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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" | |
0608f8a7 | 13 | RCSID("$OpenBSD: servconf.c,v 1.118 2003/04/09 08:23:52 hin Exp $"); |
42f11eb2 | 14 | |
12928e80 | 15 | #if defined(KRB4) |
42f11eb2 | 16 | #include <krb.h> |
17 | #endif | |
0608f8a7 | 18 | |
12928e80 | 19 | #if defined(KRB5) |
0608f8a7 | 20 | # ifdef HEIMDAL |
21 | # include <krb.h> | |
22 | # else | |
23 | /* | |
24 | * XXX: Bodge - but then, so is using the kerberos IV KEYFILE to get a | |
25 | * Kerberos V keytab | |
26 | */ | |
27 | # define KEYFILE "/etc/krb5.keytab" | |
28 | # endif | |
12928e80 | 29 | #endif |
0608f8a7 | 30 | |
83f46621 | 31 | #ifdef AFS |
32 | #include <kafs.h> | |
33 | #endif | |
8efc0c15 | 34 | |
35 | #include "ssh.h" | |
42f11eb2 | 36 | #include "log.h" |
8efc0c15 | 37 | #include "servconf.h" |
38 | #include "xmalloc.h" | |
a8be9f80 | 39 | #include "compat.h" |
42f11eb2 | 40 | #include "pathnames.h" |
41 | #include "tildexpand.h" | |
42 | #include "misc.h" | |
43 | #include "cipher.h" | |
b2552997 | 44 | #include "kex.h" |
45 | #include "mac.h" | |
42f11eb2 | 46 | |
396c147e | 47 | static void add_listen_addr(ServerOptions *, char *, u_short); |
48 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
48e671d5 | 49 | |
42f11eb2 | 50 | /* AF_UNSPEC or AF_INET or AF_INET6 */ |
51 | extern int IPv4or6; | |
1853d1ef | 52 | /* Use of privilege separation or not */ |
53 | extern int use_privsep; | |
42f11eb2 | 54 | |
8efc0c15 | 55 | /* Initializes the server options to their default values. */ |
56 | ||
6ae2364d | 57 | void |
5260325f | 58 | initialize_server_options(ServerOptions *options) |
8efc0c15 | 59 | { |
5260325f | 60 | memset(options, 0, sizeof(*options)); |
e15895cd | 61 | |
62 | /* Portable-specific options */ | |
63 | options->pam_authentication_via_kbd_int = -1; | |
64 | ||
65 | /* Standard Options */ | |
48e671d5 | 66 | options->num_ports = 0; |
67 | options->ports_from_cmdline = 0; | |
68 | options->listen_addrs = NULL; | |
fa08c86b | 69 | options->num_host_key_files = 0; |
0fbe8c74 | 70 | options->pid_file = NULL; |
5260325f | 71 | options->server_key_bits = -1; |
72 | options->login_grace_time = -1; | |
73 | options->key_regeneration_time = -1; | |
15853e93 | 74 | options->permit_root_login = PERMIT_NOT_SET; |
5260325f | 75 | options->ignore_rhosts = -1; |
76 | options->ignore_user_known_hosts = -1; | |
77 | options->print_motd = -1; | |
4f4648f9 | 78 | options->print_lastlog = -1; |
5260325f | 79 | options->x11_forwarding = -1; |
80 | options->x11_display_offset = -1; | |
e6e573bd | 81 | options->x11_use_localhost = -1; |
fa649821 | 82 | options->xauth_location = NULL; |
5260325f | 83 | options->strict_modes = -1; |
84 | options->keepalives = -1; | |
5eaf8578 | 85 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
86 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
5260325f | 87 | options->rhosts_authentication = -1; |
88 | options->rhosts_rsa_authentication = -1; | |
8002af61 | 89 | options->hostbased_authentication = -1; |
90 | options->hostbased_uses_name_from_packet_only = -1; | |
5260325f | 91 | options->rsa_authentication = -1; |
fa08c86b | 92 | options->pubkey_authentication = -1; |
ced49be2 | 93 | #if defined(KRB4) || defined(KRB5) |
5260325f | 94 | options->kerberos_authentication = -1; |
95 | options->kerberos_or_local_passwd = -1; | |
96 | options->kerberos_ticket_cleanup = -1; | |
8efc0c15 | 97 | #endif |
ced49be2 | 98 | #if defined(AFS) || defined(KRB5) |
5260325f | 99 | options->kerberos_tgt_passing = -1; |
ced49be2 | 100 | #endif |
101 | #ifdef AFS | |
5260325f | 102 | options->afs_token_passing = -1; |
8efc0c15 | 103 | #endif |
5260325f | 104 | options->password_authentication = -1; |
94ec8c6b | 105 | options->kbd_interactive_authentication = -1; |
5ba55ada | 106 | options->challenge_response_authentication = -1; |
5260325f | 107 | options->permit_empty_passwd = -1; |
f00bab84 | 108 | options->permit_user_env = -1; |
5260325f | 109 | options->use_login = -1; |
636f76ca | 110 | options->compression = -1; |
33de75a3 | 111 | options->allow_tcp_forwarding = -1; |
5260325f | 112 | options->num_allow_users = 0; |
113 | options->num_deny_users = 0; | |
114 | options->num_allow_groups = 0; | |
115 | options->num_deny_groups = 0; | |
a8be9f80 | 116 | options->ciphers = NULL; |
b2552997 | 117 | options->macs = NULL; |
a8be9f80 | 118 | options->protocol = SSH_PROTO_UNKNOWN; |
1d1ffb87 | 119 | options->gateway_ports = -1; |
38c295d6 | 120 | options->num_subsystems = 0; |
c345cf9d | 121 | options->max_startups_begin = -1; |
122 | options->max_startups_rate = -1; | |
089fbbd2 | 123 | options->max_startups = -1; |
eea39c02 | 124 | options->banner = NULL; |
bf4c5edc | 125 | options->verify_reverse_mapping = -1; |
3ffc6336 | 126 | options->client_alive_interval = -1; |
