections):
    - Avoid trying to read data from closed connections, which can cause
      needless loops in Libevent and infinite loops in Shadow. Fixes bug
      30344; bugfix on 0.1.1.1-alpha.

  o Minor bugfixes (error handling):
    - Always lock the backtrace buffer before it is used. Fixes bug
      31734; bugfix on 0.2.5.3-alpha.

  o Minor bugfixes (mainloop, periodic events, in-process API):
    - Reset the periodic events' "enabled" flag when Tor is shut down
      cleanly. Previously, this flag was left on, which caused periodic
      events not to be re-enabled when Tor was relaunched in-process
      with tor_api.h after a shutdown. Fixes bug 32058; bugfix
      on 0.3.3.1-alpha.

  o Minor bugfixes (process management):
    - Remove overly strict assertions that triggered when a pluggable
      transport failed to launch. Fixes bug 31091; bugfix
      on 0.4.0.1-alpha.
    - Remove an assertion in the Unix process backend. This assertion
      would trigger when we failed to find the executable for a child
      process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (testing):
    - Avoid intermittent test failures due to a test that had relied on
      inconsistent timing sources. Fixes bug 31995; bugfix
      on 0.3.1.3-alpha.
    - When testing port rebinding, don't busy-wait for tor to log.
      Instead, actually sleep for a short time before polling again.
      Also improve the formatting of control commands and log messages.
      Fixes bug 31837; bugfix on 0.3.5.1-alpha.

  o Minor bugfixes (tls, logging):
    - Log bugs about the TLS read buffer's length only once, rather than
      filling the logs with similar warnings. Fixes bug 31939; bugfix
      on 0.3.0.4-rc.

  o Minor bugfixes (v3 onion services):
    - Fix an implicit conversion from ssize_t to size_t discovered by
      Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
    - Fix a memory leak in an unlikely error code path when encoding HS
      DoS establish intro extension cell. Fixes bug 32063; bugfix
      on 0.4.2.1-alpha.
    - When cleaning up intro circuits for a v3 onion service, don't
      remove circuits that have an established or pending circuit, even
      if they ran out of retries. This way, we don't remove a circuit on
      its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.

  o Documentation:
    - Correct the description of "GuardLifetime". Fixes bug 31189;
      bugfix on 0.3.0.1-alpha.
    - Make clear in the man page, in both the bandwidth section and the
      AccountingMax section, that Tor counts in powers of two, not
      powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
      bytes. Resolves ticket 32106.


Changes in version 0.4.2.2-alpha - 2019-10-07
  This release fixes several bugs from the previous alpha release, and
  from earlier versions. It also includes a change in authorities, so
  that they begin to reject the currently unsupported release series.

  o Major features (directory authorities):
    - Directory authorities now reject relays running all currently
      deprecated release series. The currently supported release series
      are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.

  o Major bugfixes (embedded Tor):
    - Avoid a possible crash when restarting Tor in embedded mode and
      enabling a different set of publish/subscribe messages. Fixes bug
      31898; bugfix on 0.4.1.1-alpha.

  o Major bugfixes (torrc parsing):
    - Stop ignoring torrc options after an %include directive, when the
      included directory ends with a file that does not contain any
      config options (but does contain comments or whitespace). Fixes
      bug 31408; bugfix on 0.3.1.1-alpha.

  o Minor features (auto-formatting scripts):
    - When annotating C macros, never generate a line that our check-
      spaces script would reject. Closes ticket 31759.
    - When annotating C macros, try to remove cases of double-negation.
      Closes ticket 31779.

  o Minor features (continuous integration):
    - When building on Appveyor and Travis, pass the "-k" flag to make,
      so that we are informed of all compilation failures, not just the
      first one or two. Closes ticket 31372.

  o Minor features (geoip):
    - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
      Country database. Closes ticket 31931.

  o Minor features (maintenance scripts):
    - Add a Coccinelle script to detect bugs caused by incrementing or
      decrementing a variable inside a call to log_debug(). Since
      log_debug() is a macro whose arguments are conditionally
      evaluated, it is usually an error to do this. One such bug was
      30628, in which SENDME cells were miscounted by a decrement
      operator inside a log_debug() call. Closes ticket 30743.

  o Minor features (onion services v3):
    - Assist users who try to setup v2 client authorization in v3 onion
      services by pointing them to the right documentation. Closes
      ticket 28966.

  o Minor bugfixes (Appveyor continuous integration):
    - Avoid spurious errors when Appveyor CI fails before the install
      step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.

  o Minor bugfixes (best practices tracker):
    - When listing overbroad exceptions, do not also list problems, and
      do not list insufficiently broad exceptions. Fixes bug 31338;
      bugfix on 0.4.2.1-alpha.

  o Minor bugfixes (controller protocol):
    - Fix the MAPADDRESS controller command to accept one or more
      arguments. Previously, it required two or more arguments, and
      ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.

  o Minor bugfixes (logging):
    - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
      uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
    - Disable backtrace signal handlers when shutting down tor. Fixes
      bug 31614; bugfix on 0.2.5.2-alpha.
    - Rate-limit our the logging message about the obsolete .exit
      notation. Previously, there was no limit on this warning, which
      could potentially be triggered many times by a hostile website.
      Fixes bug 31466; bugfix on 0.2.2.1-alpha.
    - When initialising log domain masks, only set known log domains.
      Fixes bug 31854; bugfix on 0.2.1.1-alpha.

  o Minor bugfixes (logging, protocol violations):
    - Do not log a nonfatal assertion failure when receiving a VERSIONS
      cell on a connection using the obsolete v1 link protocol. Log a
      protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.

  o Minor bugfixes (modules):
    - Explain what the optional Directory Authority module is, and what
      happens when it is disabled. Fixes bug 31825; bugfix
      on 0.3.4.1-alpha.

  o Minor bugfixes (multithreading):
    - Avoid some undefined behaviour when freeing mutexes. Fixes bug
      31736; bugfix on 0.0.7.

  o Minor bugfixes (relay):
    - Avoid crashing when starting with a corrupt keys directory where
      the old ntor key and the new ntor key are identical. Fixes bug
      30916; bugfix on 0.2.4.8-alpha.

  o Minor bugfixes (tests, SunOS):
    - Avoid a map_anon_nofork test failure due to a signed/unsigned
      integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.

  o Code simplification and refactoring:
    - Refactor connection_control_process_inbuf() to reduce the size of
      a practracker exception. Closes ticket 31840.
    - Refactor the microdescs_parse_from_string() function into smaller
      pieces, for better comprehensibility. Closes ticket 31675.
    - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
      tests and fuzzers, rather than using hard-coded values. Closes
      ticket 31334.
    - Interface for function `decrypt_desc_layer` cleaned up. Closes
      ticket 31589.

  o Documentation:
    - Document the signal-safe logging behaviour in the tor man page.
      Also add some comments to the relevant functions. Closes
      ticket 31839.
    - Explain why we can't destroy the backtrace buffer mutex. Explain
      why we don't need to destroy the log mutex. Closes ticket 31736.
    - The Tor source code repository now includes a (somewhat dated)
      description of Tor's modular architecture, in doc/HACKING/design.
      This is based on the old "tor-guts.git" repository, which we are
      adopting and superseding. Closes ticket 31849.

Revision 1.102: download - view: text, markup, annotated - select for diffs
Sun Nov 24 18:42:16 2019 UTC (5 years ago) by ng0
Branches: MAIN
Diff to: previous 1.101: preferred, colored
Changes since revision 1.101: +25 -1 lines
net/tor: Add rust option to build the rust features in tor.

Revision 1.101: download - view: text, markup, annotated - select for diffs
Sat Sep 21 23:57:17 2019 UTC (5 years, 2 months ago) by alnsn
Branches: MAIN
CVS tags: pkgsrc-2019Q3-base, pkgsrc-2019Q3
Diff to: previous 1.100: preferred, colored
Changes since revision 1.100: +5 -5 lines
Update net/tor to version 0.4.1.6.

Notable changes in version 0.4.1.6 - 2019-09-19
  This release backports several bugfixes to improve stability and
  correctness.  Anyone experiencing build problems or crashes with 0.4.1.5,
  or experiencing reliability issues with single onion services, should
  upgrade.

  o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
    - Tolerate systems (including some Android installations) where
      madvise and MADV_DONTDUMP are available at build-time, but not at
      run time. Previously, these systems would notice a failed syscall
      and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
    - Tolerate systems (including some Linux installations) where
      madvise and/or MADV_DONTFORK are available at build-time, but not
      at run time. Previously, these systems would notice a failed
      syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.

  o Minor bugfixes (controller protocol):
    - Fix the MAPADDRESS controller command to accept one or more
      arguments. Previously, it required two or more arguments, and ignored
      the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.

  o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
    - When tor is missing descriptors for some primary entry guards,
      make the log message less alarming. It's normal for descriptors to
      expire, as long as tor fetches new ones soon after. Fixes bug
      31657; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
    - Change log level of message "Hash of session info was not as
      expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
      on 0.1.1.10-alpha.

  o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
    - Always retry v2 single onion service intro and rend circuits with
      a 3-hop path. Previously, v2 single onion services used a 3-hop
      path when rendezvous circuits were retried after a remote or
      delayed failure, but a 1-hop path for immediate retries. Fixes bug
      23818; bugfix on 0.2.9.3-alpha.

  o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
    - Always retry v3 single onion service intro and rend circuits with
      a 3-hop path. Previously, v3 single onion services used a 3-hop
      path when rend circuits were retried after a remote or delayed
      failure, but a 1-hop path for immediate retries. Fixes bug 23818;
      bugfix on 0.3.2.1-alpha.
    - Make v3 single onion services fall back to a 3-hop intro, when all
      intro points are unreachable via a 1-hop path. Previously, v3
      single onion services failed when all intro nodes were unreachable
      via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.

Revision 1.100: download - view: text, markup, annotated - select for diffs
Tue Aug 20 20:17:51 2019 UTC (5 years, 3 months ago) by wiz
Branches: MAIN
Diff to: previous 1.99: preferred, colored
Changes since revision 1.99: +5 -5 lines
tor: update to 0.4.1.5.

Changes in version 0.4.1.5 - 2019-08-20
  This is the first stable release in the 0.4.1.x series. This series
  adds experimental circuit-level padding, authenticated SENDME cells to
  defend against certain attacks, and several performance improvements
  to save on CPU consumption. It fixes bugs in bootstrapping and v3
  onion services. It also includes numerous smaller features and
  bugfixes on earlier versions.

Revision 1.99: download - view: text, markup, annotated - select for diffs
Fri May 3 08:45:51 2019 UTC (5 years, 7 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2019Q2-base, pkgsrc-2019Q2
Diff to: previous 1.98: preferred, colored
Changes since revision 1.98: +5 -6 lines
tor: update to 0.4.0.5.

Changes in version 0.4.0.5 - 2019-05-02
  This is the first stable release in the 0.4.0.x series. It contains
  improvements for power management and bootstrap reporting, as well as
  preliminary backend support for circuit padding to prevent some kinds
  of traffic analysis. It also continues our work in refactoring Tor for
  long-term maintainability.

  Per our support policy, we will support the 0.4.0.x series for nine
  months, or until three months after the release of a stable 0.4.1.x:
  whichever is longer. If you need longer-term support, please stick
  with 0.3.5.x, which will we plan to support until Feb 2022.

  Below are the changes since 0.3.5.7. For a complete list of changes
  since 0.4.0.4-rc, see the ChangeLog file.

  o Major features (battery management, client, dormant mode):
    - When Tor is running as a client, and it is unused for a long time,
      it can now enter a "dormant" state. When Tor is dormant, it avoids
      network and CPU activity until it is reawoken either by a user
      request or by a controller command. For more information, see the
      configuration options starting with "Dormant". Implements tickets
      2149 and 28335.
    - The client's memory of whether it is "dormant", and how long it
      has spent idle, persists across invocations. Implements
      ticket 28624.
    - There is a DormantOnFirstStartup option that integrators can use
      if they expect that in many cases, Tor will be installed but
      not used.

  o Major features (bootstrap reporting):
    - When reporting bootstrap progress, report the first connection
      uniformly, regardless of whether it's a connection for building
      application circuits. This allows finer-grained reporting of early
      progress than previously possible, with the improvements of ticket
      27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
    - When reporting bootstrap progress, treat connecting to a proxy or
      pluggable transport as separate from having successfully used that
      proxy or pluggable transport to connect to a relay. Closes tickets
      27100 and 28884.

  o Major features (circuit padding):
    - Implement preliminary support for the circuit padding portion of
      Proposal 254. The implementation supports Adaptive Padding (aka
      WTF-PAD) state machines for use between experimental clients and
      relays. Support is also provided for APE-style state machines that
      use probability distributions instead of histograms to specify
      inter-packet delay. At the moment, Tor does not provide any
      padding state machines that are used in normal operation: for now,
      this feature exists solely for experimentation. Closes
      ticket 28142.

  o Major features (refactoring):
    - Tor now uses an explicit list of its own subsystems when
      initializing and shutting down. Previously, these systems were
      managed implicitly in various places throughout the codebase.
      (There may still be some subsystems using the old system.) Closes
      ticket 28330.

  o Major bugfixes (cell scheduler, KIST, security):
    - Make KIST consider the outbuf length when computing what it can
      put in the outbuf. Previously, KIST acted as though the outbuf
      were empty, which could lead to the outbuf becoming too full. It
      is possible that an attacker could exploit this bug to cause a Tor
      client or relay to run out of memory and crash. Fixes bug 29168;
      bugfix on 0.3.2.1-alpha. This issue is also being tracked as
      TROVE-2019-001 and CVE-2019-8955.

  o Major bugfixes (networking):
    - Gracefully handle empty username/password fields in SOCKS5
      username/password auth messsage and allow SOCKS5 handshake to
      continue. Previously, we had rejected these handshakes, breaking
      certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.

  o Major bugfixes (NSS, relay):
    - When running with NSS, disable TLS 1.2 ciphersuites that use
      SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
      these ciphersuites don't work -- which caused relays to fail to
      handshake with one another when these ciphersuites were enabled.
      Fixes bug 29241; bugfix on 0.3.5.1-alpha.

  o Major bugfixes (windows, startup):
    - When reading a consensus file from disk, detect whether it was
      written in text mode, and re-read it in text mode if so. Always
      write consensus files in binary mode so that we can map them into
      memory later. Previously, we had written in text mode, which
      confused us when we tried to map the file on windows. Fixes bug
      28614; bugfix on 0.4.0.1-alpha.

  o Minor features (address selection):
    - Treat the subnet 100.64.0.0/10 as public for some purposes;
      private for others. This subnet is the RFC 6598 (Carrier Grade
      NAT) IP range, and is deployed by many ISPs as an alternative to
      RFC 1918 that does not break existing internal networks. Tor now
      blocks SOCKS and control ports on these addresses and warns users
      if client ports or ExtORPorts are listening on a RFC 6598 address.
      Closes ticket 28525. Patch by Neel Chauhan.

  o Minor features (bandwidth authority):
    - Make bandwidth authorities ignore relays that are reported in the
      bandwidth file with the flag "vote=0". This change allows us to
      report unmeasured relays for diagnostic reasons without including
      their bandwidth in the bandwidth authorities' vote. Closes
      ticket 29806.
    - When a directory authority is using a bandwidth file to obtain the
      bandwidth values that will be included in the next vote, serve
      this bandwidth file at /tor/status-vote/next/bandwidth. Closes
      ticket 21377.

  o Minor features (bootstrap reporting):
    - When reporting bootstrap progress, stop distinguishing between
      situations where only internal paths are available and situations
      where external paths are available. Previously, Tor would often
      erroneously report that it had only internal paths. Closes
      ticket 27402.

  o Minor features (compilation):
    - Compile correctly when OpenSSL is built with engine support
      disabled, or with deprecated APIs disabled. Closes ticket 29026.
      Patches from "Mangix".

  o Minor features (continuous integration):
    - On Travis Rust builds, cleanup Rust registry and refrain from
      caching the "target/" directory to speed up builds. Resolves
      issue 29962.
    - Log Python version during each Travis CI job. Resolves
      issue 28551.
    - In Travis, tell timelimit to use stem's backtrace signals, and
      launch python directly from timelimit, so python receives the
      signals from timelimit, rather than make. Closes ticket 30117.

  o Minor features (controller):
    - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
      Implements ticket 28843.

  o Minor features (developer tooling):
    - Check that bugfix versions in changes files look like Tor versions
      from the versions spec. Warn when bugfixes claim to be on a future
      release. Closes ticket 27761.
    - Provide a git pre-commit hook that disallows commiting if we have
      any failures in our code and changelog formatting checks. It is
      now available in scripts/maint/pre-commit.git-hook. Implements
      feature 28976.
    - Provide a git hook script to prevent "fixup!" and "squash!"
      commits from ending up in the master branch, as scripts/main/pre-
      push.git-hook. Closes ticket 27993.

  o Minor features (diagnostic):
    - Add more diagnostic log messages in an attempt to solve the issue
      of NUL bytes appearing in a microdescriptor cache. Related to
      ticket 28223.

  o Minor features (directory authority):
    - When a directory authority is using a bandwidth file to obtain
      bandwidth values, include the digest of that file in the vote.
      Closes ticket 26698.
    - Directory authorities support a new consensus algorithm, under
      which the family lines in microdescriptors are encoded in a
      canonical form. This change makes family lines more compressible
      in transit, and on the client. Closes ticket 28266; implements
      proposal 298.

  o Minor features (directory authority, relay):
    - Authorities now vote on a "StaleDesc" flag to indicate that a
      relay's descriptor is so old that the relay should upload again
      soon. Relays treat this flag as a signal to upload a new
      descriptor. This flag will eventually let us remove the
      'published' date from routerstatus entries, and make our consensus
      diffs much smaller. Closes ticket 26770; implements proposal 293.

  o Minor features (dormant mode):
    - Add a DormantCanceledByStartup option to tell Tor that it should
      treat a startup event as cancelling any previous dormant state.
      Integrators should use this option with caution: it should only be
      used if Tor is being started because of something that the user
      did, and not if Tor is being automatically started in the
      background. Closes ticket 29357.

  o Minor features (fallback directory mirrors):
    - Update the fallback whitelist based on operator opt-ins and opt-
      outs. Closes ticket 24805, patch by Phoul.

  o Minor features (FreeBSD):
    - On FreeBSD-based systems, warn relay operators if the
      "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
      Closes ticket 28518.

  o Minor features (geoip):
    - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
      Country database. Closes ticket 29992.

  o Minor features (HTTP standards compliance):
    - Stop sending the header "Content-type: application/octet-stream"
      along with transparently compressed documents: this confused
      browsers. Closes ticket 28100.

  o Minor features (IPv6):
    - We add an option ClientAutoIPv6ORPort, to make clients randomly
      prefer a node's IPv4 or IPv6 ORPort. The random preference is set
      every time a node is loaded from a new consensus or bridge config.
      We expect that this option will enable clients to bootstrap more
      quickly without having to determine whether they support IPv4,
      IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
    - When using addrs_in_same_network_family(), avoid choosing circuit
      paths that pass through the same IPv6 subnet more than once.
      Previously, we only checked IPv4 subnets. Closes ticket 24393.
      Patch by Neel Chauhan.

  o Minor features (log messages):
    - Improve log message in v3 onion services that could print out
      negative revision counters. Closes ticket 27707. Patch
      by "ffmancera".

  o Minor features (memory usage):
    - Save memory by storing microdescriptor family lists with a more
      compact representation. Closes ticket 27359.
    - Tor clients now use mmap() to read consensus files from disk, so
      that they no longer need keep the full text of a consensus in
      memory when parsing it or applying a diff. Closes ticket 27244.

  o Minor features (NSS, diagnostic):
    - Try to log an error from NSS (if there is any) and a more useful
      description of our situation if we are using NSS and a call to
      SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.

  o Minor features (parsing):
    - Directory authorities now validate that router descriptors and
      ExtraInfo documents are in a valid subset of UTF-8, and reject
      them if they are not. Closes ticket 27367.

  o Minor features (performance):
    - Cache the results of summarize_protocol_flags(), so that we don't
      have to parse the same protocol-versions string over and over.
      This should save us a huge number of malloc calls on startup, and
      may reduce memory fragmentation with some allocators. Closes
      ticket 27225.
    - Remove a needless memset() call from get_token_arguments, thereby
      speeding up the tokenization of directory objects by about 20%.
      Closes ticket 28852.
    - Replace parse_short_policy() with a faster implementation, to
      improve microdescriptor parsing time. Closes ticket 28853.
    - Speed up directory parsing a little by avoiding use of the non-
      inlined strcmp_len() function. Closes ticket 28856.
    - Speed up microdescriptor parsing by about 30%, to help improve
      startup time. Closes ticket 28839.

  o Minor features (pluggable transports):
    - Add support for emitting STATUS updates to Tor's control port from
      a pluggable transport process. Closes ticket 28846.
    - Add support for logging to Tor's logging subsystem from a
      pluggable transport process. Closes ticket 28180.

  o Minor features (process management):
    - Add a new process API for handling child processes. This new API
      allows Tor to have bi-directional communication with child
      processes on both Unix and Windows. Closes ticket 28179.
    - Use the subsystem manager to initialize and shut down the process
      module. Closes ticket 28847.

  o Minor features (relay):
    - When listing relay families, list them in canonical form including
      the relay's own identity, and try to give a more useful set of
      warnings. Part of ticket 28266 and proposal 298.

  o Minor features (required protocols):
    - Before exiting because of a missing required protocol, Tor will
      now check the publication time of the consensus, and not exit
      unless the consensus is newer than the Tor program's own release
      date. Previously, Tor would not check the consensus publication
      time, and so might exit because of a missing protocol that might
      no longer be required in a current consensus. Implements proposal
      297; closes ticket 27735.

  o Minor features (testing):
    - Treat all unexpected ERR and BUG messages as test failures. Closes
      ticket 28668.
    - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
      networks. Closes ticket 28840. Patch by Rob Jansen.
    - Use the approx_time() function when setting the "Expires" header
      in directory replies, to make them more testable. Needed for
      ticket 30001.

  o Minor bugfixes (security):
    - Fix a potential double free bug when reading huge bandwidth files.
      The issue is not exploitable in the current Tor network because
      the vulnerable code is only reached when directory authorities
      read bandwidth files, but bandwidth files come from a trusted
      source (usually the authorities themselves). Furthermore, the
      issue is only exploitable in rare (non-POSIX) 32-bit architectures,
      which are not used by any of the current authorities. Fixes bug
      30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
      Tobias Stoeckmann.
    - Verify in more places that we are not about to create a buffer
      with more than INT_MAX bytes, to avoid possible OOB access in the
      event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
      fixed by Tobias Stoeckmann.

  o Minor bugfix (continuous integration):
    - Reset coverage state on disk after Travis CI has finished. This
      should prevent future coverage merge errors from causing the test
      suite for the "process" subsystem to fail. The process subsystem
      was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
      on 0.2.9.15.
    - Terminate test-stem if it takes more than 9.5 minutes to run.
      (Travis terminates the job after 10 minutes of no output.)
      Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.

  o Minor bugfixes (build, compatibility, rust):
    - Update Cargo.lock file to match the version made by the latest
      version of Rust, so that "make distcheck" will pass again. Fixes
      bug 29244; bugfix on 0.3.3.4-alpha.

  o Minor bugfixes (C correctness):
    - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
      29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
      CID 1444119.

  o Minor bugfixes (client, clock skew):
    - Bootstrap successfully even when Tor's clock is behind the clocks
      on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
    - Select guards even if the consensus has expired, as long as the
      consensus is still reasonably live. Fixes bug 24661; bugfix
      on 0.3.0.1-alpha.

  o Minor bugfixes (compilation):
    - Fix compilation warnings in test_circuitpadding.c. Fixes bug
      29169; bugfix on 0.4.0.1-alpha.
    - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
      29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
    - Compile correctly on OpenBSD; previously, we were missing some
      headers required in order to detect it properly. Fixes bug 28938;
      bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.

  o Minor bugfixes (directory clients):
    - Mark outdated dirservers when Tor only has a reasonably live
      consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.

  o Minor bugfixes (directory mirrors):
    - Even when a directory mirror's clock is behind the clocks on the
      authorities, we now allow the mirror to serve "future"
      consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.

  o Minor bugfixes (DNS):
    - Gracefully handle an empty or absent resolve.conf file by falling
      back to using "localhost" as a DNS server (and hoping it works).
      Previously, we would just stop running as an exit. Fixes bug
      21900; bugfix on 0.2.1.10-alpha.

  o Minor bugfixes (documentation):
    - Describe the contents of the v3 onion service client authorization
      files correctly: They hold public keys, not private keys. Fixes
      bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".

  o Minor bugfixes (guards):
    - In count_acceptable_nodes(), the minimum number is now one bridge
      or guard node, and two non-guard nodes for a circuit. Previously,
      we had added up the sum of all nodes with a descriptor, but that
      could cause us to build failing circuits when we had either too
      many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
      0.3.6.1-alpha. Patch by Neel Chauhan.

  o Minor bugfixes (IPv6):
    - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
      IPv6 socket was bound using an address family of AF_INET instead
      of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
      Kris Katterjohn.

  o Minor bugfixes (linux seccomp sandbox):
    - Fix startup crash when experimental sandbox support is enabled.
      Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.

  o Minor bugfixes (logging):
    - Correct a misleading error message when IPv4Only or IPv6Only is
      used but the resolved address can not be interpreted as an address
      of the specified IP version. Fixes bug 13221; bugfix on
      0.2.3.9-alpha. Patch from Kris Katterjohn.
    - Log the correct port number for listening sockets when "auto" is
      used to let Tor pick the port number. Previously, port 0 was
      logged instead of the actual port number. Fixes bug 29144; bugfix
      on 0.3.5.1-alpha. Patch from Kris Katterjohn.
    - Stop logging a BUG() warning when Tor is waiting for exit
      descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
    - Avoid logging that we are relaxing a circuit timeout when that
      timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
    - Log more information at "warning" level when unable to read a
      private key; log more information at "info" level when unable to
      read a public key. We had warnings here before, but they were lost
      during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
    - Rework rep_hist_log_link_protocol_counts() to iterate through all
      link protocol versions when logging incoming/outgoing connection
      counts. Tor no longer skips version 5, and we won't have to
      remember to update this function when new link protocol version is
      developed. Fixes bug 28920; bugfix on 0.2.6.10.

  o Minor bugfixes (memory management):
    - Refactor the shared random state's memory management so that it
      actually takes ownership of the shared random value pointers.
      Fixes bug 29706; bugfix on 0.2.9.1-alpha.
    - Stop leaking parts of the shared random state in the shared-random
      unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.

  o Minor bugfixes (misc):
    - The amount of total available physical memory is now determined
      using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
      when it is defined and a 64-bit variant is not available. Fixes
      bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.

  o Minor bugfixes (networking):
    - Introduce additional checks into tor_addr_parse() to reject
      certain incorrect inputs that previously were not detected. Fixes
      bug 23082; bugfix on 0.2.0.10-alpha.

  o Minor bugfixes (onion service v3, client):
    - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
      connection waiting for a descriptor that we actually have in the
      cache. It turns out that this can actually happen, though it is
      rare. Now, tor will recover and retry the descriptor. Fixes bug
      28669; bugfix on 0.3.2.4-alpha.

  o Minor bugfixes (onion services):
    - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
      than one private key for a hidden service. Fixes bug 29040; bugfix
      on 0.3.5.1-alpha.
    - In hs_cache_store_as_client() log an HSDesc we failed to parse at
      "debug" level. Tor used to log it as a warning, which caused very
      long log lines to appear for some users. Fixes bug 29135; bugfix
      on 0.3.2.1-alpha.
    - Stop logging "Tried to establish rendezvous on non-OR circuit..."
      as a warning. Instead, log it as a protocol warning, because there
      is nothing that relay operators can do to fix it. Fixes bug 29029;
      bugfix on 0.2.5.7-rc.

  o Minor bugfixes (periodic events):
    - Refrain from calling routerlist_remove_old_routers() from
      check_descriptor_callback(). Instead, create a new hourly periodic
      event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (pluggable transports):
    - Make sure that data is continously read from standard output and
      standard error pipes of a pluggable transport child-process, to
      avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
      bugfix on 0.2.3.6-alpha.

  o Minor bugfixes (rust):
    - Abort on panic in all build profiles, instead of potentially
      unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (scheduler):
    - When re-adding channels to the pending list, check the correct
      channel's sched_heap_idx. This issue has had no effect in mainline
      Tor, but could have led to bugs down the road in improved versions
      of our circuit scheduling code. Fixes bug 29508; bugfix
      on 0.3.2.10.

  o Minor bugfixes (shellcheck):
    - Look for scripts in their correct locations during "make
      shellcheck". Previously we had looked in the wrong place during
      out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (single onion services):
    - Allow connections to single onion services to remain idle without
      being disconnected. Previously, relays acting as rendezvous points
      for single onion services were mistakenly closing idle rendezvous
      circuits after 60 seconds, thinking that they were unused
      directory-fetching circuits that had served their purpose. Fixes
      bug 29665; bugfix on 0.2.1.26.

  o Minor bugfixes (stats):
    - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
      relay and bridge extra-info documents. Fixes bug 29017; bugfix
      on 0.3.1.1-alpha.

  o Minor bugfixes (testing):
    - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
      recent test-network.sh to use new chutney features in CI. Fixes
      bug 29703; bugfix on 0.2.9.1-alpha.
    - Fix a test failure on Windows caused by an unexpected "BUG"
      warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
      on 0.2.9.3-alpha.
    - Downgrade some LOG_ERR messages in the address/* tests to
      warnings. The LOG_ERR messages were occurring when we had no
      configured network. We were failing the unit tests, because we
      backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
      29530; bugfix on 0.3.5.8.
    - Fix our gcov wrapper script to look for object files at the
      correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
    - Decrease the false positive rate of stochastic probability
      distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
    - Fix intermittent failures on an adaptive padding test. Fixes one
      case of bug 29122; bugfix on 0.4.0.1-alpha.
    - Disable an unstable circuit-padding test that was failing
      intermittently because of an ill-defined small histogram. Such
      histograms will be allowed again after 29298 is implemented. Fixes
      a second case of bug 29122; bugfix on 0.4.0.1-alpha.
    - Detect and suppress "bug" warnings from the util/time test on
      Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
    - Do not log an error-level message if we fail to find an IPv6
      network interface from the unit tests. Fixes bug 29160; bugfix
      on 0.2.7.3-rc.
    - Instead of relying on hs_free_all() to clean up all onion service
      objects in test_build_descriptors(), we now deallocate them one by
      one. This lets Coverity know that we are not leaking memory there
      and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
    - Check the time in the "Expires" header using approx_time(). Fixes
      bug 30001; bugfix on 0.4.0.4-rc.

  o Minor bugfixes (TLS protocol):
    - When classifying a client's selection of TLS ciphers, if the
      client ciphers are not yet available, do not cache the result.
      Previously, we had cached the unavailability of the cipher list
      and never looked again, which in turn led us to assume that the
      client only supported the ancient V1 link protocol. This, in turn,
      was causing Stem integration tests to stall in some cases. Fixes
      bug 30021; bugfix on 0.2.4.8-alpha.

  o Minor bugfixes (UI):
    - Lower log level of unlink() errors during bootstrap. Fixes bug
      29930; bugfix on 0.4.0.1-alpha.

  o Minor bugfixes (usability):
    - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
      Some users took this phrasing to mean that the mentioned guard was
      under their control or responsibility, which it is not. Fixes bug
      28895; bugfix on Tor 0.3.0.1-alpha.

  o Minor bugfixes (Windows, CI):
    - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
      Windows Server 2012 R2 job. The remaining 2 jobs still provide
      coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
      fast_finish, so failed jobs terminate the build immediately. Fixes
      bug 29601; bugfix on 0.3.5.4-alpha.

  o Code simplification and refactoring:
    - Introduce a connection_dir_buf_add() helper function that detects
      whether compression is in use, and adds a string accordingly.
      Resolves issue 28816.
    - Refactor handle_get_next_bandwidth() to use
      connection_dir_buf_add(). Implements ticket 29897.
    - Reimplement NETINFO cell parsing and generation to rely on
      trunnel-generated wire format handling code. Closes ticket 27325.
    - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
      ticket 28077.
    - Rework SOCKS wire format handling to rely on trunnel-generated
      parsing/generation code. Resolves ticket 27620.
    - Split out bootstrap progress reporting from control.c into a
      separate file. Part of ticket 27402.
    - The .may_include files that we use to describe our directory-by-
      directory dependency structure now describe a noncircular
      dependency graph over the directories that they cover. Our
      checkIncludes.py tool now enforces this noncircularity. Closes
      ticket 28362.

  o Documentation:
    - Clarify that Tor performs stream isolation among *Port listeners
      by default. Resolves issue 29121.
    - In the manpage entry describing MapAddress torrc setting, use
      example IP addresses from ranges specified for use in documentation
      by RFC 5737. Resolves issue 28623.
    - Mention that you cannot add a new onion service if Tor is already
      running with Sandbox enabled. Closes ticket 28560.
    - Improve ControlPort documentation. Mention that it accepts
      address:port pairs, and can be used multiple times. Closes
      ticket 28805.
    - Document the exact output of "tor --version". Closes ticket 28889.

  o Removed features:
    - Remove the old check-tor script. Resolves issue 29072.
    - Stop responding to the 'GETINFO status/version/num-concurring' and
      'GETINFO status/version/num-versioning' control port commands, as
      those were deprecated back in 0.2.0.30. Also stop listing them in
      output of 'GETINFO info/names'. Resolves ticket 28757.
    - The scripts used to generate and maintain the list of fallback
      directories have been extracted into a new "fallback-scripts"
      repository. Closes ticket 27914.

  o Testing:
    - Run shellcheck for scripts in the in scripts/ directory. Closes
      ticket 28058.
    - Add unit tests for tokenize_string() and get_next_token()
      functions. Resolves ticket 27625.

  o Code simplification and refactoring (onion service v3):
    - Consolidate the authorized client descriptor cookie computation
      code from client and service into one function. Closes
      ticket 27549.

  o Code simplification and refactoring (shell scripts):
    - Cleanup scan-build.sh to silence shellcheck warnings. Closes
      ticket 28007.
    - Fix issues that shellcheck found in chutney-git-bisect.sh.
      Resolves ticket 28006.
    - Fix issues that shellcheck found in updateRustDependencies.sh.
      Resolves ticket 28012.
    - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
    - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
    - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
    - Fix shellcheck warnings in scripts/test/coverage. Resolves
      issue 28008.

Revision 1.98: download - view: text, markup, annotated - select for diffs
Mon Mar 25 00:36:06 2019 UTC (5 years, 8 months ago) by gdt
Branches: MAIN
CVS tags: pkgsrc-2019Q1-base, pkgsrc-2019Q1
Diff to: previous 1.97: preferred, colored
Changes since revision 1.97: +2 -1 lines
net/tor: Add missing dependency to makefile

The upstream Makefile.in fails to express a dependency.  However,
instead of the usual situation where a -j1 build works and a parallel
build sometimes fails, the -j1 build reliably fails and a -j4 or -j10
occasionally works.

Revision 1.95.2.1: download - view: text, markup, annotated - select for diffs
Mon Mar 4 17:11:05 2019 UTC (5 years, 9 months ago) by bsiegert
Branches: pkgsrc-2018Q4
Diff to: previous 1.95: preferred, colored; next MAIN 1.96: preferred, colored
Changes since revision 1.95: +5 -5 lines
Pullup ticket #5919 - requested by leot
net/tor: security fix

Revisions pulled up:
- net/tor/Makefile                                              1.136-1.137
- net/tor/PLIST                                                 1.14
- net/tor/distinfo                                              1.96-1.97

---
   Module Name:    pkgsrc
   Committed By:   adam
   Date:           Tue Jan  8 08:39:55 UTC 2019

   Modified Files:
           pkgsrc/net/tor: Makefile PLIST distinfo

   Log Message:
   tor: updated to 0.3.5.7

   Changes in version 0.3.5.7:

   Tor 0.3.5.7 is the first stable release in its series; it includes
   compilation and portability fixes, and a fix for a severe problem
   affecting directory caches.

   The Tor 0.3.5 series includes several new features and performance
   improvements, including client authorization for v3 onion services,
   cleanups to bootstrap reporting, support for improved bandwidth-
   measurement tools, experimental support for NSS in place of OpenSSL,
   and much more. It also begins a full reorganization of Tor's code
   layout, for improved modularity and maintainability in the future.
   Finally, there is the usual set of performance improvements and
   bugfixes that we try to do in every release series.

   There are a couple of changes in the 0.3.5 that may affect
   compatibility. First, the default version for newly created onion
   services is now v3. Use the HiddenServiceVersion option if you want to
   override this. Second, some log messages related to bootstrapping have
   changed; if you use stem, you may need to update to the latest version
   so it will recognize them.

   We have designated 0.3.5 as a "long-term support" (LTS) series: we
   will continue to patch major bugs in typical configurations of 0.3.5
   until at least 1 Feb 2022. (We do not plan to provide long-term
   support for embedding, Rust support, NSS support, running a directory
   authority, or unsupported platforms. For these, you will need to stick
   with the latest stable release.)

---
   Module Name:    pkgsrc
   Committed By:   adam
   Date:           Fri Feb 22 08:47:51 UTC 2019

   Modified Files:
           pkgsrc/net/tor: Makefile distinfo

   Log Message:
   tor: updated to 0.3.5.8

   Changes in version 0.3.5.8:

   Tor 0.3.5.8 backports serveral fixes from later releases, including fixes
   for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
   releases.

   It also includes a fix for a medium-severity security bug affecting Tor
   0.3.2.1-alpha and later. All Tor instances running an affected release
   should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.

   o Major bugfixes (cell scheduler, KIST, security):
     - Make KIST consider the outbuf length when computing what it can
       put in the outbuf. Previously, KIST acted as though the outbuf
       were empty, which could lead to the outbuf becoming too full. It
       is possible that an attacker could exploit this bug to cause a Tor
       client or relay to run out of memory and crash. Fixes bug 29168;
       bugfix on 0.3.2.1-alpha. This issue is also being tracked as
       TROVE-2019-001 and CVE-2019-8955.

   o Major bugfixes (networking, backport from 0.4.0.2-alpha):
     - Gracefully handle empty username/password fields in SOCKS5
       username/password auth messsage and allow SOCKS5 handshake to
       continue. Previously, we had rejected these handshakes, breaking
       certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.

   o Minor features (compilation, backport from 0.4.0.2-alpha):
     - Compile correctly when OpenSSL is built with engine support
       disabled, or with deprecated APIs disabled. Closes ticket 29026.
       Patches from "Mangix".

   o Minor features (geoip):
     - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
       Country database. Closes ticket 29478.

   o Minor features (testing, backport from 0.4.0.2-alpha):
     - Treat all unexpected ERR and BUG messages as test failures. Closes
       ticket 28668.

   o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
     - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
       connection waiting for a descriptor that we actually have in the
       cache. It turns out that this can actually happen, though it is
       rare. Now, tor will recover and retry the descriptor. Fixes bug
       28669; bugfix on 0.3.2.4-alpha.

   o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
     - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
       IPv6 socket was bound using an address family of AF_INET instead
       of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
       Kris Katterjohn.

   o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
     - Update Cargo.lock file to match the version made by the latest
       version of Rust, so that "make distcheck" will pass again. Fixes
       bug 29244; bugfix on 0.3.3.4-alpha.

   o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
     - Select guards even if the consensus has expired, as long as the
       consensus is still reasonably live. Fixes bug 24661; bugfix
       on 0.3.0.1-alpha.

   o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
     - Compile correctly on OpenBSD; previously, we were missing some
       headers required in order to detect it properly. Fixes bug 28938;
       bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.terjohn.

   o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
     - Describe the contents of the v3 onion service client authorization
       files correctly: They hold public keys, not private keys. Fixes
       bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".

   o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
     - Rework rep_hist_log_link_protocol_counts() to iterate through all
       link protocol versions when logging incoming/outgoing connection
       counts. Tor no longer skips version 5, and we won't have to
       remember to update this function when new link protocol version is
       developed. Fixes bug 28920; bugfix on 0.2.6.10.

   o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
     - Log more information at "warning" level when unable to read a
       private key; log more information at "info" level when unable to
       read a public key. We had warnings here before, but they were lost
       during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.

   o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
     - The amount of total available physical memory is now determined
       using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
       when it is defined and a 64-bit variant is not available. Fixes
       bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.

   o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
     - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
       than one private key for a hidden service. Fixes bug 29040; bugfix
       on 0.3.5.1-alpha.
     - In hs_cache_store_as_client() log an HSDesc we failed to parse at
       "debug" level. Tor used to log it as a warning, which caused very
       long log lines to appear for some users. Fixes bug 29135; bugfix
       on 0.3.2.1-alpha.
     - Stop logging "Tried to establish rendezvous on non-OR circuit..."
       as a warning. Instead, log it as a protocol warning, because there
       is nothing that relay operators can do to fix it. Fixes bug 29029;
       bugfix on 0.2.5.7-rc.on 0.2.5.7-rc.

   o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
     - Mark outdated dirservers when Tor only has a reasonably live
       consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.

   o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
     - Detect and suppress "bug" warnings from the util/time test on
       Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
     - Do not log an error-level message if we fail to find an IPv6
       network interface from the unit tests. Fixes bug 29160; bugfix
       on 0.2.7.3-rc.

   o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
     - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
       Some users took this phrasing to mean that the mentioned guard was
       under their control or responsibility, which it is not. Fixes bug
       28895; bugfix on Tor 0.3.0.1-alpha.

Revision 1.97: download - view: text, markup, annotated - select for diffs
Fri Feb 22 08:47:51 2019 UTC (5 years, 9 months ago) by adam
Branches: MAIN
Diff to: previous 1.96: preferred, colored
Changes since revision 1.96: +5 -5 lines
tor: updated to 0.3.5.8

Changes in version 0.3.5.8:

Tor 0.3.5.8 backports serveral fixes from later releases, including fixes
for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
releases.

It also includes a fix for a medium-severity security bug affecting Tor
0.3.2.1-alpha and later. All Tor instances running an affected release
should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.

o Major bugfixes (cell scheduler, KIST, security):
  - Make KIST consider the outbuf length when computing what it can
    put in the outbuf. Previously, KIST acted as though the outbuf
    were empty, which could lead to the outbuf becoming too full. It
    is possible that an attacker could exploit this bug to cause a Tor
    client or relay to run out of memory and crash. Fixes bug 29168;
    bugfix on 0.3.2.1-alpha. This issue is also being tracked as
    TROVE-2019-001 and CVE-2019-8955.

o Major bugfixes (networking, backport from 0.4.0.2-alpha):
  - Gracefully handle empty username/password fields in SOCKS5
    username/password auth messsage and allow SOCKS5 handshake to
    continue. Previously, we had rejected these handshakes, breaking
    certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.

o Minor features (compilation, backport from 0.4.0.2-alpha):
  - Compile correctly when OpenSSL is built with engine support
    disabled, or with deprecated APIs disabled. Closes ticket 29026.
    Patches from "Mangix".

o Minor features (geoip):
  - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
    Country database. Closes ticket 29478.

o Minor features (testing, backport from 0.4.0.2-alpha):
  - Treat all unexpected ERR and BUG messages as test failures. Closes
    ticket 28668.

o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
  - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
    connection waiting for a descriptor that we actually have in the
    cache. It turns out that this can actually happen, though it is
    rare. Now, tor will recover and retry the descriptor. Fixes bug
    28669; bugfix on 0.3.2.4-alpha.

o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
  - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
    IPv6 socket was bound using an address family of AF_INET instead
    of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
    Kris Katterjohn.

o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  - Update Cargo.lock file to match the version made by the latest
    version of Rust, so that "make distcheck" will pass again. Fixes
    bug 29244; bugfix on 0.3.3.4-alpha.

o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
  - Select guards even if the consensus has expired, as long as the
    consensus is still reasonably live. Fixes bug 24661; bugfix
    on 0.3.0.1-alpha.

o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
  - Compile correctly on OpenBSD; previously, we were missing some
    headers required in order to detect it properly. Fixes bug 28938;
    bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.

o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
  - Describe the contents of the v3 onion service client authorization
    files correctly: They hold public keys, not private keys. Fixes
    bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".

o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
  - Rework rep_hist_log_link_protocol_counts() to iterate through all
    link protocol versions when logging incoming/outgoing connection
    counts. Tor no longer skips version 5, and we won't have to
    remember to update this function when new link protocol version is
    developed. Fixes bug 28920; bugfix on 0.2.6.10.

o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
  - Log more information at "warning" level when unable to read a
    private key; log more information at "info" level when unable to
    read a public key. We had warnings here before, but they were lost
    during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.

o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
  - The amount of total available physical memory is now determined
    using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
    when it is defined and a 64-bit variant is not available. Fixes
    bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.

o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
    than one private key for a hidden service. Fixes bug 29040; bugfix
    on 0.3.5.1-alpha.
  - In hs_cache_store_as_client() log an HSDesc we failed to parse at
    "debug" level. Tor used to log it as a warning, which caused very
    long log lines to appear for some users. Fixes bug 29135; bugfix
    on 0.3.2.1-alpha.
  - Stop logging "Tried to establish rendezvous on non-OR circuit..."
    as a warning. Instead, log it as a protocol warning, because there
    is nothing that relay operators can do to fix it. Fixes bug 29029;
    bugfix on 0.2.5.7-rc.

o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
  - Mark outdated dirservers when Tor only has a reasonably live
    consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.

o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
  - Detect and suppress "bug" warnings from the util/time test on
    Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
  - Do not log an error-level message if we fail to find an IPv6
    network interface from the unit tests. Fixes bug 29160; bugfix
    on 0.2.7.3-rc.

o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
  - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
    Some users took this phrasing to mean that the mentioned guard was
    under their control or responsibility, which it is not. Fixes bug
    28895; bugfix on Tor 0.3.0.1-alpha.

Revision 1.96: download - view: text, markup, annotated - select for diffs
Tue Jan 8 08:39:55 2019 UTC (5 years, 10 months ago) by adam
Branches: MAIN
Diff to: previous 1.95: preferred, colored
Changes since revision 1.95: +5 -5 lines
tor: updated to 0.3.5.7

Changes in version 0.3.5.7:

Tor 0.3.5.7 is the first stable release in its series; it includes
compilation and portability fixes, and a fix for a severe problem
affecting directory caches.

The Tor 0.3.5 series includes several new features and performance
improvements, including client authorization for v3 onion services,
cleanups to bootstrap reporting, support for improved bandwidth-
measurement tools, experimental support for NSS in place of OpenSSL,
and much more. It also begins a full reorganization of Tor's code
layout, for improved modularity and maintainability in the future.
Finally, there is the usual set of performance improvements and
bugfixes that we try to do in every release series.

There are a couple of changes in the 0.3.5 that may affect
compatibility. First, the default version for newly created onion
services is now v3. Use the HiddenServiceVersion option if you want to
override this. Second, some log messages related to bootstrapping have
changed; if you use stem, you may need to update to the latest version
so it will recognize them.

We have designated 0.3.5 as a "long-term support" (LTS) series: we
will continue to patch major bugs in typical configurations of 0.3.5
until at least 1 Feb 2022. (We do not plan to provide long-term
support for embedding, Rust support, NSS support, running a directory
authority, or unsupported platforms. For these, you will need to stick
with the latest stable release.)

Revision 1.95: download - view: text, markup, annotated - select for diffs
Tue Nov 6 19:32:30 2018 UTC (6 years ago) by adam
Branches: MAIN
CVS tags: pkgsrc-2018Q4-base
Branch point for: pkgsrc-2018Q4
Diff to: previous 1.94: preferred, colored
Changes since revision 1.94: +5 -5 lines
tor: updated to 0.3.4.9

Tor 0.3.4.9 is the second stable release in its series; it backports
numerous fixes, including a fix for a bandwidth management bug that
was causing memory exhaustion on relays. Anyone running an earlier
version of Tor 0.3.4.9 should upgrade.

o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
  - Fix compilation on ARM (and other less-used CPUs) when compiling
    with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.

o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
  - Make sure Tor bootstraps and works properly if only the
    ControlPort is set. Prior to this fix, Tor would only bootstrap
    when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
    port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.

o Major bugfixes (relay, backport from 0.3.5.3-alpha):
  - When our write bandwidth limit is exhausted, stop writing on the
    connection. Previously, we had a typo in the code that would make
    us stop reading instead, leading to relay connections being stuck
    indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
    on 0.3.4.1-alpha.

o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
  - Fix a use-after-free error that could be caused by passing Tor an
    impossible set of options that would fail during options_act().
    Fixes bug 27708; bugfix on 0.3.3.1-alpha.

o Minor features (continuous integration, backport from 0.3.5.1-alpha):
  - Don't do a distcheck with --disable-module-dirauth in Travis.
    Implements ticket 27252.
  - Only run one online rust build in Travis, to reduce network
    errors. Skip offline rust builds on Travis for Linux gcc, because
    they're redundant. Implements ticket 27252.
  - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
    duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
    Linux with default settings, because all the non-default builds
    use gcc on Linux. Implements ticket 27252.

o Minor features (continuous integration, backport from 0.3.5.3-alpha):
  - Use the Travis Homebrew addon to install packages on macOS during
    Travis CI. The package list is the same, but the Homebrew addon
    does not do a `brew update` by default. Implements ticket 27738.

o Minor features (geoip):
  - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
    Country database. Closes ticket 27991.

o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
  - Fix an integer overflow bug in our optimized 32-bit millisecond-
    difference algorithm for 32-bit Apple platforms. Previously, it
    would overflow when calculating the difference between two times
    more than 47 days apart. Fixes part of bug 27139; bugfix
    on 0.3.4.1-alpha.
  - Improve the precision of our 32-bit millisecond difference
    algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
    bugfix on 0.3.4.1-alpha.
  - Relax the tolerance on the mainloop/update_time_jumps test when
    running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
    on 0.3.4.1-alpha.

o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
  - Avoid undefined behavior in an end-of-string check when parsing
    the BEGIN line in a directory object. Fixes bug 28202; bugfix
    on 0.2.0.3-alpha.

o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
  - Only install the necessary mingw packages during our appveyor
    builds. This change makes the build a little faster, and prevents
    a conflict with a preinstalled mingw openssl that appveyor now
    ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.

o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
  - Rewrite our assertion macros so that they no longer suppress the
    compiler's -Wparentheses warnings. Fixes bug 27709; bugfix

o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
  - Stop reinstalling identical packages in our Windows CI. Fixes bug
    27464; bugfix on 0.3.4.1-alpha.

o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
  - Log additional info when we get a relay that shares an ed25519 ID
    with a different relay, instead making a BUG() warning. Fixes bug
    27800; bugfix on 0.3.2.1-alpha.

o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
  - Avoid a double-close when shutting down a stalled directory
    connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.

o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
  - Fix a bug warning when closing an HTTP tunnel connection due to an
    HTTP request we couldn't handle. Fixes bug 26470; bugfix
    on 0.3.2.1-alpha.

o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
  - Ensure circuitmux queues are empty before scheduling or sending
    padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.

o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
  - When the onion service directory can't be created or has the wrong
    permissions, do not log a stack trace. Fixes bug 27335; bugfix
    on 0.3.2.1-alpha.

o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
  - Close all SOCKS request (for the same .onion) if the newly fetched
    descriptor is unusable. Before that, we would close only the first
    one leaving the other hanging and let to time out by themselves.
    Fixes bug 27410; bugfix on 0.3.2.1-alpha.

o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  - When selecting a v3 rendezvous point, don't only look at the
    protover, but also check whether the curve25519 onion key is
    present. This way we avoid picking a relay that supports the v3
    rendezvous but for which we don't have the microdescriptor. Fixes
    bug 27797; bugfix on 0.3.2.1-alpha.

o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
  - Reject protocol names containing bytes other than alphanumeric
    characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
    on 0.2.9.4-alpha.

o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
  - Compute protover votes correctly in the rust version of the
    protover code. Previously, the protover rewrite in 24031 allowed
    repeated votes from the same voter for the same protocol version
    to be counted multiple times in protover_compute_vote(). Fixes bug
    27649; bugfix on 0.3.3.5-rc.
  - Reject protover names that contain invalid characters. Fixes bug
    27687; bugfix on 0.3.3.1-alpha.

o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
  - protover_all_supported() would attempt to allocate up to 16GB on
    some inputs, leading to a potential memory DoS. Fixes bug 27206;
    bugfix on 0.3.3.5-rc.

o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
  - Fix an API mismatch in the rust implementation of
    protover_compute_vote(). This bug could have caused crashes on any
    directory authorities running Tor with Rust (which we do not yet
    recommend). Fixes bug 27741; bugfix on 0.3.3.6.

o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
  - Fix a potential null dereference in protover_all_supported(). Add
    a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  - Return a string that can be safely freed by C code, not one
    created by the rust allocator, in protover_all_supported(). Fixes
    bug 27740; bugfix on 0.3.3.1-alpha.

o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
  - If a unit test running in a subprocess exits abnormally or with a
    nonzero status code, treat the test as having failed, even if the
    test reported success. Without this fix, memory leaks don't cause
    the tests to fail, even with LeakSanitizer. Fixes bug 27658;
    bugfix on 0.2.2.4-alpha.

o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
  - Make the hs_service tests use the same time source when creating
    the introduction point and when testing it. Now tests work better
    on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
    on 0.3.2.1-alpha.

o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
  - Treat backtrace test failures as expected on BSD-derived systems
    (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
    (FreeBSD failures have been treated as expected since 18204 in
    0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.

Revision 1.94: download - view: text, markup, annotated - select for diffs
Fri Oct 12 15:46:19 2018 UTC (6 years, 1 month ago) by adam
Branches: MAIN
Diff to: previous 1.93: preferred, colored
Changes since revision 1.93: +5 -5 lines
tor: updated to 0.3.4.8

Tor 0.3.4.8 is the first stable release in its series; it includes
compilation and portability fixes.

The Tor 0.3.4 series includes improvements for running Tor in
low-power and embedded environments, which should help performance in
general. We've begun work on better modularity, and included preliminary
changes on the directory authority side to accommodate a new bandwidth
measurement system.  We've also integrated more continuous-integration
systems into our development process, and made corresponding changes to
Tor's testing infrastructure.  Finally, we've continued to refine
our anti-denial-of-service code.

Below are the changes since 0.3.4.7-rc.  For a complete list of changes
since 0.3.3.9, see the ReleaseNotes file.

o Minor features (compatibility):
  - Tell OpenSSL to maintain backward compatibility with previous
    RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
    ciphers are disabled by default. Closes ticket 27344.

o Minor features (continuous integration):
  - Log the compiler path and version during Appveyor builds.
    Implements ticket 27449.
  - Show config.log and test-suite.log after failed Appveyor builds.
    Also upload the zipped full logs as a build artifact. Implements
    ticket 27430.

o Minor bugfixes (compilation):
  - Silence a spurious compiler warning on the GetAdaptersAddresses
    function pointer cast. This issue is already fixed by 26481 in
    0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
    bugfix on 0.2.3.11-alpha.
  - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
    supported, and always fails. Some compilers warn about the
    function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
    on 0.2.2.23-alpha.

o Minor bugfixes (continuous integration):
  - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
    August 29 2018, Appveyor images come with gcc 8.2.0 by default.
    Executables compiled for 64-bit Windows with this version of gcc
    crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
    27460; bugfix on 0.3.4.1-alpha.
  - When a Travis build fails, and showing a log fails, keep trying to
    show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  - When we use echo in Travis, don't pass a --flag as the first
    argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.

o Minor bugfixes (onion services):
  - Silence a spurious compiler warning in
    rend_client_send_introduction(). Fixes bug 27463; bugfix
    on 0.1.1.2-alpha.

o Minor bugfixes (testing, chutney):
  - When running make test-network-all, use the mixed+hs-v2 network.
    (A previous fix to chutney removed v3 onion services from the
    mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
    confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  - Before running make test-network-all, delete old logs and test
    result files, to avoid spurious failures. Fixes bug 27295; bugfix
    on 0.2.7.3-rc.

Revision 1.93: download - view: text, markup, annotated - select for diffs
Tue Jul 17 06:14:04 2018 UTC (6 years, 4 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2018Q3-base, pkgsrc-2018Q3
Diff to: previous 1.92: preferred, colored
Changes since revision 1.92: +5 -5 lines
tor: update to 0.3.3.9.

Changes in version 0.3.3.9 - 2018-07-13
  Tor 0.3.3.9 moves to a new bridge authority, meaning people running
  bridge relays should upgrade.

  o Directory authority changes:
    - The "Bifroest" bridge authority has been retired; the new bridge
      authority is "Serge", and it is operated by George from the
      TorBSD project. Closes ticket 26771.

Revision 1.92: download - view: text, markup, annotated - select for diffs
Fri Jul 13 15:26:32 2018 UTC (6 years, 4 months ago) by adam
Branches: MAIN
Diff to: previous 1.91: preferred, colored
Changes since revision 1.91: +5 -5 lines
tor: updated to 0.3.3.8

Changes in version 0.3.3.8:
  Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
  fixes for a memory leak affecting directory authorities.

  o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
    - Stop leaking memory on directory authorities when planning to
      vote. This bug was crashing authorities by exhausting their
      memory. Fixes bug 26435; bugfix on 0.3.3.6.

  o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
    - Make sure that failing tests in Rust will actually cause the build
      to fail: previously, they were ignored. Fixes bug 26258; bugfix
      on 0.3.3.4-alpha.

  o Minor features (compilation, backport from 0.3.4.4-rc):
    - When building Tor, prefer to use Python 3 over Python 2, and more
      recent (contemplated) versions over older ones. Closes
      ticket 26372.

  o Minor features (geoip):
    - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
      Country database. Closes ticket 26674.

  o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
    - Add several checks to detect whether Tor relays are uploading
      their descriptors without specifying why they regenerated them.
      Diagnostic for ticket 25686.

  o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
    - Don't count path selection failures as circuit build failures.
      This change should eliminate cases where Tor blames its guard or
      the network for situations like insufficient microdescriptors
      and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
      on 0.3.3.1-alpha.

  o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
    - Fix a compilation warning on some versions of GCC when building
      code that calls routerinfo_get_my_routerinfo() twice, assuming
      that the second call will succeed if the first one did. Fixes bug
      26269; bugfix on 0.2.8.2-alpha.

  o Minor bugfixes (control port, backport from 0.3.4.4-rc):
    - Handle the HSADDRESS= argument to the HSPOST command properly.
      (Previously, this argument was misparsed and thus ignored.) Fixes
      bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".

  o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
    - Fix a number of small memory leaks identified by coverity. Fixes
      bug 26467; bugfix on numerous Tor versions.

  o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
    - Relays now correctly block attempts to re-extend to the previous
      relay by Ed25519 identity. Previously they would warn in this
      case, but not actually reject the attempt. Fixes bug 26158; bugfix
      on 0.3.0.1-alpha.

  o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
    - When shutting down, Tor now clears all the flags in the control.c
      module. This should prevent a bug where authentication cookies are
      not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
    - When running the hs_ntor_ref.py test, make sure only to pass
      strings (rather than "bytes" objects) to the Python subprocess
      module. Python 3 on Windows seems to require this. Fixes bug
      26535; bugfix on 0.3.1.1-alpha.
    - When running the ntor_ref.py test, make sure only to pass strings
      (rather than "bytes" objects) to the Python subprocess module.
      Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
      on 0.2.5.5-alpha.

Revision 1.91: download - view: text, markup, annotated - select for diffs
Sun Jun 17 08:29:11 2018 UTC (6 years, 5 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2018Q2-base, pkgsrc-2018Q2
Diff to: previous 1.90: preferred, colored
Changes since revision 1.90: +5 -5 lines
tor: update to 0.3.3.7.

Changes in version 0.3.3.7 - 2018-06-12
  Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
  fixes for bugs affecting compatibility and stability.

  o Directory authority changes:
    - Add an IPv6 address for the "dannenberg" directory authority.
      Closes ticket 26343.

  o Minor features (geoip):
    - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
      Country database. Closes ticket 26351.

  o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
    - Work around a change in OpenSSL 1.1.1 where return values that
      would previously indicate "no password" now indicate an empty
      password. Without this workaround, Tor instances running with
      OpenSSL 1.1.1 would accept descriptors that other Tor instances
      would reject. Fixes bug 26116; bugfix on 0.2.5.16.

  o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
    - Silence unused-const-variable warnings in zstd.h with some GCC
      versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.

  o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
    - Improve accuracy of the BUILDTIMEOUT_SET control port event's
      TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
      miscounting the total number of circuits for these field values.)
      Fixes bug 26121; bugfix on 0.3.3.1-alpha.

  o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
    - Prevent a possible out-of-bounds smartlist read in
      protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.

  o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
    - Only select relays when they have the descriptors we prefer to use
      for them. This change fixes a bug where we could select a relay
      because it had _some_ descriptor, but reject it later with a
      nonfatal assertion error because it didn't have the exact one we
      wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.

Revision 1.90: download - view: text, markup, annotated - select for diffs
Wed May 23 06:19:52 2018 UTC (6 years, 6 months ago) by wiz
Branches: MAIN
Diff to: previous 1.89: preferred, colored
Changes since revision 1.89: +5 -5 lines
tor: update to 0.3.3.6.

Changes in version 0.3.3.6 - 2018-05-22
  Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
  backports several important fixes from the 0.3.4.1-alpha.

  The Tor 0.3.3 series includes controller support and other
  improvements for v3 onion services, official support for embedding Tor
  within other applications, and our first non-trivial module written in
  the Rust programming language. (Rust is still not enabled by default
  when building Tor.) And as usual, there are numerous other smaller
  bugfixes, features, and improvements.

  Below are the changes since 0.3.2.10. For a list of only the changes
  since 0.3.3.5-rc, see the ChangeLog file.

  o New system requirements:
    - When built with Rust, Tor now depends on version 0.2.39 of the
      libc crate. Closes tickets 25310 and 25664.

  o Major features (embedding):
    - There is now a documented stable API for programs that need to
      embed Tor. See tor_api.h for full documentation and known bugs.
      Closes ticket 23684.
    - Tor now has support for restarting in the same process.
      Controllers that run Tor using the "tor_api.h" interface can now
      restart Tor after Tor has exited. This support is incomplete,
      however: we fixed crash bugs that prevented it from working at
      all, but many bugs probably remain, including a possibility of
      security issues. Implements ticket 24581.

  o Major features (IPv6, directory documents):
    - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
      consensus. This information makes it easier for IPv6 clients to
      bootstrap and choose reachable entry guards. Implements
      ticket 23826.
    - Add consensus method 28, which removes IPv6 ORPorts from
      microdescriptors. Now that the consensus contains IPv6 ORPorts,
      they are redundant in microdescs. This change will be used by Tor
      clients on 0.2.8.x and later. (That is to say, with all Tor
      clients that have IPv6 bootstrap and guard support.) Implements
      ticket 23828.
    - Expand the documentation for AuthDirHasIPv6Connectivity when it is
      set by different numbers of authorities. Fixes 23870
      on 0.2.4.1-alpha.

  o Major features (onion service v3, control port):
    - The control port now supports commands and events for v3 onion
      services. It is now possible to create ephemeral v3 services using
      ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
      CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
      DEL_ONION) have been extended to support v3 onion services. Closes
      ticket 20699; implements proposal 284.

  o Major features (onion services):
    - Provide torrc options to pin the second and third hops of onion
      service circuits to a list of nodes. The option HSLayer2Guards
      pins the second hop, and the option HSLayer3Guards pins the third
      hop. These options are for use in conjunction with experiments
      with "vanguards" for preventing guard enumeration attacks. Closes
      ticket 13837.
    - When v3 onion service clients send introduce cells, they now
      include the IPv6 address of the rendezvous point, if it has one.
      Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
      in future Tor versions, IPv6-only v3 single onion services will be
      able to use IPv6 addresses to connect directly to the rendezvous
      point. Closes ticket 23577. Patch by Neel Chauhan.

  o Major features (relay):
    - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
      operator to use a more reasonable ("reduced") exit policy, rather
      than the default one. If you want to run an exit node without
      thinking too hard about which ports to allow, this one is for you.
      Closes ticket 13605. Patch from Neel Chauhan.

  o Major features (rust, portability, experimental):
    - Tor now ships with an optional implementation of one of its
      smaller modules (protover.c) in the Rust programming language. To
      try it out, install a Rust build environment, and configure Tor
      with "--enable-rust --enable-cargo-online-mode". This should not
      cause any user-visible changes, but should help us gain more
      experience with Rust, and plan future Rust integration work.
      Implementation by Chelsea Komlo. Closes ticket 22840.

  o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
    - When directory authorities read a zero-byte bandwidth file, they
      would previously log a warning with the contents of an
      uninitialised buffer. They now log a warning about the empty file
      instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.

  o Major bugfixes (security, directory authority, denial-of-service):
    - Fix a bug that could have allowed an attacker to force a directory
      authority to use up all its RAM by passing it a maliciously
      crafted protocol versions string. Fixes bug 25517; bugfix on
      0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.

  o Major bugfixes (crash, backport from 0.3.4.1-alpha):
    - Avoid a rare assertion failure in the circuit build timeout code
      if we fail to allow any circuits to actually complete. Fixes bug
      25733; bugfix on 0.2.2.2-alpha.

  o Major bugfixes (netflow padding):
    - Stop adding unneeded channel padding right after we finish
      flushing to a connection that has been trying to flush for many
      seconds. Instead, treat all partial or complete flushes as
      activity on the channel, which will defer the time until we need
      to add padding. This fix should resolve confusing and scary log
      messages like "Channel padding timeout scheduled 221453ms in the
      past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.

  o Major bugfixes (networking):
    - Tor will no longer reject IPv6 address strings from Tor Browser
      when they are passed as hostnames in SOCKS5 requests. Fixes bug
      25036, bugfix on Tor 0.3.1.2.

  o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
    - Correctly detect when onion services get disabled after HUP. Fixes
      bug 25761; bugfix on 0.3.2.1.

  o Major bugfixes (performance, load balancing):
    - Directory authorities no longer vote in favor of the Guard flag
      for relays without directory support. Starting in Tor
      0.3.0.1-alpha, clients have been avoiding using such relays in the
      Guard position, leading to increasingly broken load balancing for
      the 5%-or-so of Guards that don't advertise directory support.
      Fixes bug 22310; bugfix on 0.3.0.6.

  o Major bugfixes (relay):
    - If we have failed to connect to a relay and received a connection
      refused, timeout, or similar error (at the TCP level), do not try
      that same address/port again for 60 seconds after the failure has
      occurred. Fixes bug 24767; bugfix on 0.0.6.

  o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
    - Impose a limit on circuit cell queue size. The limit can be
      controlled by a consensus parameter. Fixes bug 25226; bugfix
      on 0.2.4.14-alpha.

  o Minor features (cleanup):
    - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
      when it stops. Closes ticket 23271.

  o Minor features (compatibility, backport from 0.3.4.1-alpha):
    - Avoid some compilation warnings with recent versions of LibreSSL.
      Closes ticket 26006.

  o Minor features (config options):
    - Change the way the default value for MaxMemInQueues is calculated.
      We now use 40% of the hardware RAM if the system has 8 GB RAM or
      more. Otherwise we use the former value of 75%. Closes
      ticket 24782.

  o Minor features (continuous integration):
    - Update the Travis CI configuration to use the stable Rust channel,
      now that we have decided to require that. Closes ticket 25714.

  o Minor features (continuous integration, backport from 0.3.4.1-alpha):
    - Our .travis.yml configuration now includes support for testing the
      results of "make distcheck". (It's not uncommon for "make check"
      to pass but "make distcheck" to fail.) Closes ticket 25814.
    - Our Travis CI configuration now integrates with the Coveralls
      coverage analysis tool. Closes ticket 25818.

  o Minor features (defensive programming):
    - Most of the functions in Tor that free objects have been replaced
      with macros that free the objects and set the corresponding
      pointers to NULL. This change should help prevent a large class of
      dangling pointer bugs. Closes ticket 24337.
    - Where possible, the tor_free() macro now only evaluates its input
      once. Part of ticket 24337.
    - Check that microdesc ed25519 ids are non-zero in
      node_get_ed25519_id() before returning them. Implements ticket
      24001, patch by "aruna1234".

  o Minor features (directory authority):
    - When directory authorities are unable to add signatures to a
      pending consensus, log the reason why. Closes ticket 24849.

  o Minor features (embedding):
    - Tor can now start with a preauthenticated control connection
      created by the process that launched it. This feature is meant for
      use by programs that want to launch and manage a Tor process
      without allowing other programs to manage it as well. For more
      information, see the __OwningControllerFD option documented in
      control-spec.txt. Closes ticket 23900.
    - On most errors that would cause Tor to exit, it now tries to
      return from the tor_main() function, rather than calling the
      system exit() function. Most users won't notice a difference here,
      but it should be significant for programs that run Tor inside a
      separate thread: they should now be able to survive Tor's exit
      conditions rather than having Tor shut down the entire process.
      Closes ticket 23848.
    - Applications that want to embed Tor can now tell Tor not to
      register any of its own POSIX signal handlers, using the
      __DisableSignalHandlers option. Closes ticket 24588.

  o Minor features (fallback directory list):
    - Avoid selecting fallbacks that change their IP addresses too
      often. Select more fallbacks by ignoring the Guard flag, and
      allowing lower cutoffs for the Running and V2Dir flags. Also allow
      a lower bandwidth, and a higher number of fallbacks per operator
      (5% of the list). Implements ticket 24785.
    - Update the fallback whitelist and blacklist based on opt-ins and
      relay changes. Closes tickets 22321, 24678, 22527, 24135,
      and 24695.

  o Minor features (fallback directory mirror configuration):
    - Add a nickname to each fallback in a C comment. This makes it
      easier for operators to find their relays, and allows stem to use
      nicknames to identify fallbacks. Implements ticket 24600.
    - Add a type and version header to the fallback directory mirror
      file. Also add a delimiter to the end of each fallback entry. This
      helps external parsers like stem and Relay Search. Implements
      ticket 24725.
    - Add an extrainfo cache flag for each fallback in a C comment. This
      allows stem to use fallbacks to fetch extra-info documents, rather
      than using authorities. Implements ticket 22759.
    - Add the generateFallbackDirLine.py script for automatically
      generating fallback directory mirror lines from relay fingerprints.
      No more typos! Add the lookupFallbackDirContact.py script for
      automatically looking up operator contact info from relay
      fingerprints. Implements ticket 24706, patch by teor and atagar.
    - Reject any fallback directory mirror that serves an expired
      consensus. Implements ticket 20942, patch by "minik".
    - Remove commas and equals signs from external string inputs to the
      fallback list. This avoids format confusion attacks. Implements
      ticket 24726.
    - Remove the "weight=10" line from fallback directory mirror
      entries. Ticket 24681 will maintain the current fallback weights
      by changing Tor's default fallback weight to 10. Implements
      ticket 24679.
    - Stop logging excessive information about fallback netblocks.
      Implements ticket 24791.

  o Minor features (forward-compatibility):
    - If a relay supports some link authentication protocol that we do
      not recognize, then include that relay's ed25519 key when telling
      other relays to extend to it. Previously, we treated future
      versions as if they were too old to support ed25519 link
      authentication. Closes ticket 20895.

  o Minor features (geoip):
    - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
      database. Closes ticket 26104.

  o Minor features (heartbeat):
    - Add onion service information to our heartbeat logs, displaying
      stats about the activity of configured onion services. Closes
      ticket 24896.

  o Minor features (instrumentation, development):
    - Add the MainloopStats option to allow developers to get
      instrumentation information from the main event loop via the
      heartbeat messages. We hope to use this to improve Tor's behavior
      when it's trying to sleep. Closes ticket 24605.

  o Minor features (IPv6):
    - Make IPv6-only clients wait for microdescs for relays, even if we
      were previously using descriptors (or were using them as a bridge)
      and have a cached descriptor for them. Implements ticket 23827.
    - When a consensus has IPv6 ORPorts, make IPv6-only clients use
      them, rather than waiting to download microdescriptors. Implements
      ticket 23827.

  o Minor features (log messages):
    - Improve log message in the out-of-memory handler to include
      information about memory usage from the different compression
      backends. Closes ticket 25372.
    - Improve a warning message that happens when we fail to re-parse an
      old router because of an expired certificate. Closes ticket 20020.
    - Make the log more quantitative when we hit MaxMemInQueues
      threshold exposing some values. Closes ticket 24501.

  o Minor features (logging):
    - Clarify the log messages produced when getrandom() or a related
      entropy-generation mechanism gives an error. Closes ticket 25120.
    - Added support for the Android logging subsystem. Closes
      ticket 24362.

  o Minor features (performance):
    - Support predictive circuit building for onion service circuits
      with multiple layers of guards. Closes ticket 23101.
    - Use stdatomic.h where available, rather than mutexes, to implement
      atomic_counter_t. Closes ticket 23953.

  o Minor features (performance, 32-bit):
    - Improve performance on 32-bit systems by avoiding 64-bit division
      when calculating the timestamp in milliseconds for channel padding
      computations. Implements ticket 24613.
    - Improve performance on 32-bit systems by avoiding 64-bit division
      when timestamping cells and buffer chunks for OOM calculations.
      Implements ticket 24374.

  o Minor features (performance, OSX, iOS):
    - Use the mach_approximate_time() function (when available) to
      implement coarse monotonic time. Having a coarse time function
      should avoid a large number of system calls, and improve
      performance slightly, especially under load. Closes ticket 24427.

  o Minor features (performance, windows):
    - Improve performance on Windows Vista and Windows 7 by adjusting
      TCP send window size according to the recommendation from
      SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
      from Vort.

  o Minor features (sandbox):
    - Explicitly permit the poll() system call when the Linux
      seccomp2-based sandbox is enabled: apparently, some versions of
      libc use poll() when calling getpwnam(). Closes ticket 25313.

  o Minor features (storage, configuration):
    - Users can store cached directory documents somewhere other than
      the DataDirectory by using the CacheDirectory option. Similarly,
      the storage location for relay's keys can be overridden with the
      KeyDirectory option. Closes ticket 22703.

  o Minor features (testing):
    - Add a "make test-rust" target to run the rust tests only. Closes
      ticket 25071.

  o Minor features (testing, debugging, embedding):
    - For development purposes, Tor now has a mode in which it runs for
      a few seconds, then stops, and starts again without exiting the
      process. This mode is meant to help us debug various issues with
      ticket 23847. To use this feature, compile with
      --enable-restart-debugging, and set the TOR_DEBUG_RESTART
      environment variable. This is expected to crash a lot, and is
      really meant for developers only. It will likely be removed in a
      future release. Implements ticket 24583.

  o Minor bugfixes (build, rust):
    - Fix output of autoconf checks to display success messages for Rust
      dependencies and a suitable rustc compiler version. Fixes bug
      24612; bugfix on 0.3.1.3-alpha.
    - Don't pass the --quiet option to cargo: it seems to suppress some
      errors, which is not what we want to do when building. Fixes bug
      24518; bugfix on 0.3.1.7.
    - Build correctly when building from outside Tor's source tree with
      the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
      on 0.3.1.7.

  o Minor bugfixes (C correctness):
    - Fix a very unlikely (impossible, we believe) null pointer
      dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
      Coverity; this is CID 1430932.

  o Minor bugfixes (channel, client):
    - Better identify client connection when reporting to the geoip
      client cache. Fixes bug 24904; bugfix on 0.3.1.7.

  o Minor bugfixes (circuit, cannibalization):
    - Don't cannibalize preemptively-built circuits if we no longer
      recognize their first hop. This situation can happen if our Guard
      relay went off the consensus after the circuit was created. Fixes
      bug 24469; bugfix on 0.0.6.

  o Minor bugfixes (client, backport from 0.3.4.1-alpha):
    - Don't consider Tor running as a client if the ControlPort is open,
      but no actual client ports are open. Fixes bug 26062; bugfix
      on 0.2.9.4-alpha.

  o Minor bugfixes (compilation):
    - Fix a C99 compliance issue in our configuration script that caused
      compilation issues when compiling Tor with certain versions of
      xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.

  o Minor bugfixes (controller):
    - Restore the correct operation of the RESOLVE command, which had
      been broken since we added the ability to enable/disable DNS on
      specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
    - Avoid a (nonfatal) assertion failure when extending a one-hop
      circuit from the controller to become a multihop circuit. Fixes
      bug 24903; bugfix on 0.2.5.2-alpha.

  o Minor bugfixes (correctness):
    - Remove a nonworking, unnecessary check to see whether a circuit
      hop's identity digest was set when the circuit failed. Fixes bug
      24927; bugfix on 0.2.4.4-alpha.

  o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
    - Upon receiving a malformed connected cell, stop processing the
      cell immediately. Previously we would mark the connection for
      close, but continue processing the cell as if the connection were
      open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.

  o Minor bugfixes (directory authorities, IPv6):
    - When creating a routerstatus (vote) from a routerinfo (descriptor),
      set the IPv6 address to the unspecified IPv6 address, and
      explicitly initialize the port to zero. Fixes bug 24488; bugfix
      on 0.2.4.1-alpha.

  o Minor bugfixes (documentation):
    - Document that the PerConnBW{Rate,Burst} options will fall back to
      their corresponding consensus parameters only if those parameters
      are set. Previously we had claimed that these values would always
      be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.

  o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
    - Stop saying in the manual that clients cache ipv4 dns answers from
      exit relays. We haven't used them since 0.2.6.3-alpha, and in
      ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
      we forgot to say so in the man page. Fixes bug 26052; bugfix
      on 0.3.2.6-alpha.

  o Minor bugfixes (exit relay DNS retries):
    - Re-attempt timed-out DNS queries 3 times before failure, since our
      timeout is 5 seconds for them, but clients wait 10-15. Also allow
      slightly more timeouts per resolver when an exit has multiple
      resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.

  o Minor bugfixes (fallback directory mirrors):
    - Make updateFallbackDirs.py search harder for python. (Some OSs
      don't put it in /usr/bin.) Fixes bug 24708; bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
    - When hibernating, close connections normally and allow them to
      flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
      bug 7267.
    - Do not attempt to launch self-reachability tests when entering
      hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
    - Resolve several bugs related to descriptor fetching on bridge
      clients with bandwidth accounting enabled. (This combination is
      not recommended!) Fixes a case of bug 12062; bugfix
      on 0.2.0.3-alpha.
    - When hibernating, do not attempt to launch DNS checks. Fixes a
      case of bug 12062; bugfix on 0.1.2.2-alpha.
    - When hibernating, do not try to upload or download descriptors.
      Fixes a case of bug 12062; bugfix on 0.0.9pre5.

  o Minor bugfixes (IPv6, bridges):
    - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
      bugfix on 0.2.8.2-alpha.
    - Tor now sets IPv6 address in the routerstatus as well as in the
      router descriptors when updating addresses for a bridge. Closes
      ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".

  o Minor bugfixes (Linux seccomp2 sandbox):
    - When running with the sandbox enabled, reload configuration files
      correctly even when %include was used. Previously we would crash.
      Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.

  o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
    - Allow the nanosleep() system call, which glibc uses to implement
      sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.

  o Minor bugfixes (logging):
    - Fix a (mostly harmless) race condition when invoking
      LOG_PROTOCOL_WARN message from a subthread while the torrc options
      are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.

  o Minor bugfixes (man page, SocksPort):
    - Remove dead code from the old "SocksSocket" option, and rename
      SocksSocketsGroupWritable to UnixSocksGroupWritable. The old
      option still works, but is deprecated. Fixes bug 24343; bugfix
      on 0.2.6.3.

  o Minor bugfixes (memory leaks):
    - Avoid possible at-exit memory leaks related to use of Libevent's
      event_base_once() function. (This function tends to leak memory if
      the event_base is closed before the event fires.) Fixes bug 24584;
      bugfix on 0.2.8.1-alpha.
    - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
      on 0.2.1.1-alpha.

  o Minor bugfixes (network IPv6 test):
    - Tor's test scripts now check if "ping -6 ::1" works when the user
      runs "make test-network-all". Fixes bug 24677; bugfix on
      0.2.9.3-alpha. Patch by "ffmancera".

  o Minor bugfixes (networking):
    - string_is_valid_hostname() will not consider IP strings to be
      valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.

  o Minor bugfixes (onion service v3):
    - Avoid an assertion failure when the next onion service descriptor
      rotation type is out of sync with the consensus's valid-after
      time. Instead, log a warning message with extra information, so we
      can better hunt down the cause of this assertion. Fixes bug 25306;
      bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
    - Fix a memory leak when a v3 onion service is configured and gets a
      SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
    - When parsing the descriptor signature, look for the token plus an
      extra white-space at the end. This is more correct but also will
      allow us to support new fields that might start with "signature".
      Fixes bug 26069; bugfix on 0.3.0.1-alpha.

  o Minor bugfixes (onion services):
    - If we are configured to offer a single onion service, don't log
      long-term established one hop rendezvous points in the heartbeat.
      Fixes bug 25116; bugfix on 0.2.9.6-rc.

  o Minor bugfixes (performance):
    - Reduce the number of circuits that will be opened at once during
      the circuit build timeout phase. This is done by increasing the
      idle timeout to 3 minutes, and lowering the maximum number of
      concurrent learning circuits to 10. Fixes bug 24769; bugfix
      on 0.3.1.1-alpha.
    - Avoid calling protocol_list_supports_protocol() from inside tight
      loops when running with cached routerinfo_t objects. Instead,
      summarize the relevant protocols as flags in the routerinfo_t, as
      we do for routerstatus_t objects. This change simplifies our code
      a little, and saves a large amount of short-term memory allocation
      operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.

  o Minor bugfixes (performance, timeouts):
    - Consider circuits for timeout as soon as they complete a hop. This
      is more accurate than applying the timeout in
      circuit_expire_building() because that function is only called
      once per second, which is now too slow for typical timeouts on the
      current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
    - Use onion service circuits (and other circuits longer than 3 hops)
      to calculate a circuit build timeout. Previously, Tor only
      calculated its build timeout based on circuits that planned to be
      exactly 3 hops long. With this change, we include measurements
      from all circuits at the point where they complete their third
      hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.

  o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
    - Avoid a crash when running with DirPort set but ORPort tuned off.
      Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.

  o Minor bugfixes (Rust FFI):
    - Fix a minor memory leak which would happen whenever the C code
      would call the Rust implementation of
      protover_get_supported_protocols(). This was due to the C version
      returning a static string, whereas the Rust version newly allocated
      a CString to pass accross the FFI boundary. Consequently, the C
      code was not expecting to need to free() what it was given. Fixes
      bug 25127; bugfix on 0.3.2.1-alpha.

  o Minor bugfixes (spelling):
    - Use the "misspell" tool to detect and fix typos throughout the
      source code. Fixes bug 23650; bugfix on various versions of Tor.
      Patch from Deepesh Pathak.

  o Minor bugfixes (testing):
    - Avoid intermittent test failures due to a test that had relied on
      onion service introduction point creation finishing within 5
      seconds of real clock time. Fixes bug 25450; bugfix
      on 0.3.1.3-alpha.
    - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
      bugfix on 0.2.3.1-alpha.

  o Minor bugfixes (unit test, monotonic time):
    - Increase a constant (1msec to 10msec) in the monotonic time test
      that makes sure the nsec/usec/msec times read are synchronized.
      This change was needed to accommodate slow systems like armel or
      when the clock_gettime() is not a VDSO on the running kernel.
      Fixes bug 25113; bugfix on 0.2.9.1.

  o Code simplification and refactoring:
    - Move the list of default directory authorities to its own file.
      Closes ticket 24854. Patch by "beastr0".
    - Remove the old (deterministic) directory retry logic entirely:
      We've used exponential backoff exclusively for some time. Closes
      ticket 23814.
    - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
      ticket 25108.
    - Remove a series of counters used to track circuit extend attempts
      and connection status but that in reality we aren't using for
      anything other than stats logged by a SIGUSR1 signal. Closes
      ticket 25163.
    - Remove /usr/athena from search path in configure.ac. Closes
      ticket 24363.
    - Remove duplicate code in node_has_curve25519_onion_key() and
      node_get_curve25519_onion_key(), and add a check for a zero
      microdesc curve25519 onion key. Closes ticket 23966, patch by
      "aruna1234" and teor.
    - Rewrite channel_rsa_id_group_set_badness to reduce temporary
      memory allocations with large numbers of OR connections (e.g.
      relays). Closes ticket 24119.
    - Separate the function that deletes ephemeral files when Tor
      stops gracefully.
    - Small changes to Tor's buf_t API to make it suitable for use as a
      general-purpose safe string constructor. Closes ticket 22342.
    - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
      avoid source code identifier confusion. Closes ticket 24467.
    - The tor_git_revision[] constant no longer needs to be redeclared
      by everything that links against the rest of Tor. Done as part of
      ticket 23845, to simplify our external API.
    - We make extend_info_from_node() use node_get_curve25519_onion_key()
      introduced in ticket 23577 to access the curve25519 public keys
      rather than accessing it directly. Closes ticket 23760. Patch by
      Neel Chauhan.
    - Add a function to log channels' scheduler state changes to aid
      debugging efforts. Closes ticket 24531.

  o Documentation:
    - Improved the documentation of AccountingStart parameter. Closes
      ticket 23635.
    - Update the documentation for "Log" to include the current list of
      logging domains. Closes ticket 25378.
    - Add documentation on how to build tor with Rust dependencies
      without having to be online. Closes ticket 22907; bugfix
      on 0.3.0.3-alpha.
    - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
      traffic. Closes ticket 24318.
    - Document that OutboundBindAddress doesn't apply to DNS requests.
      Closes ticket 22145. Patch from Aruna Maurya.

  o Code simplification and refactoring (channels):
    - Remove the incoming and outgoing channel queues. These were never
      used, but still took up a step in our fast path.
    - The majority of the channel unit tests have been rewritten and the
      code coverage has now been raised to 83.6% for channel.c. Closes
      ticket 23709.
    - Remove other dead code from the channel subsystem: All together,
      this cleanup has removed more than 1500 lines of code overall and
      adding very little except for unit test.

  o Code simplification and refactoring (circuit rendezvous):
    - Split the client-side rendezvous circuit lookup into two
      functions: one that returns only established circuits and another
      that returns all kinds of circuits. Closes ticket 23459.

  o Code simplification and refactoring (controller):
    - Make most of the variables in networkstatus_getinfo_by_purpose()
      const. Implements ticket 24489.

  o Documentation (backport from 0.3.4.1-alpha):
    - Correct an IPv6 error in the documentation for ExitPolicy. Closes
      ticket 25857. Patch from "CTassisF".

  o Documentation (man page):
    - The HiddenServiceVersion torrc option accepts only one number:
      either version 2 or 3. Closes ticket 25026; bugfix
      on 0.3.2.2-alpha.

  o Documentation (manpage, denial of service):
    - Provide more detail about the denial-of-service options, by
      listing each mitigation and explaining how they relate. Closes
      ticket 25248.

