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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 1.52 2000/10/11 20:14:39 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->host_key_file = NULL; | |
33 | options->host_dsa_key_file = NULL; | |
34 | options->pid_file = NULL; | |
35 | options->server_key_bits = -1; | |
36 | options->login_grace_time = -1; | |
37 | options->key_regeneration_time = -1; | |
38 | options->permit_root_login = -1; | |
39 | options->ignore_rhosts = -1; | |
40 | options->ignore_user_known_hosts = -1; | |
41 | options->print_motd = -1; | |
42 | options->check_mail = -1; | |
43 | options->x11_forwarding = -1; | |
44 | options->x11_display_offset = -1; | |
45 | options->xauth_location = NULL; | |
46 | options->strict_modes = -1; | |
47 | options->keepalives = -1; | |
48 | options->log_facility = (SyslogFacility) - 1; | |
49 | options->log_level = (LogLevel) - 1; | |
50 | options->rhosts_authentication = -1; | |
51 | options->rhosts_rsa_authentication = -1; | |
52 | options->rsa_authentication = -1; | |
53 | options->dsa_authentication = -1; | |
54 | #ifdef KRB4 | |
55 | options->kerberos_authentication = -1; | |
56 | options->kerberos_or_local_passwd = -1; | |
57 | options->kerberos_ticket_cleanup = -1; | |
58 | #endif | |
59 | #ifdef AFS | |
60 | options->kerberos_tgt_passing = -1; | |
61 | options->afs_token_passing = -1; | |
62 | #endif | |
63 | options->password_authentication = -1; | |
64 | options->kbd_interactive_authentication = -1; | |
65 | #ifdef SKEY | |
66 | options->skey_authentication = -1; | |
67 | #endif | |
68 | options->permit_empty_passwd = -1; | |
69 | options->use_login = -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->num_ports == 0) | |
87 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
88 | if (options->listen_addrs == NULL) | |
89 | add_listen_addr(options, NULL); | |
90 | if (options->host_key_file == NULL) | |
91 | options->host_key_file = HOST_KEY_FILE; | |
92 | if (options->host_dsa_key_file == NULL) | |
93 | options->host_dsa_key_file = HOST_DSA_KEY_FILE; | |
94 | if (options->pid_file == NULL) | |
95 | options->pid_file = SSH_DAEMON_PID_FILE; | |
96 | if (options->server_key_bits == -1) | |
97 | options->server_key_bits = 768; | |
98 | if (options->login_grace_time == -1) | |
99 | options->login_grace_time = 600; | |
100 | if (options->key_regeneration_time == -1) | |
101 | options->key_regeneration_time = 3600; | |
102 | if (options->permit_root_login == -1) | |
103 | options->permit_root_login = 1; /* yes */ | |
104 | if (options->ignore_rhosts == -1) | |
105 | options->ignore_rhosts = 1; | |
106 | if (options->ignore_user_known_hosts == -1) | |
107 | options->ignore_user_known_hosts = 0; | |
108 | if (options->check_mail == -1) | |
109 | options->check_mail = 0; | |
110 | if (options->print_motd == -1) | |
111 | options->print_motd = 1; | |
112 | if (options->x11_forwarding == -1) | |
113 | options->x11_forwarding = 0; | |
114 | if (options->x11_display_offset == -1) | |
115 | options->x11_display_offset = 10; | |
116 | #ifdef XAUTH_PATH | |
117 | if (options->xauth_location == NULL) | |
118 | options->xauth_location = XAUTH_PATH; | |
119 | #endif /* XAUTH_PATH */ | |
120 | if (options->strict_modes == -1) | |
121 | options->strict_modes = 1; | |
122 | if (options->keepalives == -1) | |
123 | options->keepalives = 1; | |
