1 /* $OpenBSD: servconf.c,v 1.396 2023/07/17 05:26:38 djm Exp $ */ 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" 14 15 #include <sys/types.h> 16 #include <sys/socket.h> 17 #include <sys/stat.h> 18 #ifdef __OpenBSD__ 19 #include <sys/sysctl.h> 20 #endif 21 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> 27 #endif 28 29 #include <ctype.h> 30 #include <netdb.h> 31 #include <pwd.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <signal.h> 36 #include <unistd.h> 37 #include <limits.h> 38 #include <stdarg.h> 39 #include <errno.h> 40 #ifdef HAVE_UTIL_H 41 #include <util.h> 42 #endif 43 #ifdef USE_SYSTEM_GLOB 44 # include <glob.h> 45 #else 46 # include "openbsd-compat/glob.h" 47 #endif 48 49 #include "openbsd-compat/sys-queue.h" 50 #include "xmalloc.h" 51 #include "ssh.h" 52 #include "log.h" 53 #include "sshbuf.h" 54 #include "misc.h" 55 #include "servconf.h" 56 #include "pathnames.h" 57 #include "cipher.h" 58 #include "sshkey.h" 59 #include "kex.h" 60 #include "mac.h" 61 #include "match.h" 62 #include "channels.h" 63 #include "groupaccess.h" 64 #include "canohost.h" 65 #include "packet.h" 66 #include "ssherr.h" 67 #include "hostfile.h" 68 #include "auth.h" 69 #include "myproposal.h" 70 #include "digest.h" 71 #include "version.h" 72 73 static void add_listen_addr(ServerOptions *, const char *, 74 const char *, int); 75 static void add_one_listen_addr(ServerOptions *, const char *, 76 const char *, int); 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); 80 81 /* Use of privilege separation or not */ 82 extern int use_privsep; 83 extern struct sshbuf *cfg; 84 85 /* Initializes the server options to their default values. */ 86 87 void 88 initialize_server_options(ServerOptions *options) 89 { 90 memset(options, 0, sizeof(*options)); 91 92 /* Portable-specific options */ 93 options->use_pam = -1; 94 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; 202 } 203 204 /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */ 205 static int 206 option_clear_or_none(const char *o) 207 { 208 return o == NULL || strcasecmp(o, "none") == 0; 209 } 210 211 static void 212 assemble_algorithms(ServerOptions *o) 213 { 214 char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig; 215 char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig; 216 int r; 217 218 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) \ 230 do { \ 231 if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \ 232 fatal_fr(r, "%s", #what); \ 233 } while (0) 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); 241 #undef ASSEMBLE 242 free(all_cipher); 243 free(all_mac); 244 free(all_kex); 245 free(all_key); 246 free(all_sig); 247 free(def_cipher); 248 free(def_mac); 249 free(def_kex); 250 free(def_key); 251 free(def_sig); 252 } 253 254 static const char *defaultkey = "[default]"; 255 256 void 257 servconf_add_hostkey(const char *file, const int line, 258 ServerOptions *options, const char *path, int userprovided) 259 { 260 char *apath = derelativise_path(path); 261 262 if (file == defaultkey && access(path, R_OK) != 0) 263 return; 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); 267 free(apath); 268 } 269 270 void 271 servconf_add_hostcert(const char *file, const int line, 272 ServerOptions *options, const char *path) 273 { 274 char *apath = derelativise_path(path); 275 276 opt_array_append(file, line, "HostCertificate", 277 &options->host_cert_files, &options->num_host_cert_files, apath); 278 free(apath); 279 } 280 281 void 282 fill_default_server_options(ServerOptions *options) 283 { 284 u_int i; 285 286 /* Portable-specific options */ 287 if (options->use_pam == -1) 288 options->use_pam = 1; 289 290 /* 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); 298 #endif 299 servconf_add_hostkey(defaultkey, 0, options, 300 _PATH_HOST_ED25519_KEY_FILE, 0); 301 #ifdef WITH_XMSS 302 servconf_add_hostkey(defaultkey, 0, options, 303 _PATH_HOST_XMSS_KEY_FILE, 0); 304 #endif /* WITH_XMSS */ 305 } 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; 382 } 383 if (options->compression == -1) 384 #ifdef WITH_ZLIB 385 options->compression = COMP_DELAYED; 386 #else 387 options->compression = COMP_NONE; 388 #endif 389 390 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); 433 } 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; 460 461 assemble_algorithms(options); 462 463 /* Turn privilege separation and sandboxing on by default */ 464 if (use_privsep == -1) 465 use_privsep = PRIVSEP_ON; 466 467 #define CLEAR_ON_NONE(v) \ 468 do { \ 469 if (option_clear_or_none(v)) { \ 470 free(v); \ 471 v = NULL; \ 472 } \ 473 } while(0) 474 #define CLEAR_ON_NONE_ARRAY(v, nv, none) \ 475 do { \ 476 if (options->nv == 1 && \ 477 strcasecmp(options->v[0], none) == 0) { \ 478 free(options->v[0]); \ 479 free(options->v); \ 480 options->v = NULL; \ 481 options->nv = 0; \ 482 } \ 483 } while (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); 495 496 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]); 500 501 CLEAR_ON_NONE_ARRAY(channel_timeouts, num_channel_timeouts, "none"); 502 CLEAR_ON_NONE_ARRAY(auth_methods, num_auth_methods, "any"); 503 #undef CLEAR_ON_NONE 504 #undef CLEAR_ON_NONE_ARRAY 505 } 506 507 /* Keyword tokens. */ 508 typedef enum { 509 sBadOption, /* == unknown option */ 510 /* Portable-specific options */ 511 sUsePAM, 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, 544 sUseBlacklist, 545 sDeprecated, sIgnore, sUnsupported 546 } ServerOpCodes; 547 548 #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 */ 553 554 /* Textual representation of the tokens. */ 555 static struct { 556 const char *name; 557 ServerOpCodes opcode; 558 u_int flags; 559 } keywords[] = { 560 /* Portable-specific options */ 561 #ifdef USE_PAM 562 { "usepam", sUsePAM, SSHCFG_GLOBAL }, 563 #else 564 { "usepam", sUnsupported, SSHCFG_GLOBAL }, 565 #endif 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 */ 594 #ifdef KRB5 595 { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, 596 { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, 597 { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, 598 #ifdef USE_AFS 599 { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, 600 #else 601 { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, 602 #endif 603 #else 604 { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, 605 { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, 606 { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, 607 { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, 608 #endif 609 { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, 610 { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, 611 #ifdef GSSAPI 612 { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, 613 { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, 614 { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL }, 615 #else 616 { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, 617 { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, 618 { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL }, 619 #endif 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 }, 630 #else 631 { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL }, 632 #endif 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_GLOBAL }, 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 */ 709 710 { NULL, sBadOption, 0 } 711 }; 712 713 static struct { 714 int val; 715 char *text; 716 } tunmode_desc[] = { 717 { SSH_TUNMODE_NO, "no" }, 718 { SSH_TUNMODE_POINTOPOINT, "point-to-point" }, 719 { SSH_TUNMODE_ETHERNET, "ethernet" }, 720 { SSH_TUNMODE_YES, "yes" }, 721 { -1, NULL } 722 }; 723 724 /* Returns an opcode name from its number */ 725 726 static const char * 727 lookup_opcode_name(ServerOpCodes code) 728 { 729 u_int i; 730 731 for (i = 0; keywords[i].name != NULL; i++) 732 if (keywords[i].opcode == code) 733 return(keywords[i].name); 734 return "UNKNOWN"; 735 } 736 737 738 /* 739 * Returns the number of the token pointed to by cp or sBadOption. 