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CVS log for src/crypto/external/bsd/openssh/dist/sshsig.h

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Default branch: OPENSSH, MAIN


Revision 1.1.1.5.4.2 / (download) - annotate - [select for diffs], Mon Dec 25 12:31:10 2023 UTC (3 months ago) by martin
Branch: netbsd-9
Changes since 1.1.1.5.4.1: +111 -0 lines
Diff to previous 1.1.1.5.4.1 (colored) to branchpoint 1.1.1.5 (colored) to selected 1.1.1.5 (colored)

Pull up the following, requested by kim in ticket #1780:

	crypto/external/bsd/openssh/Makefile.inc        up to 1.15 (+patch)
	crypto/external/bsd/openssh/bin/Makefile.inc    up to 1.4
	crypto/external/bsd/openssh/bin/scp/Makefile    up to 1.6
	crypto/external/bsd/openssh/bin/sftp/Makefile   up to 1.11
	crypto/external/bsd/openssh/bin/sftp-server/Makefile up to 1.4
	crypto/external/bsd/openssh/bin/ssh/Makefile    up to 1.20
	crypto/external/bsd/openssh/bin/ssh-add/Makefile up to 1.3
	crypto/external/bsd/openssh/bin/ssh-agent/Makefile up to 1.7
	crypto/external/bsd/openssh/bin/ssh-keygen/Makefile up to 1.10
	crypto/external/bsd/openssh/bin/ssh-keyscan/Makefile up to 1.6
	crypto/external/bsd/openssh/bin/ssh-pkcs11-helper/Makefile up to 1.4
	crypto/external/bsd/openssh/bin/sshd/Makefile   up to 1.27 (+patch)
	crypto/external/bsd/openssh/dist/PROTOCOL.sshsig up to 1.1.1.2
	crypto/external/bsd/openssh/dist/srclimit.c     up to 1.3
	crypto/external/bsd/openssh/dist/sftp-realpath.c up to 1.3
	crypto/external/bsd/openssh/dist/sntrup761.c    up to 1.3
	crypto/external/bsd/openssh/dist/sntrup761.sh   up to 1.1.1.2
	crypto/external/bsd/openssh/dist/sshsig.c       up to 1.12
	crypto/external/bsd/openssh/dist/sshsig.h       up to 1.1.1.5
	crypto/external/bsd/openssh/dist/addr.c         up to 1.6
	crypto/external/bsd/openssh/dist/PROTOCOL.u2f   up to 1.1.1.3
	crypto/external/bsd/openssh/dist/sk-api.h       up to 1.1.1.6
	crypto/external/bsd/openssh/dist/sk-usbhid.c    up to 1.9
	crypto/external/bsd/openssh/dist/ssh-ecdsa-sk.c up to 1.4
	crypto/external/bsd/openssh/dist/ssh-ed25519-sk.c up to 1.5
	crypto/external/bsd/openssh/dist/ssh-sk-client.c up to 1.6
	crypto/external/bsd/openssh/dist/ssh-sk-helper.8 up to 1.1.1.2
	crypto/external/bsd/openssh/dist/ssh-sk-helper.c up to 1.7
	crypto/external/bsd/openssh/dist/ssh-sk.c       up to 1.8
	crypto/external/bsd/openssh/dist/ssh-sk.h       up to 1.1.1.2
	crypto/external/bsd/openssh/dist/sshbuf-io.c    up to 1.2
	crypto/external/bsd/openssh/dist/addr.h         up to 1.1.1.2
	crypto/external/bsd/openssh/dist/kexsntrup761x25519.c up to 1.3
	crypto/external/bsd/openssh/dist/cipher-chachapoly-libcrypto.c up to 1.3
	crypto/external/bsd/openssh/dist/srclimit.h     up to 1.1.1.1
	crypto/external/bsd/openssh/dist/auth2-pubkeyfile.c up to 1.3
	crypto/external/bsd/openssh/dist/sftp-usergroup.c up to 1.3
	crypto/external/bsd/openssh/dist/sftp-usergroup.h up to 1.1.1.1
	crypto/external/bsd/openssh/dist/ed25519.sh     up to 1.1.1.1
	crypto/external/bsd/openssh/dist/crc32.c        delete
	crypto/external/bsd/openssh/dist/crc32.h        delete
	crypto/external/bsd/openssh/dist/fe25519.c      delete
	crypto/external/bsd/openssh/dist/fe25519.h      delete
	crypto/external/bsd/openssh/dist/ge25519.c      delete
	crypto/external/bsd/openssh/dist/ge25519.h      delete
	crypto/external/bsd/openssh/dist/ge25519_base.data delete
	crypto/external/bsd/openssh/dist/kexsntrup4591761x25519.c delete
	crypto/external/bsd/openssh/dist/sc25519.c      delete
	crypto/external/bsd/openssh/dist/sc25519.h      delete
	crypto/external/bsd/openssh/dist/sntrup4591761.c delete
	crypto/external/bsd/openssh/dist/sntrup4591761.sh delete
	crypto/external/bsd/openssh/dist/uuencode.c     delete
	crypto/external/bsd/openssh/dist/uuencode.h     delete
	crypto/external/bsd/openssh/dist/verify.c       delete
	crypto/external/bsd/openssh/dist/LICENCE        up to 1.7
	crypto/external/bsd/openssh/dist/PROTOCOL       up to 1.23
	crypto/external/bsd/openssh/dist/PROTOCOL.agent up to 1.15
	crypto/external/bsd/openssh/dist/PROTOCOL.certkeys up to 1.13
	crypto/external/bsd/openssh/dist/PROTOCOL.chacha20poly1305 up to 1.1.1.4
	crypto/external/bsd/openssh/dist/PROTOCOL.key   up to 1.1.1.3
	crypto/external/bsd/openssh/dist/PROTOCOL.krl   up to 1.1.1.5
	crypto/external/bsd/openssh/dist/PROTOCOL.mux   up to 1.12
	crypto/external/bsd/openssh/dist/addrmatch.c    up to 1.15
	crypto/external/bsd/openssh/dist/auth-krb5.c    up to 1.16
	crypto/external/bsd/openssh/dist/auth-options.c up to 1.29
	crypto/external/bsd/openssh/dist/auth-options.h up to 1.15
	crypto/external/bsd/openssh/dist/auth-pam.c     up to 1.21
	crypto/external/bsd/openssh/dist/auth-passwd.c  up to 1.13
	crypto/external/bsd/openssh/dist/auth-rhosts.c  up to 1.16
	crypto/external/bsd/openssh/dist/auth.c         up to 1.34
	crypto/external/bsd/openssh/dist/auth.h         up to 1.23
	crypto/external/bsd/openssh/dist/auth2-chall.c  up to 1.19
	crypto/external/bsd/openssh/dist/auth2-gss.c    up to 1.17
	crypto/external/bsd/openssh/dist/auth2-hostbased.c up to 1.23
	crypto/external/bsd/openssh/dist/auth2-kbdint.c up to 1.15
	crypto/external/bsd/openssh/dist/auth2-krb5.c   up to 1.10
	crypto/external/bsd/openssh/dist/auth2-none.c   up to 1.14
	crypto/external/bsd/openssh/dist/auth2-passwd.c up to 1.16
	crypto/external/bsd/openssh/dist/auth2-pubkey.c up to 1.34
	crypto/external/bsd/openssh/dist/auth2.c        up to 1.29
	crypto/external/bsd/openssh/dist/authfd.c       up to 1.27
	crypto/external/bsd/openssh/dist/authfd.h       up to 1.17
	crypto/external/bsd/openssh/dist/authfile.c     up to 1.28
	crypto/external/bsd/openssh/dist/authfile.h     up to 1.10
	crypto/external/bsd/openssh/dist/canohost.c     up to 1.16
	crypto/external/bsd/openssh/dist/chacha.c       up to 1.6
	crypto/external/bsd/openssh/dist/chacha.h       up to 1.3
	crypto/external/bsd/openssh/dist/channels.c     up to 1.42
	crypto/external/bsd/openssh/dist/channels.h     up to 1.26
	crypto/external/bsd/openssh/dist/cipher-chachapoly.c up to 1.7
	crypto/external/bsd/openssh/dist/cipher-chachapoly.h up to 1.3
	crypto/external/bsd/openssh/dist/cipher.c       up to 1.21
	crypto/external/bsd/openssh/dist/cipher.h       up to 1.17
	crypto/external/bsd/openssh/dist/clientloop.c   up to 1.39
	crypto/external/bsd/openssh/dist/clientloop.h   up to 1.18
	crypto/external/bsd/openssh/dist/compat.c       up to 1.26
	crypto/external/bsd/openssh/dist/compat.h       up to 1.18
	crypto/external/bsd/openssh/dist/crypto_api.h   up to 1.5
	crypto/external/bsd/openssh/dist/dh.c           up to 1.20
	crypto/external/bsd/openssh/dist/dh.h           up to 1.13
	crypto/external/bsd/openssh/dist/digest-libc.c  up to 1.8
	crypto/external/bsd/openssh/dist/digest-openssl.c up to 1.9
	crypto/external/bsd/openssh/dist/dispatch.c     up to 1.11
	crypto/external/bsd/openssh/dist/dns.c          up to 1.23
	crypto/external/bsd/openssh/dist/dns.h          up to 1.13
	crypto/external/bsd/openssh/dist/ed25519.c      up to 1.6
	crypto/external/bsd/openssh/dist/fatal.c        up to 1.7
	crypto/external/bsd/openssh/dist/getrrsetbyname.c up to 1.6
	crypto/external/bsd/openssh/dist/gss-genr.c     up to 1.11
	crypto/external/bsd/openssh/dist/gss-serv.c     up to 1.15
	crypto/external/bsd/openssh/dist/hash.c         up to 1.7
	crypto/external/bsd/openssh/dist/hmac.c         up to 1.8
	crypto/external/bsd/openssh/dist/hostfile.c     up to 1.23
	crypto/external/bsd/openssh/dist/hostfile.h     up to 1.11
	crypto/external/bsd/openssh/dist/includes.h     up to 1.9
	crypto/external/bsd/openssh/dist/kex.c          up to 1.34
	crypto/external/bsd/openssh/dist/kex.h          up to 1.24
	crypto/external/bsd/openssh/dist/kexdh.c        up to 1.10
	crypto/external/bsd/openssh/dist/kexgen.c       up to 1.7
