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1 | /* | |
2 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
3 | * All rights reserved | |
4 | * | |
5 | * As far as I am concerned, the code I have written for this software | |
6 | * can be used freely for any purpose. Any derived versions of this | |
7 | * software must be clearly marked as such, and if the derived work is | |
8 | * incompatible with the protocol description in the RFC file, it must be | |
9 | * called by a name other than "ssh" or "Secure Shell". | |
10 | */ | |
11 | ||
12 | #include "includes.h" | |
13 | RCSID("$OpenBSD: servconf.c,v 1.71 2001/03/05 15:44:51 stevesk Exp $"); | |
14 | ||
15 | #ifdef KRB4 | |
16 | #include <krb.h> | |
17 | #endif | |
18 | #ifdef AFS | |
19 | #include <kafs.h> | |
20 | #endif | |
21 | ||
22 | #include "ssh.h" | |
23 | #include "log.h" | |
24 | #include "servconf.h" | |
25 | #include "xmalloc.h" | |
26 | #include "compat.h" | |
27 | #include "pathnames.h" | |
28 | #include "tildexpand.h" | |
29 | #include "misc.h" | |
30 | #include "cipher.h" | |
31 | #include "kex.h" | |
32 | #include "mac.h" | |
33 | ||
34 | /* add listen address */ | |
35 | void add_listen_addr(ServerOptions *options, char *addr); | |
36 | ||
37 | /* AF_UNSPEC or AF_INET or AF_INET6 */ | |
38 | extern int IPv4or6; | |
39 | ||
40 | /* Initializes the server options to their default values. */ | |
41 | ||
42 | void | |
43 | initialize_server_options(ServerOptions *options) | |
44 | { | |
45 | memset(options, 0, sizeof(*options)); | |
46 | options->num_ports = 0; | |
47 | options->ports_from_cmdline = 0; | |
48 | options->listen_addrs = NULL; | |
49 | options->num_host_key_files = 0; | |
50 | options->pid_file = NULL; | |
51 | options->server_key_bits = -1; | |
52 | options->login_grace_time = -1; | |
53 | options->key_regeneration_time = -1; | |
54 | options->permit_root_login = PERMIT_NOT_SET; | |
55 | options->ignore_rhosts = -1; | |
56 | options->ignore_user_known_hosts = -1; | |
57 | options->print_motd = -1; | |
58 | options->check_mail = -1; | |
59 | options->x11_forwarding = -1; | |
60 | options->x11_display_offset = -1; | |
61 | options->xauth_location = NULL; | |
62 | options->strict_modes = -1; | |
63 | options->keepalives = -1; | |
64 | options->log_facility = (SyslogFacility) - 1; | |
65 | options->log_level = (LogLevel) - 1; | |
66 | options->rhosts_authentication = -1; | |
67 | options->rhosts_rsa_authentication = -1; | |
68 | options->rsa_authentication = -1; | |
69 | options->pubkey_authentication = -1; | |
70 | #ifdef KRB4 | |
71 | options->kerberos_authentication = -1; | |
72 | options->kerberos_or_local_passwd = -1; | |
73 | options->kerberos_ticket_cleanup = -1; | |
74 | #endif | |
75 | #ifdef AFS | |
76 | options->kerberos_tgt_passing = -1; | |
77 | options->afs_token_passing = -1; | |
78 | #endif | |
79 | options->password_authentication = -1; | |
80 | options->kbd_interactive_authentication = -1; | |
81 | options->challenge_reponse_authentication = -1; | |
82 | options->permit_empty_passwd = -1; | |
83 | options->use_login = -1; | |
84 | options->allow_tcp_forwarding = -1; | |
85 | options->num_allow_users = 0; | |
86 | options->num_deny_users = 0; | |
87 | options->num_allow_groups = 0; | |
88 | options->num_deny_groups = 0; | |
89 | options->ciphers = NULL; | |
90 | options->macs = NULL; | |
91 | options->protocol = SSH_PROTO_UNKNOWN; | |
92 | options->gateway_ports = -1; | |
