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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" | |
5c63c2ab | 15 | RCSID("$OpenBSD: readconf.c,v 1.136 2005/03/01 10:40:26 djm 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++) { |
256 | xfree(options->local_forwards[i].listen_host); | |
257 | xfree(options->local_forwards[i].connect_host); | |
258 | } | |
e1c5bfaf | 259 | options->num_local_forwards = 0; |
3867aa0a | 260 | for (i = 0; i < options->num_remote_forwards; i++) { |
261 | xfree(options->remote_forwards[i].listen_host); | |
262 | xfree(options->remote_forwards[i].connect_host); | |
263 | } | |
e1c5bfaf | 264 | options->num_remote_forwards = 0; |
265 | } | |
266 | ||
aa3378df | 267 | /* |
6be9a5e8 | 268 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 269 | */ |
8efc0c15 | 270 | |
6ae2364d | 271 | static OpCodes |
5260325f | 272 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 273 | { |
1e3b8b07 | 274 | u_int i; |
8efc0c15 | 275 | |
5260325f | 276 | for (i = 0; keywords[i].name; i++) |
aa3378df | 277 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 278 | return keywords[i].opcode; |
8efc0c15 | 279 | |
b7c70970 | 280 | error("%s: line %d: Bad configuration option: %s", |
281 | filename, linenum, cp); | |
5260325f | 282 | return oBadOption; |
8efc0c15 | 283 | } |
284 | ||
aa3378df | 285 | /* |
286 | * Processes a single option line as used in the configuration files. This | |
287 | * only sets those values that have not already been set. | |
288 | */ | |
d718e75d | 289 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 290 | |
e7c0f9d5 | 291 | int |
292 | process_config_line(Options *options, const char *host, | |
5260325f | 293 | char *line, const char *filename, int linenum, |
294 | int *activep) | |
8efc0c15 | 295 | { |
3867aa0a | 296 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
57112b5a | 297 | int opcode, *intptr, value; |
d718e75d | 298 | size_t len; |
3867aa0a | 299 | Forward fwd; |
5260325f | 300 | |
204fde99 | 301 | /* Strip trailing whitespace */ |
302 | for(len = strlen(line) - 1; len > 0; len--) { | |
303 | if (strchr(WHITESPACE, line[len]) == NULL) | |
304 | break; | |
305 | line[len] = '\0'; | |
306 | } | |
307 | ||
704b1659 | 308 | s = line; |
309 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
310 | keyword = strdelim(&s); | |
311 | /* Ignore leading whitespace. */ | |
312 | if (*keyword == '\0') | |
313 | keyword = strdelim(&s); | |
42f11eb2 | 314 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 315 | return 0; |
316 | ||
089fbbd2 | 317 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 318 | |
319 | switch (opcode) { | |
320 | case oBadOption: | |
aa3378df | 321 | /* don't panic, but count bad options */ |
322 | return -1; | |
5260325f | 323 | /* NOTREACHED */ |
09ab3296 | 324 | case oConnectTimeout: |
325 | intptr = &options->connection_timeout; | |
5d8d32a3 | 326 | parse_time: |
09ab3296 | 327 | arg = strdelim(&s); |
328 | if (!arg || *arg == '\0') | |
329 | fatal("%s line %d: missing time value.", | |
330 | filename, linenum); | |
331 | if ((value = convtime(arg)) == -1) | |
332 | fatal("%s line %d: invalid time value.", | |
333 | filename, linenum); | |
334 | if (*intptr == -1) | |
335 | *intptr = value; | |
336 | break; | |
337 | ||
5260325f | 338 | case oForwardAgent: |
339 | intptr = &options->forward_agent; | |
340 | parse_flag: | |
704b1659 | 341 | arg = strdelim(&s); |
089fbbd2 | 342 | if (!arg || *arg == '\0') |
5260325f | 343 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
344 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 345 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 346 | value = 1; |
089fbbd2 | 347 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 348 | value = 0; |
349 | else | |
350 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
351 | if (*activep && *intptr == -1) | |
352 | *intptr = value; | |
353 | break; | |
354 | ||
355 | case oForwardX11: | |
356 | intptr = &options->forward_x11; | |
357 | goto parse_flag; | |
358 | ||
d73a67d7 | 359 | case oForwardX11Trusted: |
360 | intptr = &options->forward_x11_trusted; | |
361 | goto parse_flag; | |
362 | ||
5260325f | 363 | case oGatewayPorts: |
364 | intptr = &options->gateway_ports; | |
365 | goto parse_flag; | |
366 | ||
367 | case oUsePrivilegedPort: | |
368 | intptr = &options->use_privileged_port; | |