	crypto/external/bsd/openssh/dist/kexgexc.c      up to 1.17
	crypto/external/bsd/openssh/dist/kexgexs.c      up to 1.23
	crypto/external/bsd/openssh/dist/krl.c          up to 1.23
	crypto/external/bsd/openssh/dist/krl.h          up to 1.6
	crypto/external/bsd/openssh/dist/ldapauth.c     up to 1.8
	crypto/external/bsd/openssh/dist/ldapauth.h     up to 1.6
	crypto/external/bsd/openssh/dist/log.c          up to 1.27
	crypto/external/bsd/openssh/dist/log.h          up to 1.17
	crypto/external/bsd/openssh/dist/mac.c          up to 1.16
	crypto/external/bsd/openssh/dist/match.c        up to 1.16
	crypto/external/bsd/openssh/dist/match.h        up to 1.11
	crypto/external/bsd/openssh/dist/misc.c         up to 1.35
	crypto/external/bsd/openssh/dist/misc.h         up to 1.27
	crypto/external/bsd/openssh/dist/moduli         up to 1.10
	crypto/external/bsd/openssh/dist/moduli.c       up to 1.17
	crypto/external/bsd/openssh/dist/monitor.c      up to 1.43
	crypto/external/bsd/openssh/dist/monitor.h      up to 1.13
	crypto/external/bsd/openssh/dist/monitor_fdpass.c up to 1.9
	crypto/external/bsd/openssh/dist/monitor_wrap.c up to 1.34
	crypto/external/bsd/openssh/dist/monitor_wrap.h up to 1.23
	crypto/external/bsd/openssh/dist/msg.c          up to 1.11
	crypto/external/bsd/openssh/dist/mux.c          up to 1.35
	crypto/external/bsd/openssh/dist/myproposal.h   up to 1.24
	crypto/external/bsd/openssh/dist/namespace.h    up to 1.10
	crypto/external/bsd/openssh/dist/nchan.c        up to 1.14
	crypto/external/bsd/openssh/dist/packet.c       up to 1.50
	crypto/external/bsd/openssh/dist/packet.h       up to 1.26
	crypto/external/bsd/openssh/dist/pathnames.h    up to 1.15
	crypto/external/bsd/openssh/dist/pfilter.c      up to 1.8 (+patch)
	crypto/external/bsd/openssh/dist/poly1305.c     up to 1.6
	crypto/external/bsd/openssh/dist/progressmeter.c up to 1.15
	crypto/external/bsd/openssh/dist/readconf.c     up to 1.44
	crypto/external/bsd/openssh/dist/readconf.h     up to 1.34
	crypto/external/bsd/openssh/dist/readpass.c     up to 1.18
	crypto/external/bsd/openssh/dist/rijndael.h     up to 1.3
	crypto/external/bsd/openssh/dist/sandbox-pledge.c up to 1.3
	crypto/external/bsd/openssh/dist/sandbox-rlimit.c up to 1.7
	crypto/external/bsd/openssh/dist/scp.1          up to 1.31
	crypto/external/bsd/openssh/dist/scp.c          up to 1.41
	crypto/external/bsd/openssh/dist/servconf.c     up to 1.44
	crypto/external/bsd/openssh/dist/servconf.h     up to 1.30
	crypto/external/bsd/openssh/dist/serverloop.c   up to 1.35
	crypto/external/bsd/openssh/dist/session.c      up to 1.38
	crypto/external/bsd/openssh/dist/session.h      up to 1.10
	crypto/external/bsd/openssh/dist/sftp-client.c  up to 1.35
	crypto/external/bsd/openssh/dist/sftp-client.h  up to 1.18
	crypto/external/bsd/openssh/dist/sftp-common.c  up to 1.14
	crypto/external/bsd/openssh/dist/sftp-common.h  up to 1.8
	crypto/external/bsd/openssh/dist/sftp-glob.c    up to 1.15
	crypto/external/bsd/openssh/dist/sftp-server-main.c up to 1.8
	crypto/external/bsd/openssh/dist/sftp-server.8  up to 1.14
	crypto/external/bsd/openssh/dist/sftp-server.c  up to 1.30
	crypto/external/bsd/openssh/dist/sftp.1         up to 1.30
	crypto/external/bsd/openssh/dist/sftp.c         up to 1.39
	crypto/external/bsd/openssh/dist/ssh-add.1      up to 1.18
	crypto/external/bsd/openssh/dist/ssh-add.c      up to 1.30
	crypto/external/bsd/openssh/dist/ssh-agent.1    up to 1.19
	crypto/external/bsd/openssh/dist/ssh-agent.c    up to 1.37
	crypto/external/bsd/openssh/dist/ssh-dss.c      up to 1.18
	crypto/external/bsd/openssh/dist/ssh-ecdsa.c    up to 1.15
	crypto/external/bsd/openssh/dist/ssh-ed25519.c  up to 1.10
	crypto/external/bsd/openssh/dist/ssh-gss.h      up to 1.10
	crypto/external/bsd/openssh/dist/ssh-keygen.1   up to 1.34
	crypto/external/bsd/openssh/dist/ssh-keygen.c   up to 1.46
	crypto/external/bsd/openssh/dist/ssh-keyscan.1  up to 1.18
	crypto/external/bsd/openssh/dist/ssh-keyscan.c  up to 1.32
	crypto/external/bsd/openssh/dist/ssh-keysign.8  up to 1.14
	crypto/external/bsd/openssh/dist/ssh-keysign.c  up to 1.24
	crypto/external/bsd/openssh/dist/ssh-pkcs11-client.c up to 1.19
	crypto/external/bsd/openssh/dist/ssh-pkcs11-helper.8 up to 1.12
	crypto/external/bsd/openssh/dist/ssh-pkcs11-helper.c up to 1.22
	crypto/external/bsd/openssh/dist/ssh-pkcs11.c   up to 1.26
	crypto/external/bsd/openssh/dist/ssh-pkcs11.h   up to 1.9
	crypto/external/bsd/openssh/dist/ssh-rsa.c      up to 1.19
	crypto/external/bsd/openssh/dist/ssh-xmss.c     up to 1.6
	crypto/external/bsd/openssh/dist/ssh.1          up to 1.39
	crypto/external/bsd/openssh/dist/ssh.c          up to 1.45
	crypto/external/bsd/openssh/dist/ssh.h          up to 1.13
	crypto/external/bsd/openssh/dist/ssh2.h         up to 1.15
	crypto/external/bsd/openssh/dist/ssh_api.c      up to 1.15
	crypto/external/bsd/openssh/dist/ssh_config     up to 1.16
	crypto/external/bsd/openssh/dist/ssh_config.5   up to 1.40
	crypto/external/bsd/openssh/dist/sshbuf-getput-basic.c up to 1.12
	crypto/external/bsd/openssh/dist/sshbuf-getput-crypto.c up to 1.11
	crypto/external/bsd/openssh/dist/sshbuf-misc.c  up to 1.14
	crypto/external/bsd/openssh/dist/sshbuf.c       up to 1.14
	crypto/external/bsd/openssh/dist/sshbuf.h       up to 1.19
	crypto/external/bsd/openssh/dist/sshconnect.c   up to 1.37
	crypto/external/bsd/openssh/dist/sshconnect.h   up to 1.17
	crypto/external/bsd/openssh/dist/sshconnect2.c  up to 1.46
	crypto/external/bsd/openssh/dist/sshd.8         up to 1.31
	crypto/external/bsd/openssh/dist/sshd.c         up to 1.50
	crypto/external/bsd/openssh/dist/sshd_config    up to 1.28
	crypto/external/bsd/openssh/dist/sshd_config.5  up to 1.42
	crypto/external/bsd/openssh/dist/ssherr.c       up to 1.10
	crypto/external/bsd/openssh/dist/ssherr.h       up to 1.4
	crypto/external/bsd/openssh/dist/sshkey-xmss.c  up to 1.10
	crypto/external/bsd/openssh/dist/sshkey-xmss.h  up to 1.5
	crypto/external/bsd/openssh/dist/sshkey.c       up to 1.32
	crypto/external/bsd/openssh/dist/sshkey.h       up to 1.19
	crypto/external/bsd/openssh/dist/sshlogin.c     up to 1.13
	crypto/external/bsd/openssh/dist/sshpty.c       up to 1.8
	crypto/external/bsd/openssh/dist/ttymodes.c     up to 1.12
	crypto/external/bsd/openssh/dist/uidswap.c      up to 1.10
	crypto/external/bsd/openssh/dist/umac.c         up to 1.22
	crypto/external/bsd/openssh/dist/umac.h         up to 1.10
	crypto/external/bsd/openssh/dist/utf8.c         up to 1.9
	crypto/external/bsd/openssh/dist/utf8.h         up to 1.5
	crypto/external/bsd/openssh/dist/version.h      up to 1.44
	crypto/external/bsd/openssh/dist/xmalloc.c      up to 1.13
	crypto/external/bsd/openssh/dist/xmalloc.h      up to 1.16
	crypto/external/bsd/openssh/dist/xmss_hash.c    up to 1.3
	crypto/external/bsd/openssh/dist/moduli-gen/Makefile up to 1.3
	crypto/external/bsd/openssh/dist/moduli-gen/moduli-gen.sh up to 1.1.1.3
	crypto/external/bsd/openssh/dist/moduli-gen/moduli.2048 up to 1.16
	crypto/external/bsd/openssh/dist/moduli-gen/moduli.3072 up to 1.18
	crypto/external/bsd/openssh/dist/moduli-gen/moduli.4096 up to 1.18
	crypto/external/bsd/openssh/dist/moduli-gen/moduli.6144 up to 1.18
	crypto/external/bsd/openssh/dist/moduli-gen/moduli.7680 up to 1.18
	crypto/external/bsd/openssh/dist/moduli-gen/moduli.8192 up to 1.18
	crypto/external/bsd/openssh/lib/Makefile        up to 1.38
	crypto/external/bsd/openssh/lib/shlib_version   up to 1.36
	crypto/external/bsd/openssh/openssh2netbsd      up to 1.4
	lib/libpam/modules/pam_ssh/Makefile             up to 1.13
	lib/libpam/modules/pam_ssh/pam_ssh.c            up to 1.30
	distrib/sets/lists/base/shl.mi			(apply patch)
	distrib/sets/lists/debug/shl.mi			(apply patch)
	doc/3RDPARTY					(apply patch)

