]>
Commit | Line | Data |
---|---|---|
cf851879 | 1 | /* $OpenBSD: readconf.c,v 1.158 2006/08/01 23:22:47 stevesk Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
5 | * All rights reserved | |
5260325f | 6 | * Functions for reading the configuration files. |
6ae2364d | 7 | * |
bcbf86ec | 8 | * As far as I am concerned, the code I have written for this software |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 13 | */ |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
4095f623 | 16 | |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
9794d008 | 19 | #include <sys/socket.h> |
20 | ||
21 | #include <netinet/in.h> | |
8efc0c15 | 22 | |
b6438382 | 23 | #include <ctype.h> |
028094f4 | 24 | #include <errno.h> |
28cb0a43 | 25 | #include <netdb.h> |
cf851879 | 26 | #include <stdio.h> |
00146caa | 27 | #include <string.h> |
5188ba17 | 28 | #include <unistd.h> |
b6438382 | 29 | |
8efc0c15 | 30 | #include "ssh.h" |
8efc0c15 | 31 | #include "xmalloc.h" |
a8be9f80 | 32 | #include "compat.h" |
42f11eb2 | 33 | #include "cipher.h" |
34 | #include "pathnames.h" | |
35 | #include "log.h" | |
36 | #include "readconf.h" | |
37 | #include "match.h" | |
38 | #include "misc.h" | |
b2552997 | 39 | #include "kex.h" |
40 | #include "mac.h" | |
8efc0c15 | 41 | |
42 | /* Format of the configuration file: | |
43 | ||
44 | # Configuration data is parsed as follows: | |
45 | # 1. command line options | |
46 | # 2. user-specific file | |
47 | # 3. system-wide file | |
48 | # Any configuration value is only changed the first time it is set. | |
49 | # Thus, host-specific definitions should be at the beginning of the | |
50 | # configuration file, and defaults at the end. | |
51 | ||
52 | # Host-specific declarations. These may override anything above. A single | |
53 | # host may match multiple declarations; these are processed in the order | |
54 | # that they are given in. | |
55 | ||
56 | Host *.ngs.fi ngs.fi | |
80fcb74e | 57 | User foo |
8efc0c15 | 58 | |
59 | Host fake.com | |
60 | HostName another.host.name.real.org | |
61 | User blaah | |
62 | Port 34289 | |
63 | ForwardX11 no | |
64 | ForwardAgent no | |
65 | ||
66 | Host books.com | |
67 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
68 | Cipher 3des | |
69 | ||
70 | Host fascist.blob.com | |
71 | Port 23123 | |
72 | User tylonen | |
8efc0c15 | 73 | PasswordAuthentication no |
74 | ||
75 | Host puukko.hut.fi | |
76 | User t35124p | |
77 | ProxyCommand ssh-proxy %h %p | |
78 | ||
79 | Host *.fr | |
80fcb74e | 80 | PublicKeyAuthentication no |
8efc0c15 | 81 | |
82 | Host *.su | |
83 | Cipher none | |
84 | PasswordAuthentication no | |
85 | ||
d20f3c9e | 86 | Host vpn.fake.com |
87 | Tunnel yes | |
88 | TunnelDevice 3 | |
89 | ||
8efc0c15 | 90 | # Defaults for various options |
91 | Host * | |
92 | ForwardAgent no | |
fa08c86b | 93 | ForwardX11 no |
8efc0c15 | 94 | PasswordAuthentication yes |
95 | RSAAuthentication yes | |
96 | RhostsRSAAuthentication yes | |
8efc0c15 | 97 | StrictHostKeyChecking yes |
fd573618 | 98 | TcpKeepAlive no |
8efc0c15 | 99 | IdentityFile ~/.ssh/identity |
100 | Port 22 | |
101 | EscapeChar ~ | |
102 | ||
103 | */ | |
104 | ||
105 | /* Keyword tokens. */ | |
106 | ||
5260325f | 107 | typedef enum { |
108 | oBadOption, | |
d73a67d7 | 109 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
42ea6f5e | 110 | oExitOnForwardFailure, |
7203d6bb | 111 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 112 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 113 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
114 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
115 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
116 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 117 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 118 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 119 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 120 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 121 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 122 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 123 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 124 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 125 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 126 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 127 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
d20f3c9e | 128 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
a2144546 | 129 | oDeprecated, oUnsupported |
8efc0c15 | 130 | } OpCodes; |
131 | ||
132 | /* Textual representations of the tokens. */ | |
133 | ||
5260325f | 134 | static struct { |
135 | const char *name; | |
136 | OpCodes opcode; | |
137 | } keywords[] = { | |
138 | { "forwardagent", oForwardAgent }, | |
139 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 140 | { "forwardx11trusted", oForwardX11Trusted }, |
42ea6f5e | 141 | { "exitonforwardfailure", oExitOnForwardFailure }, |
fa649821 | 142 | { "xauthlocation", oXAuthLocation }, |
5260325f | 143 | { "gatewayports", oGatewayPorts }, |
144 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 145 | { "rhostsauthentication", oDeprecated }, |
5260325f | 146 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 147 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
148 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 149 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 150 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 151 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 152 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 153 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 154 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
155 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
156 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 157 | { "kerberosauthentication", oUnsupported }, |
158 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 159 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 160 | #if defined(GSSAPI) |
161 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 162 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
163 | #else | |
164 | { "gssapiauthentication", oUnsupported }, | |
165 | { "gssapidelegatecredentials", oUnsupported }, | |
166 | #endif | |
80fcb74e | 167 | { "fallbacktorsh", oDeprecated }, |
