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Commit | Line | Data |
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8efc0c15 | 1 | /* |
5260325f | 2 | * |
3 | * readconf.c | |
4 | * | |
5 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
6 | * | |
7 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
8 | * All rights reserved | |
9 | * | |
10 | * Created: Sat Apr 22 00:03:10 1995 ylo | |
11 | * | |
12 | * Functions for reading the configuration files. | |
13 | * | |
14 | */ | |
8efc0c15 | 15 | |
16 | #include "includes.h" | |
17 | RCSID("$Id$"); | |
18 | ||
19 | #include "ssh.h" | |
20 | #include "cipher.h" | |
21 | #include "readconf.h" | |
7368a6c8 | 22 | #include "match.h" |
8efc0c15 | 23 | #include "xmalloc.h" |
24 | ||
25 | /* Format of the configuration file: | |
26 | ||
27 | # Configuration data is parsed as follows: | |
28 | # 1. command line options | |
29 | # 2. user-specific file | |
30 | # 3. system-wide file | |
31 | # Any configuration value is only changed the first time it is set. | |
32 | # Thus, host-specific definitions should be at the beginning of the | |
33 | # configuration file, and defaults at the end. | |
34 | ||
35 | # Host-specific declarations. These may override anything above. A single | |
36 | # host may match multiple declarations; these are processed in the order | |
37 | # that they are given in. | |
38 | ||
39 | Host *.ngs.fi ngs.fi | |
40 | FallBackToRsh no | |
41 | ||
42 | Host fake.com | |
43 | HostName another.host.name.real.org | |
44 | User blaah | |
45 | Port 34289 | |
46 | ForwardX11 no | |
47 | ForwardAgent no | |
48 | ||
49 | Host books.com | |
50 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
51 | Cipher 3des | |
52 | ||
53 | Host fascist.blob.com | |
54 | Port 23123 | |
55 | User tylonen | |
56 | RhostsAuthentication no | |
57 | PasswordAuthentication no | |
58 | ||
59 | Host puukko.hut.fi | |
60 | User t35124p | |
61 | ProxyCommand ssh-proxy %h %p | |
62 | ||
63 | Host *.fr | |
64 | UseRsh yes | |
65 | ||
66 | Host *.su | |
67 | Cipher none | |
68 | PasswordAuthentication no | |
69 | ||
70 | # Defaults for various options | |
71 | Host * | |
72 | ForwardAgent no | |
73 | ForwardX11 yes | |
74 | RhostsAuthentication yes | |
75 | PasswordAuthentication yes | |
76 | RSAAuthentication yes | |
77 | RhostsRSAAuthentication yes | |
78 | FallBackToRsh no | |
79 | UseRsh no | |
80 | StrictHostKeyChecking yes | |
81 | KeepAlives no | |
82 | IdentityFile ~/.ssh/identity | |
83 | Port 22 | |
84 | EscapeChar ~ | |
85 | ||
86 | */ | |
87 | ||
88 | /* Keyword tokens. */ | |
89 | ||
5260325f | 90 | typedef enum { |
91 | oBadOption, | |
92 | oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, | |
93 | oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, | |
94 | oSkeyAuthentication, | |
8efc0c15 | 95 | #ifdef KRB4 |
5260325f | 96 | oKerberosAuthentication, |
8efc0c15 | 97 | #endif /* KRB4 */ |
98 | #ifdef AFS | |
5260325f | 99 | oKerberosTgtPassing, oAFSTokenPassing, |
8efc0c15 | 100 | #endif |
5260325f | 101 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
102 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
103 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
104 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
105 | oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, | |
106 | oUsePrivilegedPort, oLogLevel | |
8efc0c15 | 107 | } OpCodes; |
108 | ||
109 | /* Textual representations of the tokens. */ | |
110 | ||
5260325f | 111 | static struct { |
112 | const char *name; | |
113 | OpCodes opcode; | |
114 | } keywords[] = { | |
115 | { "forwardagent", oForwardAgent }, | |
116 | { "forwardx11", oForwardX11 }, | |
117 | { "gatewayports", oGatewayPorts }, | |
