Annotation of src/usr.bin/ssh/servconf.c, Revision 1.291
1.226 dtucker 1:
1.291 ! djm 2: /* $OpenBSD: servconf.c,v 1.290 2016/05/04 14:00:09 dtucker Exp $ */
1.1 deraadt 3: /*
1.26 deraadt 4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.34 markus 6: *
1.51 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 12: */
1.1 deraadt 13:
1.152 stevesk 14: #include <sys/types.h>
15: #include <sys/socket.h>
1.179 djm 16: #include <sys/queue.h>
1.154 stevesk 17:
1.213 djm 18: #include <netinet/in.h>
19: #include <netinet/ip.h>
20:
1.235 dtucker 21: #include <ctype.h>
1.154 stevesk 22: #include <netdb.h>
1.165 dtucker 23: #include <pwd.h>
1.162 stevesk 24: #include <stdio.h>
1.161 stevesk 25: #include <stdlib.h>
1.160 stevesk 26: #include <string.h>
1.164 deraadt 27: #include <signal.h>
1.155 stevesk 28: #include <unistd.h>
1.259 deraadt 29: #include <limits.h>
1.164 deraadt 30: #include <stdarg.h>
1.182 dtucker 31: #include <errno.h>
1.236 dtucker 32: #include <util.h>
1.1 deraadt 33:
1.164 deraadt 34: #include "xmalloc.h"
1.1 deraadt 35: #include "ssh.h"
1.62 markus 36: #include "log.h"
1.164 deraadt 37: #include "buffer.h"
1.251 millert 38: #include "misc.h"
1.1 deraadt 39: #include "servconf.h"
1.33 markus 40: #include "compat.h"
1.60 markus 41: #include "pathnames.h"
1.62 markus 42: #include "cipher.h"
1.164 deraadt 43: #include "key.h"
1.66 markus 44: #include "kex.h"
45: #include "mac.h"
1.153 dtucker 46: #include "match.h"
1.156 dtucker 47: #include "channels.h"
1.165 dtucker 48: #include "groupaccess.h"
1.226 dtucker 49: #include "canohost.h"
50: #include "packet.h"
1.232 djm 51: #include "hostfile.h"
52: #include "auth.h"
1.252 djm 53: #include "myproposal.h"
1.256 djm 54: #include "digest.h"
1.1 deraadt 55:
1.194 djm 56: static void add_listen_addr(ServerOptions *, char *, int);
57: static void add_one_listen_addr(ServerOptions *, char *, int);
1.29 markus 58:
1.102 provos 59: /* Use of privilege separation or not */
60: extern int use_privsep;
1.153 dtucker 61: extern Buffer cfg;
1.62 markus 62:
1.1 deraadt 63: /* Initializes the server options to their default values. */
64:
1.34 markus 65: void
1.25 markus 66: initialize_server_options(ServerOptions *options)
1.1 deraadt 67: {
1.25 markus 68: memset(options, 0, sizeof(*options));
1.29 markus 69: options->num_ports = 0;
70: options->ports_from_cmdline = 0;
1.266 dtucker 71: options->queued_listen_addrs = NULL;
72: options->num_queued_listens = 0;
1.29 markus 73: options->listen_addrs = NULL;
1.138 djm 74: options->address_family = -1;
1.54 markus 75: options->num_host_key_files = 0;
1.203 djm 76: options->num_host_cert_files = 0;
1.240 markus 77: options->host_key_agent = NULL;
1.36 markus 78: options->pid_file = NULL;
1.25 markus 79: options->server_key_bits = -1;
80: options->login_grace_time = -1;
81: options->key_regeneration_time = -1;
1.279 chris 82: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 83: options->ignore_rhosts = -1;
84: options->ignore_user_known_hosts = -1;
85: options->print_motd = -1;
1.72 stevesk 86: options->print_lastlog = -1;
1.25 markus 87: options->x11_forwarding = -1;
88: options->x11_display_offset = -1;
1.99 stevesk 89: options->x11_use_localhost = -1;
1.244 djm 90: options->permit_tty = -1;
1.250 djm 91: options->permit_user_rc = -1;
1.42 markus 92: options->xauth_location = NULL;
1.25 markus 93: options->strict_modes = -1;
1.129 markus 94: options->tcp_keep_alive = -1;
1.101 markus 95: options->log_facility = SYSLOG_FACILITY_NOT_SET;
96: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 97: options->rhosts_rsa_authentication = -1;
1.75 markus 98: options->hostbased_authentication = -1;
99: options->hostbased_uses_name_from_packet_only = -1;
1.258 djm 100: options->hostbased_key_types = NULL;
1.276 markus 101: options->hostkeyalgorithms = NULL;
1.25 markus 102: options->rsa_authentication = -1;
1.54 markus 103: options->pubkey_authentication = -1;
1.258 djm 104: options->pubkey_key_types = NULL;
1.25 markus 105: options->kerberos_authentication = -1;
106: options->kerberos_or_local_passwd = -1;
107: options->kerberos_ticket_cleanup = -1;
1.130 jakob 108: options->kerberos_get_afs_token = -1;
1.125 markus 109: options->gss_authentication=-1;
110: options->gss_cleanup_creds = -1;
1.271 djm 111: options->gss_strict_acceptor = -1;
1.25 markus 112: options->password_authentication = -1;
1.52 markus 113: options->kbd_interactive_authentication = -1;
1.80 markus 114: options->challenge_response_authentication = -1;
1.25 markus 115: options->permit_empty_passwd = -1;
1.113 markus 116: options->permit_user_env = -1;
1.25 markus 117: options->use_login = -1;
1.111 markus 118: options->compression = -1;
1.235 dtucker 119: options->rekey_limit = -1;
120: options->rekey_interval = -1;
1.53 markus 121: options->allow_tcp_forwarding = -1;
1.251 millert 122: options->allow_streamlocal_forwarding = -1;
1.178 pyr 123: options->allow_agent_forwarding = -1;
1.25 markus 124: options->num_allow_users = 0;
125: options->num_deny_users = 0;
126: options->num_allow_groups = 0;
127: options->num_deny_groups = 0;
1.33 markus 128: options->ciphers = NULL;
1.66 markus 129: options->macs = NULL;
1.211 djm 130: options->kex_algorithms = NULL;
1.33 markus 131: options->protocol = SSH_PROTO_UNKNOWN;
1.251 millert 132: options->fwd_opts.gateway_ports = -1;
133: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
134: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 135: options->num_subsystems = 0;
1.50 markus 136: options->max_startups_begin = -1;
137: options->max_startups_rate = -1;
1.46 markus 138: options->max_startups = -1;
1.133 dtucker 139: options->max_authtries = -1;
1.180 djm 140: options->max_sessions = -1;
1.57 markus 141: options->banner = NULL;
1.122 markus 142: options->use_dns = -1;
1.77 beck 143: options->client_alive_interval = -1;
144: options->client_alive_count_max = -1;
1.219 djm 145: options->num_authkeys_files = 0;
1.131 djm 146: options->num_accept_env = 0;
1.145 reyk 147: options->permit_tun = -1;
1.159 dtucker 148: options->num_permitted_opens = -1;
1.158 dtucker 149: options->adm_forced_command = NULL;
1.176 djm 150: options->chroot_directory = NULL;
1.231 djm 151: options->authorized_keys_command = NULL;
152: options->authorized_keys_command_user = NULL;
1.204 djm 153: options->revoked_keys_file = NULL;
154: options->trusted_user_ca_keys = NULL;
1.208 djm 155: options->authorized_principals_file = NULL;
1.270 djm 156: options->authorized_principals_command = NULL;
157: options->authorized_principals_command_user = NULL;
1.213 djm 158: options->ip_qos_interactive = -1;
159: options->ip_qos_bulk = -1;
1.225 djm 160: options->version_addendum = NULL;
1.256 djm 161: options->fingerprint_hash = -1;
1.1 deraadt 162: }
163:
1.257 djm 164: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
165: static int
166: option_clear_or_none(const char *o)
167: {
168: return o == NULL || strcasecmp(o, "none") == 0;
169: }
170:
1.282 djm 171: static void
172: assemble_algorithms(ServerOptions *o)
173: {
174: if (kex_assemble_names(KEX_SERVER_ENCRYPT, &o->ciphers) != 0 ||
175: kex_assemble_names(KEX_SERVER_MAC, &o->macs) != 0 ||
176: kex_assemble_names(KEX_SERVER_KEX, &o->kex_algorithms) != 0 ||
177: kex_assemble_names(KEX_DEFAULT_PK_ALG,
178: &o->hostkeyalgorithms) != 0 ||
179: kex_assemble_names(KEX_DEFAULT_PK_ALG,
180: &o->hostbased_key_types) != 0 ||
181: kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->pubkey_key_types) != 0)
182: fatal("kex_assemble_names failed");
183: }
184:
1.34 markus 185: void
1.25 markus 186: fill_default_server_options(ServerOptions *options)
1.1 deraadt 187: {
1.257 djm 188: int i;
189:
1.54 markus 190: if (options->protocol == SSH_PROTO_UNKNOWN)
1.196 markus 191: options->protocol = SSH_PROTO_2;
1.54 markus 192: if (options->num_host_key_files == 0) {
193: /* fill default hostkeys for protocols */
194: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 195: options->host_key_files[options->num_host_key_files++] =
196: _PATH_HOST_KEY_FILE;
197: if (options->protocol & SSH_PROTO_2) {
198: options->host_key_files[options->num_host_key_files++] =
199: _PATH_HOST_RSA_KEY_FILE;
200: options->host_key_files[options->num_host_key_files++] =
201: _PATH_HOST_DSA_KEY_FILE;
1.210 naddy 202: options->host_key_files[options->num_host_key_files++] =
203: _PATH_HOST_ECDSA_KEY_FILE;
1.248 markus 204: options->host_key_files[options->num_host_key_files++] =
205: _PATH_HOST_ED25519_KEY_FILE;
1.97 stevesk 206: }
1.54 markus 207: }
1.203 djm 208: /* No certificates by default */
1.29 markus 209: if (options->num_ports == 0)
210: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 211: if (options->address_family == -1)
212: options->address_family = AF_UNSPEC;
1.29 markus 213: if (options->listen_addrs == NULL)
1.76 stevesk 214: add_listen_addr(options, NULL, 0);
1.36 markus 215: if (options->pid_file == NULL)
1.257 djm 216: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 217: if (options->server_key_bits == -1)
1.185 djm 218: options->server_key_bits = 1024;
1.25 markus 219: if (options->login_grace_time == -1)
1.115 stevesk 220: options->login_grace_time = 120;
1.25 markus 221: if (options->key_regeneration_time == -1)
222: options->key_regeneration_time = 3600;
1.67 markus 223: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 224: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 225: if (options->ignore_rhosts == -1)
1.30 markus 226: options->ignore_rhosts = 1;
1.25 markus 227: if (options->ignore_user_known_hosts == -1)
228: options->ignore_user_known_hosts = 0;
229: if (options->print_motd == -1)
230: options->print_motd = 1;
1.72 stevesk 231: if (options->print_lastlog == -1)
232: options->print_lastlog = 1;
1.25 markus 233: if (options->x11_forwarding == -1)
1.30 markus 234: options->x11_forwarding = 0;
1.25 markus 235: if (options->x11_display_offset == -1)
1.30 markus 236: options->x11_display_offset = 10;
1.99 stevesk 237: if (options->x11_use_localhost == -1)
238: options->x11_use_localhost = 1;
1.42 markus 239: if (options->xauth_location == NULL)
1.257 djm 240: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 241: if (options->permit_tty == -1)
242: options->permit_tty = 1;
1.250 djm 243: if (options->permit_user_rc == -1)
244: options->permit_user_rc = 1;
1.25 markus 245: if (options->strict_modes == -1)
246: options->strict_modes = 1;
1.129 markus 247: if (options->tcp_keep_alive == -1)
248: options->tcp_keep_alive = 1;
1.101 markus 249: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 250: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 251: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 252: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 253: if (options->rhosts_rsa_authentication == -1)
1.30 markus 254: options->rhosts_rsa_authentication = 0;
1.75 markus 255: if (options->hostbased_authentication == -1)
256: options->hostbased_authentication = 0;
257: if (options->hostbased_uses_name_from_packet_only == -1)
258: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 259: if (options->rsa_authentication == -1)
260: options->rsa_authentication = 1;
1.54 markus 261: if (options->pubkey_authentication == -1)
262: options->pubkey_authentication = 1;
1.25 markus 263: if (options->kerberos_authentication == -1)
1.107 markus 264: options->kerberos_authentication = 0;
1.25 markus 265: if (options->kerberos_or_local_passwd == -1)
266: options->kerberos_or_local_passwd = 1;
267: if (options->kerberos_ticket_cleanup == -1)
268: options->kerberos_ticket_cleanup = 1;
1.130 jakob 269: if (options->kerberos_get_afs_token == -1)
270: options->kerberos_get_afs_token = 0;
1.125 markus 271: if (options->gss_authentication == -1)
272: options->gss_authentication = 0;
273: if (options->gss_cleanup_creds == -1)
274: options->gss_cleanup_creds = 1;
1.271 djm 275: if (options->gss_strict_acceptor == -1)
276: options->gss_strict_acceptor = 0;
1.25 markus 277: if (options->password_authentication == -1)
278: options->password_authentication = 1;
1.52 markus 279: if (options->kbd_interactive_authentication == -1)
280: options->kbd_interactive_authentication = 0;
1.80 markus 281: if (options->challenge_response_authentication == -1)
282: options->challenge_response_authentication = 1;
1.25 markus 283: if (options->permit_empty_passwd == -1)
1.30 markus 284: options->permit_empty_passwd = 0;
1.113 markus 285: if (options->permit_user_env == -1)
286: options->permit_user_env = 0;
1.25 markus 287: if (options->use_login == -1)
288: options->use_login = 0;
1.111 markus 289: if (options->compression == -1)
1.143 markus 290: options->compression = COMP_DELAYED;
1.235 dtucker 291: if (options->rekey_limit == -1)
292: options->rekey_limit = 0;
293: if (options->rekey_interval == -1)
294: options->rekey_interval = 0;
1.53 markus 295: if (options->allow_tcp_forwarding == -1)
1.233 djm 296: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 297: if (options->allow_streamlocal_forwarding == -1)
298: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 299: if (options->allow_agent_forwarding == -1)
300: options->allow_agent_forwarding = 1;
1.251 millert 301: if (options->fwd_opts.gateway_ports == -1)
302: options->fwd_opts.gateway_ports = 0;
1.46 markus 303: if (options->max_startups == -1)
1.234 dtucker 304: options->max_startups = 100;
1.50 markus 305: if (options->max_startups_rate == -1)
1.234 dtucker 306: options->max_startups_rate = 30; /* 30% */
1.50 markus 307: if (options->max_startups_begin == -1)
1.234 dtucker 308: options->max_startups_begin = 10;
1.133 dtucker 309: if (options->max_authtries == -1)
310: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 311: if (options->max_sessions == -1)
312: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 313: if (options->use_dns == -1)
1.260 deraadt 314: options->use_dns = 0;
1.77 beck 315: if (options->client_alive_interval == -1)
1.95 deraadt 316: options->client_alive_interval = 0;
1.77 beck 317: if (options->client_alive_count_max == -1)
318: options->client_alive_count_max = 3;
1.219 djm 319: if (options->num_authkeys_files == 0) {
320: options->authorized_keys_files[options->num_authkeys_files++] =
