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3c0ef626 | 1 | /* |
2 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
3 | * All rights reserved | |
4 | * | |
5 | * As far as I am concerned, the code I have written for this software | |
6 | * can be used freely for any purpose. Any derived versions of this | |
7 | * software must be clearly marked as such, and if the derived work is | |
8 | * incompatible with the protocol description in the RFC file, it must be | |
9 | * called by a name other than "ssh" or "Secure Shell". | |
10 | */ | |
11 | ||
12 | #include "includes.h" | |
08822d99 | 13 | RCSID("$OpenBSD: servconf.c,v 1.146 2005/12/08 18:34:11 reyk Exp $"); |
3c0ef626 | 14 | |
15 | #include "ssh.h" | |
16 | #include "log.h" | |
17 | #include "servconf.h" | |
18 | #include "xmalloc.h" | |
19 | #include "compat.h" | |
20 | #include "pathnames.h" | |
3c0ef626 | 21 | #include "misc.h" |
22 | #include "cipher.h" | |
23 | #include "kex.h" | |
24 | #include "mac.h" | |
25 | ||
26 | static void add_listen_addr(ServerOptions *, char *, u_short); | |
27 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
28 | ||
350391c5 | 29 | /* Use of privilege separation or not */ |
30 | extern int use_privsep; | |
3c0ef626 | 31 | |
32 | /* Initializes the server options to their default values. */ | |
33 | ||
34 | void | |
35 | initialize_server_options(ServerOptions *options) | |
36 | { | |
37 | memset(options, 0, sizeof(*options)); | |
38 | ||
39 | /* Portable-specific options */ | |
7cac2b65 | 40 | options->use_pam = -1; |
3c0ef626 | 41 | |
42 | /* Standard Options */ | |
43 | options->num_ports = 0; | |
44 | options->ports_from_cmdline = 0; | |
45 | options->listen_addrs = NULL; | |
dfddba3d | 46 | options->address_family = -1; |
3c0ef626 | 47 | options->num_host_key_files = 0; |
48 | options->pid_file = NULL; | |
49 | options->server_key_bits = -1; | |
50 | options->login_grace_time = -1; | |
51 | options->key_regeneration_time = -1; | |
52 | options->permit_root_login = PERMIT_NOT_SET; | |
53 | options->ignore_rhosts = -1; | |
54 | options->ignore_user_known_hosts = -1; | |
55 | options->print_motd = -1; | |
56 | options->print_lastlog = -1; | |
57 | options->x11_forwarding = -1; | |
58 | options->x11_display_offset = -1; | |
e9702f7d | 59 | options->x11_use_localhost = -1; |
3c0ef626 | 60 | options->xauth_location = NULL; |
61 | options->strict_modes = -1; | |
540d72c3 | 62 | options->tcp_keep_alive = -1; |
e9702f7d | 63 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
64 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
3c0ef626 | 65 | options->rhosts_rsa_authentication = -1; |
66 | options->hostbased_authentication = -1; | |
67 | options->hostbased_uses_name_from_packet_only = -1; | |
68 | options->rsa_authentication = -1; | |
69 | options->pubkey_authentication = -1; | |
3c0ef626 | 70 | options->kerberos_authentication = -1; |
71 | options->kerberos_or_local_passwd = -1; | |
72 | options->kerberos_ticket_cleanup = -1; | |
75be3237 | 73 | #ifdef SESSION_HOOKS |
74 | options->session_hooks_allow = -1; | |
75 | options->session_hooks_startup_cmd = NULL; | |
76 | options->session_hooks_shutdown_cmd = NULL; | |
3c0ef626 | 77 | #endif |
540d72c3 | 78 | options->kerberos_get_afs_token = -1; |
7cac2b65 | 79 | options->gss_authentication=-1; |
fe4ad273 | 80 | options->gss_keyex = -1; |
7cac2b65 | 81 | options->gss_cleanup_creds = -1; |
826a9049 | 82 | options->gsi_allow_limited_proxy = -1; |
3c0ef626 | 83 | options->password_authentication = -1; |
84 | options->kbd_interactive_authentication = -1; | |
85 | options->challenge_response_authentication = -1; | |
86 | options->permit_empty_passwd = -1; | |
d03f4262 | 87 | options->permit_user_env = -1; |
3c0ef626 | 88 | options->use_login = -1; |
44a053a3 | 89 | options->compression = -1; |
3c0ef626 | 90 | options->allow_tcp_forwarding = -1; |
91 | options->num_allow_users = 0; | |
92 | options->num_deny_users = 0; | |
93 | options->num_allow_groups = 0; | |
94 | options->num_deny_groups = 0; | |
95 | options->ciphers = NULL; | |
96 | options->macs = NULL; | |
97 | options->protocol = SSH_PROTO_UNKNOWN; | |
98 | options->gateway_ports = -1; | |
99 | options->num_subsystems = 0; | |
100 | options->max_startups_begin = -1; | |
101 | options->max_startups_rate = -1; | |
102 | options->max_startups = -1; | |
7e82606e | 103 | options->max_authtries = -1; |
3c0ef626 | 104 | options->banner = NULL; |
7cac2b65 | 105 | options->use_dns = -1; |
3c0ef626 | 106 | options->client_alive_interval = -1; |
107 | options->client_alive_count_max = -1; | |
108 | options->authorized_keys_file = NULL; | |
109 | options->authorized_keys_file2 = NULL; | |
7e82606e | 110 | options->num_accept_env = 0; |
08822d99 | 111 | options->permit_tun = -1; |
a7213e65 | 112 | options->none_enabled = -1; |
113 | options->tcp_rcv_buf_poll = -1; | |
114 | options->hpn_disabled = -1; | |
115 | options->hpn_buffer_size = -1; | |
350391c5 | 116 | |
117 | /* Needs to be accessable in many places */ | |
118 | use_privsep = -1; | |
3c0ef626 | 119 | } |
120 | ||
121 | void | |
122 | fill_default_server_options(ServerOptions *options) | |
123 | { | |
a7213e65 | 124 | |
3c0ef626 | 125 | /* Portable-specific options */ |
7cac2b65 | 126 | if (options->use_pam == -1) |
29d88157 | 127 | options->use_pam = 0; |
3c0ef626 | 128 | |
129 | /* Standard Options */ | |
130 | if (options->protocol == SSH_PROTO_UNKNOWN) | |
131 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
132 | if (options->num_host_key_files == 0) { | |
133 | /* fill default hostkeys for protocols */ | |
134 | if (options->protocol & SSH_PROTO_1) | |
e9702f7d | 135 | options->host_key_files[options->num_host_key_files++] = |
136 | _PATH_HOST_KEY_FILE; | |
