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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" | |
2717fa0f | 13 | RCSID("$OpenBSD: servconf.c,v 1.94 2001/12/06 13:30:05 markus 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; | |
fa649821 | 66 | options->xauth_location = NULL; |
5260325f | 67 | options->strict_modes = -1; |
68 | options->keepalives = -1; | |
69 | options->log_facility = (SyslogFacility) - 1; | |
70 | options->log_level = (LogLevel) - 1; | |
71 | options->rhosts_authentication = -1; | |
72 | options->rhosts_rsa_authentication = -1; | |
8002af61 | 73 | options->hostbased_authentication = -1; |
74 | options->hostbased_uses_name_from_packet_only = -1; | |
5260325f | 75 | options->rsa_authentication = -1; |
fa08c86b | 76 | options->pubkey_authentication = -1; |
ced49be2 | 77 | #if defined(KRB4) || defined(KRB5) |
5260325f | 78 | options->kerberos_authentication = -1; |
79 | options->kerberos_or_local_passwd = -1; | |
80 | options->kerberos_ticket_cleanup = -1; | |
8efc0c15 | 81 | #endif |
ced49be2 | 82 | #if defined(AFS) || defined(KRB5) |
5260325f | 83 | options->kerberos_tgt_passing = -1; |
ced49be2 | 84 | #endif |
85 | #ifdef AFS | |
5260325f | 86 | options->afs_token_passing = -1; |
8efc0c15 | 87 | #endif |
5260325f | 88 | options->password_authentication = -1; |
94ec8c6b | 89 | options->kbd_interactive_authentication = -1; |
5ba55ada | 90 | options->challenge_response_authentication = -1; |
5260325f | 91 | options->permit_empty_passwd = -1; |
92 | options->use_login = -1; | |
33de75a3 | 93 | options->allow_tcp_forwarding = -1; |
5260325f | 94 | options->num_allow_users = 0; |
95 | options->num_deny_users = 0; | |
96 | options->num_allow_groups = 0; | |
97 | options->num_deny_groups = 0; | |
a8be9f80 | 98 | options->ciphers = NULL; |
b2552997 | 99 | options->macs = NULL; |
a8be9f80 | 100 | options->protocol = SSH_PROTO_UNKNOWN; |
1d1ffb87 | 101 | options->gateway_ports = -1; |
38c295d6 | 102 | options->num_subsystems = 0; |
c345cf9d | 103 | options->max_startups_begin = -1; |
104 | options->max_startups_rate = -1; | |
089fbbd2 | 105 | options->max_startups = -1; |
eea39c02 | 106 | options->banner = NULL; |
61e96248 | 107 | options->reverse_mapping_check = -1; |
3ffc6336 | 108 | options->client_alive_interval = -1; |
109 | options->client_alive_count_max = -1; | |
c8445989 | 110 | options->authorized_keys_file = NULL; |
111 | options->authorized_keys_file2 = NULL; | |
8efc0c15 | 112 | } |
113 | ||
6ae2364d | 114 | void |
5260325f | 115 | fill_default_server_options(ServerOptions *options) |
8efc0c15 | 116 | { |
e15895cd | 117 | /* Portable-specific options */ |
118 | if (options->pam_authentication_via_kbd_int == -1) | |
119 | options->pam_authentication_via_kbd_int = 0; | |
120 | ||
121 | /* Standard Options */ | |
fa08c86b | 122 | if (options->protocol == SSH_PROTO_UNKNOWN) |
123 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
124 | if (options->num_host_key_files == 0) { | |
125 | /* fill default hostkeys for protocols */ | |
126 | if (options->protocol & SSH_PROTO_1) | |
42f11eb2 | 127 | options->host_key_files[options->num_host_key_files++] = _PATH_HOST_KEY_FILE; |
fa08c86b | 128 | if (options->protocol & SSH_PROTO_2) |
42f11eb2 | 129 | options->host_key_files[options->num_host_key_files++] = _PATH_HOST_DSA_KEY_FILE; |
fa08c86b | 130 | } |
48e671d5 | 131 | if (options->num_ports == 0) |
132 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
133 | if (options->listen_addrs == NULL) | |
2d2a2c65 | 134 | add_listen_addr(options, NULL, 0); |
0fbe8c74 | 135 | if (options->pid_file == NULL) |
42f11eb2 | 136 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
5260325f | 137 | if (options->server_key_bits == -1) |
138 | options->server_key_bits = 768; | |
139 | if (options->login_grace_time == -1) | |
140 | options->login_grace_time = 600; | |
141 | if (options->key_regeneration_time == -1) | |
142 | options->key_regeneration_time = 3600; | |
15853e93 | 143 | if (options->permit_root_login == PERMIT_NOT_SET) |
144 | options->permit_root_login = PERMIT_YES; | |
5260325f | 145 | if (options->ignore_rhosts == -1) |
c8d54615 | 146 | options->ignore_rhosts = 1; |
5260325f | 147 | if (options->ignore_user_known_hosts == -1) |
