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30573fea | 1 | /* $OpenBSD: readconf.c,v 1.168 2008/11/01 17:40:33 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> |
31652869 | 26 | #include <signal.h> |
24436b92 | 27 | #include <stdarg.h> |
cf851879 | 28 | #include <stdio.h> |
00146caa | 29 | #include <string.h> |
5188ba17 | 30 | #include <unistd.h> |
b6438382 | 31 | |
8efc0c15 | 32 | #include "xmalloc.h" |
31652869 | 33 | #include "ssh.h" |
a8be9f80 | 34 | #include "compat.h" |
42f11eb2 | 35 | #include "cipher.h" |
36 | #include "pathnames.h" | |
37 | #include "log.h" | |
31652869 | 38 | #include "key.h" |
42f11eb2 | 39 | #include "readconf.h" |
40 | #include "match.h" | |
41 | #include "misc.h" | |
31652869 | 42 | #include "buffer.h" |
b2552997 | 43 | #include "kex.h" |
44 | #include "mac.h" | |
8efc0c15 | 45 | |
46 | /* Format of the configuration file: | |
47 | ||
48 | # Configuration data is parsed as follows: | |
49 | # 1. command line options | |
50 | # 2. user-specific file | |
51 | # 3. system-wide file | |
52 | # Any configuration value is only changed the first time it is set. | |
53 | # Thus, host-specific definitions should be at the beginning of the | |
54 | # configuration file, and defaults at the end. | |
55 | ||
56 | # Host-specific declarations. These may override anything above. A single | |
57 | # host may match multiple declarations; these are processed in the order | |
58 | # that they are given in. | |
59 | ||
60 | Host *.ngs.fi ngs.fi | |
80fcb74e | 61 | User foo |
8efc0c15 | 62 | |
63 | Host fake.com | |
64 | HostName another.host.name.real.org | |
65 | User blaah | |
66 | Port 34289 | |
67 | ForwardX11 no | |
68 | ForwardAgent no | |
69 | ||
70 | Host books.com | |
71 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
72 | Cipher 3des | |
73 | ||
74 | Host fascist.blob.com | |
75 | Port 23123 | |
76 | User tylonen | |
8efc0c15 | 77 | PasswordAuthentication no |
78 | ||
79 | Host puukko.hut.fi | |
80 | User t35124p | |
81 | ProxyCommand ssh-proxy %h %p | |
82 | ||
83 | Host *.fr | |
80fcb74e | 84 | PublicKeyAuthentication no |
8efc0c15 | 85 | |
86 | Host *.su | |
87 | Cipher none | |
88 | PasswordAuthentication no | |
89 | ||
d20f3c9e | 90 | Host vpn.fake.com |
91 | Tunnel yes | |
92 | TunnelDevice 3 | |
93 | ||
8efc0c15 | 94 | # Defaults for various options |
95 | Host * | |
96 | ForwardAgent no | |
fa08c86b | 97 | ForwardX11 no |
8efc0c15 | 98 | PasswordAuthentication yes |
99 | RSAAuthentication yes | |
100 | RhostsRSAAuthentication yes | |
8efc0c15 | 101 | StrictHostKeyChecking yes |
fd573618 | 102 | TcpKeepAlive no |
8efc0c15 | 103 | IdentityFile ~/.ssh/identity |
104 | Port 22 | |
105 | EscapeChar ~ | |
106 | ||
107 | */ | |
108 | ||
109 | /* Keyword tokens. */ | |
110 | ||
5260325f | 111 | typedef enum { |
112 | oBadOption, | |
d73a67d7 | 113 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
42ea6f5e | 114 | oExitOnForwardFailure, |
7203d6bb | 115 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 116 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 117 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
118 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
119 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
120 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 121 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 122 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 123 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 124 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 125 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 126 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 127 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 128 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 129 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 130 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 131 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
d20f3c9e | 132 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
7b3999b8 | 133 | oVisualHostKey, |
a2144546 | 134 | oDeprecated, oUnsupported |
8efc0c15 | 135 | } OpCodes; |
136 | ||
137 | /* Textual representations of the tokens. */ | |
138 | ||
5260325f | 139 | static struct { |
140 | const char *name; | |
141 | OpCodes opcode; | |
142 | } keywords[] = { | |
143 | { "forwardagent", oForwardAgent }, | |
144 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 145 | { "forwardx11trusted", oForwardX11Trusted }, |
42ea6f5e | 146 | { "exitonforwardfailure", oExitOnForwardFailure }, |
fa649821 | 147 | { "xauthlocation", oXAuthLocation }, |
5260325f | 148 | { "gatewayports", oGatewayPorts }, |
149 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 150 | { "rhostsauthentication", oDeprecated }, |
5260325f | 151 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 152 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
153 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 154 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 155 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 156 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 157 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 158 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 159 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
160 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
161 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 162 | { "kerberosauthentication", oUnsupported }, |
163 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 164 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 165 | #if defined(GSSAPI) |
166 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 167 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
168 | #else | |
169 | { "gssapiauthentication", oUnsupported }, | |
170 | { "gssapidelegatecredentials", oUnsupported }, | |
171 | #endif | |
80fcb74e | 172 | { "fallbacktorsh", oDeprecated }, |
173 | { "usersh", oDeprecated }, | |
5260325f | 174 | { "identityfile", oIdentityFile }, |
fa08c86b | 175 | { "identityfile2", oIdentityFile }, /* alias */ |
3a065ed0 | 176 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 177 | { "hostname", oHostName }, |
8abcdba4 | 178 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 179 | { "proxycommand", oProxyCommand }, |
180 | { "port", oPort }, | |
181 | { "cipher", oCipher }, | |