168 | { "usersh", oDeprecated }, | |
5260325f | 169 | { "identityfile", oIdentityFile }, |
fa08c86b | 170 | { "identityfile2", oIdentityFile }, /* alias */ |
3a065ed0 | 171 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 172 | { "hostname", oHostName }, |
8abcdba4 | 173 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 174 | { "proxycommand", oProxyCommand }, |
175 | { "port", oPort }, | |
176 | { "cipher", oCipher }, | |
a8be9f80 | 177 | { "ciphers", oCiphers }, |
b2552997 | 178 | { "macs", oMacs }, |
a8be9f80 | 179 | { "protocol", oProtocol }, |
5260325f | 180 | { "remoteforward", oRemoteForward }, |
181 | { "localforward", oLocalForward }, | |
182 | { "user", oUser }, | |
183 | { "host", oHost }, | |
184 | { "escapechar", oEscapeChar }, | |
5260325f | 185 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
f49bc4f7 | 186 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ |
a306f2dd | 187 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
f49bc4f7 | 188 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 189 | { "connectionattempts", oConnectionAttempts }, |
190 | { "batchmode", oBatchMode }, | |
191 | { "checkhostip", oCheckHostIP }, | |
192 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
193 | { "compression", oCompression }, | |
194 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 195 | { "tcpkeepalive", oTCPKeepAlive }, |
196 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 197 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 198 | { "loglevel", oLogLevel }, |
0490e609 | 199 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 200 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 201 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 202 | { "bindaddress", oBindAddress }, |
a2144546 | 203 | #ifdef SMARTCARD |
eea098a3 | 204 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 205 | #else |
206 | { "smartcarddevice", oUnsupported }, | |
207 | #endif | |
184eed6a | 208 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 209 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 210 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 211 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 212 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 213 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 214 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 215 | { "serveraliveinterval", oServerAliveInterval }, |
216 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 217 | { "sendenv", oSendEnv }, |
5e96b616 | 218 | { "controlpath", oControlPath }, |
219 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 220 | { "hashknownhosts", oHashKnownHosts }, |
d20f3c9e | 221 | { "tunnel", oTunnel }, |
222 | { "tunneldevice", oTunnelDevice }, | |
223 | { "localcommand", oLocalCommand }, | |
224 | { "permitlocalcommand", oPermitLocalCommand }, | |
17a3011c | 225 | { NULL, oBadOption } |
6a17f9c2 | 226 | }; |
227 | ||
aa3378df | 228 | /* |
229 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
230 | * error. | |
231 | */ | |
8efc0c15 | 232 | |
6ae2364d | 233 | void |
3867aa0a | 234 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 235 | { |
5260325f | 236 | Forward *fwd; |
e6f15ed1 | 237 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 238 | extern uid_t original_real_uid; |
3867aa0a | 239 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 240 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 241 | #endif |
5260325f | 242 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
243 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
244 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 245 | |
246 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
247 | NULL : xstrdup(newfwd->listen_host); | |
248 | fwd->listen_port = newfwd->listen_port; | |
249 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
250 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 251 | } |
252 | ||
aa3378df | 253 | /* |
254 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
255 | * an error. | |
256 | */ | |
8efc0c15 | 257 | |
6ae2364d | 258 | void |
3867aa0a | 259 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 260 | { |
5260325f | 261 | Forward *fwd; |
262 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
263 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 264 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 265 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
3867aa0a | 266 | |
267 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
268 | NULL : xstrdup(newfwd->listen_host); | |
269 | fwd->listen_port = newfwd->listen_port; | |
270 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
271 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 272 | } |
273 | ||
e1c5bfaf | 274 | static void |
275 | clear_forwardings(Options *options) | |
276 | { | |
277 | int i; | |
278 | ||
3867aa0a | 279 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 280 | if (options->local_forwards[i].listen_host != NULL) |
281 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 282 | xfree(options->local_forwards[i].connect_host); |
283 | } | |
e1c5bfaf | 284 | options->num_local_forwards = 0; |
3867aa0a | 285 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 286 | if (options->remote_forwards[i].listen_host != NULL) |
287 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 288 | xfree(options->remote_forwards[i].connect_host); |
289 | } | |
e1c5bfaf | 290 | options->num_remote_forwards = 0; |
a4f24bf8 | 291 | options->tun_open = SSH_TUNMODE_NO; |
e1c5bfaf | 292 | } |
293 | ||
aa3378df | 294 | /* |
6be9a5e8 | 295 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 296 | */ |
8efc0c15 | 297 | |
6ae2364d | 298 | static OpCodes |
5260325f | 299 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 300 | { |
1e3b8b07 | 301 | u_int i; |
8efc0c15 | 302 | |
5260325f | 303 | for (i = 0; keywords[i].name; i++) |
aa3378df | 304 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 305 | return keywords[i].opcode; |
8efc0c15 | 306 | |
b7c70970 | 307 | error("%s: line %d: Bad configuration option: %s", |
308 | filename, linenum, cp); | |
5260325f | 309 | return oBadOption; |
8efc0c15 | 310 | } |
311 | ||
aa3378df | 312 | /* |
313 | * Processes a single option line as used in the configuration files. This | |
