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Commit | Line | Data |
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8efc0c15 | 1 | /* |
6ae2364d | 2 | * |
5260325f | 3 | * readconf.c |
6ae2364d | 4 | * |
5260325f | 5 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
6ae2364d | 6 | * |
5260325f | 7 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
8 | * All rights reserved | |
6ae2364d | 9 | * |
5260325f | 10 | * Created: Sat Apr 22 00:03:10 1995 ylo |
6ae2364d | 11 | * |
5260325f | 12 | * Functions for reading the configuration files. |
6ae2364d | 13 | * |
5260325f | 14 | */ |
8efc0c15 | 15 | |
16 | #include "includes.h" | |
704b1659 | 17 | RCSID("$OpenBSD: readconf.c,v 1.43 2000/07/14 22:59:46 markus Exp $"); |
8efc0c15 | 18 | |
19 | #include "ssh.h" | |
20 | #include "cipher.h" | |
21 | #include "readconf.h" | |
7368a6c8 | 22 | #include "match.h" |
8efc0c15 | 23 | #include "xmalloc.h" |
a8be9f80 | 24 | #include "compat.h" |
8efc0c15 | 25 | |
26 | /* Format of the configuration file: | |
27 | ||
28 | # Configuration data is parsed as follows: | |
29 | # 1. command line options | |
30 | # 2. user-specific file | |
31 | # 3. system-wide file | |
32 | # Any configuration value is only changed the first time it is set. | |
33 | # Thus, host-specific definitions should be at the beginning of the | |
34 | # configuration file, and defaults at the end. | |
35 | ||
36 | # Host-specific declarations. These may override anything above. A single | |
37 | # host may match multiple declarations; these are processed in the order | |
38 | # that they are given in. | |
39 | ||
40 | Host *.ngs.fi ngs.fi | |
41 | FallBackToRsh no | |
42 | ||
43 | Host fake.com | |
44 | HostName another.host.name.real.org | |
45 | User blaah | |
46 | Port 34289 | |
47 | ForwardX11 no | |
48 | ForwardAgent no | |
49 | ||
50 | Host books.com | |
51 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
52 | Cipher 3des | |
53 | ||
54 | Host fascist.blob.com | |
55 | Port 23123 | |
56 | User tylonen | |
57 | RhostsAuthentication no | |
58 | PasswordAuthentication no | |
59 | ||
60 | Host puukko.hut.fi | |
61 | User t35124p | |
62 | ProxyCommand ssh-proxy %h %p | |
63 | ||
64 | Host *.fr | |
65 | UseRsh yes | |
66 | ||
67 | Host *.su | |
68 | Cipher none | |
69 | PasswordAuthentication no | |
70 | ||
71 | # Defaults for various options | |
72 | Host * | |
73 | ForwardAgent no | |
74 | ForwardX11 yes | |
75 | RhostsAuthentication yes | |
76 | PasswordAuthentication yes | |
77 | RSAAuthentication yes | |
78 | RhostsRSAAuthentication yes | |
79 | FallBackToRsh no | |
80 | UseRsh no | |
81 | StrictHostKeyChecking yes | |
82 | KeepAlives no | |
83 | IdentityFile ~/.ssh/identity | |
84 | Port 22 | |
85 | EscapeChar ~ | |
86 | ||
87 | */ | |
88 | ||
89 | /* Keyword tokens. */ | |
90 | ||
5260325f | 91 | typedef enum { |
92 | oBadOption, | |
93 | oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, | |
94 | oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, | |
fa649821 | 95 | oSkeyAuthentication, oXAuthLocation, |
8efc0c15 | 96 | #ifdef KRB4 |
5260325f | 97 | oKerberosAuthentication, |
8efc0c15 | 98 | #endif /* KRB4 */ |
99 | #ifdef AFS | |
5260325f | 100 | oKerberosTgtPassing, oAFSTokenPassing, |
8efc0c15 | 101 | #endif |
5260325f | 102 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
103 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
104 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
105 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
106 | oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, | |
a306f2dd | 107 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oIdentityFile2, |
1d1ffb87 | 108 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oDSAAuthentication |
8efc0c15 | 109 | } OpCodes; |
110 | ||
111 | /* Textual representations of the tokens. */ | |
112 | ||
