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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" | |
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, |
f472818d | 111 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
112 | oGssKeyEx, | |
fe4ad273 | 113 | oGssTrustDns, |
12a403af | 114 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
dfddba3d | 115 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
08822d99 | 116 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
7cac2b65 | 117 | oDeprecated, oUnsupported |
3c0ef626 | 118 | } OpCodes; |
119 | ||
120 | /* Textual representations of the tokens. */ | |
121 | ||
122 | static struct { | |
123 | const char *name; | |
124 | OpCodes opcode; | |
125 | } keywords[] = { | |
126 | { "forwardagent", oForwardAgent }, | |
127 | { "forwardx11", oForwardX11 }, | |
540d72c3 | 128 | { "forwardx11trusted", oForwardX11Trusted }, |
3c0ef626 | 129 | { "xauthlocation", oXAuthLocation }, |
130 | { "gatewayports", oGatewayPorts }, | |
131 | { "useprivilegedport", oUsePrivilegedPort }, | |
7cac2b65 | 132 | { "rhostsauthentication", oDeprecated }, |
3c0ef626 | 133 | { "passwordauthentication", oPasswordAuthentication }, |
134 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, | |
135 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
136 | { "rsaauthentication", oRSAAuthentication }, | |
137 | { "pubkeyauthentication", oPubkeyAuthentication }, | |
138 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ | |
139 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
140 | { "hostbasedauthentication", oHostbasedAuthentication }, | |
141 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, | |
142 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
143 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
7cac2b65 | 144 | { "kerberosauthentication", oUnsupported }, |
145 | { "kerberostgtpassing", oUnsupported }, | |
146 | { "afstokenpassing", oUnsupported }, | |
147 | #if defined(GSSAPI) | |
5598e598 | 148 | { "gssapiauthentication", oGssAuthentication }, |
7a056ed1 | 149 | { "gssapikeyexchange", oGssKeyEx }, |
5598e598 | 150 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
fe4ad273 | 151 | { "gssapitrustdns", oGssTrustDns }, |
7cac2b65 | 152 | #else |
153 | { "gssapiauthentication", oUnsupported }, | |
154 | { "gssapikeyexchange", oUnsupported }, | |
155 | { "gssapidelegatecredentials", oUnsupported }, | |
fe4ad273 | 156 | { "gssapitrustdns", oUnsupported }, |
3c0ef626 | 157 | #endif |
44a053a3 | 158 | { "fallbacktorsh", oDeprecated }, |
159 | { "usersh", oDeprecated }, | |
3c0ef626 | 160 | { "identityfile", oIdentityFile }, |
161 | { "identityfile2", oIdentityFile }, /* alias */ | |
12a403af | 162 | { "identitiesonly", oIdentitiesOnly }, |
3c0ef626 | 163 | { "hostname", oHostName }, |
164 | { "hostkeyalias", oHostKeyAlias }, | |
165 | { "proxycommand", oProxyCommand }, | |
166 | { "port", oPort }, | |
167 | { "cipher", oCipher }, | |
168 | { "ciphers", oCiphers }, | |
169 | { "macs", oMacs }, | |
170 | { "protocol", oProtocol }, | |
171 | { "remoteforward", oRemoteForward }, | |
172 | { "localforward", oLocalForward }, | |
173 | { "user", oUser }, | |
174 | { "host", oHost }, | |
175 | { "escapechar", oEscapeChar }, | |
176 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
177 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ | |
178 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, | |
179 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ | |
180 | { "connectionattempts", oConnectionAttempts }, | |
181 | { "batchmode", oBatchMode }, | |
182 | { "checkhostip", oCheckHostIP }, | |
183 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
184 | { "compression", oCompression }, | |
185 | { "compressionlevel", oCompressionLevel }, | |
540d72c3 | 186 | { "tcpkeepalive", oTCPKeepAlive }, |
187 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
3c0ef626 | 188 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
189 | { "loglevel", oLogLevel }, | |
190 | { "dynamicforward", oDynamicForward }, | |
191 | { "preferredauthentications", oPreferredAuthentications }, | |
192 | { "hostkeyalgorithms", oHostKeyAlgorithms }, | |
193 | { "bindaddress", oBindAddress }, | |
7cac2b65 | 194 | #ifdef SMARTCARD |
3c0ef626 | 195 | { "smartcarddevice", oSmartcardDevice }, |
7cac2b65 | 196 | #else |
197 | { "smartcarddevice", oUnsupported }, | |
198 | #endif | |
e9702f7d | 199 | { "clearallforwardings", oClearAllForwardings }, |
bfe49944 | 200 | { "enablesshkeysign", oEnableSSHKeysign }, |
7cac2b65 | 201 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
e9702f7d | 202 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
7cac2b65 | 203 | { "rekeylimit", oRekeyLimit }, |
204 | { "connecttimeout", oConnectTimeout }, | |
205 | { "addressfamily", oAddressFamily }, | |
540d72c3 | 206 | { "serveraliveinterval", oServerAliveInterval }, |
207 | { "serveralivecountmax", oServerAliveCountMax }, | |
7e82606e | 208 | { "sendenv", oSendEnv }, |
209 | { "controlpath", oControlPath }, | |
210 | { "controlmaster", oControlMaster }, | |
dfddba3d | 211 | { "hashknownhosts", oHashKnownHosts }, |
08822d99 | 212 | { "tunnel", oTunnel }, |
213 | { "tunneldevice", oTunnelDevice }, | |
214 | { "localcommand", oLocalCommand }, | |
215 | { "permitlocalcommand", oPermitLocalCommand }, | |
e9702f7d | 216 | { NULL, oBadOption } |
3c0ef626 | 217 | }; |
218 | ||
219 | /* | |
220 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
221 | * error. | |
222 | */ | |
223 | ||
224 | void | |
dfddba3d | 225 | add_local_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 226 | { |
