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e74dc197 | 1 | /* $OpenBSD: servconf.c,v 1.177 2008/02/10 10:54:28 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 | |
30460aeb | 15 | #include <sys/types.h> |
16 | #include <sys/socket.h> | |
17 | ||
18 | #include <netdb.h> | |
19 | #include <pwd.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <signal.h> | |
24 | #include <unistd.h> | |
25 | #include <stdarg.h> | |
26 | ||
27 | #include "xmalloc.h" | |
3c0ef626 | 28 | #include "ssh.h" |
29 | #include "log.h" | |
30460aeb | 30 | #include "buffer.h" |
3c0ef626 | 31 | #include "servconf.h" |
3c0ef626 | 32 | #include "compat.h" |
33 | #include "pathnames.h" | |
3c0ef626 | 34 | #include "misc.h" |
35 | #include "cipher.h" | |
30460aeb | 36 | #include "key.h" |
3c0ef626 | 37 | #include "kex.h" |
38 | #include "mac.h" | |
30460aeb | 39 | #include "match.h" |
40 | #include "channels.h" | |
41 | #include "groupaccess.h" | |
3c0ef626 | 42 | |
43 | static void add_listen_addr(ServerOptions *, char *, u_short); | |
44 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
45 | ||
350391c5 | 46 | /* Use of privilege separation or not */ |
47 | extern int use_privsep; | |
30460aeb | 48 | extern Buffer cfg; |
3c0ef626 | 49 | |
50 | /* Initializes the server options to their default values. */ | |
51 | ||
52 | void | |
53 | initialize_server_options(ServerOptions *options) | |
54 | { | |
55 | memset(options, 0, sizeof(*options)); | |
56 | ||
57 | /* Portable-specific options */ | |
7cac2b65 | 58 | options->use_pam = -1; |
3c0ef626 | 59 | |
60 | /* Standard Options */ | |
61 | options->num_ports = 0; | |
62 | options->ports_from_cmdline = 0; | |
63 | options->listen_addrs = NULL; | |
dfddba3d | 64 | options->address_family = -1; |
3c0ef626 | 65 | options->num_host_key_files = 0; |
66 | options->pid_file = NULL; | |
67 | options->server_key_bits = -1; | |
68 | options->login_grace_time = -1; | |
69 | options->key_regeneration_time = -1; | |
70 | options->permit_root_login = PERMIT_NOT_SET; | |
71 | options->ignore_rhosts = -1; | |
72 | options->ignore_user_known_hosts = -1; | |
73 | options->print_motd = -1; | |
74 | options->print_lastlog = -1; | |
75 | options->x11_forwarding = -1; | |
76 | options->x11_display_offset = -1; | |
e9702f7d | 77 | options->x11_use_localhost = -1; |
3c0ef626 | 78 | options->xauth_location = NULL; |
79 | options->strict_modes = -1; | |
540d72c3 | 80 | options->tcp_keep_alive = -1; |
e9702f7d | 81 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
82 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
3c0ef626 | 83 | options->rhosts_rsa_authentication = -1; |
84 | options->hostbased_authentication = -1; | |
85 | options->hostbased_uses_name_from_packet_only = -1; | |
86 | options->rsa_authentication = -1; | |
87 | options->pubkey_authentication = -1; | |
3c0ef626 | 88 | options->kerberos_authentication = -1; |
89 | options->kerberos_or_local_passwd = -1; | |
90 | options->kerberos_ticket_cleanup = -1; | |
75be3237 | 91 | #ifdef SESSION_HOOKS |
92 | options->session_hooks_allow = -1; | |
93 | options->session_hooks_startup_cmd = NULL; | |
94 | options->session_hooks_shutdown_cmd = NULL; | |
3c0ef626 | 95 | #endif |
540d72c3 | 96 | options->kerberos_get_afs_token = -1; |
05ed7e1e | 97 | options->gss_authentication = -1; |
98 | options->gss_deleg_creds = -1; | |
fe4ad273 | 99 | options->gss_keyex = -1; |
7cac2b65 | 100 | options->gss_cleanup_creds = -1; |
f713db99 | 101 | options->gss_strict_acceptor = -1; |
826a9049 | 102 | options->gsi_allow_limited_proxy = -1; |
3c0ef626 | 103 | options->password_authentication = -1; |
104 | options->kbd_interactive_authentication = -1; | |
105 | options->challenge_response_authentication = -1; | |
106 | options->permit_empty_passwd = -1; | |
d03f4262 | 107 | options->permit_user_env = -1; |
3c0ef626 | 108 | options->use_login = -1; |
44a053a3 | 109 | options->compression = -1; |
3c0ef626 | 110 | options->allow_tcp_forwarding = -1; |
111 | options->num_allow_users = 0; | |
112 | options->num_deny_users = 0; | |
113 | options->num_allow_groups = 0; | |
114 | options->num_deny_groups = 0; | |
115 | options->ciphers = NULL; | |
116 | options->macs = NULL; | |
117 | options->protocol = SSH_PROTO_UNKNOWN; | |
118 | options->gateway_ports = -1; | |
119 | options->num_subsystems = 0; | |
120 | options->max_startups_begin = -1; | |
121 | options->max_startups_rate = -1; | |
122 | options->max_startups = -1; | |
7e82606e | 123 | options->max_authtries = -1; |
3c0ef626 | 124 | options->banner = NULL; |
7cac2b65 | 125 | options->use_dns = -1; |
3c0ef626 | 126 | options->client_alive_interval = -1; |
127 | options->client_alive_count_max = -1; | |
128 | options->authorized_keys_file = NULL; | |
129 | options->authorized_keys_file2 = NULL; | |
7e82606e | 130 | options->num_accept_env = 0; |
08822d99 | 131 | options->permit_tun = -1; |
30460aeb | 132 | options->num_permitted_opens = -1; |
133 | options->adm_forced_command = NULL; | |
e74dc197 | 134 | options->chroot_directory = NULL; |
f713db99 | 135 | options->none_enabled = -1; |
136 | options->tcp_rcv_buf_poll = -1; | |
137 | options->hpn_disabled = -1; | |
138 | options->hpn_buffer_size = -1; | |
3c0ef626 | 139 | } |
140 | ||
141 | void | |
142 | fill_default_server_options(ServerOptions *options) | |
143 | { | |
2d7c038e | 144 | int sock; |
145 | int socksize; | |
146 | int socksizelen = sizeof(int); | |
a7213e65 | 147 | |
3c0ef626 | 148 | /* Portable-specific options */ |
7cac2b65 | 149 | if (options->use_pam == -1) |
29d88157 | 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) | |
e9702f7d | 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) | |
174 | options->server_key_bits = 768; | |
175 | if (options->login_grace_time == -1) | |
d03f4262 | 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; | |
e9702f7d | 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; | |
540d72c3 | 199 | if (options->tcp_keep_alive == -1) |
200 | options->tcp_keep_alive = 1; | |
e9702f7d | 201 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
3c0ef626 | 202 | options->log_facility = SYSLOG_FACILITY_AUTH; |
e9702f7d | 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; | |
7cac2b65 | 215 | if (options->kerberos_authentication == -1) |
216 | options->kerberos_authentication = 0; | |
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; | |
540d72c3 | 221 | if (options->kerberos_get_afs_token == -1) |
222 | options->kerberos_get_afs_token = 0; | |
5598e598 | 223 | if (options->gss_authentication == -1) |
224 | options->gss_authentication = 1; | |
05ed7e1e | 225 | if (options->gss_deleg_creds == -1) |
226 | options->gss_deleg_creds = 1; | |
5598e598 | 227 | if (options->gss_keyex == -1) |
7cac2b65 | 228 | options->gss_keyex = 1; |
5598e598 | 229 | if (options->gss_cleanup_creds == -1) |
230 | options->gss_cleanup_creds = 1; | |
f713db99 | 231 | if (options->gss_strict_acceptor == -1) |
2d7c038e | 232 | options->gss_strict_acceptor = 1; |
826a9049 | 233 | if (options->gsi_allow_limited_proxy == -1) |
234 | options->gsi_allow_limited_proxy = 0; | |
3c0ef626 | 235 | if (options->password_authentication == -1) |
236 | options->password_authentication = 1; | |
237 | if (options->kbd_interactive_authentication == -1) | |
238 | options->kbd_interactive_authentication = 0; | |
239 | if (options->challenge_response_authentication == -1) | |
240 | options->challenge_response_authentication = 1; | |
241 | if (options->permit_empty_passwd == -1) | |
