blob: c556b8338115de5b8b407fecbeedcbe5d8469542 [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
Damien Miller95def091999-11-25 00:26:21 +11003 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * Functions for reading the configuration files.
Damien Miller4af51302000-04-16 11:18:38 +10006 *
Damien Millere4340be2000-09-16 13:29:08 +11007 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
Damien Miller95def091999-11-25 00:26:21 +110012 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100013
14#include "includes.h"
Ben Lindstromf7db3bb2001-08-06 21:35:51 +000015RCSID("$OpenBSD: readconf.c,v 1.86 2001/08/01 22:03:33 markus Exp $");
Damien Millerd4a8b7e1999-10-27 13:42:43 +100016
17#include "ssh.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100018#include "xmalloc.h"
Damien Miller78928792000-04-12 20:17:38 +100019#include "compat.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000020#include "cipher.h"
21#include "pathnames.h"
22#include "log.h"
23#include "readconf.h"
24#include "match.h"
25#include "misc.h"
Ben Lindstrom06b33aa2001-02-15 03:01:59 +000026#include "kex.h"
27#include "mac.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100028
29/* Format of the configuration file:
30
31 # Configuration data is parsed as follows:
32 # 1. command line options
33 # 2. user-specific file
34 # 3. system-wide file
35 # Any configuration value is only changed the first time it is set.
36 # Thus, host-specific definitions should be at the beginning of the
37 # configuration file, and defaults at the end.
38
39 # Host-specific declarations. These may override anything above. A single
40 # host may match multiple declarations; these are processed in the order
41 # that they are given in.
42
43 Host *.ngs.fi ngs.fi
44 FallBackToRsh no
45
46 Host fake.com
47 HostName another.host.name.real.org
48 User blaah
49 Port 34289
50 ForwardX11 no
51 ForwardAgent no
52
53 Host books.com
54 RemoteForward 9999 shadows.cs.hut.fi:9999
55 Cipher 3des
56
57 Host fascist.blob.com
58 Port 23123
59 User tylonen
60 RhostsAuthentication no
61 PasswordAuthentication no
62
63 Host puukko.hut.fi
64 User t35124p
65 ProxyCommand ssh-proxy %h %p
66
67 Host *.fr
68 UseRsh yes
69
70 Host *.su
71 Cipher none
72 PasswordAuthentication no
73
74 # Defaults for various options
75 Host *
76 ForwardAgent no
Damien Miller0bc1bd82000-11-13 22:57:25 +110077 ForwardX11 no
Damien Millerd4a8b7e1999-10-27 13:42:43 +100078 RhostsAuthentication yes
79 PasswordAuthentication yes
80 RSAAuthentication yes
81 RhostsRSAAuthentication yes
82 FallBackToRsh no
83 UseRsh no
84 StrictHostKeyChecking yes
85 KeepAlives no
86 IdentityFile ~/.ssh/identity
87 Port 22
88 EscapeChar ~
89
90*/
91
92/* Keyword tokens. */
93
Damien Miller95def091999-11-25 00:26:21 +110094typedef enum {
95 oBadOption,
96 oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
97 oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh,
Ben Lindstrom95fb2dd2001-01-23 03:12:10 +000098 oChallengeResponseAuthentication, oXAuthLocation,
Ben Lindstromec95ed92001-07-04 04:21:14 +000099#if defined(KRB4) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100100 oKerberosAuthentication,
Ben Lindstromec95ed92001-07-04 04:21:14 +0000101#endif
102#if defined(AFS) || defined(KRB5)
103 oKerberosTgtPassing,
104#endif
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000105#ifdef AFS
Ben Lindstromec95ed92001-07-04 04:21:14 +0000106 oAFSTokenPassing,
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000107#endif
Damien Miller95def091999-11-25 00:26:21 +1100108 oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
109 oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
110 oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
111 oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
Ben Lindstrom95fb2dd2001-01-23 03:12:10 +0000112 oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts,
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000113 oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
Damien Miller0bc1bd82000-11-13 22:57:25 +1100114 oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
Ben Lindstromb9be60a2001-03-11 01:49:19 +0000115 oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
Ben Lindstrom982dbbc2001-04-17 18:11:36 +0000116 oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
Ben Lindstromae996bf2001-08-06 21:27:53 +0000117 oHostKeyAlgorithms, oBindAddress, oSmartcardDevice
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000118} OpCodes;
119
120/* Textual representations of the tokens. */
121
Damien Miller95def091999-11-25 00:26:21 +1100122static struct {
123 const char *name;
124 OpCodes opcode;
125} keywords[] = {
126 { "forwardagent", oForwardAgent },
127 { "forwardx11", oForwardX11 },
Damien Millerd3a18572000-06-07 19:55:44 +1000128 { "xauthlocation", oXAuthLocation },
Damien Miller95def091999-11-25 00:26:21 +1100129 { "gatewayports", oGatewayPorts },
130 { "useprivilegedport", oUsePrivilegedPort },
131 { "rhostsauthentication", oRhostsAuthentication },
132 { "passwordauthentication", oPasswordAuthentication },
Damien Miller874d77b2000-10-14 16:23:11 +1100133 { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
134 { "kbdinteractivedevices", oKbdInteractiveDevices },
Damien Miller95def091999-11-25 00:26:21 +1100135 { "rsaauthentication", oRSAAuthentication },
Damien Miller0bc1bd82000-11-13 22:57:25 +1100136 { "pubkeyauthentication", oPubkeyAuthentication },
Ben Lindstrom95fb2dd2001-01-23 03:12:10 +0000137 { "dsaauthentication", oPubkeyAuthentication }, /* alias */
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000138 { "rhostsrsaauthentication", oRhostsRSAAuthentication },
Ben Lindstromd69dab32001-04-12 23:36:05 +0000139 { "hostbasedauthentication", oHostbasedAuthentication },