118 | { "useprivilegedport", oUsePrivilegedPort }, | |
119 | { "rhostsauthentication", oRhostsAuthentication }, | |
120 | { "passwordauthentication", oPasswordAuthentication }, | |
121 | { "rsaauthentication", oRSAAuthentication }, | |
122 | { "skeyauthentication", oSkeyAuthentication }, | |
8efc0c15 | 123 | #ifdef KRB4 |
5260325f | 124 | { "kerberosauthentication", oKerberosAuthentication }, |
8efc0c15 | 125 | #endif /* KRB4 */ |
126 | #ifdef AFS | |
5260325f | 127 | { "kerberostgtpassing", oKerberosTgtPassing }, |
128 | { "afstokenpassing", oAFSTokenPassing }, | |
8efc0c15 | 129 | #endif |
5260325f | 130 | { "fallbacktorsh", oFallBackToRsh }, |
131 | { "usersh", oUseRsh }, | |
132 | { "identityfile", oIdentityFile }, | |
133 | { "hostname", oHostName }, | |
134 | { "proxycommand", oProxyCommand }, | |
135 | { "port", oPort }, | |
136 | { "cipher", oCipher }, | |
137 | { "remoteforward", oRemoteForward }, | |
138 | { "localforward", oLocalForward }, | |
139 | { "user", oUser }, | |
140 | { "host", oHost }, | |
141 | { "escapechar", oEscapeChar }, | |
142 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
143 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
144 | { "userknownhostsfile", oUserKnownHostsFile }, | |
145 | { "connectionattempts", oConnectionAttempts }, | |
146 | { "batchmode", oBatchMode }, | |
147 | { "checkhostip", oCheckHostIP }, | |
148 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
149 | { "compression", oCompression }, | |
150 | { "compressionlevel", oCompressionLevel }, | |
151 | { "keepalive", oKeepAlives }, | |
152 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, | |
153 | { "tisauthentication", oTISAuthentication }, | |
154 | { "loglevel", oLogLevel }, | |
155 | { NULL, 0 } | |
6a17f9c2 | 156 | }; |
157 | ||
8efc0c15 | 158 | /* Characters considered whitespace in strtok calls. */ |
159 | #define WHITESPACE " \t\r\n" | |
160 | ||
161 | ||
aa3378df | 162 | /* |
163 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
164 | * error. | |
165 | */ | |
8efc0c15 | 166 | |
5260325f | 167 | void |
57112b5a | 168 | add_local_forward(Options *options, u_short port, const char *host, |
169 | u_short host_port) | |
8efc0c15 | 170 | { |
5260325f | 171 | Forward *fwd; |
172 | extern uid_t original_real_uid; | |
5260325f | 173 | if (port < IPPORT_RESERVED && original_real_uid != 0) |
174 | fatal("Privileged ports can only be forwarded by root.\n"); | |
175 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
176 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
177 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
178 | fwd->port = port; | |
179 | fwd->host = xstrdup(host); | |
180 | fwd->host_port = host_port; | |
8efc0c15 | 181 | } |
182 | ||
aa3378df | 183 | /* |
184 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
185 | * an error. | |
186 | */ | |
8efc0c15 | 187 | |
5260325f | 188 | void |
57112b5a | 189 | add_remote_forward(Options *options, u_short port, const char *host, |
190 | u_short host_port) | |
8efc0c15 | 191 | { |
5260325f | 192 | Forward *fwd; |
193 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
194 | fatal("Too many remote forwards (max %d).", | |
195 | SSH_MAX_FORWARDS_PER_DIRECTION); | |
196 | fwd = &options->remote_forwards[options->num_remote_forwards++]; | |
197 | fwd->port = port; | |
198 | fwd->host = xstrdup(host); | |
199 | fwd->host_port = host_port; | |
8efc0c15 | 200 | } |
201 | ||
aa3378df | 202 | /* |
203 | * Returns the number of the token pointed to by cp of length len. Never | |
204 | * returns if the token is not known. | |
205 | */ | |
8efc0c15 | 206 | |
5260325f | 207 | static OpCodes |
208 | parse_token(const char *cp, const char *filename, int linenum) | |
