]>
Commit | Line | Data |
---|---|---|
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 1.54 2000/11/12 19:50:38 markus Exp $"); | |
14 | ||
15 | #include "ssh.h" | |
16 | #include "servconf.h" | |
17 | #include "xmalloc.h" | |
18 | #include "compat.h" | |
19 | ||
20 | /* add listen address */ | |
21 | void add_listen_addr(ServerOptions *options, char *addr); | |
22 | ||
23 | /* Initializes the server options to their default values. */ | |
24 | ||
25 | void | |
26 | initialize_server_options(ServerOptions *options) | |
27 | { | |
28 | memset(options, 0, sizeof(*options)); | |
29 | options->num_ports = 0; | |
30 | options->ports_from_cmdline = 0; | |
31 | options->listen_addrs = NULL; | |
32 | options->num_host_key_files = 0; | |
33 | options->pid_file = NULL; | |
34 | options->server_key_bits = -1; | |
35 | options->login_grace_time = -1; | |
36 | options->key_regeneration_time = -1; | |
37 | options->permit_root_login = -1; | |
38 | options->ignore_rhosts = -1; | |
39 | options->ignore_user_known_hosts = -1; | |
40 | options->print_motd = -1; | |
41 | options->check_mail = -1; | |
42 | options->x11_forwarding = -1; | |
43 | options->x11_display_offset = -1; | |
44 | options->xauth_location = NULL; | |
45 | options->strict_modes = -1; | |
46 | options->keepalives = -1; | |
47 | options->log_facility = (SyslogFacility) - 1; | |
48 | options->log_level = (LogLevel) - 1; | |
49 | options->rhosts_authentication = -1; | |
50 | options->rhosts_rsa_authentication = -1; | |
51 | options->rsa_authentication = -1; | |
52 | options->pubkey_authentication = -1; | |
53 | #ifdef KRB4 | |
54 | options->kerberos_authentication = -1; | |
55 | options->kerberos_or_local_passwd = -1; | |
56 | options->kerberos_ticket_cleanup = -1; | |
57 | #endif | |
58 | #ifdef AFS | |
59 | options->kerberos_tgt_passing = -1; | |
60 | options->afs_token_passing = -1; | |
61 | #endif | |
62 | options->password_authentication = -1; | |
63 | options->kbd_interactive_authentication = -1; | |
64 | #ifdef SKEY | |
65 | options->skey_authentication = -1; | |
66 | #endif | |
67 | options->permit_empty_passwd = -1; | |
68 | options->use_login = -1; | |
69 | options->allow_tcp_forwarding = -1; | |
70 | options->num_allow_users = 0; | |
71 | options->num_deny_users = 0; | |
72 | options->num_allow_groups = 0; | |
73 | options->num_deny_groups = 0; | |
74 | options->ciphers = NULL; | |
75 | options->protocol = SSH_PROTO_UNKNOWN; | |
76 | options->gateway_ports = -1; | |
77 | options->num_subsystems = 0; | |
78 | options->max_startups_begin = -1; | |
79 | options->max_startups_rate = -1; | |
80 | options->max_startups = -1; | |
81 | } | |
82 | ||
83 | void | |
84 | fill_default_server_options(ServerOptions *options) | |
85 | { | |
86 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
87 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
88 | if (options->num_host_key_files == 0) { | |
89 | /* fill default hostkeys for protocols */ | |
90 | if (options->protocol & SSH_PROTO_1) | |
91 | options->host_key_files[options->num_host_key_files++] = HOST_KEY_FILE; | |
92 | if (options->protocol & SSH_PROTO_2) | |
93 | options->host_key_files[options->num_host_key_files++] = HOST_DSA_KEY_FILE; | |
94 | } | |
95 | if (options->num_ports == 0) | |
96 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
97 | if (options->listen_addrs == NULL) | |
98 | add_listen_addr(options, NULL); | |
99 | if (options->pid_file == NULL) | |
100 | options->pid_file = SSH_DAEMON_PID_FILE; | |
101 | if (options->server_key_bits == -1) | |
102 | options->server_key_bits = 768; | |
103 | if (options->login_grace_time == -1) | |