Ben Lindstrom95fb2dd2001-01-23 03:12:10 +0000140 { "challengeresponseauthentication", oChallengeResponseAuthentication },
141 { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
142 { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
Ben Lindstromec95ed92001-07-04 04:21:14 +0000143#if defined(KRB4) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100144 { "kerberosauthentication", oKerberosAuthentication },
Ben Lindstromec95ed92001-07-04 04:21:14 +0000145#endif
146#if defined(AFS) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100147 { "kerberostgtpassing", oKerberosTgtPassing },
Ben Lindstromec95ed92001-07-04 04:21:14 +0000148#endif
149#ifdef AFS
Damien Miller95def091999-11-25 00:26:21 +1100150 { "afstokenpassing", oAFSTokenPassing },
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000151#endif
Damien Miller95def091999-11-25 00:26:21 +1100152 { "fallbacktorsh", oFallBackToRsh },
153 { "usersh", oUseRsh },
154 { "identityfile", oIdentityFile },
Damien Miller0bc1bd82000-11-13 22:57:25 +1100155 { "identityfile2", oIdentityFile }, /* alias */
Damien Miller95def091999-11-25 00:26:21 +1100156 { "hostname", oHostName },
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000157 { "hostkeyalias", oHostKeyAlias },
Damien Miller95def091999-11-25 00:26:21 +1100158 { "proxycommand", oProxyCommand },
159 { "port", oPort },
160 { "cipher", oCipher },
Damien Miller78928792000-04-12 20:17:38 +1000161 { "ciphers", oCiphers },
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000162 { "macs", oMacs },
Damien Miller78928792000-04-12 20:17:38 +1000163 { "protocol", oProtocol },
Damien Miller95def091999-11-25 00:26:21 +1100164 { "remoteforward", oRemoteForward },
165 { "localforward", oLocalForward },
166 { "user", oUser },
167 { "host", oHost },
168 { "escapechar", oEscapeChar },
Damien Miller95def091999-11-25 00:26:21 +1100169 { "globalknownhostsfile", oGlobalKnownHostsFile },
Ben Lindstromd6481ea2001-06-25 04:37:41 +0000170 { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
Damien Millereba71ba2000-04-29 23:57:08 +1000171 { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
Ben Lindstromd6481ea2001-06-25 04:37:41 +0000172 { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
Damien Miller95def091999-11-25 00:26:21 +1100173 { "connectionattempts", oConnectionAttempts },
174 { "batchmode", oBatchMode },
175 { "checkhostip", oCheckHostIP },
176 { "stricthostkeychecking", oStrictHostKeyChecking },
177 { "compression", oCompression },
178 { "compressionlevel", oCompressionLevel },
179 { "keepalive", oKeepAlives },
180 { "numberofpasswordprompts", oNumberOfPasswordPrompts },
Damien Miller95def091999-11-25 00:26:21 +1100181 { "loglevel", oLogLevel },
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000182 { "dynamicforward", oDynamicForward },
Ben Lindstromb9be60a2001-03-11 01:49:19 +0000183 { "preferredauthentications", oPreferredAuthentications },
Ben Lindstrom982dbbc2001-04-17 18:11:36 +0000184 { "hostkeyalgorithms", oHostKeyAlgorithms },
Ben Lindstrome0f88042001-04-30 13:06:24 +0000185 { "bindaddress", oBindAddress },
Ben Lindstromae996bf2001-08-06 21:27:53 +0000186 { "smartcarddevice", oSmartcardDevice },
Damien Miller95def091999-11-25 00:26:21 +1100187 { NULL, 0 }
Damien Miller5ce662a1999-11-11 17:57:39 +1100188};
189
Damien Miller5428f641999-11-25 11:54:57 +1100190/*
191 * Adds a local TCP/IP port forward to options. Never returns if there is an
192 * error.
193 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000194
Damien Miller4af51302000-04-16 11:18:38 +1000195void
Damien Milleraae6c611999-12-06 11:47:28 +1100196add_local_forward(Options *options, u_short port, const char *host,
197 u_short host_port)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000198{
Damien Miller95def091999-11-25 00:26:21 +1100199 Forward *fwd;
Damien Millerbac2d8a2000-09-05 16:13:06 +1100200#ifndef HAVE_CYGWIN
Damien Miller95def091999-11-25 00:26:21 +1100201 extern uid_t original_real_uid;
Damien Miller95def091999-11-25 00:26:21 +1100202 if (port < IPPORT_RESERVED && original_real_uid != 0)
Ben Lindstrom6df8ef42001-03-05 07:47:23 +0000203 fatal("Privileged ports can only be forwarded by root.");
Damien Millerbac2d8a2000-09-05 16:13:06 +1100204#endif
Damien Miller95def091999-11-25 00:26:21 +1100205 if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
206 fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
207 fwd = &options->local_forwards[options->num_local_forwards++];
208 fwd->port = port;
209 fwd->host = xstrdup(host);
210 fwd->host_port = host_port;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000211}
212
Damien Miller5428f641999-11-25 11:54:57 +1100213/*
214 * Adds a remote TCP/IP port forward to options. Never returns if there is
215 * an error.
216 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000217
Damien Miller4af51302000-04-16 11:18:38 +1000218void
Damien Milleraae6c611999-12-06 11:47:28 +1100219add_remote_forward(Options *options, u_short port, const char *host,
220 u_short host_port)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000221{
Damien Miller95def091999-11-25 00:26:21 +1100222 Forward *fwd;
223 if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
224 fatal("Too many remote forwards (max %d).",
225 SSH_MAX_FORWARDS_PER_DIRECTION);
226 fwd = &options->remote_forwards[options->num_remote_forwards++];
227 fwd->port = port;
228 fwd->host = xstrdup(host);
229 fwd->host_port = host_port;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000230}
231
Damien Miller5428f641999-11-25 11:54:57 +1100232/*
Ben Lindstrom3704c262001-04-02 18:20:03 +0000233 * Returns the number of the token pointed to by cp or oBadOption.