93 | options->num_subsystems = 0; | |
94 | options->max_startups_begin = -1; | |
95 | options->max_startups_rate = -1; | |
96 | options->max_startups = -1; | |
97 | options->banner = NULL; | |
98 | options->reverse_mapping_check = -1; | |
99 | } | |
100 | ||
101 | void | |
102 | fill_default_server_options(ServerOptions *options) | |
103 | { | |
104 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
105 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
106 | if (options->num_host_key_files == 0) { | |
107 | /* fill default hostkeys for protocols */ | |
108 | if (options->protocol & SSH_PROTO_1) | |
109 | options->host_key_files[options->num_host_key_files++] = _PATH_HOST_KEY_FILE; | |
110 | if (options->protocol & SSH_PROTO_2) | |
111 | options->host_key_files[options->num_host_key_files++] = _PATH_HOST_DSA_KEY_FILE; | |
112 | } | |
113 | if (options->num_ports == 0) | |
114 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
115 | if (options->listen_addrs == NULL) | |
116 | add_listen_addr(options, NULL); | |
117 | if (options->pid_file == NULL) | |
118 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; | |
119 | if (options->server_key_bits == -1) | |
120 | options->server_key_bits = 768; | |
121 | if (options->login_grace_time == -1) | |
122 | options->login_grace_time = 600; | |
123 | if (options->key_regeneration_time == -1) | |
124 | options->key_regeneration_time = 3600; | |
125 | if (options->permit_root_login == PERMIT_NOT_SET) | |
126 | options->permit_root_login = PERMIT_YES; | |
127 | if (options->ignore_rhosts == -1) | |
128 | options->ignore_rhosts = 1; | |
129 | if (options->ignore_user_known_hosts == -1) | |
130 | options->ignore_user_known_hosts = 0; | |
131 | if (options->check_mail == -1) | |
132 | options->check_mail = 0; | |
133 | if (options->print_motd == -1) | |
134 | options->print_motd = 1; | |
135 | if (options->x11_forwarding == -1) | |
136 | options->x11_forwarding = 0; | |
137 | if (options->x11_display_offset == -1) | |
138 | options->x11_display_offset = 10; | |
139 | #ifdef XAUTH_PATH | |
140 | if (options->xauth_location == NULL) | |
141 | options->xauth_location = XAUTH_PATH; | |
142 | #endif /* XAUTH_PATH */ | |
143 | if (options->strict_modes == -1) | |
144 | options->strict_modes = 1; | |
145 | if (options->keepalives == -1) | |
146 | options->keepalives = 1; | |
147 | if (options->log_facility == (SyslogFacility) (-1)) | |
148 | options->log_facility = SYSLOG_FACILITY_AUTH; | |
149 | if (options->log_level == (LogLevel) (-1)) | |
150 | options->log_level = SYSLOG_LEVEL_INFO; | |
151 | if (options->rhosts_authentication == -1) | |
152 | options->rhosts_authentication = 0; | |
153 | if (options->rhosts_rsa_authentication == -1) | |
154 | options->rhosts_rsa_authentication = 0; | |
155 | if (options->rsa_authentication == -1) | |
156 | options->rsa_authentication = 1; | |
157 | if (options->pubkey_authentication == -1) | |
158 | options->pubkey_authentication = 1; | |
159 | #ifdef KRB4 | |
160 | if (options->kerberos_authentication == -1) | |
161 | options->kerberos_authentication = (access(KEYFILE, R_OK) == 0); | |
162 | if (options->kerberos_or_local_passwd == -1) | |
163 | options->kerberos_or_local_passwd = 1; | |
164 | if (options->kerberos_ticket_cleanup == -1) | |
165 | options->kerberos_ticket_cleanup = 1; | |
166 | #endif /* KRB4 */ | |
167 | #ifdef AFS | |
168 | if (options->kerberos_tgt_passing == -1) | |