369 | goto parse_flag; | |
370 | ||
5260325f | 371 | case oPasswordAuthentication: |
372 | intptr = &options->password_authentication; | |
373 | goto parse_flag; | |
374 | ||
94ec8c6b | 375 | case oKbdInteractiveAuthentication: |
376 | intptr = &options->kbd_interactive_authentication; | |
377 | goto parse_flag; | |
378 | ||
379 | case oKbdInteractiveDevices: | |
380 | charptr = &options->kbd_interactive_devices; | |
381 | goto parse_string; | |
382 | ||
fa08c86b | 383 | case oPubkeyAuthentication: |
384 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 385 | goto parse_flag; |
386 | ||
5260325f | 387 | case oRSAAuthentication: |
388 | intptr = &options->rsa_authentication; | |
389 | goto parse_flag; | |
390 | ||
391 | case oRhostsRSAAuthentication: | |
392 | intptr = &options->rhosts_rsa_authentication; | |
393 | goto parse_flag; | |
394 | ||
8002af61 | 395 | case oHostbasedAuthentication: |
396 | intptr = &options->hostbased_authentication; | |
397 | goto parse_flag; | |
398 | ||
d464095c | 399 | case oChallengeResponseAuthentication: |
5ba55ada | 400 | intptr = &options->challenge_response_authentication; |
5260325f | 401 | goto parse_flag; |
d0ec7f42 | 402 | |
7364bd04 | 403 | case oGssAuthentication: |
404 | intptr = &options->gss_authentication; | |
405 | goto parse_flag; | |
406 | ||
407 | case oGssDelegateCreds: | |
408 | intptr = &options->gss_deleg_creds; | |
409 | goto parse_flag; | |
410 | ||
5260325f | 411 | case oBatchMode: |
412 | intptr = &options->batch_mode; | |
413 | goto parse_flag; | |
414 | ||
415 | case oCheckHostIP: | |
416 | intptr = &options->check_host_ip; | |
417 | goto parse_flag; | |
418 | ||
21289cd0 | 419 | case oVerifyHostKeyDNS: |
420 | intptr = &options->verify_host_key_dns; | |
0161a13d | 421 | goto parse_yesnoask; |
21289cd0 | 422 | |
5260325f | 423 | case oStrictHostKeyChecking: |
424 | intptr = &options->strict_host_key_checking; | |
0161a13d | 425 | parse_yesnoask: |
704b1659 | 426 | arg = strdelim(&s); |
089fbbd2 | 427 | if (!arg || *arg == '\0') |
c76c8819 | 428 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 429 | filename, linenum); |
5260325f | 430 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 431 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 432 | value = 1; |
089fbbd2 | 433 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 434 | value = 0; |
089fbbd2 | 435 | else if (strcmp(arg, "ask") == 0) |
5260325f | 436 | value = 2; |
437 | else | |
438 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
439 | if (*activep && *intptr == -1) | |
440 | *intptr = value; | |
441 | break; | |
442 | ||
443 | case oCompression: | |
444 | intptr = &options->compression; | |
445 | goto parse_flag; | |
446 | ||
fd573618 | 447 | case oTCPKeepAlive: |
448 | intptr = &options->tcp_keep_alive; | |
5260325f | 449 | goto parse_flag; |
450 | ||
8bbc048a | 451 | case oNoHostAuthenticationForLocalhost: |
452 | intptr = &options->no_host_authentication_for_localhost; | |
453 | goto parse_flag; | |
454 | ||
5260325f | 455 | case oNumberOfPasswordPrompts: |
456 | intptr = &options->number_of_password_prompts; | |
457 | goto parse_int; | |
458 | ||
459 | case oCompressionLevel: | |
460 | intptr = &options->compression_level; | |
461 | goto parse_int; | |
462 | ||
ffd7b36b | 463 | case oRekeyLimit: |
464 | intptr = &options->rekey_limit; | |
465 | arg = strdelim(&s); | |
466 | if (!arg || *arg == '\0') | |
467 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
468 | if (arg[0] < '0' || arg[0] > '9') | |
469 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
470 | value = strtol(arg, &endofnumber, 10); | |
471 | if (arg == endofnumber) | |
472 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
473 | switch (toupper(*endofnumber)) { | |
474 | case 'K': | |
475 | value *= 1<<10; | |
476 | break; | |
477 | case 'M': | |
478 | value *= 1<<20; | |
479 | break; | |
480 | case 'G': | |
481 | value *= 1<<30; | |
482 | break; | |
483 | } | |
484 | if (*activep && *intptr == -1) | |
485 | *intptr = value; | |
486 | break; | |
487 | ||
5260325f | 488 | case oIdentityFile: |
704b1659 | 489 | arg = strdelim(&s); |
089fbbd2 | 490 | if (!arg || *arg == '\0') |
5260325f | 491 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
492 | if (*activep) { | |
fa08c86b | 493 | intptr = &options->num_identity_files; |
