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91d9cdd3 | 1 | /* $OpenBSD: servconf.c,v 1.194 2009/01/22 10:02:34 djm Exp $ */ |
3c0ef626 | 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" | |
3c0ef626 | 14 | |
9108f8d9 | 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> | |
22616013 | 26 | #include <errno.h> |
9108f8d9 | 27 | |
22616013 | 28 | #include "openbsd-compat/sys-queue.h" |
9108f8d9 | 29 | #include "xmalloc.h" |
3c0ef626 | 30 | #include "ssh.h" |
31 | #include "log.h" | |
9108f8d9 | 32 | #include "buffer.h" |
3c0ef626 | 33 | #include "servconf.h" |
3c0ef626 | 34 | #include "compat.h" |
35 | #include "pathnames.h" | |
3c0ef626 | 36 | #include "misc.h" |
37 | #include "cipher.h" | |
9108f8d9 | 38 | #include "key.h" |
3c0ef626 | 39 | #include "kex.h" |
40 | #include "mac.h" | |
9108f8d9 | 41 | #include "match.h" |
42 | #include "channels.h" | |
43 | #include "groupaccess.h" | |
3c0ef626 | 44 | |
91d9cdd3 | 45 | static void add_listen_addr(ServerOptions *, char *, int); |
46 | static void add_one_listen_addr(ServerOptions *, char *, int); | |
3c0ef626 | 47 | |
700318f3 | 48 | /* Use of privilege separation or not */ |
49 | extern int use_privsep; | |
9108f8d9 | 50 | extern Buffer cfg; |
3c0ef626 | 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 */ | |
0fff78ff | 60 | options->use_pam = -1; |
3c0ef626 | 61 | |
62 | /* Standard Options */ | |
63 | options->num_ports = 0; | |
64 | options->ports_from_cmdline = 0; | |
65 | options->listen_addrs = NULL; | |
996d5e62 | 66 | options->address_family = -1; |
3c0ef626 | 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; | |
e9a17296 | 79 | options->x11_use_localhost = -1; |
3c0ef626 | 80 | options->xauth_location = NULL; |
81 | options->strict_modes = -1; | |
cdd66111 | 82 | options->tcp_keep_alive = -1; |
e9a17296 | 83 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
84 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
3c0ef626 | 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; | |
3c0ef626 | 90 | options->kerberos_authentication = -1; |
91 | options->kerberos_or_local_passwd = -1; | |
92 | options->kerberos_ticket_cleanup = -1; | |
cdd66111 | 93 | options->kerberos_get_afs_token = -1; |
0fff78ff | 94 | options->gss_authentication=-1; |
f97edba6 | 95 | options->gss_keyex = -1; |
0fff78ff | 96 | options->gss_cleanup_creds = -1; |
f97edba6 | 97 | options->gss_strict_acceptor = -1; |
98 | options->gss_store_rekey = -1; | |
3c0ef626 | 99 | options->password_authentication = -1; |
100 | options->kbd_interactive_authentication = -1; | |
101 | options->challenge_response_authentication = -1; | |
102 | options->permit_empty_passwd = -1; | |
41b2f314 | 103 | options->permit_user_env = -1; |
3c0ef626 | 104 | options->use_login = -1; |
f5799ae1 | 105 | options->compression = -1; |
3c0ef626 | 106 | options->allow_tcp_forwarding = -1; |
22616013 | 107 | options->allow_agent_forwarding = -1; |
3c0ef626 | 108 | options->num_allow_users = 0; |
109 | options->num_deny_users = 0; | |
110 | options->num_allow_groups = 0; | |
111 | options->num_deny_groups = 0; | |
112 | options->ciphers = NULL; | |
113 | options->macs = NULL; | |
114 | options->protocol = SSH_PROTO_UNKNOWN; | |
115 | options->gateway_ports = -1; | |
116 | options->num_subsystems = 0; | |
117 | options->max_startups_begin = -1; | |
118 | options->max_startups_rate = -1; | |
119 | options->max_startups = -1; | |
c9f39d2c | 120 | options->max_authtries = -1; |
22616013 | 121 | options->max_sessions = -1; |
3c0ef626 | 122 | options->banner = NULL; |
0fff78ff | 123 | options->use_dns = -1; |
3c0ef626 | 124 | options->client_alive_interval = -1; |
125 | options->client_alive_count_max = -1; | |
126 | options->authorized_keys_file = NULL; | |
127 | options->authorized_keys_file2 = NULL; | |
c9f39d2c | 128 | options->num_accept_env = 0; |
2c06c99b | 129 | options->permit_tun = -1; |
9108f8d9 | 130 | options->num_permitted_opens = -1; |
131 | options->adm_forced_command = NULL; | |
47686178 | 132 | options->chroot_directory = NULL; |
91d9cdd3 | 133 | options->zero_knowledge_password_authentication = -1; |
76d45d2f | 134 | options->none_enabled = -1; |
135 | options->tcp_rcv_buf_poll = -1; | |
136 | options->hpn_disabled = -1; | |
137 | options->hpn_buffer_size = -1; | |
3c0ef626 | 138 | } |
139 | ||
140 | void | |
141 | fill_default_server_options(ServerOptions *options) | |
142 | { | |
76d45d2f | 143 | /* needed for hpn socket tests */ |
144 | int sock; | |
145 | int socksize; | |
146 | int socksizelen = sizeof(int); | |
147 | ||
3c0ef626 | 148 | /* Portable-specific options */ |
0fff78ff | 149 | if (options->use_pam == -1) |
acc3d05e | 150 | options->use_pam = 0; |
3c0ef626 | 151 | |
152 | /* Standard Options */ | |
153 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
154 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
155 | if (options->num_host_key_files == 0) { | |
156 | /* fill default hostkeys for protocols */ | |
157 | if (options->protocol & SSH_PROTO_1) | |
e9a17296 | 158 | options->host_key_files[options->num_host_key_files++] = |
159 | _PATH_HOST_KEY_FILE; | |
160 | if (options->protocol & SSH_PROTO_2) { | |
161 | options->host_key_files[options->num_host_key_files++] = | |
162 | _PATH_HOST_RSA_KEY_FILE; | |
163 | options->host_key_files[options->num_host_key_files++] = | |
164 | _PATH_HOST_DSA_KEY_FILE; | |
165 | } | |
3c0ef626 | 166 | } |
167 | if (options->num_ports == 0) | |
168 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
169 | if (options->listen_addrs == NULL) | |
170 | add_listen_addr(options, NULL, 0); | |
171 | if (options->pid_file == NULL) | |
172 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; | |
173 | if (options->server_key_bits == -1) | |
22616013 | 174 | options->server_key_bits = 1024; |
3c0ef626 | 175 | if (options->login_grace_time == -1) |
41b2f314 | 176 | options->login_grace_time = 120; |
3c0ef626 | 177 | if (options->key_regeneration_time == -1) |
178 | options->key_regeneration_time = 3600; | |
179 | if (options->permit_root_login == PERMIT_NOT_SET) | |
180 | options->permit_root_login = PERMIT_YES; | |
181 | if (options->ignore_rhosts == -1) | |
182 | options->ignore_rhosts = 1; | |
183 | if (options->ignore_user_known_hosts == -1) | |
184 | options->ignore_user_known_hosts = 0; | |
185 | if (options->print_motd == -1) | |
186 | options->print_motd = 1; | |
187 | if (options->print_lastlog == -1) | |
188 | options->print_lastlog = 1; | |
189 | if (options->x11_forwarding == -1) | |
190 | options->x11_forwarding = 0; | |
191 | if (options->x11_display_offset == -1) | |
192 | options->x11_display_offset = 10; | |
e9a17296 | 193 | if (options->x11_use_localhost == -1) |
194 | options->x11_use_localhost = 1; | |
3c0ef626 | 195 | if (options->xauth_location == NULL) |
196 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 197 | if (options->strict_modes == -1) |
198 | options->strict_modes = 1; | |
cdd66111 | 199 | if (options->tcp_keep_alive == -1) |
200 | options->tcp_keep_alive = 1; | |
e9a17296 | 201 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
3c0ef626 | 202 | options->log_facility = SYSLOG_FACILITY_AUTH; |
e9a17296 | 203 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 204 | options->log_level = SYSLOG_LEVEL_INFO; |
3c0ef626 | 205 | if (options->rhosts_rsa_authentication == -1) |
206 | options->rhosts_rsa_authentication = 0; | |
207 | if (options->hostbased_authentication == -1) | |
208 | options->hostbased_authentication = 0; | |
209 | if (options->hostbased_uses_name_from_packet_only == -1) | |
210 | options->hostbased_uses_name_from_packet_only = 0; | |
211 | if (options->rsa_authentication == -1) | |
212 | options->rsa_authentication = 1; | |
213 | if (options->pubkey_authentication == -1) | |
214 | options->pubkey_authentication = 1; | |
3c0ef626 | 215 | if (options->kerberos_authentication == -1) |
700318f3 | 216 | options->kerberos_authentication = 0; |
3c0ef626 | 217 | if (options->kerberos_or_local_passwd == -1) |
218 | options->kerberos_or_local_passwd = 1; | |
219 | if (options->kerberos_ticket_cleanup == -1) | |
220 | options->kerberos_ticket_cleanup = 1; | |
cdd66111 | 221 | if (options->kerberos_get_afs_token == -1) |
222 | options->kerberos_get_afs_token = 0; | |
0fff78ff | 223 | if (options->gss_authentication == -1) |
224 | options->gss_authentication = 0; | |
f97edba6 | 225 | if (options->gss_keyex == -1) |
226 | options->gss_keyex = 0; | |
0fff78ff | 227 | if (options->gss_cleanup_creds == -1) |
228 | options->gss_cleanup_creds = 1; | |
f97edba6 | 229 | if (options->gss_strict_acceptor == -1) |
230 | options->gss_strict_acceptor = 1; | |
231 | if (options->gss_store_rekey == -1) | |
232 | options->gss_store_rekey = 0; | |
3c0ef626 | 233 | if (options->password_authentication == -1) |