740 */ 741 742 static ServerOpCodes 743 parse_token(const char *cp, const char *filename, 744 int linenum, u_int *flags) 745 { 746 u_int i; 747 748 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; 752 } 753 754 error("%s: line %d: Bad configuration option: %s", 755 filename, linenum, cp); 756 return sBadOption; 757 } 758 759 char * 760 derelativise_path(const char *path) 761 { 762 char *expanded, *ret, cwd[PATH_MAX]; 763 764 if (strcasecmp(path, "none") == 0) 765 return xstrdup("none"); 766 expanded = tilde_expand_filename(path, getuid()); 767 if (path_absolute(expanded)) 768 return expanded; 769 if (getcwd(cwd, sizeof(cwd)) == NULL) 770 fatal_f("getcwd: %s", strerror(errno)); 771 xasprintf(&ret, "%s/%s", cwd, expanded); 772 free(expanded); 773 return ret; 774 } 775 776 static void 777 add_listen_addr(ServerOptions *options, const char *addr, 778 const char *rdomain, int port) 779 { 780 u_int i; 781 782 if (port > 0) 783 add_one_listen_addr(options, addr, rdomain, port); 784 else { 785 for (i = 0; i < options->num_ports; i++) { 786 add_one_listen_addr(options, addr, rdomain, 787 options->ports[i]); 788 } 789 } 790 } 791 792 static void 793 add_one_listen_addr(ServerOptions *options, const char *addr, 794 const char *rdomain, int port) 795 { 796 struct addrinfo hints, *ai, *aitop; 797 char strport[NI_MAXSERV]; 798 int gaierr; 799 u_int i; 800 801 /* 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) 804 break; 805 if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL) 806 continue; 807 if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0) 808 break; 809 } 810 if (i >= options->num_listen_addrs) { 811 /* No entry for this rdomain; allocate one */ 812 if (i >= INT_MAX) 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++; 818 if (rdomain != NULL) 819 options->listen_addrs[i].rdomain = xstrdup(rdomain); 820 } 821 /* options->listen_addrs[i] points to the addresses for this rdomain */ 822 823 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) 833 ; 834 ai->ai_next = options->listen_addrs[i].addrs; 835 options->listen_addrs[i].addrs = aitop; 836 } 837 838 /* Returns nonzero if the routing domain name is valid */ 839 static int 840 valid_rdomain(const char *name) 841 { 842 #if defined(HAVE_SYS_VALID_RDOMAIN) 843 return sys_valid_rdomain(name); 844 #elif defined(__OpenBSD__) 845 const char *errstr; 846 long long num; 847 struct rt_tableinfo info; 848 int mib[6]; 849 size_t miblen = sizeof(mib); 850 851 if (name == NULL) 852 return 1; 853 854 num = strtonum(name, 0, 255, &errstr); 855 if (errstr != NULL) 856 return 0; 857 858 /* Check whether the table actually exists */ 859 memset(mib, 0, sizeof(mib)); 860 mib[0] = CTL_NET; 861 mib[1] = PF_ROUTE; 862 mib[4] = NET_RT_TABLE; 863 mib[5] = (int)num; 864 if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1) 865 return 0; 866 867 return 1; 868 #else /* defined(__OpenBSD__) */ 869 error("Routing domains are not supported on this platform"); 870 return 0; 871 #endif 872 } 873 874 /* 875 * Queue a ListenAddress to be processed once we have all of the Ports 876 * and AddressFamily options. 877 */ 878 static void 879 queue_listen_addr(ServerOptions *options, const char *addr, 880 const char *rdomain, int port) 881 { 882 struct queued_listenaddr *qla; 883 884 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); 890 qla->port = port; 891 qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain); 892 } 893 894 /* 895 * Process queued (text) ListenAddress entries. 896 */ 897 static void 898 process_queued_listen_addrs(ServerOptions *options) 899 { 900 u_int i; 901 struct queued_listenaddr *qla; 902 903 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; 907 908 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); 911 free(qla->addr); 912 free(qla->rdomain); 913 } 914 free(options->queued_listen_addrs); 915 options->queued_listen_addrs = NULL; 916 options->num_queued_listens = 0; 917 } 918 919 /* 920 * Inform channels layer of permitopen options for a single forwarding 921 * direction (local/remote). 922 */ 923 static void 924 process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode, 925 char **opens, u_int num_opens) 926 { 927 u_int i; 928 int port; 929 char *host, *arg, *oarg; 930 int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE; 931 const char *what = lookup_opcode_name(opcode); 932 933 channel_clear_permission(ssh, FORWARD_ADM, where); 934 if (num_opens == 0) 935 return; /* permit any */ 936 937 /* handle keywords: "any" / "none" */ 938 if (num_opens == 1 && strcmp(opens[0], "any") == 0) 939 return; 940 if (num_opens == 1 && strcmp(opens[0], "none") == 0) { 941 channel_disable_admin(ssh, where); 942 return; 943 } 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); 948 if (host == NULL) 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, 955 where, host, port); 956 free(oarg); 957 } 958 } 959 960 /* 961 * Inform channels layer of permitopen options from configuration. 962 */ 963 void 964 process_permitopen(struct ssh *ssh, ServerOptions *options) 965 { 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); 971 } 972 973 /* Parse a ChannelTimeout clause "pattern=interval" */ 974 static int 975 parse_timeout(const char *s, char **typep, int *secsp) 976 { 977 char *cp, *sdup; 978 int secs; 979 980 if (typep != NULL) 981 *typep = NULL; 982 if (secsp != NULL) 983 *secsp = 0; 984 if (s == NULL) 985 return -1; 986 sdup = xstrdup(s); 987 988 if ((cp = strchr(sdup, '=')) == NULL || cp == sdup) { 989 free(sdup); 990 return -1; 991 } 992 *cp++ = '\0'; 993 if ((secs = convtime(cp)) < 0) { 994 free(sdup); 995 return -1; 996 } 997 /* success */ 998 if (typep != NULL) 999 *typep = xstrdup(sdup); 1000 if (secsp != NULL) 1001 *secsp = secs; 1002 free(sdup); 1003 return 0; 1004 } 1005 1006 void 1007 process_channel_timeouts(struct ssh *ssh, ServerOptions *options) 1008 { 1009 int secs; 1010 u_int i; 1011 char *type; 1012 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]); 1020 } 1021 channel_add_timeout(ssh, type, secs); 1022 free(type); 1023 } 1024 } 1025 1026 struct connection_info * 1027 get_connection_info(struct ssh *ssh, int populate, int use_dns) 1028 { 1029 static struct connection_info ci; 1030 1031 if (ssh == NULL || !populate) 1032 return &ci; 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); 1038 return &ci; 1039 } 1040 1041 /* 1042 * The strategy for the Match blocks is that the config file is parsed twice. 1043 * 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. 1048 * 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. 1055 * 1056 * Potential additions/improvements: 1057 * - Add Match support for pre-kex directives, eg. Ciphers. 1058 * 1059 * - Add a Tag directive (idea from David Leonard) ala pf, eg: 1060 * Match Address 192.168.0.* 1061 * Tag trusted 1062 * Match Group wheel 1063 * Tag trusted 1064 * Match Tag trusted 1065 * AllowTcpForwarding yes 1066 * GatewayPorts clientspecified 1067 * [...] 1068 * 1069 * - Add a PermittedChannelRequests directive 1070 * Match Group shell 1071 * PermittedChannelRequests session,forwarded-tcpip 1072 */ 1073 1074 static int 1075 match_cfg_line_group(const char *grps, int line, const char *user) 1076 { 1077 int result = 0; 1078 struct passwd *pw; 1079 1080 if (user == NULL) 1081 goto out; 1082 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", 1091 user, grps, line); 1092 } else { 1093 debug("user %.100s matched group list %.100s at line %d", user, 1094 grps, line); 1095 result = 1; 1096 } 1097 out: 1098 ga_free(); 1099 return result; 1100 } 1101 1102 static void 1103 match_test_missing_fatal(const char *criteria, const char *attrib) 1104 { 1105 fatal("'Match %s' in configuration but '%s' not in connection " 1106 "test specification.", criteria, attrib); 1107 } 1108 1109 /* 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 1112 * not match. 1113 */ 1114 static int 1115 match_cfg_line(char **condition, int line, struct connection_info *ci) 1116 { 1117 int result = 1, attributes = 0, port; 1118 char *arg, *attrib, *cp = *condition; 1119 1120 if (ci == NULL) 1121 debug3("checking syntax for 'Match %s'", cp); 1122 else 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); 1128 1129 while ((attrib = strdelim(&cp)) && *attrib != '\0') { 1130 /* Terminate on comment */ 1131 if (*attrib == '#') { 1132 cp = NULL; /* mark all arguments consumed */ 1133 break; 1134 } 1135 arg = NULL; 1136 attributes++; 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"); 1143 return -1; 1144 } 1145 if (arg != NULL && *arg == '#') 1146 cp = NULL; /* mark all arguments consumed */ 1147 *condition = cp; 1148 return 1; 1149 } 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); 1154 return -1; 1155 } 1156 if (strcasecmp(attrib, "user") == 0) { 1157 if (ci == NULL || (ci->test && ci->user == NULL)) { 1158 result = 0; 1159 continue; 1160 } 1161 if (ci->user == NULL) 1162 match_test_missing_fatal("User", "user"); 1163 if (match_usergroup_pattern_list(ci->user, arg) != 1) 1164 result = 0; 1165 else 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)) { 1170 result = 0; 1171 continue; 1172 } 1173 if (ci->user == NULL) 1174 match_test_missing_fatal("Group", "user"); 1175 switch (match_cfg_line_group(arg, line, ci->user)) { 1176 case -1: 1177 return -1; 1178 case 0: 1179 result = 0; 1180 } 1181 } else if (strcasecmp(attrib, "host") == 0) { 1182 if (ci == NULL || (ci->test && ci->host == NULL)) { 1183 result = 0; 1184 continue; 1185 } 1186 if (ci->host == NULL) 1187 match_test_missing_fatal("Host", "host"); 1188 if (match_hostname(ci->host, arg) != 1) 1189 result = 0; 1190 else 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); 1198 result = 0; 1199 continue; 1200 } 1201 if (ci->address == NULL) 1202 match_test_missing_fatal("Address", "addr"); 1203 switch (addr_match_list(ci->address, arg)) { 1204 case 1: 1205 debug("connection from %.100s matched 'Address " 1206 "%.100s' at line %d", ci->address, arg, line); 1207 break; 1208 case 0: 1209 case -1: 1210 result = 0; 1211 break; 1212 case -2: 1213 return -1; 1214 } 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, 1220 line); 1221 result = 0; 1222 continue; 1223 } 1224 if (ci->laddress == NULL) 1225 match_test_missing_fatal("LocalAddress", 1226 "laddr"); 1227 switch (addr_match_list(ci->laddress, arg)) { 1228 case 1: 1229 debug("connection from %.100s matched " 1230 "'LocalAddress %.100s' at line %d", 1231 ci->laddress, arg, line); 1232 break; 1233 case 0: 1234 case -1: 1235 result = 0; 1236 break; 1237 case -2: 1238 return -1; 1239 } 1240 } else if (strcasecmp(attrib, "localport") == 0) { 1241 if ((port = a2port(arg)) == -1) { 1242 error("Invalid LocalPort '%s' on Match line", 1243 arg); 1244 return -1; 1245 } 1246 if (ci == NULL || (ci->test && ci->lport == -1)) { 1247 result = 0; 1248 continue; 1249 } 1250 if (ci->lport == 0) 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); 1257 else 1258 result = 0; 1259 } else if (strcasecmp(attrib, "rdomain") == 0) { 1260 if (ci == NULL || (ci->test && ci->rdomain == NULL)) { 1261 result = 0; 1262 continue; 1263 } 1264 if (ci->rdomain == NULL) 1265 match_test_missing_fatal("RDomain", "rdomain"); 1266 if (match_pattern_list(ci->rdomain, arg, 0) != 1) 1267 result = 0; 1268 else 1269 debug("user %.100s matched 'RDomain %.100s' at " 1270 "line %d", ci->rdomain, arg, line); 1271 } else { 1272 error("Unsupported Match attribute %s", attrib); 1273 return -1; 1274 } 1275 } 1276 if (attributes == 0) { 1277 error("One or more attributes required for Match"); 1278 return -1; 1279 } 1280 if (ci != NULL) 1281 debug3("match %sfound", result ? "" : "not "); 1282 *condition = cp; 1283 return result; 1284 } 1285 1286 #define WHITESPACE " \t\r\n" 1287 1288 /* Multistate option parsing */ 1289 struct multistate { 1290 char *key; 1291 int value; 1292 }; 1293 static const struct multistate multistate_flag[] = { 1294 { "yes", 1 }, 1295 { "no", 0 }, 1296 { NULL, -1 } 1297 }; 1298 static const struct multistate multistate_ignore_rhosts[] = { 1299 { "yes", IGNORE_RHOSTS_YES }, 1300 { "no", IGNORE_RHOSTS_NO }, 1301 { "shosts-only", IGNORE_RHOSTS_SHOSTS }, 1302 { NULL, -1 } 1303 }; 1304 static const struct multistate multistate_addressfamily[] = { 1305 { "inet", AF_INET }, 1306 { "inet6", AF_INET6 }, 1307 { "any", AF_UNSPEC }, 1308 { NULL, -1 } 1309 }; 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 }, 1316 { NULL, -1 } 1317 }; 1318 static const struct multistate multistate_compression[] = { 1319 #ifdef WITH_ZLIB 1320 { "yes", COMP_DELAYED }, 1321 { "delayed", COMP_DELAYED }, 1322 #endif 1323 { "no", COMP_NONE }, 1324 { NULL, -1 } 1325 }; 1326 static const struct multistate multistate_gatewayports[] = { 1327 { "clientspecified", 2 }, 1328 { "yes", 1 }, 1329 { "no", 0 }, 1330 { NULL, -1 } 1331 }; 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 }, 1338 { NULL, -1 } 1339 }; 1340 1341 static int 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) 1346 { 1347 char *str, ***chararrayptr, **charptr, *arg, *arg2, *p, *keyword; 1348 int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found; 1349 int ca_only = 0; 1350 SyslogFacility *log_facility_ptr; 1351 LogLevel *log_level_ptr; 1352 ServerOpCodes opcode; 1353 u_int i, *uintptr, uvalue, flags = 0; 1354 size_t len; 1355 long long val64; 1356 const struct multistate *multistate_ptr; 1357 const char *errstr; 1358 struct include_item *item; 1359 glob_t gbuf; 1360 char **oav = NULL, **av; 1361 int oac = 0, ac; 1362 int ret = -1; 1363 1364 /* Strip trailing whitespace. Allow \f (form feed) at EOL only */ 1365 if ((len = strlen(line)) == 0) 1366 return 0; 1367 for (len--; len > 0; len--) { 1368 if (strchr(WHITESPACE "\f", line[len]) == NULL) 1369 break; 1370 line[len] = '\0'; 1371 } 1372 1373 str = line; 1374 if ((keyword = strdelim(&str)) == NULL) 1375 return 0; 1376 /* Ignore leading whitespace */ 1377 if (*keyword == '\0') 1378 keyword = strdelim(&str); 1379 if (!keyword || !*keyword || *keyword == '#') 1380 return 0; 1381 if (str == NULL || *str == '\0') { 1382 error("%s line %d: no argument after keyword \"%s\"", 1383 filename, linenum, keyword); 1384 return -1; 1385 } 1386 intptr = NULL; 1387 charptr = NULL; 1388 opcode = parse_token(keyword, filename, linenum, &flags); 1389 1390 if (argv_split(str, &oac, &oav, 1) != 0) { 1391 error("%s line %d: invalid quotes", filename, linenum); 1392 return -1; 1393 } 1394 ac = oac; 1395 av = oav; 1396 1397 if (activep == NULL) { /* We are processing a command line directive */ 1398 cmdline = 1; 1399 activep = &cmdline; 1400 } 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 */ 1408 ret = 0; 1409 goto out; 1410 } 1411 } 1412 1413 switch (opcode) { 1414 /* Portable-specific options */ 1415 case sUsePAM: 1416 intptr = &options->use_pam; 1417 goto parse_flag; 1418 1419 /* Standard Options */ 1420 case sBadOption: 1421 goto out; 1422 case sPort: 1423 /* ignore ports from configfile if cmdline specifies ports */ 1424 if (options->ports_from_cmdline) { 1425 argv_consume(&ac); 1426 break; 1427 } 1428 if (options->num_ports >= MAX_PORTS) 1429 fatal("%s line %d: too many ports.", 1430 filename, linenum); 1431 arg = argv_next(&ac, &av); 1432 if (!arg || *arg == '\0') 1433 fatal("%s line %d: missing port number.", 1434 filename, linenum); 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.", 1438 filename, linenum); 1439 break; 1440 1441 case sLoginGraceTime: 1442 intptr = &options->login_grace_time; 1443 parse_time: 1444 arg = argv_next(&ac, &av); 1445 if (!arg || *arg == '\0') 1446 fatal("%s line %d: missing time value.", 1447 filename, linenum); 1448 if ((value = convtime(arg)) == -1) 1449 fatal("%s line %d: invalid time value.", 1450 filename, linenum); 1451 if (*activep && *intptr == -1) 1452 *intptr = value; 1453 break; 1454 1455 case sListenAddress: 1456 arg = argv_next(&ac, &av); 1457 if (arg == NULL || *arg == '\0') 1458 fatal("%s line %d: missing address", 1459 filename, linenum); 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) { 1463 port = 0; 1464 p = arg; 1465 } else { 1466 arg2 = NULL; 1467 p = hpdelim(&arg); 1468 if (p == NULL) 1469 fatal("%s line %d: bad address:port usage", 1470 filename, linenum); 1471 p = cleanhostname(p); 1472 if (arg == NULL) 1473 port = 0; 1474 else if ((port = a2port(arg)) <= 0) 1475 fatal("%s line %d: bad port number", 1476 filename, linenum); 1477 } 1478 /* Optional routing table */ 1479 arg2 = NULL; 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", 1484 filename, linenum); 1485 if (!valid_rdomain(arg2)) 1486 fatal("%s line %d: bad routing domain", 1487 filename, linenum); 1488 } 1489 queue_listen_addr(options, p, arg2, port); 1490 1491 break; 1492 1493 case sAddressFamily: 1494 intptr = &options->address_family; 1495 multistate_ptr = multistate_addressfamily; 1496 parse_multistate: 1497 arg = argv_next(&ac, &av); 1498 if (!arg || *arg == '\0') 1499 fatal("%s line %d: missing argument.", 1500 filename, linenum); 1501 value = -1; 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; 1505 break; 1506 } 1507 } 1508 if (value == -1) 1509 fatal("%s line %d: unsupported option \"%s\".", 1510 filename, linenum, arg); 1511 if (*activep && *intptr == -1) 1512 *intptr = value; 1513 break; 1514 1515 case sHostKeyFile: 1516 arg = argv_next(&ac, &av); 1517 if (!arg || *arg == '\0') 1518 fatal("%s line %d: missing file name.", 1519 filename, linenum); 1520 if (*activep) { 1521 servconf_add_hostkey(filename, linenum, 1522 options, arg, 1); 1523 } 1524 break; 1525 1526 case sHostKeyAgent: 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.", 1531 filename, linenum); 1532 if (*activep && *charptr == NULL) 1533 *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ? 1534 xstrdup(arg) : derelativise_path(arg); 1535 break; 1536 1537 case sHostCertificate: 1538 arg = argv_next(&ac, &av); 1539 if (!arg || *arg == '\0') 1540 fatal("%s line %d: missing file name.", 1541 filename, linenum); 1542 if (*activep) 1543 servconf_add_hostcert(filename, linenum, options, arg); 1544 break; 1545 1546 case sPidFile: 1547 charptr = &options->pid_file; 1548 parse_filename: 1549 arg = argv_next(&ac, &av); 1550 if (!arg || *arg == '\0') 1551 fatal("%s line %d: missing file name.", 1552 filename, linenum); 1553 if (*activep && *charptr == NULL) { 1554 *charptr = derelativise_path(arg); 1555 /* increase optional counter */ 1556 if (intptr != NULL) 1557 *intptr = *intptr + 1; 1558 } 1559 break; 1560 1561 case sModuliFile: 1562 charptr = &options->moduli_file; 1563 goto parse_filename; 1564 1565 case sPermitRootLogin: 1566 intptr = &options->permit_root_login; 1567 multistate_ptr = multistate_permitrootlogin; 1568 goto parse_multistate; 1569 1570 case sIgnoreRhosts: 1571 intptr = &options->ignore_rhosts; 1572 multistate_ptr = multistate_ignore_rhosts; 1573 goto parse_multistate; 1574 1575 case sIgnoreUserKnownHosts: 1576 intptr = &options->ignore_user_known_hosts; 1577 parse_flag: 1578 multistate_ptr = multistate_flag; 1579 goto parse_multistate; 1580 1581 case sHostbasedAuthentication: 1582 intptr = &options->hostbased_authentication; 1583 goto parse_flag; 1584 1585 case sHostbasedUsesNameFromPacketOnly: 1586 intptr = &options->hostbased_uses_name_from_packet_only; 1587 goto parse_flag; 1588 1589 case sHostbasedAcceptedAlgorithms: 1590 charptr = &options->hostbased_accepted_algos; 1591 ca_only = 0; 1592 parse_pubkey_algos: 1593 arg = argv_next(&ac, &av); 1594 if (!arg || *arg == '\0') 1595 fatal("%s line %d: Missing argument.", 1596 filename, linenum); 1597 if (*arg != '-' && 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); 1604 break; 1605 1606 case sHostKeyAlgorithms: 1607 charptr = &options->hostkeyalgorithms; 1608 ca_only = 0; 1609 goto parse_pubkey_algos; 1610 1611 case sCASignatureAlgorithms: 1612 charptr = &options->ca_sign_algorithms; 1613 ca_only = 1; 1614 goto parse_pubkey_algos; 1615 1616 case sPubkeyAuthentication: 1617 intptr = &options->pubkey_authentication; 1618 ca_only = 0; 1619 goto parse_flag; 1620 1621 case sPubkeyAcceptedAlgorithms: 1622 charptr = &options->pubkey_accepted_algos; 1623 ca_only = 0; 1624 goto