Annotation of src/usr.bin/ssh/servconf.c, Revision 1.325
1.226 dtucker 1:
1.325 ! markus 2: /* $OpenBSD: servconf.c,v 1.324 2018/02/16 02:32:40 djm 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);
1.325 ! markus 235: servconf_add_hostkey("[default]", 0, options,
! 236: _PATH_HOST_XMSS_KEY_FILE);
1.54 markus 237: }
1.203 djm 238: /* No certificates by default */
1.29 markus 239: if (options->num_ports == 0)
240: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 241: if (options->address_family == -1)
242: options->address_family = AF_UNSPEC;
1.29 markus 243: if (options->listen_addrs == NULL)
1.315 djm 244: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 245: if (options->pid_file == NULL)
1.257 djm 246: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 247: if (options->login_grace_time == -1)
1.115 stevesk 248: options->login_grace_time = 120;
1.67 markus 249: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 250: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 251: if (options->ignore_rhosts == -1)
1.30 markus 252: options->ignore_rhosts = 1;
1.25 markus 253: if (options->ignore_user_known_hosts == -1)
254: options->ignore_user_known_hosts = 0;
255: if (options->print_motd == -1)
256: options->print_motd = 1;
1.72 stevesk 257: if (options->print_lastlog == -1)
258: options->print_lastlog = 1;
1.25 markus 259: if (options->x11_forwarding == -1)
1.30 markus 260: options->x11_forwarding = 0;
1.25 markus 261: if (options->x11_display_offset == -1)
1.30 markus 262: options->x11_display_offset = 10;
1.99 stevesk 263: if (options->x11_use_localhost == -1)
264: options->x11_use_localhost = 1;
1.42 markus 265: if (options->xauth_location == NULL)
1.257 djm 266: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 267: if (options->permit_tty == -1)
268: options->permit_tty = 1;
1.250 djm 269: if (options->permit_user_rc == -1)
270: options->permit_user_rc = 1;
1.25 markus 271: if (options->strict_modes == -1)
272: options->strict_modes = 1;
1.129 markus 273: if (options->tcp_keep_alive == -1)
274: options->tcp_keep_alive = 1;
1.101 markus 275: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 276: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 277: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 278: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 279: if (options->hostbased_authentication == -1)
280: options->hostbased_authentication = 0;
281: if (options->hostbased_uses_name_from_packet_only == -1)
282: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 283: if (options->pubkey_authentication == -1)
284: options->pubkey_authentication = 1;
1.25 markus 285: if (options->kerberos_authentication == -1)
1.107 markus 286: options->kerberos_authentication = 0;
1.25 markus 287: if (options->kerberos_or_local_passwd == -1)
288: options->kerberos_or_local_passwd = 1;
289: if (options->kerberos_ticket_cleanup == -1)
290: options->kerberos_ticket_cleanup = 1;
1.130 jakob 291: if (options->kerberos_get_afs_token == -1)
292: options->kerberos_get_afs_token = 0;
1.125 markus 293: if (options->gss_authentication == -1)
294: options->gss_authentication = 0;
295: if (options->gss_cleanup_creds == -1)
296: options->gss_cleanup_creds = 1;
1.271 djm 297: if (options->gss_strict_acceptor == -1)
1.302 djm 298: options->gss_strict_acceptor = 1;
1.25 markus 299: if (options->password_authentication == -1)
300: options->password_authentication = 1;
1.52 markus 301: if (options->kbd_interactive_authentication == -1)
302: options->kbd_interactive_authentication = 0;
1.80 markus 303: if (options->challenge_response_authentication == -1)
304: options->challenge_response_authentication = 1;
1.25 markus 305: if (options->permit_empty_passwd == -1)
1.30 markus 306: options->permit_empty_passwd = 0;
1.113 markus 307: if (options->permit_user_env == -1)
308: options->permit_user_env = 0;
1.111 markus 309: if (options->compression == -1)
1.143 markus 310: options->compression = COMP_DELAYED;
1.235 dtucker 311: if (options->rekey_limit == -1)
312: options->rekey_limit = 0;
313: if (options->rekey_interval == -1)
314: options->rekey_interval = 0;
1.53 markus 315: if (options->allow_tcp_forwarding == -1)
1.233 djm 316: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 317: if (options->allow_streamlocal_forwarding == -1)
318: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 319: if (options->allow_agent_forwarding == -1)
320: options->allow_agent_forwarding = 1;
1.251 millert 321: if (options->fwd_opts.gateway_ports == -1)
322: options->fwd_opts.gateway_ports = 0;
1.46 markus 323: if (options->max_startups == -1)
1.234 dtucker 324: options->max_startups = 100;
1.50 markus 325: if (options->max_startups_rate == -1)
1.234 dtucker 326: options->max_startups_rate = 30; /* 30% */
1.50 markus 327: if (options->max_startups_begin == -1)
1.234 dtucker 328: options->max_startups_begin = 10;
1.133 dtucker 329: if (options->max_authtries == -1)
330: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 331: if (options->max_sessions == -1)
332: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 333: if (options->use_dns == -1)
1.260 deraadt 334: options->use_dns = 0;
1.77 beck 335: if (options->client_alive_interval == -1)
1.95 deraadt 336: options->client_alive_interval = 0;
1.77 beck 337: if (options->client_alive_count_max == -1)
338: options->client_alive_count_max = 3;
1.219 djm 339: if (options->num_authkeys_files == 0) {
1.314 djm 340: array_append("[default]", 0, "AuthorizedKeysFiles",
341: &options->authorized_keys_files,
342: &options->num_authkeys_files,
343: _PATH_SSH_USER_PERMITTED_KEYS);
344: array_append("[default]", 0, "AuthorizedKeysFiles",
345: &options->authorized_keys_files,
346: &options->num_authkeys_files,
347: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 348: }
1.145 reyk 349: if (options->permit_tun == -1)
1.146 reyk 350: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 351: if (options->ip_qos_interactive == -1)
352: options->ip_qos_interactive = IPTOS_LOWDELAY;
353: if (options->ip_qos_bulk == -1)
354: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 355: if (options->version_addendum == NULL)
356: options->version_addendum = xstrdup("");
1.251 millert 357: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
358: options->fwd_opts.streamlocal_bind_mask = 0177;
359: if (options->fwd_opts.streamlocal_bind_unlink == -1)
360: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 361: if (options->fingerprint_hash == -1)
362: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 363: if (options->disable_forwarding == -1)
364: options->disable_forwarding = 0;
1.309 djm 365: if (options->expose_userauth_info == -1)
366: options->expose_userauth_info = 0;
1.277 djm 367:
1.282 djm 368: assemble_algorithms(options);
1.277 djm 369:
1.285 djm 370: /* Turn privilege separation and sandboxing on by default */
1.102 provos 371: if (use_privsep == -1)
1.285 djm 372: use_privsep = PRIVSEP_ON;
1.257 djm 373:
374: #define CLEAR_ON_NONE(v) \
375: do { \
376: if (option_clear_or_none(v)) { \
377: free(v); \
378: v = NULL; \
379: } \
380: } while(0)
381: CLEAR_ON_NONE(options->pid_file);
382: CLEAR_ON_NONE(options->xauth_location);
383: CLEAR_ON_NONE(options->banner);
384: CLEAR_ON_NONE(options->trusted_user_ca_keys);
385: CLEAR_ON_NONE(options->revoked_keys_file);
1.267 djm 386: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 387: CLEAR_ON_NONE(options->adm_forced_command);
388: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 389: CLEAR_ON_NONE(options->routing_domain);
1.257 djm 390: for (i = 0; i < options->num_host_key_files; i++)
391: CLEAR_ON_NONE(options->host_key_files[i]);
392: for (i = 0; i < options->num_host_cert_files; i++)
393: CLEAR_ON_NONE(options->host_cert_files[i]);
394: #undef CLEAR_ON_NONE
1.291 djm 395:
396: /* Similar handling for AuthenticationMethods=any */
397: if (options->num_auth_methods == 1 &&
398: strcmp(options->auth_methods[0], "any") == 0) {
399: free(options->auth_methods[0]);
400: options->auth_methods[0] = NULL;
401: options->num_auth_methods = 0;
402: }
403:
1.1 deraadt 404: }
405:
406: /* Keyword tokens. */
1.25 markus 407: typedef enum {
408: sBadOption, /* == unknown option */
1.293 naddy 409: sPort, sHostKeyFile, sLoginGraceTime,
410: sPermitRootLogin, sLogFacility, sLogLevel,
1.25 markus 411: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 412: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 413: sPasswordAuthentication, sKbdInteractiveAuthentication,
414: sListenAddress, sAddressFamily,
1.72 stevesk 415: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 416: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 417: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 418: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 419: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 420: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 421: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
422: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 423: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 424: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 425: sHostKeyAlgorithms,
1.258 djm 426: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 427: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
428: sAcceptEnv, sPermitTunnel,
1.176 djm 429: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 430: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.249 djm 431: sHostCertificate,
1.208 djm 432: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 433: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.225 djm 434: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 435: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 436: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 437: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 438: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.316 djm 439: sExposeAuthInfo, sRDomain,
1.295 djm 440: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 441: } ServerOpCodes;
442:
1.153 dtucker 443: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
444: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
445: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
446:
1.1 deraadt 447: /* Textual representation of the tokens. */
1.25 markus 448: static struct {
449: const char *name;
450: ServerOpCodes opcode;
1.153 dtucker 451: u_int flags;
1.25 markus 452: } keywords[] = {
1.153 dtucker 453: { "port", sPort, SSHCFG_GLOBAL },
454: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
455: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 456: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 457: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 458: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 459: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 460: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 461: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 462: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 463: { "loglevel", sLogLevel, SSHCFG_ALL },
1.153 dtucker 464: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 465: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 466: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 467: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 468: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 469: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 470: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 471: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 472: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.153 dtucker 473: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 474: #ifdef KRB5
1.168 dtucker 475: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 476: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
477: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
478: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 479: #else
1.168 dtucker 480: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 481: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
482: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
483: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 484: #endif
1.153 dtucker 485: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
486: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 487: #ifdef GSSAPI
1.168 dtucker 488: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 489: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 490: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 491: #else
