Annotation of src/usr.bin/ssh/servconf.c, Revision 1.327
1.226 dtucker 1:
1.327 ! job 2: /* $OpenBSD: servconf.c,v 1.326 2018/03/01 20:32:16 markus 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);
1.326 markus 235: #ifdef WITH_XMSS
1.325 markus 236: servconf_add_hostkey("[default]", 0, options,
237: _PATH_HOST_XMSS_KEY_FILE);
1.326 markus 238: #endif /* WITH_XMSS */
1.54 markus 239: }
1.203 djm 240: /* No certificates by default */
1.29 markus 241: if (options->num_ports == 0)
242: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 243: if (options->address_family == -1)
244: options->address_family = AF_UNSPEC;
1.29 markus 245: if (options->listen_addrs == NULL)
1.315 djm 246: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 247: if (options->pid_file == NULL)
1.257 djm 248: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 249: if (options->login_grace_time == -1)
1.115 stevesk 250: options->login_grace_time = 120;
1.67 markus 251: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 252: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 253: if (options->ignore_rhosts == -1)
1.30 markus 254: options->ignore_rhosts = 1;
1.25 markus 255: if (options->ignore_user_known_hosts == -1)
256: options->ignore_user_known_hosts = 0;
257: if (options->print_motd == -1)
258: options->print_motd = 1;
1.72 stevesk 259: if (options->print_lastlog == -1)
260: options->print_lastlog = 1;
1.25 markus 261: if (options->x11_forwarding == -1)
1.30 markus 262: options->x11_forwarding = 0;
1.25 markus 263: if (options->x11_display_offset == -1)
1.30 markus 264: options->x11_display_offset = 10;
1.99 stevesk 265: if (options->x11_use_localhost == -1)
266: options->x11_use_localhost = 1;
1.42 markus 267: if (options->xauth_location == NULL)
1.257 djm 268: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 269: if (options->permit_tty == -1)
270: options->permit_tty = 1;
1.250 djm 271: if (options->permit_user_rc == -1)
272: options->permit_user_rc = 1;
1.25 markus 273: if (options->strict_modes == -1)
274: options->strict_modes = 1;
1.129 markus 275: if (options->tcp_keep_alive == -1)
276: options->tcp_keep_alive = 1;
1.101 markus 277: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 278: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 279: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 280: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 281: if (options->hostbased_authentication == -1)
282: options->hostbased_authentication = 0;
283: if (options->hostbased_uses_name_from_packet_only == -1)
284: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 285: if (options->pubkey_authentication == -1)
286: options->pubkey_authentication = 1;
1.25 markus 287: if (options->kerberos_authentication == -1)
1.107 markus 288: options->kerberos_authentication = 0;
1.25 markus 289: if (options->kerberos_or_local_passwd == -1)
290: options->kerberos_or_local_passwd = 1;
291: if (options->kerberos_ticket_cleanup == -1)
292: options->kerberos_ticket_cleanup = 1;
1.130 jakob 293: if (options->kerberos_get_afs_token == -1)
294: options->kerberos_get_afs_token = 0;
1.125 markus 295: if (options->gss_authentication == -1)
296: options->gss_authentication = 0;
297: if (options->gss_cleanup_creds == -1)
298: options->gss_cleanup_creds = 1;
1.271 djm 299: if (options->gss_strict_acceptor == -1)
1.302 djm 300: options->gss_strict_acceptor = 1;
1.25 markus 301: if (options->password_authentication == -1)
302: options->password_authentication = 1;
1.52 markus 303: if (options->kbd_interactive_authentication == -1)
304: options->kbd_interactive_authentication = 0;
1.80 markus 305: if (options->challenge_response_authentication == -1)
306: options->challenge_response_authentication = 1;
1.25 markus 307: if (options->permit_empty_passwd == -1)
1.30 markus 308: options->permit_empty_passwd = 0;
1.113 markus 309: if (options->permit_user_env == -1)
310: options->permit_user_env = 0;
1.111 markus 311: if (options->compression == -1)
1.143 markus 312: options->compression = COMP_DELAYED;
1.235 dtucker 313: if (options->rekey_limit == -1)
314: options->rekey_limit = 0;
315: if (options->rekey_interval == -1)
316: options->rekey_interval = 0;
1.53 markus 317: if (options->allow_tcp_forwarding == -1)
1.233 djm 318: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 319: if (options->allow_streamlocal_forwarding == -1)
320: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 321: if (options->allow_agent_forwarding == -1)
322: options->allow_agent_forwarding = 1;
1.251 millert 323: if (options->fwd_opts.gateway_ports == -1)
324: options->fwd_opts.gateway_ports = 0;
1.46 markus 325: if (options->max_startups == -1)
1.234 dtucker 326: options->max_startups = 100;
1.50 markus 327: if (options->max_startups_rate == -1)
1.234 dtucker 328: options->max_startups_rate = 30; /* 30% */
1.50 markus 329: if (options->max_startups_begin == -1)
1.234 dtucker 330: options->max_startups_begin = 10;
1.133 dtucker 331: if (options->max_authtries == -1)
332: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 333: if (options->max_sessions == -1)
334: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 335: if (options->use_dns == -1)
1.260 deraadt 336: options->use_dns = 0;
1.77 beck 337: if (options->client_alive_interval == -1)
1.95 deraadt 338: options->client_alive_interval = 0;
1.77 beck 339: if (options->client_alive_count_max == -1)
340: options->client_alive_count_max = 3;
1.219 djm 341: if (options->num_authkeys_files == 0) {
1.314 djm 342: array_append("[default]", 0, "AuthorizedKeysFiles",
343: &options->authorized_keys_files,
344: &options->num_authkeys_files,
345: _PATH_SSH_USER_PERMITTED_KEYS);
346: array_append("[default]", 0, "AuthorizedKeysFiles",
347: &options->authorized_keys_files,
348: &options->num_authkeys_files,
349: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 350: }
1.145 reyk 351: if (options->permit_tun == -1)
1.146 reyk 352: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 353: if (options->ip_qos_interactive == -1)
1.327 ! job 354: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 355: if (options->ip_qos_bulk == -1)
1.327 ! job 356: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 357: if (options->version_addendum == NULL)
358: options->version_addendum = xstrdup("");
1.251 millert 359: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
360: options->fwd_opts.streamlocal_bind_mask = 0177;
361: if (options->fwd_opts.streamlocal_bind_unlink == -1)
362: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 363: if (options->fingerprint_hash == -1)
364: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 365: if (options->disable_forwarding == -1)
366: options->disable_forwarding = 0;
1.309 djm 367: if (options->expose_userauth_info == -1)
368: options->expose_userauth_info = 0;
1.277 djm 369:
1.282 djm 370: assemble_algorithms(options);
1.277 djm 371:
1.285 djm 372: /* Turn privilege separation and sandboxing on by default */
1.102 provos 373: if (use_privsep == -1)
1.285 djm 374: use_privsep = PRIVSEP_ON;
1.257 djm 375:
376: #define CLEAR_ON_NONE(v) \
377: do { \
378: if (option_clear_or_none(v)) { \
379: free(v); \
380: v = NULL; \
381: } \
382: } while(0)
383: CLEAR_ON_NONE(options->pid_file);
384: CLEAR_ON_NONE(options->xauth_location);
385: CLEAR_ON_NONE(options->banner);
386: CLEAR_ON_NONE(options->trusted_user_ca_keys);
387: CLEAR_ON_NONE(options->revoked_keys_file);
1.267 djm 388: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 389: CLEAR_ON_NONE(options->adm_forced_command);
390: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 391: CLEAR_ON_NONE(options->routing_domain);
1.257 djm 392: for (i = 0; i < options->num_host_key_files; i++)
393: CLEAR_ON_NONE(options->host_key_files[i]);
394: for (i = 0; i < options->num_host_cert_files; i++)
395: CLEAR_ON_NONE(options->host_cert_files[i]);
396: #undef CLEAR_ON_NONE
1.291 djm 397:
398: /* Similar handling for AuthenticationMethods=any */
399: if (options->num_auth_methods == 1 &&
400: strcmp(options->auth_methods[0], "any") == 0) {
401: free(options->auth_methods[0]);
402: options->auth_methods[0] = NULL;
403: options->num_auth_methods = 0;
404: }
405:
1.1 deraadt 406: }
407:
408: /* Keyword tokens. */
1.25 markus 409: typedef enum {
410: sBadOption, /* == unknown option */
1.293 naddy 411: sPort, sHostKeyFile, sLoginGraceTime,
412: sPermitRootLogin, sLogFacility, sLogLevel,
1.25 markus 413: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 414: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 415: sPasswordAuthentication, sKbdInteractiveAuthentication,
416: sListenAddress, sAddressFamily,
1.72 stevesk 417: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 418: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 419: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 420: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 421: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 422: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 423: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
424: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 425: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 426: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 427: sHostKeyAlgorithms,
1.258 djm 428: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 429: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
430: sAcceptEnv, sPermitTunnel,
1.176 djm 431: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 432: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.249 djm 433: sHostCertificate,
1.208 djm 434: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 435: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.225 djm 436: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 437: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 438: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 439: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 440: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.316 djm 441: sExposeAuthInfo, sRDomain,
1.295 djm 442: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 443: } ServerOpCodes;
444:
1.153 dtucker 445: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
446: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
447: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
448:
1.1 deraadt 449: /* Textual representation of the tokens. */
1.25 markus 450: static struct {
451: const char *name;
452: ServerOpCodes opcode;
1.153 dtucker 453: u_int flags;
1.25 markus 454: } keywords[] = {
1.153 dtucker 455: { "port", sPort, SSHCFG_GLOBAL },
456: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
457: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 458: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 459: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 460: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 461: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 462: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 463: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 464: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 465: { "loglevel", sLogLevel, SSHCFG_ALL },
1.153 dtucker 466: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 467: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 468: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 469: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 470: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 471: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 472: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 473: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 474: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.153 dtucker 475: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 476: #ifdef KRB5
1.168 dtucker 477: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 478: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
479: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
480: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 481: #else
1.168 dtucker 482: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 483: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
484: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
485: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 486: #endif
1.153 dtucker 487: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
488: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 489: #ifdef GSSAPI
