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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" | |
e6e573bd | 13 | RCSID("$OpenBSD: servconf.c,v 1.99 2002/01/27 14:57:46 stevesk Exp $"); |
42f11eb2 | 14 | |
46d738cd | 15 | #if defined(KRB4) || defined(KRB5) |
42f11eb2 | 16 | #include <krb.h> |
17 | #endif | |
83f46621 | 18 | #ifdef AFS |
19 | #include <kafs.h> | |
20 | #endif | |
8efc0c15 | 21 | |
22 | #include "ssh.h" | |
42f11eb2 | 23 | #include "log.h" |
8efc0c15 | 24 | #include "servconf.h" |
25 | #include "xmalloc.h" | |
a8be9f80 | 26 | #include "compat.h" |
42f11eb2 | 27 | #include "pathnames.h" |
28 | #include "tildexpand.h" | |
29 | #include "misc.h" | |
30 | #include "cipher.h" | |
b2552997 | 31 | #include "kex.h" |
32 | #include "mac.h" | |
42f11eb2 | 33 | |
396c147e | 34 | static void add_listen_addr(ServerOptions *, char *, u_short); |
35 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
48e671d5 | 36 | |
42f11eb2 | 37 | /* AF_UNSPEC or AF_INET or AF_INET6 */ |
38 | extern int IPv4or6; | |
39 | ||
8efc0c15 | 40 | /* Initializes the server options to their default values. */ |
41 | ||
6ae2364d | 42 | void |
5260325f | 43 | initialize_server_options(ServerOptions *options) |
8efc0c15 | 44 | { |
5260325f | 45 | memset(options, 0, sizeof(*options)); |
e15895cd | 46 | |
47 | /* Portable-specific options */ | |
48 | options->pam_authentication_via_kbd_int = -1; | |
49 | ||
50 | /* Standard Options */ | |
48e671d5 | 51 | options->num_ports = 0; |
52 | options->ports_from_cmdline = 0; | |
53 | options->listen_addrs = NULL; | |
fa08c86b | 54 | options->num_host_key_files = 0; |
0fbe8c74 | 55 | options->pid_file = NULL; |
5260325f | 56 | options->server_key_bits = -1; |
57 | options->login_grace_time = -1; | |
58 | options->key_regeneration_time = -1; | |
15853e93 | 59 | options->permit_root_login = PERMIT_NOT_SET; |
5260325f | 60 | options->ignore_rhosts = -1; |
61 | options->ignore_user_known_hosts = -1; | |
62 | options->print_motd = -1; | |
4f4648f9 | 63 | options->print_lastlog = -1; |
5260325f | 64 | options->x11_forwarding = -1; |
65 | options->x11_display_offset = -1; | |
e6e573bd | 66 | options->x11_use_localhost = -1; |
fa649821 | 67 | options->xauth_location = NULL; |
5260325f | 68 | options->strict_modes = -1; |
69 | options->keepalives = -1; | |
70 | options->log_facility = (SyslogFacility) - 1; | |
71 | options->log_level = (LogLevel) - 1; | |
72 | options->rhosts_authentication = -1; | |
73 | options->rhosts_rsa_authentication = -1; | |
8002af61 | 74 | options->hostbased_authentication = -1; |
75 | options->hostbased_uses_name_from_packet_only = -1; | |
5260325f | 76 | options->rsa_authentication = -1; |
fa08c86b | 77 | options->pubkey_authentication = -1; |
ced49be2 | 78 | #if defined(KRB4) || defined(KRB5) |
5260325f | 79 | options->kerberos_authentication = -1; |
80 | options->kerberos_or_local_passwd = -1; | |
81 | options->kerberos_ticket_cleanup = -1; | |
8efc0c15 | 82 | #endif |
ced49be2 | 83 | #if defined(AFS) || defined(KRB5) |
5260325f | 84 | options->kerberos_tgt_passing = -1; |
ced49be2 | 85 | #endif |
86 | #ifdef AFS | |
5260325f | 87 | options->afs_token_passing = -1; |
8efc0c15 | 88 | #endif |
5260325f | 89 | options->password_authentication = -1; |
94ec8c6b | 90 | options->kbd_interactive_authentication = -1; |
5ba55ada | 91 | options->challenge_response_authentication = -1; |
5260325f | 92 | options->permit_empty_passwd = -1; |
93 | options->use_login = -1; | |
33de75a3 | 94 | options->allow_tcp_forwarding = -1; |
5260325f | 95 | options->num_allow_users = 0; |
96 | options->num_deny_users = 0; | |
97 | options->num_allow_groups = 0; | |
98 | options->num_deny_groups = 0; | |
a8be9f80 | 99 | options->ciphers = NULL; |
b2552997 | 100 | options->macs = NULL; |
a8be9f80 | 101 | options->protocol = SSH_PROTO_UNKNOWN; |
1d1ffb87 | 102 | options->gateway_ports = -1; |
38c295d6 | 103 | options->num_subsystems = 0; |
c345cf9d | 104 | options->max_startups_begin = -1; |
105 | options->max_startups_rate = -1; | |
089fbbd2 | 106 | options->max_startups = -1; |
eea39c02 | 107 | options->banner = NULL; |
61e96248 | 108 | options->reverse_mapping_check = -1; |
3ffc6336 | 109 | options->client_alive_interval = -1; |
110 | options->client_alive_count_max = -1; | |
c8445989 | 111 | options->authorized_keys_file = NULL; |
112 | options->authorized_keys_file2 = NULL; | |
8efc0c15 | 113 | } |
114 | ||
6ae2364d | 115 | void |
5260325f | 116 | fill_default_server_options(ServerOptions *options) |