242 | options->permit_empty_passwd = 0; | |
d03f4262 | 243 | if (options->permit_user_env == -1) |
244 | options->permit_user_env = 0; | |
3c0ef626 | 245 | if (options->use_login == -1) |
246 | options->use_login = 0; | |
44a053a3 | 247 | if (options->compression == -1) |
2ce0bfe4 | 248 | options->compression = COMP_DELAYED; |
3c0ef626 | 249 | if (options->allow_tcp_forwarding == -1) |
250 | options->allow_tcp_forwarding = 1; | |
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; | |
7e82606e | 259 | if (options->max_authtries == -1) |
260 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; | |
7cac2b65 | 261 | if (options->use_dns == -1) |
262 | options->use_dns = 1; | |
3c0ef626 | 263 | if (options->client_alive_interval == -1) |
e9702f7d | 264 | options->client_alive_interval = 0; |
3c0ef626 | 265 | if (options->client_alive_count_max == -1) |
266 | options->client_alive_count_max = 3; | |
267 | if (options->authorized_keys_file2 == NULL) { | |
268 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
269 | if (options->authorized_keys_file != NULL) | |
270 | options->authorized_keys_file2 = options->authorized_keys_file; | |
271 | else | |
272 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
273 | } | |
274 | if (options->authorized_keys_file == NULL) | |
275 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
08822d99 | 276 | if (options->permit_tun == -1) |
277 | options->permit_tun = SSH_TUNMODE_NO; | |
350391c5 | 278 | |
a7213e65 | 279 | if (options->hpn_disabled == -1) |
280 | options->hpn_disabled = 0; | |
281 | ||
6df46d40 | 282 | if (options->hpn_buffer_size == -1) { |
2d7c038e | 283 | /* option not explicitly set. Now we have to figure out */ |
284 | /* what value to use */ | |
6df46d40 | 285 | if (options->hpn_disabled == 1) { |
2d7c038e | 286 | options->hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT; |
6df46d40 | 287 | } else { |
2d7c038e | 288 | /* get the current RCV size and set it to that */ |
289 | /*create a socket but don't connect it */ | |
290 | /* we use that the get the rcv socket size */ | |
291 | sock = socket(AF_INET, SOCK_STREAM, 0); | |
292 | getsockopt(sock, SOL_SOCKET, SO_RCVBUF, | |
293 | &socksize, &socksizelen); | |
294 | close(sock); | |
295 | options->hpn_buffer_size = socksize; | |
296 | debug ("HPN Buffer Size: %d", options->hpn_buffer_size); | |
297 | ||
298 | } | |
6df46d40 | 299 | } else { |
2d7c038e | 300 | /* we have to do this incase the user sets both values in a contradictory */ |
301 | /* manner. hpn_disabled overrrides hpn_buffer_size*/ | |
6df46d40 | 302 | if (options->hpn_disabled <= 0) { |
303 | if (options->hpn_buffer_size == 0) | |
304 | options->hpn_buffer_size = 1; | |
305 | /* limit the maximum buffer to 64MB */ | |
306 | if (options->hpn_buffer_size > 64*1024) { | |
307 | options->hpn_buffer_size = 64*1024*1024; | |
308 | } else { | |
309 | options->hpn_buffer_size *= 1024; | |
310 | } | |
311 | } else | |
312 | options->hpn_buffer_size = CHAN_TCP_WINDOW_DEFAULT; | |
a7213e65 | 313 | } |
314 | ||
44a053a3 | 315 | /* Turn privilege separation on by default */ |
350391c5 | 316 | if (use_privsep == -1) |
44a053a3 | 317 | use_privsep = 1; |
318 | ||
d03f4262 | 319 | #ifndef HAVE_MMAP |
44a053a3 | 320 | if (use_privsep && options->compression == 1) { |
321 | error("This platform does not support both privilege " | |
322 | "separation and compression"); | |
323 | error("Compression disabled"); | |
324 | options->compression = 0; | |
325 | } | |
326 | #endif | |
327 | ||
3c0ef626 | 328 | } |
329 | ||
330 | /* Keyword tokens. */ | |
331 | typedef enum { | |
332 | sBadOption, /* == unknown option */ | |
333 | /* Portable-specific options */ | |
7cac2b65 | 334 | sUsePAM, |
3c0ef626 | 335 | /* Standard Options */ |
336 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
337 | sPermitRootLogin, sLogFacility, sLogLevel, | |
7cac2b65 | 338 | sRhostsRSAAuthentication, sRSAAuthentication, |
3c0ef626 | 339 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
540d72c3 | 340 | sKerberosGetAFSToken, |
7cac2b65 | 341 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
75be3237 | 342 | #ifdef SESSION_HOOKS |
343 | sAllowSessionHooks, sSessionHookStartupCmd, sSessionHookShutdownCmd, | |
3c0ef626 | 344 | #endif |
dfddba3d | 345 | sPasswordAuthentication, sKbdInteractiveAuthentication, |
346 | sListenAddress, sAddressFamily, | |
3c0ef626 | 347 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e9702f7d | 348 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
540d72c3 | 349 | sStrictModes, sEmptyPasswd, sTCPKeepAlive, |
d03f4262 | 350 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
3c0ef626 | 351 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
352 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, | |
7e82606e | 353 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, |
354 | sMaxStartups, sMaxAuthTries, | |
7cac2b65 | 355 | sBanner, sUseDNS, sHostbasedAuthentication, |
e9702f7d | 356 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
3c0ef626 | 357 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
e74dc197 | 358 | sGssAuthentication, sGssCleanupCreds, |
05ed7e1e | 359 | sGssDelegateCreds, |
e74dc197 | 360 | sGssStrictAcceptor, |
a7213e65 | 361 | sGssKeyEx, |
ae82558b | 362 | sGssCredsPath, |
826a9049 | 363 | sGsiAllowLimitedProxy, |
f713db99 | 364 | sAcceptEnv, sPermitTunnel, |
e74dc197 | 365 | sMatch, sPermitOpen, sForceCommand, sChrootDirectory, |
2d7c038e | 366 | sUsePrivilegeSeparation, sNoneEnabled, sTcpRcvBufPoll, |
367 | sHPNDisabled, sHPNBufferSize, | |
7cac2b65 | 368 | sDeprecated, sUnsupported |
3c0ef626 | 369 | } ServerOpCodes; |
370 | ||
30460aeb | 371 | #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */ |
372 | #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */ | |
373 | #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH) | |
374 | ||
3c0ef626 | 375 | /* Textual representation of the tokens. */ |
376 | static struct { | |
377 | const char *name; | |
378 | ServerOpCodes opcode; | |
30460aeb | 379 | u_int flags; |
3c0ef626 | 380 | } keywords[] = { |
381 | /* Portable-specific options */ | |
7cac2b65 | 382 | #ifdef USE_PAM |
30460aeb | 383 | { "usepam", sUsePAM, SSHCFG_GLOBAL }, |
7cac2b65 | 384 | #else |
30460aeb | 385 | { "usepam", sUnsupported, SSHCFG_GLOBAL }, |
7cac2b65 | 386 | #endif |
30460aeb | 387 | { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL }, |
3c0ef626 | 388 | /* Standard Options */ |
30460aeb | 389 | { "port", sPort, SSHCFG_GLOBAL }, |
390 | { "hostkey", sHostKeyFile, SSHCFG_GLOBAL }, | |
391 | { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */ | |
392 | { "pidfile", sPidFile, SSHCFG_GLOBAL }, | |
393 | { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL }, | |
394 | { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL }, | |
395 | { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL }, | |
e74dc197 | 396 | { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL }, |
30460aeb | 397 | { "syslogfacility", sLogFacility, SSHCFG_GLOBAL }, |
398 | { "loglevel", sLogLevel, SSHCFG_GLOBAL }, | |
399 | { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL }, | |
0b90ac93 | 400 | { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, |
401 | { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, | |
30460aeb | 402 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL }, |
0b90ac93 | 403 | { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, |
