Annotation of src/usr.bin/ssh/servconf.c, Revision 1.329
1.226 dtucker 1:
1.329 ! djm 2: /* $OpenBSD: servconf.c,v 1.328 2018/04/10 00:10:49 djm Exp $ */
1.1 deraadt 3: /*
1.26 deraadt 4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.34 markus 6: *
1.51 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 12: */
1.1 deraadt 13:
1.152 stevesk 14: #include <sys/types.h>
15: #include <sys/socket.h>
1.179 djm 16: #include <sys/queue.h>
1.315 djm 17: #include <sys/sysctl.h>
1.154 stevesk 18:
1.213 djm 19: #include <netinet/in.h>
20: #include <netinet/ip.h>
1.315 djm 21: #include <net/route.h>
1.213 djm 22:
1.235 dtucker 23: #include <ctype.h>
1.154 stevesk 24: #include <netdb.h>
1.165 dtucker 25: #include <pwd.h>
1.162 stevesk 26: #include <stdio.h>
1.161 stevesk 27: #include <stdlib.h>
1.160 stevesk 28: #include <string.h>
1.164 deraadt 29: #include <signal.h>
1.155 stevesk 30: #include <unistd.h>
1.259 deraadt 31: #include <limits.h>
1.164 deraadt 32: #include <stdarg.h>
1.182 dtucker 33: #include <errno.h>
1.236 dtucker 34: #include <util.h>
1.1 deraadt 35:
1.164 deraadt 36: #include "xmalloc.h"
1.1 deraadt 37: #include "ssh.h"
1.62 markus 38: #include "log.h"
1.164 deraadt 39: #include "buffer.h"
1.251 millert 40: #include "misc.h"
1.1 deraadt 41: #include "servconf.h"
1.33 markus 42: #include "compat.h"
1.60 markus 43: #include "pathnames.h"
1.62 markus 44: #include "cipher.h"
1.164 deraadt 45: #include "key.h"
1.66 markus 46: #include "kex.h"
47: #include "mac.h"
1.153 dtucker 48: #include "match.h"
1.156 dtucker 49: #include "channels.h"
1.165 dtucker 50: #include "groupaccess.h"
1.226 dtucker 51: #include "canohost.h"
52: #include "packet.h"
1.232 djm 53: #include "hostfile.h"
54: #include "auth.h"
1.252 djm 55: #include "myproposal.h"
1.256 djm 56: #include "digest.h"
1.1 deraadt 57:
1.315 djm 58: static void add_listen_addr(ServerOptions *, const char *,
59: const char *, int);
60: static void add_one_listen_addr(ServerOptions *, const char *,
61: const char *, int);
1.29 markus 62:
1.102 provos 63: /* Use of privilege separation or not */
64: extern int use_privsep;
1.153 dtucker 65: extern Buffer cfg;
1.62 markus 66:
1.1 deraadt 67: /* Initializes the server options to their default values. */
68:
1.34 markus 69: void
1.25 markus 70: initialize_server_options(ServerOptions *options)
1.1 deraadt 71: {
1.25 markus 72: memset(options, 0, sizeof(*options));
1.29 markus 73: options->num_ports = 0;
74: options->ports_from_cmdline = 0;
1.266 dtucker 75: options->queued_listen_addrs = NULL;
76: options->num_queued_listens = 0;
1.29 markus 77: options->listen_addrs = NULL;
1.315 djm 78: options->num_listen_addrs = 0;
1.138 djm 79: options->address_family = -1;
1.316 djm 80: options->routing_domain = NULL;
1.54 markus 81: options->num_host_key_files = 0;
1.203 djm 82: options->num_host_cert_files = 0;
1.240 markus 83: options->host_key_agent = NULL;
1.36 markus 84: options->pid_file = NULL;
1.25 markus 85: options->login_grace_time = -1;
1.279 chris 86: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 87: options->ignore_rhosts = -1;
88: options->ignore_user_known_hosts = -1;
89: options->print_motd = -1;
1.72 stevesk 90: options->print_lastlog = -1;
1.25 markus 91: options->x11_forwarding = -1;
92: options->x11_display_offset = -1;
1.99 stevesk 93: options->x11_use_localhost = -1;
1.244 djm 94: options->permit_tty = -1;
1.250 djm 95: options->permit_user_rc = -1;
1.42 markus 96: options->xauth_location = NULL;
1.25 markus 97: options->strict_modes = -1;
1.129 markus 98: options->tcp_keep_alive = -1;
1.101 markus 99: options->log_facility = SYSLOG_FACILITY_NOT_SET;
100: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.75 markus 101: options->hostbased_authentication = -1;
102: options->hostbased_uses_name_from_packet_only = -1;
1.258 djm 103: options->hostbased_key_types = NULL;
1.276 markus 104: options->hostkeyalgorithms = NULL;
1.54 markus 105: options->pubkey_authentication = -1;
1.258 djm 106: options->pubkey_key_types = NULL;
1.25 markus 107: options->kerberos_authentication = -1;
108: options->kerberos_or_local_passwd = -1;
109: options->kerberos_ticket_cleanup = -1;
1.130 jakob 110: options->kerberos_get_afs_token = -1;
1.125 markus 111: options->gss_authentication=-1;
112: options->gss_cleanup_creds = -1;
1.271 djm 113: options->gss_strict_acceptor = -1;
1.25 markus 114: options->password_authentication = -1;
1.52 markus 115: options->kbd_interactive_authentication = -1;
1.80 markus 116: options->challenge_response_authentication = -1;
1.25 markus 117: options->permit_empty_passwd = -1;
1.113 markus 118: options->permit_user_env = -1;
1.111 markus 119: options->compression = -1;
1.235 dtucker 120: options->rekey_limit = -1;
121: options->rekey_interval = -1;
1.53 markus 122: options->allow_tcp_forwarding = -1;
1.251 millert 123: options->allow_streamlocal_forwarding = -1;
1.178 pyr 124: options->allow_agent_forwarding = -1;
1.25 markus 125: options->num_allow_users = 0;
126: options->num_deny_users = 0;
127: options->num_allow_groups = 0;
128: options->num_deny_groups = 0;
1.33 markus 129: options->ciphers = NULL;
1.66 markus 130: options->macs = NULL;
1.211 djm 131: options->kex_algorithms = NULL;
1.251 millert 132: options->fwd_opts.gateway_ports = -1;
133: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
134: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 135: options->num_subsystems = 0;
1.50 markus 136: options->max_startups_begin = -1;
137: options->max_startups_rate = -1;
1.46 markus 138: options->max_startups = -1;
1.133 dtucker 139: options->max_authtries = -1;
1.180 djm 140: options->max_sessions = -1;
1.57 markus 141: options->banner = NULL;
1.122 markus 142: options->use_dns = -1;
1.77 beck 143: options->client_alive_interval = -1;
144: options->client_alive_count_max = -1;
1.219 djm 145: options->num_authkeys_files = 0;
1.131 djm 146: options->num_accept_env = 0;
1.145 reyk 147: options->permit_tun = -1;
1.310 djm 148: options->permitted_opens = NULL;
1.329 ! djm 149: options->permitted_remote_opens = NULL;
1.158 dtucker 150: options->adm_forced_command = NULL;
1.176 djm 151: options->chroot_directory = NULL;
1.231 djm 152: options->authorized_keys_command = NULL;
153: options->authorized_keys_command_user = NULL;
1.204 djm 154: options->revoked_keys_file = NULL;
155: options->trusted_user_ca_keys = NULL;
1.208 djm 156: options->authorized_principals_file = NULL;
1.270 djm 157: options->authorized_principals_command = NULL;
158: options->authorized_principals_command_user = NULL;
1.213 djm 159: options->ip_qos_interactive = -1;
160: options->ip_qos_bulk = -1;
1.225 djm 161: options->version_addendum = NULL;
1.256 djm 162: options->fingerprint_hash = -1;
1.301 djm 163: options->disable_forwarding = -1;
1.309 djm 164: options->expose_userauth_info = -1;
1.1 deraadt 165: }
166:
1.257 djm 167: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
168: static int
169: option_clear_or_none(const char *o)
170: {
171: return o == NULL || strcasecmp(o, "none") == 0;
172: }
173:
1.282 djm 174: static void
175: assemble_algorithms(ServerOptions *o)
176: {
177: if (kex_assemble_names(KEX_SERVER_ENCRYPT, &o->ciphers) != 0 ||
178: kex_assemble_names(KEX_SERVER_MAC, &o->macs) != 0 ||
179: kex_assemble_names(KEX_SERVER_KEX, &o->kex_algorithms) != 0 ||
180: kex_assemble_names(KEX_DEFAULT_PK_ALG,
181: &o->hostkeyalgorithms) != 0 ||
182: kex_assemble_names(KEX_DEFAULT_PK_ALG,
183: &o->hostbased_key_types) != 0 ||
184: kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->pubkey_key_types) != 0)
185: fatal("kex_assemble_names failed");
186: }
187:
1.314 djm 188: static void
189: array_append(const char *file, const int line, const char *directive,
190: char ***array, u_int *lp, const char *s)
191: {
192:
193: if (*lp >= INT_MAX)
194: fatal("%s line %d: Too many %s entries", file, line, directive);
195:
196: *array = xrecallocarray(*array, *lp, *lp + 1, sizeof(**array));
197: (*array)[*lp] = xstrdup(s);
198: (*lp)++;
199: }
200:
201: void
202: servconf_add_hostkey(const char *file, const int line,
203: ServerOptions *options, const char *path)
204: {
205: char *apath = derelativise_path(path);
206:
207: array_append(file, line, "HostKey",
208: &options->host_key_files, &options->num_host_key_files, apath);
209: free(apath);
210: }
211:
212: void
213: servconf_add_hostcert(const char *file, const int line,
214: ServerOptions *options, const char *path)
215: {
216: char *apath = derelativise_path(path);
217:
218: array_append(file, line, "HostCertificate",
219: &options->host_cert_files, &options->num_host_cert_files, apath);
220: free(apath);
221: }
222:
1.34 markus 223: void
1.25 markus 224: fill_default_server_options(ServerOptions *options)
1.1 deraadt 225: {
1.314 djm 226: u_int i;
1.257 djm 227:
1.54 markus 228: if (options->num_host_key_files == 0) {
1.293 naddy 229: /* fill default hostkeys */
1.314 djm 230: servconf_add_hostkey("[default]", 0, options,
231: _PATH_HOST_RSA_KEY_FILE);
232: servconf_add_hostkey("[default]", 0, options,
233: _PATH_HOST_ECDSA_KEY_FILE);
234: servconf_add_hostkey("[default]", 0, options,
235: _PATH_HOST_ED25519_KEY_FILE);
1.326 markus 236: #ifdef WITH_XMSS
1.325 markus 237: servconf_add_hostkey("[default]", 0, options,
238: _PATH_HOST_XMSS_KEY_FILE);
1.326 markus 239: #endif /* WITH_XMSS */
1.54 markus 240: }
1.203 djm 241: /* No certificates by default */
1.29 markus 242: if (options->num_ports == 0)
243: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 244: if (options->address_family == -1)
245: options->address_family = AF_UNSPEC;
1.29 markus 246: if (options->listen_addrs == NULL)
1.315 djm 247: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 248: if (options->pid_file == NULL)
1.257 djm 249: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 250: if (options->login_grace_time == -1)
1.115 stevesk 251: options->login_grace_time = 120;
1.67 markus 252: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 253: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 254: if (options->ignore_rhosts == -1)
1.30 markus 255: options->ignore_rhosts = 1;
1.25 markus 256: if (options->ignore_user_known_hosts == -1)
257: options->ignore_user_known_hosts = 0;
258: if (options->print_motd == -1)
259: options->print_motd = 1;
1.72 stevesk 260: if (options->print_lastlog == -1)
261: options->print_lastlog = 1;
1.25 markus 262: if (options->x11_forwarding == -1)
1.30 markus 263: options->x11_forwarding = 0;
1.25 markus 264: if (options->x11_display_offset == -1)
1.30 markus 265: options->x11_display_offset = 10;
1.99 stevesk 266: if (options->x11_use_localhost == -1)
267: options->x11_use_localhost = 1;
1.42 markus 268: if (options->xauth_location == NULL)
1.257 djm 269: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 270: if (options->permit_tty == -1)
271: options->permit_tty = 1;
1.250 djm 272: if (options->permit_user_rc == -1)
273: options->permit_user_rc = 1;
1.25 markus 274: if (options->strict_modes == -1)
275: options->strict_modes = 1;
1.129 markus 276: if (options->tcp_keep_alive == -1)
277: options->tcp_keep_alive = 1;
1.101 markus 278: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 279: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 280: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 281: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 282: if (options->hostbased_authentication == -1)
283: options->hostbased_authentication = 0;
284: if (options->hostbased_uses_name_from_packet_only == -1)
285: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 286: if (options->pubkey_authentication == -1)
287: options->pubkey_authentication = 1;
1.25 markus 288: if (options->kerberos_authentication == -1)
1.107 markus 289: options->kerberos_authentication = 0;
1.25 markus 290: if (options->kerberos_or_local_passwd == -1)
291: options->kerberos_or_local_passwd = 1;
292: if (options->kerberos_ticket_cleanup == -1)
293: options->kerberos_ticket_cleanup = 1;
1.130 jakob 294: if (options->kerberos_get_afs_token == -1)
295: options->kerberos_get_afs_token = 0;
1.125 markus 296: if (options->gss_authentication == -1)
297: options->gss_authentication = 0;
298: if (options->gss_cleanup_creds == -1)
299: options->gss_cleanup_creds = 1;
1.271 djm 300: if (options->gss_strict_acceptor == -1)
1.302 djm 301: options->gss_strict_acceptor = 1;
1.25 markus 302: if (options->password_authentication == -1)
303: options->password_authentication = 1;
1.52 markus 304: if (options->kbd_interactive_authentication == -1)
305: options->kbd_interactive_authentication = 0;