104 | options->login_grace_time = 600; | |
105 | if (options->key_regeneration_time == -1) | |
106 | options->key_regeneration_time = 3600; | |
107 | if (options->permit_root_login == -1) | |
108 | options->permit_root_login = 1; /* yes */ | |
109 | if (options->ignore_rhosts == -1) | |
110 | options->ignore_rhosts = 1; | |
111 | if (options->ignore_user_known_hosts == -1) | |
112 | options->ignore_user_known_hosts = 0; | |
113 | if (options->check_mail == -1) | |
114 | options->check_mail = 0; | |
115 | if (options->print_motd == -1) | |
116 | options->print_motd = 1; | |
117 | if (options->x11_forwarding == -1) | |
118 | options->x11_forwarding = 0; | |
119 | if (options->x11_display_offset == -1) | |
120 | options->x11_display_offset = 10; | |
121 | #ifdef XAUTH_PATH | |
122 | if (options->xauth_location == NULL) | |
123 | options->xauth_location = XAUTH_PATH; | |
124 | #endif /* XAUTH_PATH */ | |
125 | if (options->strict_modes == -1) | |
126 | options->strict_modes = 1; | |
127 | if (options->keepalives == -1) | |
128 | options->keepalives = 1; | |
129 | if (options->log_facility == (SyslogFacility) (-1)) | |
130 | options->log_facility = SYSLOG_FACILITY_AUTH; | |
131 | if (options->log_level == (LogLevel) (-1)) | |
132 | options->log_level = SYSLOG_LEVEL_INFO; | |
133 | if (options->rhosts_authentication == -1) | |
134 | options->rhosts_authentication = 0; | |
135 | if (options->rhosts_rsa_authentication == -1) | |
136 | options->rhosts_rsa_authentication = 0; | |
137 | if (options->rsa_authentication == -1) | |
138 | options->rsa_authentication = 1; | |
139 | if (options->pubkey_authentication == -1) | |
140 | options->pubkey_authentication = 1; | |
141 | #ifdef KRB4 | |
142 | if (options->kerberos_authentication == -1) | |
143 | options->kerberos_authentication = (access(KEYFILE, R_OK) == 0); | |
144 | if (options->kerberos_or_local_passwd == -1) | |
145 | options->kerberos_or_local_passwd = 1; | |
146 | if (options->kerberos_ticket_cleanup == -1) | |
147 | options->kerberos_ticket_cleanup = 1; | |
148 | #endif /* KRB4 */ | |
149 | #ifdef AFS | |
150 | if (options->kerberos_tgt_passing == -1) | |
151 | options->kerberos_tgt_passing = 0; | |
152 | if (options->afs_token_passing == -1) | |
153 | options->afs_token_passing = k_hasafs(); | |
154 | #endif /* AFS */ | |
155 | if (options->password_authentication == -1) | |
156 | options->password_authentication = 1; | |
157 | if (options->kbd_interactive_authentication == -1) | |
158 | options->kbd_interactive_authentication = 0; | |
159 | #ifdef SKEY | |
160 | if (options->skey_authentication == -1) | |
161 | options->skey_authentication = 1; | |
162 | #endif | |
163 | if (options->permit_empty_passwd == -1) | |
164 | options->permit_empty_passwd = 0; | |
165 | if (options->use_login == -1) | |
166 | options->use_login = 0; | |
167 | if (options->allow_tcp_forwarding == -1) | |
168 | options->allow_tcp_forwarding = 1; | |
169 | if (options->gateway_ports == -1) | |
170 | options->gateway_ports = 0; | |
171 | if (options->max_startups == -1) | |
172 | options->max_startups = 10; | |
173 | if (options->max_startups_rate == -1) | |
174 | options->max_startups_rate = 100; /* 100% */ | |
175 | if (options->max_startups_begin == -1) | |
176 | options->max_startups_begin = options->max_startups; | |
177 | } | |
178 | ||
179 | /* Keyword tokens. */ | |
180 | typedef enum { | |
181 | sBadOption, /* == unknown option */ | |
182 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
183 | sPermitRootLogin, sLogFacility, sLogLevel, | |
184 | sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, | |
185 | #ifdef KRB4 | |
