]>
Commit | Line | Data |
---|---|---|
8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * Functions for reading the configuration files. |
6ae2364d | 6 | * |
bcbf86ec | 7 | * As far as I am concerned, the code I have written for this software |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
14 | #include "includes.h" | |
d20f3c9e | 15 | RCSID("$OpenBSD: readconf.c,v 1.144 2005/12/06 22:38:27 reyk Exp $"); |
8efc0c15 | 16 | |
17 | #include "ssh.h" | |
8efc0c15 | 18 | #include "xmalloc.h" |
a8be9f80 | 19 | #include "compat.h" |
42f11eb2 | 20 | #include "cipher.h" |
21 | #include "pathnames.h" | |
22 | #include "log.h" | |
23 | #include "readconf.h" | |
24 | #include "match.h" | |
25 | #include "misc.h" | |
b2552997 | 26 | #include "kex.h" |
27 | #include "mac.h" | |
8efc0c15 | 28 | |
29 | /* Format of the configuration file: | |
30 | ||
31 | # Configuration data is parsed as follows: | |
32 | # 1. command line options | |
33 | # 2. user-specific file | |
34 | # 3. system-wide file | |
35 | # Any configuration value is only changed the first time it is set. | |
36 | # Thus, host-specific definitions should be at the beginning of the | |
37 | # configuration file, and defaults at the end. | |
38 | ||
39 | # Host-specific declarations. These may override anything above. A single | |
40 | # host may match multiple declarations; these are processed in the order | |
41 | # that they are given in. | |
42 | ||
43 | Host *.ngs.fi ngs.fi | |
80fcb74e | 44 | User foo |
8efc0c15 | 45 | |
46 | Host fake.com | |
47 | HostName another.host.name.real.org | |
48 | User blaah | |
49 | Port 34289 | |
50 | ForwardX11 no | |
51 | ForwardAgent no | |
52 | ||
53 | Host books.com | |
54 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
55 | Cipher 3des | |
56 | ||
57 | Host fascist.blob.com | |
58 | Port 23123 | |
59 | User tylonen | |
8efc0c15 | 60 | PasswordAuthentication no |
61 | ||
62 | Host puukko.hut.fi | |
63 | User t35124p | |
64 | ProxyCommand ssh-proxy %h %p | |
65 | ||
66 | Host *.fr | |
80fcb74e | 67 | PublicKeyAuthentication no |
8efc0c15 | 68 | |
69 | Host *.su | |
70 | Cipher none | |
71 | PasswordAuthentication no | |
72 | ||
d20f3c9e | 73 | Host vpn.fake.com |
74 | Tunnel yes | |
75 | TunnelDevice 3 | |
76 | ||
8efc0c15 | 77 | # Defaults for various options |
78 | Host * | |
79 | ForwardAgent no | |
fa08c86b | 80 | ForwardX11 no |
8efc0c15 | 81 | PasswordAuthentication yes |
82 | RSAAuthentication yes | |
83 | RhostsRSAAuthentication yes | |
8efc0c15 | 84 | StrictHostKeyChecking yes |
fd573618 | 85 | TcpKeepAlive no |
8efc0c15 | 86 | IdentityFile ~/.ssh/identity |
87 | Port 22 | |
88 | EscapeChar ~ | |
89 | ||
90 | */ | |
91 | ||
92 | /* Keyword tokens. */ | |
93 | ||
5260325f | 94 | typedef enum { |
95 | oBadOption, | |
d73a67d7 | 96 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
7203d6bb | 97 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 98 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 99 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
100 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
101 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
102 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 103 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 104 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 105 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 106 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 107 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 108 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 109 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 110 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 111 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 112 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 113 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
d20f3c9e | 114 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
a2144546 | 115 | oDeprecated, oUnsupported |
8efc0c15 | 116 | } OpCodes; |
117 | ||
118 | /* Textual representations of the tokens. */ | |
119 | ||
5260325f | 120 | static struct { |
121 | const char *name; | |
122 | OpCodes opcode; | |
123 | } keywords[] = { | |
124 | { "forwardagent", oForwardAgent }, | |
125 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 126 | { "forwardx11trusted", oForwardX11Trusted }, |
fa649821 | 127 | { "xauthlocation", oXAuthLocation }, |
5260325f | 128 | { "gatewayports", oGatewayPorts }, |
129 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 130 | { "rhostsauthentication", oDeprecated }, |
5260325f | 131 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 132 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
133 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 134 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 135 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 136 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 137 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 138 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 139 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
140 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
141 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 142 | { "kerberosauthentication", oUnsupported }, |
143 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 144 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 145 | #if defined(GSSAPI) |
146 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 147 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
148 | #else | |
149 | { "gssapiauthentication", oUnsupported }, | |
150 | { "gssapidelegatecredentials", oUnsupported }, | |
151 | #endif | |
80fcb74e | 152 | { "fallbacktorsh", oDeprecated }, |
153 | { "usersh", oDeprecated }, | |
5260325f | 154 | { "identityfile", oIdentityFile }, |
fa08c86b | 155 | { "identityfile2", oIdentityFile }, /* alias */ |
3a065ed0 | 156 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 157 | { "hostname", oHostName }, |
