]>
Commit | Line | Data |
---|---|---|
8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * Functions for reading the configuration files. |
6ae2364d | 6 | * |
bcbf86ec | 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". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
14 | #include "includes.h" | |
94ec8c6b | 15 | RCSID("$OpenBSD: readconf.c,v 1.49 2000/10/11 20:27:23 markus Exp $"); |
8efc0c15 | 16 | |
17 | #include "ssh.h" | |
8efc0c15 | 18 | #include "readconf.h" |
7368a6c8 | 19 | #include "match.h" |
8efc0c15 | 20 | #include "xmalloc.h" |
a8be9f80 | 21 | #include "compat.h" |
8efc0c15 | 22 | |
23 | /* Format of the configuration file: | |
24 | ||
25 | # Configuration data is parsed as follows: | |
26 | # 1. command line options | |
27 | # 2. user-specific file | |
28 | # 3. system-wide file | |
29 | # Any configuration value is only changed the first time it is set. | |
30 | # Thus, host-specific definitions should be at the beginning of the | |
31 | # configuration file, and defaults at the end. | |
32 | ||
33 | # Host-specific declarations. These may override anything above. A single | |
34 | # host may match multiple declarations; these are processed in the order | |
35 | # that they are given in. | |
36 | ||
37 | Host *.ngs.fi ngs.fi | |
38 | FallBackToRsh no | |
39 | ||
40 | Host fake.com | |
41 | HostName another.host.name.real.org | |
42 | User blaah | |
43 | Port 34289 | |
44 | ForwardX11 no | |
45 | ForwardAgent no | |
46 | ||
47 | Host books.com | |
48 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
49 | Cipher 3des | |
50 | ||
51 | Host fascist.blob.com | |
52 | Port 23123 | |
53 | User tylonen | |
54 | RhostsAuthentication no | |
55 | PasswordAuthentication no | |
56 | ||
57 | Host puukko.hut.fi | |
58 | User t35124p | |
59 | ProxyCommand ssh-proxy %h %p | |
60 | ||
61 | Host *.fr | |
62 | UseRsh yes | |
63 | ||
64 | Host *.su | |
65 | Cipher none | |
66 | PasswordAuthentication no | |
67 | ||
68 | # Defaults for various options | |
69 | Host * | |
70 | ForwardAgent no | |
71 | ForwardX11 yes | |
72 | RhostsAuthentication yes | |
73 | PasswordAuthentication yes | |
74 | RSAAuthentication yes | |
75 | RhostsRSAAuthentication yes | |
76 | FallBackToRsh no | |
77 | UseRsh no | |
78 | StrictHostKeyChecking yes | |
79 | KeepAlives no | |
80 | IdentityFile ~/.ssh/identity | |
81 | Port 22 | |
82 | EscapeChar ~ | |
83 | ||
84 | */ | |
85 | ||
86 | /* Keyword tokens. */ | |
87 | ||
5260325f | 88 | typedef enum { |
89 | oBadOption, | |
90 | oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, | |
91 | oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, | |
fa649821 | 92 | oSkeyAuthentication, oXAuthLocation, |
8efc0c15 | 93 | #ifdef KRB4 |
5260325f | 94 | oKerberosAuthentication, |
8efc0c15 | 95 | #endif /* KRB4 */ |
96 | #ifdef AFS | |
5260325f | 97 | oKerberosTgtPassing, oAFSTokenPassing, |
8efc0c15 | 98 | #endif |
5260325f | 99 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
100 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
101 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
102 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
103 | oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, | |
a306f2dd | 104 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oIdentityFile2, |
94ec8c6b | 105 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oDSAAuthentication, |
106 | oKbdInteractiveAuthentication, oKbdInteractiveDevices | |
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 }, | |
fa649821 | 117 | { "xauthlocation", oXAuthLocation }, |
5260325f | 118 | { "gatewayports", oGatewayPorts }, |