234 | options->password_authentication = 1; | |
235 | if (options->kbd_interactive_authentication == -1) | |
236 | options->kbd_interactive_authentication = 0; | |
237 | if (options->challenge_response_authentication == -1) | |
238 | options->challenge_response_authentication = 1; | |
239 | if (options->permit_empty_passwd == -1) | |
240 | options->permit_empty_passwd = 0; | |
41b2f314 | 241 | if (options->permit_user_env == -1) |
242 | options->permit_user_env = 0; | |
3c0ef626 | 243 | if (options->use_login == -1) |
244 | options->use_login = 0; | |
f5799ae1 | 245 | if (options->compression == -1) |
665a873d | 246 | options->compression = COMP_DELAYED; |
3c0ef626 | 247 | if (options->allow_tcp_forwarding == -1) |
248 | options->allow_tcp_forwarding = 1; | |
22616013 | 249 | if (options->allow_agent_forwarding == -1) |
250 | options->allow_agent_forwarding = 1; | |
3c0ef626 | 251 | if (options->gateway_ports == -1) |
252 | options->gateway_ports = 0; | |
253 | if (options->max_startups == -1) | |
254 | options->max_startups = 10; | |
255 | if (options->max_startups_rate == -1) | |
256 | options->max_startups_rate = 100; /* 100% */ | |
257 | if (options->max_startups_begin == -1) | |
258 | options->max_startups_begin = options->max_startups; | |
c9f39d2c | 259 | if (options->max_authtries == -1) |
260 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; | |
22616013 | 261 | if (options->max_sessions == -1) |
262 | options->max_sessions = DEFAULT_SESSIONS_MAX; | |
0fff78ff | 263 | if (options->use_dns == -1) |
264 | options->use_dns = 1; | |
3c0ef626 | 265 | if (options->client_alive_interval == -1) |
e9a17296 | 266 | options->client_alive_interval = 0; |
3c0ef626 | 267 | if (options->client_alive_count_max == -1) |
268 | options->client_alive_count_max = 3; | |
269 | if (options->authorized_keys_file2 == NULL) { | |
270 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
271 | if (options->authorized_keys_file != NULL) | |
272 | options->authorized_keys_file2 = options->authorized_keys_file; | |
273 | else | |
274 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
275 | } | |
276 | if (options->authorized_keys_file == NULL) | |
277 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
2c06c99b | 278 | if (options->permit_tun == -1) |
279 | options->permit_tun = SSH_TUNMODE_NO; | |
91d9cdd3 | 280 | if (options->zero_knowledge_password_authentication == -1) |
281 | options->zero_knowledge_password_authentication = 0; | |
700318f3 | 282 | |
76d45d2f | 283 | if (options->hpn_disabled == -1) |
284 | options->hpn_disabled = 0; | |
285 | ||
286 | if (options->hpn_buffer_size == -1) { | |
287 | /* option not explicitly set. Now we have to figure out */ | |
288 | /* what value to use */ | |
289 | if (options->hpn_disabled == 1) { | |
290 | options->hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT; | |
291 | } else { | |
292 | /* get the current RCV size and set it to that */ | |
293 | /*create a socket but don't connect it */ | |
294 | /* we use that the get the rcv socket size */ | |
295 | sock = socket(AF_INET, SOCK_STREAM, 0); | |
296 | getsockopt(sock, SOL_SOCKET, SO_RCVBUF, | |
297 | &socksize, &socksizelen); | |
298 | close(sock); | |
299 | options->hpn_buffer_size = socksize; | |
300 | debug ("HPN Buffer Size: %d", options->hpn_buffer_size); | |
301 | ||
302 | } | |
303 | } else { | |
304 | /* we have to do this incase the user sets both values in a contradictory */ | |
305 | /* manner. hpn_disabled overrrides hpn_buffer_size*/ | |
306 | if (options->hpn_disabled <= 0) { | |
307 | if (options->hpn_buffer_size == 0) | |
308 | options->hpn_buffer_size = 1; | |
309 | /* limit the maximum buffer to 64MB */ | |
310 | if (options->hpn_buffer_size > 64*1024) { | |
311 | options->hpn_buffer_size = 64*1024*1024; | |
312 | } else { | |
313 | options->hpn_buffer_size *= 1024; | |
314 | } | |
315 | } else | |
316 | options->hpn_buffer_size = CHAN_TCP_WINDOW_DEFAULT; | |
317 | } | |
318 | ||
f5799ae1 | 319 | /* Turn privilege separation on by default */ |
700318f3 | 320 | if (use_privsep == -1) |
f5799ae1 | 321 | use_privsep = 1; |
322 | ||
41b2f314 | 323 | #ifndef HAVE_MMAP |
f5799ae1 | 324 | if (use_privsep && options->compression == 1) { |
325 | error("This platform does not support both privilege " | |
326 | "separation and compression"); | |
327 | error("Compression disabled"); | |
328 | options->compression = 0; | |
329 | } | |
330 | #endif | |
331 | ||
3c0ef626 | 332 | } |
333 | ||
334 | /* Keyword tokens. */ | |
335 | typedef enum { | |
336 | sBadOption, /* == unknown option */ | |
337 | /* Portable-specific options */ | |
0fff78ff | 338 | sUsePAM, |
3c0ef626 | 339 | /* Standard Options */ |
340 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
341 | sPermitRootLogin, sLogFacility, sLogLevel, | |
0fff78ff | 342 | sRhostsRSAAuthentication, sRSAAuthentication, |
3c0ef626 | 343 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
cdd66111 | 344 | sKerberosGetAFSToken, |
0fff78ff | 345 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
996d5e62 | 346 | sPasswordAuthentication, sKbdInteractiveAuthentication, |
347 | sListenAddress, sAddressFamily, | |
3c0ef626 | 348 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e9a17296 | 349 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
cdd66111 | 350 | sStrictModes, sEmptyPasswd, sTCPKeepAlive, |
41b2f314 | 351 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
3c0ef626 | 352 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
353 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, | |
c9f39d2c | 354 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, |
22616013 | 355 | sMaxStartups, sMaxAuthTries, sMaxSessions, |
0fff78ff | 356 | sBanner, sUseDNS, sHostbasedAuthentication, |
e9a17296 | 357 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
3c0ef626 | 358 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
f97edba6 | 359 | sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor, |
360 | sGssKeyEx, sGssStoreRekey, | |
361 | sAcceptEnv, sPermitTunnel, | |
47686178 | 362 | sMatch, sPermitOpen, sForceCommand, sChrootDirectory, |
22616013 | 363 | sUsePrivilegeSeparation, sAllowAgentForwarding, |
91d9cdd3 | 364 | sZeroKnowledgePasswordAuthentication, |
76d45d2f | 365 | sNoneEnabled, sTcpRcvBufPoll, sHPNDisabled, sHPNBufferSize, |
0fff78ff | 366 | sDeprecated, sUnsupported |
3c0ef626 | 367 | } ServerOpCodes; |
368 | ||
9108f8d9 | 369 | #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */ |
370 | #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */ | |
371 | #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH) | |
372 | ||
3c0ef626 | 373 | /* Textual representation of the tokens. */ |
374 | static struct { | |
375 | const char *name; | |
376 | ServerOpCodes opcode; | |
9108f8d9 | 377 | u_int flags; |
3c0ef626 | 378 | } keywords[] = { |
379 | /* Portable-specific options */ | |
0fff78ff | 380 | #ifdef USE_PAM |
9108f8d9 | 381 | { "usepam", sUsePAM, SSHCFG_GLOBAL }, |
0fff78ff | 382 | #else |
9108f8d9 | 383 | { "usepam", sUnsupported, SSHCFG_GLOBAL }, |
0fff78ff | 384 | #endif |
9108f8d9 | 385 | { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL }, |
3c0ef626 | 386 | /* Standard Options */ |
9108f8d9 | 387 | { "port", sPort, SSHCFG_GLOBAL }, |
388 | { "hostkey", sHostKeyFile, SSHCFG_GLOBAL }, | |
389 | { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */ | |
390 | { "pidfile", sPidFile, SSHCFG_GLOBAL }, | |
391 | { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL }, | |
392 | { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL }, | |
393 | { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL }, | |
47686178 | 394 | { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL }, |
9108f8d9 | 395 | { "syslogfacility", sLogFacility, SSHCFG_GLOBAL }, |
396 | { "loglevel", sLogLevel, SSHCFG_GLOBAL }, | |
397 | { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL }, | |
799ae497 | 398 | { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, |
399 | { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, | |
9108f8d9 | 400 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL }, |
799ae497 | 401 | { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, |
402 | { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, | |
9108f8d9 | 403 | { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ |
0fff78ff | 404 | #ifdef KRB5 |
799ae497 | 405 | { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, |
9108f8d9 | 406 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, |
407 | { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, | |
cdd66111 | 408 | #ifdef USE_AFS |
9108f8d9 | 409 | { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, |
cdd66111 | 410 | #else |
