]>
Commit | Line | Data |
---|---|---|
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" | |
08822d99 | 15 | RCSID("$OpenBSD: readconf.c,v 1.145 2005/12/08 18:34:11 reyk 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 | ||
08822d99 | 73 | Host vpn.fake.com |
74 | Tunnel yes | |
75 | TunnelDevice 3 | |
76 | ||
3c0ef626 | 77 | # Defaults for various options |
78 | Host * | |
79 | ForwardAgent no | |
80 | ForwardX11 no | |
3c0ef626 | 81 | PasswordAuthentication yes |
82 | RSAAuthentication yes | |
83 | RhostsRSAAuthentication yes | |
3c0ef626 | 84 | StrictHostKeyChecking yes |
540d72c3 | 85 | TcpKeepAlive no |
3c0ef626 | 86 | IdentityFile ~/.ssh/identity |
87 | Port 22 | |
88 | EscapeChar ~ | |
89 | ||
90 | */ | |
91 | ||
92 | /* Keyword tokens. */ | |
93 | ||
94 | typedef enum { | |
95 | oBadOption, | |
540d72c3 | 96 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
44a053a3 | 97 | oPasswordAuthentication, oRSAAuthentication, |
3c0ef626 | 98 | oChallengeResponseAuthentication, oXAuthLocation, |
3c0ef626 | 99 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
100 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
101 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
102 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
540d72c3 | 103 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
3c0ef626 | 104 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
105 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, | |
106 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, | |
107 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, | |
108 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, | |
44a053a3 | 109 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
7cac2b65 | 110 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
111 | oAddressFamily, oGssAuthentication, oGssKeyEx, oGssDelegateCreds, | |
fe4ad273 | 112 | oGssTrustDns, |
12a403af | 113 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
dfddba3d | 114 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
08822d99 | 115 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
7cac2b65 | 116 | oDeprecated, oUnsupported |
3c0ef626 | 117 | } OpCodes; |
118 | ||
119 | /* Textual representations of the tokens. */ | |
120 | ||
121 | static struct { | |
122 | const char *name; | |
123 | OpCodes opcode; | |
124 | } keywords[] = { | |
125 | { "forwardagent", oForwardAgent }, | |
126 | { "forwardx11", oForwardX11 }, | |
540d72c3 | 127 | { "forwardx11trusted", oForwardX11Trusted }, |
3c0ef626 | 128 | { "xauthlocation", oXAuthLocation }, |
129 | { "gatewayports", oGatewayPorts }, | |
130 | { "useprivilegedport", oUsePrivilegedPort }, | |
7cac2b65 | 131 | { "rhostsauthentication", oDeprecated }, |
3c0ef626 | 132 | { "passwordauthentication", oPasswordAuthentication }, |
133 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, | |
134 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
135 | { "rsaauthentication", oRSAAuthentication }, | |
136 | { "pubkeyauthentication", oPubkeyAuthentication }, | |
137 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ | |
138 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
139 | { "hostbasedauthentication", oHostbasedAuthentication }, | |
140 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, | |
141 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
142 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
7cac2b65 | 143 | { "kerberosauthentication", oUnsupported }, |
144 | { "kerberostgtpassing", oUnsupported }, | |
145 | { "afstokenpassing", oUnsupported }, | |
146 | #if defined(GSSAPI) | |
5598e598 | 147 | { "gssapiauthentication", oGssAuthentication }, |
7a056ed1 | 148 | { "gssapikeyexchange", oGssKeyEx }, |
5598e598 | 149 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
fe4ad273 | 150 | { "gssapitrustdns", oGssTrustDns }, |
7cac2b65 | 151 | #else |
152 | { "gssapiauthentication", oUnsupported }, | |
153 | { "gssapikeyexchange", oUnsupported }, | |
154 | { "gssapidelegatecredentials", oUnsupported }, | |
fe4ad273 | 155 | { "gssapitrustdns", oUnsupported }, |
3c0ef626 | 156 | #endif |
44a053a3 | 157 | { "fallbacktorsh", oDeprecated }, |
158 | { "usersh", oDeprecated }, | |
3c0ef626 | 159 | { "identityfile", oIdentityFile }, |
160 | { "identityfile2", oIdentityFile }, /* alias */ | |
12a403af | 161 | { "identitiesonly", oIdentitiesOnly }, |
3c0ef626 | 162 | { "hostname", oHostName }, |
163 | { "hostkeyalias", oHostKeyAlias }, | |
164 | { "proxycommand", oProxyCommand }, | |
165 | { "port", oPort }, | |
166 | { "cipher", oCipher }, | |
167 | { "ciphers", oCiphers }, | |
168 | { "macs", oMacs }, | |
169 | { "protocol", oProtocol }, | |
170 | { "remoteforward", oRemoteForward }, | |
171 | { "localforward", oLocalForward }, | |
172 | { "user", oUser }, | |
173 | { "host", oHost }, | |
174 | { "escapechar", oEscapeChar }, | |
175 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
176 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ | |
177 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, | |
178 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ | |
179 | { "connectionattempts", oConnectionAttempts }, | |
180 | { "batchmode", oBatchMode }, | |
181 | { "checkhostip", oCheckHostIP }, | |
182 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
183 | { "compression", oCompression }, | |
184 | { "compressionlevel", oCompressionLevel }, | |
540d72c3 | 185 | { "tcpkeepalive", oTCPKeepAlive }, |
186 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
3c0ef626 | 187 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
188 | { "loglevel", oLogLevel }, | |
189 | { "dynamicforward", oDynamicForward }, | |
190 | { "preferredauthentications", oPreferredAuthentications }, | |
191 | { "hostkeyalgorithms", oHostKeyAlgorithms }, | |