1.168 dtucker 490: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 491: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 492: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 493: #else
1.168 dtucker 494: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 495: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 496: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 497: #endif
1.168 dtucker 498: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
499: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 500: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 501: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
502: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
503: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
504: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
505: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
506: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
507: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
508: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 509: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
510: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
511: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 512: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
513: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 514: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 515: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 516: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 517: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 518: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 519: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
520: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
521: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 522: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 523: { "allowusers", sAllowUsers, SSHCFG_ALL },
524: { "denyusers", sDenyUsers, SSHCFG_ALL },
525: { "allowgroups", sAllowGroups, SSHCFG_ALL },
526: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 527: { "ciphers", sCiphers, SSHCFG_GLOBAL },
528: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 529: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 530: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
531: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
532: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 533: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 534: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 535: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 536: { "usedns", sUseDNS, SSHCFG_GLOBAL },
537: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
538: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 539: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
540: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 541: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 542: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 543: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 544: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 545: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 546: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 547: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 548: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 549: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 550: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 551: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 552: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 553: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
554: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 555: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 556: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 557: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 558: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
559: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 560: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
561: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 562: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 563: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 564: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
565: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
566: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 567: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 568: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 569: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 570: { "rdomain", sRDomain, SSHCFG_ALL },
1.153 dtucker 571: { NULL, sBadOption, 0 }
1.1 deraadt 572: };
573:
1.182 dtucker 574: static struct {
575: int val;
576: char *text;
577: } tunmode_desc[] = {
578: { SSH_TUNMODE_NO, "no" },
579: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
580: { SSH_TUNMODE_ETHERNET, "ethernet" },
581: { SSH_TUNMODE_YES, "yes" },
582: { -1, NULL }
583: };
584:
1.27 markus 585: /*
1.73 stevesk 586: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 587: */
1.1 deraadt 588:
1.34 markus 589: static ServerOpCodes
1.25 markus 590: parse_token(const char *cp, const char *filename,
1.153 dtucker 591: int linenum, u_int *flags)
1.1 deraadt 592: {
1.55 markus 593: u_int i;
1.1 deraadt 594:
1.25 markus 595: for (i = 0; keywords[i].name; i++)
1.153 dtucker 596: if (strcasecmp(cp, keywords[i].name) == 0) {
597: *flags = keywords[i].flags;
1.25 markus 598: return keywords[i].opcode;
1.153 dtucker 599: }
1.25 markus 600:
1.78 stevesk 601: error("%s: line %d: Bad configuration option: %s",
602: filename, linenum, cp);
1.25 markus 603: return sBadOption;
1.1 deraadt 604: }
605:
1.202 djm 606: char *
607: derelativise_path(const char *path)
608: {
1.259 deraadt 609: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 610:
1.257 djm 611: if (strcasecmp(path, "none") == 0)
612: return xstrdup("none");
1.202 djm 613: expanded = tilde_expand_filename(path, getuid());
614: if (*expanded == '/')
615: return expanded;
1.207 djm 616: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 617: fatal("%s: getcwd: %s", __func__, strerror(errno));
618: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 619: free(expanded);
1.202 djm 620: return ret;
621: }
622:
1.84 itojun 623: static void
1.315 djm 624: add_listen_addr(ServerOptions *options, const char *addr,
625: const char *rdomain, int port)
1.74 stevesk 626: {
1.142 djm 627: u_int i;
1.74 stevesk 628:
1.315 djm 629: if (port > 0)
630: add_one_listen_addr(options, addr, rdomain, port);
631: else {
632: for (i = 0; i < options->num_ports; i++) {
633: add_one_listen_addr(options, addr, rdomain,
634: options->ports[i]);
635: }
636: }
1.74 stevesk 637: }
638:
1.84 itojun 639: static void
1.315 djm 640: add_one_listen_addr(ServerOptions *options, const char *addr,
641: const char *rdomain, int port)
1.29 markus 642: {
643: struct addrinfo hints, *ai, *aitop;
644: char strport[NI_MAXSERV];
645: int gaierr;
1.315 djm 646: u_int i;
647:
648: /* Find listen_addrs entry for this rdomain */
649: for (i = 0; i < options->num_listen_addrs; i++) {
650: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
651: break;
652: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
653: continue;
654: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
655: break;
656: }
657: if (i >= options->num_listen_addrs) {
658: /* No entry for this rdomain; allocate one */
659: if (i >= INT_MAX)
660: fatal("%s: too many listen addresses", __func__);
661: options->listen_addrs = xrecallocarray(options->listen_addrs,
662: options->num_listen_addrs, options->num_listen_addrs + 1,
663: sizeof(*options->listen_addrs));
664: i = options->num_listen_addrs++;
665: if (rdomain != NULL)
666: options->listen_addrs[i].rdomain = xstrdup(rdomain);
667: }
668: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 669:
1.74 stevesk 670: memset(&hints, 0, sizeof(hints));
1.138 djm 671: hints.ai_family = options->address_family;
1.74 stevesk 672: hints.ai_socktype = SOCK_STREAM;
673: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 674: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 675: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
676: fatal("bad addr or host: %s (%s)",
677: addr ? addr : "<NULL>",
1.173 dtucker 678: ssh_gai_strerror(gaierr));
1.74 stevesk 679: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
680: ;
1.315 djm 681: ai->ai_next = options->listen_addrs[i].addrs;
682: options->listen_addrs[i].addrs = aitop;
683: }
684:
685: /* Returns nonzero if the routing domain name is valid */
686: static int
687: valid_rdomain(const char *name)
688: {
689: const char *errstr;
690: long long num;
691: struct rt_tableinfo info;
692: int mib[6];
693: size_t miblen = sizeof(mib);
694:
695: if (name == NULL)
696: return 1;
697:
698: num = strtonum(name, 0, 255, &errstr);
699: if (errstr != NULL)
700: return 0;
701:
702: /* Check whether the table actually exists */
703: memset(mib, 0, sizeof(mib));
704: mib[0] = CTL_NET;
705: mib[1] = PF_ROUTE;
706: mib[4] = NET_RT_TABLE;
707: mib[5] = (int)num;
708: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
709: return 0;
710:
711: return 1;
1.29 markus 712: }
713:
1.266 dtucker 714: /*
715: * Queue a ListenAddress to be processed once we have all of the Ports
716: * and AddressFamily options.
717: */
718: static void
1.315 djm 719: queue_listen_addr(ServerOptions *options, const char *addr,
720: const char *rdomain, int port)
1.266 dtucker 721: {
1.315 djm 722: struct queued_listenaddr *qla;
723:
724: options->queued_listen_addrs = xrecallocarray(
725: options->queued_listen_addrs,
726: options->num_queued_listens, options->num_queued_listens + 1,
727: sizeof(*options->queued_listen_addrs));
728: qla = &options->queued_listen_addrs[options->num_queued_listens++];
729: qla->addr = xstrdup(addr);
730: qla->port = port;
731: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 732: }
733:
734: /*
735: * Process queued (text) ListenAddress entries.
736: */
737: static void
738: process_queued_listen_addrs(ServerOptions *options)
739: {
740: u_int i;
1.315 djm 741: struct queued_listenaddr *qla;
1.266 dtucker 742:
743: if (options->num_ports == 0)
744: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
745: if (options->address_family == -1)
746: options->address_family = AF_UNSPEC;
747:
748: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 749: qla = &options->queued_listen_addrs[i];
750: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
751: free(qla->addr);
752: free(qla->rdomain);
1.266 dtucker 753: }
754: free(options->queued_listen_addrs);
755: options->queued_listen_addrs = NULL;
756: options->num_queued_listens = 0;
757: }
758:
1.310 djm 759: /*
760: * Inform channels layer of permitopen options from configuration.
761: */
762: void
763: process_permitopen(struct ssh *ssh, ServerOptions *options)
764: {
765: u_int i;
766: int port;
767: char *host, *arg, *oarg;
768:
769: channel_clear_adm_permitted_opens(ssh);
770: if (options->num_permitted_opens == 0)
771: return; /* permit any */
772:
773: /* handle keywords: "any" / "none" */
774: if (options->num_permitted_opens == 1 &&
775: strcmp(options->permitted_opens[0], "any") == 0)
776: return;
777: if (options->num_permitted_opens == 1 &&
778: strcmp(options->permitted_opens[0], "none") == 0) {
779: channel_disable_adm_local_opens(ssh);
780: return;
781: }
782: /* Otherwise treat it as a list of permitted host:port */
783: for (i = 0; i < options->num_permitted_opens; i++) {
784: oarg = arg = xstrdup(options->permitted_opens[i]);
785: host = hpdelim(&arg);
786: if (host == NULL)
787: fatal("%s: missing host in PermitOpen", __func__);
788: host = cleanhostname(host);
789: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
790: fatal("%s: bad port number in PermitOpen", __func__);
791: /* Send it to channels layer */
792: channel_add_adm_permitted_opens(ssh, host, port);
793: free(oarg);
794: }
795: }
796:
1.226 dtucker 797: struct connection_info *
798: get_connection_info(int populate, int use_dns)
799: {
1.286 djm 800: struct ssh *ssh = active_state; /* XXX */
1.226 dtucker 801: static struct connection_info ci;
802:
803: if (!populate)
804: return &ci;
1.286 djm 805: ci.host = auth_get_canonical_hostname(ssh, use_dns);
806: ci.address = ssh_remote_ipaddr(ssh);
807: ci.laddress = ssh_local_ipaddr(ssh);
808: ci.lport = ssh_local_port(ssh);
1.317 djm 809: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 810: return &ci;
811: }
812:
1.153 dtucker 813: /*
814: * The strategy for the Match blocks is that the config file is parsed twice.