a8be9f80 | 182 | { "ciphers", oCiphers }, |
b2552997 | 183 | { "macs", oMacs }, |
a8be9f80 | 184 | { "protocol", oProtocol }, |
5260325f | 185 | { "remoteforward", oRemoteForward }, |
186 | { "localforward", oLocalForward }, | |
187 | { "user", oUser }, | |
188 | { "host", oHost }, | |
189 | { "escapechar", oEscapeChar }, | |
5260325f | 190 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
f49bc4f7 | 191 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ |
a306f2dd | 192 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
f49bc4f7 | 193 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 194 | { "connectionattempts", oConnectionAttempts }, |
195 | { "batchmode", oBatchMode }, | |
196 | { "checkhostip", oCheckHostIP }, | |
197 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
198 | { "compression", oCompression }, | |
199 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 200 | { "tcpkeepalive", oTCPKeepAlive }, |
201 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 202 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 203 | { "loglevel", oLogLevel }, |
0490e609 | 204 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 205 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 206 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 207 | { "bindaddress", oBindAddress }, |
a2144546 | 208 | #ifdef SMARTCARD |
eea098a3 | 209 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 210 | #else |
211 | { "smartcarddevice", oUnsupported }, | |
212 | #endif | |
184eed6a | 213 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 214 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 215 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 216 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 217 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 218 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 219 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 220 | { "serveraliveinterval", oServerAliveInterval }, |
221 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 222 | { "sendenv", oSendEnv }, |
5e96b616 | 223 | { "controlpath", oControlPath }, |
224 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 225 | { "hashknownhosts", oHashKnownHosts }, |
d20f3c9e | 226 | { "tunnel", oTunnel }, |
227 | { "tunneldevice", oTunnelDevice }, | |
228 | { "localcommand", oLocalCommand }, | |
229 | { "permitlocalcommand", oPermitLocalCommand }, | |
7b3999b8 | 230 | { "visualhostkey", oVisualHostKey }, |
17a3011c | 231 | { NULL, oBadOption } |
6a17f9c2 | 232 | }; |
233 | ||
aa3378df | 234 | /* |
235 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
236 | * error. | |
237 | */ | |
8efc0c15 | 238 | |
6ae2364d | 239 | void |
3867aa0a | 240 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 241 | { |
5260325f | 242 | Forward *fwd; |
e6f15ed1 | 243 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 244 | extern uid_t original_real_uid; |
3867aa0a | 245 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 246 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 247 | #endif |
5260325f | 248 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
249 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
250 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 251 | |
252 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
253 | NULL : xstrdup(newfwd->listen_host); | |
254 | fwd->listen_port = newfwd->listen_port; | |
255 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
256 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 257 | } |
258 | ||
aa3378df | 259 | /* |
260 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
261 | * an error. | |
262 | */ | |
8efc0c15 | 263 | |
6ae2364d | 264 | void |
3867aa0a | 265 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 266 | { |
5260325f | 267 | Forward *fwd; |
268 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
269 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 270 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 271 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
3867aa0a | 272 | |
273 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
274 | NULL : xstrdup(newfwd->listen_host); | |
275 | fwd->listen_port = newfwd->listen_port; | |
276 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
277 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 278 | } |
279 | ||
e1c5bfaf | 280 | static void |
281 | clear_forwardings(Options *options) | |
282 | { | |
283 | int i; | |
284 | ||
3867aa0a | 285 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 286 | if (options->local_forwards[i].listen_host != NULL) |
287 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 288 | xfree(options->local_forwards[i].connect_host); |
289 | } | |
e1c5bfaf | 290 | options->num_local_forwards = 0; |
3867aa0a | 291 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 292 | if (options->remote_forwards[i].listen_host != NULL) |
293 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 294 | xfree(options->remote_forwards[i].connect_host); |
295 | } | |
e1c5bfaf | 296 | options->num_remote_forwards = 0; |
a4f24bf8 | 297 | options->tun_open = SSH_TUNMODE_NO; |
e1c5bfaf | 298 | } |
299 | ||
aa3378df | 300 | /* |
6be9a5e8 | 301 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 302 | */ |
8efc0c15 | 303 | |
6ae2364d | 304 | static OpCodes |
5260325f | 305 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 306 | { |
1e3b8b07 | 307 | u_int i; |
8efc0c15 | 308 | |
5260325f | 309 | for (i = 0; keywords[i].name; i++) |
aa3378df | 310 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 311 | return keywords[i].opcode; |
8efc0c15 | 312 | |
b7c70970 | 313 | error("%s: line %d: Bad configuration option: %s", |
314 | filename, linenum, cp); | |
5260325f | 315 | return oBadOption; |
8efc0c15 | 316 | } |
317 | ||
aa3378df | 318 | /* |
319 | * Processes a single option line as used in the configuration files. This | |
320 | * only sets those values that have not already been set. | |
321 | */ | |
d718e75d | 322 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 323 | |
e7c0f9d5 | 324 | int |
325 | process_config_line(Options *options, const char *host, | |
5260325f | 326 | char *line, const char *filename, int linenum, |
327 | int *activep) | |
8efc0c15 | 328 | { |
3867aa0a | 329 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
