1 /* $OpenBSD: servconf.c,v 1.402 2023/09/08 06:34:24 djm Exp $ */
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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".
15 #include <sys/types.h>
16 #include <sys/socket.h>
19 #include <sys/sysctl.h>
22 #include <netinet/in.h>
23 #include <netinet/in_systm.h>
24 #include <netinet/ip.h>
25 #ifdef HAVE_NET_ROUTE_H
26 #include <net/route.h>
43 #ifdef USE_SYSTEM_GLOB
46 # include "openbsd-compat/glob.h"
49 #include "openbsd-compat/sys-queue.h"
56 #include "pathnames.h"
63 #include "groupaccess.h"
69 #include "myproposal.h"
73 static void add_listen_addr(ServerOptions *, const char *,
75 static void add_one_listen_addr(ServerOptions *, const char *,
77 static void parse_server_config_depth(ServerOptions *options,
78 const char *filename, struct sshbuf *conf, struct include_list *includes,
79 struct connection_info *connectinfo, int flags, int *activep, int depth);
81 /* Use of privilege separation or not */
82 extern int use_privsep;
83 extern struct sshbuf *cfg;
85 /* Initializes the server options to their default values. */
88 initialize_server_options(ServerOptions *options)
90 memset(options, 0, sizeof(*options));
92 /* Portable-specific options */
93 options->use_pam = -1;
95 /* Standard Options */
96 options->num_ports = 0;
97 options->ports_from_cmdline = 0;
98 options->queued_listen_addrs = NULL;
99 options->num_queued_listens = 0;
100 options->listen_addrs = NULL;
101 options->num_listen_addrs = 0;
102 options->address_family = -1;
103 options->routing_domain = NULL;
104 options->num_host_key_files = 0;
105 options->num_host_cert_files = 0;
106 options->host_key_agent = NULL;
107 options->pid_file = NULL;
108 options->login_grace_time = -1;
109 options->permit_root_login = PERMIT_NOT_SET;
110 options->ignore_rhosts = -1;
111 options->ignore_user_known_hosts = -1;
112 options->print_motd = -1;
113 options->print_lastlog = -1;
114 options->x11_forwarding = -1;
115 options->x11_display_offset = -1;
116 options->x11_use_localhost = -1;
117 options->permit_tty = -1;
118 options->permit_user_rc = -1;
119 options->xauth_location = NULL;
120 options->strict_modes = -1;
121 options->tcp_keep_alive = -1;
122 options->log_facility = SYSLOG_FACILITY_NOT_SET;
123 options->log_level = SYSLOG_LEVEL_NOT_SET;
124 options->num_log_verbose = 0;
125 options->log_verbose = NULL;
126 options->hostbased_authentication = -1;
127 options->hostbased_uses_name_from_packet_only = -1;
128 options->hostbased_accepted_algos = NULL;
129 options->hostkeyalgorithms = NULL;
130 options->pubkey_authentication = -1;
131 options->pubkey_auth_options = -1;
132 options->pubkey_accepted_algos = NULL;
133 options->kerberos_authentication = -1;
134 options->kerberos_or_local_passwd = -1;
135 options->kerberos_ticket_cleanup = -1;
136 options->kerberos_get_afs_token = -1;
137 options->gss_authentication=-1;
138 options->gss_cleanup_creds = -1;
139 options->gss_strict_acceptor = -1;
140 options->password_authentication = -1;
141 options->kbd_interactive_authentication = -1;
142 options->permit_empty_passwd = -1;
143 options->permit_user_env = -1;
144 options->permit_user_env_allowlist = NULL;
145 options->compression = -1;
146 options->rekey_limit = -1;
147 options->rekey_interval = -1;
148 options->allow_tcp_forwarding = -1;
149 options->allow_streamlocal_forwarding = -1;
150 options->allow_agent_forwarding = -1;
151 options->num_allow_users = 0;
152 options->num_deny_users = 0;
153 options->num_allow_groups = 0;
154 options->num_deny_groups = 0;
155 options->ciphers = NULL;
156 options->macs = NULL;
157 options->kex_algorithms = NULL;
158 options->ca_sign_algorithms = NULL;
159 options->fwd_opts.gateway_ports = -1;
160 options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
161 options->fwd_opts.streamlocal_bind_unlink = -1;
162 options->num_subsystems = 0;
163 options->max_startups_begin = -1;
164 options->max_startups_rate = -1;
165 options->max_startups = -1;
166 options->per_source_max_startups = -1;
167 options->per_source_masklen_ipv4 = -1;
168 options->per_source_masklen_ipv6 = -1;
169 options->max_authtries = -1;
170 options->max_sessions = -1;
171 options->banner = NULL;
172 options->use_dns = -1;
173 options->client_alive_interval = -1;
174 options->client_alive_count_max = -1;
175 options->num_authkeys_files = 0;
176 options->num_accept_env = 0;
177 options->num_setenv = 0;
178 options->permit_tun = -1;
179 options->permitted_opens = NULL;
180 options->permitted_listens = NULL;
181 options->adm_forced_command = NULL;
182 options->chroot_directory = NULL;
183 options->authorized_keys_command = NULL;
184 options->authorized_keys_command_user = NULL;
185 options->revoked_keys_file = NULL;
186 options->sk_provider = NULL;
187 options->trusted_user_ca_keys = NULL;
188 options->authorized_principals_file = NULL;
189 options->authorized_principals_command = NULL;
190 options->authorized_principals_command_user = NULL;
191 options->ip_qos_interactive = -1;
192 options->ip_qos_bulk = -1;
193 options->version_addendum = NULL;
194 options->fingerprint_hash = -1;
195 options->disable_forwarding = -1;
196 options->expose_userauth_info = -1;
197 options->required_rsa_size = -1;
198 options->channel_timeouts = NULL;
199 options->num_channel_timeouts = 0;
200 options->unused_connection_timeout = -1;
201 options->use_blacklist = -1;
204 /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
206 option_clear_or_none(const char *o)
208 return o == NULL || strcasecmp(o, "none") == 0;
212 assemble_algorithms(ServerOptions *o)
214 char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
215 char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
218 all_cipher = cipher_alg_list(',', 0);
219 all_mac = mac_alg_list(',');
220 all_kex = kex_alg_list(',');
221 all_key = sshkey_alg_list(0, 0, 1, ',');
222 all_sig = sshkey_alg_list(0, 1, 1, ',');
223 /* remove unsupported algos from default lists */
224 def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
225 def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
226 def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
227 def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
228 def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
229 #define ASSEMBLE(what, defaults, all) \
231 if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
232 fatal_fr(r, "%s", #what); \
234 ASSEMBLE(ciphers, def_cipher, all_cipher);
235 ASSEMBLE(macs, def_mac, all_mac);
236 ASSEMBLE(kex_algorithms, def_kex, all_kex);
237 ASSEMBLE(hostkeyalgorithms, def_key, all_key);
238 ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
239 ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
240 ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
254 static const char *defaultkey = "[default]";
257 servconf_add_hostkey(const char *file, const int line,
258 ServerOptions *options, const char *path, int userprovided)
260 char *apath = derelativise_path(path);
262 if (file == defaultkey && access(path, R_OK) != 0)
264 opt_array_append2(file, line, "HostKey",
265 &options->host_key_files, &options->host_key_file_userprovided,
266 &options->num_host_key_files, apath, userprovided);
271 servconf_add_hostcert(const char *file, const int line,
272 ServerOptions *options, const char *path)
274 char *apath = derelativise_path(path);
276 opt_array_append(file, line, "HostCertificate",
277 &options->host_cert_files, &options->num_host_cert_files, apath);
282 fill_default_server_options(ServerOptions *options)
286 /* Portable-specific options */
287 if (options->use_pam == -1)
288 options->use_pam = 1;
290 /* Standard Options */
291 if (options->num_host_key_files == 0) {
292 /* fill default hostkeys for protocols */
293 servconf_add_hostkey(defaultkey, 0, options,
294 _PATH_HOST_RSA_KEY_FILE, 0);
295 #ifdef OPENSSL_HAS_ECC
296 servconf_add_hostkey(defaultkey, 0, options,
297 _PATH_HOST_ECDSA_KEY_FILE, 0);
299 servconf_add_hostkey(defaultkey, 0, options,
300 _PATH_HOST_ED25519_KEY_FILE, 0);
302 servconf_add_hostkey(defaultkey, 0, options,
303 _PATH_HOST_XMSS_KEY_FILE, 0);
304 #endif /* WITH_XMSS */
306 if (options->num_host_key_files == 0)
307 fatal("No host key files found");
308 /* No certificates by default */
309 if (options->num_ports == 0)
310 options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
311 if (options->address_family == -1)
312 options->address_family = AF_UNSPEC;
313 if (options->listen_addrs == NULL)
314 add_listen_addr(options, NULL, NULL, 0);
315 if (options->pid_file == NULL)
316 options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
317 if (options->moduli_file == NULL)
318 options->moduli_file = xstrdup(_PATH_DH_MODULI);
319 if (options->login_grace_time == -1)
320 options->login_grace_time = 120;
321 if (options->permit_root_login == PERMIT_NOT_SET)
322 options->permit_root_login = PERMIT_NO;
323 if (options->ignore_rhosts == -1)
324 options->ignore_rhosts = 1;
325 if (options->ignore_user_known_hosts == -1)
326 options->ignore_user_known_hosts = 0;
327 if (options->print_motd == -1)
328 options->print_motd = 1;
329 if (options->print_lastlog == -1)
330 options->print_lastlog = 1;
331 if (options->x11_forwarding == -1)
332 options->x11_forwarding = 0;
333 if (options->x11_display_offset == -1)
334 options->x11_display_offset = 10;
335 if (options->x11_use_localhost == -1)
336 options->x11_use_localhost = 1;
337 if (options->xauth_location == NULL)
338 options->xauth_location = xstrdup(_PATH_XAUTH);
339 if (options->permit_tty == -1)
340 options->permit_tty = 1;
341 if (options->permit_user_rc == -1)
342 options->permit_user_rc = 1;
343 if (options->strict_modes == -1)
344 options->strict_modes = 1;
345 if (options->tcp_keep_alive == -1)
346 options->tcp_keep_alive = 1;
347 if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
348 options->log_facility = SYSLOG_FACILITY_AUTH;
349 if (options->log_level == SYSLOG_LEVEL_NOT_SET)
350 options->log_level = SYSLOG_LEVEL_INFO;
351 if (options->hostbased_authentication == -1)
352 options->hostbased_authentication = 0;
353 if (options->hostbased_uses_name_from_packet_only == -1)
354 options->hostbased_uses_name_from_packet_only = 0;
355 if (options->pubkey_authentication == -1)
356 options->pubkey_authentication = 1;
357 if (options->pubkey_auth_options == -1)
358 options->pubkey_auth_options = 0;
359 if (options->kerberos_authentication == -1)
360 options->kerberos_authentication = 0;
361 if (options->kerberos_or_local_passwd == -1)
362 options->kerberos_or_local_passwd = 1;
363 if (options->kerberos_ticket_cleanup == -1)
364 options->kerberos_ticket_cleanup = 1;
365 if (options->kerberos_get_afs_token == -1)
366 options->kerberos_get_afs_token = 0;
367 if (options->gss_authentication == -1)
368 options->gss_authentication = 0;
369 if (options->gss_cleanup_creds == -1)
370 options->gss_cleanup_creds = 1;
371 if (options->gss_strict_acceptor == -1)
372 options->gss_strict_acceptor = 1;
373 if (options->password_authentication == -1)
374 options->password_authentication = 0;
375 if (options->kbd_interactive_authentication == -1)
376 options->kbd_interactive_authentication = 1;
377 if (options->permit_empty_passwd == -1)
378 options->permit_empty_passwd = 0;
379 if (options->permit_user_env == -1) {
380 options->permit_user_env = 0;
381 options->permit_user_env_allowlist = NULL;
383 if (options->compression == -1)
385 options->compression = COMP_DELAYED;
387 options->compression = COMP_NONE;
390 if (options->rekey_limit == -1)
391 options->rekey_limit = 0;
392 if (options->rekey_interval == -1)
393 options->rekey_interval = 0;
394 if (options->allow_tcp_forwarding == -1)
395 options->allow_tcp_forwarding = FORWARD_ALLOW;
396 if (options->allow_streamlocal_forwarding == -1)
397 options->allow_streamlocal_forwarding = FORWARD_ALLOW;
398 if (options->allow_agent_forwarding == -1)
399 options->allow_agent_forwarding = 1;
400 if (options->fwd_opts.gateway_ports == -1)
401 options->fwd_opts.gateway_ports = 0;
402 if (options->max_startups == -1)
403 options->max_startups = 100;
404 if (options->max_startups_rate == -1)
405 options->max_startups_rate = 30; /* 30% */
406 if (options->max_startups_begin == -1)
407 options->max_startups_begin = 10;
408 if (options->per_source_max_startups == -1)
409 options->per_source_max_startups = INT_MAX;
410 if (options->per_source_masklen_ipv4 == -1)
411 options->per_source_masklen_ipv4 = 32;
412 if (options->per_source_masklen_ipv6 == -1)
413 options->per_source_masklen_ipv6 = 128;
414 if (options->max_authtries == -1)
415 options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
416 if (options->max_sessions == -1)
417 options->max_sessions = DEFAULT_SESSIONS_MAX;
418 if (options->use_dns == -1)
419 options->use_dns = 1;
420 if (options->client_alive_interval == -1)
421 options->client_alive_interval = 0;
422 if (options->client_alive_count_max == -1)
423 options->client_alive_count_max = 3;
424 if (options->num_authkeys_files == 0) {
425 opt_array_append(defaultkey, 0, "AuthorizedKeysFiles",
426 &options->authorized_keys_files,