815: *
816: * The first time is at startup. activep is initialized to 1 and the
817: * directives in the global context are processed and acted on. Hitting a
818: * Match directive unsets activep and the directives inside the block are
819: * checked for syntax only.
820: *
821: * The second time is after a connection has been established but before
822: * authentication. activep is initialized to 2 and global config directives
823: * are ignored since they have already been processed. If the criteria in a
824: * Match block is met, activep is set and the subsequent directives
825: * processed and actioned until EOF or another Match block unsets it. Any
826: * options set are copied into the main server config.
827: *
828: * Potential additions/improvements:
1.295 djm 829: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 830: *
831: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
832: * Match Address 192.168.0.*
833: * Tag trusted
834: * Match Group wheel
835: * Tag trusted
836: * Match Tag trusted
837: * AllowTcpForwarding yes
838: * GatewayPorts clientspecified
839: * [...]
840: *
841: * - Add a PermittedChannelRequests directive
842: * Match Group shell
843: * PermittedChannelRequests session,forwarded-tcpip
844: */
845:
846: static int
1.165 dtucker 847: match_cfg_line_group(const char *grps, int line, const char *user)
848: {
849: int result = 0;
850: struct passwd *pw;
851:
852: if (user == NULL)
853: goto out;
854:
855: if ((pw = getpwnam(user)) == NULL) {
856: debug("Can't match group at line %d because user %.100s does "
857: "not exist", line, user);
858: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
859: debug("Can't Match group because user %.100s not in any group "
860: "at line %d", user, line);
1.186 djm 861: } else if (ga_match_pattern_list(grps) != 1) {
862: debug("user %.100s does not match group list %.100s at line %d",
863: user, grps, line);
1.165 dtucker 864: } else {
1.186 djm 865: debug("user %.100s matched group list %.100s at line %d", user,
866: grps, line);
1.165 dtucker 867: result = 1;
868: }
869: out:
870: ga_free();
871: return result;
872: }
873:
1.319 dtucker 874: static void
875: match_test_missing_fatal(const char *criteria, const char *attrib)
876: {
877: fatal("'Match %s' in configuration but '%s' not in connection "
878: "test specification.", criteria, attrib);
879: }
880:
1.226 dtucker 881: /*
1.230 dtucker 882: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 883: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 884: * not match.
1.226 dtucker 885: */
1.165 dtucker 886: static int
1.226 dtucker 887: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 888: {
1.243 dtucker 889: int result = 1, attributes = 0, port;
1.153 dtucker 890: char *arg, *attrib, *cp = *condition;
891:
1.226 dtucker 892: if (ci == NULL)
1.153 dtucker 893: debug3("checking syntax for 'Match %s'", cp);
894: else
1.226 dtucker 895: debug3("checking match for '%s' user %s host %s addr %s "
896: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
897: ci->host ? ci->host : "(null)",
898: ci->address ? ci->address : "(null)",
899: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 900:
901: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 902: attributes++;
903: if (strcasecmp(attrib, "all") == 0) {
904: if (attributes != 1 ||
905: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
906: error("'all' cannot be combined with other "
907: "Match attributes");
908: return -1;
909: }
910: *condition = cp;
911: return 1;
912: }
1.153 dtucker 913: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
914: error("Missing Match criteria for %s", attrib);
915: return -1;
916: }
917: if (strcasecmp(attrib, "user") == 0) {
1.319 dtucker 918: if (ci == NULL) {
1.153 dtucker 919: result = 0;
920: continue;
921: }
1.319 dtucker 922: if (ci->user == NULL)
923: match_test_missing_fatal("User", "user");
1.269 djm 924: if (match_pattern_list(ci->user, arg, 0) != 1)
1.153 dtucker 925: result = 0;
926: else
927: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 928: "line %d", ci->user, arg, line);
1.165 dtucker 929: } else if (strcasecmp(attrib, "group") == 0) {
1.319 dtucker 930: if (ci == NULL) {
1.226 dtucker 931: result = 0;
932: continue;
933: }
1.319 dtucker 934: if (ci->user == NULL)
935: match_test_missing_fatal("Group", "user");
1.226 dtucker 936: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 937: case -1:
938: return -1;
939: case 0:
940: result = 0;
941: }
1.153 dtucker 942: } else if (strcasecmp(attrib, "host") == 0) {
1.319 dtucker 943: if (ci == NULL) {
1.153 dtucker 944: result = 0;
945: continue;
946: }
1.319 dtucker 947: if (ci->host == NULL)
948: match_test_missing_fatal("Host", "host");
1.269 djm 949: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 950: result = 0;
951: else
952: debug("connection from %.100s matched 'Host "
1.226 dtucker 953: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 954: } else if (strcasecmp(attrib, "address") == 0) {
1.319 dtucker 955: if (ci == NULL) {
1.226 dtucker 956: result = 0;
957: continue;
958: }
1.319 dtucker 959: if (ci->address == NULL)
960: match_test_missing_fatal("Address", "addr");
1.226 dtucker 961: switch (addr_match_list(ci->address, arg)) {
1.181 djm 962: case 1:
963: debug("connection from %.100s matched 'Address "
1.226 dtucker 964: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 965: break;
966: case 0:
1.183 djm 967: case -1:
1.153 dtucker 968: result = 0;
1.181 djm 969: break;
1.183 djm 970: case -2:
1.181 djm 971: return -1;
1.153 dtucker 972: }
1.226 dtucker 973: } else if (strcasecmp(attrib, "localaddress") == 0){
1.319 dtucker 974: if (ci == NULL) {
1.226 dtucker 975: result = 0;
976: continue;
977: }
1.319 dtucker 978: if (ci->laddress == NULL)
979: match_test_missing_fatal("LocalAddress",
980: "laddr");
1.226 dtucker 981: switch (addr_match_list(ci->laddress, arg)) {
982: case 1:
983: debug("connection from %.100s matched "
984: "'LocalAddress %.100s' at line %d",
985: ci->laddress, arg, line);
986: break;
987: case 0:
988: case -1:
989: result = 0;
990: break;
991: case -2:
992: return -1;
993: }
994: } else if (strcasecmp(attrib, "localport") == 0) {
995: if ((port = a2port(arg)) == -1) {
996: error("Invalid LocalPort '%s' on Match line",
997: arg);
998: return -1;
999: }
1.319 dtucker 1000: if (ci == NULL) {
1.226 dtucker 1001: result = 0;
1002: continue;
1003: }
1.319 dtucker 1004: if (ci->lport == 0)
1005: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1006: /* TODO support port lists */
1007: if (port == ci->lport)
1008: debug("connection from %.100s matched "
1009: "'LocalPort %d' at line %d",
1010: ci->laddress, port, line);
1011: else
1012: result = 0;
1.317 djm 1013: } else if (strcasecmp(attrib, "rdomain") == 0) {
1014: if (ci == NULL || ci->rdomain == NULL) {
1015: result = 0;
1016: continue;
1017: }
1018: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1019: result = 0;
1020: else
1021: debug("user %.100s matched 'RDomain %.100s' at "
1022: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1023: } else {
1024: error("Unsupported Match attribute %s", attrib);
1025: return -1;
1026: }
1.243 dtucker 1027: }
1028: if (attributes == 0) {
1029: error("One or more attributes required for Match");
1030: return -1;
1.153 dtucker 1031: }
1.226 dtucker 1032: if (ci != NULL)
1.153 dtucker 1033: debug3("match %sfound", result ? "" : "not ");
1034: *condition = cp;
1035: return result;
1036: }
1037:
1.158 dtucker 1038: #define WHITESPACE " \t\r\n"
1039:
1.220 djm 1040: /* Multistate option parsing */
1041: struct multistate {
1042: char *key;
1043: int value;
1044: };
1.320 djm 1045: static const struct multistate multistate_flag[] = {
1046: { "yes", 1 },
1047: { "no", 0 },
1048: { NULL, -1 }
1049: };
1.220 djm 1050: static const struct multistate multistate_addressfamily[] = {
1051: { "inet", AF_INET },
1052: { "inet6", AF_INET6 },
1053: { "any", AF_UNSPEC },
1054: { NULL, -1 }
1055: };
1056: static const struct multistate multistate_permitrootlogin[] = {
1057: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1058: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1059: { "forced-commands-only", PERMIT_FORCED_ONLY },
1060: { "yes", PERMIT_YES },
1061: { "no", PERMIT_NO },
1062: { NULL, -1 }
1063: };
1064: static const struct multistate multistate_compression[] = {
1.297 djm 1065: { "yes", COMP_DELAYED },
1.220 djm 1066: { "delayed", COMP_DELAYED },
1067: { "no", COMP_NONE },
1068: { NULL, -1 }
1069: };
1070: static const struct multistate multistate_gatewayports[] = {
1071: { "clientspecified", 2 },
1072: { "yes", 1 },
1073: { "no", 0 },
1.222 djm 1074: { NULL, -1 }
1075: };
1.233 djm 1076: static const struct multistate multistate_tcpfwd[] = {
1077: { "yes", FORWARD_ALLOW },
1078: { "all", FORWARD_ALLOW },
1079: { "no", FORWARD_DENY },
1080: { "remote", FORWARD_REMOTE },
1081: { "local", FORWARD_LOCAL },
1082: { NULL, -1 }
1083: };
1.220 djm 1084:
1.94 markus 1085: int
1086: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 1087: const char *filename, int linenum, int *activep,
1088: struct connection_info *connectinfo)
1.1 deraadt 1089: {
1.310 djm 1090: char *cp, **charptr, *arg, *arg2, *p;
1.237 dtucker 1091: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 1092: SyslogFacility *log_facility_ptr;
1093: LogLevel *log_level_ptr;
1.25 markus 1094: ServerOpCodes opcode;
1.153 dtucker 1095: u_int i, flags = 0;
1.151 djm 1096: size_t len;
1.237 dtucker 1097: long long val64;
1.220 djm 1098: const struct multistate *multistate_ptr;
1.322 dtucker 1099: const char *errstr;
1.303 djm 1100:
1101: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1102: if ((len = strlen(line)) == 0)
1103: return 0;
1104: for (len--; len > 0; len--) {
1105: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1106: break;