119 | { "useprivilegedport", oUsePrivilegedPort }, | |
120 | { "rhostsauthentication", oRhostsAuthentication }, | |
121 | { "passwordauthentication", oPasswordAuthentication }, | |
94ec8c6b | 122 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
123 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 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; |
3c62e7eb | 177 | #ifndef HAVE_CYGWIN |
5260325f | 178 | extern uid_t original_real_uid; |
5260325f | 179 | if (port < IPPORT_RESERVED && original_real_uid != 0) |
180 | fatal("Privileged ports can only be forwarded by root.\n"); | |
3c62e7eb | 181 | #endif |
5260325f | 182 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
183 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
184 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
185 | fwd->port = port; | |
186 | fwd->host = xstrdup(host); | |
187 | fwd->host_port = host_port; | |
8efc0c15 | 188 | } |
189 | ||
aa3378df | 190 | /* |
191 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
192 | * an error. | |
193 | */ | |
8efc0c15 | 194 | |
6ae2364d | 195 | void |
57112b5a | 196 | add_remote_forward(Options *options, u_short port, const char *host, |
197 | u_short host_port) | |
8efc0c15 | 198 | { |
5260325f | 199 | Forward *fwd; |
200 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
201 | fatal("Too many remote forwards (max %d).", | |
202 | SSH_MAX_FORWARDS_PER_DIRECTION); | |
203 | fwd = &options->remote_forwards[options->num_remote_forwards++]; | |
204 | fwd->port = port; | |
205 | fwd->host = xstrdup(host); | |
206 | fwd->host_port = host_port; | |
8efc0c15 | 207 | } |
208 | ||
aa3378df | 209 | /* |
210 | * Returns the number of the token pointed to by cp of length len. Never | |
211 | * returns if the token is not known. | |
212 | */ | |
8efc0c15 | 213 | |
6ae2364d | 214 | static OpCodes |
5260325f | 215 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 216 | { |
5260325f | 217 | unsigned int i; |
8efc0c15 | 218 | |
5260325f | 219 | for (i = 0; keywords[i].name; i++) |
aa3378df | 220 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 221 | return keywords[i].opcode; |
8efc0c15 | 222 | |
5260325f | 223 | fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", |
224 | filename, linenum, cp); | |
225 | return oBadOption; | |
8efc0c15 | 226 | } |
227 | ||
aa3378df | 228 | /* |
229 | * Processes a single option line as used in the configuration files. This | |
230 | * only sets those values that have not already been set. | |
231 | */ | |
8efc0c15 | 232 | |
e7c0f9d5 | 233 | int |
234 | process_config_line(Options *options, const char *host, | |
5260325f | 235 | char *line, const char *filename, int linenum, |
236 | int *activep) | |
8efc0c15 | 237 | { |
089fbbd2 | 238 | char buf[256], *s, *string, **charptr, *endofnumber, *keyword, *arg; |
57112b5a | 239 | int opcode, *intptr, value; |
240 | u_short fwd_port, fwd_host_port; | |
5260325f | 241 | |
704b1659 | 242 | s = line; |
243 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
244 | keyword = strdelim(&s); | |
245 | /* Ignore leading whitespace. */ | |
246 | if (*keyword == '\0') | |
247 | keyword = strdelim(&s); | |
248 | if (!*keyword || *keyword == '\n' || *keyword == '#') | |
5260325f | 249 | return 0; |
250 | ||
089fbbd2 | 251 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 252 | |
253 | switch (opcode) { | |
254 | case oBadOption: | |
aa3378df | 255 | /* don't panic, but count bad options */ |
256 | return -1; | |
5260325f | 257 | /* NOTREACHED */ |
258 | case oForwardAgent: | |
259 | intptr = &options->forward_agent; | |