427 &options->num_authkeys_files,
428 _PATH_SSH_USER_PERMITTED_KEYS);
429 opt_array_append(defaultkey, 0, "AuthorizedKeysFiles",
430 &options->authorized_keys_files,
431 &options->num_authkeys_files,
432 _PATH_SSH_USER_PERMITTED_KEYS2);
434 if (options->permit_tun == -1)
435 options->permit_tun = SSH_TUNMODE_NO;
436 if (options->ip_qos_interactive == -1)
437 options->ip_qos_interactive = IPTOS_DSCP_AF21;
438 if (options->ip_qos_bulk == -1)
439 options->ip_qos_bulk = IPTOS_DSCP_CS1;
440 if (options->version_addendum == NULL)
441 options->version_addendum = xstrdup(SSH_VERSION_FREEBSD);
442 if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
443 options->fwd_opts.streamlocal_bind_mask = 0177;
444 if (options->fwd_opts.streamlocal_bind_unlink == -1)
445 options->fwd_opts.streamlocal_bind_unlink = 0;
446 if (options->fingerprint_hash == -1)
447 options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
448 if (options->disable_forwarding == -1)
449 options->disable_forwarding = 0;
450 if (options->expose_userauth_info == -1)
451 options->expose_userauth_info = 0;
452 if (options->sk_provider == NULL)
453 options->sk_provider = xstrdup("internal");
454 if (options->required_rsa_size == -1)
455 options->required_rsa_size = SSH_RSA_MINIMUM_MODULUS_SIZE;
456 if (options->unused_connection_timeout == -1)
457 options->unused_connection_timeout = 0;
458 if (options->use_blacklist == -1)
459 options->use_blacklist = 0;
461 assemble_algorithms(options);
463 /* Turn privilege separation and sandboxing on by default */
464 if (use_privsep == -1)
465 use_privsep = PRIVSEP_ON;
467 #define CLEAR_ON_NONE(v) \
469 if (option_clear_or_none(v)) { \
474 #define CLEAR_ON_NONE_ARRAY(v, nv, none) \
476 if (options->nv == 1 && \
477 strcasecmp(options->v[0], none) == 0) { \
478 free(options->v[0]); \
484 CLEAR_ON_NONE(options->pid_file);
485 CLEAR_ON_NONE(options->xauth_location);
486 CLEAR_ON_NONE(options->banner);
487 CLEAR_ON_NONE(options->trusted_user_ca_keys);
488 CLEAR_ON_NONE(options->revoked_keys_file);
489 CLEAR_ON_NONE(options->sk_provider);
490 CLEAR_ON_NONE(options->authorized_principals_file);
491 CLEAR_ON_NONE(options->adm_forced_command);
492 CLEAR_ON_NONE(options->chroot_directory);
493 CLEAR_ON_NONE(options->routing_domain);
494 CLEAR_ON_NONE(options->host_key_agent);
496 for (i = 0; i < options->num_host_key_files; i++)
497 CLEAR_ON_NONE(options->host_key_files[i]);
498 for (i = 0; i < options->num_host_cert_files; i++)
499 CLEAR_ON_NONE(options->host_cert_files[i]);
501 CLEAR_ON_NONE_ARRAY(channel_timeouts, num_channel_timeouts, "none");
502 CLEAR_ON_NONE_ARRAY(auth_methods, num_auth_methods, "any");
504 #undef CLEAR_ON_NONE_ARRAY
507 /* Keyword tokens. */
509 sBadOption, /* == unknown option */
510 /* Portable-specific options */
512 /* Standard Options */
513 sPort, sHostKeyFile, sLoginGraceTime,
514 sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
515 sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
516 sKerberosGetAFSToken, sPasswordAuthentication,
517 sKbdInteractiveAuthentication, sListenAddress, sAddressFamily,
518 sPrintMotd, sPrintLastLog, sIgnoreRhosts,
519 sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
520 sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
521 sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
522 sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
523 sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile, sModuliFile,
524 sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
525 sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
526 sBanner, sUseDNS, sHostbasedAuthentication,
527 sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
528 sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
529 sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
530 sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
531 sAcceptEnv, sSetEnv, sPermitTunnel,
532 sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
533 sUsePrivilegeSeparation, sAllowAgentForwarding,
534 sHostCertificate, sInclude,
535 sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
536 sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
537 sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
538 sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
539 sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
540 sStreamLocalBindMask, sStreamLocalBindUnlink,
541 sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
542 sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
543 sRequiredRSASize, sChannelTimeout, sUnusedConnectionTimeout,
545 sDeprecated, sIgnore, sUnsupported
548 #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
549 #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
550 #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
551 #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
552 #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
554 /* Textual representation of the tokens. */
557 ServerOpCodes opcode;
560 /* Portable-specific options */
562 { "usepam", sUsePAM, SSHCFG_GLOBAL },
564 { "usepam", sUnsupported, SSHCFG_GLOBAL },
566 { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL },
567 /* Standard Options */
568 { "port", sPort, SSHCFG_GLOBAL },
569 { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
570 { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
571 { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
572 { "pidfile", sPidFile, SSHCFG_GLOBAL },
573 { "modulifile", sModuliFile, SSHCFG_GLOBAL },
574 { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
575 { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
576 { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
577 { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
578 { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
579 { "loglevel", sLogLevel, SSHCFG_ALL },
580 { "logverbose", sLogVerbose, SSHCFG_ALL },
581 { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
582 { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
583 { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
584 { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
585 { "hostbasedacceptedalgorithms", sHostbasedAcceptedAlgorithms, SSHCFG_ALL },
586 { "hostbasedacceptedkeytypes", sHostbasedAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
587 { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
588 { "rsaauthentication", sDeprecated, SSHCFG_ALL },
589 { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
590 { "pubkeyacceptedalgorithms", sPubkeyAcceptedAlgorithms, SSHCFG_ALL },
591 { "pubkeyacceptedkeytypes", sPubkeyAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
592 { "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
593 { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
595 { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
596 { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
597 { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
599 { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
601 { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
604 { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
605 { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
606 { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
607 { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
609 { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
610 { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
612 { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
613 { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
614 { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
616 { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
617 { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
618 { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
620 { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
621 { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
622 { "challengeresponseauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
623 { "skeyauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
624 { "checkmail", sDeprecated, SSHCFG_GLOBAL },
625 { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
626 { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
627 { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
628 #ifdef DISABLE_LASTLOG
629 { "printlastlog", sUnsupported, SSHCFG_GLOBAL },
631 { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
633 { "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
634 { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
635 { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
636 { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
637 { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
638 { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
639 { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
640 { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
641 { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
642 { "uselogin", sDeprecated, SSHCFG_GLOBAL },
643 { "compression", sCompression, SSHCFG_GLOBAL },
644 { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
645 { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
646 { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
647 { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
648 { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
649 { "allowusers", sAllowUsers, SSHCFG_ALL },
650 { "denyusers", sDenyUsers, SSHCFG_ALL },
651 { "allowgroups", sAllowGroups, SSHCFG_ALL },
652 { "denygroups", sDenyGroups, SSHCFG_ALL },
653 { "ciphers", sCiphers, SSHCFG_GLOBAL },
654 { "macs", sMacs, SSHCFG_GLOBAL },
655 { "protocol", sIgnore, SSHCFG_GLOBAL },
656 { "gatewayports", sGatewayPorts, SSHCFG_ALL },
657 { "subsystem", sSubsystem, SSHCFG_ALL },
658 { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
659 { "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
660 { "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
661 { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
662 { "maxsessions", sMaxSessions, SSHCFG_ALL },
663 { "banner", sBanner, SSHCFG_ALL },
664 { "usedns", sUseDNS, SSHCFG_GLOBAL },
665 { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
666 { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
667 { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
668 { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
669 { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
670 { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
671 { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
672 { "acceptenv", sAcceptEnv, SSHCFG_ALL },
673 { "setenv", sSetEnv, SSHCFG_ALL },
674 { "permittunnel", sPermitTunnel, SSHCFG_ALL },
675 { "permittty", sPermitTTY, SSHCFG_ALL },
676 { "permituserrc", sPermitUserRC, SSHCFG_ALL },
677 { "match", sMatch, SSHCFG_ALL },
678 { "permitopen", sPermitOpen, SSHCFG_ALL },
679 { "permitlisten", sPermitListen, SSHCFG_ALL },
680 { "forcecommand", sForceCommand, SSHCFG_ALL },
681 { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
682 { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
683 { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
684 { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
685 { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
686 { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
687 { "include", sInclude, SSHCFG_ALL },
688 { "ipqos", sIPQoS, SSHCFG_ALL },
689 { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
690 { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
691 { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
692 { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
693 { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
694 { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
695 { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
696 { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
697 { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
698 { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
699 { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
700 { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
701 { "rdomain", sRDomain, SSHCFG_ALL },
702 { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
703 { "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
704 { "requiredrsasize", sRequiredRSASize, SSHCFG_ALL },
705 { "channeltimeout", sChannelTimeout, SSHCFG_ALL },
706 { "unusedconnectiontimeout", sUnusedConnectionTimeout, SSHCFG_ALL },
707 { "useblacklist", sUseBlacklist, SSHCFG_GLOBAL },
708 { "useblocklist", sUseBlacklist, SSHCFG_GLOBAL }, /* alias */
710 { NULL, sBadOption, 0 }
717 { SSH_TUNMODE_NO, "no" },
718 { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
719 { SSH_TUNMODE_ETHERNET, "ethernet" },
720 { SSH_TUNMODE_YES, "yes" },
724 /* Returns an opcode name from its number */
727 lookup_opcode_name(ServerOpCodes code)
731 for (i = 0; keywords[i].name != NULL; i++)
732 if (keywords[i].opcode == code)
733 return(keywords[i].name);
739 * Returns the number of the token pointed to by cp or sBadOption.
