Annotation of src/usr.bin/ssh/servconf.c, Revision 1.324
1.226 dtucker 1:
1.324 ! djm 2: /* $OpenBSD: servconf.c,v 1.323 2018/02/09 02:37:36 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>
1.315 djm 17: #include <sys/sysctl.h>
1.154 stevesk 18:
1.213 djm 19: #include <netinet/in.h>
20: #include <netinet/ip.h>
1.315 djm 21: #include <net/route.h>
1.213 djm 22:
1.235 dtucker 23: #include <ctype.h>
1.154 stevesk 24: #include <netdb.h>
1.165 dtucker 25: #include <pwd.h>
1.162 stevesk 26: #include <stdio.h>
1.161 stevesk 27: #include <stdlib.h>
1.160 stevesk 28: #include <string.h>
1.164 deraadt 29: #include <signal.h>
1.155 stevesk 30: #include <unistd.h>
1.259 deraadt 31: #include <limits.h>
1.164 deraadt 32: #include <stdarg.h>
1.182 dtucker 33: #include <errno.h>
1.236 dtucker 34: #include <util.h>
1.1 deraadt 35:
1.164 deraadt 36: #include "xmalloc.h"
1.1 deraadt 37: #include "ssh.h"
1.62 markus 38: #include "log.h"
1.164 deraadt 39: #include "buffer.h"
1.251 millert 40: #include "misc.h"
1.1 deraadt 41: #include "servconf.h"
1.33 markus 42: #include "compat.h"
1.60 markus 43: #include "pathnames.h"
1.62 markus 44: #include "cipher.h"
1.164 deraadt 45: #include "key.h"
1.66 markus 46: #include "kex.h"
47: #include "mac.h"
1.153 dtucker 48: #include "match.h"
1.156 dtucker 49: #include "channels.h"
1.165 dtucker 50: #include "groupaccess.h"
1.226 dtucker 51: #include "canohost.h"
52: #include "packet.h"
1.232 djm 53: #include "hostfile.h"
54: #include "auth.h"
1.252 djm 55: #include "myproposal.h"
1.256 djm 56: #include "digest.h"
1.1 deraadt 57:
1.315 djm 58: static void add_listen_addr(ServerOptions *, const char *,
59: const char *, int);
60: static void add_one_listen_addr(ServerOptions *, const char *,
61: const char *, int);
1.29 markus 62:
1.102 provos 63: /* Use of privilege separation or not */
64: extern int use_privsep;
1.153 dtucker 65: extern Buffer cfg;
1.62 markus 66:
1.1 deraadt 67: /* Initializes the server options to their default values. */
68:
1.34 markus 69: void
1.25 markus 70: initialize_server_options(ServerOptions *options)
1.1 deraadt 71: {
1.25 markus 72: memset(options, 0, sizeof(*options));
1.29 markus 73: options->num_ports = 0;
74: options->ports_from_cmdline = 0;
1.266 dtucker 75: options->queued_listen_addrs = NULL;
76: options->num_queued_listens = 0;
1.29 markus 77: options->listen_addrs = NULL;
1.315 djm 78: options->num_listen_addrs = 0;
1.138 djm 79: options->address_family = -1;
1.316 djm 80: options->routing_domain = NULL;
1.54 markus 81: options->num_host_key_files = 0;
1.203 djm 82: options->num_host_cert_files = 0;
1.240 markus 83: options->host_key_agent = NULL;
1.36 markus 84: options->pid_file = NULL;
1.25 markus 85: options->login_grace_time = -1;
1.279 chris 86: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 87: options->ignore_rhosts = -1;
88: options->ignore_user_known_hosts = -1;
89: options->print_motd = -1;
1.72 stevesk 90: options->print_lastlog = -1;
1.25 markus 91: options->x11_forwarding = -1;
92: options->x11_display_offset = -1;
1.99 stevesk 93: options->x11_use_localhost = -1;
1.244 djm 94: options->permit_tty = -1;
1.250 djm 95: options->permit_user_rc = -1;
1.42 markus 96: options->xauth_location = NULL;
1.25 markus 97: options->strict_modes = -1;
1.129 markus 98: options->tcp_keep_alive = -1;
1.101 markus 99: options->log_facility = SYSLOG_FACILITY_NOT_SET;
100: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.75 markus 101: options->hostbased_authentication = -1;
102: options->hostbased_uses_name_from_packet_only = -1;
1.258 djm 103: options->hostbased_key_types = NULL;
1.276 markus 104: options->hostkeyalgorithms = NULL;
1.54 markus 105: options->pubkey_authentication = -1;
1.258 djm 106: options->pubkey_key_types = NULL;
1.25 markus 107: options->kerberos_authentication = -1;
108: options->kerberos_or_local_passwd = -1;
109: options->kerberos_ticket_cleanup = -1;
1.130 jakob 110: options->kerberos_get_afs_token = -1;
1.125 markus 111: options->gss_authentication=-1;
112: options->gss_cleanup_creds = -1;
1.271 djm 113: options->gss_strict_acceptor = -1;
1.25 markus 114: options->password_authentication = -1;
1.52 markus 115: options->kbd_interactive_authentication = -1;
1.80 markus 116: options->challenge_response_authentication = -1;
1.25 markus 117: options->permit_empty_passwd = -1;
1.113 markus 118: options->permit_user_env = -1;
1.111 markus 119: options->compression = -1;
1.235 dtucker 120: options->rekey_limit = -1;
121: options->rekey_interval = -1;
1.53 markus 122: options->allow_tcp_forwarding = -1;
1.251 millert 123: options->allow_streamlocal_forwarding = -1;
1.178 pyr 124: options->allow_agent_forwarding = -1;
1.25 markus 125: options->num_allow_users = 0;
126: options->num_deny_users = 0;
127: options->num_allow_groups = 0;
128: options->num_deny_groups = 0;
1.33 markus 129: options->ciphers = NULL;
1.66 markus 130: options->macs = NULL;
1.211 djm 131: options->kex_algorithms = NULL;
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;
1.310 djm 148: options->permitted_opens = NULL;
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;
1.301 djm 162: options->disable_forwarding = -1;
1.309 djm 163: options->expose_userauth_info = -1;
1.1 deraadt 164: }
165:
1.257 djm 166: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
167: static int
168: option_clear_or_none(const char *o)
169: {
170: return o == NULL || strcasecmp(o, "none") == 0;
171: }
172:
1.282 djm 173: static void
174: assemble_algorithms(ServerOptions *o)
175: {
176: if (kex_assemble_names(KEX_SERVER_ENCRYPT, &o->ciphers) != 0 ||
177: kex_assemble_names(KEX_SERVER_MAC, &o->macs) != 0 ||
178: kex_assemble_names(KEX_SERVER_KEX, &o->kex_algorithms) != 0 ||
179: kex_assemble_names(KEX_DEFAULT_PK_ALG,
180: &o->hostkeyalgorithms) != 0 ||
181: kex_assemble_names(KEX_DEFAULT_PK_ALG,
182: &o->hostbased_key_types) != 0 ||
183: kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->pubkey_key_types) != 0)
184: fatal("kex_assemble_names failed");
185: }
186:
1.314 djm 187: static void
188: array_append(const char *file, const int line, const char *directive,
189: char ***array, u_int *lp, const char *s)
190: {
191:
192: if (*lp >= INT_MAX)
193: fatal("%s line %d: Too many %s entries", file, line, directive);
194:
195: *array = xrecallocarray(*array, *lp, *lp + 1, sizeof(**array));
196: (*array)[*lp] = xstrdup(s);
197: (*lp)++;
198: }
199:
200: void
201: servconf_add_hostkey(const char *file, const int line,
202: ServerOptions *options, const char *path)
203: {
204: char *apath = derelativise_path(path);
205:
206: array_append(file, line, "HostKey",
207: &options->host_key_files, &options->num_host_key_files, apath);
208: free(apath);
209: }
210:
211: void
212: servconf_add_hostcert(const char *file, const int line,
213: ServerOptions *options, const char *path)
214: {
215: char *apath = derelativise_path(path);
216:
217: array_append(file, line, "HostCertificate",
218: &options->host_cert_files, &options->num_host_cert_files, apath);
219: free(apath);
220: }
221:
1.34 markus 222: void
1.25 markus 223: fill_default_server_options(ServerOptions *options)
1.1 deraadt 224: {
1.314 djm 225: u_int i;
1.257 djm 226:
1.54 markus 227: if (options->num_host_key_files == 0) {
1.293 naddy 228: /* fill default hostkeys */
1.314 djm 229: servconf_add_hostkey("[default]", 0, options,
230: _PATH_HOST_RSA_KEY_FILE);
231: servconf_add_hostkey("[default]", 0, options,
232: _PATH_HOST_ECDSA_KEY_FILE);
233: servconf_add_hostkey("[default]", 0, options,
234: _PATH_HOST_ED25519_KEY_FILE);
1.54 markus 235: }
1.203 djm 236: /* No certificates by default */
1.29 markus 237: if (options->num_ports == 0)
238: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 239: if (options->address_family == -1)
240: options->address_family = AF_UNSPEC;
1.29 markus 241: if (options->listen_addrs == NULL)
1.315 djm 242: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 243: if (options->pid_file == NULL)
1.257 djm 244: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 245: if (options->login_grace_time == -1)
1.115 stevesk 246: options->login_grace_time = 120;
1.67 markus 247: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 248: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 249: if (options->ignore_rhosts == -1)
1.30 markus 250: options->ignore_rhosts = 1;
1.25 markus 251: if (options->ignore_user_known_hosts == -1)
252: options->ignore_user_known_hosts = 0;
253: if (options->print_motd == -1)
254: options->print_motd = 1;
1.72 stevesk 255: if (options->print_lastlog == -1)
256: options->print_lastlog = 1;
1.25 markus 257: if (options->x11_forwarding == -1)
1.30 markus 258: options->x11_forwarding = 0;
1.25 markus 259: if (options->x11_display_offset == -1)
1.30 markus 260: options->x11_display_offset = 10;
1.99 stevesk 261: if (options->x11_use_localhost == -1)
262: options->x11_use_localhost = 1;
1.42 markus 263: if (options->xauth_location == NULL)
1.257 djm 264: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 265: if (options->permit_tty == -1)
266: options->permit_tty = 1;
1.250 djm 267: if (options->permit_user_rc == -1)
268: options->permit_user_rc = 1;
1.25 markus 269: if (options->strict_modes == -1)
270: options->strict_modes = 1;
1.129 markus 271: if (options->tcp_keep_alive == -1)
272: options->tcp_keep_alive = 1;
1.101 markus 273: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 274: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 275: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 276: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 277: if (options->hostbased_authentication == -1)
278: options->hostbased_authentication = 0;
279: if (options->hostbased_uses_name_from_packet_only == -1)
280: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 281: if (options->pubkey_authentication == -1)
282: options->pubkey_authentication = 1;
1.25 markus 283: if (options->kerberos_authentication == -1)
1.107 markus 284: options->kerberos_authentication = 0;
1.25 markus 285: if (options->kerberos_or_local_passwd == -1)
286: options->kerberos_or_local_passwd = 1;
287: if (options->kerberos_ticket_cleanup == -1)
288: options->kerberos_ticket_cleanup = 1;
1.130 jakob 289: if (options->kerberos_get_afs_token == -1)
290: options->kerberos_get_afs_token = 0;
1.125 markus 291: if (options->gss_authentication == -1)
292: options->gss_authentication = 0;
293: if (options->gss_cleanup_creds == -1)
294: options->gss_cleanup_creds = 1;
1.271 djm 295: if (options->gss_strict_acceptor == -1)
1.302 djm 296: options->gss_strict_acceptor = 1;
1.25 markus 297: if (options->password_authentication == -1)
298: options->password_authentication = 1;
1.52 markus 299: if (options->kbd_interactive_authentication == -1)
300: options->kbd_interactive_authentication = 0;
1.80 markus 301: if (options->challenge_response_authentication == -1)
302: options->challenge_response_authentication = 1;
1.25 markus 303: if (options->permit_empty_passwd == -1)
1.30 markus 304: options->permit_empty_passwd = 0;
1.113 markus 305: if (options->permit_user_env == -1)
306: options->permit_user_env = 0;
1.111 markus 307: if (options->compression == -1)
1.143 markus 308: options->compression = COMP_DELAYED;
1.235 dtucker 309: if (options->rekey_limit == -1)
310: options->rekey_limit = 0;
311: if (options->rekey_interval == -1)
312: options->rekey_interval = 0;
1.53 markus 313: if (options->allow_tcp_forwarding == -1)
1.233 djm 314: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 315: if (options->allow_streamlocal_forwarding == -1)
316: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 317: if (options->allow_agent_forwarding == -1)
318: options->allow_agent_forwarding = 1;
1.251 millert 319: if (options->fwd_opts.gateway_ports == -1)
320: options->fwd_opts.gateway_ports = 0;
1.46 markus 321: if (options->max_startups == -1)
1.234 dtucker 322: options->max_startups = 100;
1.50 markus 323: if (options->max_startups_rate == -1)
1.234 dtucker 324: options->max_startups_rate = 30; /* 30% */
1.50 markus 325: if (options->max_startups_begin == -1)
1.234 dtucker 326: options->max_startups_begin = 10;
1.133 dtucker 327: if (options->max_authtries == -1)
328: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 329: if (options->max_sessions == -1)
330: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 331: if (options->use_dns == -1)
1.260 deraadt 332: options->use_dns = 0;
1.77 beck 333: if (options->client_alive_interval == -1)
1.95 deraadt 334: options->client_alive_interval = 0;
1.77 beck 335: if (options->client_alive_count_max == -1)
336: options->client_alive_count_max = 3;
1.219 djm 337: if (options->num_authkeys_files == 0) {
1.314 djm 338: array_append("[default]", 0, "AuthorizedKeysFiles",
339: &options->authorized_keys_files,
340: &options->num_authkeys_files,
341: _PATH_SSH_USER_PERMITTED_KEYS);
342: array_append("[default]", 0, "AuthorizedKeysFiles",
343: &options->authorized_keys_files,
344: &options->num_authkeys_files,
345: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 346: }
1.145 reyk 347: if (options->permit_tun == -1)
1.146 reyk 348: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 349: if (options->ip_qos_interactive == -1)
350: options->ip_qos_interactive = IPTOS_LOWDELAY;
351: if (options->ip_qos_bulk == -1)
352: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 353: if (options->version_addendum == NULL)
354: options->version_addendum = xstrdup("");
1.251 millert 355: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
356: options->fwd_opts.streamlocal_bind_mask = 0177;
357: if (options->fwd_opts.streamlocal_bind_unlink == -1)
358: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 359: if (options->fingerprint_hash == -1)
360: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 361: if (options->disable_forwarding == -1)
362: options->disable_forwarding = 0;
1.309 djm 363: if (options->expose_userauth_info == -1)
364: options->expose_userauth_info = 0;
1.277 djm 365:
1.282 djm 366: assemble_algorithms(options);
1.277 djm 367:
1.285 djm 368: /* Turn privilege separation and sandboxing on by default */
1.102 provos 369: if (use_privsep == -1)
1.285 djm 370: use_privsep = PRIVSEP_ON;
1.257 djm 371:
372: #define CLEAR_ON_NONE(v) \
373: do { \
374: if (option_clear_or_none(v)) { \
375: free(v); \
376: v = NULL; \
377: } \
378: } while(0)
379: CLEAR_ON_NONE(options->pid_file);
380: CLEAR_ON_NONE(options->xauth_location);
