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Annotation of src/crypto/external/bsd/openssh/dist/readconf.c, Revision 1.37

1.36      kim         1: /*     $NetBSD: readconf.c,v 1.35 2021/09/02 11:26:18 christos Exp $   */
1.37    ! christos    2: /* $OpenBSD: readconf.c,v 1.363 2021/09/16 05:36:03 djm Exp $ */
1.32      christos    3:
1.1       christos    4: /*
                      5:  * Author: Tatu Ylonen <ylo@cs.hut.fi>
                      6:  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                      7:  *                    All rights reserved
                      8:  * Functions for reading the configuration files.
                      9:  *
                     10:  * As far as I am concerned, the code I have written for this software
                     11:  * can be used freely for any purpose.  Any derived versions of this
                     12:  * software must be clearly marked as such, and if the derived work is
                     13:  * incompatible with the protocol description in the RFC file, it must be
                     14:  * called by a name other than "ssh" or "Secure Shell".
                     15:  */
                     16:
1.2       christos   17: #include "includes.h"
1.36      kim        18: __RCSID("$NetBSD: readconf.c,v 1.35 2021/09/02 11:26:18 christos Exp $");
1.1       christos   19: #include <sys/types.h>
                     20: #include <sys/stat.h>
                     21: #include <sys/socket.h>
1.12      christos   22: #include <sys/wait.h>
                     23: #include <sys/un.h>
1.1       christos   24:
                     25: #include <netinet/in.h>
1.5       christos   26: #include <netinet/ip.h>
1.1       christos   27:
                     28: #include <ctype.h>
                     29: #include <errno.h>
1.12      christos   30: #include <fcntl.h>
1.19      christos   31: #include <glob.h>
1.1       christos   32: #include <netdb.h>
1.12      christos   33: #include <paths.h>
                     34: #include <pwd.h>
1.1       christos   35: #include <signal.h>
                     36: #include <stdio.h>
                     37: #include <string.h>
1.29      christos   38: #include <stdarg.h>
1.1       christos   39: #include <unistd.h>
1.2       christos   40: #include <limits.h>
1.11      christos   41: #include <util.h>
1.13      christos   42: #include <vis.h>
1.1       christos   43:
                     44: #include "xmalloc.h"
                     45: #include "ssh.h"
1.25      christos   46: #include "ssherr.h"
1.1       christos   47: #include "compat.h"
                     48: #include "cipher.h"
                     49: #include "pathnames.h"
                     50: #include "log.h"
1.13      christos   51: #include "sshkey.h"
1.12      christos   52: #include "misc.h"
1.1       christos   53: #include "readconf.h"
                     54: #include "match.h"
                     55: #include "kex.h"
                     56: #include "mac.h"
1.11      christos   57: #include "fmt_scaled.h"
1.12      christos   58: #include "uidswap.h"
1.13      christos   59: #include "myproposal.h"
                     60: #include "digest.h"
1.1       christos   61:
                     62: /* Format of the configuration file:
                     63:
                     64:    # Configuration data is parsed as follows:
                     65:    #  1. command line options
                     66:    #  2. user-specific file
                     67:    #  3. system-wide file
                     68:    # Any configuration value is only changed the first time it is set.
                     69:    # Thus, host-specific definitions should be at the beginning of the
                     70:    # configuration file, and defaults at the end.
                     71:
                     72:    # Host-specific declarations.  These may override anything above.  A single
                     73:    # host may match multiple declarations; these are processed in the order
                     74:    # that they are given in.
                     75:
                     76:    Host *.ngs.fi ngs.fi
                     77:      User foo
                     78:
                     79:    Host fake.com
1.28      christos   80:      Hostname another.host.name.real.org
1.1       christos   81:      User blaah
                     82:      Port 34289
                     83:      ForwardX11 no
                     84:      ForwardAgent no
                     85:
                     86:    Host books.com
                     87:      RemoteForward 9999 shadows.cs.hut.fi:9999
1.21      christos   88:      Ciphers 3des-cbc
1.1       christos   89:
                     90:    Host fascist.blob.com
                     91:      Port 23123
                     92:      User tylonen
                     93:      PasswordAuthentication no
                     94:
                     95:    Host puukko.hut.fi
                     96:      User t35124p
                     97:      ProxyCommand ssh-proxy %h %p
                     98:
                     99:    Host *.fr
                    100:      PublicKeyAuthentication no
                    101:
                    102:    Host *.su
1.21      christos  103:      Ciphers aes128-ctr
1.1       christos  104:      PasswordAuthentication no
                    105:
                    106:    Host vpn.fake.com
                    107:      Tunnel yes
                    108:      TunnelDevice 3
                    109:
                    110:    # Defaults for various options
                    111:    Host *
                    112:      ForwardAgent no
                    113:      ForwardX11 no
                    114:      PasswordAuthentication yes
                    115:      StrictHostKeyChecking yes
                    116:      TcpKeepAlive no
                    117:      IdentityFile ~/.ssh/identity
                    118:      Port 22
                    119:      EscapeChar ~
                    120:
                    121: */
                    122:
1.19      christos  123: static int read_config_file_depth(const char *filename, struct passwd *pw,
                    124:     const char *host, const char *original_host, Options *options,
1.27      christos  125:     int flags, int *activep, int *want_final_pass, int depth);
1.19      christos  126: static int process_config_line_depth(Options *options, struct passwd *pw,
                    127:     const char *host, const char *original_host, char *line,
1.27      christos  128:     const char *filename, int linenum, int *activep, int flags,
                    129:     int *want_final_pass, int depth);
1.19      christos  130:
1.1       christos  131: /* Keyword tokens. */
                    132:
                    133: typedef enum {
                    134:        oBadOption,
1.19      christos  135:        oHost, oMatch, oInclude,
1.4       adam      136:        oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
                    137:        oGatewayPorts, oExitOnForwardFailure,
1.29      christos  138:        oPasswordAuthentication,
1.35      christos  139:        oXAuthLocation,
1.2       christos  140: #if defined(KRB4) || defined(KRB5)
                    141:        oKerberosAuthentication,
                    142: #endif
                    143: #if defined(AFS) || defined(KRB5)
                    144:        oKerberosTgtPassing,
                    145: #endif
                    146: #ifdef AFS
                    147:        oAFSTokenPassing,
                    148: #endif
1.29      christos  149:        oIdentityFile, oHostname, oPort, oRemoteForward, oLocalForward,
1.33      christos  150:        oPermitRemoteOpen,
1.19      christos  151:        oCertificateFile, oAddKeysToAgent, oIdentityAgent,
1.29      christos  152:        oUser, oEscapeChar, oProxyCommand,
1.1       christos  153:        oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
                    154:        oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.29      christos  155:        oTCPKeepAlive, oNumberOfPasswordPrompts,
1.33      christos  156:        oLogFacility, oLogLevel, oLogVerbose, oCiphers, oMacs,
1.13      christos  157:        oPubkeyAuthentication,
1.1       christos  158:        oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
                    159:        oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.23      christos  160:        oHostKeyAlgorithms, oBindAddress, oBindInterface, oPKCS11Provider,
1.1       christos  161:        oClearAllForwardings, oNoHostAuthenticationForLocalhost,
                    162:        oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
                    163:        oAddressFamily, oGssAuthentication, oGssDelegateCreds,
                    164:        oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.25      christos  165:        oSendEnv, oSetEnv, oControlPath, oControlMaster, oControlPersist,
1.4       adam      166:        oHashKnownHosts,
1.22      christos  167:        oTunnel, oTunnelDevice,
                    168:        oLocalCommand, oPermitLocalCommand, oRemoteCommand,
1.17      christos  169:        oVisualHostKey,
1.35      christos  170:        oKexAlgorithms, oIPQoS, oRequestTTY, oSessionType, oStdinNull,
                    171:        oForkAfterAuthentication, oIgnoreUnknown, oProxyUseFdpass,
1.12      christos  172:        oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
                    173:        oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.13      christos  174:        oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.33      christos  175:        oFingerprintHash, oUpdateHostkeys, oHostbasedAcceptedAlgorithms,
                    176:        oPubkeyAcceptedAlgorithms, oCASignatureAlgorithms, oProxyJump,
                    177:        oSecurityKeyProvider, oKnownHostsCommand,
1.2       christos  178:        oNoneEnabled, oTcpRcvBufPoll, oTcpRcvBuf, oNoneSwitch, oHPNDisabled,
                    179:        oHPNBufferSize,
1.7       tls       180:        oSendVersionFirst,
1.22      christos  181:        oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1       christos  182: } OpCodes;
                    183:
                    184: /* Textual representations of the tokens. */
                    185:
                    186: static struct {
                    187:        const char *name;
                    188:        OpCodes opcode;
                    189: } keywords[] = {
1.21      christos  190:        /* Deprecated options */
1.22      christos  191:        { "protocol", oIgnore }, /* NB. silently ignored */
                    192:        { "cipher", oDeprecated },
1.21      christos  193:        { "fallbacktorsh", oDeprecated },
                    194:        { "globalknownhostsfile2", oDeprecated },
                    195:        { "rhostsauthentication", oDeprecated },
                    196:        { "userknownhostsfile2", oDeprecated },
                    197:        { "useroaming", oDeprecated },
                    198:        { "usersh", oDeprecated },
1.25      christos  199:        { "useprivilegedport", oDeprecated },
1.21      christos  200:
                    201:        /* Unsupported options */
1.30      kim       202: #ifdef AFS
                    203:        { "afstokenpassing", oAFSTokenPassing },
                    204: #else
1.21      christos  205:        { "afstokenpassing", oUnsupported },
1.30      kim       206: #endif
                    207: #if defined(KRB4) || defined(KRB5)
                    208:        { "kerberosauthentication", oKerberosAuthentication },
                    209: #else
1.21      christos  210:        { "kerberosauthentication", oUnsupported },
1.30      kim       211: #endif
                    212: #if defined(AFS) || defined(KRB5)
                    213:        { "kerberostgtpassing", oKerberosTgtPassing },
                    214:        { "kerberos5tgtpassing", oKerberosTgtPassing },         /* alias */
                    215:        { "kerberos4tgtpassing", oKerberosTgtPassing },         /* alias */
                    216: #else
1.21      christos  217:        { "kerberostgtpassing", oUnsupported },
1.30      kim       218:        { "kerberos5tgtpassing", oUnsupported },
                    219:        { "kerberos4tgtpassing", oUnsupported },
                    220: #endif
1.29      christos  221:        { "rsaauthentication", oUnsupported },
                    222:        { "rhostsrsaauthentication", oUnsupported },
                    223:        { "compressionlevel", oUnsupported },
1.21      christos  224:
                    225:        /* Sometimes-unsupported options */
                    226: #if defined(GSSAPI)
                    227:        { "gssapiauthentication", oGssAuthentication },
                    228:        { "gssapidelegatecredentials", oGssDelegateCreds },
                    229: # else
                    230:        { "gssapiauthentication", oUnsupported },
                    231:        { "gssapidelegatecredentials", oUnsupported },
                    232: #endif
                    233: #ifdef ENABLE_PKCS11
1.27      christos  234:        { "pkcs11provider", oPKCS11Provider },
1.21      christos  235:        { "smartcarddevice", oPKCS11Provider },
                    236: # else
                    237:        { "smartcarddevice", oUnsupported },
                    238:        { "pkcs11provider", oUnsupported },
                    239: #endif
                    240:
1.1       christos  241:        { "forwardagent", oForwardAgent },
                    242:        { "forwardx11", oForwardX11 },
                    243:        { "forwardx11trusted", oForwardX11Trusted },
1.4       adam      244:        { "forwardx11timeout", oForwardX11Timeout },
1.1       christos  245:        { "exitonforwardfailure", oExitOnForwardFailure },
                    246:        { "xauthlocation", oXAuthLocation },
                    247:        { "gatewayports", oGatewayPorts },
                    248:        { "passwordauthentication", oPasswordAuthentication },
                    249:        { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
                    250:        { "kbdinteractivedevices", oKbdInteractiveDevices },
1.36      kim       251:        { "challengeresponseauthentication", oKbdInteractiveAuthentication }, /* alias */
                    252:        { "skeyauthentication", oKbdInteractiveAuthentication }, /* alias */
                    253:        { "tisauthentication", oKbdInteractiveAuthentication },  /* alias */
1.1       christos  254:        { "pubkeyauthentication", oPubkeyAuthentication },
                    255:        { "dsaauthentication", oPubkeyAuthentication },             /* alias */
                    256:        { "hostbasedauthentication", oHostbasedAuthentication },
                    257: #if defined(GSSAPI)
                    258:        { "gssapiauthentication", oGssAuthentication },
                    259:        { "gssapidelegatecredentials", oGssDelegateCreds },
                    260: #else
                    261:        { "gssapiauthentication", oUnsupported },
                    262:        { "gssapidelegatecredentials", oUnsupported },
                    263: #endif
                    264:        { "identityfile", oIdentityFile },
                    265:        { "identityfile2", oIdentityFile },                     /* obsolete */
                    266:        { "identitiesonly", oIdentitiesOnly },
1.18      christos  267:        { "certificatefile", oCertificateFile },
                    268:        { "addkeystoagent", oAddKeysToAgent },
1.19      christos  269:        { "identityagent", oIdentityAgent },
1.28      christos  270:        { "hostname", oHostname },
1.1       christos  271:        { "hostkeyalias", oHostKeyAlias },
                    272:        { "proxycommand", oProxyCommand },
                    273:        { "port", oPort },
                    274:        { "ciphers", oCiphers },
                    275:        { "macs", oMacs },
                    276:        { "remoteforward", oRemoteForward },
                    277:        { "localforward", oLocalForward },
1.33      christos  278:        { "permitremoteopen", oPermitRemoteOpen },
1.1       christos  279:        { "user", oUser },
                    280:        { "host", oHost },
1.12      christos  281:        { "match", oMatch },
1.1       christos  282:        { "escapechar", oEscapeChar },
                    283:        { "globalknownhostsfile", oGlobalKnownHostsFile },
                    284:        { "userknownhostsfile", oUserKnownHostsFile },
                    285:        { "connectionattempts", oConnectionAttempts },
                    286:        { "batchmode", oBatchMode },
                    287:        { "checkhostip", oCheckHostIP },
                    288:        { "stricthostkeychecking", oStrictHostKeyChecking },
                    289:        { "compression", oCompression },
                    290:        { "tcpkeepalive", oTCPKeepAlive },
                    291:        { "keepalive", oTCPKeepAlive },                         /* obsolete */
                    292:        { "numberofpasswordprompts", oNumberOfPasswordPrompts },
1.22      christos  293:        { "syslogfacility", oLogFacility },
1.1       christos  294:        { "loglevel", oLogLevel },
1.33      christos  295:        { "logverbose", oLogVerbose },
1.1       christos  296:        { "dynamicforward", oDynamicForward },
                    297:        { "preferredauthentications", oPreferredAuthentications },
                    298:        { "hostkeyalgorithms", oHostKeyAlgorithms },
1.27      christos  299:        { "casignaturealgorithms", oCASignatureAlgorithms },
1.1       christos  300:        { "bindaddress", oBindAddress },
1.23      christos  301:        { "bindinterface", oBindInterface },
1.1       christos  302:        { "clearallforwardings", oClearAllForwardings },
                    303:        { "enablesshkeysign", oEnableSSHKeysign },
                    304:        { "verifyhostkeydns", oVerifyHostKeyDNS },
                    305:        { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
                    306:        { "rekeylimit", oRekeyLimit },
                    307:        { "connecttimeout", oConnectTimeout },
                    308:        { "addressfamily", oAddressFamily },
                    309:        { "serveraliveinterval", oServerAliveInterval },
                    310:        { "serveralivecountmax", oServerAliveCountMax },
                    311:        { "sendenv", oSendEnv },
1.25      christos  312:        { "setenv", oSetEnv },
1.1       christos  313:        { "controlpath", oControlPath },
                    314:        { "controlmaster", oControlMaster },
1.4       adam      315:        { "controlpersist", oControlPersist },
1.1       christos  316:        { "hashknownhosts", oHashKnownHosts },
1.19      christos  317:        { "include", oInclude },
1.1       christos  318:        { "tunnel", oTunnel },
                    319:        { "tunneldevice", oTunnelDevice },
                    320:        { "localcommand", oLocalCommand },
                    321:        { "permitlocalcommand", oPermitLocalCommand },
1.22      christos  322:        { "remotecommand", oRemoteCommand },
1.1       christos  323:        { "visualhostkey", oVisualHostKey },
1.5       christos  324:        { "kexalgorithms", oKexAlgorithms },
                    325:        { "ipqos", oIPQoS },
1.6       christos  326:        { "requesttty", oRequestTTY },
1.35      christos  327:        { "sessiontype", oSessionType },
                    328:        { "stdinnull", oStdinNull },
                    329:        { "forkafterauthentication", oForkAfterAuthentication },
1.12      christos  330:        { "proxyusefdpass", oProxyUseFdpass },
                    331:        { "canonicaldomains", oCanonicalDomains },
                    332:        { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
                    333:        { "canonicalizehostname", oCanonicalizeHostname },
                    334:        { "canonicalizemaxdots", oCanonicalizeMaxDots },
                    335:        { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
                    336:        { "streamlocalbindmask", oStreamLocalBindMask },
                    337:        { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.13      christos  338:        { "revokedhostkeys", oRevokedHostKeys },
                    339:        { "fingerprinthash", oFingerprintHash },
                    340:        { "updatehostkeys", oUpdateHostkeys },
1.35      christos  341:        { "hostbasedacceptedalgorithms", oHostbasedAcceptedAlgorithms },
1.33      christos  342:        { "hostbasedkeytypes", oHostbasedAcceptedAlgorithms }, /* obsolete */
                    343:        { "pubkeyacceptedalgorithms", oPubkeyAcceptedAlgorithms },
                    344:        { "pubkeyacceptedkeytypes", oPubkeyAcceptedAlgorithms }, /* obsolete */
1.19      christos  345:        { "proxyjump", oProxyJump },
1.2       christos  346:        { "noneenabled", oNoneEnabled },
                    347:        { "tcprcvbufpoll", oTcpRcvBufPoll },
                    348:        { "tcprcvbuf", oTcpRcvBuf },
                    349:        { "noneswitch", oNoneSwitch },
                    350:        { "hpndisabled", oHPNDisabled },
                    351:        { "hpnbuffersize", oHPNBufferSize },
1.7       tls       352:        { "sendversionfirst", oSendVersionFirst },
1.12      christos  353:        { "ignoreunknown", oIgnoreUnknown },
1.29      christos  354:        { "proxyjump", oProxyJump },
                    355:        { "securitykeyprovider", oSecurityKeyProvider },
1.33      christos  356:        { "knownhostscommand", oKnownHostsCommand },
1.19      christos  357:
1.1       christos  358:        { NULL, oBadOption }
                    359: };
                    360:
1.33      christos  361: static const char *lookup_opcode_name(OpCodes code);
1.29      christos  362:
                    363: const char *
                    364: kex_default_pk_alg(void)
                    365: {
1.33      christos  366:        static char *pkalgs;
                    367:
                    368:        if (pkalgs == NULL) {
                    369:                char *all_key;
                    370:
                    371:                all_key = sshkey_alg_list(0, 0, 1, ',');
                    372:                pkalgs = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
                    373:                free(all_key);
                    374:        }
                    375:        return pkalgs;
1.29      christos  376: }
                    377:
1.31      christos  378: char *
                    379: ssh_connection_hash(const char *thishost, const char *host, const char *portstr,
                    380:     const char *user)
                    381: {
                    382:        struct ssh_digest_ctx *md;
                    383:        u_char conn_hash[SSH_DIGEST_MAX_LENGTH];
                    384:
                    385:        if ((md = ssh_digest_start(SSH_DIGEST_SHA1)) == NULL ||
                    386:            ssh_digest_update(md, thishost, strlen(thishost)) < 0 ||
                    387:            ssh_digest_update(md, host, strlen(host)) < 0 ||
                    388:            ssh_digest_update(md, portstr, strlen(portstr)) < 0 ||
                    389:            ssh_digest_update(md, user, strlen(user)) < 0 ||
                    390:            ssh_digest_final(md, conn_hash, sizeof(conn_hash)) < 0)
1.33      christos  391:                fatal_f("mux digest failed");
1.31      christos  392:        ssh_digest_free(md);
                    393:        return tohex(conn_hash, ssh_digest_bytes(SSH_DIGEST_SHA1));
                    394: }
                    395:
1.1       christos  396: /*
                    397:  * Adds a local TCP/IP port forward to options.  Never returns if there is an
                    398:  * error.
                    399:  */
                    400:
                    401: void
1.12      christos  402: add_local_forward(Options *options, const struct Forward *newfwd)
1.1       christos  403: {
1.12      christos  404:        struct Forward *fwd;
1.19      christos  405:        int i;
1.4       adam      406:
1.19      christos  407:        /* Don't add duplicates */
                    408:        for (i = 0; i < options->num_local_forwards; i++) {
                    409:                if (forward_equals(newfwd, options->local_forwards + i))
                    410:                        return;
                    411:        }
1.14      christos  412:        options->local_forwards = xreallocarray(options->local_forwards,
1.4       adam      413:            options->num_local_forwards + 1,
                    414:            sizeof(*options->local_forwards));
1.1       christos  415:        fwd = &options->local_forwards[options->num_local_forwards++];
                    416:
                    417:        fwd->listen_host = newfwd->listen_host;
                    418:        fwd->listen_port = newfwd->listen_port;
1.12      christos  419:        fwd->listen_path = newfwd->listen_path;
1.1       christos  420:        fwd->connect_host = newfwd->connect_host;
                    421:        fwd->connect_port = newfwd->connect_port;
1.12      christos  422:        fwd->connect_path = newfwd->connect_path;
1.1       christos  423: }
                    424:
                    425: /*
                    426:  * Adds a remote TCP/IP port forward to options.  Never returns if there is
                    427:  * an error.