8abcdba4 | 158 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 159 | { "proxycommand", oProxyCommand }, |
160 | { "port", oPort }, | |
161 | { "cipher", oCipher }, | |
a8be9f80 | 162 | { "ciphers", oCiphers }, |
b2552997 | 163 | { "macs", oMacs }, |
a8be9f80 | 164 | { "protocol", oProtocol }, |
5260325f | 165 | { "remoteforward", oRemoteForward }, |
166 | { "localforward", oLocalForward }, | |
167 | { "user", oUser }, | |
168 | { "host", oHost }, | |
169 | { "escapechar", oEscapeChar }, | |
5260325f | 170 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
f49bc4f7 | 171 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ |
a306f2dd | 172 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
f49bc4f7 | 173 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 174 | { "connectionattempts", oConnectionAttempts }, |
175 | { "batchmode", oBatchMode }, | |
176 | { "checkhostip", oCheckHostIP }, | |
177 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
178 | { "compression", oCompression }, | |
179 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 180 | { "tcpkeepalive", oTCPKeepAlive }, |
181 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 182 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 183 | { "loglevel", oLogLevel }, |
0490e609 | 184 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 185 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 186 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 187 | { "bindaddress", oBindAddress }, |
a2144546 | 188 | #ifdef SMARTCARD |
eea098a3 | 189 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 190 | #else |
191 | { "smartcarddevice", oUnsupported }, | |
192 | #endif | |
184eed6a | 193 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 194 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 195 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 196 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 197 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 198 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 199 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 200 | { "serveraliveinterval", oServerAliveInterval }, |
201 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 202 | { "sendenv", oSendEnv }, |
5e96b616 | 203 | { "controlpath", oControlPath }, |
204 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 205 | { "hashknownhosts", oHashKnownHosts }, |
d20f3c9e | 206 | { "tunnel", oTunnel }, |
207 | { "tunneldevice", oTunnelDevice }, | |
208 | { "localcommand", oLocalCommand }, | |
209 | { "permitlocalcommand", oPermitLocalCommand }, | |
17a3011c | 210 | { NULL, oBadOption } |
6a17f9c2 | 211 | }; |
212 | ||
aa3378df | 213 | /* |
214 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
215 | * error. | |
216 | */ | |
8efc0c15 | 217 | |
6ae2364d | 218 | void |
3867aa0a | 219 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 220 | { |
5260325f | 221 | Forward *fwd; |
e6f15ed1 | 222 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 223 | extern uid_t original_real_uid; |
3867aa0a | 224 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 225 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 226 | #endif |
5260325f | 227 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
228 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
229 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 230 | |
231 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
232 | NULL : xstrdup(newfwd->listen_host); | |
233 | fwd->listen_port = newfwd->listen_port; | |
234 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
235 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 236 | } |
237 | ||
aa3378df | 238 | /* |
239 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
240 | * an error. | |
241 | */ | |
8efc0c15 | 242 | |
6ae2364d | 243 | void |
3867aa0a | 244 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 245 | { |
5260325f | 246 | Forward *fwd; |
247 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
248 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 249 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 250 | fwd = &options->remote_forwards[options->num_remote_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 | ||
e1c5bfaf | 259 | static void |
260 | clear_forwardings(Options *options) | |
261 | { | |
262 | int i; | |
263 | ||
3867aa0a | 264 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 265 | if (options->local_forwards[i].listen_host != NULL) |
266 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 267 | xfree(options->local_forwards[i].connect_host); |
268 | } | |
e1c5bfaf | 269 | options->num_local_forwards = 0; |
3867aa0a | 270 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 271 | if (options->remote_forwards[i].listen_host != NULL) |
272 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 273 | xfree(options->remote_forwards[i].connect_host); |
274 | } | |
e1c5bfaf | 275 | options->num_remote_forwards = 0; |
d20f3c9e | 276 | options->tun_open = 0; |
e1c5bfaf | 277 | } |
278 | ||
aa3378df | 279 | /* |
6be9a5e8 | 280 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 281 | */ |
8efc0c15 | 282 | |
6ae2364d | 283 | static OpCodes |
5260325f | 284 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 285 | { |
1e3b8b07 | 286 | u_int i; |
8efc0c15 | 287 | |
5260325f | 288 | for (i = 0; keywords[i].name; i++) |
aa3378df | 289 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 290 | return keywords[i].opcode; |
8efc0c15 | 291 | |
b7c70970 | 292 | error("%s: line %d: Bad configuration option: %s", |
293 | filename, linenum, cp); | |
5260325f | 294 | return oBadOption; |
8efc0c15 | 295 | } |
296 | ||
aa3378df | 297 | /* |
298 | * Processes a single option line as used in the configuration files. This | |
299 | * only sets those values that have not already been set. | |
300 | */ | |
d718e75d | 301 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 302 | |