1.80 markus 306: if (options->challenge_response_authentication == -1)
307: options->challenge_response_authentication = 1;
1.25 markus 308: if (options->permit_empty_passwd == -1)
1.30 markus 309: options->permit_empty_passwd = 0;
1.113 markus 310: if (options->permit_user_env == -1)
311: options->permit_user_env = 0;
1.111 markus 312: if (options->compression == -1)
1.143 markus 313: options->compression = COMP_DELAYED;
1.235 dtucker 314: if (options->rekey_limit == -1)
315: options->rekey_limit = 0;
316: if (options->rekey_interval == -1)
317: options->rekey_interval = 0;
1.53 markus 318: if (options->allow_tcp_forwarding == -1)
1.233 djm 319: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 320: if (options->allow_streamlocal_forwarding == -1)
321: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 322: if (options->allow_agent_forwarding == -1)
323: options->allow_agent_forwarding = 1;
1.251 millert 324: if (options->fwd_opts.gateway_ports == -1)
325: options->fwd_opts.gateway_ports = 0;
1.46 markus 326: if (options->max_startups == -1)
1.234 dtucker 327: options->max_startups = 100;
1.50 markus 328: if (options->max_startups_rate == -1)
1.234 dtucker 329: options->max_startups_rate = 30; /* 30% */
1.50 markus 330: if (options->max_startups_begin == -1)
1.234 dtucker 331: options->max_startups_begin = 10;
1.133 dtucker 332: if (options->max_authtries == -1)
333: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 334: if (options->max_sessions == -1)
335: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 336: if (options->use_dns == -1)
1.260 deraadt 337: options->use_dns = 0;
1.77 beck 338: if (options->client_alive_interval == -1)
1.95 deraadt 339: options->client_alive_interval = 0;
1.77 beck 340: if (options->client_alive_count_max == -1)
341: options->client_alive_count_max = 3;
1.219 djm 342: if (options->num_authkeys_files == 0) {
1.314 djm 343: array_append("[default]", 0, "AuthorizedKeysFiles",
344: &options->authorized_keys_files,
345: &options->num_authkeys_files,
346: _PATH_SSH_USER_PERMITTED_KEYS);
347: array_append("[default]", 0, "AuthorizedKeysFiles",
348: &options->authorized_keys_files,
349: &options->num_authkeys_files,
350: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 351: }
1.145 reyk 352: if (options->permit_tun == -1)
1.146 reyk 353: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 354: if (options->ip_qos_interactive == -1)
1.327 job 355: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 356: if (options->ip_qos_bulk == -1)
1.327 job 357: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 358: if (options->version_addendum == NULL)
359: options->version_addendum = xstrdup("");
1.251 millert 360: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
361: options->fwd_opts.streamlocal_bind_mask = 0177;
362: if (options->fwd_opts.streamlocal_bind_unlink == -1)
363: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 364: if (options->fingerprint_hash == -1)
365: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 366: if (options->disable_forwarding == -1)
367: options->disable_forwarding = 0;
1.309 djm 368: if (options->expose_userauth_info == -1)
369: options->expose_userauth_info = 0;
1.277 djm 370:
1.282 djm 371: assemble_algorithms(options);
1.277 djm 372:
1.285 djm 373: /* Turn privilege separation and sandboxing on by default */
1.102 provos 374: if (use_privsep == -1)
1.285 djm 375: use_privsep = PRIVSEP_ON;
1.257 djm 376:
377: #define CLEAR_ON_NONE(v) \
378: do { \
379: if (option_clear_or_none(v)) { \
380: free(v); \
381: v = NULL; \
382: } \
383: } while(0)
384: CLEAR_ON_NONE(options->pid_file);
385: CLEAR_ON_NONE(options->xauth_location);
386: CLEAR_ON_NONE(options->banner);
387: CLEAR_ON_NONE(options->trusted_user_ca_keys);
388: CLEAR_ON_NONE(options->revoked_keys_file);
1.267 djm 389: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 390: CLEAR_ON_NONE(options->adm_forced_command);
391: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 392: CLEAR_ON_NONE(options->routing_domain);
1.257 djm 393: for (i = 0; i < options->num_host_key_files; i++)
394: CLEAR_ON_NONE(options->host_key_files[i]);
395: for (i = 0; i < options->num_host_cert_files; i++)
396: CLEAR_ON_NONE(options->host_cert_files[i]);
397: #undef CLEAR_ON_NONE
1.291 djm 398:
399: /* Similar handling for AuthenticationMethods=any */
400: if (options->num_auth_methods == 1 &&
401: strcmp(options->auth_methods[0], "any") == 0) {
402: free(options->auth_methods[0]);
403: options->auth_methods[0] = NULL;
404: options->num_auth_methods = 0;
405: }
406:
1.1 deraadt 407: }
408:
409: /* Keyword tokens. */
1.25 markus 410: typedef enum {
411: sBadOption, /* == unknown option */
1.293 naddy 412: sPort, sHostKeyFile, sLoginGraceTime,
413: sPermitRootLogin, sLogFacility, sLogLevel,
1.25 markus 414: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 415: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 416: sPasswordAuthentication, sKbdInteractiveAuthentication,
417: sListenAddress, sAddressFamily,
1.72 stevesk 418: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 419: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 420: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 421: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 422: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 423: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 424: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
425: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 426: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 427: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 428: sHostKeyAlgorithms,
1.258 djm 429: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 430: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
431: sAcceptEnv, sPermitTunnel,
1.329 ! djm 432: sMatch, sPermitOpen, sPermitRemoteOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 433: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.249 djm 434: sHostCertificate,
1.208 djm 435: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 436: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.225 djm 437: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 438: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 439: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 440: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 441: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.316 djm 442: sExposeAuthInfo, sRDomain,
1.295 djm 443: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 444: } ServerOpCodes;
445:
1.153 dtucker 446: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
447: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
448: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
449:
1.1 deraadt 450: /* Textual representation of the tokens. */
1.25 markus 451: static struct {
452: const char *name;
453: ServerOpCodes opcode;
1.153 dtucker 454: u_int flags;
1.25 markus 455: } keywords[] = {
1.153 dtucker 456: { "port", sPort, SSHCFG_GLOBAL },
457: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
458: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 459: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 460: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 461: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 462: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 463: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 464: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 465: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 466: { "loglevel", sLogLevel, SSHCFG_ALL },
1.153 dtucker 467: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 468: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 469: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 470: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 471: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 472: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 473: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 474: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 475: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.153 dtucker 476: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 477: #ifdef KRB5
1.168 dtucker 478: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 479: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
480: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
481: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 482: #else
1.168 dtucker 483: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 484: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
485: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
486: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 487: #endif
1.153 dtucker 488: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
489: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 490: #ifdef GSSAPI
1.168 dtucker 491: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 492: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 493: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 494: #else
1.168 dtucker 495: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 496: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 497: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 498: #endif
1.168 dtucker 499: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
500: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 501: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 502: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
503: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
504: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
505: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
506: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
507: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
508: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
509: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 510: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
511: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
512: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 513: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
514: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 515: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 516: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 517: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 518: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 519: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 520: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
521: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
522: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 523: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 524: { "allowusers", sAllowUsers, SSHCFG_ALL },
525: { "denyusers", sDenyUsers, SSHCFG_ALL },
526: { "allowgroups", sAllowGroups, SSHCFG_ALL },
527: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 528: { "ciphers", sCiphers, SSHCFG_GLOBAL },
529: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 530: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 531: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
532: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
533: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 534: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 535: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 536: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 537: { "usedns", sUseDNS, SSHCFG_GLOBAL },
538: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
539: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 540: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
541: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 542: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 543: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 544: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 545: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 546: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 547: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 548: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 549: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 550: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.329 ! djm 551: { "permitremoteopen", sPermitRemoteOpen, SSHCFG_ALL },
1.158 dtucker 552: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 553: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 554: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 555: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