8efc0c15 | 117 | { |
e15895cd | 118 | /* Portable-specific options */ |
119 | if (options->pam_authentication_via_kbd_int == -1) | |
120 | options->pam_authentication_via_kbd_int = 0; | |
121 | ||
122 | /* Standard Options */ | |
fa08c86b | 123 | if (options->protocol == SSH_PROTO_UNKNOWN) |
124 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
125 | if (options->num_host_key_files == 0) { | |
126 | /* fill default hostkeys for protocols */ | |
127 | if (options->protocol & SSH_PROTO_1) | |
0f84fe37 | 128 | options->host_key_files[options->num_host_key_files++] = |
129 | _PATH_HOST_KEY_FILE; | |
130 | if (options->protocol & SSH_PROTO_2) { | |
131 | options->host_key_files[options->num_host_key_files++] = | |
132 | _PATH_HOST_RSA_KEY_FILE; | |
133 | options->host_key_files[options->num_host_key_files++] = | |
134 | _PATH_HOST_DSA_KEY_FILE; | |
135 | } | |
fa08c86b | 136 | } |
48e671d5 | 137 | if (options->num_ports == 0) |
138 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
139 | if (options->listen_addrs == NULL) | |
2d2a2c65 | 140 | add_listen_addr(options, NULL, 0); |
0fbe8c74 | 141 | if (options->pid_file == NULL) |
42f11eb2 | 142 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
5260325f | 143 | if (options->server_key_bits == -1) |
144 | options->server_key_bits = 768; | |
145 | if (options->login_grace_time == -1) | |
146 | options->login_grace_time = 600; | |
147 | if (options->key_regeneration_time == -1) | |
148 | options->key_regeneration_time = 3600; | |
15853e93 | 149 | if (options->permit_root_login == PERMIT_NOT_SET) |
150 | options->permit_root_login = PERMIT_YES; | |
5260325f | 151 | if (options->ignore_rhosts == -1) |
c8d54615 | 152 | options->ignore_rhosts = 1; |
5260325f | 153 | if (options->ignore_user_known_hosts == -1) |
154 | options->ignore_user_known_hosts = 0; | |
5260325f | 155 | if (options->print_motd == -1) |
156 | options->print_motd = 1; | |
4f4648f9 | 157 | if (options->print_lastlog == -1) |
158 | options->print_lastlog = 1; | |
5260325f | 159 | if (options->x11_forwarding == -1) |
c8d54615 | 160 | options->x11_forwarding = 0; |
5260325f | 161 | if (options->x11_display_offset == -1) |
c8d54615 | 162 | options->x11_display_offset = 10; |
e6e573bd | 163 | if (options->x11_use_localhost == -1) |
164 | options->x11_use_localhost = 1; | |
fa649821 | 165 | if (options->xauth_location == NULL) |
fd9ede94 | 166 | options->xauth_location = _PATH_XAUTH; |
5260325f | 167 | if (options->strict_modes == -1) |
168 | options->strict_modes = 1; | |
169 | if (options->keepalives == -1) | |
170 | options->keepalives = 1; | |
171 | if (options->log_facility == (SyslogFacility) (-1)) | |
172 | options->log_facility = SYSLOG_FACILITY_AUTH; | |
173 | if (options->log_level == (LogLevel) (-1)) | |
59c97189 | 174 | options->log_level = SYSLOG_LEVEL_INFO; |
5260325f | 175 | if (options->rhosts_authentication == -1) |
176 | options->rhosts_authentication = 0; | |
177 | if (options->rhosts_rsa_authentication == -1) | |
c8d54615 | 178 | options->rhosts_rsa_authentication = 0; |
8002af61 | 179 | if (options->hostbased_authentication == -1) |
180 | options->hostbased_authentication = 0; | |
181 | if (options->hostbased_uses_name_from_packet_only == -1) | |
182 | options->hostbased_uses_name_from_packet_only = 0; | |
5260325f | 183 | if (options->rsa_authentication == -1) |
184 | options->rsa_authentication = 1; | |
fa08c86b | 185 | if (options->pubkey_authentication == -1) |
186 | options->pubkey_authentication = 1; | |
ced49be2 | 187 | #if defined(KRB4) || defined(KRB5) |
5260325f | 188 | if (options->kerberos_authentication == -1) |
189 | options->kerberos_authentication = (access(KEYFILE, R_OK) == 0); | |
190 | if (options->kerberos_or_local_passwd == -1) | |
191 | options->kerberos_or_local_passwd = 1; | |
192 | if (options->kerberos_ticket_cleanup == -1) | |
193 | options->kerberos_ticket_cleanup = 1; | |
ced49be2 | 194 | #endif |
195 | #if defined(AFS) || defined(KRB5) | |
5260325f | 196 | if (options->kerberos_tgt_passing == -1) |
197 | options->kerberos_tgt_passing = 0; | |
ced49be2 | 198 | #endif |
184eed6a | 199 | #ifdef AFS |
5260325f | 200 | if (options->afs_token_passing == -1) |
201 | options->afs_token_passing = k_hasafs(); | |
ced49be2 | 202 | #endif |
5260325f | 203 | if (options->password_authentication == -1) |
204 | options->password_authentication = 1; | |
94ec8c6b | 205 | if (options->kbd_interactive_authentication == -1) |
206 | options->kbd_interactive_authentication = 0; | |