8efc0c15 | 209 | { |
5260325f | 210 | unsigned int i; |
8efc0c15 | 211 | |
5260325f | 212 | for (i = 0; keywords[i].name; i++) |
aa3378df | 213 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 214 | return keywords[i].opcode; |
8efc0c15 | 215 | |
5260325f | 216 | fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", |
217 | filename, linenum, cp); | |
218 | return oBadOption; | |
8efc0c15 | 219 | } |
220 | ||
aa3378df | 221 | /* |
222 | * Processes a single option line as used in the configuration files. This | |
223 | * only sets those values that have not already been set. | |
224 | */ | |
8efc0c15 | 225 | |
e7c0f9d5 | 226 | int |
227 | process_config_line(Options *options, const char *host, | |
5260325f | 228 | char *line, const char *filename, int linenum, |
229 | int *activep) | |
8efc0c15 | 230 | { |
aa3378df | 231 | char buf[256], *cp, *string, **charptr, *cp2; |
57112b5a | 232 | int opcode, *intptr, value; |
233 | u_short fwd_port, fwd_host_port; | |
5260325f | 234 | |
235 | /* Skip leading whitespace. */ | |
236 | cp = line + strspn(line, WHITESPACE); | |
237 | if (!*cp || *cp == '\n' || *cp == '#') | |
238 | return 0; | |
239 | ||
aa3378df | 240 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ |
5260325f | 241 | cp = strtok(cp, WHITESPACE); |
5260325f | 242 | opcode = parse_token(cp, filename, linenum); |
243 | ||
244 | switch (opcode) { | |
245 | case oBadOption: | |
aa3378df | 246 | /* don't panic, but count bad options */ |
247 | return -1; | |
5260325f | 248 | /* NOTREACHED */ |
249 | case oForwardAgent: | |
250 | intptr = &options->forward_agent; | |
251 | parse_flag: | |
252 | cp = strtok(NULL, WHITESPACE); | |
253 | if (!cp) | |
254 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
255 | value = 0; /* To avoid compiler warning... */ | |
256 | if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0) | |
257 | value = 1; | |
258 | else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0) | |
259 | value = 0; | |
260 | else | |
261 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
262 | if (*activep && *intptr == -1) | |
263 | *intptr = value; | |
264 | break; | |
265 | ||
266 | case oForwardX11: | |
267 | intptr = &options->forward_x11; | |
268 | goto parse_flag; | |
269 | ||
270 | case oGatewayPorts: | |
271 | intptr = &options->gateway_ports; | |
272 | goto parse_flag; | |
273 | ||
274 | case oUsePrivilegedPort: | |
275 | intptr = &options->use_privileged_port; | |
276 | goto parse_flag; | |
277 | ||
278 | case oRhostsAuthentication: | |
279 | intptr = &options->rhosts_authentication; | |
280 | goto parse_flag; | |
281 | ||
282 | case oPasswordAuthentication: | |
283 | intptr = &options->password_authentication; | |
284 | goto parse_flag; | |
285 | ||
286 | case oRSAAuthentication: | |
287 | intptr = &options->rsa_authentication; | |
288 | goto parse_flag; | |
289 | ||
290 | case oRhostsRSAAuthentication: | |
291 | intptr = &options->rhosts_rsa_authentication; | |
292 | goto parse_flag; | |
293 | ||
294 | case oTISAuthentication: | |
295 | /* fallthrough, there is no difference on the client side */ | |
296 | case oSkeyAuthentication: | |
297 | intptr = &options->skey_authentication; | |
298 | goto parse_flag; | |
8efc0c15 | 299 | |
300 | #ifdef KRB4 | |
5260325f | 301 | case oKerberosAuthentication: |
302 | intptr = &options->kerberos_authentication; | |
303 | goto parse_flag; | |
8efc0c15 | 304 | #endif /* KRB4 */ |
305 | ||
306 | #ifdef AFS | |
5260325f | 307 | case oKerberosTgtPassing: |
308 | intptr = &options->kerberos_tgt_passing; | |
309 | goto parse_flag; | |
8efc0c15 | 310 | |
5260325f | 311 | case oAFSTokenPassing: |
312 | intptr = &options->afs_token_passing; | |