Revision 1.89: download - view: text, markup, annotated - select for diffs
Sun Mar 4 07:46:06 2018 UTC (6 years, 9 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2018Q1-base, pkgsrc-2018Q1
Diff to: previous 1.88: preferred, colored
Changes since revision 1.88: +5 -5 lines
tor: update to 0.3.2.10.

Changes in version 0.3.2.10 - 2018-03-03
  Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
  backports a number of bugfixes, including important fixes for security
  issues.

  It includes an important security fix for a remote crash attack
  against directory authorities, tracked as TROVE-2018-001.

  Additionally, it backports a fix for a bug whose severity we have
  upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
  triggered in order to crash relays with a use-after-free pattern. As
  such, we are now tracking that bug as TROVE-2018-002 and
  CVE-2018-0491, and backporting it to earlier releases.  This bug
  affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
  0.3.3.1-alpha.

  This release also backports our new system for improved resistance to
  denial-of-service attacks against relays.

  This release also fixes several minor bugs and annoyances from
  earlier releases.

  Relays running 0.3.2.x SHOULD upgrade to one of the versions released
  today, for the fix to TROVE-2018-002.  Directory authorities should
  also upgrade. (Relays on earlier versions might want to update too for
  the DoS mitigations.)

Revision 1.88: download - view: text, markup, annotated - select for diffs
Tue Jan 9 15:13:25 2018 UTC (6 years, 10 months ago) by wiz
Branches: MAIN
Diff to: previous 1.87: preferred, colored
Changes since revision 1.87: +5 -5 lines
tor: update to 0.3.2.9.

  Tor 0.3.2.9 is the first stable release in the 0.3.2 series.

  The 0.3.2 series includes our long-anticipated new onion service
  design, with numerous security features. (For more information, see
  our blog post at https://blog.torproject.org/fall-harvest.) We also
  have a new circuit scheduler algorithm for improved performance on
  relays everywhere (see https://blog.torproject.org/kist-and-tell),
  along with many smaller features and bugfixes.

Revision 1.87: download - view: text, markup, annotated - select for diffs
Sat Dec 2 12:22:14 2017 UTC (7 years ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2017Q4-base, pkgsrc-2017Q4
Diff to: previous 1.86: preferred, colored
Changes since revision 1.86: +5 -5 lines
tor: update to 0.3.1.9.

Changes in version 0.3.1.9 - 2017-12-01:
  Tor 0.3.1.9 backports important security and stability fixes from the
  0.3.2 development series. All Tor users should upgrade to this
  release, or to another of the releases coming out today.

  o Major bugfixes (security, backport from 0.3.2.6-alpha):
    - Fix a denial of service bug where an attacker could use a
      malformed directory object to cause a Tor instance to pause while
      OpenSSL would try to read a passphrase from the terminal. (Tor
      instances run without a terminal, which is the case for most Tor
      packages, are not impacted.) Fixes bug 24246; bugfix on every
      version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
      Found by OSS-Fuzz as testcase 6360145429790720.
    - Fix a denial of service issue where an attacker could crash a
      directory authority using a malformed router descriptor. Fixes bug
      24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
      and CVE-2017-8820.
    - When checking for replays in the INTRODUCE1 cell data for a
      (legacy) onion service, correctly detect replays in the RSA-
      encrypted part of the cell. We were previously checking for
      replays on the entire cell, but those can be circumvented due to
      the malleability of Tor's legacy hybrid encryption. This fix helps
      prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
      0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
      and CVE-2017-8819.

  o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
    - Fix a use-after-free error that could crash v2 Tor onion services
      when they failed to open circuits while expiring introduction
      points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
      also tracked as TROVE-2017-013 and CVE-2017-8823.

  o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
    - When running as a relay, make sure that we never build a path
      through ourselves, even in the case where we have somehow lost the
      version of our descriptor appearing in the consensus. Fixes part
      of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
      as TROVE-2017-012 and CVE-2017-8822.
    - When running as a relay, make sure that we never choose ourselves
      as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
      issue is also tracked as TROVE-2017-012 and CVE-2017-8822.

  o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
    - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
      making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
      0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
      identifying and finding a workaround to this bug and to Moritz,
      Arthur Edelstein, and Roger for helping to track it down and
      analyze it.

  o Minor features (bridge):
    - Bridges now include notice in their descriptors that they are
      bridges, and notice of their distribution status, based on their
      publication settings. Implements ticket 18329. For more fine-
      grained control of how a bridge is distributed, upgrade to 0.3.2.x
      or later.

  o Minor features (directory authority, backport from 0.3.2.6-alpha):
    - Add an IPv6 address for the "bastet" directory authority. Closes
      ticket 24394.

  o Minor features (geoip):
    - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
      Country database.

  o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
    - Avoid unnecessary calls to directory_fetches_from_authorities() on
      relays, to prevent spurious address resolutions and descriptor
      rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
      bugfix on in 0.2.8.1-alpha.

  o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
    - Fix unused variable warnings in donna's Curve25519 SSE2 code.
      Fixes bug 22895; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
    - When a circuit is marked for close, do not attempt to package any
      cells for channels on that circuit. Previously, we would detect
      this condition lower in the call stack, when we noticed that the
      circuit had no attached channel, and log an annoying message.
      Fixes bug 8185; bugfix on 0.2.5.4-alpha.

  o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
    - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
      so it matches dir-spec.txt. Fixes bug 24262; bugfix
      on 0.3.1.1-alpha.

  o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
    - Avoid a crash when transitioning from client mode to bridge mode.
      Previously, we would launch the worker threads whenever our
      "public server" mode changed, but not when our "server" mode
      changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.

Revision 1.86: download - view: text, markup, annotated - select for diffs
Fri Oct 27 12:56:59 2017 UTC (7 years, 1 month ago) by adam
Branches: MAIN
Diff to: previous 1.85: preferred, colored
Changes since revision 1.85: +5 -5 lines
tor: updated to 0.3.1.8

Changes in version 0.3.1.8:
  Tor 0.3.1.7 is the second stable release in the 0.3.1 series.
  It includes several bugfixes, including a bugfix for a crash issue
  that had affected relays under memory pressure. It also adds
  a new directory authority, Bastet.

  o Directory authority changes:
    - Add "Bastet" as a ninth directory authority to the default list.
    - The directory authority "Longclaw" has changed its IP address.

  o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
    - Fix a timing-based assertion failure that could occur when the
      circuit out-of-memory handler freed a connection's output buffer.

  o Minor features (directory authorities, backport from 0.3.2.2-alpha):
    - Remove longclaw's IPv6 address, as it will soon change. Authority
      IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
      3/8 directory authorities with IPv6 addresses, but there are also
      52 fallback directory mirrors with IPv6 addresses.

  o Minor features (geoip):
    - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
    - Fix a compilation warning when building with zstd support on
      32-bit platforms.

  o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
    - Handle a pathological case when decompressing Zstandard data when
      the output buffer size is zero.

  o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
    - Remove the length limit on HTTP status lines that authorities can
      send in their replies.

  o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
    - Avoid a possible double close of a circuit by the intro point on
      error of sending the INTRO_ESTABLISHED cell.

  o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
    - Clear the address when node_get_prim_orport() returns early.

  o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
    - Fix additional channelpadding unit test failures by using mocked
      time instead of actual time for all tests.

Revision 1.85: download - view: text, markup, annotated - select for diffs
Tue Sep 19 14:13:22 2017 UTC (7 years, 2 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2017Q3-base, pkgsrc-2017Q3
Diff to: previous 1.84: preferred, colored
Changes since revision 1.84: +5 -5 lines
tor: update to 0.3.0.11.

Changes in version 0.3.0.11 - 2017-09-18
  Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
  series.

  Most significantly, it includes a fix for TROVE-2017-008, a
  security bug that affects hidden services running with the
  SafeLogging option disabled. For more information, see
  https://trac.torproject.org/projects/tor/ticket/23490

  o Minor features (code style, backport from 0.3.1.7):
    - Add "Falls through" comments to our codebase, in order to silence
      GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
      Stieger. Closes ticket 22446.

  o Minor features:
    - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (compilation, backport from 0.3.1.7):
    - Avoid compiler warnings in the unit tests for calling tor_sscanf()
      with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.

  o Minor bugfixes (controller, backport from 0.3.1.7):
    - Do not crash when receiving a HSPOST command with an empty body.
      Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
    - Do not crash when receiving a POSTDESCRIPTOR command with an empty
      body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.

  o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
    - When setting the maximum number of connections allowed by the OS,
      always allow some extra file descriptors for other files. Fixes
      bug 22797; bugfix on 0.2.0.10-alpha.

  o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
    - Remove a forgotten debugging message when an introduction point
      successfully establishes a hidden service prop224 circuit with
      a client.
    - Change three other log_warn() for an introduction point to
      protocol warnings, because they can be failure from the network
      and are not relevant to the operator. Fixes bug 23078; bugfix on
      0.3.0.1-alpha and 0.3.0.2-alpha.

Revision 1.84: download - view: text, markup, annotated - select for diffs
Tue Aug 15 19:22:44 2017 UTC (7 years, 3 months ago) by wiz
Branches: MAIN
Diff to: previous 1.83: preferred, colored
Changes since revision 1.83: +5 -5 lines
Updated tor to 0.3.0.10.

Changes in version 0.3.0.10 - 2017-08-02
   Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
   from the current Tor alpha series. OpenBSD users and TPROXY users
   should upgrade; others are probably okay sticking with 0.3.0.9.

  o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
    - Tor's repository now includes a Travis Continuous Integration (CI)
      configuration file (.travis.yml). This is meant to help new
      developers and contributors who fork Tor to a Github repository be
      better able to test their changes, and understand what we expect
      to pass. To use this new build feature, you must fork Tor to your
      Github account, then go into the "Integrations" menu in the
      repository settings for your fork and enable Travis, then push
      your changes. Closes ticket 22636.

  o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
    - Fix a typo that had prevented TPROXY-based transparent proxying
      from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
      Patch from "d4fq0fQAgoJ".

  o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
    - Avoid an assertion failure bug affecting our implementation of
      inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
      handling of "0xfoo" differs from what we had expected. Fixes bug
      22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.

  o Minor features (backport from 0.3.1.5-alpha):
    - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
    - Roll over monthly accounting at the configured hour and minute,
      rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
      Found by Andrey Karpov with PVS-Studio.

  o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
    - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
      bugfix on 0.2.8.1-alpha.
    - Fix warnings when building with libscrypt and openssl scrypt
      support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
    - When building with certain versions of the mingw C header files,
      avoid float-conversion warnings when calling the C functions
      isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
    - Backport a fix for an "unused variable" warning that appeared
      in some versions of mingw. Fixes bug 22838; bugfix on
      0.2.8.1-alpha.

  o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
    - Avoid Coverity build warnings related to our BUG() macro. By
      default, Coverity treats BUG() as the Linux kernel does: an
      instant abort(). We need to override that so our BUG() macro
      doesn't prevent Coverity from analyzing functions that use it.
      Fixes bug 23030; bugfix on 0.2.9.1-alpha.

  o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
    - When rejecting a router descriptor for running an obsolete version
      of Tor without ntor support, warn about the obsolete tor version,
      not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.

  o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
    - Avoid a sandbox failure when trying to re-bind to a socket and
      mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.

  o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
    - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
      Fixes bug 22803; bugfix on 0.3.0.1-alpha.

Revision 1.83: download - view: text, markup, annotated - select for diffs
Mon Jul 3 22:20:37 2017 UTC (7 years, 5 months ago) by wiz
Branches: MAIN
Diff to: previous 1.82: preferred, colored
Changes since revision 1.82: +5 -5 lines
Updated tor to 0.3.0.9.

Changes in version 0.3.0.9 - 2017-06-29
  Tor 0.3.0.9 fixes a path selection bug that would allow a client
  to use a guard that was in the same network family as a chosen exit
  relay. This is a security regression; all clients running earlier
  versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
  0.3.1.4-alpha.

  This release also backports several other bugfixes from the 0.3.1.x
  series.

  o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
    - When choosing which guard to use for a circuit, avoid the exit's
      family along with the exit itself. Previously, the new guard
      selection logic avoided the exit, but did not consider its family.
      Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2016-
      006 and CVE-2017-0377.

  o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
    - Don't block bootstrapping when a primary bridge is offline and we
      can't get its descriptor. Fixes bug 22325; fixes one case of bug
      21969; bugfix on 0.3.0.3-alpha.

  o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
    - When starting with an old consensus, do not add new entry guards
      unless the consensus is "reasonably live" (under 1 day old). Fixes
      one root cause of bug 22400; bugfix on 0.3.0.1-alpha.

  o Minor features (geoip):
    - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
    - Reject version numbers with non-numeric prefixes (such as +, -, or
      whitespace). Disallowing whitespace prevents differential version
      parsing between POSIX-based and Windows platforms. Fixes bug 21507
      and part of 21508; bugfix on 0.0.8pre1.

  o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
    - Permit the fchmod system call, to avoid crashing on startup when
      starting with the seccomp2 sandbox and an unexpected set of
      permissions on the data directory or its contents. Fixes bug
      22516; bugfix on 0.2.5.4-alpha.

  o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
    - Fix a memset() off the end of an array when packing cells. This
      bug should be harmless in practice, since the corrupted bytes are
      still in the same structure, and are always padding bytes,
      ignored, or immediately overwritten, depending on compiler
      behavior. Nevertheless, because the memset()'s purpose is to make
      sure that any other cell-handling bugs can't expose bytes to the
      network, we need to fix it. Fixes bug 22737; bugfix on
      0.2.4.11-alpha. Fixes CID 1401591.

Revision 1.79.2.3: download - view: text, markup, annotated - select for diffs
Wed Jun 21 18:24:51 2017 UTC (7 years, 5 months ago) by bsiegert
Branches: pkgsrc-2017Q1
Diff to: previous 1.79.2.2: preferred, colored; branchpoint 1.79: preferred, colored; next MAIN 1.80: preferred, colored
Changes since revision 1.79.2.2: +5 -5 lines
Pullup ticket #5481 - requested by sevan
net/tor: security fix

Revisions pulled up:
- net/tor/Makefile                                              1.122
- net/tor/distinfo                                              1.82

---
   Module Name:    pkgsrc
   Committed By:   wiz
   Date:           Wed Jun 14 16:16:04 UTC 2017

   Modified Files:
           pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Updated tor to 0.3.0.8.

   Changes in version 0.3.0.8 - 2017-06-08
     Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
     remotely crash a hidden service with an assertion failure. Anyone
     running a hidden service should upgrade to this version, or to some
     other version with fixes for TROVE-2017-004 and TROVE-2017-005.

     Tor 0.3.0.8 also includes fixes for several key management bugs
     that sometimes made relays unreliable, as well as several other
     bugfixes described below.

     o Major bugfixes (hidden service, relay, security, backport
       from 0.3.1.3-alpha):
       - Fix a remotely triggerable assertion failure when a hidden service
         handles a malformed BEGIN cell. Fixes bug 22493, tracked as
         TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
       - Fix a remotely triggerable assertion failure caused by receiving a
         BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
         22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
         on 0.2.2.1-alpha.

     o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
       - When performing the v3 link handshake on a TLS connection, report
         that we have the x509 certificate that we actually used on that
         connection, even if we have changed certificates since that
         connection was first opened. Previously, we would claim to have
         used our most recent x509 link certificate, which would sometimes
         make the link handshake fail. Fixes one case of bug 22460; bugfix
         on 0.2.3.6-alpha.

     o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
       - Regenerate link and authentication certificates whenever the key
         that signs them changes; also, regenerate link certificates
         whenever the signed key changes. Previously, these processes were
         only weakly coupled, and we relays could (for minutes to hours)
         wind up with an inconsistent set of keys and certificates, which
         other relays would not accept. Fixes two cases of bug 22460;
         bugfix on 0.3.0.1-alpha.
       - When sending an Ed25519 signing->link certificate in a CERTS cell,
         send the certificate that matches the x509 certificate that we
         used on the TLS connection. Previously, there was a race condition
         if the TLS context rotated after we began the TLS handshake but
         before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
         on 0.3.0.1-alpha.

     o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
       - Stop rejecting v3 hidden service descriptors because their size
         did not match an old padding rule. Fixes bug 22447; bugfix on
         tor-0.3.0.1-alpha.

     o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
       - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
         December 2016 (of which ~126 were still functional) with a list of
         151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
         2017. Resolves ticket 21564.

     o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
       - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
         bug 22252; bugfix on 0.2.9.3-alpha.

     o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
       - Avoid undefined behavior when parsing IPv6 entries from the geoip6
         file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.

     o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
       - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
         months, and regenerate it when it is within one month of expiring.
         Previously, we had generated this certificate at startup with a
         ten-year lifetime, but that could lead to weird behavior when Tor
         was started with a grossly inaccurate clock. Mitigates bug 22466;
         mitigation on 0.3.0.1-alpha.

     o Minor bugfixes (memory leak, directory authority, backport from
       0.3.1.2-alpha):
       - When directory authorities reject a router descriptor due to
         keypinning, free the router descriptor rather than leaking the
         memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.

Revision 1.82: download - view: text, markup, annotated - select for diffs
Wed Jun 14 16:16:04 2017 UTC (7 years, 5 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2017Q2-base, pkgsrc-2017Q2
Diff to: previous 1.81: preferred, colored
Changes since revision 1.81: +5 -5 lines
Updated tor to 0.3.0.8.

Changes in version 0.3.0.8 - 2017-06-08
  Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
  remotely crash a hidden service with an assertion failure. Anyone
  running a hidden service should upgrade to this version, or to some
  other version with fixes for TROVE-2017-004 and TROVE-2017-005.

  Tor 0.3.0.8 also includes fixes for several key management bugs
  that sometimes made relays unreliable, as well as several other
  bugfixes described below.

  o Major bugfixes (hidden service, relay, security, backport
    from 0.3.1.3-alpha):
    - Fix a remotely triggerable assertion failure when a hidden service
      handles a malformed BEGIN cell. Fixes bug 22493, tracked as
      TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
    - Fix a remotely triggerable assertion failure caused by receiving a
      BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
      22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
      on 0.2.2.1-alpha.

  o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
    - When performing the v3 link handshake on a TLS connection, report
      that we have the x509 certificate that we actually used on that
      connection, even if we have changed certificates since that
      connection was first opened. Previously, we would claim to have
      used our most recent x509 link certificate, which would sometimes
      make the link handshake fail. Fixes one case of bug 22460; bugfix
      on 0.2.3.6-alpha.

  o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
    - Regenerate link and authentication certificates whenever the key
      that signs them changes; also, regenerate link certificates
      whenever the signed key changes. Previously, these processes were
      only weakly coupled, and we relays could (for minutes to hours)
      wind up with an inconsistent set of keys and certificates, which
      other relays would not accept. Fixes two cases of bug 22460;
      bugfix on 0.3.0.1-alpha.
    - When sending an Ed25519 signing->link certificate in a CERTS cell,
      send the certificate that matches the x509 certificate that we
      used on the TLS connection. Previously, there was a race condition
      if the TLS context rotated after we began the TLS handshake but
      before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
      on 0.3.0.1-alpha.

  o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
    - Stop rejecting v3 hidden service descriptors because their size
      did not match an old padding rule. Fixes bug 22447; bugfix on
      tor-0.3.0.1-alpha.

  o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
    - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
      December 2016 (of which ~126 were still functional) with a list of
      151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
      2017. Resolves ticket 21564.

  o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
    - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
      bug 22252; bugfix on 0.2.9.3-alpha.

  o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
    - Avoid undefined behavior when parsing IPv6 entries from the geoip6
      file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.

  o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
    - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
      months, and regenerate it when it is within one month of expiring.
      Previously, we had generated this certificate at startup with a
      ten-year lifetime, but that could lead to weird behavior when Tor
      was started with a grossly inaccurate clock. Mitigates bug 22466;
      mitigation on 0.3.0.1-alpha.

  o Minor bugfixes (memory leak, directory authority, backport from
    0.3.1.2-alpha):
    - When directory authorities reject a router descriptor due to
      keypinning, free the router descriptor rather than leaking the
      memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.

Revision 1.79.2.2: download - view: text, markup, annotated - select for diffs
Mon May 29 18:42:04 2017 UTC (7 years, 6 months ago) by bsiegert
Branches: pkgsrc-2017Q1
Diff to: previous 1.79.2.1: preferred, colored; branchpoint 1.79: preferred, colored
Changes since revision 1.79.2.1: +5 -5 lines
Pullup ticket #5452 - requested by sevan
net/tor: security fix

Revisions pulled up:
- net/tor/Makefile                                              1.121
- net/tor/distinfo                                              1.81

---
   Module Name:    pkgsrc
   Committed By:   adam
   Date:           Wed May 17 07:13:37 UTC 2017

   Modified Files:
           pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Changes in version 0.3.0.7 - 2017-05-15
     Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
     of Tor 0.3.0.x, where an attacker could cause a Tor relay process to
     exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
     clients are not affected.

     o Major bugfixes (hidden service directory, security):
       - Fix an assertion failure in the hidden service directory code,
         which could be used by an attacker to remotely cause a Tor relay
         process to exit. Relays running earlier versions of Tor 0.3.0.x
         should upgrade. This security issue is tracked as TROVE-2017-002.
         Fixes bug 22246; bugfix on 0.3.0.1-alpha.

     o Minor features:
       - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
         Country database.

     o Minor features (future-proofing):
       - Tor no longer refuses to download microdescriptors or descriptors
         if they are listed as "published in the future". This change will
         eventually allow us to stop listing meaningful "published" dates
         in microdescriptor consensuses, and thereby allow us to reduce the
         resources required to download consensus diffs by over 50%.
         Implements part of ticket 21642; implements part of proposal 275.

     o Minor bugfixes (Linux seccomp2 sandbox):
       - The getpid() system call is now permitted under the Linux seccomp2
         sandbox, to avoid crashing with versions of OpenSSL (and other
         libraries) that attempt to learn the process's PID by using the
         syscall rather than the VDSO code. Fixes bug 21943; bugfix
         on 0.2.5.1-alpha.

Revision 1.81: download - view: text, markup, annotated - select for diffs
Wed May 17 07:13:37 2017 UTC (7 years, 6 months ago) by adam
Branches: MAIN
Diff to: previous 1.80: preferred, colored
Changes since revision 1.80: +5 -5 lines
Changes in version 0.3.0.7 - 2017-05-15
  Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
  of Tor 0.3.0.x, where an attacker could cause a Tor relay process to
  exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
  clients are not affected.

  o Major bugfixes (hidden service directory, security):
    - Fix an assertion failure in the hidden service directory code,
      which could be used by an attacker to remotely cause a Tor relay
      process to exit. Relays running earlier versions of Tor 0.3.0.x
      should upgrade. This security issue is tracked as TROVE-2017-002.
      Fixes bug 22246; bugfix on 0.3.0.1-alpha.

  o Minor features:
    - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
      Country database.

  o Minor features (future-proofing):
    - Tor no longer refuses to download microdescriptors or descriptors
      if they are listed as "published in the future". This change will
      eventually allow us to stop listing meaningful "published" dates
      in microdescriptor consensuses, and thereby allow us to reduce the
      resources required to download consensus diffs by over 50%.
      Implements part of ticket 21642; implements part of proposal 275.

  o Minor bugfixes (Linux seccomp2 sandbox):
    - The getpid() system call is now permitted under the Linux seccomp2
      sandbox, to avoid crashing with versions of OpenSSL (and other
      libraries) that attempt to learn the process's PID by using the
      syscall rather than the VDSO code. Fixes bug 21943; bugfix
      on 0.2.5.1-alpha.

Revision 1.79.2.1: download - view: text, markup, annotated - select for diffs
Sat May 6 15:11:39 2017 UTC (7 years, 7 months ago) by bsiegert
Branches: pkgsrc-2017Q1
Diff to: previous 1.79: preferred, colored
Changes since revision 1.79: +5 -5 lines
Pullup ticket #5393 - requested by sevan
net/tor: point update (ensure package remains functional)

Revisions pulled up:
- net/tor/Makefile                                              1.119
- net/tor/distinfo                                              1.80

---
   Module Name:    pkgsrc
   Committed By:   wiz
   Date:           Tue May  2 11:16:02 UTC 2017

   Modified Files:
           pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Updated tor to 0.3.0.6.

   Changes in version 0.3.0.6 - 2017-04-26
     Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.

     With the 0.3.0 series, clients and relays now use Ed25519 keys to
     authenticate their link connections to relays, rather than the old
     RSA1024 keys that they used before. (Circuit crypto has been
     Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
     the guard selection and replacement algorithm to behave more robustly
     in the presence of unreliable networks, and to resist guard-
     capture attacks.

     This series also includes numerous other small features and bugfixes,
     along with more groundwork for the upcoming hidden-services revamp.

     Per our stable release policy, we plan to support the Tor 0.3.0
     release series for at least the next nine months, or for three months
     after the first stable release of the 0.3.1 series: whichever is
     longer. If you need a release with long-term support, we recommend
     that you stay with the 0.2.9 series.

     Below are the changes since 0.2.9.10. For a list of only the changes
     since 0.3.0.5-rc, see the ChangeLog file.

     o Major features (directory authority, security):
       - The default for AuthDirPinKeys is now 1: directory authorities
         will reject relays where the RSA identity key matches a previously
         seen value, but the Ed25519 key has changed. Closes ticket 18319.

     o Major features (guard selection algorithm):
       - Tor's guard selection algorithm has been redesigned from the
         ground up, to better support unreliable networks and restrictive
         sets of entry nodes, and to better resist guard-capture attacks by
         hostile local networks. Implements proposal 271; closes
         ticket 19877.

     o Major features (next-generation hidden services):
       - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
         prop224 aka "Next Generation Hidden Services". Service and clients
         don't use this functionality yet. Closes ticket 19043. Based on
         initial code by Alec Heifetz.
       - Relays now support the HSDir version 3 protocol, so that they can
         can store and serve v3 descriptors. This is part of the next-
         generation onion service work detailled in proposal 224. Closes
         ticket 17238.

     o Major features (protocol, ed25519 identity keys):
       - Clients now support including Ed25519 identity keys in the EXTEND2
         cells they generate. By default, this is controlled by a consensus
         parameter, currently disabled. You can turn this feature on for
         testing by setting ExtendByEd25519ID in your configuration. This
         might make your traffic appear different than the traffic
         generated by other users, however. Implements part of ticket
         15056; part of proposal 220.
       - Relays now understand requests to extend to other relays by their
         Ed25519 identity keys. When an Ed25519 identity key is included in
         an EXTEND2 cell, the relay will only extend the circuit if the
         other relay can prove ownership of that identity. Implements part
         of ticket 15056; part of proposal 220.
       - Relays now use Ed25519 to prove their Ed25519 identities and to
         one another, and to clients. This algorithm is faster and more
         secure than the RSA-based handshake we've been doing until now.
         Implements the second big part of proposal 220; Closes
         ticket 15055.

     o Major features (security):
       - Change the algorithm used to decide DNS TTLs on client and server
         side, to better resist DNS-based correlation attacks like the
         DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
         Feamster. Now relays only return one of two possible DNS TTL
         values, and clients are willing to believe DNS TTL values up to 3
         hours long. Closes ticket 19769.

     o Major bugfixes (client, onion service, also in 0.2.9.9):
       - Fix a client-side onion service reachability bug, where multiple
         socks requests to an onion service (or a single slow request)
         could cause us to mistakenly mark some of the service's
         introduction points as failed, and we cache that failure so
         eventually we run out and can't reach the service. Also resolves a
         mysterious "Remote server sent bogus reason code 65021" log
         warning. The bug was introduced in ticket 17218, where we tried to
         remember the circuit end reason as a uint16_t, which mangled
         negative values. Partially fixes bug 21056 and fixes bug 20307;
         bugfix on 0.2.8.1-alpha.

     o Major bugfixes (crash, directory connections):
       - Fix a rare crash when sending a begin cell on a circuit whose
         linked directory connection had already been closed. Fixes bug
         21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.

     o Major bugfixes (directory authority):
       - During voting, when marking a relay as a probable sybil, do not
         clear its BadExit flag: sybils can still be bad in other ways
         too. (We still clear the other flags.) Fixes bug 21108; bugfix
         on 0.2.0.13-alpha.

     o Major bugfixes (DNS):
       - Fix a bug that prevented exit nodes from caching DNS records for
         more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.

     o Major bugfixes (IPv6 Exits):
       - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
         any IPv6 addresses. Instead, only reject a port over IPv6 if the
         exit policy rejects that port on more than an IPv6 /16 of
         addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
         which rejected a relay's own IPv6 address by default. Fixes bug
         21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.

     o Major bugfixes (parsing):
       - Fix an integer underflow bug when comparing malformed Tor
         versions. This bug could crash Tor when built with
         --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
         0.2.9.8, which were built with -ftrapv by default. In other cases
         it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
         on 0.0.8pre1. Found by OSS-Fuzz.
       - When parsing a malformed content-length field from an HTTP
         message, do not read off the end of the buffer. This bug was a
         potential remote denial-of-service attack against Tor clients and
         relays. A workaround was released in October 2016, to prevent this
         bug from crashing Tor. This is a fix for the underlying issue,
         which should no longer matter (if you applied the earlier patch).
         Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
         using AFL (http://lcamtuf.coredump.cx/afl/).

     o Major bugfixes (scheduler):
       - Actually compare circuit policies in ewma_cmp_cmux(). This bug
         caused the channel scheduler to behave more or less randomly,
         rather than preferring channels with higher-priority circuits.
         Fixes bug 20459; bugfix on 0.2.6.2-alpha.

     o Major bugfixes (security, also in 0.2.9.9):
       - Downgrade the "-ftrapv" option from "always on" to "only on when
         --enable-expensive-hardening is provided." This hardening option,
         like others, can turn survivable bugs into crashes--and having it
         on by default made a (relatively harmless) integer overflow bug
         into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
         bugfix on 0.2.9.1-alpha.

     o Minor feature (client):
       - Enable IPv6 traffic on the SocksPort by default. To disable this,
         a user will have to specify "NoIPv6Traffic". Closes ticket 21269.

     o Minor feature (fallback scripts):
       - Add a check_existing mode to updateFallbackDirs.py, which checks
         if fallbacks in the hard-coded list are working. Closes ticket
         20174. Patch by haxxpop.

     o Minor feature (protocol versioning):
       - Add new protocol version for proposal 224. HSIntro now advertises
         version "3-4" and HSDir version "1-2". Fixes ticket 20656.

     o Minor features (ciphersuite selection):
       - Allow relays to accept a wider range of ciphersuites, including
         chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
       - Clients now advertise a list of ciphersuites closer to the ones
         preferred by Firefox. Closes part of ticket 15426.

     o Minor features (controller):
       - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
         shared-random values to the controller. Closes ticket 19925.
       - When HSFETCH arguments cannot be parsed, say "Invalid argument"
         rather than "unrecognized." Closes ticket 20389; patch from
         Ivan Markin.

     o Minor features (controller, configuration):
       - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
         and so on, now comes with a __*Port variant that will not be saved
         to the torrc file by the controller's SAVECONF command. This
         change allows TorBrowser to set up a single-use domain socket for
         each time it launches Tor. Closes ticket 20956.
       - The GETCONF command can now query options that may only be
         meaningful in context-sensitive lists. This allows the controller
         to query the mixed SocksPort/__SocksPort style options introduced
         in feature 20956. Implements ticket 21300.

     o Minor features (diagnostic, directory client):
       - Warn when we find an unexpected inconsistency in directory
         download status objects. Prevents some negative consequences of
         bug 20593.

     o Minor features (directory authorities):
       - Directory authorities now reject descriptors that claim to be
         malformed versions of Tor. Helps prevent exploitation of
         bug 21278.
       - Reject version numbers with components that exceed INT32_MAX.
         Otherwise 32-bit and 64-bit platforms would behave inconsistently.
         Fixes bug 21450; bugfix on 0.0.8pre1.

     o Minor features (directory authority):
       - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
         default) to control whether authorities should try to probe relays
         by their Ed25519 link keys. This option will go away in a few
         releases--unless we encounter major trouble in our ed25519 link
         protocol rollout, in which case it will serve as a safety option.

     o Minor features (directory cache):
       - Relays and bridges will now refuse to serve the consensus they
         have if they know it is too old for a client to use. Closes
         ticket 20511.

     o Minor features (ed25519 link handshake):
       - Advertise support for the ed25519 link handshake using the
         subprotocol-versions mechanism, so that clients can tell which
         relays can identity themselves by Ed25519 ID. Closes ticket 20552.

     o Minor features (entry guards):
       - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
         break regression tests.
       - Require UseEntryGuards when UseBridges is set, in order to make
         sure bridges aren't bypassed. Resolves ticket 20502.

     o Minor features (fallback directories):
       - Allow 3 fallback relays per operator, which is safe now that we
         are choosing 200 fallback relays. Closes ticket 20912.
       - Annotate updateFallbackDirs.py with the bandwidth and consensus
         weight for each candidate fallback. Closes ticket 20878.
       - Display the relay fingerprint when downloading consensuses from
         fallbacks. Closes ticket 20908.
       - Exclude relays affected by bug 20499 from the fallback list.
         Exclude relays from the fallback list if they are running versions
         known to be affected by bug 20499, or if in our tests they deliver
         a stale consensus (i.e. one that expired more than 24 hours ago).
         Closes ticket 20539.
       - Make it easier to change the output sort order of fallbacks.
         Closes ticket 20822.
       - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
         ticket 18828.
       - Require fallback directories to have the same address and port for
         7 days (now that we have enough relays with this stability).
         Relays whose OnionOO stability timer is reset on restart by bug
         18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
         this issue. Closes ticket 20880; maintains short-term fix
         in 0.2.8.2-alpha.
       - Require fallbacks to have flags for 90% of the time (weighted
         decaying average), rather than 95%. This allows at least 73% of
         clients to bootstrap in the first 5 seconds without contacting an
         authority. Part of ticket 18828.
       - Select 200 fallback directories for each release. Closes
         ticket 20881.

     o Minor features (fingerprinting resistence, authentication):
       - Extend the length of RSA keys used for TLS link authentication to
         2048 bits. (These weren't used for forward secrecy; for forward
         secrecy, we used P256.) Closes ticket 13752.

     o Minor features (geoip):
       - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
         Country database.

     o Minor features (geoip, also in 0.2.9.9):
       - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
         Country database.

     o Minor features (infrastructure):
       - Implement smartlist_add_strdup() function. Replaces the use of
         smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.

     o Minor features (linting):
       - Enhance the changes file linter to warn on Tor versions that are
         prefixed with "tor-". Closes ticket 21096.

     o Minor features (logging):
       - In several places, describe unset ed25519 keys as "<unset>",
         rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.

     o Minor features (portability, compilation):
       - Autoconf now checks to determine if OpenSSL structures are opaque,
         instead of explicitly checking for OpenSSL version numbers. Part
         of ticket 21359.
       - Support building with recent LibreSSL code that uses opaque
         structures. Closes ticket 21359.

     o Minor features (relay):
       - We now allow separation of exit and relay traffic to different
         source IP addresses, using the OutboundBindAddressExit and
         OutboundBindAddressOR options respectively. Closes ticket 17975.
         Written by Michael Sonntag.

     o Minor features (reliability, crash):
       - Try better to detect problems in buffers where they might grow (or
         think they have grown) over 2 GB in size. Diagnostic for
         bug 21369.

     o Minor features (testing):
       - During 'make test-network-all', if tor logs any warnings, ask
         chutney to output them. Requires a recent version of chutney with
         the 21572 patch. Implements 21570.

     o Minor bugfix (control protocol):
       - The reply to a "GETINFO config/names" request via the control
         protocol now spells the type "Dependent" correctly. This is a
         breaking change in the control protocol. (The field seems to be
         ignored by the most common known controllers.) Fixes bug 18146;
         bugfix on 0.1.1.4-alpha.
       - The GETINFO extra-info/digest/<digest> command was broken because
         of a wrong base16 decode return value check, introduced when
         refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.

     o Minor bugfix (logging):
       - Don't recommend the use of Tor2web in non-anonymous mode.
         Recommending Tor2web is a bad idea because the client loses all
         anonymity. Tor2web should only be used in specific cases by users
         who *know* and understand the issues. Fixes bug 21294; bugfix
         on 0.2.9.3-alpha.

     o Minor bugfixes (bug resilience):
       - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
         19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
         Hans Jerry Illikainen.

     o Minor bugfixes (build):
       - Replace obsolete Autoconf macros with their modern equivalent and
         prevent similar issues in the future. Fixes bug 20990; bugfix
         on 0.1.0.1-rc.

     o Minor bugfixes (certificate expiration time):
       - Avoid using link certificates that don't become valid till some
         time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha

     o Minor bugfixes (client):
       - Always recover from failures in extend_info_from_node(), in an
         attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
         bugfix on 0.2.3.1-alpha.
       - When clients that use bridges start up with a cached consensus on
         disk, they were ignoring it and downloading a new one. Now they
         use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.

     o Minor bugfixes (code correctness):
       - Repair a couple of (unreachable or harmless) cases of the risky
         comparison-by-subtraction pattern that caused bug 21278.

     o Minor bugfixes (config):
       - Don't assert on startup when trying to get the options list and
         LearnCircuitBuildTimeout is set to 0: we are currently parsing the
         options so of course they aren't ready yet. Fixes bug 21062;
         bugfix on 0.2.9.3-alpha.

     o Minor bugfixes (configuration):
       - Accept non-space whitespace characters after the severity level in
         the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
       - Support "TByte" and "TBytes" units in options given in bytes.
         "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
         supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.

     o Minor bugfixes (configure, autoconf):
       - Rename the configure option --enable-expensive-hardening to
         --enable-fragile-hardening. Expensive hardening makes the tor
         daemon abort when some kinds of issues are detected. Thus, it
         makes tor more at risk of remote crashes but safer against RCE or
         heartbleed bug category. We now try to explain this issue in a
         message from the configure script. Fixes bug 21290; bugfix
         on 0.2.5.4-alpha.

     o Minor bugfixes (consensus weight):
       - Add new consensus method that initializes bw weights to 1 instead
         of 0. This prevents a zero weight from making it all the way to
         the end (happens in small testing networks) and causing an error.
         Fixes bug 14881; bugfix on 0.2.2.17-alpha.

     o Minor bugfixes (crash prevention):
       - Fix an (currently untriggerable, but potentially dangerous) crash
         bug when base32-encoding inputs whose sizes are not a multiple of
         5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.

     o Minor bugfixes (dead code):
       - Remove a redundant check for PidFile changes at runtime in
         options_transition_allowed(): this check is already performed
         regardless of whether the sandbox is active. Fixes bug 21123;
         bugfix on 0.2.5.4-alpha.

     o Minor bugfixes (descriptors):
       - Correctly recognise downloaded full descriptors as valid, even
         when using microdescriptors as circuits. This affects clients with
         FetchUselessDescriptors set, and may affect directory authorities.
         Fixes bug 20839; bugfix on 0.2.3.2-alpha.

     o Minor bugfixes (directory mirrors):
       - Allow relays to use directory mirrors without a DirPort: these
         relays need to be contacted over their ORPorts using a begindir
         connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
       - Clarify the message logged when a remote relay is unexpectedly
         missing an ORPort or DirPort: users were confusing this with a
         local port. Fixes another case of bug 20711; bugfix
         on 0.2.8.2-alpha.

     o Minor bugfixes (directory system):
       - Bridges and relays now use microdescriptors (like clients do)
         rather than old-style router descriptors. Now bridges will blend
         in with clients in terms of the circuits they build. Fixes bug
         6769; bugfix on 0.2.3.2-alpha.
       - Download all consensus flavors, descriptors, and authority
         certificates when FetchUselessDescriptors is set, regardless of
         whether tor is a directory cache or not. Fixes bug 20667; bugfix
         on all recent tor versions.

     o Minor bugfixes (documentation):
       - Update the tor manual page to document every option that can not
         be changed while tor is running. Fixes bug 21122.

     o Minor bugfixes (ed25519 certificates):
       - Correctly interpret ed25519 certificates that would expire some
         time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.

     o Minor bugfixes (fallback directories):
       - Avoid checking fallback candidates' DirPorts if they are down in
         OnionOO. When a relay operator has multiple relays, this
         prioritizes relays that are up over relays that are down. Fixes
         bug 20926; bugfix on 0.2.8.3-alpha.
       - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
         Fixes bug 20877; bugfix on 0.2.8.3-alpha.
       - Stop failing when a relay has no uptime data in
         updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.

     o Minor bugfixes (hidden service):
       - Clean up the code for expiring intro points with no associated
         circuits. It was causing, rarely, a service with some expiring
         introduction points to not open enough additional introduction
         points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
       - Resolve two possible underflows which could lead to creating and
         closing a lot of introduction point circuits in a non-stop loop.
         Fixes bug 21302; bugfix on 0.2.7.2-alpha.
       - Stop setting the torrc option HiddenServiceStatistics to "0" just
         because we're not a bridge or relay. Instead, we preserve whatever
         value the user set (or didn't set). Fixes bug 21150; bugfix
         on 0.2.6.2-alpha.

     o Minor bugfixes (hidden services):
       - Make hidden services check for failed intro point connections,
         even when they have exceeded their intro point creation limit.
         Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
       - Make hidden services with 8 to 10 introduction points check for
         failed circuits immediately after startup. Previously, they would
         wait for 5 minutes before performing their first checks. Fixes bug
         21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
       - Stop ignoring misconfigured hidden services. Instead, refuse to
         start tor until the misconfigurations have been corrected. Fixes
         bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
         and earlier.

     o Minor bugfixes (IPv6):
       - Make IPv6-using clients try harder to find an IPv6 directory
         server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
       - When IPv6 addresses have not been downloaded yet (microdesc
         consensus documents don't list relay IPv6 addresses), use hard-
         coded addresses for authorities, fallbacks, and configured
         bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
         20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.

     o Minor bugfixes (memory leak at exit):
       - Fix a small harmless memory leak at exit of the previously unused
         RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
         on 0.2.7.2-alpha.

     o Minor bugfixes (onion services):
       - Allow the number of introduction points to be as low as 0, rather
         than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.

     o Minor bugfixes (portability):
       - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
         It is supported by OpenBSD itself, and also by most OpenBSD
         variants (such as Bitrig). Fixes bug 20980; bugfix
         on 0.1.2.1-alpha.

     o Minor bugfixes (portability, also in 0.2.9.9):
       - Avoid crashing when Tor is built using headers that contain
         CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
         without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
         on 0.2.9.1-alpha.
       - Fix Libevent detection on platforms without Libevent 1 headers
         installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.

     o Minor bugfixes (relay):
       - Avoid a double-marked-circuit warning that could happen when we
         receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
         on 0.1.0.1-rc.
       - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
         initializing the keys would reset the DataDirectory to 0700
         instead of 0750 even if DataDirectoryGroupReadable was set to 1.
         Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".

     o Minor bugfixes (testing):
       - Fix Raspbian build issues related to missing socket errno in
         test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch by "hein".
       - Remove undefined behavior from the backtrace generator by removing
         its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
       - Use bash in src/test/test-network.sh. This ensures we reliably
         call chutney's newer tools/test-network.sh when available. Fixes
         bug 21562; bugfix on 0.2.9.1-alpha.

     o Minor bugfixes (tor-resolve):
       - The tor-resolve command line tool now rejects hostnames over 255
         characters in length. Previously, it would silently truncate them,
         which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
         Patch by "junglefowl".

     o Minor bugfixes (unit tests):
       - Allow the unit tests to pass even when DNS lookups of bogus
         addresses do not fail as expected. Fixes bug 20862 and 20863;
         bugfix on unit tests introduced in 0.2.8.1-alpha
         through 0.2.9.4-alpha.

     o Minor bugfixes (util):
       - When finishing writing a file to disk, if we were about to replace
         the file with the temporary file created before and we fail to
         replace it, remove the temporary file so it doesn't stay on disk.
         Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.

     o Minor bugfixes (Windows services):
       - Be sure to initialize the monotonic time subsystem before using
         it, even when running as an NT service. Fixes bug 21356; bugfix
         on 0.2.9.1-alpha.

     o Minor bugfixes (Windows):
       - Check for getpagesize before using it to mmap files. This fixes
         compilation in some MinGW environments. Fixes bug 20530; bugfix on
         0.1.2.1-alpha. Reported by "ice".

     o Code simplification and refactoring:
       - Abolish all global guard context in entrynodes.c; replace with new
         guard_selection_t structure as preparation for proposal 271.
         Closes ticket 19858.
       - Extract magic numbers in circuituse.c into defined variables.
       - Introduce rend_service_is_ephemeral() that tells if given onion
         service is ephemeral. Replace unclear NULL-checkings for service
         directory with this function. Closes ticket 20526.
       - Refactor circuit_is_available_for_use to remove unnecessary check.
       - Refactor circuit_predict_and_launch_new for readability and
         testability. Closes ticket 18873.
       - Refactor code to manipulate global_origin_circuit_list into
         separate functions. Closes ticket 20921.
       - Refactor large if statement in purpose_needs_anonymity to use
         switch statement instead. Closes part of ticket 20077.
       - Refactor the hashing API to return negative values for errors, as
         is done as throughout the codebase. Closes ticket 20717.
       - Remove data structures that were used to index or_connection
         objects by their RSA identity digests. These structures are fully
         redundant with the similar structures used in the
         channel abstraction.
       - Remove duplicate code in the channel_write_*cell() functions.
         Closes ticket 13827; patch from Pingl.
       - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
         use only purpose_needs_anonymity. Closes part of ticket 20077.
       - The code to generate and parse EXTEND and EXTEND2 cells has been
         replaced with code automatically generated by the
         "trunnel" utility.

     o Documentation (formatting):
       - Clean up formatting of tor.1 man page and HTML doc, where <pre>
         blocks were incorrectly appearing. Closes ticket 20885.

     o Documentation (man page):
       - Clarify many options in tor.1 and add some min/max values for
         HiddenService options. Closes ticket 21058.

     o Documentation:
       - Change '1' to 'weight_scale' in consensus bw weights calculation
         comments, as that is reality. Closes ticket 20273. Patch
         from pastly.
       - Clarify that when ClientRejectInternalAddresses is enabled (which
         is the default), multicast DNS hostnames for machines on the local
         network (of the form *.local) are also rejected. Closes
         ticket 17070.
       - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
         250 KBytes to 2 MBytes. Fixes bug 20435; bugfix on 0.2.5.6-alpha.
       - Include the "TBits" unit in Tor's man page. Fixes part of bug
         20622; bugfix on 0.2.5.1-alpha.
       - Small fixes to the fuzzing documentation. Closes ticket 21472.
       - Stop the man page from incorrectly stating that HiddenServiceDir
         must already exist. Fixes 20486.
       - Update the description of the directory server options in the
         manual page, to clarify that a relay no longer needs to set
         DirPort in order to be a directory cache. Closes ticket 21720.

     o Removed features:
       - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
         limit for relays running on a single IP applies to authority IP
         addresses as well as to non-authority IP addresses. Closes
         ticket 20960.
       - The UseDirectoryGuards torrc option no longer exists: all users
         that use entry guards will also use directory guards. Related to
         proposal 271; implements part of ticket 20831.

     o Testing:
       - Add tests for networkstatus_compute_bw_weights_v10.
       - Add unit tests circuit_predict_and_launch_new.
       - Extract dummy_origin_circuit_new so it can be used by other
         test functions.
       - New unit tests for tor_htonll(). Closes ticket 19563. Patch
         from "overcaffeinated".
       - Perform the coding style checks when running the tests and fail
         when coding style violations are found. Closes ticket 5500.

Revision 1.80: download - view: text, markup, annotated - select for diffs
Tue May 2 11:16:02 2017 UTC (7 years, 7 months ago) by wiz
Branches: MAIN
Diff to: previous 1.79: preferred, colored
Changes since revision 1.79: +5 -5 lines
Updated tor to 0.3.0.6.

Changes in version 0.3.0.6 - 2017-04-26
  Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.

  With the 0.3.0 series, clients and relays now use Ed25519 keys to
  authenticate their link connections to relays, rather than the old
  RSA1024 keys that they used before. (Circuit crypto has been
  Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
  the guard selection and replacement algorithm to behave more robustly
  in the presence of unreliable networks, and to resist guard-
  capture attacks.

  This series also includes numerous other small features and bugfixes,
  along with more groundwork for the upcoming hidden-services revamp.

  Per our stable release policy, we plan to support the Tor 0.3.0
  release series for at least the next nine months, or for three months
  after the first stable release of the 0.3.1 series: whichever is
  longer. If you need a release with long-term support, we recommend
  that you stay with the 0.2.9 series.

  Below are the changes since 0.2.9.10. For a list of only the changes
  since 0.3.0.5-rc, see the ChangeLog file.

  o Major features (directory authority, security):
    - The default for AuthDirPinKeys is now 1: directory authorities
      will reject relays where the RSA identity key matches a previously
      seen value, but the Ed25519 key has changed. Closes ticket 18319.

  o Major features (guard selection algorithm):
    - Tor's guard selection algorithm has been redesigned from the
      ground up, to better support unreliable networks and restrictive
      sets of entry nodes, and to better resist guard-capture attacks by
      hostile local networks. Implements proposal 271; closes
      ticket 19877.

  o Major features (next-generation hidden services):
    - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
      prop224 aka "Next Generation Hidden Services". Service and clients
      don't use this functionality yet. Closes ticket 19043. Based on
      initial code by Alec Heifetz.
    - Relays now support the HSDir version 3 protocol, so that they can
      can store and serve v3 descriptors. This is part of the next-
      generation onion service work detailled in proposal 224. Closes
      ticket 17238.

  o Major features (protocol, ed25519 identity keys):
    - Clients now support including Ed25519 identity keys in the EXTEND2
      cells they generate. By default, this is controlled by a consensus
      parameter, currently disabled. You can turn this feature on for
      testing by setting ExtendByEd25519ID in your configuration. This
      might make your traffic appear different than the traffic
      generated by other users, however. Implements part of ticket
      15056; part of proposal 220.
    - Relays now understand requests to extend to other relays by their
      Ed25519 identity keys. When an Ed25519 identity key is included in
      an EXTEND2 cell, the relay will only extend the circuit if the
      other relay can prove ownership of that identity. Implements part
      of ticket 15056; part of proposal 220.
    - Relays now use Ed25519 to prove their Ed25519 identities and to
      one another, and to clients. This algorithm is faster and more
      secure than the RSA-based handshake we've been doing until now.
      Implements the second big part of proposal 220; Closes
      ticket 15055.

  o Major features (security):
    - Change the algorithm used to decide DNS TTLs on client and server
      side, to better resist DNS-based correlation attacks like the
      DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
      Feamster. Now relays only return one of two possible DNS TTL
      values, and clients are willing to believe DNS TTL values up to 3
      hours long. Closes ticket 19769.

  o Major bugfixes (client, onion service, also in 0.2.9.9):
    - Fix a client-side onion service reachability bug, where multiple
      socks requests to an onion service (or a single slow request)
      could cause us to mistakenly mark some of the service's
      introduction points as failed, and we cache that failure so
      eventually we run out and can't reach the service. Also resolves a
      mysterious "Remote server sent bogus reason code 65021" log
      warning. The bug was introduced in ticket 17218, where we tried to
      remember the circuit end reason as a uint16_t, which mangled
      negative values. Partially fixes bug 21056 and fixes bug 20307;
      bugfix on 0.2.8.1-alpha.

  o Major bugfixes (crash, directory connections):
    - Fix a rare crash when sending a begin cell on a circuit whose
      linked directory connection had already been closed. Fixes bug
      21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.

  o Major bugfixes (directory authority):
    - During voting, when marking a relay as a probable sybil, do not
      clear its BadExit flag: sybils can still be bad in other ways
      too. (We still clear the other flags.) Fixes bug 21108; bugfix
      on 0.2.0.13-alpha.

  o Major bugfixes (DNS):
    - Fix a bug that prevented exit nodes from caching DNS records for
      more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.

  o Major bugfixes (IPv6 Exits):
    - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
      any IPv6 addresses. Instead, only reject a port over IPv6 if the
      exit policy rejects that port on more than an IPv6 /16 of
      addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
      which rejected a relay's own IPv6 address by default. Fixes bug
      21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.

  o Major bugfixes (parsing):
    - Fix an integer underflow bug when comparing malformed Tor
      versions. This bug could crash Tor when built with
      --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
      0.2.9.8, which were built with -ftrapv by default. In other cases
      it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
      on 0.0.8pre1. Found by OSS-Fuzz.
    - When parsing a malformed content-length field from an HTTP
      message, do not read off the end of the buffer. This bug was a
      potential remote denial-of-service attack against Tor clients and
      relays. A workaround was released in October 2016, to prevent this
      bug from crashing Tor. This is a fix for the underlying issue,
      which should no longer matter (if you applied the earlier patch).
      Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
      using AFL (http://lcamtuf.coredump.cx/afl/).

  o Major bugfixes (scheduler):
    - Actually compare circuit policies in ewma_cmp_cmux(). This bug
      caused the channel scheduler to behave more or less randomly,
      rather than preferring channels with higher-priority circuits.
      Fixes bug 20459; bugfix on 0.2.6.2-alpha.

  o Major bugfixes (security, also in 0.2.9.9):
    - Downgrade the "-ftrapv" option from "always on" to "only on when
      --enable-expensive-hardening is provided." This hardening option,
      like others, can turn survivable bugs into crashes--and having it
      on by default made a (relatively harmless) integer overflow bug
      into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
      bugfix on 0.2.9.1-alpha.

  o Minor feature (client):
    - Enable IPv6 traffic on the SocksPort by default. To disable this,
      a user will have to specify "NoIPv6Traffic". Closes ticket 21269.

  o Minor feature (fallback scripts):
    - Add a check_existing mode to updateFallbackDirs.py, which checks
      if fallbacks in the hard-coded list are working. Closes ticket
      20174. Patch by haxxpop.

  o Minor feature (protocol versioning):
    - Add new protocol version for proposal 224. HSIntro now advertises
      version "3-4" and HSDir version "1-2". Fixes ticket 20656.

  o Minor features (ciphersuite selection):
    - Allow relays to accept a wider range of ciphersuites, including
      chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
    - Clients now advertise a list of ciphersuites closer to the ones
      preferred by Firefox. Closes part of ticket 15426.

  o Minor features (controller):
    - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
      shared-random values to the controller. Closes ticket 19925.
    - When HSFETCH arguments cannot be parsed, say "Invalid argument"
      rather than "unrecognized." Closes ticket 20389; patch from
      Ivan Markin.

  o Minor features (controller, configuration):
    - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
      and so on, now comes with a __*Port variant that will not be saved
      to the torrc file by the controller's SAVECONF command. This
      change allows TorBrowser to set up a single-use domain socket for
      each time it launches Tor. Closes ticket 20956.
    - The GETCONF command can now query options that may only be
      meaningful in context-sensitive lists. This allows the controller
      to query the mixed SocksPort/__SocksPort style options introduced
      in feature 20956. Implements ticket 21300.

  o Minor features (diagnostic, directory client):
    - Warn when we find an unexpected inconsistency in directory
      download status objects. Prevents some negative consequences of
      bug 20593.

  o Minor features (directory authorities):
    - Directory authorities now reject descriptors that claim to be
      malformed versions of Tor. Helps prevent exploitation of
      bug 21278.
    - Reject version numbers with components that exceed INT32_MAX.
      Otherwise 32-bit and 64-bit platforms would behave inconsistently.
      Fixes bug 21450; bugfix on 0.0.8pre1.

  o Minor features (directory authority):
    - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
      default) to control whether authorities should try to probe relays
      by their Ed25519 link keys. This option will go away in a few
      releases--unless we encounter major trouble in our ed25519 link
      protocol rollout, in which case it will serve as a safety option.

  o Minor features (directory cache):
    - Relays and bridges will now refuse to serve the consensus they
      have if they know it is too old for a client to use. Closes
      ticket 20511.

  o Minor features (ed25519 link handshake):
    - Advertise support for the ed25519 link handshake using the
      subprotocol-versions mechanism, so that clients can tell which
      relays can identity themselves by Ed25519 ID. Closes ticket 20552.

  o Minor features (entry guards):
    - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
      break regression tests.
    - Require UseEntryGuards when UseBridges is set, in order to make
      sure bridges aren't bypassed. Resolves ticket 20502.

  o Minor features (fallback directories):
    - Allow 3 fallback relays per operator, which is safe now that we
      are choosing 200 fallback relays. Closes ticket 20912.
    - Annotate updateFallbackDirs.py with the bandwidth and consensus
      weight for each candidate fallback. Closes ticket 20878.
    - Display the relay fingerprint when downloading consensuses from
      fallbacks. Closes ticket 20908.
    - Exclude relays affected by bug 20499 from the fallback list.
      Exclude relays from the fallback list if they are running versions
      known to be affected by bug 20499, or if in our tests they deliver
      a stale consensus (i.e. one that expired more than 24 hours ago).
      Closes ticket 20539.
    - Make it easier to change the output sort order of fallbacks.
      Closes ticket 20822.
    - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
      ticket 18828.
    - Require fallback directories to have the same address and port for
      7 days (now that we have enough relays with this stability).
      Relays whose OnionOO stability timer is reset on restart by bug
      18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
      this issue. Closes ticket 20880; maintains short-term fix
      in 0.2.8.2-alpha.
    - Require fallbacks to have flags for 90% of the time (weighted
      decaying average), rather than 95%. This allows at least 73% of
      clients to bootstrap in the first 5 seconds without contacting an
      authority. Part of ticket 18828.
    - Select 200 fallback directories for each release. Closes
      ticket 20881.

  o Minor features (fingerprinting resistence, authentication):
    - Extend the length of RSA keys used for TLS link authentication to
      2048 bits. (These weren't used for forward secrecy; for forward
      secrecy, we used P256.) Closes ticket 13752.

  o Minor features (geoip):
    - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
      Country database.

  o Minor features (geoip, also in 0.2.9.9):
    - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
      Country database.

  o Minor features (infrastructure):
    - Implement smartlist_add_strdup() function. Replaces the use of
      smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.

  o Minor features (linting):
    - Enhance the changes file linter to warn on Tor versions that are
      prefixed with "tor-". Closes ticket 21096.

  o Minor features (logging):
    - In several places, describe unset ed25519 keys as "<unset>",
      rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.

  o Minor features (portability, compilation):
    - Autoconf now checks to determine if OpenSSL structures are opaque,
      instead of explicitly checking for OpenSSL version numbers. Part
      of ticket 21359.
    - Support building with recent LibreSSL code that uses opaque
      structures. Closes ticket 21359.

  o Minor features (relay):
    - We now allow separation of exit and relay traffic to different
      source IP addresses, using the OutboundBindAddressExit and
      OutboundBindAddressOR options respectively. Closes ticket 17975.
      Written by Michael Sonntag.

  o Minor features (reliability, crash):
    - Try better to detect problems in buffers where they might grow (or
      think they have grown) over 2 GB in size. Diagnostic for
      bug 21369.

  o Minor features (testing):
    - During 'make test-network-all', if tor logs any warnings, ask
      chutney to output them. Requires a recent version of chutney with
      the 21572 patch. Implements 21570.

  o Minor bugfix (control protocol):
    - The reply to a "GETINFO config/names" request via the control
      protocol now spells the type "Dependent" correctly. This is a
      breaking change in the control protocol. (The field seems to be
      ignored by the most common known controllers.) Fixes bug 18146;
      bugfix on 0.1.1.4-alpha.
    - The GETINFO extra-info/digest/<digest> command was broken because
      of a wrong base16 decode return value check, introduced when
      refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.

  o Minor bugfix (logging):
    - Don't recommend the use of Tor2web in non-anonymous mode.
      Recommending Tor2web is a bad idea because the client loses all
      anonymity. Tor2web should only be used in specific cases by users
      who *know* and understand the issues. Fixes bug 21294; bugfix
      on 0.2.9.3-alpha.

  o Minor bugfixes (bug resilience):
    - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
      19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
      Hans Jerry Illikainen.

  o Minor bugfixes (build):
    - Replace obsolete Autoconf macros with their modern equivalent and
      prevent similar issues in the future. Fixes bug 20990; bugfix
      on 0.1.0.1-rc.

  o Minor bugfixes (certificate expiration time):
    - Avoid using link certificates that don't become valid till some
      time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha

  o Minor bugfixes (client):
    - Always recover from failures in extend_info_from_node(), in an
      attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
      bugfix on 0.2.3.1-alpha.
    - When clients that use bridges start up with a cached consensus on
      disk, they were ignoring it and downloading a new one. Now they
      use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.

  o Minor bugfixes (code correctness):
    - Repair a couple of (unreachable or harmless) cases of the risky
      comparison-by-subtraction pattern that caused bug 21278.

  o Minor bugfixes (config):
    - Don't assert on startup when trying to get the options list and
      LearnCircuitBuildTimeout is set to 0: we are currently parsing the
      options so of course they aren't ready yet. Fixes bug 21062;
      bugfix on 0.2.9.3-alpha.

  o Minor bugfixes (configuration):
    - Accept non-space whitespace characters after the severity level in
      the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
    - Support "TByte" and "TBytes" units in options given in bytes.
      "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
      supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.

  o Minor bugfixes (configure, autoconf):
    - Rename the configure option --enable-expensive-hardening to
      --enable-fragile-hardening. Expensive hardening makes the tor
      daemon abort when some kinds of issues are detected. Thus, it
      makes tor more at risk of remote crashes but safer against RCE or
      heartbleed bug category. We now try to explain this issue in a
      message from the configure script. Fixes bug 21290; bugfix
      on 0.2.5.4-alpha.

  o Minor bugfixes (consensus weight):
    - Add new consensus method that initializes bw weights to 1 instead
      of 0. This prevents a zero weight from making it all the way to
      the end (happens in small testing networks) and causing an error.
      Fixes bug 14881; bugfix on 0.2.2.17-alpha.

  o Minor bugfixes (crash prevention):
    - Fix an (currently untriggerable, but potentially dangerous) crash
      bug when base32-encoding inputs whose sizes are not a multiple of
      5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.

  o Minor bugfixes (dead code):
    - Remove a redundant check for PidFile changes at runtime in
      options_transition_allowed(): this check is already performed
      regardless of whether the sandbox is active. Fixes bug 21123;
      bugfix on 0.2.5.4-alpha.

  o Minor bugfixes (descriptors):
    - Correctly recognise downloaded full descriptors as valid, even
      when using microdescriptors as circuits. This affects clients with
      FetchUselessDescriptors set, and may affect directory authorities.
      Fixes bug 20839; bugfix on 0.2.3.2-alpha.

  o Minor bugfixes (directory mirrors):
    - Allow relays to use directory mirrors without a DirPort: these
      relays need to be contacted over their ORPorts using a begindir
      connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
    - Clarify the message logged when a remote relay is unexpectedly
      missing an ORPort or DirPort: users were confusing this with a
      local port. Fixes another case of bug 20711; bugfix
      on 0.2.8.2-alpha.

  o Minor bugfixes (directory system):
    - Bridges and relays now use microdescriptors (like clients do)
      rather than old-style router descriptors. Now bridges will blend
      in with clients in terms of the circuits they build. Fixes bug
      6769; bugfix on 0.2.3.2-alpha.
    - Download all consensus flavors, descriptors, and authority
      certificates when FetchUselessDescriptors is set, regardless of
      whether tor is a directory cache or not. Fixes bug 20667; bugfix
      on all recent tor versions.

  o Minor bugfixes (documentation):
    - Update the tor manual page to document every option that can not
      be changed while tor is running. Fixes bug 21122.

  o Minor bugfixes (ed25519 certificates):
    - Correctly interpret ed25519 certificates that would expire some
      time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (fallback directories):
    - Avoid checking fallback candidates' DirPorts if they are down in
      OnionOO. When a relay operator has multiple relays, this
      prioritizes relays that are up over relays that are down. Fixes
      bug 20926; bugfix on 0.2.8.3-alpha.
    - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
      Fixes bug 20877; bugfix on 0.2.8.3-alpha.
    - Stop failing when a relay has no uptime data in
      updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (hidden service):
    - Clean up the code for expiring intro points with no associated
      circuits. It was causing, rarely, a service with some expiring
      introduction points to not open enough additional introduction
      points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
    - Resolve two possible underflows which could lead to creating and
      closing a lot of introduction point circuits in a non-stop loop.
      Fixes bug 21302; bugfix on 0.2.7.2-alpha.
    - Stop setting the torrc option HiddenServiceStatistics to "0" just
      because we're not a bridge or relay. Instead, we preserve whatever
      value the user set (or didn't set). Fixes bug 21150; bugfix
      on 0.2.6.2-alpha.

  o Minor bugfixes (hidden services):
    - Make hidden services check for failed intro point connections,
      even when they have exceeded their intro point creation limit.
      Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
    - Make hidden services with 8 to 10 introduction points check for
      failed circuits immediately after startup. Previously, they would
      wait for 5 minutes before performing their first checks. Fixes bug
      21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
    - Stop ignoring misconfigured hidden services. Instead, refuse to
      start tor until the misconfigurations have been corrected. Fixes
      bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
      and earlier.

  o Minor bugfixes (IPv6):
    - Make IPv6-using clients try harder to find an IPv6 directory
      server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
    - When IPv6 addresses have not been downloaded yet (microdesc
      consensus documents don't list relay IPv6 addresses), use hard-
      coded addresses for authorities, fallbacks, and configured
      bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
      20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.

  o Minor bugfixes (memory leak at exit):
    - Fix a small harmless memory leak at exit of the previously unused
      RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
      on 0.2.7.2-alpha.

  o Minor bugfixes (onion services):
    - Allow the number of introduction points to be as low as 0, rather
      than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (portability):
    - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
      It is supported by OpenBSD itself, and also by most OpenBSD
      variants (such as Bitrig). Fixes bug 20980; bugfix
      on 0.1.2.1-alpha.

  o Minor bugfixes (portability, also in 0.2.9.9):
    - Avoid crashing when Tor is built using headers that contain
      CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
      without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
      on 0.2.9.1-alpha.
    - Fix Libevent detection on platforms without Libevent 1 headers
      installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.

  o Minor bugfixes (relay):
    - Avoid a double-marked-circuit warning that could happen when we
      receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
      on 0.1.0.1-rc.
    - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
      initializing the keys would reset the DataDirectory to 0700
      instead of 0750 even if DataDirectoryGroupReadable was set to 1.
      Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".

  o Minor bugfixes (testing):
    - Fix Raspbian build issues related to missing socket errno in
      test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch by "hein".
    - Remove undefined behavior from the backtrace generator by removing
      its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
    - Use bash in src/test/test-network.sh. This ensures we reliably
      call chutney's newer tools/test-network.sh when available. Fixes
      bug 21562; bugfix on 0.2.9.1-alpha.

  o Minor bugfixes (tor-resolve):
    - The tor-resolve command line tool now rejects hostnames over 255
      characters in length. Previously, it would silently truncate them,
      which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
      Patch by "junglefowl".

  o Minor bugfixes (unit tests):
    - Allow the unit tests to pass even when DNS lookups of bogus
      addresses do not fail as expected. Fixes bug 20862 and 20863;
      bugfix on unit tests introduced in 0.2.8.1-alpha
      through 0.2.9.4-alpha.

  o Minor bugfixes (util):
    - When finishing writing a file to disk, if we were about to replace
      the file with the temporary file created before and we fail to
      replace it, remove the temporary file so it doesn't stay on disk.
      Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.

  o Minor bugfixes (Windows services):
    - Be sure to initialize the monotonic time subsystem before using
      it, even when running as an NT service. Fixes bug 21356; bugfix
      on 0.2.9.1-alpha.

  o Minor bugfixes (Windows):
    - Check for getpagesize before using it to mmap files. This fixes
      compilation in some MinGW environments. Fixes bug 20530; bugfix on
      0.1.2.1-alpha. Reported by "ice".

  o Code simplification and refactoring:
    - Abolish all global guard context in entrynodes.c; replace with new
      guard_selection_t structure as preparation for proposal 271.
      Closes ticket 19858.
    - Extract magic numbers in circuituse.c into defined variables.
    - Introduce rend_service_is_ephemeral() that tells if given onion
      service is ephemeral. Replace unclear NULL-checkings for service
      directory with this function. Closes ticket 20526.
    - Refactor circuit_is_available_for_use to remove unnecessary check.
    - Refactor circuit_predict_and_launch_new for readability and
      testability. Closes ticket 18873.
    - Refactor code to manipulate global_origin_circuit_list into
      separate functions. Closes ticket 20921.
    - Refactor large if statement in purpose_needs_anonymity to use
      switch statement instead. Closes part of ticket 20077.
    - Refactor the hashing API to return negative values for errors, as
      is done as throughout the codebase. Closes ticket 20717.
    - Remove data structures that were used to index or_connection
      objects by their RSA identity digests. These structures are fully
      redundant with the similar structures used in the
      channel abstraction.
    - Remove duplicate code in the channel_write_*cell() functions.
      Closes ticket 13827; patch from Pingl.
    - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
      use only purpose_needs_anonymity. Closes part of ticket 20077.
    - The code to generate and parse EXTEND and EXTEND2 cells has been
      replaced with code automatically generated by the
      "trunnel" utility.

  o Documentation (formatting):
    - Clean up formatting of tor.1 man page and HTML doc, where <pre>
      blocks were incorrectly appearing. Closes ticket 20885.

  o Documentation (man page):
    - Clarify many options in tor.1 and add some min/max values for
      HiddenService options. Closes ticket 21058.

  o Documentation:
    - Change '1' to 'weight_scale' in consensus bw weights calculation
      comments, as that is reality. Closes ticket 20273. Patch
      from pastly.
    - Clarify that when ClientRejectInternalAddresses is enabled (which
      is the default), multicast DNS hostnames for machines on the local
      network (of the form *.local) are also rejected. Closes
      ticket 17070.
    - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
      250 KBytes to 2 MBytes. Fixes bug 20435; bugfix on 0.2.5.6-alpha.
    - Include the "TBits" unit in Tor's man page. Fixes part of bug
      20622; bugfix on 0.2.5.1-alpha.
    - Small fixes to the fuzzing documentation. Closes ticket 21472.
    - Stop the man page from incorrectly stating that HiddenServiceDir
      must already exist. Fixes 20486.
    - Update the description of the directory server options in the
      manual page, to clarify that a relay no longer needs to set
      DirPort in order to be a directory cache. Closes ticket 21720.

  o Removed features:
    - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
      limit for relays running on a single IP applies to authority IP
      addresses as well as to non-authority IP addresses. Closes
      ticket 20960.
    - The UseDirectoryGuards torrc option no longer exists: all users
      that use entry guards will also use directory guards. Related to
      proposal 271; implements part of ticket 20831.

  o Testing:
    - Add tests for networkstatus_compute_bw_weights_v10.
    - Add unit tests circuit_predict_and_launch_new.
    - Extract dummy_origin_circuit_new so it can be used by other
      test functions.
    - New unit tests for tor_htonll(). Closes ticket 19563. Patch
      from "overcaffeinated".
    - Perform the coding style checks when running the tests and fail
      when coding style violations are found. Closes ticket 5500.