129d5252 | 330 | int opcode, *intptr, value, value2, scale; |
2a72bc03 | 331 | LogLevel *log_level_ptr; |
129d5252 | 332 | long long orig, val64; |
d718e75d | 333 | size_t len; |
3867aa0a | 334 | Forward fwd; |
5260325f | 335 | |
204fde99 | 336 | /* Strip trailing whitespace */ |
f8cc7664 | 337 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 338 | if (strchr(WHITESPACE, line[len]) == NULL) |
339 | break; | |
340 | line[len] = '\0'; | |
341 | } | |
342 | ||
704b1659 | 343 | s = line; |
344 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
88299971 | 345 | if ((keyword = strdelim(&s)) == NULL) |
346 | return 0; | |
704b1659 | 347 | /* Ignore leading whitespace. */ |
348 | if (*keyword == '\0') | |
349 | keyword = strdelim(&s); | |
42f11eb2 | 350 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 351 | return 0; |
352 | ||
089fbbd2 | 353 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 354 | |
355 | switch (opcode) { | |
356 | case oBadOption: | |
aa3378df | 357 | /* don't panic, but count bad options */ |
358 | return -1; | |
5260325f | 359 | /* NOTREACHED */ |
09ab3296 | 360 | case oConnectTimeout: |
361 | intptr = &options->connection_timeout; | |
5d8d32a3 | 362 | parse_time: |
09ab3296 | 363 | arg = strdelim(&s); |
364 | if (!arg || *arg == '\0') | |
365 | fatal("%s line %d: missing time value.", | |
366 | filename, linenum); | |
367 | if ((value = convtime(arg)) == -1) | |
368 | fatal("%s line %d: invalid time value.", | |
369 | filename, linenum); | |
7f650171 | 370 | if (*activep && *intptr == -1) |
09ab3296 | 371 | *intptr = value; |
372 | break; | |
373 | ||
5260325f | 374 | case oForwardAgent: |
375 | intptr = &options->forward_agent; | |
376 | parse_flag: | |
704b1659 | 377 | arg = strdelim(&s); |
089fbbd2 | 378 | if (!arg || *arg == '\0') |
5260325f | 379 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
380 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 381 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 382 | value = 1; |
089fbbd2 | 383 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 384 | value = 0; |
385 | else | |
386 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
387 | if (*activep && *intptr == -1) | |
388 | *intptr = value; | |
389 | break; | |
390 | ||
391 | case oForwardX11: | |
392 | intptr = &options->forward_x11; | |
393 | goto parse_flag; | |
394 | ||
d73a67d7 | 395 | case oForwardX11Trusted: |
396 | intptr = &options->forward_x11_trusted; | |
397 | goto parse_flag; | |
398 | ||
5260325f | 399 | case oGatewayPorts: |
400 | intptr = &options->gateway_ports; | |
401 | goto parse_flag; | |
402 | ||
42ea6f5e | 403 | case oExitOnForwardFailure: |
404 | intptr = &options->exit_on_forward_failure; | |
405 | goto parse_flag; | |
406 | ||
5260325f | 407 | case oUsePrivilegedPort: |
408 | intptr = &options->use_privileged_port; | |
409 | goto parse_flag; | |
410 | ||
5260325f | 411 | case oPasswordAuthentication: |
412 | intptr = &options->password_authentication; | |
413 | goto parse_flag; | |
414 | ||
94ec8c6b | 415 | case oKbdInteractiveAuthentication: |
416 | intptr = &options->kbd_interactive_authentication; | |
417 | goto parse_flag; | |
418 | ||
419 | case oKbdInteractiveDevices: | |
420 | charptr = &options->kbd_interactive_devices; | |
421 | goto parse_string; | |
422 | ||
fa08c86b | 423 | case oPubkeyAuthentication: |
424 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 425 | goto parse_flag; |
426 | ||
5260325f | 427 | case oRSAAuthentication: |
428 | intptr = &options->rsa_authentication; | |
429 | goto parse_flag; | |
430 | ||
431 | case oRhostsRSAAuthentication: | |
432 | intptr = &options->rhosts_rsa_authentication; | |
433 | goto parse_flag; | |
434 | ||
8002af61 | 435 | case oHostbasedAuthentication: |
436 | intptr = &options->hostbased_authentication; | |
437 | goto parse_flag; | |
438 | ||
d464095c | 439 | case oChallengeResponseAuthentication: |
5ba55ada | 440 | intptr = &options->challenge_response_authentication; |
5260325f | 441 | goto parse_flag; |
d0ec7f42 | 442 | |
7364bd04 | 443 | case oGssAuthentication: |
444 | intptr = &options->gss_authentication; | |
445 | goto parse_flag; | |
446 | ||
447 | case oGssDelegateCreds: | |
448 | intptr = &options->gss_deleg_creds; | |
449 | goto parse_flag; | |
450 | ||
5260325f | 451 | case oBatchMode: |
452 | intptr = &options->batch_mode; | |
453 | goto parse_flag; | |
454 | ||
455 | case oCheckHostIP: | |
456 | intptr = &options->check_host_ip; | |
7b3999b8 | 457 | goto parse_flag; |
5260325f | 458 | |
21289cd0 | 459 | case oVerifyHostKeyDNS: |
460 | intptr = &options->verify_host_key_dns; | |
0161a13d | 461 | goto parse_yesnoask; |
21289cd0 | 462 | |
5260325f | 463 | case oStrictHostKeyChecking: |
464 | intptr = &options->strict_host_key_checking; | |
0161a13d | 465 | parse_yesnoask: |
704b1659 | 466 | arg = strdelim(&s); |
089fbbd2 | 467 | if (!arg || *arg == '\0') |
c76c8819 | 468 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 469 | filename, linenum); |
5260325f | 470 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 471 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 472 | value = 1; |
089fbbd2 | 473 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 474 | value = 0; |
089fbbd2 | 475 | else if (strcmp(arg, "ask") == 0) |
5260325f | 476 | value = 2; |
477 | else | |
478 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
479 | if (*activep && *intptr == -1) | |
480 | *intptr = value; | |
481 | break; | |
482 | ||
483 | case oCompression: | |
484 | intptr = &options->compression; | |
485 | goto parse_flag; | |
486 | ||
fd573618 | 487 | case oTCPKeepAlive: |
488 | intptr = &options->tcp_keep_alive; | |
5260325f | 489 | goto parse_flag; |
490 | ||
8bbc048a | 491 | case oNoHostAuthenticationForLocalhost: |
492 | intptr = &options->no_host_authentication_for_localhost; | |
493 | goto parse_flag; | |
494 | ||
5260325f | 495 | case oNumberOfPasswordPrompts: |
496 | intptr = &options->number_of_password_prompts; | |
497 | goto parse_int; | |
498 | ||
499 | case oCompressionLevel: | |
500 | intptr = &options->compression_level; | |
501 | goto parse_int; | |
502 | ||
ffd7b36b | 503 | case oRekeyLimit: |
ffd7b36b | 504 | arg = strdelim(&s); |
505 | if (!arg || *arg == '\0') | |
506 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