381: CLEAR_ON_NONE(options->banner);
382: CLEAR_ON_NONE(options->trusted_user_ca_keys);
383: CLEAR_ON_NONE(options->revoked_keys_file);
1.267 djm 384: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 385: CLEAR_ON_NONE(options->adm_forced_command);
386: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 387: CLEAR_ON_NONE(options->routing_domain);
1.257 djm 388: for (i = 0; i < options->num_host_key_files; i++)
389: CLEAR_ON_NONE(options->host_key_files[i]);
390: for (i = 0; i < options->num_host_cert_files; i++)
391: CLEAR_ON_NONE(options->host_cert_files[i]);
392: #undef CLEAR_ON_NONE
1.291 djm 393:
394: /* Similar handling for AuthenticationMethods=any */
395: if (options->num_auth_methods == 1 &&
396: strcmp(options->auth_methods[0], "any") == 0) {
397: free(options->auth_methods[0]);
398: options->auth_methods[0] = NULL;
399: options->num_auth_methods = 0;
400: }
401:
1.1 deraadt 402: }
403:
404: /* Keyword tokens. */
1.25 markus 405: typedef enum {
406: sBadOption, /* == unknown option */
1.293 naddy 407: sPort, sHostKeyFile, sLoginGraceTime,
408: sPermitRootLogin, sLogFacility, sLogLevel,
1.25 markus 409: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 410: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 411: sPasswordAuthentication, sKbdInteractiveAuthentication,
412: sListenAddress, sAddressFamily,
1.72 stevesk 413: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 414: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 415: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 416: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 417: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 418: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 419: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
420: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 421: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 422: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 423: sHostKeyAlgorithms,
1.258 djm 424: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 425: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
426: sAcceptEnv, sPermitTunnel,
1.176 djm 427: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 428: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.249 djm 429: sHostCertificate,
1.208 djm 430: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 431: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.225 djm 432: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 433: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 434: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 435: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 436: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.316 djm 437: sExposeAuthInfo, sRDomain,
1.295 djm 438: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 439: } ServerOpCodes;
440:
1.153 dtucker 441: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
442: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
443: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
444:
1.1 deraadt 445: /* Textual representation of the tokens. */
1.25 markus 446: static struct {
447: const char *name;
448: ServerOpCodes opcode;
1.153 dtucker 449: u_int flags;
1.25 markus 450: } keywords[] = {
1.153 dtucker 451: { "port", sPort, SSHCFG_GLOBAL },
452: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
453: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 454: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 455: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 456: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 457: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 458: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 459: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 460: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 461: { "loglevel", sLogLevel, SSHCFG_ALL },
1.153 dtucker 462: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 463: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 464: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 465: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 466: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 467: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 468: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 469: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 470: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.153 dtucker 471: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 472: #ifdef KRB5
1.168 dtucker 473: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 474: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
475: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
476: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 477: #else
1.168 dtucker 478: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 479: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
480: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
481: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 482: #endif
1.153 dtucker 483: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
484: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 485: #ifdef GSSAPI
1.168 dtucker 486: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 487: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 488: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 489: #else
1.168 dtucker 490: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 491: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 492: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 493: #endif
1.168 dtucker 494: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
495: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 496: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 497: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
498: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
499: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
500: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
501: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
502: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
503: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
504: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 505: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
506: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
507: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 508: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
509: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 510: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 511: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 512: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 513: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 514: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 515: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
516: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
517: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 518: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 519: { "allowusers", sAllowUsers, SSHCFG_ALL },
520: { "denyusers", sDenyUsers, SSHCFG_ALL },
521: { "allowgroups", sAllowGroups, SSHCFG_ALL },
522: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 523: { "ciphers", sCiphers, SSHCFG_GLOBAL },
524: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 525: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 526: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
527: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
528: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 529: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 530: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 531: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 532: { "usedns", sUseDNS, SSHCFG_GLOBAL },
533: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
534: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 535: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
536: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 537: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 538: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 539: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 540: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 541: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 542: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 543: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 544: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 545: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 546: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 547: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 548: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 549: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
550: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 551: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 552: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 553: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 554: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
555: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 556: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
557: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 558: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 559: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 560: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
561: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
562: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 563: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 564: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 565: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 566: { "rdomain", sRDomain, SSHCFG_ALL },
1.153 dtucker 567: { NULL, sBadOption, 0 }
1.1 deraadt 568: };
569:
1.182 dtucker 570: static struct {
571: int val;
572: char *text;
573: } tunmode_desc[] = {
574: { SSH_TUNMODE_NO, "no" },
575: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
576: { SSH_TUNMODE_ETHERNET, "ethernet" },
577: { SSH_TUNMODE_YES, "yes" },
578: { -1, NULL }
579: };
580:
1.27 markus 581: /*
1.73 stevesk 582: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 583: */
1.1 deraadt 584:
1.34 markus 585: static ServerOpCodes
1.25 markus 586: parse_token(const char *cp, const char *filename,
1.153 dtucker 587: int linenum, u_int *flags)
1.1 deraadt 588: {
1.55 markus 589: u_int i;
1.1 deraadt 590:
1.25 markus 591: for (i = 0; keywords[i].name; i++)
1.153 dtucker 592: if (strcasecmp(cp, keywords[i].name) == 0) {
593: *flags = keywords[i].flags;
1.25 markus 594: return keywords[i].opcode;
1.153 dtucker 595: }
1.25 markus 596:
1.78 stevesk 597: error("%s: line %d: Bad configuration option: %s",
598: filename, linenum, cp);
1.25 markus 599: return sBadOption;
1.1 deraadt 600: }
601:
1.202 djm 602: char *
603: derelativise_path(const char *path)
604: {
1.259 deraadt 605: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 606:
1.257 djm 607: if (strcasecmp(path, "none") == 0)
608: return xstrdup("none");
1.202 djm 609: expanded = tilde_expand_filename(path, getuid());
610: if (*expanded == '/')
611: return expanded;
1.207 djm 612: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 613: fatal("%s: getcwd: %s", __func__, strerror(errno));
614: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 615: free(expanded);
1.202 djm 616: return ret;
617: }
618:
1.84 itojun 619: static void
1.315 djm 620: add_listen_addr(ServerOptions *options, const char *addr,
621: const char *rdomain, int port)
1.74 stevesk 622: {
1.142 djm 623: u_int i;
1.74 stevesk 624:
1.315 djm 625: if (port > 0)
626: add_one_listen_addr(options, addr, rdomain, port);
627: else {
628: for (i = 0; i < options->num_ports; i++) {
629: add_one_listen_addr(options, addr, rdomain,
630: options->ports[i]);
631: }
632: }
1.74 stevesk 633: }
634:
1.84 itojun 635: static void
1.315 djm 636: add_one_listen_addr(ServerOptions *options, const char *addr,
637: const char *rdomain, int port)
1.29 markus 638: {
639: struct addrinfo hints, *ai, *aitop;
640: char strport[NI_MAXSERV];
641: int gaierr;
1.315 djm 642: u_int i;
643:
644: /* Find listen_addrs entry for this rdomain */
645: for (i = 0; i < options->num_listen_addrs; i++) {
646: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
647: break;
648: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
649: continue;
650: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
651: break;
652: }
653: if (i >= options->num_listen_addrs) {
654: /* No entry for this rdomain; allocate one */
655: if (i >= INT_MAX)
656: fatal("%s: too many listen addresses", __func__);
657: options->listen_addrs = xrecallocarray(options->listen_addrs,
658: options->num_listen_addrs, options->num_listen_addrs + 1,
659: sizeof(*options->listen_addrs));
660: i = options->num_listen_addrs++;
661: if (rdomain != NULL)
662: options->listen_addrs[i].rdomain = xstrdup(rdomain);
663: }
664: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 665:
1.74 stevesk 666: memset(&hints, 0, sizeof(hints));
1.138 djm 667: hints.ai_family = options->address_family;
1.74 stevesk 668: hints.ai_socktype = SOCK_STREAM;
669: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 670: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 671: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
672: fatal("bad addr or host: %s (%s)",
673: addr ? addr : "<NULL>",
1.173 dtucker 674: ssh_gai_strerror(gaierr));
1.74 stevesk 675: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
676: ;
1.315 djm 677: ai->ai_next = options->listen_addrs[i].addrs;
678: options->listen_addrs[i].addrs = aitop;
679: }
680:
681: /* Returns nonzero if the routing domain name is valid */
682: static int
683: valid_rdomain(const char *name)
684: {
685: const char *errstr;
686: long long num;
687: struct rt_tableinfo info;
688: int mib[6];
689: size_t miblen = sizeof(mib);
690:
691: if (name == NULL)
692: return 1;
693:
694: num = strtonum(name, 0, 255, &errstr);
695: if (errstr != NULL)
696: return 0;
697:
698: /* Check whether the table actually exists */
699: memset(mib, 0, sizeof(mib));
700: mib[0] = CTL_NET;
701: mib[1] = PF_ROUTE;
702: mib[4] = NET_RT_TABLE;
703: mib[5] = (int)num;
704: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
705: return 0;
706:
707: return 1;
1.29 markus 708: }
709:
1.266 dtucker 710: /*
711: * Queue a ListenAddress to be processed once we have all of the Ports
712: * and AddressFamily options.