227 | Forward *fwd; | |
d03f4262 | 228 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
3c0ef626 | 229 | extern uid_t original_real_uid; |
dfddba3d | 230 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
3c0ef626 | 231 | fatal("Privileged ports can only be forwarded by root."); |
232 | #endif | |
233 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
234 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
235 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
dfddba3d | 236 | |
237 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
238 | NULL : xstrdup(newfwd->listen_host); | |
239 | fwd->listen_port = newfwd->listen_port; | |
240 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
241 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 242 | } |
243 | ||
244 | /* | |
245 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
246 | * an error. | |
247 | */ | |
248 | ||
249 | void | |
dfddba3d | 250 | add_remote_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 251 | { |
252 | Forward *fwd; | |
253 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
254 | fatal("Too many remote forwards (max %d).", | |
e9702f7d | 255 | SSH_MAX_FORWARDS_PER_DIRECTION); |
3c0ef626 | 256 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
dfddba3d | 257 | |
258 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
259 | NULL : xstrdup(newfwd->listen_host); | |
260 | fwd->listen_port = newfwd->listen_port; | |
261 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
262 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 263 | } |
264 | ||
265 | static void | |
266 | clear_forwardings(Options *options) | |
267 | { | |
268 | int i; | |
269 | ||
dfddba3d | 270 | for (i = 0; i < options->num_local_forwards; i++) { |
8b32eddc | 271 | if (options->local_forwards[i].listen_host != NULL) |
272 | xfree(options->local_forwards[i].listen_host); | |
dfddba3d | 273 | xfree(options->local_forwards[i].connect_host); |
274 | } | |
3c0ef626 | 275 | options->num_local_forwards = 0; |
dfddba3d | 276 | for (i = 0; i < options->num_remote_forwards; i++) { |
8b32eddc | 277 | if (options->remote_forwards[i].listen_host != NULL) |
278 | xfree(options->remote_forwards[i].listen_host); | |
dfddba3d | 279 | xfree(options->remote_forwards[i].connect_host); |
280 | } | |
3c0ef626 | 281 | options->num_remote_forwards = 0; |
08822d99 | 282 | options->tun_open = SSH_TUNMODE_NO; |
3c0ef626 | 283 | } |
284 | ||
285 | /* | |
286 | * Returns the number of the token pointed to by cp or oBadOption. | |
287 | */ | |
288 | ||
289 | static OpCodes | |
290 | parse_token(const char *cp, const char *filename, int linenum) | |
291 | { | |
292 | u_int i; | |
293 | ||
294 | for (i = 0; keywords[i].name; i++) | |
295 | if (strcasecmp(cp, keywords[i].name) == 0) | |
296 | return keywords[i].opcode; | |
297 | ||
298 | error("%s: line %d: Bad configuration option: %s", | |
299 | filename, linenum, cp); | |
300 | return oBadOption; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Processes a single option line as used in the configuration files. This | |
305 | * only sets those values that have not already been set. | |
306 | */ | |
bfe49944 | 307 | #define WHITESPACE " \t\r\n" |
3c0ef626 | 308 | |
309 | int | |
310 | process_config_line(Options *options, const char *host, | |
311 | char *line, const char *filename, int linenum, | |
312 | int *activep) | |
313 | { | |
dfddba3d | 314 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
08822d99 | 315 | int opcode, *intptr, value, value2; |
bfe49944 | 316 | size_t len; |
dfddba3d | 317 | Forward fwd; |
3c0ef626 | 318 | |
7cac2b65 | 319 | /* Strip trailing whitespace */ |
8b32eddc | 320 | for (len = strlen(line) - 1; len > 0; len--) { |
7cac2b65 | 321 | if (strchr(WHITESPACE, line[len]) == NULL) |
322 | break; | |
323 | line[len] = '\0'; | |
324 | } | |
325 | ||
3c0ef626 | 326 | s = line; |
327 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
328 | keyword = strdelim(&s); | |
329 | /* Ignore leading whitespace. */ | |
330 | if (*keyword == '\0') | |
331 | keyword = strdelim(&s); | |
332 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') | |
333 | return 0; | |
334 | ||
335 | opcode = parse_token(keyword, filename, linenum); | |
336 | ||
337 | switch (opcode) { | |
338 | case oBadOption: | |
339 | /* don't panic, but count bad options */ | |
340 | return -1; | |
341 | /* NOTREACHED */ | |
7cac2b65 | 342 | case oConnectTimeout: |
343 | intptr = &options->connection_timeout; | |
540d72c3 | 344 | parse_time: |
7cac2b65 | 345 | arg = strdelim(&s); |
346 | if (!arg || *arg == '\0') | |
347 | fatal("%s line %d: missing time value.", | |
348 | filename, linenum); | |
349 | if ((value = convtime(arg)) == -1) | |
350 | fatal("%s line %d: invalid time value.", | |
351 | filename, linenum); | |
352 | if (*intptr == -1) | |
353 | *intptr = value; | |
354 | break; | |
355 | ||
3c0ef626 | 356 | case oForwardAgent: |
357 | intptr = &options->forward_agent; | |
358 | parse_flag: | |
359 | arg = strdelim(&s); | |
360 | if (!arg || *arg == '\0') | |
361 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
362 | value = 0; /* To avoid compiler warning... */ | |
363 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
364 | value = 1; | |
365 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
366 | value = 0; | |
367 | else | |
368 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
369 | if (*activep && *intptr == -1) | |
370 | *intptr = value; | |
371 | break; | |
372 | ||
373 | case oForwardX11: | |
374 | intptr = &options->forward_x11; | |