                    428:  */
                    429:
                    430: void
1.12      christos  431: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1       christos  432: {
1.12      christos  433:        struct Forward *fwd;
1.19      christos  434:        int i;
1.4       adam      435:
1.19      christos  436:        /* Don't add duplicates */
                    437:        for (i = 0; i < options->num_remote_forwards; i++) {
                    438:                if (forward_equals(newfwd, options->remote_forwards + i))
                    439:                        return;
                    440:        }
1.14      christos  441:        options->remote_forwards = xreallocarray(options->remote_forwards,
1.4       adam      442:            options->num_remote_forwards + 1,
                    443:            sizeof(*options->remote_forwards));
1.1       christos  444:        fwd = &options->remote_forwards[options->num_remote_forwards++];
                    445:
                    446:        fwd->listen_host = newfwd->listen_host;
                    447:        fwd->listen_port = newfwd->listen_port;
1.12      christos  448:        fwd->listen_path = newfwd->listen_path;
1.1       christos  449:        fwd->connect_host = newfwd->connect_host;
                    450:        fwd->connect_port = newfwd->connect_port;
1.12      christos  451:        fwd->connect_path = newfwd->connect_path;
1.8       christos  452:        fwd->handle = newfwd->handle;
1.4       adam      453:        fwd->allocated_port = 0;
1.1       christos  454: }
                    455:
                    456: static void
                    457: clear_forwardings(Options *options)
                    458: {
                    459:        int i;
                    460:
                    461:        for (i = 0; i < options->num_local_forwards; i++) {
1.11      christos  462:                free(options->local_forwards[i].listen_host);
1.12      christos  463:                free(options->local_forwards[i].listen_path);
1.11      christos  464:                free(options->local_forwards[i].connect_host);
1.12      christos  465:                free(options->local_forwards[i].connect_path);
1.1       christos  466:        }
1.4       adam      467:        if (options->num_local_forwards > 0) {
1.11      christos  468:                free(options->local_forwards);
1.4       adam      469:                options->local_forwards = NULL;
                    470:        }
1.1       christos  471:        options->num_local_forwards = 0;
                    472:        for (i = 0; i < options->num_remote_forwards; i++) {
1.11      christos  473:                free(options->remote_forwards[i].listen_host);
1.12      christos  474:                free(options->remote_forwards[i].listen_path);
1.11      christos  475:                free(options->remote_forwards[i].connect_host);
1.12      christos  476:                free(options->remote_forwards[i].connect_path);
1.1       christos  477:        }
1.4       adam      478:        if (options->num_remote_forwards > 0) {
1.11      christos  479:                free(options->remote_forwards);
1.4       adam      480:                options->remote_forwards = NULL;
                    481:        }
1.1       christos  482:        options->num_remote_forwards = 0;
                    483:        options->tun_open = SSH_TUNMODE_NO;
                    484: }
                    485:
1.9       mlelstv   486: void
1.18      christos  487: add_certificate_file(Options *options, const char *path, int userprovided)
                    488: {
                    489:        int i;
                    490:
                    491:        if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
                    492:                fatal("Too many certificate files specified (max %d)",
                    493:                    SSH_MAX_CERTIFICATE_FILES);
                    494:
                    495:        /* Avoid registering duplicates */
                    496:        for (i = 0; i < options->num_certificate_files; i++) {
                    497:                if (options->certificate_file_userprovided[i] == userprovided &&
                    498:                    strcmp(options->certificate_files[i], path) == 0) {
1.33      christos  499:                        debug2_f("ignoring duplicate key %s", path);
1.18      christos  500:                        return;
                    501:                }
                    502:        }
                    503:
                    504:        options->certificate_file_userprovided[options->num_certificate_files] =
                    505:            userprovided;
                    506:        options->certificate_files[options->num_certificate_files++] =
                    507:            xstrdup(path);
                    508: }
                    509:
                    510: void
1.9       mlelstv   511: add_identity_file(Options *options, const char *dir, const char *filename,
                    512:     int userprovided)
                    513: {
                    514:        char *path;
1.12      christos  515:        int i;
1.9       mlelstv   516:
                    517:        if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
                    518:                fatal("Too many identity files specified (max %d)",
                    519:                    SSH_MAX_IDENTITY_FILES);
                    520:
                    521:        if (dir == NULL) /* no dir, filename is absolute */
                    522:                path = xstrdup(filename);
1.22      christos  523:        else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
                    524:                fatal("Identity file path %s too long", path);
1.9       mlelstv   525:
1.12      christos  526:        /* Avoid registering duplicates */
                    527:        for (i = 0; i < options->num_identity_files; i++) {
                    528:                if (options->identity_file_userprovided[i] == userprovided &&
                    529:                    strcmp(options->identity_files[i], path) == 0) {
1.33      christos  530:                        debug2_f("ignoring duplicate key %s", path);
1.12      christos  531:                        free(path);
                    532:                        return;
                    533:                }
                    534:        }
                    535:
1.9       mlelstv   536:        options->identity_file_userprovided[options->num_identity_files] =
                    537:            userprovided;
                    538:        options->identity_files[options->num_identity_files++] = path;
                    539: }
                    540:
1.12      christos  541: int
                    542: default_ssh_port(void)
                    543: {
                    544:        static int port;
                    545:        struct servent *sp;
                    546:
                    547:        if (port == 0) {
                    548:                sp = getservbyname(SSH_SERVICE_NAME, "tcp");
                    549:                port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
                    550:        }
                    551:        return port;
                    552: }
                    553:
                    554: /*
                    555:  * Execute a command in a shell.
                    556:  * Return its exit status or -1 on abnormal exit.
                    557:  */
                    558: static int
                    559: execute_in_shell(const char *cmd)
                    560: {
                    561:        const char *shell;
                    562:        pid_t pid;
1.33      christos  563:        int status;
1.12      christos  564:
                    565:        if ((shell = getenv("SHELL")) == NULL)
                    566:                shell = _PATH_BSHELL;
                    567:
1.28      christos  568:        if (access(shell, X_OK) == -1) {
                    569:                fatal("Shell \"%s\" is not executable: %s",
                    570:                    shell, strerror(errno));
                    571:        }
                    572:
1.12      christos  573:        debug("Executing command: '%.500s'", cmd);
                    574:
                    575:        /* Fork and execute the command. */
                    576:        if ((pid = fork()) == 0) {
                    577:                char *argv[4];
                    578:
1.33      christos  579:                if (stdfd_devnull(1, 1, 0) == -1)
                    580:                        fatal_f("stdfd_devnull failed");
                    581:                closefrom(STDERR_FILENO + 1);
1.12      christos  582:
                    583:                argv[0] = __UNCONST(shell);
                    584:                argv[1] = __UNCONST("-c");
1.18      christos  585:                argv[2] = xstrdup(cmd);
1.12      christos  586:                argv[3] = NULL;
                    587:
                    588:                execv(argv[0], argv);
                    589:                error("Unable to execute '%.100s': %s", cmd, strerror(errno));
                    590:                /* Die with signal to make this error apparent to parent. */
1.29      christos  591:                ssh_signal(SIGTERM, SIG_DFL);
1.12      christos  592:                kill(getpid(), SIGTERM);
                    593:                _exit(1);
                    594:        }
                    595:        /* Parent. */
1.28      christos  596:        if (pid == -1)
1.33      christos  597:                fatal_f("fork: %.100s", strerror(errno));
1.12      christos  598:
                    599:        while (waitpid(pid, &status, 0) == -1) {
                    600:                if (errno != EINTR && errno != EAGAIN)
1.33      christos  601:                        fatal_f("waitpid: %s", strerror(errno));
1.12      christos  602:        }
                    603:        if (!WIFEXITED(status)) {
                    604:                error("command '%.100s' exited abnormally", cmd);
                    605:                return -1;
1.13      christos  606:        }
1.12      christos  607:        debug3("command returned status %d", WEXITSTATUS(status));
                    608:        return WEXITSTATUS(status);
                    609: }
                    610:
                    611: /*
                    612:  * Parse and execute a Match directive.
                    613:  */
                    614: static int
                    615: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.27      christos  616:     const char *host_arg, const char *original_host, int final_pass,
                    617:     int *want_final_pass, const char *filename, int linenum)
1.12      christos  618: {
1.13      christos  619:        char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.12      christos  620:        const char *ruser;
1.13      christos  621:        int r, port, this_result, result = 1, attributes = 0, negate;
1.12      christos  622:        char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
1.25      christos  623:        char uidstr[32];
1.12      christos  624:
                    625:        /*
                    626:         * Configuration is likely to be incomplete at this point so we
                    627:         * must be prepared to use default values.
                    628:         */
                    629:        port = options->port <= 0 ? default_ssh_port() : options->port;
                    630:        ruser = options->user == NULL ? pw->pw_name : options->user;
1.27      christos  631:        if (final_pass) {
1.18      christos  632:                host = xstrdup(options->hostname);
                    633:        } else if (options->hostname != NULL) {
1.12      christos  634:                /* NB. Please keep in sync with ssh.c:main() */
                    635:                host = percent_expand(options->hostname,
                    636:                    "h", host_arg, (char *)NULL);
1.18      christos  637:        } else {
1.12      christos  638:                host = xstrdup(host_arg);
1.18      christos  639:        }
1.12      christos  640:
1.13      christos  641:        debug2("checking match for '%s' host %s originally %s",
                    642:            cp, host, original_host);
                    643:        while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
1.35      christos  644:                /* Terminate on comment */
                    645:                if (*attrib == '#') {
                    646:                        cp = NULL; /* mark all arguments consumed */
                    647:                        break;
                    648:                }
                    649:                arg = criteria = NULL;
1.13      christos  650:                this_result = 1;
                    651:                if ((negate = attrib[0] == '!'))
                    652:                        attrib++;
1.35      christos  653:                /* Criterion "all" has no argument and must appear alone */
1.12      christos  654:                if (strcasecmp(attrib, "all") == 0) {
1.35      christos  655:                        if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
                    656:                            *arg != '\0' && *arg != '#')) {
1.13      christos  657:                                error("%.200s line %d: '%s' cannot be combined "
                    658:                                    "with other Match attributes",
                    659:                                    filename, linenum, oattrib);
1.12      christos  660:                                result = -1;
                    661:                                goto out;
                    662:                        }
1.35      christos  663:                        if (arg != NULL && *arg == '#')
                    664:                                cp = NULL; /* mark all arguments consumed */
1.13      christos  665:                        if (result)
                    666:                                result = negate ? 0 : 1;
1.12      christos  667:                        goto out;
                    668:                }
1.13      christos  669:                attributes++;
1.35      christos  670:                /* criteria "final" and "canonical" have no argument */
1.27      christos  671:                if (strcasecmp(attrib, "canonical") == 0 ||
                    672:                    strcasecmp(attrib, "final") == 0) {
                    673:                        /*
                    674:                         * If the config requests "Match final" then remember
                    675:                         * this so we can perform a second pass later.
                    676:                         */
                    677:                        if (strcasecmp(attrib, "final") == 0 &&
                    678:                            want_final_pass != NULL)
                    679:                                *want_final_pass = 1;
                    680:                        r = !!final_pass;  /* force bitmask member to boolean */
1.13      christos  681:                        if (r == (negate ? 1 : 0))
                    682:                                this_result = result = 0;
                    683:                        debug3("%.200s line %d: %smatched '%s'",
                    684:                            filename, linenum,
                    685:                            this_result ? "" : "not ", oattrib);
                    686:                        continue;
                    687:                }
                    688:                /* All other criteria require an argument */
1.35      christos  689:                if ((arg = strdelim(&cp)) == NULL ||
                    690:                    *arg == '\0' || *arg == '#') {
1.12      christos  691:                        error("Missing Match criteria for %s", attrib);
                    692:                        result = -1;
                    693:                        goto out;
                    694:                }
                    695:                if (strcasecmp(attrib, "host") == 0) {
1.13      christos  696:                        criteria = xstrdup(host);
1.14      christos  697:                        r = match_hostname(host, arg) == 1;
1.13      christos  698:                        if (r == (negate ? 1 : 0))
                    699:                                this_result = result = 0;
1.12      christos  700:                } else if (strcasecmp(attrib, "originalhost") == 0) {
1.13      christos  701:                        criteria = xstrdup(original_host);
1.14      christos  702:                        r = match_hostname(original_host, arg) == 1;
1.13      christos  703:                        if (r == (negate ? 1 : 0))
                    704:                                this_result = result = 0;
1.12      christos  705:                } else if (strcasecmp(attrib, "user") == 0) {
1.13      christos  706:                        criteria = xstrdup(ruser);
1.14      christos  707:                        r = match_pattern_list(ruser, arg, 0) == 1;
1.13      christos  708:                        if (r == (negate ? 1 : 0))
                    709:                                this_result = result = 0;
1.12      christos  710:                } else if (strcasecmp(attrib, "localuser") == 0) {
1.13      christos  711:                        criteria = xstrdup(pw->pw_name);
1.14      christos  712:                        r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.13      christos  713:                        if (r == (negate ? 1 : 0))
                    714:                                this_result = result = 0;
1.12      christos  715:                } else if (strcasecmp(attrib, "exec") == 0) {
1.32      christos  716:                        char *conn_hash_hex, *keyalias;
1.31      christos  717:
1.12      christos  718:                        if (gethostname(thishost, sizeof(thishost)) == -1)
                    719:                                fatal("gethostname: %s", strerror(errno));
                    720:                        strlcpy(shorthost, thishost, sizeof(shorthost));
                    721:                        shorthost[strcspn(thishost, ".")] = '\0';
                    722:                        snprintf(portstr, sizeof(portstr), "%d", port);
1.25      christos  723:                        snprintf(uidstr, sizeof(uidstr), "%llu",
                    724:                            (unsigned long long)pw->pw_uid);
1.31      christos  725:                        conn_hash_hex = ssh_connection_hash(thishost, host,
1.34      christos  726:                            portstr, ruser);
1.32      christos  727:                        keyalias = options->host_key_alias ?
                    728:                            options->host_key_alias : host;
1.12      christos  729:
                    730:                        cmd = percent_expand(arg,
1.31      christos  731:                            "C", conn_hash_hex,
1.12      christos  732:                            "L", shorthost,
                    733:                            "d", pw->pw_dir,
                    734:                            "h", host,
1.32      christos  735:                            "k", keyalias,
1.12      christos  736:                            "l", thishost,
1.13      christos  737:                            "n", original_host,
1.12      christos  738:                            "p", portstr,
                    739:                            "r", ruser,
                    740:                            "u", pw->pw_name,
1.25      christos  741:                            "i", uidstr,
1.12      christos  742:                            (char *)NULL);
1.31      christos  743:                        free(conn_hash_hex);
1.12      christos  744:                        if (result != 1) {
                    745:                                /* skip execution if prior predicate failed */
1.13      christos  746:                                debug3("%.200s line %d: skipped exec "
                    747:                                    "\"%.100s\"", filename, linenum, cmd);
                    748:                                free(cmd);
                    749:                                continue;
                    750:                        }
                    751:                        r = execute_in_shell(cmd);
                    752:                        if (r == -1) {
                    753:                                fatal("%.200s line %d: match exec "
                    754:                                    "'%.100s' error", filename,
                    755:                                    linenum, cmd);
1.12      christos  756:                        }
1.13      christos  757:                        criteria = xstrdup(cmd);
1.12      christos  758:                        free(cmd);
1.13      christos  759:                        /* Force exit status to boolean */
                    760:                        r = r == 0;
                    761:                        if (r == (negate ? 1 : 0))
                    762:                                this_result = result = 0;
1.12      christos  763:                } else {
                    764:                        error("Unsupported Match attribute %s", attrib);
                    765:                        result = -1;
                    766:                        goto out;
                    767:                }
1.13      christos  768:                debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
                    769:                    filename, linenum, this_result ? "": "not ",
                    770:                    oattrib, criteria);
                    771:                free(criteria);
1.12      christos  772:        }
                    773:        if (attributes == 0) {
                    774:                error("One or more attributes required for Match");
                    775:                result = -1;
                    776:                goto out;
                    777:        }
1.13      christos  778:  out:
                    779:        if (result != -1)
                    780:                debug2("match %sfound", result ? "" : "not ");
1.12      christos  781:        *condition = cp;
                    782:        free(host);
                    783:        return result;
                    784: }
                    785:
1.25      christos  786: /* Remove environment variable by pattern */
                    787: static void
                    788: rm_env(Options *options, const char *arg, const char *filename, int linenum)
                    789: {
1.32      christos  790:        int i, j, onum_send_env = options->num_send_env;
1.25      christos  791:        char *cp;
                    792:
                    793:        /* Remove an environment variable */
                    794:        for (i = 0; i < options->num_send_env; ) {
                    795:                cp = xstrdup(options->send_env[i]);
                    796:                if (!match_pattern(cp, arg + 1)) {
                    797:                        free(cp);
                    798:                        i++;
                    799:                        continue;
                    800:                }
                    801:                debug3("%s line %d: removing environment %s",
                    802:                    filename, linenum, cp);
                    803:                free(cp);
                    804:                free(options->send_env[i]);
                    805:                options->send_env[i] = NULL;
                    806:                for (j = i; j < options->num_send_env - 1; j++) {
                    807:                        options->send_env[j] = options->send_env[j + 1];
                    808:                        options->send_env[j + 1] = NULL;
                    809:                }
                    810:                options->num_send_env--;
                    811:                /* NB. don't increment i */
                    812:        }
1.32      christos  813:        if (onum_send_env != options->num_send_env) {
                    814:                options->send_env = xrecallocarray(options->send_env,
                    815:                    onum_send_env, options->num_send_env,
                    816:                    sizeof(*options->send_env));
                    817:        }
1.25      christos  818: }
                    819:
1.1       christos  820: /*
                    821:  * Returns the number of the token pointed to by cp or oBadOption.