148 | options->ignore_user_known_hosts = 0; | |
5260325f | 149 | if (options->print_motd == -1) |
150 | options->print_motd = 1; | |
4f4648f9 | 151 | if (options->print_lastlog == -1) |
152 | options->print_lastlog = 1; | |
5260325f | 153 | if (options->x11_forwarding == -1) |
c8d54615 | 154 | options->x11_forwarding = 0; |
5260325f | 155 | if (options->x11_display_offset == -1) |
c8d54615 | 156 | options->x11_display_offset = 10; |
fd9ede94 | 157 | #ifdef _PATH_XAUTH |
fa649821 | 158 | if (options->xauth_location == NULL) |
fd9ede94 | 159 | options->xauth_location = _PATH_XAUTH; |
160 | #endif | |
5260325f | 161 | if (options->strict_modes == -1) |
162 | options->strict_modes = 1; | |
163 | if (options->keepalives == -1) | |
164 | options->keepalives = 1; | |
165 | if (options->log_facility == (SyslogFacility) (-1)) | |
166 | options->log_facility = SYSLOG_FACILITY_AUTH; | |
167 | if (options->log_level == (LogLevel) (-1)) | |
59c97189 | 168 | options->log_level = SYSLOG_LEVEL_INFO; |
5260325f | 169 | if (options->rhosts_authentication == -1) |
170 | options->rhosts_authentication = 0; | |
171 | if (options->rhosts_rsa_authentication == -1) | |
c8d54615 | 172 | options->rhosts_rsa_authentication = 0; |
8002af61 | 173 | if (options->hostbased_authentication == -1) |
174 | options->hostbased_authentication = 0; | |
175 | if (options->hostbased_uses_name_from_packet_only == -1) | |
176 | options->hostbased_uses_name_from_packet_only = 0; | |
5260325f | 177 | if (options->rsa_authentication == -1) |
178 | options->rsa_authentication = 1; | |
fa08c86b | 179 | if (options->pubkey_authentication == -1) |
180 | options->pubkey_authentication = 1; | |
ced49be2 | 181 | #if defined(KRB4) || defined(KRB5) |
5260325f | 182 | if (options->kerberos_authentication == -1) |
183 | options->kerberos_authentication = (access(KEYFILE, R_OK) == 0); | |
184 | if (options->kerberos_or_local_passwd == -1) | |
185 | options->kerberos_or_local_passwd = 1; | |
186 | if (options->kerberos_ticket_cleanup == -1) | |
187 | options->kerberos_ticket_cleanup = 1; | |
ced49be2 | 188 | #endif |
189 | #if defined(AFS) || defined(KRB5) | |
5260325f | 190 | if (options->kerberos_tgt_passing == -1) |
191 | options->kerberos_tgt_passing = 0; | |
ced49be2 | 192 | #endif |
193 | #ifdef AFS | |
5260325f | 194 | if (options->afs_token_passing == -1) |
195 | options->afs_token_passing = k_hasafs(); | |
ced49be2 | 196 | #endif |
5260325f | 197 | if (options->password_authentication == -1) |
198 | options->password_authentication = 1; | |
94ec8c6b | 199 | if (options->kbd_interactive_authentication == -1) |
200 | options->kbd_interactive_authentication = 0; | |
5ba55ada | 201 | if (options->challenge_response_authentication == -1) |
202 | options->challenge_response_authentication = 1; | |
5260325f | 203 | if (options->permit_empty_passwd == -1) |
c8d54615 | 204 | options->permit_empty_passwd = 0; |
5260325f | 205 | if (options->use_login == -1) |
206 | options->use_login = 0; | |
33de75a3 | 207 | if (options->allow_tcp_forwarding == -1) |
208 | options->allow_tcp_forwarding = 1; | |
1d1ffb87 | 209 | if (options->gateway_ports == -1) |
210 | options->gateway_ports = 0; | |
089fbbd2 | 211 | if (options->max_startups == -1) |
212 | options->max_startups = 10; | |
c345cf9d | 213 | if (options->max_startups_rate == -1) |
214 | options->max_startups_rate = 100; /* 100% */ | |
215 | if (options->max_startups_begin == -1) | |
216 | options->max_startups_begin = options->max_startups; | |
61e96248 | 217 | if (options->reverse_mapping_check == -1) |
218 | options->reverse_mapping_check = 0; | |
3ffc6336 | 219 | if (options->client_alive_interval == -1) |
220 | options->client_alive_interval = 0; | |
221 | if (options->client_alive_count_max == -1) | |
222 | options->client_alive_count_max = 3; | |
5df83e07 | 223 | if (options->authorized_keys_file2 == NULL) { |
224 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
225 | if (options->authorized_keys_file != NULL) | |
226 | options->authorized_keys_file2 = options->authorized_keys_file; | |
227 | else | |
228 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
229 | } | |
230 | if (options->authorized_keys_file == NULL) | |