a306f2dd | 494 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 495 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 496 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
fa08c86b | 497 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 498 | *charptr = xstrdup(arg); |
a306f2dd | 499 | *intptr = *intptr + 1; |
5260325f | 500 | } |
501 | break; | |
502 | ||
fa649821 | 503 | case oXAuthLocation: |
504 | charptr=&options->xauth_location; | |
505 | goto parse_string; | |
506 | ||
5260325f | 507 | case oUser: |
508 | charptr = &options->user; | |
509 | parse_string: | |
704b1659 | 510 | arg = strdelim(&s); |
089fbbd2 | 511 | if (!arg || *arg == '\0') |
5260325f | 512 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
513 | if (*activep && *charptr == NULL) | |
089fbbd2 | 514 | *charptr = xstrdup(arg); |
5260325f | 515 | break; |
516 | ||
517 | case oGlobalKnownHostsFile: | |
518 | charptr = &options->system_hostfile; | |
519 | goto parse_string; | |
520 | ||
521 | case oUserKnownHostsFile: | |
522 | charptr = &options->user_hostfile; | |
523 | goto parse_string; | |
524 | ||
a306f2dd | 525 | case oGlobalKnownHostsFile2: |
526 | charptr = &options->system_hostfile2; | |
527 | goto parse_string; | |
528 | ||
529 | case oUserKnownHostsFile2: | |
530 | charptr = &options->user_hostfile2; | |
531 | goto parse_string; | |
532 | ||
5260325f | 533 | case oHostName: |
534 | charptr = &options->hostname; | |
535 | goto parse_string; | |
536 | ||
8abcdba4 | 537 | case oHostKeyAlias: |
538 | charptr = &options->host_key_alias; | |
539 | goto parse_string; | |
540 | ||
cab80f75 | 541 | case oPreferredAuthentications: |
542 | charptr = &options->preferred_authentications; | |
543 | goto parse_string; | |
544 | ||
3435f5a6 | 545 | case oBindAddress: |
546 | charptr = &options->bind_address; | |
547 | goto parse_string; | |
548 | ||
eea098a3 | 549 | case oSmartcardDevice: |
9ff6f66f | 550 | charptr = &options->smartcard_device; |
551 | goto parse_string; | |
eea098a3 | 552 | |
5260325f | 553 | case oProxyCommand: |
2d9c1828 | 554 | if (s == NULL) |
555 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
5260325f | 556 | charptr = &options->proxy_command; |
d718e75d | 557 | len = strspn(s, WHITESPACE "="); |
5260325f | 558 | if (*activep && *charptr == NULL) |
d718e75d | 559 | *charptr = xstrdup(s + len); |
5260325f | 560 | return 0; |
561 | ||
562 | case oPort: | |
563 | intptr = &options->port; | |
564 | parse_int: | |
704b1659 | 565 | arg = strdelim(&s); |
089fbbd2 | 566 | if (!arg || *arg == '\0') |
5260325f | 567 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 568 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 569 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 570 | |
571 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 572 | value = strtol(arg, &endofnumber, 0); |
573 | if (arg == endofnumber) | |
aa3378df | 574 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 575 | if (*activep && *intptr == -1) |
576 | *intptr = value; | |
577 | break; | |
578 | ||
579 | case oConnectionAttempts: | |
580 | intptr = &options->connection_attempts; | |
581 | goto parse_int; | |
582 | ||
583 | case oCipher: | |
584 | intptr = &options->cipher; | |
704b1659 | 585 | arg = strdelim(&s); |
089fbbd2 | 586 | if (!arg || *arg == '\0') |
71276795 | 587 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 588 | value = cipher_number(arg); |
5260325f | 589 | if (value == -1) |
590 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 591 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 592 | if (*activep && *intptr == -1) |
593 | *intptr = value; | |
594 | break; | |
595 | ||
a8be9f80 | 596 | case oCiphers: |
704b1659 | 597 | arg = strdelim(&s); |
089fbbd2 | 598 | if (!arg || *arg == '\0') |
71276795 | 599 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 600 | if (!ciphers_valid(arg)) |
d0c832f3 | 601 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 602 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 603 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 604 | options->ciphers = xstrdup(arg); |
a8be9f80 | 605 | break; |
606 | ||
b2552997 | 607 | case oMacs: |
608 | arg = strdelim(&s); | |
609 | if (!arg || *arg == '\0') | |
610 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
611 | if (!mac_valid(arg)) | |
