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22616013 | 1 | /* $OpenBSD: readconf.c,v 1.167 2008/06/26 11:46:31 grunk Exp $ */ |
3c0ef626 | 2 | /* |
3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
5 | * All rights reserved | |
6 | * Functions for reading the configuration files. | |
7 | * | |
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". | |
13 | */ | |
14 | ||
15 | #include "includes.h" | |
3c0ef626 | 16 | |
9108f8d9 | 17 | #include <sys/types.h> |
18 | #include <sys/stat.h> | |
19 | #include <sys/socket.h> | |
20 | ||
21 | #include <netinet/in.h> | |
22 | ||
23 | #include <ctype.h> | |
24 | #include <errno.h> | |
25 | #include <netdb.h> | |
26 | #include <signal.h> | |
27 | #include <stdarg.h> | |
28 | #include <stdio.h> | |
29 | #include <string.h> | |
30 | #include <unistd.h> | |
31 | ||
3c0ef626 | 32 | #include "xmalloc.h" |
9108f8d9 | 33 | #include "ssh.h" |
3c0ef626 | 34 | #include "compat.h" |
35 | #include "cipher.h" | |
36 | #include "pathnames.h" | |
37 | #include "log.h" | |
9108f8d9 | 38 | #include "key.h" |
3c0ef626 | 39 | #include "readconf.h" |
40 | #include "match.h" | |
41 | #include "misc.h" | |
9108f8d9 | 42 | #include "buffer.h" |
3c0ef626 | 43 | #include "kex.h" |
44 | #include "mac.h" | |
45 | ||
46 | /* Format of the configuration file: | |
47 | ||
48 | # Configuration data is parsed as follows: | |
49 | # 1. command line options | |
50 | # 2. user-specific file | |
51 | # 3. system-wide file | |
52 | # Any configuration value is only changed the first time it is set. | |
53 | # Thus, host-specific definitions should be at the beginning of the | |
54 | # configuration file, and defaults at the end. | |
55 | ||
56 | # Host-specific declarations. These may override anything above. A single | |
57 | # host may match multiple declarations; these are processed in the order | |
58 | # that they are given in. | |
59 | ||
60 | Host *.ngs.fi ngs.fi | |
f5799ae1 | 61 | User foo |
3c0ef626 | 62 | |
63 | Host fake.com | |
64 | HostName another.host.name.real.org | |
65 | User blaah | |
66 | Port 34289 | |
67 | ForwardX11 no | |
68 | ForwardAgent no | |
69 | ||
70 | Host books.com | |
71 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
72 | Cipher 3des | |
73 | ||
74 | Host fascist.blob.com | |
75 | Port 23123 | |
76 | User tylonen | |
3c0ef626 | 77 | PasswordAuthentication no |
78 | ||
79 | Host puukko.hut.fi | |
80 | User t35124p | |
81 | ProxyCommand ssh-proxy %h %p | |
82 | ||
83 | Host *.fr | |
f5799ae1 | 84 | PublicKeyAuthentication no |
3c0ef626 | 85 | |
86 | Host *.su | |
87 | Cipher none | |
88 | PasswordAuthentication no | |
89 | ||
2c06c99b | 90 | Host vpn.fake.com |
91 | Tunnel yes | |
92 | TunnelDevice 3 | |
93 | ||
3c0ef626 | 94 | # Defaults for various options |
95 | Host * | |
96 | ForwardAgent no | |
97 | ForwardX11 no | |
3c0ef626 | 98 | PasswordAuthentication yes |
99 | RSAAuthentication yes | |
100 | RhostsRSAAuthentication yes | |
3c0ef626 | 101 | StrictHostKeyChecking yes |
cdd66111 | 102 | TcpKeepAlive no |
3c0ef626 | 103 | IdentityFile ~/.ssh/identity |
104 | Port 22 | |
105 | EscapeChar ~ | |
106 | ||
107 | */ | |
108 | ||
109 | /* Keyword tokens. */ | |
110 | ||
111 | typedef enum { | |
112 | oBadOption, | |
cdd66111 | 113 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
9108f8d9 | 114 | oExitOnForwardFailure, |
f5799ae1 | 115 | oPasswordAuthentication, oRSAAuthentication, |
3c0ef626 | 116 | oChallengeResponseAuthentication, oXAuthLocation, |
3c0ef626 | 117 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
118 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
119 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
120 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
cdd66111 | 121 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
3c0ef626 | 122 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
123 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, | |
124 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, | |
125 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, | |
126 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, | |
f5799ae1 | 127 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
0fff78ff | 128 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
129 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, | |
99be0775 | 130 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
996d5e62 | 131 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
2c06c99b | 132 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
22616013 | 133 | oVisualHostKey, |
0fff78ff | 134 | oDeprecated, oUnsupported |
3c0ef626 | 135 | } OpCodes; |
136 | ||
137 | /* Textual representations of the tokens. */ | |
138 | ||
139 | static struct { | |
140 | const char *name; | |
141 | OpCodes opcode; | |
142 | } keywords[] = { | |
143 | { "forwardagent", oForwardAgent }, | |
144 | { "forwardx11", oForwardX11 }, | |
cdd66111 | 145 | { "forwardx11trusted", oForwardX11Trusted }, |
9108f8d9 | 146 | { "exitonforwardfailure", oExitOnForwardFailure }, |
3c0ef626 | 147 | { "xauthlocation", oXAuthLocation }, |
148 | { "gatewayports", oGatewayPorts }, | |
149 | { "useprivilegedport", oUsePrivilegedPort }, | |
0fff78ff | 150 | { "rhostsauthentication", oDeprecated }, |
3c0ef626 | 151 | { "passwordauthentication", oPasswordAuthentication }, |
152 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, | |
153 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
154 | { "rsaauthentication", oRSAAuthentication }, | |
155 | { "pubkeyauthentication", oPubkeyAuthentication }, | |
156 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ | |
157 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
158 | { "hostbasedauthentication", oHostbasedAuthentication }, | |
159 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, | |
160 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
161 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
0fff78ff | 162 | { "kerberosauthentication", oUnsupported }, |
163 | { "kerberostgtpassing", oUnsupported }, | |
164 | { "afstokenpassing", oUnsupported }, | |
165 | #if defined(GSSAPI) | |
166 | { "gssapiauthentication", oGssAuthentication }, | |