231 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
8efc0c15 | 232 | } |
233 | ||
8efc0c15 | 234 | /* Keyword tokens. */ |
5260325f | 235 | typedef enum { |
236 | sBadOption, /* == unknown option */ | |
e15895cd | 237 | /* Portable-specific options */ |
238 | sPAMAuthenticationViaKbdInt, | |
239 | /* Standard Options */ | |
5260325f | 240 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, |
241 | sPermitRootLogin, sLogFacility, sLogLevel, | |
242 | sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, | |
ced49be2 | 243 | #if defined(KRB4) || defined(KRB5) |
5260325f | 244 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
8efc0c15 | 245 | #endif |
ced49be2 | 246 | #if defined(AFS) || defined(KRB5) |
247 | sKerberosTgtPassing, | |
248 | #endif | |
8efc0c15 | 249 | #ifdef AFS |
ced49be2 | 250 | sAFSTokenPassing, |
8efc0c15 | 251 | #endif |
d464095c | 252 | sChallengeResponseAuthentication, |
94ec8c6b | 253 | sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, |
4f4648f9 | 254 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
255 | sX11Forwarding, sX11DisplayOffset, | |
5c53a31e | 256 | sStrictModes, sEmptyPasswd, sKeepAlives, |
33de75a3 | 257 | sUseLogin, sAllowTcpForwarding, |
258 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, | |
b2552997 | 259 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
fa08c86b | 260 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, |
8002af61 | 261 | sBanner, sReverseMappingCheck, sHostbasedAuthentication, |
3ffc6336 | 262 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
c8445989 | 263 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
2717fa0f | 264 | sDeprecated |
8efc0c15 | 265 | } ServerOpCodes; |
266 | ||
267 | /* Textual representation of the tokens. */ | |
5260325f | 268 | static struct { |
269 | const char *name; | |
270 | ServerOpCodes opcode; | |
271 | } keywords[] = { | |
e15895cd | 272 | /* Portable-specific options */ |
273 | { "PAMAuthenticationViaKbdInt", sPAMAuthenticationViaKbdInt }, | |
274 | /* Standard Options */ | |
5260325f | 275 | { "port", sPort }, |
276 | { "hostkey", sHostKeyFile }, | |
fa08c86b | 277 | { "hostdsakey", sHostKeyFile }, /* alias */ |
2b87da3b | 278 | { "pidfile", sPidFile }, |
5260325f | 279 | { "serverkeybits", sServerKeyBits }, |
280 | { "logingracetime", sLoginGraceTime }, | |
281 | { "keyregenerationinterval", sKeyRegenerationTime }, | |
282 | { "permitrootlogin", sPermitRootLogin }, | |
283 | { "syslogfacility", sLogFacility }, | |
284 | { "loglevel", sLogLevel }, | |
285 | { "rhostsauthentication", sRhostsAuthentication }, | |
286 | { "rhostsrsaauthentication", sRhostsRSAAuthentication }, | |
8002af61 | 287 | { "hostbasedauthentication", sHostbasedAuthentication }, |
288 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, | |
5260325f | 289 | { "rsaauthentication", sRSAAuthentication }, |
fa08c86b | 290 | { "pubkeyauthentication", sPubkeyAuthentication }, |
291 | { "dsaauthentication", sPubkeyAuthentication }, /* alias */ | |
ced49be2 | 292 | #if defined(KRB4) || defined(KRB5) |
5260325f | 293 | { "kerberosauthentication", sKerberosAuthentication }, |
294 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, | |
295 | { "kerberosticketcleanup", sKerberosTicketCleanup }, | |
8efc0c15 | 296 | #endif |
ced49be2 | 297 | #if defined(AFS) || defined(KRB5) |
5260325f | 298 | { "kerberostgtpassing", sKerberosTgtPassing }, |
ced49be2 | 299 | #endif |
300 | #ifdef AFS | |
5260325f | 301 | { "afstokenpassing", sAFSTokenPassing }, |
8efc0c15 | 302 | #endif |
5260325f | 303 | { "passwordauthentication", sPasswordAuthentication }, |
94ec8c6b | 304 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, |
d464095c | 305 | { "challengeresponseauthentication", sChallengeResponseAuthentication }, |
306 | { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ | |
5c53a31e | 307 | { "checkmail", sDeprecated }, |
5260325f | 308 | { "listenaddress", sListenAddress }, |
309 | { "printmotd", sPrintMotd }, | |
4f4648f9 | 310 | { "printlastlog", sPrintLastLog }, |
5260325f | 311 | { "ignorerhosts", sIgnoreRhosts }, |
312 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts }, | |
313 | { "x11forwarding", sX11Forwarding }, | |