507 | if (arg[0] < '0' || arg[0] > '9') | |
508 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
129d5252 | 509 | orig = val64 = strtoll(arg, &endofnumber, 10); |
ffd7b36b | 510 | if (arg == endofnumber) |
511 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
512 | switch (toupper(*endofnumber)) { | |
129d5252 | 513 | case '\0': |
514 | scale = 1; | |
515 | break; | |
ffd7b36b | 516 | case 'K': |
129d5252 | 517 | scale = 1<<10; |
ffd7b36b | 518 | break; |
519 | case 'M': | |
129d5252 | 520 | scale = 1<<20; |
ffd7b36b | 521 | break; |
522 | case 'G': | |
129d5252 | 523 | scale = 1<<30; |
ffd7b36b | 524 | break; |
129d5252 | 525 | default: |
526 | fatal("%.200s line %d: Invalid RekeyLimit suffix", | |
527 | filename, linenum); | |
ffd7b36b | 528 | } |
129d5252 | 529 | val64 *= scale; |
530 | /* detect integer wrap and too-large limits */ | |
fe771396 | 531 | if ((val64 / scale) != orig || val64 > UINT_MAX) |
129d5252 | 532 | fatal("%.200s line %d: RekeyLimit too large", |
533 | filename, linenum); | |
534 | if (val64 < 16) | |
535 | fatal("%.200s line %d: RekeyLimit too small", | |
536 | filename, linenum); | |
fe771396 | 537 | if (*activep && options->rekey_limit == -1) |
538 | options->rekey_limit = (u_int32_t)val64; | |
ffd7b36b | 539 | break; |
540 | ||
5260325f | 541 | case oIdentityFile: |
704b1659 | 542 | arg = strdelim(&s); |
089fbbd2 | 543 | if (!arg || *arg == '\0') |
5260325f | 544 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
545 | if (*activep) { | |
fa08c86b | 546 | intptr = &options->num_identity_files; |
a306f2dd | 547 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 548 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 549 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
0cf6a024 | 550 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 551 | *charptr = xstrdup(arg); |
a306f2dd | 552 | *intptr = *intptr + 1; |
5260325f | 553 | } |
554 | break; | |
555 | ||
fa649821 | 556 | case oXAuthLocation: |
557 | charptr=&options->xauth_location; | |
558 | goto parse_string; | |
559 | ||
5260325f | 560 | case oUser: |
561 | charptr = &options->user; | |
562 | parse_string: | |
704b1659 | 563 | arg = strdelim(&s); |
089fbbd2 | 564 | if (!arg || *arg == '\0') |
5260325f | 565 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
566 | if (*activep && *charptr == NULL) | |
089fbbd2 | 567 | *charptr = xstrdup(arg); |
5260325f | 568 | break; |
569 | ||
570 | case oGlobalKnownHostsFile: | |
571 | charptr = &options->system_hostfile; | |
572 | goto parse_string; | |
573 | ||
574 | case oUserKnownHostsFile: | |
575 | charptr = &options->user_hostfile; | |
576 | goto parse_string; | |
577 | ||
a306f2dd | 578 | case oGlobalKnownHostsFile2: |
579 | charptr = &options->system_hostfile2; | |
580 | goto parse_string; | |
581 | ||
582 | case oUserKnownHostsFile2: | |
583 | charptr = &options->user_hostfile2; | |
584 | goto parse_string; | |
585 | ||
5260325f | 586 | case oHostName: |
587 | charptr = &options->hostname; | |
588 | goto parse_string; | |
589 | ||
8abcdba4 | 590 | case oHostKeyAlias: |
591 | charptr = &options->host_key_alias; | |
592 | goto parse_string; | |
593 | ||
cab80f75 | 594 | case oPreferredAuthentications: |
595 | charptr = &options->preferred_authentications; | |
596 | goto parse_string; | |
597 | ||
3435f5a6 | 598 | case oBindAddress: |
599 | charptr = &options->bind_address; | |
600 | goto parse_string; | |
601 | ||
eea098a3 | 602 | case oSmartcardDevice: |
9ff6f66f | 603 | charptr = &options->smartcard_device; |
604 | goto parse_string; | |
eea098a3 | 605 | |
5260325f | 606 | case oProxyCommand: |
d20f3c9e | 607 | charptr = &options->proxy_command; |
608 | parse_command: | |
2d9c1828 | 609 | if (s == NULL) |
610 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
d718e75d | 611 | len = strspn(s, WHITESPACE "="); |
5260325f | 612 | if (*activep && *charptr == NULL) |
d718e75d | 613 | *charptr = xstrdup(s + len); |
5260325f | 614 | return 0; |
615 | ||
616 | case oPort: | |
617 | intptr = &options->port; | |
618 | parse_int: | |
704b1659 | 619 | arg = strdelim(&s); |
089fbbd2 | 620 | if (!arg || *arg == '\0') |
5260325f | 621 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 622 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 623 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 624 | |
625 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 626 | value = strtol(arg, &endofnumber, 0); |
627 | if (arg == endofnumber) | |
aa3378df | 628 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 629 | if (*activep && *intptr == -1) |
630 | *intptr = value; | |
631 | break; | |
632 | ||
633 | case oConnectionAttempts: | |
634 | intptr = &options->connection_attempts; | |
635 | goto parse_int; | |
636 | ||
637 | case oCipher: | |
638 | intptr = &options->cipher; | |
704b1659 | 639 | arg = strdelim(&s); |
089fbbd2 | 640 | if (!arg || *arg == '\0') |
71276795 | 641 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 642 | value = cipher_number(arg); |
5260325f | 643 | if (value == -1) |
644 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 645 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 646 | if (*activep && *intptr == -1) |
647 | *intptr = value; | |
648 | break; | |
649 | ||
a8be9f80 | 650 | case oCiphers: |
704b1659 | 651 | arg = strdelim(&s); |
089fbbd2 | 652 | if (!arg || *arg == '\0') |
71276795 | 653 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 654 | if (!ciphers_valid(arg)) |
d0c832f3 | 655 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 656 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 657 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 658 | options->ciphers = xstrdup(arg); |
a8be9f80 | 659 | break; |
660 | ||
b2552997 | 661 | case oMacs: |
662 | arg = strdelim(&s); | |
663 | if (!arg || *arg == '\0') | |
664 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
665 | if (!mac_valid(arg)) | |
666 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 667 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 668 | if (*activep && options->macs == NULL) |
669 | options->macs = xstrdup(arg); | |
670 | break; | |
671 | ||
e961a8f9 | 672 | case oHostKeyAlgorithms: |
673 | arg = strdelim(&s); | |
674 | if (!arg || *arg == '\0') | |
675 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
676 | if (!key_names_valid2(arg)) | |