167 | { "gssapidelegatecredentials", oGssDelegateCreds }, | |
168 | #else | |
169 | { "gssapiauthentication", oUnsupported }, | |
170 | { "gssapidelegatecredentials", oUnsupported }, | |
3c0ef626 | 171 | #endif |
f5799ae1 | 172 | { "fallbacktorsh", oDeprecated }, |
173 | { "usersh", oDeprecated }, | |
3c0ef626 | 174 | { "identityfile", oIdentityFile }, |
175 | { "identityfile2", oIdentityFile }, /* alias */ | |
99be0775 | 176 | { "identitiesonly", oIdentitiesOnly }, |
3c0ef626 | 177 | { "hostname", oHostName }, |
178 | { "hostkeyalias", oHostKeyAlias }, | |
179 | { "proxycommand", oProxyCommand }, | |
180 | { "port", oPort }, | |
181 | { "cipher", oCipher }, | |
182 | { "ciphers", oCiphers }, | |
183 | { "macs", oMacs }, | |
184 | { "protocol", oProtocol }, | |
185 | { "remoteforward", oRemoteForward }, | |
186 | { "localforward", oLocalForward }, | |
187 | { "user", oUser }, | |
188 | { "host", oHost }, | |
189 | { "escapechar", oEscapeChar }, | |
190 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
191 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ | |
192 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, | |
193 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ | |
194 | { "connectionattempts", oConnectionAttempts }, | |
195 | { "batchmode", oBatchMode }, | |
196 | { "checkhostip", oCheckHostIP }, | |
197 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
198 | { "compression", oCompression }, | |
199 | { "compressionlevel", oCompressionLevel }, | |
cdd66111 | 200 | { "tcpkeepalive", oTCPKeepAlive }, |
201 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
3c0ef626 | 202 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
203 | { "loglevel", oLogLevel }, | |
204 | { "dynamicforward", oDynamicForward }, | |
205 | { "preferredauthentications", oPreferredAuthentications }, | |
206 | { "hostkeyalgorithms", oHostKeyAlgorithms }, | |
207 | { "bindaddress", oBindAddress }, | |
0fff78ff | 208 | #ifdef SMARTCARD |
3c0ef626 | 209 | { "smartcarddevice", oSmartcardDevice }, |
0fff78ff | 210 | #else |
211 | { "smartcarddevice", oUnsupported }, | |
212 | #endif | |
e9a17296 | 213 | { "clearallforwardings", oClearAllForwardings }, |
6a9b3198 | 214 | { "enablesshkeysign", oEnableSSHKeysign }, |
0fff78ff | 215 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
e9a17296 | 216 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
0fff78ff | 217 | { "rekeylimit", oRekeyLimit }, |
218 | { "connecttimeout", oConnectTimeout }, | |
219 | { "addressfamily", oAddressFamily }, | |
cdd66111 | 220 | { "serveraliveinterval", oServerAliveInterval }, |
221 | { "serveralivecountmax", oServerAliveCountMax }, | |
c9f39d2c | 222 | { "sendenv", oSendEnv }, |
223 | { "controlpath", oControlPath }, | |
224 | { "controlmaster", oControlMaster }, | |
996d5e62 | 225 | { "hashknownhosts", oHashKnownHosts }, |
2c06c99b | 226 | { "tunnel", oTunnel }, |
227 | { "tunneldevice", oTunnelDevice }, | |
228 | { "localcommand", oLocalCommand }, | |
229 | { "permitlocalcommand", oPermitLocalCommand }, | |
22616013 | 230 | { "visualhostkey", oVisualHostKey }, |
e9a17296 | 231 | { NULL, oBadOption } |
3c0ef626 | 232 | }; |
233 | ||
234 | /* | |
235 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
236 | * error. | |
237 | */ | |
238 | ||
239 | void | |
996d5e62 | 240 | add_local_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 241 | { |
242 | Forward *fwd; | |
41b2f314 | 243 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
3c0ef626 | 244 | extern uid_t original_real_uid; |
996d5e62 | 245 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
3c0ef626 | 246 | fatal("Privileged ports can only be forwarded by root."); |
247 | #endif | |
248 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
249 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
250 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
996d5e62 | 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; | |
3c0ef626 | 257 | } |
258 | ||
259 | /* | |
260 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
261 | * an error. | |
262 | */ | |
263 | ||
264 | void | |
996d5e62 | 265 | add_remote_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 266 | { |
267 | Forward *fwd; | |
268 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
269 | fatal("Too many remote forwards (max %d).", | |
e9a17296 | 270 | SSH_MAX_FORWARDS_PER_DIRECTION); |
3c0ef626 | 271 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
996d5e62 | 272 | |
273 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
274 | NULL : xstrdup(newfwd->listen_host); | |
275 | fwd->listen_port = newfwd->listen_port; | |
276 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
277 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 278 | } |
279 | ||
280 | static void | |
281 | clear_forwardings(Options *options) | |
282 | { | |
283 | int i; | |
284 | ||
996d5e62 | 285 | for (i = 0; i < options->num_local_forwards; i++) { |
dec6d9fe | 286 | if (options->local_forwards[i].listen_host != NULL) |
287 | xfree(options->local_forwards[i].listen_host); | |
996d5e62 | 288 | xfree(options->local_forwards[i].connect_host); |
289 | } | |
3c0ef626 | 290 | options->num_local_forwards = 0; |
996d5e62 | 291 | for (i = 0; i < options->num_remote_forwards; i++) { |
dec6d9fe | 292 | if (options->remote_forwards[i].listen_host != NULL) |
293 | xfree(options->remote_forwards[i].listen_host); | |
996d5e62 | 294 | xfree(options->remote_forwards[i].connect_host); |
295 | } | |
3c0ef626 | 296 | options->num_remote_forwards = 0; |
2c06c99b | 297 | options->tun_open = SSH_TUNMODE_NO; |
3c0ef626 | 298 | } |
299 | ||
300 | /* | |
301 | * Returns the number of the token pointed to by cp or oBadOption. | |
302 | */ | |
303 | ||
304 | static OpCodes | |
305 | parse_token(const char *cp, const char *filename, int linenum) | |
306 | { | |
307 | u_int i; | |
308 | ||
309 | for (i = 0; keywords[i].name; i++) | |
310 | if (strcasecmp(cp, keywords[i].name) == 0) | |
311 | return keywords[i].opcode; | |
312 | ||
313 | error("%s: line %d: Bad configuration option: %s", | |
314 | filename, linenum, cp); | |
315 | return oBadOption; | |
316 | } | |
317 | ||
318 | /* | |
