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8086aeb2 | 1 | /* $OpenBSD: servconf.c,v 1.184 2008/06/15 16:58:40 dtucker Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
6ae2364d | 5 | * |
bcbf86ec | 6 | * As far as I am concerned, the code I have written for this software |
7 | * can be used freely for any purpose. Any derived versions of this | |
8 | * software must be clearly marked as such, and if the derived work is | |
9 | * incompatible with the protocol description in the RFC file, it must be | |
10 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 11 | */ |
8efc0c15 | 12 | |
13 | #include "includes.h" | |
8efc0c15 | 14 | |
5b04a8bf | 15 | #include <sys/types.h> |
16 | #include <sys/socket.h> | |
17 | ||
28cb0a43 | 18 | #include <netdb.h> |
fa47fe3c | 19 | #include <pwd.h> |
cf851879 | 20 | #include <stdio.h> |
ffa517a8 | 21 | #include <stdlib.h> |
00146caa | 22 | #include <string.h> |
31652869 | 23 | #include <signal.h> |
5188ba17 | 24 | #include <unistd.h> |
31652869 | 25 | #include <stdarg.h> |
1760c982 | 26 | #include <errno.h> |
c8dfff33 | 27 | |
3593bdc0 | 28 | #include "openbsd-compat/sys-queue.h" |
31652869 | 29 | #include "xmalloc.h" |
8efc0c15 | 30 | #include "ssh.h" |
42f11eb2 | 31 | #include "log.h" |
31652869 | 32 | #include "buffer.h" |
8efc0c15 | 33 | #include "servconf.h" |
a8be9f80 | 34 | #include "compat.h" |
42f11eb2 | 35 | #include "pathnames.h" |
42f11eb2 | 36 | #include "misc.h" |
37 | #include "cipher.h" | |
31652869 | 38 | #include "key.h" |
b2552997 | 39 | #include "kex.h" |
40 | #include "mac.h" | |
d231781a | 41 | #include "match.h" |
2fefbadf | 42 | #include "channels.h" |
fa47fe3c | 43 | #include "groupaccess.h" |
42f11eb2 | 44 | |
396c147e | 45 | static void add_listen_addr(ServerOptions *, char *, u_short); |
46 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
48e671d5 | 47 | |
1853d1ef | 48 | /* Use of privilege separation or not */ |
49 | extern int use_privsep; | |
d231781a | 50 | extern Buffer cfg; |
42f11eb2 | 51 | |
8efc0c15 | 52 | /* Initializes the server options to their default values. */ |
53 | ||
6ae2364d | 54 | void |
5260325f | 55 | initialize_server_options(ServerOptions *options) |
8efc0c15 | 56 | { |
5260325f | 57 | memset(options, 0, sizeof(*options)); |
e15895cd | 58 | |
59 | /* Portable-specific options */ | |
7fceb20d | 60 | options->use_pam = -1; |
e15895cd | 61 | |
62 | /* Standard Options */ | |
48e671d5 | 63 | options->num_ports = 0; |
64 | options->ports_from_cmdline = 0; | |
65 | options->listen_addrs = NULL; | |
31b41ceb | 66 | options->address_family = -1; |
fa08c86b | 67 | options->num_host_key_files = 0; |
0fbe8c74 | 68 | options->pid_file = NULL; |
5260325f | 69 | options->server_key_bits = -1; |
70 | options->login_grace_time = -1; | |
71 | options->key_regeneration_time = -1; | |
15853e93 | 72 | options->permit_root_login = PERMIT_NOT_SET; |
5260325f | 73 | options->ignore_rhosts = -1; |
74 | options->ignore_user_known_hosts = -1; | |
75 | options->print_motd = -1; | |
4f4648f9 | 76 | options->print_lastlog = -1; |
5260325f | 77 | options->x11_forwarding = -1; |
78 | options->x11_display_offset = -1; | |
e6e573bd | 79 | options->x11_use_localhost = -1; |
fa649821 | 80 | options->xauth_location = NULL; |
5260325f | 81 | options->strict_modes = -1; |
fd573618 | 82 | options->tcp_keep_alive = -1; |
5eaf8578 | 83 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
84 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
5260325f | 85 | options->rhosts_rsa_authentication = -1; |
8002af61 | 86 | options->hostbased_authentication = -1; |
87 | options->hostbased_uses_name_from_packet_only = -1; | |
5260325f | 88 | options->rsa_authentication = -1; |
fa08c86b | 89 | options->pubkey_authentication = -1; |
5260325f | 90 | options->kerberos_authentication = -1; |
91 | options->kerberos_or_local_passwd = -1; | |
92 | options->kerberos_ticket_cleanup = -1; | |
a1e30b47 | 93 | options->kerberos_get_afs_token = -1; |
7364bd04 | 94 | options->gss_authentication=-1; |
95 | options->gss_cleanup_creds = -1; | |
5260325f | 96 | options->password_authentication = -1; |
94ec8c6b | 97 | options->kbd_interactive_authentication = -1; |
5ba55ada | 98 | options->challenge_response_authentication = -1; |
5260325f | 99 | options->permit_empty_passwd = -1; |
f00bab84 | 100 | options->permit_user_env = -1; |
5260325f | 101 | options->use_login = -1; |
636f76ca | 102 | options->compression = -1; |
33de75a3 | 103 | options->allow_tcp_forwarding = -1; |
43c3f85c | 104 | options->allow_agent_forwarding = -1; |
5260325f | 105 | options->num_allow_users = 0; |
106 | options->num_deny_users = 0; | |
107 | options->num_allow_groups = 0; | |
108 | options->num_deny_groups = 0; | |
a8be9f80 | 109 | options->ciphers = NULL; |
b2552997 | 110 | options->macs = NULL; |
a8be9f80 | 111 | options->protocol = SSH_PROTO_UNKNOWN; |
1d1ffb87 | 112 | options->gateway_ports = -1; |
38c295d6 | 113 | options->num_subsystems = 0; |
c345cf9d | 114 | options->max_startups_begin = -1; |
115 | options->max_startups_rate = -1; | |
089fbbd2 | 116 | options->max_startups = -1; |
af4bd935 | 117 | options->max_authtries = -1; |
c6dca55e | 118 | options->max_sessions = -1; |
eea39c02 | 119 | options->banner = NULL; |
c5a7d788 | 120 | options->use_dns = -1; |
3ffc6336 | 121 | options->client_alive_interval = -1; |
122 | options->client_alive_count_max = -1; | |
c8445989 | 123 | options->authorized_keys_file = NULL; |
124 | options->authorized_keys_file2 = NULL; | |
61a2c1da | 125 | options->num_accept_env = 0; |
d20f3c9e | 126 | options->permit_tun = -1; |
ea46e550 | 127 | options->num_permitted_opens = -1; |
e7259e8d | 128 | options->adm_forced_command = NULL; |
db49deeb | 129 | options->chroot_directory = NULL; |
8efc0c15 | 130 | } |
131 | ||
6ae2364d | 132 | void |
5260325f | 133 | fill_default_server_options(ServerOptions *options) |
8efc0c15 | 134 | { |
e15895cd | 135 | /* Portable-specific options */ |
7fceb20d | 136 | if (options->use_pam == -1) |
0a23d79f | 137 | options->use_pam = 0; |
e15895cd | 138 | |
139 | /* Standard Options */ | |
fa08c86b | 140 | if (options->protocol == SSH_PROTO_UNKNOWN) |
141 | options->protocol = SSH_PROTO_1|SSH_PROTO_2; | |
142 | if (options->num_host_key_files == 0) { | |
143 | /* fill default hostkeys for protocols */ | |
144 | if (options->protocol & SSH_PROTO_1) | |
0f84fe37 | 145 | options->host_key_files[options->num_host_key_files++] = |
146 | _PATH_HOST_KEY_FILE; | |
147 | if (options->protocol & SSH_PROTO_2) { | |
148 | options->host_key_files[options->num_host_key_files++] = | |
149 | _PATH_HOST_RSA_KEY_FILE; | |
150 | options->host_key_files[options->num_host_key_files++] = | |
151 | _PATH_HOST_DSA_KEY_FILE; | |
152 | } | |
fa08c86b | 153 | } |
48e671d5 | 154 | if (options->num_ports == 0) |
155 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
156 | if (options->listen_addrs == NULL) | |
2d2a2c65 | 157 | add_listen_addr(options, NULL, 0); |
0fbe8c74 | 158 | if (options->pid_file == NULL) |
42f11eb2 | 159 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
5260325f | 160 | if (options->server_key_bits == -1) |
161 | options->server_key_bits = 768; | |
162 | if (options->login_grace_time == -1) | |
3445ca02 | 163 | options->login_grace_time = 120; |
5260325f | 164 | if (options->key_regeneration_time == -1) |
165 | options->key_regeneration_time = 3600; | |
15853e93 | 166 | if (options->permit_root_login == PERMIT_NOT_SET) |
167 | options->permit_root_login = PERMIT_YES; | |
5260325f | 168 | if (options->ignore_rhosts == -1) |
c8d54615 | 169 | options->ignore_rhosts = 1; |
5260325f | 170 | if (options->ignore_user_known_hosts == -1) |
171 | options->ignore_user_known_hosts = 0; | |
5260325f | 172 | if (options->print_motd == -1) |
173 | options->print_motd = 1; | |
4f4648f9 | 174 | if (options->print_lastlog == -1) |
175 | options->print_lastlog = 1; | |
5260325f | 176 | if (options->x11_forwarding == -1) |
c8d54615 | 177 | options->x11_forwarding = 0; |
5260325f | 178 | if (options->x11_display_offset == -1) |
c8d54615 | 179 | options->x11_display_offset = 10; |
e6e573bd | 180 | if (options->x11_use_localhost == -1) |
181 | options->x11_use_localhost = 1; | |
fa649821 | 182 | if (options->xauth_location == NULL) |
fd9ede94 | 183 | options->xauth_location = _PATH_XAUTH; |
5260325f | 184 | if (options->strict_modes == -1) |
185 | options->strict_modes = 1; | |
fd573618 | 186 | if (options->tcp_keep_alive == -1) |
187 | options->tcp_keep_alive = 1; | |
