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3c0ef626 | 1 | /* |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * Functions for reading the configuration files. | |
6 | * | |
7 | * As far as I am concerned, the code I have written for this software | |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
12 | */ | |
13 | ||
14 | #include "includes.h" | |
2c06c99b | 15 | RCSID("$OpenBSD: readconf.c,v 1.145 2005/12/08 18:34:11 reyk Exp $"); |
3c0ef626 | 16 | |
17 | #include "ssh.h" | |
18 | #include "xmalloc.h" | |
19 | #include "compat.h" | |
20 | #include "cipher.h" | |
21 | #include "pathnames.h" | |
22 | #include "log.h" | |
23 | #include "readconf.h" | |
24 | #include "match.h" | |
25 | #include "misc.h" | |
26 | #include "kex.h" | |
27 | #include "mac.h" | |
28 | ||
29 | /* Format of the configuration file: | |
30 | ||
31 | # Configuration data is parsed as follows: | |
32 | # 1. command line options | |
33 | # 2. user-specific file | |
34 | # 3. system-wide file | |
35 | # Any configuration value is only changed the first time it is set. | |
36 | # Thus, host-specific definitions should be at the beginning of the | |
37 | # configuration file, and defaults at the end. | |
38 | ||
39 | # Host-specific declarations. These may override anything above. A single | |
40 | # host may match multiple declarations; these are processed in the order | |
41 | # that they are given in. | |
42 | ||
43 | Host *.ngs.fi ngs.fi | |
f5799ae1 | 44 | User foo |
3c0ef626 | 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 | |
3c0ef626 | 60 | PasswordAuthentication no |
61 | ||
62 | Host puukko.hut.fi | |
63 | User t35124p | |
64 | ProxyCommand ssh-proxy %h %p | |
65 | ||
66 | Host *.fr | |
f5799ae1 | 67 | PublicKeyAuthentication no |
3c0ef626 | 68 | |
69 | Host *.su | |
70 | Cipher none | |
71 | PasswordAuthentication no | |
72 | ||
2c06c99b | 73 | Host vpn.fake.com |
74 | Tunnel yes | |
75 | TunnelDevice 3 | |
76 | ||
3c0ef626 | 77 | # Defaults for various options |
78 | Host * | |
79 | ForwardAgent no | |
80 | ForwardX11 no | |
3c0ef626 | 81 | PasswordAuthentication yes |
82 | RSAAuthentication yes | |
83 | RhostsRSAAuthentication yes | |
3c0ef626 | 84 | StrictHostKeyChecking yes |
cdd66111 | 85 | TcpKeepAlive no |
3c0ef626 | 86 | IdentityFile ~/.ssh/identity |
87 | Port 22 | |
88 | EscapeChar ~ | |
89 | ||
90 | */ | |
91 | ||
92 | /* Keyword tokens. */ | |
93 | ||
94 | typedef enum { | |
95 | oBadOption, | |
cdd66111 | 96 | oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, |
f5799ae1 | 97 | oPasswordAuthentication, oRSAAuthentication, |
3c0ef626 | 98 | oChallengeResponseAuthentication, oXAuthLocation, |
3c0ef626 | 99 | oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, |
100 | oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, | |
101 | oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, | |
102 | oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, | |
cdd66111 | 103 | oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, |
3c0ef626 | 104 | oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
105 | oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, | |
106 | oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, | |
107 | oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, | |
108 | oHostKeyAlgorithms, oBindAddress, oSmartcardDevice, | |
f5799ae1 | 109 | oClearAllForwardings, oNoHostAuthenticationForLocalhost, |
0fff78ff | 110 | oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, |
111 | oAddressFamily, oGssAuthentication, oGssDelegateCreds, | |
99be0775 | 112 | oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, |
996d5e62 | 113 | oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, |
2c06c99b | 114 | oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, |
d4e9cd2c | 115 | oNoneEnabled, oTcpRcvBufPoll, oTcpRcvBuf, oNoneSwitch, oHPNDisabled, |
116 | oHPNBufferSize, | |
0fff78ff | 117 | oDeprecated, oUnsupported |
3c0ef626 | 118 | } OpCodes; |
119 | ||
120 | /* Textual representations of the tokens. */ | |
121 | ||
122 | static struct { | |
123 | const char *name; | |
124 | OpCodes opcode; | |
125 | } keywords[] = { | |
126 | { "forwardagent", oForwardAgent }, | |
127 | { "forwardx11", oForwardX11 }, | |
cdd66111 | 128 | { "forwardx11trusted", oForwardX11Trusted }, |
3c0ef626 | 129 | { "xauthlocation", oXAuthLocation }, |
130 | { "gatewayports", oGatewayPorts }, | |
131 | { "useprivilegedport", oUsePrivilegedPort }, | |
0fff78ff | 132 | { "rhostsauthentication", oDeprecated }, |
3c0ef626 | 133 | { "passwordauthentication", oPasswordAuthentication }, |
134 | { "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, | |
135 | { "kbdinteractivedevices", oKbdInteractiveDevices }, | |
136 | { "rsaauthentication", oRSAAuthentication }, | |
137 | { "pubkeyauthentication", oPubkeyAuthentication }, | |
138 | { "dsaauthentication", oPubkeyAuthentication }, /* alias */ | |
139 | { "rhostsrsaauthentication", oRhostsRSAAuthentication }, | |
140 | { "hostbasedauthentication", oHostbasedAuthentication }, | |
141 | { "challengeresponseauthentication", oChallengeResponseAuthentication }, | |
142 | { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ | |
143 | { "tisauthentication", oChallengeResponseAuthentication }, /* alias */ | |
0fff78ff | 144 | { "kerberosauthentication", oUnsupported }, |
145 | { "kerberostgtpassing", oUnsupported }, | |
146 | { "afstokenpassing", oUnsupported }, | |
147 | #if defined(GSSAPI) | |
148 | { "gssapiauthentication", oGssAuthentication }, | |
149 | { "gssapidelegatecredentials", oGssDelegateCreds }, | |
150 | #else | |
151 | { "gssapiauthentication", oUnsupported }, | |
152 | { "gssapidelegatecredentials", oUnsupported }, | |
3c0ef626 | 153 | #endif |
f5799ae1 | 154 | { "fallbacktorsh", oDeprecated }, |
155 | { "usersh", oDeprecated }, | |
3c0ef626 | 156 | { "identityfile", oIdentityFile }, |
157 | { "identityfile2", oIdentityFile }, /* alias */ | |
99be0775 | 158 | { "identitiesonly", oIdentitiesOnly }, |
3c0ef626 | 159 | { "hostname", oHostName }, |
160 | { "hostkeyalias", oHostKeyAlias }, | |
161 | { "proxycommand", oProxyCommand }, | |
162 | { "port", oPort }, | |
163 | { "cipher", oCipher }, | |
164 | { "ciphers", oCiphers }, | |