5260325f | 113 | static struct { |
114 | const char *name; | |
115 | OpCodes opcode; | |
116 | } keywords[] = { | |
117 | { "forwardagent", oForwardAgent }, | |
118 | { "forwardx11", oForwardX11 }, | |
fa649821 | 119 | { "xauthlocation", oXAuthLocation }, |
5260325f | 120 | { "gatewayports", oGatewayPorts }, |
121 | { "useprivilegedport", oUsePrivilegedPort }, | |
122 | { "rhostsauthentication", oRhostsAuthentication }, | |
123 | { "passwordauthentication", oPasswordAuthentication }, | |
124 | { "rsaauthentication", oRSAAuthentication }, | |
1d1ffb87 | 125 | { "dsaauthentication", oDSAAuthentication }, |
5260325f | 126 | { "skeyauthentication", oSkeyAuthentication }, |
8efc0c15 | 127 | #ifdef KRB4 |
5260325f | 128 | { "kerberosauthentication", oKerberosAuthentication }, |
8efc0c15 | 129 | #endif /* KRB4 */ |
130 | #ifdef AFS | |
5260325f | 131 | { "kerberostgtpassing", oKerberosTgtPassing }, |
132 | { "afstokenpassing", oAFSTokenPassing }, | |
8efc0c15 | 133 | #endif |
5260325f | 134 | { "fallbacktorsh", oFallBackToRsh }, |
135 | { "usersh", oUseRsh }, | |
136 | { "identityfile", oIdentityFile }, | |
a306f2dd | 137 | { "identityfile2", oIdentityFile2 }, |
5260325f | 138 | { "hostname", oHostName }, |
139 | { "proxycommand", oProxyCommand }, | |
140 | { "port", oPort }, | |
141 | { "cipher", oCipher }, | |
a8be9f80 | 142 | { "ciphers", oCiphers }, |
143 | { "protocol", oProtocol }, | |
5260325f | 144 | { "remoteforward", oRemoteForward }, |
145 | { "localforward", oLocalForward }, | |
146 | { "user", oUser }, | |
147 | { "host", oHost }, | |
148 | { "escapechar", oEscapeChar }, | |
149 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
150 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
151 | { "userknownhostsfile", oUserKnownHostsFile }, | |
a306f2dd | 152 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
153 | { "userknownhostsfile2", oUserKnownHostsFile2 }, | |
5260325f | 154 | { "connectionattempts", oConnectionAttempts }, |
155 | { "batchmode", oBatchMode }, | |
156 | { "checkhostip", oCheckHostIP }, | |
157 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
158 | { "compression", oCompression }, | |
159 | { "compressionlevel", oCompressionLevel }, | |
160 | { "keepalive", oKeepAlives }, | |
161 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, | |
162 | { "tisauthentication", oTISAuthentication }, | |
163 | { "loglevel", oLogLevel }, | |
164 | { NULL, 0 } | |
6a17f9c2 | 165 | }; |
166 | ||
aa3378df | 167 | /* |
168 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
169 | * error. | |
170 | */ | |
8efc0c15 | 171 | |
6ae2364d | 172 | void |
57112b5a | 173 | add_local_forward(Options *options, u_short port, const char *host, |
174 | u_short host_port) | |
8efc0c15 | 175 | { |
5260325f | 176 | Forward *fwd; |
177 | extern uid_t original_real_uid; | |
5260325f | 178 | if (port < IPPORT_RESERVED && original_real_uid != 0) |
179 | fatal("Privileged ports can only be forwarded by root.\n"); | |
180 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
181 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
182 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
183 | fwd->port = port; | |
184 | fwd->host = xstrdup(host); | |
185 | fwd->host_port = host_port; | |
8efc0c15 | 186 | } |
187 | ||
aa3378df | 188 | /* |
189 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
190 | * an error. | |
191 | */ | |
8efc0c15 | 192 | |
6ae2364d | 193 | void |
57112b5a | 194 | add_remote_forward(Options *options, u_short port, const char *host, |
195 | u_short host_port) | |
8efc0c15 | 196 | { |
5260325f | 197 | Forward *fwd; |
198 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
199 | fatal("Too many remote forwards (max %d).", | |
200 | SSH_MAX_FORWARDS_PER_DIRECTION); | |
201 | fwd = &options->remote_forwards[options->num_remote_forwards++]; | |
202 | fwd->port = port; | |