Revision 1.79: download - view: text, markup, annotated - select for diffs
Sun Mar 5 14:55:15 2017 UTC (7 years, 9 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2017Q1-base
Branch point for: pkgsrc-2017Q1
Diff to: previous 1.78: preferred, colored
Changes since revision 1.78: +5 -5 lines
Updated tor to 0.2.9.10.

Changes in version 0.2.9.10 - 2017-03-01
  Tor 0.2.9.10 backports a security fix for users who build Tor with
  the --enable-expensive-hardening option. It also includes fixes for
  some major issues affecting directory authorities, LibreSSL
  compatibility, and IPv6 correctness.

  The Tor 0.2.9.x release series is now marked as a long-term-support
  series.  We intend to backport security fixes to 0.2.9.x until at
  least January of 2020.

  o Major bugfixes (directory authority, 0.3.0.3-alpha):
    - During voting, when marking a relay as a probable sybil, do not
      clear its BadExit flag: sybils can still be bad in other ways
      too. (We still clear the other flags.) Fixes bug 21108; bugfix
      on 0.2.0.13-alpha.

  o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
    - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
      any IPv6 addresses. Instead, only reject a port over IPv6 if the
      exit policy rejects that port on more than an IPv6 /16 of
      addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
      which rejected a relay's own IPv6 address by default. Fixes bug
      21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.

  o Major bugfixes (parsing, also in 0.3.0.4-rc):
    - Fix an integer underflow bug when comparing malformed Tor
      versions. This bug could crash Tor when built with
      --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
      0.2.9.8, which were built with -ftrapv by default. In other cases
      it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
      on 0.0.8pre1. Found by OSS-Fuzz.

  o Minor features (directory authorities, also in 0.3.0.4-rc):
    - Directory authorities now reject descriptors that claim to be
      malformed versions of Tor. Helps prevent exploitation of
      bug 21278.
    - Reject version numbers with components that exceed INT32_MAX.
      Otherwise 32-bit and 64-bit platforms would behave inconsistently.
      Fixes bug 21450; bugfix on 0.0.8pre1.

  o Minor features (geoip):
    - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
      Country database.

  o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
    - Autoconf now checks to determine if OpenSSL structures are opaque,
      instead of explicitly checking for OpenSSL version numbers. Part
      of ticket 21359.
    - Support building with recent LibreSSL code that uses opaque
      structures. Closes ticket 21359.

  o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
    - Repair a couple of (unreachable or harmless) cases of the risky
      comparison-by-subtraction pattern that caused bug 21278.

  o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
    - The tor-resolve command line tool now rejects hostnames over 255
      characters in length. Previously, it would silently truncate them,
      which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
      Patch by "junglefowl".

Revision 1.76.2.1: download - view: text, markup, annotated - select for diffs
Tue Jan 24 21:19:39 2017 UTC (7 years, 10 months ago) by bsiegert
Branches: pkgsrc-2016Q4
Diff to: previous 1.76: preferred, colored; next MAIN 1.77: preferred, colored
Changes since revision 1.76: +5 -5 lines
Pullup ticket #5200 - requested by wiz
net/tor: security fix

Revisions pulled up:
- net/tor/Makefile                                              1.116-1.117
- net/tor/distinfo                                              1.77-1.78

---
   Module Name:	pkgsrc
   Committed By:	maya
   Date:		Sun Jan  8 12:50:41 UTC 2017

   Modified Files:
   	pkgsrc/net/tor: Makefile distinfo

   Log Message:
   tor: update to 0.2.9.8
   Updated provided by reezer (maintainer) in PR pkg/51745

   Changes in version 0.2.9.8 - 2016-12-19
    Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.

    The Tor 0.2.9 series makes mandatory a number of security features
    that were formerly optional. It includes support for a new shared-
    randomness protocol that will form the basis for next generation
    hidden services, includes a single-hop hidden service mode for
    optimizing .onion services that don't actually want to be hidden,
    tries harder not to overload the directory authorities with excessive
    downloads, and supports a better protocol versioning scheme for
    improved compatibility with other implementations of the Tor protocol.

    And of course, there are numerous other bugfixes and improvements.

    This release also includes a fix for a medium-severity issue (bug
    21018 below) where Tor clients could crash when attempting to visit a
    hostile hidden service. Clients are recommended to upgrade as packages
    become available for their systems.

    Below are listed the changes since Tor 0.2.8.11.  For a list of
    changes since 0.2.9.7-rc, see the ChangeLog file.

    o New system requirements:
      - When building with OpenSSL, Tor now requires version 1.0.1 or
        later. OpenSSL 1.0.0 and earlier are no longer supported by the
        OpenSSL team, and should not be used. Closes ticket 20303.
      - Tor now requires Libevent version 2.0.10-stable or later. Older
        versions of Libevent have less efficient backends for several
        platforms, and lack the DNS code that we use for our server-side
        DNS support. This implements ticket 19554.
      - Tor now requires zlib version 1.2 or later, for security,
        efficiency, and (eventually) gzip support. (Back when we started,
        zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
        released in 2003. We recommend the latest version.)

    o Deprecated features:
      - A number of DNS-cache-related sub-options for client ports are now
        deprecated for security reasons, and may be removed in a future
        version of Tor. (We believe that client-side DNS caching is a bad
        idea for anonymity, and you should not turn it on.) The options
        are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
        UseIPv4Cache, and UseIPv6Cache.
      - A number of options are deprecated for security reasons, and may
        be removed in a future version of Tor. The options are:
        AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
        AllowSingleHopExits, ClientDNSRejectInternalAddresses,
        CloseHSClientCircuitsImmediatelyOnTimeout,
        CloseHSServiceRendCircuitsImmediatelyOnTimeout,
        ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
        UseNTorHandshake, and WarnUnsafeSocks.
      - The *ListenAddress options are now deprecated as unnecessary: the
        corresponding *Port options should be used instead. These options
        may someday be removed. The affected options are:
        ControlListenAddress, DNSListenAddress, DirListenAddress,
        NATDListenAddress, ORListenAddress, SocksListenAddress,
        and TransListenAddress.

    o Major bugfixes (parsing, security, new since 0.2.9.7-rc):
      - Fix a bug in parsing that could cause clients to read a single
        byte past the end of an allocated region. This bug could be used
        to cause hardened clients (built with --enable-expensive-hardening)
        to crash if they tried to visit a hostile hidden service. Non-
        hardened clients are only affected depending on the details of
        their platform's memory allocator. Fixes bug 21018; bugfix on
        0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
        2016-12-002 and as CVE-2016-1254.

    o Major features (build, hardening):
      - Tor now builds with -ftrapv by default on compilers that support
        it. This option detects signed integer overflow (which C forbids),
        and turns it into a hard-failure. We do not apply this option to
        code that needs to run in constant time to avoid side-channels;
        instead, we use -fwrapv in that code. Closes ticket 17983.
      - When --enable-expensive-hardening is selected, stop applying the
        clang/gcc sanitizers to code that needs to run in constant time.
        Although we are aware of no introduced side-channels, we are not
        able to prove that there are none. Related to ticket 17983.

    o Major features (circuit building, security):
      - Authorities, relays, and clients now require ntor keys in all
        descriptors, for all hops (except for rare hidden service protocol
        cases), for all circuits, and for all other roles. Part of
        ticket 19163.
      - Authorities, relays, and clients only use ntor, except for
        rare cases in the hidden service protocol. Part of ticket 19163.

    o Major features (compilation):
      - Our big list of extra GCC warnings is now enabled by default when
        building with GCC (or with anything like Clang that claims to be
        GCC-compatible). To make all warnings into fatal compilation
        errors, pass --enable-fatal-warnings to configure. Closes
        ticket 19044.
      - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
        turn on C and POSIX extensions. (Previously, we attempted to do
        this on an ad hoc basis.) Closes ticket 19139.

    o Major features (directory authorities, hidden services):
      - Directory authorities can now perform the shared randomness
        protocol specified by proposal 250. Using this protocol, directory
        authorities generate a global fresh random value every day. In the
        future, this value will be used by hidden services to select
        HSDirs. This release implements the directory authority feature;
        the hidden service side will be implemented in the future as part
        of proposal 224. Resolves ticket 16943; implements proposal 250.

    o Major features (downloading, random exponential backoff):
      - When we fail to download an object from a directory service, wait
        for an (exponentially increasing) randomized amount of time before
        retrying, rather than a fixed interval as we did before. This
        prevents a group of Tor instances from becoming too synchronized,
        or a single Tor instance from becoming too predictable, in its
        download schedule. Closes ticket 15942.

    o Major features (resource management):
      - Tor can now notice it is about to run out of sockets, and
        preemptively close connections of lower priority. (This feature is
        off by default for now, since the current prioritizing method is
        yet not mature enough. You can enable it by setting
        "DisableOOSCheck 0", but watch out: it might close some sockets
        you would rather have it keep.) Closes ticket 18640.

    o Major features (single-hop "hidden" services):
      - Add experimental HiddenServiceSingleHopMode and
        HiddenServiceNonAnonymousMode options. When both are set to 1,
        every hidden service on that Tor instance becomes a non-anonymous
        Single Onion Service. Single Onions make one-hop (direct)
        connections to their introduction and rendezvous points. One-hop
        circuits make Single Onion servers easily locatable, but clients
        remain location-anonymous. This is compatible with the existing
        hidden service implementation, and works on the current Tor
        network without any changes to older relays or clients. Implements
        proposal 260, completes ticket 17178. Patch by teor and asn.

    o Major features (subprotocol versions):
      - Tor directory authorities now vote on a set of recommended
        "subprotocol versions", and on a set of required subprotocol
        versions. Clients and relays that lack support for a _required_
        subprotocol version will not start; those that lack support for a
        _recommended_ subprotocol version will warn the user to upgrade.
        This change allows compatible implementations of the Tor protocol(s)
        to exist without pretending to be 100% bug-compatible with
        particular releases of Tor itself. Closes ticket 19958; implements
        part of proposal 264.

    o Major bugfixes (circuit building):
      - Hidden service client-to-intro-point and service-to-rendezvous-
        point circuits use the TAP key supplied by the protocol, to avoid
        epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.

    o Major bugfixes (download scheduling):
      - Avoid resetting download status for consensuses hourly, since we
        already have another, smarter retry mechanism. Fixes bug 8625;
        bugfix on 0.2.0.9-alpha.
      - If a consensus expires while we are waiting for certificates to
        download, stop waiting for certificates.
      - If we stop waiting for certificates less than a minute after we
        started downloading them, do not consider the certificate download
        failure a separate failure. Fixes bug 20533; bugfix
        on 0.2.0.9-alpha.
      - When using exponential backoff in test networks, use a lower
        exponent, so the delays do not vary as much. This helps test
        networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.

    o Major bugfixes (exit policies):
      - Avoid disclosing exit outbound bind addresses, configured port
        bind addresses, and local interface addresses in relay descriptors
        by default under ExitPolicyRejectPrivate. Instead, only reject
        these (otherwise unlisted) addresses if
        ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
        0.2.7.2-alpha. Patch by teor.

    o Major bugfixes (hidden services):
      - Allow Tor clients with appropriate controllers to work with
        FetchHidServDescriptors set to 0. Previously, this option also
        disabled descriptor cache lookup, thus breaking hidden services
        entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
      - Clients now require hidden services to include the TAP keys for
        their intro points in the hidden service descriptor. This prevents
        an inadvertent upgrade to ntor, which a malicious hidden service
        could use to distinguish clients by consensus version. Fixes bug
        20012; bugfix on 0.2.4.8-alpha. Patch by teor.

    o Major bugfixes (relay, resolver, logging):
      - For relays that don't know their own address, avoid attempting a
        local hostname resolve for each descriptor we download. This
        will cut down on the number of "Success: chose address 'x.x.x.x'"
        log lines, and also avoid confusing clock jumps if the resolver
        is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.

    o Minor features (port flags):
      - Add new flags to the *Port options to give finer control over which
        requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
        and the synthetic flag OnionTrafficOnly, which is equivalent to
        NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
        18693; patch by "teor".

    o Minor features (build, hardening):
      - Detect and work around a libclang_rt problem that would prevent
        clang from finding __mulodi4() on some 32-bit platforms, and thus
        keep -ftrapv from linking on those systems. Closes ticket 19079.
      - When building on a system without runtime support for the runtime
        hardening options, try to log a useful warning at configuration
        time, rather than an incomprehensible warning at link time. If
        expensive hardening was requested, this warning becomes an error.
        Closes ticket 18895.

    o Minor features (client, directory):
      - Since authorities now omit all routers that lack the Running and
        Valid flags, we assume that any relay listed in the consensus must
        have those flags. Closes ticket 20001; implements part of
        proposal 272.

    o Minor features (code safety):
      - In our integer-parsing functions, ensure that the maximum value we
        allow is no smaller than the minimum value. Closes ticket 19063;
        patch from "U+039b".

    o Minor features (compilation, portability):
      - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
        ticket 20241.

    o Minor features (config):
      - Warn users when descriptor and port addresses are inconsistent.
        Mitigates bug 13953; patch by teor.

    o Minor features (controller):
      - Allow controllers to configure basic client authorization on
        hidden services when they create them with the ADD_ONION controller
        command. Implements ticket 15588. Patch by "special".
      - Fire a STATUS_SERVER controller event whenever the hibernation
        status changes between "awake"/"soft"/"hard". Closes ticket 18685.
      - Implement new GETINFO queries for all downloads that use
        download_status_t to schedule retries. This allows controllers to
        examine the schedule for pending downloads. Closes ticket 19323.

    o Minor features (development tools, etags):
      - Teach the "make tags" Makefile target how to correctly find
        "MOCK_IMPL" function definitions. Patch from nherring; closes
        ticket 16869.

    o Minor features (directory authority):
      - After voting, if the authorities decide that a relay is not
        "Valid", they no longer include it in the consensus at all. Closes
        ticket 20002; implements part of proposal 272.
      - Directory authorities now only give the Guard flag to a relay if
        they are also giving it the Stable flag. This change allows us to
        simplify path selection for clients. It should have minimal effect
        in practice, since >99% of Guards already have the Stable flag.
        Implements ticket 18624.
      - Directory authorities now write their v3-status-votes file out to
        disk earlier in the consensus process, so we have a record of the
        votes even if we abort the consensus process. Resolves
        ticket 19036.

    o Minor features (fallback directory list, new since 0.2.9.7-rc):
      - Replace the 81 remaining fallbacks of the 100 originally
        introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
        fallbacks (123 new, 54 existing, 27 removed) generated in December
        2016. Resolves ticket 20170.

    o Minor features (hidden service):
      - Stop being so strict about the payload length of "rendezvous1"
        cells. We used to be locked in to the "TAP" handshake length, and
        now we can handle better handshakes like "ntor". Resolves
        ticket 18998.

    o Minor features (infrastructure, time):
      - Tor now includes an improved timer backend, so that we can
        efficiently support tens or hundreds of thousands of concurrent
        timers, as will be needed for some of our planned anti-traffic-
        analysis work. This code is based on William Ahern's "timeout.c"
        project, which implements a "tickless hierarchical timing wheel".
        Closes ticket 18365.
      - Tor now uses the operating system's monotonic timers (where
        available) for internal fine-grained timing. Previously we would
        look at the system clock, and then attempt to compensate for the
        clock running backwards. Closes ticket 18908.

    o Minor features (logging):
      - Add a set of macros to check nonfatal assertions, for internal
        use. Migrating more of our checks to these should help us avoid
        needless crash bugs. Closes ticket 18613.
      - Provide a more useful warning message when configured with an
        invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
      - When dumping unparseable router descriptors, optionally store them
        in separate files, named by digest, up to a configurable size
        limit. You can change the size limit by setting the
        MaxUnparseableDescSizeToLog option, and disable this feature by
        setting that option to 0. Closes ticket 18322.

    o Minor features (performance):
      - Change the "optimistic data" extension from "off by default" to
        "on by default". The default was ordinarily overridden by a
        consensus option, but when clients were bootstrapping for the
        first time, they would not have a consensus to get the option
        from. Changing this default saves a round-trip during startup.
        Closes ticket 18815.

    o Minor features (relay, usability):
      - When the directory authorities refuse a bad relay's descriptor,
        encourage the relay operator to contact us. Many relay operators
        won't notice this line in their logs, but it's a win if even a few
        learn why we don't like what their relay was doing. Resolves
        ticket 18760.

    o Minor features (security, TLS):
      - Servers no longer support clients that lack AES ciphersuites.
        (3DES is no longer considered an acceptable cipher.) We believe
        that no such Tor clients currently exist, since Tor has required
        OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.

    o Minor features (testing):
      - Disable memory protections on OpenBSD when performing our unit
        tests for memwipe(). The test deliberately invokes undefined
        behavior, and the OpenBSD protections interfere with this. Patch
        from "rubiate". Closes ticket 20066.
      - Move the test-network.sh script to chutney, and modify tor's test-
        network.sh to call the (newer) chutney version when available.
        Resolves ticket 19116. Patch by teor.
      - Use the lcov convention for marking lines as unreachable, so that
        we don't count them when we're generating test coverage data.
        Update our coverage tools to understand this convention. Closes
        ticket 16792.
      - Our link-handshake unit tests now check that when invalid
        handshakes fail, they fail with the error messages we expected.
      - Our unit testing code that captures log messages no longer
        prevents them from being written out if the user asked for them
        (by passing --debug or --info or --notice or --warn to the "test"
        binary). This change prevents us from missing unexpected log
        messages simply because we were looking for others. Related to
        ticket 19999.
      - The unit tests now log all warning messages with the "BUG" flag.
        Previously, they only logged errors by default. This change will
        help us make our testing code more correct, and make sure that we
        only hit this code when we mean to. In the meantime, however,
        there will be more warnings in the unit test logs than before.
        This is preparatory work for ticket 19999.
      - The unit tests now treat any failure of a "tor_assert_nonfatal()"
        assertion as a test failure.
      - We've done significant work to make the unit tests run faster.

    o Minor features (testing, ipv6):
      - Add the hs-ipv6 chutney target to make test-network-all's IPv6
        tests. Remove bridges+hs, as it's somewhat redundant. This
        requires a recent chutney version that supports IPv6 clients,
        relays, and authorities. Closes ticket 20069; patch by teor.
      - Add the single-onion and single-onion-ipv6 chutney targets to
        "make test-network-all". This requires a recent chutney version
        with the single onion network flavors (git c72a652 or later).
        Closes ticket 20072; patch by teor.

    o Minor features (Tor2web):
      - Make Tor2web clients respect ReachableAddresses. This feature was
        inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
        0.2.8.7. Implements feature 20034. Patch by teor.

    o Minor features (unix domain sockets):
      - When configuring a unix domain socket for a SocksPort,
        ControlPort, or Hidden service, you can now wrap the address in
        quotes, using C-style escapes inside the quotes. This allows unix
        domain socket paths to contain spaces. Resolves ticket 18753.

    o Minor features (user interface):
      - Tor now supports the ability to declare options deprecated, so
        that we can recommend that people stop using them. Previously, this
        was done in an ad-hoc way. There is a new --list-deprecated-options
        command-line option to list all of the deprecated options. Closes
        ticket 19820.

    o Minor features (virtual addresses):
      - Increase the maximum number of bits for the IPv6 virtual network
        prefix from 16 to 104. In this way, the condition for address
        allocation is less restrictive. Closes ticket 20151; feature
        on 0.2.4.7-alpha.

    o Minor bug fixes (circuits):
      - Use the CircuitBuildTimeout option whenever
        LearnCircuitBuildTimeout is disabled. Previously, we would respect
        the option when a user disabled it, but not when it was disabled
        because some other option was set. Fixes bug 20073; bugfix on
        0.2.4.12-alpha. Patch by teor.

    o Minor bugfixes (build):
      - The current Git revision when building from a local repository is
        now detected correctly when using git worktrees. Fixes bug 20492;
        bugfix on 0.2.3.9-alpha.

    o Minor bugfixes (relay address discovery):
      - Stop reordering IP addresses returned by the OS. This makes it
        more likely that Tor will guess the same relay IP address every
        time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
        Reported by René Mayrhofer, patch by "cypherpunks".

    o Minor bugfixes (memory allocation):
      - Change how we allocate memory for large chunks on buffers, to
        avoid a (currently impossible) integer overflow, and to waste less
        space when allocating unusually large chunks. Fixes bug 20081;
        bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.

    o Minor bugfixes (bootstrap):
      - Remember the directory server we fetched the consensus or previous
        certificates from, and use it to fetch future authority
        certificates. This change improves bootstrapping performance.
        Fixes bug 18963; bugfix on 0.2.8.1-alpha.

    o Minor bugfixes (circuits):
      - Make sure extend_info_from_router() is only called on servers.
        Fixes bug 19639; bugfix on 0.2.8.1-alpha.

    o Minor bugfixes (client, fascistfirewall):
      - Avoid spurious warnings when ReachableAddresses or FascistFirewall
        is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.

    o Minor bugfixes (client, unix domain sockets):
      - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
        the client address is meaningless. Fixes bug 20261; bugfix
        on 0.2.6.3-alpha.

    o Minor bugfixes (code style):
      - Fix an integer signedness conversion issue in the case conversion
        tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.

    o Minor bugfixes (compilation):
      - Build correctly on versions of libevent2 without support for
        evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
        on 0.2.5.4-alpha.
      - When building with Clang, use a full set of GCC warnings.
        (Previously, we included only a subset, because of the way we
        detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
      - Detect Libevent2 functions correctly on systems that provide
        libevent2, but where libevent1 is linked with -levent. Fixes bug
        19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
      - Run correctly when built on Windows build environments that
        require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.

    o Minor bugfixes (configuration):
      - When parsing quoted configuration values from the torrc file,
        handle Windows line endings correctly. Fixes bug 19167; bugfix on
        0.2.0.16-alpha. Patch from "Pingl".

    o Minor bugfixes (directory authority):
      - Authorities now sort the "package" lines in their votes, for ease
        of debugging. (They are already sorted in consensus documents.)
        Fixes bug 18840; bugfix on 0.2.6.3-alpha.
      - Die with a more useful error when the operator forgets to place
        the authority_signing_key file into the keys directory. This
        avoids an uninformative assert & traceback about having an invalid
        key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
      - When allowing private addresses, mark Exits that only exit to
        private locations as such. Fixes bug 20064; bugfix
        on 0.2.2.9-alpha.
      - When parsing a detached signature, make sure we use the length of
        the digest algorithm instead of a hardcoded DIGEST256_LEN in
        order to avoid comparing bytes out-of-bounds with a smaller digest
        length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.

    o Minor bugfixes (getpass):
      - Defensively fix a non-triggerable heap corruption at do_getpass()
        to protect ourselves from mistakes in the future. Fixes bug
        19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
        by nherring.

    o Minor bugfixes (guard selection):
      - Don't mark guards as unreachable if connection_connect() fails.
        That function fails for local reasons, so it shouldn't reveal
        anything about the status of the guard. Fixes bug 14334; bugfix
        on 0.2.3.10-alpha.
      - Use a single entry guard even if the NumEntryGuards consensus
        parameter is not provided. Fixes bug 17688; bugfix
        on 0.2.5.6-alpha.

    o Minor bugfixes (hidden services):
      - Increase the minimum number of internal circuits we preemptively
        build from 2 to 3, so a circuit is available when a client
        connects to another onion service. Fixes bug 13239; bugfix
        on 0.1.0.1-rc.
      - Allow hidden services to run on IPv6 addresses even when the
        IPv6Exit option is not set. Fixes bug 18357; bugfix
        on 0.2.4.7-alpha.
      - Stop logging intro point details to the client log on certain
        error conditions. Fixed as part of bug 20012; bugfix on
        0.2.4.8-alpha. Patch by teor.
      - When deleting an ephemeral hidden service, close its intro points
        even if they are not completely open. Fixes bug 18604; bugfix
        on 0.2.7.1-alpha.
      - When configuring hidden services, check every hidden service
        directory's permissions. Previously, we only checked the last
        hidden service. Fixes bug 20529; bugfix on 0.2.6.2-alpha.

    o Minor bugfixes (IPv6, testing):
      - Check for IPv6 correctly on Linux when running test networks.
        Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.

    o Minor bugfixes (Linux seccomp2 sandbox):
      - Add permission to run the sched_yield() and sigaltstack() system
        calls, in order to support versions of Tor compiled with asan or
        ubsan code that use these calls. Now "sandbox 1" and
        "--enable-expensive-hardening" should be compatible on more
        systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.

    o Minor bugfixes (logging):
      - Downgrade a harmless log message about the
        pending_entry_connections list from "warn" to "info". Mitigates
        bug 19926.
      - Log a more accurate message when we fail to dump a microdescriptor.
        Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
      - When logging a directory ownership mismatch, log the owning
        username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
      - When we are unable to remove the bw_accounting file, do not warn
        if the reason we couldn't remove it was that it didn't exist.
        Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from pastly.

    o Minor bugfixes (memory leak):
      - Fix a series of slow memory leaks related to parsing torrc files
        and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
      - Avoid a small memory leak when informing worker threads about
        rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
      - Fix a small memory leak when receiving AF_UNIX connections on a
        SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
      - When moving a signed descriptor object from a source to an
        existing destination, free the allocated memory inside that
        destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
      - Fix a memory leak and use-after-free error when removing entries
        from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
        0.2.5.5-alpha. Patch from "cypherpunks".
      - Fix a small, uncommon memory leak that could occur when reading a
        truncated ed25519 key file. Fixes bug 18956; bugfix
        on 0.2.6.1-alpha.

    o Minor bugfixes (option parsing):
      - Count unix sockets when counting client listeners (SOCKS, Trans,
        NATD, and DNS). This has no user-visible behavior changes: these
        options are set once, and never read. Required for correct
        behavior in ticket 17178. Fixes bug 19677; bugfix on
        0.2.6.3-alpha. Patch by teor.

    o Minor bugfixes (options):
      - Check the consistency of UseEntryGuards and EntryNodes more
        reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
        by teor.
      - Stop changing the configured value of UseEntryGuards on
        authorities and Tor2web clients. Fixes bug 20074; bugfix on
        commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
        Patch by teor.

    o Minor bugfixes (relay):
      - Ensure relays don't make multiple connections during bootstrap.
        Fixes bug 20591; bugfix on 0.2.8.1-alpha.
      - Do not try to parallelize workers more than 16x without the user
        explicitly configuring us to do so, even if we do detect more than
        16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.

    o Minor bugfixes (testing):
      - The test-stem and test-network makefile targets now depend only on
        the tor binary that they are testing. Previously, they depended on
        "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
        patch from "cypherpunks".
      - Allow clients to retry HSDirs much faster in test networks. Fixes
        bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
      - Avoid a unit test failure on systems with over 16 detectable CPU
        cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
      - Let backtrace tests work correctly under AddressSanitizer:
        disable ASAN's detection of segmentation faults while running
        test_bt.sh, so that we can make sure that our own backtrace
        generation code works. Fixes bug 18934; bugfix
        on 0.2.5.2-alpha. Patch from "cypherpunks".
      - Fix the test-network-all target on out-of-tree builds by using the
        correct path to the test driver script. Fixes bug 19421; bugfix
        on 0.2.7.3-rc.
      - Stop spurious failures in the local interface address discovery
        unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
        Neel Chauhan.
      - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
        removed the ECDH ciphers which caused the tests to fail on
        platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
      - The tor_tls_server_info_callback unit test no longer crashes when
        debug-level logging is turned on. Fixes bug 20041; bugfix
        on 0.2.8.1-alpha.

    o Minor bugfixes (time):
      - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
        bugfix on all released tor versions.
      - When computing the difference between two times in milliseconds,
        we now round to the nearest millisecond correctly. Previously, we
        could sometimes round in the wrong direction. Fixes bug 19428;
        bugfix on 0.2.2.2-alpha.

    o Minor bugfixes (Tor2web):
      - Prevent Tor2web clients from running hidden services: these services
        are not anonymous due to the one-hop client paths. Fixes bug
        19678. Patch by teor.

    o Minor bugfixes (user interface):
      - Display a more accurate number of suppressed messages in the log
        rate-limiter. Previously, there was a potential integer overflow
        in the counter. Now, if the number of messages hits a maximum, the
        rate-limiter doesn't count any further. Fixes bug 19435; bugfix
        on 0.2.4.11-alpha.
      - Fix a typo in the passphrase prompt for the ed25519 identity key.
        Fixes bug 19503; bugfix on 0.2.7.2-alpha.

    o Code simplification and refactoring:
      - Remove redundant declarations of the MIN macro. Closes
        ticket 18889.
      - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
        Closes ticket 18462; patch from "icanhasaccount".
      - Split the 600-line directory_handle_command_get function into
        separate functions for different URL types. Closes ticket 16698.

    o Documentation:
      - Add module-level internal documentation for 36 C files that
        previously didn't have a high-level overview. Closes ticket 20385.
      - Correct the IPv6 syntax in our documentation for the
        VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
      - Correct the minimum bandwidth value in torrc.sample, and queue a
        corresponding change for torrc.minimal. Closes ticket 20085.
      - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
        ticket 19153. Patch from "U+039b".
      - Module-level documentation for several more modules. Closes
        tickets 19287 and 19290.
      - Document the --passphrase-fd option in the tor manpage. Fixes bug
        19504; bugfix on 0.2.7.3-rc.
      - Document the default PathsNeededToBuildCircuits value that's used
        by clients when the directory authorities don't set
        min_paths_for_circs_pct. Fixes bug 20117; bugfix on 0.2.4.10-alpha.
        Patch by teor, reported by Jesse V.
      - Fix manual for the User option: it takes a username, not a UID.
        Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
        a manpage!).
      - Fix the description of the --passphrase-fd option in the
        tor-gencert manpage. The option is used to pass the number of a
        file descriptor to read the passphrase from, not to read the file
        descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.

    o Removed code:
      - We no longer include the (dead, deprecated) bufferevent code in
        Tor. Closes ticket 19450. Based on a patch from "U+039b".

    o Removed features:
      - Remove support for "GET /tor/bytes.txt" DirPort request, and
        "GETINFO dir-usage" controller request, which were only available
        via a compile-time option in Tor anyway. Feature was added in
        0.2.2.1-alpha. Resolves ticket 19035.
      - There is no longer a compile-time option to disable support for
        TransPort. (If you don't want TransPort, just don't use it.) Patch
        from "U+039b". Closes ticket 19449.

    o Testing:
      - Run more workqueue tests as part of "make check". These had
        previously been implemented, but you needed to know special
        command-line options to enable them.
      - We now have unit tests for our code to reject zlib "compression
        bombs". (Fortunately, the code works fine.)

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Tue Jan 24 08:59:07 UTC 2017

   Modified Files:
   	pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Updated tor to 0.2.9.9.

   Changes in version 0.2.9.9 - 2017-01-23
    Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
    cause relays and clients to crash, even if they were not built with
    the --enable-expensive-hardening option. This bug affects all 0.2.9.x
    versions, and also affects 0.3.0.1-alpha: all relays running an affected
    version should upgrade.

    This release also resolves a client-side onion service reachability
    bug, and resolves a pair of small portability issues.

    o Major bugfixes (security):
      - Downgrade the "-ftrapv" option from "always on" to "only on when
        --enable-expensive-hardening is provided." This hardening option,
        like others, can turn survivable bugs into crashes -- and having
        it on by default made a (relatively harmless) integer overflow bug
        into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
        bugfix on 0.2.9.1-alpha.

    o Major bugfixes (client, onion service):
      - Fix a client-side onion service reachability bug, where multiple
        socks requests to an onion service (or a single slow request)
        could cause us to mistakenly mark some of the service's
        introduction points as failed, and we cache that failure so
        eventually we run out and can't reach the service. Also resolves a
        mysterious "Remote server sent bogus reason code 65021" log
        warning. The bug was introduced in ticket 17218, where we tried to
        remember the circuit end reason as a uint16_t, which mangled
        negative values. Partially fixes bug 21056 and fixes bug 20307;
        bugfix on 0.2.8.1-alpha.

    o Minor features (geoip):
      - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
        Country database.

    o Minor bugfixes (portability):
      - Avoid crashing when Tor is built using headers that contain
        CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
        without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
        on 0.2.9.1-alpha.
      - Fix Libevent detection on platforms without Libevent 1 headers
        installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.

Revision 1.78: download - view: text, markup, annotated - select for diffs
Tue Jan 24 08:59:07 2017 UTC (7 years, 10 months ago) by wiz
Branches: MAIN
Diff to: previous 1.77: preferred, colored
Changes since revision 1.77: +5 -5 lines
Updated tor to 0.2.9.9.

Changes in version 0.2.9.9 - 2017-01-23
  Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
  cause relays and clients to crash, even if they were not built with
  the --enable-expensive-hardening option. This bug affects all 0.2.9.x
  versions, and also affects 0.3.0.1-alpha: all relays running an affected
  version should upgrade.

  This release also resolves a client-side onion service reachability
  bug, and resolves a pair of small portability issues.

  o Major bugfixes (security):
    - Downgrade the "-ftrapv" option from "always on" to "only on when
      --enable-expensive-hardening is provided." This hardening option,
      like others, can turn survivable bugs into crashes -- and having
      it on by default made a (relatively harmless) integer overflow bug
      into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
      bugfix on 0.2.9.1-alpha.

  o Major bugfixes (client, onion service):
    - Fix a client-side onion service reachability bug, where multiple
      socks requests to an onion service (or a single slow request)
      could cause us to mistakenly mark some of the service's
      introduction points as failed, and we cache that failure so
      eventually we run out and can't reach the service. Also resolves a
      mysterious "Remote server sent bogus reason code 65021" log
      warning. The bug was introduced in ticket 17218, where we tried to
      remember the circuit end reason as a uint16_t, which mangled
      negative values. Partially fixes bug 21056 and fixes bug 20307;
      bugfix on 0.2.8.1-alpha.

  o Minor features (geoip):
    - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (portability):
    - Avoid crashing when Tor is built using headers that contain
      CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
      without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
      on 0.2.9.1-alpha.
    - Fix Libevent detection on platforms without Libevent 1 headers
      installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.

Revision 1.77: download - view: text, markup, annotated - select for diffs
Sun Jan 8 12:50:41 2017 UTC (7 years, 10 months ago) by maya
Branches: MAIN
Diff to: previous 1.76: preferred, colored
Changes since revision 1.76: +5 -5 lines
tor: update to 0.2.9.8
Updated provided by reezer (maintainer) in PR pkg/51745

Changes in version 0.2.9.8 - 2016-12-19
  Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.

  The Tor 0.2.9 series makes mandatory a number of security features
  that were formerly optional. It includes support for a new shared-
  randomness protocol that will form the basis for next generation
  hidden services, includes a single-hop hidden service mode for
  optimizing .onion services that don't actually want to be hidden,
  tries harder not to overload the directory authorities with excessive
  downloads, and supports a better protocol versioning scheme for
  improved compatibility with other implementations of the Tor protocol.

  And of course, there are numerous other bugfixes and improvements.

  This release also includes a fix for a medium-severity issue (bug
  21018 below) where Tor clients could crash when attempting to visit a
  hostile hidden service. Clients are recommended to upgrade as packages
  become available for their systems.

  Below are listed the changes since Tor 0.2.8.11.  For a list of
  changes since 0.2.9.7-rc, see the ChangeLog file.

  o New system requirements:
    - When building with OpenSSL, Tor now requires version 1.0.1 or
      later. OpenSSL 1.0.0 and earlier are no longer supported by the
      OpenSSL team, and should not be used. Closes ticket 20303.
    - Tor now requires Libevent version 2.0.10-stable or later. Older
      versions of Libevent have less efficient backends for several
      platforms, and lack the DNS code that we use for our server-side
      DNS support. This implements ticket 19554.
    - Tor now requires zlib version 1.2 or later, for security,
      efficiency, and (eventually) gzip support. (Back when we started,
      zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
      released in 2003. We recommend the latest version.)

  o Deprecated features:
    - A number of DNS-cache-related sub-options for client ports are now
      deprecated for security reasons, and may be removed in a future
      version of Tor. (We believe that client-side DNS caching is a bad
      idea for anonymity, and you should not turn it on.) The options
      are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
      UseIPv4Cache, and UseIPv6Cache.
    - A number of options are deprecated for security reasons, and may
      be removed in a future version of Tor. The options are:
      AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
      AllowSingleHopExits, ClientDNSRejectInternalAddresses,
      CloseHSClientCircuitsImmediatelyOnTimeout,
      CloseHSServiceRendCircuitsImmediatelyOnTimeout,
      ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
      UseNTorHandshake, and WarnUnsafeSocks.
    - The *ListenAddress options are now deprecated as unnecessary: the
      corresponding *Port options should be used instead. These options
      may someday be removed. The affected options are:
      ControlListenAddress, DNSListenAddress, DirListenAddress,
      NATDListenAddress, ORListenAddress, SocksListenAddress,
      and TransListenAddress.

  o Major bugfixes (parsing, security, new since 0.2.9.7-rc):
    - Fix a bug in parsing that could cause clients to read a single
      byte past the end of an allocated region. This bug could be used
      to cause hardened clients (built with --enable-expensive-hardening)
      to crash if they tried to visit a hostile hidden service. Non-
      hardened clients are only affected depending on the details of
      their platform's memory allocator. Fixes bug 21018; bugfix on
      0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
      2016-12-002 and as CVE-2016-1254.

  o Major features (build, hardening):
    - Tor now builds with -ftrapv by default on compilers that support
      it. This option detects signed integer overflow (which C forbids),
      and turns it into a hard-failure. We do not apply this option to
      code that needs to run in constant time to avoid side-channels;
      instead, we use -fwrapv in that code. Closes ticket 17983.
    - When --enable-expensive-hardening is selected, stop applying the
      clang/gcc sanitizers to code that needs to run in constant time.
      Although we are aware of no introduced side-channels, we are not
      able to prove that there are none. Related to ticket 17983.

  o Major features (circuit building, security):
    - Authorities, relays, and clients now require ntor keys in all
      descriptors, for all hops (except for rare hidden service protocol
      cases), for all circuits, and for all other roles. Part of
      ticket 19163.
    - Authorities, relays, and clients only use ntor, except for
      rare cases in the hidden service protocol. Part of ticket 19163.

  o Major features (compilation):
    - Our big list of extra GCC warnings is now enabled by default when
      building with GCC (or with anything like Clang that claims to be
      GCC-compatible). To make all warnings into fatal compilation
      errors, pass --enable-fatal-warnings to configure. Closes
      ticket 19044.
    - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
      turn on C and POSIX extensions. (Previously, we attempted to do
      this on an ad hoc basis.) Closes ticket 19139.

  o Major features (directory authorities, hidden services):
    - Directory authorities can now perform the shared randomness
      protocol specified by proposal 250. Using this protocol, directory
      authorities generate a global fresh random value every day. In the
      future, this value will be used by hidden services to select
      HSDirs. This release implements the directory authority feature;
      the hidden service side will be implemented in the future as part
      of proposal 224. Resolves ticket 16943; implements proposal 250.

  o Major features (downloading, random exponential backoff):
    - When we fail to download an object from a directory service, wait
      for an (exponentially increasing) randomized amount of time before
      retrying, rather than a fixed interval as we did before. This
      prevents a group of Tor instances from becoming too synchronized,
      or a single Tor instance from becoming too predictable, in its
      download schedule. Closes ticket 15942.

  o Major features (resource management):
    - Tor can now notice it is about to run out of sockets, and
      preemptively close connections of lower priority. (This feature is
      off by default for now, since the current prioritizing method is
      yet not mature enough. You can enable it by setting
      "DisableOOSCheck 0", but watch out: it might close some sockets
      you would rather have it keep.) Closes ticket 18640.

  o Major features (single-hop "hidden" services):
    - Add experimental HiddenServiceSingleHopMode and
      HiddenServiceNonAnonymousMode options. When both are set to 1,
      every hidden service on that Tor instance becomes a non-anonymous
      Single Onion Service. Single Onions make one-hop (direct)
      connections to their introduction and rendezvous points. One-hop
      circuits make Single Onion servers easily locatable, but clients
      remain location-anonymous. This is compatible with the existing
      hidden service implementation, and works on the current Tor
      network without any changes to older relays or clients. Implements
      proposal 260, completes ticket 17178. Patch by teor and asn.

  o Major features (subprotocol versions):
    - Tor directory authorities now vote on a set of recommended
      "subprotocol versions", and on a set of required subprotocol
      versions. Clients and relays that lack support for a _required_
      subprotocol version will not start; those that lack support for a
      _recommended_ subprotocol version will warn the user to upgrade.
      This change allows compatible implementations of the Tor protocol(s)
      to exist without pretending to be 100% bug-compatible with
      particular releases of Tor itself. Closes ticket 19958; implements
      part of proposal 264.

  o Major bugfixes (circuit building):
    - Hidden service client-to-intro-point and service-to-rendezvous-
      point circuits use the TAP key supplied by the protocol, to avoid
      epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.

  o Major bugfixes (download scheduling):
    - Avoid resetting download status for consensuses hourly, since we
      already have another, smarter retry mechanism. Fixes bug 8625;
      bugfix on 0.2.0.9-alpha.
    - If a consensus expires while we are waiting for certificates to
      download, stop waiting for certificates.
    - If we stop waiting for certificates less than a minute after we
      started downloading them, do not consider the certificate download
      failure a separate failure. Fixes bug 20533; bugfix
      on 0.2.0.9-alpha.
    - When using exponential backoff in test networks, use a lower
      exponent, so the delays do not vary as much. This helps test
      networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.

  o Major bugfixes (exit policies):
    - Avoid disclosing exit outbound bind addresses, configured port
      bind addresses, and local interface addresses in relay descriptors
      by default under ExitPolicyRejectPrivate. Instead, only reject
      these (otherwise unlisted) addresses if
      ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
      0.2.7.2-alpha. Patch by teor.

  o Major bugfixes (hidden services):
    - Allow Tor clients with appropriate controllers to work with
      FetchHidServDescriptors set to 0. Previously, this option also
      disabled descriptor cache lookup, thus breaking hidden services
      entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
    - Clients now require hidden services to include the TAP keys for
      their intro points in the hidden service descriptor. This prevents
      an inadvertent upgrade to ntor, which a malicious hidden service
      could use to distinguish clients by consensus version. Fixes bug
      20012; bugfix on 0.2.4.8-alpha. Patch by teor.

  o Major bugfixes (relay, resolver, logging):
    - For relays that don't know their own address, avoid attempting a
      local hostname resolve for each descriptor we download. This
      will cut down on the number of "Success: chose address 'x.x.x.x'"
      log lines, and also avoid confusing clock jumps if the resolver
      is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.

  o Minor features (port flags):
    - Add new flags to the *Port options to give finer control over which
      requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
      and the synthetic flag OnionTrafficOnly, which is equivalent to
      NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
      18693; patch by "teor".

  o Minor features (build, hardening):
    - Detect and work around a libclang_rt problem that would prevent
      clang from finding __mulodi4() on some 32-bit platforms, and thus
      keep -ftrapv from linking on those systems. Closes ticket 19079.
    - When building on a system without runtime support for the runtime
      hardening options, try to log a useful warning at configuration
      time, rather than an incomprehensible warning at link time. If
      expensive hardening was requested, this warning becomes an error.
      Closes ticket 18895.

  o Minor features (client, directory):
    - Since authorities now omit all routers that lack the Running and
      Valid flags, we assume that any relay listed in the consensus must
      have those flags. Closes ticket 20001; implements part of
      proposal 272.

  o Minor features (code safety):
    - In our integer-parsing functions, ensure that the maximum value we
      allow is no smaller than the minimum value. Closes ticket 19063;
      patch from "U+039b".

  o Minor features (compilation, portability):
    - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
      ticket 20241.

  o Minor features (config):
    - Warn users when descriptor and port addresses are inconsistent.
      Mitigates bug 13953; patch by teor.

  o Minor features (controller):
    - Allow controllers to configure basic client authorization on
      hidden services when they create them with the ADD_ONION controller
      command. Implements ticket 15588. Patch by "special".
    - Fire a STATUS_SERVER controller event whenever the hibernation
      status changes between "awake"/"soft"/"hard". Closes ticket 18685.
    - Implement new GETINFO queries for all downloads that use
      download_status_t to schedule retries. This allows controllers to
      examine the schedule for pending downloads. Closes ticket 19323.

  o Minor features (development tools, etags):
    - Teach the "make tags" Makefile target how to correctly find
      "MOCK_IMPL" function definitions. Patch from nherring; closes
      ticket 16869.

  o Minor features (directory authority):
    - After voting, if the authorities decide that a relay is not
      "Valid", they no longer include it in the consensus at all. Closes
      ticket 20002; implements part of proposal 272.
    - Directory authorities now only give the Guard flag to a relay if
      they are also giving it the Stable flag. This change allows us to
      simplify path selection for clients. It should have minimal effect
      in practice, since >99% of Guards already have the Stable flag.
      Implements ticket 18624.
    - Directory authorities now write their v3-status-votes file out to
      disk earlier in the consensus process, so we have a record of the
      votes even if we abort the consensus process. Resolves
      ticket 19036.

  o Minor features (fallback directory list, new since 0.2.9.7-rc):
    - Replace the 81 remaining fallbacks of the 100 originally
      introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
      fallbacks (123 new, 54 existing, 27 removed) generated in December
      2016. Resolves ticket 20170.

  o Minor features (hidden service):
    - Stop being so strict about the payload length of "rendezvous1"
      cells. We used to be locked in to the "TAP" handshake length, and
      now we can handle better handshakes like "ntor". Resolves
      ticket 18998.

  o Minor features (infrastructure, time):
    - Tor now includes an improved timer backend, so that we can
      efficiently support tens or hundreds of thousands of concurrent
      timers, as will be needed for some of our planned anti-traffic-
      analysis work. This code is based on William Ahern's "timeout.c"
      project, which implements a "tickless hierarchical timing wheel".
      Closes ticket 18365.
    - Tor now uses the operating system's monotonic timers (where
      available) for internal fine-grained timing. Previously we would
      look at the system clock, and then attempt to compensate for the
      clock running backwards. Closes ticket 18908.

  o Minor features (logging):
    - Add a set of macros to check nonfatal assertions, for internal
      use. Migrating more of our checks to these should help us avoid
      needless crash bugs. Closes ticket 18613.
    - Provide a more useful warning message when configured with an
      invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
    - When dumping unparseable router descriptors, optionally store them
      in separate files, named by digest, up to a configurable size
      limit. You can change the size limit by setting the
      MaxUnparseableDescSizeToLog option, and disable this feature by
      setting that option to 0. Closes ticket 18322.

  o Minor features (performance):
    - Change the "optimistic data" extension from "off by default" to
      "on by default". The default was ordinarily overridden by a
      consensus option, but when clients were bootstrapping for the
      first time, they would not have a consensus to get the option
      from. Changing this default saves a round-trip during startup.
      Closes ticket 18815.

  o Minor features (relay, usability):
    - When the directory authorities refuse a bad relay's descriptor,
      encourage the relay operator to contact us. Many relay operators
      won't notice this line in their logs, but it's a win if even a few
      learn why we don't like what their relay was doing. Resolves
      ticket 18760.

  o Minor features (security, TLS):
    - Servers no longer support clients that lack AES ciphersuites.
      (3DES is no longer considered an acceptable cipher.) We believe
      that no such Tor clients currently exist, since Tor has required
      OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.

  o Minor features (testing):
    - Disable memory protections on OpenBSD when performing our unit
      tests for memwipe(). The test deliberately invokes undefined
      behavior, and the OpenBSD protections interfere with this. Patch
      from "rubiate". Closes ticket 20066.
    - Move the test-network.sh script to chutney, and modify tor's test-
      network.sh to call the (newer) chutney version when available.
      Resolves ticket 19116. Patch by teor.
    - Use the lcov convention for marking lines as unreachable, so that
      we don't count them when we're generating test coverage data.
      Update our coverage tools to understand this convention. Closes
      ticket 16792.
    - Our link-handshake unit tests now check that when invalid
      handshakes fail, they fail with the error messages we expected.
    - Our unit testing code that captures log messages no longer
      prevents them from being written out if the user asked for them
      (by passing --debug or --info or --notice or --warn to the "test"
      binary). This change prevents us from missing unexpected log
      messages simply because we were looking for others. Related to
      ticket 19999.
    - The unit tests now log all warning messages with the "BUG" flag.
      Previously, they only logged errors by default. This change will
      help us make our testing code more correct, and make sure that we
      only hit this code when we mean to. In the meantime, however,
      there will be more warnings in the unit test logs than before.
      This is preparatory work for ticket 19999.
    - The unit tests now treat any failure of a "tor_assert_nonfatal()"
      assertion as a test failure.
    - We've done significant work to make the unit tests run faster.

  o Minor features (testing, ipv6):
    - Add the hs-ipv6 chutney target to make test-network-all's IPv6
      tests. Remove bridges+hs, as it's somewhat redundant. This
      requires a recent chutney version that supports IPv6 clients,
      relays, and authorities. Closes ticket 20069; patch by teor.
    - Add the single-onion and single-onion-ipv6 chutney targets to
      "make test-network-all". This requires a recent chutney version
      with the single onion network flavors (git c72a652 or later).
      Closes ticket 20072; patch by teor.

  o Minor features (Tor2web):
    - Make Tor2web clients respect ReachableAddresses. This feature was
      inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
      0.2.8.7. Implements feature 20034. Patch by teor.

  o Minor features (unix domain sockets):
    - When configuring a unix domain socket for a SocksPort,
      ControlPort, or Hidden service, you can now wrap the address in
      quotes, using C-style escapes inside the quotes. This allows unix
      domain socket paths to contain spaces. Resolves ticket 18753.

  o Minor features (user interface):
    - Tor now supports the ability to declare options deprecated, so
      that we can recommend that people stop using them. Previously, this
      was done in an ad-hoc way. There is a new --list-deprecated-options
      command-line option to list all of the deprecated options. Closes
      ticket 19820.

  o Minor features (virtual addresses):
    - Increase the maximum number of bits for the IPv6 virtual network
      prefix from 16 to 104. In this way, the condition for address
      allocation is less restrictive. Closes ticket 20151; feature
      on 0.2.4.7-alpha.

  o Minor bug fixes (circuits):
    - Use the CircuitBuildTimeout option whenever
      LearnCircuitBuildTimeout is disabled. Previously, we would respect
      the option when a user disabled it, but not when it was disabled
      because some other option was set. Fixes bug 20073; bugfix on
      0.2.4.12-alpha. Patch by teor.

  o Minor bugfixes (build):
    - The current Git revision when building from a local repository is
      now detected correctly when using git worktrees. Fixes bug 20492;
      bugfix on 0.2.3.9-alpha.

  o Minor bugfixes (relay address discovery):
    - Stop reordering IP addresses returned by the OS. This makes it
      more likely that Tor will guess the same relay IP address every
      time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
      Reported by René Mayrhofer, patch by "cypherpunks".

  o Minor bugfixes (memory allocation):
    - Change how we allocate memory for large chunks on buffers, to
      avoid a (currently impossible) integer overflow, and to waste less
      space when allocating unusually large chunks. Fixes bug 20081;
      bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.

  o Minor bugfixes (bootstrap):
    - Remember the directory server we fetched the consensus or previous
      certificates from, and use it to fetch future authority
      certificates. This change improves bootstrapping performance.
      Fixes bug 18963; bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (circuits):
    - Make sure extend_info_from_router() is only called on servers.
      Fixes bug 19639; bugfix on 0.2.8.1-alpha.

  o Minor bugfixes (client, fascistfirewall):
    - Avoid spurious warnings when ReachableAddresses or FascistFirewall
      is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.

  o Minor bugfixes (client, unix domain sockets):
    - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
      the client address is meaningless. Fixes bug 20261; bugfix
      on 0.2.6.3-alpha.

  o Minor bugfixes (code style):
    - Fix an integer signedness conversion issue in the case conversion
      tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.

  o Minor bugfixes (compilation):
    - Build correctly on versions of libevent2 without support for
      evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
      on 0.2.5.4-alpha.
    - When building with Clang, use a full set of GCC warnings.
      (Previously, we included only a subset, because of the way we
      detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
    - Detect Libevent2 functions correctly on systems that provide
      libevent2, but where libevent1 is linked with -levent. Fixes bug
      19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
    - Run correctly when built on Windows build environments that
      require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.

  o Minor bugfixes (configuration):
    - When parsing quoted configuration values from the torrc file,
      handle Windows line endings correctly. Fixes bug 19167; bugfix on
      0.2.0.16-alpha. Patch from "Pingl".

  o Minor bugfixes (directory authority):
    - Authorities now sort the "package" lines in their votes, for ease
      of debugging. (They are already sorted in consensus documents.)
      Fixes bug 18840; bugfix on 0.2.6.3-alpha.
    - Die with a more useful error when the operator forgets to place
      the authority_signing_key file into the keys directory. This
      avoids an uninformative assert & traceback about having an invalid
      key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
    - When allowing private addresses, mark Exits that only exit to
      private locations as such. Fixes bug 20064; bugfix
      on 0.2.2.9-alpha.
    - When parsing a detached signature, make sure we use the length of
      the digest algorithm instead of a hardcoded DIGEST256_LEN in
      order to avoid comparing bytes out-of-bounds with a smaller digest
      length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.

  o Minor bugfixes (getpass):
    - Defensively fix a non-triggerable heap corruption at do_getpass()
      to protect ourselves from mistakes in the future. Fixes bug
      19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
      by nherring.

  o Minor bugfixes (guard selection):
    - Don't mark guards as unreachable if connection_connect() fails.
      That function fails for local reasons, so it shouldn't reveal
      anything about the status of the guard. Fixes bug 14334; bugfix
      on 0.2.3.10-alpha.
    - Use a single entry guard even if the NumEntryGuards consensus
      parameter is not provided. Fixes bug 17688; bugfix
      on 0.2.5.6-alpha.

  o Minor bugfixes (hidden services):
    - Increase the minimum number of internal circuits we preemptively
      build from 2 to 3, so a circuit is available when a client
      connects to another onion service. Fixes bug 13239; bugfix
      on 0.1.0.1-rc.
    - Allow hidden services to run on IPv6 addresses even when the
      IPv6Exit option is not set. Fixes bug 18357; bugfix
      on 0.2.4.7-alpha.
    - Stop logging intro point details to the client log on certain
      error conditions. Fixed as part of bug 20012; bugfix on
      0.2.4.8-alpha. Patch by teor.
    - When deleting an ephemeral hidden service, close its intro points
      even if they are not completely open. Fixes bug 18604; bugfix
      on 0.2.7.1-alpha.
    - When configuring hidden services, check every hidden service
      directory's permissions. Previously, we only checked the last
      hidden service. Fixes bug 20529; bugfix on 0.2.6.2-alpha.

  o Minor bugfixes (IPv6, testing):
    - Check for IPv6 correctly on Linux when running test networks.
      Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.

  o Minor bugfixes (Linux seccomp2 sandbox):
    - Add permission to run the sched_yield() and sigaltstack() system
      calls, in order to support versions of Tor compiled with asan or
      ubsan code that use these calls. Now "sandbox 1" and
      "--enable-expensive-hardening" should be compatible on more
      systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.

  o Minor bugfixes (logging):
    - Downgrade a harmless log message about the
      pending_entry_connections list from "warn" to "info". Mitigates
      bug 19926.
    - Log a more accurate message when we fail to dump a microdescriptor.
      Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
    - When logging a directory ownership mismatch, log the owning
      username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
    - When we are unable to remove the bw_accounting file, do not warn
      if the reason we couldn't remove it was that it didn't exist.
      Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from pastly.

  o Minor bugfixes (memory leak):
    - Fix a series of slow memory leaks related to parsing torrc files
      and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
    - Avoid a small memory leak when informing worker threads about
      rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
    - Fix a small memory leak when receiving AF_UNIX connections on a
      SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
    - When moving a signed descriptor object from a source to an
      existing destination, free the allocated memory inside that
      destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
    - Fix a memory leak and use-after-free error when removing entries
      from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
      0.2.5.5-alpha. Patch from "cypherpunks".
    - Fix a small, uncommon memory leak that could occur when reading a
      truncated ed25519 key file. Fixes bug 18956; bugfix
      on 0.2.6.1-alpha.

  o Minor bugfixes (option parsing):
    - Count unix sockets when counting client listeners (SOCKS, Trans,
      NATD, and DNS). This has no user-visible behavior changes: these
      options are set once, and never read. Required for correct
      behavior in ticket 17178. Fixes bug 19677; bugfix on
      0.2.6.3-alpha. Patch by teor.

  o Minor bugfixes (options):
    - Check the consistency of UseEntryGuards and EntryNodes more
      reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
      by teor.
    - Stop changing the configured value of UseEntryGuards on
      authorities and Tor2web clients. Fixes bug 20074; bugfix on
      commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
      Patch by teor.

  o Minor bugfixes (relay):
    - Ensure relays don't make multiple connections during bootstrap.
      Fixes bug 20591; bugfix on 0.2.8.1-alpha.
    - Do not try to parallelize workers more than 16x without the user
      explicitly configuring us to do so, even if we do detect more than
      16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.

  o Minor bugfixes (testing):
    - The test-stem and test-network makefile targets now depend only on
      the tor binary that they are testing. Previously, they depended on
      "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
      patch from "cypherpunks".
    - Allow clients to retry HSDirs much faster in test networks. Fixes
      bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
    - Avoid a unit test failure on systems with over 16 detectable CPU
      cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
    - Let backtrace tests work correctly under AddressSanitizer:
      disable ASAN's detection of segmentation faults while running
      test_bt.sh, so that we can make sure that our own backtrace
      generation code works. Fixes bug 18934; bugfix
      on 0.2.5.2-alpha. Patch from "cypherpunks".
    - Fix the test-network-all target on out-of-tree builds by using the
      correct path to the test driver script. Fixes bug 19421; bugfix
      on 0.2.7.3-rc.
    - Stop spurious failures in the local interface address discovery
      unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
      Neel Chauhan.
    - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
      removed the ECDH ciphers which caused the tests to fail on
      platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
    - The tor_tls_server_info_callback unit test no longer crashes when
      debug-level logging is turned on. Fixes bug 20041; bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (time):
    - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
      bugfix on all released tor versions.
    - When computing the difference between two times in milliseconds,
      we now round to the nearest millisecond correctly. Previously, we
      could sometimes round in the wrong direction. Fixes bug 19428;
      bugfix on 0.2.2.2-alpha.

  o Minor bugfixes (Tor2web):
    - Prevent Tor2web clients from running hidden services: these services
      are not anonymous due to the one-hop client paths. Fixes bug
      19678. Patch by teor.

  o Minor bugfixes (user interface):
    - Display a more accurate number of suppressed messages in the log
      rate-limiter. Previously, there was a potential integer overflow
      in the counter. Now, if the number of messages hits a maximum, the
      rate-limiter doesn't count any further. Fixes bug 19435; bugfix
      on 0.2.4.11-alpha.
    - Fix a typo in the passphrase prompt for the ed25519 identity key.
      Fixes bug 19503; bugfix on 0.2.7.2-alpha.

  o Code simplification and refactoring:
    - Remove redundant declarations of the MIN macro. Closes
      ticket 18889.
    - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
      Closes ticket 18462; patch from "icanhasaccount".
    - Split the 600-line directory_handle_command_get function into
      separate functions for different URL types. Closes ticket 16698.

  o Documentation:
    - Add module-level internal documentation for 36 C files that
      previously didn't have a high-level overview. Closes ticket 20385.
    - Correct the IPv6 syntax in our documentation for the
      VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
    - Correct the minimum bandwidth value in torrc.sample, and queue a
      corresponding change for torrc.minimal. Closes ticket 20085.
    - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
      ticket 19153. Patch from "U+039b".
    - Module-level documentation for several more modules. Closes
      tickets 19287 and 19290.
    - Document the --passphrase-fd option in the tor manpage. Fixes bug
      19504; bugfix on 0.2.7.3-rc.
    - Document the default PathsNeededToBuildCircuits value that's used
      by clients when the directory authorities don't set
      min_paths_for_circs_pct. Fixes bug 20117; bugfix on 0.2.4.10-alpha.
      Patch by teor, reported by Jesse V.
    - Fix manual for the User option: it takes a username, not a UID.
      Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
      a manpage!).
    - Fix the description of the --passphrase-fd option in the
      tor-gencert manpage. The option is used to pass the number of a
      file descriptor to read the passphrase from, not to read the file
      descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.

  o Removed code:
    - We no longer include the (dead, deprecated) bufferevent code in
      Tor. Closes ticket 19450. Based on a patch from "U+039b".

  o Removed features:
    - Remove support for "GET /tor/bytes.txt" DirPort request, and
      "GETINFO dir-usage" controller request, which were only available
      via a compile-time option in Tor anyway. Feature was added in
      0.2.2.1-alpha. Resolves ticket 19035.
    - There is no longer a compile-time option to disable support for
      TransPort. (If you don't want TransPort, just don't use it.) Patch
      from "U+039b". Closes ticket 19449.

  o Testing:
    - Run more workqueue tests as part of "make check". These had
      previously been implemented, but you needed to know special
      command-line options to enable them.
    - We now have unit tests for our code to reject zlib "compression
      bombs". (Fortunately, the code works fine.)

Revision 1.76: download - view: text, markup, annotated - select for diffs
Mon Dec 12 13:33:29 2016 UTC (7 years, 11 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2016Q4-base
Branch point for: pkgsrc-2016Q4
Diff to: previous 1.75: preferred, colored
Changes since revision 1.75: +5 -5 lines
Updated tor to 0.2.8.11.

Changes in version 0.2.8.11 - 2016-12-08
  Tor 0.2.8.11 backports fixes for additional portability issues that
  could prevent Tor from building correctly on OSX Sierra, or with
  OpenSSL 1.1. Affected users should upgrade; others can safely stay
  with 0.2.8.10.

  o Minor bugfixes (portability):
    - Avoid compilation errors when building on OSX Sierra. Sierra began
      to support the getentropy() and clock_gettime() APIs, but created
      a few problems in doing so. Tor 0.2.9 has a more thorough set of
      workarounds; in 0.2.8, we are just using the /dev/urandom and mach
      monotonic time interfaces. Fixes bug 20865. Bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
    - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
      architectures. Closes ticket 20588.

Revision 1.75: download - view: text, markup, annotated - select for diffs
Mon Dec 5 17:09:45 2016 UTC (7 years, 11 months ago) by leot
Branches: MAIN
Diff to: previous 1.74: preferred, colored
Changes since revision 1.74: +5 -5 lines
Update net/tor to tor-0.2.8.10

From Christian Sturm via PR pkg/51693

pkgsrc changes:
 - Change MAINTAINER to a more suitable email address

Changes:
Changes in version 0.2.8.10 - 2016-12-02
  Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
  unusable after they left standby mode. It also backports fixes for
  a few portability issues and a small but problematic memory leak.

  o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
    - When Tor leaves standby because of a new application request, open
      circuits as needed to serve that request. Previously, we would
      potentially wait a very long time. Fixes part of bug 19969; bugfix
      on 0.2.8.1-alpha.

  o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
    - Clients now respond to new application stream requests immediately
      when they arrive, rather than waiting up to one second before
      starting to handle them. Fixes part of bug 19969; bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (portability, backport from 0.2.9.6-rc):
    - Work around a bug in the OSX 10.12 SDK that would prevent us from
      successfully targeting earlier versions of OSX. Resolves
      ticket 20235.

  o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
    - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
      20551; bugfix on 0.2.1.1-alpha.

  o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
    - Work around a memory leak in OpenSSL 1.1 when encoding public
      keys. Fixes bug 20553; bugfix on 0.0.2pre8.

  o Minor features (geoip):
    - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
      Country database.

Revision 1.72.2.1: download - view: text, markup, annotated - select for diffs
Thu Nov 3 19:02:17 2016 UTC (8 years, 1 month ago) by bsiegert
Branches: pkgsrc-2016Q3
Diff to: previous 1.72: preferred, colored; next MAIN 1.73: preferred, colored
Changes since revision 1.72: +5 -5 lines
Pullup ticket #5145 - requested by wiz
net/tor: security fix

Revisions pulled up:
- net/tor/Makefile                                              1.112-1.113
- net/tor/distinfo                                              1.73-1.74

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Fri Sep 30 10:53:01 UTC 2016

   Modified Files:
   	pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Updated tor to 0.2.8.8.

   Changes in version 0.2.8.8 - 2016-09-23
     Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
     0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
     who select public relays as their bridges.

     o Major bugfixes (crash):
       - Fix a complicated crash bug that could affect Tor clients
         configured to use bridges when replacing a networkstatus consensus
         in which one of their bridges was mentioned. OpenBSD users saw
         more crashes here, but all platforms were potentially affected.
         Fixes bug 20103; bugfix on 0.2.8.2-alpha.

     o Major bugfixes (relay, OOM handler):
       - Fix a timing-dependent assertion failure that could occur when we
         tried to flush from a circuit after having freed its cells because
         of an out-of-memory condition. Fixes bug 20203; bugfix on
         0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
         this one.

     o Minor feature (fallback directories):
       - Remove broken fallbacks from the hard-coded fallback directory
         list. Closes ticket 20190; patch by teor.

     o Minor features (geoip):
       - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
         Country database.

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Wed Oct 19 10:58:14 UTC 2016

   Modified Files:
   	pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Updated tor to 0.2.8.9.

   Changes in version 0.2.8.9 - 2016-10-17
     Tor 0.2.8.9 backports a fix for a security hole in previous versions
     of Tor that would allow a remote attacker to crash a Tor client,
     hidden service, relay, or authority. All Tor users should upgrade to
     this version, or to 0.2.9.4-alpha. Patches will be released for older
     versions of Tor.

     o Major features (security fixes, also in 0.2.9.4-alpha):
       - Prevent a class of security bugs caused by treating the contents
         of a buffer chunk as if they were a NUL-terminated string. At
         least one such bug seems to be present in all currently used
         versions of Tor, and would allow an attacker to remotely crash
         most Tor instances, especially those compiled with extra compiler
         hardening. With this defense in place, such bugs can't crash Tor,
         though we should still fix them as they occur. Closes ticket
         20384 (TROVE-2016-10-001).

     o Minor features (geoip):
       - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
         Country database.

Revision 1.74: download - view: text, markup, annotated - select for diffs
Wed Oct 19 10:58:14 2016 UTC (8 years, 1 month ago) by wiz
Branches: MAIN
Diff to: previous 1.73: preferred, colored
Changes since revision 1.73: +5 -5 lines
Updated tor to 0.2.8.9.

Changes in version 0.2.8.9 - 2016-10-17
  Tor 0.2.8.9 backports a fix for a security hole in previous versions
  of Tor that would allow a remote attacker to crash a Tor client,
  hidden service, relay, or authority. All Tor users should upgrade to
  this version, or to 0.2.9.4-alpha. Patches will be released for older
  versions of Tor.

  o Major features (security fixes, also in 0.2.9.4-alpha):
    - Prevent a class of security bugs caused by treating the contents
      of a buffer chunk as if they were a NUL-terminated string. At
      least one such bug seems to be present in all currently used
      versions of Tor, and would allow an attacker to remotely crash
      most Tor instances, especially those compiled with extra compiler
      hardening. With this defense in place, such bugs can't crash Tor,
      though we should still fix them as they occur. Closes ticket
      20384 (TROVE-2016-10-001).

  o Minor features (geoip):
    - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
      Country database.

Revision 1.73: download - view: text, markup, annotated - select for diffs
Fri Sep 30 10:53:01 2016 UTC (8 years, 2 months ago) by wiz
Branches: MAIN
Diff to: previous 1.72: preferred, colored
Changes since revision 1.72: +5 -5 lines
Updated tor to 0.2.8.8.

Changes in version 0.2.8.8 - 2016-09-23
  Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
  0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
  who select public relays as their bridges.

  o Major bugfixes (crash):
    - Fix a complicated crash bug that could affect Tor clients
      configured to use bridges when replacing a networkstatus consensus
      in which one of their bridges was mentioned. OpenBSD users saw
      more crashes here, but all platforms were potentially affected.
      Fixes bug 20103; bugfix on 0.2.8.2-alpha.

  o Major bugfixes (relay, OOM handler):
    - Fix a timing-dependent assertion failure that could occur when we
      tried to flush from a circuit after having freed its cells because
      of an out-of-memory condition. Fixes bug 20203; bugfix on
      0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
      this one.

  o Minor feature (fallback directories):
    - Remove broken fallbacks from the hard-coded fallback directory
      list. Closes ticket 20190; patch by teor.

  o Minor features (geoip):
    - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
      Country database.

Revision 1.72: download - view: text, markup, annotated - select for diffs
Thu Aug 25 07:57:24 2016 UTC (8 years, 3 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2016Q3-base
Branch point for: pkgsrc-2016Q3
Diff to: previous 1.71: preferred, colored
Changes since revision 1.71: +5 -5 lines
Updated tor to 0.2.8.7.

Changes in version 0.2.8.7 - 2016-08-24
  Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
  option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
  who sets the ReachableAddresses option, and all bridges, are strongly
  encouraged to upgrade.

  o Directory authority changes:
    - The "Tonga" bridge authority has been retired; the new bridge
      authority is "Bifroest". Closes tickets 19728 and 19690.

  o Major bugfixes (client, security):
    - Only use the ReachableAddresses option to restrict the first hop
      in a path. In earlier versions of 0.2.8.x, it would apply to
      every hop in the path, with a possible degradation in anonymity
      for anyone using an uncommon ReachableAddress setting. Fixes bug
      19973; bugfix on 0.2.8.2-alpha.

  o Minor features (geoip):
    - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (compilation):
    - Remove an inappropriate "inline" in tortls.c that was causing
      warnings on older versions of GCC. Fixes bug 19903; bugfix
      on 0.2.8.1-alpha.

  o Minor bugfixes (fallback directories):
    - Avoid logging a NULL string pointer when loading fallback
      directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
      and 0.2.8.1-alpha. Report and patch by "rubiate".

Revision 1.71: download - view: text, markup, annotated - select for diffs
Fri Aug 19 13:35:42 2016 UTC (8 years, 3 months ago) by wiz
Branches: MAIN
Diff to: previous 1.70: preferred, colored
Changes since revision 1.70: +5 -6 lines
Updated tor to 0.2.8.6.

Changes in version 0.2.8.6 - 2016-08-02

  Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.

  The Tor 0.2.8 series improves client bootstrapping performance,
  completes the authority-side implementation of improved identity
  keys for relays, and includes numerous bugfixes and performance
  improvements throughout the program. This release continues to
  improve the coverage of Tor's test suite.