1.168 dtucker 492: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 493: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 494: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 495: #endif
1.168 dtucker 496: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
497: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 498: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 499: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
500: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
501: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
502: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
503: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
504: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
505: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
506: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 507: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
508: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
509: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 510: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
511: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 512: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 513: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 514: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 515: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 516: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 517: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
518: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
519: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 520: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 521: { "allowusers", sAllowUsers, SSHCFG_ALL },
522: { "denyusers", sDenyUsers, SSHCFG_ALL },
523: { "allowgroups", sAllowGroups, SSHCFG_ALL },
524: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 525: { "ciphers", sCiphers, SSHCFG_GLOBAL },
526: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 527: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 528: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
529: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
530: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 531: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 532: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 533: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 534: { "usedns", sUseDNS, SSHCFG_GLOBAL },
535: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
536: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 537: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
538: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 539: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 540: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 541: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 542: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 543: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 544: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 545: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 546: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 547: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 548: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 549: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 550: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 551: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
552: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 553: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 554: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 555: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 556: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
557: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 558: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
559: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 560: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 561: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 562: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
563: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
564: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 565: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 566: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 567: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 568: { "rdomain", sRDomain, SSHCFG_ALL },
1.153 dtucker 569: { NULL, sBadOption, 0 }
1.1 deraadt 570: };
571:
1.182 dtucker 572: static struct {
573: int val;
574: char *text;
575: } tunmode_desc[] = {
576: { SSH_TUNMODE_NO, "no" },
577: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
578: { SSH_TUNMODE_ETHERNET, "ethernet" },
579: { SSH_TUNMODE_YES, "yes" },
580: { -1, NULL }
581: };
582:
1.27 markus 583: /*
1.73 stevesk 584: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 585: */
1.1 deraadt 586:
1.34 markus 587: static ServerOpCodes
1.25 markus 588: parse_token(const char *cp, const char *filename,
1.153 dtucker 589: int linenum, u_int *flags)
1.1 deraadt 590: {
1.55 markus 591: u_int i;
1.1 deraadt 592:
1.25 markus 593: for (i = 0; keywords[i].name; i++)
1.153 dtucker 594: if (strcasecmp(cp, keywords[i].name) == 0) {
595: *flags = keywords[i].flags;
1.25 markus 596: return keywords[i].opcode;
1.153 dtucker 597: }
1.25 markus 598:
1.78 stevesk 599: error("%s: line %d: Bad configuration option: %s",
600: filename, linenum, cp);
1.25 markus 601: return sBadOption;
1.1 deraadt 602: }
603:
1.202 djm 604: char *
605: derelativise_path(const char *path)
606: {
1.259 deraadt 607: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 608:
1.257 djm 609: if (strcasecmp(path, "none") == 0)
610: return xstrdup("none");
1.202 djm 611: expanded = tilde_expand_filename(path, getuid());
612: if (*expanded == '/')
613: return expanded;
1.207 djm 614: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 615: fatal("%s: getcwd: %s", __func__, strerror(errno));
616: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 617: free(expanded);
1.202 djm 618: return ret;
619: }
620:
1.84 itojun 621: static void
1.315 djm 622: add_listen_addr(ServerOptions *options, const char *addr,
623: const char *rdomain, int port)
1.74 stevesk 624: {
1.142 djm 625: u_int i;
1.74 stevesk 626:
1.315 djm 627: if (port > 0)
628: add_one_listen_addr(options, addr, rdomain, port);
629: else {
630: for (i = 0; i < options->num_ports; i++) {
631: add_one_listen_addr(options, addr, rdomain,
632: options->ports[i]);
633: }
634: }
1.74 stevesk 635: }
636:
1.84 itojun 637: static void
1.315 djm 638: add_one_listen_addr(ServerOptions *options, const char *addr,
639: const char *rdomain, int port)
1.29 markus 640: {
641: struct addrinfo hints, *ai, *aitop;
642: char strport[NI_MAXSERV];
643: int gaierr;
1.315 djm 644: u_int i;
645:
646: /* Find listen_addrs entry for this rdomain */
647: for (i = 0; i < options->num_listen_addrs; i++) {
648: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
649: break;
650: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
651: continue;
652: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
653: break;
654: }
655: if (i >= options->num_listen_addrs) {
656: /* No entry for this rdomain; allocate one */
657: if (i >= INT_MAX)
658: fatal("%s: too many listen addresses", __func__);
659: options->listen_addrs = xrecallocarray(options->listen_addrs,
660: options->num_listen_addrs, options->num_listen_addrs + 1,
661: sizeof(*options->listen_addrs));
662: i = options->num_listen_addrs++;
663: if (rdomain != NULL)
664: options->listen_addrs[i].rdomain = xstrdup(rdomain);
665: }
666: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 667:
1.74 stevesk 668: memset(&hints, 0, sizeof(hints));
1.138 djm 669: hints.ai_family = options->address_family;
1.74 stevesk 670: hints.ai_socktype = SOCK_STREAM;
671: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 672: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 673: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
674: fatal("bad addr or host: %s (%s)",
675: addr ? addr : "<NULL>",
1.173 dtucker 676: ssh_gai_strerror(gaierr));
1.74 stevesk 677: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
678: ;
1.315 djm 679: ai->ai_next = options->listen_addrs[i].addrs;
680: options->listen_addrs[i].addrs = aitop;
681: }
682:
683: /* Returns nonzero if the routing domain name is valid */
684: static int
685: valid_rdomain(const char *name)
686: {
687: const char *errstr;
688: long long num;
689: struct rt_tableinfo info;
690: int mib[6];
691: size_t miblen = sizeof(mib);
692:
693: if (name == NULL)
694: return 1;
695:
696: num = strtonum(name, 0, 255, &errstr);
697: if (errstr != NULL)
698: return 0;
699:
700: /* Check whether the table actually exists */
701: memset(mib, 0, sizeof(mib));
702: mib[0] = CTL_NET;
703: mib[1] = PF_ROUTE;
704: mib[4] = NET_RT_TABLE;
705: mib[5] = (int)num;
706: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
707: return 0;
708:
709: return 1;
1.29 markus 710: }
711:
1.266 dtucker 712: /*
713: * Queue a ListenAddress to be processed once we have all of the Ports
714: * and AddressFamily options.
715: */
716: static void
1.315 djm 717: queue_listen_addr(ServerOptions *options, const char *addr,
718: const char *rdomain, int port)
1.266 dtucker 719: {
1.315 djm 720: struct queued_listenaddr *qla;
721:
722: options->queued_listen_addrs = xrecallocarray(
723: options->queued_listen_addrs,
724: options->num_queued_listens, options->num_queued_listens + 1,
725: sizeof(*options->queued_listen_addrs));
726: qla = &options->queued_listen_addrs[options->num_queued_listens++];
727: qla->addr = xstrdup(addr);
728: qla->port = port;
729: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 730: }
731:
732: /*
733: * Process queued (text) ListenAddress entries.
734: */
735: static void
736: process_queued_listen_addrs(ServerOptions *options)
737: {
738: u_int i;
1.315 djm 739: struct queued_listenaddr *qla;
1.266 dtucker 740:
741: if (options->num_ports == 0)
742: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
743: if (options->address_family == -1)
744: options->address_family = AF_UNSPEC;
745:
746: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 747: qla = &options->queued_listen_addrs[i];
748: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
749: free(qla->addr);
750: free(qla->rdomain);
1.266 dtucker 751: }
752: free(options->queued_listen_addrs);
753: options->queued_listen_addrs = NULL;
754: options->num_queued_listens = 0;
755: }
756:
1.310 djm 757: /*
758: * Inform channels layer of permitopen options from configuration.
759: */
760: void
761: process_permitopen(struct ssh *ssh, ServerOptions *options)
762: {
763: u_int i;
764: int port;
765: char *host, *arg, *oarg;
766:
767: channel_clear_adm_permitted_opens(ssh);
768: if (options->num_permitted_opens == 0)
769: return; /* permit any */
770:
771: /* handle keywords: "any" / "none" */
772: if (options->num_permitted_opens == 1 &&
773: strcmp(options->permitted_opens[0], "any") == 0)
774: return;
775: if (options->num_permitted_opens == 1 &&
776: strcmp(options->permitted_opens[0], "none") == 0) {
777: channel_disable_adm_local_opens(ssh);
778: return;
779: }
780: /* Otherwise treat it as a list of permitted host:port */
781: for (i = 0; i < options->num_permitted_opens; i++) {
782: oarg = arg = xstrdup(options->permitted_opens[i]);
783: host = hpdelim(&arg);
784: if (host == NULL)
785: fatal("%s: missing host in PermitOpen", __func__);
786: host = cleanhostname(host);
787: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
788: fatal("%s: bad port number in PermitOpen", __func__);
789: /* Send it to channels layer */
790: channel_add_adm_permitted_opens(ssh, host, port);
791: free(oarg);
792: }
793: }
794:
1.226 dtucker 795: struct connection_info *
796: get_connection_info(int populate, int use_dns)
797: {
1.286 djm 798: struct ssh *ssh = active_state; /* XXX */
1.226 dtucker 799: static struct connection_info ci;
800:
801: if (!populate)
802: return &ci;
1.286 djm 803: ci.host = auth_get_canonical_hostname(ssh, use_dns);
804: ci.address = ssh_remote_ipaddr(ssh);
805: ci.laddress = ssh_local_ipaddr(ssh);
806: ci.lport = ssh_local_port(ssh);
1.317 djm 807: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 808: return &ci;
809: }
810:
1.153 dtucker 811: /*
812: * The strategy for the Match blocks is that the config file is parsed twice.