e7c0f9d5 | 303 | int |
304 | process_config_line(Options *options, const char *host, | |
5260325f | 305 | char *line, const char *filename, int linenum, |
306 | int *activep) | |
8efc0c15 | 307 | { |
3867aa0a | 308 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
d20f3c9e | 309 | int opcode, *intptr, value, value2; |
d718e75d | 310 | size_t len; |
3867aa0a | 311 | Forward fwd; |
5260325f | 312 | |
204fde99 | 313 | /* Strip trailing whitespace */ |
f8cc7664 | 314 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 315 | if (strchr(WHITESPACE, line[len]) == NULL) |
316 | break; | |
317 | line[len] = '\0'; | |
318 | } | |
319 | ||
704b1659 | 320 | s = line; |
321 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
322 | keyword = strdelim(&s); | |
323 | /* Ignore leading whitespace. */ | |
324 | if (*keyword == '\0') | |
325 | keyword = strdelim(&s); | |
42f11eb2 | 326 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 327 | return 0; |
328 | ||
089fbbd2 | 329 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 330 | |
331 | switch (opcode) { | |
332 | case oBadOption: | |
aa3378df | 333 | /* don't panic, but count bad options */ |
334 | return -1; | |
5260325f | 335 | /* NOTREACHED */ |
09ab3296 | 336 | case oConnectTimeout: |
337 | intptr = &options->connection_timeout; | |
5d8d32a3 | 338 | parse_time: |
09ab3296 | 339 | arg = strdelim(&s); |
340 | if (!arg || *arg == '\0') | |
341 | fatal("%s line %d: missing time value.", | |
342 | filename, linenum); | |
343 | if ((value = convtime(arg)) == -1) | |
344 | fatal("%s line %d: invalid time value.", | |
345 | filename, linenum); | |
346 | if (*intptr == -1) | |
347 | *intptr = value; | |
348 | break; | |
349 | ||
5260325f | 350 | case oForwardAgent: |
351 | intptr = &options->forward_agent; | |
352 | parse_flag: | |
704b1659 | 353 | arg = strdelim(&s); |
089fbbd2 | 354 | if (!arg || *arg == '\0') |
5260325f | 355 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
356 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 357 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 358 | value = 1; |
089fbbd2 | 359 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 360 | value = 0; |
361 | else | |
362 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
363 | if (*activep && *intptr == -1) | |
364 | *intptr = value; | |
365 | break; | |
366 | ||
367 | case oForwardX11: | |
368 | intptr = &options->forward_x11; | |
369 | goto parse_flag; | |
370 | ||
d73a67d7 | 371 | case oForwardX11Trusted: |
372 | intptr = &options->forward_x11_trusted; | |
373 | goto parse_flag; | |
374 | ||
5260325f | 375 | case oGatewayPorts: |
376 | intptr = &options->gateway_ports; | |
377 | goto parse_flag; | |
378 | ||
379 | case oUsePrivilegedPort: | |
380 | intptr = &options->use_privileged_port; | |
381 | goto parse_flag; | |
382 | ||
5260325f | 383 | case oPasswordAuthentication: |
384 | intptr = &options->password_authentication; | |
385 | goto parse_flag; | |
386 | ||
94ec8c6b | 387 | case oKbdInteractiveAuthentication: |
388 | intptr = &options->kbd_interactive_authentication; | |
389 | goto parse_flag; | |
390 | ||
391 | case oKbdInteractiveDevices: | |
392 | charptr = &options->kbd_interactive_devices; | |
393 | goto parse_string; | |
394 | ||
fa08c86b | 395 | case oPubkeyAuthentication: |
396 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 397 | goto parse_flag; |
398 | ||
5260325f | 399 | case oRSAAuthentication: |
400 | intptr = &options->rsa_authentication; | |
401 | goto parse_flag; | |
402 | ||
403 | case oRhostsRSAAuthentication: | |
404 | intptr = &options->rhosts_rsa_authentication; | |
405 | goto parse_flag; | |
406 | ||
8002af61 | 407 | case oHostbasedAuthentication: |
408 | intptr = &options->hostbased_authentication; | |
409 | goto parse_flag; | |
410 | ||
d464095c | 411 | case oChallengeResponseAuthentication: |
5ba55ada | 412 | intptr = &options->challenge_response_authentication; |
5260325f | 413 | goto parse_flag; |
d0ec7f42 | 414 | |
7364bd04 | 415 | case oGssAuthentication: |
416 | intptr = &options->gss_authentication; | |
417 | goto parse_flag; | |
418 | ||
419 | case oGssDelegateCreds: | |
420 | intptr = &options->gss_deleg_creds; | |
421 | goto parse_flag; | |
422 | ||
5260325f | 423 | case oBatchMode: |
424 | intptr = &options->batch_mode; | |
425 | goto parse_flag; | |
426 | ||
427 | case oCheckHostIP: | |
428 | intptr = &options->check_host_ip; | |
429 | goto parse_flag; | |
430 | ||
21289cd0 | 431 | case oVerifyHostKeyDNS: |
432 | intptr = &options->verify_host_key_dns; | |
0161a13d | 433 | goto parse_yesnoask; |
21289cd0 | 434 | |
5260325f | 435 | case oStrictHostKeyChecking: |
436 | intptr = &options->strict_host_key_checking; | |
0161a13d | 437 | parse_yesnoask: |
704b1659 | 438 | arg = strdelim(&s); |
089fbbd2 | 439 | if (!arg || *arg == '\0') |
c76c8819 | 440 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 441 | filename, linenum); |
5260325f | 442 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 443 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 444 | value = 1; |
089fbbd2 | 445 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 446 | value = 0; |
089fbbd2 | 447 | else if (strcmp(arg, "ask") == 0) |
5260325f | 448 | value = 2; |
449 | else | |
450 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
451 | if (*activep && *intptr == -1) | |
452 | *intptr = value; | |
453 | break; | |
454 | ||
455 | case oCompression: | |
456 | intptr = &options->compression; | |
457 | goto parse_flag; | |
458 | ||
fd573618 | 459 | case oTCPKeepAlive: |
460 | intptr = &options->tcp_keep_alive; | |
5260325f | 461 | goto parse_flag; |
462 | ||
8bbc048a | 463 | case oNoHostAuthenticationForLocalhost: |
464 | intptr = &options->no_host_authentication_for_localhost; | |
465 | goto parse_flag; | |
466 | ||
5260325f | 467 | case oNumberOfPasswordPrompts: |
468 | intptr = &options->number_of_password_prompts; | |
