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1 | /* $OpenBSD: servconf.c,v 1.186 2008/07/04 03:44:59 djm Exp $ */ | |
2 | /* | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * | |
6 | * As far as I am concerned, the code I have written for this software | |
7 | * can be used freely for any purpose. Any derived versions of this | |
8 | * software must be clearly marked as such, and if the derived work is | |
9 | * incompatible with the protocol description in the RFC file, it must be | |
10 | * called by a name other than "ssh" or "Secure Shell". | |
11 | */ | |
12 | ||
13 | #include "includes.h" | |
14 | ||
15 | #include <sys/types.h> | |
16 | #include <sys/socket.h> | |
17 | ||
18 | #include <netdb.h> | |
19 | #include <pwd.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <signal.h> | |
24 | #include <unistd.h> | |
25 | #include <stdarg.h> | |
26 | #include <errno.h> | |
27 | ||
28 | #include "openbsd-compat/sys-queue.h" | |
29 | #include "xmalloc.h" | |
30 | #include "ssh.h" | |
31 | #include "log.h" | |
32 | #include "buffer.h" | |
33 | #include "servconf.h" | |
34 | #include "compat.h" | |
35 | #include "pathnames.h" | |
36 | #include "misc.h" | |
37 | #include "cipher.h" | |
38 | #include "key.h" | |
39 | #include "kex.h" | |
40 | #include "mac.h" | |
41 | #include "match.h" | |
42 | #include "channels.h" | |
43 | #include "groupaccess.h" | |
44 | ||
45 | static void add_listen_addr(ServerOptions *, char *, u_short); | |
46 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
47 | ||
48 | /* Use of privilege separation or not */ | |
49 | extern int use_privsep; | |
50 | extern Buffer cfg; | |
51 | ||
52 | /* Initializes the server options to their default values. */ | |
53 | ||
54 | void | |
55 | initialize_server_options(ServerOptions *options) | |
56 | { | |
57 | memset(options, 0, sizeof(*options)); | |
58 | ||
59 | /* Portable-specific options */ | |
60 | options->use_pam = -1; | |
61 | ||
62 | /* Standard Options */ | |
63 | options->num_ports = 0; | |
64 | options->ports_from_cmdline = 0; | |
65 | options->listen_addrs = NULL; | |
66 | options->address_family = -1; | |
67 | options->num_host_key_files = 0; | |
68 | options->pid_file = NULL; | |
69 | options->server_key_bits = -1; | |
70 | options->login_grace_time = -1; | |
71 | options->key_regeneration_time = -1; | |
72 | options->permit_root_login = PERMIT_NOT_SET; | |
73 | options->ignore_rhosts = -1; | |
74 | options->ignore_user_known_hosts = -1; | |
75 | options->print_motd = -1; | |
76 | options->print_lastlog = -1; | |
77 | options->x11_forwarding = -1; | |
78 | options->x11_display_offset = -1; | |
79 | options->x11_use_localhost = -1; | |
80 | options->xauth_location = NULL; | |
81 | options->strict_modes = -1; | |
82 | options->tcp_keep_alive = -1; | |
83 | options->log_facility = SYSLOG_FACILITY_NOT_SET; | |
84 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
85 | options->rhosts_rsa_authentication = -1; | |
86 | options->hostbased_authentication = -1; | |
87 | options->hostbased_uses_name_from_packet_only = -1; | |
88 | options->rsa_authentication = -1; | |
89 | options->pubkey_authentication = -1; | |
90 | options->kerberos_authentication = -1; | |
91 | options->kerberos_or_local_passwd = -1; | |
92 | options->kerberos_ticket_cleanup = -1; | |
93 | #ifdef SESSION_HOOKS | |
94 | options->session_hooks_allow = -1; | |
95 | options->session_hooks_startup_cmd = NULL; | |
96 | options->session_hooks_shutdown_cmd = NULL; | |
97 | #endif | |
98 | options->kerberos_get_afs_token = -1; | |
99 | options->gss_authentication = -1; | |
100 | options->gss_deleg_creds = -1; | |
101 | options->gss_keyex = -1; | |
102 | options->gss_cleanup_creds = -1; | |
103 | options->gss_strict_acceptor = -1; | |
104 | options->gsi_allow_limited_proxy = -1; | |
105 | options->password_authentication = -1; | |
106 | options->kbd_interactive_authentication = -1; | |
107 | options->challenge_response_authentication = -1; | |
108 | options->permit_empty_passwd = -1; | |
109 | options->permit_user_env = -1; | |
110 | options->use_login = -1; | |
111 | options->compression = -1; | |
112 | options->allow_tcp_forwarding = -1; | |
113 | options->allow_agent_forwarding = -1; | |
114 | options->num_allow_users = 0; | |
115 | options->num_deny_users = 0; | |
116 | options->num_allow_groups = 0; | |
117 | options->num_deny_groups = 0; | |
118 | options->ciphers = NULL; | |
119 | options->macs = NULL; | |
120 | options->protocol = SSH_PROTO_UNKNOWN; | |
121 | options->gateway_ports = -1; | |
122 | options->num_subsystems = 0; | |
123 | options->max_startups_begin = -1; | |
124 | options->max_startups_rate = -1; | |
125 | options->max_startups = -1; | |
126 | options->max_authtries = -1; | |
127 | options->max_sessions = -1; | |
128 | options->banner = NULL; | |
129 | options->use_dns = -1; | |
130 | options->client_alive_interval = -1; | |
131 | options->client_alive_count_max = -1; | |
132 | options->authorized_keys_file = NULL; | |
133 | options->authorized_keys_file2 = NULL; | |
134 | options->num_accept_env = 0; | |
135 | options->permit_tun = -1; | |
136 | options->num_permitted_opens = -1; | |
137 | options->adm_forced_command = NULL; | |
138 | options->chroot_directory = NULL; | |
139 | options->none_enabled = -1; | |
140 | options->tcp_rcv_buf_poll = -1; | |
141 | options->hpn_disabled = -1; | |
142 | options->hpn_buffer_size = -1; | |
143 | } | |
144 | ||
145 | void | |
146 | fill_default_server_options(ServerOptions *options) | |
147 | { | |
148 | int sock; | |
149 | int socksize; | |
150 | int socksizelen = sizeof(int); | |
151 | ||
152 | /* Portable-specific options */ | |
153 | if (options->use_pam == -1) | |
154 | options->use_pam = 0; | |
155 | ||
156 | /* Standard Options */ | |
157 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
158 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
159 | if (options->num_host_key_files == 0) { | |
160 | /* fill default hostkeys for protocols */ | |
161 | if (options->protocol & SSH_PROTO_1) | |
162 | options->host_key_files[options->num_host_key_files++] = | |
163 | _PATH_HOST_KEY_FILE; | |
164 | if (options->protocol & SSH_PROTO_2) { | |
165 | options->host_key_files[options->num_host_key_files++] = | |
166 | _PATH_HOST_RSA_KEY_FILE; | |
167 | options->host_key_files[options->num_host_key_files++] = | |
168 | _PATH_HOST_DSA_KEY_FILE; | |
169 | } | |
170 | } | |
171 | if (options->num_ports == 0) | |
172 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
173 | if (options->listen_addrs == NULL) | |
174 | add_listen_addr(options, NULL, 0); | |
175 | if (options->pid_file == NULL) | |
176 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; | |
177 | if (options->server_key_bits == -1) | |
178 | options->server_key_bits = 1024; | |
179 | if (options->login_grace_time == -1) | |
180 | options->login_grace_time = 120; | |
181 | if (options->key_regeneration_time == -1) | |
182 | options->key_regeneration_time = 3600; | |
183 | if (options->permit_root_login == PERMIT_NOT_SET) | |
184 | options->permit_root_login = PERMIT_YES; | |
185 | if (options->ignore_rhosts == -1) | |
186 | options->ignore_rhosts = 1; | |
187 | if (options->ignore_user_known_hosts == -1) | |
188 | options->ignore_user_known_hosts = 0; | |
189 | if (options->print_motd == -1) | |
190 | options->print_motd = 1; | |
191 | if (options->print_lastlog == -1) | |
192 | options->print_lastlog = 1; | |
193 | if (options->x11_forwarding == -1) | |
194 | options->x11_forwarding = 0; | |
195 | if (options->x11_display_offset == -1) | |
196 | options->x11_display_offset = 10; | |
197 | if (options->x11_use_localhost == -1) | |
198 | options->x11_use_localhost = 1; | |
199 | if (options->xauth_location == NULL) | |
200 | options->xauth_location = _PATH_XAUTH; | |
201 | if (options->strict_modes == -1) | |
202 | options->strict_modes = 1; | |
203 | if (options->tcp_keep_alive == -1) | |
204 | options->tcp_keep_alive = 1; | |
205 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) | |
206 | options->log_facility = SYSLOG_FACILITY_AUTH; | |
207 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) | |
208 | options->log_level = SYSLOG_LEVEL_INFO; | |
209 | if (options->rhosts_rsa_authentication == -1) | |
210 | options->rhosts_rsa_authentication = 0; | |
211 | if (options->hostbased_authentication == -1) | |
212 | options->hostbased_authentication = 0; | |
213 | if (options->hostbased_uses_name_from_packet_only == -1) | |
214 | options->hostbased_uses_name_from_packet_only = 0; | |