813: *
814: * The first time is at startup. activep is initialized to 1 and the
815: * directives in the global context are processed and acted on. Hitting a
816: * Match directive unsets activep and the directives inside the block are
817: * checked for syntax only.
818: *
819: * The second time is after a connection has been established but before
820: * authentication. activep is initialized to 2 and global config directives
821: * are ignored since they have already been processed. If the criteria in a
822: * Match block is met, activep is set and the subsequent directives
823: * processed and actioned until EOF or another Match block unsets it. Any
824: * options set are copied into the main server config.
825: *
826: * Potential additions/improvements:
1.295 djm 827: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 828: *
829: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
830: * Match Address 192.168.0.*
831: * Tag trusted
832: * Match Group wheel
833: * Tag trusted
834: * Match Tag trusted
835: * AllowTcpForwarding yes
836: * GatewayPorts clientspecified
837: * [...]
838: *
839: * - Add a PermittedChannelRequests directive
840: * Match Group shell
841: * PermittedChannelRequests session,forwarded-tcpip
842: */
843:
844: static int
1.165 dtucker 845: match_cfg_line_group(const char *grps, int line, const char *user)
846: {
847: int result = 0;
848: struct passwd *pw;
849:
850: if (user == NULL)
851: goto out;
852:
853: if ((pw = getpwnam(user)) == NULL) {
854: debug("Can't match group at line %d because user %.100s does "
855: "not exist", line, user);
856: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
857: debug("Can't Match group because user %.100s not in any group "
858: "at line %d", user, line);
1.186 djm 859: } else if (ga_match_pattern_list(grps) != 1) {
860: debug("user %.100s does not match group list %.100s at line %d",
861: user, grps, line);
1.165 dtucker 862: } else {
1.186 djm 863: debug("user %.100s matched group list %.100s at line %d", user,
864: grps, line);
1.165 dtucker 865: result = 1;
866: }
867: out:
868: ga_free();
869: return result;
870: }
871:
1.319 dtucker 872: static void
873: match_test_missing_fatal(const char *criteria, const char *attrib)
874: {
875: fatal("'Match %s' in configuration but '%s' not in connection "
876: "test specification.", criteria, attrib);
877: }
878:
1.226 dtucker 879: /*
1.230 dtucker 880: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 881: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 882: * not match.
1.226 dtucker 883: */
1.165 dtucker 884: static int
1.226 dtucker 885: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 886: {
1.243 dtucker 887: int result = 1, attributes = 0, port;
1.153 dtucker 888: char *arg, *attrib, *cp = *condition;
889:
1.226 dtucker 890: if (ci == NULL)
1.153 dtucker 891: debug3("checking syntax for 'Match %s'", cp);
892: else
1.226 dtucker 893: debug3("checking match for '%s' user %s host %s addr %s "
894: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
895: ci->host ? ci->host : "(null)",
896: ci->address ? ci->address : "(null)",
897: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 898:
899: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 900: attributes++;
901: if (strcasecmp(attrib, "all") == 0) {
902: if (attributes != 1 ||
903: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
904: error("'all' cannot be combined with other "
905: "Match attributes");
906: return -1;
907: }
908: *condition = cp;
909: return 1;
910: }
1.153 dtucker 911: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
912: error("Missing Match criteria for %s", attrib);
913: return -1;
914: }
915: if (strcasecmp(attrib, "user") == 0) {
1.319 dtucker 916: if (ci == NULL) {
1.153 dtucker 917: result = 0;
918: continue;
919: }
1.319 dtucker 920: if (ci->user == NULL)
921: match_test_missing_fatal("User", "user");
1.269 djm 922: if (match_pattern_list(ci->user, arg, 0) != 1)
1.153 dtucker 923: result = 0;
924: else
925: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 926: "line %d", ci->user, arg, line);
1.165 dtucker 927: } else if (strcasecmp(attrib, "group") == 0) {
1.319 dtucker 928: if (ci == NULL) {
1.226 dtucker 929: result = 0;
930: continue;
931: }
1.319 dtucker 932: if (ci->user == NULL)
933: match_test_missing_fatal("Group", "user");
1.226 dtucker 934: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 935: case -1:
936: return -1;
937: case 0:
938: result = 0;
939: }
1.153 dtucker 940: } else if (strcasecmp(attrib, "host") == 0) {
1.319 dtucker 941: if (ci == NULL) {
1.153 dtucker 942: result = 0;
943: continue;
944: }
1.319 dtucker 945: if (ci->host == NULL)
946: match_test_missing_fatal("Host", "host");
1.269 djm 947: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 948: result = 0;
949: else
950: debug("connection from %.100s matched 'Host "
1.226 dtucker 951: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 952: } else if (strcasecmp(attrib, "address") == 0) {
1.319 dtucker 953: if (ci == NULL) {
1.226 dtucker 954: result = 0;
955: continue;
956: }
1.319 dtucker 957: if (ci->address == NULL)
958: match_test_missing_fatal("Address", "addr");
1.226 dtucker 959: switch (addr_match_list(ci->address, arg)) {
1.181 djm 960: case 1:
961: debug("connection from %.100s matched 'Address "
1.226 dtucker 962: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 963: break;
964: case 0:
1.183 djm 965: case -1:
1.153 dtucker 966: result = 0;
1.181 djm 967: break;
1.183 djm 968: case -2:
1.181 djm 969: return -1;
1.153 dtucker 970: }
1.226 dtucker 971: } else if (strcasecmp(attrib, "localaddress") == 0){
1.319 dtucker 972: if (ci == NULL) {
1.226 dtucker 973: result = 0;
974: continue;
975: }
1.319 dtucker 976: if (ci->laddress == NULL)
977: match_test_missing_fatal("LocalAddress",
978: "laddr");
1.226 dtucker 979: switch (addr_match_list(ci->laddress, arg)) {
980: case 1:
981: debug("connection from %.100s matched "
982: "'LocalAddress %.100s' at line %d",
983: ci->laddress, arg, line);
984: break;
985: case 0:
986: case -1:
987: result = 0;
988: break;
989: case -2:
990: return -1;
991: }
992: } else if (strcasecmp(attrib, "localport") == 0) {
993: if ((port = a2port(arg)) == -1) {
994: error("Invalid LocalPort '%s' on Match line",
995: arg);
996: return -1;
997: }
1.319 dtucker 998: if (ci == NULL) {
1.226 dtucker 999: result = 0;
1000: continue;
1001: }
1.319 dtucker 1002: if (ci->lport == 0)
1003: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1004: /* TODO support port lists */
1005: if (port == ci->lport)
1006: debug("connection from %.100s matched "
1007: "'LocalPort %d' at line %d",
1008: ci->laddress, port, line);
1009: else
1010: result = 0;
1.317 djm 1011: } else if (strcasecmp(attrib, "rdomain") == 0) {
1012: if (ci == NULL || ci->rdomain == NULL) {
1013: result = 0;
1014: continue;
1015: }
1016: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1017: result = 0;
1018: else
1019: debug("user %.100s matched 'RDomain %.100s' at "
1020: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1021: } else {
1022: error("Unsupported Match attribute %s", attrib);
1023: return -1;
1024: }
1.243 dtucker 1025: }
1026: if (attributes == 0) {
1027: error("One or more attributes required for Match");
1028: return -1;
1.153 dtucker 1029: }
1.226 dtucker 1030: if (ci != NULL)
1.153 dtucker 1031: debug3("match %sfound", result ? "" : "not ");
1032: *condition = cp;
1033: return result;
1034: }
1035:
1.158 dtucker 1036: #define WHITESPACE " \t\r\n"
1037:
1.220 djm 1038: /* Multistate option parsing */
1039: struct multistate {
1040: char *key;
1041: int value;
1042: };
1.320 djm 1043: static const struct multistate multistate_flag[] = {
1044: { "yes", 1 },
1045: { "no", 0 },
1046: { NULL, -1 }
1047: };
1.220 djm 1048: static const struct multistate multistate_addressfamily[] = {
1049: { "inet", AF_INET },
1050: { "inet6", AF_INET6 },
1051: { "any", AF_UNSPEC },
1052: { NULL, -1 }
1053: };
1054: static const struct multistate multistate_permitrootlogin[] = {
1055: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1056: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1057: { "forced-commands-only", PERMIT_FORCED_ONLY },
1058: { "yes", PERMIT_YES },
1059: { "no", PERMIT_NO },
1060: { NULL, -1 }
1061: };
1062: static const struct multistate multistate_compression[] = {
1.297 djm 1063: { "yes", COMP_DELAYED },
1.220 djm 1064: { "delayed", COMP_DELAYED },
1065: { "no", COMP_NONE },
1066: { NULL, -1 }
1067: };
1068: static const struct multistate multistate_gatewayports[] = {
1069: { "clientspecified", 2 },
1070: { "yes", 1 },
1071: { "no", 0 },
1.222 djm 1072: { NULL, -1 }
1073: };
1.233 djm 1074: static const struct multistate multistate_tcpfwd[] = {
1075: { "yes", FORWARD_ALLOW },
1076: { "all", FORWARD_ALLOW },
1077: { "no", FORWARD_DENY },
1078: { "remote", FORWARD_REMOTE },
1079: { "local", FORWARD_LOCAL },
1080: { NULL, -1 }
1081: };
1.220 djm 1082:
1.94 markus 1083: int
1084: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 1085: const char *filename, int linenum, int *activep,
1086: struct connection_info *connectinfo)
1.1 deraadt 1087: {
1.310 djm 1088: char *cp, **charptr, *arg, *arg2, *p;
1.237 dtucker 1089: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 1090: SyslogFacility *log_facility_ptr;
1091: LogLevel *log_level_ptr;
1.25 markus 1092: ServerOpCodes opcode;
1.153 dtucker 1093: u_int i, flags = 0;
1.151 djm 1094: size_t len;
1.237 dtucker 1095: long long val64;
1.220 djm 1096: const struct multistate *multistate_ptr;
1.322 dtucker 1097: const char *errstr;
1.303 djm 1098:
1099: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1100: if ((len = strlen(line)) == 0)
1101: return 0;
1102: for (len--; len > 0; len--) {
1103: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1104: break;