203 | fwd->host = xstrdup(host); | |
204 | fwd->host_port = host_port; | |
8efc0c15 | 205 | } |
206 | ||
aa3378df | 207 | /* |
208 | * Returns the number of the token pointed to by cp of length len. Never | |
209 | * returns if the token is not known. | |
210 | */ | |
8efc0c15 | 211 | |
6ae2364d | 212 | static OpCodes |
5260325f | 213 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 214 | { |
5260325f | 215 | unsigned int i; |
8efc0c15 | 216 | |
5260325f | 217 | for (i = 0; keywords[i].name; i++) |
aa3378df | 218 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 219 | return keywords[i].opcode; |
8efc0c15 | 220 | |
5260325f | 221 | fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", |
222 | filename, linenum, cp); | |
223 | return oBadOption; | |
8efc0c15 | 224 | } |
225 | ||
aa3378df | 226 | /* |
227 | * Processes a single option line as used in the configuration files. This | |
228 | * only sets those values that have not already been set. | |
229 | */ | |
8efc0c15 | 230 | |
e7c0f9d5 | 231 | int |
232 | process_config_line(Options *options, const char *host, | |
5260325f | 233 | char *line, const char *filename, int linenum, |
234 | int *activep) | |
8efc0c15 | 235 | { |
089fbbd2 | 236 | char buf[256], *s, *string, **charptr, *endofnumber, *keyword, *arg; |
57112b5a | 237 | int opcode, *intptr, value; |
238 | u_short fwd_port, fwd_host_port; | |
5260325f | 239 | |
704b1659 | 240 | s = line; |
241 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
242 | keyword = strdelim(&s); | |
243 | /* Ignore leading whitespace. */ | |
244 | if (*keyword == '\0') | |
245 | keyword = strdelim(&s); | |
246 | if (!*keyword || *keyword == '\n' || *keyword == '#') | |
5260325f | 247 | return 0; |
248 | ||
089fbbd2 | 249 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 250 | |
251 | switch (opcode) { | |
252 | case oBadOption: | |
aa3378df | 253 | /* don't panic, but count bad options */ |
254 | return -1; | |
5260325f | 255 | /* NOTREACHED */ |
256 | case oForwardAgent: | |
257 | intptr = &options->forward_agent; | |
258 | parse_flag: | |
704b1659 | 259 | arg = strdelim(&s); |
089fbbd2 | 260 | if (!arg || *arg == '\0') |
5260325f | 261 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
262 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 263 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 264 | value = 1; |
089fbbd2 | 265 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 266 | value = 0; |
267 | else | |
268 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
269 | if (*activep && *intptr == -1) | |
270 | *intptr = value; | |
271 | break; | |
272 | ||
273 | case oForwardX11: | |
274 | intptr = &options->forward_x11; | |
275 | goto parse_flag; | |
276 | ||
277 | case oGatewayPorts: | |
278 | intptr = &options->gateway_ports; | |
279 | goto parse_flag; | |
280 | ||
281 | case oUsePrivilegedPort: | |
282 | intptr = &options->use_privileged_port; | |
283 | goto parse_flag; | |
284 | ||
285 | case oRhostsAuthentication: | |
286 | intptr = &options->rhosts_authentication; | |
287 | goto parse_flag; | |
288 | ||
289 | case oPasswordAuthentication: | |
290 | intptr = &options->password_authentication; | |
291 | goto parse_flag; | |
292 | ||
1d1ffb87 | 293 | case oDSAAuthentication: |
294 | intptr = &options->dsa_authentication; | |
295 | goto parse_flag; | |
296 | ||
5260325f | 297 | case oRSAAuthentication: |
298 | intptr = &options->rsa_authentication; | |
299 | goto parse_flag; | |
300 | ||
301 | case oRhostsRSAAuthentication: | |
302 | intptr = &options->rhosts_rsa_authentication; | |
303 | goto parse_flag; | |
304 | ||
305 | case oTISAuthentication: | |
306 | /* fallthrough, there is no difference on the client side */ | |
307 | case oSkeyAuthentication: | |
308 | intptr = &options->skey_authentication; | |
309 | goto parse_flag; | |
8efc0c15 | 310 | |