743 parse_token(const char *cp, const char *filename,
744 int linenum, u_int *flags)
748 for (i = 0; keywords[i].name; i++)
749 if (strcasecmp(cp, keywords[i].name) == 0) {
750 *flags = keywords[i].flags;
751 return keywords[i].opcode;
754 error("%s: line %d: Bad configuration option: %s",
755 filename, linenum, cp);
760 derelativise_path(const char *path)
762 char *expanded, *ret, cwd[PATH_MAX];
764 if (strcasecmp(path, "none") == 0)
765 return xstrdup("none");
766 expanded = tilde_expand_filename(path, getuid());
767 if (path_absolute(expanded))
769 if (getcwd(cwd, sizeof(cwd)) == NULL)
770 fatal_f("getcwd: %s", strerror(errno));
771 xasprintf(&ret, "%s/%s", cwd, expanded);
777 add_listen_addr(ServerOptions *options, const char *addr,
778 const char *rdomain, int port)
783 add_one_listen_addr(options, addr, rdomain, port);
785 for (i = 0; i < options->num_ports; i++) {
786 add_one_listen_addr(options, addr, rdomain,
793 add_one_listen_addr(ServerOptions *options, const char *addr,
794 const char *rdomain, int port)
796 struct addrinfo hints, *ai, *aitop;
797 char strport[NI_MAXSERV];
801 /* Find listen_addrs entry for this rdomain */
802 for (i = 0; i < options->num_listen_addrs; i++) {
803 if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
805 if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
807 if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
810 if (i >= options->num_listen_addrs) {
811 /* No entry for this rdomain; allocate one */
813 fatal_f("too many listen addresses");
814 options->listen_addrs = xrecallocarray(options->listen_addrs,
815 options->num_listen_addrs, options->num_listen_addrs + 1,
816 sizeof(*options->listen_addrs));
817 i = options->num_listen_addrs++;
819 options->listen_addrs[i].rdomain = xstrdup(rdomain);
821 /* options->listen_addrs[i] points to the addresses for this rdomain */
823 memset(&hints, 0, sizeof(hints));
824 hints.ai_family = options->address_family;
825 hints.ai_socktype = SOCK_STREAM;
826 hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
827 snprintf(strport, sizeof strport, "%d", port);
828 if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
829 fatal("bad addr or host: %s (%s)",
830 addr ? addr : "<NULL>",
831 ssh_gai_strerror(gaierr));
832 for (ai = aitop; ai->ai_next; ai = ai->ai_next)
834 ai->ai_next = options->listen_addrs[i].addrs;
835 options->listen_addrs[i].addrs = aitop;
838 /* Returns nonzero if the routing domain name is valid */
840 valid_rdomain(const char *name)
842 #if defined(HAVE_SYS_VALID_RDOMAIN)
843 return sys_valid_rdomain(name);
844 #elif defined(__OpenBSD__)
847 struct rt_tableinfo info;
849 size_t miblen = sizeof(mib);
854 num = strtonum(name, 0, 255, &errstr);
858 /* Check whether the table actually exists */
859 memset(mib, 0, sizeof(mib));
862 mib[4] = NET_RT_TABLE;
864 if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
868 #else /* defined(__OpenBSD__) */
869 error("Routing domains are not supported on this platform");
875 * Queue a ListenAddress to be processed once we have all of the Ports
876 * and AddressFamily options.
879 queue_listen_addr(ServerOptions *options, const char *addr,
880 const char *rdomain, int port)
882 struct queued_listenaddr *qla;
884 options->queued_listen_addrs = xrecallocarray(
885 options->queued_listen_addrs,
886 options->num_queued_listens, options->num_queued_listens + 1,
887 sizeof(*options->queued_listen_addrs));
888 qla = &options->queued_listen_addrs[options->num_queued_listens++];
889 qla->addr = xstrdup(addr);
891 qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
895 * Process queued (text) ListenAddress entries.
898 process_queued_listen_addrs(ServerOptions *options)
901 struct queued_listenaddr *qla;
903 if (options->num_ports == 0)
904 options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
905 if (options->address_family == -1)
906 options->address_family = AF_UNSPEC;
908 for (i = 0; i < options->num_queued_listens; i++) {
909 qla = &options->queued_listen_addrs[i];
910 add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
914 free(options->queued_listen_addrs);
915 options->queued_listen_addrs = NULL;
916 options->num_queued_listens = 0;
920 * Inform channels layer of permitopen options for a single forwarding
921 * direction (local/remote).
924 process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
925 char **opens, u_int num_opens)
929 char *host, *arg, *oarg;
930 int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
931 const char *what = lookup_opcode_name(opcode);
933 channel_clear_permission(ssh, FORWARD_ADM, where);
935 return; /* permit any */
937 /* handle keywords: "any" / "none" */
938 if (num_opens == 1 && strcmp(opens[0], "any") == 0)
940 if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
941 channel_disable_admin(ssh, where);
944 /* Otherwise treat it as a list of permitted host:port */
945 for (i = 0; i < num_opens; i++) {
946 oarg = arg = xstrdup(opens[i]);
947 host = hpdelim(&arg);
949 fatal_f("missing host in %s", what);
950 host = cleanhostname(host);
951 if (arg == NULL || ((port = permitopen_port(arg)) < 0))
952 fatal_f("bad port number in %s", what);
953 /* Send it to channels layer */
954 channel_add_permission(ssh, FORWARD_ADM,
961 * Inform channels layer of permitopen options from configuration.
964 process_permitopen(struct ssh *ssh, ServerOptions *options)
966 process_permitopen_list(ssh, sPermitOpen,
967 options->permitted_opens, options->num_permitted_opens);
968 process_permitopen_list(ssh, sPermitListen,
969 options->permitted_listens,
970 options->num_permitted_listens);
973 /* Parse a ChannelTimeout clause "pattern=interval" */
975 parse_timeout(const char *s, char **typep, int *secsp)
988 if ((cp = strchr(sdup, '=')) == NULL || cp == sdup) {
993 if ((secs = convtime(cp)) < 0) {
999 *typep = xstrdup(sdup);
1007 process_channel_timeouts(struct ssh *ssh, ServerOptions *options)
1013 debug3_f("setting %u timeouts", options->num_channel_timeouts);
1014 channel_clear_timeouts(ssh);
1015 for (i = 0; i < options->num_channel_timeouts; i++) {
1016 if (parse_timeout(options->channel_timeouts[i],
1017 &type, &secs) != 0) {
1018 fatal_f("internal error: bad timeout %s",
1019 options->channel_timeouts[i]);
1021 channel_add_timeout(ssh, type, secs);
1026 struct connection_info *
1027 get_connection_info(struct ssh *ssh, int populate, int use_dns)
1029 static struct connection_info ci;
1031 if (ssh == NULL || !populate)
1033 ci.host = auth_get_canonical_hostname(ssh, use_dns);
1034 ci.address = ssh_remote_ipaddr(ssh);
1035 ci.laddress = ssh_local_ipaddr(ssh);
1036 ci.lport = ssh_local_port(ssh);
1037 ci.rdomain = ssh_packet_rdomain_in(ssh);
1042 * The strategy for the Match blocks is that the config file is parsed twice.
1044 * The first time is at startup. activep is initialized to 1 and the
1045 * directives in the global context are processed and acted on. Hitting a
1046 * Match directive unsets activep and the directives inside the block are
1047 * checked for syntax only.
1049 * The second time is after a connection has been established but before
1050 * authentication. activep is initialized to 2 and global config directives
1051 * are ignored since they have already been processed. If the criteria in a
1052 * Match block is met, activep is set and the subsequent directives
1053 * processed and actioned until EOF or another Match block unsets it. Any
1054 * options set are copied into the main server config.
1056 * Potential additions/improvements:
1057 * - Add Match support for pre-kex directives, eg. Ciphers.