469 | goto parse_int; | |
470 | ||
471 | case oCompressionLevel: | |
472 | intptr = &options->compression_level; | |
473 | goto parse_int; | |
474 | ||
ffd7b36b | 475 | case oRekeyLimit: |
476 | intptr = &options->rekey_limit; | |
477 | arg = strdelim(&s); | |
478 | if (!arg || *arg == '\0') | |
479 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
480 | if (arg[0] < '0' || arg[0] > '9') | |
481 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
482 | value = strtol(arg, &endofnumber, 10); | |
483 | if (arg == endofnumber) | |
484 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
485 | switch (toupper(*endofnumber)) { | |
486 | case 'K': | |
487 | value *= 1<<10; | |
488 | break; | |
489 | case 'M': | |
490 | value *= 1<<20; | |
491 | break; | |
492 | case 'G': | |
493 | value *= 1<<30; | |
494 | break; | |
495 | } | |
496 | if (*activep && *intptr == -1) | |
497 | *intptr = value; | |
498 | break; | |
499 | ||
5260325f | 500 | case oIdentityFile: |
704b1659 | 501 | arg = strdelim(&s); |
089fbbd2 | 502 | if (!arg || *arg == '\0') |
5260325f | 503 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
504 | if (*activep) { | |
fa08c86b | 505 | intptr = &options->num_identity_files; |
a306f2dd | 506 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 507 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 508 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
fa08c86b | 509 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 510 | *charptr = xstrdup(arg); |
a306f2dd | 511 | *intptr = *intptr + 1; |
5260325f | 512 | } |
513 | break; | |
514 | ||
fa649821 | 515 | case oXAuthLocation: |
516 | charptr=&options->xauth_location; | |
517 | goto parse_string; | |
518 | ||
5260325f | 519 | case oUser: |
520 | charptr = &options->user; | |
521 | parse_string: | |
704b1659 | 522 | arg = strdelim(&s); |
089fbbd2 | 523 | if (!arg || *arg == '\0') |
5260325f | 524 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
525 | if (*activep && *charptr == NULL) | |
089fbbd2 | 526 | *charptr = xstrdup(arg); |
5260325f | 527 | break; |
528 | ||
529 | case oGlobalKnownHostsFile: | |
530 | charptr = &options->system_hostfile; | |
531 | goto parse_string; | |
532 | ||
533 | case oUserKnownHostsFile: | |
534 | charptr = &options->user_hostfile; | |
535 | goto parse_string; | |
536 | ||
a306f2dd | 537 | case oGlobalKnownHostsFile2: |
538 | charptr = &options->system_hostfile2; | |
539 | goto parse_string; | |
540 | ||
541 | case oUserKnownHostsFile2: | |
542 | charptr = &options->user_hostfile2; | |
543 | goto parse_string; | |
544 | ||
5260325f | 545 | case oHostName: |
546 | charptr = &options->hostname; | |
547 | goto parse_string; | |
548 | ||
8abcdba4 | 549 | case oHostKeyAlias: |
550 | charptr = &options->host_key_alias; | |
551 | goto parse_string; | |
552 | ||
cab80f75 | 553 | case oPreferredAuthentications: |
554 | charptr = &options->preferred_authentications; | |
555 | goto parse_string; | |
556 | ||
3435f5a6 | 557 | case oBindAddress: |
558 | charptr = &options->bind_address; | |
559 | goto parse_string; | |
560 | ||
eea098a3 | 561 | case oSmartcardDevice: |
9ff6f66f | 562 | charptr = &options->smartcard_device; |
563 | goto parse_string; | |
eea098a3 | 564 | |
5260325f | 565 | case oProxyCommand: |
d20f3c9e | 566 | charptr = &options->proxy_command; |
567 | parse_command: | |
2d9c1828 | 568 | if (s == NULL) |
569 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
d718e75d | 570 | len = strspn(s, WHITESPACE "="); |
5260325f | 571 | if (*activep && *charptr == NULL) |
d718e75d | 572 | *charptr = xstrdup(s + len); |
5260325f | 573 | return 0; |
574 | ||
575 | case oPort: | |
576 | intptr = &options->port; | |
577 | parse_int: | |
704b1659 | 578 | arg = strdelim(&s); |
089fbbd2 | 579 | if (!arg || *arg == '\0') |
5260325f | 580 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 581 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 582 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 583 | |
584 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 585 | value = strtol(arg, &endofnumber, 0); |
586 | if (arg == endofnumber) | |
aa3378df | 587 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 588 | if (*activep && *intptr == -1) |
589 | *intptr = value; | |
590 | break; | |
591 | ||
592 | case oConnectionAttempts: | |
593 | intptr = &options->connection_attempts; | |
594 | goto parse_int; | |
595 | ||
596 | case oCipher: | |
597 | intptr = &options->cipher; | |
704b1659 | 598 | arg = strdelim(&s); |
089fbbd2 | 599 | if (!arg || *arg == '\0') |
71276795 | 600 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 601 | value = cipher_number(arg); |
5260325f | 602 | if (value == -1) |
603 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 604 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 605 | if (*activep && *intptr == -1) |
606 | *intptr = value; | |
607 | break; | |
608 | ||
a8be9f80 | 609 | case oCiphers: |
704b1659 | 610 | arg = strdelim(&s); |
089fbbd2 | 611 | if (!arg || *arg == '\0') |
71276795 | 612 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 613 | if (!ciphers_valid(arg)) |
d0c832f3 | 614 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 615 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 616 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 617 | options->ciphers = xstrdup(arg); |
a8be9f80 | 618 | break; |
619 | ||
b2552997 | 620 | case oMacs: |
621 | arg = strdelim(&s); | |
622 | if (!arg || *arg == '\0') | |
623 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
624 | if (!mac_valid(arg)) | |
625 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 626 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 627 | if (*activep && options->macs == NULL) |
628 | options->macs = xstrdup(arg); | |
629 | break; | |
630 | ||
e961a8f9 | 631 | case oHostKeyAlgorithms: |
632 | arg = strdelim(&s); | |
633 | if (!arg || *arg == '\0') | |
