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3c0ef626 | 1 | /* |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * Functions for reading the configuration files. | |
6 | * | |
7 | * As far as I am concerned, the code I have written for this software | |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
12 | */ | |
13 | ||
14 | #include "includes.h" | |
2ce0bfe4 | 15 | RCSID("$OpenBSD: readconf.c,v 1.143 2005/07/30 02:03:47 djm Exp $"); |
3c0ef626 | 16 | |
17 | #include "ssh.h" | |
18 | #include "xmalloc.h" | |
19 | #include "compat.h" | |
20 | #include "cipher.h" | |
21 | #include "pathnames.h" | |
22 | #include "log.h" | |
23 | #include "readconf.h" | |
24 | #include "match.h" | |
25 | #include "misc.h" | |
26 | #include "kex.h" | |
27 | #include "mac.h" | |
28 | ||
29 | /* Format of the configuration file: | |
30 | ||
31 | # Configuration data is parsed as follows: | |
32 | # 1. command line options | |
33 | # 2. user-specific file | |
34 | # 3. system-wide file | |
35 | # Any configuration value is only changed the first time it is set. | |
36 | # Thus, host-specific definitions should be at the beginning of the | |
37 | # configuration file, and defaults at the end. | |
38 | ||
39 | # Host-specific declarations. These may override anything above. A single | |
40 | # host may match multiple declarations; these are processed in the order | |
41 | # that they are given in. | |
42 | ||
43 | Host *.ngs.fi ngs.fi | |
44a053a3 | 44 | User foo |
3c0ef626 | 45 | |
46 | Host fake.com | |
47 | HostName another.host.name.real.org | |
48 | User blaah | |
49 | Port 34289 | |
50 | ForwardX11 no | |
51 | ForwardAgent no | |
52 | ||
53 | Host books.com | |
54 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
55 | Cipher 3des | |
56 | ||
57 | Host fascist.blob.com | |
58 | Port 23123 | |
59 | User tylonen | |
3c0ef626 | 60 | PasswordAuthentication no |
61 | ||
62 | Host puukko.hut.fi | |
63 | User t35124p | |
64 | ProxyCommand ssh-proxy %h %p | |
65 | ||
66 | Host *.fr | |
44a053a3 | 67 | PublicKeyAuthentication no |
3c0ef626 | 68 | |
69 | Host *.su | |
70 | Cipher none | |
71 | PasswordAuthentication no | |
72 | ||
73 | # Defaults for various options | |
74 | Host * | |
75 | ForwardAgent no | |
76 | ForwardX11 no | |
3c0ef626 | 77 | PasswordAuthentication yes |
78 | RSAAuthentication yes | |
79 | RhostsRSAAuthentication yes | |
3c0ef626 | 80 | StrictHostKeyChecking yes |
540d72c3 | 81 | TcpKeepAlive no |
3c0ef626 | 82 | IdentityFile ~/.ssh/identity |
83 | Port 22 | |
84 | EscapeChar ~ | |
85 | ||
86 | */ | |
87 | ||
88 | /* Keyword tokens. */ | |
89 | ||
90 | typedef enum { | |
91 | oBadOption, | |
540d72c3 | 92 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
44a053a3 | 93 | oPasswordAuthentication, oRSAAuthentication, |
3c0ef626 | 94 | oChallengeResponseAuthentication, oXAuthLocation, |
3c0ef626 | 95 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
96 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
97 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
98 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
540d72c3 | 99 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
3c0ef626 | 100 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
101 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, | |
102 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, | |
103 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, | |
104 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, | |
44a053a3 | 105 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
7cac2b65 | 106 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
107 | oAddressFamily, oGssAuthentication, oGssKeyEx, oGssDelegateCreds, | |
12a403af | 108 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
dfddba3d | 109 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
7cac2b65 | 110 | oDeprecated, oUnsupported |
3c0ef626 | 111 | } OpCodes; |
112 | ||
113 | /* Textual representations of the tokens. */ | |
114 | ||
115 | static struct { | |
116 | const char *name; | |
117 | OpCodes opcode; | |
118 | } keywords[] = { | |
119 | { "forwardagent", oForwardAgent }, | |
120 | { "forwardx11", oForwardX11 }, | |
540d72c3 | 121 | { "forwardx11trusted", oForwardX11Trusted }, |
3c0ef626 | 122 | { "xauthlocation", oXAuthLocation }, |
123 | { "gatewayports", oGatewayPorts }, | |
124 | { "useprivilegedport", oUsePrivilegedPort }, | |
7cac2b65 | 125 | { "rhostsauthentication", oDeprecated }, |
3c0ef626 | 126 | { "passwordauthentication", oPasswordAuthentication }, |
127 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, | |
128 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
129 | { "rsaauthentication", oRSAAuthentication }, | |
130 | { "pubkeyauthentication", oPubkeyAuthentication }, | |
131 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ | |
132 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
133 | { "hostbasedauthentication", oHostbasedAuthentication }, | |
134 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, | |
135 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
136 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
7cac2b65 | 137 | { "kerberosauthentication", oUnsupported }, |
138 | { "kerberostgtpassing", oUnsupported }, | |
139 | { "afstokenpassing", oUnsupported }, | |
140 | #if defined(GSSAPI) | |
5598e598 | 141 | { "gssapiauthentication", oGssAuthentication }, |
7a056ed1 | 142 | { "gssapikeyexchange", oGssKeyEx }, |
5598e598 | 143 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
7cac2b65 | 144 | #else |
145 | { "gssapiauthentication", oUnsupported }, | |
146 | { "gssapikeyexchange", oUnsupported }, | |
