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22616013 | 1 | /* $OpenBSD: servconf.c,v 1.186 2008/07/04 03:44:59 djm Exp $ */ |
3c0ef626 | 2 | /* |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * | |
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". | |
11 | */ | |
12 | ||
13 | #include "includes.h" | |
3c0ef626 | 14 | |
9108f8d9 | 15 | #include <sys/types.h> |
16 | #include <sys/socket.h> | |
17 | ||
18 | #include <netdb.h> | |
19 | #include <pwd.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <signal.h> | |
24 | #include <unistd.h> | |
25 | #include <stdarg.h> | |
22616013 | 26 | #include <errno.h> |
9108f8d9 | 27 | |
22616013 | 28 | #include "openbsd-compat/sys-queue.h" |
9108f8d9 | 29 | #include "xmalloc.h" |
3c0ef626 | 30 | #include "ssh.h" |
31 | #include "log.h" | |
9108f8d9 | 32 | #include "buffer.h" |
3c0ef626 | 33 | #include "servconf.h" |
3c0ef626 | 34 | #include "compat.h" |
35 | #include "pathnames.h" | |
3c0ef626 | 36 | #include "misc.h" |
37 | #include "cipher.h" | |
9108f8d9 | 38 | #include "key.h" |
3c0ef626 | 39 | #include "kex.h" |
40 | #include "mac.h" | |
9108f8d9 | 41 | #include "match.h" |
42 | #include "channels.h" | |
43 | #include "groupaccess.h" | |
3c0ef626 | 44 | |
45 | static void add_listen_addr(ServerOptions *, char *, u_short); | |
46 | static void add_one_listen_addr(ServerOptions *, char *, u_short); | |
47 | ||
700318f3 | 48 | /* Use of privilege separation or not */ |
49 | extern int use_privsep; | |
9108f8d9 | 50 | extern Buffer cfg; |
3c0ef626 | 51 | |
52 | /* Initializes the server options to their default values. */ | |
53 | ||
54 | void | |
55 | initialize_server_options(ServerOptions *options) | |
56 | { | |
57 | memset(options, 0, sizeof(*options)); | |
58 | ||
59 | /* Portable-specific options */ | |
0fff78ff | 60 | options->use_pam = -1; |
3c0ef626 | 61 | |
62 | /* Standard Options */ | |
63 | options->num_ports = 0; | |
64 | options->ports_from_cmdline = 0; | |
65 | options->listen_addrs = NULL; | |
996d5e62 | 66 | options->address_family = -1; |
3c0ef626 | 67 | options->num_host_key_files = 0; |
68 | options->pid_file = NULL; | |
69 | options->server_key_bits = -1; | |
70 | options->login_grace_time = -1; | |
71 | options->key_regeneration_time = -1; | |
72 | options->permit_root_login = PERMIT_NOT_SET; | |
73 | options->ignore_rhosts = -1; | |
74 | options->ignore_user_known_hosts = -1; | |
75 | options->print_motd = -1; | |
76 | options->print_lastlog = -1; | |
77 | options->x11_forwarding = -1; | |
78 | options->x11_display_offset = -1; | |
e9a17296 | 79 | options->x11_use_localhost = -1; |
3c0ef626 | 80 | options->xauth_location = NULL; |
81 | options->strict_modes = -1; | |
cdd66111 | 82 | options->tcp_keep_alive = -1; |
e9a17296 | 83 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
84 | options->log_level = SYSLOG_LEVEL_NOT_SET; | |
3c0ef626 | 85 | options->rhosts_rsa_authentication = -1; |
86 | options->hostbased_authentication = -1; | |
87 | options->hostbased_uses_name_from_packet_only = -1; | |
88 | options->rsa_authentication = -1; | |
89 | options->pubkey_authentication = -1; | |
3c0ef626 | 90 | options->kerberos_authentication = -1; |
91 | options->kerberos_or_local_passwd = -1; | |
92 | options->kerberos_ticket_cleanup = -1; | |
cdd66111 | 93 | options->kerberos_get_afs_token = -1; |
0fff78ff | 94 | options->gss_authentication=-1; |
95 | options->gss_cleanup_creds = -1; | |
3c0ef626 | 96 | options->password_authentication = -1; |
97 | options->kbd_interactive_authentication = -1; | |
98 | options->challenge_response_authentication = -1; | |
99 | options->permit_empty_passwd = -1; | |
41b2f314 | 100 | options->permit_user_env = -1; |
3c0ef626 | 101 | options->use_login = -1; |
f5799ae1 | 102 | options->compression = -1; |
3c0ef626 | 103 | options->allow_tcp_forwarding = -1; |
22616013 | 104 | options->allow_agent_forwarding = -1; |
3c0ef626 | 105 | options->num_allow_users = 0; |
106 | options->num_deny_users = 0; | |
107 | options->num_allow_groups = 0; | |
108 | options->num_deny_groups = 0; | |
109 | options->ciphers = NULL; | |
110 | options->macs = NULL; | |
111 | options->protocol = SSH_PROTO_UNKNOWN; | |
112 | options->gateway_ports = -1; | |
113 | options->num_subsystems = 0; | |
114 | options->max_startups_begin = -1; | |
115 | options->max_startups_rate = -1; | |
116 | options->max_startups = -1; | |
c9f39d2c | 117 | options->max_authtries = -1; |
22616013 | 118 | options->max_sessions = -1; |
3c0ef626 | 119 | options->banner = NULL; |
0fff78ff | 120 | options->use_dns = -1; |
3c0ef626 | 121 | options->client_alive_interval = -1; |
122 | options->client_alive_count_max = -1; | |
123 | options->authorized_keys_file = NULL; | |
124 | options->authorized_keys_file2 = NULL; | |
c9f39d2c | 125 | options->num_accept_env = 0; |
2c06c99b | 126 | options->permit_tun = -1; |
9108f8d9 | 127 | options->num_permitted_opens = -1; |
128 | options->adm_forced_command = NULL; | |
47686178 | 129 | options->chroot_directory = NULL; |
3c0ef626 | 130 | } |
131 | ||
132 | void | |
133 | fill_default_server_options(ServerOptions *options) | |
134 | { | |
135 | /* Portable-specific options */ | |
0fff78ff | 136 | if (options->use_pam == -1) |
acc3d05e | 137 | options->use_pam = 0; |
3c0ef626 | 138 | |
139 | /* Standard Options */ | |
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) | |
e9a17296 | 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 | } | |
3c0ef626 | 153 | } |
154 | if (options->num_ports == 0) | |
155 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
156 | if (options->listen_addrs == NULL) | |
157 | add_listen_addr(options, NULL, 0); | |
158 | if (options->pid_file == NULL) | |
159 | options->pid_file = _PATH_SSH_DAEMON_PID_FILE; | |
160 | if (options->server_key_bits == -1) | |
22616013 | 161 | options->server_key_bits = 1024; |
3c0ef626 | 162 | if (options->login_grace_time == -1) |
41b2f314 | 163 | options->login_grace_time = 120; |
3c0ef626 | 164 | if (options->key_regeneration_time == -1) |
165 | options->key_regeneration_time = 3600; | |
166 | if (options->permit_root_login == PERMIT_NOT_SET) | |
167 | options->permit_root_login = PERMIT_YES; | |
168 | if (options->ignore_rhosts == -1) | |
169 | options->ignore_rhosts = 1; | |
170 | if (options->ignore_user_known_hosts == -1) | |
171 | options->ignore_user_known_hosts = 0; | |
172 | if (options->print_motd == -1) | |
173 | options->print_motd = 1; | |
174 | if (options->print_lastlog == -1) | |
175 | options->print_lastlog = 1; | |
176 | if (options->x11_forwarding == -1) | |
177 | options->x11_forwarding = 0; | |
178 | if (options->x11_display_offset == -1) | |
179 | options->x11_display_offset = 10; | |
e9a17296 | 180 | if (options->x11_use_localhost == -1) |
181 | options->x11_use_localhost = 1; | |
3c0ef626 | 182 | if (options->xauth_location == NULL) |
183 | options->xauth_location = _PATH_XAUTH; | |
3c0ef626 | 184 | if (options->strict_modes == -1) |
185 | options->strict_modes = 1; | |
cdd66111 | 186 | if (options->tcp_keep_alive == -1) |
187 | options->tcp_keep_alive = 1; | |
e9a17296 | 188 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
3c0ef626 | 189 | options->log_facility = SYSLOG_FACILITY_AUTH; |
e9a17296 | 190 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
3c0ef626 | 191 | options->log_level = SYSLOG_LEVEL_INFO; |
3c0ef626 | 192 | if (options->rhosts_rsa_authentication == -1) |
193 | options->rhosts_rsa_authentication = 0; | |