556: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 557: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 558: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 559: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 560: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
561: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 562: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
563: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 564: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 565: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 566: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
567: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
568: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 569: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 570: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 571: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 572: { "rdomain", sRDomain, SSHCFG_ALL },
1.153 dtucker 573: { NULL, sBadOption, 0 }
1.1 deraadt 574: };
575:
1.182 dtucker 576: static struct {
577: int val;
578: char *text;
579: } tunmode_desc[] = {
580: { SSH_TUNMODE_NO, "no" },
581: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
582: { SSH_TUNMODE_ETHERNET, "ethernet" },
583: { SSH_TUNMODE_YES, "yes" },
584: { -1, NULL }
585: };
586:
1.329 ! djm 587: /* Returns an opcode name from its number */
! 588:
! 589: static const char *
! 590: lookup_opcode_name(ServerOpCodes code)
! 591: {
! 592: u_int i;
! 593:
! 594: for (i = 0; keywords[i].name != NULL; i++)
! 595: if (keywords[i].opcode == code)
! 596: return(keywords[i].name);
! 597: return "UNKNOWN";
! 598: }
! 599:
! 600:
1.27 markus 601: /*
1.73 stevesk 602: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 603: */
1.1 deraadt 604:
1.34 markus 605: static ServerOpCodes
1.25 markus 606: parse_token(const char *cp, const char *filename,
1.153 dtucker 607: int linenum, u_int *flags)
1.1 deraadt 608: {
1.55 markus 609: u_int i;
1.1 deraadt 610:
1.25 markus 611: for (i = 0; keywords[i].name; i++)
1.153 dtucker 612: if (strcasecmp(cp, keywords[i].name) == 0) {
613: *flags = keywords[i].flags;
1.25 markus 614: return keywords[i].opcode;
1.153 dtucker 615: }
1.25 markus 616:
1.78 stevesk 617: error("%s: line %d: Bad configuration option: %s",
618: filename, linenum, cp);
1.25 markus 619: return sBadOption;
1.1 deraadt 620: }
621:
1.202 djm 622: char *
623: derelativise_path(const char *path)
624: {
1.259 deraadt 625: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 626:
1.257 djm 627: if (strcasecmp(path, "none") == 0)
628: return xstrdup("none");
1.202 djm 629: expanded = tilde_expand_filename(path, getuid());
630: if (*expanded == '/')
631: return expanded;
1.207 djm 632: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 633: fatal("%s: getcwd: %s", __func__, strerror(errno));
634: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 635: free(expanded);
1.202 djm 636: return ret;
637: }
638:
1.84 itojun 639: static void
1.315 djm 640: add_listen_addr(ServerOptions *options, const char *addr,
641: const char *rdomain, int port)
1.74 stevesk 642: {
1.142 djm 643: u_int i;
1.74 stevesk 644:
1.315 djm 645: if (port > 0)
646: add_one_listen_addr(options, addr, rdomain, port);
647: else {
648: for (i = 0; i < options->num_ports; i++) {
649: add_one_listen_addr(options, addr, rdomain,
650: options->ports[i]);
651: }
652: }
1.74 stevesk 653: }
654:
1.84 itojun 655: static void
1.315 djm 656: add_one_listen_addr(ServerOptions *options, const char *addr,
657: const char *rdomain, int port)
1.29 markus 658: {
659: struct addrinfo hints, *ai, *aitop;
660: char strport[NI_MAXSERV];
661: int gaierr;
1.315 djm 662: u_int i;
663:
664: /* Find listen_addrs entry for this rdomain */
665: for (i = 0; i < options->num_listen_addrs; i++) {
666: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
667: break;
668: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
669: continue;
670: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
671: break;
672: }
673: if (i >= options->num_listen_addrs) {
674: /* No entry for this rdomain; allocate one */
675: if (i >= INT_MAX)
676: fatal("%s: too many listen addresses", __func__);
677: options->listen_addrs = xrecallocarray(options->listen_addrs,
678: options->num_listen_addrs, options->num_listen_addrs + 1,
679: sizeof(*options->listen_addrs));
680: i = options->num_listen_addrs++;
681: if (rdomain != NULL)
682: options->listen_addrs[i].rdomain = xstrdup(rdomain);
683: }
684: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 685:
1.74 stevesk 686: memset(&hints, 0, sizeof(hints));
1.138 djm 687: hints.ai_family = options->address_family;
1.74 stevesk 688: hints.ai_socktype = SOCK_STREAM;
689: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 690: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 691: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
692: fatal("bad addr or host: %s (%s)",
693: addr ? addr : "<NULL>",
1.173 dtucker 694: ssh_gai_strerror(gaierr));
1.74 stevesk 695: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
696: ;
1.315 djm 697: ai->ai_next = options->listen_addrs[i].addrs;
698: options->listen_addrs[i].addrs = aitop;
699: }
700:
701: /* Returns nonzero if the routing domain name is valid */
702: static int
703: valid_rdomain(const char *name)
704: {
705: const char *errstr;
706: long long num;
707: struct rt_tableinfo info;
708: int mib[6];
709: size_t miblen = sizeof(mib);
710:
711: if (name == NULL)
712: return 1;
713:
714: num = strtonum(name, 0, 255, &errstr);
715: if (errstr != NULL)
716: return 0;
717:
718: /* Check whether the table actually exists */
719: memset(mib, 0, sizeof(mib));
720: mib[0] = CTL_NET;
721: mib[1] = PF_ROUTE;
722: mib[4] = NET_RT_TABLE;
723: mib[5] = (int)num;
724: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
725: return 0;
726:
727: return 1;
1.29 markus 728: }
729:
1.266 dtucker 730: /*
731: * Queue a ListenAddress to be processed once we have all of the Ports
732: * and AddressFamily options.
733: */
734: static void
1.315 djm 735: queue_listen_addr(ServerOptions *options, const char *addr,
736: const char *rdomain, int port)
1.266 dtucker 737: {
1.315 djm 738: struct queued_listenaddr *qla;
739:
740: options->queued_listen_addrs = xrecallocarray(
741: options->queued_listen_addrs,
742: options->num_queued_listens, options->num_queued_listens + 1,
743: sizeof(*options->queued_listen_addrs));
744: qla = &options->queued_listen_addrs[options->num_queued_listens++];
745: qla->addr = xstrdup(addr);
746: qla->port = port;
747: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 748: }
749:
750: /*
751: * Process queued (text) ListenAddress entries.
752: */
753: static void
754: process_queued_listen_addrs(ServerOptions *options)
755: {
756: u_int i;
1.315 djm 757: struct queued_listenaddr *qla;
1.266 dtucker 758:
759: if (options->num_ports == 0)
760: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
761: if (options->address_family == -1)
762: options->address_family = AF_UNSPEC;
763:
764: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 765: qla = &options->queued_listen_addrs[i];
766: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
767: free(qla->addr);
768: free(qla->rdomain);
1.266 dtucker 769: }
770: free(options->queued_listen_addrs);
771: options->queued_listen_addrs = NULL;
772: options->num_queued_listens = 0;
773: }
774:
1.310 djm 775: /*
1.329 ! djm 776: * Inform channels layer of permitopen options for a single forwarding
! 777: * direction (local/remote).
1.310 djm 778: */
1.329 ! djm 779: static void
! 780: process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
! 781: char **opens, u_int num_opens)
1.310 djm 782: {
783: u_int i;
784: int port;
785: char *host, *arg, *oarg;
1.329 ! djm 786: int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
! 787: const char *what = lookup_opcode_name(opcode);
1.310 djm 788:
1.329 ! djm 789: channel_clear_permission(ssh, FORWARD_ADM, where);
! 790: if (num_opens == 0)
1.310 djm 791: return; /* permit any */
792:
793: /* handle keywords: "any" / "none" */
1.329 ! djm 794: if (num_opens == 1 && strcmp(opens[0], "any") == 0)
1.310 djm 795: return;
1.329 ! djm 796: if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
! 797: channel_disable_admin(ssh, where);
1.310 djm 798: return;
799: }
800: /* Otherwise treat it as a list of permitted host:port */
1.329 ! djm 801: for (i = 0; i < num_opens; i++) {
! 802: oarg = arg = xstrdup(opens[i]);
1.310 djm 803: host = hpdelim(&arg);
804: if (host == NULL)
1.329 ! djm 805: fatal("%s: missing host in %s", __func__, what);
1.310 djm 806: host = cleanhostname(host);
807: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.329 ! djm 808: fatal("%s: bad port number in %s", __func__, what);
1.310 djm 809: /* Send it to channels layer */
1.329 ! djm 810: channel_add_permission(ssh, FORWARD_ADM,
! 811: where, host, port);
1.310 djm 812: free(oarg);
813: }
814: }
815:
1.329 ! djm 816: /*
! 817: * Inform channels layer of permitopen options from configuration.
! 818: */
! 819: void
! 820: process_permitopen(struct ssh *ssh, ServerOptions *options)
! 821: {
! 822: process_permitopen_list(ssh, sPermitOpen,
! 823: options->permitted_opens, options->num_permitted_opens);
! 824: process_permitopen_list(ssh, sPermitRemoteOpen,
! 825: options->permitted_remote_opens,
! 826: options->num_permitted_remote_opens);
! 827: }
! 828:
1.226 dtucker 829: struct connection_info *
830: get_connection_info(int populate, int use_dns)
831: {
1.286 djm 832: struct ssh *ssh = active_state; /* XXX */
1.226 dtucker 833: static struct connection_info ci;
834:
835: if (!populate)
836: return &ci;
1.286 djm 837: ci.host = auth_get_canonical_hostname(ssh, use_dns);
838: ci.address = ssh_remote_ipaddr(ssh);
839: ci.laddress = ssh_local_ipaddr(ssh);
840: ci.lport = ssh_local_port(ssh);
1.317 djm 841: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 842: return &ci;
843: }
844:
1.153 dtucker 845: /*
846: * The strategy for the Match blocks is that the config file is parsed twice.
847: *
848: * The first time is at startup. activep is initialized to 1 and the
849: * directives in the global context are processed and acted on. Hitting a
850: * Match directive unsets activep and the directives inside the block are
851: * checked for syntax only.
852: *
853: * The second time is after a connection has been established but before
854: * authentication. activep is initialized to 2 and global config directives
855: * are ignored since they have already been processed. If the criteria in a
856: * Match block is met, activep is set and the subsequent directives
857: * processed and actioned until EOF or another Match block unsets it. Any
858: * options set are copied into the main server config.
859: *
860: * Potential additions/improvements:
1.295 djm 861: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 862: *
863: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
864: * Match Address 192.168.0.*
865: * Tag trusted
866: * Match Group wheel
867: * Tag trusted
868: * Match Tag trusted
869: * AllowTcpForwarding yes
870: * GatewayPorts clientspecified
871: * [...]
872: *
873: * - Add a PermittedChannelRequests directive
874: * Match Group shell
875: * PermittedChannelRequests session,forwarded-tcpip
876: */
877:
878: static int
1.165 dtucker 879: match_cfg_line_group(const char *grps, int line, const char *user)
880: {
881: int result = 0;
882: struct passwd *pw;
883:
884: if (user == NULL)
885: goto out;
886:
887: if ((pw = getpwnam(user)) == NULL) {
888: debug("Can't match group at line %d because user %.100s does "
889: "not exist", line, user);
890: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
891: debug("Can't Match group because user %.100s not in any group "
892: "at line %d", user, line);
1.186 djm 893: } else if (ga_match_pattern_list(grps) != 1) {
894: debug("user %.100s does not match group list %.100s at line %d",
895: user, grps, line);
1.165 dtucker 896: } else {
1.186 djm 897: debug("user %.100s matched group list %.100s at line %d", user,
898: grps, line);
1.165 dtucker 899: result = 1;
900: }
901: out:
902: ga_free();
903: return result;
904: }
905:
1.319 dtucker 906: static void
907: match_test_missing_fatal(const char *criteria, const char *attrib)
908: {
909: fatal("'Match %s' in configuration but '%s' not in connection "
910: "test specification.", criteria, attrib);
911: }
912:
1.226 dtucker 913: /*
1.230 dtucker 914: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 915: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 916: * not match.