Update OpenSSH to 9.6.

Revision 1.1.1.5.4.1, Wed Feb 23 19:04:27 2022 UTC (2 years, 1 month ago) by martin
Branch: netbsd-9
Changes since 1.1.1.5: +0 -111 lines
FILE REMOVED

file sshsig.h was added on branch netbsd-9 on 2023-12-25 12:31:10 +0000

Revision 1.1.1.5 / (download) - annotate - [selected] (vendor branch), Wed Feb 23 19:04:27 2022 UTC (2 years, 1 month ago) by christos
Branch: OPENSSH, MAIN
CVS Tags: v96-20231218, v95-20231004, v93p2-20230719, v93-20230719, v91-20221004, v90-20220408, v89-20220223, netbsd-10-base, netbsd-10-0-RC6, netbsd-10-0-RC5, netbsd-10-0-RC4, netbsd-10-0-RC3, netbsd-10-0-RC2, netbsd-10-0-RC1, netbsd-10, HEAD
Branch point for: netbsd-9
Changes since 1.1.1.4: +5 -1 lines
Diff to previous 1.1.1.4 (colored)

Import OpenSSH 8.9.

Future deprecation notice
=========================

A near-future release of OpenSSH will switch scp(1) from using the
legacy scp/rcp protocol to using SFTP by default.

Legacy scp/rcp performs wildcard expansion of remote filenames (e.g.
"scp host:* .") through the remote shell. This has the side effect of
requiring double quoting of shell meta-characters in file names
included on scp(1) command-lines, otherwise they could be interpreted
as shell commands on the remote side.

This creates one area of potential incompatibility: scp(1) when using
the SFTP protocol no longer requires this finicky and brittle quoting,
and attempts to use it may cause transfers to fail. We consider the
removal of the need for double-quoting shell characters in file names
to be a benefit and do not intend to introduce bug-compatibility for
legacy scp/rcp in scp(1) when using the SFTP protocol.

Another area of potential incompatibility relates to the use of remote
paths relative to other user's home directories, for example -
"scp host:~user/file /tmp". The SFTP protocol has no native way to
expand a ~user path. However, sftp-server(8) in OpenSSH 8.7 and later
support a protocol extension "expand-path@openssh.com" to support
this.

Security Near Miss
==================

 * sshd(8): fix an integer overflow in the user authentication path
   that, in conjunction with other logic errors, could have yielded
   unauthenticated access under difficult to exploit conditions.

   This situation is not exploitable because of independent checks in
   the privilege separation monitor. Privilege separation has been
   enabled by default in since openssh-3.2.2 (released in 2002) and
   has been mandatory since openssh-7.5 (released in 2017). Moreover,
   portable OpenSSH has used toolchain features available in most
   modern compilers to abort on signed integer overflow since
   openssh-6.5 (released in 2014).

   Thanks to Malcolm Stagg for finding and reporting this bug.

Potentially-incompatible changes
================================

 * sshd(8), portable OpenSSH only: this release removes in-built
   support for MD5-hashed passwords. If you require these on your
   system then we recommend linking against libxcrypt or similar.

 * This release modifies the FIDO security key middleware interface
   and increments SSH_SK_VERSION_MAJOR.

Changes since OpenSSH 8.8
=========================

This release includes a number of new features.

New features
------------

 * ssh(1), sshd(8), ssh-add(1), ssh-agent(1): add a system for
   restricting forwarding and use of keys added to ssh-agent(1)
   A detailed description of the feature is available at
   https://www.openssh.com/agent-restrict.html and the protocol
   extensions are documented in the PROTOCOL and PROTOCOL.agent
   files in the source release.

 * ssh(1), sshd(8): add the sntrup761x25519-sha512@openssh.com hybrid
   ECDH/x25519 + Streamlined NTRU Prime post-quantum KEX to the
   default KEXAlgorithms list (after the ECDH methods but before the
   prime-group DH ones). The next release of OpenSSH is likely to
   make this key exchange the default method.

 * ssh-keygen(1): when downloading resident keys from a FIDO token,
   pass back the user ID that was used when the key was created and
   append it to the filename the key is written to (if it is not the
   default). Avoids keys being clobbered if the user created multiple
   resident keys with the same application string but different user
   IDs.

 * ssh-keygen(1), ssh(1), ssh-agent(1): better handling for FIDO keys
   on tokens that provide user verification (UV) on the device itself,
   including biometric keys, avoiding unnecessary PIN prompts.

 * ssh-keygen(1): add "ssh-keygen -Y match-principals" operation to
   perform matching of principals names against an allowed signers
   file. To be used towards a TOFU model for SSH signatures in git.

 * ssh-add(1), ssh-agent(1): allow pin-required FIDO keys to be added
   to ssh-agent(1). $SSH_ASKPASS will be used to request the PIN at
   authentication time.

 * ssh-keygen(1): allow selection of hash at sshsig signing time
   (either sha512 (default) or sha256).

 * ssh(1), sshd(8): read network data directly to the packet input
   buffer instead indirectly via a small stack buffer. Provides a
   modest performance improvement.

 * ssh(1), sshd(8): read data directly to the channel input buffer,
   providing a similar modest performance improvement.

 * ssh(1): extend the PubkeyAuthentication configuration directive to
   accept yes|no|unbound|host-bound to allow control over one of the
   protocol extensions used to implement agent-restricted keys.

Bugfixes
--------

 * sshd(8): document that CASignatureAlgorithms, ExposeAuthInfo and
   PubkeyAuthOptions can be used in a Match block. PR#277.

 * sshd(8): fix possible string truncation when constructing paths to
   .rhosts/.shosts files with very long user home directory names.