5eaf8578 | 188 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
5260325f | 189 | options->log_facility = SYSLOG_FACILITY_AUTH; |
5eaf8578 | 190 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
59c97189 | 191 | options->log_level = SYSLOG_LEVEL_INFO; |
5260325f | 192 | if (options->rhosts_rsa_authentication == -1) |
c8d54615 | 193 | options->rhosts_rsa_authentication = 0; |
8002af61 | 194 | if (options->hostbased_authentication == -1) |
195 | options->hostbased_authentication = 0; | |
196 | if (options->hostbased_uses_name_from_packet_only == -1) | |
197 | options->hostbased_uses_name_from_packet_only = 0; | |
5260325f | 198 | if (options->rsa_authentication == -1) |
199 | options->rsa_authentication = 1; | |
fa08c86b | 200 | if (options->pubkey_authentication == -1) |
201 | options->pubkey_authentication = 1; | |
5260325f | 202 | if (options->kerberos_authentication == -1) |
eadc806d | 203 | options->kerberos_authentication = 0; |
5260325f | 204 | if (options->kerberos_or_local_passwd == -1) |
205 | options->kerberos_or_local_passwd = 1; | |
206 | if (options->kerberos_ticket_cleanup == -1) | |
207 | options->kerberos_ticket_cleanup = 1; | |
a1e30b47 | 208 | if (options->kerberos_get_afs_token == -1) |
209 | options->kerberos_get_afs_token = 0; | |
7364bd04 | 210 | if (options->gss_authentication == -1) |
211 | options->gss_authentication = 0; | |
212 | if (options->gss_cleanup_creds == -1) | |
213 | options->gss_cleanup_creds = 1; | |
5260325f | 214 | if (options->password_authentication == -1) |
215 | options->password_authentication = 1; | |
94ec8c6b | 216 | if (options->kbd_interactive_authentication == -1) |
217 | options->kbd_interactive_authentication = 0; | |
5ba55ada | 218 | if (options->challenge_response_authentication == -1) |
219 | options->challenge_response_authentication = 1; | |
5260325f | 220 | if (options->permit_empty_passwd == -1) |
c8d54615 | 221 | options->permit_empty_passwd = 0; |
f00bab84 | 222 | if (options->permit_user_env == -1) |
223 | options->permit_user_env = 0; | |
5260325f | 224 | if (options->use_login == -1) |
225 | options->use_login = 0; | |
636f76ca | 226 | if (options->compression == -1) |
07200973 | 227 | options->compression = COMP_DELAYED; |
33de75a3 | 228 | if (options->allow_tcp_forwarding == -1) |
229 | options->allow_tcp_forwarding = 1; | |
43c3f85c | 230 | if (options->allow_agent_forwarding == -1) |
231 | options->allow_agent_forwarding = 1; | |
1d1ffb87 | 232 | if (options->gateway_ports == -1) |
233 | options->gateway_ports = 0; | |
089fbbd2 | 234 | if (options->max_startups == -1) |
235 | options->max_startups = 10; | |
c345cf9d | 236 | if (options->max_startups_rate == -1) |
237 | options->max_startups_rate = 100; /* 100% */ | |
238 | if (options->max_startups_begin == -1) | |
239 | options->max_startups_begin = options->max_startups; | |
af4bd935 | 240 | if (options->max_authtries == -1) |
241 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; | |
c6dca55e | 242 | if (options->max_sessions == -1) |
243 | options->max_sessions = DEFAULT_SESSIONS_MAX; | |
c5a7d788 | 244 | if (options->use_dns == -1) |
245 | options->use_dns = 1; | |
3ffc6336 | 246 | if (options->client_alive_interval == -1) |
184eed6a | 247 | options->client_alive_interval = 0; |
3ffc6336 | 248 | if (options->client_alive_count_max == -1) |
249 | options->client_alive_count_max = 3; | |
5df83e07 | 250 | if (options->authorized_keys_file2 == NULL) { |
251 | /* authorized_keys_file2 falls back to authorized_keys_file */ | |
252 | if (options->authorized_keys_file != NULL) | |
253 | options->authorized_keys_file2 = options->authorized_keys_file; | |
254 | else | |
255 | options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2; | |
256 | } | |
257 | if (options->authorized_keys_file == NULL) | |
258 | options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; | |
d20f3c9e | 259 | if (options->permit_tun == -1) |
a4f24bf8 | 260 | options->permit_tun = SSH_TUNMODE_NO; |
1853d1ef | 261 | |
2ee1b704 | 262 | /* Turn privilege separation on by default */ |
1853d1ef | 263 | if (use_privsep == -1) |
2ee1b704 | 264 | use_privsep = 1; |
e299a298 | 265 | |
4165b82e | 266 | #ifndef HAVE_MMAP |
e299a298 | 267 | if (use_privsep && options->compression == 1) { |
268 | error("This platform does not support both privilege " | |
269 | "separation and compression"); | |
270 | error("Compression disabled"); | |
271 | options->compression = 0; | |
272 | } | |
273 | #endif | |
274 | ||
8efc0c15 | 275 | } |
276 | ||
8efc0c15 | 277 | /* Keyword tokens. */ |
5260325f | 278 | typedef enum { |
279 | sBadOption, /* == unknown option */ | |
e15895cd | 280 | /* Portable-specific options */ |
7fceb20d | 281 | sUsePAM, |
e15895cd | 282 | /* Standard Options */ |
5260325f | 283 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, |
284 | sPermitRootLogin, sLogFacility, sLogLevel, | |
0598d99d | 285 | sRhostsRSAAuthentication, sRSAAuthentication, |
5260325f | 286 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
a1e30b47 | 287 | sKerberosGetAFSToken, |
1c590258 | 288 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
31b41ceb | 289 | sPasswordAuthentication, sKbdInteractiveAuthentication, |
290 | sListenAddress, sAddressFamily, | |
4f4648f9 | 291 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e6e573bd | 292 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
fd573618 | 293 | sStrictModes, sEmptyPasswd, sTCPKeepAlive, |
f00bab84 | 294 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
33de75a3 | 295 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
b2552997 | 296 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
af4bd935 | 297 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, |
c6dca55e | 298 | sMaxStartups, sMaxAuthTries, sMaxSessions, |
c5a7d788 | 299 | sBanner, sUseDNS, sHostbasedAuthentication, |
184eed6a | 300 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
c8445989 | 301 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
d20f3c9e | 302 | sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel, |
db49deeb | 303 | sMatch, sPermitOpen, sForceCommand, sChrootDirectory, |
43c3f85c | 304 | sUsePrivilegeSeparation, sAllowAgentForwarding, |
a2144546 | 305 | sDeprecated, sUnsupported |
8efc0c15 | 306 | } ServerOpCodes; |
307 | ||
d231781a | 308 | #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */ |
309 | #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */ | |
310 | #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH) | |
311 | ||
8efc0c15 | 312 | /* Textual representation of the tokens. */ |
5260325f | 313 | static struct { |
314 | const char *name; | |
315 | ServerOpCodes opcode; | |
d231781a | 316 | u_int flags; |
5260325f | 317 | } keywords[] = { |
e15895cd | 318 | /* Portable-specific options */ |
b06b11ad | 319 | #ifdef USE_PAM |
d231781a | 320 | { "usepam", sUsePAM, SSHCFG_GLOBAL }, |
b06b11ad | 321 | #else |
d231781a | 322 | { "usepam", sUnsupported, SSHCFG_GLOBAL }, |
b06b11ad | 323 | #endif |
d231781a | 324 | { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL }, |
e15895cd | 325 | /* Standard Options */ |
d231781a | 326 | { "port", sPort, SSHCFG_GLOBAL }, |
327 | { "hostkey", sHostKeyFile, SSHCFG_GLOBAL }, | |
328 | { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */ | |
329 | { "pidfile", sPidFile, SSHCFG_GLOBAL }, | |
330 | { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL }, | |
331 | { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL }, | |
332 | { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL }, | |
2ef741a3 | 333 | { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL }, |
d231781a | 334 | { "syslogfacility", sLogFacility, SSHCFG_GLOBAL }, |
335 | { "loglevel", sLogLevel, SSHCFG_GLOBAL }, | |
336 | { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL }, | |
03bcbf84 | 337 | { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, |
338 | { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, | |
d231781a | 339 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL }, |
03bcbf84 | 340 | { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, |
341 | { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, | |
d231781a | 342 | { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ |
1c590258 | 343 | #ifdef KRB5 |
03bcbf84 | 344 | { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, |
d231781a | 345 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, |
346 | { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, | |