147 | { "gssapidelegatecredentials", oUnsupported }, | |
3c0ef626 | 148 | #endif |
44a053a3 | 149 | { "fallbacktorsh", oDeprecated }, |
150 | { "usersh", oDeprecated }, | |
3c0ef626 | 151 | { "identityfile", oIdentityFile }, |
152 | { "identityfile2", oIdentityFile }, /* alias */ | |
12a403af | 153 | { "identitiesonly", oIdentitiesOnly }, |
3c0ef626 | 154 | { "hostname", oHostName }, |
155 | { "hostkeyalias", oHostKeyAlias }, | |
156 | { "proxycommand", oProxyCommand }, | |
157 | { "port", oPort }, | |
158 | { "cipher", oCipher }, | |
159 | { "ciphers", oCiphers }, | |
160 | { "macs", oMacs }, | |
161 | { "protocol", oProtocol }, | |
162 | { "remoteforward", oRemoteForward }, | |
163 | { "localforward", oLocalForward }, | |
164 | { "user", oUser }, | |
165 | { "host", oHost }, | |
166 | { "escapechar", oEscapeChar }, | |
167 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
168 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ | |
169 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, | |
170 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ | |
171 | { "connectionattempts", oConnectionAttempts }, | |
172 | { "batchmode", oBatchMode }, | |
173 | { "checkhostip", oCheckHostIP }, | |
174 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
175 | { "compression", oCompression }, | |
176 | { "compressionlevel", oCompressionLevel }, | |
540d72c3 | 177 | { "tcpkeepalive", oTCPKeepAlive }, |
178 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
3c0ef626 | 179 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
180 | { "loglevel", oLogLevel }, | |
181 | { "dynamicforward", oDynamicForward }, | |
182 | { "preferredauthentications", oPreferredAuthentications }, | |
183 | { "hostkeyalgorithms", oHostKeyAlgorithms }, | |
184 | { "bindaddress", oBindAddress }, | |
7cac2b65 | 185 | #ifdef SMARTCARD |
3c0ef626 | 186 | { "smartcarddevice", oSmartcardDevice }, |
7cac2b65 | 187 | #else |
188 | { "smartcarddevice", oUnsupported }, | |
189 | #endif | |
e9702f7d | 190 | { "clearallforwardings", oClearAllForwardings }, |
bfe49944 | 191 | { "enablesshkeysign", oEnableSSHKeysign }, |
7cac2b65 | 192 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
e9702f7d | 193 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
7cac2b65 | 194 | { "rekeylimit", oRekeyLimit }, |
195 | { "connecttimeout", oConnectTimeout }, | |
196 | { "addressfamily", oAddressFamily }, | |
540d72c3 | 197 | { "serveraliveinterval", oServerAliveInterval }, |
198 | { "serveralivecountmax", oServerAliveCountMax }, | |
7e82606e | 199 | { "sendenv", oSendEnv }, |
200 | { "controlpath", oControlPath }, | |
201 | { "controlmaster", oControlMaster }, | |
dfddba3d | 202 | { "hashknownhosts", oHashKnownHosts }, |
e9702f7d | 203 | { NULL, oBadOption } |
3c0ef626 | 204 | }; |
205 | ||
206 | /* | |
207 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
208 | * error. | |
209 | */ | |
210 | ||
211 | void | |
dfddba3d | 212 | add_local_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 213 | { |
214 | Forward *fwd; | |
d03f4262 | 215 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
3c0ef626 | 216 | extern uid_t original_real_uid; |
dfddba3d | 217 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
3c0ef626 | 218 | fatal("Privileged ports can only be forwarded by root."); |
219 | #endif | |
220 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
221 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
222 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
dfddba3d | 223 | |
224 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
225 | NULL : xstrdup(newfwd->listen_host); | |
226 | fwd->listen_port = newfwd->listen_port; | |
227 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
228 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 229 | } |
230 | ||
231 | /* | |
232 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
233 | * an error. | |
234 | */ | |
235 | ||
236 | void | |
dfddba3d | 237 | add_remote_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 238 | { |
239 | Forward *fwd; | |
240 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
241 | fatal("Too many remote forwards (max %d).", | |
e9702f7d | 242 | SSH_MAX_FORWARDS_PER_DIRECTION); |
3c0ef626 | 243 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
dfddba3d | 244 | |
245 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
246 | NULL : xstrdup(newfwd->listen_host); | |
247 | fwd->listen_port = newfwd->listen_port; | |
248 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
249 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 250 | } |
251 | ||
252 | static void | |
253 | clear_forwardings(Options *options) | |
254 | { | |
255 | int i; | |
256 | ||
dfddba3d | 257 | for (i = 0; i < options->num_local_forwards; i++) { |
8b32eddc | 258 | if (options->local_forwards[i].listen_host != NULL) |
259 | xfree(options->local_forwards[i].listen_host); | |
dfddba3d | 260 | xfree(options->local_forwards[i].connect_host); |
261 | } | |
3c0ef626 | 262 | options->num_local_forwards = 0; |
dfddba3d | 263 | for (i = 0; i < options->num_remote_forwards; i++) { |
8b32eddc | 264 | if (options->remote_forwards[i].listen_host != NULL) |
265 | xfree(options->remote_forwards[i].listen_host); | |
dfddba3d | 266 | xfree(options->remote_forwards[i].connect_host); |
267 | } | |
3c0ef626 | 268 | options->num_remote_forwards = 0; |
269 | } | |
270 | ||
271 | /* | |
272 | * Returns the number of the token pointed to by cp or oBadOption. | |
273 | */ | |
274 | ||
275 | static OpCodes | |
276 | parse_token(const char *cp, const char *filename, int linenum) | |
277 | { | |