165 | { "macs", oMacs }, | |
166 | { "protocol", oProtocol }, | |
167 | { "remoteforward", oRemoteForward }, | |
168 | { "localforward", oLocalForward }, | |
169 | { "user", oUser }, | |
170 | { "host", oHost }, | |
171 | { "escapechar", oEscapeChar }, | |
172 | { "globalknownhostsfile", oGlobalKnownHostsFile }, | |
173 | { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ | |
174 | { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, | |
175 | { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ | |
176 | { "connectionattempts", oConnectionAttempts }, | |
177 | { "batchmode", oBatchMode }, | |
178 | { "checkhostip", oCheckHostIP }, | |
179 | { "stricthostkeychecking", oStrictHostKeyChecking }, | |
180 | { "compression", oCompression }, | |
181 | { "compressionlevel", oCompressionLevel }, | |
cdd66111 | 182 | { "tcpkeepalive", oTCPKeepAlive }, |
183 | { "keepalive", oTCPKeepAlive }, /* obsolete */ | |
3c0ef626 | 184 | { "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
185 | { "loglevel", oLogLevel }, | |
186 | { "dynamicforward", oDynamicForward }, | |
187 | { "preferredauthentications", oPreferredAuthentications }, | |
188 | { "hostkeyalgorithms", oHostKeyAlgorithms }, | |
189 | { "bindaddress", oBindAddress }, | |
0fff78ff | 190 | #ifdef SMARTCARD |
3c0ef626 | 191 | { "smartcarddevice", oSmartcardDevice }, |
0fff78ff | 192 | #else |
193 | { "smartcarddevice", oUnsupported }, | |
194 | #endif | |
e9a17296 | 195 | { "clearallforwardings", oClearAllForwardings }, |
6a9b3198 | 196 | { "enablesshkeysign", oEnableSSHKeysign }, |
0fff78ff | 197 | { "verifyhostkeydns", oVerifyHostKeyDNS }, |
e9a17296 | 198 | { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost }, |
0fff78ff | 199 | { "rekeylimit", oRekeyLimit }, |
200 | { "connecttimeout", oConnectTimeout }, | |
201 | { "addressfamily", oAddressFamily }, | |
cdd66111 | 202 | { "serveraliveinterval", oServerAliveInterval }, |
203 | { "serveralivecountmax", oServerAliveCountMax }, | |
c9f39d2c | 204 | { "sendenv", oSendEnv }, |
205 | { "controlpath", oControlPath }, | |
206 | { "controlmaster", oControlMaster }, | |
996d5e62 | 207 | { "hashknownhosts", oHashKnownHosts }, |
2c06c99b | 208 | { "tunnel", oTunnel }, |
209 | { "tunneldevice", oTunnelDevice }, | |
210 | { "localcommand", oLocalCommand }, | |
211 | { "permitlocalcommand", oPermitLocalCommand }, | |
d4e9cd2c | 212 | { "noneenabled", oNoneEnabled }, |
213 | { "tcprcvbufpoll", oTcpRcvBufPoll }, | |
214 | { "tcprcvbuf", oTcpRcvBuf }, | |
215 | { "noneswitch", oNoneSwitch }, | |
216 | { "hpndisabled", oHPNDisabled }, | |
217 | { "hpnbuffersize", oHPNBufferSize }, | |
e9a17296 | 218 | { NULL, oBadOption } |
3c0ef626 | 219 | }; |
220 | ||
221 | /* | |
222 | * Adds a local TCP/IP port forward to options. Never returns if there is an | |
223 | * error. | |
224 | */ | |
225 | ||
226 | void | |
996d5e62 | 227 | add_local_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 228 | { |
229 | Forward *fwd; | |
41b2f314 | 230 | #ifndef NO_IPPORT_RESERVED_CONCEPT |
3c0ef626 | 231 | extern uid_t original_real_uid; |
996d5e62 | 232 | if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) |
3c0ef626 | 233 | fatal("Privileged ports can only be forwarded by root."); |
234 | #endif | |
235 | if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
236 | fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); | |
237 | fwd = &options->local_forwards[options->num_local_forwards++]; | |
996d5e62 | 238 | |
239 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
240 | NULL : xstrdup(newfwd->listen_host); | |
241 | fwd->listen_port = newfwd->listen_port; | |
242 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
243 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 244 | } |
245 | ||
246 | /* | |
247 | * Adds a remote TCP/IP port forward to options. Never returns if there is | |
248 | * an error. | |
249 | */ | |
250 | ||
251 | void | |
996d5e62 | 252 | add_remote_forward(Options *options, const Forward *newfwd) |
3c0ef626 | 253 | { |
254 | Forward *fwd; | |
255 | if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) | |
256 | fatal("Too many remote forwards (max %d).", | |
e9a17296 | 257 | SSH_MAX_FORWARDS_PER_DIRECTION); |
3c0ef626 | 258 | fwd = &options->remote_forwards[options->num_remote_forwards++]; |
996d5e62 | 259 | |
260 | fwd->listen_host = (newfwd->listen_host == NULL) ? | |
261 | NULL : xstrdup(newfwd->listen_host); | |
262 | fwd->listen_port = newfwd->listen_port; | |
263 | fwd->connect_host = xstrdup(newfwd->connect_host); | |
264 | fwd->connect_port = newfwd->connect_port; | |
3c0ef626 | 265 | } |
266 | ||
267 | static void | |
268 | clear_forwardings(Options *options) | |
269 | { | |
270 | int i; | |
271 | ||
996d5e62 | 272 | for (i = 0; i < options->num_local_forwards; i++) { |
dec6d9fe | 273 | if (options->local_forwards[i].listen_host != NULL) |
274 | xfree(options->local_forwards[i].listen_host); | |
996d5e62 | 275 | xfree(options->local_forwards[i].connect_host); |
276 | } | |
3c0ef626 | 277 | options->num_local_forwards = 0; |
996d5e62 | 278 | for (i = 0; i < options->num_remote_forwards; i++) { |
dec6d9fe | 279 | if (options->remote_forwards[i].listen_host != NULL) |
280 | xfree(options->remote_forwards[i].listen_host); | |
996d5e62 | 281 | xfree(options->remote_forwards[i].connect_host); |
282 | } | |
3c0ef626 | 283 | options->num_remote_forwards = 0; |
2c06c99b | 284 | options->tun_open = SSH_TUNMODE_NO; |
3c0ef626 | 285 | } |
286 | ||
287 | /* | |
288 | * Returns the number of the token pointed to by cp or oBadOption. | |
289 | */ | |
290 | ||
291 | static OpCodes | |
292 | parse_token(const char *cp, const char *filename, int linenum) | |
293 | { | |
294 | u_int i; | |
295 | ||
296 | for (i = 0; keywords[i].name; i++) | |
297 | if (strcasecmp(cp, keywords[i].name) == 0) | |
298 | return keywords[i].opcode; | |
299 | ||
300 | error("%s: line %d: Bad configuration option: %s", | |
301 | filename, linenum, cp); | |
302 | return oBadOption; | |
303 | } | |
304 | ||
305 | /* | |
306 | * Processes a single option line as used in the configuration files. This | |
307 | * only sets those values that have not already been set. | |
308 | */ | |