 * ssh-keysign(1): unbreak for KEX algorithms that use SHA384/512
   exchange hashes

 * ssh(1): don't put the TTY into raw mode when SessionType=none,
   avoids ^C being unable to kill such a session. bz3360

 * scp(1): fix some corner-case bugs in SFTP-mode handling of
   ~-prefixed paths.

 * ssh(1): unbreak hostbased auth using RSA keys. Allow ssh(1) to
   select RSA keys when only RSA/SHA2 signature algorithms are
   configured (this is the default case). Previously RSA keys were
   not being considered in the default case.

 * ssh-keysign(1): make ssh-keysign use the requested signature
   algorithm and not the default for the key type. Part of unbreaking
   hostbased auth for RSA/SHA2 keys.

 * ssh(1): stricter UpdateHostkey signature verification logic on
   the client- side. Require RSA/SHA2 signatures for RSA hostkeys
   except when RSA/SHA1 was explicitly negotiated during initial
   KEX; bz3375

 * ssh(1), sshd(8): fix signature algorithm selection logic for
   UpdateHostkeys on the server side. The previous code tried to
   prefer RSA/SHA2 for hostkey proofs of RSA keys, but missed some
   cases. This will use RSA/SHA2 signatures for RSA keys if the
   client proposed these algorithms in initial KEX. bz3375

 * All: convert all uses of select(2)/pselect(2) to poll(2)/ppoll(2).
   This includes the mainloops in ssh(1), ssh-agent(1), ssh-agent(1)
   and sftp-server(8), as well as the sshd(8) listen loop and all
   other FD read/writability checks. On platforms with missing or
   broken poll(2)/ppoll(2) syscalls a select(2)-based compat shim is
   available.

 * ssh-keygen(1): the "-Y find-principals" command was verifying key
   validity when using ca certs but not with simple key lifetimes
   within the allowed signers file.

 * ssh-keygen(1): make sshsig verify-time argument parsing optional

 * sshd(8): fix truncation in rhosts/shosts path construction.

 * ssh(1), ssh-agent(1): avoid xmalloc(0) for PKCS#11 keyid for ECDSA
   keys (we already did this for RSA keys). Avoids fatal errors for
   PKCS#11 libraries that return empty keyid, e.g. Microchip ATECC608B
   "cryptoauthlib"; bz#3364

 * ssh(1), ssh-agent(1): improve the testing of credentials against
   inserted FIDO: ask the token whether a particular key belongs to
   it in cases where the token supports on-token user-verification
   (e.g. biometrics) rather than just assuming that it will accept it.

   Will reduce spurious "Confirm user presence" notifications for key
   handles that relate to FIDO keys that are not currently inserted in at
   least some cases. bz3366

 * ssh(1), sshd(8): correct value for IPTOS_DSCP_LE. It needs to
   allow for the preceding two ECN bits. bz#3373

 * ssh-keygen(1): add missing -O option to usage() for the "-Y sign"
   option.

 * ssh-keygen(1): fix a NULL deref when using the find-principals
   function, when matching an allowed_signers line that contains a
   namespace restriction, but no restriction specified on the
   command-line

 * ssh-agent(1): fix memleak in process_extension(); oss-fuzz
   issue #42719

 * ssh(1): suppress "Connection to xxx closed" messages when LogLevel
   is set to "error" or above. bz3378

 * ssh(1), sshd(8): use correct zlib flags when inflate(3)-ing
   compressed packet data. bz3372

 * scp(1): when recursively transferring files in SFTP mode, create the
   destination directory if it doesn't already exist to match scp(1) in
   legacy RCP mode behaviour.

 * scp(1): many improvements in error message consistency between scp(1)
   in SFTP mode vs legacy RCP mode.

 * sshd(8): fix potential race in SIGTERM handling PR#289

 * ssh(1), ssh(8): since DSA keys are deprecated, move them to the
   end of the default list of public keys so that they will be tried
   last. PR#295

 * ssh-keygen(1): allow 'ssh-keygen -Y find-principals' to match
   wildcard principals in allowed_signers files

Portability
-----------

 * ssh(1), sshd(8): don't trust closefrom(2) on Linux. glibc's
   implementation does not work in a chroot when the kernel does not
   have close_range(2). It tries to read from /proc/self/fd and when
   that fails dies with an assertion of sorts. Instead, call
   close_range(2) directly from our compat code and fall back if
   that fails.  bz#3349,

 * OS X poll(2) is broken; use compat replacement. For character-
   special devices like /dev/null, Darwin's poll(2) returns POLLNVAL
   when polled with POLLIN. Apparently this is Apple bug 3710161 -
   not public but a websearch will find other OSS projects
   rediscovering it periodically since it was first identified in
   2005.

 * Correct handling of exceptfds/POLLPRI in our select(2)-based
   poll(2)/ppoll(2) compat implementation.

 * Cygwin: correct checking of mbstowcs() return value.

 * Add a basic SECURITY.md that refers people to the openssh.com
   website.

 * Enable additional compiler warnings and toolchain hardening flags,
   including -Wbitwise-instead-of-logical, -Wmisleading-indentation,
   -fzero-call-used-regs and -ftrivial-auto-var-init.

 * HP/UX. Use compat getline(3) on HP-UX 10.x, where the libc version
   is not reliable.

Revision 1.1.1.4 / (download) - annotate - [select for diffs] (vendor branch), Thu Sep 2 11:22:30 2021 UTC (2 years, 6 months ago) by christos
Branch: OPENSSH, MAIN
CVS Tags: v88-20210926, v87-20210820
Changes since 1.1.1.3: +3 -3 lines
Diff to previous 1.1.1.3 (colored) to selected 1.1.1.5 (colored)

Import OpenSSH-8.7:

Imminent deprecation notice
===========================

OpenSSH will disable the ssh-rsa signature scheme by default in the
next release.

In the SSH protocol, the "ssh-rsa" signature scheme uses the SHA-1
hash algorithm in conjunction with the RSA public key algorithm.
It is now possible[1] to perform chosen-prefix attacks against the
SHA-1 algorithm for less than USD$50K.

Note that the deactivation of "ssh-rsa" signatures does not necessarily
require cessation of use for RSA keys. In the SSH protocol, keys may be
capable of signing using multiple algorithms. In particular, "ssh-rsa"
keys are capable of signing using "rsa-sha2-256" (RSA/SHA256),
"rsa-sha2-512" (RSA/SHA512) and "ssh-rsa" (RSA/SHA1). Only the last of
these is being turned off by default.

This algorithm is unfortunately still used widely despite the
existence of better alternatives, being the only remaining public key
signature algorithm specified by the original SSH RFCs that is still
enabled by default.

The better alternatives include:

 * The RFC8332 RSA SHA-2 signature algorithms rsa-sha2-256/512. These
   algorithms have the advantage of using the same key type as
   "ssh-rsa" but use the safe SHA-2 hash algorithms. These have been
   supported since OpenSSH 7.2 and are already used by default if the
   client and server support them.

 * The RFC8709 ssh-ed25519 signature algorithm. It has been supported
   in OpenSSH since release 6.5.

 * The RFC5656 ECDSA algorithms: ecdsa-sha2-nistp256/384/521. These
   have been supported by OpenSSH since release 5.7.

To check whether a server is using the weak ssh-rsa public key
algorithm, for host authentication, try to connect to it after
removing the ssh-rsa algorithm from ssh(1)'s allowed list:

    ssh -oHostKeyAlgorithms=-ssh-rsa user@host

If the host key verification fails and no other supported host key
types are available, the server software on that host should be
upgraded.

OpenSSH recently enabled the UpdateHostKeys option by default to
assist the client by automatically migrating to better algorithms.

[1] "SHA-1 is a Shambles: First Chosen-Prefix Collision on SHA-1 and
    Application to the PGP Web of Trust" Leurent, G and Peyrin, T
    (2020) https://eprint.iacr.org/2020/014.pdf

Potentially-incompatible changes
================================

This release includes a number of changes that may affect existing
configurations:

 * scp(1): this release changes the behaviour of remote to remote
   copies (e.g. "scp host-a:/path host-b:") to transfer through the
   local host by default. This was previously available via the -3
   flag. This mode avoids the need to expose credentials on the
   origin hop, avoids triplicate interpretation of filenames by the
   shell (by the local system, the copy origin and the destination)
   and, in conjunction with the SFTP support for scp(1) mentioned
   below, allows use of all authentication methods to the remote
   hosts (previously, only non-interactive methods could be used).
   A -R flag has been added to select the old behaviour.

 * ssh(1)/sshd(8): both the client and server are now using a
   stricter configuration file parser. The new parser uses more
   shell-like rules for quotes, space and escape characters. It is
   also more strict in rejecting configurations that include options
   lacking arguments. Previously some options (e.g. DenyUsers) could
   appear on a line with no subsequent arguments. This release will
   reject such configurations. The new parser will also reject
   configurations with unterminated quotes and multiple '='
   characters after the option name.