314 | { "x11displayoffset", sX11DisplayOffset }, | |
fa649821 | 315 | { "xauthlocation", sXAuthLocation }, |
5260325f | 316 | { "strictmodes", sStrictModes }, |
317 | { "permitemptypasswords", sEmptyPasswd }, | |
318 | { "uselogin", sUseLogin }, | |
5260325f | 319 | { "keepalive", sKeepAlives }, |
33de75a3 | 320 | { "allowtcpforwarding", sAllowTcpForwarding }, |
5260325f | 321 | { "allowusers", sAllowUsers }, |
322 | { "denyusers", sDenyUsers }, | |
323 | { "allowgroups", sAllowGroups }, | |
324 | { "denygroups", sDenyGroups }, | |
a8be9f80 | 325 | { "ciphers", sCiphers }, |
b2552997 | 326 | { "macs", sMacs }, |
a8be9f80 | 327 | { "protocol", sProtocol }, |
1d1ffb87 | 328 | { "gatewayports", sGatewayPorts }, |
38c295d6 | 329 | { "subsystem", sSubsystem }, |
089fbbd2 | 330 | { "maxstartups", sMaxStartups }, |
eea39c02 | 331 | { "banner", sBanner }, |
61e96248 | 332 | { "reversemappingcheck", sReverseMappingCheck }, |
3ffc6336 | 333 | { "clientaliveinterval", sClientAliveInterval }, |
334 | { "clientalivecountmax", sClientAliveCountMax }, | |
c8445989 | 335 | { "authorizedkeysfile", sAuthorizedKeysFile }, |
336 | { "authorizedkeysfile2", sAuthorizedKeysFile2 }, | |
17a3011c | 337 | { NULL, sBadOption } |
8efc0c15 | 338 | }; |
339 | ||
aa3378df | 340 | /* |
6be9a5e8 | 341 | * Returns the number of the token pointed to by cp or sBadOption. |
aa3378df | 342 | */ |
8efc0c15 | 343 | |
6ae2364d | 344 | static ServerOpCodes |
5260325f | 345 | parse_token(const char *cp, const char *filename, |
346 | int linenum) | |
8efc0c15 | 347 | { |
1e3b8b07 | 348 | u_int i; |
8efc0c15 | 349 | |
5260325f | 350 | for (i = 0; keywords[i].name; i++) |
aa3378df | 351 | if (strcasecmp(cp, keywords[i].name) == 0) |
5260325f | 352 | return keywords[i].opcode; |
8efc0c15 | 353 | |
b7c70970 | 354 | error("%s: line %d: Bad configuration option: %s", |
355 | filename, linenum, cp); | |
5260325f | 356 | return sBadOption; |
8efc0c15 | 357 | } |
358 | ||
396c147e | 359 | static void |
2d2a2c65 | 360 | add_listen_addr(ServerOptions *options, char *addr, u_short port) |
48e671d5 | 361 | { |
48e671d5 | 362 | int i; |
363 | ||
364 | if (options->num_ports == 0) | |
365 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
2d2a2c65 | 366 | if (port == 0) |
d11c1288 | 367 | for (i = 0; i < options->num_ports; i++) |
368 | add_one_listen_addr(options, addr, options->ports[i]); | |
369 | else | |
2d2a2c65 | 370 | add_one_listen_addr(options, addr, port); |
d11c1288 | 371 | } |
372 | ||
396c147e | 373 | static void |
d11c1288 | 374 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) |
375 | { | |
376 | struct addrinfo hints, *ai, *aitop; | |
377 | char strport[NI_MAXSERV]; | |
378 | int gaierr; | |
379 | ||
380 | memset(&hints, 0, sizeof(hints)); | |
381 | hints.ai_family = IPv4or6; | |
382 | hints.ai_socktype = SOCK_STREAM; | |
383 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
384 | snprintf(strport, sizeof strport, "%d", port); | |
385 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) | |
386 | fatal("bad addr or host: %s (%s)", | |
387 | addr ? addr : "<NULL>", | |
388 | gai_strerror(gaierr)); | |
389 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) | |
390 | ; | |
391 | ai->ai_next = options->listen_addrs; | |
392 | options->listen_addrs = aitop; | |
48e671d5 | 393 | } |
394 | ||
2717fa0f | 395 | int |
396 | process_server_config_line(ServerOptions *options, char *line, | |
397 | const char *filename, int linenum) | |
8efc0c15 | 398 | { |
d11c1288 | 399 | char *cp, **charptr, *arg, *p; |
2717fa0f | 400 | int *intptr, value; |
5260325f | 401 | ServerOpCodes opcode; |
97de229c | 402 | int i, n; |
5260325f | 403 | |
2717fa0f | 404 | cp = line; |
405 | arg = strdelim(&cp); | |
406 | /* Ignore leading whitespace */ | |
407 | if (*arg == '\0') | |
704b1659 | 408 | arg = strdelim(&cp); |
2717fa0f | 409 | if (!arg || !*arg || *arg == '#') |
410 | return 0; | |
411 | intptr = NULL; | |
412 | charptr = NULL; | |
413 | opcode = parse_token(arg, filename, linenum); | |
414 | switch (opcode) { | |
415 | /* Portable-specific options */ | |
416 | case sPAMAuthenticationViaKbdInt: | |
417 | intptr = &options->pam_authentication_via_kbd_int; | |
418 | goto parse_flag; | |
