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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * Functions for reading the configuration files. |
6ae2364d | 6 | * |
bcbf86ec | 7 | * As far as I am concerned, the code I have written for this software |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
14 | #include "includes.h" | |
f8cc7664 | 15 | RCSID("$OpenBSD: readconf.c,v 1.139 2005/03/10 22:01:05 deraadt Exp $"); |
8efc0c15 | 16 | |
17 | #include "ssh.h" | |
8efc0c15 | 18 | #include "xmalloc.h" |
a8be9f80 | 19 | #include "compat.h" |
42f11eb2 | 20 | #include "cipher.h" |
21 | #include "pathnames.h" | |
22 | #include "log.h" | |
23 | #include "readconf.h" | |
24 | #include "match.h" | |
25 | #include "misc.h" | |
b2552997 | 26 | #include "kex.h" |
27 | #include "mac.h" | |
8efc0c15 | 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 | |
80fcb74e | 44 | User foo |
8efc0c15 | 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 | |
8efc0c15 | 60 | PasswordAuthentication no |
61 | ||
62 | Host puukko.hut.fi | |
63 | User t35124p | |
64 | ProxyCommand ssh-proxy %h %p | |
65 | ||
66 | Host *.fr | |
80fcb74e | 67 | PublicKeyAuthentication no |
8efc0c15 | 68 | |
69 | Host *.su | |
70 | Cipher none | |
71 | PasswordAuthentication no | |
72 | ||
73 | # Defaults for various options | |
74 | Host * | |
75 | ForwardAgent no | |
fa08c86b | 76 | ForwardX11 no |
8efc0c15 | 77 | PasswordAuthentication yes |
78 | RSAAuthentication yes | |
79 | RhostsRSAAuthentication yes | |
8efc0c15 | 80 | StrictHostKeyChecking yes |
fd573618 | 81 | TcpKeepAlive no |
8efc0c15 | 82 | IdentityFile ~/.ssh/identity |
83 | Port 22 | |
84 | EscapeChar ~ | |
85 | ||
86 | */ | |
87 | ||
88 | /* Keyword tokens. */ | |
89 | ||
5260325f | 90 | typedef enum { |
91 | oBadOption, | |
d73a67d7 | 92 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
7203d6bb | 93 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 94 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 95 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
96 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
97 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
98 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 99 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 100 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 101 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 102 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 103 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 104 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 105 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 106 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 107 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 108 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 109 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
a2144546 | 110 | oDeprecated, oUnsupported |
8efc0c15 | 111 | } OpCodes; |
112 | ||
113 | /* Textual representations of the tokens. */ | |
114 | ||
5260325f | 115 | static struct { |
116 | const char *name; | |
117 | OpCodes opcode; | |
118 | } keywords[] = { | |
119 | { "forwardagent", oForwardAgent }, | |
120 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 121 | { "forwardx11trusted", oForwardX11Trusted }, |
fa649821 | 122 | { "xauthlocation", oXAuthLocation }, |
5260325f | 123 | { "gatewayports", oGatewayPorts }, |
124 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 125 | { "rhostsauthentication", oDeprecated }, |
5260325f | 126 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 127 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
128 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 129 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 130 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 131 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 132 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 133 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 134 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
135 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
136 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 137 | { "kerberosauthentication", oUnsupported }, |
138 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 139 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 140 | #if defined(GSSAPI) |
141 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 142 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
143 | #else | |
144 | { "gssapiauthentication", oUnsupported }, | |
145 | { "gssapidelegatecredentials", oUnsupported }, | |
146 | #endif | |
80fcb74e | 147 | { "fallbacktorsh", oDeprecated }, |
148 | { "usersh", oDeprecated }, | |
5260325f | 149 | { "identityfile", oIdentityFile }, |
fa08c86b | 150 | { "identityfile2", oIdentityFile }, /* alias */ |
3a065ed0 | 151 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 152 | { "hostname", oHostName }, |
8abcdba4 | 153 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 154 | { "proxycommand", oProxyCommand }, |
155 | { "port", oPort }, | |
156 | { "cipher", oCipher }, | |
a8be9f80 | 157 | { "ciphers", oCiphers }, |
b2552997 | 158 | { "macs", oMacs }, |
a8be9f80 | 159 | { "protocol", oProtocol }, |
5260325f | 160 | { "remoteforward", oRemoteForward }, |
161 | { "localforward", oLocalForward }, | |
162 | { "user", oUser }, | |
163 | { "host", oHost }, | |
164 | { "escapechar", oEscapeChar }, | |
5260325f | 165 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
f49bc4f7 | 166 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ |
a306f2dd | 167 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
f49bc4f7 | 168 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 169 | { "connectionattempts", oConnectionAttempts }, |
170 | { "batchmode", oBatchMode }, | |
171 | { "checkhostip", oCheckHostIP }, | |
172 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
173 | { "compression", oCompression }, | |
174 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 175 | { "tcpkeepalive", oTCPKeepAlive }, |
176 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 177 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 178 | { "loglevel", oLogLevel }, |
0490e609 | 179 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 180 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 181 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 182 | { "bindaddress", oBindAddress }, |
a2144546 | 183 | #ifdef SMARTCARD |
eea098a3 | 184 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 185 | #else |
186 | { "smartcarddevice", oUnsupported }, | |
187 | #endif | |
184eed6a | 188 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 189 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 190 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 191 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 192 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 193 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 194 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 195 | { "serveraliveinterval", oServerAliveInterval }, |
196 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 197 | { "sendenv", oSendEnv }, |
5e96b616 | 198 | { "controlpath", oControlPath }, |
199 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 200 | { "hashknownhosts", oHashKnownHosts }, |
17a3011c | 201 | { NULL, oBadOption } |
6a17f9c2 | 202 | }; |
203 | ||
aa3378df | 204 | /* |
205 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
206 | * error. | |
207 | */ | |
8efc0c15 | 208 | |
6ae2364d | 209 | void |
3867aa0a | 210 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 211 | { |
5260325f | 212 | Forward *fwd; |
e6f15ed1 | 213 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 214 | extern uid_t original_real_uid; |
3867aa0a | 215 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 216 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 217 | #endif |
5260325f | 218 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
219 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
220 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 221 | |
222 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
223 | NULL : xstrdup(newfwd->listen_host); | |
224 | fwd->listen_port = newfwd->listen_port; | |
225 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
226 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 227 | } |
228 | ||
aa3378df | 229 | /* |
230 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
231 | * an error. | |
232 | */ | |
8efc0c15 | 233 | |
6ae2364d | 234 | void |
3867aa0a | 235 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 236 | { |
5260325f | 237 | Forward *fwd; |
238 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
239 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 240 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 241 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
3867aa0a | 242 | |
243 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
244 | NULL : xstrdup(newfwd->listen_host); | |
245 | fwd->listen_port = newfwd->listen_port; | |
246 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
247 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 248 | } |
249 | ||
e1c5bfaf | 250 | static void |
251 | clear_forwardings(Options *options) | |
252 | { | |
253 | int i; | |
254 | ||
3867aa0a | 255 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 256 | if (options->local_forwards[i].listen_host != NULL) |
257 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 258 | xfree(options->local_forwards[i].connect_host); |
259 | } | |
e1c5bfaf | 260 | options->num_local_forwards = 0; |
3867aa0a | 261 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 262 | if (options->remote_forwards[i].listen_host != NULL) |
263 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 264 | xfree(options->remote_forwards[i].connect_host); |
265 | } | |
e1c5bfaf | 266 | options->num_remote_forwards = 0; |
267 | } | |
268 | ||
aa3378df | 269 | /* |
6be9a5e8 | 270 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 271 | */ |
8efc0c15 | 272 | |
6ae2364d | 273 | static OpCodes |
5260325f | 274 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 275 | { |
1e3b8b07 | 276 | u_int i; |
8efc0c15 | 277 | |
5260325f | 278 | for (i = 0; keywords[i].name; i++) |
aa3378df | 279 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 280 | return keywords[i].opcode; |
8efc0c15 | 281 | |
b7c70970 | 282 | error("%s: line %d: Bad configuration option: %s", |
283 | filename, linenum, cp); | |
5260325f | 284 | return oBadOption; |
8efc0c15 | 285 | } |
286 | ||
aa3378df | 287 | /* |
288 | * Processes a single option line as used in the configuration files. This | |
289 | * only sets those values that have not already been set. | |
290 | */ | |
d718e75d | 291 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 292 | |
e7c0f9d5 | 293 | int |
294 | process_config_line(Options *options, const char *host, | |
5260325f | 295 | char *line, const char *filename, int linenum, |
296 | int *activep) | |
8efc0c15 | 297 | { |
