Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 4 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 5 | * Functions for reading the configuration files. |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 6 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 7 | * As far as I am concerned, the code I have written for this software |
| 8 | * can be used freely for any purpose. Any derived versions of this |
| 9 | * software must be clearly marked as such, and if the derived work is |
| 10 | * incompatible with the protocol description in the RFC file, it must be |
| 11 | * called by a name other than "ssh" or "Secure Shell". |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 12 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 13 | |
| 14 | #include "includes.h" |
Damien Miller | 57a4476 | 2004-04-20 20:11:57 +1000 | [diff] [blame^] | 15 | RCSID("$OpenBSD: readconf.c,v 1.129 2004/04/18 23:10:26 djm Exp $"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 16 | |
| 17 | #include "ssh.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 18 | #include "xmalloc.h" |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 19 | #include "compat.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 20 | #include "cipher.h" |
| 21 | #include "pathnames.h" |
| 22 | #include "log.h" |
| 23 | #include "readconf.h" |
| 24 | #include "match.h" |
| 25 | #include "misc.h" |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 26 | #include "kex.h" |
| 27 | #include "mac.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 28 | |
| 29 | /* Format of the configuration file: |
| 30 | |
| 31 | # Configuration data is parsed as follows: |
| 32 | # 1. command line options |
| 33 | # 2. user-specific file |
| 34 | # 3. system-wide file |
| 35 | # Any configuration value is only changed the first time it is set. |
| 36 | # Thus, host-specific definitions should be at the beginning of the |
| 37 | # configuration file, and defaults at the end. |
| 38 | |
| 39 | # Host-specific declarations. These may override anything above. A single |
| 40 | # host may match multiple declarations; these are processed in the order |
| 41 | # that they are given in. |
| 42 | |
| 43 | Host *.ngs.fi ngs.fi |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 44 | User foo |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 45 | |
| 46 | Host fake.com |
| 47 | HostName another.host.name.real.org |
| 48 | User blaah |
| 49 | Port 34289 |
| 50 | ForwardX11 no |
| 51 | ForwardAgent no |
| 52 | |
| 53 | Host books.com |
| 54 | RemoteForward 9999 shadows.cs.hut.fi:9999 |
| 55 | Cipher 3des |
| 56 | |
| 57 | Host fascist.blob.com |
| 58 | Port 23123 |
| 59 | User tylonen |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 60 | PasswordAuthentication no |
| 61 | |
| 62 | Host puukko.hut.fi |
| 63 | User t35124p |
| 64 | ProxyCommand ssh-proxy %h %p |
| 65 | |
| 66 | Host *.fr |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 67 | PublicKeyAuthentication no |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 68 | |
| 69 | Host *.su |
| 70 | Cipher none |
| 71 | PasswordAuthentication no |
| 72 | |
| 73 | # Defaults for various options |
| 74 | Host * |
| 75 | ForwardAgent no |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 76 | ForwardX11 no |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 77 | PasswordAuthentication yes |
| 78 | RSAAuthentication yes |
| 79 | RhostsRSAAuthentication yes |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 80 | StrictHostKeyChecking yes |
Damien Miller | 12c150e | 2003-12-17 16:31:10 +1100 | [diff] [blame] | 81 | TcpKeepAlive no |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 82 | IdentityFile ~/.ssh/identity |
| 83 | Port 22 |
| 84 | EscapeChar ~ |
| 85 | |
| 86 | */ |
| 87 | |
| 88 | /* Keyword tokens. */ |
| 89 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 90 | typedef enum { |
| 91 | oBadOption, |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 92 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
Ben Lindstrom | cb72e4f | 2002-06-21 00:41:51 +0000 | [diff] [blame] | 93 | oPasswordAuthentication, oRSAAuthentication, |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 94 | oChallengeResponseAuthentication, oXAuthLocation, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 95 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
| 96 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, |
| 97 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, |
| 98 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, |
Damien Miller | 12c150e | 2003-12-17 16:31:10 +1100 | [diff] [blame] | 99 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 100 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 101 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
Ben Lindstrom | b9be60a | 2001-03-11 01:49:19 +0000 | [diff] [blame] | 102 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 103 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
Ben Lindstrom | 2b7a0e9 | 2001-09-20 00:57:55 +0000 | [diff] [blame] | 104 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 105 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
Damien Miller | b78d5eb | 2003-05-16 11:39:04 +1000 | [diff] [blame] | 106 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 107 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
Damien Miller | bd394c3 | 2004-03-08 23:12:36 +1100 | [diff] [blame] | 108 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
Damien Miller | f9b3feb | 2003-05-16 11:38:32 +1000 | [diff] [blame] | 109 | oDeprecated, oUnsupported |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 110 | } OpCodes; |
| 111 | |
| 112 | /* Textual representations of the tokens. */ |
| 113 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 114 | static struct { |
| 115 | const char *name; |
| 116 | OpCodes opcode; |
| 117 | } keywords[] = { |
| 118 | { "forwardagent", oForwardAgent }, |
| 119 | { "forwardx11", oForwardX11 }, |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 120 | { "forwardx11trusted", oForwardX11Trusted }, |
Damien Miller | d3a1857 | 2000-06-07 19:55:44 +1000 | [diff] [blame] | 121 | { "xauthlocation", oXAuthLocation }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 122 | { "gatewayports", oGatewayPorts }, |
| 123 | { "useprivilegedport", oUsePrivilegedPort }, |
Darren Tucker | ec960f2 | 2003-08-13 20:37:05 +1000 | [diff] [blame] | 124 | { "rhostsauthentication", oDeprecated }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 125 | { "passwordauthentication", oPasswordAuthentication }, |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 126 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
| 127 | { "kbdinteractivedevices", oKbdInteractiveDevices }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 128 | { "rsaauthentication", oRSAAuthentication }, |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 129 | { "pubkeyauthentication", oPubkeyAuthentication }, |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 130 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 131 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
Ben Lindstrom | d69dab3 | 2001-04-12 23:36:05 +0000 | [diff] [blame] | 132 | { "hostbasedauthentication", oHostbasedAuthentication }, |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 133 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
| 134 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ |
| 135 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ |
Damien Miller | f9b3feb | 2003-05-16 11:38:32 +1000 | [diff] [blame] | 136 | { "kerberosauthentication", oUnsupported }, |
| 137 | { "kerberostgtpassing", oUnsupported }, |
Damien Miller | f9b3feb | 2003-05-16 11:38:32 +1000 | [diff] [blame] | 138 | { "afstokenpassing", oUnsupported }, |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 139 | #if defined(GSSAPI) |