  Below is a list of the changes since Tor 0.2.7.

  o New system requirements:
    - Tor no longer attempts to support platforms where the "time_t"
      type is unsigned. (To the best of our knowledge, only OpenVMS does
      this, and Tor has never actually built on OpenVMS.) Closes
      ticket 18184.
    - Tor no longer supports versions of OpenSSL with a broken
      implementation of counter mode. (This bug was present in OpenSSL
      1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
      longer runs with, these versions.
    - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
      later (released in 2008 and 2009 respectively). If you are
      building Tor from the git repository instead of from the source
      distribution, and your tools are older than this, you will need to
      upgrade. Closes ticket 17732.

  o Directory authority changes:
    - Update the V3 identity key for the dannenberg directory authority:
      it was changed on 18 November 2015. Closes task 17906. Patch
      by teor.
    - Urras is no longer a directory authority. Closes ticket 19271.

  o Major features (directory system):
    - Include a trial list of default fallback directories, based on an
      opt-in survey of suitable relays. Doing this should make clients
      bootstrap more quickly and reliably, and reduce the load on the
      directory authorities. Closes ticket 15775. Patch by teor.
      Candidates identified using an OnionOO script by weasel, teor,
      gsathya, and karsten.
    - Previously only relays that explicitly opened a directory port
      (DirPort) accepted directory requests from clients. Now all
      relays, with and without a DirPort, accept and serve tunneled
      directory requests that they receive through their ORPort. You can
      disable this behavior using the new DirCache option. Closes
      ticket 12538.
    - When bootstrapping multiple consensus downloads at a time, use the
      first one that starts downloading, and close the rest. This
      reduces failures when authorities or fallback directories are slow
      or down. Together with the code for feature 15775, this feature
      should reduces failures due to fallback churn. Implements ticket
      4483. Patch by teor. Implements IPv4 portions of proposal 210 by
      mikeperry and teor.

  o Major features (security, Linux):
    - When Tor starts as root on Linux and is told to switch user ID, it
      can now retain the capability to bind to low ports. By default,
      Tor will do this only when it's switching user ID and some low
      ports have been configured. You can change this behavior with the
      new option KeepBindCapabilities. Closes ticket 8195.

  o Major bugfixes (client, bootstrapping):
    - Check if bootstrap consensus downloads are still needed when the
      linked connection attaches. This prevents tor making unnecessary
      begindir-style connections, which are the only directory
      connections tor clients make since the fix for 18483 was merged.
    - Fix some edge cases where consensus download connections may not
      have been closed, even though they were not needed. Related to fix
      for 18809.
    - Make relays retry consensus downloads the correct number of times,
      rather than the more aggressive client retry count. Fixes part of
      ticket 18809.

  o Major bugfixes (dns proxy mode, crash):
    - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
      bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".

  o Major bugfixes (ed25519, voting):
    - Actually enable support for authorities to match routers by their
      Ed25519 identities. Previously, the code had been written, but
      some debugging code that had accidentally been left in the
      codebase made it stay turned off. Fixes bug 17702; bugfix
      on 0.2.7.2-alpha.
    - When collating votes by Ed25519 identities, authorities now
      include a "NoEdConsensus" flag if the ed25519 value (or lack
      thereof) for a server does not reflect the majority consensus.
      Related to bug 17668; bugfix on 0.2.7.2-alpha.
    - When generating a vote with keypinning disabled, never include two
      entries for the same ed25519 identity. This bug was causing
      authorities to generate votes that they could not parse when a
      router violated key pinning by changing its RSA identity but
      keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
      18318. Bugfix on 0.2.7.2-alpha.

  o Major bugfixes (key management):
    - If OpenSSL fails to generate an RSA key, do not retain a dangling
      pointer to the previous (uninitialized) key value. The impact here
      should be limited to a difficult-to-trigger crash, if OpenSSL is
      running an engine that makes key generation failures possible, or
      if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
      0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
      Baishakhi Ray.

  o Major bugfixes (security, client, DNS proxy):
    - Stop a crash that could occur when a client running with DNSPort
      received a query with multiple address types, and the first
      address type was not supported. Found and fixed by Scott Dial.
      Fixes bug 18710; bugfix on 0.2.5.4-alpha.

  o Major bugfixes (security, compilation):
    - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
      is predefined. Previously, our use of -D_FORTIFY_SOURCE would
      cause a compiler warning, thereby making other checks fail, and
      needlessly disabling compiler-hardening support. Fixes one case of
      bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
    - Repair hardened builds under the clang compiler. Previously, our
      use of _FORTIFY_SOURCE would conflict with clang's address
      sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.

  o Major bugfixes (security, pointers):
    - Avoid a difficult-to-trigger heap corruption attack when extending
      a smartlist to contain over 16GB of pointers. Fixes bug 18162;
      bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
      Reported by Guido Vranken.

  o Major bugfixes (testing):
    - Fix a bug that would block 'make test-network-all' on systems where
      IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.

  o Major bugfixes (user interface):
    - Correctly give a warning in the cases where a relay is specified
      by nickname, and one such relay is found, but it is not officially
      Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.

  o Minor features (accounting):
    - Added two modes to the AccountingRule option: One for limiting
      only the number of bytes sent ("AccountingRule out"), and one for
      limiting only the number of bytes received ("AccountingRule in").
      Closes ticket 15989; patch from "unixninja92".

  o Minor features (bug-resistance):
    - Make Tor survive errors involving connections without a
      corresponding event object. Previously we'd fail with an
      assertion; now we produce a log message. Related to bug 16248.
    - Use tor_snprintf() and tor_vsnprintf() even in external and low-
      level code, to harden against accidental failures to NUL-
      terminate. Part of ticket 17852. Patch from jsturgix. Found
      with Flawfinder.

  o Minor features (build):
    - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
      as having possible IPFW support. Closes ticket 18448. Patch from
      Steven Chamberlain.
    - Since our build process now uses "make distcheck", we no longer
      force "make dist" to depend on "make check". Closes ticket 17893;
      patch from "cypherpunks".
    - Tor now builds once again with the recent OpenSSL 1.1 development
      branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev). We have been
      tracking OpenSSL 1.1 development as it has progressed, and fixing
      numerous compatibility issues as they arose. See tickets
      17549, 17921, 17984, 19499, and 18286.
    - When building manual pages, set the timezone to "UTC", so that the
      output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
      Patch from intrigeri.

  o Minor features (clients):
    - Make clients, onion services, and bridge relays always use an
      encrypted begindir connection for directory requests. Resolves
      ticket 18483. Patch by teor.

  o Minor features (controller):
    - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
      controllers can examine the the reject rules added by
      ExitPolicyRejectPrivate. This makes it easier for stem to display
      exit policies.
    - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
      tickets 16774 and 17817. Patch by George Tankersley.
    - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
      service descriptor from a service's local hidden service
      descriptor cache. Closes ticket 14846.

  o Minor features (crypto):
    - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
    - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
      George Tankersley.
    - Improve performance when hashing non-multiple of 8 sized buffers,
      based on Andrew Moon's public domain SipHash-2-4 implementation.
      Fixes bug 17544; bugfix on 0.2.5.3-alpha.
    - Validate the hard-coded Diffie-Hellman parameters and ensure that
      p is a safe prime, and g is a suitable generator. Closes
      ticket 18221.
    - When allocating a digest state object, allocate no more space than
      we actually need. Previously, we would allocate as much space as
      the state for the largest algorithm would need. This change saves
      up to 672 bytes per circuit. Closes ticket 17796.

  o Minor features (directory downloads):
    - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
      directory mirrors. The default is 1; set it to 0 to disable
      fallbacks. Implements ticket 17576. Patch by teor.
    - Wait for busy authorities and fallback directories to become non-
      busy when bootstrapping. (A similar change was made in 6c443e987d
      for directory caches chosen from the consensus.) Closes ticket
      17864; patch by teor.

  o Minor features (geoip):
    - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
      Country database.

  o Minor features (hidden service directory):
    - Streamline relay-side hsdir handling: when relays consider whether
      to accept an uploaded hidden service descriptor, they no longer
      check whether they are one of the relays in the network that is
      "supposed" to handle that descriptor. Implements ticket 18332.

  o Minor features (IPv6):
    - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
      to 1, tor prefers IPv6 directory addresses.
    - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
      avoids using IPv4 for client OR and directory connections.
    - Add address policy assume_action support for IPv6 addresses.
    - Add an argument 'ipv6=address:orport' to the DirAuthority and
      FallbackDir torrc options, to specify an IPv6 address for an
      authority or fallback directory. Add hard-coded ipv6 addresses for
      directory authorities that have them. Closes ticket 17327; patch
      from Nick Mathewson and teor.
    - Allow users to configure directory authorities and fallback
      directory servers with IPv6 addresses and ORPorts. Resolves
      ticket 6027.
    - Limit IPv6 mask bits to 128.
    - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
      17638; bugfix on 0.0.2pre8. Patch by teor.
    - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
      "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
      "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
    - Warn when comparing against an AF_UNSPEC address in a policy, it's
      almost always a bug. Closes ticket 17863; patch by teor.
    - routerset_parse now accepts IPv6 literal addresses. Fixes bug
      17060; bugfix on 0.2.1.3-alpha. Patch by teor.

  o Minor features (Linux seccomp2 sandbox):
    - Reject attempts to change our Address with "Sandbox 1" enabled.
      Changing Address with Sandbox turned on would never actually work,
      but previously it would fail in strange and confusing ways. Found
      while fixing 18548.

  o Minor features (logging):
    - When logging to syslog, allow a tag to be added to the syslog
      identity (the string prepended to every log message). The tag can
      be configured with SyslogIdentityTag and defaults to none. Setting
      it to "foo" will cause logs to be tagged as "Tor-foo". Closes
      ticket 17194.

  o Minor features (portability):
    - Use timingsafe_memcmp() where available. Closes ticket 17944;
      patch from <logan@hackers.mu>.

  o Minor features (relay, address discovery):
    - Add a family argument to get_interface_addresses_raw() and
      subfunctions to make network interface address interogation more
      efficient. Now Tor can specifically ask for IPv4, IPv6 or both
      types of interfaces from the operating system. Resolves
      ticket 17950.
    - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
      fails to enumerate interface addresses using the platform-specific
      API, have it rely on the UDP socket fallback technique to try and
      find out what IP addresses (both IPv4 and IPv6) our machine has.
      Resolves ticket 17951.

  o Minor features (replay cache):
    - The replay cache now uses SHA256 instead of SHA1. Implements
      feature 8961. Patch by teor, issue reported by rransom.

  o Minor features (robustness):
    - Exit immediately with an error message if the code attempts to use
      Libevent without having initialized it. This should resolve some
      frequently-made mistakes in our unit tests. Closes ticket 18241.

  o Minor features (security, clock):
    - Warn when the system clock appears to move back in time (when the
      state file was last written in the future). Tor doesn't know that
      consensuses have expired if the clock is in the past. Patch by
      teor. Implements ticket 17188.

  o Minor features (security, exit policies):
    - ExitPolicyRejectPrivate now rejects more private addresses by
      default. Specifically, it now rejects the relay's outbound bind
      addresses (if configured), and the relay's configured port
      addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
      0.2.0.11-alpha. Patch by teor.

  o Minor features (security, memory erasure):
    - Make memwipe() do nothing when passed a NULL pointer or buffer of
      zero size. Check size argument to memwipe() for underflow. Fixes
      bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
      patch by teor.
    - Set the unused entries in a smartlist to NULL. This helped catch
      a (harmless) bug, and shouldn't affect performance too much.
      Implements ticket 17026.
    - Use SecureMemoryWipe() function to securely clean memory on
      Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
      Implements feature 17986.
    - Use explicit_bzero or memset_s when present. Previously, we'd use
      OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
      from <logan@hackers.mu> and <selven@hackers.mu>.

  o Minor features (security, RNG):
    - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
      positively are not allowed to fail. Previously we depended on
      internal details of OpenSSL's behavior. Closes ticket 17686.
    - Never use the system entropy output directly for anything besides
      seeding the PRNG. When we want to generate important keys, instead
      of using system entropy directly, we now hash it with the PRNG
      stream. This may help resist certain attacks based on broken OS
      entropy implementations. Closes part of ticket 17694.
    - Use modern system calls (like getentropy() or getrandom()) to
      generate strong entropy on platforms that have them. Closes
      ticket 13696.

  o Minor features (security, win32):
    - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
      attack. Fixes bug 18123; bugfix on all tor versions. Patch
      by teor.

  o Minor features (unix domain sockets):
    - Add a new per-socket option, RelaxDirModeCheck, to allow creating
      Unix domain sockets without checking the permissions on the parent
      directory. (Tor checks permissions by default because some
      operating systems only check permissions on the parent directory.
      However, some operating systems do look at permissions on the
      socket, and tor's default check is unneeded.) Closes ticket 18458.
      Patch by weasel.

  o Minor features (unix file permissions):
    - Defer creation of Unix sockets until after setuid. This avoids
      needing CAP_CHOWN and CAP_FOWNER when using systemd's
      CapabilityBoundingSet, or chown and fowner when using SELinux.
      Implements part of ticket 17562. Patch from Jamie Nguyen.
    - If any directory created by Tor is marked as group readable, the
      filesystem group is allowed to be either the default GID or the
      root user. Allowing root to read the DataDirectory prevents the
      need for CAP_READ_SEARCH when using systemd's
      CapabilityBoundingSet, or dac_read_search when using SELinux.
      Implements part of ticket 17562. Patch from Jamie Nguyen.
    - Introduce a new DataDirectoryGroupReadable option. If it is set to
      1, the DataDirectory will be made readable by the default GID.
      Implements part of ticket 17562. Patch from Jamie Nguyen.

  o Minor bugfixes (accounting):
    - The max bandwidth when using 'AccountRule sum' is now correctly
      logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
      from "unixninja92".

  o Minor bugfixes (assert, portability):
    - Fix an assertion failure in memarea.c on systems where "long" is
      shorter than the size of a pointer. Fixes bug 18716; bugfix
      on 0.2.1.1-alpha.

  o Minor bugfixes (bootstrap):
    - Consistently use the consensus download schedule for authority
      certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.

  o Minor bugfixes (build):
    - Avoid spurious failures from configure files related to calling
      exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18625; bugfix on
      0.2.0.1-alpha. Patch from "cypherpunks".
    - Do not link the unit tests against both the testing and non-
      testing versions of the static libraries. Fixes bug 18490; bugfix
      on 0.2.7.1-alpha.
    - Resolve warnings when building on systems that are concerned with
      signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
      and 0.2.6.1-alpha.
    - Silence spurious clang-scan warnings in the ed25519_donna code by
      explicitly initializing some objects. Fixes bug 18384; bugfix on
      0.2.7.2-alpha. Patch by teor.
    - When libscrypt.h is found, but no libscrypt library can be linked,
      treat libscrypt as absent. Fixes bug 19161; bugfix
      on 0.2.6.1-alpha.
    - Cause the unit tests to compile correctly on mingw64 versions that
      lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
    - Don't try to use the pthread_condattr_setclock() function unless
      it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
      17819; bugfix on 0.2.6.3-alpha.
    - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
      on 0.2.5.2-alpha.
    - Fix search for libevent libraries on OpenBSD (and other systems
      that install libevent 1 and libevent 2 in parallel). Fixes bug
      16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
    - Isolate environment variables meant for tests from the rest of the
      build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
    - Mark all object files that include micro-revision.i as depending
      on it, so as to make parallel builds more reliable. Fixes bug
      17826; bugfix on 0.2.5.1-alpha.
    - Remove config.log only from make distclean, not from make clean.
      Fixes bug 17924; bugfix on 0.2.4.1-alpha.
    - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
      on 0.0.2pre8.
    - Remove an #endif from configure.ac so that we correctly detect the
      presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
      on 0.2.0.13-alpha.

  o Minor bugfixes (client, bootstrap):
    - Count receipt of new microdescriptors as progress towards
      bootstrapping. Previously, with EntryNodes set, Tor might not
      successfully repopulate the guard set on bootstrapping. Fixes bug
      16825; bugfix on 0.2.3.1-alpha.

  o Minor bugfixes (code correctness):
    - Fix a bad memory handling bug that would occur if we had queued a
      cell on a channel's incoming queue. Fortunately, we can't actually
      queue a cell like that as our code is constructed today, but it's
      best to avoid this kind of error, even if there isn't any code
      that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
    - Assert that allocated memory held by the reputation code is freed
      according to its internal counters. Fixes bug 17753; bugfix
      on 0.1.1.1-alpha.
    - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
      bugfix on 0.0.6.
    - Update to the latest version of Trunnel, which tries harder to
      avoid generating code that can invoke memcpy(p,NULL,0). Bug found
      by clang address sanitizer. Fixes bug 18373; bugfix
      on 0.2.7.2-alpha.
    - When closing an entry connection, generate a warning if we should
      have sent an end cell for it but we haven't. Fixes bug 17876;
      bugfix on 0.2.3.2-alpha.

  o Minor bugfixes (configuration):
    - Fix a tiny memory leak when parsing a port configuration ending in
      ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.

  o Minor bugfixes (containers):
    - If we somehow attempt to construct a heap with more than
      1073741822 elements, avoid an integer overflow when maintaining
      the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.

  o Minor bugfixes (controller, microdescriptors):
    - Make GETINFO dir/status-vote/current/consensus conform to the
      control specification by returning "551 Could not open cached
      consensus..." when not caching consensuses. Fixes bug 18920;
      bugfix on 0.2.2.6-alpha.

  o Minor bugfixes (crypto):
    - Check the return value of HMAC() and assert on failure. Fixes bug
      17658; bugfix on 0.2.3.6-alpha. Patch by teor.

  o Minor bugfixes (directories):
    - When fetching extrainfo documents, compare their SHA256 digests
      and Ed25519 signing key certificates with the routerinfo that led
      us to fetch them, rather than with the most recent routerinfo.
      Otherwise we generate many spurious warnings about mismatches.
      Fixes bug 17150; bugfix on 0.2.7.2-alpha.
    - When generating a URL for a directory server on an IPv6 address,
      wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
      on 0.2.3.9-alpha. Patch from Malek.

  o Minor bugfixes (downloading):
    - Predict more correctly whether we'll be downloading over HTTP when
      we determine the maximum length of a URL. This should avoid a
      "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
      bug 19191.

  o Minor bugfixes (exit policies, security):
    - Refresh an exit relay's exit policy when interface addresses
      change. Previously, tor only refreshed the exit policy when the
      configured external address changed. Fixes bug 18208; bugfix on
      0.2.7.3-rc. Patch by teor.

  o Minor bugfixes (fallback directories):
    - Mark fallbacks as "too busy" when they return a 503 response,
      rather than just marking authorities. Fixes bug 17572; bugfix on
      0.2.4.7-alpha. Patch by teor.
    - When requesting extrainfo descriptors from a trusted directory
      server, check whether it is an authority or a fallback directory
      which supports extrainfo descriptors. Fixes bug 18489; bugfix on
      0.2.4.7-alpha. Reported by atagar, patch by teor.

  o Minor bugfixes (hidden service, client):
    - Handle the case where the user makes several fast consecutive
      requests to the same .onion address. Previously, the first six
      requests would each trigger a descriptor fetch, each picking a
      directory (there are 6 overall) and the seventh one would fail
      because no directories were left, thereby triggering a close on
      all current directory connections asking for the hidden service.
      The solution here is to not close the connections if we have
      pending directory fetches. Fixes bug 15937; bugfix
      on 0.2.7.1-alpha.

  o Minor bugfixes (hidden service, control port):
    - Add the onion address to the HS_DESC event for the UPLOADED action
      both on success or failure. It was previously hardcoded with
      UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (hidden service, directory):
    - Bridges now refuse "rendezvous2" (hidden service descriptor)
      publish attempts. Suggested by ticket 18332.

  o Minor bugfixes (IPv6):
    - Update the limits in max_dl_per_request for IPv6 address length.
      Fixes bug 17573; bugfix on 0.2.1.5-alpha.

  o Minor bugfixes (Linux seccomp2 sandbox):
    - Allow more syscalls when running with "Sandbox 1" enabled:
      sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
      some systems, these are required for Tor to start. Fixes bug
      18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
    - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
      so that get_interface_address6_via_udp_socket_hack() can work.
      Fixes bug 19660; bugfix on 0.2.5.1-alpha.
    - Allow the setrlimit syscall, and the prlimit and prlimit64
      syscalls, which some libc implementations use under the hood.
      Fixes bug 15221; bugfix on 0.2.5.1-alpha.
    - Avoid a 10-second delay when starting as a client with "Sandbox 1"
      enabled and no DNS resolvers configured. This should help TAILS
      start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
    - Fix a crash when using offline master ed25519 keys with the Linux
      seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
    - Allow statistics to be written to disk when "Sandbox 1" is
      enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
      0.2.6.1-alpha respectively.

  o Minor bugfixes (logging):
    - In log messages that include a function name, use __FUNCTION__
      instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
      with clang __PRETTY_FUNCTION__ has extra information we don't
      need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
      der Woerdt.
    - Remove needless quotes from a log message about unparseable
      addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
    - Scrub service name in "unrecognized service ID" log messages.
      Fixes bug 18600; bugfix on 0.2.4.11-alpha.
    - When logging information about an unparsable networkstatus vote or
      consensus, do not say "vote" when we mean consensus. Fixes bug
      18368; bugfix on 0.2.0.8-alpha.
    - When we can't generate a signing key because OfflineMasterKey is
      set, do not imply that we should have been able to load it. Fixes
      bug 18133; bugfix on 0.2.7.2-alpha.
    - When logging a malformed hostname received through socks4, scrub
      it if SafeLogging says we should. Fixes bug 17419; bugfix
      on 0.1.1.16-rc.

  o Minor bugfixes (memory safety):
    - Avoid freeing an uninitialized pointer when opening a socket fails
      in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
      0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
      by teor.
    - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
      18672; bugfix on 0.2.5.1-alpha.
    - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
      on 0.2.0.1-alpha.

  o Minor bugfixes (pluggable transports):
    - Avoid reporting a spurious error when we decide that we don't need
      to terminate a pluggable transport because it has already exited.
      Fixes bug 18686; bugfix on 0.2.5.5-alpha.

  o Minor bugfixes (pointer arithmetic):
    - Fix a bug in memarea_alloc() that could have resulted in remote
      heap write access, if Tor had ever passed an unchecked size to
      memarea_alloc(). Fortunately, all the sizes we pass to
      memarea_alloc() are pre-checked to be less than 128 kilobytes.
      Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
      Guido Vranken.

  o Minor bugfixes (private directory):
    - Prevent a race condition when creating private directories. Fixes
      part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
      Patch from jsturgix. Found with Flawfinder.

  o Minor bugfixes (relays):
    - Check that both the ORPort and DirPort (if present) are reachable
      before publishing a relay descriptor. Otherwise, relays publish a
      descriptor with DirPort 0 when the DirPort reachability test takes
      longer than the ORPort reachability test. Fixes bug 18050; bugfix
      on 0.1.0.1-rc. Reported by "starlight", patch by teor.
    - Resolve some edge cases where we might launch an ORPort
      reachability check even when DisableNetwork is set. Noticed while
      fixing bug 18616; bugfix on 0.2.3.9-alpha.

  o Minor bugfixes (relays, hidden services):
    - Refuse connection requests to private OR addresses unless
      ExtendAllowPrivateAddresses is set. Previously, tor would connect,
      then refuse to send any cells to a private address. Fixes bugs
      17674 and 8976; bugfix on 0.2.3.21-rc. Patch by teor.

  o Minor bugfixes (security, hidden services):
    - Prevent hidden services connecting to client-supplied rendezvous
      addresses that are reserved as internal or multicast. Fixes bug
      8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.

  o Minor bugfixes (statistics):
    - Consistently check for overflow in round_*_to_next_multiple_of
      functions, and add unit tests with additional and maximal values.
      Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
    - Handle edge cases in the laplace functions: avoid division by
      zero, avoid taking the log of zero, and silence clang type
      conversion warnings using round and trunc. Add unit tests for edge
      cases with maximal values. Fixes part of bug 13192; bugfix
      on 0.2.6.2-alpha.
    - We now include consensus downloads via IPv6 in our directory-
      request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.

  o Minor bugfixes (test networks, IPv6):
    - Allow internal IPv6 addresses in descriptors in test networks.
      Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
      by karsten.

  o Minor bugfixes (testing):
    - Check the full results of SHA256 and SHA512 digests in the unit
      tests. Bugfix on 0.2.2.4-alpha. Patch by teor.
    - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
      on 0.2.4.8-alpha.
    - Fix a small memory leak that would occur when the
      TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
      bugfix on 0.2.5.2-alpha.
    - Make unit tests pass on IPv6-only systems, and systems without
      localhost addresses (like some FreeBSD jails). Fixes bug 17632;
      bugfix on 0.2.7.3-rc. Patch by teor.
    - The test for log_heartbeat was incorrectly failing in timezones
      with non-integer offsets. Instead of comparing the end of the time
      string against a constant, compare it to the output of
      format_local_iso_time when given the correct input. Fixes bug
      18039; bugfix on 0.2.5.4-alpha.
    - We no longer disable assertions in the unit tests when coverage is
      enabled. Instead, we require you to say --disable-asserts-in-tests
      to the configure script if you need assertions disabled in the
      unit tests (for example, if you want to perform branch coverage).
      Fixes bug 18242; bugfix on 0.2.7.1-alpha.

  o Minor bugfixes (time handling):
    - When correcting a corrupt 'struct tm' value, fill in the tm_wday
      field. Otherwise, our unit tests crash on Windows. Fixes bug
      18977; bugfix on 0.2.2.25-alpha.
    - Avoid overflow in tor_timegm when parsing dates in and after 2038
      on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
      0.0.2pre14. Patch by teor.

  o Minor bugfixes (tor-gencert):
    - Correctly handle the case where an authority operator enters a
      passphrase but sends an EOF before sending a newline. Fixes bug
      17443; bugfix on 0.2.0.20-rc. Found by junglefowl.

  o Code simplification and refactoring:
    - Clean up a little duplicated code in
      crypto_expand_key_material_TAP(). Closes ticket 17587; patch
      from "pfrankw".
    - Decouple the list of streams waiting to be attached to circuits
      from the overall connection list. This change makes it possible to
      attach streams quickly while simplifying Tor's callgraph and
      avoiding O(N) scans of the entire connection list. Closes
      ticket 17590.
    - Extract the more complicated parts of circuit_mark_for_close()
      into a new function that we run periodically before circuits are
      freed. This change removes more than half of the functions
      currently in the "blob". Closes ticket 17218.
    - Move logging of redundant policy entries in
      policies_parse_exit_policy_internal into its own function. Closes
      ticket 17608; patch from "juce".
    - Quote all the string interpolations in configure.ac -- even those
      which we are pretty sure can't contain spaces. Closes ticket
      17744. Patch from zerosion.
    - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
      use them. Closes ticket 17926.
    - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
      inplace, so there's no need to have a separate implementation for
      the non-inplace code. Closes ticket 18258. Patch from Malek.
    - Simplify return types for some crypto functions that can't
      actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
    - When a direct directory request fails immediately on launch,
      instead of relaunching that request from inside the code that
      launches it, instead mark the connection for teardown. This change
      simplifies Tor's callback and prevents the directory-request
      launching code from invoking itself recursively. Closes
      ticket 17589.

  o Documentation:
    - Add a description of the correct use of the '--keygen' command-
      line option. Closes ticket 17583; based on text by 's7r'.
    - Change build messages to refer to "Fedora" instead of "Fedora
      Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
      Patches from "icanhasaccount" and "cypherpunks".
    - Document the contents of the 'datadir/keys' subdirectory in the
      manual page. Closes ticket 17621.
    - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
    - Explain actual minima for BandwidthRate. Closes ticket 16382.
    - Fix a minor formatting typo in the manpage. Closes ticket 17791.
    - Mention torspec URL in the manpage and point the reader to it
      whenever we mention a document that belongs in torspce. Fixes
      issue 17392.
    - Stop recommending use of nicknames to identify relays in our
      MapAddress documentation. Closes ticket 18312.

  o Removed features:
    - Remove client-side support for connecting to Tor relays running
      versions of Tor before 0.2.3.6-alpha. These relays didn't support
      the v3 TLS handshake protocol, and are no longer allowed on the
      Tor network. Implements the client side of ticket 11150. Based on
      patches by Tom van der Woerdt.
    - We no longer maintain an internal freelist in memarea.c.
      Allocators should be good enough to make this code unnecessary,
      and it's doubtful that it ever had any performance benefit.

  o Testing:
    - Add unit tests to check for common RNG failure modes, such as
      returning all zeroes, identical values, or incrementing values
      (OpenSSL's rand_predictable feature). Patch by teor.
    - Always test both ed25519 backends, so that we can be sure that our
      batch-open replacement code works. Part of ticket 16794.
    - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
      portion of ticket 16831.
    - Fix several warnings from clang's address sanitizer produced in
      the unit tests.
    - Log more information when the backtrace tests fail. Closes ticket
      17892. Patch from "cypherpunks."
    - More unit tests for compat_libevent.c, procmon.c, tortls.c,
      util_format.c, directory.c, and options_validate.c. Closes tickets
      17075, 17082, 17084, 17003, and 17076 respectively. Patches from
      Ola Bini.
    - Treat backtrace test failures as expected on FreeBSD until we
      solve bug 17808. Closes ticket 18204.
    - Unit tests for directory_handle_command_get. Closes ticket 17004.
      Patch from Reinaldo de Souza Jr.

Revision 1.70: download - view: text, markup, annotated - select for diffs
Sun Dec 13 21:24:01 2015 UTC (8 years, 11 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2016Q2-base, pkgsrc-2016Q2, pkgsrc-2016Q1-base, pkgsrc-2016Q1, pkgsrc-2015Q4-base, pkgsrc-2015Q4
Diff to: previous 1.69: preferred, colored
Changes since revision 1.69: +5 -5 lines
Update tor to 0.2.7.6:

Changes in version 0.2.7.6 - 2015-12-10
  Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
  well as a minor bug in hidden service reliability.

  o Major bugfixes (guard selection):
    - Actually look at the Guard flag when selecting a new directory
      guard. When we implemented the directory guard design, we
      accidentally started treating all relays as if they have the Guard
      flag during guard selection, leading to weaker anonymity and worse
      performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
      by Mohsen Imani.

  o Minor features (geoip):
    - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (compilation):
    - When checking for net/pfvar.h, include netinet/in.h if possible.
      This fixes transparent proxy detection on OpenBSD. Fixes bug
      17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
    - Fix a compilation warning with Clang 3.6: Do not check the
      presence of an address which can never be NULL. Fixes bug 17781.

  o Minor bugfixes (correctness):
    - When displaying an IPv6 exit policy, include the mask bits
      correctly even when the number is greater than 31. Fixes bug
      16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
    - The wrong list was used when looking up expired intro points in a
      rend service object, causing what we think could be reachability
      issues for hidden services, and triggering a BUG log. Fixes bug
      16702; bugfix on 0.2.7.2-alpha.
    - Fix undefined behavior in the tor_cert_checksig function. Fixes
      bug 17722; bugfix on 0.2.7.2-alpha.

Revision 1.69: download - view: text, markup, annotated - select for diffs
Fri Dec 11 12:13:00 2015 UTC (8 years, 11 months ago) by wiz
Branches: MAIN
Diff to: previous 1.68: preferred, colored
Changes since revision 1.68: +2 -1 lines
Fix two problems when building on NetBSD-6.x.

Mention upstream bug reports filed for them.

Addresses PR 50521 by Uwe Toenjes.

While here, add reload command to rc.d script and bump PKGREVISION.

Revision 1.68: download - view: text, markup, annotated - select for diffs
Tue Dec 8 13:19:38 2015 UTC (8 years, 11 months ago) by wiz
Branches: MAIN
Diff to: previous 1.67: preferred, colored
Changes since revision 1.67: +5 -6 lines
Update tor to latest stable release, 0.2.7.5.

Changes in version 0.2.7.5 - 2015-11-20
  The Tor 0.2.7 release series is dedicated to the memory of Tor user
  and privacy advocate Caspar Bowden (1961-2015). Caspar worked
  tirelessly to advocate human rights regardless of national borders,
  and oppose the encroachments of mass surveillance. He opposed national
  exceptionalism, he brought clarity to legal and policy debates, he
  understood and predicted the impact of mass surveillance on the world,
  and he laid the groundwork for resisting it. While serving on the Tor
  Project's board of directors, he brought us his uncompromising focus
  on technical excellence in the service of humankind. Caspar was an
  inimitable force for good and a wonderful friend. He was kind,
  humorous, generous, gallant, and believed we should protect one
  another without exception. We honor him here for his ideals, his
  efforts, and his accomplishments. Please honor his memory with works
  that would make him proud.

  Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.

  The 0.2.7 series adds a more secure identity key type for relays,
  improves cryptography performance, resolves several longstanding
  hidden-service performance issues, improves controller support for
  hidden services, and includes small bugfixes and performance
  improvements throughout the program. This release series also includes
  more tests than before, and significant simplifications to which parts
  of Tor invoke which others.

  (This release contains no code changes since 0.2.7.4-rc.)


Changes in version 0.2.7.4-rc - 2015-10-21
  Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
  fixes some important memory leaks, and a scary-looking (but mostly
  harmless in practice) invalid-read bug. It also has a few small
  bugfixes, notably fixes for compilation and portability on different
  platforms. If no further significant bounds are found, the next
  release will the the official stable release.

  o Major bugfixes (security, correctness):
    - Fix an error that could cause us to read 4 bytes before the
      beginning of an openssl string. This bug could be used to cause
      Tor to crash on systems with unusual malloc implementations, or
      systems with unusual hardening installed. Fixes bug 17404; bugfix
      on 0.2.3.6-alpha.

  o Major bugfixes (correctness):
    - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
      bug 17401; bugfix on 0.2.7.3-rc.

  o Major bugfixes (memory leaks):
    - Fix a memory leak in ed25519 batch signature checking. Fixes bug
      17398; bugfix on 0.2.6.1-alpha.
    - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
      17402; bugfix on 0.2.7.3-rc.
    - Fix a memory leak when reading an expired signing key from disk.
      Fixes bug 17403; bugfix on 0.2.7.2-rc.

  o Minor features (geoIP):
    - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (compilation):
    - Repair compilation with the most recent (unreleased, alpha)
      vesions of OpenSSL 1.1. Fixes part of ticket 17237.
    - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
      17251; bugfix on 0.2.7.2-alpha.
    - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
      bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.

  o Minor bugfixes (portability):
    - Use libexecinfo on FreeBSD to enable backtrace support. Fixes part
      of bug 17151; bugfix on 0.2.5.2-alpha. Patch from Marcin Cieślak.

  o Minor bugfixes (sandbox):
    - Add the "hidserv-stats" filename to our sandbox filter for the
      HiddenServiceStatistics option to work properly. Fixes bug 17354;
      bugfix on tor-0.2.6.2-alpha. Patch from David Goulet.

  o Minor bugfixes (testing):
    - Add unit tests for get_interface_address* failure cases. Fixes bug
      17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
    - Fix breakage when running 'make check' with BSD make. Fixes bug
      17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
    - Make the get_ifaddrs_* unit tests more tolerant of different
      network configurations. (Don't assume every test box has an IPv4
      address, and don't assume every test box has a non-localhost
      address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
    - Skip backtrace tests when backtrace support is not compiled in.
      Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
      Marcin Cieślak.

  o Documentation:
    - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
    - Note that HiddenServicePorts can take a unix domain socket. Closes
      ticket 17364.


Changes in version 0.2.7.3-rc - 2015-09-25
  Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
  contains numerous usability fixes for Ed25519 keys, safeguards against
  several misconfiguration problems, significant simplifications to
  Tor's callgraph, and numerous bugfixes and small features.

  This is the most tested release of Tor to date. The unit tests cover
  39.40% of the code, and the integration tests (accessible with "make
  test-full-online", requiring stem and chutney and a network
  connection) raise the coverage to 64.49%.

  o Major features (security, hidden services):
    - Hidden services, if using the EntryNodes option, are required to
      use more than one EntryNode, in order to avoid a guard discovery
      attack. (This would only affect people who had configured hidden
      services and manually specified the EntryNodes option with a
      single entry-node. The impact was that it would be easy to
      remotely identify the guard node used by such a hidden service.
      See ticket for more information.) Fixes ticket 14917.

  o Major features (Ed25519 keys, keypinning):
    - The key-pinning option on directory authorities is now advisory-
      only by default. In a future version, or when the AuthDirPinKeys
      option is set, pins are enforced again. Disabling key-pinning
      seemed like a good idea so that we can survive the fallout of any
      usability problems associated with Ed25519 keys. Closes
      ticket 17135.

  o Major features (Ed25519 performance):
    - Improve the speed of Ed25519 operations and Curve25519 keypair
      generation when built targeting 32 bit x86 platforms with SSE2
      available. Implements ticket 16535.
    - Improve the runtime speed of Ed25519 signature verification by
      using Ed25519-donna's batch verification support. Implements
      ticket 16533.

  o Major features (performance testing):
    - The test-network.sh script now supports performance testing.
      Requires corresponding chutney performance testing changes. Patch
      by "teor". Closes ticket 14175.

  o Major features (relay, Ed25519):
    - Significant usability improvements for Ed25519 key management. Log
      messages are better, and the code can recover from far more
      failure conditions. Thanks to "s7r" for reporting and diagnosing
      so many of these!
    - Add a new OfflineMasterKey option to tell Tor never to try loading
      or generating a secret Ed25519 identity key. You can use this in
      combination with tor --keygen to manage offline and/or encrypted
      Ed25519 keys. Implements ticket 16944.
    - Add a --newpass option to allow changing or removing the
      passphrase of an encrypted key with tor --keygen. Implements part
      of ticket 16769.
    - On receiving a HUP signal, check to see whether the Ed25519
      signing key has changed, and reload it if so. Closes ticket 16790.

  o Major bugfixes (relay, Ed25519):
    - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
      0.2.7.2-alpha. Reported by "s7r".
    - Improve handling of expired signing keys with offline master keys.
      Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".

  o Minor features (client-side privacy):
    - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
      lifespan when IsolateSOCKSAuth and streams with SOCKS
      authentication are attached to the circuit. This allows
      applications like TorBrowser to manage circuit lifetime on their
      own. Implements feature 15482.
    - When logging malformed hostnames from SOCKS5 requests, respect
      SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.

  o Minor features (compilation):
    - Give a warning as early as possible when trying to build with an
      unsupported OpenSSL version. Closes ticket 16901.
    - Fail during configure if we're trying to build against an OpenSSL
      built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
      which started requiring ECC.

  o Minor features (geoip):
    - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
      Country database.

  o Minor features (hidden services):
    - Relays need to have the Fast flag to get the HSDir flag. As this
      is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
      drop. This change should make some attacks against the hidden
      service directory system harder. Fixes ticket 15963.
    - Turn on hidden service statistics collection by setting the torrc
      option HiddenServiceStatistics to "1" by default. (This keeps
      track only of the fraction of traffic used by hidden services, and
      the total number of hidden services in existence.) Closes
      ticket 15254.
    - Client now uses an introduction point failure cache to know when
      to fetch or keep a descriptor in their cache. Previously, failures
      were recorded implicitly, but not explicitly remembered. Closes
      ticket 16389.

  o Minor features (testing, authorities, documentation):
    - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
      explicitly manage consensus flags in testing networks. Patch by
      "robgjansen", modified by "teor". Implements part of ticket 14882.

  o Minor bugfixes (security, exit policies):
    - ExitPolicyRejectPrivate now also rejects the relay's published
      IPv6 address (if any), and any publicly routable IPv4 or IPv6
      addresses on any local interfaces. ticket 17027. Patch by "teor".
      Fixes bug 17027; bugfix on 0.2.0.11-alpha.

  o Minor bug fixes (torrc exit policies):
    - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
      produce IPv6 wildcard addresses. Previously they would produce
      both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
      of bug 16069; bugfix on 0.2.4.7-alpha.
    - When parsing torrc ExitPolicies, we now warn for a number of cases
      where the user's intent is likely to differ from Tor's actual
      behavior. These include: using an IPv4 address with an accept6 or
      reject6 line; using "private" on an accept6 or reject6 line; and
      including any ExitPolicy lines after accept *:* or reject *:*.
      Related to ticket 16069.
    - When parsing torrc ExitPolicies, we now issue an info-level
      message when expanding an "accept/reject *" line to include both
      IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
    - In each instance above, usage advice is provided to avoid the
      message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
      16069; bugfix on 0.2.4.7-alpha.

  o Minor bugfixes (authority):
    - Don't assign "HSDir" to a router if it isn't Valid and Running.
      Fixes bug 16524; bugfix on 0.2.7.2-alpha.
    - Downgrade log messages about Ed25519 key issues if they are in old
      cached router descriptors. Fixes part of bug 16286; bugfix
      on 0.2.7.2-alpha.
    - When we find an Ed25519 key issue in a cached descriptor, stop
      saying the descriptor was just "uploaded". Fixes another part of
      bug 16286; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (control port):
    - Repair a warning and a spurious result when getting the maximum
      number of file descriptors from the controller. Fixes bug 16697;
      bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (correctness):
    - When calling channel_free_list(), avoid calling smartlist_remove()
      while inside a FOREACH loop. This partially reverts commit
      17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
      incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.

  o Minor bugfixes (documentation):
    - Advise users on how to configure separate IPv4 and IPv6 exit
      policies in the manpage and sample torrcs. Related to ticket 16069.
    - Fix the usage message of tor-resolve(1) so that it no longer lists
      the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
    - Fix an error in the manual page and comments for
      TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
      required "ORPort connectivity". While this is true, it is in no
      way unique to the HSDir flag. Of all the flags, only HSDirs need a
      DirPort configured in order for the authorities to assign that
      particular flag. Patch by "teor". Fixed as part of 14882; bugfix
      on 0.2.6.3-alpha.

  o Minor bugfixes (Ed25519):
    - Fix a memory leak when reading router descriptors with expired
      Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (linux seccomp2 sandbox):
    - Allow bridge authorities to run correctly under the seccomp2
      sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
    - Allow routers with ed25519 keys to run correctly under the
      seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (open file limit):
    - Fix set_max_file_descriptors() to set by default the max open file
      limit to the current limit when setrlimit() fails. Fixes bug
      16274; bugfix on tor- 0.2.0.10-alpha. Patch by dgoulet.

  o Minor bugfixes (portability):
    - Try harder to normalize the exit status of the Tor process to the
      standard-provided range. Fixes bug 16975; bugfix on every version
      of Tor ever.
    - Check correctly for Windows socket errors in the workqueue
      backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
    - Fix the behavior of crypto_rand_time_range() when told to consider
      times before 1970. (These times were possible when running in a
      simulated network environment where time()'s output starts at
      zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
    - Restore correct operation of TLS client-cipher detection on
      OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.

  o Minor bugfixes (relay):
    - Ensure that worker threads actually exit when a fatal error or
      shutdown is indicated. This fix doesn't currently affect the
      behavior of Tor, because Tor workers never indicates fatal error
      or shutdown except in the unit tests. Fixes bug 16868; bugfix
      on 0.2.6.3-alpha.
    - Unblock threads before releasing the work queue mutex to ensure
      predictable scheduling behavior. Fixes bug 16644; bugfix
      on 0.2.6.3-alpha.

  o Code simplification and refactoring:
    - Change the function that's called when we need to retry all
      downloads so that it only reschedules the downloads to happen
      immediately, rather than launching them all at once itself. This
      further simplifies Tor's callgraph.
    - Move some format-parsing functions out of crypto.c and
      crypto_curve25519.c into crypto_format.c and/or util_format.c.
    - Move the client-only parts of init_keys() into a separate
      function. Closes ticket 16763.
    - Simplify the microdesc_free() implementation so that it no longer
      appears (to code analysis tools) to potentially invoke a huge
      suite of other microdesc functions.
    - Simply the control graph further by deferring the inner body of
      directory_all_unreachable() into a callback. Closes ticket 16762.
    - Treat the loss of an owning controller as equivalent to a SIGTERM
      signal. This removes a tiny amount of duplicated code, and
      simplifies our callgraph. Closes ticket 16788.
    - When generating an event to send to the controller, we no longer
      put the event over the network immediately. Instead, we queue
      these events, and use a Libevent callback to deliver them. This
      change simplifies Tor's callgraph by reducing the number of
      functions from which all other Tor functions are reachable. Closes
      ticket 16695.
    - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
      that try to scan or compile every file on Unix won't decide that
      they are broken.
    - Remove the unused "nulterminate" argument from buf_pullup().

  o Documentation:
    - Recommend a 40 GB example AccountingMax in torrc.sample rather
      than a 4 GB max. Closes ticket 16742.
    - Include the TUNING document in our source tarball. It is referred
      to in the ChangeLog and an error message. Fixes bug 16929; bugfix
      on 0.2.6.1-alpha.

  o Removed code:
    - The internal pure-C tor-fw-helper tool is now removed from the Tor
      distribution, in favor of the pure-Go clone available from
      https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
      used by the C tor-fw-helper are not, in our opinion, very
      confidence- inspiring in their secure-programming techniques.
      Closes ticket 13338.
    - Remove the code that would try to aggressively flush controller
      connections while writing to them. This code was introduced in
      0.1.2.7-alpha, in order to keep output buffers from exceeding
      their limits. But there is no longer a maximum output buffer size,
      and flushing data in this way caused some undesirable recursions
      in our call graph. Closes ticket 16480.

  o Testing:
    - Make "bridges+hs" the default test network. This tests almost all
      tor functionality during make test-network, while allowing tests
      to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
      test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
      (chutney). Patches by "teor".
    - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
      by-side in the same parent directory. Closes ticket 16903. Patch
      by "teor".
    - Use environment variables rather than autoconf substitutions to
      send variables from the build system to the test scripts. This
      change should be easier to maintain, and cause 'make distcheck' to
      work better than before. Fixes bug 17148.
    - Add a new set of callgraph analysis scripts that use clang to
      produce a list of which Tor functions are reachable from which
      other Tor functions. We're planning to use these to help simplify
      our code structure by identifying illogical dependencies.
    - Add new 'test-full' and 'test-full-online' targets to run all
      tests, including integration tests with stem and chutney.
    - Make the test-workqueue test work on Windows by initializing the
      network before we begin.
    - New make target (make test-network-all) to run multiple applicable
      chutney test cases. Patch from Teor; closes 16953.
    - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
      functions in dns.c. Implements a portion of ticket 16831.
    - When building Tor with testing coverage enabled, run Chutney tests
      (if any) using the 'tor-cov' coverage binary.
    - When running test-network or test-stem, check for the absence of
      stem/chutney before doing any build operations.


Changes in version 0.2.7.2-alpha - 2015-07-27
  This, the second alpha in the Tor 0.2.7 series, has a number of new
  features, including a way to manually pick the number of introduction
  points for hidden services, and the much stronger Ed25519 signing key
  algorithm for regular Tor relays (including support for encrypted
  offline identity keys in the new algorithm).

  Support for Ed25519 on relays is currently limited to signing router
  descriptors; later alphas in this series will extend Ed25519 key
  support to more parts of the Tor protocol.

  o Major features (Ed25519 identity keys, Proposal 220):
    - All relays now maintain a stronger identity key, using the Ed25519
      elliptic curve signature format. This master key is designed so
      that it can be kept offline. Relays also generate an online
      signing key, and a set of other Ed25519 keys and certificates.
      These are all automatically regenerated and rotated as needed.
      Implements part of ticket 12498.
    - Directory authorities now vote on Ed25519 identity keys along with
      RSA1024 keys. Implements part of ticket 12498.
    - Directory authorities track which Ed25519 identity keys have been
      used with which RSA1024 identity keys, and do not allow them to
      vary freely. Implements part of ticket 12498.
    - Microdescriptors now include Ed25519 identity keys. Implements
      part of ticket 12498.
    - Add support for offline encrypted Ed25519 master keys. To use this
      feature on your tor relay, run "tor --keygen" to make a new master
      key (or to make a new signing key if you already have a master
      key). Closes ticket 13642.

  o Major features (Hidden services):
    - Add the torrc option HiddenServiceNumIntroductionPoints, to
      specify a fixed number of introduction points. Its maximum value
      is 10 and default is 3. Using this option can increase a hidden
      service's reliability under load, at the cost of making it more
      visible that the hidden service is facing extra load. Closes
      ticket 4862.
    - Remove the adaptive algorithm for choosing the number of
      introduction points, which used to change the number of
      introduction points (poorly) depending on the number of
      connections the HS sees. Closes ticket 4862.

  o Major features (onion key cross-certification):
    - Relay descriptors now include signatures of their own identity
      keys, made using the TAP and ntor onion keys. These signatures
      allow relays to prove ownership of their own onion keys. Because
      of this change, microdescriptors will no longer need to include
      RSA identity keys. Implements proposal 228; closes ticket 12499.

  o Major features (performance):
    - Improve the runtime speed of Ed25519 operations by using the
      public-domain Ed25519-donna by Andrew M. ("floodyberry").
      Implements ticket 16467.
    - Improve the runtime speed of the ntor handshake by using an
      optimized curve25519 basepoint scalarmult implementation from the
      public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
      ideas by Adam Langley. Implements ticket 9663.

  o Major bugfixes (client-side privacy, also in 0.2.6.9):
    - Properly separate out each SOCKSPort when applying stream
      isolation. The error occurred because each port's session group
      was being overwritten by a default value when the listener
      connection was initialized. Fixes bug 16247; bugfix on
      0.2.6.3-alpha. Patch by "jojelino".

  o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
    - Stop refusing to store updated hidden service descriptors on a
      client. This reverts commit 9407040c59218 (which indeed fixed bug
      14219, but introduced a major hidden service reachability
      regression detailed in bug 16381). This is a temporary fix since
      we can live with the minor issue in bug 14219 (it just results in
      some load on the network) but the regression of 16381 is too much
      of a setback. First-round fix for bug 16381; bugfix
      on 0.2.6.3-alpha.

  o Major bugfixes (hidden services):
    - When cannibalizing a circuit for an introduction point, always
      extend to the chosen exit node (creating a 4 hop circuit).
      Previously Tor would use the current circuit exit node, which
      changed the original choice of introduction point, and could cause
      the hidden service to skip excluded introduction points or
      reconnect to a skipped introduction point. Fixes bug 16260; bugfix
      on 0.1.0.1-rc.

  o Major bugfixes (open file limit):
    - The open file limit wasn't checked before calling
      tor_accept_socket_nonblocking(), which would make Tor exceed the
      limit. Now, before opening a new socket, Tor validates the open
      file limit just before, and if the max has been reached, return an
      error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.

  o Major bugfixes (stability, also in 0.2.6.10):
    - Stop crashing with an assertion failure when parsing certain kinds
      of malformed or truncated microdescriptors. Fixes bug 16400;
      bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
      by "cypherpunks_backup".
    - Stop random client-side assertion failures that could occur when
      connecting to a busy hidden service, or connecting to a hidden
      service while a NEWNYM is in progress. Fixes bug 16013; bugfix
      on 0.1.0.1-rc.

  o Minor features (directory authorities, security, also in 0.2.6.9):
    - The HSDir flag given by authorities now requires the Stable flag.
      For the current network, this results in going from 2887 to 2806
      HSDirs. Also, it makes it harder for an attacker to launch a sybil
      attack by raising the effort for a relay to become Stable to
      require at the very least 7 days, while maintaining the 96 hours
      uptime requirement for HSDir. Implements ticket 8243.

  o Minor features (client):
    - Relax the validation of hostnames in SOCKS5 requests, allowing the
      character '_' to appear, in order to cope with domains observed in
      the wild that are serving non-RFC compliant records. Resolves
      ticket 16430.
    - Relax the validation done to hostnames in SOCKS5 requests, and
      allow a single trailing '.' to cope with clients that pass FQDNs
      using that syntax to explicitly indicate that the domain name is
      fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
    - Add GroupWritable and WorldWritable options to unix-socket based
      SocksPort and ControlPort options. These options apply to a single
      socket, and override {Control,Socks}SocketsGroupWritable. Closes
      ticket 15220.

  o Minor features (control protocol):
    - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
      the control protocol. Resolves ticket 15358.

  o Minor features (directory authorities):
    - Directory authorities no longer vote against the "Fast", "Stable",
      and "HSDir" flags just because they were going to vote against
      "Running": if the consensus turns out to be that the router was
      running, then the authority's vote should count. Patch from Peter
      Retzlaff; closes issue 8712.

  o Minor features (geoip, also in 0.2.6.10):
    - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
    - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.

  o Minor features (hidden services):
    - Add the new options "HiddenServiceMaxStreams" and
      "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
      limit the maximum number of simultaneous streams per circuit, and
      optionally tear down the circuit when the limit is exceeded. Part
      of ticket 16052.

  o Minor features (portability):
    - Use C99 variadic macros when the compiler is not GCC. This avoids
      failing compilations on MSVC, and fixes a log-file-based race
      condition in our old workarounds. Original patch from Gisle Vanem.

  o Minor bugfixes (compilation, also in 0.2.6.9):
    - Build with --enable-systemd correctly when libsystemd is
      installed, but systemd is not. Fixes bug 16164; bugfix on
      0.2.6.3-alpha. Patch from Peter Palfrader.

  o Minor bugfixes (controller):
    - Add the descriptor ID in each HS_DESC control event. It was
      missing, but specified in control-spec.txt. Fixes bug 15881;
      bugfix on 0.2.5.2-alpha.

  o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
    - Check for failures from crypto_early_init, and refuse to continue.
      A previous typo meant that we could keep going with an
      uninitialized crypto library, and would have OpenSSL initialize
      its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
      when implementing ticket 4900. Patch by "teor".

  o Minor bugfixes (hidden services):
    - Fix a crash when reloading configuration while at least one
      configured and one ephemeral hidden service exists. Fixes bug
      16060; bugfix on 0.2.7.1-alpha.
    - Avoid crashing with a double-free bug when we create an ephemeral
      hidden service but adding it fails for some reason. Fixes bug
      16228; bugfix on 0.2.7.1-alpha.

  o Minor bugfixes (Linux seccomp2 sandbox):
    - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
      defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.

  o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
    - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
      these when eventfd2() support is missing. Fixes bug 16363; bugfix
      on 0.2.6.3-alpha. Patch from "teor".

  o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
    - Fix sandboxing to work when running as a relay, by allowing the
      renaming of secret_id_key, and allowing the eventfd2 and futex
      syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
      Peter Palfrader.
    - Allow systemd connections to work with the Linux seccomp2 sandbox
      code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
      Peter Palfrader.

  o Minor bugfixes (relay):
    - Fix a rarely-encountered memory leak when failing to initialize
      the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
      from "cypherpunks".

  o Minor bugfixes (systemd):
    - Fix an accidental formatting error that broke the systemd
      configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
    - Tor's systemd unit file no longer contains extraneous spaces.
      These spaces would sometimes confuse tools like deb-systemd-
      helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.

  o Minor bugfixes (tests):
    - Use the configured Python executable when running test-stem-full.
      Fixes bug 16470; bugfix on 0.2.7.1-alpha.

  o Minor bugfixes (tests, also in 0.2.6.9):
    - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
      16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".

  o Minor bugfixes (threads, comments):
    - Always initialize return value in compute_desc_id in rendcommon.c
      Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
    - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
      Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
    - Remove undefined directive-in-macro in test_util_writepid clang
      3.7 complains that using a preprocessor directive inside a macro
      invocation in test_util_writepid in test_util.c is undefined.
      Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.

  o Code simplification and refactoring:
    - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
      to ensure they remain consistent and visible everywhere.
    - Remove some vestigial workarounds for the MSVC6 compiler. We
      haven't supported that in ages.
    - The link authentication code has been refactored for better
      testability and reliability. It now uses code generated with the
      "trunnel" binary encoding generator, to reduce the risk of bugs
      due to programmer error. Done as part of ticket 12498.

  o Documentation:
    - Include a specific and (hopefully) accurate documentation of the
      torrc file's meta-format in doc/torrc_format.txt. This is mainly
      of interest to people writing programs to parse or generate torrc
      files. This document is not a commitment to long-term
      compatibility; some aspects of the current format are a bit
      ridiculous. Closes ticket 2325.

  o Removed features:
    - Tor no longer supports copies of OpenSSL that are missing support
      for Elliptic Curve Cryptography. (We began using ECC when
      available in 0.2.4.8-alpha, for more safe and efficient key
      negotiation.) In particular, support for at least one of P256 or
      P224 is now required, with manual configuration needed if only
      P224 is available. Resolves ticket 16140.
    - Tor no longer supports versions of OpenSSL before 1.0. (If you are
      on an operating system that has not upgraded to OpenSSL 1.0 or
      later, and you compile Tor from source, you will need to install a
      more recent OpenSSL to link Tor against.) These versions of
      OpenSSL are still supported by the OpenSSL, but the numerous
      cryptographic improvements in later OpenSSL releases makes them a
      clear choice. Resolves ticket 16034.
    - Remove the HidServDirectoryV2 option. Now all relays offer to
      store hidden service descriptors. Related to 16543.
    - Remove the VoteOnHidServDirectoriesV2 option, since all
      authorities have long set it to 1. Closes ticket 16543.

  o Testing:
    - Document use of coverity, clang static analyzer, and clang dynamic
      undefined behavior and address sanitizers in doc/HACKING. Include
      detailed usage instructions in the blacklist. Patch by "teor".
      Closes ticket 15817.
    - The link authentication protocol code now has extensive tests.
    - The relay descriptor signature testing code now has
      extensive tests.
    - The test_workqueue program now runs faster, and is enabled by
      default as a part of "make check".
    - Now that OpenSSL has its own scrypt implementation, add an unit
      test that checks for interoperability between libscrypt_scrypt()
      and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
      and rely on EVP_PBE_scrypt() whenever possible. Resolves
      ticket 16189.

Revision 1.67: download - view: text, markup, annotated - select for diffs
Wed Nov 4 00:35:41 2015 UTC (9 years, 1 month ago) by agc
Branches: MAIN
Diff to: previous 1.66: preferred, colored
Changes since revision 1.66: +2 -1 lines
Add SHA512 digests for distfiles for net category

Problems found with existing digests:
	Package haproxy distfile haproxy-1.5.14.tar.gz
	159f5beb8fdc6b8059ae51b53dc935d91c0fb51f [recorded]
	da39a3ee5e6b4b0d3255bfef95601890afd80709 [calculated]

Problems found locating distfiles:
	Package bsddip: missing distfile bsddip-1.02.tar.Z
	Package citrix_ica: missing distfile citrix_ica-10.6.115659/en.linuxx86.tar.gz
	Package djbdns: missing distfile djbdns-1.05-test25.diff.bz2
	Package djbdns: missing distfile djbdns-cachestats.patch
	Package djbdns: missing distfile 0002-dnscache-cache-soa-records.patch
	Package gated: missing distfile gated-3-5-11.tar.gz
	Package owncloudclient: missing distfile owncloudclient-2.0.2.tar.xz
	Package poink: missing distfile poink-1.6.tar.gz
	Package ra-rtsp-proxy: missing distfile rtspd-src-1.0.0.0.tar.gz
	Package ucspi-ssl: missing distfile ucspi-ssl-0.70-ucspitls-0.1.patch
	Package waste: missing distfile waste-source.tar.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Revision 1.66: download - view: text, markup, annotated - select for diffs
Sun Jul 19 12:04:47 2015 UTC (9 years, 4 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2015Q3-base, pkgsrc-2015Q3
Diff to: previous 1.65: preferred, colored
Changes since revision 1.65: +4 -4 lines
Update to 0.2.6.10:

Changes in version 0.2.6.10 - 2015-07-12
  Tor version 0.2.6.10 fixes some significant stability and hidden
  service client bugs, bulletproofs the cryptography init process, and
  fixes a bug when using the sandbox code with some older versions of
  Linux. Everyone running an older version, especially an older version
  of 0.2.6, should upgrade.

  o Major bugfixes (hidden service clients, stability):
    - Stop refusing to store updated hidden service descriptors on a
      client. This reverts commit 9407040c59218 (which indeed fixed bug
      14219, but introduced a major hidden service reachability
      regression detailed in bug 16381). This is a temporary fix since
      we can live with the minor issue in bug 14219 (it just results in
      some load on the network) but the regression of 16381 is too much
      of a setback. First-round fix for bug 16381; bugfix
      on 0.2.6.3-alpha.

  o Major bugfixes (stability):
    - Stop crashing with an assertion failure when parsing certain kinds
      of malformed or truncated microdescriptors. Fixes bug 16400;
      bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
      by "cypherpunks_backup".
    - Stop random client-side assertion failures that could occur when
      connecting to a busy hidden service, or connecting to a hidden
      service while a NEWNYM is in progress. Fixes bug 16013; bugfix
      on 0.1.0.1-rc.

  o Minor features (geoip):
    - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
    - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.

  o Minor bugfixes (crypto error-handling):
    - Check for failures from crypto_early_init, and refuse to continue.
      A previous typo meant that we could keep going with an
      uninitialized crypto library, and would have OpenSSL initialize
      its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
      when implementing ticket 4900. Patch by "teor".

  o Minor bugfixes (Linux seccomp2 sandbox):
    - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
      these when eventfd2() support is missing. Fixes bug 16363; bugfix
      on 0.2.6.3-alpha. Patch from "teor".

Revision 1.65: download - view: text, markup, annotated - select for diffs
Sun Jun 14 16:39:41 2015 UTC (9 years, 5 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2015Q2-base, pkgsrc-2015Q2
Diff to: previous 1.64: preferred, colored
Changes since revision 1.64: +4 -4 lines
Update to 0.2.6.9:

Changes in version 0.2.6.9 - 2015-06-11
  Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
  requirements for receiving an HSDir flag, and addresses some other small
  bugs in the systemd and sandbox code. Clients using circuit isolation
  should upgrade; all directory authorities should upgrade.

  o Major bugfixes (client-side privacy):
    - Properly separate out each SOCKSPort when applying stream
      isolation. The error occurred because each port's session group was
      being overwritten by a default value when the listener connection
      was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
      by "jojelino".

  o Minor feature (directory authorities, security):
    - The HSDir flag given by authorities now requires the Stable flag.
      For the current network, this results in going from 2887 to 2806
      HSDirs. Also, it makes it harder for an attacker to launch a sybil
      attack by raising the effort for a relay to become Stable which
      takes at the very least 7 days to do so and by keeping the 96
      hours uptime requirement for HSDir. Implements ticket 8243.

  o Minor bugfixes (compilation):
    - Build with --enable-systemd correctly when libsystemd is
      installed, but systemd is not. Fixes bug 16164; bugfix on
      0.2.6.3-alpha. Patch from Peter Palfrader.

  o Minor bugfixes (Linux seccomp2 sandbox):
    - Fix sandboxing to work when running as a relaymby renaming of
      secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
      bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
    - Allow systemd connections to work with the Linux seccomp2 sandbox
      code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
      Peter Palfrader.

  o Minor bugfixes (tests):
    - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
      16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".

Revision 1.64: download - view: text, markup, annotated - select for diffs
Sat May 23 08:53:11 2015 UTC (9 years, 6 months ago) by bsiegert
Branches: MAIN
Diff to: previous 1.63: preferred, colored
Changes since revision 1.63: +4 -4 lines
Update tor to 0.2.6.8. From Christian Sturm in PR pkg/49917.

Changes in version 0.2.6.8 - 2015-05-21
  Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
  fixes an authority-side bug in assigning the HSDir flag. All directory
  authorities should upgrade.

  o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
    - Revert commit that made directory authorities assign the HSDir
      flag to relay without a DirPort; this was bad because such relays
      can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
      on tor-0.2.6.3-alpha.

  o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
    - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
      a client authorized hidden service. Fixes bug 15823; bugfix
      on 0.2.1.6-alpha.

  o Minor features (geoip):
    - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
    - Update geoip6 to the April 8 2015 Maxmind GeoLite2
      Country database.


Changes in version 0.2.6.7 - 2015-04-06
  Tor 0.2.6.7 fixes two security issues that could be used by an
  attacker to crash hidden services, or crash clients visiting hidden
  services. Hidden services should upgrade as soon as possible; clients
  should upgrade whenever packages become available.

  This release also contains two simple improvements to make hidden
  services a bit less vulnerable to denial-of-service attacks.

  o Major bugfixes (security, hidden service):
    - Fix an issue that would allow a malicious client to trigger an
      assertion failure and halt a hidden service. Fixes bug 15600;
      bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
    - Fix a bug that could cause a client to crash with an assertion
      failure when parsing a malformed hidden service descriptor. Fixes
      bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".

  o Minor features (DoS-resistance, hidden service):
    - Introduction points no longer allow multiple INTRODUCE1 cells to
      arrive on the same circuit. This should make it more expensive for
      attackers to overwhelm hidden services with introductions.
      Resolves ticket 15515.
    - Decrease the amount of reattempts that a hidden service performs
      when its rendezvous circuits fail. This reduces the computational
      cost for running a hidden service under heavy load. Resolves
      ticket 11447.

Revision 1.62.2.1: download - view: text, markup, annotated - select for diffs
Wed Apr 8 20:53:25 2015 UTC (9 years, 7 months ago) by tron
Branches: pkgsrc-2015Q1
Diff to: previous 1.62: preferred, colored; next MAIN 1.63: preferred, colored
Changes since revision 1.62: +4 -4 lines
Pullup ticket #4657 - requested by wiz
net/tor: security update

Revisions pulled up:
- net/tor/Makefile                                              1.102
- net/tor/distinfo                                              1.63

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Wed Apr  8 05:26:02 UTC 2015

   Modified Files:
   	pkgsrc/net/tor: Makefile distinfo

   Log Message:
   Update to 0.2.5.12,  from Christian Sturm in PR 49823.

   Changes in version 0.2.5.12 - 2015-04-06
     Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
     could be used by an attacker to crash hidden services, or crash clients
     visiting hidden services. Hidden services should upgrade as soon as
     possible; clients should upgrade whenever packages become available.

     This release also backports a simple improvement to make hidden
     services a bit less vulnerable to denial-of-service attacks.

     o Major bugfixes (security, hidden service):
       - Fix an issue that would allow a malicious client to trigger an
         assertion failure and halt a hidden service. Fixes bug 15600;
         bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
       - Fix a bug that could cause a client to crash with an assertion
         failure when parsing a malformed hidden service descriptor. Fixes
         bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".

     o Minor features (DoS-resistance, hidden service):
       - Introduction points no longer allow multiple INTRODUCE1 cells to
         arrive on the same circuit. This should make it more expensive for
         attackers to overwhelm hidden services with introductions.
         Resolves ticket 15515.

Revision 1.63: download - view: text, markup, annotated - select for diffs
Wed Apr 8 05:26:02 2015 UTC (9 years, 7 months ago) by wiz
Branches: MAIN
Diff to: previous 1.62: preferred, colored
Changes since revision 1.62: +4 -4 lines
Update to 0.2.5.12,  from Christian Sturm in PR 49823.

Changes in version 0.2.5.12 - 2015-04-06
  Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
  could be used by an attacker to crash hidden services, or crash clients
  visiting hidden services. Hidden services should upgrade as soon as
  possible; clients should upgrade whenever packages become available.

  This release also backports a simple improvement to make hidden
  services a bit less vulnerable to denial-of-service attacks.

  o Major bugfixes (security, hidden service):
    - Fix an issue that would allow a malicious client to trigger an
      assertion failure and halt a hidden service. Fixes bug 15600;
      bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
    - Fix a bug that could cause a client to crash with an assertion
      failure when parsing a malformed hidden service descriptor. Fixes
      bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".

  o Minor features (DoS-resistance, hidden service):
    - Introduction points no longer allow multiple INTRODUCE1 cells to
      arrive on the same circuit. This should make it more expensive for
      attackers to overwhelm hidden services with introductions.
      Resolves ticket 15515.

Revision 1.62: download - view: text, markup, annotated - select for diffs
Fri Mar 27 12:41:17 2015 UTC (9 years, 8 months ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2015Q1-base
Branch point for: pkgsrc-2015Q1
Diff to: previous 1.61: preferred, colored
Changes since revision 1.61: +4 -4 lines
Update to 0.2.5.11, provided by Christian Sturm in PR 49794. Security update.

Changes in version 0.2.5.11 - 2015-03-17
  Tor 0.2.5.11 is the second stable release in the 0.2.5 series.

  It backports several bugfixes from the 0.2.6 branch, including a
  couple of medium-level security fixes for relays and exit nodes.
  It also updates the list of directory authorities.

  o Directory authority changes:
    - Remove turtles as a directory authority.
    - Add longclaw as a new (v3) directory authority. This implements
      ticket 13296. This keeps the directory authority count at 9.
    - The directory authority Faravahar has a new IP address. This
      closes ticket 14487.

  o Major bugfixes (crash, OSX, security):
    - Fix a remote denial-of-service opportunity caused by a bug in
      OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
      in OSX 10.9.

  o Major bugfixes (relay, stability, possible security):
    - Fix a bug that could lead to a relay crashing with an assertion
      failure if a buffer of exactly the wrong layout was passed to
      buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
      0.2.0.10-alpha. Patch from 'cypherpunks'.
    - Do not assert if the 'data' pointer on a buffer is advanced to the
      very end of the buffer; log a BUG message instead. Only assert if
      it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.

  o Major bugfixes (exit node stability):
    - Fix an assertion failure that could occur under high DNS load.
      Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
      diagnosed and fixed by "cypherpunks".

  o Major bugfixes (Linux seccomp2 sandbox):
    - Upon receiving sighup with the seccomp2 sandbox enabled, do not
      crash during attempts to call wait4. Fixes bug 15088; bugfix on
      0.2.5.1-alpha. Patch from "sanic".

  o Minor features (controller):
    - New "GETINFO bw-event-cache" to get information about recent
      bandwidth events. Closes ticket 14128. Useful for controllers to
      get recent bandwidth history after the fix for ticket 13988.

  o Minor features (geoip):
    - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
    - Update geoip6 to the March 3 2015 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (client, automapping):
    - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
      no value follows the option. Fixes bug 14142; bugfix on
      0.2.4.7-alpha. Patch by "teor".
    - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
      14195; bugfix on 0.1.0.1-rc.

  o Minor bugfixes (compilation):
    - Build without warnings with the stock OpenSSL srtp.h header, which
      has a duplicate declaration of SSL_get_selected_srtp_profile().
      Fixes bug 14220; this is OpenSSL's bug, not ours.

  o Minor bugfixes (directory authority):
    - Allow directory authorities to fetch more data from one another if
      they find themselves missing lots of votes. Previously, they had
      been bumping against the 10 MB queued data limit. Fixes bug 14261;
      bugfix on 0.1.2.5-alpha.
    - Enlarge the buffer to read bwauth generated files to avoid an
      issue when parsing the file in dirserv_read_measured_bandwidths().
      Fixes bug 14125; bugfix on 0.2.2.1-alpha.

  o Minor bugfixes (statistics):
    - Increase period over which bandwidth observations are aggregated
      from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.

  o Minor bugfixes (preventative security, C safety):
    - When reading a hexadecimal, base-32, or base-64 encoded value from
      a string, always overwrite the whole output buffer. This prevents
      some bugs where we would look at (but fortunately, not reveal)
      uninitialized memory on the stack. Fixes bug 14013; bugfix on all
      versions of Tor.

Revision 1.61: download - view: text, markup, annotated - select for diffs
Thu Nov 27 12:49:49 2014 UTC (10 years ago) by wiz
Branches: MAIN
CVS tags: pkgsrc-2014Q4-base, pkgsrc-2014Q4
Diff to: previous 1.60: preferred, colored
Changes since revision 1.60: +4 -4 lines
Update to 0.2.5.10.

Changes in version 0.2.5.10 - 2014-10-24
  Tor 0.2.5.10 is the first stable release in the 0.2.5 series.

  It adds several new security features, including improved
  denial-of-service resistance for relays, new compiler hardening
  options, and a system-call sandbox for hardened installations on Linux
  (requires seccomp2). The controller protocol has several new features,
  resolving IPv6 addresses should work better than before, and relays
  should be a little more CPU-efficient. We've added support for more
  OpenBSD and FreeBSD transparent proxy types. We've improved the build
  system and testing infrastructure to allow unit testing of more parts
  of the Tor codebase. Finally, we've addressed several nagging pluggable
  transport usability issues, and included numerous other small bugfixes
  and features mentioned below.

  This release marks end-of-life for Tor 0.2.3.x; those Tor versions
  have accumulated many known flaws; everyone should upgrade.

  o Deprecated versions:
    - Tor 0.2.3.x has reached end-of-life; it has received no patches or
      attention for some while.


Changes in version 0.2.5.9-rc - 2014-10-20
  Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
  series. It disables SSL3 in response to the recent "POODLE" attack
  (even though POODLE does not affect Tor). It also works around a crash
  bug caused by some operating systems' response to the "POODLE" attack
  (which does affect Tor). It also contains a few miscellaneous fixes.

  o Major security fixes:
    - Disable support for SSLv3. All versions of OpenSSL in use with Tor
      today support TLS 1.0 or later, so we can safely turn off support
      for this old (and insecure) protocol. Fixes bug 13426.

  o Major bugfixes (openssl bug workaround):
    - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
      1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
      13471. This is a workaround for an OpenSSL bug.

  o Minor bugfixes:
    - Disable the sandbox name resolver cache when running tor-resolve:
      tor-resolve doesn't use the sandbox code, and turning it on was
      breaking attempts to do tor-resolve on a non-default server on
      Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.

  o Compilation fixes:
    - Build and run correctly on systems like OpenBSD-current that have
      patched OpenSSL to remove get_cipher_by_char and/or its
      implementations. Fixes issue 13325.

  o Downgraded warnings:
    - Downgrade the severity of the 'unexpected sendme cell from client'
      from 'warn' to 'protocol warning'. Closes ticket 8093.


Changes in version 0.2.4.25 - 2014-10-20
  Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
  (even though POODLE does not affect Tor). It also works around a crash
  bug caused by some operating systems' response to the "POODLE" attack
  (which does affect Tor).

  o Major security fixes (also in 0.2.5.9-rc):
    - Disable support for SSLv3. All versions of OpenSSL in use with Tor
      today support TLS 1.0 or later, so we can safely turn off support
      for this old (and insecure) protocol. Fixes bug 13426.

  o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
    - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
      1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
      13471. This is a workaround for an OpenSSL bug.


Changes in version 0.2.5.8-rc - 2014-09-22
  Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
  series. It fixes a bug that affects consistency and speed when
  connecting to hidden services, and it updates the location of one of
  the directory authorities.

  o Major bugfixes:
    - Clients now send the correct address for their chosen rendezvous
      point when trying to access a hidden service. They used to send
      the wrong address, which would still work some of the time because
      they also sent the identity digest of the rendezvous point, and if
      the hidden service happened to try connecting to the rendezvous
      point from a relay that already had a connection open to it,
      the relay would reuse that connection. Now connections to hidden
      services should be more robust and faster. Also, this bug meant
      that clients were leaking to the hidden service whether they were
      on a little-endian (common) or big-endian (rare) system, which for
      some users might have reduced their anonymity. Fixes bug 13151;
      bugfix on 0.2.1.5-alpha.

  o Directory authority changes:
    - Change IP address for gabelmoo (v3 directory authority).


Changes in version 0.2.4.24 - 2014-09-22
  Tor 0.2.4.24 fixes a bug that affects consistency and speed when
  connecting to hidden services, and it updates the location of one of
  the directory authorities.

  o Major bugfixes:
    - Clients now send the correct address for their chosen rendezvous
      point when trying to access a hidden service. They used to send
      the wrong address, which would still work some of the time because
      they also sent the identity digest of the rendezvous point, and if
      the hidden service happened to try connecting to the rendezvous
      point from a relay that already had a connection open to it,
      the relay would reuse that connection. Now connections to hidden
      services should be more robust and faster. Also, this bug meant
      that clients were leaking to the hidden service whether they were
      on a little-endian (common) or big-endian (rare) system, which for
      some users might have reduced their anonymity. Fixes bug 13151;
      bugfix on 0.2.1.5-alpha.

  o Directory authority changes:
    - Change IP address for gabelmoo (v3 directory authority).

  o Minor features (geoip):
    - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
      Country database.


Changes in version 0.2.5.7-rc - 2014-09-11
  Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
  release series, and some long-standing bugs related to ORPort reachability
  testing and failure to send CREATE cells. It is the first release
  candidate for the Tor 0.2.5.x series.

  o Major bugfixes (client, startup):
    - Start making circuits as soon as DisabledNetwork is turned off.
      When Tor started with DisabledNetwork set, it would correctly
      conclude that it shouldn't build circuits, but it would mistakenly
      cache this conclusion, and continue believing it even when
      DisableNetwork is set to 0. Fixes the bug introduced by the fix
      for bug 11200; bugfix on 0.2.5.4-alpha.
    - Resume expanding abbreviations for command-line options. The fix
      for bug 4647 accidentally removed our hack from bug 586 that
      rewrote HashedControlPassword to __HashedControlSessionPassword
      when it appears on the commandline (which allowed the user to set
      her own HashedControlPassword in the torrc file while the
      controller generates a fresh session password for each run). Fixes
      bug 12948; bugfix on 0.2.5.1-alpha.
    - Warn about attempts to run hidden services and relays in the same
      process: that's probably not a good idea. Closes ticket 12908.

  o Major bugfixes (relay):
    - Avoid queuing or sending destroy cells for circuit ID zero when we
      fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
      Found and fixed by "cypherpunks".
    - Fix ORPort reachability detection on relays running behind a
      proxy, by correctly updating the "local" mark on the controlling
      channel when changing the address of an or_connection_t after the
      handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.

  o Minor features (bridge):
    - Add an ExtORPortCookieAuthFileGroupReadable option to make the
      cookie file for the ExtORPort g+r by default.

  o Minor features (geoip):
    - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (logging):
    - Reduce the log severity of the "Pluggable transport proxy does not
      provide any needed transports and will not be launched." message,
      since Tor Browser includes several ClientTransportPlugin lines in
      its torrc-defaults file, leading every Tor Browser user who looks
      at her logs to see these notices and wonder if they're dangerous.
      Resolves bug 13124; bugfix on 0.2.5.3-alpha.
    - Downgrade "Unexpected onionskin length after decryption" warning
      to a protocol-warn, since there's nothing relay operators can do
      about a client that sends them a malformed create cell. Resolves
      bug 12996; bugfix on 0.0.6rc1.
    - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
      cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
    - When logging information about an EXTEND2 or EXTENDED2 cell, log
      their names correctly. Fixes part of bug 12700; bugfix
      on 0.2.4.8-alpha.
    - When logging information about a relay cell whose command we don't
      recognize, log its command as an integer. Fixes part of bug 12700;
      bugfix on 0.2.1.10-alpha.
    - Escape all strings from the directory connection before logging
      them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".

  o Minor bugfixes (controller):
    - Restore the functionality of CookieAuthFileGroupReadable. Fixes
      bug 12864; bugfix on 0.2.5.1-alpha.
    - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
      controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
      by "teor".

  o Minor bugfixes (compilation):
    - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
      bugfix on 0.2.5.5-alpha.
    - Make the nmake make files work again. Fixes bug 13081. Bugfix on
      0.2.5.1-alpha. Patch from "NewEraCracker".
    - In routerlist_assert_ok(), don't take the address of a
      routerinfo's cache_info member unless that routerinfo is non-NULL.
      Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
    - Fix a large number of false positive warnings from the clang
      analyzer static analysis tool. This should make real warnings
      easier for clang analyzer to find. Patch from "teor". Closes
      ticket 13036.

  o Distribution (systemd):
    - Verify configuration file via ExecStartPre in the systemd unit
      file. Patch from intrigeri; resolves ticket 12730.
    - Explicitly disable RunAsDaemon in the systemd unit file. Our
      current systemd unit uses "Type = simple", so systemd does not
      expect tor to fork. If the user has "RunAsDaemon 1" in their
      torrc, then things won't work as expected. This is e.g. the case
      on Debian (and derivatives), since there we pass "--defaults-torrc
      /usr/share/tor/tor-service-defaults-torrc" (that contains
      "RunAsDaemon 1") by default. Patch by intrigeri; resolves
      ticket 12731.

  o Documentation:
    - Adjust the URLs in the README to refer to the new locations of
      several documents on the website. Fixes bug 12830. Patch from
      Matt Pagan.
    - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
      ticket 12878.


Changes in version 0.2.5.6-alpha - 2014-07-28
  Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
  risk from guard rotation, and fixes a variety of other issues to get
  us closer to a release candidate.

  o Major features (also in 0.2.4.23):
    - Make the number of entry guards configurable via a new
      NumEntryGuards consensus parameter, and the number of directory
      guards configurable via a new NumDirectoryGuards consensus
      parameter. Implements ticket 12688.

  o Major bugfixes (also in 0.2.4.23):
    - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
      implementation that caused incorrect results on 32-bit
      implementations when certain malformed inputs were used along with
      a small class of private ntor keys. This bug does not currently
      appear to allow an attacker to learn private keys or impersonate a
      Tor server, but it could provide a means to distinguish 32-bit Tor
      implementations from 64-bit Tor implementations. Fixes bug 12694;
      bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
      Adam Langley.

  o Major bugfixes:
    - Perform circuit cleanup operations even when circuit
      construction operations are disabled (because the network is
      disabled, or because there isn't enough directory information).
      Previously, when we were not building predictive circuits, we
      were not closing expired circuits either. Fixes bug 8387; bugfix on
      0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
      became more strict about when we have "enough directory information
      to build circuits".

  o Minor features:
    - Authorities now assign the Guard flag to the fastest 25% of the
      network (it used to be the fastest 50%). Also raise the consensus
      weight that guarantees the Guard flag from 250 to 2000. For the
      current network, this results in about 1100 guards, down from 2500.
      This step paves the way for moving the number of entry guards
      down to 1 (proposal 236) while still providing reasonable expected
      performance for most users. Implements ticket 12690.
    - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
      Country database.
    - Slightly enhance the diagnostic message for bug 12184.

  o Minor bugfixes (also in 0.2.4.23):
    - Warn and drop the circuit if we receive an inbound 'relay early'
      cell. Those used to be normal to receive on hidden service circuits
      due to bug 1038, but the buggy Tor versions are long gone from
      the network so we can afford to resume watching for them. Resolves
      the rest of bug 1038; bugfix on 0.2.1.19.
    - Correct a confusing error message when trying to extend a circuit
      via the control protocol but we don't know a descriptor or
      microdescriptor for one of the specified relays. Fixes bug 12718;
      bugfix on 0.2.3.1-alpha.

  o Minor bugfixes:
    - Fix compilation when building with bufferevents enabled. (This
      configuration is still not expected to work, however.)
      Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
      0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
      Gunasekaran.
    - Compile correctly with builds and forks of OpenSSL (such as
      LibreSSL) that disable compression. Fixes bug 12602; bugfix on
      0.2.1.1-alpha. Patch from "dhill".


Changes in version 0.2.4.23 - 2014-07-28
  Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
  guard rotation, and also backports several important fixes from the
  Tor 0.2.5 alpha release series.

  o Major features:
    - Clients now look at the "usecreatefast" consensus parameter to
      decide whether to use CREATE_FAST or CREATE cells for the first hop
      of their circuit. This approach can improve security on connections
      where Tor's circuit handshake is stronger than the available TLS
      connection security levels, but the tradeoff is more computational
      load on guard relays. Implements proposal 221. Resolves ticket 9386.
    - Make the number of entry guards configurable via a new
      NumEntryGuards consensus parameter, and the number of directory
      guards configurable via a new NumDirectoryGuards consensus
      parameter. Implements ticket 12688.

  o Major bugfixes:
    - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
      implementation that caused incorrect results on 32-bit
      implementations when certain malformed inputs were used along with
      a small class of private ntor keys. This bug does not currently
      appear to allow an attacker to learn private keys or impersonate a
      Tor server, but it could provide a means to distinguish 32-bit Tor
      implementations from 64-bit Tor implementations. Fixes bug 12694;
      bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
      Adam Langley.

  o Minor bugfixes:
    - Warn and drop the circuit if we receive an inbound 'relay early'
      cell. Those used to be normal to receive on hidden service circuits
      due to bug 1038, but the buggy Tor versions are long gone from
      the network so we can afford to resume watching for them. Resolves
      the rest of bug 1038; bugfix on 0.2.1.19.
    - Correct a confusing error message when trying to extend a circuit
      via the control protocol but we don't know a descriptor or
      microdescriptor for one of the specified relays. Fixes bug 12718;
      bugfix on 0.2.3.1-alpha.
    - Avoid an illegal read from stack when initializing the TLS
      module using a version of OpenSSL without all of the ciphers
      used by the v2 link handshake. Fixes bug 12227; bugfix on
      0.2.4.8-alpha.  Found by "starlight".

  o Minor features:
    - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
      Country database.