3867aa0a | 298 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
57112b5a | 299 | int opcode, *intptr, value; |
d718e75d | 300 | size_t len; |
3867aa0a | 301 | Forward fwd; |
5260325f | 302 | |
204fde99 | 303 | /* Strip trailing whitespace */ |
f8cc7664 | 304 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 305 | if (strchr(WHITESPACE, line[len]) == NULL) |
306 | break; | |
307 | line[len] = '\0'; | |
308 | } | |
309 | ||
704b1659 | 310 | s = line; |
311 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
312 | keyword = strdelim(&s); | |
313 | /* Ignore leading whitespace. */ | |
314 | if (*keyword == '\0') | |
315 | keyword = strdelim(&s); | |
42f11eb2 | 316 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 317 | return 0; |
318 | ||
089fbbd2 | 319 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 320 | |
321 | switch (opcode) { | |
322 | case oBadOption: | |
aa3378df | 323 | /* don't panic, but count bad options */ |
324 | return -1; | |
5260325f | 325 | /* NOTREACHED */ |
09ab3296 | 326 | case oConnectTimeout: |
327 | intptr = &options->connection_timeout; | |
5d8d32a3 | 328 | parse_time: |
09ab3296 | 329 | arg = strdelim(&s); |
330 | if (!arg || *arg == '\0') | |
331 | fatal("%s line %d: missing time value.", | |
332 | filename, linenum); | |
333 | if ((value = convtime(arg)) == -1) | |
334 | fatal("%s line %d: invalid time value.", | |
335 | filename, linenum); | |
336 | if (*intptr == -1) | |
337 | *intptr = value; | |
338 | break; | |
339 | ||
5260325f | 340 | case oForwardAgent: |
341 | intptr = &options->forward_agent; | |
342 | parse_flag: | |
704b1659 | 343 | arg = strdelim(&s); |
089fbbd2 | 344 | if (!arg || *arg == '\0') |
5260325f | 345 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
346 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 347 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 348 | value = 1; |
089fbbd2 | 349 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 350 | value = 0; |
351 | else | |
352 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
353 | if (*activep && *intptr == -1) | |
354 | *intptr = value; | |
355 | break; | |
356 | ||
357 | case oForwardX11: | |
358 | intptr = &options->forward_x11; | |
359 | goto parse_flag; | |
360 | ||
d73a67d7 | 361 | case oForwardX11Trusted: |
362 | intptr = &options->forward_x11_trusted; | |
363 | goto parse_flag; | |
364 | ||
5260325f | 365 | case oGatewayPorts: |
366 | intptr = &options->gateway_ports; | |
367 | goto parse_flag; | |
368 | ||
369 | case oUsePrivilegedPort: | |
370 | intptr = &options->use_privileged_port; | |
371 | goto parse_flag; | |
372 | ||
5260325f | 373 | case oPasswordAuthentication: |
374 | intptr = &options->password_authentication; | |
375 | goto parse_flag; | |
376 | ||
94ec8c6b | 377 | case oKbdInteractiveAuthentication: |
378 | intptr = &options->kbd_interactive_authentication; | |
379 | goto parse_flag; | |
380 | ||
381 | case oKbdInteractiveDevices: | |
382 | charptr = &options->kbd_interactive_devices; | |
383 | goto parse_string; | |
384 | ||
fa08c86b | 385 | case oPubkeyAuthentication: |
386 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 387 | goto parse_flag; |
388 | ||
5260325f | 389 | case oRSAAuthentication: |
390 | intptr = &options->rsa_authentication; | |
391 | goto parse_flag; | |
392 | ||
393 | case oRhostsRSAAuthentication: | |
394 | intptr = &options->rhosts_rsa_authentication; | |
395 | goto parse_flag; | |
396 | ||
8002af61 | 397 | case oHostbasedAuthentication: |
398 | intptr = &options->hostbased_authentication; | |
399 | goto parse_flag; | |
400 | ||
d464095c | 401 | case oChallengeResponseAuthentication: |
5ba55ada | 402 | intptr = &options->challenge_response_authentication; |
5260325f | 403 | goto parse_flag; |
d0ec7f42 | 404 | |
7364bd04 | 405 | case oGssAuthentication: |
406 | intptr = &options->gss_authentication; | |
407 | goto parse_flag; | |
408 | ||
409 | case oGssDelegateCreds: | |
410 | intptr = &options->gss_deleg_creds; | |
411 | goto parse_flag; | |
412 | ||
5260325f | 413 | case oBatchMode: |
414 | intptr = &options->batch_mode; | |
415 | goto parse_flag; | |
416 | ||
417 | case oCheckHostIP: | |
418 | intptr = &options->check_host_ip; | |
419 | goto parse_flag; | |
420 | ||
21289cd0 | 421 | case oVerifyHostKeyDNS: |
422 | intptr = &options->verify_host_key_dns; | |
0161a13d | 423 | goto parse_yesnoask; |
21289cd0 | 424 | |
5260325f | 425 | case oStrictHostKeyChecking: |
426 | intptr = &options->strict_host_key_checking; | |
0161a13d | 427 | parse_yesnoask: |
704b1659 | 428 | arg = strdelim(&s); |
089fbbd2 | 429 | if (!arg || *arg == '\0') |
c76c8819 | 430 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 431 | filename, linenum); |
5260325f | 432 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 433 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 434 | value = 1; |
089fbbd2 | 435 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 436 | value = 0; |
089fbbd2 | 437 | else if (strcmp(arg, "ask") == 0) |
5260325f | 438 | value = 2; |
439 | else | |
440 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
441 | if (*activep && *intptr == -1) | |
442 | *intptr = value; | |
443 | break; | |
444 | ||
445 | case oCompression: | |
446 | intptr = &options->compression; | |
447 | goto parse_flag; | |
448 | ||
fd573618 | 449 | case oTCPKeepAlive: |
450 | intptr = &options->tcp_keep_alive; | |
5260325f | 451 | goto parse_flag; |
452 | ||
8bbc048a | 453 | case oNoHostAuthenticationForLocalhost: |
