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fe7dba42 | 1 | /* $OpenBSD: readconf.c,v 1.179 2009/10/28 16:38:18 reyk Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
5 | * All rights reserved | |
5260325f | 6 | * Functions for reading the configuration files. |
6ae2364d | 7 | * |
bcbf86ec | 8 | * As far as I am concerned, the code I have written for this software |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 13 | */ |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
4095f623 | 16 | |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
9794d008 | 19 | #include <sys/socket.h> |
20 | ||
21 | #include <netinet/in.h> | |
8efc0c15 | 22 | |
b6438382 | 23 | #include <ctype.h> |
028094f4 | 24 | #include <errno.h> |
28cb0a43 | 25 | #include <netdb.h> |
31652869 | 26 | #include <signal.h> |
24436b92 | 27 | #include <stdarg.h> |
cf851879 | 28 | #include <stdio.h> |
00146caa | 29 | #include <string.h> |
5188ba17 | 30 | #include <unistd.h> |
b6438382 | 31 | |
8efc0c15 | 32 | #include "xmalloc.h" |
31652869 | 33 | #include "ssh.h" |
a8be9f80 | 34 | #include "compat.h" |
42f11eb2 | 35 | #include "cipher.h" |
36 | #include "pathnames.h" | |
37 | #include "log.h" | |
31652869 | 38 | #include "key.h" |
42f11eb2 | 39 | #include "readconf.h" |
40 | #include "match.h" | |
41 | #include "misc.h" | |
31652869 | 42 | #include "buffer.h" |
b2552997 | 43 | #include "kex.h" |
44 | #include "mac.h" | |
8efc0c15 | 45 | |
46 | /* Format of the configuration file: | |
47 | ||
48 | # Configuration data is parsed as follows: | |
49 | # 1. command line options | |
50 | # 2. user-specific file | |
51 | # 3. system-wide file | |
52 | # Any configuration value is only changed the first time it is set. | |
53 | # Thus, host-specific definitions should be at the beginning of the | |
54 | # configuration file, and defaults at the end. | |
55 | ||
56 | # Host-specific declarations. These may override anything above. A single | |
57 | # host may match multiple declarations; these are processed in the order | |
58 | # that they are given in. | |
59 | ||
60 | Host *.ngs.fi ngs.fi | |
80fcb74e | 61 | User foo |
8efc0c15 | 62 | |
63 | Host fake.com | |
64 | HostName another.host.name.real.org | |
65 | User blaah | |
66 | Port 34289 | |
67 | ForwardX11 no | |
68 | ForwardAgent no | |
69 | ||
70 | Host books.com | |
71 | RemoteForward 9999 shadows.cs.hut.fi:9999 | |
72 | Cipher 3des | |
73 | ||
74 | Host fascist.blob.com | |
75 | Port 23123 | |
76 | User tylonen | |
8efc0c15 | 77 | PasswordAuthentication no |
78 | ||
79 | Host puukko.hut.fi | |
80 | User t35124p | |
81 | ProxyCommand ssh-proxy %h %p | |
82 | ||
83 | Host *.fr | |
80fcb74e | 84 | PublicKeyAuthentication no |
8efc0c15 | 85 | |
86 | Host *.su | |
87 | Cipher none | |
88 | PasswordAuthentication no | |
89 | ||
d20f3c9e | 90 | Host vpn.fake.com |
91 | Tunnel yes | |
92 | TunnelDevice 3 | |
93 | ||
8efc0c15 | 94 | # Defaults for various options |
95 | Host * | |
96 | ForwardAgent no | |
fa08c86b | 97 | ForwardX11 no |
8efc0c15 | 98 | PasswordAuthentication yes |
99 | RSAAuthentication yes | |
100 | RhostsRSAAuthentication yes | |
8efc0c15 | 101 | StrictHostKeyChecking yes |
fd573618 | 102 | TcpKeepAlive no |
8efc0c15 | 103 | IdentityFile ~/.ssh/identity |
104 | Port 22 | |
105 | EscapeChar ~ | |
106 | ||
107 | */ | |
108 | ||
109 | /* Keyword tokens. */ | |
110 | ||
5260325f | 111 | typedef enum { |
112 | oBadOption, | |
d73a67d7 | 113 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
42ea6f5e | 114 | oExitOnForwardFailure, |
7203d6bb | 115 | oPasswordAuthentication, oRSAAuthentication, |
d464095c | 116 | oChallengeResponseAuthentication, oXAuthLocation, |
5260325f | 117 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
118 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
119 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
120 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
fd573618 | 121 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
b2552997 | 122 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
fa08c86b | 123 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
cab80f75 | 124 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, |
e961a8f9 | 125 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, |
e1c5bfaf | 126 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, |
80fcb74e | 127 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
09ab3296 | 128 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
7364bd04 | 129 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, |
3a065ed0 | 130 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
5c63c2ab | 131 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
d20f3c9e | 132 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
fe7dba42 | 133 | oVisualHostKey, oUseRoaming, oRDomain, |
134 | oZeroKnowledgePasswordAuthentication, oDeprecated, oUnsupported | |
8efc0c15 | 135 | } OpCodes; |
136 | ||
137 | /* Textual representations of the tokens. */ | |
138 | ||
5260325f | 139 | static struct { |
140 | const char *name; | |
141 | OpCodes opcode; | |
142 | } keywords[] = { | |
143 | { "forwardagent", oForwardAgent }, | |
144 | { "forwardx11", oForwardX11 }, | |
d73a67d7 | 145 | { "forwardx11trusted", oForwardX11Trusted }, |
42ea6f5e | 146 | { "exitonforwardfailure", oExitOnForwardFailure }, |
fa649821 | 147 | { "xauthlocation", oXAuthLocation }, |
5260325f | 148 | { "gatewayports", oGatewayPorts }, |
149 | { "useprivilegedport", oUsePrivilegedPort }, | |
0598d99d | 150 | { "rhostsauthentication", oDeprecated }, |
5260325f | 151 | { "passwordauthentication", oPasswordAuthentication }, |
94ec8c6b | 152 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
153 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
5260325f | 154 | { "rsaauthentication", oRSAAuthentication }, |
fa08c86b | 155 | { "pubkeyauthentication", oPubkeyAuthentication }, |
d464095c | 156 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
8002af61 | 157 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, |
0140e66a | 158 | { "hostbasedauthentication", oHostbasedAuthentication }, |
d464095c | 159 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, |
160 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
161 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
a2144546 | 162 | { "kerberosauthentication", oUnsupported }, |
163 | { "kerberostgtpassing", oUnsupported }, | |
a2144546 | 164 | { "afstokenpassing", oUnsupported }, |
7364bd04 | 165 | #if defined(GSSAPI) |
166 | { "gssapiauthentication", oGssAuthentication }, | |
7364bd04 | 167 | { "gssapidelegatecredentials", oGssDelegateCreds }, |
168 | #else | |
169 | { "gssapiauthentication", oUnsupported }, | |
170 | { "gssapidelegatecredentials", oUnsupported }, | |
171 | #endif | |
80fcb74e | 172 | { "fallbacktorsh", oDeprecated }, |
