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3c0ef626 | 1 | /* |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * Functions for reading the configuration files. | |
6 | * | |
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". | |
12 | */ | |
13 | ||
14 | #include "includes.h" | |
996d5e62 | 15 | RCSID("$OpenBSD: readconf.c,v 1.137 2005/03/04 08:48:06 djm Exp $"); |
3c0ef626 | 16 | |
17 | #include "ssh.h" | |
18 | #include "xmalloc.h" | |
19 | #include "compat.h" | |
20 | #include "cipher.h" | |
21 | #include "pathnames.h" | |
22 | #include "log.h" | |
23 | #include "readconf.h" | |
24 | #include "match.h" | |
25 | #include "misc.h" | |
26 | #include "kex.h" | |
27 | #include "mac.h" | |
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 | |
f5799ae1 | 44 | User foo |
3c0ef626 | 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 | |
3c0ef626 | 60 | PasswordAuthentication no |
61 | ||
62 | Host puukko.hut.fi | |
63 | User t35124p | |
64 | ProxyCommand ssh-proxy %h %p | |
65 | ||
66 | Host *.fr | |
f5799ae1 | 67 | PublicKeyAuthentication no |
3c0ef626 | 68 | |
69 | Host *.su | |
70 | Cipher none | |
71 | PasswordAuthentication no | |
72 | ||
73 | # Defaults for various options | |
74 | Host * | |
75 | ForwardAgent no | |
76 | ForwardX11 no | |
3c0ef626 | 77 | PasswordAuthentication yes |
78 | RSAAuthentication yes | |
79 | RhostsRSAAuthentication yes | |
3c0ef626 | 80 | StrictHostKeyChecking yes |
cdd66111 | 81 | TcpKeepAlive no |
3c0ef626 | 82 | IdentityFile ~/.ssh/identity |
83 | Port 22 | |
84 | EscapeChar ~ | |
85 | ||
86 | */ | |
87 | ||
88 | /* Keyword tokens. */ | |
89 | ||
90 | typedef enum { | |
91 | oBadOption, | |
cdd66111 | 92 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
f5799ae1 | 93 | oPasswordAuthentication, oRSAAuthentication, |
3c0ef626 | 94 | oChallengeResponseAuthentication, oXAuthLocation, |
3c0ef626 | 95 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
96 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
97 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
98 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
cdd66111 | 99 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
3c0ef626 | 100 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
101 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, | |
102 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, | |
103 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, | |
104 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, | |
f5799ae1 | 105 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
0fff78ff | 106 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
107 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, | |
99be0775 | 108 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
996d5e62 | 109 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
0fff78ff | 110 | oDeprecated, oUnsupported |
3c0ef626 | 111 | } OpCodes; |
112 | ||
113 | /* Textual representations of the tokens. */ | |
114 | ||
115 | static struct { | |
116 | const char *name; | |
117 | OpCodes opcode; | |
118 | } keywords[] = { | |
119 | { "forwardagent", oForwardAgent }, | |
120 | { "forwardx11", oForwardX11 }, | |
cdd66111 | 121 | { "forwardx11trusted", oForwardX11Trusted }, |
3c0ef626 | 122 | { "xauthlocation", oXAuthLocation }, |
123 | { "gatewayports", oGatewayPorts }, | |
124 | { "useprivilegedport", oUsePrivilegedPort }, | |
0fff78ff | 125 | { "rhostsauthentication", oDeprecated }, |
3c0ef626 | 126 | { "passwordauthentication", oPasswordAuthentication }, |
127 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, | |
128 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
129 | { "rsaauthentication", oRSAAuthentication }, | |
130 | { "pubkeyauthentication", oPubkeyAuthentication }, | |
131 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ | |
132 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
133 | { "hostbasedauthentication", oHostbasedAuthentication }, | |
134 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, | |
135 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
136 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
0fff78ff | 137 | { "kerberosauthentication", oUnsupported }, |
138 | { "kerberostgtpassing", oUnsupported }, | |
139 | { "afstokenpassing", oUnsupported }, | |
140 | #if defined(GSSAPI) | |
141 | { "gssapiauthentication", oGssAuthentication }, | |
142 | { "gssapidelegatecredentials", oGssDelegateCreds }, | |
143 | #else | |
144 | { "gssapiauthentication", oUnsupported }, | |
145 | { "gssapidelegatecredentials", oUnsupported }, | |
3c0ef626 | 146 | #endif |
f5799ae1 | 147 | { "fallbacktorsh", oDeprecated }, |
148 | { "usersh", oDeprecated }, | |
3c0ef626 | 149 | { "identityfile", oIdentityFile }, |
150 | { "identityfile2", oIdentityFile }, /* alias */ | |
99be0775 | 151 | { "identitiesonly", oIdentitiesOnly }, |
3c0ef626 | 152 | { "hostname", oHostName }, |
153 | { "hostkeyalias", oHostKeyAlias }, | |
154 | { "proxycommand", oProxyCommand }, | |
155 | { "port", oPort }, | |
156 | { "cipher", oCipher }, | |
157 | { "ciphers", oCiphers }, | |
158 | { "macs", oMacs }, | |
159 | { "protocol", oProtocol }, | |
160 | { "remoteforward", oRemoteForward }, | |
161 | { "localforward", oLocalForward }, | |
162 | { "user", oUser }, | |
163 | { "host", oHost }, | |