127 | options->client_alive_count_max = -1; | |
c8445989 | 128 | options->authorized_keys_file = NULL; |
129 | options->authorized_keys_file2 = NULL; | |
1853d1ef | 130 | |
1853d1ef | 131 | /* Needs to be accessable in many places */ |
132 | use_privsep = -1; | |
8efc0c15 | 133 | } |
134 | ||
6ae2364d | 135 | void |
5260325f | 136 | fill_default_server_options(ServerOptions *options) |
8efc0c15 | 137 | { |
e15895cd | 138 | /* Portable-specific options */ |
139 | if (options->pam_authentication_via_kbd_int == -1) | |
140 | options->pam_authentication_via_kbd_int = 0; | |
141 | ||
142 | /* Standard Options */ | |
fa08c86b | 143 | if (options->protocol == SSH_PROTO_UNKNOWN) |
144 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
145 | if (options->num_host_key_files == 0) { | |
146 | /* fill default hostkeys for protocols */ | |
147 | if (options->protocol & SSH_PROTO_1) | |
0f84fe37 | 148 | options->host_key_files[options->num_host_key_files++] = |
149 | _PATH_HOST_KEY_FILE; | |
150 | if (options->protocol & SSH_PROTO_2) { | |
151 | options->host_key_files[options->num_host_key_files++] = | |
152 | _PATH_HOST_RSA_KEY_FILE; | |
153 | options->host_key_files[options->num_host_key_files++] = | |
154 | _PATH_HOST_DSA_KEY_FILE; | |
155 | } | |
fa08c86b | 156 | } |
48e671d5 | 157 | if (options->num_ports == 0) |
158 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
159 | if (options->listen_addrs == NULL) | |
2d2a2c65 | 160 | add_listen_addr(options, NULL, 0); |
0fbe8c74 | 161 | if (options->pid_file == NULL) |
42f11eb2 | 162 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
5260325f | 163 | if (options->server_key_bits == -1) |
164 | options->server_key_bits = 768; | |
165 | if (options->login_grace_time == -1) | |
3445ca02 | 166 | options->login_grace_time = 120; |
5260325f | 167 | if (options->key_regeneration_time == -1) |
168 | options->key_regeneration_time = 3600; | |
15853e93 | 169 | if (options->permit_root_login == PERMIT_NOT_SET) |
170 | options->permit_root_login = PERMIT_YES; | |
5260325f | 171 | if (options->ignore_rhosts == -1) |
c8d54615 | 172 | options->ignore_rhosts = 1; |
5260325f | 173 | if (options->ignore_user_known_hosts == -1) |
174 | options->ignore_user_known_hosts = 0; | |
5260325f | 175 | if (options->print_motd == -1) |
176 | options->print_motd = 1; | |
4f4648f9 | 177 | if (options->print_lastlog == -1) |
178 | options->print_lastlog = 1; | |
5260325f | 179 | if (options->x11_forwarding == -1) |
c8d54615 | 180 | options->x11_forwarding = 0; |
5260325f | 181 | if (options->x11_display_offset == -1) |
c8d54615 | 182 | options->x11_display_offset = 10; |
e6e573bd | 183 | if (options->x11_use_localhost == -1) |
184 | options->x11_use_localhost = 1; | |
fa649821 | 185 | if (options->xauth_location == NULL) |
fd9ede94 | 186 | options->xauth_location = _PATH_XAUTH; |
5260325f | 187 | if (options->strict_modes == -1) |
188 | options->strict_modes = 1; | |
189 | if (options->keepalives == -1) | |
190 | options->keepalives = 1; | |
5eaf8578 | 191 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
5260325f | 192 | options->log_facility = SYSLOG_FACILITY_AUTH; |
5eaf8578 | 193 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 194 | options->log_level = SYSLOG_LEVEL_INFO; |
5260325f | 195 | if (options->rhosts_authentication == -1) |
196 | options->rhosts_authentication = 0; | |
197 | if (options->rhosts_rsa_authentication == -1) | |
c8d54615 | 198 | options->rhosts_rsa_authentication = 0; |
8002af61 | 199 | if (options->hostbased_authentication == -1) |
200 | options->hostbased_authentication = 0; | |
201 | if (options->hostbased_uses_name_from_packet_only == -1) | |
202 | options->hostbased_uses_name_from_packet_only = 0; | |
5260325f | 203 | if (options->rsa_authentication == -1) |
204 | options->rsa_authentication = 1; | |
fa08c86b | 205 | if (options->pubkey_authentication == -1) |
206 | options->pubkey_authentication = 1; | |
ced49be2 | 207 | #if defined(KRB4) || defined(KRB5) |
5260325f | 208 | if (options->kerberos_authentication == -1) |
eadc806d | 209 | options->kerberos_authentication = 0; |
5260325f | 210 | if (options->kerberos_or_local_passwd == -1) |
211 | options->kerberos_or_local_passwd = 1; | |
212 | if (options->kerberos_ticket_cleanup == -1) | |
213 | options->kerberos_ticket_cleanup = 1; | |
ced49be2 | 214 | #endif |
215 | #if defined(AFS) || defined(KRB5) | |
5260325f | 216 | if (options->kerberos_tgt_passing == -1) |
217 | options->kerberos_tgt_passing = 0; | |
ced49be2 | 218 | #endif |
184eed6a | 219 | #ifdef AFS |
5260325f | 220 | if (options->afs_token_passing == -1) |
1c3454e7 | 221 | options->afs_token_passing = 0; |
ced49be2 | 222 | #endif |
5260325f | 223 | if (options->password_authentication == -1) |
224 | options->password_authentication = 1; | |