260 | parse_flag: | |
704b1659 | 261 | arg = strdelim(&s); |
089fbbd2 | 262 | if (!arg || *arg == '\0') |
5260325f | 263 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
264 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 265 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 266 | value = 1; |
089fbbd2 | 267 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 268 | value = 0; |
269 | else | |
270 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
271 | if (*activep && *intptr == -1) | |
272 | *intptr = value; | |
273 | break; | |
274 | ||
275 | case oForwardX11: | |
276 | intptr = &options->forward_x11; | |
277 | goto parse_flag; | |
278 | ||
279 | case oGatewayPorts: | |
280 | intptr = &options->gateway_ports; | |
281 | goto parse_flag; | |
282 | ||
283 | case oUsePrivilegedPort: | |
284 | intptr = &options->use_privileged_port; | |
285 | goto parse_flag; | |
286 | ||
287 | case oRhostsAuthentication: | |
288 | intptr = &options->rhosts_authentication; | |
289 | goto parse_flag; | |
290 | ||
291 | case oPasswordAuthentication: | |
292 | intptr = &options->password_authentication; | |
293 | goto parse_flag; | |
294 | ||
94ec8c6b | 295 | case oKbdInteractiveAuthentication: |
296 | intptr = &options->kbd_interactive_authentication; | |
297 | goto parse_flag; | |
298 | ||
299 | case oKbdInteractiveDevices: | |
300 | charptr = &options->kbd_interactive_devices; | |
301 | goto parse_string; | |
302 | ||
1d1ffb87 | 303 | case oDSAAuthentication: |
304 | intptr = &options->dsa_authentication; | |
305 | goto parse_flag; | |
306 | ||
5260325f | 307 | case oRSAAuthentication: |
308 | intptr = &options->rsa_authentication; | |
309 | goto parse_flag; | |
310 | ||
311 | case oRhostsRSAAuthentication: | |
312 | intptr = &options->rhosts_rsa_authentication; | |
313 | goto parse_flag; | |
314 | ||
315 | case oTISAuthentication: | |
316 | /* fallthrough, there is no difference on the client side */ | |
317 | case oSkeyAuthentication: | |
318 | intptr = &options->skey_authentication; | |
319 | goto parse_flag; | |
8efc0c15 | 320 | |
321 | #ifdef KRB4 | |
5260325f | 322 | case oKerberosAuthentication: |
323 | intptr = &options->kerberos_authentication; | |
324 | goto parse_flag; | |
8efc0c15 | 325 | #endif /* KRB4 */ |
326 | ||
327 | #ifdef AFS | |
5260325f | 328 | case oKerberosTgtPassing: |
329 | intptr = &options->kerberos_tgt_passing; | |
330 | goto parse_flag; | |
8efc0c15 | 331 | |
5260325f | 332 | case oAFSTokenPassing: |
333 | intptr = &options->afs_token_passing; | |
334 | goto parse_flag; | |
8efc0c15 | 335 | #endif |
5260325f | 336 | |
337 | case oFallBackToRsh: | |
338 | intptr = &options->fallback_to_rsh; | |
339 | goto parse_flag; | |
340 | ||
341 | case oUseRsh: | |
342 | intptr = &options->use_rsh; | |
343 | goto parse_flag; | |
344 | ||
345 | case oBatchMode: | |
346 | intptr = &options->batch_mode; | |
347 | goto parse_flag; | |
348 | ||
349 | case oCheckHostIP: | |
350 | intptr = &options->check_host_ip; | |
351 | goto parse_flag; | |
352 | ||
353 | case oStrictHostKeyChecking: | |
354 | intptr = &options->strict_host_key_checking; | |
704b1659 | 355 | arg = strdelim(&s); |
089fbbd2 | 356 | if (!arg || *arg == '\0') |
5260325f | 357 | fatal("%.200s line %d: Missing yes/no argument.", |
358 | filename, linenum); | |
359 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 360 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 361 | value = 1; |
089fbbd2 | 362 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 363 | value = 0; |
089fbbd2 | 364 | else if (strcmp(arg, "ask") == 0) |
5260325f | 365 | value = 2; |