173 | { "usersh", oDeprecated }, | |
5260325f | 174 | { "identityfile", oIdentityFile }, |
9b4b86c2 | 175 | { "identityfile2", oIdentityFile }, /* obsolete */ |
3a065ed0 | 176 | { "identitiesonly", oIdentitiesOnly }, |
5260325f | 177 | { "hostname", oHostName }, |
8abcdba4 | 178 | { "hostkeyalias", oHostKeyAlias }, |
5260325f | 179 | { "proxycommand", oProxyCommand }, |
180 | { "port", oPort }, | |
181 | { "cipher", oCipher }, | |
a8be9f80 | 182 | { "ciphers", oCiphers }, |
b2552997 | 183 | { "macs", oMacs }, |
a8be9f80 | 184 | { "protocol", oProtocol }, |
5260325f | 185 | { "remoteforward", oRemoteForward }, |
186 | { "localforward", oLocalForward }, | |
187 | { "user", oUser }, | |
188 | { "host", oHost }, | |
189 | { "escapechar", oEscapeChar }, | |
5260325f | 190 | { "globalknownhostsfile", oGlobalKnownHostsFile }, |
9b4b86c2 | 191 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */ |
192 | { "userknownhostsfile", oUserKnownHostsFile }, | |
f49bc4f7 | 193 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ |
5260325f | 194 | { "connectionattempts", oConnectionAttempts }, |
195 | { "batchmode", oBatchMode }, | |
196 | { "checkhostip", oCheckHostIP }, | |
197 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
198 | { "compression", oCompression }, | |
199 | { "compressionlevel", oCompressionLevel }, | |
fd573618 | 200 | { "tcpkeepalive", oTCPKeepAlive }, |
201 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
5260325f | 202 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
5260325f | 203 | { "loglevel", oLogLevel }, |
0490e609 | 204 | { "dynamicforward", oDynamicForward }, |
cab80f75 | 205 | { "preferredauthentications", oPreferredAuthentications }, |
e961a8f9 | 206 | { "hostkeyalgorithms", oHostKeyAlgorithms }, |
3435f5a6 | 207 | { "bindaddress", oBindAddress }, |
a2144546 | 208 | #ifdef SMARTCARD |
eea098a3 | 209 | { "smartcarddevice", oSmartcardDevice }, |
a2144546 | 210 | #else |
211 | { "smartcarddevice", oUnsupported }, | |
212 | #endif | |
184eed6a | 213 | { "clearallforwardings", oClearAllForwardings }, |
cc46e2ee | 214 | { "enablesshkeysign", oEnableSSHKeysign }, |
21289cd0 | 215 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
184eed6a | 216 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
ffd7b36b | 217 | { "rekeylimit", oRekeyLimit }, |
09ab3296 | 218 | { "connecttimeout", oConnectTimeout }, |
f811e52a | 219 | { "addressfamily", oAddressFamily }, |
5d8d32a3 | 220 | { "serveraliveinterval", oServerAliveInterval }, |
221 | { "serveralivecountmax", oServerAliveCountMax }, | |
61a2c1da | 222 | { "sendenv", oSendEnv }, |
5e96b616 | 223 | { "controlpath", oControlPath }, |
224 | { "controlmaster", oControlMaster }, | |
5c63c2ab | 225 | { "hashknownhosts", oHashKnownHosts }, |
d20f3c9e | 226 | { "tunnel", oTunnel }, |
227 | { "tunneldevice", oTunnelDevice }, | |
228 | { "localcommand", oLocalCommand }, | |
229 | { "permitlocalcommand", oPermitLocalCommand }, | |
7b3999b8 | 230 | { "visualhostkey", oVisualHostKey }, |
94c0aea4 | 231 | { "useroaming", oUseRoaming }, |
fe7dba42 | 232 | { "rdomain", oRDomain }, |
5adf6b9a | 233 | #ifdef JPAKE |
234 | { "zeroknowledgepasswordauthentication", | |
235 | oZeroKnowledgePasswordAuthentication }, | |
236 | #else | |
237 | { "zeroknowledgepasswordauthentication", oUnsupported }, | |
238 | #endif | |
239 | ||
17a3011c | 240 | { NULL, oBadOption } |
6a17f9c2 | 241 | }; |
242 | ||
aa3378df | 243 | /* |
244 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
245 | * error. | |
246 | */ | |
8efc0c15 | 247 | |
6ae2364d | 248 | void |
3867aa0a | 249 | add_local_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 250 | { |
5260325f | 251 | Forward *fwd; |
e6f15ed1 | 252 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
5260325f | 253 | extern uid_t original_real_uid; |
3867aa0a | 254 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
54b974dc | 255 | fatal("Privileged ports can only be forwarded by root."); |
3c62e7eb | 256 | #endif |
5260325f | 257 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) |
258 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
259 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
3867aa0a | 260 | |
d35f707e | 261 | fwd->listen_host = newfwd->listen_host; |
3867aa0a | 262 | fwd->listen_port = newfwd->listen_port; |
d35f707e | 263 | fwd->connect_host = newfwd->connect_host; |
3867aa0a | 264 | fwd->connect_port = newfwd->connect_port; |
8efc0c15 | 265 | } |
266 | ||
aa3378df | 267 | /* |
268 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
269 | * an error. | |
270 | */ | |
8efc0c15 | 271 | |
6ae2364d | 272 | void |
3867aa0a | 273 | add_remote_forward(Options *options, const Forward *newfwd) |
8efc0c15 | 274 | { |
5260325f | 275 | Forward *fwd; |
276 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
277 | fatal("Too many remote forwards (max %d).", | |
184eed6a | 278 | SSH_MAX_FORWARDS_PER_DIRECTION); |
5260325f | 279 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
3867aa0a | 280 | |
d35f707e | 281 | fwd->listen_host = newfwd->listen_host; |
3867aa0a | 282 | fwd->listen_port = newfwd->listen_port; |
d35f707e | 283 | fwd->connect_host = newfwd->connect_host; |
3867aa0a | 284 | fwd->connect_port = newfwd->connect_port; |
8efc0c15 | 285 | } |
286 | ||
e1c5bfaf | 287 | static void |
288 | clear_forwardings(Options *options) | |
289 | { | |
290 | int i; | |
291 | ||
3867aa0a | 292 | for (i = 0; i < options->num_local_forwards; i++) { |
2b74a069 | 293 | if (options->local_forwards[i].listen_host != NULL) |
294 | xfree(options->local_forwards[i].listen_host); | |
3867aa0a | 295 | xfree(options->local_forwards[i].connect_host); |
296 | } | |
e1c5bfaf | 297 | options->num_local_forwards = 0; |
3867aa0a | 298 | for (i = 0; i < options->num_remote_forwards; i++) { |
2b74a069 | 299 | if (options->remote_forwards[i].listen_host != NULL) |
300 | xfree(options->remote_forwards[i].listen_host); | |
3867aa0a | 301 | xfree(options->remote_forwards[i].connect_host); |
302 | } | |
e1c5bfaf | 303 | options->num_remote_forwards = 0; |
a4f24bf8 | 304 | options->tun_open = SSH_TUNMODE_NO; |
e1c5bfaf | 305 | } |
306 | ||
aa3378df | 307 | /* |
6be9a5e8 | 308 | * Returns the number of the token pointed to by cp or oBadOption. |
aa3378df | 309 | */ |
8efc0c15 | 310 | |
6ae2364d | 311 | static OpCodes |
5260325f | 312 | parse_token(const char *cp, const char *filename, int linenum) |
8efc0c15 | 313 | { |
1e3b8b07 | 314 | u_int i; |
8efc0c15 | 315 | |
5260325f | 316 | for (i = 0; keywords[i].name; i++) |
aa3378df | 317 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 318 | return keywords[i].opcode; |
8efc0c15 | 319 | |
b7c70970 | 320 | error("%s: line %d: Bad configuration option: %s", |
321 | filename, linenum, cp); | |