94ec8c6b | 225 | if (options->kbd_interactive_authentication == -1) |
226 | options->kbd_interactive_authentication = 0; | |
5ba55ada | 227 | if (options->challenge_response_authentication == -1) |
228 | options->challenge_response_authentication = 1; | |
5260325f | 229 | if (options->permit_empty_passwd == -1) |
c8d54615 | 230 | options->permit_empty_passwd = 0; |
f00bab84 | 231 | if (options->permit_user_env == -1) |
232 | options->permit_user_env = 0; | |
5260325f | 233 | if (options->use_login == -1) |
234 | options->use_login = 0; | |
636f76ca | 235 | if (options->compression == -1) |
236 | options->compression = 1; | |
33de75a3 | 237 | if (options->allow_tcp_forwarding == -1) |
238 | options->allow_tcp_forwarding = 1; | |
1d1ffb87 | 239 | if (options->gateway_ports == -1) |
240 | options->gateway_ports = 0; | |
089fbbd2 | 241 | if (options->max_startups == -1) |
242 | options->max_startups = 10; | |
c345cf9d | 243 | if (options->max_startups_rate == -1) |
244 | options->max_startups_rate = 100; /* 100% */ | |
245 | if (options->max_startups_begin == -1) | |
246 | options->max_startups_begin = options->max_startups; | |
bf4c5edc | 247 | if (options->verify_reverse_mapping == -1) |
248 | options->verify_reverse_mapping = 0; | |
3ffc6336 | 249 | if (options->client_alive_interval == -1) |
184eed6a | 250 | options->client_alive_interval = 0; |
3ffc6336 | 251 | if (options->client_alive_count_max == -1) |
252 | options->client_alive_count_max = 3; | |
5df83e07 | 253 | if (options->authorized_keys_file2 == NULL) { |
254 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
255 | if (options->authorized_keys_file != NULL) | |
256 | options->authorized_keys_file2 = options->authorized_keys_file; | |
257 | else | |
258 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
259 | } | |
260 | if (options->authorized_keys_file == NULL) | |
261 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
1853d1ef | 262 | |
2ee1b704 | 263 | /* Turn privilege separation on by default */ |
1853d1ef | 264 | if (use_privsep == -1) |
2ee1b704 | 265 | use_privsep = 1; |
e299a298 | 266 | |
4165b82e | 267 | #ifndef HAVE_MMAP |
e299a298 | 268 | if (use_privsep && options->compression == 1) { |
269 | error("This platform does not support both privilege " | |
270 | "separation and compression"); | |
271 | error("Compression disabled"); | |
272 | options->compression = 0; | |
273 | } | |
274 | #endif | |
275 | ||
8efc0c15 | 276 | } |
277 | ||
8efc0c15 | 278 | /* Keyword tokens. */ |
5260325f | 279 | typedef enum { |
280 | sBadOption, /* == unknown option */ | |
e15895cd | 281 | /* Portable-specific options */ |
282 | sPAMAuthenticationViaKbdInt, | |
283 | /* Standard Options */ | |
5260325f | 284 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, |
285 | sPermitRootLogin, sLogFacility, sLogLevel, | |
286 | sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, | |
ced49be2 | 287 | #if defined(KRB4) || defined(KRB5) |
5260325f | 288 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
8efc0c15 | 289 | #endif |
ced49be2 | 290 | #if defined(AFS) || defined(KRB5) |
291 | sKerberosTgtPassing, | |
292 | #endif | |
8efc0c15 | 293 | #ifdef AFS |
ced49be2 | 294 | sAFSTokenPassing, |
8efc0c15 | 295 | #endif |
d464095c | 296 | sChallengeResponseAuthentication, |
94ec8c6b | 297 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, |
4f4648f9 | 298 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e6e573bd | 299 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
5c53a31e | 300 | sStrictModes, sEmptyPasswd, sKeepAlives, |
f00bab84 | 301 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
33de75a3 | 302 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
b2552997 | 303 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
fa08c86b | 304 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, |
bf4c5edc | 305 | sBanner, sVerifyReverseMapping, sHostbasedAuthentication, |
184eed6a | 306 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
c8445989 | 307 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
2ea6de2b | 308 | sUsePrivilegeSeparation, |
2717fa0f | 309 | sDeprecated |
8efc0c15 | 310 | } ServerOpCodes; |
311 | ||
312 | /* Textual representation of the tokens. */ | |
5260325f | 313 | static struct { |
314 | const char *name; | |
315 | ServerOpCodes opcode; | |
316 | } keywords[] = { | |
e15895cd | 317 | /* Portable-specific options */ |
318 | { "PAMAuthenticationViaKbdInt", sPAMAuthenticationViaKbdInt }, | |
319 | /* Standard Options */ | |
5260325f | 320 | { "port", sPort }, |
321 | { "hostkey", sHostKeyFile }, | |
fa08c86b | 322 | { "hostdsakey", sHostKeyFile }, /* alias */ |
2b87da3b | 323 | { "pidfile", sPidFile }, |
5260325f | 324 | { "serverkeybits", sServerKeyBits }, |
325 | { "logingracetime", sLoginGraceTime }, | |