169 | options->kerberos_tgt_passing = 0; | |
170 | if (options->afs_token_passing == -1) | |
171 | options->afs_token_passing = k_hasafs(); | |
172 | #endif /* AFS */ | |
173 | if (options->password_authentication == -1) | |
174 | options->password_authentication = 1; | |
175 | if (options->kbd_interactive_authentication == -1) | |
176 | options->kbd_interactive_authentication = 0; | |
177 | if (options->challenge_reponse_authentication == -1) | |
178 | options->challenge_reponse_authentication = 1; | |
179 | if (options->permit_empty_passwd == -1) | |
180 | options->permit_empty_passwd = 0; | |
181 | if (options->use_login == -1) | |
182 | options->use_login = 0; | |
183 | if (options->allow_tcp_forwarding == -1) | |
184 | options->allow_tcp_forwarding = 1; | |
185 | if (options->gateway_ports == -1) | |
186 | options->gateway_ports = 0; | |
187 | if (options->max_startups == -1) | |
188 | options->max_startups = 10; | |
189 | if (options->max_startups_rate == -1) | |
190 | options->max_startups_rate = 100; /* 100% */ | |
191 | if (options->max_startups_begin == -1) | |
192 | options->max_startups_begin = options->max_startups; | |
193 | if (options->reverse_mapping_check == -1) | |
194 | options->reverse_mapping_check = 0; | |
195 | } | |
196 | ||
197 | /* Keyword tokens. */ | |
198 | typedef enum { | |
199 | sBadOption, /* == unknown option */ | |
200 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
201 | sPermitRootLogin, sLogFacility, sLogLevel, | |
202 | sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, | |
203 | #ifdef KRB4 | |
204 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, | |
205 | #endif | |
206 | #ifdef AFS | |
207 | sKerberosTgtPassing, sAFSTokenPassing, | |
208 | #endif | |
209 | sChallengeResponseAuthentication, | |
210 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, | |
211 | sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, | |
212 | sStrictModes, sEmptyPasswd, sKeepAlives, sCheckMail, | |
213 | sUseLogin, sAllowTcpForwarding, | |
214 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, | |
215 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, | |
216 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, | |
217 | sBanner, sReverseMappingCheck | |
218 | } ServerOpCodes; | |
219 | ||
220 | /* Textual representation of the tokens. */ | |
221 | static struct { | |
222 | const char *name; | |
223 | ServerOpCodes opcode; | |
224 | } keywords[] = { | |
225 | { "port", sPort }, | |
226 | { "hostkey", sHostKeyFile }, | |
227 | { "hostdsakey", sHostKeyFile }, /* alias */ | |
228 | { "pidfile", sPidFile }, | |
229 | { "serverkeybits", sServerKeyBits }, | |
230 | { "logingracetime", sLoginGraceTime }, | |
231 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
232 | { "permitrootlogin", sPermitRootLogin }, | |
233 | { "syslogfacility", sLogFacility }, | |
234 | { "loglevel", sLogLevel }, | |
235 | { "rhostsauthentication", sRhostsAuthentication }, | |
236 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, | |
237 | { "rsaauthentication", sRSAAuthentication }, | |
238 | { "pubkeyauthentication", sPubkeyAuthentication }, | |
239 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
240 | #ifdef KRB4 | |
241 | { "kerberosauthentication", sKerberosAuthentication }, | |
242 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
243 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
244 | #endif | |