bcfcc5f9 | 347 | #ifdef USE_AFS |
d231781a | 348 | { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, |
309af4e5 | 349 | #else |
d231781a | 350 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, |
309af4e5 | 351 | #endif |
a2144546 | 352 | #else |
03bcbf84 | 353 | { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, |
d231781a | 354 | { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, |
355 | { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, | |
356 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, | |
a2144546 | 357 | #endif |
d231781a | 358 | { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, |
359 | { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, | |
7364bd04 | 360 | #ifdef GSSAPI |
03bcbf84 | 361 | { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, |
d231781a | 362 | { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, |
7364bd04 | 363 | #else |
03bcbf84 | 364 | { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, |
d231781a | 365 | { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, |
7364bd04 | 366 | #endif |
03bcbf84 | 367 | { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, |
368 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, | |
121c4a34 | 369 | { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, |
d231781a | 370 | { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */ |
371 | { "checkmail", sDeprecated, SSHCFG_GLOBAL }, | |
372 | { "listenaddress", sListenAddress, SSHCFG_GLOBAL }, | |
373 | { "addressfamily", sAddressFamily, SSHCFG_GLOBAL }, | |
374 | { "printmotd", sPrintMotd, SSHCFG_GLOBAL }, | |
375 | { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL }, | |
376 | { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL }, | |
377 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL }, | |
691712e0 | 378 | { "x11forwarding", sX11Forwarding, SSHCFG_ALL }, |
379 | { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL }, | |
380 | { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL }, | |
d231781a | 381 | { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL }, |
382 | { "strictmodes", sStrictModes, SSHCFG_GLOBAL }, | |
383 | { "permitemptypasswords", sEmptyPasswd, SSHCFG_GLOBAL }, | |
384 | { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL }, | |
385 | { "uselogin", sUseLogin, SSHCFG_GLOBAL }, | |
386 | { "compression", sCompression, SSHCFG_GLOBAL }, | |
387 | { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, | |
388 | { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */ | |
389 | { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL }, | |
43c3f85c | 390 | { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL }, |
d231781a | 391 | { "allowusers", sAllowUsers, SSHCFG_GLOBAL }, |
392 | { "denyusers", sDenyUsers, SSHCFG_GLOBAL }, | |
393 | { "allowgroups", sAllowGroups, SSHCFG_GLOBAL }, | |
394 | { "denygroups", sDenyGroups, SSHCFG_GLOBAL }, | |
395 | { "ciphers", sCiphers, SSHCFG_GLOBAL }, | |
396 | { "macs", sMacs, SSHCFG_GLOBAL }, | |
397 | { "protocol", sProtocol, SSHCFG_GLOBAL }, | |
398 | { "gatewayports", sGatewayPorts, SSHCFG_ALL }, | |
399 | { "subsystem", sSubsystem, SSHCFG_GLOBAL }, | |
400 | { "maxstartups", sMaxStartups, SSHCFG_GLOBAL }, | |
8086aeb2 | 401 | { "maxauthtries", sMaxAuthTries, SSHCFG_ALL }, |
c6dca55e | 402 | { "maxsessions", sMaxSessions, SSHCFG_ALL }, |
03bcbf84 | 403 | { "banner", sBanner, SSHCFG_ALL }, |
d231781a | 404 | { "usedns", sUseDNS, SSHCFG_GLOBAL }, |
405 | { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL }, | |
406 | { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL }, | |
407 | { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL }, | |
408 | { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL }, | |
409 | { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL }, | |
410 | { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL }, | |
411 | { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL }, | |
412 | { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL }, | |
413 | { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL }, | |
2fefbadf | 414 | { "match", sMatch, SSHCFG_ALL }, |
415 | { "permitopen", sPermitOpen, SSHCFG_ALL }, | |
e7259e8d | 416 | { "forcecommand", sForceCommand, SSHCFG_ALL }, |
db49deeb | 417 | { "chrootdirectory", sChrootDirectory, SSHCFG_ALL }, |
d231781a | 418 | { NULL, sBadOption, 0 } |
8efc0c15 | 419 | }; |
420 | ||
1760c982 | 421 | static struct { |
422 | int val; | |
423 | char *text; | |
424 | } tunmode_desc[] = { | |
425 | { SSH_TUNMODE_NO, "no" }, | |
426 | { SSH_TUNMODE_POINTOPOINT, "point-to-point" }, | |
427 | { SSH_TUNMODE_ETHERNET, "ethernet" }, | |
428 | { SSH_TUNMODE_YES, "yes" }, | |
429 | { -1, NULL } | |
430 | }; | |
431 | ||
aa3378df | 432 | /* |
6be9a5e8 | 433 | * Returns the number of the token pointed to by cp or sBadOption. |
aa3378df | 434 | */ |
8efc0c15 | 435 | |
6ae2364d | 436 | static ServerOpCodes |
5260325f | 437 | parse_token(const char *cp, const char *filename, |
d231781a | 438 | int linenum, u_int *flags) |
8efc0c15 | 439 | { |
1e3b8b07 | 440 | u_int i; |
8efc0c15 | 441 | |
5260325f | 442 | for (i = 0; keywords[i].name; i++) |
d231781a | 443 | if (strcasecmp(cp, keywords[i].name) == 0) { |
444 | *flags = keywords[i].flags; | |
5260325f | 445 | return keywords[i].opcode; |
d231781a | 446 | } |
8efc0c15 | 447 | |
b7c70970 | 448 | error("%s: line %d: Bad configuration option: %s", |
449 | filename, linenum, cp); | |
5260325f | 450 | return sBadOption; |
8efc0c15 | 451 | } |
452 | ||
396c147e | 453 | static void |
2d2a2c65 | 454 | add_listen_addr(ServerOptions *options, char *addr, u_short port) |
48e671d5 | 455 | { |
2ceb8101 | 456 | u_int i; |
48e671d5 | 457 | |
458 | if (options->num_ports == 0) | |
459 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
31b41ceb | 460 | if (options->address_family == -1) |
461 | options->address_family = AF_UNSPEC; | |
2d2a2c65 | 462 | if (port == 0) |
d11c1288 | 463 | for (i = 0; i < options->num_ports; i++) |
464 | add_one_listen_addr(options, addr, options->ports[i]); | |
465 | else | |
2d2a2c65 | 466 | add_one_listen_addr(options, addr, port); |
d11c1288 | 467 | } |
468 | ||
396c147e | 469 | static void |
d11c1288 | 470 | add_one_listen_addr(ServerOptions *options, char *addr, u_short port) |
471 | { | |
472 | struct addrinfo hints, *ai, *aitop; | |
473 | char strport[NI_MAXSERV]; | |
474 | int gaierr; | |
475 | ||
476 | memset(&hints, 0, sizeof(hints)); | |
31b41ceb | 477 | hints.ai_family = options->address_family; |
d11c1288 | 478 | hints.ai_socktype = SOCK_STREAM; |
479 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
7528d467 | 480 | snprintf(strport, sizeof strport, "%u", port); |
d11c1288 | 481 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
482 | fatal("bad addr or host: %s (%s)", | |
483 | addr ? addr : "<NULL>", | |
bb4626fe | 484 | ssh_gai_strerror(gaierr)); |
d11c1288 | 485 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
486 | ; | |
487 | ai->ai_next = options->listen_addrs; | |
488 | options->listen_addrs = aitop; | |
48e671d5 | 489 | } |
490 | ||
d231781a | 491 | /* |
492 | * The strategy for the Match blocks is that the config file is parsed twice. | |
493 | * | |
494 | * The first time is at startup. activep is initialized to 1 and the | |
495 | * directives in the global context are processed and acted on. Hitting a | |
496 | * Match directive unsets activep and the directives inside the block are | |
497 | * checked for syntax only. | |
498 | * | |
499 | * The second time is after a connection has been established but before | |
500 | * authentication. activep is initialized to 2 and global config directives | |
501 | * are ignored since they have already been processed. If the criteria in a | |
502 | * Match block is met, activep is set and the subsequent directives | |
503 | * processed and actioned until EOF or another Match block unsets it. Any | |
504 | * options set are copied into the main server config. | |
505 | * | |
506 | * Potential additions/improvements: | |
507 | * - Add Match support for pre-kex directives, eg Protocol, Ciphers. | |
508 | * | |
509 | * - Add a Tag directive (idea from David Leonard) ala pf, eg: | |
510 | * Match Address 192.168.0.* | |
511 | * Tag trusted | |
512 | * Match Group wheel | |
513 | * Tag trusted | |
514 | * Match Tag trusted | |
515 | * AllowTcpForwarding yes | |
516 | * GatewayPorts clientspecified | |
517 | * [...] | |
518 | * | |
519 | * - Add a PermittedChannelRequests directive | |