612 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 613 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 614 | if (*activep && options->macs == NULL) |
615 | options->macs = xstrdup(arg); | |
616 | break; | |
617 | ||
e961a8f9 | 618 | case oHostKeyAlgorithms: |
619 | arg = strdelim(&s); | |
620 | if (!arg || *arg == '\0') | |
621 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
622 | if (!key_names_valid2(arg)) | |
623 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 624 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 625 | if (*activep && options->hostkeyalgorithms == NULL) |
626 | options->hostkeyalgorithms = xstrdup(arg); | |
627 | break; | |
628 | ||
a8be9f80 | 629 | case oProtocol: |
630 | intptr = &options->protocol; | |
704b1659 | 631 | arg = strdelim(&s); |
089fbbd2 | 632 | if (!arg || *arg == '\0') |
71276795 | 633 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 634 | value = proto_spec(arg); |
a8be9f80 | 635 | if (value == SSH_PROTO_UNKNOWN) |
636 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 637 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 638 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
639 | *intptr = value; | |
640 | break; | |
641 | ||
5260325f | 642 | case oLogLevel: |
643 | intptr = (int *) &options->log_level; | |
704b1659 | 644 | arg = strdelim(&s); |
089fbbd2 | 645 | value = log_level_number(arg); |
5eaf8578 | 646 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 647 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 648 | filename, linenum, arg ? arg : "<NONE>"); |
5eaf8578 | 649 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) |
5260325f | 650 | *intptr = (LogLevel) value; |
651 | break; | |
652 | ||
5260325f | 653 | case oLocalForward: |
3a8aabf0 | 654 | case oRemoteForward: |
704b1659 | 655 | arg = strdelim(&s); |
3867aa0a | 656 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 657 | fatal("%.200s line %d: Missing port argument.", |
658 | filename, linenum); | |
3867aa0a | 659 | arg2 = strdelim(&s); |
660 | if (arg2 == NULL || *arg2 == '\0') | |
661 | fatal("%.200s line %d: Missing target argument.", | |
3a8aabf0 | 662 | filename, linenum); |
3867aa0a | 663 | |
664 | /* construct a string for parse_forward */ | |
665 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
666 | ||
667 | if (parse_forward(&fwd, fwdarg) == 0) | |
3a8aabf0 | 668 | fatal("%.200s line %d: Bad forwarding specification.", |
669 | filename, linenum); | |
3867aa0a | 670 | |
3a8aabf0 | 671 | if (*activep) { |
672 | if (opcode == oLocalForward) | |
3867aa0a | 673 | add_local_forward(options, &fwd); |
3a8aabf0 | 674 | else if (opcode == oRemoteForward) |
3867aa0a | 675 | add_remote_forward(options, &fwd); |
3a8aabf0 | 676 | } |
5260325f | 677 | break; |
678 | ||
0490e609 | 679 | case oDynamicForward: |
680 | arg = strdelim(&s); | |
681 | if (!arg || *arg == '\0') | |
682 | fatal("%.200s line %d: Missing port argument.", | |
683 | filename, linenum); | |
3867aa0a | 684 | memset(&fwd, '\0', sizeof(fwd)); |
685 | fwd.connect_host = "socks"; | |
686 | fwd.listen_host = hpdelim(&arg); | |
687 | if (fwd.listen_host == NULL || | |
688 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
689 | fatal("%.200s line %d: Bad forwarding specification.", | |
690 | filename, linenum); | |
691 | if (arg) { | |
692 | fwd.listen_port = a2port(arg); | |
693 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
694 | } else { | |
695 | fwd.listen_port = a2port(fwd.listen_host); | |
696 | fwd.listen_host = ""; | |
697 | } | |
698 | if (fwd.listen_port == 0) | |
0490e609 | 699 | fatal("%.200s line %d: Badly formatted port number.", |
700 | filename, linenum); | |
14e4a15f | 701 | if (*activep) |
3867aa0a | 702 | add_local_forward(options, &fwd); |
8002af61 | 703 | break; |
0490e609 | 704 | |
e1c5bfaf | 705 | case oClearAllForwardings: |
706 | intptr = &options->clear_forwardings; | |
707 | goto parse_flag; | |
708 | ||
5260325f | 709 | case oHost: |
710 | *activep = 0; | |
704b1659 | 711 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 712 | if (match_pattern(host, arg)) { |
713 | debug("Applying options for %.100s", arg); | |
5260325f | 714 | *activep = 1; |
715 | break; | |
716 | } | |
704b1659 | 717 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 718 | return 0; |
719 | ||
720 | case oEscapeChar: | |
721 | intptr = &options->escape_char; | |