311 | #ifdef KRB4 | |
5260325f | 312 | case oKerberosAuthentication: |
313 | intptr = &options->kerberos_authentication; | |
314 | goto parse_flag; | |
8efc0c15 | 315 | #endif /* KRB4 */ |
316 | ||
317 | #ifdef AFS | |
5260325f | 318 | case oKerberosTgtPassing: |
319 | intptr = &options->kerberos_tgt_passing; | |
320 | goto parse_flag; | |
8efc0c15 | 321 | |
5260325f | 322 | case oAFSTokenPassing: |
323 | intptr = &options->afs_token_passing; | |
324 | goto parse_flag; | |
8efc0c15 | 325 | #endif |
5260325f | 326 | |
327 | case oFallBackToRsh: | |
328 | intptr = &options->fallback_to_rsh; | |
329 | goto parse_flag; | |
330 | ||
331 | case oUseRsh: | |
332 | intptr = &options->use_rsh; | |
333 | goto parse_flag; | |
334 | ||
335 | case oBatchMode: | |
336 | intptr = &options->batch_mode; | |
337 | goto parse_flag; | |
338 | ||
339 | case oCheckHostIP: | |
340 | intptr = &options->check_host_ip; | |
341 | goto parse_flag; | |
342 | ||
343 | case oStrictHostKeyChecking: | |
344 | intptr = &options->strict_host_key_checking; | |
704b1659 | 345 | arg = strdelim(&s); |
089fbbd2 | 346 | if (!arg || *arg == '\0') |
5260325f | 347 | fatal("%.200s line %d: Missing yes/no argument.", |
348 | filename, linenum); | |
349 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 350 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 351 | value = 1; |
089fbbd2 | 352 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 353 | value = 0; |
089fbbd2 | 354 | else if (strcmp(arg, "ask") == 0) |
5260325f | 355 | value = 2; |
356 | else | |
357 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
358 | if (*activep && *intptr == -1) | |
359 | *intptr = value; | |
360 | break; | |
361 | ||
362 | case oCompression: | |
363 | intptr = &options->compression; | |
364 | goto parse_flag; | |
365 | ||
366 | case oKeepAlives: | |
367 | intptr = &options->keepalives; | |
368 | goto parse_flag; | |
369 | ||
370 | case oNumberOfPasswordPrompts: | |
371 | intptr = &options->number_of_password_prompts; | |
372 | goto parse_int; | |
373 | ||
374 | case oCompressionLevel: | |
375 | intptr = &options->compression_level; | |
376 | goto parse_int; | |
377 | ||
378 | case oIdentityFile: | |
a306f2dd | 379 | case oIdentityFile2: |
704b1659 | 380 | arg = strdelim(&s); |
089fbbd2 | 381 | if (!arg || *arg == '\0') |
5260325f | 382 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
383 | if (*activep) { | |
a306f2dd | 384 | intptr = (opcode == oIdentityFile) ? |
385 | &options->num_identity_files : | |
386 | &options->num_identity_files2; | |
387 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
5260325f | 388 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
389 | filename, linenum, SSH_MAX_IDENTITY_FILES); | |
a306f2dd | 390 | charptr = (opcode == oIdentityFile) ? |
391 | &options->identity_files[*intptr] : | |
392 | &options->identity_files2[*intptr]; | |
089fbbd2 | 393 | *charptr = xstrdup(arg); |
a306f2dd | 394 | *intptr = *intptr + 1; |
5260325f | 395 | } |
396 | break; | |
397 | ||
fa649821 | 398 | case oXAuthLocation: |
399 | charptr=&options->xauth_location; | |
400 | goto parse_string; | |
401 | ||
5260325f | 402 | case oUser: |
403 | charptr = &options->user; | |
404 | parse_string: | |
704b1659 | 405 | arg = strdelim(&s); |
089fbbd2 | 406 | if (!arg || *arg == '\0') |
5260325f | 407 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
408 | if (*activep && *charptr == NULL) | |
089fbbd2 | 409 | *charptr = xstrdup(arg); |
5260325f | 410 | break; |
411 | ||
412 | case oGlobalKnownHostsFile: | |
413 | charptr = &options->system_hostfile; | |
414 | goto parse_string; | |
415 | ||
416 | case oUserKnownHostsFile: | |
417 | charptr = &options->user_hostfile; | |
418 | goto parse_string; | |
419 | ||
a306f2dd | 420 | case oGlobalKnownHostsFile2: |
421 | charptr = &options->system_hostfile2; | |