366 | else | |
367 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
368 | if (*activep && *intptr == -1) | |
369 | *intptr = value; | |
370 | break; | |
371 | ||
372 | case oCompression: | |
373 | intptr = &options->compression; | |
374 | goto parse_flag; | |
375 | ||
376 | case oKeepAlives: | |
377 | intptr = &options->keepalives; | |
378 | goto parse_flag; | |
379 | ||
380 | case oNumberOfPasswordPrompts: | |
381 | intptr = &options->number_of_password_prompts; | |
382 | goto parse_int; | |
383 | ||
384 | case oCompressionLevel: | |
385 | intptr = &options->compression_level; | |
386 | goto parse_int; | |
387 | ||
388 | case oIdentityFile: | |
a306f2dd | 389 | case oIdentityFile2: |
704b1659 | 390 | arg = strdelim(&s); |
089fbbd2 | 391 | if (!arg || *arg == '\0') |
5260325f | 392 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
393 | if (*activep) { | |
a306f2dd | 394 | intptr = (opcode == oIdentityFile) ? |
395 | &options->num_identity_files : | |
396 | &options->num_identity_files2; | |
397 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
5260325f | 398 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
399 | filename, linenum, SSH_MAX_IDENTITY_FILES); | |
a306f2dd | 400 | charptr = (opcode == oIdentityFile) ? |
401 | &options->identity_files[*intptr] : | |
402 | &options->identity_files2[*intptr]; | |
089fbbd2 | 403 | *charptr = xstrdup(arg); |
a306f2dd | 404 | *intptr = *intptr + 1; |
5260325f | 405 | } |
406 | break; | |
407 | ||
fa649821 | 408 | case oXAuthLocation: |
409 | charptr=&options->xauth_location; | |
410 | goto parse_string; | |
411 | ||
5260325f | 412 | case oUser: |
413 | charptr = &options->user; | |
414 | parse_string: | |
704b1659 | 415 | arg = strdelim(&s); |
089fbbd2 | 416 | if (!arg || *arg == '\0') |
5260325f | 417 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
418 | if (*activep && *charptr == NULL) | |
089fbbd2 | 419 | *charptr = xstrdup(arg); |
5260325f | 420 | break; |
421 | ||
422 | case oGlobalKnownHostsFile: | |
423 | charptr = &options->system_hostfile; | |
424 | goto parse_string; | |
425 | ||
426 | case oUserKnownHostsFile: | |
427 | charptr = &options->user_hostfile; | |
428 | goto parse_string; | |
429 | ||
a306f2dd | 430 | case oGlobalKnownHostsFile2: |
431 | charptr = &options->system_hostfile2; | |
432 | goto parse_string; | |
433 | ||
434 | case oUserKnownHostsFile2: | |
435 | charptr = &options->user_hostfile2; | |
436 | goto parse_string; | |
437 | ||
5260325f | 438 | case oHostName: |
439 | charptr = &options->hostname; | |
440 | goto parse_string; | |
441 | ||
442 | case oProxyCommand: | |
443 | charptr = &options->proxy_command; | |
444 | string = xstrdup(""); | |
704b1659 | 445 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 446 | string = xrealloc(string, strlen(string) + strlen(arg) + 2); |
5260325f | 447 | strcat(string, " "); |
089fbbd2 | 448 | strcat(string, arg); |
5260325f | 449 | } |
450 | if (*activep && *charptr == NULL) | |
451 | *charptr = string; | |
452 | else | |
453 | xfree(string); | |
454 | return 0; | |
455 | ||
456 | case oPort: | |
457 | intptr = &options->port; | |
458 | parse_int: | |
704b1659 | 459 | arg = strdelim(&s); |
089fbbd2 | 460 | if (!arg || *arg == '\0') |
5260325f | 461 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 462 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 463 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 464 | |
465 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 466 | value = strtol(arg, &endofnumber, 0); |
467 | if (arg == endofnumber) | |