1059 * - Add a Tag directive (idea from David Leonard) ala pf, eg:
1060 * Match Address 192.168.0.*
1065 * AllowTcpForwarding yes
1066 * GatewayPorts clientspecified
1069 * - Add a PermittedChannelRequests directive
1071 * PermittedChannelRequests session,forwarded-tcpip
1075 match_cfg_line_group(const char *grps, int line, const char *user)
1083 if ((pw = getpwnam(user)) == NULL) {
1084 debug("Can't match group at line %d because user %.100s does "
1085 "not exist", line, user);
1086 } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
1087 debug("Can't Match group because user %.100s not in any group "
1088 "at line %d", user, line);
1089 } else if (ga_match_pattern_list(grps) != 1) {
1090 debug("user %.100s does not match group list %.100s at line %d",
1093 debug("user %.100s matched group list %.100s at line %d", user,
1103 match_test_missing_fatal(const char *criteria, const char *attrib)
1105 fatal("'Match %s' in configuration but '%s' not in connection "
1106 "test specification.", criteria, attrib);
1110 * All of the attributes on a single Match line are ANDed together, so we need
1111 * to check every attribute and set the result to zero if any attribute does
1115 match_cfg_line(char **condition, int line, struct connection_info *ci)
1117 int result = 1, attributes = 0, port;
1118 char *arg, *attrib, *cp = *condition;
1121 debug3("checking syntax for 'Match %s'", cp);
1123 debug3("checking match for '%s' user %s host %s addr %s "
1124 "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
1125 ci->host ? ci->host : "(null)",
1126 ci->address ? ci->address : "(null)",
1127 ci->laddress ? ci->laddress : "(null)", ci->lport);
1129 while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1130 /* Terminate on comment */
1131 if (*attrib == '#') {
1132 cp = NULL; /* mark all arguments consumed */
1137 /* Criterion "all" has no argument and must appear alone */
1138 if (strcasecmp(attrib, "all") == 0) {
1139 if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
1140 *arg != '\0' && *arg != '#')) {
1141 error("'all' cannot be combined with other "
1142 "Match attributes");
1145 if (arg != NULL && *arg == '#')
1146 cp = NULL; /* mark all arguments consumed */
1150 /* All other criteria require an argument */
1151 if ((arg = strdelim(&cp)) == NULL ||
1152 *arg == '\0' || *arg == '#') {
1153 error("Missing Match criteria for %s", attrib);
1156 if (strcasecmp(attrib, "user") == 0) {
1157 if (ci == NULL || (ci->test && ci->user == NULL)) {
1161 if (ci->user == NULL)
1162 match_test_missing_fatal("User", "user");
1163 if (match_usergroup_pattern_list(ci->user, arg) != 1)
1166 debug("user %.100s matched 'User %.100s' at "
1167 "line %d", ci->user, arg, line);
1168 } else if (strcasecmp(attrib, "group") == 0) {
1169 if (ci == NULL || (ci->test && ci->user == NULL)) {
1173 if (ci->user == NULL)
1174 match_test_missing_fatal("Group", "user");
1175 switch (match_cfg_line_group(arg, line, ci->user)) {
1181 } else if (strcasecmp(attrib, "host") == 0) {
1182 if (ci == NULL || (ci->test && ci->host == NULL)) {
1186 if (ci->host == NULL)
1187 match_test_missing_fatal("Host", "host");
1188 if (match_hostname(ci->host, arg) != 1)
1191 debug("connection from %.100s matched 'Host "
1192 "%.100s' at line %d", ci->host, arg, line);
1193 } else if (strcasecmp(attrib, "address") == 0) {
1194 if (ci == NULL || (ci->test && ci->address == NULL)) {
1195 if (addr_match_list(NULL, arg) != 0)
1196 fatal("Invalid Match address argument "
1197 "'%s' at line %d", arg, line);
1201 if (ci->address == NULL)
1202 match_test_missing_fatal("Address", "addr");
1203 switch (addr_match_list(ci->address, arg)) {
1205 debug("connection from %.100s matched 'Address "
1206 "%.100s' at line %d", ci->address, arg, line);
1215 } else if (strcasecmp(attrib, "localaddress") == 0){
1216 if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1217 if (addr_match_list(NULL, arg) != 0)
1218 fatal("Invalid Match localaddress "
1219 "argument '%s' at line %d", arg,
1224 if (ci->laddress == NULL)
1225 match_test_missing_fatal("LocalAddress",
1227 switch (addr_match_list(ci->laddress, arg)) {
1229 debug("connection from %.100s matched "
1230 "'LocalAddress %.100s' at line %d",
1231 ci->laddress, arg, line);
1240 } else if (strcasecmp(attrib, "localport") == 0) {
1241 if ((port = a2port(arg)) == -1) {
1242 error("Invalid LocalPort '%s' on Match line",
1246 if (ci == NULL || (ci->test && ci->lport == -1)) {
1251 match_test_missing_fatal("LocalPort", "lport");
1252 /* TODO support port lists */
1253 if (port == ci->lport)
1254 debug("connection from %.100s matched "
1255 "'LocalPort %d' at line %d",
1256 ci->laddress, port, line);
1259 } else if (strcasecmp(attrib, "rdomain") == 0) {
1260 if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1264 if (ci->rdomain == NULL)
1265 match_test_missing_fatal("RDomain", "rdomain");
1266 if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1269 debug("user %.100s matched 'RDomain %.100s' at "
1270 "line %d", ci->rdomain, arg, line);
1272 error("Unsupported Match attribute %s", attrib);
1276 if (attributes == 0) {
1277 error("One or more attributes required for Match");
1281 debug3("match %sfound", result ? "" : "not ");
1286 #define WHITESPACE " \t\r\n"
1288 /* Multistate option parsing */
1293 static const struct multistate multistate_flag[] = {
1298 static const struct multistate multistate_ignore_rhosts[] = {
1299 { "yes", IGNORE_RHOSTS_YES },
1300 { "no", IGNORE_RHOSTS_NO },
1301 { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1304 static const struct multistate multistate_addressfamily[] = {
1305 { "inet", AF_INET },
1306 { "inet6", AF_INET6 },
1307 { "any", AF_UNSPEC },
1310 static const struct multistate multistate_permitrootlogin[] = {
1311 { "without-password", PERMIT_NO_PASSWD },
1312 { "prohibit-password", PERMIT_NO_PASSWD },
1313 { "forced-commands-only", PERMIT_FORCED_ONLY },
1314 { "yes", PERMIT_YES },
1315 { "no", PERMIT_NO },
1318 static const struct multistate multistate_compression[] = {
1320 { "yes", COMP_DELAYED },
1321 { "delayed", COMP_DELAYED },
1323 { "no", COMP_NONE },
1326 static const struct multistate multistate_gatewayports[] = {
1327 { "clientspecified", 2 },
1332 static const struct multistate multistate_tcpfwd[] = {
1333 { "yes", FORWARD_ALLOW },
1334 { "all", FORWARD_ALLOW },
1335 { "no", FORWARD_DENY },
1336 { "remote", FORWARD_REMOTE },
1337 { "local", FORWARD_LOCAL },
1342 process_server_config_line_depth(ServerOptions *options, char *line,
1343 const char *filename, int linenum, int *activep,
1344 struct connection_info *connectinfo, int *inc_flags, int depth,
1345 struct include_list *includes)
1347 char *str, ***chararrayptr, **charptr, *arg, *arg2, *p, *keyword;
1348 int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1350 SyslogFacility *log_facility_ptr;
1351 LogLevel *log_level_ptr;
1352 ServerOpCodes opcode;
1353 u_int i, *uintptr, uvalue, flags = 0;
1356 const struct multistate *multistate_ptr;
1358 struct include_item *item;
1360 char **oav = NULL, **av;
1364 /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1365 if ((len = strlen(line)) == 0)
1367 for (len--; len > 0; len--) {
1368 if (strchr(WHITESPACE "\f", line[len]) == NULL)
1374 if ((keyword = strdelim(&str)) == NULL)
1376 /* Ignore leading whitespace */
1377 if (*keyword == '\0')
1378 keyword = strdelim(&str);
1379 if (!keyword || !*keyword || *keyword == '#')
1381 if (str == NULL || *str == '\0') {
1382 error("%s line %d: no argument after keyword \"%s\"",
1383 filename, linenum, keyword);
1388 opcode = parse_token(keyword, filename, linenum, &flags);
1390 if (argv_split(str, &oac, &oav, 1) != 0) {
1391 error("%s line %d: invalid quotes", filename, linenum);
1397 if (activep == NULL) { /* We are processing a command line directive */
1401 if (*activep && opcode != sMatch && opcode != sInclude)
1402 debug3("%s:%d setting %s %s", filename, linenum, keyword, str);
1403 if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1404 if (connectinfo == NULL) {
1405 fatal("%s line %d: Directive '%s' is not allowed "
1406 "within a Match block", filename, linenum, keyword);
1407 } else { /* this is a directive we have already processed */
1414 /* Portable-specific options */
1416 intptr = &options->use_pam;
1419 /* Standard Options */
1423 /* ignore ports from configfile if cmdline specifies ports */
1424 if (options->ports_from_cmdline) {
1428 if (options->num_ports >= MAX_PORTS)
1429 fatal("%s line %d: too many ports.",
1431 arg = argv_next(&ac, &av);
1432 if (!arg || *arg == '\0')
1433 fatal("%s line %d: missing port number.",
1435 options->ports[options->num_ports++] = a2port(arg);
1436 if (options->ports[options->num_ports-1] <= 0)
1437 fatal("%s line %d: Badly formatted port number.",
1441 case sLoginGraceTime:
1442 intptr = &options->login_grace_time;
1444 arg = argv_next(&ac, &av);
1445 if (!arg || *arg == '\0')
1446 fatal("%s line %d: missing time value.",
1448 if ((value = convtime(arg)) == -1)
1449 fatal("%s line %d: invalid time value.",
1451 if (*activep && *intptr == -1)
1455 case sListenAddress:
1456 arg = argv_next(&ac, &av);
1457 if (arg == NULL || *arg == '\0')
1458 fatal("%s line %d: missing address",
1460 /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1461 if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1462 && strchr(p+1, ':') != NULL) {
1469 fatal("%s line %d: bad address:port usage",
1471 p = cleanhostname(p);
1474 else if ((port = a2port(arg)) <= 0)
1475 fatal("%s line %d: bad port number",
1478 /* Optional routing table */
1480 if ((arg = argv_next(&ac, &av)) != NULL) {
1481 if (strcmp(arg, "rdomain") != 0 ||
1482 (arg2 = argv_next(&ac, &av)) == NULL)
1483 fatal("%s line %d: bad ListenAddress syntax",
1485 if (!valid_rdomain(arg2))
1486 fatal("%s line %d: bad routing domain",
1489 queue_listen_addr(options, p, arg2, port);
1493 case sAddressFamily:
1494 intptr = &options->address_family;