Changes in version 0.2.5.5-alpha - 2014-06-18
  Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
  0.2.5.x release series, including a couple of DoS issues, some
  performance regressions, a large number of bugs affecting the Linux
  seccomp2 sandbox code, and various other bugfixes. It also adds
  diagnostic bugfixes for a few tricky issues that we're trying to
  track down.

  o Major features (security, traffic analysis resistance):
    - Several major improvements to the algorithm used to decide when to
      close TLS connections. Previous versions of Tor closed connections
      at a fixed interval after the last time a non-padding cell was
      sent over the connection, regardless of the target of the
      connection. Now, we randomize the intervals by adding up to 50% of
      their base value, we measure the length of time since connection
      last had at least one circuit, and we allow connections to known
      ORs to remain open a little longer (15 minutes instead of 3
      minutes minimum). These changes should improve Tor's resistance
      against some kinds of traffic analysis, and lower some overhead
      from needlessly closed connections. Fixes ticket 6799.
      Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.

  o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
    - Fix a memory leak that could occur if a microdescriptor parse
      fails during the tokenizing step. This bug could enable a memory
      exhaustion attack by directory servers. Fixes bug 11649; bugfix
      on 0.2.2.6-alpha.

  o Major bugfixes (security, directory authorities):
    - Directory authorities now include a digest of each relay's
      identity key as a part of its microdescriptor.

      This is a workaround for bug 11743 (reported by "cypherpunks"),
      where Tor clients do not support receiving multiple
      microdescriptors with the same SHA256 digest in the same
      consensus. When clients receive a consensus like this, they only
      use one of the relays. Without this fix, a hostile relay could
      selectively disable some client use of target relays by
      constructing a router descriptor with a different identity and the
      same microdescriptor parameters and getting the authorities to
      list it in a microdescriptor consensus. This fix prevents an
      attacker from causing a microdescriptor collision, because the
      router's identity is not forgeable.

  o Major bugfixes (relay):
    - Use a direct dirport connection when uploading non-anonymous
      descriptors to the directory authorities. Previously, relays would
      incorrectly use tunnel connections under a fairly wide variety of
      circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
    - When a circuit accidentally has the same circuit ID for its
      forward and reverse direction, correctly detect the direction of
      cells using that circuit. Previously, this bug made roughly one
      circuit in a million non-functional. Fixes bug 12195; this is a
      bugfix on every version of Tor.

  o Major bugfixes (client, pluggable transports):
    - When managing pluggable transports, use OS notification facilities
      to learn if they have crashed, and don't attempt to kill any
      process that has already exited. Fixes bug 8746; bugfix
      on 0.2.3.6-alpha.

  o Minor features (diagnostic):
    - When logging a warning because of bug 7164, additionally check the
      hash table for consistency (as proposed on ticket 11737). This may
      help diagnose bug 7164.
    - When we log a heartbeat, log how many one-hop circuits we have
      that are at least 30 minutes old, and log status information about
      a few of them. This is an attempt to track down bug 8387.
    - When encountering an unexpected CR while writing text to a file on
      Windows, log the name of the file. Should help diagnosing
      bug 11233.
    - Give more specific warnings when a client notices that an onion
      handshake has failed. Fixes ticket 9635.
    - Add significant new logging code to attempt to diagnose bug 12184,
      where relays seem to run out of available circuit IDs.
    - Improve the diagnostic log message for bug 8387 even further to
      try to improve our odds of figuring out why one-hop directory
      circuits sometimes do not get closed.

  o Minor features (security, memory management):
    - Memory allocation tricks (mempools and buffer freelists) are now
      disabled by default. You can turn them back on with
      --enable-mempools and --enable-buf-freelists respectively. We're
      disabling these features because malloc performance is good enough
      on most platforms, and a similar feature in OpenSSL exacerbated
      exploitation of the Heartbleed attack. Resolves ticket 11476.

  o Minor features (security):
    - Apply the secure SipHash-2-4 function to the hash table mapping
      circuit IDs and channels to circuits. We missed this one when we
      were converting all the other hash functions to use SipHash back
      in 0.2.5.3-alpha. Resolves ticket 11750.

  o Minor features (build):
    - The configure script has a --disable-seccomp option to turn off
      support for libseccomp on systems that have it, in case it (or
      Tor's use of it) is broken. Resolves ticket 11628.

  o Minor features (other):
    - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
    - When running a hidden service, do not allow TunneledDirConns 0;
      this will keep the hidden service from running, and also
      make it publish its descriptors directly over HTTP. Fixes bug 10849;
      bugfix on 0.2.1.1-alpha.

  o Minor bugfixes (performance):
    - Avoid a bug where every successful connection made us recompute
      the flag telling us whether we have sufficient information to
      build circuits. Previously, we would forget our cached value
      whenever we successfully opened a channel (or marked a router as
      running or not running for any other reason), regardless of
      whether we had previously believed the router to be running. This
      forced us to run an expensive update operation far too often.
      Fixes bug 12170; bugfix on 0.1.2.1-alpha.
    - Avoid using tor_memeq() for checking relay cell integrity. This
      removes a possible performance bottleneck. Fixes part of bug
      12169; bugfix on 0.2.1.31.

  o Minor bugfixes (compilation):
    - Fix compilation of test_status.c when building with MVSC. Bugfix
      on 0.2.5.4-alpha. Patch from Gisle Vanem.
    - Resolve GCC complaints on OpenBSD about discarding constness in
      TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
      on 0.1.1.23. Patch from Dana Koch.
    - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
      treatment of long and time_t as comparable types. Fixes part of
      bug 11633. Patch from Dana Koch.
    - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
      11623; bugfix on 0.2.5.3-alpha.
    - When deciding whether to build the 64-bit curve25519
      implementation, detect platforms where we can compile 128-bit
      arithmetic but cannot link it. Fixes bug 11729; bugfix on
      0.2.4.8-alpha. Patch from "conradev".
    - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
      bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
    - Fix compilation with dmalloc. Fixes bug 11605; bugfix
      on 0.2.4.10-alpha.

  o Minor bugfixes (Directory server):
    - When sending a compressed set of descriptors or microdescriptors,
      make sure to finalize the zlib stream. Previously, we would write
      all the compressed data, but if the last descriptor we wanted to
      send was missing or too old, we would not mark the stream as
      finished. This caused problems for decompression tools. Fixes bug
      11648; bugfix on 0.1.1.23.

  o Minor bugfixes (Linux seccomp sandbox):
    - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
      11622; bugfix on 0.2.5.1-alpha.
    - Avoid crashing when re-opening listener ports with the seccomp
      sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
    - Avoid crashing with the seccomp sandbox enabled along with
      ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
    - When we receive a SIGHUP with the sandbox enabled, correctly
      support rotating our log files. Fixes bug 12032; bugfix
      on 0.2.5.1-alpha.
    - Avoid crash when running with sandboxing enabled and
      DirReqStatistics not disabled. Fixes bug 12035; bugfix
      on 0.2.5.1-alpha.
    - Fix a "BUG" warning when trying to write bridge-stats files with
      the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
      on 0.2.5.1-alpha.
    - Prevent the sandbox from crashing on startup when run with the
      --enable-expensive-hardening configuration option. Fixes bug
      11477; bugfix on 0.2.5.4-alpha.
    - When running with DirPortFrontPage and sandboxing both enabled,
      reload the DirPortFrontPage correctly when restarting. Fixes bug
      12028; bugfix on 0.2.5.1-alpha.
    - Don't try to enable the sandbox when using the Tor binary to check
      its configuration, hash a passphrase, or so on. Doing so was
      crashing on startup for some users. Fixes bug 11609; bugfix
      on 0.2.5.1-alpha.
    - Avoid warnings when running with sandboxing and node statistics
      enabled at the same time. Fixes part of 12064; bugfix on
      0.2.5.1-alpha. Patch from Michael Wolf.
    - Avoid warnings when running with sandboxing enabled at the same
      time as cookie authentication, hidden services, or directory
      authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
    - Do not allow options that require calls to exec to be enabled
      alongside the seccomp2 sandbox: they will inevitably crash. Fixes
      bug 12043; bugfix on 0.2.5.1-alpha.
    - Handle failures in getpwnam()/getpwuid() when running with the
      User option set and the Linux syscall sandbox enabled. Fixes bug
      11946; bugfix on 0.2.5.1-alpha.
    - Refactor the getaddrinfo workaround that the seccomp sandbox uses
      to avoid calling getaddrinfo() after installing the sandbox
      filters. Previously, it preloaded a cache with the IPv4 address
      for our hostname, and nothing else. Now, it loads the cache with
      every address that it used to initialize the Tor process. Fixes
      bug 11970; bugfix on 0.2.5.1-alpha.

  o Minor bugfixes (pluggable transports):
    - Enable the ExtORPortCookieAuthFile option, to allow changing the
      default location of the authentication token for the extended OR
      Port as used by sever-side pluggable transports. We had
      implemented this option before, but the code to make it settable
      had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
    - Avoid another 60-second delay when starting Tor in a pluggable-
      transport-using configuration when we already have cached
      descriptors for our bridges. Fixes bug 11965; bugfix
      on 0.2.3.6-alpha.

  o Minor bugfixes (client):
    - Avoid "Tried to open a socket with DisableNetwork set" warnings
      when starting a client with bridges configured and DisableNetwork
      set. (Tor launcher starts Tor with DisableNetwork set the first
      time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.

  o Minor bugfixes (testing):
    - The Python parts of the test scripts now work on Python 3 as well
      as Python 2, so systems where '/usr/bin/python' is Python 3 will
      no longer have the tests break. Fixes bug 11608; bugfix
      on 0.2.5.2-alpha.
    - When looking for versions of python that we could run the tests
      with, check for "python2.7" and "python3.3"; previously we were
      only looking for "python", "python2", and "python3". Patch from
      Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
    - Fix all valgrind warnings produced by the unit tests. There were
      over a thousand memory leak warnings previously, mostly produced
      by forgetting to free things in the unit test code. Fixes bug
      11618, bugfixes on many versions of Tor.

  o Minor bugfixes (tor-fw-helper):
    - Give a correct log message when tor-fw-helper fails to launch.
      (Previously, we would say something like "tor-fw-helper sent us a
      string we could not parse".) Fixes bug 9781; bugfix
      on 0.2.4.2-alpha.

  o Minor bugfixes (relay, threading):
    - Check return code on spawn_func() in cpuworker code, so that we
      don't think we've spawned a nonworking cpuworker and write junk to
      it forever. Fix related to bug 4345; bugfix on all released Tor
      versions. Found by "skruffy".
    - Use a pthread_attr to make sure that spawn_func() cannot return an
      error while at the same time launching a thread. Fix related to
      bug 4345; bugfix on all released Tor versions. Reported
      by "cypherpunks".

  o Minor bugfixes (relay, oom prevention):
    - Correctly detect the total available system memory. We tried to do
      this in 0.2.5.4-alpha, but the code was set up to always return an
      error value, even on success. Fixes bug 11805; bugfix
      on 0.2.5.4-alpha.

  o Minor bugfixes (relay, other):
    - We now drop CREATE cells for already-existent circuit IDs and for
      zero-valued circuit IDs, regardless of other factors that might
      otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
      on 0.0.8pre1.
    - Avoid an illegal read from stack when initializing the TLS module
      using a version of OpenSSL without all of the ciphers used by the
      v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
      by "starlight".
    - When rejecting DATA cells for stream_id zero, still count them
      against the circuit's deliver window so that we don't fail to send
      a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.

  o Minor bugfixes (logging):
    - Fix a misformatted log message about delayed directory fetches.
      Fixes bug 11654; bugfix on 0.2.5.3-alpha.
    - Squelch a spurious LD_BUG message "No origin circuit for
      successful SOCKS stream" in certain hidden service failure cases;
      fixes bug 10616.

  o Distribution:
    - Include a tor.service file in contrib/dist for use with systemd.
      Some distributions will be able to use this file unmodified;
      others will need to tweak it, or write their own. Patch from Jamie
      Nguyen; resolves ticket 8368.

  o Documentation:
    - Clean up several option names in the manpage to match their real
      names, add the missing documentation for a couple of testing and
      directory authority options, remove the documentation for a
      V2-directory fetching option that no longer exists. Resolves
      ticket 11634.
    - Correct the documenation so that it lists the correct directory
      for the stats files. (They are in a subdirectory called "stats",
      not "status".)
    - In the manpage, move more authority-only options into the
      directory authority section so that operators of regular directory
      caches don't get confused.

  o Package cleanup:
    - The contrib directory has been sorted and tidied. Before, it was
      an unsorted dumping ground for useful and not-so-useful things.
      Now, it is divided based on functionality, and the items which
      seemed to be nonfunctional or useless have been removed. Resolves
      ticket 8966; based on patches from "rl1987".

  o Removed code:
    - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
      and MTBF calculations, but that nobody was using. Fixes #11742.
    - The TunnelDirConns and PreferTunnelledDirConns options no longer
      exist; tunneled directory connections have been available since
      0.1.2.5-alpha, and turning them off is not a good idea. This is a
      brute-force fix for 10849, where "TunnelDirConns 0" would break
      hidden services.


Changes in version 0.2.4.22 - 2014-05-16
  Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
  alpha release series. These include blocking all authority signing
  keys that may have been affected by the OpenSSL "heartbleed" bug,
  choosing a far more secure set of TLS ciphersuites by default, closing
  a couple of memory leaks that could be used to run a target relay out
  of RAM, and several others.

  o Major features (security, backport from 0.2.5.4-alpha):
    - Block authority signing keys that were used on authorities
      vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
      don't have any evidence that these keys _were_ compromised; we're
      doing this to be prudent.) Resolves ticket 11464.

  o Major bugfixes (security, OOM):
    - Fix a memory leak that could occur if a microdescriptor parse
      fails during the tokenizing step. This bug could enable a memory
      exhaustion attack by directory servers. Fixes bug 11649; bugfix
      on 0.2.2.6-alpha.

  o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
    - The relay ciphersuite list is now generated automatically based on
      uniform criteria, and includes all OpenSSL ciphersuites with
      acceptable strength and forward secrecy. Previously, we had left
      some perfectly fine ciphersuites unsupported due to omission or
      typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
      'cypherpunks'. Bugfix on 0.2.4.8-alpha.
    - Relays now trust themselves to have a better view than clients of
      which TLS ciphersuites are better than others. (Thanks to bug
      11513, the relay list is now well-considered, whereas the client
      list has been chosen mainly for anti-fingerprinting purposes.)
      Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
      CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
      AES128. Resolves ticket 11528.
    - Clients now try to advertise the same list of ciphersuites as
      Firefox 28. This change enables selection of (fast) GCM
      ciphersuites, disables some strange old ciphers, and stops
      advertising the ECDH (not to be confused with ECDHE) ciphersuites.
      Resolves ticket 11438.

  o Minor bugfixes (configuration, security):
    - When running a hidden service, do not allow TunneledDirConns 0:
      trying to set that option together with a hidden service would
      otherwise prevent the hidden service from running, and also make
      it publish its descriptors directly over HTTP. Fixes bug 10849;
      bugfix on 0.2.1.1-alpha.

  o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
    - Avoid sending a garbage value to the controller when a circuit is
      cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.

  o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
    - Stop leaking memory when we successfully resolve a PTR record.
      Fixes bug 11437; bugfix on 0.2.4.7-alpha.

  o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
    - Avoid 60-second delays in the bootstrapping process when Tor is
      launching for a second time while using bridges. Fixes bug 9229;
      bugfix on 0.2.0.3-alpha.

  o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
    - Give the correct URL in the warning message when trying to run a
      relay on an ancient version of Windows. Fixes bug 9393.

  o Minor bugfixes (compilation):
    - Fix a compilation error when compiling with --disable-curve25519.
      Fixes bug 9700; bugfix on 0.2.4.17-rc.

  o Minor bugfixes:
    - Downgrade the warning severity for the the "md was still
      referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
      for trying to diagnose this bug, and the current warning in
      earlier versions of tor achieves nothing useful. Addresses warning
      from bug 7164.

  o Minor features (log verbosity, backport from 0.2.5.4-alpha):
    - When we run out of usable circuit IDs on a channel, log only one
      warning for the whole channel, and describe how many circuits
      there were on the channel. Fixes part of ticket 11553.

  o Minor features (security, backport from 0.2.5.4-alpha):
    - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
      leave the default at 8GBytes), to better support Raspberry Pi
      users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.

  o Documentation (backport from 0.2.5.4-alpha):
    - Correctly document that we search for a system torrc file before
      looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
      0.2.3.18-rc.


Changes in version 0.2.5.4-alpha - 2014-04-25
  Tor 0.2.5.4-alpha includes several security and performance
  improvements for clients and relays, including blacklisting authority
  signing keys that were used while susceptible to the OpenSSL
  "heartbleed" bug, fixing two expensive functions on busy relays,
  improved TLS ciphersuite preference lists, support for run-time
  hardening on compilers that support AddressSanitizer, and more work on
  the Linux sandbox code.

  There are also several usability fixes for clients (especially clients
  that use bridges), two new TransPort protocols supported (one on
  OpenBSD, one on FreeBSD), and various other bugfixes.

  This release marks end-of-life for Tor 0.2.2.x; those Tor versions
  have accumulated many known flaws; everyone should upgrade.

  o Major features (security):
    - If you don't specify MaxMemInQueues yourself, Tor now tries to
      pick a good value based on your total system memory. Previously,
      the default was always 8 GB. You can still override the default by
      setting MaxMemInQueues yourself. Resolves ticket 11396.
    - Block authority signing keys that were used on authorities
      vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
      don't have any evidence that these keys _were_ compromised; we're
      doing this to be prudent.) Resolves ticket 11464.

  o Major features (relay performance):
    - Speed up server-side lookups of rendezvous and introduction point
      circuits by using hashtables instead of linear searches. These
      functions previously accounted between 3 and 7% of CPU usage on
      some busy relays. Resolves ticket 9841.
    - Avoid wasting CPU when extending a circuit over a channel that is
      nearly out of circuit IDs. Previously, we would do a linear scan
      over possible circuit IDs before finding one or deciding that we
      had exhausted our possibilities. Now, we try at most 64 random
      circuit IDs before deciding that we probably won't succeed. Fixes
      a possible root cause of ticket 11553.

  o Major features (seccomp2 sandbox, Linux only):
    - The seccomp2 sandbox can now run a test network for multiple hours
      without crashing. The sandbox is still experimental, and more bugs
      will probably turn up. To try it, enable "Sandbox 1" on a Linux
      host. Resolves ticket 11351.
    - Strengthen sandbox code: the sandbox can now test the arguments
      for rename(), and blocks _sysctl() entirely. Resolves another part
      of ticket 11351.
    - When the sandbox blocks a system call, it now tries to log a stack
      trace before exiting. Resolves ticket 11465.

  o Major bugfixes (TLS cipher selection):
    - The relay ciphersuite list is now generated automatically based on
      uniform criteria, and includes all OpenSSL ciphersuites with
      acceptable strength and forward secrecy. Previously, we had left
      some perfectly fine ciphersuites unsupported due to omission or
      typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
      'cypherpunks'. Bugfix on 0.2.4.8-alpha.
    - Relays now trust themselves to have a better view than clients of
      which TLS ciphersuites are better than others. (Thanks to bug
      11513, the relay list is now well-considered, whereas the client
      list has been chosen mainly for anti-fingerprinting purposes.)
      Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
      CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
      AES128. Resolves ticket 11528.
    - Clients now try to advertise the same list of ciphersuites as
      Firefox 28. This change enables selection of (fast) GCM
      ciphersuites, disables some strange old ciphers, and stops
      advertising the ECDH (not to be confused with ECDHE) ciphersuites.
      Resolves ticket 11438.

  o Major bugfixes (bridge client):
    - Avoid 60-second delays in the bootstrapping process when Tor is
      launching for a second time while using bridges. Fixes bug 9229;
      bugfix on 0.2.0.3-alpha.

  o Minor features (transparent proxy, *BSD):
    - Support FreeBSD's ipfw firewall interface for TransPort ports on
      FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
      10267; patch from "yurivict".
    - Support OpenBSD's divert-to rules with the pf firewall for
      transparent proxy ports. To enable it, set "TransProxyType
      pf-divert". This allows Tor to run a TransPort transparent proxy
      port on OpenBSD 4.4 or later without root privileges. See the
      pf.conf(5) manual page for information on configuring pf to use
      divert-to rules. Closes ticket 10896; patch from Dana Koch.

  o Minor features (security):
    - New --enable-expensive-hardening option to enable security
      hardening options that consume nontrivial amounts of CPU and
      memory. Right now, this includes AddressSanitizer and UbSan, which
      are supported in newer versions of GCC and Clang. Closes ticket
      11477.

  o Minor features (log verbosity):
    - Demote the message that we give when a flushing connection times
      out for too long from NOTICE to INFO. It was usually meaningless.
      Resolves ticket 5286.
    - Don't log so many notice-level bootstrapping messages at startup
      about downloading descriptors. Previously, we'd log a notice
      whenever we learned about more routers. Now, we only log a notice
      at every 5% of progress. Fixes bug 9963.
    - Warn less verbosely when receiving a malformed
      ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
    - When we run out of usable circuit IDs on a channel, log only one
      warning for the whole channel, and describe how many circuits
      there were on the channel. Fixes part of ticket 11553.

  o Minor features (relay):
    - If a circuit timed out for at least 3 minutes, check if we have a
      new external IP address, and publish a new descriptor with the new
      IP address if it changed. Resolves ticket 2454.

  o Minor features (controller):
    - Make the entire exit policy available from the control port via
      GETINFO exit-policy/*. Implements enhancement 7952. Patch from
      "rl1987".
    - Because of the fix for ticket 11396, the real limit for memory
      usage may no longer match the configured MaxMemInQueues value. The
      real limit is now exposed via GETINFO limits/max-mem-in-queues.

  o Minor features (bridge client):
    - Report a more useful failure message when we can't connect to a
      bridge because we don't have the right pluggable transport
      configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.

  o Minor features (diagnostic):
    - Add more log messages to diagnose bug 7164, which causes
      intermittent "microdesc_free() called but md was still referenced"
      warnings. We now include more information, to figure out why we
      might be cleaning a microdescriptor for being too old if it's
      still referenced by a live node_t object.

  o Minor bugfixes (client, DNSPort):
    - When using DNSPort, try to respond to AAAA requests with AAAA
      answers. Previously, we hadn't looked at the request type when
      deciding which answer type to prefer. Fixes bug 10468; bugfix on
      0.2.4.7-alpha.
    - When receiving a DNS query for an unsupported record type, reply
      with no answer rather than with a NOTIMPL error. This behavior
      isn't correct either, but it will break fewer client programs, we
      hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
      from "epoch".

  o Minor bugfixes (exit relay):
    - Stop leaking memory when we successfully resolve a PTR record.
      Fixes bug 11437; bugfix on 0.2.4.7-alpha.

  o Minor bugfixes (bridge client):
    - Stop accepting bridge lines containing hostnames. Doing so would
      cause clients to perform DNS requests on the hostnames, which was
      not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
    - Avoid a 60-second delay in the bootstrapping process when a Tor
      client with pluggable transports re-reads its configuration at
      just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.

  o Minor bugfixes (client, logging during bootstrap):
    - Warn only once if we start logging in an unsafe way. Previously,
      we complain as many times as we had problems. Fixes bug 9870;
      bugfix on 0.2.5.1-alpha.
    - Only report the first fatal bootstrap error on a given OR
      connection. This stops us from telling the controller bogus error
      messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
    - Be more helpful when trying to run sandboxed on Linux without
      libseccomp. Instead of saying "Sandbox is not implemented on this
      platform", we now explain that we need to be built with
      libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
    - Avoid generating spurious warnings when starting with
      DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
      0.2.3.9-alpha.

  o Minor bugfixes (closing OR connections):
    - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
      check if it's an or_connection_t and correctly call
      connection_or_close_for_error() rather than
      connection_mark_for_close() directly. Fixes bug 11304; bugfix on
      0.2.4.4-alpha.
    - When closing all connections on setting DisableNetwork to 1, use
      connection_or_close_normally() rather than closing OR connections
      out from under the channel layer. Fixes bug 11306; bugfix on
      0.2.4.4-alpha.

  o Minor bugfixes (controller):
    - Avoid sending a garbage value to the controller when a circuit is
      cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.

  o Minor bugfixes (tor-fw-helper):
    - Allow tor-fw-helper to build again by adding src/ext to its
      CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.

  o Minor bugfixes (bridges):
    - Avoid potential crashes or bad behavior when launching a
      server-side managed proxy with ORPort or ExtORPort temporarily
      disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.

  o Minor bugfixes (platform-specific):
    - Fix compilation on Solaris, which does not have <endian.h>. Fixes
      bug 11426; bugfix on 0.2.5.3-alpha.
    - When dumping a malformed directory object to disk, save it in
      binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
      0.2.2.1-alpha.
    - Don't report failures from make_socket_reuseable() on incoming
      sockets on OSX: this can happen when incoming connections close
      early. Fixes bug 10081.

  o Minor bugfixes (trivial memory leaks):
    - Fix a small memory leak when signing a directory object. Fixes bug
      11275; bugfix on 0.2.4.13-alpha.
    - Free placeholder entries in our circuit table at exit; fixes a
      harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
    - Don't re-initialize a second set of OpenSSL mutexes when starting
      up. Previously, we'd make one set of mutexes, and then immediately
      replace them with another. Fixes bug 11726; bugfix on
      0.2.5.3-alpha.
    - Resolve some memory leaks found by coverity in the unit tests, on
      exit in tor-gencert, and on a failure to compute digests for our
      own keys when generating a v3 networkstatus vote. These leaks
      should never have affected anyone in practice.

  o Minor bugfixes (hidden service):
    - Only retry attempts to connect to a chosen rendezvous point 8
      times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.

  o Minor bugfixes (misc code correctness):
    - Fix various instances of undefined behavior in channeltls.c,
      tor_memmem(), and eventdns.c that would cause us to construct
      pointers to memory outside an allocated object. (These invalid
      pointers were not accessed, but C does not even allow them to
      exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
      0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
    - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
      fix some miscellaneous errors in our tests and codebase. Fixes bug
      11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
    - Always check return values for unlink, munmap, UnmapViewOfFile;
      check strftime return values more often. In some cases all we can
      do is report a warning, but this may help prevent deeper bugs from
      going unnoticed. Closes ticket 8787; bugfixes on many, many tor
      versions.
    - Fix numerous warnings from the clang "scan-build" static analyzer.
      Some of these are programming style issues; some of them are false
      positives that indicated awkward code; some are undefined behavior
      cases related to constructing (but not using) invalid pointers;
      some are assumptions about API behavior; some are (harmlessly)
      logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
      correct; and one or two are genuine bugs that weren't reachable
      from the rest of the program. Fixes bug 8793; bugfixes on many,
      many tor versions.

  o Documentation:
    - Build the torify.1 manpage again. Previously, we were only trying
      to build it when also building tor-fw-helper. That's why we didn't
      notice that we'd broken the ability to build it. Fixes bug 11321;
      bugfix on 0.2.5.1-alpha.
    - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
      11061; bugfix on 0.2.4.7-alpha.
    - Correctly document that we search for a system torrc file before
      looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
      0.2.3.18-rc.
    - Resolve warnings from Doxygen.

  o Code simplifications and refactoring:
    - Remove is_internal_IP() function. Resolves ticket 4645.
    - Remove unused function circuit_dump_by_chan from circuitlist.c.
      Closes issue 9107; patch from "marek".
    - Change our use of the ENUM_BF macro to avoid declarations that
      confuse Doxygen.

  o Deprecated versions:
    - Tor 0.2.2.x has reached end-of-life; it has received no patches or
      attention for some while. Directory authorities no longer accept
      descriptors from relays running any version of Tor prior to Tor
      0.2.3.16-alpha. Resolves ticket 11149.

  o Testing:
    - New macros in test.h to simplify writing mock-functions for unit
      tests. Part of ticket 11507. Patch from Dana Koch.
    - Complete tests for the status.c module. Resolves ticket 11507.
      Patch from Dana Koch.

  o Removed code:
    - Remove all code for the long unused v1 directory protocol.
      Resolves ticket 11070.


Changes in version 0.2.5.3-alpha - 2014-03-22
  Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
  two new anti-DoS features for Tor relays, resolves a bug that kept
  SOCKS5 support for IPv6 from working, fixes several annoying usability
  issues for bridge users, and removes more old code for unused
  directory formats.

  The Tor 0.2.5.x release series is now in patch-freeze: no feature
  patches not already written will be considered for inclusion in 0.2.5.x.

  o Major features (relay security, DoS-resistance):
    - When deciding whether we have run out of memory and we need to
      close circuits, also consider memory allocated in buffers for
      streams attached to each circuit.

      This change, which extends an anti-DoS feature introduced in
      0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
      better resist more memory-based DoS attacks than before. Since the
      MaxMemInCellQueues option now applies to all queues, it is renamed
      to MaxMemInQueues. This feature fixes bug 10169.
    - Avoid hash-flooding denial-of-service attacks by using the secure
      SipHash-2-4 hash function for our hashtables. Without this
      feature, an attacker could degrade performance of a targeted
      client or server by flooding their data structures with a large
      number of entries to be stored at the same hash table position,
      thereby slowing down the Tor instance. With this feature, hash
      table positions are derived from a randomized cryptographic key,
      and an attacker cannot predict which entries will collide. Closes
      ticket 4900.
    - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
      the default at 8GBytes), to better support Raspberry Pi users. Fixes
      bug 9686; bugfix on 0.2.4.14-alpha.

  o Minor features (bridges, pluggable transports):
    - Bridges now write the SHA1 digest of their identity key
      fingerprint (that is, a hash of a hash of their public key) to
      notice-level logs, and to a new hashed-fingerprint file. This
      information will help bridge operators look up their bridge in
      Globe and similar tools. Resolves ticket 10884.
    - Improve the message that Tor displays when running as a bridge
      using pluggable transports without an Extended ORPort listener.
      Also, log the message in the log file too. Resolves ticket 11043.

  o Minor features (other):
    - Add a new option, PredictedPortsRelevanceTime, to control how long
      after having received a request to connect to a given port Tor
      will try to keep circuits ready in anticipation of future requests
      for that port. Patch from "unixninja92"; implements ticket 9176.
    - Generate a warning if any ports are listed in the SocksPolicy,
      DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
      AuthDirBadExit options. (These options only support address
      ranges.) Fixes part of ticket 11108.
    - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
      Country database.

  o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
    - Build without warnings under clang 3.4. (We have some macros that
      define static functions only some of which will get used later in
      the module. Starting with clang 3.4, these give a warning unless the
      unused attribute is set on them.) Resolves ticket 10904.
    - Fix build warnings about missing "a2x" comment when building the
      manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
      Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.

  o Minor bugfixes (client):
    - Improve the log message when we can't connect to a hidden service
      because all of the hidden service directory nodes hosting its
      descriptor are excluded. Improves on our fix for bug 10722, which
      was a bugfix on 0.2.0.10-alpha.
    - Raise a control port warning when we fail to connect to all of
      our bridges. Previously, we didn't inform the controller, and
      the bootstrap process would stall. Fixes bug 11069; bugfix on
      0.2.1.2-alpha.
    - Exit immediately when a process-owning controller exits.
      Previously, tor relays would wait for a little while after their
      controller exited, as if they had gotten an INT signal -- but this
      was problematic, since there was no feedback for the user. To do a
      clean shutdown, controllers should send an INT signal and give Tor
      a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
    - Stop attempting to connect to bridges before our pluggable
      transports are configured (harmless but resulted in some erroneous
      log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
    - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
      generating incorrect SOCKS5 responses, and confusing client
      applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.

  o Minor bugfixes (relays and bridges):
    - Avoid crashing on a malformed resolv.conf file when running a
      relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
    - Non-exit relays no longer launch mock DNS requests to check for
      DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
      non-exit relays stopped servicing DNS requests. Fixes bug 965;
      bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
    - Bridges now report complete directory request statistics. Related
      to bug 5824; bugfix on 0.2.2.1-alpha.
    - Bridges now never collect statistics that were designed for
      relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
    - Stop giving annoying warning messages when we decide not to launch
      a pluggable transport proxy that we don't need (because there are
      no bridges configured to use it). Resolves ticket 5018; bugfix
      on 0.2.5.2-alpha.
    - Give the correct URL in the warning message when trying to run a
      relay on an ancient version of Windows. Fixes bug 9393.

  o Minor bugfixes (backtrace support):
    - Support automatic backtraces on more platforms by using the
      "-fasynchronous-unwind-tables" compiler option. This option is
      needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
      is on by default and table generation is not. This doesn't yet
      add Windows support; only Linux, OSX, and some BSDs are affected.
      Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
    - Avoid strange behavior if two threads hit failed assertions at the
      same time and both try to log backtraces at once. (Previously, if
      this had happened, both threads would have stored their intermediate
      results in the same buffer, and generated junk outputs.) Reported by
      "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
    - Fix a compiler warning in format_number_sigsafe(). Bugfix on
      0.2.5.2-alpha; patch from Nick Hopper.

  o Minor bugfixes (unit tests):
    - Fix a small bug in the unit tests that might have made the tests
      call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
      bugfix on 0.2.5.1-alpha. Patch from Dana Koch.

  o Removed code:
    - Remove all remaining code related to version-0 hidden service
      descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
      the rest of bug 10841.

  o Documentation:
    - Document in the manpage that "KBytes" may also be written as
      "kilobytes" or "KB", that "Kbits" may also be written as
      "kilobits", and so forth. Closes ticket 9222.
    - Document that the ClientOnly config option overrides ORPort.
      Our old explanation made ClientOnly sound as though it did
      nothing at all. Resolves bug 9059.
    - Explain that SocksPolicy, DirPolicy, and similar options don't
      take port arguments. Fixes the other part of ticket 11108.
    - Fix a comment about the rend_server_descriptor_t.protocols field
      to more accurately describe its range. Also, make that field
      unsigned, to more accurately reflect its usage. Fixes bug 9099;
      bugfix on 0.2.1.5-alpha.
    - Fix the manpage's description of HiddenServiceAuthorizeClient:
      the maximum client name length is 16, not 19. Fixes bug 11118;
      bugfix on 0.2.1.6-alpha.

  o Code simplifications and refactoring:
    - Get rid of router->address, since in all cases it was just the
      string representation of router->addr. Resolves ticket 5528.

  o Test infrastructure:
    - Update to the latest version of tinytest.
    - Improve the tinytest implementation of string operation tests so
      that comparisons with NULL strings no longer crash the tests; they
      now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.


Changes in version 0.2.4.21 - 2014-02-28
  Tor 0.2.4.21 further improves security against potential adversaries who
  find breaking 1024-bit crypto doable, and backports several stability
  and robustness patches from the 0.2.5 branch.

  o Major features (client security):
    - When we choose a path for a 3-hop circuit, make sure it contains
      at least one relay that supports the NTor circuit extension
      handshake. Otherwise, there is a chance that we're building
      a circuit that's worth attacking by an adversary who finds
      breaking 1024-bit crypto doable, and that chance changes the game
      theory. Implements ticket 9777.

  o Major bugfixes:
    - Do not treat streams that fail with reason
      END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
      since it could also indicate an ENETUNREACH connection error. Fixes
      part of bug 10777; bugfix on 0.2.4.8-alpha.

  o Code simplification and refactoring:
    - Remove data structures which were introduced to implement the
      CellStatistics option: they are now redundant with the new timestamp
      field in the regular packed_cell_t data structure, which we did
      in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.

  o Minor features:
    - Always clear OpenSSL bignums before freeing them -- even bignums
      that don't contain secrets. Resolves ticket 10793. Patch by
      Florent Daigniere.
    - Build without warnings under clang 3.4. (We have some macros that
      define static functions only some of which will get used later in
      the module. Starting with clang 3.4, these give a warning unless the
      unused attribute is set on them.) Resolves ticket 10904.
    - Update geoip and geoip6 files to the February 7 2014 Maxmind
      GeoLite2 Country database.

  o Minor bugfixes:
    - Set the listen() backlog limit to the largest actually supported
      on the system, not to the value in a header file. Fixes bug 9716;
      bugfix on every released Tor.
    - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
      exit node as a NOROUTE error, not an INTERNAL error, since they
      can apparently happen when trying to connect to the wrong sort
      of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
    - Fix build warnings about missing "a2x" comment when building the
      manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
      Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
    - Avoid a segfault on SIGUSR1, where we had freed a connection but did
      not entirely remove it from the connection lists. Fixes bug 9602;
      bugfix on 0.2.4.4-alpha.
    - Fix a segmentation fault in our benchmark code when running with
      Fedora's OpenSSL package, or any other OpenSSL that provides
      ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
    - Turn "circuit handshake stats since last time" log messages into a
      heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.

  o Documentation fixes:
    - Document that all but one DirPort entry must have the NoAdvertise
      flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.


Changes in version 0.2.5.2-alpha - 2014-02-13
  Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
  like the "poor random number generation" fix and the "building too many
  circuits" fix. It also further improves security against potential
  adversaries who find breaking 1024-bit crypto doable, and launches
  pluggable transports on demand (which gets us closer to integrating
  pluggable transport support by default -- not to be confused with Tor
  bundles enabling pluggable transports and bridges by default).

  o Major features (client security):
    - When we choose a path for a 3-hop circuit, make sure it contains
      at least one relay that supports the NTor circuit extension
      handshake. Otherwise, there is a chance that we're building
      a circuit that's worth attacking by an adversary who finds
      breaking 1024-bit crypto doable, and that chance changes the game
      theory. Implements ticket 9777.
    - Clients now look at the "usecreatefast" consensus parameter to
      decide whether to use CREATE_FAST or CREATE cells for the first hop
      of their circuit. This approach can improve security on connections
      where Tor's circuit handshake is stronger than the available TLS
      connection security levels, but the tradeoff is more computational
      load on guard relays. Implements proposal 221. Resolves ticket 9386.

  o Major features (bridges):
    - Don't launch pluggable transport proxies if we don't have any
      bridges configured that would use them. Now we can list many
      pluggable transports, and Tor will dynamically start one when it
      hears a bridge address that needs it. Resolves ticket 5018.
    - The bridge directory authority now assigns status flags (Stable,
      Guard, etc) to bridges based on thresholds calculated over all
      Running bridges. Now bridgedb can finally make use of its features
      to e.g. include at least one Stable bridge in its answers. Fixes
      bug 9859.

  o Major features (other):
    - Extend ORCONN controller event to include an "ID" parameter,
      and add four new controller event types CONN_BW, CIRC_BW,
      CELL_STATS, and TB_EMPTY that show connection and circuit usage.
      The new events are emitted in private Tor networks only, with the
      goal of being able to better track performance and load during
      full-network simulations. Implements proposal 218 and ticket 7359.
    - On some platforms (currently: recent OSX versions, glibc-based
      platforms that support the ELF format, and a few other
      Unix-like operating systems), Tor can now dump stack traces
      when a crash occurs or an assertion fails. By default, traces
      are dumped to stderr (if possible) and to any logs that are
      reporting errors. Implements ticket 9299.

  o Major bugfixes:
    - Avoid a segfault on SIGUSR1, where we had freed a connection but did
      not entirely remove it from the connection lists. Fixes bug 9602;
      bugfix on 0.2.4.4-alpha.
    - Do not treat streams that fail with reason
      END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
      since it could also indicate an ENETUNREACH connection error. Fixes
      part of bug 10777; bugfix on 0.2.4.8-alpha.

  o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
    - Do not allow OpenSSL engines to replace the PRNG, even when
      HardwareAccel is set. The only default builtin PRNG engine uses
      the Intel RDRAND instruction to replace the entire PRNG, and
      ignores all attempts to seed it with more entropy. That's
      cryptographically stupid: the right response to a new alleged
      entropy source is never to discard all previously used entropy
      sources. Fixes bug 10402; works around behavior introduced in
      OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
      and "rl1987".
    - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
      address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
    - Avoid launching spurious extra circuits when a stream is pending.
      This fixes a bug where any circuit that _wasn't_ unusable for new
      streams would be treated as if it were, causing extra circuits to
      be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.

  o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
    - No longer stop reading or writing on cpuworker connections when
      our rate limiting buckets go empty. Now we should handle circuit
      handshake requests more promptly. Resolves bug 9731.
    - Stop trying to bootstrap all our directory information from
      only our first guard. Discovered while fixing bug 9946; bugfix
      on 0.2.4.8-alpha.

  o Minor features (bridges, pluggable transports):
    - Add threshold cutoffs to the networkstatus document created by
      the Bridge Authority. Fixes bug 1117.
    - On Windows, spawn background processes using the CREATE_NO_WINDOW
      flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
      doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
      Vidalia set this option for us.) Implements ticket 10297.

  o Minor features (security):
    - Always clear OpenSSL bignums before freeing them -- even bignums
      that don't contain secrets. Resolves ticket 10793. Patch by
      Florent Daignière.

  o Minor features (config options and command line):
    - Add an --allow-missing-torrc commandline option that tells Tor to
      run even if the configuration file specified by -f is not available.
      Implements ticket 10060.
    - Add support for the TPROXY transparent proxying facility on Linux.
      See documentation for the new TransProxyType option for more
      details. Implementation by "thomo". Closes ticket 10582.

  o Minor features (controller):
    - Add a new "HS_DESC" controller event that reports activities
      related to hidden service descriptors. Resolves ticket 8510.
    - New "DROPGUARDS" controller command to forget all current entry
      guards. Not recommended for ordinary use, since replacing guards
      too frequently makes several attacks easier. Resolves ticket 9934;
      patch from "ra".

  o Minor features (build):
    - Assume that a user using ./configure --host wants to cross-compile,
      and give an error if we cannot find a properly named
      tool-chain. Add a --disable-tool-name-check option to proceed
      nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
    - If we run ./configure and the compiler recognizes -fstack-protector
      but the linker rejects it, warn the user about a potentially missing
      libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.

  o Minor features (testing):
    - If Python is installed, "make check" now runs extra tests beyond
      the unit test scripts.
    - When bootstrapping a test network, sometimes very few relays get
      the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
      specify a set of relays which should be voted Guard regardless of
      their uptime or bandwidth. Addresses ticket 9206.

  o Minor features (log messages):
    - When ServerTransportPlugin is set on a bridge, Tor can write more
      useful statistics about bridge use in its extrainfo descriptors,
      but only if the Extended ORPort ("ExtORPort") is set too. Add a
      log message to inform the user in this case. Resolves ticket 9651.
    - When receiving a new controller connection, log the origin address.
      Resolves ticket 9698; patch from "sigpipe".
    - When logging OpenSSL engine status at startup, log the status of
      more engines. Fixes ticket 10043; patch from Joshua Datko.
    - Turn "circuit handshake stats since last time" log messages into a
      heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.

  o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
    - Improve the circuit queue out-of-memory handler. Previously, when
      we ran low on memory, we'd close whichever circuits had the most
      queued cells. Now, we close those that have the *oldest* queued
      cells, on the theory that those are most responsible for us
      running low on memory. Based on analysis from a forthcoming paper
      by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
    - Generate bootstrapping status update events correctly when fetching
      microdescriptors. Fixes bug 9927.
    - Update to the October 2 2013 Maxmind GeoLite Country database.

  o Minor bugfixes (clients):
    - When closing a channel that has already been open, do not close
      pending circuits that were waiting to connect to the same relay.
      Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
      finding this bug.

  o Minor bugfixes (relays):
    - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
      exit node as a NOROUTE error, not an INTERNAL error, since they
      can apparently happen when trying to connect to the wrong sort
      of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.

  o Minor bugfixes (bridges):
    - Fix a bug where the first connection works to a bridge that uses a
      pluggable transport with client-side parameters, but we don't send
      the client-side parameters on subsequent connections. (We don't
      use any pluggable transports with client-side parameters yet,
      but ScrambleSuit will soon become the first one.) Fixes bug 9162;
      bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".

  o Minor bugfixes (node selection):
    - If ExcludeNodes is set, consider non-excluded hidden service
      directory servers before excluded ones. Do not consider excluded
      hidden service directory servers at all if StrictNodes is
      set. (Previously, we would sometimes decide to connect to those
      servers, and then realize before we initiated a connection that
      we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
      Reported by "mr-4".
    - If we set the ExitNodes option but it doesn't include any nodes
      that have the Exit flag, we would choose not to bootstrap. Now we
      bootstrap so long as ExitNodes includes nodes which can exit to
      some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.

  o Minor bugfixes (controller and command-line):
    - If changing a config option via "setconf" fails in a recoverable
      way, we used to nonetheless write our new control ports to the
      file described by the "ControlPortWriteToFile" option. Now we only
      write out that file if we successfully switch to the new config
      option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
    - When a command-line option such as --version or --help that
      ordinarily implies --hush appears on the command line along with
      --quiet, then actually obey --quiet. Previously, we obeyed --quiet
      only if it appeared later on the command line. Fixes bug 9578;
      bugfix on 0.2.5.1-alpha.

  o Minor bugfixes (code correctness):
    - Previously we used two temporary files when writing descriptors to
      disk; now we only use one. Fixes bug 1376.
    - Remove an erroneous (but impossible and thus harmless) pointer
      comparison that would have allowed compilers to skip a bounds
      check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
      0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
    - Fix an always-true assertion in pluggable transports code so it
      actually checks what it was trying to check. Fixes bug 10046;
      bugfix on 0.2.3.9-alpha. Found by "dcb".

  o Minor bugfixes (protocol correctness):
    - When receiving a VERSIONS cell with an odd number of bytes, close
      the connection immediately since the cell is malformed. Fixes bug
      10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
      "rl1987".

  o Minor bugfixes (build):
    - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
      turned off (that is, without support for v2 link handshakes). Fixes
      bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
    - Fix compilation warnings and startup issues when running with
      "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
      0.2.5.1-alpha.
    - Fix compilation on Solaris 9, which didn't like us having an
      identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.

  o Minor bugfixes (testing):
    - Fix a segmentation fault in our benchmark code when running with
      Fedora's OpenSSL package, or any other OpenSSL that provides
      ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.

  o Minor bugfixes (log messages):
    - Fix a bug where clients using bridges would report themselves
      as 50% bootstrapped even without a live consensus document.
      Fixes bug 9922; bugfix on 0.2.1.1-alpha.
    - Suppress a warning where, if there's only one directory authority
      in the network, we would complain that votes and signatures cannot
      be uploaded to other directory authorities. Fixes bug 10842;
      bugfix on 0.2.2.26-beta.
    - Report bootstrapping progress correctly when we're downloading
      microdescriptors. We had updated our "do we have enough microdescs
      to begin building circuits?" logic most recently in 0.2.4.10-alpha
      (see bug 5956), but we left the bootstrap status event logic at
      "how far through getting 1/4 of them are we?" Fixes bug 9958;
      bugfix on 0.2.2.36, which is where they diverged (see bug 5343).

  o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
    - Avoid a crash bug when starting with a corrupted microdescriptor
      cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
    - If we fail to dump a previously cached microdescriptor to disk, avoid
      freeing duplicate data later on. Fixes bug 10423; bugfix on
      0.2.4.13-alpha. Spotted by "bobnomnom".

  o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
    - Correctly log long IPv6 exit policies, instead of truncating them
      or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
    - Our default TLS ecdhe groups were backwards: we meant to be using
      P224 for relays (for performance win) and P256 for bridges (since
      it is more common in the wild). Instead we had it backwards. After
      reconsideration, we decided that the default should be P256 on all
      hosts, since its security is probably better, and since P224 is
      reportedly used quite little in the wild.  Found by "skruffy" on
      IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
    - Free directory authority certificate download statuses on exit
      rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.

  o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
    - If the guard we choose first doesn't answer, we would try the
      second guard, but once we connected to the second guard we would
      abandon it and retry the first one, slowing down bootstrapping.
      The fix is to treat all our initially chosen guards as acceptable
      to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
    - Fix an assertion failure that would occur when disabling the
      ORPort setting on a running Tor process while accounting was
      enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
    - When examining the list of network interfaces to find our address,
      do not consider non-running or disabled network interfaces. Fixes
      bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
    - Avoid an off-by-one error when checking buffer boundaries when
      formatting the exit status of a pluggable transport helper.
      This is probably not an exploitable bug, but better safe than
      sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
      Pedro Ribeiro.

  o Removed code and features:
    - Clients now reject any directory authority certificates lacking
      a dir-key-crosscert element. These have been included since
      0.2.1.9-alpha, so there's no real reason for them to be optional
      any longer. Completes proposal 157. Resolves ticket 10162.
    - Remove all code that existed to support the v2 directory system,
      since there are no longer any v2 directory authorities. Resolves
      ticket 10758.
    - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
      options, which were used for designating authorities as "Hidden
      service authorities". There has been no use of hidden service
      authorities since 0.2.2.1-alpha, when we stopped uploading or
      downloading v0 hidden service descriptors. Fixes bug 10881; also
      part of a fix for bug 10841.

  o Code simplification and refactoring:
    - Remove some old fallback code designed to keep Tor clients working
      in a network with only two working relays. Elsewhere in the code we
      have long since stopped supporting such networks, so there wasn't
      much point in keeping it around. Addresses ticket 9926.
    - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
      bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
    - Remove data structures which were introduced to implement the
      CellStatistics option: they are now redundant with the addition
      of a timestamp to the regular packed_cell_t data structure, which
      we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
      ticket 10870.

  o Documentation (man page) fixes:
    - Update manpage to describe some of the files you can expect to
      find in Tor's DataDirectory. Addresses ticket 9839.
    - Document that all but one DirPort entry must have the NoAdvertise
      flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.

  o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
    - Clarify the usage and risks of setting the ContactInfo torrc line
      for your relay or bridge. Resolves ticket 9854.
    - Add anchors to the manpage so we can link to the html version of
      the documentation for specific options. Resolves ticket 9866.
    - Replace remaining references to DirServer in man page and
      log entries. Resolves ticket 10124.

  o Tool changes:
    - Make the "tor-gencert" tool used by directory authority operators
      create 2048-bit signing keys by default (rather than 1024-bit, since
      1024-bit is uncomfortably small these days). Addresses ticket 10324.


Changes in version 0.2.4.20 - 2013-12-22
  Tor 0.2.4.20 fixes potentially poor random number generation for users
  who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
  torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
  and 4) have no state file in their DataDirectory (as would happen on
  first start). Users who generated relay or hidden service identity
  keys in such a situation should discard them and generate new ones.

  This release also fixes a logic error that caused Tor clients to build
  many more preemptive circuits than they actually need.

  o Major bugfixes:
    - Do not allow OpenSSL engines to replace the PRNG, even when
      HardwareAccel is set. The only default builtin PRNG engine uses
      the Intel RDRAND instruction to replace the entire PRNG, and
      ignores all attempts to seed it with more entropy. That's
      cryptographically stupid: the right response to a new alleged
      entropy source is never to discard all previously used entropy
      sources. Fixes bug 10402; works around behavior introduced in
      OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
      and "rl1987".
    - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
      address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
    - Avoid launching spurious extra circuits when a stream is pending.
      This fixes a bug where any circuit that _wasn't_ unusable for new
      streams would be treated as if it were, causing extra circuits to
      be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.

  o Minor bugfixes:
    - Avoid a crash bug when starting with a corrupted microdescriptor
      cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
    - If we fail to dump a previously cached microdescriptor to disk, avoid
      freeing duplicate data later on. Fixes bug 10423; bugfix on
      0.2.4.13-alpha. Spotted by "bobnomnom".


Changes in version 0.2.4.19 - 2013-12-11
  The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
  (1986-2013). Aaron worked on diverse projects including helping to guide
  Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
  transparency to the U.S government's PACER documents, and contributing
  design and development for Tor and Tor2Web. Aaron was one of the latest
  martyrs in our collective fight for civil liberties and human rights,
  and his death is all the more painful because he was one of us.

  Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
  a new circuit handshake and link encryption that use ECC to provide
  better security and efficiency; makes relays better manage circuit
  creation requests; uses "directory guards" to reduce client enumeration
  risks; makes bridges collect and report statistics about the pluggable
  transports they support; cleans up and improves our geoip database;
  gets much closer to IPv6 support for clients, bridges, and relays; makes
  directory authorities use measured bandwidths rather than advertised
  ones when computing flags and thresholds; disables client-side DNS
  caching to reduce tracking risks; and fixes a big bug in bridge
  reachability testing. This release introduces two new design
  abstractions in the code: a new "channel" abstraction between circuits
  and or_connections to allow for implementing alternate relay-to-relay
  transports, and a new "circuitmux" abstraction storing the queue of
  circuits for a channel. The release also includes many stability,
  security, and privacy fixes.


Changes in version 0.2.4.18-rc - 2013-11-16
  Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
  series. It takes a variety of fixes from the 0.2.5.x branch to improve
  stability, performance, and better handling of edge cases.

  o Major features:
    - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
      Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
      1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
      renegotiation from working with TLS 1.1 or 1.2, so we had disabled
      them to solve bug 6033.)

  o Major bugfixes:
    - No longer stop reading or writing on cpuworker connections when
      our rate limiting buckets go empty. Now we should handle circuit
      handshake requests more promptly. Resolves bug 9731.
    - If we are unable to save a microdescriptor to the journal, do not
      drop it from memory and then reattempt downloading it. Fixes bug
      9645; bugfix on 0.2.2.6-alpha.
    - Stop trying to bootstrap all our directory information from
      only our first guard. Discovered while fixing bug 9946; bugfix
      on 0.2.4.8-alpha.
    - The new channel code sometimes lost track of in-progress circuits,
      causing long-running clients to stop building new circuits. The
      fix is to always call circuit_n_chan_done(chan, 0) from
      channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.

  o Minor bugfixes (on 0.2.4.x):
    - Correctly log long IPv6 exit policies, instead of truncating them
      or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
    - Our default TLS ecdhe groups were backwards: we meant to be using
      P224 for relays (for performance win) and P256 for bridges (since
      it is more common in the wild). Instead we had it backwards. After
      reconsideration, we decided that the default should be P256 on all
      hosts, since its security is probably better, and since P224 is
      reportedly used quite little in the wild.  Found by "skruffy" on
      IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
    - Free directory authority certificate download statuses on exit
      rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.

  o Minor bugfixes (on 0.2.3.x and earlier):
    - If the guard we choose first doesn't answer, we would try the
      second guard, but once we connected to the second guard we would
      abandon it and retry the first one, slowing down bootstrapping.
      The fix is to treat all our initially chosen guards as acceptable
      to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
    - Fix an assertion failure that would occur when disabling the
      ORPort setting on a running Tor process while accounting was
      enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
    - When examining the list of network interfaces to find our address,
      do not consider non-running or disabled network interfaces. Fixes
      bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
    - Avoid an off-by-one error when checking buffer boundaries when
      formatting the exit status of a pluggable transport helper.
      This is probably not an exploitable bug, but better safe than
      sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
      Pedro Ribeiro.

  o Minor features (protecting client timestamps):
    - Clients no longer send timestamps in their NETINFO cells. These were
      not used for anything, and they provided one small way for clients
      to be distinguished from each other as they moved from network to
      network or behind NAT. Implements part of proposal 222.
    - Clients now round timestamps in INTRODUCE cells down to the nearest
      10 minutes. If a new Support022HiddenServices option is set to 0, or
      if it's set to "auto" and the feature is disabled in the consensus,
      the timestamp is sent as 0 instead. Implements part of proposal 222.
    - Stop sending timestamps in AUTHENTICATE cells. This is not such
      a big deal from a security point of view, but it achieves no actual
      good purpose, and isn't needed. Implements part of proposal 222.
    - Reduce down accuracy of timestamps in hidden service descriptors.
      Implements part of proposal 222.

  o Minor features (other):
    - Improve the circuit queue out-of-memory handler. Previously, when
      we ran low on memory, we'd close whichever circuits had the most
      queued cells. Now, we close those that have the *oldest* queued
      cells, on the theory that those are most responsible for us
      running low on memory. Based on analysis from a forthcoming paper
      by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
    - Generate bootstrapping status update events correctly when fetching
      microdescriptors. Fixes bug 9927.
    - Update to the October 2 2013 Maxmind GeoLite Country database.

  o Documentation fixes:
    - Clarify the usage and risks of setting the ContactInfo torrc line
      for your relay or bridge. Resolves ticket 9854.
    - Add anchors to the manpage so we can link to the html version of
      the documentation for specific options. Resolves ticket 9866.
    - Replace remaining references to DirServer in man page and
      log entries. Resolves ticket 10124.


Changes in version 0.2.5.1-alpha - 2013-10-02
  Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
  on Linux, allows bridges that offer pluggable transports to report usage
  statistics, fixes many issues to make testing easier, and provides
  a pile of minor features and bugfixes that have been waiting for a
  release of the new branch.

  This is the first alpha release in a new series, so expect there to
  be bugs. Users who would rather test out a more stable branch should
  stay with 0.2.4.x for now.

  o Major features (security):
    - Use the seccomp2 syscall filtering facility on Linux to limit
      which system calls Tor can invoke. This is an experimental,
      Linux-only feature to provide defense-in-depth against unknown
      attacks. To try turning it on, set "Sandbox 1" in your torrc
      file. Please be ready to report bugs. We hope to add support
      for better sandboxing in the future, including more fine-grained
      filters, better division of responsibility, and support for more
      platforms. This work has been done by Cristian-Matei Toader for
      Google Summer of Code.
    - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
      Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
      1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
      renegotiation from working with TLS 1.1 or 1.2, so we had disabled
      them to solve bug 6033.)

  o Major features (other):
    - Add support for passing arguments to managed pluggable transport
      proxies. Implements ticket 3594.
    - Bridges now track GeoIP information and the number of their users
      even when pluggable transports are in use, and report usage
      statistics in their extra-info descriptors. Resolves tickets 4773
      and 5040.
    - Make testing Tor networks bootstrap better: lower directory fetch
      retry schedules and maximum interval without directory requests,
      and raise maximum download tries. Implements ticket 6752.
    - Add make target 'test-network' to run tests on a Chutney network.
      Implements ticket 8530.
    - The ntor handshake is now on-by-default, no matter what the
      directory authorities recommend. Implements ticket 8561.

  o Major bugfixes:
    - Instead of writing destroy cells directly to outgoing connection
      buffers, queue them and intersperse them with other outgoing cells.
      This can prevent a set of resource starvation conditions where too
      many pending destroy cells prevent data cells from actually getting
      delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
      bugfix on 0.2.0.1-alpha.
    - If we are unable to save a microdescriptor to the journal, do not
      drop it from memory and then reattempt downloading it. Fixes bug
      9645; bugfix on 0.2.2.6-alpha.
    - The new channel code sometimes lost track of in-progress circuits,
      causing long-running clients to stop building new circuits. The
      fix is to always call circuit_n_chan_done(chan, 0) from
      channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.

  o Build features:
    - Tor now builds each source file in two modes: a mode that avoids
      exposing identifiers needlessly, and another mode that exposes
      more identifiers for testing. This lets the compiler do better at
      optimizing the production code, while enabling us to take more
      radical measures to let the unit tests test things.
    - The production builds no longer include functions used only in
      the unit tests; all functions exposed from a module only for
      unit-testing are now static in production builds.
    - Add an --enable-coverage configuration option to make the unit
      tests (and a new src/or/tor-cov target) to build with gcov test
      coverage support.

  o Testing:
    - We now have rudimentary function mocking support that our unit
      tests can use to test functions in isolation. Function mocking
      lets the tests temporarily replace a function's dependencies with
      stub functions, so that the tests can check the function without
      invoking the other functions it calls.
    - Add more unit tests for the <circid,channel>->circuit map, and
      the destroy-cell-tracking code to fix bug 7912.
    - Unit tests for failing cases of the TAP onion handshake.
    - More unit tests for address-manipulation functions.

  o Minor features (protecting client timestamps):
    - Clients no longer send timestamps in their NETINFO cells. These were
      not used for anything, and they provided one small way for clients
      to be distinguished from each other as they moved from network to
      network or behind NAT. Implements part of proposal 222.
    - Clients now round timestamps in INTRODUCE cells down to the nearest
      10 minutes. If a new Support022HiddenServices option is set to 0, or
      if it's set to "auto" and the feature is disabled in the consensus,
      the timestamp is sent as 0 instead. Implements part of proposal 222.
    - Stop sending timestamps in AUTHENTICATE cells. This is not such
      a big deal from a security point of view, but it achieves no actual
      good purpose, and isn't needed. Implements part of proposal 222.
    - Reduce down accuracy of timestamps in hidden service descriptors.
      Implements part of proposal 222.

  o Minor features (config options):
    - Config (torrc) lines now handle fingerprints which are missing
      their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
    - Support a --dump-config option to print some or all of the
      configured options. Mainly useful for debugging the command-line
      option parsing code. Helps resolve ticket 4647.
    - Raise awareness of safer logging: notify user of potentially
      unsafe config options, like logging more verbosely than severity
      "notice" or setting SafeLogging to 0. Resolves ticket 5584.
    - Add a new configuration option TestingV3AuthVotingStartOffset
      that bootstraps a network faster by changing the timing for
      consensus votes. Addresses ticket 8532.
    - Add a new torrc option "ServerTransportOptions" that allows
      bridge operators to pass configuration parameters to their
      pluggable transports. Resolves ticket 8929.
    - The config (torrc) file now accepts bandwidth and space limits in
      bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
      you can now say "16 kilobits", and so on.) Resolves ticket 9214.
      Patch by CharlieB.

  o Minor features (build):
    - Add support for `--library-versions` flag. Implements ticket 6384.
    - Return the "unexpected sendme" warnings to a warn severity, but make
      them rate limited, to help diagnose ticket 8093.
    - Detect a missing asciidoc, and warn the user about it, during
      configure rather than at build time. Fixes issue 6506. Patch from
      Arlo Breault.

  o Minor features (other):
    - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
      sockets in a single system call. Implements ticket 5129.
    - Log current accounting state (bytes sent and received + remaining
      time for the current accounting period) in the relay's heartbeat
      message. Implements ticket 5526; patch from Peter Retzlaff.
    - Implement the TRANSPORT_LAUNCHED control port event that
      notifies controllers about new launched pluggable
      transports. Resolves ticket 5609.
    - If we're using the pure-C 32-bit curve25519_donna implementation
      of curve25519, build it with the -fomit-frame-pointer option to
      make it go faster on register-starved hosts. This improves our
      handshake performance by about 6% on i386 hosts without nacl.
      Closes ticket 8109.
    - Update to the September 4 2013 Maxmind GeoLite Country database.

  o Minor bugfixes:
    - Set the listen() backlog limit to the largest actually supported
      on the system, not to the value in a header file. Fixes bug 9716;
      bugfix on every released Tor.
    - No longer accept malformed http headers when parsing urls from
      headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
      bugfix on 0.0.6pre1.
    - In munge_extrainfo_into_routerinfo(), check the return value of
      memchr(). This would have been a serious issue if we ever passed
      it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
      from Arlo Breault.
    - On the chance that somebody manages to build Tor on a
      platform where time_t is unsigned, correct the way that
      microdesc_add_to_cache() handles negative time arguments.
      Fixes bug 8042; bugfix on 0.2.3.1-alpha.
    - Reject relative control socket paths and emit a warning. Previously,
      single-component control socket paths would be rejected, but Tor
      would not log why it could not validate the config. Fixes bug 9258;
      bugfix on 0.2.3.16-alpha.

  o Minor bugfixes (command line):
    - Use a single command-line parser for parsing torrc options on the
      command line and for finding special command-line options to avoid
      inconsistent behavior for torrc option arguments that have the same
      names as command-line options. Fixes bugs 4647 and 9578; bugfix on
      0.0.9pre5.
    - No longer allow 'tor --hash-password' with no arguments. Fixes bug
      9573; bugfix on 0.0.9pre5.

  o Minor fixes (build, auxiliary programs):
    - Stop preprocessing the "torify" script with autoconf, since
      it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
      from Guilhem.
    - The tor-fw-helper program now follows the standard convention and
      exits with status code "0" on success. Fixes bug 9030; bugfix on
      0.2.3.1-alpha. Patch by Arlo Breault.
    - Corrected ./configure advice for what openssl dev package you should
      install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.

  o Minor code improvements:
    - Remove constants and tests for PKCS1 padding; it's insecure and
      shouldn't be used for anything new. Fixes bug 8792; patch
      from Arlo Breault.
    - Remove instances of strcpy() from the unit tests. They weren't
      hurting anything, since they were only in the unit tests, but it's
      embarassing to have strcpy() in the code at all, and some analysis
      tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
      0.2.3.8-alpha. Patch from Arlo Breault.

  o Removed features:
    - Remove migration code from when we renamed the "cached-routers"
      file to "cached-descriptors" back in 0.2.0.8-alpha. This
      incidentally resolves ticket 6502 by cleaning up the related code
      a bit. Patch from Akshay Hebbar.

  o Code simplification and refactoring:
    - Extract the common duplicated code for creating a subdirectory
      of the data directory and writing to a file in it. Fixes ticket
      4282; patch from Peter Retzlaff.
    - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
      buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
      i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
    - Add a set of accessor functions for the circuit timeout data
      structure. Fixes ticket 6153; patch from "piet".
    - Clean up exit paths from connection_listener_new(). Closes ticket
      8789. Patch from Arlo Breault.
    - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
      and drop our own custom pkey_eq() implementation. Fixes bug 9043.
    - Use a doubly-linked list to implement the global circuit list.
      Resolves ticket 9108. Patch from Marek Majkowski.
    - Remove contrib/id_to_fp.c since it wasn't used anywhere.


Changes in version 0.2.4.17-rc - 2013-09-05
  Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
  series. It adds an emergency step to help us tolerate the massive
  influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
  circuit-level handshakes now effectively jump the queue compared to
  the 0.2.3 clients using "TAP" handshakes. This release also fixes a
  big bug hindering bridge reachability tests.

  o Major features:
    - Relays now process the new "NTor" circuit-level handshake requests
      with higher priority than the old "TAP" circuit-level handshake
      requests. We still process some TAP requests to not totally starve
      0.2.3 clients when NTor becomes popular. A new consensus parameter
      "NumNTorsPerTAP" lets us tune the balance later if we need to.
      Implements ticket 9574.

  o Major bugfixes:
    - If the circuit build timeout logic is disabled (via the consensus,
      or because we are an authority), then don't build testing circuits.
      Fixes bug 9657; bugfix on 0.2.2.14-alpha.
    - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
      previously they did not, which prevented them from receiving
      successful connections from relays for self-test or bandwidth
      testing. Also, when a relay is extending a circuit to a bridge,
      it needs to send a NETINFO cell, even when the bridge hasn't sent
      an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
    - If the time to download the next old-style networkstatus is in
      the future, do not decline to consider whether to download the
      next microdescriptor networkstatus. Fixes bug 9564; bugfix on
      0.2.3.14-alpha.

  o Minor bugfixes:
    - Avoid double-closing the listener socket in our socketpair()
      replacement (used on Windows) in the case where the addresses on
      our opened sockets don't match what we expected. Fixes bug 9400;
      bugfix on 0.0.2pre7. Found by Coverity.

  o Minor fixes (config options):
    - Avoid overflows when the user sets MaxCircuitDirtiness to a
      ridiculously high value, by imposing a (ridiculously high) 30-day
      maximum on MaxCircuitDirtiness.
    - Fix the documentation of HeartbeatPeriod to say that the heartbeat
      message is logged at notice, not at info.
    - Warn and fail if a server is configured not to advertise any
      ORPorts at all. (We need *something* to put in our descriptor,
      or we just won't work.)

  o Minor features:
    - Track how many "TAP" and "NTor" circuit handshake requests we get,
      and how many we complete, and log it every hour to help relay
      operators follow trends in network load. Addresses ticket 9658.
    - Update to the August 7 2013 Maxmind GeoLite Country database.


Changes in version 0.2.4.16-rc - 2013-08-10
  Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
  series. It fixes several crash bugs in the 0.2.4 branch.

  o Major bugfixes:
    - Fix a bug in the voting algorithm that could yield incorrect results
      when a non-naming authority declared too many flags. Fixes bug 9200;
      bugfix on 0.2.0.3-alpha.
    - Fix an uninitialized read that could in some cases lead to a remote
      crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
      Anybody running a hidden service on the experimental 0.2.4.x
      branch should upgrade. (This is, so far as we know, unrelated to
      the recent news.)
    - Avoid an assertion failure when processing DNS replies without the
      answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
    - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
      0.2.4.15-rc. Found by stem integration tests.

  o Minor bugfixes:
    - Fix an invalid memory read that occured when a pluggable
      transport proxy failed its configuration protocol.
      Fixes bug 9288; bugfix on 0.2.4.1-alpha.
    - When evaluating whether to use a connection that we haven't
      decided is canonical using a recent link protocol version,
      decide that it's canonical only if it used address _does_
      match the desired address. Fixes bug 9309; bugfix on
      0.2.4.4-alpha. Reported by skruffy.
    - Make the default behavior of NumDirectoryGuards be to track
      NumEntryGuards. Now a user who changes only NumEntryGuards will get
      the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
    - Fix a spurious compilation warning with some older versions of
      GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.

  o Minor features:
    - Update to the July 3 2013 Maxmind GeoLite Country database.


Changes in version 0.2.4.15-rc - 2013-07-01
  Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
  series. It fixes a few smaller bugs, but generally appears stable.
  Please test it and let us know whether it is!

  o Major bugfixes:
    - When receiving a new configuration file via the control port's
      LOADCONF command, do not treat the defaults file as absent.
      Fixes bug 9122; bugfix on 0.2.3.9-alpha.

  o Minor features:
    - Issue a warning when running with the bufferevents backend enabled.
      It's still not stable, and people should know that they're likely
      to hit unexpected problems. Closes ticket 9147.


Changes in version 0.2.4.14-alpha - 2013-06-18
  Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
  present in 0.2.4.13-alpha.

  o Major bugfixes:
    - When we have too much memory queued in circuits (according to a new
      MaxMemInCellQueues option), close the circuits consuming the most
      memory. This prevents us from running out of memory as a relay if
      circuits fill up faster than they can be drained. Fixes bug 9063;
      bugfix on the 54th commit of Tor. This bug is a further fix beyond
      bug 6252, whose fix was merged into 0.2.3.21-rc.

      This change also fixes an earlier approach taken in 0.2.4.13-alpha,
      where we tried to solve this issue simply by imposing an upper limit
      on the number of queued cells for a single circuit. That approach
      proved to be problematic, since there are ways to provoke clients to
      send a number of cells in excess of any such reasonable limit. Fixes
      bug 9072; bugfix on 0.2.4.13-alpha.

    - Limit hidden service descriptors to at most ten introduction
      points, to slow one kind of guard enumeration. Fixes bug 9002;
      bugfix on 0.1.1.11-alpha.


Changes in version 0.2.4.13-alpha - 2013-06-14
  Tor 0.2.4.13-alpha fixes a variety of potential remote crash
  vulnerabilities, makes socks5 username/password circuit isolation
  actually actually work (this time for sure!), and cleans up a bunch
  of other issues in preparation for a release candidate.

  o Major bugfixes (robustness):
    - Close any circuit that has too many cells queued on it. Fixes
      bug 9063; bugfix on the 54th commit of Tor. This bug is a further
      fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
    - Prevent the get_freelists() function from running off the end of
      the list of freelists if it somehow gets an unrecognized
      allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
      eugenis.
    - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
      when an exit connection with optimistic data succeeds immediately
      rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
      0.2.3.1-alpha.
    - Fix a directory authority crash bug when building a consensus
      using an older consensus as its basis. Fixes bug 8833. Bugfix
      on 0.2.4.12-alpha.

  o Major bugfixes:
    - Avoid a memory leak where we would leak a consensus body when we
      find that a consensus which we couldn't previously verify due to
      missing certificates is now verifiable. Fixes bug 8719; bugfix
      on 0.2.0.10-alpha.
    - We used to always request authority certificates by identity digest,
      meaning we'd get the newest one even when we wanted one with a
      different signing key. Then we would complain about being given
      a certificate we already had, and never get the one we really
      wanted. Now we use the "fp-sk/" resource as well as the "fp/"
      resource to request the one we want. Fixes bug 5595; bugfix on
      0.2.0.8-alpha.
    - Follow the socks5 protocol when offering username/password
      authentication. The fix for bug 8117 exposed this bug, and it
      turns out real-world applications like Pidgin do care. Bugfix on
      0.2.3.2-alpha; fixes bug 8879.
    - Prevent failures on Windows Vista and later when rebuilding the
      microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
      bugfix on 0.2.4.12-alpha.

  o Minor bugfixes:
    - Fix an impossible buffer overrun in the AES unit tests. Fixes
      bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
    - If for some reason we fail to write a microdescriptor while
      rebuilding the cache, do not let the annotations from that
      microdescriptor linger in the cache file, and do not let the
      microdescriptor stay recorded as present in its old location.
      Fixes bug 9047; bugfix on 0.2.2.6-alpha.
    - Fix a memory leak that would occur whenever a configuration
      option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
    - Paste the description for PathBias parameters from the man
      page into or.h, so the code documents them too. Fixes bug 7982;
      bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
    - Relays now treat a changed IPv6 ORPort as sufficient reason to
      publish an updated descriptor. Fixes bug 6026; bugfix on
      0.2.4.1-alpha.
    - When launching a resolve request on behalf of an AF_UNIX control
      socket, omit the address field of the new entry connection, used in
      subsequent controller events, rather than letting tor_dup_addr()
      set it to "<unknown address type>". Fixes bug 8639; bugfix on
      0.2.4.12-alpha.

  o Minor bugfixes (log messages):
    - Fix a scaling issue in the path bias accounting code that
      resulted in "Bug:" log messages from either
      pathbias_scale_close_rates() or pathbias_count_build_success().
      This represents a bugfix on a previous bugfix: the original fix
      attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
      on 0.2.4.1-alpha.
    - Give a less useless error message when the user asks for an IPv4
      address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
      on 0.2.4.7-alpha.

  o Minor features:
    - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
      to tolerate bug 8093 for now.
    - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
      in directory authority votes to describe whether they have enough
      measured bandwidths to ignore advertised (relay descriptor)
      bandwidth claims. Resolves ticket 8711.
    - Update to the June 5 2013 Maxmind GeoLite Country database.

  o Removed documentation:
    - Remove some of the older contents of doc/ as obsolete; move others
      to torspec.git. Fixes bug 8965.

  o Code simplification and refactoring:
    - Avoid using character buffers when constructing most directory
      objects: this approach was unwieldy and error-prone. Instead,
      build smartlists of strings, and concatenate them when done.