314 | * only sets those values that have not already been set. | |
315 | */ | |
d718e75d | 316 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 317 | |
e7c0f9d5 | 318 | int |
319 | process_config_line(Options *options, const char *host, | |
5260325f | 320 | char *line, const char *filename, int linenum, |
321 | int *activep) | |
8efc0c15 | 322 | { |
3867aa0a | 323 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
129d5252 | 324 | int opcode, *intptr, value, value2, scale; |
325 | long long orig, val64; | |
d718e75d | 326 | size_t len; |
3867aa0a | 327 | Forward fwd; |
5260325f | 328 | |
204fde99 | 329 | /* Strip trailing whitespace */ |
f8cc7664 | 330 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 331 | if (strchr(WHITESPACE, line[len]) == NULL) |
332 | break; | |
333 | line[len] = '\0'; | |
334 | } | |
335 | ||
704b1659 | 336 | s = line; |
337 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
88299971 | 338 | if ((keyword = strdelim(&s)) == NULL) |
339 | return 0; | |
704b1659 | 340 | /* Ignore leading whitespace. */ |
341 | if (*keyword == '\0') | |
342 | keyword = strdelim(&s); | |
42f11eb2 | 343 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 344 | return 0; |
345 | ||
089fbbd2 | 346 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 347 | |
348 | switch (opcode) { | |
349 | case oBadOption: | |
aa3378df | 350 | /* don't panic, but count bad options */ |
351 | return -1; | |
5260325f | 352 | /* NOTREACHED */ |
09ab3296 | 353 | case oConnectTimeout: |
354 | intptr = &options->connection_timeout; | |
5d8d32a3 | 355 | parse_time: |
09ab3296 | 356 | arg = strdelim(&s); |
357 | if (!arg || *arg == '\0') | |
358 | fatal("%s line %d: missing time value.", | |
359 | filename, linenum); | |
360 | if ((value = convtime(arg)) == -1) | |
361 | fatal("%s line %d: invalid time value.", | |
362 | filename, linenum); | |
363 | if (*intptr == -1) | |
364 | *intptr = value; | |
365 | break; | |
366 | ||
5260325f | 367 | case oForwardAgent: |
368 | intptr = &options->forward_agent; | |
369 | parse_flag: | |
704b1659 | 370 | arg = strdelim(&s); |
089fbbd2 | 371 | if (!arg || *arg == '\0') |
5260325f | 372 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
373 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 374 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 375 | value = 1; |
089fbbd2 | 376 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 377 | value = 0; |
378 | else | |
379 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
380 | if (*activep && *intptr == -1) | |
381 | *intptr = value; | |
382 | break; | |
383 | ||
384 | case oForwardX11: | |
385 | intptr = &options->forward_x11; | |
386 | goto parse_flag; | |
387 | ||
d73a67d7 | 388 | case oForwardX11Trusted: |
389 | intptr = &options->forward_x11_trusted; | |
390 | goto parse_flag; | |
391 | ||
5260325f | 392 | case oGatewayPorts: |
393 | intptr = &options->gateway_ports; | |
394 | goto parse_flag; | |
395 | ||
42ea6f5e | 396 | case oExitOnForwardFailure: |
397 | intptr = &options->exit_on_forward_failure; | |
398 | goto parse_flag; | |
399 | ||
5260325f | 400 | case oUsePrivilegedPort: |
401 | intptr = &options->use_privileged_port; | |
402 | goto parse_flag; | |
403 | ||
5260325f | 404 | case oPasswordAuthentication: |
405 | intptr = &options->password_authentication; | |
406 | goto parse_flag; | |
407 | ||
94ec8c6b | 408 | case oKbdInteractiveAuthentication: |
409 | intptr = &options->kbd_interactive_authentication; | |
410 | goto parse_flag; | |
411 | ||
412 | case oKbdInteractiveDevices: | |
413 | charptr = &options->kbd_interactive_devices; | |
414 | goto parse_string; | |
415 | ||
fa08c86b | 416 | case oPubkeyAuthentication: |
417 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 418 | goto parse_flag; |
419 | ||
5260325f | 420 | case oRSAAuthentication: |
421 | intptr = &options->rsa_authentication; | |
422 | goto parse_flag; | |
423 | ||
424 | case oRhostsRSAAuthentication: | |
425 | intptr = &options->rhosts_rsa_authentication; | |
426 | goto parse_flag; | |
427 | ||
8002af61 | 428 | case oHostbasedAuthentication: |
429 | intptr = &options->hostbased_authentication; | |
430 | goto parse_flag; | |
431 | ||
d464095c | 432 | case oChallengeResponseAuthentication: |
5ba55ada | 433 | intptr = &options->challenge_response_authentication; |
5260325f | 434 | goto parse_flag; |
d0ec7f42 | 435 | |
7364bd04 | 436 | case oGssAuthentication: |
437 | intptr = &options->gss_authentication; | |
438 | goto parse_flag; | |
439 | ||
440 | case oGssDelegateCreds: | |
441 | intptr = &options->gss_deleg_creds; | |
442 | goto parse_flag; | |
443 | ||
5260325f | 444 | case oBatchMode: |
445 | intptr = &options->batch_mode; | |
446 | goto parse_flag; | |
447 | ||
448 | case oCheckHostIP: | |
449 | intptr = &options->check_host_ip; | |
450 | goto parse_flag; | |
451 | ||
21289cd0 | 452 | case oVerifyHostKeyDNS: |
453 | intptr = &options->verify_host_key_dns; | |
0161a13d | 454 | goto parse_yesnoask; |
21289cd0 | 455 | |
5260325f | 456 | case oStrictHostKeyChecking: |
457 | intptr = &options->strict_host_key_checking; | |
0161a13d | 458 | parse_yesnoask: |
704b1659 | 459 | arg = strdelim(&s); |
089fbbd2 | 460 | if (!arg || *arg == '\0') |
c76c8819 | 461 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 462 | filename, linenum); |
5260325f | 463 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 464 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 465 | value = 1; |
089fbbd2 | 466 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 467 | value = 0; |
089fbbd2 | 468 | else if (strcmp(arg, "ask") == 0) |
5260325f | 469 | value = 2; |
470 | else | |
471 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
472 | if (*activep && *intptr == -1) | |
473 | *intptr = value; | |
474 | break; | |
475 | ||
476 | case oCompression: | |
477 | intptr = &options->compression; | |
478 | goto parse_flag; | |
479 | ||
fd573618 | 480 | case oTCPKeepAlive: |
481 | intptr = &options->tcp_keep_alive; | |
5260325f | 482 | goto parse_flag; |
483 | ||
8bbc048a | 484 | case oNoHostAuthenticationForLocalhost: |
485 | intptr = &options->no_host_authentication_for_localhost; | |
486 | goto parse_flag; | |
487 | ||
5260325f | 488 | case oNumberOfPasswordPrompts: |
489 | intptr = &options->number_of_password_prompts; | |
490 | goto parse_int; | |