124 | if (options->log_facility == (SyslogFacility) (-1)) | |
125 | options->log_facility = SYSLOG_FACILITY_AUTH; | |
126 | if (options->log_level == (LogLevel) (-1)) | |
127 | options->log_level = SYSLOG_LEVEL_INFO; | |
128 | if (options->rhosts_authentication == -1) | |
129 | options->rhosts_authentication = 0; | |
130 | if (options->rhosts_rsa_authentication == -1) | |
131 | options->rhosts_rsa_authentication = 0; | |
132 | if (options->rsa_authentication == -1) | |
133 | options->rsa_authentication = 1; | |
134 | if (options->dsa_authentication == -1) | |
135 | options->dsa_authentication = 1; | |
136 | #ifdef KRB4 | |
137 | if (options->kerberos_authentication == -1) | |
138 | options->kerberos_authentication = (access(KEYFILE, R_OK) == 0); | |
139 | if (options->kerberos_or_local_passwd == -1) | |
140 | options->kerberos_or_local_passwd = 1; | |
141 | if (options->kerberos_ticket_cleanup == -1) | |
142 | options->kerberos_ticket_cleanup = 1; | |
143 | #endif /* KRB4 */ | |
144 | #ifdef AFS | |
145 | if (options->kerberos_tgt_passing == -1) | |
146 | options->kerberos_tgt_passing = 0; | |
147 | if (options->afs_token_passing == -1) | |
148 | options->afs_token_passing = k_hasafs(); | |
149 | #endif /* AFS */ | |
150 | if (options->password_authentication == -1) | |
151 | options->password_authentication = 1; | |
152 | if (options->kbd_interactive_authentication == -1) | |
153 | options->kbd_interactive_authentication = 0; | |
154 | #ifdef SKEY | |
155 | if (options->skey_authentication == -1) | |
156 | options->skey_authentication = 1; | |
157 | #endif | |
158 | if (options->permit_empty_passwd == -1) | |
159 | options->permit_empty_passwd = 0; | |
160 | if (options->use_login == -1) | |
161 | options->use_login = 0; | |
162 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
163 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
164 | if (options->gateway_ports == -1) | |
165 | options->gateway_ports = 0; | |
166 | if (options->max_startups == -1) | |
167 | options->max_startups = 10; | |
168 | if (options->max_startups_rate == -1) | |
169 | options->max_startups_rate = 100; /* 100% */ | |
170 | if (options->max_startups_begin == -1) | |
171 | options->max_startups_begin = options->max_startups; | |
172 | } | |
173 | ||
174 | /* Keyword tokens. */ | |
175 | typedef enum { | |
176 | sBadOption, /* == unknown option */ | |
177 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
178 | sPermitRootLogin, sLogFacility, sLogLevel, | |
179 | sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, | |
180 | #ifdef KRB4 | |
181 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, | |
182 | #endif | |
183 | #ifdef AFS | |
184 | sKerberosTgtPassing, sAFSTokenPassing, | |
185 | #endif | |
186 | #ifdef SKEY | |
187 | sSkeyAuthentication, | |
188 | #endif | |
189 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, | |
190 | sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, | |
191 | sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail, | |
192 | sUseLogin, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, | |
193 | sIgnoreUserKnownHosts, sHostDSAKeyFile, sCiphers, sProtocol, sPidFile, | |
194 | sGatewayPorts, sDSAAuthentication, sXAuthLocation, sSubsystem, sMaxStartups | |
195 | } ServerOpCodes; | |
196 | ||
197 | /* Textual representation of the tokens. */ | |
198 | static struct { | |