215 | if (options->rsa_authentication == -1) | |
216 | options->rsa_authentication = 1; | |
217 | if (options->pubkey_authentication == -1) | |
218 | options->pubkey_authentication = 1; | |
219 | if (options->kerberos_authentication == -1) | |
220 | options->kerberos_authentication = 0; | |
221 | if (options->kerberos_or_local_passwd == -1) | |
222 | options->kerberos_or_local_passwd = 1; | |
223 | if (options->kerberos_ticket_cleanup == -1) | |
224 | options->kerberos_ticket_cleanup = 1; | |
225 | if (options->kerberos_get_afs_token == -1) | |
226 | options->kerberos_get_afs_token = 0; | |
227 | if (options->gss_authentication == -1) | |
228 | options->gss_authentication = 1; | |
229 | if (options->gss_deleg_creds == -1) | |
230 | options->gss_deleg_creds = 1; | |
231 | if (options->gss_keyex == -1) | |
232 | options->gss_keyex = 1; | |
233 | if (options->gss_cleanup_creds == -1) | |
234 | options->gss_cleanup_creds = 1; | |
235 | if (options->gss_strict_acceptor == -1) | |
236 | options->gss_strict_acceptor = 1; | |
237 | if (options->gsi_allow_limited_proxy == -1) | |
238 | options->gsi_allow_limited_proxy = 0; | |
239 | if (options->password_authentication == -1) | |
240 | options->password_authentication = 1; | |
241 | if (options->kbd_interactive_authentication == -1) | |
242 | options->kbd_interactive_authentication = 0; | |
243 | if (options->challenge_response_authentication == -1) | |
244 | options->challenge_response_authentication = 1; | |
245 | if (options->permit_empty_passwd == -1) | |
246 | options->permit_empty_passwd = 0; | |
247 | if (options->permit_user_env == -1) | |
248 | options->permit_user_env = 0; | |
249 | if (options->use_login == -1) | |
250 | options->use_login = 0; | |
251 | if (options->compression == -1) | |
252 | options->compression = COMP_DELAYED; | |
253 | if (options->allow_tcp_forwarding == -1) | |
254 | options->allow_tcp_forwarding = 1; | |
255 | if (options->allow_agent_forwarding == -1) | |
256 | options->allow_agent_forwarding = 1; | |
257 | if (options->gateway_ports == -1) | |
258 | options->gateway_ports = 0; | |
259 | if (options->max_startups == -1) | |
260 | options->max_startups = 10; | |
261 | if (options->max_startups_rate == -1) | |
262 | options->max_startups_rate = 100; /* 100% */ | |
263 | if (options->max_startups_begin == -1) | |
264 | options->max_startups_begin = options->max_startups; | |
265 | if (options->max_authtries == -1) | |
266 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; | |
267 | if (options->max_sessions == -1) | |
268 | options->max_sessions = DEFAULT_SESSIONS_MAX; | |
269 | if (options->use_dns == -1) | |
270 | options->use_dns = 1; | |
271 | if (options->client_alive_interval == -1) | |
272 | options->client_alive_interval = 0; | |
273 | if (options->client_alive_count_max == -1) | |
274 | options->client_alive_count_max = 3; | |
275 | if (options->authorized_keys_file2 == NULL) { | |
276 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
277 | if (options->authorized_keys_file != NULL) | |
278 | options->authorized_keys_file2 = options->authorized_keys_file; | |
279 | else | |
280 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
281 | } | |
282 | if (options->authorized_keys_file == NULL) | |
283 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
284 | if (options->permit_tun == -1) | |
285 | options->permit_tun = SSH_TUNMODE_NO; | |
286 | ||
287 | if (options->hpn_disabled == -1) | |
288 | options->hpn_disabled = 0; | |
289 | ||
290 | if (options->hpn_buffer_size == -1) { | |
291 | /* option not explicitly set. Now we have to figure out */ | |
292 | /* what value to use */ | |
293 | if (options->hpn_disabled == 1) { | |
294 | options->hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT; | |
295 | } else { | |
296 | /* get the current RCV size and set it to that */ | |
297 | /*create a socket but don't connect it */ | |
298 | /* we use that the get the rcv socket size */ | |
299 | sock = socket(AF_INET, SOCK_STREAM, 0); | |
300 | getsockopt(sock, SOL_SOCKET, SO_RCVBUF, | |
301 | &socksize, &socksizelen); | |
302 | close(sock); | |
303 | options->hpn_buffer_size = socksize; | |
304 | debug ("HPN Buffer Size: %d", options->hpn_buffer_size); | |
305 | ||
306 | } | |
307 | } else { | |
308 | /* we have to do this incase the user sets both values in a contradictory */ | |
309 | /* manner. hpn_disabled overrrides hpn_buffer_size*/ | |
310 | if (options->hpn_disabled <= 0) { | |
311 | if (options->hpn_buffer_size == 0) | |
312 | options->hpn_buffer_size = 1; | |
313 | /* limit the maximum buffer to 64MB */ | |
314 | if (options->hpn_buffer_size > 64*1024) { | |
315 | options->hpn_buffer_size = 64*1024*1024; | |
316 | } else { | |
317 | options->hpn_buffer_size *= 1024; | |
318 | } | |
319 | } else | |
320 | options->hpn_buffer_size = CHAN_TCP_WINDOW_DEFAULT; | |
321 | } | |
322 | ||
323 | /* Turn privilege separation on by default */ | |
324 | if (use_privsep == -1) | |
325 | use_privsep = 1; | |
326 | ||
327 | #ifndef HAVE_MMAP | |
328 | if (use_privsep && options->compression == 1) { | |
329 | error("This platform does not support both privilege " | |
330 | "separation and compression"); | |
331 | error("Compression disabled"); | |
332 | options->compression = 0; | |
333 | } | |
334 | #endif | |
335 | ||
336 | } | |
337 | ||
338 | /* Keyword tokens. */ | |
339 | typedef enum { | |
340 | sBadOption, /* == unknown option */ | |
341 | /* Portable-specific options */ | |
342 | sUsePAM, | |
343 | /* Standard Options */ | |
344 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
345 | sPermitRootLogin, sLogFacility, sLogLevel, | |
346 | sRhostsRSAAuthentication, sRSAAuthentication, | |
347 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, | |
348 | sKerberosGetAFSToken, | |
349 | sKerberosTgtPassing, sChallengeResponseAuthentication, | |
350 | #ifdef SESSION_HOOKS | |
351 | sAllowSessionHooks, sSessionHookStartupCmd, sSessionHookShutdownCmd, | |
352 | #endif | |
353 | sPasswordAuthentication, sKbdInteractiveAuthentication, | |
354 | sListenAddress, sAddressFamily, | |
355 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, | |
356 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, | |
357 | sStrictModes, sEmptyPasswd, sTCPKeepAlive, | |
358 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, | |
359 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, | |
360 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, | |
361 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, | |
362 | sMaxStartups, sMaxAuthTries, sMaxSessions, | |
363 | sBanner, sUseDNS, sHostbasedAuthentication, | |
364 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, | |
365 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, | |
366 | sGssAuthentication, sGssCleanupCreds, | |
367 | sGssDelegateCreds, | |
368 | sGssStrictAcceptor, | |
369 | sGssKeyEx, | |
370 | sGssCredsPath, | |
371 | sGsiAllowLimitedProxy, | |
372 | sAcceptEnv, sPermitTunnel, | |
373 | sMatch, sPermitOpen, sForceCommand, sChrootDirectory, | |
374 | sNoneEnabled, sTcpRcvBufPoll, | |
375 | sHPNDisabled, sHPNBufferSize, | |
376 | sUsePrivilegeSeparation, sAllowAgentForwarding, | |
377 | sDeprecated, sUnsupported | |
378 | } ServerOpCodes; | |
379 | ||
380 | #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */ | |
381 | #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */ | |
382 | #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH) | |
383 | ||
384 | /* Textual representation of the tokens. */ | |
385 | static struct { | |
386 | const char *name; | |
387 | ServerOpCodes opcode; | |
388 | u_int flags; | |
389 | } keywords[] = { | |
390 | /* Portable-specific options */ | |
391 | #ifdef USE_PAM | |
392 | { "usepam", sUsePAM, SSHCFG_GLOBAL }, | |
393 | #else | |
394 | { "usepam", sUnsupported, SSHCFG_GLOBAL }, | |
395 | #endif | |
396 | { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL }, | |
397 | /* Standard Options */ | |
398 | { "port", sPort, SSHCFG_GLOBAL }, | |
399 | { "hostkey", sHostKeyFile, SSHCFG_GLOBAL }, | |
400 | { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */ | |
401 | { "pidfile", sPidFile, SSHCFG_GLOBAL }, | |
402 | { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL }, | |
403 | { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL }, | |
404 | { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL }, | |
405 | { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL }, | |
406 | { "syslogfacility", sLogFacility, SSHCFG_GLOBAL }, | |
407 | { "loglevel", sLogLevel, SSHCFG_GLOBAL }, | |