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; | |
198 | if (options->rsa_authentication == -1) | |
199 | options->rsa_authentication = 1; | |
200 | if (options->pubkey_authentication == -1) | |
201 | options->pubkey_authentication = 1; | |
3c0ef626 | 202 | if (options->kerberos_authentication == -1) |
700318f3 | 203 | options->kerberos_authentication = 0; |
3c0ef626 | 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; | |
cdd66111 | 208 | if (options->kerberos_get_afs_token == -1) |
209 | options->kerberos_get_afs_token = 0; | |
0fff78ff | 210 | if (options->gss_authentication == -1) |
211 | options->gss_authentication = 0; | |
212 | if (options->gss_cleanup_creds == -1) | |
213 | options->gss_cleanup_creds = 1; | |
3c0ef626 | 214 | if (options->password_authentication == -1) |
215 | options->password_authentication = 1; | |
216 | if (options->kbd_interactive_authentication == -1) | |
217 | options->kbd_interactive_authentication = 0; | |
218 | if (options->challenge_response_authentication == -1) | |
219 | options->challenge_response_authentication = 1; | |
220 | if (options->permit_empty_passwd == -1) | |
221 | options->permit_empty_passwd = 0; | |
41b2f314 | 222 | if (options->permit_user_env == -1) |
223 | options->permit_user_env = 0; | |
3c0ef626 | 224 | if (options->use_login == -1) |
225 | options->use_login = 0; | |
f5799ae1 | 226 | if (options->compression == -1) |
665a873d | 227 | options->compression = COMP_DELAYED; |
3c0ef626 | 228 | if (options->allow_tcp_forwarding == -1) |
229 | options->allow_tcp_forwarding = 1; | |
22616013 | 230 | if (options->allow_agent_forwarding == -1) |
231 | options->allow_agent_forwarding = 1; | |
3c0ef626 | 232 | if (options->gateway_ports == -1) |
233 | options->gateway_ports = 0; | |
234 | if (options->max_startups == -1) | |
235 | options->max_startups = 10; | |
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; | |
c9f39d2c | 240 | if (options->max_authtries == -1) |
241 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; | |
22616013 | 242 | if (options->max_sessions == -1) |
243 | options->max_sessions = DEFAULT_SESSIONS_MAX; | |
0fff78ff | 244 | if (options->use_dns == -1) |
245 | options->use_dns = 1; | |
3c0ef626 | 246 | if (options->client_alive_interval == -1) |
e9a17296 | 247 | options->client_alive_interval = 0; |
3c0ef626 | 248 | if (options->client_alive_count_max == -1) |
249 | options->client_alive_count_max = 3; | |
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; | |
2c06c99b | 259 | if (options->permit_tun == -1) |
260 | options->permit_tun = SSH_TUNMODE_NO; | |
700318f3 | 261 | |
f5799ae1 | 262 | /* Turn privilege separation on by default */ |
700318f3 | 263 | if (use_privsep == -1) |
f5799ae1 | 264 | use_privsep = 1; |
265 | ||
41b2f314 | 266 | #ifndef HAVE_MMAP |
f5799ae1 | 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 | ||
3c0ef626 | 275 | } |
276 | ||
277 | /* Keyword tokens. */ | |
278 | typedef enum { | |
279 | sBadOption, /* == unknown option */ | |
280 | /* Portable-specific options */ | |
0fff78ff | 281 | sUsePAM, |
3c0ef626 | 282 | /* Standard Options */ |
283 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, | |
284 | sPermitRootLogin, sLogFacility, sLogLevel, | |
0fff78ff | 285 | sRhostsRSAAuthentication, sRSAAuthentication, |
3c0ef626 | 286 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
cdd66111 | 287 | sKerberosGetAFSToken, |
0fff78ff | 288 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
996d5e62 | 289 | sPasswordAuthentication, sKbdInteractiveAuthentication, |
290 | sListenAddress, sAddressFamily, | |
3c0ef626 | 291 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
e9a17296 | 292 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
cdd66111 | 293 | sStrictModes, sEmptyPasswd, sTCPKeepAlive, |
41b2f314 | 294 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
3c0ef626 | 295 | sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
296 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, | |
c9f39d2c | 297 | sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, |
22616013 | 298 | sMaxStartups, sMaxAuthTries, sMaxSessions, |
0fff78ff | 299 | sBanner, sUseDNS, sHostbasedAuthentication, |
e9a17296 | 300 | sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
3c0ef626 | 301 | sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, |
2c06c99b | 302 | sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel, |
47686178 | 303 | sMatch, sPermitOpen, sForceCommand, sChrootDirectory, |
22616013 | 304 | sUsePrivilegeSeparation, sAllowAgentForwarding, |
0fff78ff | 305 | sDeprecated, sUnsupported |
3c0ef626 | 306 | } ServerOpCodes; |
307 | ||
9108f8d9 | 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 | ||
3c0ef626 | 312 | /* Textual representation of the tokens. */ |
313 | static struct { | |
314 | const char *name; | |
315 | ServerOpCodes opcode; | |
9108f8d9 | 316 | u_int flags; |
3c0ef626 | 317 | } keywords[] = { |
318 | /* Portable-specific options */ | |
0fff78ff | 319 | #ifdef USE_PAM |
9108f8d9 | 320 | { "usepam", sUsePAM, SSHCFG_GLOBAL }, |
0fff78ff | 321 | #else |
9108f8d9 | 322 | { "usepam", sUnsupported, SSHCFG_GLOBAL }, |
0fff78ff | 323 | #endif |
9108f8d9 | 324 | { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL }, |
3c0ef626 | 325 | /* Standard Options */ |
9108f8d9 | 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 }, | |
47686178 | 333 | { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL }, |
9108f8d9 | 334 | { "syslogfacility", sLogFacility, SSHCFG_GLOBAL }, |
335 | { "loglevel", sLogLevel, SSHCFG_GLOBAL }, | |
336 | { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL }, | |
799ae497 | 337 | { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, |
338 | { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, | |
9108f8d9 | 339 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL }, |
799ae497 | 340 | { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, |
341 | { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, | |
9108f8d9 | 342 | { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ |
0fff78ff | 343 | #ifdef KRB5 |
799ae497 | 344 | { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, |
9108f8d9 | 345 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, |
346 | { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, | |
cdd66111 | 347 | #ifdef USE_AFS |
9108f8d9 | 348 | { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, |
cdd66111 | 349 | #else |
9108f8d9 | 350 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, |
cdd66111 | 351 | #endif |
0fff78ff | 352 | #else |
799ae497 | 353 | { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, |
9108f8d9 | 354 | { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, |
355 | { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, | |
356 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, | |
3c0ef626 | 357 | #endif |
9108f8d9 | 358 | { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, |
359 | { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, | |
0fff78ff | 360 | #ifdef GSSAPI |
799ae497 | 361 | { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, |
9108f8d9 | 362 | { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, |
0fff78ff | 363 | #else |
799ae497 | 364 | { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, |
9108f8d9 | 365 | { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, |
3c0ef626 | 366 | #endif |
799ae497 | 367 | { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, |