| 140 | { "gssapiauthentication", oGssAuthentication }, |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 141 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
| 142 | #else |
| 143 | { "gssapiauthentication", oUnsupported }, |
| 144 | { "gssapidelegatecredentials", oUnsupported }, |
| 145 | #endif |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 146 | { "fallbacktorsh", oDeprecated }, |
| 147 | { "usersh", oDeprecated }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 148 | { "identityfile", oIdentityFile }, |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 149 | { "identityfile2", oIdentityFile }, /* alias */ |
Damien Miller | bd394c3 | 2004-03-08 23:12:36 +1100 | [diff] [blame] | 150 | { "identitiesonly", oIdentitiesOnly }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 151 | { "hostname", oHostName }, |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 152 | { "hostkeyalias", oHostKeyAlias }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 153 | { "proxycommand", oProxyCommand }, |
| 154 | { "port", oPort }, |
| 155 | { "cipher", oCipher }, |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 156 | { "ciphers", oCiphers }, |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 157 | { "macs", oMacs }, |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 158 | { "protocol", oProtocol }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 159 | { "remoteforward", oRemoteForward }, |
| 160 | { "localforward", oLocalForward }, |
| 161 | { "user", oUser }, |
| 162 | { "host", oHost }, |
| 163 | { "escapechar", oEscapeChar }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 164 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
Ben Lindstrom | d6481ea | 2001-06-25 04:37:41 +0000 | [diff] [blame] | 165 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 166 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
Ben Lindstrom | d6481ea | 2001-06-25 04:37:41 +0000 | [diff] [blame] | 167 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 168 | { "connectionattempts", oConnectionAttempts }, |
| 169 | { "batchmode", oBatchMode }, |
| 170 | { "checkhostip", oCheckHostIP }, |
| 171 | { "stricthostkeychecking", oStrictHostKeyChecking }, |
| 172 | { "compression", oCompression }, |
| 173 | { "compressionlevel", oCompressionLevel }, |
Damien Miller | 12c150e | 2003-12-17 16:31:10 +1100 | [diff] [blame] | 174 | { "tcpkeepalive", oTCPKeepAlive }, |
| 175 | { "keepalive", oTCPKeepAlive }, /* obsolete */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 176 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 177 | { "loglevel", oLogLevel }, |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 178 | { "dynamicforward", oDynamicForward }, |
Ben Lindstrom | b9be60a | 2001-03-11 01:49:19 +0000 | [diff] [blame] | 179 | { "preferredauthentications", oPreferredAuthentications }, |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 180 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
Ben Lindstrom | e0f8804 | 2001-04-30 13:06:24 +0000 | [diff] [blame] | 181 | { "bindaddress", oBindAddress }, |
Damien Miller | f9b3feb | 2003-05-16 11:38:32 +1000 | [diff] [blame] | 182 | #ifdef SMARTCARD |
Ben Lindstrom | ae996bf | 2001-08-06 21:27:53 +0000 | [diff] [blame] | 183 | { "smartcarddevice", oSmartcardDevice }, |
Damien Miller | f9b3feb | 2003-05-16 11:38:32 +1000 | [diff] [blame] | 184 | #else |
| 185 | { "smartcarddevice", oUnsupported }, |
| 186 | #endif |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 187 | { "clearallforwardings", oClearAllForwardings }, |
Ben Lindstrom | b6df73b | 2002-11-09 15:52:31 +0000 | [diff] [blame] | 188 | { "enablesshkeysign", oEnableSSHKeysign }, |
Damien Miller | 37876e9 | 2003-05-15 10:19:46 +1000 | [diff] [blame] | 189 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 190 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
Damien Miller | a5539d2 | 2003-04-09 20:50:06 +1000 | [diff] [blame] | 191 | { "rekeylimit", oRekeyLimit }, |
Damien Miller | b78d5eb | 2003-05-16 11:39:04 +1000 | [diff] [blame] | 192 | { "connecttimeout", oConnectTimeout }, |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 193 | { "addressfamily", oAddressFamily }, |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 194 | { "serveraliveinterval", oServerAliveInterval }, |
| 195 | { "serveralivecountmax", oServerAliveCountMax }, |
Ben Lindstrom | 65366a8 | 2001-12-06 16:32:47 +0000 | [diff] [blame] | 196 | { NULL, oBadOption } |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 197 | }; |
| 198 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 199 | /* |
| 200 | * Adds a local TCP/IP port forward to options. Never returns if there is an |
| 201 | * error. |
| 202 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 203 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 204 | void |
Damien Miller | aae6c61 | 1999-12-06 11:47:28 +1100 | [diff] [blame] | 205 | add_local_forward(Options *options, u_short port, const char *host, |
| 206 | u_short host_port) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 207 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 208 | Forward *fwd; |
Ben Lindstrom | 99a4e14 | 2002-07-09 14:06:40 +0000 | [diff] [blame] | 209 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 210 | extern uid_t original_real_uid; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 211 | if (port < IPPORT_RESERVED && original_real_uid != 0) |
Ben Lindstrom | 6df8ef4 | 2001-03-05 07:47:23 +0000 | [diff] [blame] | 212 | fatal("Privileged ports can only be forwarded by root."); |
Damien Miller | bac2d8a | 2000-09-05 16:13:06 +1100 | [diff] [blame] | 213 | #endif |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 214 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
| 215 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); |
| 216 | fwd = &options->local_forwards[options->num_local_forwards++]; |
| 217 | fwd->port = port; |
| 218 | fwd->host = xstrdup(host); |
| 219 | fwd->host_port = host_port; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 220 | } |
| 221 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 222 | /* |
| 223 | * Adds a remote TCP/IP port forward to options. Never returns if there is |
| 224 | * an error. |
| 225 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 226 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 227 | void |
Damien Miller | aae6c61 | 1999-12-06 11:47:28 +1100 | [diff] [blame] | 228 | add_remote_forward(Options *options, u_short port, const char *host, |
| 229 | u_short host_port) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 230 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 231 | Forward *fwd; |
| 232 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
| 233 | fatal("Too many remote forwards (max %d).", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 234 | SSH_MAX_FORWARDS_PER_DIRECTION); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 235 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
| 236 | fwd->port = port; |
| 237 | fwd->host = xstrdup(host); |
| 238 | fwd->host_port = host_port; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 239 | } |
| 240 | |
Ben Lindstrom | 2b7a0e9 | 2001-09-20 00:57:55 +0000 | [diff] [blame] | 241 | static void |
| 242 | clear_forwardings(Options *options) |
| 243 | { |
| 244 | int i; |
| 245 | |
| 246 | for (i = 0; i < options->num_local_forwards; i++) |
| 247 | xfree(options->local_forwards[i].host); |
| 248 | options->num_local_forwards = 0; |
| 249 | for (i = 0; i < options->num_remote_forwards; i++) |
| 250 | xfree(options->remote_forwards[i].host); |
| 251 | options->num_remote_forwards = 0; |
| 252 | } |
| 253 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 254 | /* |