404 | { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, | |
30460aeb | 405 | { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ |
7cac2b65 | 406 | #ifdef KRB5 |
0b90ac93 | 407 | { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, |
30460aeb | 408 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, |
409 | { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, | |
540d72c3 | 410 | #ifdef USE_AFS |
30460aeb | 411 | { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, |
540d72c3 | 412 | #else |
30460aeb | 413 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, |
540d72c3 | 414 | #endif |
7cac2b65 | 415 | #else |
0b90ac93 | 416 | { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, |
30460aeb | 417 | { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, |
418 | { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, | |
419 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, | |
7cac2b65 | 420 | #endif |
30460aeb | 421 | { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, |
422 | { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, | |
5598e598 | 423 | #ifdef GSSAPI |
0b90ac93 | 424 | { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, |
05ed7e1e | 425 | { "gssapidelegatecredentials", sGssDelegateCreds, SSHCFG_ALL }, |
30460aeb | 426 | { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, |
f713db99 | 427 | { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL }, |
2d7c038e | 428 | { "gssapicredentialspath", sGssCredsPath, SSHCFG_GLOBAL }, |
f713db99 | 429 | { "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL }, |
826a9049 | 430 | #ifdef GSI |
30460aeb | 431 | { "gsiallowlimitedproxy", sGsiAllowLimitedProxy, SSHCFG_GLOBAL }, |
826a9049 | 432 | #endif |
7cac2b65 | 433 | #else |
0b90ac93 | 434 | { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, |
05ed7e1e | 435 | { "gssapidelegatecredentials", sUnsupported, SSHCFG_ALL }, |
30460aeb | 436 | { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, |
f713db99 | 437 | { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL }, |
2d7c038e | 438 | { "gssapicredentialspath", sUnsupported, SSHCFG_GLOBAL }, |
f713db99 | 439 | { "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL }, |
440 | #ifdef GSI | |
441 | { "gsiallowlimitedproxy", sUnsupported, SSHCFG_GLOBAL }, | |
442 | #endif | |
3c0ef626 | 443 | #endif |
75be3237 | 444 | #ifdef SESSION_HOOKS |
30460aeb | 445 | { "allowsessionhooks", sAllowSessionHooks, SSHCFG_GLOBAL }, |
446 | { "sessionhookstartupcmd", sSessionHookStartupCmd, SSHCFG_GLOBAL }, | |
447 | { "sessionhookshutdowncmd", sSessionHookShutdownCmd, SSHCFG_GLOBAL }, | |
75be3237 | 448 | #endif |
0b90ac93 | 449 | { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, |
450 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, | |
30460aeb | 451 | { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, |
452 | { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */ | |
453 | { "checkmail", sDeprecated, SSHCFG_GLOBAL }, | |
454 | { "listenaddress", sListenAddress, SSHCFG_GLOBAL }, | |
455 | { "addressfamily", sAddressFamily, SSHCFG_GLOBAL }, | |
456 | { "printmotd", sPrintMotd, SSHCFG_GLOBAL }, | |
457 | { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL }, | |
458 | { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL }, | |
459 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL }, | |
460 | { "x11forwarding", sX11Forwarding, SSHCFG_ALL }, | |
461 | { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL }, | |
462 | { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL }, | |
463 | { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL }, | |
464 | { "strictmodes", sStrictModes, SSHCFG_GLOBAL }, | |
465 | { "permitemptypasswords", sEmptyPasswd, SSHCFG_GLOBAL }, | |
466 | { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL }, | |
467 | { "uselogin", sUseLogin, SSHCFG_GLOBAL }, | |
468 | { "compression", sCompression, SSHCFG_GLOBAL }, | |
469 | { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, | |
470 | { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */ | |
471 | { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL }, | |
472 | { "allowusers", sAllowUsers, SSHCFG_GLOBAL }, | |
473 | { "denyusers", sDenyUsers, SSHCFG_GLOBAL }, | |
474 | { "allowgroups", sAllowGroups, SSHCFG_GLOBAL }, | |
475 | { "denygroups", sDenyGroups, SSHCFG_GLOBAL }, | |
476 | { "ciphers", sCiphers, SSHCFG_GLOBAL }, | |
477 | { "macs", sMacs, SSHCFG_GLOBAL }, | |
478 | { "protocol", sProtocol, SSHCFG_GLOBAL }, | |
479 | { "gatewayports", sGatewayPorts, SSHCFG_ALL }, | |
480 | { "subsystem", sSubsystem, SSHCFG_GLOBAL }, | |
481 | { "maxstartups", sMaxStartups, SSHCFG_GLOBAL }, | |
482 | { "maxauthtries", sMaxAuthTries, SSHCFG_GLOBAL }, | |
0b90ac93 | 483 | { "banner", sBanner, SSHCFG_ALL }, |
30460aeb | 484 | { "usedns", sUseDNS, SSHCFG_GLOBAL }, |
485 | { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL }, | |
486 | { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL }, | |
487 | { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL }, | |
488 | { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL }, | |
489 | { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL }, | |
490 | { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL }, | |
491 | { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL }, | |
492 | { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL }, | |
493 | { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL }, | |
494 | { "match", sMatch, SSHCFG_ALL }, | |
495 | { "permitopen", sPermitOpen, SSHCFG_ALL }, | |
496 | { "forcecommand", sForceCommand, SSHCFG_ALL }, | |
e74dc197 | 497 | { "chrootdirectory", sChrootDirectory, SSHCFG_ALL }, |
2d7c038e | 498 | { "noneenabled", sNoneEnabled }, |
f713db99 | 499 | { "hpndisabled", sHPNDisabled }, |
500 | { "hpnbuffersize", sHPNBufferSize }, | |
501 | { "tcprcvbufpoll", sTcpRcvBufPoll }, | |
30460aeb | 502 | { NULL, sBadOption, 0 } |
3c0ef626 | 503 | }; |
504 | ||
505 | /* | |
506 | * Returns the number of the token pointed to by cp or sBadOption. | |
507 | */ | |
508 | ||
509 | static ServerOpCodes | |
510 | parse_token(const char *cp, const char *filename, | |
30460aeb | 511 | int linenum, u_int *flags) |
3c0ef626 | 512 | { |
513 | u_int i; | |
514 | ||
515 | for (i = 0; keywords[i].name; i++) | |
30460aeb | 516 | if (strcasecmp(cp, keywords[i].name) == 0) { |
2d7c038e | 517 | debug ("Config token is %s", keywords[i].name); |
30460aeb | 518 | *flags = keywords[i].flags; |
519 | return keywords[i].opcode; | |
520 | } | |
521 | ||
3c0ef626 | 522 | error("%s: line %d: Bad configuration option: %s", |
523 | filename, linenum, cp); | |
524 | return sBadOption; | |
525 | } | |
526 | ||
527 | static void | |
528 | add_listen_addr(ServerOptions *options, char *addr, u_short port) | |
529 | { | |
2ce0bfe4 | 530 | u_int i; |
3c0ef626 | 531 | |
532 | if (options->num_ports == 0) | |
533 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
dfddba3d | 534 | if (options->address_family == -1) |
535 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 536 | if (port == 0) |
537 | for (i = 0; i < options->num_ports; i++) | |
538 | add_one_listen_addr(options, addr, options->ports[i]); | |
539 | else | |
540 | add_one_listen_addr(options, addr, port); | |
541 | } | |
542 | ||
543 | static void | |
544 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) | |
545 | { | |
546 | struct addrinfo hints, *ai, *aitop; | |
547 | char strport[NI_MAXSERV]; | |
