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c1cb7bae | 1 | /* $OpenBSD: readconf.c,v 1.151 2006/03/25 13:17:02 djm 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> | |
8efc0c15 | 19 | |
b6438382 | 20 | #include <ctype.h> |
21 | ||
8efc0c15 | 22 | #include "ssh.h" |
8efc0c15 | 23 | #include "xmalloc.h" |
a8be9f80 | 24 | #include "compat.h" |
42f11eb2 | 25 | #include "cipher.h" |
26 | #include "pathnames.h" | |
27 | #include "log.h" | |
28 | #include "readconf.h" | |
29 | #include "match.h" | |
30 | #include "misc.h" | |
b2552997 | 31 | #include "kex.h" |
32 | #include "mac.h" | |
8efc0c15 | 33 | |
34 | /* Format of the configuration file: | |
35 | ||
36 | # Configuration data is parsed as follows: | |
37 | # 1. command line options | |
38 | # 2. user-specific file | |
39 | # 3. system-wide file | |
40 | # Any configuration value is only changed the first time it is set. | |
41 | # Thus, host-specific definitions should be at the beginning of the | |
42 | # configuration file, and defaults at the end. | |
43 | ||
44 | # Host-specific declarations. These may override anything above. A single | |
45 | # host may match multiple declarations; these are processed in the order | |
46 | # that they are given in. | |
47 | ||
48 | Host *.ngs.fi ngs.fi | |
80fcb74e | 49 | User foo |
8efc0c15 | 50 | |
51 | Host fake.com | |
52 | HostName another.host.name.real.org | |
53 | User blaah | |
54 | Port 34289 | |
55 | ForwardX11 no | |
56 | ForwardAgent no | |
57 | ||
58 | Host books.com | |
59 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
60 | Cipher 3des | |
61 | ||
62 | Host fascist.blob.com | |
63 | Port 23123 | |
64 | User tylonen | |
8efc0c15 | 65 | PasswordAuthentication no |
66 | ||
67 | Host puukko.hut.fi | |
68 | User t35124p | |
69 | ProxyCommand ssh-proxy %h %p | |
70 | ||
71 | Host *.fr | |
80fcb74e | 72 | PublicKeyAuthentication no |
8efc0c15 | 73 | |
74 | Host *.su | |
75 | Cipher none | |
76 | PasswordAuthentication no | |
77 | ||
d20f3c9e | 78 | Host vpn.fake.com |
79 | Tunnel yes | |
80 | TunnelDevice 3 | |
81 | ||
8efc0c15 | 82 | # Defaults for various options |
83 | Host * | |
84 | ForwardAgent no | |
fa08c86b | 85 | ForwardX11 no |
8efc0c15 | 86 | PasswordAuthentication yes |
87 | RSAAuthentication yes | |
88 | RhostsRSAAuthentication yes | |
8efc0c15 | 89 | StrictHostKeyChecking yes |
fd573618 | 90 | TcpKeepAlive no |
8efc0c15 | 91 | IdentityFile ~/.ssh/identity |
92 | Port 22 | |
93 | EscapeChar ~ | |
94 | ||
95 | */ | |
96 | ||
97 | /* Keyword tokens. */ | |
98 | ||
5260325f | 99 | typedef enum { |
100 | oBadOption, | |
d73a67d7 | 101 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
7203d6bb | 102 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 103 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 104 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
105 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
106 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
107 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 108 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 109 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 110 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 111 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 112 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 113 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 114 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 115 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 116 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 117 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 118 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
d20f3c9e | 119 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
a2144546 | 120 | oDeprecated, oUnsupported |
8efc0c15 | 121 | } OpCodes; |
122 | ||
123 | /* Textual representations of the tokens. */ | |
124 | ||
5260325f | 125 | static struct { |
126 | const char *name; | |
127 | OpCodes opcode; | |
128 | } keywords[] = { | |
129 | { "forwardagent", oForwardAgent }, | |
130 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 131 | { "forwardx11trusted", oForwardX11Trusted }, |
fa649821 | 132 | { "xauthlocation", oXAuthLocation }, |
5260325f | 133 | { "gatewayports", oGatewayPorts }, |
134 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 135 | { "rhostsauthentication", oDeprecated }, |
5260325f | 136 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 137 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
138 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 139 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 140 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 141 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 142 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 143 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 144 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
145 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
146 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 147 | { "kerberosauthentication", oUnsupported }, |
148 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 149 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 150 | #if defined(GSSAPI) |
151 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 152 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
153 | #else | |
154 | { "gssapiauthentication", oUnsupported }, | |
155 | { "gssapidelegatecredentials", oUnsupported }, | |
156 | #endif | |
80fcb74e | 157 | { "fallbacktorsh", oDeprecated }, |
158 | { "usersh", oDeprecated }, | |
5260325f | 159 | { "identityfile", oIdentityFile }, |
fa08c86b | 160 | { "identityfile2", oIdentityFile }, /* alias */ |
3a065ed0 | 161 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 162 | { "hostname", oHostName }, |
8abcdba4 | 163 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 164 | { "proxycommand", oProxyCommand }, |
165 | { "port", oPort }, | |
166 | { "cipher", oCipher }, | |
a8be9f80 | 167 | { "ciphers", oCiphers }, |
b2552997 | 168 | { "macs", oMacs }, |
a8be9f80 | 169 | { "protocol", oProtocol }, |
5260325f | 170 | { "remoteforward", oRemoteForward }, |
171 | { "localforward", oLocalForward }, | |