520 | * Match Group shell | |
521 | * PermittedChannelRequests session,forwarded-tcpip | |
522 | */ | |
523 | ||
fa47fe3c | 524 | static int |
525 | match_cfg_line_group(const char *grps, int line, const char *user) | |
526 | { | |
527 | int result = 0; | |
528 | u_int ngrps = 0; | |
529 | char *arg, *p, *cp, *grplist[MAX_MATCH_GROUPS]; | |
530 | struct passwd *pw; | |
531 | ||
532 | /* | |
533 | * Even if we do not have a user yet, we still need to check for | |
534 | * valid syntax. | |
535 | */ | |
536 | arg = cp = xstrdup(grps); | |
537 | while ((p = strsep(&cp, ",")) != NULL && *p != '\0') { | |
538 | if (ngrps >= MAX_MATCH_GROUPS) { | |
539 | error("line %d: too many groups in Match Group", line); | |
540 | result = -1; | |
541 | goto out; | |
542 | } | |
543 | grplist[ngrps++] = p; | |
544 | } | |
545 | ||
546 | if (user == NULL) | |
547 | goto out; | |
548 | ||
549 | if ((pw = getpwnam(user)) == NULL) { | |
550 | debug("Can't match group at line %d because user %.100s does " | |
551 | "not exist", line, user); | |
552 | } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) { | |
553 | debug("Can't Match group because user %.100s not in any group " | |
554 | "at line %d", user, line); | |
555 | } else if (ga_match(grplist, ngrps) != 1) { | |
556 | debug("user %.100s does not match group %.100s at line %d", | |
557 | user, arg, line); | |
558 | } else { | |
559 | debug("user %.100s matched group %.100s at line %d", user, | |
560 | arg, line); | |
561 | result = 1; | |
562 | } | |
563 | out: | |
564 | ga_free(); | |
565 | xfree(arg); | |
566 | return result; | |
567 | } | |
568 | ||
d231781a | 569 | static int |
570 | match_cfg_line(char **condition, int line, const char *user, const char *host, | |
571 | const char *address) | |
572 | { | |
573 | int result = 1; | |
574 | char *arg, *attrib, *cp = *condition; | |
575 | size_t len; | |
576 | ||
577 | if (user == NULL) | |
578 | debug3("checking syntax for 'Match %s'", cp); | |
579 | else | |
580 | debug3("checking match for '%s' user %s host %s addr %s", cp, | |
581 | user ? user : "(null)", host ? host : "(null)", | |
582 | address ? address : "(null)"); | |
583 | ||
584 | while ((attrib = strdelim(&cp)) && *attrib != '\0') { | |
585 | if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { | |
586 | error("Missing Match criteria for %s", attrib); | |
587 | return -1; | |
588 | } | |
589 | len = strlen(arg); | |
590 | if (strcasecmp(attrib, "user") == 0) { | |
591 | if (!user) { | |
592 | result = 0; | |
593 | continue; | |
594 | } | |
595 | if (match_pattern_list(user, arg, len, 0) != 1) | |
596 | result = 0; | |
597 | else | |
598 | debug("user %.100s matched 'User %.100s' at " | |
599 | "line %d", user, arg, line); | |
fa47fe3c | 600 | } else if (strcasecmp(attrib, "group") == 0) { |
601 | switch (match_cfg_line_group(arg, line, user)) { | |
602 | case -1: | |
603 | return -1; | |
604 | case 0: | |
605 | result = 0; | |
606 | } | |
d231781a | 607 | } else if (strcasecmp(attrib, "host") == 0) { |
608 | if (!host) { | |
609 | result = 0; | |
610 | continue; | |
611 | } | |
612 | if (match_hostname(host, arg, len) != 1) | |
613 | result = 0; | |
614 | else | |
615 | debug("connection from %.100s matched 'Host " | |
616 | "%.100s' at line %d", host, arg, line); | |
617 | } else if (strcasecmp(attrib, "address") == 0) { | |
15b5fa9b | 618 | switch (addr_match_list(address, arg)) { |
619 | case 1: | |
d231781a | 620 | debug("connection from %.100s matched 'Address " |
621 | "%.100s' at line %d", address, arg, line); | |
15b5fa9b | 622 | break; |
623 | case 0: | |
b3b048d6 | 624 | case -1: |
15b5fa9b | 625 | result = 0; |
626 | break; | |
b3b048d6 | 627 | case -2: |
15b5fa9b | 628 | return -1; |
629 | } | |
d231781a | 630 | } else { |
631 | error("Unsupported Match attribute %s", attrib); | |
632 | return -1; | |
633 | } | |
634 | } | |
635 | if (user != NULL) | |
636 | debug3("match %sfound", result ? "" : "not "); | |
637 | *condition = cp; | |
638 | return result; | |
639 | } | |
640 | ||
e7259e8d | 641 | #define WHITESPACE " \t\r\n" |
642 | ||
2717fa0f | 643 | int |
644 | process_server_config_line(ServerOptions *options, char *line, | |
d231781a | 645 | const char *filename, int linenum, int *activep, const char *user, |
646 | const char *host, const char *address) | |
8efc0c15 | 647 | { |
d11c1288 | 648 | char *cp, **charptr, *arg, *p; |
d231781a | 649 | int cmdline = 0, *intptr, value, n; |
2a72bc03 | 650 | SyslogFacility *log_facility_ptr; |
651 | LogLevel *log_level_ptr; | |
5260325f | 652 | ServerOpCodes opcode; |
3867aa0a | 653 | u_short port; |
d231781a | 654 | u_int i, flags = 0; |
d66ce1a1 | 655 | size_t len; |
5260325f | 656 | |
2717fa0f | 657 | cp = line; |
0f8cd5a6 | 658 | if ((arg = strdelim(&cp)) == NULL) |
88299971 | 659 | return 0; |
2717fa0f | 660 | /* Ignore leading whitespace */ |
661 | if (*arg == '\0') | |
704b1659 | 662 | arg = strdelim(&cp); |
2717fa0f | 663 | if (!arg || !*arg || *arg == '#') |
664 | return 0; | |
665 | intptr = NULL; | |
666 | charptr = NULL; | |
d231781a | 667 | opcode = parse_token(arg, filename, linenum, &flags); |
668 | ||
669 | if (activep == NULL) { /* We are processing a command line directive */ | |
670 | cmdline = 1; | |
671 | activep = &cmdline; | |
672 | } | |
673 | if (*activep && opcode != sMatch) | |
674 | debug3("%s:%d setting %s %s", filename, linenum, arg, cp); | |
675 | if (*activep == 0 && !(flags & SSHCFG_MATCH)) { | |
676 | if (user == NULL) { | |
677 | fatal("%s line %d: Directive '%s' is not allowed " | |
678 | "within a Match block", filename, linenum, arg); | |
679 | } else { /* this is a directive we have already processed */ | |
680 | while (arg) | |
681 | arg = strdelim(&cp); | |
682 | return 0; | |
683 | } | |
684 | } | |
685 | ||
2717fa0f | 686 | switch (opcode) { |
687 | /* Portable-specific options */ | |
7fceb20d | 688 | case sUsePAM: |
689 | intptr = &options->use_pam; | |
2717fa0f | 690 | goto parse_flag; |
48e671d5 | 691 | |
2717fa0f | 692 | /* Standard Options */ |
693 | case sBadOption: | |
694 | return -1; | |
695 | case sPort: | |
696 | /* ignore ports from configfile if cmdline specifies ports */ | |
697 | if (options->ports_from_cmdline) | |
698 | return 0; | |
699 | if (options->listen_addrs != NULL) | |
700 | fatal("%s line %d: ports must be specified before " | |
3a454b6a | 701 | "ListenAddress.", filename, linenum); |
2717fa0f | 702 | if (options->num_ports >= MAX_PORTS) |
703 | fatal("%s line %d: too many ports.", | |
704 | filename, linenum); | |
705 | arg = strdelim(&cp); | |
706 | if (!arg || *arg == '\0') | |
707 | fatal("%s line %d: missing port number.", | |
708 | filename, linenum); | |
709 | options->ports[options->num_ports++] = a2port(arg); | |
710 | if (options->ports[options->num_ports-1] == 0) | |
711 | fatal("%s line %d: Badly formatted port number.", | |
712 | filename, linenum); | |
713 | break; | |
714 | ||
715 | case sServerKeyBits: | |
716 | intptr = &options->server_key_bits; | |
c6dca55e | 717 | parse_int: |
2717fa0f | 718 | arg = strdelim(&cp); |
719 | if (!arg || *arg == '\0') | |
720 | fatal("%s line %d: missing integer value.", | |
721 | filename, linenum); | |
722 | value = atoi(arg); | |
d231781a | 723 | if (*activep && *intptr == -1) |
2717fa0f | 724 | *intptr = value; |
725 | break; | |
726 | ||
727 | case sLoginGraceTime: | |
728 | intptr = &options->login_grace_time; | |
c6dca55e | 729 | parse_time: |
2717fa0f | 730 | arg = strdelim(&cp); |
731 | if (!arg || *arg == '\0') | |
732 | fatal("%s line %d: missing time value.", | |
733 | filename, linenum); | |
734 | if ((value = convtime(arg)) == -1) | |
735 | fatal("%s line %d: invalid time value.", | |
736 | filename, linenum); | |
737 | if (*intptr == -1) | |
738 | *intptr = value; | |
739 | break; | |
740 | ||
741 | case sKeyRegenerationTime: | |
742 | intptr = &options->key_regeneration_time; | |
743 | goto parse_time; | |
744 | ||
745 | case sListenAddress: | |
746 | arg = strdelim(&cp); | |
3867aa0a | 747 | if (arg == NULL || *arg == '\0') |
748 | fatal("%s line %d: missing address", | |
2717fa0f | 749 | filename, linenum); |
91135a0e | 750 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ |
751 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL | |
752 | && strchr(p+1, ':') != NULL) { | |
753 | add_listen_addr(options, arg, 0); | |
754 | break; | |
755 | } | |
3867aa0a | 756 | p = hpdelim(&arg); |
757 | if (p == NULL) | |
758 | fatal("%s line %d: bad address:port usage", | |
2717fa0f | 759 | filename, linenum); |