1107: line[len] = '\0';
1108: }
1.25 markus 1109:
1.94 markus 1110: cp = line;
1.148 dtucker 1111: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1112: return 0;
1.94 markus 1113: /* Ignore leading whitespace */
1114: if (*arg == '\0')
1115: arg = strdelim(&cp);
1116: if (!arg || !*arg || *arg == '#')
1117: return 0;
1118: intptr = NULL;
1119: charptr = NULL;
1.153 dtucker 1120: opcode = parse_token(arg, filename, linenum, &flags);
1121:
1122: if (activep == NULL) { /* We are processing a command line directive */
1123: cmdline = 1;
1124: activep = &cmdline;
1125: }
1126: if (*activep && opcode != sMatch)
1127: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1128: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1129: if (connectinfo == NULL) {
1.153 dtucker 1130: fatal("%s line %d: Directive '%s' is not allowed "
1131: "within a Match block", filename, linenum, arg);
1132: } else { /* this is a directive we have already processed */
1133: while (arg)
1134: arg = strdelim(&cp);
1135: return 0;
1136: }
1137: }
1138:
1.94 markus 1139: switch (opcode) {
1140: case sBadOption:
1141: return -1;
1142: case sPort:
1143: /* ignore ports from configfile if cmdline specifies ports */
1144: if (options->ports_from_cmdline)
1145: return 0;
1146: if (options->num_ports >= MAX_PORTS)
1147: fatal("%s line %d: too many ports.",
1148: filename, linenum);
1.48 provos 1149: arg = strdelim(&cp);
1.94 markus 1150: if (!arg || *arg == '\0')
1151: fatal("%s line %d: missing port number.",
1152: filename, linenum);
1153: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1154: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1155: fatal("%s line %d: Badly formatted port number.",
1156: filename, linenum);
1157: break;
1.29 markus 1158:
1.94 markus 1159: case sLoginGraceTime:
1160: intptr = &options->login_grace_time;
1.180 djm 1161: parse_time:
1.94 markus 1162: arg = strdelim(&cp);
1163: if (!arg || *arg == '\0')
1164: fatal("%s line %d: missing time value.",
1165: filename, linenum);
1166: if ((value = convtime(arg)) == -1)
1167: fatal("%s line %d: invalid time value.",
1168: filename, linenum);
1.268 djm 1169: if (*activep && *intptr == -1)
1.94 markus 1170: *intptr = value;
1171: break;
1172:
1173: case sListenAddress:
1174: arg = strdelim(&cp);
1.139 djm 1175: if (arg == NULL || *arg == '\0')
1176: fatal("%s line %d: missing address",
1.94 markus 1177: filename, linenum);
1.144 dtucker 1178: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1179: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1180: && strchr(p+1, ':') != NULL) {
1.315 djm 1181: port = 0;
1182: p = arg;
1183: } else {
1184: p = hpdelim(&arg);
1185: if (p == NULL)
1186: fatal("%s line %d: bad address:port usage",
1187: filename, linenum);
1188: p = cleanhostname(p);
1189: if (arg == NULL)
1190: port = 0;
1191: else if ((port = a2port(arg)) <= 0)
1192: fatal("%s line %d: bad port number",
1193: filename, linenum);
1194: }
1195: /* Optional routing table */
1196: arg2 = NULL;
1197: if ((arg = strdelim(&cp)) != NULL) {
1198: if (strcmp(arg, "rdomain") != 0 ||
1199: (arg2 = strdelim(&cp)) == NULL)
1200: fatal("%s line %d: bad ListenAddress syntax",
1201: filename, linenum);
1202: if (!valid_rdomain(arg2))
1203: fatal("%s line %d: bad routing domain",
1204: filename, linenum);
1.144 dtucker 1205: }
1.139 djm 1206:
1.315 djm 1207: queue_listen_addr(options, p, arg2, port);
1.25 markus 1208:
1.138 djm 1209: break;
1210:
1211: case sAddressFamily:
1.220 djm 1212: intptr = &options->address_family;
1213: multistate_ptr = multistate_addressfamily;
1214: parse_multistate:
1.138 djm 1215: arg = strdelim(&cp);
1.141 markus 1216: if (!arg || *arg == '\0')
1.220 djm 1217: fatal("%s line %d: missing argument.",
1.141 markus 1218: filename, linenum);
1.220 djm 1219: value = -1;
1220: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1221: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1222: value = multistate_ptr[i].value;
1223: break;
1224: }
1225: }
1226: if (value == -1)
1227: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1228: filename, linenum, arg);
1.220 djm 1229: if (*activep && *intptr == -1)
1.138 djm 1230: *intptr = value;
1.94 markus 1231: break;
1232:
1233: case sHostKeyFile:
1234: arg = strdelim(&cp);
1235: if (!arg || *arg == '\0')
1236: fatal("%s line %d: missing file name.",
1237: filename, linenum);
1.314 djm 1238: if (*activep)
1239: servconf_add_hostkey(filename, linenum, options, arg);
1.94 markus 1240: break;
1.76 stevesk 1241:
1.240 markus 1242: case sHostKeyAgent:
1243: charptr = &options->host_key_agent;
1244: arg = strdelim(&cp);
1245: if (!arg || *arg == '\0')
1246: fatal("%s line %d: missing socket name.",
1247: filename, linenum);
1248: if (*activep && *charptr == NULL)
1249: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1250: xstrdup(arg) : derelativise_path(arg);
1251: break;
1252:
1.203 djm 1253: case sHostCertificate:
1.314 djm 1254: arg = strdelim(&cp);
1255: if (!arg || *arg == '\0')
1256: fatal("%s line %d: missing file name.",
1257: filename, linenum);
1258: if (*activep)
1259: servconf_add_hostcert(filename, linenum, options, arg);
1260: break;
1.203 djm 1261:
1.94 markus 1262: case sPidFile:
1263: charptr = &options->pid_file;
1.314 djm 1264: parse_filename:
1265: arg = strdelim(&cp);
1266: if (!arg || *arg == '\0')
1267: fatal("%s line %d: missing file name.",
1268: filename, linenum);
1269: if (*activep && *charptr == NULL) {
1270: *charptr = derelativise_path(arg);
1271: /* increase optional counter */
1272: if (intptr != NULL)
1273: *intptr = *intptr + 1;
1274: }
1275: break;
1.25 markus 1276:
1.94 markus 1277: case sPermitRootLogin:
1278: intptr = &options->permit_root_login;
1.220 djm 1279: multistate_ptr = multistate_permitrootlogin;
1280: goto parse_multistate;
1.36 markus 1281:
1.94 markus 1282: case sIgnoreRhosts:
1283: intptr = &options->ignore_rhosts;
1.180 djm 1284: parse_flag:
1.320 djm 1285: multistate_ptr = multistate_flag;
1286: goto parse_multistate;
1.94 markus 1287:
1288: case sIgnoreUserKnownHosts:
1289: intptr = &options->ignore_user_known_hosts;
1290: goto parse_flag;
1291:
1292: case sHostbasedAuthentication:
1293: intptr = &options->hostbased_authentication;
1294: goto parse_flag;
1295:
1296: case sHostbasedUsesNameFromPacketOnly:
1297: intptr = &options->hostbased_uses_name_from_packet_only;
1298: goto parse_flag;
1299:
1.258 djm 1300: case sHostbasedAcceptedKeyTypes:
1301: charptr = &options->hostbased_key_types;
1302: parse_keytypes:
1303: arg = strdelim(&cp);
1304: if (!arg || *arg == '\0')
1305: fatal("%s line %d: Missing argument.",
1306: filename, linenum);
1.304 djm 1307: if (*arg != '-' &&
1308: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.258 djm 1309: fatal("%s line %d: Bad key types '%s'.",
1310: filename, linenum, arg ? arg : "<NONE>");
1311: if (*activep && *charptr == NULL)
1312: *charptr = xstrdup(arg);
1313: break;
1314:
1.276 markus 1315: case sHostKeyAlgorithms:
1316: charptr = &options->hostkeyalgorithms;
1317: goto parse_keytypes;
1318:
1.94 markus 1319: case sPubkeyAuthentication:
1320: intptr = &options->pubkey_authentication;
1321: goto parse_flag;
1.119 jakob 1322:
1.258 djm 1323: case sPubkeyAcceptedKeyTypes:
1324: charptr = &options->pubkey_key_types;
1325: goto parse_keytypes;
1326:
1.94 markus 1327: case sKerberosAuthentication:
1328: intptr = &options->kerberos_authentication;
1329: goto parse_flag;
1330:
1331: case sKerberosOrLocalPasswd:
1332: intptr = &options->kerberos_or_local_passwd;
1333: goto parse_flag;
1334:
1335: case sKerberosTicketCleanup:
1336: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1337: goto parse_flag;
1338:
1339: case sKerberosGetAFSToken:
1340: intptr = &options->kerberos_get_afs_token;
1.125 markus 1341: goto parse_flag;
1342:
1343: case sGssAuthentication:
1344: intptr = &options->gss_authentication;
1345: goto parse_flag;
1346:
1347: case sGssCleanupCreds:
1348: intptr = &options->gss_cleanup_creds;
1.271 djm 1349: goto parse_flag;
1350:
1351: case sGssStrictAcceptor:
1352: intptr = &options->gss_strict_acceptor;
1.94 markus 1353: goto parse_flag;
1354:
1355: case sPasswordAuthentication:
1356: intptr = &options->password_authentication;
1357: goto parse_flag;
1358:
1359: case sKbdInteractiveAuthentication:
1360: intptr = &options->kbd_interactive_authentication;
1361: goto parse_flag;
1362:
1363: case sChallengeResponseAuthentication:
1364: intptr = &options->challenge_response_authentication;
1365: goto parse_flag;
1366:
1367: case sPrintMotd:
1368: intptr = &options->print_motd;
1369: goto parse_flag;
1370:
1371: case sPrintLastLog:
1372: intptr = &options->print_lastlog;
1373: goto parse_flag;
1374:
1375: case sX11Forwarding:
1376: intptr = &options->x11_forwarding;
1377: goto parse_flag;
1378:
1379: case sX11DisplayOffset:
1380: intptr = &options->x11_display_offset;
1.293 naddy 1381: parse_int:
1382: arg = strdelim(&cp);
1.322 dtucker 1383: if ((errstr = atoi_err(arg, &value)) != NULL)
1384: fatal("%s line %d: integer value %s.",
1385: filename, linenum, errstr);
1.293 naddy 1386: if (*activep && *intptr == -1)
1387: *intptr = value;
1388: break;
1.99 stevesk 1389:
1390: case sX11UseLocalhost:
1391: intptr = &options->x11_use_localhost;
1392: goto parse_flag;
1.94 markus 1393:
1394: case sXAuthLocation:
1395: charptr = &options->xauth_location;
1396: goto parse_filename;
1397:
1.244 djm 1398: case sPermitTTY:
1399: intptr = &options->permit_tty;
1400: goto parse_flag;
1401:
1.250 djm 1402: case sPermitUserRC:
1403: intptr = &options->permit_user_rc;
1404: goto parse_flag;
1405:
1.94 markus 1406: case sStrictModes:
1407: intptr = &options->strict_modes;
1408: goto parse_flag;
1409:
1.129 markus 1410: case sTCPKeepAlive:
1411: intptr = &options->tcp_keep_alive;