9108f8d9 | 411 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, |
cdd66111 | 412 | #endif |
0fff78ff | 413 | #else |
799ae497 | 414 | { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, |
9108f8d9 | 415 | { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, |
416 | { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, | |
417 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, | |
3c0ef626 | 418 | #endif |
9108f8d9 | 419 | { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, |
420 | { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, | |
0fff78ff | 421 | #ifdef GSSAPI |
799ae497 | 422 | { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, |
9108f8d9 | 423 | { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, |
f97edba6 | 424 | { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL }, |
425 | { "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL }, | |
426 | { "gssapistorecredentialsonrekey", sGssStoreRekey, SSHCFG_GLOBAL }, | |
0fff78ff | 427 | #else |
799ae497 | 428 | { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, |
9108f8d9 | 429 | { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, |
f97edba6 | 430 | { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL }, |
431 | { "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL }, | |
432 | { "gssapistorecredentialsonrekey", sUnsupported, SSHCFG_GLOBAL }, | |
3c0ef626 | 433 | #endif |
799ae497 | 434 | { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, |
435 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, | |
9108f8d9 | 436 | { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, |
437 | { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */ | |
91d9cdd3 | 438 | #ifdef JPAKE |
439 | { "zeroknowledgepasswordauthentication", sZeroKnowledgePasswordAuthentication, SSHCFG_ALL }, | |
440 | #else | |
441 | { "zeroknowledgepasswordauthentication", sUnsupported, SSHCFG_ALL }, | |
442 | #endif | |
9108f8d9 | 443 | { "checkmail", sDeprecated, SSHCFG_GLOBAL }, |
444 | { "listenaddress", sListenAddress, SSHCFG_GLOBAL }, | |
445 | { "addressfamily", sAddressFamily, SSHCFG_GLOBAL }, | |
446 | { "printmotd", sPrintMotd, SSHCFG_GLOBAL }, | |
447 | { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL }, | |
448 | { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL }, | |
449 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL }, | |
450 | { "x11forwarding", sX11Forwarding, SSHCFG_ALL }, | |
451 | { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL }, | |
452 | { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL }, | |
453 | { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL }, | |
454 | { "strictmodes", sStrictModes, SSHCFG_GLOBAL }, | |
91d9cdd3 | 455 | { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL }, |
9108f8d9 | 456 | { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL }, |
457 | { "uselogin", sUseLogin, SSHCFG_GLOBAL }, | |
458 | { "compression", sCompression, SSHCFG_GLOBAL }, | |
459 | { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, | |
460 | { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */ | |
461 | { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL }, | |
22616013 | 462 | { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL }, |
9108f8d9 | 463 | { "allowusers", sAllowUsers, SSHCFG_GLOBAL }, |
464 | { "denyusers", sDenyUsers, SSHCFG_GLOBAL }, | |
465 | { "allowgroups", sAllowGroups, SSHCFG_GLOBAL }, | |
466 | { "denygroups", sDenyGroups, SSHCFG_GLOBAL }, | |
467 | { "ciphers", sCiphers, SSHCFG_GLOBAL }, | |
468 | { "macs", sMacs, SSHCFG_GLOBAL }, | |
469 | { "protocol", sProtocol, SSHCFG_GLOBAL }, | |
470 | { "gatewayports", sGatewayPorts, SSHCFG_ALL }, | |
471 | { "subsystem", sSubsystem, SSHCFG_GLOBAL }, | |
472 | { "maxstartups", sMaxStartups, SSHCFG_GLOBAL }, | |
22616013 | 473 | { "maxauthtries", sMaxAuthTries, SSHCFG_ALL }, |
474 | { "maxsessions", sMaxSessions, SSHCFG_ALL }, | |
799ae497 | 475 | { "banner", sBanner, SSHCFG_ALL }, |
9108f8d9 | 476 | { "usedns", sUseDNS, SSHCFG_GLOBAL }, |
477 | { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL }, | |
478 | { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL }, | |
479 | { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL }, | |
480 | { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL }, | |
481 | { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL }, | |
482 | { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL }, | |
483 | { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL }, | |
484 | { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL }, | |
485 | { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL }, | |
486 | { "match", sMatch, SSHCFG_ALL }, | |
487 | { "permitopen", sPermitOpen, SSHCFG_ALL }, | |
488 | { "forcecommand", sForceCommand, SSHCFG_ALL }, | |
47686178 | 489 | { "chrootdirectory", sChrootDirectory, SSHCFG_ALL }, |
76d45d2f | 490 | { "noneenabled", sNoneEnabled }, |
491 | { "hpndisabled", sHPNDisabled }, | |
492 | { "hpnbuffersize", sHPNBufferSize }, | |
493 | { "tcprcvbufpoll", sTcpRcvBufPoll }, | |
9108f8d9 | 494 | { NULL, sBadOption, 0 } |
3c0ef626 | 495 | }; |
496 | ||
22616013 | 497 | static struct { |
498 | int val; | |
499 | char *text; | |
500 | } tunmode_desc[] = { | |
501 | { SSH_TUNMODE_NO, "no" }, | |
502 | { SSH_TUNMODE_POINTOPOINT, "point-to-point" }, | |
503 | { SSH_TUNMODE_ETHERNET, "ethernet" }, | |
504 | { SSH_TUNMODE_YES, "yes" }, | |
505 | { -1, NULL } | |
506 | }; | |
507 | ||
3c0ef626 | 508 | /* |
509 | * Returns the number of the token pointed to by cp or sBadOption. | |
510 | */ | |
511 | ||
512 | static ServerOpCodes | |
513 | parse_token(const char *cp, const char *filename, | |
9108f8d9 | 514 | int linenum, u_int *flags) |
3c0ef626 | 515 | { |
516 | u_int i; | |
517 | ||
518 | for (i = 0; keywords[i].name; i++) | |
9108f8d9 | 519 | if (strcasecmp(cp, keywords[i].name) == 0) { |
76d45d2f | 520 | debug ("Config token is %s", keywords[i].name); |
9108f8d9 | 521 | *flags = keywords[i].flags; |
3c0ef626 | 522 | return keywords[i].opcode; |
9108f8d9 | 523 | } |
3c0ef626 | 524 | |
525 | error("%s: line %d: Bad configuration option: %s", | |
526 | filename, linenum, cp); | |
527 | return sBadOption; | |
528 | } | |
529 | ||
530 | static void | |
91d9cdd3 | 531 | add_listen_addr(ServerOptions *options, char *addr, int port) |
3c0ef626 | 532 | { |
665a873d | 533 | u_int i; |
3c0ef626 | 534 | |
535 | if (options->num_ports == 0) | |
536 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
996d5e62 | 537 | if (options->address_family == -1) |
538 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 539 | if (port == 0) |
540 | for (i = 0; i < options->num_ports; i++) | |
541 | add_one_listen_addr(options, addr, options->ports[i]); | |
542 | else | |
543 | add_one_listen_addr(options, addr, port); | |
544 | } | |
545 | ||
546 | static void | |
91d9cdd3 | 547 | add_one_listen_addr(ServerOptions *options, char *addr, int port) |
3c0ef626 | 548 | { |
549 | struct addrinfo hints, *ai, *aitop; | |
550 | char strport[NI_MAXSERV]; | |
551 | int gaierr; | |
552 | ||
553 | memset(&hints, 0, sizeof(hints)); | |
996d5e62 | 554 | hints.ai_family = options->address_family; |
3c0ef626 | 555 | hints.ai_socktype = SOCK_STREAM; |
556 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
91d9cdd3 | 557 | snprintf(strport, sizeof strport, "%d", port); |
3c0ef626 | 558 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
559 | fatal("bad addr or host: %s (%s)", | |
560 | addr ? addr : "<NULL>", | |
47686178 | 561 | ssh_gai_strerror(gaierr)); |
3c0ef626 | 562 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
563 | ; | |
564 | ai->ai_next = options->listen_addrs; | |
565 | options->listen_addrs = aitop; | |
566 | } | |
567 | ||
9108f8d9 | 568 | /* |
569 | * The strategy for the Match blocks is that the config file is parsed twice. | |
570 | * | |
571 | * The first time is at startup. activep is initialized to 1 and the | |
572 | * directives in the global context are processed and acted on. Hitting a | |
573 | * Match directive unsets activep and the directives inside the block are | |
574 | * checked for syntax only. | |
575 | * | |
576 | * The second time is after a connection has been established but before | |
577 | * authentication. activep is initialized to 2 and global config directives | |
578 | * are ignored since they have already been processed. If the criteria in a | |
579 | * Match block is met, activep is set and the subsequent directives | |
580 | * processed and actioned until EOF or another Match block unsets it. Any | |
581 | * options set are copied into the main server config. | |
582 | * | |
583 | * Potential additions/improvements: | |
584 | * - Add Match support for pre-kex directives, eg Protocol, Ciphers. | |
585 | * | |
586 | * - Add a Tag directive (idea from David Leonard) ala pf, eg: | |
587 | * Match Address 192.168.0.* | |
588 | * Tag trusted | |
589 | * Match Group wheel | |
590 | * Tag trusted | |
591 | * Match Tag trusted | |
592 | * AllowTcpForwarding yes | |
593 | * GatewayPorts clientspecified | |
594 | * [...] | |
595 | * | |
596 | * - Add a PermittedChannelRequests directive | |
597 | * Match Group shell | |
598 | * PermittedChannelRequests session,forwarded-tcpip | |
599 | */ | |
600 | ||
601 | static int | |
602 | match_cfg_line_group(const char *grps, int line, const char *user) | |
603 | { | |
604 | int result = 0; | |
9108f8d9 | 605 | struct passwd *pw; |
606 | ||
9108f8d9 | 607 | if (user == NULL) |
608 | goto out; | |
609 | ||
610 | if ((pw = getpwnam(user)) == NULL) { | |
611 | debug("Can't match group at line %d because user %.100s does " | |
612 | "not exist", line, user); | |
613 | } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) { | |
614 | debug("Can't Match group because user %.100s not in any group " | |
615 | "at line %d", user, line); | |
22616013 | 616 | } else if (ga_match_pattern_list(grps) != 1) { |
617 | debug("user %.100s does not match group list %.100s at line %d", | |
618 | user, grps, line); | |
9108f8d9 | 619 | } else { |
22616013 | 620 | debug("user %.100s matched group list %.100s at line %d", user, |
621 | grps, line); | |
9108f8d9 | 622 | result = 1; |
623 | } | |
624 | out: | |
625 | ga_free(); | |
9108f8d9 | 626 | return result; |
627 | } | |
628 | ||
629 | static int | |
630 | match_cfg_line(char **condition, int line, const char *user, const char *host, | |
631 | const char *address) | |
632 | { | |
633 | int result = 1; | |
634 | char *arg, *attrib, *cp = *condition; | |
635 | size_t len; | |
636 | ||
637 | if (user == NULL) | |
638 | debug3("checking syntax for 'Match %s'", cp); | |
639 | else | |
640 | debug3("checking match for '%s' user %s host %s addr %s", cp, | |
641 | user ? user : "(null)", host ? host : "(null)", | |
642 | address ? address : "(null)"); | |
643 | ||
644 | while ((attrib = strdelim(&cp)) && *attrib != '\0') { | |
645 | if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { | |
646 | error("Missing Match criteria for %s", attrib); | |
647 | return -1; | |
648 | } | |
649 | len = strlen(arg); | |
650 | if (strcasecmp(attrib, "user") == 0) { | |
651 | if (!user) { | |
652 | result = 0; | |
653 | continue; | |
654 | } | |
655 | if (match_pattern_list(user, arg, len, 0) != 1) | |
656 | result = 0; | |
657 | else | |
658 | debug("user %.100s matched 'User %.100s' at " | |
659 | "line %d", user, arg, line); | |
660 | } else if (strcasecmp(attrib, "group") == 0) { | |
661 | switch (match_cfg_line_group(arg, line, user)) { | |
662 | case -1: | |
663 | return -1; | |
664 | case 0: | |
665 | result = 0; | |
666 | } | |
667 | } else if (strcasecmp(attrib, "host") == 0) { | |
668 | if (!host) { | |
669 | result = 0; | |
670 | continue; | |
671 | } | |
672 | if (match_hostname(host, arg, len) != 1) | |
673 | result = 0; | |
674 | else | |
675 | debug("connection from %.100s matched 'Host " | |
676 | "%.100s' at line %d", host, arg, line); | |
677 | } else if (strcasecmp(attrib, "address") == 0) { | |
22616013 | 678 | switch (addr_match_list(address, arg)) { |
679 | case 1: | |
9108f8d9 | 680 | debug("connection from %.100s matched 'Address " |
681 | "%.100s' at line %d", address, arg, line); | |
22616013 | 682 | break; |
683 | case 0: | |
684 | case -1: | |
685 | result = 0; | |
686 | break; | |
687 | case -2: | |
688 | return -1; | |
689 | } | |
9108f8d9 | 690 | } else { |
691 | error("Unsupported Match attribute %s", attrib); | |
692 | return -1; | |
693 | } | |
694 | } | |
695 | if (user != NULL) | |
696 | debug3("match %sfound", result ? "" : "not "); | |
697 | *condition = cp; | |
698 | return result; | |
699 | } | |
700 | ||
701 | #define WHITESPACE " \t\r\n" | |
702 | ||
e9a17296 | 703 | int |
704 | process_server_config_line(ServerOptions *options, char *line, | |
9108f8d9 | 705 | const char *filename, int linenum, int *activep, const char *user, |
706 | const char *host, const char *address) | |
3c0ef626 | 707 | { |
3c0ef626 | 708 | char *cp, **charptr, *arg, *p; |
9108f8d9 | 709 | int cmdline = 0, *intptr, value, n; |
47686178 | 710 | SyslogFacility *log_facility_ptr; |
711 | LogLevel *log_level_ptr; | |
3c0ef626 | 712 | ServerOpCodes opcode; |
91d9cdd3 | 713 | int port; |
9108f8d9 | 714 | u_int i, flags = 0; |
715 | size_t len; | |
3c0ef626 | 716 | |
e9a17296 | 717 | cp = line; |
9108f8d9 | 718 | if ((arg = strdelim(&cp)) == NULL) |
719 | return 0; | |
e9a17296 | 720 | /* Ignore leading whitespace */ |
721 | if (*arg == '\0') | |
3c0ef626 | 722 | arg = strdelim(&cp); |
e9a17296 | 723 | if (!arg || !*arg || *arg == '#') |
724 | return 0; | |
725 | intptr = NULL; | |
726 | charptr = NULL; | |
9108f8d9 | 727 | opcode = parse_token(arg, filename, linenum, &flags); |
728 | ||
729 | if (activep == NULL) { /* We are processing a command line directive */ | |
730 | cmdline = 1; | |
731 | activep = &cmdline; | |
732 | } | |
733 | if (*activep && opcode != sMatch) | |
734 | debug3("%s:%d setting %s %s", filename, linenum, arg, cp); | |
735 | if (*activep == 0 && !(flags & SSHCFG_MATCH)) { | |
736 | if (user == NULL) { | |
737 | fatal("%s line %d: Directive '%s' is not allowed " | |
738 | "within a Match block", filename, linenum, arg); | |
739 | } else { /* this is a directive we have already processed */ | |
740 | while (arg) | |
741 | arg = strdelim(&cp); | |
742 | return 0; | |
743 | } | |
744 | } | |
745 | ||
e9a17296 | 746 | switch (opcode) { |
747 | /* Portable-specific options */ | |
0fff78ff | 748 | case sUsePAM: |
749 | intptr = &options->use_pam; | |
e9a17296 | 750 | goto parse_flag; |
3c0ef626 | 751 | |
e9a17296 | 752 | /* Standard Options */ |
753 | case sBadOption: | |
754 | return -1; | |
755 | case sPort: | |
756 | /* ignore ports from configfile if cmdline specifies ports */ | |
757 | if (options->ports_from_cmdline) | |
758 | return 0; | |
759 | if (options->listen_addrs != NULL) | |
760 | fatal("%s line %d: ports must be specified before " | |
761 | "ListenAddress.", filename, linenum); | |
762 | if (options->num_ports >= MAX_PORTS) | |
763 | fatal("%s line %d: too many ports.", | |
764 | filename, linenum); | |
765 | arg = strdelim(&cp); | |
766 | if (!arg || *arg == '\0') | |
767 | fatal("%s line %d: missing port number.", | |
768 | filename, linenum); | |
769 | options->ports[options->num_ports++] = a2port(arg); | |
91d9cdd3 | 770 | if (options->ports[options->num_ports-1] <= 0) |
e9a17296 | 771 | fatal("%s line %d: Badly formatted port number.", |
772 | filename, linenum); | |
773 | break; | |
774 | ||
775 | case sServerKeyBits: | |
776 | intptr = &options->server_key_bits; | |
22616013 | 777 | parse_int: |
e9a17296 | 778 | arg = strdelim(&cp); |
779 | if (!arg || *arg == '\0') | |
780 | fatal("%s line %d: missing integer value.", | |
781 | filename, linenum); | |
782 | value = atoi(arg); | |
9108f8d9 | 783 | if (*activep && *intptr == -1) |
e9a17296 | 784 | *intptr = value; |
785 | break; | |
786 | ||
787 | case sLoginGraceTime: | |
788 | intptr = &options->login_grace_time; | |
22616013 | 789 | parse_time: |
e9a17296 | 790 | arg = strdelim(&cp); |
791 | if (!arg || *arg == '\0') | |
792 | fatal("%s line %d: missing time value.", | |
793 | filename, linenum); | |
794 | if ((value = convtime(arg)) == -1) | |
795 | fatal("%s line %d: invalid time value.", | |
796 | filename, linenum); | |
797 | if (*intptr == -1) | |
798 | *intptr = value; | |
799 | break; | |
800 | ||
801 | case sKeyRegenerationTime: | |
802 | intptr = &options->key_regeneration_time; | |
803 | goto parse_time; | |
804 | ||
805 | case sListenAddress: | |
806 | arg = strdelim(&cp); | |
996d5e62 | 807 | if (arg == NULL || *arg == '\0') |
808 | fatal("%s line %d: missing address", | |
e9a17296 | 809 | filename, linenum); |
665a873d | 810 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ |
811 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL | |
812 | && strchr(p+1, ':') != NULL) { | |
813 | add_listen_addr(options, arg, 0); | |
814 | break; | |
815 | } | |
996d5e62 | 816 | p = hpdelim(&arg); |
817 | if (p == NULL) | |
818 | fatal("%s line %d: bad address:port usage", | |
e9a17296 | 819 | filename, linenum); |
996d5e62 | 820 | p = cleanhostname(p); |
821 | if (arg == NULL) | |
822 | port = 0; | |
91d9cdd3 | 823 | else if ((port = a2port(arg)) <= 0) |
996d5e62 | 824 | fatal("%s line %d: bad port number", filename, linenum); |
825 | ||
826 | add_listen_addr(options, p, port); | |
827 | ||
828 | break; | |
829 | ||
830 | case sAddressFamily: | |
831 | arg = strdelim(&cp); | |
665a873d | 832 | if (!arg || *arg == '\0') |
833 | fatal("%s line %d: missing address family.", | |
834 | filename, linenum); | |
996d5e62 | 835 | intptr = &options->address_family; |
836 | if (options->listen_addrs != NULL) | |
837 | fatal("%s line %d: address family must be specified before " | |
838 | "ListenAddress.", filename, linenum); | |
839 | if (strcasecmp(arg, "inet") == 0) | |
840 | value = AF_INET; | |
841 | else if (strcasecmp(arg, "inet6") == 0) | |
842 | value = AF_INET6; | |
843 | else if (strcasecmp(arg, "any") == 0) | |
844 | value = AF_UNSPEC; | |
845 | else | |
846 | fatal("%s line %d: unsupported address family \"%s\".", | |
847 | filename, linenum, arg); | |
848 | if (*intptr == -1) | |
849 | *intptr = value; | |
e9a17296 | 850 | break; |
851 | ||
852 | case sHostKeyFile: | |
853 | intptr = &options->num_host_key_files; | |
854 | if (*intptr >= MAX_HOSTKEYS) | |
855 | fatal("%s line %d: too many host keys specified (max %d).", | |
856 | filename, linenum, MAX_HOSTKEYS); | |
857 | charptr = &options->host_key_files[*intptr]; | |
22616013 | 858 | parse_filename: |
e9a17296 | 859 | arg = strdelim(&cp); |
860 | if (!arg || *arg == '\0') | |
861 | fatal("%s line %d: missing file name.", | |
862 | filename, linenum); | |
9108f8d9 | 863 | if (*activep && *charptr == NULL) { |
e9a17296 | 864 | *charptr = tilde_expand_filename(arg, getuid()); |
865 | /* increase optional counter */ | |
866 | if (intptr != NULL) | |
867 | *intptr = *intptr + 1; | |
868 | } | |
869 | break; | |
3c0ef626 | 870 | |
e9a17296 | 871 | case sPidFile: |
872 | charptr = &options->pid_file; | |
873 | goto parse_filename; | |
3c0ef626 | 874 | |
e9a17296 | 875 | case sPermitRootLogin: |
876 | intptr = &options->permit_root_login; | |
877 | arg = strdelim(&cp); | |
878 | if (!arg || *arg == '\0') | |
879 | fatal("%s line %d: missing yes/" | |
880 | "without-password/forced-commands-only/no " | |
881 | "argument.", filename, linenum); | |
882 | value = 0; /* silence compiler */ | |
883 | if (strcmp(arg, "without-password") == 0) | |
884 | value = PERMIT_NO_PASSWD; | |
885 | else if (strcmp(arg, "forced-commands-only") == 0) | |
886 | value = PERMIT_FORCED_ONLY; | |
887 | else if (strcmp(arg, "yes") == 0) | |
888 | value = PERMIT_YES; | |
889 | else if (strcmp(arg, "no") == 0) | |
890 | value = PERMIT_NO; | |
891 | else | |
892 | fatal("%s line %d: Bad yes/" | |
893 | "without-password/forced-commands-only/no " | |
894 | "argument: %s", filename, linenum, arg); | |
47686178 | 895 | if (*activep && *intptr == -1) |
e9a17296 | 896 | *intptr = value; |
897 | break; | |
898 | ||
899 | case sIgnoreRhosts: | |
900 | intptr = &options->ignore_rhosts; | |
22616013 | 901 | parse_flag: |
e9a17296 | 902 | arg = strdelim(&cp); |
903 | if (!arg || *arg == '\0') | |
904 | fatal("%s line %d: missing yes/no argument.", | |
905 | filename, linenum); | |
906 | value = 0; /* silence compiler */ | |
907 | if (strcmp(arg, "yes") == 0) | |
908 | value = 1; | |
909 | else if (strcmp(arg, "no") == 0) | |
910 | value = 0; | |
911 | else | |
912 | fatal("%s line %d: Bad yes/no argument: %s", | |
913 | filename, linenum, arg); | |
9108f8d9 | 914 | if (*activep && *intptr == -1) |
e9a17296 | 915 | *intptr = value; |
916 | break; | |
917 | ||
76d45d2f | 918 | case sNoneEnabled: |
919 | intptr = &options->none_enabled; | |
920 | goto parse_flag; | |
921 | ||
922 | case sTcpRcvBufPoll: | |
923 | intptr = &options->tcp_rcv_buf_poll; | |
924 | goto parse_flag; | |
925 | ||
926 | case sHPNDisabled: | |
927 | intptr = &options->hpn_disabled; | |
928 | goto parse_flag; | |
929 | ||
930 | case sHPNBufferSize: | |
931 | intptr = &options->hpn_buffer_size; | |
932 | goto parse_int; | |
933 | ||
e9a17296 | 934 | case sIgnoreUserKnownHosts: |
935 | intptr = &options->ignore_user_known_hosts; | |
936 | goto parse_flag; | |
937 | ||
e9a17296 | 938 | case sRhostsRSAAuthentication: |
939 | intptr = &options->rhosts_rsa_authentication; | |
940 | goto parse_flag; | |
941 | ||
942 | case sHostbasedAuthentication: | |
943 | intptr = &options->hostbased_authentication; | |
944 | goto parse_flag; | |
945 | ||
946 | case sHostbasedUsesNameFromPacketOnly: | |
947 | intptr = &options->hostbased_uses_name_from_packet_only; | |
948 | goto parse_flag; | |
949 | ||
950 | case sRSAAuthentication: | |
951 | intptr = &options->rsa_authentication; | |
952 | goto parse_flag; | |
953 | ||
954 | case sPubkeyAuthentication: | |
955 | intptr = &options->pubkey_authentication; | |
956 | goto parse_flag; | |
0fff78ff | 957 | |
e9a17296 | 958 | case sKerberosAuthentication: |
959 | intptr = &options->kerberos_authentication; | |
960 | goto parse_flag; | |
3c0ef626 | 961 | |
e9a17296 | 962 | case sKerberosOrLocalPasswd: |
963 | intptr = &options->kerberos_or_local_passwd; | |
964 | goto parse_flag; | |
3c0ef626 | 965 | |
e9a17296 | 966 | case sKerberosTicketCleanup: |
967 | intptr = &options->kerberos_ticket_cleanup; | |
968 | goto parse_flag; | |
0fff78ff | 969 | |
cdd66111 | 970 | case sKerberosGetAFSToken: |
971 | intptr = &options->kerberos_get_afs_token; | |
972 | goto parse_flag; | |
973 | ||
0fff78ff | 974 | case sGssAuthentication: |
975 | intptr = &options->gss_authentication; | |
e9a17296 | 976 | goto parse_flag; |
0fff78ff | 977 | |
f97edba6 | 978 | case sGssKeyEx: |
979 | intptr = &options->gss_keyex; | |
980 | goto parse_flag; | |
981 | ||
0fff78ff | 982 | case sGssCleanupCreds: |
983 | intptr = &options->gss_cleanup_creds; | |
e9a17296 | 984 | goto parse_flag; |
3c0ef626 | 985 | |
f97edba6 | 986 | case sGssStrictAcceptor: |
987 | intptr = &options->gss_strict_acceptor; | |
988 | goto parse_flag; | |
989 | ||
990 | case sGssStoreRekey: | |
991 | intptr = &options->gss_store_rekey; | |
992 | goto parse_flag; | |
993 | ||
e9a17296 | 994 | case sPasswordAuthentication: |
995 | intptr = &options->password_authentication; | |
996 | goto parse_flag; | |
3c0ef626 | 997 | |
91d9cdd3 | 998 | case sZeroKnowledgePasswordAuthentication: |
999 | intptr = &options->zero_knowledge_password_authentication; | |
1000 | goto parse_flag; | |
1001 | ||
e9a17296 | 1002 | case sKbdInteractiveAuthentication: |
1003 | intptr = &options->kbd_interactive_authentication; | |
1004 | goto parse_flag; | |
3c0ef626 | 1005 | |
e9a17296 | 1006 | case sChallengeResponseAuthentication: |
1007 | intptr = &options->challenge_response_authentication; | |
1008 | goto parse_flag; | |
3c0ef626 | 1009 | |
e9a17296 | 1010 | case sPrintMotd: |
1011 | intptr = &options->print_motd; | |
1012 | goto parse_flag; | |
3c0ef626 | 1013 | |
e9a17296 | 1014 | case sPrintLastLog: |
1015 | intptr = &options->print_lastlog; | |
1016 | goto parse_flag; | |
3c0ef626 | 1017 | |
e9a17296 | 1018 | case sX11Forwarding: |
1019 | intptr = &options->x11_forwarding; | |
1020 | goto parse_flag; | |
3c0ef626 | 1021 | |
e9a17296 | 1022 | case sX11DisplayOffset: |
1023 | intptr = &options->x11_display_offset; | |
1024 | goto parse_int; | |
3c0ef626 | 1025 | |
e9a17296 | 1026 | case sX11UseLocalhost: |
1027 | intptr = &options->x11_use_localhost; | |
1028 | goto parse_flag; | |
3c0ef626 | 1029 | |
e9a17296 | 1030 | case sXAuthLocation: |
1031 | charptr = &options->xauth_location; | |
1032 | goto parse_filename; | |
3c0ef626 | 1033 | |
e9a17296 | 1034 | case sStrictModes: |
1035 | intptr = &options->strict_modes; | |
1036 | goto parse_flag; | |
3c0ef626 | 1037 | |
cdd66111 | 1038 | case sTCPKeepAlive: |
1039 | intptr = &options->tcp_keep_alive; | |
e9a17296 | 1040 | goto parse_flag; |
3c0ef626 | 1041 | |
e9a17296 | 1042 | case sEmptyPasswd: |
1043 | intptr = &options->permit_empty_passwd; | |
1044 | goto parse_flag; | |
3c0ef626 | 1045 | |
41b2f314 | 1046 | case sPermitUserEnvironment: |
1047 | intptr = &options->permit_user_env; | |
1048 | goto parse_flag; | |
1049 | ||
e9a17296 | 1050 | case sUseLogin: |
1051 | intptr = &options->use_login; | |
1052 | goto parse_flag; | |
3c0ef626 | 1053 | |
f5799ae1 | 1054 | case sCompression: |
1055 | intptr = &options->compression; | |
665a873d | 1056 | arg = strdelim(&cp); |
1057 | if (!arg || *arg == '\0') | |
1058 | fatal("%s line %d: missing yes/no/delayed " | |
1059 | "argument.", filename, linenum); | |
1060 | value = 0; /* silence compiler */ | |
1061 | if (strcmp(arg, "delayed") == 0) | |
1062 | value = COMP_DELAYED; | |
1063 | else if (strcmp(arg, "yes") == 0) | |
1064 | value = COMP_ZLIB; | |
1065 | else if (strcmp(arg, "no") == 0) | |
1066 | value = COMP_NONE; | |
1067 | else | |
1068 | fatal("%s line %d: Bad yes/no/delayed " | |
1069 | "argument: %s", filename, linenum, arg); | |
1070 | if (*intptr == -1) | |
1071 | *intptr = value; | |
1072 | break; | |
f5799ae1 | 1073 | |
e9a17296 | 1074 | case sGatewayPorts: |
1075 | intptr = &options->gateway_ports; | |
996d5e62 | 1076 | arg = strdelim(&cp); |
1077 | if (!arg || *arg == '\0') | |
1078 | fatal("%s line %d: missing yes/no/clientspecified " | |
1079 | "argument.", filename, linenum); | |
1080 | value = 0; /* silence compiler */ | |
1081 | if (strcmp(arg, "clientspecified") == 0) | |
1082 | value = 2; | |
1083 | else if (strcmp(arg, "yes") == 0) | |
1084 | value = 1; | |
1085 | else if (strcmp(arg, "no") == 0) | |
1086 | value = 0; | |
1087 | else | |
1088 | fatal("%s line %d: Bad yes/no/clientspecified " | |
1089 | "argument: %s", filename, linenum, arg); | |
799ae497 | 1090 | if (*activep && *intptr == -1) |
996d5e62 | 1091 | *intptr = value; |
1092 | break; | |
3c0ef626 | 1093 | |
0fff78ff | 1094 | case sUseDNS: |
1095 | intptr = &options->use_dns; | |
e9a17296 | 1096 | goto parse_flag; |
3c0ef626 | 1097 | |
e9a17296 | 1098 | case sLogFacility: |
47686178 | 1099 | log_facility_ptr = &options->log_facility; |
e9a17296 | 1100 | arg = strdelim(&cp); |
1101 | value = log_facility_number(arg); | |
1102 | if (value == SYSLOG_FACILITY_NOT_SET) | |
1103 | fatal("%.200s line %d: unsupported log facility '%s'", | |
1104 | filename, linenum, arg ? arg : "<NONE>"); | |
47686178 | 1105 | if (*log_facility_ptr == -1) |
1106 | *log_facility_ptr = (SyslogFacility) value; | |
e9a17296 | 1107 | break; |
1108 | ||
1109 | case sLogLevel: | |
47686178 | 1110 | log_level_ptr = &options->log_level; |
e9a17296 | 1111 | arg = strdelim(&cp); |
1112 | value = log_level_number(arg); | |
1113 | if (value == SYSLOG_LEVEL_NOT_SET) | |
1114 | fatal("%.200s line %d: unsupported log level '%s'", | |
1115 | filename, linenum, arg ? arg : "<NONE>"); | |
47686178 | 1116 | if (*log_level_ptr == -1) |
1117 | *log_level_ptr = (LogLevel) value; | |
e9a17296 | 1118 | break; |
1119 | ||
1120 | case sAllowTcpForwarding: | |
1121 | intptr = &options->allow_tcp_forwarding; | |
1122 | goto parse_flag; | |
1123 | ||
22616013 | 1124 | case sAllowAgentForwarding: |
1125 | intptr = &options->allow_agent_forwarding; | |
1126 | goto parse_flag; | |
1127 | ||
700318f3 | 1128 | case sUsePrivilegeSeparation: |
1129 | intptr = &use_privsep; | |
1130 | goto parse_flag; | |
1131 | ||
e9a17296 | 1132 | case sAllowUsers: |
1133 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1134 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
1135 | fatal("%s line %d: too many allow users.", | |
1136 | filename, linenum); | |
680cee3b | 1137 | options->allow_users[options->num_allow_users++] = |
1138 | xstrdup(arg); | |
e9a17296 | 1139 | } |
1140 | break; | |
3c0ef626 | 1141 | |
e9a17296 | 1142 | case sDenyUsers: |
1143 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1144 | if (options->num_deny_users >= MAX_DENY_USERS) | |
9108f8d9 | 1145 | fatal("%s line %d: too many deny users.", |
e9a17296 | 1146 | filename, linenum); |
680cee3b | 1147 | options->deny_users[options->num_deny_users++] = |
1148 | xstrdup(arg); | |
e9a17296 | 1149 | } |
1150 | break; | |
3c0ef626 | 1151 | |
e9a17296 | 1152 | case sAllowGroups: |
1153 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1154 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
1155 | fatal("%s line %d: too many allow groups.", | |
1156 | filename, linenum); | |
680cee3b | 1157 | options->allow_groups[options->num_allow_groups++] = |
1158 | xstrdup(arg); | |
e9a17296 | 1159 | } |
1160 | break; | |
3c0ef626 | 1161 | |
e9a17296 | 1162 | case sDenyGroups: |
1163 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1164 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
1165 | fatal("%s line %d: too many deny groups.", | |
1166 | filename, linenum); | |
1167 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
1168 | } | |
1169 | break; | |
1170 | ||
1171 | case sCiphers: | |
1172 | arg = strdelim(&cp); | |
1173 | if (!arg || *arg == '\0') | |
1174 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1175 | if (!ciphers_valid(arg)) | |
1176 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
1177 | filename, linenum, arg ? arg : "<NONE>"); | |
1178 | if (options->ciphers == NULL) | |
1179 | options->ciphers = xstrdup(arg); | |
1180 | break; | |
1181 | ||
1182 | case sMacs: | |
1183 | arg = strdelim(&cp); | |
1184 | if (!arg || *arg == '\0') | |
1185 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1186 | if (!mac_valid(arg)) | |
1187 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
1188 | filename, linenum, arg ? arg : "<NONE>"); | |
1189 | if (options->macs == NULL) | |
1190 | options->macs = xstrdup(arg); | |
1191 | break; | |
1192 | ||
1193 | case sProtocol: | |
1194 | intptr = &options->protocol; | |
1195 | arg = strdelim(&cp); | |
1196 | if (!arg || *arg == '\0') | |
1197 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1198 | value = proto_spec(arg); | |
1199 | if (value == SSH_PROTO_UNKNOWN) | |
1200 | fatal("%s line %d: Bad protocol spec '%s'.", | |
1201 | filename, linenum, arg ? arg : "<NONE>"); | |
1202 | if (*intptr == SSH_PROTO_UNKNOWN) | |
1203 | *intptr = value; | |
1204 | break; | |
1205 | ||
1206 | case sSubsystem: | |
1207 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
1208 | fatal("%s line %d: too many subsystems defined.", | |
1209 | filename, linenum); | |
1210 | } | |
1211 | arg = strdelim(&cp); | |
1212 | if (!arg || *arg == '\0') | |
1213 | fatal("%s line %d: Missing subsystem name.", | |
1214 | filename, linenum); | |
9108f8d9 | 1215 | if (!*activep) { |
1216 | arg = strdelim(&cp); | |
1217 | break; | |
1218 | } | |
e9a17296 | 1219 | for (i = 0; i < options->num_subsystems; i++) |
1220 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
1221 | fatal("%s line %d: Subsystem '%s' already defined.", | |
1222 | filename, linenum, arg); | |
1223 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
1224 | arg = strdelim(&cp); | |
1225 | if (!arg || *arg == '\0') | |
1226 | fatal("%s line %d: Missing subsystem command.", | |
1227 | filename, linenum); | |
1228 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
9108f8d9 | 1229 | |
1230 | /* Collect arguments (separate to executable) */ | |
1231 | p = xstrdup(arg); | |
1232 | len = strlen(p) + 1; | |
1233 | while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
1234 | len += 1 + strlen(arg); | |
1235 | p = xrealloc(p, 1, len); | |
1236 | strlcat(p, " ", len); | |
1237 | strlcat(p, arg, len); | |
1238 | } | |
1239 | options->subsystem_args[options->num_subsystems] = p; | |
e9a17296 | 1240 | options->num_subsystems++; |
1241 | break; | |
1242 | ||
1243 | case sMaxStartups: | |
1244 | arg = strdelim(&cp); | |
1245 | if (!arg || *arg == '\0') | |
1246 | fatal("%s line %d: Missing MaxStartups spec.", | |
1247 | filename, linenum); | |
1248 | if ((n = sscanf(arg, "%d:%d:%d", | |
1249 | &options->max_startups_begin, | |
1250 | &options->max_startups_rate, | |
1251 | &options->max_startups)) == 3) { | |
1252 | if (options->max_startups_begin > | |
1253 | options->max_startups || | |
1254 | options->max_startups_rate > 100 || | |
1255 | options->max_startups_rate < 1) | |
3c0ef626 | 1256 | fatal("%s line %d: Illegal MaxStartups spec.", |
1257 | filename, linenum); | |
e9a17296 | 1258 | } else if (n != 1) |
1259 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1260 | filename, linenum); | |
1261 | else | |
1262 | options->max_startups = options->max_startups_begin; | |
1263 | break; | |
1264 | ||
c9f39d2c | 1265 | case sMaxAuthTries: |
1266 | intptr = &options->max_authtries; | |
1267 | goto parse_int; | |
1268 | ||
22616013 | 1269 | case sMaxSessions: |
1270 | intptr = &options->max_sessions; | |
1271 | goto parse_int; | |
1272 | ||
e9a17296 | 1273 | case sBanner: |
1274 | charptr = &options->banner; | |
1275 | goto parse_filename; | |
47686178 | 1276 | |
e9a17296 | 1277 | /* |
1278 | * These options can contain %X options expanded at | |
1279 | * connect time, so that you can specify paths like: | |
1280 | * | |
1281 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
1282 | */ | |
1283 | case sAuthorizedKeysFile: | |
1284 | case sAuthorizedKeysFile2: | |
9108f8d9 | 1285 | charptr = (opcode == sAuthorizedKeysFile) ? |
e9a17296 | 1286 | &options->authorized_keys_file : |
1287 | &options->authorized_keys_file2; | |
1288 | goto parse_filename; | |
1289 | ||
1290 | case sClientAliveInterval: | |
1291 | intptr = &options->client_alive_interval; | |
1292 | goto parse_time; | |
1293 | ||
1294 | case sClientAliveCountMax: | |
1295 | intptr = &options->client_alive_count_max; | |
1296 | goto parse_int; | |
1297 | ||
c9f39d2c | 1298 | case sAcceptEnv: |
1299 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1300 | if (strchr(arg, '=') != NULL) | |
1301 | fatal("%s line %d: Invalid environment name.", | |
1302 | filename, linenum); | |
1303 | if (options->num_accept_env >= MAX_ACCEPT_ENV) | |
1304 | fatal("%s line %d: too many allow env.", | |
1305 | filename, linenum); | |
9108f8d9 | 1306 | if (!*activep) |
1307 | break; | |
c9f39d2c | 1308 | options->accept_env[options->num_accept_env++] = |
1309 | xstrdup(arg); | |
1310 | } | |
1311 | break; | |
1312 | ||
2c06c99b | 1313 | case sPermitTunnel: |
1314 | intptr = &options->permit_tun; | |
1315 | arg = strdelim(&cp); | |
1316 | if (!arg || *arg == '\0') | |
1317 | fatal("%s line %d: Missing yes/point-to-point/" | |
1318 | "ethernet/no argument.", filename, linenum); | |
22616013 | 1319 | value = -1; |
1320 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1321 | if (strcmp(tunmode_desc[i].text, arg) == 0) { | |
1322 | value = tunmode_desc[i].val; | |
1323 | break; | |
1324 | } | |
1325 | if (value == -1) | |
2c06c99b | 1326 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" |
1327 | "no argument: %s", filename, linenum, arg); | |
1328 | if (*intptr == -1) | |
1329 | *intptr = value; | |
1330 | break; | |
1331 | ||
9108f8d9 | 1332 | case sMatch: |
1333 | if (cmdline) | |
1334 | fatal("Match directive not supported as a command-line " | |
1335 | "option"); | |
1336 | value = match_cfg_line(&cp, linenum, user, host, address); | |
1337 | if (value < 0) | |
1338 | fatal("%s line %d: Bad Match condition", filename, | |
1339 | linenum); | |
1340 | *activep = value; | |
1341 | break; | |
1342 | ||
1343 | case sPermitOpen: | |
1344 | arg = strdelim(&cp); | |
1345 | if (!arg || *arg == '\0') | |
1346 | fatal("%s line %d: missing PermitOpen specification", | |
1347 | filename, linenum); | |
799ae497 | 1348 | n = options->num_permitted_opens; /* modified later */ |
9108f8d9 | 1349 | if (strcmp(arg, "any") == 0) { |
799ae497 | 1350 | if (*activep && n == -1) { |
9108f8d9 | 1351 | channel_clear_adm_permitted_opens(); |
1352 | options->num_permitted_opens = 0; | |
1353 | } | |
1354 | break; | |
1355 | } | |
799ae497 | 1356 | if (*activep && n == -1) |
1357 | channel_clear_adm_permitted_opens(); | |
9108f8d9 | 1358 | for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { |
1359 | p = hpdelim(&arg); | |
1360 | if (p == NULL) | |
1361 | fatal("%s line %d: missing host in PermitOpen", | |
1362 | filename, linenum); | |
1363 | p = cleanhostname(p); | |
91d9cdd3 | 1364 | if (arg == NULL || (port = a2port(arg)) <= 0) |
9108f8d9 | 1365 | fatal("%s line %d: bad port number in " |
1366 | "PermitOpen", filename, linenum); | |
799ae497 | 1367 | if (*activep && n == -1) |
9108f8d9 | 1368 | options->num_permitted_opens = |
1369 | channel_add_adm_permitted_opens(p, port); | |
9108f8d9 | 1370 | } |
1371 | break; | |
1372 | ||
1373 | case sForceCommand: | |
1374 | if (cp == NULL) | |
1375 | fatal("%.200s line %d: Missing argument.", filename, | |
1376 | linenum); | |
1377 | len = strspn(cp, WHITESPACE); | |
1378 | if (*activep && options->adm_forced_command == NULL) | |
1379 | options->adm_forced_command = xstrdup(cp + len); | |
1380 | return 0; | |
1381 | ||
47686178 | 1382 | case sChrootDirectory: |
1383 | charptr = &options->chroot_directory; | |
1384 | ||
1385 | arg = strdelim(&cp); | |
1386 | if (!arg || *arg == '\0') | |
1387 | fatal("%s line %d: missing file name.", | |
1388 | filename, linenum); | |
1389 | if (*activep && *charptr == NULL) | |
1390 | *charptr = xstrdup(arg); | |
1391 | break; | |
1392 | ||
e9a17296 | 1393 | case sDeprecated: |
0fff78ff | 1394 | logit("%s line %d: Deprecated option %s", |
1395 | filename, linenum, arg); | |
1396 | while (arg) | |
1397 | arg = strdelim(&cp); | |
1398 | break; | |
1399 | ||
1400 | case sUnsupported: | |
1401 | logit("%s line %d: Unsupported option %s", | |
e9a17296 | 1402 | filename, linenum, arg); |
1403 | while (arg) | |
1404 | arg = strdelim(&cp); | |
1405 | break; | |
1406 | ||
1407 | default: | |
1408 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
1409 | filename, linenum, arg, opcode); | |
1410 | } | |
1411 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
1412 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
1413 | filename, linenum, arg); | |
1414 | return 0; | |
1415 | } | |
3c0ef626 | 1416 | |
e9a17296 | 1417 | /* Reads the server configuration file. */ |
3c0ef626 | 1418 | |
e9a17296 | 1419 | void |
c9f39d2c | 1420 | load_server_config(const char *filename, Buffer *conf) |
e9a17296 | 1421 | { |
c9f39d2c | 1422 | char line[1024], *cp; |
680cee3b | 1423 | FILE *f; |
e9a17296 | 1424 | |
c9f39d2c | 1425 | debug2("%s: filename %s", __func__, filename); |
1426 | if ((f = fopen(filename, "r")) == NULL) { | |
e9a17296 | 1427 | perror(filename); |
1428 | exit(1); | |
1429 | } | |
c9f39d2c | 1430 | buffer_clear(conf); |
e9a17296 | 1431 | while (fgets(line, sizeof(line), f)) { |
c9f39d2c | 1432 | /* |
1433 | * Trim out comments and strip whitespace | |
1434 | * NB - preserve newlines, they are needed to reproduce | |
1435 | * line numbers later for error messages | |
1436 | */ | |
1437 | if ((cp = strchr(line, '#')) != NULL) | |
1438 | memcpy(cp, "\n", 2); | |
1439 | cp = line + strspn(line, " \t\r"); | |
1440 | ||
1441 | buffer_append(conf, cp, strlen(cp)); | |
3c0ef626 | 1442 | } |
c9f39d2c | 1443 | buffer_append(conf, "\0", 1); |
3c0ef626 | 1444 | fclose(f); |
c9f39d2c | 1445 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); |
1446 | } | |
1447 | ||
1448 | void | |
9108f8d9 | 1449 | parse_server_match_config(ServerOptions *options, const char *user, |
1450 | const char *host, const char *address) | |
1451 | { | |
1452 | ServerOptions mo; | |
1453 | ||
1454 | initialize_server_options(&mo); | |
1455 | parse_server_config(&mo, "reprocess config", &cfg, user, host, address); | |
799ae497 | 1456 | copy_set_server_options(options, &mo, 0); |
9108f8d9 | 1457 | } |
1458 | ||
799ae497 | 1459 | /* Helper macros */ |
1460 | #define M_CP_INTOPT(n) do {\ | |
1461 | if (src->n != -1) \ | |
1462 | dst->n = src->n; \ | |
1463 | } while (0) | |
1464 | #define M_CP_STROPT(n) do {\ | |
1465 | if (src->n != NULL) { \ | |
1466 | if (dst->n != NULL) \ | |
1467 | xfree(dst->n); \ | |
1468 | dst->n = src->n; \ | |
1469 | } \ | |
1470 | } while(0) | |
1471 | ||
1472 | /* | |
1473 | * Copy any supported values that are set. | |
1474 | * | |
1475 | * If the preauth flag is set, we do not bother copying the the string or | |
1476 | * array values that are not used pre-authentication, because any that we | |
1477 | * do use must be explictly sent in mm_getpwnamallow(). | |
1478 | */ | |
9108f8d9 | 1479 | void |
799ae497 | 1480 | copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) |
9108f8d9 | 1481 | { |
799ae497 | 1482 | M_CP_INTOPT(password_authentication); |
1483 | M_CP_INTOPT(gss_authentication); | |
1484 | M_CP_INTOPT(rsa_authentication); | |
1485 | M_CP_INTOPT(pubkey_authentication); | |
1486 | M_CP_INTOPT(kerberos_authentication); | |
1487 | M_CP_INTOPT(hostbased_authentication); | |
1488 | M_CP_INTOPT(kbd_interactive_authentication); | |
91d9cdd3 | 1489 | M_CP_INTOPT(zero_knowledge_password_authentication); |
47686178 | 1490 | M_CP_INTOPT(permit_root_login); |
91d9cdd3 | 1491 | M_CP_INTOPT(permit_empty_passwd); |
799ae497 | 1492 | |
1493 | M_CP_INTOPT(allow_tcp_forwarding); | |
22616013 | 1494 | M_CP_INTOPT(allow_agent_forwarding); |
799ae497 | 1495 | M_CP_INTOPT(gateway_ports); |
1496 | M_CP_INTOPT(x11_display_offset); | |
1497 | M_CP_INTOPT(x11_forwarding); | |
1498 | M_CP_INTOPT(x11_use_localhost); | |
22616013 | 1499 | M_CP_INTOPT(max_sessions); |
1500 | M_CP_INTOPT(max_authtries); | |
799ae497 | 1501 | |
1502 | M_CP_STROPT(banner); | |
1503 | if (preauth) | |
1504 | return; | |
1505 | M_CP_STROPT(adm_forced_command); | |
47686178 | 1506 | M_CP_STROPT(chroot_directory); |
9108f8d9 | 1507 | } |
1508 | ||
799ae497 | 1509 | #undef M_CP_INTOPT |
1510 | #undef M_CP_STROPT | |
1511 | ||
9108f8d9 | 1512 | void |
1513 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, | |
1514 | const char *user, const char *host, const char *address) | |
c9f39d2c | 1515 | { |
9108f8d9 | 1516 | int active, linenum, bad_options = 0; |
c9f39d2c | 1517 | char *cp, *obuf, *cbuf; |
1518 | ||
1519 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); | |
1520 | ||
1521 | obuf = cbuf = xstrdup(buffer_ptr(conf)); | |
9108f8d9 | 1522 | active = user ? 0 : 1; |
c9f39d2c | 1523 | linenum = 1; |
dec6d9fe | 1524 | while ((cp = strsep(&cbuf, "\n")) != NULL) { |
c9f39d2c | 1525 | if (process_server_config_line(options, cp, filename, |
9108f8d9 | 1526 | linenum++, &active, user, host, address) != 0) |
c9f39d2c | 1527 | bad_options++; |
1528 | } | |
1529 | xfree(obuf); | |
3c0ef626 | 1530 | if (bad_options > 0) |
1531 | fatal("%s: terminating, %d bad configuration options", | |
1532 | filename, bad_options); | |
1533 | } | |
22616013 | 1534 | |
1535 | static const char * | |
1536 | fmt_intarg(ServerOpCodes code, int val) | |
1537 | { | |
1538 | if (code == sAddressFamily) { | |
1539 | switch (val) { | |