313 | goto parse_flag; | |
8efc0c15 | 314 | #endif |
5260325f | 315 | |
316 | case oFallBackToRsh: | |
317 | intptr = &options->fallback_to_rsh; | |
318 | goto parse_flag; | |
319 | ||
320 | case oUseRsh: | |
321 | intptr = &options->use_rsh; | |
322 | goto parse_flag; | |
323 | ||
324 | case oBatchMode: | |
325 | intptr = &options->batch_mode; | |
326 | goto parse_flag; | |
327 | ||
328 | case oCheckHostIP: | |
329 | intptr = &options->check_host_ip; | |
330 | goto parse_flag; | |
331 | ||
332 | case oStrictHostKeyChecking: | |
333 | intptr = &options->strict_host_key_checking; | |
334 | cp = strtok(NULL, WHITESPACE); | |
335 | if (!cp) | |
336 | fatal("%.200s line %d: Missing yes/no argument.", | |
337 | filename, linenum); | |
338 | value = 0; /* To avoid compiler warning... */ | |
339 | if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0) | |
340 | value = 1; | |
341 | else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0) | |
342 | value = 0; | |
343 | else if (strcmp(cp, "ask") == 0) | |
344 | value = 2; | |
345 | else | |
346 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
347 | if (*activep && *intptr == -1) | |
348 | *intptr = value; | |
349 | break; | |
350 | ||
351 | case oCompression: | |
352 | intptr = &options->compression; | |
353 | goto parse_flag; | |
354 | ||
355 | case oKeepAlives: | |
356 | intptr = &options->keepalives; | |
357 | goto parse_flag; | |
358 | ||
359 | case oNumberOfPasswordPrompts: | |
360 | intptr = &options->number_of_password_prompts; | |
361 | goto parse_int; | |
362 | ||
363 | case oCompressionLevel: | |
364 | intptr = &options->compression_level; | |
365 | goto parse_int; | |
366 | ||
367 | case oIdentityFile: | |
368 | cp = strtok(NULL, WHITESPACE); | |
369 | if (!cp) | |
370 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
371 | if (*activep) { | |
372 | if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES) | |
373 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
374 | filename, linenum, SSH_MAX_IDENTITY_FILES); | |
375 | options->identity_files[options->num_identity_files++] = xstrdup(cp); | |
376 | } | |
377 | break; | |
378 | ||
379 | case oUser: | |
380 | charptr = &options->user; | |
381 | parse_string: | |
382 | cp = strtok(NULL, WHITESPACE); | |
383 | if (!cp) | |
384 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
385 | if (*activep && *charptr == NULL) | |
386 | *charptr = xstrdup(cp); | |
387 | break; | |
388 | ||
389 | case oGlobalKnownHostsFile: | |
390 | charptr = &options->system_hostfile; | |
391 | goto parse_string; | |
392 | ||
393 | case oUserKnownHostsFile: | |
394 | charptr = &options->user_hostfile; | |
395 | goto parse_string; | |
396 | ||
397 | case oHostName: | |
398 | charptr = &options->hostname; | |
399 | goto parse_string; | |
400 | ||
401 | case oProxyCommand: | |
402 | charptr = &options->proxy_command; | |
403 | string = xstrdup(""); | |
404 | while ((cp = strtok(NULL, WHITESPACE)) != NULL) { | |
405 | string = xrealloc(string, strlen(string) + strlen(cp) + 2); | |
406 | strcat(string, " "); | |
407 | strcat(string, cp); | |
408 | } | |
409 | if (*activep && *charptr == NULL) | |
410 | *charptr = string; | |
411 | else | |
412 | xfree(string); | |
413 | return 0; | |
414 | ||
415 | case oPort: | |
416 | intptr = &options->port; | |
417 | parse_int: | |
418 | cp = strtok(NULL, WHITESPACE); | |
419 | if (!cp) | |
420 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
421 | if (cp[0] < '0' || cp[0] > '9') | |
422 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
aa3378df | 423 | |
424 | /* Octal, decimal, or hex format? */ | |
425 | value = strtol(cp, &cp2, 0); | |
426 | if (cp == cp2) | |
427 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