172 | { "user", oUser }, | |
173 | { "host", oHost }, | |
174 | { "escapechar", oEscapeChar }, | |
5260325f | 175 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
f49bc4f7 | 176 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ |
a306f2dd | 177 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, |
f49bc4f7 | 178 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 179 | { "connectionattempts", oConnectionAttempts }, |
180 | { "batchmode", oBatchMode }, | |
181 | { "checkhostip", oCheckHostIP }, | |
182 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
183 | { "compression", oCompression }, | |
184 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 185 | { "tcpkeepalive", oTCPKeepAlive }, |
186 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 187 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 188 | { "loglevel", oLogLevel }, |
0490e609 | 189 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 190 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 191 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 192 | { "bindaddress", oBindAddress }, |
a2144546 | 193 | #ifdef SMARTCARD |
eea098a3 | 194 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 195 | #else |
196 | { "smartcarddevice", oUnsupported }, | |
197 | #endif | |
184eed6a | 198 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 199 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 200 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 201 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 202 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 203 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 204 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 205 | { "serveraliveinterval", oServerAliveInterval }, |
206 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 207 | { "sendenv", oSendEnv }, |
5e96b616 | 208 | { "controlpath", oControlPath }, |
209 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 210 | { "hashknownhosts", oHashKnownHosts }, |
d20f3c9e | 211 | { "tunnel", oTunnel }, |
212 | { "tunneldevice", oTunnelDevice }, | |
213 | { "localcommand", oLocalCommand }, | |
214 | { "permitlocalcommand", oPermitLocalCommand }, | |
17a3011c | 215 | { NULL, oBadOption } |
6a17f9c2 | 216 | }; |
217 | ||
aa3378df | 218 | /* |
219 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
220 | * error. | |
221 | */ | |
8efc0c15 | 222 | |
6ae2364d | 223 | void |
3867aa0a | 224 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 225 | { |
5260325f | 226 | Forward *fwd; |
e6f15ed1 | 227 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 228 | extern uid_t original_real_uid; |
3867aa0a | 229 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 230 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 231 | #endif |
5260325f | 232 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
233 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
234 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 235 | |
236 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
237 | NULL : xstrdup(newfwd->listen_host); | |
238 | fwd->listen_port = newfwd->listen_port; | |
239 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
240 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 241 | } |
242 | ||
aa3378df | 243 | /* |
244 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
245 | * an error. | |
246 | */ | |
8efc0c15 | 247 | |
6ae2364d | 248 | void |
3867aa0a | 249 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 250 | { |
5260325f | 251 | Forward *fwd; |
252 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
253 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 254 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 255 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
3867aa0a | 256 | |
257 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
258 | NULL : xstrdup(newfwd->listen_host); | |
259 | fwd->listen_port = newfwd->listen_port; | |
260 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
261 | fwd->connect_port = newfwd->connect_port; | |
8efc0c15 | 262 | } |
263 | ||
e1c5bfaf | 264 | static void |
265 | clear_forwardings(Options *options) | |
266 | { | |
267 | int i; | |
268 | ||
3867aa0a | 269 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 270 | if (options->local_forwards[i].listen_host != NULL) |
271 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 272 | xfree(options->local_forwards[i].connect_host); |
273 | } | |
e1c5bfaf | 274 | options->num_local_forwards = 0; |
3867aa0a | 275 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 276 | if (options->remote_forwards[i].listen_host != NULL) |
277 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 278 | xfree(options->remote_forwards[i].connect_host); |
279 | } | |
e1c5bfaf | 280 | options->num_remote_forwards = 0; |
a4f24bf8 | 281 | options->tun_open = SSH_TUNMODE_NO; |
e1c5bfaf | 282 | } |
283 | ||
aa3378df | 284 | /* |
6be9a5e8 | 285 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 286 | */ |
8efc0c15 | 287 | |
6ae2364d | 288 | static OpCodes |
5260325f | 289 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 290 | { |
1e3b8b07 | 291 | u_int i; |
8efc0c15 | 292 | |
5260325f | 293 | for (i = 0; keywords[i].name; i++) |
aa3378df | 294 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 295 | return keywords[i].opcode; |
8efc0c15 | 296 | |
b7c70970 | 297 | error("%s: line %d: Bad configuration option: %s", |
298 | filename, linenum, cp); | |
5260325f | 299 | return oBadOption; |
8efc0c15 | 300 | } |
301 | ||
aa3378df | 302 | /* |
303 | * Processes a single option line as used in the configuration files. This | |
304 | * only sets those values that have not already been set. | |
305 | */ | |
d718e75d | 306 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 307 | |
e7c0f9d5 | 308 | int |
309 | process_config_line(Options *options, const char *host, | |
5260325f | 310 | char *line, const char *filename, int linenum, |
311 | int *activep) | |
8efc0c15 | 312 | { |
3867aa0a | 313 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
129d5252 | 314 | int opcode, *intptr, value, value2, scale; |
315 | long long orig, val64; | |