321: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS);
322: options->authorized_keys_files[options->num_authkeys_files++] =
323: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS2);
324: }
1.145 reyk 325: if (options->permit_tun == -1)
1.146 reyk 326: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 327: if (options->ip_qos_interactive == -1)
328: options->ip_qos_interactive = IPTOS_LOWDELAY;
329: if (options->ip_qos_bulk == -1)
330: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 331: if (options->version_addendum == NULL)
332: options->version_addendum = xstrdup("");
1.251 millert 333: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
334: options->fwd_opts.streamlocal_bind_mask = 0177;
335: if (options->fwd_opts.streamlocal_bind_unlink == -1)
336: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 337: if (options->fingerprint_hash == -1)
338: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.277 djm 339:
1.282 djm 340: assemble_algorithms(options);
1.277 djm 341:
1.285 djm 342: /* Turn privilege separation and sandboxing on by default */
1.102 provos 343: if (use_privsep == -1)
1.285 djm 344: use_privsep = PRIVSEP_ON;
1.257 djm 345:
346: #define CLEAR_ON_NONE(v) \
347: do { \
348: if (option_clear_or_none(v)) { \
349: free(v); \
350: v = NULL; \
351: } \
352: } while(0)
353: CLEAR_ON_NONE(options->pid_file);
354: CLEAR_ON_NONE(options->xauth_location);
355: CLEAR_ON_NONE(options->banner);
356: CLEAR_ON_NONE(options->trusted_user_ca_keys);
357: CLEAR_ON_NONE(options->revoked_keys_file);
1.267 djm 358: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 359: CLEAR_ON_NONE(options->adm_forced_command);
360: CLEAR_ON_NONE(options->chroot_directory);
1.257 djm 361: for (i = 0; i < options->num_host_key_files; i++)
362: CLEAR_ON_NONE(options->host_key_files[i]);
363: for (i = 0; i < options->num_host_cert_files; i++)
364: CLEAR_ON_NONE(options->host_cert_files[i]);
365: #undef CLEAR_ON_NONE
1.291 ! djm 366:
! 367: /* Similar handling for AuthenticationMethods=any */
! 368: if (options->num_auth_methods == 1 &&
! 369: strcmp(options->auth_methods[0], "any") == 0) {
! 370: free(options->auth_methods[0]);
! 371: options->auth_methods[0] = NULL;
! 372: options->num_auth_methods = 0;
! 373: }
! 374:
1.1 deraadt 375: }
376:
377: /* Keyword tokens. */
1.25 markus 378: typedef enum {
379: sBadOption, /* == unknown option */
1.258 djm 380: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime,
381: sKeyRegenerationTime, sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 382: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 383: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 384: sKerberosGetAFSToken,
1.123 markus 385: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 386: sPasswordAuthentication, sKbdInteractiveAuthentication,
387: sListenAddress, sAddressFamily,
1.72 stevesk 388: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 389: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 390: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 391: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.235 dtucker 392: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 393: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.258 djm 394: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
395: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 396: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 397: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 398: sHostKeyAlgorithms,
1.258 djm 399: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 400: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
401: sAcceptEnv, sPermitTunnel,
1.176 djm 402: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 403: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.249 djm 404: sHostCertificate,
1.208 djm 405: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 406: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.225 djm 407: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 408: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 409: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 410: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.256 djm 411: sAllowStreamLocalForwarding, sFingerprintHash,
1.121 jakob 412: sDeprecated, sUnsupported
1.1 deraadt 413: } ServerOpCodes;
414:
1.153 dtucker 415: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
416: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
417: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
418:
1.1 deraadt 419: /* Textual representation of the tokens. */
1.25 markus 420: static struct {
421: const char *name;
422: ServerOpCodes opcode;
1.153 dtucker 423: u_int flags;
1.25 markus 424: } keywords[] = {
1.153 dtucker 425: { "port", sPort, SSHCFG_GLOBAL },
426: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
427: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 428: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 429: { "pidfile", sPidFile, SSHCFG_GLOBAL },
430: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
431: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
432: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
1.175 dtucker 433: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 434: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
435: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
436: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.168 dtucker 437: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL },
438: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 439: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 440: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 441: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.168 dtucker 442: { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL },
443: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 444: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.153 dtucker 445: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 446: #ifdef KRB5
1.168 dtucker 447: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 448: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
449: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
450: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 451: #else
1.168 dtucker 452: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 453: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
454: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
455: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 456: #endif
1.153 dtucker 457: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
458: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 459: #ifdef GSSAPI
1.168 dtucker 460: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 461: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 462: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 463: #else
1.168 dtucker 464: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 465: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 466: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 467: #endif
1.168 dtucker 468: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
469: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 470: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 471: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
472: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
473: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
474: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
475: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
476: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
477: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
478: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 479: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
480: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
481: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 482: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
483: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 484: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 485: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
486: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
487: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 488: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 489: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
490: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
491: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 492: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 493: { "allowusers", sAllowUsers, SSHCFG_ALL },
494: { "denyusers", sDenyUsers, SSHCFG_ALL },
495: { "allowgroups", sAllowGroups, SSHCFG_ALL },
496: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 497: { "ciphers", sCiphers, SSHCFG_GLOBAL },
498: { "macs", sMacs, SSHCFG_GLOBAL },
499: { "protocol", sProtocol, SSHCFG_GLOBAL },
500: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
501: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
502: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 503: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 504: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 505: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 506: { "usedns", sUseDNS, SSHCFG_GLOBAL },
507: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
508: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
509: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
510: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
1.209 djm 511: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 512: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.153 dtucker 513: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
1.227 markus 514: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 515: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 516: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 517: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 518: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 519: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 520: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 521: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 522: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 523: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
524: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 525: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 526: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 527: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 528: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
529: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 530: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
531: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 532: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 533: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 534: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
535: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
536: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 537: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.153 dtucker 538: { NULL, sBadOption, 0 }
1.1 deraadt 539: };
540:
1.182 dtucker 541: static struct {
542: int val;
543: char *text;
544: } tunmode_desc[] = {
545: { SSH_TUNMODE_NO, "no" },
546: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
547: { SSH_TUNMODE_ETHERNET, "ethernet" },
548: { SSH_TUNMODE_YES, "yes" },
549: { -1, NULL }
550: };
551:
1.27 markus 552: /*
1.73 stevesk 553: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 554: */
1.1 deraadt 555:
1.34 markus 556: static ServerOpCodes
1.25 markus 557: parse_token(const char *cp, const char *filename,
1.153 dtucker 558: int linenum, u_int *flags)
1.1 deraadt 559: {
1.55 markus 560: u_int i;
1.1 deraadt 561:
1.25 markus 562: for (i = 0; keywords[i].name; i++)
1.153 dtucker 563: if (strcasecmp(cp, keywords[i].name) == 0) {
564: *flags = keywords[i].flags;
1.25 markus 565: return keywords[i].opcode;
1.153 dtucker 566: }
1.25 markus 567:
1.78 stevesk 568: error("%s: line %d: Bad configuration option: %s",
569: filename, linenum, cp);
1.25 markus 570: return sBadOption;
1.1 deraadt 571: }
572:
1.202 djm 573: char *
574: derelativise_path(const char *path)
575: {
1.259 deraadt 576: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 577:
1.257 djm 578: if (strcasecmp(path, "none") == 0)
579: return xstrdup("none");
1.202 djm 580: expanded = tilde_expand_filename(path, getuid());
581: if (*expanded == '/')
582: return expanded;
1.207 djm 583: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 584: fatal("%s: getcwd: %s", __func__, strerror(errno));
585: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 586: free(expanded);
1.202 djm 587: return ret;
588: }
589:
1.84 itojun 590: static void
1.194 djm 591: add_listen_addr(ServerOptions *options, char *addr, int port)
1.74 stevesk 592: {
1.142 djm 593: u_int i;
1.74 stevesk 594:
1.76 stevesk 595: if (port == 0)
1.74 stevesk 596: for (i = 0; i < options->num_ports; i++)
597: add_one_listen_addr(options, addr, options->ports[i]);
598: else
1.76 stevesk 599: add_one_listen_addr(options, addr, port);
1.74 stevesk 600: }
601:
1.84 itojun 602: static void
1.194 djm 603: add_one_listen_addr(ServerOptions *options, char *addr, int port)
1.29 markus 604: {
605: struct addrinfo hints, *ai, *aitop;
606: char strport[NI_MAXSERV];
607: int gaierr;
608:
1.74 stevesk 609: memset(&hints, 0, sizeof(hints));
1.138 djm 610: hints.ai_family = options->address_family;
1.74 stevesk 611: hints.ai_socktype = SOCK_STREAM;
612: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 613: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 614: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
615: fatal("bad addr or host: %s (%s)",
616: addr ? addr : "<NULL>",
1.173 dtucker 617: ssh_gai_strerror(gaierr));
1.74 stevesk 618: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
619: ;
620: ai->ai_next = options->listen_addrs;
621: options->listen_addrs = aitop;
1.29 markus 622: }
623:
1.266 dtucker 624: /*
625: * Queue a ListenAddress to be processed once we have all of the Ports
626: * and AddressFamily options.