704b1659 | 722 | arg = strdelim(&s); |
089fbbd2 | 723 | if (!arg || *arg == '\0') |
5260325f | 724 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 725 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 726 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
727 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 728 | else if (strlen(arg) == 1) |
1e3b8b07 | 729 | value = (u_char) arg[0]; |
089fbbd2 | 730 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 731 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 732 | else { |
733 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 734 | filename, linenum); |
5260325f | 735 | /* NOTREACHED */ |
736 | value = 0; /* Avoid compiler warning. */ | |
737 | } | |
738 | if (*activep && *intptr == -1) | |
739 | *intptr = value; | |
740 | break; | |
741 | ||
f811e52a | 742 | case oAddressFamily: |
743 | arg = strdelim(&s); | |
1572b90f | 744 | intptr = &options->address_family; |
f811e52a | 745 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 746 | value = AF_INET; |
f811e52a | 747 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 748 | value = AF_INET6; |
f811e52a | 749 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 750 | value = AF_UNSPEC; |
f811e52a | 751 | else |
752 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 753 | if (*activep && *intptr == -1) |
754 | *intptr = value; | |
f811e52a | 755 | break; |
756 | ||
cc46e2ee | 757 | case oEnableSSHKeysign: |
758 | intptr = &options->enable_ssh_keysign; | |
759 | goto parse_flag; | |
760 | ||
3a065ed0 | 761 | case oIdentitiesOnly: |
762 | intptr = &options->identities_only; | |
763 | goto parse_flag; | |
764 | ||
5d8d32a3 | 765 | case oServerAliveInterval: |
766 | intptr = &options->server_alive_interval; | |
767 | goto parse_time; | |
768 | ||
769 | case oServerAliveCountMax: | |
770 | intptr = &options->server_alive_count_max; | |
771 | goto parse_int; | |
772 | ||
61a2c1da | 773 | case oSendEnv: |
774 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
775 | if (strchr(arg, '=') != NULL) | |
776 | fatal("%s line %d: Invalid environment name.", | |
777 | filename, linenum); | |
778 | if (options->num_send_env >= MAX_SEND_ENV) | |
779 | fatal("%s line %d: too many send env.", | |
780 | filename, linenum); | |
781 | options->send_env[options->num_send_env++] = | |
782 | xstrdup(arg); | |
783 | } | |
784 | break; | |
785 | ||
5e96b616 | 786 | case oControlPath: |
787 | charptr = &options->control_path; | |
788 | goto parse_string; | |
789 | ||
790 | case oControlMaster: | |
791 | intptr = &options->control_master; | |
0d34d6ce | 792 | goto parse_yesnoask; |
5e96b616 | 793 | |
5c63c2ab | 794 | case oHashKnownHosts: |
795 | intptr = &options->hash_known_hosts; | |
796 | goto parse_flag; | |
797 | ||
80fcb74e | 798 | case oDeprecated: |
4feae93d | 799 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 800 | filename, linenum, keyword); |
4feae93d | 801 | return 0; |
80fcb74e | 802 | |
a2144546 | 803 | case oUnsupported: |
804 | error("%s line %d: Unsupported option \"%s\"", | |
805 | filename, linenum, keyword); | |
806 | return 0; | |
807 | ||
5260325f | 808 | default: |
809 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
810 | } | |
811 | ||
812 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 813 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 814 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
184eed6a | 815 | filename, linenum, arg); |
089fbbd2 | 816 | } |
5260325f | 817 | return 0; |
8efc0c15 | 818 | } |
819 | ||
820 | ||
aa3378df | 821 | /* |
822 | * Reads the config file and modifies the options accordingly. Options | |
823 | * should already be initialized before this call. This never returns if | |
93111dfa | 824 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 825 | */ |
8efc0c15 | 826 | |
93111dfa | 827 | int |
f2107e97 | 828 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 829 | int checkperm) |
8efc0c15 | 830 | { |
5260325f | 831 | FILE *f; |
832 | char line[1024]; | |
833 | int active, linenum; | |
834 | int bad_options = 0; | |
835 | ||
836 | /* Open the file. */ | |
9f6cab4b | 837 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 838 | return 0; |
5260325f | 839 | |
9f6cab4b | 840 | if (checkperm) { |
841 | struct stat sb; | |
f2107e97 | 842 | |