48e671d5 | 419 | |
2717fa0f | 420 | /* Standard Options */ |
421 | case sBadOption: | |
422 | return -1; | |
423 | case sPort: | |
424 | /* ignore ports from configfile if cmdline specifies ports */ | |
425 | if (options->ports_from_cmdline) | |
426 | return 0; | |
427 | if (options->listen_addrs != NULL) | |
428 | fatal("%s line %d: ports must be specified before " | |
429 | "ListenAdress.", filename, linenum); | |
430 | if (options->num_ports >= MAX_PORTS) | |
431 | fatal("%s line %d: too many ports.", | |
432 | filename, linenum); | |
433 | arg = strdelim(&cp); | |
434 | if (!arg || *arg == '\0') | |
435 | fatal("%s line %d: missing port number.", | |
436 | filename, linenum); | |
437 | options->ports[options->num_ports++] = a2port(arg); | |
438 | if (options->ports[options->num_ports-1] == 0) | |
439 | fatal("%s line %d: Badly formatted port number.", | |
440 | filename, linenum); | |
441 | break; | |
442 | ||
443 | case sServerKeyBits: | |
444 | intptr = &options->server_key_bits; | |
5260325f | 445 | parse_int: |
2717fa0f | 446 | arg = strdelim(&cp); |
447 | if (!arg || *arg == '\0') | |
448 | fatal("%s line %d: missing integer value.", | |
449 | filename, linenum); | |
450 | value = atoi(arg); | |
451 | if (*intptr == -1) | |
452 | *intptr = value; | |
453 | break; | |
454 | ||
455 | case sLoginGraceTime: | |
456 | intptr = &options->login_grace_time; | |
e2b1fb42 | 457 | parse_time: |
2717fa0f | 458 | arg = strdelim(&cp); |
459 | if (!arg || *arg == '\0') | |
460 | fatal("%s line %d: missing time value.", | |
461 | filename, linenum); | |
462 | if ((value = convtime(arg)) == -1) | |
463 | fatal("%s line %d: invalid time value.", | |
464 | filename, linenum); | |
465 | if (*intptr == -1) | |
466 | *intptr = value; | |
467 | break; | |
468 | ||
469 | case sKeyRegenerationTime: | |
470 | intptr = &options->key_regeneration_time; | |
471 | goto parse_time; | |
472 | ||
473 | case sListenAddress: | |
474 | arg = strdelim(&cp); | |
475 | if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0) | |
476 | fatal("%s line %d: missing inet addr.", | |
477 | filename, linenum); | |
478 | if (*arg == '[') { | |
479 | if ((p = strchr(arg, ']')) == NULL) | |
480 | fatal("%s line %d: bad ipv6 inet addr usage.", | |
e2b1fb42 | 481 | filename, linenum); |
2717fa0f | 482 | arg++; |
483 | memmove(p, p+1, strlen(p+1)+1); | |
484 | } else if (((p = strchr(arg, ':')) == NULL) || | |
485 | (strchr(p+1, ':') != NULL)) { | |
486 | add_listen_addr(options, arg, 0); | |
e2b1fb42 | 487 | break; |
2717fa0f | 488 | } |
489 | if (*p == ':') { | |
490 | u_short port; | |
5260325f | 491 | |
2717fa0f | 492 | p++; |
493 | if (*p == '\0') | |
494 | fatal("%s line %d: bad inet addr:port usage.", | |
48e671d5 | 495 | filename, linenum); |
2717fa0f | 496 | else { |
497 | *(p-1) = '\0'; | |
498 | if ((port = a2port(p)) == 0) | |
499 | fatal("%s line %d: bad port number.", | |
d11c1288 | 500 | filename, linenum); |
2717fa0f | 501 | add_listen_addr(options, arg, port); |
d11c1288 | 502 | } |
2717fa0f | 503 | } else if (*p == '\0') |
504 | add_listen_addr(options, arg, 0); | |
505 | else | |
506 | fatal("%s line %d: bad inet addr usage.", | |
507 | filename, linenum); | |
508 | break; | |
509 | ||
510 | case sHostKeyFile: | |
511 | intptr = &options->num_host_key_files; | |
512 | if (*intptr >= MAX_HOSTKEYS) | |
513 | fatal("%s line %d: too many host keys specified (max %d).", | |
514 | filename, linenum, MAX_HOSTKEYS); | |
515 | charptr = &options->host_key_files[*intptr]; | |
fa649821 | 516 | parse_filename: |
2717fa0f | 517 | arg = strdelim(&cp); |
518 | if (!arg || *arg == '\0') | |
519 | fatal("%s line %d: missing file name.", | |
520 | filename, linenum); | |
521 | if (*charptr == NULL) { | |
522 | *charptr = tilde_expand_filename(arg, getuid()); | |
523 | /* increase optional counter */ | |
524 | if (intptr != NULL) | |
525 | *intptr = *intptr + 1; | |
526 | } | |
527 | break; | |
0fbe8c74 | 528 | |
2717fa0f | 529 | case sPidFile: |
530 | charptr = &options->pid_file; | |
531 | goto parse_filename; | |
5260325f | 532 | |
2717fa0f | 533 | case sPermitRootLogin: |
534 | intptr = &options->permit_root_login; | |
535 | arg = strdelim(&cp); | |
536 | if (!arg || *arg == '\0') | |