5260325f | 322 | return oBadOption; |
8efc0c15 | 323 | } |
324 | ||
aa3378df | 325 | /* |
326 | * Processes a single option line as used in the configuration files. This | |
327 | * only sets those values that have not already been set. | |
328 | */ | |
d718e75d | 329 | #define WHITESPACE " \t\r\n" |
8efc0c15 | 330 | |
e7c0f9d5 | 331 | int |
332 | process_config_line(Options *options, const char *host, | |
5260325f | 333 | char *line, const char *filename, int linenum, |
334 | int *activep) | |
8efc0c15 | 335 | { |
3867aa0a | 336 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
129d5252 | 337 | int opcode, *intptr, value, value2, scale; |
2a72bc03 | 338 | LogLevel *log_level_ptr; |
129d5252 | 339 | long long orig, val64; |
d718e75d | 340 | size_t len; |
3867aa0a | 341 | Forward fwd; |
5260325f | 342 | |
204fde99 | 343 | /* Strip trailing whitespace */ |
f8cc7664 | 344 | for (len = strlen(line) - 1; len > 0; len--) { |
204fde99 | 345 | if (strchr(WHITESPACE, line[len]) == NULL) |
346 | break; | |
347 | line[len] = '\0'; | |
348 | } | |
349 | ||
704b1659 | 350 | s = line; |
351 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
88299971 | 352 | if ((keyword = strdelim(&s)) == NULL) |
353 | return 0; | |
704b1659 | 354 | /* Ignore leading whitespace. */ |
355 | if (*keyword == '\0') | |
356 | keyword = strdelim(&s); | |
42f11eb2 | 357 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
5260325f | 358 | return 0; |
359 | ||
089fbbd2 | 360 | opcode = parse_token(keyword, filename, linenum); |
5260325f | 361 | |
362 | switch (opcode) { | |
363 | case oBadOption: | |
aa3378df | 364 | /* don't panic, but count bad options */ |
365 | return -1; | |
5260325f | 366 | /* NOTREACHED */ |
09ab3296 | 367 | case oConnectTimeout: |
368 | intptr = &options->connection_timeout; | |
5d8d32a3 | 369 | parse_time: |
09ab3296 | 370 | arg = strdelim(&s); |
371 | if (!arg || *arg == '\0') | |
372 | fatal("%s line %d: missing time value.", | |
373 | filename, linenum); | |
374 | if ((value = convtime(arg)) == -1) | |
375 | fatal("%s line %d: invalid time value.", | |
376 | filename, linenum); | |
7f650171 | 377 | if (*activep && *intptr == -1) |
09ab3296 | 378 | *intptr = value; |
379 | break; | |
380 | ||
5260325f | 381 | case oForwardAgent: |
382 | intptr = &options->forward_agent; | |
383 | parse_flag: | |
704b1659 | 384 | arg = strdelim(&s); |
089fbbd2 | 385 | if (!arg || *arg == '\0') |
5260325f | 386 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
387 | value = 0; /* To avoid compiler warning... */ | |
089fbbd2 | 388 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 389 | value = 1; |
089fbbd2 | 390 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 391 | value = 0; |
392 | else | |
393 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
394 | if (*activep && *intptr == -1) | |
395 | *intptr = value; | |
396 | break; | |
397 | ||
398 | case oForwardX11: | |
399 | intptr = &options->forward_x11; | |
400 | goto parse_flag; | |
401 | ||
d73a67d7 | 402 | case oForwardX11Trusted: |
403 | intptr = &options->forward_x11_trusted; | |
404 | goto parse_flag; | |
405 | ||
5260325f | 406 | case oGatewayPorts: |
407 | intptr = &options->gateway_ports; | |
408 | goto parse_flag; | |
409 | ||
42ea6f5e | 410 | case oExitOnForwardFailure: |
411 | intptr = &options->exit_on_forward_failure; | |
412 | goto parse_flag; | |
413 | ||
5260325f | 414 | case oUsePrivilegedPort: |
415 | intptr = &options->use_privileged_port; | |
416 | goto parse_flag; | |
417 | ||
5260325f | 418 | case oPasswordAuthentication: |
419 | intptr = &options->password_authentication; | |
420 | goto parse_flag; | |
421 | ||
5adf6b9a | 422 | case oZeroKnowledgePasswordAuthentication: |
423 | intptr = &options->zero_knowledge_password_authentication; | |
424 | goto parse_flag; | |
425 | ||
94ec8c6b | 426 | case oKbdInteractiveAuthentication: |
427 | intptr = &options->kbd_interactive_authentication; | |
428 | goto parse_flag; | |
429 | ||
430 | case oKbdInteractiveDevices: | |
431 | charptr = &options->kbd_interactive_devices; | |
432 | goto parse_string; | |
433 | ||
fa08c86b | 434 | case oPubkeyAuthentication: |
435 | intptr = &options->pubkey_authentication; | |
1d1ffb87 | 436 | goto parse_flag; |
437 | ||
5260325f | 438 | case oRSAAuthentication: |
439 | intptr = &options->rsa_authentication; | |
440 | goto parse_flag; | |
441 | ||
442 | case oRhostsRSAAuthentication: | |
443 | intptr = &options->rhosts_rsa_authentication; | |
444 | goto parse_flag; | |
445 | ||
8002af61 | 446 | case oHostbasedAuthentication: |
447 | intptr = &options->hostbased_authentication; | |
448 | goto parse_flag; | |
449 | ||
d464095c | 450 | case oChallengeResponseAuthentication: |
5ba55ada | 451 | intptr = &options->challenge_response_authentication; |
5260325f | 452 | goto parse_flag; |
d0ec7f42 | 453 | |
7364bd04 | 454 | case oGssAuthentication: |
455 | intptr = &options->gss_authentication; | |
456 | goto parse_flag; | |
457 | ||
458 | case oGssDelegateCreds: | |
459 | intptr = &options->gss_deleg_creds; | |
460 | goto parse_flag; | |
461 | ||
5260325f | 462 | case oBatchMode: |
463 | intptr = &options->batch_mode; | |
464 | goto parse_flag; | |
465 | ||
466 | case oCheckHostIP: | |
467 | intptr = &options->check_host_ip; | |
7b3999b8 | 468 | goto parse_flag; |
5260325f | 469 | |
21289cd0 | 470 | case oVerifyHostKeyDNS: |
471 | intptr = &options->verify_host_key_dns; | |
0161a13d | 472 | goto parse_yesnoask; |
21289cd0 | 473 | |
5260325f | 474 | case oStrictHostKeyChecking: |
475 | intptr = &options->strict_host_key_checking; | |
0161a13d | 476 | parse_yesnoask: |
704b1659 | 477 | arg = strdelim(&s); |
089fbbd2 | 478 | if (!arg || *arg == '\0') |
c76c8819 | 479 | fatal("%.200s line %d: Missing yes/no/ask argument.", |
184eed6a | 480 | filename, linenum); |
5260325f | 481 | value = 0; /* To avoid compiler warning... */ |
089fbbd2 | 482 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
5260325f | 483 | value = 1; |
089fbbd2 | 484 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
5260325f | 485 | value = 0; |
089fbbd2 | 486 | else if (strcmp(arg, "ask") == 0) |
5260325f | 487 | value = 2; |
488 | else | |
489 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
490 | if (*activep && *intptr == -1) | |
491 | *intptr = value; | |
492 | break; | |
493 | ||
494 | case oCompression: | |
495 | intptr = &options->compression; | |
496 | goto parse_flag; | |
497 | ||
fd573618 | 498 | case oTCPKeepAlive: |
499 | intptr = &options->tcp_keep_alive; | |
5260325f | 500 | goto parse_flag; |
501 | ||
8bbc048a | 502 | case oNoHostAuthenticationForLocalhost: |
503 | intptr = &options->no_host_authentication_for_localhost; | |
504 | goto parse_flag; | |
505 | ||
5260325f | 506 | case oNumberOfPasswordPrompts: |
507 | intptr = &options->number_of_password_prompts; | |