1495 multistate_ptr = multistate_addressfamily;
1497 arg = argv_next(&ac, &av);
1498 if (!arg || *arg == '\0')
1499 fatal("%s line %d: missing argument.",
1502 for (i = 0; multistate_ptr[i].key != NULL; i++) {
1503 if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1504 value = multistate_ptr[i].value;
1509 fatal("%s line %d: unsupported option \"%s\".",
1510 filename, linenum, arg);
1511 if (*activep && *intptr == -1)
1516 arg = argv_next(&ac, &av);
1517 if (!arg || *arg == '\0')
1518 fatal("%s line %d: missing file name.",
1521 servconf_add_hostkey(filename, linenum,
1527 charptr = &options->host_key_agent;
1528 arg = argv_next(&ac, &av);
1529 if (!arg || *arg == '\0')
1530 fatal("%s line %d: missing socket name.",
1532 if (*activep && *charptr == NULL)
1533 *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1534 xstrdup(arg) : derelativise_path(arg);
1537 case sHostCertificate:
1538 arg = argv_next(&ac, &av);
1539 if (!arg || *arg == '\0')
1540 fatal("%s line %d: missing file name.",
1543 servconf_add_hostcert(filename, linenum, options, arg);
1547 charptr = &options->pid_file;
1549 arg = argv_next(&ac, &av);
1550 if (!arg || *arg == '\0')
1551 fatal("%s line %d: missing file name.",
1553 if (*activep && *charptr == NULL) {
1554 *charptr = derelativise_path(arg);
1555 /* increase optional counter */
1557 *intptr = *intptr + 1;
1562 charptr = &options->moduli_file;
1563 goto parse_filename;
1565 case sPermitRootLogin:
1566 intptr = &options->permit_root_login;
1567 multistate_ptr = multistate_permitrootlogin;
1568 goto parse_multistate;
1571 intptr = &options->ignore_rhosts;
1572 multistate_ptr = multistate_ignore_rhosts;
1573 goto parse_multistate;
1575 case sIgnoreUserKnownHosts:
1576 intptr = &options->ignore_user_known_hosts;
1578 multistate_ptr = multistate_flag;
1579 goto parse_multistate;
1581 case sHostbasedAuthentication:
1582 intptr = &options->hostbased_authentication;
1585 case sHostbasedUsesNameFromPacketOnly:
1586 intptr = &options->hostbased_uses_name_from_packet_only;
1589 case sHostbasedAcceptedAlgorithms:
1590 charptr = &options->hostbased_accepted_algos;
1593 arg = argv_next(&ac, &av);
1594 if (!arg || *arg == '\0')
1595 fatal("%s line %d: Missing argument.",
1598 !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1599 arg + 1 : arg, 1, ca_only))
1600 fatal("%s line %d: Bad key types '%s'.",
1601 filename, linenum, arg ? arg : "<NONE>");
1602 if (*activep && *charptr == NULL)
1603 *charptr = xstrdup(arg);
1606 case sHostKeyAlgorithms:
1607 charptr = &options->hostkeyalgorithms;
1609 goto parse_pubkey_algos;
1611 case sCASignatureAlgorithms:
1612 charptr = &options->ca_sign_algorithms;
1614 goto parse_pubkey_algos;
1616 case sPubkeyAuthentication:
1617 intptr = &options->pubkey_authentication;
1621 case sPubkeyAcceptedAlgorithms:
1622 charptr = &options->pubkey_accepted_algos;
1624 goto parse_pubkey_algos;
1626 case sPubkeyAuthOptions:
1627 intptr = &options->pubkey_auth_options;
1629 while ((arg = argv_next(&ac, &av)) != NULL) {
1630 if (strcasecmp(arg, "none") == 0)
1632 if (strcasecmp(arg, "touch-required") == 0)
1633 value |= PUBKEYAUTH_TOUCH_REQUIRED;
1634 else if (strcasecmp(arg, "verify-required") == 0)
1635 value |= PUBKEYAUTH_VERIFY_REQUIRED;
1637 error("%s line %d: unsupported %s option %s",
1638 filename, linenum, keyword, arg);
1642 if (*activep && *intptr == -1)
1646 case sKerberosAuthentication:
1647 intptr = &options->kerberos_authentication;
1650 case sKerberosOrLocalPasswd:
1651 intptr = &options->kerberos_or_local_passwd;
1654 case sKerberosTicketCleanup:
1655 intptr = &options->kerberos_ticket_cleanup;
1658 case sKerberosGetAFSToken:
1659 intptr = &options->kerberos_get_afs_token;
1662 case sGssAuthentication:
1663 intptr = &options->gss_authentication;
1666 case sGssCleanupCreds:
1667 intptr = &options->gss_cleanup_creds;
1670 case sGssStrictAcceptor:
1671 intptr = &options->gss_strict_acceptor;
1674 case sPasswordAuthentication:
1675 intptr = &options->password_authentication;
1678 case sKbdInteractiveAuthentication:
1679 intptr = &options->kbd_interactive_authentication;
1683 intptr = &options->print_motd;
1687 intptr = &options->print_lastlog;
1690 case sX11Forwarding:
1691 intptr = &options->x11_forwarding;
1694 case sX11DisplayOffset:
1695 intptr = &options->x11_display_offset;
1697 arg = argv_next(&ac, &av);
1698 if ((errstr = atoi_err(arg, &value)) != NULL)
1699 fatal("%s line %d: %s integer value %s.",
1700 filename, linenum, keyword, errstr);
1701 if (*activep && *intptr == -1)
1705 case sX11UseLocalhost:
1706 intptr = &options->x11_use_localhost;
1709 case sXAuthLocation:
1710 charptr = &options->xauth_location;
1711 goto parse_filename;
1714 intptr = &options->permit_tty;
1718 intptr = &options->permit_user_rc;
1722 intptr = &options->strict_modes;
1726 intptr = &options->tcp_keep_alive;
1730 intptr = &options->permit_empty_passwd;
1733 case sPermitUserEnvironment:
1734 intptr = &options->permit_user_env;
1735 charptr = &options->permit_user_env_allowlist;
1736 arg = argv_next(&ac, &av);
1737 if (!arg || *arg == '\0')
1738 fatal("%s line %d: %s missing argument.",
1739 filename, linenum, keyword);
1742 if (strcmp(arg, "yes") == 0)
1744 else if (strcmp(arg, "no") == 0)
1747 /* Pattern-list specified */
1751 if (*activep && *intptr == -1) {
1760 intptr = &options->compression;
1761 multistate_ptr = multistate_compression;
1762 goto parse_multistate;
1765 arg = argv_next(&ac, &av);
1766 if (!arg || *arg == '\0')
1767 fatal("%s line %d: %s missing argument.",
1768 filename, linenum, keyword);
1769 if (strcmp(arg, "default") == 0) {
1772 if (scan_scaled(arg, &val64) == -1)
1773 fatal("%.200s line %d: Bad %s number '%s': %s",
1774 filename, linenum, keyword,
1775 arg, strerror(errno));
1776 if (val64 != 0 && val64 < 16)
1777 fatal("%.200s line %d: %s too small",
1778 filename, linenum, keyword);
1780 if (*activep && options->rekey_limit == -1)
1781 options->rekey_limit = val64;
1782 if (ac != 0) { /* optional rekey interval present */
1783 if (strcmp(av[0], "none") == 0) {
1784 (void)argv_next(&ac, &av); /* discard */
1787 intptr = &options->rekey_interval;
1793 intptr = &options->fwd_opts.gateway_ports;
1794 multistate_ptr = multistate_gatewayports;
1795 goto parse_multistate;
1798 intptr = &options->use_dns;
1802 log_facility_ptr = &options->log_facility;
1803 arg = argv_next(&ac, &av);
1804 value = log_facility_number(arg);
1805 if (value == SYSLOG_FACILITY_NOT_SET)
1806 fatal("%.200s line %d: unsupported log facility '%s'",
1807 filename, linenum, arg ? arg : "<NONE>");
1808 if (*log_facility_ptr == -1)
1809 *log_facility_ptr = (SyslogFacility) value;
1813 log_level_ptr = &options->log_level;
1814 arg = argv_next(&ac, &av);
1815 value = log_level_number(arg);
1816 if (value == SYSLOG_LEVEL_NOT_SET)
1817 fatal("%.200s line %d: unsupported log level '%s'",
1818 filename, linenum, arg ? arg : "<NONE>");
1819 if (*activep && *log_level_ptr == -1)
1820 *log_level_ptr = (LogLevel) value;
1824 found = options->num_log_verbose == 0;
1826 while ((arg = argv_next(&ac, &av)) != NULL) {
1828 error("%s line %d: keyword %s empty argument",
1829 filename, linenum, keyword);
1832 /* Allow "none" only in first position */
1833 if (strcasecmp(arg, "none") == 0) {
1834 if (i > 0 || ac > 0) {
1835 error("%s line %d: keyword %s \"none\" "
1836 "argument must appear alone.",
1837 filename, linenum, keyword);
1842 if (!found || !*activep)
1844 opt_array_append(filename, linenum, keyword,
1845 &options->log_verbose, &options->num_log_verbose,
1850 case sAllowTcpForwarding:
1851 intptr = &options->allow_tcp_forwarding;
1852 multistate_ptr = multistate_tcpfwd;
1853 goto parse_multistate;
1855 case sAllowStreamLocalForwarding:
1856 intptr = &options->allow_streamlocal_forwarding;
1857 multistate_ptr = multistate_tcpfwd;
1858 goto parse_multistate;
1860 case sAllowAgentForwarding:
1861 intptr = &options->allow_agent_forwarding;
1864 case sDisableForwarding:
1865 intptr = &options->disable_forwarding;
1869 chararrayptr = &options->allow_users;
1870 uintptr = &options->num_allow_users;
1871 parse_allowdenyusers:
1872 while ((arg = argv_next(&ac, &av)) != NULL) {
1874 match_user(NULL, NULL, NULL, arg) == -1)
1875 fatal("%s line %d: invalid %s pattern: \"%s\"",
1876 filename, linenum, keyword, arg);
1879 opt_array_append(filename, linenum, keyword,
1880 chararrayptr, uintptr, arg);
1885 chararrayptr = &options->deny_users;
1886 uintptr = &options->num_deny_users;
1887 goto parse_allowdenyusers;
1890 chararrayptr = &options->allow_groups;
1891 uintptr = &options->num_allow_groups;
1892 parse_allowdenygroups:
1893 while ((arg = argv_next(&ac, &av)) != NULL) {
1895 fatal("%s line %d: empty %s pattern",
1896 filename, linenum, keyword);
1899 opt_array_append(filename, linenum, keyword,
1900 chararrayptr, uintptr, arg);
1905 chararrayptr = &options->deny_groups;
1906 uintptr = &options->num_deny_groups;
1907 goto parse_allowdenygroups;
1910 arg = argv_next(&ac, &av);
1911 if (!arg || *arg == '\0')
1912 fatal("%s line %d: %s missing argument.",
1913 filename, linenum, keyword);
1915 !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1916 fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1917 filename, linenum, arg ? arg : "<NONE>");
1918 if (options->ciphers == NULL)
1919 options->ciphers = xstrdup(arg);
1923 arg = argv_next(&ac, &av);
1924 if (!arg || *arg == '\0')
1925 fatal("%s line %d: %s missing argument.",
1926 filename, linenum, keyword);
1928 !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1929 fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1930 filename, linenum, arg ? arg : "<NONE>");
1931 if (options->macs == NULL)
1932 options->macs = xstrdup(arg);
1935 case sKexAlgorithms:
1936 arg = argv_next(&ac, &av);
1937 if (!arg || *arg == '\0')
1938 fatal("%s line %d: %s missing argument.",
1939 filename, linenum, keyword);
1941 !kex_names_valid(*arg == '+' || *arg == '^' ?