aa3378df | 468 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 469 | if (*activep && *intptr == -1) |
470 | *intptr = value; | |
471 | break; | |
472 | ||
473 | case oConnectionAttempts: | |
474 | intptr = &options->connection_attempts; | |
475 | goto parse_int; | |
476 | ||
477 | case oCipher: | |
478 | intptr = &options->cipher; | |
704b1659 | 479 | arg = strdelim(&s); |
089fbbd2 | 480 | if (!arg || *arg == '\0') |
71276795 | 481 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 482 | value = cipher_number(arg); |
5260325f | 483 | if (value == -1) |
484 | fatal("%.200s line %d: Bad cipher '%s'.", | |
089fbbd2 | 485 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 486 | if (*activep && *intptr == -1) |
487 | *intptr = value; | |
488 | break; | |
489 | ||
a8be9f80 | 490 | case oCiphers: |
704b1659 | 491 | arg = strdelim(&s); |
089fbbd2 | 492 | if (!arg || *arg == '\0') |
71276795 | 493 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 494 | if (!ciphers_valid(arg)) |
d0c832f3 | 495 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
089fbbd2 | 496 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 497 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 498 | options->ciphers = xstrdup(arg); |
a8be9f80 | 499 | break; |
500 | ||
501 | case oProtocol: | |
502 | intptr = &options->protocol; | |
704b1659 | 503 | arg = strdelim(&s); |
089fbbd2 | 504 | if (!arg || *arg == '\0') |
71276795 | 505 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 506 | value = proto_spec(arg); |
a8be9f80 | 507 | if (value == SSH_PROTO_UNKNOWN) |
508 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
089fbbd2 | 509 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 510 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
511 | *intptr = value; | |
512 | break; | |
513 | ||
5260325f | 514 | case oLogLevel: |
515 | intptr = (int *) &options->log_level; | |
704b1659 | 516 | arg = strdelim(&s); |
089fbbd2 | 517 | value = log_level_number(arg); |
5260325f | 518 | if (value == (LogLevel) - 1) |
519 | fatal("%.200s line %d: unsupported log level '%s'\n", | |
089fbbd2 | 520 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 521 | if (*activep && (LogLevel) * intptr == -1) |
522 | *intptr = (LogLevel) value; | |
523 | break; | |
524 | ||
525 | case oRemoteForward: | |
704b1659 | 526 | arg = strdelim(&s); |
089fbbd2 | 527 | if (!arg || *arg == '\0') |
5260325f | 528 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 529 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 530 | fatal("%.200s line %d: Badly formatted port number.", |
531 | filename, linenum); | |
089fbbd2 | 532 | fwd_port = atoi(arg); |
704b1659 | 533 | arg = strdelim(&s); |
089fbbd2 | 534 | if (!arg || *arg == '\0') |
5260325f | 535 | fatal("%.200s line %d: Missing second argument.", |
536 | filename, linenum); | |
089fbbd2 | 537 | if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
5260325f | 538 | fatal("%.200s line %d: Badly formatted host:port.", |
539 | filename, linenum); | |
540 | if (*activep) | |
541 | add_remote_forward(options, fwd_port, buf, fwd_host_port); | |
542 | break; | |
543 | ||
544 | case oLocalForward: | |
704b1659 | 545 | arg = strdelim(&s); |
089fbbd2 | 546 | if (!arg || *arg == '\0') |
5260325f | 547 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 548 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 549 | fatal("%.200s line %d: Badly formatted port number.", |
550 | filename, linenum); | |
089fbbd2 | 551 | fwd_port = atoi(arg); |
704b1659 | 552 | arg = strdelim(&s); |
089fbbd2 | 553 | if (!arg || *arg == '\0') |
5260325f | 554 | fatal("%.200s line %d: Missing second argument.", |