parse_pubkey_algos; 1625 1626 case sPubkeyAuthOptions: 1627 intptr = &options->pubkey_auth_options; 1628 value = 0; 1629 while ((arg = argv_next(&ac, &av)) != NULL) { 1630 if (strcasecmp(arg, "none") == 0) 1631 continue; 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; 1636 else { 1637 error("%s line %d: unsupported %s option %s", 1638 filename, linenum, keyword, arg); 1639 goto out; 1640 } 1641 } 1642 if (*activep && *intptr == -1) 1643 *intptr = value; 1644 break; 1645 1646 case sKerberosAuthentication: 1647 intptr = &options->kerberos_authentication; 1648 goto parse_flag; 1649 1650 case sKerberosOrLocalPasswd: 1651 intptr = &options->kerberos_or_local_passwd; 1652 goto parse_flag; 1653 1654 case sKerberosTicketCleanup: 1655 intptr = &options->kerberos_ticket_cleanup; 1656 goto parse_flag; 1657 1658 case sKerberosGetAFSToken: 1659 intptr = &options->kerberos_get_afs_token; 1660 goto parse_flag; 1661 1662 case sGssAuthentication: 1663 intptr = &options->gss_authentication; 1664 goto parse_flag; 1665 1666 case sGssCleanupCreds: 1667 intptr = &options->gss_cleanup_creds; 1668 goto parse_flag; 1669 1670 case sGssStrictAcceptor: 1671 intptr = &options->gss_strict_acceptor; 1672 goto parse_flag; 1673 1674 case sPasswordAuthentication: 1675 intptr = &options->password_authentication; 1676 goto parse_flag; 1677 1678 case sKbdInteractiveAuthentication: 1679 intptr = &options->kbd_interactive_authentication; 1680 goto parse_flag; 1681 1682 case sPrintMotd: 1683 intptr = &options->print_motd; 1684 goto parse_flag; 1685 1686 case sPrintLastLog: 1687 intptr = &options->print_lastlog; 1688 goto parse_flag; 1689 1690 case sX11Forwarding: 1691 intptr = &options->x11_forwarding; 1692 goto parse_flag; 1693 1694 case sX11DisplayOffset: 1695 intptr = &options->x11_display_offset; 1696 parse_int: 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) 1702 *intptr = value; 1703 break; 1704 1705 case sX11UseLocalhost: 1706 intptr = &options->x11_use_localhost; 1707 goto parse_flag; 1708 1709 case sXAuthLocation: 1710 charptr = &options->xauth_location; 1711 goto parse_filename; 1712 1713 case sPermitTTY: 1714 intptr = &options->permit_tty; 1715 goto parse_flag; 1716 1717 case sPermitUserRC: 1718 intptr = &options->permit_user_rc; 1719 goto parse_flag; 1720 1721 case sStrictModes: 1722 intptr = &options->strict_modes; 1723 goto parse_flag; 1724 1725 case sTCPKeepAlive: 1726 intptr = &options->tcp_keep_alive; 1727 goto parse_flag; 1728 1729 case sEmptyPasswd: 1730 intptr = &options->permit_empty_passwd; 1731 goto parse_flag; 1732 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); 1740 value = 0; 1741 p = NULL; 1742 if (strcmp(arg, "yes") == 0) 1743 value = 1; 1744 else if (strcmp(arg, "no") == 0) 1745 value = 0; 1746 else { 1747 /* Pattern-list specified */ 1748 value = 1; 1749 p = xstrdup(arg); 1750 } 1751 if (*activep && *intptr == -1) { 1752 *intptr = value; 1753 *charptr = p; 1754 p = NULL; 1755 } 1756 free(p); 1757 break; 1758 1759 case sCompression: 1760 intptr = &options->compression; 1761 multistate_ptr = multistate_compression; 1762 goto parse_multistate; 1763 1764 case sRekeyLimit: 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) { 1770 val64 = 0; 1771 } else { 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); 1779 } 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 */ 1785 break; 1786 } 1787 intptr = &options->rekey_interval; 1788 goto parse_time; 1789 } 1790 break; 1791 1792 case sGatewayPorts: 1793 intptr = &options->fwd_opts.gateway_ports; 1794 multistate_ptr = multistate_gatewayports; 1795 goto parse_multistate; 1796 1797 case sUseDNS: 1798 intptr = &options->use_dns; 1799 goto parse_flag; 1800 1801 case sLogFacility: 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; 1810 break; 1811 1812 case sLogLevel: 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; 1821 break; 1822 1823 case sLogVerbose: 1824 found = options->num_log_verbose == 0; 1825 i = 0; 1826 while ((arg = argv_next(&ac, &av)) != NULL) { 1827 if (*arg == '\0') { 1828 error("%s line %d: keyword %s empty argument", 1829 filename, linenum, keyword); 1830 goto out; 1831 } 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); 1838 goto out; 1839 } 1840 } 1841 i++; 1842 if (!found || !*activep) 1843 continue; 1844 opt_array_append(filename, linenum, keyword, 1845 &options->log_verbose, &options->num_log_verbose, 1846 arg); 1847 } 1848 break; 1849 1850 case sAllowTcpForwarding: 1851 intptr = &options->allow_tcp_forwarding; 1852 multistate_ptr = multistate_tcpfwd; 1853 goto parse_multistate; 1854 1855 case sAllowStreamLocalForwarding: 1856 intptr = &options->allow_streamlocal_forwarding; 1857 multistate_ptr = multistate_tcpfwd; 1858 goto parse_multistate; 1859 1860 case sAllowAgentForwarding: 1861 intptr = &options->allow_agent_forwarding; 1862 goto parse_flag; 1863 1864 case sDisableForwarding: 1865 intptr = &options->disable_forwarding; 1866 goto parse_flag; 1867 1868 case sAllowUsers: 1869 chararrayptr = &options->allow_users; 1870 uintptr = &options->num_allow_users; 1871 parse_allowdenyusers: 1872 while ((arg = argv_next(&ac, &av)) != NULL) { 1873 if (*arg == '\0' || 1874 match_user(NULL, NULL, NULL, arg) == -1) 1875 fatal("%s line %d: invalid %s pattern: \"%s\"", 1876 filename, linenum, keyword, arg); 1877 if (!*activep) 1878 continue; 1879 opt_array_append(filename, linenum, keyword, 1880 chararrayptr, uintptr, arg); 1881 } 1882 break; 1883 1884 case sDenyUsers: 1885 chararrayptr = &options->deny_users; 1886 uintptr = &options->num_deny_users; 1887 goto parse_allowdenyusers; 1888 1889 case sAllowGroups: 1890 chararrayptr = &options->allow_groups; 1891 uintptr = &options->num_allow_groups; 1892 parse_allowdenygroups: 1893 while ((arg = argv_next(&ac, &av)) != NULL) { 1894 if (*arg == '\0') 1895 fatal("%s line %d: empty %s pattern", 1896 filename, linenum, keyword); 1897 if (!*activep) 1898 continue; 1899 opt_array_append(filename, linenum, keyword, 1900 chararrayptr, uintptr, arg); 1901 } 1902 break; 1903 1904 case sDenyGroups: 1905 chararrayptr = &options->deny_groups; 1906 uintptr = &options->num_deny_groups; 1907 goto parse_allowdenygroups; 1908 1909 case sCiphers: 1910 arg = argv_next(&ac, &av); 1911 if (!arg || *arg == '\0') 1912 fatal("%s line %d: %s missing argument.", 1913 filename, linenum, keyword); 1914 if (*arg != '-' && 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); 1920 break; 1921 1922 case sMacs: 1923 arg = argv_next(&ac, &av); 1924 if (!arg || *arg == '\0') 1925 fatal("%s line %d: %s missing argument.", 1926 filename, linenum, keyword); 1927 if (*arg != '-' && 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); 1933 break; 1934 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); 1940 if (*arg != '-' && 1941 !kex_names_valid(*arg == '+' || *arg == '^' ? 1942 arg + 1 : 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); 1947 break; 1948 1949 case sSubsystem: 1950 if (options->num_subsystems >= MAX_SUBSYSTEMS) { 1951 fatal("%s line %d: too many subsystems defined.", 1952 filename, linenum); 1953 } 1954 arg = argv_next(&ac, &av); 1955 if (!arg || *arg == '\0') 1956 fatal("%s line %d: %s missing argument.", 1957 filename, linenum, keyword); 1958 if (!*activep) { 1959 arg = argv_next(&ac, &av); 1960 break; 1961 } 1962 for (i = 0; i < options->num_subsystems; i++) 1963 if (strcmp(arg, options->subsystem_name[i]) == 0) 1964 fatal("%s line %d: Subsystem '%s' " 1965 "already defined.", filename, linenum, arg); 1966 options->subsystem_name[options->num_subsystems] = xstrdup(arg); 1967 arg = argv_next(&ac, &av); 1968 if (!arg || *arg == '\0') 1969 fatal("%s line %d: Missing subsystem command.", 1970 filename, linenum); 1971 options->subsystem_command[options->num_subsystems] = xstrdup(arg); 1972 1973 /* Collect arguments (separate to executable) */ 1974 p = xstrdup(arg); 1975 len = strlen(p) + 1; 1976 while ((arg = argv_next(&ac, &av)) != NULL) { 1977 len += 1 + strlen(arg); 1978 p = xreallocarray(p, 1, len); 1979 strlcat(p, " ", len); 1980 strlcat(p, arg, len); 1981 } 1982 options->subsystem_args[options->num_subsystems] = p; 1983 options->num_subsystems++; 1984 break; 1985 1986 case sMaxStartups: 1987 arg = argv_next(&ac, &av); 1988 if (!arg || *arg == '\0') 1989 fatal("%s line %d: %s missing argument.", 1990 filename, linenum, keyword); 1991 if ((n = sscanf(arg, "%d:%d:%d", 1992 &options->max_startups_begin, 1993 &options->max_startups_rate, 1994 &options->max_startups)) == 3) { 1995 if (options->max_startups_begin > 1996 options->max_startups || 1997 options->max_startups_rate > 100 || 1998 options->max_startups_rate < 1) 1999 fatal("%s line %d: Invalid %s spec.", 2000 filename, linenum, keyword); 2001 } else if (n != 1) 2002 fatal("%s line %d: Invalid %s spec.", 2003 filename, linenum, keyword); 2004 else 2005 options->max_startups = options->max_startups_begin; 2006 if (options->max_startups <= 0 || 2007 options->max_startups_begin <= 0) 2008 fatal("%s line %d: Invalid %s spec.", 2009 filename, linenum, keyword); 2010 break; 2011 2012 case sPerSourceNetBlockSize: 2013 arg = argv_next(&ac, &av); 2014 if (!arg || *arg == '\0') 2015 fatal("%s line %d: %s missing argument.", 2016 filename, linenum, keyword); 2017 switch (n = sscanf(arg, "%d:%d", &value, &value2)) { 2018 case 2: 2019 if (value2 < 0 || value2 > 128) 2020 n = -1; 2021 /* FALLTHROUGH */ 