                    822:  */
                    823: static OpCodes
1.11      christos  824: parse_token(const char *cp, const char *filename, int linenum,
                    825:     const char *ignored_unknown)
1.1       christos  826: {
1.11      christos  827:        int i;
1.1       christos  828:
                    829:        for (i = 0; keywords[i].name; i++)
1.11      christos  830:                if (strcmp(cp, keywords[i].name) == 0)
1.1       christos  831:                        return keywords[i].opcode;
1.14      christos  832:        if (ignored_unknown != NULL &&
                    833:            match_pattern_list(cp, ignored_unknown, 1) == 1)
1.11      christos  834:                return oIgnoredUnknownOption;
1.1       christos  835:        error("%s: line %d: Bad configuration option: %s",
                    836:            filename, linenum, cp);
                    837:        return oBadOption;
                    838: }
                    839:
1.12      christos  840: /* Multistate option parsing */
                    841: struct multistate {
                    842:        const char *key;
                    843:        int value;
                    844: };
                    845: static const struct multistate multistate_flag[] = {
                    846:        { "true",                       1 },
                    847:        { "false",                      0 },
                    848:        { "yes",                        1 },
                    849:        { "no",                         0 },
                    850:        { NULL, -1 }
                    851: };
                    852: static const struct multistate multistate_yesnoask[] = {
                    853:        { "true",                       1 },
                    854:        { "false",                      0 },
                    855:        { "yes",                        1 },
                    856:        { "no",                         0 },
                    857:        { "ask",                        2 },
                    858:        { NULL, -1 }
                    859: };
1.22      christos  860: static const struct multistate multistate_strict_hostkey[] = {
                    861:        { "true",                       SSH_STRICT_HOSTKEY_YES },
                    862:        { "false",                      SSH_STRICT_HOSTKEY_OFF },
                    863:        { "yes",                        SSH_STRICT_HOSTKEY_YES },
                    864:        { "no",                         SSH_STRICT_HOSTKEY_OFF },
                    865:        { "ask",                        SSH_STRICT_HOSTKEY_ASK },
                    866:        { "off",                        SSH_STRICT_HOSTKEY_OFF },
                    867:        { "accept-new",                 SSH_STRICT_HOSTKEY_NEW },
                    868:        { NULL, -1 }
                    869: };
1.18      christos  870: static const struct multistate multistate_yesnoaskconfirm[] = {
                    871:        { "true",                       1 },
                    872:        { "false",                      0 },
                    873:        { "yes",                        1 },
                    874:        { "no",                         0 },
                    875:        { "ask",                        2 },
                    876:        { "confirm",                    3 },
                    877:        { NULL, -1 }
                    878: };
1.12      christos  879: static const struct multistate multistate_addressfamily[] = {
                    880:        { "inet",                       AF_INET },
                    881:        { "inet6",                      AF_INET6 },
                    882:        { "any",                        AF_UNSPEC },
                    883:        { NULL, -1 }
                    884: };
                    885: static const struct multistate multistate_controlmaster[] = {
                    886:        { "true",                       SSHCTL_MASTER_YES },
                    887:        { "yes",                        SSHCTL_MASTER_YES },
                    888:        { "false",                      SSHCTL_MASTER_NO },
                    889:        { "no",                         SSHCTL_MASTER_NO },
                    890:        { "auto",                       SSHCTL_MASTER_AUTO },
                    891:        { "ask",                        SSHCTL_MASTER_ASK },
                    892:        { "autoask",                    SSHCTL_MASTER_AUTO_ASK },
                    893:        { NULL, -1 }
                    894: };
                    895: static const struct multistate multistate_tunnel[] = {
                    896:        { "ethernet",                   SSH_TUNMODE_ETHERNET },
                    897:        { "point-to-point",             SSH_TUNMODE_POINTOPOINT },
                    898:        { "true",                       SSH_TUNMODE_DEFAULT },
                    899:        { "yes",                        SSH_TUNMODE_DEFAULT },
                    900:        { "false",                      SSH_TUNMODE_NO },
                    901:        { "no",                         SSH_TUNMODE_NO },
                    902:        { NULL, -1 }
                    903: };
                    904: static const struct multistate multistate_requesttty[] = {
                    905:        { "true",                       REQUEST_TTY_YES },
                    906:        { "yes",                        REQUEST_TTY_YES },
                    907:        { "false",                      REQUEST_TTY_NO },
                    908:        { "no",                         REQUEST_TTY_NO },
                    909:        { "force",                      REQUEST_TTY_FORCE },
                    910:        { "auto",                       REQUEST_TTY_AUTO },
                    911:        { NULL, -1 }
                    912: };
1.35      christos  913: static const struct multistate multistate_sessiontype[] = {
                    914:        { "none",                       SESSION_TYPE_NONE },
                    915:        { "subsystem",                  SESSION_TYPE_SUBSYSTEM },
                    916:        { "default",                    SESSION_TYPE_DEFAULT },
                    917:        { NULL, -1 }
                    918: };
1.12      christos  919: static const struct multistate multistate_canonicalizehostname[] = {
                    920:        { "true",                       SSH_CANONICALISE_YES },
                    921:        { "false",                      SSH_CANONICALISE_NO },
                    922:        { "yes",                        SSH_CANONICALISE_YES },
                    923:        { "no",                         SSH_CANONICALISE_NO },
                    924:        { "always",                     SSH_CANONICALISE_ALWAYS },
                    925:        { NULL, -1 }
                    926: };
1.29      christos  927: static const struct multistate multistate_compression[] = {
                    928: #ifdef WITH_ZLIB
                    929:        { "yes",                        COMP_ZLIB },
                    930: #endif
                    931:        { "no",                         COMP_NONE },
                    932:        { NULL, -1 }
                    933: };
1.12      christos  934:
1.32      christos  935: static int
                    936: parse_multistate_value(const char *arg, const char *filename, int linenum,
                    937:     const struct multistate *multistate_ptr)
                    938: {
                    939:        int i;
                    940:
1.33      christos  941:        if (!arg || *arg == '\0') {
                    942:                error("%s line %d: missing argument.", filename, linenum);
                    943:                return -1;
                    944:        }
1.32      christos  945:        for (i = 0; multistate_ptr[i].key != NULL; i++) {
                    946:                if (strcasecmp(arg, multistate_ptr[i].key) == 0)
                    947:                        return multistate_ptr[i].value;
                    948:        }
                    949:        return -1;
                    950: }
                    951:
1.1       christos  952: /*
                    953:  * Processes a single option line as used in the configuration files. This
                    954:  * only sets those values that have not already been set.
                    955:  */
                    956: int
1.12      christos  957: process_config_line(Options *options, struct passwd *pw, const char *host,
1.13      christos  958:     const char *original_host, char *line, const char *filename,
                    959:     int linenum, int *activep, int flags)
1.1       christos  960: {
1.19      christos  961:        return process_config_line_depth(options, pw, host, original_host,
1.27      christos  962:            line, filename, linenum, activep, flags, NULL, 0);
1.19      christos  963: }
                    964:
                    965: #define WHITESPACE " \t\r\n"
                    966: static int
                    967: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
                    968:     const char *original_host, char *line, const char *filename,
1.27      christos  969:     int linenum, int *activep, int flags, int *want_final_pass, int depth)
1.19      christos  970: {
1.35      christos  971:        char *str, **charptr, *endofnumber, *keyword, *arg, *arg2, *p, ch;
1.33      christos  972:        char **cpptr, ***cppptr, fwdarg[256];
                    973:        u_int i, *uintptr, uvalue, max_entries = 0;
1.19      christos  974:        int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.22      christos  975:        int remotefwd, dynamicfwd;
1.1       christos  976:        LogLevel *log_level_ptr;
1.22      christos  977:        SyslogFacility *log_facility_ptr;
1.11      christos  978:        long long val64;
1.1       christos  979:        size_t len;
1.12      christos  980:        struct Forward fwd;
                    981:        const struct multistate *multistate_ptr;
                    982:        struct allowed_cname *cname;
1.19      christos  983:        glob_t gl;
1.23      christos  984:        const char *errstr;
1.35      christos  985:        char **oav = NULL, **av;
                    986:        int oac = 0, ac;
                    987:        int ret = -1;
1.12      christos  988:
                    989:        if (activep == NULL) { /* We are processing a command line directive */
                    990:                cmdline = 1;
                    991:                activep = &cmdline;
                    992:        }
1.1       christos  993:
1.21      christos  994:        /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.14      christos  995:        if ((len = strlen(line)) == 0)
                    996:                return 0;
                    997:        for (len--; len > 0; len--) {
1.21      christos  998:                if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.1       christos  999:                        break;
                   1000:                line[len] = '\0';
                   1001:        }
                   1002:
1.35      christos 1003:        str = line;
1.1       christos 1004:        /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.35      christos 1005:        if ((keyword = strdelim(&str)) == NULL)
1.1       christos 1006:                return 0;
                   1007:        /* Ignore leading whitespace. */
                   1008:        if (*keyword == '\0')
1.35      christos 1009:                keyword = strdelim(&str);
1.1       christos 1010:        if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
                   1011:                return 0;
1.11      christos 1012:        /* Match lowercase keyword */
1.12      christos 1013:        lowercase(keyword);
1.1       christos 1014:
1.35      christos 1015:        /* Prepare to parse remainder of line */
                   1016:        if (str != NULL)
                   1017:                str += strspn(str, WHITESPACE);
                   1018:        if (str == NULL || *str == '\0') {
                   1019:                error("%s line %d: no argument after keyword \"%s\"",
                   1020:                    filename, linenum, keyword);
                   1021:                return -1;
                   1022:        }
1.11      christos 1023:        opcode = parse_token(keyword, filename, linenum,
                   1024:            options->ignored_unknown);
1.35      christos 1025:        if (argv_split(str, &oac, &oav, 1) != 0) {
                   1026:                error("%s line %d: invalid quotes", filename, linenum);
                   1027:                return -1;
                   1028:        }
                   1029:        ac = oac;
                   1030:        av = oav;
1.1       christos 1031:
                   1032:        switch (opcode) {
                   1033:        case oBadOption:
                   1034:                /* don't panic, but count bad options */
1.35      christos 1035:                goto out;
1.22      christos 1036:        case oIgnore:
1.35      christos 1037:                argv_consume(&ac);
                   1038:                break;
1.11      christos 1039:        case oIgnoredUnknownOption:
                   1040:                debug("%s line %d: Ignored unknown option \"%s\"",
                   1041:                    filename, linenum, keyword);
1.35      christos 1042:                argv_consume(&ac);
                   1043:                break;
1.1       christos 1044:        case oConnectTimeout:
                   1045:                intptr = &options->connection_timeout;
                   1046: parse_time:
1.35      christos 1047:                arg = argv_next(&ac, &av);
1.33      christos 1048:                if (!arg || *arg == '\0') {
                   1049:                        error("%s line %d: missing time value.",
1.1       christos 1050:                            filename, linenum);
1.35      christos 1051:                        goto out;
1.33      christos 1052:                }
1.13      christos 1053:                if (strcmp(arg, "none") == 0)
                   1054:                        value = -1;
1.33      christos 1055:                else if ((value = convtime(arg)) == -1) {
                   1056:                        error("%s line %d: invalid time value.",
1.1       christos 1057:                            filename, linenum);
1.35      christos 1058:                        goto out;
1.33      christos 1059:                }
1.1       christos 1060:                if (*activep && *intptr == -1)
                   1061:                        *intptr = value;
                   1062:                break;
                   1063:
                   1064:        case oForwardAgent:
                   1065:                intptr = &options->forward_agent;
1.29      christos 1066:
1.35      christos 1067:                arg = argv_next(&ac, &av);
1.33      christos 1068:                if (!arg || *arg == '\0') {
                   1069:                        error("%s line %d: missing argument.",
1.29      christos 1070:                            filename, linenum);
1.35      christos 1071:                        goto out;
1.33      christos 1072:                }
1.29      christos 1073:
                   1074:                value = -1;
                   1075:                multistate_ptr = multistate_flag;
                   1076:                for (i = 0; multistate_ptr[i].key != NULL; i++) {
                   1077:                        if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
                   1078:                                value = multistate_ptr[i].value;
                   1079:                                break;
                   1080:                        }
                   1081:                }
                   1082:                if (value != -1) {
                   1083:                        if (*activep && *intptr == -1)
                   1084:                                *intptr = value;
                   1085:                        break;
                   1086:                }
                   1087:                /* ForwardAgent wasn't 'yes' or 'no', assume a path */
                   1088:                if (*activep && *intptr == -1)
                   1089:                        *intptr = 1;
                   1090:
                   1091:                charptr = &options->forward_agent_sock_path;
                   1092:                goto parse_agent_path;
                   1093:
                   1094:        case oForwardX11:
                   1095:                intptr = &options->forward_x11;
1.12      christos 1096:  parse_flag:
                   1097:                multistate_ptr = multistate_flag;
                   1098:  parse_multistate:
1.35      christos 1099:                arg = argv_next(&ac, &av);
1.32      christos 1100:                if ((value = parse_multistate_value(arg, filename, linenum,
1.34      christos 1101:                    multistate_ptr)) == -1) {
1.33      christos 1102:                        error("%s line %d: unsupported option \"%s\".",
1.12      christos 1103:                            filename, linenum, arg);
1.35      christos 1104:                        goto out;
1.32      christos 1105:                }
1.1       christos 1106:                if (*activep && *intptr == -1)
                   1107:                        *intptr = value;
                   1108:                break;
                   1109:
                   1110:        case oForwardX11Trusted:
                   1111:                intptr = &options->forward_x11_trusted;
                   1112:                goto parse_flag;
1.13      christos 1113:
1.4       adam     1114:        case oForwardX11Timeout:
                   1115:                intptr = &options->forward_x11_timeout;
                   1116:                goto parse_time;
1.1       christos 1117:
                   1118:        case oGatewayPorts:
1.12      christos 1119:                intptr = &options->fwd_opts.gateway_ports;
1.1       christos 1120:                goto parse_flag;
                   1121:
                   1122:        case oExitOnForwardFailure:
                   1123:                intptr = &options->exit_on_forward_failure;
                   1124:                goto parse_flag;
                   1125:
                   1126:        case oPasswordAuthentication:
                   1127:                intptr = &options->password_authentication;
                   1128:                goto parse_flag;
                   1129:
                   1130:        case oKbdInteractiveAuthentication:
                   1131:                intptr = &options->kbd_interactive_authentication;
                   1132:                goto parse_flag;
                   1133:
                   1134:        case oKbdInteractiveDevices:
                   1135:                charptr = &options->kbd_interactive_devices;
                   1136:                goto parse_string;
                   1137:
                   1138:        case oPubkeyAuthentication:
                   1139:                intptr = &options->pubkey_authentication;
                   1140:                goto parse_flag;
                   1141:
                   1142:        case oHostbasedAuthentication:
                   1143:                intptr = &options->hostbased_authentication;
                   1144:                goto parse_flag;
                   1145:
1.2       christos 1146: #if defined(KRB4) || defined(KRB5)
                   1147:        case oKerberosAuthentication:
                   1148:                intptr = &options->kerberos_authentication;
                   1149:                goto parse_flag;
                   1150: #endif
                   1151: #if defined(AFS) || defined(KRB5)
                   1152:        case oKerberosTgtPassing:
                   1153:                intptr = &options->kerberos_tgt_passing;
                   1154:                goto parse_flag;
                   1155: #endif
                   1156:
1.1       christos 1157:        case oGssAuthentication:
                   1158:                intptr = &options->gss_authentication;
                   1159:                goto parse_flag;
                   1160:
1.2       christos 1161: #ifdef AFS
                   1162:        case oAFSTokenPassing:
                   1163:                intptr = &options->afs_token_passing;
                   1164:                goto parse_flag;
                   1165: #endif
                   1166:
1.1       christos 1167:        case oGssDelegateCreds:
                   1168:                intptr = &options->gss_deleg_creds;
                   1169:                goto parse_flag;
                   1170:
                   1171:        case oBatchMode:
                   1172:                intptr = &options->batch_mode;
                   1173:                goto parse_flag;
                   1174:
                   1175:        case oCheckHostIP:
                   1176:                intptr = &options->check_host_ip;
                   1177:                goto parse_flag;
                   1178:
1.2       christos 1179:        case oNoneEnabled:
                   1180:                intptr = &options->none_enabled;
                   1181:                goto parse_flag;
                   1182:
                   1183:        /* we check to see if the command comes from the */
                   1184:        /* command line or not. If it does then enable it */
                   1185:        /* otherwise fail. NONE should never be a default configuration */
                   1186:        case oNoneSwitch:
                   1187:                if(strcmp(filename,"command-line")==0)
                   1188:                {
                   1189:                    intptr = &options->none_switch;
                   1190:                    goto parse_flag;
                   1191:                } else {
                   1192:                    error("NoneSwitch is found in %.200s.\nYou may only use this configuration option from the command line", filename);
                   1193:                    error("Continuing...");
                   1194:                    debug("NoneSwitch directive found in %.200s.", filename);
                   1195:                    return 0;
                   1196:                }
                   1197:
                   1198:        case oHPNDisabled:
                   1199:                intptr = &options->hpn_disabled;
                   1200:                goto parse_flag;
                   1201:
                   1202:        case oHPNBufferSize:
                   1203:                intptr = &options->hpn_buffer_size;
                   1204:                goto parse_int;
                   1205:
                   1206:        case oTcpRcvBufPoll:
                   1207:                intptr = &options->tcp_rcv_buf_poll;
                   1208:                goto parse_flag;
                   1209:
1.1       christos 1210:        case oVerifyHostKeyDNS:
                   1211:                intptr = &options->verify_host_key_dns;
1.12      christos 1212:                multistate_ptr = multistate_yesnoask;
                   1213:                goto parse_multistate;
1.1       christos 1214:
                   1215:        case oStrictHostKeyChecking:
                   1216:                intptr = &options->strict_host_key_checking;
1.22      christos 1217:                multistate_ptr = multistate_strict_hostkey;
1.12      christos 1218:                goto parse_multistate;
1.1       christos 1219:
                   1220:        case oCompression:
                   1221:                intptr = &options->compression;
1.29      christos 1222:                multistate_ptr = multistate_compression;
                   1223:                goto parse_multistate;
1.1       christos 1224:
                   1225:        case oTCPKeepAlive:
                   1226:                intptr = &options->tcp_keep_alive;
                   1227:                goto parse_flag;
                   1228:
                   1229:        case oNoHostAuthenticationForLocalhost:
                   1230:                intptr = &options->no_host_authentication_for_localhost;
                   1231:                goto parse_flag;
                   1232:
                   1233:        case oNumberOfPasswordPrompts:
                   1234:                intptr = &options->number_of_password_prompts;
                   1235:                goto parse_int;
                   1236:
                   1237:        case oRekeyLimit:
1.35      christos 1238:                arg = argv_next(&ac, &av);
1.33      christos 1239:                if (!arg || *arg == '\0') {
                   1240:                        error("%.200s line %d: Missing argument.", filename,
1.11      christos 1241:                            linenum);
1.35      christos 1242:                        goto out;
1.33      christos 1243:                }
1.11      christos 1244:                if (strcmp(arg, "default") == 0) {
                   1245:                        val64 = 0;
                   1246:                } else {
1.33      christos 1247:                        if (scan_scaled(arg, &val64) == -1) {
                   1248:                                error("%.200s line %d: Bad number '%s': %s",
1.11      christos 1249:                                    filename, linenum, arg, strerror(errno));
1.35      christos 1250:                                goto out;
1.33      christos 1251:                        }
                   1252:                        if (val64 != 0 && val64 < 16) {
                   1253:                                error("%.200s line %d: RekeyLimit too small",
1.11      christos 1254:                                    filename, linenum);
1.35      christos 1255:                                goto out;
1.33      christos 1256:                        }
1.1       christos 1257:                }
                   1258:                if (*activep && options->rekey_limit == -1)
1.18      christos 1259:                        options->rekey_limit = val64;
1.35      christos 1260:                if (ac != 0) { /* optional rekey interval present */
                   1261:                        if (strcmp(av[0], "none") == 0) {
                   1262:                                (void)argv_next(&ac, &av);      /* discard */
1.11      christos 1263:                                break;
                   1264:                        }
                   1265:                        intptr = &options->rekey_interval;
                   1266:                        goto parse_time;
                   1267:                }
1.1       christos 1268:                break;
                   1269:
                   1270:        case oIdentityFile:
1.35      christos 1271:                arg = argv_next(&ac, &av);
1.33      christos 1272:                if (!arg || *arg == '\0') {
                   1273:                        error("%.200s line %d: Missing argument.",
                   1274:                            filename, linenum);
1.35      christos 1275:                        goto out;
1.33      christos 1276:                }
1.1       christos 1277:                if (*activep) {
                   1278:                        intptr = &options->num_identity_files;
1.33      christos 1279:                        if (*intptr >= SSH_MAX_IDENTITY_FILES) {
                   1280:                                error("%.200s line %d: Too many identity files "
                   1281:                                    "specified (max %d).", filename, linenum,
                   1282:                                    SSH_MAX_IDENTITY_FILES);
1.35      christos 1283:                                goto out;
1.33      christos 1284:                        }
1.13      christos 1285:                        add_identity_file(options, NULL,
                   1286:                            arg, flags & SSHCONF_USERCONF);
1.1       christos 1287:                }
                   1288:                break;
                   1289:
1.18      christos 1290:        case oCertificateFile:
1.35      christos 1291:                arg = argv_next(&ac, &av);
1.33      christos 1292:                if (!arg || *arg == '\0') {
                   1293:                        error("%.200s line %d: Missing argument.",
1.18      christos 1294:                            filename, linenum);
1.35      christos 1295:                        goto out;
1.33      christos 1296:                }
1.18      christos 1297:                if (*activep) {
                   1298:                        intptr = &options->num_certificate_files;
                   1299:                        if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1.33      christos 1300:                                error("%.200s line %d: Too many certificate "
1.18      christos 1301:                                    "files specified (max %d).",
                   1302:                                    filename, linenum,