368 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, | |
9108f8d9 | 369 | { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, |
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 }, | |
378 | { "x11forwarding", sX11Forwarding, SSHCFG_ALL }, | |
379 | { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL }, | |
380 | { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL }, | |
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 }, | |
22616013 | 390 | { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL }, |
9108f8d9 | 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 }, | |
22616013 | 401 | { "maxauthtries", sMaxAuthTries, SSHCFG_ALL }, |
402 | { "maxsessions", sMaxSessions, SSHCFG_ALL }, | |
799ae497 | 403 | { "banner", sBanner, SSHCFG_ALL }, |
9108f8d9 | 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 }, | |
414 | { "match", sMatch, SSHCFG_ALL }, | |
415 | { "permitopen", sPermitOpen, SSHCFG_ALL }, | |
416 | { "forcecommand", sForceCommand, SSHCFG_ALL }, | |
47686178 | 417 | { "chrootdirectory", sChrootDirectory, SSHCFG_ALL }, |
9108f8d9 | 418 | { NULL, sBadOption, 0 } |
3c0ef626 | 419 | }; |
420 | ||
22616013 | 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 | ||
3c0ef626 | 432 | /* |
433 | * Returns the number of the token pointed to by cp or sBadOption. | |
434 | */ | |
435 | ||
436 | static ServerOpCodes | |
437 | parse_token(const char *cp, const char *filename, | |
9108f8d9 | 438 | int linenum, u_int *flags) |
3c0ef626 | 439 | { |
440 | u_int i; | |
441 | ||
442 | for (i = 0; keywords[i].name; i++) | |
9108f8d9 | 443 | if (strcasecmp(cp, keywords[i].name) == 0) { |
444 | *flags = keywords[i].flags; | |
3c0ef626 | 445 | return keywords[i].opcode; |
9108f8d9 | 446 | } |
3c0ef626 | 447 | |
448 | error("%s: line %d: Bad configuration option: %s", | |
449 | filename, linenum, cp); | |
450 | return sBadOption; | |
451 | } | |
452 | ||
453 | static void | |
454 | add_listen_addr(ServerOptions *options, char *addr, u_short port) | |
455 | { | |
665a873d | 456 | u_int i; |
3c0ef626 | 457 | |
458 | if (options->num_ports == 0) | |
459 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; | |
996d5e62 | 460 | if (options->address_family == -1) |
461 | options->address_family = AF_UNSPEC; | |
3c0ef626 | 462 | if (port == 0) |
463 | for (i = 0; i < options->num_ports; i++) | |
464 | add_one_listen_addr(options, addr, options->ports[i]); | |
465 | else | |
466 | add_one_listen_addr(options, addr, port); | |
467 | } | |
468 | ||
469 | static void | |
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)); | |
996d5e62 | 477 | hints.ai_family = options->address_family; |
3c0ef626 | 478 | hints.ai_socktype = SOCK_STREAM; |
479 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; | |
680cee3b | 480 | snprintf(strport, sizeof strport, "%u", port); |
3c0ef626 | 481 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
482 | fatal("bad addr or host: %s (%s)", | |
483 | addr ? addr : "<NULL>", | |
47686178 | 484 | ssh_gai_strerror(gaierr)); |
3c0ef626 | 485 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
486 | ; | |
487 | ai->ai_next = options->listen_addrs; | |
488 | options->listen_addrs = aitop; | |
489 | } | |
490 | ||
9108f8d9 | 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 | ||
524 | static int | |
525 | match_cfg_line_group(const char *grps, int line, const char *user) | |
526 | { | |
527 | int result = 0; | |
9108f8d9 | 528 | struct passwd *pw; |
529 | ||
9108f8d9 | 530 | if (user == NULL) |
531 | goto out; | |
532 | ||
533 | if ((pw = getpwnam(user)) == NULL) { | |
534 | debug("Can't match group at line %d because user %.100s does " | |
535 | "not exist", line, user); | |
536 | } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) { | |
537 | debug("Can't Match group because user %.100s not in any group " | |
538 | "at line %d", user, line); | |
22616013 | 539 | } else if (ga_match_pattern_list(grps) != 1) { |
540 | debug("user %.100s does not match group list %.100s at line %d", | |
541 | user, grps, line); | |
9108f8d9 | 542 | } else { |
22616013 | 543 | debug("user %.100s matched group list %.100s at line %d", user, |
544 | grps, line); | |
9108f8d9 | 545 | result = 1; |
546 | } | |
547 | out: | |
548 | ga_free(); | |
9108f8d9 | 549 | return result; |
550 | } | |
551 | ||
552 | static int | |
553 | match_cfg_line(char **condition, int line, const char *user, const char *host, | |
554 | const char *address) | |
555 | { | |
556 | int result = 1; | |
557 | char *arg, *attrib, *cp = *condition; | |
558 | size_t len; | |
559 | ||
560 | if (user == NULL) | |
561 | debug3("checking syntax for 'Match %s'", cp); | |
562 | else | |
563 | debug3("checking match for '%s' user %s host %s addr %s", cp, | |
564 | user ? user : "(null)", host ? host : "(null)", | |
565 | address ? address : "(null)"); | |
566 | ||
567 | while ((attrib = strdelim(&cp)) && *attrib != '\0') { | |
568 | if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { | |
569 | error("Missing Match criteria for %s", attrib); | |
570 | return -1; | |
571 | } | |
572 | len = strlen(arg); | |
573 | if (strcasecmp(attrib, "user") == 0) { | |
574 | if (!user) { | |
575 | result = 0; | |
576 | continue; | |
577 | } | |
578 | if (match_pattern_list(user, arg, len, 0) != 1) | |
579 | result = 0; | |
580 | else | |
581 | debug("user %.100s matched 'User %.100s' at " | |
582 | "line %d", user, arg, line); | |
583 | } else if (strcasecmp(attrib, "group") == 0) { | |
584 | switch (match_cfg_line_group(arg, line, user)) { | |
585 | case -1: | |
586 | return -1; | |
587 | case 0: | |
588 | result = 0; | |
589 | } | |
590 | } else if (strcasecmp(attrib, "host") == 0) { | |
591 | if (!host) { | |
592 | result = 0; | |
593 | continue; | |
594 | } | |
595 | if (match_hostname(host, arg, len) != 1) | |
596 | result = 0; | |
597 | else | |
598 | debug("connection from %.100s matched 'Host " | |
599 | "%.100s' at line %d", host, arg, line); | |
600 | } else if (strcasecmp(attrib, "address") == 0) { | |
22616013 | 601 | switch (addr_match_list(address, arg)) { |
602 | case 1: | |
9108f8d9 | 603 | debug("connection from %.100s matched 'Address " |
604 | "%.100s' at line %d", address, arg, line); | |
22616013 | 605 | break; |
606 | case 0: | |
607 | case -1: | |
608 | result = 0; | |
609 | break; | |
610 | case -2: | |
611 | return -1; | |
612 | } | |
9108f8d9 | 613 | } else { |
614 | error("Unsupported Match attribute %s", attrib); | |
615 | return -1; | |
616 | } | |
617 | } | |
618 | if (user != NULL) | |
619 | debug3("match %sfound", result ? "" : "not "); | |
620 | *condition = cp; | |
621 | return result; | |
622 | } | |
623 | ||
624 | #define WHITESPACE " \t\r\n" | |
625 | ||
e9a17296 | 626 | int |
627 | process_server_config_line(ServerOptions *options, char *line, | |
9108f8d9 | 628 | const char *filename, int linenum, int *activep, const char *user, |
629 | const char *host, const char *address) | |
3c0ef626 | 630 | { |
3c0ef626 | 631 | char *cp, **charptr, *arg, *p; |
9108f8d9 | 632 | int cmdline = 0, *intptr, value, n; |
47686178 | 633 | SyslogFacility *log_facility_ptr; |
634 | LogLevel *log_level_ptr; | |
3c0ef626 | 635 | ServerOpCodes opcode; |
996d5e62 | 636 | u_short port; |
9108f8d9 | 637 | u_int i, flags = 0; |
638 | size_t len; | |
3c0ef626 | 639 | |
e9a17296 | 640 | cp = line; |
9108f8d9 | 641 | if ((arg = strdelim(&cp)) == NULL) |
642 | return 0; | |
e9a17296 | 643 | /* Ignore leading whitespace */ |
644 | if (*arg == '\0') | |
