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