1105: line[len] = '\0';
1106: }
1.25 markus 1107:
1.94 markus 1108: cp = line;
1.148 dtucker 1109: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1110: return 0;
1.94 markus 1111: /* Ignore leading whitespace */
1112: if (*arg == '\0')
1113: arg = strdelim(&cp);
1114: if (!arg || !*arg || *arg == '#')
1115: return 0;
1116: intptr = NULL;
1117: charptr = NULL;
1.153 dtucker 1118: opcode = parse_token(arg, filename, linenum, &flags);
1119:
1120: if (activep == NULL) { /* We are processing a command line directive */
1121: cmdline = 1;
1122: activep = &cmdline;
1123: }
1124: if (*activep && opcode != sMatch)
1125: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1126: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1127: if (connectinfo == NULL) {
1.153 dtucker 1128: fatal("%s line %d: Directive '%s' is not allowed "
1129: "within a Match block", filename, linenum, arg);
1130: } else { /* this is a directive we have already processed */
1131: while (arg)
1132: arg = strdelim(&cp);
1133: return 0;
1134: }
1135: }
1136:
1.94 markus 1137: switch (opcode) {
1138: case sBadOption:
1139: return -1;
1140: case sPort:
1141: /* ignore ports from configfile if cmdline specifies ports */
1142: if (options->ports_from_cmdline)
1143: return 0;
1144: if (options->num_ports >= MAX_PORTS)
1145: fatal("%s line %d: too many ports.",
1146: filename, linenum);
1.48 provos 1147: arg = strdelim(&cp);
1.94 markus 1148: if (!arg || *arg == '\0')
1149: fatal("%s line %d: missing port number.",
1150: filename, linenum);
1151: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1152: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1153: fatal("%s line %d: Badly formatted port number.",
1154: filename, linenum);
1155: break;
1.29 markus 1156:
1.94 markus 1157: case sLoginGraceTime:
1158: intptr = &options->login_grace_time;
1.180 djm 1159: parse_time:
1.94 markus 1160: arg = strdelim(&cp);
1161: if (!arg || *arg == '\0')
1162: fatal("%s line %d: missing time value.",
1163: filename, linenum);
1164: if ((value = convtime(arg)) == -1)
1165: fatal("%s line %d: invalid time value.",
1166: filename, linenum);
1.268 djm 1167: if (*activep && *intptr == -1)
1.94 markus 1168: *intptr = value;
1169: break;
1170:
1171: case sListenAddress:
1172: arg = strdelim(&cp);
1.139 djm 1173: if (arg == NULL || *arg == '\0')
1174: fatal("%s line %d: missing address",
1.94 markus 1175: filename, linenum);
1.144 dtucker 1176: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1177: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1178: && strchr(p+1, ':') != NULL) {
1.315 djm 1179: port = 0;
1180: p = arg;
1181: } else {
1182: p = hpdelim(&arg);
1183: if (p == NULL)
1184: fatal("%s line %d: bad address:port usage",
1185: filename, linenum);
1186: p = cleanhostname(p);
1187: if (arg == NULL)
1188: port = 0;
1189: else if ((port = a2port(arg)) <= 0)
1190: fatal("%s line %d: bad port number",
1191: filename, linenum);
1192: }
1193: /* Optional routing table */
1194: arg2 = NULL;
1195: if ((arg = strdelim(&cp)) != NULL) {
1196: if (strcmp(arg, "rdomain") != 0 ||
1197: (arg2 = strdelim(&cp)) == NULL)
1198: fatal("%s line %d: bad ListenAddress syntax",
1199: filename, linenum);
1200: if (!valid_rdomain(arg2))
1201: fatal("%s line %d: bad routing domain",
1202: filename, linenum);
1.144 dtucker 1203: }
1.139 djm 1204:
1.315 djm 1205: queue_listen_addr(options, p, arg2, port);
1.25 markus 1206:
1.138 djm 1207: break;
1208:
1209: case sAddressFamily:
1.220 djm 1210: intptr = &options->address_family;
1211: multistate_ptr = multistate_addressfamily;
1212: parse_multistate:
1.138 djm 1213: arg = strdelim(&cp);
1.141 markus 1214: if (!arg || *arg == '\0')
1.220 djm 1215: fatal("%s line %d: missing argument.",
1.141 markus 1216: filename, linenum);
1.220 djm 1217: value = -1;
1218: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1219: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1220: value = multistate_ptr[i].value;
1221: break;
1222: }
1223: }
1224: if (value == -1)
1225: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1226: filename, linenum, arg);
1.220 djm 1227: if (*activep && *intptr == -1)
1.138 djm 1228: *intptr = value;
1.94 markus 1229: break;
1230:
1231: case sHostKeyFile:
1232: arg = strdelim(&cp);
1233: if (!arg || *arg == '\0')
1234: fatal("%s line %d: missing file name.",
1235: filename, linenum);
1.314 djm 1236: if (*activep)
1237: servconf_add_hostkey(filename, linenum, options, arg);
1.94 markus 1238: break;
1.76 stevesk 1239:
1.240 markus 1240: case sHostKeyAgent:
1241: charptr = &options->host_key_agent;
1242: arg = strdelim(&cp);
1243: if (!arg || *arg == '\0')
1244: fatal("%s line %d: missing socket name.",
1245: filename, linenum);
1246: if (*activep && *charptr == NULL)
1247: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1248: xstrdup(arg) : derelativise_path(arg);
1249: break;
1250:
1.203 djm 1251: case sHostCertificate:
1.314 djm 1252: arg = strdelim(&cp);
1253: if (!arg || *arg == '\0')
1254: fatal("%s line %d: missing file name.",
1255: filename, linenum);
1256: if (*activep)
1257: servconf_add_hostcert(filename, linenum, options, arg);
1258: break;
1.203 djm 1259:
1.94 markus 1260: case sPidFile:
1261: charptr = &options->pid_file;
1.314 djm 1262: parse_filename:
1263: arg = strdelim(&cp);
1264: if (!arg || *arg == '\0')
1265: fatal("%s line %d: missing file name.",
1266: filename, linenum);
1267: if (*activep && *charptr == NULL) {
1268: *charptr = derelativise_path(arg);
1269: /* increase optional counter */
1270: if (intptr != NULL)
1271: *intptr = *intptr + 1;
1272: }
1273: break;
1.25 markus 1274:
1.94 markus 1275: case sPermitRootLogin:
1276: intptr = &options->permit_root_login;
1.220 djm 1277: multistate_ptr = multistate_permitrootlogin;
1278: goto parse_multistate;
1.36 markus 1279:
1.94 markus 1280: case sIgnoreRhosts:
1281: intptr = &options->ignore_rhosts;
1.180 djm 1282: parse_flag:
1.320 djm 1283: multistate_ptr = multistate_flag;
1284: goto parse_multistate;
1.94 markus 1285:
1286: case sIgnoreUserKnownHosts:
1287: intptr = &options->ignore_user_known_hosts;
1288: goto parse_flag;
1289:
1290: case sHostbasedAuthentication:
1291: intptr = &options->hostbased_authentication;
1292: goto parse_flag;
1293:
1294: case sHostbasedUsesNameFromPacketOnly:
1295: intptr = &options->hostbased_uses_name_from_packet_only;
1296: goto parse_flag;
1297:
1.258 djm 1298: case sHostbasedAcceptedKeyTypes:
1299: charptr = &options->hostbased_key_types;
1300: parse_keytypes:
1301: arg = strdelim(&cp);
1302: if (!arg || *arg == '\0')
1303: fatal("%s line %d: Missing argument.",
1304: filename, linenum);
1.304 djm 1305: if (*arg != '-' &&
1306: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.258 djm 1307: fatal("%s line %d: Bad key types '%s'.",
1308: filename, linenum, arg ? arg : "<NONE>");
1309: if (*activep && *charptr == NULL)
1310: *charptr = xstrdup(arg);
1311: break;
1312:
1.276 markus 1313: case sHostKeyAlgorithms:
1314: charptr = &options->hostkeyalgorithms;
1315: goto parse_keytypes;
1316:
1.94 markus 1317: case sPubkeyAuthentication:
1318: intptr = &options->pubkey_authentication;
1319: goto parse_flag;
1.119 jakob 1320:
1.258 djm 1321: case sPubkeyAcceptedKeyTypes:
1322: charptr = &options->pubkey_key_types;
1323: goto parse_keytypes;
1324:
1.94 markus 1325: case sKerberosAuthentication:
1326: intptr = &options->kerberos_authentication;
1327: goto parse_flag;
1328:
1329: case sKerberosOrLocalPasswd:
1330: intptr = &options->kerberos_or_local_passwd;
1331: goto parse_flag;
1332:
1333: case sKerberosTicketCleanup:
1334: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1335: goto parse_flag;
1336:
1337: case sKerberosGetAFSToken:
1338: intptr = &options->kerberos_get_afs_token;
1.125 markus 1339: goto parse_flag;
1340:
1341: case sGssAuthentication:
1342: intptr = &options->gss_authentication;
1343: goto parse_flag;
1344:
1345: case sGssCleanupCreds:
1346: intptr = &options->gss_cleanup_creds;
1.271 djm 1347: goto parse_flag;
1348:
1349: case sGssStrictAcceptor:
1350: intptr = &options->gss_strict_acceptor;
1.94 markus 1351: goto parse_flag;
1352:
1353: case sPasswordAuthentication:
1354: intptr = &options->password_authentication;
1355: goto parse_flag;
1356:
1357: case sKbdInteractiveAuthentication:
1358: intptr = &options->kbd_interactive_authentication;
1359: goto parse_flag;
1360:
1361: case sChallengeResponseAuthentication:
1362: intptr = &options->challenge_response_authentication;
1363: goto parse_flag;
1364:
1365: case sPrintMotd:
1366: intptr = &options->print_motd;
1367: goto parse_flag;
1368:
1369: case sPrintLastLog:
1370: intptr = &options->print_lastlog;
1371: goto parse_flag;
1372:
1373: case sX11Forwarding:
1374: intptr = &options->x11_forwarding;
1375: goto parse_flag;
1376:
1377: case sX11DisplayOffset:
1378: intptr = &options->x11_display_offset;
1.293 naddy 1379: parse_int:
1380: arg = strdelim(&cp);
1.322 dtucker 1381: if ((errstr = atoi_err(arg, &value)) != NULL)
1382: fatal("%s line %d: integer value %s.",
1383: filename, linenum, errstr);
1.293 naddy 1384: if (*activep && *intptr == -1)
1385: *intptr = value;
1386: break;
1.99 stevesk 1387:
1388: case sX11UseLocalhost:
1389: intptr = &options->x11_use_localhost;
1390: goto parse_flag;
1.94 markus 1391:
1392: case sXAuthLocation:
1393: charptr = &options->xauth_location;
1394: goto parse_filename;
1395:
1.244 djm 1396: case sPermitTTY:
1397: intptr = &options->permit_tty;
1398: goto parse_flag;
1399:
1.250 djm 1400: case sPermitUserRC:
1401: intptr = &options->permit_user_rc;
1402: goto parse_flag;
1403:
1.94 markus 1404: case sStrictModes:
1405: intptr = &options->strict_modes;
1406: goto parse_flag;
1407:
1.129 markus 1408: case sTCPKeepAlive:
1409: intptr = &options->tcp_keep_alive;