Damien Miller5428f641999-11-25 11:54:57 +1100234 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000235
Damien Miller4af51302000-04-16 11:18:38 +1000236static OpCodes
Damien Miller95def091999-11-25 00:26:21 +1100237parse_token(const char *cp, const char *filename, int linenum)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000238{
Ben Lindstrom46c16222000-12-22 01:43:59 +0000239 u_int i;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000240
Damien Miller95def091999-11-25 00:26:21 +1100241 for (i = 0; keywords[i].name; i++)
Damien Miller5428f641999-11-25 11:54:57 +1100242 if (strcasecmp(cp, keywords[i].name) == 0)
Damien Miller95def091999-11-25 00:26:21 +1100243 return keywords[i].opcode;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000244
Ben Lindstromb5cdc662001-04-16 02:13:26 +0000245 error("%s: line %d: Bad configuration option: %s",
246 filename, linenum, cp);
Damien Miller95def091999-11-25 00:26:21 +1100247 return oBadOption;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000248}
249
Damien Miller5428f641999-11-25 11:54:57 +1100250/*
251 * Processes a single option line as used in the configuration files. This
252 * only sets those values that have not already been set.
253 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000254
Damien Miller2ccf6611999-11-15 15:25:10 +1100255int
256process_config_line(Options *options, const char *host,
Damien Miller95def091999-11-25 00:26:21 +1100257 char *line, const char *filename, int linenum,
258 int *activep)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000259{
Ben Lindstromc88785e2001-08-06 20:47:23 +0000260 char buf[256], *s, *string = NULL, **charptr, *endofnumber, *keyword,
261 *arg;
Damien Milleraae6c611999-12-06 11:47:28 +1100262 int opcode, *intptr, value;
263 u_short fwd_port, fwd_host_port;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000264
Damien Millerbe484b52000-07-15 14:14:16 +1000265 s = line;
266 /* Get the keyword. (Each line is supposed to begin with a keyword). */
267 keyword = strdelim(&s);
268 /* Ignore leading whitespace. */
269 if (*keyword == '\0')
270 keyword = strdelim(&s);
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000271 if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
Damien Miller95def091999-11-25 00:26:21 +1100272 return 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000273
Damien Miller37023962000-07-11 17:31:38 +1000274 opcode = parse_token(keyword, filename, linenum);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000275
Damien Miller95def091999-11-25 00:26:21 +1100276 switch (opcode) {
277 case oBadOption:
Damien Miller5428f641999-11-25 11:54:57 +1100278 /* don't panic, but count bad options */
279 return -1;
Damien Miller95def091999-11-25 00:26:21 +1100280 /* NOTREACHED */
281 case oForwardAgent:
282 intptr = &options->forward_agent;
283parse_flag:
Damien Millerbe484b52000-07-15 14:14:16 +1000284 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000285 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100286 fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
287 value = 0; /* To avoid compiler warning... */
Damien Miller37023962000-07-11 17:31:38 +1000288 if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
Damien Miller95def091999-11-25 00:26:21 +1100289 value = 1;
Damien Miller37023962000-07-11 17:31:38 +1000290 else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
Damien Miller95def091999-11-25 00:26:21 +1100291 value = 0;
292 else
293 fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
294 if (*activep && *intptr == -1)
295 *intptr = value;
296 break;
297
298 case oForwardX11:
299 intptr = &options->forward_x11;
300 goto parse_flag;
301
302 case oGatewayPorts:
303 intptr = &options->gateway_ports;
304 goto parse_flag;
305
306 case oUsePrivilegedPort:
307 intptr = &options->use_privileged_port;
308 goto parse_flag;
309
310 case oRhostsAuthentication:
311 intptr = &options->rhosts_authentication;
312 goto parse_flag;
313
314 case oPasswordAuthentication:
315 intptr = &options->password_authentication;
316 goto parse_flag;
317
Damien Miller874d77b2000-10-14 16:23:11 +1100318 case oKbdInteractiveAuthentication:
319 intptr = &options->kbd_interactive_authentication;
320 goto parse_flag;
321
322 case oKbdInteractiveDevices:
323 charptr = &options->kbd_interactive_devices;
324 goto parse_string;
325
Damien Miller0bc1bd82000-11-13 22:57:25 +1100326 case oPubkeyAuthentication:
327 intptr = &options->pubkey_authentication;
Damien Millere247cc42000-05-07 12:03:14 +1000328 goto parse_flag;
329
Damien Miller95def091999-11-25 00:26:21 +1100330 case oRSAAuthentication:
331 intptr = &options->rsa_authentication;
332 goto parse_flag;
333
334 case oRhostsRSAAuthentication:
335 intptr = &options->rhosts_rsa_authentication;
336 goto parse_flag;
337
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000338 case oHostbasedAuthentication:
339 intptr = &options->hostbased_authentication;
340 goto parse_flag;
341
Ben Lindstrom95fb2dd2001-01-23 03:12:10 +0000342 case oChallengeResponseAuthentication:
Ben Lindstrom551ea372001-06-05 18:56:16 +0000343 intptr = &options->challenge_response_authentication;
Damien Miller95def091999-11-25 00:26:21 +1100344 goto parse_flag;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000345#if defined(KRB4) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100346 case oKerberosAuthentication:
347 intptr = &options->kerberos_authentication;
348 goto parse_flag;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000349#endif
350#if defined(AFS) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100351 case oKerberosTgtPassing:
352 intptr = &options->kerberos_tgt_passing;
353 goto parse_flag;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000354#endif
355#ifdef AFS
Damien Miller95def091999-11-25 00:26:21 +1100356 case oAFSTokenPassing:
357 intptr = &options->afs_token_passing;
358 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000359#endif
Damien Miller95def091999-11-25 00:26:21 +1100360 case oFallBackToRsh:
361 intptr = &options->fallback_to_rsh;
362 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000363
Damien Miller95def091999-11-25 00:26:21 +1100364 case oUseRsh:
365 intptr = &options->use_rsh;
366 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000367
Damien Miller95def091999-11-25 00:26:21 +1100368 case oBatchMode:
369 intptr = &options->batch_mode;
370 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000371
Damien Miller95def091999-11-25 00:26:21 +1100372 case oCheckHostIP:
373 intptr = &options->check_host_ip;
374 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000375
Damien Miller95def091999-11-25 00:26:21 +1100376 case oStrictHostKeyChecking:
377 intptr = &options->strict_host_key_checking;
Damien Millerbe484b52000-07-15 14:14:16 +1000378 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000379 if (!arg || *arg == '\0')
Ben Lindstrom5ed8acd2001-01-29 08:00:54 +0000380 fatal("%.200s line %d: Missing yes/no/ask argument.",
Damien Miller95def091999-11-25 00:26:21 +1100381 filename, linenum);
382 value = 0; /* To avoid compiler warning... */
Damien Miller37023962000-07-11 17:31:38 +1000383 if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
Damien Miller95def091999-11-25 00:26:21 +1100384 value = 1;
Damien Miller37023962000-07-11 17:31:38 +1000385 else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
Damien Miller95def091999-11-25 00:26:21 +1100386 value = 0;
Damien Miller37023962000-07-11 17:31:38 +1000387 else if (strcmp(arg, "ask") == 0)
Damien Miller95def091999-11-25 00:26:21 +1100388 value = 2;
389 else
390 fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
391 if (*activep && *intptr == -1)
392 *intptr = value;
393 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000394
Damien Miller95def091999-11-25 00:26:21 +1100395 case oCompression:
396 intptr = &options->compression;
397 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000398
Damien Miller95def091999-11-25 00:26:21 +1100399 case oKeepAlives:
400 intptr = &options->keepalives;
401 goto parse_flag;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000402
Damien Miller95def091999-11-25 00:26:21 +1100403 case oNumberOfPasswordPrompts:
404 intptr = &options->number_of_password_prompts;
405 goto parse_int;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000406
Damien Miller95def091999-11-25 00:26:21 +1100407 case oCompressionLevel:
408 intptr = &options->compression_level;
409 goto parse_int;
410
411 case oIdentityFile:
Damien Millerbe484b52000-07-15 14:14:16 +1000412 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000413 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100414 fatal("%.200s line %d: Missing argument.", filename, linenum);
415 if (*activep) {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100416 intptr = &options->num_identity_files;
Damien Millereba71ba2000-04-29 23:57:08 +1000417 if (*intptr >= SSH_MAX_IDENTITY_FILES)
Damien Miller95def091999-11-25 00:26:21 +1100418 fatal("%.200s line %d: Too many identity files specified (max %d).",
419 filename, linenum, SSH_MAX_IDENTITY_FILES);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100420 charptr = &options->identity_files[*intptr];
Damien Miller37023962000-07-11 17:31:38 +1000421 *charptr = xstrdup(arg);
Damien Millereba71ba2000-04-29 23:57:08 +1000422 *intptr = *intptr + 1;
Damien Miller95def091999-11-25 00:26:21 +1100423 }
424 break;
425
Damien Millerd3a18572000-06-07 19:55:44 +1000426 case oXAuthLocation:
427 charptr=&options->xauth_location;
428 goto parse_string;
429
Damien Miller95def091999-11-25 00:26:21 +1100430 case oUser:
431 charptr = &options->user;
432parse_string:
Damien Millerbe484b52000-07-15 14:14:16 +1000433 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000434 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100435 fatal("%.200s line %d: Missing argument.", filename, linenum);
436 if (*activep && *charptr == NULL)
Damien Miller37023962000-07-11 17:31:38 +1000437 *charptr = xstrdup(arg);
Damien Miller95def091999-11-25 00:26:21 +1100438 break;
439
440 case oGlobalKnownHostsFile:
441 charptr = &options->system_hostfile;
442 goto parse_string;
443
444 case oUserKnownHostsFile:
445 charptr = &options->user_hostfile;
446 goto parse_string;
447
Damien Millereba71ba2000-04-29 23:57:08 +1000448 case oGlobalKnownHostsFile2:
449 charptr = &options->system_hostfile2;
450 goto parse_string;
451
452 case oUserKnownHostsFile2:
453 charptr = &options->user_hostfile2;
454 goto parse_string;
455
Damien Miller95def091999-11-25 00:26:21 +1100456 case oHostName:
457 charptr = &options->hostname;
458 goto parse_string;
459
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000460 case oHostKeyAlias:
461 charptr = &options->host_key_alias;
462 goto parse_string;
463
Ben Lindstromb9be60a2001-03-11 01:49:19 +0000464 case oPreferredAuthentications:
465 charptr = &options->preferred_authentications;
466 goto parse_string;
467
Ben Lindstrome0f88042001-04-30 13:06:24 +0000468 case oBindAddress:
469 charptr = &options->bind_address;
470 goto parse_string;
471
Ben Lindstromae996bf2001-08-06 21:27:53 +0000472 case oSmartcardDevice:
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000473 charptr = &options->smartcard_device;
474 goto parse_string;
Ben Lindstromae996bf2001-08-06 21:27:53 +0000475
Damien Miller95def091999-11-25 00:26:21 +1100476 case oProxyCommand:
477 charptr = &options->proxy_command;
Damien Millerbe484b52000-07-15 14:14:16 +1000478 while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
Damien Miller37023962000-07-11 17:31:38 +1000479 string = xrealloc(string, strlen(string) + strlen(arg) + 2);
Damien Miller95def091999-11-25 00:26:21 +1100480 strcat(string, " ");
Damien Miller37023962000-07-11 17:31:38 +1000481 strcat(string, arg);
Damien Miller95def091999-11-25 00:26:21 +1100482 }
483 if (*activep && *charptr == NULL)
484 *charptr = string;
485 else
486 xfree(string);
487 return 0;
488
489 case oPort:
490 intptr = &options->port;
491parse_int:
Damien Millerbe484b52000-07-15 14:14:16 +1000492 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000493 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100494 fatal("%.200s line %d: Missing argument.", filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000495 if (arg[0] < '0' || arg[0] > '9')
Damien Miller95def091999-11-25 00:26:21 +1100496 fatal("%.200s line %d: Bad number.", filename, linenum);
Damien Miller5428f641999-11-25 11:54:57 +1100497
498 /* Octal, decimal, or hex format? */
Damien Miller37023962000-07-11 17:31:38 +1000499 value = strtol(arg, &endofnumber, 0);
500 if (arg == endofnumber)
Damien Miller5428f641999-11-25 11:54:57 +1100501 fatal("%.200s line %d: Bad number.", filename, linenum);
Damien Miller95def091999-11-25 00:26:21 +1100502 if (*activep && *intptr == -1)
503 *intptr = value;
504 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000505
Damien Miller95def091999-11-25 00:26:21 +1100506 case oConnectionAttempts:
507 intptr = &options->connection_attempts;
508 goto parse_int;
Damien Miller5ce662a1999-11-11 17:57:39 +1100509
Damien Miller95def091999-11-25 00:26:21 +1100510 case oCipher:
511 intptr = &options->cipher;
Damien Millerbe484b52000-07-15 14:14:16 +1000512 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000513 if (!arg || *arg == '\0')
Damien Millerb1715dc2000-05-30 13:44:51 +1000514 fatal("%.200s line %d: Missing argument.", filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000515 value = cipher_number(arg);
Damien Miller95def091999-11-25 00:26:21 +1100516 if (value == -1)
517 fatal("%.200s line %d: Bad cipher '%s'.",
Damien Miller37023962000-07-11 17:31:38 +1000518 filename, linenum, arg ? arg : "<NONE>");
Damien Miller95def091999-11-25 00:26:21 +1100519 if (*activep && *intptr == -1)
520 *intptr = value;
521 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000522
Damien Miller78928792000-04-12 20:17:38 +1000523 case oCiphers:
Damien Millerbe484b52000-07-15 14:14:16 +1000524 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000525 if (!arg || *arg == '\0')
Damien Millerb1715dc2000-05-30 13:44:51 +1000526 fatal("%.200s line %d: Missing argument.", filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000527 if (!ciphers_valid(arg))
Damien Miller30c3d422000-05-09 11:02:59 +1000528 fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
Damien Miller37023962000-07-11 17:31:38 +1000529 filename, linenum, arg ? arg : "<NONE>");
Damien Miller78928792000-04-12 20:17:38 +1000530 if (*activep && options->ciphers == NULL)
Damien Miller37023962000-07-11 17:31:38 +1000531 options->ciphers = xstrdup(arg);
Damien Miller78928792000-04-12 20:17:38 +1000532 break;
533
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000534 case oMacs:
535 arg = strdelim(&s);
536 if (!arg || *arg == '\0')
537 fatal("%.200s line %d: Missing argument.", filename, linenum);
538 if (!mac_valid(arg))
539 fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
540 filename, linenum, arg ? arg : "<NONE>");
541 if (*activep && options->macs == NULL)
542 options->macs = xstrdup(arg);
543 break;
544
Ben Lindstrom982dbbc2001-04-17 18:11:36 +0000545 case oHostKeyAlgorithms:
546 arg = strdelim(&s);
547 if (!arg || *arg == '\0')
548 fatal("%.200s line %d: Missing argument.", filename, linenum);
549 if (!key_names_valid2(arg))
550 fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
551 filename, linenum, arg ? arg : "<NONE>");
552 if (*activep && options->hostkeyalgorithms == NULL)
553 options->hostkeyalgorithms = xstrdup(arg);
554 break;
555
Damien Miller78928792000-04-12 20:17:38 +1000556 case oProtocol:
557 intptr = &options->protocol;
Damien Millerbe484b52000-07-15 14:14:16 +1000558 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000559 if (!arg || *arg == '\0')
Damien Millerb1715dc2000-05-30 13:44:51 +1000560 fatal("%.200s line %d: Missing argument.", filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000561 value = proto_spec(arg);
Damien Miller78928792000-04-12 20:17:38 +1000562 if (value == SSH_PROTO_UNKNOWN)
563 fatal("%.200s line %d: Bad protocol spec '%s'.",
Damien Miller37023962000-07-11 17:31:38 +1000564 filename, linenum, arg ? arg : "<NONE>");
Damien Miller78928792000-04-12 20:17:38 +1000565 if (*activep && *intptr == SSH_PROTO_UNKNOWN)
566 *intptr = value;
567 break;
568
Damien Miller95def091999-11-25 00:26:21 +1100569 case oLogLevel:
570 intptr = (int *) &options->log_level;
Damien Millerbe484b52000-07-15 14:14:16 +1000571 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000572 value = log_level_number(arg);
Damien Miller95def091999-11-25 00:26:21 +1100573 if (value == (LogLevel) - 1)
Ben Lindstrom6df8ef42001-03-05 07:47:23 +0000574 fatal("%.200s line %d: unsupported log level '%s'",
Damien Miller37023962000-07-11 17:31:38 +1000575 filename, linenum, arg ? arg : "<NONE>");
Damien Miller95def091999-11-25 00:26:21 +1100576 if (*activep && (LogLevel) * intptr == -1)
577 *intptr = (LogLevel) value;
578 break;
579
580 case oRemoteForward:
Damien Millerbe484b52000-07-15 14:14:16 +1000581 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000582 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100583 fatal("%.200s line %d: Missing argument.", filename, linenum);
Ben Lindstrom19066a12001-04-12 23:39:26 +0000584 fwd_port = a2port(arg);
585 if (fwd_port == 0)
Damien Miller95def091999-11-25 00:26:21 +1100586 fatal("%.200s line %d: Badly formatted port number.",
587 filename, linenum);
Damien Millerbe484b52000-07-15 14:14:16 +1000588 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000589 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100590 fatal("%.200s line %d: Missing second argument.",
591 filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000592 if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
Damien Miller95def091999-11-25 00:26:21 +1100593 fatal("%.200s line %d: Badly formatted host:port.",
594 filename, linenum);
595 if (*activep)
596 add_remote_forward(options, fwd_port, buf, fwd_host_port);
597 break;
598
599 case oLocalForward:
Damien Millerbe484b52000-07-15 14:14:16 +1000600 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000601 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100602 fatal("%.200s line %d: Missing argument.", filename, linenum);
Ben Lindstrom19066a12001-04-12 23:39:26 +0000603 fwd_port = a2port(arg);
604 if (fwd_port == 0)
Damien Miller95def091999-11-25 00:26:21 +1100605 fatal("%.200s line %d: Badly formatted port number.",
606 filename, linenum);
Damien Millerbe484b52000-07-15 14:14:16 +1000607 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000608 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100609 fatal("%.200s line %d: Missing second argument.",
610 filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000611 if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
Damien Miller95def091999-11-25 00:26:21 +1100612 fatal("%.200s line %d: Badly formatted host:port.",
613 filename, linenum);
614 if (*activep)
615 add_local_forward(options, fwd_port, buf, fwd_host_port);
616 break;
617
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000618 case oDynamicForward:
619 arg = strdelim(&s);
620 if (!arg || *arg == '\0')
621 fatal("%.200s line %d: Missing port argument.",
622 filename, linenum);
Ben Lindstrom19066a12001-04-12 23:39:26 +0000623 fwd_port = a2port(arg);
624 if (fwd_port == 0)
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000625 fatal("%.200s line %d: Badly formatted port number.",
626 filename, linenum);
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000627 add_local_forward(options, fwd_port, "socks4", 0);
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000628 break;
Ben Lindstrom3bb4f9d2001-04-08 18:30:26 +0000629
Damien Miller95def091999-11-25 00:26:21 +1100630 case oHost:
631 *activep = 0;
Damien Millerbe484b52000-07-15 14:14:16 +1000632 while ((arg = strdelim(&s)) != NULL && *arg != '\0')
Damien Miller37023962000-07-11 17:31:38 +1000633 if (match_pattern(host, arg)) {
634 debug("Applying options for %.100s", arg);
Damien Miller95def091999-11-25 00:26:21 +1100635 *activep = 1;
636 break;
637 }
Damien Millerbe484b52000-07-15 14:14:16 +1000638 /* Avoid garbage check below, as strdelim is done. */
Damien Miller95def091999-11-25 00:26:21 +1100639 return 0;
640
641 case oEscapeChar:
642 intptr = &options->escape_char;
Damien Millerbe484b52000-07-15 14:14:16 +1000643 arg = strdelim(&s);
Damien Miller37023962000-07-11 17:31:38 +1000644 if (!arg || *arg == '\0')
Damien Miller95def091999-11-25 00:26:21 +1100645 fatal("%.200s line %d: Missing argument.", filename, linenum);
Damien Miller37023962000-07-11 17:31:38 +1000646 if (arg[0] == '^' && arg[2] == 0 &&
Ben Lindstrom46c16222000-12-22 01:43:59 +0000647 (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
648 value = (u_char) arg[1] & 31;
Damien Miller37023962000-07-11 17:31:38 +1000649 else if (strlen(arg) == 1)
Ben Lindstrom46c16222000-12-22 01:43:59 +0000650 value = (u_char) arg[0];
Damien Miller37023962000-07-11 17:31:38 +1000651 else if (strcmp(arg, "none") == 0)
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000652 value = SSH_ESCAPECHAR_NONE;
Damien Miller95def091999-11-25 00:26:21 +1100653 else {
654 fatal("%.200s line %d: Bad escape character.",
655 filename, linenum);
656 /* NOTREACHED */
657 value = 0; /* Avoid compiler warning. */
658 }
659 if (*activep && *intptr == -1)
660 *intptr = value;
661 break;
662
663 default:
664 fatal("process_config_line: Unimplemented opcode %d", opcode);
665 }
666
667 /* Check that there is no garbage at end of line. */
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000668 if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
Damien Miller37023962000-07-11 17:31:38 +1000669 fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
670 filename, linenum, arg);
671 }
Damien Miller95def091999-11-25 00:26:21 +1100672 return 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000673}
674
675
Damien Miller5428f641999-11-25 11:54:57 +1100676/*
677 * Reads the config file and modifies the options accordingly. Options
678 * should already be initialized before this call. This never returns if
679 * there is an error. If the file does not exist, this returns immediately.
680 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000681
Damien Miller4af51302000-04-16 11:18:38 +1000682void
Damien Miller95def091999-11-25 00:26:21 +1100683read_config_file(const char *filename, const char *host, Options *options)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000684{
Damien Miller95def091999-11-25 00:26:21 +1100685 FILE *f;
686 char line[1024];
687 int active, linenum;
688 int bad_options = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000689
Damien Miller95def091999-11-25 00:26:21 +1100690 /* Open the file. */
691 f = fopen(filename, "r");
692 if (!f)
693 return;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000694
Damien Miller95def091999-11-25 00:26:21 +1100695 debug("Reading configuration data %.200s", filename);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000696
Damien Miller5428f641999-11-25 11:54:57 +1100697 /*
698 * Mark that we are now processing the options. This flag is turned
699 * on/off by Host specifications.
700 */
Damien Miller95def091999-11-25 00:26:21 +1100701 active = 1;
702 linenum = 0;
703 while (fgets(line, sizeof(line), f)) {
704 /* Update line number counter. */
705 linenum++;
706 if (process_config_line(options, host, line, filename, linenum, &active) != 0)
707 bad_options++;
708 }
709 fclose(f);
710 if (bad_options > 0)
Ben Lindstrom6df8ef42001-03-05 07:47:23 +0000711 fatal("%s: terminating, %d bad configuration options",
Damien Miller95def091999-11-25 00:26:21 +1100712 filename, bad_options);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000713}
714
Damien Miller5428f641999-11-25 11:54:57 +1100715/*
716 * Initializes options to special values that indicate that they have not yet
717 * been set. Read_config_file will only set options with this value. Options
718 * are processed in the following order: command line, user config file,
719 * system config file. Last, fill_default_options is called.