164 | { "escapechar", oEscapeChar }, | |
165 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
166 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ | |
167 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, | |
168 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ | |
169 | { "connectionattempts", oConnectionAttempts }, | |
170 | { "batchmode", oBatchMode }, | |
171 | { "checkhostip", oCheckHostIP }, | |
172 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
173 | { "compression", oCompression }, | |
174 | { "compressionlevel", oCompressionLevel }, | |
cdd66111 | 175 | { "tcpkeepalive", oTCPKeepAlive }, |
176 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
3c0ef626 | 177 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
178 | { "loglevel", oLogLevel }, | |
179 | { "dynamicforward", oDynamicForward }, | |
180 | { "preferredauthentications", oPreferredAuthentications }, | |
181 | { "hostkeyalgorithms", oHostKeyAlgorithms }, | |
182 | { "bindaddress", oBindAddress }, | |
0fff78ff | 183 | #ifdef SMARTCARD |
3c0ef626 | 184 | { "smartcarddevice", oSmartcardDevice }, |
0fff78ff | 185 | #else |
186 | { "smartcarddevice", oUnsupported }, | |
187 | #endif | |
e9a17296 | 188 | { "clearallforwardings", oClearAllForwardings }, |
6a9b3198 | 189 | { "enablesshkeysign", oEnableSSHKeysign }, |
0fff78ff | 190 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
e9a17296 | 191 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
0fff78ff | 192 | { "rekeylimit", oRekeyLimit }, |
193 | { "connecttimeout", oConnectTimeout }, | |
194 | { "addressfamily", oAddressFamily }, | |
cdd66111 | 195 | { "serveraliveinterval", oServerAliveInterval }, |
196 | { "serveralivecountmax", oServerAliveCountMax }, | |
c9f39d2c | 197 | { "sendenv", oSendEnv }, |
198 | { "controlpath", oControlPath }, | |
199 | { "controlmaster", oControlMaster }, | |
996d5e62 | 200 | { "hashknownhosts", oHashKnownHosts }, |
e9a17296 | 201 | { NULL, oBadOption } |
3c0ef626 | 202 | }; |
203 | ||
204 | /* | |
205 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
206 | * error. | |
207 | */ | |
208 | ||
209 | void | |
996d5e62 | 210 | add_local_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 211 | { |
212 | Forward *fwd; | |
41b2f314 | 213 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
3c0ef626 | 214 | extern uid_t original_real_uid; |
996d5e62 | 215 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
3c0ef626 | 216 | fatal("Privileged ports can only be forwarded by root."); |
217 | #endif | |
218 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
219 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
220 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
996d5e62 | 221 | |
222 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
223 | NULL : xstrdup(newfwd->listen_host); | |
224 | fwd->listen_port = newfwd->listen_port; | |
225 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
226 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 227 | } |
228 | ||
229 | /* | |
230 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
231 | * an error. | |
232 | */ | |
233 | ||
234 | void | |
996d5e62 | 235 | add_remote_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 236 | { |
237 | Forward *fwd; | |
238 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
239 | fatal("Too many remote forwards (max %d).", | |
e9a17296 | 240 | SSH_MAX_FORWARDS_PER_DIRECTION); |
3c0ef626 | 241 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
996d5e62 | 242 | |
243 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
244 | NULL : xstrdup(newfwd->listen_host); | |
245 | fwd->listen_port = newfwd->listen_port; | |
246 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
247 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 248 | } |
249 | ||
250 | static void | |
251 | clear_forwardings(Options *options) | |
252 | { | |
253 | int i; | |
254 | ||
996d5e62 | 255 | for (i = 0; i < options->num_local_forwards; i++) { |
256 | xfree(options->local_forwards[i].listen_host); | |
257 | xfree(options->local_forwards[i].connect_host); | |
258 | } | |
3c0ef626 | 259 | options->num_local_forwards = 0; |
996d5e62 | 260 | for (i = 0; i < options->num_remote_forwards; i++) { |
261 | xfree(options->remote_forwards[i].listen_host); | |
262 | xfree(options->remote_forwards[i].connect_host); | |
263 | } | |
3c0ef626 | 264 | options->num_remote_forwards = 0; |
265 | } | |
266 | ||
267 | /* | |
268 | * Returns the number of the token pointed to by cp or oBadOption. | |
269 | */ | |
270 | ||
271 | static OpCodes | |
272 | parse_token(const char *cp, const char *filename, int linenum) | |
273 | { | |
274 | u_int i; | |
275 | ||
276 | for (i = 0; keywords[i].name; i++) | |
277 | if (strcasecmp(cp, keywords[i].name) == 0) | |
278 | return keywords[i].opcode; | |
279 | ||
280 | error("%s: line %d: Bad configuration option: %s", | |
281 | filename, linenum, cp); | |
282 | return oBadOption; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Processes a single option line as used in the configuration files. This | |
287 | * only sets those values that have not already been set. | |
288 | */ | |
6a9b3198 | 289 | #define WHITESPACE " \t\r\n" |
3c0ef626 | 290 | |
291 | int | |
292 | process_config_line(Options *options, const char *host, | |