3c0ef626 | 645 | arg = strdelim(&cp); |
e9a17296 | 646 | if (!arg || !*arg || *arg == '#') |
647 | return 0; | |
648 | intptr = NULL; | |
649 | charptr = NULL; | |
9108f8d9 | 650 | opcode = parse_token(arg, filename, linenum, &flags); |
651 | ||
652 | if (activep == NULL) { /* We are processing a command line directive */ | |
653 | cmdline = 1; | |
654 | activep = &cmdline; | |
655 | } | |
656 | if (*activep && opcode != sMatch) | |
657 | debug3("%s:%d setting %s %s", filename, linenum, arg, cp); | |
658 | if (*activep == 0 && !(flags & SSHCFG_MATCH)) { | |
659 | if (user == NULL) { | |
660 | fatal("%s line %d: Directive '%s' is not allowed " | |
661 | "within a Match block", filename, linenum, arg); | |
662 | } else { /* this is a directive we have already processed */ | |
663 | while (arg) | |
664 | arg = strdelim(&cp); | |
665 | return 0; | |
666 | } | |
667 | } | |
668 | ||
e9a17296 | 669 | switch (opcode) { |
670 | /* Portable-specific options */ | |
0fff78ff | 671 | case sUsePAM: |
672 | intptr = &options->use_pam; | |
e9a17296 | 673 | goto parse_flag; |
3c0ef626 | 674 | |
e9a17296 | 675 | /* Standard Options */ |
676 | case sBadOption: | |
677 | return -1; | |
678 | case sPort: | |
679 | /* ignore ports from configfile if cmdline specifies ports */ | |
680 | if (options->ports_from_cmdline) | |
681 | return 0; | |
682 | if (options->listen_addrs != NULL) | |
683 | fatal("%s line %d: ports must be specified before " | |
684 | "ListenAddress.", filename, linenum); | |
685 | if (options->num_ports >= MAX_PORTS) | |
686 | fatal("%s line %d: too many ports.", | |
687 | filename, linenum); | |
688 | arg = strdelim(&cp); | |
689 | if (!arg || *arg == '\0') | |
690 | fatal("%s line %d: missing port number.", | |
691 | filename, linenum); | |
692 | options->ports[options->num_ports++] = a2port(arg); | |
693 | if (options->ports[options->num_ports-1] == 0) | |
694 | fatal("%s line %d: Badly formatted port number.", | |
695 | filename, linenum); | |
696 | break; | |
697 | ||
698 | case sServerKeyBits: | |
699 | intptr = &options->server_key_bits; | |
22616013 | 700 | parse_int: |
e9a17296 | 701 | arg = strdelim(&cp); |
702 | if (!arg || *arg == '\0') | |
703 | fatal("%s line %d: missing integer value.", | |
704 | filename, linenum); | |
705 | value = atoi(arg); | |
9108f8d9 | 706 | if (*activep && *intptr == -1) |
e9a17296 | 707 | *intptr = value; |
708 | break; | |
709 | ||
710 | case sLoginGraceTime: | |
711 | intptr = &options->login_grace_time; | |
22616013 | 712 | parse_time: |
e9a17296 | 713 | arg = strdelim(&cp); |
714 | if (!arg || *arg == '\0') | |
715 | fatal("%s line %d: missing time value.", | |
716 | filename, linenum); | |
717 | if ((value = convtime(arg)) == -1) | |
718 | fatal("%s line %d: invalid time value.", | |
719 | filename, linenum); | |
720 | if (*intptr == -1) | |
721 | *intptr = value; | |
722 | break; | |
723 | ||
724 | case sKeyRegenerationTime: | |
725 | intptr = &options->key_regeneration_time; | |
726 | goto parse_time; | |
727 | ||
728 | case sListenAddress: | |
729 | arg = strdelim(&cp); | |
996d5e62 | 730 | if (arg == NULL || *arg == '\0') |
731 | fatal("%s line %d: missing address", | |
e9a17296 | 732 | filename, linenum); |
665a873d | 733 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ |
734 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL | |
735 | && strchr(p+1, ':') != NULL) { | |
736 | add_listen_addr(options, arg, 0); | |
737 | break; | |
738 | } | |
996d5e62 | 739 | p = hpdelim(&arg); |
740 | if (p == NULL) | |
741 | fatal("%s line %d: bad address:port usage", | |
e9a17296 | 742 | filename, linenum); |
996d5e62 | 743 | p = cleanhostname(p); |
744 | if (arg == NULL) | |
745 | port = 0; | |
746 | else if ((port = a2port(arg)) == 0) | |
747 | fatal("%s line %d: bad port number", filename, linenum); | |
748 | ||
749 | add_listen_addr(options, p, port); | |
750 | ||
751 | break; | |
752 | ||
753 | case sAddressFamily: | |
754 | arg = strdelim(&cp); | |
665a873d | 755 | if (!arg || *arg == '\0') |
756 | fatal("%s line %d: missing address family.", | |
757 | filename, linenum); | |
996d5e62 | 758 | intptr = &options->address_family; |
759 | if (options->listen_addrs != NULL) | |
760 | fatal("%s line %d: address family must be specified before " | |
761 | "ListenAddress.", filename, linenum); | |
762 | if (strcasecmp(arg, "inet") == 0) | |
763 | value = AF_INET; | |
764 | else if (strcasecmp(arg, "inet6") == 0) | |
765 | value = AF_INET6; | |
766 | else if (strcasecmp(arg, "any") == 0) | |
767 | value = AF_UNSPEC; | |
768 | else | |
769 | fatal("%s line %d: unsupported address family \"%s\".", | |
770 | filename, linenum, arg); | |
771 | if (*intptr == -1) | |
772 | *intptr = value; | |
e9a17296 | 773 | break; |
774 | ||
775 | case sHostKeyFile: | |
776 | intptr = &options->num_host_key_files; | |
777 | if (*intptr >= MAX_HOSTKEYS) | |
778 | fatal("%s line %d: too many host keys specified (max %d).", | |
779 | filename, linenum, MAX_HOSTKEYS); | |
780 | charptr = &options->host_key_files[*intptr]; | |
22616013 | 781 | parse_filename: |
e9a17296 | 782 | arg = strdelim(&cp); |
783 | if (!arg || *arg == '\0') | |
784 | fatal("%s line %d: missing file name.", | |
785 | filename, linenum); | |
9108f8d9 | 786 | if (*activep && *charptr == NULL) { |
e9a17296 | 787 | *charptr = tilde_expand_filename(arg, getuid()); |
788 | /* increase optional counter */ | |
789 | if (intptr != NULL) | |
790 | *intptr = *intptr + 1; | |
791 | } | |
792 | break; | |
3c0ef626 | 793 | |
e9a17296 | 794 | case sPidFile: |
795 | charptr = &options->pid_file; | |
796 | goto parse_filename; | |
3c0ef626 | 797 | |
e9a17296 | 798 | case sPermitRootLogin: |
799 | intptr = &options->permit_root_login; | |
800 | arg = strdelim(&cp); | |
801 | if (!arg || *arg == '\0') | |
802 | fatal("%s line %d: missing yes/" | |
803 | "without-password/forced-commands-only/no " | |
804 | "argument.", filename, linenum); | |
805 | value = 0; /* silence compiler */ | |
806 | if (strcmp(arg, "without-password") == 0) | |
807 | value = PERMIT_NO_PASSWD; | |
808 | else if (strcmp(arg, "forced-commands-only") == 0) | |
809 | value = PERMIT_FORCED_ONLY; | |
810 | else if (strcmp(arg, "yes") == 0) | |
811 | value = PERMIT_YES; | |
812 | else if (strcmp(arg, "no") == 0) | |
813 | value = PERMIT_NO; | |
814 | else | |
815 | fatal("%s line %d: Bad yes/" | |
816 | "without-password/forced-commands-only/no " | |
817 | "argument: %s", filename, linenum, arg); | |
47686178 | 818 | if (*activep && *intptr == -1) |
e9a17296 | 819 | *intptr = value; |
820 | break; | |
821 | ||
822 | case sIgnoreRhosts: | |
823 | intptr = &options->ignore_rhosts; | |
22616013 | 824 | parse_flag: |
e9a17296 | 825 | arg = strdelim(&cp); |
826 | if (!arg || *arg == '\0') | |
827 | fatal("%s line %d: missing yes/no argument.", | |
828 | filename, linenum); | |
829 | value = 0; /* silence compiler */ | |
830 | if (strcmp(arg, "yes") == 0) | |
831 | value = 1; | |
832 | else if (strcmp(arg, "no") == 0) | |
833 | value = 0; | |
834 | else | |
835 | fatal("%s line %d: Bad yes/no argument: %s", | |
836 | filename, linenum, arg); | |
9108f8d9 | 837 | if (*activep && *intptr == -1) |
e9a17296 | 838 | *intptr = value; |
839 | break; | |
840 | ||
841 | case sIgnoreUserKnownHosts: | |
842 | intptr = &options->ignore_user_known_hosts; | |
843 | goto parse_flag; | |
844 | ||
e9a17296 | 845 | case sRhostsRSAAuthentication: |
846 | intptr = &options->rhosts_rsa_authentication; | |