278 | u_int i; | |
279 | ||
280 | for (i = 0; keywords[i].name; i++) | |
281 | if (strcasecmp(cp, keywords[i].name) == 0) | |
282 | return keywords[i].opcode; | |
283 | ||
284 | error("%s: line %d: Bad configuration option: %s", | |
285 | filename, linenum, cp); | |
286 | return oBadOption; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Processes a single option line as used in the configuration files. This | |
291 | * only sets those values that have not already been set. | |
292 | */ | |
bfe49944 | 293 | #define WHITESPACE " \t\r\n" |
3c0ef626 | 294 | |
295 | int | |
296 | process_config_line(Options *options, const char *host, | |
297 | char *line, const char *filename, int linenum, | |
298 | int *activep) | |
299 | { | |
dfddba3d | 300 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
3c0ef626 | 301 | int opcode, *intptr, value; |
bfe49944 | 302 | size_t len; |
dfddba3d | 303 | Forward fwd; |
3c0ef626 | 304 | |
7cac2b65 | 305 | /* Strip trailing whitespace */ |
8b32eddc | 306 | for (len = strlen(line) - 1; len > 0; len--) { |
7cac2b65 | 307 | if (strchr(WHITESPACE, line[len]) == NULL) |
308 | break; | |
309 | line[len] = '\0'; | |
310 | } | |
311 | ||
3c0ef626 | 312 | s = line; |
313 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
314 | keyword = strdelim(&s); | |
315 | /* Ignore leading whitespace. */ | |
316 | if (*keyword == '\0') | |
317 | keyword = strdelim(&s); | |
318 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') | |
319 | return 0; | |
320 | ||
321 | opcode = parse_token(keyword, filename, linenum); | |
322 | ||
323 | switch (opcode) { | |
324 | case oBadOption: | |
325 | /* don't panic, but count bad options */ | |
326 | return -1; | |
327 | /* NOTREACHED */ | |
7cac2b65 | 328 | case oConnectTimeout: |
329 | intptr = &options->connection_timeout; | |
540d72c3 | 330 | parse_time: |
7cac2b65 | 331 | arg = strdelim(&s); |
332 | if (!arg || *arg == '\0') | |
333 | fatal("%s line %d: missing time value.", | |
334 | filename, linenum); | |
335 | if ((value = convtime(arg)) == -1) | |
336 | fatal("%s line %d: invalid time value.", | |
337 | filename, linenum); | |
338 | if (*intptr == -1) | |
339 | *intptr = value; | |
340 | break; | |
341 | ||
3c0ef626 | 342 | case oForwardAgent: |
343 | intptr = &options->forward_agent; | |
344 | parse_flag: | |
345 | arg = strdelim(&s); | |
346 | if (!arg || *arg == '\0') | |
347 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
348 | value = 0; /* To avoid compiler warning... */ | |
349 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
350 | value = 1; | |
351 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
352 | value = 0; | |
353 | else | |
354 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
355 | if (*activep && *intptr == -1) | |
356 | *intptr = value; | |
357 | break; | |
358 | ||
359 | case oForwardX11: | |
360 | intptr = &options->forward_x11; | |
361 | goto parse_flag; | |
362 | ||
540d72c3 | 363 | case oForwardX11Trusted: |
364 | intptr = &options->forward_x11_trusted; | |
365 | goto parse_flag; | |
366 | ||
3c0ef626 | 367 | case oGatewayPorts: |
368 | intptr = &options->gateway_ports; | |
369 | goto parse_flag; | |
370 | ||
371 | case oUsePrivilegedPort: | |
372 | intptr = &options->use_privileged_port; | |
373 | goto parse_flag; | |
374 | ||
3c0ef626 | 375 | case oPasswordAuthentication: |
376 | intptr = &options->password_authentication; | |
377 | goto parse_flag; | |
378 | ||
379 | case oKbdInteractiveAuthentication: | |
380 | intptr = &options->kbd_interactive_authentication; | |
381 | goto parse_flag; | |
382 | ||
383 | case oKbdInteractiveDevices: | |
384 | charptr = &options->kbd_interactive_devices; | |
385 | goto parse_string; | |
386 | ||
387 | case oPubkeyAuthentication: | |
388 | intptr = &options->pubkey_authentication; | |
389 | goto parse_flag; | |
390 | ||
391 | case oRSAAuthentication: | |
392 | intptr = &options->rsa_authentication; | |
393 | goto parse_flag; | |
394 | ||
395 | case oRhostsRSAAuthentication: | |
396 | intptr = &options->rhosts_rsa_authentication; | |
397 | goto parse_flag; | |
398 | ||
399 | case oHostbasedAuthentication: | |
400 | intptr = &options->hostbased_authentication; | |
401 | goto parse_flag; | |
402 | ||
403 | case oChallengeResponseAuthentication: | |
404 | intptr = &options->challenge_response_authentication; | |
405 | goto parse_flag; | |
7cac2b65 | 406 | |
5598e598 | 407 | case oGssAuthentication: |
408 | intptr = &options->gss_authentication; | |
409 | goto parse_flag; | |
7cac2b65 | 410 | |
7a056ed1 | 411 | case oGssKeyEx: |
412 | intptr = &options->gss_keyex; | |
413 | goto parse_flag; | |
414 | ||
5598e598 | 415 | case oGssDelegateCreds: |
416 | intptr = &options->gss_deleg_creds; | |
417 | goto parse_flag; | |
5598e598 | 418 | |
3c0ef626 | 419 | case oBatchMode: |
420 | intptr = &options->batch_mode; | |
421 | goto parse_flag; | |
422 | ||
423 | case oCheckHostIP: | |
424 | intptr = &options->check_host_ip; | |
425 | goto parse_flag; | |
426 | ||
7cac2b65 | 427 | case oVerifyHostKeyDNS: |
428 | intptr = &options->verify_host_key_dns; | |
540d72c3 | 429 | goto parse_yesnoask; |
7cac2b65 | 430 | |
3c0ef626 | 431 | case oStrictHostKeyChecking: |
432 | intptr = &options->strict_host_key_checking; | |
540d72c3 | 433 | parse_yesnoask: |
3c0ef626 | 434 | arg = strdelim(&s); |
435 | if (!arg || *arg == '\0') | |
436 | fatal("%.200s line %d: Missing yes/no/ask argument.", | |
e9702f7d | 437 | filename, linenum); |
3c0ef626 | 438 | value = 0; /* To avoid compiler warning... */ |
439 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
440 | value = 1; | |