245 | #ifdef AFS | |
246 | { "kerberostgtpassing", sKerberosTgtPassing }, | |
247 | { "afstokenpassing", sAFSTokenPassing }, | |
248 | #endif | |
249 | { "passwordauthentication", sPasswordAuthentication }, | |
250 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, | |
251 | { "challengeresponseauthentication", sChallengeResponseAuthentication }, | |
252 | { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ | |
253 | { "checkmail", sCheckMail }, | |
254 | { "listenaddress", sListenAddress }, | |
255 | { "printmotd", sPrintMotd }, | |
256 | { "ignorerhosts", sIgnoreRhosts }, | |
257 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
258 | { "x11forwarding", sX11Forwarding }, | |
259 | { "x11displayoffset", sX11DisplayOffset }, | |
260 | { "xauthlocation", sXAuthLocation }, | |
261 | { "strictmodes", sStrictModes }, | |
262 | { "permitemptypasswords", sEmptyPasswd }, | |
263 | { "uselogin", sUseLogin }, | |
264 | { "keepalive", sKeepAlives }, | |
265 | { "allowtcpforwarding", sAllowTcpForwarding }, | |
266 | { "allowusers", sAllowUsers }, | |
267 | { "denyusers", sDenyUsers }, | |
268 | { "allowgroups", sAllowGroups }, | |
269 | { "denygroups", sDenyGroups }, | |
270 | { "ciphers", sCiphers }, | |
271 | { "macs", sMacs }, | |
272 | { "protocol", sProtocol }, | |
273 | { "gatewayports", sGatewayPorts }, | |
274 | { "subsystem", sSubsystem }, | |
275 | { "maxstartups", sMaxStartups }, | |
276 | { "banner", sBanner }, | |
277 | { "reversemappingcheck", sReverseMappingCheck }, | |
278 | { NULL, 0 } | |
279 | }; | |
280 | ||
281 | /* | |
282 | * Returns the number of the token pointed to by cp of length len. Never | |
283 | * returns if the token is not known. | |
284 | */ | |
285 | ||
286 | static ServerOpCodes | |
287 | parse_token(const char *cp, const char *filename, | |
288 | int linenum) | |
289 | { | |
290 | u_int i; | |
291 | ||
292 | for (i = 0; keywords[i].name; i++) | |
293 | if (strcasecmp(cp, keywords[i].name) == 0) | |
294 | return keywords[i].opcode; | |
295 | ||
296 | fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", | |
297 | filename, linenum, cp); | |
298 | return sBadOption; | |
299 | } | |
300 | ||
301 | /* | |
302 | * add listen address | |
303 | */ | |
304 | void | |
305 | add_listen_addr(ServerOptions *options, char *addr) | |
306 | { | |
307 | struct addrinfo hints, *ai, *aitop; | |
308 | char strport[NI_MAXSERV]; | |
309 | int gaierr; | |
310 | int i; | |
311 | ||
312 | if (options->num_ports == 0) | |
313 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
314 | for (i = 0; i < options->num_ports; i++) { | |
315 | memset(&hints, 0, sizeof(hints)); | |
316 | hints.ai_family = IPv4or6; | |
317 | hints.ai_socktype = SOCK_STREAM; | |
318 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
319 | snprintf(strport, sizeof strport, "%d", options->ports[i]); | |
320 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) | |
321 | fatal("bad addr or host: %s (%s)", | |
322 | addr ? addr : "<NULL>", | |
323 | gai_strerror(gaierr)); | |
324 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
325 | ; | |
326 | ai->ai_next = options->listen_addrs; | |
327 | options->listen_addrs = aitop; | |
328 | } | |
329 | } | |
330 | ||
331 | /* Reads the server configuration file. */ | |
332 | ||
333 | void | |
334 | read_server_config(ServerOptions *options, const char *filename) | |
335 | { | |
336 | FILE *f; | |
337 | char line[1024]; | |