548 | int gaierr; | |
549 | ||
550 | memset(&hints, 0, sizeof(hints)); | |
dfddba3d | 551 | hints.ai_family = options->address_family; |
3c0ef626 | 552 | hints.ai_socktype = SOCK_STREAM; |
553 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
276b07a3 | 554 | snprintf(strport, sizeof strport, "%u", port); |
3c0ef626 | 555 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
556 | fatal("bad addr or host: %s (%s)", | |
557 | addr ? addr : "<NULL>", | |
e74dc197 | 558 | ssh_gai_strerror(gaierr)); |
3c0ef626 | 559 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
560 | ; | |
561 | ai->ai_next = options->listen_addrs; | |
562 | options->listen_addrs = aitop; | |
563 | } | |
564 | ||
30460aeb | 565 | /* |
566 | * The strategy for the Match blocks is that the config file is parsed twice. | |
567 | * | |
568 | * The first time is at startup. activep is initialized to 1 and the | |
569 | * directives in the global context are processed and acted on. Hitting a | |
570 | * Match directive unsets activep and the directives inside the block are | |
571 | * checked for syntax only. | |
572 | * | |
573 | * The second time is after a connection has been established but before | |
574 | * authentication. activep is initialized to 2 and global config directives | |
575 | * are ignored since they have already been processed. If the criteria in a | |
576 | * Match block is met, activep is set and the subsequent directives | |
577 | * processed and actioned until EOF or another Match block unsets it. Any | |
578 | * options set are copied into the main server config. | |
579 | * | |
580 | * Potential additions/improvements: | |
581 | * - Add Match support for pre-kex directives, eg Protocol, Ciphers. | |
582 | * | |
583 | * - Add a Tag directive (idea from David Leonard) ala pf, eg: | |
584 | * Match Address 192.168.0.* | |
585 | * Tag trusted | |
586 | * Match Group wheel | |
587 | * Tag trusted | |
588 | * Match Tag trusted | |
589 | * AllowTcpForwarding yes | |
590 | * GatewayPorts clientspecified | |
591 | * [...] | |
592 | * | |
593 | * - Add a PermittedChannelRequests directive | |
594 | * Match Group shell | |
595 | * PermittedChannelRequests session,forwarded-tcpip | |
596 | */ | |
597 | ||
598 | static int | |
599 | match_cfg_line_group(const char *grps, int line, const char *user) | |
600 | { | |
601 | int result = 0; | |
602 | u_int ngrps = 0; | |
603 | char *arg, *p, *cp, *grplist[MAX_MATCH_GROUPS]; | |
604 | struct passwd *pw; | |
605 | ||
606 | /* | |
607 | * Even if we do not have a user yet, we still need to check for | |
608 | * valid syntax. | |
609 | */ | |
610 | arg = cp = xstrdup(grps); | |
611 | while ((p = strsep(&cp, ",")) != NULL && *p != '\0') { | |
612 | if (ngrps >= MAX_MATCH_GROUPS) { | |
613 | error("line %d: too many groups in Match Group", line); | |
614 | result = -1; | |
615 | goto out; | |
616 | } | |
617 | grplist[ngrps++] = p; | |
618 | } | |
619 | ||
620 | if (user == NULL) | |
621 | goto out; | |
622 | ||
623 | if ((pw = getpwnam(user)) == NULL) { | |
624 | debug("Can't match group at line %d because user %.100s does " | |
625 | "not exist", line, user); | |
626 | } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) { | |
627 | debug("Can't Match group because user %.100s not in any group " | |
628 | "at line %d", user, line); | |
629 | } else if (ga_match(grplist, ngrps) != 1) { | |
630 | debug("user %.100s does not match group %.100s at line %d", | |
631 | user, arg, line); | |
632 | } else { | |
633 | debug("user %.100s matched group %.100s at line %d", user, | |
634 | arg, line); | |
635 | result = 1; | |
636 | } | |
637 | out: | |
638 | ga_free(); | |
639 | xfree(arg); | |
640 | return result; | |
641 | } | |
642 | ||
643 | static int | |
644 | match_cfg_line(char **condition, int line, const char *user, const char *host, | |
645 | const char *address) | |
646 | { | |
647 | int result = 1; | |
648 | char *arg, *attrib, *cp = *condition; | |
649 | size_t len; | |
650 | ||
651 | if (user == NULL) | |
652 | debug3("checking syntax for 'Match %s'", cp); | |
653 | else | |
654 | debug3("checking match for '%s' user %s host %s addr %s", cp, | |
655 | user ? user : "(null)", host ? host : "(null)", | |
656 | address ? address : "(null)"); | |
657 | ||
658 | while ((attrib = strdelim(&cp)) && *attrib != '\0') { | |
659 | if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { | |
660 | error("Missing Match criteria for %s", attrib); | |
661 | return -1; | |
662 | } | |
663 | len = strlen(arg); | |
664 | if (strcasecmp(attrib, "user") == 0) { | |
665 | if (!user) { | |
666 | result = 0; | |
667 | continue; | |
668 | } | |
669 | if (match_pattern_list(user, arg, len, 0) != 1) | |
670 | result = 0; | |
671 | else | |
672 | debug("user %.100s matched 'User %.100s' at " | |
673 | "line %d", user, arg, line); | |
674 | } else if (strcasecmp(attrib, "group") == 0) { | |
675 | switch (match_cfg_line_group(arg, line, user)) { | |
676 | case -1: | |
677 | return -1; | |
678 | case 0: | |
679 | result = 0; | |
680 | } | |
681 | } else if (strcasecmp(attrib, "host") == 0) { | |
682 | if (!host) { | |
683 | result = 0; | |
684 | continue; | |
685 | } | |
686 | if (match_hostname(host, arg, len) != 1) | |
687 | result = 0; | |
688 | else | |
689 | debug("connection from %.100s matched 'Host " | |
690 | "%.100s' at line %d", host, arg, line); | |
691 | } else if (strcasecmp(attrib, "address") == 0) { | |
30460aeb | 692 | if (!address) { |
693 | result = 0; | |
694 | continue; | |
695 | } | |
696 | if (match_hostname(address, arg, len) != 1) | |
697 | result = 0; | |
698 | else | |
699 | debug("connection from %.100s matched 'Address " | |
700 | "%.100s' at line %d", address, arg, line); | |
701 | } else { | |
702 | error("Unsupported Match attribute %s", attrib); | |
703 | return -1; | |
704 | } | |
705 | } | |
706 | if (user != NULL) | |
707 | debug3("match %sfound", result ? "" : "not "); | |
708 | *condition = cp; | |
709 | return result; | |
710 | } | |
711 | ||
712 | #define WHITESPACE " \t\r\n" | |
713 | ||
e9702f7d | 714 | int |
715 | process_server_config_line(ServerOptions *options, char *line, | |
30460aeb | 716 | const char *filename, int linenum, int *activep, const char *user, |
717 | const char *host, const char *address) | |
3c0ef626 | 718 | { |
3c0ef626 | 719 | char *cp, **charptr, *arg, *p; |
30460aeb | 720 | int cmdline = 0, *intptr, value, n; |
e74dc197 | 721 | SyslogFacility *log_facility_ptr; |
722 | LogLevel *log_level_ptr; | |
3c0ef626 | 723 | ServerOpCodes opcode; |
dfddba3d | 724 | u_short port; |
30460aeb | 725 | u_int i, flags = 0; |
726 | size_t len; | |
3c0ef626 | 727 | |
e9702f7d | 728 | cp = line; |
30460aeb | 729 | if ((arg = strdelim(&cp)) == NULL) |
730 | return 0; | |
e9702f7d | 731 | /* Ignore leading whitespace */ |
732 | if (*arg == '\0') | |
3c0ef626 | 733 | arg = strdelim(&cp); |
e9702f7d | 734 | if (!arg || !*arg || *arg == '#') |
735 | return 0; | |
736 | intptr = NULL; | |
737 | charptr = NULL; | |
30460aeb | 738 | opcode = parse_token(arg, filename, linenum, &flags); |
739 | ||
740 | if (activep == NULL) { /* We are processing a command line directive */ | |
741 | cmdline = 1; | |
742 | activep = &cmdline; | |
743 | } | |
744 | if (*activep && opcode != sMatch) | |
745 | debug3("%s:%d setting %s %s", filename, linenum, arg, cp); | |
746 | if (*activep == 0 && !(flags & SSHCFG_MATCH)) { | |
747 | if (user == NULL) { | |