                   1303:                                    SSH_MAX_CERTIFICATE_FILES);
1.35      christos 1304:                                goto out;
1.18      christos 1305:                        }
                   1306:                        add_certificate_file(options, arg,
                   1307:                            flags & SSHCONF_USERCONF);
                   1308:                }
                   1309:                break;
                   1310:
1.1       christos 1311:        case oXAuthLocation:
                   1312:                charptr=&options->xauth_location;
                   1313:                goto parse_string;
                   1314:
                   1315:        case oUser:
                   1316:                charptr = &options->user;
                   1317: parse_string:
1.35      christos 1318:                arg = argv_next(&ac, &av);
1.33      christos 1319:                if (!arg || *arg == '\0') {
                   1320:                        error("%.200s line %d: Missing argument.",
1.6       christos 1321:                            filename, linenum);
1.35      christos 1322:                        goto out;
1.33      christos 1323:                }
1.1       christos 1324:                if (*activep && *charptr == NULL)
                   1325:                        *charptr = xstrdup(arg);
                   1326:                break;
                   1327:
                   1328:        case oGlobalKnownHostsFile:
1.6       christos 1329:                cpptr = (char **)&options->system_hostfiles;
                   1330:                uintptr = &options->num_system_hostfiles;
                   1331:                max_entries = SSH_MAX_HOSTS_FILES;
                   1332: parse_char_array:
1.35      christos 1333:                i = 0;
                   1334:                value = *uintptr == 0; /* was array empty when we started? */
                   1335:                while ((arg = argv_next(&ac, &av)) != NULL) {
                   1336:                        if (*arg == '\0') {
                   1337:                                error("%s line %d: keyword %s empty argument",
                   1338:                                    filename, linenum, keyword);
                   1339:                                goto out;
                   1340:                        }
                   1341:                        /* Allow "none" only in first position */
                   1342:                        if (strcasecmp(arg, "none") == 0) {
                   1343:                                if (i > 0 || ac > 0) {
                   1344:                                        error("%s line %d: keyword %s \"none\" "
                   1345:                                            "argument must appear alone.",
                   1346:                                            filename, linenum, keyword);
                   1347:                                        goto out;
                   1348:                                }
                   1349:                        }
                   1350:                        i++;
                   1351:                        if (*activep && value) {
1.33      christos 1352:                                if ((*uintptr) >= max_entries) {
1.35      christos 1353:                                        error("%s line %d: too many %s "
                   1354:                                            "entries.", filename, linenum,
                   1355:                                            keyword);
                   1356:                                        goto out;
1.33      christos 1357:                                }
1.6       christos 1358:                                cpptr[(*uintptr)++] = xstrdup(arg);
                   1359:                        }
                   1360:                }
1.35      christos 1361:                break;
1.1       christos 1362:
                   1363:        case oUserKnownHostsFile:
1.6       christos 1364:                cpptr = (char **)&options->user_hostfiles;
                   1365:                uintptr = &options->num_user_hostfiles;
                   1366:                max_entries = SSH_MAX_HOSTS_FILES;
                   1367:                goto parse_char_array;
1.1       christos 1368:
1.28      christos 1369:        case oHostname:
1.1       christos 1370:                charptr = &options->hostname;
                   1371:                goto parse_string;
                   1372:
                   1373:        case oHostKeyAlias:
                   1374:                charptr = &options->host_key_alias;
                   1375:                goto parse_string;
                   1376:
                   1377:        case oPreferredAuthentications:
                   1378:                charptr = &options->preferred_authentications;
                   1379:                goto parse_string;
                   1380:
                   1381:        case oBindAddress:
                   1382:                charptr = &options->bind_address;
                   1383:                goto parse_string;
                   1384:
1.23      christos 1385:        case oBindInterface:
                   1386:                charptr = &options->bind_interface;
                   1387:                goto parse_string;
                   1388:
1.4       adam     1389:        case oPKCS11Provider:
                   1390:                charptr = &options->pkcs11_provider;
1.1       christos 1391:                goto parse_string;
                   1392:
1.29      christos 1393:        case oSecurityKeyProvider:
                   1394:                charptr = &options->sk_provider;
                   1395:                goto parse_string;
                   1396:
1.33      christos 1397:        case oKnownHostsCommand:
                   1398:                charptr = &options->known_hosts_command;
                   1399:                goto parse_command;
                   1400:
1.1       christos 1401:        case oProxyCommand:
                   1402:                charptr = &options->proxy_command;
1.19      christos 1403:                /* Ignore ProxyCommand if ProxyJump already specified */
                   1404:                if (options->jump_host != NULL)
                   1405:                        charptr = &options->jump_host; /* Skip below */
1.1       christos 1406: parse_command:
1.35      christos 1407:                if (str == NULL) {
1.33      christos 1408:                        error("%.200s line %d: Missing argument.",
                   1409:                            filename, linenum);
1.35      christos 1410:                        goto out;
1.33      christos 1411:                }
1.35      christos 1412:                len = strspn(str, WHITESPACE "=");
1.1       christos 1413:                if (*activep && *charptr == NULL)
1.35      christos 1414:                        *charptr = xstrdup(str + len);
                   1415:                argv_consume(&ac);
                   1416:                break;
1.1       christos 1417:
1.19      christos 1418:        case oProxyJump:
1.35      christos 1419:                if (str == NULL) {
1.33      christos 1420:                        error("%.200s line %d: Missing argument.",
1.19      christos 1421:                            filename, linenum);
1.35      christos 1422:                        goto out;
1.19      christos 1423:                }
1.35      christos 1424:                len = strspn(str, WHITESPACE "=");
                   1425:                /* XXX use argv? */
                   1426:                if (parse_jump(str + len, options, *activep) == -1) {
1.33      christos 1427:                        error("%.200s line %d: Invalid ProxyJump \"%s\"",
1.35      christos 1428:                            filename, linenum, str + len);
                   1429:                        goto out;
1.19      christos 1430:                }
1.35      christos 1431:                argv_consume(&ac);
                   1432:                break;
1.19      christos 1433:
1.1       christos 1434:        case oPort:
1.35      christos 1435:                arg = argv_next(&ac, &av);
1.33      christos 1436:                if (!arg || *arg == '\0') {
                   1437:                        error("%.200s line %d: Missing argument.",
1.27      christos 1438:                            filename, linenum);
1.35      christos 1439:                        goto out;
1.33      christos 1440:                }
1.27      christos 1441:                value = a2port(arg);
1.33      christos 1442:                if (value <= 0) {
                   1443:                        error("%.200s line %d: Bad port '%s'.",
1.27      christos 1444:                            filename, linenum, arg);
1.35      christos 1445:                        goto out;
1.33      christos 1446:                }
1.27      christos 1447:                if (*activep && options->port == -1)
                   1448:                        options->port = value;
                   1449:                break;
                   1450:
                   1451:        case oConnectionAttempts:
                   1452:                intptr = &options->connection_attempts;
1.1       christos 1453: parse_int:
1.35      christos 1454:                arg = argv_next(&ac, &av);
1.33      christos 1455:                if ((errstr = atoi_err(arg, &value)) != NULL) {
                   1456:                        error("%s line %d: integer value %s.",
1.23      christos 1457:                            filename, linenum, errstr);
1.35      christos 1458:                        goto out;
1.33      christos 1459:                }
1.1       christos 1460:                if (*activep && *intptr == -1)
                   1461:                        *intptr = value;
                   1462:                break;
                   1463:
1.2       christos 1464:        case oTcpRcvBuf:
                   1465:                intptr = &options->tcp_rcv_buf;
                   1466:                goto parse_int;
                   1467:
1.1       christos 1468:        case oCiphers:
1.35      christos 1469:                arg = argv_next(&ac, &av);
1.33      christos 1470:                if (!arg || *arg == '\0') {
                   1471:                        error("%.200s line %d: Missing argument.",
                   1472:                            filename, linenum);
1.35      christos 1473:                        goto out;
1.33      christos 1474:                }
1.28      christos 1475:                if (*arg != '-' &&
1.33      christos 1476:                    !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg)){
                   1477:                        error("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.1       christos 1478:                            filename, linenum, arg ? arg : "<NONE>");
1.35      christos 1479:                        goto out;
1.33      christos 1480:                }
1.1       christos 1481:                if (*activep && options->ciphers == NULL)
                   1482:                        options->ciphers = xstrdup(arg);
                   1483:                break;
                   1484:
                   1485:        case oMacs:
1.35      christos 1486:                arg = argv_next(&ac, &av);
1.33      christos 1487:                if (!arg || *arg == '\0') {
                   1488:                        error("%.200s line %d: Missing argument.",
                   1489:                            filename, linenum);
1.35      christos 1490:                        goto out;
1.33      christos 1491:                }
1.28      christos 1492:                if (*arg != '-' &&
1.33      christos 1493:                    !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg)) {
                   1494:                        error("%.200s line %d: Bad SSH2 MAC spec '%s'.",
1.1       christos 1495:                            filename, linenum, arg ? arg : "<NONE>");
1.35      christos 1496:                        goto out;
1.33      christos 1497:                }
1.1       christos 1498:                if (*activep && options->macs == NULL)
                   1499:                        options->macs = xstrdup(arg);
                   1500:                break;
                   1501:
1.5       christos 1502:        case oKexAlgorithms:
1.35      christos 1503:                arg = argv_next(&ac, &av);
1.33      christos 1504:                if (!arg || *arg == '\0') {
                   1505:                        error("%.200s line %d: Missing argument.",
1.5       christos 1506:                            filename, linenum);
1.35      christos 1507:                        goto out;
1.33      christos 1508:                }
1.21      christos 1509:                if (*arg != '-' &&
1.28      christos 1510:                    !kex_names_valid(*arg == '+' || *arg == '^' ?
1.33      christos 1511:                    arg + 1 : arg)) {
                   1512:                        error("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1.5       christos 1513:                            filename, linenum, arg ? arg : "<NONE>");
1.35      christos 1514:                        goto out;
1.33      christos 1515:                }
1.5       christos 1516:                if (*activep && options->kex_algorithms == NULL)
                   1517:                        options->kex_algorithms = xstrdup(arg);
                   1518:                break;
                   1519:
1.1       christos 1520:        case oHostKeyAlgorithms:
1.16      christos 1521:                charptr = &options->hostkeyalgorithms;
1.33      christos 1522: parse_pubkey_algos:
1.35      christos 1523:                arg = argv_next(&ac, &av);
1.33      christos 1524:                if (!arg || *arg == '\0') {
                   1525:                        error("%.200s line %d: Missing argument.",
1.16      christos 1526:                            filename, linenum);
1.35      christos 1527:                        goto out;
1.33      christos 1528:                }
1.21      christos 1529:                if (*arg != '-' &&
1.28      christos 1530:                    !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1.33      christos 1531:                    arg + 1 : arg, 1)) {
                   1532:                        error("%s line %d: Bad key types '%s'.",
                   1533:                            filename, linenum, arg ? arg : "<NONE>");
1.35      christos 1534:                        goto out;
1.33      christos 1535:                }
1.16      christos 1536:                if (*activep && *charptr == NULL)
                   1537:                        *charptr = xstrdup(arg);
1.1       christos 1538:                break;
                   1539:
1.27      christos 1540:        case oCASignatureAlgorithms:
                   1541:                charptr = &options->ca_sign_algorithms;
1.33      christos 1542:                goto parse_pubkey_algos;
1.27      christos 1543:
1.1       christos 1544:        case oLogLevel:
                   1545:                log_level_ptr = &options->log_level;
1.35      christos 1546:                arg = argv_next(&ac, &av);
1.1       christos 1547:                value = log_level_number(arg);
1.33      christos 1548:                if (value == SYSLOG_LEVEL_NOT_SET) {
                   1549:                        error("%.200s line %d: unsupported log level '%s'",
1.1       christos 1550:                            filename, linenum, arg ? arg : "<NONE>");
1.35      christos 1551:                        goto out;
1.33      christos 1552:                }
1.1       christos 1553:                if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
                   1554:                        *log_level_ptr = (LogLevel) value;
                   1555:                break;
                   1556:
1.22      christos 1557:        case oLogFacility:
                   1558:                log_facility_ptr = &options->log_facility;
1.35      christos 1559:                arg = argv_next(&ac, &av);
1.22      christos 1560:                value = log_facility_number(arg);
1.33      christos 1561:                if (value == SYSLOG_FACILITY_NOT_SET) {
                   1562:                        error("%.200s line %d: unsupported log facility '%s'",
1.22      christos 1563:                            filename, linenum, arg ? arg : "<NONE>");
1.35      christos 1564:                        goto out;
1.33      christos 1565:                }
1.22      christos 1566:                if (*log_facility_ptr == -1)
                   1567:                        *log_facility_ptr = (SyslogFacility) value;
                   1568:                break;
                   1569:
1.33      christos 1570:        case oLogVerbose:
                   1571:                cppptr = &options->log_verbose;
                   1572:                uintptr = &options->num_log_verbose;
1.35      christos 1573:                i = 0;
                   1574:                while ((arg = argv_next(&ac, &av)) != NULL) {
                   1575:                        if (*arg == '\0') {
                   1576:                                error("%s line %d: keyword %s empty argument",
                   1577:                                    filename, linenum, keyword);
                   1578:                                goto out;
                   1579:                        }
                   1580:                        /* Allow "none" only in first position */
                   1581:                        if (strcasecmp(arg, "none") == 0) {
                   1582:                                if (i > 0 || ac > 0) {
                   1583:                                        error("%s line %d: keyword %s \"none\" "
                   1584:                                            "argument must appear alone.",
                   1585:                                            filename, linenum, keyword);
                   1586:                                        goto out;
                   1587:                                }
                   1588:                        }
                   1589:                        i++;
                   1590:                        if (*activep && *uintptr == 0) {
1.33      christos 1591:                                *cppptr = xrecallocarray(*cppptr, *uintptr,
                   1592:                                    *uintptr + 1, sizeof(**cppptr));
                   1593:                                (*cppptr)[(*uintptr)++] = xstrdup(arg);
                   1594:                        }
                   1595:                }
1.35      christos 1596:                break;
1.33      christos 1597:
1.1       christos 1598:        case oLocalForward:
                   1599:        case oRemoteForward:
                   1600:        case oDynamicForward:
1.35      christos 1601:                arg = argv_next(&ac, &av);
1.33      christos 1602:                if (!arg || *arg == '\0') {
                   1603:                        error("%.200s line %d: Missing argument.",
1.1       christos 1604:                            filename, linenum);
1.35      christos 1605:                        goto out;
1.33      christos 1606:                }
1.1       christos 1607:
1.22      christos 1608:                remotefwd = (opcode == oRemoteForward);
                   1609:                dynamicfwd = (opcode == oDynamicForward);
                   1610:
                   1611:                if (!dynamicfwd) {
1.35      christos 1612:                        arg2 = argv_next(&ac, &av);
1.22      christos 1613:                        if (arg2 == NULL || *arg2 == '\0') {
                   1614:                                if (remotefwd)
                   1615:                                        dynamicfwd = 1;
1.33      christos 1616:                                else {
                   1617:                                        error("%.200s line %d: Missing target "
1.22      christos 1618:                                            "argument.", filename, linenum);
1.35      christos 1619:                                        goto out;
1.33      christos 1620:                                }
1.22      christos 1621:                        } else {
                   1622:                                /* construct a string for parse_forward */
                   1623:                                snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
                   1624:                                    arg2);
                   1625:                        }
                   1626:                }
                   1627:                if (dynamicfwd)
1.1       christos 1628:                        strlcpy(fwdarg, arg, sizeof(fwdarg));
                   1629:
1.33      christos 1630:                if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0) {
                   1631:                        error("%.200s line %d: Bad forwarding specification.",
1.1       christos 1632:                            filename, linenum);
1.35      christos 1633:                        goto out;
1.33      christos 1634:                }
1.1       christos 1635:
                   1636:                if (*activep) {
1.22      christos 1637:                        if (remotefwd) {
                   1638:                                add_remote_forward(options, &fwd);
                   1639:                        } else {
1.1       christos 1640:                                add_local_forward(options, &fwd);
1.22      christos 1641:                        }
1.1       christos 1642:                }
                   1643:                break;
                   1644:
1.33      christos 1645:        case oPermitRemoteOpen:
                   1646:                uintptr = &options->num_permitted_remote_opens;
                   1647:                cppptr = &options->permitted_remote_opens;
1.35      christos 1648:                arg = argv_next(&ac, &av);
1.33      christos 1649:                if (!arg || *arg == '\0')
                   1650:                        fatal("%s line %d: missing %s specification",
                   1651:                            filename, linenum, lookup_opcode_name(opcode));
                   1652:                uvalue = *uintptr;      /* modified later */
                   1653:                if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
                   1654:                        if (*activep && uvalue == 0) {
                   1655:                                *uintptr = 1;
                   1656:                                *cppptr = xcalloc(1, sizeof(**cppptr));
                   1657:                                (*cppptr)[0] = xstrdup(arg);
                   1658:                        }
                   1659:                        break;
                   1660:                }
1.35      christos 1661:                while ((arg = argv_next(&ac, &av)) != NULL) {
1.33      christos 1662:                        arg2 = xstrdup(arg);
                   1663:                        ch = '\0';
                   1664:                        p = hpdelim2(&arg, &ch);
                   1665:                        if (p == NULL || ch == '/') {
                   1666:                                fatal("%s line %d: missing host in %s",
                   1667:                                    filename, linenum,
                   1668:                                    lookup_opcode_name(opcode));
                   1669:                        }
                   1670:                        p = cleanhostname(p);
                   1671:                        /*
                   1672:                         * don't want to use permitopen_port to avoid
                   1673:                         * dependency on channels.[ch] here.
                   1674:                         */
                   1675:                        if (arg == NULL ||
                   1676:                            (strcmp(arg, "*") != 0 && a2port(arg) <= 0)) {
                   1677:                                fatal("%s line %d: bad port number in %s",
                   1678:                                    filename, linenum,
                   1679:                                    lookup_opcode_name(opcode));
                   1680:                        }
                   1681:                        if (*activep && uvalue == 0) {
                   1682:                                opt_array_append(filename, linenum,
                   1683:                                    lookup_opcode_name(opcode),
                   1684:                                    cppptr, uintptr, arg2);
                   1685:                        }
                   1686:                        free(arg2);
                   1687:                }
                   1688:                break;
                   1689:
1.1       christos 1690:        case oClearAllForwardings:
                   1691:                intptr = &options->clear_forwardings;
                   1692:                goto parse_flag;
                   1693:
                   1694:        case oHost:
1.33      christos 1695:                if (cmdline) {
                   1696:                        error("Host directive not supported as a command-line "
1.12      christos 1697:                            "option");
1.35      christos 1698:                        goto out;
1.33      christos 1699:                }
1.1       christos 1700:                *activep = 0;
1.6       christos 1701:                arg2 = NULL;
1.35      christos 1702:                while ((arg = argv_next(&ac, &av)) != NULL) {
                   1703:                        if (*arg == '\0') {
                   1704:                                error("%s line %d: keyword %s empty argument",
                   1705:                                    filename, linenum, keyword);
                   1706:                                goto out;
                   1707:                        }
                   1708:                        if ((flags & SSHCONF_NEVERMATCH) != 0) {
                   1709:                                argv_consume(&ac);
1.19      christos 1710:                                break;
1.35      christos 1711:                        }
1.6       christos 1712:                        negated = *arg == '!';
                   1713:                        if (negated)
                   1714:                                arg++;
1.1       christos 1715:                        if (match_pattern(host, arg)) {
1.6       christos 1716:                                if (negated) {
                   1717:                                        debug("%.200s line %d: Skipping Host "
                   1718:                                            "block because of negated match "
                   1719:                                            "for %.100s", filename, linenum,
                   1720:                                            arg);
                   1721:                                        *activep = 0;
1.35      christos 1722:                                        argv_consume(&ac);
1.6       christos 1723:                                        break;
                   1724:                                }
                   1725:                                if (!*activep)
                   1726:                                        arg2 = arg; /* logged below */
1.1       christos 1727:                                *activep = 1;
                   1728:                        }
1.6       christos 1729:                }
                   1730:                if (*activep)
                   1731:                        debug("%.200s line %d: Applying options for %.100s",
                   1732:                            filename, linenum, arg2);
1.35      christos 1733:                break;
1.1       christos 1734:
1.12      christos 1735:        case oMatch:
1.33      christos 1736:                if (cmdline) {
                   1737:                        error("Host directive not supported as a command-line "
1.12      christos 1738:                            "option");
1.35      christos 1739:                        goto out;
1.33      christos 1740:                }
1.35      christos 1741:                value = match_cfg_line(options, &str, pw, host, original_host,
1.27      christos 1742:                    flags & SSHCONF_FINAL, want_final_pass,
                   1743:                    filename, linenum);
1.33      christos 1744:                if (value < 0) {
                   1745:                        error("%.200s line %d: Bad Match condition", filename,
1.12      christos 1746:                            linenum);
1.35      christos 1747:                        goto out;
1.33      christos 1748:                }
1.19      christos 1749:                *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.35      christos 1750:                /*
                   1751:                 * If match_cfg_line() didn't consume all its arguments then
                   1752:                 * arrange for the extra arguments check below to fail.