634 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
635 | if (!key_names_valid2(arg)) | |
636 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 637 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 638 | if (*activep && options->hostkeyalgorithms == NULL) |
639 | options->hostkeyalgorithms = xstrdup(arg); | |
640 | break; | |
641 | ||
a8be9f80 | 642 | case oProtocol: |
643 | intptr = &options->protocol; | |
704b1659 | 644 | arg = strdelim(&s); |
089fbbd2 | 645 | if (!arg || *arg == '\0') |
71276795 | 646 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 647 | value = proto_spec(arg); |
a8be9f80 | 648 | if (value == SSH_PROTO_UNKNOWN) |
649 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 650 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 651 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
652 | *intptr = value; | |
653 | break; | |
654 | ||
5260325f | 655 | case oLogLevel: |
656 | intptr = (int *) &options->log_level; | |
704b1659 | 657 | arg = strdelim(&s); |
089fbbd2 | 658 | value = log_level_number(arg); |
5eaf8578 | 659 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 660 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 661 | filename, linenum, arg ? arg : "<NONE>"); |
5eaf8578 | 662 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) |
5260325f | 663 | *intptr = (LogLevel) value; |
664 | break; | |
665 | ||
5260325f | 666 | case oLocalForward: |
3a8aabf0 | 667 | case oRemoteForward: |
704b1659 | 668 | arg = strdelim(&s); |
3867aa0a | 669 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 670 | fatal("%.200s line %d: Missing port argument.", |
671 | filename, linenum); | |
3867aa0a | 672 | arg2 = strdelim(&s); |
673 | if (arg2 == NULL || *arg2 == '\0') | |
674 | fatal("%.200s line %d: Missing target argument.", | |
3a8aabf0 | 675 | filename, linenum); |
3867aa0a | 676 | |
677 | /* construct a string for parse_forward */ | |
678 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
679 | ||
680 | if (parse_forward(&fwd, fwdarg) == 0) | |
3a8aabf0 | 681 | fatal("%.200s line %d: Bad forwarding specification.", |
682 | filename, linenum); | |
3867aa0a | 683 | |
3a8aabf0 | 684 | if (*activep) { |
685 | if (opcode == oLocalForward) | |
3867aa0a | 686 | add_local_forward(options, &fwd); |
3a8aabf0 | 687 | else if (opcode == oRemoteForward) |
3867aa0a | 688 | add_remote_forward(options, &fwd); |
3a8aabf0 | 689 | } |
5260325f | 690 | break; |
691 | ||
0490e609 | 692 | case oDynamicForward: |
693 | arg = strdelim(&s); | |
694 | if (!arg || *arg == '\0') | |
695 | fatal("%.200s line %d: Missing port argument.", | |
696 | filename, linenum); | |
3867aa0a | 697 | memset(&fwd, '\0', sizeof(fwd)); |
698 | fwd.connect_host = "socks"; | |
699 | fwd.listen_host = hpdelim(&arg); | |
700 | if (fwd.listen_host == NULL || | |
701 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
702 | fatal("%.200s line %d: Bad forwarding specification.", | |
703 | filename, linenum); | |
704 | if (arg) { | |
705 | fwd.listen_port = a2port(arg); | |
706 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
707 | } else { | |
708 | fwd.listen_port = a2port(fwd.listen_host); | |
4c38e9c6 | 709 | fwd.listen_host = NULL; |
3867aa0a | 710 | } |
711 | if (fwd.listen_port == 0) | |
0490e609 | 712 | fatal("%.200s line %d: Badly formatted port number.", |
713 | filename, linenum); | |
14e4a15f | 714 | if (*activep) |
3867aa0a | 715 | add_local_forward(options, &fwd); |
8002af61 | 716 | break; |
0490e609 | 717 | |
e1c5bfaf | 718 | case oClearAllForwardings: |
719 | intptr = &options->clear_forwardings; | |
720 | goto parse_flag; | |
721 | ||
5260325f | 722 | case oHost: |
723 | *activep = 0; | |
704b1659 | 724 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 725 | if (match_pattern(host, arg)) { |
726 | debug("Applying options for %.100s", arg); | |
5260325f | 727 | *activep = 1; |
728 | break; | |
729 | } | |
704b1659 | 730 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 731 | return 0; |
732 | ||
733 | case oEscapeChar: | |
734 | intptr = &options->escape_char; | |
704b1659 | 735 | arg = strdelim(&s); |
089fbbd2 | 736 | if (!arg || *arg == '\0') |
5260325f | 737 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 738 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 739 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
740 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 741 | else if (strlen(arg) == 1) |
1e3b8b07 | 742 | value = (u_char) arg[0]; |
089fbbd2 | 743 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 744 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 745 | else { |
746 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 747 | filename, linenum); |
5260325f | 748 | /* NOTREACHED */ |
749 | value = 0; /* Avoid compiler warning. */ | |
750 | } | |
751 | if (*activep && *intptr == -1) | |
752 | *intptr = value; | |
753 | break; | |
754 | ||
f811e52a | 755 | case oAddressFamily: |
756 | arg = strdelim(&s); | |
38634ff6 | 757 | if (!arg || *arg == '\0') |
758 | fatal("%s line %d: missing address family.", | |
759 | filename, linenum); | |
1572b90f | 760 | intptr = &options->address_family; |
f811e52a | 761 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 762 | value = AF_INET; |
f811e52a | 763 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 764 | value = AF_INET6; |
f811e52a | 765 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 766 | value = AF_UNSPEC; |
f811e52a | 767 | else |
768 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 769 | if (*activep && *intptr == -1) |
770 | *intptr = value; | |
f811e52a | 771 | break; |
772 | ||
cc46e2ee | 773 | case oEnableSSHKeysign: |
774 | intptr = &options->enable_ssh_keysign; | |
775 | goto parse_flag; | |
776 | ||
3a065ed0 | 777 | case oIdentitiesOnly: |
778 | intptr = &options->identities_only; | |
779 | goto parse_flag; | |
780 | ||
5d8d32a3 | 781 | case oServerAliveInterval: |
782 | intptr = &options->server_alive_interval; | |