Ben Lindstrom | 3704c26 | 2001-04-02 18:20:03 +0000 | [diff] [blame] | 255 | * Returns the number of the token pointed to by cp or oBadOption. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 256 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 257 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 258 | static OpCodes |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 259 | parse_token(const char *cp, const char *filename, int linenum) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 260 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 261 | u_int i; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 262 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 263 | for (i = 0; keywords[i].name; i++) |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 264 | if (strcasecmp(cp, keywords[i].name) == 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 265 | return keywords[i].opcode; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 266 | |
Ben Lindstrom | b5cdc66 | 2001-04-16 02:13:26 +0000 | [diff] [blame] | 267 | error("%s: line %d: Bad configuration option: %s", |
| 268 | filename, linenum, cp); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 269 | return oBadOption; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 270 | } |
| 271 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 272 | /* |
| 273 | * Processes a single option line as used in the configuration files. This |
| 274 | * only sets those values that have not already been set. |
| 275 | */ |
Damien Miller | 61f08ac | 2003-02-24 11:56:27 +1100 | [diff] [blame] | 276 | #define WHITESPACE " \t\r\n" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 277 | |
Damien Miller | 2ccf661 | 1999-11-15 15:25:10 +1100 | [diff] [blame] | 278 | int |
| 279 | process_config_line(Options *options, const char *host, |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 280 | char *line, const char *filename, int linenum, |
| 281 | int *activep) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 282 | { |
Damien Miller | 61f08ac | 2003-02-24 11:56:27 +1100 | [diff] [blame] | 283 | char buf[256], *s, **charptr, *endofnumber, *keyword, *arg; |
Damien Miller | aae6c61 | 1999-12-06 11:47:28 +1100 | [diff] [blame] | 284 | int opcode, *intptr, value; |
Damien Miller | 61f08ac | 2003-02-24 11:56:27 +1100 | [diff] [blame] | 285 | size_t len; |
Damien Miller | aae6c61 | 1999-12-06 11:47:28 +1100 | [diff] [blame] | 286 | u_short fwd_port, fwd_host_port; |
Ben Lindstrom | 62c25a4 | 2001-09-12 18:01:59 +0000 | [diff] [blame] | 287 | char sfwd_host_port[6]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 288 | |
Damien Miller | c652cac | 2003-05-14 13:40:54 +1000 | [diff] [blame] | 289 | /* Strip trailing whitespace */ |
| 290 | for(len = strlen(line) - 1; len > 0; len--) { |
| 291 | if (strchr(WHITESPACE, line[len]) == NULL) |
| 292 | break; |
| 293 | line[len] = '\0'; |
| 294 | } |
| 295 | |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 296 | s = line; |
| 297 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ |
| 298 | keyword = strdelim(&s); |
| 299 | /* Ignore leading whitespace. */ |
| 300 | if (*keyword == '\0') |
| 301 | keyword = strdelim(&s); |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 302 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 303 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 304 | |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 305 | opcode = parse_token(keyword, filename, linenum); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 306 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 307 | switch (opcode) { |
| 308 | case oBadOption: |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 309 | /* don't panic, but count bad options */ |
| 310 | return -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 311 | /* NOTREACHED */ |
Damien Miller | b78d5eb | 2003-05-16 11:39:04 +1000 | [diff] [blame] | 312 | case oConnectTimeout: |
| 313 | intptr = &options->connection_timeout; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 314 | parse_time: |
Damien Miller | b78d5eb | 2003-05-16 11:39:04 +1000 | [diff] [blame] | 315 | arg = strdelim(&s); |
| 316 | if (!arg || *arg == '\0') |
| 317 | fatal("%s line %d: missing time value.", |
| 318 | filename, linenum); |
| 319 | if ((value = convtime(arg)) == -1) |
| 320 | fatal("%s line %d: invalid time value.", |
| 321 | filename, linenum); |
| 322 | if (*intptr == -1) |
| 323 | *intptr = value; |
| 324 | break; |
| 325 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 326 | case oForwardAgent: |
| 327 | intptr = &options->forward_agent; |
| 328 | parse_flag: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 329 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 330 | if (!arg || *arg == '\0') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 331 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
| 332 | value = 0; /* To avoid compiler warning... */ |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 333 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 334 | value = 1; |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 335 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 336 | value = 0; |
| 337 | else |
| 338 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); |
| 339 | if (*activep && *intptr == -1) |
| 340 | *intptr = value; |
| 341 | break; |
| 342 | |
| 343 | case oForwardX11: |
| 344 | intptr = &options->forward_x11; |
| 345 | goto parse_flag; |
| 346 | |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 347 | case oForwardX11Trusted: |
| 348 | intptr = &options->forward_x11_trusted; |
| 349 | goto parse_flag; |
| 350 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 351 | case oGatewayPorts: |
| 352 | intptr = &options->gateway_ports; |
| 353 | goto parse_flag; |
| 354 | |
| 355 | case oUsePrivilegedPort: |
| 356 | intptr = &options->use_privileged_port; |
| 357 | goto parse_flag; |
| 358 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 359 | case oPasswordAuthentication: |
| 360 | intptr = &options->password_authentication; |
| 361 | goto parse_flag; |
| 362 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 363 | case oKbdInteractiveAuthentication: |
| 364 | intptr = &options->kbd_interactive_authentication; |
| 365 | goto parse_flag; |
| 366 | |
| 367 | case oKbdInteractiveDevices: |
| 368 | charptr = &options->kbd_interactive_devices; |
| 369 | goto parse_string; |
| 370 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 371 | case oPubkeyAuthentication: |
| 372 | intptr = &options->pubkey_authentication; |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 373 | goto parse_flag; |
| 374 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 375 | case oRSAAuthentication: |
| 376 | intptr = &options->rsa_authentication; |
| 377 | goto parse_flag; |
| 378 | |
| 379 | case oRhostsRSAAuthentication: |
| 380 | intptr = &options->rhosts_rsa_authentication; |
| 381 | goto parse_flag; |
| 382 | |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 383 | case oHostbasedAuthentication: |
| 384 | intptr = &options->hostbased_authentication; |
| 385 | goto parse_flag; |
| 386 | |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 387 | case oChallengeResponseAuthentication: |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 388 | intptr = &options->challenge_response_authentication; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 389 | goto parse_flag; |
Damien Miller | 2aa0ab4 | 2003-05-15 12:05:28 +1000 | [diff] [blame] | 390 | |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 391 | case oGssAuthentication: |
| 392 | intptr = &options->gss_authentication; |
| 393 | goto parse_flag; |
| 394 | |
| 395 | case oGssDelegateCreds: |
| 396 | intptr = &options->gss_deleg_creds; |