                   1753:                 */
                   1754:
                   1755:                if (str == NULL || *str == '\0')
                   1756:                        argv_consume(&ac);
1.12      christos 1757:                break;
                   1758:
1.1       christos 1759:        case oEscapeChar:
                   1760:                intptr = &options->escape_char;
1.35      christos 1761:                arg = argv_next(&ac, &av);
1.33      christos 1762:                if (!arg || *arg == '\0') {
                   1763:                        error("%.200s line %d: Missing argument.",
                   1764:                            filename, linenum);
1.35      christos 1765:                        goto out;
1.33      christos 1766:                }
1.14      christos 1767:                if (strcmp(arg, "none") == 0)
                   1768:                        value = SSH_ESCAPECHAR_NONE;
                   1769:                else if (arg[1] == '\0')
                   1770:                        value = (u_char) arg[0];
                   1771:                else if (arg[0] == '^' && arg[2] == 0 &&
1.1       christos 1772:                    (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
                   1773:                        value = (u_char) arg[1] & 31;
                   1774:                else {
1.33      christos 1775:                        error("%.200s line %d: Bad escape character.",
1.1       christos 1776:                            filename, linenum);
1.35      christos 1777:                        goto out;
1.1       christos 1778:                }
                   1779:                if (*activep && *intptr == -1)
                   1780:                        *intptr = value;
                   1781:                break;
                   1782:
                   1783:        case oAddressFamily:
                   1784:                intptr = &options->address_family;
1.12      christos 1785:                multistate_ptr = multistate_addressfamily;
                   1786:                goto parse_multistate;
1.1       christos 1787:
                   1788:        case oEnableSSHKeysign:
                   1789:                intptr = &options->enable_ssh_keysign;
                   1790:                goto parse_flag;
                   1791:
                   1792:        case oIdentitiesOnly:
                   1793:                intptr = &options->identities_only;
                   1794:                goto parse_flag;
                   1795:
                   1796:        case oServerAliveInterval:
                   1797:                intptr = &options->server_alive_interval;
                   1798:                goto parse_time;
                   1799:
                   1800:        case oServerAliveCountMax:
                   1801:                intptr = &options->server_alive_count_max;
                   1802:                goto parse_int;
                   1803:
                   1804:        case oSendEnv:
1.35      christos 1805:                while ((arg = argv_next(&ac, &av)) != NULL) {
                   1806:                        if (*arg == '\0' || strchr(arg, '=') != NULL) {
1.33      christos 1807:                                error("%s line %d: Invalid environment name.",
1.1       christos 1808:                                    filename, linenum);
1.35      christos 1809:                                goto out;
1.33      christos 1810:                        }
1.1       christos 1811:                        if (!*activep)
                   1812:                                continue;
1.25      christos 1813:                        if (*arg == '-') {
                   1814:                                /* Removing an env var */
                   1815:                                rm_env(options, arg, filename, linenum);
                   1816:                                continue;
                   1817:                        } else {
                   1818:                                /* Adding an env var */
1.33      christos 1819:                                if (options->num_send_env >= INT_MAX) {
                   1820:                                        error("%s line %d: too many send env.",
1.25      christos 1821:                                            filename, linenum);
1.35      christos 1822:                                        goto out;
1.33      christos 1823:                                }
1.25      christos 1824:                                options->send_env = xrecallocarray(
                   1825:                                    options->send_env, options->num_send_env,
                   1826:                                    options->num_send_env + 1,
                   1827:                                    sizeof(*options->send_env));
                   1828:                                options->send_env[options->num_send_env++] =
                   1829:                                    xstrdup(arg);
                   1830:                        }
                   1831:                }
                   1832:                break;
                   1833:
                   1834:        case oSetEnv:
                   1835:                value = options->num_setenv;
1.35      christos 1836:                while ((arg = argv_next(&ac, &av)) != NULL) {
1.33      christos 1837:                        if (strchr(arg, '=') == NULL) {
                   1838:                                error("%s line %d: Invalid SetEnv.",
1.25      christos 1839:                                    filename, linenum);
1.35      christos 1840:                                goto out;
1.33      christos 1841:                        }
1.25      christos 1842:                        if (!*activep || value != 0)
                   1843:                                continue;
                   1844:                        /* Adding a setenv var */
1.33      christos 1845:                        if (options->num_setenv >= INT_MAX) {
                   1846:                                error("%s line %d: too many SetEnv.",
1.1       christos 1847:                                    filename, linenum);
1.35      christos 1848:                                goto out;
1.33      christos 1849:                        }
1.25      christos 1850:                        options->setenv = xrecallocarray(
                   1851:                            options->setenv, options->num_setenv,
                   1852:                            options->num_setenv + 1, sizeof(*options->setenv));
                   1853:                        options->setenv[options->num_setenv++] = xstrdup(arg);
1.1       christos 1854:                }
                   1855:                break;
                   1856:
                   1857:        case oControlPath:
                   1858:                charptr = &options->control_path;
                   1859:                goto parse_string;
                   1860:
                   1861:        case oControlMaster:
                   1862:                intptr = &options->control_master;
1.12      christos 1863:                multistate_ptr = multistate_controlmaster;
                   1864:                goto parse_multistate;
1.1       christos 1865:
1.4       adam     1866:        case oControlPersist:
                   1867:                /* no/false/yes/true, or a time spec */
                   1868:                intptr = &options->control_persist;
1.35      christos 1869:                arg = argv_next(&ac, &av);
1.33      christos 1870:                if (!arg || *arg == '\0') {
                   1871:                        error("%.200s line %d: Missing ControlPersist"
1.4       adam     1872:                            " argument.", filename, linenum);
1.35      christos 1873:                        goto out;
1.33      christos 1874:                }
1.4       adam     1875:                value = 0;
                   1876:                value2 = 0;     /* timeout */
                   1877:                if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
                   1878:                        value = 0;
                   1879:                else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
                   1880:                        value = 1;
                   1881:                else if ((value2 = convtime(arg)) >= 0)
                   1882:                        value = 1;
1.33      christos 1883:                else {
                   1884:                        error("%.200s line %d: Bad ControlPersist argument.",
1.4       adam     1885:                            filename, linenum);
1.35      christos 1886:                        goto out;
1.33      christos 1887:                }
1.4       adam     1888:                if (*activep && *intptr == -1) {
                   1889:                        *intptr = value;
                   1890:                        options->control_persist_timeout = value2;
                   1891:                }
                   1892:                break;
                   1893:
1.1       christos 1894:        case oHashKnownHosts:
                   1895:                intptr = &options->hash_known_hosts;
                   1896:                goto parse_flag;
                   1897:
                   1898:        case oTunnel:
                   1899:                intptr = &options->tun_open;
1.12      christos 1900:                multistate_ptr = multistate_tunnel;
                   1901:                goto parse_multistate;
1.1       christos 1902:
                   1903:        case oTunnelDevice:
1.35      christos 1904:                arg = argv_next(&ac, &av);
1.33      christos 1905:                if (!arg || *arg == '\0') {
                   1906:                        error("%.200s line %d: Missing argument.",
                   1907:                            filename, linenum);
1.35      christos 1908:                        goto out;
1.33      christos 1909:                }
1.1       christos 1910:                value = a2tun(arg, &value2);
1.33      christos 1911:                if (value == SSH_TUNID_ERR) {
                   1912:                        error("%.200s line %d: Bad tun device.",
                   1913:                            filename, linenum);
1.35      christos 1914:                        goto out;
1.33      christos 1915:                }
1.35      christos 1916:                if (*activep && options->tun_local == -1) {
1.1       christos 1917:                        options->tun_local = value;
                   1918:                        options->tun_remote = value2;
                   1919:                }
                   1920:                break;
                   1921:
                   1922:        case oLocalCommand:
                   1923:                charptr = &options->local_command;
                   1924:                goto parse_command;
                   1925:
                   1926:        case oPermitLocalCommand:
                   1927:                intptr = &options->permit_local_command;
                   1928:                goto parse_flag;
                   1929:
1.22      christos 1930:        case oRemoteCommand:
                   1931:                charptr = &options->remote_command;
                   1932:                goto parse_command;
                   1933:
1.1       christos 1934:        case oVisualHostKey:
                   1935:                intptr = &options->visual_host_key;
                   1936:                goto parse_flag;
                   1937:
1.19      christos 1938:        case oInclude:
1.33      christos 1939:                if (cmdline) {
                   1940:                        error("Include directive not supported as a "
1.19      christos 1941:                            "command-line option");
1.35      christos 1942:                        goto out;
1.33      christos 1943:                }
1.19      christos 1944:                value = 0;
1.35      christos 1945:                while ((arg = argv_next(&ac, &av)) != NULL) {
                   1946:                        if (*arg == '\0') {
                   1947:                                error("%s line %d: keyword %s empty argument",
                   1948:                                    filename, linenum, keyword);
                   1949:                                goto out;
                   1950:                        }
1.19      christos 1951:                        /*
                   1952:                         * Ensure all paths are anchored. User configuration
                   1953:                         * files may begin with '~/' but system configurations
                   1954:                         * must not. If the path is relative, then treat it
                   1955:                         * as living in ~/.ssh for user configurations or
                   1956:                         * /etc/ssh for system ones.
                   1957:                         */
1.33      christos 1958:                        if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0) {
                   1959:                                error("%.200s line %d: bad include path %s.",
1.19      christos 1960:                                    filename, linenum, arg);
1.35      christos 1961:                                goto out;
1.33      christos 1962:                        }
1.27      christos 1963:                        if (!path_absolute(arg) && *arg != '~') {
1.19      christos 1964:                                xasprintf(&arg2, "%s/%s",
                   1965:                                    (flags & SSHCONF_USERCONF) ?
                   1966:                                    "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
                   1967:                        } else
                   1968:                                arg2 = xstrdup(arg);
                   1969:                        memset(&gl, 0, sizeof(gl));
                   1970:                        r = glob(arg2, GLOB_TILDE | GLOB_LIMIT, NULL, &gl);
                   1971:                        if (r == GLOB_NOMATCH) {
                   1972:                                debug("%.200s line %d: include %s matched no "
                   1973:                                    "files",filename, linenum, arg2);
1.21      christos 1974:                                free(arg2);
1.19      christos 1975:                                continue;
1.33      christos 1976:                        } else if (r != 0) {
                   1977:                                error("%.200s line %d: glob failed for %s.",
1.19      christos 1978:                                    filename, linenum, arg2);
1.35      christos 1979:                                goto out;
1.33      christos 1980:                        }
1.19      christos 1981:                        free(arg2);
                   1982:                        oactive = *activep;
1.29      christos 1983:                        for (i = 0; i < gl.gl_pathc; i++) {
1.19      christos 1984:                                debug3("%.200s line %d: Including file %s "
                   1985:                                    "depth %d%s", filename, linenum,
                   1986:                                    gl.gl_pathv[i], depth,
                   1987:                                    oactive ? "" : " (parse only)");
                   1988:                                r = read_config_file_depth(gl.gl_pathv[i],
                   1989:                                    pw, host, original_host, options,
                   1990:                                    flags | SSHCONF_CHECKPERM |
                   1991:                                    (oactive ? 0 : SSHCONF_NEVERMATCH),
1.27      christos 1992:                                    activep, want_final_pass, depth + 1);
1.21      christos 1993:                                if (r != 1 && errno != ENOENT) {
1.33      christos 1994:                                        error("Can't open user config file "
1.21      christos 1995:                                            "%.100s: %.100s", gl.gl_pathv[i],
                   1996:                                            strerror(errno));
1.33      christos 1997:                                        globfree(&gl);
1.35      christos 1998:                                        goto out;
1.21      christos 1999:                                }
1.19      christos 2000:                                /*
                   2001:                                 * don't let Match in includes clobber the
                   2002:                                 * containing file's Match state.
                   2003:                                 */
                   2004:                                *activep = oactive;
                   2005:                                if (r != 1)
                   2006:                                        value = -1;
                   2007:                        }
                   2008:                        globfree(&gl);
                   2009:                }
                   2010:                if (value != 0)
1.35      christos 2011:                        ret = value;
1.19      christos 2012:                break;
                   2013:
1.5       christos 2014:        case oIPQoS:
1.35      christos 2015:                arg = argv_next(&ac, &av);
1.33      christos 2016:                if ((value = parse_ipqos(arg)) == -1) {
                   2017:                        error("%s line %d: Bad IPQoS value: %s",
1.5       christos 2018:                            filename, linenum, arg);
1.35      christos 2019:                        goto out;
1.33      christos 2020:                }
1.35      christos 2021:                arg = argv_next(&ac, &av);
1.5       christos 2022:                if (arg == NULL)
                   2023:                        value2 = value;
1.33      christos 2024:                else if ((value2 = parse_ipqos(arg)) == -1) {
                   2025:                        error("%s line %d: Bad IPQoS value: %s",
1.5       christos 2026:                            filename, linenum, arg);
1.35      christos 2027:                        goto out;
1.33      christos 2028:                }
1.35      christos 2029:                if (*activep && options->ip_qos_interactive == -1) {
1.5       christos 2030:                        options->ip_qos_interactive = value;
                   2031:                        options->ip_qos_bulk = value2;
                   2032:                }
                   2033:                break;
                   2034:
1.6       christos 2035:        case oRequestTTY:
                   2036:                intptr = &options->request_tty;
1.12      christos 2037:                multistate_ptr = multistate_requesttty;
                   2038:                goto parse_multistate;
1.6       christos 2039:
1.7       tls      2040:        case oSendVersionFirst:
                   2041:                intptr = &options->send_version_first;
                   2042:                goto parse_flag;
                   2043:
1.35      christos 2044:        case oSessionType:
                   2045:                intptr = &options->session_type;
                   2046:                multistate_ptr = multistate_sessiontype;
                   2047:                goto parse_multistate;
                   2048:
                   2049:        case oStdinNull:
                   2050:                intptr = &options->stdin_null;
                   2051:                goto parse_flag;
                   2052:
                   2053:        case oForkAfterAuthentication:
                   2054:                intptr = &options->fork_after_authentication;
                   2055:                goto parse_flag;
                   2056:
1.11      christos 2057:        case oIgnoreUnknown:
                   2058:                charptr = &options->ignored_unknown;
                   2059:                goto parse_string;
                   2060:
1.12      christos 2061:        case oProxyUseFdpass:
                   2062:                intptr = &options->proxy_use_fdpass;
                   2063:                goto parse_flag;
                   2064:
                   2065:        case oCanonicalDomains:
                   2066:                value = options->num_canonical_domains != 0;
1.35      christos 2067:                i = 0;
                   2068:                while ((arg = argv_next(&ac, &av)) != NULL) {
                   2069:                        if (*arg == '\0') {
                   2070:                                error("%s line %d: keyword %s empty argument",
                   2071:                                    filename, linenum, keyword);
                   2072:                                goto out;
                   2073:                        }
                   2074:                        /* Allow "none" only in first position */
                   2075:                        if (strcasecmp(arg, "none") == 0) {
                   2076:                                if (i > 0 || ac > 0) {
                   2077:                                        error("%s line %d: keyword %s \"none\" "
                   2078:                                            "argument must appear alone.",
                   2079:                                            filename, linenum, keyword);
                   2080:                                        goto out;
                   2081:                                }
                   2082:                        }
                   2083:                        i++;
1.23      christos 2084:                        if (!valid_domain(arg, 1, &errstr)) {
1.33      christos 2085:                                error("%s line %d: %s", filename, linenum,
1.23      christos 2086:                                    errstr);
1.35      christos 2087:                                goto out;
1.23      christos 2088:                        }
1.12      christos 2089:                        if (!*activep || value)
                   2090:                                continue;
1.33      christos 2091:                        if (options->num_canonical_domains >=
                   2092:                            MAX_CANON_DOMAINS) {
                   2093:                                error("%s line %d: too many hostname suffixes.",
1.12      christos 2094:                                    filename, linenum);
1.35      christos 2095:                                goto out;
1.33      christos 2096:                        }
1.12      christos 2097:                        options->canonical_domains[
                   2098:                            options->num_canonical_domains++] = xstrdup(arg);
                   2099:                }
                   2100:                break;
                   2101:
                   2102:        case oCanonicalizePermittedCNAMEs:
                   2103:                value = options->num_permitted_cnames != 0;
1.37    ! christos 2104:                i = 0;
1.35      christos 2105:                while ((arg = argv_next(&ac, &av)) != NULL) {
1.37    ! christos 2106:                        char empty[] = "";
        !          2107:                        /*
        !          2108:                         * Either 'none' (only in first position), '*' for
        !          2109:                         * everything or 'list:list'
        !          2110:                         */
        !          2111:                        if (strcasecmp(arg, "none") == 0) {
        !          2112:                                if (i > 0 || ac > 0) {
        !          2113:                                        error("%s line %d: keyword %s \"none\" "
        !          2114:                                            "argument must appear alone.",
        !          2115:                                            filename, linenum, keyword);
        !          2116:                                        goto out;
        !          2117:                                }
        !          2118:                                arg2 = empty;
        !          2119:                        } else if (strcmp(arg, "*") == 0) {
1.12      christos 2120:                                arg2 = arg;
1.37    ! christos 2121:                        } else {
1.12      christos 2122:                                lowercase(arg);
                   2123:                                if ((arg2 = strchr(arg, ':')) == NULL ||
                   2124:                                    arg2[1] == '\0') {
1.33      christos 2125:                                        error("%s line %d: "
1.12      christos 2126:                                            "Invalid permitted CNAME \"%s\"",
                   2127:                                            filename, linenum, arg);
1.35      christos 2128:                                        goto out;
1.12      christos 2129:                                }
                   2130:                                *arg2 = '\0';
                   2131:                                arg2++;
                   2132:                        }
1.37    ! christos 2133:                        i++;
1.12      christos 2134:                        if (!*activep || value)
                   2135:                                continue;
1.33      christos 2136:                        if (options->num_permitted_cnames >=
                   2137:                            MAX_CANON_DOMAINS) {
                   2138:                                error("%s line %d: too many permitted CNAMEs.",
1.12      christos 2139:                                    filename, linenum);
1.35      christos 2140:                                goto out;
1.33      christos 2141:                        }
1.12      christos 2142:                        cname = options->permitted_cnames +
                   2143:                            options->num_permitted_cnames++;
                   2144:                        cname->source_list = xstrdup(arg);
                   2145:                        cname->target_list = xstrdup(arg2);
                   2146:                }
                   2147:                break;
                   2148:
                   2149:        case oCanonicalizeHostname:
                   2150:                intptr = &options->canonicalize_hostname;
                   2151:                multistate_ptr = multistate_canonicalizehostname;
                   2152:                goto parse_multistate;
                   2153:
                   2154:        case oCanonicalizeMaxDots:
                   2155:                intptr = &options->canonicalize_max_dots;
                   2156:                goto parse_int;
                   2157:
                   2158:        case oCanonicalizeFallbackLocal:
                   2159:                intptr = &options->canonicalize_fallback_local;
                   2160:                goto parse_flag;
                   2161:
                   2162:        case oStreamLocalBindMask:
1.35      christos 2163:                arg = argv_next(&ac, &av);
1.33      christos 2164:                if (!arg || *arg == '\0') {
                   2165:                        error("%.200s line %d: Missing StreamLocalBindMask "
                   2166:                            "argument.", filename, linenum);
1.35      christos 2167:                        goto out;
1.33      christos 2168:                }
1.12      christos 2169:                /* Parse mode in octal format */
                   2170:                value = strtol(arg, &endofnumber, 8);
1.33      christos 2171:                if (arg == endofnumber || value < 0 || value > 0777) {
                   2172:                        error("%.200s line %d: Bad mask.", filename, linenum);
1.35      christos 2173:                        goto out;
1.33      christos 2174:                }
1.12      christos 2175:                options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
                   2176:                break;
                   2177:
                   2178:        case oStreamLocalBindUnlink:
                   2179:                intptr = &options->fwd_opts.streamlocal_bind_unlink;
                   2180:                goto parse_flag;
                   2181:
1.13      christos 2182:        case oRevokedHostKeys:
                   2183:                charptr = &options->revoked_host_keys;
                   2184:                goto parse_string;
                   2185:
                   2186:        case oFingerprintHash:
                   2187:                intptr = &options->fingerprint_hash;
1.35      christos 2188:                arg = argv_next(&ac, &av);
1.33      christos 2189:                if (!arg || *arg == '\0') {
                   2190:                        error("%.200s line %d: Missing argument.",
1.13      christos 2191:                            filename, linenum);
1.35      christos 2192:                        goto out;
1.33      christos 2193:                }
                   2194:                if ((value = ssh_digest_alg_by_name(arg)) == -1) {
                   2195:                        error("%.200s line %d: Invalid hash algorithm \"%s\".",
1.13      christos 2196:                            filename, linenum, arg);
1.35      christos 2197:                        goto out;
1.33      christos 2198:                }
1.13      christos 2199:                if (*activep && *intptr == -1)
                   2200:                        *intptr = value;
                   2201:                break;
                   2202:
                   2203:        case oUpdateHostkeys:
                   2204:                intptr = &options->update_hostkeys;
                   2205:                multistate_ptr = multistate_yesnoask;
                   2206:                goto parse_multistate;
                   2207:
1.33      christos 2208:        case oHostbasedAcceptedAlgorithms:
                   2209:                charptr = &options->hostbased_accepted_algos;
                   2210:                goto parse_pubkey_algos;
                   2211:
                   2212:        case oPubkeyAcceptedAlgorithms:
                   2213:                charptr = &options->pubkey_accepted_algos;
                   2214:                goto parse_pubkey_algos;
1.13      christos 2215:
1.18      christos 2216:        case oAddKeysToAgent:
1.35      christos 2217:                arg = argv_next(&ac, &av);
                   2218:                arg2 = argv_next(&ac, &av);
1.32      christos 2219:                value = parse_multistate_value(arg, filename, linenum,
1.34      christos 2220:                    multistate_yesnoaskconfirm);
1.32      christos 2221:                value2 = 0; /* unlimited lifespan by default */
                   2222:                if (value == 3 && arg2 != NULL) {
                   2223:                        /* allow "AddKeysToAgent confirm 5m" */
1.33      christos 2224:                        if ((value2 = convtime(arg2)) == -1 ||
                   2225:                            value2 > INT_MAX) {
                   2226:                                error("%s line %d: invalid time value.",
1.32      christos 2227:                                    filename, linenum);
1.35      christos 2228:                                goto out;
1.33      christos 2229:                        }
1.32      christos 2230:                } else if (value == -1 && arg2 == NULL) {
1.33      christos 2231:                        if ((value2 = convtime(arg)) == -1 ||
                   2232:                            value2 > INT_MAX) {
                   2233:                                error("%s line %d: unsupported option",
1.32      christos 2234:                                    filename, linenum);
1.35      christos 2235:                                goto out;
1.33      christos 2236:                        }
1.32      christos 2237:                        value = 1; /* yes */
                   2238:                } else if (value == -1 || arg2 != NULL) {
1.33      christos 2239:                        error("%s line %d: unsupported option",
1.32      christos 2240:                            filename, linenum);
1.35      christos 2241:                        goto out;
1.32      christos 2242:                }
                   2243:                if (*activep && options->add_keys_to_agent == -1) {
                   2244:                        options->add_keys_to_agent = value;
                   2245:                        options->add_keys_to_agent_lifespan = value2;
                   2246:                }
                   2247:                break;
1.18      christos 2248:
1.19      christos 2249:        case oIdentityAgent:
                   2250:                charptr = &options->identity_agent;
1.35      christos 2251:                arg = argv_next(&ac, &av);
1.33      christos 2252:                if (!arg || *arg == '\0') {
                   2253:                        error("%.200s line %d: Missing argument.",
1.27      christos 2254:                            filename, linenum);
1.35      christos 2255:                        goto out;
1.33      christos 2256:                }
1.29      christos 2257:   parse_agent_path:
1.27      christos 2258:                /* Extra validation if the string represents an env var. */
1.33      christos 2259:                if ((arg2 = dollar_expand(&r, arg)) == NULL || r) {
                   2260:                        error("%.200s line %d: Invalid environment expansion "
1.32      christos 2261:                            "%s.", filename, linenum, arg);
1.35      christos 2262:                        goto out;
1.33      christos 2263:                }
1.32      christos 2264:                free(arg2);
                   2265:                /* check for legacy environment format */
1.33      christos 2266:                if (arg[0] == '$' && arg[1] != '{' &&
                   2267:                    !valid_env_name(arg + 1)) {
                   2268:                        error("%.200s line %d: Invalid environment name %s.",
1.27      christos 2269:                            filename, linenum, arg);
1.35      christos 2270:                        goto out;
1.27      christos 2271:                }
                   2272:                if (*activep && *charptr == NULL)
                   2273:                        *charptr = xstrdup(arg);
                   2274:                break;
1.19      christos 2275:
1.1       christos 2276:        case oDeprecated:
                   2277:                debug("%s line %d: Deprecated option \"%s\"",
                   2278:                    filename, linenum, keyword);
1.35      christos 2279:                argv_consume(&ac);
                   2280:                break;
1.1       christos 2281:
                   2282:        case oUnsupported:
                   2283:                error("%s line %d: Unsupported option \"%s\"",
                   2284:                    filename, linenum, keyword);
1.35      christos 2285:                argv_consume(&ac);
                   2286:                break;
1.1       christos 2287:
                   2288:        default:
1.33      christos 2289:                error("%s line %d: Unimplemented opcode %d",
                   2290:                    filename, linenum, opcode);
1.35      christos 2291:                goto out;
1.1       christos 2292:        }
                   2293:
                   2294:        /* Check that there is no garbage at end of line. */
1.35      christos 2295:        if (ac > 0) {
                   2296:                error("%.200s line %d: keyword %s extra arguments "
                   2297:                    "at end of line", filename, linenum, keyword);
                   2298:                goto out;
1.1       christos 2299:        }
1.35      christos 2300:
                   2301:        /* success */
                   2302:        ret = 0;
                   2303:  out:
                   2304:        argv_free(oav, oac);
                   2305:        return ret;
1.1       christos 2306: }
                   2307:
                   2308: /*
                   2309:  * Reads the config file and modifies the options accordingly.  Options
                   2310:  * should already be initialized before this call.  This never returns if
                   2311:  * there is an error.  If the file does not exist, this returns 0.