Changes in version 0.2.4.12-alpha - 2013-04-18
  Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
  process for lengthening the guard rotation period, makes directory
  authority opinions in the consensus a bit less gameable, makes socks5
  username/password circuit isolation actually work, and fixes a wide
  variety of other issues.

  o Major features:
    - Raise the default time that a client keeps an entry guard from
      "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
      2012 paper. (We would make it even longer, but we need better client
      load balancing first.) Also, make the guard lifetime controllable
      via a new GuardLifetime torrc option and a GuardLifetime consensus
      parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
    - Directory authorities now prefer using measured bandwidths to
      advertised ones when computing flags and thresholds. Resolves
      ticket 8273.
    - Directory authorities that have more than a threshold number
      of relays with measured bandwidths now treat relays with unmeasured
      bandwidths as having bandwidth 0. Resolves ticket 8435.

  o Major bugfixes (assert / resource use):
    - Avoid a bug where our response to TLS renegotiation under certain
      network conditions could lead to a busy-loop, with 100% CPU
      consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
    - Avoid an assertion when we discover that we'd like to write a cell
      onto a closing connection: just discard the cell. Fixes another
      case of bug 7350; bugfix on 0.2.4.4-alpha.

  o Major bugfixes (client-side privacy):
    - When we mark a circuit as unusable for new circuits, have it
      continue to be unusable for new circuits even if MaxCircuitDirtiness
      is increased too much at the wrong time, or the system clock jumps
      backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
    - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
      which have resolved to internal addresses") is set, apply that
      rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
    - When an exit relay rejects a stream with reason "exit policy", but
      we only know an exit policy summary (e.g. from the microdesc
      consensus) for it, do not mark the relay as useless for all exiting.
      Instead, mark just the circuit as unsuitable for that particular
      address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
    - Allow applications to get proper stream isolation with
      IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
      username/password authentication also offer "no authentication". Tor
      had previously preferred "no authentication", so the applications
      never actually sent Tor their auth details. Now Tor selects
      username/password authentication if it's offered. You can disable
      this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
      bug 8117; bugfix on 0.2.3.3-alpha.

  o Major bugfixes (other):
    - When unable to find any working directory nodes to use as a
      directory guard, give up rather than adding the same non-working
      nodes to the directory guard list over and over. Fixes bug 8231;
      bugfix on 0.2.4.8-alpha.

  o Minor features:
    - Reject as invalid most directory objects containing a NUL.
      Belt-and-suspender fix for bug 8037.
    - In our testsuite, create temporary directories with a bit more
      entropy in their name to make name collisions less likely. Fixes
      bug 8638.
    - Add CACHED keyword to ADDRMAP events in the control protocol
      to indicate whether a DNS result will be cached or not. Resolves
      ticket 8596.
    - Update to the April 3 2013 Maxmind GeoLite Country database.

  o Minor features (build):
    - Detect and reject attempts to build Tor with threading support
      when OpenSSL has been compiled without threading support.
      Fixes bug 6673.
    - Clarify that when autoconf is checking for nacl, it is checking
      specifically for nacl with a fast curve25519 implementation.
      Fixes bug 8014.
    - Warn if building on a platform with an unsigned time_t: there
      are too many places where Tor currently assumes that time_t can
      hold negative values. We'd like to fix them all, but probably
      some will remain.

  o Minor bugfixes (build):
    - Fix some bugs in tor-fw-helper-natpmp when trying to build and
      run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
      Fixes bug 7280; bugfix on 0.2.3.1-alpha.
    - Add the old src/or/micro-revision.i filename to CLEANFILES.
      On the off chance that somebody has one, it will go away as soon
      as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
    - Build Tor correctly on 32-bit platforms where the compiler can build
      but not run code using the "uint128_t" construction. Fixes bug 8587;
      bugfix on 0.2.4.8-alpha.
    - Fix compilation warning with some versions of clang that would
      prefer the -Wswitch-enum compiler flag to warn about switch
      statements with missing enum values, even if those switch
      statements have a "default:" statement. Fixes bug 8598; bugfix
      on 0.2.4.10-alpha.

  o Minor bugfixes (protocol):
    - Fix the handling of a TRUNCATE cell when it arrives while the
      circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
    - Fix a misframing issue when reading the version numbers in a
      VERSIONS cell. Previously we would recognize [00 01 00 02] as
      'version 1, version 2, and version 0x100', when it should have
      only included versions 1 and 2. Fixes bug 8059; bugfix on
      0.2.0.10-alpha. Reported pseudonymously.
    - Make the format and order of STREAM events for DNS lookups
      consistent among the various ways to launch DNS lookups. Fixes
      bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy."
    - Correct our check for which versions of Tor support the EXTEND2
      cell. We had been willing to send it to Tor 0.2.4.7-alpha and
      later, when support was really added in version 0.2.4.8-alpha.
      Fixes bug 8464; bugfix on 0.2.4.8-alpha.

  o Minor bugfixes (other):
    - Correctly store microdescriptors and extrainfo descriptors with
      an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
      Bug reported by "cypherpunks".
    - Increase the width of the field used to remember a connection's
      link protocol version to two bytes. Harmless for now, since the
      only currently recognized versions are one byte long. Reported
      pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
    - If the state file's path bias counts are invalid (presumably from a
      buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
      additional checks and log messages to the scaling of Path Bias
      counts, in case there still are remaining issues with scaling.
      Should help resolve bug 8235.
    - Eliminate several instances where we use "Nickname=ID" to refer to
      nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
      "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
      on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.

  o Minor bugfixes (syscalls):
    - Always check the return values of functions fcntl() and
      setsockopt(). We don't believe these are ever actually failing in
      practice, but better safe than sorry. Also, checking these return
      values should please analysis tools like Coverity. Patch from
      'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
    - Use direct writes rather than stdio when building microdescriptor
      caches, in an attempt to mitigate bug 8031, or at least make it
      less common.

  o Minor bugfixes (config):
    - When rejecting a configuration because we were unable to parse a
      quoted string, log an actual error message. Fixes bug 7950; bugfix
      on 0.2.0.16-alpha.
    - Behave correctly when the user disables LearnCircuitBuildTimeout
      but doesn't tell us what they would like the timeout to be. Fixes
      bug 6304; bugfix on 0.2.2.14-alpha.
    - When autodetecting the number of CPUs, use the number of available
      CPUs in preference to the number of configured CPUs. Inform the
      user if this reduces the number of available CPUs. Fixes bug 8002;
      bugfix on 0.2.3.1-alpha.
    - Make it an error when you set EntryNodes but disable UseGuardNodes,
      since it will (surprisingly to some users) ignore EntryNodes. Fixes
      bug 8180; bugfix on 0.2.3.11-alpha.
    - Allow TestingTorNetworks to override the 4096-byte minimum for
      the Fast threshold. Otherwise they can't bootstrap until they've
      observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
    - Fix some logic errors when the user manually overrides the
      PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
      on 0.2.4.10-alpha.

  o Minor bugfixes (log messages to help diagnose bugs):
    - If we fail to free a microdescriptor because of bug 7164, log
      the filename and line number from which we tried to free it.
    - Add another diagnostic to the heartbeat message: track and log
      overhead that TLS is adding to the data we write. If this is
      high, we are sending too little data to SSL_write at a time.
      Diagnostic for bug 7707.
    - Add more detail to a log message about relaxed timeouts, to help
      track bug 7799.
    - Warn more aggressively when flushing microdescriptors to a
      microdescriptor cache fails, in an attempt to mitigate bug 8031,
      or at least make it more diagnosable.
    - Improve debugging output to help track down bug 8185 ("Bug:
      outgoing relay cell has n_chan==NULL. Dropping.")
    - Log the purpose of a path-bias testing circuit correctly.
      Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.

  o Minor bugfixes (0.2.4.x log messages that were too noisy):
    - Don't attempt to relax the timeout of already opened 1-hop circuits.
      They might never timeout. This should eliminate some/all cases of
      the relaxed timeout log message.
    - Use circuit creation time for network liveness evaluation. This
      should eliminate warning log messages about liveness caused
      by changes in timeout evaluation. Fixes bug 6572; bugfix on
      0.2.4.8-alpha.
    - Reduce a path bias length check from notice to info. The message
      is triggered when creating controller circuits. Fixes bug 8196;
      bugfix on 0.2.4.8-alpha.
    - Fix a path state issue that triggered a notice during relay startup.
      Fixes bug 8320; bugfix on 0.2.4.10-alpha.
    - Reduce occurrences of warns about circuit purpose in
      connection_ap_expire_building(). Fixes bug 8477; bugfix on
      0.2.4.11-alpha.

  o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
    - If we encounter a write failure on a SOCKS connection before we
      finish our SOCKS handshake, don't warn that we closed the
      connection before we could send a SOCKS reply. Fixes bug 8427;
      bugfix on 0.1.0.1-rc.
    - Correctly recognize that [::1] is a loopback address. Fixes
      bug 8377; bugfix on 0.2.1.3-alpha.
    - Fix a directory authority warn caused when we have a large amount
      of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
    - Don't log inappropriate heartbeat messages when hibernating: a
      hibernating node is _expected_ to drop out of the consensus,
      decide it isn't bootstrapped, and so forth. Fixes bug 7302;
      bugfix on 0.2.3.1-alpha.
    - Don't complain about bootstrapping problems while hibernating.
      These complaints reflect a general code problem, but not one
      with any problematic effects (no connections are actually
      opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.

  o Documentation fixes:
    - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
      names match. Fixes bug 7768.
    - Make the torify manpage no longer refer to tsocks; torify hasn't
      supported tsocks since 0.2.3.14-alpha.
    - Make the tor manpage no longer reference tsocks.
    - Fix the GeoIPExcludeUnknown documentation to refer to
      ExcludeExitNodes rather than the currently nonexistent
      ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.

  o Removed files:
    - The tor-tsocks.conf is no longer distributed or installed. We
      recommend that tsocks users use torsocks instead. Resolves
      ticket 8290.


Changes in version 0.2.4.11-alpha - 2013-03-11
  Tor 0.2.4.11-alpha makes relay measurement by directory authorities
  more robust, makes hidden service authentication work again, and
  resolves a DPI fingerprint for Tor's SSL transport.

  o Major features (directory authorities):
    - Directory authorities now support a new consensus method (17)
      where they cap the published bandwidth of servers for which
      insufficient bandwidth measurements exist. Fixes part of bug 2286.
    - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
      serve any v2 directory information. Now we can test disabling the
      old deprecated v2 directory format, and see whether doing so has
      any effect on network load. Begins to fix bug 6783.
    - Directory authorities now include inside each vote a statement of
      the performance thresholds they used when assigning flags.
      Implements ticket 8151.

  o Major bugfixes (directory authorities):
    - Stop marking every relay as having been down for one hour every
      time we restart a directory authority. These artificial downtimes
      were messing with our Stable and Guard flag calculations. Fixes
      bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.

  o Major bugfixes (hidden services):
    - Allow hidden service authentication to succeed again. When we
      refactored the hidden service introduction code back
      in 0.2.4.1-alpha, we didn't update the code that checks
      whether authentication information is present, causing all
      authentication checks to return "false". Fix for bug 8207; bugfix
      on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.

  o Minor features (relays, bridges):
    - Make bridge relays check once a minute for whether their IP
      address has changed, rather than only every 15 minutes. Resolves
      bugs 1913 and 1992.
    - Refactor resolve_my_address() so it returns the method by which we
      decided our public IP address (explicitly configured, resolved from
      explicit hostname, guessed from interfaces, learned by gethostname).
      Now we can provide more helpful log messages when a relay guesses
      its IP address incorrectly (e.g. due to unexpected lines in
      /etc/hosts). Resolves ticket 2267.
    - Teach bridge-using clients to avoid 0.2.2 bridges when making
      microdescriptor-related dir requests, and only fall back to normal
      descriptors if none of their bridges can handle microdescriptors
      (as opposed to the fix in ticket 4013, which caused them to fall
      back to normal descriptors if *any* of their bridges preferred
      them). Resolves ticket 4994.
    - Randomize the lifetime of our SSL link certificate, so censors can't
      use the static value for filtering Tor flows. Resolves ticket 8443;
      related to ticket 4014 which was included in 0.2.2.33.
    - Support a new version of the link protocol that allows 4-byte circuit
      IDs. Previously, circuit IDs were limited to 2 bytes, which presented
      a possible resource exhaustion issue. Closes ticket 7351; implements
      proposal 214.

  o Minor features (portability):
    - Tweak the curve25519-donna*.c implementations to tolerate systems
      that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
    - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
      the signs of types during autoconf. This is better than our old
      approach, which didn't work when cross-compiling.
    - Detect the sign of enum values, rather than assuming that MSC is the
      only compiler where enum types are all signed. Fixes bug 7727;
      bugfix on 0.2.4.10-alpha.

  o Minor features (other):
    - Say "KBytes" rather than "KB" in the man page (for various values
      of K), to further reduce confusion about whether Tor counts in
      units of memory or fractions of units of memory. Resolves ticket 7054.
    - Clear the high bit on curve25519 public keys before passing them to
      our backend, in case we ever wind up using a backend that doesn't do
      so itself. If we used such a backend, and *didn't* clear the high bit,
      we could wind up in a situation where users with such backends would
      be distinguishable from users without. Fixes bug 8121; bugfix on
      0.2.4.8-alpha.
    - Update to the March 6 2013 Maxmind GeoLite Country database.

  o Minor bugfixes (clients):
    - When we receive a RELAY_END cell with the reason DONE, or with no
      reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
      status as "connection refused". Previously we reported these cases
      as success but then immediately closed the connection. Fixes bug
      7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
    - Downgrade an assertion in connection_ap_expire_beginning to an
      LD_BUG message. The fix for bug 8024 should prevent this message
      from displaying, but just in case, a warn that we can diagnose
      is better than more assert crashes. Fixes bug 8065; bugfix on
      0.2.4.8-alpha.
    - Lower path use bias thresholds to .80 for notice and .60 for warn.
      Also make the rate limiting flags for the path use bias log messages
      independent from the original path bias flags. Fixes bug 8161;
      bugfix on 0.2.4.10-alpha.

  o Minor bugfixes (relays):
    - Stop trying to resolve our hostname so often (e.g. every time we
      think about doing a directory fetch). Now we reuse the cached
      answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
      and 2410 (bugfix on 0.1.2.2-alpha).
    - Stop sending a stray "(null)" in some cases for the server status
      "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
      on 0.1.2.6-alpha.
    - When choosing which stream on a formerly stalled circuit to wake
      first, make better use of the platform's weak RNG. Previously,
      we had been using the % ("modulo") operator to try to generate a
      1/N chance of picking each stream, but this behaves badly with
      many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
      0.2.2.20-alpha.
    - Use our own weak RNG when we need a weak RNG. Windows's rand() and
      Irix's random() only return 15 bits; Solaris's random() returns more
      bits but its RAND_MAX says it only returns 15, and so on. Motivated
      by the fix for bug 7801; bugfix on 0.2.2.20-alpha.

  o Minor bugfixes (directory authorities):
    - Directory authorities now use less space when formatting identical
      microdescriptor lines in directory votes. Fixes bug 8158; bugfix
      on 0.2.4.1-alpha.

  o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
    - Avoid leaking memory if we fail to compute a consensus signature
      or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
    - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
      on 0.2.1.1-alpha.
    - Fix a memory leak during safe-cookie controller authentication.
      Bugfix on 0.2.3.13-alpha.
    - Avoid memory leak of IPv6 policy content if we fail to format it into
      a router descriptor. Bugfix on 0.2.4.7-alpha.

  o Minor bugfixes (other code correctness issues):
    - Avoid a crash if we fail to generate an extrainfo descriptor.
      Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
      this is CID 718634.
    - When detecting the largest possible file descriptor (in order to
      close all file descriptors when launching a new program), actually
      use _SC_OPEN_MAX. The old code for doing this was very, very broken.
      Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
      is CID 743383.
    - Fix a copy-and-paste error when adding a missing A1 to a routerset
      because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
      Bugfix on 0.2.4.10-alpha.
    - Fix an impossible-to-trigger integer overflow when estimating how
      long our onionskin queue would take. (This overflow would require us
      to accept 4 million onionskins before processing 100 of them.) Fixes
      bug 8210; bugfix on 0.2.4.10-alpha.

  o Code simplification and refactoring:
    - Add a wrapper function for the common "log a message with a
      rate-limit" case.


Changes in version 0.2.4.10-alpha - 2013-02-04
  Tor 0.2.4.10-alpha adds defenses at the directory authority level from
  certain attacks that flood the network with relays; changes the queue
  for circuit create requests from a sized-based limit to a time-based
  limit; resumes building with MSVC on Windows; and fixes a wide variety
  of other issues.

  o Major bugfixes (directory authority):
    - When computing directory thresholds, ignore any rejected-as-sybil
      nodes during the computation so that they can't influence Fast,
      Guard, etc. (We should have done this for proposal 109.) Fixes
      bug 8146.
    - When marking a node as a likely sybil, reset its uptime metrics
      to zero, so that it cannot time towards getting marked as Guard,
      Stable, or HSDir. (We should have done this for proposal 109.) Fixes
      bug 8147.

  o Major bugfixes:
    - When a TLS write is partially successful but incomplete, remember
      that the flushed part has been flushed, and notice that bytes were
      actually written. Reported and fixed pseudonymously. Fixes bug
      7708; bugfix on Tor 0.1.0.5-rc.
    - Reject bogus create and relay cells with 0 circuit ID or 0 stream
      ID: these could be used to create unexpected streams and circuits
      which would count as "present" to some parts of Tor but "absent"
      to others, leading to zombie circuits and streams or to a bandwidth
      denial-of-service. Fixes bug 7889; bugfix on every released version
      of Tor. Reported by "oftc_must_be_destroyed".
    - Rename all macros in our local copy of queue.h to begin with "TOR_".
      This change seems the only good way to permanently prevent conflicts
      with queue.h on various operating systems. Fixes bug 8107; bugfix
      on 0.2.4.6-alpha.

  o Major features (relay):
    - Instead of limiting the number of queued onionskins (aka circuit
      create requests) to a fixed, hard-to-configure number, we limit
      the size of the queue based on how many we expect to be able to
      process in a given amount of time. We estimate the time it will
      take to process an onionskin based on average processing time
      of previous onionskins. Closes ticket 7291. You'll never have to
      configure MaxOnionsPending again.

  o Major features (portability):
    - Resume building correctly with MSVC and Makefile.nmake. This patch
      resolves numerous bugs and fixes reported by ultramage, including
      7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
    - Make the ntor and curve25519 code build correctly with MSVC.
      Fix on 0.2.4.8-alpha.

  o Minor features:
    - When directory authorities are computing thresholds for flags,
      never let the threshold for the Fast flag fall below 4096
      bytes. Also, do not consider nodes with extremely low bandwidths
      when deciding thresholds for various directory flags. This change
      should raise our threshold for Fast relays, possibly in turn
      improving overall network performance; see ticket 1854. Resolves
      ticket 8145.
    - The Tor client now ignores sub-domain components of a .onion
      address. This change makes HTTP "virtual" hosting
      possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
      http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
      hosted on the same hidden service. Implements proposal 204.
    - We compute the overhead from passing onionskins back and forth to
      cpuworkers, and report it when dumping statistics in response to
      SIGUSR1. Supports ticket 7291.

  o Minor features (path selection):
    - When deciding whether we have enough descriptors to build circuits,
      instead of looking at raw relay counts, look at which fraction
      of (bandwidth-weighted) paths we're able to build. This approach
      keeps clients from building circuits if their paths are likely to
      stand out statistically. The default fraction of paths needed is
      taken from the consensus directory; you can override it with the
      new PathsNeededToBuildCircuits option. Fixes ticket 5956.
    - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
      and we have GeoIP information, also exclude all nodes with unknown
      countries "??" and "A1". This behavior is controlled by the
      new GeoIPExcludeUnknown option: you can make such nodes always
      excluded with "GeoIPExcludeUnknown 1", and disable the feature
      with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
      gets you the default behavior. Implements feature 7706.
    - Path Use Bias: Perform separate accounting for successful circuit
      use. Keep separate statistics on stream attempt rates versus stream
      success rates for each guard. Provide configurable thresholds to
      determine when to emit log messages or disable use of guards that
      fail too many stream attempts. Resolves ticket 7802.

  o Minor features (log messages):
    - When learning a fingerprint for a bridge, log its corresponding
      transport type. Implements ticket 7896.
    - Improve the log message when "Bug/attack: unexpected sendme cell
      from client" occurs, to help us track bug 8093.

  o Minor bugfixes:
    - Remove a couple of extraneous semicolons that were upsetting the
      cparser library. Patch by Christian Grothoff. Fixes bug 7115;
      bugfix on 0.2.2.1-alpha.
    - Remove a source of rounding error during path bias count scaling;
      don't count cannibalized circuits as used for path bias until we
      actually try to use them; and fix a circuit_package_relay_cell()
      warning message about n_chan==NULL. Fixes bug 7802.
    - Detect nacl when its headers are in a nacl/ subdirectory. Also,
      actually link against nacl when we're configured to use it. Fixes
      bug 7972; bugfix on 0.2.4.8-alpha.
    - Compile correctly with the --disable-curve25519 option. Fixes
      bug 8153; bugfix on 0.2.4.8-alpha.

  o Build improvements:
    - Do not report status verbosely from autogen.sh unless the -v flag
      is specified. Fixes issue 4664. Patch from Onizuka.
    - Replace all calls to snprintf() outside of src/ext with
      tor_snprintf(). Also remove the #define to replace snprintf with
      _snprintf on Windows; they have different semantics, and all of
      our callers should be using tor_snprintf() anyway. Fixes bug 7304.
    - Try to detect if we are ever building on a platform where
      memset(...,0,...) does not set the value of a double to 0.0. Such
      platforms are permitted by the C standard, though in practice
      they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
      currently support them, but it's better to detect them and fail
      than to perform erroneously.

  o Removed features:
    - Stop exporting estimates of v2 and v3 directory traffic shares
      in extrainfo documents. They were unneeded and sometimes inaccurate.
      Also stop exporting any v2 directory request statistics. Resolves
      ticket 5823.
    - Drop support for detecting and warning about versions of Libevent
      before 1.3e. Nothing reasonable ships with them any longer;
      warning the user about them shouldn't be needed. Resolves ticket
      6826.

  o Code simplifications and refactoring:
    - Rename "isin" functions to "contains", for grammar. Resolves
      ticket 5285.
    - Rename Tor's logging function log() to tor_log(), to avoid conflicts
      with the natural logarithm function from the system libm. Resolves
      ticket 7599.


Changes in version 0.2.4.9-alpha - 2013-01-15
  Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
  work more robustly.

  o Major bugfixes:
    - Fix backward compatibility logic when receiving an embedded ntor
      handshake tunneled in a CREATE cell. This clears up the "Bug:
      couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
      on 0.2.4.8-alpha.


Changes in version 0.2.4.8-alpha - 2013-01-14
  Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
  risks, adds a new stronger and faster circuit handshake, and offers
  stronger and faster link encryption when both sides support it.

  o Major features:
    - Preliminary support for directory guards (proposal 207): when
      possible, clients now use their entry guards for non-anonymous
      directory requests. This can help prevent client enumeration. Note
      that this behavior only works when we have a usable consensus
      directory, and when options about what to download are more or less
      standard. In the future we should re-bootstrap from our guards,
      rather than re-bootstrapping from the preconfigured list of
      directory sources that ships with Tor. Resolves ticket 6526.
    - Tor relays and clients now support a better CREATE/EXTEND cell
      format, allowing the sender to specify multiple address, identity,
      and handshake types. Implements Robert Ransom's proposal 200;
      closes ticket 7199.

  o Major features (new circuit handshake):
    - Tor now supports a new circuit extension handshake designed by Ian
      Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
      circuit extension handshake, later called "TAP", was a bit slow
      (especially on the relay side), had a fragile security proof, and
      used weaker keys than we'd now prefer. The new circuit handshake
      uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
      function, making it significantly more secure than the older
      handshake, and significantly faster. Tor can use one of two built-in
      pure-C curve25519-donna implementations by Adam Langley, or it
      can link against the "nacl" library for a tuned version if present.

      The built-in version is very fast for 64-bit systems when building
      with GCC. The built-in 32-bit version is still faster than the
      old TAP protocol, but using libnacl is better on most such hosts.

      Clients don't currently use this protocol by default, since
      comparatively few clients support it so far. To try it, set
      UseNTorHandshake to 1.

      Implements proposal 216; closes ticket 7202.

  o Major features (better link encryption):
    - Relays can now enable the ECDHE TLS ciphersuites when available
      and appropriate. These ciphersuites let us negotiate forward-secure
      TLS secret keys more safely and more efficiently than with our
      previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
      public relays prefer the (faster) P224 group, and bridges prefer
      the (more common) P256 group; you can override this with the
      TLSECGroup option.

      Enabling these ciphers was a little tricky, since for a long time,
      clients had been claiming to support them without actually doing
      so, in order to foil fingerprinting. But with the client-side
      implementation of proposal 198 in 0.2.3.17-beta, clients can now
      match the ciphers from recent Firefox versions *and* list the
      ciphers they actually mean, so relays can believe such clients
      when they advertise ECDHE support in their TLS ClientHello messages.

      This feature requires clients running 0.2.3.17-beta or later,
      and requires both sides to be running OpenSSL 1.0.0 or later
      with ECC support. OpenSSL 1.0.1, with the compile-time option
      "enable-ec_nistp_64_gcc_128", is highly recommended.

      Implements the relay side of proposal 198; closes ticket 7200.

  o Major bugfixes:
    - Avoid crashing when, as a relay without IPv6-exit support, a
      client insists on getting an IPv6 address or nothing. Fixes bug
      7814; bugfix on 0.2.4.7-alpha.

  o Minor features:
    - Improve circuit build timeout handling for hidden services.
      In particular: adjust build timeouts more accurately depending
      upon the number of hop-RTTs that a particular circuit type
      undergoes. Additionally, launch intro circuits in parallel
      if they timeout, and take the first one to reply as valid.
    - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
      separate error codes; or at least, don't break for that reason.
      Fixes bug 7935. Reported by "oftc_must_be_destroyed".
    - Update to the January 2 2013 Maxmind GeoLite Country database.

  o Minor features (testing):
    - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
      (P-256) Diffie-Hellman handshakes to src/or/bench.
    - Add benchmark functions to test onion handshake performance.

  o Minor features (path bias detection):
    - Alter the Path Bias log messages to be more descriptive in terms
      of reporting timeouts and other statistics.
    - Create three levels of Path Bias log messages, as opposed to just
      two. These are configurable via consensus as well as via the torrc
      options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
      The default values are 0.70, 0.50, and 0.30 respectively.
    - Separate the log message levels from the decision to drop guards,
      which also is available via torrc option PathBiasDropGuards.
      PathBiasDropGuards still defaults to 0 (off).
    - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
      in combination with PathBiasExtremeRate.
    - Increase the default values for PathBiasScaleThreshold and
      PathBiasCircThreshold from (200, 20) to (300, 150).
    - Add in circuit usage accounting to path bias. If we try to use a
      built circuit but fail for any reason, it counts as path bias.
      Certain classes of circuits where the adversary gets to pick your
      destination node are exempt from this accounting. Usage accounting
      can be specifically disabled via consensus parameter or torrc.
    - Convert all internal path bias state to double-precision floating
      point, to avoid roundoff error and other issues.
    - Only record path bias information for circuits that have completed
      *two* hops. Assuming end-to-end tagging is the attack vector, this
      makes us more resilient to ambient circuit failure without any
      detection capability loss.

  o Minor bugfixes (log messages):
    - Rate-limit the "No circuits are opened. Relaxed timeout for a
      circuit with channel state open..." message to once per hour to
      keep it from filling the notice logs. Mitigates bug 7799 but does
      not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
    - Avoid spurious warnings when configuring multiple client ports of
      which only some are nonlocal. Previously, we had claimed that some
      were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
      0.2.3.3-alpha.

  o Code simplifications and refactoring:
    - Get rid of a couple of harmless clang warnings, where we compared
      enums to ints. These warnings are newly introduced in clang 3.2.
    - Split the onion.c file into separate modules for the onion queue
      and the different handshakes it supports.
    - Remove the marshalling/unmarshalling code for sending requests to
      cpuworkers over a socket, and instead just send structs. The
      recipient will always be the same Tor binary as the sender, so
      any encoding is overkill.


Changes in version 0.2.4.7-alpha - 2012-12-24
  Tor 0.2.4.7-alpha introduces a new approach to providing fallback
  directory mirrors for more robust bootstrapping; fixes more issues where
  clients with changing network conditions refuse to make any circuits;
  adds initial support for exiting to IPv6 addresses; resumes being able
  to update our GeoIP database, and includes the geoip6 file this time;
  turns off the client-side DNS cache by default due to privacy risks;
  and fixes a variety of other issues.

  o Major features (client resilience):
    - Add a new "FallbackDir" torrc option to use when we can't use
      a directory mirror from the consensus (either because we lack a
      consensus, or because they're all down). Currently, all authorities
      are fallbacks by default, and there are no other default fallbacks,
      but that will change. This option will allow us to give clients a
      longer list of servers to try to get a consensus from when first
      connecting to the Tor network, and thereby reduce load on the
      directory authorities. Implements proposal 206, "Preconfigured
      directory sources for bootstrapping". We also removed the old
      "FallbackNetworkstatus" option, since we never got it working well
      enough to use it. Closes bug 572.
    - If we have no circuits open, use a relaxed timeout (the
      95-percentile cutoff) until a circuit succeeds. This heuristic
      should allow Tor to succeed at building circuits even when the
      network connection drastically changes. Should help with bug 3443.

  o Major features (IPv6):
    - Relays can now exit to IPv6 addresses: make sure that you have IPv6
      connectivity, then set the IPv6Exit flag to 1. Also make sure your
      exit policy reads as you would like: the address * applies to all
      address families, whereas *4 is IPv4 address only, and *6 is IPv6
      addresses only. On the client side, you'll need to wait until the
      authorities have upgraded, wait for enough exits to support IPv6,
      apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
      ticket 5547, implements proposal 117 as revised in proposal 208.

      We DO NOT recommend that clients with actual anonymity needs start
      using IPv6 over Tor yet, since not enough exits support it yet.

  o Major features (geoip database):
    - Maxmind began labelling Tor relays as being in country "A1",
      which breaks by-country node selection inside Tor. Now we use a
      script to replace "A1" ("Anonymous Proxy") entries in our geoip
      file with real country codes. This script fixes about 90% of "A1"
      entries automatically and uses manual country code assignments to
      fix the remaining 10%. See src/config/README.geoip for details.
      Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
      Country database, as modified above.

  o Major bugfixes (client-side DNS):
    - Turn off the client-side DNS cache by default. Updating and using
      the DNS cache is now configurable on a per-client-port
      level. SOCKSPort, DNSPort, etc lines may now contain
      {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
      cache these types of DNS answers when we receive them from an
      exit node in response to an application request on this port, and
      {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
      cached DNS answers of these types, we shouldn't use them. It's
      potentially risky to use cached DNS answers at the client, since
      doing so can indicate to one exit what answers we've gotten
      for DNS lookups in the past. With IPv6, this becomes especially
      problematic. Using cached DNS answers for requests on the same
      circuit would present less linkability risk, since all traffic
      on a circuit is already linkable, but it would also provide
      little performance benefit: the exit node caches DNS replies
      too. Implements a simplified version of Proposal 205. Implements
      ticket 7570.

  o Major bugfixes (other):
    - Alter circuit build timeout measurement to start at the point
      where we begin the CREATE/CREATE_FAST step (as opposed to circuit
      initialization). This should make our timeout measurements more
      uniform. Previously, we were sometimes including ORconn setup time
      in our circuit build time measurements. Should resolve bug 3443.
    - Fix an assertion that could trigger in hibernate_go_dormant() when
      closing an or_connection_t: call channel_mark_for_close() rather
      than connection_mark_for_close(). Fixes bug 7267. Bugfix on
      0.2.4.4-alpha.
    - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
      7655; bugfix on 0.2.4.6-alpha.

  o Minor features:
    - Add a new torrc option "ServerTransportListenAddr" to let bridge
      operators select the address where their pluggable transports will
      listen for connections. Resolves ticket 7013.
    - Allow an optional $ before the node identity digest in the
      controller command GETINFO ns/id/<identity>, for consistency with
      md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
    - Log packaged cell fullness as part of the heartbeat message.
      Diagnosis to try to determine the extent of bug 7743.

  o Minor features (IPv6):
    - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
      prefer to hand out virtual IPv6 addresses, since there are more of
      them and we can't run out. To override this behavior and make IPv4
      addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
      or DNSPort you're using for resolving. Implements ticket 7571.
    - AutomapHostsOnResolve responses are now randomized, to avoid
      annoying situations where Tor is restarted and applications
      connect to the wrong addresses.
    - Never try more than 1000 times to pick a new virtual address when
      AutomapHostsOnResolve is set. That's good enough so long as we
      aren't close to handing out our entire virtual address space;
      if you're getting there, it's best to switch to IPv6 virtual
      addresses anyway.

  o Minor bugfixes:
    - The ADDRMAP command can no longer generate an ill-formed error
      code on a failed MAPADDRESS. It now says "internal" rather than
      an English sentence fragment with spaces in the middle. Bugfix on
      Tor 0.2.0.19-alpha.
    - Fix log messages and comments to avoid saying "GMT" when we mean
      "UTC". Fixes bug 6113.
    - Compile on win64 using mingw64. Fixes bug 7260; patches from
      "yayooo".
    - Fix a crash when debugging unit tests on Windows: deallocate a
      shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
      bugfix on 0.2.2.17-alpha. Reported by "ultramage".

  o Renamed options:
    - The DirServer option is now DirAuthority, for consistency with
      current naming patterns. You can still use the old DirServer form.

  o Code simplification and refactoring:
    - Move the client-side address-map/virtual-address/DNS-cache code
      out of connection_edge.c into a new addressmap.c module.
    - Remove unused code for parsing v1 directories and "running routers"
      documents. Fixes bug 6887.


Changes in version 0.2.3.25 - 2012-11-19
  The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
  Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
  Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
  programmer, and friend. Unstinting in his dedication to the cause of
  freedom, he inspired and helped many of us as we began our work on
  anonymity, and inspires us still. Please honor his memory by writing
  software to protect people's freedoms, and by helping others to do so.

  Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
  significantly reduced directory overhead (via microdescriptors),
  enormous crypto performance improvements for fast relays on new
  enough hardware, a new v3 TLS handshake protocol that can better
  resist fingerprinting, support for protocol obfuscation plugins (aka
  pluggable transports), better scalability for hidden services, IPv6
  support for bridges, performance improvements like allowing clients
  to skip the first round-trip on the circuit ("optimistic data") and
  refilling token buckets more often, a new "stream isolation" design
  to isolate different applications on different circuits, and many
  stability, security, and privacy fixes.

  o Major bugfixes:
    - Tor tries to wipe potentially sensitive data after using it, so
      that if some subsequent security failure exposes Tor's memory,
      the damage will be limited. But we had a bug where the compiler
      was eliminating these wipe operations when it decided that the
      memory was no longer visible to a (correctly running) program,
      hence defeating our attempt at defense in depth. We fix that
      by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
      is unlikely to optimize away. Future versions of Tor may use
      a less ridiculously heavy approach for this. Fixes bug 7352.
      Reported in an article by Andrey Karpov.

  o Minor bugfixes:
    - Fix a harmless bug when opting against publishing a relay descriptor
      because DisableNetwork is set. Fixes bug 7464; bugfix on
      0.2.3.9-alpha.


Changes in version 0.2.4.6-alpha - 2012-11-13
  Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
  makes our defense-in-depth memory wiping more reliable, and begins to
  count IPv6 addresses in bridge statistics,

  o Major bugfixes:
    - Fix an assertion failure that could occur when closing a connection
      with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
      Tor 0.2.4.4-alpha.
    - Tor tries to wipe potentially sensitive data after using it, so
      that if some subsequent security failure exposes Tor's memory,
      the damage will be limited. But we had a bug where the compiler
      was eliminating these wipe operations when it decided that the
      memory was no longer visible to a (correctly running) program,
      hence defeating our attempt at defense in depth. We fix that
      by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
      is unlikely to optimize away. Future versions of Tor may use
      a less ridiculously heavy approach for this. Fixes bug 7352.
      Reported in an article by Andrey Karpov.

  o Minor features:
    - Add GeoIP database for IPv6 addresses. The new config option
      is GeoIPv6File.
    - Bridge statistics now count bridge clients connecting over IPv6:
      bridge statistics files now list "bridge-ip-versions" and
      extra-info documents list "geoip6-db-digest". The control protocol
      "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
      implementation by "shkoo", addressing ticket 5055.

  o Minor bugfixes:
    - Warn when we are binding low ports when hibernation is enabled;
      previously we had warned when we were _advertising_ low ports with
      hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
    - Fix a harmless bug when opting against publishing a relay descriptor
      because DisableNetwork is set. Fixes bug 7464; bugfix on
      0.2.3.9-alpha.
    - Add warning message when a managed proxy dies during configuration.
      Fixes bug 7195; bugfix on 0.2.4.2-alpha.
    - Fix a linking error when building tor-fw-helper without miniupnp.
      Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
    - Check for closing an or_connection_t without going through correct
      channel functions; emit a warning and then call
      connection_or_close_for_error() so we don't assert as in bugs 7212
      and 7267.
    - Compile correctly on compilers without C99 designated initializer
      support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
    - Avoid a possible assert that can occur when channel_send_destroy() is
      called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
      or CHANNEL_STATE_ERROR when the Tor process is resumed after being
      blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
    - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
      Fixes bug 7422; bugfix on 0.2.4.4-alpha.

  o Code simplification and refactoring:
    - Start using OpenBSD's implementation of queue.h, so that we don't
      need to hand-roll our own pointer and list structures whenever we
      need them. (We can't rely on a sys/queue.h, since some operating
      systems don't have them, and the ones that do have them don't all
      present the same extensions.)


Changes in version 0.2.4.5-alpha - 2012-10-25
  Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
  two important security vulnerabilities that could lead to remotely
  triggerable relay crashes, fix a major bug that was preventing clients
  from choosing suitable exit nodes, and refactor some of our code.

  o Major bugfixes (security, also in 0.2.3.24-rc):
    - Fix a group of remotely triggerable assertion failures related to
      incorrect link protocol negotiation. Found, diagnosed, and fixed
      by "some guy from France". Fix for CVE-2012-2250; bugfix on
      0.2.3.6-alpha.
    - Fix a denial of service attack by which any directory authority
      could crash all the others, or by which a single v2 directory
      authority could crash everybody downloading v2 directory
      information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.

  o Major bugfixes (also in 0.2.3.24-rc):
    - When parsing exit policy summaries from microdescriptors, we had
      previously been ignoring the last character in each one, so that
      "accept 80,443,8080" would be treated by clients as indicating
      a node that allows access to ports 80, 443, and 808. That would
      lead to clients attempting connections that could never work,
      and ignoring exit nodes that would support their connections. Now
      clients parse these exit policy summaries correctly. Fixes bug 7192;
      bugfix on 0.2.3.1-alpha.

  o Minor bugfixes (also in 0.2.3.24-rc):
    - Clients now consider the ClientRejectInternalAddresses config option
      when using a microdescriptor consensus stanza to decide whether
      an exit relay would allow exiting to an internal address. Fixes
      bug 7190; bugfix on 0.2.3.1-alpha.

  o Minor bugfixes:
    - Only disable TLS session ticket support when running as a TLS
      server. Now clients will blend better with regular Firefox
      connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.

  o Code simplification and refactoring:
    - Start using OpenBSD's implementation of queue.h (originally by
      Niels Provos).
    - Move the entry node code from circuitbuild.c to its own file.
    - Move the circuit build timeout tracking code from circuitbuild.c
      to its own file.


Changes in version 0.2.3.24-rc - 2012-10-25
  Tor 0.2.3.24-rc fixes two important security vulnerabilities that
  could lead to remotely triggerable relay crashes, and fixes
  a major bug that was preventing clients from choosing suitable exit
  nodes.

  o Major bugfixes (security):
    - Fix a group of remotely triggerable assertion failures related to
      incorrect link protocol negotiation. Found, diagnosed, and fixed
      by "some guy from France". Fix for CVE-2012-2250; bugfix on
      0.2.3.6-alpha.
    - Fix a denial of service attack by which any directory authority
      could crash all the others, or by which a single v2 directory
      authority could crash everybody downloading v2 directory
      information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.

  o Major bugfixes:
    - When parsing exit policy summaries from microdescriptors, we had
      previously been ignoring the last character in each one, so that
      "accept 80,443,8080" would be treated by clients as indicating
      a node that allows access to ports 80, 443, and 808. That would
      lead to clients attempting connections that could never work,
      and ignoring exit nodes that would support their connections. Now
      clients parse these exit policy summaries correctly. Fixes bug 7192;
      bugfix on 0.2.3.1-alpha.

  o Minor bugfixes:
    - Clients now consider the ClientRejectInternalAddresses config option
      when using a microdescriptor consensus stanza to decide whether
      an exit relay would allow exiting to an internal address. Fixes
      bug 7190; bugfix on 0.2.3.1-alpha.


Changes in version 0.2.4.4-alpha - 2012-10-20
  Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
  vulnerability introduced by a change in OpenSSL, fixes a remotely
  triggerable assert, and adds new channel_t and circuitmux_t abstractions
  that will make it easier to test new connection transport and cell
  scheduling algorithms.

  o New directory authorities (also in 0.2.3.23-rc):
    - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
      authority. Closes ticket 5749.

  o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
    - Disable TLS session tickets. OpenSSL's implementation was giving
      our TLS session keys the lifetime of our TLS context objects, when
      perfect forward secrecy would want us to discard anything that
      could decrypt a link connection as soon as the link connection
      was closed. Fixes bug 7139; bugfix on all versions of Tor linked
      against OpenSSL 1.0.0 or later. Found by Florent Daignière.
    - Discard extraneous renegotiation attempts once the V3 link
      protocol has been initiated. Failure to do so left us open to
      a remotely triggerable assertion failure. Fixes CVE-2012-2249;
      bugfix on 0.2.3.6-alpha. Reported by "some guy from France".

  o Internal abstraction features:
    - Introduce new channel_t abstraction between circuits and
      or_connection_t to allow for implementing alternate OR-to-OR
      transports. A channel_t is an abstract object which can either be a
      cell-bearing channel, which is responsible for authenticating and
      handshaking with the remote OR and transmitting cells to and from
      it, or a listening channel, which spawns new cell-bearing channels
      at the request of remote ORs. Implements part of ticket 6465.
    - Also new is the channel_tls_t subclass of channel_t, adapting it
      to the existing or_connection_t code. The V2/V3 protocol handshaking
      code which formerly resided in command.c has been moved below the
      channel_t abstraction layer and may be found in channeltls.c now.
      Implements the rest of ticket 6465.
    - Introduce new circuitmux_t storing the queue of circuits for
      a channel; this encapsulates and abstracts the queue logic and
      circuit selection policy, and allows the latter to be overridden
      easily by switching out a policy object. The existing EWMA behavior
      is now implemented as a circuitmux_policy_t. Resolves ticket 6816.

  o Required libraries:
    - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
      strongly recommended.

  o Minor features:
    - Warn users who run hidden services on a Tor client with
      UseEntryGuards disabled that their hidden services will be
      vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
      attack which motivated Tor to support entry guards in the first
      place). Resolves ticket 6889.
    - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
      dhill. Resolves ticket 6982.
    - Option OutboundBindAddress can be specified multiple times and
      accepts IPv6 addresses. Resolves ticket 6876.

  o Minor bugfixes (also in 0.2.3.23-rc):
    - Don't serve or accept v2 hidden service descriptors over a
      relay's DirPort. It's never correct to do so, and disabling it
      might make it more annoying to exploit any bugs that turn up in the
      descriptor-parsing code. Fixes bug 7149.
    - Fix two cases in src/or/transports.c where we were calling
      fmt_addr() twice in a parameter list. Bug found by David
      Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
    - Fix memory leaks whenever we logged any message about the "path
      bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
    - When relays refuse a "create" cell because their queue of pending
      create cells is too big (typically because their cpu can't keep up
      with the arrival rate), send back reason "resource limit" rather
      than reason "internal", so network measurement scripts can get a
      more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.

  o Minor bugfixes:
    - Command-line option "--version" implies "--quiet". Fixes bug 6997.
    - Free some more still-in-use memory at exit, to make hunting for
      memory leaks easier. Resolves bug 7029.
    - When a Tor client gets a "truncated" relay cell, the first byte of
      its payload specifies why the circuit was truncated. We were
      ignoring this 'reason' byte when tearing down the circuit, resulting
      in the controller not being told why the circuit closed. Now we
      pass the reason from the truncated cell to the controller. Bugfix
      on 0.1.2.3-alpha; fixes bug 7039.
    - Downgrade "Failed to hand off onionskin" messages to "debug"
      severity, since they're typically redundant with the "Your computer
      is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
    - Make clients running with IPv6 bridges connect over IPv6 again,
      even without setting new config options ClientUseIPv6 and
      ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
    - Use square brackets around IPv6 addresses in numerous places
      that needed them, including log messages, HTTPS CONNECT proxy
      requests, TransportProxy statefile entries, and pluggable transport
      extra-info lines. Fixes bug 7011; patch by David Fifield.

  o Code refactoring and cleanup:
    - Source files taken from other packages now reside in src/ext;
      previously they were scattered around the rest of Tor.
    - Avoid use of reserved identifiers in our C code. The C standard
      doesn't like us declaring anything that starts with an
      underscore, so let's knock it off before we get in trouble. Fix
      for bug 1031; bugfix on the first Tor commit.


Changes in version 0.2.3.23-rc - 2012-10-20
  Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
  vulnerability introduced by a change in OpenSSL, and fixes a variety
  of smaller bugs in preparation for the release.

  o New directory authorities:
    - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
      authority. Closes ticket 5749.

  o Major bugfixes (security/privacy):
    - Disable TLS session tickets. OpenSSL's implementation was giving
      our TLS session keys the lifetime of our TLS context objects, when
      perfect forward secrecy would want us to discard anything that
      could decrypt a link connection as soon as the link connection
      was closed. Fixes bug 7139; bugfix on all versions of Tor linked
      against OpenSSL 1.0.0 or later. Found by Florent Daignière.
    - Discard extraneous renegotiation attempts once the V3 link
      protocol has been initiated. Failure to do so left us open to
      a remotely triggerable assertion failure. Fixes CVE-2012-2249;
      bugfix on 0.2.3.6-alpha. Reported by "some guy from France".

  o Major bugfixes:
    - Fix a possible crash bug when checking for deactivated circuits
      in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
      bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.

  o Minor bugfixes (on 0.2.3.x):
    - Fix two cases in src/or/transports.c where we were calling
      fmt_addr() twice in a parameter list. Bug found by David
      Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
    - Convert an assert in the pathbias code to a log message. The assert
      appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
      bugfix on 0.2.3.17-beta.
    - Fix memory leaks whenever we logged any message about the "path
      bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.

  o Minor bugfixes (on 0.2.2.x and earlier):
    - Don't serve or accept v2 hidden service descriptors over a relay's
      DirPort. It's never correct to do so, and disabling it might
      make it more annoying to exploit any bugs that turn up in the
      descriptor-parsing code. Fixes bug 7149.
    - When relays refuse a "create" cell because their queue of pending
      create cells is too big (typically because their cpu can't keep up
      with the arrival rate), send back reason "resource limit" rather
      than reason "internal", so network measurement scripts can get a
      more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
    - Correct file sizes when reading binary files on Cygwin, to avoid
      a bug where Tor would fail to read its state file. Fixes bug 6844;
      bugfix on 0.1.2.7-alpha.
    - Avoid undefined behaviour when parsing the list of supported
      rendezvous/introduction protocols in a hidden service descriptor.
      Previously, Tor would have confused (as-yet-unused) protocol version
      numbers greater than 32 with lower ones on many platforms. Fixes
      bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.

  o Documentation fixes:
    - Clarify that hidden services are TCP only. Fixes bug 6024.


Changes in version 0.2.4.3-alpha - 2012-09-22
  Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
  assertion, resumes letting relays test reachability of their DirPort,
  and cleans up a bunch of smaller bugs.

  o Security fixes:
    - Fix an assertion failure in tor_timegm() that could be triggered
      by a badly formatted directory object. Bug found by fuzzing with
      Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.

  o Major bugfixes:
    - Fix a possible crash bug when checking for deactivated circuits
      in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
      bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
    - Allow routers to detect that their own DirPorts are running. When
      we removed support for versions_supports_begindir, we also
      accidentally removed the mechanism we used to self-test our
      DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
      bugfix on 0.2.4.2-alpha.

  o Security features:
    - Switch to a completely time-invariant approach for picking nodes
      weighted by bandwidth. Our old approach would run through the
      part of the loop after it had made its choice slightly slower
      than it ran through the part of the loop before it had made its
      choice. Addresses ticket 6538.
    - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
      by tor2web clients allows hidden services to identify tor2web
      clients through their repeated selection of the same rendezvous
      and introduction point circuit endpoints (their guards). Resolves
      ticket 6888.

  o Minor features:
    - Enable Tor to read configuration, state, and key information from
      a FIFO. Previously Tor would only read from files with a positive
      stat.st_size. Code from meejah; fixes bug 6044.

  o Minor bugfixes:
    - Correct file sizes when reading binary files on Cygwin, to avoid
      a bug where Tor would fail to read its state file. Fixes bug 6844;
      bugfix on 0.1.2.7-alpha.
    - Correctly handle votes with more than 31 flags. Fixes bug 6853;
      bugfix on 0.2.0.3-alpha.
    - When complaining about a client port on a public address, log
      which address we're complaining about. Fixes bug 4020; bugfix on
      0.2.3.3-alpha. Patch by Tom Fitzhenry.
    - Convert an assert in the pathbias code to a log message. The assert
      appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
      bugfix on 0.2.3.17-beta.
    - Our new buildsystem was overzealous about rebuilding manpages: it
      would rebuild them all whenever any one of them changed. Now our
      dependency checking should be correct. Fixes bug 6843; bugfix on
      0.2.4.1-alpha.
    - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
      is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
    - Correct log printout about which address family is preferred
      when connecting to a bridge with both an IPv4 and IPv6 OR port.
      Fixes bug 6884; bugfix on 0.2.4.1-alpha.

  o Minor bugfixes (code cleanliness):
    - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
      with large values. This situation was untriggered, but nevertheless
      incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
    - Reject consensus votes with more than 64 known-flags. We aren't even
      close to that limit yet, and our code doesn't handle it correctly.
      Fixes bug 6833; bugfix on 0.2.0.1-alpha.
    - Avoid undefined behaviour when parsing the list of supported
      rendezvous/introduction protocols in a hidden service descriptor.
      Previously, Tor would have confused (as-yet-unused) protocol version
      numbers greater than 32 with lower ones on many platforms. Fixes
      bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
    - Fix handling of rendezvous client authorization types over 8.
      Fixes bug 6861; bugfix on 0.2.1.5-alpha.
    - Fix building with older versions of GCC (2.95, for one) that don't
      like preprocessor directives inside macro arguments. Found by
      grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
    - Switch weighted node selection rule from using a list of doubles
      to using a list of int64_t. This change should make the process
      slightly easier to debug and maintain. Needed to finish ticket 6538.

  o Code simplification and refactoring:
    - Move the generic "config" code into a new file, and have "config.c"
      hold only torrc- and state-related code. Resolves ticket 6823.
    - Move the core of our "choose a weighted element at random" logic
      into its own function, and give it unit tests. Now the logic is
      testable, and a little less fragile too.
    - Removed the testing_since field of node_t, which hasn't been used
      for anything since 0.2.0.9-alpha.

  o Documentation fixes:
    - Clarify that hidden services are TCP only. Fixes bug 6024.
    - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
      0.2.3.14-alpha.


Changes in version 0.2.3.22-rc - 2012-09-11
  Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
  assertion.

  o Security fixes:
    - Fix an assertion failure in tor_timegm() that could be triggered
      by a badly formatted directory object. Bug found by fuzzing with
      Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.

  o Minor bugfixes:
    - Avoid segfault when starting up having run with an extremely old
      version of Tor and parsing its state file. Fixes bug 6801; bugfix
      on 0.2.2.23-alpha.


Changes in version 0.2.2.39 - 2012-09-11
  Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
  assertions.

  o Security fixes:
    - Fix an assertion failure in tor_timegm() that could be triggered
      by a badly formatted directory object. Bug found by fuzzing with
      Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
    - Do not crash when comparing an address with port value 0 to an
      address policy. This bug could have been used to cause a remote
      assertion failure by or against directory authorities, or to
      allow some applications to crash clients. Fixes bug 6690; bugfix
      on 0.2.1.10-alpha.


Changes in version 0.2.4.2-alpha - 2012-09-10
  Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
  raises the default rate limiting even more, and makes the bootstrapping
  log messages less noisy.

  o Major features:
    - Automatically forward the TCP ports of pluggable transport
      proxies using tor-fw-helper if PortForwarding is enabled. Implements
      ticket 4567.

  o Major bugfixes:
    - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
      to 1GB/1GB. The previous defaults were intended to be "basically
      infinite", but it turns out they're now limiting our 100mbit+
      relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
      last time we raised it).

  o Minor features:
    - Detect when we're running with a version of OpenSSL other than the
      one we compiled with. This has occasionally given people hard-to-
      track-down errors.
    - Log fewer lines at level "notice" about our OpenSSL and Libevent
      versions and capabilities when everything is going right. Resolves
      part of ticket 6736.
    - Directory authorities no long accept descriptors for any version of
      Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
      These versions are insecure, unsupported, or both. Implements
      ticket 6789.

  o Minor bugfixes:
    - Rename the (internal-use-only) UsingTestingNetworkDefaults option
      to start with a triple-underscore so the controller won't touch it.
      Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
    - Avoid segfault when starting up having run with an extremely old
      version of Tor and parsing its state file. Fixes bug 6801; bugfix
      on 0.2.2.23-alpha.
    - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
      so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
    - Don't follow the NULL pointer if microdescriptor generation fails.
      (This does not appear to be triggerable, but it's best to be safe.)
      Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
    - Fix mis-declared dependencies on src/common/crypto.c and
      src/or/tor_main.c that could break out-of-tree builds under some
      circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
    - Avoid a warning when building common_sha1.i out of tree. Fixes bug
      6778; bugfix on 0.2.4.1-alpha.
    - Fix a harmless (in this case) build warning for implicitly
      converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.

  o Removed features:
    - Now that all versions before 0.2.2.x are disallowed, we no longer
      need to work around their missing features. Thus we can remove a
      bunch of compatibility code.

  o Code refactoring:
    - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
      TCP ports to forward. In the past it only accepted two ports:
      the ORPort and the DirPort.


Changes in version 0.2.4.1-alpha - 2012-09-05
  Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
  bridgedb; lets relays use IPv6 addresses and directory authorities
  advertise them; and switches to a cleaner build interface.

  This is the first alpha release in a new series, so expect there to
  be bugs. Users who would rather test out a more stable branch should
  stay with 0.2.3.x for now.

  o Major features (bridges):
    - Bridges now report the pluggable transports they support to the
      bridge authority, so it can pass the supported transports on to
      bridgedb and/or eventually do reachability testing. Implements
      ticket 3589.

  o Major features (IPv6):
    - Bridge authorities now accept IPv6 bridge addresses and include
      them in network status documents. Implements ticket 5534.
    - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
      IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
      to happen. Implements ticket 5535.
    - All kind of relays, not just bridges, can now advertise an IPv6
      OR port. Implements ticket 6362.
    - Directory authorities vote on IPv6 OR ports using the new consensus
      method 14. Implements ticket 6363.

  o Major features (build):
    - Switch to a nonrecursive Makefile structure. Now instead of each
      Makefile.am invoking other Makefile.am's, there is a master
      Makefile.am that includes the others. This change makes our build
      process slightly more maintainable, and improves parallelism for
      building with make -j. Original patch by Stewart Smith; various
      fixes by Jim Meyering.
    - Where available, we now use automake's "silent" make rules by
      default, so that warnings are easier to spot. You can get the old
      behavior with "make V=1". Patch by Stewart Smith for ticket 6522.

  o Minor features (code security and spec conformance):
    - Clear keys and key-derived material left on the stack in
      rendservice.c and rendclient.c. Check return value of
      crypto_pk_write_private_key_to_string() in rend_service_load_keys().
      These fixes should make us more forward-secure against cold-boot
      attacks and the like. Fixes bug 2385.
    - Reject EXTEND cells sent to nonexistent streams. According to the
      spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
      we were only checking for stream IDs that were currently in use.
      Found while hunting for more instances of bug 6271. Bugfix on
      0.0.2pre8, which introduced incremental circuit construction.

  o Minor features (streamlining);
    - No longer include the "opt" prefix when generating routerinfos
      or v2 directories: it has been needless since Tor 0.1.2. Closes
      ticket 5124.
    - Remove some now-needless code that tried to aggressively flush
      OR connections as data was added to them. Since 0.2.0.1-alpha, our
      cell queue logic has saved us from the failure mode that this code
      was supposed to prevent. Removing this code will limit the number
      of baroque control flow paths through Tor's network logic. Reported
      pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.

  o Minor features (controller):
    - Add a "GETINFO signal/names" control port command. Implements
      ticket 3842.
    - Provide default values for all options via "GETINFO config/defaults".
      Implements ticket 4971.

  o Minor features (IPv6):
    - New config option "AuthDirHasIPv6Connectivity 1" that directory
      authorities should set if they have IPv6 connectivity and want to
      do reachability tests for IPv6 relays. Implements feature 5974.
    - A relay with an IPv6 OR port now sends that address in NETINFO
      cells (in addition to its other address). Implements ticket 6364.

  o Minor features (log messages):
    - Omit the first heartbeat log message, because it never has anything
      useful to say, and it clutters up the bootstrapping messages.
      Resolves ticket 6758.
    - Don't log about reloading the microdescriptor cache at startup. Our
      bootstrap warnings are supposed to tell the user when there's a
      problem, and our bootstrap notices say when there isn't. Resolves
      ticket 6759; bugfix on 0.2.2.6-alpha.
    - Don't log "I learned some more directory information" when we're
      reading cached directory information. Reserve it for when new
      directory information arrives in response to a fetch. Resolves
      ticket 6760.
    - Prevent rounding error in path bias counts when scaling
      them down, and use the correct scale factor default. Also demote
      some path bias related log messages down a level and make others
      less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
    - We no longer warn so much when generating manpages from their
      asciidoc source.

  o Code simplifications and refactoring:
    - Enhance our internal sscanf replacement so that we can eliminate
      the last remaining uses of the system sscanf. (Though those uses
      of sscanf were safe, sscanf itself is generally error prone, so
      we want to eliminate when we can.) Fixes ticket 4195 and Coverity
      CID 448.
    - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
    - Move last_reachable and testing_since from routerinfo_t to node_t.
      Implements ticket 5529.
    - Add replaycache_t structure, functions and unit tests, then refactor
      rend_service_introduce() to be more clear to read, improve, debug,
      and test. Resolves bug 6177.
    - Finally remove support for malloc_good_size and malloc_usable_size.
      We had hoped that these functions would let us eke a little more
      memory out of our malloc implementation. Unfortunately, the only
      implementations that provided these functions are also ones that
      are already efficient about not overallocation: they never got us
      more than 7 or so bytes per allocation. Removing them saves us a
      little code complexity and a nontrivial amount of build complexity.

  o New requirements:
    - Tor maintainers now require Automake version 1.9 or later to build
      Tor from the Git repository. (Automake is not required when building
      from a source distribution.)


Changes in version 0.2.3.21-rc - 2012-09-05
  Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
  series. It fixes a trio of potential security bugs, fixes a bug where
  we were leaving some of the fast relays out of the microdescriptor
  consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
  and cleans up other smaller issues.

  o Major bugfixes (security):
    - Tear down the circuit if we get an unexpected SENDME cell. Clients
      could use this trick to make their circuits receive cells faster
      than our flow control would have allowed, or to gum up the network,
      or possibly to do targeted memory denial-of-service attacks on
      entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
      from July 2002, before the release of Tor 0.0.0. We had committed
      this patch previously, but we had to revert it because of bug 6271.
      Now that 6271 is fixed, this patch appears to work.
    - Reject any attempt to extend to an internal address. Without
      this fix, a router could be used to probe addresses on an internal
      network to see whether they were accepting connections. Fixes bug
      6710; bugfix on 0.0.8pre1.
    - Do not crash when comparing an address with port value 0 to an
      address policy. This bug could have been used to cause a remote
      assertion failure by or against directory authorities, or to
      allow some applications to crash clients. Fixes bug 6690; bugfix
      on 0.2.1.10-alpha.

  o Major bugfixes:
    - Remove the upper bound on microdescriptor length. We were hitting
      the limit for routers with complex exit policies or family
      declarations, causing clients to not use them. Fixes the first
      piece of bug 6404; fix on 0.2.2.6-alpha.
    - Detect "ORPort 0" as meaning, uniformly, that we're not running
      as a relay. Previously, some of our code would treat the presence
      of any ORPort line as meaning that we should act like a relay,
      even though our new listener code would correctly not open any
      ORPorts for ORPort 0. Similar bugs in other Port options are also
      fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.

  o Minor bugfixes:
    - Avoid a pair of double-free and use-after-mark bugs that can
      occur with certain timings in canceled and re-received DNS
      requests. Fixes bug 6472; bugfix on 0.0.7rc1.
    - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
      Fixes bug 6379. Bugfix on 0.2.0.20-rc.
    - Allow one-hop directory fetching circuits the full "circuit build
      timeout" period, rather than just half of it, before failing them
      and marking the relay down. This fix should help reduce cases where
      clients declare relays (or worse, bridges) unreachable because
      the TLS handshake takes a few seconds to complete. Fixes bug 6743;
      bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
      30 seconds.
    - Authorities no longer include any router in their microdescriptor
      consensuses for which they couldn't generate or agree on a
      microdescriptor. Fixes the second piece of bug 6404; fix on
      0.2.2.6-alpha.
    - Detect and reject attempts to specify both "FooPort" and
      "FooPort 0" in the same configuration domain. (It's still okay
      to have a FooPort in your configuration file, and use "FooPort 0"
      on the command line to disable it.) Fixes the second half of bug
      6507; bugfix on 0.2.3.3-alpha.
    - Make wildcarded addresses (that is, ones beginning with "*.") work
      when provided via the controller's MapAddress command. Previously,
      they were accepted, but we never actually noticed that they were
      wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
    - Avoid crashing on a malformed state file where EntryGuardPathBias
      precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
    - Add a (probably redundant) memory clear between iterations of
      the router status voting loop, to prevent future coding errors
      where data might leak between iterations of the loop. Resolves
      ticket 6514.

  o Minor bugfixes (log messages):
    - Downgrade "set buildtimeout to low value" messages to "info"
      severity; they were never an actual problem, there was never
      anything reasonable to do about them, and they tended to spam logs
      from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
    - Downgrade path-bias warning messages to "info". We'll try to get
      them working better in 0.2.4. Add internal circuit construction
      state to protect against the noisy warn message "Unexpectedly high
      circuit_successes". Also add some additional rate-limited notice
      messages to help determine the root cause of the warn. Fixes bug
      6475. Bugfix against 0.2.3.17-beta.
    - Move log message when unable to find a microdesc in a routerstatus
      entry to parse time. Previously we'd spam this warning every time
      we tried to figure out which microdescriptors to download. Fixes
      the third piece of bug 6404; fix on 0.2.3.18-rc.

  o Minor features:
    - Consider new, removed or changed IPv6 OR ports a non-cosmetic
      change when the authority is deciding whether to accept a newly
      uploaded descriptor. Implements ticket 6423.
    - Add missing documentation for consensus and microdesc files.
      Resolves ticket 6732.


Changes in version 0.2.2.38 - 2012-08-12
  Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
  attack that could in theory leak path information.

  o Security fixes:
    - Avoid an uninitialized memory read when reading a vote or consensus
      document that has an unrecognized flavor name. This read could
      lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
    - Try to leak less information about what relays a client is
      choosing to a side-channel attacker. Previously, a Tor client would
      stop iterating through the list of available relays as soon as it
      had chosen one, thus finishing a little earlier when it picked
      a router earlier in the list. If an attacker can recover this
      timing information (nontrivial but not proven to be impossible),
      they could learn some coarse-grained information about which relays
      a client was picking (middle nodes in particular are likelier to
      be affected than exits). The timing attack might be mitigated by
      other factors (see bug 6537 for some discussion), but it's best
      not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.


Changes in version 0.2.3.20-rc - 2012-08-05
  Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
  series. It fixes a pair of code security bugs and a potential anonymity
  issue, updates our RPM spec files, and cleans up other smaller issues.

  o Security fixes:
    - Avoid read-from-freed-memory and double-free bugs that could occur
      when a DNS request fails while launching it. Fixes bug 6480;
      bugfix on 0.2.0.1-alpha.
    - Avoid an uninitialized memory read when reading a vote or consensus
      document that has an unrecognized flavor name. This read could
      lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
    - Try to leak less information about what relays a client is
      choosing to a side-channel attacker. Previously, a Tor client would
      stop iterating through the list of available relays as soon as it
      had chosen one, thus finishing a little earlier when it picked
      a router earlier in the list. If an attacker can recover this
      timing information (nontrivial but not proven to be impossible),
      they could learn some coarse-grained information about which relays
      a client was picking (middle nodes in particular are likelier to
      be affected than exits). The timing attack might be mitigated by
      other factors (see bug 6537 for some discussion), but it's best
      not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.

  o Minor features:
    - Try to make the warning when giving an obsolete SOCKSListenAddress
      a little more useful.
    - Terminate active server managed proxies if Tor stops being a
      relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
    - Provide a better error message about possible OSX Asciidoc failure
      reasons. Fixes bug 6436.
    - Warn when Tor is configured to use accounting in a way that can
      link a hidden service to some other hidden service or public
      address. Resolves ticket 6490.

  o Minor bugfixes:
    - Check return value of fputs() when writing authority certificate
      file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
    - Ignore ServerTransportPlugin lines when Tor is not configured as
      a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
    - When disabling guards for having too high a proportion of failed
      circuits, make sure to look at each guard. Fixes bug 6397; bugfix
      on 0.2.3.17-beta.

  o Packaging (RPM):
    - Update our default RPM spec files to work with mock and rpmbuild
      on RHEL/Fedora. They have an updated set of dependencies and
      conflicts, a fix for an ancient typo when creating the "_tor"
      user, and better instructions. Thanks to Ondrej Mikle for the
      patch series. Fixes bug 6043.

  o Testing:
    - Make it possible to set the TestingTorNetwork configuration
      option using AlternateDirAuthority and AlternateBridgeAuthority
      as an alternative to setting DirServer. Addresses ticket 6377.

  o Documentation:
    - Clarify the documentation for the Alternate*Authority options.
      Fixes bug 6387.
    - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.

  o Code simplification and refactoring:
    - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
      10 lines. Also, don't nest them. Doing so in the past has
      led to hard-to-debug code. The new style is to use the
      SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.


Changes in version 0.2.3.19-rc - 2012-07-06
  Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
  series. It fixes the compile on Windows, reverts to a GeoIP database
  that isn't as broken, and fixes a flow control bug that has been around
  since the beginning of Tor.

  o Major bugfixes:
    - Fix a bug handling SENDME cells on nonexistent streams that could
      result in bizarre window values. Report and patch contributed
      pseudonymously. Fixes part of bug 6271. This bug was introduced
      before the first Tor release, in svn commit r152.
    - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
      June 2012 database, Maxmind marked many Tor relays as country "A1",
      which will cause risky behavior for clients that set EntryNodes
      or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
    - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
      on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.

  o Minor bugfixes:
    - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
      bugfix on 0.2.1.10-alpha.


Changes in version 0.2.3.18-rc - 2012-06-28
  Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
  series. It fixes a few smaller bugs, but generally appears stable.
  Please test it and let us know whether it is!

  o Major bugfixes:
    - Allow wildcarded mapaddress targets to be specified on the
      controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
    - Make our linker option detection code more robust against linkers
      such as on FreeBSD 8, where a bad combination of options completes
      successfully but makes an unrunnable binary. Fixes bug 6173;
      bugfix on 0.2.3.17-beta.

  o Minor bugfixes (on 0.2.2.x and earlier):
    - Avoid a false positive in the util/threads unit test by increasing
      the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
    - Replace "Sending publish request" log messages with "Launching
      upload", so that they no longer confusingly imply that we're
      sending something to a directory we might not even be connected
      to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
    - Make sure to set *socket_error in all error cases in
      connection_connect(), so it can't produce a warning about
      errno being zero from errno_to_orconn_end_reason(). Bugfix on
      0.2.1.1-alpha; resolves ticket 6028.
    - Downgrade "Got a certificate, but we already have it" log messages
      from warning to info, except when we're a dirauth. Fixes bug 5238;
      bugfix on 0.2.1.7-alpha.
    - When checking for requested signatures on the latest consensus
      before serving it to a client, make sure to check the right
      consensus flavor. Bugfix on 0.2.2.6-alpha.
    - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
      Fixes bug 5932; bugfix on 0.2.2.7-alpha.

  o Minor bugfixes (on 0.2.3.x):
    - Make format_helper_exit_status() avoid unnecessary space padding
      and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
      on 0.2.3.1-alpha.
    - Downgrade a message about cleaning the microdescriptor cache to
      "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
    - Log a BUG message at severity INFO if we have a networkstatus with
      a missing entry for some microdescriptor. Continues on a patch
      to 0.2.3.2-alpha.
    - Improve the log message when a managed proxy fails to launch. Fixes
      bug 5099; bugfix on 0.2.3.6-alpha.
    - Don't do DNS lookups when parsing corrupted managed proxy protocol
      messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
    - When formatting wildcarded address mappings for the controller,
      be sure to include "*." as appropriate. Partially fixes bug 6244;
      bugfix on 0.2.3.9-alpha.
    - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
      Bugfix on 0.2.3.13-alpha.
    - Stop logging messages about running with circuit timeout learning
      enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
    - Disable a spurious warning about reading on a marked and flushing
      connection. We shouldn't be doing that, but apparently we
      sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
    - Fix a bug that stopped AllowDotExit from working on addresses
      that had an entry in the DNS cache. Fixes bug 6211; bugfix on
      0.2.3.17-beta.

  o Code simplification, refactoring, unit tests:
    - Move tor_gettimeofday_cached() into compat_libevent.c, and use
      Libevent's notion of cached time when possible.
    - Remove duplicate code for invoking getrlimit() from control.c.
    - Add a unit test for the environment_variable_names_equal function.

  o Documentation:
    - Document the --defaults-torrc option, and the new (in 0.2.3)
      semantics for overriding, extending, and clearing lists of
      options. Closes bug 4748.


Changes in version 0.2.3.17-beta - 2012-06-15
  Tor 0.2.3.17-beta enables compiler and linker hardening by default,
  gets our TLS handshake back on track for being able to blend in with
  Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
  with Vidalia, and otherwise continues to get us closer to a release
  candidate.

  o Major features:
    - Enable gcc and ld hardening by default. Resolves ticket 5210.
    - Update TLS cipher list to match Firefox 8 and later. Resolves
      ticket 4744.
    - Implement the client side of proposal 198: remove support for
      clients falsely claiming to support standard ciphersuites that
      they can actually provide. As of modern OpenSSL versions, it's not
      necessary to fake any standard ciphersuite, and doing so prevents
      us from using better ciphersuites in the future, since servers
      can't know whether an advertised ciphersuite is really supported or
      not. Some hosts -- notably, ones with very old versions of OpenSSL
      or where OpenSSL has been built with ECC disabled -- will stand
      out because of this change; TBB users should not be affected.

  o Major bugfixes:
    - Change the default value for DynamicDHGroups (introduced in
      0.2.3.9-alpha) to 0. This feature can make Tor relays less
      identifiable by their use of the mod_ssl DH group, but at
      the cost of some usability (#4721) and bridge tracing (#6087)
      regressions. Resolves ticket 5598.
    - Send a CRLF at the end of each STATUS_* control protocol event. This
      bug tickled a bug in Vidalia which would make it freeze. Fixes
      bug 6094; bugfix on 0.2.3.16-alpha.

  o Minor bugfixes:
    - Disable writing on marked-for-close connections when they are
      blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
      bug 5263; bugfix on 0.0.2pre13, where we first added a special
      case for flushing marked connections.
    - Detect SSL handshake even when the initial attempt to write the
      server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
    - Change the AllowDotExit rules so they should actually work.
      We now enforce AllowDotExit only immediately after receiving an
      address via SOCKS or DNSPort: other sources are free to provide
      .exit addresses after the resolution occurs. Fixes bug 3940;
      bugfix on 0.2.2.1-alpha.
    - Fix a (harmless) integer overflow in cell statistics reported by
      some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
    - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
      right places and never depends on the consensus parameters or
      computes adaptive timeouts when it is disabled. Fixes bug 5049;
      bugfix on 0.2.2.14-alpha.
    - When building Tor on Windows with -DUNICODE (not default), ensure
      that error messages, filenames, and DNS server names are always
      NUL-terminated when we convert them to a single-byte encoding.
      Fixes bug 5909; bugfix on 0.2.2.16-alpha.
    - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
      Fixes bug 6097; bugfix on 0.2.2.16-alpha.
    - Fix an edge case where TestingTorNetwork is set but the authorities
      and relays all have an uptime of zero, where the private Tor network
      could briefly lack support for hidden services. Fixes bug 3886;
      bugfix on 0.2.2.18-alpha.
    - Correct the manpage's descriptions for the default values of
      DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
      on 0.2.3.1-alpha.
    - Fix the documentation for the --hush and --quiet command line
      options, which changed their behavior back in 0.2.3.3-alpha.
    - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
      0.2.3.11-alpha.

  o Minor features:
    - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
      more information to it, so that we can track it down in case it
      returns again. Mitigates bug 5235.
    - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
      options_validate(); warn if LearnCircuitBuildTimeout is disabled and
      CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
    - Warn the user when HTTPProxy, but no other proxy type, is
      configured. This can cause surprising behavior: it doesn't send
      all of Tor's traffic over the HTTPProxy -- it sends unencrypted
      directory traffic only. Resolves ticket 4663.
    - Issue a notice if a guard completes less than 40% of your circuits.
      Threshold is configurable by torrc option PathBiasNoticeRate and
      consensus parameter pb_noticepct. There is additional, off-by-
      default code to disable guards which fail too many circuits.
      Addresses ticket 5458.
    - Update to the June 6 2012 Maxmind GeoLite Country database.

  o Code simplifications and refactoring:
    - Remove validate_pluggable_transports_config(): its warning
      message is now handled by connection_or_connect().


Changes in version 0.2.2.37 - 2012-06-06
  Tor 0.2.2.37 introduces a workaround for a critical renegotiation
  bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
  currently).

  o Major bugfixes:
    - Work around a bug in OpenSSL that broke renegotiation with TLS
      1.1 and TLS 1.2. Without this workaround, all attempts to speak
      the v2 Tor connection protocol when both sides were using OpenSSL
      1.0.1 would fail. Resolves ticket 6033.
    - When waiting for a client to renegotiate, don't allow it to add
      any bytes to the input buffer. This fixes a potential DoS issue.
      Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
    - Fix an edge case where if we fetch or publish a hidden service
      descriptor, we might build a 4-hop circuit and then use that circuit
      for exiting afterwards -- even if the new last hop doesn't obey our
      ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.

  o Minor bugfixes:
    - Fix a build warning with Clang 3.1 related to our use of vasprintf.
      Fixes bug 5969. Bugfix on 0.2.2.11-alpha.

  o Minor features:
    - Tell GCC and Clang to check for any errors in format strings passed
      to the tor_v*(print|scan)f functions.


Changes in version 0.2.3.16-alpha - 2012-06-05
  Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
  bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
  currently). It also fixes a variety of smaller bugs and other cleanups
  that get us closer to a release candidate.

  o Major bugfixes (general):
    - Work around a bug in OpenSSL that broke renegotiation with TLS
      1.1 and TLS 1.2. Without this workaround, all attempts to speak
      the v2 Tor connection protocol when both sides were using OpenSSL
      1.0.1 would fail. Resolves ticket 6033.
    - When waiting for a client to renegotiate, don't allow it to add
      any bytes to the input buffer. This fixes a potential DoS issue.
      Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
    - Pass correct OR address to managed proxies (like obfsproxy),
      even when ORListenAddress is used. Fixes bug 4865; bugfix on
      0.2.3.9-alpha.
    - The advertised platform of a router now includes only its operating
      system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
      service pack level (for Windows) or its CPU architecture (for Unix).
      We also no longer include the "git-XYZ" tag in the version. Resolves
      part of bug 2988.

  o Major bugfixes (clients):
    - If we are unable to find any exit that supports our predicted ports,
      stop calling them predicted, so that we don't loop and build
      hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
      which introduced predicted ports.
    - Fix an edge case where if we fetch or publish a hidden service
      descriptor, we might build a 4-hop circuit and then use that circuit
      for exiting afterwards -- even if the new last hop doesn't obey our
      ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
    - Check at each new consensus whether our entry guards were picked
      long enough ago that we should rotate them. Previously, we only
      did this check at startup, which could lead to us holding a guard
      indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
    - When fetching a bridge descriptor from a bridge authority,
      always do so anonymously, whether we have been able to open
      circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
      This behavior makes it *safer* to use UpdateBridgesFromAuthority,
      but we'll need to wait for bug 6010 before it's actually usable.

  o Major bugfixes (directory authorities):
    - When computing weight parameters, behave more robustly in the
      presence of a bad bwweightscale value. Previously, the authorities
      would crash if they agreed on a sufficiently broken weight_scale
      value: now, they use a reasonable default and carry on. Partial
      fix for 5786; bugfix on 0.2.2.17-alpha.
    - Check more thoroughly to prevent a rogue authority from
      double-voting on any consensus directory parameter. Previously,
      authorities would crash in this case if the total number of
      votes for any parameter exceeded the number of active voters,
      but would let it pass otherwise. Partial fix for bug 5786; bugfix
      on 0.2.2.2-alpha.

  o Minor features:
    - Rate-limit log messages when asked to connect anonymously to
      a private address. When these hit, they tended to hit fast and
      often. Also, don't bother trying to connect to addresses that we
      are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
      reply makes us think we have been lied to, even when the address the
      client tried to connect to was "localhost." Resolves ticket 2822.
    - Allow packagers to insert an extra string in server descriptor
      platform lines by setting the preprocessor variable TOR_BUILD_TAG.
      Resolves the rest of ticket 2988.
    - Raise the threshold of server descriptors needed (75%) and exit
      server descriptors needed (50%) before we will declare ourselves
      bootstrapped. This will make clients start building circuits a
      little later, but makes the initially constructed circuits less
      skewed and less in conflict with further directory fetches. Fixes
      ticket 3196.
    - Close any connection that sends unrecognized junk before the
      handshake. Solves an issue noted in bug 4369.
    - Improve log messages about managed transports. Resolves ticket 5070.
    - Tag a bridge's descriptor as "never to be sent unencrypted".
      This shouldn't matter, since bridges don't open non-anonymous
      connections to the bridge authority and don't allow unencrypted
      directory connections from clients, but we might as well make
      sure. Closes bug 5139.
    - Expose our view of whether we have gone dormant to the controller,
      via a new "GETINFO dormant" value. Torbutton and other controllers
      can use this to avoid doing periodic requests through Tor while
      it's dormant (bug 4718). Fixes bug 5954.
    - Tell GCC and Clang to check for any errors in format strings passed
      to the tor_v*(print|scan)f functions.
    - Update to the May 1 2012 Maxmind GeoLite Country database.

  o Minor bugfixes (already included in 0.2.2.36):
    - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
      Fixes bug 5346; bugfix on 0.0.8pre3.
    - Correct parsing of certain date types in parse_http_time().
      Without this patch, If-Modified-Since would behave
      incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
      Esteban Manchado Velázques.
    - Make our number-parsing functions always treat too-large values
      as an error, even when those values exceed the width of the
      underlying type. Previously, if the caller provided these
      functions with minima or maxima set to the extreme values of the
      underlying integer type, these functions would return those
      values on overflow rather than treating overflow as an error.
      Fixes part of bug 5786; bugfix on 0.0.9.
    - If we hit the error case where routerlist_insert() replaces an
      existing (old) server descriptor, make sure to remove that
      server descriptor from the old_routers list. Fix related to bug
      1776. Bugfix on 0.2.2.18-alpha.
    - Clarify the behavior of MaxCircuitDirtiness with hidden service
      circuits. Fixes issue 5259.

  o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
    - Prevent a null-pointer dereference when receiving a data cell
      for a nonexistent stream when the circuit in question has an
      empty deliver window. We don't believe this is triggerable,
      since we don't currently allow deliver windows to become empty,
      but the logic is tricky enough that it's better to make the code
      robust. Fixes bug 5541; bugfix on 0.0.2pre14.
    - Fix a memory leak when trying to launch a DNS request when the
      network is disabled or the nameservers are unconfigurable. Fixes
      bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
      nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
    - Don't hold a Windows file handle open for every file mapping;
      the file mapping handle is sufficient. Fixes bug 5951; bugfix on
      0.1.2.1-alpha.
    - Avoid O(n^2) performance characteristics when parsing a large
      extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
    - Format more doubles with %f, not %lf. Patch from grarpamp to make
      Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
      Tor 0.2.0.8-alpha.
    - Make our replacement implementation of strtok_r() compatible with
      the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
      bugfix on 0.2.2.1-alpha.
    - Fix a NULL-pointer dereference on a badly formed
      SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
      bugfix on 0.2.2.9-alpha.
    - Fix a build warning with Clang 3.1 related to our use of vasprintf.
      Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
    - Defensively refactor rend_mid_rendezvous() so that protocol
      violations and length checks happen in the beginning. Fixes
      bug 5645.
    - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
      that IPv6 stuff will compile on MSVC, and compilation issues
      will be easier to track down. Fixes bug 5861.

  o Minor bugfixes (correctness, on 0.2.2.x and earlier):
    - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
      resource exhaustion, so that clients can adjust their load to
      try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
      started using END_STREAM_REASON_RESOURCELIMIT.
    - Don't check for whether the address we're using for outbound
      connections has changed until after the outbound connection has
      completed. On Windows, getsockname() doesn't succeed until the
      connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
    - If the configuration tries to set MyFamily on a bridge, refuse to
      do so, and warn about the security implications. Fixes bug 4657;
      bugfix on 0.2.0.3-alpha.
    - If the client fails to set a reasonable set of ciphersuites
      during its v2 handshake renegotiation, allow the renegotiation to
      continue nevertheless (i.e. send all the required certificates).
      Fixes bug 4591; bugfix on 0.2.0.20-rc.
    - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
      option is set to 0 (which Vidalia version 0.2.16 now does when
      a SAVECONF attempt fails), perform other actions that SIGHUP
      usually causes (like reopening the logs). Fixes bug 5095; bugfix
      on 0.2.1.9-alpha.
    - If we fail to write a microdescriptor to the disk cache, do not
      continue replacing the old microdescriptor file. Fixes bug 2954;
      bugfix on 0.2.2.6-alpha.
    - Exit nodes don't need to fetch certificates for authorities that
      they don't recognize; only directory authorities, bridges,
      and caches need to do that. Fixes part of bug 2297; bugfix on
      0.2.2.11-alpha.
    - Correctly handle checking the permissions on the parent
      directory of a control socket in the root directory. Bug found
      by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
      0.2.2.26-beta.
    - When told to add a bridge with the same digest as a preexisting
      bridge but a different addr:port, change the addr:port as
      requested. Previously we would not notice the change. Fixes half
      of bug 5603; fix on 0.2.2.26-beta.
    - End AUTHCHALLENGE error messages (in the control protocol) with
      a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.

  o Minor bugfixes (on 0.2.3.x):
    - Turn an assertion (that the number of handshakes received as a
      server is not < 1) into a warning. Fixes bug 4873; bugfix on
      0.2.3.1-alpha.
    - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
      we had reversed them when the answer was cached.) Fixes bug
      5723; bugfix on 0.2.3.1-alpha.
    - Work correctly on Linux systems with accept4 support advertised in
      their headers, but without accept4 support in the kernel. Fix
      by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
    - When told to add a bridge with the same addr:port as a preexisting
      bridge but a different transport, change the transport as
      requested. Previously we would not notice the change. Fixes half
      of bug 5603; fix on 0.2.3.2-alpha.
    - Avoid a "double-reply" warning when replying to a SOCKS request
      with a parse error. Patch from Fabian Keil. Fixes bug 4108;
      bugfix on 0.2.3.4-alpha.
    - Fix a bug where a bridge authority crashes if it has seen no
      directory requests when it's time to write statistics to disk.
      Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
      a better way.
    - Don't try to open non-control listeners when DisableNetwork is set.
      Previously, we'd open all listeners, then immediately close them.
      Fixes bug 5604; bugfix on 0.2.3.9-alpha.
    - Don't abort the managed proxy protocol if the managed proxy
      sends us an unrecognized line; ignore it instead. Fixes bug
      5910; bugfix on 0.2.3.9-alpha.
    - Fix a compile warning in crypto.c when compiling with clang 3.1.
      Fixes bug 5969, bugfix on 0.2.3.9-alpha.
    - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
      Fixes bug 5355; bugfix on 0.2.3.11-alpha.
    - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
      unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
    - Resolve numerous small warnings and build issues with MSVC. Resolves
      bug 5859.

  o Documentation fixes:
    - Improve the manual's documentation for the NT Service command-line
      options. Addresses ticket 3964.
    - Clarify SessionGroup documentation slightly; resolves ticket 5437.
    - Document the changes to the ORPort and DirPort options, and the
      fact that {OR/Dir}ListenAddress is now unnecessary (and
      therefore deprecated). Resolves ticket 5597.

  o Removed files:
    - Remove the torrc.bridge file: we don't use it for anything, and
      it had become badly desynchronized from torrc.sample. Resolves
      bug 5622.