2022 case 1: 2023 if (value < 0 || value > 32) 2024 n = -1; 2025 } 2026 if (n != 1 && n != 2) 2027 fatal("%s line %d: Invalid %s spec.", 2028 filename, linenum, keyword); 2029 if (*activep) { 2030 options->per_source_masklen_ipv4 = value; 2031 options->per_source_masklen_ipv6 = value2; 2032 } 2033 break; 2034 2035 case sPerSourceMaxStartups: 2036 arg = argv_next(&ac, &av); 2037 if (!arg || *arg == '\0') 2038 fatal("%s line %d: %s missing argument.", 2039 filename, linenum, keyword); 2040 if (strcmp(arg, "none") == 0) { /* no limit */ 2041 value = INT_MAX; 2042 } else { 2043 if ((errstr = atoi_err(arg, &value)) != NULL) 2044 fatal("%s line %d: %s integer value %s.", 2045 filename, linenum, keyword, errstr); 2046 } 2047 if (*activep) 2048 options->per_source_max_startups = value; 2049 break; 2050 2051 case sMaxAuthTries: 2052 intptr = &options->max_authtries; 2053 goto parse_int; 2054 2055 case sMaxSessions: 2056 intptr = &options->max_sessions; 2057 goto parse_int; 2058 2059 case sBanner: 2060 charptr = &options->banner; 2061 goto parse_filename; 2062 2063 /* 2064 * These options can contain %X options expanded at 2065 * connect time, so that you can specify paths like: 2066 * 2067 * AuthorizedKeysFile /etc/ssh_keys/%u 2068 */ 2069 case sAuthorizedKeysFile: 2070 uvalue = options->num_authkeys_files; 2071 while ((arg = argv_next(&ac, &av)) != NULL) { 2072 if (*arg == '\0') { 2073 error("%s line %d: keyword %s empty argument", 2074 filename, linenum, keyword); 2075 goto out; 2076 } 2077 arg2 = tilde_expand_filename(arg, getuid()); 2078 if (*activep && uvalue == 0) { 2079 opt_array_append(filename, linenum, keyword, 2080 &options->authorized_keys_files, 2081 &options->num_authkeys_files, arg2); 2082 } 2083 free(arg2); 2084 } 2085 break; 2086 2087 case sAuthorizedPrincipalsFile: 2088 charptr = &options->authorized_principals_file; 2089 arg = argv_next(&ac, &av); 2090 if (!arg || *arg == '\0') 2091 fatal("%s line %d: %s missing argument.", 2092 filename, linenum, keyword); 2093 if (*activep && *charptr == NULL) { 2094 *charptr = tilde_expand_filename(arg, getuid()); 2095 /* increase optional counter */ 2096 if (intptr != NULL) 2097 *intptr = *intptr + 1; 2098 } 2099 break; 2100 2101 case sClientAliveInterval: 2102 intptr = &options->client_alive_interval; 2103 goto parse_time; 2104 2105 case sClientAliveCountMax: 2106 intptr = &options->client_alive_count_max; 2107 goto parse_int; 2108 2109 case sAcceptEnv: 2110 while ((arg = argv_next(&ac, &av)) != NULL) { 2111 if (*arg == '\0' || strchr(arg, '=') != NULL) 2112 fatal("%s line %d: Invalid environment name.", 2113 filename, linenum); 2114 if (!*activep) 2115 continue; 2116 opt_array_append(filename, linenum, keyword, 2117 &options->accept_env, &options->num_accept_env, 2118 arg); 2119 } 2120 break; 2121 2122 case sSetEnv: 2123 uvalue = options->num_setenv; 2124 while ((arg = argv_next(&ac, &av)) != NULL) { 2125 if (*arg == '\0' || strchr(arg, '=') == NULL) 2126 fatal("%s line %d: Invalid environment.", 2127 filename, linenum); 2128 if (!*activep || uvalue != 0) 2129 continue; 2130 if (lookup_setenv_in_list(arg, options->setenv, 2131 options->num_setenv) != NULL) { 2132 debug2("%s line %d: ignoring duplicate env " 2133 "name \"%.64s\"", filename, linenum, arg); 2134 continue; 2135 } 2136 opt_array_append(filename, linenum, keyword, 2137 &options->setenv, &options->num_setenv, arg); 2138 } 2139 break; 2140 2141 case sPermitTunnel: 2142 intptr = &options->permit_tun; 2143 arg = argv_next(&ac, &av); 2144 if (!arg || *arg == '\0') 2145 fatal("%s line %d: %s missing argument.", 2146 filename, linenum, keyword); 2147 value = -1; 2148 for (i = 0; tunmode_desc[i].val != -1; i++) 2149 if (strcmp(tunmode_desc[i].text, arg) == 0) { 2150 value = tunmode_desc[i].val; 2151 break; 2152 } 2153 if (value == -1) 2154 fatal("%s line %d: bad %s argument %s", 2155 filename, linenum, keyword, arg); 2156 if (*activep && *intptr == -1) 2157 *intptr = value; 2158 break; 2159 2160 case sInclude: 2161 if (cmdline) { 2162 fatal("Include directive not supported as a " 2163 "command-line option"); 2164 } 2165 value = 0; 2166 while ((arg2 = argv_next(&ac, &av)) != NULL) { 2167 if (*arg2 == '\0') { 2168 error("%s line %d: keyword %s empty argument", 2169 filename, linenum, keyword); 2170 goto out; 2171 } 2172 value++; 2173 found = 0; 2174 if (*arg2 != '/' && *arg2 != '~') { 2175 xasprintf(&arg, "%s/%s", SSHDIR, arg2); 2176 } else 2177 arg = xstrdup(arg2); 2178 2179 /* 2180 * Don't let included files clobber the containing 2181 * file's Match state. 2182 */ 2183 oactive = *activep; 2184 2185 /* consult cache of include files */ 2186 TAILQ_FOREACH(item, includes, entry) { 2187 if (strcmp(item->selector, arg) != 0) 2188 continue; 2189 if (item->filename != NULL) { 2190 parse_server_config_depth(options, 2191 item->filename, item->contents, 2192 includes, connectinfo, 2193 (*inc_flags & SSHCFG_MATCH_ONLY 2194 ? SSHCFG_MATCH_ONLY : (oactive 2195 ? 0 : SSHCFG_NEVERMATCH)), 2196 activep, depth + 1); 2197 } 2198 found = 1; 2199 *activep = oactive; 2200 } 2201 if (found != 0) { 2202 free(arg); 2203 continue; 2204 } 2205 2206 /* requested glob was not in cache */ 2207 debug2("%s line %d: new include %s", 2208 filename, linenum, arg); 2209 if ((r = glob(arg, 0, NULL, &gbuf)) != 0) { 2210 if (r != GLOB_NOMATCH) { 2211 fatal("%s line %d: include \"%s\" glob " 2212 "failed", filename, linenum, arg); 2213 } 2214 /* 2215 * If no entry matched then record a 2216 * placeholder to skip later glob calls. 2217 */ 2218 debug2("%s line %d: no match for %s", 2219 filename, linenum, arg); 2220 item = xcalloc(1, sizeof(*item)); 2221 item->selector = strdup(arg); 2222 TAILQ_INSERT_TAIL(includes, 2223 item, entry); 2224 } 2225 if (gbuf.gl_pathc > INT_MAX) 2226 fatal_f("too many glob results"); 2227 for (n = 0; n < (int)gbuf.gl_pathc; n++) { 2228 debug2("%s line %d: including %s", 2229 filename, linenum, gbuf.gl_pathv[n]); 2230 item = xcalloc(1, sizeof(*item)); 2231 item->selector = strdup(arg); 2232 item->filename = strdup(gbuf.gl_pathv[n]); 2233 if ((item->contents = sshbuf_new()) == NULL) 2234 fatal_f("sshbuf_new failed"); 2235 load_server_config(item->filename, 2236 item->contents); 2237 parse_server_config_depth(options, 2238 item->filename, item->contents, 2239 includes, connectinfo, 2240 (*inc_flags & SSHCFG_MATCH_ONLY 2241 ? SSHCFG_MATCH_ONLY : (oactive 2242 ? 0 : SSHCFG_NEVERMATCH)), 2243 activep, depth + 1); 2244 *activep = oactive; 2245 TAILQ_INSERT_TAIL(includes, item, entry); 2246 } 2247 globfree(&gbuf); 2248 free(arg); 2249 } 2250 if (value == 0) { 2251 fatal("%s line %d: %s missing filename argument", 2252 filename, linenum, keyword); 2253 } 2254 break; 2255 2256 case sMatch: 2257 if (cmdline) 2258 fatal("Match directive not supported as a command-line " 2259 "option"); 2260 value = match_cfg_line(&str, linenum, 2261 (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo)); 2262 if (value < 0) 2263 fatal("%s line %d: Bad Match condition", filename, 2264 linenum); 2265 *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value; 2266 /* 2267 * The MATCH_ONLY flag is applicable only until the first 2268 * match block. 2269 */ 2270 *inc_flags &= ~SSHCFG_MATCH_ONLY; 2271 /* 2272 * If match_cfg_line() didn't consume all its arguments then 2273 * arrange for the extra arguments check below to fail. 2274 */ 2275 if (str == NULL || *str == '\0') 2276 argv_consume(&ac); 2277 break; 2278 2279 case sPermitListen: 2280 case sPermitOpen: 2281 if (opcode == sPermitListen) { 2282 uintptr = &options->num_permitted_listens; 2283 chararrayptr = &options->permitted_listens; 2284 } else { 2285 uintptr = &options->num_permitted_opens; 2286 chararrayptr = &options->permitted_opens; 2287 } 2288 arg = argv_next(&ac, &av); 2289 if (!arg || *arg == '\0') 2290 fatal("%s line %d: %s missing argument.", 2291 filename, linenum, keyword); 2292 uvalue = *uintptr; /* modified later */ 2293 if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) { 2294 if (*activep && uvalue == 0) { 2295 *uintptr = 1; 2296 *chararrayptr = xcalloc(1, 2297 sizeof(**chararrayptr)); 2298 (*chararrayptr)[0] = xstrdup(arg); 2299 } 2300 break; 2301 } 2302 for (; arg != NULL && *arg != '\0'; arg = argv_next(&ac, &av)) { 2303 if (opcode == sPermitListen && 2304 strchr(arg, ':') == NULL) { 2305 /* 2306 * Allow bare port number for PermitListen 2307 * to indicate a wildcard listen host. 2308 */ 2309 xasprintf(&arg2, "*:%s", arg); 2310 } else { 2311 arg2 = xstrdup(arg); 2312 p = hpdelim(&arg); 2313 if (p == NULL) { 2314 fatal("%s line %d: %s missing host", 2315 filename, linenum, keyword); 2316 } 2317 p = cleanhostname(p); 2318 } 2319 if (arg == NULL || 2320 ((port = permitopen_port(arg)) < 0)) { 2321 fatal("%s line %d: %s bad port number", 2322 filename, linenum, keyword); 2323 } 2324 if (*activep && uvalue == 0) { 2325 opt_array_append(filename, linenum, keyword, 2326 chararrayptr, uintptr, arg2); 2327 } 2328 free(arg2); 2329 } 2330 break; 2331 2332 case sForceCommand: 2333 if (str == NULL || *str == '\0') 2334 fatal("%s line %d: %s missing argument.", 2335 filename, linenum, keyword); 2336 len = strspn(str, WHITESPACE); 2337 if (*activep && options->adm_forced_command == NULL) 2338 options->adm_forced_command = xstrdup(str + len); 2339 argv_consume(&ac); 2340 break; 2341 2342 case sChrootDirectory: 2343 charptr = &options->chroot_directory; 2344 2345 arg = argv_next(&ac, &av); 2346 if (!arg || *arg == '\0') 2347 fatal("%s line %d: %s missing argument.", 2348 filename, linenum, keyword); 2349 if (*activep && *charptr == NULL) 2350 *charptr = xstrdup(arg); 2351 break; 2352 2353 case sTrustedUserCAKeys: 2354 charptr = &options->trusted_user_ca_keys; 2355 goto parse_filename; 2356 2357 case sRevokedKeys: 2358 charptr = &options->revoked_keys_file; 2359 goto parse_filename; 2360 2361 case sSecurityKeyProvider: 2362 charptr = &options->sk_provider; 2363 arg = argv_next(&ac, &av); 2364 if (!arg || *arg == '\0') 2365 fatal("%s line %d: %s missing argument.", 2366 filename, linenum, keyword); 2367 if (*activep && *charptr == NULL) { 2368 *charptr = strcasecmp(arg, "internal") == 0 ? 