186 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, | |
187 | #endif | |
188 | #ifdef AFS | |
189 | sKerberosTgtPassing, sAFSTokenPassing, | |
190 | #endif | |
191 | #ifdef SKEY | |
192 | sSkeyAuthentication, | |
193 | #endif | |
194 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, | |
195 | sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, | |
196 | sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail, | |
197 | sUseLogin, sAllowTcpForwarding, | |
198 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, | |
199 | sIgnoreUserKnownHosts, sCiphers, sProtocol, sPidFile, | |
200 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, | |
201 | } ServerOpCodes; | |
202 | ||
203 | /* Textual representation of the tokens. */ | |
204 | static struct { | |
205 | const char *name; | |
206 | ServerOpCodes opcode; | |
207 | } keywords[] = { | |
208 | { "port", sPort }, | |
209 | { "hostkey", sHostKeyFile }, | |
210 | { "hostdsakey", sHostKeyFile }, /* alias */ | |
211 | { "pidfile", sPidFile }, | |
212 | { "serverkeybits", sServerKeyBits }, | |
213 | { "logingracetime", sLoginGraceTime }, | |
214 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
215 | { "permitrootlogin", sPermitRootLogin }, | |
216 | { "syslogfacility", sLogFacility }, | |
217 | { "loglevel", sLogLevel }, | |
218 | { "rhostsauthentication", sRhostsAuthentication }, | |
219 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, | |
220 | { "rsaauthentication", sRSAAuthentication }, | |
221 | { "pubkeyauthentication", sPubkeyAuthentication }, | |
222 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
223 | #ifdef KRB4 | |
224 | { "kerberosauthentication", sKerberosAuthentication }, | |
225 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
226 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
227 | #endif | |
228 | #ifdef AFS | |
229 | { "kerberostgtpassing", sKerberosTgtPassing }, | |
230 | { "afstokenpassing", sAFSTokenPassing }, | |
231 | #endif | |
232 | { "passwordauthentication", sPasswordAuthentication }, | |
233 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, | |
234 | #ifdef SKEY | |
235 | { "skeyauthentication", sSkeyAuthentication }, | |
236 | #endif | |
237 | { "checkmail", sCheckMail }, | |
238 | { "listenaddress", sListenAddress }, | |
239 | { "printmotd", sPrintMotd }, | |
240 | { "ignorerhosts", sIgnoreRhosts }, | |
241 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
242 | { "x11forwarding", sX11Forwarding }, | |
243 | { "x11displayoffset", sX11DisplayOffset }, | |
244 | { "xauthlocation", sXAuthLocation }, | |
245 | { "strictmodes", sStrictModes }, | |
246 | { "permitemptypasswords", sEmptyPasswd }, | |
247 | { "uselogin", sUseLogin }, | |
248 | { "randomseed", sRandomSeedFile }, | |
249 | { "keepalive", sKeepAlives }, | |
250 | { "allowtcpforwarding", sAllowTcpForwarding }, | |
251 | { "allowusers", sAllowUsers }, | |
252 | { "denyusers", sDenyUsers }, | |
253 | { "allowgroups", sAllowGroups }, | |
254 | { "denygroups", sDenyGroups }, | |
255 | { "ciphers", sCiphers }, | |
256 | { "protocol", sProtocol }, | |
257 | { "gatewayports", sGatewayPorts }, | |
258 | { "subsystem", sSubsystem }, | |
259 | { "maxstartups", sMaxStartups }, | |
260 | { NULL, 0 } | |
261 | }; | |
262 | ||
263 | /* | |
264 | * Returns the number of the token pointed to by cp of length len. Never | |
265 | * returns if the token is not known. | |
266 | */ | |
267 | ||
268 | static ServerOpCodes | |
269 | parse_token(const char *cp, const char *filename, | |
270 | int linenum) | |
271 | { | |
272 | unsigned int i; | |
273 | ||
274 | for (i = 0; keywords[i].name; i++) | |
275 | if (strcasecmp(cp, keywords[i].name) == 0) | |