713: */
714: static void
1.315 djm 715: queue_listen_addr(ServerOptions *options, const char *addr,
716: const char *rdomain, int port)
1.266 dtucker 717: {
1.315 djm 718: struct queued_listenaddr *qla;
719:
720: options->queued_listen_addrs = xrecallocarray(
721: options->queued_listen_addrs,
722: options->num_queued_listens, options->num_queued_listens + 1,
723: sizeof(*options->queued_listen_addrs));
724: qla = &options->queued_listen_addrs[options->num_queued_listens++];
725: qla->addr = xstrdup(addr);
726: qla->port = port;
727: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 728: }
729:
730: /*
731: * Process queued (text) ListenAddress entries.
732: */
733: static void
734: process_queued_listen_addrs(ServerOptions *options)
735: {
736: u_int i;
1.315 djm 737: struct queued_listenaddr *qla;
1.266 dtucker 738:
739: if (options->num_ports == 0)
740: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
741: if (options->address_family == -1)
742: options->address_family = AF_UNSPEC;
743:
744: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 745: qla = &options->queued_listen_addrs[i];
746: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
747: free(qla->addr);
748: free(qla->rdomain);
1.266 dtucker 749: }
750: free(options->queued_listen_addrs);
751: options->queued_listen_addrs = NULL;
752: options->num_queued_listens = 0;
753: }
754:
1.310 djm 755: /*
756: * Inform channels layer of permitopen options from configuration.
757: */
758: void
759: process_permitopen(struct ssh *ssh, ServerOptions *options)
760: {
761: u_int i;
762: int port;
763: char *host, *arg, *oarg;
764:
765: channel_clear_adm_permitted_opens(ssh);
766: if (options->num_permitted_opens == 0)
767: return; /* permit any */
768:
769: /* handle keywords: "any" / "none" */
770: if (options->num_permitted_opens == 1 &&
771: strcmp(options->permitted_opens[0], "any") == 0)
772: return;
773: if (options->num_permitted_opens == 1 &&
774: strcmp(options->permitted_opens[0], "none") == 0) {
775: channel_disable_adm_local_opens(ssh);
776: return;
777: }
778: /* Otherwise treat it as a list of permitted host:port */
779: for (i = 0; i < options->num_permitted_opens; i++) {
780: oarg = arg = xstrdup(options->permitted_opens[i]);
781: host = hpdelim(&arg);
782: if (host == NULL)
783: fatal("%s: missing host in PermitOpen", __func__);
784: host = cleanhostname(host);
785: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
786: fatal("%s: bad port number in PermitOpen", __func__);
787: /* Send it to channels layer */
788: channel_add_adm_permitted_opens(ssh, host, port);
789: free(oarg);
790: }
791: }
792:
1.226 dtucker 793: struct connection_info *
794: get_connection_info(int populate, int use_dns)
795: {
1.286 djm 796: struct ssh *ssh = active_state; /* XXX */
1.226 dtucker 797: static struct connection_info ci;
798:
799: if (!populate)
800: return &ci;
1.286 djm 801: ci.host = auth_get_canonical_hostname(ssh, use_dns);
802: ci.address = ssh_remote_ipaddr(ssh);
803: ci.laddress = ssh_local_ipaddr(ssh);
804: ci.lport = ssh_local_port(ssh);
1.317 djm 805: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 806: return &ci;
807: }
808:
1.153 dtucker 809: /*
810: * The strategy for the Match blocks is that the config file is parsed twice.
811: *
812: * The first time is at startup. activep is initialized to 1 and the
813: * directives in the global context are processed and acted on. Hitting a
814: * Match directive unsets activep and the directives inside the block are
815: * checked for syntax only.
816: *
817: * The second time is after a connection has been established but before
818: * authentication. activep is initialized to 2 and global config directives
819: * are ignored since they have already been processed. If the criteria in a
820: * Match block is met, activep is set and the subsequent directives
821: * processed and actioned until EOF or another Match block unsets it. Any
822: * options set are copied into the main server config.
823: *
824: * Potential additions/improvements:
1.295 djm 825: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 826: *
827: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
828: * Match Address 192.168.0.*
829: * Tag trusted
830: * Match Group wheel
831: * Tag trusted
832: * Match Tag trusted
833: * AllowTcpForwarding yes
834: * GatewayPorts clientspecified
835: * [...]
836: *
837: * - Add a PermittedChannelRequests directive
838: * Match Group shell
839: * PermittedChannelRequests session,forwarded-tcpip
840: */
841:
842: static int
1.165 dtucker 843: match_cfg_line_group(const char *grps, int line, const char *user)
844: {
845: int result = 0;
846: struct passwd *pw;
847:
848: if (user == NULL)
849: goto out;
850:
851: if ((pw = getpwnam(user)) == NULL) {
852: debug("Can't match group at line %d because user %.100s does "
853: "not exist", line, user);
854: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
855: debug("Can't Match group because user %.100s not in any group "
856: "at line %d", user, line);
1.186 djm 857: } else if (ga_match_pattern_list(grps) != 1) {
858: debug("user %.100s does not match group list %.100s at line %d",
859: user, grps, line);
1.165 dtucker 860: } else {
1.186 djm 861: debug("user %.100s matched group list %.100s at line %d", user,
862: grps, line);
1.165 dtucker 863: result = 1;
864: }
865: out:
866: ga_free();
867: return result;
868: }
869:
1.319 dtucker 870: static void
871: match_test_missing_fatal(const char *criteria, const char *attrib)
872: {
873: fatal("'Match %s' in configuration but '%s' not in connection "
874: "test specification.", criteria, attrib);
875: }
876:
1.226 dtucker 877: /*
1.230 dtucker 878: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 879: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 880: * not match.