508 | goto parse_int; | |
509 | ||
510 | case oCompressionLevel: | |
511 | intptr = &options->compression_level; | |
512 | goto parse_int; | |
513 | ||
ffd7b36b | 514 | case oRekeyLimit: |
ffd7b36b | 515 | arg = strdelim(&s); |
516 | if (!arg || *arg == '\0') | |
517 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
518 | if (arg[0] < '0' || arg[0] > '9') | |
519 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
129d5252 | 520 | orig = val64 = strtoll(arg, &endofnumber, 10); |
ffd7b36b | 521 | if (arg == endofnumber) |
522 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
523 | switch (toupper(*endofnumber)) { | |
129d5252 | 524 | case '\0': |
525 | scale = 1; | |
526 | break; | |
ffd7b36b | 527 | case 'K': |
129d5252 | 528 | scale = 1<<10; |
ffd7b36b | 529 | break; |
530 | case 'M': | |
129d5252 | 531 | scale = 1<<20; |
ffd7b36b | 532 | break; |
533 | case 'G': | |
129d5252 | 534 | scale = 1<<30; |
ffd7b36b | 535 | break; |
129d5252 | 536 | default: |
537 | fatal("%.200s line %d: Invalid RekeyLimit suffix", | |
538 | filename, linenum); | |
ffd7b36b | 539 | } |
129d5252 | 540 | val64 *= scale; |
541 | /* detect integer wrap and too-large limits */ | |
fe771396 | 542 | if ((val64 / scale) != orig || val64 > UINT_MAX) |
129d5252 | 543 | fatal("%.200s line %d: RekeyLimit too large", |
544 | filename, linenum); | |
545 | if (val64 < 16) | |
546 | fatal("%.200s line %d: RekeyLimit too small", | |
547 | filename, linenum); | |
fe771396 | 548 | if (*activep && options->rekey_limit == -1) |
549 | options->rekey_limit = (u_int32_t)val64; | |
ffd7b36b | 550 | break; |
551 | ||
5260325f | 552 | case oIdentityFile: |
704b1659 | 553 | arg = strdelim(&s); |
089fbbd2 | 554 | if (!arg || *arg == '\0') |
5260325f | 555 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
556 | if (*activep) { | |
fa08c86b | 557 | intptr = &options->num_identity_files; |
a306f2dd | 558 | if (*intptr >= SSH_MAX_IDENTITY_FILES) |
5260325f | 559 | fatal("%.200s line %d: Too many identity files specified (max %d).", |
184eed6a | 560 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
0cf6a024 | 561 | charptr = &options->identity_files[*intptr]; |
089fbbd2 | 562 | *charptr = xstrdup(arg); |
a306f2dd | 563 | *intptr = *intptr + 1; |
5260325f | 564 | } |
565 | break; | |
566 | ||
fa649821 | 567 | case oXAuthLocation: |
568 | charptr=&options->xauth_location; | |
569 | goto parse_string; | |
570 | ||
5260325f | 571 | case oUser: |
572 | charptr = &options->user; | |
573 | parse_string: | |
704b1659 | 574 | arg = strdelim(&s); |
089fbbd2 | 575 | if (!arg || *arg == '\0') |
5260325f | 576 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
577 | if (*activep && *charptr == NULL) | |
089fbbd2 | 578 | *charptr = xstrdup(arg); |
5260325f | 579 | break; |
580 | ||
581 | case oGlobalKnownHostsFile: | |
582 | charptr = &options->system_hostfile; | |
583 | goto parse_string; | |
584 | ||
585 | case oUserKnownHostsFile: | |
586 | charptr = &options->user_hostfile; | |
587 | goto parse_string; | |
588 | ||
a306f2dd | 589 | case oGlobalKnownHostsFile2: |
590 | charptr = &options->system_hostfile2; | |
591 | goto parse_string; | |
592 | ||
593 | case oUserKnownHostsFile2: | |
594 | charptr = &options->user_hostfile2; | |
595 | goto parse_string; | |
596 | ||
5260325f | 597 | case oHostName: |
598 | charptr = &options->hostname; | |
599 | goto parse_string; | |
600 | ||
8abcdba4 | 601 | case oHostKeyAlias: |
602 | charptr = &options->host_key_alias; | |
603 | goto parse_string; | |
604 | ||
cab80f75 | 605 | case oPreferredAuthentications: |
606 | charptr = &options->preferred_authentications; | |
607 | goto parse_string; | |
608 | ||
3435f5a6 | 609 | case oBindAddress: |
610 | charptr = &options->bind_address; | |
611 | goto parse_string; | |
612 | ||
eea098a3 | 613 | case oSmartcardDevice: |
9ff6f66f | 614 | charptr = &options->smartcard_device; |
615 | goto parse_string; | |
eea098a3 | 616 | |
5260325f | 617 | case oProxyCommand: |
d20f3c9e | 618 | charptr = &options->proxy_command; |
619 | parse_command: | |
2d9c1828 | 620 | if (s == NULL) |
621 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
d718e75d | 622 | len = strspn(s, WHITESPACE "="); |
5260325f | 623 | if (*activep && *charptr == NULL) |
d718e75d | 624 | *charptr = xstrdup(s + len); |
5260325f | 625 | return 0; |
626 | ||
627 | case oPort: | |
628 | intptr = &options->port; | |
629 | parse_int: | |
704b1659 | 630 | arg = strdelim(&s); |
089fbbd2 | 631 | if (!arg || *arg == '\0') |
5260325f | 632 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 633 | if (arg[0] < '0' || arg[0] > '9') |
5260325f | 634 | fatal("%.200s line %d: Bad number.", filename, linenum); |
aa3378df | 635 | |
636 | /* Octal, decimal, or hex format? */ | |
089fbbd2 | 637 | value = strtol(arg, &endofnumber, 0); |
638 | if (arg == endofnumber) | |
aa3378df | 639 | fatal("%.200s line %d: Bad number.", filename, linenum); |
5260325f | 640 | if (*activep && *intptr == -1) |
641 | *intptr = value; | |
642 | break; | |
643 | ||
644 | case oConnectionAttempts: | |
645 | intptr = &options->connection_attempts; | |
646 | goto parse_int; | |
647 | ||
648 | case oCipher: | |
649 | intptr = &options->cipher; | |
704b1659 | 650 | arg = strdelim(&s); |
089fbbd2 | 651 | if (!arg || *arg == '\0') |
71276795 | 652 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 653 | value = cipher_number(arg); |
5260325f | 654 | if (value == -1) |
655 | fatal("%.200s line %d: Bad cipher '%s'.", | |
184eed6a | 656 | filename, linenum, arg ? arg : "<NONE>"); |
5260325f | 657 | if (*activep && *intptr == -1) |
658 | *intptr = value; | |
659 | break; | |
660 | ||
a8be9f80 | 661 | case oCiphers: |
704b1659 | 662 | arg = strdelim(&s); |
089fbbd2 | 663 | if (!arg || *arg == '\0') |
71276795 | 664 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 665 | if (!ciphers_valid(arg)) |
d0c832f3 | 666 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
184eed6a | 667 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 668 | if (*activep && options->ciphers == NULL) |
089fbbd2 | 669 | options->ciphers = xstrdup(arg); |
a8be9f80 | 670 | break; |
671 | ||
b2552997 | 672 | case oMacs: |
673 | arg = strdelim(&s); | |
674 | if (!arg || *arg == '\0') | |
675 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
676 | if (!mac_valid(arg)) | |
677 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
184eed6a | 678 | filename, linenum, arg ? arg : "<NONE>"); |
b2552997 | 679 | if (*activep && options->macs == NULL) |
680 | options->macs = xstrdup(arg); | |
681 | break; | |
682 | ||
e961a8f9 | 683 | case oHostKeyAlgorithms: |
684 | arg = strdelim(&s); | |
685 | if (!arg || *arg == '\0') | |
686 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
687 | if (!key_names_valid2(arg)) | |