276 | return keywords[i].opcode; | |
277 | ||
278 | fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", | |
279 | filename, linenum, cp); | |
280 | return sBadOption; | |
281 | } | |
282 | ||
283 | /* | |
284 | * add listen address | |
285 | */ | |
286 | void | |
287 | add_listen_addr(ServerOptions *options, char *addr) | |
288 | { | |
289 | extern int IPv4or6; | |
290 | struct addrinfo hints, *ai, *aitop; | |
291 | char strport[NI_MAXSERV]; | |
292 | int gaierr; | |
293 | int i; | |
294 | ||
295 | if (options->num_ports == 0) | |
296 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
297 | for (i = 0; i < options->num_ports; i++) { | |
298 | memset(&hints, 0, sizeof(hints)); | |
299 | hints.ai_family = IPv4or6; | |
300 | hints.ai_socktype = SOCK_STREAM; | |
301 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
302 | snprintf(strport, sizeof strport, "%d", options->ports[i]); | |
303 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) | |
304 | fatal("bad addr or host: %s (%s)\n", | |
305 | addr ? addr : "<NULL>", | |
306 | gai_strerror(gaierr)); | |
307 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
308 | ; | |
309 | ai->ai_next = options->listen_addrs; | |
310 | options->listen_addrs = aitop; | |
311 | } | |
312 | } | |
313 | ||
314 | /* Reads the server configuration file. */ | |
315 | ||
316 | void | |
317 | read_server_config(ServerOptions *options, const char *filename) | |
318 | { | |
319 | FILE *f; | |
320 | char line[1024]; | |
321 | char *cp, **charptr, *arg; | |
322 | int linenum, *intptr, value; | |
323 | int bad_options = 0; | |
324 | ServerOpCodes opcode; | |
325 | int i; | |
326 | ||
327 | f = fopen(filename, "r"); | |
328 | if (!f) { | |
329 | perror(filename); | |
330 | exit(1); | |
331 | } | |
332 | linenum = 0; | |
333 | while (fgets(line, sizeof(line), f)) { | |
334 | linenum++; | |
335 | cp = line; | |
336 | arg = strdelim(&cp); | |
337 | /* Ignore leading whitespace */ | |
338 | if (*arg == '\0') | |
339 | arg = strdelim(&cp); | |
340 | if (!*arg || *arg == '#') | |
341 | continue; | |
342 | intptr = NULL; | |
343 | charptr = NULL; | |
344 | opcode = parse_token(arg, filename, linenum); | |
345 | switch (opcode) { | |
346 | case sBadOption: | |
347 | bad_options++; | |
348 | continue; | |
349 | case sPort: | |
350 | /* ignore ports from configfile if cmdline specifies ports */ | |
351 | if (options->ports_from_cmdline) | |
352 | continue; | |
353 | if (options->listen_addrs != NULL) | |
354 | fatal("%s line %d: ports must be specified before " | |
355 | "ListenAdress.\n", filename, linenum); | |
356 | if (options->num_ports >= MAX_PORTS) | |
357 | fatal("%s line %d: too many ports.\n", | |
358 | filename, linenum); | |
359 | arg = strdelim(&cp); | |
360 | if (!arg || *arg == '\0') | |
361 | fatal("%s line %d: missing port number.\n", | |
362 | filename, linenum); | |
363 | options->ports[options->num_ports++] = atoi(arg); | |
364 | break; | |
365 | ||
366 | case sServerKeyBits: | |
367 | intptr = &options->server_key_bits; | |
368 | parse_int: | |
369 | arg = strdelim(&cp); | |
370 | if (!arg || *arg == '\0') { | |
371 | fprintf(stderr, "%s line %d: missing integer value.\n", | |
372 | filename, linenum); | |
373 | exit(1); | |
374 | } | |
375 | value = atoi(arg); | |
376 | if (*intptr == -1) | |
377 | *intptr = value; | |
378 | break; | |
379 | ||
380 | case sLoginGraceTime: | |
381 | intptr = &options->login_grace_time; | |
382 | goto parse_int; | |
383 | ||
384 | case sKeyRegenerationTime: | |
385 | intptr = &options->key_regeneration_time; | |
386 | goto parse_int; | |
387 | ||
388 | case sListenAddress: | |