847 | goto parse_flag; | |
848 | ||
849 | case sHostbasedAuthentication: | |
850 | intptr = &options->hostbased_authentication; | |
851 | goto parse_flag; | |
852 | ||
853 | case sHostbasedUsesNameFromPacketOnly: | |
854 | intptr = &options->hostbased_uses_name_from_packet_only; | |
855 | goto parse_flag; | |
856 | ||
857 | case sRSAAuthentication: | |
858 | intptr = &options->rsa_authentication; | |
859 | goto parse_flag; | |
860 | ||
861 | case sPubkeyAuthentication: | |
862 | intptr = &options->pubkey_authentication; | |
863 | goto parse_flag; | |
0fff78ff | 864 | |
e9a17296 | 865 | case sKerberosAuthentication: |
866 | intptr = &options->kerberos_authentication; | |
867 | goto parse_flag; | |
3c0ef626 | 868 | |
e9a17296 | 869 | case sKerberosOrLocalPasswd: |
870 | intptr = &options->kerberos_or_local_passwd; | |
871 | goto parse_flag; | |
3c0ef626 | 872 | |
e9a17296 | 873 | case sKerberosTicketCleanup: |
874 | intptr = &options->kerberos_ticket_cleanup; | |
875 | goto parse_flag; | |
0fff78ff | 876 | |
cdd66111 | 877 | case sKerberosGetAFSToken: |
878 | intptr = &options->kerberos_get_afs_token; | |
879 | goto parse_flag; | |
880 | ||
0fff78ff | 881 | case sGssAuthentication: |
882 | intptr = &options->gss_authentication; | |
e9a17296 | 883 | goto parse_flag; |
0fff78ff | 884 | |
885 | case sGssCleanupCreds: | |
886 | intptr = &options->gss_cleanup_creds; | |
e9a17296 | 887 | goto parse_flag; |
3c0ef626 | 888 | |
e9a17296 | 889 | case sPasswordAuthentication: |
890 | intptr = &options->password_authentication; | |
891 | goto parse_flag; | |
3c0ef626 | 892 | |
e9a17296 | 893 | case sKbdInteractiveAuthentication: |
894 | intptr = &options->kbd_interactive_authentication; | |
895 | goto parse_flag; | |
3c0ef626 | 896 | |
e9a17296 | 897 | case sChallengeResponseAuthentication: |
898 | intptr = &options->challenge_response_authentication; | |
899 | goto parse_flag; | |
3c0ef626 | 900 | |
e9a17296 | 901 | case sPrintMotd: |
902 | intptr = &options->print_motd; | |
903 | goto parse_flag; | |
3c0ef626 | 904 | |
e9a17296 | 905 | case sPrintLastLog: |
906 | intptr = &options->print_lastlog; | |
907 | goto parse_flag; | |
3c0ef626 | 908 | |
e9a17296 | 909 | case sX11Forwarding: |
910 | intptr = &options->x11_forwarding; | |
911 | goto parse_flag; | |
3c0ef626 | 912 | |
e9a17296 | 913 | case sX11DisplayOffset: |
914 | intptr = &options->x11_display_offset; | |
915 | goto parse_int; | |
3c0ef626 | 916 | |
e9a17296 | 917 | case sX11UseLocalhost: |
918 | intptr = &options->x11_use_localhost; | |
919 | goto parse_flag; | |
3c0ef626 | 920 | |
e9a17296 | 921 | case sXAuthLocation: |
922 | charptr = &options->xauth_location; | |
923 | goto parse_filename; | |
3c0ef626 | 924 | |
e9a17296 | 925 | case sStrictModes: |
926 | intptr = &options->strict_modes; | |
927 | goto parse_flag; | |
3c0ef626 | 928 | |
cdd66111 | 929 | case sTCPKeepAlive: |
930 | intptr = &options->tcp_keep_alive; | |
e9a17296 | 931 | goto parse_flag; |
3c0ef626 | 932 | |
e9a17296 | 933 | case sEmptyPasswd: |
934 | intptr = &options->permit_empty_passwd; | |
935 | goto parse_flag; | |
3c0ef626 | 936 | |
41b2f314 | 937 | case sPermitUserEnvironment: |
938 | intptr = &options->permit_user_env; | |
939 | goto parse_flag; | |
940 | ||
e9a17296 | 941 | case sUseLogin: |
942 | intptr = &options->use_login; | |
943 | goto parse_flag; | |
3c0ef626 | 944 | |
f5799ae1 | 945 | case sCompression: |
946 | intptr = &options->compression; | |
665a873d | 947 | arg = strdelim(&cp); |
948 | if (!arg || *arg == '\0') | |
949 | fatal("%s line %d: missing yes/no/delayed " | |
950 | "argument.", filename, linenum); | |
951 | value = 0; /* silence compiler */ | |
952 | if (strcmp(arg, "delayed") == 0) | |
953 | value = COMP_DELAYED; | |
954 | else if (strcmp(arg, "yes") == 0) | |
955 | value = COMP_ZLIB; | |
956 | else if (strcmp(arg, "no") == 0) | |
957 | value = COMP_NONE; | |
958 | else | |
959 | fatal("%s line %d: Bad yes/no/delayed " | |
960 | "argument: %s", filename, linenum, arg); | |
961 | if (*intptr == -1) | |
962 | *intptr = value; | |
963 | break; | |
f5799ae1 | 964 | |
e9a17296 | 965 | case sGatewayPorts: |
966 | intptr = &options->gateway_ports; | |
996d5e62 | 967 | arg = strdelim(&cp); |
968 | if (!arg || *arg == '\0') | |
969 | fatal("%s line %d: missing yes/no/clientspecified " | |
970 | "argument.", filename, linenum); | |
971 | value = 0; /* silence compiler */ | |
972 | if (strcmp(arg, "clientspecified") == 0) | |
973 | value = 2; | |
974 | else if (strcmp(arg, "yes") == 0) | |
975 | value = 1; | |
976 | else if (strcmp(arg, "no") == 0) | |
977 | value = 0; | |
978 | else | |
979 | fatal("%s line %d: Bad yes/no/clientspecified " | |
980 | "argument: %s", filename, linenum, arg); | |
799ae497 | 981 | if (*activep && *intptr == -1) |
996d5e62 | 982 | *intptr = value; |
983 | break; | |
3c0ef626 | 984 | |
0fff78ff | 985 | case sUseDNS: |
986 | intptr = &options->use_dns; | |
e9a17296 | 987 | goto parse_flag; |
3c0ef626 | 988 | |
e9a17296 | 989 | case sLogFacility: |
47686178 | 990 | log_facility_ptr = &options->log_facility; |
e9a17296 | 991 | arg = strdelim(&cp); |
992 | value = log_facility_number(arg); | |
993 | if (value == SYSLOG_FACILITY_NOT_SET) | |
994 | fatal("%.200s line %d: unsupported log facility '%s'", | |
995 | filename, linenum, arg ? arg : "<NONE>"); | |
47686178 | 996 | if (*log_facility_ptr == -1) |
997 | *log_facility_ptr = (SyslogFacility) value; | |
e9a17296 | 998 | break; |
999 | ||
1000 | case sLogLevel: | |
47686178 | 1001 | log_level_ptr = &options->log_level; |
e9a17296 | 1002 | arg = strdelim(&cp); |
1003 | value = log_level_number(arg); | |
1004 | if (value == SYSLOG_LEVEL_NOT_SET) | |
1005 | fatal("%.200s line %d: unsupported log level '%s'", | |
1006 | filename, linenum, arg ? arg : "<NONE>"); | |
47686178 | 1007 | if (*log_level_ptr == -1) |
1008 | *log_level_ptr = (LogLevel) value; | |
e9a17296 | 1009 | break; |
1010 | ||
1011 | case sAllowTcpForwarding: | |
1012 | intptr = &options->allow_tcp_forwarding; | |
1013 | goto parse_flag; | |
1014 | ||
22616013 | 1015 | case sAllowAgentForwarding: |
1016 | intptr = &options->allow_agent_forwarding; | |
1017 | goto parse_flag; | |
1018 | ||
700318f3 | 1019 | case sUsePrivilegeSeparation: |
1020 | intptr = &use_privsep; | |
1021 | goto parse_flag; | |
1022 | ||
e9a17296 | 1023 | case sAllowUsers: |
1024 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1025 | if (options->num_allow_users >= MAX_ALLOW_USERS) | |
1026 | fatal("%s line %d: too many allow users.", | |
1027 | filename, linenum); | |
680cee3b | 1028 | options->allow_users[options->num_allow_users++] = |
1029 | xstrdup(arg); | |
e9a17296 | 1030 | } |
1031 | break; | |
3c0ef626 | 1032 | |
e9a17296 | 1033 | case sDenyUsers: |
1034 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1035 | if (options->num_deny_users >= MAX_DENY_USERS) | |
9108f8d9 | 1036 | fatal("%s line %d: too many deny users.", |
e9a17296 | 1037 | filename, linenum); |
680cee3b | 1038 | options->deny_users[options->num_deny_users++] = |
1039 | xstrdup(arg); | |
e9a17296 | 1040 | } |
1041 | break; | |
3c0ef626 | 1042 | |
e9a17296 | 1043 | case sAllowGroups: |
1044 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1045 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) | |
1046 | fatal("%s line %d: too many allow groups.", | |
1047 | filename, linenum); | |
680cee3b | 1048 | options->allow_groups[options->num_allow_groups++] = |
1049 | xstrdup(arg); | |
e9a17296 | 1050 | } |