199 | const char *name; | |
200 | ServerOpCodes opcode; | |
201 | } keywords[] = { | |
202 | { "port", sPort }, | |
203 | { "hostkey", sHostKeyFile }, | |
204 | { "hostdsakey", sHostDSAKeyFile }, | |
205 | { "pidfile", sPidFile }, | |
206 | { "serverkeybits", sServerKeyBits }, | |
207 | { "logingracetime", sLoginGraceTime }, | |
208 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
209 | { "permitrootlogin", sPermitRootLogin }, | |
210 | { "syslogfacility", sLogFacility }, | |
211 | { "loglevel", sLogLevel }, | |
212 | { "rhostsauthentication", sRhostsAuthentication }, | |
213 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, | |
214 | { "rsaauthentication", sRSAAuthentication }, | |
215 | { "dsaauthentication", sDSAAuthentication }, | |
216 | #ifdef KRB4 | |
217 | { "kerberosauthentication", sKerberosAuthentication }, | |
218 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
219 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
220 | #endif | |
221 | #ifdef AFS | |
222 | { "kerberostgtpassing", sKerberosTgtPassing }, | |
223 | { "afstokenpassing", sAFSTokenPassing }, | |
224 | #endif | |
225 | { "passwordauthentication", sPasswordAuthentication }, | |
226 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, | |
227 | #ifdef SKEY | |
228 | { "skeyauthentication", sSkeyAuthentication }, | |
229 | #endif | |
230 | { "checkmail", sCheckMail }, | |
231 | { "listenaddress", sListenAddress }, | |
232 | { "printmotd", sPrintMotd }, | |
233 | { "ignorerhosts", sIgnoreRhosts }, | |
234 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
235 | { "x11forwarding", sX11Forwarding }, | |
236 | { "x11displayoffset", sX11DisplayOffset }, | |
237 | { "xauthlocation", sXAuthLocation }, | |
238 | { "strictmodes", sStrictModes }, | |
239 | { "permitemptypasswords", sEmptyPasswd }, | |
240 | { "uselogin", sUseLogin }, | |
241 | { "randomseed", sRandomSeedFile }, | |
242 | { "keepalive", sKeepAlives }, | |
243 | { "allowusers", sAllowUsers }, | |
244 | { "denyusers", sDenyUsers }, | |
245 | { "allowgroups", sAllowGroups }, | |
246 | { "denygroups", sDenyGroups }, | |
247 | { "ciphers", sCiphers }, | |
248 | { "protocol", sProtocol }, | |
249 | { "gatewayports", sGatewayPorts }, | |
250 | { "subsystem", sSubsystem }, | |
251 | { "maxstartups", sMaxStartups }, | |
252 | { NULL, 0 } | |
253 | }; | |
254 | ||
255 | /* | |
256 | * Returns the number of the token pointed to by cp of length len. Never | |
257 | * returns if the token is not known. | |
258 | */ | |
259 | ||
260 | static ServerOpCodes | |
261 | parse_token(const char *cp, const char *filename, | |
262 | int linenum) | |
263 | { | |
264 | unsigned int i; | |
265 | ||
266 | for (i = 0; keywords[i].name; i++) | |
267 | if (strcasecmp(cp, keywords[i].name) == 0) | |
268 | return keywords[i].opcode; | |
269 | ||
270 | fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", | |
271 | filename, linenum, cp); | |
272 | return sBadOption; | |
273 | } | |
274 | ||
275 | /* | |
276 | * add listen address | |
277 | */ | |
278 | void | |
279 | add_listen_addr(ServerOptions *options, char *addr) | |
280 | { | |
281 | extern int IPv4or6; | |
282 | struct addrinfo hints, *ai, *aitop; | |
283 | char strport[NI_MAXSERV]; | |
284 | int gaierr; | |
285 | int i; | |
286 | ||
287 | if (options->num_ports == 0) | |
288 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