137 | if (options->protocol & SSH_PROTO_2) { | |
138 | options->host_key_files[options->num_host_key_files++] = | |
139 | _PATH_HOST_RSA_KEY_FILE; | |
140 | options->host_key_files[options->num_host_key_files++] = | |
141 | _PATH_HOST_DSA_KEY_FILE; | |
142 | } | |
3c0ef626 | 143 | } |
144 | if (options->num_ports == 0) | |
145 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
146 | if (options->listen_addrs == NULL) | |
147 | add_listen_addr(options, NULL, 0); | |
148 | if (options->pid_file == NULL) | |
149 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; | |
150 | if (options->server_key_bits == -1) | |
151 | options->server_key_bits = 768; | |
152 | if (options->login_grace_time == -1) | |
d03f4262 | 153 | options->login_grace_time = 120; |
3c0ef626 | 154 | if (options->key_regeneration_time == -1) |
155 | options->key_regeneration_time = 3600; | |
156 | if (options->permit_root_login == PERMIT_NOT_SET) | |
157 | options->permit_root_login = PERMIT_YES; | |
158 | if (options->ignore_rhosts == -1) | |
159 | options->ignore_rhosts = 1; | |
160 | if (options->ignore_user_known_hosts == -1) | |
161 | options->ignore_user_known_hosts = 0; | |
162 | if (options->print_motd == -1) | |
163 | options->print_motd = 1; | |
164 | if (options->print_lastlog == -1) | |
165 | options->print_lastlog = 1; | |
166 | if (options->x11_forwarding == -1) | |
167 | options->x11_forwarding = 0; | |
168 | if (options->x11_display_offset == -1) | |
169 | options->x11_display_offset = 10; | |
e9702f7d | 170 | if (options->x11_use_localhost == -1) |
171 | options->x11_use_localhost = 1; | |
3c0ef626 | 172 | if (options->xauth_location == NULL) |
173 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 174 | if (options->strict_modes == -1) |
175 | options->strict_modes = 1; | |
540d72c3 | 176 | if (options->tcp_keep_alive == -1) |
177 | options->tcp_keep_alive = 1; | |
e9702f7d | 178 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
3c0ef626 | 179 | options->log_facility = SYSLOG_FACILITY_AUTH; |
e9702f7d | 180 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 181 | options->log_level = SYSLOG_LEVEL_INFO; |
3c0ef626 | 182 | if (options->rhosts_rsa_authentication == -1) |
183 | options->rhosts_rsa_authentication = 0; | |
184 | if (options->hostbased_authentication == -1) | |
185 | options->hostbased_authentication = 0; | |
186 | if (options->hostbased_uses_name_from_packet_only == -1) | |
187 | options->hostbased_uses_name_from_packet_only = 0; | |
188 | if (options->rsa_authentication == -1) | |
189 | options->rsa_authentication = 1; | |
190 | if (options->pubkey_authentication == -1) | |
191 | options->pubkey_authentication = 1; | |
7cac2b65 | 192 | if (options->kerberos_authentication == -1) |
193 | options->kerberos_authentication = 0; | |
194 | if (options->kerberos_or_local_passwd == -1) | |
195 | options->kerberos_or_local_passwd = 1; | |
196 | if (options->kerberos_ticket_cleanup == -1) | |
197 | options->kerberos_ticket_cleanup = 1; | |
540d72c3 | 198 | if (options->kerberos_get_afs_token == -1) |
199 | options->kerberos_get_afs_token = 0; | |
5598e598 | 200 | if (options->gss_authentication == -1) |
201 | options->gss_authentication = 1; | |
202 | if (options->gss_keyex == -1) | |
7cac2b65 | 203 | options->gss_keyex = 1; |
5598e598 | 204 | if (options->gss_cleanup_creds == -1) |
205 | options->gss_cleanup_creds = 1; | |
826a9049 | 206 | if (options->gsi_allow_limited_proxy == -1) |
207 | options->gsi_allow_limited_proxy = 0; | |
3c0ef626 | 208 | if (options->password_authentication == -1) |
209 | options->password_authentication = 1; | |
210 | if (options->kbd_interactive_authentication == -1) | |
211 | options->kbd_interactive_authentication = 0; | |
212 | if (options->challenge_response_authentication == -1) | |
213 | options->challenge_response_authentication = 1; | |
214 | if (options->permit_empty_passwd == -1) | |
215 | options->permit_empty_passwd = 0; | |
d03f4262 | 216 | if (options->permit_user_env == -1) |
217 | options->permit_user_env = 0; | |
3c0ef626 | 218 | if (options->use_login == -1) |
219 | options->use_login = 0; | |
44a053a3 | 220 | if (options->compression == -1) |
2ce0bfe4 | 221 | options->compression = COMP_DELAYED; |
3c0ef626 | 222 | if (options->allow_tcp_forwarding == -1) |
223 | options->allow_tcp_forwarding = 1; | |
224 | if (options->gateway_ports == -1) | |
225 | options->gateway_ports = 0; | |
226 | if (options->max_startups == -1) | |
227 | options->max_startups = 10; | |
228 | if (options->max_startups_rate == -1) | |
229 | options->max_startups_rate = 100; /* 100% */ | |
230 | if (options->max_startups_begin == -1) | |
231 | options->max_startups_begin = options->max_startups; | |
7e82606e | 232 | if (options->max_authtries == -1) |
233 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; | |
7cac2b65 | 234 | if (options->use_dns == -1) |
235 | options->use_dns = 1; | |
3c0ef626 | 236 | if (options->client_alive_interval == -1) |
e9702f7d | 237 | options->client_alive_interval = 0; |
3c0ef626 | 238 | if (options->client_alive_count_max == -1) |
239 | options->client_alive_count_max = 3; | |
240 | if (options->authorized_keys_file2 == NULL) { | |
241 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
242 | if (options->authorized_keys_file != NULL) | |
243 | options->authorized_keys_file2 = options->authorized_keys_file; | |
244 | else | |
245 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
246 | } | |
247 | if (options->authorized_keys_file == NULL) | |
248 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
08822d99 | 249 | if (options->permit_tun == -1) |
250 | options->permit_tun = SSH_TUNMODE_NO; | |
350391c5 | 251 | |
a7213e65 | 252 | if (options->hpn_disabled == -1) |