677 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 678 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 679 | if (*activep && options->hostkeyalgorithms == NULL) |
680 | options->hostkeyalgorithms = xstrdup(arg); | |
681 | break; | |
682 | ||
a8be9f80 | 683 | case oProtocol: |
684 | intptr = &options->protocol; | |
704b1659 | 685 | arg = strdelim(&s); |
089fbbd2 | 686 | if (!arg || *arg == '\0') |
71276795 | 687 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 688 | value = proto_spec(arg); |
a8be9f80 | 689 | if (value == SSH_PROTO_UNKNOWN) |
690 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 691 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 692 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
693 | *intptr = value; | |
694 | break; | |
695 | ||
5260325f | 696 | case oLogLevel: |
2a72bc03 | 697 | log_level_ptr = &options->log_level; |
704b1659 | 698 | arg = strdelim(&s); |
089fbbd2 | 699 | value = log_level_number(arg); |
5eaf8578 | 700 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 701 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 702 | filename, linenum, arg ? arg : "<NONE>"); |
2a72bc03 | 703 | if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET) |
704 | *log_level_ptr = (LogLevel) value; | |
5260325f | 705 | break; |
706 | ||
5260325f | 707 | case oLocalForward: |
3a8aabf0 | 708 | case oRemoteForward: |
30573fea | 709 | case oDynamicForward: |
704b1659 | 710 | arg = strdelim(&s); |
3867aa0a | 711 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 712 | fatal("%.200s line %d: Missing port argument.", |
713 | filename, linenum); | |
3867aa0a | 714 | |
30573fea | 715 | if (opcode == oLocalForward || |
716 | opcode == oRemoteForward) { | |
717 | arg2 = strdelim(&s); | |
718 | if (arg2 == NULL || *arg2 == '\0') | |
719 | fatal("%.200s line %d: Missing target argument.", | |
720 | filename, linenum); | |
3867aa0a | 721 | |
30573fea | 722 | /* construct a string for parse_forward */ |
723 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
724 | } else if (opcode == oDynamicForward) { | |
725 | strlcpy(fwdarg, arg, sizeof(fwdarg)); | |
726 | } | |
727 | ||
728 | if (parse_forward(&fwd, fwdarg, | |
729 | opcode == oDynamicForward ? 1 : 0) == 0) | |
3a8aabf0 | 730 | fatal("%.200s line %d: Bad forwarding specification.", |
731 | filename, linenum); | |
3867aa0a | 732 | |
3a8aabf0 | 733 | if (*activep) { |
30573fea | 734 | if (opcode == oLocalForward || |
735 | opcode == oDynamicForward) | |
3867aa0a | 736 | add_local_forward(options, &fwd); |
3a8aabf0 | 737 | else if (opcode == oRemoteForward) |
3867aa0a | 738 | add_remote_forward(options, &fwd); |
3a8aabf0 | 739 | } |
5260325f | 740 | break; |
741 | ||
e1c5bfaf | 742 | case oClearAllForwardings: |
743 | intptr = &options->clear_forwardings; | |
744 | goto parse_flag; | |
745 | ||
5260325f | 746 | case oHost: |
747 | *activep = 0; | |
704b1659 | 748 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 749 | if (match_pattern(host, arg)) { |
750 | debug("Applying options for %.100s", arg); | |
5260325f | 751 | *activep = 1; |
752 | break; | |
753 | } | |
704b1659 | 754 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 755 | return 0; |
756 | ||
757 | case oEscapeChar: | |
758 | intptr = &options->escape_char; | |
704b1659 | 759 | arg = strdelim(&s); |
089fbbd2 | 760 | if (!arg || *arg == '\0') |
5260325f | 761 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 762 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 763 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
764 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 765 | else if (strlen(arg) == 1) |
1e3b8b07 | 766 | value = (u_char) arg[0]; |
089fbbd2 | 767 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 768 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 769 | else { |
770 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 771 | filename, linenum); |
5260325f | 772 | /* NOTREACHED */ |
773 | value = 0; /* Avoid compiler warning. */ | |
774 | } | |
775 | if (*activep && *intptr == -1) | |
776 | *intptr = value; | |
777 | break; | |
778 | ||
f811e52a | 779 | case oAddressFamily: |
780 | arg = strdelim(&s); | |
38634ff6 | 781 | if (!arg || *arg == '\0') |
782 | fatal("%s line %d: missing address family.", | |
783 | filename, linenum); | |
1572b90f | 784 | intptr = &options->address_family; |
f811e52a | 785 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 786 | value = AF_INET; |
f811e52a | 787 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 788 | value = AF_INET6; |
f811e52a | 789 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 790 | value = AF_UNSPEC; |
f811e52a | 791 | else |
792 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 793 | if (*activep && *intptr == -1) |
794 | *intptr = value; | |
f811e52a | 795 | break; |
796 | ||
cc46e2ee | 797 | case oEnableSSHKeysign: |
798 | intptr = &options->enable_ssh_keysign; | |
799 | goto parse_flag; | |
800 | ||
3a065ed0 | 801 | case oIdentitiesOnly: |
802 | intptr = &options->identities_only; | |
803 | goto parse_flag; | |
804 | ||
5d8d32a3 | 805 | case oServerAliveInterval: |
806 | intptr = &options->server_alive_interval; | |
807 | goto parse_time; | |
808 | ||
809 | case oServerAliveCountMax: | |
810 | intptr = &options->server_alive_count_max; | |
811 | goto parse_int; | |
812 | ||
61a2c1da | 813 | case oSendEnv: |
814 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
815 | if (strchr(arg, '=') != NULL) | |
816 | fatal("%s line %d: Invalid environment name.", | |
817 | filename, linenum); | |
c8c99dd5 | 818 | if (!*activep) |
819 | continue; | |
61a2c1da | 820 | if (options->num_send_env >= MAX_SEND_ENV) |
821 | fatal("%s line %d: too many send env.", | |
822 | filename, linenum); | |
823 | options->send_env[options->num_send_env++] = | |
824 | xstrdup(arg); | |
825 | } | |
826 | break; | |
827 | ||
5e96b616 | 828 | case oControlPath: |
829 | charptr = &options->control_path; | |
830 | goto parse_string; | |
831 | ||
832 | case oControlMaster: | |
833 | intptr = &options->control_master; | |
9dfd96d6 | 834 | arg = strdelim(&s); |
835 | if (!arg || *arg == '\0') | |
836 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
837 | filename, linenum); | |
838 | value = 0; /* To avoid compiler warning... */ | |