375 | goto parse_flag; | |
376 | ||
540d72c3 | 377 | case oForwardX11Trusted: |
378 | intptr = &options->forward_x11_trusted; | |
379 | goto parse_flag; | |
380 | ||
3c0ef626 | 381 | case oGatewayPorts: |
382 | intptr = &options->gateway_ports; | |
383 | goto parse_flag; | |
384 | ||
385 | case oUsePrivilegedPort: | |
386 | intptr = &options->use_privileged_port; | |
387 | goto parse_flag; | |
388 | ||
3c0ef626 | 389 | case oPasswordAuthentication: |
390 | intptr = &options->password_authentication; | |
391 | goto parse_flag; | |
392 | ||
393 | case oKbdInteractiveAuthentication: | |
394 | intptr = &options->kbd_interactive_authentication; | |
395 | goto parse_flag; | |
396 | ||
397 | case oKbdInteractiveDevices: | |
398 | charptr = &options->kbd_interactive_devices; | |
399 | goto parse_string; | |
400 | ||
401 | case oPubkeyAuthentication: | |
402 | intptr = &options->pubkey_authentication; | |
403 | goto parse_flag; | |
404 | ||
405 | case oRSAAuthentication: | |
406 | intptr = &options->rsa_authentication; | |
407 | goto parse_flag; | |
408 | ||
409 | case oRhostsRSAAuthentication: | |
410 | intptr = &options->rhosts_rsa_authentication; | |
411 | goto parse_flag; | |
412 | ||
413 | case oHostbasedAuthentication: | |
414 | intptr = &options->hostbased_authentication; | |
415 | goto parse_flag; | |
416 | ||
417 | case oChallengeResponseAuthentication: | |
418 | intptr = &options->challenge_response_authentication; | |
419 | goto parse_flag; | |
7cac2b65 | 420 | |
5598e598 | 421 | case oGssAuthentication: |
422 | intptr = &options->gss_authentication; | |
423 | goto parse_flag; | |
7cac2b65 | 424 | |
7a056ed1 | 425 | case oGssKeyEx: |
426 | intptr = &options->gss_keyex; | |
427 | goto parse_flag; | |
428 | ||
5598e598 | 429 | case oGssDelegateCreds: |
430 | intptr = &options->gss_deleg_creds; | |
431 | goto parse_flag; | |
5598e598 | 432 | |
fe4ad273 | 433 | case oGssTrustDns: |
434 | intptr = &options->gss_trust_dns; | |
435 | goto parse_flag; | |
436 | ||
3c0ef626 | 437 | case oBatchMode: |
438 | intptr = &options->batch_mode; | |
439 | goto parse_flag; | |
440 | ||
441 | case oCheckHostIP: | |
442 | intptr = &options->check_host_ip; | |
443 | goto parse_flag; | |
444 | ||
7cac2b65 | 445 | case oVerifyHostKeyDNS: |
446 | intptr = &options->verify_host_key_dns; | |
540d72c3 | 447 | goto parse_yesnoask; |
7cac2b65 | 448 | |
3c0ef626 | 449 | case oStrictHostKeyChecking: |
450 | intptr = &options->strict_host_key_checking; | |
540d72c3 | 451 | parse_yesnoask: |
3c0ef626 | 452 | arg = strdelim(&s); |
453 | if (!arg || *arg == '\0') | |
454 | fatal("%.200s line %d: Missing yes/no/ask argument.", | |
e9702f7d | 455 | filename, linenum); |
3c0ef626 | 456 | value = 0; /* To avoid compiler warning... */ |
457 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
458 | value = 1; | |
459 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
460 | value = 0; | |
461 | else if (strcmp(arg, "ask") == 0) | |
462 | value = 2; | |
463 | else | |
464 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
465 | if (*activep && *intptr == -1) | |
466 | *intptr = value; | |
467 | break; | |
468 | ||
469 | case oCompression: | |
470 | intptr = &options->compression; | |
471 | goto parse_flag; | |
472 | ||
540d72c3 | 473 | case oTCPKeepAlive: |
474 | intptr = &options->tcp_keep_alive; | |
3c0ef626 | 475 | goto parse_flag; |
476 | ||
477 | case oNoHostAuthenticationForLocalhost: | |
478 | intptr = &options->no_host_authentication_for_localhost; | |
479 | goto parse_flag; | |
480 | ||
481 | case oNumberOfPasswordPrompts: | |
482 | intptr = &options->number_of_password_prompts; | |
483 | goto parse_int; | |
484 | ||
485 | case oCompressionLevel: | |
486 | intptr = &options->compression_level; | |
487 | goto parse_int; | |
488 | ||
7cac2b65 | 489 | case oRekeyLimit: |
490 | intptr = &options->rekey_limit; | |
491 | arg = strdelim(&s); | |
492 | if (!arg || *arg == '\0') | |
493 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
494 | if (arg[0] < '0' || arg[0] > '9') | |
495 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
496 | value = strtol(arg, &endofnumber, 10); | |
497 | if (arg == endofnumber) | |
498 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
499 | switch (toupper(*endofnumber)) { | |
500 | case 'K': | |
501 | value *= 1<<10; | |
502 | break; | |
503 | case 'M': | |
504 | value *= 1<<20; | |
505 | break; | |
506 | case 'G': | |
507 | value *= 1<<30; | |
508 | break; | |
509 | } | |
510 | if (*activep && *intptr == -1) | |
511 | *intptr = value; | |
512 | break; | |
513 | ||
3c0ef626 | 514 | case oIdentityFile: |
515 | arg = strdelim(&s); | |
516 | if (!arg || *arg == '\0') | |
517 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
518 | if (*activep) { | |
519 | intptr = &options->num_identity_files; | |
520 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
521 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
e9702f7d | 522 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
3c0ef626 | 523 | charptr = &options->identity_files[*intptr]; |
524 | *charptr = xstrdup(arg); | |
525 | *intptr = *intptr + 1; | |
526 | } | |
527 | break; | |
528 | ||
529 | case oXAuthLocation: | |
530 | charptr=&options->xauth_location; | |
531 | goto parse_string; | |
532 | ||
533 | case oUser: | |
534 | charptr = &options->user; | |
535 | parse_string: | |
536 | arg = strdelim(&s); | |
537 | if (!arg || *arg == '\0') | |
538 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
539 | if (*activep && *charptr == NULL) | |
540 | *charptr = xstrdup(arg); | |
541 | break; | |
542 | ||