338 | char *cp, **charptr, *arg; | |
339 | int linenum, *intptr, value; | |
340 | int bad_options = 0; | |
341 | ServerOpCodes opcode; | |
342 | int i; | |
343 | ||
344 | f = fopen(filename, "r"); | |
345 | if (!f) { | |
346 | perror(filename); | |
347 | exit(1); | |
348 | } | |
349 | linenum = 0; | |
350 | while (fgets(line, sizeof(line), f)) { | |
351 | linenum++; | |
352 | cp = line; | |
353 | arg = strdelim(&cp); | |
354 | /* Ignore leading whitespace */ | |
355 | if (*arg == '\0') | |
356 | arg = strdelim(&cp); | |
357 | if (!arg || !*arg || *arg == '#') | |
358 | continue; | |
359 | intptr = NULL; | |
360 | charptr = NULL; | |
361 | opcode = parse_token(arg, filename, linenum); | |
362 | switch (opcode) { | |
363 | case sBadOption: | |
364 | bad_options++; | |
365 | continue; | |
366 | case sPort: | |
367 | /* ignore ports from configfile if cmdline specifies ports */ | |
368 | if (options->ports_from_cmdline) | |
369 | continue; | |
370 | if (options->listen_addrs != NULL) | |
371 | fatal("%s line %d: ports must be specified before " | |
372 | "ListenAdress.\n", filename, linenum); | |
373 | if (options->num_ports >= MAX_PORTS) | |
374 | fatal("%s line %d: too many ports.", | |
375 | filename, linenum); | |
376 | arg = strdelim(&cp); | |
377 | if (!arg || *arg == '\0') | |
378 | fatal("%s line %d: missing port number.", | |
379 | filename, linenum); | |
380 | options->ports[options->num_ports++] = atoi(arg); | |
381 | break; | |
382 | ||
383 | case sServerKeyBits: | |
384 | intptr = &options->server_key_bits; | |
385 | parse_int: | |
386 | arg = strdelim(&cp); | |
387 | if (!arg || *arg == '\0') { | |
388 | fprintf(stderr, "%s line %d: missing integer value.\n", | |
389 | filename, linenum); | |
390 | exit(1); | |
391 | } | |
392 | value = atoi(arg); | |
393 | if (*intptr == -1) | |
394 | *intptr = value; | |
395 | break; | |
396 | ||
397 | case sLoginGraceTime: | |
398 | intptr = &options->login_grace_time; | |
399 | goto parse_int; | |
400 | ||
401 | case sKeyRegenerationTime: | |
402 | intptr = &options->key_regeneration_time; | |
403 | goto parse_int; | |
404 | ||
405 | case sListenAddress: | |
406 | arg = strdelim(&cp); | |
407 | if (!arg || *arg == '\0') | |
408 | fatal("%s line %d: missing inet addr.", | |
409 | filename, linenum); | |
410 | add_listen_addr(options, arg); | |
411 | break; | |
412 | ||
413 | case sHostKeyFile: | |
414 | intptr = &options->num_host_key_files; | |
415 | if (*intptr >= MAX_HOSTKEYS) { | |
416 | fprintf(stderr, | |
417 | "%s line %d: too many host keys specified (max %d).\n", | |
418 | filename, linenum, MAX_HOSTKEYS); | |
419 | exit(1); | |
420 | } | |
421 | charptr = &options->host_key_files[*intptr]; | |
422 | parse_filename: | |
423 | arg = strdelim(&cp); | |
424 | if (!arg || *arg == '\0') { | |
425 | fprintf(stderr, "%s line %d: missing file name.\n", | |
426 | filename, linenum); | |
427 | exit(1); | |
428 | } | |
429 | if (*charptr == NULL) { | |
430 | *charptr = tilde_expand_filename(arg, getuid()); | |
431 | /* increase optional counter */ | |
432 | if (intptr != NULL) | |
433 | *intptr = *intptr + 1; | |
434 | } | |
435 | break; | |
436 | ||
437 | case sPidFile: | |
438 | charptr = &options->pid_file; | |
439 | goto parse_filename; | |
440 | ||
441 | case sPermitRootLogin: | |
442 | intptr = &options->permit_root_login; | |
443 | arg = strdelim(&cp); | |
444 | if (!arg || *arg == '\0') { | |
445 | fprintf(stderr, "%s line %d: missing yes/" | |
446 | "without-password/forced-commands-only/no " | |
447 | "argument.\n", filename, linenum); | |
448 | exit(1); | |
449 | } | |
450 | if (strcmp(arg, "without-password") == 0) | |
451 | value = PERMIT_NO_PASSWD; | |
452 | else if (strcmp(arg, "forced-commands-only") == 0) | |
453 | value = PERMIT_FORCED_ONLY; | |
454 | else if (strcmp(arg, "yes") == 0) | |
455 | value = PERMIT_YES; | |
456 | else if (strcmp(arg, "no") == 0) | |
457 | value = PERMIT_NO; | |
458 | else { | |
459 | fprintf(stderr, "%s line %d: Bad yes/" | |
460 | "without-password/forced-commands-only/no " | |
461 | "argument: %s\n", filename, linenum, arg); | |
462 | exit(1); | |
463 | } | |
464 | if (*intptr == -1) | |
465 | *intptr = value; | |
466 | break; | |
467 | ||
468 | case sIgnoreRhosts: | |
469 | intptr = &options->ignore_rhosts; | |
470 | parse_flag: | |
471 | arg = strdelim(&cp); | |
472 | if (!arg || *arg == '\0') { | |
473 | fprintf(stderr, "%s line %d: missing yes/no argument.\n", | |
474 | filename, linenum); | |
475 | exit(1); | |
476 | } | |
477 | if (strcmp(arg, "yes") == 0) | |
478 | value = 1; | |
479 | else if (strcmp(arg, "no") == 0) | |
480 | value = 0; | |
481 | else { | |
482 | fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n", | |
483 | filename, linenum, arg); | |
484 | exit(1); | |
485 | } | |
486 | if (*intptr == -1) | |
487 | *intptr = value; | |
488 | break; | |
489 | ||
490 | case sIgnoreUserKnownHosts: | |
491 | intptr = &options->ignore_user_known_hosts; | |
492 | goto parse_flag; | |
493 | ||
494 | case sRhostsAuthentication: | |
495 | intptr = &options->rhosts_authentication; | |
496 | goto parse_flag; | |
497 | ||
498 | case sRhostsRSAAuthentication: | |
499 | intptr = &options->rhosts_rsa_authentication; | |
500 | goto parse_flag; | |
501 | ||
502 | case sRSAAuthentication: | |
503 | intptr = &options->rsa_authentication; | |
504 | goto parse_flag; | |
505 | ||
506 | case sPubkeyAuthentication: | |
507 | intptr = &options->pubkey_authentication; | |
508 | goto parse_flag; | |
509 | ||
510 | #ifdef KRB4 | |
511 | case sKerberosAuthentication: | |
512 | intptr = &options->kerberos_authentication; | |
513 | goto parse_flag; | |
514 | ||
515 | case sKerberosOrLocalPasswd: | |
516 | intptr = &options->kerberos_or_local_passwd; | |
517 | goto parse_flag; | |
518 | ||
519 | case sKerberosTicketCleanup: | |
520 | intptr = &options->kerberos_ticket_cleanup; | |
521 | goto parse_flag; | |
522 | #endif | |
523 | ||
524 | #ifdef AFS | |
525 | case sKerberosTgtPassing: | |
526 | intptr = &options->kerberos_tgt_passing; | |
527 | goto parse_flag; | |
528 | ||
529 | case sAFSTokenPassing: | |
530 | intptr = &options->afs_token_passing; | |
531 | goto parse_flag; | |
532 | #endif | |
533 | ||
534 | case sPasswordAuthentication: | |
535 | intptr = &options->password_authentication; | |
536 | goto parse_flag; | |
537 | ||
538 | case sKbdInteractiveAuthentication: | |
539 | intptr = &options->kbd_interactive_authentication; | |
540 | goto parse_flag; | |
541 | ||
542 | case sCheckMail: | |
543 | intptr = &options->check_mail; | |
544 | goto parse_flag; | |
545 | ||
546 | case sChallengeResponseAuthentication: | |
547 | intptr = &options->challenge_reponse_authentication; | |
548 | goto parse_flag; | |
549 | ||
550 | case sPrintMotd: | |
551 | intptr = &options->print_motd; | |
552 | goto parse_flag; | |
553 | ||
554 | case sX11Forwarding: | |