 * ssh(1): when using SSHFP DNS records for host key verification,
   ssh(1) will verify all matching records instead of just those
   with the specific signature type requested. This may cause host
   key verification problems if stale SSHFP records of a different
   or legacy signature type exist alongside other records for a
   particular host. bz#3322

 * ssh-keygen(1): when generating a FIDO key and specifying an
   explicit attestation challenge (using -Ochallenge), the challenge
   will now be hashed by the builtin security key middleware. This
   removes the (undocumented) requirement that challenges be exactly
   32 bytes in length and matches the expectations of libfido2.

 * sshd(8): environment="..." directives in authorized_keys files are
   now first-match-wins and limited to 1024 discrete environment
   variable names.

Changes since OpenSSH 8.6
=========================

This release contains a mix of new features and bug-fixes.

New features
------------

 - scp(1): experimental support for transfers using the SFTP protocol
   as a replacement for the venerable SCP/RCP protocol that it has
   traditionally used. SFTP offers more predictable filename handling
   and does not require expansion of glob(3) patterns via the shell
   on the remote side.

   SFTP support may be enabled via a temporary scp -s flag. It is
   intended for SFTP to become the default transfer mode in the
   near future, at which time the -s flag will be removed. The -O
   flag exists to force use of the original SCP/RCP protocol for
   cases where SFTP may be unavailable or incompatible.

 - sftp-server(8): add a protocol extension to support expansion of
   ~/ and ~user/ prefixed paths. This was added to support these
   paths when used by scp(1) while in SFTP mode.

 - ssh(1): add a ForkAfterAuthentication ssh_config(5) counterpart to
   the ssh(1) -f flag. GHPR#231

 - ssh(1): add a StdinNull directive to ssh_config(5) that allows the
   config file to do the same thing as -n does on the ssh(1) command-
   line. GHPR#231

 - ssh(1): add a SessionType directive to ssh_config, allowing the
    configuration file to offer equivalent control to the -N (no
    session) and -s (subsystem) command-line flags. GHPR#231

 - ssh-keygen(1): allowed signers files used by ssh-keygen(1)
   signatures now support listing key validity intervals alongside
   they key, and ssh-keygen(1) can optionally check during signature
   verification whether a specified time falls inside this interval.
   This feature is intended for use by git to support signing and
   verifying objects using ssh keys.

 - ssh-keygen(8): support printing of the full public key in a sshsig
   signature via a -Oprint-pubkey flag.

Bugfixes
--------

 * ssh(1)/sshd(8): start time-based re-keying exactly on schedule in
   the client and server mainloops. Previously the re-key timeout
   could expire but re-keying would not start until a packet was sent
   or received, causing a spin in select() if the connection was
   quiescent.

 * ssh-keygen(1): avoid Y2038 problem in printing certificate
   validity lifetimes. Dates past 2^31-1 seconds since epoch were
   displayed incorrectly on some platforms. bz#3329

 * scp(1): allow spaces to appear in usernames for local to remote
   and scp -3 remote to remote copies. bz#1164

 * ssh(1)/sshd(8): remove references to ChallengeResponseAuthentication
   in favour of KbdInteractiveAuthentication. The former is what was in
   SSHv1, the latter is what is in SSHv2 (RFC4256) and they were
   treated as somewhat but not entirely equivalent. We retain the old
   name as a deprecated alias so configuration files continue to work
   as well as a reference in the man page for people looking for it.
   bz#3303

 * ssh(1)/ssh-add(1)/ssh-keygen(1): fix decoding of X.509 subject name
   when extracting a key from a PKCS#11 certificate. bz#3327

 * ssh(1): restore blocking status on stdio fds before close. ssh(1)
   needs file descriptors in non-blocking mode to operate but it was
   not restoring the original state on exit. This could cause
   problems with fds shared with other programs via the shell,
   bz#3280 and GHPR#246

 * ssh(1)/sshd(8): switch both client and server mainloops from
   select(3) to pselect(3). Avoids race conditions where a signal
   may arrive immediately before select(3) and not be processed until
   an event fires. bz#2158

 * ssh(1): sessions started with ControlPersist were incorrectly
   executing a shell when the -N (no shell) option was specified.
   bz#3290

 * ssh(1): check if IPQoS or TunnelDevice are already set before
   overriding. Prevents values in config files from overriding values
   supplied on the command line. bz#3319

 * ssh(1): fix debug message when finding a private key to match a
   certificate being attempted for user authentication. Previously it
   would print the certificate's path, whereas it was supposed to be
   showing the private key's path. GHPR#247

 * sshd(8): match host certificates against host public keys, not
   private keys. Allows use of certificates with private keys held in
   a ssh-agent.  bz#3524

 * ssh(1): add a workaround for a bug in OpenSSH 7.4 sshd(8), which
   allows RSA/SHA2 signatures for public key authentication but fails
   to advertise this correctly via SSH2_MSG_EXT_INFO. This causes
   clients of these server to incorrectly match
   PubkeyAcceptedAlgorithmse and potentially refuse to offer valid
   keys. bz#3213

 * sftp(1)/scp(1): degrade gracefully if a sftp-server offers the
   limits@openssh.com extension but fails when the client tries to
   invoke it. bz#3318

 * ssh(1): allow ssh_config SetEnv to override $TERM, which is
   otherwise handled specially by the protocol. Useful in ~/.ssh/config
   to set TERM to something generic (e.g. "xterm" instead of
   "xterm-256color") for destinations that lack terminfo entries.

 * sftp-server(8): the limits@openssh.com extension was incorrectly
   marked as an operation that writes to the filesystem, which made it
   unavailable in sftp-server read-only mode. bz#3318

 * ssh(1): fix SEGV in UpdateHostkeys debug() message, triggered when
   the update removed more host keys than remain present.

 * many manual page fixes.

Portability
-----------

 * ssh(1): move closefrom() to before first malloc. When built against
   tcmalloc, the closefrom() would stomp on file descriptors created
   for tcmalloc's internal use. bz#3321

 * sshd(8): handle GIDs > 2^31 in getgrouplist. When compiled in 32bit
   mode, the getgrouplist implementation may fail for GIDs greater than
   LONG_MAX.

 * ssh(1): xstrdup environment variable used by ForwardAgent. bz#3328

 * sshd(8): don't sigdie() in signal handler in privsep child process;
   this can end up causing sandbox violations per bz3286

Revision 1.1.1.3 / (download) - annotate - [select for diffs] (vendor branch), Fri Dec 4 18:40:07 2020 UTC (3 years, 3 months ago) by christos
Branch: OPENSSH, MAIN
CVS Tags: v86-20210419, v85_20210303, v84-20200927, cjep_sun2x-base1, cjep_sun2x-base, cjep_sun2x, cjep_staticlib_x-base1, cjep_staticlib_x-base, cjep_staticlib_x
Changes since 1.1.1.2: +6 -3 lines
Diff to previous 1.1.1.2 (colored) to selected 1.1.1.5 (colored)

OpenSSH 8.4 was released on 2020-09-27. It is available from the
mirrors listed at https://www.openssh.com/.

OpenSSH is a 100% complete SSH protocol 2.0 implementation and
includes sftp client and server support.

Once again, we would like to thank the OpenSSH community for their
continued support of the project, especially those who contributed
code or patches, reported bugs, tested snapshots or donated to the
project. More information on donations may be found at:
https://www.openssh.com/donations.html

Future deprecation notice
=========================

It is now possible[1] to perform chosen-prefix attacks against the
SHA-1 algorithm for less than USD$50K. For this reason, we will be
disabling the "ssh-rsa" public key signature algorithm by default in a
near-future release.

This algorithm is unfortunately still used widely despite the
existence of better alternatives, being the only remaining public key
signature algorithm specified by the original SSH RFCs.

The better alternatives include:

 * The RFC8332 RSA SHA-2 signature algorithms rsa-sha2-256/512. These
   algorithms have the advantage of using the same key type as
   "ssh-rsa" but use the safe SHA-2 hash algorithms. These have been
   supported since OpenSSH 7.2 and are already used by default if the
   client and server support them.

 * The ssh-ed25519 signature algorithm. It has been supported in
   OpenSSH since release 6.5.

 * The RFC5656 ECDSA algorithms: ecdsa-sha2-nistp256/384/521. These
   have been supported by OpenSSH since release 5.7.

To check whether a server is using the weak ssh-rsa public key
algorithm, for host authentication, try to connect to it after
removing the ssh-rsa algorithm from ssh(1)'s allowed list:

    ssh -oHostKeyAlgorithms=-ssh-rsa user@host

If the host key verification fails and no other supported host key
types are available, the server software on that host should be
upgraded.

We intend to enable UpdateHostKeys by default in the next OpenSSH
release. This will assist the client by automatically migrating to
better algorithms. Users may consider enabling this option manually.