688 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
184eed6a | 689 | filename, linenum, arg ? arg : "<NONE>"); |
e961a8f9 | 690 | if (*activep && options->hostkeyalgorithms == NULL) |
691 | options->hostkeyalgorithms = xstrdup(arg); | |
692 | break; | |
693 | ||
a8be9f80 | 694 | case oProtocol: |
695 | intptr = &options->protocol; | |
704b1659 | 696 | arg = strdelim(&s); |
089fbbd2 | 697 | if (!arg || *arg == '\0') |
71276795 | 698 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 699 | value = proto_spec(arg); |
a8be9f80 | 700 | if (value == SSH_PROTO_UNKNOWN) |
701 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
184eed6a | 702 | filename, linenum, arg ? arg : "<NONE>"); |
a8be9f80 | 703 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
704 | *intptr = value; | |
705 | break; | |
706 | ||
5260325f | 707 | case oLogLevel: |
2a72bc03 | 708 | log_level_ptr = &options->log_level; |
704b1659 | 709 | arg = strdelim(&s); |
089fbbd2 | 710 | value = log_level_number(arg); |
5eaf8578 | 711 | if (value == SYSLOG_LEVEL_NOT_SET) |
54b974dc | 712 | fatal("%.200s line %d: unsupported log level '%s'", |
184eed6a | 713 | filename, linenum, arg ? arg : "<NONE>"); |
2a72bc03 | 714 | if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET) |
715 | *log_level_ptr = (LogLevel) value; | |
5260325f | 716 | break; |
717 | ||
5260325f | 718 | case oLocalForward: |
3a8aabf0 | 719 | case oRemoteForward: |
30573fea | 720 | case oDynamicForward: |
704b1659 | 721 | arg = strdelim(&s); |
3867aa0a | 722 | if (arg == NULL || *arg == '\0') |
3a8aabf0 | 723 | fatal("%.200s line %d: Missing port argument.", |
724 | filename, linenum); | |
3867aa0a | 725 | |
30573fea | 726 | if (opcode == oLocalForward || |
727 | opcode == oRemoteForward) { | |
728 | arg2 = strdelim(&s); | |
729 | if (arg2 == NULL || *arg2 == '\0') | |
730 | fatal("%.200s line %d: Missing target argument.", | |
731 | filename, linenum); | |
3867aa0a | 732 | |
30573fea | 733 | /* construct a string for parse_forward */ |
734 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
735 | } else if (opcode == oDynamicForward) { | |
736 | strlcpy(fwdarg, arg, sizeof(fwdarg)); | |
737 | } | |
738 | ||
739 | if (parse_forward(&fwd, fwdarg, | |
17525a70 | 740 | opcode == oDynamicForward ? 1 : 0, |
741 | opcode == oRemoteForward ? 1 : 0) == 0) | |
3a8aabf0 | 742 | fatal("%.200s line %d: Bad forwarding specification.", |
743 | filename, linenum); | |
3867aa0a | 744 | |
3a8aabf0 | 745 | if (*activep) { |
30573fea | 746 | if (opcode == oLocalForward || |
747 | opcode == oDynamicForward) | |
3867aa0a | 748 | add_local_forward(options, &fwd); |
3a8aabf0 | 749 | else if (opcode == oRemoteForward) |
3867aa0a | 750 | add_remote_forward(options, &fwd); |
3a8aabf0 | 751 | } |
5260325f | 752 | break; |
753 | ||
e1c5bfaf | 754 | case oClearAllForwardings: |
755 | intptr = &options->clear_forwardings; | |
756 | goto parse_flag; | |
757 | ||
5260325f | 758 | case oHost: |
759 | *activep = 0; | |
704b1659 | 760 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
089fbbd2 | 761 | if (match_pattern(host, arg)) { |
762 | debug("Applying options for %.100s", arg); | |
5260325f | 763 | *activep = 1; |
764 | break; | |
765 | } | |
704b1659 | 766 | /* Avoid garbage check below, as strdelim is done. */ |
5260325f | 767 | return 0; |
768 | ||
769 | case oEscapeChar: | |
770 | intptr = &options->escape_char; | |
704b1659 | 771 | arg = strdelim(&s); |
089fbbd2 | 772 | if (!arg || *arg == '\0') |
5260325f | 773 | fatal("%.200s line %d: Missing argument.", filename, linenum); |
089fbbd2 | 774 | if (arg[0] == '^' && arg[2] == 0 && |
1e3b8b07 | 775 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
776 | value = (u_char) arg[1] & 31; | |
089fbbd2 | 777 | else if (strlen(arg) == 1) |
1e3b8b07 | 778 | value = (u_char) arg[0]; |
089fbbd2 | 779 | else if (strcmp(arg, "none") == 0) |
4bf9c10e | 780 | value = SSH_ESCAPECHAR_NONE; |
5260325f | 781 | else { |
782 | fatal("%.200s line %d: Bad escape character.", | |
184eed6a | 783 | filename, linenum); |
5260325f | 784 | /* NOTREACHED */ |
785 | value = 0; /* Avoid compiler warning. */ | |
786 | } | |
787 | if (*activep && *intptr == -1) | |
788 | *intptr = value; | |
789 | break; | |
790 | ||
f811e52a | 791 | case oAddressFamily: |
792 | arg = strdelim(&s); | |
38634ff6 | 793 | if (!arg || *arg == '\0') |
794 | fatal("%s line %d: missing address family.", | |
795 | filename, linenum); | |
1572b90f | 796 | intptr = &options->address_family; |
f811e52a | 797 | if (strcasecmp(arg, "inet") == 0) |
1572b90f | 798 | value = AF_INET; |
f811e52a | 799 | else if (strcasecmp(arg, "inet6") == 0) |
1572b90f | 800 | value = AF_INET6; |
f811e52a | 801 | else if (strcasecmp(arg, "any") == 0) |
1572b90f | 802 | value = AF_UNSPEC; |
f811e52a | 803 | else |
804 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
1572b90f | 805 | if (*activep && *intptr == -1) |
806 | *intptr = value; | |
f811e52a | 807 | break; |
808 | ||
cc46e2ee | 809 | case oEnableSSHKeysign: |
810 | intptr = &options->enable_ssh_keysign; | |
811 | goto parse_flag; | |
812 | ||
3a065ed0 | 813 | case oIdentitiesOnly: |
814 | intptr = &options->identities_only; | |
815 | goto parse_flag; | |
816 | ||
5d8d32a3 | 817 | case oServerAliveInterval: |
818 | intptr = &options->server_alive_interval; | |
819 | goto parse_time; | |
820 | ||
821 | case oServerAliveCountMax: | |
822 | intptr = &options->server_alive_count_max; | |
823 | goto parse_int; | |
824 | ||
61a2c1da | 825 | case oSendEnv: |
826 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
827 | if (strchr(arg, '=') != NULL) | |
828 | fatal("%s line %d: Invalid environment name.", | |
829 | filename, linenum); | |
c8c99dd5 | 830 | if (!*activep) |
831 | continue; | |
61a2c1da | 832 | if (options->num_send_env >= MAX_SEND_ENV) |
833 | fatal("%s line %d: too many send env.", | |
834 | filename, linenum); | |
835 | options->send_env[options->num_send_env++] = | |
836 | xstrdup(arg); | |
837 | } | |
838 | break; | |
839 | ||
5e96b616 | 840 | case oControlPath: |
841 | charptr = &options->control_path; | |
842 | goto parse_string; | |
843 | ||
844 | case oControlMaster: | |
845 | intptr = &options->control_master; | |
9dfd96d6 | 846 | arg = strdelim(&s); |
847 | if (!arg || *arg == '\0') | |
848 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
849 | filename, linenum); | |
850 | value = 0; /* To avoid compiler warning... */ | |
851 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
852 | value = SSHCTL_MASTER_YES; | |
853 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
854 | value = SSHCTL_MASTER_NO; | |
855 | else if (strcmp(arg, "auto") == 0) | |
856 | value = SSHCTL_MASTER_AUTO; | |
857 | else if (strcmp(arg, "ask") == 0) | |
858 | value = SSHCTL_MASTER_ASK; | |
859 | else if (strcmp(arg, "autoask") == 0) | |