1.94 markus 1412: goto parse_flag;
1413:
1414: case sEmptyPasswd:
1415: intptr = &options->permit_empty_passwd;
1.113 markus 1416: goto parse_flag;
1417:
1418: case sPermitUserEnvironment:
1419: intptr = &options->permit_user_env;
1.94 markus 1420: goto parse_flag;
1421:
1.111 markus 1422: case sCompression:
1423: intptr = &options->compression;
1.220 djm 1424: multistate_ptr = multistate_compression;
1425: goto parse_multistate;
1.94 markus 1426:
1.235 dtucker 1427: case sRekeyLimit:
1428: arg = strdelim(&cp);
1429: if (!arg || *arg == '\0')
1430: fatal("%.200s line %d: Missing argument.", filename,
1431: linenum);
1432: if (strcmp(arg, "default") == 0) {
1433: val64 = 0;
1434: } else {
1.236 dtucker 1435: if (scan_scaled(arg, &val64) == -1)
1436: fatal("%.200s line %d: Bad number '%s': %s",
1437: filename, linenum, arg, strerror(errno));
1.235 dtucker 1438: if (val64 != 0 && val64 < 16)
1439: fatal("%.200s line %d: RekeyLimit too small",
1440: filename, linenum);
1441: }
1442: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1443: options->rekey_limit = val64;
1.235 dtucker 1444: if (cp != NULL) { /* optional rekey interval present */
1445: if (strcmp(cp, "none") == 0) {
1446: (void)strdelim(&cp); /* discard */
1447: break;
1448: }
1449: intptr = &options->rekey_interval;
1450: goto parse_time;
1451: }
1452: break;
1453:
1.94 markus 1454: case sGatewayPorts:
1.251 millert 1455: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1456: multistate_ptr = multistate_gatewayports;
1457: goto parse_multistate;
1.25 markus 1458:
1.122 markus 1459: case sUseDNS:
1460: intptr = &options->use_dns;
1.94 markus 1461: goto parse_flag;
1.53 markus 1462:
1.94 markus 1463: case sLogFacility:
1.174 dtucker 1464: log_facility_ptr = &options->log_facility;
1.94 markus 1465: arg = strdelim(&cp);
1466: value = log_facility_number(arg);
1.101 markus 1467: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1468: fatal("%.200s line %d: unsupported log facility '%s'",
1469: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1470: if (*log_facility_ptr == -1)
1471: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1472: break;
1.25 markus 1473:
1.94 markus 1474: case sLogLevel:
1.174 dtucker 1475: log_level_ptr = &options->log_level;
1.94 markus 1476: arg = strdelim(&cp);
1477: value = log_level_number(arg);
1.101 markus 1478: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1479: fatal("%.200s line %d: unsupported log level '%s'",
1480: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1481: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1482: *log_level_ptr = (LogLevel) value;
1.94 markus 1483: break;
1484:
1485: case sAllowTcpForwarding:
1486: intptr = &options->allow_tcp_forwarding;
1.233 djm 1487: multistate_ptr = multistate_tcpfwd;
1488: goto parse_multistate;
1.102 provos 1489:
1.251 millert 1490: case sAllowStreamLocalForwarding:
1491: intptr = &options->allow_streamlocal_forwarding;
1492: multistate_ptr = multistate_tcpfwd;
1493: goto parse_multistate;
1494:
1.178 pyr 1495: case sAllowAgentForwarding:
1496: intptr = &options->allow_agent_forwarding;
1497: goto parse_flag;
1498:
1.301 djm 1499: case sDisableForwarding:
1500: intptr = &options->disable_forwarding;
1501: goto parse_flag;
1502:
1.94 markus 1503: case sAllowUsers:
1504: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1505: if (match_user(NULL, NULL, NULL, arg) == -1)
1506: fatal("%s line %d: invalid AllowUsers pattern: "
1507: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1508: if (!*activep)
1509: continue;
1.314 djm 1510: array_append(filename, linenum, "AllowUsers",
1511: &options->allow_users, &options->num_allow_users,
1512: arg);
1.94 markus 1513: }
1514: break;
1.25 markus 1515:
1.94 markus 1516: case sDenyUsers:
1517: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1518: if (match_user(NULL, NULL, NULL, arg) == -1)
1519: fatal("%s line %d: invalid DenyUsers pattern: "
1520: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1521: if (!*activep)
1522: continue;
1.314 djm 1523: array_append(filename, linenum, "DenyUsers",
1524: &options->deny_users, &options->num_deny_users,
1525: arg);
1.94 markus 1526: }
1527: break;
1.25 markus 1528:
1.94 markus 1529: case sAllowGroups:
1530: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1531: if (!*activep)
1532: continue;
1.314 djm 1533: array_append(filename, linenum, "AllowGroups",
1534: &options->allow_groups, &options->num_allow_groups,
1535: arg);
1.94 markus 1536: }
1537: break;
1.33 markus 1538:
1.94 markus 1539: case sDenyGroups:
1540: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1541: if (!*activep)
1542: continue;
1.314 djm 1543: array_append(filename, linenum, "DenyGroups",
1544: &options->deny_groups, &options->num_deny_groups,
1545: arg);
1.94 markus 1546: }
1547: break;
1.66 markus 1548:
1.94 markus 1549: case sCiphers:
1550: arg = strdelim(&cp);
1551: if (!arg || *arg == '\0')
1552: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1553: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1554: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1555: filename, linenum, arg ? arg : "<NONE>");
1556: if (options->ciphers == NULL)
1557: options->ciphers = xstrdup(arg);
1558: break;
1.33 markus 1559:
1.94 markus 1560: case sMacs:
1561: arg = strdelim(&cp);
1562: if (!arg || *arg == '\0')
1563: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1564: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1565: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1566: filename, linenum, arg ? arg : "<NONE>");
1567: if (options->macs == NULL)
1568: options->macs = xstrdup(arg);
1.211 djm 1569: break;
1570:
1571: case sKexAlgorithms:
1572: arg = strdelim(&cp);
1573: if (!arg || *arg == '\0')
1574: fatal("%s line %d: Missing argument.",
1575: filename, linenum);
1.304 djm 1576: if (*arg != '-' &&
1577: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.211 djm 1578: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1579: filename, linenum, arg ? arg : "<NONE>");
1580: if (options->kex_algorithms == NULL)
1581: options->kex_algorithms = xstrdup(arg);
1.94 markus 1582: break;
1.43 jakob 1583:
1.94 markus 1584: case sSubsystem:
1585: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1586: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1587: filename, linenum);
1.94 markus 1588: }
1589: arg = strdelim(&cp);
1590: if (!arg || *arg == '\0')
1591: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1592: filename, linenum);
1.153 dtucker 1593: if (!*activep) {
1594: arg = strdelim(&cp);
1595: break;
1596: }
1.94 markus 1597: for (i = 0; i < options->num_subsystems; i++)
1598: if (strcmp(arg, options->subsystem_name[i]) == 0)
1599: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1600: filename, linenum, arg);
1.94 markus 1601: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1602: arg = strdelim(&cp);
1603: if (!arg || *arg == '\0')
1604: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1605: filename, linenum);
1.94 markus 1606: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1607:
1608: /* Collect arguments (separate to executable) */
1609: p = xstrdup(arg);
1610: len = strlen(p) + 1;
1611: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1612: len += 1 + strlen(arg);
1.264 deraadt 1613: p = xreallocarray(p, 1, len);
1.151 djm 1614: strlcat(p, " ", len);
1615: strlcat(p, arg, len);
1616: }
1617: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1618: options->num_subsystems++;
1619: break;
1.46 markus 1620:
1.94 markus 1621: case sMaxStartups:
1622: arg = strdelim(&cp);
1623: if (!arg || *arg == '\0')
1624: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1625: filename, linenum);
1.94 markus 1626: if ((n = sscanf(arg, "%d:%d:%d",
1627: &options->max_startups_begin,
1628: &options->max_startups_rate,
1629: &options->max_startups)) == 3) {
1630: if (options->max_startups_begin >
1631: options->max_startups ||
1632: options->max_startups_rate > 100 ||
1633: options->max_startups_rate < 1)
1.50 markus 1634: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1635: filename, linenum);
1.94 markus 1636: } else if (n != 1)
1637: fatal("%s line %d: Illegal MaxStartups spec.",
1638: filename, linenum);
1639: else
1640: options->max_startups = options->max_startups_begin;
1641: break;
1.133 dtucker 1642:
1643: case sMaxAuthTries:
1644: intptr = &options->max_authtries;
1645: goto parse_int;
1.94 markus 1646:
1.180 djm 1647: case sMaxSessions:
1648: intptr = &options->max_sessions;
1649: goto parse_int;
1650:
1.94 markus 1651: case sBanner:
1652: charptr = &options->banner;
1653: goto parse_filename;
1.176 djm 1654:
1.94 markus 1655: /*
1656: * These options can contain %X options expanded at
1657: * connect time, so that you can specify paths like:
1658: *
1659: * AuthorizedKeysFile /etc/ssh_keys/%u
1660: */
1661: case sAuthorizedKeysFile:
1.219 djm 1662: if (*activep && options->num_authkeys_files == 0) {
1663: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1664: arg = tilde_expand_filename(arg, getuid());
1665: array_append(filename, linenum,
1666: "AuthorizedKeysFile",
1667: &options->authorized_keys_files,
1668: &options->num_authkeys_files, arg);
1669: free(arg);
1.219 djm 1670: }
1671: }
1672: return 0;
1673:
1.208 djm 1674: case sAuthorizedPrincipalsFile:
1675: charptr = &options->authorized_principals_file;
1.205 djm 1676: arg = strdelim(&cp);
1677: if (!arg || *arg == '\0')
1678: fatal("%s line %d: missing file name.",
1679: filename, linenum);
1680: if (*activep && *charptr == NULL) {
1.206 markus 1681: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1682: /* increase optional counter */
1683: if (intptr != NULL)
1684: *intptr = *intptr + 1;
1685: }
1686: break;
1.94 markus 1687:
1688: case sClientAliveInterval:
1689: intptr = &options->client_alive_interval;
1690: goto parse_time;
1691:
1692: case sClientAliveCountMax:
1693: intptr = &options->client_alive_count_max;
1694: goto parse_int;
1.131 djm 1695:
1696: case sAcceptEnv:
1697: while ((arg = strdelim(&cp)) && *arg != '\0') {
1698: if (strchr(arg, '=') != NULL)
1699: fatal("%s line %d: Invalid environment name.",
1700: filename, linenum);
1.153 dtucker 1701: if (!*activep)
1.227 markus 1702: continue;
1.314 djm 1703: array_append(filename, linenum, "AcceptEnv",
1704: &options->accept_env, &options->num_accept_env,
1705: arg);
1.131 djm 1706: }
1707: break;
1.145 reyk 1708:
1709: case sPermitTunnel:
1710: intptr = &options->permit_tun;
1.146 reyk 1711: arg = strdelim(&cp);
1712: if (!arg || *arg == '\0')
1713: fatal("%s line %d: Missing yes/point-to-point/"
1714: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1715: value = -1;
1716: for (i = 0; tunmode_desc[i].val != -1; i++)
1717: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1718: value = tunmode_desc[i].val;
1719: break;
1720: }
1721: if (value == -1)
1.146 reyk 1722: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1723: "no argument: %s", filename, linenum, arg);
1.268 djm 1724: if (*activep && *intptr == -1)
1.146 reyk 1725: *intptr = value;
1726: break;
1.94 markus 1727:
1.153 dtucker 1728: case sMatch:
1729: if (cmdline)
1730: fatal("Match directive not supported as a command-line "
1731: "option");
1.226 dtucker 1732: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1733: if (value < 0)
1734: fatal("%s line %d: Bad Match condition", filename,
1735: linenum);
1736: *activep = value;
1.156 dtucker 1737: break;
1738:
1739: case sPermitOpen:
1740: arg = strdelim(&cp);
1741: if (!arg || *arg == '\0')
1742: fatal("%s line %d: missing PermitOpen specification",
1743: filename, linenum);
1.313 djm 1744: value = options->num_permitted_opens; /* modified later */
1.310 djm 1745: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.313 djm 1746: if (*activep && value == 0) {
1.224 dtucker 1747: options->num_permitted_opens = 1;
1.310 djm 1748: options->permitted_opens = xcalloc(1,
1749: sizeof(*options->permitted_opens));
1750: options->permitted_opens[0] = xstrdup(arg);
1.311 dtucker 1751: }
1.156 dtucker 1752: break;
1753: }
1.159 dtucker 1754: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.310 djm 1755: arg2 = xstrdup(arg);
1.159 dtucker 1756: p = hpdelim(&arg);
1757: if (p == NULL)
1758: fatal("%s line %d: missing host in PermitOpen",
1759: filename, linenum);
1760: p = cleanhostname(p);
1.223 dtucker 1761: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1762: fatal("%s line %d: bad port number in "
1763: "PermitOpen", filename, linenum);
1.313 djm 1764: if (*activep && value == 0) {
1.314 djm 1765: array_append(filename, linenum,
1766: "PermitOpen",
1767: &options->permitted_opens,
1768: &options->num_permitted_opens, arg2);
1769: }
1770: free(arg2);
1.159 dtucker 1771: }
1.153 dtucker 1772: break;
1773:
1.158 dtucker 1774: case sForceCommand:
1.262 dtucker 1775: if (cp == NULL || *cp == '\0')
1.158 dtucker 1776: fatal("%.200s line %d: Missing argument.", filename,
1777: linenum);
1778: len = strspn(cp, WHITESPACE);
1779: if (*activep && options->adm_forced_command == NULL)
1780: options->adm_forced_command = xstrdup(cp + len);
1781: return 0;
1782:
1.176 djm 1783: case sChrootDirectory:
1784: charptr = &options->chroot_directory;
1.177 djm 1785:
1786: arg = strdelim(&cp);
1787: if (!arg || *arg == '\0')
1788: fatal("%s line %d: missing file name.",
1789: filename, linenum);
1790: if (*activep && *charptr == NULL)
1791: *charptr = xstrdup(arg);
1792: break;
1.176 djm 1793:
1.204 djm 1794: case sTrustedUserCAKeys:
1795: charptr = &options->trusted_user_ca_keys;
1796: goto parse_filename;
1797:
1798: case sRevokedKeys:
1799: charptr = &options->revoked_keys_file;
1800: goto parse_filename;
1801:
1.213 djm 1802: case sIPQoS:
1803: arg = strdelim(&cp);
1804: if ((value = parse_ipqos(arg)) == -1)
1805: fatal("%s line %d: Bad IPQoS value: %s",
1806: filename, linenum, arg);
1807: arg = strdelim(&cp);
1808: if (arg == NULL)
1809: value2 = value;
1810: else if ((value2 = parse_ipqos(arg)) == -1)
1811: fatal("%s line %d: Bad IPQoS value: %s",
1812: filename, linenum, arg);
1813: if (*activep) {
1814: options->ip_qos_interactive = value;
1815: options->ip_qos_bulk = value2;
1816: }
1817: break;
1818:
1.225 djm 1819: case sVersionAddendum:
1.262 dtucker 1820: if (cp == NULL || *cp == '\0')
1.225 djm 1821: fatal("%.200s line %d: Missing argument.", filename,
1822: linenum);
1823: len = strspn(cp, WHITESPACE);
1824: if (*activep && options->version_addendum == NULL) {
1825: if (strcasecmp(cp + len, "none") == 0)
1826: options->version_addendum = xstrdup("");
1827: else if (strchr(cp + len, '\r') != NULL)
1828: fatal("%.200s line %d: Invalid argument",
1829: filename, linenum);
1830: else
1831: options->version_addendum = xstrdup(cp + len);
1832: }
1833: return 0;
1834:
1.231 djm 1835: case sAuthorizedKeysCommand:
1.255 jsg 1836: if (cp == NULL)
1837: fatal("%.200s line %d: Missing argument.", filename,
1838: linenum);
1.231 djm 1839: len = strspn(cp, WHITESPACE);
1840: if (*activep && options->authorized_keys_command == NULL) {
1841: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1842: fatal("%.200s line %d: AuthorizedKeysCommand "
1843: "must be an absolute path",
1844: filename, linenum);
1845: options->authorized_keys_command = xstrdup(cp + len);
1846: }
1847: return 0;
1848:
1849: case sAuthorizedKeysCommandUser:
1850: charptr = &options->authorized_keys_command_user;
1851:
1852: arg = strdelim(&cp);
1.255 jsg 1853: if (!arg || *arg == '\0')
1854: fatal("%s line %d: missing AuthorizedKeysCommandUser "
1855: "argument.", filename, linenum);
1.231 djm 1856: if (*activep && *charptr == NULL)
1857: *charptr = xstrdup(arg);
1858: break;
1859:
1.270 djm 1860: case sAuthorizedPrincipalsCommand:
1861: if (cp == NULL)
1862: fatal("%.200s line %d: Missing argument.", filename,
1863: linenum);
1864: len = strspn(cp, WHITESPACE);
1865: if (*activep &&
1866: options->authorized_principals_command == NULL) {
1867: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1868: fatal("%.200s line %d: "
1869: "AuthorizedPrincipalsCommand must be "
1870: "an absolute path", filename, linenum);
1871: options->authorized_principals_command =
1872: xstrdup(cp + len);
1873: }
1874: return 0;
1875:
1876: case sAuthorizedPrincipalsCommandUser:
1877: charptr = &options->authorized_principals_command_user;
1878:
1879: arg = strdelim(&cp);
1880: if (!arg || *arg == '\0')
1881: fatal("%s line %d: missing "
1882: "AuthorizedPrincipalsCommandUser argument.",
1883: filename, linenum);
1884: if (*activep && *charptr == NULL)
1885: *charptr = xstrdup(arg);
1886: break;
1887:
1.232 djm 1888: case sAuthenticationMethods:
1.268 djm 1889: if (options->num_auth_methods == 0) {
1.291 djm 1890: value = 0; /* seen "any" pseudo-method */
1.292 djm 1891: value2 = 0; /* sucessfully parsed any method */
1.232 djm 1892: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 1893: if (strcmp(arg, "any") == 0) {
1894: if (options->num_auth_methods > 0) {
1895: fatal("%s line %d: \"any\" "
1896: "must appear alone in "
1897: "AuthenticationMethods",
1898: filename, linenum);
1899: }
1900: value = 1;
1901: } else if (value) {
1902: fatal("%s line %d: \"any\" must appear "
1903: "alone in AuthenticationMethods",
1904: filename, linenum);
1905: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 1906: fatal("%s line %d: invalid "
1907: "authentication method list.",
1908: filename, linenum);
1.291 djm 1909: }
1.292 djm 1910: value2 = 1;
1.268 djm 1911: if (!*activep)
1912: continue;
1.314 djm 1913: array_append(filename, linenum,
1914: "AuthenticationMethods",
1915: &options->auth_methods,
1916: &options->num_auth_methods, arg);
1.232 djm 1917: }
1.292 djm 1918: if (value2 == 0) {
1.291 djm 1919: fatal("%s line %d: no AuthenticationMethods "
1920: "specified", filename, linenum);
1921: }
1.232 djm 1922: }
1923: return 0;
1924:
1.251 millert 1925: case sStreamLocalBindMask:
1926: arg = strdelim(&cp);
1927: if (!arg || *arg == '\0')
1.268 djm 1928: fatal("%s line %d: missing StreamLocalBindMask "
1929: "argument.", filename, linenum);
1.251 millert 1930: /* Parse mode in octal format */
1931: value = strtol(arg, &p, 8);
1932: if (arg == p || value < 0 || value > 0777)
1933: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 1934: if (*activep)
1935: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 1936: break;
1937:
1938: case sStreamLocalBindUnlink:
1939: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1940: goto parse_flag;
1941:
1.256 djm 1942: case sFingerprintHash:
1943: arg = strdelim(&cp);
1944: if (!arg || *arg == '\0')
1945: fatal("%.200s line %d: Missing argument.",
1946: filename, linenum);
1947: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1948: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1949: filename, linenum, arg);
1950: if (*activep)
1951: options->fingerprint_hash = value;
1952: break;
1953:
1.309 djm 1954: case sExposeAuthInfo:
1955: intptr = &options->expose_userauth_info;
1956: goto parse_flag;
1957:
1.316 djm 1958: case sRDomain:
1959: charptr = &options->routing_domain;
1960: arg = strdelim(&cp);
1961: if (!arg || *arg == '\0')
1962: fatal("%.200s line %d: Missing argument.",
1963: filename, linenum);
1964: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
1965: !valid_rdomain(arg))
1966: fatal("%s line %d: bad routing domain",
1967: filename, linenum);
1968: if (*activep && *charptr == NULL)
1969: *charptr = xstrdup(arg);
1.321 dtucker 1970: break;
1.316 djm 1971:
1.94 markus 1972: case sDeprecated:
1.295 djm 1973: case sIgnore:
1.121 jakob 1974: case sUnsupported:
1.295 djm 1975: do_log2(opcode == sIgnore ?