537 | fatal("%s line %d: missing yes/" | |
538 | "without-password/forced-commands-only/no " | |
539 | "argument.", filename, linenum); | |
540 | value = 0; /* silence compiler */ | |
541 | if (strcmp(arg, "without-password") == 0) | |
542 | value = PERMIT_NO_PASSWD; | |
543 | else if (strcmp(arg, "forced-commands-only") == 0) | |
544 | value = PERMIT_FORCED_ONLY; | |
545 | else if (strcmp(arg, "yes") == 0) | |
546 | value = PERMIT_YES; | |
547 | else if (strcmp(arg, "no") == 0) | |
548 | value = PERMIT_NO; | |
549 | else | |
550 | fatal("%s line %d: Bad yes/" | |
551 | "without-password/forced-commands-only/no " | |
552 | "argument: %s", filename, linenum, arg); | |
553 | if (*intptr == -1) | |
554 | *intptr = value; | |
555 | break; | |
556 | ||
557 | case sIgnoreRhosts: | |
558 | intptr = &options->ignore_rhosts; | |
5260325f | 559 | parse_flag: |
2717fa0f | 560 | arg = strdelim(&cp); |
561 | if (!arg || *arg == '\0') | |
562 | fatal("%s line %d: missing yes/no argument.", | |
563 | filename, linenum); | |
564 | value = 0; /* silence compiler */ | |
565 | if (strcmp(arg, "yes") == 0) | |
566 | value = 1; | |
567 | else if (strcmp(arg, "no") == 0) | |
568 | value = 0; | |
569 | else | |
570 | fatal("%s line %d: Bad yes/no argument: %s", | |
571 | filename, linenum, arg); | |
572 | if (*intptr == -1) | |
573 | *intptr = value; | |
574 | break; | |
575 | ||
576 | case sIgnoreUserKnownHosts: | |
577 | intptr = &options->ignore_user_known_hosts; | |
578 | goto parse_flag; | |
579 | ||
580 | case sRhostsAuthentication: | |
581 | intptr = &options->rhosts_authentication; | |
582 | goto parse_flag; | |
583 | ||
584 | case sRhostsRSAAuthentication: | |
585 | intptr = &options->rhosts_rsa_authentication; | |
586 | goto parse_flag; | |
587 | ||
588 | case sHostbasedAuthentication: | |
589 | intptr = &options->hostbased_authentication; | |
590 | goto parse_flag; | |
591 | ||
592 | case sHostbasedUsesNameFromPacketOnly: | |
593 | intptr = &options->hostbased_uses_name_from_packet_only; | |
594 | goto parse_flag; | |
595 | ||
596 | case sRSAAuthentication: | |
597 | intptr = &options->rsa_authentication; | |
598 | goto parse_flag; | |
599 | ||
600 | case sPubkeyAuthentication: | |
601 | intptr = &options->pubkey_authentication; | |
602 | goto parse_flag; | |
603 | #if defined(KRB4) || defined(KRB5) | |
604 | case sKerberosAuthentication: | |
605 | intptr = &options->kerberos_authentication; | |
606 | goto parse_flag; | |
5260325f | 607 | |
2717fa0f | 608 | case sKerberosOrLocalPasswd: |
609 | intptr = &options->kerberos_or_local_passwd; | |
610 | goto parse_flag; | |
5260325f | 611 | |
2717fa0f | 612 | case sKerberosTicketCleanup: |
613 | intptr = &options->kerberos_ticket_cleanup; | |
614 | goto parse_flag; | |
615 | #endif | |
616 | #if defined(AFS) || defined(KRB5) | |
617 | case sKerberosTgtPassing: | |
618 | intptr = &options->kerberos_tgt_passing; | |
619 | goto parse_flag; | |
620 | #endif | |
621 | #ifdef AFS | |
622 | case sAFSTokenPassing: | |
623 | intptr = &options->afs_token_passing; | |
624 | goto parse_flag; | |
625 | #endif | |
5260325f | 626 | |
2717fa0f | 627 | case sPasswordAuthentication: |
628 | intptr = &options->password_authentication; | |
629 | goto parse_flag; | |
5260325f | 630 | |
2717fa0f | 631 | case sKbdInteractiveAuthentication: |
632 | intptr = &options->kbd_interactive_authentication; | |
633 | goto parse_flag; | |
8002af61 | 634 | |
2717fa0f | 635 | case sChallengeResponseAuthentication: |
636 | intptr = &options->challenge_response_authentication; | |
637 | goto parse_flag; | |
8002af61 | 638 | |
2717fa0f | 639 | case sPrintMotd: |
640 | intptr = &options->print_motd; | |
641 | goto parse_flag; | |
5260325f | 642 | |
2717fa0f | 643 | case sPrintLastLog: |
644 | intptr = &options->print_lastlog; | |
645 | goto parse_flag; | |
5260325f | 646 | |
2717fa0f | 647 | case sX11Forwarding: |
648 | intptr = &options->x11_forwarding; | |
649 | goto parse_flag; | |
5260325f | 650 | |
2717fa0f | 651 | case sX11DisplayOffset: |
652 | intptr = &options->x11_display_offset; | |
653 | goto parse_int; | |
8efc0c15 | 654 | |
2717fa0f | 655 | case sXAuthLocation: |
656 | charptr = &options->xauth_location; | |