422 | goto parse_string; | |
423 | ||
424 | case oUserKnownHostsFile2: | |
425 | charptr = &options->user_hostfile2; | |
426 | goto parse_string; | |
427 | ||
5260325f | 428 | case oHostName: |
429 | charptr = &options->hostname; | |
430 | goto parse_string; | |
431 | ||
432 | case oProxyCommand: | |
433 | charptr = &options->proxy_command; | |
434 | string = xstrdup(""); | |
704b1659 | 435 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 436 | string = xrealloc(string, strlen(string) + strlen(arg) + 2); |
5260325f | 437 | strcat(string, " "); |
089fbbd2 | 438 | strcat(string, arg); |
5260325f | 439 | } |
440 | if (*activep && *charptr == NULL) | |
441 | *charptr = string; | |
442 | else | |
443 | xfree(string); | |
444 | return 0; | |
445 | ||
446 | case oPort: | |
447 | intptr = &options->port; | |
448 | parse_int: | |
704b1659 | 449 | arg = strdelim(&s); |
089fbbd2 | 450 | if (!arg || *arg == '\0') |
5260325f | 451 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 452 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 453 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 454 | |
455 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 456 | value = strtol(arg, &endofnumber, 0); |
457 | if (arg == endofnumber) | |
aa3378df | 458 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 459 | if (*activep && *intptr == -1) |
460 | *intptr = value; | |
461 | break; | |
462 | ||
463 | case oConnectionAttempts: | |
464 | intptr = &options->connection_attempts; | |
465 | goto parse_int; | |
466 | ||
467 | case oCipher: | |
468 | intptr = &options->cipher; | |
704b1659 | 469 | arg = strdelim(&s); |
089fbbd2 | 470 | if (!arg || *arg == '\0') |
71276795 | 471 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 472 | value = cipher_number(arg); |
5260325f | 473 | if (value == -1) |
474 | fatal("%.200s line %d: Bad cipher '%s'.", | |
089fbbd2 | 475 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 476 | if (*activep && *intptr == -1) |
477 | *intptr = value; | |
478 | break; | |
479 | ||
a8be9f80 | 480 | case oCiphers: |
704b1659 | 481 | arg = strdelim(&s); |
089fbbd2 | 482 | if (!arg || *arg == '\0') |
71276795 | 483 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 484 | if (!ciphers_valid(arg)) |
d0c832f3 | 485 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
089fbbd2 | 486 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 487 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 488 | options->ciphers = xstrdup(arg); |
a8be9f80 | 489 | break; |
490 | ||
491 | case oProtocol: | |
492 | intptr = &options->protocol; | |
704b1659 | 493 | arg = strdelim(&s); |
089fbbd2 | 494 | if (!arg || *arg == '\0') |
71276795 | 495 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 496 | value = proto_spec(arg); |
a8be9f80 | 497 | if (value == SSH_PROTO_UNKNOWN) |
498 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
089fbbd2 | 499 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 500 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
501 | *intptr = value; | |
502 | break; | |
503 | ||
5260325f | 504 | case oLogLevel: |
505 | intptr = (int *) &options->log_level; | |
704b1659 | 506 | arg = strdelim(&s); |
089fbbd2 | 507 | value = log_level_number(arg); |
5260325f | 508 | if (value == (LogLevel) - 1) |
509 | fatal("%.200s line %d: unsupported log level '%s'\n", | |
089fbbd2 | 510 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 511 | if (*activep && (LogLevel) * intptr == -1) |
512 | *intptr = (LogLevel) value; | |
513 | break; | |
514 | ||
515 | case oRemoteForward: | |
704b1659 | 516 | arg = strdelim(&s); |
089fbbd2 | 517 | if (!arg || *arg == '\0') |
5260325f | 518 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 519 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 520 | fatal("%.200s line %d: Badly formatted port number.", |
521 | filename, linenum); | |
