X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/38c295d646559d5e684af97dbdfe3378871a9081..5486a45797557bd2ffca421ca5e7ad2441f4db59:/readconf.c diff --git a/readconf.c b/readconf.c index 0ede55d9..2591e0db 100644 --- a/readconf.c +++ b/readconf.c @@ -1,27 +1,30 @@ /* - * - * readconf.c - * * Author: Tatu Ylonen - * * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland * All rights reserved - * - * Created: Sat Apr 22 00:03:10 1995 ylo - * * Functions for reading the configuration files. * + * As far as I am concerned, the code I have written for this software + * can be used freely for any purpose. Any derived versions of this + * software must be clearly marked as such, and if the derived work is + * incompatible with the protocol description in the RFC file, it must be + * called by a name other than "ssh" or "Secure Shell". */ #include "includes.h" -RCSID("$Id$"); +RCSID("$OpenBSD: readconf.c,v 1.127 2003/12/16 15:49:51 markus Exp $"); #include "ssh.h" +#include "xmalloc.h" +#include "compat.h" #include "cipher.h" +#include "pathnames.h" +#include "log.h" #include "readconf.h" #include "match.h" -#include "xmalloc.h" -#include "compat.h" +#include "misc.h" +#include "kex.h" +#include "mac.h" /* Format of the configuration file: @@ -38,7 +41,7 @@ RCSID("$Id$"); # that they are given in. Host *.ngs.fi ngs.fi - FallBackToRsh no + User foo Host fake.com HostName another.host.name.real.org @@ -54,7 +57,6 @@ RCSID("$Id$"); Host fascist.blob.com Port 23123 User tylonen - RhostsAuthentication no PasswordAuthentication no Host puukko.hut.fi @@ -62,7 +64,7 @@ RCSID("$Id$"); ProxyCommand ssh-proxy %h %p Host *.fr - UseRsh yes + PublicKeyAuthentication no Host *.su Cipher none @@ -71,15 +73,12 @@ RCSID("$Id$"); # Defaults for various options Host * ForwardAgent no - ForwardX11 yes - RhostsAuthentication yes + ForwardX11 no PasswordAuthentication yes RSAAuthentication yes RhostsRSAAuthentication yes - FallBackToRsh no - UseRsh no StrictHostKeyChecking yes - KeepAlives no + TcpKeepAlive no IdentityFile ~/.ssh/identity Port 22 EscapeChar ~ @@ -90,22 +89,24 @@ RCSID("$Id$"); typedef enum { oBadOption, - oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, - oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, - oSkeyAuthentication, oXAuthLocation, -#ifdef KRB4 - oKerberosAuthentication, -#endif /* KRB4 */ -#ifdef AFS - oKerberosTgtPassing, oAFSTokenPassing, -#endif + oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, + oPasswordAuthentication, oRSAAuthentication, + oChallengeResponseAuthentication, oXAuthLocation, oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, - oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, - oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oIdentityFile2, - oGlobalKnownHostsFile2, oUserKnownHostsFile2, oDSAAuthentication + oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, + oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, + oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, + oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, + oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, + oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, + oClearAllForwardings, oNoHostAuthenticationForLocalhost, + oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, + oAddressFamily, oGssAuthentication, oGssDelegateCreds, + oServerAliveInterval, oServerAliveCountMax, + oDeprecated, oUnsupported } OpCodes; /* Textual representations of the tokens. */ @@ -116,58 +117,84 @@ static struct { } keywords[] = { { "forwardagent", oForwardAgent }, { "forwardx11", oForwardX11 }, + { "forwardx11trusted", oForwardX11Trusted }, { "xauthlocation", oXAuthLocation }, { "gatewayports", oGatewayPorts }, { "useprivilegedport", oUsePrivilegedPort }, - { "rhostsauthentication", oRhostsAuthentication }, + { "rhostsauthentication", oDeprecated }, { "passwordauthentication", oPasswordAuthentication }, + { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, + { "kbdinteractivedevices", oKbdInteractiveDevices }, { "rsaauthentication", oRSAAuthentication }, - { "dsaauthentication", oDSAAuthentication }, - { "skeyauthentication", oSkeyAuthentication }, -#ifdef KRB4 - { "kerberosauthentication", oKerberosAuthentication }, -#endif /* KRB4 */ -#ifdef AFS - { "kerberostgtpassing", oKerberosTgtPassing }, - { "afstokenpassing", oAFSTokenPassing }, + { "pubkeyauthentication", oPubkeyAuthentication }, + { "dsaauthentication", oPubkeyAuthentication }, /* alias */ + { "rhostsrsaauthentication", oRhostsRSAAuthentication }, + { "hostbasedauthentication", oHostbasedAuthentication }, + { "challengeresponseauthentication", oChallengeResponseAuthentication }, + { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ + { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ + { "kerberosauthentication", oUnsupported }, + { "kerberostgtpassing", oUnsupported }, + { "afstokenpassing", oUnsupported }, +#if defined(GSSAPI) + { "gssapiauthentication", oGssAuthentication }, + { "gssapidelegatecredentials", oGssDelegateCreds }, +#else + { "gssapiauthentication", oUnsupported }, + { "gssapidelegatecredentials", oUnsupported }, #endif - { "fallbacktorsh", oFallBackToRsh }, - { "usersh", oUseRsh }, + { "fallbacktorsh", oDeprecated }, + { "usersh", oDeprecated }, { "identityfile", oIdentityFile }, - { "identityfile2", oIdentityFile2 }, + { "identityfile2", oIdentityFile }, /* alias */ { "hostname", oHostName }, + { "hostkeyalias", oHostKeyAlias }, { "proxycommand", oProxyCommand }, { "port", oPort }, { "cipher", oCipher }, { "ciphers", oCiphers }, + { "macs", oMacs }, { "protocol", oProtocol }, { "remoteforward", oRemoteForward }, { "localforward", oLocalForward }, { "user", oUser }, { "host", oHost }, { "escapechar", oEscapeChar }, - { "rhostsrsaauthentication", oRhostsRSAAuthentication }, { "globalknownhostsfile", oGlobalKnownHostsFile }, - { "userknownhostsfile", oUserKnownHostsFile }, + { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, - { "userknownhostsfile2", oUserKnownHostsFile2 }, + { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ { "connectionattempts", oConnectionAttempts }, { "batchmode", oBatchMode }, { "checkhostip", oCheckHostIP }, { "stricthostkeychecking", oStrictHostKeyChecking }, { "compression", oCompression }, { "compressionlevel", oCompressionLevel }, - { "keepalive", oKeepAlives }, + { "tcpkeepalive", oTCPKeepAlive }, + { "keepalive", oTCPKeepAlive }, /* obsolete */ { "numberofpasswordprompts", oNumberOfPasswordPrompts }, - { "tisauthentication", oTISAuthentication }, { "loglevel", oLogLevel }, - { NULL, 0 } + { "dynamicforward", oDynamicForward }, + { "preferredauthentications", oPreferredAuthentications }, + { "hostkeyalgorithms", oHostKeyAlgorithms }, + { "bindaddress", oBindAddress }, +#ifdef SMARTCARD + { "smartcarddevice", oSmartcardDevice }, +#else + { "smartcarddevice", oUnsupported }, +#endif + { "clearallforwardings", oClearAllForwardings }, + { "enablesshkeysign", oEnableSSHKeysign }, + { "verifyhostkeydns", oVerifyHostKeyDNS }, + { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, + { "rekeylimit", oRekeyLimit }, + { "connecttimeout", oConnectTimeout }, + { "addressfamily", oAddressFamily }, + { "serveraliveinterval", oServerAliveInterval }, + { "serveralivecountmax", oServerAliveCountMax }, + { NULL, oBadOption } }; -/* Characters considered whitespace in strtok calls. */ -#define WHITESPACE " \t\r\n=" - - /* * Adds a local TCP/IP port forward to options. Never returns if there is an * error. @@ -178,9 +205,11 @@ add_local_forward(Options *options, u_short port, const char *host, u_short host_port) { Forward *fwd; +#ifndef NO_IPPORT_RESERVED_CONCEPT extern uid_t original_real_uid; if (port < IPPORT_RESERVED && original_real_uid != 0) - fatal("Privileged ports can only be forwarded by root.\n"); + fatal("Privileged ports can only be forwarded by root."); +#endif if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); fwd = &options->local_forwards[options->num_local_forwards++]; @@ -201,29 +230,41 @@ add_remote_forward(Options *options, u_short port, const char *host, Forward *fwd; if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) fatal("Too many remote forwards (max %d).", - SSH_MAX_FORWARDS_PER_DIRECTION); + SSH_MAX_FORWARDS_PER_DIRECTION); fwd = &options->remote_forwards[options->num_remote_forwards++]; fwd->port = port; fwd->host = xstrdup(host); fwd->host_port = host_port; } +static void +clear_forwardings(Options *options) +{ + int i; + + for (i = 0; i < options->num_local_forwards; i++) + xfree(options->local_forwards[i].host); + options->num_local_forwards = 0; + for (i = 0; i < options->num_remote_forwards; i++) + xfree(options->remote_forwards[i].host); + options->num_remote_forwards = 0; +} + /* - * Returns the number of the token pointed to by cp of length len. Never - * returns if the token is not known. + * Returns the number of the token pointed to by cp or oBadOption. */ static OpCodes parse_token(const char *cp, const char *filename, int linenum) { - unsigned int i; + u_int i; for (i = 0; keywords[i].name; i++) if (strcasecmp(cp, keywords[i].name) == 0) return keywords[i].opcode; - fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", - filename, linenum, cp); + error("%s: line %d: Bad configuration option: %s", + filename, linenum, cp); return oBadOption; } @@ -231,40 +272,66 @@ parse_token(const char *cp, const char *filename, int linenum) * Processes a single option line as used in the configuration files. This * only sets those values that have not already been set. */ +#define WHITESPACE " \t\r\n" int process_config_line(Options *options, const char *host, char *line, const char *filename, int linenum, int *activep) { - char buf[256], *cp, *string, **charptr, *cp2; + char buf[256], *s, **charptr, *endofnumber, *keyword, *arg; int opcode, *intptr, value; + size_t len; u_short fwd_port, fwd_host_port; + char sfwd_host_port[6]; - /* Skip leading whitespace. */ - cp = line + strspn(line, WHITESPACE); - if (!*cp || *cp == '\n' || *cp == '#') - return 0; + /* Strip trailing whitespace */ + for(len = strlen(line) - 1; len > 0; len--) { + if (strchr(WHITESPACE, line[len]) == NULL) + break; + line[len] = '\0'; + } + s = line; /* Get the keyword. (Each line is supposed to begin with a keyword). */ - cp = strtok(cp, WHITESPACE); - opcode = parse_token(cp, filename, linenum); + keyword = strdelim(&s); + /* Ignore leading whitespace. */ + if (*keyword == '\0') + keyword = strdelim(&s); + if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') + return 0; + + opcode = parse_token(keyword, filename, linenum); switch (opcode) { case oBadOption: /* don't panic, but count bad options */ return -1; /* NOTREACHED */ + case oConnectTimeout: + intptr = &options->connection_timeout; +parse_time: + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%s line %d: missing time value.", + filename, linenum); + if ((value = convtime(arg)) == -1) + fatal("%s line %d: invalid time value.", + filename, linenum); + if (*intptr == -1) + *intptr = value; + break; + case oForwardAgent: intptr = &options->forward_agent; parse_flag: - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); value = 0; /* To avoid compiler warning... */ - if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0) + if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) value = 1; - else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0) + else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) value = 0; else fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); @@ -276,6 +343,10 @@ parse_flag: intptr = &options->forward_x11; goto parse_flag; + case oForwardX11Trusted: + intptr = &options->forward_x11_trusted; + goto parse_flag; + case oGatewayPorts: intptr = &options->gateway_ports; goto parse_flag; @@ -284,16 +355,20 @@ parse_flag: intptr = &options->use_privileged_port; goto parse_flag; - case oRhostsAuthentication: - intptr = &options->rhosts_authentication; - goto parse_flag; - case oPasswordAuthentication: intptr = &options->password_authentication; goto parse_flag; - case oDSAAuthentication: - intptr = &options->dsa_authentication; + case oKbdInteractiveAuthentication: + intptr = &options->kbd_interactive_authentication; + goto parse_flag; + + case oKbdInteractiveDevices: + charptr = &options->kbd_interactive_devices; + goto parse_string; + + case oPubkeyAuthentication: + intptr = &options->pubkey_authentication; goto parse_flag; case oRSAAuthentication: @@ -304,34 +379,20 @@ parse_flag: intptr = &options->rhosts_rsa_authentication; goto parse_flag; - case oTISAuthentication: - /* fallthrough, there is no difference on the client side */ - case oSkeyAuthentication: - intptr = &options->skey_authentication; - goto parse_flag; - -#ifdef KRB4 - case oKerberosAuthentication: - intptr = &options->kerberos_authentication; + case oHostbasedAuthentication: + intptr = &options->hostbased_authentication; goto parse_flag; -#endif /* KRB4 */ -#ifdef AFS - case oKerberosTgtPassing: - intptr = &options->kerberos_tgt_passing; + case oChallengeResponseAuthentication: + intptr = &options->challenge_response_authentication; goto parse_flag; - case oAFSTokenPassing: - intptr = &options->afs_token_passing; - goto parse_flag; -#endif - - case oFallBackToRsh: - intptr = &options->fallback_to_rsh; + case oGssAuthentication: + intptr = &options->gss_authentication; goto parse_flag; - case oUseRsh: - intptr = &options->use_rsh; + case oGssDelegateCreds: + intptr = &options->gss_deleg_creds; goto parse_flag; case oBatchMode: @@ -342,18 +403,23 @@ parse_flag: intptr = &options->check_host_ip; goto parse_flag; + case oVerifyHostKeyDNS: + intptr = &options->verify_host_key_dns; + goto parse_yesnoask; + case oStrictHostKeyChecking: intptr = &options->strict_host_key_checking; - cp = strtok(NULL, WHITESPACE); - if (!cp) - fatal("%.200s line %d: Missing yes/no argument.", - filename, linenum); +parse_yesnoask: + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing yes/no/ask argument.", + filename, linenum); value = 0; /* To avoid compiler warning... */ - if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0) + if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) value = 1; - else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0) + else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) value = 0; - else if (strcmp(cp, "ask") == 0) + else if (strcmp(arg, "ask") == 0) value = 2; else fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); @@ -365,8 +431,12 @@ parse_flag: intptr = &options->compression; goto parse_flag; - case oKeepAlives: - intptr = &options->keepalives; + case oTCPKeepAlive: + intptr = &options->tcp_keep_alive; + goto parse_flag; + + case oNoHostAuthenticationForLocalhost: + intptr = &options->no_host_authentication_for_localhost; goto parse_flag; case oNumberOfPasswordPrompts: @@ -377,22 +447,42 @@ parse_flag: intptr = &options->compression_level; goto parse_int; + case oRekeyLimit: + intptr = &options->rekey_limit; + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing argument.", filename, linenum); + if (arg[0] < '0' || arg[0] > '9') + fatal("%.200s line %d: Bad number.", filename, linenum); + value = strtol(arg, &endofnumber, 10); + if (arg == endofnumber) + fatal("%.200s line %d: Bad number.", filename, linenum); + switch (toupper(*endofnumber)) { + case 'K': + value *= 1<<10; + break; + case 'M': + value *= 1<<20; + break; + case 'G': + value *= 1<<30; + break; + } + if (*activep && *intptr == -1) + *intptr = value; + break; + case oIdentityFile: - case oIdentityFile2: - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); if (*activep) { - intptr = (opcode == oIdentityFile) ? - &options->num_identity_files : - &options->num_identity_files2; + intptr = &options->num_identity_files; if (*intptr >= SSH_MAX_IDENTITY_FILES) fatal("%.200s line %d: Too many identity files specified (max %d).", - filename, linenum, SSH_MAX_IDENTITY_FILES); - charptr = (opcode == oIdentityFile) ? - &options->identity_files[*intptr] : - &options->identity_files2[*intptr]; - *charptr = xstrdup(cp); + filename, linenum, SSH_MAX_IDENTITY_FILES); + charptr = &options->identity_files[*intptr]; + *charptr = xstrdup(arg); *intptr = *intptr + 1; } break; @@ -404,11 +494,11 @@ parse_flag: case oUser: charptr = &options->user; parse_string: - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); if (*activep && *charptr == NULL) - *charptr = xstrdup(cp); + *charptr = xstrdup(arg); break; case oGlobalKnownHostsFile: @@ -431,32 +521,43 @@ parse_string: charptr = &options->hostname; goto parse_string; + case oHostKeyAlias: + charptr = &options->host_key_alias; + goto parse_string; + + case oPreferredAuthentications: + charptr = &options->preferred_authentications; + goto parse_string; + + case oBindAddress: + charptr = &options->bind_address; + goto parse_string; + + case oSmartcardDevice: + charptr = &options->smartcard_device; + goto parse_string; + case oProxyCommand: + if (s == NULL) + fatal("%.200s line %d: Missing argument.", filename, linenum); charptr = &options->proxy_command; - string = xstrdup(""); - while ((cp = strtok(NULL, WHITESPACE)) != NULL) { - string = xrealloc(string, strlen(string) + strlen(cp) + 2); - strcat(string, " "); - strcat(string, cp); - } + len = strspn(s, WHITESPACE "="); if (*activep && *charptr == NULL) - *charptr = string; - else - xfree(string); + *charptr = xstrdup(s + len); return 0; case oPort: intptr = &options->port; parse_int: - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (cp[0] < '0' || cp[0] > '9') + if (arg[0] < '0' || arg[0] > '9') fatal("%.200s line %d: Bad number.", filename, linenum); /* Octal, decimal, or hex format? */ - value = strtol(cp, &cp2, 0); - if (cp == cp2) + value = strtol(arg, &endofnumber, 0); + if (arg == endofnumber) fatal("%.200s line %d: Bad number.", filename, linenum); if (*activep && *intptr == -1) *intptr = value; @@ -468,116 +569,147 @@ parse_int: case oCipher: intptr = &options->cipher; - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - value = cipher_number(cp); + value = cipher_number(arg); if (value == -1) fatal("%.200s line %d: Bad cipher '%s'.", - filename, linenum, cp ? cp : ""); + filename, linenum, arg ? arg : ""); if (*activep && *intptr == -1) *intptr = value; break; case oCiphers: - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (!ciphers_valid(cp)) + if (!ciphers_valid(arg)) fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", - filename, linenum, cp ? cp : ""); + filename, linenum, arg ? arg : ""); if (*activep && options->ciphers == NULL) - options->ciphers = xstrdup(cp); + options->ciphers = xstrdup(arg); + break; + + case oMacs: + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing argument.", filename, linenum); + if (!mac_valid(arg)) + fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", + filename, linenum, arg ? arg : ""); + if (*activep && options->macs == NULL) + options->macs = xstrdup(arg); + break; + + case oHostKeyAlgorithms: + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing argument.", filename, linenum); + if (!key_names_valid2(arg)) + fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", + filename, linenum, arg ? arg : ""); + if (*activep && options->hostkeyalgorithms == NULL) + options->hostkeyalgorithms = xstrdup(arg); break; case oProtocol: intptr = &options->protocol; - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - value = proto_spec(cp); + value = proto_spec(arg); if (value == SSH_PROTO_UNKNOWN) fatal("%.200s line %d: Bad protocol spec '%s'.", - filename, linenum, cp ? cp : ""); + filename, linenum, arg ? arg : ""); if (*activep && *intptr == SSH_PROTO_UNKNOWN) *intptr = value; break; case oLogLevel: intptr = (int *) &options->log_level; - cp = strtok(NULL, WHITESPACE); - value = log_level_number(cp); - if (value == (LogLevel) - 1) - fatal("%.200s line %d: unsupported log level '%s'\n", - filename, linenum, cp ? cp : ""); - if (*activep && (LogLevel) * intptr == -1) + arg = strdelim(&s); + value = log_level_number(arg); + if (value == SYSLOG_LEVEL_NOT_SET) + fatal("%.200s line %d: unsupported log level '%s'", + filename, linenum, arg ? arg : ""); + if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) *intptr = (LogLevel) value; break; + case oLocalForward: case oRemoteForward: - cp = strtok(NULL, WHITESPACE); - if (!cp) - fatal("%.200s line %d: Missing argument.", filename, linenum); - if (cp[0] < '0' || cp[0] > '9') - fatal("%.200s line %d: Badly formatted port number.", - filename, linenum); - fwd_port = atoi(cp); - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing port argument.", + filename, linenum); + if ((fwd_port = a2port(arg)) == 0) + fatal("%.200s line %d: Bad listen port.", + filename, linenum); + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing second argument.", - filename, linenum); - if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2) - fatal("%.200s line %d: Badly formatted host:port.", - filename, linenum); - if (*activep) - add_remote_forward(options, fwd_port, buf, fwd_host_port); + filename, linenum); + if (sscanf(arg, "%255[^:]:%5[0-9]", buf, sfwd_host_port) != 2 && + sscanf(arg, "%255[^/]/%5[0-9]", buf, sfwd_host_port) != 2) + fatal("%.200s line %d: Bad forwarding specification.", + filename, linenum); + if ((fwd_host_port = a2port(sfwd_host_port)) == 0) + fatal("%.200s line %d: Bad forwarding port.", + filename, linenum); + if (*activep) { + if (opcode == oLocalForward) + add_local_forward(options, fwd_port, buf, + fwd_host_port); + else if (opcode == oRemoteForward) + add_remote_forward(options, fwd_port, buf, + fwd_host_port); + } break; - case oLocalForward: - cp = strtok(NULL, WHITESPACE); - if (!cp) - fatal("%.200s line %d: Missing argument.", filename, linenum); - if (cp[0] < '0' || cp[0] > '9') + case oDynamicForward: + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing port argument.", + filename, linenum); + fwd_port = a2port(arg); + if (fwd_port == 0) fatal("%.200s line %d: Badly formatted port number.", - filename, linenum); - fwd_port = atoi(cp); - cp = strtok(NULL, WHITESPACE); - if (!cp) - fatal("%.200s line %d: Missing second argument.", - filename, linenum); - if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2) - fatal("%.200s line %d: Badly formatted host:port.", - filename, linenum); + filename, linenum); if (*activep) - add_local_forward(options, fwd_port, buf, fwd_host_port); + add_local_forward(options, fwd_port, "socks", 0); break; + case oClearAllForwardings: + intptr = &options->clear_forwardings; + goto parse_flag; + case oHost: *activep = 0; - while ((cp = strtok(NULL, WHITESPACE)) != NULL) - if (match_pattern(host, cp)) { - debug("Applying options for %.100s", cp); + while ((arg = strdelim(&s)) != NULL && *arg != '\0') + if (match_pattern(host, arg)) { + debug("Applying options for %.100s", arg); *activep = 1; break; } - /* Avoid garbage check below, as strtok already returned NULL. */ + /* Avoid garbage check below, as strdelim is done. */ return 0; case oEscapeChar: intptr = &options->escape_char; - cp = strtok(NULL, WHITESPACE); - if (!cp) + arg = strdelim(&s); + if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (cp[0] == '^' && cp[2] == 0 && - (unsigned char) cp[1] >= 64 && (unsigned char) cp[1] < 128) - value = (unsigned char) cp[1] & 31; - else if (strlen(cp) == 1) - value = (unsigned char) cp[0]; - else if (strcmp(cp, "none") == 0) - value = -2; + if (arg[0] == '^' && arg[2] == 0 && + (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) + value = (u_char) arg[1] & 31; + else if (strlen(arg) == 1) + value = (u_char) arg[0]; + else if (strcmp(arg, "none") == 0) + value = SSH_ESCAPECHAR_NONE; else { fatal("%.200s line %d: Bad escape character.", - filename, linenum); + filename, linenum); /* NOTREACHED */ value = 0; /* Avoid compiler warning. */ } @@ -585,14 +717,52 @@ parse_int: *intptr = value; break; + case oAddressFamily: + arg = strdelim(&s); + intptr = &options->address_family; + if (strcasecmp(arg, "inet") == 0) + value = AF_INET; + else if (strcasecmp(arg, "inet6") == 0) + value = AF_INET6; + else if (strcasecmp(arg, "any") == 0) + value = AF_UNSPEC; + else + fatal("Unsupported AddressFamily \"%s\"", arg); + if (*activep && *intptr == -1) + *intptr = value; + break; + + case oEnableSSHKeysign: + intptr = &options->enable_ssh_keysign; + goto parse_flag; + + case oServerAliveInterval: + intptr = &options->server_alive_interval; + goto parse_time; + + case oServerAliveCountMax: + intptr = &options->server_alive_count_max; + goto parse_int; + + case oDeprecated: + debug("%s line %d: Deprecated option \"%s\"", + filename, linenum, keyword); + return 0; + + case oUnsupported: + error("%s line %d: Unsupported option \"%s\"", + filename, linenum, keyword); + return 0; + default: fatal("process_config_line: Unimplemented opcode %d", opcode); } /* Check that there is no garbage at end of line. */ - if (strtok(NULL, WHITESPACE) != NULL) - fatal("%.200s line %d: garbage at end of line.", - filename, linenum); + if ((arg = strdelim(&s)) != NULL && *arg != '\0') { + fatal("%.200s line %d: garbage at end of line; \"%.200s\".", + filename, linenum, arg); + } return 0; } @@ -600,10 +770,10 @@ parse_int: /* * Reads the config file and modifies the options accordingly. Options * should already be initialized before this call. This never returns if - * there is an error. If the file does not exist, this returns immediately. + * there is an error. If the file does not exist, this returns 0. */ -void +int read_config_file(const char *filename, const char *host, Options *options) { FILE *f; @@ -614,7 +784,7 @@ read_config_file(const char *filename, const char *host, Options *options) /* Open the file. */ f = fopen(filename, "r"); if (!f) - return; + return 0; debug("Reading configuration data %.200s", filename); @@ -632,8 +802,9 @@ read_config_file(const char *filename, const char *host, Options *options) } fclose(f); if (bad_options > 0) - fatal("%s: terminating, %d bad configuration options\n", - filename, bad_options); + fatal("%s: terminating, %d bad configuration options", + filename, bad_options); + return 1; } /* @@ -649,39 +820,39 @@ initialize_options(Options * options) memset(options, 'X', sizeof(*options)); options->forward_agent = -1; options->forward_x11 = -1; + options->forward_x11_trusted = -1; options->xauth_location = NULL; options->gateway_ports = -1; options->use_privileged_port = -1; - options->rhosts_authentication = -1; options->rsa_authentication = -1; - options->dsa_authentication = -1; - options->skey_authentication = -1; -#ifdef KRB4 - options->kerberos_authentication = -1; -#endif -#ifdef AFS - options->kerberos_tgt_passing = -1; - options->afs_token_passing = -1; -#endif + options->pubkey_authentication = -1; + options->challenge_response_authentication = -1; + options->gss_authentication = -1; + options->gss_deleg_creds = -1; options->password_authentication = -1; + options->kbd_interactive_authentication = -1; + options->kbd_interactive_devices = NULL; options->rhosts_rsa_authentication = -1; - options->fallback_to_rsh = -1; - options->use_rsh = -1; + options->hostbased_authentication = -1; options->batch_mode = -1; options->check_host_ip = -1; options->strict_host_key_checking = -1; options->compression = -1; - options->keepalives = -1; + options->tcp_keep_alive = -1; options->compression_level = -1; options->port = -1; + options->address_family = -1; options->connection_attempts = -1; + options->connection_timeout = -1; options->number_of_password_prompts = -1; options->cipher = -1; options->ciphers = NULL; + options->macs = NULL; + options->hostkeyalgorithms = NULL; options->protocol = SSH_PROTO_UNKNOWN; options->num_identity_files = 0; - options->num_identity_files2 = 0; options->hostname = NULL; + options->host_key_alias = NULL; options->proxy_command = NULL; options->user = NULL; options->escape_char = -1; @@ -691,7 +862,17 @@ initialize_options(Options * options) options->user_hostfile2 = NULL; options->num_local_forwards = 0; options->num_remote_forwards = 0; - options->log_level = (LogLevel) - 1; + options->clear_forwardings = -1; + options->log_level = SYSLOG_LEVEL_NOT_SET; + options->preferred_authentications = NULL; + options->bind_address = NULL; + options->smartcard_device = NULL; + options->enable_ssh_keysign = - 1; + options->no_host_authentication_for_localhost = - 1; + options->rekey_limit = - 1; + options->verify_host_key_dns = -1; + options->server_alive_interval = -1; + options->server_alive_count_max = -1; } /* @@ -702,44 +883,38 @@ initialize_options(Options * options) void fill_default_options(Options * options) { + int len; + if (options->forward_agent == -1) options->forward_agent = 0; if (options->forward_x11 == -1) options->forward_x11 = 0; -#ifdef XAUTH_PATH + if (options->forward_x11_trusted == -1) + options->forward_x11_trusted = 0; if (options->xauth_location == NULL) - options->xauth_location = XAUTH_PATH; -#endif /* XAUTH_PATH */ + options->xauth_location = _PATH_XAUTH; if (options->gateway_ports == -1) options->gateway_ports = 0; if (options->use_privileged_port == -1) - options->use_privileged_port = 1; - if (options->rhosts_authentication == -1) - options->rhosts_authentication = 1; + options->use_privileged_port = 0; if (options->rsa_authentication == -1) options->rsa_authentication = 1; - if (options->dsa_authentication == -1) - options->dsa_authentication = 1; - if (options->skey_authentication == -1) - options->skey_authentication = 0; -#ifdef KRB4 - if (options->kerberos_authentication == -1) - options->kerberos_authentication = 1; -#endif /* KRB4 */ -#ifdef AFS - if (options->kerberos_tgt_passing == -1) - options->kerberos_tgt_passing = 1; - if (options->afs_token_passing == -1) - options->afs_token_passing = 1; -#endif /* AFS */ + if (options->pubkey_authentication == -1) + options->pubkey_authentication = 1; + if (options->challenge_response_authentication == -1) + options->challenge_response_authentication = 1; + if (options->gss_authentication == -1) + options->gss_authentication = 0; + if (options->gss_deleg_creds == -1) + options->gss_deleg_creds = 0; if (options->password_authentication == -1) options->password_authentication = 1; + if (options->kbd_interactive_authentication == -1) + options->kbd_interactive_authentication = 1; if (options->rhosts_rsa_authentication == -1) - options->rhosts_rsa_authentication = 1; - if (options->fallback_to_rsh == -1) - options->fallback_to_rsh = 1; - if (options->use_rsh == -1) - options->use_rsh = 0; + options->rhosts_rsa_authentication = 0; + if (options->hostbased_authentication == -1) + options->hostbased_authentication = 0; if (options->batch_mode == -1) options->batch_mode = 0; if (options->check_host_ip == -1) @@ -748,47 +923,77 @@ fill_default_options(Options * options) options->strict_host_key_checking = 2; /* 2 is default */ if (options->compression == -1) options->compression = 0; - if (options->keepalives == -1) - options->keepalives = 1; + if (options->tcp_keep_alive == -1) + options->tcp_keep_alive = 1; if (options->compression_level == -1) options->compression_level = 6; if (options->port == -1) options->port = 0; /* Filled in ssh_connect. */ + if (options->address_family == -1) + options->address_family = AF_UNSPEC; if (options->connection_attempts == -1) - options->connection_attempts = 4; + options->connection_attempts = 1; if (options->number_of_password_prompts == -1) options->number_of_password_prompts = 3; /* Selected in ssh_login(). */ if (options->cipher == -1) options->cipher = SSH_CIPHER_NOT_SET; /* options->ciphers, default set in myproposals.h */ + /* options->macs, default set in myproposals.h */ + /* options->hostkeyalgorithms, default set in myproposals.h */ if (options->protocol == SSH_PROTO_UNKNOWN) - options->protocol = SSH_PROTO_1|SSH_PROTO_2|SSH_PROTO_1_PREFERRED; + options->protocol = SSH_PROTO_1|SSH_PROTO_2; if (options->num_identity_files == 0) { - options->identity_files[0] = - xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1); - sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY); - options->num_identity_files = 1; - } - if (options->num_identity_files2 == 0) { - options->identity_files2[0] = - xmalloc(2 + strlen(SSH_CLIENT_ID_DSA) + 1); - sprintf(options->identity_files2[0], "~/%.100s", SSH_CLIENT_ID_DSA); - options->num_identity_files2 = 1; + if (options->protocol & SSH_PROTO_1) { + len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; + options->identity_files[options->num_identity_files] = + xmalloc(len); + snprintf(options->identity_files[options->num_identity_files++], + len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); + } + if (options->protocol & SSH_PROTO_2) { + len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; + options->identity_files[options->num_identity_files] = + xmalloc(len); + snprintf(options->identity_files[options->num_identity_files++], + len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); + + len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; + options->identity_files[options->num_identity_files] = + xmalloc(len); + snprintf(options->identity_files[options->num_identity_files++], + len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); + } } if (options->escape_char == -1) options->escape_char = '~'; if (options->system_hostfile == NULL) - options->system_hostfile = SSH_SYSTEM_HOSTFILE; + options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; if (options->user_hostfile == NULL) - options->user_hostfile = SSH_USER_HOSTFILE; + options->user_hostfile = _PATH_SSH_USER_HOSTFILE; if (options->system_hostfile2 == NULL) - options->system_hostfile2 = SSH_SYSTEM_HOSTFILE2; + options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; if (options->user_hostfile2 == NULL) - options->user_hostfile2 = SSH_USER_HOSTFILE2; - if (options->log_level == (LogLevel) - 1) + options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; + if (options->log_level == SYSLOG_LEVEL_NOT_SET) options->log_level = SYSLOG_LEVEL_INFO; + if (options->clear_forwardings == 1) + clear_forwardings(options); + if (options->no_host_authentication_for_localhost == - 1) + options->no_host_authentication_for_localhost = 0; + if (options->enable_ssh_keysign == -1) + options->enable_ssh_keysign = 0; + if (options->rekey_limit == -1) + options->rekey_limit = 0; + if (options->verify_host_key_dns == -1) + options->verify_host_key_dns = 0; + if (options->server_alive_interval == -1) + options->server_alive_interval = 0; + if (options->server_alive_count_max == -1) + options->server_alive_count_max = 3; /* options->proxy_command should not be set by default */ /* options->user will be set in the main program if appropriate */ /* options->hostname will be set in the main program if appropriate */ + /* options->host_key_alias should not be set by default */ + /* options->preferred_authentications will be set in ssh */ }