293 | char *line, const char *filename, int linenum, | |
294 | int *activep) | |
295 | { | |
996d5e62 | 296 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
3c0ef626 | 297 | int opcode, *intptr, value; |
6a9b3198 | 298 | size_t len; |
996d5e62 | 299 | Forward fwd; |
3c0ef626 | 300 | |
0fff78ff | 301 | /* Strip trailing whitespace */ |
302 | for(len = strlen(line) - 1; len > 0; len--) { | |
303 | if (strchr(WHITESPACE, line[len]) == NULL) | |
304 | break; | |
305 | line[len] = '\0'; | |
306 | } | |
307 | ||
3c0ef626 | 308 | s = line; |
309 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
310 | keyword = strdelim(&s); | |
311 | /* Ignore leading whitespace. */ | |
312 | if (*keyword == '\0') | |
313 | keyword = strdelim(&s); | |
314 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') | |
315 | return 0; | |
316 | ||
317 | opcode = parse_token(keyword, filename, linenum); | |
318 | ||
319 | switch (opcode) { | |
320 | case oBadOption: | |
321 | /* don't panic, but count bad options */ | |
322 | return -1; | |
323 | /* NOTREACHED */ | |
0fff78ff | 324 | case oConnectTimeout: |
325 | intptr = &options->connection_timeout; | |
cdd66111 | 326 | parse_time: |
0fff78ff | 327 | arg = strdelim(&s); |
328 | if (!arg || *arg == '\0') | |
329 | fatal("%s line %d: missing time value.", | |
330 | filename, linenum); | |
331 | if ((value = convtime(arg)) == -1) | |
332 | fatal("%s line %d: invalid time value.", | |
333 | filename, linenum); | |
334 | if (*intptr == -1) | |
335 | *intptr = value; | |
336 | break; | |
337 | ||
3c0ef626 | 338 | case oForwardAgent: |
339 | intptr = &options->forward_agent; | |
340 | parse_flag: | |
341 | arg = strdelim(&s); | |
342 | if (!arg || *arg == '\0') | |
343 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
344 | value = 0; /* To avoid compiler warning... */ | |
345 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
346 | value = 1; | |
347 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
348 | value = 0; | |
349 | else | |
350 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
351 | if (*activep && *intptr == -1) | |
352 | *intptr = value; | |
353 | break; | |
354 | ||
355 | case oForwardX11: | |
356 | intptr = &options->forward_x11; | |
357 | goto parse_flag; | |
358 | ||
cdd66111 | 359 | case oForwardX11Trusted: |
360 | intptr = &options->forward_x11_trusted; | |
361 | goto parse_flag; | |
362 | ||
3c0ef626 | 363 | case oGatewayPorts: |
364 | intptr = &options->gateway_ports; | |
365 | goto parse_flag; | |
366 | ||
367 | case oUsePrivilegedPort: | |
368 | intptr = &options->use_privileged_port; | |
369 | goto parse_flag; | |
370 | ||
3c0ef626 | 371 | case oPasswordAuthentication: |
372 | intptr = &options->password_authentication; | |
373 | goto parse_flag; | |
374 | ||
375 | case oKbdInteractiveAuthentication: | |
376 | intptr = &options->kbd_interactive_authentication; | |
377 | goto parse_flag; | |
378 | ||
379 | case oKbdInteractiveDevices: | |
380 | charptr = &options->kbd_interactive_devices; | |
381 | goto parse_string; | |
382 | ||
383 | case oPubkeyAuthentication: | |
384 | intptr = &options->pubkey_authentication; | |
385 | goto parse_flag; | |
386 | ||
387 | case oRSAAuthentication: | |
388 | intptr = &options->rsa_authentication; | |
389 | goto parse_flag; | |
390 | ||
391 | case oRhostsRSAAuthentication: | |
392 | intptr = &options->rhosts_rsa_authentication; | |
393 | goto parse_flag; | |
394 | ||
395 | case oHostbasedAuthentication: | |
396 | intptr = &options->hostbased_authentication; | |
397 | goto parse_flag; | |
398 | ||
399 | case oChallengeResponseAuthentication: | |
400 | intptr = &options->challenge_response_authentication; | |
401 | goto parse_flag; | |
0fff78ff | 402 | |
403 | case oGssAuthentication: | |
404 | intptr = &options->gss_authentication; | |
3c0ef626 | 405 | goto parse_flag; |
0fff78ff | 406 | |
407 | case oGssDelegateCreds: | |
408 | intptr = &options->gss_deleg_creds; | |
3c0ef626 | 409 | goto parse_flag; |
0fff78ff | 410 | |
3c0ef626 | 411 | case oBatchMode: |
412 | intptr = &options->batch_mode; | |
413 | goto parse_flag; | |
414 | ||
415 | case oCheckHostIP: | |
416 | intptr = &options->check_host_ip; | |
417 | goto parse_flag; | |
418 | ||
0fff78ff | 419 | case oVerifyHostKeyDNS: |
420 | intptr = &options->verify_host_key_dns; | |
cdd66111 | 421 | goto parse_yesnoask; |
0fff78ff | 422 | |
3c0ef626 | 423 | case oStrictHostKeyChecking: |
424 | intptr = &options->strict_host_key_checking; | |
cdd66111 | 425 | parse_yesnoask: |
3c0ef626 | 426 | arg = strdelim(&s); |
427 | if (!arg || *arg == '\0') | |
428 | fatal("%.200s line %d: Missing yes/no/ask argument.", | |
e9a17296 | 429 | filename, linenum); |
3c0ef626 | 430 | value = 0; /* To avoid compiler warning... */ |
431 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
432 | value = 1; | |
433 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
434 | value = 0; | |
435 | else if (strcmp(arg, "ask") == 0) | |
436 | value = 2; | |
437 | else | |
438 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
439 | if (*activep && *intptr == -1) | |
440 | *intptr = value; | |
441 | break; | |
442 | ||
443 | case oCompression: | |
444 | intptr = &options->compression; | |
445 | goto parse_flag; | |
446 | ||
cdd66111 | 447 | case oTCPKeepAlive: |