089fbbd2 | 522 | fwd_port = atoi(arg); |
704b1659 | 523 | arg = strdelim(&s); |
089fbbd2 | 524 | if (!arg || *arg == '\0') |
5260325f | 525 | fatal("%.200s line %d: Missing second argument.", |
526 | filename, linenum); | |
089fbbd2 | 527 | if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
5260325f | 528 | fatal("%.200s line %d: Badly formatted host:port.", |
529 | filename, linenum); | |
530 | if (*activep) | |
531 | add_remote_forward(options, fwd_port, buf, fwd_host_port); | |
532 | break; | |
533 | ||
534 | case oLocalForward: | |
704b1659 | 535 | arg = strdelim(&s); |
089fbbd2 | 536 | if (!arg || *arg == '\0') |
5260325f | 537 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 538 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 539 | fatal("%.200s line %d: Badly formatted port number.", |
540 | filename, linenum); | |
089fbbd2 | 541 | fwd_port = atoi(arg); |
704b1659 | 542 | arg = strdelim(&s); |
089fbbd2 | 543 | if (!arg || *arg == '\0') |
5260325f | 544 | fatal("%.200s line %d: Missing second argument.", |
545 | filename, linenum); | |
089fbbd2 | 546 | if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
5260325f | 547 | fatal("%.200s line %d: Badly formatted host:port.", |
548 | filename, linenum); | |
549 | if (*activep) | |
550 | add_local_forward(options, fwd_port, buf, fwd_host_port); | |
551 | break; | |
552 | ||
553 | case oHost: | |
554 | *activep = 0; | |
704b1659 | 555 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 556 | if (match_pattern(host, arg)) { |
557 | debug("Applying options for %.100s", arg); | |
5260325f | 558 | *activep = 1; |
559 | break; | |
560 | } | |
704b1659 | 561 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 562 | return 0; |
563 | ||
564 | case oEscapeChar: | |
565 | intptr = &options->escape_char; | |
704b1659 | 566 | arg = strdelim(&s); |
089fbbd2 | 567 | if (!arg || *arg == '\0') |
5260325f | 568 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 569 | if (arg[0] == '^' && arg[2] == 0 && |
570 | (unsigned char) arg[1] >= 64 && (unsigned char) arg[1] < 128) | |
571 | value = (unsigned char) arg[1] & 31; | |
572 | else if (strlen(arg) == 1) | |
573 | value = (unsigned char) arg[0]; | |
574 | else if (strcmp(arg, "none") == 0) | |
5260325f | 575 | value = -2; |
576 | else { | |
577 | fatal("%.200s line %d: Bad escape character.", | |
578 | filename, linenum); | |
579 | /* NOTREACHED */ | |
580 | value = 0; /* Avoid compiler warning. */ | |
581 | } | |
582 | if (*activep && *intptr == -1) | |
583 | *intptr = value; | |
584 | break; | |
585 | ||
586 | default: | |
587 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
588 | } | |
589 | ||
590 | /* Check that there is no garbage at end of line. */ | |
704b1659 | 591 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 592 | { |
593 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
594 | filename, linenum, arg); | |
595 | } | |
5260325f | 596 | return 0; |
8efc0c15 | 597 | } |
598 | ||
599 | ||
aa3378df | 600 | /* |
601 | * Reads the config file and modifies the options accordingly. Options | |
602 | * should already be initialized before this call. This never returns if | |
603 | * there is an error. If the file does not exist, this returns immediately. | |
604 | */ | |
8efc0c15 | 605 | |
6ae2364d | 606 | void |
5260325f | 607 | read_config_file(const char *filename, const char *host, Options *options) |
8efc0c15 | 608 | { |
5260325f | 609 | FILE *f; |
610 | char line[1024]; | |
611 | int active, linenum; | |
612 | int bad_options = 0; | |
613 | ||
614 | /* Open the file. */ | |
615 | f = fopen(filename, "r"); | |
616 | if (!f) | |
617 | return; | |
618 | ||
619 | debug("Reading configuration data %.200s", filename); | |
620 | ||
aa3378df | 621 | /* |
622 | * Mark that we are now processing the options. This flag is turned | |
623 | * on/off by Host specifications. | |