6a9b3198 | 309 | #define WHITESPACE " \t\r\n" |
3c0ef626 | 310 | |
311 | int | |
312 | process_config_line(Options *options, const char *host, | |
313 | char *line, const char *filename, int linenum, | |
314 | int *activep) | |
315 | { | |
996d5e62 | 316 | char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; |
2c06c99b | 317 | int opcode, *intptr, value, value2; |
6a9b3198 | 318 | size_t len; |
996d5e62 | 319 | Forward fwd; |
3c0ef626 | 320 | |
0fff78ff | 321 | /* Strip trailing whitespace */ |
dec6d9fe | 322 | for (len = strlen(line) - 1; len > 0; len--) { |
0fff78ff | 323 | if (strchr(WHITESPACE, line[len]) == NULL) |
324 | break; | |
325 | line[len] = '\0'; | |
326 | } | |
327 | ||
3c0ef626 | 328 | s = line; |
329 | /* Get the keyword. (Each line is supposed to begin with a keyword). */ | |
330 | keyword = strdelim(&s); | |
331 | /* Ignore leading whitespace. */ | |
332 | if (*keyword == '\0') | |
333 | keyword = strdelim(&s); | |
334 | if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') | |
335 | return 0; | |
336 | ||
337 | opcode = parse_token(keyword, filename, linenum); | |
338 | ||
339 | switch (opcode) { | |
340 | case oBadOption: | |
341 | /* don't panic, but count bad options */ | |
342 | return -1; | |
343 | /* NOTREACHED */ | |
0fff78ff | 344 | case oConnectTimeout: |
345 | intptr = &options->connection_timeout; | |
cdd66111 | 346 | parse_time: |
0fff78ff | 347 | arg = strdelim(&s); |
348 | if (!arg || *arg == '\0') | |
349 | fatal("%s line %d: missing time value.", | |
350 | filename, linenum); | |
351 | if ((value = convtime(arg)) == -1) | |
352 | fatal("%s line %d: invalid time value.", | |
353 | filename, linenum); | |
354 | if (*intptr == -1) | |
355 | *intptr = value; | |
356 | break; | |
357 | ||
3c0ef626 | 358 | case oForwardAgent: |
359 | intptr = &options->forward_agent; | |
360 | parse_flag: | |
361 | arg = strdelim(&s); | |
362 | if (!arg || *arg == '\0') | |
363 | fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); | |
364 | value = 0; /* To avoid compiler warning... */ | |
365 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
366 | value = 1; | |
367 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
368 | value = 0; | |
369 | else | |
370 | fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); | |
371 | if (*activep && *intptr == -1) | |
372 | *intptr = value; | |
373 | break; | |
374 | ||
375 | case oForwardX11: | |
376 | intptr = &options->forward_x11; | |
377 | goto parse_flag; | |
378 | ||
cdd66111 | 379 | case oForwardX11Trusted: |
380 | intptr = &options->forward_x11_trusted; | |
381 | goto parse_flag; | |
382 | ||
3c0ef626 | 383 | case oGatewayPorts: |
384 | intptr = &options->gateway_ports; | |
385 | goto parse_flag; | |
386 | ||
387 | case oUsePrivilegedPort: | |
388 | intptr = &options->use_privileged_port; | |
389 | goto parse_flag; | |
390 | ||
3c0ef626 | 391 | case oPasswordAuthentication: |
392 | intptr = &options->password_authentication; | |
393 | goto parse_flag; | |
394 | ||
395 | case oKbdInteractiveAuthentication: | |
396 | intptr = &options->kbd_interactive_authentication; | |
397 | goto parse_flag; | |
398 | ||
399 | case oKbdInteractiveDevices: | |
400 | charptr = &options->kbd_interactive_devices; | |
401 | goto parse_string; | |
402 | ||
403 | case oPubkeyAuthentication: | |
404 | intptr = &options->pubkey_authentication; | |
405 | goto parse_flag; | |
406 | ||
407 | case oRSAAuthentication: | |
408 | intptr = &options->rsa_authentication; | |
409 | goto parse_flag; | |
410 | ||
411 | case oRhostsRSAAuthentication: | |
412 | intptr = &options->rhosts_rsa_authentication; | |
413 | goto parse_flag; | |
414 | ||
415 | case oHostbasedAuthentication: | |
416 | intptr = &options->hostbased_authentication; | |
417 | goto parse_flag; | |
418 | ||
419 | case oChallengeResponseAuthentication: | |
420 | intptr = &options->challenge_response_authentication; | |
421 | goto parse_flag; | |
0fff78ff | 422 | |
423 | case oGssAuthentication: | |
424 | intptr = &options->gss_authentication; | |
3c0ef626 | 425 | goto parse_flag; |
0fff78ff | 426 | |
427 | case oGssDelegateCreds: | |
428 | intptr = &options->gss_deleg_creds; | |
3c0ef626 | 429 | goto parse_flag; |
0fff78ff | 430 | |
3c0ef626 | 431 | case oBatchMode: |
432 | intptr = &options->batch_mode; | |
433 | goto parse_flag; | |
434 | ||
435 | case oCheckHostIP: | |
436 | intptr = &options->check_host_ip; | |
437 | goto parse_flag; | |
438 | ||
d4e9cd2c | 439 | case oNoneEnabled: |
440 | intptr = &options->none_enabled; | |
441 | goto parse_flag; | |
442 | ||
443 | case oNoneSwitch: | |
444 | intptr = &options->none_switch; | |
445 | goto parse_flag; | |
446 | ||
447 | case oHPNDisabled: | |
448 | intptr = &options->hpn_disabled; | |
449 | goto parse_flag; | |
450 | ||
451 | case oHPNBufferSize: | |
452 | intptr = &options->hpn_buffer_size; | |
453 | goto parse_int; | |
454 | ||
455 | case oTcpRcvBufPoll: | |
456 | intptr = &options->tcp_rcv_buf_poll; | |
457 | goto parse_flag; | |
458 | ||
0fff78ff | 459 | case oVerifyHostKeyDNS: |
460 | intptr = &options->verify_host_key_dns; | |
cdd66111 | 461 | goto parse_yesnoask; |
0fff78ff | 462 | |
d4e9cd2c | 463 | |
3c0ef626 | 464 | case oStrictHostKeyChecking: |
465 | intptr = &options->strict_host_key_checking; | |
cdd66111 | 466 | parse_yesnoask: |
3c0ef626 | 467 | arg = strdelim(&s); |
468 | if (!arg || *arg == '\0') | |
469 | fatal("%.200s line %d: Missing yes/no/ask argument.", | |
e9a17296 | 470 | filename, linenum); |
3c0ef626 | 471 | value = 0; /* To avoid compiler warning... */ |
472 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
473 | value = 1; | |
474 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
475 | value = 0; | |
476 | else if (strcmp(arg, "ask") == 0) | |
477 | value = 2; | |
478 | else | |
479 | fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); | |
480 | if (*activep && *intptr == -1) | |
481 | *intptr = value; | |
482 | break; | |
483 | ||
484 | case oCompression: | |
485 | intptr = &options->compression; | |
486 | goto parse_flag; | |
487 | ||
cdd66111 | 488 | case oTCPKeepAlive: |
489 | intptr = &options->tcp_keep_alive; | |
3c0ef626 | 490 | goto parse_flag; |
491 | ||
492 | case oNoHostAuthenticationForLocalhost: | |