3867aa0a | 760 | p = cleanhostname(p); |
761 | if (arg == NULL) | |
762 | port = 0; | |
763 | else if ((port = a2port(arg)) == 0) | |
764 | fatal("%s line %d: bad port number", filename, linenum); | |
765 | ||
766 | add_listen_addr(options, p, port); | |
767 | ||
2717fa0f | 768 | break; |
769 | ||
31b41ceb | 770 | case sAddressFamily: |
771 | arg = strdelim(&cp); | |
38634ff6 | 772 | if (!arg || *arg == '\0') |
773 | fatal("%s line %d: missing address family.", | |
774 | filename, linenum); | |
31b41ceb | 775 | intptr = &options->address_family; |
776 | if (options->listen_addrs != NULL) | |
777 | fatal("%s line %d: address family must be specified before " | |
778 | "ListenAddress.", filename, linenum); | |
779 | if (strcasecmp(arg, "inet") == 0) | |
780 | value = AF_INET; | |
781 | else if (strcasecmp(arg, "inet6") == 0) | |
782 | value = AF_INET6; | |
783 | else if (strcasecmp(arg, "any") == 0) | |
784 | value = AF_UNSPEC; | |
785 | else | |
786 | fatal("%s line %d: unsupported address family \"%s\".", | |
787 | filename, linenum, arg); | |
788 | if (*intptr == -1) | |
789 | *intptr = value; | |
790 | break; | |
791 | ||
2717fa0f | 792 | case sHostKeyFile: |
793 | intptr = &options->num_host_key_files; | |
794 | if (*intptr >= MAX_HOSTKEYS) | |
795 | fatal("%s line %d: too many host keys specified (max %d).", | |
796 | filename, linenum, MAX_HOSTKEYS); | |
797 | charptr = &options->host_key_files[*intptr]; | |
c6dca55e | 798 | parse_filename: |
2717fa0f | 799 | arg = strdelim(&cp); |
800 | if (!arg || *arg == '\0') | |
801 | fatal("%s line %d: missing file name.", | |
802 | filename, linenum); | |
d231781a | 803 | if (*activep && *charptr == NULL) { |
2717fa0f | 804 | *charptr = tilde_expand_filename(arg, getuid()); |
805 | /* increase optional counter */ | |
806 | if (intptr != NULL) | |
807 | *intptr = *intptr + 1; | |
808 | } | |
809 | break; | |
0fbe8c74 | 810 | |
2717fa0f | 811 | case sPidFile: |
812 | charptr = &options->pid_file; | |
813 | goto parse_filename; | |
5260325f | 814 | |
2717fa0f | 815 | case sPermitRootLogin: |
816 | intptr = &options->permit_root_login; | |
817 | arg = strdelim(&cp); | |
818 | if (!arg || *arg == '\0') | |
819 | fatal("%s line %d: missing yes/" | |
820 | "without-password/forced-commands-only/no " | |
821 | "argument.", filename, linenum); | |
822 | value = 0; /* silence compiler */ | |
823 | if (strcmp(arg, "without-password") == 0) | |
824 | value = PERMIT_NO_PASSWD; | |
825 | else if (strcmp(arg, "forced-commands-only") == 0) | |
826 | value = PERMIT_FORCED_ONLY; | |
827 | else if (strcmp(arg, "yes") == 0) | |
828 | value = PERMIT_YES; | |
829 | else if (strcmp(arg, "no") == 0) | |
830 | value = PERMIT_NO; | |
831 | else | |
832 | fatal("%s line %d: Bad yes/" | |
833 | "without-password/forced-commands-only/no " | |
834 | "argument: %s", filename, linenum, arg); | |
2ef741a3 | 835 | if (*activep && *intptr == -1) |
2717fa0f | 836 | *intptr = value; |
837 | break; | |
838 | ||
839 | case sIgnoreRhosts: | |
840 | intptr = &options->ignore_rhosts; | |
c6dca55e | 841 | parse_flag: |
2717fa0f | 842 | arg = strdelim(&cp); |
843 | if (!arg || *arg == '\0') | |
844 | fatal("%s line %d: missing yes/no argument.", | |
845 | filename, linenum); | |
846 | value = 0; /* silence compiler */ | |
847 | if (strcmp(arg, "yes") == 0) | |
848 | value = 1; | |
849 | else if (strcmp(arg, "no") == 0) | |
850 | value = 0; | |
851 | else | |
852 | fatal("%s line %d: Bad yes/no argument: %s", | |
853 | filename, linenum, arg); | |
d231781a | 854 | if (*activep && *intptr == -1) |
2717fa0f | 855 | *intptr = value; |
856 | break; | |
857 | ||
858 | case sIgnoreUserKnownHosts: | |
859 | intptr = &options->ignore_user_known_hosts; | |
860 | goto parse_flag; | |
861 | ||
2717fa0f | 862 | case sRhostsRSAAuthentication: |
863 | intptr = &options->rhosts_rsa_authentication; | |
864 | goto parse_flag; | |
865 | ||
866 | case sHostbasedAuthentication: | |
867 | intptr = &options->hostbased_authentication; | |
868 | goto parse_flag; | |
869 | ||
870 | case sHostbasedUsesNameFromPacketOnly: | |
871 | intptr = &options->hostbased_uses_name_from_packet_only; | |
872 | goto parse_flag; | |
873 | ||
874 | case sRSAAuthentication: | |
875 | intptr = &options->rsa_authentication; | |
876 | goto parse_flag; | |
877 | ||
878 | case sPubkeyAuthentication: | |
879 | intptr = &options->pubkey_authentication; | |
880 | goto parse_flag; | |
d0ec7f42 | 881 | |
2717fa0f | 882 | case sKerberosAuthentication: |
883 | intptr = &options->kerberos_authentication; | |
884 | goto parse_flag; | |
5260325f | 885 | |
2717fa0f | 886 | case sKerberosOrLocalPasswd: |
887 | intptr = &options->kerberos_or_local_passwd; | |
888 | goto parse_flag; | |
5260325f | 889 | |
2717fa0f | 890 | case sKerberosTicketCleanup: |
891 | intptr = &options->kerberos_ticket_cleanup; | |
892 | goto parse_flag; | |
d0ec7f42 | 893 | |
a1e30b47 | 894 | case sKerberosGetAFSToken: |
895 | intptr = &options->kerberos_get_afs_token; | |
896 | goto parse_flag; | |
897 | ||
7364bd04 | 898 | case sGssAuthentication: |
899 | intptr = &options->gss_authentication; | |
900 | goto parse_flag; | |
901 | ||
902 | case sGssCleanupCreds: | |
903 | intptr = &options->gss_cleanup_creds; | |
904 | goto parse_flag; | |
905 | ||
2717fa0f | 906 | case sPasswordAuthentication: |
907 | intptr = &options->password_authentication; | |
908 | goto parse_flag; | |
5260325f | 909 | |
2717fa0f | 910 | case sKbdInteractiveAuthentication: |
911 | intptr = &options->kbd_interactive_authentication; | |
912 | goto parse_flag; | |
8002af61 | 913 | |
2717fa0f | 914 | case sChallengeResponseAuthentication: |
915 | intptr = &options->challenge_response_authentication; | |
916 | goto parse_flag; | |
8002af61 | 917 | |
2717fa0f | 918 | case sPrintMotd: |
919 | intptr = &options->print_motd; | |
920 | goto parse_flag; | |
5260325f | 921 | |
2717fa0f | 922 | case sPrintLastLog: |
923 | intptr = &options->print_lastlog; | |
924 | goto parse_flag; | |
5260325f | 925 | |
2717fa0f | 926 | case sX11Forwarding: |
927 | intptr = &options->x11_forwarding; | |
928 | goto parse_flag; | |
5260325f | 929 | |
2717fa0f | 930 | case sX11DisplayOffset: |
931 | intptr = &options->x11_display_offset; | |
932 | goto parse_int; | |
8efc0c15 | 933 | |
e6e573bd | 934 | case sX11UseLocalhost: |
935 | intptr = &options->x11_use_localhost; | |
936 | goto parse_flag; | |
937 | ||
2717fa0f | 938 | case sXAuthLocation: |
939 | charptr = &options->xauth_location; | |
940 | goto parse_filename; | |
5260325f | 941 | |
2717fa0f | 942 | case sStrictModes: |
943 | intptr = &options->strict_modes; | |
944 | goto parse_flag; | |
5260325f | 945 | |
fd573618 | 946 | case sTCPKeepAlive: |
947 | intptr = &options->tcp_keep_alive; | |
2717fa0f | 948 | goto parse_flag; |
33de75a3 | 949 | |
2717fa0f | 950 | case sEmptyPasswd: |
951 | intptr = &options->permit_empty_passwd; | |
952 | goto parse_flag; | |
5260325f | 953 | |
f00bab84 | 954 | case sPermitUserEnvironment: |
955 | intptr = &options->permit_user_env; | |
956 | goto parse_flag; | |
957 | ||
2717fa0f | 958 | case sUseLogin: |
959 | intptr = &options->use_login; | |
960 | goto parse_flag; | |
5260325f | 961 | |
636f76ca | 962 | case sCompression: |
963 | intptr = &options->compression; | |
07200973 | 964 | arg = strdelim(&cp); |
965 | if (!arg || *arg == '\0') | |
966 | fatal("%s line %d: missing yes/no/delayed " | |
967 | "argument.", filename, linenum); | |
968 | value = 0; /* silence compiler */ | |
969 | if (strcmp(arg, "delayed") == 0) | |
970 | value = COMP_DELAYED; | |
971 | else if (strcmp(arg, "yes") == 0) | |
972 | value = COMP_ZLIB; | |
973 | else if (strcmp(arg, "no") == 0) | |
974 | value = COMP_NONE; | |
975 | else | |
976 | fatal("%s line %d: Bad yes/no/delayed " | |
977 | "argument: %s", filename, linenum, arg); | |
978 | if (*intptr == -1) | |
979 | *intptr = value; | |
980 | break; | |
636f76ca | 981 | |
2717fa0f | 982 | case sGatewayPorts: |
983 | intptr = &options->gateway_ports; | |
3867aa0a | 984 | arg = strdelim(&cp); |
985 | if (!arg || *arg == '\0') | |
986 | fatal("%s line %d: missing yes/no/clientspecified " | |
987 | "argument.", filename, linenum); | |
988 | value = 0; /* silence compiler */ | |
989 | if (strcmp(arg, "clientspecified") == 0) | |
990 | value = 2; | |
991 | else if (strcmp(arg, "yes") == 0) | |
992 | value = 1; | |
993 | else if (strcmp(arg, "no") == 0) | |
994 | value = 0; | |
995 | else | |
996 | fatal("%s line %d: Bad yes/no/clientspecified " | |