1.94 markus 1410: goto parse_flag;
1411:
1412: case sEmptyPasswd:
1413: intptr = &options->permit_empty_passwd;
1.113 markus 1414: goto parse_flag;
1415:
1416: case sPermitUserEnvironment:
1417: intptr = &options->permit_user_env;
1.94 markus 1418: goto parse_flag;
1419:
1.111 markus 1420: case sCompression:
1421: intptr = &options->compression;
1.220 djm 1422: multistate_ptr = multistate_compression;
1423: goto parse_multistate;
1.94 markus 1424:
1.235 dtucker 1425: case sRekeyLimit:
1426: arg = strdelim(&cp);
1427: if (!arg || *arg == '\0')
1428: fatal("%.200s line %d: Missing argument.", filename,
1429: linenum);
1430: if (strcmp(arg, "default") == 0) {
1431: val64 = 0;
1432: } else {
1.236 dtucker 1433: if (scan_scaled(arg, &val64) == -1)
1434: fatal("%.200s line %d: Bad number '%s': %s",
1435: filename, linenum, arg, strerror(errno));
1.235 dtucker 1436: if (val64 != 0 && val64 < 16)
1437: fatal("%.200s line %d: RekeyLimit too small",
1438: filename, linenum);
1439: }
1440: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1441: options->rekey_limit = val64;
1.235 dtucker 1442: if (cp != NULL) { /* optional rekey interval present */
1443: if (strcmp(cp, "none") == 0) {
1444: (void)strdelim(&cp); /* discard */
1445: break;
1446: }
1447: intptr = &options->rekey_interval;
1448: goto parse_time;
1449: }
1450: break;
1451:
1.94 markus 1452: case sGatewayPorts:
1.251 millert 1453: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1454: multistate_ptr = multistate_gatewayports;
1455: goto parse_multistate;
1.25 markus 1456:
1.122 markus 1457: case sUseDNS:
1458: intptr = &options->use_dns;
1.94 markus 1459: goto parse_flag;
1.53 markus 1460:
1.94 markus 1461: case sLogFacility:
1.174 dtucker 1462: log_facility_ptr = &options->log_facility;
1.94 markus 1463: arg = strdelim(&cp);
1464: value = log_facility_number(arg);
1.101 markus 1465: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1466: fatal("%.200s line %d: unsupported log facility '%s'",
1467: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1468: if (*log_facility_ptr == -1)
1469: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1470: break;
1.25 markus 1471:
1.94 markus 1472: case sLogLevel:
1.174 dtucker 1473: log_level_ptr = &options->log_level;
1.94 markus 1474: arg = strdelim(&cp);
1475: value = log_level_number(arg);
1.101 markus 1476: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1477: fatal("%.200s line %d: unsupported log level '%s'",
1478: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1479: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1480: *log_level_ptr = (LogLevel) value;
1.94 markus 1481: break;
1482:
1483: case sAllowTcpForwarding:
1484: intptr = &options->allow_tcp_forwarding;
1.233 djm 1485: multistate_ptr = multistate_tcpfwd;
1486: goto parse_multistate;
1.102 provos 1487:
1.251 millert 1488: case sAllowStreamLocalForwarding:
1489: intptr = &options->allow_streamlocal_forwarding;
1490: multistate_ptr = multistate_tcpfwd;
1491: goto parse_multistate;
1492:
1.178 pyr 1493: case sAllowAgentForwarding:
1494: intptr = &options->allow_agent_forwarding;
1495: goto parse_flag;
1496:
1.301 djm 1497: case sDisableForwarding:
1498: intptr = &options->disable_forwarding;
1499: goto parse_flag;
1500:
1.94 markus 1501: case sAllowUsers:
1502: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1503: if (match_user(NULL, NULL, NULL, arg) == -1)
1504: fatal("%s line %d: invalid AllowUsers pattern: "
1505: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1506: if (!*activep)
1507: continue;
1.314 djm 1508: array_append(filename, linenum, "AllowUsers",
1509: &options->allow_users, &options->num_allow_users,
1510: arg);
1.94 markus 1511: }
1512: break;
1.25 markus 1513:
1.94 markus 1514: case sDenyUsers:
1515: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1516: if (match_user(NULL, NULL, NULL, arg) == -1)
1517: fatal("%s line %d: invalid DenyUsers pattern: "
1518: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1519: if (!*activep)
1520: continue;
1.314 djm 1521: array_append(filename, linenum, "DenyUsers",
1522: &options->deny_users, &options->num_deny_users,
1523: arg);
1.94 markus 1524: }
1525: break;
1.25 markus 1526:
1.94 markus 1527: case sAllowGroups:
1528: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1529: if (!*activep)
1530: continue;
1.314 djm 1531: array_append(filename, linenum, "AllowGroups",
1532: &options->allow_groups, &options->num_allow_groups,
1533: arg);
1.94 markus 1534: }
1535: break;
1.33 markus 1536:
1.94 markus 1537: case sDenyGroups:
1538: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1539: if (!*activep)
1540: continue;
1.314 djm 1541: array_append(filename, linenum, "DenyGroups",
1542: &options->deny_groups, &options->num_deny_groups,
1543: arg);
1.94 markus 1544: }
1545: break;
1.66 markus 1546:
1.94 markus 1547: case sCiphers:
1548: arg = strdelim(&cp);
1549: if (!arg || *arg == '\0')
1550: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1551: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1552: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1553: filename, linenum, arg ? arg : "<NONE>");
1554: if (options->ciphers == NULL)
1555: options->ciphers = xstrdup(arg);
1556: break;
1.33 markus 1557:
1.94 markus 1558: case sMacs:
1559: arg = strdelim(&cp);
1560: if (!arg || *arg == '\0')
1561: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1562: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1563: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1564: filename, linenum, arg ? arg : "<NONE>");
1565: if (options->macs == NULL)
1566: options->macs = xstrdup(arg);
1.211 djm 1567: break;
1568:
1569: case sKexAlgorithms:
1570: arg = strdelim(&cp);
1571: if (!arg || *arg == '\0')
1572: fatal("%s line %d: Missing argument.",
1573: filename, linenum);
1.304 djm 1574: if (*arg != '-' &&
1575: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.211 djm 1576: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1577: filename, linenum, arg ? arg : "<NONE>");
1578: if (options->kex_algorithms == NULL)
1579: options->kex_algorithms = xstrdup(arg);
1.94 markus 1580: break;
1.43 jakob 1581:
1.94 markus 1582: case sSubsystem:
1583: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1584: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1585: filename, linenum);
1.94 markus 1586: }
1587: arg = strdelim(&cp);
1588: if (!arg || *arg == '\0')
1589: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1590: filename, linenum);
1.153 dtucker 1591: if (!*activep) {
1592: arg = strdelim(&cp);
1593: break;
1594: }
1.94 markus 1595: for (i = 0; i < options->num_subsystems; i++)
1596: if (strcmp(arg, options->subsystem_name[i]) == 0)
1597: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1598: filename, linenum, arg);
1.94 markus 1599: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1600: arg = strdelim(&cp);
1601: if (!arg || *arg == '\0')
1602: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1603: filename, linenum);
1.94 markus 1604: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1605:
1606: /* Collect arguments (separate to executable) */
1607: p = xstrdup(arg);
1608: len = strlen(p) + 1;
1609: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1610: len += 1 + strlen(arg);
1.264 deraadt 1611: p = xreallocarray(p, 1, len);
1.151 djm 1612: strlcat(p, " ", len);
1613: strlcat(p, arg, len);
1614: }
1615: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1616: options->num_subsystems++;
1617: break;
1.46 markus 1618:
1.94 markus 1619: case sMaxStartups:
1620: arg = strdelim(&cp);
1621: if (!arg || *arg == '\0')
1622: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1623: filename, linenum);
1.94 markus 1624: if ((n = sscanf(arg, "%d:%d:%d",
1625: &options->max_startups_begin,
1626: &options->max_startups_rate,
1627: &options->max_startups)) == 3) {
1628: if (options->max_startups_begin >
1629: options->max_startups ||
1630: options->max_startups_rate > 100 ||
1631: options->max_startups_rate < 1)
1.50 markus 1632: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1633: filename, linenum);
1.94 markus 1634: } else if (n != 1)
1635: fatal("%s line %d: Illegal MaxStartups spec.",
1636: filename, linenum);
1637: else
1638: options->max_startups = options->max_startups_begin;
1639: break;
1.133 dtucker 1640:
1641: case sMaxAuthTries:
1642: intptr = &options->max_authtries;
1643: goto parse_int;
1.94 markus 1644:
1.180 djm 1645: case sMaxSessions:
1646: intptr = &options->max_sessions;
1647: goto parse_int;
1648:
1.94 markus 1649: case sBanner:
1650: charptr = &options->banner;
1651: goto parse_filename;
1.176 djm 1652:
1.94 markus 1653: /*
1654: * These options can contain %X options expanded at
1655: * connect time, so that you can specify paths like:
1656: *
1657: * AuthorizedKeysFile /etc/ssh_keys/%u
1658: */
1659: case sAuthorizedKeysFile:
1.219 djm 1660: if (*activep && options->num_authkeys_files == 0) {
1661: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1662: arg = tilde_expand_filename(arg, getuid());
1663: array_append(filename, linenum,
1664: "AuthorizedKeysFile",
1665: &options->authorized_keys_files,
1666: &options->num_authkeys_files, arg);
1667: free(arg);
1.219 djm 1668: }
1669: }
1670: return 0;
1671:
1.208 djm 1672: case sAuthorizedPrincipalsFile:
1673: charptr = &options->authorized_principals_file;
1.205 djm 1674: arg = strdelim(&cp);
1675: if (!arg || *arg == '\0')
1676: fatal("%s line %d: missing file name.",
1677: filename, linenum);
1678: if (*activep && *charptr == NULL) {
1.206 markus 1679: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1680: /* increase optional counter */
1681: if (intptr != NULL)
1682: *intptr = *intptr + 1;
1683: }
1684: break;
1.94 markus 1685:
1686: case sClientAliveInterval:
1687: intptr = &options->client_alive_interval;
1688: goto parse_time;
1689:
1690: case sClientAliveCountMax:
1691: intptr = &options->client_alive_count_max;
1692: goto parse_int;
1.131 djm 1693:
1694: case sAcceptEnv:
1695: while ((arg = strdelim(&cp)) && *arg != '\0') {
1696: if (strchr(arg, '=') != NULL)
1697: fatal("%s line %d: Invalid environment name.",
1698: filename, linenum);
1.153 dtucker 1699: if (!*activep)
1.227 markus 1700: continue;
1.314 djm 1701: array_append(filename, linenum, "AcceptEnv",
1702: &options->accept_env, &options->num_accept_env,
1703: arg);
1.131 djm 1704: }
1705: break;
1.145 reyk 1706:
1707: case sPermitTunnel:
1708: intptr = &options->permit_tun;
1.146 reyk 1709: arg = strdelim(&cp);
1710: if (!arg || *arg == '\0')
1711: fatal("%s line %d: Missing yes/point-to-point/"
1712: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1713: value = -1;
1714: for (i = 0; tunmode_desc[i].val != -1; i++)
1715: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1716: value = tunmode_desc[i].val;
1717: break;
1718: }
1719: if (value == -1)
1.146 reyk 1720: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1721: "no argument: %s", filename, linenum, arg);
1.268 djm 1722: if (*activep && *intptr == -1)
1.146 reyk 1723: *intptr = value;
1724: break;
1.94 markus 1725:
1.153 dtucker 1726: case sMatch:
1727: if (cmdline)
1728: fatal("Match directive not supported as a command-line "
1729: "option");
1.226 dtucker 1730: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1731: if (value < 0)
1732: fatal("%s line %d: Bad Match condition", filename,
1733: linenum);
1734: *activep = value;
1.156 dtucker 1735: break;
1736:
1737: case sPermitOpen:
1738: arg = strdelim(&cp);
1739: if (!arg || *arg == '\0')
1740: fatal("%s line %d: missing PermitOpen specification",
1741: filename, linenum);
1.313 djm 1742: value = options->num_permitted_opens; /* modified later */
1.310 djm 1743: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.313 djm 1744: if (*activep && value == 0) {
1.224 dtucker 1745: options->num_permitted_opens = 1;
1.310 djm 1746: options->permitted_opens = xcalloc(1,
1747: sizeof(*options->permitted_opens));
1748: options->permitted_opens[0] = xstrdup(arg);
1.311 dtucker 1749: }
1.156 dtucker 1750: break;
1751: }
1.159 dtucker 1752: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.310 djm 1753: arg2 = xstrdup(arg);
1.159 dtucker 1754: p = hpdelim(&arg);
1755: if (p == NULL)
1756: fatal("%s line %d: missing host in PermitOpen",
1757: filename, linenum);
1758: p = cleanhostname(p);
1.223 dtucker 1759: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1760: fatal("%s line %d: bad port number in "
1761: "PermitOpen", filename, linenum);
1.313 djm 1762: if (*activep && value == 0) {
1.314 djm 1763: array_append(filename, linenum,
1764: "PermitOpen",
1765: &options->permitted_opens,
1766: &options->num_permitted_opens, arg2);
1767: }
1768: free(arg2);
1.159 dtucker 1769: }
1.153 dtucker 1770: break;
1771:
1.158 dtucker 1772: case sForceCommand:
1.262 dtucker 1773: if (cp == NULL || *cp == '\0')
1.158 dtucker 1774: fatal("%.200s line %d: Missing argument.", filename,
1775: linenum);
1776: len = strspn(cp, WHITESPACE);
1777: if (*activep && options->adm_forced_command == NULL)
1778: options->adm_forced_command = xstrdup(cp + len);
1779: return 0;
1780:
1.176 djm 1781: case sChrootDirectory:
1782: charptr = &options->chroot_directory;
1.177 djm 1783:
1784: arg = strdelim(&cp);
1785: if (!arg || *arg == '\0')
1786: fatal("%s line %d: missing file name.",
1787: filename, linenum);
1788: if (*activep && *charptr == NULL)
1789: *charptr = xstrdup(arg);
1790: break;
1.176 djm 1791:
1.204 djm 1792: case sTrustedUserCAKeys:
1793: charptr = &options->trusted_user_ca_keys;
1794: goto parse_filename;
1795:
1796: case sRevokedKeys:
1797: charptr = &options->revoked_keys_file;
1798: goto parse_filename;
1799:
1.213 djm 1800: case sIPQoS:
1801: arg = strdelim(&cp);
1802: if ((value = parse_ipqos(arg)) == -1)
1803: fatal("%s line %d: Bad IPQoS value: %s",
1804: filename, linenum, arg);
1805: arg = strdelim(&cp);
1806: if (arg == NULL)
1807: value2 = value;
1808: else if ((value2 = parse_ipqos(arg)) == -1)
1809: fatal("%s line %d: Bad IPQoS value: %s",
1810: filename, linenum, arg);
1811: if (*activep) {
1812: options->ip_qos_interactive = value;
1813: options->ip_qos_bulk = value2;
1814: }
1815: break;
1816:
1.225 djm 1817: case sVersionAddendum:
1.262 dtucker 1818: if (cp == NULL || *cp == '\0')
1.225 djm 1819: fatal("%.200s line %d: Missing argument.", filename,
1820: linenum);
1821: len = strspn(cp, WHITESPACE);
1822: if (*activep && options->version_addendum == NULL) {
1823: if (strcasecmp(cp + len, "none") == 0)
1824: options->version_addendum = xstrdup("");
1825: else if (strchr(cp + len, '\r') != NULL)
1826: fatal("%.200s line %d: Invalid argument",
1827: filename, linenum);
1828: else
1829: options->version_addendum = xstrdup(cp + len);
1830: }
1831: return 0;
1832:
1.231 djm 1833: case sAuthorizedKeysCommand:
1.255 jsg 1834: if (cp == NULL)
1835: fatal("%.200s line %d: Missing argument.", filename,
1836: linenum);
1.231 djm 1837: len = strspn(cp, WHITESPACE);
1838: if (*activep && options->authorized_keys_command == NULL) {
1839: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1840: fatal("%.200s line %d: AuthorizedKeysCommand "
1841: "must be an absolute path",
1842: filename, linenum);
1843: options->authorized_keys_command = xstrdup(cp + len);
1844: }
1845: return 0;
1846:
1847: case sAuthorizedKeysCommandUser:
1848: charptr = &options->authorized_keys_command_user;
1849:
1850: arg = strdelim(&cp);
1.255 jsg 1851: if (!arg || *arg == '\0')
1852: fatal("%s line %d: missing AuthorizedKeysCommandUser "
1853: "argument.", filename, linenum);
1.231 djm 1854: if (*activep && *charptr == NULL)
1855: *charptr = xstrdup(arg);
1856: break;
1857:
1.270 djm 1858: case sAuthorizedPrincipalsCommand:
1859: if (cp == NULL)
1860: fatal("%.200s line %d: Missing argument.", filename,
1861: linenum);
1862: len = strspn(cp, WHITESPACE);
1863: if (*activep &&
1864: options->authorized_principals_command == NULL) {
1865: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1866: fatal("%.200s line %d: "
1867: "AuthorizedPrincipalsCommand must be "
1868: "an absolute path", filename, linenum);
1869: options->authorized_principals_command =
1870: xstrdup(cp + len);
1871: }
1872: return 0;
1873:
1874: case sAuthorizedPrincipalsCommandUser:
1875: charptr = &options->authorized_principals_command_user;
1876:
1877: arg = strdelim(&cp);
1878: if (!arg || *arg == '\0')
1879: fatal("%s line %d: missing "
1880: "AuthorizedPrincipalsCommandUser argument.",
1881: filename, linenum);
1882: if (*activep && *charptr == NULL)
1883: *charptr = xstrdup(arg);
1884: break;
1885:
1.232 djm 1886: case sAuthenticationMethods:
1.268 djm 1887: if (options->num_auth_methods == 0) {
1.291 djm 1888: value = 0; /* seen "any" pseudo-method */
1.292 djm 1889: value2 = 0; /* sucessfully parsed any method */
1.232 djm 1890: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 1891: if (strcmp(arg, "any") == 0) {
1892: if (options->num_auth_methods > 0) {
1893: fatal("%s line %d: \"any\" "
1894: "must appear alone in "
1895: "AuthenticationMethods",
1896: filename, linenum);
1897: }
1898: value = 1;
1899: } else if (value) {
1900: fatal("%s line %d: \"any\" must appear "
1901: "alone in AuthenticationMethods",
1902: filename, linenum);
1903: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 1904: fatal("%s line %d: invalid "
1905: "authentication method list.",
1906: filename, linenum);
1.291 djm 1907: }
1.292 djm 1908: value2 = 1;
1.268 djm 1909: if (!*activep)
1910: continue;
1.314 djm 1911: array_append(filename, linenum,
1912: "AuthenticationMethods",
1913: &options->auth_methods,
1914: &options->num_auth_methods, arg);
1.232 djm 1915: }
1.292 djm 1916: if (value2 == 0) {
1.291 djm 1917: fatal("%s line %d: no AuthenticationMethods "
1918: "specified", filename, linenum);
1919: }
1.232 djm 1920: }
1921: return 0;
1922:
1.251 millert 1923: case sStreamLocalBindMask:
1924: arg = strdelim(&cp);
1925: if (!arg || *arg == '\0')
1.268 djm 1926: fatal("%s line %d: missing StreamLocalBindMask "
1927: "argument.", filename, linenum);
1.251 millert 1928: /* Parse mode in octal format */
1929: value = strtol(arg, &p, 8);
1930: if (arg == p || value < 0 || value > 0777)
1931: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 1932: if (*activep)
1933: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 1934: break;
1935:
1936: case sStreamLocalBindUnlink:
1937: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1938: goto parse_flag;
1939:
1.256 djm 1940: case sFingerprintHash:
1941: arg = strdelim(&cp);
1942: if (!arg || *arg == '\0')
1943: fatal("%.200s line %d: Missing argument.",
1944: filename, linenum);
1945: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1946: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1947: filename, linenum, arg);
1948: if (*activep)
1949: options->fingerprint_hash = value;
1950: break;
1951:
1.309 djm 1952: case sExposeAuthInfo:
1953: intptr = &options->expose_userauth_info;
1954: goto parse_flag;
1955:
1.316 djm 1956: case sRDomain:
1957: charptr = &options->routing_domain;
1958: arg = strdelim(&cp);
1959: if (!arg || *arg == '\0')
1960: fatal("%.200s line %d: Missing argument.",
1961: filename, linenum);
1962: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
1963: !valid_rdomain(arg))
1964: fatal("%s line %d: bad routing domain",
1965: filename, linenum);
1966: if (*activep && *charptr == NULL)
1967: *charptr = xstrdup(arg);
1.321 dtucker 1968: break;
1.316 djm 1969:
1.94 markus 1970: case sDeprecated:
1.295 djm 1971: case sIgnore:
1.121 jakob 1972: case sUnsupported:
1.295 djm 1973: do_log2(opcode == sIgnore ?