1540 | case AF_INET: | |
1541 | return "inet"; | |
1542 | case AF_INET6: | |
1543 | return "inet6"; | |
1544 | case AF_UNSPEC: | |
1545 | return "any"; | |
1546 | default: | |
1547 | return "UNKNOWN"; | |
1548 | } | |
1549 | } | |
1550 | if (code == sPermitRootLogin) { | |
1551 | switch (val) { | |
1552 | case PERMIT_NO_PASSWD: | |
91d9cdd3 | 1553 | return "without-password"; |
22616013 | 1554 | case PERMIT_FORCED_ONLY: |
1555 | return "forced-commands-only"; | |
1556 | case PERMIT_YES: | |
1557 | return "yes"; | |
1558 | } | |
1559 | } | |
1560 | if (code == sProtocol) { | |
1561 | switch (val) { | |
1562 | case SSH_PROTO_1: | |
1563 | return "1"; | |
1564 | case SSH_PROTO_2: | |
1565 | return "2"; | |
1566 | case (SSH_PROTO_1|SSH_PROTO_2): | |
1567 | return "2,1"; | |
1568 | default: | |
1569 | return "UNKNOWN"; | |
1570 | } | |
1571 | } | |
1572 | if (code == sGatewayPorts && val == 2) | |
1573 | return "clientspecified"; | |
1574 | if (code == sCompression && val == COMP_DELAYED) | |
1575 | return "delayed"; | |
1576 | switch (val) { | |
1577 | case -1: | |
1578 | return "unset"; | |
1579 | case 0: | |
1580 | return "no"; | |
1581 | case 1: | |
1582 | return "yes"; | |
1583 | } | |
1584 | return "UNKNOWN"; | |
1585 | } | |
1586 | ||
1587 | static const char * | |
1588 | lookup_opcode_name(ServerOpCodes code) | |
1589 | { | |
1590 | u_int i; | |
1591 | ||
1592 | for (i = 0; keywords[i].name != NULL; i++) | |
1593 | if (keywords[i].opcode == code) | |
1594 | return(keywords[i].name); | |
1595 | return "UNKNOWN"; | |
1596 | } | |
1597 | ||
1598 | static void | |
1599 | dump_cfg_int(ServerOpCodes code, int val) | |
1600 | { | |
1601 | printf("%s %d\n", lookup_opcode_name(code), val); | |
1602 | } | |
1603 | ||
1604 | static void | |
1605 | dump_cfg_fmtint(ServerOpCodes code, int val) | |
1606 | { | |
1607 | printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); | |
1608 | } | |
1609 | ||
1610 | static void | |
1611 | dump_cfg_string(ServerOpCodes code, const char *val) | |
1612 | { | |
1613 | if (val == NULL) | |
1614 | return; | |
1615 | printf("%s %s\n", lookup_opcode_name(code), val); | |
1616 | } | |
1617 | ||
1618 | static void | |
1619 | dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals) | |
1620 | { | |
1621 | u_int i; | |
1622 | ||
1623 | for (i = 0; i < count; i++) | |
1624 | printf("%s %s\n", lookup_opcode_name(code), vals[i]); | |
1625 | } | |
1626 | ||
1627 | void | |
1628 | dump_config(ServerOptions *o) | |
1629 | { | |
1630 | u_int i; | |
1631 | int ret; | |
1632 | struct addrinfo *ai; | |
1633 | char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL; | |
1634 | ||
1635 | /* these are usually at the top of the config */ | |
1636 | for (i = 0; i < o->num_ports; i++) | |
1637 | printf("port %d\n", o->ports[i]); | |
1638 | dump_cfg_fmtint(sProtocol, o->protocol); | |
1639 | dump_cfg_fmtint(sAddressFamily, o->address_family); | |
1640 | ||
1641 | /* ListenAddress must be after Port */ | |
1642 | for (ai = o->listen_addrs; ai; ai = ai->ai_next) { | |
1643 | if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, | |
1644 | sizeof(addr), port, sizeof(port), | |
1645 | NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { | |
1646 | error("getnameinfo failed: %.100s", | |
1647 | (ret != EAI_SYSTEM) ? gai_strerror(ret) : | |
1648 | strerror(errno)); | |
1649 | } else { | |
1650 | if (ai->ai_family == AF_INET6) | |
1651 | printf("listenaddress [%s]:%s\n", addr, port); | |
1652 | else | |
1653 | printf("listenaddress %s:%s\n", addr, port); | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | /* integer arguments */ | |
91d9cdd3 | 1658 | #ifdef USE_PAM |
1659 | dump_cfg_int(sUsePAM, o->use_pam); | |
1660 | #endif | |
22616013 | 1661 | dump_cfg_int(sServerKeyBits, o->server_key_bits); |
1662 | dump_cfg_int(sLoginGraceTime, o->login_grace_time); | |
1663 | dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time); | |
1664 | dump_cfg_int(sX11DisplayOffset, o->x11_display_offset); | |
1665 | dump_cfg_int(sMaxAuthTries, o->max_authtries); | |
91d9cdd3 | 1666 | dump_cfg_int(sMaxSessions, o->max_sessions); |
22616013 | 1667 | dump_cfg_int(sClientAliveInterval, o->client_alive_interval); |
1668 | dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); | |
1669 | ||
1670 | /* formatted integer arguments */ | |
1671 | dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); | |
1672 | dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts); | |
1673 | dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts); | |
1674 | dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication); | |
1675 | dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication); | |
1676 | dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly, | |
1677 | o->hostbased_uses_name_from_packet_only); | |
1678 | dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication); | |
1679 | dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication); | |
91d9cdd3 | 1680 | #ifdef KRB5 |
22616013 | 1681 | dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication); |
1682 | dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd); | |
1683 | dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup); | |
91d9cdd3 | 1684 | # ifdef USE_AFS |
22616013 | 1685 | dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token); |
91d9cdd3 | 1686 | # endif |
1687 | #endif | |
1688 | #ifdef GSSAPI | |
22616013 | 1689 | dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); |
1690 | dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); | |
91d9cdd3 | 1691 | #endif |
1692 | #ifdef JPAKE | |
1693 | dump_cfg_fmtint(sZeroKnowledgePasswordAuthentication, | |
1694 | o->zero_knowledge_password_authentication); | |
1695 | #endif | |
22616013 | 1696 | dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); |
1697 | dump_cfg_fmtint(sKbdInteractiveAuthentication, | |
1698 | o->kbd_interactive_authentication); | |
1699 | dump_cfg_fmtint(sChallengeResponseAuthentication, | |
1700 | o->challenge_response_authentication); | |
1701 | dump_cfg_fmtint(sPrintMotd, o->print_motd); | |
1702 | dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); | |
1703 | dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); | |
1704 | dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); | |
1705 | dump_cfg_fmtint(sStrictModes, o->strict_modes); | |
1706 | dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); | |
1707 | dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); | |
1708 | dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); | |
1709 | dump_cfg_fmtint(sUseLogin, o->use_login); | |
1710 | dump_cfg_fmtint(sCompression, o->compression); | |
1711 | dump_cfg_fmtint(sGatewayPorts, o->gateway_ports); | |
1712 | dump_cfg_fmtint(sUseDNS, o->use_dns); | |
1713 | dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); | |
1714 | dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep); | |
1715 | ||
1716 | /* string arguments */ | |
1717 | dump_cfg_string(sPidFile, o->pid_file); | |
1718 | dump_cfg_string(sXAuthLocation, o->xauth_location); | |
1719 | dump_cfg_string(sCiphers, o->ciphers); | |
1720 | dump_cfg_string(sMacs, o->macs); | |
1721 | dump_cfg_string(sBanner, o->banner); | |
1722 | dump_cfg_string(sAuthorizedKeysFile, o->authorized_keys_file); | |
1723 | dump_cfg_string(sAuthorizedKeysFile2, o->authorized_keys_file2); | |
1724 | dump_cfg_string(sForceCommand, o->adm_forced_command); | |
1725 | ||
1726 | /* string arguments requiring a lookup */ | |
1727 | dump_cfg_string(sLogLevel, log_level_name(o->log_level)); | |
1728 | dump_cfg_string(sLogFacility, log_facility_name(o->log_facility)); | |
1729 | ||
1730 | /* string array arguments */ | |
1731 | dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, | |
1732 | o->host_key_files); | |
1733 | dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); | |
1734 | dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); | |
1735 | dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); | |
1736 | dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); | |
1737 | dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); | |
1738 | ||
1739 | /* other arguments */ | |
1740 | for (i = 0; i < o->num_subsystems; i++) | |
1741 | printf("subsystem %s %s\n", o->subsystem_name[i], | |
1742 | o->subsystem_args[i]); | |
1743 | ||
1744 | printf("maxstartups %d:%d:%d\n", o->max_startups_begin, | |
1745 | o->max_startups_rate, o->max_startups); | |
1746 | ||
1747 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1748 | if (tunmode_desc[i].val == o->permit_tun) { | |
1749 | s = tunmode_desc[i].text; | |
1750 | break; | |
1751 | } | |
1752 | dump_cfg_string(sPermitTunnel, s); | |
1753 | ||
22616013 | 1754 | channel_print_adm_permitted_opens(); |
22616013 | 1755 | } |