860 | value = SSHCTL_MASTER_AUTO_ASK; | |
861 | else | |
862 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
863 | filename, linenum); | |
864 | if (*activep && *intptr == -1) | |
865 | *intptr = value; | |
866 | break; | |
5e96b616 | 867 | |
5c63c2ab | 868 | case oHashKnownHosts: |
869 | intptr = &options->hash_known_hosts; | |
870 | goto parse_flag; | |
871 | ||
d20f3c9e | 872 | case oTunnel: |
873 | intptr = &options->tun_open; | |
a4f24bf8 | 874 | arg = strdelim(&s); |
875 | if (!arg || *arg == '\0') | |
876 | fatal("%s line %d: Missing yes/point-to-point/" | |
877 | "ethernet/no argument.", filename, linenum); | |
878 | value = 0; /* silence compiler */ | |
879 | if (strcasecmp(arg, "ethernet") == 0) | |
880 | value = SSH_TUNMODE_ETHERNET; | |
881 | else if (strcasecmp(arg, "point-to-point") == 0) | |
882 | value = SSH_TUNMODE_POINTOPOINT; | |
883 | else if (strcasecmp(arg, "yes") == 0) | |
884 | value = SSH_TUNMODE_DEFAULT; | |
885 | else if (strcasecmp(arg, "no") == 0) | |
886 | value = SSH_TUNMODE_NO; | |
887 | else | |
888 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
889 | "no argument: %s", filename, linenum, arg); | |
890 | if (*activep) | |
891 | *intptr = value; | |
892 | break; | |
d20f3c9e | 893 | |
894 | case oTunnelDevice: | |
895 | arg = strdelim(&s); | |
896 | if (!arg || *arg == '\0') | |
897 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
898 | value = a2tun(arg, &value2); | |
a4f24bf8 | 899 | if (value == SSH_TUNID_ERR) |
d20f3c9e | 900 | fatal("%.200s line %d: Bad tun device.", filename, linenum); |
901 | if (*activep) { | |
902 | options->tun_local = value; | |
903 | options->tun_remote = value2; | |
904 | } | |
905 | break; | |
906 | ||
907 | case oLocalCommand: | |
908 | charptr = &options->local_command; | |
909 | goto parse_command; | |
910 | ||
911 | case oPermitLocalCommand: | |
912 | intptr = &options->permit_local_command; | |
913 | goto parse_flag; | |
914 | ||
7b3999b8 | 915 | case oVisualHostKey: |
916 | intptr = &options->visual_host_key; | |
917 | goto parse_flag; | |
918 | ||
94c0aea4 | 919 | case oUseRoaming: |
920 | intptr = &options->use_roaming; | |
921 | goto parse_flag; | |
922 | ||
fe7dba42 | 923 | case oRDomain: |
924 | arg = strdelim(&s); | |
925 | if (!arg || *arg == '\0') | |
926 | fatal("%.200s line %d: Missing argument.", | |
927 | filename, linenum); | |
928 | value = a2port(arg); | |
929 | if (value == -1) | |
930 | fatal("%.200s line %d: Bad rdomain.", | |
931 | filename, linenum); | |
932 | if (*activep) | |
933 | options->rdomain = value; | |
934 | break; | |
935 | ||
80fcb74e | 936 | case oDeprecated: |
4feae93d | 937 | debug("%s line %d: Deprecated option \"%s\"", |
80fcb74e | 938 | filename, linenum, keyword); |
4feae93d | 939 | return 0; |
80fcb74e | 940 | |
a2144546 | 941 | case oUnsupported: |
942 | error("%s line %d: Unsupported option \"%s\"", | |
943 | filename, linenum, keyword); | |
944 | return 0; | |
945 | ||
5260325f | 946 | default: |
947 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
948 | } | |
949 | ||
950 | /* Check that there is no garbage at end of line. */ | |
42f11eb2 | 951 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
089fbbd2 | 952 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
4e2e5cfd | 953 | filename, linenum, arg); |
089fbbd2 | 954 | } |
5260325f | 955 | return 0; |
8efc0c15 | 956 | } |
957 | ||
958 | ||
aa3378df | 959 | /* |
960 | * Reads the config file and modifies the options accordingly. Options | |
961 | * should already be initialized before this call. This never returns if | |
93111dfa | 962 | * there is an error. If the file does not exist, this returns 0. |
aa3378df | 963 | */ |
8efc0c15 | 964 | |
93111dfa | 965 | int |
f2107e97 | 966 | read_config_file(const char *filename, const char *host, Options *options, |
9f6cab4b | 967 | int checkperm) |
8efc0c15 | 968 | { |
5260325f | 969 | FILE *f; |
970 | char line[1024]; | |
971 | int active, linenum; | |
972 | int bad_options = 0; | |
973 | ||
9f6cab4b | 974 | if ((f = fopen(filename, "r")) == NULL) |
93111dfa | 975 | return 0; |
5260325f | 976 | |
9f6cab4b | 977 | if (checkperm) { |
978 | struct stat sb; | |
f2107e97 | 979 | |
f9ee425b | 980 | if (fstat(fileno(f), &sb) == -1) |
9f6cab4b | 981 | fatal("fstat %s: %s", filename, strerror(errno)); |
9f6cab4b | 982 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || |
f9ee425b | 983 | (sb.st_mode & 022) != 0)) |
9f6cab4b | 984 | fatal("Bad owner or permissions on %s", filename); |
9f6cab4b | 985 | } |
986 | ||
5260325f | 987 | debug("Reading configuration data %.200s", filename); |
988 | ||
aa3378df | 989 | /* |
990 | * Mark that we are now processing the options. This flag is turned | |
991 | * on/off by Host specifications. | |
992 | */ | |
5260325f | 993 | active = 1; |
994 | linenum = 0; | |
995 | while (fgets(line, sizeof(line), f)) { | |
996 | /* Update line number counter. */ | |
997 | linenum++; | |
998 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
999 | bad_options++; | |
1000 | } | |
1001 | fclose(f); | |
1002 | if (bad_options > 0) | |
54b974dc | 1003 | fatal("%s: terminating, %d bad configuration options", |
184eed6a | 1004 | filename, bad_options); |
93111dfa | 1005 | return 1; |
8efc0c15 | 1006 | } |
1007 | ||
aa3378df | 1008 | /* |
1009 | * Initializes options to special values that indicate that they have not yet | |
1010 | * been set. Read_config_file will only set options with this value. Options | |
1011 | * are processed in the following order: command line, user config file, | |
1012 | * system config file. Last, fill_default_options is called. | |
1013 | */ | |
8efc0c15 | 1014 | |
6ae2364d | 1015 | void |
5260325f | 1016 | initialize_options(Options * options) |
8efc0c15 | 1017 | { |
5260325f | 1018 | memset(options, 'X', sizeof(*options)); |
1019 | options->forward_agent = -1; | |
1020 | options->forward_x11 = -1; | |
d73a67d7 | 1021 | options->forward_x11_trusted = -1; |
42ea6f5e | 1022 | options->exit_on_forward_failure = -1; |
fa649821 | 1023 | options->xauth_location = NULL; |
5260325f | 1024 | options->gateway_ports = -1; |
1025 | options->use_privileged_port = -1; | |
5260325f | 1026 | options->rsa_authentication = -1; |
fa08c86b | 1027 | options->pubkey_authentication = -1; |
5ba55ada | 1028 | options->challenge_response_authentication = -1; |
7364bd04 | 1029 | options->gss_authentication = -1; |
1030 | options->gss_deleg_creds = -1; | |
5260325f | 1031 | options->password_authentication = -1; |
94ec8c6b | 1032 | options->kbd_interactive_authentication = -1; |
1033 | options->kbd_interactive_devices = NULL; | |
5260325f | 1034 | options->rhosts_rsa_authentication = -1; |
8002af61 | 1035 | options->hostbased_authentication = -1; |
5260325f | 1036 | options->batch_mode = -1; |