748 | fatal("%s line %d: Directive '%s' is not allowed " | |
749 | "within a Match block", filename, linenum, arg); | |
750 | } else { /* this is a directive we have already processed */ | |
751 | while (arg) | |
752 | arg = strdelim(&cp); | |
753 | return 0; | |
754 | } | |
755 | } | |
a7213e65 | 756 | |
e9702f7d | 757 | switch (opcode) { |
758 | /* Portable-specific options */ | |
7cac2b65 | 759 | case sUsePAM: |
760 | intptr = &options->use_pam; | |
e9702f7d | 761 | goto parse_flag; |
3c0ef626 | 762 | |
e9702f7d | 763 | /* Standard Options */ |
764 | case sBadOption: | |
765 | return -1; | |
766 | case sPort: | |
767 | /* ignore ports from configfile if cmdline specifies ports */ | |
768 | if (options->ports_from_cmdline) | |
769 | return 0; | |
770 | if (options->listen_addrs != NULL) | |
771 | fatal("%s line %d: ports must be specified before " | |
772 | "ListenAddress.", filename, linenum); | |
773 | if (options->num_ports >= MAX_PORTS) | |
774 | fatal("%s line %d: too many ports.", | |
775 | filename, linenum); | |
776 | arg = strdelim(&cp); | |
777 | if (!arg || *arg == '\0') | |
778 | fatal("%s line %d: missing port number.", | |
779 | filename, linenum); | |
780 | options->ports[options->num_ports++] = a2port(arg); | |
781 | if (options->ports[options->num_ports-1] == 0) | |
782 | fatal("%s line %d: Badly formatted port number.", | |
783 | filename, linenum); | |
784 | break; | |
785 | ||
786 | case sServerKeyBits: | |
787 | intptr = &options->server_key_bits; | |
3c0ef626 | 788 | parse_int: |
e9702f7d | 789 | arg = strdelim(&cp); |
790 | if (!arg || *arg == '\0') | |
791 | fatal("%s line %d: missing integer value.", | |
792 | filename, linenum); | |
793 | value = atoi(arg); | |
30460aeb | 794 | if (*activep && *intptr == -1) |
e9702f7d | 795 | *intptr = value; |
796 | break; | |
797 | ||
798 | case sLoginGraceTime: | |
799 | intptr = &options->login_grace_time; | |
3c0ef626 | 800 | parse_time: |
e9702f7d | 801 | arg = strdelim(&cp); |
802 | if (!arg || *arg == '\0') | |
803 | fatal("%s line %d: missing time value.", | |
804 | filename, linenum); | |
805 | if ((value = convtime(arg)) == -1) | |
806 | fatal("%s line %d: invalid time value.", | |
807 | filename, linenum); | |
808 | if (*intptr == -1) | |
809 | *intptr = value; | |
810 | break; | |
811 | ||
812 | case sKeyRegenerationTime: | |
813 | intptr = &options->key_regeneration_time; | |
814 | goto parse_time; | |
815 | ||
816 | case sListenAddress: | |
817 | arg = strdelim(&cp); | |
dfddba3d | 818 | if (arg == NULL || *arg == '\0') |
819 | fatal("%s line %d: missing address", | |
e9702f7d | 820 | filename, linenum); |
2ce0bfe4 | 821 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ |
822 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL | |
823 | && strchr(p+1, ':') != NULL) { | |
824 | add_listen_addr(options, arg, 0); | |
825 | break; | |
826 | } | |
dfddba3d | 827 | p = hpdelim(&arg); |
828 | if (p == NULL) | |
829 | fatal("%s line %d: bad address:port usage", | |
e9702f7d | 830 | filename, linenum); |
dfddba3d | 831 | p = cleanhostname(p); |
832 | if (arg == NULL) | |
833 | port = 0; | |
834 | else if ((port = a2port(arg)) == 0) | |
835 | fatal("%s line %d: bad port number", filename, linenum); | |
836 | ||
837 | add_listen_addr(options, p, port); | |
838 | ||
839 | break; | |
840 | ||
841 | case sAddressFamily: | |
842 | arg = strdelim(&cp); | |
2ce0bfe4 | 843 | if (!arg || *arg == '\0') |
844 | fatal("%s line %d: missing address family.", | |
845 | filename, linenum); | |
dfddba3d | 846 | intptr = &options->address_family; |
847 | if (options->listen_addrs != NULL) | |
848 | fatal("%s line %d: address family must be specified before " | |
849 | "ListenAddress.", filename, linenum); | |
850 | if (strcasecmp(arg, "inet") == 0) | |
851 | value = AF_INET; | |
852 | else if (strcasecmp(arg, "inet6") == 0) | |
853 | value = AF_INET6; | |
854 | else if (strcasecmp(arg, "any") == 0) | |
855 | value = AF_UNSPEC; | |
856 | else | |
857 | fatal("%s line %d: unsupported address family \"%s\".", | |
858 | filename, linenum, arg); | |
859 | if (*intptr == -1) | |
860 | *intptr = value; | |
e9702f7d | 861 | break; |
862 | ||
863 | case sHostKeyFile: | |
864 | intptr = &options->num_host_key_files; | |
865 | if (*intptr >= MAX_HOSTKEYS) | |
866 | fatal("%s line %d: too many host keys specified (max %d).", | |
867 | filename, linenum, MAX_HOSTKEYS); | |
868 | charptr = &options->host_key_files[*intptr]; | |
3c0ef626 | 869 | parse_filename: |
e9702f7d | 870 | arg = strdelim(&cp); |
871 | if (!arg || *arg == '\0') | |
872 | fatal("%s line %d: missing file name.", | |
873 | filename, linenum); | |
30460aeb | 874 | if (*activep && *charptr == NULL) { |
e9702f7d | 875 | *charptr = tilde_expand_filename(arg, getuid()); |
876 | /* increase optional counter */ | |
877 | if (intptr != NULL) | |
878 | *intptr = *intptr + 1; | |
879 | } | |
880 | break; | |
3c0ef626 | 881 | |
e9702f7d | 882 | case sPidFile: |
883 | charptr = &options->pid_file; | |
884 | goto parse_filename; | |
3c0ef626 | 885 | |
e9702f7d | 886 | case sPermitRootLogin: |
887 | intptr = &options->permit_root_login; | |
888 | arg = strdelim(&cp); | |
889 | if (!arg || *arg == '\0') | |
890 | fatal("%s line %d: missing yes/" | |
891 | "without-password/forced-commands-only/no " | |
892 | "argument.", filename, linenum); | |
893 | value = 0; /* silence compiler */ | |
894 | if (strcmp(arg, "without-password") == 0) | |
895 | value = PERMIT_NO_PASSWD; | |
896 | else if (strcmp(arg, "forced-commands-only") == 0) | |
897 | value = PERMIT_FORCED_ONLY; | |
898 | else if (strcmp(arg, "yes") == 0) | |
899 | value = PERMIT_YES; | |
900 | else if (strcmp(arg, "no") == 0) | |
901 | value = PERMIT_NO; | |
902 | else | |
903 | fatal("%s line %d: Bad yes/" | |
904 | "without-password/forced-commands-only/no " | |
905 | "argument: %s", filename, linenum, arg); | |
e74dc197 | 906 | if (*activep && *intptr == -1) |
e9702f7d | 907 | *intptr = value; |
908 | break; | |
3c0ef626 | 909 | |
e9702f7d | 910 | case sIgnoreRhosts: |
911 | intptr = &options->ignore_rhosts; | |
912 | parse_flag: | |
913 | arg = strdelim(&cp); | |
914 | if (!arg || *arg == '\0') | |
915 | fatal("%s line %d: missing yes/no argument.", | |
916 | filename, linenum); | |
917 | value = 0; /* silence compiler */ | |
918 | if (strcmp(arg, "yes") == 0) | |
919 | value = 1; | |
920 | else if (strcmp(arg, "no") == 0) | |
921 | value = 0; | |
922 | else | |
923 | fatal("%s line %d: Bad yes/no argument: %s", | |
924 | filename, linenum, arg); | |
30460aeb | 925 | if (*activep && *intptr == -1) |
e9702f7d | 926 | *intptr = value; |
927 | break; | |
928 | ||
a7213e65 | 929 | case sNoneEnabled: |
930 | intptr = &options->none_enabled; | |
931 | goto parse_flag; | |
932 | ||
933 | case sTcpRcvBufPoll: | |
934 | intptr = &options->tcp_rcv_buf_poll; | |
935 | goto parse_flag; | |
936 | ||
937 | case sHPNDisabled: | |
938 | intptr = &options->hpn_disabled; | |
939 | goto parse_flag; | |
940 | ||
941 | case sHPNBufferSize: | |
942 | intptr = &options->hpn_buffer_size; | |
943 | goto parse_int; | |
944 | ||
e9702f7d | 945 | case sIgnoreUserKnownHosts: |
946 | intptr = &options->ignore_user_known_hosts; | |
947 | goto parse_flag; | |
948 | ||
e9702f7d | 949 | case sRhostsRSAAuthentication: |
950 | intptr = &options->rhosts_rsa_authentication; | |
951 | goto parse_flag; | |
952 | ||
953 | case sHostbasedAuthentication: | |
954 | intptr = &options->hostbased_authentication; | |
955 | goto parse_flag; | |