326 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
327 | { "permitrootlogin", sPermitRootLogin }, | |
328 | { "syslogfacility", sLogFacility }, | |
329 | { "loglevel", sLogLevel }, | |
330 | { "rhostsauthentication", sRhostsAuthentication }, | |
331 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, | |
8002af61 | 332 | { "hostbasedauthentication", sHostbasedAuthentication }, |
333 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, | |
5260325f | 334 | { "rsaauthentication", sRSAAuthentication }, |
fa08c86b | 335 | { "pubkeyauthentication", sPubkeyAuthentication }, |
336 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
ced49be2 | 337 | #if defined(KRB4) || defined(KRB5) |
5260325f | 338 | { "kerberosauthentication", sKerberosAuthentication }, |
339 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
340 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
8efc0c15 | 341 | #endif |
ced49be2 | 342 | #if defined(AFS) || defined(KRB5) |
5260325f | 343 | { "kerberostgtpassing", sKerberosTgtPassing }, |
ced49be2 | 344 | #endif |
345 | #ifdef AFS | |
5260325f | 346 | { "afstokenpassing", sAFSTokenPassing }, |
8efc0c15 | 347 | #endif |
5260325f | 348 | { "passwordauthentication", sPasswordAuthentication }, |
94ec8c6b | 349 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, |
d464095c | 350 | { "challengeresponseauthentication", sChallengeResponseAuthentication }, |
351 | { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ | |
5c53a31e | 352 | { "checkmail", sDeprecated }, |
5260325f | 353 | { "listenaddress", sListenAddress }, |
354 | { "printmotd", sPrintMotd }, | |
4f4648f9 | 355 | { "printlastlog", sPrintLastLog }, |
5260325f | 356 | { "ignorerhosts", sIgnoreRhosts }, |
357 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
358 | { "x11forwarding", sX11Forwarding }, | |
359 | { "x11displayoffset", sX11DisplayOffset }, | |
e6e573bd | 360 | { "x11uselocalhost", sX11UseLocalhost }, |
fa649821 | 361 | { "xauthlocation", sXAuthLocation }, |
5260325f | 362 | { "strictmodes", sStrictModes }, |
363 | { "permitemptypasswords", sEmptyPasswd }, | |
f00bab84 | 364 | { "permituserenvironment", sPermitUserEnvironment }, |
5260325f | 365 | { "uselogin", sUseLogin }, |
636f76ca | 366 | { "compression", sCompression }, |
5260325f | 367 | { "keepalive", sKeepAlives }, |
33de75a3 | 368 | { "allowtcpforwarding", sAllowTcpForwarding }, |
5260325f | 369 | { "allowusers", sAllowUsers }, |
370 | { "denyusers", sDenyUsers }, | |
371 | { "allowgroups", sAllowGroups }, | |
372 | { "denygroups", sDenyGroups }, | |
a8be9f80 | 373 | { "ciphers", sCiphers }, |
b2552997 | 374 | { "macs", sMacs }, |
a8be9f80 | 375 | { "protocol", sProtocol }, |
1d1ffb87 | 376 | { "gatewayports", sGatewayPorts }, |
38c295d6 | 377 | { "subsystem", sSubsystem }, |
089fbbd2 | 378 | { "maxstartups", sMaxStartups }, |
eea39c02 | 379 | { "banner", sBanner }, |
bf4c5edc | 380 | { "verifyreversemapping", sVerifyReverseMapping }, |
381 | { "reversemappingcheck", sVerifyReverseMapping }, | |
3ffc6336 | 382 | { "clientaliveinterval", sClientAliveInterval }, |
383 | { "clientalivecountmax", sClientAliveCountMax }, | |
c8445989 | 384 | { "authorizedkeysfile", sAuthorizedKeysFile }, |
385 | { "authorizedkeysfile2", sAuthorizedKeysFile2 }, | |
1853d1ef | 386 | { "useprivilegeseparation", sUsePrivilegeSeparation}, |
17a3011c | 387 | { NULL, sBadOption } |
8efc0c15 | 388 | }; |
389 | ||
aa3378df | 390 | /* |
6be9a5e8 | 391 | * Returns the number of the token pointed to by cp or sBadOption. |
aa3378df | 392 | */ |
8efc0c15 | 393 | |
6ae2364d | 394 | static ServerOpCodes |
5260325f | 395 | parse_token(const char *cp, const char *filename, |
396 | int linenum) | |
8efc0c15 | 397 | { |
1e3b8b07 | 398 | u_int i; |
8efc0c15 | 399 | |
5260325f | 400 | for (i = 0; keywords[i].name; i++) |
aa3378df | 401 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 402 | return keywords[i].opcode; |
8efc0c15 | 403 | |
b7c70970 | 404 | error("%s: line %d: Bad configuration option: %s", |
405 | filename, linenum, cp); | |
5260325f | 406 | return sBadOption; |
8efc0c15 | 407 | } |
408 | ||
396c147e | 409 | static void |
2d2a2c65 | 410 | add_listen_addr(ServerOptions *options, char *addr, u_short port) |
48e671d5 | 411 | { |
48e671d5 | 412 | int i; |
413 | ||
414 | if (options->num_ports == 0) | |
415 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
2d2a2c65 | 416 | if (port == 0) |
d11c1288 | 417 | for (i = 0; i < options->num_ports; i++) |
418 | add_one_listen_addr(options, addr, options->ports[i]); | |
419 | else | |
2d2a2c65 | 420 | add_one_listen_addr(options, addr, port); |
d11c1288 | 421 | } |
422 | ||
396c147e | 423 | static void |
d11c1288 | 424 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) |
425 | { | |
426 | struct addrinfo hints, *ai, *aitop; | |
427 | char strport[NI_MAXSERV]; | |