1.226 dtucker 917: */
1.165 dtucker 918: static int
1.226 dtucker 919: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 920: {
1.243 dtucker 921: int result = 1, attributes = 0, port;
1.153 dtucker 922: char *arg, *attrib, *cp = *condition;
923:
1.226 dtucker 924: if (ci == NULL)
1.153 dtucker 925: debug3("checking syntax for 'Match %s'", cp);
926: else
1.226 dtucker 927: debug3("checking match for '%s' user %s host %s addr %s "
928: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
929: ci->host ? ci->host : "(null)",
930: ci->address ? ci->address : "(null)",
931: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 932:
933: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 934: attributes++;
935: if (strcasecmp(attrib, "all") == 0) {
936: if (attributes != 1 ||
937: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
938: error("'all' cannot be combined with other "
939: "Match attributes");
940: return -1;
941: }
942: *condition = cp;
943: return 1;
944: }
1.153 dtucker 945: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
946: error("Missing Match criteria for %s", attrib);
947: return -1;
948: }
949: if (strcasecmp(attrib, "user") == 0) {
1.319 dtucker 950: if (ci == NULL) {
1.153 dtucker 951: result = 0;
952: continue;
953: }
1.319 dtucker 954: if (ci->user == NULL)
955: match_test_missing_fatal("User", "user");
1.269 djm 956: if (match_pattern_list(ci->user, arg, 0) != 1)
1.153 dtucker 957: result = 0;
958: else
959: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 960: "line %d", ci->user, arg, line);
1.165 dtucker 961: } else if (strcasecmp(attrib, "group") == 0) {
1.319 dtucker 962: if (ci == NULL) {
1.226 dtucker 963: result = 0;
964: continue;
965: }
1.319 dtucker 966: if (ci->user == NULL)
967: match_test_missing_fatal("Group", "user");
1.226 dtucker 968: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 969: case -1:
970: return -1;
971: case 0:
972: result = 0;
973: }
1.153 dtucker 974: } else if (strcasecmp(attrib, "host") == 0) {
1.319 dtucker 975: if (ci == NULL) {
1.153 dtucker 976: result = 0;
977: continue;
978: }
1.319 dtucker 979: if (ci->host == NULL)
980: match_test_missing_fatal("Host", "host");
1.269 djm 981: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 982: result = 0;
983: else
984: debug("connection from %.100s matched 'Host "
1.226 dtucker 985: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 986: } else if (strcasecmp(attrib, "address") == 0) {
1.319 dtucker 987: if (ci == NULL) {
1.226 dtucker 988: result = 0;
989: continue;
990: }
1.319 dtucker 991: if (ci->address == NULL)
992: match_test_missing_fatal("Address", "addr");
1.226 dtucker 993: switch (addr_match_list(ci->address, arg)) {
1.181 djm 994: case 1:
995: debug("connection from %.100s matched 'Address "
1.226 dtucker 996: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 997: break;
998: case 0:
1.183 djm 999: case -1:
1.153 dtucker 1000: result = 0;
1.181 djm 1001: break;
1.183 djm 1002: case -2:
1.181 djm 1003: return -1;
1.153 dtucker 1004: }
1.226 dtucker 1005: } else if (strcasecmp(attrib, "localaddress") == 0){
1.319 dtucker 1006: if (ci == NULL) {
1.226 dtucker 1007: result = 0;
1008: continue;
1009: }
1.319 dtucker 1010: if (ci->laddress == NULL)
1011: match_test_missing_fatal("LocalAddress",
1012: "laddr");
1.226 dtucker 1013: switch (addr_match_list(ci->laddress, arg)) {
1014: case 1:
1015: debug("connection from %.100s matched "
1016: "'LocalAddress %.100s' at line %d",
1017: ci->laddress, arg, line);
1018: break;
1019: case 0:
1020: case -1:
1021: result = 0;
1022: break;
1023: case -2:
1024: return -1;
1025: }
1026: } else if (strcasecmp(attrib, "localport") == 0) {
1027: if ((port = a2port(arg)) == -1) {
1028: error("Invalid LocalPort '%s' on Match line",
1029: arg);
1030: return -1;
1031: }
1.319 dtucker 1032: if (ci == NULL) {
1.226 dtucker 1033: result = 0;
1034: continue;
1035: }
1.319 dtucker 1036: if (ci->lport == 0)
1037: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1038: /* TODO support port lists */
1039: if (port == ci->lport)
1040: debug("connection from %.100s matched "
1041: "'LocalPort %d' at line %d",
1042: ci->laddress, port, line);
1043: else
1044: result = 0;
1.317 djm 1045: } else if (strcasecmp(attrib, "rdomain") == 0) {
1046: if (ci == NULL || ci->rdomain == NULL) {
1047: result = 0;
1048: continue;
1049: }
1050: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1051: result = 0;
1052: else
1053: debug("user %.100s matched 'RDomain %.100s' at "
1054: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1055: } else {
1056: error("Unsupported Match attribute %s", attrib);
1057: return -1;
1058: }
1.243 dtucker 1059: }
1060: if (attributes == 0) {
1061: error("One or more attributes required for Match");
1062: return -1;
1.153 dtucker 1063: }
1.226 dtucker 1064: if (ci != NULL)
1.153 dtucker 1065: debug3("match %sfound", result ? "" : "not ");
1066: *condition = cp;
1067: return result;
1068: }
1069:
1.158 dtucker 1070: #define WHITESPACE " \t\r\n"
1071:
1.220 djm 1072: /* Multistate option parsing */
1073: struct multistate {
1074: char *key;
1075: int value;
1076: };
1.320 djm 1077: static const struct multistate multistate_flag[] = {
1078: { "yes", 1 },
1079: { "no", 0 },
1080: { NULL, -1 }
1081: };
1.220 djm 1082: static const struct multistate multistate_addressfamily[] = {
1083: { "inet", AF_INET },
1084: { "inet6", AF_INET6 },
1085: { "any", AF_UNSPEC },
1086: { NULL, -1 }
1087: };
1088: static const struct multistate multistate_permitrootlogin[] = {
1089: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1090: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1091: { "forced-commands-only", PERMIT_FORCED_ONLY },
1092: { "yes", PERMIT_YES },
1093: { "no", PERMIT_NO },
1094: { NULL, -1 }
1095: };
1096: static const struct multistate multistate_compression[] = {
1.297 djm 1097: { "yes", COMP_DELAYED },
1.220 djm 1098: { "delayed", COMP_DELAYED },
1099: { "no", COMP_NONE },
1100: { NULL, -1 }
1101: };
1102: static const struct multistate multistate_gatewayports[] = {
1103: { "clientspecified", 2 },
1104: { "yes", 1 },
1105: { "no", 0 },
1.222 djm 1106: { NULL, -1 }
1107: };
1.233 djm 1108: static const struct multistate multistate_tcpfwd[] = {
1109: { "yes", FORWARD_ALLOW },
1110: { "all", FORWARD_ALLOW },
1111: { "no", FORWARD_DENY },
1112: { "remote", FORWARD_REMOTE },
1113: { "local", FORWARD_LOCAL },
1114: { NULL, -1 }
1115: };
1.220 djm 1116:
1.94 markus 1117: int
1118: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 1119: const char *filename, int linenum, int *activep,
1120: struct connection_info *connectinfo)
1.1 deraadt 1121: {
1.329 ! djm 1122: char *cp, ***chararrayptr, **charptr, *arg, *arg2, *p;
1.237 dtucker 1123: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 1124: SyslogFacility *log_facility_ptr;
1125: LogLevel *log_level_ptr;
1.25 markus 1126: ServerOpCodes opcode;
1.329 ! djm 1127: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1128: size_t len;
1.237 dtucker 1129: long long val64;
1.220 djm 1130: const struct multistate *multistate_ptr;
1.322 dtucker 1131: const char *errstr;
1.303 djm 1132:
1133: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1134: if ((len = strlen(line)) == 0)
1135: return 0;
1136: for (len--; len > 0; len--) {
1137: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1138: break;
1139: line[len] = '\0';
1140: }
1.25 markus 1141:
1.94 markus 1142: cp = line;
1.148 dtucker 1143: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1144: return 0;
1.94 markus 1145: /* Ignore leading whitespace */
1146: if (*arg == '\0')
1147: arg = strdelim(&cp);
1148: if (!arg || !*arg || *arg == '#')
1149: return 0;
1150: intptr = NULL;
1151: charptr = NULL;
1.153 dtucker 1152: opcode = parse_token(arg, filename, linenum, &flags);
1153:
1154: if (activep == NULL) { /* We are processing a command line directive */
1155: cmdline = 1;
1156: activep = &cmdline;
1157: }
1158: if (*activep && opcode != sMatch)
1159: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1160: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1161: if (connectinfo == NULL) {
1.153 dtucker 1162: fatal("%s line %d: Directive '%s' is not allowed "
1163: "within a Match block", filename, linenum, arg);
1164: } else { /* this is a directive we have already processed */
1165: while (arg)
1166: arg = strdelim(&cp);
1167: return 0;
1168: }
1169: }
1170:
1.94 markus 1171: switch (opcode) {
1172: case sBadOption:
1173: return -1;
1174: case sPort:
1175: /* ignore ports from configfile if cmdline specifies ports */
1176: if (options->ports_from_cmdline)
1177: return 0;
1178: if (options->num_ports >= MAX_PORTS)
1179: fatal("%s line %d: too many ports.",
1180: filename, linenum);
1.48 provos 1181: arg = strdelim(&cp);
1.94 markus 1182: if (!arg || *arg == '\0')
1183: fatal("%s line %d: missing port number.",
1184: filename, linenum);
1185: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1186: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1187: fatal("%s line %d: Badly formatted port number.",
1188: filename, linenum);
1189: break;
1.29 markus 1190:
1.94 markus 1191: case sLoginGraceTime:
1192: intptr = &options->login_grace_time;
1.180 djm 1193: parse_time:
1.94 markus 1194: arg = strdelim(&cp);
1195: if (!arg || *arg == '\0')
1196: fatal("%s line %d: missing time value.",
1197: filename, linenum);
1198: if ((value = convtime(arg)) == -1)
1199: fatal("%s line %d: invalid time value.",
1200: filename, linenum);
1.268 djm 1201: if (*activep && *intptr == -1)
1.94 markus 1202: *intptr = value;
1203: break;
1204:
1205: case sListenAddress:
1206: arg = strdelim(&cp);
1.139 djm 1207: if (arg == NULL || *arg == '\0')
1208: fatal("%s line %d: missing address",
1.94 markus 1209: filename, linenum);
1.144 dtucker 1210: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1211: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1212: && strchr(p+1, ':') != NULL) {
1.315 djm 1213: port = 0;
1214: p = arg;
1215: } else {
1216: p = hpdelim(&arg);
1217: if (p == NULL)
1218: fatal("%s line %d: bad address:port usage",
1219: filename, linenum);
1220: p = cleanhostname(p);
1221: if (arg == NULL)
1222: port = 0;
1223: else if ((port = a2port(arg)) <= 0)
1224: fatal("%s line %d: bad port number",
1225: filename, linenum);
1226: }
1227: /* Optional routing table */
1228: arg2 = NULL;
1229: if ((arg = strdelim(&cp)) != NULL) {
1230: if (strcmp(arg, "rdomain") != 0 ||
1231: (arg2 = strdelim(&cp)) == NULL)
1232: fatal("%s line %d: bad ListenAddress syntax",
1233: filename, linenum);
1234: if (!valid_rdomain(arg2))
1235: fatal("%s line %d: bad routing domain",