1974: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
1975: "%s line %d: %s option %s", filename, linenum,
1976: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 1977: while (arg)
1978: arg = strdelim(&cp);
1979: break;
1980:
1981: default:
1982: fatal("%s line %d: Missing handler for opcode %s (%d)",
1983: filename, linenum, arg, opcode);
1984: }
1985: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1986: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1987: filename, linenum, arg);
1988: return 0;
1989: }
1990:
1991: /* Reads the server configuration file. */
1.25 markus 1992:
1.94 markus 1993: void
1.134 djm 1994: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1995: {
1.229 dtucker 1996: char line[4096], *cp;
1.94 markus 1997: FILE *f;
1.229 dtucker 1998: int lineno = 0;
1.81 stevesk 1999:
1.134 djm 2000: debug2("%s: filename %s", __func__, filename);
2001: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2002: perror(filename);
2003: exit(1);
2004: }
1.134 djm 2005: buffer_clear(conf);
2006: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 2007: lineno++;
2008: if (strlen(line) == sizeof(line) - 1)
2009: fatal("%s line %d too long", filename, lineno);
1.134 djm 2010: /*
2011: * Trim out comments and strip whitespace
1.135 deraadt 2012: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2013: * line numbers later for error messages
2014: */
2015: if ((cp = strchr(line, '#')) != NULL)
2016: memcpy(cp, "\n", 2);
2017: cp = line + strspn(line, " \t\r");
2018:
2019: buffer_append(conf, cp, strlen(cp));
2020: }
2021: buffer_append(conf, "\0", 1);
2022: fclose(f);
2023: debug2("%s: done config len = %d", __func__, buffer_len(conf));
2024: }
2025:
2026: void
1.226 dtucker 2027: parse_server_match_config(ServerOptions *options,
2028: struct connection_info *connectinfo)
1.153 dtucker 2029: {
2030: ServerOptions mo;
2031:
2032: initialize_server_options(&mo);
1.226 dtucker 2033: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 2034: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2035: }
2036:
1.226 dtucker 2037: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2038: {
2039: char *p;
2040:
2041: while ((p = strsep(&spec, ",")) && *p != '\0') {
2042: if (strncmp(p, "addr=", 5) == 0) {
2043: ci->address = xstrdup(p + 5);
2044: } else if (strncmp(p, "host=", 5) == 0) {
2045: ci->host = xstrdup(p + 5);
2046: } else if (strncmp(p, "user=", 5) == 0) {
2047: ci->user = xstrdup(p + 5);
2048: } else if (strncmp(p, "laddr=", 6) == 0) {
2049: ci->laddress = xstrdup(p + 6);
1.317 djm 2050: } else if (strncmp(p, "rdomain=", 8) == 0) {
2051: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2052: } else if (strncmp(p, "lport=", 6) == 0) {
2053: ci->lport = a2port(p + 6);
2054: if (ci->lport == -1) {
2055: fprintf(stderr, "Invalid port '%s' in test mode"
2056: " specification %s\n", p+6, p);
2057: return -1;
2058: }
2059: } else {
2060: fprintf(stderr, "Invalid test mode specification %s\n",
2061: p);
2062: return -1;
2063: }
2064: }
2065: return 0;
2066: }
2067:
1.168 dtucker 2068: /*
2069: * Copy any supported values that are set.
2070: *
1.195 jj 2071: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2072: * array values that are not used pre-authentication, because any that we
2073: * do use must be explictly sent in mm_getpwnamallow().
2074: */
1.153 dtucker 2075: void
1.168 dtucker 2076: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2077: {
1.247 djm 2078: #define M_CP_INTOPT(n) do {\
2079: if (src->n != -1) \
2080: dst->n = src->n; \
2081: } while (0)
2082:
1.168 dtucker 2083: M_CP_INTOPT(password_authentication);
2084: M_CP_INTOPT(gss_authentication);
2085: M_CP_INTOPT(pubkey_authentication);
2086: M_CP_INTOPT(kerberos_authentication);
2087: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2088: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2089: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2090: M_CP_INTOPT(permit_root_login);
1.188 djm 2091: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 2092:
2093: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2094: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2095: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2096: M_CP_INTOPT(disable_forwarding);
1.309 djm 2097: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2098: M_CP_INTOPT(permit_tun);
1.251 millert 2099: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2100: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2101: M_CP_INTOPT(x11_display_offset);
2102: M_CP_INTOPT(x11_forwarding);
2103: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2104: M_CP_INTOPT(permit_tty);
1.250 djm 2105: M_CP_INTOPT(permit_user_rc);
1.180 djm 2106: M_CP_INTOPT(max_sessions);
1.184 dtucker 2107: M_CP_INTOPT(max_authtries);
1.300 markus 2108: M_CP_INTOPT(client_alive_count_max);
2109: M_CP_INTOPT(client_alive_interval);
1.213 djm 2110: M_CP_INTOPT(ip_qos_interactive);
2111: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2112: M_CP_INTOPT(rekey_limit);
2113: M_CP_INTOPT(rekey_interval);
1.308 djm 2114: M_CP_INTOPT(log_level);
1.289 djm 2115:
2116: /*
2117: * The bind_mask is a mode_t that may be unsigned, so we can't use
2118: * M_CP_INTOPT - it does a signed comparison that causes compiler
2119: * warnings.
2120: */
1.290 dtucker 2121: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2122: dst->fwd_opts.streamlocal_bind_mask =
2123: src->fwd_opts.streamlocal_bind_mask;
2124: }
1.247 djm 2125:
2126: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2127: #define M_CP_STROPT(n) do {\
2128: if (src->n != NULL && dst->n != src->n) { \
2129: free(dst->n); \
2130: dst->n = src->n; \
2131: } \
2132: } while(0)
1.314 djm 2133: #define M_CP_STRARRAYOPT(s, num_s) do {\
2134: u_int i; \
2135: if (src->num_s != 0) { \
2136: for (i = 0; i < dst->num_s; i++) \
2137: free(dst->s[i]); \
2138: free(dst->s); \
2139: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2140: for (i = 0; i < src->num_s; i++) \
2141: dst->s[i] = xstrdup(src->s[i]); \
2142: dst->num_s = src->num_s; \
1.312 djm 2143: } \
2144: } while(0)
1.168 dtucker 2145:
1.218 djm 2146: /* See comment in servconf.h */
2147: COPY_MATCH_STRING_OPTS();
1.282 djm 2148:
2149: /* Arguments that accept '+...' need to be expanded */
2150: assemble_algorithms(dst);
1.216 djm 2151:
1.217 dtucker 2152: /*
2153: * The only things that should be below this point are string options
2154: * which are only used after authentication.