2369 xstrdup(arg) : derelativise_path(arg); 2370 /* increase optional counter */ 2371 if (intptr != NULL) 2372 *intptr = *intptr + 1; 2373 } 2374 break; 2375 2376 case sIPQoS: 2377 arg = argv_next(&ac, &av); 2378 if (!arg || *arg == '\0') 2379 fatal("%s line %d: %s missing argument.", 2380 filename, linenum, keyword); 2381 if ((value = parse_ipqos(arg)) == -1) 2382 fatal("%s line %d: Bad %s value: %s", 2383 filename, linenum, keyword, arg); 2384 arg = argv_next(&ac, &av); 2385 if (arg == NULL) 2386 value2 = value; 2387 else if ((value2 = parse_ipqos(arg)) == -1) 2388 fatal("%s line %d: Bad %s value: %s", 2389 filename, linenum, keyword, arg); 2390 if (*activep) { 2391 options->ip_qos_interactive = value; 2392 options->ip_qos_bulk = value2; 2393 } 2394 break; 2395 2396 case sVersionAddendum: 2397 if (str == NULL || *str == '\0') 2398 fatal("%s line %d: %s missing argument.", 2399 filename, linenum, keyword); 2400 len = strspn(str, WHITESPACE); 2401 if (strchr(str + len, '\r') != NULL) { 2402 fatal("%.200s line %d: Invalid %s argument", 2403 filename, linenum, keyword); 2404 } 2405 if ((arg = strchr(line, '#')) != NULL) { 2406 *arg = '\0'; 2407 rtrim(line); 2408 } 2409 if (*activep && options->version_addendum == NULL) { 2410 if (strcasecmp(str + len, "none") == 0) 2411 options->version_addendum = xstrdup(""); 2412 else 2413 options->version_addendum = xstrdup(str + len); 2414 } 2415 argv_consume(&ac); 2416 break; 2417 2418 case sAuthorizedKeysCommand: 2419 charptr = &options->authorized_keys_command; 2420 parse_command: 2421 len = strspn(str, WHITESPACE); 2422 if (str[len] != '/' && strcasecmp(str + len, "none") != 0) { 2423 fatal("%.200s line %d: %s must be an absolute path", 2424 filename, linenum, keyword); 2425 } 2426 if (*activep && *charptr == NULL) 2427 *charptr = xstrdup(str + len); 2428 argv_consume(&ac); 2429 break; 2430 2431 case sAuthorizedKeysCommandUser: 2432 charptr = &options->authorized_keys_command_user; 2433 parse_localuser: 2434 arg = argv_next(&ac, &av); 2435 if (!arg || *arg == '\0') { 2436 fatal("%s line %d: missing %s argument.", 2437 filename, linenum, keyword); 2438 } 2439 if (*activep && *charptr == NULL) 2440 *charptr = xstrdup(arg); 2441 break; 2442 2443 case sAuthorizedPrincipalsCommand: 2444 charptr = &options->authorized_principals_command; 2445 goto parse_command; 2446 2447 case sAuthorizedPrincipalsCommandUser: 2448 charptr = &options->authorized_principals_command_user; 2449 goto parse_localuser; 2450 2451 case sAuthenticationMethods: 2452 found = options->num_auth_methods == 0; 2453 value = 0; /* seen "any" pseudo-method */ 2454 value2 = 0; /* successfully parsed any method */ 2455 while ((arg = argv_next(&ac, &av)) != NULL) { 2456 if (strcmp(arg, "any") == 0) { 2457 if (options->num_auth_methods > 0) { 2458 fatal("%s line %d: \"any\" must " 2459 "appear alone in %s", 2460 filename, linenum, keyword); 2461 } 2462 value = 1; 2463 } else if (value) { 2464 fatal("%s line %d: \"any\" must appear " 2465 "alone in %s", filename, linenum, keyword); 2466 } else if (auth2_methods_valid(arg, 0) != 0) { 2467 fatal("%s line %d: invalid %s method list.", 2468 filename, linenum, keyword); 2469 } 2470 value2 = 1; 2471 if (!found || !*activep) 2472 continue; 2473 opt_array_append(filename, linenum, keyword, 2474 &options->auth_methods, 2475 &options->num_auth_methods, arg); 2476 } 2477 if (value2 == 0) { 2478 fatal("%s line %d: no %s specified", 2479 filename, linenum, keyword); 2480 } 2481 break; 2482 2483 case sStreamLocalBindMask: 2484 arg = argv_next(&ac, &av); 2485 if (!arg || *arg == '\0') 2486 fatal("%s line %d: %s missing argument.", 2487 filename, linenum, keyword); 2488 /* Parse mode in octal format */ 2489 value = strtol(arg, &p, 8); 2490 if (arg == p || value < 0 || value > 0777) 2491 fatal("%s line %d: Invalid %s.", 2492 filename, linenum, keyword); 2493 if (*activep) 2494 options->fwd_opts.streamlocal_bind_mask = (mode_t)value; 2495 break; 2496 2497 case sStreamLocalBindUnlink: 2498 intptr = &options->fwd_opts.streamlocal_bind_unlink; 2499 goto parse_flag; 2500 2501 case sFingerprintHash: 2502 arg = argv_next(&ac, &av); 2503 if (!arg || *arg == '\0') 2504 fatal("%s line %d: %s missing argument.", 2505 filename, linenum, keyword); 2506 if ((value = ssh_digest_alg_by_name(arg)) == -1) 2507 fatal("%.200s line %d: Invalid %s algorithm \"%s\".", 2508 filename, linenum, keyword, arg); 2509 if (*activep) 2510 options->fingerprint_hash = value; 2511 break; 2512 2513 case sExposeAuthInfo: 2514 intptr = &options->expose_userauth_info; 2515 goto parse_flag; 2516 2517 case sRDomain: 2518 #if !defined(__OpenBSD__) && !defined(HAVE_SYS_SET_PROCESS_RDOMAIN) 2519 fatal("%s line %d: setting RDomain not supported on this " 2520 "platform.", filename, linenum); 2521 #endif 2522 charptr = &options->routing_domain; 2523 arg = argv_next(&ac, &av); 2524 if (!arg || *arg == '\0') 2525 fatal("%s line %d: %s missing argument.", 2526 filename, linenum, keyword); 2527 if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 && 2528 !valid_rdomain(arg)) 2529 fatal("%s line %d: invalid routing domain", 2530 filename, linenum); 2531 if (*activep && *charptr == NULL) 2532 *charptr = xstrdup(arg); 2533 break; 2534 2535 case sRequiredRSASize: 2536 intptr = &options->required_rsa_size; 2537 goto parse_int; 2538 2539 case sChannelTimeout: 2540 uvalue = options->num_channel_timeouts; 2541 i = 0; 2542 while ((arg = argv_next(&ac, &av)) != NULL) { 2543 /* Allow "none" only in first position */ 2544 if (strcasecmp(arg, "none") == 0) { 2545 if (i > 0 || ac > 0) { 2546 error("%s line %d: keyword %s \"none\" " 2547 "argument must appear alone.", 2548 filename, linenum, keyword); 2549 goto out; 2550 } 2551 } else if (parse_timeout(arg, NULL, NULL) != 0) { 2552 fatal("%s line %d: invalid channel timeout %s", 2553 filename, linenum, arg); 2554 } 2555 if (!*activep || uvalue != 0) 2556 continue; 2557 opt_array_append(filename, linenum, keyword, 2558 &options->channel_timeouts, 2559 &options->num_channel_timeouts, arg); 2560 } 2561 break; 2562 2563 case sUnusedConnectionTimeout: 2564 intptr = &options->unused_connection_timeout; 2565 /* peek at first arg for "none" so we can reuse parse_time */ 2566 if (av[0] != NULL && strcasecmp(av[0], "none") == 0) { 2567 (void)argv_next(&ac, &av); /* consume arg */ 2568 if (*activep) 2569 *intptr = 0; 2570 break; 2571 } 2572 goto parse_time; 2573 2574 case sUseBlacklist: 2575 intptr = &options->use_blacklist; 2576 goto parse_flag; 2577 2578 case sDeprecated: 2579 case sIgnore: 2580 case sUnsupported: 2581 do_log2(opcode == sIgnore ? 2582 SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO, 2583 "%s line %d: %s option %s", filename, linenum, 2584 opcode == sUnsupported ? "Unsupported" : "Deprecated", 2585 keyword); 2586 argv_consume(&ac); 2587 break; 2588 2589 default: 2590 fatal("%s line %d: Missing handler for opcode %s (%d)", 2591 filename, linenum, keyword, opcode); 2592 } 2593 /* Check that there is no garbage at end of line. */ 2594 if (ac > 0) { 2595 error("%.200s line %d: keyword %s extra arguments " 2596 "at end of line", filename, linenum, keyword); 2597 goto out; 2598 } 2599 2600 /* success */ 2601 ret = 0; 2602 out: 2603 argv_free(oav, oac); 2604 return ret; 2605 } 2606 2607 int 2608 process_server_config_line(ServerOptions *options, char *line, 2609 const char *filename, int linenum, int *activep, 2610 struct connection_info *connectinfo, struct include_list *includes) 2611 { 2612 int inc_flags = 0; 2613 2614 return process_server_config_line_depth(options, line, filename, 2615 linenum, activep, connectinfo, &inc_flags, 0, includes); 2616 } 2617 2618 2619 /* Reads the server configuration file. */ 2620 2621 void 2622 load_server_config(const char *filename, struct sshbuf *conf) 2623 { 2624 struct stat st; 2625 char *line = NULL, *cp; 2626 size_t linesize = 0; 2627 FILE *f; 2628 int r; 2629 2630 debug2_f("filename %s", filename); 2631 if ((f = fopen(filename, "r")) == NULL) { 2632 perror(filename); 2633 exit(1); 2634 } 2635 sshbuf_reset(conf); 2636 /* grow buffer, so realloc is avoided for large config files */ 2637 if (fstat(fileno(f), &st) == 0 && st.st_size > 0 && 2638 (r = sshbuf_allocate(conf, st.st_size)) != 0) 2639 fatal_fr(r, "allocate"); 2640 while (getline(&line, &linesize, f) != -1) { 2641 /* 2642 * Strip whitespace 2643 * NB - preserve newlines, they are needed to reproduce 2644 * line numbers later for error messages 2645 */ 2646 cp = line + strspn(line, " \t\r"); 2647 if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0) 2648 fatal_fr(r, "sshbuf_put"); 