555 | filename, linenum); | |
089fbbd2 | 556 | if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
5260325f | 557 | fatal("%.200s line %d: Badly formatted host:port.", |
558 | filename, linenum); | |
559 | if (*activep) | |
560 | add_local_forward(options, fwd_port, buf, fwd_host_port); | |
561 | break; | |
562 | ||
563 | case oHost: | |
564 | *activep = 0; | |
704b1659 | 565 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 566 | if (match_pattern(host, arg)) { |
567 | debug("Applying options for %.100s", arg); | |
5260325f | 568 | *activep = 1; |
569 | break; | |
570 | } | |
704b1659 | 571 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 572 | return 0; |
573 | ||
574 | case oEscapeChar: | |
575 | intptr = &options->escape_char; | |
704b1659 | 576 | arg = strdelim(&s); |
089fbbd2 | 577 | if (!arg || *arg == '\0') |
5260325f | 578 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 579 | if (arg[0] == '^' && arg[2] == 0 && |
580 | (unsigned char) arg[1] >= 64 && (unsigned char) arg[1] < 128) | |
581 | value = (unsigned char) arg[1] & 31; | |
582 | else if (strlen(arg) == 1) | |
583 | value = (unsigned char) arg[0]; | |
584 | else if (strcmp(arg, "none") == 0) | |
5260325f | 585 | value = -2; |
586 | else { | |
587 | fatal("%.200s line %d: Bad escape character.", | |
588 | filename, linenum); | |
589 | /* NOTREACHED */ | |
590 | value = 0; /* Avoid compiler warning. */ | |
591 | } | |
592 | if (*activep && *intptr == -1) | |
593 | *intptr = value; | |
594 | break; | |
595 | ||
596 | default: | |
597 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
598 | } | |
599 | ||
600 | /* Check that there is no garbage at end of line. */ | |
704b1659 | 601 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 602 | { |
603 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
604 | filename, linenum, arg); | |
605 | } | |
5260325f | 606 | return 0; |
8efc0c15 | 607 | } |
608 | ||
609 | ||
aa3378df | 610 | /* |
611 | * Reads the config file and modifies the options accordingly. Options | |
612 | * should already be initialized before this call. This never returns if | |
613 | * there is an error. If the file does not exist, this returns immediately. | |
614 | */ | |
8efc0c15 | 615 | |
6ae2364d | 616 | void |
5260325f | 617 | read_config_file(const char *filename, const char *host, Options *options) |
8efc0c15 | 618 | { |
5260325f | 619 | FILE *f; |
620 | char line[1024]; | |
621 | int active, linenum; | |
622 | int bad_options = 0; | |
623 | ||
624 | /* Open the file. */ | |
625 | f = fopen(filename, "r"); | |
626 | if (!f) | |
627 | return; | |
628 | ||
629 | debug("Reading configuration data %.200s", filename); | |
630 | ||
aa3378df | 631 | /* |
632 | * Mark that we are now processing the options. This flag is turned | |
633 | * on/off by Host specifications. | |
634 | */ | |
5260325f | 635 | active = 1; |
636 | linenum = 0; | |
637 | while (fgets(line, sizeof(line), f)) { | |
638 | /* Update line number counter. */ | |
639 | linenum++; | |
640 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
641 | bad_options++; | |
642 | } | |
643 | fclose(f); | |
644 | if (bad_options > 0) | |
645 | fatal("%s: terminating, %d bad configuration options\n", | |
646 | filename, bad_options); | |
8efc0c15 | 647 | } |
648 | ||
aa3378df | 649 | /* |
650 | * Initializes options to special values that indicate that they have not yet | |
651 | * been set. Read_config_file will only set options with this value. Options | |
652 | * are processed in the following order: command line, user config file, | |