657 | goto parse_filename; | |
5260325f | 658 | |
2717fa0f | 659 | case sStrictModes: |
660 | intptr = &options->strict_modes; | |
661 | goto parse_flag; | |
5260325f | 662 | |
2717fa0f | 663 | case sKeepAlives: |
664 | intptr = &options->keepalives; | |
665 | goto parse_flag; | |
33de75a3 | 666 | |
2717fa0f | 667 | case sEmptyPasswd: |
668 | intptr = &options->permit_empty_passwd; | |
669 | goto parse_flag; | |
5260325f | 670 | |
2717fa0f | 671 | case sUseLogin: |
672 | intptr = &options->use_login; | |
673 | goto parse_flag; | |
5260325f | 674 | |
2717fa0f | 675 | case sGatewayPorts: |
676 | intptr = &options->gateway_ports; | |
677 | goto parse_flag; | |
5260325f | 678 | |
2717fa0f | 679 | case sReverseMappingCheck: |
680 | intptr = &options->reverse_mapping_check; | |
681 | goto parse_flag; | |
5260325f | 682 | |
2717fa0f | 683 | case sLogFacility: |
684 | intptr = (int *) &options->log_facility; | |
685 | arg = strdelim(&cp); | |
686 | value = log_facility_number(arg); | |
687 | if (value == (SyslogFacility) - 1) | |
688 | fatal("%.200s line %d: unsupported log facility '%s'", | |
689 | filename, linenum, arg ? arg : "<NONE>"); | |
690 | if (*intptr == -1) | |
691 | *intptr = (SyslogFacility) value; | |
692 | break; | |
693 | ||
694 | case sLogLevel: | |
695 | intptr = (int *) &options->log_level; | |
696 | arg = strdelim(&cp); | |
697 | value = log_level_number(arg); | |
698 | if (value == (LogLevel) - 1) | |
699 | fatal("%.200s line %d: unsupported log level '%s'", | |
700 | filename, linenum, arg ? arg : "<NONE>"); | |
701 | if (*intptr == -1) | |
702 | *intptr = (LogLevel) value; | |
703 | break; | |
704 | ||
705 | case sAllowTcpForwarding: | |
706 | intptr = &options->allow_tcp_forwarding; | |
707 | goto parse_flag; | |
708 | ||
709 | case sAllowUsers: | |
710 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
711 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
712 | fatal("%s line %d: too many allow users.", | |
713 | filename, linenum); | |
714 | options->allow_users[options->num_allow_users++] = xstrdup(arg); | |
715 | } | |
716 | break; | |
a8be9f80 | 717 | |
2717fa0f | 718 | case sDenyUsers: |
719 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
720 | if (options->num_deny_users >= MAX_DENY_USERS) | |
721 | fatal( "%s line %d: too many deny users.", | |
722 | filename, linenum); | |
723 | options->deny_users[options->num_deny_users++] = xstrdup(arg); | |
724 | } | |
725 | break; | |
b2552997 | 726 | |
2717fa0f | 727 | case sAllowGroups: |
728 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
729 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
730 | fatal("%s line %d: too many allow groups.", | |
731 | filename, linenum); | |
732 | options->allow_groups[options->num_allow_groups++] = xstrdup(arg); | |
733 | } | |
734 | break; | |
a8be9f80 | 735 | |
2717fa0f | 736 | case sDenyGroups: |
737 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
738 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
739 | fatal("%s line %d: too many deny groups.", | |
740 | filename, linenum); | |
741 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
742 | } | |
743 | break; | |
38c295d6 | 744 | |
2717fa0f | 745 | case sCiphers: |
746 | arg = strdelim(&cp); | |
747 | if (!arg || *arg == '\0') | |
748 | fatal("%s line %d: Missing argument.", filename, linenum); | |
749 | if (!ciphers_valid(arg)) | |
750 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
751 | filename, linenum, arg ? arg : "<NONE>"); | |
752 | if (options->ciphers == NULL) | |
753 | options->ciphers = xstrdup(arg); | |
754 | break; | |
755 | ||
756 | case sMacs: | |
757 | arg = strdelim(&cp); | |
758 | if (!arg || *arg == '\0') | |
759 | fatal("%s line %d: Missing argument.", filename, linenum); | |
760 | if (!mac_valid(arg)) | |
761 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
762 | filename, linenum, arg ? arg : "<NONE>"); | |
763 | if (options->macs == NULL) | |
764 | options->macs = xstrdup(arg); | |
765 | break; | |
766 | ||
767 | case sProtocol: | |
768 | intptr = &options->protocol; | |
769 | arg = strdelim(&cp); | |
770 | if (!arg || *arg == '\0') | |
771 | fatal("%s line %d: Missing argument.", filename, linenum); | |