1051 | break; | |
3c0ef626 | 1052 | |
e9a17296 | 1053 | case sDenyGroups: |
1054 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1055 | if (options->num_deny_groups >= MAX_DENY_GROUPS) | |
1056 | fatal("%s line %d: too many deny groups.", | |
1057 | filename, linenum); | |
1058 | options->deny_groups[options->num_deny_groups++] = xstrdup(arg); | |
1059 | } | |
1060 | break; | |
1061 | ||
1062 | case sCiphers: | |
1063 | arg = strdelim(&cp); | |
1064 | if (!arg || *arg == '\0') | |
1065 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1066 | if (!ciphers_valid(arg)) | |
1067 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", | |
1068 | filename, linenum, arg ? arg : "<NONE>"); | |
1069 | if (options->ciphers == NULL) | |
1070 | options->ciphers = xstrdup(arg); | |
1071 | break; | |
1072 | ||
1073 | case sMacs: | |
1074 | arg = strdelim(&cp); | |
1075 | if (!arg || *arg == '\0') | |
1076 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1077 | if (!mac_valid(arg)) | |
1078 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", | |
1079 | filename, linenum, arg ? arg : "<NONE>"); | |
1080 | if (options->macs == NULL) | |
1081 | options->macs = xstrdup(arg); | |
1082 | break; | |
1083 | ||
1084 | case sProtocol: | |
1085 | intptr = &options->protocol; | |
1086 | arg = strdelim(&cp); | |
1087 | if (!arg || *arg == '\0') | |
1088 | fatal("%s line %d: Missing argument.", filename, linenum); | |
1089 | value = proto_spec(arg); | |
1090 | if (value == SSH_PROTO_UNKNOWN) | |
1091 | fatal("%s line %d: Bad protocol spec '%s'.", | |
1092 | filename, linenum, arg ? arg : "<NONE>"); | |
1093 | if (*intptr == SSH_PROTO_UNKNOWN) | |
1094 | *intptr = value; | |
1095 | break; | |
1096 | ||
1097 | case sSubsystem: | |
1098 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { | |
1099 | fatal("%s line %d: too many subsystems defined.", | |
1100 | filename, linenum); | |
1101 | } | |
1102 | arg = strdelim(&cp); | |
1103 | if (!arg || *arg == '\0') | |
1104 | fatal("%s line %d: Missing subsystem name.", | |
1105 | filename, linenum); | |
9108f8d9 | 1106 | if (!*activep) { |
1107 | arg = strdelim(&cp); | |
1108 | break; | |
1109 | } | |
e9a17296 | 1110 | for (i = 0; i < options->num_subsystems; i++) |
1111 | if (strcmp(arg, options->subsystem_name[i]) == 0) | |
1112 | fatal("%s line %d: Subsystem '%s' already defined.", | |
1113 | filename, linenum, arg); | |
1114 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); | |
1115 | arg = strdelim(&cp); | |
1116 | if (!arg || *arg == '\0') | |
1117 | fatal("%s line %d: Missing subsystem command.", | |
1118 | filename, linenum); | |
1119 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); | |
9108f8d9 | 1120 | |
1121 | /* Collect arguments (separate to executable) */ | |
1122 | p = xstrdup(arg); | |
1123 | len = strlen(p) + 1; | |
1124 | while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { | |
1125 | len += 1 + strlen(arg); | |
1126 | p = xrealloc(p, 1, len); | |
1127 | strlcat(p, " ", len); | |
1128 | strlcat(p, arg, len); | |
1129 | } | |
1130 | options->subsystem_args[options->num_subsystems] = p; | |
e9a17296 | 1131 | options->num_subsystems++; |
1132 | break; | |
1133 | ||
1134 | case sMaxStartups: | |
1135 | arg = strdelim(&cp); | |
1136 | if (!arg || *arg == '\0') | |
1137 | fatal("%s line %d: Missing MaxStartups spec.", | |
1138 | filename, linenum); | |
1139 | if ((n = sscanf(arg, "%d:%d:%d", | |
1140 | &options->max_startups_begin, | |
1141 | &options->max_startups_rate, | |
1142 | &options->max_startups)) == 3) { | |
1143 | if (options->max_startups_begin > | |
1144 | options->max_startups || | |
1145 | options->max_startups_rate > 100 || | |
1146 | options->max_startups_rate < 1) | |
3c0ef626 | 1147 | fatal("%s line %d: Illegal MaxStartups spec.", |
1148 | filename, linenum); | |
e9a17296 | 1149 | } else if (n != 1) |
1150 | fatal("%s line %d: Illegal MaxStartups spec.", | |
1151 | filename, linenum); | |
1152 | else | |
1153 | options->max_startups = options->max_startups_begin; | |
1154 | break; | |
1155 | ||
c9f39d2c | 1156 | case sMaxAuthTries: |
1157 | intptr = &options->max_authtries; | |
1158 | goto parse_int; | |
1159 | ||
22616013 | 1160 | case sMaxSessions: |
1161 | intptr = &options->max_sessions; | |
1162 | goto parse_int; | |
1163 | ||
e9a17296 | 1164 | case sBanner: |
1165 | charptr = &options->banner; | |
1166 | goto parse_filename; | |
47686178 | 1167 | |
e9a17296 | 1168 | /* |
1169 | * These options can contain %X options expanded at | |
1170 | * connect time, so that you can specify paths like: | |
1171 | * | |
1172 | * AuthorizedKeysFile /etc/ssh_keys/%u | |
1173 | */ | |
1174 | case sAuthorizedKeysFile: | |
1175 | case sAuthorizedKeysFile2: | |
9108f8d9 | 1176 | charptr = (opcode == sAuthorizedKeysFile) ? |
e9a17296 | 1177 | &options->authorized_keys_file : |
1178 | &options->authorized_keys_file2; | |
1179 | goto parse_filename; | |
1180 | ||
1181 | case sClientAliveInterval: | |
1182 | intptr = &options->client_alive_interval; | |
1183 | goto parse_time; | |
1184 | ||
1185 | case sClientAliveCountMax: | |
1186 | intptr = &options->client_alive_count_max; | |
1187 | goto parse_int; | |
1188 | ||
c9f39d2c | 1189 | case sAcceptEnv: |
1190 | while ((arg = strdelim(&cp)) && *arg != '\0') { | |
1191 | if (strchr(arg, '=') != NULL) | |
1192 | fatal("%s line %d: Invalid environment name.", | |
1193 | filename, linenum); | |
1194 | if (options->num_accept_env >= MAX_ACCEPT_ENV) | |
1195 | fatal("%s line %d: too many allow env.", | |
1196 | filename, linenum); | |
9108f8d9 | 1197 | if (!*activep) |
1198 | break; | |
c9f39d2c | 1199 | options->accept_env[options->num_accept_env++] = |
1200 | xstrdup(arg); | |
1201 | } | |
1202 | break; | |
1203 | ||
2c06c99b | 1204 | case sPermitTunnel: |
1205 | intptr = &options->permit_tun; | |
1206 | arg = strdelim(&cp); | |
1207 | if (!arg || *arg == '\0') | |
1208 | fatal("%s line %d: Missing yes/point-to-point/" | |
1209 | "ethernet/no argument.", filename, linenum); | |
22616013 | 1210 | value = -1; |
1211 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1212 | if (strcmp(tunmode_desc[i].text, arg) == 0) { | |
1213 | value = tunmode_desc[i].val; | |
1214 | break; | |
1215 | } | |
1216 | if (value == -1) | |
2c06c99b | 1217 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" |
1218 | "no argument: %s", filename, linenum, arg); | |
1219 | if (*intptr == -1) | |
1220 | *intptr = value; | |
1221 | break; | |
1222 | ||
9108f8d9 | 1223 | case sMatch: |
1224 | if (cmdline) | |
1225 | fatal("Match directive not supported as a command-line " | |
1226 | "option"); | |
1227 | value = match_cfg_line(&cp, linenum, user, host, address); | |
1228 | if (value < 0) | |
1229 | fatal("%s line %d: Bad Match condition", filename, | |
1230 | linenum); | |
1231 | *activep = value; | |
1232 | break; | |
1233 | ||
1234 | case sPermitOpen: | |
1235 | arg = strdelim(&cp); | |
1236 | if (!arg || *arg == '\0') | |
1237 | fatal("%s line %d: missing PermitOpen specification", | |
1238 | filename, linenum); | |
799ae497 | 1239 | n = options->num_permitted_opens; /* modified later */ |
9108f8d9 | 1240 | if (strcmp(arg, "any") == 0) { |
799ae497 | 1241 | if (*activep && n == -1) { |
9108f8d9 | 1242 | channel_clear_adm_permitted_opens(); |
1243 | options->num_permitted_opens = 0; | |
1244 | } | |
1245 | break; | |
1246 | } | |
799ae497 | 1247 | if (*activep && n == -1) |
1248 | channel_clear_adm_permitted_opens(); | |