627: */
628: static void
629: queue_listen_addr(ServerOptions *options, char *addr, int port)
630: {
631: options->queued_listen_addrs = xreallocarray(
632: options->queued_listen_addrs, options->num_queued_listens + 1,
633: sizeof(addr));
634: options->queued_listen_ports = xreallocarray(
635: options->queued_listen_ports, options->num_queued_listens + 1,
636: sizeof(port));
637: options->queued_listen_addrs[options->num_queued_listens] =
638: xstrdup(addr);
639: options->queued_listen_ports[options->num_queued_listens] = port;
640: options->num_queued_listens++;
641: }
642:
643: /*
644: * Process queued (text) ListenAddress entries.
645: */
646: static void
647: process_queued_listen_addrs(ServerOptions *options)
648: {
649: u_int i;
650:
651: if (options->num_ports == 0)
652: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
653: if (options->address_family == -1)
654: options->address_family = AF_UNSPEC;
655:
656: for (i = 0; i < options->num_queued_listens; i++) {
657: add_listen_addr(options, options->queued_listen_addrs[i],
658: options->queued_listen_ports[i]);
659: free(options->queued_listen_addrs[i]);
660: options->queued_listen_addrs[i] = NULL;
661: }
662: free(options->queued_listen_addrs);
663: options->queued_listen_addrs = NULL;
664: free(options->queued_listen_ports);
665: options->queued_listen_ports = NULL;
666: options->num_queued_listens = 0;
667: }
668:
1.226 dtucker 669: struct connection_info *
670: get_connection_info(int populate, int use_dns)
671: {
1.286 djm 672: struct ssh *ssh = active_state; /* XXX */
1.226 dtucker 673: static struct connection_info ci;
674:
675: if (!populate)
676: return &ci;
1.286 djm 677: ci.host = auth_get_canonical_hostname(ssh, use_dns);
678: ci.address = ssh_remote_ipaddr(ssh);
679: ci.laddress = ssh_local_ipaddr(ssh);
680: ci.lport = ssh_local_port(ssh);
1.226 dtucker 681: return &ci;
682: }
683:
1.153 dtucker 684: /*
685: * The strategy for the Match blocks is that the config file is parsed twice.
686: *
687: * The first time is at startup. activep is initialized to 1 and the
688: * directives in the global context are processed and acted on. Hitting a
689: * Match directive unsets activep and the directives inside the block are
690: * checked for syntax only.
691: *
692: * The second time is after a connection has been established but before
693: * authentication. activep is initialized to 2 and global config directives
694: * are ignored since they have already been processed. If the criteria in a
695: * Match block is met, activep is set and the subsequent directives
696: * processed and actioned until EOF or another Match block unsets it. Any
697: * options set are copied into the main server config.
698: *
699: * Potential additions/improvements:
700: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
701: *
702: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
703: * Match Address 192.168.0.*
704: * Tag trusted
705: * Match Group wheel
706: * Tag trusted
707: * Match Tag trusted
708: * AllowTcpForwarding yes
709: * GatewayPorts clientspecified
710: * [...]
711: *
712: * - Add a PermittedChannelRequests directive
713: * Match Group shell
714: * PermittedChannelRequests session,forwarded-tcpip
715: */
716:
717: static int
1.165 dtucker 718: match_cfg_line_group(const char *grps, int line, const char *user)
719: {
720: int result = 0;
721: struct passwd *pw;
722:
723: if (user == NULL)
724: goto out;
725:
726: if ((pw = getpwnam(user)) == NULL) {
727: debug("Can't match group at line %d because user %.100s does "
728: "not exist", line, user);
729: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
730: debug("Can't Match group because user %.100s not in any group "
731: "at line %d", user, line);
1.186 djm 732: } else if (ga_match_pattern_list(grps) != 1) {
733: debug("user %.100s does not match group list %.100s at line %d",
734: user, grps, line);
1.165 dtucker 735: } else {
1.186 djm 736: debug("user %.100s matched group list %.100s at line %d", user,
737: grps, line);
1.165 dtucker 738: result = 1;
739: }
740: out:
741: ga_free();
742: return result;
743: }
744:
1.226 dtucker 745: /*
1.230 dtucker 746: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 747: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 748: * not match.
1.226 dtucker 749: */
1.165 dtucker 750: static int
1.226 dtucker 751: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 752: {
1.243 dtucker 753: int result = 1, attributes = 0, port;
1.153 dtucker 754: char *arg, *attrib, *cp = *condition;
755:
1.226 dtucker 756: if (ci == NULL)
1.153 dtucker 757: debug3("checking syntax for 'Match %s'", cp);
758: else
1.226 dtucker 759: debug3("checking match for '%s' user %s host %s addr %s "
760: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
761: ci->host ? ci->host : "(null)",
762: ci->address ? ci->address : "(null)",
763: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 764:
765: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 766: attributes++;
767: if (strcasecmp(attrib, "all") == 0) {
768: if (attributes != 1 ||
769: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
770: error("'all' cannot be combined with other "
771: "Match attributes");
772: return -1;
773: }
774: *condition = cp;
775: return 1;
776: }
1.153 dtucker 777: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
778: error("Missing Match criteria for %s", attrib);
779: return -1;
780: }
781: if (strcasecmp(attrib, "user") == 0) {
1.226 dtucker 782: if (ci == NULL || ci->user == NULL) {
1.153 dtucker 783: result = 0;
784: continue;
785: }
1.269 djm 786: if (match_pattern_list(ci->user, arg, 0) != 1)
1.153 dtucker 787: result = 0;
788: else
789: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 790: "line %d", ci->user, arg, line);
1.165 dtucker 791: } else if (strcasecmp(attrib, "group") == 0) {
1.226 dtucker 792: if (ci == NULL || ci->user == NULL) {
793: result = 0;
794: continue;
795: }
796: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 797: case -1:
798: return -1;
799: case 0:
800: result = 0;
801: }
1.153 dtucker 802: } else if (strcasecmp(attrib, "host") == 0) {
1.226 dtucker 803: if (ci == NULL || ci->host == NULL) {
1.153 dtucker 804: result = 0;
805: continue;
806: }
1.269 djm 807: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 808: result = 0;
809: else
810: debug("connection from %.100s matched 'Host "
1.226 dtucker 811: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 812: } else if (strcasecmp(attrib, "address") == 0) {
1.226 dtucker 813: if (ci == NULL || ci->address == NULL) {
814: result = 0;
815: continue;
816: }
817: switch (addr_match_list(ci->address, arg)) {
1.181 djm 818: case 1:
819: debug("connection from %.100s matched 'Address "
1.226 dtucker 820: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 821: break;
822: case 0:
1.183 djm 823: case -1:
1.153 dtucker 824: result = 0;
1.181 djm 825: break;
1.183 djm 826: case -2:
1.181 djm 827: return -1;
1.153 dtucker 828: }
1.226 dtucker 829: } else if (strcasecmp(attrib, "localaddress") == 0){
830: if (ci == NULL || ci->laddress == NULL) {
831: result = 0;
832: continue;
833: }
834: switch (addr_match_list(ci->laddress, arg)) {
835: case 1:
836: debug("connection from %.100s matched "
837: "'LocalAddress %.100s' at line %d",
838: ci->laddress, arg, line);
839: break;
840: case 0:
841: case -1:
842: result = 0;
843: break;
844: case -2:
845: return -1;
846: }
847: } else if (strcasecmp(attrib, "localport") == 0) {
848: if ((port = a2port(arg)) == -1) {
849: error("Invalid LocalPort '%s' on Match line",
850: arg);
851: return -1;
852: }
853: if (ci == NULL || ci->lport == 0) {
854: result = 0;
855: continue;
856: }
857: /* TODO support port lists */
858: if (port == ci->lport)
859: debug("connection from %.100s matched "
860: "'LocalPort %d' at line %d",
861: ci->laddress, port, line);
862: else
863: result = 0;
1.153 dtucker 864: } else {
865: error("Unsupported Match attribute %s", attrib);
866: return -1;
867: }
1.243 dtucker 868: }
869: if (attributes == 0) {
870: error("One or more attributes required for Match");
871: return -1;
1.153 dtucker 872: }
1.226 dtucker 873: if (ci != NULL)
1.153 dtucker 874: debug3("match %sfound", result ? "" : "not ");
875: *condition = cp;
876: return result;
877: }
878:
1.158 dtucker 879: #define WHITESPACE " \t\r\n"
880:
1.220 djm 881: /* Multistate option parsing */
882: struct multistate {
883: char *key;
884: int value;
885: };
886: static const struct multistate multistate_addressfamily[] = {
887: { "inet", AF_INET },
888: { "inet6", AF_INET6 },
889: { "any", AF_UNSPEC },
890: { NULL, -1 }
891: };
892: static const struct multistate multistate_permitrootlogin[] = {
893: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 894: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 895: { "forced-commands-only", PERMIT_FORCED_ONLY },
896: { "yes", PERMIT_YES },
897: { "no", PERMIT_NO },
898: { NULL, -1 }
899: };
900: static const struct multistate multistate_compression[] = {
901: { "delayed", COMP_DELAYED },
902: { "yes", COMP_ZLIB },
903: { "no", COMP_NONE },
904: { NULL, -1 }
905: };
906: static const struct multistate multistate_gatewayports[] = {
907: { "clientspecified", 2 },
908: { "yes", 1 },
909: { "no", 0 },
910: { NULL, -1 }
911: };
1.222 djm 912: static const struct multistate multistate_privsep[] = {
1.228 djm 913: { "yes", PRIVSEP_NOSANDBOX },