5ba55ada | 207 | if (options->challenge_response_authentication == -1) |
208 | options->challenge_response_authentication = 1; | |
5260325f | 209 | if (options->permit_empty_passwd == -1) |
c8d54615 | 210 | options->permit_empty_passwd = 0; |
5260325f | 211 | if (options->use_login == -1) |
212 | options->use_login = 0; | |
33de75a3 | 213 | if (options->allow_tcp_forwarding == -1) |
214 | options->allow_tcp_forwarding = 1; | |
1d1ffb87 | 215 | if (options->gateway_ports == -1) |
216 | options->gateway_ports = 0; | |
089fbbd2 | 217 | if (options->max_startups == -1) |
218 | options->max_startups = 10; | |
c345cf9d | 219 | if (options->max_startups_rate == -1) |
220 | options->max_startups_rate = 100; /* 100% */ | |
221 | if (options->max_startups_begin == -1) | |
222 | options->max_startups_begin = options->max_startups; | |
61e96248 | 223 | if (options->reverse_mapping_check == -1) |
224 | options->reverse_mapping_check = 0; | |
3ffc6336 | 225 | if (options->client_alive_interval == -1) |
184eed6a | 226 | options->client_alive_interval = 0; |
3ffc6336 | 227 | if (options->client_alive_count_max == -1) |
228 | options->client_alive_count_max = 3; | |
5df83e07 | 229 | if (options->authorized_keys_file2 == NULL) { |
230 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
231 | if (options->authorized_keys_file != NULL) | |
232 | options->authorized_keys_file2 = options->authorized_keys_file; | |
233 | else | |
234 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
235 | } | |
236 | if (options->authorized_keys_file == NULL) | |
237 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
8efc0c15 | 238 | } |
239 | ||
8efc0c15 | 240 | /* Keyword tokens. */ |
5260325f | 241 | typedef enum { |
242 | sBadOption, /* == unknown option */ | |
e15895cd | 243 | /* Portable-specific options */ |
244 | sPAMAuthenticationViaKbdInt, | |
245 | /* Standard Options */ | |
5260325f | 246 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, |
247 | sPermitRootLogin, sLogFacility, sLogLevel, | |
248 | sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, | |
ced49be2 | 249 | #if defined(KRB4) || defined(KRB5) |
5260325f | 250 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
8efc0c15 | 251 | #endif |
ced49be2 | 252 | #if defined(AFS) || defined(KRB5) |
253 | sKerberosTgtPassing, | |
254 | #endif | |
8efc0c15 | 255 | #ifdef AFS |
ced49be2 | 256 | sAFSTokenPassing, |
8efc0c15 | 257 | #endif |
d464095c | 258 | sChallengeResponseAuthentication, |
94ec8c6b | 259 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, |
4f4648f9 | 260 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e6e573bd | 261 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
5c53a31e | 262 | sStrictModes, sEmptyPasswd, sKeepAlives, |
33de75a3 | 263 | sUseLogin, sAllowTcpForwarding, |
264 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, | |
b2552997 | 265 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
fa08c86b | 266 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, |
8002af61 | 267 | sBanner, sReverseMappingCheck, sHostbasedAuthentication, |
184eed6a | 268 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
c8445989 | 269 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
2717fa0f | 270 | sDeprecated |
8efc0c15 | 271 | } ServerOpCodes; |
272 | ||
273 | /* Textual representation of the tokens. */ | |
5260325f | 274 | static struct { |
275 | const char *name; | |
276 | ServerOpCodes opcode; | |
277 | } keywords[] = { | |
e15895cd | 278 | /* Portable-specific options */ |
279 | { "PAMAuthenticationViaKbdInt", sPAMAuthenticationViaKbdInt }, | |
280 | /* Standard Options */ | |
5260325f | 281 | { "port", sPort }, |
282 | { "hostkey", sHostKeyFile }, | |
fa08c86b | 283 | { "hostdsakey", sHostKeyFile }, /* alias */ |
2b87da3b | 284 | { "pidfile", sPidFile }, |
5260325f | 285 | { "serverkeybits", sServerKeyBits }, |
286 | { "logingracetime", sLoginGraceTime }, | |
287 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
288 | { "permitrootlogin", sPermitRootLogin }, | |
289 | { "syslogfacility", sLogFacility }, | |
290 | { "loglevel", sLogLevel }, | |
291 | { "rhostsauthentication", sRhostsAuthentication }, | |
292 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, | |
8002af61 | 293 | { "hostbasedauthentication", sHostbasedAuthentication }, |
294 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, | |
5260325f | 295 | { "rsaauthentication", sRSAAuthentication }, |
fa08c86b | 296 | { "pubkeyauthentication", sPubkeyAuthentication }, |
297 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