| 397 | goto parse_flag; |
| 398 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 399 | case oBatchMode: |
| 400 | intptr = &options->batch_mode; |
| 401 | goto parse_flag; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 402 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 403 | case oCheckHostIP: |
| 404 | intptr = &options->check_host_ip; |
| 405 | goto parse_flag; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 406 | |
Damien Miller | 37876e9 | 2003-05-15 10:19:46 +1000 | [diff] [blame] | 407 | case oVerifyHostKeyDNS: |
| 408 | intptr = &options->verify_host_key_dns; |
Damien Miller | 150b557 | 2003-11-17 21:19:29 +1100 | [diff] [blame] | 409 | goto parse_yesnoask; |
Damien Miller | 37876e9 | 2003-05-15 10:19:46 +1000 | [diff] [blame] | 410 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 411 | case oStrictHostKeyChecking: |
| 412 | intptr = &options->strict_host_key_checking; |
Damien Miller | 150b557 | 2003-11-17 21:19:29 +1100 | [diff] [blame] | 413 | parse_yesnoask: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 414 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 415 | if (!arg || *arg == '\0') |
Ben Lindstrom | 5ed8acd | 2001-01-29 08:00:54 +0000 | [diff] [blame] | 416 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 417 | filename, linenum); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 418 | value = 0; /* To avoid compiler warning... */ |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 419 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 420 | value = 1; |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 421 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 422 | value = 0; |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 423 | else if (strcmp(arg, "ask") == 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 424 | value = 2; |
| 425 | else |
| 426 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); |
| 427 | if (*activep && *intptr == -1) |
| 428 | *intptr = value; |
| 429 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 430 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 431 | case oCompression: |
| 432 | intptr = &options->compression; |
| 433 | goto parse_flag; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 434 | |
Damien Miller | 12c150e | 2003-12-17 16:31:10 +1100 | [diff] [blame] | 435 | case oTCPKeepAlive: |
| 436 | intptr = &options->tcp_keep_alive; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 437 | goto parse_flag; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 438 | |
Ben Lindstrom | 3cecc9a | 2001-10-03 17:39:38 +0000 | [diff] [blame] | 439 | case oNoHostAuthenticationForLocalhost: |
| 440 | intptr = &options->no_host_authentication_for_localhost; |
| 441 | goto parse_flag; |
| 442 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 443 | case oNumberOfPasswordPrompts: |
| 444 | intptr = &options->number_of_password_prompts; |
| 445 | goto parse_int; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 446 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 447 | case oCompressionLevel: |
| 448 | intptr = &options->compression_level; |
| 449 | goto parse_int; |
| 450 | |
Damien Miller | a5539d2 | 2003-04-09 20:50:06 +1000 | [diff] [blame] | 451 | case oRekeyLimit: |
| 452 | intptr = &options->rekey_limit; |
| 453 | arg = strdelim(&s); |
| 454 | if (!arg || *arg == '\0') |
| 455 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
| 456 | if (arg[0] < '0' || arg[0] > '9') |
| 457 | fatal("%.200s line %d: Bad number.", filename, linenum); |
| 458 | value = strtol(arg, &endofnumber, 10); |
| 459 | if (arg == endofnumber) |
| 460 | fatal("%.200s line %d: Bad number.", filename, linenum); |
| 461 | switch (toupper(*endofnumber)) { |
| 462 | case 'K': |
| 463 | value *= 1<<10; |
| 464 | break; |
| 465 | case 'M': |
| 466 | value *= 1<<20; |
| 467 | break; |
| 468 | case 'G': |
| 469 | value *= 1<<30; |
| 470 | break; |
| 471 | } |
| 472 | if (*activep && *intptr == -1) |
| 473 | *intptr = value; |
| 474 | break; |
| 475 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 476 | case oIdentityFile: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 477 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 478 | if (!arg || *arg == '\0') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 479 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
| 480 | if (*activep) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 481 | intptr = &options->num_identity_files; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 482 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 483 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 484 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 485 | charptr = &options->identity_files[*intptr]; |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 486 | *charptr = xstrdup(arg); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 487 | *intptr = *intptr + 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 488 | } |
| 489 | break; |
| 490 | |
Damien Miller | d3a1857 | 2000-06-07 19:55:44 +1000 | [diff] [blame] | 491 | case oXAuthLocation: |
| 492 | charptr=&options->xauth_location; |
| 493 | goto parse_string; |
| 494 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 495 | case oUser: |
| 496 | charptr = &options->user; |
| 497 | parse_string: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 498 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 499 | if (!arg || *arg == '\0') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 500 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
| 501 | if (*activep && *charptr == NULL) |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 502 | *charptr = xstrdup(arg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 503 | break; |
| 504 | |
| 505 | case oGlobalKnownHostsFile: |
| 506 | charptr = &options->system_hostfile; |
| 507 | goto parse_string; |
| 508 | |
| 509 | case oUserKnownHostsFile: |
| 510 | charptr = &options->user_hostfile; |
| 511 | goto parse_string; |
| 512 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 513 | case oGlobalKnownHostsFile2: |
| 514 | charptr = &options->system_hostfile2; |
| 515 | goto parse_string; |
| 516 | |
| 517 | case oUserKnownHostsFile2: |
| 518 | charptr = &options->user_hostfile2; |
| 519 | goto parse_string; |
| 520 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 521 | case oHostName: |
| 522 | charptr = &options->hostname; |
| 523 | goto parse_string; |
| 524 | |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 525 | case oHostKeyAlias: |
| 526 | charptr = &options->host_key_alias; |
| 527 | goto parse_string; |
| 528 | |
Ben Lindstrom | b9be60a | 2001-03-11 01:49:19 +0000 | [diff] [blame] | 529 | case oPreferredAuthentications: |
| 530 | charptr = &options->preferred_authentications; |
| 531 | goto parse_string; |
| 532 | |
Ben Lindstrom | e0f8804 | 2001-04-30 13:06:24 +0000 | [diff] [blame] | 533 | case oBindAddress: |
| 534 | charptr = &options->bind_address; |
| 535 | goto parse_string; |
| 536 | |
Ben Lindstrom | ae996bf | 2001-08-06 21:27:53 +0000 | [diff] [blame] | 537 | case oSmartcardDevice: |
Ben Lindstrom | f7db3bb | 2001-08-06 21:35:51 +0000 | [diff] [blame] | 538 | charptr = &options->smartcard_device; |
| 539 | goto parse_string; |
Ben Lindstrom | ae996bf | 2001-08-06 21:27:53 +0000 | [diff] [blame] | 540 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 541 | case oProxyCommand: |
Darren Tucker | a99c1b7 | 2003-06-28 12:40:12 +1000 | [diff] [blame] | 542 | if (s == NULL) |
| 543 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 544 | charptr = &options->proxy_command; |
Damien Miller | 61f08ac | 2003-02-24 11:56:27 +1100 | [diff] [blame] | 545 | len = strspn(s, WHITESPACE "="); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 546 | if (*activep && *charptr == NULL) |