[1] "SHA-1 is a Shambles: First Chosen-Prefix Collision on SHA-1 and
    Application to the PGP Web of Trust" Leurent, G and Peyrin, T
    (2020) https://eprint.iacr.org/2020/014.pdf

Security
========

 * ssh-agent(1): restrict ssh-agent from signing web challenges for
   FIDO/U2F keys.

   When signing messages in ssh-agent using a FIDO key that has an
   application string that does not start with "ssh:", ensure that the
   message being signed is one of the forms expected for the SSH protocol
   (currently public key authentication and sshsig signatures).

   This prevents ssh-agent forwarding on a host that has FIDO keys
   attached granting the ability for the remote side to sign challenges
   for web authentication using those keys too.

   Note that the converse case of web browsers signing SSH challenges is
   already precluded because no web RP can have the "ssh:" prefix in the
   application string that we require.

 * ssh-keygen(1): Enable FIDO 2.1 credProtect extension when generating
   a FIDO resident key.

   The recent FIDO 2.1 Client to Authenticator Protocol introduced a
   "credProtect" feature to better protect resident keys. We use this
   option to require a PIN prior to all operations that may retrieve
   a resident key from a FIDO token.

Potentially-incompatible changes
================================

This release includes a number of changes that may affect existing
configurations:

 * For FIDO/U2F support, OpenSSH recommends the use of libfido2 1.5.0
   or greater. Older libraries have limited support at the expense of
   disabling particular features. These include resident keys, PIN-
   required keys and multiple attached tokens.

 * ssh-keygen(1): the format of the attestation information optionally
   recorded when a FIDO key is generated has changed. It now includes
   the authenticator data needed to validate attestation signatures.

 * The API between OpenSSH and the FIDO token middleware has changed
   and the SSH_SK_VERSION_MAJOR version has been incremented as a
   result. Third-party middleware libraries must support the current
   API version (7) to work with OpenSSH 8.4.

 * The portable OpenSSH distribution now requires automake to rebuild
   the configure script and supporting files. This is not required when
   simply building portable OpenSSH from a release tar file.

Changes since OpenSSH 8.3
=========================

New features
------------

 * ssh(1), ssh-keygen(1): support for FIDO keys that require a PIN for
   each use. These keys may be generated using ssh-keygen using a new
   "verify-required" option. When a PIN-required key is used, the user
   will be prompted for a PIN to complete the signature operation.

 * sshd(8): authorized_keys now supports a new "verify-required"
   option to require FIDO signatures assert that the token verified
   that the user was present before making the signature. The FIDO
   protocol supports multiple methods for user-verification, but
   currently OpenSSH only supports PIN verification.

 * sshd(8), ssh-keygen(1): add support for verifying FIDO webauthn
   signatures. Webauthn is a standard for using FIDO keys in web
   browsers. These signatures are a slightly different format to plain
   FIDO signatures and thus require explicit support.

 * ssh(1): allow some keywords to expand shell-style ${ENV}
   environment variables. The supported keywords are CertificateFile,
   ControlPath, IdentityAgent and IdentityFile, plus LocalForward and
   RemoteForward when used for Unix domain socket paths. bz#3140

 * ssh(1), ssh-agent(1): allow some additional control over the use of
   ssh-askpass via a new $SSH_ASKPASS_REQUIRE environment variable,
   including forcibly enabling and disabling its use. bz#69

 * ssh(1): allow ssh_config(5)'s AddKeysToAgent keyword accept a time
   limit for keys in addition to its current flag options. Time-
   limited keys will automatically be removed from ssh-agent after
   their expiry time has passed.

 * scp(1), sftp(1): allow the -A flag to explicitly enable agent
   forwarding in scp and sftp. The default remains to not forward an
   agent, even when ssh_config enables it.

 * ssh(1): add a '%k' TOKEN that expands to the effective HostKey of
   the destination. This allows, e.g., keeping host keys in individual
   files using "UserKnownHostsFile ~/.ssh/known_hosts.d/%k". bz#1654

 * ssh(1): add %-TOKEN, environment variable and tilde expansion to
   the UserKnownHostsFile directive, allowing the path to be
   completed by the configuration (e.g. bz#1654)

 * ssh-keygen(1): allow "ssh-add -d -" to read keys to be deleted
   from stdin. bz#3180

 * sshd(8): improve logging for MaxStartups connection throttling.
   sshd will now log when it starts and stops throttling and periodically
   while in this state. bz#3055

Bugfixes
--------

 * ssh(1), ssh-keygen(1): better support for multiple attached FIDO
   tokens. In cases where OpenSSH cannot unambiguously determine which
   token to direct a request to, the user is now required to select a
   token by touching it. In cases of operations that require a PIN to
   be verified, this avoids sending the wrong PIN to the wrong token
   and incrementing the token's PIN failure counter (tokens
   effectively erase their keys after too many PIN failures).

 * sshd(8): fix Include before Match in sshd_config; bz#3122

 * ssh(1): close stdin/out/error when forking after authentication
   completes ("ssh -f ...") bz#3137

 * ssh(1), sshd(8): limit the amount of channel input data buffered,
   avoiding peers that advertise large windows but are slow to read
   from causing high memory consumption.

 * ssh-agent(1): handle multiple requests sent in a single write() to
   the agent.

 * sshd(8): allow sshd_config longer than 256k

 * sshd(8): avoid spurious "Unable to load host key" message when sshd
   load a private key but no public counterpart

 * ssh(1): prefer the default hostkey algorithm list whenever we have
   a hostkey that matches its best-preference algorithm.

 * sshd(1): when ordering the hostkey algorithms to request from a
   server, prefer certificate types if the known_hosts files contain a key
   marked as a @cert-authority; bz#3157

 * ssh(1): perform host key fingerprint comparisons for the "Are you
   sure you want to continue connecting (yes/no/[fingerprint])?"
   prompt with case sensitivity.

 * sshd(8): ensure that address/masklen mismatches in sshd_config
   yield fatal errors at daemon start time rather than later when
   they are evaluated.

 * ssh-keygen(1): ensure that certificate extensions are lexically
   sorted. Previously if the user specified a custom extension then
   the everything would be in order except the custom ones. bz#3198

 * ssh(1): also compare username when checking for JumpHost loops.
   bz#3057

 * ssh-keygen(1): preserve group/world read permission on known_hosts
   files across runs of "ssh-keygen -Rf /path". The old behaviour was
   to remove all rights for group/other. bz#3146

 * ssh-keygen(1): Mention the [-a rounds] flag in the ssh-keygen
   manual page and usage().

 * sshd(8): explicitly construct path to ~/.ssh/rc rather than
   relying on it being relative to the current directory, so that it
   can still be found if the shell startup changes its directory.
   bz#3185

 * sshd(8): when redirecting sshd's log output to a file, undo this
   redirection after the session child process is forked(). Fixes
   missing log messages when using this feature under some
   circumstances.

 * sshd(8): start ClientAliveInterval bookkeeping before first pass
   through select() loop; fixed theoretical case where busy sshd may
   ignore timeouts from client.

 * ssh(1): only reset the ServerAliveInterval check when we receive
   traffic from the server and ignore traffic from a port forwarding
   client, preventing a client from keeping a connection alive when
   it should be terminated. bz#2265

 * ssh-keygen(1): avoid spurious error message when ssh-keygen
   creates files outside ~/.ssh

 * sftp-client(1): fix off-by-one error that caused sftp downloads to
   make one more concurrent request that desired. This prevented using
   sftp(1) in unpipelined request/response mode, which is useful when
   debugging. bz#3054

 * ssh(1), sshd(8): handle EINTR in waitfd() and timeout_connect()
   helpers. bz#3071

 * ssh(1), ssh-keygen(1): defer creation of ~/.ssh until we attempt to
   write to it so we don't leave an empty .ssh directory when it's not
   needed. bz#3156

 * ssh(1), sshd(8): fix multiplier when parsing time specifications
   when handling seconds after other units. bz#3171

Portability
-----------

 * sshd(8): always send any PAM account messages. If the PAM account
   stack returns any messages, always send them to the user and not
   just if the check succeeds. bz#2049

 * Implement some backwards compatibility for libfido2 libraries
   older than 1.5.0. Note that use of an older library will result
   in the loss of certain features including resident key support,
   PIN support and support for multiple attached tokens.

 * configure fixes for XCode 12

 * gnome-ssh-askpass3: ensure the "close" button is not focused by
   default for SSH_ASKPASS_PROMPT=none prompts. Avoids space/enter
   accidentally dismissing FIDO touch notifications.

 * gnome-ssh-askpass3: allow some control over textarea colour via
   $GNOME_SSH_ASKPASS_FG_COLOR and $GNOME_SSH_ASKPASS_BG_COLOR
   environment variables.