454 | intptr = &options->no_host_authentication_for_localhost; | |
455 | goto parse_flag; | |
456 | ||
5260325f | 457 | case oNumberOfPasswordPrompts: |
458 | intptr = &options->number_of_password_prompts; | |
459 | goto parse_int; | |
460 | ||
461 | case oCompressionLevel: | |
462 | intptr = &options->compression_level; | |
463 | goto parse_int; | |
464 | ||
ffd7b36b | 465 | case oRekeyLimit: |
466 | intptr = &options->rekey_limit; | |
467 | arg = strdelim(&s); | |
468 | if (!arg || *arg == '\0') | |
469 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
470 | if (arg[0] < '0' || arg[0] > '9') | |
471 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
472 | value = strtol(arg, &endofnumber, 10); | |
473 | if (arg == endofnumber) | |
474 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
475 | switch (toupper(*endofnumber)) { | |
476 | case 'K': | |
477 | value *= 1<<10; | |
478 | break; | |
479 | case 'M': | |
480 | value *= 1<<20; | |
481 | break; | |
482 | case 'G': | |
483 | value *= 1<<30; | |
484 | break; | |
485 | } | |
486 | if (*activep && *intptr == -1) | |
487 | *intptr = value; | |
488 | break; | |
489 | ||
5260325f | 490 | case oIdentityFile: |
704b1659 | 491 | arg = strdelim(&s); |
089fbbd2 | 492 | if (!arg || *arg == '\0') |
5260325f | 493 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
494 | if (*activep) { | |
fa08c86b | 495 | intptr = &options->num_identity_files; |
a306f2dd | 496 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 497 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 498 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
fa08c86b | 499 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 500 | *charptr = xstrdup(arg); |
a306f2dd | 501 | *intptr = *intptr + 1; |
5260325f | 502 | } |
503 | break; | |
504 | ||
fa649821 | 505 | case oXAuthLocation: |
506 | charptr=&options->xauth_location; | |
507 | goto parse_string; | |
508 | ||
5260325f | 509 | case oUser: |
510 | charptr = &options->user; | |
511 | parse_string: | |
704b1659 | 512 | arg = strdelim(&s); |
089fbbd2 | 513 | if (!arg || *arg == '\0') |
5260325f | 514 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
515 | if (*activep && *charptr == NULL) | |
089fbbd2 | 516 | *charptr = xstrdup(arg); |
5260325f | 517 | break; |
518 | ||
519 | case oGlobalKnownHostsFile: | |
520 | charptr = &options->system_hostfile; | |
521 | goto parse_string; | |
522 | ||
523 | case oUserKnownHostsFile: | |
524 | charptr = &options->user_hostfile; | |
525 | goto parse_string; | |
526 | ||
a306f2dd | 527 | case oGlobalKnownHostsFile2: |
528 | charptr = &options->system_hostfile2; | |
529 | goto parse_string; | |
530 | ||
531 | case oUserKnownHostsFile2: | |
532 | charptr = &options->user_hostfile2; | |
533 | goto parse_string; | |
534 | ||
5260325f | 535 | case oHostName: |
536 | charptr = &options->hostname; | |
537 | goto parse_string; | |
538 | ||
8abcdba4 | 539 | case oHostKeyAlias: |
540 | charptr = &options->host_key_alias; | |
541 | goto parse_string; | |
542 | ||
cab80f75 | 543 | case oPreferredAuthentications: |
544 | charptr = &options->preferred_authentications; | |
545 | goto parse_string; | |
546 | ||
3435f5a6 | 547 | case oBindAddress: |
548 | charptr = &options->bind_address; | |
549 | goto parse_string; | |
550 | ||
eea098a3 | 551 | case oSmartcardDevice: |
9ff6f66f | 552 | charptr = &options->smartcard_device; |
553 | goto parse_string; | |
eea098a3 | 554 | |
5260325f | 555 | case oProxyCommand: |
2d9c1828 | 556 | if (s == NULL) |
557 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
5260325f | 558 | charptr = &options->proxy_command; |
d718e75d | 559 | len = strspn(s, WHITESPACE "="); |
5260325f | 560 | if (*activep && *charptr == NULL) |
d718e75d | 561 | *charptr = xstrdup(s + len); |
5260325f | 562 | return 0; |
563 | ||
564 | case oPort: | |
565 | intptr = &options->port; | |
566 | parse_int: | |
704b1659 | 567 | arg = strdelim(&s); |
089fbbd2 | 568 | if (!arg || *arg == '\0') |
5260325f | 569 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 570 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 571 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 572 | |
573 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 574 | value = strtol(arg, &endofnumber, 0); |
575 | if (arg == endofnumber) | |
aa3378df | 576 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 577 | if (*activep && *intptr == -1) |
578 | *intptr = value; | |
579 | break; | |
580 | ||
581 | case oConnectionAttempts: | |
582 | intptr = &options->connection_attempts; | |
583 | goto parse_int; | |
584 | ||
585 | case oCipher: | |
586 | intptr = &options->cipher; | |
704b1659 | 587 | arg = strdelim(&s); |
089fbbd2 | 588 | if (!arg || *arg == '\0') |
71276795 | 589 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 590 | value = cipher_number(arg); |
5260325f | 591 | if (value == -1) |
592 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 593 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 594 | if (*activep && *intptr == -1) |
595 | *intptr = value; | |
596 | break; | |
597 | ||
a8be9f80 | 598 | case oCiphers: |
704b1659 | 599 | arg = strdelim(&s); |
089fbbd2 | 600 | if (!arg || *arg == '\0') |
71276795 | 601 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 602 | if (!ciphers_valid(arg)) |
d0c832f3 | 603 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 604 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 605 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 606 | options->ciphers = xstrdup(arg); |