389 | arg = strdelim(&cp); | |
390 | if (!arg || *arg == '\0') | |
391 | fatal("%s line %d: missing inet addr.\n", | |
392 | filename, linenum); | |
393 | add_listen_addr(options, arg); | |
394 | break; | |
395 | ||
396 | case sHostKeyFile: | |
397 | intptr = &options->num_host_key_files; | |
398 | if (*intptr >= MAX_HOSTKEYS) { | |
399 | fprintf(stderr, "%s line %d: to many host keys specified (max %d).\n", | |
400 | filename, linenum, MAX_HOSTKEYS); | |
401 | exit(1); | |
402 | } | |
403 | charptr = &options->host_key_files[*intptr]; | |
404 | parse_filename: | |
405 | arg = strdelim(&cp); | |
406 | if (!arg || *arg == '\0') { | |
407 | fprintf(stderr, "%s line %d: missing file name.\n", | |
408 | filename, linenum); | |
409 | exit(1); | |
410 | } | |
411 | if (*charptr == NULL) { | |
412 | *charptr = tilde_expand_filename(arg, getuid()); | |
413 | /* increase optional counter */ | |
414 | if (intptr != NULL) | |
415 | *intptr = *intptr + 1; | |
416 | } | |
417 | break; | |
418 | ||
419 | case sPidFile: | |
420 | charptr = &options->pid_file; | |
421 | goto parse_filename; | |
422 | ||
423 | case sRandomSeedFile: | |
424 | fprintf(stderr, "%s line %d: \"randomseed\" option is obsolete.\n", | |
425 | filename, linenum); | |
426 | arg = strdelim(&cp); | |
427 | break; | |
428 | ||
429 | case sPermitRootLogin: | |
430 | intptr = &options->permit_root_login; | |
431 | arg = strdelim(&cp); | |
432 | if (!arg || *arg == '\0') { | |
433 | fprintf(stderr, "%s line %d: missing yes/without-password/no argument.\n", | |
434 | filename, linenum); | |
435 | exit(1); | |
436 | } | |
437 | if (strcmp(arg, "without-password") == 0) | |
438 | value = 2; | |
439 | else if (strcmp(arg, "yes") == 0) | |
440 | value = 1; | |
441 | else if (strcmp(arg, "no") == 0) | |
442 | value = 0; | |
443 | else { | |
444 | fprintf(stderr, "%s line %d: Bad yes/without-password/no argument: %s\n", | |
445 | filename, linenum, arg); | |
446 | exit(1); | |
447 | } | |
448 | if (*intptr == -1) | |
449 | *intptr = value; | |
450 | break; | |
451 | ||
452 | case sIgnoreRhosts: | |
453 | intptr = &options->ignore_rhosts; | |
454 | parse_flag: | |
455 | arg = strdelim(&cp); | |
456 | if (!arg || *arg == '\0') { | |
457 | fprintf(stderr, "%s line %d: missing yes/no argument.\n", | |
458 | filename, linenum); | |
459 | exit(1); | |
460 | } | |
461 | if (strcmp(arg, "yes") == 0) | |
462 | value = 1; | |
463 | else if (strcmp(arg, "no") == 0) | |
464 | value = 0; | |
465 | else { | |
466 | fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n", | |
467 | filename, linenum, arg); | |
468 | exit(1); | |
469 | } | |
470 | if (*intptr == -1) | |
471 | *intptr = value; | |
472 | break; | |
473 | ||
474 | case sIgnoreUserKnownHosts: | |
475 | intptr = &options->ignore_user_known_hosts; | |
476 | goto parse_flag; | |
477 | ||
478 | case sRhostsAuthentication: | |
479 | intptr = &options->rhosts_authentication; | |
480 | goto parse_flag; | |
481 | ||
482 | case sRhostsRSAAuthentication: | |
483 | intptr = &options->rhosts_rsa_authentication; | |
484 | goto parse_flag; | |
485 | ||
486 | case sRSAAuthentication: | |
487 | intptr = &options->rsa_authentication; | |
488 | goto parse_flag; | |
489 | ||
490 | case sPubkeyAuthentication: | |
491 | intptr = &options->pubkey_authentication; | |
492 | goto parse_flag; | |
493 | ||
494 | #ifdef KRB4 | |
495 | case sKerberosAuthentication: | |
496 | intptr = &options->kerberos_authentication; | |
497 | goto parse_flag; | |
498 | ||
499 | case sKerberosOrLocalPasswd: | |
500 | intptr = &options->kerberos_or_local_passwd; | |
501 | goto parse_flag; | |
502 | ||
503 | case sKerberosTicketCleanup: | |