2649 } 2650 free(line); 2651 if ((r = sshbuf_put_u8(conf, 0)) != 0) 2652 fatal_fr(r, "sshbuf_put_u8"); 2653 fclose(f); 2654 debug2_f("done config len = %zu", sshbuf_len(conf)); 2655 } 2656 2657 void 2658 parse_server_match_config(ServerOptions *options, 2659 struct include_list *includes, struct connection_info *connectinfo) 2660 { 2661 ServerOptions mo; 2662 2663 initialize_server_options(&mo); 2664 parse_server_config(&mo, "reprocess config", cfg, includes, 2665 connectinfo, 0); 2666 copy_set_server_options(options, &mo, 0); 2667 } 2668 2669 int parse_server_match_testspec(struct connection_info *ci, char *spec) 2670 { 2671 char *p; 2672 2673 while ((p = strsep(&spec, ",")) && *p != '\0') { 2674 if (strncmp(p, "addr=", 5) == 0) { 2675 ci->address = xstrdup(p + 5); 2676 } else if (strncmp(p, "host=", 5) == 0) { 2677 ci->host = xstrdup(p + 5); 2678 } else if (strncmp(p, "user=", 5) == 0) { 2679 ci->user = xstrdup(p + 5); 2680 } else if (strncmp(p, "laddr=", 6) == 0) { 2681 ci->laddress = xstrdup(p + 6); 2682 } else if (strncmp(p, "rdomain=", 8) == 0) { 2683 ci->rdomain = xstrdup(p + 8); 2684 } else if (strncmp(p, "lport=", 6) == 0) { 2685 ci->lport = a2port(p + 6); 2686 if (ci->lport == -1) { 2687 fprintf(stderr, "Invalid port '%s' in test mode" 2688 " specification %s\n", p+6, p); 2689 return -1; 2690 } 2691 } else { 2692 fprintf(stderr, "Invalid test mode specification %s\n", 2693 p); 2694 return -1; 2695 } 2696 } 2697 return 0; 2698 } 2699 2700 /* 2701 * Copy any supported values that are set. 2702 * 2703 * If the preauth flag is set, we do not bother copying the string or 2704 * array values that are not used pre-authentication, because any that we 2705 * do use must be explicitly sent in mm_getpwnamallow(). 2706 */ 2707 void 2708 copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) 2709 { 2710 #define M_CP_INTOPT(n) do {\ 2711 if (src->n != -1) \ 2712 dst->n = src->n; \ 2713 } while (0) 2714 2715 M_CP_INTOPT(password_authentication); 2716 M_CP_INTOPT(gss_authentication); 2717 M_CP_INTOPT(pubkey_authentication); 2718 M_CP_INTOPT(pubkey_auth_options); 2719 M_CP_INTOPT(kerberos_authentication); 2720 M_CP_INTOPT(hostbased_authentication); 2721 M_CP_INTOPT(hostbased_uses_name_from_packet_only); 2722 M_CP_INTOPT(kbd_interactive_authentication); 2723 M_CP_INTOPT(permit_root_login); 2724 M_CP_INTOPT(permit_empty_passwd); 2725 M_CP_INTOPT(ignore_rhosts); 2726 2727 M_CP_INTOPT(allow_tcp_forwarding); 2728 M_CP_INTOPT(allow_streamlocal_forwarding); 2729 M_CP_INTOPT(allow_agent_forwarding); 2730 M_CP_INTOPT(disable_forwarding); 2731 M_CP_INTOPT(expose_userauth_info); 2732 M_CP_INTOPT(permit_tun); 2733 M_CP_INTOPT(fwd_opts.gateway_ports); 2734 M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink); 2735 M_CP_INTOPT(x11_display_offset); 2736 M_CP_INTOPT(x11_forwarding); 2737 M_CP_INTOPT(x11_use_localhost); 2738 M_CP_INTOPT(permit_tty); 2739 M_CP_INTOPT(permit_user_rc); 2740 M_CP_INTOPT(max_sessions); 2741 M_CP_INTOPT(max_authtries); 2742 M_CP_INTOPT(client_alive_count_max); 2743 M_CP_INTOPT(client_alive_interval); 2744 M_CP_INTOPT(ip_qos_interactive); 2745 M_CP_INTOPT(ip_qos_bulk); 2746 M_CP_INTOPT(rekey_limit); 2747 M_CP_INTOPT(rekey_interval); 2748 M_CP_INTOPT(log_level); 2749 M_CP_INTOPT(required_rsa_size); 2750 M_CP_INTOPT(unused_connection_timeout); 2751 2752 /* 2753 * The bind_mask is a mode_t that may be unsigned, so we can't use 2754 * M_CP_INTOPT - it does a signed comparison that causes compiler 2755 * warnings. 2756 */ 2757 if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) { 2758 dst->fwd_opts.streamlocal_bind_mask = 2759 src->fwd_opts.streamlocal_bind_mask; 2760 } 2761 2762 /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */ 2763 #define M_CP_STROPT(n) do {\ 2764 if (src->n != NULL && dst->n != src->n) { \ 2765 free(dst->n); \ 2766 dst->n = src->n; \ 2767 } \ 2768 } while(0) 2769 #define M_CP_STRARRAYOPT(s, num_s) do {\ 2770 u_int i; \ 2771 if (src->num_s != 0) { \ 2772 for (i = 0; i < dst->num_s; i++) \ 2773 free(dst->s[i]); \ 2774 free(dst->s); \ 2775 dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \ 2776 for (i = 0; i < src->num_s; i++) \ 2777 dst->s[i] = xstrdup(src->s[i]); \ 2778 dst->num_s = src->num_s; \ 2779 } \ 2780 } while(0) 2781 2782 /* See comment in servconf.h */ 2783 COPY_MATCH_STRING_OPTS(); 2784 2785 /* Arguments that accept '+...' need to be expanded */ 2786 assemble_algorithms(dst); 2787 2788 /* 2789 * The only things that should be below this point are string options 2790 * which are only used after authentication. 2791 */ 2792 if (preauth) 2793 return; 2794 2795 /* These options may be "none" to clear a global setting */ 2796 M_CP_STROPT(adm_forced_command); 2797 if (option_clear_or_none(dst->adm_forced_command)) { 2798 free(dst->adm_forced_command); 2799 dst->adm_forced_command = NULL; 2800 } 2801 M_CP_STROPT(chroot_directory); 2802 if (option_clear_or_none(dst->chroot_directory)) { 2803 free(dst->chroot_directory); 2804 dst->chroot_directory = NULL; 2805 } 2806 } 2807 2808 #undef M_CP_INTOPT 2809 #undef M_CP_STROPT 2810 #undef M_CP_STRARRAYOPT 2811 2812 #define SERVCONF_MAX_DEPTH 16 2813 static void 2814 parse_server_config_depth(ServerOptions *options, const char *filename, 2815 struct sshbuf *conf, struct include_list *includes, 2816 struct connection_info *connectinfo, int flags, int *activep, int depth) 2817 { 2818 int linenum, bad_options = 0; 2819 char *cp, *obuf, *cbuf; 2820 2821 if (depth < 0 || depth > SERVCONF_MAX_DEPTH) 2822 fatal("Too many recursive configuration includes"); 2823 2824 debug2_f("config %s len %zu%s", filename, sshbuf_len(conf), 2825 (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : "")); 2826 2827 if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL) 2828 fatal_f("sshbuf_dup_string failed"); 2829 linenum = 1; 2830 while ((cp = strsep(&cbuf, "\n")) != NULL) { 2831 if (process_server_config_line_depth(options, cp, 2832 filename, linenum++, activep, connectinfo, &flags, 2833 depth, includes) != 0) 2834 bad_options++; 2835 } 2836 free(obuf); 2837 if (bad_options > 0) 2838 fatal("%s: terminating, %d bad configuration options", 2839 filename, bad_options); 2840 } 2841 2842 void 2843 parse_server_config(ServerOptions *options, const char *filename, 2844 struct sshbuf *conf, struct include_list *includes, 2845 struct connection_info *connectinfo, int reexec) 2846 { 2847 int active = connectinfo ? 0 : 1; 2848 parse_server_config_depth(options, filename, conf, includes, 2849 connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0); 2850 if (!reexec) 2851 process_queued_listen_addrs(options); 2852 } 2853 2854 static const char * 2855 fmt_multistate_int(int val, const struct multistate *m) 2856 { 2857 u_int i; 2858 2859 for (i = 0; m[i].key != NULL; i++) { 2860 if (m[i].value == val) 2861 return m[i].key; 2862 } 2863 return "UNKNOWN"; 2864 } 2865 2866 static const char * 2867 fmt_intarg(ServerOpCodes code, int val) 2868 { 2869 if (val == -1) 2870 return "unset"; 2871 switch (code) { 2872 case sAddressFamily: 2873 return fmt_multistate_int(val, multistate_addressfamily); 2874 case sPermitRootLogin: 2875 return fmt_multistate_int(val, multistate_permitrootlogin); 2876 case sGatewayPorts: 2877 return fmt_multistate_int(val, multistate_gatewayports); 2878 case sCompression: 2879 return fmt_multistate_int(val, multistate_compression); 2880 case sAllowTcpForwarding: 2881 return fmt_multistate_int(val, multistate_tcpfwd); 2882 case sAllowStreamLocalForwarding: 2883 return fmt_multistate_int(val, multistate_tcpfwd); 2884 case sIgnoreRhosts: 2885 return fmt_multistate_int(val, multistate_ignore_rhosts); 2886 case sFingerprintHash: 2887 return ssh_digest_alg_name(val); 2888 default: 2889 switch (val) { 2890 case 0: 2891 return "no"; 2892 case 1: 2893 return "yes"; 2894 default: 2895 return "UNKNOWN"; 2896 } 2897 } 2898 } 2899 2900 static void 2901 dump_cfg_int(ServerOpCodes code, int val) 2902 { 2903 if (code == sUnusedConnectionTimeout && val == 0) { 2904 printf("%s none\n", lookup_opcode_name(code)); 2905 return; 2906 } 2907 printf("%s %d\n", lookup_opcode_name(code), val); 2908 } 2909 2910 static void 2911 dump_cfg_oct(ServerOpCodes code, int val) 2912 { 2913 printf("%s 0%o\n", lookup_opcode_name(code), val); 2914 } 2915 2916 static void 2917 dump_cfg_fmtint(ServerOpCodes code, int val) 2918 { 2919 printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); 2920 } 2921 2922 static void 2923 dump_cfg_string(ServerOpCodes code, const char *val) 2924 { 2925 printf("%s %s\n", lookup_opcode_name(code), 2926 val == NULL ? "none" : val); 2927 } 2928 2929 static void 2930 dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals) 2931 { 2932 u_int i; 2933 2934 for (i = 0; i < count; i++) 2935 printf("%s %s\n", lookup_opcode_name(code), vals[i]); 2936 } 2937 2938 static void 2939 dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals) 2940 { 2941 u_int i; 2942 2943 switch (code) { 2944 case sAuthenticationMethods: 2945 case sChannelTimeout: 2946 break; 2947 default: 2948 if (count <= 0) 2949 return; 2950 break; 2951 } 2952 2953 printf("%s", lookup_opcode_name(code)); 2954 for (i = 0; i < count; i++) 2955 printf(" %s", vals[i]); 2956 if (code == sAuthenticationMethods && count == 0) 2957 printf(" any"); 2958 else if (code == sChannelTimeout && count == 0) 2959 printf(" none"); 2960 printf("\n"); 2961 } 2962 2963 static char * 2964 format_listen_addrs(struct listenaddr *la) 2965 { 2966 int r; 2967 struct addrinfo *ai; 2968 char addr[NI_MAXHOST], port[NI_MAXSERV]; 2969 char *laddr1 = xstrdup(""), *laddr2 = NULL; 2970 2971 /* 2972 * ListenAddress must be after Port. add_one_listen_addr pushes 2973 * addresses onto a stack, so to maintain ordering we need to 2974 * print these in reverse order. 