493 | intptr = &options->no_host_authentication_for_localhost; | |
494 | goto parse_flag; | |
495 | ||
496 | case oNumberOfPasswordPrompts: | |
497 | intptr = &options->number_of_password_prompts; | |
498 | goto parse_int; | |
499 | ||
500 | case oCompressionLevel: | |
501 | intptr = &options->compression_level; | |
502 | goto parse_int; | |
503 | ||
0fff78ff | 504 | case oRekeyLimit: |
505 | intptr = &options->rekey_limit; | |
506 | arg = strdelim(&s); | |
507 | if (!arg || *arg == '\0') | |
508 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
509 | if (arg[0] < '0' || arg[0] > '9') | |
510 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
511 | value = strtol(arg, &endofnumber, 10); | |
512 | if (arg == endofnumber) | |
513 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
514 | switch (toupper(*endofnumber)) { | |
515 | case 'K': | |
516 | value *= 1<<10; | |
517 | break; | |
518 | case 'M': | |
519 | value *= 1<<20; | |
520 | break; | |
521 | case 'G': | |
522 | value *= 1<<30; | |
523 | break; | |
524 | } | |
525 | if (*activep && *intptr == -1) | |
526 | *intptr = value; | |
527 | break; | |
528 | ||
3c0ef626 | 529 | case oIdentityFile: |
530 | arg = strdelim(&s); | |
531 | if (!arg || *arg == '\0') | |
532 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
533 | if (*activep) { | |
534 | intptr = &options->num_identity_files; | |
535 | if (*intptr >= SSH_MAX_IDENTITY_FILES) | |
536 | fatal("%.200s line %d: Too many identity files specified (max %d).", | |
e9a17296 | 537 | filename, linenum, SSH_MAX_IDENTITY_FILES); |
3c0ef626 | 538 | charptr = &options->identity_files[*intptr]; |
539 | *charptr = xstrdup(arg); | |
540 | *intptr = *intptr + 1; | |
541 | } | |
542 | break; | |
543 | ||
544 | case oXAuthLocation: | |
545 | charptr=&options->xauth_location; | |
546 | goto parse_string; | |
547 | ||
548 | case oUser: | |
549 | charptr = &options->user; | |
550 | parse_string: | |
551 | arg = strdelim(&s); | |
552 | if (!arg || *arg == '\0') | |
553 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
554 | if (*activep && *charptr == NULL) | |
555 | *charptr = xstrdup(arg); | |
556 | break; | |
557 | ||
558 | case oGlobalKnownHostsFile: | |
559 | charptr = &options->system_hostfile; | |
560 | goto parse_string; | |
561 | ||
562 | case oUserKnownHostsFile: | |
563 | charptr = &options->user_hostfile; | |
564 | goto parse_string; | |
565 | ||
566 | case oGlobalKnownHostsFile2: | |
567 | charptr = &options->system_hostfile2; | |
568 | goto parse_string; | |
569 | ||
570 | case oUserKnownHostsFile2: | |
571 | charptr = &options->user_hostfile2; | |
572 | goto parse_string; | |
573 | ||
574 | case oHostName: | |
575 | charptr = &options->hostname; | |
576 | goto parse_string; | |
577 | ||
578 | case oHostKeyAlias: | |
579 | charptr = &options->host_key_alias; | |
580 | goto parse_string; | |
581 | ||
582 | case oPreferredAuthentications: | |
583 | charptr = &options->preferred_authentications; | |
584 | goto parse_string; | |
585 | ||
586 | case oBindAddress: | |
587 | charptr = &options->bind_address; | |
588 | goto parse_string; | |
589 | ||
590 | case oSmartcardDevice: | |
591 | charptr = &options->smartcard_device; | |
592 | goto parse_string; | |
593 | ||
594 | case oProxyCommand: | |
2c06c99b | 595 | charptr = &options->proxy_command; |
596 | parse_command: | |
0fff78ff | 597 | if (s == NULL) |
598 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
6a9b3198 | 599 | len = strspn(s, WHITESPACE "="); |
3c0ef626 | 600 | if (*activep && *charptr == NULL) |
6a9b3198 | 601 | *charptr = xstrdup(s + len); |
3c0ef626 | 602 | return 0; |
603 | ||
604 | case oPort: | |
605 | intptr = &options->port; | |
606 | parse_int: | |
607 | arg = strdelim(&s); | |
608 | if (!arg || *arg == '\0') | |
609 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
610 | if (arg[0] < '0' || arg[0] > '9') | |
611 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
612 | ||
613 | /* Octal, decimal, or hex format? */ | |
614 | value = strtol(arg, &endofnumber, 0); | |
615 | if (arg == endofnumber) | |
616 | fatal("%.200s line %d: Bad number.", filename, linenum); | |
617 | if (*activep && *intptr == -1) | |
618 | *intptr = value; | |
619 | break; | |
620 | ||
621 | case oConnectionAttempts: | |
622 | intptr = &options->connection_attempts; | |
623 | goto parse_int; | |
624 | ||
d4e9cd2c | 625 | case oTcpRcvBuf: |
626 | intptr = &options->tcp_rcv_buf; | |
627 | goto parse_int; | |
628 | ||
3c0ef626 | 629 | case oCipher: |
630 | intptr = &options->cipher; | |
631 | arg = strdelim(&s); | |
632 | if (!arg || *arg == '\0') | |
633 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
634 | value = cipher_number(arg); | |
635 | if (value == -1) | |
636 | fatal("%.200s line %d: Bad cipher '%s'.", | |
e9a17296 | 637 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 638 | if (*activep && *intptr == -1) |
639 | *intptr = value; | |
640 | break; | |
641 | ||
642 | case oCiphers: | |
643 | arg = strdelim(&s); | |
644 | if (!arg || *arg == '\0') | |
645 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
646 | if (!ciphers_valid(arg)) | |
647 | fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", | |
e9a17296 | 648 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 649 | if (*activep && options->ciphers == NULL) |
650 | options->ciphers = xstrdup(arg); | |
651 | break; | |
652 | ||
653 | case oMacs: | |
654 | arg = strdelim(&s); | |
655 | if (!arg || *arg == '\0') | |
656 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
657 | if (!mac_valid(arg)) | |
658 | fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", | |
e9a17296 | 659 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 660 | if (*activep && options->macs == NULL) |
661 | options->macs = xstrdup(arg); | |
662 | break; | |
663 | ||
664 | case oHostKeyAlgorithms: | |
665 | arg = strdelim(&s); | |
666 | if (!arg || *arg == '\0') | |
667 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
668 | if (!key_names_valid2(arg)) | |
669 | fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", | |
e9a17296 | 670 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 671 | if (*activep && options->hostkeyalgorithms == NULL) |