192 | { "bindaddress", oBindAddress }, | |
7cac2b65 | 193 | #ifdef SMARTCARD |
3c0ef626 | 194 | { "smartcarddevice", oSmartcardDevice }, |
7cac2b65 | 195 | #else |
196 | { "smartcarddevice", oUnsupported }, | |
197 | #endif | |
e9702f7d | 198 | { "clearallforwardings", oClearAllForwardings }, |
bfe49944 | 199 | { "enablesshkeysign", oEnableSSHKeysign }, |
7cac2b65 | 200 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
e9702f7d | 201 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
7cac2b65 | 202 | { "rekeylimit", oRekeyLimit }, |
203 | { "connecttimeout", oConnectTimeout }, | |
204 | { "addressfamily", oAddressFamily }, | |
540d72c3 | 205 | { "serveraliveinterval", oServerAliveInterval }, |
206 | { "serveralivecountmax", oServerAliveCountMax }, | |
7e82606e | 207 | { "sendenv", oSendEnv }, |
208 | { "controlpath", oControlPath }, | |
209 | { "controlmaster", oControlMaster }, | |
dfddba3d | 210 | { "hashknownhosts", oHashKnownHosts }, |
08822d99 | 211 | { "tunnel", oTunnel }, |
212 | { "tunneldevice", oTunnelDevice }, | |
213 | { "localcommand", oLocalCommand }, | |
214 | { "permitlocalcommand", oPermitLocalCommand }, | |
e9702f7d | 215 | { NULL, oBadOption } |
3c0ef626 | 216 | }; |
217 | ||
218 | /* | |
219 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
220 | * error. | |
221 | */ | |
222 | ||
223 | void | |
dfddba3d | 224 | add_local_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 225 | { |
226 | Forward *fwd; | |
d03f4262 | 227 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
3c0ef626 | 228 | extern uid_t original_real_uid; |
dfddba3d | 229 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
3c0ef626 | 230 | fatal("Privileged ports can only be forwarded by root."); |
231 | #endif | |
232 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
233 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
234 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
dfddba3d | 235 | |
236 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
237 | NULL : xstrdup(newfwd->listen_host); | |
238 | fwd->listen_port = newfwd->listen_port; | |
239 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
240 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 241 | } |
242 | ||
243 | /* | |
244 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
245 | * an error. | |
246 | */ | |
247 | ||
248 | void | |
dfddba3d | 249 | add_remote_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 250 | { |
251 | Forward *fwd; | |
252 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
253 | fatal("Too many remote forwards (max %d).", | |
e9702f7d | 254 | SSH_MAX_FORWARDS_PER_DIRECTION); |
3c0ef626 | 255 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
dfddba3d | 256 | |
257 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
258 | NULL : xstrdup(newfwd->listen_host); | |
259 | fwd->listen_port = newfwd->listen_port; | |
260 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
261 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 262 | } |
263 | ||
264 | static void | |
265 | clear_forwardings(Options *options) | |
266 | { | |
267 | int i; | |
268 | ||
dfddba3d | 269 | for (i = 0; i < options->num_local_forwards; i++) { |
8b32eddc | 270 | if (options->local_forwards[i].listen_host != NULL) |
271 | xfree(options->local_forwards[i].listen_host); | |
dfddba3d | 272 | xfree(options->local_forwards[i].connect_host); |
273 | } | |
3c0ef626 | 274 | options->num_local_forwards = 0; |
dfddba3d | 275 | for (i = 0; i < options->num_remote_forwards; i++) { |
8b32eddc | 276 | if (options->remote_forwards[i].listen_host != NULL) |
277 | xfree(options->remote_forwards[i].listen_host); | |
dfddba3d | 278 | xfree(options->remote_forwards[i].connect_host); |
279 | } | |
3c0ef626 | 280 | options->num_remote_forwards = 0; |
08822d99 | 281 | options->tun_open = SSH_TUNMODE_NO; |
3c0ef626 | 282 | } |
283 | ||
284 | /* | |
285 | * Returns the number of the token pointed to by cp or oBadOption. | |
286 | */ | |
287 | ||
288 | static OpCodes | |
289 | parse_token(const char *cp, const char *filename, int linenum) | |
290 | { | |
291 | u_int i; | |
292 | ||
293 | for (i = 0; keywords[i].name; i++) | |
294 | if (strcasecmp(cp, keywords[i].name) == 0) | |
295 | return keywords[i].opcode; | |
296 | ||
297 | error("%s: line %d: Bad configuration option: %s", | |
298 | filename, linenum, cp); | |
299 | return oBadOption; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Processes a single option line as used in the configuration files. This | |
304 | * only sets those values that have not already been set. | |
305 | */ | |
bfe49944 | 306 | #define WHITESPACE " \t\r\n" |
3c0ef626 | 307 | |
308 | int | |
309 | process_config_line(Options *options, const char *host, | |
310 | char *line, const char *filename, int linenum, | |
311 | int *activep) | |
312 | { | |
dfddba3d | 313 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
08822d99 | 314 | int opcode, *intptr, value, value2; |
bfe49944 | 315 | size_t len; |
dfddba3d | 316 | Forward fwd; |
3c0ef626 | 317 | |
7cac2b65 | 318 | /* Strip trailing whitespace */ |
8b32eddc | 319 | for (len = strlen(line) - 1; len > 0; len--) { |
7cac2b65 | 320 | if (strchr(WHITESPACE, line[len]) == NULL) |
321 | break; | |
322 | line[len] = '\0'; | |
323 | } | |
324 | ||
3c0ef626 | 325 | s = line; |
326 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
327 | keyword = strdelim(&s); | |
328 | /* Ignore leading whitespace. */ | |
329 | if (*keyword == '\0') | |
330 | keyword = strdelim(&s); | |
331 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') | |
332 | return 0; | |
333 | ||
334 | opcode = parse_token(keyword, filename, linenum); | |
335 | ||
336 | switch (opcode) { | |
337 | case oBadOption: | |
338 | /* don't panic, but count bad options */ | |