914: { "sandbox", PRIVSEP_ON },
915: { "nosandbox", PRIVSEP_NOSANDBOX },
1.222 djm 916: { "no", PRIVSEP_OFF },
917: { NULL, -1 }
918: };
1.233 djm 919: static const struct multistate multistate_tcpfwd[] = {
920: { "yes", FORWARD_ALLOW },
921: { "all", FORWARD_ALLOW },
922: { "no", FORWARD_DENY },
923: { "remote", FORWARD_REMOTE },
924: { "local", FORWARD_LOCAL },
925: { NULL, -1 }
926: };
1.220 djm 927:
1.94 markus 928: int
929: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 930: const char *filename, int linenum, int *activep,
931: struct connection_info *connectinfo)
1.1 deraadt 932: {
1.238 dtucker 933: char *cp, **charptr, *arg, *p;
1.237 dtucker 934: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 935: SyslogFacility *log_facility_ptr;
936: LogLevel *log_level_ptr;
1.25 markus 937: ServerOpCodes opcode;
1.153 dtucker 938: u_int i, flags = 0;
1.151 djm 939: size_t len;
1.237 dtucker 940: long long val64;
1.220 djm 941: const struct multistate *multistate_ptr;
1.25 markus 942:
1.94 markus 943: cp = line;
1.148 dtucker 944: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 945: return 0;
1.94 markus 946: /* Ignore leading whitespace */
947: if (*arg == '\0')
948: arg = strdelim(&cp);
949: if (!arg || !*arg || *arg == '#')
950: return 0;
951: intptr = NULL;
952: charptr = NULL;
1.153 dtucker 953: opcode = parse_token(arg, filename, linenum, &flags);
954:
955: if (activep == NULL) { /* We are processing a command line directive */
956: cmdline = 1;
957: activep = &cmdline;
958: }
959: if (*activep && opcode != sMatch)
960: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
961: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 962: if (connectinfo == NULL) {
1.153 dtucker 963: fatal("%s line %d: Directive '%s' is not allowed "
964: "within a Match block", filename, linenum, arg);
965: } else { /* this is a directive we have already processed */
966: while (arg)
967: arg = strdelim(&cp);
968: return 0;
969: }
970: }
971:
1.94 markus 972: switch (opcode) {
973: case sBadOption:
974: return -1;
975: case sPort:
976: /* ignore ports from configfile if cmdline specifies ports */
977: if (options->ports_from_cmdline)
978: return 0;
979: if (options->num_ports >= MAX_PORTS)
980: fatal("%s line %d: too many ports.",
981: filename, linenum);
1.48 provos 982: arg = strdelim(&cp);
1.94 markus 983: if (!arg || *arg == '\0')
984: fatal("%s line %d: missing port number.",
985: filename, linenum);
986: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 987: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 988: fatal("%s line %d: Badly formatted port number.",
989: filename, linenum);
990: break;
1.29 markus 991:
1.94 markus 992: case sServerKeyBits:
993: intptr = &options->server_key_bits;
1.180 djm 994: parse_int:
1.94 markus 995: arg = strdelim(&cp);
996: if (!arg || *arg == '\0')
997: fatal("%s line %d: missing integer value.",
998: filename, linenum);
999: value = atoi(arg);
1.153 dtucker 1000: if (*activep && *intptr == -1)
1.94 markus 1001: *intptr = value;
1002: break;
1.25 markus 1003:
1.94 markus 1004: case sLoginGraceTime:
1005: intptr = &options->login_grace_time;
1.180 djm 1006: parse_time:
1.94 markus 1007: arg = strdelim(&cp);
1008: if (!arg || *arg == '\0')
1009: fatal("%s line %d: missing time value.",
1010: filename, linenum);
1011: if ((value = convtime(arg)) == -1)
1012: fatal("%s line %d: invalid time value.",
1013: filename, linenum);
1.268 djm 1014: if (*activep && *intptr == -1)
1.94 markus 1015: *intptr = value;
1016: break;
1017:
1018: case sKeyRegenerationTime:
1019: intptr = &options->key_regeneration_time;
1020: goto parse_time;
1021:
1022: case sListenAddress:
1023: arg = strdelim(&cp);
1.139 djm 1024: if (arg == NULL || *arg == '\0')
1025: fatal("%s line %d: missing address",
1.94 markus 1026: filename, linenum);
1.144 dtucker 1027: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1028: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1029: && strchr(p+1, ':') != NULL) {
1.266 dtucker 1030: queue_listen_addr(options, arg, 0);
1.144 dtucker 1031: break;
1032: }
1.139 djm 1033: p = hpdelim(&arg);
1034: if (p == NULL)
1035: fatal("%s line %d: bad address:port usage",
1036: filename, linenum);
1037: p = cleanhostname(p);
1038: if (arg == NULL)
1039: port = 0;
1.194 djm 1040: else if ((port = a2port(arg)) <= 0)
1.139 djm 1041: fatal("%s line %d: bad port number", filename, linenum);
1042:
1.266 dtucker 1043: queue_listen_addr(options, p, port);
1.25 markus 1044:
1.138 djm 1045: break;
1046:
1047: case sAddressFamily:
1.220 djm 1048: intptr = &options->address_family;
1049: multistate_ptr = multistate_addressfamily;
1050: parse_multistate:
1.138 djm 1051: arg = strdelim(&cp);
1.141 markus 1052: if (!arg || *arg == '\0')
1.220 djm 1053: fatal("%s line %d: missing argument.",
1.141 markus 1054: filename, linenum);
1.220 djm 1055: value = -1;
1056: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1057: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1058: value = multistate_ptr[i].value;
1059: break;
1060: }
1061: }
1062: if (value == -1)
1063: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1064: filename, linenum, arg);
1.220 djm 1065: if (*activep && *intptr == -1)
1.138 djm 1066: *intptr = value;
1.94 markus 1067: break;
1068:
1069: case sHostKeyFile:
1070: intptr = &options->num_host_key_files;
1071: if (*intptr >= MAX_HOSTKEYS)
1072: fatal("%s line %d: too many host keys specified (max %d).",
1073: filename, linenum, MAX_HOSTKEYS);
1074: charptr = &options->host_key_files[*intptr];
1.180 djm 1075: parse_filename:
1.94 markus 1076: arg = strdelim(&cp);
1077: if (!arg || *arg == '\0')
1078: fatal("%s line %d: missing file name.",
1079: filename, linenum);
1.153 dtucker 1080: if (*activep && *charptr == NULL) {
1.202 djm 1081: *charptr = derelativise_path(arg);
1.94 markus 1082: /* increase optional counter */
1083: if (intptr != NULL)
1084: *intptr = *intptr + 1;
1085: }
1086: break;
1.76 stevesk 1087:
1.240 markus 1088: case sHostKeyAgent:
1089: charptr = &options->host_key_agent;
1090: arg = strdelim(&cp);
1091: if (!arg || *arg == '\0')
1092: fatal("%s line %d: missing socket name.",
1093: filename, linenum);
1094: if (*activep && *charptr == NULL)
1095: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1096: xstrdup(arg) : derelativise_path(arg);
1097: break;
1098:
1.203 djm 1099: case sHostCertificate:
1100: intptr = &options->num_host_cert_files;
1101: if (*intptr >= MAX_HOSTKEYS)
1102: fatal("%s line %d: too many host certificates "
1103: "specified (max %d).", filename, linenum,
1104: MAX_HOSTCERTS);
1105: charptr = &options->host_cert_files[*intptr];
1106: goto parse_filename;
1107: break;
1108:
1.94 markus 1109: case sPidFile:
1110: charptr = &options->pid_file;
1111: goto parse_filename;
1.25 markus 1112:
1.94 markus 1113: case sPermitRootLogin:
1114: intptr = &options->permit_root_login;
1.220 djm 1115: multistate_ptr = multistate_permitrootlogin;
1116: goto parse_multistate;
1.36 markus 1117:
1.94 markus 1118: case sIgnoreRhosts:
1119: intptr = &options->ignore_rhosts;
1.180 djm 1120: parse_flag:
1.94 markus 1121: arg = strdelim(&cp);
1122: if (!arg || *arg == '\0')
1123: fatal("%s line %d: missing yes/no argument.",
1124: filename, linenum);
1125: value = 0; /* silence compiler */
1126: if (strcmp(arg, "yes") == 0)
1127: value = 1;
1128: else if (strcmp(arg, "no") == 0)
1129: value = 0;
1130: else
1131: fatal("%s line %d: Bad yes/no argument: %s",
1132: filename, linenum, arg);
1.153 dtucker 1133: if (*activep && *intptr == -1)
1.94 markus 1134: *intptr = value;
1135: break;
1136:
1137: case sIgnoreUserKnownHosts:
1138: intptr = &options->ignore_user_known_hosts;
1139: goto parse_flag;
1140:
1141: case sRhostsRSAAuthentication:
1142: intptr = &options->rhosts_rsa_authentication;
1143: goto parse_flag;
1144:
1145: case sHostbasedAuthentication:
1146: intptr = &options->hostbased_authentication;
1147: goto parse_flag;
1148:
1149: case sHostbasedUsesNameFromPacketOnly:
1150: intptr = &options->hostbased_uses_name_from_packet_only;
1151: goto parse_flag;
1152:
1.258 djm 1153: case sHostbasedAcceptedKeyTypes:
1154: charptr = &options->hostbased_key_types;
1155: parse_keytypes:
1156: arg = strdelim(&cp);
1157: if (!arg || *arg == '\0')
1158: fatal("%s line %d: Missing argument.",
1159: filename, linenum);
1.277 djm 1160: if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.258 djm 1161: fatal("%s line %d: Bad key types '%s'.",
1162: filename, linenum, arg ? arg : "<NONE>");
1163: if (*activep && *charptr == NULL)
1164: *charptr = xstrdup(arg);
1165: break;
1166:
1.276 markus 1167: case sHostKeyAlgorithms:
1168: charptr = &options->hostkeyalgorithms;
1169: goto parse_keytypes;
1170:
1.94 markus 1171: case sRSAAuthentication:
1172: intptr = &options->rsa_authentication;
1173: goto parse_flag;
1174:
1175: case sPubkeyAuthentication:
1176: intptr = &options->pubkey_authentication;
1177: goto parse_flag;
1.119 jakob 1178:
1.258 djm 1179: case sPubkeyAcceptedKeyTypes:
1180: charptr = &options->pubkey_key_types;
1181: goto parse_keytypes;
1182:
1.94 markus 1183: case sKerberosAuthentication:
1184: intptr = &options->kerberos_authentication;
1185: goto parse_flag;
1186:
1187: case sKerberosOrLocalPasswd:
1188: intptr = &options->kerberos_or_local_passwd;
1189: goto parse_flag;
1190:
1191: case sKerberosTicketCleanup:
1192: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1193: goto parse_flag;
1194:
1195: case sKerberosGetAFSToken:
1196: intptr = &options->kerberos_get_afs_token;
1.125 markus 1197: goto parse_flag;
1198:
1199: case sGssAuthentication:
1200: intptr = &options->gss_authentication;
1201: goto parse_flag;
1202:
1203: case sGssCleanupCreds:
1204: intptr = &options->gss_cleanup_creds;
1.271 djm 1205: goto parse_flag;
1206:
1207: case sGssStrictAcceptor:
1208: intptr = &options->gss_strict_acceptor;
1.94 markus 1209: goto parse_flag;
1210:
1211: case sPasswordAuthentication:
1212: intptr = &options->password_authentication;
1213: goto parse_flag;
1214:
1215: case sKbdInteractiveAuthentication:
1216: intptr = &options->kbd_interactive_authentication;
1217: goto parse_flag;
1218:
1219: case sChallengeResponseAuthentication:
1220: intptr = &options->challenge_response_authentication;
1221: goto parse_flag;
1222:
1223: case sPrintMotd:
1224: intptr = &options->print_motd;
1225: goto parse_flag;
1226:
1227: case sPrintLastLog:
1228: intptr = &options->print_lastlog;
1229: goto parse_flag;
1230:
1231: case sX11Forwarding:
1232: intptr = &options->x11_forwarding;
1233: goto parse_flag;
1234:
1235: case sX11DisplayOffset:
1236: intptr = &options->x11_display_offset;
1237: goto parse_int;
1.99 stevesk 1238:
1239: case sX11UseLocalhost:
1240: intptr = &options->x11_use_localhost;
1241: goto parse_flag;
1.94 markus 1242:
1243: case sXAuthLocation:
1244: charptr = &options->xauth_location;
1245: goto parse_filename;
1246:
1.244 djm 1247: case sPermitTTY:
1248: intptr = &options->permit_tty;
1249: goto parse_flag;
1250:
1.250 djm 1251: case sPermitUserRC:
1252: intptr = &options->permit_user_rc;
1253: goto parse_flag;
1254:
1.94 markus 1255: case sStrictModes:
1256: intptr = &options->strict_modes;
1257: goto parse_flag;
1258:
1.129 markus 1259: case sTCPKeepAlive:
1260: intptr = &options->tcp_keep_alive;
1.94 markus 1261: goto parse_flag;
1262:
1263: case sEmptyPasswd:
1264: intptr = &options->permit_empty_passwd;
1.113 markus 1265: goto parse_flag;
1266:
1267: case sPermitUserEnvironment:
1268: intptr = &options->permit_user_env;
1.94 markus 1269: goto parse_flag;
1270:
1271: case sUseLogin:
1272: intptr = &options->use_login;
1.111 markus 1273: goto parse_flag;
1274:
1275: case sCompression:
1276: intptr = &options->compression;
1.220 djm 1277: multistate_ptr = multistate_compression;
1278: goto parse_multistate;
1.94 markus 1279:
1.235 dtucker 1280: case sRekeyLimit:
1281: arg = strdelim(&cp);
1282: if (!arg || *arg == '\0')
1283: fatal("%.200s line %d: Missing argument.", filename,
1284: linenum);
1285: if (strcmp(arg, "default") == 0) {
1286: val64 = 0;
1287: } else {
1.236 dtucker 1288: if (scan_scaled(arg, &val64) == -1)
1289: fatal("%.200s line %d: Bad number '%s': %s",
1290: filename, linenum, arg, strerror(errno));
1.235 dtucker 1291: if (val64 != 0 && val64 < 16)
1292: fatal("%.200s line %d: RekeyLimit too small",
1293: filename, linenum);
1294: }
1295: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1296: options->rekey_limit = val64;
1.235 dtucker 1297: if (cp != NULL) { /* optional rekey interval present */
1298: if (strcmp(cp, "none") == 0) {
1299: (void)strdelim(&cp); /* discard */
1300: break;
1301: }
1302: intptr = &options->rekey_interval;
1303: goto parse_time;
1304: }
1305: break;
1306:
1.94 markus 1307: case sGatewayPorts:
1.251 millert 1308: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1309: multistate_ptr = multistate_gatewayports;
1310: goto parse_multistate;
1.25 markus 1311:
1.122 markus 1312: case sUseDNS:
1313: intptr = &options->use_dns;
1.94 markus 1314: goto parse_flag;
1.53 markus 1315:
1.94 markus 1316: case sLogFacility:
1.174 dtucker 1317: log_facility_ptr = &options->log_facility;
1.94 markus 1318: arg = strdelim(&cp);
1319: value = log_facility_number(arg);
1.101 markus 1320: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1321: fatal("%.200s line %d: unsupported log facility '%s'",
1322: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1323: if (*log_facility_ptr == -1)
1324: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1325: break;
1.25 markus 1326:
1.94 markus 1327: case sLogLevel:
1.174 dtucker 1328: log_level_ptr = &options->log_level;
1.94 markus 1329: arg = strdelim(&cp);
1330: value = log_level_number(arg);
1.101 markus 1331: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1332: fatal("%.200s line %d: unsupported log level '%s'",
1333: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1334: if (*log_level_ptr == -1)
1335: *log_level_ptr = (LogLevel) value;
1.94 markus 1336: break;
1337:
1338: case sAllowTcpForwarding:
1339: intptr = &options->allow_tcp_forwarding;
1.233 djm 1340: multistate_ptr = multistate_tcpfwd;
1341: goto parse_multistate;
1.102 provos 1342:
1.251 millert 1343: case sAllowStreamLocalForwarding:
1344: intptr = &options->allow_streamlocal_forwarding;
1345: multistate_ptr = multistate_tcpfwd;
1346: goto parse_multistate;
1347:
1.178 pyr 1348: case sAllowAgentForwarding:
1349: intptr = &options->allow_agent_forwarding;
1350: goto parse_flag;
1351:
1.102 provos 1352: case sUsePrivilegeSeparation:
1353: intptr = &use_privsep;
1.222 djm 1354: multistate_ptr = multistate_privsep;
1355: goto parse_multistate;
1.94 markus 1356:
1357: case sAllowUsers:
1358: while ((arg = strdelim(&cp)) && *arg != '\0') {
1359: if (options->num_allow_users >= MAX_ALLOW_USERS)
1360: fatal("%s line %d: too many allow users.",
1361: filename, linenum);
1.227 markus 1362: if (!*activep)
1363: continue;
1.112 deraadt 1364: options->allow_users[options->num_allow_users++] =
1365: xstrdup(arg);
1.94 markus 1366: }
1367: break;
1.25 markus 1368:
1.94 markus 1369: case sDenyUsers:
1370: while ((arg = strdelim(&cp)) && *arg != '\0') {
1371: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 stevesk 1372: fatal("%s line %d: too many deny users.",
1.94 markus 1373: filename, linenum);
1.227 markus 1374: if (!*activep)
1375: continue;
1.112 deraadt 1376: options->deny_users[options->num_deny_users++] =
1377: xstrdup(arg);
1.94 markus 1378: }
1379: break;
1.25 markus 1380:
1.94 markus 1381: case sAllowGroups:
1382: while ((arg = strdelim(&cp)) && *arg != '\0') {
1383: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1384: fatal("%s line %d: too many allow groups.",
1385: filename, linenum);
1.227 markus 1386: if (!*activep)
1387: continue;
1.112 deraadt 1388: options->allow_groups[options->num_allow_groups++] =
1389: xstrdup(arg);
1.94 markus 1390: }
1391: break;
1.33 markus 1392:
1.94 markus 1393: case sDenyGroups:
1394: while ((arg = strdelim(&cp)) && *arg != '\0') {
1395: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1396: fatal("%s line %d: too many deny groups.",
1397: filename, linenum);
1.227 markus 1398: if (!*activep)
1399: continue;
1400: options->deny_groups[options->num_deny_groups++] =
1401: xstrdup(arg);
1.94 markus 1402: }
1403: break;
1.66 markus 1404:
1.94 markus 1405: case sCiphers:
1406: arg = strdelim(&cp);
1407: if (!arg || *arg == '\0')
1408: fatal("%s line %d: Missing argument.", filename, linenum);
1.277 djm 1409: if (!ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1410: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1411: filename, linenum, arg ? arg : "<NONE>");
1412: if (options->ciphers == NULL)
1413: options->ciphers = xstrdup(arg);
1414: break;
1.33 markus 1415:
1.94 markus 1416: case sMacs:
1417: arg = strdelim(&cp);
1418: if (!arg || *arg == '\0')
1419: fatal("%s line %d: Missing argument.", filename, linenum);
1.277 djm 1420: if (!mac_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1421: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1422: filename, linenum, arg ? arg : "<NONE>");
1423: if (options->macs == NULL)
1424: options->macs = xstrdup(arg);
1.211 djm 1425: break;
1426:
1427: case sKexAlgorithms:
1428: arg = strdelim(&cp);
1429: if (!arg || *arg == '\0')
1430: fatal("%s line %d: Missing argument.",
1431: filename, linenum);
1.277 djm 1432: if (!kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.211 djm 1433: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1434: filename, linenum, arg ? arg : "<NONE>");
1435: if (options->kex_algorithms == NULL)
1436: options->kex_algorithms = xstrdup(arg);
1.94 markus 1437: break;
1.43 jakob 1438:
1.94 markus 1439: case sProtocol:
1440: intptr = &options->protocol;
1441: arg = strdelim(&cp);
1442: if (!arg || *arg == '\0')
1443: fatal("%s line %d: Missing argument.", filename, linenum);
1444: value = proto_spec(arg);
1445: if (value == SSH_PROTO_UNKNOWN)
1446: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 1447: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 1448: if (*intptr == SSH_PROTO_UNKNOWN)
1449: *intptr = value;
1450: break;
1451:
1452: case sSubsystem:
1453: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1454: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1455: filename, linenum);
1.94 markus 1456: }
1457: arg = strdelim(&cp);
1458: if (!arg || *arg == '\0')
1459: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1460: filename, linenum);
1.153 dtucker 1461: if (!*activep) {
1462: arg = strdelim(&cp);
1463: break;
1464: }
1.94 markus 1465: for (i = 0; i < options->num_subsystems; i++)
1466: if (strcmp(arg, options->subsystem_name[i]) == 0)
1467: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1468: filename, linenum, arg);