491 | ||
492 | case oCompressionLevel: | |
493 | intptr = &options->compression_level; | |
494 | goto parse_int; | |
495 | ||
ffd7b36b | 496 | case oRekeyLimit: |
497 | intptr = &options->rekey_limit; | |
498 | arg = strdelim(&s); | |
499 | if (!arg || *arg == '\0') | |
500 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
501 | if (arg[0] < '0' || arg[0] > '9') | |
502 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
129d5252 | 503 | orig = val64 = strtoll(arg, &endofnumber, 10); |
ffd7b36b | 504 | if (arg == endofnumber) |
505 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
506 | switch (toupper(*endofnumber)) { | |
129d5252 | 507 | case '\0': |
508 | scale = 1; | |
509 | break; | |
ffd7b36b | 510 | case 'K': |
129d5252 | 511 | scale = 1<<10; |
ffd7b36b | 512 | break; |
513 | case 'M': | |
129d5252 | 514 | scale = 1<<20; |
ffd7b36b | 515 | break; |
516 | case 'G': | |
129d5252 | 517 | scale = 1<<30; |
ffd7b36b | 518 | break; |
129d5252 | 519 | default: |
520 | fatal("%.200s line %d: Invalid RekeyLimit suffix", | |
521 | filename, linenum); | |
ffd7b36b | 522 | } |
129d5252 | 523 | val64 *= scale; |
524 | /* detect integer wrap and too-large limits */ | |
525 | if ((val64 / scale) != orig || val64 > INT_MAX) | |
526 | fatal("%.200s line %d: RekeyLimit too large", | |
527 | filename, linenum); | |
528 | if (val64 < 16) | |
529 | fatal("%.200s line %d: RekeyLimit too small", | |
530 | filename, linenum); | |
ffd7b36b | 531 | if (*activep && *intptr == -1) |
129d5252 | 532 | *intptr = (int)val64; |
ffd7b36b | 533 | break; |
534 | ||
5260325f | 535 | case oIdentityFile: |
704b1659 | 536 | arg = strdelim(&s); |
089fbbd2 | 537 | if (!arg || *arg == '\0') |
5260325f | 538 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
539 | if (*activep) { | |
fa08c86b | 540 | intptr = &options->num_identity_files; |
a306f2dd | 541 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 542 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 543 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
fa08c86b | 544 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 545 | *charptr = xstrdup(arg); |
a306f2dd | 546 | *intptr = *intptr + 1; |
5260325f | 547 | } |
548 | break; | |
549 | ||
fa649821 | 550 | case oXAuthLocation: |
551 | charptr=&options->xauth_location; | |
552 | goto parse_string; | |
553 | ||
5260325f | 554 | case oUser: |
555 | charptr = &options->user; | |
556 | parse_string: | |
704b1659 | 557 | arg = strdelim(&s); |
089fbbd2 | 558 | if (!arg || *arg == '\0') |
5260325f | 559 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
560 | if (*activep && *charptr == NULL) | |
089fbbd2 | 561 | *charptr = xstrdup(arg); |
5260325f | 562 | break; |
563 | ||
564 | case oGlobalKnownHostsFile: | |
565 | charptr = &options->system_hostfile; | |
566 | goto parse_string; | |
567 | ||
568 | case oUserKnownHostsFile: | |
569 | charptr = &options->user_hostfile; | |
570 | goto parse_string; | |
571 | ||
a306f2dd | 572 | case oGlobalKnownHostsFile2: |
573 | charptr = &options->system_hostfile2; | |
574 | goto parse_string; | |
575 | ||
576 | case oUserKnownHostsFile2: | |
577 | charptr = &options->user_hostfile2; | |
578 | goto parse_string; | |
579 | ||
5260325f | 580 | case oHostName: |
581 | charptr = &options->hostname; | |
582 | goto parse_string; | |
583 | ||
8abcdba4 | 584 | case oHostKeyAlias: |
585 | charptr = &options->host_key_alias; | |
586 | goto parse_string; | |
587 | ||
cab80f75 | 588 | case oPreferredAuthentications: |
589 | charptr = &options->preferred_authentications; | |
590 | goto parse_string; | |
591 | ||
3435f5a6 | 592 | case oBindAddress: |
593 | charptr = &options->bind_address; | |
594 | goto parse_string; | |
595 | ||
eea098a3 | 596 | case oSmartcardDevice: |
9ff6f66f | 597 | charptr = &options->smartcard_device; |
598 | goto parse_string; | |
eea098a3 | 599 | |
5260325f | 600 | case oProxyCommand: |
d20f3c9e | 601 | charptr = &options->proxy_command; |
602 | parse_command: | |
2d9c1828 | 603 | if (s == NULL) |
604 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
d718e75d | 605 | len = strspn(s, WHITESPACE "="); |
5260325f | 606 | if (*activep && *charptr == NULL) |
d718e75d | 607 | *charptr = xstrdup(s + len); |
5260325f | 608 | return 0; |
609 | ||
610 | case oPort: | |
611 | intptr = &options->port; | |
612 | parse_int: | |
704b1659 | 613 | arg = strdelim(&s); |
089fbbd2 | 614 | if (!arg || *arg == '\0') |
5260325f | 615 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 616 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 617 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 618 | |
619 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 620 | value = strtol(arg, &endofnumber, 0); |
621 | if (arg == endofnumber) | |
aa3378df | 622 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 623 | if (*activep && *intptr == -1) |
624 | *intptr = value; | |
625 | break; | |
626 | ||
627 | case oConnectionAttempts: | |
628 | intptr = &options->connection_attempts; | |
629 | goto parse_int; | |
630 | ||
631 | case oCipher: | |
632 | intptr = &options->cipher; | |
704b1659 | 633 | arg = strdelim(&s); |
089fbbd2 | 634 | if (!arg || *arg == '\0') |
71276795 | 635 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 636 | value = cipher_number(arg); |
5260325f | 637 | if (value == -1) |
638 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 639 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 640 | if (*activep && *intptr == -1) |
641 | *intptr = value; | |
642 | break; | |
643 | ||
a8be9f80 | 644 | case oCiphers: |
704b1659 | 645 | arg = strdelim(&s); |
089fbbd2 | 646 | if (!arg || *arg == '\0') |
71276795 | 647 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 648 | if (!ciphers_valid(arg)) |
d0c832f3 | 649 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 650 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 651 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 652 | options->ciphers = xstrdup(arg); |
a8be9f80 | 653 | break; |
654 | ||
b2552997 | 655 | case oMacs: |
656 | arg = strdelim(&s); | |
657 | if (!arg || *arg == '\0') | |
658 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
659 | if (!mac_valid(arg)) | |
660 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 661 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 662 | if (*activep && options->macs == NULL) |