672 | options->hostkeyalgorithms = xstrdup(arg); | |
673 | break; | |
674 | ||
675 | case oProtocol: | |
676 | intptr = &options->protocol; | |
677 | arg = strdelim(&s); | |
678 | if (!arg || *arg == '\0') | |
679 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
680 | value = proto_spec(arg); | |
681 | if (value == SSH_PROTO_UNKNOWN) | |
682 | fatal("%.200s line %d: Bad protocol spec '%s'.", | |
e9a17296 | 683 | filename, linenum, arg ? arg : "<NONE>"); |
3c0ef626 | 684 | if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
685 | *intptr = value; | |
686 | break; | |
687 | ||
688 | case oLogLevel: | |
689 | intptr = (int *) &options->log_level; | |
690 | arg = strdelim(&s); | |
691 | value = log_level_number(arg); | |
e9a17296 | 692 | if (value == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 693 | fatal("%.200s line %d: unsupported log level '%s'", |
e9a17296 | 694 | filename, linenum, arg ? arg : "<NONE>"); |
695 | if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) | |
3c0ef626 | 696 | *intptr = (LogLevel) value; |
697 | break; | |
698 | ||
699 | case oLocalForward: | |
700 | case oRemoteForward: | |
701 | arg = strdelim(&s); | |
996d5e62 | 702 | if (arg == NULL || *arg == '\0') |
3c0ef626 | 703 | fatal("%.200s line %d: Missing port argument.", |
704 | filename, linenum); | |
996d5e62 | 705 | arg2 = strdelim(&s); |
706 | if (arg2 == NULL || *arg2 == '\0') | |
707 | fatal("%.200s line %d: Missing target argument.", | |
3c0ef626 | 708 | filename, linenum); |
996d5e62 | 709 | |
710 | /* construct a string for parse_forward */ | |
711 | snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); | |
712 | ||
713 | if (parse_forward(&fwd, fwdarg) == 0) | |
3c0ef626 | 714 | fatal("%.200s line %d: Bad forwarding specification.", |
715 | filename, linenum); | |
996d5e62 | 716 | |
3c0ef626 | 717 | if (*activep) { |
718 | if (opcode == oLocalForward) | |
996d5e62 | 719 | add_local_forward(options, &fwd); |
3c0ef626 | 720 | else if (opcode == oRemoteForward) |
996d5e62 | 721 | add_remote_forward(options, &fwd); |
3c0ef626 | 722 | } |
723 | break; | |
724 | ||
725 | case oDynamicForward: | |
726 | arg = strdelim(&s); | |
727 | if (!arg || *arg == '\0') | |
728 | fatal("%.200s line %d: Missing port argument.", | |
729 | filename, linenum); | |
996d5e62 | 730 | memset(&fwd, '\0', sizeof(fwd)); |
731 | fwd.connect_host = "socks"; | |
732 | fwd.listen_host = hpdelim(&arg); | |
733 | if (fwd.listen_host == NULL || | |
734 | strlen(fwd.listen_host) >= NI_MAXHOST) | |
735 | fatal("%.200s line %d: Bad forwarding specification.", | |
736 | filename, linenum); | |
737 | if (arg) { | |
738 | fwd.listen_port = a2port(arg); | |
739 | fwd.listen_host = cleanhostname(fwd.listen_host); | |
740 | } else { | |
741 | fwd.listen_port = a2port(fwd.listen_host); | |
665a873d | 742 | fwd.listen_host = NULL; |
996d5e62 | 743 | } |
744 | if (fwd.listen_port == 0) | |
3c0ef626 | 745 | fatal("%.200s line %d: Badly formatted port number.", |
746 | filename, linenum); | |
747 | if (*activep) | |
996d5e62 | 748 | add_local_forward(options, &fwd); |
3c0ef626 | 749 | break; |
750 | ||
751 | case oClearAllForwardings: | |
752 | intptr = &options->clear_forwardings; | |
753 | goto parse_flag; | |
754 | ||
755 | case oHost: | |
756 | *activep = 0; | |
757 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') | |
758 | if (match_pattern(host, arg)) { | |
759 | debug("Applying options for %.100s", arg); | |
760 | *activep = 1; | |
761 | break; | |
762 | } | |
763 | /* Avoid garbage check below, as strdelim is done. */ | |
764 | return 0; | |
765 | ||
766 | case oEscapeChar: | |
767 | intptr = &options->escape_char; | |
768 | arg = strdelim(&s); | |
769 | if (!arg || *arg == '\0') | |
770 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
771 | if (arg[0] == '^' && arg[2] == 0 && | |
772 | (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) | |
773 | value = (u_char) arg[1] & 31; | |
774 | else if (strlen(arg) == 1) | |
775 | value = (u_char) arg[0]; | |
776 | else if (strcmp(arg, "none") == 0) | |
777 | value = SSH_ESCAPECHAR_NONE; | |
778 | else { | |
779 | fatal("%.200s line %d: Bad escape character.", | |
e9a17296 | 780 | filename, linenum); |
3c0ef626 | 781 | /* NOTREACHED */ |
782 | value = 0; /* Avoid compiler warning. */ | |
783 | } | |
784 | if (*activep && *intptr == -1) | |
785 | *intptr = value; | |
786 | break; | |
787 | ||
0fff78ff | 788 | case oAddressFamily: |
789 | arg = strdelim(&s); | |
665a873d | 790 | if (!arg || *arg == '\0') |
791 | fatal("%s line %d: missing address family.", | |
792 | filename, linenum); | |
0fff78ff | 793 | intptr = &options->address_family; |
794 | if (strcasecmp(arg, "inet") == 0) | |
795 | value = AF_INET; | |
796 | else if (strcasecmp(arg, "inet6") == 0) | |
797 | value = AF_INET6; | |
798 | else if (strcasecmp(arg, "any") == 0) | |
799 | value = AF_UNSPEC; | |
800 | else | |
801 | fatal("Unsupported AddressFamily \"%s\"", arg); | |
802 | if (*activep && *intptr == -1) | |
803 | *intptr = value; | |
804 | break; | |
805 | ||
6a9b3198 | 806 | case oEnableSSHKeysign: |
807 | intptr = &options->enable_ssh_keysign; | |
808 | goto parse_flag; | |
809 | ||
99be0775 | 810 | case oIdentitiesOnly: |
811 | intptr = &options->identities_only; | |
812 | goto parse_flag; | |
813 | ||
cdd66111 | 814 | case oServerAliveInterval: |
815 | intptr = &options->server_alive_interval; | |
816 | goto parse_time; | |
817 | ||
818 | case oServerAliveCountMax: | |
819 | intptr = &options->server_alive_count_max; | |
820 | goto parse_int; | |
821 | ||
c9f39d2c | 822 | case oSendEnv: |
823 | while ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
824 | if (strchr(arg, '=') != NULL) | |
825 | fatal("%s line %d: Invalid environment name.", | |
826 | filename, linenum); | |
996d5e62 | 827 | if (!*activep) |
828 | continue; | |
c9f39d2c | 829 | if (options->num_send_env >= MAX_SEND_ENV) |
830 | fatal("%s line %d: too many send env.", | |
831 | filename, linenum); | |
832 | options->send_env[options->num_send_env++] = | |
833 | xstrdup(arg); | |
834 | } | |
835 | break; | |
836 | ||
837 | case oControlPath: | |
838 | charptr = &options->control_path; | |
839 | goto parse_string; | |
840 | ||
841 | case oControlMaster: | |