d718e75d | 316 | size_t len; |
3867aa0a | 317 | Forward fwd; |
5260325f | 318 | |
204fde99 | 319 | /* Strip trailing whitespace */ |
f8cc7664 | 320 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 321 | if (strchr(WHITESPACE, line[len]) == NULL) |
322 | break; | |
323 | line[len] = '\0'; | |
324 | } | |
325 | ||
704b1659 | 326 | s = line; |
327 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
88299971 | 328 | if ((keyword = strdelim(&s)) == NULL) |
329 | return 0; | |
704b1659 | 330 | /* Ignore leading whitespace. */ |
331 | if (*keyword == '\0') | |
332 | keyword = strdelim(&s); | |
42f11eb2 | 333 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 334 | return 0; |
335 | ||
089fbbd2 | 336 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 337 | |
338 | switch (opcode) { | |
339 | case oBadOption: | |
aa3378df | 340 | /* don't panic, but count bad options */ |
341 | return -1; | |
5260325f | 342 | /* NOTREACHED */ |
09ab3296 | 343 | case oConnectTimeout: |
344 | intptr = &options->connection_timeout; | |
5d8d32a3 | 345 | parse_time: |
09ab3296 | 346 | arg = strdelim(&s); |
347 | if (!arg || *arg == '\0') | |
348 | fatal("%s line %d: missing time value.", | |
349 | filename, linenum); | |
350 | if ((value = convtime(arg)) == -1) | |
351 | fatal("%s line %d: invalid time value.", | |
352 | filename, linenum); | |
353 | if (*intptr == -1) | |
354 | *intptr = value; | |
355 | break; | |
356 | ||
5260325f | 357 | case oForwardAgent: |
358 | intptr = &options->forward_agent; | |
359 | parse_flag: | |
704b1659 | 360 | arg = strdelim(&s); |
089fbbd2 | 361 | if (!arg || *arg == '\0') |
5260325f | 362 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
363 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 364 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 365 | value = 1; |
089fbbd2 | 366 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 367 | value = 0; |
368 | else | |
369 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
370 | if (*activep && *intptr == -1) | |
371 | *intptr = value; | |
372 | break; | |
373 | ||
374 | case oForwardX11: | |
375 | intptr = &options->forward_x11; | |
376 | goto parse_flag; | |
377 | ||
d73a67d7 | 378 | case oForwardX11Trusted: |
379 | intptr = &options->forward_x11_trusted; | |
380 | goto parse_flag; | |
381 | ||
5260325f | 382 | case oGatewayPorts: |
383 | intptr = &options->gateway_ports; | |
384 | goto parse_flag; | |
385 | ||
386 | case oUsePrivilegedPort: | |
387 | intptr = &options->use_privileged_port; | |
388 | goto parse_flag; | |
389 | ||
5260325f | 390 | case oPasswordAuthentication: |
391 | intptr = &options->password_authentication; | |
392 | goto parse_flag; | |
393 | ||
94ec8c6b | 394 | case oKbdInteractiveAuthentication: |
395 | intptr = &options->kbd_interactive_authentication; | |
396 | goto parse_flag; | |
397 | ||
398 | case oKbdInteractiveDevices: | |
399 | charptr = &options->kbd_interactive_devices; | |
400 | goto parse_string; | |
401 | ||
fa08c86b | 402 | case oPubkeyAuthentication: |
403 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 404 | goto parse_flag; |
405 | ||
5260325f | 406 | case oRSAAuthentication: |
407 | intptr = &options->rsa_authentication; | |
408 | goto parse_flag; | |
409 | ||
410 | case oRhostsRSAAuthentication: | |
411 | intptr = &options->rhosts_rsa_authentication; | |
412 | goto parse_flag; | |
413 | ||
8002af61 | 414 | case oHostbasedAuthentication: |
415 | intptr = &options->hostbased_authentication; | |
416 | goto parse_flag; | |
417 | ||
d464095c | 418 | case oChallengeResponseAuthentication: |
5ba55ada | 419 | intptr = &options->challenge_response_authentication; |
5260325f | 420 | goto parse_flag; |
d0ec7f42 | 421 | |
7364bd04 | 422 | case oGssAuthentication: |
423 | intptr = &options->gss_authentication; | |
424 | goto parse_flag; | |
425 | ||
426 | case oGssDelegateCreds: | |
427 | intptr = &options->gss_deleg_creds; | |
428 | goto parse_flag; | |
429 | ||
5260325f | 430 | case oBatchMode: |
431 | intptr = &options->batch_mode; | |
432 | goto parse_flag; | |
433 | ||
434 | case oCheckHostIP: | |
435 | intptr = &options->check_host_ip; | |
436 | goto parse_flag; | |
437 | ||
21289cd0 | 438 | case oVerifyHostKeyDNS: |
439 | intptr = &options->verify_host_key_dns; | |
0161a13d | 440 | goto parse_yesnoask; |
21289cd0 | 441 | |
5260325f | 442 | case oStrictHostKeyChecking: |
443 | intptr = &options->strict_host_key_checking; | |
0161a13d | 444 | parse_yesnoask: |
704b1659 | 445 | arg = strdelim(&s); |
089fbbd2 | 446 | if (!arg || *arg == '\0') |
c76c8819 | 447 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 448 | filename, linenum); |
5260325f | 449 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 450 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 451 | value = 1; |
089fbbd2 | 452 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 453 | value = 0; |
089fbbd2 | 454 | else if (strcmp(arg, "ask") == 0) |
5260325f | 455 | value = 2; |
456 | else | |
457 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
458 | if (*activep && *intptr == -1) | |
459 | *intptr = value; | |
460 | break; | |
461 | ||
462 | case oCompression: | |
463 | intptr = &options->compression; | |
464 | goto parse_flag; | |
465 | ||
fd573618 | 466 | case oTCPKeepAlive: |
467 | intptr = &options->tcp_keep_alive; | |
5260325f | 468 | goto parse_flag; |
469 | ||
8bbc048a | 470 | case oNoHostAuthenticationForLocalhost: |
471 | intptr = &options->no_host_authentication_for_localhost; | |
472 | goto parse_flag; | |
473 | ||
5260325f | 474 | case oNumberOfPasswordPrompts: |
475 | intptr = &options->number_of_password_prompts; | |
476 | goto parse_int; | |
477 | ||
478 | case oCompressionLevel: | |
479 | intptr = &options->compression_level; | |
480 | goto parse_int; | |
481 | ||
ffd7b36b | 482 | case oRekeyLimit: |
483 | intptr = &options->rekey_limit; | |
484 | arg = strdelim(&s); | |
485 | if (!arg || *arg == '\0') | |
486 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
487 | if (arg[0] < '0' || arg[0] > '9') | |
488 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
129d5252 | 489 | orig = val64 = strtoll(arg, &endofnumber, 10); |