                   2312:  */
                   2313: int
1.12      christos 2314: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.27      christos 2315:     const char *original_host, Options *options, int flags,
                   2316:     int *want_final_pass)
1.1       christos 2317: {
1.19      christos 2318:        int active = 1;
                   2319:
                   2320:        return read_config_file_depth(filename, pw, host, original_host,
1.27      christos 2321:            options, flags, &active, want_final_pass, 0);
1.19      christos 2322: }
                   2323:
                   2324: #define READCONF_MAX_DEPTH     16
                   2325: static int
                   2326: read_config_file_depth(const char *filename, struct passwd *pw,
                   2327:     const char *host, const char *original_host, Options *options,
1.27      christos 2328:     int flags, int *activep, int *want_final_pass, int depth)
1.19      christos 2329: {
1.1       christos 2330:        FILE *f;
1.35      christos 2331:        char *line = NULL;
1.25      christos 2332:        size_t linesize = 0;
1.19      christos 2333:        int linenum;
1.1       christos 2334:        int bad_options = 0;
                   2335:
1.19      christos 2336:        if (depth < 0 || depth > READCONF_MAX_DEPTH)
                   2337:                fatal("Too many recursive configuration includes");
                   2338:
1.1       christos 2339:        if ((f = fopen(filename, "r")) == NULL)
                   2340:                return 0;
                   2341:
1.9       mlelstv  2342:        if (flags & SSHCONF_CHECKPERM) {
1.1       christos 2343:                struct stat sb;
                   2344:
                   2345:                if (fstat(fileno(f), &sb) == -1)
                   2346:                        fatal("fstat %s: %s", filename, strerror(errno));
                   2347:                if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
                   2348:                    (sb.st_mode & 022) != 0))
                   2349:                        fatal("Bad owner or permissions on %s", filename);
                   2350:        }
                   2351:
                   2352:        debug("Reading configuration data %.200s", filename);
                   2353:
                   2354:        /*
                   2355:         * Mark that we are now processing the options.  This flag is turned
                   2356:         * on/off by Host specifications.
                   2357:         */
                   2358:        linenum = 0;
1.25      christos 2359:        while (getline(&line, &linesize, f) != -1) {
1.1       christos 2360:                /* Update line number counter. */
                   2361:                linenum++;
1.33      christos 2362:                /*
                   2363:                 * Trim out comments and strip whitespace.
                   2364:                 * NB - preserve newlines, they are needed to reproduce
                   2365:                 * line numbers later for error messages.
                   2366:                 */
1.19      christos 2367:                if (process_config_line_depth(options, pw, host, original_host,
1.27      christos 2368:                    line, filename, linenum, activep, flags, want_final_pass,
                   2369:                    depth) != 0)
1.1       christos 2370:                        bad_options++;
                   2371:        }
1.25      christos 2372:        free(line);
1.1       christos 2373:        fclose(f);
                   2374:        if (bad_options > 0)
                   2375:                fatal("%s: terminating, %d bad configuration options",
                   2376:                    filename, bad_options);
                   2377:        return 1;
                   2378: }
                   2379:
1.12      christos 2380: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
                   2381: int
                   2382: option_clear_or_none(const char *o)
                   2383: {
                   2384:        return o == NULL || strcasecmp(o, "none") == 0;
                   2385: }
                   2386:
1.1       christos 2387: /*
1.37    ! christos 2388:  * Returns 1 if CanonicalizePermittedCNAMEs have been specified, 0 otherwise.
        !          2389:  * Allowed to be called on non-final configuration.
        !          2390:  */
        !          2391: int
        !          2392: config_has_permitted_cnames(Options *options)
        !          2393: {
        !          2394:        if (options->num_permitted_cnames == 1 &&
        !          2395:            strcasecmp(options->permitted_cnames[0].source_list, "none") == 0 &&
        !          2396:            strcmp(options->permitted_cnames[0].target_list, "") == 0)
        !          2397:                return 0;
        !          2398:        return options->num_permitted_cnames > 0;
        !          2399: }
        !          2400:
        !          2401: /*
1.1       christos 2402:  * Initializes options to special values that indicate that they have not yet
                   2403:  * been set.  Read_config_file will only set options with this value. Options
                   2404:  * are processed in the following order: command line, user config file,
                   2405:  * system config file.  Last, fill_default_options is called.
                   2406:  */
                   2407:
                   2408: void
                   2409: initialize_options(Options * options)
                   2410: {
                   2411:        memset(options, 'X', sizeof(*options));
                   2412:        options->forward_agent = -1;
1.29      christos 2413:        options->forward_agent_sock_path = NULL;
1.1       christos 2414:        options->forward_x11 = -1;
                   2415:        options->forward_x11_trusted = -1;
1.4       adam     2416:        options->forward_x11_timeout = -1;
1.19      christos 2417:        options->stdio_forward_host = NULL;
                   2418:        options->stdio_forward_port = 0;
                   2419:        options->clear_forwardings = -1;
1.1       christos 2420:        options->exit_on_forward_failure = -1;
                   2421:        options->xauth_location = NULL;
1.12      christos 2422:        options->fwd_opts.gateway_ports = -1;
                   2423:        options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
                   2424:        options->fwd_opts.streamlocal_bind_unlink = -1;
1.1       christos 2425:        options->pubkey_authentication = -1;
1.2       christos 2426: #if defined(KRB4) || defined(KRB5)
                   2427:        options->kerberos_authentication = -1;
                   2428: #endif
                   2429: #if defined(AFS) || defined(KRB5)
                   2430:        options->kerberos_tgt_passing = -1;
                   2431: #endif
                   2432: #ifdef AFS
                   2433:        options->afs_token_passing = -1;
                   2434: #endif
1.1       christos 2435:        options->gss_authentication = -1;
                   2436:        options->gss_deleg_creds = -1;
                   2437:        options->password_authentication = -1;
                   2438:        options->kbd_interactive_authentication = -1;
                   2439:        options->kbd_interactive_devices = NULL;
                   2440:        options->hostbased_authentication = -1;
                   2441:        options->batch_mode = -1;
                   2442:        options->check_host_ip = -1;
                   2443:        options->strict_host_key_checking = -1;
                   2444:        options->compression = -1;
                   2445:        options->tcp_keep_alive = -1;
                   2446:        options->port = -1;
                   2447:        options->address_family = -1;
                   2448:        options->connection_attempts = -1;
                   2449:        options->connection_timeout = -1;
                   2450:        options->number_of_password_prompts = -1;
                   2451:        options->ciphers = NULL;
                   2452:        options->macs = NULL;
1.5       christos 2453:        options->kex_algorithms = NULL;
1.1       christos 2454:        options->hostkeyalgorithms = NULL;
1.27      christos 2455:        options->ca_sign_algorithms = NULL;
1.1       christos 2456:        options->num_identity_files = 0;
1.33      christos 2457:        memset(options->identity_keys, 0, sizeof(options->identity_keys));
1.18      christos 2458:        options->num_certificate_files = 0;
1.33      christos 2459:        memset(options->certificates, 0, sizeof(options->certificates));
1.1       christos 2460:        options->hostname = NULL;
                   2461:        options->host_key_alias = NULL;
                   2462:        options->proxy_command = NULL;
1.19      christos 2463:        options->jump_user = NULL;
                   2464:        options->jump_host = NULL;
                   2465:        options->jump_port = -1;
                   2466:        options->jump_extra = NULL;
1.1       christos 2467:        options->user = NULL;
                   2468:        options->escape_char = -1;
1.6       christos 2469:        options->num_system_hostfiles = 0;
                   2470:        options->num_user_hostfiles = 0;
1.4       adam     2471:        options->local_forwards = NULL;
1.1       christos 2472:        options->num_local_forwards = 0;
1.4       adam     2473:        options->remote_forwards = NULL;
1.1       christos 2474:        options->num_remote_forwards = 0;
1.33      christos 2475:        options->permitted_remote_opens = NULL;
                   2476:        options->num_permitted_remote_opens = 0;
1.22      christos 2477:        options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.1       christos 2478:        options->log_level = SYSLOG_LEVEL_NOT_SET;
1.33      christos 2479:        options->num_log_verbose = 0;
                   2480:        options->log_verbose = NULL;
1.1       christos 2481:        options->preferred_authentications = NULL;
                   2482:        options->bind_address = NULL;
1.23      christos 2483:        options->bind_interface = NULL;
1.4       adam     2484:        options->pkcs11_provider = NULL;
1.29      christos 2485:        options->sk_provider = NULL;
1.1       christos 2486:        options->enable_ssh_keysign = - 1;
                   2487:        options->no_host_authentication_for_localhost = - 1;
                   2488:        options->identities_only = - 1;
                   2489:        options->rekey_limit = - 1;
1.11      christos 2490:        options->rekey_interval = -1;
1.1       christos 2491:        options->verify_host_key_dns = -1;
                   2492:        options->server_alive_interval = -1;
                   2493:        options->server_alive_count_max = -1;
1.25      christos 2494:        options->send_env = NULL;
1.1       christos 2495:        options->num_send_env = 0;
1.25      christos 2496:        options->setenv = NULL;
                   2497:        options->num_setenv = 0;
1.1       christos 2498:        options->control_path = NULL;
                   2499:        options->control_master = -1;
1.4       adam     2500:        options->control_persist = -1;
                   2501:        options->control_persist_timeout = 0;
1.1       christos 2502:        options->hash_known_hosts = -1;
                   2503:        options->tun_open = -1;
                   2504:        options->tun_local = -1;
                   2505:        options->tun_remote = -1;
                   2506:        options->local_command = NULL;
                   2507:        options->permit_local_command = -1;
1.22      christos 2508:        options->remote_command = NULL;
1.18      christos 2509:        options->add_keys_to_agent = -1;
1.32      christos 2510:        options->add_keys_to_agent_lifespan = -1;
1.19      christos 2511:        options->identity_agent = NULL;
1.1       christos 2512:        options->visual_host_key = -1;
1.5       christos 2513:        options->ip_qos_interactive = -1;
                   2514:        options->ip_qos_bulk = -1;
1.6       christos 2515:        options->request_tty = -1;
1.35      christos 2516:        options->session_type = -1;
                   2517:        options->stdin_null = -1;
                   2518:        options->fork_after_authentication = -1;
1.12      christos 2519:        options->proxy_use_fdpass = -1;
1.11      christos 2520:        options->ignored_unknown = NULL;
1.12      christos 2521:        options->num_canonical_domains = 0;
                   2522:        options->num_permitted_cnames = 0;
                   2523:        options->canonicalize_max_dots = -1;
                   2524:        options->canonicalize_fallback_local = -1;
                   2525:        options->canonicalize_hostname = -1;
1.13      christos 2526:        options->revoked_host_keys = NULL;
                   2527:        options->fingerprint_hash = -1;
                   2528:        options->update_hostkeys = -1;
1.33      christos 2529:        options->hostbased_accepted_algos = NULL;
                   2530:        options->pubkey_accepted_algos = NULL;
                   2531:        options->known_hosts_command = NULL;
1.2       christos 2532:        options->none_switch = -1;
                   2533:        options->none_enabled = -1;
                   2534:        options->hpn_disabled = -1;
                   2535:        options->hpn_buffer_size = -1;
                   2536:        options->tcp_rcv_buf_poll = -1;
                   2537:        options->tcp_rcv_buf = -1;
1.7       tls      2538:        options->send_version_first = -1;
1.1       christos 2539: }
                   2540:
                   2541: /*
1.12      christos 2542:  * A petite version of fill_default_options() that just fills the options
                   2543:  * needed for hostname canonicalization to proceed.
                   2544:  */
                   2545: void
                   2546: fill_default_options_for_canonicalization(Options *options)
                   2547: {
                   2548:        if (options->canonicalize_max_dots == -1)
                   2549:                options->canonicalize_max_dots = 1;
                   2550:        if (options->canonicalize_fallback_local == -1)
                   2551:                options->canonicalize_fallback_local = 1;
                   2552:        if (options->canonicalize_hostname == -1)
                   2553:                options->canonicalize_hostname = SSH_CANONICALISE_NO;
                   2554: }
                   2555:
                   2556: /*
1.1       christos 2557:  * Called after processing other sources of option data, this fills those
                   2558:  * options for which no value has been specified with their default values.
                   2559:  */
1.33      christos 2560: int
1.1       christos 2561: fill_default_options(Options * options)
                   2562: {
1.27      christos 2563:        char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
1.29      christos 2564:        char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
1.33      christos 2565:        int ret = 0, r;
1.25      christos 2566:
1.1       christos 2567:        if (options->forward_agent == -1)
                   2568:                options->forward_agent = 0;
                   2569:        if (options->forward_x11 == -1)
                   2570:                options->forward_x11 = 0;
                   2571:        if (options->forward_x11_trusted == -1)
                   2572:                options->forward_x11_trusted = 0;
1.4       adam     2573:        if (options->forward_x11_timeout == -1)
                   2574:                options->forward_x11_timeout = 1200;
1.19      christos 2575:        /*
                   2576:         * stdio forwarding (-W) changes the default for these but we defer
                   2577:         * setting the values so they can be overridden.