289 | for (i = 0; i < options->num_ports; i++) { | |
290 | memset(&hints, 0, sizeof(hints)); | |
291 | hints.ai_family = IPv4or6; | |
292 | hints.ai_socktype = SOCK_STREAM; | |
293 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
294 | snprintf(strport, sizeof strport, "%d", options->ports[i]); | |
295 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) | |
296 | fatal("bad addr or host: %s (%s)\n", | |
297 | addr ? addr : "<NULL>", | |
298 | gai_strerror(gaierr)); | |
299 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
300 | ; | |
301 | ai->ai_next = options->listen_addrs; | |
302 | options->listen_addrs = aitop; | |
303 | } | |
304 | } | |
305 | ||
306 | /* Reads the server configuration file. */ | |
307 | ||
308 | void | |
309 | read_server_config(ServerOptions *options, const char *filename) | |
310 | { | |
311 | FILE *f; | |
312 | char line[1024]; | |
313 | char *cp, **charptr, *arg; | |
314 | int linenum, *intptr, value; | |
315 | int bad_options = 0; | |
316 | ServerOpCodes opcode; | |
317 | int i; | |
318 | ||
319 | f = fopen(filename, "r"); | |
320 | if (!f) { | |
321 | perror(filename); | |
322 | exit(1); | |
323 | } | |
324 | linenum = 0; | |
325 | while (fgets(line, sizeof(line), f)) { | |
326 | linenum++; | |
327 | cp = line; | |
328 | arg = strdelim(&cp); | |
329 | /* Ignore leading whitespace */ | |
330 | if (*arg == '\0') | |
331 | arg = strdelim(&cp); | |
332 | if (!*arg || *arg == '#') | |
333 | continue; | |
334 | opcode = parse_token(arg, filename, linenum); | |
335 | switch (opcode) { | |
336 | case sBadOption: | |
337 | bad_options++; | |
338 | continue; | |
339 | case sPort: | |
340 | /* ignore ports from configfile if cmdline specifies ports */ | |
341 | if (options->ports_from_cmdline) | |
342 | continue; | |
343 | if (options->listen_addrs != NULL) | |
344 | fatal("%s line %d: ports must be specified before " | |
345 | "ListenAdress.\n", filename, linenum); | |
346 | if (options->num_ports >= MAX_PORTS) | |
347 | fatal("%s line %d: too many ports.\n", | |
348 | filename, linenum); | |
349 | arg = strdelim(&cp); | |
350 | if (!arg || *arg == '\0') | |
351 | fatal("%s line %d: missing port number.\n", | |
352 | filename, linenum); | |
353 | options->ports[options->num_ports++] = atoi(arg); | |
354 | break; | |
355 | ||
356 | case sServerKeyBits: | |
357 | intptr = &options->server_key_bits; | |
358 | parse_int: | |
359 | arg = strdelim(&cp); | |
360 | if (!arg || *arg == '\0') { | |
361 | fprintf(stderr, "%s line %d: missing integer value.\n", | |
362 | filename, linenum); | |
363 | exit(1); | |
364 | } | |
365 | value = atoi(arg); | |
366 | if (*intptr == -1) | |
367 | *intptr = value; | |
368 | break; | |
369 | ||
370 | case sLoginGraceTime: | |
371 | intptr = &options->login_grace_time; | |
372 | goto parse_int; | |
373 | ||
374 | case sKeyRegenerationTime: | |
375 | intptr = &options->key_regeneration_time; | |
376 | goto parse_int; | |
377 | ||
378 | case sListenAddress: | |
379 | arg = strdelim(&cp); | |
380 | if (!arg || *arg == '\0') | |
381 | fatal("%s line %d: missing inet addr.\n", | |
382 | filename, linenum); | |
383 | add_listen_addr(options, arg); | |
384 | break; | |
385 | ||
386 | case sHostKeyFile: | |
387 | case sHostDSAKeyFile: | |
388 | charptr = (opcode == sHostKeyFile ) ? | |
389 | &options->host_key_file : &options->host_dsa_key_file; | |
390 | parse_filename: | |