ffd7b36b | 490 | if (arg == endofnumber) |
491 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
492 | switch (toupper(*endofnumber)) { | |
129d5252 | 493 | case '\0': |
494 | scale = 1; | |
495 | break; | |
ffd7b36b | 496 | case 'K': |
129d5252 | 497 | scale = 1<<10; |
ffd7b36b | 498 | break; |
499 | case 'M': | |
129d5252 | 500 | scale = 1<<20; |
ffd7b36b | 501 | break; |
502 | case 'G': | |
129d5252 | 503 | scale = 1<<30; |
ffd7b36b | 504 | break; |
129d5252 | 505 | default: |
506 | fatal("%.200s line %d: Invalid RekeyLimit suffix", | |
507 | filename, linenum); | |
ffd7b36b | 508 | } |
129d5252 | 509 | val64 *= scale; |
510 | /* detect integer wrap and too-large limits */ | |
511 | if ((val64 / scale) != orig || val64 > INT_MAX) | |
512 | fatal("%.200s line %d: RekeyLimit too large", | |
513 | filename, linenum); | |
514 | if (val64 < 16) | |
515 | fatal("%.200s line %d: RekeyLimit too small", | |
516 | filename, linenum); | |
ffd7b36b | 517 | if (*activep && *intptr == -1) |
129d5252 | 518 | *intptr = (int)val64; |
ffd7b36b | 519 | break; |
520 | ||
5260325f | 521 | case oIdentityFile: |
704b1659 | 522 | arg = strdelim(&s); |
089fbbd2 | 523 | if (!arg || *arg == '\0') |
5260325f | 524 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
525 | if (*activep) { | |
fa08c86b | 526 | intptr = &options->num_identity_files; |
a306f2dd | 527 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 528 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 529 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
fa08c86b | 530 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 531 | *charptr = xstrdup(arg); |
a306f2dd | 532 | *intptr = *intptr + 1; |
5260325f | 533 | } |
534 | break; | |
535 | ||
fa649821 | 536 | case oXAuthLocation: |
537 | charptr=&options->xauth_location; | |
538 | goto parse_string; | |
539 | ||
5260325f | 540 | case oUser: |
541 | charptr = &options->user; | |
542 | parse_string: | |
704b1659 | 543 | arg = strdelim(&s); |
089fbbd2 | 544 | if (!arg || *arg == '\0') |
5260325f | 545 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
546 | if (*activep && *charptr == NULL) | |
089fbbd2 | 547 | *charptr = xstrdup(arg); |
5260325f | 548 | break; |
549 | ||
550 | case oGlobalKnownHostsFile: | |
551 | charptr = &options->system_hostfile; | |
552 | goto parse_string; | |
553 | ||
554 | case oUserKnownHostsFile: | |
555 | charptr = &options->user_hostfile; | |
556 | goto parse_string; | |
557 | ||
a306f2dd | 558 | case oGlobalKnownHostsFile2: |
559 | charptr = &options->system_hostfile2; | |
560 | goto parse_string; | |
561 | ||
562 | case oUserKnownHostsFile2: | |
563 | charptr = &options->user_hostfile2; | |
564 | goto parse_string; | |
565 | ||
5260325f | 566 | case oHostName: |
567 | charptr = &options->hostname; | |
568 | goto parse_string; | |
569 | ||
8abcdba4 | 570 | case oHostKeyAlias: |
571 | charptr = &options->host_key_alias; | |
572 | goto parse_string; | |
573 | ||
cab80f75 | 574 | case oPreferredAuthentications: |
575 | charptr = &options->preferred_authentications; | |
576 | goto parse_string; | |
577 | ||
3435f5a6 | 578 | case oBindAddress: |
579 | charptr = &options->bind_address; | |
580 | goto parse_string; | |
581 | ||
eea098a3 | 582 | case oSmartcardDevice: |
9ff6f66f | 583 | charptr = &options->smartcard_device; |
584 | goto parse_string; | |
eea098a3 | 585 | |
5260325f | 586 | case oProxyCommand: |
d20f3c9e | 587 | charptr = &options->proxy_command; |
588 | parse_command: | |
2d9c1828 | 589 | if (s == NULL) |
590 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
d718e75d | 591 | len = strspn(s, WHITESPACE "="); |
5260325f | 592 | if (*activep && *charptr == NULL) |
d718e75d | 593 | *charptr = xstrdup(s + len); |
5260325f | 594 | return 0; |
595 | ||
596 | case oPort: | |
597 | intptr = &options->port; | |
598 | parse_int: | |
704b1659 | 599 | arg = strdelim(&s); |
089fbbd2 | 600 | if (!arg || *arg == '\0') |
5260325f | 601 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 602 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 603 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 604 | |
605 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 606 | value = strtol(arg, &endofnumber, 0); |
607 | if (arg == endofnumber) | |
aa3378df | 608 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 609 | if (*activep && *intptr == -1) |
610 | *intptr = value; | |
611 | break; | |
612 | ||
613 | case oConnectionAttempts: | |
614 | intptr = &options->connection_attempts; | |
615 | goto parse_int; | |
616 | ||
617 | case oCipher: | |
618 | intptr = &options->cipher; | |
704b1659 | 619 | arg = strdelim(&s); |
089fbbd2 | 620 | if (!arg || *arg == '\0') |
71276795 | 621 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 622 | value = cipher_number(arg); |
5260325f | 623 | if (value == -1) |
624 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 625 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 626 | if (*activep && *intptr == -1) |
627 | *intptr = value; | |
628 | break; | |
629 | ||
a8be9f80 | 630 | case oCiphers: |
704b1659 | 631 | arg = strdelim(&s); |
089fbbd2 | 632 | if (!arg || *arg == '\0') |
71276795 | 633 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 634 | if (!ciphers_valid(arg)) |
d0c832f3 | 635 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 636 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 637 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 638 | options->ciphers = xstrdup(arg); |
a8be9f80 | 639 | break; |
640 | ||
b2552997 | 641 | case oMacs: |
642 | arg = strdelim(&s); | |
643 | if (!arg || *arg == '\0') | |
644 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
645 | if (!mac_valid(arg)) | |
646 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 647 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 648 | if (*activep && options->macs == NULL) |
649 | options->macs = xstrdup(arg); | |
650 | break; | |
651 | ||
e961a8f9 | 652 | case oHostKeyAlgorithms: |
653 | arg = strdelim(&s); | |
654 | if (!arg || *arg == '\0') | |
655 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
656 | if (!key_names_valid2(arg)) | |