339 | return -1; | |
340 | /* NOTREACHED */ | |
7cac2b65 | 341 | case oConnectTimeout: |
342 | intptr = &options->connection_timeout; | |
540d72c3 | 343 | parse_time: |
7cac2b65 | 344 | arg = strdelim(&s); |
345 | if (!arg || *arg == '\0') | |
346 | fatal("%s line %d: missing time value.", | |
347 | filename, linenum); | |
348 | if ((value = convtime(arg)) == -1) | |
349 | fatal("%s line %d: invalid time value.", | |
350 | filename, linenum); | |
351 | if (*intptr == -1) | |
352 | *intptr = value; | |
353 | break; | |
354 | ||
3c0ef626 | 355 | case oForwardAgent: |
356 | intptr = &options->forward_agent; | |
357 | parse_flag: | |
358 | arg = strdelim(&s); | |
359 | if (!arg || *arg == '\0') | |
360 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
361 | value = 0; /* To avoid compiler warning... */ | |
362 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
363 | value = 1; | |
364 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
365 | value = 0; | |
366 | else | |
367 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
368 | if (*activep && *intptr == -1) | |
369 | *intptr = value; | |
370 | break; | |
371 | ||
372 | case oForwardX11: | |
373 | intptr = &options->forward_x11; | |
374 | goto parse_flag; | |
375 | ||
540d72c3 | 376 | case oForwardX11Trusted: |
377 | intptr = &options->forward_x11_trusted; | |
378 | goto parse_flag; | |
379 | ||
3c0ef626 | 380 | case oGatewayPorts: |
381 | intptr = &options->gateway_ports; | |
382 | goto parse_flag; | |
383 | ||
384 | case oUsePrivilegedPort: | |
385 | intptr = &options->use_privileged_port; | |
386 | goto parse_flag; | |
387 | ||
3c0ef626 | 388 | case oPasswordAuthentication: |
389 | intptr = &options->password_authentication; | |
390 | goto parse_flag; | |
391 | ||
392 | case oKbdInteractiveAuthentication: | |
393 | intptr = &options->kbd_interactive_authentication; | |
394 | goto parse_flag; | |
395 | ||
396 | case oKbdInteractiveDevices: | |
397 | charptr = &options->kbd_interactive_devices; | |
398 | goto parse_string; | |
399 | ||
400 | case oPubkeyAuthentication: | |
401 | intptr = &options->pubkey_authentication; | |
402 | goto parse_flag; | |
403 | ||
404 | case oRSAAuthentication: | |
405 | intptr = &options->rsa_authentication; | |
406 | goto parse_flag; | |
407 | ||
408 | case oRhostsRSAAuthentication: | |
409 | intptr = &options->rhosts_rsa_authentication; | |
410 | goto parse_flag; | |
411 | ||
412 | case oHostbasedAuthentication: | |
413 | intptr = &options->hostbased_authentication; | |
414 | goto parse_flag; | |
415 | ||
416 | case oChallengeResponseAuthentication: | |
417 | intptr = &options->challenge_response_authentication; | |
418 | goto parse_flag; | |
7cac2b65 | 419 | |
5598e598 | 420 | case oGssAuthentication: |
421 | intptr = &options->gss_authentication; | |
422 | goto parse_flag; | |
7cac2b65 | 423 | |
7a056ed1 | 424 | case oGssKeyEx: |
425 | intptr = &options->gss_keyex; | |
426 | goto parse_flag; | |
427 | ||
5598e598 | 428 | case oGssDelegateCreds: |
429 | intptr = &options->gss_deleg_creds; | |
430 | goto parse_flag; | |
5598e598 | 431 | |
fe4ad273 | 432 | case oGssTrustDns: |
433 | intptr = &options->gss_trust_dns; | |
434 | goto parse_flag; | |
435 | ||
3c0ef626 | 436 | case oBatchMode: |
437 | intptr = &options->batch_mode; | |
438 | goto parse_flag; | |
439 | ||
440 | case oCheckHostIP: | |
441 | intptr = &options->check_host_ip; | |
442 | goto parse_flag; | |
443 | ||
7cac2b65 | 444 | case oVerifyHostKeyDNS: |
445 | intptr = &options->verify_host_key_dns; | |
540d72c3 | 446 | goto parse_yesnoask; |
7cac2b65 | 447 | |
3c0ef626 | 448 | case oStrictHostKeyChecking: |
449 | intptr = &options->strict_host_key_checking; | |
540d72c3 | 450 | parse_yesnoask: |
3c0ef626 | 451 | arg = strdelim(&s); |
452 | if (!arg || *arg == '\0') | |
453 | fatal("%.200s line %d: Missing yes/no/ask argument.", | |
e9702f7d | 454 | filename, linenum); |
3c0ef626 | 455 | value = 0; /* To avoid compiler warning... */ |
456 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
457 | value = 1; | |
458 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
459 | value = 0; | |
460 | else if (strcmp(arg, "ask") == 0) | |
461 | value = 2; | |
462 | else | |
463 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
464 | if (*activep && *intptr == -1) | |
465 | *intptr = value; | |
466 | break; | |
467 | ||
468 | case oCompression: | |
469 | intptr = &options->compression; | |
470 | goto parse_flag; | |
471 | ||
540d72c3 | 472 | case oTCPKeepAlive: |
473 | intptr = &options->tcp_keep_alive; | |
3c0ef626 | 474 | goto parse_flag; |
475 | ||
476 | case oNoHostAuthenticationForLocalhost: | |
477 | intptr = &options->no_host_authentication_for_localhost; | |
478 | goto parse_flag; | |
479 | ||
480 | case oNumberOfPasswordPrompts: | |
481 | intptr = &options->number_of_password_prompts; | |
482 | goto parse_int; | |
483 | ||
484 | case oCompressionLevel: | |
485 | intptr = &options->compression_level; | |
486 | goto parse_int; | |
487 | ||
7cac2b65 | 488 | case oRekeyLimit: |
489 | intptr = &options->rekey_limit; | |
490 | arg = strdelim(&s); | |
491 | if (!arg || *arg == '\0') | |
492 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
493 | if (arg[0] < '0' || arg[0] > '9') | |
494 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
495 | value = strtol(arg, &endofnumber, 10); | |
496 | if (arg == endofnumber) | |
497 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
498 | switch (toupper(*endofnumber)) { | |
499 | case 'K': | |
500 | value *= 1<<10; | |
501 | break; | |
502 | case 'M': | |
503 | value *= 1<<20; | |
504 | break; | |
505 | case 'G': | |
506 | value *= 1<<30; | |
507 | break; | |
508 | } | |
509 | if (*activep && *intptr == -1) | |
510 | *intptr = value; | |
511 | break; | |
512 | ||