624 | */ | |
5260325f | 625 | active = 1; |
626 | linenum = 0; | |
627 | while (fgets(line, sizeof(line), f)) { | |
628 | /* Update line number counter. */ | |
629 | linenum++; | |
630 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
631 | bad_options++; | |
632 | } | |
633 | fclose(f); | |
634 | if (bad_options > 0) | |
635 | fatal("%s: terminating, %d bad configuration options\n", | |
636 | filename, bad_options); | |
8efc0c15 | 637 | } |
638 | ||
aa3378df | 639 | /* |
640 | * Initializes options to special values that indicate that they have not yet | |
641 | * been set. Read_config_file will only set options with this value. Options | |
642 | * are processed in the following order: command line, user config file, | |
643 | * system config file. Last, fill_default_options is called. | |
644 | */ | |
8efc0c15 | 645 | |
6ae2364d | 646 | void |
5260325f | 647 | initialize_options(Options * options) |
8efc0c15 | 648 | { |
5260325f | 649 | memset(options, 'X', sizeof(*options)); |
650 | options->forward_agent = -1; | |
651 | options->forward_x11 = -1; | |
fa649821 | 652 | options->xauth_location = NULL; |
5260325f | 653 | options->gateway_ports = -1; |
654 | options->use_privileged_port = -1; | |
655 | options->rhosts_authentication = -1; | |
656 | options->rsa_authentication = -1; | |
1d1ffb87 | 657 | options->dsa_authentication = -1; |
5260325f | 658 | options->skey_authentication = -1; |
8efc0c15 | 659 | #ifdef KRB4 |
5260325f | 660 | options->kerberos_authentication = -1; |
8efc0c15 | 661 | #endif |
662 | #ifdef AFS | |
5260325f | 663 | options->kerberos_tgt_passing = -1; |
664 | options->afs_token_passing = -1; | |
8efc0c15 | 665 | #endif |
5260325f | 666 | options->password_authentication = -1; |
667 | options->rhosts_rsa_authentication = -1; | |
668 | options->fallback_to_rsh = -1; | |
669 | options->use_rsh = -1; | |
670 | options->batch_mode = -1; | |
671 | options->check_host_ip = -1; | |
672 | options->strict_host_key_checking = -1; | |
673 | options->compression = -1; | |
674 | options->keepalives = -1; | |
675 | options->compression_level = -1; | |
676 | options->port = -1; | |
677 | options->connection_attempts = -1; | |
678 | options->number_of_password_prompts = -1; | |
679 | options->cipher = -1; | |
a8be9f80 | 680 | options->ciphers = NULL; |
681 | options->protocol = SSH_PROTO_UNKNOWN; | |
5260325f | 682 | options->num_identity_files = 0; |
a306f2dd | 683 | options->num_identity_files2 = 0; |
5260325f | 684 | options->hostname = NULL; |
685 | options->proxy_command = NULL; | |
686 | options->user = NULL; | |
687 | options->escape_char = -1; | |
688 | options->system_hostfile = NULL; | |
689 | options->user_hostfile = NULL; | |
a306f2dd | 690 | options->system_hostfile2 = NULL; |
691 | options->user_hostfile2 = NULL; | |
5260325f | 692 | options->num_local_forwards = 0; |
693 | options->num_remote_forwards = 0; | |
694 | options->log_level = (LogLevel) - 1; | |
8efc0c15 | 695 | } |
696 | ||
aa3378df | 697 | /* |
698 | * Called after processing other sources of option data, this fills those | |
699 | * options for which no value has been specified with their default values. | |
700 | */ | |
8efc0c15 | 701 | |
6ae2364d | 702 | void |
5260325f | 703 | fill_default_options(Options * options) |
8efc0c15 | 704 | { |
5260325f | 705 | if (options->forward_agent == -1) |
71276795 | 706 | options->forward_agent = 0; |
5260325f | 707 | if (options->forward_x11 == -1) |
c8d54615 | 708 | options->forward_x11 = 0; |
fa649821 | 709 | #ifdef XAUTH_PATH |
710 | if (options->xauth_location == NULL) | |
711 | options->xauth_location = XAUTH_PATH; | |
712 | #endif /* XAUTH_PATH */ | |
5260325f | 713 | if (options->gateway_ports == -1) |
714 | options->gateway_ports = 0; | |
715 | if (options->use_privileged_port == -1) | |
716 | options->use_privileged_port = 1; | |