663 | options->macs = xstrdup(arg); | |
664 | break; | |
665 | ||
e961a8f9 | 666 | case oHostKeyAlgorithms: |
667 | arg = strdelim(&s); | |
668 | if (!arg || *arg == '\0') | |
669 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
670 | if (!key_names_valid2(arg)) | |
671 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 672 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 673 | if (*activep && options->hostkeyalgorithms == NULL) |
674 | options->hostkeyalgorithms = xstrdup(arg); | |
675 | break; | |
676 | ||
a8be9f80 | 677 | case oProtocol: |
678 | intptr = &options->protocol; | |
704b1659 | 679 | arg = strdelim(&s); |
089fbbd2 | 680 | if (!arg || *arg == '\0') |
71276795 | 681 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 682 | value = proto_spec(arg); |
a8be9f80 | 683 | if (value == SSH_PROTO_UNKNOWN) |
684 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 685 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 686 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
687 | *intptr = value; | |
688 | break; | |
689 | ||
5260325f | 690 | case oLogLevel: |
691 | intptr = (int *) &options->log_level; | |
704b1659 | 692 | arg = strdelim(&s); |
089fbbd2 | 693 | value = log_level_number(arg); |
5eaf8578 | 694 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 695 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 696 | filename, linenum, arg ? arg : "<NONE>"); |
5eaf8578 | 697 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) |
5260325f | 698 | *intptr = (LogLevel) value; |
699 | break; | |
700 | ||
5260325f | 701 | case oLocalForward: |
3a8aabf0 | 702 | case oRemoteForward: |
704b1659 | 703 | arg = strdelim(&s); |
3867aa0a | 704 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 705 | fatal("%.200s line %d: Missing port argument.", |
706 | filename, linenum); | |
3867aa0a | 707 | arg2 = strdelim(&s); |
708 | if (arg2 == NULL || *arg2 == '\0') | |
709 | fatal("%.200s line %d: Missing target argument.", | |
3a8aabf0 | 710 | filename, linenum); |
3867aa0a | 711 | |
712 | /* construct a string for parse_forward */ | |
713 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
714 | ||
715 | if (parse_forward(&fwd, fwdarg) == 0) | |
3a8aabf0 | 716 | fatal("%.200s line %d: Bad forwarding specification.", |
717 | filename, linenum); | |
3867aa0a | 718 | |
3a8aabf0 | 719 | if (*activep) { |
720 | if (opcode == oLocalForward) | |
3867aa0a | 721 | add_local_forward(options, &fwd); |
3a8aabf0 | 722 | else if (opcode == oRemoteForward) |
3867aa0a | 723 | add_remote_forward(options, &fwd); |
3a8aabf0 | 724 | } |
5260325f | 725 | break; |
726 | ||
0490e609 | 727 | case oDynamicForward: |
728 | arg = strdelim(&s); | |
729 | if (!arg || *arg == '\0') | |
730 | fatal("%.200s line %d: Missing port argument.", | |
731 | filename, linenum); | |
3867aa0a | 732 | memset(&fwd, '\0', sizeof(fwd)); |
733 | fwd.connect_host = "socks"; | |
734 | fwd.listen_host = hpdelim(&arg); | |
735 | if (fwd.listen_host == NULL || | |
736 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
737 | fatal("%.200s line %d: Bad forwarding specification.", | |
738 | filename, linenum); | |
739 | if (arg) { | |
740 | fwd.listen_port = a2port(arg); | |
741 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
742 | } else { | |
743 | fwd.listen_port = a2port(fwd.listen_host); | |
4c38e9c6 | 744 | fwd.listen_host = NULL; |
3867aa0a | 745 | } |
746 | if (fwd.listen_port == 0) | |
0490e609 | 747 | fatal("%.200s line %d: Badly formatted port number.", |
748 | filename, linenum); | |
14e4a15f | 749 | if (*activep) |
3867aa0a | 750 | add_local_forward(options, &fwd); |
8002af61 | 751 | break; |
0490e609 | 752 | |
e1c5bfaf | 753 | case oClearAllForwardings: |
754 | intptr = &options->clear_forwardings; | |
755 | goto parse_flag; | |
756 | ||
5260325f | 757 | case oHost: |
758 | *activep = 0; | |
704b1659 | 759 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 760 | if (match_pattern(host, arg)) { |
761 | debug("Applying options for %.100s", arg); | |
5260325f | 762 | *activep = 1; |
763 | break; | |
764 | } | |
704b1659 | 765 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 766 | return 0; |
767 | ||
768 | case oEscapeChar: | |
769 | intptr = &options->escape_char; | |
704b1659 | 770 | arg = strdelim(&s); |
089fbbd2 | 771 | if (!arg || *arg == '\0') |
5260325f | 772 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 773 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 774 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
775 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 776 | else if (strlen(arg) == 1) |
1e3b8b07 | 777 | value = (u_char) arg[0]; |
089fbbd2 | 778 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 779 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 780 | else { |
781 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 782 | filename, linenum); |
5260325f | 783 | /* NOTREACHED */ |
784 | value = 0; /* Avoid compiler warning. */ | |
785 | } | |
786 | if (*activep && *intptr == -1) | |
787 | *intptr = value; | |
788 | break; | |
789 | ||
f811e52a | 790 | case oAddressFamily: |
791 | arg = strdelim(&s); | |
38634ff6 | 792 | if (!arg || *arg == '\0') |
793 | fatal("%s line %d: missing address family.", | |
794 | filename, linenum); | |
1572b90f | 795 | intptr = &options->address_family; |
f811e52a | 796 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 797 | value = AF_INET; |
f811e52a | 798 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 799 | value = AF_INET6; |
f811e52a | 800 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 801 | value = AF_UNSPEC; |
f811e52a | 802 | else |
803 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 804 | if (*activep && *intptr == -1) |
805 | *intptr = value; | |
f811e52a | 806 | break; |
807 | ||
cc46e2ee | 808 | case oEnableSSHKeysign: |
809 | intptr = &options->enable_ssh_keysign; | |
810 | goto parse_flag; | |
811 | ||
3a065ed0 | 812 | case oIdentitiesOnly: |
813 | intptr = &options->identities_only; | |
814 | goto parse_flag; | |
815 | ||
5d8d32a3 | 816 | case oServerAliveInterval: |
817 | intptr = &options->server_alive_interval; | |
818 | goto parse_time; | |
819 | ||
820 | case oServerAliveCountMax: | |
821 | intptr = &options->server_alive_count_max; | |