842 | intptr = &options->control_master; | |
665a873d | 843 | arg = strdelim(&s); |
844 | if (!arg || *arg == '\0') | |
845 | fatal("%.200s line %d: Missing ControlMaster argument.", | |
846 | filename, linenum); | |
847 | value = 0; /* To avoid compiler warning... */ | |
848 | if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) | |
849 | value = SSHCTL_MASTER_YES; | |
850 | else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) | |
851 | value = SSHCTL_MASTER_NO; | |
852 | else if (strcmp(arg, "auto") == 0) | |
853 | value = SSHCTL_MASTER_AUTO; | |
854 | else if (strcmp(arg, "ask") == 0) | |
855 | value = SSHCTL_MASTER_ASK; | |
856 | else if (strcmp(arg, "autoask") == 0) | |
857 | value = SSHCTL_MASTER_AUTO_ASK; | |
858 | else | |
859 | fatal("%.200s line %d: Bad ControlMaster argument.", | |
860 | filename, linenum); | |
861 | if (*activep && *intptr == -1) | |
862 | *intptr = value; | |
863 | break; | |
c9f39d2c | 864 | |
996d5e62 | 865 | case oHashKnownHosts: |
866 | intptr = &options->hash_known_hosts; | |
867 | goto parse_flag; | |
868 | ||
2c06c99b | 869 | case oTunnel: |
870 | intptr = &options->tun_open; | |
871 | arg = strdelim(&s); | |
872 | if (!arg || *arg == '\0') | |
873 | fatal("%s line %d: Missing yes/point-to-point/" | |
874 | "ethernet/no argument.", filename, linenum); | |
875 | value = 0; /* silence compiler */ | |
876 | if (strcasecmp(arg, "ethernet") == 0) | |
877 | value = SSH_TUNMODE_ETHERNET; | |
878 | else if (strcasecmp(arg, "point-to-point") == 0) | |
879 | value = SSH_TUNMODE_POINTOPOINT; | |
880 | else if (strcasecmp(arg, "yes") == 0) | |
881 | value = SSH_TUNMODE_DEFAULT; | |
882 | else if (strcasecmp(arg, "no") == 0) | |
883 | value = SSH_TUNMODE_NO; | |
884 | else | |
885 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
886 | "no argument: %s", filename, linenum, arg); | |
887 | if (*activep) | |
888 | *intptr = value; | |
889 | break; | |
890 | ||
891 | case oTunnelDevice: | |
892 | arg = strdelim(&s); | |
893 | if (!arg || *arg == '\0') | |
894 | fatal("%.200s line %d: Missing argument.", filename, linenum); | |
895 | value = a2tun(arg, &value2); | |
896 | if (value == SSH_TUNID_ERR) | |
897 | fatal("%.200s line %d: Bad tun device.", filename, linenum); | |
898 | if (*activep) { | |
899 | options->tun_local = value; | |
900 | options->tun_remote = value2; | |
901 | } | |
902 | break; | |
903 | ||
904 | case oLocalCommand: | |
905 | charptr = &options->local_command; | |
906 | goto parse_command; | |
907 | ||
908 | case oPermitLocalCommand: | |
909 | intptr = &options->permit_local_command; | |
910 | goto parse_flag; | |
911 | ||
f5799ae1 | 912 | case oDeprecated: |
913 | debug("%s line %d: Deprecated option \"%s\"", | |
914 | filename, linenum, keyword); | |
915 | return 0; | |
916 | ||
0fff78ff | 917 | case oUnsupported: |
918 | error("%s line %d: Unsupported option \"%s\"", | |
919 | filename, linenum, keyword); | |
920 | return 0; | |
921 | ||
3c0ef626 | 922 | default: |
923 | fatal("process_config_line: Unimplemented opcode %d", opcode); | |
924 | } | |
925 | ||
926 | /* Check that there is no garbage at end of line. */ | |
927 | if ((arg = strdelim(&s)) != NULL && *arg != '\0') { | |
928 | fatal("%.200s line %d: garbage at end of line; \"%.200s\".", | |
665a873d | 929 | filename, linenum, arg); |
3c0ef626 | 930 | } |
931 | return 0; | |
932 | } | |
933 | ||
934 | ||
935 | /* | |
936 | * Reads the config file and modifies the options accordingly. Options | |
937 | * should already be initialized before this call. This never returns if | |
938 | * there is an error. If the file does not exist, this returns 0. | |
939 | */ | |
940 | ||
941 | int | |
c9f39d2c | 942 | read_config_file(const char *filename, const char *host, Options *options, |
943 | int checkperm) | |
3c0ef626 | 944 | { |
945 | FILE *f; | |
946 | char line[1024]; | |
947 | int active, linenum; | |
948 | int bad_options = 0; | |
949 | ||
950 | /* Open the file. */ | |
c9f39d2c | 951 | if ((f = fopen(filename, "r")) == NULL) |
3c0ef626 | 952 | return 0; |
953 | ||
c9f39d2c | 954 | if (checkperm) { |
955 | struct stat sb; | |
956 | ||
957 | if (fstat(fileno(f), &sb) == -1) | |
958 | fatal("fstat %s: %s", filename, strerror(errno)); | |
959 | if (((sb.st_uid != 0 && sb.st_uid != getuid()) || | |
960 | (sb.st_mode & 022) != 0)) | |
961 | fatal("Bad owner or permissions on %s", filename); | |
962 | } | |
963 | ||
3c0ef626 | 964 | debug("Reading configuration data %.200s", filename); |
965 | ||
966 | /* | |
967 | * Mark that we are now processing the options. This flag is turned | |
968 | * on/off by Host specifications. | |
969 | */ | |
970 | active = 1; | |
971 | linenum = 0; | |
972 | while (fgets(line, sizeof(line), f)) { | |
973 | /* Update line number counter. */ | |
974 | linenum++; | |
975 | if (process_config_line(options, host, line, filename, linenum, &active) != 0) | |
976 | bad_options++; | |
977 | } | |
978 | fclose(f); | |
979 | if (bad_options > 0) | |
980 | fatal("%s: terminating, %d bad configuration options", | |
e9a17296 | 981 | filename, bad_options); |
3c0ef626 | 982 | return 1; |
983 | } | |
984 | ||
985 | /* | |
986 | * Initializes options to special values that indicate that they have not yet | |
987 | * been set. Read_config_file will only set options with this value. Options | |
988 | * are processed in the following order: command line, user config file, | |
989 | * system config file. Last, fill_default_options is called. | |
990 | */ | |
991 | ||
992 | void | |
993 | initialize_options(Options * options) | |
994 | { | |
995 | memset(options, 'X', sizeof(*options)); | |
996 | options->forward_agent = -1; | |
997 | options->forward_x11 = -1; | |
cdd66111 | 998 | options->forward_x11_trusted = -1; |
3c0ef626 | 999 | options->xauth_location = NULL; |
1000 | options->gateway_ports = -1; | |
1001 | options->use_privileged_port = -1; | |
3c0ef626 | 1002 | options->rsa_authentication = -1; |
1003 | options->pubkey_authentication = -1; | |
1004 | options->challenge_response_authentication = -1; | |
0fff78ff | 1005 | options->gss_authentication = -1; |
1006 | options->gss_deleg_creds = -1; | |
3c0ef626 | 1007 | options->password_authentication = -1; |