408 | { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL }, | |
409 | { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, | |
410 | { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, | |
411 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL }, | |
412 | { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, | |
413 | { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, | |
414 | { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ | |
415 | #ifdef KRB5 | |
416 | { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, | |
417 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, | |
418 | { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, | |
419 | #ifdef USE_AFS | |
420 | { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, | |
421 | #else | |
422 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, | |
423 | #endif | |
424 | #else | |
425 | { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, | |
426 | { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, | |
427 | { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, | |
428 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, | |
429 | #endif | |
430 | { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, | |
431 | { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, | |
432 | #ifdef GSSAPI | |
433 | { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, | |
434 | { "gssapidelegatecredentials", sGssDelegateCreds, SSHCFG_ALL }, | |
435 | { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, | |
436 | { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL }, | |
437 | { "gssapicredentialspath", sGssCredsPath, SSHCFG_GLOBAL }, | |
438 | { "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL }, | |
439 | #ifdef GSI | |
440 | { "gsiallowlimitedproxy", sGsiAllowLimitedProxy, SSHCFG_GLOBAL }, | |
441 | #endif | |
442 | #else | |
443 | { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, | |
444 | { "gssapidelegatecredentials", sUnsupported, SSHCFG_ALL }, | |
445 | { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, | |
446 | { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL }, | |
447 | { "gssapicredentialspath", sUnsupported, SSHCFG_GLOBAL }, | |
448 | { "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL }, | |
449 | #ifdef GSI | |
450 | { "gsiallowlimitedproxy", sUnsupported, SSHCFG_GLOBAL }, | |
451 | #endif | |
452 | #endif | |
453 | #ifdef SESSION_HOOKS | |
454 | { "allowsessionhooks", sAllowSessionHooks, SSHCFG_GLOBAL }, | |
455 | { "sessionhookstartupcmd", sSessionHookStartupCmd, SSHCFG_GLOBAL }, | |
456 | { "sessionhookshutdowncmd", sSessionHookShutdownCmd, SSHCFG_GLOBAL }, | |
457 | #endif | |
458 | { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, | |
459 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, | |
460 | { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, | |
461 | { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */ | |
462 | { "checkmail", sDeprecated, SSHCFG_GLOBAL }, | |
463 | { "listenaddress", sListenAddress, SSHCFG_GLOBAL }, | |
464 | { "addressfamily", sAddressFamily, SSHCFG_GLOBAL }, | |
465 | { "printmotd", sPrintMotd, SSHCFG_GLOBAL }, | |
466 | { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL }, | |
467 | { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL }, | |
468 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL }, | |
469 | { "x11forwarding", sX11Forwarding, SSHCFG_ALL }, | |
470 | { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL }, | |
471 | { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL }, | |
472 | { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL }, | |
473 | { "strictmodes", sStrictModes, SSHCFG_GLOBAL }, | |
474 | { "permitemptypasswords", sEmptyPasswd, SSHCFG_GLOBAL }, | |
475 | { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL }, | |
476 | { "uselogin", sUseLogin, SSHCFG_GLOBAL }, | |
477 | { "compression", sCompression, SSHCFG_GLOBAL }, | |
478 | { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, | |
479 | { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */ | |
480 | { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL }, | |
481 | { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL }, | |
482 | { "allowusers", sAllowUsers, SSHCFG_GLOBAL }, | |
483 | { "denyusers", sDenyUsers, SSHCFG_GLOBAL }, | |
484 | { "allowgroups", sAllowGroups, SSHCFG_GLOBAL }, | |
485 | { "denygroups", sDenyGroups, SSHCFG_GLOBAL }, | |
486 | { "ciphers", sCiphers, SSHCFG_GLOBAL }, | |
487 | { "macs", sMacs, SSHCFG_GLOBAL }, | |
488 | { "protocol", sProtocol, SSHCFG_GLOBAL }, | |
489 | { "gatewayports", sGatewayPorts, SSHCFG_ALL }, | |
490 | { "subsystem", sSubsystem, SSHCFG_GLOBAL }, | |
491 | { "maxstartups", sMaxStartups, SSHCFG_GLOBAL }, | |
492 | { "maxauthtries", sMaxAuthTries, SSHCFG_ALL }, | |
493 | { "maxsessions", sMaxSessions, SSHCFG_ALL }, | |
494 | { "banner", sBanner, SSHCFG_ALL }, | |
495 | { "usedns", sUseDNS, SSHCFG_GLOBAL }, | |
496 | { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL }, | |
497 | { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL }, | |
498 | { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL }, | |
499 | { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL }, | |
500 | { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL }, | |
501 | { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL }, | |
502 | { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL }, | |
503 | { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL }, | |
504 | { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL }, | |
505 | { "match", sMatch, SSHCFG_ALL }, | |
506 | { "permitopen", sPermitOpen, SSHCFG_ALL }, | |
507 | { "forcecommand", sForceCommand, SSHCFG_ALL }, | |
508 | { "chrootdirectory", sChrootDirectory, SSHCFG_ALL }, | |
509 | { "noneenabled", sNoneEnabled }, | |
510 | { "hpndisabled", sHPNDisabled }, | |
511 | { "hpnbuffersize", sHPNBufferSize }, | |
512 | { "tcprcvbufpoll", sTcpRcvBufPoll }, | |
513 | { NULL, sBadOption, 0 } | |
514 | }; | |
515 | ||
516 | static struct { | |
517 | int val; | |
518 | char *text; | |
519 | } tunmode_desc[] = { | |
520 | { SSH_TUNMODE_NO, "no" }, | |
521 | { SSH_TUNMODE_POINTOPOINT, "point-to-point" }, | |
522 | { SSH_TUNMODE_ETHERNET, "ethernet" }, | |
523 | { SSH_TUNMODE_YES, "yes" }, | |
524 | { -1, NULL } | |
525 | }; | |
526 | ||
527 | /* | |
528 | * Returns the number of the token pointed to by cp or sBadOption. | |
529 | */ | |
530 | ||
531 | static ServerOpCodes | |
532 | parse_token(const char *cp, const char *filename, | |
533 | int linenum, u_int *flags) | |
534 | { | |
535 | u_int i; | |
536 | ||
537 | for (i = 0; keywords[i].name; i++) | |
538 | if (strcasecmp(cp, keywords[i].name) == 0) { | |
539 | debug ("Config token is %s", keywords[i].name); | |
540 | *flags = keywords[i].flags; | |
541 | return keywords[i].opcode; | |
542 | } | |
543 | ||
544 | error("%s: line %d: Bad configuration option: %s", | |
545 | filename, linenum, cp); | |
546 | return sBadOption; | |
547 | } | |
548 | ||
549 | static void | |
550 | add_listen_addr(ServerOptions *options, char *addr, u_short port) | |
551 | { | |
552 | u_int i; | |
553 | ||
554 | if (options->num_ports == 0) | |
555 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
556 | if (options->address_family == -1) | |
557 | options->address_family = AF_UNSPEC; | |
558 | if (port == 0) | |
559 | for (i = 0; i < options->num_ports; i++) | |
560 | add_one_listen_addr(options, addr, options->ports[i]); | |
561 | else | |
562 | add_one_listen_addr(options, addr, port); | |
563 | } | |
564 | ||
565 | static void | |
566 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) | |
567 | { | |
568 | struct addrinfo hints, *ai, *aitop; | |
569 | char strport[NI_MAXSERV]; | |
570 | int gaierr; | |
571 | ||
572 | memset(&hints, 0, sizeof(hints)); | |
573 | hints.ai_family = options->address_family; | |
574 | hints.ai_socktype = SOCK_STREAM; | |
575 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
576 | snprintf(strport, sizeof strport, "%u", port); | |
577 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) | |
578 | fatal("bad addr or host: %s (%s)", | |
579 | addr ? addr : "<NULL>", | |
580 | ssh_gai_strerror(gaierr)); | |
581 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
582 | ; | |
583 | ai->ai_next = options->listen_addrs; | |
584 | options->listen_addrs = aitop; | |
585 | } | |
586 | ||
587 | /* | |
588 | * The strategy for the Match blocks is that the config file is parsed twice. | |
589 | * | |