448 | intptr = &options->tcp_keep_alive; | |
3c0ef626 | 449 | goto parse_flag; |
450 | ||
451 | case oNoHostAuthenticationForLocalhost: | |
452 | intptr = &options->no_host_authentication_for_localhost; | |
453 | goto parse_flag; | |
454 | ||
455 | case oNumberOfPasswordPrompts: | |
456 | intptr = &options->number_of_password_prompts; | |
457 | goto parse_int; | |
458 | ||
459 | case oCompressionLevel: | |
460 | intptr = &options->compression_level; | |
461 | goto parse_int; | |
462 | ||
0fff78ff | 463 | case oRekeyLimit: |
464 | intptr = &options->rekey_limit; | |
465 | arg = strdelim(&s); | |
466 | if (!arg || *arg == '\0') | |
467 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
468 | if (arg[0] < '0' || arg[0] > '9') | |
469 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
470 | value = strtol(arg, &endofnumber, 10); | |
471 | if (arg == endofnumber) | |
472 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
473 | switch (toupper(*endofnumber)) { | |
474 | case 'K': | |
475 | value *= 1<<10; | |
476 | break; | |
477 | case 'M': | |
478 | value *= 1<<20; | |
479 | break; | |
480 | case 'G': | |
481 | value *= 1<<30; | |
482 | break; | |
483 | } | |
484 | if (*activep && *intptr == -1) | |
485 | *intptr = value; | |
486 | break; | |
487 | ||
3c0ef626 | 488 | case oIdentityFile: |
489 | arg = strdelim(&s); | |
490 | if (!arg || *arg == '\0') | |
491 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
492 | if (*activep) { | |
493 | intptr = &options->num_identity_files; | |
494 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
495 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
e9a17296 | 496 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
3c0ef626 | 497 | charptr = &options->identity_files[*intptr]; |
498 | *charptr = xstrdup(arg); | |
499 | *intptr = *intptr + 1; | |
500 | } | |
501 | break; | |
502 | ||
503 | case oXAuthLocation: | |
504 | charptr=&options->xauth_location; | |
505 | goto parse_string; | |
506 | ||
507 | case oUser: | |
508 | charptr = &options->user; | |
509 | parse_string: | |
510 | arg = strdelim(&s); | |
511 | if (!arg || *arg == '\0') | |
512 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
513 | if (*activep && *charptr == NULL) | |
514 | *charptr = xstrdup(arg); | |
515 | break; | |
516 | ||
517 | case oGlobalKnownHostsFile: | |
518 | charptr = &options->system_hostfile; | |
519 | goto parse_string; | |
520 | ||
521 | case oUserKnownHostsFile: | |
522 | charptr = &options->user_hostfile; | |
523 | goto parse_string; | |
524 | ||
525 | case oGlobalKnownHostsFile2: | |
526 | charptr = &options->system_hostfile2; | |
527 | goto parse_string; | |
528 | ||
529 | case oUserKnownHostsFile2: | |
530 | charptr = &options->user_hostfile2; | |
531 | goto parse_string; | |
532 | ||
533 | case oHostName: | |
534 | charptr = &options->hostname; | |
535 | goto parse_string; | |
536 | ||
537 | case oHostKeyAlias: | |
538 | charptr = &options->host_key_alias; | |
539 | goto parse_string; | |
540 | ||
541 | case oPreferredAuthentications: | |
542 | charptr = &options->preferred_authentications; | |
543 | goto parse_string; | |
544 | ||
545 | case oBindAddress: | |
546 | charptr = &options->bind_address; | |
547 | goto parse_string; | |
548 | ||
549 | case oSmartcardDevice: | |
550 | charptr = &options->smartcard_device; | |
551 | goto parse_string; | |
552 | ||
553 | case oProxyCommand: | |
0fff78ff | 554 | if (s == NULL) |
555 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
3c0ef626 | 556 | charptr = &options->proxy_command; |
6a9b3198 | 557 | len = strspn(s, WHITESPACE "="); |
3c0ef626 | 558 | if (*activep && *charptr == NULL) |
6a9b3198 | 559 | *charptr = xstrdup(s + len); |
3c0ef626 | 560 | return 0; |
561 | ||
562 | case oPort: | |
563 | intptr = &options->port; | |
564 | parse_int: | |
565 | arg = strdelim(&s); | |
566 | if (!arg || *arg == '\0') | |
567 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
568 | if (arg[0] < '0' || arg[0] > '9') | |
569 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
570 | ||
571 | /* Octal, decimal, or hex format? */ | |
572 | value = strtol(arg, &endofnumber, 0); | |
573 | if (arg == endofnumber) | |
574 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
575 | if (*activep && *intptr == -1) | |
576 | *intptr = value; | |
577 | break; | |
578 | ||
579 | case oConnectionAttempts: | |
580 | intptr = &options->connection_attempts; | |
581 | goto parse_int; | |
582 | ||
583 | case oCipher: | |
584 | intptr = &options->cipher; | |
585 | arg = strdelim(&s); | |
586 | if (!arg || *arg == '\0') | |
587 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
588 | value = cipher_number(arg); | |
589 | if (value == -1) | |
590 | fatal("%.200s line %d: Bad cipher '%s'.", | |
e9a17296 | 591 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 592 | if (*activep && *intptr == -1) |
593 | *intptr = value; | |
594 | break; | |
595 | ||
596 | case oCiphers: | |
597 | arg = strdelim(&s); | |
598 | if (!arg || *arg == '\0') | |
599 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
600 | if (!ciphers_valid(arg)) | |
601 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", | |
e9a17296 | 602 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 603 | if (*activep && options->ciphers == NULL) |
604 | options->ciphers = xstrdup(arg); | |