f9ee425b | 843 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 844 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 845 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 846 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 847 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 848 | } |
849 | ||
5260325f | 850 | debug("Reading configuration data %.200s", filename); |
851 | ||
aa3378df | 852 | /* |
853 | * Mark that we are now processing the options. This flag is turned | |
854 | * on/off by Host specifications. | |
855 | */ | |
5260325f | 856 | active = 1; |
857 | linenum = 0; | |
858 | while (fgets(line, sizeof(line), f)) { | |
859 | /* Update line number counter. */ | |
860 | linenum++; | |
861 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
862 | bad_options++; | |
863 | } | |
864 | fclose(f); | |
865 | if (bad_options > 0) | |
54b974dc | 866 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 867 | filename, bad_options); |
93111dfa | 868 | return 1; |
8efc0c15 | 869 | } |
870 | ||
aa3378df | 871 | /* |
872 | * Initializes options to special values that indicate that they have not yet | |
873 | * been set. Read_config_file will only set options with this value. Options | |
874 | * are processed in the following order: command line, user config file, | |
875 | * system config file. Last, fill_default_options is called. | |
876 | */ | |
8efc0c15 | 877 | |
6ae2364d | 878 | void |
5260325f | 879 | initialize_options(Options * options) |
8efc0c15 | 880 | { |
5260325f | 881 | memset(options, 'X', sizeof(*options)); |
882 | options->forward_agent = -1; | |
883 | options->forward_x11 = -1; | |
d73a67d7 | 884 | options->forward_x11_trusted = -1; |
fa649821 | 885 | options->xauth_location = NULL; |
5260325f | 886 | options->gateway_ports = -1; |
887 | options->use_privileged_port = -1; | |
5260325f | 888 | options->rsa_authentication = -1; |
fa08c86b | 889 | options->pubkey_authentication = -1; |
5ba55ada | 890 | options->challenge_response_authentication = -1; |
7364bd04 | 891 | options->gss_authentication = -1; |
892 | options->gss_deleg_creds = -1; | |
5260325f | 893 | options->password_authentication = -1; |
94ec8c6b | 894 | options->kbd_interactive_authentication = -1; |
895 | options->kbd_interactive_devices = NULL; | |
5260325f | 896 | options->rhosts_rsa_authentication = -1; |
8002af61 | 897 | options->hostbased_authentication = -1; |
5260325f | 898 | options->batch_mode = -1; |
899 | options->check_host_ip = -1; | |
900 | options->strict_host_key_checking = -1; | |
901 | options->compression = -1; | |
fd573618 | 902 | options->tcp_keep_alive = -1; |
5260325f | 903 | options->compression_level = -1; |
904 | options->port = -1; | |
1572b90f | 905 | options->address_family = -1; |
5260325f | 906 | options->connection_attempts = -1; |
09ab3296 | 907 | options->connection_timeout = -1; |
5260325f | 908 | options->number_of_password_prompts = -1; |
909 | options->cipher = -1; | |
a8be9f80 | 910 | options->ciphers = NULL; |
b2552997 | 911 | options->macs = NULL; |
e961a8f9 | 912 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 913 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 914 | options->num_identity_files = 0; |
915 | options->hostname = NULL; | |
8abcdba4 | 916 | options->host_key_alias = NULL; |
5260325f | 917 | options->proxy_command = NULL; |
918 | options->user = NULL; | |
919 | options->escape_char = -1; | |
920 | options->system_hostfile = NULL; | |
921 | options->user_hostfile = NULL; | |
a306f2dd | 922 | options->system_hostfile2 = NULL; |
923 | options->user_hostfile2 = NULL; | |
5260325f | 924 | options->num_local_forwards = 0; |
925 | options->num_remote_forwards = 0; | |
e1c5bfaf | 926 | options->clear_forwardings = -1; |
5eaf8578 | 927 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 928 | options->preferred_authentications = NULL; |
3435f5a6 | 929 | options->bind_address = NULL; |
9ff6f66f | 930 | options->smartcard_device = NULL; |
cc46e2ee | 931 | options->enable_ssh_keysign = - 1; |
8bbc048a | 932 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 933 | options->identities_only = - 1; |
ffd7b36b | 934 | options->rekey_limit = - 1; |
21289cd0 | 935 | options->verify_host_key_dns = -1; |
5d8d32a3 | 936 | options->server_alive_interval = -1; |
937 | options->server_alive_count_max = -1; | |
61a2c1da | 938 | options->num_send_env = 0; |