590 | * The first time is at startup. activep is initialized to 1 and the | |
591 | * directives in the global context are processed and acted on. Hitting a | |
592 | * Match directive unsets activep and the directives inside the block are | |
593 | * checked for syntax only. | |
594 | * | |
595 | * The second time is after a connection has been established but before | |
596 | * authentication. activep is initialized to 2 and global config directives | |
597 | * are ignored since they have already been processed. If the criteria in a | |
598 | * Match block is met, activep is set and the subsequent directives | |
599 | * processed and actioned until EOF or another Match block unsets it. Any | |
600 | * options set are copied into the main server config. | |
601 | * | |
602 | * Potential additions/improvements: | |
603 | * - Add Match support for pre-kex directives, eg Protocol, Ciphers. | |
604 | * | |
605 | * - Add a Tag directive (idea from David Leonard) ala pf, eg: | |
606 | * Match Address 192.168.0.* | |
607 | * Tag trusted | |
608 | * Match Group wheel | |
609 | * Tag trusted | |
610 | * Match Tag trusted | |
611 | * AllowTcpForwarding yes | |
612 | * GatewayPorts clientspecified | |
613 | * [...] | |
614 | * | |
615 | * - Add a PermittedChannelRequests directive | |
616 | * Match Group shell | |
617 | * PermittedChannelRequests session,forwarded-tcpip | |
618 | */ | |
619 | ||
620 | static int | |
621 | match_cfg_line_group(const char *grps, int line, const char *user) | |
622 | { | |
623 | int result = 0; | |
624 | struct passwd *pw; | |
625 | ||
626 | if (user == NULL) | |
627 | goto out; | |
628 | ||
629 | if ((pw = getpwnam(user)) == NULL) { | |
630 | debug("Can't match group at line %d because user %.100s does " | |
631 | "not exist", line, user); | |
632 | } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) { | |
633 | debug("Can't Match group because user %.100s not in any group " | |
634 | "at line %d", user, line); | |
635 | } else if (ga_match_pattern_list(grps) != 1) { | |
636 | debug("user %.100s does not match group list %.100s at line %d", | |
637 | user, grps, line); | |
638 | } else { | |
639 | debug("user %.100s matched group list %.100s at line %d", user, | |
640 | grps, line); | |
641 | result = 1; | |
642 | } | |
643 | out: | |
644 | ga_free(); | |
645 | return result; | |
646 | } | |
647 | ||
648 | static int | |
649 | match_cfg_line(char **condition, int line, const char *user, const char *host, | |
650 | const char *address) | |
651 | { | |
652 | int result = 1; | |
653 | char *arg, *attrib, *cp = *condition; | |
654 | size_t len; | |
655 | ||
656 | if (user == NULL) | |
657 | debug3("checking syntax for 'Match %s'", cp); | |
658 | else | |
659 | debug3("checking match for '%s' user %s host %s addr %s", cp, | |
660 | user ? user : "(null)", host ? host : "(null)", | |
661 | address ? address : "(null)"); | |
662 | ||
663 | while ((attrib = strdelim(&cp)) && *attrib != '\0') { | |
664 | if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { | |
665 | error("Missing Match criteria for %s", attrib); | |
666 | return -1; | |
667 | } | |
668 | len = strlen(arg); | |
669 | if (strcasecmp(attrib, "user") == 0) { | |
670 | if (!user) { | |
671 | result = 0; | |
672 | continue; | |
673 | } | |
674 | if (match_pattern_list(user, arg, len, 0) != 1) | |
675 | result = 0; | |
676 | else | |
677 | debug("user %.100s matched 'User %.100s' at " | |
678 | "line %d", user, arg, line); | |
679 | } else if (strcasecmp(attrib, "group") == 0) { | |
680 | switch (match_cfg_line_group(arg, line, user)) { | |
681 | case -1: | |
682 | return -1; | |
683 | case 0: | |
684 | result = 0; | |
685 | } | |
686 | } else if (strcasecmp(attrib, "host") == 0) { | |
687 | if (!host) { | |
688 | result = 0; | |
689 | continue; | |
690 | } | |
691 | if (match_hostname(host, arg, len) != 1) | |
692 | result = 0; | |
693 | else | |
694 | debug("connection from %.100s matched 'Host " | |
695 | "%.100s' at line %d", host, arg, line); | |
696 | } else if (strcasecmp(attrib, "address") == 0) { | |
697 | switch (addr_match_list(address, arg)) { | |
698 | case 1: | |
699 | debug("connection from %.100s matched 'Address " | |
700 | "%.100s' at line %d", address, arg, line); | |
701 | break; | |
702 | case 0: | |
703 | case -1: | |
704 | result = 0; | |
705 | break; | |
706 | case -2: | |
707 | return -1; | |
708 | } | |
709 | } else { | |
710 | error("Unsupported Match attribute %s", attrib); | |
711 | return -1; | |
712 | } | |
713 | } | |
714 | if (user != NULL) | |
715 | debug3("match %sfound", result ? "" : "not "); | |
716 | *condition = cp; | |
717 | return result; | |
718 | } | |
719 | ||
720 | #define WHITESPACE " \t\r\n" | |
721 | ||
722 | int | |
723 | process_server_config_line(ServerOptions *options, char *line, | |
724 | const char *filename, int linenum, int *activep, const char *user, | |
725 | const char *host, const char *address) | |
726 | { | |
727 | char *cp, **charptr, *arg, *p; | |
728 | int cmdline = 0, *intptr, value, n; | |
729 | SyslogFacility *log_facility_ptr; | |
730 | LogLevel *log_level_ptr; | |
731 | ServerOpCodes opcode; | |
732 | u_short port; | |
733 | u_int i, flags = 0; | |
734 | size_t len; | |
735 | ||
736 | cp = line; | |
737 | if ((arg = strdelim(&cp)) == NULL) | |
738 | return 0; | |
739 | /* Ignore leading whitespace */ | |
740 | if (*arg == '\0') | |
741 | arg = strdelim(&cp); | |
742 | if (!arg || !*arg || *arg == '#') | |
743 | return 0; | |
744 | intptr = NULL; | |
745 | charptr = NULL; | |
746 | opcode = parse_token(arg, filename, linenum, &flags); | |
747 | ||
748 | if (activep == NULL) { /* We are processing a command line directive */ | |
749 | cmdline = 1; | |
750 | activep = &cmdline; | |
751 | } | |
752 | if (*activep && opcode != sMatch) | |
753 | debug3("%s:%d setting %s %s", filename, linenum, arg, cp); | |
754 | if (*activep == 0 && !(flags & SSHCFG_MATCH)) { | |
755 | if (user == NULL) { | |
756 | fatal("%s line %d: Directive '%s' is not allowed " | |
757 | "within a Match block", filename, linenum, arg); | |
758 | } else { /* this is a directive we have already processed */ | |
759 | while (arg) | |
760 | arg = strdelim(&cp); | |
761 | return 0; | |
762 | } | |
763 | } | |
764 | ||
765 | switch (opcode) { | |
766 | /* Portable-specific options */ | |
767 | case sUsePAM: | |
768 | intptr = &options->use_pam; | |
769 | goto parse_flag; | |
770 | ||
771 | /* Standard Options */ | |
772 | case sBadOption: | |
773 | return -1; | |
774 | case sPort: | |
775 | /* ignore ports from configfile if cmdline specifies ports */ | |
776 | if (options->ports_from_cmdline) | |
777 | return 0; | |
778 | if (options->listen_addrs != NULL) | |
779 | fatal("%s line %d: ports must be specified before " | |
780 | "ListenAddress.", filename, linenum); | |
781 | if (options->num_ports >= MAX_PORTS) | |
782 | fatal("%s line %d: too many ports.", | |
783 | filename, linenum); | |
784 | arg = strdelim(&cp); | |
785 | if (!arg || *arg == '\0') | |
786 | fatal("%s line %d: missing port number.", | |
787 | filename, linenum); | |
788 | options->ports[options->num_ports++] = a2port(arg); | |
789 | if (options->ports[options->num_ports-1] == 0) | |
790 | fatal("%s line %d: Badly formatted port number.", | |
791 | filename, linenum); | |
792 | break; | |
793 | ||
794 | case sServerKeyBits: | |
795 | intptr = &options->server_key_bits; | |
796 | parse_int: | |
797 | arg = strdelim(&cp); | |
798 | if (!arg || *arg == '\0') | |
799 | fatal("%s line %d: missing integer value.", | |
800 | filename, linenum); | |
801 | value = atoi(arg); | |
802 | if (*activep && *intptr == -1) | |
803 | *intptr = value; | |
804 | break; | |
805 | ||
806 | case sLoginGraceTime: | |
807 | intptr = &options->login_grace_time; | |
808 | parse_time: | |
809 | arg = strdelim(&cp); | |
810 | if (!arg || *arg == '\0') | |
811 | fatal("%s line %d: missing time value.", | |
812 | filename, linenum); | |
813 | if ((value = convtime(arg)) == -1) | |
814 | fatal("%s line %d: invalid time value.", | |
815 | filename, linenum); | |
816 | if (*intptr == -1) | |
817 | *intptr = value; | |
818 | break; | |
819 | ||
820 | case sKeyRegenerationTime: | |
821 | intptr = &options->key_regeneration_time; | |
822 | goto parse_time; | |
823 | ||
824 | case sListenAddress: | |
825 | arg = strdelim(&cp); | |
826 | if (arg == NULL || *arg == '\0') | |
827 | fatal("%s line %d: missing address", | |
828 | filename, linenum); | |
829 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ | |
830 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL | |
831 | && strchr(p+1, ':') != NULL) { | |
832 | add_listen_addr(options, arg, 0); | |
833 | break; | |
834 | } | |
835 | p = hpdelim(&arg); | |
836 | if (p == NULL) | |
837 | fatal("%s line %d: bad address:port usage", | |
838 | filename, linenum); | |
839 | p = cleanhostname(p); | |
840 | if (arg == NULL) | |
841 | port = 0; | |
842 | else if ((port = a2port(arg)) == 0) | |
843 | fatal("%s line %d: bad port number", filename, linenum); | |
844 | ||
845 | add_listen_addr(options, p, port); | |
846 | ||
847 | break; | |
848 | ||
849 | case sAddressFamily: | |
850 | arg = strdelim(&cp); | |
851 | if (!arg || *arg == '\0') | |
852 | fatal("%s line %d: missing address family.", | |
853 | filename, linenum); | |
854 | intptr = &options->address_family; | |
855 | if (options->listen_addrs != NULL) | |
856 | fatal("%s line %d: address family must be specified before " | |
857 | "ListenAddress.", filename, linenum); | |
858 | if (strcasecmp(arg, "inet") == 0) | |
859 | value = AF_INET; | |
860 | else if (strcasecmp(arg, "inet6") == 0) | |
861 | value = AF_INET6; | |
862 | else if (strcasecmp(arg, "any") == 0) | |
863 | value = AF_UNSPEC; | |
864 | else | |
865 | fatal("%s line %d: unsupported address family \"%s\".", | |
866 | filename, linenum, arg); | |
867 | if (*intptr == -1) | |
868 | *intptr = value; | |
869 | break; | |
870 | ||
871 | case sHostKeyFile: | |
872 | intptr = &options->num_host_key_files; | |
873 | if (*intptr >= MAX_HOSTKEYS) | |
874 | fatal("%s line %d: too many host keys specified (max %d).", | |
875 | filename, linenum, MAX_HOSTKEYS); | |
876 | charptr = &options->host_key_files[*intptr]; | |
877 | parse_filename: | |
878 | arg = strdelim(&cp); | |
879 | if (!arg || *arg == '\0') | |
880 | fatal("%s line %d: missing file name.", | |
881 | filename, linenum); | |
882 | if (*activep && *charptr == NULL) { | |
883 | *charptr = tilde_expand_filename(arg, getuid()); | |
884 | /* increase optional counter */ | |
885 | if (intptr != NULL) | |
886 | *intptr = *intptr + 1; | |
887 | } | |
888 | break; | |
889 | ||
890 | case sPidFile: | |
891 | charptr = &options->pid_file; | |
892 | goto parse_filename; | |
893 | ||
894 | case sPermitRootLogin: | |
895 | intptr = &options->permit_root_login; | |
896 | arg = strdelim(&cp); | |
897 | if (!arg || *arg == '\0') | |
898 | fatal("%s line %d: missing yes/" | |
899 | "without-password/forced-commands-only/no " | |
900 | "argument.", filename, linenum); | |
901 | value = 0; /* silence compiler */ | |
902 | if (strcmp(arg, "without-password") == 0) | |
903 | value = PERMIT_NO_PASSWD; | |
904 | else if (strcmp(arg, "forced-commands-only") == 0) | |
905 | value = PERMIT_FORCED_ONLY; | |
906 | else if (strcmp(arg, "yes") == 0) | |
907 | value = PERMIT_YES; | |
908 | else if (strcmp(arg, "no") == 0) | |
909 | value = PERMIT_NO; | |
910 | else | |
911 | fatal("%s line %d: Bad yes/" | |
912 | "without-password/forced-commands-only/no " | |
913 | "argument: %s", filename, linenum, arg); | |
914 | if (*activep && *intptr == -1) | |
915 | *intptr = value; | |
916 | break; | |
917 | ||
918 | case sIgnoreRhosts: | |
919 | intptr = &options->ignore_rhosts; | |
920 | parse_flag: | |
921 | arg = strdelim(&cp); | |
922 | if (!arg || *arg == '\0') | |
923 | fatal("%s line %d: missing yes/no argument.", | |
924 | filename, linenum); | |
925 | value = 0; /* silence compiler */ | |
926 | if (strcmp(arg, "yes") == 0) | |
927 | value = 1; | |
928 | else if (strcmp(arg, "no") == 0) | |
929 | value = 0; | |
930 | else | |
931 | fatal("%s line %d: Bad yes/no argument: %s", | |
932 | filename, linenum, arg); | |
933 | if (*activep && *intptr == -1) | |
934 | *intptr = value; | |
935 | break; | |
936 | ||
937 | case sNoneEnabled: | |
938 | intptr = &options->none_enabled; | |
939 | goto parse_flag; | |
940 | ||
941 | case sTcpRcvBufPoll: | |
942 | intptr = &options->tcp_rcv_buf_poll; | |
943 | goto parse_flag; | |
944 | ||
945 | case sHPNDisabled: | |
946 | intptr = &options->hpn_disabled; | |
947 | goto parse_flag; | |
948 | ||
949 | case sHPNBufferSize: | |
950 | intptr = &options->hpn_buffer_size; | |
951 | goto parse_int; | |
952 | ||
953 | case sIgnoreUserKnownHosts: | |
954 | intptr = &options->ignore_user_known_hosts; | |
955 | goto parse_flag; | |
956 | ||
957 | case sRhostsRSAAuthentication: | |
958 | intptr = &options->rhosts_rsa_authentication; | |
959 | goto parse_flag; | |
960 | ||
961 | case sHostbasedAuthentication: | |
962 | intptr = &options->hostbased_authentication; | |
963 | goto parse_flag; | |
964 | ||
965 | case sHostbasedUsesNameFromPacketOnly: | |
966 | intptr = &options->hostbased_uses_name_from_packet_only; | |
967 | goto parse_flag; | |
968 | ||
969 | case sRSAAuthentication: | |
970 | intptr = &options->rsa_authentication; | |
971 | goto parse_flag; | |
972 | ||
973 | case sPubkeyAuthentication: | |
974 | intptr = &options->pubkey_authentication; | |
975 | goto parse_flag; | |
976 | ||
977 | case sKerberosAuthentication: | |
978 | intptr = &options->kerberos_authentication; | |
979 | goto parse_flag; | |
980 | ||
981 | case sKerberosOrLocalPasswd: | |
982 | intptr = &options->kerberos_or_local_passwd; | |
983 | goto parse_flag; | |
984 | ||
985 | case sKerberosTicketCleanup: | |
986 | intptr = &options->kerberos_ticket_cleanup; | |
987 | goto parse_flag; | |
988 | ||
989 | case sKerberosGetAFSToken: | |
990 | intptr = &options->kerberos_get_afs_token; | |
991 | goto parse_flag; | |
992 | ||
993 | case sGssAuthentication: | |
994 | intptr = &options->gss_authentication; | |
995 | goto parse_flag; | |
996 | ||
997 | case sGssDelegateCreds: | |
998 | intptr = &options->gss_deleg_creds; | |
999 | goto parse_flag; | |
1000 | ||
1001 | case sGssKeyEx: | |
1002 | intptr = &options->gss_keyex; | |
1003 | goto parse_flag; | |
1004 | ||
1005 | case sGssCleanupCreds: | |
1006 | intptr = &options->gss_cleanup_creds; | |
1007 | goto parse_flag; | |
1008 | ||
1009 | case sGssStrictAcceptor: | |
1010 | intptr = &options->gss_strict_acceptor; | |
1011 | goto parse_flag; | |
1012 | ||
1013 | case sGssCredsPath: | |
1014 | charptr = &options->gss_creds_path; | |
1015 | goto parse_filename; | |
1016 | ||
1017 | case sGsiAllowLimitedProxy: | |
1018 | intptr = &options->gsi_allow_limited_proxy; | |
1019 | goto parse_flag; | |
1020 | ||
1021 | #ifdef SESSION_HOOKS | |
1022 | case sAllowSessionHooks: | |
1023 | intptr = &options->session_hooks_allow; | |
1024 | goto parse_flag; | |
1025 | case sSessionHookStartupCmd: | |
1026 | case sSessionHookShutdownCmd: | |
1027 | arg = strdelim(&cp); | |
1028 | if (!arg || *arg == '\0') | |
1029 | fatal("%s line %d: empty session hook command", | |
1030 | filename, linenum); | |
1031 | if (opcode==sSessionHookStartupCmd) | |
1032 | options->session_hooks_startup_cmd = strdup(arg); | |
1033 | else | |
1034 | options->session_hooks_shutdown_cmd = strdup(arg); | |
1035 | break; | |
1036 | #endif | |
1037 | ||
1038 | case sPasswordAuthentication: | |
1039 | intptr = &options->password_authentication; | |
1040 | goto parse_flag; | |
1041 | ||
1042 | case sKbdInteractiveAuthentication: | |
1043 | intptr = &options->kbd_interactive_authentication; | |
1044 | goto parse_flag; | |
1045 | ||
1046 | case sChallengeResponseAuthentication: | |
1047 | intptr = &options->challenge_response_authentication; | |
1048 | goto parse_flag; | |
1049 | ||
1050 | case sPrintMotd: | |
1051 | intptr = &options->print_motd; | |
1052 | goto parse_flag; | |
1053 | ||
1054 | case sPrintLastLog: | |
1055 | intptr = &options->print_lastlog; | |
1056 | goto parse_flag; | |
1057 | ||
1058 | case sX11Forwarding: | |
1059 | intptr = &options->x11_forwarding; | |
1060 | goto parse_flag; | |
1061 | ||
1062 | case sX11DisplayOffset: | |
1063 | intptr = &options->x11_display_offset; | |
1064 | goto parse_int; | |
1065 | ||
1066 | case sX11UseLocalhost: | |
1067 | intptr = &options->x11_use_localhost; | |
1068 | goto parse_flag; | |
1069 | ||
1070 | case sXAuthLocation: | |
1071 | charptr = &options->xauth_location; | |
1072 | goto parse_filename; | |
1073 | ||
1074 | case sStrictModes: | |
1075 | intptr = &options->strict_modes; | |
1076 | goto parse_flag; | |
1077 | ||
1078 | case sTCPKeepAlive: | |
1079 | intptr = &options->tcp_keep_alive; | |
1080 | goto parse_flag; | |
1081 | ||
1082 | case sEmptyPasswd: | |
1083 | intptr = &options->permit_empty_passwd; | |
1084 | goto parse_flag; | |
1085 | ||
1086 | case sPermitUserEnvironment: | |
1087 | intptr = &options->permit_user_env; | |