3c0ef626 | 513 | case oIdentityFile: |
514 | arg = strdelim(&s); | |
515 | if (!arg || *arg == '\0') | |
516 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
517 | if (*activep) { | |
518 | intptr = &options->num_identity_files; | |
519 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
520 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
e9702f7d | 521 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
3c0ef626 | 522 | charptr = &options->identity_files[*intptr]; |
523 | *charptr = xstrdup(arg); | |
524 | *intptr = *intptr + 1; | |
525 | } | |
526 | break; | |
527 | ||
528 | case oXAuthLocation: | |
529 | charptr=&options->xauth_location; | |
530 | goto parse_string; | |
531 | ||
532 | case oUser: | |
533 | charptr = &options->user; | |
534 | parse_string: | |
535 | arg = strdelim(&s); | |
536 | if (!arg || *arg == '\0') | |
537 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
538 | if (*activep && *charptr == NULL) | |
539 | *charptr = xstrdup(arg); | |
540 | break; | |
541 | ||
542 | case oGlobalKnownHostsFile: | |
543 | charptr = &options->system_hostfile; | |
544 | goto parse_string; | |
545 | ||
546 | case oUserKnownHostsFile: | |
547 | charptr = &options->user_hostfile; | |
548 | goto parse_string; | |
549 | ||
550 | case oGlobalKnownHostsFile2: | |
551 | charptr = &options->system_hostfile2; | |
552 | goto parse_string; | |
553 | ||
554 | case oUserKnownHostsFile2: | |
555 | charptr = &options->user_hostfile2; | |
556 | goto parse_string; | |
557 | ||
558 | case oHostName: | |
559 | charptr = &options->hostname; | |
560 | goto parse_string; | |
561 | ||
562 | case oHostKeyAlias: | |
563 | charptr = &options->host_key_alias; | |
564 | goto parse_string; | |
565 | ||
566 | case oPreferredAuthentications: | |
567 | charptr = &options->preferred_authentications; | |
568 | goto parse_string; | |
569 | ||
570 | case oBindAddress: | |
571 | charptr = &options->bind_address; | |
572 | goto parse_string; | |
573 | ||
574 | case oSmartcardDevice: | |
575 | charptr = &options->smartcard_device; | |
576 | goto parse_string; | |
577 | ||
578 | case oProxyCommand: | |
08822d99 | 579 | charptr = &options->proxy_command; |
580 | parse_command: | |
7cac2b65 | 581 | if (s == NULL) |
582 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
bfe49944 | 583 | len = strspn(s, WHITESPACE "="); |
3c0ef626 | 584 | if (*activep && *charptr == NULL) |
bfe49944 | 585 | *charptr = xstrdup(s + len); |
3c0ef626 | 586 | return 0; |
587 | ||
588 | case oPort: | |
589 | intptr = &options->port; | |
590 | parse_int: | |
591 | arg = strdelim(&s); | |
592 | if (!arg || *arg == '\0') | |
593 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
594 | if (arg[0] < '0' || arg[0] > '9') | |
595 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
596 | ||
597 | /* Octal, decimal, or hex format? */ | |
598 | value = strtol(arg, &endofnumber, 0); | |
599 | if (arg == endofnumber) | |
600 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
601 | if (*activep && *intptr == -1) | |
602 | *intptr = value; | |
603 | break; | |
604 | ||
605 | case oConnectionAttempts: | |
606 | intptr = &options->connection_attempts; | |
607 | goto parse_int; | |
608 | ||
609 | case oCipher: | |
610 | intptr = &options->cipher; | |
611 | arg = strdelim(&s); | |
612 | if (!arg || *arg == '\0') | |
613 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
614 | value = cipher_number(arg); | |
615 | if (value == -1) | |
616 | fatal("%.200s line %d: Bad cipher '%s'.", | |
e9702f7d | 617 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 618 | if (*activep && *intptr == -1) |
619 | *intptr = value; | |
620 | break; | |
621 | ||
622 | case oCiphers: | |
623 | arg = strdelim(&s); | |
624 | if (!arg || *arg == '\0') | |
625 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
626 | if (!ciphers_valid(arg)) | |
627 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", | |
e9702f7d | 628 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 629 | if (*activep && options->ciphers == NULL) |
630 | options->ciphers = xstrdup(arg); | |
631 | break; | |
632 | ||
633 | case oMacs: | |
634 | arg = strdelim(&s); | |
635 | if (!arg || *arg == '\0') | |
636 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
637 | if (!mac_valid(arg)) | |
638 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
e9702f7d | 639 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 640 | if (*activep && options->macs == NULL) |
641 | options->macs = xstrdup(arg); | |
642 | break; | |
643 | ||
644 | case oHostKeyAlgorithms: | |
645 | arg = strdelim(&s); | |
646 | if (!arg || *arg == '\0') | |
647 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
648 | if (!key_names_valid2(arg)) | |
649 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
e9702f7d | 650 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 651 | if (*activep && options->hostkeyalgorithms == NULL) |
652 | options->hostkeyalgorithms = xstrdup(arg); | |
653 | break; | |
654 | ||
655 | case oProtocol: | |
656 | intptr = &options->protocol; | |
657 | arg = strdelim(&s); | |
658 | if (!arg || *arg == '\0') | |
659 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
660 | value = proto_spec(arg); | |
661 | if (value == SSH_PROTO_UNKNOWN) | |
662 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
e9702f7d | 663 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 664 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
665 | *intptr = value; | |
666 | break; | |
667 | ||
668 | case oLogLevel: | |
669 | intptr = (int *) &options->log_level; | |
670 | arg = strdelim(&s); | |
671 | value = log_level_number(arg); | |
e9702f7d | 672 | if (value == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 673 | fatal("%.200s line %d: unsupported log level '%s'", |