657 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 658 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 659 | if (*activep && options->hostkeyalgorithms == NULL) |
660 | options->hostkeyalgorithms = xstrdup(arg); | |
661 | break; | |
662 | ||
a8be9f80 | 663 | case oProtocol: |
664 | intptr = &options->protocol; | |
704b1659 | 665 | arg = strdelim(&s); |
089fbbd2 | 666 | if (!arg || *arg == '\0') |
71276795 | 667 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 668 | value = proto_spec(arg); |
a8be9f80 | 669 | if (value == SSH_PROTO_UNKNOWN) |
670 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 671 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 672 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
673 | *intptr = value; | |
674 | break; | |
675 | ||
5260325f | 676 | case oLogLevel: |
677 | intptr = (int *) &options->log_level; | |
704b1659 | 678 | arg = strdelim(&s); |
089fbbd2 | 679 | value = log_level_number(arg); |
5eaf8578 | 680 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 681 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 682 | filename, linenum, arg ? arg : "<NONE>"); |
5eaf8578 | 683 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) |
5260325f | 684 | *intptr = (LogLevel) value; |
685 | break; | |
686 | ||
5260325f | 687 | case oLocalForward: |
3a8aabf0 | 688 | case oRemoteForward: |
704b1659 | 689 | arg = strdelim(&s); |
3867aa0a | 690 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 691 | fatal("%.200s line %d: Missing port argument.", |
692 | filename, linenum); | |
3867aa0a | 693 | arg2 = strdelim(&s); |
694 | if (arg2 == NULL || *arg2 == '\0') | |
695 | fatal("%.200s line %d: Missing target argument.", | |
3a8aabf0 | 696 | filename, linenum); |
3867aa0a | 697 | |
698 | /* construct a string for parse_forward */ | |
699 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
700 | ||
701 | if (parse_forward(&fwd, fwdarg) == 0) | |
3a8aabf0 | 702 | fatal("%.200s line %d: Bad forwarding specification.", |
703 | filename, linenum); | |
3867aa0a | 704 | |
3a8aabf0 | 705 | if (*activep) { |
706 | if (opcode == oLocalForward) | |
3867aa0a | 707 | add_local_forward(options, &fwd); |
3a8aabf0 | 708 | else if (opcode == oRemoteForward) |
3867aa0a | 709 | add_remote_forward(options, &fwd); |
3a8aabf0 | 710 | } |
5260325f | 711 | break; |
712 | ||
0490e609 | 713 | case oDynamicForward: |
714 | arg = strdelim(&s); | |
715 | if (!arg || *arg == '\0') | |
716 | fatal("%.200s line %d: Missing port argument.", | |
717 | filename, linenum); | |
3867aa0a | 718 | memset(&fwd, '\0', sizeof(fwd)); |
719 | fwd.connect_host = "socks"; | |
720 | fwd.listen_host = hpdelim(&arg); | |
721 | if (fwd.listen_host == NULL || | |
722 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
723 | fatal("%.200s line %d: Bad forwarding specification.", | |
724 | filename, linenum); | |
725 | if (arg) { | |
726 | fwd.listen_port = a2port(arg); | |
727 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
728 | } else { | |
729 | fwd.listen_port = a2port(fwd.listen_host); | |
4c38e9c6 | 730 | fwd.listen_host = NULL; |
3867aa0a | 731 | } |
732 | if (fwd.listen_port == 0) | |
0490e609 | 733 | fatal("%.200s line %d: Badly formatted port number.", |
734 | filename, linenum); | |
14e4a15f | 735 | if (*activep) |
3867aa0a | 736 | add_local_forward(options, &fwd); |
8002af61 | 737 | break; |
0490e609 | 738 | |
e1c5bfaf | 739 | case oClearAllForwardings: |
740 | intptr = &options->clear_forwardings; | |
741 | goto parse_flag; | |
742 | ||
5260325f | 743 | case oHost: |
744 | *activep = 0; | |
704b1659 | 745 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 746 | if (match_pattern(host, arg)) { |
747 | debug("Applying options for %.100s", arg); | |
5260325f | 748 | *activep = 1; |
749 | break; | |
750 | } | |
704b1659 | 751 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 752 | return 0; |
753 | ||
754 | case oEscapeChar: | |
755 | intptr = &options->escape_char; | |
704b1659 | 756 | arg = strdelim(&s); |
089fbbd2 | 757 | if (!arg || *arg == '\0') |
5260325f | 758 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 759 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 760 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
761 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 762 | else if (strlen(arg) == 1) |
1e3b8b07 | 763 | value = (u_char) arg[0]; |
089fbbd2 | 764 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 765 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 766 | else { |
767 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 768 | filename, linenum); |
5260325f | 769 | /* NOTREACHED */ |
770 | value = 0; /* Avoid compiler warning. */ | |
771 | } | |
772 | if (*activep && *intptr == -1) | |
773 | *intptr = value; | |
774 | break; | |
775 | ||
f811e52a | 776 | case oAddressFamily: |
777 | arg = strdelim(&s); | |
38634ff6 | 778 | if (!arg || *arg == '\0') |
779 | fatal("%s line %d: missing address family.", | |
780 | filename, linenum); | |
1572b90f | 781 | intptr = &options->address_family; |
f811e52a | 782 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 783 | value = AF_INET; |
f811e52a | 784 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 785 | value = AF_INET6; |
f811e52a | 786 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 787 | value = AF_UNSPEC; |
f811e52a | 788 | else |
789 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 790 | if (*activep && *intptr == -1) |
791 | *intptr = value; | |
f811e52a | 792 | break; |
793 | ||
cc46e2ee | 794 | case oEnableSSHKeysign: |
795 | intptr = &options->enable_ssh_keysign; | |
796 | goto parse_flag; | |
797 | ||
3a065ed0 | 798 | case oIdentitiesOnly: |
799 | intptr = &options->identities_only; | |
800 | goto parse_flag; | |
801 | ||
5d8d32a3 | 802 | case oServerAliveInterval: |
803 | intptr = &options->server_alive_interval; | |
804 | goto parse_time; | |
805 | ||
806 | case oServerAliveCountMax: | |
807 | intptr = &options->server_alive_count_max; | |
808 | goto parse_int; | |
809 | ||
61a2c1da | 810 | case oSendEnv: |
811 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
812 | if (strchr(arg, '=') != NULL) | |
813 | fatal("%s line %d: Invalid environment name.", | |
814 | filename, linenum); | |
c8c99dd5 | 815 | if (!*activep) |
816 | continue; | |
61a2c1da | 817 | if (options->num_send_env >= MAX_SEND_ENV) |
818 | fatal("%s line %d: too many send env.", | |
819 | filename, linenum); | |
820 | options->send_env[options->num_send_env++] = | |
821 | xstrdup(arg); | |
822 | } | |
823 | break; | |
824 | ||
5e96b616 | 825 | case oControlPath: |
826 | charptr = &options->control_path; | |
827 | goto parse_string; | |
828 | ||
829 | case oControlMaster: | |
830 | intptr = &options->control_master; | |
9dfd96d6 | 831 | arg = strdelim(&s); |
832 | if (!arg || *arg == '\0') | |
833 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
834 | filename, linenum); | |
835 | value = 0; /* To avoid compiler warning... */ | |
836 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
837 | value = SSHCTL_MASTER_YES; | |
838 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
839 | value = SSHCTL_MASTER_NO; | |
840 | else if (strcmp(arg, "auto") == 0) | |
841 | value = SSHCTL_MASTER_AUTO; | |
842 | else if (strcmp(arg, "ask") == 0) | |
843 | value = SSHCTL_MASTER_ASK; | |
844 | else if (strcmp(arg, "autoask") == 0) | |
845 | value = SSHCTL_MASTER_AUTO_ASK; | |
846 | else | |
847 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
848 | filename, linenum); | |
849 | if (*activep && *intptr == -1) | |
850 | *intptr = value; | |
851 | break; | |
5e96b616 | 852 | |
5c63c2ab | 853 | case oHashKnownHosts: |
854 | intptr = &options->hash_known_hosts; | |
855 | goto parse_flag; | |
856 | ||
d20f3c9e | 857 | case oTunnel: |
858 | intptr = &options->tun_open; | |
a4f24bf8 | 859 | arg = strdelim(&s); |
860 | if (!arg || *arg == '\0') | |
861 | fatal("%s line %d: Missing yes/point-to-point/" | |
862 | "ethernet/no argument.", filename, linenum); | |
863 | value = 0; /* silence compiler */ | |
864 | if (strcasecmp(arg, "ethernet") == 0) | |
865 | value = SSH_TUNMODE_ETHERNET; | |
866 | else if (strcasecmp(arg, "point-to-point") == 0) | |
867 | value = SSH_TUNMODE_POINTOPOINT; | |
868 | else if (strcasecmp(arg, "yes") == 0) | |
869 | value = SSH_TUNMODE_DEFAULT; | |
870 | else if (strcasecmp(arg, "no") == 0) | |
871 | value = SSH_TUNMODE_NO; | |
872 | else | |
873 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
874 | "no argument: %s", filename, linenum, arg); | |
875 | if (*activep) | |
876 | *intptr = value; | |
877 | break; | |
d20f3c9e | 878 | |
879 | case oTunnelDevice: | |
880 | arg = strdelim(&s); | |
881 | if (!arg || *arg == '\0') | |
882 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
883 | value = a2tun(arg, &value2); | |
a4f24bf8 | 884 | if (value == SSH_TUNID_ERR) |
d20f3c9e | 885 | fatal("%.200s line %d: Bad tun device.", filename, linenum); |
886 | if (*activep) { | |
887 | options->tun_local = value; | |
888 | options->tun_remote = value2; | |
889 | } | |
890 | break; | |
891 | ||
892 | case oLocalCommand: | |
893 | charptr = &options->local_command; | |
894 | goto parse_command; | |
895 | ||
896 | case oPermitLocalCommand: | |
897 | intptr = &options->permit_local_command; | |
898 | goto parse_flag; | |
899 | ||
80fcb74e | 900 | case oDeprecated: |
4feae93d | 901 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 902 | filename, linenum, keyword); |
4feae93d | 903 | return 0; |
80fcb74e | 904 | |
a2144546 | 905 | case oUnsupported: |
906 | error("%s line %d: Unsupported option \"%s\"", | |
907 | filename, linenum, keyword); | |
908 | return 0; | |
909 | ||
5260325f | 910 | default: |
911 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
912 | } | |
913 | ||
914 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 915 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 916 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
4e2e5cfd | 917 | filename, linenum, arg); |
089fbbd2 | 918 | } |
5260325f | 919 | return 0; |
8efc0c15 | 920 | } |
921 | ||
922 | ||
aa3378df | 923 | /* |
924 | * Reads the config file and modifies the options accordingly. Options | |
925 | * should already be initialized before this call. This never returns if | |
93111dfa | 926 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 927 | */ |
8efc0c15 | 928 | |
93111dfa | 929 | int |
f2107e97 | 930 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 931 | int checkperm) |
8efc0c15 | 932 | { |
5260325f | 933 | FILE *f; |
934 | char line[1024]; | |
935 | int active, linenum; | |
936 | int bad_options = 0; | |
937 | ||
938 | /* Open the file. */ | |
9f6cab4b | 939 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 940 | return 0; |
5260325f | 941 | |
9f6cab4b | 942 | if (checkperm) { |
943 | struct stat sb; | |
f2107e97 | 944 | |
f9ee425b | 945 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 946 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 947 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 948 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 949 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 950 | } |
951 | ||
5260325f | 952 | debug("Reading configuration data %.200s", filename); |
953 | ||
aa3378df | 954 | /* |
955 | * Mark that we are now processing the options. This flag is turned | |
956 | * on/off by Host specifications. | |
957 | */ | |
5260325f | 958 | active = 1; |
959 | linenum = 0; | |
960 | while (fgets(line, sizeof(line), f)) { | |
961 | /* Update line number counter. */ | |
962 | linenum++; | |
963 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
964 | bad_options++; | |
965 | } | |
966 | fclose(f); | |
967 | if (bad_options > 0) | |
54b974dc | 968 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 969 | filename, bad_options); |
93111dfa | 970 | return 1; |
8efc0c15 | 971 | } |
972 | ||
aa3378df | 973 | /* |
974 | * Initializes options to special values that indicate that they have not yet | |
975 | * been set. Read_config_file will only set options with this value. Options | |
976 | * are processed in the following order: command line, user config file, | |
977 | * system config file. Last, fill_default_options is called. | |
978 | */ | |
8efc0c15 | 979 | |
6ae2364d | 980 | void |
5260325f | 981 | initialize_options(Options * options) |
8efc0c15 | 982 | { |