                   2578:         */
1.1       christos 2579:        if (options->exit_on_forward_failure == -1)
1.19      christos 2580:                options->exit_on_forward_failure =
                   2581:                    options->stdio_forward_host != NULL ? 1 : 0;
                   2582:        if (options->clear_forwardings == -1)
                   2583:                options->clear_forwardings =
                   2584:                    options->stdio_forward_host != NULL ? 1 : 0;
                   2585:        if (options->clear_forwardings == 1)
                   2586:                clear_forwardings(options);
                   2587:
1.1       christos 2588:        if (options->xauth_location == NULL)
1.33      christos 2589:                options->xauth_location = xstrdup(_PATH_XAUTH);
1.12      christos 2590:        if (options->fwd_opts.gateway_ports == -1)
                   2591:                options->fwd_opts.gateway_ports = 0;
                   2592:        if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
                   2593:                options->fwd_opts.streamlocal_bind_mask = 0177;
                   2594:        if (options->fwd_opts.streamlocal_bind_unlink == -1)
                   2595:                options->fwd_opts.streamlocal_bind_unlink = 0;
1.1       christos 2596:        if (options->pubkey_authentication == -1)
                   2597:                options->pubkey_authentication = 1;
1.2       christos 2598: #if defined(KRB4) || defined(KRB5)
                   2599:        if (options->kerberos_authentication == -1)
                   2600:                options->kerberos_authentication = 1;
                   2601: #endif
                   2602: #if defined(AFS) || defined(KRB5)
                   2603:        if (options->kerberos_tgt_passing == -1)
                   2604:                options->kerberos_tgt_passing = 1;
                   2605: #endif
                   2606: #ifdef AFS
                   2607:        if (options->afs_token_passing == -1)
                   2608:                options->afs_token_passing = 1;
                   2609: #endif
1.1       christos 2610:        if (options->gss_authentication == -1)
                   2611:                options->gss_authentication = 0;
                   2612:        if (options->gss_deleg_creds == -1)
                   2613:                options->gss_deleg_creds = 0;
                   2614:        if (options->password_authentication == -1)
                   2615:                options->password_authentication = 1;
                   2616:        if (options->kbd_interactive_authentication == -1)
                   2617:                options->kbd_interactive_authentication = 1;
                   2618:        if (options->hostbased_authentication == -1)
                   2619:                options->hostbased_authentication = 0;
                   2620:        if (options->batch_mode == -1)
                   2621:                options->batch_mode = 0;
                   2622:        if (options->check_host_ip == -1)
1.33      christos 2623:                options->check_host_ip = 0;
1.1       christos 2624:        if (options->strict_host_key_checking == -1)
1.22      christos 2625:                options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
1.1       christos 2626:        if (options->compression == -1)
                   2627:                options->compression = 0;
                   2628:        if (options->tcp_keep_alive == -1)
                   2629:                options->tcp_keep_alive = 1;
                   2630:        if (options->port == -1)
                   2631:                options->port = 0;      /* Filled in ssh_connect. */
                   2632:        if (options->address_family == -1)
                   2633:                options->address_family = AF_UNSPEC;
                   2634:        if (options->connection_attempts == -1)
                   2635:                options->connection_attempts = 1;
                   2636:        if (options->number_of_password_prompts == -1)
                   2637:                options->number_of_password_prompts = 3;
                   2638:        /* options->hostkeyalgorithms, default set in myproposals.h */
1.32      christos 2639:        if (options->add_keys_to_agent == -1) {
1.18      christos 2640:                options->add_keys_to_agent = 0;
1.32      christos 2641:                options->add_keys_to_agent_lifespan = 0;
                   2642:        }
1.1       christos 2643:        if (options->num_identity_files == 0) {
1.22      christos 2644:                add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
                   2645:                add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
                   2646:                add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
                   2647:                add_identity_file(options, "~/",
1.29      christos 2648:                    _PATH_SSH_CLIENT_ID_ECDSA_SK, 0);
                   2649:                add_identity_file(options, "~/",
1.22      christos 2650:                    _PATH_SSH_CLIENT_ID_ED25519, 0);
1.29      christos 2651:                add_identity_file(options, "~/",
                   2652:                    _PATH_SSH_CLIENT_ID_ED25519_SK, 0);
1.23      christos 2653:                add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_XMSS, 0);
1.1       christos 2654:        }
                   2655:        if (options->escape_char == -1)
                   2656:                options->escape_char = '~';
1.6       christos 2657:        if (options->num_system_hostfiles == 0) {
                   2658:                options->system_hostfiles[options->num_system_hostfiles++] =
                   2659:                    xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
                   2660:                options->system_hostfiles[options->num_system_hostfiles++] =
                   2661:                    xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
                   2662:        }
1.33      christos 2663:        if (options->update_hostkeys == -1) {
                   2664:                if (options->verify_host_key_dns <= 0 &&
                   2665:                    (options->num_user_hostfiles == 0 ||
                   2666:                    (options->num_user_hostfiles == 1 && strcmp(options->
                   2667:                    user_hostfiles[0], _PATH_SSH_USER_HOSTFILE) == 0)))
                   2668:                        options->update_hostkeys = SSH_UPDATE_HOSTKEYS_YES;
                   2669:                else
1.29      christos 2670:                        options->update_hostkeys = SSH_UPDATE_HOSTKEYS_NO;
1.33      christos 2671:        }
1.6       christos 2672:        if (options->num_user_hostfiles == 0) {
                   2673:                options->user_hostfiles[options->num_user_hostfiles++] =
                   2674:                    xstrdup(_PATH_SSH_USER_HOSTFILE);
                   2675:                options->user_hostfiles[options->num_user_hostfiles++] =
                   2676:                    xstrdup(_PATH_SSH_USER_HOSTFILE2);
                   2677:        }
1.1       christos 2678:        if (options->log_level == SYSLOG_LEVEL_NOT_SET)
                   2679:                options->log_level = SYSLOG_LEVEL_INFO;
1.22      christos 2680:        if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
                   2681:                options->log_facility = SYSLOG_FACILITY_USER;
1.1       christos 2682:        if (options->no_host_authentication_for_localhost == - 1)
                   2683:                options->no_host_authentication_for_localhost = 0;
                   2684:        if (options->identities_only == -1)
                   2685:                options->identities_only = 0;
                   2686:        if (options->enable_ssh_keysign == -1)
                   2687:                options->enable_ssh_keysign = 0;
                   2688:        if (options->rekey_limit == -1)
                   2689:                options->rekey_limit = 0;
1.11      christos 2690:        if (options->rekey_interval == -1)
                   2691:                options->rekey_interval = 0;
1.1       christos 2692:        if (options->verify_host_key_dns == -1)
                   2693:                options->verify_host_key_dns = 0;
                   2694:        if (options->server_alive_interval == -1)
                   2695:                options->server_alive_interval = 0;
                   2696:        if (options->server_alive_count_max == -1)
                   2697:                options->server_alive_count_max = 3;
1.2       christos 2698:        if (options->none_switch == -1)
                   2699:                options->none_switch = 0;
                   2700:        if (options->hpn_disabled == -1)
                   2701:                options->hpn_disabled = 0;
                   2702:        if (options->hpn_buffer_size > -1)
                   2703:        {
                   2704:          /* if a user tries to set the size to 0 set it to 1KB */
                   2705:                if (options->hpn_buffer_size == 0)
                   2706:                options->hpn_buffer_size = 1024;
                   2707:                /*limit the buffer to 64MB*/
                   2708:                if (options->hpn_buffer_size > 65536)
                   2709:                {
                   2710:                        options->hpn_buffer_size = 65536*1024;
                   2711:                        debug("User requested buffer larger than 64MB. Request reverted to 64MB");
                   2712:                }
                   2713:                debug("hpn_buffer_size set to %d", options->hpn_buffer_size);
                   2714:        }
                   2715:        if (options->tcp_rcv_buf == 0)
                   2716:                options->tcp_rcv_buf = 1;
                   2717:        if (options->tcp_rcv_buf > -1)
                   2718:                options->tcp_rcv_buf *=1024;
                   2719:        if (options->tcp_rcv_buf_poll == -1)
                   2720:                options->tcp_rcv_buf_poll = 1;
1.1       christos 2721:        if (options->control_master == -1)
                   2722:                options->control_master = 0;
1.4       adam     2723:        if (options->control_persist == -1) {
                   2724:                options->control_persist = 0;
                   2725:                options->control_persist_timeout = 0;
                   2726:        }
1.1       christos 2727:        if (options->hash_known_hosts == -1)
                   2728:                options->hash_known_hosts = 0;
                   2729:        if (options->tun_open == -1)
                   2730:                options->tun_open = SSH_TUNMODE_NO;
                   2731:        if (options->tun_local == -1)
                   2732:                options->tun_local = SSH_TUNID_ANY;
                   2733:        if (options->tun_remote == -1)
                   2734:                options->tun_remote = SSH_TUNID_ANY;
                   2735:        if (options->permit_local_command == -1)
                   2736:                options->permit_local_command = 0;
                   2737:        if (options->visual_host_key == -1)
                   2738:                options->visual_host_key = 0;
1.5       christos 2739:        if (options->ip_qos_interactive == -1)
1.25      christos 2740:                options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.5       christos 2741:        if (options->ip_qos_bulk == -1)
1.25      christos 2742:                options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.6       christos 2743:        if (options->request_tty == -1)
                   2744:                options->request_tty = REQUEST_TTY_AUTO;
1.35      christos 2745:        if (options->session_type == -1)
                   2746:                options->session_type = SESSION_TYPE_DEFAULT;
                   2747:        if (options->stdin_null == -1)
                   2748:                options->stdin_null = 0;
                   2749:        if (options->fork_after_authentication == -1)
                   2750:                options->fork_after_authentication = 0;
1.12      christos 2751:        if (options->proxy_use_fdpass == -1)
                   2752:                options->proxy_use_fdpass = 0;
                   2753:        if (options->canonicalize_max_dots == -1)
                   2754:                options->canonicalize_max_dots = 1;
                   2755:        if (options->canonicalize_fallback_local == -1)
                   2756:                options->canonicalize_fallback_local = 1;
                   2757:        if (options->canonicalize_hostname == -1)
                   2758:                options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.13      christos 2759:        if (options->fingerprint_hash == -1)
                   2760:                options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.29      christos 2761:        if (options->sk_provider == NULL)
                   2762:                options->sk_provider = xstrdup("internal");
1.25      christos 2763:
                   2764:        /* Expand KEX name lists */
                   2765:        all_cipher = cipher_alg_list(',', 0);
                   2766:        all_mac = mac_alg_list(',');
                   2767:        all_kex = kex_alg_list(',');
                   2768:        all_key = sshkey_alg_list(0, 0, 1, ',');
1.27      christos 2769:        all_sig = sshkey_alg_list(0, 1, 1, ',');
1.29      christos 2770:        /* remove unsupported algos from default lists */
1.32      christos 2771:        def_cipher = match_filter_allowlist(KEX_CLIENT_ENCRYPT, all_cipher);
                   2772:        def_mac = match_filter_allowlist(KEX_CLIENT_MAC, all_mac);
                   2773:        def_kex = match_filter_allowlist(KEX_CLIENT_KEX, all_kex);
                   2774:        def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
                   2775:        def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
1.25      christos 2776: #define ASSEMBLE(what, defaults, all) \
                   2777:        do { \
                   2778:                if ((r = kex_assemble_names(&options->what, \
1.33      christos 2779:                    defaults, all)) != 0) { \
                   2780:                        error_fr(r, "%s", #what); \
                   2781:                        goto fail; \
                   2782:                } \
1.25      christos 2783:        } while (0)
1.29      christos 2784:        ASSEMBLE(ciphers, def_cipher, all_cipher);
                   2785:        ASSEMBLE(macs, def_mac, all_mac);
                   2786:        ASSEMBLE(kex_algorithms, def_kex, all_kex);
1.33      christos 2787:        ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
                   2788:        ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
1.29      christos 2789:        ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
1.25      christos 2790: #undef ASSEMBLE
1.13      christos 2791:
1.7       tls      2792:        if (options->send_version_first == -1)
                   2793:                options->send_version_first = 1;
1.12      christos 2794: #define CLEAR_ON_NONE(v) \
                   2795:        do { \
                   2796:                if (option_clear_or_none(v)) { \
                   2797:                        free(v); \
                   2798:                        v = NULL; \
                   2799:                } \
                   2800:        } while(0)
                   2801:        CLEAR_ON_NONE(options->local_command);
1.22      christos 2802:        CLEAR_ON_NONE(options->remote_command);
1.12      christos 2803:        CLEAR_ON_NONE(options->proxy_command);
                   2804:        CLEAR_ON_NONE(options->control_path);
1.13      christos 2805:        CLEAR_ON_NONE(options->revoked_host_keys);
1.27      christos 2806:        CLEAR_ON_NONE(options->pkcs11_provider);
1.29      christos 2807:        CLEAR_ON_NONE(options->sk_provider);
1.33      christos 2808:        CLEAR_ON_NONE(options->known_hosts_command);
1.25      christos 2809:        if (options->jump_host != NULL &&
                   2810:            strcmp(options->jump_host, "none") == 0 &&
                   2811:            options->jump_port == 0 && options->jump_user == NULL) {
                   2812:                free(options->jump_host);
                   2813:                options->jump_host = NULL;
                   2814:        }
1.37    ! christos 2815:        if (options->num_permitted_cnames == 1 &&
        !          2816:            !config_has_permitted_cnames(options)) {
        !          2817:                /* clean up CanonicalizePermittedCNAMEs=none */
        !          2818:                free(options->permitted_cnames[0].source_list);
        !          2819:                free(options->permitted_cnames[0].target_list);
        !          2820:                memset(options->permitted_cnames, '\0',
        !          2821:                    sizeof(*options->permitted_cnames));
        !          2822:                options->num_permitted_cnames = 0;
        !          2823:        }
1.19      christos 2824:        /* options->identity_agent distinguishes NULL from 'none' */
1.1       christos 2825:        /* options->user will be set in the main program if appropriate */
                   2826:        /* options->hostname will be set in the main program if appropriate */
                   2827:        /* options->host_key_alias should not be set by default */
                   2828:        /* options->preferred_authentications will be set in ssh */
1.33      christos 2829:
                   2830:        /* success */
                   2831:        ret = 0;
                   2832:  fail:
                   2833:        free(all_cipher);
                   2834:        free(all_mac);
                   2835:        free(all_kex);
                   2836:        free(all_key);
                   2837:        free(all_sig);
                   2838:        free(def_cipher);
                   2839:        free(def_mac);
                   2840:        free(def_kex);
                   2841:        free(def_key);
                   2842:        free(def_sig);
                   2843:        return ret;
                   2844: }
                   2845:
                   2846: void
                   2847: free_options(Options *o)
                   2848: {
                   2849:        int i;
                   2850:
                   2851:        if (o == NULL)
                   2852:                return;
                   2853:
                   2854: #define FREE_ARRAY(type, n, a) \
                   2855:        do { \
                   2856:                type _i; \
                   2857:                for (_i = 0; _i < (n); _i++) \
                   2858:                        free((a)[_i]); \
                   2859:        } while (0)
                   2860:
                   2861:        free(o->forward_agent_sock_path);
                   2862:        free(o->xauth_location);
                   2863:        FREE_ARRAY(u_int, o->num_log_verbose, o->log_verbose);
                   2864:        free(o->log_verbose);
                   2865:        free(o->ciphers);
                   2866:        free(o->macs);
                   2867:        free(o->hostkeyalgorithms);
                   2868:        free(o->kex_algorithms);
                   2869:        free(o->ca_sign_algorithms);
                   2870:        free(o->hostname);
                   2871:        free(o->host_key_alias);
                   2872:        free(o->proxy_command);
                   2873:        free(o->user);
                   2874:        FREE_ARRAY(u_int, o->num_system_hostfiles, o->system_hostfiles);
                   2875:        FREE_ARRAY(u_int, o->num_user_hostfiles, o->user_hostfiles);
                   2876:        free(o->preferred_authentications);
                   2877:        free(o->bind_address);
                   2878:        free(o->bind_interface);
                   2879:        free(o->pkcs11_provider);
                   2880:        free(o->sk_provider);
                   2881:        for (i = 0; i < o->num_identity_files; i++) {
                   2882:                free(o->identity_files[i]);
                   2883:                sshkey_free(o->identity_keys[i]);
                   2884:        }
                   2885:        for (i = 0; i < o->num_certificate_files; i++) {
                   2886:                free(o->certificate_files[i]);
                   2887:                sshkey_free(o->certificates[i]);
                   2888:        }
                   2889:        free(o->identity_agent);
                   2890:        for (i = 0; i < o->num_local_forwards; i++) {
                   2891:                free(o->local_forwards[i].listen_host);
                   2892:                free(o->local_forwards[i].listen_path);
                   2893:                free(o->local_forwards[i].connect_host);
                   2894:                free(o->local_forwards[i].connect_path);
                   2895:        }
                   2896:        free(o->local_forwards);
                   2897:        for (i = 0; i < o->num_remote_forwards; i++) {
                   2898:                free(o->remote_forwards[i].listen_host);
                   2899:                free(o->remote_forwards[i].listen_path);
                   2900:                free(o->remote_forwards[i].connect_host);
                   2901:                free(o->remote_forwards[i].connect_path);
                   2902:        }
                   2903:        free(o->remote_forwards);
                   2904:        free(o->stdio_forward_host);
                   2905:        FREE_ARRAY(int, o->num_send_env, o->send_env);
                   2906:        free(o->send_env);
                   2907:        FREE_ARRAY(int, o->num_setenv, o->setenv);
                   2908:        free(o->setenv);
                   2909:        free(o->control_path);
                   2910:        free(o->local_command);
                   2911:        free(o->remote_command);
                   2912:        FREE_ARRAY(int, o->num_canonical_domains, o->canonical_domains);
                   2913:        for (i = 0; i < o->num_permitted_cnames; i++) {
                   2914:                free(o->permitted_cnames[i].source_list);
                   2915:                free(o->permitted_cnames[i].target_list);
                   2916:        }
                   2917:        free(o->revoked_host_keys);
                   2918:        free(o->hostbased_accepted_algos);
                   2919:        free(o->pubkey_accepted_algos);
                   2920:        free(o->jump_user);
                   2921:        free(o->jump_host);
                   2922:        free(o->jump_extra);
                   2923:        free(o->ignored_unknown);
                   2924:        explicit_bzero(o, sizeof(*o));
                   2925: #undef FREE_ARRAY
1.1       christos 2926: }
                   2927:
1.12      christos 2928: struct fwdarg {
                   2929:        char *arg;
                   2930:        int ispath;
                   2931: };
                   2932:
                   2933: /*
                   2934:  * parse_fwd_field
                   2935:  * parses the next field in a port forwarding specification.
                   2936:  * sets fwd to the parsed field and advances p past the colon
                   2937:  * or sets it to NULL at end of string.
                   2938:  * returns 0 on success, else non-zero.
                   2939:  */
                   2940: static int
                   2941: parse_fwd_field(char **p, struct fwdarg *fwd)
                   2942: {
                   2943:        char *ep, *cp = *p;
                   2944:        int ispath = 0;
                   2945:
                   2946:        if (*cp == '\0') {
                   2947:                *p = NULL;
                   2948:                return -1;      /* end of string */
                   2949:        }
                   2950:
                   2951:        /*
                   2952:         * A field escaped with square brackets is used literally.
                   2953:         * XXX - allow ']' to be escaped via backslash?
                   2954:         */
                   2955:        if (*cp == '[') {
                   2956:                /* find matching ']' */
                   2957:                for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
                   2958:                        if (*ep == '/')
                   2959:                                ispath = 1;
                   2960:                }
                   2961:                /* no matching ']' or not at end of field. */
                   2962:                if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
                   2963:                        return -1;
                   2964:                /* NUL terminate the field and advance p past the colon */
                   2965:                *ep++ = '\0';
                   2966:                if (*ep != '\0')
                   2967:                        *ep++ = '\0';
                   2968:                fwd->arg = cp + 1;
                   2969:                fwd->ispath = ispath;
                   2970:                *p = ep;
                   2971:                return 0;
                   2972:        }
                   2973:
                   2974:        for (cp = *p; *cp != '\0'; cp++) {
                   2975:                switch (*cp) {
                   2976:                case '\\':
                   2977:                        memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.14      christos 2978:                        if (*cp == '\0')
                   2979:                                return -1;
1.12      christos 2980:                        break;
                   2981:                case '/':
                   2982:                        ispath = 1;
                   2983:                        break;
                   2984:                case ':':
                   2985:                        *cp++ = '\0';
                   2986:                        goto done;
                   2987:                }
                   2988:        }
                   2989: done:
                   2990:        fwd->arg = *p;
                   2991:        fwd->ispath = ispath;
                   2992:        *p = cp;
                   2993:        return 0;
                   2994: }
                   2995:
1.1       christos 2996: /*
                   2997:  * parse_forward
                   2998:  * parses a string containing a port forwarding specification of the form:
                   2999:  *   dynamicfwd == 0
1.12      christos 3000:  *     [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
                   3001:  *     listenpath:connectpath
1.1       christos 3002:  *   dynamicfwd == 1
                   3003:  *     [listenhost:]listenport
                   3004:  * returns number of arguments parsed or zero on error
                   3005:  */
                   3006: int
1.12      christos 3007: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.1       christos 3008: {
1.12      christos 3009:        struct fwdarg fwdargs[4];
                   3010:        char *p, *cp;
1.32      christos 3011:        int i, err;
1.1       christos 3012:
1.12      christos 3013:        memset(fwd, 0, sizeof(*fwd));
                   3014:        memset(fwdargs, 0, sizeof(fwdargs));
1.1       christos 3015:
1.32      christos 3016:        /*
                   3017:         * We expand environment variables before checking if we think they're
                   3018:         * paths so that if ${VAR} expands to a fully qualified path it is
                   3019:         * treated as a path.