253 | options->hpn_disabled = 0; | |
254 | ||
255 | if (options->hpn_buffer_size == -1) | |
256 | options->hpn_buffer_size = 2*1024*1024; | |
257 | else { | |
258 | if (options->hpn_buffer_size == 0) | |
259 | options->hpn_buffer_size = 1; | |
260 | /* limit the maximum buffer to 7MB */ | |
261 | if (options->hpn_buffer_size > 7168) | |
262 | options->hpn_buffer_size = 7168; | |
263 | options->hpn_buffer_size *=1024; | |
264 | } | |
265 | ||
44a053a3 | 266 | /* Turn privilege separation on by default */ |
350391c5 | 267 | if (use_privsep == -1) |
44a053a3 | 268 | use_privsep = 1; |
269 | ||
a7213e65 | 270 | |
271 | ||
d03f4262 | 272 | #ifndef HAVE_MMAP |
44a053a3 | 273 | if (use_privsep && options->compression == 1) { |
274 | error("This platform does not support both privilege " | |
275 | "separation and compression"); | |
276 | error("Compression disabled"); | |
277 | options->compression = 0; | |
278 | } | |
279 | #endif | |
280 | ||
3c0ef626 | 281 | } |
282 | ||
283 | /* Keyword tokens. */ | |
284 | typedef enum { | |
285 | sBadOption, /* == unknown option */ | |
286 | /* Portable-specific options */ | |
7cac2b65 | 287 | sUsePAM, |
3c0ef626 | 288 | /* Standard Options */ |
289 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
290 | sPermitRootLogin, sLogFacility, sLogLevel, | |
7cac2b65 | 291 | sRhostsRSAAuthentication, sRSAAuthentication, |
3c0ef626 | 292 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
540d72c3 | 293 | sKerberosGetAFSToken, |
7cac2b65 | 294 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
75be3237 | 295 | #ifdef SESSION_HOOKS |
296 | sAllowSessionHooks, sSessionHookStartupCmd, sSessionHookShutdownCmd, | |
3c0ef626 | 297 | #endif |
dfddba3d | 298 | sPasswordAuthentication, sKbdInteractiveAuthentication, |
299 | sListenAddress, sAddressFamily, | |
3c0ef626 | 300 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e9702f7d | 301 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
540d72c3 | 302 | sStrictModes, sEmptyPasswd, sTCPKeepAlive, |
d03f4262 | 303 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
3c0ef626 | 304 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
305 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, | |
7e82606e | 306 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, |
307 | sMaxStartups, sMaxAuthTries, | |
7cac2b65 | 308 | sBanner, sUseDNS, sHostbasedAuthentication, |
e9702f7d | 309 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
3c0ef626 | 310 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
a7213e65 | 311 | sGssKeyEx, |
826a9049 | 312 | sGsiAllowLimitedProxy, |
a7213e65 | 313 | sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel, |
314 | sUsePrivilegeSeparation, sNoneEnabled, sTcpRcvBufPoll, | |
315 | sHPNDisabled, sHPNBufferSize, | |
7cac2b65 | 316 | sDeprecated, sUnsupported |
3c0ef626 | 317 | } ServerOpCodes; |
318 | ||
319 | /* Textual representation of the tokens. */ | |
320 | static struct { | |
321 | const char *name; | |
322 | ServerOpCodes opcode; | |
323 | } keywords[] = { | |
324 | /* Portable-specific options */ | |
7cac2b65 | 325 | #ifdef USE_PAM |
326 | { "usepam", sUsePAM }, | |
327 | #else | |
328 | { "usepam", sUnsupported }, | |
329 | #endif | |
330 | { "pamauthenticationviakbdint", sDeprecated }, | |
3c0ef626 | 331 | /* Standard Options */ |
332 | { "port", sPort }, | |
333 | { "hostkey", sHostKeyFile }, | |
334 | { "hostdsakey", sHostKeyFile }, /* alias */ | |
335 | { "pidfile", sPidFile }, | |
336 | { "serverkeybits", sServerKeyBits }, | |
337 | { "logingracetime", sLoginGraceTime }, | |
338 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
339 | { "permitrootlogin", sPermitRootLogin }, | |
340 | { "syslogfacility", sLogFacility }, | |
341 | { "loglevel", sLogLevel }, | |
7cac2b65 | 342 | { "rhostsauthentication", sDeprecated }, |
3c0ef626 | 343 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, |
344 | { "hostbasedauthentication", sHostbasedAuthentication }, | |
345 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, | |
346 | { "rsaauthentication", sRSAAuthentication }, | |
347 | { "pubkeyauthentication", sPubkeyAuthentication }, | |
348 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
7cac2b65 | 349 | #ifdef KRB5 |
350 | { "kerberosauthentication", sKerberosAuthentication }, | |
351 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
352 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
540d72c3 | 353 | #ifdef USE_AFS |
354 | { "kerberosgetafstoken", sKerberosGetAFSToken }, | |
355 | #else | |
356 | { "kerberosgetafstoken", sUnsupported }, | |
357 | #endif | |
7cac2b65 | 358 | #else |
359 | { "kerberosauthentication", sUnsupported }, | |
360 | { "kerberosorlocalpasswd", sUnsupported }, | |
361 | { "kerberosticketcleanup", sUnsupported }, | |
540d72c3 | 362 | { "kerberosgetafstoken", sUnsupported }, |
7cac2b65 | 363 | #endif |
364 | { "kerberostgtpassing", sUnsupported }, | |
365 | { "afstokenpassing", sUnsupported }, | |
5598e598 | 366 | #ifdef GSSAPI |
367 | { "gssapiauthentication", sGssAuthentication }, | |
368 | { "gssapikeyexchange", sGssKeyEx }, | |
540d72c3 | 369 | { "gssapicleanupcredentials", sGssCleanupCreds }, |
826a9049 | 370 | #ifdef GSI |
371 | { "gsiallowlimitedproxy", sGsiAllowLimitedProxy }, | |
372 | #endif | |
7cac2b65 | 373 | #else |
374 | { "gssapiauthentication", sUnsupported }, | |
375 | { "gssapikeyexchange", sUnsupported }, | |
540d72c3 | 376 | { "gssapicleanupcredentials", sUnsupported }, |
3c0ef626 | 377 | #endif |
75be3237 | 378 | #ifdef SESSION_HOOKS |
379 | { "allowsessionhooks", sAllowSessionHooks }, | |
380 | { "sessionhookstartupcmd", sSessionHookStartupCmd }, | |
381 | { "sessionhookshutdowncmd", sSessionHookShutdownCmd }, | |
382 | #endif | |