5e96b616 | 939 | options->control_path = NULL; |
940 | options->control_master = -1; | |
5c63c2ab | 941 | options->hash_known_hosts = -1; |
8efc0c15 | 942 | } |
943 | ||
aa3378df | 944 | /* |
945 | * Called after processing other sources of option data, this fills those | |
946 | * options for which no value has been specified with their default values. | |
947 | */ | |
8efc0c15 | 948 | |
6ae2364d | 949 | void |
5260325f | 950 | fill_default_options(Options * options) |
8efc0c15 | 951 | { |
d2c46e77 | 952 | int len; |
953 | ||
5260325f | 954 | if (options->forward_agent == -1) |
71276795 | 955 | options->forward_agent = 0; |
5260325f | 956 | if (options->forward_x11 == -1) |
c8d54615 | 957 | options->forward_x11 = 0; |
d73a67d7 | 958 | if (options->forward_x11_trusted == -1) |
959 | options->forward_x11_trusted = 0; | |
fa649821 | 960 | if (options->xauth_location == NULL) |
fd9ede94 | 961 | options->xauth_location = _PATH_XAUTH; |
5260325f | 962 | if (options->gateway_ports == -1) |
963 | options->gateway_ports = 0; | |
964 | if (options->use_privileged_port == -1) | |
d5ebca2b | 965 | options->use_privileged_port = 0; |
5260325f | 966 | if (options->rsa_authentication == -1) |
967 | options->rsa_authentication = 1; | |
fa08c86b | 968 | if (options->pubkey_authentication == -1) |
969 | options->pubkey_authentication = 1; | |
5ba55ada | 970 | if (options->challenge_response_authentication == -1) |
10a2cbef | 971 | options->challenge_response_authentication = 1; |
7364bd04 | 972 | if (options->gss_authentication == -1) |
2ecb78df | 973 | options->gss_authentication = 0; |
7364bd04 | 974 | if (options->gss_deleg_creds == -1) |
975 | options->gss_deleg_creds = 0; | |
5260325f | 976 | if (options->password_authentication == -1) |
977 | options->password_authentication = 1; | |
94ec8c6b | 978 | if (options->kbd_interactive_authentication == -1) |
d464095c | 979 | options->kbd_interactive_authentication = 1; |
5260325f | 980 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 981 | options->rhosts_rsa_authentication = 0; |
8002af61 | 982 | if (options->hostbased_authentication == -1) |
983 | options->hostbased_authentication = 0; | |
5260325f | 984 | if (options->batch_mode == -1) |
985 | options->batch_mode = 0; | |
986 | if (options->check_host_ip == -1) | |
987 | options->check_host_ip = 1; | |
988 | if (options->strict_host_key_checking == -1) | |
989 | options->strict_host_key_checking = 2; /* 2 is default */ | |
990 | if (options->compression == -1) | |
991 | options->compression = 0; | |
fd573618 | 992 | if (options->tcp_keep_alive == -1) |
993 | options->tcp_keep_alive = 1; | |
5260325f | 994 | if (options->compression_level == -1) |
995 | options->compression_level = 6; | |
996 | if (options->port == -1) | |
997 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 998 | if (options->address_family == -1) |
999 | options->address_family = AF_UNSPEC; | |
5260325f | 1000 | if (options->connection_attempts == -1) |
ce773142 | 1001 | options->connection_attempts = 1; |
5260325f | 1002 | if (options->number_of_password_prompts == -1) |
1003 | options->number_of_password_prompts = 3; | |
1004 | /* Selected in ssh_login(). */ | |
1005 | if (options->cipher == -1) | |
1006 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1007 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1008 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1009 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1010 | if (options->protocol == SSH_PROTO_UNKNOWN) |
3e587cc3 | 1011 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
5260325f | 1012 | if (options->num_identity_files == 0) { |
fa08c86b | 1013 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1014 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1015 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1016 | xmalloc(len); |
1017 | snprintf(options->identity_files[options->num_identity_files++], | |
1018 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1019 | } |
1020 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1021 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1022 | options->identity_files[options->num_identity_files] = | |
1023 | xmalloc(len); | |
1024 | snprintf(options->identity_files[options->num_identity_files++], | |
1025 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1026 | ||