1943 fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1944 filename, linenum, arg ? arg : "<NONE>");
1945 if (options->kex_algorithms == NULL)
1946 options->kex_algorithms = xstrdup(arg);
1950 arg = argv_next(&ac, &av);
1951 if (!arg || *arg == '\0')
1952 fatal("%s line %d: %s missing argument.",
1953 filename, linenum, keyword);
1959 for (i = 0; i < options->num_subsystems; i++) {
1960 if (strcmp(arg, options->subsystem_name[i]) == 0) {
1966 debug("%s line %d: Subsystem '%s' already defined.",
1967 filename, linenum, arg);
1971 options->subsystem_name = xrecallocarray(
1972 options->subsystem_name, options->num_subsystems,
1973 options->num_subsystems + 1,
1974 sizeof(*options->subsystem_name));
1975 options->subsystem_command = xrecallocarray(
1976 options->subsystem_command, options->num_subsystems,
1977 options->num_subsystems + 1,
1978 sizeof(*options->subsystem_command));
1979 options->subsystem_args = xrecallocarray(
1980 options->subsystem_args, options->num_subsystems,
1981 options->num_subsystems + 1,
1982 sizeof(*options->subsystem_args));
1983 options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1984 arg = argv_next(&ac, &av);
1985 if (!arg || *arg == '\0') {
1986 fatal("%s line %d: Missing subsystem command.",
1989 options->subsystem_command[options->num_subsystems] =
1991 /* Collect arguments (separate to executable) */
1992 arg = argv_assemble(1, &arg); /* quote command correctly */
1993 arg2 = argv_assemble(ac, av); /* rest of command */
1994 xasprintf(&options->subsystem_args[options->num_subsystems],
1995 "%s %s", arg, arg2);
1998 options->num_subsystems++;
2002 arg = argv_next(&ac, &av);
2003 if (!arg || *arg == '\0')
2004 fatal("%s line %d: %s missing argument.",
2005 filename, linenum, keyword);
2006 if ((n = sscanf(arg, "%d:%d:%d",
2007 &options->max_startups_begin,
2008 &options->max_startups_rate,
2009 &options->max_startups)) == 3) {
2010 if (options->max_startups_begin >
2011 options->max_startups ||
2012 options->max_startups_rate > 100 ||
2013 options->max_startups_rate < 1)
2014 fatal("%s line %d: Invalid %s spec.",
2015 filename, linenum, keyword);
2017 fatal("%s line %d: Invalid %s spec.",
2018 filename, linenum, keyword);
2020 options->max_startups = options->max_startups_begin;
2021 if (options->max_startups <= 0 ||
2022 options->max_startups_begin <= 0)
2023 fatal("%s line %d: Invalid %s spec.",
2024 filename, linenum, keyword);
2027 case sPerSourceNetBlockSize:
2028 arg = argv_next(&ac, &av);
2029 if (!arg || *arg == '\0')
2030 fatal("%s line %d: %s missing argument.",
2031 filename, linenum, keyword);
2032 switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
2034 if (value2 < 0 || value2 > 128)
2038 if (value < 0 || value > 32)
2041 if (n != 1 && n != 2)
2042 fatal("%s line %d: Invalid %s spec.",
2043 filename, linenum, keyword);
2045 options->per_source_masklen_ipv4 = value;
2046 options->per_source_masklen_ipv6 = value2;
2050 case sPerSourceMaxStartups:
2051 arg = argv_next(&ac, &av);
2052 if (!arg || *arg == '\0')
2053 fatal("%s line %d: %s missing argument.",
2054 filename, linenum, keyword);
2055 if (strcmp(arg, "none") == 0) { /* no limit */
2058 if ((errstr = atoi_err(arg, &value)) != NULL)
2059 fatal("%s line %d: %s integer value %s.",
2060 filename, linenum, keyword, errstr);
2062 if (*activep && options->per_source_max_startups == -1)
2063 options->per_source_max_startups = value;
2067 intptr = &options->max_authtries;
2071 intptr = &options->max_sessions;
2075 charptr = &options->banner;
2076 goto parse_filename;
2079 * These options can contain %X options expanded at
2080 * connect time, so that you can specify paths like:
2082 * AuthorizedKeysFile /etc/ssh_keys/%u
2084 case sAuthorizedKeysFile:
2085 uvalue = options->num_authkeys_files;
2086 while ((arg = argv_next(&ac, &av)) != NULL) {
2088 error("%s line %d: keyword %s empty argument",
2089 filename, linenum, keyword);
2092 arg2 = tilde_expand_filename(arg, getuid());
2093 if (*activep && uvalue == 0) {
2094 opt_array_append(filename, linenum, keyword,
2095 &options->authorized_keys_files,
2096 &options->num_authkeys_files, arg2);
2102 case sAuthorizedPrincipalsFile:
2103 charptr = &options->authorized_principals_file;
2104 arg = argv_next(&ac, &av);
2105 if (!arg || *arg == '\0')
2106 fatal("%s line %d: %s missing argument.",
2107 filename, linenum, keyword);
2108 if (*activep && *charptr == NULL) {
2109 *charptr = tilde_expand_filename(arg, getuid());
2110 /* increase optional counter */
2112 *intptr = *intptr + 1;
2116 case sClientAliveInterval:
2117 intptr = &options->client_alive_interval;
2120 case sClientAliveCountMax:
2121 intptr = &options->client_alive_count_max;
2125 while ((arg = argv_next(&ac, &av)) != NULL) {
2126 if (*arg == '\0' || strchr(arg, '=') != NULL)
2127 fatal("%s line %d: Invalid environment name.",
2131 opt_array_append(filename, linenum, keyword,
2132 &options->accept_env, &options->num_accept_env,
2138 uvalue = options->num_setenv;
2139 while ((arg = argv_next(&ac, &av)) != NULL) {
2140 if (*arg == '\0' || strchr(arg, '=') == NULL)
2141 fatal("%s line %d: Invalid environment.",
2143 if (!*activep || uvalue != 0)
2145 if (lookup_setenv_in_list(arg, options->setenv,
2146 options->num_setenv) != NULL) {
2147 debug2("%s line %d: ignoring duplicate env "
2148 "name \"%.64s\"", filename, linenum, arg);
2151 opt_array_append(filename, linenum, keyword,
2152 &options->setenv, &options->num_setenv, arg);
2157 intptr = &options->permit_tun;
2158 arg = argv_next(&ac, &av);
2159 if (!arg || *arg == '\0')
2160 fatal("%s line %d: %s missing argument.",
2161 filename, linenum, keyword);
2163 for (i = 0; tunmode_desc[i].val != -1; i++)
2164 if (strcmp(tunmode_desc[i].text, arg) == 0) {
2165 value = tunmode_desc[i].val;
2169 fatal("%s line %d: bad %s argument %s",
2170 filename, linenum, keyword, arg);
2171 if (*activep && *intptr == -1)
2177 fatal("Include directive not supported as a "
2178 "command-line option");
2181 while ((arg2 = argv_next(&ac, &av)) != NULL) {
2182 if (*arg2 == '\0') {
2183 error("%s line %d: keyword %s empty argument",
2184 filename, linenum, keyword);
2189 if (*arg2 != '/' && *arg2 != '~') {
2190 xasprintf(&arg, "%s/%s", SSHDIR, arg2);
2192 arg = xstrdup(arg2);
2195 * Don't let included files clobber the containing
2196 * file's Match state.
2200 /* consult cache of include files */
2201 TAILQ_FOREACH(item, includes, entry) {
2202 if (strcmp(item->selector, arg) != 0)
2204 if (item->filename != NULL) {
2205 parse_server_config_depth(options,
2206 item->filename, item->contents,
2207 includes, connectinfo,
2208 (*inc_flags & SSHCFG_MATCH_ONLY
2209 ? SSHCFG_MATCH_ONLY : (oactive
2210 ? 0 : SSHCFG_NEVERMATCH)),
2211 activep, depth + 1);
2221 /* requested glob was not in cache */
2222 debug2("%s line %d: new include %s",
2223 filename, linenum, arg);
2224 if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
2225 if (r != GLOB_NOMATCH) {
2226 fatal("%s line %d: include \"%s\" glob "
2227 "failed", filename, linenum, arg);
2230 * If no entry matched then record a
2231 * placeholder to skip later glob calls.
2233 debug2("%s line %d: no match for %s",
2234 filename, linenum, arg);
2235 item = xcalloc(1, sizeof(*item));
2236 item->selector = strdup(arg);
2237 TAILQ_INSERT_TAIL(includes,
2240 if (gbuf.gl_pathc > INT_MAX)
2241 fatal_f("too many glob results");
2242 for (n = 0; n < (int)gbuf.gl_pathc; n++) {
2243 debug2("%s line %d: including %s",
2244 filename, linenum, gbuf.gl_pathv[n]);
2245 item = xcalloc(1, sizeof(*item));
2246 item->selector = strdup(arg);
2247 item->filename = strdup(gbuf.gl_pathv[n]);
2248 if ((item->contents = sshbuf_new()) == NULL)
2249 fatal_f("sshbuf_new failed");
2250 load_server_config(item->filename,
2252 parse_server_config_depth(options,
2253 item->filename, item->contents,
2254 includes, connectinfo,
2255 (*inc_flags & SSHCFG_MATCH_ONLY
2256 ? SSHCFG_MATCH_ONLY : (oactive
2257 ? 0 : SSHCFG_NEVERMATCH)),
2258 activep, depth + 1);
2260 TAILQ_INSERT_TAIL(includes, item, entry);
2266 fatal("%s line %d: %s missing filename argument",
2267 filename, linenum, keyword);
2273 fatal("Match directive not supported as a command-line "
2275 value = match_cfg_line(&str, linenum,
2276 (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
2278 fatal("%s line %d: Bad Match condition", filename,
2280 *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
2282 * The MATCH_ONLY flag is applicable only until the first
2285 *inc_flags &= ~SSHCFG_MATCH_ONLY;
2287 * If match_cfg_line() didn't consume all its arguments then
2288 * arrange for the extra arguments check below to fail.
2290 if (str == NULL || *str == '\0')
2296 if (opcode == sPermitListen) {
2297 uintptr = &options->num_permitted_listens;
2298 chararrayptr = &options->permitted_listens;
2300 uintptr = &options->num_permitted_opens;
2301 chararrayptr = &options->permitted_opens;
2303 arg = argv_next(&ac, &av);
2304 if (!arg || *arg == '\0')
2305 fatal("%s line %d: %s missing argument.",
2306 filename, linenum, keyword);
2307 uvalue = *uintptr; /* modified later */
2308 if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
2309 if (*activep && uvalue == 0) {
2311 *chararrayptr = xcalloc(1,
2312 sizeof(**chararrayptr));
2313 (*chararrayptr)[0] = xstrdup(arg);
2317 for (; arg != NULL && *arg != '\0'; arg = argv_next(&ac, &av)) {
2318 if (opcode == sPermitListen &&
2319 strchr(arg, ':') == NULL) {
2321 * Allow bare port number for PermitListen
2322 * to indicate a wildcard listen host.
2324 xasprintf(&arg2, "*:%s", arg);
2326 arg2 = xstrdup(arg);
2329 fatal("%s line %d: %s missing host",
2330 filename, linenum, keyword);
2332 p = cleanhostname(p);
2335 ((port = permitopen_port(arg)) < 0)) {
2336 fatal("%s line %d: %s bad port number",
2337 filename, linenum, keyword);
2339 if (*activep && uvalue == 0) {
2340 opt_array_append(filename, linenum, keyword,
2341 chararrayptr, uintptr, arg2);
2348 if (str == NULL || *str == '\0')
2349 fatal("%s line %d: %s missing argument.",
2350 filename, linenum, keyword);
2351 len = strspn(str, WHITESPACE);
2352 if (*activep && options->adm_forced_command == NULL)
2353 options->adm_forced_command = xstrdup(str + len);
2357 case sChrootDirectory:
2358 charptr = &options->chroot_directory;
2360 arg = argv_next(&ac, &av);
2361 if (!arg || *arg == '\0')
2362 fatal("%s line %d: %s missing argument.",
2363 filename, linenum, keyword);
2364 if (*activep && *charptr == NULL)
2365 *charptr = xstrdup(arg);
2368 case sTrustedUserCAKeys:
2369 charptr = &options->trusted_user_ca_keys;
2370 goto parse_filename;
2373 charptr = &options->revoked_keys_file;
2374 goto parse_filename;
2376 case sSecurityKeyProvider:
2377 charptr = &options->sk_provider;
2378 arg = argv_next(&ac, &av);
2379 if (!arg || *arg == '\0')
2380 fatal("%s line %d: %s missing argument.",
2381 filename, linenum, keyword);
2382 if (*activep && *charptr == NULL) {
2383 *charptr = strcasecmp(arg, "internal") == 0 ?