3c0ef626 | 383 | { "passwordauthentication", sPasswordAuthentication }, |
384 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, | |
385 | { "challengeresponseauthentication", sChallengeResponseAuthentication }, | |
386 | { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ | |
387 | { "checkmail", sDeprecated }, | |
388 | { "listenaddress", sListenAddress }, | |
dfddba3d | 389 | { "addressfamily", sAddressFamily }, |
3c0ef626 | 390 | { "printmotd", sPrintMotd }, |
391 | { "printlastlog", sPrintLastLog }, | |
392 | { "ignorerhosts", sIgnoreRhosts }, | |
393 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
394 | { "x11forwarding", sX11Forwarding }, | |
395 | { "x11displayoffset", sX11DisplayOffset }, | |
e9702f7d | 396 | { "x11uselocalhost", sX11UseLocalhost }, |
3c0ef626 | 397 | { "xauthlocation", sXAuthLocation }, |
398 | { "strictmodes", sStrictModes }, | |
399 | { "permitemptypasswords", sEmptyPasswd }, | |
d03f4262 | 400 | { "permituserenvironment", sPermitUserEnvironment }, |
3c0ef626 | 401 | { "uselogin", sUseLogin }, |
44a053a3 | 402 | { "compression", sCompression }, |
540d72c3 | 403 | { "tcpkeepalive", sTCPKeepAlive }, |
404 | { "keepalive", sTCPKeepAlive }, /* obsolete alias */ | |
3c0ef626 | 405 | { "allowtcpforwarding", sAllowTcpForwarding }, |
406 | { "allowusers", sAllowUsers }, | |
407 | { "denyusers", sDenyUsers }, | |
408 | { "allowgroups", sAllowGroups }, | |
409 | { "denygroups", sDenyGroups }, | |
410 | { "ciphers", sCiphers }, | |
411 | { "macs", sMacs }, | |
412 | { "protocol", sProtocol }, | |
413 | { "gatewayports", sGatewayPorts }, | |
414 | { "subsystem", sSubsystem }, | |
415 | { "maxstartups", sMaxStartups }, | |
7e82606e | 416 | { "maxauthtries", sMaxAuthTries }, |
3c0ef626 | 417 | { "banner", sBanner }, |
7cac2b65 | 418 | { "usedns", sUseDNS }, |
419 | { "verifyreversemapping", sDeprecated }, | |
420 | { "reversemappingcheck", sDeprecated }, | |
3c0ef626 | 421 | { "clientaliveinterval", sClientAliveInterval }, |
422 | { "clientalivecountmax", sClientAliveCountMax }, | |
423 | { "authorizedkeysfile", sAuthorizedKeysFile }, | |
424 | { "authorizedkeysfile2", sAuthorizedKeysFile2 }, | |
350391c5 | 425 | { "useprivilegeseparation", sUsePrivilegeSeparation}, |
7e82606e | 426 | { "acceptenv", sAcceptEnv }, |
a7213e65 | 427 | { "noneenabled", sNoneEnabled }, |
428 | { "hpndisabled", sHPNDisabled }, | |
429 | { "hpnbuffersize", sHPNBufferSize }, | |
430 | { "tcprcvbufpoll", sTcpRcvBufPoll }, | |
08822d99 | 431 | { "permittunnel", sPermitTunnel }, |
e9702f7d | 432 | { NULL, sBadOption } |
3c0ef626 | 433 | }; |
434 | ||
435 | /* | |
436 | * Returns the number of the token pointed to by cp or sBadOption. | |
437 | */ | |
438 | ||
439 | static ServerOpCodes | |
440 | parse_token(const char *cp, const char *filename, | |
441 | int linenum) | |
442 | { | |
443 | u_int i; | |
444 | ||
445 | for (i = 0; keywords[i].name; i++) | |
a7213e65 | 446 | if (strcasecmp(cp, keywords[i].name) == 0){ |
447 | debug ("TOKEN IS %s", keywords[i].name); | |
448 | return keywords[i].opcode;} | |
3c0ef626 | 449 | error("%s: line %d: Bad configuration option: %s", |
450 | filename, linenum, cp); | |
451 | return sBadOption; | |
452 | } | |
453 | ||
454 | static void | |
455 | add_listen_addr(ServerOptions *options, char *addr, u_short port) | |
456 | { | |
2ce0bfe4 | 457 | u_int i; |
3c0ef626 | 458 | |
459 | if (options->num_ports == 0) | |
460 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
dfddba3d | 461 | if (options->address_family == -1) |
462 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 463 | if (port == 0) |
464 | for (i = 0; i < options->num_ports; i++) | |
465 | add_one_listen_addr(options, addr, options->ports[i]); | |
466 | else | |
467 | add_one_listen_addr(options, addr, port); | |
468 | } | |
469 | ||
470 | static void | |
471 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) | |
472 | { | |
473 | struct addrinfo hints, *ai, *aitop; | |
474 | char strport[NI_MAXSERV]; | |
475 | int gaierr; | |
476 | ||
477 | memset(&hints, 0, sizeof(hints)); | |
dfddba3d | 478 | hints.ai_family = options->address_family; |
3c0ef626 | 479 | hints.ai_socktype = SOCK_STREAM; |
480 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
276b07a3 | 481 | snprintf(strport, sizeof strport, "%u", port); |
3c0ef626 | 482 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
483 | fatal("bad addr or host: %s (%s)", | |
484 | addr ? addr : "<NULL>", | |
485 | gai_strerror(gaierr)); | |
486 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
487 | ; | |
488 | ai->ai_next = options->listen_addrs; | |
489 | options->listen_addrs = aitop; | |
490 | } | |
491 | ||
e9702f7d | 492 | int |
493 | process_server_config_line(ServerOptions *options, char *line, | |
494 | const char *filename, int linenum) | |
3c0ef626 | 495 | { |
3c0ef626 | 496 | char *cp, **charptr, *arg, *p; |
2ce0bfe4 | 497 | int *intptr, value, n; |
3c0ef626 | 498 | ServerOpCodes opcode; |
dfddba3d | 499 | u_short port; |
2ce0bfe4 | 500 | u_int i; |
3c0ef626 | 501 | |
e9702f7d | 502 | cp = line; |
503 | arg = strdelim(&cp); | |
504 | /* Ignore leading whitespace */ | |
505 | if (*arg == '\0') | |
3c0ef626 | 506 | arg = strdelim(&cp); |
e9702f7d | 507 | if (!arg || !*arg || *arg == '#') |
508 | return 0; | |
509 | intptr = NULL; | |
510 | charptr = NULL; | |
511 | opcode = parse_token(arg, filename, linenum); | |
a7213e65 | 512 | |
e9702f7d | 513 | switch (opcode) { |
514 | /* Portable-specific options */ | |
7cac2b65 | 515 | case sUsePAM: |
516 | intptr = &options->use_pam; | |
e9702f7d | 517 | goto parse_flag; |
3c0ef626 | 518 | |
e9702f7d | 519 | /* Standard Options */ |
520 | case sBadOption: | |
521 | return -1; | |
522 | case sPort: | |
523 | /* ignore ports from configfile if cmdline specifies ports */ | |
524 | if (options->ports_from_cmdline) | |
525 | return 0; | |
526 | if (options->listen_addrs != NULL) | |
527 | fatal("%s line %d: ports must be specified before " | |
528 | "ListenAddress.", filename, linenum); | |
529 | if (options->num_ports >= MAX_PORTS) | |
530 | fatal("%s line %d: too many ports.", | |
531 | filename, linenum); | |
532 | arg = strdelim(&cp); | |
533 | if (!arg || *arg == '\0') | |
534 | fatal("%s line %d: missing port number.", | |
535 | filename, linenum); | |
536 | options->ports[options->num_ports++] = a2port(arg); | |
537 | if (options->ports[options->num_ports-1] == 0) | |
538 | fatal("%s line %d: Badly formatted port number.", | |
539 | filename, linenum); | |
540 | break; | |
541 | ||
542 | case sServerKeyBits: | |
543 | intptr = &options->server_key_bits; | |
3c0ef626 | 544 | parse_int: |
e9702f7d | 545 | arg = strdelim(&cp); |
546 | if (!arg || *arg == '\0') | |
547 | fatal("%s line %d: missing integer value.", | |
548 | filename, linenum); | |
549 | value = atoi(arg); | |
550 | if (*intptr == -1) | |
551 | *intptr = value; | |
552 | break; | |
553 | ||
554 | case sLoginGraceTime: | |
555 | intptr = &options->login_grace_time; | |
3c0ef626 | 556 | parse_time: |
e9702f7d | 557 | arg = strdelim(&cp); |
558 | if (!arg || *arg == '\0') | |
559 | fatal("%s line %d: missing time value.", | |
560 | filename, linenum); | |
561 | if ((value = convtime(arg)) == -1) | |
562 | fatal("%s line %d: invalid time value.", | |
563 | filename, linenum); | |
564 | if (*intptr == -1) | |
565 | *intptr = value; | |
566 | break; | |
567 | ||
568 | case sKeyRegenerationTime: | |
569 | intptr = &options->key_regeneration_time; | |
570 | goto parse_time; | |
571 | ||
572 | case sListenAddress: | |
573 | arg = strdelim(&cp); | |
dfddba3d | 574 | if (arg == NULL || *arg == '\0') |
575 | fatal("%s line %d: missing address", | |
e9702f7d | 576 | filename, linenum); |
2ce0bfe4 | 577 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ |
578 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL | |
579 | && strchr(p+1, ':') != NULL) { | |
580 | add_listen_addr(options, arg, 0); | |
581 | break; | |
582 | } | |
dfddba3d | 583 | p = hpdelim(&arg); |
584 | if (p == NULL) | |
585 | fatal("%s line %d: bad address:port usage", | |
e9702f7d | 586 | filename, linenum); |
dfddba3d | 587 | p = cleanhostname(p); |
588 | if (arg == NULL) | |
589 | port = 0; | |
590 | else if ((port = a2port(arg)) == 0) | |
591 | fatal("%s line %d: bad port number", filename, linenum); | |
592 | ||
593 | add_listen_addr(options, p, port); | |
594 | ||
595 | break; | |
596 | ||
597 | case sAddressFamily: | |
598 | arg = strdelim(&cp); | |
2ce0bfe4 | 599 | if (!arg || *arg == '\0') |
600 | fatal("%s line %d: missing address family.", | |
601 | filename, linenum); | |
dfddba3d | 602 | intptr = &options->address_family; |
603 | if (options->listen_addrs != NULL) | |
604 | fatal("%s line %d: address family must be specified before " | |
605 | "ListenAddress.", filename, linenum); | |
606 | if (strcasecmp(arg, "inet") == 0) | |
607 | value = AF_INET; | |
608 | else if (strcasecmp(arg, "inet6") == 0) | |
609 | value = AF_INET6; | |
610 | else if (strcasecmp(arg, "any") == 0) | |
611 | value = AF_UNSPEC; | |
612 | else | |
613 | fatal("%s line %d: unsupported address family \"%s\".", | |
614 | filename, linenum, arg); | |
615 | if (*intptr == -1) | |
616 | *intptr = value; | |
e9702f7d | 617 | break; |
618 | ||
619 | case sHostKeyFile: | |
620 | intptr = &options->num_host_key_files; | |
621 | if (*intptr >= MAX_HOSTKEYS) | |
622 | fatal("%s line %d: too many host keys specified (max %d).", | |
623 | filename, linenum, MAX_HOSTKEYS); | |
624 | charptr = &options->host_key_files[*intptr]; | |
3c0ef626 | 625 | parse_filename: |
e9702f7d | 626 | arg = strdelim(&cp); |
627 | if (!arg || *arg == '\0') | |
628 | fatal("%s line %d: missing file name.", | |
629 | filename, linenum); | |
630 | if (*charptr == NULL) { | |
631 | *charptr = tilde_expand_filename(arg, getuid()); | |
632 | /* increase optional counter */ | |
633 | if (intptr != NULL) | |
634 | *intptr = *intptr + 1; | |
635 | } | |
636 | break; | |
3c0ef626 | 637 | |
e9702f7d | 638 | case sPidFile: |
639 | charptr = &options->pid_file; | |
640 | goto parse_filename; | |
3c0ef626 | 641 | |
e9702f7d | 642 | case sPermitRootLogin: |
643 | intptr = &options->permit_root_login; | |
644 | arg = strdelim(&cp); | |
645 | if (!arg || *arg == '\0') | |
646 | fatal("%s line %d: missing yes/" | |
647 | "without-password/forced-commands-only/no " | |
648 | "argument.", filename, linenum); | |
649 | value = 0; /* silence compiler */ | |
650 | if (strcmp(arg, "without-password") == 0) | |
651 | value = PERMIT_NO_PASSWD; | |
652 | else if (strcmp(arg, "forced-commands-only") == 0) | |
653 | value = PERMIT_FORCED_ONLY; | |
654 | else if (strcmp(arg, "yes") == 0) | |
655 | value = PERMIT_YES; | |
656 | else if (strcmp(arg, "no") == 0) | |
657 | value = PERMIT_NO; | |
658 | else | |
659 | fatal("%s line %d: Bad yes/" | |
660 | "without-password/forced-commands-only/no " | |
661 | "argument: %s", filename, linenum, arg); | |
662 | if (*intptr == -1) | |
663 | *intptr = value; | |
664 | break; | |
3c0ef626 | 665 | |
e9702f7d | 666 | case sIgnoreRhosts: |
667 | intptr = &options->ignore_rhosts; | |
668 | parse_flag: | |
669 | arg = strdelim(&cp); | |
670 | if (!arg || *arg == '\0') | |
671 | fatal("%s line %d: missing yes/no argument.", | |
672 | filename, linenum); | |
673 | value = 0; /* silence compiler */ | |
674 | if (strcmp(arg, "yes") == 0) | |
675 | value = 1; | |
676 | else if (strcmp(arg, "no") == 0) | |
677 | value = 0; | |
678 | else | |
679 | fatal("%s line %d: Bad yes/no argument: %s", | |
680 | filename, linenum, arg); | |
681 | if (*intptr == -1) | |
682 | *intptr = value; | |
683 | break; | |
684 | ||
a7213e65 | 685 | case sNoneEnabled: |
686 | intptr = &options->none_enabled; | |
687 | goto parse_flag; | |
688 | ||
689 | case sTcpRcvBufPoll: | |
690 | intptr = &options->tcp_rcv_buf_poll; | |
691 | goto parse_flag; | |
692 | ||
693 | case sHPNDisabled: | |
694 | intptr = &options->hpn_disabled; | |
695 | goto parse_flag; | |
696 | ||
697 | case sHPNBufferSize: | |
698 | intptr = &options->hpn_buffer_size; | |
699 | goto parse_int; | |
700 | ||
e9702f7d | 701 | case sIgnoreUserKnownHosts: |
702 | intptr = &options->ignore_user_known_hosts; | |
703 | goto parse_flag; | |
704 | ||
e9702f7d | 705 | case sRhostsRSAAuthentication: |
706 | intptr = &options->rhosts_rsa_authentication; | |
707 | goto parse_flag; | |
708 | ||
709 | case sHostbasedAuthentication: | |
710 | intptr = &options->hostbased_authentication; | |
711 | goto parse_flag; | |
712 | ||
713 | case sHostbasedUsesNameFromPacketOnly: | |
714 | intptr = &options->hostbased_uses_name_from_packet_only; | |
715 | goto parse_flag; | |
716 | ||
717 | case sRSAAuthentication: | |
718 | intptr = &options->rsa_authentication; | |
719 | goto parse_flag; | |
720 | ||
721 | case sPubkeyAuthentication: | |
722 | intptr = &options->pubkey_authentication; | |
723 | goto parse_flag; | |
7cac2b65 | 724 | |
e9702f7d | 725 | case sKerberosAuthentication: |
726 | intptr = &options->kerberos_authentication; | |
727 | goto parse_flag; | |
3c0ef626 | 728 | |
e9702f7d | 729 | case sKerberosOrLocalPasswd: |
730 | intptr = &options->kerberos_or_local_passwd; | |
731 | goto parse_flag; | |
3c0ef626 | 732 | |
e9702f7d | 733 | case sKerberosTicketCleanup: |
734 | intptr = &options->kerberos_ticket_cleanup; | |
735 | goto parse_flag; | |
7cac2b65 | 736 | |
540d72c3 | 737 | case sKerberosGetAFSToken: |
738 | intptr = &options->kerberos_get_afs_token; | |
739 | goto parse_flag; | |
740 | ||
7cac2b65 | 741 | case sGssAuthentication: |
742 | intptr = &options->gss_authentication; | |
e9702f7d | 743 | goto parse_flag; |
7cac2b65 | 744 | |
745 | case sGssKeyEx: | |
746 | intptr = &options->gss_keyex; | |
e9702f7d | 747 | goto parse_flag; |
7cac2b65 | 748 | |
7cac2b65 | 749 | case sGssCleanupCreds: |
750 | intptr = &options->gss_cleanup_creds; | |
751 | goto parse_flag; | |
752 | ||
826a9049 | 753 | case sGsiAllowLimitedProxy: |
754 | intptr = &options->gsi_allow_limited_proxy; | |
755 | goto parse_flag; | |
756 | ||
75be3237 | 757 | #ifdef SESSION_HOOKS |
758 | case sAllowSessionHooks: | |
759 | intptr = &options->session_hooks_allow; | |
760 | goto parse_flag; | |
761 | case sSessionHookStartupCmd: | |
762 | case sSessionHookShutdownCmd: | |
763 | arg = strdelim(&cp); | |
764 | if (!arg || *arg == '\0') | |
765 | fatal("%s line %d: empty session hook command", | |
766 | filename, linenum); | |
767 | if (opcode==sSessionHookStartupCmd) | |
768 | options->session_hooks_startup_cmd = strdup(arg); | |
769 | else | |
770 | options->session_hooks_shutdown_cmd = strdup(arg); | |
771 | break; | |
772 | #endif | |
7cac2b65 | 773 | |
e9702f7d | 774 | case sPasswordAuthentication: |
775 | intptr = &options->password_authentication; | |
776 | goto parse_flag; | |
3c0ef626 | 777 | |
e9702f7d | 778 | case sKbdInteractiveAuthentication: |
779 | intptr = &options->kbd_interactive_authentication; | |
780 | goto parse_flag; | |
3c0ef626 | 781 | |
e9702f7d | 782 | case sChallengeResponseAuthentication: |
783 | intptr = &options->challenge_response_authentication; | |
784 | goto parse_flag; | |
3c0ef626 | 785 | |
e9702f7d | 786 | case sPrintMotd: |
787 | intptr = &options->print_motd; | |
788 | goto parse_flag; | |
3c0ef626 | 789 | |
e9702f7d | 790 | case sPrintLastLog: |
791 | intptr = &options->print_lastlog; | |
792 | goto parse_flag; | |
3c0ef626 | 793 | |
e9702f7d | 794 | case sX11Forwarding: |
795 | intptr = &options->x11_forwarding; | |
796 | goto parse_flag; | |
3c0ef626 | 797 | |
e9702f7d | 798 | case sX11DisplayOffset: |
799 | intptr = &options->x11_display_offset; | |
800 | goto parse_int; | |
3c0ef626 | 801 | |
e9702f7d | 802 | case sX11UseLocalhost: |
803 | intptr = &options->x11_use_localhost; | |
804 | goto parse_flag; | |
3c0ef626 | 805 | |
e9702f7d | 806 | case sXAuthLocation: |
807 | charptr = &options->xauth_location; | |
808 | goto parse_filename; | |
3c0ef626 | 809 | |
e9702f7d | 810 | case sStrictModes: |
811 | intptr = &options->strict_modes; | |
812 | goto parse_flag; | |
3c0ef626 | 813 | |
540d72c3 | 814 | case sTCPKeepAlive: |
815 | intptr = &options->tcp_keep_alive; | |
e9702f7d | 816 | goto parse_flag; |
3c0ef626 | 817 | |
e9702f7d | 818 | case sEmptyPasswd: |
819 | intptr = &options->permit_empty_passwd; | |
820 | goto parse_flag; | |
821 | ||
d03f4262 | 822 | case sPermitUserEnvironment: |
823 | intptr = &options->permit_user_env; | |
824 | goto parse_flag; | |
825 | ||
e9702f7d | 826 | case sUseLogin: |
827 | intptr = &options->use_login; | |
828 | goto parse_flag; | |
829 | ||
44a053a3 | 830 | case sCompression: |
831 | intptr = &options->compression; | |
2ce0bfe4 | 832 | arg = strdelim(&cp); |
833 | if (!arg || *arg == '\0') | |
834 | fatal("%s line %d: missing yes/no/delayed " | |
835 | "argument.", filename, linenum); | |
836 | value = 0; /* silence compiler */ | |
837 | if (strcmp(arg, "delayed") == 0) | |
838 | value = COMP_DELAYED; | |
839 | else if (strcmp(arg, "yes") == 0) | |
840 | value = COMP_ZLIB; | |
841 | else if (strcmp(arg, "no") == 0) | |
842 | value = COMP_NONE; | |
843 | else | |
844 | fatal("%s line %d: Bad yes/no/delayed " | |
845 | "argument: %s", filename, linenum, arg); | |
846 | if (*intptr == -1) | |
847 | *intptr = value; | |
848 | break; | |
44a053a3 | 849 | |
e9702f7d | 850 | case sGatewayPorts: |
851 | intptr = &options->gateway_ports; | |
dfddba3d | 852 | arg = strdelim(&cp); |
853 | if (!arg || *arg == '\0') | |
854 | fatal("%s line %d: missing yes/no/clientspecified " | |
855 | "argument.", filename, linenum); | |
856 | value = 0; /* silence compiler */ | |
857 | if (strcmp(arg, "clientspecified") == 0) | |
858 | value = 2; | |
859 | else if (strcmp(arg, "yes") == 0) | |
860 | value = 1; | |
861 | else if (strcmp(arg, "no") == 0) | |
862 | value = 0; | |
863 | else | |
864 | fatal("%s line %d: Bad yes/no/clientspecified " | |
865 | "argument: %s", filename, linenum, arg); | |
866 | if (*intptr == -1) | |
867 | *intptr = value; | |
868 | break; | |
e9702f7d | 869 | |
7cac2b65 | 870 | case sUseDNS: |
871 | intptr = &options->use_dns; | |
e9702f7d | 872 | goto parse_flag; |
873 | ||
874 | case sLogFacility: | |
875 | intptr = (int *) &options->log_facility; | |
876 | arg = strdelim(&cp); | |
877 | value = log_facility_number(arg); | |
878 | if (value == SYSLOG_FACILITY_NOT_SET) | |
879 | fatal("%.200s line %d: unsupported log facility '%s'", | |
880 | filename, linenum, arg ? arg : "<NONE>"); | |
881 | if (*intptr == -1) | |
882 | *intptr = (SyslogFacility) value; | |
883 | break; | |
884 | ||
885 | case sLogLevel: | |
886 | intptr = (int *) &options->log_level; | |
887 | arg = strdelim(&cp); | |
888 | value = log_level_number(arg); | |
889 | if (value == SYSLOG_LEVEL_NOT_SET) | |
890 | fatal("%.200s line %d: unsupported log level '%s'", | |
891 | filename, linenum, arg ? arg : "<NONE>"); | |
892 | if (*intptr == -1) | |
893 | *intptr = (LogLevel) value; | |
894 | break; | |
895 | ||
896 | case sAllowTcpForwarding: | |
897 | intptr = &options->allow_tcp_forwarding; | |
898 | goto parse_flag; | |
899 | ||
350391c5 | 900 | case sUsePrivilegeSeparation: |
901 | intptr = &use_privsep; | |
902 | goto parse_flag; | |
903 | ||
e9702f7d | 904 | case sAllowUsers: |
905 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
906 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
907 | fatal("%s line %d: too many allow users.", | |
3c0ef626 | 908 | filename, linenum); |
276b07a3 | 909 | options->allow_users[options->num_allow_users++] = |
910 | xstrdup(arg); | |
e9702f7d | 911 | } |
912 | break; | |
3c0ef626 | 913 | |
e9702f7d | 914 | case sDenyUsers: |
915 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
916 | if (options->num_deny_users >= MAX_DENY_USERS) | |
917 | fatal( "%s line %d: too many deny users.", | |
918 | filename, linenum); | |
276b07a3 | 919 | options->deny_users[options->num_deny_users++] = |
920 | xstrdup(arg); | |
e9702f7d | 921 | } |
922 | break; | |
3c0ef626 | 923 | |
e9702f7d | 924 | case sAllowGroups: |
925 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
926 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
927 | fatal("%s line %d: too many allow groups.", | |
928 | filename, linenum); | |
276b07a3 | 929 | options->allow_groups[options->num_allow_groups++] = |
930 | xstrdup(arg); | |
e9702f7d | 931 | } |
932 | break; | |
933 | ||
934 | case sDenyGroups: | |
935 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
936 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
937 | fatal("%s line %d: too many deny groups.", | |
938 | filename, linenum); | |
939 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
3c0ef626 | 940 | } |
e9702f7d | 941 | break; |
942 | ||
943 | case sCiphers: | |
944 | arg = strdelim(&cp); | |
945 | if (!arg || *arg == '\0') | |
946 | fatal("%s line %d: Missing argument.", filename, linenum); | |
947 | if (!ciphers_valid(arg)) | |
948 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
949 | filename, linenum, arg ? arg : "<NONE>"); | |
950 | if (options->ciphers == NULL) | |
951 | options->ciphers = xstrdup(arg); | |
952 | break; | |
953 | ||
954 | case sMacs: | |
955 | arg = strdelim(&cp); | |
956 | if (!arg || *arg == '\0') | |
957 | fatal("%s line %d: Missing argument.", filename, linenum); | |
958 | if (!mac_valid(arg)) | |
959 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
960 | filename, linenum, arg ? arg : "<NONE>"); | |
961 | if (options->macs == NULL) | |
962 | options->macs = xstrdup(arg); | |
963 | break; | |
964 | ||
965 | case sProtocol: | |
966 | intptr = &options->protocol; | |
967 | arg = strdelim(&cp); | |
968 | if (!arg || *arg == '\0') | |
969 | fatal("%s line %d: Missing argument.", filename, linenum); | |
970 | value = proto_spec(arg); | |
971 | if (value == SSH_PROTO_UNKNOWN) | |
972 | fatal("%s line %d: Bad protocol spec '%s'.", | |
973 | filename, linenum, arg ? arg : "<NONE>"); | |
974 | if (*intptr == SSH_PROTO_UNKNOWN) | |
975 | *intptr = value; | |
976 | break; | |
977 | ||
978 | case sSubsystem: | |
979 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
980 | fatal("%s line %d: too many subsystems defined.", | |
981 | filename, linenum); | |
982 | } | |
983 | arg = strdelim(&cp); | |
984 | if (!arg || *arg == '\0') | |
985 | fatal("%s line %d: Missing subsystem name.", | |
986 | filename, linenum); | |
987 | for (i = 0; i < options->num_subsystems; i++) | |
988 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
989 | fatal("%s line %d: Subsystem '%s' already defined.", | |
990 | filename, linenum, arg); | |
991 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
992 | arg = strdelim(&cp); | |
993 | if (!arg || *arg == '\0') | |
994 | fatal("%s line %d: Missing subsystem command.", | |
995 | filename, linenum); | |
996 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
997 | options->num_subsystems++; | |
998 | break; | |
999 | ||
1000 | case sMaxStartups: | |
1001 | arg = strdelim(&cp); | |
1002 | if (!arg || *arg == '\0') | |
1003 | fatal("%s line %d: Missing MaxStartups spec.", | |
1004 | filename, linenum); | |
1005 | if ((n = sscanf(arg, "%d:%d:%d", | |
1006 | &options->max_startups_begin, | |
1007 | &options->max_startups_rate, | |
1008 | &options->max_startups)) == 3) { | |
1009 | if (options->max_startups_begin > | |
1010 | options->max_startups || | |
1011 | options->max_startups_rate > 100 || | |
1012 | options->max_startups_rate < 1) | |
1013 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1014 | filename, linenum); | |
1015 | } else if (n != 1) | |
1016 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1017 | filename, linenum); | |
1018 | else | |
1019 | options->max_startups = options->max_startups_begin; | |
1020 | break; | |
1021 | ||
7e82606e | 1022 | case sMaxAuthTries: |
1023 | intptr = &options->max_authtries; | |
1024 | goto parse_int; | |
1025 | ||
e9702f7d | 1026 | case sBanner: |
1027 | charptr = &options->banner; | |
1028 | goto parse_filename; | |
1029 | /* | |
1030 | * These options can contain %X options expanded at | |
1031 | * connect time, so that you can specify paths like: | |
1032 | * | |
1033 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
1034 | */ | |
1035 | case sAuthorizedKeysFile: | |
1036 | case sAuthorizedKeysFile2: | |
1037 | charptr = (opcode == sAuthorizedKeysFile ) ? | |
1038 | &options->authorized_keys_file : | |
1039 | &options->authorized_keys_file2; | |
1040 | goto parse_filename; | |
1041 | ||
1042 | case sClientAliveInterval: | |
1043 | intptr = &options->client_alive_interval; | |
1044 | goto parse_time; | |
1045 | ||
1046 | case sClientAliveCountMax: | |
1047 | intptr = &options->client_alive_count_max; | |
1048 | goto parse_int; | |
1049 | ||
7e82606e | 1050 | case sAcceptEnv: |
1051 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1052 | if (strchr(arg, '=') != NULL) | |
1053 | fatal("%s line %d: Invalid environment name.", | |
1054 | filename, linenum); | |
1055 | if (options->num_accept_env >= MAX_ACCEPT_ENV) | |
1056 | fatal("%s line %d: too many allow env.", | |
1057 | filename, linenum); | |
1058 | options->accept_env[options->num_accept_env++] = | |
1059 | xstrdup(arg); | |
1060 | } | |
1061 | break; | |
1062 | ||
08822d99 | 1063 | case sPermitTunnel: |
1064 | intptr = &options->permit_tun; | |
1065 | arg = strdelim(&cp); | |
1066 | if (!arg || *arg == '\0') | |
1067 | fatal("%s line %d: Missing yes/point-to-point/" | |
1068 | "ethernet/no argument.", filename, linenum); | |
1069 | value = 0; /* silence compiler */ | |
1070 | if (strcasecmp(arg, "ethernet") == 0) | |
1071 | value = SSH_TUNMODE_ETHERNET; | |
1072 | else if (strcasecmp(arg, "point-to-point") == 0) | |
1073 | value = SSH_TUNMODE_POINTOPOINT; | |
1074 | else if (strcasecmp(arg, "yes") == 0) | |
1075 | value = SSH_TUNMODE_YES; | |
1076 | else if (strcasecmp(arg, "no") == 0) | |
1077 | value = SSH_TUNMODE_NO; | |
1078 | else | |
1079 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" | |
1080 | "no argument: %s", filename, linenum, arg); | |
1081 | if (*intptr == -1) | |
1082 | *intptr = value; | |
1083 | break; | |
1084 | ||
e9702f7d | 1085 | case sDeprecated: |
7cac2b65 | 1086 | logit("%s line %d: Deprecated option %s", |
1087 | filename, linenum, arg); | |
1088 | while (arg) | |
1089 | arg = strdelim(&cp); | |
1090 | break; | |
1091 | ||
1092 | case sUnsupported: | |
1093 | logit("%s line %d: Unsupported option %s", | |
e9702f7d | 1094 | filename, linenum, arg); |
1095 | while (arg) | |
1096 | arg = strdelim(&cp); | |
1097 | break; | |
1098 | ||
1099 | default: | |
1100 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
1101 | filename, linenum, arg, opcode); | |
1102 | } | |
1103 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
1104 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
1105 | filename, linenum, arg); | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | /* Reads the server configuration file. */ | |
1110 | ||
1111 | void | |
7e82606e | 1112 | load_server_config(const char *filename, Buffer *conf) |
e9702f7d | 1113 | { |
7e82606e | 1114 | char line[1024], *cp; |
276b07a3 | 1115 | FILE *f; |
e9702f7d | 1116 | |
7e82606e | 1117 | debug2("%s: filename %s", __func__, filename); |
1118 | if ((f = fopen(filename, "r")) == NULL) { | |
e9702f7d | 1119 | perror(filename); |
1120 | exit(1); | |
1121 | } | |
7e82606e | 1122 | buffer_clear(conf); |
e9702f7d | 1123 | while (fgets(line, sizeof(line), f)) { |
7e82606e | 1124 | /* |
1125 | * Trim out comments and strip whitespace | |
1126 | * NB - preserve newlines, they are needed to reproduce | |
1127 | * line numbers later for error messages | |
1128 | */ | |
1129 | if ((cp = strchr(line, '#')) != NULL) | |
1130 | memcpy(cp, "\n", 2); | |
1131 | cp = line + strspn(line, " \t\r"); | |
1132 | ||
1133 | buffer_append(conf, cp, strlen(cp)); | |
3c0ef626 | 1134 | } |
7e82606e | 1135 | buffer_append(conf, "\0", 1); |
3c0ef626 | 1136 | fclose(f); |
7e82606e | 1137 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); |
1138 | } | |
1139 | ||
1140 | void | |
1141 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf) | |
1142 | { | |
1143 | int linenum, bad_options = 0; | |
1144 | char *cp, *obuf, *cbuf; | |
1145 | ||
1146 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); | |
1147 | ||
1148 | obuf = cbuf = xstrdup(buffer_ptr(conf)); | |
1149 | linenum = 1; | |
8b32eddc | 1150 | while ((cp = strsep(&cbuf, "\n")) != NULL) { |
7e82606e | 1151 | if (process_server_config_line(options, cp, filename, |
1152 | linenum++) != 0) | |
1153 | bad_options++; | |
1154 | } | |
1155 | xfree(obuf); | |
3c0ef626 | 1156 | if (bad_options > 0) |
1157 | fatal("%s: terminating, %d bad configuration options", | |
1158 | filename, bad_options); | |
1159 | } |