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