839 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
840 | value = SSHCTL_MASTER_YES; | |
841 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
842 | value = SSHCTL_MASTER_NO; | |
843 | else if (strcmp(arg, "auto") == 0) | |
844 | value = SSHCTL_MASTER_AUTO; | |
845 | else if (strcmp(arg, "ask") == 0) | |
846 | value = SSHCTL_MASTER_ASK; | |
847 | else if (strcmp(arg, "autoask") == 0) | |
848 | value = SSHCTL_MASTER_AUTO_ASK; | |
849 | else | |
850 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
851 | filename, linenum); | |
852 | if (*activep && *intptr == -1) | |
853 | *intptr = value; | |
854 | break; | |
5e96b616 | 855 | |
5c63c2ab | 856 | case oHashKnownHosts: |
857 | intptr = &options->hash_known_hosts; | |
858 | goto parse_flag; | |
859 | ||
d20f3c9e | 860 | case oTunnel: |
861 | intptr = &options->tun_open; | |
a4f24bf8 | 862 | arg = strdelim(&s); |
863 | if (!arg || *arg == '\0') | |
864 | fatal("%s line %d: Missing yes/point-to-point/" | |
865 | "ethernet/no argument.", filename, linenum); | |
866 | value = 0; /* silence compiler */ | |
867 | if (strcasecmp(arg, "ethernet") == 0) | |
868 | value = SSH_TUNMODE_ETHERNET; | |
869 | else if (strcasecmp(arg, "point-to-point") == 0) | |
870 | value = SSH_TUNMODE_POINTOPOINT; | |
871 | else if (strcasecmp(arg, "yes") == 0) | |
872 | value = SSH_TUNMODE_DEFAULT; | |
873 | else if (strcasecmp(arg, "no") == 0) | |
874 | value = SSH_TUNMODE_NO; | |
875 | else | |
876 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
877 | "no argument: %s", filename, linenum, arg); | |
878 | if (*activep) | |
879 | *intptr = value; | |
880 | break; | |
d20f3c9e | 881 | |
882 | case oTunnelDevice: | |
883 | arg = strdelim(&s); | |
884 | if (!arg || *arg == '\0') | |
885 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
886 | value = a2tun(arg, &value2); | |
a4f24bf8 | 887 | if (value == SSH_TUNID_ERR) |
d20f3c9e | 888 | fatal("%.200s line %d: Bad tun device.", filename, linenum); |
889 | if (*activep) { | |
890 | options->tun_local = value; | |
891 | options->tun_remote = value2; | |
892 | } | |
893 | break; | |
894 | ||
895 | case oLocalCommand: | |
896 | charptr = &options->local_command; | |
897 | goto parse_command; | |
898 | ||
899 | case oPermitLocalCommand: | |
900 | intptr = &options->permit_local_command; | |
901 | goto parse_flag; | |
902 | ||
7b3999b8 | 903 | case oVisualHostKey: |
904 | intptr = &options->visual_host_key; | |
905 | goto parse_flag; | |
906 | ||
80fcb74e | 907 | case oDeprecated: |
4feae93d | 908 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 909 | filename, linenum, keyword); |
4feae93d | 910 | return 0; |
80fcb74e | 911 | |
a2144546 | 912 | case oUnsupported: |
913 | error("%s line %d: Unsupported option \"%s\"", | |
914 | filename, linenum, keyword); | |
915 | return 0; | |
916 | ||
5260325f | 917 | default: |
918 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
919 | } | |
920 | ||
921 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 922 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 923 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
4e2e5cfd | 924 | filename, linenum, arg); |
089fbbd2 | 925 | } |
5260325f | 926 | return 0; |
8efc0c15 | 927 | } |
928 | ||
929 | ||
aa3378df | 930 | /* |
931 | * Reads the config file and modifies the options accordingly. Options | |
932 | * should already be initialized before this call. This never returns if | |
93111dfa | 933 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 934 | */ |
8efc0c15 | 935 | |
93111dfa | 936 | int |
f2107e97 | 937 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 938 | int checkperm) |
8efc0c15 | 939 | { |
5260325f | 940 | FILE *f; |
941 | char line[1024]; | |
942 | int active, linenum; | |
943 | int bad_options = 0; | |
944 | ||
945 | /* Open the file. */ | |
9f6cab4b | 946 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 947 | return 0; |
5260325f | 948 | |
9f6cab4b | 949 | if (checkperm) { |
950 | struct stat sb; | |
f2107e97 | 951 | |
f9ee425b | 952 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 953 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 954 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 955 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 956 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 957 | } |
958 | ||
5260325f | 959 | debug("Reading configuration data %.200s", filename); |
960 | ||
aa3378df | 961 | /* |
962 | * Mark that we are now processing the options. This flag is turned | |
963 | * on/off by Host specifications. | |
964 | */ | |
5260325f | 965 | active = 1; |
966 | linenum = 0; | |
967 | while (fgets(line, sizeof(line), f)) { | |
968 | /* Update line number counter. */ | |
969 | linenum++; | |
970 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
971 | bad_options++; | |
972 | } | |
973 | fclose(f); | |
974 | if (bad_options > 0) | |
54b974dc | 975 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 976 | filename, bad_options); |
93111dfa | 977 | return 1; |
8efc0c15 | 978 | } |
979 | ||
aa3378df | 980 | /* |
981 | * Initializes options to special values that indicate that they have not yet | |
982 | * been set. Read_config_file will only set options with this value. Options | |
983 | * are processed in the following order: command line, user config file, | |
984 | * system config file. Last, fill_default_options is called. | |
985 | */ | |
8efc0c15 | 986 | |
6ae2364d | 987 | void |
5260325f | 988 | initialize_options(Options * options) |
8efc0c15 | 989 | { |
5260325f | 990 | memset(options, 'X', sizeof(*options)); |
991 | options->forward_agent = -1; | |
992 | options->forward_x11 = -1; | |
d73a67d7 | 993 | options->forward_x11_trusted = -1; |
42ea6f5e | 994 | options->exit_on_forward_failure = -1; |
fa649821 | 995 | options->xauth_location = NULL; |
5260325f | 996 | options->gateway_ports = -1; |
997 | options->use_privileged_port = -1; | |
5260325f | 998 | options->rsa_authentication = -1; |
fa08c86b | 999 | options->pubkey_authentication = -1; |
5ba55ada | 1000 | options->challenge_response_authentication = -1; |
7364bd04 | 1001 | options->gss_authentication = -1; |
1002 | options->gss_deleg_creds = -1; | |
5260325f | 1003 | options->password_authentication = -1; |
94ec8c6b | 1004 | options->kbd_interactive_authentication = -1; |
1005 | options->kbd_interactive_devices = NULL; | |