1.226 dtucker 881: */
1.165 dtucker 882: static int
1.226 dtucker 883: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 884: {
1.243 dtucker 885: int result = 1, attributes = 0, port;
1.153 dtucker 886: char *arg, *attrib, *cp = *condition;
887:
1.226 dtucker 888: if (ci == NULL)
1.153 dtucker 889: debug3("checking syntax for 'Match %s'", cp);
890: else
1.226 dtucker 891: debug3("checking match for '%s' user %s host %s addr %s "
892: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
893: ci->host ? ci->host : "(null)",
894: ci->address ? ci->address : "(null)",
895: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 896:
897: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 898: attributes++;
899: if (strcasecmp(attrib, "all") == 0) {
900: if (attributes != 1 ||
901: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
902: error("'all' cannot be combined with other "
903: "Match attributes");
904: return -1;
905: }
906: *condition = cp;
907: return 1;
908: }
1.153 dtucker 909: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
910: error("Missing Match criteria for %s", attrib);
911: return -1;
912: }
913: if (strcasecmp(attrib, "user") == 0) {
1.319 dtucker 914: if (ci == NULL) {
1.153 dtucker 915: result = 0;
916: continue;
917: }
1.319 dtucker 918: if (ci->user == NULL)
919: match_test_missing_fatal("User", "user");
1.269 djm 920: if (match_pattern_list(ci->user, arg, 0) != 1)
1.153 dtucker 921: result = 0;
922: else
923: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 924: "line %d", ci->user, arg, line);
1.165 dtucker 925: } else if (strcasecmp(attrib, "group") == 0) {
1.319 dtucker 926: if (ci == NULL) {
1.226 dtucker 927: result = 0;
928: continue;
929: }
1.319 dtucker 930: if (ci->user == NULL)
931: match_test_missing_fatal("Group", "user");
1.226 dtucker 932: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 933: case -1:
934: return -1;
935: case 0:
936: result = 0;
937: }
1.153 dtucker 938: } else if (strcasecmp(attrib, "host") == 0) {
1.319 dtucker 939: if (ci == NULL) {
1.153 dtucker 940: result = 0;
941: continue;
942: }
1.319 dtucker 943: if (ci->host == NULL)
944: match_test_missing_fatal("Host", "host");
1.269 djm 945: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 946: result = 0;
947: else
948: debug("connection from %.100s matched 'Host "
1.226 dtucker 949: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 950: } else if (strcasecmp(attrib, "address") == 0) {
1.319 dtucker 951: if (ci == NULL) {
1.226 dtucker 952: result = 0;
953: continue;
954: }
1.319 dtucker 955: if (ci->address == NULL)
956: match_test_missing_fatal("Address", "addr");
1.226 dtucker 957: switch (addr_match_list(ci->address, arg)) {
1.181 djm 958: case 1:
959: debug("connection from %.100s matched 'Address "
1.226 dtucker 960: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 961: break;
962: case 0:
1.183 djm 963: case -1:
1.153 dtucker 964: result = 0;
1.181 djm 965: break;
1.183 djm 966: case -2:
1.181 djm 967: return -1;
1.153 dtucker 968: }
1.226 dtucker 969: } else if (strcasecmp(attrib, "localaddress") == 0){
1.319 dtucker 970: if (ci == NULL) {
1.226 dtucker 971: result = 0;
972: continue;
973: }
1.319 dtucker 974: if (ci->laddress == NULL)
975: match_test_missing_fatal("LocalAddress",
976: "laddr");
1.226 dtucker 977: switch (addr_match_list(ci->laddress, arg)) {
978: case 1:
979: debug("connection from %.100s matched "
980: "'LocalAddress %.100s' at line %d",
981: ci->laddress, arg, line);
982: break;
983: case 0:
984: case -1:
985: result = 0;
986: break;
987: case -2:
988: return -1;
989: }
990: } else if (strcasecmp(attrib, "localport") == 0) {
991: if ((port = a2port(arg)) == -1) {
992: error("Invalid LocalPort '%s' on Match line",
993: arg);
994: return -1;
995: }
1.319 dtucker 996: if (ci == NULL) {
1.226 dtucker 997: result = 0;
998: continue;
999: }
1.319 dtucker 1000: if (ci->lport == 0)
1001: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1002: /* TODO support port lists */
1003: if (port == ci->lport)
1004: debug("connection from %.100s matched "
1005: "'LocalPort %d' at line %d",
1006: ci->laddress, port, line);
1007: else
1008: result = 0;
1.317 djm 1009: } else if (strcasecmp(attrib, "rdomain") == 0) {
1010: if (ci == NULL || ci->rdomain == NULL) {
1011: result = 0;
1012: continue;
1013: }
1014: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1015: result = 0;
1016: else
1017: debug("user %.100s matched 'RDomain %.100s' at "
1018: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1019: } else {
1020: error("Unsupported Match attribute %s", attrib);
1021: return -1;
1022: }
1.243 dtucker 1023: }
1024: if (attributes == 0) {
1025: error("One or more attributes required for Match");
1026: return -1;
1.153 dtucker 1027: }
1.226 dtucker 1028: if (ci != NULL)
1.153 dtucker 1029: debug3("match %sfound", result ? "" : "not ");
1030: *condition = cp;
1031: return result;
1032: }
1033:
1.158 dtucker 1034: #define WHITESPACE " \t\r\n"
1035:
1.220 djm 1036: /* Multistate option parsing */
1037: struct multistate {
1038: char *key;
1039: int value;
1040: };
1.320 djm 1041: static const struct multistate multistate_flag[] = {
1042: { "yes", 1 },
1043: { "no", 0 },
1044: { NULL, -1 }
1045: };
1.220 djm 1046: static const struct multistate multistate_addressfamily[] = {
1047: { "inet", AF_INET },
1048: { "inet6", AF_INET6 },
1049: { "any", AF_UNSPEC },
1050: { NULL, -1 }
1051: };
1052: static const struct multistate multistate_permitrootlogin[] = {
1053: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1054: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1055: { "forced-commands-only", PERMIT_FORCED_ONLY },
1056: { "yes", PERMIT_YES },
1057: { "no", PERMIT_NO },
1058: { NULL, -1 }
1059: };
1060: static const struct multistate multistate_compression[] = {
1.297 djm 1061: { "yes", COMP_DELAYED },
1.220 djm 1062: { "delayed", COMP_DELAYED },
1063: { "no", COMP_NONE },
1064: { NULL, -1 }
1065: };
1066: static const struct multistate multistate_gatewayports[] = {
1067: { "clientspecified", 2 },
1068: { "yes", 1 },
1069: { "no", 0 },
1.222 djm 1070: { NULL, -1 }
1071: };
1.233 djm 1072: static const struct multistate multistate_tcpfwd[] = {
1073: { "yes", FORWARD_ALLOW },
1074: { "all", FORWARD_ALLOW },
1075: { "no", FORWARD_DENY },
1076: { "remote", FORWARD_REMOTE },
1077: { "local", FORWARD_LOCAL },
1078: { NULL, -1 }
1079: };
1.220 djm 1080:
1.94 markus 1081: int
1082: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 1083: const char *filename, int linenum, int *activep,
1084: struct connection_info *connectinfo)
1.1 deraadt 1085: {
1.310 djm 1086: char *cp, **charptr, *arg, *arg2, *p;
1.237 dtucker 1087: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 1088: SyslogFacility *log_facility_ptr;
1089: LogLevel *log_level_ptr;
1.25 markus 1090: ServerOpCodes opcode;
1.153 dtucker 1091: u_int i, flags = 0;
1.151 djm 1092: size_t len;
1.237 dtucker 1093: long long val64;
1.220 djm 1094: const struct multistate *multistate_ptr;
1.322 dtucker 1095: const char *errstr;
1.303 djm 1096:
1097: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1098: if ((len = strlen(line)) == 0)
1099: return 0;
1100: for (len--; len > 0; len--) {
1101: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1102: break;
1103: line[len] = '\0';
1104: }
1.25 markus 1105:
1.94 markus 1106: cp = line;
1.148 dtucker 1107: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1108: return 0;
1.94 markus 1109: /* Ignore leading whitespace */
1110: if (*arg == '\0')
1111: arg = strdelim(&cp);
1112: if (!arg || !*arg || *arg == '#')
1113: return 0;
1114: intptr = NULL;
1115: charptr = NULL;
1.153 dtucker 1116: opcode = parse_token(arg, filename, linenum, &flags);
1117:
1118: if (activep == NULL) { /* We are processing a command line directive */
1119: cmdline = 1;
1120: activep = &cmdline;
1121: }
1122: if (*activep && opcode != sMatch)
1123: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1124: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1125: if (connectinfo == NULL) {
1.153 dtucker 1126: fatal("%s line %d: Directive '%s' is not allowed "
1127: "within a Match block", filename, linenum, arg);
1128: } else { /* this is a directive we have already processed */
1129: while (arg)
1130: arg = strdelim(&cp);
1131: return 0;
1132: }
1133: }
1134:
1.94 markus 1135: switch (opcode) {
1136: case sBadOption:
1137: return -1;
1138: case sPort:
1139: /* ignore ports from configfile if cmdline specifies ports */
1140: if (options->ports_from_cmdline)
1141: return 0;
1142: if (options->num_ports >= MAX_PORTS)
1143: fatal("%s line %d: too many ports.",
1144: filename, linenum);
1.48 provos 1145: arg = strdelim(&cp);
1.94 markus 1146: if (!arg || *arg == '\0')
1147: fatal("%s line %d: missing port number.",
1148: filename, linenum);
1149: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1150: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1151: fatal("%s line %d: Badly formatted port number.",
1152: filename, linenum);
1153: break;
1.29 markus 1154:
1.94 markus 1155: case sLoginGraceTime:
1156: intptr = &options->login_grace_time;
1.180 djm 1157: parse_time:
1.94 markus 1158: arg = strdelim(&cp);
1159: if (!arg || *arg == '\0')
1160: fatal("%s line %d: missing time value.",
1161: filename, linenum);
1162: if ((value = convtime(arg)) == -1)
1163: fatal("%s line %d: invalid time value.",
1164: filename, linenum);
1.268 djm 1165: if (*activep && *intptr == -1)
1.94 markus 1166: *intptr = value;
1167: break;
1168:
1169: case sListenAddress:
1170: arg = strdelim(&cp);
1.139 djm 1171: if (arg == NULL || *arg == '\0')
1172: fatal("%s line %d: missing address",
1.94 markus 1173: filename, linenum);
1.144 dtucker 1174: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1175: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1176: && strchr(p+1, ':') != NULL) {
1.315 djm 1177: port = 0;
1178: p = arg;
1179: } else {
1180: p = hpdelim(&arg);
1181: if (p == NULL)
1182: fatal("%s line %d: bad address:port usage",
1183: filename, linenum);
1184: p = cleanhostname(p);
1185: if (arg == NULL)
1186: port = 0;
1187: else if ((port = a2port(arg)) <= 0)
1188: fatal("%s line %d: bad port number",
1189: filename, linenum);
1190: }
1191: /* Optional routing table */
1192: arg2 = NULL;
1193: if ((arg = strdelim(&cp)) != NULL) {
1194: if (strcmp(arg, "rdomain") != 0 ||
1195: (arg2 = strdelim(&cp)) == NULL)
1196: fatal("%s line %d: bad ListenAddress syntax",
1197: filename, linenum);