605 | break; | |
606 | ||
607 | case oMacs: | |
608 | arg = strdelim(&s); | |
609 | if (!arg || *arg == '\0') | |
610 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
611 | if (!mac_valid(arg)) | |
612 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
e9a17296 | 613 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 614 | if (*activep && options->macs == NULL) |
615 | options->macs = xstrdup(arg); | |
616 | break; | |
617 | ||
618 | case oHostKeyAlgorithms: | |
619 | arg = strdelim(&s); | |
620 | if (!arg || *arg == '\0') | |
621 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
622 | if (!key_names_valid2(arg)) | |
623 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
e9a17296 | 624 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 625 | if (*activep && options->hostkeyalgorithms == NULL) |
626 | options->hostkeyalgorithms = xstrdup(arg); | |
627 | break; | |
628 | ||
629 | case oProtocol: | |
630 | intptr = &options->protocol; | |
631 | arg = strdelim(&s); | |
632 | if (!arg || *arg == '\0') | |
633 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
634 | value = proto_spec(arg); | |
635 | if (value == SSH_PROTO_UNKNOWN) | |
636 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
e9a17296 | 637 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 638 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
639 | *intptr = value; | |
640 | break; | |
641 | ||
642 | case oLogLevel: | |
643 | intptr = (int *) &options->log_level; | |
644 | arg = strdelim(&s); | |
645 | value = log_level_number(arg); | |
e9a17296 | 646 | if (value == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 647 | fatal("%.200s line %d: unsupported log level '%s'", |
e9a17296 | 648 | filename, linenum, arg ? arg : "<NONE>"); |
649 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) | |
3c0ef626 | 650 | *intptr = (LogLevel) value; |
651 | break; | |
652 | ||
653 | case oLocalForward: | |
654 | case oRemoteForward: | |
655 | arg = strdelim(&s); | |
996d5e62 | 656 | if (arg == NULL || *arg == '\0') |
3c0ef626 | 657 | fatal("%.200s line %d: Missing port argument.", |
658 | filename, linenum); | |
996d5e62 | 659 | arg2 = strdelim(&s); |
660 | if (arg2 == NULL || *arg2 == '\0') | |
661 | fatal("%.200s line %d: Missing target argument.", | |
3c0ef626 | 662 | filename, linenum); |
996d5e62 | 663 | |
664 | /* construct a string for parse_forward */ | |
665 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
666 | ||
667 | if (parse_forward(&fwd, fwdarg) == 0) | |
3c0ef626 | 668 | fatal("%.200s line %d: Bad forwarding specification.", |
669 | filename, linenum); | |
996d5e62 | 670 | |
3c0ef626 | 671 | if (*activep) { |
672 | if (opcode == oLocalForward) | |
996d5e62 | 673 | add_local_forward(options, &fwd); |
3c0ef626 | 674 | else if (opcode == oRemoteForward) |
996d5e62 | 675 | add_remote_forward(options, &fwd); |
3c0ef626 | 676 | } |
677 | break; | |
678 | ||
679 | case oDynamicForward: | |
680 | arg = strdelim(&s); | |
681 | if (!arg || *arg == '\0') | |
682 | fatal("%.200s line %d: Missing port argument.", | |
683 | filename, linenum); | |
996d5e62 | 684 | memset(&fwd, '\0', sizeof(fwd)); |
685 | fwd.connect_host = "socks"; | |
686 | fwd.listen_host = hpdelim(&arg); | |
687 | if (fwd.listen_host == NULL || | |
688 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
689 | fatal("%.200s line %d: Bad forwarding specification.", | |
690 | filename, linenum); | |
691 | if (arg) { | |
692 | fwd.listen_port = a2port(arg); | |
693 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
694 | } else { | |
695 | fwd.listen_port = a2port(fwd.listen_host); | |
696 | fwd.listen_host = ""; | |
697 | } | |
698 | if (fwd.listen_port == 0) | |
3c0ef626 | 699 | fatal("%.200s line %d: Badly formatted port number.", |
700 | filename, linenum); | |
701 | if (*activep) | |
996d5e62 | 702 | add_local_forward(options, &fwd); |
3c0ef626 | 703 | break; |
704 | ||
705 | case oClearAllForwardings: | |
706 | intptr = &options->clear_forwardings; | |
707 | goto parse_flag; | |
708 | ||
709 | case oHost: | |
710 | *activep = 0; | |
711 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') | |
712 | if (match_pattern(host, arg)) { | |
713 | debug("Applying options for %.100s", arg); | |
714 | *activep = 1; | |
715 | break; | |
716 | } | |
717 | /* Avoid garbage check below, as strdelim is done. */ | |
718 | return 0; | |
719 | ||
720 | case oEscapeChar: | |
721 | intptr = &options->escape_char; | |
722 | arg = strdelim(&s); | |
723 | if (!arg || *arg == '\0') | |
724 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
725 | if (arg[0] == '^' && arg[2] == 0 && | |
726 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) | |
727 | value = (u_char) arg[1] & 31; | |
728 | else if (strlen(arg) == 1) | |
729 | value = (u_char) arg[0]; | |
730 | else if (strcmp(arg, "none") == 0) | |
731 | value = SSH_ESCAPECHAR_NONE; | |
732 | else { | |
733 | fatal("%.200s line %d: Bad escape character.", | |
e9a17296 | 734 | filename, linenum); |
3c0ef626 | 735 | /* NOTREACHED */ |
736 | value = 0; /* Avoid compiler warning. */ | |
737 | } | |
738 | if (*activep && *intptr == -1) | |
739 | *intptr = value; | |
740 | break; | |
741 | ||
0fff78ff | 742 | case oAddressFamily: |
743 | arg = strdelim(&s); | |
744 | intptr = &options->address_family; | |