772 | value = proto_spec(arg); | |
773 | if (value == SSH_PROTO_UNKNOWN) | |
774 | fatal("%s line %d: Bad protocol spec '%s'.", | |
775 | filename, linenum, arg ? arg : "<NONE>"); | |
776 | if (*intptr == SSH_PROTO_UNKNOWN) | |
777 | *intptr = value; | |
778 | break; | |
779 | ||
780 | case sSubsystem: | |
781 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
782 | fatal("%s line %d: too many subsystems defined.", | |
783 | filename, linenum); | |
784 | } | |
785 | arg = strdelim(&cp); | |
786 | if (!arg || *arg == '\0') | |
787 | fatal("%s line %d: Missing subsystem name.", | |
788 | filename, linenum); | |
789 | for (i = 0; i < options->num_subsystems; i++) | |
790 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
791 | fatal("%s line %d: Subsystem '%s' already defined.", | |
792 | filename, linenum, arg); | |
793 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
794 | arg = strdelim(&cp); | |
795 | if (!arg || *arg == '\0') | |
796 | fatal("%s line %d: Missing subsystem command.", | |
797 | filename, linenum); | |
798 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
799 | options->num_subsystems++; | |
800 | break; | |
801 | ||
802 | case sMaxStartups: | |
803 | arg = strdelim(&cp); | |
804 | if (!arg || *arg == '\0') | |
805 | fatal("%s line %d: Missing MaxStartups spec.", | |
806 | filename, linenum); | |
807 | if ((n = sscanf(arg, "%d:%d:%d", | |
808 | &options->max_startups_begin, | |
809 | &options->max_startups_rate, | |
810 | &options->max_startups)) == 3) { | |
811 | if (options->max_startups_begin > | |
812 | options->max_startups || | |
813 | options->max_startups_rate > 100 || | |
814 | options->max_startups_rate < 1) | |
c345cf9d | 815 | fatal("%s line %d: Illegal MaxStartups spec.", |
97de229c | 816 | filename, linenum); |
2717fa0f | 817 | } else if (n != 1) |
818 | fatal("%s line %d: Illegal MaxStartups spec.", | |
819 | filename, linenum); | |
820 | else | |
821 | options->max_startups = options->max_startups_begin; | |
822 | break; | |
823 | ||
824 | case sBanner: | |
825 | charptr = &options->banner; | |
826 | goto parse_filename; | |
827 | /* | |
828 | * These options can contain %X options expanded at | |
829 | * connect time, so that you can specify paths like: | |
830 | * | |
831 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
832 | */ | |
833 | case sAuthorizedKeysFile: | |
834 | case sAuthorizedKeysFile2: | |
835 | charptr = (opcode == sAuthorizedKeysFile ) ? | |
836 | &options->authorized_keys_file : | |
837 | &options->authorized_keys_file2; | |
838 | goto parse_filename; | |
839 | ||
840 | case sClientAliveInterval: | |
841 | intptr = &options->client_alive_interval; | |
842 | goto parse_time; | |
843 | ||
844 | case sClientAliveCountMax: | |
845 | intptr = &options->client_alive_count_max; | |
846 | goto parse_int; | |
847 | ||
848 | case sDeprecated: | |
849 | log("%s line %d: Deprecated option %s", | |
850 | filename, linenum, arg); | |
851 | while (arg) | |
852 | arg = strdelim(&cp); | |
853 | break; | |
854 | ||
855 | default: | |
856 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
857 | filename, linenum, arg, opcode); | |
858 | } | |
859 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
860 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
861 | filename, linenum, arg); | |
862 | return 0; | |
863 | } | |
089fbbd2 | 864 | |
2717fa0f | 865 | /* Reads the server configuration file. */ |
5c53a31e | 866 | |
2717fa0f | 867 | void |
868 | read_server_config(ServerOptions *options, const char *filename) | |
869 | { | |
870 | FILE *f; | |
871 | char line[1024]; | |
872 | int linenum; | |
873 | int bad_options = 0; | |
874 | ||
875 | f = fopen(filename, "r"); | |
876 | if (!f) { | |
877 | perror(filename); | |
878 | exit(1); | |
879 | } | |
880 | linenum = 0; | |
881 | while (fgets(line, sizeof(line), f)) { | |
882 | /* Update line number counter. */ | |
883 | linenum++; | |
884 | if (process_server_config_line(options, line, filename, linenum) != 0) | |
885 | bad_options++; | |
8efc0c15 | 886 | } |
5260325f | 887 | fclose(f); |
b7c70970 | 888 | if (bad_options > 0) |
889 | fatal("%s: terminating, %d bad configuration options", | |
890 | filename, bad_options); | |
8efc0c15 | 891 | } |