720 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000721
Damien Miller4af51302000-04-16 11:18:38 +1000722void
Damien Miller95def091999-11-25 00:26:21 +1100723initialize_options(Options * options)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000724{
Damien Miller95def091999-11-25 00:26:21 +1100725 memset(options, 'X', sizeof(*options));
726 options->forward_agent = -1;
727 options->forward_x11 = -1;
Damien Millerd3a18572000-06-07 19:55:44 +1000728 options->xauth_location = NULL;
Damien Miller95def091999-11-25 00:26:21 +1100729 options->gateway_ports = -1;
730 options->use_privileged_port = -1;
731 options->rhosts_authentication = -1;
732 options->rsa_authentication = -1;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100733 options->pubkey_authentication = -1;
Ben Lindstrom551ea372001-06-05 18:56:16 +0000734 options->challenge_response_authentication = -1;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000735#if defined(KRB4) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100736 options->kerberos_authentication = -1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000737#endif
Ben Lindstromec95ed92001-07-04 04:21:14 +0000738#if defined(AFS) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100739 options->kerberos_tgt_passing = -1;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000740#endif
741#ifdef AFS
Damien Miller95def091999-11-25 00:26:21 +1100742 options->afs_token_passing = -1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000743#endif
Damien Miller95def091999-11-25 00:26:21 +1100744 options->password_authentication = -1;
Damien Miller874d77b2000-10-14 16:23:11 +1100745 options->kbd_interactive_authentication = -1;
746 options->kbd_interactive_devices = NULL;
Damien Miller95def091999-11-25 00:26:21 +1100747 options->rhosts_rsa_authentication = -1;
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000748 options->hostbased_authentication = -1;
Damien Miller95def091999-11-25 00:26:21 +1100749 options->fallback_to_rsh = -1;
750 options->use_rsh = -1;
751 options->batch_mode = -1;
752 options->check_host_ip = -1;
753 options->strict_host_key_checking = -1;
754 options->compression = -1;
755 options->keepalives = -1;
756 options->compression_level = -1;
757 options->port = -1;
758 options->connection_attempts = -1;
759 options->number_of_password_prompts = -1;
760 options->cipher = -1;
Damien Miller78928792000-04-12 20:17:38 +1000761 options->ciphers = NULL;
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000762 options->macs = NULL;
Ben Lindstrom982dbbc2001-04-17 18:11:36 +0000763 options->hostkeyalgorithms = NULL;
Damien Miller78928792000-04-12 20:17:38 +1000764 options->protocol = SSH_PROTO_UNKNOWN;
Damien Miller95def091999-11-25 00:26:21 +1100765 options->num_identity_files = 0;
766 options->hostname = NULL;
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000767 options->host_key_alias = NULL;
Damien Miller95def091999-11-25 00:26:21 +1100768 options->proxy_command = NULL;
769 options->user = NULL;
770 options->escape_char = -1;
771 options->system_hostfile = NULL;
772 options->user_hostfile = NULL;
Damien Millereba71ba2000-04-29 23:57:08 +1000773 options->system_hostfile2 = NULL;
774 options->user_hostfile2 = NULL;
Damien Miller95def091999-11-25 00:26:21 +1100775 options->num_local_forwards = 0;
776 options->num_remote_forwards = 0;
777 options->log_level = (LogLevel) - 1;
Ben Lindstromb9be60a2001-03-11 01:49:19 +0000778 options->preferred_authentications = NULL;
Ben Lindstrome0f88042001-04-30 13:06:24 +0000779 options->bind_address = NULL;
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000780 options->smartcard_device = NULL;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000781}
782
Damien Miller5428f641999-11-25 11:54:57 +1100783/*
784 * Called after processing other sources of option data, this fills those
785 * options for which no value has been specified with their default values.