997 | "argument: %s", filename, linenum, arg); | |
f3e3d6ce | 998 | if (*activep && *intptr == -1) |
3867aa0a | 999 | *intptr = value; |
1000 | break; | |
5260325f | 1001 | |
c5a7d788 | 1002 | case sUseDNS: |
1003 | intptr = &options->use_dns; | |
2717fa0f | 1004 | goto parse_flag; |
5260325f | 1005 | |
2717fa0f | 1006 | case sLogFacility: |
2a72bc03 | 1007 | log_facility_ptr = &options->log_facility; |
2717fa0f | 1008 | arg = strdelim(&cp); |
1009 | value = log_facility_number(arg); | |
5eaf8578 | 1010 | if (value == SYSLOG_FACILITY_NOT_SET) |
2717fa0f | 1011 | fatal("%.200s line %d: unsupported log facility '%s'", |
1012 | filename, linenum, arg ? arg : "<NONE>"); | |
2a72bc03 | 1013 | if (*log_facility_ptr == -1) |
1014 | *log_facility_ptr = (SyslogFacility) value; | |
2717fa0f | 1015 | break; |
1016 | ||
1017 | case sLogLevel: | |
2a72bc03 | 1018 | log_level_ptr = &options->log_level; |
2717fa0f | 1019 | arg = strdelim(&cp); |
1020 | value = log_level_number(arg); | |
5eaf8578 | 1021 | if (value == SYSLOG_LEVEL_NOT_SET) |
2717fa0f | 1022 | fatal("%.200s line %d: unsupported log level '%s'", |
1023 | filename, linenum, arg ? arg : "<NONE>"); | |
2a72bc03 | 1024 | if (*log_level_ptr == -1) |
1025 | *log_level_ptr = (LogLevel) value; | |
2717fa0f | 1026 | break; |
1027 | ||
1028 | case sAllowTcpForwarding: | |
1029 | intptr = &options->allow_tcp_forwarding; | |
1030 | goto parse_flag; | |
1031 | ||
43c3f85c | 1032 | case sAllowAgentForwarding: |
1033 | intptr = &options->allow_agent_forwarding; | |
1034 | goto parse_flag; | |
1035 | ||
1853d1ef | 1036 | case sUsePrivilegeSeparation: |
1037 | intptr = &use_privsep; | |
1038 | goto parse_flag; | |
1039 | ||
2717fa0f | 1040 | case sAllowUsers: |
1041 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1042 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
1043 | fatal("%s line %d: too many allow users.", | |
1044 | filename, linenum); | |
7528d467 | 1045 | options->allow_users[options->num_allow_users++] = |
1046 | xstrdup(arg); | |
2717fa0f | 1047 | } |
1048 | break; | |
a8be9f80 | 1049 | |
2717fa0f | 1050 | case sDenyUsers: |
1051 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1052 | if (options->num_deny_users >= MAX_DENY_USERS) | |
d4f40d92 | 1053 | fatal("%s line %d: too many deny users.", |
2717fa0f | 1054 | filename, linenum); |
7528d467 | 1055 | options->deny_users[options->num_deny_users++] = |
1056 | xstrdup(arg); | |
2717fa0f | 1057 | } |
1058 | break; | |
b2552997 | 1059 | |
2717fa0f | 1060 | case sAllowGroups: |
1061 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1062 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
1063 | fatal("%s line %d: too many allow groups.", | |
1064 | filename, linenum); | |
7528d467 | 1065 | options->allow_groups[options->num_allow_groups++] = |
1066 | xstrdup(arg); | |
2717fa0f | 1067 | } |
1068 | break; | |
a8be9f80 | 1069 | |
2717fa0f | 1070 | case sDenyGroups: |
1071 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1072 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
1073 | fatal("%s line %d: too many deny groups.", | |
1074 | filename, linenum); | |
1075 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
1076 | } | |
1077 | break; | |
38c295d6 | 1078 | |
2717fa0f | 1079 | case sCiphers: |
1080 | arg = strdelim(&cp); | |
1081 | if (!arg || *arg == '\0') | |
1082 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1083 | if (!ciphers_valid(arg)) | |
1084 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
1085 | filename, linenum, arg ? arg : "<NONE>"); | |
1086 | if (options->ciphers == NULL) | |
1087 | options->ciphers = xstrdup(arg); | |
1088 | break; | |
1089 | ||
1090 | case sMacs: | |
1091 | arg = strdelim(&cp); | |
1092 | if (!arg || *arg == '\0') | |
1093 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1094 | if (!mac_valid(arg)) | |
1095 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
1096 | filename, linenum, arg ? arg : "<NONE>"); | |
1097 | if (options->macs == NULL) | |
1098 | options->macs = xstrdup(arg); | |
1099 | break; | |
1100 | ||
1101 | case sProtocol: | |
1102 | intptr = &options->protocol; | |
1103 | arg = strdelim(&cp); | |
1104 | if (!arg || *arg == '\0') | |
1105 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1106 | value = proto_spec(arg); | |
1107 | if (value == SSH_PROTO_UNKNOWN) | |
1108 | fatal("%s line %d: Bad protocol spec '%s'.", | |
184eed6a | 1109 | filename, linenum, arg ? arg : "<NONE>"); |
2717fa0f | 1110 | if (*intptr == SSH_PROTO_UNKNOWN) |
1111 | *intptr = value; | |
1112 | break; | |
1113 | ||
1114 | case sSubsystem: | |
1115 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
1116 | fatal("%s line %d: too many subsystems defined.", | |
184eed6a | 1117 | filename, linenum); |
2717fa0f | 1118 | } |
1119 | arg = strdelim(&cp); | |
1120 | if (!arg || *arg == '\0') | |
1121 | fatal("%s line %d: Missing subsystem name.", | |
184eed6a | 1122 | filename, linenum); |
d231781a | 1123 | if (!*activep) { |
1124 | arg = strdelim(&cp); | |
1125 | break; | |
1126 | } | |
2717fa0f | 1127 | for (i = 0; i < options->num_subsystems; i++) |
1128 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
1129 | fatal("%s line %d: Subsystem '%s' already defined.", | |
184eed6a | 1130 | filename, linenum, arg); |
2717fa0f | 1131 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); |
1132 | arg = strdelim(&cp); | |
1133 | if (!arg || *arg == '\0') | |
1134 | fatal("%s line %d: Missing subsystem command.", | |
184eed6a | 1135 | filename, linenum); |
2717fa0f | 1136 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); |
d66ce1a1 | 1137 | |
1138 | /* Collect arguments (separate to executable) */ | |
1139 | p = xstrdup(arg); | |
1140 | len = strlen(p) + 1; | |
1141 | while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
1142 | len += 1 + strlen(arg); | |
1143 | p = xrealloc(p, 1, len); | |
1144 | strlcat(p, " ", len); | |
1145 | strlcat(p, arg, len); | |
1146 | } | |
1147 | options->subsystem_args[options->num_subsystems] = p; | |
2717fa0f | 1148 | options->num_subsystems++; |
1149 | break; | |
1150 | ||
1151 | case sMaxStartups: | |
1152 | arg = strdelim(&cp); | |
1153 | if (!arg || *arg == '\0') | |
1154 | fatal("%s line %d: Missing MaxStartups spec.", | |
184eed6a | 1155 | filename, linenum); |
2717fa0f | 1156 | if ((n = sscanf(arg, "%d:%d:%d", |
1157 | &options->max_startups_begin, | |
1158 | &options->max_startups_rate, | |
1159 | &options->max_startups)) == 3) { | |
1160 | if (options->max_startups_begin > | |
1161 | options->max_startups || | |
1162 | options->max_startups_rate > 100 || | |
1163 | options->max_startups_rate < 1) | |
c345cf9d | 1164 | fatal("%s line %d: Illegal MaxStartups spec.", |
97de229c | 1165 | filename, linenum); |
2717fa0f | 1166 | } else if (n != 1) |
1167 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1168 | filename, linenum); | |
1169 | else | |
1170 | options->max_startups = options->max_startups_begin; | |
1171 | break; | |
1172 | ||
af4bd935 | 1173 | case sMaxAuthTries: |
1174 | intptr = &options->max_authtries; | |
1175 | goto parse_int; | |
1176 | ||
c6dca55e | 1177 | case sMaxSessions: |
1178 | intptr = &options->max_sessions; | |
1179 | goto parse_int; | |
1180 | ||
2717fa0f | 1181 | case sBanner: |
1182 | charptr = &options->banner; | |
1183 | goto parse_filename; | |
db49deeb | 1184 | |
2717fa0f | 1185 | /* |
1186 | * These options can contain %X options expanded at | |
1187 | * connect time, so that you can specify paths like: | |
1188 | * | |
1189 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
1190 | */ | |
1191 | case sAuthorizedKeysFile: | |
1192 | case sAuthorizedKeysFile2: | |
d4f40d92 | 1193 | charptr = (opcode == sAuthorizedKeysFile) ? |
2717fa0f | 1194 | &options->authorized_keys_file : |
1195 | &options->authorized_keys_file2; | |
1196 | goto parse_filename; | |
1197 | ||
1198 | case sClientAliveInterval: | |
1199 | intptr = &options->client_alive_interval; | |
1200 | goto parse_time; | |
1201 | ||
1202 | case sClientAliveCountMax: | |
1203 | intptr = &options->client_alive_count_max; | |
1204 | goto parse_int; | |
1205 | ||
61a2c1da | 1206 | case sAcceptEnv: |
1207 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1208 | if (strchr(arg, '=') != NULL) | |
1209 | fatal("%s line %d: Invalid environment name.", | |
1210 | filename, linenum); | |
1211 | if (options->num_accept_env >= MAX_ACCEPT_ENV) | |
1212 | fatal("%s line %d: too many allow env.", | |
1213 | filename, linenum); | |