ced49be2 | 298 | #if defined(KRB4) || defined(KRB5) |
5260325f | 299 | { "kerberosauthentication", sKerberosAuthentication }, |
300 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
301 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
8efc0c15 | 302 | #endif |
ced49be2 | 303 | #if defined(AFS) || defined(KRB5) |
5260325f | 304 | { "kerberostgtpassing", sKerberosTgtPassing }, |
ced49be2 | 305 | #endif |
306 | #ifdef AFS | |
5260325f | 307 | { "afstokenpassing", sAFSTokenPassing }, |
8efc0c15 | 308 | #endif |
5260325f | 309 | { "passwordauthentication", sPasswordAuthentication }, |
94ec8c6b | 310 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, |
d464095c | 311 | { "challengeresponseauthentication", sChallengeResponseAuthentication }, |
312 | { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ | |
5c53a31e | 313 | { "checkmail", sDeprecated }, |
5260325f | 314 | { "listenaddress", sListenAddress }, |
315 | { "printmotd", sPrintMotd }, | |
4f4648f9 | 316 | { "printlastlog", sPrintLastLog }, |
5260325f | 317 | { "ignorerhosts", sIgnoreRhosts }, |
318 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
319 | { "x11forwarding", sX11Forwarding }, | |
320 | { "x11displayoffset", sX11DisplayOffset }, | |
e6e573bd | 321 | { "x11uselocalhost", sX11UseLocalhost }, |
fa649821 | 322 | { "xauthlocation", sXAuthLocation }, |
5260325f | 323 | { "strictmodes", sStrictModes }, |
324 | { "permitemptypasswords", sEmptyPasswd }, | |
325 | { "uselogin", sUseLogin }, | |
5260325f | 326 | { "keepalive", sKeepAlives }, |
33de75a3 | 327 | { "allowtcpforwarding", sAllowTcpForwarding }, |
5260325f | 328 | { "allowusers", sAllowUsers }, |
329 | { "denyusers", sDenyUsers }, | |
330 | { "allowgroups", sAllowGroups }, | |
331 | { "denygroups", sDenyGroups }, | |
a8be9f80 | 332 | { "ciphers", sCiphers }, |
b2552997 | 333 | { "macs", sMacs }, |
a8be9f80 | 334 | { "protocol", sProtocol }, |
1d1ffb87 | 335 | { "gatewayports", sGatewayPorts }, |
38c295d6 | 336 | { "subsystem", sSubsystem }, |
089fbbd2 | 337 | { "maxstartups", sMaxStartups }, |
eea39c02 | 338 | { "banner", sBanner }, |
61e96248 | 339 | { "reversemappingcheck", sReverseMappingCheck }, |
3ffc6336 | 340 | { "clientaliveinterval", sClientAliveInterval }, |
341 | { "clientalivecountmax", sClientAliveCountMax }, | |
c8445989 | 342 | { "authorizedkeysfile", sAuthorizedKeysFile }, |
343 | { "authorizedkeysfile2", sAuthorizedKeysFile2 }, | |
17a3011c | 344 | { NULL, sBadOption } |
8efc0c15 | 345 | }; |
346 | ||
aa3378df | 347 | /* |
6be9a5e8 | 348 | * Returns the number of the token pointed to by cp or sBadOption. |
aa3378df | 349 | */ |
8efc0c15 | 350 | |
6ae2364d | 351 | static ServerOpCodes |
5260325f | 352 | parse_token(const char *cp, const char *filename, |
353 | int linenum) | |
8efc0c15 | 354 | { |
1e3b8b07 | 355 | u_int i; |
8efc0c15 | 356 | |
5260325f | 357 | for (i = 0; keywords[i].name; i++) |
aa3378df | 358 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 359 | return keywords[i].opcode; |
8efc0c15 | 360 | |
b7c70970 | 361 | error("%s: line %d: Bad configuration option: %s", |
362 | filename, linenum, cp); | |
5260325f | 363 | return sBadOption; |
8efc0c15 | 364 | } |
365 | ||
396c147e | 366 | static void |
2d2a2c65 | 367 | add_listen_addr(ServerOptions *options, char *addr, u_short port) |
48e671d5 | 368 | { |
48e671d5 | 369 | int i; |
370 | ||
371 | if (options->num_ports == 0) | |
372 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
2d2a2c65 | 373 | if (port == 0) |
d11c1288 | 374 | for (i = 0; i < options->num_ports; i++) |
375 | add_one_listen_addr(options, addr, options->ports[i]); | |
376 | else | |
2d2a2c65 | 377 | add_one_listen_addr(options, addr, port); |
d11c1288 | 378 | } |
379 | ||
396c147e | 380 | static void |
d11c1288 | 381 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) |
382 | { | |
383 | struct addrinfo hints, *ai, *aitop; | |
384 | char strport[NI_MAXSERV]; | |
385 | int gaierr; | |
386 | ||
387 | memset(&hints, 0, sizeof(hints)); | |
388 | hints.ai_family = IPv4or6; | |
389 | hints.ai_socktype = SOCK_STREAM; | |
390 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
391 | snprintf(strport, sizeof strport, "%d", port); | |
392 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) | |
393 | fatal("bad addr or host: %s (%s)", | |
394 | addr ? addr : "<NULL>", | |
395 | gai_strerror(gaierr)); | |
396 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
397 | ; | |
398 | ai->ai_next = options->listen_addrs; | |