1.94 markus 1469: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1470: arg = strdelim(&cp);
1471: if (!arg || *arg == '\0')
1472: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1473: filename, linenum);
1.94 markus 1474: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1475:
1476: /* Collect arguments (separate to executable) */
1477: p = xstrdup(arg);
1478: len = strlen(p) + 1;
1479: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1480: len += 1 + strlen(arg);
1.264 deraadt 1481: p = xreallocarray(p, 1, len);
1.151 djm 1482: strlcat(p, " ", len);
1483: strlcat(p, arg, len);
1484: }
1485: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1486: options->num_subsystems++;
1487: break;
1.46 markus 1488:
1.94 markus 1489: case sMaxStartups:
1490: arg = strdelim(&cp);
1491: if (!arg || *arg == '\0')
1492: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1493: filename, linenum);
1.94 markus 1494: if ((n = sscanf(arg, "%d:%d:%d",
1495: &options->max_startups_begin,
1496: &options->max_startups_rate,
1497: &options->max_startups)) == 3) {
1498: if (options->max_startups_begin >
1499: options->max_startups ||
1500: options->max_startups_rate > 100 ||
1501: options->max_startups_rate < 1)
1.50 markus 1502: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1503: filename, linenum);
1.94 markus 1504: } else if (n != 1)
1505: fatal("%s line %d: Illegal MaxStartups spec.",
1506: filename, linenum);
1507: else
1508: options->max_startups = options->max_startups_begin;
1509: break;
1.133 dtucker 1510:
1511: case sMaxAuthTries:
1512: intptr = &options->max_authtries;
1513: goto parse_int;
1.94 markus 1514:
1.180 djm 1515: case sMaxSessions:
1516: intptr = &options->max_sessions;
1517: goto parse_int;
1518:
1.94 markus 1519: case sBanner:
1520: charptr = &options->banner;
1521: goto parse_filename;
1.176 djm 1522:
1.94 markus 1523: /*
1524: * These options can contain %X options expanded at
1525: * connect time, so that you can specify paths like:
1526: *
1527: * AuthorizedKeysFile /etc/ssh_keys/%u
1528: */
1529: case sAuthorizedKeysFile:
1.219 djm 1530: if (*activep && options->num_authkeys_files == 0) {
1531: while ((arg = strdelim(&cp)) && *arg != '\0') {
1532: if (options->num_authkeys_files >=
1533: MAX_AUTHKEYS_FILES)
1534: fatal("%s line %d: "
1535: "too many authorized keys files.",
1536: filename, linenum);
1537: options->authorized_keys_files[
1538: options->num_authkeys_files++] =
1539: tilde_expand_filename(arg, getuid());
1540: }
1541: }
1542: return 0;
1543:
1.208 djm 1544: case sAuthorizedPrincipalsFile:
1545: charptr = &options->authorized_principals_file;
1.205 djm 1546: arg = strdelim(&cp);
1547: if (!arg || *arg == '\0')
1548: fatal("%s line %d: missing file name.",
1549: filename, linenum);
1550: if (*activep && *charptr == NULL) {
1.206 markus 1551: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1552: /* increase optional counter */
1553: if (intptr != NULL)
1554: *intptr = *intptr + 1;
1555: }
1556: break;
1.94 markus 1557:
1558: case sClientAliveInterval:
1559: intptr = &options->client_alive_interval;
1560: goto parse_time;
1561:
1562: case sClientAliveCountMax:
1563: intptr = &options->client_alive_count_max;
1564: goto parse_int;
1.131 djm 1565:
1566: case sAcceptEnv:
1567: while ((arg = strdelim(&cp)) && *arg != '\0') {
1568: if (strchr(arg, '=') != NULL)
1569: fatal("%s line %d: Invalid environment name.",
1570: filename, linenum);
1571: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1572: fatal("%s line %d: too many allow env.",
1573: filename, linenum);
1.153 dtucker 1574: if (!*activep)
1.227 markus 1575: continue;
1.131 djm 1576: options->accept_env[options->num_accept_env++] =
1577: xstrdup(arg);
1578: }
1579: break;
1.145 reyk 1580:
1581: case sPermitTunnel:
1582: intptr = &options->permit_tun;
1.146 reyk 1583: arg = strdelim(&cp);
1584: if (!arg || *arg == '\0')
1585: fatal("%s line %d: Missing yes/point-to-point/"
1586: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1587: value = -1;
1588: for (i = 0; tunmode_desc[i].val != -1; i++)
1589: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1590: value = tunmode_desc[i].val;
1591: break;
1592: }
1593: if (value == -1)
1.146 reyk 1594: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1595: "no argument: %s", filename, linenum, arg);
1.268 djm 1596: if (*activep && *intptr == -1)
1.146 reyk 1597: *intptr = value;
1598: break;
1.94 markus 1599:
1.153 dtucker 1600: case sMatch:
1601: if (cmdline)
1602: fatal("Match directive not supported as a command-line "
1603: "option");
1.226 dtucker 1604: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1605: if (value < 0)
1606: fatal("%s line %d: Bad Match condition", filename,
1607: linenum);
1608: *activep = value;
1.156 dtucker 1609: break;
1610:
1611: case sPermitOpen:
1612: arg = strdelim(&cp);
1613: if (!arg || *arg == '\0')
1614: fatal("%s line %d: missing PermitOpen specification",
1615: filename, linenum);
1.167 dtucker 1616: n = options->num_permitted_opens; /* modified later */
1.156 dtucker 1617: if (strcmp(arg, "any") == 0) {
1.167 dtucker 1618: if (*activep && n == -1) {
1.156 dtucker 1619: channel_clear_adm_permitted_opens();
1.159 dtucker 1620: options->num_permitted_opens = 0;
1.224 dtucker 1621: }
1622: break;
1623: }
1624: if (strcmp(arg, "none") == 0) {
1625: if (*activep && n == -1) {
1626: options->num_permitted_opens = 1;
1627: channel_disable_adm_local_opens();
1.159 dtucker 1628: }
1.156 dtucker 1629: break;
1630: }
1.166 dtucker 1631: if (*activep && n == -1)
1632: channel_clear_adm_permitted_opens();
1.159 dtucker 1633: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1634: p = hpdelim(&arg);
1635: if (p == NULL)
1636: fatal("%s line %d: missing host in PermitOpen",
1637: filename, linenum);
1638: p = cleanhostname(p);
1.223 dtucker 1639: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1640: fatal("%s line %d: bad port number in "
1641: "PermitOpen", filename, linenum);
1.166 dtucker 1642: if (*activep && n == -1)
1.159 dtucker 1643: options->num_permitted_opens =
1644: channel_add_adm_permitted_opens(p, port);
1645: }
1.153 dtucker 1646: break;
1647:
1.158 dtucker 1648: case sForceCommand:
1.262 dtucker 1649: if (cp == NULL || *cp == '\0')
1.158 dtucker 1650: fatal("%.200s line %d: Missing argument.", filename,
1651: linenum);
1652: len = strspn(cp, WHITESPACE);
1653: if (*activep && options->adm_forced_command == NULL)
1654: options->adm_forced_command = xstrdup(cp + len);
1655: return 0;
1656:
1.176 djm 1657: case sChrootDirectory:
1658: charptr = &options->chroot_directory;
1.177 djm 1659:
1660: arg = strdelim(&cp);
1661: if (!arg || *arg == '\0')
1662: fatal("%s line %d: missing file name.",
1663: filename, linenum);
1664: if (*activep && *charptr == NULL)
1665: *charptr = xstrdup(arg);
1666: break;
1.176 djm 1667:
1.204 djm 1668: case sTrustedUserCAKeys:
1669: charptr = &options->trusted_user_ca_keys;
1670: goto parse_filename;
1671:
1672: case sRevokedKeys:
1673: charptr = &options->revoked_keys_file;
1674: goto parse_filename;
1675:
1.213 djm 1676: case sIPQoS:
1677: arg = strdelim(&cp);
1678: if ((value = parse_ipqos(arg)) == -1)
1679: fatal("%s line %d: Bad IPQoS value: %s",
1680: filename, linenum, arg);
1681: arg = strdelim(&cp);
1682: if (arg == NULL)
1683: value2 = value;
1684: else if ((value2 = parse_ipqos(arg)) == -1)
1685: fatal("%s line %d: Bad IPQoS value: %s",
1686: filename, linenum, arg);
1687: if (*activep) {
1688: options->ip_qos_interactive = value;
1689: options->ip_qos_bulk = value2;
1690: }
1691: break;
1692:
1.225 djm 1693: case sVersionAddendum:
1.262 dtucker 1694: if (cp == NULL || *cp == '\0')
1.225 djm 1695: fatal("%.200s line %d: Missing argument.", filename,
1696: linenum);
1697: len = strspn(cp, WHITESPACE);
1698: if (*activep && options->version_addendum == NULL) {
1699: if (strcasecmp(cp + len, "none") == 0)
1700: options->version_addendum = xstrdup("");
1701: else if (strchr(cp + len, '\r') != NULL)
1702: fatal("%.200s line %d: Invalid argument",
1703: filename, linenum);
1704: else
1705: options->version_addendum = xstrdup(cp + len);
1706: }
1707: return 0;
1708:
1.231 djm 1709: case sAuthorizedKeysCommand:
1.255 jsg 1710: if (cp == NULL)
1711: fatal("%.200s line %d: Missing argument.", filename,
1712: linenum);
1.231 djm 1713: len = strspn(cp, WHITESPACE);
1714: if (*activep && options->authorized_keys_command == NULL) {
1715: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1716: fatal("%.200s line %d: AuthorizedKeysCommand "
1717: "must be an absolute path",
1718: filename, linenum);
1719: options->authorized_keys_command = xstrdup(cp + len);
1720: }
1721: return 0;
1722:
1723: case sAuthorizedKeysCommandUser:
1724: charptr = &options->authorized_keys_command_user;
1725:
1726: arg = strdelim(&cp);
1.255 jsg 1727: if (!arg || *arg == '\0')
1728: fatal("%s line %d: missing AuthorizedKeysCommandUser "
1729: "argument.", filename, linenum);
1.231 djm 1730: if (*activep && *charptr == NULL)
1731: *charptr = xstrdup(arg);
1732: break;
1733:
1.270 djm 1734: case sAuthorizedPrincipalsCommand:
1735: if (cp == NULL)
1736: fatal("%.200s line %d: Missing argument.", filename,
1737: linenum);
1738: len = strspn(cp, WHITESPACE);
1739: if (*activep &&
1740: options->authorized_principals_command == NULL) {
1741: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1742: fatal("%.200s line %d: "