504 | intptr = &options->kerberos_ticket_cleanup; | |
505 | goto parse_flag; | |
506 | #endif | |
507 | ||
508 | #ifdef AFS | |
509 | case sKerberosTgtPassing: | |
510 | intptr = &options->kerberos_tgt_passing; | |
511 | goto parse_flag; | |
512 | ||
513 | case sAFSTokenPassing: | |
514 | intptr = &options->afs_token_passing; | |
515 | goto parse_flag; | |
516 | #endif | |
517 | ||
518 | case sPasswordAuthentication: | |
519 | intptr = &options->password_authentication; | |
520 | goto parse_flag; | |
521 | ||
522 | case sKbdInteractiveAuthentication: | |
523 | intptr = &options->kbd_interactive_authentication; | |
524 | goto parse_flag; | |
525 | ||
526 | case sCheckMail: | |
527 | intptr = &options->check_mail; | |
528 | goto parse_flag; | |
529 | ||
530 | #ifdef SKEY | |
531 | case sSkeyAuthentication: | |
532 | intptr = &options->skey_authentication; | |
533 | goto parse_flag; | |
534 | #endif | |
535 | ||
536 | case sPrintMotd: | |
537 | intptr = &options->print_motd; | |
538 | goto parse_flag; | |
539 | ||
540 | case sX11Forwarding: | |
541 | intptr = &options->x11_forwarding; | |
542 | goto parse_flag; | |
543 | ||
544 | case sX11DisplayOffset: | |
545 | intptr = &options->x11_display_offset; | |
546 | goto parse_int; | |
547 | ||
548 | case sXAuthLocation: | |
549 | charptr = &options->xauth_location; | |
550 | goto parse_filename; | |
551 | ||
552 | case sStrictModes: | |
553 | intptr = &options->strict_modes; | |
554 | goto parse_flag; | |
555 | ||
556 | case sKeepAlives: | |
557 | intptr = &options->keepalives; | |
558 | goto parse_flag; | |
559 | ||
560 | case sEmptyPasswd: | |
561 | intptr = &options->permit_empty_passwd; | |
562 | goto parse_flag; | |
563 | ||
564 | case sUseLogin: | |
565 | intptr = &options->use_login; | |
566 | goto parse_flag; | |
567 | ||
568 | case sGatewayPorts: | |
569 | intptr = &options->gateway_ports; | |
570 | goto parse_flag; | |
571 | ||
572 | case sLogFacility: | |
573 | intptr = (int *) &options->log_facility; | |
574 | arg = strdelim(&cp); | |
575 | value = log_facility_number(arg); | |
576 | if (value == (SyslogFacility) - 1) | |
577 | fatal("%.200s line %d: unsupported log facility '%s'\n", | |
578 | filename, linenum, arg ? arg : "<NONE>"); | |
579 | if (*intptr == -1) | |
580 | *intptr = (SyslogFacility) value; | |
581 | break; | |
582 | ||
583 | case sLogLevel: | |
584 | intptr = (int *) &options->log_level; | |
585 | arg = strdelim(&cp); | |
586 | value = log_level_number(arg); | |
587 | if (value == (LogLevel) - 1) | |
588 | fatal("%.200s line %d: unsupported log level '%s'\n", | |
589 | filename, linenum, arg ? arg : "<NONE>"); | |
590 | if (*intptr == -1) | |
591 | *intptr = (LogLevel) value; | |
592 | break; | |
593 | ||
594 | case sAllowTcpForwarding: | |
595 | intptr = &options->allow_tcp_forwarding; | |
596 | goto parse_flag; | |
597 | ||
598 | case sAllowUsers: | |
599 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
600 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
601 | fatal("%s line %d: too many allow users.\n", | |
602 | filename, linenum); | |
603 | options->allow_users[options->num_allow_users++] = xstrdup(arg); | |
604 | } | |
605 | break; | |
606 | ||
607 | case sDenyUsers: | |
608 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
609 | if (options->num_deny_users >= MAX_DENY_USERS) | |
610 | fatal( "%s line %d: too many deny users.\n", | |
611 | filename, linenum); | |
612 | options->deny_users[options->num_deny_users++] = xstrdup(arg); | |
613 | } | |
614 | break; | |
615 | ||
616 | case sAllowGroups: | |
617 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