399 | options->listen_addrs = aitop; | |
48e671d5 | 400 | } |
401 | ||
2717fa0f | 402 | int |
403 | process_server_config_line(ServerOptions *options, char *line, | |
404 | const char *filename, int linenum) | |
8efc0c15 | 405 | { |
d11c1288 | 406 | char *cp, **charptr, *arg, *p; |
2717fa0f | 407 | int *intptr, value; |
5260325f | 408 | ServerOpCodes opcode; |
97de229c | 409 | int i, n; |
5260325f | 410 | |
2717fa0f | 411 | cp = line; |
412 | arg = strdelim(&cp); | |
413 | /* Ignore leading whitespace */ | |
414 | if (*arg == '\0') | |
704b1659 | 415 | arg = strdelim(&cp); |
2717fa0f | 416 | if (!arg || !*arg || *arg == '#') |
417 | return 0; | |
418 | intptr = NULL; | |
419 | charptr = NULL; | |
420 | opcode = parse_token(arg, filename, linenum); | |
421 | switch (opcode) { | |
422 | /* Portable-specific options */ | |
423 | case sPAMAuthenticationViaKbdInt: | |
424 | intptr = &options->pam_authentication_via_kbd_int; | |
425 | goto parse_flag; | |
48e671d5 | 426 | |
2717fa0f | 427 | /* Standard Options */ |
428 | case sBadOption: | |
429 | return -1; | |
430 | case sPort: | |
431 | /* ignore ports from configfile if cmdline specifies ports */ | |
432 | if (options->ports_from_cmdline) | |
433 | return 0; | |
434 | if (options->listen_addrs != NULL) | |
435 | fatal("%s line %d: ports must be specified before " | |
3a454b6a | 436 | "ListenAddress.", filename, linenum); |
2717fa0f | 437 | if (options->num_ports >= MAX_PORTS) |
438 | fatal("%s line %d: too many ports.", | |
439 | filename, linenum); | |
440 | arg = strdelim(&cp); | |
441 | if (!arg || *arg == '\0') | |
442 | fatal("%s line %d: missing port number.", | |
443 | filename, linenum); | |
444 | options->ports[options->num_ports++] = a2port(arg); | |
445 | if (options->ports[options->num_ports-1] == 0) | |
446 | fatal("%s line %d: Badly formatted port number.", | |
447 | filename, linenum); | |
448 | break; | |
449 | ||
450 | case sServerKeyBits: | |
451 | intptr = &options->server_key_bits; | |
5260325f | 452 | parse_int: |
2717fa0f | 453 | arg = strdelim(&cp); |
454 | if (!arg || *arg == '\0') | |
455 | fatal("%s line %d: missing integer value.", | |
456 | filename, linenum); | |
457 | value = atoi(arg); | |
458 | if (*intptr == -1) | |
459 | *intptr = value; | |
460 | break; | |
461 | ||
462 | case sLoginGraceTime: | |
463 | intptr = &options->login_grace_time; | |
e2b1fb42 | 464 | parse_time: |
2717fa0f | 465 | arg = strdelim(&cp); |
466 | if (!arg || *arg == '\0') | |
467 | fatal("%s line %d: missing time value.", | |
468 | filename, linenum); | |
469 | if ((value = convtime(arg)) == -1) | |
470 | fatal("%s line %d: invalid time value.", | |
471 | filename, linenum); | |
472 | if (*intptr == -1) | |
473 | *intptr = value; | |
474 | break; | |
475 | ||
476 | case sKeyRegenerationTime: | |
477 | intptr = &options->key_regeneration_time; | |
478 | goto parse_time; | |
479 | ||
480 | case sListenAddress: | |
481 | arg = strdelim(&cp); | |
482 | if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0) | |
483 | fatal("%s line %d: missing inet addr.", | |
484 | filename, linenum); | |
485 | if (*arg == '[') { | |
486 | if ((p = strchr(arg, ']')) == NULL) | |
487 | fatal("%s line %d: bad ipv6 inet addr usage.", | |
e2b1fb42 | 488 | filename, linenum); |
2717fa0f | 489 | arg++; |
490 | memmove(p, p+1, strlen(p+1)+1); | |
491 | } else if (((p = strchr(arg, ':')) == NULL) || | |
492 | (strchr(p+1, ':') != NULL)) { | |
493 | add_listen_addr(options, arg, 0); | |
e2b1fb42 | 494 | break; |
2717fa0f | 495 | } |
496 | if (*p == ':') { | |
497 | u_short port; | |
5260325f | 498 | |
2717fa0f | 499 | p++; |
500 | if (*p == '\0') | |
501 | fatal("%s line %d: bad inet addr:port usage.", | |
48e671d5 | 502 | filename, linenum); |
2717fa0f | 503 | else { |
504 | *(p-1) = '\0'; | |
505 | if ((port = a2port(p)) == 0) | |
506 | fatal("%s line %d: bad port number.", | |
d11c1288 | 507 | filename, linenum); |
2717fa0f | 508 | add_listen_addr(options, arg, port); |
d11c1288 | 509 | } |
2717fa0f | 510 | } else if (*p == '\0') |
511 | add_listen_addr(options, arg, 0); | |
512 | else | |
513 | fatal("%s line %d: bad inet addr usage.", | |
514 | filename, linenum); | |
515 | break; | |
516 | ||
517 | case sHostKeyFile: | |
518 | intptr = &options->num_host_key_files; | |
519 | if (*intptr >= MAX_HOSTKEYS) | |
520 | fatal("%s line %d: too many host keys specified (max %d).", | |
521 | filename, linenum, MAX_HOSTKEYS); | |
522 | charptr = &options->host_key_files[*intptr]; | |
fa649821 | 523 | parse_filename: |