745 | if (strcasecmp(arg, "inet") == 0) | |
746 | value = AF_INET; | |
747 | else if (strcasecmp(arg, "inet6") == 0) | |
748 | value = AF_INET6; | |
749 | else if (strcasecmp(arg, "any") == 0) | |
750 | value = AF_UNSPEC; | |
751 | else | |
752 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
753 | if (*activep && *intptr == -1) | |
754 | *intptr = value; | |
755 | break; | |
756 | ||
6a9b3198 | 757 | case oEnableSSHKeysign: |
758 | intptr = &options->enable_ssh_keysign; | |
759 | goto parse_flag; | |
760 | ||
99be0775 | 761 | case oIdentitiesOnly: |
762 | intptr = &options->identities_only; | |
763 | goto parse_flag; | |
764 | ||
cdd66111 | 765 | case oServerAliveInterval: |
766 | intptr = &options->server_alive_interval; | |
767 | goto parse_time; | |
768 | ||
769 | case oServerAliveCountMax: | |
770 | intptr = &options->server_alive_count_max; | |
771 | goto parse_int; | |
772 | ||
c9f39d2c | 773 | case oSendEnv: |
774 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
775 | if (strchr(arg, '=') != NULL) | |
776 | fatal("%s line %d: Invalid environment name.", | |
777 | filename, linenum); | |
996d5e62 | 778 | if (!*activep) |
779 | continue; | |
c9f39d2c | 780 | if (options->num_send_env >= MAX_SEND_ENV) |
781 | fatal("%s line %d: too many send env.", | |
782 | filename, linenum); | |
783 | options->send_env[options->num_send_env++] = | |
784 | xstrdup(arg); | |
785 | } | |
786 | break; | |
787 | ||
788 | case oControlPath: | |
789 | charptr = &options->control_path; | |
790 | goto parse_string; | |
791 | ||
792 | case oControlMaster: | |
793 | intptr = &options->control_master; | |
794 | goto parse_yesnoask; | |
795 | ||
996d5e62 | 796 | case oHashKnownHosts: |
797 | intptr = &options->hash_known_hosts; | |
798 | goto parse_flag; | |
799 | ||
f5799ae1 | 800 | case oDeprecated: |
801 | debug("%s line %d: Deprecated option \"%s\"", | |
802 | filename, linenum, keyword); | |
803 | return 0; | |
804 | ||
0fff78ff | 805 | case oUnsupported: |
806 | error("%s line %d: Unsupported option \"%s\"", | |
807 | filename, linenum, keyword); | |
808 | return 0; | |
809 | ||
3c0ef626 | 810 | default: |
811 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
812 | } | |
813 | ||
814 | /* Check that there is no garbage at end of line. */ | |
815 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
816 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
e9a17296 | 817 | filename, linenum, arg); |
3c0ef626 | 818 | } |
819 | return 0; | |
820 | } | |
821 | ||
822 | ||
823 | /* | |
824 | * Reads the config file and modifies the options accordingly. Options | |
825 | * should already be initialized before this call. This never returns if | |
826 | * there is an error. If the file does not exist, this returns 0. | |
827 | */ | |
828 | ||
829 | int | |
c9f39d2c | 830 | read_config_file(const char *filename, const char *host, Options *options, |
831 | int checkperm) | |
3c0ef626 | 832 | { |
833 | FILE *f; | |
834 | char line[1024]; | |
835 | int active, linenum; | |
836 | int bad_options = 0; | |
837 | ||
838 | /* Open the file. */ | |
c9f39d2c | 839 | if ((f = fopen(filename, "r")) == NULL) |
3c0ef626 | 840 | return 0; |
841 | ||
c9f39d2c | 842 | if (checkperm) { |
843 | struct stat sb; | |
844 | ||
845 | if (fstat(fileno(f), &sb) == -1) | |
846 | fatal("fstat %s: %s", filename, strerror(errno)); | |
847 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || | |
848 | (sb.st_mode & 022) != 0)) | |
849 | fatal("Bad owner or permissions on %s", filename); | |
850 | } | |
851 | ||
3c0ef626 | 852 | debug("Reading configuration data %.200s", filename); |
853 | ||
854 | /* | |
855 | * Mark that we are now processing the options. This flag is turned | |
856 | * on/off by Host specifications. | |
857 | */ | |
858 | active = 1; | |
859 | linenum = 0; | |
860 | while (fgets(line, sizeof(line), f)) { | |
861 | /* Update line number counter. */ | |
862 | linenum++; | |
863 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
864 | bad_options++; | |
865 | } | |
866 | fclose(f); | |
867 | if (bad_options > 0) | |
868 | fatal("%s: terminating, %d bad configuration options", | |
e9a17296 | 869 | filename, bad_options); |
3c0ef626 | 870 | return 1; |
871 | } | |
872 | ||
873 | /* | |
874 | * Initializes options to special values that indicate that they have not yet | |
875 | * been set. Read_config_file will only set options with this value. Options | |
876 | * are processed in the following order: command line, user config file, | |
877 | * system config file. Last, fill_default_options is called. | |
878 | */ | |
879 | ||
880 | void | |
881 | initialize_options(Options * options) | |
882 | { | |
883 | memset(options, 'X', sizeof(*options)); | |
884 | options->forward_agent = -1; | |
885 | options->forward_x11 = -1; | |
cdd66111 | 886 | options->forward_x11_trusted = -1; |
3c0ef626 | 887 | options->xauth_location = NULL; |
888 | options->gateway_ports = -1; | |
889 | options->use_privileged_port = -1; | |
3c0ef626 | 890 | options->rsa_authentication = -1; |
891 | options->pubkey_authentication = -1; | |
892 | options->challenge_response_authentication = -1; | |
0fff78ff | 893 | options->gss_authentication = -1; |
894 | options->gss_deleg_creds = -1; | |
3c0ef626 | 895 | options->password_authentication = -1; |