2384 xstrdup(arg) : derelativise_path(arg);
2385 /* increase optional counter */
2387 *intptr = *intptr + 1;
2392 arg = argv_next(&ac, &av);
2393 if (!arg || *arg == '\0')
2394 fatal("%s line %d: %s missing argument.",
2395 filename, linenum, keyword);
2396 if ((value = parse_ipqos(arg)) == -1)
2397 fatal("%s line %d: Bad %s value: %s",
2398 filename, linenum, keyword, arg);
2399 arg = argv_next(&ac, &av);
2402 else if ((value2 = parse_ipqos(arg)) == -1)
2403 fatal("%s line %d: Bad %s value: %s",
2404 filename, linenum, keyword, arg);
2406 options->ip_qos_interactive = value;
2407 options->ip_qos_bulk = value2;
2411 case sVersionAddendum:
2412 if (str == NULL || *str == '\0')
2413 fatal("%s line %d: %s missing argument.",
2414 filename, linenum, keyword);
2415 len = strspn(str, WHITESPACE);
2416 if (strchr(str + len, '\r') != NULL) {
2417 fatal("%.200s line %d: Invalid %s argument",
2418 filename, linenum, keyword);
2420 if ((arg = strchr(line, '#')) != NULL) {
2424 if (*activep && options->version_addendum == NULL) {
2425 if (strcasecmp(str + len, "none") == 0)
2426 options->version_addendum = xstrdup("");
2428 options->version_addendum = xstrdup(str + len);
2433 case sAuthorizedKeysCommand:
2434 charptr = &options->authorized_keys_command;
2436 len = strspn(str, WHITESPACE);
2437 if (str[len] != '/' && strcasecmp(str + len, "none") != 0) {
2438 fatal("%.200s line %d: %s must be an absolute path",
2439 filename, linenum, keyword);
2441 if (*activep && *charptr == NULL)
2442 *charptr = xstrdup(str + len);
2446 case sAuthorizedKeysCommandUser:
2447 charptr = &options->authorized_keys_command_user;
2449 arg = argv_next(&ac, &av);
2450 if (!arg || *arg == '\0') {
2451 fatal("%s line %d: missing %s argument.",
2452 filename, linenum, keyword);
2454 if (*activep && *charptr == NULL)
2455 *charptr = xstrdup(arg);
2458 case sAuthorizedPrincipalsCommand:
2459 charptr = &options->authorized_principals_command;
2462 case sAuthorizedPrincipalsCommandUser:
2463 charptr = &options->authorized_principals_command_user;
2464 goto parse_localuser;
2466 case sAuthenticationMethods:
2467 found = options->num_auth_methods == 0;
2468 value = 0; /* seen "any" pseudo-method */
2469 value2 = 0; /* successfully parsed any method */
2470 while ((arg = argv_next(&ac, &av)) != NULL) {
2471 if (strcmp(arg, "any") == 0) {
2472 if (options->num_auth_methods > 0) {
2473 fatal("%s line %d: \"any\" must "
2474 "appear alone in %s",
2475 filename, linenum, keyword);
2479 fatal("%s line %d: \"any\" must appear "
2480 "alone in %s", filename, linenum, keyword);
2481 } else if (auth2_methods_valid(arg, 0) != 0) {
2482 fatal("%s line %d: invalid %s method list.",
2483 filename, linenum, keyword);
2486 if (!found || !*activep)
2488 opt_array_append(filename, linenum, keyword,
2489 &options->auth_methods,
2490 &options->num_auth_methods, arg);
2493 fatal("%s line %d: no %s specified",
2494 filename, linenum, keyword);
2498 case sStreamLocalBindMask:
2499 arg = argv_next(&ac, &av);
2500 if (!arg || *arg == '\0')
2501 fatal("%s line %d: %s missing argument.",
2502 filename, linenum, keyword);
2503 /* Parse mode in octal format */
2504 value = strtol(arg, &p, 8);
2505 if (arg == p || value < 0 || value > 0777)
2506 fatal("%s line %d: Invalid %s.",
2507 filename, linenum, keyword);
2509 options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
2512 case sStreamLocalBindUnlink:
2513 intptr = &options->fwd_opts.streamlocal_bind_unlink;
2516 case sFingerprintHash:
2517 arg = argv_next(&ac, &av);
2518 if (!arg || *arg == '\0')
2519 fatal("%s line %d: %s missing argument.",
2520 filename, linenum, keyword);
2521 if ((value = ssh_digest_alg_by_name(arg)) == -1)
2522 fatal("%.200s line %d: Invalid %s algorithm \"%s\".",
2523 filename, linenum, keyword, arg);
2525 options->fingerprint_hash = value;
2528 case sExposeAuthInfo:
2529 intptr = &options->expose_userauth_info;
2533 #if !defined(__OpenBSD__) && !defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
2534 fatal("%s line %d: setting RDomain not supported on this "
2535 "platform.", filename, linenum);
2537 charptr = &options->routing_domain;
2538 arg = argv_next(&ac, &av);
2539 if (!arg || *arg == '\0')
2540 fatal("%s line %d: %s missing argument.",
2541 filename, linenum, keyword);
2542 if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2543 !valid_rdomain(arg))
2544 fatal("%s line %d: invalid routing domain",
2546 if (*activep && *charptr == NULL)
2547 *charptr = xstrdup(arg);
2550 case sRequiredRSASize:
2551 intptr = &options->required_rsa_size;
2554 case sChannelTimeout:
2555 uvalue = options->num_channel_timeouts;
2557 while ((arg = argv_next(&ac, &av)) != NULL) {
2558 /* Allow "none" only in first position */
2559 if (strcasecmp(arg, "none") == 0) {
2560 if (i > 0 || ac > 0) {
2561 error("%s line %d: keyword %s \"none\" "
2562 "argument must appear alone.",
2563 filename, linenum, keyword);
2566 } else if (parse_timeout(arg, NULL, NULL) != 0) {
2567 fatal("%s line %d: invalid channel timeout %s",
2568 filename, linenum, arg);
2570 if (!*activep || uvalue != 0)
2572 opt_array_append(filename, linenum, keyword,
2573 &options->channel_timeouts,
2574 &options->num_channel_timeouts, arg);
2578 case sUnusedConnectionTimeout:
2579 intptr = &options->unused_connection_timeout;
2580 /* peek at first arg for "none" so we can reuse parse_time */
2581 if (av[0] != NULL && strcasecmp(av[0], "none") == 0) {
2582 (void)argv_next(&ac, &av); /* consume arg */
2590 intptr = &options->use_blacklist;
2596 do_log2(opcode == sIgnore ?
2597 SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2598 "%s line %d: %s option %s", filename, linenum,
2599 opcode == sUnsupported ? "Unsupported" : "Deprecated",
2605 fatal("%s line %d: Missing handler for opcode %s (%d)",
2606 filename, linenum, keyword, opcode);
2608 /* Check that there is no garbage at end of line. */
2610 error("%.200s line %d: keyword %s extra arguments "
2611 "at end of line", filename, linenum, keyword);
2618 argv_free(oav, oac);
2623 process_server_config_line(ServerOptions *options, char *line,
2624 const char *filename, int linenum, int *activep,
2625 struct connection_info *connectinfo, struct include_list *includes)
2629 return process_server_config_line_depth(options, line, filename,
2630 linenum, activep, connectinfo, &inc_flags, 0, includes);
2634 /* Reads the server configuration file. */
2637 load_server_config(const char *filename, struct sshbuf *conf)
2640 char *line = NULL, *cp;
2641 size_t linesize = 0;
2645 debug2_f("filename %s", filename);
2646 if ((f = fopen(filename, "r")) == NULL) {
2651 /* grow buffer, so realloc is avoided for large config files */
2652 if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
2653 (r = sshbuf_allocate(conf, st.st_size)) != 0)
2654 fatal_fr(r, "allocate");
2655 while (getline(&line, &linesize, f) != -1) {
2658 * NB - preserve newlines, they are needed to reproduce
2659 * line numbers later for error messages
2661 cp = line + strspn(line, " \t\r");
2662 if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
2663 fatal_fr(r, "sshbuf_put");
2666 if ((r = sshbuf_put_u8(conf, 0)) != 0)
2667 fatal_fr(r, "sshbuf_put_u8");
2669 debug2_f("done config len = %zu", sshbuf_len(conf));
2673 parse_server_match_config(ServerOptions *options,
2674 struct include_list *includes, struct connection_info *connectinfo)
2678 initialize_server_options(&mo);
2679 parse_server_config(&mo, "reprocess config", cfg, includes,
2681 copy_set_server_options(options, &mo, 0);
2684 int parse_server_match_testspec(struct connection_info *ci, char *spec)
2688 while ((p = strsep(&spec, ",")) && *p != '\0') {
2689 if (strncmp(p, "addr=", 5) == 0) {
2690 ci->address = xstrdup(p + 5);
2691 } else if (strncmp(p, "host=", 5) == 0) {
2692 ci->host = xstrdup(p + 5);
2693 } else if (strncmp(p, "user=", 5) == 0) {
2694 ci->user = xstrdup(p + 5);
2695 } else if (strncmp(p, "laddr=", 6) == 0) {
2696 ci->laddress = xstrdup(p + 6);
2697 } else if (strncmp(p, "rdomain=", 8) == 0) {
2698 ci->rdomain = xstrdup(p + 8);
2699 } else if (strncmp(p, "lport=", 6) == 0) {
2700 ci->lport = a2port(p + 6);
2701 if (ci->lport == -1) {
2702 fprintf(stderr, "Invalid port '%s' in test mode"
2703 " specification %s\n", p+6, p);
2707 fprintf(stderr, "Invalid test mode specification %s\n",
2716 servconf_merge_subsystems(ServerOptions *dst, ServerOptions *src)
2720 for (i = 0; i < src->num_subsystems; i++) {
2722 for (j = 0; j < dst->num_subsystems; j++) {
2723 if (strcmp(src->subsystem_name[i],
2724 dst->subsystem_name[j]) == 0) {
2730 debug_f("override \"%s\"", dst->subsystem_name[j]);
2731 free(dst->subsystem_command[j]);
2732 free(dst->subsystem_args[j]);
2733 dst->subsystem_command[j] =
2734 xstrdup(src->subsystem_command[i]);
2735 dst->subsystem_args[j] =
2736 xstrdup(src->subsystem_args[i]);
2739 debug_f("add \"%s\"", src->subsystem_name[i]);
2740 dst->subsystem_name = xrecallocarray(
2741 dst->subsystem_name, dst->num_subsystems,
2742 dst->num_subsystems + 1, sizeof(*dst->subsystem_name));
2743 dst->subsystem_command = xrecallocarray(
2744 dst->subsystem_command, dst->num_subsystems,
2745 dst->num_subsystems + 1, sizeof(*dst->subsystem_command));
2746 dst->subsystem_args = xrecallocarray(
2747 dst->subsystem_args, dst->num_subsystems,
2748 dst->num_subsystems + 1, sizeof(*dst->subsystem_args));
2749 j = dst->num_subsystems++;
2750 dst->subsystem_name[j] = xstrdup(src->subsystem_name[i]);
2751 dst->subsystem_command[j] = xstrdup(src->subsystem_command[i]);
2752 dst->subsystem_args[j] = xstrdup(src->subsystem_args[i]);
2757 * Copy any supported values that are set.
2759 * If the preauth flag is set, we do not bother copying the string or
2760 * array values that are not used pre-authentication, because any that we
2761 * do use must be explicitly sent in mm_getpwnamallow().
2764 copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
2766 #define M_CP_INTOPT(n) do {\
2771 M_CP_INTOPT(password_authentication);
2772 M_CP_INTOPT(gss_authentication);
2773 M_CP_INTOPT(pubkey_authentication);
2774 M_CP_INTOPT(pubkey_auth_options);
2775 M_CP_INTOPT(kerberos_authentication);
2776 M_CP_INTOPT(hostbased_authentication);
2777 M_CP_INTOPT(hostbased_uses_name_from_packet_only);
2778 M_CP_INTOPT(kbd_interactive_authentication);
2779 M_CP_INTOPT(permit_root_login);
2780 M_CP_INTOPT(permit_empty_passwd);
2781 M_CP_INTOPT(ignore_rhosts);
2783 M_CP_INTOPT(allow_tcp_forwarding);
2784 M_CP_INTOPT(allow_streamlocal_forwarding);
2785 M_CP_INTOPT(allow_agent_forwarding);
2786 M_CP_INTOPT(disable_forwarding);
2787 M_CP_INTOPT(expose_userauth_info);
2788 M_CP_INTOPT(permit_tun);
2789 M_CP_INTOPT(fwd_opts.gateway_ports);
2790 M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
2791 M_CP_INTOPT(x11_display_offset);
2792 M_CP_INTOPT(x11_forwarding);
2793 M_CP_INTOPT(x11_use_localhost);
2794 M_CP_INTOPT(permit_tty);
2795 M_CP_INTOPT(permit_user_rc);
2796 M_CP_INTOPT(max_sessions);
2797 M_CP_INTOPT(max_authtries);
2798 M_CP_INTOPT(client_alive_count_max);
2799 M_CP_INTOPT(client_alive_interval);
2800 M_CP_INTOPT(ip_qos_interactive);
2801 M_CP_INTOPT(ip_qos_bulk);
2802 M_CP_INTOPT(rekey_limit);
2803 M_CP_INTOPT(rekey_interval);
2804 M_CP_INTOPT(log_level);
2805 M_CP_INTOPT(required_rsa_size);
2806 M_CP_INTOPT(unused_connection_timeout);
2809 * The bind_mask is a mode_t that may be unsigned, so we can't use
2810 * M_CP_INTOPT - it does a signed comparison that causes compiler
2813 if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
2814 dst->fwd_opts.streamlocal_bind_mask =
2815 src->fwd_opts.streamlocal_bind_mask;
2818 /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2819 #define M_CP_STROPT(n) do {\
2820 if (src->n != NULL && dst->n != src->n) { \
2825 #define M_CP_STRARRAYOPT(s, num_s) do {\
2827 if (src->num_s != 0) { \
2828 for (i = 0; i < dst->num_s; i++) \
2831 dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2832 for (i = 0; i < src->num_s; i++) \
2833 dst->s[i] = xstrdup(src->s[i]); \
2834 dst->num_s = src->num_s; \
2838 /* See comment in servconf.h */
2839 COPY_MATCH_STRING_OPTS();
2841 /* Arguments that accept '+...' need to be expanded */
2842 assemble_algorithms(dst);
2845 * The only things that should be below this point are string options
2846 * which are only used after authentication.