1088 | goto parse_flag; | |
1089 | ||
1090 | case sUseLogin: | |
1091 | intptr = &options->use_login; | |
1092 | goto parse_flag; | |
1093 | ||
1094 | case sCompression: | |
1095 | intptr = &options->compression; | |
1096 | arg = strdelim(&cp); | |
1097 | if (!arg || *arg == '\0') | |
1098 | fatal("%s line %d: missing yes/no/delayed " | |
1099 | "argument.", filename, linenum); | |
1100 | value = 0; /* silence compiler */ | |
1101 | if (strcmp(arg, "delayed") == 0) | |
1102 | value = COMP_DELAYED; | |
1103 | else if (strcmp(arg, "yes") == 0) | |
1104 | value = COMP_ZLIB; | |
1105 | else if (strcmp(arg, "no") == 0) | |
1106 | value = COMP_NONE; | |
1107 | else | |
1108 | fatal("%s line %d: Bad yes/no/delayed " | |
1109 | "argument: %s", filename, linenum, arg); | |
1110 | if (*intptr == -1) | |
1111 | *intptr = value; | |
1112 | break; | |
1113 | ||
1114 | case sGatewayPorts: | |
1115 | intptr = &options->gateway_ports; | |
1116 | arg = strdelim(&cp); | |
1117 | if (!arg || *arg == '\0') | |
1118 | fatal("%s line %d: missing yes/no/clientspecified " | |
1119 | "argument.", filename, linenum); | |
1120 | value = 0; /* silence compiler */ | |
1121 | if (strcmp(arg, "clientspecified") == 0) | |
1122 | value = 2; | |
1123 | else if (strcmp(arg, "yes") == 0) | |
1124 | value = 1; | |
1125 | else if (strcmp(arg, "no") == 0) | |
1126 | value = 0; | |
1127 | else | |
1128 | fatal("%s line %d: Bad yes/no/clientspecified " | |
1129 | "argument: %s", filename, linenum, arg); | |
1130 | if (*activep && *intptr == -1) | |
1131 | *intptr = value; | |
1132 | break; | |
1133 | ||
1134 | case sUseDNS: | |
1135 | intptr = &options->use_dns; | |
1136 | goto parse_flag; | |
1137 | ||
1138 | case sLogFacility: | |
1139 | log_facility_ptr = &options->log_facility; | |
1140 | arg = strdelim(&cp); | |
1141 | value = log_facility_number(arg); | |
1142 | if (value == SYSLOG_FACILITY_NOT_SET) | |
1143 | fatal("%.200s line %d: unsupported log facility '%s'", | |
1144 | filename, linenum, arg ? arg : "<NONE>"); | |
1145 | if (*log_facility_ptr == -1) | |
1146 | *log_facility_ptr = (SyslogFacility) value; | |
1147 | break; | |
1148 | ||
1149 | case sLogLevel: | |
1150 | log_level_ptr = &options->log_level; | |
1151 | arg = strdelim(&cp); | |
1152 | value = log_level_number(arg); | |
1153 | if (value == SYSLOG_LEVEL_NOT_SET) | |
1154 | fatal("%.200s line %d: unsupported log level '%s'", | |
1155 | filename, linenum, arg ? arg : "<NONE>"); | |
1156 | if (*log_level_ptr == -1) | |
1157 | *log_level_ptr = (LogLevel) value; | |
1158 | break; | |
1159 | ||
1160 | case sAllowTcpForwarding: | |
1161 | intptr = &options->allow_tcp_forwarding; | |
1162 | goto parse_flag; | |
1163 | ||
1164 | case sAllowAgentForwarding: | |
1165 | intptr = &options->allow_agent_forwarding; | |
1166 | goto parse_flag; | |
1167 | ||
1168 | case sUsePrivilegeSeparation: | |
1169 | intptr = &use_privsep; | |
1170 | goto parse_flag; | |
1171 | ||
1172 | case sAllowUsers: | |
1173 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1174 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
1175 | fatal("%s line %d: too many allow users.", | |
1176 | filename, linenum); | |
1177 | options->allow_users[options->num_allow_users++] = | |
1178 | xstrdup(arg); | |
1179 | } | |
1180 | break; | |
1181 | ||
1182 | case sDenyUsers: | |
1183 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1184 | if (options->num_deny_users >= MAX_DENY_USERS) | |
1185 | fatal("%s line %d: too many deny users.", | |
1186 | filename, linenum); | |
1187 | options->deny_users[options->num_deny_users++] = | |
1188 | xstrdup(arg); | |
1189 | } | |
1190 | break; | |
1191 | ||
1192 | case sAllowGroups: | |
1193 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1194 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
1195 | fatal("%s line %d: too many allow groups.", | |
1196 | filename, linenum); | |
1197 | options->allow_groups[options->num_allow_groups++] = | |
1198 | xstrdup(arg); | |
1199 | } | |
1200 | break; | |
1201 | ||
1202 | case sDenyGroups: | |
1203 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1204 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
1205 | fatal("%s line %d: too many deny groups.", | |
1206 | filename, linenum); | |
1207 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
1208 | } | |
1209 | break; | |
1210 | ||
1211 | case sCiphers: | |
1212 | arg = strdelim(&cp); | |
1213 | if (!arg || *arg == '\0') | |
1214 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1215 | if (!ciphers_valid(arg)) | |
1216 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
1217 | filename, linenum, arg ? arg : "<NONE>"); | |
1218 | if (options->ciphers == NULL) | |
1219 | options->ciphers = xstrdup(arg); | |
1220 | break; | |
1221 | ||
1222 | case sMacs: | |
1223 | arg = strdelim(&cp); | |
1224 | if (!arg || *arg == '\0') | |
1225 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1226 | if (!mac_valid(arg)) | |
1227 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
1228 | filename, linenum, arg ? arg : "<NONE>"); | |
1229 | if (options->macs == NULL) | |
1230 | options->macs = xstrdup(arg); | |
1231 | break; | |
1232 | ||
1233 | case sProtocol: | |
1234 | intptr = &options->protocol; | |
1235 | arg = strdelim(&cp); | |
1236 | if (!arg || *arg == '\0') | |
1237 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1238 | value = proto_spec(arg); | |
1239 | if (value == SSH_PROTO_UNKNOWN) | |
1240 | fatal("%s line %d: Bad protocol spec '%s'.", | |
1241 | filename, linenum, arg ? arg : "<NONE>"); | |
1242 | if (*intptr == SSH_PROTO_UNKNOWN) | |
1243 | *intptr = value; | |
1244 | break; | |
1245 | ||
1246 | case sSubsystem: | |
1247 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
1248 | fatal("%s line %d: too many subsystems defined.", | |
1249 | filename, linenum); | |
1250 | } | |
1251 | arg = strdelim(&cp); | |
1252 | if (!arg || *arg == '\0') | |
1253 | fatal("%s line %d: Missing subsystem name.", | |
1254 | filename, linenum); | |
1255 | if (!*activep) { | |
1256 | arg = strdelim(&cp); | |
1257 | break; | |
1258 | } | |
1259 | for (i = 0; i < options->num_subsystems; i++) | |
1260 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
1261 | fatal("%s line %d: Subsystem '%s' already defined.", | |
1262 | filename, linenum, arg); | |
1263 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
1264 | arg = strdelim(&cp); | |
1265 | if (!arg || *arg == '\0') | |
1266 | fatal("%s line %d: Missing subsystem command.", | |
1267 | filename, linenum); | |
1268 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
1269 | ||
1270 | /* Collect arguments (separate to executable) */ | |
1271 | p = xstrdup(arg); | |
1272 | len = strlen(p) + 1; | |
1273 | while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
1274 | len += 1 + strlen(arg); | |
1275 | p = xrealloc(p, 1, len); | |
1276 | strlcat(p, " ", len); | |
1277 | strlcat(p, arg, len); | |
1278 | } | |
1279 | options->subsystem_args[options->num_subsystems] = p; | |
1280 | options->num_subsystems++; | |
1281 | break; | |
1282 | ||
1283 | case sMaxStartups: | |
1284 | arg = strdelim(&cp); | |
1285 | if (!arg || *arg == '\0') | |
1286 | fatal("%s line %d: Missing MaxStartups spec.", | |
1287 | filename, linenum); | |
1288 | if ((n = sscanf(arg, "%d:%d:%d", | |
1289 | &options->max_startups_begin, | |
1290 | &options->max_startups_rate, | |
1291 | &options->max_startups)) == 3) { | |
1292 | if (options->max_startups_begin > | |
1293 | options->max_startups || | |
1294 | options->max_startups_rate > 100 || | |
1295 | options->max_startups_rate < 1) | |
1296 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1297 | filename, linenum); | |
1298 | } else if (n != 1) | |
1299 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1300 | filename, linenum); | |
1301 | else | |
1302 | options->max_startups = options->max_startups_begin; | |
1303 | break; | |
1304 | ||
1305 | case sMaxAuthTries: | |
1306 | intptr = &options->max_authtries; | |
1307 | goto parse_int; | |
1308 | ||
1309 | case sMaxSessions: | |
1310 | intptr = &options->max_sessions; | |
1311 | goto parse_int; | |
1312 | ||
1313 | case sBanner: | |
1314 | charptr = &options->banner; | |
1315 | goto parse_filename; | |
1316 | ||
1317 | /* | |
1318 | * These options can contain %X options expanded at | |
1319 | * connect time, so that you can specify paths like: | |
1320 | * | |
1321 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
1322 | */ | |
1323 | case sAuthorizedKeysFile: | |
1324 | case sAuthorizedKeysFile2: | |