1198: if (!valid_rdomain(arg2))
1199: fatal("%s line %d: bad routing domain",
1200: filename, linenum);
1.144 dtucker 1201: }
1.139 djm 1202:
1.315 djm 1203: queue_listen_addr(options, p, arg2, port);
1.25 markus 1204:
1.138 djm 1205: break;
1206:
1207: case sAddressFamily:
1.220 djm 1208: intptr = &options->address_family;
1209: multistate_ptr = multistate_addressfamily;
1210: parse_multistate:
1.138 djm 1211: arg = strdelim(&cp);
1.141 markus 1212: if (!arg || *arg == '\0')
1.220 djm 1213: fatal("%s line %d: missing argument.",
1.141 markus 1214: filename, linenum);
1.220 djm 1215: value = -1;
1216: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1217: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1218: value = multistate_ptr[i].value;
1219: break;
1220: }
1221: }
1222: if (value == -1)
1223: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1224: filename, linenum, arg);
1.220 djm 1225: if (*activep && *intptr == -1)
1.138 djm 1226: *intptr = value;
1.94 markus 1227: break;
1228:
1229: case sHostKeyFile:
1230: arg = strdelim(&cp);
1231: if (!arg || *arg == '\0')
1232: fatal("%s line %d: missing file name.",
1233: filename, linenum);
1.314 djm 1234: if (*activep)
1235: servconf_add_hostkey(filename, linenum, options, arg);
1.94 markus 1236: break;
1.76 stevesk 1237:
1.240 markus 1238: case sHostKeyAgent:
1239: charptr = &options->host_key_agent;
1240: arg = strdelim(&cp);
1241: if (!arg || *arg == '\0')
1242: fatal("%s line %d: missing socket name.",
1243: filename, linenum);
1244: if (*activep && *charptr == NULL)
1245: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1246: xstrdup(arg) : derelativise_path(arg);
1247: break;
1248:
1.203 djm 1249: case sHostCertificate:
1.314 djm 1250: arg = strdelim(&cp);
1251: if (!arg || *arg == '\0')
1252: fatal("%s line %d: missing file name.",
1253: filename, linenum);
1254: if (*activep)
1255: servconf_add_hostcert(filename, linenum, options, arg);
1256: break;
1.203 djm 1257:
1.94 markus 1258: case sPidFile:
1259: charptr = &options->pid_file;
1.314 djm 1260: parse_filename:
1261: arg = strdelim(&cp);
1262: if (!arg || *arg == '\0')
1263: fatal("%s line %d: missing file name.",
1264: filename, linenum);
1265: if (*activep && *charptr == NULL) {
1266: *charptr = derelativise_path(arg);
1267: /* increase optional counter */
1268: if (intptr != NULL)
1269: *intptr = *intptr + 1;
1270: }
1271: break;
1.25 markus 1272:
1.94 markus 1273: case sPermitRootLogin:
1274: intptr = &options->permit_root_login;
1.220 djm 1275: multistate_ptr = multistate_permitrootlogin;
1276: goto parse_multistate;
1.36 markus 1277:
1.94 markus 1278: case sIgnoreRhosts:
1279: intptr = &options->ignore_rhosts;
1.180 djm 1280: parse_flag:
1.320 djm 1281: multistate_ptr = multistate_flag;
1282: goto parse_multistate;
1.94 markus 1283:
1284: case sIgnoreUserKnownHosts:
1285: intptr = &options->ignore_user_known_hosts;
1286: goto parse_flag;
1287:
1288: case sHostbasedAuthentication:
1289: intptr = &options->hostbased_authentication;
1290: goto parse_flag;
1291:
1292: case sHostbasedUsesNameFromPacketOnly:
1293: intptr = &options->hostbased_uses_name_from_packet_only;
1294: goto parse_flag;
1295:
1.258 djm 1296: case sHostbasedAcceptedKeyTypes:
1297: charptr = &options->hostbased_key_types;
1298: parse_keytypes:
1299: arg = strdelim(&cp);
1300: if (!arg || *arg == '\0')
1301: fatal("%s line %d: Missing argument.",
1302: filename, linenum);
1.304 djm 1303: if (*arg != '-' &&
1304: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.258 djm 1305: fatal("%s line %d: Bad key types '%s'.",
1306: filename, linenum, arg ? arg : "<NONE>");
1307: if (*activep && *charptr == NULL)
1308: *charptr = xstrdup(arg);
1309: break;
1310:
1.276 markus 1311: case sHostKeyAlgorithms:
1312: charptr = &options->hostkeyalgorithms;
1313: goto parse_keytypes;
1314:
1.94 markus 1315: case sPubkeyAuthentication:
1316: intptr = &options->pubkey_authentication;
1317: goto parse_flag;
1.119 jakob 1318:
1.258 djm 1319: case sPubkeyAcceptedKeyTypes:
1320: charptr = &options->pubkey_key_types;
1321: goto parse_keytypes;
1322:
1.94 markus 1323: case sKerberosAuthentication:
1324: intptr = &options->kerberos_authentication;
1325: goto parse_flag;
1326:
1327: case sKerberosOrLocalPasswd:
1328: intptr = &options->kerberos_or_local_passwd;
1329: goto parse_flag;
1330:
1331: case sKerberosTicketCleanup:
1332: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1333: goto parse_flag;
1334:
1335: case sKerberosGetAFSToken:
1336: intptr = &options->kerberos_get_afs_token;
1.125 markus 1337: goto parse_flag;
1338:
1339: case sGssAuthentication:
1340: intptr = &options->gss_authentication;
1341: goto parse_flag;
1342:
1343: case sGssCleanupCreds:
1344: intptr = &options->gss_cleanup_creds;
1.271 djm 1345: goto parse_flag;
1346:
1347: case sGssStrictAcceptor:
1348: intptr = &options->gss_strict_acceptor;
1.94 markus 1349: goto parse_flag;
1350:
1351: case sPasswordAuthentication:
1352: intptr = &options->password_authentication;
1353: goto parse_flag;
1354:
1355: case sKbdInteractiveAuthentication:
1356: intptr = &options->kbd_interactive_authentication;
1357: goto parse_flag;
1358:
1359: case sChallengeResponseAuthentication:
1360: intptr = &options->challenge_response_authentication;
1361: goto parse_flag;
1362:
1363: case sPrintMotd:
1364: intptr = &options->print_motd;
1365: goto parse_flag;
1366:
1367: case sPrintLastLog:
1368: intptr = &options->print_lastlog;
1369: goto parse_flag;
1370:
1371: case sX11Forwarding:
1372: intptr = &options->x11_forwarding;
1373: goto parse_flag;
1374:
1375: case sX11DisplayOffset:
1376: intptr = &options->x11_display_offset;
1.293 naddy 1377: parse_int:
1378: arg = strdelim(&cp);
1.322 dtucker 1379: if ((errstr = atoi_err(arg, &value)) != NULL)
1380: fatal("%s line %d: integer value %s.",
1381: filename, linenum, errstr);
1.293 naddy 1382: if (*activep && *intptr == -1)
1383: *intptr = value;
1384: break;
1.99 stevesk 1385:
1386: case sX11UseLocalhost:
1387: intptr = &options->x11_use_localhost;
1388: goto parse_flag;
1.94 markus 1389:
1390: case sXAuthLocation:
1391: charptr = &options->xauth_location;
1392: goto parse_filename;
1393:
1.244 djm 1394: case sPermitTTY:
1395: intptr = &options->permit_tty;
1396: goto parse_flag;
1397:
1.250 djm 1398: case sPermitUserRC:
1399: intptr = &options->permit_user_rc;
1400: goto parse_flag;
1401:
1.94 markus 1402: case sStrictModes:
1403: intptr = &options->strict_modes;
1404: goto parse_flag;
1405:
1.129 markus 1406: case sTCPKeepAlive:
1407: intptr = &options->tcp_keep_alive;
1.94 markus 1408: goto parse_flag;
1409:
1410: case sEmptyPasswd:
1411: intptr = &options->permit_empty_passwd;
1.113 markus 1412: goto parse_flag;
1413:
1414: case sPermitUserEnvironment:
1415: intptr = &options->permit_user_env;
1.94 markus 1416: goto parse_flag;
1417:
1.111 markus 1418: case sCompression:
1419: intptr = &options->compression;
1.220 djm 1420: multistate_ptr = multistate_compression;
1421: goto parse_multistate;
1.94 markus 1422:
1.235 dtucker 1423: case sRekeyLimit:
1424: arg = strdelim(&cp);
1425: if (!arg || *arg == '\0')
1426: fatal("%.200s line %d: Missing argument.", filename,
1427: linenum);
1428: if (strcmp(arg, "default") == 0) {
1429: val64 = 0;
1430: } else {
1.236 dtucker 1431: if (scan_scaled(arg, &val64) == -1)
1432: fatal("%.200s line %d: Bad number '%s': %s",
1433: filename, linenum, arg, strerror(errno));
1.235 dtucker 1434: if (val64 != 0 && val64 < 16)
1435: fatal("%.200s line %d: RekeyLimit too small",
1436: filename, linenum);
1437: }
1438: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1439: options->rekey_limit = val64;
1.235 dtucker 1440: if (cp != NULL) { /* optional rekey interval present */
1441: if (strcmp(cp, "none") == 0) {
1442: (void)strdelim(&cp); /* discard */
1443: break;
1444: }
1445: intptr = &options->rekey_interval;
1446: goto parse_time;
1447: }
1448: break;
1449:
1.94 markus 1450: case sGatewayPorts:
1.251 millert 1451: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1452: multistate_ptr = multistate_gatewayports;
1453: goto parse_multistate;
1.25 markus 1454:
1.122 markus 1455: case sUseDNS:
1456: intptr = &options->use_dns;
1.94 markus 1457: goto parse_flag;
1.53 markus 1458:
1.94 markus 1459: case sLogFacility:
1.174 dtucker 1460: log_facility_ptr = &options->log_facility;
1.94 markus 1461: arg = strdelim(&cp);
1462: value = log_facility_number(arg);
1.101 markus 1463: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1464: fatal("%.200s line %d: unsupported log facility '%s'",
1465: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1466: if (*log_facility_ptr == -1)
1467: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1468: break;
1.25 markus 1469:
1.94 markus 1470: case sLogLevel:
1.174 dtucker 1471: log_level_ptr = &options->log_level;
1.94 markus 1472: arg = strdelim(&cp);
1473: value = log_level_number(arg);
1.101 markus 1474: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1475: fatal("%.200s line %d: unsupported log level '%s'",
1476: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1477: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1478: *log_level_ptr = (LogLevel) value;
1.94 markus 1479: break;
1480:
1481: case sAllowTcpForwarding:
1482: intptr = &options->allow_tcp_forwarding;
1.233 djm 1483: multistate_ptr = multistate_tcpfwd;
1484: goto parse_multistate;
1.102 provos 1485:
1.251 millert 1486: case sAllowStreamLocalForwarding:
1487: intptr = &options->allow_streamlocal_forwarding;
1488: multistate_ptr = multistate_tcpfwd;
1489: goto parse_multistate;
1490:
1.178 pyr 1491: case sAllowAgentForwarding:
1492: intptr = &options->allow_agent_forwarding;
1493: goto parse_flag;
1494:
1.301 djm 1495: case sDisableForwarding:
1496: intptr = &options->disable_forwarding;
1497: goto parse_flag;
1498:
1.94 markus 1499: case sAllowUsers:
1500: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1501: if (match_user(NULL, NULL, NULL, arg) == -1)
1502: fatal("%s line %d: invalid AllowUsers pattern: "
1503: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1504: if (!*activep)
1505: continue;
1.314 djm 1506: array_append(filename, linenum, "AllowUsers",
1507: &options->allow_users, &options->num_allow_users,
1508: arg);
1.94 markus 1509: }
1510: break;
1.25 markus 1511:
1.94 markus 1512: case sDenyUsers:
1513: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1514: if (match_user(NULL, NULL, NULL, arg) == -1)
1515: fatal("%s line %d: invalid DenyUsers pattern: "
1516: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1517: if (!*activep)
1518: continue;
1.314 djm 1519: array_append(filename, linenum, "DenyUsers",
1520: &options->deny_users, &options->num_deny_users,
1521: arg);
1.94 markus 1522: }
1523: break;
1.25 markus 1524:
1.94 markus 1525: case sAllowGroups:
1526: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1527: if (!*activep)
1528: continue;
1.314 djm 1529: array_append(filename, linenum, "AllowGroups",
1530: &options->allow_groups, &options->num_allow_groups,
1531: arg);
1.94 markus 1532: }
1533: break;
1.33 markus 1534:
1.94 markus 1535: case sDenyGroups:
1536: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1537: if (!*activep)
1538: continue;
1.314 djm 1539: array_append(filename, linenum, "DenyGroups",
1540: &options->deny_groups, &options->num_deny_groups,
1541: arg);
1.94 markus 1542: }
1543: break;
1.66 markus 1544:
1.94 markus 1545: case sCiphers:
1546: arg = strdelim(&cp);
1547: if (!arg || *arg == '\0')
1548: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1549: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1550: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1551: filename, linenum, arg ? arg : "<NONE>");
1552: if (options->ciphers == NULL)
1553: options->ciphers = xstrdup(arg);
1554: break;
1.33 markus 1555:
1.94 markus 1556: case sMacs:
1557: arg = strdelim(&cp);
1558: if (!arg || *arg == '\0')
1559: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1560: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1561: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1562: filename, linenum, arg ? arg : "<NONE>");
1563: if (options->macs == NULL)
1564: options->macs = xstrdup(arg);
1.211 djm 1565: break;
1566:
1567: case sKexAlgorithms:
1568: arg = strdelim(&cp);
1569: if (!arg || *arg == '\0')
1570: fatal("%s line %d: Missing argument.",
1571: filename, linenum);
1.304 djm 1572: if (*arg != '-' &&
1573: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.211 djm 1574: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1575: filename, linenum, arg ? arg : "<NONE>");
1576: if (options->kex_algorithms == NULL)
1577: options->kex_algorithms = xstrdup(arg);
1.94 markus 1578: break;
1.43 jakob 1579:
1.94 markus 1580: case sSubsystem:
1581: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1582: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1583: filename, linenum);
1.94 markus 1584: }
1585: arg = strdelim(&cp);
1586: if (!arg || *arg == '\0')
1587: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1588: filename, linenum);
1.153 dtucker 1589: if (!*activep) {
1590: arg = strdelim(&cp);
1591: break;
1592: }
1.94 markus 1593: for (i = 0; i < options->num_subsystems; i++)
1594: if (strcmp(arg, options->subsystem_name[i]) == 0)
1595: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1596: filename, linenum, arg);
1.94 markus 1597: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1598: arg = strdelim(&cp);
1599: if (!arg || *arg == '\0')
1600: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1601: filename, linenum);
1.94 markus 1602: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1603:
1604: /* Collect arguments (separate to executable) */
1605: p = xstrdup(arg);
1606: len = strlen(p) + 1;
1607: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1608: len += 1 + strlen(arg);
1.264 deraadt 1609: p = xreallocarray(p, 1, len);
1.151 djm 1610: strlcat(p, " ", len);
1611: strlcat(p, arg, len);
1612: }
1613: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1614: options->num_subsystems++;
1615: break;
1.46 markus 1616:
1.94 markus 1617: case sMaxStartups:
1618: arg = strdelim(&cp);
1619: if (!arg || *arg == '\0')
1620: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1621: filename, linenum);
1.94 markus 1622: if ((n = sscanf(arg, "%d:%d:%d",
1623: &options->max_startups_begin,
1624: &options->max_startups_rate,
1625: &options->max_startups)) == 3) {
1626: if (options->max_startups_begin >
1627: options->max_startups ||
1628: options->max_startups_rate > 100 ||
1629: options->max_startups_rate < 1)
1.50 markus 1630: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1631: filename, linenum);
1.94 markus 1632: } else if (n != 1)
1633: fatal("%s line %d: Illegal MaxStartups spec.",
1634: filename, linenum);
1635: else
1636: options->max_startups = options->max_startups_begin;
1637: break;
1.133 dtucker 1638:
1639: case sMaxAuthTries:
1640: intptr = &options->max_authtries;
1641: goto parse_int;
1.94 markus 1642:
1.180 djm 1643: case sMaxSessions:
1644: intptr = &options->max_sessions;
1645: goto parse_int;
1646:
1.94 markus 1647: case sBanner:
1648: charptr = &options->banner;
1649: goto parse_filename;
1.176 djm 1650:
1.94 markus 1651: /*
1652: * These options can contain %X options expanded at
1653: * connect time, so that you can specify paths like:
1654: *
1655: * AuthorizedKeysFile /etc/ssh_keys/%u
1656: */
1657: case sAuthorizedKeysFile:
1.219 djm 1658: if (*activep && options->num_authkeys_files == 0) {
1659: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1660: arg = tilde_expand_filename(arg, getuid());
1661: array_append(filename, linenum,
1662: "AuthorizedKeysFile",
1663: &options->authorized_keys_files,
1664: &options->num_authkeys_files, arg);
1665: free(arg);
1.219 djm 1666: }
1667: }
1668: return 0;
1669:
1.208 djm 1670: case sAuthorizedPrincipalsFile:
1671: charptr = &options->authorized_principals_file;
1.205 djm 1672: arg = strdelim(&cp);
1673: if (!arg || *arg == '\0')
1674: fatal("%s line %d: missing file name.",
1675: filename, linenum);
1676: if (*activep && *charptr == NULL) {
1.206 markus 1677: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1678: /* increase optional counter */
1679: if (intptr != NULL)
1680: *intptr = *intptr + 1;
1681: }
1682: break;
1.94 markus 1683:
1684: case sClientAliveInterval:
1685: intptr = &options->client_alive_interval;
1686: goto parse_time;
1687:
1688: case sClientAliveCountMax:
1689: intptr = &options->client_alive_count_max;
1690: goto parse_int;
1.131 djm 1691:
1692: case sAcceptEnv:
1693: while ((arg = strdelim(&cp)) && *arg != '\0') {
1694: if (strchr(arg, '=') != NULL)
1695: fatal("%s line %d: Invalid environment name.",
1696: filename, linenum);
1.153 dtucker 1697: if (!*activep)
1.227 markus 1698: continue;
1.314 djm 1699: array_append(filename, linenum, "AcceptEnv",
1700: &options->accept_env, &options->num_accept_env,
1701: arg);
1.131 djm 1702: }
1703: break;
1.145 reyk 1704:
1705: case sPermitTunnel:
1706: intptr = &options->permit_tun;
1.146 reyk 1707: arg = strdelim(&cp);
1708: if (!arg || *arg == '\0')
1709: fatal("%s line %d: Missing yes/point-to-point/"
1710: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1711: value = -1;
1712: for (i = 0; tunmode_desc[i].val != -1; i++)
1713: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1714: value = tunmode_desc[i].val;
1715: break;
1716: }
1717: if (value == -1)
1.146 reyk 1718: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1719: "no argument: %s", filename, linenum, arg);
1.268 djm 1720: if (*activep && *intptr == -1)
1.146 reyk 1721: *intptr = value;
1722: break;
1.94 markus 1723:
1.153 dtucker 1724: case sMatch:
1725: if (cmdline)
1726: fatal("Match directive not supported as a command-line "
1727: "option");
1.226 dtucker 1728: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1729: if (value < 0)
1730: fatal("%s line %d: Bad Match condition", filename,
1731: linenum);
1732: *activep = value;
1.156 dtucker 1733: break;
1734:
1735: case sPermitOpen:
1736: arg = strdelim(&cp);
1737: if (!arg || *arg == '\0')
1738: fatal("%s line %d: missing PermitOpen specification",
1739: filename, linenum);
1.313 djm 1740: value = options->num_permitted_opens; /* modified later */
1.310 djm 1741: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.313 djm 1742: if (*activep && value == 0) {
1.224 dtucker 1743: options->num_permitted_opens = 1;
1.310 djm 1744: options->permitted_opens = xcalloc(1,
1745: sizeof(*options->permitted_opens));
1746: options->permitted_opens[0] = xstrdup(arg);
1.311 dtucker 1747: }
1.156 dtucker 1748: break;
1749: }
1.159 dtucker 1750: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.310 djm 1751: arg2 = xstrdup(arg);
1.159 dtucker 1752: p = hpdelim(&arg);
1753: if (p == NULL)
1754: fatal("%s line %d: missing host in PermitOpen",
1755: filename, linenum);
1756: p = cleanhostname(p);
1.223 dtucker 1757: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1758: fatal("%s line %d: bad port number in "
1759: "PermitOpen", filename, linenum);
1.313 djm 1760: if (*activep && value == 0) {
1.314 djm 1761: array_append(filename, linenum,
1762: "PermitOpen",
1763: &options->permitted_opens,
1764: &options->num_permitted_opens, arg2);
1765: }
1766: free(arg2);
1.159 dtucker 1767: }
1.153 dtucker 1768: break;
1769:
1.158 dtucker 1770: case sForceCommand:
1.262 dtucker 1771: if (cp == NULL || *cp == '\0')
1.158 dtucker 1772: fatal("%.200s line %d: Missing argument.", filename,
1773: linenum);
1774: len = strspn(cp, WHITESPACE);
1775: if (*activep && options->adm_forced_command == NULL)
1776: options->adm_forced_command = xstrdup(cp + len);
1777: return 0;
1778:
1.176 djm 1779: case sChrootDirectory:
1780: charptr = &options->chroot_directory;
1.177 djm 1781:
1782: arg = strdelim(&cp);
1783: if (!arg || *arg == '\0')
1784: fatal("%s line %d: missing file name.",
1785: filename, linenum);
1786: if (*activep && *charptr == NULL)
1787: *charptr = xstrdup(arg);
1788: break;
1.176 djm 1789:
1.204 djm 1790: case sTrustedUserCAKeys:
1791: charptr = &options->trusted_user_ca_keys;
1792: goto parse_filename;
1793:
1794: case sRevokedKeys:
1795: charptr = &options->revoked_keys_file;
1796: goto parse_filename;
1797:
1.213 djm 1798: case sIPQoS:
1799: arg = strdelim(&cp);
1800: if ((value = parse_ipqos(arg)) == -1)
1801: fatal("%s line %d: Bad IPQoS value: %s",
1802: filename, linenum, arg);
1803: arg = strdelim(&cp);
1804: if (arg == NULL)
1805: value2 = value;
1806: else if ((value2 = parse_ipqos(arg)) == -1)
1807: fatal("%s line %d: Bad IPQoS value: %s",
1808: filename, linenum, arg);
1809: if (*activep) {
1810: options->ip_qos_interactive = value;
1811: options->ip_qos_bulk = value2;
1812: }
1813: break;
1814:
1.225 djm 1815: case sVersionAddendum:
1.262 dtucker 1816: if (cp == NULL || *cp == '\0')
1.225 djm 1817: fatal("%.200s line %d: Missing argument.", filename,
1818: linenum);
1819: len = strspn(cp, WHITESPACE);
1820: if (*activep && options->version_addendum == NULL) {
1821: if (strcasecmp(cp + len, "none") == 0)
1822: options->version_addendum = xstrdup("");
1823: else if (strchr(cp + len, '\r') != NULL)
1824: fatal("%.200s line %d: Invalid argument",
1825: filename, linenum);
1826: else
1827: options->version_addendum = xstrdup(cp + len);
1828: }
1829: return 0;
1830:
1.231 djm 1831: case sAuthorizedKeysCommand:
1.255 jsg 1832: if (cp == NULL)
1833: fatal("%.200s line %d: Missing argument.", filename,
1834: linenum);
1.231 djm 1835: len = strspn(cp, WHITESPACE);
1836: if (*activep && options->authorized_keys_command == NULL) {
1837: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1838: fatal("%.200s line %d: AuthorizedKeysCommand "
1839: "must be an absolute path",
1840: filename, linenum);
1841: options->authorized_keys_command = xstrdup(cp + len);
1842: }
1843: return 0;
1844:
1845: case sAuthorizedKeysCommandUser:
1846: charptr = &options->authorized_keys_command_user;
1847:
1848: arg = strdelim(&cp);
1.255 jsg 1849: if (!arg || *arg == '\0')
1850: fatal("%s line %d: missing AuthorizedKeysCommandUser "
1851: "argument.", filename, linenum);
1.231 djm 1852: if (*activep && *charptr == NULL)
1853: *charptr = xstrdup(arg);
1854: break;
1855:
1.270 djm 1856: case sAuthorizedPrincipalsCommand:
1857: if (cp == NULL)
1858: fatal("%.200s line %d: Missing argument.", filename,
1859: linenum);
1860: len = strspn(cp, WHITESPACE);
1861: if (*activep &&
1862: options->authorized_principals_command == NULL) {
1863: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1864: fatal("%.200s line %d: "
1865: "AuthorizedPrincipalsCommand must be "
1866: "an absolute path", filename, linenum);
1867: options->authorized_principals_command =
1868: xstrdup(cp + len);
1869: }
1870: return 0;
1871:
1872: case sAuthorizedPrincipalsCommandUser:
1873: charptr = &options->authorized_principals_command_user;
1874:
1875: arg = strdelim(&cp);
1876: if (!arg || *arg == '\0')
1877: fatal("%s line %d: missing "
1878: "AuthorizedPrincipalsCommandUser argument.",
1879: filename, linenum);
1880: if (*activep && *charptr == NULL)
1881: *charptr = xstrdup(arg);
1882: break;
1883:
1.232 djm 1884: case sAuthenticationMethods:
1.268 djm 1885: if (options->num_auth_methods == 0) {
1.291 djm 1886: value = 0; /* seen "any" pseudo-method */
1.292 djm 1887: value2 = 0; /* sucessfully parsed any method */
1.232 djm 1888: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 1889: if (strcmp(arg, "any") == 0) {
1890: if (options->num_auth_methods > 0) {
1891: fatal("%s line %d: \"any\" "
1892: "must appear alone in "
1893: "AuthenticationMethods",
1894: filename, linenum);
1895: }
1896: value = 1;
1897: } else if (value) {
1898: fatal("%s line %d: \"any\" must appear "
1899: "alone in AuthenticationMethods",
1900: filename, linenum);
1901: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 1902: fatal("%s line %d: invalid "
1903: "authentication method list.",
1904: filename, linenum);
1.291 djm 1905: }
1.292 djm 1906: value2 = 1;
1.268 djm 1907: if (!*activep)
1908: continue;
1.314 djm 1909: array_append(filename, linenum,
1910: "AuthenticationMethods",
1911: &options->auth_methods,
1912: &options->num_auth_methods, arg);
1.232 djm 1913: }
1.292 djm 1914: if (value2 == 0) {
1.291 djm 1915: fatal("%s line %d: no AuthenticationMethods "
1916: "specified", filename, linenum);
1917: }
1.232 djm 1918: }
1919: return 0;
1920:
1.251 millert 1921: case sStreamLocalBindMask:
1922: arg = strdelim(&cp);
1923: if (!arg || *arg == '\0')
1.268 djm 1924: fatal("%s line %d: missing StreamLocalBindMask "
1925: "argument.", filename, linenum);
1.251 millert 1926: /* Parse mode in octal format */
1927: value = strtol(arg, &p, 8);
1928: if (arg == p || value < 0 || value > 0777)
1929: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 1930: if (*activep)
1931: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 1932: break;
1933:
1934: case sStreamLocalBindUnlink:
1935: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1936: goto parse_flag;
1937:
1.256 djm 1938: case sFingerprintHash:
1939: arg = strdelim(&cp);
1940: if (!arg || *arg == '\0')
1941: fatal("%.200s line %d: Missing argument.",
1942: filename, linenum);
1943: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1944: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1945: filename, linenum, arg);
1946: if (*activep)
1947: options->fingerprint_hash = value;
1948: break;
1949:
1.309 djm 1950: case sExposeAuthInfo:
1951: intptr = &options->expose_userauth_info;
1952: goto parse_flag;
1953:
1.316 djm 1954: case sRDomain:
1955: charptr = &options->routing_domain;
1956: arg = strdelim(&cp);
1957: if (!arg || *arg == '\0')
1958: fatal("%.200s line %d: Missing argument.",
1959: filename, linenum);
1960: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
1961: !valid_rdomain(arg))
1962: fatal("%s line %d: bad routing domain",
1963: filename, linenum);
1964: if (*activep && *charptr == NULL)
1965: *charptr = xstrdup(arg);
1.321 dtucker 1966: break;
1.316 djm 1967:
1.94 markus 1968: case sDeprecated:
1.295 djm 1969: case sIgnore:
1.121 jakob 1970: case sUnsupported:
1.295 djm 1971: do_log2(opcode == sIgnore ?
1972: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
1973: "%s line %d: %s option %s", filename, linenum,
1974: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 1975: while (arg)
1976: arg = strdelim(&cp);
1977: break;
1978:
1979: default:
1980: fatal("%s line %d: Missing handler for opcode %s (%d)",
1981: filename, linenum, arg, opcode);
1982: }
1983: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1984: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1985: filename, linenum, arg);
1986: return 0;
1987: }
1988:
1989: /* Reads the server configuration file. */
1.25 markus 1990:
1.94 markus 1991: void
1.134 djm 1992: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1993: {
1.229 dtucker 1994: char line[4096], *cp;
1.94 markus 1995: FILE *f;
1.229 dtucker 1996: int lineno = 0;
1.81 stevesk 1997:
1.134 djm 1998: debug2("%s: filename %s", __func__, filename);
1999: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2000: perror(filename);
2001: exit(1);
2002: }
1.134 djm 2003: buffer_clear(conf);
2004: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 2005: lineno++;
2006: if (strlen(line) == sizeof(line) - 1)
2007: fatal("%s line %d too long", filename, lineno);
1.134 djm 2008: /*
2009: * Trim out comments and strip whitespace
1.135 deraadt 2010: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2011: * line numbers later for error messages
2012: */
2013: if ((cp = strchr(line, '#')) != NULL)
2014: memcpy(cp, "\n", 2);
2015: cp = line + strspn(line, " \t\r");
2016:
2017: buffer_append(conf, cp, strlen(cp));
2018: }
2019: buffer_append(conf, "\0", 1);
2020: fclose(f);
2021: debug2("%s: done config len = %d", __func__, buffer_len(conf));
2022: }
2023:
2024: void
1.226 dtucker 2025: parse_server_match_config(ServerOptions *options,
2026: struct connection_info *connectinfo)
1.153 dtucker 2027: {
2028: ServerOptions mo;
2029:
2030: initialize_server_options(&mo);
1.226 dtucker 2031: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 2032: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2033: }
2034:
1.226 dtucker 2035: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2036: {
2037: char *p;
2038:
2039: while ((p = strsep(&spec, ",")) && *p != '\0') {
2040: if (strncmp(p, "addr=", 5) == 0) {
2041: ci->address = xstrdup(p + 5);
2042: } else if (strncmp(p, "host=", 5) == 0) {
2043: ci->host = xstrdup(p + 5);
2044: } else if (strncmp(p, "user=", 5) == 0) {
2045: ci->user = xstrdup(p + 5);
2046: } else if (strncmp(p, "laddr=", 6) == 0) {
2047: ci->laddress = xstrdup(p + 6);
1.317 djm 2048: } else if (strncmp(p, "rdomain=", 8) == 0) {
2049: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2050: } else if (strncmp(p, "lport=", 6) == 0) {
2051: ci->lport = a2port(p + 6);
2052: if (ci->lport == -1) {
2053: fprintf(stderr, "Invalid port '%s' in test mode"
2054: " specification %s\n", p+6, p);
2055: return -1;
2056: }
2057: } else {
2058: fprintf(stderr, "Invalid test mode specification %s\n",
2059: p);
2060: return -1;
2061: }
2062: }
2063: return 0;
2064: }
2065:
1.168 dtucker 2066: /*
2067: * Copy any supported values that are set.
2068: *
1.195 jj 2069: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2070: * array values that are not used pre-authentication, because any that we
2071: * do use must be explictly sent in mm_getpwnamallow().
2072: */
1.153 dtucker 2073: void
1.168 dtucker 2074: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2075: {
1.247 djm 2076: #define M_CP_INTOPT(n) do {\
2077: if (src->n != -1) \
2078: dst->n = src->n; \
2079: } while (0)
2080:
1.168 dtucker 2081: M_CP_INTOPT(password_authentication);
2082: M_CP_INTOPT(gss_authentication);
2083: M_CP_INTOPT(pubkey_authentication);
2084: M_CP_INTOPT(kerberos_authentication);
2085: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2086: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2087: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2088: M_CP_INTOPT(permit_root_login);
1.188 djm 2089: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 2090:
2091: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2092: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2093: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2094: M_CP_INTOPT(disable_forwarding);
1.309 djm 2095: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2096: M_CP_INTOPT(permit_tun);
1.251 millert 2097: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2098: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2099: M_CP_INTOPT(x11_display_offset);
2100: M_CP_INTOPT(x11_forwarding);
2101: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2102: M_CP_INTOPT(permit_tty);
1.250 djm 2103: M_CP_INTOPT(permit_user_rc);
1.180 djm 2104: M_CP_INTOPT(max_sessions);
1.184 dtucker 2105: M_CP_INTOPT(max_authtries);
1.300 markus 2106: M_CP_INTOPT(client_alive_count_max);
2107: M_CP_INTOPT(client_alive_interval);
1.213 djm 2108: M_CP_INTOPT(ip_qos_interactive);
2109: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2110: M_CP_INTOPT(rekey_limit);
2111: M_CP_INTOPT(rekey_interval);
1.308 djm 2112: M_CP_INTOPT(log_level);
1.289 djm 2113:
2114: /*
2115: * The bind_mask is a mode_t that may be unsigned, so we can't use
2116: * M_CP_INTOPT - it does a signed comparison that causes compiler
2117: * warnings.
2118: */
1.290 dtucker 2119: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2120: dst->fwd_opts.streamlocal_bind_mask =
2121: src->fwd_opts.streamlocal_bind_mask;
2122: }
1.247 djm 2123:
2124: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2125: #define M_CP_STROPT(n) do {\
2126: if (src->n != NULL && dst->n != src->n) { \
2127: free(dst->n); \
2128: dst->n = src->n; \
2129: } \
2130: } while(0)
1.314 djm 2131: #define M_CP_STRARRAYOPT(s, num_s) do {\
2132: u_int i; \
2133: if (src->num_s != 0) { \
2134: for (i = 0; i < dst->num_s; i++) \
2135: free(dst->s[i]); \
2136: free(dst->s); \
2137: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2138: for (i = 0; i < src->num_s; i++) \
2139: dst->s[i] = xstrdup(src->s[i]); \
2140: dst->num_s = src->num_s; \
1.312 djm 2141: } \
2142: } while(0)
1.168 dtucker 2143:
1.218 djm 2144: /* See comment in servconf.h */
2145: COPY_MATCH_STRING_OPTS();
1.282 djm 2146:
2147: /* Arguments that accept '+...' need to be expanded */
2148: assemble_algorithms(dst);
1.216 djm 2149:
1.217 dtucker 2150: /*
2151: * The only things that should be below this point are string options
2152: * which are only used after authentication.
2153: */
1.168 dtucker 2154: if (preauth)
2155: return;
1.219 djm 2156:
1.283 djm 2157: /* These options may be "none" to clear a global setting */
1.168 dtucker 2158: M_CP_STROPT(adm_forced_command);
1.283 djm 2159: if (option_clear_or_none(dst->adm_forced_command)) {
2160: free(dst->adm_forced_command);
2161: dst->adm_forced_command = NULL;
2162: }
1.176 djm 2163: M_CP_STROPT(chroot_directory);
1.283 djm 2164: if (option_clear_or_none(dst->chroot_directory)) {
2165: free(dst->chroot_directory);
2166: dst->chroot_directory = NULL;
2167: }
1.153 dtucker 2168: }
1.168 dtucker 2169:
2170: #undef M_CP_INTOPT
2171: #undef M_CP_STROPT
1.219 djm 2172: #undef M_CP_STRARRAYOPT
1.153 dtucker 2173:
2174: void
2175: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 2176: struct connection_info *connectinfo)
1.134 djm 2177: {
1.153 dtucker 2178: int active, linenum, bad_options = 0;
1.136 dtucker 2179: char *cp, *obuf, *cbuf;
1.134 djm 2180:
2181: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
2182:
1.287 djm 2183: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2184: fatal("%s: sshbuf_dup_string failed", __func__);
1.226 dtucker 2185: active = connectinfo ? 0 : 1;
1.137 dtucker 2186: linenum = 1;
1.140 deraadt 2187: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 2188: if (process_server_config_line(options, cp, filename,
1.226 dtucker 2189: linenum++, &active, connectinfo) != 0)
1.94 markus 2190: bad_options++;
1.1 deraadt 2191: }
1.239 djm 2192: free(obuf);
1.78 stevesk 2193: if (bad_options > 0)
2194: fatal("%s: terminating, %d bad configuration options",
2195: filename, bad_options);
1.266 dtucker 2196: process_queued_listen_addrs(options);
1.182 dtucker 2197: }
2198:
2199: static const char *
1.221 djm 2200: fmt_multistate_int(int val, const struct multistate *m)
2201: {
2202: u_int i;
2203:
2204: for (i = 0; m[i].key != NULL; i++) {
2205: if (m[i].value == val)
2206: return m[i].key;
2207: }
2208: return "UNKNOWN";
2209: }
2210:
2211: static const char *
1.182 dtucker 2212: fmt_intarg(ServerOpCodes code, int val)
2213: {
1.221 djm 2214: if (val == -1)
2215: return "unset";
2216: switch (code) {
2217: case sAddressFamily:
2218: return fmt_multistate_int(val, multistate_addressfamily);
2219: case sPermitRootLogin:
2220: return fmt_multistate_int(val, multistate_permitrootlogin);
2221: case sGatewayPorts:
2222: return fmt_multistate_int(val, multistate_gatewayports);
2223: case sCompression:
2224: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2225: case sAllowTcpForwarding:
2226: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2227: case sAllowStreamLocalForwarding:
2228: return fmt_multistate_int(val, multistate_tcpfwd);
1.256 djm 2229: case sFingerprintHash:
2230: return ssh_digest_alg_name(val);
1.221 djm 2231: default:
2232: switch (val) {
2233: case 0:
2234: return "no";
2235: case 1:
2236: return "yes";
2237: default:
2238: return "UNKNOWN";
2239: }
1.182 dtucker 2240: }
2241: }
2242:
2243: static const char *
2244: lookup_opcode_name(ServerOpCodes code)
2245: {
2246: u_int i;
2247:
2248: for (i = 0; keywords[i].name != NULL; i++)
2249: if (keywords[i].opcode == code)
2250: return(keywords[i].name);
2251: return "UNKNOWN";
2252: }
2253:
2254: static void
2255: dump_cfg_int(ServerOpCodes code, int val)
2256: {
2257: printf("%s %d\n", lookup_opcode_name(code), val);
2258: }
2259:
2260: static void
1.263 dtucker 2261: dump_cfg_oct(ServerOpCodes code, int val)
2262: {
2263: printf("%s 0%o\n", lookup_opcode_name(code), val);
2264: }
2265:
2266: static void
1.182 dtucker 2267: dump_cfg_fmtint(ServerOpCodes code, int val)
2268: {
2269: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2270: }
2271:
2272: static void
2273: dump_cfg_string(ServerOpCodes code, const char *val)
2274: {
1.257 djm 2275: printf("%s %s\n", lookup_opcode_name(code),
2276: val == NULL ? "none" : val);
1.182 dtucker 2277: }
2278:
2279: static void
2280: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2281: {
2282: u_int i;
2283:
2284: for (i = 0; i < count; i++)
1.219 djm 2285: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2286: }
2287:
2288: static void
2289: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2290: {
2291: u_int i;
2292:
1.291 djm 2293: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2294: return;
1.219 djm 2295: printf("%s", lookup_opcode_name(code));
2296: for (i = 0; i < count; i++)
2297: printf(" %s", vals[i]);
1.291 djm 2298: if (code == sAuthenticationMethods && count == 0)
2299: printf(" any");
1.219 djm 2300: printf("\n");
1.182 dtucker 2301: }
2302:
1.315 djm 2303: static char *
2304: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2305: {
1.315 djm 2306: int r;
1.182 dtucker 2307: struct addrinfo *ai;
1.315 djm 2308: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2309: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2310:
1.263 dtucker 2311: /*
2312: * ListenAddress must be after Port. add_one_listen_addr pushes
2313: * addresses onto a stack, so to maintain ordering we need to
2314: * print these in reverse order.
2315: */
1.315 djm 2316: for (ai = la->addrs; ai; ai = ai->ai_next) {
2317: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2318: sizeof(addr), port, sizeof(port),
2319: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2320: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2321: continue;
2322: }
2323: laddr2 = laddr1;
2324: if (ai->ai_family == AF_INET6) {
2325: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2326: addr, port,
2327: la->rdomain == NULL ? "" : " rdomain ",
2328: la->rdomain == NULL ? "" : la->rdomain,
2329: laddr2);
1.182 dtucker 2330: } else {
1.315 djm 2331: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2332: addr, port,
2333: la->rdomain == NULL ? "" : " rdomain ",
2334: la->rdomain == NULL ? "" : la->rdomain,
2335: laddr2);
1.182 dtucker 2336: }
1.315 djm 2337: free(laddr2);
2338: }
2339: return laddr1;
2340: }
2341:
2342: void
2343: dump_config(ServerOptions *o)
2344: {
2345: char *s;
2346: u_int i;
2347:
2348: /* these are usually at the top of the config */
2349: for (i = 0; i < o->num_ports; i++)
2350: printf("port %d\n", o->ports[i]);
2351: dump_cfg_fmtint(sAddressFamily, o->address_family);
2352:
2353: for (i = 0; i < o->num_listen_addrs; i++) {
2354: s = format_listen_addrs(&o->listen_addrs[i]);
2355: printf("%s", s);
2356: free(s);
1.182 dtucker 2357: }
2358:
2359: /* integer arguments */
2360: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2361: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2362: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2363: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2364: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2365: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2366: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2367:
2368: /* formatted integer arguments */
2369: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2370: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2371: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2372: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2373: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2374: o->hostbased_uses_name_from_packet_only);
2375: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2376: #ifdef KRB5
1.182 dtucker 2377: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2378: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2379: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2380: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2381: #endif
2382: #ifdef GSSAPI
1.182 dtucker 2383: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2384: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2385: #endif
1.182 dtucker 2386: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2387: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2388: o->kbd_interactive_authentication);
2389: dump_cfg_fmtint(sChallengeResponseAuthentication,
2390: o->challenge_response_authentication);
2391: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2392: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2393: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2394: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2395: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2396: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2397: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2398: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2399: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2400: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2401: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2402: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2403: dump_cfg_fmtint(sUseDNS, o->use_dns);
2404: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2405: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2406: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2407: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2408: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2409: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2410: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2411:
2412: /* string arguments */
2413: dump_cfg_string(sPidFile, o->pid_file);
2414: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.252 djm 2415: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
2416: dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
1.182 dtucker 2417: dump_cfg_string(sBanner, o->banner);
2418: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2419: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2420: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2421: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 2422: dump_cfg_string(sAuthorizedPrincipalsFile,
2423: o->authorized_principals_file);
1.261 dtucker 2424: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2425: ? "none" : o->version_addendum);
1.231 djm 2426: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2427: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2428: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2429: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2430: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.252 djm 2431: dump_cfg_string(sKexAlgorithms,
1.253 djm 2432: o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
1.258 djm 2433: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
2434: o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
1.276 markus 2435: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
2436: o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG);
1.258 djm 2437: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ?
2438: o->pubkey_key_types : KEX_DEFAULT_PK_ALG);
1.316 djm 2439: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2440:
2441: /* string arguments requiring a lookup */
2442: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2443: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2444:
2445: /* string array arguments */
1.219 djm 2446: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2447: o->authorized_keys_files);
1.182 dtucker 2448: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2449: o->host_key_files);
1.261 dtucker 2450: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2451: o->host_cert_files);
1.182 dtucker 2452: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2453: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2454: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2455: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2456: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2457: dump_cfg_strarray_oneline(sAuthenticationMethods,
2458: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2459:
2460: /* other arguments */
2461: for (i = 0; i < o->num_subsystems; i++)
2462: printf("subsystem %s %s\n", o->subsystem_name[i],
2463: o->subsystem_args[i]);
2464:
2465: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2466: o->max_startups_rate, o->max_startups);
2467:
1.318 djm 2468: s = NULL;
2469: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2470: if (tunmode_desc[i].val == o->permit_tun) {
2471: s = tunmode_desc[i].text;
2472: break;
2473: }
1.318 djm 2474: }
1.182 dtucker 2475: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2476:
1.214 stevesk 2477: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2478: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2479:
1.284 dtucker 2480: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2481: o->rekey_interval);
1.182 dtucker 2482:
1.310 djm 2483: printf("permitopen");
2484: if (o->num_permitted_opens == 0)
2485: printf(" any");
2486: else {
2487: for (i = 0; i < o->num_permitted_opens; i++)
2488: printf(" %s", o->permitted_opens[i]);
2489: }
2490: printf("\n");
1.1 deraadt 2491: }
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