 * sshd(8): document another PAM spec problem in a frustrated comment

 * sshd(8): support NetBSD's utmpx.ut_ss address field. bz#960

 * Add the ssh-sk-helper binary and its manpage to the RPM spec file

 * Detect the Frankenstein monster of Linux/X32 and allow the sandbox
   to function there. bz#3085

Revision 1.1.1.2.4.2 / (download) - annotate - [select for diffs], Mon Apr 13 07:45:20 2020 UTC (3 years, 11 months ago) by martin
Branch: phil-wifi
Changes since 1.1.1.2.4.1: +104 -0 lines
Diff to previous 1.1.1.2.4.1 (colored) to branchpoint 1.1.1.2 (colored) next main 1.1.1.3 (colored) to selected 1.1.1.5 (colored)

Mostly merge changes from HEAD upto 20200411

Revision 1.1.1.2.4.1, Thu Feb 27 00:21:37 2020 UTC (4 years, 1 month ago) by martin
Branch: phil-wifi
Changes since 1.1.1.2: +0 -104 lines
FILE REMOVED

file sshsig.h was added on branch phil-wifi on 2020-04-13 07:45:20 +0000

Revision 1.1.1.2 / (download) - annotate - [select for diffs] (vendor branch), Thu Feb 27 00:21:37 2020 UTC (4 years, 1 month ago) by christos
Branch: OPENSSH, MAIN
CVS Tags: v83-20200527, v82-20200214, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, is-mlppp-base, is-mlppp
Branch point for: phil-wifi
Changes since 1.1.1.1: +19 -7 lines
Diff to previous 1.1.1.1 (colored) to selected 1.1.1.5 (colored)

OpenSSH 8.2/8.2p1 (2020-02-14)
OpenSSH 8.2 was released on 2020-02-14. It is available from the
mirrors listed at https://www.openssh.com/.

OpenSSH is a 100% complete SSH protocol 2.0 implementation and
includes sftp client and server support.

Once again, we would like to thank the OpenSSH community for their
continued support of the project, especially those who contributed
code or patches, reported bugs, tested snapshots or donated to the
project. More information on donations may be found at:
https://www.openssh.com/donations.html

Future deprecation notice
=========================

It is now possible[1] to perform chosen-prefix attacks against the
SHA-1 hash algorithm for less than USD$50K. For this reason, we will
be disabling the "ssh-rsa" public key signature algorithm that depends
on SHA-1 by default in a near-future release.

This algorithm is unfortunately still used widely despite the
existence of better alternatives, being the only remaining public key
signature algorithm specified by the original SSH RFCs.

The better alternatives include:

 * The RFC8332 RSA SHA-2 signature algorithms rsa-sha2-256/512. These
   algorithms have the advantage of using the same key type as
   "ssh-rsa" but use the safe SHA-2 hash algorithms. These have been
   supported since OpenSSH 7.2 and are already used by default if the
   client and server support them.

 * The ssh-ed25519 signature algorithm. It has been supported in
   OpenSSH since release 6.5.

 * The RFC5656 ECDSA algorithms: ecdsa-sha2-nistp256/384/521. These
   have been supported by OpenSSH since release 5.7.

To check whether a server is using the weak ssh-rsa public key
algorithm for host authentication, try to connect to it after
removing the ssh-rsa algorithm from ssh(1)'s allowed list:

    ssh -oHostKeyAlgorithms=-ssh-rsa user@host

If the host key verification fails and no other supported host key
types are available, the server software on that host should be
upgraded.

A future release of OpenSSH will enable UpdateHostKeys by default
to allow the client to automatically migrate to better algorithms.
Users may consider enabling this option manually.

[1] "SHA-1 is a Shambles: First Chosen-Prefix Collision on SHA-1 and
    Application to the PGP Web of Trust" Leurent, G and Peyrin, T
    (2020) https://eprint.iacr.org/2020/014.pdf

Security
========

 * ssh(1), sshd(8), ssh-keygen(1): this release removes the "ssh-rsa"
   (RSA/SHA1) algorithm from those accepted for certificate signatures
   (i.e. the client and server CASignatureAlgorithms option) and will
   use the rsa-sha2-512 signature algorithm by default when the
   ssh-keygen(1) CA signs new certificates.

   Certificates are at special risk to the aforementioned SHA1
   collision vulnerability as an attacker has effectively unlimited
   time in which to craft a collision that yields them a valid
   certificate, far more than the relatively brief LoginGraceTime
   window that they have to forge a host key signature.

   The OpenSSH certificate format includes a CA-specified (typically
   random) nonce value near the start of the certificate that should
   make exploitation of chosen-prefix collisions in this context
   challenging, as the attacker does not have full control over the
   prefix that actually gets signed. Nonetheless, SHA1 is now a
   demonstrably broken algorithm and futher improvements in attacks
   are highly likely.

   OpenSSH releases prior to 7.2 do not support the newer RSA/SHA2
   algorithms and will refuse to accept certificates signed by an
   OpenSSH 8.2+ CA using RSA keys unless the unsafe algorithm is
   explicitly selected during signing ("ssh-keygen -t ssh-rsa").
   Older clients/servers may use another CA key type such as
   ssh-ed25519 (supported since OpenSSH 6.5) or one of the
   ecdsa-sha2-nistp256/384/521 types (supported since OpenSSH 5.7)
   instead if they cannot be upgraded.

Potentially-incompatible changes
================================

This release includes a number of changes that may affect existing
configurations:

 * ssh(1), sshd(8): the above removal of "ssh-rsa" from the accepted
   CASignatureAlgorithms list.

 * ssh(1), sshd(8): this release removes diffie-hellman-group14-sha1
   from the default key exchange proposal for both the client and
   server.

 * ssh-keygen(1): the command-line options related to the generation
   and screening of safe prime numbers used by the
   diffie-hellman-group-exchange-* key exchange algorithms have
   changed. Most options have been folded under the -O flag.

 * sshd(8): the sshd listener process title visible to ps(1) has
   changed to include information about the number of connections that
   are currently attempting authentication and the limits configured
   by MaxStartups.

 * ssh-sk-helper(8): this is a new binary. It is used by the FIDO/U2F
   support to provide address-space isolation for token middleware
   libraries (including the internal one). It needs to be installed
   in the expected path, typically under /usr/libexec or similar.

Changes since OpenSSH 8.1
=========================

This release contains some significant new features.

FIDO/U2F Support
----------------

This release adds support for FIDO/U2F hardware authenticators to
OpenSSH. U2F/FIDO are open standards for inexpensive two-factor
authentication hardware that are widely used for website
authentication.  In OpenSSH FIDO devices are supported by new public
key types "ecdsa-sk" and "ed25519-sk", along with corresponding
certificate types.

ssh-keygen(1) may be used to generate a FIDO token-backed key, after
which they may be used much like any other key type supported by
OpenSSH, so long as the hardware token is attached when the keys are
used. FIDO tokens also generally require the user explicitly authorise
operations by touching or tapping them.

Generating a FIDO key requires the token be attached, and will usually
require the user tap the token to confirm the operation:

  $ ssh-keygen -t ecdsa-sk -f ~/.ssh/id_ecdsa_sk
  Generating public/private ecdsa-sk key pair.
  You may need to touch your security key to authorize key generation.
  Enter file in which to save the key (/home/djm/.ssh/id_ecdsa_sk):
  Enter passphrase (empty for no passphrase):
  Enter same passphrase again:
  Your identification has been saved in /home/djm/.ssh/id_ecdsa_sk
  Your public key has been saved in /home/djm/.ssh/id_ecdsa_sk.pub

This will yield a public and private key-pair. The private key file
should be useless to an attacker who does not have access to the
physical token. After generation, this key may be used like any other
supported key in OpenSSH and may be listed in authorized_keys, added
to ssh-agent(1), etc. The only additional stipulation is that the FIDO
token that the key belongs to must be attached when the key is used.

FIDO tokens are most commonly connected via USB but may be attached
via other means such as Bluetooth or NFC. In OpenSSH, communication
with the token is managed via a middleware library, specified by the
SecurityKeyProvider directive in ssh/sshd_config(5) or the
$SSH_SK_PROVIDER environment variable for ssh-keygen(1) and
ssh-add(1). The API for this middleware is documented in the sk-api.h
and PROTOCOL.u2f files in the source distribution.

OpenSSH includes a middleware ("SecurityKeyProvider=internal") with
support for USB tokens. It is automatically enabled in OpenBSD and may
be enabled in portable OpenSSH via the configure flag
--with-security-key-builtin. If the internal middleware is enabled
then it is automatically used by default. This internal middleware
requires that libfido2 (https://github.com/Yubico/libfido2) and its
dependencies be installed. We recommend that packagers of portable
OpenSSH enable the built-in middleware, as it provides the
lowest-friction experience for users.