1325 | charptr = (opcode == sAuthorizedKeysFile) ? | |
1326 | &options->authorized_keys_file : | |
1327 | &options->authorized_keys_file2; | |
1328 | goto parse_filename; | |
1329 | ||
1330 | case sClientAliveInterval: | |
1331 | intptr = &options->client_alive_interval; | |
1332 | goto parse_time; | |
1333 | ||
1334 | case sClientAliveCountMax: | |
1335 | intptr = &options->client_alive_count_max; | |
1336 | goto parse_int; | |
1337 | ||
1338 | case sAcceptEnv: | |
1339 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1340 | if (strchr(arg, '=') != NULL) | |
1341 | fatal("%s line %d: Invalid environment name.", | |
1342 | filename, linenum); | |
1343 | if (options->num_accept_env >= MAX_ACCEPT_ENV) | |
1344 | fatal("%s line %d: too many allow env.", | |
1345 | filename, linenum); | |
1346 | if (!*activep) | |
1347 | break; | |
1348 | options->accept_env[options->num_accept_env++] = | |
1349 | xstrdup(arg); | |
1350 | } | |
1351 | break; | |
1352 | ||
1353 | case sPermitTunnel: | |
1354 | intptr = &options->permit_tun; | |
1355 | arg = strdelim(&cp); | |
1356 | if (!arg || *arg == '\0') | |
1357 | fatal("%s line %d: Missing yes/point-to-point/" | |
1358 | "ethernet/no argument.", filename, linenum); | |
1359 | value = -1; | |
1360 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1361 | if (strcmp(tunmode_desc[i].text, arg) == 0) { | |
1362 | value = tunmode_desc[i].val; | |
1363 | break; | |
1364 | } | |
1365 | if (value == -1) | |
1366 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
1367 | "no argument: %s", filename, linenum, arg); | |
1368 | if (*intptr == -1) | |
1369 | *intptr = value; | |
1370 | break; | |
1371 | ||
1372 | case sMatch: | |
1373 | if (cmdline) | |
1374 | fatal("Match directive not supported as a command-line " | |
1375 | "option"); | |
1376 | value = match_cfg_line(&cp, linenum, user, host, address); | |
1377 | if (value < 0) | |
1378 | fatal("%s line %d: Bad Match condition", filename, | |
1379 | linenum); | |
1380 | *activep = value; | |
1381 | break; | |
1382 | ||
1383 | case sPermitOpen: | |
1384 | arg = strdelim(&cp); | |
1385 | if (!arg || *arg == '\0') | |
1386 | fatal("%s line %d: missing PermitOpen specification", | |
1387 | filename, linenum); | |
1388 | n = options->num_permitted_opens; /* modified later */ | |
1389 | if (strcmp(arg, "any") == 0) { | |
1390 | if (*activep && n == -1) { | |
1391 | channel_clear_adm_permitted_opens(); | |
1392 | options->num_permitted_opens = 0; | |
1393 | } | |
1394 | break; | |
1395 | } | |
1396 | if (*activep && n == -1) | |
1397 | channel_clear_adm_permitted_opens(); | |
1398 | for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { | |
1399 | p = hpdelim(&arg); | |
1400 | if (p == NULL) | |
1401 | fatal("%s line %d: missing host in PermitOpen", | |
1402 | filename, linenum); | |
1403 | p = cleanhostname(p); | |
1404 | if (arg == NULL || (port = a2port(arg)) == 0) | |
1405 | fatal("%s line %d: bad port number in " | |
1406 | "PermitOpen", filename, linenum); | |
1407 | if (*activep && n == -1) | |
1408 | options->num_permitted_opens = | |
1409 | channel_add_adm_permitted_opens(p, port); | |
1410 | } | |
1411 | break; | |
1412 | ||
1413 | case sForceCommand: | |
1414 | if (cp == NULL) | |
1415 | fatal("%.200s line %d: Missing argument.", filename, | |
1416 | linenum); | |
1417 | len = strspn(cp, WHITESPACE); | |
1418 | if (*activep && options->adm_forced_command == NULL) | |
1419 | options->adm_forced_command = xstrdup(cp + len); | |
1420 | return 0; | |
1421 | ||
1422 | case sChrootDirectory: | |
1423 | charptr = &options->chroot_directory; | |
1424 | ||
1425 | arg = strdelim(&cp); | |
1426 | if (!arg || *arg == '\0') | |
1427 | fatal("%s line %d: missing file name.", | |
1428 | filename, linenum); | |
1429 | if (*activep && *charptr == NULL) | |
1430 | *charptr = xstrdup(arg); | |
1431 | break; | |
1432 | ||
1433 | case sDeprecated: | |
1434 | logit("%s line %d: Deprecated option %s", | |
1435 | filename, linenum, arg); | |
1436 | while (arg) | |
1437 | arg = strdelim(&cp); | |
1438 | break; | |
1439 | ||
1440 | case sUnsupported: | |
1441 | logit("%s line %d: Unsupported option %s", | |
1442 | filename, linenum, arg); | |
1443 | while (arg) | |
1444 | arg = strdelim(&cp); | |
1445 | break; | |
1446 | ||
1447 | default: | |
1448 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
1449 | filename, linenum, arg, opcode); | |
1450 | } | |
1451 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
1452 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
1453 | filename, linenum, arg); | |
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | /* Reads the server configuration file. */ | |
1458 | ||
1459 | void | |
1460 | load_server_config(const char *filename, Buffer *conf) | |
1461 | { | |
1462 | char line[1024], *cp; | |
1463 | FILE *f; | |
1464 | ||
1465 | debug2("%s: filename %s", __func__, filename); | |
1466 | if ((f = fopen(filename, "r")) == NULL) { | |
1467 | perror(filename); | |
1468 | exit(1); | |
1469 | } | |
1470 | buffer_clear(conf); | |
1471 | while (fgets(line, sizeof(line), f)) { | |
1472 | /* | |
1473 | * Trim out comments and strip whitespace | |
1474 | * NB - preserve newlines, they are needed to reproduce | |
1475 | * line numbers later for error messages | |
1476 | */ | |
1477 | if ((cp = strchr(line, '#')) != NULL) | |
1478 | memcpy(cp, "\n", 2); | |
1479 | cp = line + strspn(line, " \t\r"); | |
1480 | ||
1481 | buffer_append(conf, cp, strlen(cp)); | |
1482 | } | |
1483 | buffer_append(conf, "\0", 1); | |
1484 | fclose(f); | |
1485 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); | |
1486 | } | |
1487 | ||
1488 | void | |
1489 | parse_server_match_config(ServerOptions *options, const char *user, | |
1490 | const char *host, const char *address) | |
1491 | { | |
1492 | ServerOptions mo; | |
1493 | ||
1494 | initialize_server_options(&mo); | |
1495 | parse_server_config(&mo, "reprocess config", &cfg, user, host, address); | |
1496 | copy_set_server_options(options, &mo, 0); | |
1497 | } | |
1498 | ||
1499 | /* Helper macros */ | |
1500 | #define M_CP_INTOPT(n) do {\ | |
1501 | if (src->n != -1) \ | |
1502 | dst->n = src->n; \ | |
1503 | } while (0) | |
1504 | #define M_CP_STROPT(n) do {\ | |
1505 | if (src->n != NULL) { \ | |
1506 | if (dst->n != NULL) \ | |
1507 | xfree(dst->n); \ | |
1508 | dst->n = src->n; \ | |
1509 | } \ | |
1510 | } while(0) | |
1511 | ||
1512 | /* | |
1513 | * Copy any supported values that are set. | |
1514 | * | |
1515 | * If the preauth flag is set, we do not bother copying the the string or | |
1516 | * array values that are not used pre-authentication, because any that we | |
1517 | * do use must be explictly sent in mm_getpwnamallow(). | |
1518 | */ | |
1519 | void | |
1520 | copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) | |
1521 | { | |
1522 | M_CP_INTOPT(password_authentication); | |
1523 | M_CP_INTOPT(gss_authentication); | |
1524 | M_CP_INTOPT(gss_deleg_creds); | |
1525 | M_CP_INTOPT(rsa_authentication); | |
1526 | M_CP_INTOPT(pubkey_authentication); | |
1527 | M_CP_INTOPT(kerberos_authentication); | |
1528 | M_CP_INTOPT(hostbased_authentication); | |
1529 | M_CP_INTOPT(kbd_interactive_authentication); | |
1530 | M_CP_INTOPT(permit_root_login); | |
1531 | ||
1532 | M_CP_INTOPT(allow_tcp_forwarding); | |
1533 | M_CP_INTOPT(allow_agent_forwarding); | |
1534 | M_CP_INTOPT(gateway_ports); | |
1535 | M_CP_INTOPT(x11_display_offset); | |
1536 | M_CP_INTOPT(x11_forwarding); | |
1537 | M_CP_INTOPT(x11_use_localhost); | |
1538 | M_CP_INTOPT(max_sessions); | |
1539 | M_CP_INTOPT(max_authtries); | |
1540 | ||
1541 | M_CP_STROPT(banner); | |
1542 | if (preauth) | |
1543 | return; | |
1544 | M_CP_STROPT(adm_forced_command); | |
1545 | M_CP_STROPT(chroot_directory); | |
1546 | } | |
1547 | ||
1548 | #undef M_CP_INTOPT | |
1549 | #undef M_CP_STROPT | |
1550 | ||
1551 | void | |
1552 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, | |
1553 | const char *user, const char *host, const char *address) | |
1554 | { | |
1555 | int active, linenum, bad_options = 0; | |
1556 | char *cp, *obuf, *cbuf; | |
1557 | ||
1558 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); | |
1559 | ||
1560 | obuf = cbuf = xstrdup(buffer_ptr(conf)); | |
1561 | active = user ? 0 : 1; | |
1562 | linenum = 1; | |
1563 | while ((cp = strsep(&cbuf, "\n")) != NULL) { | |
1564 | if (process_server_config_line(options, cp, filename, | |
1565 | linenum++, &active, user, host, address) != 0) | |
1566 | bad_options++; | |
1567 | } | |
1568 | xfree(obuf); | |