5260325f | 1006 | options->rhosts_rsa_authentication = -1; |
8002af61 | 1007 | options->hostbased_authentication = -1; |
5260325f | 1008 | options->batch_mode = -1; |
1009 | options->check_host_ip = -1; | |
1010 | options->strict_host_key_checking = -1; | |
1011 | options->compression = -1; | |
fd573618 | 1012 | options->tcp_keep_alive = -1; |
5260325f | 1013 | options->compression_level = -1; |
1014 | options->port = -1; | |
1572b90f | 1015 | options->address_family = -1; |
5260325f | 1016 | options->connection_attempts = -1; |
09ab3296 | 1017 | options->connection_timeout = -1; |
5260325f | 1018 | options->number_of_password_prompts = -1; |
1019 | options->cipher = -1; | |
a8be9f80 | 1020 | options->ciphers = NULL; |
b2552997 | 1021 | options->macs = NULL; |
e961a8f9 | 1022 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 1023 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 1024 | options->num_identity_files = 0; |
1025 | options->hostname = NULL; | |
8abcdba4 | 1026 | options->host_key_alias = NULL; |
5260325f | 1027 | options->proxy_command = NULL; |
1028 | options->user = NULL; | |
1029 | options->escape_char = -1; | |
1030 | options->system_hostfile = NULL; | |
1031 | options->user_hostfile = NULL; | |
a306f2dd | 1032 | options->system_hostfile2 = NULL; |
1033 | options->user_hostfile2 = NULL; | |
5260325f | 1034 | options->num_local_forwards = 0; |
1035 | options->num_remote_forwards = 0; | |
e1c5bfaf | 1036 | options->clear_forwardings = -1; |
5eaf8578 | 1037 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 1038 | options->preferred_authentications = NULL; |
3435f5a6 | 1039 | options->bind_address = NULL; |
9ff6f66f | 1040 | options->smartcard_device = NULL; |
cc46e2ee | 1041 | options->enable_ssh_keysign = - 1; |
8bbc048a | 1042 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 1043 | options->identities_only = - 1; |
ffd7b36b | 1044 | options->rekey_limit = - 1; |
21289cd0 | 1045 | options->verify_host_key_dns = -1; |
5d8d32a3 | 1046 | options->server_alive_interval = -1; |
1047 | options->server_alive_count_max = -1; | |
61a2c1da | 1048 | options->num_send_env = 0; |
5e96b616 | 1049 | options->control_path = NULL; |
1050 | options->control_master = -1; | |
5c63c2ab | 1051 | options->hash_known_hosts = -1; |
d20f3c9e | 1052 | options->tun_open = -1; |
1053 | options->tun_local = -1; | |
1054 | options->tun_remote = -1; | |
1055 | options->local_command = NULL; | |
1056 | options->permit_local_command = -1; | |
7b3999b8 | 1057 | options->visual_host_key = -1; |
8efc0c15 | 1058 | } |
1059 | ||
aa3378df | 1060 | /* |
1061 | * Called after processing other sources of option data, this fills those | |
1062 | * options for which no value has been specified with their default values. | |
1063 | */ | |
8efc0c15 | 1064 | |
6ae2364d | 1065 | void |
5260325f | 1066 | fill_default_options(Options * options) |
8efc0c15 | 1067 | { |
d2c46e77 | 1068 | int len; |
1069 | ||
5260325f | 1070 | if (options->forward_agent == -1) |
71276795 | 1071 | options->forward_agent = 0; |
5260325f | 1072 | if (options->forward_x11 == -1) |
c8d54615 | 1073 | options->forward_x11 = 0; |
d73a67d7 | 1074 | if (options->forward_x11_trusted == -1) |
1075 | options->forward_x11_trusted = 0; | |
42ea6f5e | 1076 | if (options->exit_on_forward_failure == -1) |
1077 | options->exit_on_forward_failure = 0; | |
fa649821 | 1078 | if (options->xauth_location == NULL) |
fd9ede94 | 1079 | options->xauth_location = _PATH_XAUTH; |
5260325f | 1080 | if (options->gateway_ports == -1) |
1081 | options->gateway_ports = 0; | |
1082 | if (options->use_privileged_port == -1) | |
d5ebca2b | 1083 | options->use_privileged_port = 0; |
5260325f | 1084 | if (options->rsa_authentication == -1) |
1085 | options->rsa_authentication = 1; | |
fa08c86b | 1086 | if (options->pubkey_authentication == -1) |
1087 | options->pubkey_authentication = 1; | |
5ba55ada | 1088 | if (options->challenge_response_authentication == -1) |
10a2cbef | 1089 | options->challenge_response_authentication = 1; |
7364bd04 | 1090 | if (options->gss_authentication == -1) |
2ecb78df | 1091 | options->gss_authentication = 0; |
7364bd04 | 1092 | if (options->gss_deleg_creds == -1) |
1093 | options->gss_deleg_creds = 0; | |
5260325f | 1094 | if (options->password_authentication == -1) |
1095 | options->password_authentication = 1; | |
94ec8c6b | 1096 | if (options->kbd_interactive_authentication == -1) |
d464095c | 1097 | options->kbd_interactive_authentication = 1; |
5260325f | 1098 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 1099 | options->rhosts_rsa_authentication = 0; |
8002af61 | 1100 | if (options->hostbased_authentication == -1) |
1101 | options->hostbased_authentication = 0; | |
5260325f | 1102 | if (options->batch_mode == -1) |
1103 | options->batch_mode = 0; | |
1104 | if (options->check_host_ip == -1) | |
1105 | options->check_host_ip = 1; | |
1106 | if (options->strict_host_key_checking == -1) | |
1107 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1108 | if (options->compression == -1) | |
1109 | options->compression = 0; | |
fd573618 | 1110 | if (options->tcp_keep_alive == -1) |
1111 | options->tcp_keep_alive = 1; | |
5260325f | 1112 | if (options->compression_level == -1) |
1113 | options->compression_level = 6; | |
1114 | if (options->port == -1) | |
1115 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1116 | if (options->address_family == -1) |
1117 | options->address_family = AF_UNSPEC; | |
5260325f | 1118 | if (options->connection_attempts == -1) |
ce773142 | 1119 | options->connection_attempts = 1; |
5260325f | 1120 | if (options->number_of_password_prompts == -1) |
1121 | options->number_of_password_prompts = 3; | |
1122 | /* Selected in ssh_login(). */ | |
1123 | if (options->cipher == -1) | |
1124 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1125 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1126 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1127 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1128 | if (options->protocol == SSH_PROTO_UNKNOWN) |
3e587cc3 | 1129 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
5260325f | 1130 | if (options->num_identity_files == 0) { |
fa08c86b | 1131 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1132 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1133 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1134 | xmalloc(len); |