618 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
619 | fatal("%s line %d: too many allow groups.\n", | |
620 | filename, linenum); | |
621 | options->allow_groups[options->num_allow_groups++] = xstrdup(arg); | |
622 | } | |
623 | break; | |
624 | ||
625 | case sDenyGroups: | |
626 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
627 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
628 | fatal("%s line %d: too many deny groups.\n", | |
629 | filename, linenum); | |
630 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
631 | } | |
632 | break; | |
633 | ||
634 | case sCiphers: | |
635 | arg = strdelim(&cp); | |
636 | if (!arg || *arg == '\0') | |
637 | fatal("%s line %d: Missing argument.", filename, linenum); | |
638 | if (!ciphers_valid(arg)) | |
639 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
640 | filename, linenum, arg ? arg : "<NONE>"); | |
641 | if (options->ciphers == NULL) | |
642 | options->ciphers = xstrdup(arg); | |
643 | break; | |
644 | ||
645 | case sProtocol: | |
646 | intptr = &options->protocol; | |
647 | arg = strdelim(&cp); | |
648 | if (!arg || *arg == '\0') | |
649 | fatal("%s line %d: Missing argument.", filename, linenum); | |
650 | value = proto_spec(arg); | |
651 | if (value == SSH_PROTO_UNKNOWN) | |
652 | fatal("%s line %d: Bad protocol spec '%s'.", | |
653 | filename, linenum, arg ? arg : "<NONE>"); | |
654 | if (*intptr == SSH_PROTO_UNKNOWN) | |
655 | *intptr = value; | |
656 | break; | |
657 | ||
658 | case sSubsystem: | |
659 | if(options->num_subsystems >= MAX_SUBSYSTEMS) { | |
660 | fatal("%s line %d: too many subsystems defined.", | |
661 | filename, linenum); | |
662 | } | |
663 | arg = strdelim(&cp); | |
664 | if (!arg || *arg == '\0') | |
665 | fatal("%s line %d: Missing subsystem name.", | |
666 | filename, linenum); | |
667 | for (i = 0; i < options->num_subsystems; i++) | |
668 | if(strcmp(arg, options->subsystem_name[i]) == 0) | |
669 | fatal("%s line %d: Subsystem '%s' already defined.", | |
670 | filename, linenum, arg); | |
671 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
672 | arg = strdelim(&cp); | |
673 | if (!arg || *arg == '\0') | |
674 | fatal("%s line %d: Missing subsystem command.", | |
675 | filename, linenum); | |
676 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
677 | options->num_subsystems++; | |
678 | break; | |
679 | ||
680 | case sMaxStartups: | |
681 | arg = strdelim(&cp); | |
682 | if (!arg || *arg == '\0') | |
683 | fatal("%s line %d: Missing MaxStartups spec.", | |
684 | filename, linenum); | |
685 | if (sscanf(arg, "%d:%d:%d", | |
686 | &options->max_startups_begin, | |
687 | &options->max_startups_rate, | |
688 | &options->max_startups) == 3) { | |
689 | if (options->max_startups_begin > | |
690 | options->max_startups || | |
691 | options->max_startups_rate > 100 || | |
692 | options->max_startups_rate < 1) | |
693 | fatal("%s line %d: Illegal MaxStartups spec.", | |
694 | filename, linenum); | |
695 | break; | |
696 | } | |
697 | intptr = &options->max_startups; | |
698 | goto parse_int; | |
699 | ||
700 | default: | |
701 | fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n", | |
702 | filename, linenum, arg, opcode); | |
703 | exit(1); | |
704 | } | |
705 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
706 | fprintf(stderr, | |
707 | "%s line %d: garbage at end of line; \"%.200s\".\n", | |
708 | filename, linenum, arg); | |
709 | exit(1); | |
710 | } | |
711 | } | |
712 | fclose(f); | |
713 | if (bad_options > 0) { | |
714 | fprintf(stderr, "%s: terminating, %d bad configuration options\n", | |
715 | filename, bad_options); | |
716 | exit(1); | |
717 | } | |
718 | } |