Changes in version 0.2.2.36 - 2012-05-24
  Tor 0.2.2.36 updates the addresses for two of the eight directory
  authorities, fixes some potential anonymity and security issues,
  and fixes several crash bugs.

  Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
  known flaws, and nobody should be using them. You should upgrade. If
  you're using a Linux or BSD and its packages are obsolete, stop using
  those packages and upgrade anyway.

  o Directory authority changes:
    - Change IP address for maatuska (v3 directory authority).
    - Change IP address for ides (v3 directory authority), and rename
      it to turtles.

  o Security fixes:
    - When building or running with any version of OpenSSL earlier
      than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
      versions have a bug (CVE-2011-4576) in which their block cipher
      padding includes uninitialized data, potentially leaking sensitive
      information to any peer with whom they make a SSLv3 connection. Tor
      does not use SSL v3 by default, but a hostile client or server
      could force an SSLv3 connection in order to gain information that
      they shouldn't have been able to get. The best solution here is to
      upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
      or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
      to make sure that the bug can't happen.
    - Never use a bridge or a controller-supplied node as an exit, even
      if its exit policy allows it. Found by wanoskarnet. Fixes bug
      5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
      and 0.2.0.3-alpha (for bridge-purpose descriptors).
    - Only build circuits if we have a sufficient threshold of the total
      descriptors that are marked in the consensus with the "Exit"
      flag. This mitigates an attack proposed by wanoskarnet, in which
      all of a client's bridges collude to restrict the exit nodes that
      the client knows about. Fixes bug 5343.
    - Provide controllers with a safer way to implement the cookie
      authentication mechanism. With the old method, if another locally
      running program could convince a controller that it was the Tor
      process, then that program could trick the controller into telling
      it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
      authentication method uses a challenge-response approach to prevent
      this attack. Fixes bug 5185; implements proposal 193.

  o Major bugfixes:
    - Avoid logging uninitialized data when unable to decode a hidden
      service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
    - Avoid a client-side assertion failure when receiving an INTRODUCE2
      cell on a general purpose circuit. Fixes bug 5644; bugfix on
      0.2.1.6-alpha.
    - Fix builds when the path to sed, openssl, or sha1sum contains
      spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
      on 0.2.2.1-alpha.
    - Correct our replacements for the timeradd() and timersub() functions
      on platforms that lack them (for example, Windows). The timersub()
      function is used when expiring circuits, while timeradd() is
      currently unused. Bug report and patch by Vektor. Fixes bug 4778;
      bugfix on 0.2.2.24-alpha.
    - Fix the SOCKET_OK test that we use to tell when socket
      creation fails so that it works on Win64. Fixes part of bug 4533;
      bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.

  o Minor bugfixes:
    - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
      Fixes bug 5346; bugfix on 0.0.8pre3.
    - Make our number-parsing functions always treat too-large values
      as an error, even when those values exceed the width of the
      underlying type. Previously, if the caller provided these
      functions with minima or maxima set to the extreme values of the
      underlying integer type, these functions would return those
      values on overflow rather than treating overflow as an error.
      Fixes part of bug 5786; bugfix on 0.0.9.
    - Older Linux kernels erroneously respond to strange nmap behavior
      by having accept() return successfully with a zero-length
      socket. When this happens, just close the connection. Previously,
      we would try harder to learn the remote address: but there was
      no such remote address to learn, and our method for trying to
      learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
      on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
    - Correct parsing of certain date types in parse_http_time().
      Without this patch, If-Modified-Since would behave
      incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
      Esteban Manchado Velázques.
    - Change the BridgePassword feature (part of the "bridge community"
      design, which is not yet implemented) to use a time-independent
      comparison. The old behavior might have allowed an adversary
      to use timing to guess the BridgePassword value. Fixes bug 5543;
      bugfix on 0.2.0.14-alpha.
    - Detect and reject certain misformed escape sequences in
      configuration values. Previously, these values would cause us
      to crash if received in a torrc file or over an authenticated
      control port. Bug found by Esteban Manchado Velázquez, and
      independently by Robert Connolly from Matta Consulting who further
      noted that it allows a post-authentication heap overflow. Patch
      by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
      bugfix on 0.2.0.16-alpha.
    - Fix a compile warning when using the --enable-openbsd-malloc
      configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
    - During configure, detect when we're building with clang version
      3.0 or lower and disable the -Wnormalized=id and -Woverride-init
      CFLAGS. clang doesn't support them yet.
    - When sending an HTTP/1.1 proxy request, include a Host header.
      Fixes bug 5593; bugfix on 0.2.2.1-alpha.
    - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
      command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
    - If we hit the error case where routerlist_insert() replaces an
      existing (old) server descriptor, make sure to remove that
      server descriptor from the old_routers list. Fix related to bug
      1776. Bugfix on 0.2.2.18-alpha.

  o Minor bugfixes (documentation and log messages):
    - Fix a typo in a log message in rend_service_rendezvous_has_opened().
      Fixes bug 4856; bugfix on Tor 0.0.6.
    - Update "ClientOnly" man page entry to explain that there isn't
      really any point to messing with it. Resolves ticket 5005.
    - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
      directory authority option (introduced in Tor 0.2.2.34).
    - Downgrade the "We're missing a certificate" message from notice
      to info: people kept mistaking it for a real problem, whereas it
      is seldom the problem even when we are failing to bootstrap. Fixes
      bug 5067; bugfix on 0.2.0.10-alpha.
    - Correctly spell "connect" in a log message on failure to create a
      controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
    - Clarify the behavior of MaxCircuitDirtiness with hidden service
      circuits. Fixes issue 5259.

  o Minor features:
    - Directory authorities now reject versions of Tor older than
      0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
      inclusive. These versions accounted for only a small fraction of
      the Tor network, and have numerous known security issues. Resolves
      issue 4788.
    - Update to the May 1 2012 Maxmind GeoLite Country database.

  - Feature removal:
    - When sending or relaying a RELAY_EARLY cell, we used to convert
      it to a RELAY cell if the connection was using the v1 link
      protocol. This was a workaround for older versions of Tor, which
      didn't handle RELAY_EARLY cells properly. Now that all supported
      versions can handle RELAY_EARLY cells, and now that we're enforcing
      the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
      remove this workaround. Addresses bug 4786.


Changes in version 0.2.3.15-alpha - 2012-04-30
  Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
  the development branch build on Windows again.

  o Minor bugfixes (on 0.2.2.x and earlier):
    - Make sure that there are no unhandled pending TLS errors before
      reading from a TLS stream. We had checks in 0.1.0.3-rc, but
      lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
      Bugfix on 0.1.0.5-rc; fixes bug 4528.
    - Fix an assert that directory authorities could trigger on sighup
      during some configuration state transitions. We now don't treat
      it as a fatal error when the new descriptor we just generated in
      init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
    - After we pick a directory mirror, we would refuse to use it if
      it's in our ExcludeExitNodes list, resulting in mysterious failures
      to bootstrap for people who just wanted to avoid exiting from
      certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
    - When building with --enable-static-tor on OpenBSD, do not
      erroneously attempt to link -lrt. Fixes bug 5103.

  o Minor bugfixes (on 0.2.3.x):
    - When Tor is built with kernel headers from a recent (last few
      years) Linux kernel, do not fail to run on older (pre-2.6.28
      Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
    - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
      and 0.2.3.12-alpha.
    - Fix compilation with miniupnpc version 1.6; patch from
      Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
    - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
      on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
    - Fix compilation on platforms without unistd.h, or where environ
      is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.

  o Minor features:
    - Directory authorities are now a little more lenient at accepting
      older router descriptors, or newer router descriptors that don't
      make big changes. This should help ameliorate past and future
      issues where routers think they have uploaded valid descriptors,
      but the authorities don't think so. Fix for ticket 2479.
    - Make the code that clients use to detect an address change be
      IPv6-aware, so that it won't fill clients' logs with error
      messages when trying to get the IPv4 address of an IPv6
      connection. Implements ticket 5537.

  o Removed features:
    - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
      authorities needed to use it for a while to keep the network working
      as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
      that was six months ago. As of now, it should no longer be needed
      or used.


Changes in version 0.2.3.14-alpha - 2012-04-23
  Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
  candidate. It also dramatically speeds up AES: fast relays should
  consider switching to the newer OpenSSL library.

  o Directory authority changes:
    - Change IP address for ides (v3 directory authority), and rename
      it to turtles.

  o Major bugfixes:
    - Avoid logging uninitialized data when unable to decode a hidden
      service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
    - Avoid a client-side assertion failure when receiving an INTRODUCE2
      cell on a general purpose circuit. Fixes bug 5644; bugfix on
      0.2.1.6-alpha.
    - If authorities are unable to get a v2 consensus document from other
      directory authorities, they no longer fall back to fetching
      them from regular directory caches. Fixes bug 5635; bugfix on
      0.2.2.26-beta, where routers stopped downloading v2 consensus
      documents entirely.
    - When we start a Tor client with a normal consensus already cached,
      be willing to download a microdescriptor consensus. Fixes bug 4011;
      fix on 0.2.3.1-alpha.

  o Major features (performance):
    - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
      instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
      vectorized AES implementations as appropriate. These can be much,
      much faster than other AES implementations.

  o Minor bugfixes (0.2.2.x and earlier):
    - Don't launch more than 10 service-side introduction-point circuits
      for a hidden service in five minutes. Previously, we would consider
      launching more introduction-point circuits if at least one second
      had passed without any introduction-point circuits failing. Fixes
      bug 4607; bugfix on 0.0.7pre1.
    - Change the BridgePassword feature (part of the "bridge community"
      design, which is not yet implemented) to use a time-independent
      comparison. The old behavior might have allowed an adversary
      to use timing to guess the BridgePassword value. Fixes bug 5543;
      bugfix on 0.2.0.14-alpha.
    - Enforce correct return behavior of tor_vsscanf() when the '%%'
      pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
    - When sending an HTTP/1.1 proxy request, include a Host header.
      Fixes bug 5593; bugfix on 0.2.2.1-alpha.
    - Don't log that we have "decided to publish new relay descriptor"
      unless we are actually publishing a descriptor. Fixes bug 3942;
      bugfix on 0.2.2.28-beta.

  o Minor bugfixes (0.2.3.x):
    - Fix a bug where a bridge authority crashes (on a failed assert)
      if it has seen no directory requests when it's time to write
      statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
    - Fix bug stomping on ORPort option NoListen and ignoring option
      NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
    - In the testsuite, provide a large enough buffer in the tor_sscanf
      unit test. Otherwise we'd overrun that buffer and crash during
      the unit tests. Found by weasel. Fixes bug 5449; bugfix on
      0.2.3.12-alpha.
    - Make sure we create the keys directory if it doesn't exist and we're
      about to store the dynamic Diffie-Hellman parameters. Fixes bug
      5572; bugfix on 0.2.3.13-alpha.
    - Fix a small memory leak when trying to decode incorrect base16
      authenticator during SAFECOOKIE authentication. Found by
      Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.

  o Minor features:
    - Add more information to a log statement that might help track down
      bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
      non-IP address" messages (or any Bug messages, for that matter!),
      please let us know about it.
    - Relays now understand an IPv6 address when they get one from a
      directory server. Resolves ticket 4875.
    - Resolve IPv6 addresses in bridge and entry statistics to country
      code "??" which means we at least count them. Resolves ticket 5053;
      improves on 0.2.3.9-alpha.
    - Update to the April 3 2012 Maxmind GeoLite Country database.
    - Begin a doc/state-contents.txt file to explain the contents of
      the Tor state file. Fixes bug 2987.

  o Default torrc changes:
    - Stop listing "socksport 9050" in torrc.sample. We open a socks
      port on 9050 by default anyway, so this should not change anything
      in practice.
    - Stop mentioning the deprecated *ListenAddress options in
      torrc.sample. Fixes bug 5438.
    - Document unit of bandwidth related options in sample torrc.
      Fixes bug 5621.

  o Removed features:
    - The "torify" script no longer supports the "tsocks" socksifier
      tool, since tsocks doesn't support DNS and UDP right for Tor.
      Everyone should be using torsocks instead. Fixes bugs 3530 and
      5180. Based on a patch by "ugh".

  o Code refactoring:
    - Change the symmetric cipher interface so that creating and
      initializing a stream cipher are no longer separate functions.
    - Remove all internal support for unpadded RSA. We never used it, and
      it would be a bad idea to start.


Changes in version 0.2.3.13-alpha - 2012-03-26
  Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
  in managed pluggable transports, as well as providing other cleanups
  that get us closer to a release candidate.

  o Directory authority changes:
    - Change IP address for maatuska (v3 directory authority).

  o Security fixes:
    - Provide controllers with a safer way to implement the cookie
      authentication mechanism. With the old method, if another locally
      running program could convince a controller that it was the Tor
      process, then that program could trick the controller into telling
      it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
      authentication method uses a challenge-response approach to prevent
      this attack. Fixes bug 5185, implements proposal 193.
    - Never use a bridge or a controller-supplied node as an exit, even
      if its exit policy allows it. Found by wanoskarnet. Fixes bug
      5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
      and 0.2.0.3-alpha (for bridge-purpose descriptors).
    - Only build circuits if we have a sufficient threshold of the total
      descriptors that are marked in the consensus with the "Exit"
      flag. This mitigates an attack proposed by wanoskarnet, in which
      all of a client's bridges collude to restrict the exit nodes that
      the client knows about. Fixes bug 5343.

  o Major bugfixes (on Tor 0.2.3.x):
    - Avoid an assert when managed proxies like obfsproxy are configured,
      and we receive HUP signals or setconf attempts too rapidly. This
      situation happens most commonly when Vidalia tries to attach to
      Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
      bugfix on 0.2.3.6-alpha.
    - Fix a relay-side pluggable transports bug where managed proxies were
      unreachable from the Internet, because Tor asked them to bind on
      localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
    - Stop discarding command-line arguments when TestingTorNetwork
      is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
      0.2.3.9-alpha, where task 4552 added support for two layers of
      torrc files.
    - Resume allowing the unit tests to run in gdb. This was accidentally
      made impossible when the DisableDebuggerAttachment option was
      introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
    - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
      0.2.3.11-alpha. Reported by Anthony G. Basile.

  o Minor bugfixes (on 0.2.2.x and earlier):
    - Ensure we don't cannibalize circuits that are longer than three hops
      already, so we don't end up making circuits with 5 or more
      hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
      0.1.0.1-rc which introduced cannibalization.
    - Detect and reject certain misformed escape sequences in
      configuration values. Previously, these values would cause us
      to crash if received in a torrc file or over an authenticated
      control port. Bug found by Esteban Manchado Velázquez, and
      independently by Robert Connolly from Matta Consulting who further
      noted that it allows a post-authentication heap overflow. Patch
      by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
      bugfix on 0.2.0.16-alpha.
    - Fix a compile warning when using the --enable-openbsd-malloc
      configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
    - Directory caches no longer refuse to clean out descriptors because
      of missing v2 networkstatus documents, unless they're configured
      to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
      0.2.2.26-beta. Patch by Daniel Bryg.
    - Update to the latest version of the tinytest unit testing framework.
      This includes a couple of bugfixes that can be relevant for
      running forked unit tests on Windows, and removes all reserved
      identifiers.

  o Minor bugfixes (on 0.2.3.x):
    - On a failed pipe() call, don't leak file descriptors. Fixes bug
      4296; bugfix on 0.2.3.1-alpha.
    - Spec conformance: on a v3 handshake, do not send a NETINFO cell
      until after we have received a CERTS cell. Fixes bug 4361; bugfix
      on 0.2.3.6-alpha. Patch by "frosty".
    - When binding to an IPv6 address, set the IPV6_V6ONLY socket
      option, so that the IP stack doesn't decide to use it for IPv4
      too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
    - Ensure that variables set in Tor's environment cannot override
      environment variables that Tor passes to a managed
      pluggable-transport proxy. Previously, Tor would pass every
      variable in its environment to managed proxies along with the new
      ones, in such a way that on many operating systems, the inherited
      environment variables would override those which Tor tried to
      explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
      bugfix on 0.2.3.9-alpha for Windows.

  o Minor features:
    - A wide variety of new unit tests by Esteban Manchado Velázquez.
    - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
    - Update to the March 6 2012 Maxmind GeoLite Country database.


Changes in version 0.2.3.12-alpha - 2012-02-13
  Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
  to use bridges that run Tor 0.2.2.x, and resolves several big bugs
  when Tor is configured to use a pluggable transport like obfsproxy.

  o Major bugfixes:
    - Fix builds when the path to sed, openssl, or sha1sum contains
      spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
      on 0.2.2.1-alpha.
    - Set the SO_REUSEADDR socket option before we call bind() on outgoing
      connections. This change should allow busy exit relays to stop
      running out of available sockets as quickly. Fixes bug 4950;
      bugfix on 0.2.2.26-beta.
    - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
      would ask the bridge for microdescriptors, which are only supported
      in 0.2.3.x, and then fail to bootstrap when it didn't get the
      answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
    - Properly set up obfsproxy's environment when in managed mode. The
      Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
      and when you run your Tor as a daemon, there's no HOME. Fixes bugs
      5076 and 5082; bugfix on 0.2.3.6-alpha.

  o Minor features:
    - Use the dead_strip option when building Tor on OS X. This reduces
      binary size by almost 19% when linking openssl and libevent
      statically, which we do for Tor Browser Bundle.
    - Fix broken URLs in the sample torrc file, and tell readers about
      the OutboundBindAddress, ExitPolicyRejectPrivate, and
      PublishServerDescriptor options. Addresses bug 4652.
    - Update to the February 7 2012 Maxmind GeoLite Country database.

  o Minor bugfixes:
    - Downgrade the "We're missing a certificate" message from notice
      to info: people kept mistaking it for a real problem, whereas it
      is seldom the problem even when we are failing to bootstrap. Fixes
      bug 5067; bugfix on 0.2.0.10-alpha.
    - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
      managed pluggable transport server proxy's environment.
      Previously, we would put it there, even though Tor doesn't
      implement an 'extended server port' yet, and even though Tor
      almost certainly isn't listening at that address. For now, we set
      it to an empty string to avoid crashing older obfsproxies. Bugfix
      on 0.2.3.6-alpha.
    - Log the heartbeat message every HeartbeatPeriod seconds, not every
      HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
      0.2.3.1-alpha. Bug reported by Scott Bennett.
    - Calculate absolute paths correctly on Windows. Fixes bug 4973;
      bugfix on 0.2.3.11-alpha.
    - Update "ClientOnly" man page entry to explain that there isn't
      really any point to messing with it. Resolves ticket 5005.
    - Use the correct CVE number for CVE-2011-4576 in our comments and
      log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
      0.2.3.11-alpha.

  o Code simplifications and refactoring:
    - Use the _WIN32 macro throughout our code to detect Windows.
      (Previously we had used the obsolete 'WIN32' and the idiosyncratic
      'MS_WINDOWS'.)


Changes in version 0.2.3.11-alpha - 2012-01-22
  Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
  the last step of the plan to limit maximum circuit length, includes
  a wide variety of hidden service performance and correctness fixes,
  works around an OpenSSL security flaw if your distro is too stubborn
  to upgrade, and fixes a bunch of smaller issues.

  o Major features:
    - Now that Tor 0.2.0.x is completely deprecated, enable the final
      part of "Proposal 110: Avoiding infinite length circuits" by
      refusing all circuit-extend requests that do not use a relay_early
      cell. This change helps Tor resist a class of denial-of-service
      attacks by limiting the maximum circuit length.
    - Adjust the number of introduction points that a hidden service
      will try to maintain based on how long its introduction points
      remain in use and how many introductions they handle. Fixes
      part of bug 3825.
    - Try to use system facilities for enumerating local interface
      addresses, before falling back to our old approach (which was
      binding a UDP socket, and calling getsockname() on it). That
      approach was scaring OS X users whose draconian firewall
      software warned about binding to UDP sockets, regardless of
      whether packets were sent. Now we try to use getifaddrs(),
      SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
      system supports. Resolves ticket 1827.

  o Major security workaround:
    - When building or running with any version of OpenSSL earlier
      than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
      versions have a bug (CVE-2011-4576) in which their block cipher
      padding includes uninitialized data, potentially leaking sensitive
      information to any peer with whom they make a SSLv3 connection. Tor
      does not use SSL v3 by default, but a hostile client or server
      could force an SSLv3 connection in order to gain information that
      they shouldn't have been able to get. The best solution here is to
      upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
      or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
      to make sure that the bug can't happen.

  o Major bugfixes:
    - Fix the SOCKET_OK test that we use to tell when socket
      creation fails so that it works on Win64. Fixes part of bug 4533;
      bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
    - Correct our replacements for the timeradd() and timersub() functions
      on platforms that lack them (for example, Windows). The timersub()
      function is used when expiring circuits, while timeradd() is
      currently unused. Bug report and patch by Vektor. Fixes bug 4778;
      bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
    - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
      that was fixed in OpenSSL 1.0.0a. We test for the counter mode
      bug at runtime, not compile time, because some distributions hack
      their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
      on 0.2.3.9-alpha. Found by Pascal.

  o Minor features (controller):
    - Use absolute path names when reporting the torrc filename in the
      control protocol, so a controller can more easily find the torrc
      file. Resolves bug 1101.
    - Extend the control protocol to report flags that control a circuit's
      path selection in CIRC events and in replies to 'GETINFO
      circuit-status'. Implements part of ticket 2411.
    - Extend the control protocol to report the hidden service address
      and current state of a hidden-service-related circuit in CIRC
      events and in replies to 'GETINFO circuit-status'. Implements part
      of ticket 2411.
    - When reporting the path to the cookie file to the controller,
      give an absolute path. Resolves ticket 4881.
    - Allow controllers to request an event notification whenever a
      circuit is cannibalized or its purpose is changed. Implements
      part of ticket 3457.
    - Include the creation time of a circuit in CIRC and CIRC2
      control-port events and the list produced by the 'GETINFO
      circuit-status' control-port command.

  o Minor features (directory authorities):
    - Directory authorities now reject versions of Tor older than
      0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
      inclusive. These versions accounted for only a small fraction of
      the Tor network, and have numerous known security issues. Resolves
      issue 4788.
    - Authority operators can now vote for all relays in a given
      set of countries to be BadDir/BadExit/Invalid/Rejected.
    - Provide two consensus parameters (FastFlagMinThreshold and
      FastFlagMaxThreshold) to control the range of allowable bandwidths
      for the Fast directory flag. These allow authorities to run
      experiments on appropriate requirements for being a "Fast" node.
      The AuthDirFastGuarantee config value still applies. Implements
      ticket 3946.
    - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
      directory authority option (introduced in Tor 0.2.2.34).

  o Minor features (other):
    - Don't disable the DirPort when we cannot exceed our AccountingMax
      limit during this interval because the effective bandwidthrate is
      low enough. This is useful in a situation where AccountMax is only
      used as an additional safeguard or to provide statistics.
    - Prepend an informative header to generated dynamic_dh_params files.
    - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
      EntryNodes will have no effect. Resolves issue 2571.
    - Log more useful messages when we fail to disable debugger
      attachment.
    - Log which authority we're missing votes from when we go to fetch
      them from the other auths.
    - Log (at debug level) whenever a circuit's purpose is changed.
    - Add missing documentation for the MaxClientCircuitsPending,
      UseMicrodescriptors, UserspaceIOCPBuffers, and
      _UseFilteringSSLBufferevents options, all introduced during
      the 0.2.3.x series.
    - Update to the January 3 2012 Maxmind GeoLite Country database.

  o Minor bugfixes (hidden services):
    - Don't close hidden service client circuits which have almost
      finished connecting to their destination when they reach
      the normal circuit-build timeout. Previously, we would close
      introduction circuits which are waiting for an acknowledgement
      from the introduction point, and rendezvous circuits which have
      been specified in an INTRODUCE1 cell sent to a hidden service,
      after the normal CBT. Now, we mark them as 'timed out', and launch
      another rendezvous attempt in parallel. This behavior change can
      be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
      option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
    - Don't close hidden-service-side rendezvous circuits when they
      reach the normal circuit-build timeout. This behaviour change can
      be disabled using the new
      CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
      remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
    - Make sure we never mark the wrong rendezvous circuit as having
      had its introduction cell acknowleged by the introduction-point
      relay. Previously, when we received an INTRODUCE_ACK cell on a
      client-side hidden-service introduction circuit, we might have
      marked a rendezvous circuit other than the one we specified in
      the INTRODUCE1 cell as INTRO_ACKED, which would have produced
      a warning message and interfered with the hidden service
      connection-establishment process. Fixes bug 4759; bugfix on
      0.2.3.3-alpha, when we added the stream-isolation feature which
      might cause Tor to open multiple rendezvous circuits for the same
      hidden service.
    - Don't trigger an assertion failure when we mark a new client-side
      hidden-service introduction circuit for close during the process
      of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
      by murb.

  o Minor bugfixes (log messages):
    - Correctly spell "connect" in a log message on failure to create a
      controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
      0.2.3.2-alpha.
    - Fix a typo in a log message in rend_service_rendezvous_has_opened().
      Fixes bug 4856; bugfix on Tor 0.0.6.
    - Fix the log message describing how we work around discovering
      that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
      4837; bugfix on 0.2.2.9-alpha.
    - When logging about a disallowed .exit name, do not also call it
      an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.

  o Minor bugfixes (build fixes):
    - During configure, detect when we're building with clang version
      3.0 or lower and disable the -Wnormalized=id and -Woverride-init
      CFLAGS. clang doesn't support them yet.
    - During configure, search for library containing cos function as
      libm lives in libcore on some platforms (BeOS/Haiku). Linking
      against libm was hard-coded before. Fixes the first part of bug
      4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
      Pedersen.
    - Detect attempts to build Tor on (as yet hypothetical) versions
      of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
      fix for bug 4533. Bugfix on 0.2.2.28-beta.
    - Preprocessor directives should not be put inside the arguments
      of a macro. This would break compilation with GCC releases prior
      to version 3.3. We would never recommend such an old GCC version,
      but it is apparently required for binary compatibility on some
      platforms (namely, certain builds of Haiku). Fixes the other part
      of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
      Hebnes Pedersen.

  o Minor bugfixes (other):
    - Older Linux kernels erroneously respond to strange nmap behavior
      by having accept() return successfully with a zero-length
      socket. When this happens, just close the connection. Previously,
      we would try harder to learn the remote address: but there was
      no such remote address to learn, and our method for trying to
      learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
      on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
    - Fix null-pointer access that could occur if TLS allocation failed.
      Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
      erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
      accidentally been reverted.
    - Fix our implementation of crypto_random_hostname() so it can't
      overflow on ridiculously large inputs. (No Tor version has ever
      provided this kind of bad inputs, but let's be correct in depth.)
      Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
    - Find more places in the code that should have been testing for
      invalid sockets using the SOCKET_OK macro. Required for a fix
      for bug 4533. Bugfix on 0.2.2.28-beta.
    - Fix an assertion failure when, while running with bufferevents, a
      connection finishes connecting after it is marked for close, but
      before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
    - test_util_spawn_background_ok() hardcoded the expected value
      for ENOENT to 2. This isn't portable as error numbers are
      platform specific, and particularly the hurd has ENOENT at
      0x40000002. Construct expected string at runtime, using the correct
      value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
    - Reject attempts to disable DisableDebuggerAttachment while Tor is
      running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
    - Use an appropriate-width type for sockets in tor-fw-helper on
      win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.

  o Feature removal:
    - When sending or relaying a RELAY_EARLY cell, we used to convert
      it to a RELAY cell if the connection was using the v1 link
      protocol. This was a workaround for older versions of Tor, which
      didn't handle RELAY_EARLY cells properly. Now that all supported
      versions can handle RELAY_EARLY cells, and now that we're enforcing
      the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
      remove this workaround. Addresses bug 4786.

  o Code simplifications and refactoring:
    - Use OpenSSL's built-in SSL_state_string_long() instead of our
      own homebrewed ssl_state_to_string() replacement. Patch from
      Emile Snyder. Fixes bug 4653.
    - Use macros to indicate OpenSSL versions, so we don't need to worry
      about accidental hexadecimal bit shifts.
    - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
      supported).
    - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
    - Use the smartlist_add_asprintf() alias more consistently.
    - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
      invalid value, rather than just -1.
    - Rename a handful of old identifiers, mostly related to crypto
      structures and crypto functions. By convention, our "create an
      object" functions are called "type_new()", our "free an object"
      functions are called "type_free()", and our types indicate that
      they are types only with a final "_t". But a handful of older
      types and functions broke these rules, with function names like
      "type_create" or "subsystem_op_type", or with type names like
      type_env_t.


Changes in version 0.2.3.10-alpha - 2011-12-16
  Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
  Tor's buffers code. Absolutely everybody should upgrade.

  The bug relied on an incorrect calculation when making data continuous
  in one of our IO buffers, if the first chunk of the buffer was
  misaligned by just the wrong amount. The miscalculation would allow an
  attacker to overflow a piece of heap-allocated memory. To mount this
  attack, the attacker would need to either open a SOCKS connection to
  Tor's SocksPort (usually restricted to localhost), or target a Tor
  instance configured to make its connections through a SOCKS proxy
  (which Tor does not do by default).

  Good security practice requires that all heap-overflow bugs should be
  presumed to be exploitable until proven otherwise, so we are treating
  this as a potential code execution attack. Please upgrade immediately!
  This bug does not affect bufferevents-based builds of Tor. Special
  thanks to "Vektor" for reporting this issue to us!

  This release also contains a few minor bugfixes for issues discovered
  in 0.2.3.9-alpha.

  o Major bugfixes:
    - Fix a heap overflow bug that could occur when trying to pull
      data into the first chunk of a buffer, when that chunk had
      already had some data drained from it. Fixes CVE-2011-2778;
      bugfix on 0.2.0.16-alpha. Reported by "Vektor".

  o Minor bugfixes:
    - If we can't attach streams to a rendezvous circuit when we
      finish connecting to a hidden service, clear the rendezvous
      circuit's stream-isolation state and try to attach streams
      again. Previously, we cleared rendezvous circuits' isolation
      state either too early (if they were freshly built) or not at all
      (if they had been built earlier and were cannibalized). Bugfix on
      0.2.3.3-alpha; fixes bug 4655.
    - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
      0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
    - Fix an assertion failure when a relay with accounting enabled
      starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.

  o Minor features:
    - Update to the December 6 2011 Maxmind GeoLite Country database.


Changes in version 0.2.2.35 - 2011-12-16
  Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
  buffers code. Absolutely everybody should upgrade.

  The bug relied on an incorrect calculation when making data continuous
  in one of our IO buffers, if the first chunk of the buffer was
  misaligned by just the wrong amount. The miscalculation would allow an
  attacker to overflow a piece of heap-allocated memory. To mount this
  attack, the attacker would need to either open a SOCKS connection to
  Tor's SocksPort (usually restricted to localhost), or target a Tor
  instance configured to make its connections through a SOCKS proxy
  (which Tor does not do by default).

  Good security practice requires that all heap-overflow bugs should be
  presumed to be exploitable until proven otherwise, so we are treating
  this as a potential code execution attack. Please upgrade immediately!
  This bug does not affect bufferevents-based builds of Tor. Special
  thanks to "Vektor" for reporting this issue to us!

  Tor 0.2.2.35 also fixes several bugs in previous versions, including
  crash bugs for unusual configurations, and a long-term bug that
  would prevent Tor from starting on Windows machines with draconian
  AV software.

  With this release, we remind everyone that 0.2.0.x has reached its
  formal end-of-life. Those Tor versions have many known flaws, and
  nobody should be using them. You should upgrade -- ideally to the
  0.2.2.x series. If you're using a Linux or BSD and its packages are
  obsolete, stop using those packages and upgrade anyway.

  The Tor 0.2.1.x series is also approaching its end-of-life: it will no
  longer receive support after some time in early 2012.

  o Major bugfixes:
    - Fix a heap overflow bug that could occur when trying to pull
      data into the first chunk of a buffer, when that chunk had
      already had some data drained from it. Fixes CVE-2011-2778;
      bugfix on 0.2.0.16-alpha. Reported by "Vektor".
    - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
      that it doesn't attempt to allocate a socketpair. This could cause
      some problems on Windows systems with overzealous firewalls. Fix for
      bug 4457; workaround for Libevent versions 2.0.1-alpha through
      2.0.15-stable.
    - If we mark an OR connection for close based on a cell we process,
      don't process any further cells on it. We already avoid further
      reads on marked-for-close connections, but now we also discard the
      cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
      which was the first version where we might mark a connection for
      close based on processing a cell on it.
    - Correctly sanity-check that we don't underflow on a memory
      allocation (and then assert) for hidden service introduction
      point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
      bugfix on 0.2.1.5-alpha.
    - Fix a memory leak when we check whether a hidden service
      descriptor has any usable introduction points left. Fixes bug
      4424. Bugfix on 0.2.2.25-alpha.
    - Don't crash when we're running as a relay and don't have a GeoIP
      file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
      we've had in the 0.2.3.x branch already.
    - When running as a client, do not print a misleading (and plain
      wrong) log message that we're collecting "directory request"
      statistics: clients don't collect statistics. Also don't create a
      useless (because empty) stats file in the stats/ directory. Fixes
      bug 4353; bugfix on 0.2.2.34.

  o Minor bugfixes:
    - Detect failure to initialize Libevent. This fix provides better
      detection for future instances of bug 4457.
    - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
      function. This was eating up hideously large amounts of time on some
      busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
    - Resolve an integer overflow bug in smartlist_ensure_capacity().
      Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
      Mansour Moufid.
    - Don't warn about unused log_mutex in log.c when building with
      --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
      0.1.0.6-rc which introduced --disable-threads.
    - When configuring, starting, or stopping an NT service, stop
      immediately after the service configuration attempt has succeeded
      or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
    - When sending a NETINFO cell, include the original address
      received for the other side, not its canonical address. Found
      by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
    - Fix a typo in a hibernation-related log message. Fixes bug 4331;
      bugfix on 0.2.2.23-alpha; found by "tmpname0901".
    - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
      occurred when a client tried to fetch a descriptor for a bridge
      in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
    - Backport fixes for a pair of compilation warnings on Windows.
      Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
    - If we had ever tried to call tor_addr_to_str on an address of
      unknown type, we would have done a strdup on an uninitialized
      buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
      Reported by "troll_un".
    - Correctly detect and handle transient lookup failures from
      tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
      Reported by "troll_un".
    - Fix null-pointer access that could occur if TLS allocation failed.
      Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
    - Use tor_socket_t type for listener argument to accept(). Fixes bug
      4535; bugfix on 0.2.2.28-beta. Found by "troll_un".

  o Minor features:
    - Add two new config options for directory authorities:
      AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
      Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
      that is always sufficient to satisfy the bandwidth requirement for
      the Guard flag. Now it will be easier for researchers to simulate
      Tor networks with different values. Resolves ticket 4484.
    - When Tor ignores a hidden service specified in its configuration,
      include the hidden service's directory in the warning message.
      Previously, we would only tell the user that some hidden service
      was ignored. Bugfix on 0.0.6; fixes bug 4426.
    - Update to the December 6 2011 Maxmind GeoLite Country database.

  o Packaging changes:
    - Make it easier to automate expert package builds on Windows,
      by removing an absolute path from makensis.exe command.


Changes in version 0.2.1.32 - 2011-12-16
  Tor 0.2.1.32 backports important security and privacy fixes for
  oldstable. This release is intended only for package maintainers and
  others who cannot use the 0.2.2 stable series. All others should be
  using Tor 0.2.2.x or newer.

  The Tor 0.2.1.x series will reach formal end-of-life some time in
  early 2012; we will stop releasing patches for it then.

  o Major bugfixes (also included in 0.2.2.x):
    - Correctly sanity-check that we don't underflow on a memory
      allocation (and then assert) for hidden service introduction
      point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
      bugfix on 0.2.1.5-alpha.
    - Fix a heap overflow bug that could occur when trying to pull
      data into the first chunk of a buffer, when that chunk had
      already had some data drained from it. Fixes CVE-2011-2778;
      bugfix on 0.2.0.16-alpha. Reported by "Vektor".

  o Minor features:
    - Update to the December 6 2011 Maxmind GeoLite Country database.


Changes in version 0.2.3.9-alpha - 2011-12-08
  Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
  a "DisableNetwork" security feature that bundles can use to avoid
  touching the network until bridges are configured, moves forward on
  the pluggable transport design, fixes a flaw in the hidden service
  design that unnecessarily prevented clients with wrong clocks from
  reaching hidden services, and fixes a wide variety of other issues.

  o Major features:
    - Clients can now connect to private bridges over IPv6. Bridges
      still need at least one IPv4 address in order to connect to
      other relays. Note that we don't yet handle the case where the
      user has two bridge lines for the same bridge (one IPv4, one
      IPv6). Implements parts of proposal 186.
    - New "DisableNetwork" config option to prevent Tor from launching any
      connections or accepting any connections except on a control port.
      Bundles and controllers can set this option before letting Tor talk
      to the rest of the network, for example to prevent any connections
      to a non-bridge address. Packages like Orbot can also use this
      option to instruct Tor to save power when the network is off.
    - Clients and bridges can now be configured to use a separate
      "transport" proxy. This approach makes the censorship arms race
      easier by allowing bridges to use protocol obfuscation plugins. It
      implements the "managed proxy" part of proposal 180 (ticket 3472).
    - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
      implementation. It makes AES_CTR about 7% faster than our old one
      (which was about 10% faster than the one OpenSSL used to provide).
      Resolves ticket 4526.
    - Add a "tor2web mode" for clients that want to connect to hidden
      services non-anonymously (and possibly more quickly). As a safety
      measure to try to keep users from turning this on without knowing
      what they are doing, tor2web mode must be explicitly enabled at
      compile time, and a copy of Tor compiled to run in tor2web mode
      cannot be used as a normal Tor client. Implements feature 2553.
    - Add experimental support for running on Windows with IOCP and no
      kernel-space socket buffers. This feature is controlled by a new
      "UserspaceIOCPBuffers" config option (off by default), which has
      no effect unless Tor has been built with support for bufferevents,
      is running on Windows, and has enabled IOCP. This may, in the long
      run, help solve or mitigate bug 98.
    - Use a more secure consensus parameter voting algorithm. Now at
      least three directory authorities or a majority of them must
      vote on a given parameter before it will be included in the
      consensus. Implements proposal 178.

  o Major bugfixes:
    - Hidden services now ignore the timestamps on INTRODUCE2 cells.
      They used to check that the timestamp was within 30 minutes
      of their system clock, so they could cap the size of their
      replay-detection cache, but that approach unnecessarily refused
      service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
      the v3 intro-point protocol (the first one which sent a timestamp
      field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
    - Only use the EVP interface when AES acceleration is enabled,
      to avoid a 5-7% performance regression. Resolves issue 4525;
      bugfix on 0.2.3.8-alpha.

  o Privacy/anonymity features (bridge detection):
    - Make bridge SSL certificates a bit more stealthy by using random
      serial numbers, in the same fashion as OpenSSL when generating
      self-signed certificates. Implements ticket 4584.
    - Introduce a new config option "DynamicDHGroups", enabled by
      default, which provides each bridge with a unique prime DH modulus
      to be used during SSL handshakes. This option attempts to help
      against censors who might use the Apache DH modulus as a static
      identifier for bridges. Addresses ticket 4548.

  o Minor features (new/different config options):
    - New configuration option "DisableDebuggerAttachment" (on by default)
      to prevent basic debugging attachment attempts by other processes.
      Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
    - Allow MapAddress directives to specify matches against super-domains,
      as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
      Implements issue 933.
    - Slightly change behavior of "list" options (that is, config
      options that can appear more than once) when they appear both in
      torrc and on the command line. Previously, the command-line options
      would be appended to the ones from torrc. Now, the command-line
      options override the torrc options entirely. This new behavior
      allows the user to override list options (like exit policies and
      ports to listen on) from the command line, rather than simply
      appending to the list.
    - You can get the old (appending) command-line behavior for "list"
      options by prefixing the option name with a "+".
    - You can remove all the values for a "list" option from the command
      line without adding any new ones by prefixing the option name
      with a "/".
    - Add experimental support for a "defaults" torrc file to be parsed
      before the regular torrc. Torrc options override the defaults file's
      options in the same way that the command line overrides the torrc.
      The SAVECONF controller command saves only those options which
      differ between the current configuration and the defaults file. HUP
      reloads both files. (Note: This is an experimental feature; its
      behavior will probably be refined in future 0.2.3.x-alpha versions
      to better meet packagers' needs.) Implements task 4552.

  o Minor features:
    - Try to make the introductory warning message that Tor prints on
      startup more useful for actually finding help and information.
      Resolves ticket 2474.
    - Running "make version" now displays the version of Tor that
      we're about to build. Idea from katmagic; resolves issue 4400.
    - Expire old or over-used hidden service introduction points.
      Required by fix for bug 3460.
    - Move the replay-detection cache for the RSA-encrypted parts of
      INTRODUCE2 cells to the introduction point data structures.
      Previously, we would use one replay-detection cache per hidden
      service. Required by fix for bug 3460.
    - Reduce the lifetime of elements of hidden services' Diffie-Hellman
      public key replay-detection cache from 60 minutes to 5 minutes. This
      replay-detection cache is now used only to detect multiple
      INTRODUCE2 cells specifying the same rendezvous point, so we can
      avoid launching multiple simultaneous attempts to connect to it.

  o Minor bugfixes (on Tor 0.2.2.x and earlier):
    - Resolve an integer overflow bug in smartlist_ensure_capacity().
      Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
      Mansour Moufid.
    - Fix a minor formatting issue in one of tor-gencert's error messages.
      Fixes bug 4574.
    - Prevent a false positive from the check-spaces script, by disabling
      the "whitespace between function name and (" check for functions
      named 'op()'.
    - Fix a log message suggesting that people contact a non-existent
      email address. Fixes bug 3448.
    - Fix null-pointer access that could occur if TLS allocation failed.
      Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
    - Report a real bootstrap problem to the controller on router
      identity mismatch. Previously we just said "foo", which probably
      made a lot of sense at the time. Fixes bug 4169; bugfix on
      0.2.1.1-alpha.
    - If we had ever tried to call tor_addr_to_str() on an address of
      unknown type, we would have done a strdup() on an uninitialized
      buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
      Reported by "troll_un".
    - Correctly detect and handle transient lookup failures from
      tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
      Reported by "troll_un".
    - Use tor_socket_t type for listener argument to accept(). Fixes bug
      4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
    - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
      bug 4532; found by "troll_un".

  o Minor bugfixes (on Tor 0.2.3.x):
    - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
      fixes bug 4554.
    - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
      circuit for use as a hidden service client's rendezvous point.
      Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
      with help from wanoskarnet.
    - Restore behavior of overriding SocksPort, ORPort, and similar
      options from the command line. Bugfix on 0.2.3.3-alpha.

  o Build fixes:
    - Properly handle the case where the build-tree is not the same
      as the source tree when generating src/common/common_sha1.i,
      src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
      bugfix on 0.2.0.1-alpha.

  o Code simplifications, cleanups, and refactorings:
    - Remove the pure attribute from all functions that used it
      previously. In many cases we assigned it incorrectly, because the
      functions might assert or call impure functions, and we don't have
      evidence that keeping the pure attribute is worthwhile. Implements
      changes suggested in ticket 4421.
    - Remove some dead code spotted by coverity. Fixes cid 432.
      Bugfix on 0.2.3.1-alpha, closes bug 4637.


Changes in version 0.2.3.8-alpha - 2011-11-22
  Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
  socketpair-related bug that has been bothering Windows users. It adds
  support to serve microdescriptors to controllers, so Vidalia's network
  map can resume listing relays (once Vidalia implements its side),
  and adds better support for hardware AES acceleration. Finally, it
  starts the process of adjusting the bandwidth cutoff for getting the
  "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
  that tiny relays harm performance more than they help network capacity.

  o Major bugfixes:
    - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
      that it doesn't attempt to allocate a socketpair. This could cause
      some problems on Windows systems with overzealous firewalls. Fix for
      bug 4457; workaround for Libevent versions 2.0.1-alpha through
      2.0.15-stable.
    - Correctly sanity-check that we don't underflow on a memory
      allocation (and then assert) for hidden service introduction
      point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
      bugfix on 0.2.1.5-alpha.
    - Remove the artificially low cutoff of 20KB to guarantee the Fast
      flag. In the past few years the average relay speed has picked
      up, and while the "top 7/8 of the network get the Fast flag" and
      "all relays with 20KB or more of capacity get the Fast flag" rules
      used to have the same result, now the top 7/8 of the network has
      a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
    - Fix a rare assertion failure when checking whether a v0 hidden
      service descriptor has any usable introduction points left, and
      we don't have enough information to build a circuit to the first
      intro point named in the descriptor. The HS client code in
      0.2.3.x no longer uses v0 HS descriptors, but this assertion can
      trigger on (and crash) v0 HS authorities. Fixes bug 4411.
      Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
    - Make bridge authorities not crash when they are asked for their own
      descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
    - When running as a client, do not print a misleading (and plain
      wrong) log message that we're collecting "directory request"
      statistics: clients don't collect statistics. Also don't create a
      useless (because empty) stats file in the stats/ directory. Fixes
      bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.

  o Major features:
    - Allow Tor controllers like Vidalia to obtain the microdescriptor
      for a relay by identity digest or nickname. Previously,
      microdescriptors were only available by their own digests, so a
      controller would have to ask for and parse the whole microdescriptor
      consensus in order to look up a single relay's microdesc. Fixes
      bug 3832; bugfix on 0.2.3.1-alpha.
    - Use OpenSSL's EVP interface for AES encryption, so that all AES
      operations can use hardware acceleration (if present). Resolves
      ticket 4442.

  o Minor bugfixes (on 0.2.2.x and earlier):
    - Detect failure to initialize Libevent. This fix provides better
      detection for future instances of bug 4457.
    - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
      function. This was eating up hideously large amounts of time on some
      busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
    - Don't warn about unused log_mutex in log.c when building with
      --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
      0.1.0.6-rc which introduced --disable-threads.
    - Allow manual 'authenticate' commands to the controller interface
      from netcat (nc) as well as telnet. We were rejecting them because
      they didn't come with the expected whitespace at the end of the
      command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
    - Fix some (not actually triggerable) buffer size checks in usage of
      tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
      by Anders Sundman.
    - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
      bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
    - When configuring, starting, or stopping an NT service, stop
      immediately after the service configuration attempt has succeeded
      or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
    - When sending a NETINFO cell, include the original address
      received for the other side, not its canonical address. Found
      by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
    - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
      can pick them up when the tests aren't disabled. Bugfix on
      0.2.2.4-alpha which introduced tinytest.
    - Fix a memory leak when we check whether a hidden service
      descriptor has any usable introduction points left. Fixes bug
      4424. Bugfix on 0.2.2.25-alpha.
    - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
      occurred when a client tried to fetch a descriptor for a bridge
      in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.

  o Minor bugfixes (on 0.2.3.x):
    - Make util unit tests build correctly with MSVC. Bugfix on
      0.2.3.3-alpha. Patch by Gisle Vanem.
    - Successfully detect AUTH_CHALLENGE cells with no recognized
      authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
      Found by frosty_un.
    - If a relay receives an AUTH_CHALLENGE cell it can't answer,
      it should still send a NETINFO cell to allow the connection to
      become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
      "frosty".
    - Log less loudly when we get an invalid authentication certificate
      from a source other than a directory authority: it's not unusual
      to see invalid certs because of clock skew. Fixes bug 4370; bugfix
      on 0.2.3.6-alpha.
    - Tolerate servers with more clock skew in their authentication
      certificates than previously. Fixes bug 4371; bugfix on
      0.2.3.6-alpha.
    - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
      on 0.2.3.4-alpha and 0.2.3.6-alpha.

  o Minor features:
    - Add two new config options for directory authorities:
      AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
      Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
      that is always sufficient to satisfy the bandwidth requirement for
      the Guard flag. Now it will be easier for researchers to simulate
      Tor networks with different values. Resolves ticket 4484.
    - When Tor ignores a hidden service specified in its configuration,
      include the hidden service's directory in the warning message.
      Previously, we would only tell the user that some hidden service
      was ignored. Bugfix on 0.0.6; fixes bug 4426.
    - When we fail to initialize Libevent, retry with IOCP disabled so we
      don't need to turn on multi-threading support in Libevent, which in
      turn requires a working socketpair(). This is a workaround for bug
      4457, which affects Libevent versions from 2.0.1-alpha through
      2.0.15-stable.
    - Detect when we try to build on a platform that doesn't define
      AF_UNSPEC to 0. We don't work there, so refuse to compile.
    - Update to the November 1 2011 Maxmind GeoLite Country database.

  o Packaging changes:
    - Make it easier to automate expert package builds on Windows,
      by removing an absolute path from makensis.exe command.

  o Code simplifications and refactoring:
    - Remove some redundant #include directives throughout the code.
      Patch from Andrea Gelmini.
    - Unconditionally use OpenSSL's AES implementation instead of our
      old built-in one. OpenSSL's AES has been better for a while, and
      relatively few servers should still be on any version of OpenSSL
      that doesn't have good optimized assembly AES.
    - Use the name "CERTS" consistently to refer to the new cell type;
      we were calling it CERT in some places and CERTS in others.

  o Testing:
    - Numerous new unit tests for functions in util.c and address.c by
      Anders Sundman.
    - The long-disabled benchmark tests are now split into their own
      ./src/test/bench binary.
    - The benchmark tests can now use more accurate timers than
      gettimeofday() when such timers are available.


Changes in version 0.2.3.7-alpha - 2011-10-30
  Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
  the new v3 handshake. It also resolves yet another bridge address
  enumeration issue.

  o Major bugfixes:
    - If we mark an OR connection for close based on a cell we process,
      don't process any further cells on it. We already avoid further
      reads on marked-for-close connections, but now we also discard the
      cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
      which was the first version where we might mark a connection for
      close based on processing a cell on it.
    - Fix a double-free bug that would occur when we received an invalid
      certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
      bugfix on 0.2.3.6-alpha.
    - Bridges no longer include their address in NETINFO cells on outgoing
      OR connections, to allow them to blend in better with clients.
      Removes another avenue for enumerating bridges. Reported by
      "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
      cells were introduced.

  o Trivial fixes:
    - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
      bugfix on 0.2.2.23-alpha; found by "tmpname0901".


Changes in version 0.2.3.6-alpha - 2011-10-26
  Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
  anonymity vulnerability where an attacker can deanonymize Tor
  users. Everybody should upgrade.

  This release also features support for a new v3 connection handshake
  protocol, and fixes to make hidden service connections more robust.

  o Major features:
    - Implement a new handshake protocol (v3) for authenticating Tors to
      each other over TLS. It should be more resistant to fingerprinting
      than previous protocols, and should require less TLS hacking for
      future Tor implementations. Implements proposal 176.
    - Allow variable-length padding cells to disguise the length of
      Tor's TLS records. Implements part of proposal 184.

  o Privacy/anonymity fixes (clients):
    - Clients and bridges no longer send TLS certificate chains on
      outgoing OR connections. Previously, each client or bridge would
      use the same cert chain for all outgoing OR connections until
      its IP address changes, which allowed any relay that the client
      or bridge contacted to determine which entry guards it is using.
      Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
    - If a relay receives a CREATE_FAST cell on a TLS connection, it
      no longer considers that connection as suitable for satisfying a
      circuit EXTEND request. Now relays can protect clients from the
      CVE-2011-2768 issue even if the clients haven't upgraded yet.
    - Directory authorities no longer assign the Guard flag to relays
      that haven't upgraded to the above "refuse EXTEND requests
      to client connections" fix. Now directory authorities can
      protect clients from the CVE-2011-2768 issue even if neither
      the clients nor the relays have upgraded yet. There's a new
      "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
      to let us transition smoothly, else tomorrow there would be no
      guard relays.

  o Major bugfixes (hidden services):
    - Improve hidden service robustness: when an attempt to connect to
      a hidden service ends, be willing to refetch its hidden service
      descriptors from each of the HSDir relays responsible for them
      immediately. Previously, we would not consider refetching the
      service's descriptors from each HSDir for 15 minutes after the last
      fetch, which was inconvenient if the hidden service was not running
      during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
    - When one of a hidden service's introduction points appears to be
      unreachable, stop trying it. Previously, we would keep trying
      to build circuits to the introduction point until we lost the
      descriptor, usually because the user gave up and restarted Tor.
      Partly fixes bug 3825.
    - Don't launch a useless circuit after failing to use one of a
      hidden service's introduction points. Previously, we would
      launch a new introduction circuit, but not set the hidden service
      which that circuit was intended to connect to, so it would never
      actually be used. A different piece of code would then create a
      new introduction circuit correctly. Bug reported by katmagic and
      found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.

  o Major bugfixes (other):
    - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
      that they initiated. Relays could distinguish incoming bridge
      connections from client connections, creating another avenue for
      enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
      Found by "frosty_un".
    - Don't update the AccountingSoftLimitHitAt state file entry whenever
      tor gets started. This prevents a wrong average bandwidth
      estimate, which would cause relays to always start a new accounting
      interval at the earliest possible moment. Fixes bug 2003; bugfix
      on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
      immensely in tracking this bug down.
    - Fix a crash bug when changing node restrictions while a DNS lookup
      is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
      by "Tey'".

  o Minor bugfixes (on 0.2.2.x and earlier):
    - When a hidden service turns an extra service-side introduction
      circuit into a general-purpose circuit, free the rend_data and
      intro_key fields first, so we won't leak memory if the circuit
      is cannibalized for use as another service-side introduction
      circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
    - Rephrase the log message emitted if the TestSocks check is
      successful. Patch from Fabian Keil; fixes bug 4094.
    - Bridges now skip DNS self-tests, to act a little more stealthily.
      Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
      bridges. Patch by "warms0x".
    - Remove a confusing dollar sign from the example fingerprint in the
      man page, and also make the example fingerprint a valid one. Fixes
      bug 4309; bugfix on 0.2.1.3-alpha.
    - Fix internal bug-checking logic that was supposed to catch
      failures in digest generation so that it will fail more robustly
      if we ask for a nonexistent algorithm. Found by Coverity Scan.
      Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
    - Report any failure in init_keys() calls launched because our
      IP address has changed. Spotted by Coverity Scan. Bugfix on
      0.1.1.4-alpha; fixes CID 484.

  o Minor bugfixes (on 0.2.3.x):
    - Fix a bug in configure.in that kept it from building a configure
      script with autoconf versions earlier than 2.61. Fixes bug 2430;
      bugfix on 0.2.3.1-alpha.
    - Don't warn users that they are exposing a client port to the
      Internet if they have specified an RFC1918 address. Previously,
      we would warn if the user had specified any non-loopback
      address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
    - Fix memory leaks in the failing cases of the new SocksPort and
      ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
      fixes coverity CIDs 485, 486, and 487.

  o Minor features:
    - When a hidden service's introduction point times out, consider
      trying it again during the next attempt to connect to the
      HS. Previously, we would not try it again unless a newly fetched
      descriptor contained it. Required by fixes for bugs 1297 and 3825.
    - The next version of Windows will be called Windows 8, and it has
      a major version of 6, minor version of 2. Correctly identify that
      version instead of calling it "Very recent version". Resolves
      ticket 4153; reported by funkstar.
    - The Bridge Authority now writes statistics on how many bridge
      descriptors it gave out in total, and how many unique descriptors
      it gave out. It also lists how often the most and least commonly
      fetched descriptors were given out, as well as the median and
      25th/75th percentile. Implements tickets 4200 and 4294.
    - Update to the October 4 2011 Maxmind GeoLite Country database.

  o Code simplifications and refactoring:
    - Remove some old code to remember statistics about which descriptors
      we've served as a directory mirror. The feature wasn't used and
      is outdated now that microdescriptors are around.
    - Rename Tor functions that turn strings into addresses, so that
      "parse" indicates that no hostname resolution occurs, and
      "lookup" indicates that hostname resolution may occur. This
      should help prevent mistakes in the future. Fixes bug 3512.


Changes in version 0.2.2.34 - 2011-10-26
  Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
  can deanonymize Tor users. Everybody should upgrade.

  The attack relies on four components: 1) Clients reuse their TLS cert
  when talking to different relays, so relays can recognize a user by
  the identity key in her cert. 2) An attacker who knows the client's
  identity key can probe each guard relay to see if that identity key
  is connected to that guard relay right now. 3) A variety of active
  attacks in the literature (starting from "Low-Cost Traffic Analysis
  of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
  discover the guard relays that a Tor user visiting the website is using.
  4) Clients typically pick three guards at random, so the set of guards
  for a given user could well be a unique fingerprint for her. This
  release fixes components #1 and #2, which is enough to block the attack;
  the other two remain as open research problems. Special thanks to
  "frosty_un" for reporting the issue to us!

  Clients should upgrade so they are no longer recognizable by the TLS
  certs they present. Relays should upgrade so they no longer allow a
  remote attacker to probe them to test whether unpatched clients are
  currently connected to them.

  This release also fixes several vulnerabilities that allow an attacker
  to enumerate bridge relays. Some bridge enumeration attacks still
  remain; see for example proposal 188.

  o Privacy/anonymity fixes (clients):
    - Clients and bridges no longer send TLS certificate chains on
      outgoing OR connections. Previously, each client or bridge would
      use the same cert chain for all outgoing OR connections until
      its IP address changes, which allowed any relay that the client
      or bridge contacted to determine which entry guards it is using.
      Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
    - If a relay receives a CREATE_FAST cell on a TLS connection, it
      no longer considers that connection as suitable for satisfying a
      circuit EXTEND request. Now relays can protect clients from the
      CVE-2011-2768 issue even if the clients haven't upgraded yet.
    - Directory authorities no longer assign the Guard flag to relays
      that haven't upgraded to the above "refuse EXTEND requests
      to client connections" fix. Now directory authorities can
      protect clients from the CVE-2011-2768 issue even if neither
      the clients nor the relays have upgraded yet. There's a new
      "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
      to let us transition smoothly, else tomorrow there would be no
      guard relays.

  o Privacy/anonymity fixes (bridge enumeration):
    - Bridge relays now do their directory fetches inside Tor TLS
      connections, like all the other clients do, rather than connecting
      directly to the DirPort like public relays do. Removes another
      avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
    - Bridges relays now build circuits for themselves in a more similar
      way to how clients build them. Removes another avenue for
      enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
      when bridges were introduced.
    - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
      that they initiated. Relays could distinguish incoming bridge
      connections from client connections, creating another avenue for
      enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
      Found by "frosty_un".

  o Major bugfixes:
    - Fix a crash bug when changing node restrictions while a DNS lookup
      is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
      by "Tey'".
    - Don't launch a useless circuit after failing to use one of a
      hidden service's introduction points. Previously, we would
      launch a new introduction circuit, but not set the hidden service
      which that circuit was intended to connect to, so it would never
      actually be used. A different piece of code would then create a
      new introduction circuit correctly. Bug reported by katmagic and
      found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.

  o Minor bugfixes:
    - Change an integer overflow check in the OpenBSD_Malloc code so
      that GCC is less likely to eliminate it as impossible. Patch
      from Mansour Moufid. Fixes bug 4059.
    - When a hidden service turns an extra service-side introduction
      circuit into a general-purpose circuit, free the rend_data and
      intro_key fields first, so we won't leak memory if the circuit
      is cannibalized for use as another service-side introduction
      circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
    - Bridges now skip DNS self-tests, to act a little more stealthily.
      Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
      bridges. Patch by "warms0x".
    - Fix internal bug-checking logic that was supposed to catch
      failures in digest generation so that it will fail more robustly
      if we ask for a nonexistent algorithm. Found by Coverity Scan.
      Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
    - Report any failure in init_keys() calls launched because our
      IP address has changed. Spotted by Coverity Scan. Bugfix on
      0.1.1.4-alpha; fixes CID 484.

  o Minor bugfixes (log messages and documentation):
    - Remove a confusing dollar sign from the example fingerprint in the
      man page, and also make the example fingerprint a valid one. Fixes
      bug 4309; bugfix on 0.2.1.3-alpha.
    - The next version of Windows will be called Windows 8, and it has
      a major version of 6, minor version of 2. Correctly identify that
      version instead of calling it "Very recent version". Resolves
      ticket 4153; reported by funkstar.
    - Downgrade log messages about circuit timeout calibration from
      "notice" to "info": they don't require or suggest any human
      intervention. Patch from Tom Lowenthal. Fixes bug 4063;
      bugfix on 0.2.2.14-alpha.

  o Minor features:
    - Turn on directory request statistics by default and include them in
      extra-info descriptors. Don't break if we have no GeoIP database.
      Backported from 0.2.3.1-alpha; implements ticket 3951.
    - Update to the October 4 2011 Maxmind GeoLite Country database.


Changes in version 0.2.1.31 - 2011-10-26
  Tor 0.2.1.31 backports important security and privacy fixes for
  oldstable. This release is intended only for package maintainers and
  others who cannot use the 0.2.2 stable series. All others should be
  using Tor 0.2.2.x or newer.

  o Security fixes (also included in 0.2.2.x):
    - Replace all potentially sensitive memory comparison operations
      with versions whose runtime does not depend on the data being
      compared. This will help resist a class of attacks where an
      adversary can use variations in timing information to learn
      sensitive data. Fix for one case of bug 3122. (Safe memcmp
      implementation by Robert Ransom based partially on code by DJB.)
    - Fix an assert in parsing router descriptors containing IPv6
      addresses. This one took down the directory authorities when
      somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.

  o Privacy/anonymity fixes (also included in 0.2.2.x):
    - Clients and bridges no longer send TLS certificate chains on
      outgoing OR connections. Previously, each client or bridge would
      use the same cert chain for all outgoing OR connections until
      its IP address changes, which allowed any relay that the client
      or bridge contacted to determine which entry guards it is using.
      Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
    - If a relay receives a CREATE_FAST cell on a TLS connection, it
      no longer considers that connection as suitable for satisfying a
      circuit EXTEND request. Now relays can protect clients from the
      CVE-2011-2768 issue even if the clients haven't upgraded yet.
    - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
      that they initiated. Relays could distinguish incoming bridge
      connections from client connections, creating another avenue for
      enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
      Found by "frosty_un".
    - When receiving a hidden service descriptor, check that it is for
      the hidden service we wanted. Previously, Tor would store any
      hidden service descriptors that a directory gave it, whether it
      wanted them or not. This wouldn't have let an attacker impersonate
      a hidden service, but it did let directories pre-seed a client
      with descriptors that it didn't want. Bugfix on 0.0.6.
    - Avoid linkability based on cached hidden service descriptors: forget
      all hidden service descriptors cached as a client when processing a
      SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
    - Make the bridge directory authority refuse to answer directory
      requests for "all" descriptors. It used to include bridge
      descriptors in its answer, which was a major information leak.
      Found by "piebeer". Bugfix on 0.2.0.3-alpha.
    - Don't attach new streams to old rendezvous circuits after SIGNAL
      NEWNYM. Previously, we would keep using an existing rendezvous
      circuit if it remained open (i.e. if it were kept open by a
      long-lived stream, or if a new stream were attached to it before
      Tor could notice that it was old and no longer in use). Bugfix on
      0.1.1.15-rc; fixes bug 3375.

  o Minor bugfixes (also included in 0.2.2.x):
    - When we restart our relay, we might get a successful connection
      from the outside before we've started our reachability tests,
      triggering a warning: "ORPort found reachable, but I have no
      routerinfo yet. Failing to inform controller of success." This
      bug was harmless unless Tor is running under a controller
      like Vidalia, in which case the controller would never get a
      REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
      fixes bug 1172.
    - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
      enabled. Fixes bug 1526.
    - Remove undocumented option "-F" from tor-resolve: it hasn't done
      anything since 0.2.1.16-rc.
    - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
      None of the cases where we did this before were wrong, but by making
      this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
    - Fix a rare crash bug that could occur when a client was configured
      with a large number of bridges. Fixes bug 2629; bugfix on
      0.2.1.2-alpha. Bugfix by trac user "shitlei".
    - Correct the warning displayed when a rendezvous descriptor exceeds
      the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
      John Brooks.
    - Fix an uncommon assertion failure when running with DNSPort under
      heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
    - When warning about missing zlib development packages during compile,
      give the correct package names. Bugfix on 0.2.0.1-alpha.
    - Require that introduction point keys and onion keys have public
      exponent 65537. Bugfix on 0.2.0.10-alpha.
    - Do not crash when our configuration file becomes unreadable, for
      example due to a permissions change, between when we start up
      and when a controller calls SAVECONF. Fixes bug 3135; bugfix
      on 0.0.9pre6.
    - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
      Fixes bug 3208.
    - Always NUL-terminate the sun_path field of a sockaddr_un before
      passing it to the kernel. (Not a security issue: kernels are
      smart enough to reject bad sockaddr_uns.) Found by Coverity;
      CID #428. Bugfix on Tor 0.2.0.3-alpha.
    - Don't stack-allocate the list of supplementary GIDs when we're
      about to log them. Stack-allocating NGROUPS_MAX gid_t elements
      could take up to 256K, which is way too much stack. Found by
      Coverity; CID #450. Bugfix on 0.2.1.7-alpha.

  o Minor bugfixes (only in 0.2.1.x):
    - Resume using micro-version numbers in 0.2.1.x: our Debian packages
      rely on them. Bugfix on 0.2.1.30.
    - Use git revisions instead of svn revisions when generating our
      micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.

  o Minor features (also included in 0.2.2.x):
    - Adjust the expiration time on our SSL session certificates to
      better match SSL certs seen in the wild. Resolves ticket 4014.
    - Allow nameservers with IPv6 address. Resolves bug 2574.
    - Update to the October 4 2011 Maxmind GeoLite Country database.


Changes in version 0.2.3.5-alpha - 2011-09-28
  Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
  bridge relays; fixes an assertion error that many users started hitting
  today; and adds the ability to refill token buckets more often than
  once per second, allowing significant performance improvements.

  o Security fixes:
    - Bridge relays now do their directory fetches inside Tor TLS
      connections, like all the other clients do, rather than connecting
      directly to the DirPort like public relays do. Removes another
      avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
    - Bridges relays now build circuits for themselves in a more similar
      way to how clients build them. Removes another avenue for
      enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
      when bridges were introduced.

  o Major bugfixes:
    - Fix an "Assertion md->held_by_node == 1 failed" error that could
      occur when the same microdescriptor was referenced by two node_t
      objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.

  o Major features (networking):
    - Add a new TokenBucketRefillInterval option to refill token buckets
      more frequently than once per second. This should improve network
      performance, alleviate queueing problems, and make traffic less
      bursty. Implements proposal 183; closes ticket 3630. Design by
      Florian Tschorsch and Björn Scheuermann; implementation by
      Florian Tschorsch.

  o Minor bugfixes:
    - Change an integer overflow check in the OpenBSD_Malloc code so
      that GCC is less likely to eliminate it as impossible. Patch
      from Mansour Moufid. Fixes bug 4059.

  o Minor bugfixes (usability):
    - Downgrade log messages about circuit timeout calibration from
      "notice" to "info": they don't require or suggest any human
      intervention. Patch from Tom Lowenthal. Fixes bug 4063;
      bugfix on 0.2.2.14-alpha.

  o Minor features (diagnostics):
    - When the system call to create a listener socket fails, log the
      error message explaining why. This may help diagnose bug 4027.


Changes in version 0.2.3.4-alpha - 2011-09-13
  Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
  tweak to Tor's TLS handshake that makes relays and bridges that run
  this new version reachable from Iran again. It also fixes a few new
  bugs in 0.2.3.x, and teaches relays to recognize when they're not
  listed in the network consensus and republish.

  o Major bugfixes (also part of 0.2.2.33):
    - Avoid an assertion failure when reloading a configuration with
      TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
      3923; bugfix on 0.2.2.25-alpha.

  o Minor features (security, also part of 0.2.2.33):
    - Check for replays of the public-key encrypted portion of an
      INTRODUCE1 cell, in addition to the current check for replays of
      the g^x value. This prevents a possible class of active attacks
      by an attacker who controls both an introduction point and a
      rendezvous point, and who uses the malleability of AES-CTR to
      alter the encrypted g^x portion of the INTRODUCE1 cell. We think
      that these attacks are infeasible (requiring the attacker to send
      on the order of zettabytes of altered cells in a short interval),
      but we'd rather block them off in case there are any classes of
      this attack that we missed. Reported by Willem Pinckaers.

  o Minor features (also part of 0.2.2.33):
    - Adjust the expiration time on our SSL session certificates to
      better match SSL certs seen in the wild. Resolves ticket 4014.
    - Change the default required uptime for a relay to be accepted as
      a HSDir (hidden service directory) from 24 hours to 25 hours.
      Improves on 0.2.0.10-alpha; resolves ticket 2649.
    - Add a VoteOnHidServDirectoriesV2 config option to allow directory
      authorities to abstain from voting on assignment of the HSDir
      consensus flag. Related to bug 2649.
    - Update to the September 6 2011 Maxmind GeoLite Country database.

  o Minor bugfixes (also part of 0.2.2.33):
    - Demote the 'replay detected' log message emitted when a hidden
      service receives the same Diffie-Hellman public key in two different
      INTRODUCE2 cells to info level. A normal Tor client can cause that
      log message during its normal operation. Bugfix on 0.2.1.6-alpha;
      fixes part of bug 2442.
    - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
      level. There is nothing that a hidden service's operator can do
      to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
      of bug 2442.
    - Clarify a log message specifying the characters permitted in
      HiddenServiceAuthorizeClient client names. Previously, the log
      message said that "[A-Za-z0-9+-_]" were permitted; that could have
      given the impression that every ASCII character between "+" and "_"
      was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.

  o Build fixes (also part of 0.2.2.33):
    - Clean up some code issues that prevented Tor from building on older
      BSDs. Fixes bug 3894; reported by "grarpamp".
    - Search for a platform-specific version of "ar" when cross-compiling.
      Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.

  o Major bugfixes:
    - Fix a bug where the SocksPort option (for example) would get
      ignored and replaced by the default if a SocksListenAddress
      option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
      Fabian Keil.

  o Major features:
    - Relays now try regenerating and uploading their descriptor more
      frequently if they are not listed in the consensus, or if the
      version of their descriptor listed in the consensus is too
      old. This fix should prevent situations where a server declines
      to re-publish itself because it has done so too recently, even
      though the authorities decided not to list its recent-enough
      descriptor. Fix for bug 3327.

  o Minor features:
    - Relays now include a reason for regenerating their descriptors
      in an HTTP header when uploading to the authorities. This will
      make it easier to debug descriptor-upload issues in the future.
    - When starting as root and then changing our UID via the User
      control option, and we have a ControlSocket configured, make sure
      that the ControlSocket is owned by the same account that Tor will
      run under. Implements ticket 3421; fix by Jérémy Bobbio.

  o Minor bugfixes:
    - Abort if tor_vasprintf fails in connection_printf_to_buf (a
      utility function used in the control-port code). This shouldn't
      ever happen unless Tor is completely out of memory, but if it did
      happen and Tor somehow recovered from it, Tor could have sent a log
      message to a control port in the middle of a reply to a controller
      command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
    - Make 'FetchUselessDescriptors' cause all descriptor types and
      all consensus types (including microdescriptors) to get fetched.
      Fixes bug 3851; bugfix on 0.2.3.1-alpha.

  o Code refactoring:
    - Make a new "entry connection" struct as an internal subtype of "edge
      connection", to simplify the code and make exit connections smaller.


Changes in version 0.2.2.33 - 2011-09-13
  Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
  TLS handshake that makes relays and bridges that run this new version
  reachable from Iran again.

  o Major bugfixes:
    - Avoid an assertion failure when reloading a configuration with
      TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
      3923; bugfix on 0.2.2.25-alpha.

  o Minor features (security):
    - Check for replays of the public-key encrypted portion of an
      INTRODUCE1 cell, in addition to the current check for replays of
      the g^x value. This prevents a possible class of active attacks
      by an attacker who controls both an introduction point and a
      rendezvous point, and who uses the malleability of AES-CTR to
      alter the encrypted g^x portion of the INTRODUCE1 cell. We think
      that these attacks are infeasible (requiring the attacker to send
      on the order of zettabytes of altered cells in a short interval),
      but we'd rather block them off in case there are any classes of
      this attack that we missed. Reported by Willem Pinckaers.

  o Minor features:
    - Adjust the expiration time on our SSL session certificates to
      better match SSL certs seen in the wild. Resolves ticket 4014.
    - Change the default required uptime for a relay to be accepted as
      a HSDir (hidden service directory) from 24 hours to 25 hours.
      Improves on 0.2.0.10-alpha; resolves ticket 2649.
    - Add a VoteOnHidServDirectoriesV2 config option to allow directory
      authorities to abstain from voting on assignment of the HSDir
      consensus flag. Related to bug 2649.
    - Update to the September 6 2011 Maxmind GeoLite Country database.

  o Minor bugfixes (documentation and log messages):
    - Correct the man page to explain that HashedControlPassword and
      CookieAuthentication can both be set, in which case either method
      is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
      when we decided to allow these config options to both be set. Issue
      raised by bug 3898.
    - Demote the 'replay detected' log message emitted when a hidden
      service receives the same Diffie-Hellman public key in two different
      INTRODUCE2 cells to info level. A normal Tor client can cause that
      log message during its normal operation. Bugfix on 0.2.1.6-alpha;
      fixes part of bug 2442.
    - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
      level. There is nothing that a hidden service's operator can do
      to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
      of bug 2442.
    - Clarify a log message specifying the characters permitted in
      HiddenServiceAuthorizeClient client names. Previously, the log
      message said that "[A-Za-z0-9+-_]" were permitted; that could have
      given the impression that every ASCII character between "+" and "_"
      was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.

  o Build fixes:
    - Provide a substitute implementation of lround() for MSVC, which
      apparently lacks it. Patch from Gisle Vanem.
    - Clean up some code issues that prevented Tor from building on older
      BSDs. Fixes bug 3894; reported by "grarpamp".
    - Search for a platform-specific version of "ar" when cross-compiling.
      Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.