d2c46e77 | 1027 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1028 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1029 | xmalloc(len); |
1030 | snprintf(options->identity_files[options->num_identity_files++], | |
1031 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1032 | } |
a306f2dd | 1033 | } |
5260325f | 1034 | if (options->escape_char == -1) |
1035 | options->escape_char = '~'; | |
1036 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1037 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1038 | if (options->user_hostfile == NULL) |
42f11eb2 | 1039 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1040 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1041 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1042 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1043 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1044 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1045 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1046 | if (options->clear_forwardings == 1) |
1047 | clear_forwardings(options); | |
8bbc048a | 1048 | if (options->no_host_authentication_for_localhost == - 1) |
1049 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1050 | if (options->identities_only == -1) |
1051 | options->identities_only = 0; | |
cc46e2ee | 1052 | if (options->enable_ssh_keysign == -1) |
1053 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1054 | if (options->rekey_limit == -1) |
1055 | options->rekey_limit = 0; | |
21289cd0 | 1056 | if (options->verify_host_key_dns == -1) |
1057 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1058 | if (options->server_alive_interval == -1) |
1059 | options->server_alive_interval = 0; | |
1060 | if (options->server_alive_count_max == -1) | |
1061 | options->server_alive_count_max = 3; | |
5e96b616 | 1062 | if (options->control_master == -1) |
1063 | options->control_master = 0; | |
5c63c2ab | 1064 | if (options->hash_known_hosts == -1) |
1065 | options->hash_known_hosts = 0; | |
5260325f | 1066 | /* options->proxy_command should not be set by default */ |
1067 | /* options->user will be set in the main program if appropriate */ | |
1068 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1069 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1070 | /* options->preferred_authentications will be set in ssh */ |
8efc0c15 | 1071 | } |
3867aa0a | 1072 | |
1073 | /* | |
1074 | * parse_forward | |
1075 | * parses a string containing a port forwarding specification of the form: | |
1076 | * [listenhost:]listenport:connecthost:connectport | |
1077 | * returns number of arguments parsed or zero on error | |
1078 | */ | |
1079 | int | |
1080 | parse_forward(Forward *fwd, const char *fwdspec) | |
1081 | { | |
1082 | int i; | |
1083 | char *p, *cp, *fwdarg[4]; | |
1084 | ||
1085 | memset(fwd, '\0', sizeof(*fwd)); | |
1086 | ||
1087 | cp = p = xstrdup(fwdspec); | |
1088 | ||
1089 | /* skip leading spaces */ | |
1090 | while (*cp && isspace(*cp)) | |
1091 | cp++; | |
1092 | ||
1093 | for (i = 0; i < 4; ++i) | |
1094 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1095 | break; | |
1096 | ||
1097 | /* Check for trailing garbage in 4-arg case*/ | |
1098 | if (cp != NULL) | |
1099 | i = 0; /* failure */ | |
1100 | ||
1101 | switch (i) { | |
1102 | case 3: | |
1103 | fwd->listen_host = NULL; | |
1104 | fwd->listen_port = a2port(fwdarg[0]); | |
1105 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1106 | fwd->connect_port = a2port(fwdarg[2]); | |
1107 | break; | |
1108 | ||
1109 | case 4: | |
1110 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1111 | fwd->listen_port = a2port(fwdarg[1]); | |
1112 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1113 | fwd->connect_port = a2port(fwdarg[3]); | |
1114 | break; | |
1115 | default: | |
1116 | i = 0; /* failure */ | |
1117 | } | |
1118 | ||
1119 | xfree(p); | |
1120 | ||
1121 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1122 | goto fail_free; | |
1123 | ||
1124 | if (fwd->connect_host != NULL && | |
1125 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1126 | goto fail_free; | |
1127 | ||
1128 | return (i); | |
1129 | ||
1130 | fail_free: | |
1131 | if (fwd->connect_host != NULL) | |
1132 | xfree(fwd->connect_host); | |
1133 | if (fwd->listen_host != NULL) | |
1134 | xfree(fwd->listen_host); | |
1135 | return (0); | |
1136 | } |