956 | ||
957 | case sHostbasedUsesNameFromPacketOnly: | |
958 | intptr = &options->hostbased_uses_name_from_packet_only; | |
959 | goto parse_flag; | |
960 | ||
961 | case sRSAAuthentication: | |
962 | intptr = &options->rsa_authentication; | |
963 | goto parse_flag; | |
964 | ||
965 | case sPubkeyAuthentication: | |
966 | intptr = &options->pubkey_authentication; | |
967 | goto parse_flag; | |
7cac2b65 | 968 | |
e9702f7d | 969 | case sKerberosAuthentication: |
970 | intptr = &options->kerberos_authentication; | |
971 | goto parse_flag; | |
3c0ef626 | 972 | |
e9702f7d | 973 | case sKerberosOrLocalPasswd: |
974 | intptr = &options->kerberos_or_local_passwd; | |
975 | goto parse_flag; | |
3c0ef626 | 976 | |
e9702f7d | 977 | case sKerberosTicketCleanup: |
978 | intptr = &options->kerberos_ticket_cleanup; | |
979 | goto parse_flag; | |
7cac2b65 | 980 | |
540d72c3 | 981 | case sKerberosGetAFSToken: |
982 | intptr = &options->kerberos_get_afs_token; | |
983 | goto parse_flag; | |
984 | ||
7cac2b65 | 985 | case sGssAuthentication: |
986 | intptr = &options->gss_authentication; | |
e9702f7d | 987 | goto parse_flag; |
7cac2b65 | 988 | |
05ed7e1e | 989 | case sGssDelegateCreds: |
990 | intptr = &options->gss_deleg_creds; | |
991 | goto parse_flag; | |
992 | ||
7cac2b65 | 993 | case sGssKeyEx: |
994 | intptr = &options->gss_keyex; | |
e9702f7d | 995 | goto parse_flag; |
7cac2b65 | 996 | |
7cac2b65 | 997 | case sGssCleanupCreds: |
998 | intptr = &options->gss_cleanup_creds; | |
999 | goto parse_flag; | |
1000 | ||
f713db99 | 1001 | case sGssStrictAcceptor: |
1002 | intptr = &options->gss_strict_acceptor; | |
ae82558b | 1003 | goto parse_flag; |
f713db99 | 1004 | |
2d7c038e | 1005 | case sGssCredsPath: |
1006 | charptr = &options->gss_creds_path; | |
1007 | goto parse_filename; | |
1008 | ||
826a9049 | 1009 | case sGsiAllowLimitedProxy: |
1010 | intptr = &options->gsi_allow_limited_proxy; | |
1011 | goto parse_flag; | |
1012 | ||
75be3237 | 1013 | #ifdef SESSION_HOOKS |
1014 | case sAllowSessionHooks: | |
1015 | intptr = &options->session_hooks_allow; | |
1016 | goto parse_flag; | |
1017 | case sSessionHookStartupCmd: | |
1018 | case sSessionHookShutdownCmd: | |
1019 | arg = strdelim(&cp); | |
1020 | if (!arg || *arg == '\0') | |
1021 | fatal("%s line %d: empty session hook command", | |
1022 | filename, linenum); | |
1023 | if (opcode==sSessionHookStartupCmd) | |
1024 | options->session_hooks_startup_cmd = strdup(arg); | |
1025 | else | |
1026 | options->session_hooks_shutdown_cmd = strdup(arg); | |
1027 | break; | |
1028 | #endif | |
7cac2b65 | 1029 | |
e9702f7d | 1030 | case sPasswordAuthentication: |
1031 | intptr = &options->password_authentication; | |
1032 | goto parse_flag; | |
3c0ef626 | 1033 | |
e9702f7d | 1034 | case sKbdInteractiveAuthentication: |
1035 | intptr = &options->kbd_interactive_authentication; | |
1036 | goto parse_flag; | |
3c0ef626 | 1037 | |
e9702f7d | 1038 | case sChallengeResponseAuthentication: |
1039 | intptr = &options->challenge_response_authentication; | |
1040 | goto parse_flag; | |
3c0ef626 | 1041 | |
e9702f7d | 1042 | case sPrintMotd: |
1043 | intptr = &options->print_motd; | |
1044 | goto parse_flag; | |
3c0ef626 | 1045 | |
e9702f7d | 1046 | case sPrintLastLog: |
1047 | intptr = &options->print_lastlog; | |
1048 | goto parse_flag; | |
3c0ef626 | 1049 | |
e9702f7d | 1050 | case sX11Forwarding: |
1051 | intptr = &options->x11_forwarding; | |
1052 | goto parse_flag; | |
3c0ef626 | 1053 | |
e9702f7d | 1054 | case sX11DisplayOffset: |
1055 | intptr = &options->x11_display_offset; | |
1056 | goto parse_int; | |
3c0ef626 | 1057 | |
e9702f7d | 1058 | case sX11UseLocalhost: |
1059 | intptr = &options->x11_use_localhost; | |
1060 | goto parse_flag; | |
3c0ef626 | 1061 | |
e9702f7d | 1062 | case sXAuthLocation: |
1063 | charptr = &options->xauth_location; | |
1064 | goto parse_filename; | |
3c0ef626 | 1065 | |
e9702f7d | 1066 | case sStrictModes: |
1067 | intptr = &options->strict_modes; | |
1068 | goto parse_flag; | |
3c0ef626 | 1069 | |
540d72c3 | 1070 | case sTCPKeepAlive: |
1071 | intptr = &options->tcp_keep_alive; | |
e9702f7d | 1072 | goto parse_flag; |
3c0ef626 | 1073 | |
e9702f7d | 1074 | case sEmptyPasswd: |
1075 | intptr = &options->permit_empty_passwd; | |
1076 | goto parse_flag; | |
1077 | ||
d03f4262 | 1078 | case sPermitUserEnvironment: |
1079 | intptr = &options->permit_user_env; | |
1080 | goto parse_flag; | |
1081 | ||
e9702f7d | 1082 | case sUseLogin: |
1083 | intptr = &options->use_login; | |
1084 | goto parse_flag; | |
1085 | ||
44a053a3 | 1086 | case sCompression: |
1087 | intptr = &options->compression; | |
2ce0bfe4 | 1088 | arg = strdelim(&cp); |
1089 | if (!arg || *arg == '\0') | |
1090 | fatal("%s line %d: missing yes/no/delayed " | |
1091 | "argument.", filename, linenum); | |
1092 | value = 0; /* silence compiler */ | |
1093 | if (strcmp(arg, "delayed") == 0) | |
1094 | value = COMP_DELAYED; | |
1095 | else if (strcmp(arg, "yes") == 0) | |
1096 | value = COMP_ZLIB; | |
1097 | else if (strcmp(arg, "no") == 0) | |
1098 | value = COMP_NONE; | |
1099 | else | |
1100 | fatal("%s line %d: Bad yes/no/delayed " | |
1101 | "argument: %s", filename, linenum, arg); | |
1102 | if (*intptr == -1) | |
1103 | *intptr = value; | |
1104 | break; | |
44a053a3 | 1105 | |
e9702f7d | 1106 | case sGatewayPorts: |
1107 | intptr = &options->gateway_ports; | |
dfddba3d | 1108 | arg = strdelim(&cp); |
1109 | if (!arg || *arg == '\0') | |
1110 | fatal("%s line %d: missing yes/no/clientspecified " | |
1111 | "argument.", filename, linenum); | |
1112 | value = 0; /* silence compiler */ | |
1113 | if (strcmp(arg, "clientspecified") == 0) | |
1114 | value = 2; | |
1115 | else if (strcmp(arg, "yes") == 0) | |
1116 | value = 1; | |
1117 | else if (strcmp(arg, "no") == 0) | |
1118 | value = 0; | |
1119 | else | |
1120 | fatal("%s line %d: Bad yes/no/clientspecified " | |
1121 | "argument: %s", filename, linenum, arg); | |
0b90ac93 | 1122 | if (*activep && *intptr == -1) |
dfddba3d | 1123 | *intptr = value; |
1124 | break; | |
e9702f7d | 1125 | |
7cac2b65 | 1126 | case sUseDNS: |
1127 | intptr = &options->use_dns; | |
e9702f7d | 1128 | goto parse_flag; |
1129 | ||
1130 | case sLogFacility: | |
e74dc197 | 1131 | log_facility_ptr = &options->log_facility; |
e9702f7d | 1132 | arg = strdelim(&cp); |
1133 | value = log_facility_number(arg); | |
1134 | if (value == SYSLOG_FACILITY_NOT_SET) | |
1135 | fatal("%.200s line %d: unsupported log facility '%s'", | |
1136 | filename, linenum, arg ? arg : "<NONE>"); | |
e74dc197 | 1137 | if (*log_facility_ptr == -1) |
1138 | *log_facility_ptr = (SyslogFacility) value; | |
e9702f7d | 1139 | break; |
1140 | ||
1141 | case sLogLevel: | |
e74dc197 | 1142 | log_level_ptr = &options->log_level; |
e9702f7d | 1143 | arg = strdelim(&cp); |
1144 | value = log_level_number(arg); | |
1145 | if (value == SYSLOG_LEVEL_NOT_SET) | |
1146 | fatal("%.200s line %d: unsupported log level '%s'", | |
1147 | filename, linenum, arg ? arg : "<NONE>"); | |
e74dc197 | 1148 | if (*log_level_ptr == -1) |
1149 | *log_level_ptr = (LogLevel) value; | |
e9702f7d | 1150 | break; |
1151 | ||
1152 | case sAllowTcpForwarding: | |
1153 | intptr = &options->allow_tcp_forwarding; | |
1154 | goto parse_flag; | |
1155 | ||
350391c5 | 1156 | case sUsePrivilegeSeparation: |
1157 | intptr = &use_privsep; | |
1158 | goto parse_flag; | |
1159 | ||
e9702f7d | 1160 | case sAllowUsers: |