e9702f7d | 674 | filename, linenum, arg ? arg : "<NONE>"); |
675 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) | |
3c0ef626 | 676 | *intptr = (LogLevel) value; |
677 | break; | |
678 | ||
679 | case oLocalForward: | |
680 | case oRemoteForward: | |
681 | arg = strdelim(&s); | |
dfddba3d | 682 | if (arg == NULL || *arg == '\0') |
3c0ef626 | 683 | fatal("%.200s line %d: Missing port argument.", |
684 | filename, linenum); | |
dfddba3d | 685 | arg2 = strdelim(&s); |
686 | if (arg2 == NULL || *arg2 == '\0') | |
687 | fatal("%.200s line %d: Missing target argument.", | |
3c0ef626 | 688 | filename, linenum); |
dfddba3d | 689 | |
690 | /* construct a string for parse_forward */ | |
691 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
692 | ||
693 | if (parse_forward(&fwd, fwdarg) == 0) | |
3c0ef626 | 694 | fatal("%.200s line %d: Bad forwarding specification.", |
695 | filename, linenum); | |
dfddba3d | 696 | |
3c0ef626 | 697 | if (*activep) { |
698 | if (opcode == oLocalForward) | |
dfddba3d | 699 | add_local_forward(options, &fwd); |
3c0ef626 | 700 | else if (opcode == oRemoteForward) |
dfddba3d | 701 | add_remote_forward(options, &fwd); |
3c0ef626 | 702 | } |
703 | break; | |
704 | ||
705 | case oDynamicForward: | |
706 | arg = strdelim(&s); | |
707 | if (!arg || *arg == '\0') | |
708 | fatal("%.200s line %d: Missing port argument.", | |
709 | filename, linenum); | |
dfddba3d | 710 | memset(&fwd, '\0', sizeof(fwd)); |
711 | fwd.connect_host = "socks"; | |
712 | fwd.listen_host = hpdelim(&arg); | |
713 | if (fwd.listen_host == NULL || | |
714 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
715 | fatal("%.200s line %d: Bad forwarding specification.", | |
716 | filename, linenum); | |
717 | if (arg) { | |
718 | fwd.listen_port = a2port(arg); | |
719 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
720 | } else { | |
721 | fwd.listen_port = a2port(fwd.listen_host); | |
2ce0bfe4 | 722 | fwd.listen_host = NULL; |
dfddba3d | 723 | } |
724 | if (fwd.listen_port == 0) | |
3c0ef626 | 725 | fatal("%.200s line %d: Badly formatted port number.", |
726 | filename, linenum); | |
727 | if (*activep) | |
dfddba3d | 728 | add_local_forward(options, &fwd); |
3c0ef626 | 729 | break; |
730 | ||
731 | case oClearAllForwardings: | |
732 | intptr = &options->clear_forwardings; | |
733 | goto parse_flag; | |
734 | ||
735 | case oHost: | |
736 | *activep = 0; | |
737 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') | |
738 | if (match_pattern(host, arg)) { | |
739 | debug("Applying options for %.100s", arg); | |
740 | *activep = 1; | |
741 | break; | |
742 | } | |
743 | /* Avoid garbage check below, as strdelim is done. */ | |
744 | return 0; | |
745 | ||
746 | case oEscapeChar: | |
747 | intptr = &options->escape_char; | |
748 | arg = strdelim(&s); | |
749 | if (!arg || *arg == '\0') | |
750 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
751 | if (arg[0] == '^' && arg[2] == 0 && | |
752 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) | |
753 | value = (u_char) arg[1] & 31; | |
754 | else if (strlen(arg) == 1) | |
755 | value = (u_char) arg[0]; | |
756 | else if (strcmp(arg, "none") == 0) | |
757 | value = SSH_ESCAPECHAR_NONE; | |
758 | else { | |
759 | fatal("%.200s line %d: Bad escape character.", | |
e9702f7d | 760 | filename, linenum); |
3c0ef626 | 761 | /* NOTREACHED */ |
762 | value = 0; /* Avoid compiler warning. */ | |
763 | } | |
764 | if (*activep && *intptr == -1) | |
765 | *intptr = value; | |
766 | break; | |
767 | ||
7cac2b65 | 768 | case oAddressFamily: |
769 | arg = strdelim(&s); | |
2ce0bfe4 | 770 | if (!arg || *arg == '\0') |
771 | fatal("%s line %d: missing address family.", | |
772 | filename, linenum); | |
7cac2b65 | 773 | intptr = &options->address_family; |
774 | if (strcasecmp(arg, "inet") == 0) | |
775 | value = AF_INET; | |
776 | else if (strcasecmp(arg, "inet6") == 0) | |
777 | value = AF_INET6; | |
778 | else if (strcasecmp(arg, "any") == 0) | |
779 | value = AF_UNSPEC; | |
780 | else | |
781 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
782 | if (*activep && *intptr == -1) | |
783 | *intptr = value; | |
784 | break; | |
785 | ||
bfe49944 | 786 | case oEnableSSHKeysign: |
787 | intptr = &options->enable_ssh_keysign; | |
788 | goto parse_flag; | |
789 | ||
12a403af | 790 | case oIdentitiesOnly: |
791 | intptr = &options->identities_only; | |
792 | goto parse_flag; | |
793 | ||
540d72c3 | 794 | case oServerAliveInterval: |
795 | intptr = &options->server_alive_interval; | |
796 | goto parse_time; | |
797 | ||
798 | case oServerAliveCountMax: | |
799 | intptr = &options->server_alive_count_max; | |
800 | goto parse_int; | |
801 | ||
7e82606e | 802 | case oSendEnv: |
803 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
804 | if (strchr(arg, '=') != NULL) | |
805 | fatal("%s line %d: Invalid environment name.", | |
806 | filename, linenum); | |
dfddba3d | 807 | if (!*activep) |
808 | continue; | |
7e82606e | 809 | if (options->num_send_env >= MAX_SEND_ENV) |
810 | fatal("%s line %d: too many send env.", | |
811 | filename, linenum); | |
812 | options->send_env[options->num_send_env++] = | |
813 | xstrdup(arg); | |
814 | } | |
815 | break; | |
816 | ||
817 | case oControlPath: | |
818 | charptr = &options->control_path; | |
819 | goto parse_string; | |
820 | ||
821 | case oControlMaster: | |
822 | intptr = &options->control_master; | |
2ce0bfe4 | 823 | arg = strdelim(&s); |
824 | if (!arg || *arg == '\0') | |
825 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
826 | filename, linenum); | |
827 | value = 0; /* To avoid compiler warning... */ | |
828 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
829 | value = SSHCTL_MASTER_YES; | |
830 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
831 | value = SSHCTL_MASTER_NO; | |