1743: "AuthorizedPrincipalsCommand must be "
1744: "an absolute path", filename, linenum);
1745: options->authorized_principals_command =
1746: xstrdup(cp + len);
1747: }
1748: return 0;
1749:
1750: case sAuthorizedPrincipalsCommandUser:
1751: charptr = &options->authorized_principals_command_user;
1752:
1753: arg = strdelim(&cp);
1754: if (!arg || *arg == '\0')
1755: fatal("%s line %d: missing "
1756: "AuthorizedPrincipalsCommandUser argument.",
1757: filename, linenum);
1758: if (*activep && *charptr == NULL)
1759: *charptr = xstrdup(arg);
1760: break;
1761:
1.232 djm 1762: case sAuthenticationMethods:
1.268 djm 1763: if (options->num_auth_methods == 0) {
1.291 ! djm 1764: value = 0; /* seen "any" pseudo-method */
1.232 djm 1765: while ((arg = strdelim(&cp)) && *arg != '\0') {
1766: if (options->num_auth_methods >=
1767: MAX_AUTH_METHODS)
1768: fatal("%s line %d: "
1769: "too many authentication methods.",
1770: filename, linenum);
1.291 ! djm 1771: if (strcmp(arg, "any") == 0) {
! 1772: if (options->num_auth_methods > 0) {
! 1773: fatal("%s line %d: \"any\" "
! 1774: "must appear alone in "
! 1775: "AuthenticationMethods",
! 1776: filename, linenum);
! 1777: }
! 1778: value = 1;
! 1779: } else if (value) {
! 1780: fatal("%s line %d: \"any\" must appear "
! 1781: "alone in AuthenticationMethods",
! 1782: filename, linenum);
! 1783: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 1784: fatal("%s line %d: invalid "
1785: "authentication method list.",
1786: filename, linenum);
1.291 ! djm 1787: }
1.268 djm 1788: if (!*activep)
1789: continue;
1.232 djm 1790: options->auth_methods[
1791: options->num_auth_methods++] = xstrdup(arg);
1792: }
1.291 ! djm 1793: if (options->num_auth_methods == 0) {
! 1794: fatal("%s line %d: no AuthenticationMethods "
! 1795: "specified", filename, linenum);
! 1796: }
1.232 djm 1797: }
1798: return 0;
1799:
1.251 millert 1800: case sStreamLocalBindMask:
1801: arg = strdelim(&cp);
1802: if (!arg || *arg == '\0')
1.268 djm 1803: fatal("%s line %d: missing StreamLocalBindMask "
1804: "argument.", filename, linenum);
1.251 millert 1805: /* Parse mode in octal format */
1806: value = strtol(arg, &p, 8);
1807: if (arg == p || value < 0 || value > 0777)
1808: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 1809: if (*activep)
1810: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 1811: break;
1812:
1813: case sStreamLocalBindUnlink:
1814: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1815: goto parse_flag;
1816:
1.256 djm 1817: case sFingerprintHash:
1818: arg = strdelim(&cp);
1819: if (!arg || *arg == '\0')
1820: fatal("%.200s line %d: Missing argument.",
1821: filename, linenum);
1822: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1823: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1824: filename, linenum, arg);
1825: if (*activep)
1826: options->fingerprint_hash = value;
1827: break;
1828:
1.94 markus 1829: case sDeprecated:
1.117 itojun 1830: logit("%s line %d: Deprecated option %s",
1.121 jakob 1831: filename, linenum, arg);
1832: while (arg)
1833: arg = strdelim(&cp);
1834: break;
1835:
1836: case sUnsupported:
1837: logit("%s line %d: Unsupported option %s",
1.94 markus 1838: filename, linenum, arg);
1839: while (arg)
1840: arg = strdelim(&cp);
1841: break;
1842:
1843: default:
1844: fatal("%s line %d: Missing handler for opcode %s (%d)",
1845: filename, linenum, arg, opcode);
1846: }
1847: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1848: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1849: filename, linenum, arg);
1850: return 0;
1851: }
1852:
1853: /* Reads the server configuration file. */
1.25 markus 1854:
1.94 markus 1855: void
1.134 djm 1856: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1857: {
1.229 dtucker 1858: char line[4096], *cp;
1.94 markus 1859: FILE *f;
1.229 dtucker 1860: int lineno = 0;
1.81 stevesk 1861:
1.134 djm 1862: debug2("%s: filename %s", __func__, filename);
1863: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1864: perror(filename);
1865: exit(1);
1866: }
1.134 djm 1867: buffer_clear(conf);
1868: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 1869: lineno++;
1870: if (strlen(line) == sizeof(line) - 1)
1871: fatal("%s line %d too long", filename, lineno);
1.134 djm 1872: /*
1873: * Trim out comments and strip whitespace
1.135 deraadt 1874: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1875: * line numbers later for error messages
1876: */
1877: if ((cp = strchr(line, '#')) != NULL)
1878: memcpy(cp, "\n", 2);
1879: cp = line + strspn(line, " \t\r");
1880:
1881: buffer_append(conf, cp, strlen(cp));
1882: }
1883: buffer_append(conf, "\0", 1);
1884: fclose(f);
1885: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1886: }
1887:
1888: void
1.226 dtucker 1889: parse_server_match_config(ServerOptions *options,
1890: struct connection_info *connectinfo)
1.153 dtucker 1891: {
1892: ServerOptions mo;
1893:
1894: initialize_server_options(&mo);
1.226 dtucker 1895: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 1896: copy_set_server_options(options, &mo, 0);
1.153 dtucker 1897: }
1898:
1.226 dtucker 1899: int parse_server_match_testspec(struct connection_info *ci, char *spec)
1900: {
1901: char *p;
1902:
1903: while ((p = strsep(&spec, ",")) && *p != '\0') {
1904: if (strncmp(p, "addr=", 5) == 0) {
1905: ci->address = xstrdup(p + 5);
1906: } else if (strncmp(p, "host=", 5) == 0) {
1907: ci->host = xstrdup(p + 5);
1908: } else if (strncmp(p, "user=", 5) == 0) {
1909: ci->user = xstrdup(p + 5);
1910: } else if (strncmp(p, "laddr=", 6) == 0) {
1911: ci->laddress = xstrdup(p + 6);
1912: } else if (strncmp(p, "lport=", 6) == 0) {
1913: ci->lport = a2port(p + 6);
1914: if (ci->lport == -1) {
1915: fprintf(stderr, "Invalid port '%s' in test mode"
1916: " specification %s\n", p+6, p);
1917: return -1;
1918: }
1919: } else {
1920: fprintf(stderr, "Invalid test mode specification %s\n",
1921: p);
1922: return -1;
1923: }
1924: }
1925: return 0;
1926: }
1927:
1928: /*
1929: * returns 1 for a complete spec, 0 for partial spec and -1 for an
1930: * empty spec.
1931: */
1932: int server_match_spec_complete(struct connection_info *ci)
1933: {
1934: if (ci->user && ci->host && ci->address)
1935: return 1; /* complete */
1936: if (!ci->user && !ci->host && !ci->address)
1937: return -1; /* empty */
1938: return 0; /* partial */
1939: }
1940:
1.168 dtucker 1941: /*
1942: * Copy any supported values that are set.
1943: *
1.195 jj 1944: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 1945: * array values that are not used pre-authentication, because any that we
1946: * do use must be explictly sent in mm_getpwnamallow().
1947: */
1.153 dtucker 1948: void
1.168 dtucker 1949: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 1950: {
1.247 djm 1951: #define M_CP_INTOPT(n) do {\
1952: if (src->n != -1) \
1953: dst->n = src->n; \
1954: } while (0)
1955:
1.168 dtucker 1956: M_CP_INTOPT(password_authentication);
1957: M_CP_INTOPT(gss_authentication);
1958: M_CP_INTOPT(rsa_authentication);
1959: M_CP_INTOPT(pubkey_authentication);
1960: M_CP_INTOPT(kerberos_authentication);
1961: M_CP_INTOPT(hostbased_authentication);
1.209 djm 1962: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 1963: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 1964: M_CP_INTOPT(permit_root_login);
1.188 djm 1965: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 1966:
1967: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 1968: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 1969: M_CP_INTOPT(allow_agent_forwarding);
1.209 djm 1970: M_CP_INTOPT(permit_tun);
1.251 millert 1971: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 1972: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 1973: M_CP_INTOPT(x11_display_offset);
1974: M_CP_INTOPT(x11_forwarding);
1975: M_CP_INTOPT(x11_use_localhost);
1.244 djm 1976: M_CP_INTOPT(permit_tty);
1.250 djm 1977: M_CP_INTOPT(permit_user_rc);
1.180 djm 1978: M_CP_INTOPT(max_sessions);
1.184 dtucker 1979: M_CP_INTOPT(max_authtries);
1.213 djm 1980: M_CP_INTOPT(ip_qos_interactive);
1981: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 1982: M_CP_INTOPT(rekey_limit);
1983: M_CP_INTOPT(rekey_interval);
1.289 djm 1984:
1985: /*
1986: * The bind_mask is a mode_t that may be unsigned, so we can't use
1987: * M_CP_INTOPT - it does a signed comparison that causes compiler
1988: * warnings.
1989: */
1.290 dtucker 1990: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 1991: dst->fwd_opts.streamlocal_bind_mask =
1992: src->fwd_opts.streamlocal_bind_mask;
1993: }
1.247 djm 1994:
1995: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
1996: #define M_CP_STROPT(n) do {\
1997: if (src->n != NULL && dst->n != src->n) { \
1998: free(dst->n); \
1999: dst->n = src->n; \
2000: } \
2001: } while(0)
2002: #define M_CP_STRARRAYOPT(n, num_n) do {\
2003: if (src->num_n != 0) { \
2004: for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \
2005: dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \
2006: } \
2007: } while(0)
1.168 dtucker 2008:
1.218 djm 2009: /* See comment in servconf.h */
2010: COPY_MATCH_STRING_OPTS();
1.282 djm 2011:
2012: /* Arguments that accept '+...' need to be expanded */
2013: assemble_algorithms(dst);
1.216 djm 2014:
1.217 dtucker 2015: /*
2016: * The only things that should be below this point are string options
2017: * which are only used after authentication.