1161 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1162 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
1163 | fatal("%s line %d: too many allow users.", | |
3c0ef626 | 1164 | filename, linenum); |
276b07a3 | 1165 | options->allow_users[options->num_allow_users++] = |
1166 | xstrdup(arg); | |
e9702f7d | 1167 | } |
1168 | break; | |
3c0ef626 | 1169 | |
e9702f7d | 1170 | case sDenyUsers: |
1171 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1172 | if (options->num_deny_users >= MAX_DENY_USERS) | |
30460aeb | 1173 | fatal("%s line %d: too many deny users.", |
e9702f7d | 1174 | filename, linenum); |
276b07a3 | 1175 | options->deny_users[options->num_deny_users++] = |
1176 | xstrdup(arg); | |
e9702f7d | 1177 | } |
1178 | break; | |
3c0ef626 | 1179 | |
e9702f7d | 1180 | case sAllowGroups: |
1181 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1182 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
1183 | fatal("%s line %d: too many allow groups.", | |
1184 | filename, linenum); | |
276b07a3 | 1185 | options->allow_groups[options->num_allow_groups++] = |
1186 | xstrdup(arg); | |
e9702f7d | 1187 | } |
1188 | break; | |
1189 | ||
1190 | case sDenyGroups: | |
1191 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1192 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
1193 | fatal("%s line %d: too many deny groups.", | |
1194 | filename, linenum); | |
1195 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
3c0ef626 | 1196 | } |
e9702f7d | 1197 | break; |
1198 | ||
1199 | case sCiphers: | |
1200 | arg = strdelim(&cp); | |
1201 | if (!arg || *arg == '\0') | |
1202 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1203 | if (!ciphers_valid(arg)) | |
1204 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
1205 | filename, linenum, arg ? arg : "<NONE>"); | |
1206 | if (options->ciphers == NULL) | |
1207 | options->ciphers = xstrdup(arg); | |
1208 | break; | |
1209 | ||
1210 | case sMacs: | |
1211 | arg = strdelim(&cp); | |
1212 | if (!arg || *arg == '\0') | |
1213 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1214 | if (!mac_valid(arg)) | |
1215 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
1216 | filename, linenum, arg ? arg : "<NONE>"); | |
1217 | if (options->macs == NULL) | |
1218 | options->macs = xstrdup(arg); | |
1219 | break; | |
1220 | ||
1221 | case sProtocol: | |
1222 | intptr = &options->protocol; | |
1223 | arg = strdelim(&cp); | |
1224 | if (!arg || *arg == '\0') | |
1225 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1226 | value = proto_spec(arg); | |
1227 | if (value == SSH_PROTO_UNKNOWN) | |
1228 | fatal("%s line %d: Bad protocol spec '%s'.", | |
1229 | filename, linenum, arg ? arg : "<NONE>"); | |
1230 | if (*intptr == SSH_PROTO_UNKNOWN) | |
1231 | *intptr = value; | |
1232 | break; | |
1233 | ||
1234 | case sSubsystem: | |
1235 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
1236 | fatal("%s line %d: too many subsystems defined.", | |
1237 | filename, linenum); | |
1238 | } | |
1239 | arg = strdelim(&cp); | |
1240 | if (!arg || *arg == '\0') | |
1241 | fatal("%s line %d: Missing subsystem name.", | |
1242 | filename, linenum); | |
30460aeb | 1243 | if (!*activep) { |
1244 | arg = strdelim(&cp); | |
1245 | break; | |
1246 | } | |
e9702f7d | 1247 | for (i = 0; i < options->num_subsystems; i++) |
1248 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
1249 | fatal("%s line %d: Subsystem '%s' already defined.", | |
1250 | filename, linenum, arg); | |
1251 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
1252 | arg = strdelim(&cp); | |
1253 | if (!arg || *arg == '\0') | |
1254 | fatal("%s line %d: Missing subsystem command.", | |
1255 | filename, linenum); | |
1256 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
30460aeb | 1257 | |
1258 | /* Collect arguments (separate to executable) */ | |
1259 | p = xstrdup(arg); | |
1260 | len = strlen(p) + 1; | |
1261 | while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
1262 | len += 1 + strlen(arg); | |
1263 | p = xrealloc(p, 1, len); | |
1264 | strlcat(p, " ", len); | |
1265 | strlcat(p, arg, len); | |
1266 | } | |
1267 | options->subsystem_args[options->num_subsystems] = p; | |
e9702f7d | 1268 | options->num_subsystems++; |
1269 | break; | |
1270 | ||
1271 | case sMaxStartups: | |
1272 | arg = strdelim(&cp); | |
1273 | if (!arg || *arg == '\0') | |
1274 | fatal("%s line %d: Missing MaxStartups spec.", | |
1275 | filename, linenum); | |
1276 | if ((n = sscanf(arg, "%d:%d:%d", | |
1277 | &options->max_startups_begin, | |
1278 | &options->max_startups_rate, | |
1279 | &options->max_startups)) == 3) { | |
1280 | if (options->max_startups_begin > | |
1281 | options->max_startups || | |
1282 | options->max_startups_rate > 100 || | |
1283 | options->max_startups_rate < 1) | |
1284 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1285 | filename, linenum); | |
1286 | } else if (n != 1) | |
1287 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1288 | filename, linenum); | |
1289 | else | |
1290 | options->max_startups = options->max_startups_begin; | |
1291 | break; | |
1292 | ||
7e82606e | 1293 | case sMaxAuthTries: |
1294 | intptr = &options->max_authtries; | |
1295 | goto parse_int; | |
1296 | ||
e9702f7d | 1297 | case sBanner: |
1298 | charptr = &options->banner; | |
1299 | goto parse_filename; | |
e74dc197 | 1300 | |
e9702f7d | 1301 | /* |
1302 | * These options can contain %X options expanded at | |
1303 | * connect time, so that you can specify paths like: | |
1304 | * | |
1305 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
1306 | */ | |
1307 | case sAuthorizedKeysFile: | |
1308 | case sAuthorizedKeysFile2: | |
30460aeb | 1309 | charptr = (opcode == sAuthorizedKeysFile) ? |
e9702f7d | 1310 | &options->authorized_keys_file : |
1311 | &options->authorized_keys_file2; | |
1312 | goto parse_filename; | |
1313 | ||
1314 | case sClientAliveInterval: | |
1315 | intptr = &options->client_alive_interval; | |
1316 | goto parse_time; | |
1317 | ||
1318 | case sClientAliveCountMax: | |
1319 | intptr = &options->client_alive_count_max; | |
1320 | goto parse_int; | |
1321 | ||
7e82606e | 1322 | case sAcceptEnv: |
1323 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1324 | if (strchr(arg, '=') != NULL) | |
1325 | fatal("%s line %d: Invalid environment name.", | |
1326 | filename, linenum); | |
1327 | if (options->num_accept_env >= MAX_ACCEPT_ENV) | |
1328 | fatal("%s line %d: too many allow env.", | |
1329 | filename, linenum); | |
30460aeb | 1330 | if (!*activep) |
1331 | break; | |
7e82606e | 1332 | options->accept_env[options->num_accept_env++] = |
1333 | xstrdup(arg); | |
1334 | } | |
1335 | break; | |
1336 | ||
08822d99 | 1337 | case sPermitTunnel: |
1338 | intptr = &options->permit_tun; | |
1339 | arg = strdelim(&cp); | |
1340 | if (!arg || *arg == '\0') | |
1341 | fatal("%s line %d: Missing yes/point-to-point/" | |
1342 | "ethernet/no argument.", filename, linenum); | |
1343 | value = 0; /* silence compiler */ | |
1344 | if (strcasecmp(arg, "ethernet") == 0) | |
1345 | value = SSH_TUNMODE_ETHERNET; | |
1346 | else if (strcasecmp(arg, "point-to-point") == 0) | |
1347 | value = SSH_TUNMODE_POINTOPOINT; | |
1348 | else if (strcasecmp(arg, "yes") == 0) | |
1349 | value = SSH_TUNMODE_YES; | |
1350 | else if (strcasecmp(arg, "no") == 0) | |
1351 | value = SSH_TUNMODE_NO; | |
1352 | else | |
1353 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
1354 | "no argument: %s", filename, linenum, arg); | |