543 | case oGlobalKnownHostsFile: | |
544 | charptr = &options->system_hostfile; | |
545 | goto parse_string; | |
546 | ||
547 | case oUserKnownHostsFile: | |
548 | charptr = &options->user_hostfile; | |
549 | goto parse_string; | |
550 | ||
551 | case oGlobalKnownHostsFile2: | |
552 | charptr = &options->system_hostfile2; | |
553 | goto parse_string; | |
554 | ||
555 | case oUserKnownHostsFile2: | |
556 | charptr = &options->user_hostfile2; | |
557 | goto parse_string; | |
558 | ||
559 | case oHostName: | |
560 | charptr = &options->hostname; | |
561 | goto parse_string; | |
562 | ||
563 | case oHostKeyAlias: | |
564 | charptr = &options->host_key_alias; | |
565 | goto parse_string; | |
566 | ||
567 | case oPreferredAuthentications: | |
568 | charptr = &options->preferred_authentications; | |
569 | goto parse_string; | |
570 | ||
571 | case oBindAddress: | |
572 | charptr = &options->bind_address; | |
573 | goto parse_string; | |
574 | ||
575 | case oSmartcardDevice: | |
576 | charptr = &options->smartcard_device; | |
577 | goto parse_string; | |
578 | ||
579 | case oProxyCommand: | |
08822d99 | 580 | charptr = &options->proxy_command; |
581 | parse_command: | |
7cac2b65 | 582 | if (s == NULL) |
583 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
bfe49944 | 584 | len = strspn(s, WHITESPACE "="); |
3c0ef626 | 585 | if (*activep && *charptr == NULL) |
bfe49944 | 586 | *charptr = xstrdup(s + len); |
3c0ef626 | 587 | return 0; |
588 | ||
589 | case oPort: | |
590 | intptr = &options->port; | |
591 | parse_int: | |
592 | arg = strdelim(&s); | |
593 | if (!arg || *arg == '\0') | |
594 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
595 | if (arg[0] < '0' || arg[0] > '9') | |
596 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
597 | ||
598 | /* Octal, decimal, or hex format? */ | |
599 | value = strtol(arg, &endofnumber, 0); | |
600 | if (arg == endofnumber) | |
601 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
602 | if (*activep && *intptr == -1) | |
603 | *intptr = value; | |
604 | break; | |
605 | ||
606 | case oConnectionAttempts: | |
607 | intptr = &options->connection_attempts; | |
608 | goto parse_int; | |
609 | ||
610 | case oCipher: | |
611 | intptr = &options->cipher; | |
612 | arg = strdelim(&s); | |
613 | if (!arg || *arg == '\0') | |
614 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
615 | value = cipher_number(arg); | |
616 | if (value == -1) | |
617 | fatal("%.200s line %d: Bad cipher '%s'.", | |
e9702f7d | 618 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 619 | if (*activep && *intptr == -1) |
620 | *intptr = value; | |
621 | break; | |
622 | ||
623 | case oCiphers: | |
624 | arg = strdelim(&s); | |
625 | if (!arg || *arg == '\0') | |
626 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
627 | if (!ciphers_valid(arg)) | |
628 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", | |
e9702f7d | 629 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 630 | if (*activep && options->ciphers == NULL) |
631 | options->ciphers = xstrdup(arg); | |
632 | break; | |
633 | ||
634 | case oMacs: | |
635 | arg = strdelim(&s); | |
636 | if (!arg || *arg == '\0') | |
637 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
638 | if (!mac_valid(arg)) | |
639 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
e9702f7d | 640 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 641 | if (*activep && options->macs == NULL) |
642 | options->macs = xstrdup(arg); | |
643 | break; | |
644 | ||
645 | case oHostKeyAlgorithms: | |
646 | arg = strdelim(&s); | |
647 | if (!arg || *arg == '\0') | |
648 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
649 | if (!key_names_valid2(arg)) | |
650 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
e9702f7d | 651 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 652 | if (*activep && options->hostkeyalgorithms == NULL) |
653 | options->hostkeyalgorithms = xstrdup(arg); | |
654 | break; | |
655 | ||
656 | case oProtocol: | |
657 | intptr = &options->protocol; | |
658 | arg = strdelim(&s); | |
659 | if (!arg || *arg == '\0') | |
660 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
661 | value = proto_spec(arg); | |
662 | if (value == SSH_PROTO_UNKNOWN) | |
663 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
e9702f7d | 664 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 665 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
666 | *intptr = value; | |
667 | break; | |
668 | ||
669 | case oLogLevel: | |
670 | intptr = (int *) &options->log_level; | |
671 | arg = strdelim(&s); | |
672 | value = log_level_number(arg); | |
e9702f7d | 673 | if (value == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 674 | fatal("%.200s line %d: unsupported log level '%s'", |
e9702f7d | 675 | filename, linenum, arg ? arg : "<NONE>"); |
676 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) | |
3c0ef626 | 677 | *intptr = (LogLevel) value; |
678 | break; | |
679 | ||
680 | case oLocalForward: | |
681 | case oRemoteForward: | |
682 | arg = strdelim(&s); | |
dfddba3d | 683 | if (arg == NULL || *arg == '\0') |
3c0ef626 | 684 | fatal("%.200s line %d: Missing port argument.", |
685 | filename, linenum); | |
dfddba3d | 686 | arg2 = strdelim(&s); |
687 | if (arg2 == NULL || *arg2 == '\0') | |
688 | fatal("%.200s line %d: Missing target argument.", | |
3c0ef626 | 689 | filename, linenum); |
dfddba3d | 690 | |
691 | /* construct a string for parse_forward */ | |
692 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
693 | ||
694 | if (parse_forward(&fwd, fwdarg) == 0) | |