a8be9f80 | 607 | break; |
608 | ||
b2552997 | 609 | case oMacs: |
610 | arg = strdelim(&s); | |
611 | if (!arg || *arg == '\0') | |
612 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
613 | if (!mac_valid(arg)) | |
614 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 615 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 616 | if (*activep && options->macs == NULL) |
617 | options->macs = xstrdup(arg); | |
618 | break; | |
619 | ||
e961a8f9 | 620 | case oHostKeyAlgorithms: |
621 | arg = strdelim(&s); | |
622 | if (!arg || *arg == '\0') | |
623 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
624 | if (!key_names_valid2(arg)) | |
625 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 626 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 627 | if (*activep && options->hostkeyalgorithms == NULL) |
628 | options->hostkeyalgorithms = xstrdup(arg); | |
629 | break; | |
630 | ||
a8be9f80 | 631 | case oProtocol: |
632 | intptr = &options->protocol; | |
704b1659 | 633 | arg = strdelim(&s); |
089fbbd2 | 634 | if (!arg || *arg == '\0') |
71276795 | 635 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 636 | value = proto_spec(arg); |
a8be9f80 | 637 | if (value == SSH_PROTO_UNKNOWN) |
638 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 639 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 640 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
641 | *intptr = value; | |
642 | break; | |
643 | ||
5260325f | 644 | case oLogLevel: |
645 | intptr = (int *) &options->log_level; | |
704b1659 | 646 | arg = strdelim(&s); |
089fbbd2 | 647 | value = log_level_number(arg); |
5eaf8578 | 648 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 649 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 650 | filename, linenum, arg ? arg : "<NONE>"); |
5eaf8578 | 651 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) |
5260325f | 652 | *intptr = (LogLevel) value; |
653 | break; | |
654 | ||
5260325f | 655 | case oLocalForward: |
3a8aabf0 | 656 | case oRemoteForward: |
704b1659 | 657 | arg = strdelim(&s); |
3867aa0a | 658 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 659 | fatal("%.200s line %d: Missing port argument.", |
660 | filename, linenum); | |
3867aa0a | 661 | arg2 = strdelim(&s); |
662 | if (arg2 == NULL || *arg2 == '\0') | |
663 | fatal("%.200s line %d: Missing target argument.", | |
3a8aabf0 | 664 | filename, linenum); |
3867aa0a | 665 | |
666 | /* construct a string for parse_forward */ | |
667 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
668 | ||
669 | if (parse_forward(&fwd, fwdarg) == 0) | |
3a8aabf0 | 670 | fatal("%.200s line %d: Bad forwarding specification.", |
671 | filename, linenum); | |
3867aa0a | 672 | |
3a8aabf0 | 673 | if (*activep) { |
674 | if (opcode == oLocalForward) | |
3867aa0a | 675 | add_local_forward(options, &fwd); |
3a8aabf0 | 676 | else if (opcode == oRemoteForward) |
3867aa0a | 677 | add_remote_forward(options, &fwd); |
3a8aabf0 | 678 | } |
5260325f | 679 | break; |
680 | ||
0490e609 | 681 | case oDynamicForward: |
682 | arg = strdelim(&s); | |
683 | if (!arg || *arg == '\0') | |
684 | fatal("%.200s line %d: Missing port argument.", | |
685 | filename, linenum); | |
3867aa0a | 686 | memset(&fwd, '\0', sizeof(fwd)); |
687 | fwd.connect_host = "socks"; | |
688 | fwd.listen_host = hpdelim(&arg); | |
689 | if (fwd.listen_host == NULL || | |
690 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
691 | fatal("%.200s line %d: Bad forwarding specification.", | |
692 | filename, linenum); | |
693 | if (arg) { | |
694 | fwd.listen_port = a2port(arg); | |
695 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
696 | } else { | |
697 | fwd.listen_port = a2port(fwd.listen_host); | |
698 | fwd.listen_host = ""; | |
699 | } | |
700 | if (fwd.listen_port == 0) | |
0490e609 | 701 | fatal("%.200s line %d: Badly formatted port number.", |
702 | filename, linenum); | |
14e4a15f | 703 | if (*activep) |
3867aa0a | 704 | add_local_forward(options, &fwd); |
8002af61 | 705 | break; |
0490e609 | 706 | |
e1c5bfaf | 707 | case oClearAllForwardings: |
708 | intptr = &options->clear_forwardings; | |
709 | goto parse_flag; | |
710 | ||
5260325f | 711 | case oHost: |
712 | *activep = 0; | |
704b1659 | 713 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 714 | if (match_pattern(host, arg)) { |
715 | debug("Applying options for %.100s", arg); | |
5260325f | 716 | *activep = 1; |
717 | break; | |
718 | } | |
704b1659 | 719 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 720 | return 0; |
721 | ||
722 | case oEscapeChar: | |
723 | intptr = &options->escape_char; | |
704b1659 | 724 | arg = strdelim(&s); |
089fbbd2 | 725 | if (!arg || *arg == '\0') |
5260325f | 726 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 727 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 728 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
729 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 730 | else if (strlen(arg) == 1) |
1e3b8b07 | 731 | value = (u_char) arg[0]; |
089fbbd2 | 732 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 733 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 734 | else { |
735 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 736 | filename, linenum); |
5260325f | 737 | /* NOTREACHED */ |
738 | value = 0; /* Avoid compiler warning. */ | |
739 | } | |
740 | if (*activep && *intptr == -1) | |
741 | *intptr = value; | |
742 | break; | |
743 | ||
f811e52a | 744 | case oAddressFamily: |
745 | arg = strdelim(&s); | |