391 | arg = strdelim(&cp); | |
392 | if (!arg || *arg == '\0') { | |
393 | fprintf(stderr, "%s line %d: missing file name.\n", | |
394 | filename, linenum); | |
395 | exit(1); | |
396 | } | |
397 | if (*charptr == NULL) | |
398 | *charptr = tilde_expand_filename(arg, getuid()); | |
399 | break; | |
400 | ||
401 | case sPidFile: | |
402 | charptr = &options->pid_file; | |
403 | goto parse_filename; | |
404 | ||
405 | case sRandomSeedFile: | |
406 | fprintf(stderr, "%s line %d: \"randomseed\" option is obsolete.\n", | |
407 | filename, linenum); | |
408 | arg = strdelim(&cp); | |
409 | break; | |
410 | ||
411 | case sPermitRootLogin: | |
412 | intptr = &options->permit_root_login; | |
413 | arg = strdelim(&cp); | |
414 | if (!arg || *arg == '\0') { | |
415 | fprintf(stderr, "%s line %d: missing yes/without-password/no argument.\n", | |
416 | filename, linenum); | |
417 | exit(1); | |
418 | } | |
419 | if (strcmp(arg, "without-password") == 0) | |
420 | value = 2; | |
421 | else if (strcmp(arg, "yes") == 0) | |
422 | value = 1; | |
423 | else if (strcmp(arg, "no") == 0) | |
424 | value = 0; | |
425 | else { | |
426 | fprintf(stderr, "%s line %d: Bad yes/without-password/no argument: %s\n", | |
427 | filename, linenum, arg); | |
428 | exit(1); | |
429 | } | |
430 | if (*intptr == -1) | |
431 | *intptr = value; | |
432 | break; | |
433 | ||
434 | case sIgnoreRhosts: | |
435 | intptr = &options->ignore_rhosts; | |
436 | parse_flag: | |
437 | arg = strdelim(&cp); | |
438 | if (!arg || *arg == '\0') { | |
439 | fprintf(stderr, "%s line %d: missing yes/no argument.\n", | |
440 | filename, linenum); | |
441 | exit(1); | |
442 | } | |
443 | if (strcmp(arg, "yes") == 0) | |
444 | value = 1; | |
445 | else if (strcmp(arg, "no") == 0) | |
446 | value = 0; | |
447 | else { | |
448 | fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n", | |
449 | filename, linenum, arg); | |
450 | exit(1); | |
451 | } | |
452 | if (*intptr == -1) | |
453 | *intptr = value; | |
454 | break; | |
455 | ||
456 | case sIgnoreUserKnownHosts: | |
457 | intptr = &options->ignore_user_known_hosts; | |
458 | goto parse_flag; | |
459 | ||
460 | case sRhostsAuthentication: | |
461 | intptr = &options->rhosts_authentication; | |
462 | goto parse_flag; | |
463 | ||
464 | case sRhostsRSAAuthentication: | |
465 | intptr = &options->rhosts_rsa_authentication; | |
466 | goto parse_flag; | |
467 | ||
468 | case sRSAAuthentication: | |
469 | intptr = &options->rsa_authentication; | |
470 | goto parse_flag; | |
471 | ||
472 | case sDSAAuthentication: | |
473 | intptr = &options->dsa_authentication; | |
474 | goto parse_flag; | |
475 | ||
476 | #ifdef KRB4 | |
477 | case sKerberosAuthentication: | |
478 | intptr = &options->kerberos_authentication; | |
479 | goto parse_flag; | |
480 | ||
481 | case sKerberosOrLocalPasswd: | |
482 | intptr = &options->kerberos_or_local_passwd; | |
483 | goto parse_flag; | |
484 | ||
485 | case sKerberosTicketCleanup: | |
486 | intptr = &options->kerberos_ticket_cleanup; | |
487 | goto parse_flag; | |
488 | #endif | |
489 | ||
490 | #ifdef AFS | |
491 | case sKerberosTgtPassing: | |
492 | intptr = &options->kerberos_tgt_passing; | |
493 | goto parse_flag; | |
494 | ||
495 | case sAFSTokenPassing: | |
496 | intptr = &options->afs_token_passing; | |
497 | goto parse_flag; | |
498 | #endif | |
499 | ||
500 | case sPasswordAuthentication: | |