2851 /* These options may be "none" to clear a global setting */
2852 M_CP_STROPT(adm_forced_command);
2853 if (option_clear_or_none(dst->adm_forced_command)) {
2854 free(dst->adm_forced_command);
2855 dst->adm_forced_command = NULL;
2857 M_CP_STROPT(chroot_directory);
2858 if (option_clear_or_none(dst->chroot_directory)) {
2859 free(dst->chroot_directory);
2860 dst->chroot_directory = NULL;
2863 /* Subsystems require merging. */
2864 servconf_merge_subsystems(dst, src);
2869 #undef M_CP_STRARRAYOPT
2871 #define SERVCONF_MAX_DEPTH 16
2873 parse_server_config_depth(ServerOptions *options, const char *filename,
2874 struct sshbuf *conf, struct include_list *includes,
2875 struct connection_info *connectinfo, int flags, int *activep, int depth)
2877 int linenum, bad_options = 0;
2878 char *cp, *obuf, *cbuf;
2880 if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2881 fatal("Too many recursive configuration includes");
2883 debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
2884 (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
2886 if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2887 fatal_f("sshbuf_dup_string failed");
2889 while ((cp = strsep(&cbuf, "\n")) != NULL) {
2890 if (process_server_config_line_depth(options, cp,
2891 filename, linenum++, activep, connectinfo, &flags,
2892 depth, includes) != 0)
2896 if (bad_options > 0)
2897 fatal("%s: terminating, %d bad configuration options",
2898 filename, bad_options);
2902 parse_server_config(ServerOptions *options, const char *filename,
2903 struct sshbuf *conf, struct include_list *includes,
2904 struct connection_info *connectinfo, int reexec)
2906 int active = connectinfo ? 0 : 1;
2907 parse_server_config_depth(options, filename, conf, includes,
2908 connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
2910 process_queued_listen_addrs(options);
2914 fmt_multistate_int(int val, const struct multistate *m)
2918 for (i = 0; m[i].key != NULL; i++) {
2919 if (m[i].value == val)
2926 fmt_intarg(ServerOpCodes code, int val)
2931 case sAddressFamily:
2932 return fmt_multistate_int(val, multistate_addressfamily);
2933 case sPermitRootLogin:
2934 return fmt_multistate_int(val, multistate_permitrootlogin);
2936 return fmt_multistate_int(val, multistate_gatewayports);
2938 return fmt_multistate_int(val, multistate_compression);
2939 case sAllowTcpForwarding:
2940 return fmt_multistate_int(val, multistate_tcpfwd);
2941 case sAllowStreamLocalForwarding:
2942 return fmt_multistate_int(val, multistate_tcpfwd);
2944 return fmt_multistate_int(val, multistate_ignore_rhosts);
2945 case sFingerprintHash:
2946 return ssh_digest_alg_name(val);
2960 dump_cfg_int(ServerOpCodes code, int val)
2962 if (code == sUnusedConnectionTimeout && val == 0) {
2963 printf("%s none\n", lookup_opcode_name(code));
2966 printf("%s %d\n", lookup_opcode_name(code), val);
2970 dump_cfg_oct(ServerOpCodes code, int val)
2972 printf("%s 0%o\n", lookup_opcode_name(code), val);
2976 dump_cfg_fmtint(ServerOpCodes code, int val)
2978 printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2982 dump_cfg_string(ServerOpCodes code, const char *val)
2984 printf("%s %s\n", lookup_opcode_name(code),
2985 val == NULL ? "none" : val);
2989 dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2993 for (i = 0; i < count; i++)
2994 printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2998 dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
3003 case sAuthenticationMethods:
3004 case sChannelTimeout:
3012 printf("%s", lookup_opcode_name(code));
3013 for (i = 0; i < count; i++)
3014 printf(" %s", vals[i]);
3015 if (code == sAuthenticationMethods && count == 0)
3017 else if (code == sChannelTimeout && count == 0)
3023 format_listen_addrs(struct listenaddr *la)
3026 struct addrinfo *ai;
3027 char addr[NI_MAXHOST], port[NI_MAXSERV];
3028 char *laddr1 = xstrdup(""), *laddr2 = NULL;
3031 * ListenAddress must be after Port. add_one_listen_addr pushes
3032 * addresses onto a stack, so to maintain ordering we need to
3033 * print these in reverse order.
3035 for (ai = la->addrs; ai; ai = ai->ai_next) {
3036 if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
3037 sizeof(addr), port, sizeof(port),
3038 NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
3039 error("getnameinfo: %.100s", ssh_gai_strerror(r));
3043 if (ai->ai_family == AF_INET6) {
3044 xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
3046 la->rdomain == NULL ? "" : " rdomain ",
3047 la->rdomain == NULL ? "" : la->rdomain,
3050 xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
3052 la->rdomain == NULL ? "" : " rdomain ",
3053 la->rdomain == NULL ? "" : la->rdomain,
3062 dump_config(ServerOptions *o)
3067 /* these are usually at the top of the config */
3068 for (i = 0; i < o->num_ports; i++)
3069 printf("port %d\n", o->ports[i]);
3070 dump_cfg_fmtint(sAddressFamily, o->address_family);
3072 for (i = 0; i < o->num_listen_addrs; i++) {
3073 s = format_listen_addrs(&o->listen_addrs[i]);
3078 /* integer arguments */
3080 dump_cfg_fmtint(sUsePAM, o->use_pam);
3082 dump_cfg_int(sLoginGraceTime, o->login_grace_time);
3083 dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
3084 dump_cfg_int(sMaxAuthTries, o->max_authtries);
3085 dump_cfg_int(sMaxSessions, o->max_sessions);
3086 dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
3087 dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
3088 dump_cfg_int(sRequiredRSASize, o->required_rsa_size);
3089 dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
3090 dump_cfg_int(sUnusedConnectionTimeout, o->unused_connection_timeout);
3092 /* formatted integer arguments */
3093 dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
3094 dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
3095 dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
3096 dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
3097 dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
3098 o->hostbased_uses_name_from_packet_only);
3099 dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
3101 dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
3102 dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
3103 dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
3105 dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
3109 dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
3110 dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
3112 dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
3113 dump_cfg_fmtint(sKbdInteractiveAuthentication,
3114 o->kbd_interactive_authentication);
3115 dump_cfg_fmtint(sPrintMotd, o->print_motd);
3116 #ifndef DISABLE_LASTLOG
3117 dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
3119 dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
3120 dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
3121 dump_cfg_fmtint(sPermitTTY, o->permit_tty);
3122 dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
3123 dump_cfg_fmtint(sStrictModes, o->strict_modes);
3124 dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
3125 dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
3126 dump_cfg_fmtint(sCompression, o->compression);
3127 dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
3128 dump_cfg_fmtint(sUseDNS, o->use_dns);
3129 dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
3130 dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
3131 dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
3132 dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
3133 dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
3134 dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
3135 dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
3136 dump_cfg_fmtint(sUseBlacklist, o->use_blacklist);
3138 /* string arguments */
3139 dump_cfg_string(sPidFile, o->pid_file);
3140 dump_cfg_string(sModuliFile, o->moduli_file);
3141 dump_cfg_string(sXAuthLocation, o->xauth_location);
3142 dump_cfg_string(sCiphers, o->ciphers);
3143 dump_cfg_string(sMacs, o->macs);
3144 dump_cfg_string(sBanner, o->banner);
3145 dump_cfg_string(sForceCommand, o->adm_forced_command);
3146 dump_cfg_string(sChrootDirectory, o->chroot_directory);
3147 dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
3148 dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
3149 dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
3150 dump_cfg_string(sAuthorizedPrincipalsFile,
3151 o->authorized_principals_file);
3152 dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
3153 ? "none" : o->version_addendum);
3154 dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
3155 dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
3156 dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
3157 dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
3158 dump_cfg_string(sHostKeyAgent, o->host_key_agent);
3159 dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
3160 dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
3161 dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
3162 dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
3163 dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
3164 #if defined(__OpenBSD__) || defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
3165 dump_cfg_string(sRDomain, o->routing_domain);
3168 /* string arguments requiring a lookup */
3169 dump_cfg_string(sLogLevel, log_level_name(o->log_level));
3170 dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
3172 /* string array arguments */
3173 dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
3174 o->authorized_keys_files);
3175 dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
3177 dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
3178 o->host_cert_files);
3179 dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
3180 dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
3181 dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
3182 dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
3183 dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
3184 dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
3185 dump_cfg_strarray_oneline(sAuthenticationMethods,
3186 o->num_auth_methods, o->auth_methods);
3187 dump_cfg_strarray_oneline(sLogVerbose,
3188 o->num_log_verbose, o->log_verbose);
3189 dump_cfg_strarray_oneline(sChannelTimeout,
3190 o->num_channel_timeouts, o->channel_timeouts);
3192 /* other arguments */
3193 for (i = 0; i < o->num_subsystems; i++)
3194 printf("subsystem %s %s\n", o->subsystem_name[i],
3195 o->subsystem_args[i]);
3197 printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
3198 o->max_startups_rate, o->max_startups);
3199 printf("persourcemaxstartups ");
3200 if (o->per_source_max_startups == INT_MAX)
3203 printf("%d\n", o->per_source_max_startups);
3204 printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
3205 o->per_source_masklen_ipv6);
3208 for (i = 0; tunmode_desc[i].val != -1; i++) {
3209 if (tunmode_desc[i].val == o->permit_tun) {
3210 s = tunmode_desc[i].text;
3214 dump_cfg_string(sPermitTunnel, s);
3216 printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
3217 printf("%s\n", iptos2str(o->ip_qos_bulk));
3219 printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
3222 printf("permitopen");
3223 if (o->num_permitted_opens == 0)
3226 for (i = 0; i < o->num_permitted_opens; i++)
3227 printf(" %s", o->permitted_opens[i]);
3230 printf("permitlisten");
3231 if (o->num_permitted_listens == 0)
3234 for (i = 0; i < o->num_permitted_listens; i++)
3235 printf(" %s", o->permitted_listens[i]);
3239 if (o->permit_user_env_allowlist == NULL) {
3240 dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
3242 printf("permituserenvironment %s\n",
3243 o->permit_user_env_allowlist);
3246 printf("pubkeyauthoptions");
3247 if (o->pubkey_auth_options == 0)
3249 if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
3250 printf(" touch-required");
3251 if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
3252 printf(" verify-required");