832 | else if (strcmp(arg, "auto") == 0) | |
833 | value = SSHCTL_MASTER_AUTO; | |
834 | else if (strcmp(arg, "ask") == 0) | |
835 | value = SSHCTL_MASTER_ASK; | |
836 | else if (strcmp(arg, "autoask") == 0) | |
837 | value = SSHCTL_MASTER_AUTO_ASK; | |
838 | else | |
839 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
840 | filename, linenum); | |
841 | if (*activep && *intptr == -1) | |
842 | *intptr = value; | |
843 | break; | |
7e82606e | 844 | |
dfddba3d | 845 | case oHashKnownHosts: |
846 | intptr = &options->hash_known_hosts; | |
847 | goto parse_flag; | |
848 | ||
08822d99 | 849 | case oTunnel: |
850 | intptr = &options->tun_open; | |
851 | arg = strdelim(&s); | |
852 | if (!arg || *arg == '\0') | |
853 | fatal("%s line %d: Missing yes/point-to-point/" | |
854 | "ethernet/no argument.", filename, linenum); | |
855 | value = 0; /* silence compiler */ | |
856 | if (strcasecmp(arg, "ethernet") == 0) | |
857 | value = SSH_TUNMODE_ETHERNET; | |
858 | else if (strcasecmp(arg, "point-to-point") == 0) | |
859 | value = SSH_TUNMODE_POINTOPOINT; | |
860 | else if (strcasecmp(arg, "yes") == 0) | |
861 | value = SSH_TUNMODE_DEFAULT; | |
862 | else if (strcasecmp(arg, "no") == 0) | |
863 | value = SSH_TUNMODE_NO; | |
864 | else | |
865 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
866 | "no argument: %s", filename, linenum, arg); | |
867 | if (*activep) | |
868 | *intptr = value; | |
869 | break; | |
870 | ||
871 | case oTunnelDevice: | |
872 | arg = strdelim(&s); | |
873 | if (!arg || *arg == '\0') | |
874 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
875 | value = a2tun(arg, &value2); | |
876 | if (value == SSH_TUNID_ERR) | |
877 | fatal("%.200s line %d: Bad tun device.", filename, linenum); | |
878 | if (*activep) { | |
879 | options->tun_local = value; | |
880 | options->tun_remote = value2; | |
881 | } | |
882 | break; | |
883 | ||
884 | case oLocalCommand: | |
885 | charptr = &options->local_command; | |
886 | goto parse_command; | |
887 | ||
888 | case oPermitLocalCommand: | |
889 | intptr = &options->permit_local_command; | |
890 | goto parse_flag; | |
891 | ||
44a053a3 | 892 | case oDeprecated: |
893 | debug("%s line %d: Deprecated option \"%s\"", | |
894 | filename, linenum, keyword); | |
895 | return 0; | |
896 | ||
7cac2b65 | 897 | case oUnsupported: |
898 | error("%s line %d: Unsupported option \"%s\"", | |
899 | filename, linenum, keyword); | |
900 | return 0; | |
901 | ||
3c0ef626 | 902 | default: |
903 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
904 | } | |
905 | ||
906 | /* Check that there is no garbage at end of line. */ | |
907 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
908 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
2ce0bfe4 | 909 | filename, linenum, arg); |
3c0ef626 | 910 | } |
911 | return 0; | |
912 | } | |
913 | ||
914 | ||
915 | /* | |
916 | * Reads the config file and modifies the options accordingly. Options | |
917 | * should already be initialized before this call. This never returns if | |
918 | * there is an error. If the file does not exist, this returns 0. | |
919 | */ | |
920 | ||
921 | int | |
7e82606e | 922 | read_config_file(const char *filename, const char *host, Options *options, |
923 | int checkperm) | |
3c0ef626 | 924 | { |
925 | FILE *f; | |
926 | char line[1024]; | |
927 | int active, linenum; | |
928 | int bad_options = 0; | |
929 | ||
930 | /* Open the file. */ | |
7e82606e | 931 | if ((f = fopen(filename, "r")) == NULL) |
3c0ef626 | 932 | return 0; |
933 | ||
7e82606e | 934 | if (checkperm) { |
935 | struct stat sb; | |
936 | ||
937 | if (fstat(fileno(f), &sb) == -1) | |
938 | fatal("fstat %s: %s", filename, strerror(errno)); | |
939 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || | |
940 | (sb.st_mode & 022) != 0)) | |
941 | fatal("Bad owner or permissions on %s", filename); | |
942 | } | |
943 | ||
3c0ef626 | 944 | debug("Reading configuration data %.200s", filename); |
945 | ||
946 | /* | |
947 | * Mark that we are now processing the options. This flag is turned | |
948 | * on/off by Host specifications. | |
949 | */ | |
950 | active = 1; | |
951 | linenum = 0; | |
952 | while (fgets(line, sizeof(line), f)) { | |
953 | /* Update line number counter. */ | |
954 | linenum++; | |
955 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
956 | bad_options++; | |
957 | } | |
958 | fclose(f); | |
959 | if (bad_options > 0) | |
960 | fatal("%s: terminating, %d bad configuration options", | |
e9702f7d | 961 | filename, bad_options); |
3c0ef626 | 962 | return 1; |
963 | } | |
964 | ||
965 | /* | |
966 | * Initializes options to special values that indicate that they have not yet | |
967 | * been set. Read_config_file will only set options with this value. Options | |
968 | * are processed in the following order: command line, user config file, | |
969 | * system config file. Last, fill_default_options is called. | |
970 | */ | |
971 | ||
972 | void | |
973 | initialize_options(Options * options) | |
974 | { | |
975 | memset(options, 'X', sizeof(*options)); | |
976 | options->forward_agent = -1; | |
977 | options->forward_x11 = -1; | |
540d72c3 | 978 | options->forward_x11_trusted = -1; |
3c0ef626 | 979 | options->xauth_location = NULL; |
980 | options->gateway_ports = -1; | |
981 | options->use_privileged_port = -1; | |
3c0ef626 | 982 | options->rsa_authentication = -1; |
983 | options->pubkey_authentication = -1; | |
984 | options->challenge_response_authentication = -1; | |
7cac2b65 | 985 | options->gss_authentication = -1; |
7a056ed1 | 986 | options->gss_keyex = -1; |
7cac2b65 | 987 | options->gss_deleg_creds = -1; |
fe4ad273 | 988 | options->gss_trust_dns = -1; |
3c0ef626 | 989 | options->password_authentication = -1; |
990 | options->kbd_interactive_authentication = -1; | |