896 | options->kbd_interactive_authentication = -1; | |
897 | options->kbd_interactive_devices = NULL; | |
898 | options->rhosts_rsa_authentication = -1; | |
899 | options->hostbased_authentication = -1; | |
3c0ef626 | 900 | options->batch_mode = -1; |
901 | options->check_host_ip = -1; | |
902 | options->strict_host_key_checking = -1; | |
903 | options->compression = -1; | |
cdd66111 | 904 | options->tcp_keep_alive = -1; |
3c0ef626 | 905 | options->compression_level = -1; |
906 | options->port = -1; | |
0fff78ff | 907 | options->address_family = -1; |
3c0ef626 | 908 | options->connection_attempts = -1; |
0fff78ff | 909 | options->connection_timeout = -1; |
3c0ef626 | 910 | options->number_of_password_prompts = -1; |
911 | options->cipher = -1; | |
912 | options->ciphers = NULL; | |
913 | options->macs = NULL; | |
914 | options->hostkeyalgorithms = NULL; | |
915 | options->protocol = SSH_PROTO_UNKNOWN; | |
916 | options->num_identity_files = 0; | |
917 | options->hostname = NULL; | |
918 | options->host_key_alias = NULL; | |
919 | options->proxy_command = NULL; | |
920 | options->user = NULL; | |
921 | options->escape_char = -1; | |
922 | options->system_hostfile = NULL; | |
923 | options->user_hostfile = NULL; | |
924 | options->system_hostfile2 = NULL; | |
925 | options->user_hostfile2 = NULL; | |
926 | options->num_local_forwards = 0; | |
927 | options->num_remote_forwards = 0; | |
928 | options->clear_forwardings = -1; | |
e9a17296 | 929 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
3c0ef626 | 930 | options->preferred_authentications = NULL; |
931 | options->bind_address = NULL; | |
932 | options->smartcard_device = NULL; | |
6a9b3198 | 933 | options->enable_ssh_keysign = - 1; |
3c0ef626 | 934 | options->no_host_authentication_for_localhost = - 1; |
99be0775 | 935 | options->identities_only = - 1; |
0fff78ff | 936 | options->rekey_limit = - 1; |
937 | options->verify_host_key_dns = -1; | |
cdd66111 | 938 | options->server_alive_interval = -1; |
939 | options->server_alive_count_max = -1; | |
c9f39d2c | 940 | options->num_send_env = 0; |
941 | options->control_path = NULL; | |
942 | options->control_master = -1; | |
996d5e62 | 943 | options->hash_known_hosts = -1; |
3c0ef626 | 944 | } |
945 | ||
946 | /* | |
947 | * Called after processing other sources of option data, this fills those | |
948 | * options for which no value has been specified with their default values. | |
949 | */ | |
950 | ||
951 | void | |
952 | fill_default_options(Options * options) | |
953 | { | |
954 | int len; | |
955 | ||
956 | if (options->forward_agent == -1) | |
957 | options->forward_agent = 0; | |
958 | if (options->forward_x11 == -1) | |
959 | options->forward_x11 = 0; | |
cdd66111 | 960 | if (options->forward_x11_trusted == -1) |
961 | options->forward_x11_trusted = 0; | |
3c0ef626 | 962 | if (options->xauth_location == NULL) |
963 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 964 | if (options->gateway_ports == -1) |
965 | options->gateway_ports = 0; | |
966 | if (options->use_privileged_port == -1) | |
967 | options->use_privileged_port = 0; | |
3c0ef626 | 968 | if (options->rsa_authentication == -1) |
969 | options->rsa_authentication = 1; | |
970 | if (options->pubkey_authentication == -1) | |
971 | options->pubkey_authentication = 1; | |
972 | if (options->challenge_response_authentication == -1) | |
973 | options->challenge_response_authentication = 1; | |
0fff78ff | 974 | if (options->gss_authentication == -1) |
cdd66111 | 975 | options->gss_authentication = 0; |
0fff78ff | 976 | if (options->gss_deleg_creds == -1) |
977 | options->gss_deleg_creds = 0; | |
3c0ef626 | 978 | if (options->password_authentication == -1) |
979 | options->password_authentication = 1; | |
980 | if (options->kbd_interactive_authentication == -1) | |
981 | options->kbd_interactive_authentication = 1; | |
982 | if (options->rhosts_rsa_authentication == -1) | |
f5799ae1 | 983 | options->rhosts_rsa_authentication = 0; |
3c0ef626 | 984 | if (options->hostbased_authentication == -1) |
985 | options->hostbased_authentication = 0; | |
3c0ef626 | 986 | if (options->batch_mode == -1) |
987 | options->batch_mode = 0; | |
988 | if (options->check_host_ip == -1) | |
989 | options->check_host_ip = 1; | |
990 | if (options->strict_host_key_checking == -1) | |
991 | options->strict_host_key_checking = 2; /* 2 is default */ | |
992 | if (options->compression == -1) | |
993 | options->compression = 0; | |
cdd66111 | 994 | if (options->tcp_keep_alive == -1) |
995 | options->tcp_keep_alive = 1; | |
3c0ef626 | 996 | if (options->compression_level == -1) |
997 | options->compression_level = 6; | |
998 | if (options->port == -1) | |
999 | options->port = 0; /* Filled in ssh_connect. */ | |
0fff78ff | 1000 | if (options->address_family == -1) |
1001 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 1002 | if (options->connection_attempts == -1) |
1003 | options->connection_attempts = 1; | |
1004 | if (options->number_of_password_prompts == -1) | |
1005 | options->number_of_password_prompts = 3; | |
1006 | /* Selected in ssh_login(). */ | |
1007 | if (options->cipher == -1) | |
1008 | options->cipher = SSH_CIPHER_NOT_SET; | |
1009 | /* options->ciphers, default set in myproposals.h */ | |
1010 | /* options->macs, default set in myproposals.h */ | |