555 | intptr = &options->x11_forwarding; | |
556 | goto parse_flag; | |
557 | ||
558 | case sX11DisplayOffset: | |
559 | intptr = &options->x11_display_offset; | |
560 | goto parse_int; | |
561 | ||
562 | case sXAuthLocation: | |
563 | charptr = &options->xauth_location; | |
564 | goto parse_filename; | |
565 | ||
566 | case sStrictModes: | |
567 | intptr = &options->strict_modes; | |
568 | goto parse_flag; | |
569 | ||
570 | case sKeepAlives: | |
571 | intptr = &options->keepalives; | |
572 | goto parse_flag; | |
573 | ||
574 | case sEmptyPasswd: | |
575 | intptr = &options->permit_empty_passwd; | |
576 | goto parse_flag; | |
577 | ||
578 | case sUseLogin: | |
579 | intptr = &options->use_login; | |
580 | goto parse_flag; | |
581 | ||
582 | case sGatewayPorts: | |
583 | intptr = &options->gateway_ports; | |
584 | goto parse_flag; | |
585 | ||
586 | case sReverseMappingCheck: | |
587 | intptr = &options->reverse_mapping_check; | |
588 | goto parse_flag; | |
589 | ||
590 | case sLogFacility: | |
591 | intptr = (int *) &options->log_facility; | |
592 | arg = strdelim(&cp); | |
593 | value = log_facility_number(arg); | |
594 | if (value == (SyslogFacility) - 1) | |
595 | fatal("%.200s line %d: unsupported log facility '%s'", | |
596 | filename, linenum, arg ? arg : "<NONE>"); | |
597 | if (*intptr == -1) | |
598 | *intptr = (SyslogFacility) value; | |
599 | break; | |
600 | ||
601 | case sLogLevel: | |
602 | intptr = (int *) &options->log_level; | |
603 | arg = strdelim(&cp); | |
604 | value = log_level_number(arg); | |
605 | if (value == (LogLevel) - 1) | |
606 | fatal("%.200s line %d: unsupported log level '%s'", | |
607 | filename, linenum, arg ? arg : "<NONE>"); | |
608 | if (*intptr == -1) | |
609 | *intptr = (LogLevel) value; | |
610 | break; | |
611 | ||
612 | case sAllowTcpForwarding: | |
613 | intptr = &options->allow_tcp_forwarding; | |
614 | goto parse_flag; | |
615 | ||
616 | case sAllowUsers: | |
617 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
618 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
619 | fatal("%s line %d: too many allow users.", | |
620 | filename, linenum); | |
621 | options->allow_users[options->num_allow_users++] = xstrdup(arg); | |
622 | } | |
623 | break; | |
624 | ||
625 | case sDenyUsers: | |
626 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
627 | if (options->num_deny_users >= MAX_DENY_USERS) | |
628 | fatal( "%s line %d: too many deny users.", | |
629 | filename, linenum); | |
630 | options->deny_users[options->num_deny_users++] = xstrdup(arg); | |
631 | } | |
632 | break; | |
633 | ||
634 | case sAllowGroups: | |
635 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
636 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
637 | fatal("%s line %d: too many allow groups.", | |
638 | filename, linenum); | |
639 | options->allow_groups[options->num_allow_groups++] = xstrdup(arg); | |
640 | } | |
641 | break; | |
642 | ||
643 | case sDenyGroups: | |
644 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
645 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
646 | fatal("%s line %d: too many deny groups.", | |
647 | filename, linenum); | |
648 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
649 | } | |
650 | break; | |
651 | ||
652 | case sCiphers: | |
653 | arg = strdelim(&cp); | |
654 | if (!arg || *arg == '\0') | |
655 | fatal("%s line %d: Missing argument.", filename, linenum); | |