1976: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
1977: "%s line %d: %s option %s", filename, linenum,
1978: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 1979: while (arg)
1980: arg = strdelim(&cp);
1981: break;
1982:
1983: default:
1984: fatal("%s line %d: Missing handler for opcode %s (%d)",
1985: filename, linenum, arg, opcode);
1986: }
1987: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1988: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1989: filename, linenum, arg);
1990: return 0;
1991: }
1992:
1993: /* Reads the server configuration file. */
1.25 markus 1994:
1.94 markus 1995: void
1.134 djm 1996: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1997: {
1.229 dtucker 1998: char line[4096], *cp;
1.94 markus 1999: FILE *f;
1.229 dtucker 2000: int lineno = 0;
1.81 stevesk 2001:
1.134 djm 2002: debug2("%s: filename %s", __func__, filename);
2003: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2004: perror(filename);
2005: exit(1);
2006: }
1.134 djm 2007: buffer_clear(conf);
2008: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 2009: lineno++;
2010: if (strlen(line) == sizeof(line) - 1)
2011: fatal("%s line %d too long", filename, lineno);
1.134 djm 2012: /*
2013: * Trim out comments and strip whitespace
1.135 deraadt 2014: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2015: * line numbers later for error messages
2016: */
2017: if ((cp = strchr(line, '#')) != NULL)
2018: memcpy(cp, "\n", 2);
2019: cp = line + strspn(line, " \t\r");
2020:
2021: buffer_append(conf, cp, strlen(cp));
2022: }
2023: buffer_append(conf, "\0", 1);
2024: fclose(f);
2025: debug2("%s: done config len = %d", __func__, buffer_len(conf));
2026: }
2027:
2028: void
1.226 dtucker 2029: parse_server_match_config(ServerOptions *options,
2030: struct connection_info *connectinfo)
1.153 dtucker 2031: {
2032: ServerOptions mo;
2033:
2034: initialize_server_options(&mo);
1.226 dtucker 2035: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 2036: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2037: }
2038:
1.226 dtucker 2039: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2040: {
2041: char *p;
2042:
2043: while ((p = strsep(&spec, ",")) && *p != '\0') {
2044: if (strncmp(p, "addr=", 5) == 0) {
2045: ci->address = xstrdup(p + 5);
2046: } else if (strncmp(p, "host=", 5) == 0) {
2047: ci->host = xstrdup(p + 5);
2048: } else if (strncmp(p, "user=", 5) == 0) {
2049: ci->user = xstrdup(p + 5);
2050: } else if (strncmp(p, "laddr=", 6) == 0) {
2051: ci->laddress = xstrdup(p + 6);
1.317 djm 2052: } else if (strncmp(p, "rdomain=", 8) == 0) {
2053: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2054: } else if (strncmp(p, "lport=", 6) == 0) {
2055: ci->lport = a2port(p + 6);
2056: if (ci->lport == -1) {
2057: fprintf(stderr, "Invalid port '%s' in test mode"
2058: " specification %s\n", p+6, p);
2059: return -1;
2060: }
2061: } else {
2062: fprintf(stderr, "Invalid test mode specification %s\n",
2063: p);
2064: return -1;
2065: }
2066: }
2067: return 0;
2068: }
2069:
1.168 dtucker 2070: /*
2071: * Copy any supported values that are set.
2072: *
1.195 jj 2073: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2074: * array values that are not used pre-authentication, because any that we
2075: * do use must be explictly sent in mm_getpwnamallow().
2076: */
1.153 dtucker 2077: void
1.168 dtucker 2078: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2079: {
1.247 djm 2080: #define M_CP_INTOPT(n) do {\
2081: if (src->n != -1) \
2082: dst->n = src->n; \
2083: } while (0)
2084:
1.168 dtucker 2085: M_CP_INTOPT(password_authentication);
2086: M_CP_INTOPT(gss_authentication);
2087: M_CP_INTOPT(pubkey_authentication);
2088: M_CP_INTOPT(kerberos_authentication);
2089: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2090: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2091: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2092: M_CP_INTOPT(permit_root_login);
1.188 djm 2093: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 2094:
2095: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2096: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2097: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2098: M_CP_INTOPT(disable_forwarding);
1.309 djm 2099: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2100: M_CP_INTOPT(permit_tun);
1.251 millert 2101: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2102: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2103: M_CP_INTOPT(x11_display_offset);
2104: M_CP_INTOPT(x11_forwarding);
2105: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2106: M_CP_INTOPT(permit_tty);
1.250 djm 2107: M_CP_INTOPT(permit_user_rc);
1.180 djm 2108: M_CP_INTOPT(max_sessions);
1.184 dtucker 2109: M_CP_INTOPT(max_authtries);
1.300 markus 2110: M_CP_INTOPT(client_alive_count_max);
2111: M_CP_INTOPT(client_alive_interval);
1.213 djm 2112: M_CP_INTOPT(ip_qos_interactive);
2113: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2114: M_CP_INTOPT(rekey_limit);
2115: M_CP_INTOPT(rekey_interval);
1.308 djm 2116: M_CP_INTOPT(log_level);
1.289 djm 2117:
2118: /*
2119: * The bind_mask is a mode_t that may be unsigned, so we can't use
2120: * M_CP_INTOPT - it does a signed comparison that causes compiler
2121: * warnings.
2122: */
1.290 dtucker 2123: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2124: dst->fwd_opts.streamlocal_bind_mask =
2125: src->fwd_opts.streamlocal_bind_mask;
2126: }
1.247 djm 2127:
2128: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2129: #define M_CP_STROPT(n) do {\
2130: if (src->n != NULL && dst->n != src->n) { \
2131: free(dst->n); \
2132: dst->n = src->n; \
2133: } \
2134: } while(0)
1.314 djm 2135: #define M_CP_STRARRAYOPT(s, num_s) do {\
2136: u_int i; \
2137: if (src->num_s != 0) { \
2138: for (i = 0; i < dst->num_s; i++) \
2139: free(dst->s[i]); \
2140: free(dst->s); \
2141: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2142: for (i = 0; i < src->num_s; i++) \
2143: dst->s[i] = xstrdup(src->s[i]); \
2144: dst->num_s = src->num_s; \
1.312 djm 2145: } \
2146: } while(0)
1.168 dtucker 2147:
1.218 djm 2148: /* See comment in servconf.h */
2149: COPY_MATCH_STRING_OPTS();
1.282 djm 2150:
2151: /* Arguments that accept '+...' need to be expanded */
2152: assemble_algorithms(dst);
1.216 djm 2153:
1.217 dtucker 2154: /*
2155: * The only things that should be below this point are string options
2156: * which are only used after authentication.