d231781a | 1214 | if (!*activep) |
1215 | break; | |
61a2c1da | 1216 | options->accept_env[options->num_accept_env++] = |
1217 | xstrdup(arg); | |
1218 | } | |
1219 | break; | |
1220 | ||
d20f3c9e | 1221 | case sPermitTunnel: |
1222 | intptr = &options->permit_tun; | |
a4f24bf8 | 1223 | arg = strdelim(&cp); |
1224 | if (!arg || *arg == '\0') | |
1225 | fatal("%s line %d: Missing yes/point-to-point/" | |
1226 | "ethernet/no argument.", filename, linenum); | |
1760c982 | 1227 | value = -1; |
1228 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1229 | if (strcmp(tunmode_desc[i].text, arg) == 0) { | |
1230 | value = tunmode_desc[i].val; | |
1231 | break; | |
1232 | } | |
1233 | if (value == -1) | |
a4f24bf8 | 1234 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" |
1235 | "no argument: %s", filename, linenum, arg); | |
1236 | if (*intptr == -1) | |
1237 | *intptr = value; | |
1238 | break; | |
d20f3c9e | 1239 | |
d231781a | 1240 | case sMatch: |
1241 | if (cmdline) | |
1242 | fatal("Match directive not supported as a command-line " | |
1243 | "option"); | |
1244 | value = match_cfg_line(&cp, linenum, user, host, address); | |
1245 | if (value < 0) | |
1246 | fatal("%s line %d: Bad Match condition", filename, | |
1247 | linenum); | |
1248 | *activep = value; | |
1249 | break; | |
1250 | ||
2fefbadf | 1251 | case sPermitOpen: |
1252 | arg = strdelim(&cp); | |
1253 | if (!arg || *arg == '\0') | |
1254 | fatal("%s line %d: missing PermitOpen specification", | |
1255 | filename, linenum); | |
38757197 | 1256 | n = options->num_permitted_opens; /* modified later */ |
2fefbadf | 1257 | if (strcmp(arg, "any") == 0) { |
38757197 | 1258 | if (*activep && n == -1) { |
2fefbadf | 1259 | channel_clear_adm_permitted_opens(); |
ea46e550 | 1260 | options->num_permitted_opens = 0; |
1261 | } | |
2fefbadf | 1262 | break; |
1263 | } | |
75b6d52c | 1264 | if (*activep && n == -1) |
1265 | channel_clear_adm_permitted_opens(); | |
ea46e550 | 1266 | for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { |
1267 | p = hpdelim(&arg); | |
1268 | if (p == NULL) | |
1269 | fatal("%s line %d: missing host in PermitOpen", | |
1270 | filename, linenum); | |
1271 | p = cleanhostname(p); | |
1272 | if (arg == NULL || (port = a2port(arg)) == 0) | |
1273 | fatal("%s line %d: bad port number in " | |
1274 | "PermitOpen", filename, linenum); | |
75b6d52c | 1275 | if (*activep && n == -1) |
ea46e550 | 1276 | options->num_permitted_opens = |
1277 | channel_add_adm_permitted_opens(p, port); | |
ea46e550 | 1278 | } |
2fefbadf | 1279 | break; |
1280 | ||
e7259e8d | 1281 | case sForceCommand: |
1282 | if (cp == NULL) | |
1283 | fatal("%.200s line %d: Missing argument.", filename, | |
1284 | linenum); | |
1285 | len = strspn(cp, WHITESPACE); | |
1286 | if (*activep && options->adm_forced_command == NULL) | |
1287 | options->adm_forced_command = xstrdup(cp + len); | |
1288 | return 0; | |
1289 | ||
db49deeb | 1290 | case sChrootDirectory: |
1291 | charptr = &options->chroot_directory; | |
c5bf32e6 | 1292 | |
1293 | arg = strdelim(&cp); | |
1294 | if (!arg || *arg == '\0') | |
1295 | fatal("%s line %d: missing file name.", | |
1296 | filename, linenum); | |
1297 | if (*activep && *charptr == NULL) | |
1298 | *charptr = xstrdup(arg); | |
1299 | break; | |
db49deeb | 1300 | |
2717fa0f | 1301 | case sDeprecated: |
bbe88b6d | 1302 | logit("%s line %d: Deprecated option %s", |
2717fa0f | 1303 | filename, linenum, arg); |
1304 | while (arg) | |
1305 | arg = strdelim(&cp); | |
1306 | break; | |
1307 | ||
a2144546 | 1308 | case sUnsupported: |
1309 | logit("%s line %d: Unsupported option %s", | |
1310 | filename, linenum, arg); | |
1311 | while (arg) | |
1312 | arg = strdelim(&cp); | |
1313 | break; | |
1314 | ||
2717fa0f | 1315 | default: |
1316 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
1317 | filename, linenum, arg, opcode); | |
1318 | } | |
1319 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
1320 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
1321 | filename, linenum, arg); | |
1322 | return 0; | |
1323 | } | |
089fbbd2 | 1324 | |
2717fa0f | 1325 | /* Reads the server configuration file. */ |
5c53a31e | 1326 | |
2717fa0f | 1327 | void |
b9a549d7 | 1328 | load_server_config(const char *filename, Buffer *conf) |
2717fa0f | 1329 | { |
b9a549d7 | 1330 | char line[1024], *cp; |
7528d467 | 1331 | FILE *f; |
2717fa0f | 1332 | |
b9a549d7 | 1333 | debug2("%s: filename %s", __func__, filename); |
1334 | if ((f = fopen(filename, "r")) == NULL) { | |
2717fa0f | 1335 | perror(filename); |
1336 | exit(1); | |
1337 | } | |
b9a549d7 | 1338 | buffer_clear(conf); |
2717fa0f | 1339 | while (fgets(line, sizeof(line), f)) { |
b9a549d7 | 1340 | /* |
1341 | * Trim out comments and strip whitespace | |
f2107e97 | 1342 | * NB - preserve newlines, they are needed to reproduce |
b9a549d7 | 1343 | * line numbers later for error messages |
1344 | */ | |
1345 | if ((cp = strchr(line, '#')) != NULL) | |
1346 | memcpy(cp, "\n", 2); | |
1347 | cp = line + strspn(line, " \t\r"); | |
1348 | ||
1349 | buffer_append(conf, cp, strlen(cp)); | |
8efc0c15 | 1350 | } |
b9a549d7 | 1351 | buffer_append(conf, "\0", 1); |
5260325f | 1352 | fclose(f); |
b9a549d7 | 1353 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); |
1354 | } | |
1355 | ||
1356 | void | |
d231781a | 1357 | parse_server_match_config(ServerOptions *options, const char *user, |
1358 | const char *host, const char *address) | |
1359 | { | |
1360 | ServerOptions mo; | |
1361 | ||
1362 | initialize_server_options(&mo); | |
1363 | parse_server_config(&mo, "reprocess config", &cfg, user, host, address); | |
03bcbf84 | 1364 | copy_set_server_options(options, &mo, 0); |
d231781a | 1365 | } |
1366 | ||
03bcbf84 | 1367 | /* Helper macros */ |
1368 | #define M_CP_INTOPT(n) do {\ | |
1369 | if (src->n != -1) \ | |
1370 | dst->n = src->n; \ | |
1371 | } while (0) | |
1372 | #define M_CP_STROPT(n) do {\ | |
1373 | if (src->n != NULL) { \ | |
1374 | if (dst->n != NULL) \ | |
1375 | xfree(dst->n); \ | |
1376 | dst->n = src->n; \ | |
1377 | } \ | |
1378 | } while(0) | |
1379 | ||
1380 | /* | |
1381 | * Copy any supported values that are set. | |
1382 | * | |
1383 | * If the preauth flag is set, we do not bother copying the the string or | |
1384 | * array values that are not used pre-authentication, because any that we | |
1385 | * do use must be explictly sent in mm_getpwnamallow(). | |
1386 | */ | |
d231781a | 1387 | void |
03bcbf84 | 1388 | copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) |
d231781a | 1389 | { |
03bcbf84 | 1390 | M_CP_INTOPT(password_authentication); |
1391 | M_CP_INTOPT(gss_authentication); | |
1392 | M_CP_INTOPT(rsa_authentication); | |
1393 | M_CP_INTOPT(pubkey_authentication); | |
1394 | M_CP_INTOPT(kerberos_authentication); | |
1395 | M_CP_INTOPT(hostbased_authentication); | |
1396 | M_CP_INTOPT(kbd_interactive_authentication); | |
2ef741a3 | 1397 | M_CP_INTOPT(permit_root_login); |
03bcbf84 | 1398 | |
1399 | M_CP_INTOPT(allow_tcp_forwarding); | |
43c3f85c | 1400 | M_CP_INTOPT(allow_agent_forwarding); |
03bcbf84 | 1401 | M_CP_INTOPT(gateway_ports); |
1402 | M_CP_INTOPT(x11_display_offset); | |
1403 | M_CP_INTOPT(x11_forwarding); | |
1404 | M_CP_INTOPT(x11_use_localhost); | |
c6dca55e | 1405 | M_CP_INTOPT(max_sessions); |
8086aeb2 | 1406 | M_CP_INTOPT(max_authtries); |
03bcbf84 | 1407 | |
1408 | M_CP_STROPT(banner); | |
1409 | if (preauth) | |
1410 | return; | |
1411 | M_CP_STROPT(adm_forced_command); | |
db49deeb | 1412 | M_CP_STROPT(chroot_directory); |
d231781a | 1413 | } |
1414 | ||
03bcbf84 | 1415 | #undef M_CP_INTOPT |
1416 | #undef M_CP_STROPT | |
1417 | ||
d231781a | 1418 | void |
1419 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, | |
1420 | const char *user, const char *host, const char *address) | |
b9a549d7 | 1421 | { |
d231781a | 1422 | int active, linenum, bad_options = 0; |
16acb158 | 1423 | char *cp, *obuf, *cbuf; |
b9a549d7 | 1424 | |
1425 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); | |
1426 | ||
16acb158 | 1427 | obuf = cbuf = xstrdup(buffer_ptr(conf)); |
d231781a | 1428 | active = user ? 0 : 1; |
861cc543 | 1429 | linenum = 1; |
f8cc7664 | 1430 | while ((cp = strsep(&cbuf, "\n")) != NULL) { |
b9a549d7 | 1431 | if (process_server_config_line(options, cp, filename, |
d231781a | 1432 | linenum++, &active, user, host, address) != 0) |
b9a549d7 | 1433 | bad_options++; |
1434 | } | |
16acb158 | 1435 | xfree(obuf); |
b7c70970 | 1436 | if (bad_options > 0) |