5260325f | 983 | memset(options, 'X', sizeof(*options)); |
984 | options->forward_agent = -1; | |
985 | options->forward_x11 = -1; | |
d73a67d7 | 986 | options->forward_x11_trusted = -1; |
fa649821 | 987 | options->xauth_location = NULL; |
5260325f | 988 | options->gateway_ports = -1; |
989 | options->use_privileged_port = -1; | |
5260325f | 990 | options->rsa_authentication = -1; |
fa08c86b | 991 | options->pubkey_authentication = -1; |
5ba55ada | 992 | options->challenge_response_authentication = -1; |
7364bd04 | 993 | options->gss_authentication = -1; |
994 | options->gss_deleg_creds = -1; | |
5260325f | 995 | options->password_authentication = -1; |
94ec8c6b | 996 | options->kbd_interactive_authentication = -1; |
997 | options->kbd_interactive_devices = NULL; | |
5260325f | 998 | options->rhosts_rsa_authentication = -1; |
8002af61 | 999 | options->hostbased_authentication = -1; |
5260325f | 1000 | options->batch_mode = -1; |
1001 | options->check_host_ip = -1; | |
1002 | options->strict_host_key_checking = -1; | |
1003 | options->compression = -1; | |
fd573618 | 1004 | options->tcp_keep_alive = -1; |
5260325f | 1005 | options->compression_level = -1; |
1006 | options->port = -1; | |
1572b90f | 1007 | options->address_family = -1; |
5260325f | 1008 | options->connection_attempts = -1; |
09ab3296 | 1009 | options->connection_timeout = -1; |
5260325f | 1010 | options->number_of_password_prompts = -1; |
1011 | options->cipher = -1; | |
a8be9f80 | 1012 | options->ciphers = NULL; |
b2552997 | 1013 | options->macs = NULL; |
e961a8f9 | 1014 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 1015 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 1016 | options->num_identity_files = 0; |
1017 | options->hostname = NULL; | |
8abcdba4 | 1018 | options->host_key_alias = NULL; |
5260325f | 1019 | options->proxy_command = NULL; |
1020 | options->user = NULL; | |
1021 | options->escape_char = -1; | |
1022 | options->system_hostfile = NULL; | |
1023 | options->user_hostfile = NULL; | |
a306f2dd | 1024 | options->system_hostfile2 = NULL; |
1025 | options->user_hostfile2 = NULL; | |
5260325f | 1026 | options->num_local_forwards = 0; |
1027 | options->num_remote_forwards = 0; | |
e1c5bfaf | 1028 | options->clear_forwardings = -1; |
5eaf8578 | 1029 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 1030 | options->preferred_authentications = NULL; |
3435f5a6 | 1031 | options->bind_address = NULL; |
9ff6f66f | 1032 | options->smartcard_device = NULL; |
cc46e2ee | 1033 | options->enable_ssh_keysign = - 1; |
8bbc048a | 1034 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 1035 | options->identities_only = - 1; |
ffd7b36b | 1036 | options->rekey_limit = - 1; |
21289cd0 | 1037 | options->verify_host_key_dns = -1; |
5d8d32a3 | 1038 | options->server_alive_interval = -1; |
1039 | options->server_alive_count_max = -1; | |
61a2c1da | 1040 | options->num_send_env = 0; |
5e96b616 | 1041 | options->control_path = NULL; |
1042 | options->control_master = -1; | |
5c63c2ab | 1043 | options->hash_known_hosts = -1; |
d20f3c9e | 1044 | options->tun_open = -1; |
1045 | options->tun_local = -1; | |
1046 | options->tun_remote = -1; | |
1047 | options->local_command = NULL; | |
1048 | options->permit_local_command = -1; | |
8efc0c15 | 1049 | } |
1050 | ||
aa3378df | 1051 | /* |
1052 | * Called after processing other sources of option data, this fills those | |
1053 | * options for which no value has been specified with their default values. | |
1054 | */ | |
8efc0c15 | 1055 | |
6ae2364d | 1056 | void |
5260325f | 1057 | fill_default_options(Options * options) |
8efc0c15 | 1058 | { |
d2c46e77 | 1059 | int len; |
1060 | ||
5260325f | 1061 | if (options->forward_agent == -1) |
71276795 | 1062 | options->forward_agent = 0; |
5260325f | 1063 | if (options->forward_x11 == -1) |
c8d54615 | 1064 | options->forward_x11 = 0; |
d73a67d7 | 1065 | if (options->forward_x11_trusted == -1) |
1066 | options->forward_x11_trusted = 0; | |
fa649821 | 1067 | if (options->xauth_location == NULL) |
fd9ede94 | 1068 | options->xauth_location = _PATH_XAUTH; |
5260325f | 1069 | if (options->gateway_ports == -1) |
1070 | options->gateway_ports = 0; | |
1071 | if (options->use_privileged_port == -1) | |
d5ebca2b | 1072 | options->use_privileged_port = 0; |
5260325f | 1073 | if (options->rsa_authentication == -1) |
1074 | options->rsa_authentication = 1; | |
fa08c86b | 1075 | if (options->pubkey_authentication == -1) |
1076 | options->pubkey_authentication = 1; | |
5ba55ada | 1077 | if (options->challenge_response_authentication == -1) |
10a2cbef | 1078 | options->challenge_response_authentication = 1; |
7364bd04 | 1079 | if (options->gss_authentication == -1) |
2ecb78df | 1080 | options->gss_authentication = 0; |
7364bd04 | 1081 | if (options->gss_deleg_creds == -1) |
1082 | options->gss_deleg_creds = 0; | |
5260325f | 1083 | if (options->password_authentication == -1) |
1084 | options->password_authentication = 1; | |
94ec8c6b | 1085 | if (options->kbd_interactive_authentication == -1) |
d464095c | 1086 | options->kbd_interactive_authentication = 1; |
5260325f | 1087 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 1088 | options->rhosts_rsa_authentication = 0; |
8002af61 | 1089 | if (options->hostbased_authentication == -1) |
1090 | options->hostbased_authentication = 0; | |
5260325f | 1091 | if (options->batch_mode == -1) |
1092 | options->batch_mode = 0; | |
1093 | if (options->check_host_ip == -1) | |
1094 | options->check_host_ip = 1; | |
1095 | if (options->strict_host_key_checking == -1) | |
1096 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1097 | if (options->compression == -1) | |
1098 | options->compression = 0; | |
fd573618 | 1099 | if (options->tcp_keep_alive == -1) |
1100 | options->tcp_keep_alive = 1; | |
5260325f | 1101 | if (options->compression_level == -1) |
1102 | options->compression_level = 6; | |
1103 | if (options->port == -1) | |
1104 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1105 | if (options->address_family == -1) |
1106 | options->address_family = AF_UNSPEC; | |
5260325f | 1107 | if (options->connection_attempts == -1) |