2157: */
1.168 dtucker 2158: if (preauth)
2159: return;
1.219 djm 2160:
1.283 djm 2161: /* These options may be "none" to clear a global setting */
1.168 dtucker 2162: M_CP_STROPT(adm_forced_command);
1.283 djm 2163: if (option_clear_or_none(dst->adm_forced_command)) {
2164: free(dst->adm_forced_command);
2165: dst->adm_forced_command = NULL;
2166: }
1.176 djm 2167: M_CP_STROPT(chroot_directory);
1.283 djm 2168: if (option_clear_or_none(dst->chroot_directory)) {
2169: free(dst->chroot_directory);
2170: dst->chroot_directory = NULL;
2171: }
1.153 dtucker 2172: }
1.168 dtucker 2173:
2174: #undef M_CP_INTOPT
2175: #undef M_CP_STROPT
1.219 djm 2176: #undef M_CP_STRARRAYOPT
1.153 dtucker 2177:
2178: void
2179: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 2180: struct connection_info *connectinfo)
1.134 djm 2181: {
1.153 dtucker 2182: int active, linenum, bad_options = 0;
1.136 dtucker 2183: char *cp, *obuf, *cbuf;
1.134 djm 2184:
2185: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
2186:
1.287 djm 2187: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2188: fatal("%s: sshbuf_dup_string failed", __func__);
1.226 dtucker 2189: active = connectinfo ? 0 : 1;
1.137 dtucker 2190: linenum = 1;
1.140 deraadt 2191: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 2192: if (process_server_config_line(options, cp, filename,
1.226 dtucker 2193: linenum++, &active, connectinfo) != 0)
1.94 markus 2194: bad_options++;
1.1 deraadt 2195: }
1.239 djm 2196: free(obuf);
1.78 stevesk 2197: if (bad_options > 0)
2198: fatal("%s: terminating, %d bad configuration options",
2199: filename, bad_options);
1.266 dtucker 2200: process_queued_listen_addrs(options);
1.182 dtucker 2201: }
2202:
2203: static const char *
1.221 djm 2204: fmt_multistate_int(int val, const struct multistate *m)
2205: {
2206: u_int i;
2207:
2208: for (i = 0; m[i].key != NULL; i++) {
2209: if (m[i].value == val)
2210: return m[i].key;
2211: }
2212: return "UNKNOWN";
2213: }
2214:
2215: static const char *
1.182 dtucker 2216: fmt_intarg(ServerOpCodes code, int val)
2217: {
1.221 djm 2218: if (val == -1)
2219: return "unset";
2220: switch (code) {
2221: case sAddressFamily:
2222: return fmt_multistate_int(val, multistate_addressfamily);
2223: case sPermitRootLogin:
2224: return fmt_multistate_int(val, multistate_permitrootlogin);
2225: case sGatewayPorts:
2226: return fmt_multistate_int(val, multistate_gatewayports);
2227: case sCompression:
2228: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2229: case sAllowTcpForwarding:
2230: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2231: case sAllowStreamLocalForwarding:
2232: return fmt_multistate_int(val, multistate_tcpfwd);
1.256 djm 2233: case sFingerprintHash:
2234: return ssh_digest_alg_name(val);
1.221 djm 2235: default:
2236: switch (val) {
2237: case 0:
2238: return "no";
2239: case 1:
2240: return "yes";
2241: default:
2242: return "UNKNOWN";
2243: }
1.182 dtucker 2244: }
2245: }
2246:
2247: static const char *
2248: lookup_opcode_name(ServerOpCodes code)
2249: {
2250: u_int i;
2251:
2252: for (i = 0; keywords[i].name != NULL; i++)
2253: if (keywords[i].opcode == code)
2254: return(keywords[i].name);
2255: return "UNKNOWN";
2256: }
2257:
2258: static void
2259: dump_cfg_int(ServerOpCodes code, int val)
2260: {
2261: printf("%s %d\n", lookup_opcode_name(code), val);
2262: }
2263:
2264: static void
1.263 dtucker 2265: dump_cfg_oct(ServerOpCodes code, int val)
2266: {
2267: printf("%s 0%o\n", lookup_opcode_name(code), val);
2268: }
2269:
2270: static void
1.182 dtucker 2271: dump_cfg_fmtint(ServerOpCodes code, int val)
2272: {
2273: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2274: }
2275:
2276: static void
2277: dump_cfg_string(ServerOpCodes code, const char *val)
2278: {
1.257 djm 2279: printf("%s %s\n", lookup_opcode_name(code),
2280: val == NULL ? "none" : val);
1.182 dtucker 2281: }
2282:
2283: static void
2284: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2285: {
2286: u_int i;
2287:
2288: for (i = 0; i < count; i++)
1.219 djm 2289: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2290: }
2291:
2292: static void
2293: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2294: {
2295: u_int i;
2296:
1.291 djm 2297: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2298: return;
1.219 djm 2299: printf("%s", lookup_opcode_name(code));
2300: for (i = 0; i < count; i++)
2301: printf(" %s", vals[i]);
1.291 djm 2302: if (code == sAuthenticationMethods && count == 0)
2303: printf(" any");
1.219 djm 2304: printf("\n");
1.182 dtucker 2305: }
2306:
1.315 djm 2307: static char *
2308: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2309: {
1.315 djm 2310: int r;
1.182 dtucker 2311: struct addrinfo *ai;
1.315 djm 2312: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2313: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2314:
1.263 dtucker 2315: /*
2316: * ListenAddress must be after Port. add_one_listen_addr pushes
2317: * addresses onto a stack, so to maintain ordering we need to
2318: * print these in reverse order.
2319: */
1.315 djm 2320: for (ai = la->addrs; ai; ai = ai->ai_next) {
2321: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2322: sizeof(addr), port, sizeof(port),
2323: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2324: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2325: continue;
2326: }
2327: laddr2 = laddr1;
2328: if (ai->ai_family == AF_INET6) {
2329: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2330: addr, port,
2331: la->rdomain == NULL ? "" : " rdomain ",
2332: la->rdomain == NULL ? "" : la->rdomain,
2333: laddr2);
1.182 dtucker 2334: } else {
1.315 djm 2335: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2336: addr, port,
2337: la->rdomain == NULL ? "" : " rdomain ",
2338: la->rdomain == NULL ? "" : la->rdomain,
2339: laddr2);
1.182 dtucker 2340: }
1.315 djm 2341: free(laddr2);
2342: }
2343: return laddr1;
2344: }
2345:
2346: void
2347: dump_config(ServerOptions *o)
2348: {
2349: char *s;
2350: u_int i;
2351:
2352: /* these are usually at the top of the config */
2353: for (i = 0; i < o->num_ports; i++)
2354: printf("port %d\n", o->ports[i]);
2355: dump_cfg_fmtint(sAddressFamily, o->address_family);
2356:
2357: for (i = 0; i < o->num_listen_addrs; i++) {
2358: s = format_listen_addrs(&o->listen_addrs[i]);
2359: printf("%s", s);
2360: free(s);
1.182 dtucker 2361: }
2362:
2363: /* integer arguments */
2364: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2365: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2366: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2367: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2368: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2369: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2370: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2371:
2372: /* formatted integer arguments */
2373: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2374: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2375: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2376: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2377: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2378: o->hostbased_uses_name_from_packet_only);
2379: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2380: #ifdef KRB5
1.182 dtucker 2381: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2382: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2383: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2384: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2385: #endif
2386: #ifdef GSSAPI
1.182 dtucker 2387: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2388: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2389: #endif
1.182 dtucker 2390: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2391: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2392: o->kbd_interactive_authentication);
2393: dump_cfg_fmtint(sChallengeResponseAuthentication,
2394: o->challenge_response_authentication);
2395: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2396: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2397: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2398: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2399: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2400: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2401: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2402: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2403: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2404: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2405: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2406: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2407: dump_cfg_fmtint(sUseDNS, o->use_dns);
2408: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2409: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2410: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2411: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2412: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2413: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2414: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2415:
2416: /* string arguments */
2417: dump_cfg_string(sPidFile, o->pid_file);
2418: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.252 djm 2419: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
2420: dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
1.182 dtucker 2421: dump_cfg_string(sBanner, o->banner);
2422: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2423: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2424: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2425: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 2426: dump_cfg_string(sAuthorizedPrincipalsFile,
2427: o->authorized_principals_file);
1.261 dtucker 2428: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2429: ? "none" : o->version_addendum);
1.231 djm 2430: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2431: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2432: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2433: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2434: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.252 djm 2435: dump_cfg_string(sKexAlgorithms,
1.253 djm 2436: o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
1.258 djm 2437: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
2438: o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
1.276 markus 2439: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
2440: o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG);
1.258 djm 2441: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ?
2442: o->pubkey_key_types : KEX_DEFAULT_PK_ALG);
1.316 djm 2443: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2444:
2445: /* string arguments requiring a lookup */
2446: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2447: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2448:
2449: /* string array arguments */
1.219 djm 2450: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2451: o->authorized_keys_files);
1.182 dtucker 2452: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2453: o->host_key_files);
1.261 dtucker 2454: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2455: o->host_cert_files);
1.182 dtucker 2456: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2457: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2458: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2459: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2460: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2461: dump_cfg_strarray_oneline(sAuthenticationMethods,
2462: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2463:
2464: /* other arguments */
2465: for (i = 0; i < o->num_subsystems; i++)
2466: printf("subsystem %s %s\n", o->subsystem_name[i],
2467: o->subsystem_args[i]);
2468:
2469: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2470: o->max_startups_rate, o->max_startups);
2471:
1.318 djm 2472: s = NULL;
2473: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2474: if (tunmode_desc[i].val == o->permit_tun) {
2475: s = tunmode_desc[i].text;
2476: break;
2477: }
1.318 djm 2478: }
1.182 dtucker 2479: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2480:
1.214 stevesk 2481: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2482: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2483:
1.284 dtucker 2484: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2485: o->rekey_interval);
1.182 dtucker 2486:
1.310 djm 2487: printf("permitopen");
2488: if (o->num_permitted_opens == 0)
2489: printf(" any");
2490: else {
2491: for (i = 0; i < o->num_permitted_opens; i++)
2492: printf(" %s", o->permitted_opens[i]);
2493: }
2494: printf("\n");
1.1 deraadt 2495: }
![[BACK]](/icons/back.gif){kind=icon}
Return to servconf.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh