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bad23583 | 1 | /* $OpenBSD: readconf.c,v 1.181 2009/12/29 16:38:41 stevesk Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
5 | * All rights reserved | |
5260325f | 6 | * Functions for reading the configuration files. |
6ae2364d | 7 | * |
bcbf86ec | 8 | * As far as I am concerned, the code I have written for this software |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 13 | */ |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
4095f623 | 16 | |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
9794d008 | 19 | #include <sys/socket.h> |
20 | ||
21 | #include <netinet/in.h> | |
8efc0c15 | 22 | |
b6438382 | 23 | #include <ctype.h> |
028094f4 | 24 | #include <errno.h> |
28cb0a43 | 25 | #include <netdb.h> |
31652869 | 26 | #include <signal.h> |
24436b92 | 27 | #include <stdarg.h> |
cf851879 | 28 | #include <stdio.h> |
00146caa | 29 | #include <string.h> |
5188ba17 | 30 | #include <unistd.h> |
b6438382 | 31 | |
8efc0c15 | 32 | #include "xmalloc.h" |
31652869 | 33 | #include "ssh.h" |
a8be9f80 | 34 | #include "compat.h" |
42f11eb2 | 35 | #include "cipher.h" |
36 | #include "pathnames.h" | |
37 | #include "log.h" | |
31652869 | 38 | #include "key.h" |
42f11eb2 | 39 | #include "readconf.h" |
40 | #include "match.h" | |
41 | #include "misc.h" | |
31652869 | 42 | #include "buffer.h" |
b2552997 | 43 | #include "kex.h" |
44 | #include "mac.h" | |
8efc0c15 | 45 | |
46 | /* Format of the configuration file: | |
47 | ||
48 | # Configuration data is parsed as follows: | |
49 | # 1. command line options | |
50 | # 2. user-specific file | |
51 | # 3. system-wide file | |
52 | # Any configuration value is only changed the first time it is set. | |
53 | # Thus, host-specific definitions should be at the beginning of the | |
54 | # configuration file, and defaults at the end. | |
55 | ||
56 | # Host-specific declarations. These may override anything above. A single | |
57 | # host may match multiple declarations; these are processed in the order | |
58 | # that they are given in. | |
59 | ||
60 | Host *.ngs.fi ngs.fi | |
80fcb74e | 61 | User foo |
8efc0c15 | 62 | |
63 | Host fake.com | |
64 | HostName another.host.name.real.org | |
65 | User blaah | |
66 | Port 34289 | |
67 | ForwardX11 no | |
68 | ForwardAgent no | |
69 | ||
70 | Host books.com | |
71 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
72 | Cipher 3des | |
73 | ||
74 | Host fascist.blob.com | |
75 | Port 23123 | |
76 | User tylonen | |
8efc0c15 | 77 | PasswordAuthentication no |
78 | ||
79 | Host puukko.hut.fi | |
80 | User t35124p | |
81 | ProxyCommand ssh-proxy %h %p | |
82 | ||
83 | Host *.fr | |
80fcb74e | 84 | PublicKeyAuthentication no |
8efc0c15 | 85 | |
86 | Host *.su | |
87 | Cipher none | |
88 | PasswordAuthentication no | |
89 | ||
d20f3c9e | 90 | Host vpn.fake.com |
91 | Tunnel yes | |
92 | TunnelDevice 3 | |
93 | ||
8efc0c15 | 94 | # Defaults for various options |
95 | Host * | |
96 | ForwardAgent no | |
fa08c86b | 97 | ForwardX11 no |
8efc0c15 | 98 | PasswordAuthentication yes |
99 | RSAAuthentication yes | |
100 | RhostsRSAAuthentication yes | |
8efc0c15 | 101 | StrictHostKeyChecking yes |
fd573618 | 102 | TcpKeepAlive no |
8efc0c15 | 103 | IdentityFile ~/.ssh/identity |
104 | Port 22 | |
105 | EscapeChar ~ | |
106 | ||
107 | */ | |
108 | ||
109 | /* Keyword tokens. */ | |
110 | ||
5260325f | 111 | typedef enum { |
112 | oBadOption, | |
d73a67d7 | 113 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
42ea6f5e | 114 | oExitOnForwardFailure, |
7203d6bb | 115 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 116 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 117 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
118 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
119 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
120 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 121 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 122 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 123 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 124 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 125 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 126 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 127 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 128 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 129 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 130 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 131 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
d20f3c9e | 132 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
fe7dba42 | 133 | oVisualHostKey, oUseRoaming, oRDomain, |
134 | oZeroKnowledgePasswordAuthentication, oDeprecated, oUnsupported | |
8efc0c15 | 135 | } OpCodes; |
136 | ||
137 | /* Textual representations of the tokens. */ | |
138 | ||
5260325f | 139 | static struct { |
140 | const char *name; | |
141 | OpCodes opcode; | |
142 | } keywords[] = { | |
143 | { "forwardagent", oForwardAgent }, | |
144 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 145 | { "forwardx11trusted", oForwardX11Trusted }, |
42ea6f5e | 146 | { "exitonforwardfailure", oExitOnForwardFailure }, |
fa649821 | 147 | { "xauthlocation", oXAuthLocation }, |
5260325f | 148 | { "gatewayports", oGatewayPorts }, |
149 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 150 | { "rhostsauthentication", oDeprecated }, |
5260325f | 151 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 152 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
153 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 154 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 155 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 156 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 157 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 158 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 159 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
160 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
161 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 162 | { "kerberosauthentication", oUnsupported }, |
163 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 164 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 165 | #if defined(GSSAPI) |
166 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 167 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
168 | #else | |
169 | { "gssapiauthentication", oUnsupported }, | |
170 | { "gssapidelegatecredentials", oUnsupported }, | |
171 | #endif | |
80fcb74e | 172 | { "fallbacktorsh", oDeprecated }, |
173 | { "usersh", oDeprecated }, | |
5260325f | 174 | { "identityfile", oIdentityFile }, |
9b4b86c2 | 175 | { "identityfile2", oIdentityFile }, /* obsolete */ |
3a065ed0 | 176 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 177 | { "hostname", oHostName }, |
8abcdba4 | 178 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 179 | { "proxycommand", oProxyCommand }, |
180 | { "port", oPort }, | |
181 | { "cipher", oCipher }, | |
a8be9f80 | 182 | { "ciphers", oCiphers }, |
b2552997 | 183 | { "macs", oMacs }, |
a8be9f80 | 184 | { "protocol", oProtocol }, |
5260325f | 185 | { "remoteforward", oRemoteForward }, |
186 | { "localforward", oLocalForward }, | |
187 | { "user", oUser }, | |
188 | { "host", oHost }, | |
189 | { "escapechar", oEscapeChar }, | |
5260325f | 190 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
9b4b86c2 | 191 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */ |
192 | { "userknownhostsfile", oUserKnownHostsFile }, | |
f49bc4f7 | 193 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 194 | { "connectionattempts", oConnectionAttempts }, |
195 | { "batchmode", oBatchMode }, | |
196 | { "checkhostip", oCheckHostIP }, | |
197 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
198 | { "compression", oCompression }, | |
199 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 200 | { "tcpkeepalive", oTCPKeepAlive }, |
201 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 202 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 203 | { "loglevel", oLogLevel }, |
0490e609 | 204 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 205 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 206 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 207 | { "bindaddress", oBindAddress }, |
a2144546 | 208 | #ifdef SMARTCARD |
eea098a3 | 209 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 210 | #else |
211 | { "smartcarddevice", oUnsupported }, | |
212 | #endif | |
184eed6a | 213 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 214 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 215 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 216 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 217 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 218 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 219 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 220 | { "serveraliveinterval", oServerAliveInterval }, |
221 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 222 | { "sendenv", oSendEnv }, |
5e96b616 | 223 | { "controlpath", oControlPath }, |
224 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 225 | { "hashknownhosts", oHashKnownHosts }, |
d20f3c9e | 226 | { "tunnel", oTunnel }, |
227 | { "tunneldevice", oTunnelDevice }, | |
228 | { "localcommand", oLocalCommand }, | |
229 | { "permitlocalcommand", oPermitLocalCommand }, | |
7b3999b8 | 230 | { "visualhostkey", oVisualHostKey }, |
94c0aea4 | 231 | { "useroaming", oUseRoaming }, |
85fee9c0 | 232 | #ifdef USE_ROUTINGDOMAIN |
bad23583 | 233 | { "routingdomain", oRDomain }, |
85fee9c0 | 234 | #else |
235 | { "routingdomain", oUnsupported }, | |
236 | #endif | |
5adf6b9a | 237 | #ifdef JPAKE |
238 | { "zeroknowledgepasswordauthentication", | |
239 | oZeroKnowledgePasswordAuthentication }, | |
240 | #else | |
241 | { "zeroknowledgepasswordauthentication", oUnsupported }, | |
242 | #endif | |
243 | ||
17a3011c | 244 | { NULL, oBadOption } |
6a17f9c2 | 245 | }; |
246 | ||
aa3378df | 247 | /* |
248 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
249 | * error. | |
250 | */ | |
8efc0c15 | 251 | |
6ae2364d | 252 | void |
3867aa0a | 253 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 254 | { |
5260325f | 255 | Forward *fwd; |
e6f15ed1 | 256 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 257 | extern uid_t original_real_uid; |
3867aa0a | 258 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 259 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 260 | #endif |
5260325f | 261 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
262 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
263 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 264 | |
d35f707e | 265 | fwd->listen_host = newfwd->listen_host; |
3867aa0a | 266 | fwd->listen_port = newfwd->listen_port; |
d35f707e | 267 | fwd->connect_host = newfwd->connect_host; |
3867aa0a | 268 | fwd->connect_port = newfwd->connect_port; |
8efc0c15 | 269 | } |
270 | ||
aa3378df | 271 | /* |
272 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
273 | * an error. | |
274 | */ | |
8efc0c15 | 275 | |
6ae2364d | 276 | void |
3867aa0a | 277 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 278 | { |
5260325f | 279 | Forward *fwd; |
280 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
281 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 282 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 283 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
3867aa0a | 284 | |
d35f707e | 285 | fwd->listen_host = newfwd->listen_host; |
3867aa0a | 286 | fwd->listen_port = newfwd->listen_port; |
d35f707e | 287 | fwd->connect_host = newfwd->connect_host; |
3867aa0a | 288 | fwd->connect_port = newfwd->connect_port; |
8efc0c15 | 289 | } |
290 | ||
e1c5bfaf | 291 | static void |
292 | clear_forwardings(Options *options) | |
293 | { | |
294 | int i; | |
295 | ||
3867aa0a | 296 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 297 | if (options->local_forwards[i].listen_host != NULL) |
298 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 299 | xfree(options->local_forwards[i].connect_host); |
300 | } | |
e1c5bfaf | 301 | options->num_local_forwards = 0; |
3867aa0a | 302 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 303 | if (options->remote_forwards[i].listen_host != NULL) |
304 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 305 | xfree(options->remote_forwards[i].connect_host); |
306 | } | |
e1c5bfaf | 307 | options->num_remote_forwards = 0; |
a4f24bf8 | 308 | options->tun_open = SSH_TUNMODE_NO; |
e1c5bfaf | 309 | } |
310 | ||
aa3378df | 311 | /* |
6be9a5e8 | 312 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 313 | */ |
8efc0c15 | 314 | |
6ae2364d | 315 | static OpCodes |
5260325f | 316 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 317 | { |
1e3b8b07 | 318 | u_int i; |
8efc0c15 | 319 | |
5260325f | 320 | for (i = 0; keywords[i].name; i++) |
aa3378df | 321 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 322 | return keywords[i].opcode; |
8efc0c15 | 323 | |
b7c70970 | 324 | error("%s: line %d: Bad configuration option: %s", |
325 | filename, linenum, cp); | |
5260325f | 326 | return oBadOption; |
8efc0c15 | 327 | } |
328 | ||
aa3378df | 329 | /* |
330 | * Processes a single option line as used in the configuration files. This | |
331 | * only sets those values that have not already been set. | |
332 | */ | |
d718e75d | 333 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 334 | |
e7c0f9d5 | 335 | int |
336 | process_config_line(Options *options, const char *host, | |
5260325f | 337 | char *line, const char *filename, int linenum, |
338 | int *activep) | |
8efc0c15 | 339 | { |
3867aa0a | 340 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
129d5252 | 341 | int opcode, *intptr, value, value2, scale; |
2a72bc03 | 342 | LogLevel *log_level_ptr; |
129d5252 | 343 | long long orig, val64; |
d718e75d | 344 | size_t len; |
3867aa0a | 345 | Forward fwd; |
5260325f | 346 | |
204fde99 | 347 | /* Strip trailing whitespace */ |
f8cc7664 | 348 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 349 | if (strchr(WHITESPACE, line[len]) == NULL) |
350 | break; | |
351 | line[len] = '\0'; | |
352 | } | |
353 | ||
704b1659 | 354 | s = line; |
355 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
88299971 | 356 | if ((keyword = strdelim(&s)) == NULL) |
357 | return 0; | |
704b1659 | 358 | /* Ignore leading whitespace. */ |
359 | if (*keyword == '\0') | |
360 | keyword = strdelim(&s); | |
42f11eb2 | 361 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 362 | return 0; |
363 | ||
089fbbd2 | 364 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 365 | |
366 | switch (opcode) { | |
367 | case oBadOption: | |
aa3378df | 368 | /* don't panic, but count bad options */ |
369 | return -1; | |
5260325f | 370 | /* NOTREACHED */ |
09ab3296 | 371 | case oConnectTimeout: |
372 | intptr = &options->connection_timeout; | |
5d8d32a3 | 373 | parse_time: |
09ab3296 | 374 | arg = strdelim(&s); |
375 | if (!arg || *arg == '\0') | |
376 | fatal("%s line %d: missing time value.", | |
377 | filename, linenum); | |
378 | if ((value = convtime(arg)) == -1) | |
379 | fatal("%s line %d: invalid time value.", | |
380 | filename, linenum); | |
7f650171 | 381 | if (*activep && *intptr == -1) |
09ab3296 | 382 | *intptr = value; |
383 | break; | |
384 | ||
5260325f | 385 | case oForwardAgent: |
386 | intptr = &options->forward_agent; | |
387 | parse_flag: | |
704b1659 | 388 | arg = strdelim(&s); |
089fbbd2 | 389 | if (!arg || *arg == '\0') |
5260325f | 390 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
391 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 392 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 393 | value = 1; |
089fbbd2 | 394 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 395 | value = 0; |
396 | else | |
397 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
398 | if (*activep && *intptr == -1) | |
399 | *intptr = value; | |
400 | break; | |
401 | ||
402 | case oForwardX11: | |
403 | intptr = &options->forward_x11; | |
404 | goto parse_flag; | |
405 | ||
d73a67d7 | 406 | case oForwardX11Trusted: |
407 | intptr = &options->forward_x11_trusted; | |
408 | goto parse_flag; | |
409 | ||
5260325f | 410 | case oGatewayPorts: |
411 | intptr = &options->gateway_ports; | |
412 | goto parse_flag; | |
413 | ||
42ea6f5e | 414 | case oExitOnForwardFailure: |
415 | intptr = &options->exit_on_forward_failure; | |
416 | goto parse_flag; | |
417 | ||
5260325f | 418 | case oUsePrivilegedPort: |
419 | intptr = &options->use_privileged_port; | |
420 | goto parse_flag; | |
421 | ||
5260325f | 422 | case oPasswordAuthentication: |
423 | intptr = &options->password_authentication; | |
424 | goto parse_flag; | |
425 | ||
5adf6b9a | 426 | case oZeroKnowledgePasswordAuthentication: |
427 | intptr = &options->zero_knowledge_password_authentication; | |
428 | goto parse_flag; | |
429 | ||
94ec8c6b | 430 | case oKbdInteractiveAuthentication: |
431 | intptr = &options->kbd_interactive_authentication; | |
432 | goto parse_flag; | |
433 | ||
434 | case oKbdInteractiveDevices: | |
435 | charptr = &options->kbd_interactive_devices; | |
436 | goto parse_string; | |
437 | ||
fa08c86b | 438 | case oPubkeyAuthentication: |
439 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 440 | goto parse_flag; |
441 | ||
5260325f | 442 | case oRSAAuthentication: |
443 | intptr = &options->rsa_authentication; | |
444 | goto parse_flag; | |
445 | ||
446 | case oRhostsRSAAuthentication: | |
447 | intptr = &options->rhosts_rsa_authentication; | |
448 | goto parse_flag; | |
449 | ||
8002af61 | 450 | case oHostbasedAuthentication: |
451 | intptr = &options->hostbased_authentication; | |
452 | goto parse_flag; | |
453 | ||
d464095c | 454 | case oChallengeResponseAuthentication: |
5ba55ada | 455 | intptr = &options->challenge_response_authentication; |
5260325f | 456 | goto parse_flag; |
d0ec7f42 | 457 | |
7364bd04 | 458 | case oGssAuthentication: |
459 | intptr = &options->gss_authentication; | |
460 | goto parse_flag; | |
461 | ||
462 | case oGssDelegateCreds: | |
463 | intptr = &options->gss_deleg_creds; | |
464 | goto parse_flag; | |
465 | ||
5260325f | 466 | case oBatchMode: |
467 | intptr = &options->batch_mode; | |
468 | goto parse_flag; | |
469 | ||
470 | case oCheckHostIP: | |
471 | intptr = &options->check_host_ip; | |
7b3999b8 | 472 | goto parse_flag; |
5260325f | 473 | |
21289cd0 | 474 | case oVerifyHostKeyDNS: |
475 | intptr = &options->verify_host_key_dns; | |
0161a13d | 476 | goto parse_yesnoask; |
21289cd0 | 477 | |
5260325f | 478 | case oStrictHostKeyChecking: |
479 | intptr = &options->strict_host_key_checking; | |
0161a13d | 480 | parse_yesnoask: |
704b1659 | 481 | arg = strdelim(&s); |
089fbbd2 | 482 | if (!arg || *arg == '\0') |
c76c8819 | 483 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 484 | filename, linenum); |
5260325f | 485 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 486 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 487 | value = 1; |
089fbbd2 | 488 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 489 | value = 0; |
089fbbd2 | 490 | else if (strcmp(arg, "ask") == 0) |
5260325f | 491 | value = 2; |
492 | else | |
493 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
494 | if (*activep && *intptr == -1) | |
495 | *intptr = value; | |
496 | break; | |
497 | ||
498 | case oCompression: | |
499 | intptr = &options->compression; | |
500 | goto parse_flag; | |
501 | ||
fd573618 | 502 | case oTCPKeepAlive: |
503 | intptr = &options->tcp_keep_alive; | |
5260325f | 504 | goto parse_flag; |
505 | ||
8bbc048a | 506 | case oNoHostAuthenticationForLocalhost: |
507 | intptr = &options->no_host_authentication_for_localhost; | |
508 | goto parse_flag; | |
509 | ||
5260325f | 510 | case oNumberOfPasswordPrompts: |
511 | intptr = &options->number_of_password_prompts; | |
512 | goto parse_int; | |
513 | ||
514 | case oCompressionLevel: | |
515 | intptr = &options->compression_level; | |
516 | goto parse_int; | |
517 | ||
ffd7b36b | 518 | case oRekeyLimit: |
ffd7b36b | 519 | arg = strdelim(&s); |
520 | if (!arg || *arg == '\0') | |
521 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
522 | if (arg[0] < '0' || arg[0] > '9') | |
523 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
129d5252 | 524 | orig = val64 = strtoll(arg, &endofnumber, 10); |
ffd7b36b | 525 | if (arg == endofnumber) |
526 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
527 | switch (toupper(*endofnumber)) { | |
129d5252 | 528 | case '\0': |
529 | scale = 1; | |
530 | break; | |
ffd7b36b | 531 | case 'K': |
129d5252 | 532 | scale = 1<<10; |
ffd7b36b | 533 | break; |
534 | case 'M': | |
129d5252 | 535 | scale = 1<<20; |
ffd7b36b | 536 | break; |
537 | case 'G': | |
129d5252 | 538 | scale = 1<<30; |
ffd7b36b | 539 | break; |
129d5252 | 540 | default: |
541 | fatal("%.200s line %d: Invalid RekeyLimit suffix", | |
542 | filename, linenum); | |
ffd7b36b | 543 | } |
129d5252 | 544 | val64 *= scale; |
545 | /* detect integer wrap and too-large limits */ | |
fe771396 | 546 | if ((val64 / scale) != orig || val64 > UINT_MAX) |
129d5252 | 547 | fatal("%.200s line %d: RekeyLimit too large", |
548 | filename, linenum); | |
549 | if (val64 < 16) | |
550 | fatal("%.200s line %d: RekeyLimit too small", | |
551 | filename, linenum); | |
fe771396 | 552 | if (*activep && options->rekey_limit == -1) |
553 | options->rekey_limit = (u_int32_t)val64; | |
ffd7b36b | 554 | break; |
555 | ||
5260325f | 556 | case oIdentityFile: |
704b1659 | 557 | arg = strdelim(&s); |
089fbbd2 | 558 | if (!arg || *arg == '\0') |
5260325f | 559 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
560 | if (*activep) { | |
fa08c86b | 561 | intptr = &options->num_identity_files; |
a306f2dd | 562 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 563 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 564 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
0cf6a024 | 565 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 566 | *charptr = xstrdup(arg); |
a306f2dd | 567 | *intptr = *intptr + 1; |
5260325f | 568 | } |
569 | break; | |
570 | ||
fa649821 | 571 | case oXAuthLocation: |
572 | charptr=&options->xauth_location; | |
573 | goto parse_string; | |
574 | ||
5260325f | 575 | case oUser: |
576 | charptr = &options->user; | |
577 | parse_string: | |
704b1659 | 578 | arg = strdelim(&s); |
089fbbd2 | 579 | if (!arg || *arg == '\0') |
5260325f | 580 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
581 | if (*activep && *charptr == NULL) | |
089fbbd2 | 582 | *charptr = xstrdup(arg); |
5260325f | 583 | break; |
584 | ||
585 | case oGlobalKnownHostsFile: | |
586 | charptr = &options->system_hostfile; | |
587 | goto parse_string; | |
588 | ||
589 | case oUserKnownHostsFile: | |
590 | charptr = &options->user_hostfile; | |
591 | goto parse_string; | |
592 | ||
a306f2dd | 593 | case oGlobalKnownHostsFile2: |
594 | charptr = &options->system_hostfile2; | |
595 | goto parse_string; | |
596 | ||
597 | case oUserKnownHostsFile2: | |
598 | charptr = &options->user_hostfile2; | |
599 | goto parse_string; | |
600 | ||
5260325f | 601 | case oHostName: |
602 | charptr = &options->hostname; | |
603 | goto parse_string; | |
604 | ||
8abcdba4 | 605 | case oHostKeyAlias: |
606 | charptr = &options->host_key_alias; | |
607 | goto parse_string; | |
608 | ||
cab80f75 | 609 | case oPreferredAuthentications: |
610 | charptr = &options->preferred_authentications; | |
611 | goto parse_string; | |
612 | ||
3435f5a6 | 613 | case oBindAddress: |
614 | charptr = &options->bind_address; | |
615 | goto parse_string; | |
616 | ||
eea098a3 | 617 | case oSmartcardDevice: |
9ff6f66f | 618 | charptr = &options->smartcard_device; |
619 | goto parse_string; | |
eea098a3 | 620 | |
5260325f | 621 | case oProxyCommand: |
d20f3c9e | 622 | charptr = &options->proxy_command; |
623 | parse_command: | |
2d9c1828 | 624 | if (s == NULL) |
625 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
d718e75d | 626 | len = strspn(s, WHITESPACE "="); |
5260325f | 627 | if (*activep && *charptr == NULL) |
d718e75d | 628 | *charptr = xstrdup(s + len); |
5260325f | 629 | return 0; |
630 | ||
631 | case oPort: | |
632 | intptr = &options->port; | |
633 | parse_int: | |
704b1659 | 634 | arg = strdelim(&s); |
089fbbd2 | 635 | if (!arg || *arg == '\0') |
5260325f | 636 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 637 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 638 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 639 | |
640 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 641 | value = strtol(arg, &endofnumber, 0); |
642 | if (arg == endofnumber) | |
aa3378df | 643 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 644 | if (*activep && *intptr == -1) |
645 | *intptr = value; | |
646 | break; | |
647 | ||
648 | case oConnectionAttempts: | |
649 | intptr = &options->connection_attempts; | |
650 | goto parse_int; | |
651 | ||
652 | case oCipher: | |
653 | intptr = &options->cipher; | |
704b1659 | 654 | arg = strdelim(&s); |
089fbbd2 | 655 | if (!arg || *arg == '\0') |
71276795 | 656 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 657 | value = cipher_number(arg); |
5260325f | 658 | if (value == -1) |
659 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 660 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 661 | if (*activep && *intptr == -1) |
662 | *intptr = value; | |
663 | break; | |
664 | ||
a8be9f80 | 665 | case oCiphers: |
704b1659 | 666 | arg = strdelim(&s); |
089fbbd2 | 667 | if (!arg || *arg == '\0') |
71276795 | 668 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 669 | if (!ciphers_valid(arg)) |
d0c832f3 | 670 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 671 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 672 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 673 | options->ciphers = xstrdup(arg); |
a8be9f80 | 674 | break; |
675 | ||
b2552997 | 676 | case oMacs: |
677 | arg = strdelim(&s); | |
678 | if (!arg || *arg == '\0') | |
679 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
680 | if (!mac_valid(arg)) | |
681 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 682 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 683 | if (*activep && options->macs == NULL) |
684 | options->macs = xstrdup(arg); | |
685 | break; | |
686 | ||
e961a8f9 | 687 | case oHostKeyAlgorithms: |
688 | arg = strdelim(&s); | |
689 | if (!arg || *arg == '\0') | |
690 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
691 | if (!key_names_valid2(arg)) | |
692 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 693 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 694 | if (*activep && options->hostkeyalgorithms == NULL) |
695 | options->hostkeyalgorithms = xstrdup(arg); | |
696 | break; | |
697 | ||
a8be9f80 | 698 | case oProtocol: |
699 | intptr = &options->protocol; | |
704b1659 | 700 | arg = strdelim(&s); |
089fbbd2 | 701 | if (!arg || *arg == '\0') |
71276795 | 702 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 703 | value = proto_spec(arg); |
a8be9f80 | 704 | if (value == SSH_PROTO_UNKNOWN) |
705 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 706 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 707 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
708 | *intptr = value; | |
709 | break; | |
710 | ||
5260325f | 711 | case oLogLevel: |
2a72bc03 | 712 | log_level_ptr = &options->log_level; |
704b1659 | 713 | arg = strdelim(&s); |
089fbbd2 | 714 | value = log_level_number(arg); |
5eaf8578 | 715 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 716 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 717 | filename, linenum, arg ? arg : "<NONE>"); |
2a72bc03 | 718 | if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET) |
719 | *log_level_ptr = (LogLevel) value; | |
5260325f | 720 | break; |
721 | ||
5260325f | 722 | case oLocalForward: |
3a8aabf0 | 723 | case oRemoteForward: |
30573fea | 724 | case oDynamicForward: |
704b1659 | 725 | arg = strdelim(&s); |
3867aa0a | 726 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 727 | fatal("%.200s line %d: Missing port argument.", |
728 | filename, linenum); | |
3867aa0a | 729 | |
30573fea | 730 | if (opcode == oLocalForward || |
731 | opcode == oRemoteForward) { | |
732 | arg2 = strdelim(&s); | |
733 | if (arg2 == NULL || *arg2 == '\0') | |
734 | fatal("%.200s line %d: Missing target argument.", | |
735 | filename, linenum); | |
3867aa0a | 736 | |
30573fea | 737 | /* construct a string for parse_forward */ |
738 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
739 | } else if (opcode == oDynamicForward) { | |
740 | strlcpy(fwdarg, arg, sizeof(fwdarg)); | |
741 | } | |
742 | ||
743 | if (parse_forward(&fwd, fwdarg, | |
17525a70 | 744 | opcode == oDynamicForward ? 1 : 0, |
745 | opcode == oRemoteForward ? 1 : 0) == 0) | |
3a8aabf0 | 746 | fatal("%.200s line %d: Bad forwarding specification.", |
747 | filename, linenum); | |
3867aa0a | 748 | |
3a8aabf0 | 749 | if (*activep) { |
30573fea | 750 | if (opcode == oLocalForward || |
751 | opcode == oDynamicForward) | |
3867aa0a | 752 | add_local_forward(options, &fwd); |
3a8aabf0 | 753 | else if (opcode == oRemoteForward) |
3867aa0a | 754 | add_remote_forward(options, &fwd); |
3a8aabf0 | 755 | } |
5260325f | 756 | break; |
757 | ||
e1c5bfaf | 758 | case oClearAllForwardings: |
759 | intptr = &options->clear_forwardings; | |
760 | goto parse_flag; | |
761 | ||
5260325f | 762 | case oHost: |
763 | *activep = 0; | |
704b1659 | 764 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 765 | if (match_pattern(host, arg)) { |
766 | debug("Applying options for %.100s", arg); | |
5260325f | 767 | *activep = 1; |
768 | break; | |
769 | } | |
704b1659 | 770 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 771 | return 0; |
772 | ||
773 | case oEscapeChar: | |
774 | intptr = &options->escape_char; | |
704b1659 | 775 | arg = strdelim(&s); |
089fbbd2 | 776 | if (!arg || *arg == '\0') |
5260325f | 777 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 778 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 779 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
780 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 781 | else if (strlen(arg) == 1) |
1e3b8b07 | 782 | value = (u_char) arg[0]; |
089fbbd2 | 783 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 784 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 785 | else { |
786 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 787 | filename, linenum); |
5260325f | 788 | /* NOTREACHED */ |
789 | value = 0; /* Avoid compiler warning. */ | |
790 | } | |
791 | if (*activep && *intptr == -1) | |
792 | *intptr = value; | |
793 | break; | |
794 | ||
f811e52a | 795 | case oAddressFamily: |
796 | arg = strdelim(&s); | |
38634ff6 | 797 | if (!arg || *arg == '\0') |
798 | fatal("%s line %d: missing address family.", | |
799 | filename, linenum); | |
1572b90f | 800 | intptr = &options->address_family; |
f811e52a | 801 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 802 | value = AF_INET; |
f811e52a | 803 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 804 | value = AF_INET6; |
f811e52a | 805 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 806 | value = AF_UNSPEC; |
f811e52a | 807 | else |
808 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 809 | if (*activep && *intptr == -1) |
810 | *intptr = value; | |
f811e52a | 811 | break; |
812 | ||
cc46e2ee | 813 | case oEnableSSHKeysign: |
814 | intptr = &options->enable_ssh_keysign; | |
815 | goto parse_flag; | |
816 | ||
3a065ed0 | 817 | case oIdentitiesOnly: |
818 | intptr = &options->identities_only; | |
819 | goto parse_flag; | |
820 | ||
5d8d32a3 | 821 | case oServerAliveInterval: |
822 | intptr = &options->server_alive_interval; | |
823 | goto parse_time; | |
824 | ||
825 | case oServerAliveCountMax: | |
826 | intptr = &options->server_alive_count_max; | |
827 | goto parse_int; | |
828 | ||
61a2c1da | 829 | case oSendEnv: |
830 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
831 | if (strchr(arg, '=') != NULL) | |
832 | fatal("%s line %d: Invalid environment name.", | |
833 | filename, linenum); | |
c8c99dd5 | 834 | if (!*activep) |
835 | continue; | |
61a2c1da | 836 | if (options->num_send_env >= MAX_SEND_ENV) |
837 | fatal("%s line %d: too many send env.", | |
838 | filename, linenum); | |
839 | options->send_env[options->num_send_env++] = | |
840 | xstrdup(arg); | |
841 | } | |
842 | break; | |
843 | ||
5e96b616 | 844 | case oControlPath: |
845 | charptr = &options->control_path; | |
846 | goto parse_string; | |
847 | ||
848 | case oControlMaster: | |
849 | intptr = &options->control_master; | |
9dfd96d6 | 850 | arg = strdelim(&s); |
851 | if (!arg || *arg == '\0') | |
852 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
853 | filename, linenum); | |
854 | value = 0; /* To avoid compiler warning... */ | |
855 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
856 | value = SSHCTL_MASTER_YES; | |
857 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
858 | value = SSHCTL_MASTER_NO; | |
859 | else if (strcmp(arg, "auto") == 0) | |
860 | value = SSHCTL_MASTER_AUTO; | |
861 | else if (strcmp(arg, "ask") == 0) | |
862 | value = SSHCTL_MASTER_ASK; | |
863 | else if (strcmp(arg, "autoask") == 0) | |
864 | value = SSHCTL_MASTER_AUTO_ASK; | |
865 | else | |
866 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
867 | filename, linenum); | |
868 | if (*activep && *intptr == -1) | |
869 | *intptr = value; | |
870 | break; | |
5e96b616 | 871 | |
5c63c2ab | 872 | case oHashKnownHosts: |
873 | intptr = &options->hash_known_hosts; | |
874 | goto parse_flag; | |
875 | ||
d20f3c9e | 876 | case oTunnel: |
877 | intptr = &options->tun_open; | |
a4f24bf8 | 878 | arg = strdelim(&s); |
879 | if (!arg || *arg == '\0') | |
880 | fatal("%s line %d: Missing yes/point-to-point/" | |
881 | "ethernet/no argument.", filename, linenum); | |
882 | value = 0; /* silence compiler */ | |
883 | if (strcasecmp(arg, "ethernet") == 0) | |
884 | value = SSH_TUNMODE_ETHERNET; | |
885 | else if (strcasecmp(arg, "point-to-point") == 0) | |
886 | value = SSH_TUNMODE_POINTOPOINT; | |
887 | else if (strcasecmp(arg, "yes") == 0) | |
888 | value = SSH_TUNMODE_DEFAULT; | |
889 | else if (strcasecmp(arg, "no") == 0) | |
890 | value = SSH_TUNMODE_NO; | |
891 | else | |
892 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
893 | "no argument: %s", filename, linenum, arg); | |
894 | if (*activep) | |
895 | *intptr = value; | |
896 | break; | |
d20f3c9e | 897 | |
898 | case oTunnelDevice: | |
899 | arg = strdelim(&s); | |
900 | if (!arg || *arg == '\0') | |
901 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
902 | value = a2tun(arg, &value2); | |
a4f24bf8 | 903 | if (value == SSH_TUNID_ERR) |
d20f3c9e | 904 | fatal("%.200s line %d: Bad tun device.", filename, linenum); |
905 | if (*activep) { | |
906 | options->tun_local = value; | |
907 | options->tun_remote = value2; | |
908 | } | |
909 | break; | |
910 | ||
911 | case oLocalCommand: | |
912 | charptr = &options->local_command; | |
913 | goto parse_command; | |
914 | ||
915 | case oPermitLocalCommand: | |
916 | intptr = &options->permit_local_command; | |
917 | goto parse_flag; | |
918 | ||
7b3999b8 | 919 | case oVisualHostKey: |
920 | intptr = &options->visual_host_key; | |
921 | goto parse_flag; | |
922 | ||
94c0aea4 | 923 | case oUseRoaming: |
924 | intptr = &options->use_roaming; | |
925 | goto parse_flag; | |
926 | ||
85fee9c0 | 927 | #ifdef USE_ROUTINGDOMAIN |
fe7dba42 | 928 | case oRDomain: |
929 | arg = strdelim(&s); | |
930 | if (!arg || *arg == '\0') | |
931 | fatal("%.200s line %d: Missing argument.", | |
932 | filename, linenum); | |
9e622dcd | 933 | value = a2rdomain(arg); |
fe7dba42 | 934 | if (value == -1) |
935 | fatal("%.200s line %d: Bad rdomain.", | |
936 | filename, linenum); | |
937 | if (*activep) | |
938 | options->rdomain = value; | |
939 | break; | |
85fee9c0 | 940 | #endif |
fe7dba42 | 941 | |
80fcb74e | 942 | case oDeprecated: |
4feae93d | 943 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 944 | filename, linenum, keyword); |
4feae93d | 945 | return 0; |
80fcb74e | 946 | |
a2144546 | 947 | case oUnsupported: |
948 | error("%s line %d: Unsupported option \"%s\"", | |
949 | filename, linenum, keyword); | |
950 | return 0; | |
951 | ||
5260325f | 952 | default: |
953 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
954 | } | |
955 | ||
956 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 957 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 958 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
4e2e5cfd | 959 | filename, linenum, arg); |
089fbbd2 | 960 | } |
5260325f | 961 | return 0; |
8efc0c15 | 962 | } |
963 | ||
964 | ||
aa3378df | 965 | /* |
966 | * Reads the config file and modifies the options accordingly. Options | |
967 | * should already be initialized before this call. This never returns if | |
93111dfa | 968 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 969 | */ |
8efc0c15 | 970 | |
93111dfa | 971 | int |
f2107e97 | 972 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 973 | int checkperm) |
8efc0c15 | 974 | { |
5260325f | 975 | FILE *f; |
976 | char line[1024]; | |
977 | int active, linenum; | |
978 | int bad_options = 0; | |
979 | ||
9f6cab4b | 980 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 981 | return 0; |
5260325f | 982 | |
9f6cab4b | 983 | if (checkperm) { |
984 | struct stat sb; | |
f2107e97 | 985 | |
f9ee425b | 986 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 987 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 988 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 989 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 990 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 991 | } |
992 | ||
5260325f | 993 | debug("Reading configuration data %.200s", filename); |
994 | ||
aa3378df | 995 | /* |
996 | * Mark that we are now processing the options. This flag is turned | |
997 | * on/off by Host specifications. | |
998 | */ | |
5260325f | 999 | active = 1; |
1000 | linenum = 0; | |
1001 | while (fgets(line, sizeof(line), f)) { | |
1002 | /* Update line number counter. */ | |
1003 | linenum++; | |
1004 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
1005 | bad_options++; | |
1006 | } | |
1007 | fclose(f); | |
1008 | if (bad_options > 0) | |
54b974dc | 1009 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 1010 | filename, bad_options); |
93111dfa | 1011 | return 1; |
8efc0c15 | 1012 | } |
1013 | ||
aa3378df | 1014 | /* |
1015 | * Initializes options to special values that indicate that they have not yet | |
1016 | * been set. Read_config_file will only set options with this value. Options | |
1017 | * are processed in the following order: command line, user config file, | |
1018 | * system config file. Last, fill_default_options is called. | |
1019 | */ | |
8efc0c15 | 1020 | |
6ae2364d | 1021 | void |
5260325f | 1022 | initialize_options(Options * options) |
8efc0c15 | 1023 | { |
5260325f | 1024 | memset(options, 'X', sizeof(*options)); |
1025 | options->forward_agent = -1; | |
1026 | options->forward_x11 = -1; | |
d73a67d7 | 1027 | options->forward_x11_trusted = -1; |
42ea6f5e | 1028 | options->exit_on_forward_failure = -1; |
fa649821 | 1029 | options->xauth_location = NULL; |
5260325f | 1030 | options->gateway_ports = -1; |
1031 | options->use_privileged_port = -1; | |
5260325f | 1032 | options->rsa_authentication = -1; |
fa08c86b | 1033 | options->pubkey_authentication = -1; |
5ba55ada | 1034 | options->challenge_response_authentication = -1; |
7364bd04 | 1035 | options->gss_authentication = -1; |
1036 | options->gss_deleg_creds = -1; | |
5260325f | 1037 | options->password_authentication = -1; |
94ec8c6b | 1038 | options->kbd_interactive_authentication = -1; |
1039 | options->kbd_interactive_devices = NULL; | |
5260325f | 1040 | options->rhosts_rsa_authentication = -1; |
8002af61 | 1041 | options->hostbased_authentication = -1; |
5260325f | 1042 | options->batch_mode = -1; |
1043 | options->check_host_ip = -1; | |
1044 | options->strict_host_key_checking = -1; | |
1045 | options->compression = -1; | |
fd573618 | 1046 | options->tcp_keep_alive = -1; |
5260325f | 1047 | options->compression_level = -1; |
1048 | options->port = -1; | |
1572b90f | 1049 | options->address_family = -1; |
5260325f | 1050 | options->connection_attempts = -1; |
09ab3296 | 1051 | options->connection_timeout = -1; |
5260325f | 1052 | options->number_of_password_prompts = -1; |
1053 | options->cipher = -1; | |
a8be9f80 | 1054 | options->ciphers = NULL; |
b2552997 | 1055 | options->macs = NULL; |
e961a8f9 | 1056 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 1057 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 1058 | options->num_identity_files = 0; |
1059 | options->hostname = NULL; | |
8abcdba4 | 1060 | options->host_key_alias = NULL; |
5260325f | 1061 | options->proxy_command = NULL; |
1062 | options->user = NULL; | |
1063 | options->escape_char = -1; | |
1064 | options->system_hostfile = NULL; | |
1065 | options->user_hostfile = NULL; | |
a306f2dd | 1066 | options->system_hostfile2 = NULL; |
1067 | options->user_hostfile2 = NULL; | |
5260325f | 1068 | options->num_local_forwards = 0; |
1069 | options->num_remote_forwards = 0; | |
e1c5bfaf | 1070 | options->clear_forwardings = -1; |
5eaf8578 | 1071 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 1072 | options->preferred_authentications = NULL; |
3435f5a6 | 1073 | options->bind_address = NULL; |
9ff6f66f | 1074 | options->smartcard_device = NULL; |
cc46e2ee | 1075 | options->enable_ssh_keysign = - 1; |
8bbc048a | 1076 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 1077 | options->identities_only = - 1; |
ffd7b36b | 1078 | options->rekey_limit = - 1; |
21289cd0 | 1079 | options->verify_host_key_dns = -1; |
5d8d32a3 | 1080 | options->server_alive_interval = -1; |
1081 | options->server_alive_count_max = -1; | |
61a2c1da | 1082 | options->num_send_env = 0; |
5e96b616 | 1083 | options->control_path = NULL; |
1084 | options->control_master = -1; | |
5c63c2ab | 1085 | options->hash_known_hosts = -1; |
d20f3c9e | 1086 | options->tun_open = -1; |
1087 | options->tun_local = -1; | |
1088 | options->tun_remote = -1; | |
1089 | options->local_command = NULL; | |
1090 | options->permit_local_command = -1; | |
94c0aea4 | 1091 | options->use_roaming = -1; |
fe7dba42 | 1092 | options->rdomain = -1; |
7b3999b8 | 1093 | options->visual_host_key = -1; |
5adf6b9a | 1094 | options->zero_knowledge_password_authentication = -1; |
8efc0c15 | 1095 | } |
1096 | ||
aa3378df | 1097 | /* |
1098 | * Called after processing other sources of option data, this fills those | |
1099 | * options for which no value has been specified with their default values. | |
1100 | */ | |
8efc0c15 | 1101 | |
6ae2364d | 1102 | void |
5260325f | 1103 | fill_default_options(Options * options) |
8efc0c15 | 1104 | { |
d2c46e77 | 1105 | int len; |
1106 | ||
5260325f | 1107 | if (options->forward_agent == -1) |
71276795 | 1108 | options->forward_agent = 0; |
5260325f | 1109 | if (options->forward_x11 == -1) |
c8d54615 | 1110 | options->forward_x11 = 0; |
d73a67d7 | 1111 | if (options->forward_x11_trusted == -1) |
1112 | options->forward_x11_trusted = 0; | |
42ea6f5e | 1113 | if (options->exit_on_forward_failure == -1) |
1114 | options->exit_on_forward_failure = 0; | |
fa649821 | 1115 | if (options->xauth_location == NULL) |
fd9ede94 | 1116 | options->xauth_location = _PATH_XAUTH; |
5260325f | 1117 | if (options->gateway_ports == -1) |
1118 | options->gateway_ports = 0; | |
1119 | if (options->use_privileged_port == -1) | |
d5ebca2b | 1120 | options->use_privileged_port = 0; |
5260325f | 1121 | if (options->rsa_authentication == -1) |
1122 | options->rsa_authentication = 1; | |
fa08c86b | 1123 | if (options->pubkey_authentication == -1) |
1124 | options->pubkey_authentication = 1; | |
5ba55ada | 1125 | if (options->challenge_response_authentication == -1) |
10a2cbef | 1126 | options->challenge_response_authentication = 1; |
7364bd04 | 1127 | if (options->gss_authentication == -1) |
2ecb78df | 1128 | options->gss_authentication = 0; |
7364bd04 | 1129 | if (options->gss_deleg_creds == -1) |
1130 | options->gss_deleg_creds = 0; | |
5260325f | 1131 | if (options->password_authentication == -1) |
1132 | options->password_authentication = 1; | |
94ec8c6b | 1133 | if (options->kbd_interactive_authentication == -1) |
d464095c | 1134 | options->kbd_interactive_authentication = 1; |
5260325f | 1135 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 1136 | options->rhosts_rsa_authentication = 0; |
8002af61 | 1137 | if (options->hostbased_authentication == -1) |
1138 | options->hostbased_authentication = 0; | |
5260325f | 1139 | if (options->batch_mode == -1) |
1140 | options->batch_mode = 0; | |
1141 | if (options->check_host_ip == -1) | |
1142 | options->check_host_ip = 1; | |
1143 | if (options->strict_host_key_checking == -1) | |
1144 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1145 | if (options->compression == -1) | |
1146 | options->compression = 0; | |
fd573618 | 1147 | if (options->tcp_keep_alive == -1) |
1148 | options->tcp_keep_alive = 1; | |
5260325f | 1149 | if (options->compression_level == -1) |
1150 | options->compression_level = 6; | |
1151 | if (options->port == -1) | |
1152 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1153 | if (options->address_family == -1) |
1154 | options->address_family = AF_UNSPEC; | |
5260325f | 1155 | if (options->connection_attempts == -1) |
ce773142 | 1156 | options->connection_attempts = 1; |
5260325f | 1157 | if (options->number_of_password_prompts == -1) |
1158 | options->number_of_password_prompts = 3; | |
1159 | /* Selected in ssh_login(). */ | |
1160 | if (options->cipher == -1) | |
1161 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1162 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1163 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1164 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1165 | if (options->protocol == SSH_PROTO_UNKNOWN) |
21af5fc4 | 1166 | options->protocol = SSH_PROTO_2; |
5260325f | 1167 | if (options->num_identity_files == 0) { |
fa08c86b | 1168 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1169 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1170 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1171 | xmalloc(len); |
1172 | snprintf(options->identity_files[options->num_identity_files++], | |
1173 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1174 | } |
1175 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1176 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1177 | options->identity_files[options->num_identity_files] = | |
1178 | xmalloc(len); | |
1179 | snprintf(options->identity_files[options->num_identity_files++], | |
1180 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1181 | ||
d2c46e77 | 1182 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1183 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1184 | xmalloc(len); |
1185 | snprintf(options->identity_files[options->num_identity_files++], | |
1186 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1187 | } |
a306f2dd | 1188 | } |
5260325f | 1189 | if (options->escape_char == -1) |
1190 | options->escape_char = '~'; | |
1191 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1192 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1193 | if (options->user_hostfile == NULL) |
42f11eb2 | 1194 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1195 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1196 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1197 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1198 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1199 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1200 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1201 | if (options->clear_forwardings == 1) |
1202 | clear_forwardings(options); | |
8bbc048a | 1203 | if (options->no_host_authentication_for_localhost == - 1) |
1204 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1205 | if (options->identities_only == -1) |
1206 | options->identities_only = 0; | |
cc46e2ee | 1207 | if (options->enable_ssh_keysign == -1) |
1208 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1209 | if (options->rekey_limit == -1) |
1210 | options->rekey_limit = 0; | |
21289cd0 | 1211 | if (options->verify_host_key_dns == -1) |
1212 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1213 | if (options->server_alive_interval == -1) |
1214 | options->server_alive_interval = 0; | |
1215 | if (options->server_alive_count_max == -1) | |
1216 | options->server_alive_count_max = 3; | |
5e96b616 | 1217 | if (options->control_master == -1) |
1218 | options->control_master = 0; | |
5c63c2ab | 1219 | if (options->hash_known_hosts == -1) |
1220 | options->hash_known_hosts = 0; | |
d20f3c9e | 1221 | if (options->tun_open == -1) |
a4f24bf8 | 1222 | options->tun_open = SSH_TUNMODE_NO; |
1223 | if (options->tun_local == -1) | |
1224 | options->tun_local = SSH_TUNID_ANY; | |
1225 | if (options->tun_remote == -1) | |
1226 | options->tun_remote = SSH_TUNID_ANY; | |
d20f3c9e | 1227 | if (options->permit_local_command == -1) |
1228 | options->permit_local_command = 0; | |
94c0aea4 | 1229 | if (options->use_roaming == -1) |
1230 | options->use_roaming = 1; | |
7b3999b8 | 1231 | if (options->visual_host_key == -1) |
1232 | options->visual_host_key = 0; | |
5adf6b9a | 1233 | if (options->zero_knowledge_password_authentication == -1) |
1234 | options->zero_knowledge_password_authentication = 0; | |
d20f3c9e | 1235 | /* options->local_command should not be set by default */ |
5260325f | 1236 | /* options->proxy_command should not be set by default */ |
1237 | /* options->user will be set in the main program if appropriate */ | |
1238 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1239 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1240 | /* options->preferred_authentications will be set in ssh */ |
fe7dba42 | 1241 | /* options->rdomain should not be set by default */ |
8efc0c15 | 1242 | } |
3867aa0a | 1243 | |
1244 | /* | |
1245 | * parse_forward | |
1246 | * parses a string containing a port forwarding specification of the form: | |
30573fea | 1247 | * dynamicfwd == 0 |
3867aa0a | 1248 | * [listenhost:]listenport:connecthost:connectport |
30573fea | 1249 | * dynamicfwd == 1 |
1250 | * [listenhost:]listenport | |
3867aa0a | 1251 | * returns number of arguments parsed or zero on error |
1252 | */ | |
1253 | int | |
17525a70 | 1254 | parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd) |
3867aa0a | 1255 | { |
1256 | int i; | |
1257 | char *p, *cp, *fwdarg[4]; | |
1258 | ||
1259 | memset(fwd, '\0', sizeof(*fwd)); | |
1260 | ||
1261 | cp = p = xstrdup(fwdspec); | |
1262 | ||
1263 | /* skip leading spaces */ | |
f48fbab3 | 1264 | while (isspace(*cp)) |
3867aa0a | 1265 | cp++; |
1266 | ||
1267 | for (i = 0; i < 4; ++i) | |
1268 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1269 | break; | |
1270 | ||
c8eaf0ec | 1271 | /* Check for trailing garbage */ |
3867aa0a | 1272 | if (cp != NULL) |
1273 | i = 0; /* failure */ | |
1274 | ||
1275 | switch (i) { | |
30573fea | 1276 | case 1: |
1277 | fwd->listen_host = NULL; | |
1278 | fwd->listen_port = a2port(fwdarg[0]); | |
1279 | fwd->connect_host = xstrdup("socks"); | |
1280 | break; | |
1281 | ||
1282 | case 2: | |
1283 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1284 | fwd->listen_port = a2port(fwdarg[1]); | |
1285 | fwd->connect_host = xstrdup("socks"); | |
1286 | break; | |
1287 | ||
3867aa0a | 1288 | case 3: |
1289 | fwd->listen_host = NULL; | |
1290 | fwd->listen_port = a2port(fwdarg[0]); | |
1291 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1292 | fwd->connect_port = a2port(fwdarg[2]); | |
1293 | break; | |
1294 | ||
1295 | case 4: | |
1296 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1297 | fwd->listen_port = a2port(fwdarg[1]); | |
1298 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1299 | fwd->connect_port = a2port(fwdarg[3]); | |
1300 | break; | |
1301 | default: | |
1302 | i = 0; /* failure */ | |
1303 | } | |
1304 | ||
1305 | xfree(p); | |
1306 | ||
30573fea | 1307 | if (dynamicfwd) { |
1308 | if (!(i == 1 || i == 2)) | |
1309 | goto fail_free; | |
1310 | } else { | |
1311 | if (!(i == 3 || i == 4)) | |
1312 | goto fail_free; | |
5134115d | 1313 | if (fwd->connect_port <= 0) |
30573fea | 1314 | goto fail_free; |
1315 | } | |
1316 | ||
17525a70 | 1317 | if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0)) |
3867aa0a | 1318 | goto fail_free; |
1319 | ||
1320 | if (fwd->connect_host != NULL && | |
1321 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1322 | goto fail_free; | |
17525a70 | 1323 | if (fwd->listen_host != NULL && |
1324 | strlen(fwd->listen_host) >= NI_MAXHOST) | |
1325 | goto fail_free; | |
1326 | ||
3867aa0a | 1327 | |
1328 | return (i); | |
1329 | ||
1330 | fail_free: | |
bab3d903 | 1331 | if (fwd->connect_host != NULL) { |
3867aa0a | 1332 | xfree(fwd->connect_host); |
bab3d903 | 1333 | fwd->connect_host = NULL; |
1334 | } | |
1335 | if (fwd->listen_host != NULL) { | |
3867aa0a | 1336 | xfree(fwd->listen_host); |
bab3d903 | 1337 | fwd->listen_host = NULL; |
1338 | } | |
3867aa0a | 1339 | return (0); |
1340 | } |