1572b90f | 746 | intptr = &options->address_family; |
f811e52a | 747 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 748 | value = AF_INET; |
f811e52a | 749 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 750 | value = AF_INET6; |
f811e52a | 751 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 752 | value = AF_UNSPEC; |
f811e52a | 753 | else |
754 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 755 | if (*activep && *intptr == -1) |
756 | *intptr = value; | |
f811e52a | 757 | break; |
758 | ||
cc46e2ee | 759 | case oEnableSSHKeysign: |
760 | intptr = &options->enable_ssh_keysign; | |
761 | goto parse_flag; | |
762 | ||
3a065ed0 | 763 | case oIdentitiesOnly: |
764 | intptr = &options->identities_only; | |
765 | goto parse_flag; | |
766 | ||
5d8d32a3 | 767 | case oServerAliveInterval: |
768 | intptr = &options->server_alive_interval; | |
769 | goto parse_time; | |
770 | ||
771 | case oServerAliveCountMax: | |
772 | intptr = &options->server_alive_count_max; | |
773 | goto parse_int; | |
774 | ||
61a2c1da | 775 | case oSendEnv: |
776 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
777 | if (strchr(arg, '=') != NULL) | |
778 | fatal("%s line %d: Invalid environment name.", | |
779 | filename, linenum); | |
c8c99dd5 | 780 | if (!*activep) |
781 | continue; | |
61a2c1da | 782 | if (options->num_send_env >= MAX_SEND_ENV) |
783 | fatal("%s line %d: too many send env.", | |
784 | filename, linenum); | |
785 | options->send_env[options->num_send_env++] = | |
786 | xstrdup(arg); | |
787 | } | |
788 | break; | |
789 | ||
5e96b616 | 790 | case oControlPath: |
791 | charptr = &options->control_path; | |
792 | goto parse_string; | |
793 | ||
794 | case oControlMaster: | |
795 | intptr = &options->control_master; | |
0d34d6ce | 796 | goto parse_yesnoask; |
5e96b616 | 797 | |
5c63c2ab | 798 | case oHashKnownHosts: |
799 | intptr = &options->hash_known_hosts; | |
800 | goto parse_flag; | |
801 | ||
80fcb74e | 802 | case oDeprecated: |
4feae93d | 803 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 804 | filename, linenum, keyword); |
4feae93d | 805 | return 0; |
80fcb74e | 806 | |
a2144546 | 807 | case oUnsupported: |
808 | error("%s line %d: Unsupported option \"%s\"", | |
809 | filename, linenum, keyword); | |
810 | return 0; | |
811 | ||
5260325f | 812 | default: |
813 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
814 | } | |
815 | ||
816 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 817 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 818 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
184eed6a | 819 | filename, linenum, arg); |
089fbbd2 | 820 | } |
5260325f | 821 | return 0; |
8efc0c15 | 822 | } |
823 | ||
824 | ||
aa3378df | 825 | /* |
826 | * Reads the config file and modifies the options accordingly. Options | |
827 | * should already be initialized before this call. This never returns if | |
93111dfa | 828 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 829 | */ |
8efc0c15 | 830 | |
93111dfa | 831 | int |
f2107e97 | 832 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 833 | int checkperm) |
8efc0c15 | 834 | { |
5260325f | 835 | FILE *f; |
836 | char line[1024]; | |
837 | int active, linenum; | |
838 | int bad_options = 0; | |
839 | ||
840 | /* Open the file. */ | |
9f6cab4b | 841 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 842 | return 0; |
5260325f | 843 | |
9f6cab4b | 844 | if (checkperm) { |
845 | struct stat sb; | |
f2107e97 | 846 | |
f9ee425b | 847 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 848 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 849 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 850 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 851 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 852 | } |
853 | ||
5260325f | 854 | debug("Reading configuration data %.200s", filename); |
855 | ||
aa3378df | 856 | /* |
857 | * Mark that we are now processing the options. This flag is turned | |
858 | * on/off by Host specifications. | |
859 | */ | |
5260325f | 860 | active = 1; |
861 | linenum = 0; | |
862 | while (fgets(line, sizeof(line), f)) { | |
863 | /* Update line number counter. */ | |
864 | linenum++; | |
865 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
866 | bad_options++; | |
867 | } | |
868 | fclose(f); | |
869 | if (bad_options > 0) | |
54b974dc | 870 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 871 | filename, bad_options); |
93111dfa | 872 | return 1; |
8efc0c15 | 873 | } |
874 | ||
aa3378df | 875 | /* |
876 | * Initializes options to special values that indicate that they have not yet | |
877 | * been set. Read_config_file will only set options with this value. Options | |
878 | * are processed in the following order: command line, user config file, | |
879 | * system config file. Last, fill_default_options is called. | |
880 | */ | |
8efc0c15 | 881 | |
6ae2364d | 882 | void |
5260325f | 883 | initialize_options(Options * options) |
8efc0c15 | 884 | { |
5260325f | 885 | memset(options, 'X', sizeof(*options)); |
886 | options->forward_agent = -1; | |
887 | options->forward_x11 = -1; | |
d73a67d7 | 888 | options->forward_x11_trusted = -1; |
fa649821 | 889 | options->xauth_location = NULL; |
5260325f | 890 | options->gateway_ports = -1; |
891 | options->use_privileged_port = -1; | |
5260325f | 892 | options->rsa_authentication = -1; |
fa08c86b | 893 | options->pubkey_authentication = -1; |
5ba55ada | 894 | options->challenge_response_authentication = -1; |
7364bd04 | 895 | options->gss_authentication = -1; |
896 | options->gss_deleg_creds = -1; | |
5260325f | 897 | options->password_authentication = -1; |
94ec8c6b | 898 | options->kbd_interactive_authentication = -1; |
899 | options->kbd_interactive_devices = NULL; | |
5260325f | 900 | options->rhosts_rsa_authentication = -1; |
8002af61 | 901 | options->hostbased_authentication = -1; |
5260325f | 902 | options->batch_mode = -1; |
903 | options->check_host_ip = -1; | |
904 | options->strict_host_key_checking = -1; | |
905 | options->compression = -1; | |
fd573618 | 906 | options->tcp_keep_alive = -1; |
5260325f | 907 | options->compression_level = -1; |
908 | options->port = -1; | |
1572b90f | 909 | options->address_family = -1; |
5260325f | 910 | options->connection_attempts = -1; |
09ab3296 | 911 | options->connection_timeout = -1; |
5260325f | 912 | options->number_of_password_prompts = -1; |
913 | options->cipher = -1; | |
a8be9f80 | 914 | options->ciphers = NULL; |
b2552997 | 915 | options->macs = NULL; |
e961a8f9 | 916 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 917 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 918 | options->num_identity_files = 0; |
919 | options->hostname = NULL; | |
8abcdba4 | 920 | options->host_key_alias = NULL; |
5260325f | 921 | options->proxy_command = NULL; |
922 | options->user = NULL; | |
923 | options->escape_char = -1; | |
924 | options->system_hostfile = NULL; | |
925 | options->user_hostfile = NULL; | |
a306f2dd | 926 | options->system_hostfile2 = NULL; |
927 | options->user_hostfile2 = NULL; | |
5260325f | 928 | options->num_local_forwards = 0; |
929 | options->num_remote_forwards = 0; | |
e1c5bfaf | 930 | options->clear_forwardings = -1; |
5eaf8578 | 931 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 932 | options->preferred_authentications = NULL; |
3435f5a6 | 933 | options->bind_address = NULL; |
9ff6f66f | 934 | options->smartcard_device = NULL; |
cc46e2ee | 935 | options->enable_ssh_keysign = - 1; |
8bbc048a | 936 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 937 | options->identities_only = - 1; |
ffd7b36b | 938 | options->rekey_limit = - 1; |
21289cd0 | 939 | options->verify_host_key_dns = -1; |
5d8d32a3 | 940 | options->server_alive_interval = -1; |
941 | options->server_alive_count_max = -1; | |
61a2c1da | 942 | options->num_send_env = 0; |
5e96b616 | 943 | options->control_path = NULL; |
944 | options->control_master = -1; | |
5c63c2ab | 945 | options->hash_known_hosts = -1; |
8efc0c15 | 946 | } |
947 | ||
aa3378df | 948 | /* |
949 | * Called after processing other sources of option data, this fills those | |
950 | * options for which no value has been specified with their default values. | |
951 | */ | |
8efc0c15 | 952 | |
6ae2364d | 953 | void |
5260325f | 954 | fill_default_options(Options * options) |
8efc0c15 | 955 | { |
d2c46e77 | 956 | int len; |
957 | ||
5260325f | 958 | if (options->forward_agent == -1) |
71276795 | 959 | options->forward_agent = 0; |
5260325f | 960 | if (options->forward_x11 == -1) |
c8d54615 | 961 | options->forward_x11 = 0; |
d73a67d7 | 962 | if (options->forward_x11_trusted == -1) |
963 | options->forward_x11_trusted = 0; | |
fa649821 | 964 | if (options->xauth_location == NULL) |
fd9ede94 | 965 | options->xauth_location = _PATH_XAUTH; |
5260325f | 966 | if (options->gateway_ports == -1) |
967 | options->gateway_ports = 0; | |
968 | if (options->use_privileged_port == -1) | |
d5ebca2b | 969 | options->use_privileged_port = 0; |
5260325f | 970 | if (options->rsa_authentication == -1) |
971 | options->rsa_authentication = 1; | |
fa08c86b | 972 | if (options->pubkey_authentication == -1) |
973 | options->pubkey_authentication = 1; | |
5ba55ada | 974 | if (options->challenge_response_authentication == -1) |
10a2cbef | 975 | options->challenge_response_authentication = 1; |
7364bd04 | 976 | if (options->gss_authentication == -1) |
2ecb78df | 977 | options->gss_authentication = 0; |
7364bd04 | 978 | if (options->gss_deleg_creds == -1) |
979 | options->gss_deleg_creds = 0; | |
5260325f | 980 | if (options->password_authentication == -1) |
981 | options->password_authentication = 1; | |
94ec8c6b | 982 | if (options->kbd_interactive_authentication == -1) |
d464095c | 983 | options->kbd_interactive_authentication = 1; |
5260325f | 984 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 985 | options->rhosts_rsa_authentication = 0; |
8002af61 | 986 | if (options->hostbased_authentication == -1) |
987 | options->hostbased_authentication = 0; | |
5260325f | 988 | if (options->batch_mode == -1) |
989 | options->batch_mode = 0; | |
990 | if (options->check_host_ip == -1) | |
991 | options->check_host_ip = 1; | |
992 | if (options->strict_host_key_checking == -1) | |
993 | options->strict_host_key_checking = 2; /* 2 is default */ | |
994 | if (options->compression == -1) | |
995 | options->compression = 0; | |
fd573618 | 996 | if (options->tcp_keep_alive == -1) |
997 | options->tcp_keep_alive = 1; | |
5260325f | 998 | if (options->compression_level == -1) |
999 | options->compression_level = 6; | |
1000 | if (options->port == -1) | |
1001 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1002 | if (options->address_family == -1) |
1003 | options->address_family = AF_UNSPEC; | |
5260325f | 1004 | if (options->connection_attempts == -1) |
ce773142 | 1005 | options->connection_attempts = 1; |
5260325f | 1006 | if (options->number_of_password_prompts == -1) |
1007 | options->number_of_password_prompts = 3; | |
1008 | /* Selected in ssh_login(). */ | |