1008 | options->kbd_interactive_authentication = -1; | |
1009 | options->kbd_interactive_devices = NULL; | |
1010 | options->rhosts_rsa_authentication = -1; | |
1011 | options->hostbased_authentication = -1; | |
3c0ef626 | 1012 | options->batch_mode = -1; |
1013 | options->check_host_ip = -1; | |
1014 | options->strict_host_key_checking = -1; | |
1015 | options->compression = -1; | |
cdd66111 | 1016 | options->tcp_keep_alive = -1; |
3c0ef626 | 1017 | options->compression_level = -1; |
1018 | options->port = -1; | |
0fff78ff | 1019 | options->address_family = -1; |
3c0ef626 | 1020 | options->connection_attempts = -1; |
0fff78ff | 1021 | options->connection_timeout = -1; |
3c0ef626 | 1022 | options->number_of_password_prompts = -1; |
1023 | options->cipher = -1; | |
1024 | options->ciphers = NULL; | |
1025 | options->macs = NULL; | |
1026 | options->hostkeyalgorithms = NULL; | |
1027 | options->protocol = SSH_PROTO_UNKNOWN; | |
1028 | options->num_identity_files = 0; | |
1029 | options->hostname = NULL; | |
1030 | options->host_key_alias = NULL; | |
1031 | options->proxy_command = NULL; | |
1032 | options->user = NULL; | |
1033 | options->escape_char = -1; | |
1034 | options->system_hostfile = NULL; | |
1035 | options->user_hostfile = NULL; | |
1036 | options->system_hostfile2 = NULL; | |
1037 | options->user_hostfile2 = NULL; | |
1038 | options->num_local_forwards = 0; | |
1039 | options->num_remote_forwards = 0; | |
1040 | options->clear_forwardings = -1; | |
e9a17296 | 1041 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
3c0ef626 | 1042 | options->preferred_authentications = NULL; |
1043 | options->bind_address = NULL; | |
1044 | options->smartcard_device = NULL; | |
6a9b3198 | 1045 | options->enable_ssh_keysign = - 1; |
3c0ef626 | 1046 | options->no_host_authentication_for_localhost = - 1; |
99be0775 | 1047 | options->identities_only = - 1; |
0fff78ff | 1048 | options->rekey_limit = - 1; |
1049 | options->verify_host_key_dns = -1; | |
cdd66111 | 1050 | options->server_alive_interval = -1; |
1051 | options->server_alive_count_max = -1; | |
c9f39d2c | 1052 | options->num_send_env = 0; |
1053 | options->control_path = NULL; | |
1054 | options->control_master = -1; | |
996d5e62 | 1055 | options->hash_known_hosts = -1; |
2c06c99b | 1056 | options->tun_open = -1; |
1057 | options->tun_local = -1; | |
1058 | options->tun_remote = -1; | |
1059 | options->local_command = NULL; | |
1060 | options->permit_local_command = -1; | |
d4e9cd2c | 1061 | options->none_switch = -1; |
1062 | options->none_enabled = -1; | |
1063 | options->hpn_disabled = -1; | |
1064 | options->hpn_buffer_size = -1; | |
1065 | options->tcp_rcv_buf_poll = -1; | |
1066 | options->tcp_rcv_buf = -1; | |
3c0ef626 | 1067 | } |
1068 | ||
1069 | /* | |
1070 | * Called after processing other sources of option data, this fills those | |
1071 | * options for which no value has been specified with their default values. | |
1072 | */ | |
1073 | ||
1074 | void | |
1075 | fill_default_options(Options * options) | |
1076 | { | |
1077 | int len; | |
1078 | ||
1079 | if (options->forward_agent == -1) | |
1080 | options->forward_agent = 0; | |
1081 | if (options->forward_x11 == -1) | |
1082 | options->forward_x11 = 0; | |
cdd66111 | 1083 | if (options->forward_x11_trusted == -1) |
1084 | options->forward_x11_trusted = 0; | |
3c0ef626 | 1085 | if (options->xauth_location == NULL) |
1086 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 1087 | if (options->gateway_ports == -1) |
1088 | options->gateway_ports = 0; | |
1089 | if (options->use_privileged_port == -1) | |
1090 | options->use_privileged_port = 0; | |
3c0ef626 | 1091 | if (options->rsa_authentication == -1) |
1092 | options->rsa_authentication = 1; | |
1093 | if (options->pubkey_authentication == -1) | |
1094 | options->pubkey_authentication = 1; | |
1095 | if (options->challenge_response_authentication == -1) | |
1096 | options->challenge_response_authentication = 1; | |
0fff78ff | 1097 | if (options->gss_authentication == -1) |
cdd66111 | 1098 | options->gss_authentication = 0; |
0fff78ff | 1099 | if (options->gss_deleg_creds == -1) |
1100 | options->gss_deleg_creds = 0; | |
3c0ef626 | 1101 | if (options->password_authentication == -1) |
1102 | options->password_authentication = 1; | |
1103 | if (options->kbd_interactive_authentication == -1) | |
1104 | options->kbd_interactive_authentication = 1; | |
1105 | if (options->rhosts_rsa_authentication == -1) | |
f5799ae1 | 1106 | options->rhosts_rsa_authentication = 0; |
3c0ef626 | 1107 | if (options->hostbased_authentication == -1) |
1108 | options->hostbased_authentication = 0; | |
3c0ef626 | 1109 | if (options->batch_mode == -1) |
1110 | options->batch_mode = 0; | |
1111 | if (options->check_host_ip == -1) | |
1112 | options->check_host_ip = 1; | |
1113 | if (options->strict_host_key_checking == -1) | |
1114 | options->strict_host_key_checking = 2; /* 2 is default */ | |
1115 | if (options->compression == -1) | |
1116 | options->compression = 0; | |
cdd66111 | 1117 | if (options->tcp_keep_alive == -1) |
1118 | options->tcp_keep_alive = 1; | |
3c0ef626 | 1119 | if (options->compression_level == -1) |
1120 | options->compression_level = 6; | |
1121 | if (options->port == -1) | |
1122 | options->port = 0; /* Filled in ssh_connect. */ | |
0fff78ff | 1123 | if (options->address_family == -1) |
1124 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 1125 | if (options->connection_attempts == -1) |
1126 | options->connection_attempts = 1; | |
1127 | if (options->number_of_password_prompts == -1) | |
1128 | options->number_of_password_prompts = 3; | |
1129 | /* Selected in ssh_login(). */ | |
1130 | if (options->cipher == -1) | |
1131 | options->cipher = SSH_CIPHER_NOT_SET; | |
1132 | /* options->ciphers, default set in myproposals.h */ | |
1133 | /* options->macs, default set in myproposals.h */ | |
1134 | /* options->hostkeyalgorithms, default set in myproposals.h */ | |
1135 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
1136 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
1137 | if (options->num_identity_files == 0) { | |
1138 | if (options->protocol & SSH_PROTO_1) { | |
1139 | len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; | |