717 | if (options->rhosts_authentication == -1) | |
718 | options->rhosts_authentication = 1; | |
719 | if (options->rsa_authentication == -1) | |
720 | options->rsa_authentication = 1; | |
1d1ffb87 | 721 | if (options->dsa_authentication == -1) |
722 | options->dsa_authentication = 1; | |
5260325f | 723 | if (options->skey_authentication == -1) |
724 | options->skey_authentication = 0; | |
8efc0c15 | 725 | #ifdef KRB4 |
5260325f | 726 | if (options->kerberos_authentication == -1) |
727 | options->kerberos_authentication = 1; | |
8efc0c15 | 728 | #endif /* KRB4 */ |
729 | #ifdef AFS | |
5260325f | 730 | if (options->kerberos_tgt_passing == -1) |
731 | options->kerberos_tgt_passing = 1; | |
732 | if (options->afs_token_passing == -1) | |
733 | options->afs_token_passing = 1; | |
8efc0c15 | 734 | #endif /* AFS */ |
5260325f | 735 | if (options->password_authentication == -1) |
736 | options->password_authentication = 1; | |
737 | if (options->rhosts_rsa_authentication == -1) | |
738 | options->rhosts_rsa_authentication = 1; | |
739 | if (options->fallback_to_rsh == -1) | |
3f7a7e4a | 740 | options->fallback_to_rsh = 0; |
5260325f | 741 | if (options->use_rsh == -1) |
742 | options->use_rsh = 0; | |
743 | if (options->batch_mode == -1) | |
744 | options->batch_mode = 0; | |
745 | if (options->check_host_ip == -1) | |
746 | options->check_host_ip = 1; | |
747 | if (options->strict_host_key_checking == -1) | |
748 | options->strict_host_key_checking = 2; /* 2 is default */ | |
749 | if (options->compression == -1) | |
750 | options->compression = 0; | |
751 | if (options->keepalives == -1) | |
752 | options->keepalives = 1; | |
753 | if (options->compression_level == -1) | |
754 | options->compression_level = 6; | |
755 | if (options->port == -1) | |
756 | options->port = 0; /* Filled in ssh_connect. */ | |
757 | if (options->connection_attempts == -1) | |
758 | options->connection_attempts = 4; | |
759 | if (options->number_of_password_prompts == -1) | |
760 | options->number_of_password_prompts = 3; | |
761 | /* Selected in ssh_login(). */ | |
762 | if (options->cipher == -1) | |
763 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 764 | /* options->ciphers, default set in myproposals.h */ |
a8be9f80 | 765 | if (options->protocol == SSH_PROTO_UNKNOWN) |
a306f2dd | 766 | options->protocol = SSH_PROTO_1|SSH_PROTO_2|SSH_PROTO_1_PREFERRED; |
5260325f | 767 | if (options->num_identity_files == 0) { |
768 | options->identity_files[0] = | |
769 | xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1); | |
770 | sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY); | |
771 | options->num_identity_files = 1; | |
772 | } | |
a306f2dd | 773 | if (options->num_identity_files2 == 0) { |
774 | options->identity_files2[0] = | |
1d1ffb87 | 775 | xmalloc(2 + strlen(SSH_CLIENT_ID_DSA) + 1); |
776 | sprintf(options->identity_files2[0], "~/%.100s", SSH_CLIENT_ID_DSA); | |
a306f2dd | 777 | options->num_identity_files2 = 1; |
778 | } | |
5260325f | 779 | if (options->escape_char == -1) |
780 | options->escape_char = '~'; | |
781 | if (options->system_hostfile == NULL) | |
782 | options->system_hostfile = SSH_SYSTEM_HOSTFILE; | |
783 | if (options->user_hostfile == NULL) | |
784 | options->user_hostfile = SSH_USER_HOSTFILE; | |
a306f2dd | 785 | if (options->system_hostfile2 == NULL) |
786 | options->system_hostfile2 = SSH_SYSTEM_HOSTFILE2; | |
787 | if (options->user_hostfile2 == NULL) | |
788 | options->user_hostfile2 = SSH_USER_HOSTFILE2; | |
5260325f | 789 | if (options->log_level == (LogLevel) - 1) |
790 | options->log_level = SYSLOG_LEVEL_INFO; | |
791 | /* options->proxy_command should not be set by default */ | |
792 | /* options->user will be set in the main program if appropriate */ | |
793 | /* options->hostname will be set in the main program if appropriate */ | |
8efc0c15 | 794 | } |