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Commit | Line | Data |
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8efc0c15 | 1 | /* |
5260325f | 2 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
3 | * All rights reserved | |
6ae2364d | 4 | * |
bcbf86ec | 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". | |
5260325f | 10 | */ |
8efc0c15 | 11 | |
12 | #include "includes.h" | |
cc4d7cb6 | 13 | RCSID("$OpenBSD: servconf.c,v 1.127 2003/09/01 18:15:50 markus Exp $"); |
8efc0c15 | 14 | |
15 | #include "ssh.h" | |
42f11eb2 | 16 | #include "log.h" |
8efc0c15 | 17 | #include "servconf.h" |
18 | #include "xmalloc.h" | |
a8be9f80 | 19 | #include "compat.h" |
42f11eb2 | 20 | #include "pathnames.h" |
21 | #include "tildexpand.h" | |
22 | #include "misc.h" | |
23 | #include "cipher.h" | |
b2552997 | 24 | #include "kex.h" |
25 | #include "mac.h" | |
42f11eb2 | 26 | |
396c147e | 27 | static void add_listen_addr(ServerOptions *, char *, u_short); |
28 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
48e671d5 | 29 | |
42f11eb2 | 30 | /* AF_UNSPEC or AF_INET or AF_INET6 */ |
31 | extern int IPv4or6; | |
1853d1ef | 32 | /* Use of privilege separation or not */ |
33 | extern int use_privsep; | |
42f11eb2 | 34 | |
8efc0c15 | 35 | /* Initializes the server options to their default values. */ |
36 | ||
6ae2364d | 37 | void |
5260325f | 38 | initialize_server_options(ServerOptions *options) |
8efc0c15 | 39 | { |
5260325f | 40 | memset(options, 0, sizeof(*options)); |
e15895cd | 41 | |
42 | /* Portable-specific options */ | |
7fceb20d | 43 | options->use_pam = -1; |
e15895cd | 44 | |
45 | /* Standard Options */ | |
48e671d5 | 46 | options->num_ports = 0; |
47 | options->ports_from_cmdline = 0; | |
48 | options->listen_addrs = NULL; | |
fa08c86b | 49 | options->num_host_key_files = 0; |
0fbe8c74 | 50 | options->pid_file = NULL; |
5260325f | 51 | options->server_key_bits = -1; |
52 | options->login_grace_time = -1; | |
53 | options->key_regeneration_time = -1; | |
15853e93 | 54 | options->permit_root_login = PERMIT_NOT_SET; |
5260325f | 55 | options->ignore_rhosts = -1; |
56 | options->ignore_user_known_hosts = -1; | |
57 | options->print_motd = -1; | |
4f4648f9 | 58 | options->print_lastlog = -1; |
5260325f | 59 | options->x11_forwarding = -1; |
60 | options->x11_display_offset = -1; | |
e6e573bd | 61 | options->x11_use_localhost = -1; |
fa649821 | 62 | options->xauth_location = NULL; |
5260325f | 63 | options->strict_modes = -1; |
64 | options->keepalives = -1; | |
5eaf8578 | 65 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
66 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
5260325f | 67 | options->rhosts_rsa_authentication = -1; |
8002af61 | 68 | options->hostbased_authentication = -1; |
69 | options->hostbased_uses_name_from_packet_only = -1; | |
5260325f | 70 | options->rsa_authentication = -1; |
fa08c86b | 71 | options->pubkey_authentication = -1; |
5260325f | 72 | options->kerberos_authentication = -1; |
73 | options->kerberos_or_local_passwd = -1; | |
74 | options->kerberos_ticket_cleanup = -1; | |
7364bd04 | 75 | options->gss_authentication=-1; |
76 | options->gss_cleanup_creds = -1; | |
5260325f | 77 | options->password_authentication = -1; |
94ec8c6b | 78 | options->kbd_interactive_authentication = -1; |
5ba55ada | 79 | options->challenge_response_authentication = -1; |
5260325f | 80 | options->permit_empty_passwd = -1; |
f00bab84 | 81 | options->permit_user_env = -1; |
5260325f | 82 | options->use_login = -1; |
636f76ca | 83 | options->compression = -1; |
33de75a3 | 84 | options->allow_tcp_forwarding = -1; |
5260325f | 85 | options->num_allow_users = 0; |
86 | options->num_deny_users = 0; | |
87 | options->num_allow_groups = 0; | |
88 | options->num_deny_groups = 0; | |
a8be9f80 | 89 | options->ciphers = NULL; |
b2552997 | 90 | options->macs = NULL; |
a8be9f80 | 91 | options->protocol = SSH_PROTO_UNKNOWN; |
1d1ffb87 | 92 | options->gateway_ports = -1; |
38c295d6 | 93 | options->num_subsystems = 0; |
c345cf9d | 94 | options->max_startups_begin = -1; |
95 | options->max_startups_rate = -1; | |
089fbbd2 | 96 | options->max_startups = -1; |
eea39c02 | 97 | options->banner = NULL; |
c5a7d788 | 98 | options->use_dns = -1; |
3ffc6336 | 99 | options->client_alive_interval = -1; |
100 | options->client_alive_count_max = -1; | |
c8445989 | 101 | options->authorized_keys_file = NULL; |
102 | options->authorized_keys_file2 = NULL; | |
1853d1ef | 103 | |
1853d1ef | 104 | /* Needs to be accessable in many places */ |
105 | use_privsep = -1; | |
8efc0c15 | 106 | } |
107 | ||
6ae2364d | 108 | void |
5260325f | 109 | fill_default_server_options(ServerOptions *options) |
8efc0c15 | 110 | { |
e15895cd | 111 | /* Portable-specific options */ |