428 | int gaierr; | |
429 | ||
430 | memset(&hints, 0, sizeof(hints)); | |
431 | hints.ai_family = IPv4or6; | |
432 | hints.ai_socktype = SOCK_STREAM; | |
433 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
7528d467 | 434 | snprintf(strport, sizeof strport, "%u", port); |
d11c1288 | 435 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
436 | fatal("bad addr or host: %s (%s)", | |
437 | addr ? addr : "<NULL>", | |
438 | gai_strerror(gaierr)); | |
439 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
440 | ; | |
441 | ai->ai_next = options->listen_addrs; | |
442 | options->listen_addrs = aitop; | |
48e671d5 | 443 | } |
444 | ||
2717fa0f | 445 | int |
446 | process_server_config_line(ServerOptions *options, char *line, | |
447 | const char *filename, int linenum) | |
8efc0c15 | 448 | { |
d11c1288 | 449 | char *cp, **charptr, *arg, *p; |
7528d467 | 450 | int *intptr, value, i, n; |
5260325f | 451 | ServerOpCodes opcode; |
452 | ||
2717fa0f | 453 | cp = line; |
454 | arg = strdelim(&cp); | |
455 | /* Ignore leading whitespace */ | |
456 | if (*arg == '\0') | |
704b1659 | 457 | arg = strdelim(&cp); |
2717fa0f | 458 | if (!arg || !*arg || *arg == '#') |
459 | return 0; | |
460 | intptr = NULL; | |
461 | charptr = NULL; | |
462 | opcode = parse_token(arg, filename, linenum); | |
463 | switch (opcode) { | |
464 | /* Portable-specific options */ | |
465 | case sPAMAuthenticationViaKbdInt: | |
466 | intptr = &options->pam_authentication_via_kbd_int; | |
467 | goto parse_flag; | |
48e671d5 | 468 | |
2717fa0f | 469 | /* Standard Options */ |
470 | case sBadOption: | |
471 | return -1; | |
472 | case sPort: | |
473 | /* ignore ports from configfile if cmdline specifies ports */ | |
474 | if (options->ports_from_cmdline) | |
475 | return 0; | |
476 | if (options->listen_addrs != NULL) | |
477 | fatal("%s line %d: ports must be specified before " | |
3a454b6a | 478 | "ListenAddress.", filename, linenum); |
2717fa0f | 479 | if (options->num_ports >= MAX_PORTS) |
480 | fatal("%s line %d: too many ports.", | |
481 | filename, linenum); | |
482 | arg = strdelim(&cp); | |
483 | if (!arg || *arg == '\0') | |
484 | fatal("%s line %d: missing port number.", | |
485 | filename, linenum); | |
486 | options->ports[options->num_ports++] = a2port(arg); | |
487 | if (options->ports[options->num_ports-1] == 0) | |
488 | fatal("%s line %d: Badly formatted port number.", | |
489 | filename, linenum); | |
490 | break; | |
491 | ||
492 | case sServerKeyBits: | |
493 | intptr = &options->server_key_bits; | |
5260325f | 494 | parse_int: |
2717fa0f | 495 | arg = strdelim(&cp); |
496 | if (!arg || *arg == '\0') | |
497 | fatal("%s line %d: missing integer value.", | |
498 | filename, linenum); | |
499 | value = atoi(arg); | |
500 | if (*intptr == -1) | |
501 | *intptr = value; | |
502 | break; | |
503 | ||
504 | case sLoginGraceTime: | |
505 | intptr = &options->login_grace_time; | |
e2b1fb42 | 506 | parse_time: |
2717fa0f | 507 | arg = strdelim(&cp); |
508 | if (!arg || *arg == '\0') | |
509 | fatal("%s line %d: missing time value.", | |
510 | filename, linenum); | |
511 | if ((value = convtime(arg)) == -1) | |
512 | fatal("%s line %d: invalid time value.", | |
513 | filename, linenum); | |
514 | if (*intptr == -1) | |
515 | *intptr = value; | |
516 | break; | |
517 | ||
518 | case sKeyRegenerationTime: | |
519 | intptr = &options->key_regeneration_time; | |
520 | goto parse_time; | |
521 | ||
522 | case sListenAddress: | |
523 | arg = strdelim(&cp); | |
524 | if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0) | |
525 | fatal("%s line %d: missing inet addr.", | |
526 | filename, linenum); | |
527 | if (*arg == '[') { | |
528 | if ((p = strchr(arg, ']')) == NULL) | |
529 | fatal("%s line %d: bad ipv6 inet addr usage.", | |
e2b1fb42 | 530 | filename, linenum); |
2717fa0f | 531 | arg++; |
532 | memmove(p, p+1, strlen(p+1)+1); | |
533 | } else if (((p = strchr(arg, ':')) == NULL) || | |
534 | (strchr(p+1, ':') != NULL)) { | |
535 | add_listen_addr(options, arg, 0); | |
e2b1fb42 | 536 | break; |
2717fa0f | 537 | } |
538 | if (*p == ':') { | |
539 | u_short port; | |
5260325f | 540 | |
2717fa0f | 541 | p++; |
542 | if (*p == '\0') | |
543 | fatal("%s line %d: bad inet addr:port usage.", | |
48e671d5 | 544 | filename, linenum); |
2717fa0f | 545 | else { |
546 | *(p-1) = '\0'; | |
547 | if ((port = a2port(p)) == 0) | |
548 | fatal("%s line %d: bad port number.", | |
d11c1288 | 549 | filename, linenum); |
2717fa0f | 550 | add_listen_addr(options, arg, port); |
d11c1288 | 551 | } |
2717fa0f | 552 | } else if (*p == '\0') |
553 | add_listen_addr(options, arg, 0); | |
554 | else | |
555 | fatal("%s line %d: bad inet addr usage.", | |
556 | filename, linenum); | |
557 | break; | |
558 | ||
559 | case sHostKeyFile: | |
560 | intptr = &options->num_host_key_files; | |
561 | if (*intptr >= MAX_HOSTKEYS) | |
562 | fatal("%s line %d: too many host keys specified (max %d).", | |
563 | filename, linenum, MAX_HOSTKEYS); | |
564 | charptr = &options->host_key_files[*intptr]; | |
fa649821 | 565 | parse_filename: |
2717fa0f | 566 | arg = strdelim(&cp); |
567 | if (!arg || *arg == '\0') | |
568 | fatal("%s line %d: missing file name.", | |
569 | filename, linenum); | |
570 | if (*charptr == NULL) { | |
571 | *charptr = tilde_expand_filename(arg, getuid()); | |
572 | /* increase optional counter */ | |
573 | if (intptr != NULL) | |
574 | *intptr = *intptr + 1; | |
575 | } | |
576 | break; | |
0fbe8c74 | 577 | |
2717fa0f | 578 | case sPidFile: |
579 | charptr = &options->pid_file; | |
580 | goto parse_filename; | |
5260325f | 581 | |
2717fa0f | 582 | case sPermitRootLogin: |
583 | intptr = &options->permit_root_login; | |
584 | arg = strdelim(&cp); | |
585 | if (!arg || *arg == '\0') | |
586 | fatal("%s line %d: missing yes/" | |
587 | "without-password/forced-commands-only/no " | |
588 | "argument.", filename, linenum); | |
589 | value = 0; /* silence compiler */ | |
590 | if (strcmp(arg, "without-password") == 0) | |
591 | value = PERMIT_NO_PASSWD; | |
592 | else if (strcmp(arg, "forced-commands-only") == 0) | |
593 | value = PERMIT_FORCED_ONLY; | |
594 | else if (strcmp(arg, "yes") == 0) | |
595 | value = PERMIT_YES; | |
596 | else if (strcmp(arg, "no") == 0) | |
597 | value = PERMIT_NO; | |
598 | else | |
599 | fatal("%s line %d: Bad yes/" | |
600 | "without-password/forced-commands-only/no " | |
601 | "argument: %s", filename, linenum, arg); | |
602 | if (*intptr == -1) | |
603 | *intptr = value; | |
604 | break; | |
605 | ||
606 | case sIgnoreRhosts: | |
607 | intptr = &options->ignore_rhosts; | |
5260325f | 608 | parse_flag: |
2717fa0f | 609 | arg = strdelim(&cp); |
610 | if (!arg || *arg == '\0') | |
611 | fatal("%s line %d: missing yes/no argument.", | |
612 | filename, linenum); | |
613 | value = 0; /* silence compiler */ | |
614 | if (strcmp(arg, "yes") == 0) | |
615 | value = 1; | |
616 | else if (strcmp(arg, "no") == 0) | |
617 | value = 0; | |
618 | else | |
619 | fatal("%s line %d: Bad yes/no argument: %s", | |
620 | filename, linenum, arg); | |
621 | if (*intptr == -1) | |
622 | *intptr = value; | |
623 | break; | |
624 | ||
625 | case sIgnoreUserKnownHosts: | |
626 | intptr = &options->ignore_user_known_hosts; | |
627 | goto parse_flag; | |
628 | ||
629 | case sRhostsAuthentication: | |
630 | intptr = &options->rhosts_authentication; | |
631 | goto parse_flag; | |
632 | ||
633 | case sRhostsRSAAuthentication: | |
634 | intptr = &options->rhosts_rsa_authentication; | |
635 | goto parse_flag; | |
636 | ||
637 | case sHostbasedAuthentication: | |
638 | intptr = &options->hostbased_authentication; | |
639 | goto parse_flag; | |
640 | ||
641 | case sHostbasedUsesNameFromPacketOnly: | |
642 | intptr = &options->hostbased_uses_name_from_packet_only; | |
643 | goto parse_flag; | |
644 | ||
645 | case sRSAAuthentication: | |
646 | intptr = &options->rsa_authentication; | |
647 | goto parse_flag; | |
648 | ||
649 | case sPubkeyAuthentication: | |
650 | intptr = &options->pubkey_authentication; | |
651 | goto parse_flag; | |
652 | #if defined(KRB4) || defined(KRB5) | |
653 | case sKerberosAuthentication: | |
654 | intptr = &options->kerberos_authentication; | |
655 | goto parse_flag; | |
5260325f | 656 | |
2717fa0f | 657 | case sKerberosOrLocalPasswd: |
658 | intptr = &options->kerberos_or_local_passwd; | |
659 | goto parse_flag; | |
5260325f | 660 | |
2717fa0f | 661 | case sKerberosTicketCleanup: |
662 | intptr = &options->kerberos_ticket_cleanup; | |
663 | goto parse_flag; | |
664 | #endif | |
665 | #if defined(AFS) || defined(KRB5) | |
666 | case sKerberosTgtPassing: | |
667 | intptr = &options->kerberos_tgt_passing; | |
668 | goto parse_flag; | |
669 | #endif | |
670 | #ifdef AFS | |
671 | case sAFSTokenPassing: | |
672 | intptr = &options->afs_token_passing; | |
673 | goto parse_flag; | |
674 | #endif | |
5260325f | 675 | |
2717fa0f | 676 | case sPasswordAuthentication: |
677 | intptr = &options->password_authentication; | |
678 | goto parse_flag; | |
5260325f | 679 | |
2717fa0f | 680 | case sKbdInteractiveAuthentication: |
681 | intptr = &options->kbd_interactive_authentication; | |
682 | goto parse_flag; | |
8002af61 | 683 | |
2717fa0f | 684 | case sChallengeResponseAuthentication: |
685 | intptr = &options->challenge_response_authentication; | |
686 | goto parse_flag; | |
8002af61 | 687 | |
2717fa0f | 688 | case sPrintMotd: |
689 | intptr = &options->print_motd; | |
690 | goto parse_flag; | |
5260325f | 691 | |
2717fa0f | 692 | case sPrintLastLog: |
693 | intptr = &options->print_lastlog; | |
694 | goto parse_flag; | |
5260325f | 695 | |
2717fa0f | 696 | case sX11Forwarding: |
697 | intptr = &options->x11_forwarding; | |
698 | goto parse_flag; | |
5260325f | 699 | |
2717fa0f | 700 | case sX11DisplayOffset: |
701 | intptr = &options->x11_display_offset; | |
702 | goto parse_int; | |
8efc0c15 | 703 | |
e6e573bd | 704 | case sX11UseLocalhost: |
705 | intptr = &options->x11_use_localhost; | |
706 | goto parse_flag; | |
707 | ||
2717fa0f | 708 | case sXAuthLocation: |
709 | charptr = &options->xauth_location; | |
710 | goto parse_filename; | |
5260325f | 711 | |
2717fa0f | 712 | case sStrictModes: |
713 | intptr = &options->strict_modes; | |
714 | goto parse_flag; | |
5260325f | 715 | |
2717fa0f | 716 | case sKeepAlives: |
717 | intptr = &options->keepalives; | |
718 | goto parse_flag; | |
33de75a3 | 719 | |
2717fa0f | 720 | case sEmptyPasswd: |
721 | intptr = &options->permit_empty_passwd; | |
722 | goto parse_flag; | |
5260325f | 723 | |
f00bab84 | 724 | case sPermitUserEnvironment: |
725 | intptr = &options->permit_user_env; | |
726 | goto parse_flag; | |
727 | ||
2717fa0f | 728 | case sUseLogin: |
729 | intptr = &options->use_login; | |
730 | goto parse_flag; | |
5260325f | 731 | |
636f76ca | 732 | case sCompression: |
733 | intptr = &options->compression; | |
734 | goto parse_flag; | |
735 | ||
2717fa0f | 736 | case sGatewayPorts: |
737 | intptr = &options->gateway_ports; | |
738 | goto parse_flag; | |
5260325f | 739 | |
bf4c5edc | 740 | case sVerifyReverseMapping: |
741 | intptr = &options->verify_reverse_mapping; | |
2717fa0f | 742 | goto parse_flag; |
5260325f | 743 | |
2717fa0f | 744 | case sLogFacility: |
745 | intptr = (int *) &options->log_facility; | |
746 | arg = strdelim(&cp); | |
747 | value = log_facility_number(arg); | |
5eaf8578 | 748 | if (value == SYSLOG_FACILITY_NOT_SET) |
2717fa0f | 749 | fatal("%.200s line %d: unsupported log facility '%s'", |
750 | filename, linenum, arg ? arg : "<NONE>"); | |
751 | if (*intptr == -1) | |
752 | *intptr = (SyslogFacility) value; | |
753 | break; | |
754 | ||
755 | case sLogLevel: | |
756 | intptr = (int *) &options->log_level; | |
757 | arg = strdelim(&cp); | |
758 | value = log_level_number(arg); | |
5eaf8578 | 759 | if (value == SYSLOG_LEVEL_NOT_SET) |
2717fa0f | 760 | fatal("%.200s line %d: unsupported log level '%s'", |
761 | filename, linenum, arg ? arg : "<NONE>"); | |
762 | if (*intptr == -1) | |
763 | *intptr = (LogLevel) value; | |
764 | break; | |
765 | ||
766 | case sAllowTcpForwarding: | |
767 | intptr = &options->allow_tcp_forwarding; | |
768 | goto parse_flag; | |
769 | ||
1853d1ef | 770 | case sUsePrivilegeSeparation: |
771 | intptr = &use_privsep; | |
772 | goto parse_flag; | |
773 | ||
2717fa0f | 774 | case sAllowUsers: |
775 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
776 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
777 | fatal("%s line %d: too many allow users.", | |
778 | filename, linenum); | |
7528d467 | 779 | options->allow_users[options->num_allow_users++] = |
780 | xstrdup(arg); | |
2717fa0f | 781 | } |
782 | break; | |
a8be9f80 | 783 | |
2717fa0f | 784 | case sDenyUsers: |
785 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
786 | if (options->num_deny_users >= MAX_DENY_USERS) | |
787 | fatal( "%s line %d: too many deny users.", | |
788 | filename, linenum); | |
7528d467 | 789 | options->deny_users[options->num_deny_users++] = |
790 | xstrdup(arg); | |
2717fa0f | 791 | } |
792 | break; | |
b2552997 | 793 | |
2717fa0f | 794 | case sAllowGroups: |
795 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
796 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
797 | fatal("%s line %d: too many allow groups.", | |
798 | filename, linenum); | |
7528d467 | 799 | options->allow_groups[options->num_allow_groups++] = |
800 | xstrdup(arg); | |
2717fa0f | 801 | } |
802 | break; | |
a8be9f80 | 803 | |
2717fa0f | 804 | case sDenyGroups: |
805 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
806 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
807 | fatal("%s line %d: too many deny groups.", | |
808 | filename, linenum); | |
809 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
810 | } | |
811 | break; | |
38c295d6 | 812 | |
2717fa0f | 813 | case sCiphers: |
814 | arg = strdelim(&cp); | |
815 | if (!arg || *arg == '\0') | |
816 | fatal("%s line %d: Missing argument.", filename, linenum); | |
817 | if (!ciphers_valid(arg)) | |
818 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
819 | filename, linenum, arg ? arg : "<NONE>"); | |
820 | if (options->ciphers == NULL) | |
821 | options->ciphers = xstrdup(arg); | |
822 | break; | |
823 | ||
824 | case sMacs: | |
825 | arg = strdelim(&cp); | |
826 | if (!arg || *arg == '\0') | |
827 | fatal("%s line %d: Missing argument.", filename, linenum); | |
828 | if (!mac_valid(arg)) | |
829 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
830 | filename, linenum, arg ? arg : "<NONE>"); | |
831 | if (options->macs == NULL) | |
832 | options->macs = xstrdup(arg); | |
833 | break; | |
834 | ||
835 | case sProtocol: | |
836 | intptr = &options->protocol; | |
837 | arg = strdelim(&cp); | |
838 | if (!arg || *arg == '\0') | |
839 | fatal("%s line %d: Missing argument.", filename, linenum); | |
840 | value = proto_spec(arg); | |
841 | if (value == SSH_PROTO_UNKNOWN) | |
842 | fatal("%s line %d: Bad protocol spec '%s'.", | |
184eed6a | 843 | filename, linenum, arg ? arg : "<NONE>"); |
2717fa0f | 844 | if (*intptr == SSH_PROTO_UNKNOWN) |
845 | *intptr = value; | |
846 | break; | |
847 | ||
848 | case sSubsystem: | |
849 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
850 | fatal("%s line %d: too many subsystems defined.", | |
184eed6a | 851 | filename, linenum); |
2717fa0f | 852 | } |
853 | arg = strdelim(&cp); | |
854 | if (!arg || *arg == '\0') | |
855 | fatal("%s line %d: Missing subsystem name.", | |
184eed6a | 856 | filename, linenum); |
2717fa0f | 857 | for (i = 0; i < options->num_subsystems; i++) |
858 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
859 | fatal("%s line %d: Subsystem '%s' already defined.", | |
184eed6a | 860 | filename, linenum, arg); |
2717fa0f | 861 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); |
862 | arg = strdelim(&cp); | |
863 | if (!arg || *arg == '\0') | |
864 | fatal("%s line %d: Missing subsystem command.", | |
184eed6a | 865 | filename, linenum); |
2717fa0f | 866 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); |
867 | options->num_subsystems++; | |
868 | break; | |
869 | ||
870 | case sMaxStartups: | |
871 | arg = strdelim(&cp); | |
872 | if (!arg || *arg == '\0') | |
873 | fatal("%s line %d: Missing MaxStartups spec.", | |
184eed6a | 874 | filename, linenum); |
2717fa0f | 875 | if ((n = sscanf(arg, "%d:%d:%d", |
876 | &options->max_startups_begin, | |
877 | &options->max_startups_rate, | |
878 | &options->max_startups)) == 3) { | |
879 | if (options->max_startups_begin > | |
880 | options->max_startups || | |
881 | options->max_startups_rate > 100 || | |
882 | options->max_startups_rate < 1) | |
c345cf9d | 883 | fatal("%s line %d: Illegal MaxStartups spec.", |
97de229c | 884 | filename, linenum); |
2717fa0f | 885 | } else if (n != 1) |
886 | fatal("%s line %d: Illegal MaxStartups spec.", | |
887 | filename, linenum); | |
888 | else | |
889 | options->max_startups = options->max_startups_begin; | |
890 | break; | |
891 | ||
892 | case sBanner: | |
893 | charptr = &options->banner; | |
894 | goto parse_filename; | |
895 | /* | |
896 | * These options can contain %X options expanded at | |
897 | * connect time, so that you can specify paths like: | |
898 | * | |
899 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
900 | */ | |
901 | case sAuthorizedKeysFile: | |
902 | case sAuthorizedKeysFile2: | |
903 | charptr = (opcode == sAuthorizedKeysFile ) ? | |
904 | &options->authorized_keys_file : | |
905 | &options->authorized_keys_file2; | |
906 | goto parse_filename; | |
907 | ||
908 | case sClientAliveInterval: | |
909 | intptr = &options->client_alive_interval; | |
910 | goto parse_time; | |
911 | ||
912 | case sClientAliveCountMax: | |
913 | intptr = &options->client_alive_count_max; | |
914 | goto parse_int; | |
915 | ||
916 | case sDeprecated: | |
bbe88b6d | 917 | logit("%s line %d: Deprecated option %s", |
2717fa0f | 918 | filename, linenum, arg); |
919 | while (arg) | |
920 | arg = strdelim(&cp); | |
921 | break; | |
922 | ||
923 | default: | |
924 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
925 | filename, linenum, arg, opcode); | |
926 | } | |
927 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
928 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
929 | filename, linenum, arg); | |
930 | return 0; | |
931 | } | |
089fbbd2 | 932 | |
2717fa0f | 933 | /* Reads the server configuration file. */ |
5c53a31e | 934 | |
2717fa0f | 935 | void |
936 | read_server_config(ServerOptions *options, const char *filename) | |
937 | { | |
7528d467 | 938 | int linenum, bad_options = 0; |
2717fa0f | 939 | char line[1024]; |
7528d467 | 940 | FILE *f; |
2717fa0f | 941 | |
34934506 | 942 | debug2("read_server_config: filename %s", filename); |
2717fa0f | 943 | f = fopen(filename, "r"); |
944 | if (!f) { | |
945 | perror(filename); | |
946 | exit(1); | |
947 | } | |
948 | linenum = 0; | |
949 | while (fgets(line, sizeof(line), f)) { | |
950 | /* Update line number counter. */ | |
951 | linenum++; | |
952 | if (process_server_config_line(options, line, filename, linenum) != 0) | |
953 | bad_options++; | |
8efc0c15 | 954 | } |
5260325f | 955 | fclose(f); |
b7c70970 | 956 | if (bad_options > 0) |
957 | fatal("%s: terminating, %d bad configuration options", | |
958 | filename, bad_options); | |
8efc0c15 | 959 | } |