1236: filename, linenum);
1.144 dtucker 1237: }
1.139 djm 1238:
1.315 djm 1239: queue_listen_addr(options, p, arg2, port);
1.25 markus 1240:
1.138 djm 1241: break;
1242:
1243: case sAddressFamily:
1.220 djm 1244: intptr = &options->address_family;
1245: multistate_ptr = multistate_addressfamily;
1246: parse_multistate:
1.138 djm 1247: arg = strdelim(&cp);
1.141 markus 1248: if (!arg || *arg == '\0')
1.220 djm 1249: fatal("%s line %d: missing argument.",
1.141 markus 1250: filename, linenum);
1.220 djm 1251: value = -1;
1252: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1253: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1254: value = multistate_ptr[i].value;
1255: break;
1256: }
1257: }
1258: if (value == -1)
1259: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1260: filename, linenum, arg);
1.220 djm 1261: if (*activep && *intptr == -1)
1.138 djm 1262: *intptr = value;
1.94 markus 1263: break;
1264:
1265: case sHostKeyFile:
1266: arg = strdelim(&cp);
1267: if (!arg || *arg == '\0')
1268: fatal("%s line %d: missing file name.",
1269: filename, linenum);
1.314 djm 1270: if (*activep)
1271: servconf_add_hostkey(filename, linenum, options, arg);
1.94 markus 1272: break;
1.76 stevesk 1273:
1.240 markus 1274: case sHostKeyAgent:
1275: charptr = &options->host_key_agent;
1276: arg = strdelim(&cp);
1277: if (!arg || *arg == '\0')
1278: fatal("%s line %d: missing socket name.",
1279: filename, linenum);
1280: if (*activep && *charptr == NULL)
1281: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1282: xstrdup(arg) : derelativise_path(arg);
1283: break;
1284:
1.203 djm 1285: case sHostCertificate:
1.314 djm 1286: arg = strdelim(&cp);
1287: if (!arg || *arg == '\0')
1288: fatal("%s line %d: missing file name.",
1289: filename, linenum);
1290: if (*activep)
1291: servconf_add_hostcert(filename, linenum, options, arg);
1292: break;
1.203 djm 1293:
1.94 markus 1294: case sPidFile:
1295: charptr = &options->pid_file;
1.314 djm 1296: parse_filename:
1297: arg = strdelim(&cp);
1298: if (!arg || *arg == '\0')
1299: fatal("%s line %d: missing file name.",
1300: filename, linenum);
1301: if (*activep && *charptr == NULL) {
1302: *charptr = derelativise_path(arg);
1303: /* increase optional counter */
1304: if (intptr != NULL)
1305: *intptr = *intptr + 1;
1306: }
1307: break;
1.25 markus 1308:
1.94 markus 1309: case sPermitRootLogin:
1310: intptr = &options->permit_root_login;
1.220 djm 1311: multistate_ptr = multistate_permitrootlogin;
1312: goto parse_multistate;
1.36 markus 1313:
1.94 markus 1314: case sIgnoreRhosts:
1315: intptr = &options->ignore_rhosts;
1.180 djm 1316: parse_flag:
1.320 djm 1317: multistate_ptr = multistate_flag;
1318: goto parse_multistate;
1.94 markus 1319:
1320: case sIgnoreUserKnownHosts:
1321: intptr = &options->ignore_user_known_hosts;
1322: goto parse_flag;
1323:
1324: case sHostbasedAuthentication:
1325: intptr = &options->hostbased_authentication;
1326: goto parse_flag;
1327:
1328: case sHostbasedUsesNameFromPacketOnly:
1329: intptr = &options->hostbased_uses_name_from_packet_only;
1330: goto parse_flag;
1331:
1.258 djm 1332: case sHostbasedAcceptedKeyTypes:
1333: charptr = &options->hostbased_key_types;
1334: parse_keytypes:
1335: arg = strdelim(&cp);
1336: if (!arg || *arg == '\0')
1337: fatal("%s line %d: Missing argument.",
1338: filename, linenum);
1.304 djm 1339: if (*arg != '-' &&
1340: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.258 djm 1341: fatal("%s line %d: Bad key types '%s'.",
1342: filename, linenum, arg ? arg : "<NONE>");
1343: if (*activep && *charptr == NULL)
1344: *charptr = xstrdup(arg);
1345: break;
1346:
1.276 markus 1347: case sHostKeyAlgorithms:
1348: charptr = &options->hostkeyalgorithms;
1349: goto parse_keytypes;
1350:
1.94 markus 1351: case sPubkeyAuthentication:
1352: intptr = &options->pubkey_authentication;
1353: goto parse_flag;
1.119 jakob 1354:
1.258 djm 1355: case sPubkeyAcceptedKeyTypes:
1356: charptr = &options->pubkey_key_types;
1357: goto parse_keytypes;
1358:
1.94 markus 1359: case sKerberosAuthentication:
1360: intptr = &options->kerberos_authentication;
1361: goto parse_flag;
1362:
1363: case sKerberosOrLocalPasswd:
1364: intptr = &options->kerberos_or_local_passwd;
1365: goto parse_flag;
1366:
1367: case sKerberosTicketCleanup:
1368: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1369: goto parse_flag;
1370:
1371: case sKerberosGetAFSToken:
1372: intptr = &options->kerberos_get_afs_token;
1.125 markus 1373: goto parse_flag;
1374:
1375: case sGssAuthentication:
1376: intptr = &options->gss_authentication;
1377: goto parse_flag;
1378:
1379: case sGssCleanupCreds:
1380: intptr = &options->gss_cleanup_creds;
1.271 djm 1381: goto parse_flag;
1382:
1383: case sGssStrictAcceptor:
1384: intptr = &options->gss_strict_acceptor;
1.94 markus 1385: goto parse_flag;
1386:
1387: case sPasswordAuthentication:
1388: intptr = &options->password_authentication;
1389: goto parse_flag;
1390:
1391: case sKbdInteractiveAuthentication:
1392: intptr = &options->kbd_interactive_authentication;
1393: goto parse_flag;
1394:
1395: case sChallengeResponseAuthentication:
1396: intptr = &options->challenge_response_authentication;
1397: goto parse_flag;
1398:
1399: case sPrintMotd:
1400: intptr = &options->print_motd;
1401: goto parse_flag;
1402:
1403: case sPrintLastLog:
1404: intptr = &options->print_lastlog;
1405: goto parse_flag;
1406:
1407: case sX11Forwarding:
1408: intptr = &options->x11_forwarding;
1409: goto parse_flag;
1410:
1411: case sX11DisplayOffset:
1412: intptr = &options->x11_display_offset;
1.293 naddy 1413: parse_int:
1414: arg = strdelim(&cp);
1.322 dtucker 1415: if ((errstr = atoi_err(arg, &value)) != NULL)
1416: fatal("%s line %d: integer value %s.",
1417: filename, linenum, errstr);
1.293 naddy 1418: if (*activep && *intptr == -1)
1419: *intptr = value;
1420: break;
1.99 stevesk 1421:
1422: case sX11UseLocalhost:
1423: intptr = &options->x11_use_localhost;
1424: goto parse_flag;
1.94 markus 1425:
1426: case sXAuthLocation:
1427: charptr = &options->xauth_location;
1428: goto parse_filename;
1429:
1.244 djm 1430: case sPermitTTY:
1431: intptr = &options->permit_tty;
1432: goto parse_flag;
1433:
1.250 djm 1434: case sPermitUserRC:
1435: intptr = &options->permit_user_rc;
1436: goto parse_flag;
1437:
1.94 markus 1438: case sStrictModes:
1439: intptr = &options->strict_modes;
1440: goto parse_flag;
1441:
1.129 markus 1442: case sTCPKeepAlive:
1443: intptr = &options->tcp_keep_alive;
1.94 markus 1444: goto parse_flag;
1445:
1446: case sEmptyPasswd:
1447: intptr = &options->permit_empty_passwd;
1.113 markus 1448: goto parse_flag;
1449:
1450: case sPermitUserEnvironment:
1451: intptr = &options->permit_user_env;
1.94 markus 1452: goto parse_flag;
1453:
1.111 markus 1454: case sCompression:
1455: intptr = &options->compression;
1.220 djm 1456: multistate_ptr = multistate_compression;
1457: goto parse_multistate;
1.94 markus 1458:
1.235 dtucker 1459: case sRekeyLimit:
1460: arg = strdelim(&cp);
1461: if (!arg || *arg == '\0')
1462: fatal("%.200s line %d: Missing argument.", filename,
1463: linenum);
1464: if (strcmp(arg, "default") == 0) {
1465: val64 = 0;
1466: } else {
1.236 dtucker 1467: if (scan_scaled(arg, &val64) == -1)
1468: fatal("%.200s line %d: Bad number '%s': %s",
1469: filename, linenum, arg, strerror(errno));
1.235 dtucker 1470: if (val64 != 0 && val64 < 16)
1471: fatal("%.200s line %d: RekeyLimit too small",
1472: filename, linenum);
1473: }
1474: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1475: options->rekey_limit = val64;
1.235 dtucker 1476: if (cp != NULL) { /* optional rekey interval present */
1477: if (strcmp(cp, "none") == 0) {
1478: (void)strdelim(&cp); /* discard */
1479: break;
1480: }
1481: intptr = &options->rekey_interval;
1482: goto parse_time;
1483: }
1484: break;
1485:
1.94 markus 1486: case sGatewayPorts:
1.251 millert 1487: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1488: multistate_ptr = multistate_gatewayports;
1489: goto parse_multistate;
1.25 markus 1490:
1.122 markus 1491: case sUseDNS:
1492: intptr = &options->use_dns;
1.94 markus 1493: goto parse_flag;
1.53 markus 1494:
1.94 markus 1495: case sLogFacility:
1.174 dtucker 1496: log_facility_ptr = &options->log_facility;
1.94 markus 1497: arg = strdelim(&cp);
1498: value = log_facility_number(arg);
1.101 markus 1499: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1500: fatal("%.200s line %d: unsupported log facility '%s'",
1501: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1502: if (*log_facility_ptr == -1)
1503: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1504: break;
1.25 markus 1505:
1.94 markus 1506: case sLogLevel:
1.174 dtucker 1507: log_level_ptr = &options->log_level;
1.94 markus 1508: arg = strdelim(&cp);
1509: value = log_level_number(arg);
1.101 markus 1510: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1511: fatal("%.200s line %d: unsupported log level '%s'",
1512: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1513: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1514: *log_level_ptr = (LogLevel) value;
1.94 markus 1515: break;
1516:
1517: case sAllowTcpForwarding:
1518: intptr = &options->allow_tcp_forwarding;
1.233 djm 1519: multistate_ptr = multistate_tcpfwd;
1520: goto parse_multistate;
1.102 provos 1521:
1.251 millert 1522: case sAllowStreamLocalForwarding:
1523: intptr = &options->allow_streamlocal_forwarding;
1524: multistate_ptr = multistate_tcpfwd;
1525: goto parse_multistate;
1526:
1.178 pyr 1527: case sAllowAgentForwarding:
1528: intptr = &options->allow_agent_forwarding;
1529: goto parse_flag;
1530:
1.301 djm 1531: case sDisableForwarding:
1532: intptr = &options->disable_forwarding;
1533: goto parse_flag;
1534:
1.94 markus 1535: case sAllowUsers:
1536: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1537: if (match_user(NULL, NULL, NULL, arg) == -1)
1538: fatal("%s line %d: invalid AllowUsers pattern: "
1539: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1540: if (!*activep)
1541: continue;
1.314 djm 1542: array_append(filename, linenum, "AllowUsers",
1543: &options->allow_users, &options->num_allow_users,
1544: arg);
1.94 markus 1545: }
1546: break;
1.25 markus 1547:
1.94 markus 1548: case sDenyUsers:
1549: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1550: if (match_user(NULL, NULL, NULL, arg) == -1)
1551: fatal("%s line %d: invalid DenyUsers pattern: "
1552: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1553: if (!*activep)
1554: continue;
1.314 djm 1555: array_append(filename, linenum, "DenyUsers",
1556: &options->deny_users, &options->num_deny_users,
1557: arg);
1.94 markus 1558: }
1559: break;
1.25 markus 1560:
1.94 markus 1561: case sAllowGroups:
1562: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1563: if (!*activep)
1564: continue;
1.314 djm 1565: array_append(filename, linenum, "AllowGroups",
1566: &options->allow_groups, &options->num_allow_groups,
1567: arg);
1.94 markus 1568: }
1569: break;
1.33 markus 1570:
1.94 markus 1571: case sDenyGroups:
1572: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1573: if (!*activep)
1574: continue;
1.314 djm 1575: array_append(filename, linenum, "DenyGroups",
1576: &options->deny_groups, &options->num_deny_groups,
1577: arg);
1.94 markus 1578: }
1579: break;
1.66 markus 1580:
1.94 markus 1581: case sCiphers:
1582: arg = strdelim(&cp);
1583: if (!arg || *arg == '\0')
1584: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1585: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1586: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1587: filename, linenum, arg ? arg : "<NONE>");
1588: if (options->ciphers == NULL)
1589: options->ciphers = xstrdup(arg);
1590: break;
1.33 markus 1591:
1.94 markus 1592: case sMacs:
1593: arg = strdelim(&cp);
1594: if (!arg || *arg == '\0')
1595: fatal("%s line %d: Missing argument.", filename, linenum);
1.304 djm 1596: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1597: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1598: filename, linenum, arg ? arg : "<NONE>");
1599: if (options->macs == NULL)
1600: options->macs = xstrdup(arg);
1.211 djm 1601: break;
1602:
1603: case sKexAlgorithms:
1604: arg = strdelim(&cp);
1605: if (!arg || *arg == '\0')
1606: fatal("%s line %d: Missing argument.",
1607: filename, linenum);
1.304 djm 1608: if (*arg != '-' &&
1609: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.211 djm 1610: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1611: filename, linenum, arg ? arg : "<NONE>");
1612: if (options->kex_algorithms == NULL)
1613: options->kex_algorithms = xstrdup(arg);
1.94 markus 1614: break;
1.43 jakob 1615:
1.94 markus 1616: case sSubsystem:
1617: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1618: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1619: filename, linenum);
1.94 markus 1620: }
1621: arg = strdelim(&cp);
1622: if (!arg || *arg == '\0')
1623: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1624: filename, linenum);
1.153 dtucker 1625: if (!*activep) {
1626: arg = strdelim(&cp);
1627: break;
1628: }
1.94 markus 1629: for (i = 0; i < options->num_subsystems; i++)
1630: if (strcmp(arg, options->subsystem_name[i]) == 0)
1631: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1632: filename, linenum, arg);
1.94 markus 1633: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1634: arg = strdelim(&cp);
1635: if (!arg || *arg == '\0')
1636: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1637: filename, linenum);
1.94 markus 1638: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1639:
1640: /* Collect arguments (separate to executable) */
1641: p = xstrdup(arg);
1642: len = strlen(p) + 1;
1643: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1644: len += 1 + strlen(arg);
1.264 deraadt 1645: p = xreallocarray(p, 1, len);
1.151 djm 1646: strlcat(p, " ", len);
1647: strlcat(p, arg, len);
1648: }
1649: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1650: options->num_subsystems++;
1651: break;
1.46 markus 1652:
1.94 markus 1653: case sMaxStartups:
1654: arg = strdelim(&cp);
1655: if (!arg || *arg == '\0')
1656: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1657: filename, linenum);
1.94 markus 1658: if ((n = sscanf(arg, "%d:%d:%d",
1659: &options->max_startups_begin,
1660: &options->max_startups_rate,
1661: &options->max_startups)) == 3) {
1662: if (options->max_startups_begin >
1663: options->max_startups ||
1664: options->max_startups_rate > 100 ||
1665: options->max_startups_rate < 1)
1.50 markus 1666: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1667: filename, linenum);
1.94 markus 1668: } else if (n != 1)
1669: fatal("%s line %d: Illegal MaxStartups spec.",
1670: filename, linenum);
1671: else
1672: options->max_startups = options->max_startups_begin;
1673: break;
1.133 dtucker 1674:
1675: case sMaxAuthTries:
1676: intptr = &options->max_authtries;
1677: goto parse_int;
1.94 markus 1678:
1.180 djm 1679: case sMaxSessions:
1680: intptr = &options->max_sessions;
1681: goto parse_int;
1682:
1.94 markus 1683: case sBanner:
1684: charptr = &options->banner;
1685: goto parse_filename;
1.176 djm 1686:
1.94 markus 1687: /*
1688: * These options can contain %X options expanded at
1689: * connect time, so that you can specify paths like:
1690: *
1691: * AuthorizedKeysFile /etc/ssh_keys/%u
1692: */
1693: case sAuthorizedKeysFile:
1.219 djm 1694: if (*activep && options->num_authkeys_files == 0) {
1695: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1696: arg = tilde_expand_filename(arg, getuid());
1697: array_append(filename, linenum,
1698: "AuthorizedKeysFile",
1699: &options->authorized_keys_files,
1700: &options->num_authkeys_files, arg);
1701: free(arg);
1.219 djm 1702: }
1703: }
1704: return 0;
1705:
1.208 djm 1706: case sAuthorizedPrincipalsFile:
1707: charptr = &options->authorized_principals_file;
1.205 djm 1708: arg = strdelim(&cp);
1709: if (!arg || *arg == '\0')
1710: fatal("%s line %d: missing file name.",
1711: filename, linenum);
1712: if (*activep && *charptr == NULL) {
1.206 markus 1713: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1714: /* increase optional counter */
1715: if (intptr != NULL)
1716: *intptr = *intptr + 1;
1717: }
1718: break;
1.94 markus 1719:
1720: case sClientAliveInterval:
1721: intptr = &options->client_alive_interval;
1722: goto parse_time;
1723:
1724: case sClientAliveCountMax:
1725: intptr = &options->client_alive_count_max;
1726: goto parse_int;
1.131 djm 1727:
1728: case sAcceptEnv:
1729: while ((arg = strdelim(&cp)) && *arg != '\0') {
1730: if (strchr(arg, '=') != NULL)
1731: fatal("%s line %d: Invalid environment name.",
1732: filename, linenum);
1.153 dtucker 1733: if (!*activep)
1.227 markus 1734: continue;
1.314 djm 1735: array_append(filename, linenum, "AcceptEnv",
1736: &options->accept_env, &options->num_accept_env,
1737: arg);
1.131 djm 1738: }
1739: break;
1.145 reyk 1740:
1741: case sPermitTunnel:
1742: intptr = &options->permit_tun;
1.146 reyk 1743: arg = strdelim(&cp);
1744: if (!arg || *arg == '\0')
1745: fatal("%s line %d: Missing yes/point-to-point/"
1746: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1747: value = -1;
1748: for (i = 0; tunmode_desc[i].val != -1; i++)
1749: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1750: value = tunmode_desc[i].val;
1751: break;
1752: }
1753: if (value == -1)
1.146 reyk 1754: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1755: "no argument: %s", filename, linenum, arg);
1.268 djm 1756: if (*activep && *intptr == -1)
1.146 reyk 1757: *intptr = value;
1758: break;
1.94 markus 1759:
1.153 dtucker 1760: case sMatch:
1761: if (cmdline)
1762: fatal("Match directive not supported as a command-line "
1763: "option");
1.226 dtucker 1764: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1765: if (value < 0)
1766: fatal("%s line %d: Bad Match condition", filename,
1767: linenum);
1768: *activep = value;
1.156 dtucker 1769: break;
1770:
1.329 ! djm 1771: case sPermitRemoteOpen:
1.156 dtucker 1772: case sPermitOpen:
1.329 ! djm 1773: if (opcode == sPermitRemoteOpen) {
! 1774: uintptr = &options->num_permitted_remote_opens;
! 1775: chararrayptr = &options->permitted_remote_opens;
! 1776: } else {
! 1777: uintptr = &options->num_permitted_opens;
! 1778: chararrayptr = &options->permitted_opens;
! 1779: }
1.156 dtucker 1780: arg = strdelim(&cp);
1781: if (!arg || *arg == '\0')
1.329 ! djm 1782: fatal("%s line %d: missing %s specification",
! 1783: filename, linenum, lookup_opcode_name(opcode));
! 1784: uvalue = *uintptr; /* modified later */
1.310 djm 1785: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 ! djm 1786: if (*activep && uvalue == 0) {
! 1787: *uintptr = 1;
! 1788: *chararrayptr = xcalloc(1,
! 1789: sizeof(**chararrayptr));
! 1790: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 1791: }
1.156 dtucker 1792: break;
1793: }
1.159 dtucker 1794: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.310 djm 1795: arg2 = xstrdup(arg);
1.159 dtucker 1796: p = hpdelim(&arg);
1.329 ! djm 1797: /* XXX support bare port number for PermitRemoteOpen */
! 1798: if (p == NULL) {
! 1799: fatal("%s line %d: missing host in %s",
! 1800: filename, linenum,
! 1801: lookup_opcode_name(opcode));
! 1802: }
1.159 dtucker 1803: p = cleanhostname(p);
1.329 ! djm 1804: if (arg == NULL ||
! 1805: ((port = permitopen_port(arg)) < 0)) {
! 1806: fatal("%s line %d: bad port number in %s",
! 1807: filename, linenum,
! 1808: lookup_opcode_name(opcode));
! 1809: }
! 1810: if (*activep && uvalue == 0) {
1.314 djm 1811: array_append(filename, linenum,
1.329 ! djm 1812: lookup_opcode_name(opcode),
! 1813: chararrayptr, uintptr, arg2);
1.314 djm 1814: }
1815: free(arg2);
1.159 dtucker 1816: }
1.153 dtucker 1817: break;
1818:
1.158 dtucker 1819: case sForceCommand:
1.262 dtucker 1820: if (cp == NULL || *cp == '\0')
1.158 dtucker 1821: fatal("%.200s line %d: Missing argument.", filename,
1822: linenum);
1823: len = strspn(cp, WHITESPACE);
1824: if (*activep && options->adm_forced_command == NULL)
1825: options->adm_forced_command = xstrdup(cp + len);
1826: return 0;
1827:
1.176 djm 1828: case sChrootDirectory:
1829: charptr = &options->chroot_directory;
1.177 djm 1830:
1831: arg = strdelim(&cp);
1832: if (!arg || *arg == '\0')
1833: fatal("%s line %d: missing file name.",
1834: filename, linenum);
1835: if (*activep && *charptr == NULL)
1836: *charptr = xstrdup(arg);
1837: break;
1.176 djm 1838:
1.204 djm 1839: case sTrustedUserCAKeys:
1840: charptr = &options->trusted_user_ca_keys;
1841: goto parse_filename;
1842:
1843: case sRevokedKeys:
1844: charptr = &options->revoked_keys_file;
1845: goto parse_filename;
1846:
1.213 djm 1847: case sIPQoS:
1848: arg = strdelim(&cp);
1849: if ((value = parse_ipqos(arg)) == -1)
1850: fatal("%s line %d: Bad IPQoS value: %s",
1851: filename, linenum, arg);
1852: arg = strdelim(&cp);
1853: if (arg == NULL)
1854: value2 = value;
1855: else if ((value2 = parse_ipqos(arg)) == -1)
1856: fatal("%s line %d: Bad IPQoS value: %s",
1857: filename, linenum, arg);
1858: if (*activep) {
1859: options->ip_qos_interactive = value;
1860: options->ip_qos_bulk = value2;
1861: }
1862: break;
1863:
1.225 djm 1864: case sVersionAddendum:
1.262 dtucker 1865: if (cp == NULL || *cp == '\0')
1.225 djm 1866: fatal("%.200s line %d: Missing argument.", filename,
1867: linenum);
1868: len = strspn(cp, WHITESPACE);
1869: if (*activep && options->version_addendum == NULL) {
1870: if (strcasecmp(cp + len, "none") == 0)
1871: options->version_addendum = xstrdup("");
1872: else if (strchr(cp + len, '\r') != NULL)
1873: fatal("%.200s line %d: Invalid argument",
1874: filename, linenum);
1875: else
1876: options->version_addendum = xstrdup(cp + len);
1877: }
1878: return 0;
1879:
1.231 djm 1880: case sAuthorizedKeysCommand:
1.255 jsg 1881: if (cp == NULL)
1882: fatal("%.200s line %d: Missing argument.", filename,
1883: linenum);
1.231 djm 1884: len = strspn(cp, WHITESPACE);
1885: if (*activep && options->authorized_keys_command == NULL) {
1886: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1887: fatal("%.200s line %d: AuthorizedKeysCommand "
1888: "must be an absolute path",
1889: filename, linenum);
1890: options->authorized_keys_command = xstrdup(cp + len);
1891: }
1892: return 0;
1893:
1894: case sAuthorizedKeysCommandUser:
1895: charptr = &options->authorized_keys_command_user;
1896:
1897: arg = strdelim(&cp);
1.255 jsg 1898: if (!arg || *arg == '\0')
1899: fatal("%s line %d: missing AuthorizedKeysCommandUser "
1900: "argument.", filename, linenum);
1.231 djm 1901: if (*activep && *charptr == NULL)
1902: *charptr = xstrdup(arg);
1903: break;
1904:
1.270 djm 1905: case sAuthorizedPrincipalsCommand:
1906: if (cp == NULL)
1907: fatal("%.200s line %d: Missing argument.", filename,
1908: linenum);
1909: len = strspn(cp, WHITESPACE);
1910: if (*activep &&
1911: options->authorized_principals_command == NULL) {
1912: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1913: fatal("%.200s line %d: "
1914: "AuthorizedPrincipalsCommand must be "
1915: "an absolute path", filename, linenum);
1916: options->authorized_principals_command =
1917: xstrdup(cp + len);
1918: }
1919: return 0;
1920:
1921: case sAuthorizedPrincipalsCommandUser:
1922: charptr = &options->authorized_principals_command_user;
1923:
1924: arg = strdelim(&cp);
1925: if (!arg || *arg == '\0')
1926: fatal("%s line %d: missing "
1927: "AuthorizedPrincipalsCommandUser argument.",
1928: filename, linenum);
1929: if (*activep && *charptr == NULL)
1930: *charptr = xstrdup(arg);
1931: break;
1932:
1.232 djm 1933: case sAuthenticationMethods:
1.268 djm 1934: if (options->num_auth_methods == 0) {
1.291 djm 1935: value = 0; /* seen "any" pseudo-method */
1.328 djm 1936: value2 = 0; /* successfully parsed any method */
1.232 djm 1937: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 1938: if (strcmp(arg, "any") == 0) {
1939: if (options->num_auth_methods > 0) {
1940: fatal("%s line %d: \"any\" "
1941: "must appear alone in "
1942: "AuthenticationMethods",
1943: filename, linenum);
1944: }
1945: value = 1;
1946: } else if (value) {
1947: fatal("%s line %d: \"any\" must appear "
1948: "alone in AuthenticationMethods",
1949: filename, linenum);
1950: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 1951: fatal("%s line %d: invalid "
1952: "authentication method list.",
1953: filename, linenum);
1.291 djm 1954: }
1.292 djm 1955: value2 = 1;
1.268 djm 1956: if (!*activep)
1957: continue;
1.314 djm 1958: array_append(filename, linenum,
1959: "AuthenticationMethods",
1960: &options->auth_methods,
1961: &options->num_auth_methods, arg);
1.232 djm 1962: }
1.292 djm 1963: if (value2 == 0) {
1.291 djm 1964: fatal("%s line %d: no AuthenticationMethods "
1965: "specified", filename, linenum);
1966: }
1.232 djm 1967: }
1968: return 0;
1969:
1.251 millert 1970: case sStreamLocalBindMask:
1971: arg = strdelim(&cp);
1972: if (!arg || *arg == '\0')
1.268 djm 1973: fatal("%s line %d: missing StreamLocalBindMask "
1974: "argument.", filename, linenum);
1.251 millert 1975: /* Parse mode in octal format */
1976: value = strtol(arg, &p, 8);
1977: if (arg == p || value < 0 || value > 0777)
1978: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 1979: if (*activep)
1980: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 1981: break;
1982:
1983: case sStreamLocalBindUnlink:
1984: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1985: goto parse_flag;
1986:
1.256 djm 1987: case sFingerprintHash:
1988: arg = strdelim(&cp);
1989: if (!arg || *arg == '\0')
1990: fatal("%.200s line %d: Missing argument.",
1991: filename, linenum);
1992: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1993: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1994: filename, linenum, arg);
1995: if (*activep)
1996: options->fingerprint_hash = value;
1997: break;
1998:
1.309 djm 1999: case sExposeAuthInfo:
2000: intptr = &options->expose_userauth_info;
2001: goto parse_flag;
2002:
1.316 djm 2003: case sRDomain:
2004: charptr = &options->routing_domain;
2005: arg = strdelim(&cp);
2006: if (!arg || *arg == '\0')
2007: fatal("%.200s line %d: Missing argument.",
2008: filename, linenum);
2009: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2010: !valid_rdomain(arg))
2011: fatal("%s line %d: bad routing domain",
2012: filename, linenum);
2013: if (*activep && *charptr == NULL)
2014: *charptr = xstrdup(arg);
1.321 dtucker 2015: break;
1.316 djm 2016:
1.94 markus 2017: case sDeprecated:
1.295 djm 2018: case sIgnore:
1.121 jakob 2019: case sUnsupported:
1.295 djm 2020: do_log2(opcode == sIgnore ?
2021: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2022: "%s line %d: %s option %s", filename, linenum,
2023: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 2024: while (arg)
2025: arg = strdelim(&cp);
2026: break;
2027:
2028: default:
2029: fatal("%s line %d: Missing handler for opcode %s (%d)",
2030: filename, linenum, arg, opcode);
2031: }
2032: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
2033: fatal("%s line %d: garbage at end of line; \"%.200s\".",
2034: filename, linenum, arg);
2035: return 0;
2036: }
2037:
2038: /* Reads the server configuration file. */
1.25 markus 2039:
1.94 markus 2040: void
1.134 djm 2041: load_server_config(const char *filename, Buffer *conf)
1.94 markus 2042: {
1.229 dtucker 2043: char line[4096], *cp;
1.94 markus 2044: FILE *f;
1.229 dtucker 2045: int lineno = 0;
1.81 stevesk 2046:
1.134 djm 2047: debug2("%s: filename %s", __func__, filename);
2048: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2049: perror(filename);
2050: exit(1);
2051: }
1.134 djm 2052: buffer_clear(conf);
2053: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 2054: lineno++;
2055: if (strlen(line) == sizeof(line) - 1)
2056: fatal("%s line %d too long", filename, lineno);
1.134 djm 2057: /*
2058: * Trim out comments and strip whitespace
1.135 deraadt 2059: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2060: * line numbers later for error messages
2061: */
2062: if ((cp = strchr(line, '#')) != NULL)
2063: memcpy(cp, "\n", 2);
2064: cp = line + strspn(line, " \t\r");
2065:
2066: buffer_append(conf, cp, strlen(cp));
2067: }
2068: buffer_append(conf, "\0", 1);
2069: fclose(f);
2070: debug2("%s: done config len = %d", __func__, buffer_len(conf));
2071: }
2072:
2073: void
1.226 dtucker 2074: parse_server_match_config(ServerOptions *options,
2075: struct connection_info *connectinfo)
1.153 dtucker 2076: {
2077: ServerOptions mo;
2078:
2079: initialize_server_options(&mo);
1.226 dtucker 2080: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 2081: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2082: }
2083:
1.226 dtucker 2084: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2085: {
2086: char *p;
2087:
2088: while ((p = strsep(&spec, ",")) && *p != '\0') {
2089: if (strncmp(p, "addr=", 5) == 0) {
2090: ci->address = xstrdup(p + 5);
2091: } else if (strncmp(p, "host=", 5) == 0) {
2092: ci->host = xstrdup(p + 5);
2093: } else if (strncmp(p, "user=", 5) == 0) {
2094: ci->user = xstrdup(p + 5);
2095: } else if (strncmp(p, "laddr=", 6) == 0) {
2096: ci->laddress = xstrdup(p + 6);
1.317 djm 2097: } else if (strncmp(p, "rdomain=", 8) == 0) {
2098: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2099: } else if (strncmp(p, "lport=", 6) == 0) {
2100: ci->lport = a2port(p + 6);
2101: if (ci->lport == -1) {
2102: fprintf(stderr, "Invalid port '%s' in test mode"
2103: " specification %s\n", p+6, p);
2104: return -1;
2105: }
2106: } else {
2107: fprintf(stderr, "Invalid test mode specification %s\n",
2108: p);
2109: return -1;
2110: }
2111: }
2112: return 0;
2113: }
2114:
1.168 dtucker 2115: /*
2116: * Copy any supported values that are set.
2117: *
1.195 jj 2118: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2119: * array values that are not used pre-authentication, because any that we
1.328 djm 2120: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2121: */
1.153 dtucker 2122: void
1.168 dtucker 2123: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2124: {
1.247 djm 2125: #define M_CP_INTOPT(n) do {\
2126: if (src->n != -1) \
2127: dst->n = src->n; \
2128: } while (0)
2129:
1.168 dtucker 2130: M_CP_INTOPT(password_authentication);
2131: M_CP_INTOPT(gss_authentication);
2132: M_CP_INTOPT(pubkey_authentication);
2133: M_CP_INTOPT(kerberos_authentication);
2134: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2135: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2136: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2137: M_CP_INTOPT(permit_root_login);
1.188 djm 2138: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 2139:
2140: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2141: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2142: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2143: M_CP_INTOPT(disable_forwarding);
1.309 djm 2144: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2145: M_CP_INTOPT(permit_tun);
1.251 millert 2146: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2147: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2148: M_CP_INTOPT(x11_display_offset);
2149: M_CP_INTOPT(x11_forwarding);
2150: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2151: M_CP_INTOPT(permit_tty);
1.250 djm 2152: M_CP_INTOPT(permit_user_rc);
1.180 djm 2153: M_CP_INTOPT(max_sessions);
1.184 dtucker 2154: M_CP_INTOPT(max_authtries);
1.300 markus 2155: M_CP_INTOPT(client_alive_count_max);
2156: M_CP_INTOPT(client_alive_interval);
1.213 djm 2157: M_CP_INTOPT(ip_qos_interactive);
2158: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2159: M_CP_INTOPT(rekey_limit);
2160: M_CP_INTOPT(rekey_interval);
1.308 djm 2161: M_CP_INTOPT(log_level);
1.289 djm 2162:
2163: /*
2164: * The bind_mask is a mode_t that may be unsigned, so we can't use
2165: * M_CP_INTOPT - it does a signed comparison that causes compiler
2166: * warnings.