7fceb20d | 112 | if (options->use_pam == -1) |
1457e7ff | 113 | options->use_pam = 1; |
e15895cd | 114 | |
115 | /* Standard Options */ | |
fa08c86b | 116 | if (options->protocol == SSH_PROTO_UNKNOWN) |
117 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
118 | if (options->num_host_key_files == 0) { | |
119 | /* fill default hostkeys for protocols */ | |
120 | if (options->protocol & SSH_PROTO_1) | |
0f84fe37 | 121 | options->host_key_files[options->num_host_key_files++] = |
122 | _PATH_HOST_KEY_FILE; | |
123 | if (options->protocol & SSH_PROTO_2) { | |
124 | options->host_key_files[options->num_host_key_files++] = | |
125 | _PATH_HOST_RSA_KEY_FILE; | |
126 | options->host_key_files[options->num_host_key_files++] = | |
127 | _PATH_HOST_DSA_KEY_FILE; | |
128 | } | |
fa08c86b | 129 | } |
48e671d5 | 130 | if (options->num_ports == 0) |
131 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
132 | if (options->listen_addrs == NULL) | |
2d2a2c65 | 133 | add_listen_addr(options, NULL, 0); |
0fbe8c74 | 134 | if (options->pid_file == NULL) |
42f11eb2 | 135 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
5260325f | 136 | if (options->server_key_bits == -1) |
137 | options->server_key_bits = 768; | |
138 | if (options->login_grace_time == -1) | |
3445ca02 | 139 | options->login_grace_time = 120; |
5260325f | 140 | if (options->key_regeneration_time == -1) |
141 | options->key_regeneration_time = 3600; | |
15853e93 | 142 | if (options->permit_root_login == PERMIT_NOT_SET) |
143 | options->permit_root_login = PERMIT_YES; | |
5260325f | 144 | if (options->ignore_rhosts == -1) |
c8d54615 | 145 | options->ignore_rhosts = 1; |
5260325f | 146 | if (options->ignore_user_known_hosts == -1) |
147 | options->ignore_user_known_hosts = 0; | |
5260325f | 148 | if (options->print_motd == -1) |
149 | options->print_motd = 1; | |
4f4648f9 | 150 | if (options->print_lastlog == -1) |
151 | options->print_lastlog = 1; | |
5260325f | 152 | if (options->x11_forwarding == -1) |
c8d54615 | 153 | options->x11_forwarding = 0; |
5260325f | 154 | if (options->x11_display_offset == -1) |
c8d54615 | 155 | options->x11_display_offset = 10; |
e6e573bd | 156 | if (options->x11_use_localhost == -1) |
157 | options->x11_use_localhost = 1; | |
fa649821 | 158 | if (options->xauth_location == NULL) |
fd9ede94 | 159 | options->xauth_location = _PATH_XAUTH; |
5260325f | 160 | if (options->strict_modes == -1) |
161 | options->strict_modes = 1; | |
162 | if (options->keepalives == -1) | |
163 | options->keepalives = 1; | |
5eaf8578 | 164 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
5260325f | 165 | options->log_facility = SYSLOG_FACILITY_AUTH; |
5eaf8578 | 166 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 167 | options->log_level = SYSLOG_LEVEL_INFO; |
5260325f | 168 | if (options->rhosts_rsa_authentication == -1) |
c8d54615 | 169 | options->rhosts_rsa_authentication = 0; |
8002af61 | 170 | if (options->hostbased_authentication == -1) |
171 | options->hostbased_authentication = 0; | |
172 | if (options->hostbased_uses_name_from_packet_only == -1) | |
173 | options->hostbased_uses_name_from_packet_only = 0; | |
5260325f | 174 | if (options->rsa_authentication == -1) |
175 | options->rsa_authentication = 1; | |
fa08c86b | 176 | if (options->pubkey_authentication == -1) |
177 | options->pubkey_authentication = 1; | |
5260325f | 178 | if (options->kerberos_authentication == -1) |
eadc806d | 179 | options->kerberos_authentication = 0; |
5260325f | 180 | if (options->kerberos_or_local_passwd == -1) |
181 | options->kerberos_or_local_passwd = 1; | |
182 | if (options->kerberos_ticket_cleanup == -1) | |
183 | options->kerberos_ticket_cleanup = 1; | |
7364bd04 | 184 | if (options->gss_authentication == -1) |
185 | options->gss_authentication = 0; | |
186 | if (options->gss_cleanup_creds == -1) | |
187 | options->gss_cleanup_creds = 1; | |
5260325f | 188 | if (options->password_authentication == -1) |
189 | options->password_authentication = 1; | |
94ec8c6b | 190 | if (options->kbd_interactive_authentication == -1) |
191 | options->kbd_interactive_authentication = 0; | |
5ba55ada | 192 | if (options->challenge_response_authentication == -1) |
193 | options->challenge_response_authentication = 1; | |
5260325f | 194 | if (options->permit_empty_passwd == -1) |
c8d54615 | 195 | options->permit_empty_passwd = 0; |
f00bab84 | 196 | if (options->permit_user_env == -1) |
197 | options->permit_user_env = 0; | |
5260325f | 198 | if (options->use_login == -1) |
199 | options->use_login = 0; | |
636f76ca | 200 | if (options->compression == -1) |
201 | options->compression = 1; | |
33de75a3 | 202 | if (options->allow_tcp_forwarding == -1) |
203 | options->allow_tcp_forwarding = 1; | |
1d1ffb87 | 204 | if (options->gateway_ports == -1) |
205 | options->gateway_ports = 0; | |
089fbbd2 | 206 | if (options->max_startups == -1) |
207 | options->max_startups = 10; | |
c345cf9d | 208 | if (options->max_startups_rate == -1) |
209 | options->max_startups_rate = 100; /* 100% */ | |
210 | if (options->max_startups_begin == -1) | |
211 | options->max_startups_begin = options->max_startups; | |
c5a7d788 | 212 | if (options->use_dns == -1) |
213 | options->use_dns = 1; | |
3ffc6336 | 214 | if (options->client_alive_interval == -1) |
184eed6a | 215 | options->client_alive_interval = 0; |
3ffc6336 | 216 | if (options->client_alive_count_max == -1) |
217 | options->client_alive_count_max = 3; | |
5df83e07 | 218 | if (options->authorized_keys_file2 == NULL) { |
219 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
220 | if (options->authorized_keys_file != NULL) | |
221 | options->authorized_keys_file2 = options->authorized_keys_file; | |
222 | else | |
223 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
224 | } | |
225 | if (options->authorized_keys_file == NULL) | |
226 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
1853d1ef | 227 | |
2ee1b704 | 228 | /* Turn privilege separation on by default */ |
1853d1ef | 229 | if (use_privsep == -1) |
2ee1b704 | 230 | use_privsep = 1; |
e299a298 | 231 | |
4165b82e | 232 | #ifndef HAVE_MMAP |
e299a298 | 233 | if (use_privsep && options->compression == 1) { |
234 | error("This platform does not support both privilege " | |
235 | "separation and compression"); | |
236 | error("Compression disabled"); | |
237 | options->compression = 0; | |
238 | } | |
239 | #endif | |
240 | ||
8efc0c15 | 241 | } |
242 | ||
8efc0c15 | 243 | /* Keyword tokens. */ |
5260325f | 244 | typedef enum { |
245 | sBadOption, /* == unknown option */ | |
e15895cd | 246 | /* Portable-specific options */ |
7fceb20d | 247 | sUsePAM, |
e15895cd | 248 | /* Standard Options */ |
5260325f | 249 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, |
250 | sPermitRootLogin, sLogFacility, sLogLevel, | |
0598d99d | 251 | sRhostsRSAAuthentication, sRSAAuthentication, |
5260325f | 252 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
1c590258 | 253 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
94ec8c6b | 254 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, |
4f4648f9 | 255 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e6e573bd | 256 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
5c53a31e | 257 | sStrictModes, sEmptyPasswd, sKeepAlives, |
f00bab84 | 258 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
33de75a3 | 259 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
b2552997 | 260 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
fa08c86b | 261 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, |
c5a7d788 | 262 | sBanner, sUseDNS, sHostbasedAuthentication, |
184eed6a | 263 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
c8445989 | 264 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
7364bd04 | 265 | sGssAuthentication, sGssCleanupCreds, |
2ea6de2b | 266 | sUsePrivilegeSeparation, |
a2144546 | 267 | sDeprecated, sUnsupported |
8efc0c15 | 268 | } ServerOpCodes; |
269 | ||
270 | /* Textual representation of the tokens. */ | |
5260325f | 271 | static struct { |
272 | const char *name; | |
273 | ServerOpCodes opcode; | |
274 | } keywords[] = { | |
e15895cd | 275 | /* Portable-specific options */ |
b06b11ad | 276 | #ifdef USE_PAM |
fe46678b | 277 | { "usepam", sUsePAM }, |
b06b11ad | 278 | #else |
fe46678b | 279 | { "usepam", sUnsupported }, |
b06b11ad | 280 | #endif |
fe46678b | 281 | { "pamauthenticationviakbdint", sDeprecated }, |
e15895cd | 282 | /* Standard Options */ |
5260325f | 283 | { "port", sPort }, |
284 | { "hostkey", sHostKeyFile }, | |
fa08c86b | 285 | { "hostdsakey", sHostKeyFile }, /* alias */ |
2b87da3b | 286 | { "pidfile", sPidFile }, |
5260325f | 287 | { "serverkeybits", sServerKeyBits }, |
288 | { "logingracetime", sLoginGraceTime }, | |
289 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
290 | { "permitrootlogin", sPermitRootLogin }, | |
291 | { "syslogfacility", sLogFacility }, | |
292 | { "loglevel", sLogLevel }, | |
0598d99d | 293 | { "rhostsauthentication", sDeprecated }, |
5260325f | 294 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, |
8002af61 | 295 | { "hostbasedauthentication", sHostbasedAuthentication }, |
296 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, | |
5260325f | 297 | { "rsaauthentication", sRSAAuthentication }, |
fa08c86b | 298 | { "pubkeyauthentication", sPubkeyAuthentication }, |
299 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
1c590258 | 300 | #ifdef KRB5 |
5260325f | 301 | { "kerberosauthentication", sKerberosAuthentication }, |
302 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
303 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
a2144546 | 304 | #else |
305 | { "kerberosauthentication", sUnsupported }, | |
306 | { "kerberosorlocalpasswd", sUnsupported }, | |
307 | { "kerberosticketcleanup", sUnsupported }, | |
a2144546 | 308 | #endif |
8f73f7bb | 309 | { "kerberostgtpassing", sUnsupported }, |
a2144546 | 310 | { "afstokenpassing", sUnsupported }, |
7364bd04 | 311 | #ifdef GSSAPI |
312 | { "gssapiauthentication", sGssAuthentication }, | |
313 | { "gssapicleanupcreds", sGssCleanupCreds }, | |
314 | #else | |
315 | { "gssapiauthentication", sUnsupported }, | |
316 | { "gssapicleanupcreds", sUnsupported }, | |
317 | #endif | |
5260325f | 318 | { "passwordauthentication", sPasswordAuthentication }, |
94ec8c6b | 319 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, |
d464095c | 320 | { "challengeresponseauthentication", sChallengeResponseAuthentication }, |
321 | { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ | |
5c53a31e | 322 | { "checkmail", sDeprecated }, |
5260325f | 323 | { "listenaddress", sListenAddress }, |
324 | { "printmotd", sPrintMotd }, | |
4f4648f9 | 325 | { "printlastlog", sPrintLastLog }, |
5260325f | 326 | { "ignorerhosts", sIgnoreRhosts }, |
327 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
328 | { "x11forwarding", sX11Forwarding }, | |
329 | { "x11displayoffset", sX11DisplayOffset }, | |
e6e573bd | 330 | { "x11uselocalhost", sX11UseLocalhost }, |
fa649821 | 331 | { "xauthlocation", sXAuthLocation }, |
5260325f | 332 | { "strictmodes", sStrictModes }, |
333 | { "permitemptypasswords", sEmptyPasswd }, | |
f00bab84 | 334 | { "permituserenvironment", sPermitUserEnvironment }, |
5260325f | 335 | { "uselogin", sUseLogin }, |
636f76ca | 336 | { "compression", sCompression }, |
5260325f | 337 | { "keepalive", sKeepAlives }, |
33de75a3 | 338 | { "allowtcpforwarding", sAllowTcpForwarding }, |
5260325f | 339 | { "allowusers", sAllowUsers }, |
340 | { "denyusers", sDenyUsers }, | |
341 | { "allowgroups", sAllowGroups }, | |
342 | { "denygroups", sDenyGroups }, | |
a8be9f80 | 343 | { "ciphers", sCiphers }, |
b2552997 | 344 | { "macs", sMacs }, |
a8be9f80 | 345 | { "protocol", sProtocol }, |
1d1ffb87 | 346 | { "gatewayports", sGatewayPorts }, |
38c295d6 | 347 | { "subsystem", sSubsystem }, |
089fbbd2 | 348 | { "maxstartups", sMaxStartups }, |
eea39c02 | 349 | { "banner", sBanner }, |
c5a7d788 | 350 | { "usedns", sUseDNS }, |
351 | { "verifyreversemapping", sDeprecated }, | |
352 | { "reversemappingcheck", sDeprecated }, | |
3ffc6336 | 353 | { "clientaliveinterval", sClientAliveInterval }, |
354 | { "clientalivecountmax", sClientAliveCountMax }, | |
c8445989 | 355 | { "authorizedkeysfile", sAuthorizedKeysFile }, |
356 | { "authorizedkeysfile2", sAuthorizedKeysFile2 }, | |
1853d1ef | 357 | { "useprivilegeseparation", sUsePrivilegeSeparation}, |
17a3011c | 358 | { NULL, sBadOption } |
8efc0c15 | 359 | }; |
360 | ||
aa3378df | 361 | /* |
6be9a5e8 | 362 | * Returns the number of the token pointed to by cp or sBadOption. |
aa3378df | 363 | */ |
8efc0c15 | 364 | |
6ae2364d | 365 | static ServerOpCodes |
5260325f | 366 | parse_token(const char *cp, const char *filename, |
367 | int linenum) | |
8efc0c15 | 368 | { |
1e3b8b07 | 369 | u_int i; |
8efc0c15 | 370 | |
5260325f | 371 | for (i = 0; keywords[i].name; i++) |
aa3378df | 372 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 373 | return keywords[i].opcode; |
8efc0c15 | 374 | |
b7c70970 | 375 | error("%s: line %d: Bad configuration option: %s", |
376 | filename, linenum, cp); | |
5260325f | 377 | return sBadOption; |
8efc0c15 | 378 | } |
379 | ||
396c147e | 380 | static void |
2d2a2c65 | 381 | add_listen_addr(ServerOptions *options, char *addr, u_short port) |
48e671d5 | 382 | { |
48e671d5 | 383 | int i; |
384 | ||
385 | if (options->num_ports == 0) | |
386 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
2d2a2c65 | 387 | if (port == 0) |
d11c1288 | 388 | for (i = 0; i < options->num_ports; i++) |
389 | add_one_listen_addr(options, addr, options->ports[i]); | |
390 | else | |
2d2a2c65 | 391 | add_one_listen_addr(options, addr, port); |
d11c1288 | 392 | } |
393 | ||
396c147e | 394 | static void |
d11c1288 | 395 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) |
396 | { | |
397 | struct addrinfo hints, *ai, *aitop; | |
398 | char strport[NI_MAXSERV]; | |
399 | int gaierr; | |
400 | ||
401 | memset(&hints, 0, sizeof(hints)); | |
402 | hints.ai_family = IPv4or6; | |
403 | hints.ai_socktype = SOCK_STREAM; | |
404 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
7528d467 | 405 | snprintf(strport, sizeof strport, "%u", port); |
d11c1288 | 406 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
407 | fatal("bad addr or host: %s (%s)", | |
408 | addr ? addr : "<NULL>", | |
409 | gai_strerror(gaierr)); | |
410 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
411 | ; | |
412 | ai->ai_next = options->listen_addrs; | |
413 | options->listen_addrs = aitop; | |
48e671d5 | 414 | } |
415 | ||
2717fa0f | 416 | int |
417 | process_server_config_line(ServerOptions *options, char *line, | |
418 | const char *filename, int linenum) | |
8efc0c15 | 419 | { |
d11c1288 | 420 | char *cp, **charptr, *arg, *p; |
7528d467 | 421 | int *intptr, value, i, n; |
5260325f | 422 | ServerOpCodes opcode; |
423 | ||
2717fa0f | 424 | cp = line; |
425 | arg = strdelim(&cp); | |
426 | /* Ignore leading whitespace */ | |
427 | if (*arg == '\0') | |
704b1659 | 428 | arg = strdelim(&cp); |
2717fa0f | 429 | if (!arg || !*arg || *arg == '#') |
430 | return 0; | |
431 | intptr = NULL; | |
432 | charptr = NULL; | |
433 | opcode = parse_token(arg, filename, linenum); | |
434 | switch (opcode) { | |
435 | /* Portable-specific options */ | |
7fceb20d | 436 | case sUsePAM: |
437 | intptr = &options->use_pam; | |
2717fa0f | 438 | goto parse_flag; |
48e671d5 | 439 | |
2717fa0f | 440 | /* Standard Options */ |
441 | case sBadOption: | |
442 | return -1; | |
443 | case sPort: | |
444 | /* ignore ports from configfile if cmdline specifies ports */ | |
445 | if (options->ports_from_cmdline) | |
446 | return 0; | |
447 | if (options->listen_addrs != NULL) | |
448 | fatal("%s line %d: ports must be specified before " | |
3a454b6a | 449 | "ListenAddress.", filename, linenum); |
2717fa0f | 450 | if (options->num_ports >= MAX_PORTS) |
451 | fatal("%s line %d: too many ports.", | |
452 | filename, linenum); | |
453 | arg = strdelim(&cp); | |
454 | if (!arg || *arg == '\0') | |
455 | fatal("%s line %d: missing port number.", | |
456 | filename, linenum); | |
457 | options->ports[options->num_ports++] = a2port(arg); | |
458 | if (options->ports[options->num_ports-1] == 0) | |
459 | fatal("%s line %d: Badly formatted port number.", | |
460 | filename, linenum); | |
461 | break; | |
462 | ||
463 | case sServerKeyBits: | |
464 | intptr = &options->server_key_bits; | |
5260325f | 465 | parse_int: |
2717fa0f | 466 | arg = strdelim(&cp); |
467 | if (!arg || *arg == '\0') | |
468 | fatal("%s line %d: missing integer value.", | |
469 | filename, linenum); | |
470 | value = atoi(arg); | |
471 | if (*intptr == -1) | |
472 | *intptr = value; | |
473 | break; | |
474 | ||
475 | case sLoginGraceTime: | |
476 | intptr = &options->login_grace_time; | |
e2b1fb42 | 477 | parse_time: |
2717fa0f | 478 | arg = strdelim(&cp); |
479 | if (!arg || *arg == '\0') | |
480 | fatal("%s line %d: missing time value.", | |
481 | filename, linenum); | |
482 | if ((value = convtime(arg)) == -1) | |
483 | fatal("%s line %d: invalid time value.", | |
484 | filename, linenum); | |
485 | if (*intptr == -1) | |
486 | *intptr = value; | |
487 | break; | |
488 | ||
489 | case sKeyRegenerationTime: | |
490 | intptr = &options->key_regeneration_time; | |
491 | goto parse_time; | |
492 | ||
493 | case sListenAddress: | |
494 | arg = strdelim(&cp); | |
495 | if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0) | |
496 | fatal("%s line %d: missing inet addr.", | |
497 | filename, linenum); | |
498 | if (*arg == '[') { | |
499 | if ((p = strchr(arg, ']')) == NULL) | |
500 | fatal("%s line %d: bad ipv6 inet addr usage.", | |
e2b1fb42 | 501 | filename, linenum); |
2717fa0f | 502 | arg++; |
503 | memmove(p, p+1, strlen(p+1)+1); | |
504 | } else if (((p = strchr(arg, ':')) == NULL) || | |
505 | (strchr(p+1, ':') != NULL)) { | |
506 | add_listen_addr(options, arg, 0); | |
e2b1fb42 | 507 | break; |
2717fa0f | 508 | } |
509 | if (*p == ':') { | |
510 | u_short port; | |
5260325f | 511 | |
2717fa0f | 512 | p++; |
513 | if (*p == '\0') | |
514 | fatal("%s line %d: bad inet addr:port usage.", | |
48e671d5 | 515 | filename, linenum); |
2717fa0f | 516 | else { |
517 | *(p-1) = '\0'; | |
518 | if ((port = a2port(p)) == 0) | |
519 | fatal("%s line %d: bad port number.", | |
d11c1288 | 520 | filename, linenum); |
2717fa0f | 521 | add_listen_addr(options, arg, port); |
d11c1288 | 522 | } |
2717fa0f | 523 | } else if (*p == '\0') |
524 | add_listen_addr(options, arg, 0); | |
525 | else | |
526 | fatal("%s line %d: bad inet addr usage.", | |
527 | filename, linenum); | |
528 | break; | |
529 | ||
530 | case sHostKeyFile: | |
531 | intptr = &options->num_host_key_files; | |
532 | if (*intptr >= MAX_HOSTKEYS) | |
533 | fatal("%s line %d: too many host keys specified (max %d).", | |
534 | filename, linenum, MAX_HOSTKEYS); | |
535 | charptr = &options->host_key_files[*intptr]; | |
fa649821 | 536 | parse_filename: |
2717fa0f | 537 | arg = strdelim(&cp); |
538 | if (!arg || *arg == '\0') | |
539 | fatal("%s line %d: missing file name.", | |
540 | filename, linenum); | |
541 | if (*charptr == NULL) { | |
542 | *charptr = tilde_expand_filename(arg, getuid()); | |
543 | /* increase optional counter */ | |
544 | if (intptr != NULL) | |
545 | *intptr = *intptr + 1; | |
546 | } | |
547 | break; | |
0fbe8c74 | 548 | |
2717fa0f | 549 | case sPidFile: |
550 | charptr = &options->pid_file; | |
551 | goto parse_filename; | |
5260325f | 552 | |
2717fa0f | 553 | case sPermitRootLogin: |
554 | intptr = &options->permit_root_login; | |
555 | arg = strdelim(&cp); | |
556 | if (!arg || *arg == '\0') | |
557 | fatal("%s line %d: missing yes/" | |
558 | "without-password/forced-commands-only/no " | |
559 | "argument.", filename, linenum); | |
560 | value = 0; /* silence compiler */ | |
561 | if (strcmp(arg, "without-password") == 0) | |
562 | value = PERMIT_NO_PASSWD; | |
563 | else if (strcmp(arg, "forced-commands-only") == 0) | |
564 | value = PERMIT_FORCED_ONLY; | |
565 | else if (strcmp(arg, "yes") == 0) | |
566 | value = PERMIT_YES; | |
567 | else if (strcmp(arg, "no") == 0) | |
568 | value = PERMIT_NO; | |
569 | else | |
570 | fatal("%s line %d: Bad yes/" | |
571 | "without-password/forced-commands-only/no " | |
572 | "argument: %s", filename, linenum, arg); | |
573 | if (*intptr == -1) | |
574 | *intptr = value; | |
575 | break; | |
576 | ||
577 | case sIgnoreRhosts: | |
578 | intptr = &options->ignore_rhosts; | |
5260325f | 579 | parse_flag: |
2717fa0f | 580 | arg = strdelim(&cp); |
581 | if (!arg || *arg == '\0') | |
582 | fatal("%s line %d: missing yes/no argument.", | |
583 | filename, linenum); | |
584 | value = 0; /* silence compiler */ | |
585 | if (strcmp(arg, "yes") == 0) | |
586 | value = 1; | |
587 | else if (strcmp(arg, "no") == 0) | |
588 | value = 0; | |
589 | else | |
590 | fatal("%s line %d: Bad yes/no argument: %s", | |
591 | filename, linenum, arg); | |
592 | if (*intptr == -1) | |
593 | *intptr = value; | |
594 | break; | |
595 | ||
596 | case sIgnoreUserKnownHosts: | |
597 | intptr = &options->ignore_user_known_hosts; | |
598 | goto parse_flag; | |
599 | ||
2717fa0f | 600 | case sRhostsRSAAuthentication: |
601 | intptr = &options->rhosts_rsa_authentication; | |
602 | goto parse_flag; | |
603 | ||
604 | case sHostbasedAuthentication: | |
605 | intptr = &options->hostbased_authentication; | |
606 | goto parse_flag; | |
607 | ||
608 | case sHostbasedUsesNameFromPacketOnly: | |
609 | intptr = &options->hostbased_uses_name_from_packet_only; | |
610 | goto parse_flag; | |
611 | ||
612 | case sRSAAuthentication: | |
613 | intptr = &options->rsa_authentication; | |
614 | goto parse_flag; | |
615 | ||
616 | case sPubkeyAuthentication: | |
617 | intptr = &options->pubkey_authentication; | |
618 | goto parse_flag; | |
d0ec7f42 | 619 | |
2717fa0f | 620 | case sKerberosAuthentication: |
621 | intptr = &options->kerberos_authentication; | |
622 | goto parse_flag; | |
5260325f | 623 | |
2717fa0f | 624 | case sKerberosOrLocalPasswd: |
625 | intptr = &options->kerberos_or_local_passwd; | |
626 | goto parse_flag; | |
5260325f | 627 | |
2717fa0f | 628 | case sKerberosTicketCleanup: |
629 | intptr = &options->kerberos_ticket_cleanup; | |
630 | goto parse_flag; | |
d0ec7f42 | 631 | |
7364bd04 | 632 | case sGssAuthentication: |
633 | intptr = &options->gss_authentication; | |
634 | goto parse_flag; | |
635 | ||
636 | case sGssCleanupCreds: | |
637 | intptr = &options->gss_cleanup_creds; | |
638 | goto parse_flag; | |
639 | ||
2717fa0f | 640 | case sPasswordAuthentication: |
641 | intptr = &options->password_authentication; | |
642 | goto parse_flag; | |
5260325f | 643 | |
2717fa0f | 644 | case sKbdInteractiveAuthentication: |
645 | intptr = &options->kbd_interactive_authentication; | |
646 | goto parse_flag; | |
8002af61 | 647 | |
2717fa0f | 648 | case sChallengeResponseAuthentication: |
649 | intptr = &options->challenge_response_authentication; | |
650 | goto parse_flag; | |
8002af61 | 651 | |
2717fa0f | 652 | case sPrintMotd: |
653 | intptr = &options->print_motd; | |
654 | goto parse_flag; | |
5260325f | 655 | |
2717fa0f | 656 | case sPrintLastLog: |
657 | intptr = &options->print_lastlog; | |
658 | goto parse_flag; | |
5260325f | 659 | |
2717fa0f | 660 | case sX11Forwarding: |
661 | intptr = &options->x11_forwarding; | |
662 | goto parse_flag; | |
5260325f | 663 | |
2717fa0f | 664 | case sX11DisplayOffset: |
665 | intptr = &options->x11_display_offset; | |
666 | goto parse_int; | |
8efc0c15 | 667 | |
e6e573bd | 668 | case sX11UseLocalhost: |
669 | intptr = &options->x11_use_localhost; | |
670 | goto parse_flag; | |
671 | ||
2717fa0f | 672 | case sXAuthLocation: |
673 | charptr = &options->xauth_location; | |
674 | goto parse_filename; | |
5260325f | 675 | |
2717fa0f | 676 | case sStrictModes: |
677 | intptr = &options->strict_modes; | |
678 | goto parse_flag; | |
5260325f | 679 | |
2717fa0f | 680 | case sKeepAlives: |
681 | intptr = &options->keepalives; | |
682 | goto parse_flag; | |
33de75a3 | 683 | |
2717fa0f | 684 | case sEmptyPasswd: |
685 | intptr = &options->permit_empty_passwd; | |
686 | goto parse_flag; | |
5260325f | 687 | |
f00bab84 | 688 | case sPermitUserEnvironment: |
689 | intptr = &options->permit_user_env; | |
690 | goto parse_flag; | |
691 | ||
2717fa0f | 692 | case sUseLogin: |
693 | intptr = &options->use_login; | |
694 | goto parse_flag; | |
5260325f | 695 | |
636f76ca | 696 | case sCompression: |
697 | intptr = &options->compression; | |
698 | goto parse_flag; | |
699 | ||
2717fa0f | 700 | case sGatewayPorts: |
701 | intptr = &options->gateway_ports; | |
702 | goto parse_flag; | |
5260325f | 703 | |
c5a7d788 | 704 | case sUseDNS: |
705 | intptr = &options->use_dns; | |
2717fa0f | 706 | goto parse_flag; |
5260325f | 707 | |
2717fa0f | 708 | case sLogFacility: |
709 | intptr = (int *) &options->log_facility; | |
710 | arg = strdelim(&cp); | |
711 | value = log_facility_number(arg); | |
5eaf8578 | 712 | if (value == SYSLOG_FACILITY_NOT_SET) |
2717fa0f | 713 | fatal("%.200s line %d: unsupported log facility '%s'", |
714 | filename, linenum, arg ? arg : "<NONE>"); | |
715 | if (*intptr == -1) | |
716 | *intptr = (SyslogFacility) value; | |
717 | break; | |
718 | ||
719 | case sLogLevel: | |
720 | intptr = (int *) &options->log_level; | |
721 | arg = strdelim(&cp); | |
722 | value = log_level_number(arg); | |
5eaf8578 | 723 | if (value == SYSLOG_LEVEL_NOT_SET) |
2717fa0f | 724 | fatal("%.200s line %d: unsupported log level '%s'", |
725 | filename, linenum, arg ? arg : "<NONE>"); | |
726 | if (*intptr == -1) | |
727 | *intptr = (LogLevel) value; | |
728 | break; | |
729 | ||
730 | case sAllowTcpForwarding: | |
731 | intptr = &options->allow_tcp_forwarding; | |
732 | goto parse_flag; | |
733 | ||
1853d1ef | 734 | case sUsePrivilegeSeparation: |
735 | intptr = &use_privsep; | |
736 | goto parse_flag; | |
737 | ||
2717fa0f | 738 | case sAllowUsers: |
739 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
740 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
741 | fatal("%s line %d: too many allow users.", | |
742 | filename, linenum); | |
7528d467 | 743 | options->allow_users[options->num_allow_users++] = |
744 | xstrdup(arg); | |
2717fa0f | 745 | } |
746 | break; | |
a8be9f80 | 747 | |
2717fa0f | 748 | case sDenyUsers: |
749 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
750 | if (options->num_deny_users >= MAX_DENY_USERS) | |
751 | fatal( "%s line %d: too many deny users.", | |
752 | filename, linenum); | |
7528d467 | 753 | options->deny_users[options->num_deny_users++] = |
754 | xstrdup(arg); | |
2717fa0f | 755 | } |
756 | break; | |
b2552997 | 757 | |
2717fa0f | 758 | case sAllowGroups: |
759 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
760 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
761 | fatal("%s line %d: too many allow groups.", | |
762 | filename, linenum); | |
7528d467 | 763 | options->allow_groups[options->num_allow_groups++] = |
764 | xstrdup(arg); | |
2717fa0f | 765 | } |
766 | break; | |
a8be9f80 | 767 | |
2717fa0f | 768 | case sDenyGroups: |
769 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
770 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
771 | fatal("%s line %d: too many deny groups.", | |
772 | filename, linenum); | |
773 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
774 | } | |
775 | break; | |
38c295d6 | 776 | |
2717fa0f | 777 | case sCiphers: |
778 | arg = strdelim(&cp); | |
779 | if (!arg || *arg == '\0') | |
780 | fatal("%s line %d: Missing argument.", filename, linenum); | |
781 | if (!ciphers_valid(arg)) | |
782 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
783 | filename, linenum, arg ? arg : "<NONE>"); | |
784 | if (options->ciphers == NULL) | |
785 | options->ciphers = xstrdup(arg); | |
786 | break; | |
787 | ||
788 | case sMacs: | |
789 | arg = strdelim(&cp); | |
790 | if (!arg || *arg == '\0') | |
791 | fatal("%s line %d: Missing argument.", filename, linenum); | |
792 | if (!mac_valid(arg)) | |
793 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
794 | filename, linenum, arg ? arg : "<NONE>"); | |
795 | if (options->macs == NULL) | |
796 | options->macs = xstrdup(arg); | |
797 | break; | |
798 | ||
799 | case sProtocol: | |
800 | intptr = &options->protocol; | |
801 | arg = strdelim(&cp); | |
802 | if (!arg || *arg == '\0') | |
803 | fatal("%s line %d: Missing argument.", filename, linenum); | |
804 | value = proto_spec(arg); | |
805 | if (value == SSH_PROTO_UNKNOWN) | |
806 | fatal("%s line %d: Bad protocol spec '%s'.", | |
184eed6a | 807 | filename, linenum, arg ? arg : "<NONE>"); |
2717fa0f | 808 | if (*intptr == SSH_PROTO_UNKNOWN) |
809 | *intptr = value; | |
810 | break; | |
811 | ||
812 | case sSubsystem: | |
813 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
814 | fatal("%s line %d: too many subsystems defined.", | |
184eed6a | 815 | filename, linenum); |
2717fa0f | 816 | } |
817 | arg = strdelim(&cp); | |
818 | if (!arg || *arg == '\0') | |
819 | fatal("%s line %d: Missing subsystem name.", | |
184eed6a | 820 | filename, linenum); |
2717fa0f | 821 | for (i = 0; i < options->num_subsystems; i++) |
822 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
823 | fatal("%s line %d: Subsystem '%s' already defined.", | |
184eed6a | 824 | filename, linenum, arg); |
2717fa0f | 825 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); |
826 | arg = strdelim(&cp); | |
827 | if (!arg || *arg == '\0') | |
828 | fatal("%s line %d: Missing subsystem command.", | |
184eed6a | 829 | filename, linenum); |
2717fa0f | 830 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); |
831 | options->num_subsystems++; | |
832 | break; | |
833 | ||
834 | case sMaxStartups: | |
835 | arg = strdelim(&cp); | |
836 | if (!arg || *arg == '\0') | |
837 | fatal("%s line %d: Missing MaxStartups spec.", | |
184eed6a | 838 | filename, linenum); |
2717fa0f | 839 | if ((n = sscanf(arg, "%d:%d:%d", |
840 | &options->max_startups_begin, | |
841 | &options->max_startups_rate, | |
842 | &options->max_startups)) == 3) { | |
843 | if (options->max_startups_begin > | |
844 | options->max_startups || | |
845 | options->max_startups_rate > 100 || | |
846 | options->max_startups_rate < 1) | |
c345cf9d | 847 | fatal("%s line %d: Illegal MaxStartups spec.", |
97de229c | 848 | filename, linenum); |
2717fa0f | 849 | } else if (n != 1) |
850 | fatal("%s line %d: Illegal MaxStartups spec.", | |
851 | filename, linenum); | |
852 | else | |
853 | options->max_startups = options->max_startups_begin; | |
854 | break; | |
855 | ||
856 | case sBanner: | |
857 | charptr = &options->banner; | |
858 | goto parse_filename; | |
859 | /* | |
860 | * These options can contain %X options expanded at | |
861 | * connect time, so that you can specify paths like: | |
862 | * | |
863 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
864 | */ | |
865 | case sAuthorizedKeysFile: | |
866 | case sAuthorizedKeysFile2: | |
867 | charptr = (opcode == sAuthorizedKeysFile ) ? | |
868 | &options->authorized_keys_file : | |
869 | &options->authorized_keys_file2; | |
870 | goto parse_filename; | |
871 | ||
872 | case sClientAliveInterval: | |
873 | intptr = &options->client_alive_interval; | |
874 | goto parse_time; | |
875 | ||
876 | case sClientAliveCountMax: | |
877 | intptr = &options->client_alive_count_max; | |
878 | goto parse_int; | |
879 | ||
880 | case sDeprecated: | |
bbe88b6d | 881 | logit("%s line %d: Deprecated option %s", |
2717fa0f | 882 | filename, linenum, arg); |
883 | while (arg) | |
884 | arg = strdelim(&cp); | |
885 | break; | |
886 | ||
a2144546 | 887 | case sUnsupported: |
888 | logit("%s line %d: Unsupported option %s", | |
889 | filename, linenum, arg); | |
890 | while (arg) | |
891 | arg = strdelim(&cp); | |
892 | break; | |
893 | ||
2717fa0f | 894 | default: |
895 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
896 | filename, linenum, arg, opcode); | |
897 | } | |
898 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
899 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
900 | filename, linenum, arg); | |
901 | return 0; | |
902 | } | |
089fbbd2 | 903 | |
2717fa0f | 904 | /* Reads the server configuration file. */ |
5c53a31e | 905 | |
2717fa0f | 906 | void |
907 | read_server_config(ServerOptions *options, const char *filename) | |
908 | { | |
7528d467 | 909 | int linenum, bad_options = 0; |
2717fa0f | 910 | char line[1024]; |
7528d467 | 911 | FILE *f; |
2717fa0f | 912 | |
34934506 | 913 | debug2("read_server_config: filename %s", filename); |
2717fa0f | 914 | f = fopen(filename, "r"); |
915 | if (!f) { | |
916 | perror(filename); | |
917 | exit(1); | |
918 | } | |
919 | linenum = 0; | |
920 | while (fgets(line, sizeof(line), f)) { | |
921 | /* Update line number counter. */ | |
922 | linenum++; | |
923 | if (process_server_config_line(options, line, filename, linenum) != 0) | |
924 | bad_options++; | |
8efc0c15 | 925 | } |
5260325f | 926 | fclose(f); |
b7c70970 | 927 | if (bad_options > 0) |
928 | fatal("%s: terminating, %d bad configuration options", | |
929 | filename, bad_options); | |
8efc0c15 | 930 | } |