441 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
442 | value = 0; | |
443 | else if (strcmp(arg, "ask") == 0) | |
444 | value = 2; | |
445 | else | |
446 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
447 | if (*activep && *intptr == -1) | |
448 | *intptr = value; | |
449 | break; | |
450 | ||
451 | case oCompression: | |
452 | intptr = &options->compression; | |
453 | goto parse_flag; | |
454 | ||
540d72c3 | 455 | case oTCPKeepAlive: |
456 | intptr = &options->tcp_keep_alive; | |
3c0ef626 | 457 | goto parse_flag; |
458 | ||
459 | case oNoHostAuthenticationForLocalhost: | |
460 | intptr = &options->no_host_authentication_for_localhost; | |
461 | goto parse_flag; | |
462 | ||
463 | case oNumberOfPasswordPrompts: | |
464 | intptr = &options->number_of_password_prompts; | |
465 | goto parse_int; | |
466 | ||
467 | case oCompressionLevel: | |
468 | intptr = &options->compression_level; | |
469 | goto parse_int; | |
470 | ||
7cac2b65 | 471 | case oRekeyLimit: |
472 | intptr = &options->rekey_limit; | |
473 | arg = strdelim(&s); | |
474 | if (!arg || *arg == '\0') | |
475 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
476 | if (arg[0] < '0' || arg[0] > '9') | |
477 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
478 | value = strtol(arg, &endofnumber, 10); | |
479 | if (arg == endofnumber) | |
480 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
481 | switch (toupper(*endofnumber)) { | |
482 | case 'K': | |
483 | value *= 1<<10; | |
484 | break; | |
485 | case 'M': | |
486 | value *= 1<<20; | |
487 | break; | |
488 | case 'G': | |
489 | value *= 1<<30; | |
490 | break; | |
491 | } | |
492 | if (*activep && *intptr == -1) | |
493 | *intptr = value; | |
494 | break; | |
495 | ||
3c0ef626 | 496 | case oIdentityFile: |
497 | arg = strdelim(&s); | |
498 | if (!arg || *arg == '\0') | |
499 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
500 | if (*activep) { | |
501 | intptr = &options->num_identity_files; | |
502 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
503 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
e9702f7d | 504 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
3c0ef626 | 505 | charptr = &options->identity_files[*intptr]; |
506 | *charptr = xstrdup(arg); | |
507 | *intptr = *intptr + 1; | |
508 | } | |
509 | break; | |
510 | ||
511 | case oXAuthLocation: | |
512 | charptr=&options->xauth_location; | |
513 | goto parse_string; | |
514 | ||
515 | case oUser: | |
516 | charptr = &options->user; | |
517 | parse_string: | |
518 | arg = strdelim(&s); | |
519 | if (!arg || *arg == '\0') | |
520 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
521 | if (*activep && *charptr == NULL) | |
522 | *charptr = xstrdup(arg); | |
523 | break; | |
524 | ||
525 | case oGlobalKnownHostsFile: | |
526 | charptr = &options->system_hostfile; | |
527 | goto parse_string; | |
528 | ||
529 | case oUserKnownHostsFile: | |
530 | charptr = &options->user_hostfile; | |
531 | goto parse_string; | |
532 | ||
533 | case oGlobalKnownHostsFile2: | |
534 | charptr = &options->system_hostfile2; | |
535 | goto parse_string; | |
536 | ||
537 | case oUserKnownHostsFile2: | |
538 | charptr = &options->user_hostfile2; | |
539 | goto parse_string; | |
540 | ||
541 | case oHostName: | |
542 | charptr = &options->hostname; | |
543 | goto parse_string; | |
544 | ||
545 | case oHostKeyAlias: | |
546 | charptr = &options->host_key_alias; | |
547 | goto parse_string; | |
548 | ||
549 | case oPreferredAuthentications: | |
550 | charptr = &options->preferred_authentications; | |
551 | goto parse_string; | |
552 | ||
553 | case oBindAddress: | |
554 | charptr = &options->bind_address; | |
555 | goto parse_string; | |
556 | ||
557 | case oSmartcardDevice: | |
558 | charptr = &options->smartcard_device; | |
559 | goto parse_string; | |
560 | ||
561 | case oProxyCommand: | |
7cac2b65 | 562 | if (s == NULL) |
563 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
3c0ef626 | 564 | charptr = &options->proxy_command; |
bfe49944 | 565 | len = strspn(s, WHITESPACE "="); |
3c0ef626 | 566 | if (*activep && *charptr == NULL) |
bfe49944 | 567 | *charptr = xstrdup(s + len); |
3c0ef626 | 568 | return 0; |
569 | ||
570 | case oPort: | |
571 | intptr = &options->port; | |
572 | parse_int: | |
573 | arg = strdelim(&s); | |
574 | if (!arg || *arg == '\0') | |
575 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
576 | if (arg[0] < '0' || arg[0] > '9') | |
577 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
578 | ||
579 | /* Octal, decimal, or hex format? */ | |
580 | value = strtol(arg, &endofnumber, 0); | |
581 | if (arg == endofnumber) | |
582 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
583 | if (*activep && *intptr == -1) | |
584 | *intptr = value; | |
585 | break; | |
586 | ||
587 | case oConnectionAttempts: | |
588 | intptr = &options->connection_attempts; | |
589 | goto parse_int; | |
590 | ||
591 | case oCipher: | |
592 | intptr = &options->cipher; | |
593 | arg = strdelim(&s); | |
594 | if (!arg || *arg == '\0') | |
595 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
596 | value = cipher_number(arg); | |
597 | if (value == -1) | |
598 | fatal("%.200s line %d: Bad cipher '%s'.", | |
e9702f7d | 599 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 600 | if (*activep && *intptr == -1) |
601 | *intptr = value; | |
602 | break; | |
603 | ||
604 | case oCiphers: | |
605 | arg = strdelim(&s); | |
606 | if (!arg || *arg == '\0') | |
607 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
608 | if (!ciphers_valid(arg)) | |
609 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", | |