9108f8d9 | 1249 | for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { |
1250 | p = hpdelim(&arg); | |
1251 | if (p == NULL) | |
1252 | fatal("%s line %d: missing host in PermitOpen", | |
1253 | filename, linenum); | |
1254 | p = cleanhostname(p); | |
1255 | if (arg == NULL || (port = a2port(arg)) == 0) | |
1256 | fatal("%s line %d: bad port number in " | |
1257 | "PermitOpen", filename, linenum); | |
799ae497 | 1258 | if (*activep && n == -1) |
9108f8d9 | 1259 | options->num_permitted_opens = |
1260 | channel_add_adm_permitted_opens(p, port); | |
9108f8d9 | 1261 | } |
1262 | break; | |
1263 | ||
1264 | case sForceCommand: | |
1265 | if (cp == NULL) | |
1266 | fatal("%.200s line %d: Missing argument.", filename, | |
1267 | linenum); | |
1268 | len = strspn(cp, WHITESPACE); | |
1269 | if (*activep && options->adm_forced_command == NULL) | |
1270 | options->adm_forced_command = xstrdup(cp + len); | |
1271 | return 0; | |
1272 | ||
47686178 | 1273 | case sChrootDirectory: |
1274 | charptr = &options->chroot_directory; | |
1275 | ||
1276 | arg = strdelim(&cp); | |
1277 | if (!arg || *arg == '\0') | |
1278 | fatal("%s line %d: missing file name.", | |
1279 | filename, linenum); | |
1280 | if (*activep && *charptr == NULL) | |
1281 | *charptr = xstrdup(arg); | |
1282 | break; | |
1283 | ||
e9a17296 | 1284 | case sDeprecated: |
0fff78ff | 1285 | logit("%s line %d: Deprecated option %s", |
1286 | filename, linenum, arg); | |
1287 | while (arg) | |
1288 | arg = strdelim(&cp); | |
1289 | break; | |
1290 | ||
1291 | case sUnsupported: | |
1292 | logit("%s line %d: Unsupported option %s", | |
e9a17296 | 1293 | filename, linenum, arg); |
1294 | while (arg) | |
1295 | arg = strdelim(&cp); | |
1296 | break; | |
1297 | ||
1298 | default: | |
1299 | fatal("%s line %d: Missing handler for opcode %s (%d)", | |
1300 | filename, linenum, arg, opcode); | |
1301 | } | |
1302 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') | |
1303 | fatal("%s line %d: garbage at end of line; \"%.200s\".", | |
1304 | filename, linenum, arg); | |
1305 | return 0; | |
1306 | } | |
3c0ef626 | 1307 | |
e9a17296 | 1308 | /* Reads the server configuration file. */ |
3c0ef626 | 1309 | |
e9a17296 | 1310 | void |
c9f39d2c | 1311 | load_server_config(const char *filename, Buffer *conf) |
e9a17296 | 1312 | { |
c9f39d2c | 1313 | char line[1024], *cp; |
680cee3b | 1314 | FILE *f; |
e9a17296 | 1315 | |
c9f39d2c | 1316 | debug2("%s: filename %s", __func__, filename); |
1317 | if ((f = fopen(filename, "r")) == NULL) { | |
e9a17296 | 1318 | perror(filename); |
1319 | exit(1); | |
1320 | } | |
c9f39d2c | 1321 | buffer_clear(conf); |
e9a17296 | 1322 | while (fgets(line, sizeof(line), f)) { |
c9f39d2c | 1323 | /* |
1324 | * Trim out comments and strip whitespace | |
1325 | * NB - preserve newlines, they are needed to reproduce | |
1326 | * line numbers later for error messages | |
1327 | */ | |
1328 | if ((cp = strchr(line, '#')) != NULL) | |
1329 | memcpy(cp, "\n", 2); | |
1330 | cp = line + strspn(line, " \t\r"); | |
1331 | ||
1332 | buffer_append(conf, cp, strlen(cp)); | |
3c0ef626 | 1333 | } |
c9f39d2c | 1334 | buffer_append(conf, "\0", 1); |
3c0ef626 | 1335 | fclose(f); |
c9f39d2c | 1336 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); |
1337 | } | |
1338 | ||
1339 | void | |
9108f8d9 | 1340 | parse_server_match_config(ServerOptions *options, const char *user, |
1341 | const char *host, const char *address) | |
1342 | { | |
1343 | ServerOptions mo; | |
1344 | ||
1345 | initialize_server_options(&mo); | |
1346 | parse_server_config(&mo, "reprocess config", &cfg, user, host, address); | |
799ae497 | 1347 | copy_set_server_options(options, &mo, 0); |
9108f8d9 | 1348 | } |
1349 | ||
799ae497 | 1350 | /* Helper macros */ |
1351 | #define M_CP_INTOPT(n) do {\ | |
1352 | if (src->n != -1) \ | |
1353 | dst->n = src->n; \ | |
1354 | } while (0) | |
1355 | #define M_CP_STROPT(n) do {\ | |
1356 | if (src->n != NULL) { \ | |
1357 | if (dst->n != NULL) \ | |
1358 | xfree(dst->n); \ | |
1359 | dst->n = src->n; \ | |
1360 | } \ | |
1361 | } while(0) | |
1362 | ||
1363 | /* | |
1364 | * Copy any supported values that are set. | |
1365 | * | |
1366 | * If the preauth flag is set, we do not bother copying the the string or | |
1367 | * array values that are not used pre-authentication, because any that we | |
1368 | * do use must be explictly sent in mm_getpwnamallow(). | |
1369 | */ | |
9108f8d9 | 1370 | void |
799ae497 | 1371 | copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) |
9108f8d9 | 1372 | { |
799ae497 | 1373 | M_CP_INTOPT(password_authentication); |
1374 | M_CP_INTOPT(gss_authentication); | |
1375 | M_CP_INTOPT(rsa_authentication); | |
1376 | M_CP_INTOPT(pubkey_authentication); | |
1377 | M_CP_INTOPT(kerberos_authentication); | |
1378 | M_CP_INTOPT(hostbased_authentication); | |
1379 | M_CP_INTOPT(kbd_interactive_authentication); | |
47686178 | 1380 | M_CP_INTOPT(permit_root_login); |
799ae497 | 1381 | |
1382 | M_CP_INTOPT(allow_tcp_forwarding); | |
22616013 | 1383 | M_CP_INTOPT(allow_agent_forwarding); |
799ae497 | 1384 | M_CP_INTOPT(gateway_ports); |
1385 | M_CP_INTOPT(x11_display_offset); | |
1386 | M_CP_INTOPT(x11_forwarding); | |
1387 | M_CP_INTOPT(x11_use_localhost); | |
22616013 | 1388 | M_CP_INTOPT(max_sessions); |
1389 | M_CP_INTOPT(max_authtries); | |
799ae497 | 1390 | |
1391 | M_CP_STROPT(banner); | |
1392 | if (preauth) | |
1393 | return; | |
1394 | M_CP_STROPT(adm_forced_command); | |
47686178 | 1395 | M_CP_STROPT(chroot_directory); |
9108f8d9 | 1396 | } |
1397 | ||
799ae497 | 1398 | #undef M_CP_INTOPT |
1399 | #undef M_CP_STROPT | |
1400 | ||
9108f8d9 | 1401 | void |
1402 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, | |
1403 | const char *user, const char *host, const char *address) | |
c9f39d2c | 1404 | { |
9108f8d9 | 1405 | int active, linenum, bad_options = 0; |
c9f39d2c | 1406 | char *cp, *obuf, *cbuf; |
1407 | ||
1408 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); | |
1409 | ||
1410 | obuf = cbuf = xstrdup(buffer_ptr(conf)); | |
9108f8d9 | 1411 | active = user ? 0 : 1; |
c9f39d2c | 1412 | linenum = 1; |
dec6d9fe | 1413 | while ((cp = strsep(&cbuf, "\n")) != NULL) { |
c9f39d2c | 1414 | if (process_server_config_line(options, cp, filename, |
9108f8d9 | 1415 | linenum++, &active, user, host, address) != 0) |
c9f39d2c | 1416 | bad_options++; |
1417 | } | |
1418 | xfree(obuf); | |
3c0ef626 | 1419 | if (bad_options > 0) |
1420 | fatal("%s: terminating, %d bad configuration options", | |
1421 | filename, bad_options); | |
1422 | } | |
22616013 | 1423 | |
1424 | static const char * | |
1425 | fmt_intarg(ServerOpCodes code, int val) | |
1426 | { | |
1427 | if (code == sAddressFamily) { | |
1428 | switch (val) { | |
1429 | case AF_INET: | |
1430 | return "inet"; | |
1431 | case AF_INET6: | |
1432 | return "inet6"; | |
1433 | case AF_UNSPEC: | |
1434 | return "any"; | |
1435 | default: | |
1436 | return "UNKNOWN"; | |
1437 | } | |
1438 | } | |
1439 | if (code == sPermitRootLogin) { | |
1440 | switch (val) { | |
1441 | case PERMIT_NO_PASSWD: | |
1442 | return "without-passord"; | |
1443 | case PERMIT_FORCED_ONLY: | |
1444 | return "forced-commands-only"; | |
1445 | case PERMIT_YES: | |
1446 | return "yes"; | |
1447 | } | |
1448 | } | |
1449 | if (code == sProtocol) { | |
1450 | switch (val) { | |
1451 | case SSH_PROTO_1: | |
1452 | return "1"; | |
1453 | case SSH_PROTO_2: | |
1454 | return "2"; | |
1455 | case (SSH_PROTO_1|SSH_PROTO_2): | |
1456 | return "2,1"; | |