3c0ef626 | 695 | fatal("%.200s line %d: Bad forwarding specification.", |
696 | filename, linenum); | |
dfddba3d | 697 | |
3c0ef626 | 698 | if (*activep) { |
699 | if (opcode == oLocalForward) | |
dfddba3d | 700 | add_local_forward(options, &fwd); |
3c0ef626 | 701 | else if (opcode == oRemoteForward) |
dfddba3d | 702 | add_remote_forward(options, &fwd); |
3c0ef626 | 703 | } |
704 | break; | |
705 | ||
706 | case oDynamicForward: | |
707 | arg = strdelim(&s); | |
708 | if (!arg || *arg == '\0') | |
709 | fatal("%.200s line %d: Missing port argument.", | |
710 | filename, linenum); | |
dfddba3d | 711 | memset(&fwd, '\0', sizeof(fwd)); |
712 | fwd.connect_host = "socks"; | |
713 | fwd.listen_host = hpdelim(&arg); | |
714 | if (fwd.listen_host == NULL || | |
715 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
716 | fatal("%.200s line %d: Bad forwarding specification.", | |
717 | filename, linenum); | |
718 | if (arg) { | |
719 | fwd.listen_port = a2port(arg); | |
720 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
721 | } else { | |
722 | fwd.listen_port = a2port(fwd.listen_host); | |
2ce0bfe4 | 723 | fwd.listen_host = NULL; |
dfddba3d | 724 | } |
725 | if (fwd.listen_port == 0) | |
3c0ef626 | 726 | fatal("%.200s line %d: Badly formatted port number.", |
727 | filename, linenum); | |
728 | if (*activep) | |
dfddba3d | 729 | add_local_forward(options, &fwd); |
3c0ef626 | 730 | break; |
731 | ||
732 | case oClearAllForwardings: | |
733 | intptr = &options->clear_forwardings; | |
734 | goto parse_flag; | |
735 | ||
736 | case oHost: | |
737 | *activep = 0; | |
738 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') | |
739 | if (match_pattern(host, arg)) { | |
740 | debug("Applying options for %.100s", arg); | |
741 | *activep = 1; | |
742 | break; | |
743 | } | |
744 | /* Avoid garbage check below, as strdelim is done. */ | |
745 | return 0; | |
746 | ||
747 | case oEscapeChar: | |
748 | intptr = &options->escape_char; | |
749 | arg = strdelim(&s); | |
750 | if (!arg || *arg == '\0') | |
751 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
752 | if (arg[0] == '^' && arg[2] == 0 && | |
753 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) | |
754 | value = (u_char) arg[1] & 31; | |
755 | else if (strlen(arg) == 1) | |
756 | value = (u_char) arg[0]; | |
757 | else if (strcmp(arg, "none") == 0) | |
758 | value = SSH_ESCAPECHAR_NONE; | |
759 | else { | |
760 | fatal("%.200s line %d: Bad escape character.", | |
e9702f7d | 761 | filename, linenum); |
3c0ef626 | 762 | /* NOTREACHED */ |
763 | value = 0; /* Avoid compiler warning. */ | |
764 | } | |
765 | if (*activep && *intptr == -1) | |
766 | *intptr = value; | |
767 | break; | |
768 | ||
7cac2b65 | 769 | case oAddressFamily: |
770 | arg = strdelim(&s); | |
2ce0bfe4 | 771 | if (!arg || *arg == '\0') |
772 | fatal("%s line %d: missing address family.", | |
773 | filename, linenum); | |
7cac2b65 | 774 | intptr = &options->address_family; |
775 | if (strcasecmp(arg, "inet") == 0) | |
776 | value = AF_INET; | |
777 | else if (strcasecmp(arg, "inet6") == 0) | |
778 | value = AF_INET6; | |
779 | else if (strcasecmp(arg, "any") == 0) | |
780 | value = AF_UNSPEC; | |
781 | else | |
782 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
783 | if (*activep && *intptr == -1) | |
784 | *intptr = value; | |
785 | break; | |
786 | ||
bfe49944 | 787 | case oEnableSSHKeysign: |
788 | intptr = &options->enable_ssh_keysign; | |
789 | goto parse_flag; | |
790 | ||
12a403af | 791 | case oIdentitiesOnly: |
792 | intptr = &options->identities_only; | |
793 | goto parse_flag; | |
794 | ||
540d72c3 | 795 | case oServerAliveInterval: |
796 | intptr = &options->server_alive_interval; | |
797 | goto parse_time; | |
798 | ||
799 | case oServerAliveCountMax: | |
800 | intptr = &options->server_alive_count_max; | |
801 | goto parse_int; | |
802 | ||
7e82606e | 803 | case oSendEnv: |
804 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
805 | if (strchr(arg, '=') != NULL) | |
806 | fatal("%s line %d: Invalid environment name.", | |
807 | filename, linenum); | |
dfddba3d | 808 | if (!*activep) |
809 | continue; | |
7e82606e | 810 | if (options->num_send_env >= MAX_SEND_ENV) |
811 | fatal("%s line %d: too many send env.", | |
812 | filename, linenum); | |
813 | options->send_env[options->num_send_env++] = | |
814 | xstrdup(arg); | |
815 | } | |
816 | break; | |
817 | ||
818 | case oControlPath: | |
819 | charptr = &options->control_path; | |
820 | goto parse_string; | |
821 | ||
822 | case oControlMaster: | |
823 | intptr = &options->control_master; | |
2ce0bfe4 | 824 | arg = strdelim(&s); |
825 | if (!arg || *arg == '\0') | |
826 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
827 | filename, linenum); | |
828 | value = 0; /* To avoid compiler warning... */ | |
829 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
830 | value = SSHCTL_MASTER_YES; | |
831 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
832 | value = SSHCTL_MASTER_NO; | |
833 | else if (strcmp(arg, "auto") == 0) | |
834 | value = SSHCTL_MASTER_AUTO; | |
835 | else if (strcmp(arg, "ask") == 0) | |
836 | value = SSHCTL_MASTER_ASK; | |
837 | else if (strcmp(arg, "autoask") == 0) | |
838 | value = SSHCTL_MASTER_AUTO_ASK; | |
839 | else | |
840 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
841 | filename, linenum); | |
842 | if (*activep && *intptr == -1) | |
843 | *intptr = value; | |
844 | break; | |
7e82606e | 845 | |
dfddba3d | 846 | case oHashKnownHosts: |
847 | intptr = &options->hash_known_hosts; | |
848 | goto parse_flag; | |
849 | ||
08822d99 | 850 | case oTunnel: |