501 | intptr = &options->password_authentication; | |
502 | goto parse_flag; | |
503 | ||
504 | case sKbdInteractiveAuthentication: | |
505 | intptr = &options->kbd_interactive_authentication; | |
506 | goto parse_flag; | |
507 | ||
508 | case sCheckMail: | |
509 | intptr = &options->check_mail; | |
510 | goto parse_flag; | |
511 | ||
512 | #ifdef SKEY | |
513 | case sSkeyAuthentication: | |
514 | intptr = &options->skey_authentication; | |
515 | goto parse_flag; | |
516 | #endif | |
517 | ||
518 | case sPrintMotd: | |
519 | intptr = &options->print_motd; | |
520 | goto parse_flag; | |
521 | ||
522 | case sX11Forwarding: | |
523 | intptr = &options->x11_forwarding; | |
524 | goto parse_flag; | |
525 | ||
526 | case sX11DisplayOffset: | |
527 | intptr = &options->x11_display_offset; | |
528 | goto parse_int; | |
529 | ||
530 | case sXAuthLocation: | |
531 | charptr = &options->xauth_location; | |
532 | goto parse_filename; | |
533 | ||
534 | case sStrictModes: | |
535 | intptr = &options->strict_modes; | |
536 | goto parse_flag; | |
537 | ||
538 | case sKeepAlives: | |
539 | intptr = &options->keepalives; | |
540 | goto parse_flag; | |
541 | ||
542 | case sEmptyPasswd: | |
543 | intptr = &options->permit_empty_passwd; | |
544 | goto parse_flag; | |
545 | ||
546 | case sUseLogin: | |
547 | intptr = &options->use_login; | |
548 | goto parse_flag; | |
549 | ||
550 | case sGatewayPorts: | |
551 | intptr = &options->gateway_ports; | |
552 | goto parse_flag; | |
553 | ||
554 | case sLogFacility: | |
555 | intptr = (int *) &options->log_facility; | |
556 | arg = strdelim(&cp); | |
557 | value = log_facility_number(arg); | |
558 | if (value == (SyslogFacility) - 1) | |
559 | fatal("%.200s line %d: unsupported log facility '%s'\n", | |
560 | filename, linenum, arg ? arg : "<NONE>"); | |
561 | if (*intptr == -1) | |
562 | *intptr = (SyslogFacility) value; | |
563 | break; | |
564 | ||
565 | case sLogLevel: | |
566 | intptr = (int *) &options->log_level; | |
567 | arg = strdelim(&cp); | |
568 | value = log_level_number(arg); | |
569 | if (value == (LogLevel) - 1) | |
570 | fatal("%.200s line %d: unsupported log level '%s'\n", | |
571 | filename, linenum, arg ? arg : "<NONE>"); | |
572 | if (*intptr == -1) | |
573 | *intptr = (LogLevel) value; | |
574 | break; | |
575 | ||
576 | case sAllowUsers: | |
577 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
578 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
579 | fatal("%s line %d: too many allow users.\n", | |
580 | filename, linenum); | |
581 | options->allow_users[options->num_allow_users++] = xstrdup(arg); | |
582 | } | |
583 | break; | |
584 | ||
585 | case sDenyUsers: | |
586 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
587 | if (options->num_deny_users >= MAX_DENY_USERS) | |
588 | fatal( "%s line %d: too many deny users.\n", | |
589 | filename, linenum); | |
590 | options->deny_users[options->num_deny_users++] = xstrdup(arg); | |
591 | } | |
592 | break; | |
593 | ||
594 | case sAllowGroups: | |
595 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
596 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
597 | fatal("%s line %d: too many allow groups.\n", | |
598 | filename, linenum); | |
599 | options->allow_groups[options->num_allow_groups++] = xstrdup(arg); | |
600 | } | |
601 | break; | |
602 | ||
603 | case sDenyGroups: | |