2717fa0f | 524 | arg = strdelim(&cp); |
525 | if (!arg || *arg == '\0') | |
526 | fatal("%s line %d: missing file name.", | |
527 | filename, linenum); | |
528 | if (*charptr == NULL) { | |
529 | *charptr = tilde_expand_filename(arg, getuid()); | |
530 | /* increase optional counter */ | |
531 | if (intptr != NULL) | |
532 | *intptr = *intptr + 1; | |
533 | } | |
534 | break; | |
0fbe8c74 | 535 | |
2717fa0f | 536 | case sPidFile: |
537 | charptr = &options->pid_file; | |
538 | goto parse_filename; | |
5260325f | 539 | |
2717fa0f | 540 | case sPermitRootLogin: |
541 | intptr = &options->permit_root_login; | |
542 | arg = strdelim(&cp); | |
543 | if (!arg || *arg == '\0') | |
544 | fatal("%s line %d: missing yes/" | |
545 | "without-password/forced-commands-only/no " | |
546 | "argument.", filename, linenum); | |
547 | value = 0; /* silence compiler */ | |
548 | if (strcmp(arg, "without-password") == 0) | |
549 | value = PERMIT_NO_PASSWD; | |
550 | else if (strcmp(arg, "forced-commands-only") == 0) | |
551 | value = PERMIT_FORCED_ONLY; | |
552 | else if (strcmp(arg, "yes") == 0) | |
553 | value = PERMIT_YES; | |
554 | else if (strcmp(arg, "no") == 0) | |
555 | value = PERMIT_NO; | |
556 | else | |
557 | fatal("%s line %d: Bad yes/" | |
558 | "without-password/forced-commands-only/no " | |
559 | "argument: %s", filename, linenum, arg); | |
560 | if (*intptr == -1) | |
561 | *intptr = value; | |
562 | break; | |
563 | ||
564 | case sIgnoreRhosts: | |
565 | intptr = &options->ignore_rhosts; | |
5260325f | 566 | parse_flag: |
2717fa0f | 567 | arg = strdelim(&cp); |
568 | if (!arg || *arg == '\0') | |
569 | fatal("%s line %d: missing yes/no argument.", | |
570 | filename, linenum); | |
571 | value = 0; /* silence compiler */ | |
572 | if (strcmp(arg, "yes") == 0) | |
573 | value = 1; | |
574 | else if (strcmp(arg, "no") == 0) | |
575 | value = 0; | |
576 | else | |
577 | fatal("%s line %d: Bad yes/no argument: %s", | |
578 | filename, linenum, arg); | |
579 | if (*intptr == -1) | |
580 | *intptr = value; | |
581 | break; | |
582 | ||
583 | case sIgnoreUserKnownHosts: | |
584 | intptr = &options->ignore_user_known_hosts; | |
585 | goto parse_flag; | |
586 | ||
587 | case sRhostsAuthentication: | |
588 | intptr = &options->rhosts_authentication; | |
589 | goto parse_flag; | |
590 | ||
591 | case sRhostsRSAAuthentication: | |
592 | intptr = &options->rhosts_rsa_authentication; | |
593 | goto parse_flag; | |
594 | ||
595 | case sHostbasedAuthentication: | |
596 | intptr = &options->hostbased_authentication; | |
597 | goto parse_flag; | |
598 | ||
599 | case sHostbasedUsesNameFromPacketOnly: | |
600 | intptr = &options->hostbased_uses_name_from_packet_only; | |
601 | goto parse_flag; | |
602 | ||
603 | case sRSAAuthentication: | |
604 | intptr = &options->rsa_authentication; | |
605 | goto parse_flag; | |
606 | ||
607 | case sPubkeyAuthentication: | |
608 | intptr = &options->pubkey_authentication; | |
609 | goto parse_flag; | |
610 | #if defined(KRB4) || defined(KRB5) | |
611 | case sKerberosAuthentication: | |
612 | intptr = &options->kerberos_authentication; | |
613 | goto parse_flag; | |
5260325f | 614 | |
2717fa0f | 615 | case sKerberosOrLocalPasswd: |
616 | intptr = &options->kerberos_or_local_passwd; | |
617 | goto parse_flag; | |
5260325f | 618 | |
2717fa0f | 619 | case sKerberosTicketCleanup: |
620 | intptr = &options->kerberos_ticket_cleanup; | |
621 | goto parse_flag; | |
622 | #endif | |
623 | #if defined(AFS) || defined(KRB5) | |
624 | case sKerberosTgtPassing: | |
625 | intptr = &options->kerberos_tgt_passing; | |
626 | goto parse_flag; | |
627 | #endif | |
628 | #ifdef AFS | |
629 | case sAFSTokenPassing: | |
630 | intptr = &options->afs_token_passing; | |
631 | goto parse_flag; | |
632 | #endif | |
5260325f | 633 | |
2717fa0f | 634 | case sPasswordAuthentication: |
635 | intptr = &options->password_authentication; | |
636 | goto parse_flag; | |
5260325f | 637 | |
2717fa0f | 638 | case sKbdInteractiveAuthentication: |
639 | intptr = &options->kbd_interactive_authentication; | |
640 | goto parse_flag; | |
8002af61 | 641 | |
2717fa0f | 642 | case sChallengeResponseAuthentication: |
643 | intptr = &options->challenge_response_authentication; | |
644 | goto parse_flag; | |
8002af61 | 645 | |
2717fa0f | 646 | case sPrintMotd: |
647 | intptr = &options->print_motd; | |
648 | goto parse_flag; | |
5260325f | 649 | |
2717fa0f | 650 | case sPrintLastLog: |
651 | intptr = &options->print_lastlog; | |
652 | goto parse_flag; | |
5260325f | 653 | |
2717fa0f | 654 | case sX11Forwarding: |
655 | intptr = &options->x11_forwarding; | |
656 | goto parse_flag; | |
5260325f | 657 | |
2717fa0f | 658 | case sX11DisplayOffset: |
659 | intptr = &options->x11_display_offset; | |
660 | goto parse_int; | |
8efc0c15 | 661 | |
e6e573bd | 662 | case sX11UseLocalhost: |
663 | intptr = &options->x11_use_localhost; | |
664 | goto parse_flag; | |
665 | ||
2717fa0f | 666 | case sXAuthLocation: |
667 | charptr = &options->xauth_location; | |
668 | goto parse_filename; | |
5260325f | 669 | |
2717fa0f | 670 | case sStrictModes: |
671 | intptr = &options->strict_modes; | |
672 | goto parse_flag; | |
5260325f | 673 | |
2717fa0f | 674 | case sKeepAlives: |
675 | intptr = &options->keepalives; | |
676 | goto parse_flag; | |
33de75a3 | 677 | |
2717fa0f | 678 | case sEmptyPasswd: |
679 | intptr = &options->permit_empty_passwd; | |
680 | goto parse_flag; | |
5260325f | 681 | |
2717fa0f | 682 | case sUseLogin: |
683 | intptr = &options->use_login; | |
684 | goto parse_flag; | |
5260325f | 685 | |
2717fa0f | 686 | case sGatewayPorts: |
687 | intptr = &options->gateway_ports; | |
688 | goto parse_flag; | |
5260325f | 689 | |
2717fa0f | 690 | case sReverseMappingCheck: |
691 | intptr = &options->reverse_mapping_check; | |
692 | goto parse_flag; | |
5260325f | 693 | |
2717fa0f | 694 | case sLogFacility: |
695 | intptr = (int *) &options->log_facility; | |
696 | arg = strdelim(&cp); | |
697 | value = log_facility_number(arg); | |
698 | if (value == (SyslogFacility) - 1) | |
699 | fatal("%.200s line %d: unsupported log facility '%s'", | |
700 | filename, linenum, arg ? arg : "<NONE>"); | |
701 | if (*intptr == -1) | |
702 | *intptr = (SyslogFacility) value; | |
703 | break; | |
704 | ||
705 | case sLogLevel: | |
706 | intptr = (int *) &options->log_level; | |
707 | arg = strdelim(&cp); | |
708 | value = log_level_number(arg); | |
709 | if (value == (LogLevel) - 1) | |
710 | fatal("%.200s line %d: unsupported log level '%s'", | |
711 | filename, linenum, arg ? arg : "<NONE>"); | |
712 | if (*intptr == -1) | |
713 | *intptr = (LogLevel) value; | |
714 | break; | |
715 | ||
716 | case sAllowTcpForwarding: | |
717 | intptr = &options->allow_tcp_forwarding; | |
718 | goto parse_flag; | |
719 | ||
720 | case sAllowUsers: | |
721 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
722 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
723 | fatal("%s line %d: too many allow users.", | |
724 | filename, linenum); | |
725 | options->allow_users[options->num_allow_users++] = xstrdup(arg); | |
726 | } | |
727 | break; | |
a8be9f80 | 728 | |
2717fa0f | 729 | case sDenyUsers: |
730 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
731 | if (options->num_deny_users >= MAX_DENY_USERS) | |
732 | fatal( "%s line %d: too many deny users.", | |
733 | filename, linenum); | |
734 | options->deny_users[options->num_deny_users++] = xstrdup(arg); | |
735 | } | |
736 | break; | |
b2552997 | 737 | |
2717fa0f | 738 | case sAllowGroups: |
739 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
740 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
741 | fatal("%s line %d: too many allow groups.", | |
742 | filename, linenum); | |
743 | options->allow_groups[options->num_allow_groups++] = xstrdup(arg); | |
744 | } | |
745 | break; | |
a8be9f80 | 746 | |
2717fa0f | 747 | case sDenyGroups: |
748 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
749 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
750 | fatal("%s line %d: too many deny groups.", | |
751 | filename, linenum); | |
752 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
753 | } | |
754 | break; | |
38c295d6 | 755 | |
2717fa0f | 756 | case sCiphers: |
757 | arg = strdelim(&cp); | |
758 | if (!arg || *arg == '\0') | |
759 | fatal("%s line %d: Missing argument.", filename, linenum); | |
760 | if (!ciphers_valid(arg)) | |
761 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
762 | filename, linenum, arg ? arg : "<NONE>"); | |
763 | if (options->ciphers == NULL) | |
764 | options->ciphers = xstrdup(arg); | |
765 | break; | |
766 | ||
767 | case sMacs: | |
768 | arg = strdelim(&cp); | |
769 | if (!arg || *arg == '\0') | |
770 | fatal("%s line %d: Missing argument.", filename, linenum); | |
771 | if (!mac_valid(arg)) | |
772 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
773 | filename, linenum, arg ? arg : "<NONE>"); | |
774 | if (options->macs == NULL) | |
775 | options->macs = xstrdup(arg); | |
776 | break; | |
777 | ||
778 | case sProtocol: | |