851 | intptr = &options->tun_open; | |
852 | arg = strdelim(&s); | |
853 | if (!arg || *arg == '\0') | |
854 | fatal("%s line %d: Missing yes/point-to-point/" | |
855 | "ethernet/no argument.", filename, linenum); | |
856 | value = 0; /* silence compiler */ | |
857 | if (strcasecmp(arg, "ethernet") == 0) | |
858 | value = SSH_TUNMODE_ETHERNET; | |
859 | else if (strcasecmp(arg, "point-to-point") == 0) | |
860 | value = SSH_TUNMODE_POINTOPOINT; | |
861 | else if (strcasecmp(arg, "yes") == 0) | |
862 | value = SSH_TUNMODE_DEFAULT; | |
863 | else if (strcasecmp(arg, "no") == 0) | |
864 | value = SSH_TUNMODE_NO; | |
865 | else | |
866 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
867 | "no argument: %s", filename, linenum, arg); | |
868 | if (*activep) | |
869 | *intptr = value; | |
870 | break; | |
871 | ||
872 | case oTunnelDevice: | |
873 | arg = strdelim(&s); | |
874 | if (!arg || *arg == '\0') | |
875 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
876 | value = a2tun(arg, &value2); | |
877 | if (value == SSH_TUNID_ERR) | |
878 | fatal("%.200s line %d: Bad tun device.", filename, linenum); | |
879 | if (*activep) { | |
880 | options->tun_local = value; | |
881 | options->tun_remote = value2; | |
882 | } | |
883 | break; | |
884 | ||
885 | case oLocalCommand: | |
886 | charptr = &options->local_command; | |
887 | goto parse_command; | |
888 | ||
889 | case oPermitLocalCommand: | |
890 | intptr = &options->permit_local_command; | |
891 | goto parse_flag; | |
892 | ||
44a053a3 | 893 | case oDeprecated: |
894 | debug("%s line %d: Deprecated option \"%s\"", | |
895 | filename, linenum, keyword); | |
896 | return 0; | |
897 | ||
7cac2b65 | 898 | case oUnsupported: |
899 | error("%s line %d: Unsupported option \"%s\"", | |
900 | filename, linenum, keyword); | |
901 | return 0; | |
902 | ||
3c0ef626 | 903 | default: |
904 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
905 | } | |
906 | ||
907 | /* Check that there is no garbage at end of line. */ | |
908 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
909 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
2ce0bfe4 | 910 | filename, linenum, arg); |
3c0ef626 | 911 | } |
912 | return 0; | |
913 | } | |
914 | ||
915 | ||
916 | /* | |
917 | * Reads the config file and modifies the options accordingly. Options | |
918 | * should already be initialized before this call. This never returns if | |
919 | * there is an error. If the file does not exist, this returns 0. | |
920 | */ | |
921 | ||
922 | int | |
7e82606e | 923 | read_config_file(const char *filename, const char *host, Options *options, |
924 | int checkperm) | |
3c0ef626 | 925 | { |
926 | FILE *f; | |
927 | char line[1024]; | |
928 | int active, linenum; | |
929 | int bad_options = 0; | |
930 | ||
931 | /* Open the file. */ | |
7e82606e | 932 | if ((f = fopen(filename, "r")) == NULL) |
3c0ef626 | 933 | return 0; |
934 | ||
7e82606e | 935 | if (checkperm) { |
936 | struct stat sb; | |
937 | ||
938 | if (fstat(fileno(f), &sb) == -1) | |
939 | fatal("fstat %s: %s", filename, strerror(errno)); | |
940 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || | |
941 | (sb.st_mode & 022) != 0)) | |
942 | fatal("Bad owner or permissions on %s", filename); | |
943 | } | |
944 | ||
3c0ef626 | 945 | debug("Reading configuration data %.200s", filename); |
946 | ||
947 | /* | |
948 | * Mark that we are now processing the options. This flag is turned | |
949 | * on/off by Host specifications. | |
950 | */ | |
951 | active = 1; | |
952 | linenum = 0; | |
953 | while (fgets(line, sizeof(line), f)) { | |
954 | /* Update line number counter. */ | |
955 | linenum++; | |
956 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
957 | bad_options++; | |
958 | } | |
959 | fclose(f); | |
960 | if (bad_options > 0) | |
961 | fatal("%s: terminating, %d bad configuration options", | |
e9702f7d | 962 | filename, bad_options); |
3c0ef626 | 963 | return 1; |
964 | } | |
965 | ||
966 | /* | |
967 | * Initializes options to special values that indicate that they have not yet | |
968 | * been set. Read_config_file will only set options with this value. Options | |
969 | * are processed in the following order: command line, user config file, | |
970 | * system config file. Last, fill_default_options is called. | |
971 | */ | |
972 | ||
973 | void | |
974 | initialize_options(Options * options) | |
975 | { | |
976 | memset(options, 'X', sizeof(*options)); | |
977 | options->forward_agent = -1; | |
978 | options->forward_x11 = -1; | |
540d72c3 | 979 | options->forward_x11_trusted = -1; |
3c0ef626 | 980 | options->xauth_location = NULL; |
981 | options->gateway_ports = -1; | |
982 | options->use_privileged_port = -1; | |
3c0ef626 | 983 | options->rsa_authentication = -1; |
984 | options->pubkey_authentication = -1; | |
985 | options->challenge_response_authentication = -1; | |
7cac2b65 | 986 | options->gss_authentication = -1; |
7a056ed1 | 987 | options->gss_keyex = -1; |
7cac2b65 | 988 | options->gss_deleg_creds = -1; |
fe4ad273 | 989 | options->gss_trust_dns = -1; |
3c0ef626 | 990 | options->password_authentication = -1; |
991 | options->kbd_interactive_authentication = -1; | |
992 | options->kbd_interactive_devices = NULL; | |
993 | options->rhosts_rsa_authentication = -1; | |
994 | options->hostbased_authentication = -1; | |
3c0ef626 | 995 | options->batch_mode = -1; |
996 | options->check_host_ip = -1; | |
997 | options->strict_host_key_checking = -1; | |
998 | options->compression = -1; | |
540d72c3 | 999 | options->tcp_keep_alive = -1; |
3c0ef626 | 1000 | options->compression_level = -1; |