e9702f7d | 610 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 611 | if (*activep && options->ciphers == NULL) |
612 | options->ciphers = xstrdup(arg); | |
613 | break; | |
614 | ||
615 | case oMacs: | |
616 | arg = strdelim(&s); | |
617 | if (!arg || *arg == '\0') | |
618 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
619 | if (!mac_valid(arg)) | |
620 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
e9702f7d | 621 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 622 | if (*activep && options->macs == NULL) |
623 | options->macs = xstrdup(arg); | |
624 | break; | |
625 | ||
626 | case oHostKeyAlgorithms: | |
627 | arg = strdelim(&s); | |
628 | if (!arg || *arg == '\0') | |
629 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
630 | if (!key_names_valid2(arg)) | |
631 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
e9702f7d | 632 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 633 | if (*activep && options->hostkeyalgorithms == NULL) |
634 | options->hostkeyalgorithms = xstrdup(arg); | |
635 | break; | |
636 | ||
637 | case oProtocol: | |
638 | intptr = &options->protocol; | |
639 | arg = strdelim(&s); | |
640 | if (!arg || *arg == '\0') | |
641 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
642 | value = proto_spec(arg); | |
643 | if (value == SSH_PROTO_UNKNOWN) | |
644 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
e9702f7d | 645 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 646 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
647 | *intptr = value; | |
648 | break; | |
649 | ||
650 | case oLogLevel: | |
651 | intptr = (int *) &options->log_level; | |
652 | arg = strdelim(&s); | |
653 | value = log_level_number(arg); | |
e9702f7d | 654 | if (value == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 655 | fatal("%.200s line %d: unsupported log level '%s'", |
e9702f7d | 656 | filename, linenum, arg ? arg : "<NONE>"); |
657 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) | |
3c0ef626 | 658 | *intptr = (LogLevel) value; |
659 | break; | |
660 | ||
661 | case oLocalForward: | |
662 | case oRemoteForward: | |
663 | arg = strdelim(&s); | |
dfddba3d | 664 | if (arg == NULL || *arg == '\0') |
3c0ef626 | 665 | fatal("%.200s line %d: Missing port argument.", |
666 | filename, linenum); | |
dfddba3d | 667 | arg2 = strdelim(&s); |
668 | if (arg2 == NULL || *arg2 == '\0') | |
669 | fatal("%.200s line %d: Missing target argument.", | |
3c0ef626 | 670 | filename, linenum); |
dfddba3d | 671 | |
672 | /* construct a string for parse_forward */ | |
673 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
674 | ||
675 | if (parse_forward(&fwd, fwdarg) == 0) | |
3c0ef626 | 676 | fatal("%.200s line %d: Bad forwarding specification.", |
677 | filename, linenum); | |
dfddba3d | 678 | |
3c0ef626 | 679 | if (*activep) { |
680 | if (opcode == oLocalForward) | |
dfddba3d | 681 | add_local_forward(options, &fwd); |
3c0ef626 | 682 | else if (opcode == oRemoteForward) |
dfddba3d | 683 | add_remote_forward(options, &fwd); |
3c0ef626 | 684 | } |
685 | break; | |
686 | ||
687 | case oDynamicForward: | |
688 | arg = strdelim(&s); | |
689 | if (!arg || *arg == '\0') | |
690 | fatal("%.200s line %d: Missing port argument.", | |
691 | filename, linenum); | |
dfddba3d | 692 | memset(&fwd, '\0', sizeof(fwd)); |
693 | fwd.connect_host = "socks"; | |
694 | fwd.listen_host = hpdelim(&arg); | |
695 | if (fwd.listen_host == NULL || | |
696 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
697 | fatal("%.200s line %d: Bad forwarding specification.", | |
698 | filename, linenum); | |
699 | if (arg) { | |
700 | fwd.listen_port = a2port(arg); | |
701 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
702 | } else { | |
703 | fwd.listen_port = a2port(fwd.listen_host); | |
2ce0bfe4 | 704 | fwd.listen_host = NULL; |
dfddba3d | 705 | } |
706 | if (fwd.listen_port == 0) | |
3c0ef626 | 707 | fatal("%.200s line %d: Badly formatted port number.", |
708 | filename, linenum); | |
709 | if (*activep) | |
dfddba3d | 710 | add_local_forward(options, &fwd); |
3c0ef626 | 711 | break; |
712 | ||
713 | case oClearAllForwardings: | |
714 | intptr = &options->clear_forwardings; | |
715 | goto parse_flag; | |
716 | ||
717 | case oHost: | |
718 | *activep = 0; | |
719 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') | |
720 | if (match_pattern(host, arg)) { | |
721 | debug("Applying options for %.100s", arg); | |
722 | *activep = 1; | |
723 | break; | |
724 | } | |
725 | /* Avoid garbage check below, as strdelim is done. */ | |
726 | return 0; | |
727 | ||
728 | case oEscapeChar: | |
729 | intptr = &options->escape_char; | |
730 | arg = strdelim(&s); | |
731 | if (!arg || *arg == '\0') | |
732 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
733 | if (arg[0] == '^' && arg[2] == 0 && | |
734 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) | |
735 | value = (u_char) arg[1] & 31; | |
736 | else if (strlen(arg) == 1) | |
737 | value = (u_char) arg[0]; | |
738 | else if (strcmp(arg, "none") == 0) | |
739 | value = SSH_ESCAPECHAR_NONE; | |
740 | else { | |
741 | fatal("%.200s line %d: Bad escape character.", | |
e9702f7d | 742 | filename, linenum); |
3c0ef626 | 743 | /* NOTREACHED */ |
744 | value = 0; /* Avoid compiler warning. */ | |
745 | } | |
746 | if (*activep && *intptr == -1) | |
747 | *intptr = value; | |
748 | break; | |
749 | ||
7cac2b65 | 750 | case oAddressFamily: |
751 | arg = strdelim(&s); | |
2ce0bfe4 | 752 | if (!arg || *arg == '\0') |
753 | fatal("%s line %d: missing address family.", | |
754 | filename, linenum); | |
7cac2b65 | 755 | intptr = &options->address_family; |