Changes in version 0.2.3.3-alpha - 2011-09-01
  Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
  security, and provides client-side support for the microdescriptor
  and optimistic data features introduced earlier in the 0.2.3.x
  series. It also includes numerous critical bugfixes in the (optional)
  bufferevent-based networking backend.

  o Major features (stream isolation):
    - You can now configure Tor so that streams from different
      applications are isolated on different circuits, to prevent an
      attacker who sees your streams as they leave an exit node from
      linking your sessions to one another. To do this, choose some way
      to distinguish the applications: have them connect to different
      SocksPorts, or have one of them use SOCKS4 while the other uses
      SOCKS5, or have them pass different authentication strings to the
      SOCKS proxy. Then, use the new SocksPort syntax to configure the
      degree of isolation you need. This implements Proposal 171.
    - There's a new syntax for specifying multiple client ports (such as
      SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
      multiple *Port entries with full addr:port syntax on each.
      The old *ListenAddress format is still supported, but you can't
      mix it with the new *Port syntax.

  o Major features (other):
    - Enable microdescriptor fetching by default for clients. This allows
      clients to download a much smaller amount of directory information.
      To disable it (and go back to the old-style consensus and
      descriptors), set "UseMicrodescriptors 0" in your torrc file.
    - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
      "PortForwarding" config option), now supports Windows.
    - When using an exit relay running 0.2.3.x, clients can now
      "optimistically" send data before the exit relay reports that
      the stream has opened. This saves a round trip when starting
      connections where the client speaks first (such as web browsing).
      This behavior is controlled by a consensus parameter (currently
      disabled). To turn it on or off manually, use the "OptimisticData"
      torrc option. Implements proposal 181; code by Ian Goldberg.

  o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
    - When using IOCP on Windows, we need to enable Libevent windows
      threading support.
    - The IOCP backend now works even when the user has not specified
      the (internal, debugging-only) _UseFilteringSSLBufferevents option.
      Fixes part of bug 3752.
    - Correctly record the bytes we've read and written when using
      bufferevents, so that we can include them in our bandwidth history
      and advertised bandwidth. Fixes bug 3803.
    - Apply rate-limiting only at the bottom of a chain of filtering
      bufferevents. This prevents us from filling up internal read
      buffers and violating rate-limits when filtering bufferevents
      are enabled. Fixes part of bug 3804.
    - Add high-watermarks to the output buffers for filtered
      bufferevents. This prevents us from filling up internal write
      buffers and wasting CPU cycles when filtering bufferevents are
      enabled. Fixes part of bug 3804.
    - Correctly notice when data has been written from a bufferevent
      without flushing it completely. Fixes bug 3805.
    - Fix a bug where server-side tunneled bufferevent-based directory
      streams would get closed prematurely. Fixes bug 3814.
    - Fix a use-after-free error with per-connection rate-limiting
      buckets. Fixes bug 3888.

  o Major bugfixes (also part of 0.2.2.31-rc):
    - If we're configured to write our ControlPorts to disk, only write
      them after switching UID and creating the data directory. This way,
      we don't fail when starting up with a nonexistent DataDirectory
      and a ControlPortWriteToFile setting based on that directory. Fixes
      bug 3747; bugfix on Tor 0.2.2.26-beta.

  o Minor features:
    - Added a new CONF_CHANGED event so that controllers can be notified
      of any configuration changes made by other controllers, or by the
      user. Implements ticket 1692.
    - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
      leak when using bufferevents, and lets Libevent worry about how to
      best copy data out of a buffer.
    - Replace files in stats/ rather than appending to them. Now that we
      include statistics in extra-info descriptors, it makes no sense to
      keep old statistics forever. Implements ticket 2930.

  o Minor features (build compatibility):
    - Limited, experimental support for building with nmake and MSVC.
    - Provide a substitute implementation of lround() for MSVC, which
      apparently lacks it. Patch from Gisle Vanem.

  o Minor features (also part of 0.2.2.31-rc):
    - Update to the August 2 2011 Maxmind GeoLite Country database.

  o Minor bugfixes (on 0.2.3.x-alpha):
    - Fix a spurious warning when parsing SOCKS requests with
      bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
    - Get rid of a harmless warning that could happen on relays running
      with bufferevents. The warning was caused by someone doing an http
      request to a relay's orport. Also don't warn for a few related
      non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.

  o Minor bugfixes (on 2.2.x and earlier):
    - Correct the man page to explain that HashedControlPassword and
      CookieAuthentication can both be set, in which case either method
      is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
      when we decided to allow these config options to both be set. Issue
      raised by bug 3898.
    - The "--quiet" and "--hush" options now apply not only to Tor's
      behavior before logs are configured, but also to Tor's behavior in
      the absense of configured logs. Fixes bug 3550; bugfix on
      0.2.0.10-alpha.

  o Minor bugfixes (also part of 0.2.2.31-rc):
    - Write several files in text mode, on OSes that distinguish text
      mode from binary mode (namely, Windows). These files are:
      'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
      that collect those statistics; 'client_keys' and 'hostname' for
      hidden services that use authentication; and (in the tor-gencert
      utility) newly generated identity and signing keys. Previously,
      we wouldn't specify text mode or binary mode, leading to an
      assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
      the DirRecordUsageByCountry option which would have triggered
      the assertion failure was added), although this assertion failure
      would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
    - Selectively disable deprecation warnings on OS X because Lion
      started deprecating the shipped copy of openssl. Fixes bug 3643.
    - Remove an extra pair of quotation marks around the error
      message in control-port STATUS_GENERAL BUG events. Bugfix on
      0.1.2.6-alpha; fixes bug 3732.
    - When unable to format an address as a string, report its value
      as "???" rather than reusing the last formatted address. Bugfix
      on 0.2.1.5-alpha.

  o Code simplifications and refactoring:
    - Rewrite the listener-selection logic so that parsing which ports
      we want to listen on is now separate from binding to the ports
      we want.

  o Build changes:
    - Building Tor with bufferevent support now requires Libevent
      2.0.13-stable or later. Previous versions of Libevent had bugs in
      SSL-related bufferevents and related issues that would make Tor
      work badly with bufferevents. Requiring 2.0.13-stable also allows
      Tor with bufferevents to take advantage of Libevent APIs
      introduced after 2.0.8-rc.


Changes in version 0.2.2.32 - 2011-08-27
  The Tor 0.2.2 release series is dedicated to the memory of Andreas
  Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
  a founder of the PETS community, a leader in our field, a mentor,
  and a friend. He left us with these words: "I had the possibility
  to contribute to this world that is not as it should be. I hope I
  could help in some areas to make the world a better place, and that
  I could also encourage other people to be engaged in improving the
  world. Please, stay engaged. This world needs you, your love, your
  initiative -- now I cannot be part of that anymore."

  Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
  ready. More than two years in the making, this release features improved
  client performance and hidden service reliability, better compatibility
  for Android, correct behavior for bridges that listen on more than
  one address, more extensible and flexible directory object handling,
  better reporting of network statistics, improved code security, and
  many many other features and bugfixes.


Changes in version 0.2.2.31-rc - 2011-08-17
  Tor 0.2.2.31-rc is the second and hopefully final release candidate
  for the Tor 0.2.2.x series.

  o Major bugfixes:
    - Remove an extra pair of quotation marks around the error
      message in control-port STATUS_GENERAL BUG events. Bugfix on
      0.1.2.6-alpha; fixes bug 3732.
    - If we're configured to write our ControlPorts to disk, only write
      them after switching UID and creating the data directory. This way,
      we don't fail when starting up with a nonexistent DataDirectory
      and a ControlPortWriteToFile setting based on that directory. Fixes
      bug 3747; bugfix on Tor 0.2.2.26-beta.

  o Minor features:
    - Update to the August 2 2011 Maxmind GeoLite Country database.

  o Minor bugfixes:
    - Allow GETINFO fingerprint to return a fingerprint even when
      we have not yet built a router descriptor. Fixes bug 3577;
      bugfix on 0.2.0.1-alpha.
    - Write several files in text mode, on OSes that distinguish text
      mode from binary mode (namely, Windows). These files are:
      'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
      that collect those statistics; 'client_keys' and 'hostname' for
      hidden services that use authentication; and (in the tor-gencert
      utility) newly generated identity and signing keys. Previously,
      we wouldn't specify text mode or binary mode, leading to an
      assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
      the DirRecordUsageByCountry option which would have triggered
      the assertion failure was added), although this assertion failure
      would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
    - Selectively disable deprecation warnings on OS X because Lion
      started deprecating the shipped copy of openssl. Fixes bug 3643.
    - When unable to format an address as a string, report its value
      as "???" rather than reusing the last formatted address. Bugfix
      on 0.2.1.5-alpha.


Changes in version 0.2.3.2-alpha - 2011-07-18
  Tor 0.2.3.2-alpha introduces two new experimental features:
  microdescriptors and pluggable transports. It also continues cleaning
  up a variety of recently introduced features.

  o Major features:
    - Clients can now use microdescriptors instead of regular descriptors
      to build circuits. Microdescriptors are authority-generated
      summaries of regular descriptors' contents, designed to change
      very rarely (see proposal 158 for details). This feature is
      designed to save bandwidth, especially for clients on slow internet
      connections. It's off by default for now, since nearly no caches
      support it, but it will be on-by-default for clients in a future
      version. You can use the UseMicrodescriptors option to turn it on.
    - Tor clients using bridges can now be configured to use a separate
      'transport' proxy for each bridge. This approach helps to resist
      censorship by allowing bridges to use protocol obfuscation
      plugins. It implements part of proposal 180. Implements ticket 2841.
    - While we're trying to bootstrap, record how many TLS connections
      fail in each state, and report which states saw the most failures
      in response to any bootstrap failures. This feature may speed up
      diagnosis of censorship events. Implements ticket 3116.

  o Major bugfixes (on 0.2.3.1-alpha):
    - When configuring a large set of nodes in EntryNodes (as with
      'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
      random subset to be guards, and choose them in random
      order. Fixes bug 2798.
    - Tor could crash when remembering a consensus in a non-used consensus
      flavor without having a current consensus set. Fixes bug 3361.
    - Comparing an unknown address to a microdescriptor's shortened exit
      policy would always give a "rejected" result. Fixes bug 3599.
    - Using microdescriptors as a client no longer prevents Tor from
      uploading and downloading hidden service descriptors. Fixes
      bug 3601.

  o Minor features:
    - Allow nameservers with IPv6 address. Resolves bug 2574.
    - Accept attempts to include a password authenticator in the
      handshake, as supported by SOCKS5. This handles SOCKS clients that
      don't know how to omit a password when authenticating. Resolves
      bug 1666.
    - When configuring a large set of nodes in EntryNodes, and there are
      enough of them listed as Guard so that we don't need to consider
      the non-guard entries, prefer the ones listed with the Guard flag.
    - Check for and recover from inconsistency in the microdescriptor
      cache. This will make it harder for us to accidentally free a
      microdescriptor without removing it from the appropriate data
      structures. Fixes issue 3135; issue noted by "wanoskarnet".
    - Log SSL state transitions at log level DEBUG, log domain
      HANDSHAKE. This can be useful for debugging censorship events.
      Implements ticket 3264.
    - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
      implements ticket 3439.

  o Minor bugfixes (on 0.2.3.1-alpha):
    - Do not free all general-purpose regular descriptors just
      because microdescriptor use is enabled. Fixes bug 3113.
    - Correctly link libevent_openssl when --enable-static-libevent
      is passed to configure. Fixes bug 3118.
    - Bridges should not complain during their heartbeat log messages that
      they are unlisted in the consensus: that's more or less the point
      of being a bridge. Fixes bug 3183.
    - Report a SIGNAL event to controllers when acting on a delayed
      SIGNAL NEWNYM command. Previously, we would report a SIGNAL
      event to the controller if we acted on a SIGNAL NEWNYM command
      immediately, and otherwise not report a SIGNAL event for the
      command at all. Fixes bug 3349.
    - Fix a crash when handling the SIGNAL controller command or
      reporting ERR-level status events with bufferevents enabled. Found
      by Robert Ransom. Fixes bug 3367.
    - Always ship the tor-fw-helper manpage in our release tarballs.
      Fixes bug 3389. Reported by Stephen Walker.
    - Fix a class of double-mark-for-close bugs when bufferevents
      are enabled. Fixes bug 3403.
    - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
    - Add SIGNAL to the list returned by the 'GETINFO events/names'
      control-port command. Fixes part of bug 3465.
    - Prevent using negative indices during unit test runs when read_all()
      fails. Spotted by coverity.
    - Fix a rare memory leak when checking the nodelist without it being
      present. Found by coverity.
    - Only try to download a microdescriptor-flavored consensus from
      a directory cache that provides them.

  o Minor bugfixes (on 0.2.2.x and earlier):
    - Assert that hidden-service-related operations are not performed
      using single-hop circuits. Previously, Tor would assert that
      client-side streams are not attached to single-hop circuits,
      but not that other sensitive operations on the client and service
      side are not performed using single-hop circuits. Fixes bug 3332;
      bugfix on 0.0.6.
    - Don't publish a new relay descriptor when we reload our onion key,
      unless the onion key has actually changed. Fixes bug 3263 and
      resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
    - Allow GETINFO fingerprint to return a fingerprint even when
      we have not yet built a router descriptor. Fixes bug 3577;
      bugfix on 0.2.0.1-alpha.
    - Make 'tor --digests' list hashes of all Tor source files. Bugfix
      on 0.2.2.4-alpha; fixes bug 3427.

  o Code simplification and refactoring:
    - Use tor_sscanf() in place of scanf() in more places through the
      code. This makes us a little more locale-independent, and
      should help shut up code-analysis tools that can't tell
      a safe sscanf string from a dangerous one.
    - Use tt_assert(), not tor_assert(), for checking for test failures.
      This makes the unit tests more able to go on in the event that
      one of them fails.
    - Split connection_about_to_close() into separate functions for each
      connection type.

  o Build changes:
    - On Windows, we now define the _WIN32_WINNT macros only if they
      are not already defined. This lets the person building Tor decide,
      if they want, to require a later version of Windows.


Changes in version 0.2.2.30-rc - 2011-07-07
  Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
  series. It fixes a few smaller bugs, but generally appears stable.
  Please test it and let us know whether it is!

  o Minor bugfixes:
    - Send a SUCCEEDED stream event to the controller when a reverse
      resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
      discovered by katmagic.
    - Always NUL-terminate the sun_path field of a sockaddr_un before
      passing it to the kernel. (Not a security issue: kernels are
      smart enough to reject bad sockaddr_uns.) Found by Coverity;
      CID #428. Bugfix on Tor 0.2.0.3-alpha.
    - Don't stack-allocate the list of supplementary GIDs when we're
      about to log them. Stack-allocating NGROUPS_MAX gid_t elements
      could take up to 256K, which is way too much stack. Found by
      Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
    - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
      events/names' control-port command. Bugfix on 0.2.2.9-alpha;
      fixes part of bug 3465.
    - Fix a memory leak when receiving a descriptor for a hidden
      service we didn't ask for. Found by Coverity; CID #30. Bugfix
      on 0.2.2.26-beta.

  o Minor features:
    - Update to the July 1 2011 Maxmind GeoLite Country database.


Changes in version 0.2.2.29-beta - 2011-06-20
  Tor 0.2.2.29-beta reverts an accidental behavior change for users who
  have bridge lines in their torrc but don't want to use them; gets
  us closer to having the control socket feature working on Debian;
  and fixes a variety of smaller bugs.

  o Major bugfixes:
    - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
      When we changed the default behavior to "use bridges if any
      are listed in the torrc", we surprised users who had bridges
      in their torrc files but who didn't actually want to use them.
      Partial resolution for bug 3354.

  o Privacy fixes:
    - Don't attach new streams to old rendezvous circuits after SIGNAL
      NEWNYM. Previously, we would keep using an existing rendezvous
      circuit if it remained open (i.e. if it were kept open by a
      long-lived stream, or if a new stream were attached to it before
      Tor could notice that it was old and no longer in use). Bugfix on
      0.1.1.15-rc; fixes bug 3375.

  o Minor bugfixes:
    - Fix a bug when using ControlSocketsGroupWritable with User. The
      directory's group would be checked against the current group, not
      the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
      bugfix on 0.2.2.26-beta.
    - Make connection_printf_to_buf()'s behaviour sane. Its callers
      expect it to emit a CRLF iff the format string ends with CRLF;
      it actually emitted a CRLF iff (a) the format string ended with
      CRLF or (b) the resulting string was over 1023 characters long or
      (c) the format string did not end with CRLF *and* the resulting
      string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
      fixes part of bug 3407.
    - Make send_control_event_impl()'s behaviour sane. Its callers
      expect it to always emit a CRLF at the end of the string; it
      might have emitted extra control characters as well. Bugfix on
      0.1.1.9-alpha; fixes another part of bug 3407.
    - Make crypto_rand_int() check the value of its input correctly.
      Previously, it accepted values up to UINT_MAX, but could return a
      negative number if given a value above INT_MAX+1. Found by George
      Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
    - Avoid a segfault when reading a malformed circuit build state
      with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
      0.2.2.4-alpha.
    - When asked about a DNS record type we don't support via a
      client DNSPort, reply with NOTIMPL rather than an empty
      reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
    - Fix a rare memory leak during stats writing. Found by coverity.

  o Minor features:
    - Update to the June 1 2011 Maxmind GeoLite Country database.

  o Code simplifications and refactoring:
    - Remove some dead code as indicated by coverity.
    - Remove a few dead assignments during router parsing. Found by
      coverity.
    - Add some forgotten return value checks during unit tests. Found
      by coverity.
    - Don't use 1-bit wide signed bit fields. Found by coverity.


Changes in version 0.2.2.28-beta - 2011-06-04
  Tor 0.2.2.28-beta makes great progress towards a new stable release: we
  fixed a big bug in whether relays stay in the consensus consistently,
  we moved closer to handling bridges and hidden services correctly,
  and we started the process of better handling the dreaded "my Vidalia
  died, and now my Tor demands a password when I try to reconnect to it"
  usability issue.

  o Major bugfixes:
    - Don't decide to make a new descriptor when receiving a HUP signal.
      This bug has caused a lot of 0.2.2.x relays to disappear from the
      consensus periodically. Fixes the most common case of triggering
      bug 1810; bugfix on 0.2.2.7-alpha.
    - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
    - Don't try to build descriptors if "ORPort auto" is set and we
      don't know our actual ORPort yet. Fix for bug 3216; bugfix on
      0.2.2.26-beta.
    - Resolve a crash that occurred when setting BridgeRelay to 1 with
      accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
    - Apply circuit timeouts to opened hidden-service-related circuits
      based on the correct start time. Previously, we would apply the
      circuit build timeout based on time since the circuit's creation;
      it was supposed to be applied based on time since the circuit
      entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
    - Use the same circuit timeout for client-side introduction
      circuits as for other four-hop circuits, rather than the timeout
      for single-hop directory-fetch circuits; the shorter timeout may
      have been appropriate with the static circuit build timeout in
      0.2.1.x and earlier, but caused many hidden service access attempts
      to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
      on 0.2.2.2-alpha; fixes another part of bug 1297.
    - In ticket 2511 we fixed a case where you could use an unconfigured
      bridge if you had configured it as a bridge the last time you ran
      Tor. Now fix another edge case: if you had configured it as a bridge
      but then switched to a different bridge via the controller, you
      would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
      fixes bug 3321.

  o Major features:
    - Add an __OwningControllerProcess configuration option and a
      TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
      that when it exits, Tor will shut down. Implements feature 3049.
    - If "UseBridges 1" is set and no bridges are configured, Tor will
      now refuse to build any circuits until some bridges are set.
      If "UseBridges auto" is set, Tor will use bridges if they are
      configured and we are not running as a server, but otherwise will
      make circuits as usual. The new default is "auto". Patch by anonym,
      so the Tails LiveCD can stop automatically revealing you as a Tor
      user on startup.

  o Minor bugfixes:
    - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
    - Remove a trailing asterisk from "exit-policy/default" in the
      output of the control port command "GETINFO info/names". Bugfix
      on 0.1.2.5-alpha.
    - Use a wide type to hold sockets when built for 64-bit Windows builds.
      Fixes bug 3270.
    - Warn when the user configures two HiddenServiceDir lines that point
      to the same directory. Bugfix on 0.0.6 (the version introducing
      HiddenServiceDir); fixes bug 3289.
    - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
      part of bug 2748; bugfix on 0.2.0.10-alpha.
    - Log malformed requests for rendezvous descriptors as protocol
      warnings, not warnings. Also, use a more informative log message
      in case someone sees it at log level warning without prior
      info-level messages. Fixes the other part of bug 2748; bugfix
      on 0.2.0.10-alpha.
    - Clear the table recording the time of the last request for each
      hidden service descriptor from each HS directory on SIGNAL NEWNYM.
      Previously, we would clear our HS descriptor cache on SIGNAL
      NEWNYM, but if we had previously retrieved a descriptor (or tried
      to) from every directory responsible for it, we would refuse to
      fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
      fixes bug 3309.
    - Fix a log message that said "bits" while displaying a value in
      bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
      0.2.0.1-alpha.
    - When checking for 1024-bit keys, check for 1024 bits, not 128
      bytes. This allows Tor to correctly discard keys of length 1017
      through 1023. Bugfix on 0.0.9pre5.

  o Minor features:
    - Relays now log the reason for publishing a new relay descriptor,
      so we have a better chance of hunting down instances of bug 1810.
      Resolves ticket 3252.
    - Revise most log messages that refer to nodes by nickname to
      instead use the "$key=nickname at address" format. This should be
      more useful, especially since nicknames are less and less likely
      to be unique. Resolves ticket 3045.
    - Log (at info level) when purging pieces of hidden-service-client
      state because of SIGNAL NEWNYM.

  o Removed options:
    - Remove undocumented option "-F" from tor-resolve: it hasn't done
      anything since 0.2.1.16-rc.


Changes in version 0.2.2.27-beta - 2011-05-18
  Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
  release, and also adds a few more general bugfixes.

  o Major bugfixes:
    - Fix a crash bug when changing bridges in a running Tor process.
      Fixes bug 3213; bugfix on 0.2.2.26-beta.
    - When the controller configures a new bridge, don't wait 10 to 60
      seconds before trying to fetch its descriptor. Bugfix on
      0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).

  o Minor bugfixes:
    - Require that onion keys have exponent 65537 in microdescriptors too.
      Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
    - Tor used to limit HttpProxyAuthenticator values to 48 characters.
      Changed the limit to 512 characters by removing base64 newlines.
      Fixes bug 2752. Fix by Michael Yakubovich.
    - When a client starts or stops using bridges, never use a circuit
      that was built before the configuration change. This behavior could
      put at risk a user who uses bridges to ensure that her traffic
      only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
      bug 3200.


Changes in version 0.2.2.26-beta - 2011-05-17
  Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
  also introduces a new "socksport auto" approach that should make it
  easier to run multiple Tors on the same system, and does a lot of
  cleanup to get us closer to a release candidate.

  o Security/privacy fixes:
    - Replace all potentially sensitive memory comparison operations
      with versions whose runtime does not depend on the data being
      compared. This will help resist a class of attacks where an
      adversary can use variations in timing information to learn
      sensitive data. Fix for one case of bug 3122. (Safe memcmp
      implementation by Robert Ransom based partially on code by DJB.)
    - When receiving a hidden service descriptor, check that it is for
      the hidden service we wanted. Previously, Tor would store any
      hidden service descriptors that a directory gave it, whether it
      wanted them or not. This wouldn't have let an attacker impersonate
      a hidden service, but it did let directories pre-seed a client
      with descriptors that it didn't want. Bugfix on 0.0.6.
    - On SIGHUP, do not clear out all TrackHostExits mappings, client
      DNS cache entries, and virtual address mappings: that's what
      NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.

  o Major features:
    - The options SocksPort, ControlPort, and so on now all accept a
      value "auto" that opens a socket on an OS-selected port. A
      new ControlPortWriteToFile option tells Tor to write its
      actual control port or ports to a chosen file. If the option
      ControlPortFileGroupReadable is set, the file is created as
      group-readable. Now users can run two Tor clients on the same
      system without needing to manually mess with parameters. Resolves
      part of ticket 3076.
    - Set SO_REUSEADDR on all sockets, not just listeners. This should
      help busy exit nodes avoid running out of useable ports just
      because all the ports have been used in the near past. Resolves
      issue 2850.

  o Minor features:
    - New "GETINFO net/listeners/(type)" controller command to return
      a list of addresses and ports that are bound for listeners for a
      given connection type. This is useful when the user has configured
      "SocksPort auto" and the controller needs to know which port got
      chosen. Resolves another part of ticket 3076.
    - Add a new ControlSocketsGroupWritable configuration option: when
      it is turned on, ControlSockets are group-writeable by the default
      group of the current user. Patch by Jérémy Bobbio; implements
      ticket 2972.
    - Tor now refuses to create a ControlSocket in a directory that is
      world-readable (or group-readable if ControlSocketsGroupWritable
      is 0). This is necessary because some operating systems do not
      enforce permissions on an AF_UNIX sockets. Permissions on the
      directory holding the socket, however, seems to work everywhere.
    - Rate-limit a warning about failures to download v2 networkstatus
      documents. Resolves part of bug 1352.
    - Backport code from 0.2.3.x that allows directory authorities to
      clean their microdescriptor caches. Needed to resolve bug 2230.
    - When an HTTPS proxy reports "403 Forbidden", we now explain
      what it means rather than calling it an unexpected status code.
      Closes bug 2503. Patch from Michael Yakubovich.
    - Update to the May 1 2011 Maxmind GeoLite Country database.

  o Minor bugfixes:
    - Authorities now clean their microdesc cache periodically and when
      reading from disk initially, not only when adding new descriptors.
      This prevents a bug where we could lose microdescriptors. Bugfix
      on 0.2.2.6-alpha. Fixes bug 2230.
    - Do not crash when our configuration file becomes unreadable, for
      example due to a permissions change, between when we start up
      and when a controller calls SAVECONF. Fixes bug 3135; bugfix
      on 0.0.9pre6.
    - Avoid a bug that would keep us from replacing a microdescriptor
      cache on Windows. (We would try to replace the file while still
      holding it open. That's fine on Unix, but Windows doesn't let us
      do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
    - Add missing explanations for the authority-related torrc options
      RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
      man page. Resolves issue 2379.
    - As an authority, do not upload our own vote or signature set to
      ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
      it would get flagged as a duplicate. Resolves bug 3026.
    - Accept hidden service descriptors if we think we might be a hidden
      service directory, regardless of what our consensus says. This
      helps robustness, since clients and hidden services can sometimes
      have a more up-to-date view of the network consensus than we do,
      and if they think that the directory authorities list us a HSDir,
      we might actually be one. Related to bug 2732; bugfix on
      0.2.0.10-alpha.
    - When a controller changes TrackHostExits, remove mappings for
      hosts that should no longer have their exits tracked. Bugfix on
      0.1.0.1-rc.
    - When a controller changes VirtualAddrNetwork, remove any mappings
      for hosts that were automapped to the old network. Bugfix on
      0.1.1.19-rc.
    - When a controller changes one of the AutomapHosts* options, remove
      any mappings for hosts that should no longer be automapped. Bugfix
      on 0.2.0.1-alpha.
    - Do not reset the bridge descriptor download status every time we
      re-parse our configuration or get a configuration change. Fixes
      bug 3019; bugfix on 0.2.0.3-alpha.

  o Minor bugfixes (code cleanup):
    - When loading the microdesc journal, remember its current size.
      In 0.2.2, this helps prevent the microdesc journal from growing
      without limit on authorities (who are the only ones to use it in
      0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
      Fix posted by "cypherpunks."
    - The microdesc journal is supposed to get rebuilt only if it is
      at least _half_ the length of the store, not _twice_ the length
      of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
    - Fix a potential null-pointer dereference while computing a
      consensus. Bugfix on tor-0.2.0.3-alpha, found with the help of
      clang's analyzer.
    - Avoid a possible null-pointer dereference when rebuilding the mdesc
      cache without actually having any descriptors to cache. Bugfix on
      0.2.2.6-alpha. Issue discovered using clang's static analyzer.
    - If we fail to compute the identity digest of a v3 legacy keypair,
      warn, and don't use a buffer-full of junk instead. Bugfix on
      0.2.1.1-alpha; fixes bug 3106.
    - Resolve an untriggerable issue in smartlist_string_num_isin(),
      where if the function had ever in the future been used to check
      for the presence of a too-large number, it would have given an
      incorrect result. (Fortunately, we only used it for 16-bit
      values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
    - Require that introduction point keys and onion handshake keys
      have a public exponent of 65537. Starts to fix bug 3207; bugfix
      on 0.2.0.10-alpha.

  o Removed features:
    - Caches no longer download and serve v2 networkstatus documents
      unless FetchV2Networkstatus flag is set: these documents haven't
      haven't been used by clients or relays since 0.2.0.x. Resolves
      bug 3022.


Changes in version 0.2.3.1-alpha - 2011-05-05
  Tor 0.2.3.1-alpha adds some new experimental features, including support
  for an improved network IO backend, IOCP networking on Windows,
  microdescriptor caching, "fast-start" support for streams, and automatic
  home router configuration. There are also numerous internal improvements
  to try to make the code easier for developers to work with.

  This is the first alpha release in a new series, so expect there to be
  bugs. Users who would rather test out a more stable branch should
  stay with 0.2.2.x for now.

  o Major features:
    - Tor can now optionally build with the "bufferevents" buffered IO
      backend provided by Libevent 2. To use this feature, make sure you
      have the latest possible version of Libevent, and pass the
      --enable-bufferevents flag to configure when building Tor from
      source. This feature will make our networking code more flexible,
      let us stack layers on each other, and let us use more efficient
      zero-copy transports where available.
    - As an experimental feature, Tor can use IOCP for networking on Windows.
      Once this code is tuned and optimized, it promises much better
      performance than the select-based backend we've used in the past. To
      try this feature, you must build Tor with Libevent 2, configure Tor
      with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
      your torrc. There are known bugs here: only try this if you can help
      debug it as it breaks.
    - The EntryNodes option can now include country codes like {de} or IP
      addresses or network masks. Previously we had disallowed these options
      because we didn't have an efficient way to keep the list up to
      date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
    - Exit nodes now accept and queue data on not-yet-connected streams.
      Previously, the client wasn't allowed to send data until the stream was
      connected, which slowed down all connections. This change will enable
      clients to perform a "fast-start" on streams and send data without
      having to wait for a confirmation that the stream has opened. (Patch
      from Ian Goldberg; implements the server side of Proposal 174.)
    - Tor now has initial support for automatic port mapping on the many
      home routers that support NAT-PMP or UPnP. (Not yet supported on
      Windows). To build the support code, you'll need to have libnatpnp
      library and/or the libminiupnpc library, and you'll need to enable the
      feature specifically by passing "--enable-upnp" and/or
      "--enable-natpnp" to configure. To turn it on, use the new
      PortForwarding option.
    - Caches now download, cache, and serve multiple "flavors" of the
      consensus, including a flavor that describes microdescriptors.
    - Caches now download, cache, and serve microdescriptors -- small
      summaries of router descriptors that are authenticated by all of the
      directory authorities. Once enough caches are running this code,
      clients will be able to save significant amounts of directory bandwidth
      by downloading microdescriptors instead of router descriptors.

  o Minor features:
    - Make logging resolution configurable with a new LogTimeGranularity
      option, and change the default from 1 millisecond to 1 second.
      Implements enhancement 1668.
    - We log which torrc file we're using on startup. Implements ticket
      2444.
    - Ordinarily, Tor does not count traffic from private addresses (like
      127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
      There is now a new option, CountPrivateBandwidth, to disable this
      behavior. Patch from Daniel Cagara.
    - New --enable-static-tor configure option for building Tor as
      statically as possible. Idea, general hackery and thoughts from
      Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
      2702.
    - If you set the NumCPUs option to 0, Tor will now try to detect how
      many CPUs you have. This is the new default behavior.
    - Turn on directory request statistics by default and include them in
      extra-info descriptors. Don't break if we have no GeoIP database.
    - Relays that set "ConnDirectionStatistics 1" write statistics on the
      bidirectional use of connections to disk every 24 hours.
    - Add a GeoIP file digest to the extra-info descriptor. Implements
      enhancement 1883.
    - The NodeFamily option -- which let you declare that you want to
      consider nodes to be part of a family whether they list themselves
      that way or not -- now allows IP address ranges and country codes.
    - Add a new 'Heartbeat' log message type to periodically log a message
      describing Tor's status at level Notice. This feature is meant for
      operators who log at notice, and want to make sure that their Tor
      server is still working. Implementation by George Kadianakis.

  o Minor bugfixes (on 0.2.2.25-alpha):
    - When loading the microdesc journal, remember its current size.
      In 0.2.2, this helps prevent the microdesc journal from growing
      without limit on authorities (who are the only ones to use it in
      0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
      Fix posted by "cypherpunks."
    - The microdesc journal is supposed to get rebuilt only if it is
      at least _half_ the length of the store, not _twice_ the length
      of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
    - If as an authority we fail to compute the identity digest of a v3
      legacy keypair, warn, and don't use a buffer-full of junk instead.
      Bugfix on 0.2.1.1-alpha; fixes bug 3106.
    - Authorities now clean their microdesc cache periodically and when
      reading from disk initially, not only when adding new descriptors.
      This prevents a bug where we could lose microdescriptors. Bugfix
      on 0.2.2.6-alpha.

  o Minor features (controller):
    - Add a new SIGNAL event to the controller interface so that
      controllers can be notified when Tor handles a signal. Resolves
      issue 1955. Patch by John Brooks.
    - Add a new GETINFO option to get total bytes read and written. Patch
      from pipe, revised by atagar. Resolves ticket 2345.
    - Implement some GETINFO controller fields to provide information about
      the Tor process's pid, euid, username, and resource limits.

  o Build changes:
    - Our build system requires automake 1.6 or later to create the
      Makefile.in files. Previously, you could have used 1.4.
      This only affects developers and people building Tor from git;
      people who build Tor from the source distribution without changing
      the Makefile.am files should be fine.
    - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
      so on. This is more robust against some of the failure modes
      associated with running the autotools pieces on their own.

  o Minor packaging issues:
    - On OpenSUSE, create the /var/run/tor directory on startup if it is not
      already created. Patch from Andreas Stieger. Fixes bug 2573.

  o Code simplifications and refactoring:
    - A major revision to our internal node-selecting and listing logic.
      Tor already had at least two major ways to look at the question of
      "which Tor servers do we know about": a list of router descriptors,
      and a list of entries in the current consensus. With
      microdescriptors, we're adding a third. Having so many systems
      without an abstraction layer over them was hurting the codebase.
      Now, we have a new "node_t" abstraction that presents a consistent
      interface to a client's view of a Tor node, and holds (nearly) all
      of the mutable state formerly in routerinfo_t and routerstatus_t.
    - The helper programs tor-gencert, tor-resolve, and tor-checkkey
      no longer link against Libevent: they never used it, but
      our library structure used to force them to link it.

  o Removed features:
    - Remove some old code to work around even older versions of Tor that
      used forked processes to handle DNS requests. Such versions of Tor
      are no longer in use as servers.

  o Documentation fixes:
    - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
    - Add missing documentation for the authority-related torrc options
      RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
      issue 2379.


Changes in version 0.2.2.25-alpha - 2011-04-29
  Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
  robust, routers no longer overreport their bandwidth, Win7 should crash
  a little less, and NEWNYM (as used by Vidalia's "new identity" button)
  now prevents hidden service-related activity from being linkable. It
  provides more information to Vidalia so you can see if your bridge is
  working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
  StrictNodes configuration options to make them more reliable, more
  understandable, and more regularly applied. If you use those options,
  please see the revised documentation for them in the manual page.

  o Major bugfixes:
    - Relays were publishing grossly inflated bandwidth values because
      they were writing their state files wrong--now they write the
      correct value. Also, resume reading bandwidth history from the
      state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
    - Improve hidden service robustness: When we find that we have
      extended a hidden service's introduction circuit to a relay not
      listed as an introduction point in the HS descriptor we currently
      have, retry with an introduction point from the current
      descriptor. Previously we would just give up. Fixes bugs 1024 and
      1930; bugfix on 0.2.0.10-alpha.
    - Clients now stop trying to use an exit node associated with a given
      destination by TrackHostExits if they fail to reach that exit node.
      Fixes bug 2999. Bugfix on 0.2.0.20-rc.
    - Fix crash bug on platforms where gmtime and localtime can return
      NULL. Windows 7 users were running into this one. Fixes part of bug
      2077. Bugfix on all versions of Tor. Found by boboper.

  o Security and stability fixes:
    - Don't double-free a parsable, but invalid, microdescriptor, even if
      it is followed in the blob we're parsing by an unparsable
      microdescriptor. Fixes an issue reported in a comment on bug 2954.
      Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
    - If the Nickname configuration option isn't given, Tor would pick a
      nickname based on the local hostname as the nickname for a relay.
      Because nicknames are not very important in today's Tor and the
      "Unnamed" nickname has been implemented, this is now problematic
      behavior: It leaks information about the hostname without being
      useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
      introduced the Unnamed nickname. Reported by tagnaq.
    - Fix an uncommon assertion failure when running with DNSPort under
      heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
    - Avoid linkability based on cached hidden service descriptors: forget
      all hidden service descriptors cached as a client when processing a
      SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.

  o Major features:
    - Export GeoIP information on bridge usage to controllers even if we
      have not yet been running for 24 hours. Now Vidalia bridge operators
      can get more accurate and immediate feedback about their
      contributions to the network.

  o Major features and bugfixes (node selection):
    - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
      ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
      options. Previously, we had been ambiguous in describing what
      counted as an "exit" node, and what operations exactly "StrictNodes
      0" would permit. This created confusion when people saw nodes built
      through unexpected circuits, and made it hard to tell real bugs from
      surprises. Now the intended behavior is:
        . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
          a node that delivers user traffic outside the Tor network.
        . "Entry", in the context of EntryNodes, means a node used as the
          first hop of a multihop circuit. It doesn't include direct
          connections to directory servers.
        . "ExcludeNodes" applies to all nodes.
        . "StrictNodes" changes the behavior of ExcludeNodes only. When
          StrictNodes is set, Tor should avoid all nodes listed in
          ExcludeNodes, even when it will make user requests fail. When
          StrictNodes is *not* set, then Tor should follow ExcludeNodes
          whenever it can, except when it must use an excluded node to
          perform self-tests, connect to a hidden service, provide a
          hidden service, fulfill a .exit request, upload directory
          information, or fetch directory information.
      Collectively, the changes to implement the behavior fix bug 1090.
    - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
      a node is listed in both, it's treated as excluded.
    - ExcludeNodes now applies to directory nodes -- as a preference if
      StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
      Don't exclude all the directory authorities and set StrictNodes to 1
      unless you really want your Tor to break.
    - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
    - ExcludeExitNodes now overrides .exit requests.
    - We don't use bridges listed in ExcludeNodes.
    - When StrictNodes is 1:
       . We now apply ExcludeNodes to hidden service introduction points
         and to rendezvous points selected by hidden service users. This
         can make your hidden service less reliable: use it with caution!
       . If we have used ExcludeNodes on ourself, do not try relay
         reachability self-tests.
       . If we have excluded all the directory authorities, we will not
         even try to upload our descriptor if we're a relay.
       . Do not honor .exit requests to an excluded node.
    - Remove a misfeature that caused us to ignore the Fast/Stable flags
      when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
    - When the set of permitted nodes changes, we now remove any mappings
      introduced via TrackExitHosts to now-excluded nodes. Bugfix on
      0.1.0.1-rc.
    - We never cannibalize a circuit that had excluded nodes on it, even
      if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
    - Revert a change where we would be laxer about attaching streams to
      circuits than when building the circuits. This was meant to prevent
      a set of bugs where streams were never attachable, but our improved
      code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
    - Keep track of how many times we launch a new circuit to handle a
      given stream. Too many launches could indicate an inconsistency
      between our "launch a circuit to handle this stream" logic and our
      "attach this stream to one of the available circuits" logic.
    - Improve log messages related to excluded nodes.

  o Minor bugfixes:
    - Fix a spurious warning when moving from a short month to a long
      month on relays with month-based BandwidthAccounting. Bugfix on
      0.2.2.17-alpha; fixes bug 3020.
    - When a client finds that an origin circuit has run out of 16-bit
      stream IDs, we now mark it as unusable for new streams. Previously,
      we would try to close the entire circuit. Bugfix on 0.0.6.
    - Add a forgotten cast that caused a compile warning on OS X 10.6.
      Bugfix on 0.2.2.24-alpha.
    - Be more careful about reporting the correct error from a failed
      connect() system call. Under some circumstances, it was possible to
      look at an incorrect value for errno when sending the end reason.
      Bugfix on 0.1.0.1-rc.
    - Correctly handle an "impossible" overflow cases in connection byte
      counting, where we write or read more than 4GB on an edge connection
      in a single second. Bugfix on 0.1.2.8-beta.
    - Correct the warning displayed when a rendezvous descriptor exceeds
      the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
      John Brooks.
    - Clients and hidden services now use HSDir-flagged relays for hidden
      service descriptor downloads and uploads even if the relays have no
      DirPort set and the client has disabled TunnelDirConns. This will
      eventually allow us to give the HSDir flag to relays with no
      DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
    - Downgrade "no current certificates known for authority" message from
      Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
    - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
      2917. Bugfix on 0.1.1.1-alpha.
    - Only limit the lengths of single HS descriptors, even when multiple
      HS descriptors are published to an HSDir relay in a single POST
      operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
    - Write the current time into the LastWritten line in our state file,
      rather than the time from the previous write attempt. Also, stop
      trying to use a time of -1 in our log statements. Fixes bug 3039;
      bugfix on 0.2.2.14-alpha.
    - Be more consistent in our treatment of file system paths. "~" should
      get expanded to the user's home directory in the Log config option.
      Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
      feature for the -f and --DataDirectory options.

  o Minor features:
    - Make sure every relay writes a state file at least every 12 hours.
      Previously, a relay could go for weeks without writing its state
      file, and on a crash could lose its bandwidth history, capacity
      estimates, client country statistics, and so on. Addresses bug 3012.
    - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
      Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
      clients are already deprecated because of security bugs.
    - Don't allow v0 hidden service authorities to act as clients.
      Required by fix for bug 3000.
    - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
      by fix for bug 3000.
    - Ensure that no empty [dirreq-](read|write)-history lines are added
      to an extrainfo document. Implements ticket 2497.

  o Code simplification and refactoring:
    - Remove workaround code to handle directory responses from servers
      that had bug 539 (they would send HTTP status 503 responses _and_
      send a body too). Since only server versions before
      0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
      keep the workaround in place.
    - Remove the old 'fuzzy time' logic. It was supposed to be used for
      handling calculations where we have a known amount of clock skew and
      an allowed amount of unknown skew. But we only used it in three
      places, and we never adjusted the known/unknown skew values. This is
      still something we might want to do someday, but if we do, we'll
      want to do it differently.
    - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
      None of the cases where we did this before were wrong, but by making
      this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
    - Use GetTempDir to find the proper temporary directory location on
      Windows when generating temporary files for the unit tests. Patch by
      Gisle Vanem.


Changes in version 0.2.2.24-alpha - 2011-04-08
  Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
  prevented Tor clients from effectively using "multihomed" bridges,
  that is, bridges that listen on multiple ports or IP addresses so users
  can continue to use some of their addresses even if others get blocked.

  o Major bugfixes:
    - Fix a bug where bridge users who configure the non-canonical
      address of a bridge automatically switch to its canonical
      address. If a bridge listens at more than one address, it should be
      able to advertise those addresses independently and any non-blocked
      addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
      bug 2510.
    - If you configured Tor to use bridge A, and then quit and
      configured Tor to use bridge B instead, it would happily continue
      to use bridge A if it's still reachable. While this behavior is
      a feature if your goal is connectivity, in some scenarios it's a
      dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
    - Directory authorities now use data collected from their own
      uptime observations when choosing whether to assign the HSDir flag
      to relays, instead of trusting the uptime value the relay reports in
      its descriptor. This change helps prevent an attack where a small
      set of nodes with frequently-changing identity keys can blackhole
      a hidden service. (Only authorities need upgrade; others will be
      fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.

  o Minor bugfixes:
    - When we restart our relay, we might get a successful connection
      from the outside before we've started our reachability tests,
      triggering a warning: "ORPort found reachable, but I have no
      routerinfo yet. Failing to inform controller of success." This
      bug was harmless unless Tor is running under a controller
      like Vidalia, in which case the controller would never get a
      REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
      fixes bug 1172.
    - Make directory authorities more accurate at recording when
      relays that have failed several reachability tests became
      unreachable, so we can provide more accuracy at assigning Stable,
      Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
    - Fix an issue that prevented static linking of libevent on
      some platforms (notably Linux). Fixes bug 2698; bugfix on
      versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
      the --with-static-libevent configure option).
    - We now ask the other side of a stream (the client or the exit)
      for more data on that stream when the amount of queued data on
      that stream dips low enough. Previously, we wouldn't ask the
      other side for more data until either it sent us more data (which
      it wasn't supposed to do if it had exhausted its window!) or we
      had completely flushed all our queued data. This flow control fix
      should improve throughput. Fixes bug 2756; bugfix on the earliest
      released versions of Tor (svn commit r152).
    - Avoid a double-mark-for-free warning when failing to attach a
      transparent proxy connection. (We thought we had fixed this in
      0.2.2.23-alpha, but it turns out our fix was checking the wrong
      connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
      bug) and 0.2.2.23-alpha (the incorrect fix).
    - When warning about missing zlib development packages during compile,
      give the correct package names. Bugfix on 0.2.0.1-alpha.

  o Minor features:
    - Directory authorities now log the source of a rejected POSTed v3
      networkstatus vote.
    - Make compilation with clang possible when using
      --enable-gcc-warnings by removing two warning options that clang
      hasn't implemented yet and by fixing a few warnings. Implements
      ticket 2696.
    - When expiring circuits, use microsecond timers rather than
      one-second timers. This can avoid an unpleasant situation where a
      circuit is launched near the end of one second and expired right
      near the beginning of the next, and prevent fluctuations in circuit
      timeout values.
    - Use computed circuit-build timeouts to decide when to launch
      parallel introduction circuits for hidden services. (Previously,
      we would retry after 15 seconds.)
    - Update to the April 1 2011 Maxmind GeoLite Country database.

  o Packaging fixes:
    - Create the /var/run/tor directory on startup on OpenSUSE if it is
      not already created. Patch from Andreas Stieger. Fixes bug 2573.

  o Documentation changes:
    - Modernize the doxygen configuration file slightly. Fixes bug 2707.
    - Resolve all doxygen warnings except those for missing documentation.
      Fixes bug 2705.
    - Add doxygen documentation for more functions, fields, and types.


Changes in version 0.2.2.23-alpha - 2011-03-08
  Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
  they restart they don't lose their bandwidth capacity estimate. This
  release also fixes a diverse set of user-facing bugs, ranging from
  relays overrunning their rate limiting to clients falsely warning about
  clock skew to bridge descriptor leaks by our bridge directory authority.

  o Major bugfixes:
    - Stop sending a CLOCK_SKEW controller status event whenever
      we fetch directory information from a relay that has a wrong clock.
      Instead, only inform the controller when it's a trusted authority
      that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
      the rest of bug 1074.
    - Fix an assert in parsing router descriptors containing IPv6
      addresses. This one took down the directory authorities when
      somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
    - Make the bridge directory authority refuse to answer directory
      requests for "all" descriptors. It used to include bridge
      descriptors in its answer, which was a major information leak.
      Found by "piebeer". Bugfix on 0.2.0.3-alpha.
    - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
      Tor would ignore their RelayBandwidthBurst setting,
      potentially using more bandwidth than expected. Bugfix on
      0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
    - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
      hidserv" in her torrc. The 'hidserv' argument never controlled
      publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.

  o Major features:
    - Relays now save observed peak bandwidth throughput rates to their
      state file (along with total usage, which was already saved)
      so that they can determine their correct estimated bandwidth on
      restart. Resolves bug 1863, where Tor relays would reset their
      estimated bandwidth to 0 after restarting.
    - Directory authorities now take changes in router IP address and
      ORPort into account when determining router stability. Previously,
      if a router changed its IP or ORPort, the authorities would not
      treat it as having any downtime for the purposes of stability
      calculation, whereas clients would experience downtime since the
      change could take a while to propagate to them. Resolves issue 1035.
    - Enable Address Space Layout Randomization (ASLR) and Data Execution
      Prevention (DEP) by default on Windows to make it harder for
      attackers to exploit vulnerabilities. Patch from John Brooks.

  o Minor bugfixes (on 0.2.1.x and earlier):
    - Fix a rare crash bug that could occur when a client was configured
      with a large number of bridges. Fixes bug 2629; bugfix on
      0.2.1.2-alpha. Bugfix by trac user "shitlei".
    - Avoid a double mark-for-free warning when failing to attach a
      transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
      bug 2279.
    - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
      found by "cypherpunks". This bug was introduced before the first
      Tor release, in svn commit r110.
    - Country codes aren't supported in EntryNodes until 0.2.3.x, so
      don't mention them in the manpage. Fixes bug 2450; issue
      spotted by keb and G-Lo.
    - Fix a bug in bandwidth history state parsing that could have been
      triggered if a future version of Tor ever changed the timing
      granularity at which bandwidth history is measured. Bugfix on
      Tor 0.1.1.11-alpha.
    - When a relay decides that its DNS is too broken for it to serve
      as an exit server, it advertised itself as a non-exit, but
      continued to act as an exit. This could create accidental
      partitioning opportunities for users. Instead, if a relay is
      going to advertise reject *:* as its exit policy, it should
      really act with exit policy "reject *:*". Fixes bug 2366.
      Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
    - In the special case where you configure a public exit relay as your
      bridge, Tor would be willing to use that exit relay as the last
      hop in your circuit as well. Now we fail that circuit instead.
      Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
    - Fix a bug with our locking implementation on Windows that couldn't
      correctly detect when a file was already locked. Fixes bug 2504,
      bugfix on 0.2.1.6-alpha.
    - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
      Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
      "piebeer".
    - Set target port in get_interface_address6() correctly. Bugfix
      on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
    - Directory authorities are now more robust to hops back in time
      when calculating router stability. Previously, if a run of uptime
      or downtime appeared to be negative, the calculation could give
      incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
      bug 1035.
    - Fix an assert that got triggered when using the TestingTorNetwork
      configuration option and then issuing a GETINFO config-text control
      command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.

  o Minor bugfixes (on 0.2.2.x):
    - Clients should not weight BadExit nodes as Exits in their node
      selection. Similarly, directory authorities should not count BadExit
      bandwidth as Exit bandwidth when computing bandwidth-weights.
      Bugfix on 0.2.2.10-alpha; fixes bug 2203.
    - Correctly clear our dir_read/dir_write history when there is an
      error parsing any bw history value from the state file. Bugfix on
      Tor 0.2.2.15-alpha.
    - Resolve a bug in verifying signatures of directory objects
      with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
      Fixes bug 2409. Found by "piebeer".
    - Bridge authorities no longer crash on SIGHUP when they try to
      publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
      on 0.2.2.22-alpha.

  o Minor features:
    - Log less aggressively about circuit timeout changes, and improve
      some other circuit timeout messages. Resolves bug 2004.
    - Log a little more clearly about the times at which we're no longer
      accepting new connections. Resolves bug 2181.
    - Reject attempts at the client side to open connections to private
      IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
      a randomly chosen exit node. Attempts to do so are always
      ill-defined, generally prevented by exit policies, and usually
      in error. This will also help to detect loops in transparent
      proxy configurations. You can disable this feature by setting
      "ClientRejectInternalAddresses 0" in your torrc.
    - Always treat failure to allocate an RSA key as an unrecoverable
      allocation error.
    - Update to the March 1 2011 Maxmind GeoLite Country database.

  o Minor features (log subsystem):
    - Add documentation for configuring logging at different severities in
      different log domains. We've had this feature since 0.2.1.1-alpha,
      but for some reason it never made it into the manpage. Fixes
      bug 2215.
    - Make it simpler to specify "All log domains except for A and B".
      Previously you needed to say "[*,~A,~B]". Now you can just say
      "[~A,~B]".
    - Add a "LogMessageDomains 1" option to include the domains of log
      messages along with the messages. Without this, there's no way
      to use log domains without reading the source or doing a lot
      of guessing.

  o Packaging changes:
    - Stop shipping the Tor specs files and development proposal documents
      in the tarball. They are now in a separate git repository at
      git://git.torproject.org/torspec.git


Changes in version 0.2.1.30 - 2011-02-23
  Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
  change is a slight tweak to Tor's TLS handshake that makes relays
  and bridges that run this new version reachable from Iran again.
  We don't expect this tweak will win the arms race long-term, but it
  buys us time until we roll out a better solution.

  o Major bugfixes:
    - Stop sending a CLOCK_SKEW controller status event whenever
      we fetch directory information from a relay that has a wrong clock.
      Instead, only inform the controller when it's a trusted authority
      that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
      the rest of bug 1074.
    - Fix a bounds-checking error that could allow an attacker to
      remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
      Found by "piebeer".
    - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
      Tor would ignore their RelayBandwidthBurst setting,
      potentially using more bandwidth than expected. Bugfix on
      0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
    - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
      hidserv" in her torrc. The 'hidserv' argument never controlled
      publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.

  o Minor features:
    - Adjust our TLS Diffie-Hellman parameters to match those used by
      Apache's mod_ssl.
    - Update to the February 1 2011 Maxmind GeoLite Country database.

  o Minor bugfixes:
    - Check for and reject overly long directory certificates and
      directory tokens before they have a chance to hit any assertions.
      Bugfix on 0.2.1.28. Found by "doorss".
    - Bring the logic that gathers routerinfos and assesses the
      acceptability of circuits into line. This prevents a Tor OP from
      getting locked in a cycle of choosing its local OR as an exit for a
      path (due to a .exit request) and then rejecting the circuit because
      its OR is not listed yet. It also prevents Tor clients from using an
      OR running in the same instance as an exit (due to a .exit request)
      if the OR does not meet the same requirements expected of an OR
      running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.

  o Packaging changes:
    - Stop shipping the Tor specs files and development proposal documents
      in the tarball. They are now in a separate git repository at
      git://git.torproject.org/torspec.git
    - Do not include Git version tags as though they are SVN tags when
      generating a tarball from inside a repository that has switched
      between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.


Changes in version 0.2.2.22-alpha - 2011-01-25
  Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
  main other change is a slight tweak to Tor's TLS handshake that makes
  relays and bridges that run this new version reachable from Iran again.
  We don't expect this tweak will win the arms race long-term, but it
  will buy us a bit more time until we roll out a better solution.

  o Major bugfixes:
    - Fix a bounds-checking error that could allow an attacker to
      remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
      Found by "piebeer".
    - Don't assert when changing from bridge to relay or vice versa
      via the controller. The assert happened because we didn't properly
      initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
      bug 2433. Reported by bastik.

  o Minor features:
    - Adjust our TLS Diffie-Hellman parameters to match those used by
      Apache's mod_ssl.
    - Provide a log message stating which geoip file we're parsing
      instead of just stating that we're parsing the geoip file.
      Implements ticket 2432.

  o Minor bugfixes:
    - Check for and reject overly long directory certificates and
      directory tokens before they have a chance to hit any assertions.
      Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".


Changes in version 0.2.2.21-alpha - 2011-01-15
  Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
  continues our recent code security audit work. The main fix resolves
  a remote heap overflow vulnerability that can allow remote code
  execution (CVE-2011-0427). Other fixes address a variety of assert
  and crash bugs, most of which we think are hard to exploit remotely.

  o Major bugfixes (security), also included in 0.2.1.29:
    - Fix a heap overflow bug where an adversary could cause heap
      corruption. This bug probably allows remote code execution
      attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
      0.1.2.10-rc.
    - Prevent a denial-of-service attack by disallowing any
      zlib-compressed data whose compression factor is implausibly
      high. Fixes part of bug 2324; reported by "doorss".
    - Zero out a few more keys in memory before freeing them. Fixes
      bug 2384 and part of bug 2385. These key instances found by
      "cypherpunks", based on Andrew Case's report about being able
      to find sensitive data in Tor's memory space if you have enough
      permissions. Bugfix on 0.0.2pre9.

  o Major bugfixes (crashes), also included in 0.2.1.29:
    - Prevent calls to Libevent from inside Libevent log handlers.
      This had potential to cause a nasty set of crashes, especially
      if running Libevent with debug logging enabled, and running
      Tor with a controller watching for low-severity log messages.
      Bugfix on 0.1.0.2-rc. Fixes bug 2190.
    - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
      underflow errors there too. Fixes the other part of bug 2324.
    - Fix a bug where we would assert if we ever had a
      cached-descriptors.new file (or another file read directly into
      memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
      on 0.2.1.25. Found by doorss.
    - Fix some potential asserts and parsing issues with grossly
      malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
      Found by doorss.

  o Minor bugfixes (other), also included in 0.2.1.29:
    - Fix a bug with handling misformed replies to reverse DNS lookup
      requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
      bug reported by doorss.
    - Fix compilation on mingw when a pthreads compatibility library
      has been installed. (We don't want to use it, so we shouldn't
      be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
    - Fix a bug where we would declare that we had run out of virtual
      addresses when the address space was only half-exhausted. Bugfix
      on 0.1.2.1-alpha.
    - Correctly handle the case where AutomapHostsOnResolve is set but
      no virtual addresses are available. Fixes bug 2328; bugfix on
      0.1.2.1-alpha. Bug found by doorss.
    - Correctly handle wrapping around when we run out of virtual
      address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.

  o Minor features, also included in 0.2.1.29:
    - Update to the January 1 2011 Maxmind GeoLite Country database.
    - Introduce output size checks on all of our decryption functions.

  o Build changes, also included in 0.2.1.29:
    - Tor does not build packages correctly with Automake 1.6 and earlier;
      added a check to Makefile.am to make sure that we're building with
      Automake 1.7 or later.
    - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
      because we built it with a too-old version of automake. Thus that
      release broke ./configure --enable-openbsd-malloc, which is popular
      among really fast exit relays on Linux.

  o Major bugfixes, new in 0.2.2.21-alpha:
    - Prevent crash/heap corruption when the cbtnummodes consensus
      parameter is set to 0 or large values. Fixes bug 2317; bugfix
      on 0.2.2.14-alpha.

  o Major features, new in 0.2.2.21-alpha:
    - Introduce minimum/maximum values that clients will believe
      from the consensus. Now we'll have a better chance to avoid crashes
      or worse when a consensus param has a weird value.

  o Minor features, new in 0.2.2.21-alpha:
    - Make sure to disable DirPort if running as a bridge. DirPorts aren't
      used on bridges, and it makes bridge scanning somewhat easier.
    - If writing the state file to disk fails, wait up to an hour before
      retrying again, rather than trying again each second. Fixes bug
      2346; bugfix on Tor 0.1.1.3-alpha.
    - Make Libevent log messages get delivered to controllers later,
      and not from inside the Libevent log handler. This prevents unsafe
      reentrant Libevent calls while still letting the log messages
      get through.
    - Detect platforms that brokenly use a signed size_t, and refuse to
      build there. Found and analyzed by doorss and rransom.
    - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
      Resolves bug 2314.

  o Minor bugfixes, new in 0.2.2.21-alpha:
    - Handle SOCKS messages longer than 128 bytes long correctly, rather
      than waiting forever for them to finish. Fixes bug 2330; bugfix
      on 0.2.0.16-alpha. Found by doorss.
    - Add assertions to check for overflow in arguments to
      base32_encode() and base32_decode(); fix a signed-unsigned
      comparison there too. These bugs are not actually reachable in Tor,
      but it's good to prevent future errors too. Found by doorss.
    - Correctly detect failures to create DNS requests when using Libevent
      versions before v2. (Before Libevent 2, we used our own evdns
      implementation. Its return values for Libevent's evdns_resolve_*()
      functions are not consistent with those from Libevent.) Fixes bug
      2363; bugfix on 0.2.2.6-alpha. Found by "lodger".

  o Documentation, new in 0.2.2.21-alpha:
    - Document the default socks host and port (127.0.0.1:9050) for
      tor-resolve.


Changes in version 0.2.1.29 - 2011-01-15
  Tor 0.2.1.29 continues our recent code security audit work. The main
  fix resolves a remote heap overflow vulnerability that can allow remote
  code execution. Other fixes address a variety of assert and crash bugs,
  most of which we think are hard to exploit remotely.

  o Major bugfixes (security):
    - Fix a heap overflow bug where an adversary could cause heap
      corruption. This bug probably allows remote code execution
      attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
      0.1.2.10-rc.
    - Prevent a denial-of-service attack by disallowing any
      zlib-compressed data whose compression factor is implausibly
      high. Fixes part of bug 2324; reported by "doorss".
    - Zero out a few more keys in memory before freeing them. Fixes
      bug 2384 and part of bug 2385. These key instances found by
      "cypherpunks", based on Andrew Case's report about being able
      to find sensitive data in Tor's memory space if you have enough
      permissions. Bugfix on 0.0.2pre9.

  o Major bugfixes (crashes):
    - Prevent calls to Libevent from inside Libevent log handlers.
      This had potential to cause a nasty set of crashes, especially
      if running Libevent with debug logging enabled, and running
      Tor with a controller watching for low-severity log messages.
      Bugfix on 0.1.0.2-rc. Fixes bug 2190.
    - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
      underflow errors there too. Fixes the other part of bug 2324.
    - Fix a bug where we would assert if we ever had a
      cached-descriptors.new file (or another file read directly into
      memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
      on 0.2.1.25. Found by doorss.
    - Fix some potential asserts and parsing issues with grossly
      malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
      Found by doorss.

  o Minor bugfixes (other):
    - Fix a bug with handling misformed replies to reverse DNS lookup
      requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
      bug reported by doorss.
    - Fix compilation on mingw when a pthreads compatibility library
      has been installed. (We don't want to use it, so we shouldn't
      be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
    - Fix a bug where we would declare that we had run out of virtual
      addresses when the address space was only half-exhausted. Bugfix
      on 0.1.2.1-alpha.
    - Correctly handle the case where AutomapHostsOnResolve is set but
      no virtual addresses are available. Fixes bug 2328; bugfix on
      0.1.2.1-alpha. Bug found by doorss.
    - Correctly handle wrapping around to when we run out of virtual
      address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
    - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
      because we built it with a too-old version of automake. Thus that
      release broke ./configure --enable-openbsd-malloc, which is popular
      among really fast exit relays on Linux.

  o Minor features:
    - Update to the January 1 2011 Maxmind GeoLite Country database.
    - Introduce output size checks on all of our decryption functions.

  o Build changes:
    - Tor does not build packages correctly with Automake 1.6 and earlier;
      added a check to Makefile.am to make sure that we're building with
      Automake 1.7 or later.


Changes in version 0.2.2.20-alpha - 2010-12-17
  Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
  exploitable bugs. We also fix a variety of other significant bugs,
  change the IP address for one of our directory authorities, and update
  the minimum version that Tor relays must run to join the network.

  o Major bugfixes:
    - Fix a remotely exploitable bug that could be used to crash instances
      of Tor remotely by overflowing on the heap. Remote-code execution
      hasn't been confirmed, but can't be ruled out. Everyone should
      upgrade. Bugfix on the 0.1.1 series and later.
    - Fix a bug that could break accounting on 64-bit systems with large
      time_t values, making them hibernate for impossibly long intervals.
      Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
    - Fix a logic error in directory_fetches_from_authorities() that
      would cause all _non_-exits refusing single-hop-like circuits
      to fetch from authorities, when we wanted to have _exits_ fetch
      from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
      fix by boboper.
    - Fix a stream fairness bug that would cause newer streams on a given
      circuit to get preference when reading bytes from the origin or
      destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
      introduced before the first Tor release, in svn revision r152.

  o Directory authority changes:
    - Change IP address and ports for gabelmoo (v3 directory authority).

  o Minor bugfixes:
    - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
      Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
    - Fix an off-by-one error in calculating some controller command
      argument lengths. Fortunately, this mistake is harmless since
      the controller code does redundant NUL termination too. Found by
      boboper. Bugfix on 0.1.1.1-alpha.
    - Do not dereference NULL if a bridge fails to build its
      extra-info descriptor. Found by an anonymous commenter on
      Trac. Bugfix on 0.2.2.19-alpha.

  o Minor features:
    - Update to the December 1 2010 Maxmind GeoLite Country database.
    - Directory authorities now reject relays running any versions of
      Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
      known bugs that keep RELAY_EARLY cells from working on rendezvous
      circuits. Followup to fix for bug 2081.
    - Directory authorities now reject relays running any version of Tor
      older than 0.2.0.26-rc. That version is the earliest that fetches
      current directory information correctly. Fixes bug 2156.
    - Report only the top 10 ports in exit-port stats in order not to
      exceed the maximum extra-info descriptor length of 50 KB. Implements
      task 2196.


Changes in version 0.2.1.28 - 2010-12-17
  Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
  exploitable bugs. We also took this opportunity to change the IP address
  for one of our directory authorities, and to update the geoip database
  we ship.

  o Major bugfixes:
    - Fix a remotely exploitable bug that could be used to crash instances
      of Tor remotely by overflowing on the heap. Remote-code execution
      hasn't been confirmed, but can't be ruled out. Everyone should
      upgrade. Bugfix on the 0.1.1 series and later.

  o Directory authority changes:
    - Change IP address and ports for gabelmoo (v3 directory authority).

  o Minor features:
    - Update to the December 1 2010 Maxmind GeoLite Country database.


Changes in version 0.2.1.27 - 2010-11-23
  Yet another OpenSSL security patch broke its compatibility with Tor:
  Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
  also took this opportunity to fix several crash bugs, integrate a new
  directory authority, and update the bundled GeoIP database.

  o Major bugfixes:
    - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
      No longer set the tlsext_host_name extension on server SSL objects;
      but continue to set it on client SSL objects. Our goal in setting
      it was to imitate a browser, not a vhosting server. Fixes bug 2204;
      bugfix on 0.2.1.1-alpha.
    - Do not log messages to the controller while shrinking buffer
      freelists. Doing so would sometimes make the controller connection
      try to allocate a buffer chunk, which would mess up the internals
      of the freelist and cause an assertion failure. Fixes bug 1125;
      fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
    - Learn our external IP address when we're a relay or bridge, even if
      we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
      where we introduced bridge relays that don't need to publish to
      be useful. Fixes bug 2050.
    - Do even more to reject (and not just ignore) annotations on
      router descriptors received anywhere but from the cache. Previously
      we would ignore such annotations at first, but cache them to disk
      anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
    - When you're using bridges and your network goes away and your
      bridges get marked as down, recover when you attempt a new socks
      connection (if the network is back), rather than waiting up to an
      hour to try fetching new descriptors for your bridges. Bugfix on
      0.2.0.3-alpha; fixes bug 1981.

  o Major features:
    - Move to the November 2010 Maxmind GeoLite country db (rather
      than the June 2009 ip-to-country GeoIP db) for our statistics that
      count how many users relays are seeing from each country. Now we'll
      have more accurate data, especially for many African countries.

  o New directory authorities:
    - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
      authority.

  o Minor bugfixes:
    - Fix an assertion failure that could occur in directory caches or
      bridge users when using a very short voting interval on a testing
      network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
      0.2.0.8-alpha.
    - Enforce multiplicity rules when parsing annotations. Bugfix on
      0.2.0.8-alpha. Found by piebeer.
    - Allow handshaking OR connections to take a full KeepalivePeriod
      seconds to handshake. Previously, we would close them after
      IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
      were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
      for analysis help.
    - When building with --enable-gcc-warnings on OpenBSD, disable
      warnings in system headers. This makes --enable-gcc-warnings
      pass on OpenBSD 4.8.

  o Minor features:
    - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
      and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
      stream ending reason for this case: END_STREAM_REASON_NOROUTE.
      Servers can start sending this code when enough clients recognize
      it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
    - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
      Patch from mingw-san.

  o Removed files:
    - Remove the old debian/ directory from the main Tor distribution.
      The official Tor-for-debian git repository lives at the URL
      https://git.torproject.org/debian/tor.git
    - Stop shipping the old doc/website/ directory in the tarball. We
      changed the website format in late 2010, and what we shipped in
      0.2.1.26 really wasn't that useful anyway.


Changes in version 0.2.2.19-alpha - 2010-11-22
  Yet another OpenSSL security patch broke its compatibility with Tor:
  Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.

  o Major bugfixes:
    - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
      No longer set the tlsext_host_name extension on server SSL objects;
      but continue to set it on client SSL objects. Our goal in setting
      it was to imitate a browser, not a vhosting server. Fixes bug 2204;
      bugfix on 0.2.1.1-alpha.

  o Minor bugfixes:
    - Try harder not to exceed the maximum length of 50 KB when writing
      statistics to extra-info descriptors. This bug was triggered by very
      fast relays reporting exit-port, entry, and dirreq statistics.
      Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
    - Publish a router descriptor even if generating an extra-info
      descriptor fails. Previously we would not publish a router
      descriptor without an extra-info descriptor; this can cause fast
      exit relays collecting exit-port statistics to drop from the
      consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.


Changes in version 0.2.2.18-alpha - 2010-11-16
  Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
  us lately, makes unpublished bridge relays able to detect their IP
  address, and fixes a wide variety of other bugs to get us much closer
  to a stable release.

  o Major bugfixes:
    - Do even more to reject (and not just ignore) annotations on
      router descriptors received anywhere but from the cache. Previously
      we would ignore such annotations at first, but cache them to disk
      anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
    - Do not log messages to the controller while shrinking buffer
      freelists. Doing so would sometimes make the controller connection
      try to allocate a buffer chunk, which would mess up the internals
      of the freelist and cause an assertion failure. Fixes bug 1125;
      fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
    - Learn our external IP address when we're a relay or bridge, even if
      we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
      where we introduced bridge relays that don't need to publish to
      be useful. Fixes bug 2050.
    - Maintain separate TLS contexts and certificates for incoming and
      outgoing connections in bridge relays. Previously we would use the
      same TLS contexts and certs for incoming and outgoing connections.
      Bugfix on 0.2.0.3-alpha; addresses bug 988.
    - Maintain separate identity keys for incoming and outgoing TLS
      contexts in bridge relays. Previously we would use the same
      identity keys for incoming and outgoing TLS contexts. Bugfix on
      0.2.0.3-alpha; addresses the other half of bug 988.
    - Avoid an assertion failure when we as an authority receive a
      duplicate upload of a router descriptor that we already have,
      but which we previously considered an obsolete descriptor.
      Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
    - Avoid a crash bug triggered by looking at a dangling pointer while
      setting the network status consensus. Found by Robert Ransom.
      Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
    - Fix a logic error where servers that _didn't_ act as exits would
      try to keep their server lists more aggressively up to date than
      exits, when it was supposed to be the other way around. Bugfix
      on 0.2.2.17-alpha.

  o Minor bugfixes (on Tor 0.2.1.x and earlier):
    - When we're trying to guess whether we know our IP address as
      a relay, we would log various ways that we failed to guess
      our address, but never log that we ended up guessing it
      successfully. Now add a log line to help confused and anxious
      relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
    - Bring the logic that gathers routerinfos and assesses the
      acceptability of circuits into line. This prevents a Tor OP from
      getting locked in a cycle of choosing its local OR as an exit for a
      path (due to a .exit request) and then rejecting the circuit because
      its OR is not listed yet. It also prevents Tor clients from using an
      OR running in the same instance as an exit (due to a .exit request)
      if the OR does not meet the same requirements expected of an OR
      running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
    - Correctly describe errors that occur when generating a TLS object.
      Previously we would attribute them to a failure while generating a
      TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
      bug 1994.
    - Enforce multiplicity rules when parsing annotations. Bugfix on
      0.2.0.8-alpha. Found by piebeer.
    - Fix warnings that newer versions of autoconf produced during
      ./autogen.sh. These warnings appear to be harmless in our case,
      but they were extremely verbose. Fixes bug 2020.

  o Minor bugfixes (on Tor 0.2.2.x):
    - Enable protection of small arrays whenever we build with gcc
      hardening features, not only when also building with warnings
      enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.

  o Minor features:
    - Make hidden services work better in private Tor networks by not
      requiring any uptime to join the hidden service descriptor
      DHT. Implements ticket 2088.
    - Rate-limit the "your application is giving Tor only an IP address"
      warning. Addresses bug 2000; bugfix on 0.0.8pre2.
    - When AllowSingleHopExits is set, print a warning to explain to the
      relay operator why most clients are avoiding her relay.
    - Update to the November 1 2010 Maxmind GeoLite Country database.

  o Code simplifications and refactoring:
    - When we fixed bug 1038 we had to put in a restriction not to send
      RELAY_EARLY cells on rend circuits. This was necessary as long
      as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
      active. Now remove this obsolete check. Resolves bug 2081.
    - Some options used different conventions for uppercasing of acronyms
      when comparing manpage and source. Fix those in favor of the
      manpage, as it makes sense to capitalize acronyms.
    - Remove the torrc.complete file. It hasn't been kept up to date
      and users will have better luck checking out the manpage.
    - Remove the obsolete "NoPublish" option; it has been flagged
      as obsolete and has produced a warning since 0.1.1.18-rc.
    - Remove everything related to building the expert bundle for OS X.
      It has confused many users, doesn't work right on OS X 10.6,
      and is hard to get rid of once installed. Resolves bug 1274.


Changes in version 0.2.2.17-alpha - 2010-09-30
  Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
  to use one-hop circuits (which can put the exit relays at higher risk,
  plus unbalance the network); fixes a big bug in bandwidth accounting
  for relays that want to limit their monthly bandwidth use; fixes a
  big pile of bugs in how clients tolerate temporary network failure;
  and makes our adaptive circuit build timeout feature (which improves
  client performance if your network is fast while not breaking things
  if your network is slow) better handle bad networks.

  o Major features:
    - Exit relays now try harder to block exit attempts from unknown
      relays, to make it harder for people to use them as one-hop proxies
      a la tortunnel. Controlled by the refuseunknownexits consensus
      parameter (currently enabled), or you can override it on your
      relay with the RefuseUnknownExits torrc option. Resolves bug 1751.

  o Major bugfixes (0.2.1.x and earlier):
    - Fix a bug in bandwidth accounting that could make us use twice
      the intended bandwidth when our interval start changes due to
      daylight saving time. Now we tolerate skew in stored vs computed
      interval starts: if the start of the period changes by no more than
      50% of the period's duration, we remember bytes that we transferred
      in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
    - Always search the Windows system directory for system DLLs, and
      nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
    - When you're using bridges and your network goes away and your
      bridges get marked as down, recover when you attempt a new socks
      connection (if the network is back), rather than waiting up to an
      hour to try fetching new descriptors for your bridges. Bugfix on
      0.2.0.3-alpha; fixes bug 1981.

  o Major bugfixes (on 0.2.2.x):
    - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
      bug 1797.
    - Fix a segfault that could happen when operating a bridge relay with
      no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
    - The consensus bandwidth-weights (used by clients to choose fast
      relays) entered an unexpected edge case in September where
      Exits were much scarcer than Guards, resulting in bad weight
      recommendations. Now we compute them using new constraints that
      should succeed in all cases. Also alter directory authorities to
      not include the bandwidth-weights line if they fail to produce
      valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
    - When weighting bridges during path selection, we used to trust
      the bandwidths they provided in their descriptor, only capping them
      at 10MB/s. This turned out to be problematic for two reasons:
      Bridges could claim to handle a lot more traffic then they
      actually would, thus making more clients pick them and have a
      pretty effective DoS attack. The other issue is that new bridges
      that might not have a good estimate for their bw capacity yet
      would not get used at all unless no other bridges are available
      to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.

  o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
    - Ignore cannibalized circuits when recording circuit build times.
      This should provide for a minor performance improvement for hidden
      service users using 0.2.2.14-alpha, and should remove two spurious
      notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
    - Simplify the logic that causes us to decide if the network is
      unavailable for purposes of recording circuit build times. If we
      receive no cells whatsoever for the entire duration of a circuit's
      full measured lifetime, the network is probably down. Also ignore
      one-hop directory fetching circuit timeouts when calculating our
      circuit build times. These changes should hopefully reduce the
      cases where we see ridiculous circuit build timeouts for people
      with spotty wireless connections. Fixes part of bug 1772; bugfix
      on 0.2.2.2-alpha.
    - Prevent the circuit build timeout from becoming larger than
      the maximum build time we have ever seen. Also, prevent the time
      period for measurement circuits from becoming larger than twice that
      value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.

  o Minor features:
    - When we run out of directory information such that we can't build
      circuits, but then get enough that we can build circuits, log when
      we actually construct a circuit, so the user has a better chance of
      knowing what's going on. Fixes bug 1362.
    - Be more generous with how much bandwidth we'd use up (with
      accounting enabled) before entering "soft hibernation". Previously,
      we'd refuse new connections and circuits once we'd used up 95% of
      our allotment. Now, we use up 95% of our allotment, AND make sure
      that we have no more than 500MB (or 3 hours of expected traffic,
      whichever is lower) remaining before we enter soft hibernation.
    - If we've configured EntryNodes and our network goes away and/or all
      our entrynodes get marked down, optimistically retry them all when
      a new socks application request appears. Fixes bug 1882.
    - Add some more defensive programming for architectures that can't
      handle unaligned integer accesses. We don't know of any actual bugs
      right now, but that's the best time to fix them. Fixes bug 1943.
    - Support line continuations in the torrc config file. If a line
      ends with a si