822 | goto parse_int; | |
823 | ||
61a2c1da | 824 | case oSendEnv: |
825 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
826 | if (strchr(arg, '=') != NULL) | |
827 | fatal("%s line %d: Invalid environment name.", | |
828 | filename, linenum); | |
c8c99dd5 | 829 | if (!*activep) |
830 | continue; | |
61a2c1da | 831 | if (options->num_send_env >= MAX_SEND_ENV) |
832 | fatal("%s line %d: too many send env.", | |
833 | filename, linenum); | |
834 | options->send_env[options->num_send_env++] = | |
835 | xstrdup(arg); | |
836 | } | |
837 | break; | |
838 | ||
5e96b616 | 839 | case oControlPath: |
840 | charptr = &options->control_path; | |
841 | goto parse_string; | |
842 | ||
843 | case oControlMaster: | |
844 | intptr = &options->control_master; | |
9dfd96d6 | 845 | arg = strdelim(&s); |
846 | if (!arg || *arg == '\0') | |
847 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
848 | filename, linenum); | |
849 | value = 0; /* To avoid compiler warning... */ | |
850 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
851 | value = SSHCTL_MASTER_YES; | |
852 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
853 | value = SSHCTL_MASTER_NO; | |
854 | else if (strcmp(arg, "auto") == 0) | |
855 | value = SSHCTL_MASTER_AUTO; | |
856 | else if (strcmp(arg, "ask") == 0) | |
857 | value = SSHCTL_MASTER_ASK; | |
858 | else if (strcmp(arg, "autoask") == 0) | |
859 | value = SSHCTL_MASTER_AUTO_ASK; | |
860 | else | |
861 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
862 | filename, linenum); | |
863 | if (*activep && *intptr == -1) | |
864 | *intptr = value; | |
865 | break; | |
5e96b616 | 866 | |
5c63c2ab | 867 | case oHashKnownHosts: |
868 | intptr = &options->hash_known_hosts; | |
869 | goto parse_flag; | |
870 | ||
d20f3c9e | 871 | case oTunnel: |
872 | intptr = &options->tun_open; | |
a4f24bf8 | 873 | arg = strdelim(&s); |
874 | if (!arg || *arg == '\0') | |
875 | fatal("%s line %d: Missing yes/point-to-point/" | |
876 | "ethernet/no argument.", filename, linenum); | |
877 | value = 0; /* silence compiler */ | |
878 | if (strcasecmp(arg, "ethernet") == 0) | |
879 | value = SSH_TUNMODE_ETHERNET; | |
880 | else if (strcasecmp(arg, "point-to-point") == 0) | |
881 | value = SSH_TUNMODE_POINTOPOINT; | |
882 | else if (strcasecmp(arg, "yes") == 0) | |
883 | value = SSH_TUNMODE_DEFAULT; | |
884 | else if (strcasecmp(arg, "no") == 0) | |
885 | value = SSH_TUNMODE_NO; | |
886 | else | |
887 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
888 | "no argument: %s", filename, linenum, arg); | |
889 | if (*activep) | |
890 | *intptr = value; | |
891 | break; | |
d20f3c9e | 892 | |
893 | case oTunnelDevice: | |
894 | arg = strdelim(&s); | |
895 | if (!arg || *arg == '\0') | |
896 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
897 | value = a2tun(arg, &value2); | |
a4f24bf8 | 898 | if (value == SSH_TUNID_ERR) |
d20f3c9e | 899 | fatal("%.200s line %d: Bad tun device.", filename, linenum); |
900 | if (*activep) { | |
901 | options->tun_local = value; | |
902 | options->tun_remote = value2; | |
903 | } | |
904 | break; | |
905 | ||
906 | case oLocalCommand: | |
907 | charptr = &options->local_command; | |
908 | goto parse_command; | |
909 | ||
910 | case oPermitLocalCommand: | |
911 | intptr = &options->permit_local_command; | |
912 | goto parse_flag; | |
913 | ||
80fcb74e | 914 | case oDeprecated: |
4feae93d | 915 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 916 | filename, linenum, keyword); |
4feae93d | 917 | return 0; |
80fcb74e | 918 | |
a2144546 | 919 | case oUnsupported: |
920 | error("%s line %d: Unsupported option \"%s\"", | |
921 | filename, linenum, keyword); | |
922 | return 0; | |
923 | ||
5260325f | 924 | default: |
925 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
926 | } | |
927 | ||
928 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 929 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 930 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
4e2e5cfd | 931 | filename, linenum, arg); |
089fbbd2 | 932 | } |
5260325f | 933 | return 0; |
8efc0c15 | 934 | } |
935 | ||
936 | ||
aa3378df | 937 | /* |
938 | * Reads the config file and modifies the options accordingly. Options | |
939 | * should already be initialized before this call. This never returns if | |
93111dfa | 940 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 941 | */ |
8efc0c15 | 942 | |
93111dfa | 943 | int |
f2107e97 | 944 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 945 | int checkperm) |
8efc0c15 | 946 | { |
5260325f | 947 | FILE *f; |
948 | char line[1024]; | |
949 | int active, linenum; | |
950 | int bad_options = 0; | |
951 | ||
952 | /* Open the file. */ | |
9f6cab4b | 953 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 954 | return 0; |
5260325f | 955 | |
9f6cab4b | 956 | if (checkperm) { |
957 | struct stat sb; | |
f2107e97 | 958 | |
f9ee425b | 959 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 960 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 961 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 962 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 963 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 964 | } |
965 | ||
5260325f | 966 | debug("Reading configuration data %.200s", filename); |
967 | ||
aa3378df | 968 | /* |
969 | * Mark that we are now processing the options. This flag is turned | |
970 | * on/off by Host specifications. | |
971 | */ | |
5260325f | 972 | active = 1; |
973 | linenum = 0; | |
974 | while (fgets(line, sizeof(line), f)) { | |
975 | /* Update line number counter. */ | |
976 | linenum++; | |
977 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
978 | bad_options++; | |
979 | } | |
980 | fclose(f); | |
981 | if (bad_options > 0) | |
54b974dc | 982 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 983 | filename, bad_options); |
93111dfa | 984 | return 1; |
8efc0c15 | 985 | } |
986 | ||
aa3378df | 987 | /* |
988 | * Initializes options to special values that indicate that they have not yet | |
989 | * been set. Read_config_file will only set options with this value. Options | |
990 | * are processed in the following order: command line, user config file, | |
991 | * system config file. Last, fill_default_options is called. | |
992 | */ | |
8efc0c15 | 993 | |