1037 | options->check_host_ip = -1; | |
1038 | options->strict_host_key_checking = -1; | |
1039 | options->compression = -1; | |
fd573618 | 1040 | options->tcp_keep_alive = -1; |
5260325f | 1041 | options->compression_level = -1; |
1042 | options->port = -1; | |
1572b90f | 1043 | options->address_family = -1; |
5260325f | 1044 | options->connection_attempts = -1; |
09ab3296 | 1045 | options->connection_timeout = -1; |
5260325f | 1046 | options->number_of_password_prompts = -1; |
1047 | options->cipher = -1; | |
a8be9f80 | 1048 | options->ciphers = NULL; |
b2552997 | 1049 | options->macs = NULL; |
e961a8f9 | 1050 | options->hostkeyalgorithms = NULL; |
a8be9f80 | 1051 | options->protocol = SSH_PROTO_UNKNOWN; |
5260325f | 1052 | options->num_identity_files = 0; |
1053 | options->hostname = NULL; | |
8abcdba4 | 1054 | options->host_key_alias = NULL; |
5260325f | 1055 | options->proxy_command = NULL; |
1056 | options->user = NULL; | |
1057 | options->escape_char = -1; | |
1058 | options->system_hostfile = NULL; | |
1059 | options->user_hostfile = NULL; | |
a306f2dd | 1060 | options->system_hostfile2 = NULL; |
1061 | options->user_hostfile2 = NULL; | |
5260325f | 1062 | options->num_local_forwards = 0; |
1063 | options->num_remote_forwards = 0; | |
e1c5bfaf | 1064 | options->clear_forwardings = -1; |
5eaf8578 | 1065 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
cab80f75 | 1066 | options->preferred_authentications = NULL; |
3435f5a6 | 1067 | options->bind_address = NULL; |
9ff6f66f | 1068 | options->smartcard_device = NULL; |
cc46e2ee | 1069 | options->enable_ssh_keysign = - 1; |
8bbc048a | 1070 | options->no_host_authentication_for_localhost = - 1; |
3a065ed0 | 1071 | options->identities_only = - 1; |
ffd7b36b | 1072 | options->rekey_limit = - 1; |
21289cd0 | 1073 | options->verify_host_key_dns = -1; |
5d8d32a3 | 1074 | options->server_alive_interval = -1; |
1075 | options->server_alive_count_max = -1; | |
61a2c1da | 1076 | options->num_send_env = 0; |
5e96b616 | 1077 | options->control_path = NULL; |
1078 | options->control_master = -1; | |
5c63c2ab | 1079 | options->hash_known_hosts = -1; |
d20f3c9e | 1080 | options->tun_open = -1; |
1081 | options->tun_local = -1; | |
1082 | options->tun_remote = -1; | |
1083 | options->local_command = NULL; | |
1084 | options->permit_local_command = -1; | |
94c0aea4 | 1085 | options->use_roaming = -1; |
fe7dba42 | 1086 | options->rdomain = -1; |
7b3999b8 | 1087 | options->visual_host_key = -1; |
5adf6b9a | 1088 | options->zero_knowledge_password_authentication = -1; |
8efc0c15 | 1089 | } |
1090 | ||
aa3378df | 1091 | /* |
1092 | * Called after processing other sources of option data, this fills those | |
1093 | * options for which no value has been specified with their default values. | |
1094 | */ | |
8efc0c15 | 1095 | |
6ae2364d | 1096 | void |
5260325f | 1097 | fill_default_options(Options * options) |
8efc0c15 | 1098 | { |
d2c46e77 | 1099 | int len; |
1100 | ||
5260325f | 1101 | if (options->forward_agent == -1) |
71276795 | 1102 | options->forward_agent = 0; |
5260325f | 1103 | if (options->forward_x11 == -1) |
c8d54615 | 1104 | options->forward_x11 = 0; |
d73a67d7 | 1105 | if (options->forward_x11_trusted == -1) |
1106 | options->forward_x11_trusted = 0; | |
42ea6f5e | 1107 | if (options->exit_on_forward_failure == -1) |
1108 | options->exit_on_forward_failure = 0; | |
fa649821 | 1109 | if (options->xauth_location == NULL) |
fd9ede94 | 1110 | options->xauth_location = _PATH_XAUTH; |
5260325f | 1111 | if (options->gateway_ports == -1) |
1112 | options->gateway_ports = 0; | |
1113 | if (options->use_privileged_port == -1) | |
d5ebca2b | 1114 | options->use_privileged_port = 0; |
5260325f | 1115 | if (options->rsa_authentication == -1) |
1116 | options->rsa_authentication = 1; | |
fa08c86b | 1117 | if (options->pubkey_authentication == -1) |
1118 | options->pubkey_authentication = 1; | |
5ba55ada | 1119 | if (options->challenge_response_authentication == -1) |
10a2cbef | 1120 | options->challenge_response_authentication = 1; |
7364bd04 | 1121 | if (options->gss_authentication == -1) |
2ecb78df | 1122 | options->gss_authentication = 0; |
7364bd04 | 1123 | if (options->gss_deleg_creds == -1) |
1124 | options->gss_deleg_creds = 0; | |
5260325f | 1125 | if (options->password_authentication == -1) |
1126 | options->password_authentication = 1; | |
94ec8c6b | 1127 | if (options->kbd_interactive_authentication == -1) |
d464095c | 1128 | options->kbd_interactive_authentication = 1; |
5260325f | 1129 | if (options->rhosts_rsa_authentication == -1) |
4b3d23b4 | 1130 | options->rhosts_rsa_authentication = 0; |
8002af61 | 1131 | if (options->hostbased_authentication == -1) |
1132 | options->hostbased_authentication = 0; | |
5260325f | 1133 | if (options->batch_mode == -1) |
1134 | options->batch_mode = 0; | |
1135 | if (options->check_host_ip == -1) | |
1136 | options->check_host_ip = 1; | |
1137 | if (options->strict_host_key_checking == -1) | |
1138 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1139 | if (options->compression == -1) | |
1140 | options->compression = 0; | |
fd573618 | 1141 | if (options->tcp_keep_alive == -1) |
1142 | options->tcp_keep_alive = 1; | |
5260325f | 1143 | if (options->compression_level == -1) |
1144 | options->compression_level = 6; | |
1145 | if (options->port == -1) | |
1146 | options->port = 0; /* Filled in ssh_connect. */ | |
1572b90f | 1147 | if (options->address_family == -1) |
1148 | options->address_family = AF_UNSPEC; | |
5260325f | 1149 | if (options->connection_attempts == -1) |
ce773142 | 1150 | options->connection_attempts = 1; |
5260325f | 1151 | if (options->number_of_password_prompts == -1) |
1152 | options->number_of_password_prompts = 3; | |
1153 | /* Selected in ssh_login(). */ | |
1154 | if (options->cipher == -1) | |
1155 | options->cipher = SSH_CIPHER_NOT_SET; | |
d0c832f3 | 1156 | /* options->ciphers, default set in myproposals.h */ |
b2552997 | 1157 | /* options->macs, default set in myproposals.h */ |
e961a8f9 | 1158 | /* options->hostkeyalgorithms, default set in myproposals.h */ |
a8be9f80 | 1159 | if (options->protocol == SSH_PROTO_UNKNOWN) |
21af5fc4 | 1160 | options->protocol = SSH_PROTO_2; |
5260325f | 1161 | if (options->num_identity_files == 0) { |
fa08c86b | 1162 | if (options->protocol & SSH_PROTO_1) { |
d2c46e77 | 1163 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
fa08c86b | 1164 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1165 | xmalloc(len); |
1166 | snprintf(options->identity_files[options->num_identity_files++], | |
1167 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
fa08c86b | 1168 | } |
1169 | if (options->protocol & SSH_PROTO_2) { | |
ec63b02d | 1170 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; |