1437 | fatal("%s: terminating, %d bad configuration options", | |
1438 | filename, bad_options); | |
8efc0c15 | 1439 | } |
1760c982 | 1440 | |
1441 | static const char * | |
1442 | fmt_intarg(ServerOpCodes code, int val) | |
1443 | { | |
1444 | if (code == sAddressFamily) { | |
1445 | switch (val) { | |
1446 | case AF_INET: | |
1447 | return "inet"; | |
1448 | case AF_INET6: | |
1449 | return "inet6"; | |
1450 | case AF_UNSPEC: | |
1451 | return "any"; | |
1452 | default: | |
1453 | return "UNKNOWN"; | |
1454 | } | |
1455 | } | |
1456 | if (code == sPermitRootLogin) { | |
1457 | switch (val) { | |
1458 | case PERMIT_NO_PASSWD: | |
1459 | return "without-passord"; | |
1460 | case PERMIT_FORCED_ONLY: | |
1461 | return "forced-commands-only"; | |
1462 | case PERMIT_YES: | |
1463 | return "yes"; | |
1464 | } | |
1465 | } | |
1466 | if (code == sProtocol) { | |
1467 | switch (val) { | |
1468 | case SSH_PROTO_1: | |
1469 | return "1"; | |
1470 | case SSH_PROTO_2: | |
1471 | return "2"; | |
1472 | case (SSH_PROTO_1|SSH_PROTO_2): | |
1473 | return "2,1"; | |
1474 | default: | |
1475 | return "UNKNOWN"; | |
1476 | } | |
1477 | } | |
1478 | if (code == sGatewayPorts && val == 2) | |
1479 | return "clientspecified"; | |
1480 | if (code == sCompression && val == COMP_DELAYED) | |
1481 | return "delayed"; | |
1482 | switch (val) { | |
1483 | case -1: | |
1484 | return "unset"; | |
1485 | case 0: | |
1486 | return "no"; | |
1487 | case 1: | |
1488 | return "yes"; | |
1489 | } | |
1490 | return "UNKNOWN"; | |
1491 | } | |
1492 | ||
1493 | static const char * | |
1494 | lookup_opcode_name(ServerOpCodes code) | |
1495 | { | |
1496 | u_int i; | |
1497 | ||
1498 | for (i = 0; keywords[i].name != NULL; i++) | |
1499 | if (keywords[i].opcode == code) | |
1500 | return(keywords[i].name); | |
1501 | return "UNKNOWN"; | |
1502 | } | |
1503 | ||
1504 | static void | |
1505 | dump_cfg_int(ServerOpCodes code, int val) | |
1506 | { | |
1507 | printf("%s %d\n", lookup_opcode_name(code), val); | |
1508 | } | |
1509 | ||
1510 | static void | |
1511 | dump_cfg_fmtint(ServerOpCodes code, int val) | |
1512 | { | |
1513 | printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); | |
1514 | } | |
1515 | ||
1516 | static void | |
1517 | dump_cfg_string(ServerOpCodes code, const char *val) | |
1518 | { | |
1519 | if (val == NULL) | |
1520 | return; | |
1521 | printf("%s %s\n", lookup_opcode_name(code), val); | |
1522 | } | |
1523 | ||
1524 | static void | |
1525 | dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals) | |
1526 | { | |
1527 | u_int i; | |
1528 | ||
1529 | for (i = 0; i < count; i++) | |
1530 | printf("%s %s\n", lookup_opcode_name(code), vals[i]); | |
1531 | } | |
1532 | ||
1533 | void | |
1534 | dump_config(ServerOptions *o) | |
1535 | { | |
1536 | u_int i; | |
1537 | int ret; | |
1538 | struct addrinfo *ai; | |
1539 | char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL; | |
1540 | ||
1541 | /* these are usually at the top of the config */ | |
1542 | for (i = 0; i < o->num_ports; i++) | |
1543 | printf("port %d\n", o->ports[i]); | |
1544 | dump_cfg_fmtint(sProtocol, o->protocol); | |
1545 | dump_cfg_fmtint(sAddressFamily, o->address_family); | |
1546 | ||
1547 | /* ListenAddress must be after Port */ | |
1548 | for (ai = o->listen_addrs; ai; ai = ai->ai_next) { | |
1549 | if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, | |
1550 | sizeof(addr), port, sizeof(port), | |
1551 | NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { | |
1552 | error("getnameinfo failed: %.100s", | |
1553 | (ret != EAI_SYSTEM) ? gai_strerror(ret) : | |
1554 | strerror(errno)); | |
1555 | } else { | |
1556 | if (ai->ai_family == AF_INET6) | |
1557 | printf("listenaddress [%s]:%s\n", addr, port); | |
1558 | else | |
1559 | printf("listenaddress %s:%s\n", addr, port); | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | /* integer arguments */ | |
1564 | dump_cfg_int(sServerKeyBits, o->server_key_bits); | |
1565 | dump_cfg_int(sLoginGraceTime, o->login_grace_time); | |
1566 | dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time); | |
1567 | dump_cfg_int(sX11DisplayOffset, o->x11_display_offset); | |
1568 | dump_cfg_int(sMaxAuthTries, o->max_authtries); | |
1569 | dump_cfg_int(sClientAliveInterval, o->client_alive_interval); | |
1570 | dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); | |
1571 | ||
1572 | /* formatted integer arguments */ | |
1573 | dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); | |
1574 | dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts); | |
1575 | dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts); | |
1576 | dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication); | |
1577 | dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication); | |
1578 | dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly, | |
1579 | o->hostbased_uses_name_from_packet_only); | |
1580 | dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication); | |
1581 | dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication); | |
1582 | dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication); | |
1583 | dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd); | |
1584 | dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup); | |
1585 | dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token); | |
1586 | dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); | |
1587 | dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); | |
1588 | dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); | |
1589 | dump_cfg_fmtint(sKbdInteractiveAuthentication, | |
1590 | o->kbd_interactive_authentication); | |
1591 | dump_cfg_fmtint(sChallengeResponseAuthentication, | |
1592 | o->challenge_response_authentication); | |
1593 | dump_cfg_fmtint(sPrintMotd, o->print_motd); | |
1594 | dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); | |
1595 | dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); | |
1596 | dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); | |
1597 | dump_cfg_fmtint(sStrictModes, o->strict_modes); | |
1598 | dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); | |
1599 | dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); | |
1600 | dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); | |
1601 | dump_cfg_fmtint(sUseLogin, o->use_login); | |
1602 | dump_cfg_fmtint(sCompression, o->compression); | |
1603 | dump_cfg_fmtint(sGatewayPorts, o->gateway_ports); | |
1604 | dump_cfg_fmtint(sUseDNS, o->use_dns); | |
1605 | dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); | |
1606 | dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep); | |
1607 | ||
1608 | /* string arguments */ | |
1609 | dump_cfg_string(sPidFile, o->pid_file); | |
1610 | dump_cfg_string(sXAuthLocation, o->xauth_location); | |
1611 | dump_cfg_string(sCiphers, o->ciphers); | |
1612 | dump_cfg_string(sMacs, o->macs); | |
1613 | dump_cfg_string(sBanner, o->banner); | |
1614 | dump_cfg_string(sAuthorizedKeysFile, o->authorized_keys_file); | |
1615 | dump_cfg_string(sAuthorizedKeysFile2, o->authorized_keys_file2); | |
1616 | dump_cfg_string(sForceCommand, o->adm_forced_command); | |
1617 | ||
1618 | /* string arguments requiring a lookup */ | |
1619 | dump_cfg_string(sLogLevel, log_level_name(o->log_level)); | |
1620 | dump_cfg_string(sLogFacility, log_facility_name(o->log_facility)); | |
1621 | ||
1622 | /* string array arguments */ | |
1623 | dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, | |
1624 | o->host_key_files); | |
1625 | dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); | |
1626 | dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); | |
1627 | dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); | |
1628 | dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); | |
1629 | dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); | |
1630 | ||
1631 | /* other arguments */ | |
1632 | for (i = 0; i < o->num_subsystems; i++) | |
1633 | printf("subsystem %s %s\n", o->subsystem_name[i], | |
1634 | o->subsystem_args[i]); | |
1635 | ||
1636 | printf("maxstartups %d:%d:%d\n", o->max_startups_begin, | |
1637 | o->max_startups_rate, o->max_startups); | |
1638 | ||
1639 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1640 | if (tunmode_desc[i].val == o->permit_tun) { | |
1641 | s = tunmode_desc[i].text; | |
1642 | break; | |
1643 | } | |
1644 | dump_cfg_string(sPermitTunnel, s); | |
1645 | ||
1646 | printf("permitopen"); | |
1647 | channel_print_adm_permitted_opens(); | |
1648 | printf("\n"); | |
1649 | } |