2975 */ 2976 for (ai = la->addrs; ai; ai = ai->ai_next) { 2977 if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, 2978 sizeof(addr), port, sizeof(port), 2979 NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { 2980 error("getnameinfo: %.100s", ssh_gai_strerror(r)); 2981 continue; 2982 } 2983 laddr2 = laddr1; 2984 if (ai->ai_family == AF_INET6) { 2985 xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s", 2986 addr, port, 2987 la->rdomain == NULL ? "" : " rdomain ", 2988 la->rdomain == NULL ? "" : la->rdomain, 2989 laddr2); 2990 } else { 2991 xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s", 2992 addr, port, 2993 la->rdomain == NULL ? "" : " rdomain ", 2994 la->rdomain == NULL ? "" : la->rdomain, 2995 laddr2); 2996 } 2997 free(laddr2); 2998 } 2999 return laddr1; 3000 } 3001 3002 void 3003 dump_config(ServerOptions *o) 3004 { 3005 char *s; 3006 u_int i; 3007 3008 /* these are usually at the top of the config */ 3009 for (i = 0; i < o->num_ports; i++) 3010 printf("port %d\n", o->ports[i]); 3011 dump_cfg_fmtint(sAddressFamily, o->address_family); 3012 3013 for (i = 0; i < o->num_listen_addrs; i++) { 3014 s = format_listen_addrs(&o->listen_addrs[i]); 3015 printf("%s", s); 3016 free(s); 3017 } 3018 3019 /* integer arguments */ 3020 #ifdef USE_PAM 3021 dump_cfg_fmtint(sUsePAM, o->use_pam); 3022 #endif 3023 dump_cfg_int(sLoginGraceTime, o->login_grace_time); 3024 dump_cfg_int(sX11DisplayOffset, o->x11_display_offset); 3025 dump_cfg_int(sMaxAuthTries, o->max_authtries); 3026 dump_cfg_int(sMaxSessions, o->max_sessions); 3027 dump_cfg_int(sClientAliveInterval, o->client_alive_interval); 3028 dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); 3029 dump_cfg_int(sRequiredRSASize, o->required_rsa_size); 3030 dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask); 3031 dump_cfg_int(sUnusedConnectionTimeout, o->unused_connection_timeout); 3032 3033 /* formatted integer arguments */ 3034 dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); 3035 dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts); 3036 dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts); 3037 dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication); 3038 dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly, 3039 o->hostbased_uses_name_from_packet_only); 3040 dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication); 3041 #ifdef KRB5 3042 dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication); 3043 dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd); 3044 dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup); 3045 # ifdef USE_AFS 3046 dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token); 3047 # endif 3048 #endif 3049 #ifdef GSSAPI 3050 dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); 3051 dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); 3052 #endif 3053 dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); 3054 dump_cfg_fmtint(sKbdInteractiveAuthentication, 3055 o->kbd_interactive_authentication); 3056 dump_cfg_fmtint(sPrintMotd, o->print_motd); 3057 #ifndef DISABLE_LASTLOG 3058 dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); 3059 #endif 3060 dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); 3061 dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); 3062 dump_cfg_fmtint(sPermitTTY, o->permit_tty); 3063 dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc); 3064 dump_cfg_fmtint(sStrictModes, o->strict_modes); 3065 dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); 3066 dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); 3067 dump_cfg_fmtint(sCompression, o->compression); 3068 dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports); 3069 dump_cfg_fmtint(sUseDNS, o->use_dns); 3070 dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); 3071 dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding); 3072 dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding); 3073 dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding); 3074 dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink); 3075 dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash); 3076 dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info); 3077 dump_cfg_fmtint(sUseBlacklist, o->use_blacklist); 3078 3079 /* string arguments */ 3080 dump_cfg_string(sPidFile, o->pid_file); 3081 dump_cfg_string(sModuliFile, o->moduli_file); 3082 dump_cfg_string(sXAuthLocation, o->xauth_location); 3083 dump_cfg_string(sCiphers, o->ciphers); 3084 dump_cfg_string(sMacs, o->macs); 3085 dump_cfg_string(sBanner, o->banner); 3086 dump_cfg_string(sForceCommand, o->adm_forced_command); 3087 dump_cfg_string(sChrootDirectory, o->chroot_directory); 3088 dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys); 3089 dump_cfg_string(sRevokedKeys, o->revoked_keys_file); 3090 dump_cfg_string(sSecurityKeyProvider, o->sk_provider); 3091 dump_cfg_string(sAuthorizedPrincipalsFile, 3092 o->authorized_principals_file); 3093 dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0' 3094 ? "none" : o->version_addendum); 3095 dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command); 3096 dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user); 3097 dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command); 3098 dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user); 3099 dump_cfg_string(sHostKeyAgent, o->host_key_agent); 3100 dump_cfg_string(sKexAlgorithms, o->kex_algorithms); 3101 dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms); 3102 dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos); 3103 dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms); 3104 dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos); 3105 #if defined(__OpenBSD__) || defined(HAVE_SYS_SET_PROCESS_RDOMAIN) 3106 dump_cfg_string(sRDomain, o->routing_domain); 3107 #endif 3108 3109 /* string arguments requiring a lookup */ 3110 dump_cfg_string(sLogLevel, log_level_name(o->log_level)); 3111 dump_cfg_string(sLogFacility, log_facility_name(o->log_facility)); 3112 3113 /* string array arguments */ 3114 dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files, 3115 o->authorized_keys_files); 3116 dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, 3117 o->host_key_files); 3118 dump_cfg_strarray(sHostCertificate, o->num_host_cert_files, 3119 o->host_cert_files); 3120 dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); 3121 dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); 3122 dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); 3123 dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); 3124 dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); 3125 dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv); 3126 dump_cfg_strarray_oneline(sAuthenticationMethods, 3127 o->num_auth_methods, o->auth_methods); 3128 dump_cfg_strarray_oneline(sLogVerbose, 3129 o->num_log_verbose, o->log_verbose); 3130 dump_cfg_strarray_oneline(sChannelTimeout, 3131 o->num_channel_timeouts, o->channel_timeouts); 3132 3133 /* other arguments */ 3134 for (i = 0; i < o->num_subsystems; i++) 3135 printf("subsystem %s %s\n", o->subsystem_name[i], 3136 o->subsystem_args[i]); 3137 3138 printf("maxstartups %d:%d:%d\n", o->max_startups_begin, 3139 o->max_startups_rate, o->max_startups); 3140 printf("persourcemaxstartups "); 3141 if (o->per_source_max_startups == INT_MAX) 3142 printf("none\n"); 3143 else 3144 printf("%d\n", o->per_source_max_startups); 3145 printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4, 3146 o->per_source_masklen_ipv6); 3147 3148 s = NULL; 3149 for (i = 0; tunmode_desc[i].val != -1; i++) { 3150 if (tunmode_desc[i].val == o->permit_tun) { 3151 s = tunmode_desc[i].text; 3152 break; 3153 } 3154 } 3155 dump_cfg_string(sPermitTunnel, s); 3156 3157 printf("ipqos %s ", iptos2str(o->ip_qos_interactive)); 3158 printf("%s\n", iptos2str(o->ip_qos_bulk)); 3159 3160 printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit, 3161 o->rekey_interval); 3162 3163 printf("permitopen"); 3164 if (o->num_permitted_opens == 0) 3165 printf(" any"); 3166 else { 3167 for (i = 0; i < o->num_permitted_opens; i++) 3168 printf(" %s", o->permitted_opens[i]); 3169 } 3170 printf("\n"); 3171 printf("permitlisten"); 3172 if (o->num_permitted_listens == 0) 3173 printf(" any"); 3174 else { 3175 for (i = 0; i < o->num_permitted_listens; i++) 3176 printf(" %s", o->permitted_listens[i]); 3177 } 3178 printf("\n"); 3179 3180 if (o->permit_user_env_allowlist == NULL) { 3181 dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); 3182 } else { 3183 printf("permituserenvironment %s\n", 3184 o->permit_user_env_allowlist); 3185 } 3186 3187 printf("pubkeyauthoptions"); 3188 if (o->pubkey_auth_options == 0) 3189 printf(" none"); 3190 if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED) 3191 printf(" touch-required"); 3192 if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED) 3193 printf(" verify-required"); 3194 printf("\n"); 3195 } 3196