756 | if (strcasecmp(arg, "inet") == 0) | |
757 | value = AF_INET; | |
758 | else if (strcasecmp(arg, "inet6") == 0) | |
759 | value = AF_INET6; | |
760 | else if (strcasecmp(arg, "any") == 0) | |
761 | value = AF_UNSPEC; | |
762 | else | |
763 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
764 | if (*activep && *intptr == -1) | |
765 | *intptr = value; | |
766 | break; | |
767 | ||
bfe49944 | 768 | case oEnableSSHKeysign: |
769 | intptr = &options->enable_ssh_keysign; | |
770 | goto parse_flag; | |
771 | ||
12a403af | 772 | case oIdentitiesOnly: |
773 | intptr = &options->identities_only; | |
774 | goto parse_flag; | |
775 | ||
540d72c3 | 776 | case oServerAliveInterval: |
777 | intptr = &options->server_alive_interval; | |
778 | goto parse_time; | |
779 | ||
780 | case oServerAliveCountMax: | |
781 | intptr = &options->server_alive_count_max; | |
782 | goto parse_int; | |
783 | ||
7e82606e | 784 | case oSendEnv: |
785 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
786 | if (strchr(arg, '=') != NULL) | |
787 | fatal("%s line %d: Invalid environment name.", | |
788 | filename, linenum); | |
dfddba3d | 789 | if (!*activep) |
790 | continue; | |
7e82606e | 791 | if (options->num_send_env >= MAX_SEND_ENV) |
792 | fatal("%s line %d: too many send env.", | |
793 | filename, linenum); | |
794 | options->send_env[options->num_send_env++] = | |
795 | xstrdup(arg); | |
796 | } | |
797 | break; | |
798 | ||
799 | case oControlPath: | |
800 | charptr = &options->control_path; | |
801 | goto parse_string; | |
802 | ||
803 | case oControlMaster: | |
804 | intptr = &options->control_master; | |
2ce0bfe4 | 805 | arg = strdelim(&s); |
806 | if (!arg || *arg == '\0') | |
807 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
808 | filename, linenum); | |
809 | value = 0; /* To avoid compiler warning... */ | |
810 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
811 | value = SSHCTL_MASTER_YES; | |
812 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
813 | value = SSHCTL_MASTER_NO; | |
814 | else if (strcmp(arg, "auto") == 0) | |
815 | value = SSHCTL_MASTER_AUTO; | |
816 | else if (strcmp(arg, "ask") == 0) | |
817 | value = SSHCTL_MASTER_ASK; | |
818 | else if (strcmp(arg, "autoask") == 0) | |
819 | value = SSHCTL_MASTER_AUTO_ASK; | |
820 | else | |
821 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
822 | filename, linenum); | |
823 | if (*activep && *intptr == -1) | |
824 | *intptr = value; | |
825 | break; | |
7e82606e | 826 | |
dfddba3d | 827 | case oHashKnownHosts: |
828 | intptr = &options->hash_known_hosts; | |
829 | goto parse_flag; | |
830 | ||
44a053a3 | 831 | case oDeprecated: |
832 | debug("%s line %d: Deprecated option \"%s\"", | |
833 | filename, linenum, keyword); | |
834 | return 0; | |
835 | ||
7cac2b65 | 836 | case oUnsupported: |
837 | error("%s line %d: Unsupported option \"%s\"", | |
838 | filename, linenum, keyword); | |
839 | return 0; | |
840 | ||
3c0ef626 | 841 | default: |
842 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
843 | } | |
844 | ||
845 | /* Check that there is no garbage at end of line. */ | |
846 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
847 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
2ce0bfe4 | 848 | filename, linenum, arg); |
3c0ef626 | 849 | } |
850 | return 0; | |
851 | } | |
852 | ||
853 | ||
854 | /* | |
855 | * Reads the config file and modifies the options accordingly. Options | |
856 | * should already be initialized before this call. This never returns if | |
857 | * there is an error. If the file does not exist, this returns 0. | |
858 | */ | |
859 | ||
860 | int | |
7e82606e | 861 | read_config_file(const char *filename, const char *host, Options *options, |
862 | int checkperm) | |
3c0ef626 | 863 | { |
864 | FILE *f; | |
865 | char line[1024]; | |
866 | int active, linenum; | |
867 | int bad_options = 0; | |
868 | ||
869 | /* Open the file. */ | |
7e82606e | 870 | if ((f = fopen(filename, "r")) == NULL) |
3c0ef626 | 871 | return 0; |
872 | ||
7e82606e | 873 | if (checkperm) { |
874 | struct stat sb; | |
875 | ||
876 | if (fstat(fileno(f), &sb) == -1) | |
877 | fatal("fstat %s: %s", filename, strerror(errno)); | |
878 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || | |
879 | (sb.st_mode & 022) != 0)) | |
880 | fatal("Bad owner or permissions on %s", filename); | |
881 | } | |
882 | ||
3c0ef626 | 883 | debug("Reading configuration data %.200s", filename); |
884 | ||
885 | /* | |
886 | * Mark that we are now processing the options. This flag is turned | |
887 | * on/off by Host specifications. | |
888 | */ | |
889 | active = 1; | |
890 | linenum = 0; | |
891 | while (fgets(line, sizeof(line), f)) { | |
892 | /* Update line number counter. */ | |
893 | linenum++; | |
894 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
895 | bad_options++; | |
896 | } | |
897 | fclose(f); | |
898 | if (bad_options > 0) | |
899 | fatal("%s: terminating, %d bad configuration options", | |
e9702f7d | 900 | filename, bad_options); |
3c0ef626 | 901 | return 1; |
902 | } | |
903 | ||
904 | /* | |
905 | * Initializes options to special values that indicate that they have not yet | |
906 | * been set. Read_config_file will only set options with this value. Options | |
907 | * are processed in the following order: command line, user config file, | |
908 | * system config file. Last, fill_default_options is called. | |
909 | */ | |
910 | ||
911 | void | |
912 | initialize_options(Options * options) | |
913 | { | |
914 | memset(options, 'X', sizeof(*options)); | |
915 | options->forward_agent = -1; | |
916 | options->forward_x11 = -1; | |
540d72c3 | 917 | options->forward_x11_trusted = -1; |
3c0ef626 | 918 | options->xauth_location = NULL; |
919 | options->gateway_ports = -1; | |
920 | options->use_privileged_port = -1; | |
3c0ef626 | 921 | options->rsa_authentication = -1; |
922 | options->pubkey_authentication = -1; | |
923 | options->challenge_response_authentication = -1; | |
7cac2b65 | 924 | options->gss_authentication = -1; |
7a056ed1 | 925 | options->gss_keyex = -1; |
7cac2b65 | 926 | options->gss_deleg_creds = -1; |
3c0ef626 | 927 | options->password_authentication = -1; |
928 | options->kbd_interactive_authentication = -1; | |
929 | options->kbd_interactive_devices = NULL; | |
930 | options->rhosts_rsa_authentication = -1; | |
931 | options->hostbased_authentication = -1; | |
3c0ef626 | 932 | options->batch_mode = -1; |
933 | options->check_host_ip = -1; | |
934 | options->strict_host_key_checking = -1; | |
935 | options->compression = -1; | |
540d72c3 | 936 | options->tcp_keep_alive = -1; |
3c0ef626 | 937 | options->compression_level = -1; |
938 | options->port = -1; | |
7cac2b65 | 939 | options->address_family = -1; |
3c0ef626 | 940 | options->connection_attempts = -1; |
7cac2b65 | 941 | options->connection_timeout = -1; |
3c0ef626 | 942 | options->number_of_password_prompts = -1; |
943 | options->cipher = -1; | |
944 | options->ciphers = NULL; | |
945 | options->macs = NULL; | |
946 | options->hostkeyalgorithms = NULL; | |
947 | options->protocol = SSH_PROTO_UNKNOWN; | |
948 | options->num_identity_files = 0; | |
949 | options->hostname = NULL; | |
950 | options->host_key_alias = NULL; | |
951 | options->proxy_command = NULL; | |
952 | options->user = NULL; | |
953 | options->escape_char = -1; | |
954 | options->system_hostfile = NULL; | |
955 | options->user_hostfile = NULL; | |
956 | options->system_hostfile2 = NULL; | |
957 | options->user_hostfile2 = NULL; | |
958 | options->num_local_forwards = 0; | |
959 | options->num_remote_forwards = 0; | |
960 | options->clear_forwardings = -1; | |
e9702f7d | 961 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
3c0ef626 | 962 | options->preferred_authentications = NULL; |
963 | options->bind_address = NULL; | |
964 | options->smartcard_device = NULL; | |
bfe49944 | 965 | options->enable_ssh_keysign = - 1; |
3c0ef626 | 966 | options->no_host_authentication_for_localhost = - 1; |
12a403af | 967 | options->identities_only = - 1; |
7cac2b65 | 968 | options->rekey_limit = - 1; |
969 | options->verify_host_key_dns = -1; | |
540d72c3 | 970 | options->server_alive_interval = -1; |
971 | options->server_alive_count_max = -1; | |
7e82606e | 972 | options->num_send_env = 0; |
973 | options->control_path = NULL; | |
974 | options->control_master = -1; | |
dfddba3d | 975 | options->hash_known_hosts = -1; |
3c0ef626 | 976 | } |
977 | ||
978 | /* | |
979 | * Called after processing other sources of option data, this fills those | |
980 | * options for which no value has been specified with their default values. | |
981 | */ | |
982 | ||
983 | void | |
984 | fill_default_options(Options * options) | |
985 | { | |
986 | int len; | |
987 | ||
988 | if (options->forward_agent == -1) | |
989 | options->forward_agent = 0; | |
990 | if (options->forward_x11 == -1) | |
991 | options->forward_x11 = 0; | |
540d72c3 | 992 | if (options->forward_x11_trusted == -1) |
993 | options->forward_x11_trusted = 0; | |
3c0ef626 | 994 | if (options->xauth_location == NULL) |
995 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 996 | if (options->gateway_ports == -1) |
997 | options->gateway_ports = 0; | |
998 | if (options->use_privileged_port == -1) | |
999 | options->use_privileged_port = 0; | |
3c0ef626 | 1000 | if (options->rsa_authentication == -1) |
1001 | options->rsa_authentication = 1; | |
1002 | if (options->pubkey_authentication == -1) | |
1003 | options->pubkey_authentication = 1; | |
1004 | if (options->challenge_response_authentication == -1) | |
1005 | options->challenge_response_authentication = 1; | |
5598e598 | 1006 | if (options->gss_authentication == -1) |
1007 | options->gss_authentication = 1; | |
7a056ed1 | 1008 | if (options->gss_keyex == -1) |
1009 | options->gss_keyex = 1; | |
5598e598 | 1010 | if (options->gss_deleg_creds == -1) |
1011 | options->gss_deleg_creds = 1; | |
3c0ef626 | 1012 | if (options->password_authentication == -1) |
1013 | options->password_authentication = 1; | |
1014 | if (options->kbd_interactive_authentication == -1) | |
1015 | options->kbd_interactive_authentication = 1; | |
1016 | if (options->rhosts_rsa_authentication == -1) | |
44a053a3 | 1017 | options->rhosts_rsa_authentication = 0; |
3c0ef626 | 1018 | if (options->hostbased_authentication == -1) |
1019 | options->hostbased_authentication = 0; | |
3c0ef626 | 1020 | if (options->batch_mode == -1) |
1021 | options->batch_mode = 0; | |
1022 | if (options->check_host_ip == -1) | |
1023 | options->check_host_ip = 1; | |
1024 | if (options->strict_host_key_checking == -1) | |
1025 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1026 | if (options->compression == -1) | |
1027 | options->compression = 0; | |
540d72c3 | 1028 | if (options->tcp_keep_alive == -1) |
1029 | options->tcp_keep_alive = 1; | |
3c0ef626 | 1030 | if (options->compression_level == -1) |
1031 | options->compression_level = 6; | |
1032 | if (options->port == -1) | |
1033 | options->port = 0; /* Filled in ssh_connect. */ | |
7cac2b65 | 1034 | if (options->address_family == -1) |
1035 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 1036 | if (options->connection_attempts == -1) |
1037 | options->connection_attempts = 1; | |
1038 | if (options->number_of_password_prompts == -1) | |