1457 | default: | |
1458 | return "UNKNOWN"; | |
1459 | } | |
1460 | } | |
1461 | if (code == sGatewayPorts && val == 2) | |
1462 | return "clientspecified"; | |
1463 | if (code == sCompression && val == COMP_DELAYED) | |
1464 | return "delayed"; | |
1465 | switch (val) { | |
1466 | case -1: | |
1467 | return "unset"; | |
1468 | case 0: | |
1469 | return "no"; | |
1470 | case 1: | |
1471 | return "yes"; | |
1472 | } | |
1473 | return "UNKNOWN"; | |
1474 | } | |
1475 | ||
1476 | static const char * | |
1477 | lookup_opcode_name(ServerOpCodes code) | |
1478 | { | |
1479 | u_int i; | |
1480 | ||
1481 | for (i = 0; keywords[i].name != NULL; i++) | |
1482 | if (keywords[i].opcode == code) | |
1483 | return(keywords[i].name); | |
1484 | return "UNKNOWN"; | |
1485 | } | |
1486 | ||
1487 | static void | |
1488 | dump_cfg_int(ServerOpCodes code, int val) | |
1489 | { | |
1490 | printf("%s %d\n", lookup_opcode_name(code), val); | |
1491 | } | |
1492 | ||
1493 | static void | |
1494 | dump_cfg_fmtint(ServerOpCodes code, int val) | |
1495 | { | |
1496 | printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); | |
1497 | } | |
1498 | ||
1499 | static void | |
1500 | dump_cfg_string(ServerOpCodes code, const char *val) | |
1501 | { | |
1502 | if (val == NULL) | |
1503 | return; | |
1504 | printf("%s %s\n", lookup_opcode_name(code), val); | |
1505 | } | |
1506 | ||
1507 | static void | |
1508 | dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals) | |
1509 | { | |
1510 | u_int i; | |
1511 | ||
1512 | for (i = 0; i < count; i++) | |
1513 | printf("%s %s\n", lookup_opcode_name(code), vals[i]); | |
1514 | } | |
1515 | ||
1516 | void | |
1517 | dump_config(ServerOptions *o) | |
1518 | { | |
1519 | u_int i; | |
1520 | int ret; | |
1521 | struct addrinfo *ai; | |
1522 | char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL; | |
1523 | ||
1524 | /* these are usually at the top of the config */ | |
1525 | for (i = 0; i < o->num_ports; i++) | |
1526 | printf("port %d\n", o->ports[i]); | |
1527 | dump_cfg_fmtint(sProtocol, o->protocol); | |
1528 | dump_cfg_fmtint(sAddressFamily, o->address_family); | |
1529 | ||
1530 | /* ListenAddress must be after Port */ | |
1531 | for (ai = o->listen_addrs; ai; ai = ai->ai_next) { | |
1532 | if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, | |
1533 | sizeof(addr), port, sizeof(port), | |
1534 | NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { | |
1535 | error("getnameinfo failed: %.100s", | |
1536 | (ret != EAI_SYSTEM) ? gai_strerror(ret) : | |
1537 | strerror(errno)); | |
1538 | } else { | |
1539 | if (ai->ai_family == AF_INET6) | |
1540 | printf("listenaddress [%s]:%s\n", addr, port); | |
1541 | else | |
1542 | printf("listenaddress %s:%s\n", addr, port); | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | /* integer arguments */ | |
1547 | dump_cfg_int(sServerKeyBits, o->server_key_bits); | |
1548 | dump_cfg_int(sLoginGraceTime, o->login_grace_time); | |
1549 | dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time); | |
1550 | dump_cfg_int(sX11DisplayOffset, o->x11_display_offset); | |
1551 | dump_cfg_int(sMaxAuthTries, o->max_authtries); | |
1552 | dump_cfg_int(sClientAliveInterval, o->client_alive_interval); | |
1553 | dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); | |
1554 | ||
1555 | /* formatted integer arguments */ | |
1556 | dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); | |
1557 | dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts); | |
1558 | dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts); | |
1559 | dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication); | |
1560 | dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication); | |
1561 | dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly, | |
1562 | o->hostbased_uses_name_from_packet_only); | |
1563 | dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication); | |
1564 | dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication); | |
1565 | dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication); | |
1566 | dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd); | |
1567 | dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup); | |
1568 | dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token); | |
1569 | dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); | |
1570 | dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); | |
1571 | dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); | |
1572 | dump_cfg_fmtint(sKbdInteractiveAuthentication, | |
1573 | o->kbd_interactive_authentication); | |
1574 | dump_cfg_fmtint(sChallengeResponseAuthentication, | |
1575 | o->challenge_response_authentication); | |
1576 | dump_cfg_fmtint(sPrintMotd, o->print_motd); | |
1577 | dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); | |
1578 | dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); | |
1579 | dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); | |
1580 | dump_cfg_fmtint(sStrictModes, o->strict_modes); | |
1581 | dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); | |
1582 | dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); | |
1583 | dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); | |
1584 | dump_cfg_fmtint(sUseLogin, o->use_login); | |
1585 | dump_cfg_fmtint(sCompression, o->compression); | |
1586 | dump_cfg_fmtint(sGatewayPorts, o->gateway_ports); | |
1587 | dump_cfg_fmtint(sUseDNS, o->use_dns); | |
1588 | dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); | |
1589 | dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep); | |
1590 | ||
1591 | /* string arguments */ | |
1592 | dump_cfg_string(sPidFile, o->pid_file); | |
1593 | dump_cfg_string(sXAuthLocation, o->xauth_location); | |
1594 | dump_cfg_string(sCiphers, o->ciphers); | |
1595 | dump_cfg_string(sMacs, o->macs); | |
1596 | dump_cfg_string(sBanner, o->banner); | |
1597 | dump_cfg_string(sAuthorizedKeysFile, o->authorized_keys_file); | |
1598 | dump_cfg_string(sAuthorizedKeysFile2, o->authorized_keys_file2); | |
1599 | dump_cfg_string(sForceCommand, o->adm_forced_command); | |
1600 | ||
1601 | /* string arguments requiring a lookup */ | |
1602 | dump_cfg_string(sLogLevel, log_level_name(o->log_level)); | |
1603 | dump_cfg_string(sLogFacility, log_facility_name(o->log_facility)); | |
1604 | ||
1605 | /* string array arguments */ | |
1606 | dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, | |
1607 | o->host_key_files); | |
1608 | dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); | |
1609 | dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); | |
1610 | dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); | |
1611 | dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); | |
1612 | dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); | |
1613 | ||
1614 | /* other arguments */ | |
1615 | for (i = 0; i < o->num_subsystems; i++) | |
1616 | printf("subsystem %s %s\n", o->subsystem_name[i], | |
1617 | o->subsystem_args[i]); | |
1618 | ||
1619 | printf("maxstartups %d:%d:%d\n", o->max_startups_begin, | |
1620 | o->max_startups_rate, o->max_startups); | |
1621 | ||
1622 | for (i = 0; tunmode_desc[i].val != -1; i++) | |
1623 | if (tunmode_desc[i].val == o->permit_tun) { | |
1624 | s = tunmode_desc[i].text; | |
1625 | break; | |
1626 | } | |
1627 | dump_cfg_string(sPermitTunnel, s); | |
1628 | ||
1629 | printf("permitopen"); | |
1630 | channel_print_adm_permitted_opens(); | |
1631 | printf("\n"); | |
1632 | } |