1009 | if (options->cipher == -1) | |
1010 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1011 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1012 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1013 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1014 | if (options->protocol == SSH_PROTO_UNKNOWN) |
3e587cc3 | 1015 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
5260325f | 1016 | if (options->num_identity_files == 0) { |
fa08c86b | 1017 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1018 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1019 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1020 | xmalloc(len); |
1021 | snprintf(options->identity_files[options->num_identity_files++], | |
1022 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1023 | } |
1024 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1025 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1026 | options->identity_files[options->num_identity_files] = | |
1027 | xmalloc(len); | |
1028 | snprintf(options->identity_files[options->num_identity_files++], | |
1029 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1030 | ||
d2c46e77 | 1031 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1032 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1033 | xmalloc(len); |
1034 | snprintf(options->identity_files[options->num_identity_files++], | |
1035 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1036 | } |
a306f2dd | 1037 | } |
5260325f | 1038 | if (options->escape_char == -1) |
1039 | options->escape_char = '~'; | |
1040 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1041 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1042 | if (options->user_hostfile == NULL) |
42f11eb2 | 1043 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1044 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1045 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1046 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1047 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1048 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1049 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1050 | if (options->clear_forwardings == 1) |
1051 | clear_forwardings(options); | |
8bbc048a | 1052 | if (options->no_host_authentication_for_localhost == - 1) |
1053 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1054 | if (options->identities_only == -1) |
1055 | options->identities_only = 0; | |
cc46e2ee | 1056 | if (options->enable_ssh_keysign == -1) |
1057 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1058 | if (options->rekey_limit == -1) |
1059 | options->rekey_limit = 0; | |
21289cd0 | 1060 | if (options->verify_host_key_dns == -1) |
1061 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1062 | if (options->server_alive_interval == -1) |
1063 | options->server_alive_interval = 0; | |
1064 | if (options->server_alive_count_max == -1) | |
1065 | options->server_alive_count_max = 3; | |
5e96b616 | 1066 | if (options->control_master == -1) |
1067 | options->control_master = 0; | |
5c63c2ab | 1068 | if (options->hash_known_hosts == -1) |
1069 | options->hash_known_hosts = 0; | |
5260325f | 1070 | /* options->proxy_command should not be set by default */ |
1071 | /* options->user will be set in the main program if appropriate */ | |
1072 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1073 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1074 | /* options->preferred_authentications will be set in ssh */ |
8efc0c15 | 1075 | } |
3867aa0a | 1076 | |
1077 | /* | |
1078 | * parse_forward | |
1079 | * parses a string containing a port forwarding specification of the form: | |
1080 | * [listenhost:]listenport:connecthost:connectport | |
1081 | * returns number of arguments parsed or zero on error | |
1082 | */ | |
1083 | int | |
1084 | parse_forward(Forward *fwd, const char *fwdspec) | |
1085 | { | |
1086 | int i; | |
1087 | char *p, *cp, *fwdarg[4]; | |
1088 | ||
1089 | memset(fwd, '\0', sizeof(*fwd)); | |
1090 | ||
1091 | cp = p = xstrdup(fwdspec); | |
1092 | ||
1093 | /* skip leading spaces */ | |
1094 | while (*cp && isspace(*cp)) | |
1095 | cp++; | |
1096 | ||
1097 | for (i = 0; i < 4; ++i) | |
1098 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1099 | break; | |
1100 | ||
1101 | /* Check for trailing garbage in 4-arg case*/ | |
1102 | if (cp != NULL) | |
1103 | i = 0; /* failure */ | |
1104 | ||
1105 | switch (i) { | |
1106 | case 3: | |
1107 | fwd->listen_host = NULL; | |
1108 | fwd->listen_port = a2port(fwdarg[0]); | |
1109 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1110 | fwd->connect_port = a2port(fwdarg[2]); | |
1111 | break; | |
1112 | ||
1113 | case 4: | |
1114 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1115 | fwd->listen_port = a2port(fwdarg[1]); | |
1116 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1117 | fwd->connect_port = a2port(fwdarg[3]); | |
1118 | break; | |
1119 | default: | |
1120 | i = 0; /* failure */ | |
1121 | } | |
1122 | ||
1123 | xfree(p); | |
1124 | ||
1125 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1126 | goto fail_free; | |
1127 | ||
1128 | if (fwd->connect_host != NULL && | |
1129 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1130 | goto fail_free; | |
1131 | ||
1132 | return (i); | |
1133 | ||
1134 | fail_free: | |
1135 | if (fwd->connect_host != NULL) | |
1136 | xfree(fwd->connect_host); | |
1137 | if (fwd->listen_host != NULL) | |
1138 | xfree(fwd->listen_host); | |
1139 | return (0); | |
1140 | } |