Damien Miller | 61f08ac | 2003-02-24 11:56:27 +1100 | [diff] [blame] | 547 | *charptr = xstrdup(s + len); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 548 | return 0; |
| 549 | |
| 550 | case oPort: |
| 551 | intptr = &options->port; |
| 552 | parse_int: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 553 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 554 | if (!arg || *arg == '\0') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 555 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 556 | if (arg[0] < '0' || arg[0] > '9') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 557 | fatal("%.200s line %d: Bad number.", filename, linenum); |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 558 | |
| 559 | /* Octal, decimal, or hex format? */ |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 560 | value = strtol(arg, &endofnumber, 0); |
| 561 | if (arg == endofnumber) |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 562 | fatal("%.200s line %d: Bad number.", filename, linenum); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 563 | if (*activep && *intptr == -1) |
| 564 | *intptr = value; |
| 565 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 566 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 567 | case oConnectionAttempts: |
| 568 | intptr = &options->connection_attempts; |
| 569 | goto parse_int; |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 570 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 571 | case oCipher: |
| 572 | intptr = &options->cipher; |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 573 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 574 | if (!arg || *arg == '\0') |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 575 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 576 | value = cipher_number(arg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 577 | if (value == -1) |
| 578 | fatal("%.200s line %d: Bad cipher '%s'.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 579 | filename, linenum, arg ? arg : "<NONE>"); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 580 | if (*activep && *intptr == -1) |
| 581 | *intptr = value; |
| 582 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 583 | |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 584 | case oCiphers: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 585 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 586 | if (!arg || *arg == '\0') |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 587 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 588 | if (!ciphers_valid(arg)) |
Damien Miller | 30c3d42 | 2000-05-09 11:02:59 +1000 | [diff] [blame] | 589 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 590 | filename, linenum, arg ? arg : "<NONE>"); |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 591 | if (*activep && options->ciphers == NULL) |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 592 | options->ciphers = xstrdup(arg); |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 593 | break; |
| 594 | |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 595 | case oMacs: |
| 596 | arg = strdelim(&s); |
| 597 | if (!arg || *arg == '\0') |
| 598 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
| 599 | if (!mac_valid(arg)) |
| 600 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 601 | filename, linenum, arg ? arg : "<NONE>"); |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 602 | if (*activep && options->macs == NULL) |
| 603 | options->macs = xstrdup(arg); |
| 604 | break; |
| 605 | |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 606 | case oHostKeyAlgorithms: |
| 607 | arg = strdelim(&s); |
| 608 | if (!arg || *arg == '\0') |
| 609 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
| 610 | if (!key_names_valid2(arg)) |
| 611 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 612 | filename, linenum, arg ? arg : "<NONE>"); |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 613 | if (*activep && options->hostkeyalgorithms == NULL) |
| 614 | options->hostkeyalgorithms = xstrdup(arg); |
| 615 | break; |
| 616 | |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 617 | case oProtocol: |
| 618 | intptr = &options->protocol; |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 619 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 620 | if (!arg || *arg == '\0') |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 621 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 622 | value = proto_spec(arg); |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 623 | if (value == SSH_PROTO_UNKNOWN) |
| 624 | fatal("%.200s line %d: Bad protocol spec '%s'.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 625 | filename, linenum, arg ? arg : "<NONE>"); |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 626 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
| 627 | *intptr = value; |
| 628 | break; |
| 629 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 630 | case oLogLevel: |
| 631 | intptr = (int *) &options->log_level; |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 632 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 633 | value = log_level_number(arg); |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 634 | if (value == SYSLOG_LEVEL_NOT_SET) |
Ben Lindstrom | 6df8ef4 | 2001-03-05 07:47:23 +0000 | [diff] [blame] | 635 | fatal("%.200s line %d: unsupported log level '%s'", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 636 | filename, linenum, arg ? arg : "<NONE>"); |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 637 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 638 | *intptr = (LogLevel) value; |
| 639 | break; |
| 640 | |
Ben Lindstrom | 62c25a4 | 2001-09-12 18:01:59 +0000 | [diff] [blame] | 641 | case oLocalForward: |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 642 | case oRemoteForward: |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 643 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 644 | if (!arg || *arg == '\0') |
Ben Lindstrom | 62c25a4 | 2001-09-12 18:01:59 +0000 | [diff] [blame] | 645 | fatal("%.200s line %d: Missing port argument.", |
| 646 | filename, linenum); |
| 647 | if ((fwd_port = a2port(arg)) == 0) |
| 648 | fatal("%.200s line %d: Bad listen port.", |
| 649 | filename, linenum); |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 650 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 651 | if (!arg || *arg == '\0') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 652 | fatal("%.200s line %d: Missing second argument.", |
Ben Lindstrom | 62c25a4 | 2001-09-12 18:01:59 +0000 | [diff] [blame] | 653 | filename, linenum); |
| 654 | if (sscanf(arg, "%255[^:]:%5[0-9]", buf, sfwd_host_port) != 2 && |
| 655 | sscanf(arg, "%255[^/]/%5[0-9]", buf, sfwd_host_port) != 2) |
| 656 | fatal("%.200s line %d: Bad forwarding specification.", |
| 657 | filename, linenum); |
| 658 | if ((fwd_host_port = a2port(sfwd_host_port)) == 0) |
| 659 | fatal("%.200s line %d: Bad forwarding port.", |
| 660 | filename, linenum); |
| 661 | if (*activep) { |
| 662 | if (opcode == oLocalForward) |
| 663 | add_local_forward(options, fwd_port, buf, |
| 664 | fwd_host_port); |
| 665 | else if (opcode == oRemoteForward) |
| 666 | add_remote_forward(options, fwd_port, buf, |
| 667 | fwd_host_port); |
| 668 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 669 | break; |
| 670 | |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 671 | case oDynamicForward: |
| 672 | arg = strdelim(&s); |
| 673 | if (!arg || *arg == '\0') |
| 674 | fatal("%.200s line %d: Missing port argument.", |
| 675 | filename, linenum); |
Ben Lindstrom | 19066a1 | 2001-04-12 23:39:26 +0000 | [diff] [blame] | 676 | fwd_port = a2port(arg); |
| 677 | if (fwd_port == 0) |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 678 | fatal("%.200s line %d: Badly formatted port number.", |
| 679 | filename, linenum); |
Ben Lindstrom | 525a093 | 2001-09-12 17:35:27 +0000 | [diff] [blame] | 680 | if (*activep) |
Darren Tucker | 1c52ee3 | 2003-08-13 20:38:36 +1000 | [diff] [blame] | 681 | add_local_forward(options, fwd_port, "socks", 0); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 682 | break; |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 683 | |
Ben Lindstrom | 2b7a0e9 | 2001-09-20 00:57:55 +0000 | [diff] [blame] | 684 | case oClearAllForwardings: |
| 685 | intptr = &options->clear_forwardings; |
| 686 | goto parse_flag; |
| 687 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 688 | case oHost: |
| 689 | *activep = 0; |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 690 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 691 | if (match_pattern(host, arg)) { |
| 692 | debug("Applying options for %.100s", arg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 693 | *activep = 1; |
| 694 | break; |
| 695 | } |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 696 | /* Avoid garbage check below, as strdelim is done. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 697 | return 0; |
| 698 | |
| 699 | case oEscapeChar: |
| 700 | intptr = &options->escape_char; |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 701 | arg = strdelim(&s); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 702 | if (!arg || *arg == '\0') |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 703 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 704 | if (arg[0] == '^' && arg[2] == 0 && |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 705 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
| 706 | value = (u_char) arg[1] & 31; |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 707 | else if (strlen(arg) == 1) |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 708 | value = (u_char) arg[0]; |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 709 | else if (strcmp(arg, "none") == 0) |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 710 | value = SSH_ESCAPECHAR_NONE; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 711 | else { |
| 712 | fatal("%.200s line %d: Bad escape character.", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 713 | filename, linenum); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 714 | /* NOTREACHED */ |
| 715 | value = 0; /* Avoid compiler warning. */ |
| 716 | } |
| 717 | if (*activep && *intptr == -1) |
| 718 | *intptr = value; |
| 719 | break; |
| 720 | |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 721 | case oAddressFamily: |
| 722 | arg = strdelim(&s); |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 723 | intptr = &options->address_family; |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 724 | if (strcasecmp(arg, "inet") == 0) |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 725 | value = AF_INET; |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 726 | else if (strcasecmp(arg, "inet6") == 0) |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 727 | value = AF_INET6; |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 728 | else if (strcasecmp(arg, "any") == 0) |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 729 | value = AF_UNSPEC; |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 730 | else |
| 731 | fatal("Unsupported AddressFamily \"%s\"", arg); |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 732 | if (*activep && *intptr == -1) |
| 733 | *intptr = value; |
Damien Miller | 20a8f97 | 2003-05-18 20:50:30 +1000 | [diff] [blame] | 734 | break; |
| 735 | |
Ben Lindstrom | b6df73b | 2002-11-09 15:52:31 +0000 | [diff] [blame] | 736 | case oEnableSSHKeysign: |
| 737 | intptr = &options->enable_ssh_keysign; |
| 738 | goto parse_flag; |
| 739 | |
Damien Miller | bd394c3 | 2004-03-08 23:12:36 +1100 | [diff] [blame] | 740 | case oIdentitiesOnly: |
| 741 | intptr = &options->identities_only; |
| 742 | goto parse_flag; |
| 743 | |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 744 | case oServerAliveInterval: |
| 745 | intptr = &options->server_alive_interval; |
| 746 | goto parse_time; |
| 747 | |
| 748 | case oServerAliveCountMax: |
| 749 | intptr = &options->server_alive_count_max; |
| 750 | goto parse_int; |
| 751 | |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 752 | case oDeprecated: |
Ben Lindstrom | 2e17b08 | 2002-06-09 20:13:27 +0000 | [diff] [blame] | 753 | debug("%s line %d: Deprecated option \"%s\"", |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 754 | filename, linenum, keyword); |
Ben Lindstrom | 2e17b08 | 2002-06-09 20:13:27 +0000 | [diff] [blame] | 755 | return 0; |
Ben Lindstrom | 4daea86 | 2002-06-09 20:04:02 +0000 | [diff] [blame] | 756 | |
Damien Miller | f9b3feb | 2003-05-16 11:38:32 +1000 | [diff] [blame] | 757 | case oUnsupported: |
| 758 | error("%s line %d: Unsupported option \"%s\"", |
| 759 | filename, linenum, keyword); |
| 760 | return 0; |
| 761 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 762 | default: |
| 763 | fatal("process_config_line: Unimplemented opcode %d", opcode); |
| 764 | } |
| 765 | |
| 766 | /* Check that there is no garbage at end of line. */ |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 767 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 768 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 769 | filename, linenum, arg); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 770 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 771 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 775 | /* |
| 776 | * Reads the config file and modifies the options accordingly. Options |
| 777 | * should already be initialized before this call. This never returns if |
Ben Lindstrom | edc0cf2 | 2001-09-12 18:32:20 +0000 | [diff] [blame] | 778 | * there is an error. If the file does not exist, this returns 0. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 779 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 780 | |
Ben Lindstrom | edc0cf2 | 2001-09-12 18:32:20 +0000 | [diff] [blame] | 781 | int |
Damien Miller | 57a4476 | 2004-04-20 20:11:57 +1000 | [diff] [blame^] | 782 | read_config_file(const char *filename, const char *host, Options *options, |
| 783 | int checkperm) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 784 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 785 | FILE *f; |
| 786 | char line[1024]; |
| 787 | int active, linenum; |
| 788 | int bad_options = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 789 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 790 | /* Open the file. */ |
Damien Miller | 57a4476 | 2004-04-20 20:11:57 +1000 | [diff] [blame^] | 791 | if ((f = fopen(filename, "r")) == NULL) |
Ben Lindstrom | edc0cf2 | 2001-09-12 18:32:20 +0000 | [diff] [blame] | 792 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 793 | |
Damien Miller | 57a4476 | 2004-04-20 20:11:57 +1000 | [diff] [blame^] | 794 | if (checkperm) { |
| 795 | struct stat sb; |
| 796 | |
| 797 | if (fstat(fileno(f), &sb) == -1) { |
| 798 | fatal("fstat %s: %s", filename, strerror(errno)); |
| 799 | fclose(f); |
| 800 | return (0); |
| 801 | } |
| 802 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
| 803 | (sb.st_mode & 022) != 0)) { |
| 804 | fatal("Bad owner or permissions on %s", filename); |
| 805 | return 0; |
| 806 | } |
| 807 | } |
| 808 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 809 | debug("Reading configuration data %.200s", filename); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 810 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 811 | /* |
| 812 | * Mark that we are now processing the options. This flag is turned |
| 813 | * on/off by Host specifications. |
| 814 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 815 | active = 1; |
| 816 | linenum = 0; |
| 817 | while (fgets(line, sizeof(line), f)) { |
| 818 | /* Update line number counter. */ |
| 819 | linenum++; |
| 820 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) |
| 821 | bad_options++; |
| 822 | } |
| 823 | fclose(f); |
| 824 | if (bad_options > 0) |
Ben Lindstrom | 6df8ef4 | 2001-03-05 07:47:23 +0000 | [diff] [blame] | 825 | fatal("%s: terminating, %d bad configuration options", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 826 | filename, bad_options); |
Ben Lindstrom | edc0cf2 | 2001-09-12 18:32:20 +0000 | [diff] [blame] | 827 | return 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 828 | } |
| 829 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 830 | /* |
| 831 | * Initializes options to special values that indicate that they have not yet |
| 832 | * been set. Read_config_file will only set options with this value. Options |
| 833 | * are processed in the following order: command line, user config file, |
| 834 | * system config file. Last, fill_default_options is called. |
| 835 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 836 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 837 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 838 | initialize_options(Options * options) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 839 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 840 | memset(options, 'X', sizeof(*options)); |
| 841 | options->forward_agent = -1; |
| 842 | options->forward_x11 = -1; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 843 | options->forward_x11_trusted = -1; |
Damien Miller | d3a1857 | 2000-06-07 19:55:44 +1000 | [diff] [blame] | 844 | options->xauth_location = NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 845 | options->gateway_ports = -1; |
| 846 | options->use_privileged_port = -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 847 | options->rsa_authentication = -1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 848 | options->pubkey_authentication = -1; |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 849 | options->challenge_response_authentication = -1; |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 850 | options->gss_authentication = -1; |
| 851 | options->gss_deleg_creds = -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 852 | options->password_authentication = -1; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 853 | options->kbd_interactive_authentication = -1; |
| 854 | options->kbd_interactive_devices = NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 855 | options->rhosts_rsa_authentication = -1; |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 856 | options->hostbased_authentication = -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 857 | options->batch_mode = -1; |
| 858 | options->check_host_ip = -1; |
| 859 | options->strict_host_key_checking = -1; |
| 860 | options->compression = -1; |
Damien Miller | 12c150e | 2003-12-17 16:31:10 +1100 | [diff] [blame] | 861 | options->tcp_keep_alive = -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 862 | options->compression_level = -1; |
| 863 | options->port = -1; |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 864 | options->address_family = -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 865 | options->connection_attempts = -1; |
Damien Miller | b78d5eb | 2003-05-16 11:39:04 +1000 | [diff] [blame] | 866 | options->connection_timeout = -1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 867 | options->number_of_password_prompts = -1; |
| 868 | options->cipher = -1; |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 869 | options->ciphers = NULL; |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 870 | options->macs = NULL; |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 871 | options->hostkeyalgorithms = NULL; |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 872 | options->protocol = SSH_PROTO_UNKNOWN; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 873 | options->num_identity_files = 0; |
| 874 | options->hostname = NULL; |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 875 | options->host_key_alias = NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 876 | options->proxy_command = NULL; |
| 877 | options->user = NULL; |
| 878 | options->escape_char = -1; |
| 879 | options->system_hostfile = NULL; |
| 880 | options->user_hostfile = NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 881 | options->system_hostfile2 = NULL; |
| 882 | options->user_hostfile2 = NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 883 | options->num_local_forwards = 0; |
| 884 | options->num_remote_forwards = 0; |
Ben Lindstrom | 2b7a0e9 | 2001-09-20 00:57:55 +0000 | [diff] [blame] | 885 | options->clear_forwardings = -1; |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 886 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
Ben Lindstrom | b9be60a | 2001-03-11 01:49:19 +0000 | [diff] [blame] | 887 | options->preferred_authentications = NULL; |
Ben Lindstrom | e0f8804 | 2001-04-30 13:06:24 +0000 | [diff] [blame] | 888 | options->bind_address = NULL; |
Ben Lindstrom | f7db3bb | 2001-08-06 21:35:51 +0000 | [diff] [blame] | 889 | options->smartcard_device = NULL; |
Ben Lindstrom | b6df73b | 2002-11-09 15:52:31 +0000 | [diff] [blame] | 890 | options->enable_ssh_keysign = - 1; |
Ben Lindstrom | 3cecc9a | 2001-10-03 17:39:38 +0000 | [diff] [blame] | 891 | options->no_host_authentication_for_localhost = - 1; |
Damien Miller | bd394c3 | 2004-03-08 23:12:36 +1100 | [diff] [blame] | 892 | options->identities_only = - 1; |
Damien Miller | a5539d2 | 2003-04-09 20:50:06 +1000 | [diff] [blame] | 893 | options->rekey_limit = - 1; |
Damien Miller | 37876e9 | 2003-05-15 10:19:46 +1000 | [diff] [blame] | 894 | options->verify_host_key_dns = -1; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 895 | options->server_alive_interval = -1; |
| 896 | options->server_alive_count_max = -1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 897 | } |
| 898 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 899 | /* |
| 900 | * Called after processing other sources of option data, this fills those |
| 901 | * options for which no value has been specified with their default values. |
| 902 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 903 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 904 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 905 | fill_default_options(Options * options) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 906 | { |
Ben Lindstrom | 4f7a64a | 2001-02-10 22:50:09 +0000 | [diff] [blame] | 907 | int len; |
| 908 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 909 | if (options->forward_agent == -1) |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 910 | options->forward_agent = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 911 | if (options->forward_x11 == -1) |
Damien Miller | 98c7ad6 | 2000-03-09 21:27:49 +1100 | [diff] [blame] | 912 | options->forward_x11 = 0; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 913 | if (options->forward_x11_trusted == -1) |
| 914 | options->forward_x11_trusted = 0; |
Damien Miller | d3a1857 | 2000-06-07 19:55:44 +1000 | [diff] [blame] | 915 | if (options->xauth_location == NULL) |
Ben Lindstrom | 1bf11f6 | 2001-06-09 01:48:01 +0000 | [diff] [blame] | 916 | options->xauth_location = _PATH_XAUTH; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 917 | if (options->gateway_ports == -1) |
| 918 | options->gateway_ports = 0; |
| 919 | if (options->use_privileged_port == -1) |
Ben Lindstrom | cebc858 | 2001-03-08 03:39:10 +0000 | [diff] [blame] | 920 | options->use_privileged_port = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 921 | if (options->rsa_authentication == -1) |
| 922 | options->rsa_authentication = 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 923 | if (options->pubkey_authentication == -1) |
| 924 | options->pubkey_authentication = 1; |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 925 | if (options->challenge_response_authentication == -1) |
Ben Lindstrom | 0076d75 | 2001-08-06 20:53:26 +0000 | [diff] [blame] | 926 | options->challenge_response_authentication = 1; |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 927 | if (options->gss_authentication == -1) |
Darren Tucker | a044f47 | 2003-10-15 15:52:03 +1000 | [diff] [blame] | 928 | options->gss_authentication = 0; |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 929 | if (options->gss_deleg_creds == -1) |
| 930 | options->gss_deleg_creds = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 931 | if (options->password_authentication == -1) |
| 932 | options->password_authentication = 1; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 933 | if (options->kbd_interactive_authentication == -1) |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 934 | options->kbd_interactive_authentication = 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 935 | if (options->rhosts_rsa_authentication == -1) |
Ben Lindstrom | 2bf8276 | 2002-06-11 15:53:05 +0000 | [diff] [blame] | 936 | options->rhosts_rsa_authentication = 0; |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 937 | if (options->hostbased_authentication == -1) |
| 938 | options->hostbased_authentication = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 939 | if (options->batch_mode == -1) |
| 940 | options->batch_mode = 0; |
| 941 | if (options->check_host_ip == -1) |
| 942 | options->check_host_ip = 1; |
| 943 | if (options->strict_host_key_checking == -1) |
| 944 | options->strict_host_key_checking = 2; /* 2 is default */ |
| 945 | if (options->compression == -1) |
| 946 | options->compression = 0; |
Damien Miller | 12c150e | 2003-12-17 16:31:10 +1100 | [diff] [blame] | 947 | if (options->tcp_keep_alive == -1) |
| 948 | options->tcp_keep_alive = 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 949 | if (options->compression_level == -1) |
| 950 | options->compression_level = 6; |
| 951 | if (options->port == -1) |
| 952 | options->port = 0; /* Filled in ssh_connect. */ |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 953 | if (options->address_family == -1) |
| 954 | options->address_family = AF_UNSPEC; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 955 | if (options->connection_attempts == -1) |
Ben Lindstrom | f9cedb9 | 2001-08-06 21:07:11 +0000 | [diff] [blame] | 956 | options->connection_attempts = 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 957 | if (options->number_of_password_prompts == -1) |
| 958 | options->number_of_password_prompts = 3; |
| 959 | /* Selected in ssh_login(). */ |
| 960 | if (options->cipher == -1) |
| 961 | options->cipher = SSH_CIPHER_NOT_SET; |
Damien Miller | 30c3d42 | 2000-05-09 11:02:59 +1000 | [diff] [blame] | 962 | /* options->ciphers, default set in myproposals.h */ |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 963 | /* options->macs, default set in myproposals.h */ |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 964 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 965 | if (options->protocol == SSH_PROTO_UNKNOWN) |
Ben Lindstrom | 6b77643 | 2001-03-22 01:24:04 +0000 | [diff] [blame] | 966 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 967 | if (options->num_identity_files == 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 968 | if (options->protocol & SSH_PROTO_1) { |
Ben Lindstrom | 4f7a64a | 2001-02-10 22:50:09 +0000 | [diff] [blame] | 969 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 970 | options->identity_files[options->num_identity_files] = |
Ben Lindstrom | 4f7a64a | 2001-02-10 22:50:09 +0000 | [diff] [blame] | 971 | xmalloc(len); |
| 972 | snprintf(options->identity_files[options->num_identity_files++], |
| 973 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 974 | } |
| 975 | if (options->protocol & SSH_PROTO_2) { |
Ben Lindstrom | b00d4fb | 2001-03-05 06:03:03 +0000 | [diff] [blame] | 976 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
| 977 | options->identity_files[options->num_identity_files] = |
| 978 | xmalloc(len); |
| 979 | snprintf(options->identity_files[options->num_identity_files++], |
| 980 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); |
| 981 | |
Ben Lindstrom | 4f7a64a | 2001-02-10 22:50:09 +0000 | [diff] [blame] | 982 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 983 | options->identity_files[options->num_identity_files] = |
Ben Lindstrom | 4f7a64a | 2001-02-10 22:50:09 +0000 | [diff] [blame] | 984 | xmalloc(len); |
| 985 | snprintf(options->identity_files[options->num_identity_files++], |
| 986 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 987 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 988 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 989 | if (options->escape_char == -1) |
| 990 | options->escape_char = '~'; |
| 991 | if (options->system_hostfile == NULL) |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 992 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 993 | if (options->user_hostfile == NULL) |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 994 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 995 | if (options->system_hostfile2 == NULL) |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 996 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 997 | if (options->user_hostfile2 == NULL) |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 998 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 999 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 1000 | options->log_level = SYSLOG_LEVEL_INFO; |
Ben Lindstrom | 2b7a0e9 | 2001-09-20 00:57:55 +0000 | [diff] [blame] | 1001 | if (options->clear_forwardings == 1) |
| 1002 | clear_forwardings(options); |
Ben Lindstrom | 3cecc9a | 2001-10-03 17:39:38 +0000 | [diff] [blame] | 1003 | if (options->no_host_authentication_for_localhost == - 1) |
| 1004 | options->no_host_authentication_for_localhost = 0; |
Damien Miller | bd394c3 | 2004-03-08 23:12:36 +1100 | [diff] [blame] | 1005 | if (options->identities_only == -1) |
| 1006 | options->identities_only = 0; |
Ben Lindstrom | b6df73b | 2002-11-09 15:52:31 +0000 | [diff] [blame] | 1007 | if (options->enable_ssh_keysign == -1) |
| 1008 | options->enable_ssh_keysign = 0; |
Damien Miller | a5539d2 | 2003-04-09 20:50:06 +1000 | [diff] [blame] | 1009 | if (options->rekey_limit == -1) |
| 1010 | options->rekey_limit = 0; |
Damien Miller | 37876e9 | 2003-05-15 10:19:46 +1000 | [diff] [blame] | 1011 | if (options->verify_host_key_dns == -1) |
| 1012 | options->verify_host_key_dns = 0; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 1013 | if (options->server_alive_interval == -1) |
| 1014 | options->server_alive_interval = 0; |
| 1015 | if (options->server_alive_count_max == -1) |
| 1016 | options->server_alive_count_max = 3; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1017 | /* options->proxy_command should not be set by default */ |
| 1018 | /* options->user will be set in the main program if appropriate */ |
| 1019 | /* options->hostname will be set in the main program if appropriate */ |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 1020 | /* options->host_key_alias should not be set by default */ |
Ben Lindstrom | b9be60a | 2001-03-11 01:49:19 +0000 | [diff] [blame] | 1021 | /* options->preferred_authentications will be set in ssh */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1022 | } |