991 | options->kbd_interactive_devices = NULL; | |
992 | options->rhosts_rsa_authentication = -1; | |
993 | options->hostbased_authentication = -1; | |
3c0ef626 | 994 | options->batch_mode = -1; |
995 | options->check_host_ip = -1; | |
996 | options->strict_host_key_checking = -1; | |
997 | options->compression = -1; | |
540d72c3 | 998 | options->tcp_keep_alive = -1; |
3c0ef626 | 999 | options->compression_level = -1; |
1000 | options->port = -1; | |
7cac2b65 | 1001 | options->address_family = -1; |
3c0ef626 | 1002 | options->connection_attempts = -1; |
7cac2b65 | 1003 | options->connection_timeout = -1; |
3c0ef626 | 1004 | options->number_of_password_prompts = -1; |
1005 | options->cipher = -1; | |
1006 | options->ciphers = NULL; | |
1007 | options->macs = NULL; | |
1008 | options->hostkeyalgorithms = NULL; | |
1009 | options->protocol = SSH_PROTO_UNKNOWN; | |
1010 | options->num_identity_files = 0; | |
1011 | options->hostname = NULL; | |
1012 | options->host_key_alias = NULL; | |
1013 | options->proxy_command = NULL; | |
1014 | options->user = NULL; | |
1015 | options->escape_char = -1; | |
1016 | options->system_hostfile = NULL; | |
1017 | options->user_hostfile = NULL; | |
1018 | options->system_hostfile2 = NULL; | |
1019 | options->user_hostfile2 = NULL; | |
1020 | options->num_local_forwards = 0; | |
1021 | options->num_remote_forwards = 0; | |
1022 | options->clear_forwardings = -1; | |
e9702f7d | 1023 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
3c0ef626 | 1024 | options->preferred_authentications = NULL; |
1025 | options->bind_address = NULL; | |
1026 | options->smartcard_device = NULL; | |
bfe49944 | 1027 | options->enable_ssh_keysign = - 1; |
3c0ef626 | 1028 | options->no_host_authentication_for_localhost = - 1; |
12a403af | 1029 | options->identities_only = - 1; |
7cac2b65 | 1030 | options->rekey_limit = - 1; |
1031 | options->verify_host_key_dns = -1; | |
540d72c3 | 1032 | options->server_alive_interval = -1; |
1033 | options->server_alive_count_max = -1; | |
473db5ab | 1034 | options->none_switch = -1; |
7e82606e | 1035 | options->num_send_env = 0; |
1036 | options->control_path = NULL; | |
1037 | options->control_master = -1; | |
dfddba3d | 1038 | options->hash_known_hosts = -1; |
08822d99 | 1039 | options->tun_open = -1; |
1040 | options->tun_local = -1; | |
1041 | options->tun_remote = -1; | |
1042 | options->local_command = NULL; | |
1043 | options->permit_local_command = -1; | |
3c0ef626 | 1044 | } |
1045 | ||
1046 | /* | |
1047 | * Called after processing other sources of option data, this fills those | |
1048 | * options for which no value has been specified with their default values. | |
1049 | */ | |
1050 | ||
1051 | void | |
1052 | fill_default_options(Options * options) | |
1053 | { | |
1054 | int len; | |
1055 | ||
1056 | if (options->forward_agent == -1) | |
1057 | options->forward_agent = 0; | |
1058 | if (options->forward_x11 == -1) | |
1059 | options->forward_x11 = 0; | |
540d72c3 | 1060 | if (options->forward_x11_trusted == -1) |
1061 | options->forward_x11_trusted = 0; | |
3c0ef626 | 1062 | if (options->xauth_location == NULL) |
1063 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 1064 | if (options->gateway_ports == -1) |
1065 | options->gateway_ports = 0; | |
1066 | if (options->use_privileged_port == -1) | |
1067 | options->use_privileged_port = 0; | |
3c0ef626 | 1068 | if (options->rsa_authentication == -1) |
1069 | options->rsa_authentication = 1; | |
1070 | if (options->pubkey_authentication == -1) | |
1071 | options->pubkey_authentication = 1; | |
1072 | if (options->challenge_response_authentication == -1) | |
1073 | options->challenge_response_authentication = 1; | |
5598e598 | 1074 | if (options->gss_authentication == -1) |
1075 | options->gss_authentication = 1; | |
7a056ed1 | 1076 | if (options->gss_keyex == -1) |
1077 | options->gss_keyex = 1; | |
5598e598 | 1078 | if (options->gss_deleg_creds == -1) |
1079 | options->gss_deleg_creds = 1; | |
fe4ad273 | 1080 | if (options->gss_trust_dns == -1) |
1081 | options->gss_trust_dns = 1; | |
3c0ef626 | 1082 | if (options->password_authentication == -1) |
1083 | options->password_authentication = 1; | |
1084 | if (options->kbd_interactive_authentication == -1) | |
1085 | options->kbd_interactive_authentication = 1; | |
1086 | if (options->rhosts_rsa_authentication == -1) | |
44a053a3 | 1087 | options->rhosts_rsa_authentication = 0; |
3c0ef626 | 1088 | if (options->hostbased_authentication == -1) |
1089 | options->hostbased_authentication = 0; | |
3c0ef626 | 1090 | if (options->batch_mode == -1) |
1091 | options->batch_mode = 0; | |
1092 | if (options->check_host_ip == -1) | |
1093 | options->check_host_ip = 1; | |
1094 | if (options->strict_host_key_checking == -1) | |
1095 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1096 | if (options->compression == -1) | |
1097 | options->compression = 0; | |
540d72c3 | 1098 | if (options->tcp_keep_alive == -1) |
1099 | options->tcp_keep_alive = 1; | |
3c0ef626 | 1100 | if (options->compression_level == -1) |
1101 | options->compression_level = 6; | |
1102 | if (options->port == -1) | |
1103 | options->port = 0; /* Filled in ssh_connect. */ | |
7cac2b65 | 1104 | if (options->address_family == -1) |
1105 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 1106 | if (options->connection_attempts == -1) |
1107 | options->connection_attempts = 1; | |
1108 | if (options->number_of_password_prompts == -1) | |
1109 | options->number_of_password_prompts = 3; | |
1110 | /* Selected in ssh_login(). */ | |
1111 | if (options->cipher == -1) | |
1112 | options->cipher = SSH_CIPHER_NOT_SET; | |
1113 | /* options->ciphers, default set in myproposals.h */ | |
1114 | /* options->macs, default set in myproposals.h */ | |
1115 | /* options->hostkeyalgorithms, default set in myproposals.h */ | |