783 | goto parse_time; | |
784 | ||
785 | case oServerAliveCountMax: | |
786 | intptr = &options->server_alive_count_max; | |
787 | goto parse_int; | |
788 | ||
61a2c1da | 789 | case oSendEnv: |
790 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
791 | if (strchr(arg, '=') != NULL) | |
792 | fatal("%s line %d: Invalid environment name.", | |
793 | filename, linenum); | |
c8c99dd5 | 794 | if (!*activep) |
795 | continue; | |
61a2c1da | 796 | if (options->num_send_env >= MAX_SEND_ENV) |
797 | fatal("%s line %d: too many send env.", | |
798 | filename, linenum); | |
799 | options->send_env[options->num_send_env++] = | |
800 | xstrdup(arg); | |
801 | } | |
802 | break; | |
803 | ||
5e96b616 | 804 | case oControlPath: |
805 | charptr = &options->control_path; | |
806 | goto parse_string; | |
807 | ||
808 | case oControlMaster: | |
809 | intptr = &options->control_master; | |
9dfd96d6 | 810 | arg = strdelim(&s); |
811 | if (!arg || *arg == '\0') | |
812 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
813 | filename, linenum); | |
814 | value = 0; /* To avoid compiler warning... */ | |
815 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
816 | value = SSHCTL_MASTER_YES; | |
817 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
818 | value = SSHCTL_MASTER_NO; | |
819 | else if (strcmp(arg, "auto") == 0) | |
820 | value = SSHCTL_MASTER_AUTO; | |
821 | else if (strcmp(arg, "ask") == 0) | |
822 | value = SSHCTL_MASTER_ASK; | |
823 | else if (strcmp(arg, "autoask") == 0) | |
824 | value = SSHCTL_MASTER_AUTO_ASK; | |
825 | else | |
826 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
827 | filename, linenum); | |
828 | if (*activep && *intptr == -1) | |
829 | *intptr = value; | |
830 | break; | |
5e96b616 | 831 | |
5c63c2ab | 832 | case oHashKnownHosts: |
833 | intptr = &options->hash_known_hosts; | |
834 | goto parse_flag; | |
835 | ||
d20f3c9e | 836 | case oTunnel: |
837 | intptr = &options->tun_open; | |
838 | goto parse_flag; | |
839 | ||
840 | case oTunnelDevice: | |
841 | arg = strdelim(&s); | |
842 | if (!arg || *arg == '\0') | |
843 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
844 | value = a2tun(arg, &value2); | |
845 | if (value < -1) | |
846 | fatal("%.200s line %d: Bad tun device.", filename, linenum); | |
847 | if (*activep) { | |
848 | options->tun_local = value; | |
849 | options->tun_remote = value2; | |
850 | } | |
851 | break; | |
852 | ||
853 | case oLocalCommand: | |
854 | charptr = &options->local_command; | |
855 | goto parse_command; | |
856 | ||
857 | case oPermitLocalCommand: | |
858 | intptr = &options->permit_local_command; | |
859 | goto parse_flag; | |
860 | ||
80fcb74e | 861 | case oDeprecated: |
4feae93d | 862 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 863 | filename, linenum, keyword); |
4feae93d | 864 | return 0; |
80fcb74e | 865 | |
a2144546 | 866 | case oUnsupported: |
867 | error("%s line %d: Unsupported option \"%s\"", | |
868 | filename, linenum, keyword); | |
869 | return 0; | |
870 | ||
5260325f | 871 | default: |
872 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
873 | } | |
874 | ||
875 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 876 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 877 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
4e2e5cfd | 878 | filename, linenum, arg); |
089fbbd2 | 879 | } |
5260325f | 880 | return 0; |
8efc0c15 | 881 | } |
882 | ||
883 | ||
aa3378df | 884 | /* |
885 | * Reads the config file and modifies the options accordingly. Options | |
886 | * should already be initialized before this call. This never returns if | |
93111dfa | 887 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 888 | */ |
8efc0c15 | 889 | |
93111dfa | 890 | int |
f2107e97 | 891 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 892 | int checkperm) |
8efc0c15 | 893 | { |
5260325f | 894 | FILE *f; |
895 | char line[1024]; | |
896 | int active, linenum; | |
897 | int bad_options = 0; | |
898 | ||
899 | /* Open the file. */ | |
9f6cab4b | 900 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 901 | return 0; |
5260325f | 902 | |
9f6cab4b | 903 | if (checkperm) { |
904 | struct stat sb; | |
f2107e97 | 905 | |
f9ee425b | 906 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 907 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 908 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 909 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 910 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 911 | } |
912 | ||
5260325f | 913 | debug("Reading configuration data %.200s", filename); |
914 | ||
aa3378df | 915 | /* |
916 | * Mark that we are now processing the options. This flag is turned | |
917 | * on/off by Host specifications. | |
918 | */ | |
5260325f | 919 | active = 1; |
920 | linenum = 0; | |
921 | while (fgets(line, sizeof(line), f)) { | |
922 | /* Update line number counter. */ | |
923 | linenum++; | |
924 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
925 | bad_options++; | |
926 | } | |
927 | fclose(f); | |
928 | if (bad_options > 0) | |
54b974dc | 929 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 930 | filename, bad_options); |
93111dfa | 931 | return 1; |
8efc0c15 | 932 | } |
933 | ||
aa3378df | 934 | /* |
935 | * Initializes options to special values that indicate that they have not yet | |
936 | * been set. Read_config_file will only set options with this value. Options | |
937 | * are processed in the following order: command line, user config file, | |
938 | * system config file. Last, fill_default_options is called. | |
939 | */ | |
8efc0c15 | 940 | |
6ae2364d | 941 | void |
5260325f | 942 | initialize_options(Options * options) |
8efc0c15 | 943 | { |
5260325f | 944 | memset(options, 'X', sizeof(*options)); |
945 | options->forward_agent = -1; | |
946 | options->forward_x11 = -1; | |
d73a67d7 | 947 | options->forward_x11_trusted = -1; |
fa649821 | 948 | options->xauth_location = NULL; |
5260325f | 949 | options->gateway_ports = -1; |
950 | options->use_privileged_port = -1; | |
5260325f | 951 | options->rsa_authentication = -1; |
fa08c86b | 952 | options->pubkey_authentication = -1; |
5ba55ada | 953 | options->challenge_response_authentication = -1; |
7364bd04 | 954 | options->gss_authentication = -1; |
955 | options->gss_deleg_creds = -1; | |
5260325f | 956 | options->password_authentication = -1; |
94ec8c6b | 957 | options->kbd_interactive_authentication = -1; |
958 | options->kbd_interactive_devices = NULL; | |
5260325f | 959 | options->rhosts_rsa_authentication = -1; |
8002af61 | 960 | options->hostbased_authentication = -1; |
5260325f | 961 | options->batch_mode = -1; |
962 | options->check_host_ip = -1; | |
963 | options->strict_host_key_checking = -1; | |
964 | options->compression = -1; | |
fd573618 | 965 | options->tcp_keep_alive = -1; |
5260325f | 966 | options->compression_level = -1; |
967 | options->port = -1; | |
1572b90f | 968 | options->address_family = -1; |
5260325f | 969 | options->connection_attempts = -1; |
09ab3296 | 970 | options->connection_timeout = -1; |
5260325f | 971 | options->number_of_password_prompts = -1; |
972 | options->cipher = -1; | |
a8be9f80 | 973 | options->ciphers = NULL; |
b2552997 | 974 | options->macs = NULL; |
e961a8f9 | 975 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 976 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 977 | options->num_identity_files = 0; |
978 | options->hostname = NULL; | |
8abcdba4 | 979 | options->host_key_alias = NULL; |
5260325f | 980 | options->proxy_command = NULL; |
981 | options->user = NULL; | |
982 | options->escape_char = -1; | |
983 | options->system_hostfile = NULL; | |
984 | options->user_hostfile = NULL; | |
a306f2dd | 985 | options->system_hostfile2 = NULL; |
986 | options->user_hostfile2 = NULL; | |
5260325f | 987 | options->num_local_forwards = 0; |
988 | options->num_remote_forwards = 0; | |
e1c5bfaf | 989 | options->clear_forwardings = -1; |
5eaf8578 | 990 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 991 | options->preferred_authentications = NULL; |
3435f5a6 | 992 | options->bind_address = NULL; |
9ff6f66f | 993 | options->smartcard_device = NULL; |
cc46e2ee | 994 | options->enable_ssh_keysign = - 1; |
8bbc048a | 995 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 996 | options->identities_only = - 1; |
ffd7b36b | 997 | options->rekey_limit = - 1; |
21289cd0 | 998 | options->verify_host_key_dns = -1; |
5d8d32a3 | 999 | options->server_alive_interval = -1; |
1000 | options->server_alive_count_max = -1; | |
61a2c1da | 1001 | options->num_send_env = 0; |
5e96b616 | 1002 | options->control_path = NULL; |
1003 | options->control_master = -1; | |
5c63c2ab | 1004 | options->hash_known_hosts = -1; |
d20f3c9e | 1005 | options->tun_open = -1; |
1006 | options->tun_local = -1; | |
1007 | options->tun_remote = -1; | |
1008 | options->local_command = NULL; | |
1009 | options->permit_local_command = -1; | |
8efc0c15 | 1010 | } |
1011 | ||
aa3378df | 1012 | /* |
1013 | * Called after processing other sources of option data, this fills those | |
1014 | * options for which no value has been specified with their default values. | |
1015 | */ | |
8efc0c15 | 1016 | |
6ae2364d | 1017 | void |
5260325f | 1018 | fill_default_options(Options * options) |
8efc0c15 | 1019 | { |
d2c46e77 | 1020 | int len; |
1021 | ||
5260325f | 1022 | if (options->forward_agent == -1) |
71276795 | 1023 | options->forward_agent = 0; |
5260325f | 1024 | if (options->forward_x11 == -1) |
c8d54615 | 1025 | options->forward_x11 = 0; |
d73a67d7 | 1026 | if (options->forward_x11_trusted == -1) |
1027 | options->forward_x11_trusted = 0; | |
fa649821 | 1028 | if (options->xauth_location == NULL) |
fd9ede94 | 1029 | options->xauth_location = _PATH_XAUTH; |
5260325f | 1030 | if (options->gateway_ports == -1) |
1031 | options->gateway_ports = 0; | |
1032 | if (options->use_privileged_port == -1) | |
d5ebca2b | 1033 | options->use_privileged_port = 0; |
5260325f | 1034 | if (options->rsa_authentication == -1) |
1035 | options->rsa_authentication = 1; | |
fa08c86b | 1036 | if (options->pubkey_authentication == -1) |
1037 | options->pubkey_authentication = 1; | |
5ba55ada | 1038 | if (options->challenge_response_authentication == -1) |
10a2cbef | 1039 | options->challenge_response_authentication = 1; |
7364bd04 | 1040 | if (options->gss_authentication == -1) |
2ecb78df | 1041 | options->gss_authentication = 0; |
7364bd04 | 1042 | if (options->gss_deleg_creds == -1) |
1043 | options->gss_deleg_creds = 0; | |
5260325f | 1044 | if (options->password_authentication == -1) |
1045 | options->password_authentication = 1; | |
94ec8c6b | 1046 | if (options->kbd_interactive_authentication == -1) |
d464095c | 1047 | options->kbd_interactive_authentication = 1; |
5260325f | 1048 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 1049 | options->rhosts_rsa_authentication = 0; |
8002af61 | 1050 | if (options->hostbased_authentication == -1) |
1051 | options->hostbased_authentication = 0; | |
5260325f | 1052 | if (options->batch_mode == -1) |
1053 | options->batch_mode = 0; | |
1054 | if (options->check_host_ip == -1) | |
1055 | options->check_host_ip = 1; | |
1056 | if (options->strict_host_key_checking == -1) | |
1057 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1058 | if (options->compression == -1) | |
1059 | options->compression = 0; | |
fd573618 | 1060 | if (options->tcp_keep_alive == -1) |
1061 | options->tcp_keep_alive = 1; | |
5260325f | 1062 | if (options->compression_level == -1) |
1063 | options->compression_level = 6; | |
1064 | if (options->port == -1) | |
1065 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1066 | if (options->address_family == -1) |
1067 | options->address_family = AF_UNSPEC; | |
5260325f | 1068 | if (options->connection_attempts == -1) |
ce773142 | 1069 | options->connection_attempts = 1; |