5260325f | 428 | if (*activep && *intptr == -1) |
429 | *intptr = value; | |
430 | break; | |
431 | ||
432 | case oConnectionAttempts: | |
433 | intptr = &options->connection_attempts; | |
434 | goto parse_int; | |
435 | ||
436 | case oCipher: | |
437 | intptr = &options->cipher; | |
438 | cp = strtok(NULL, WHITESPACE); | |
439 | value = cipher_number(cp); | |
440 | if (value == -1) | |
441 | fatal("%.200s line %d: Bad cipher '%s'.", | |
442 | filename, linenum, cp ? cp : "<NONE>"); | |
443 | if (*activep && *intptr == -1) | |
444 | *intptr = value; | |
445 | break; | |
446 | ||
447 | case oLogLevel: | |
448 | intptr = (int *) &options->log_level; | |
449 | cp = strtok(NULL, WHITESPACE); | |
450 | value = log_level_number(cp); | |
451 | if (value == (LogLevel) - 1) | |
452 | fatal("%.200s line %d: unsupported log level '%s'\n", | |
453 | filename, linenum, cp ? cp : "<NONE>"); | |
454 | if (*activep && (LogLevel) * intptr == -1) | |
455 | *intptr = (LogLevel) value; | |
456 | break; | |
457 | ||
458 | case oRemoteForward: | |
459 | cp = strtok(NULL, WHITESPACE); | |
460 | if (!cp) | |
461 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
462 | if (cp[0] < '0' || cp[0] > '9') | |
463 | fatal("%.200s line %d: Badly formatted port number.", | |
464 | filename, linenum); | |
465 | fwd_port = atoi(cp); | |
466 | cp = strtok(NULL, WHITESPACE); | |
467 | if (!cp) | |
468 | fatal("%.200s line %d: Missing second argument.", | |
469 | filename, linenum); | |
57112b5a | 470 | if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
5260325f | 471 | fatal("%.200s line %d: Badly formatted host:port.", |
472 | filename, linenum); | |
473 | if (*activep) | |
474 | add_remote_forward(options, fwd_port, buf, fwd_host_port); | |
475 | break; | |
476 | ||
477 | case oLocalForward: | |
478 | cp = strtok(NULL, WHITESPACE); | |
479 | if (!cp) | |
480 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
481 | if (cp[0] < '0' || cp[0] > '9') | |
482 | fatal("%.200s line %d: Badly formatted port number.", | |
483 | filename, linenum); | |
484 | fwd_port = atoi(cp); | |
485 | cp = strtok(NULL, WHITESPACE); | |
486 | if (!cp) | |
487 | fatal("%.200s line %d: Missing second argument.", | |
488 | filename, linenum); | |
57112b5a | 489 | if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
5260325f | 490 | fatal("%.200s line %d: Badly formatted host:port.", |
491 | filename, linenum); | |
492 | if (*activep) | |
493 | add_local_forward(options, fwd_port, buf, fwd_host_port); | |
494 | break; | |
495 | ||
496 | case oHost: | |
497 | *activep = 0; | |
498 | while ((cp = strtok(NULL, WHITESPACE)) != NULL) | |
499 | if (match_pattern(host, cp)) { | |
500 | debug("Applying options for %.100s", cp); | |
501 | *activep = 1; | |
502 | break; | |
503 | } | |
aa3378df | 504 | /* Avoid garbage check below, as strtok already returned NULL. */ |
5260325f | 505 | return 0; |
506 | ||
507 | case oEscapeChar: | |
508 | intptr = &options->escape_char; | |
509 | cp = strtok(NULL, WHITESPACE); | |
510 | if (!cp) | |
511 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
512 | if (cp[0] == '^' && cp[2] == 0 && | |
513 | (unsigned char) cp[1] >= 64 && (unsigned char) cp[1] < 128) | |
514 | value = (unsigned char) cp[1] & 31; | |
515 | else if (strlen(cp) == 1) | |
516 | value = (unsigned char) cp[0]; | |
517 | else if (strcmp(cp, "none") == 0) | |
518 | value = -2; | |
519 | else { | |
520 | fatal("%.200s line %d: Bad escape character.", | |
521 | filename, linenum); | |
522 | /* NOTREACHED */ | |
523 | value = 0; /* Avoid compiler warning. */ | |
524 | } | |
525 | if (*activep && *intptr == -1) | |
526 | *intptr = value; | |
527 | break; | |
528 | ||
529 | default: | |