653 | * system config file. Last, fill_default_options is called. | |
654 | */ | |
8efc0c15 | 655 | |
6ae2364d | 656 | void |
5260325f | 657 | initialize_options(Options * options) |
8efc0c15 | 658 | { |
5260325f | 659 | memset(options, 'X', sizeof(*options)); |
660 | options->forward_agent = -1; | |
661 | options->forward_x11 = -1; | |
fa649821 | 662 | options->xauth_location = NULL; |
5260325f | 663 | options->gateway_ports = -1; |
664 | options->use_privileged_port = -1; | |
665 | options->rhosts_authentication = -1; | |
666 | options->rsa_authentication = -1; | |
1d1ffb87 | 667 | options->dsa_authentication = -1; |
5260325f | 668 | options->skey_authentication = -1; |
8efc0c15 | 669 | #ifdef KRB4 |
5260325f | 670 | options->kerberos_authentication = -1; |
8efc0c15 | 671 | #endif |
672 | #ifdef AFS | |
5260325f | 673 | options->kerberos_tgt_passing = -1; |
674 | options->afs_token_passing = -1; | |
8efc0c15 | 675 | #endif |
5260325f | 676 | options->password_authentication = -1; |
94ec8c6b | 677 | options->kbd_interactive_authentication = -1; |
678 | options->kbd_interactive_devices = NULL; | |
5260325f | 679 | options->rhosts_rsa_authentication = -1; |
680 | options->fallback_to_rsh = -1; | |
681 | options->use_rsh = -1; | |
682 | options->batch_mode = -1; | |
683 | options->check_host_ip = -1; | |
684 | options->strict_host_key_checking = -1; | |
685 | options->compression = -1; | |
686 | options->keepalives = -1; | |
687 | options->compression_level = -1; | |
688 | options->port = -1; | |
689 | options->connection_attempts = -1; | |
690 | options->number_of_password_prompts = -1; | |
691 | options->cipher = -1; | |
a8be9f80 | 692 | options->ciphers = NULL; |
693 | options->protocol = SSH_PROTO_UNKNOWN; | |
5260325f | 694 | options->num_identity_files = 0; |
a306f2dd | 695 | options->num_identity_files2 = 0; |
5260325f | 696 | options->hostname = NULL; |
697 | options->proxy_command = NULL; | |
698 | options->user = NULL; | |
699 | options->escape_char = -1; | |
700 | options->system_hostfile = NULL; | |
701 | options->user_hostfile = NULL; | |
a306f2dd | 702 | options->system_hostfile2 = NULL; |
703 | options->user_hostfile2 = NULL; | |
5260325f | 704 | options->num_local_forwards = 0; |
705 | options->num_remote_forwards = 0; | |
706 | options->log_level = (LogLevel) - 1; | |
8efc0c15 | 707 | } |
708 | ||
aa3378df | 709 | /* |
710 | * Called after processing other sources of option data, this fills those | |
711 | * options for which no value has been specified with their default values. | |
712 | */ | |
8efc0c15 | 713 | |
6ae2364d | 714 | void |
5260325f | 715 | fill_default_options(Options * options) |
8efc0c15 | 716 | { |
5260325f | 717 | if (options->forward_agent == -1) |
71276795 | 718 | options->forward_agent = 0; |
5260325f | 719 | if (options->forward_x11 == -1) |
c8d54615 | 720 | options->forward_x11 = 0; |
fa649821 | 721 | #ifdef XAUTH_PATH |
722 | if (options->xauth_location == NULL) | |
723 | options->xauth_location = XAUTH_PATH; | |
724 | #endif /* XAUTH_PATH */ | |
5260325f | 725 | if (options->gateway_ports == -1) |
726 | options->gateway_ports = 0; | |
727 | if (options->use_privileged_port == -1) | |
728 | options->use_privileged_port = 1; | |
729 | if (options->rhosts_authentication == -1) | |
730 | options->rhosts_authentication = 1; | |
731 | if (options->rsa_authentication == -1) | |
732 | options->rsa_authentication = 1; | |
1d1ffb87 | 733 | if (options->dsa_authentication == -1) |
734 | options->dsa_authentication = 1; | |
5260325f | 735 | if (options->skey_authentication == -1) |
736 | options->skey_authentication = 0; | |