1140 | options->identity_files[options->num_identity_files] = | |
1141 | xmalloc(len); | |
1142 | snprintf(options->identity_files[options->num_identity_files++], | |
1143 | len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); | |
1144 | } | |
1145 | if (options->protocol & SSH_PROTO_2) { | |
1146 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; | |
1147 | options->identity_files[options->num_identity_files] = | |
1148 | xmalloc(len); | |
1149 | snprintf(options->identity_files[options->num_identity_files++], | |
1150 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); | |
1151 | ||
1152 | len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; | |
1153 | options->identity_files[options->num_identity_files] = | |
1154 | xmalloc(len); | |
1155 | snprintf(options->identity_files[options->num_identity_files++], | |
1156 | len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); | |
1157 | } | |
1158 | } | |
1159 | if (options->escape_char == -1) | |
1160 | options->escape_char = '~'; | |
1161 | if (options->system_hostfile == NULL) | |
1162 | options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; | |
1163 | if (options->user_hostfile == NULL) | |
1164 | options->user_hostfile = _PATH_SSH_USER_HOSTFILE; | |
1165 | if (options->system_hostfile2 == NULL) | |
1166 | options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; | |
1167 | if (options->user_hostfile2 == NULL) | |
1168 | options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; | |
e9a17296 | 1169 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 1170 | options->log_level = SYSLOG_LEVEL_INFO; |
1171 | if (options->clear_forwardings == 1) | |
1172 | clear_forwardings(options); | |
1173 | if (options->no_host_authentication_for_localhost == - 1) | |
1174 | options->no_host_authentication_for_localhost = 0; | |
99be0775 | 1175 | if (options->identities_only == -1) |
1176 | options->identities_only = 0; | |
6a9b3198 | 1177 | if (options->enable_ssh_keysign == -1) |
1178 | options->enable_ssh_keysign = 0; | |
0fff78ff | 1179 | if (options->rekey_limit == -1) |
1180 | options->rekey_limit = 0; | |
1181 | if (options->verify_host_key_dns == -1) | |
1182 | options->verify_host_key_dns = 0; | |
cdd66111 | 1183 | if (options->server_alive_interval == -1) |
1184 | options->server_alive_interval = 0; | |
1185 | if (options->server_alive_count_max == -1) | |
1186 | options->server_alive_count_max = 3; | |
e90c2d47 | 1187 | if (options->none_switch == -1) |
1188 | options->none_switch = 0; | |
d4e9cd2c | 1189 | if (options->hpn_disabled == -1) |
1190 | options->hpn_disabled = 0; | |
1191 | if (options->hpn_buffer_size == -1) | |
1192 | options->hpn_buffer_size = 2*1024*1024; | |
1193 | else { | |
1194 | if (options->hpn_buffer_size == 0) | |
1195 | options->hpn_buffer_size = 1; | |
1196 | /*limit the buffer to 7MB*/ | |
1197 | if (options->hpn_buffer_size > 7168) | |
1198 | options->hpn_buffer_size = 7168; | |
1199 | options->hpn_buffer_size *=1024; | |
1200 | } | |
1201 | if (options->tcp_rcv_buf == 0) | |
1202 | options->tcp_rcv_buf = 1; | |
1203 | if (options->tcp_rcv_buf > -1) | |
1204 | options->tcp_rcv_buf *=1024; | |
c9f39d2c | 1205 | if (options->control_master == -1) |
1206 | options->control_master = 0; | |
996d5e62 | 1207 | if (options->hash_known_hosts == -1) |
1208 | options->hash_known_hosts = 0; | |
2c06c99b | 1209 | if (options->tun_open == -1) |
1210 | options->tun_open = SSH_TUNMODE_NO; | |
1211 | if (options->tun_local == -1) | |
1212 | options->tun_local = SSH_TUNID_ANY; | |
1213 | if (options->tun_remote == -1) | |
1214 | options->tun_remote = SSH_TUNID_ANY; | |
1215 | if (options->permit_local_command == -1) | |
1216 | options->permit_local_command = 0; | |
1217 | /* options->local_command should not be set by default */ | |
3c0ef626 | 1218 | /* options->proxy_command should not be set by default */ |
1219 | /* options->user will be set in the main program if appropriate */ | |
1220 | /* options->hostname will be set in the main program if appropriate */ | |
1221 | /* options->host_key_alias should not be set by default */ | |
1222 | /* options->preferred_authentications will be set in ssh */ | |
1223 | } | |
996d5e62 | 1224 | |
1225 | /* | |
1226 | * parse_forward | |
1227 | * parses a string containing a port forwarding specification of the form: | |
1228 | * [listenhost:]listenport:connecthost:connectport | |
1229 | * returns number of arguments parsed or zero on error | |
1230 | */ | |
1231 | int | |
1232 | parse_forward(Forward *fwd, const char *fwdspec) | |
1233 | { | |
1234 | int i; | |
1235 | char *p, *cp, *fwdarg[4]; | |
1236 | ||
1237 | memset(fwd, '\0', sizeof(*fwd)); | |
1238 | ||
1239 | cp = p = xstrdup(fwdspec); | |
1240 | ||
1241 | /* skip leading spaces */ | |
1242 | while (*cp && isspace(*cp)) | |
1243 | cp++; | |
1244 | ||
1245 | for (i = 0; i < 4; ++i) | |
1246 | if ((fwdarg[i] = hpdelim(&cp)) == NULL) | |
1247 | break; | |
1248 | ||
1249 | /* Check for trailing garbage in 4-arg case*/ | |
1250 | if (cp != NULL) | |
1251 | i = 0; /* failure */ | |
1252 | ||
1253 | switch (i) { | |
1254 | case 3: | |
1255 | fwd->listen_host = NULL; | |
1256 | fwd->listen_port = a2port(fwdarg[0]); | |
1257 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); | |
1258 | fwd->connect_port = a2port(fwdarg[2]); | |
1259 | break; | |
1260 | ||
1261 | case 4: | |
1262 | fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); | |
1263 | fwd->listen_port = a2port(fwdarg[1]); | |
1264 | fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); | |
1265 | fwd->connect_port = a2port(fwdarg[3]); | |
1266 | break; | |
1267 | default: | |
1268 | i = 0; /* failure */ | |
1269 | } | |
1270 | ||
1271 | xfree(p); | |
1272 | ||
1273 | if (fwd->listen_port == 0 && fwd->connect_port == 0) | |
1274 | goto fail_free; | |
1275 | ||
1276 | if (fwd->connect_host != NULL && | |
1277 | strlen(fwd->connect_host) >= NI_MAXHOST) | |
1278 | goto fail_free; | |
1279 | ||
1280 | return (i); | |
1281 | ||
1282 | fail_free: | |
1283 | if (fwd->connect_host != NULL) | |
1284 | xfree(fwd->connect_host); | |
1285 | if (fwd->listen_host != NULL) | |
1286 | xfree(fwd->listen_host); | |
1287 | return (0); | |
1288 | } |