530 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
531 | } | |
532 | ||
533 | /* Check that there is no garbage at end of line. */ | |
534 | if (strtok(NULL, WHITESPACE) != NULL) | |
535 | fatal("%.200s line %d: garbage at end of line.", | |
536 | filename, linenum); | |
537 | return 0; | |
8efc0c15 | 538 | } |
539 | ||
540 | ||
aa3378df | 541 | /* |
542 | * Reads the config file and modifies the options accordingly. Options | |
543 | * should already be initialized before this call. This never returns if | |
544 | * there is an error. If the file does not exist, this returns immediately. | |
545 | */ | |
8efc0c15 | 546 | |
5260325f | 547 | void |
548 | read_config_file(const char *filename, const char *host, Options *options) | |
8efc0c15 | 549 | { |
5260325f | 550 | FILE *f; |
551 | char line[1024]; | |
552 | int active, linenum; | |
553 | int bad_options = 0; | |
554 | ||
555 | /* Open the file. */ | |
556 | f = fopen(filename, "r"); | |
557 | if (!f) | |
558 | return; | |
559 | ||
560 | debug("Reading configuration data %.200s", filename); | |
561 | ||
aa3378df | 562 | /* |
563 | * Mark that we are now processing the options. This flag is turned | |
564 | * on/off by Host specifications. | |
565 | */ | |
5260325f | 566 | active = 1; |
567 | linenum = 0; | |
568 | while (fgets(line, sizeof(line), f)) { | |
569 | /* Update line number counter. */ | |
570 | linenum++; | |
571 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
572 | bad_options++; | |
573 | } | |
574 | fclose(f); | |
575 | if (bad_options > 0) | |
576 | fatal("%s: terminating, %d bad configuration options\n", | |
577 | filename, bad_options); | |
8efc0c15 | 578 | } |
579 | ||
aa3378df | 580 | /* |
581 | * Initializes options to special values that indicate that they have not yet | |
582 | * been set. Read_config_file will only set options with this value. Options | |
583 | * are processed in the following order: command line, user config file, | |
584 | * system config file. Last, fill_default_options is called. | |
585 | */ | |
8efc0c15 | 586 | |
5260325f | 587 | void |
588 | initialize_options(Options * options) | |
8efc0c15 | 589 | { |
5260325f | 590 | memset(options, 'X', sizeof(*options)); |
591 | options->forward_agent = -1; | |
592 | options->forward_x11 = -1; | |
593 | options->gateway_ports = -1; | |
594 | options->use_privileged_port = -1; | |
595 | options->rhosts_authentication = -1; | |
596 | options->rsa_authentication = -1; | |
597 | options->skey_authentication = -1; | |
8efc0c15 | 598 | #ifdef KRB4 |
5260325f | 599 | options->kerberos_authentication = -1; |
8efc0c15 | 600 | #endif |
601 | #ifdef AFS | |
5260325f | 602 | options->kerberos_tgt_passing = -1; |
603 | options->afs_token_passing = -1; | |
8efc0c15 | 604 | #endif |
5260325f | 605 | options->password_authentication = -1; |
606 | options->rhosts_rsa_authentication = -1; | |
607 | options->fallback_to_rsh = -1; | |
608 | options->use_rsh = -1; | |
609 | options->batch_mode = -1; | |
610 | options->check_host_ip = -1; | |
611 | options->strict_host_key_checking = -1; | |
612 | options->compression = -1; | |
613 | options->keepalives = -1; | |
614 | options->compression_level = -1; | |
615 | options->port = -1; | |
616 | options->connection_attempts = -1; | |
617 | options->number_of_password_prompts = -1; | |
618 | options->cipher = -1; | |
619 | options->num_identity_files = 0; | |
620 | options->hostname = NULL; | |
621 | options->proxy_command = NULL; | |
622 | options->user = NULL; | |
623 | options->escape_char = -1; | |
624 | options->system_hostfile = NULL; | |
625 | options->user_hostfile = NULL; | |
626 | options->num_local_forwards = 0; | |
627 | options->num_remote_forwards = 0; | |