779 | intptr = &options->protocol; | |
780 | arg = strdelim(&cp); | |
781 | if (!arg || *arg == '\0') | |
782 | fatal("%s line %d: Missing argument.", filename, linenum); | |
783 | value = proto_spec(arg); | |
784 | if (value == SSH_PROTO_UNKNOWN) | |
785 | fatal("%s line %d: Bad protocol spec '%s'.", | |
184eed6a | 786 | filename, linenum, arg ? arg : "<NONE>"); |
2717fa0f | 787 | if (*intptr == SSH_PROTO_UNKNOWN) |
788 | *intptr = value; | |
789 | break; | |
790 | ||
791 | case sSubsystem: | |
792 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
793 | fatal("%s line %d: too many subsystems defined.", | |
184eed6a | 794 | filename, linenum); |
2717fa0f | 795 | } |
796 | arg = strdelim(&cp); | |
797 | if (!arg || *arg == '\0') | |
798 | fatal("%s line %d: Missing subsystem name.", | |
184eed6a | 799 | filename, linenum); |
2717fa0f | 800 | for (i = 0; i < options->num_subsystems; i++) |
801 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
802 | fatal("%s line %d: Subsystem '%s' already defined.", | |
184eed6a | 803 | filename, linenum, arg); |
2717fa0f | 804 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); |
805 | arg = strdelim(&cp); | |
806 | if (!arg || *arg == '\0') | |
807 | fatal("%s line %d: Missing subsystem command.", | |
184eed6a | 808 | filename, linenum); |
2717fa0f | 809 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); |
810 | options->num_subsystems++; | |
811 | break; | |
812 | ||
813 | case sMaxStartups: | |
814 | arg = strdelim(&cp); | |
815 | if (!arg || *arg == '\0') | |
816 | fatal("%s line %d: Missing MaxStartups spec.", | |
184eed6a | 817 | filename, linenum); |
2717fa0f | 818 | if ((n = sscanf(arg, "%d:%d:%d", |
819 | &options->max_startups_begin, | |
820 | &options->max_startups_rate, | |
821 | &options->max_startups)) == 3) { | |
822 | if (options->max_startups_begin > | |
823 | options->max_startups || | |
824 | options->max_startups_rate > 100 || | |
825 | options->max_startups_rate < 1) | |
c345cf9d | 826 | fatal("%s line %d: Illegal MaxStartups spec.", |
97de229c | 827 | filename, linenum); |
2717fa0f | 828 | } else if (n != 1) |
829 | fatal("%s line %d: Illegal MaxStartups spec.", | |
830 | filename, linenum); | |
831 | else | |
832 | options->max_startups = options->max_startups_begin; | |
833 | break; | |
834 | ||
835 | case sBanner: | |
836 | charptr = &options->banner; | |
837 | goto parse_filename; | |
838 | /* | |
839 | * These options can contain %X options expanded at | |
840 | * connect time, so that you can specify paths like: | |
841 | * | |
842 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
843 | */ | |
844 | case sAuthorizedKeysFile: | |
845 | case sAuthorizedKeysFile2: | |
846 | charptr = (opcode == sAuthorizedKeysFile ) ? | |
847 | &options->authorized_keys_file : | |
848 | &options->authorized_keys_file2; | |
849 | goto parse_filename; | |
850 | ||
851 | case sClientAliveInterval: | |
852 | intptr = &options->client_alive_interval; | |
853 | goto parse_time; | |
854 | ||
855 | case sClientAliveCountMax: | |
856 | intptr = &options->client_alive_count_max; | |
857 | goto parse_int; | |
858 | ||
859 | case sDeprecated: | |
860 | log("%s line %d: Deprecated option %s", | |
861 | filename, linenum, arg); | |
862 | while (arg) | |
863 | arg = strdelim(&cp); | |
864 | break; | |
865 | ||
866 | default: | |
867 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
868 | filename, linenum, arg, opcode); | |
869 | } | |
870 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
871 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
872 | filename, linenum, arg); | |
873 | return 0; | |
874 | } | |
089fbbd2 | 875 | |
2717fa0f | 876 | /* Reads the server configuration file. */ |
5c53a31e | 877 | |
2717fa0f | 878 | void |
879 | read_server_config(ServerOptions *options, const char *filename) | |
880 | { | |
881 | FILE *f; | |
882 | char line[1024]; | |
883 | int linenum; | |
884 | int bad_options = 0; | |
885 | ||
886 | f = fopen(filename, "r"); | |
887 | if (!f) { | |
888 | perror(filename); | |
889 | exit(1); | |
890 | } | |
891 | linenum = 0; | |
892 | while (fgets(line, sizeof(line), f)) { | |
893 | /* Update line number counter. */ | |
894 | linenum++; | |
895 | if (process_server_config_line(options, line, filename, linenum) != 0) | |
896 | bad_options++; | |
8efc0c15 | 897 | } |
5260325f | 898 | fclose(f); |
b7c70970 | 899 | if (bad_options > 0) |
900 | fatal("%s: terminating, %d bad configuration options", | |
901 | filename, bad_options); | |
8efc0c15 | 902 | } |