2155: */
1.168 dtucker 2156: if (preauth)
2157: return;
1.219 djm 2158:
1.283 djm 2159: /* These options may be "none" to clear a global setting */
1.168 dtucker 2160: M_CP_STROPT(adm_forced_command);
1.283 djm 2161: if (option_clear_or_none(dst->adm_forced_command)) {
2162: free(dst->adm_forced_command);
2163: dst->adm_forced_command = NULL;
2164: }
1.176 djm 2165: M_CP_STROPT(chroot_directory);
1.283 djm 2166: if (option_clear_or_none(dst->chroot_directory)) {
2167: free(dst->chroot_directory);
2168: dst->chroot_directory = NULL;
2169: }
1.153 dtucker 2170: }
1.168 dtucker 2171:
2172: #undef M_CP_INTOPT
2173: #undef M_CP_STROPT
1.219 djm 2174: #undef M_CP_STRARRAYOPT
1.153 dtucker 2175:
2176: void
2177: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 2178: struct connection_info *connectinfo)
1.134 djm 2179: {
1.153 dtucker 2180: int active, linenum, bad_options = 0;
1.136 dtucker 2181: char *cp, *obuf, *cbuf;
1.134 djm 2182:
2183: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
2184:
1.287 djm 2185: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2186: fatal("%s: sshbuf_dup_string failed", __func__);
1.226 dtucker 2187: active = connectinfo ? 0 : 1;
1.137 dtucker 2188: linenum = 1;
1.140 deraadt 2189: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 2190: if (process_server_config_line(options, cp, filename,
1.226 dtucker 2191: linenum++, &active, connectinfo) != 0)
1.94 markus 2192: bad_options++;
1.1 deraadt 2193: }
1.239 djm 2194: free(obuf);
1.78 stevesk 2195: if (bad_options > 0)
2196: fatal("%s: terminating, %d bad configuration options",
2197: filename, bad_options);
1.266 dtucker 2198: process_queued_listen_addrs(options);
1.182 dtucker 2199: }
2200:
2201: static const char *
1.221 djm 2202: fmt_multistate_int(int val, const struct multistate *m)
2203: {
2204: u_int i;
2205:
2206: for (i = 0; m[i].key != NULL; i++) {
2207: if (m[i].value == val)
2208: return m[i].key;
2209: }
2210: return "UNKNOWN";
2211: }
2212:
2213: static const char *
1.182 dtucker 2214: fmt_intarg(ServerOpCodes code, int val)
2215: {
1.221 djm 2216: if (val == -1)
2217: return "unset";
2218: switch (code) {
2219: case sAddressFamily:
2220: return fmt_multistate_int(val, multistate_addressfamily);
2221: case sPermitRootLogin:
2222: return fmt_multistate_int(val, multistate_permitrootlogin);
2223: case sGatewayPorts:
2224: return fmt_multistate_int(val, multistate_gatewayports);
2225: case sCompression:
2226: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2227: case sAllowTcpForwarding:
2228: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2229: case sAllowStreamLocalForwarding:
2230: return fmt_multistate_int(val, multistate_tcpfwd);
1.256 djm 2231: case sFingerprintHash:
2232: return ssh_digest_alg_name(val);
1.221 djm 2233: default:
2234: switch (val) {
2235: case 0:
2236: return "no";
2237: case 1:
2238: return "yes";
2239: default:
2240: return "UNKNOWN";
2241: }
1.182 dtucker 2242: }
2243: }
2244:
2245: static const char *
2246: lookup_opcode_name(ServerOpCodes code)
2247: {
2248: u_int i;
2249:
2250: for (i = 0; keywords[i].name != NULL; i++)
2251: if (keywords[i].opcode == code)
2252: return(keywords[i].name);
2253: return "UNKNOWN";
2254: }
2255:
2256: static void
2257: dump_cfg_int(ServerOpCodes code, int val)
2258: {
2259: printf("%s %d\n", lookup_opcode_name(code), val);
2260: }
2261:
2262: static void
1.263 dtucker 2263: dump_cfg_oct(ServerOpCodes code, int val)
2264: {
2265: printf("%s 0%o\n", lookup_opcode_name(code), val);
2266: }
2267:
2268: static void
1.182 dtucker 2269: dump_cfg_fmtint(ServerOpCodes code, int val)
2270: {
2271: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2272: }
2273:
2274: static void
2275: dump_cfg_string(ServerOpCodes code, const char *val)
2276: {
1.257 djm 2277: printf("%s %s\n", lookup_opcode_name(code),
2278: val == NULL ? "none" : val);
1.182 dtucker 2279: }
2280:
2281: static void
2282: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2283: {
2284: u_int i;
2285:
2286: for (i = 0; i < count; i++)
1.219 djm 2287: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2288: }
2289:
2290: static void
2291: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2292: {
2293: u_int i;
2294:
1.291 djm 2295: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2296: return;
1.219 djm 2297: printf("%s", lookup_opcode_name(code));
2298: for (i = 0; i < count; i++)
2299: printf(" %s", vals[i]);
1.291 djm 2300: if (code == sAuthenticationMethods && count == 0)
2301: printf(" any");
1.219 djm 2302: printf("\n");
1.182 dtucker 2303: }
2304:
1.315 djm 2305: static char *
2306: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2307: {
1.315 djm 2308: int r;
1.182 dtucker 2309: struct addrinfo *ai;
1.315 djm 2310: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2311: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2312:
1.263 dtucker 2313: /*
2314: * ListenAddress must be after Port. add_one_listen_addr pushes
2315: * addresses onto a stack, so to maintain ordering we need to
2316: * print these in reverse order.
2317: */
1.315 djm 2318: for (ai = la->addrs; ai; ai = ai->ai_next) {
2319: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2320: sizeof(addr), port, sizeof(port),
2321: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2322: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2323: continue;
2324: }
2325: laddr2 = laddr1;
2326: if (ai->ai_family == AF_INET6) {
2327: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2328: addr, port,
2329: la->rdomain == NULL ? "" : " rdomain ",
2330: la->rdomain == NULL ? "" : la->rdomain,
2331: laddr2);
1.182 dtucker 2332: } else {
1.315 djm 2333: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2334: addr, port,
2335: la->rdomain == NULL ? "" : " rdomain ",
2336: la->rdomain == NULL ? "" : la->rdomain,
2337: laddr2);
1.182 dtucker 2338: }
1.315 djm 2339: free(laddr2);
2340: }
2341: return laddr1;
2342: }
2343:
2344: void
2345: dump_config(ServerOptions *o)
2346: {
2347: char *s;
2348: u_int i;
2349:
2350: /* these are usually at the top of the config */
2351: for (i = 0; i < o->num_ports; i++)
2352: printf("port %d\n", o->ports[i]);
2353: dump_cfg_fmtint(sAddressFamily, o->address_family);
2354:
2355: for (i = 0; i < o->num_listen_addrs; i++) {
2356: s = format_listen_addrs(&o->listen_addrs[i]);
2357: printf("%s", s);
2358: free(s);
1.182 dtucker 2359: }
2360:
2361: /* integer arguments */
2362: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2363: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2364: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2365: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2366: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2367: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2368: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2369:
2370: /* formatted integer arguments */
2371: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2372: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2373: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2374: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2375: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2376: o->hostbased_uses_name_from_packet_only);
2377: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2378: #ifdef KRB5
1.182 dtucker 2379: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2380: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2381: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2382: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2383: #endif
2384: #ifdef GSSAPI
1.182 dtucker 2385: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2386: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2387: #endif
1.182 dtucker 2388: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2389: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2390: o->kbd_interactive_authentication);
2391: dump_cfg_fmtint(sChallengeResponseAuthentication,
2392: o->challenge_response_authentication);
2393: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2394: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2395: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2396: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2397: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2398: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2399: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2400: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2401: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2402: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2403: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2404: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2405: dump_cfg_fmtint(sUseDNS, o->use_dns);
2406: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2407: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2408: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2409: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2410: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2411: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2412: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2413:
2414: /* string arguments */
2415: dump_cfg_string(sPidFile, o->pid_file);
2416: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.252 djm 2417: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
2418: dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
1.182 dtucker 2419: dump_cfg_string(sBanner, o->banner);
2420: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2421: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2422: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2423: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 2424: dump_cfg_string(sAuthorizedPrincipalsFile,
2425: o->authorized_principals_file);
1.261 dtucker 2426: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2427: ? "none" : o->version_addendum);
1.231 djm 2428: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2429: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2430: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2431: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2432: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.252 djm 2433: dump_cfg_string(sKexAlgorithms,
1.253 djm 2434: o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
1.258 djm 2435: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
2436: o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
1.276 markus 2437: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
2438: o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG);
1.258 djm 2439: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ?
2440: o->pubkey_key_types : KEX_DEFAULT_PK_ALG);
1.316 djm 2441: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2442:
2443: /* string arguments requiring a lookup */
2444: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2445: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2446:
2447: /* string array arguments */
1.219 djm 2448: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2449: o->authorized_keys_files);
1.182 dtucker 2450: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2451: o->host_key_files);
1.261 dtucker 2452: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2453: o->host_cert_files);
1.182 dtucker 2454: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2455: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2456: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2457: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2458: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2459: dump_cfg_strarray_oneline(sAuthenticationMethods,
2460: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2461:
2462: /* other arguments */
2463: for (i = 0; i < o->num_subsystems; i++)
2464: printf("subsystem %s %s\n", o->subsystem_name[i],
2465: o->subsystem_args[i]);
2466:
2467: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2468: o->max_startups_rate, o->max_startups);
2469:
1.318 djm 2470: s = NULL;
2471: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2472: if (tunmode_desc[i].val == o->permit_tun) {
2473: s = tunmode_desc[i].text;
2474: break;
2475: }
1.318 djm 2476: }
1.182 dtucker 2477: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2478:
1.214 stevesk 2479: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2480: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2481:
1.284 dtucker 2482: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2483: o->rekey_interval);
1.182 dtucker 2484:
1.310 djm 2485: printf("permitopen");
2486: if (o->num_permitted_opens == 0)
2487: printf(" any");
2488: else {
2489: for (i = 0; i < o->num_permitted_opens; i++)
2490: printf(" %s", o->permitted_opens[i]);
2491: }
2492: printf("\n");
1.1 deraadt 2493: }
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