6ae2364d | 994 | void |
5260325f | 995 | initialize_options(Options * options) |
8efc0c15 | 996 | { |
5260325f | 997 | memset(options, 'X', sizeof(*options)); |
998 | options->forward_agent = -1; | |
999 | options->forward_x11 = -1; | |
d73a67d7 | 1000 | options->forward_x11_trusted = -1; |
42ea6f5e | 1001 | options->exit_on_forward_failure = -1; |
fa649821 | 1002 | options->xauth_location = NULL; |
5260325f | 1003 | options->gateway_ports = -1; |
1004 | options->use_privileged_port = -1; | |
5260325f | 1005 | options->rsa_authentication = -1; |
fa08c86b | 1006 | options->pubkey_authentication = -1; |
5ba55ada | 1007 | options->challenge_response_authentication = -1; |
7364bd04 | 1008 | options->gss_authentication = -1; |
1009 | options->gss_deleg_creds = -1; | |
5260325f | 1010 | options->password_authentication = -1; |
94ec8c6b | 1011 | options->kbd_interactive_authentication = -1; |
1012 | options->kbd_interactive_devices = NULL; | |
5260325f | 1013 | options->rhosts_rsa_authentication = -1; |
8002af61 | 1014 | options->hostbased_authentication = -1; |
5260325f | 1015 | options->batch_mode = -1; |
1016 | options->check_host_ip = -1; | |
1017 | options->strict_host_key_checking = -1; | |
1018 | options->compression = -1; | |
fd573618 | 1019 | options->tcp_keep_alive = -1; |
5260325f | 1020 | options->compression_level = -1; |
1021 | options->port = -1; | |
1572b90f | 1022 | options->address_family = -1; |
5260325f | 1023 | options->connection_attempts = -1; |
09ab3296 | 1024 | options->connection_timeout = -1; |
5260325f | 1025 | options->number_of_password_prompts = -1; |
1026 | options->cipher = -1; | |
a8be9f80 | 1027 | options->ciphers = NULL; |
b2552997 | 1028 | options->macs = NULL; |
e961a8f9 | 1029 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 1030 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 1031 | options->num_identity_files = 0; |
1032 | options->hostname = NULL; | |
8abcdba4 | 1033 | options->host_key_alias = NULL; |
5260325f | 1034 | options->proxy_command = NULL; |
1035 | options->user = NULL; | |
1036 | options->escape_char = -1; | |
1037 | options->system_hostfile = NULL; | |
1038 | options->user_hostfile = NULL; | |
a306f2dd | 1039 | options->system_hostfile2 = NULL; |
1040 | options->user_hostfile2 = NULL; | |
5260325f | 1041 | options->num_local_forwards = 0; |
1042 | options->num_remote_forwards = 0; | |
e1c5bfaf | 1043 | options->clear_forwardings = -1; |
5eaf8578 | 1044 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 1045 | options->preferred_authentications = NULL; |
3435f5a6 | 1046 | options->bind_address = NULL; |
9ff6f66f | 1047 | options->smartcard_device = NULL; |
cc46e2ee | 1048 | options->enable_ssh_keysign = - 1; |
8bbc048a | 1049 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 1050 | options->identities_only = - 1; |
ffd7b36b | 1051 | options->rekey_limit = - 1; |
21289cd0 | 1052 | options->verify_host_key_dns = -1; |
5d8d32a3 | 1053 | options->server_alive_interval = -1; |
1054 | options->server_alive_count_max = -1; | |
61a2c1da | 1055 | options->num_send_env = 0; |
5e96b616 | 1056 | options->control_path = NULL; |
1057 | options->control_master = -1; | |
5c63c2ab | 1058 | options->hash_known_hosts = -1; |
d20f3c9e | 1059 | options->tun_open = -1; |
1060 | options->tun_local = -1; | |
1061 | options->tun_remote = -1; | |
1062 | options->local_command = NULL; | |
1063 | options->permit_local_command = -1; | |
8efc0c15 | 1064 | } |
1065 | ||
aa3378df | 1066 | /* |
1067 | * Called after processing other sources of option data, this fills those | |
1068 | * options for which no value has been specified with their default values. | |
1069 | */ | |
8efc0c15 | 1070 | |
6ae2364d | 1071 | void |
5260325f | 1072 | fill_default_options(Options * options) |
8efc0c15 | 1073 | { |
d2c46e77 | 1074 | int len; |
1075 | ||
5260325f | 1076 | if (options->forward_agent == -1) |
71276795 | 1077 | options->forward_agent = 0; |
5260325f | 1078 | if (options->forward_x11 == -1) |
c8d54615 | 1079 | options->forward_x11 = 0; |
d73a67d7 | 1080 | if (options->forward_x11_trusted == -1) |
1081 | options->forward_x11_trusted = 0; | |
42ea6f5e | 1082 | if (options->exit_on_forward_failure == -1) |
1083 | options->exit_on_forward_failure = 0; | |
fa649821 | 1084 | if (options->xauth_location == NULL) |
fd9ede94 | 1085 | options->xauth_location = _PATH_XAUTH; |
5260325f | 1086 | if (options->gateway_ports == -1) |
1087 | options->gateway_ports = 0; | |
1088 | if (options->use_privileged_port == -1) | |
d5ebca2b | 1089 | options->use_privileged_port = 0; |
5260325f | 1090 | if (options->rsa_authentication == -1) |
1091 | options->rsa_authentication = 1; | |
fa08c86b | 1092 | if (options->pubkey_authentication == -1) |
1093 | options->pubkey_authentication = 1; | |
5ba55ada | 1094 | if (options->challenge_response_authentication == -1) |
10a2cbef | 1095 | options->challenge_response_authentication = 1; |
7364bd04 | 1096 | if (options->gss_authentication == -1) |
2ecb78df | 1097 | options->gss_authentication = 0; |
7364bd04 | 1098 | if (options->gss_deleg_creds == -1) |
1099 | options->gss_deleg_creds = 0; | |
5260325f | 1100 | if (options->password_authentication == -1) |
1101 | options->password_authentication = 1; | |
94ec8c6b | 1102 | if (options->kbd_interactive_authentication == -1) |
d464095c | 1103 | options->kbd_interactive_authentication = 1; |
5260325f | 1104 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 1105 | options->rhosts_rsa_authentication = 0; |
8002af61 | 1106 | if (options->hostbased_authentication == -1) |
1107 | options->hostbased_authentication = 0; | |
5260325f | 1108 | if (options->batch_mode == -1) |
1109 | options->batch_mode = 0; | |
1110 | if (options->check_host_ip == -1) | |
1111 | options->check_host_ip = 1; | |
1112 | if (options->strict_host_key_checking == -1) | |
1113 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1114 | if (options->compression == -1) | |
1115 | options->compression = 0; | |
fd573618 | 1116 | if (options->tcp_keep_alive == -1) |
1117 | options->tcp_keep_alive = 1; | |
5260325f | 1118 | if (options->compression_level == -1) |
1119 | options->compression_level = 6; | |
1120 | if (options->port == -1) | |
1121 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1122 | if (options->address_family == -1) |