8efc0c15 | 737 | #ifdef KRB4 |
5260325f | 738 | if (options->kerberos_authentication == -1) |
739 | options->kerberos_authentication = 1; | |
8efc0c15 | 740 | #endif /* KRB4 */ |
741 | #ifdef AFS | |
5260325f | 742 | if (options->kerberos_tgt_passing == -1) |
743 | options->kerberos_tgt_passing = 1; | |
744 | if (options->afs_token_passing == -1) | |
745 | options->afs_token_passing = 1; | |
8efc0c15 | 746 | #endif /* AFS */ |
5260325f | 747 | if (options->password_authentication == -1) |
748 | options->password_authentication = 1; | |
94ec8c6b | 749 | if (options->kbd_interactive_authentication == -1) |
750 | options->kbd_interactive_authentication = 0; | |
5260325f | 751 | if (options->rhosts_rsa_authentication == -1) |
752 | options->rhosts_rsa_authentication = 1; | |
753 | if (options->fallback_to_rsh == -1) | |
3f7a7e4a | 754 | options->fallback_to_rsh = 0; |
5260325f | 755 | if (options->use_rsh == -1) |
756 | options->use_rsh = 0; | |
757 | if (options->batch_mode == -1) | |
758 | options->batch_mode = 0; | |
759 | if (options->check_host_ip == -1) | |
760 | options->check_host_ip = 1; | |
761 | if (options->strict_host_key_checking == -1) | |
762 | options->strict_host_key_checking = 2; /* 2 is default */ | |
763 | if (options->compression == -1) | |
764 | options->compression = 0; | |
765 | if (options->keepalives == -1) | |
766 | options->keepalives = 1; | |
767 | if (options->compression_level == -1) | |
768 | options->compression_level = 6; | |
769 | if (options->port == -1) | |
770 | options->port = 0; /* Filled in ssh_connect. */ | |
771 | if (options->connection_attempts == -1) | |
772 | options->connection_attempts = 4; | |
773 | if (options->number_of_password_prompts == -1) | |
774 | options->number_of_password_prompts = 3; | |
775 | /* Selected in ssh_login(). */ | |
776 | if (options->cipher == -1) | |
777 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 778 | /* options->ciphers, default set in myproposals.h */ |
a8be9f80 | 779 | if (options->protocol == SSH_PROTO_UNKNOWN) |
a306f2dd | 780 | options->protocol = SSH_PROTO_1|SSH_PROTO_2|SSH_PROTO_1_PREFERRED; |
5260325f | 781 | if (options->num_identity_files == 0) { |
782 | options->identity_files[0] = | |
783 | xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1); | |
784 | sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY); | |
785 | options->num_identity_files = 1; | |
786 | } | |
a306f2dd | 787 | if (options->num_identity_files2 == 0) { |
788 | options->identity_files2[0] = | |
1d1ffb87 | 789 | xmalloc(2 + strlen(SSH_CLIENT_ID_DSA) + 1); |
790 | sprintf(options->identity_files2[0], "~/%.100s", SSH_CLIENT_ID_DSA); | |
a306f2dd | 791 | options->num_identity_files2 = 1; |
792 | } | |
5260325f | 793 | if (options->escape_char == -1) |
794 | options->escape_char = '~'; | |
795 | if (options->system_hostfile == NULL) | |
796 | options->system_hostfile = SSH_SYSTEM_HOSTFILE; | |
797 | if (options->user_hostfile == NULL) | |
798 | options->user_hostfile = SSH_USER_HOSTFILE; | |
a306f2dd | 799 | if (options->system_hostfile2 == NULL) |
800 | options->system_hostfile2 = SSH_SYSTEM_HOSTFILE2; | |
801 | if (options->user_hostfile2 == NULL) | |
802 | options->user_hostfile2 = SSH_USER_HOSTFILE2; | |
5260325f | 803 | if (options->log_level == (LogLevel) - 1) |
804 | options->log_level = SYSLOG_LEVEL_INFO; | |
805 | /* options->proxy_command should not be set by default */ | |
806 | /* options->user will be set in the main program if appropriate */ | |
807 | /* options->hostname will be set in the main program if appropriate */ | |
8efc0c15 | 808 | } |