1116 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
1117 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
1118 | if (options->num_identity_files == 0) { | |
1119 | if (options->protocol & SSH_PROTO_1) { | |
1120 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; | |
1121 | options->identity_files[options->num_identity_files] = | |
1122 | xmalloc(len); | |
1123 | snprintf(options->identity_files[options->num_identity_files++], | |
1124 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
1125 | } | |
1126 | if (options->protocol & SSH_PROTO_2) { | |
1127 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; | |
1128 | options->identity_files[options->num_identity_files] = | |
1129 | xmalloc(len); | |
1130 | snprintf(options->identity_files[options->num_identity_files++], | |
1131 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1132 | ||
1133 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; | |
1134 | options->identity_files[options->num_identity_files] = | |
1135 | xmalloc(len); | |
1136 | snprintf(options->identity_files[options->num_identity_files++], | |
1137 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
1138 | } | |
1139 | } | |
1140 | if (options->escape_char == -1) | |
1141 | options->escape_char = '~'; | |
1142 | if (options->system_hostfile == NULL) | |
1143 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; | |
1144 | if (options->user_hostfile == NULL) | |
1145 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; | |
1146 | if (options->system_hostfile2 == NULL) | |
1147 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; | |
1148 | if (options->user_hostfile2 == NULL) | |
1149 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; | |
e9702f7d | 1150 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 1151 | options->log_level = SYSLOG_LEVEL_INFO; |
1152 | if (options->clear_forwardings == 1) | |
1153 | clear_forwardings(options); | |
1154 | if (options->no_host_authentication_for_localhost == - 1) | |
1155 | options->no_host_authentication_for_localhost = 0; | |
12a403af | 1156 | if (options->identities_only == -1) |
1157 | options->identities_only = 0; | |
bfe49944 | 1158 | if (options->enable_ssh_keysign == -1) |
1159 | options->enable_ssh_keysign = 0; | |
7cac2b65 | 1160 | if (options->rekey_limit == -1) |
1161 | options->rekey_limit = 0; | |
1162 | if (options->verify_host_key_dns == -1) | |
1163 | options->verify_host_key_dns = 0; | |
540d72c3 | 1164 | if (options->server_alive_interval == -1) |
1165 | options->server_alive_interval = 0; | |
1166 | if (options->server_alive_count_max == -1) | |
1167 | options->server_alive_count_max = 3; | |
473db5ab | 1168 | if (options->none_switch == -1) |
1169 | options->none_switch = 0; | |
7e82606e | 1170 | if (options->control_master == -1) |
1171 | options->control_master = 0; | |
dfddba3d | 1172 | if (options->hash_known_hosts == -1) |
1173 | options->hash_known_hosts = 0; | |
08822d99 | 1174 | if (options->tun_open == -1) |
1175 | options->tun_open = SSH_TUNMODE_NO; | |
1176 | if (options->tun_local == -1) | |
1177 | options->tun_local = SSH_TUNID_ANY; | |
1178 | if (options->tun_remote == -1) | |
1179 | options->tun_remote = SSH_TUNID_ANY; | |
1180 | if (options->permit_local_command == -1) | |
1181 | options->permit_local_command = 0; | |
1182 | /* options->local_command should not be set by default */ | |
3c0ef626 | 1183 | /* options->proxy_command should not be set by default */ |
1184 | /* options->user will be set in the main program if appropriate */ | |
1185 | /* options->hostname will be set in the main program if appropriate */ | |
1186 | /* options->host_key_alias should not be set by default */ | |
1187 | /* options->preferred_authentications will be set in ssh */ | |
1188 | } | |
dfddba3d | 1189 | |
1190 | /* | |
1191 | * parse_forward | |
1192 | * parses a string containing a port forwarding specification of the form: | |
1193 | * [listenhost:]listenport:connecthost:connectport | |
1194 | * returns number of arguments parsed or zero on error | |
1195 | */ | |
1196 | int | |
1197 | parse_forward(Forward *fwd, const char *fwdspec) | |
1198 | { | |
1199 | int i; | |
1200 | char *p, *cp, *fwdarg[4]; | |
1201 | ||
1202 | memset(fwd, '\0', sizeof(*fwd)); | |
1203 | ||
1204 | cp = p = xstrdup(fwdspec); | |
1205 | ||
1206 | /* skip leading spaces */ | |
1207 | while (*cp && isspace(*cp)) | |
1208 | cp++; | |
1209 | ||
1210 | for (i = 0; i < 4; ++i) | |
1211 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1212 | break; | |
1213 | ||
1214 | /* Check for trailing garbage in 4-arg case*/ | |
1215 | if (cp != NULL) | |
1216 | i = 0; /* failure */ | |
1217 | ||
1218 | switch (i) { | |
1219 | case 3: | |
1220 | fwd->listen_host = NULL; | |
1221 | fwd->listen_port = a2port(fwdarg[0]); | |
1222 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1223 | fwd->connect_port = a2port(fwdarg[2]); | |
1224 | break; | |
1225 | ||
1226 | case 4: | |
1227 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1228 | fwd->listen_port = a2port(fwdarg[1]); | |
1229 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1230 | fwd->connect_port = a2port(fwdarg[3]); | |
1231 | break; | |
1232 | default: | |
1233 | i = 0; /* failure */ | |
1234 | } | |
1235 | ||
1236 | xfree(p); | |
1237 | ||
1238 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1239 | goto fail_free; | |
1240 | ||
1241 | if (fwd->connect_host != NULL && | |
1242 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1243 | goto fail_free; | |
1244 | ||
1245 | return (i); | |
1246 | ||
1247 | fail_free: | |
1248 | if (fwd->connect_host != NULL) | |
1249 | xfree(fwd->connect_host); | |
1250 | if (fwd->listen_host != NULL) | |
1251 | xfree(fwd->listen_host); | |
1252 | return (0); | |
1253 | } |