628 | options->log_level = (LogLevel) - 1; | |
8efc0c15 | 629 | } |
630 | ||
aa3378df | 631 | /* |
632 | * Called after processing other sources of option data, this fills those | |
633 | * options for which no value has been specified with their default values. | |
634 | */ | |
8efc0c15 | 635 | |
5260325f | 636 | void |
637 | fill_default_options(Options * options) | |
8efc0c15 | 638 | { |
5260325f | 639 | if (options->forward_agent == -1) |
640 | options->forward_agent = 1; | |
641 | if (options->forward_x11 == -1) | |
c8d54615 | 642 | options->forward_x11 = 0; |
5260325f | 643 | if (options->gateway_ports == -1) |
644 | options->gateway_ports = 0; | |
645 | if (options->use_privileged_port == -1) | |
646 | options->use_privileged_port = 1; | |
647 | if (options->rhosts_authentication == -1) | |
648 | options->rhosts_authentication = 1; | |
649 | if (options->rsa_authentication == -1) | |
650 | options->rsa_authentication = 1; | |
651 | if (options->skey_authentication == -1) | |
652 | options->skey_authentication = 0; | |
8efc0c15 | 653 | #ifdef KRB4 |
5260325f | 654 | if (options->kerberos_authentication == -1) |
655 | options->kerberos_authentication = 1; | |
8efc0c15 | 656 | #endif /* KRB4 */ |
657 | #ifdef AFS | |
5260325f | 658 | if (options->kerberos_tgt_passing == -1) |
659 | options->kerberos_tgt_passing = 1; | |
660 | if (options->afs_token_passing == -1) | |
661 | options->afs_token_passing = 1; | |
8efc0c15 | 662 | #endif /* AFS */ |
5260325f | 663 | if (options->password_authentication == -1) |
664 | options->password_authentication = 1; | |
665 | if (options->rhosts_rsa_authentication == -1) | |
666 | options->rhosts_rsa_authentication = 1; | |
667 | if (options->fallback_to_rsh == -1) | |
668 | options->fallback_to_rsh = 1; | |
669 | if (options->use_rsh == -1) | |
670 | options->use_rsh = 0; | |
671 | if (options->batch_mode == -1) | |
672 | options->batch_mode = 0; | |
673 | if (options->check_host_ip == -1) | |
674 | options->check_host_ip = 1; | |
675 | if (options->strict_host_key_checking == -1) | |
676 | options->strict_host_key_checking = 2; /* 2 is default */ | |
677 | if (options->compression == -1) | |
678 | options->compression = 0; | |
679 | if (options->keepalives == -1) | |
680 | options->keepalives = 1; | |
681 | if (options->compression_level == -1) | |
682 | options->compression_level = 6; | |
683 | if (options->port == -1) | |
684 | options->port = 0; /* Filled in ssh_connect. */ | |
685 | if (options->connection_attempts == -1) | |
686 | options->connection_attempts = 4; | |
687 | if (options->number_of_password_prompts == -1) | |
688 | options->number_of_password_prompts = 3; | |
689 | /* Selected in ssh_login(). */ | |
690 | if (options->cipher == -1) | |
691 | options->cipher = SSH_CIPHER_NOT_SET; | |
692 | if (options->num_identity_files == 0) { | |
693 | options->identity_files[0] = | |
694 | xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1); | |
695 | sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY); | |
696 | options->num_identity_files = 1; | |
697 | } | |
698 | if (options->escape_char == -1) | |
699 | options->escape_char = '~'; | |
700 | if (options->system_hostfile == NULL) | |
701 | options->system_hostfile = SSH_SYSTEM_HOSTFILE; | |
702 | if (options->user_hostfile == NULL) | |
703 | options->user_hostfile = SSH_USER_HOSTFILE; | |
704 | if (options->log_level == (LogLevel) - 1) | |
705 | options->log_level = SYSLOG_LEVEL_INFO; | |
706 | /* options->proxy_command should not be set by default */ | |
707 | /* options->user will be set in the main program if appropriate */ | |
708 | /* options->hostname will be set in the main program if appropriate */ | |
8efc0c15 | 709 | } |