604 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
605 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
606 | fatal("%s line %d: too many deny groups.\n", | |
607 | filename, linenum); | |
608 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
609 | } | |
610 | break; | |
611 | ||
612 | case sCiphers: | |
613 | arg = strdelim(&cp); | |
614 | if (!arg || *arg == '\0') | |
615 | fatal("%s line %d: Missing argument.", filename, linenum); | |
616 | if (!ciphers_valid(arg)) | |
617 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
618 | filename, linenum, arg ? arg : "<NONE>"); | |
619 | if (options->ciphers == NULL) | |
620 | options->ciphers = xstrdup(arg); | |
621 | break; | |
622 | ||
623 | case sProtocol: | |
624 | intptr = &options->protocol; | |
625 | arg = strdelim(&cp); | |
626 | if (!arg || *arg == '\0') | |
627 | fatal("%s line %d: Missing argument.", filename, linenum); | |
628 | value = proto_spec(arg); | |
629 | if (value == SSH_PROTO_UNKNOWN) | |
630 | fatal("%s line %d: Bad protocol spec '%s'.", | |
631 | filename, linenum, arg ? arg : "<NONE>"); | |
632 | if (*intptr == SSH_PROTO_UNKNOWN) | |
633 | *intptr = value; | |
634 | break; | |
635 | ||
636 | case sSubsystem: | |
637 | if(options->num_subsystems >= MAX_SUBSYSTEMS) { | |
638 | fatal("%s line %d: too many subsystems defined.", | |
639 | filename, linenum); | |
640 | } | |
641 | arg = strdelim(&cp); | |
642 | if (!arg || *arg == '\0') | |
643 | fatal("%s line %d: Missing subsystem name.", | |
644 | filename, linenum); | |
645 | for (i = 0; i < options->num_subsystems; i++) | |
646 | if(strcmp(arg, options->subsystem_name[i]) == 0) | |
647 | fatal("%s line %d: Subsystem '%s' already defined.", | |
648 | filename, linenum, arg); | |
649 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
650 | arg = strdelim(&cp); | |
651 | if (!arg || *arg == '\0') | |
652 | fatal("%s line %d: Missing subsystem command.", | |
653 | filename, linenum); | |
654 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
655 | options->num_subsystems++; | |
656 | break; | |
657 | ||
658 | case sMaxStartups: | |
659 | arg = strdelim(&cp); | |
660 | if (!arg || *arg == '\0') | |
661 | fatal("%s line %d: Missing MaxStartups spec.", | |
662 | filename, linenum); | |
663 | if (sscanf(arg, "%d:%d:%d", | |
664 | &options->max_startups_begin, | |
665 | &options->max_startups_rate, | |
666 | &options->max_startups) == 3) { | |
667 | if (options->max_startups_begin > | |
668 | options->max_startups || | |
669 | options->max_startups_rate > 100 || | |
670 | options->max_startups_rate < 1) | |
671 | fatal("%s line %d: Illegal MaxStartups spec.", | |
672 | filename, linenum); | |
673 | break; | |
674 | } | |
675 | intptr = &options->max_startups; | |
676 | goto parse_int; | |
677 | ||
678 | default: | |
679 | fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n", | |
680 | filename, linenum, arg, opcode); | |
681 | exit(1); | |
682 | } | |
683 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
684 | fprintf(stderr, | |
685 | "%s line %d: garbage at end of line; \"%.200s\".\n", | |
686 | filename, linenum, arg); | |
687 | exit(1); | |
688 | } | |
689 | } | |
690 | fclose(f); | |
691 | if (bad_options > 0) { | |
692 | fprintf(stderr, "%s: terminating, %d bad configuration options\n", | |
693 | filename, bad_options); | |
694 | exit(1); | |
695 | } | |
696 | } |