1011 | /* options->hostkeyalgorithms, default set in myproposals.h */ | |
1012 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
1013 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
1014 | if (options->num_identity_files == 0) { | |
1015 | if (options->protocol & SSH_PROTO_1) { | |
1016 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; | |
1017 | options->identity_files[options->num_identity_files] = | |
1018 | xmalloc(len); | |
1019 | snprintf(options->identity_files[options->num_identity_files++], | |
1020 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
1021 | } | |
1022 | if (options->protocol & SSH_PROTO_2) { | |
1023 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; | |
1024 | options->identity_files[options->num_identity_files] = | |
1025 | xmalloc(len); | |
1026 | snprintf(options->identity_files[options->num_identity_files++], | |
1027 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1028 | ||
1029 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; | |
1030 | options->identity_files[options->num_identity_files] = | |
1031 | xmalloc(len); | |
1032 | snprintf(options->identity_files[options->num_identity_files++], | |
1033 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
1034 | } | |
1035 | } | |
1036 | if (options->escape_char == -1) | |
1037 | options->escape_char = '~'; | |
1038 | if (options->system_hostfile == NULL) | |
1039 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; | |
1040 | if (options->user_hostfile == NULL) | |
1041 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; | |
1042 | if (options->system_hostfile2 == NULL) | |
1043 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; | |
1044 | if (options->user_hostfile2 == NULL) | |
1045 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; | |
e9a17296 | 1046 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 1047 | options->log_level = SYSLOG_LEVEL_INFO; |
1048 | if (options->clear_forwardings == 1) | |
1049 | clear_forwardings(options); | |
1050 | if (options->no_host_authentication_for_localhost == - 1) | |
1051 | options->no_host_authentication_for_localhost = 0; | |
99be0775 | 1052 | if (options->identities_only == -1) |
1053 | options->identities_only = 0; | |
6a9b3198 | 1054 | if (options->enable_ssh_keysign == -1) |
1055 | options->enable_ssh_keysign = 0; | |
0fff78ff | 1056 | if (options->rekey_limit == -1) |
1057 | options->rekey_limit = 0; | |
1058 | if (options->verify_host_key_dns == -1) | |
1059 | options->verify_host_key_dns = 0; | |
cdd66111 | 1060 | if (options->server_alive_interval == -1) |
1061 | options->server_alive_interval = 0; | |
1062 | if (options->server_alive_count_max == -1) | |
1063 | options->server_alive_count_max = 3; | |
c9f39d2c | 1064 | if (options->control_master == -1) |
1065 | options->control_master = 0; | |
996d5e62 | 1066 | if (options->hash_known_hosts == -1) |
1067 | options->hash_known_hosts = 0; | |
3c0ef626 | 1068 | /* options->proxy_command should not be set by default */ |
1069 | /* options->user will be set in the main program if appropriate */ | |
1070 | /* options->hostname will be set in the main program if appropriate */ | |
1071 | /* options->host_key_alias should not be set by default */ | |
1072 | /* options->preferred_authentications will be set in ssh */ | |
1073 | } | |
996d5e62 | 1074 | |
1075 | /* | |
1076 | * parse_forward | |
1077 | * parses a string containing a port forwarding specification of the form: | |
1078 | * [listenhost:]listenport:connecthost:connectport | |
1079 | * returns number of arguments parsed or zero on error | |
1080 | */ | |
1081 | int | |
1082 | parse_forward(Forward *fwd, const char *fwdspec) | |
1083 | { | |
1084 | int i; | |
1085 | char *p, *cp, *fwdarg[4]; | |
1086 | ||
1087 | memset(fwd, '\0', sizeof(*fwd)); | |
1088 | ||
1089 | cp = p = xstrdup(fwdspec); | |
1090 | ||
1091 | /* skip leading spaces */ | |
1092 | while (*cp && isspace(*cp)) | |
1093 | cp++; | |
1094 | ||
1095 | for (i = 0; i < 4; ++i) | |
1096 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1097 | break; | |
1098 | ||
1099 | /* Check for trailing garbage in 4-arg case*/ | |
1100 | if (cp != NULL) | |
1101 | i = 0; /* failure */ | |
1102 | ||
1103 | switch (i) { | |
1104 | case 3: | |
1105 | fwd->listen_host = NULL; | |
1106 | fwd->listen_port = a2port(fwdarg[0]); | |
1107 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1108 | fwd->connect_port = a2port(fwdarg[2]); | |
1109 | break; | |
1110 | ||
1111 | case 4: | |
1112 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1113 | fwd->listen_port = a2port(fwdarg[1]); | |
1114 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1115 | fwd->connect_port = a2port(fwdarg[3]); | |
1116 | break; | |
1117 | default: | |
1118 | i = 0; /* failure */ | |
1119 | } | |
1120 | ||
1121 | xfree(p); | |
1122 | ||
1123 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1124 | goto fail_free; | |
1125 | ||
1126 | if (fwd->connect_host != NULL && | |
1127 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1128 | goto fail_free; | |
1129 | ||
1130 | return (i); | |
1131 | ||
1132 | fail_free: | |
1133 | if (fwd->connect_host != NULL) | |
1134 | xfree(fwd->connect_host); | |
1135 | if (fwd->listen_host != NULL) | |
1136 | xfree(fwd->listen_host); | |
1137 | return (0); | |
1138 | } |