1001 | options->port = -1; | |
7cac2b65 | 1002 | options->address_family = -1; |
3c0ef626 | 1003 | options->connection_attempts = -1; |
7cac2b65 | 1004 | options->connection_timeout = -1; |
3c0ef626 | 1005 | options->number_of_password_prompts = -1; |
1006 | options->cipher = -1; | |
1007 | options->ciphers = NULL; | |
1008 | options->macs = NULL; | |
1009 | options->hostkeyalgorithms = NULL; | |
1010 | options->protocol = SSH_PROTO_UNKNOWN; | |
1011 | options->num_identity_files = 0; | |
1012 | options->hostname = NULL; | |
1013 | options->host_key_alias = NULL; | |
1014 | options->proxy_command = NULL; | |
1015 | options->user = NULL; | |
1016 | options->escape_char = -1; | |
1017 | options->system_hostfile = NULL; | |
1018 | options->user_hostfile = NULL; | |
1019 | options->system_hostfile2 = NULL; | |
1020 | options->user_hostfile2 = NULL; | |
1021 | options->num_local_forwards = 0; | |
1022 | options->num_remote_forwards = 0; | |
1023 | options->clear_forwardings = -1; | |
e9702f7d | 1024 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
3c0ef626 | 1025 | options->preferred_authentications = NULL; |
1026 | options->bind_address = NULL; | |
1027 | options->smartcard_device = NULL; | |
bfe49944 | 1028 | options->enable_ssh_keysign = - 1; |
3c0ef626 | 1029 | options->no_host_authentication_for_localhost = - 1; |
12a403af | 1030 | options->identities_only = - 1; |
7cac2b65 | 1031 | options->rekey_limit = - 1; |
1032 | options->verify_host_key_dns = -1; | |
540d72c3 | 1033 | options->server_alive_interval = -1; |
1034 | options->server_alive_count_max = -1; | |
473db5ab | 1035 | options->none_switch = -1; |
7e82606e | 1036 | options->num_send_env = 0; |
1037 | options->control_path = NULL; | |
1038 | options->control_master = -1; | |
dfddba3d | 1039 | options->hash_known_hosts = -1; |
08822d99 | 1040 | options->tun_open = -1; |
1041 | options->tun_local = -1; | |
1042 | options->tun_remote = -1; | |
1043 | options->local_command = NULL; | |
1044 | options->permit_local_command = -1; | |
3c0ef626 | 1045 | } |
1046 | ||
1047 | /* | |
1048 | * Called after processing other sources of option data, this fills those | |
1049 | * options for which no value has been specified with their default values. | |
1050 | */ | |
1051 | ||
1052 | void | |
1053 | fill_default_options(Options * options) | |
1054 | { | |
1055 | int len; | |
1056 | ||
1057 | if (options->forward_agent == -1) | |
1058 | options->forward_agent = 0; | |
1059 | if (options->forward_x11 == -1) | |
1060 | options->forward_x11 = 0; | |
540d72c3 | 1061 | if (options->forward_x11_trusted == -1) |
1062 | options->forward_x11_trusted = 0; | |
3c0ef626 | 1063 | if (options->xauth_location == NULL) |
1064 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 1065 | if (options->gateway_ports == -1) |
1066 | options->gateway_ports = 0; | |
1067 | if (options->use_privileged_port == -1) | |
1068 | options->use_privileged_port = 0; | |
3c0ef626 | 1069 | if (options->rsa_authentication == -1) |
1070 | options->rsa_authentication = 1; | |
1071 | if (options->pubkey_authentication == -1) | |
1072 | options->pubkey_authentication = 1; | |
1073 | if (options->challenge_response_authentication == -1) | |
1074 | options->challenge_response_authentication = 1; | |
5598e598 | 1075 | if (options->gss_authentication == -1) |
1076 | options->gss_authentication = 1; | |
7a056ed1 | 1077 | if (options->gss_keyex == -1) |
1078 | options->gss_keyex = 1; | |
5598e598 | 1079 | if (options->gss_deleg_creds == -1) |
1080 | options->gss_deleg_creds = 1; | |
fe4ad273 | 1081 | if (options->gss_trust_dns == -1) |
1082 | options->gss_trust_dns = 1; | |
3c0ef626 | 1083 | if (options->password_authentication == -1) |
1084 | options->password_authentication = 1; | |
1085 | if (options->kbd_interactive_authentication == -1) | |
1086 | options->kbd_interactive_authentication = 1; | |
1087 | if (options->rhosts_rsa_authentication == -1) | |
44a053a3 | 1088 | options->rhosts_rsa_authentication = 0; |
3c0ef626 | 1089 | if (options->hostbased_authentication == -1) |
1090 | options->hostbased_authentication = 0; | |
3c0ef626 | 1091 | if (options->batch_mode == -1) |
1092 | options->batch_mode = 0; | |
1093 | if (options->check_host_ip == -1) | |
1094 | options->check_host_ip = 1; | |
1095 | if (options->strict_host_key_checking == -1) | |
1096 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1097 | if (options->compression == -1) | |
1098 | options->compression = 0; | |
540d72c3 | 1099 | if (options->tcp_keep_alive == -1) |
1100 | options->tcp_keep_alive = 1; | |
3c0ef626 | 1101 | if (options->compression_level == -1) |
1102 | options->compression_level = 6; | |
1103 | if (options->port == -1) | |
1104 | options->port = 0; /* Filled in ssh_connect. */ | |
7cac2b65 | 1105 | if (options->address_family == -1) |
1106 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 1107 | if (options->connection_attempts == -1) |
1108 | options->connection_attempts = 1; | |
1109 | if (options->number_of_password_prompts == -1) | |
1110 | options->number_of_password_prompts = 3; | |
1111 | /* Selected in ssh_login(). */ | |
1112 | if (options->cipher == -1) | |
1113 | options->cipher = SSH_CIPHER_NOT_SET; | |
1114 | /* options->ciphers, default set in myproposals.h */ | |
1115 | /* options->macs, default set in myproposals.h */ | |
1116 | /* options->hostkeyalgorithms, default set in myproposals.h */ | |
1117 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
1118 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
1119 | if (options->num_identity_files == 0) { | |