1039 | options->number_of_password_prompts = 3; | |
1040 | /* Selected in ssh_login(). */ | |
1041 | if (options->cipher == -1) | |
1042 | options->cipher = SSH_CIPHER_NOT_SET; | |
1043 | /* options->ciphers, default set in myproposals.h */ | |
1044 | /* options->macs, default set in myproposals.h */ | |
1045 | /* options->hostkeyalgorithms, default set in myproposals.h */ | |
1046 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
1047 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
1048 | if (options->num_identity_files == 0) { | |
1049 | if (options->protocol & SSH_PROTO_1) { | |
1050 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; | |
1051 | options->identity_files[options->num_identity_files] = | |
1052 | xmalloc(len); | |
1053 | snprintf(options->identity_files[options->num_identity_files++], | |
1054 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
1055 | } | |
1056 | if (options->protocol & SSH_PROTO_2) { | |
1057 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; | |
1058 | options->identity_files[options->num_identity_files] = | |
1059 | xmalloc(len); | |
1060 | snprintf(options->identity_files[options->num_identity_files++], | |
1061 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1062 | ||
1063 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; | |
1064 | options->identity_files[options->num_identity_files] = | |
1065 | xmalloc(len); | |
1066 | snprintf(options->identity_files[options->num_identity_files++], | |
1067 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
1068 | } | |
1069 | } | |
1070 | if (options->escape_char == -1) | |
1071 | options->escape_char = '~'; | |
1072 | if (options->system_hostfile == NULL) | |
1073 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; | |
1074 | if (options->user_hostfile == NULL) | |
1075 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; | |
1076 | if (options->system_hostfile2 == NULL) | |
1077 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; | |
1078 | if (options->user_hostfile2 == NULL) | |
1079 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; | |
e9702f7d | 1080 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 1081 | options->log_level = SYSLOG_LEVEL_INFO; |
1082 | if (options->clear_forwardings == 1) | |
1083 | clear_forwardings(options); | |
1084 | if (options->no_host_authentication_for_localhost == - 1) | |
1085 | options->no_host_authentication_for_localhost = 0; | |
12a403af | 1086 | if (options->identities_only == -1) |
1087 | options->identities_only = 0; | |
bfe49944 | 1088 | if (options->enable_ssh_keysign == -1) |
1089 | options->enable_ssh_keysign = 0; | |
7cac2b65 | 1090 | if (options->rekey_limit == -1) |
1091 | options->rekey_limit = 0; | |
1092 | if (options->verify_host_key_dns == -1) | |
1093 | options->verify_host_key_dns = 0; | |
540d72c3 | 1094 | if (options->server_alive_interval == -1) |
1095 | options->server_alive_interval = 0; | |
1096 | if (options->server_alive_count_max == -1) | |
1097 | options->server_alive_count_max = 3; | |
7e82606e | 1098 | if (options->control_master == -1) |
1099 | options->control_master = 0; | |
dfddba3d | 1100 | if (options->hash_known_hosts == -1) |
1101 | options->hash_known_hosts = 0; | |
3c0ef626 | 1102 | /* options->proxy_command should not be set by default */ |
1103 | /* options->user will be set in the main program if appropriate */ | |
1104 | /* options->hostname will be set in the main program if appropriate */ | |
1105 | /* options->host_key_alias should not be set by default */ | |
1106 | /* options->preferred_authentications will be set in ssh */ | |
1107 | } | |
dfddba3d | 1108 | |
1109 | /* | |
1110 | * parse_forward | |
1111 | * parses a string containing a port forwarding specification of the form: | |
1112 | * [listenhost:]listenport:connecthost:connectport | |
1113 | * returns number of arguments parsed or zero on error | |
1114 | */ | |
1115 | int | |
1116 | parse_forward(Forward *fwd, const char *fwdspec) | |
1117 | { | |
1118 | int i; | |
1119 | char *p, *cp, *fwdarg[4]; | |
1120 | ||
1121 | memset(fwd, '\0', sizeof(*fwd)); | |
1122 | ||
1123 | cp = p = xstrdup(fwdspec); | |
1124 | ||
1125 | /* skip leading spaces */ | |
1126 | while (*cp && isspace(*cp)) | |
1127 | cp++; | |
1128 | ||
1129 | for (i = 0; i < 4; ++i) | |
1130 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1131 | break; | |
1132 | ||
1133 | /* Check for trailing garbage in 4-arg case*/ | |
1134 | if (cp != NULL) | |
1135 | i = 0; /* failure */ | |
1136 | ||
1137 | switch (i) { | |
1138 | case 3: | |
1139 | fwd->listen_host = NULL; | |
1140 | fwd->listen_port = a2port(fwdarg[0]); | |
1141 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1142 | fwd->connect_port = a2port(fwdarg[2]); | |
1143 | break; | |
1144 | ||
1145 | case 4: | |
1146 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1147 | fwd->listen_port = a2port(fwdarg[1]); | |
1148 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1149 | fwd->connect_port = a2port(fwdarg[3]); | |
1150 | break; | |
1151 | default: | |
1152 | i = 0; /* failure */ | |
1153 | } | |
1154 | ||
1155 | xfree(p); | |
1156 | ||
1157 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1158 | goto fail_free; | |
1159 | ||
1160 | if (fwd->connect_host != NULL && | |
1161 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1162 | goto fail_free; | |
1163 | ||
1164 | return (i); | |
1165 | ||
1166 | fail_free: | |
1167 | if (fwd->connect_host != NULL) | |
1168 | xfree(fwd->connect_host); | |
1169 | if (fwd->listen_host != NULL) | |
1170 | xfree(fwd->listen_host); | |
1171 | return (0); | |
1172 | } |