Note: FIDO/U2F tokens are required to implement the ECDSA-P256
"ecdsa-sk" key type, but hardware support for Ed25519 "ed25519-sk" is
less common. Similarly, not all hardware tokens support some of the
optional features such as resident keys.

The protocol-level changes to support FIDO/U2F keys in SSH are
documented in the PROTOCOL.u2f file in the OpenSSH source
distribution.

There are a number of supporting changes to this feature:

 * ssh-keygen(1): add a "no-touch-required" option when generating
   FIDO-hosted keys, that disables their default behaviour of
   requiring a physical touch/tap on the token during authentication.
   Note: not all tokens support disabling the touch requirement.

 * sshd(8): add a sshd_config PubkeyAuthOptions directive that
   collects miscellaneous public key authentication-related options
   for sshd(8). At present it supports only a single option
   "no-touch-required". This causes sshd to skip its default check for
   FIDO/U2F keys that the signature was authorised by a touch or press
   event on the token hardware.

 * ssh(1), sshd(8), ssh-keygen(1): add a "no-touch-required" option
   for authorized_keys and a similar extension for certificates. This
   option disables the default requirement that FIDO key signatures
   attest that the user touched their key to authorize them, mirroring
   the similar PubkeyAuthOptions sshd_config option.

 * ssh-keygen(1): add support for the writing the FIDO attestation
   information that is returned when new keys are generated via the
   "-O write-attestation=/path" option. FIDO attestation certificates
   may be used to verify that a FIDO key is hosted in trusted
   hardware. OpenSSH does not currently make use of this information,
   beyond optionally writing it to disk.

FIDO2 resident keys
-------------------

FIDO/U2F OpenSSH keys consist of two parts: a "key handle" part stored
in the private key file on disk, and a per-device private key that is
unique to each FIDO/U2F token and that cannot be exported from the
token hardware. These are combined by the hardware at authentication
time to derive the real key that is used to sign authentication
challenges.

For tokens that are required to move between computers, it can be
cumbersome to have to move the private key file first. To avoid this
requirement, tokens implementing the newer FIDO2 standard support
"resident keys", where it is possible to effectively retrieve the key
handle part of the key from the hardware.

OpenSSH supports this feature, allowing resident keys to be generated
using the ssh-keygen(1) "-O resident" flag. This will produce a
public/private key pair as usual, but it will be possible to retrieve
the private key part from the token later. This may be done using
"ssh-keygen -K", which will download all available resident keys from
the tokens attached to the host and write public/private key files
for them. It is also possible to download and add resident keys
directly to ssh-agent(1) without writing files to the file-system
using "ssh-add -K".

Resident keys are indexed on the token by the application string and
user ID. By default, OpenSSH uses an application string of "ssh:" and
an empty user ID. If multiple resident keys on a single token are
desired then it may be necessary to override one or both of these
defaults using the ssh-keygen(1) "-O application=" or "-O user="
options. Note: OpenSSH will only download and use resident keys whose
application string begins with "ssh:"

Storing both parts of a key on a FIDO token increases the likelihood
of an attacker being able to use a stolen token device. For this
reason, tokens should enforce PIN authentication before allowing
download of keys, and users should set a PIN on their tokens before
creating any resident keys.

Other New Features
------------------

 * sshd(8): add an Include sshd_config keyword that allows including
   additional configuration files via glob(3) patterns. bz2468

 * ssh(1)/sshd(8): make the LE (low effort) DSCP code point available
   via the IPQoS directive; bz2986,

 * ssh(1): when AddKeysToAgent=yes is set and the key contains no
   comment, add the key to the agent with the key's path as the
   comment. bz2564

 * ssh-keygen(1), ssh-agent(1): expose PKCS#11 key labels and X.509
   subjects as key comments, rather than simply listing the PKCS#11
   provider library path. PR138

 * ssh-keygen(1): allow PEM export of DSA and ECDSA keys; bz3091

 * ssh(1), sshd(8): make zlib compile-time optional, available via the
   Makefile.inc ZLIB flag on OpenBSD or via the --with-zlib configure
   option for OpenSSH portable.

 * sshd(8): when clients get denied by MaxStartups, send a
   notification prior to the SSH2 protocol banner according to
   RFC4253 section 4.2.

 * ssh(1), ssh-agent(1): when invoking the $SSH_ASKPASS prompt
   program, pass a hint to the program to describe the type of
   desired prompt.  The possible values are "confirm" (indicating
   that a yes/no confirmation dialog with no text entry should be
   shown), "none" (to indicate an informational message only), or
   blank for the original ssh-askpass behaviour of requesting a
   password/phrase.

 * ssh(1): allow forwarding a different agent socket to the path
   specified by $SSH_AUTH_SOCK, by extending the existing ForwardAgent
   option to accepting an explicit path or the name of an environment
   variable in addition to yes/no.

 * ssh-keygen(1): add a new signature operations "find-principals" to
   look up the principal associated with a signature from an allowed-
   signers file.

 * sshd(8): expose the number of currently-authenticating connections
   along with the MaxStartups limit in the process title visible to
   "ps".

Bugfixes
--------

 * sshd(8): make ClientAliveCountMax=0 have sensible semantics: it
   will now disable connection killing entirely rather than the
   current behaviour of instantly killing the connection after the
   first liveness test regardless of success. bz2627

 * sshd(8): clarify order of AllowUsers / DenyUsers vs AllowGroups /
   DenyGroups in the sshd(8) manual page. bz1690

 * sshd(8): better describe HashKnownHosts in the manual page. bz2560

 * sshd(8): clarify that that permitopen=/PermitOpen do no name or
   address translation in the manual page. bz3099

 * sshd(8): allow the UpdateHostKeys feature to function when
   multiple known_hosts files are in use. When updating host keys,
   ssh will now search subsequent known_hosts files, but will add
   updated host keys to the first specified file only. bz2738

 * All: replace all calls to signal(2) with a wrapper around
   sigaction(2). This wrapper blocks all other signals during the
   handler preventing races between handlers, and sets SA_RESTART
   which should reduce the potential for short read/write operations.

 * sftp(1): fix a race condition in the SIGCHILD handler that could
   turn in to a kill(-1); bz3084

 * sshd(8): fix a case where valid (but extremely large) SSH channel
   IDs were being incorrectly rejected. bz3098

 * ssh(1): when checking host key fingerprints as answers to new
   hostkey prompts, ignore whitespace surrounding the fingerprint
   itself.

 * All: wait for file descriptors to be readable or writeable during
   non-blocking connect, not just readable. Prevents a timeout when
   the server doesn't immediately send a banner (e.g. multiplexers
   like sslh)

 * sshd_config(5): document the sntrup4591761x25519-sha512@tinyssh.org
   key exchange algorithm. PR#151

Revision 1.1.1.1 / (download) - annotate - [select for diffs] (vendor branch), Sat Oct 12 15:14:13 2019 UTC (4 years, 5 months ago) by christos
Branch: OPENSSH, MAIN
CVS Tags: v81-20191009, phil-wifi-20191119
Changes since 1.1: +0 -0 lines
Diff to previous 1.1 (colored) to selected 1.1.1.5 (colored)

OpenSSH 8.1 was released on 2019-10-09. It is available from the
mirrors listed at https://www.openssh.com/.

OpenSSH is a 100% complete SSH protocol 2.0 implementation and
includes sftp client and server support.

Once again, we would like to thank the OpenSSH community for their
continued support of the project, especially those who contributed
code or patches, reported bugs, tested snapshots or donated to the
project. More information on donations may be found at:
http://www.openssh.com/donations.html

Security
========

 * ssh(1), sshd(8), ssh-add(1), ssh-keygen(1): an exploitable integer
   overflow bug was found in the private key parsing code for the XMSS
   key type. This key type is still experimental and support for it is
   not compiled by default. No user-facing autoconf option exists in
   portable OpenSSH to enable it. This bug was found by Adam Zabrocki
   and reported via SecuriTeam's SSD program.

 * ssh(1), sshd(8), ssh-agent(1): add protection for private keys at
   rest in RAM against speculation and memory side-channel attacks like
   Spectre, Meltdown and Rambleed. This release encrypts private keys
   when they are not in use with a symmetric key that is derived from a
   relatively large "prekey" consisting of random data (currently 16KB).

Potentially-incompatible changes
================================

This release includes a number of changes that may affect existing
configurations:

 * ssh-keygen(1): when acting as a CA and signing certificates with
   an RSA key, default to using the rsa-sha2-512 signature algorithm.
   Certificates signed by RSA keys will therefore be incompatible
   with OpenSSH versions prior to 7.2 unless the default is
   overridden (using "ssh-keygen -t ssh-rsa -s ...").

Revision 1.1 / (download) - annotate - [select for diffs], Sat Oct 12 15:14:13 2019 UTC (4 years, 5 months ago) by christos
Branch point for: MAIN
Diff to selected 1.1.1.5 (colored)

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