1120 | if (options->protocol & SSH_PROTO_1) { | |
1121 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; | |
1122 | options->identity_files[options->num_identity_files] = | |
1123 | xmalloc(len); | |
1124 | snprintf(options->identity_files[options->num_identity_files++], | |
1125 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
1126 | } | |
1127 | if (options->protocol & SSH_PROTO_2) { | |
1128 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; | |
1129 | options->identity_files[options->num_identity_files] = | |
1130 | xmalloc(len); | |
1131 | snprintf(options->identity_files[options->num_identity_files++], | |
1132 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1133 | ||
1134 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; | |
1135 | options->identity_files[options->num_identity_files] = | |
1136 | xmalloc(len); | |
1137 | snprintf(options->identity_files[options->num_identity_files++], | |
1138 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
1139 | } | |
1140 | } | |
1141 | if (options->escape_char == -1) | |
1142 | options->escape_char = '~'; | |
1143 | if (options->system_hostfile == NULL) | |
1144 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; | |
1145 | if (options->user_hostfile == NULL) | |
1146 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; | |
1147 | if (options->system_hostfile2 == NULL) | |
1148 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; | |
1149 | if (options->user_hostfile2 == NULL) | |
1150 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; | |
e9702f7d | 1151 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 1152 | options->log_level = SYSLOG_LEVEL_INFO; |
1153 | if (options->clear_forwardings == 1) | |
1154 | clear_forwardings(options); | |
1155 | if (options->no_host_authentication_for_localhost == - 1) | |
1156 | options->no_host_authentication_for_localhost = 0; | |
12a403af | 1157 | if (options->identities_only == -1) |
1158 | options->identities_only = 0; | |
bfe49944 | 1159 | if (options->enable_ssh_keysign == -1) |
1160 | options->enable_ssh_keysign = 0; | |
7cac2b65 | 1161 | if (options->rekey_limit == -1) |
1162 | options->rekey_limit = 0; | |
1163 | if (options->verify_host_key_dns == -1) | |
1164 | options->verify_host_key_dns = 0; | |
540d72c3 | 1165 | if (options->server_alive_interval == -1) |
1166 | options->server_alive_interval = 0; | |
1167 | if (options->server_alive_count_max == -1) | |
1168 | options->server_alive_count_max = 3; | |
473db5ab | 1169 | if (options->none_switch == -1) |
1170 | options->none_switch = 0; | |
7e82606e | 1171 | if (options->control_master == -1) |
1172 | options->control_master = 0; | |
dfddba3d | 1173 | if (options->hash_known_hosts == -1) |
1174 | options->hash_known_hosts = 0; | |
08822d99 | 1175 | if (options->tun_open == -1) |
1176 | options->tun_open = SSH_TUNMODE_NO; | |
1177 | if (options->tun_local == -1) | |
1178 | options->tun_local = SSH_TUNID_ANY; | |
1179 | if (options->tun_remote == -1) | |
1180 | options->tun_remote = SSH_TUNID_ANY; | |
1181 | if (options->permit_local_command == -1) | |
1182 | options->permit_local_command = 0; | |
1183 | /* options->local_command should not be set by default */ | |
3c0ef626 | 1184 | /* options->proxy_command should not be set by default */ |
1185 | /* options->user will be set in the main program if appropriate */ | |
1186 | /* options->hostname will be set in the main program if appropriate */ | |
1187 | /* options->host_key_alias should not be set by default */ | |
1188 | /* options->preferred_authentications will be set in ssh */ | |
1189 | } | |
dfddba3d | 1190 | |
1191 | /* | |
1192 | * parse_forward | |
1193 | * parses a string containing a port forwarding specification of the form: | |
1194 | * [listenhost:]listenport:connecthost:connectport | |
1195 | * returns number of arguments parsed or zero on error | |
1196 | */ | |
1197 | int | |
1198 | parse_forward(Forward *fwd, const char *fwdspec) | |
1199 | { | |
1200 | int i; | |
1201 | char *p, *cp, *fwdarg[4]; | |
1202 | ||
1203 | memset(fwd, '\0', sizeof(*fwd)); | |
1204 | ||
1205 | cp = p = xstrdup(fwdspec); | |
1206 | ||
1207 | /* skip leading spaces */ | |
1208 | while (*cp && isspace(*cp)) | |
1209 | cp++; | |
1210 | ||
1211 | for (i = 0; i < 4; ++i) | |
1212 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1213 | break; | |
1214 | ||
1215 | /* Check for trailing garbage in 4-arg case*/ | |
1216 | if (cp != NULL) | |
1217 | i = 0; /* failure */ | |
1218 | ||
1219 | switch (i) { | |
1220 | case 3: | |
1221 | fwd->listen_host = NULL; | |
1222 | fwd->listen_port = a2port(fwdarg[0]); | |
1223 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1224 | fwd->connect_port = a2port(fwdarg[2]); | |
1225 | break; | |
1226 | ||
1227 | case 4: | |
1228 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1229 | fwd->listen_port = a2port(fwdarg[1]); | |
1230 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1231 | fwd->connect_port = a2port(fwdarg[3]); | |
1232 | break; | |
1233 | default: | |
1234 | i = 0; /* failure */ | |
1235 | } | |
1236 | ||
1237 | xfree(p); | |
1238 | ||
1239 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1240 | goto fail_free; | |
1241 | ||
1242 | if (fwd->connect_host != NULL && | |
1243 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1244 | goto fail_free; | |
1245 | ||
1246 | return (i); | |
1247 | ||
1248 | fail_free: | |
1249 | if (fwd->connect_host != NULL) | |
1250 | xfree(fwd->connect_host); | |
1251 | if (fwd->listen_host != NULL) | |
1252 | xfree(fwd->listen_host); | |
1253 | return (0); | |
1254 | } |