786 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000787
Damien Miller4af51302000-04-16 11:18:38 +1000788void
Damien Miller95def091999-11-25 00:26:21 +1100789fill_default_options(Options * options)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000790{
Ben Lindstrom4f7a64a2001-02-10 22:50:09 +0000791 int len;
792
Damien Miller95def091999-11-25 00:26:21 +1100793 if (options->forward_agent == -1)
Damien Millerb1715dc2000-05-30 13:44:51 +1000794 options->forward_agent = 0;
Damien Miller95def091999-11-25 00:26:21 +1100795 if (options->forward_x11 == -1)
Damien Miller98c7ad62000-03-09 21:27:49 +1100796 options->forward_x11 = 0;
Ben Lindstrom1bf11f62001-06-09 01:48:01 +0000797#ifdef _PATH_XAUTH
Damien Millerd3a18572000-06-07 19:55:44 +1000798 if (options->xauth_location == NULL)
Ben Lindstrom1bf11f62001-06-09 01:48:01 +0000799 options->xauth_location = _PATH_XAUTH;
800#endif
Damien Miller95def091999-11-25 00:26:21 +1100801 if (options->gateway_ports == -1)
802 options->gateway_ports = 0;
803 if (options->use_privileged_port == -1)
Ben Lindstromcebc8582001-03-08 03:39:10 +0000804 options->use_privileged_port = 0;
Damien Miller95def091999-11-25 00:26:21 +1100805 if (options->rhosts_authentication == -1)
806 options->rhosts_authentication = 1;
807 if (options->rsa_authentication == -1)
808 options->rsa_authentication = 1;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100809 if (options->pubkey_authentication == -1)
810 options->pubkey_authentication = 1;
Ben Lindstrom551ea372001-06-05 18:56:16 +0000811 if (options->challenge_response_authentication == -1)
Ben Lindstrom0076d752001-08-06 20:53:26 +0000812 options->challenge_response_authentication = 1;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000813#if defined(KRB4) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100814 if (options->kerberos_authentication == -1)
815 options->kerberos_authentication = 1;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000816#endif
817#if defined(AFS) || defined(KRB5)
Damien Miller95def091999-11-25 00:26:21 +1100818 if (options->kerberos_tgt_passing == -1)
819 options->kerberos_tgt_passing = 1;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000820#endif
821#ifdef AFS
Damien Miller95def091999-11-25 00:26:21 +1100822 if (options->afs_token_passing == -1)
823 options->afs_token_passing = 1;
Ben Lindstromec95ed92001-07-04 04:21:14 +0000824#endif
Damien Miller95def091999-11-25 00:26:21 +1100825 if (options->password_authentication == -1)
826 options->password_authentication = 1;
Damien Miller874d77b2000-10-14 16:23:11 +1100827 if (options->kbd_interactive_authentication == -1)
Ben Lindstrom95fb2dd2001-01-23 03:12:10 +0000828 options->kbd_interactive_authentication = 1;
Damien Miller95def091999-11-25 00:26:21 +1100829 if (options->rhosts_rsa_authentication == -1)
830 options->rhosts_rsa_authentication = 1;
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000831 if (options->hostbased_authentication == -1)
832 options->hostbased_authentication = 0;
Damien Miller95def091999-11-25 00:26:21 +1100833 if (options->fallback_to_rsh == -1)
Damien Miller182ee6e2000-07-12 09:45:27 +1000834 options->fallback_to_rsh = 0;
Damien Miller95def091999-11-25 00:26:21 +1100835 if (options->use_rsh == -1)
836 options->use_rsh = 0;
837 if (options->batch_mode == -1)
838 options->batch_mode = 0;
839 if (options->check_host_ip == -1)
840 options->check_host_ip = 1;
841 if (options->strict_host_key_checking == -1)
842 options->strict_host_key_checking = 2; /* 2 is default */
843 if (options->compression == -1)
844 options->compression = 0;
845 if (options->keepalives == -1)
846 options->keepalives = 1;
847 if (options->compression_level == -1)
848 options->compression_level = 6;
849 if (options->port == -1)
850 options->port = 0; /* Filled in ssh_connect. */
851 if (options->connection_attempts == -1)
Ben Lindstromf9cedb92001-08-06 21:07:11 +0000852 options->connection_attempts = 1;
Damien Miller95def091999-11-25 00:26:21 +1100853 if (options->number_of_password_prompts == -1)
854 options->number_of_password_prompts = 3;
855 /* Selected in ssh_login(). */
856 if (options->cipher == -1)
857 options->cipher = SSH_CIPHER_NOT_SET;
Damien Miller30c3d422000-05-09 11:02:59 +1000858 /* options->ciphers, default set in myproposals.h */
Ben Lindstrom06b33aa2001-02-15 03:01:59 +0000859 /* options->macs, default set in myproposals.h */
Ben Lindstrom982dbbc2001-04-17 18:11:36 +0000860 /* options->hostkeyalgorithms, default set in myproposals.h */
Damien Miller78928792000-04-12 20:17:38 +1000861 if (options->protocol == SSH_PROTO_UNKNOWN)
Ben Lindstrom6b776432001-03-22 01:24:04 +0000862 options->protocol = SSH_PROTO_1|SSH_PROTO_2;
Damien Miller95def091999-11-25 00:26:21 +1100863 if (options->num_identity_files == 0) {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100864 if (options->protocol & SSH_PROTO_1) {
Ben Lindstrom4f7a64a2001-02-10 22:50:09 +0000865 len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100866 options->identity_files[options->num_identity_files] =
Ben Lindstrom4f7a64a2001-02-10 22:50:09 +0000867 xmalloc(len);
868 snprintf(options->identity_files[options->num_identity_files++],
869 len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100870 }
871 if (options->protocol & SSH_PROTO_2) {
Ben Lindstromb00d4fb2001-03-05 06:03:03 +0000872 len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
873 options->identity_files[options->num_identity_files] =
874 xmalloc(len);
875 snprintf(options->identity_files[options->num_identity_files++],
876 len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
877
Ben Lindstrom4f7a64a2001-02-10 22:50:09 +0000878 len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100879 options->identity_files[options->num_identity_files] =
Ben Lindstrom4f7a64a2001-02-10 22:50:09 +0000880 xmalloc(len);
881 snprintf(options->identity_files[options->num_identity_files++],
882 len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100883 }
Damien Millereba71ba2000-04-29 23:57:08 +1000884 }
Damien Miller95def091999-11-25 00:26:21 +1100885 if (options->escape_char == -1)
886 options->escape_char = '~';
887 if (options->system_hostfile == NULL)
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000888 options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
Damien Miller95def091999-11-25 00:26:21 +1100889 if (options->user_hostfile == NULL)
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000890 options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
Damien Millereba71ba2000-04-29 23:57:08 +1000891 if (options->system_hostfile2 == NULL)
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000892 options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
Damien Millereba71ba2000-04-29 23:57:08 +1000893 if (options->user_hostfile2 == NULL)
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000894 options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
Damien Miller95def091999-11-25 00:26:21 +1100895 if (options->log_level == (LogLevel) - 1)
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000896 options->log_level = SYSLOG_LEVEL_INFO;
Damien Miller95def091999-11-25 00:26:21 +1100897 /* options->proxy_command should not be set by default */
898 /* options->user will be set in the main program if appropriate */
899 /* options->hostname will be set in the main program if appropriate */
Ben Lindstrom4dccfa52000-12-28 16:40:05 +0000900 /* options->host_key_alias should not be set by default */
Ben Lindstromb9be60a2001-03-11 01:49:19 +0000901 /* options->preferred_authentications will be set in ssh */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000902}