                   3020:         */
                   3021:        cp = p = dollar_expand(&err, fwdspec);
                   3022:        if (p == NULL || err)
                   3023:                return 0;
1.1       christos 3024:
                   3025:        /* skip leading spaces */
1.12      christos 3026:        while (isspace((u_char)*cp))
1.1       christos 3027:                cp++;
                   3028:
1.12      christos 3029:        for (i = 0; i < 4; ++i) {
                   3030:                if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.1       christos 3031:                        break;
1.12      christos 3032:        }
1.1       christos 3033:
                   3034:        /* Check for trailing garbage */
1.12      christos 3035:        if (cp != NULL && *cp != '\0') {
1.1       christos 3036:                i = 0;  /* failure */
1.12      christos 3037:        }
1.1       christos 3038:
                   3039:        switch (i) {
                   3040:        case 1:
1.12      christos 3041:                if (fwdargs[0].ispath) {
                   3042:                        fwd->listen_path = xstrdup(fwdargs[0].arg);
                   3043:                        fwd->listen_port = PORT_STREAMLOCAL;
                   3044:                } else {
                   3045:                        fwd->listen_host = NULL;
                   3046:                        fwd->listen_port = a2port(fwdargs[0].arg);
                   3047:                }
1.1       christos 3048:                fwd->connect_host = xstrdup("socks");
                   3049:                break;
                   3050:
                   3051:        case 2:
1.12      christos 3052:                if (fwdargs[0].ispath && fwdargs[1].ispath) {
                   3053:                        fwd->listen_path = xstrdup(fwdargs[0].arg);
                   3054:                        fwd->listen_port = PORT_STREAMLOCAL;
                   3055:                        fwd->connect_path = xstrdup(fwdargs[1].arg);
                   3056:                        fwd->connect_port = PORT_STREAMLOCAL;
                   3057:                } else if (fwdargs[1].ispath) {
                   3058:                        fwd->listen_host = NULL;
                   3059:                        fwd->listen_port = a2port(fwdargs[0].arg);
                   3060:                        fwd->connect_path = xstrdup(fwdargs[1].arg);
                   3061:                        fwd->connect_port = PORT_STREAMLOCAL;
                   3062:                } else {
                   3063:                        fwd->listen_host = xstrdup(fwdargs[0].arg);
                   3064:                        fwd->listen_port = a2port(fwdargs[1].arg);
                   3065:                        fwd->connect_host = xstrdup("socks");
                   3066:                }
1.1       christos 3067:                break;
                   3068:
                   3069:        case 3:
1.12      christos 3070:                if (fwdargs[0].ispath) {
                   3071:                        fwd->listen_path = xstrdup(fwdargs[0].arg);
                   3072:                        fwd->listen_port = PORT_STREAMLOCAL;
                   3073:                        fwd->connect_host = xstrdup(fwdargs[1].arg);
                   3074:                        fwd->connect_port = a2port(fwdargs[2].arg);
                   3075:                } else if (fwdargs[2].ispath) {
                   3076:                        fwd->listen_host = xstrdup(fwdargs[0].arg);
                   3077:                        fwd->listen_port = a2port(fwdargs[1].arg);
                   3078:                        fwd->connect_path = xstrdup(fwdargs[2].arg);
                   3079:                        fwd->connect_port = PORT_STREAMLOCAL;
                   3080:                } else {
                   3081:                        fwd->listen_host = NULL;
                   3082:                        fwd->listen_port = a2port(fwdargs[0].arg);
                   3083:                        fwd->connect_host = xstrdup(fwdargs[1].arg);
                   3084:                        fwd->connect_port = a2port(fwdargs[2].arg);
                   3085:                }
1.1       christos 3086:                break;
                   3087:
                   3088:        case 4:
1.12      christos 3089:                fwd->listen_host = xstrdup(fwdargs[0].arg);
                   3090:                fwd->listen_port = a2port(fwdargs[1].arg);
                   3091:                fwd->connect_host = xstrdup(fwdargs[2].arg);
                   3092:                fwd->connect_port = a2port(fwdargs[3].arg);
1.1       christos 3093:                break;
                   3094:        default:
                   3095:                i = 0; /* failure */
                   3096:        }
                   3097:
1.11      christos 3098:        free(p);
1.1       christos 3099:
                   3100:        if (dynamicfwd) {
                   3101:                if (!(i == 1 || i == 2))
                   3102:                        goto fail_free;
                   3103:        } else {
1.12      christos 3104:                if (!(i == 3 || i == 4)) {
                   3105:                        if (fwd->connect_path == NULL &&
                   3106:                            fwd->listen_path == NULL)
                   3107:                                goto fail_free;
                   3108:                }
                   3109:                if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.1       christos 3110:                        goto fail_free;
                   3111:        }
                   3112:
1.12      christos 3113:        if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
                   3114:            (!remotefwd && fwd->listen_port == 0))
1.1       christos 3115:                goto fail_free;
                   3116:        if (fwd->connect_host != NULL &&
                   3117:            strlen(fwd->connect_host) >= NI_MAXHOST)
                   3118:                goto fail_free;
1.35      christos 3119:        /*
                   3120:         * XXX - if connecting to a remote socket, max sun len may not
                   3121:         * match this host
                   3122:         */
1.12      christos 3123:        if (fwd->connect_path != NULL &&
                   3124:            strlen(fwd->connect_path) >= PATH_MAX_SUN)
                   3125:                goto fail_free;
1.1       christos 3126:        if (fwd->listen_host != NULL &&
                   3127:            strlen(fwd->listen_host) >= NI_MAXHOST)
                   3128:                goto fail_free;
1.12      christos 3129:        if (fwd->listen_path != NULL &&
                   3130:            strlen(fwd->listen_path) >= PATH_MAX_SUN)
                   3131:                goto fail_free;
1.1       christos 3132:
                   3133:        return (i);
                   3134:
                   3135:  fail_free:
1.11      christos 3136:        free(fwd->connect_host);
                   3137:        fwd->connect_host = NULL;
1.12      christos 3138:        free(fwd->connect_path);
                   3139:        fwd->connect_path = NULL;
1.11      christos 3140:        free(fwd->listen_host);
                   3141:        fwd->listen_host = NULL;
1.12      christos 3142:        free(fwd->listen_path);
                   3143:        fwd->listen_path = NULL;
1.1       christos 3144:        return (0);
                   3145: }
1.13      christos 3146:
1.19      christos 3147: int
                   3148: parse_jump(const char *s, Options *o, int active)
                   3149: {
                   3150:        char *orig, *sdup, *cp;
                   3151:        char *host = NULL, *user = NULL;
1.33      christos 3152:        int r, ret = -1, port = -1, first;
1.19      christos 3153:
                   3154:        active &= o->proxy_command == NULL && o->jump_host == NULL;
                   3155:
                   3156:        orig = sdup = xstrdup(s);
1.35      christos 3157:
                   3158:        /* Remove comment and trailing whitespace */
                   3159:        if ((cp = strchr(orig, '#')) != NULL)
                   3160:                *cp = '\0';
                   3161:        rtrim(orig);
                   3162:
1.19      christos 3163:        first = active;
                   3164:        do {
1.25      christos 3165:                if (strcasecmp(s, "none") == 0)
                   3166:                        break;
1.19      christos 3167:                if ((cp = strrchr(sdup, ',')) == NULL)
                   3168:                        cp = sdup; /* last */
                   3169:                else
                   3170:                        *cp++ = '\0';
                   3171:
                   3172:                if (first) {
                   3173:                        /* First argument and configuration is active */
1.33      christos 3174:                        r = parse_ssh_uri(cp, &user, &host, &port);
                   3175:                        if (r == -1 || (r == 1 &&
                   3176:                            parse_user_host_port(cp, &user, &host, &port) != 0))
1.19      christos 3177:                                goto out;
                   3178:                } else {
                   3179:                        /* Subsequent argument or inactive configuration */
1.33      christos 3180:                        r = parse_ssh_uri(cp, NULL, NULL, NULL);
                   3181:                        if (r == -1 || (r == 1 &&
                   3182:                            parse_user_host_port(cp, NULL, NULL, NULL) != 0))
1.19      christos 3183:                                goto out;
                   3184:                }
                   3185:                first = 0; /* only check syntax for subsequent hosts */
                   3186:        } while (cp != sdup);
                   3187:        /* success */
                   3188:        if (active) {
1.25      christos 3189:                if (strcasecmp(s, "none") == 0) {
                   3190:                        o->jump_host = xstrdup("none");
                   3191:                        o->jump_port = 0;
                   3192:                } else {
                   3193:                        o->jump_user = user;
                   3194:                        o->jump_host = host;
                   3195:                        o->jump_port = port;
                   3196:                        o->proxy_command = xstrdup("none");
                   3197:                        user = host = NULL;
                   3198:                        if ((cp = strrchr(s, ',')) != NULL && cp != s) {
                   3199:                                o->jump_extra = xstrdup(s);
                   3200:                                o->jump_extra[cp - s] = '\0';
                   3201:                        }
1.19      christos 3202:                }
                   3203:        }
                   3204:        ret = 0;
                   3205:  out:
                   3206:        free(orig);
                   3207:        free(user);
                   3208:        free(host);
                   3209:        return ret;
                   3210: }
                   3211:
1.23      christos 3212: int
                   3213: parse_ssh_uri(const char *uri, char **userp, char **hostp, int *portp)
                   3214: {
1.33      christos 3215:        char *user = NULL, *host = NULL, *path = NULL;
                   3216:        int r, port;
1.23      christos 3217:
1.33      christos 3218:        r = parse_uri("ssh", uri, &user, &host, &port, &path);
1.23      christos 3219:        if (r == 0 && path != NULL)
                   3220:                r = -1;         /* path not allowed */
1.33      christos 3221:        if (r == 0) {
                   3222:                if (userp != NULL) {
                   3223:                        *userp = user;
                   3224:                        user = NULL;
                   3225:                }
                   3226:                if (hostp != NULL) {
                   3227:                        *hostp = host;
                   3228:                        host = NULL;
                   3229:                }
                   3230:                if (portp != NULL)
                   3231:                        *portp = port;
                   3232:        }
                   3233:        free(user);
                   3234:        free(host);
                   3235:        free(path);
1.23      christos 3236:        return r;
                   3237: }
                   3238:
1.13      christos 3239: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
                   3240: static const char *
                   3241: fmt_multistate_int(int val, const struct multistate *m)
                   3242: {
                   3243:        u_int i;
                   3244:
                   3245:        for (i = 0; m[i].key != NULL; i++) {
                   3246:                if (m[i].value == val)
                   3247:                        return m[i].key;
                   3248:        }
                   3249:        return "UNKNOWN";
                   3250: }
                   3251:
                   3252: static const char *
                   3253: fmt_intarg(OpCodes code, int val)
                   3254: {
                   3255:        if (val == -1)
                   3256:                return "unset";
                   3257:        switch (code) {
                   3258:        case oAddressFamily:
                   3259:                return fmt_multistate_int(val, multistate_addressfamily);
                   3260:        case oVerifyHostKeyDNS:
                   3261:        case oUpdateHostkeys:
                   3262:                return fmt_multistate_int(val, multistate_yesnoask);
1.22      christos 3263:        case oStrictHostKeyChecking:
                   3264:                return fmt_multistate_int(val, multistate_strict_hostkey);
1.13      christos 3265:        case oControlMaster:
                   3266:                return fmt_multistate_int(val, multistate_controlmaster);
                   3267:        case oTunnel:
                   3268:                return fmt_multistate_int(val, multistate_tunnel);
                   3269:        case oRequestTTY:
                   3270:                return fmt_multistate_int(val, multistate_requesttty);
1.35      christos 3271:        case oSessionType:
                   3272:                return fmt_multistate_int(val, multistate_sessiontype);
1.13      christos 3273:        case oCanonicalizeHostname:
                   3274:                return fmt_multistate_int(val, multistate_canonicalizehostname);
1.25      christos 3275:        case oAddKeysToAgent:
                   3276:                return fmt_multistate_int(val, multistate_yesnoaskconfirm);
1.13      christos 3277:        case oFingerprintHash:
                   3278:                return ssh_digest_alg_name(val);
                   3279:        default:
                   3280:                switch (val) {
                   3281:                case 0:
                   3282:                        return "no";
                   3283:                case 1:
                   3284:                        return "yes";
                   3285:                default:
                   3286:                        return "UNKNOWN";
                   3287:                }
                   3288:        }
                   3289: }
                   3290:
                   3291: static const char *
                   3292: lookup_opcode_name(OpCodes code)
                   3293: {
                   3294:        u_int i;
                   3295:
                   3296:        for (i = 0; keywords[i].name != NULL; i++)
                   3297:                if (keywords[i].opcode == code)
                   3298:                        return(keywords[i].name);
                   3299:        return "UNKNOWN";
                   3300: }
                   3301:
                   3302: static void
                   3303: dump_cfg_int(OpCodes code, int val)
                   3304: {
                   3305:        printf("%s %d\n", lookup_opcode_name(code), val);
                   3306: }
                   3307:
                   3308: static void
                   3309: dump_cfg_fmtint(OpCodes code, int val)
                   3310: {
                   3311:        printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
                   3312: }
                   3313:
                   3314: static void
                   3315: dump_cfg_string(OpCodes code, const char *val)
                   3316: {
                   3317:        if (val == NULL)
                   3318:                return;
                   3319:        printf("%s %s\n", lookup_opcode_name(code), val);
                   3320: }
                   3321:
                   3322: static void
                   3323: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
                   3324: {
                   3325:        u_int i;
                   3326:
                   3327:        for (i = 0; i < count; i++)
                   3328:                printf("%s %s\n", lookup_opcode_name(code), vals[i]);
                   3329: }
                   3330:
                   3331: static void
                   3332: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
                   3333: {
                   3334:        u_int i;
                   3335:
                   3336:        printf("%s", lookup_opcode_name(code));
1.35      christos 3337:        if (count == 0)
                   3338:                printf(" none");
1.13      christos 3339:        for (i = 0; i < count; i++)
                   3340:                printf(" %s",  vals[i]);
                   3341:        printf("\n");
                   3342: }
                   3343:
                   3344: static void
                   3345: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
                   3346: {
                   3347:        const struct Forward *fwd;
                   3348:        u_int i;
                   3349:
                   3350:        /* oDynamicForward */
                   3351:        for (i = 0; i < count; i++) {
                   3352:                fwd = &fwds[i];
1.21      christos 3353:                if (code == oDynamicForward && fwd->connect_host != NULL &&
1.13      christos 3354:                    strcmp(fwd->connect_host, "socks") != 0)
                   3355:                        continue;
1.21      christos 3356:                if (code == oLocalForward && fwd->connect_host != NULL &&
1.13      christos 3357:                    strcmp(fwd->connect_host, "socks") == 0)
                   3358:                        continue;
                   3359:                printf("%s", lookup_opcode_name(code));
                   3360:                if (fwd->listen_port == PORT_STREAMLOCAL)
                   3361:                        printf(" %s", fwd->listen_path);
                   3362:                else if (fwd->listen_host == NULL)
                   3363:                        printf(" %d", fwd->listen_port);
                   3364:                else {
                   3365:                        printf(" [%s]:%d",
                   3366:                            fwd->listen_host, fwd->listen_port);
                   3367:                }
                   3368:                if (code != oDynamicForward) {
                   3369:                        if (fwd->connect_port == PORT_STREAMLOCAL)
                   3370:                                printf(" %s", fwd->connect_path);
                   3371:                        else if (fwd->connect_host == NULL)
                   3372:                                printf(" %d", fwd->connect_port);
                   3373:                        else {
                   3374:                                printf(" [%s]:%d",
                   3375:                                    fwd->connect_host, fwd->connect_port);
                   3376:                        }
                   3377:                }
                   3378:                printf("\n");
                   3379:        }
                   3380: }
                   3381:
                   3382: void
                   3383: dump_client_config(Options *o, const char *host)
                   3384: {
1.29      christos 3385:        int i, r;
1.25      christos 3386:        char buf[8], *all_key;
1.13      christos 3387:
1.29      christos 3388:        /*
                   3389:         * Expand HostKeyAlgorithms name lists. This isn't handled in
                   3390:         * fill_default_options() like the other algorithm lists because
                   3391:         * the host key algorithms are by default dynamically chosen based
                   3392:         * on the host's keys found in known_hosts.
                   3393:         */
1.25      christos 3394:        all_key = sshkey_alg_list(0, 0, 1, ',');
1.29      christos 3395:        if ((r = kex_assemble_names(&o->hostkeyalgorithms, kex_default_pk_alg(),
                   3396:            all_key)) != 0)
1.33      christos 3397:                fatal_fr(r, "expand HostKeyAlgorithms");
1.25      christos 3398:        free(all_key);
1.18      christos 3399:
1.13      christos 3400:        /* Most interesting options first: user, host, port */
                   3401:        dump_cfg_string(oUser, o->user);
1.28      christos 3402:        dump_cfg_string(oHostname, host);
1.13      christos 3403:        dump_cfg_int(oPort, o->port);
                   3404:
                   3405:        /* Flag options */
                   3406:        dump_cfg_fmtint(oAddressFamily, o->address_family);
                   3407:        dump_cfg_fmtint(oBatchMode, o->batch_mode);
                   3408:        dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
                   3409:        dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
                   3410:        dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
                   3411:        dump_cfg_fmtint(oCompression, o->compression);
                   3412:        dump_cfg_fmtint(oControlMaster, o->control_master);
                   3413:        dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.19      christos 3414:        dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.13      christos 3415:        dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
                   3416:        dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
                   3417:        dump_cfg_fmtint(oForwardX11, o->forward_x11);
                   3418:        dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
                   3419:        dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
                   3420: #ifdef GSSAPI
                   3421:        dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
                   3422:        dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
                   3423: #endif /* GSSAPI */
                   3424:        dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
                   3425:        dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
                   3426:        dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
                   3427:        dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
                   3428:        dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
                   3429:        dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
                   3430:        dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
                   3431:        dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
                   3432:        dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
                   3433:        dump_cfg_fmtint(oRequestTTY, o->request_tty);
1.35      christos 3434:        dump_cfg_fmtint(oSessionType, o->session_type);
                   3435:        dump_cfg_fmtint(oStdinNull, o->stdin_null);
                   3436:        dump_cfg_fmtint(oForkAfterAuthentication, o->fork_after_authentication);
1.13      christos 3437:        dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
                   3438:        dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
                   3439:        dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
                   3440:        dump_cfg_fmtint(oTunnel, o->tun_open);
                   3441:        dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
                   3442:        dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
                   3443:        dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
                   3444:
                   3445:        /* Integer options */
                   3446:        dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
                   3447:        dump_cfg_int(oConnectionAttempts, o->connection_attempts);
                   3448:        dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
                   3449:        dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
                   3450:        dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
                   3451:        dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
                   3452:
                   3453:        /* String options */
                   3454:        dump_cfg_string(oBindAddress, o->bind_address);
1.23      christos 3455:        dump_cfg_string(oBindInterface, o->bind_interface);
1.29      christos 3456:        dump_cfg_string(oCiphers, o->ciphers);
1.13      christos 3457:        dump_cfg_string(oControlPath, o->control_path);
1.18      christos 3458:        dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.13      christos 3459:        dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.33      christos 3460:        dump_cfg_string(oHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
1.19      christos 3461:        dump_cfg_string(oIdentityAgent, o->identity_agent);
1.25      christos 3462:        dump_cfg_string(oIgnoreUnknown, o->ignored_unknown);
1.13      christos 3463:        dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
1.29      christos 3464:        dump_cfg_string(oKexAlgorithms, o->kex_algorithms);
                   3465:        dump_cfg_string(oCASignatureAlgorithms, o->ca_sign_algorithms);
1.13      christos 3466:        dump_cfg_string(oLocalCommand, o->local_command);
1.22      christos 3467:        dump_cfg_string(oRemoteCommand, o->remote_command);
1.13      christos 3468:        dump_cfg_string(oLogLevel, log_level_name(o->log_level));
1.29      christos 3469:        dump_cfg_string(oMacs, o->macs);
1.21      christos 3470: #ifdef ENABLE_PKCS11
1.13      christos 3471:        dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.21      christos 3472: #endif
1.29      christos 3473:        dump_cfg_string(oSecurityKeyProvider, o->sk_provider);
1.13      christos 3474:        dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.33      christos 3475:        dump_cfg_string(oPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
1.13      christos 3476:        dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
                   3477:        dump_cfg_string(oXAuthLocation, o->xauth_location);
1.33      christos 3478:        dump_cfg_string(oKnownHostsCommand, o->known_hosts_command);
1.13      christos 3479:
                   3480:        /* Forwards */
                   3481:        dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
                   3482:        dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
                   3483:        dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
                   3484:
                   3485:        /* String array options */
                   3486:        dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
                   3487:        dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
1.25      christos 3488:        dump_cfg_strarray(oCertificateFile, o->num_certificate_files, o->certificate_files);
1.13      christos 3489:        dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
                   3490:        dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
                   3491:        dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
1.25      christos 3492:        dump_cfg_strarray(oSetEnv, o->num_setenv, o->setenv);
1.33      christos 3493:        dump_cfg_strarray_oneline(oLogVerbose,
                   3494:            o->num_log_verbose, o->log_verbose);
1.13      christos 3495:
                   3496:        /* Special cases */
                   3497:
1.33      christos 3498:        /* PermitRemoteOpen */
                   3499:        if (o->num_permitted_remote_opens == 0)
                   3500:                printf("%s any\n", lookup_opcode_name(oPermitRemoteOpen));
                   3501:        else
                   3502:                dump_cfg_strarray_oneline(oPermitRemoteOpen,
                   3503:                    o->num_permitted_remote_opens, o->permitted_remote_opens);
                   3504:
1.32      christos 3505:        /* AddKeysToAgent */
                   3506:        if (o->add_keys_to_agent_lifespan <= 0)
                   3507:                dump_cfg_fmtint(oAddKeysToAgent, o->add_keys_to_agent);
                   3508:        else {
                   3509:                printf("addkeystoagent%s %d\n",
                   3510:                    o->add_keys_to_agent == 3 ? " confirm" : "",
                   3511:                    o->add_keys_to_agent_lifespan);
                   3512:        }
                   3513:
1.29      christos 3514:        /* oForwardAgent */
                   3515:        if (o->forward_agent_sock_path == NULL)
                   3516:                dump_cfg_fmtint(oForwardAgent, o->forward_agent);
                   3517:        else
                   3518:                dump_cfg_string(oForwardAgent, o->forward_agent_sock_path);
                   3519:
1.13      christos 3520:        /* oConnectTimeout */
                   3521:        if (o->connection_timeout == -1)
                   3522:                printf("connecttimeout none\n");
                   3523:        else
                   3524:                dump_cfg_int(oConnectTimeout, o->connection_timeout);
                   3525:
                   3526:        /* oTunnelDevice */
                   3527:        printf("tunneldevice");
                   3528:        if (o->tun_local == SSH_TUNID_ANY)
                   3529:                printf(" any");
                   3530:        else
                   3531:                printf(" %d", o->tun_local);
                   3532:        if (o->tun_remote == SSH_TUNID_ANY)
                   3533:                printf(":any");
                   3534:        else
                   3535:                printf(":%d", o->tun_remote);
                   3536:        printf("\n");
                   3537:
                   3538:        /* oCanonicalizePermittedCNAMEs */
1.37    ! christos 3539:        printf("canonicalizePermittedcnames");
        !          3540:        if (o->num_permitted_cnames == 0)
        !          3541:                printf(" none");
        !          3542:        for (i = 0; i < o->num_permitted_cnames; i++) {
        !          3543:                printf(" %s:%s", o->permitted_cnames[i].source_list,
        !          3544:                    o->permitted_cnames[i].target_list);
1.13      christos 3545:        }
1.37    ! christos 3546:        printf("\n");
1.13      christos 3547:
                   3548:        /* oControlPersist */
                   3549:        if (o->control_persist == 0 || o->control_persist_timeout == 0)
                   3550:                dump_cfg_fmtint(oControlPersist, o->control_persist);
                   3551:        else
                   3552:                dump_cfg_int(oControlPersist, o->control_persist_timeout);
                   3553:
                   3554:        /* oEscapeChar */
                   3555:        if (o->escape_char == SSH_ESCAPECHAR_NONE)
                   3556:                printf("escapechar none\n");
                   3557:        else {
1.19      christos 3558:                vis(buf, o->escape_char, VIS_WHITE, 0);
                   3559:                printf("escapechar %s\n", buf);
1.13      christos 3560:        }
                   3561:
                   3562:        /* oIPQoS */
                   3563:        printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
                   3564:        printf("%s\n", iptos2str(o->ip_qos_bulk));
                   3565:
                   3566:        /* oRekeyLimit */
1.18      christos 3567:        printf("rekeylimit %llu %d\n",
                   3568:            (unsigned long long)o->rekey_limit, o->rekey_interval);
1.13      christos 3569:
                   3570:        /* oStreamLocalBindMask */
                   3571:        printf("streamlocalbindmask 0%o\n",
                   3572:            o->fwd_opts.streamlocal_bind_mask);
1.19      christos 3573:
1.25      christos 3574:        /* oLogFacility */
                   3575:        printf("syslogfacility %s\n", log_facility_name(o->log_facility));
                   3576:
1.19      christos 3577:        /* oProxyCommand / oProxyJump */
                   3578:        if (o->jump_host == NULL)
                   3579:                dump_cfg_string(oProxyCommand, o->proxy_command);
                   3580:        else {
                   3581:                /* Check for numeric addresses */
                   3582:                i = strchr(o->jump_host, ':') != NULL ||
                   3583:                    strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
                   3584:                snprintf(buf, sizeof(buf), "%d", o->jump_port);
                   3585:                printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
                   3586:                    /* optional additional jump spec */
                   3587:                    o->jump_extra == NULL ? "" : o->jump_extra,
                   3588:                    o->jump_extra == NULL ? "" : ",",
                   3589:                    /* optional user */
                   3590:                    o->jump_user == NULL ? "" : o->jump_user,
                   3591:                    o->jump_user == NULL ? "" : "@",
                   3592:                    /* opening [ if hostname is numeric */
                   3593:                    i ? "[" : "",
                   3594:                    /* mandatory hostname */
                   3595:                    o->jump_host,
                   3596:                    /* closing ] if hostname is numeric */
                   3597:                    i ? "]" : "",
                   3598:                    /* optional port number */
                   3599:                    o->jump_port <= 0 ? "" : ":",
                   3600:                    o->jump_port <= 0 ? "" : buf);
                   3601:        }
1.13      christos 3602: }

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