319 | * Processes a single option line as used in the configuration files. This | |
320 | * only sets those values that have not already been set. | |
321 | */ | |
6a9b3198 | 322 | #define WHITESPACE " \t\r\n" |
3c0ef626 | 323 | |
324 | int | |
325 | process_config_line(Options *options, const char *host, | |
326 | char *line, const char *filename, int linenum, | |
327 | int *activep) | |
328 | { | |
996d5e62 | 329 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
9108f8d9 | 330 | int opcode, *intptr, value, value2, scale; |
47686178 | 331 | LogLevel *log_level_ptr; |
9108f8d9 | 332 | long long orig, val64; |
6a9b3198 | 333 | size_t len; |
996d5e62 | 334 | Forward fwd; |
3c0ef626 | 335 | |
0fff78ff | 336 | /* Strip trailing whitespace */ |
dec6d9fe | 337 | for (len = strlen(line) - 1; len > 0; len--) { |
0fff78ff | 338 | if (strchr(WHITESPACE, line[len]) == NULL) |
339 | break; | |
340 | line[len] = '\0'; | |
341 | } | |
342 | ||
3c0ef626 | 343 | s = line; |
344 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
9108f8d9 | 345 | if ((keyword = strdelim(&s)) == NULL) |
346 | return 0; | |
3c0ef626 | 347 | /* Ignore leading whitespace. */ |
348 | if (*keyword == '\0') | |
349 | keyword = strdelim(&s); | |
350 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') | |
351 | return 0; | |
352 | ||
353 | opcode = parse_token(keyword, filename, linenum); | |
354 | ||
355 | switch (opcode) { | |
356 | case oBadOption: | |
357 | /* don't panic, but count bad options */ | |
358 | return -1; | |
359 | /* NOTREACHED */ | |
0fff78ff | 360 | case oConnectTimeout: |
361 | intptr = &options->connection_timeout; | |
cdd66111 | 362 | parse_time: |
0fff78ff | 363 | arg = strdelim(&s); |
364 | if (!arg || *arg == '\0') | |
365 | fatal("%s line %d: missing time value.", | |
366 | filename, linenum); | |
367 | if ((value = convtime(arg)) == -1) | |
368 | fatal("%s line %d: invalid time value.", | |
369 | filename, linenum); | |
799ae497 | 370 | if (*activep && *intptr == -1) |
0fff78ff | 371 | *intptr = value; |
372 | break; | |
373 | ||
3c0ef626 | 374 | case oForwardAgent: |
375 | intptr = &options->forward_agent; | |
376 | parse_flag: | |
377 | arg = strdelim(&s); | |
378 | if (!arg || *arg == '\0') | |
379 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
380 | value = 0; /* To avoid compiler warning... */ | |
381 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
382 | value = 1; | |
383 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
384 | value = 0; | |
385 | else | |
386 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
387 | if (*activep && *intptr == -1) | |
388 | *intptr = value; | |
389 | break; | |
390 | ||
391 | case oForwardX11: | |
392 | intptr = &options->forward_x11; | |
393 | goto parse_flag; | |
394 | ||
cdd66111 | 395 | case oForwardX11Trusted: |
396 | intptr = &options->forward_x11_trusted; | |
397 | goto parse_flag; | |
398 | ||
3c0ef626 | 399 | case oGatewayPorts: |
400 | intptr = &options->gateway_ports; | |
401 | goto parse_flag; | |
402 | ||
9108f8d9 | 403 | case oExitOnForwardFailure: |
404 | intptr = &options->exit_on_forward_failure; | |
405 | goto parse_flag; | |
406 | ||
3c0ef626 | 407 | case oUsePrivilegedPort: |
408 | intptr = &options->use_privileged_port; | |
409 | goto parse_flag; | |
410 | ||
3c0ef626 | 411 | case oPasswordAuthentication: |
412 | intptr = &options->password_authentication; | |
413 | goto parse_flag; | |
414 | ||
415 | case oKbdInteractiveAuthentication: | |
416 | intptr = &options->kbd_interactive_authentication; | |
417 | goto parse_flag; | |
418 | ||
419 | case oKbdInteractiveDevices: | |
420 | charptr = &options->kbd_interactive_devices; | |
421 | goto parse_string; | |
422 | ||
423 | case oPubkeyAuthentication: | |
424 | intptr = &options->pubkey_authentication; | |
425 | goto parse_flag; | |
426 | ||
427 | case oRSAAuthentication: | |
428 | intptr = &options->rsa_authentication; | |
429 | goto parse_flag; | |
430 | ||
431 | case oRhostsRSAAuthentication: | |
432 | intptr = &options->rhosts_rsa_authentication; | |
433 | goto parse_flag; | |
434 | ||
435 | case oHostbasedAuthentication: | |
436 | intptr = &options->hostbased_authentication; | |
437 | goto parse_flag; | |
438 | ||
439 | case oChallengeResponseAuthentication: | |
440 | intptr = &options->challenge_response_authentication; | |
441 | goto parse_flag; | |
0fff78ff | 442 | |
443 | case oGssAuthentication: | |
444 | intptr = &options->gss_authentication; | |
3c0ef626 | 445 | goto parse_flag; |
0fff78ff | 446 | |
447 | case oGssDelegateCreds: | |
448 | intptr = &options->gss_deleg_creds; | |
3c0ef626 | 449 | goto parse_flag; |
0fff78ff | 450 | |
3c0ef626 | 451 | case oBatchMode: |
452 | intptr = &options->batch_mode; | |
453 | goto parse_flag; | |
454 | ||
455 | case oCheckHostIP: | |
456 | intptr = &options->check_host_ip; | |
457 | goto parse_flag; | |
458 | ||
0fff78ff | 459 | case oVerifyHostKeyDNS: |
460 | intptr = &options->verify_host_key_dns; | |
cdd66111 | 461 | goto parse_yesnoask; |
0fff78ff | 462 | |
3c0ef626 | 463 | case oStrictHostKeyChecking: |
464 | intptr = &options->strict_host_key_checking; | |
cdd66111 | 465 | parse_yesnoask: |
3c0ef626 | 466 | arg = strdelim(&s); |
467 | if (!arg || *arg == '\0') | |
468 | fatal("%.200s line %d: Missing yes/no/ask argument.", | |
e9a17296 | 469 | filename, linenum); |
3c0ef626 | 470 | value = 0; /* To avoid compiler warning... */ |
471 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
472 | value = 1; | |
473 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
474 | value = 0; | |
475 | else if (strcmp(arg, "ask") == 0) | |
476 | value = 2; | |
477 | else | |
478 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
479 | if (*activep && *intptr == -1) | |
480 | *intptr = value; | |
481 | break; | |
482 | ||
483 | case oCompression: | |
484 | intptr = &options->compression; | |
485 | goto parse_flag; | |
486 | ||
cdd66111 | 487 | case oTCPKeepAlive: |
488 | intptr = &options->tcp_keep_alive; | |
3c0ef626 | 489 | goto parse_flag; |
490 | ||
491 | case oNoHostAuthenticationForLocalhost: | |
492 | intptr = &options->no_host_authentication_for_localhost; | |
493 | goto parse_flag; | |
494 | ||
495 | case oNumberOfPasswordPrompts: | |
496 | intptr = &options->number_of_password_prompts; | |
497 | goto parse_int; | |
498 | ||
499 | case oCompressionLevel: | |
500 | intptr = &options->compression_level; | |
501 | goto parse_int; | |
502 | ||
0fff78ff | 503 | case oRekeyLimit: |
0fff78ff | 504 | arg = strdelim(&s); |
505 | if (!arg || *arg == '\0') | |
506 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
507 | if (arg[0] < '0' || arg[0] > '9') | |
508 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
9108f8d9 | 509 | orig = val64 = strtoll(arg, &endofnumber, 10); |
0fff78ff | 510 | if (arg == endofnumber) |
511 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
512 | switch (toupper(*endofnumber)) { | |
9108f8d9 | 513 | case '\0': |
514 | scale = 1; | |
515 | break; | |
0fff78ff | 516 | case 'K': |
9108f8d9 | 517 | scale = 1<<10; |
0fff78ff | 518 | break; |
519 | case 'M': | |
9108f8d9 | 520 | scale = 1<<20; |
0fff78ff | 521 | break; |
522 | case 'G': | |
9108f8d9 | 523 | scale = 1<<30; |
0fff78ff | 524 | break; |
9108f8d9 | 525 | default: |
526 | fatal("%.200s line %d: Invalid RekeyLimit suffix", | |
527 | filename, linenum); | |
0fff78ff | 528 | } |
9108f8d9 | 529 | val64 *= scale; |
530 | /* detect integer wrap and too-large limits */ | |
47686178 | 531 | if ((val64 / scale) != orig || val64 > UINT_MAX) |
9108f8d9 | 532 | fatal("%.200s line %d: RekeyLimit too large", |
533 | filename, linenum); | |
534 | if (val64 < 16) | |
535 | fatal("%.200s line %d: RekeyLimit too small", | |
536 | filename, linenum); | |
47686178 | 537 | if (*activep && options->rekey_limit == -1) |
538 | options->rekey_limit = (u_int32_t)val64; | |
0fff78ff | 539 | break; |
540 | ||
3c0ef626 | 541 | case oIdentityFile: |
542 | arg = strdelim(&s); | |
543 | if (!arg || *arg == '\0') | |
544 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
545 | if (*activep) { | |
546 | intptr = &options->num_identity_files; | |
547 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
548 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
e9a17296 | 549 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
799ae497 | 550 | charptr = &options->identity_files[*intptr]; |
3c0ef626 | 551 | *charptr = xstrdup(arg); |
552 | *intptr = *intptr + 1; | |
553 | } | |
554 | break; | |
555 | ||
556 | case oXAuthLocation: | |
557 | charptr=&options->xauth_location; | |
558 | goto parse_string; | |
559 | ||
560 | case oUser: | |
561 | charptr = &options->user; | |
562 | parse_string: | |
563 | arg = strdelim(&s); | |
564 | if (!arg || *arg == '\0') | |
565 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
566 | if (*activep && *charptr == NULL) | |
567 | *charptr = xstrdup(arg); | |
568 | break; | |
569 | ||
570 | case oGlobalKnownHostsFile: | |
571 | charptr = &options->system_hostfile; | |
572 | goto parse_string; | |
573 | ||
574 | case oUserKnownHostsFile: | |
575 | charptr = &options->user_hostfile; | |
576 | goto parse_string; | |
577 | ||
578 | case oGlobalKnownHostsFile2: | |
579 | charptr = &options->system_hostfile2; | |
580 | goto parse_string; | |
581 | ||
582 | case oUserKnownHostsFile2: | |
583 | charptr = &options->user_hostfile2; | |
584 | goto parse_string; | |
585 | ||
586 | case oHostName: | |
587 | charptr = &options->hostname; | |
588 | goto parse_string; | |
589 | ||
590 | case oHostKeyAlias: | |
591 | charptr = &options->host_key_alias; | |
592 | goto parse_string; | |
593 | ||
594 | case oPreferredAuthentications: | |
595 | charptr = &options->preferred_authentications; | |
596 | goto parse_string; | |
597 | ||
598 | case oBindAddress: | |
599 | charptr = &options->bind_address; | |
600 | goto parse_string; | |
601 | ||
602 | case oSmartcardDevice: | |
603 | charptr = &options->smartcard_device; | |
604 | goto parse_string; | |
605 | ||
606 | case oProxyCommand: | |
2c06c99b | 607 | charptr = &options->proxy_command; |
608 | parse_command: | |
0fff78ff | 609 | if (s == NULL) |
610 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
6a9b3198 | 611 | len = strspn(s, WHITESPACE "="); |
3c0ef626 | 612 | if (*activep && *charptr == NULL) |
6a9b3198 | 613 | *charptr = xstrdup(s + len); |
3c0ef626 | 614 | return 0; |
615 | ||
616 | case oPort: | |
617 | intptr = &options->port; | |
618 | parse_int: | |
619 | arg = strdelim(&s); | |
620 | if (!arg || *arg == '\0') | |
621 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
622 | if (arg[0] < '0' || arg[0] > '9') | |
623 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
624 | ||
625 | /* Octal, decimal, or hex format? */ | |
626 | value = strtol(arg, &endofnumber, 0); | |
627 | if (arg == endofnumber) | |
628 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
629 | if (*activep && *intptr == -1) | |
630 | *intptr = value; | |
631 | break; | |
632 | ||
633 | case oConnectionAttempts: | |
634 | intptr = &options->connection_attempts; | |
635 | goto parse_int; | |
636 | ||
637 | case oCipher: | |
638 | intptr = &options->cipher; | |
639 | arg = strdelim(&s); | |
640 | if (!arg || *arg == '\0') | |
641 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
642 | value = cipher_number(arg); | |
643 | if (value == -1) | |
644 | fatal("%.200s line %d: Bad cipher '%s'.", | |
e9a17296 | 645 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 646 | if (*activep && *intptr == -1) |
647 | *intptr = value; | |
648 | break; | |
649 | ||
650 | case oCiphers: | |
651 | arg = strdelim(&s); | |
652 | if (!arg || *arg == '\0') | |
653 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
654 | if (!ciphers_valid(arg)) | |
655 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", | |
e9a17296 | 656 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 657 | if (*activep && options->ciphers == NULL) |
658 | options->ciphers = xstrdup(arg); | |
659 | break; | |
660 | ||
661 | case oMacs: | |
662 | arg = strdelim(&s); | |
663 | if (!arg || *arg == '\0') | |
664 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
665 | if (!mac_valid(arg)) | |
666 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
e9a17296 | 667 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 668 | if (*activep && options->macs == NULL) |
669 | options->macs = xstrdup(arg); | |
670 | break; | |
671 | ||
672 | case oHostKeyAlgorithms: | |
673 | arg = strdelim(&s); | |
674 | if (!arg || *arg == '\0') | |
675 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
676 | if (!key_names_valid2(arg)) | |
677 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
e9a17296 | 678 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 679 | if (*activep && options->hostkeyalgorithms == NULL) |
680 | options->hostkeyalgorithms = xstrdup(arg); | |
681 | break; | |
682 | ||
683 | case oProtocol: | |
684 | intptr = &options->protocol; | |
685 | arg = strdelim(&s); | |
686 | if (!arg || *arg == '\0') | |
687 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
688 | value = proto_spec(arg); | |
689 | if (value == SSH_PROTO_UNKNOWN) | |
690 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
e9a17296 | 691 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 692 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
693 | *intptr = value; | |
694 | break; | |
695 | ||
696 | case oLogLevel: | |
47686178 | 697 | log_level_ptr = &options->log_level; |
3c0ef626 | 698 | arg = strdelim(&s); |
699 | value = log_level_number(arg); | |
e9a17296 | 700 | if (value == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 701 | fatal("%.200s line %d: unsupported log level '%s'", |
e9a17296 | 702 | filename, linenum, arg ? arg : "<NONE>"); |
47686178 | 703 | if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET) |
704 | *log_level_ptr = (LogLevel) value; | |
3c0ef626 | 705 | break; |
706 | ||
707 | case oLocalForward: | |
708 | case oRemoteForward: | |
709 | arg = strdelim(&s); | |
996d5e62 | 710 | if (arg == NULL || *arg == '\0') |
3c0ef626 | 711 | fatal("%.200s line %d: Missing port argument.", |
712 | filename, linenum); | |
996d5e62 | 713 | arg2 = strdelim(&s); |
714 | if (arg2 == NULL || *arg2 == '\0') | |
715 | fatal("%.200s line %d: Missing target argument.", | |
3c0ef626 | 716 | filename, linenum); |
996d5e62 | 717 | |
718 | /* construct a string for parse_forward */ | |
719 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
720 | ||
721 | if (parse_forward(&fwd, fwdarg) == 0) | |
3c0ef626 | 722 | fatal("%.200s line %d: Bad forwarding specification.", |
723 | filename, linenum); | |
996d5e62 | 724 | |
3c0ef626 | 725 | if (*activep) { |
726 | if (opcode == oLocalForward) | |
996d5e62 | 727 | add_local_forward(options, &fwd); |
3c0ef626 | 728 | else if (opcode == oRemoteForward) |
996d5e62 | 729 | add_remote_forward(options, &fwd); |
3c0ef626 | 730 | } |
731 | break; | |
732 | ||
733 | case oDynamicForward: | |
734 | arg = strdelim(&s); | |
735 | if (!arg || *arg == '\0') | |
736 | fatal("%.200s line %d: Missing port argument.", | |
737 | filename, linenum); | |
996d5e62 | 738 | memset(&fwd, '\0', sizeof(fwd)); |
739 | fwd.connect_host = "socks"; | |
740 | fwd.listen_host = hpdelim(&arg); | |
741 | if (fwd.listen_host == NULL || | |
742 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
743 | fatal("%.200s line %d: Bad forwarding specification.", | |
744 | filename, linenum); | |
745 | if (arg) { | |
746 | fwd.listen_port = a2port(arg); | |
747 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
748 | } else { | |
749 | fwd.listen_port = a2port(fwd.listen_host); | |
665a873d | 750 | fwd.listen_host = NULL; |
996d5e62 | 751 | } |
752 | if (fwd.listen_port == 0) | |
3c0ef626 | 753 | fatal("%.200s line %d: Badly formatted port number.", |
754 | filename, linenum); | |
755 | if (*activep) | |
996d5e62 | 756 | add_local_forward(options, &fwd); |
3c0ef626 | 757 | break; |
758 | ||
759 | case oClearAllForwardings: | |
760 | intptr = &options->clear_forwardings; | |
761 | goto parse_flag; | |
762 | ||
763 | case oHost: | |
764 | *activep = 0; | |
765 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') | |
766 | if (match_pattern(host, arg)) { | |
767 | debug("Applying options for %.100s", arg); | |
768 | *activep = 1; | |
769 | break; | |
770 | } | |
771 | /* Avoid garbage check below, as strdelim is done. */ | |
772 | return 0; | |
773 | ||
774 | case oEscapeChar: | |
775 | intptr = &options->escape_char; | |
776 | arg = strdelim(&s); | |
777 | if (!arg || *arg == '\0') | |
778 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
779 | if (arg[0] == '^' && arg[2] == 0 && | |
780 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) | |
781 | value = (u_char) arg[1] & 31; | |
782 | else if (strlen(arg) == 1) | |
783 | value = (u_char) arg[0]; | |
784 | else if (strcmp(arg, "none") == 0) | |
785 | value = SSH_ESCAPECHAR_NONE; | |
786 | else { | |
787 | fatal("%.200s line %d: Bad escape character.", | |
e9a17296 | 788 | filename, linenum); |
3c0ef626 | 789 | /* NOTREACHED */ |
790 | value = 0; /* Avoid compiler warning. */ | |
791 | } | |
792 | if (*activep && *intptr == -1) | |
793 | *intptr = value; | |
794 | break; | |
795 | ||
0fff78ff | 796 | case oAddressFamily: |
797 | arg = strdelim(&s); | |
665a873d | 798 | if (!arg || *arg == '\0') |
799 | fatal("%s line %d: missing address family.", | |
800 | filename, linenum); | |
0fff78ff | 801 | intptr = &options->address_family; |
802 | if (strcasecmp(arg, "inet") == 0) | |
803 | value = AF_INET; | |
804 | else if (strcasecmp(arg, "inet6") == 0) | |
805 | value = AF_INET6; | |
806 | else if (strcasecmp(arg, "any") == 0) | |
807 | value = AF_UNSPEC; | |
808 | else | |
809 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
810 | if (*activep && *intptr == -1) | |
811 | *intptr = value; | |
812 | break; | |
813 | ||
6a9b3198 | 814 | case oEnableSSHKeysign: |
815 | intptr = &options->enable_ssh_keysign; | |
816 | goto parse_flag; | |
817 | ||
99be0775 | 818 | case oIdentitiesOnly: |
819 | intptr = &options->identities_only; | |
820 | goto parse_flag; | |
821 | ||
cdd66111 | 822 | case oServerAliveInterval: |
823 | intptr = &options->server_alive_interval; | |
824 | goto parse_time; | |
825 | ||
826 | case oServerAliveCountMax: | |
827 | intptr = &options->server_alive_count_max; | |
828 | goto parse_int; | |
829 | ||
c9f39d2c | 830 | case oSendEnv: |
831 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
832 | if (strchr(arg, '=') != NULL) | |
833 | fatal("%s line %d: Invalid environment name.", | |
834 | filename, linenum); | |
996d5e62 | 835 | if (!*activep) |
836 | continue; | |
c9f39d2c | 837 | if (options->num_send_env >= MAX_SEND_ENV) |
838 | fatal("%s line %d: too many send env.", | |
839 | filename, linenum); | |
840 | options->send_env[options->num_send_env++] = | |
841 | xstrdup(arg); | |
842 | } | |
843 | break; | |
844 | ||
845 | case oControlPath: | |
846 | charptr = &options->control_path; | |
847 | goto parse_string; | |
848 | ||
849 | case oControlMaster: | |
850 | intptr = &options->control_master; | |
665a873d | 851 | arg = strdelim(&s); |
852 | if (!arg || *arg == '\0') | |
853 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
854 | filename, linenum); | |
855 | value = 0; /* To avoid compiler warning... */ | |
856 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
857 | value = SSHCTL_MASTER_YES; | |
858 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
859 | value = SSHCTL_MASTER_NO; | |
860 | else if (strcmp(arg, "auto") == 0) | |
861 | value = SSHCTL_MASTER_AUTO; | |
862 | else if (strcmp(arg, "ask") == 0) | |
863 | value = SSHCTL_MASTER_ASK; | |
864 | else if (strcmp(arg, "autoask") == 0) | |
865 | value = SSHCTL_MASTER_AUTO_ASK; | |
866 | else | |
867 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
868 | filename, linenum); | |
869 | if (*activep && *intptr == -1) | |
870 | *intptr = value; | |
871 | break; | |
c9f39d2c | 872 | |
996d5e62 | 873 | case oHashKnownHosts: |
874 | intptr = &options->hash_known_hosts; | |
875 | goto parse_flag; | |
876 | ||
2c06c99b | 877 | case oTunnel: |
878 | intptr = &options->tun_open; | |
879 | arg = strdelim(&s); | |
880 | if (!arg || *arg == '\0') | |
881 | fatal("%s line %d: Missing yes/point-to-point/" | |
882 | "ethernet/no argument.", filename, linenum); | |
883 | value = 0; /* silence compiler */ | |
884 | if (strcasecmp(arg, "ethernet") == 0) | |
885 | value = SSH_TUNMODE_ETHERNET; | |
886 | else if (strcasecmp(arg, "point-to-point") == 0) | |
887 | value = SSH_TUNMODE_POINTOPOINT; | |
888 | else if (strcasecmp(arg, "yes") == 0) | |
889 | value = SSH_TUNMODE_DEFAULT; | |
890 | else if (strcasecmp(arg, "no") == 0) | |
891 | value = SSH_TUNMODE_NO; | |
892 | else | |
893 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
894 | "no argument: %s", filename, linenum, arg); | |
895 | if (*activep) | |
896 | *intptr = value; | |
897 | break; | |
898 | ||
899 | case oTunnelDevice: | |
900 | arg = strdelim(&s); | |
901 | if (!arg || *arg == '\0') | |
902 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
903 | value = a2tun(arg, &value2); | |
904 | if (value == SSH_TUNID_ERR) | |
905 | fatal("%.200s line %d: Bad tun device.", filename, linenum); | |
906 | if (*activep) { | |
907 | options->tun_local = value; | |
908 | options->tun_remote = value2; | |
909 | } | |
910 | break; | |
911 | ||
912 | case oLocalCommand: | |
913 | charptr = &options->local_command; | |
914 | goto parse_command; | |
915 | ||
916 | case oPermitLocalCommand: | |
917 | intptr = &options->permit_local_command; | |
918 | goto parse_flag; | |
919 | ||
22616013 | 920 | case oVisualHostKey: |
921 | intptr = &options->visual_host_key; | |
922 | goto parse_flag; | |
923 | ||
f5799ae1 | 924 | case oDeprecated: |
925 | debug("%s line %d: Deprecated option \"%s\"", | |
926 | filename, linenum, keyword); | |
927 | return 0; | |
928 | ||
0fff78ff | 929 | case oUnsupported: |
930 | error("%s line %d: Unsupported option \"%s\"", | |
931 | filename, linenum, keyword); | |
932 | return 0; | |
933 | ||
3c0ef626 | 934 | default: |
935 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
936 | } | |
937 | ||
938 | /* Check that there is no garbage at end of line. */ | |
939 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
940 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
665a873d | 941 | filename, linenum, arg); |
3c0ef626 | 942 | } |
943 | return 0; | |
944 | } | |
945 | ||
946 | ||
947 | /* | |
948 | * Reads the config file and modifies the options accordingly. Options | |
949 | * should already be initialized before this call. This never returns if | |
950 | * there is an error. If the file does not exist, this returns 0. | |
951 | */ | |
952 | ||
953 | int | |
c9f39d2c | 954 | read_config_file(const char *filename, const char *host, Options *options, |
955 | int checkperm) | |
3c0ef626 | 956 | { |
957 | FILE *f; | |
958 | char line[1024]; | |
959 | int active, linenum; | |
960 | int bad_options = 0; | |
961 | ||
962 | /* Open the file. */ | |
c9f39d2c | 963 | if ((f = fopen(filename, "r")) == NULL) |
3c0ef626 | 964 | return 0; |
965 | ||
c9f39d2c | 966 | if (checkperm) { |
967 | struct stat sb; | |
968 | ||
969 | if (fstat(fileno(f), &sb) == -1) | |
970 | fatal("fstat %s: %s", filename, strerror(errno)); | |
971 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || | |
972 | (sb.st_mode & 022) != 0)) | |
973 | fatal("Bad owner or permissions on %s", filename); | |
974 | } | |
975 | ||
3c0ef626 | 976 | debug("Reading configuration data %.200s", filename); |
977 | ||
978 | /* | |
979 | * Mark that we are now processing the options. This flag is turned | |
980 | * on/off by Host specifications. | |
981 | */ | |
982 | active = 1; | |
983 | linenum = 0; | |
984 | while (fgets(line, sizeof(line), f)) { | |
985 | /* Update line number counter. */ | |
986 | linenum++; | |
987 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
988 | bad_options++; | |
989 | } | |
990 | fclose(f); | |
991 | if (bad_options > 0) | |
992 | fatal("%s: terminating, %d bad configuration options", | |
e9a17296 | 993 | filename, bad_options); |
3c0ef626 | 994 | return 1; |
995 | } | |
996 | ||
997 | /* | |
998 | * Initializes options to special values that indicate that they have not yet | |
999 | * been set. Read_config_file will only set options with this value. Options | |
1000 | * are processed in the following order: command line, user config file, | |
1001 | * system config file. Last, fill_default_options is called. | |
1002 | */ | |
1003 | ||
1004 | void | |
1005 | initialize_options(Options * options) | |
1006 | { | |
1007 | memset(options, 'X', sizeof(*options)); | |
1008 | options->forward_agent = -1; | |
1009 | options->forward_x11 = -1; | |
cdd66111 | 1010 | options->forward_x11_trusted = -1; |
9108f8d9 | 1011 | options->exit_on_forward_failure = -1; |
3c0ef626 | 1012 | options->xauth_location = NULL; |
1013 | options->gateway_ports = -1; | |
1014 | options->use_privileged_port = -1; | |
3c0ef626 | 1015 | options->rsa_authentication = -1; |
1016 | options->pubkey_authentication = -1; | |
1017 | options->challenge_response_authentication = -1; | |
0fff78ff | 1018 | options->gss_authentication = -1; |
1019 | options->gss_deleg_creds = -1; | |
3c0ef626 | 1020 | options->password_authentication = -1; |
1021 | options->kbd_interactive_authentication = -1; | |
1022 | options->kbd_interactive_devices = NULL; | |
1023 | options->rhosts_rsa_authentication = -1; | |
1024 | options->hostbased_authentication = -1; | |
3c0ef626 | 1025 | options->batch_mode = -1; |
1026 | options->check_host_ip = -1; | |
1027 | options->strict_host_key_checking = -1; | |
1028 | options->compression = -1; | |
cdd66111 | 1029 | options->tcp_keep_alive = -1; |
3c0ef626 | 1030 | options->compression_level = -1; |
1031 | options->port = -1; | |
0fff78ff | 1032 | options->address_family = -1; |
3c0ef626 | 1033 | options->connection_attempts = -1; |
0fff78ff | 1034 | options->connection_timeout = -1; |
3c0ef626 | 1035 | options->number_of_password_prompts = -1; |
1036 | options->cipher = -1; | |
1037 | options->ciphers = NULL; | |
1038 | options->macs = NULL; | |
1039 | options->hostkeyalgorithms = NULL; | |
1040 | options->protocol = SSH_PROTO_UNKNOWN; | |
1041 | options->num_identity_files = 0; | |
1042 | options->hostname = NULL; | |
1043 | options->host_key_alias = NULL; | |
1044 | options->proxy_command = NULL; | |
1045 | options->user = NULL; | |
1046 | options->escape_char = -1; | |
1047 | options->system_hostfile = NULL; | |
1048 | options->user_hostfile = NULL; | |
1049 | options->system_hostfile2 = NULL; | |
1050 | options->user_hostfile2 = NULL; | |
1051 | options->num_local_forwards = 0; | |
1052 | options->num_remote_forwards = 0; | |
1053 | options->clear_forwardings = -1; | |
e9a17296 | 1054 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
3c0ef626 | 1055 | options->preferred_authentications = NULL; |
1056 | options->bind_address = NULL; | |
1057 | options->smartcard_device = NULL; | |
6a9b3198 | 1058 | options->enable_ssh_keysign = - 1; |
3c0ef626 | 1059 | options->no_host_authentication_for_localhost = - 1; |
99be0775 | 1060 | options->identities_only = - 1; |
0fff78ff | 1061 | options->rekey_limit = - 1; |
1062 | options->verify_host_key_dns = -1; | |
cdd66111 | 1063 | options->server_alive_interval = -1; |
1064 | options->server_alive_count_max = -1; | |
c9f39d2c | 1065 | options->num_send_env = 0; |
1066 | options->control_path = NULL; | |
1067 | options->control_master = -1; | |
996d5e62 | 1068 | options->hash_known_hosts = -1; |
2c06c99b | 1069 | options->tun_open = -1; |
1070 | options->tun_local = -1; | |
1071 | options->tun_remote = -1; | |
1072 | options->local_command = NULL; | |
1073 | options->permit_local_command = -1; | |
22616013 | 1074 | options->visual_host_key = -1; |
3c0ef626 | 1075 | } |
1076 | ||
1077 | /* | |
1078 | * Called after processing other sources of option data, this fills those | |
1079 | * options for which no value has been specified with their default values. | |
1080 | */ | |
1081 | ||
1082 | void | |
1083 | fill_default_options(Options * options) | |
1084 | { | |
1085 | int len; | |
1086 | ||
1087 | if (options->forward_agent == -1) | |
1088 | options->forward_agent = 0; | |
1089 | if (options->forward_x11 == -1) | |
1090 | options->forward_x11 = 0; | |
cdd66111 | 1091 | if (options->forward_x11_trusted == -1) |
1092 | options->forward_x11_trusted = 0; | |
9108f8d9 | 1093 | if (options->exit_on_forward_failure == -1) |
1094 | options->exit_on_forward_failure = 0; | |
3c0ef626 | 1095 | if (options->xauth_location == NULL) |
1096 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 1097 | if (options->gateway_ports == -1) |
1098 | options->gateway_ports = 0; | |
1099 | if (options->use_privileged_port == -1) | |
1100 | options->use_privileged_port = 0; | |
3c0ef626 | 1101 | if (options->rsa_authentication == -1) |
1102 | options->rsa_authentication = 1; | |
1103 | if (options->pubkey_authentication == -1) | |
1104 | options->pubkey_authentication = 1; | |
1105 | if (options->challenge_response_authentication == -1) | |
1106 | options->challenge_response_authentication = 1; | |
0fff78ff | 1107 | if (options->gss_authentication == -1) |
cdd66111 | 1108 | options->gss_authentication = 0; |
0fff78ff | 1109 | if (options->gss_deleg_creds == -1) |
1110 | options->gss_deleg_creds = 0; | |
3c0ef626 | 1111 | if (options->password_authentication == -1) |
1112 | options->password_authentication = 1; | |
1113 | if (options->kbd_interactive_authentication == -1) | |
1114 | options->kbd_interactive_authentication = 1; | |
1115 | if (options->rhosts_rsa_authentication == -1) | |
f5799ae1 | 1116 | options->rhosts_rsa_authentication = 0; |
3c0ef626 | 1117 | if (options->hostbased_authentication == -1) |
1118 | options->hostbased_authentication = 0; | |
3c0ef626 | 1119 | if (options->batch_mode == -1) |
1120 | options->batch_mode = 0; | |
1121 | if (options->check_host_ip == -1) | |
1122 | options->check_host_ip = 1; | |
1123 | if (options->strict_host_key_checking == -1) | |
1124 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1125 | if (options->compression == -1) | |
1126 | options->compression = 0; | |
cdd66111 | 1127 | if (options->tcp_keep_alive == -1) |
1128 | options->tcp_keep_alive = 1; | |
3c0ef626 | 1129 | if (options->compression_level == -1) |
1130 | options->compression_level = 6; | |
1131 | if (options->port == -1) | |
1132 | options->port = 0; /* Filled in ssh_connect. */ | |
0fff78ff | 1133 | if (options->address_family == -1) |
1134 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 1135 | if (options->connection_attempts == -1) |
1136 | options->connection_attempts = 1; | |
1137 | if (options->number_of_password_prompts == -1) | |
1138 | options->number_of_password_prompts = 3; | |
1139 | /* Selected in ssh_login(). */ | |
1140 | if (options->cipher == -1) | |
1141 | options->cipher = SSH_CIPHER_NOT_SET; | |
1142 | /* options->ciphers, default set in myproposals.h */ | |
1143 | /* options->macs, default set in myproposals.h */ | |
1144 | /* options->hostkeyalgorithms, default set in myproposals.h */ | |
1145 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
1146 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
1147 | if (options->num_identity_files == 0) { | |
1148 | if (options->protocol & SSH_PROTO_1) { | |
1149 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; | |
1150 | options->identity_files[options->num_identity_files] = | |
1151 | xmalloc(len); | |
1152 | snprintf(options->identity_files[options->num_identity_files++], | |
1153 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
1154 | } | |
1155 | if (options->protocol & SSH_PROTO_2) { | |
1156 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; | |
1157 | options->identity_files[options->num_identity_files] = | |
1158 | xmalloc(len); | |
1159 | snprintf(options->identity_files[options->num_identity_files++], | |
1160 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1161 | ||
1162 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; | |
1163 | options->identity_files[options->num_identity_files] = | |
1164 | xmalloc(len); | |
1165 | snprintf(options->identity_files[options->num_identity_files++], | |
1166 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
1167 | } | |
1168 | } | |
1169 | if (options->escape_char == -1) | |
1170 | options->escape_char = '~'; | |
1171 | if (options->system_hostfile == NULL) | |
1172 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; | |
1173 | if (options->user_hostfile == NULL) | |
1174 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; | |
1175 | if (options->system_hostfile2 == NULL) | |
1176 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; | |
1177 | if (options->user_hostfile2 == NULL) | |
1178 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; | |
e9a17296 | 1179 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 1180 | options->log_level = SYSLOG_LEVEL_INFO; |
1181 | if (options->clear_forwardings == 1) | |
1182 | clear_forwardings(options); | |
1183 | if (options->no_host_authentication_for_localhost == - 1) | |
1184 | options->no_host_authentication_for_localhost = 0; | |
99be0775 | 1185 | if (options->identities_only == -1) |
1186 | options->identities_only = 0; | |
6a9b3198 | 1187 | if (options->enable_ssh_keysign == -1) |
1188 | options->enable_ssh_keysign = 0; | |
0fff78ff | 1189 | if (options->rekey_limit == -1) |
1190 | options->rekey_limit = 0; | |
1191 | if (options->verify_host_key_dns == -1) | |
1192 | options->verify_host_key_dns = 0; | |
cdd66111 | 1193 | if (options->server_alive_interval == -1) |
1194 | options->server_alive_interval = 0; | |
1195 | if (options->server_alive_count_max == -1) | |
1196 | options->server_alive_count_max = 3; | |
c9f39d2c | 1197 | if (options->control_master == -1) |
1198 | options->control_master = 0; | |
996d5e62 | 1199 | if (options->hash_known_hosts == -1) |
1200 | options->hash_known_hosts = 0; | |
2c06c99b | 1201 | if (options->tun_open == -1) |
1202 | options->tun_open = SSH_TUNMODE_NO; | |
1203 | if (options->tun_local == -1) | |
1204 | options->tun_local = SSH_TUNID_ANY; | |
1205 | if (options->tun_remote == -1) | |
1206 | options->tun_remote = SSH_TUNID_ANY; | |
1207 | if (options->permit_local_command == -1) | |
1208 | options->permit_local_command = 0; | |
22616013 | 1209 | if (options->visual_host_key == -1) |
1210 | options->visual_host_key = 0; | |
2c06c99b | 1211 | /* options->local_command should not be set by default */ |
3c0ef626 | 1212 | /* options->proxy_command should not be set by default */ |
1213 | /* options->user will be set in the main program if appropriate */ | |
1214 | /* options->hostname will be set in the main program if appropriate */ | |
1215 | /* options->host_key_alias should not be set by default */ | |
1216 | /* options->preferred_authentications will be set in ssh */ | |
1217 | } | |
996d5e62 | 1218 | |
1219 | /* | |
1220 | * parse_forward | |
1221 | * parses a string containing a port forwarding specification of the form: | |
1222 | * [listenhost:]listenport:connecthost:connectport | |
1223 | * returns number of arguments parsed or zero on error | |
1224 | */ | |
1225 | int | |
1226 | parse_forward(Forward *fwd, const char *fwdspec) | |
1227 | { | |
1228 | int i; | |
1229 | char *p, *cp, *fwdarg[4]; | |
1230 | ||
1231 | memset(fwd, '\0', sizeof(*fwd)); | |
1232 | ||
1233 | cp = p = xstrdup(fwdspec); | |
1234 | ||
1235 | /* skip leading spaces */ | |
d4487008 | 1236 | while (isspace(*cp)) |
996d5e62 | 1237 | cp++; |
1238 | ||
1239 | for (i = 0; i < 4; ++i) | |
1240 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1241 | break; | |
1242 | ||
1243 | /* Check for trailing garbage in 4-arg case*/ | |
1244 | if (cp != NULL) | |
1245 | i = 0; /* failure */ | |
1246 | ||
1247 | switch (i) { | |
1248 | case 3: | |
1249 | fwd->listen_host = NULL; | |
1250 | fwd->listen_port = a2port(fwdarg[0]); | |
1251 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1252 | fwd->connect_port = a2port(fwdarg[2]); | |
1253 | break; | |
1254 | ||
1255 | case 4: | |
1256 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1257 | fwd->listen_port = a2port(fwdarg[1]); | |
1258 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1259 | fwd->connect_port = a2port(fwdarg[3]); | |
1260 | break; | |
1261 | default: | |
1262 | i = 0; /* failure */ | |
1263 | } | |
1264 | ||
1265 | xfree(p); | |
1266 | ||
47686178 | 1267 | if (fwd->listen_port == 0 || fwd->connect_port == 0) |
996d5e62 | 1268 | goto fail_free; |
1269 | ||
1270 | if (fwd->connect_host != NULL && | |
1271 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1272 | goto fail_free; | |
1273 | ||
1274 | return (i); | |
1275 | ||
1276 | fail_free: | |
1277 | if (fwd->connect_host != NULL) | |
1278 | xfree(fwd->connect_host); | |
1279 | if (fwd->listen_host != NULL) | |
1280 | xfree(fwd->listen_host); | |
1281 | return (0); | |
1282 | } |