ce773142 | 1108 | options->connection_attempts = 1; |
5260325f | 1109 | if (options->number_of_password_prompts == -1) |
1110 | options->number_of_password_prompts = 3; | |
1111 | /* Selected in ssh_login(). */ | |
1112 | if (options->cipher == -1) | |
1113 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1114 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1115 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1116 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1117 | if (options->protocol == SSH_PROTO_UNKNOWN) |
3e587cc3 | 1118 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; |
5260325f | 1119 | if (options->num_identity_files == 0) { |
fa08c86b | 1120 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1121 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1122 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1123 | xmalloc(len); |
1124 | snprintf(options->identity_files[options->num_identity_files++], | |
1125 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1126 | } |
1127 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1128 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1129 | options->identity_files[options->num_identity_files] = | |
1130 | xmalloc(len); | |
1131 | snprintf(options->identity_files[options->num_identity_files++], | |
1132 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1133 | ||
d2c46e77 | 1134 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1135 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1136 | xmalloc(len); |
1137 | snprintf(options->identity_files[options->num_identity_files++], | |
1138 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1139 | } |
a306f2dd | 1140 | } |
5260325f | 1141 | if (options->escape_char == -1) |
1142 | options->escape_char = '~'; | |
1143 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1144 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1145 | if (options->user_hostfile == NULL) |
42f11eb2 | 1146 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1147 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1148 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1149 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1150 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1151 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1152 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1153 | if (options->clear_forwardings == 1) |
1154 | clear_forwardings(options); | |
8bbc048a | 1155 | if (options->no_host_authentication_for_localhost == - 1) |
1156 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1157 | if (options->identities_only == -1) |
1158 | options->identities_only = 0; | |
cc46e2ee | 1159 | if (options->enable_ssh_keysign == -1) |
1160 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1161 | if (options->rekey_limit == -1) |
1162 | options->rekey_limit = 0; | |
21289cd0 | 1163 | if (options->verify_host_key_dns == -1) |
1164 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1165 | if (options->server_alive_interval == -1) |
1166 | options->server_alive_interval = 0; | |
1167 | if (options->server_alive_count_max == -1) | |
1168 | options->server_alive_count_max = 3; | |
5e96b616 | 1169 | if (options->control_master == -1) |
1170 | options->control_master = 0; | |
5c63c2ab | 1171 | if (options->hash_known_hosts == -1) |
1172 | options->hash_known_hosts = 0; | |
d20f3c9e | 1173 | if (options->tun_open == -1) |
a4f24bf8 | 1174 | options->tun_open = SSH_TUNMODE_NO; |
1175 | if (options->tun_local == -1) | |
1176 | options->tun_local = SSH_TUNID_ANY; | |
1177 | if (options->tun_remote == -1) | |
1178 | options->tun_remote = SSH_TUNID_ANY; | |
d20f3c9e | 1179 | if (options->permit_local_command == -1) |
1180 | options->permit_local_command = 0; | |
1181 | /* options->local_command should not be set by default */ | |
5260325f | 1182 | /* options->proxy_command should not be set by default */ |
1183 | /* options->user will be set in the main program if appropriate */ | |
1184 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1185 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1186 | /* options->preferred_authentications will be set in ssh */ |
8efc0c15 | 1187 | } |
3867aa0a | 1188 | |
1189 | /* | |
1190 | * parse_forward | |
1191 | * parses a string containing a port forwarding specification of the form: | |
1192 | * [listenhost:]listenport:connecthost:connectport | |
1193 | * returns number of arguments parsed or zero on error | |
1194 | */ | |
1195 | int | |
1196 | parse_forward(Forward *fwd, const char *fwdspec) | |
1197 | { | |
1198 | int i; | |
1199 | char *p, *cp, *fwdarg[4]; | |
1200 | ||
1201 | memset(fwd, '\0', sizeof(*fwd)); | |
1202 | ||
1203 | cp = p = xstrdup(fwdspec); | |
1204 | ||
1205 | /* skip leading spaces */ | |
1206 | while (*cp && isspace(*cp)) | |
1207 | cp++; | |
1208 | ||
1209 | for (i = 0; i < 4; ++i) | |
1210 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1211 | break; | |
1212 | ||
1213 | /* Check for trailing garbage in 4-arg case*/ | |
1214 | if (cp != NULL) | |
1215 | i = 0; /* failure */ | |
1216 | ||
1217 | switch (i) { | |
1218 | case 3: | |
1219 | fwd->listen_host = NULL; | |
1220 | fwd->listen_port = a2port(fwdarg[0]); | |
1221 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1222 | fwd->connect_port = a2port(fwdarg[2]); | |
1223 | break; | |
1224 | ||
1225 | case 4: | |
1226 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1227 | fwd->listen_port = a2port(fwdarg[1]); | |
1228 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1229 | fwd->connect_port = a2port(fwdarg[3]); | |
1230 | break; | |
1231 | default: | |
1232 | i = 0; /* failure */ | |
1233 | } | |
1234 | ||
1235 | xfree(p); | |
1236 | ||
1237 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1238 | goto fail_free; | |
1239 | ||
1240 | if (fwd->connect_host != NULL && | |
1241 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1242 | goto fail_free; | |
1243 | ||
1244 | return (i); | |
1245 | ||
1246 | fail_free: | |
1247 | if (fwd->connect_host != NULL) | |
1248 | xfree(fwd->connect_host); | |
1249 | if (fwd->listen_host != NULL) | |
1250 | xfree(fwd->listen_host); | |
1251 | return (0); | |
1252 | } |