1171 | options->identity_files[options->num_identity_files] = | |
1172 | xmalloc(len); | |
1173 | snprintf(options->identity_files[options->num_identity_files++], | |
1174 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1175 | ||
d2c46e77 | 1176 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
fa08c86b | 1177 | options->identity_files[options->num_identity_files] = |
d2c46e77 | 1178 | xmalloc(len); |
1179 | snprintf(options->identity_files[options->num_identity_files++], | |
1180 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
fa08c86b | 1181 | } |
a306f2dd | 1182 | } |
5260325f | 1183 | if (options->escape_char == -1) |
1184 | options->escape_char = '~'; | |
1185 | if (options->system_hostfile == NULL) | |
42f11eb2 | 1186 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
5260325f | 1187 | if (options->user_hostfile == NULL) |
42f11eb2 | 1188 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
a306f2dd | 1189 | if (options->system_hostfile2 == NULL) |
42f11eb2 | 1190 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
a306f2dd | 1191 | if (options->user_hostfile2 == NULL) |
42f11eb2 | 1192 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
5eaf8578 | 1193 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 1194 | options->log_level = SYSLOG_LEVEL_INFO; |
e1c5bfaf | 1195 | if (options->clear_forwardings == 1) |
1196 | clear_forwardings(options); | |
8bbc048a | 1197 | if (options->no_host_authentication_for_localhost == - 1) |
1198 | options->no_host_authentication_for_localhost = 0; | |
3a065ed0 | 1199 | if (options->identities_only == -1) |
1200 | options->identities_only = 0; | |
cc46e2ee | 1201 | if (options->enable_ssh_keysign == -1) |
1202 | options->enable_ssh_keysign = 0; | |
ffd7b36b | 1203 | if (options->rekey_limit == -1) |
1204 | options->rekey_limit = 0; | |
21289cd0 | 1205 | if (options->verify_host_key_dns == -1) |
1206 | options->verify_host_key_dns = 0; | |
5d8d32a3 | 1207 | if (options->server_alive_interval == -1) |
1208 | options->server_alive_interval = 0; | |
1209 | if (options->server_alive_count_max == -1) | |
1210 | options->server_alive_count_max = 3; | |
5e96b616 | 1211 | if (options->control_master == -1) |
1212 | options->control_master = 0; | |
5c63c2ab | 1213 | if (options->hash_known_hosts == -1) |
1214 | options->hash_known_hosts = 0; | |
d20f3c9e | 1215 | if (options->tun_open == -1) |
a4f24bf8 | 1216 | options->tun_open = SSH_TUNMODE_NO; |
1217 | if (options->tun_local == -1) | |
1218 | options->tun_local = SSH_TUNID_ANY; | |
1219 | if (options->tun_remote == -1) | |
1220 | options->tun_remote = SSH_TUNID_ANY; | |
d20f3c9e | 1221 | if (options->permit_local_command == -1) |
1222 | options->permit_local_command = 0; | |
94c0aea4 | 1223 | if (options->use_roaming == -1) |
1224 | options->use_roaming = 1; | |
7b3999b8 | 1225 | if (options->visual_host_key == -1) |
1226 | options->visual_host_key = 0; | |
5adf6b9a | 1227 | if (options->zero_knowledge_password_authentication == -1) |
1228 | options->zero_knowledge_password_authentication = 0; | |
d20f3c9e | 1229 | /* options->local_command should not be set by default */ |
5260325f | 1230 | /* options->proxy_command should not be set by default */ |
1231 | /* options->user will be set in the main program if appropriate */ | |
1232 | /* options->hostname will be set in the main program if appropriate */ | |
8abcdba4 | 1233 | /* options->host_key_alias should not be set by default */ |
cab80f75 | 1234 | /* options->preferred_authentications will be set in ssh */ |
fe7dba42 | 1235 | /* options->rdomain should not be set by default */ |
8efc0c15 | 1236 | } |
3867aa0a | 1237 | |
1238 | /* | |
1239 | * parse_forward | |
1240 | * parses a string containing a port forwarding specification of the form: | |
30573fea | 1241 | * dynamicfwd == 0 |
3867aa0a | 1242 | * [listenhost:]listenport:connecthost:connectport |
30573fea | 1243 | * dynamicfwd == 1 |
1244 | * [listenhost:]listenport | |
3867aa0a | 1245 | * returns number of arguments parsed or zero on error |
1246 | */ | |
1247 | int | |
17525a70 | 1248 | parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd) |
3867aa0a | 1249 | { |
1250 | int i; | |
1251 | char *p, *cp, *fwdarg[4]; | |
1252 | ||
1253 | memset(fwd, '\0', sizeof(*fwd)); | |
1254 | ||
1255 | cp = p = xstrdup(fwdspec); | |
1256 | ||
1257 | /* skip leading spaces */ | |
f48fbab3 | 1258 | while (isspace(*cp)) |
3867aa0a | 1259 | cp++; |
1260 | ||
1261 | for (i = 0; i < 4; ++i) | |
1262 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1263 | break; | |
1264 | ||
c8eaf0ec | 1265 | /* Check for trailing garbage */ |
3867aa0a | 1266 | if (cp != NULL) |
1267 | i = 0; /* failure */ | |
1268 | ||
1269 | switch (i) { | |
30573fea | 1270 | case 1: |
1271 | fwd->listen_host = NULL; | |
1272 | fwd->listen_port = a2port(fwdarg[0]); | |
1273 | fwd->connect_host = xstrdup("socks"); | |
1274 | break; | |
1275 | ||
1276 | case 2: | |
1277 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1278 | fwd->listen_port = a2port(fwdarg[1]); | |
1279 | fwd->connect_host = xstrdup("socks"); | |
1280 | break; | |
1281 | ||
3867aa0a | 1282 | case 3: |
1283 | fwd->listen_host = NULL; | |
1284 | fwd->listen_port = a2port(fwdarg[0]); | |
1285 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1286 | fwd->connect_port = a2port(fwdarg[2]); | |
1287 | break; | |
1288 | ||
1289 | case 4: | |
1290 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1291 | fwd->listen_port = a2port(fwdarg[1]); | |
1292 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1293 | fwd->connect_port = a2port(fwdarg[3]); | |
1294 | break; | |
1295 | default: | |
1296 | i = 0; /* failure */ | |
1297 | } | |
1298 | ||
1299 | xfree(p); | |
1300 | ||
30573fea | 1301 | if (dynamicfwd) { |
1302 | if (!(i == 1 || i == 2)) | |
1303 | goto fail_free; | |
1304 | } else { | |
1305 | if (!(i == 3 || i == 4)) | |
1306 | goto fail_free; | |
5134115d | 1307 | if (fwd->connect_port <= 0) |
30573fea | 1308 | goto fail_free; |
1309 | } | |
1310 | ||
17525a70 | 1311 | if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0)) |
3867aa0a | 1312 | goto fail_free; |
1313 | ||
1314 | if (fwd->connect_host != NULL && | |
1315 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1316 | goto fail_free; | |
17525a70 | 1317 | if (fwd->listen_host != NULL && |
1318 | strlen(fwd->listen_host) >= NI_MAXHOST) | |
1319 | goto fail_free; | |
1320 | ||
3867aa0a | 1321 | |
1322 | return (i); | |
1323 | ||
1324 | fail_free: | |
bab3d903 | 1325 | if (fwd->connect_host != NULL) { |
3867aa0a | 1326 | xfree(fwd->connect_host); |
bab3d903 | 1327 | fwd->connect_host = NULL; |
1328 | } | |
1329 | if (fwd->listen_host != NULL) { | |
3867aa0a | 1330 | xfree(fwd->listen_host); |
bab3d903 | 1331 | fwd->listen_host = NULL; |
1332 | } | |
3867aa0a | 1333 | return (0); |
1334 | } |