5260325f | 1070 | if (options->number_of_password_prompts == -1) |
1071 | options->number_of_password_prompts = 3; | |
1072 | /* Selected in ssh_login(). */ | |
1073 | if (options->cipher == -1) | |
1074 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1075 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1076 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1077 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1078 | if (options->protocol == SSH_PROTO_UNKNOWN) |
3e587cc3 | 1079 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
5260325f | 1080 | if (options->num_identity_files == 0) { |
fa08c86b | 1081 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1082 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1083 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1084 | xmalloc(len); |
1085 | snprintf(options->identity_files[options->num_identity_files++], | |
1086 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1087 | } |
1088 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1089 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1090 | options->identity_files[options->num_identity_files] = | |
1091 | xmalloc(len); | |
1092 | snprintf(options->identity_files[options->num_identity_files++], | |
1093 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1094 | ||
d2c46e77 | 1095 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1096 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1097 | xmalloc(len); |
1098 | snprintf(options->identity_files[options->num_identity_files++], | |
1099 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1100 | } |
a306f2dd | 1101 | } |
5260325f | 1102 | if (options->escape_char == -1) |
1103 | options->escape_char = '~'; | |
1104 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1105 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1106 | if (options->user_hostfile == NULL) |
42f11eb2 | 1107 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1108 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1109 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1110 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1111 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1112 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1113 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1114 | if (options->clear_forwardings == 1) |
1115 | clear_forwardings(options); | |
8bbc048a | 1116 | if (options->no_host_authentication_for_localhost == - 1) |
1117 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1118 | if (options->identities_only == -1) |
1119 | options->identities_only = 0; | |
cc46e2ee | 1120 | if (options->enable_ssh_keysign == -1) |
1121 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1122 | if (options->rekey_limit == -1) |
1123 | options->rekey_limit = 0; | |
21289cd0 | 1124 | if (options->verify_host_key_dns == -1) |
1125 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1126 | if (options->server_alive_interval == -1) |
1127 | options->server_alive_interval = 0; | |
1128 | if (options->server_alive_count_max == -1) | |
1129 | options->server_alive_count_max = 3; | |
5e96b616 | 1130 | if (options->control_master == -1) |
1131 | options->control_master = 0; | |
5c63c2ab | 1132 | if (options->hash_known_hosts == -1) |
1133 | options->hash_known_hosts = 0; | |
d20f3c9e | 1134 | if (options->tun_open == -1) |
1135 | options->tun_open = 0; | |
1136 | if (options->permit_local_command == -1) | |
1137 | options->permit_local_command = 0; | |
1138 | /* options->local_command should not be set by default */ | |
5260325f | 1139 | /* options->proxy_command should not be set by default */ |
1140 | /* options->user will be set in the main program if appropriate */ | |
1141 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1142 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1143 | /* options->preferred_authentications will be set in ssh */ |
8efc0c15 | 1144 | } |
3867aa0a | 1145 | |
1146 | /* | |
1147 | * parse_forward | |
1148 | * parses a string containing a port forwarding specification of the form: | |
1149 | * [listenhost:]listenport:connecthost:connectport | |
1150 | * returns number of arguments parsed or zero on error | |
1151 | */ | |
1152 | int | |
1153 | parse_forward(Forward *fwd, const char *fwdspec) | |
1154 | { | |
1155 | int i; | |
1156 | char *p, *cp, *fwdarg[4]; | |
1157 | ||
1158 | memset(fwd, '\0', sizeof(*fwd)); | |
1159 | ||
1160 | cp = p = xstrdup(fwdspec); | |
1161 | ||
1162 | /* skip leading spaces */ | |
1163 | while (*cp && isspace(*cp)) | |
1164 | cp++; | |
1165 | ||
1166 | for (i = 0; i < 4; ++i) | |
1167 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1168 | break; | |
1169 | ||
1170 | /* Check for trailing garbage in 4-arg case*/ | |
1171 | if (cp != NULL) | |
1172 | i = 0; /* failure */ | |
1173 | ||
1174 | switch (i) { | |
1175 | case 3: | |
1176 | fwd->listen_host = NULL; | |
1177 | fwd->listen_port = a2port(fwdarg[0]); | |
1178 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1179 | fwd->connect_port = a2port(fwdarg[2]); | |
1180 | break; | |
1181 | ||
1182 | case 4: | |
1183 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1184 | fwd->listen_port = a2port(fwdarg[1]); | |
1185 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1186 | fwd->connect_port = a2port(fwdarg[3]); | |
1187 | break; | |
1188 | default: | |
1189 | i = 0; /* failure */ | |
1190 | } | |
1191 | ||
1192 | xfree(p); | |
1193 | ||
1194 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1195 | goto fail_free; | |
1196 | ||
1197 | if (fwd->connect_host != NULL && | |
1198 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1199 | goto fail_free; | |
1200 | ||
1201 | return (i); | |
1202 | ||
1203 | fail_free: | |
1204 | if (fwd->connect_host != NULL) | |
1205 | xfree(fwd->connect_host); | |
1206 | if (fwd->listen_host != NULL) | |
1207 | xfree(fwd->listen_host); | |
1208 | return (0); | |
1209 | } |