2018: */
1.168 dtucker 2019: if (preauth)
2020: return;
1.219 djm 2021:
1.283 djm 2022: /* These options may be "none" to clear a global setting */
1.168 dtucker 2023: M_CP_STROPT(adm_forced_command);
1.283 djm 2024: if (option_clear_or_none(dst->adm_forced_command)) {
2025: free(dst->adm_forced_command);
2026: dst->adm_forced_command = NULL;
2027: }
1.176 djm 2028: M_CP_STROPT(chroot_directory);
1.283 djm 2029: if (option_clear_or_none(dst->chroot_directory)) {
2030: free(dst->chroot_directory);
2031: dst->chroot_directory = NULL;
2032: }
1.153 dtucker 2033: }
1.168 dtucker 2034:
2035: #undef M_CP_INTOPT
2036: #undef M_CP_STROPT
1.219 djm 2037: #undef M_CP_STRARRAYOPT
1.153 dtucker 2038:
2039: void
2040: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 2041: struct connection_info *connectinfo)
1.134 djm 2042: {
1.153 dtucker 2043: int active, linenum, bad_options = 0;
1.136 dtucker 2044: char *cp, *obuf, *cbuf;
1.134 djm 2045:
2046: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
2047:
1.287 djm 2048: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2049: fatal("%s: sshbuf_dup_string failed", __func__);
1.226 dtucker 2050: active = connectinfo ? 0 : 1;
1.137 dtucker 2051: linenum = 1;
1.140 deraadt 2052: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 2053: if (process_server_config_line(options, cp, filename,
1.226 dtucker 2054: linenum++, &active, connectinfo) != 0)
1.94 markus 2055: bad_options++;
1.1 deraadt 2056: }
1.239 djm 2057: free(obuf);
1.78 stevesk 2058: if (bad_options > 0)
2059: fatal("%s: terminating, %d bad configuration options",
2060: filename, bad_options);
1.266 dtucker 2061: process_queued_listen_addrs(options);
1.182 dtucker 2062: }
2063:
2064: static const char *
1.221 djm 2065: fmt_multistate_int(int val, const struct multistate *m)
2066: {
2067: u_int i;
2068:
2069: for (i = 0; m[i].key != NULL; i++) {
2070: if (m[i].value == val)
2071: return m[i].key;
2072: }
2073: return "UNKNOWN";
2074: }
2075:
2076: static const char *
1.182 dtucker 2077: fmt_intarg(ServerOpCodes code, int val)
2078: {
1.221 djm 2079: if (val == -1)
2080: return "unset";
2081: switch (code) {
2082: case sAddressFamily:
2083: return fmt_multistate_int(val, multistate_addressfamily);
2084: case sPermitRootLogin:
2085: return fmt_multistate_int(val, multistate_permitrootlogin);
2086: case sGatewayPorts:
2087: return fmt_multistate_int(val, multistate_gatewayports);
2088: case sCompression:
2089: return fmt_multistate_int(val, multistate_compression);
1.222 djm 2090: case sUsePrivilegeSeparation:
2091: return fmt_multistate_int(val, multistate_privsep);
1.233 djm 2092: case sAllowTcpForwarding:
2093: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2094: case sAllowStreamLocalForwarding:
2095: return fmt_multistate_int(val, multistate_tcpfwd);
1.256 djm 2096: case sFingerprintHash:
2097: return ssh_digest_alg_name(val);
1.221 djm 2098: case sProtocol:
1.182 dtucker 2099: switch (val) {
2100: case SSH_PROTO_1:
2101: return "1";
2102: case SSH_PROTO_2:
2103: return "2";
2104: case (SSH_PROTO_1|SSH_PROTO_2):
2105: return "2,1";
2106: default:
2107: return "UNKNOWN";
2108: }
1.221 djm 2109: default:
2110: switch (val) {
2111: case 0:
2112: return "no";
2113: case 1:
2114: return "yes";
2115: default:
2116: return "UNKNOWN";
2117: }
1.182 dtucker 2118: }
2119: }
2120:
2121: static const char *
2122: lookup_opcode_name(ServerOpCodes code)
2123: {
2124: u_int i;
2125:
2126: for (i = 0; keywords[i].name != NULL; i++)
2127: if (keywords[i].opcode == code)
2128: return(keywords[i].name);
2129: return "UNKNOWN";
2130: }
2131:
2132: static void
2133: dump_cfg_int(ServerOpCodes code, int val)
2134: {
2135: printf("%s %d\n", lookup_opcode_name(code), val);
2136: }
2137:
2138: static void
1.263 dtucker 2139: dump_cfg_oct(ServerOpCodes code, int val)
2140: {
2141: printf("%s 0%o\n", lookup_opcode_name(code), val);
2142: }
2143:
2144: static void
1.182 dtucker 2145: dump_cfg_fmtint(ServerOpCodes code, int val)
2146: {
2147: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2148: }
2149:
2150: static void
2151: dump_cfg_string(ServerOpCodes code, const char *val)
2152: {
2153: if (val == NULL)
2154: return;
1.257 djm 2155: printf("%s %s\n", lookup_opcode_name(code),
2156: val == NULL ? "none" : val);
1.182 dtucker 2157: }
2158:
2159: static void
2160: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2161: {
2162: u_int i;
2163:
2164: for (i = 0; i < count; i++)
1.219 djm 2165: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2166: }
2167:
2168: static void
2169: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2170: {
2171: u_int i;
2172:
1.291 ! djm 2173: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2174: return;
1.219 djm 2175: printf("%s", lookup_opcode_name(code));
2176: for (i = 0; i < count; i++)
2177: printf(" %s", vals[i]);
1.291 ! djm 2178: if (code == sAuthenticationMethods && count == 0)
! 2179: printf(" any");
1.219 djm 2180: printf("\n");
1.182 dtucker 2181: }
2182:
2183: void
2184: dump_config(ServerOptions *o)
2185: {
2186: u_int i;
2187: int ret;
2188: struct addrinfo *ai;
2189: char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL;
1.263 dtucker 2190: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2191:
2192: /* these are usually at the top of the config */
2193: for (i = 0; i < o->num_ports; i++)
2194: printf("port %d\n", o->ports[i]);
2195: dump_cfg_fmtint(sProtocol, o->protocol);
2196: dump_cfg_fmtint(sAddressFamily, o->address_family);
2197:
1.263 dtucker 2198: /*
2199: * ListenAddress must be after Port. add_one_listen_addr pushes
2200: * addresses onto a stack, so to maintain ordering we need to
2201: * print these in reverse order.
2202: */
1.182 dtucker 2203: for (ai = o->listen_addrs; ai; ai = ai->ai_next) {
2204: if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
2205: sizeof(addr), port, sizeof(port),
2206: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
2207: error("getnameinfo failed: %.100s",
2208: (ret != EAI_SYSTEM) ? gai_strerror(ret) :
2209: strerror(errno));
2210: } else {
1.263 dtucker 2211: laddr2 = laddr1;
1.182 dtucker 2212: if (ai->ai_family == AF_INET6)
1.263 dtucker 2213: xasprintf(&laddr1, "listenaddress [%s]:%s\n%s",
2214: addr, port, laddr2);
1.182 dtucker 2215: else
1.263 dtucker 2216: xasprintf(&laddr1, "listenaddress %s:%s\n%s",
2217: addr, port, laddr2);
2218: free(laddr2);
1.182 dtucker 2219: }
2220: }
1.263 dtucker 2221: printf("%s", laddr1);
2222: free(laddr1);
1.182 dtucker 2223:
2224: /* integer arguments */
2225: dump_cfg_int(sServerKeyBits, o->server_key_bits);
2226: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2227: dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time);
2228: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2229: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2230: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2231: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2232: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2233: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2234:
2235: /* formatted integer arguments */
2236: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2237: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2238: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2239: dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication);
2240: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2241: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2242: o->hostbased_uses_name_from_packet_only);
2243: dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication);
2244: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2245: #ifdef KRB5
1.182 dtucker 2246: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2247: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2248: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2249: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2250: #endif
2251: #ifdef GSSAPI
1.182 dtucker 2252: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2253: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2254: #endif
1.182 dtucker 2255: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2256: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2257: o->kbd_interactive_authentication);
2258: dump_cfg_fmtint(sChallengeResponseAuthentication,
2259: o->challenge_response_authentication);
2260: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2261: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2262: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2263: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2264: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2265: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2266: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2267: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2268: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2269: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2270: dump_cfg_fmtint(sUseLogin, o->use_login);
2271: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2272: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2273: dump_cfg_fmtint(sUseDNS, o->use_dns);
2274: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2275: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.251 millert 2276: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2277: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.182 dtucker 2278: dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
1.256 djm 2279: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.182 dtucker 2280:
2281: /* string arguments */
2282: dump_cfg_string(sPidFile, o->pid_file);
2283: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.252 djm 2284: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
2285: dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
1.182 dtucker 2286: dump_cfg_string(sBanner, o->banner);
2287: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2288: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2289: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2290: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 2291: dump_cfg_string(sAuthorizedPrincipalsFile,
2292: o->authorized_principals_file);
1.261 dtucker 2293: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2294: ? "none" : o->version_addendum);
1.231 djm 2295: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2296: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2297: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2298: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2299: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.252 djm 2300: dump_cfg_string(sKexAlgorithms,
1.253 djm 2301: o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
1.258 djm 2302: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
2303: o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
1.276 markus 2304: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
2305: o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG);
1.258 djm 2306: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ?
2307: o->pubkey_key_types : KEX_DEFAULT_PK_ALG);
1.182 dtucker 2308:
2309: /* string arguments requiring a lookup */
2310: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2311: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2312:
2313: /* string array arguments */
1.219 djm 2314: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2315: o->authorized_keys_files);
1.182 dtucker 2316: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2317: o->host_key_files);
1.261 dtucker 2318: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2319: o->host_cert_files);
1.182 dtucker 2320: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2321: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2322: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2323: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2324: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2325: dump_cfg_strarray_oneline(sAuthenticationMethods,
2326: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2327:
2328: /* other arguments */
2329: for (i = 0; i < o->num_subsystems; i++)
2330: printf("subsystem %s %s\n", o->subsystem_name[i],
2331: o->subsystem_args[i]);
2332:
2333: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2334: o->max_startups_rate, o->max_startups);
2335:
2336: for (i = 0; tunmode_desc[i].val != -1; i++)
2337: if (tunmode_desc[i].val == o->permit_tun) {
2338: s = tunmode_desc[i].text;
2339: break;
2340: }
2341: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2342:
1.214 stevesk 2343: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2344: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2345:
1.284 dtucker 2346: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2347: o->rekey_interval);
1.182 dtucker 2348:
2349: channel_print_adm_permitted_opens();
1.1 deraadt 2350: }
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