1569 | if (bad_options > 0) | |
1570 | fatal("%s: terminating, %d bad configuration options", | |
1571 | filename, bad_options); | |
1572 | } | |
1573 | ||
1574 | static const char * | |
1575 | fmt_intarg(ServerOpCodes code, int val) | |
1576 | { | |
1577 | if (code == sAddressFamily) { | |
1578 | switch (val) { | |
1579 | case AF_INET: | |
1580 | return "inet"; | |
1581 | case AF_INET6: | |
1582 | return "inet6"; | |
1583 | case AF_UNSPEC: | |
1584 | return "any"; | |
1585 | default: | |
1586 | return "UNKNOWN"; | |
1587 | } | |
1588 | } | |
1589 | if (code == sPermitRootLogin) { | |
1590 | switch (val) { | |
1591 | case PERMIT_NO_PASSWD: | |
1592 | return "without-passord"; | |
1593 | case PERMIT_FORCED_ONLY: | |
1594 | return "forced-commands-only"; | |
1595 | case PERMIT_YES: | |
1596 | return "yes"; | |
1597 | } | |
1598 | } | |
1599 | if (code == sProtocol) { | |
1600 | switch (val) { | |
1601 | case SSH_PROTO_1: | |
1602 | return "1"; | |
1603 | case SSH_PROTO_2: | |
1604 | return "2"; | |
1605 | case (SSH_PROTO_1|SSH_PROTO_2): | |
1606 | return "2,1"; | |
1607 | default: | |
1608 | return "UNKNOWN"; | |
1609 | } | |
1610 | } | |
1611 | if (code == sGatewayPorts && val == 2) | |
1612 | return "clientspecified"; | |
1613 | if (code == sCompression && val == COMP_DELAYED) | |
1614 | return "delayed"; | |
1615 | switch (val) { | |
1616 | case -1: | |
1617 | return "unset"; | |
1618 | case 0: | |
1619 | return "no"; | |
1620 | case 1: | |
1621 | return "yes"; | |
1622 | } | |
1623 | return "UNKNOWN"; | |
1624 | } | |
1625 | ||
1626 | static const char * | |
1627 | lookup_opcode_name(ServerOpCodes code) | |
1628 | { | |
1629 | u_int i; | |
1630 | ||
1631 | for (i = 0; keywords[i].name != NULL; i++) | |
1632 | if (keywords[i].opcode == code) | |
1633 | return(keywords[i].name); | |
1634 | return "UNKNOWN"; | |
1635 | } | |
1636 | ||
1637 | static void | |
1638 | dump_cfg_int(ServerOpCodes code, int val) | |
1639 | { | |
1640 | printf("%s %d\n", lookup_opcode_name(code), val); | |
1641 | } | |
1642 | ||
1643 | static void | |
1644 | dump_cfg_fmtint(ServerOpCodes code, int val) | |
1645 | { | |
1646 | printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); | |
1647 | } | |
1648 | ||
1649 | static void | |
1650 | dump_cfg_string(ServerOpCodes code, const char *val) | |
1651 | { | |
1652 | if (val == NULL) | |
1653 | return; | |
1654 | printf("%s %s\n", lookup_opcode_name(code), val); | |
1655 | } | |
1656 | ||
1657 | static void | |
1658 | dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals) | |
1659 | { | |
1660 | u_int i; | |
1661 | ||
1662 | for (i = 0; i < count; i++) | |
1663 | printf("%s %s\n", lookup_opcode_name(code), vals[i]); | |
1664 | } | |
1665 | ||
1666 | void | |
1667 | dump_config(ServerOptions *o) | |
1668 | { | |
1669 | u_int i; | |
1670 | int ret; | |
1671 | struct addrinfo *ai; | |
1672 | char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL; | |
1673 | ||
1674 | /* these are usually at the top of the config */ | |
1675 | for (i = 0; i < o->num_ports; i++) | |
1676 | printf("port %d\n", o->ports[i]); | |
1677 | dump_cfg_fmtint(sProtocol, o->protocol); | |
1678 | dump_cfg_fmtint(sAddressFamily, o->address_family); | |
1679 | ||
1680 | /* ListenAddress must be after Port */ | |
1681 | for (ai = o->listen_addrs; ai; ai = ai->ai_next) { | |
1682 | if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, | |
1683 | sizeof(addr), port, sizeof(port), | |
1684 | NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { | |
1685 | error("getnameinfo failed: %.100s", | |
1686 | (ret != EAI_SYSTEM) ? gai_strerror(ret) : | |
1687 | strerror(errno)); | |
1688 | } else { | |
1689 | if (ai->ai_family == AF_INET6) | |
1690 | printf("listenaddress [%s]:%s\n", addr, port); | |
1691 | else | |
1692 | printf("listenaddress %s:%s\n", addr, port); | |
1693 | } | |
1694 | } | |
1695 | ||
1696 | /* integer arguments */ | |
1697 | dump_cfg_int(sServerKeyBits, o->server_key_bits); | |
1698 | dump_cfg_int(sLoginGraceTime, o->login_grace_time); | |
1699 | dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time); | |
1700 | dump_cfg_int(sX11DisplayOffset, o->x11_display_offset); | |
1701 | dump_cfg_int(sMaxAuthTries, o->max_authtries); | |
1702 | dump_cfg_int(sClientAliveInterval, o->client_alive_interval); | |
1703 | dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); | |
1704 | ||
1705 | /* formatted integer arguments */ | |
1706 | dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); | |
1707 | dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts); | |
1708 | dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts); | |
1709 | dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication); | |
1710 | dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication); | |
1711 | dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly, | |
1712 | o->hostbased_uses_name_from_packet_only); | |
1713 | dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication); | |
1714 | dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication); | |
1715 | dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication); | |
1716 | dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd); | |
1717 | dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup); | |
1718 | dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token); | |
1719 | dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); | |
1720 | dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); | |
1721 | dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); | |
1722 | dump_cfg_fmtint(sKbdInteractiveAuthentication, | |
1723 | o->kbd_interactive_authentication); | |
1724 | dump_cfg_fmtint(sChallengeResponseAuthentication, | |
1725 | o->challenge_response_authentication); | |
1726 | dump_cfg_fmtint(sPrintMotd, o->print_motd); | |
1727 | dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); | |
1728 | dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); | |
1729 | dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); | |
1730 | dump_cfg_fmtint(sStrictModes, o->strict_modes); | |
1731 | dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); | |
1732 | dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); | |
1733 | dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); | |
1734 | dump_cfg_fmtint(sUseLogin, o->use_login); | |
1735 | dump_cfg_fmtint(sCompression, o->compression); | |
1736 | dump_cfg_fmtint(sGatewayPorts, o->gateway_ports); | |
1737 | dump_cfg_fmtint(sUseDNS, o->use_dns); | |
1738 | dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); | |
1739 | dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep); | |
1740 | ||
1741 | /* string arguments */ | |
1742 | dump_cfg_string(sPidFile, o->pid_file); | |
1743 | dump_cfg_string(sXAuthLocation, o->xauth_location); | |
1744 | dump_cfg_string(sCiphers, o->ciphers); | |
1745 | dump_cfg_string(sMacs, o->macs); | |
1746 | dump_cfg_string(sBanner, o->banner); | |
1747 | dump_cfg_string(sAuthorizedKeysFile, o->authorized_keys_file); | |
1748 | dump_cfg_string(sAuthorizedKeysFile2, o->authorized_keys_file2); | |
1749 | dump_cfg_string(sForceCommand, o->adm_forced_command); | |
1750 | ||
1751 | /* string arguments requiring a lookup */ | |
1752 | dump_cfg_string(sLogLevel, log_level_name(o->log_level)); | |
1753 | dump_cfg_string(sLogFacility, log_facility_name(o->log_facility)); | |
1754 | ||
1755 | /* string array arguments */ | |
1756 | dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, | |
1757 | o->host_key_files); | |
1758 | dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); | |
1759 | dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); | |
1760 | dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); | |
1761 | dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); | |
1762 | dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); | |
1763 | ||
1764 | /* other arguments */ | |
1765 | for (i = 0; i < o->num_subsystems; i++) | |
1766 | printf("subsystem %s %s\n", o->subsystem_name[i], | |
1767 | o->subsystem_args[i]); | |
1768 | ||
1769 | printf("maxstartups %d:%d:%d\n", o->max_startups_begin, | |
1770 | o->max_startups_rate, o->max_startups); | |
1771 | ||
1772 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1773 | if (tunmode_desc[i].val == o->permit_tun) { | |
1774 | s = tunmode_desc[i].text; | |
1775 | break; | |
1776 | } | |
1777 | dump_cfg_string(sPermitTunnel, s); | |
1778 | ||
1779 | printf("permitopen"); | |
1780 | channel_print_adm_permitted_opens(); | |
1781 | printf("\n"); | |
1782 | } |