656 | if (!ciphers_valid(arg)) | |
657 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
658 | filename, linenum, arg ? arg : "<NONE>"); | |
659 | if (options->ciphers == NULL) | |
660 | options->ciphers = xstrdup(arg); | |
661 | break; | |
662 | ||
663 | case sMacs: | |
664 | arg = strdelim(&cp); | |
665 | if (!arg || *arg == '\0') | |
666 | fatal("%s line %d: Missing argument.", filename, linenum); | |
667 | if (!mac_valid(arg)) | |
668 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
669 | filename, linenum, arg ? arg : "<NONE>"); | |
670 | if (options->macs == NULL) | |
671 | options->macs = xstrdup(arg); | |
672 | break; | |
673 | ||
674 | case sProtocol: | |
675 | intptr = &options->protocol; | |
676 | arg = strdelim(&cp); | |
677 | if (!arg || *arg == '\0') | |
678 | fatal("%s line %d: Missing argument.", filename, linenum); | |
679 | value = proto_spec(arg); | |
680 | if (value == SSH_PROTO_UNKNOWN) | |
681 | fatal("%s line %d: Bad protocol spec '%s'.", | |
682 | filename, linenum, arg ? arg : "<NONE>"); | |
683 | if (*intptr == SSH_PROTO_UNKNOWN) | |
684 | *intptr = value; | |
685 | break; | |
686 | ||
687 | case sSubsystem: | |
688 | if(options->num_subsystems >= MAX_SUBSYSTEMS) { | |
689 | fatal("%s line %d: too many subsystems defined.", | |
690 | filename, linenum); | |
691 | } | |
692 | arg = strdelim(&cp); | |
693 | if (!arg || *arg == '\0') | |
694 | fatal("%s line %d: Missing subsystem name.", | |
695 | filename, linenum); | |
696 | for (i = 0; i < options->num_subsystems; i++) | |
697 | if(strcmp(arg, options->subsystem_name[i]) == 0) | |
698 | fatal("%s line %d: Subsystem '%s' already defined.", | |
699 | filename, linenum, arg); | |
700 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
701 | arg = strdelim(&cp); | |
702 | if (!arg || *arg == '\0') | |
703 | fatal("%s line %d: Missing subsystem command.", | |
704 | filename, linenum); | |
705 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
706 | options->num_subsystems++; | |
707 | break; | |
708 | ||
709 | case sMaxStartups: | |
710 | arg = strdelim(&cp); | |
711 | if (!arg || *arg == '\0') | |
712 | fatal("%s line %d: Missing MaxStartups spec.", | |
713 | filename, linenum); | |
714 | if (sscanf(arg, "%d:%d:%d", | |
715 | &options->max_startups_begin, | |
716 | &options->max_startups_rate, | |
717 | &options->max_startups) == 3) { | |
718 | if (options->max_startups_begin > | |
719 | options->max_startups || | |
720 | options->max_startups_rate > 100 || | |
721 | options->max_startups_rate < 1) | |
722 | fatal("%s line %d: Illegal MaxStartups spec.", | |
723 | filename, linenum); | |
724 | break; | |
725 | } | |
726 | intptr = &options->max_startups; | |
727 | goto parse_int; | |
728 | ||
729 | case sBanner: | |
730 | charptr = &options->banner; | |
731 | goto parse_filename; | |
732 | ||
733 | default: | |
734 | fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n", | |
735 | filename, linenum, arg, opcode); | |
736 | exit(1); | |
737 | } | |
738 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
739 | fprintf(stderr, | |
740 | "%s line %d: garbage at end of line; \"%.200s\".\n", | |
741 | filename, linenum, arg); | |
742 | exit(1); | |
743 | } | |
744 | } | |
745 | fclose(f); | |
746 | if (bad_options > 0) { | |
747 | fprintf(stderr, "%s: terminating, %d bad configuration options\n", | |
748 | filename, bad_options); | |
749 | exit(1); | |
750 | } | |
751 | } |