1123 | options->address_family = AF_UNSPEC; | |
5260325f | 1124 | if (options->connection_attempts == -1) |
ce773142 | 1125 | options->connection_attempts = 1; |
5260325f | 1126 | if (options->number_of_password_prompts == -1) |
1127 | options->number_of_password_prompts = 3; | |
1128 | /* Selected in ssh_login(). */ | |
1129 | if (options->cipher == -1) | |
1130 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1131 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1132 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1133 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1134 | if (options->protocol == SSH_PROTO_UNKNOWN) |
3e587cc3 | 1135 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
5260325f | 1136 | if (options->num_identity_files == 0) { |
fa08c86b | 1137 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1138 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1139 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1140 | xmalloc(len); |
1141 | snprintf(options->identity_files[options->num_identity_files++], | |
1142 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1143 | } |
1144 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1145 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1146 | options->identity_files[options->num_identity_files] = | |
1147 | xmalloc(len); | |
1148 | snprintf(options->identity_files[options->num_identity_files++], | |
1149 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1150 | ||
d2c46e77 | 1151 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1152 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1153 | xmalloc(len); |
1154 | snprintf(options->identity_files[options->num_identity_files++], | |
1155 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1156 | } |
a306f2dd | 1157 | } |
5260325f | 1158 | if (options->escape_char == -1) |
1159 | options->escape_char = '~'; | |
1160 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1161 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1162 | if (options->user_hostfile == NULL) |
42f11eb2 | 1163 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1164 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1165 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1166 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1167 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1168 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1169 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1170 | if (options->clear_forwardings == 1) |
1171 | clear_forwardings(options); | |
8bbc048a | 1172 | if (options->no_host_authentication_for_localhost == - 1) |
1173 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1174 | if (options->identities_only == -1) |
1175 | options->identities_only = 0; | |
cc46e2ee | 1176 | if (options->enable_ssh_keysign == -1) |
1177 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1178 | if (options->rekey_limit == -1) |
1179 | options->rekey_limit = 0; | |
21289cd0 | 1180 | if (options->verify_host_key_dns == -1) |
1181 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1182 | if (options->server_alive_interval == -1) |
1183 | options->server_alive_interval = 0; | |
1184 | if (options->server_alive_count_max == -1) | |
1185 | options->server_alive_count_max = 3; | |
5e96b616 | 1186 | if (options->control_master == -1) |
1187 | options->control_master = 0; | |
5c63c2ab | 1188 | if (options->hash_known_hosts == -1) |
1189 | options->hash_known_hosts = 0; | |
d20f3c9e | 1190 | if (options->tun_open == -1) |
a4f24bf8 | 1191 | options->tun_open = SSH_TUNMODE_NO; |
1192 | if (options->tun_local == -1) | |
1193 | options->tun_local = SSH_TUNID_ANY; | |
1194 | if (options->tun_remote == -1) | |
1195 | options->tun_remote = SSH_TUNID_ANY; | |
d20f3c9e | 1196 | if (options->permit_local_command == -1) |
1197 | options->permit_local_command = 0; | |
1198 | /* options->local_command should not be set by default */ | |
5260325f | 1199 | /* options->proxy_command should not be set by default */ |
1200 | /* options->user will be set in the main program if appropriate */ | |
1201 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1202 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1203 | /* options->preferred_authentications will be set in ssh */ |
8efc0c15 | 1204 | } |
3867aa0a | 1205 | |
1206 | /* | |
1207 | * parse_forward | |
1208 | * parses a string containing a port forwarding specification of the form: | |
1209 | * [listenhost:]listenport:connecthost:connectport | |
1210 | * returns number of arguments parsed or zero on error | |
1211 | */ | |
1212 | int | |
1213 | parse_forward(Forward *fwd, const char *fwdspec) | |
1214 | { | |
1215 | int i; | |
1216 | char *p, *cp, *fwdarg[4]; | |
1217 | ||
1218 | memset(fwd, '\0', sizeof(*fwd)); | |
1219 | ||
1220 | cp = p = xstrdup(fwdspec); | |
1221 | ||
1222 | /* skip leading spaces */ | |
1223 | while (*cp && isspace(*cp)) | |
1224 | cp++; | |
1225 | ||
1226 | for (i = 0; i < 4; ++i) | |
1227 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1228 | break; | |
1229 | ||
1230 | /* Check for trailing garbage in 4-arg case*/ | |
1231 | if (cp != NULL) | |
1232 | i = 0; /* failure */ | |
1233 | ||
1234 | switch (i) { | |
1235 | case 3: | |
1236 | fwd->listen_host = NULL; | |
1237 | fwd->listen_port = a2port(fwdarg[0]); | |
1238 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1239 | fwd->connect_port = a2port(fwdarg[2]); | |
1240 | break; | |
1241 | ||
1242 | case 4: | |
1243 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1244 | fwd->listen_port = a2port(fwdarg[1]); | |
1245 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1246 | fwd->connect_port = a2port(fwdarg[3]); | |
1247 | break; | |
1248 | default: | |
1249 | i = 0; /* failure */ | |
1250 | } | |
1251 | ||
1252 | xfree(p); | |
1253 | ||
1254 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1255 | goto fail_free; | |
1256 | ||
1257 | if (fwd->connect_host != NULL && | |
1258 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1259 | goto fail_free; | |
1260 | ||
1261 | return (i); | |
1262 | ||
1263 | fail_free: | |
1264 | if (fwd->connect_host != NULL) | |
1265 | xfree(fwd->connect_host); | |
1266 | if (fwd->listen_host != NULL) | |
1267 | xfree(fwd->listen_host); | |
1268 | return (0); | |
1269 | } |