1135 | snprintf(options->identity_files[options->num_identity_files++], | |
1136 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1137 | } |
1138 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1139 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1140 | options->identity_files[options->num_identity_files] = | |
1141 | xmalloc(len); | |
1142 | snprintf(options->identity_files[options->num_identity_files++], | |
1143 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1144 | ||
d2c46e77 | 1145 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1146 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1147 | xmalloc(len); |
1148 | snprintf(options->identity_files[options->num_identity_files++], | |
1149 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1150 | } |
a306f2dd | 1151 | } |
5260325f | 1152 | if (options->escape_char == -1) |
1153 | options->escape_char = '~'; | |
1154 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1155 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1156 | if (options->user_hostfile == NULL) |
42f11eb2 | 1157 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1158 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1159 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1160 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1161 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1162 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1163 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1164 | if (options->clear_forwardings == 1) |
1165 | clear_forwardings(options); | |
8bbc048a | 1166 | if (options->no_host_authentication_for_localhost == - 1) |
1167 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1168 | if (options->identities_only == -1) |
1169 | options->identities_only = 0; | |
cc46e2ee | 1170 | if (options->enable_ssh_keysign == -1) |
1171 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1172 | if (options->rekey_limit == -1) |
1173 | options->rekey_limit = 0; | |
21289cd0 | 1174 | if (options->verify_host_key_dns == -1) |
1175 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1176 | if (options->server_alive_interval == -1) |
1177 | options->server_alive_interval = 0; | |
1178 | if (options->server_alive_count_max == -1) | |
1179 | options->server_alive_count_max = 3; | |
5e96b616 | 1180 | if (options->control_master == -1) |
1181 | options->control_master = 0; | |
5c63c2ab | 1182 | if (options->hash_known_hosts == -1) |
1183 | options->hash_known_hosts = 0; | |
d20f3c9e | 1184 | if (options->tun_open == -1) |
a4f24bf8 | 1185 | options->tun_open = SSH_TUNMODE_NO; |
1186 | if (options->tun_local == -1) | |
1187 | options->tun_local = SSH_TUNID_ANY; | |
1188 | if (options->tun_remote == -1) | |
1189 | options->tun_remote = SSH_TUNID_ANY; | |
d20f3c9e | 1190 | if (options->permit_local_command == -1) |
1191 | options->permit_local_command = 0; | |
7b3999b8 | 1192 | if (options->visual_host_key == -1) |
1193 | options->visual_host_key = 0; | |
d20f3c9e | 1194 | /* options->local_command should not be set by default */ |
5260325f | 1195 | /* options->proxy_command should not be set by default */ |
1196 | /* options->user will be set in the main program if appropriate */ | |
1197 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1198 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1199 | /* options->preferred_authentications will be set in ssh */ |
8efc0c15 | 1200 | } |
3867aa0a | 1201 | |
1202 | /* | |
1203 | * parse_forward | |
1204 | * parses a string containing a port forwarding specification of the form: | |
30573fea | 1205 | * dynamicfwd == 0 |
3867aa0a | 1206 | * [listenhost:]listenport:connecthost:connectport |
30573fea | 1207 | * dynamicfwd == 1 |
1208 | * [listenhost:]listenport | |
3867aa0a | 1209 | * returns number of arguments parsed or zero on error |
1210 | */ | |
1211 | int | |
30573fea | 1212 | parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd) |
3867aa0a | 1213 | { |
1214 | int i; | |
1215 | char *p, *cp, *fwdarg[4]; | |
1216 | ||
1217 | memset(fwd, '\0', sizeof(*fwd)); | |
1218 | ||
1219 | cp = p = xstrdup(fwdspec); | |
1220 | ||
1221 | /* skip leading spaces */ | |
f48fbab3 | 1222 | while (isspace(*cp)) |
3867aa0a | 1223 | cp++; |
1224 | ||
1225 | for (i = 0; i < 4; ++i) | |
1226 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1227 | break; | |
1228 | ||
1229 | /* Check for trailing garbage in 4-arg case*/ | |
1230 | if (cp != NULL) | |
1231 | i = 0; /* failure */ | |
1232 | ||
1233 | switch (i) { | |
30573fea | 1234 | case 1: |
1235 | fwd->listen_host = NULL; | |
1236 | fwd->listen_port = a2port(fwdarg[0]); | |
1237 | fwd->connect_host = xstrdup("socks"); | |
1238 | break; | |
1239 | ||
1240 | case 2: | |
1241 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1242 | fwd->listen_port = a2port(fwdarg[1]); | |
1243 | fwd->connect_host = xstrdup("socks"); | |
1244 | break; | |
1245 | ||
3867aa0a | 1246 | case 3: |
1247 | fwd->listen_host = NULL; | |
1248 | fwd->listen_port = a2port(fwdarg[0]); | |
1249 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1250 | fwd->connect_port = a2port(fwdarg[2]); | |
1251 | break; | |
1252 | ||
1253 | case 4: | |
1254 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1255 | fwd->listen_port = a2port(fwdarg[1]); | |
1256 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1257 | fwd->connect_port = a2port(fwdarg[3]); | |
1258 | break; | |
1259 | default: | |
1260 | i = 0; /* failure */ | |
1261 | } | |
1262 | ||
1263 | xfree(p); | |
1264 | ||
30573fea | 1265 | if (dynamicfwd) { |
1266 | if (!(i == 1 || i == 2)) | |
1267 | goto fail_free; | |
1268 | } else { | |
1269 | if (!(i == 3 || i == 4)) | |
1270 | goto fail_free; | |
1271 | if (fwd->connect_port == 0) | |
1272 | goto fail_free; | |
1273 | } | |
1274 | ||
1275 | if (fwd->listen_port == 0) | |
3867aa0a | 1276 | goto fail_free; |
1277 | ||
1278 | if (fwd->connect_host != NULL && | |
1279 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1280 | goto fail_free; | |
1281 | ||
1282 | return (i); | |
1283 | ||
1284 | fail_free: | |
1285 | if (fwd->connect_host != NULL) | |
1286 | xfree(fwd->connect_host); | |
1287 | if (fwd->listen_host != NULL) | |
1288 | xfree(fwd->listen_host); | |
1289 | return (0); | |
1290 | } |