1355 | if (*intptr == -1) | |
1356 | *intptr = value; | |
1357 | break; | |
1358 | ||
30460aeb | 1359 | case sMatch: |
1360 | if (cmdline) | |
1361 | fatal("Match directive not supported as a command-line " | |
1362 | "option"); | |
1363 | value = match_cfg_line(&cp, linenum, user, host, address); | |
1364 | if (value < 0) | |
1365 | fatal("%s line %d: Bad Match condition", filename, | |
1366 | linenum); | |
1367 | *activep = value; | |
1368 | break; | |
1369 | ||
1370 | case sPermitOpen: | |
1371 | arg = strdelim(&cp); | |
1372 | if (!arg || *arg == '\0') | |
1373 | fatal("%s line %d: missing PermitOpen specification", | |
1374 | filename, linenum); | |
0b90ac93 | 1375 | n = options->num_permitted_opens; /* modified later */ |
30460aeb | 1376 | if (strcmp(arg, "any") == 0) { |
0b90ac93 | 1377 | if (*activep && n == -1) { |
30460aeb | 1378 | channel_clear_adm_permitted_opens(); |
1379 | options->num_permitted_opens = 0; | |
1380 | } | |
1381 | break; | |
1382 | } | |
0b90ac93 | 1383 | if (*activep && n == -1) |
1384 | channel_clear_adm_permitted_opens(); | |
30460aeb | 1385 | for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { |
1386 | p = hpdelim(&arg); | |
1387 | if (p == NULL) | |
1388 | fatal("%s line %d: missing host in PermitOpen", | |
1389 | filename, linenum); | |
1390 | p = cleanhostname(p); | |
1391 | if (arg == NULL || (port = a2port(arg)) == 0) | |
1392 | fatal("%s line %d: bad port number in " | |
1393 | "PermitOpen", filename, linenum); | |
0b90ac93 | 1394 | if (*activep && n == -1) |
30460aeb | 1395 | options->num_permitted_opens = |
1396 | channel_add_adm_permitted_opens(p, port); | |
30460aeb | 1397 | } |
1398 | break; | |
1399 | ||
1400 | case sForceCommand: | |
1401 | if (cp == NULL) | |
1402 | fatal("%.200s line %d: Missing argument.", filename, | |
1403 | linenum); | |
1404 | len = strspn(cp, WHITESPACE); | |
1405 | if (*activep && options->adm_forced_command == NULL) | |
1406 | options->adm_forced_command = xstrdup(cp + len); | |
1407 | return 0; | |
1408 | ||
e74dc197 | 1409 | case sChrootDirectory: |
1410 | charptr = &options->chroot_directory; | |
1411 | ||
1412 | arg = strdelim(&cp); | |
1413 | if (!arg || *arg == '\0') | |
1414 | fatal("%s line %d: missing file name.", | |
1415 | filename, linenum); | |
1416 | if (*activep && *charptr == NULL) | |
1417 | *charptr = xstrdup(arg); | |
1418 | break; | |
1419 | ||
e9702f7d | 1420 | case sDeprecated: |
7cac2b65 | 1421 | logit("%s line %d: Deprecated option %s", |
1422 | filename, linenum, arg); | |
1423 | while (arg) | |
1424 | arg = strdelim(&cp); | |
1425 | break; | |
1426 | ||
1427 | case sUnsupported: | |
1428 | logit("%s line %d: Unsupported option %s", | |
e9702f7d | 1429 | filename, linenum, arg); |
1430 | while (arg) | |
1431 | arg = strdelim(&cp); | |
1432 | break; | |
1433 | ||
1434 | default: | |
1435 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
1436 | filename, linenum, arg, opcode); | |
1437 | } | |
1438 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
1439 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
1440 | filename, linenum, arg); | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | /* Reads the server configuration file. */ | |
1445 | ||
1446 | void | |
7e82606e | 1447 | load_server_config(const char *filename, Buffer *conf) |
e9702f7d | 1448 | { |
7e82606e | 1449 | char line[1024], *cp; |
276b07a3 | 1450 | FILE *f; |
e9702f7d | 1451 | |
7e82606e | 1452 | debug2("%s: filename %s", __func__, filename); |
1453 | if ((f = fopen(filename, "r")) == NULL) { | |
e9702f7d | 1454 | perror(filename); |
1455 | exit(1); | |
1456 | } | |
7e82606e | 1457 | buffer_clear(conf); |
e9702f7d | 1458 | while (fgets(line, sizeof(line), f)) { |
7e82606e | 1459 | /* |
1460 | * Trim out comments and strip whitespace | |
1461 | * NB - preserve newlines, they are needed to reproduce | |
1462 | * line numbers later for error messages | |
1463 | */ | |
1464 | if ((cp = strchr(line, '#')) != NULL) | |
1465 | memcpy(cp, "\n", 2); | |
1466 | cp = line + strspn(line, " \t\r"); | |
1467 | ||
1468 | buffer_append(conf, cp, strlen(cp)); | |
3c0ef626 | 1469 | } |
7e82606e | 1470 | buffer_append(conf, "\0", 1); |
3c0ef626 | 1471 | fclose(f); |
7e82606e | 1472 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); |
1473 | } | |
1474 | ||
1475 | void | |
30460aeb | 1476 | parse_server_match_config(ServerOptions *options, const char *user, |
1477 | const char *host, const char *address) | |
1478 | { | |
1479 | ServerOptions mo; | |
1480 | ||
1481 | initialize_server_options(&mo); | |
1482 | parse_server_config(&mo, "reprocess config", &cfg, user, host, address); | |
0b90ac93 | 1483 | copy_set_server_options(options, &mo, 0); |
30460aeb | 1484 | } |
1485 | ||
0b90ac93 | 1486 | /* Helper macros */ |
1487 | #define M_CP_INTOPT(n) do {\ | |
1488 | if (src->n != -1) \ | |
1489 | dst->n = src->n; \ | |
1490 | } while (0) | |
1491 | #define M_CP_STROPT(n) do {\ | |
1492 | if (src->n != NULL) { \ | |
1493 | if (dst->n != NULL) \ | |
1494 | xfree(dst->n); \ | |
1495 | dst->n = src->n; \ | |
1496 | } \ | |
1497 | } while(0) | |
1498 | ||
1499 | /* | |
1500 | * Copy any supported values that are set. | |
1501 | * | |
1502 | * If the preauth flag is set, we do not bother copying the the string or | |
1503 | * array values that are not used pre-authentication, because any that we | |
1504 | * do use must be explictly sent in mm_getpwnamallow(). | |
1505 | */ | |
30460aeb | 1506 | void |
0b90ac93 | 1507 | copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) |
30460aeb | 1508 | { |
0b90ac93 | 1509 | M_CP_INTOPT(password_authentication); |
1510 | M_CP_INTOPT(gss_authentication); | |
05ed7e1e | 1511 | M_CP_INTOPT(gss_deleg_creds); |
0b90ac93 | 1512 | M_CP_INTOPT(rsa_authentication); |
1513 | M_CP_INTOPT(pubkey_authentication); | |
1514 | M_CP_INTOPT(kerberos_authentication); | |
1515 | M_CP_INTOPT(hostbased_authentication); | |
1516 | M_CP_INTOPT(kbd_interactive_authentication); | |
e74dc197 | 1517 | M_CP_INTOPT(permit_root_login); |
0b90ac93 | 1518 | |
1519 | M_CP_INTOPT(allow_tcp_forwarding); | |
1520 | M_CP_INTOPT(gateway_ports); | |
1521 | M_CP_INTOPT(x11_display_offset); | |
1522 | M_CP_INTOPT(x11_forwarding); | |
1523 | M_CP_INTOPT(x11_use_localhost); | |
1524 | ||
1525 | M_CP_STROPT(banner); | |
1526 | if (preauth) | |
1527 | return; | |
1528 | M_CP_STROPT(adm_forced_command); | |
e74dc197 | 1529 | M_CP_STROPT(chroot_directory); |
30460aeb | 1530 | } |
1531 | ||
0b90ac93 | 1532 | #undef M_CP_INTOPT |
1533 | #undef M_CP_STROPT | |
1534 | ||
30460aeb | 1535 | void |
1536 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, | |
1537 | const char *user, const char *host, const char *address) | |
7e82606e | 1538 | { |
30460aeb | 1539 | int active, linenum, bad_options = 0; |
7e82606e | 1540 | char *cp, *obuf, *cbuf; |
1541 | ||
1542 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); | |
1543 | ||
1544 | obuf = cbuf = xstrdup(buffer_ptr(conf)); | |
30460aeb | 1545 | active = user ? 0 : 1; |
7e82606e | 1546 | linenum = 1; |
8b32eddc | 1547 | while ((cp = strsep(&cbuf, "\n")) != NULL) { |
7e82606e | 1548 | if (process_server_config_line(options, cp, filename, |
30460aeb | 1549 | linenum++, &active, user, host, address) != 0) |
7e82606e | 1550 | bad_options++; |
1551 | } | |
1552 | xfree(obuf); | |
3c0ef626 | 1553 | if (bad_options > 0) |
1554 | fatal("%s: terminating, %d bad configuration options", | |
1555 | filename, bad_options); | |
1556 | } |