2167: */
1.290 dtucker 2168: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2169: dst->fwd_opts.streamlocal_bind_mask =
2170: src->fwd_opts.streamlocal_bind_mask;
2171: }
1.247 djm 2172:
2173: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2174: #define M_CP_STROPT(n) do {\
2175: if (src->n != NULL && dst->n != src->n) { \
2176: free(dst->n); \
2177: dst->n = src->n; \
2178: } \
2179: } while(0)
1.314 djm 2180: #define M_CP_STRARRAYOPT(s, num_s) do {\
2181: u_int i; \
2182: if (src->num_s != 0) { \
2183: for (i = 0; i < dst->num_s; i++) \
2184: free(dst->s[i]); \
2185: free(dst->s); \
2186: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2187: for (i = 0; i < src->num_s; i++) \
2188: dst->s[i] = xstrdup(src->s[i]); \
2189: dst->num_s = src->num_s; \
1.312 djm 2190: } \
2191: } while(0)
1.168 dtucker 2192:
1.218 djm 2193: /* See comment in servconf.h */
2194: COPY_MATCH_STRING_OPTS();
1.282 djm 2195:
2196: /* Arguments that accept '+...' need to be expanded */
2197: assemble_algorithms(dst);
1.216 djm 2198:
1.217 dtucker 2199: /*
2200: * The only things that should be below this point are string options
2201: * which are only used after authentication.
2202: */
1.168 dtucker 2203: if (preauth)
2204: return;
1.219 djm 2205:
1.283 djm 2206: /* These options may be "none" to clear a global setting */
1.168 dtucker 2207: M_CP_STROPT(adm_forced_command);
1.283 djm 2208: if (option_clear_or_none(dst->adm_forced_command)) {
2209: free(dst->adm_forced_command);
2210: dst->adm_forced_command = NULL;
2211: }
1.176 djm 2212: M_CP_STROPT(chroot_directory);
1.283 djm 2213: if (option_clear_or_none(dst->chroot_directory)) {
2214: free(dst->chroot_directory);
2215: dst->chroot_directory = NULL;
2216: }
1.153 dtucker 2217: }
1.168 dtucker 2218:
2219: #undef M_CP_INTOPT
2220: #undef M_CP_STROPT
1.219 djm 2221: #undef M_CP_STRARRAYOPT
1.153 dtucker 2222:
2223: void
2224: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 2225: struct connection_info *connectinfo)
1.134 djm 2226: {
1.153 dtucker 2227: int active, linenum, bad_options = 0;
1.136 dtucker 2228: char *cp, *obuf, *cbuf;
1.134 djm 2229:
2230: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
2231:
1.287 djm 2232: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2233: fatal("%s: sshbuf_dup_string failed", __func__);
1.226 dtucker 2234: active = connectinfo ? 0 : 1;
1.137 dtucker 2235: linenum = 1;
1.140 deraadt 2236: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 2237: if (process_server_config_line(options, cp, filename,
1.226 dtucker 2238: linenum++, &active, connectinfo) != 0)
1.94 markus 2239: bad_options++;
1.1 deraadt 2240: }
1.239 djm 2241: free(obuf);
1.78 stevesk 2242: if (bad_options > 0)
2243: fatal("%s: terminating, %d bad configuration options",
2244: filename, bad_options);
1.266 dtucker 2245: process_queued_listen_addrs(options);
1.182 dtucker 2246: }
2247:
2248: static const char *
1.221 djm 2249: fmt_multistate_int(int val, const struct multistate *m)
2250: {
2251: u_int i;
2252:
2253: for (i = 0; m[i].key != NULL; i++) {
2254: if (m[i].value == val)
2255: return m[i].key;
2256: }
2257: return "UNKNOWN";
2258: }
2259:
2260: static const char *
1.182 dtucker 2261: fmt_intarg(ServerOpCodes code, int val)
2262: {
1.221 djm 2263: if (val == -1)
2264: return "unset";
2265: switch (code) {
2266: case sAddressFamily:
2267: return fmt_multistate_int(val, multistate_addressfamily);
2268: case sPermitRootLogin:
2269: return fmt_multistate_int(val, multistate_permitrootlogin);
2270: case sGatewayPorts:
2271: return fmt_multistate_int(val, multistate_gatewayports);
2272: case sCompression:
2273: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2274: case sAllowTcpForwarding:
2275: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2276: case sAllowStreamLocalForwarding:
2277: return fmt_multistate_int(val, multistate_tcpfwd);
1.256 djm 2278: case sFingerprintHash:
2279: return ssh_digest_alg_name(val);
1.221 djm 2280: default:
2281: switch (val) {
2282: case 0:
2283: return "no";
2284: case 1:
2285: return "yes";
2286: default:
2287: return "UNKNOWN";
2288: }
1.182 dtucker 2289: }
2290: }
2291:
2292: static void
2293: dump_cfg_int(ServerOpCodes code, int val)
2294: {
2295: printf("%s %d\n", lookup_opcode_name(code), val);
2296: }
2297:
2298: static void
1.263 dtucker 2299: dump_cfg_oct(ServerOpCodes code, int val)
2300: {
2301: printf("%s 0%o\n", lookup_opcode_name(code), val);
2302: }
2303:
2304: static void
1.182 dtucker 2305: dump_cfg_fmtint(ServerOpCodes code, int val)
2306: {
2307: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2308: }
2309:
2310: static void
2311: dump_cfg_string(ServerOpCodes code, const char *val)
2312: {
1.257 djm 2313: printf("%s %s\n", lookup_opcode_name(code),
2314: val == NULL ? "none" : val);
1.182 dtucker 2315: }
2316:
2317: static void
2318: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2319: {
2320: u_int i;
2321:
2322: for (i = 0; i < count; i++)
1.219 djm 2323: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2324: }
2325:
2326: static void
2327: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2328: {
2329: u_int i;
2330:
1.291 djm 2331: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2332: return;
1.219 djm 2333: printf("%s", lookup_opcode_name(code));
2334: for (i = 0; i < count; i++)
2335: printf(" %s", vals[i]);
1.291 djm 2336: if (code == sAuthenticationMethods && count == 0)
2337: printf(" any");
1.219 djm 2338: printf("\n");
1.182 dtucker 2339: }
2340:
1.315 djm 2341: static char *
2342: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2343: {
1.315 djm 2344: int r;
1.182 dtucker 2345: struct addrinfo *ai;
1.315 djm 2346: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2347: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2348:
1.263 dtucker 2349: /*
2350: * ListenAddress must be after Port. add_one_listen_addr pushes
2351: * addresses onto a stack, so to maintain ordering we need to
2352: * print these in reverse order.
2353: */
1.315 djm 2354: for (ai = la->addrs; ai; ai = ai->ai_next) {
2355: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2356: sizeof(addr), port, sizeof(port),
2357: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2358: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2359: continue;
2360: }
2361: laddr2 = laddr1;
2362: if (ai->ai_family == AF_INET6) {
2363: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2364: addr, port,
2365: la->rdomain == NULL ? "" : " rdomain ",
2366: la->rdomain == NULL ? "" : la->rdomain,
2367: laddr2);
1.182 dtucker 2368: } else {
1.315 djm 2369: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2370: addr, port,
2371: la->rdomain == NULL ? "" : " rdomain ",
2372: la->rdomain == NULL ? "" : la->rdomain,
2373: laddr2);
1.182 dtucker 2374: }
1.315 djm 2375: free(laddr2);
2376: }
2377: return laddr1;
2378: }
2379:
2380: void
2381: dump_config(ServerOptions *o)
2382: {
2383: char *s;
2384: u_int i;
2385:
2386: /* these are usually at the top of the config */
2387: for (i = 0; i < o->num_ports; i++)
2388: printf("port %d\n", o->ports[i]);
2389: dump_cfg_fmtint(sAddressFamily, o->address_family);
2390:
2391: for (i = 0; i < o->num_listen_addrs; i++) {
2392: s = format_listen_addrs(&o->listen_addrs[i]);
2393: printf("%s", s);
2394: free(s);
1.182 dtucker 2395: }
2396:
2397: /* integer arguments */
2398: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2399: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2400: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2401: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2402: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2403: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2404: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2405:
2406: /* formatted integer arguments */
2407: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2408: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2409: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2410: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2411: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2412: o->hostbased_uses_name_from_packet_only);
2413: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2414: #ifdef KRB5
1.182 dtucker 2415: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2416: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2417: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2418: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2419: #endif
2420: #ifdef GSSAPI
1.182 dtucker 2421: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2422: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2423: #endif
1.182 dtucker 2424: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2425: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2426: o->kbd_interactive_authentication);
2427: dump_cfg_fmtint(sChallengeResponseAuthentication,
2428: o->challenge_response_authentication);
2429: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2430: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2431: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2432: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2433: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2434: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2435: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2436: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2437: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2438: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2439: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2440: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2441: dump_cfg_fmtint(sUseDNS, o->use_dns);
2442: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2443: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2444: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2445: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2446: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2447: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2448: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2449:
2450: /* string arguments */
2451: dump_cfg_string(sPidFile, o->pid_file);
2452: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.252 djm 2453: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
2454: dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
1.182 dtucker 2455: dump_cfg_string(sBanner, o->banner);
2456: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2457: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2458: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2459: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 2460: dump_cfg_string(sAuthorizedPrincipalsFile,
2461: o->authorized_principals_file);
1.261 dtucker 2462: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2463: ? "none" : o->version_addendum);
1.231 djm 2464: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2465: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2466: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2467: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2468: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.252 djm 2469: dump_cfg_string(sKexAlgorithms,
1.253 djm 2470: o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
1.258 djm 2471: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
2472: o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
1.276 markus 2473: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
2474: o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG);
1.258 djm 2475: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ?
2476: o->pubkey_key_types : KEX_DEFAULT_PK_ALG);
1.316 djm 2477: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2478:
2479: /* string arguments requiring a lookup */
2480: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2481: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2482:
2483: /* string array arguments */
1.219 djm 2484: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2485: o->authorized_keys_files);
1.182 dtucker 2486: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2487: o->host_key_files);
1.261 dtucker 2488: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2489: o->host_cert_files);
1.182 dtucker 2490: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2491: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2492: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2493: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2494: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2495: dump_cfg_strarray_oneline(sAuthenticationMethods,
2496: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2497:
2498: /* other arguments */
2499: for (i = 0; i < o->num_subsystems; i++)
2500: printf("subsystem %s %s\n", o->subsystem_name[i],
2501: o->subsystem_args[i]);
2502:
2503: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2504: o->max_startups_rate, o->max_startups);
2505:
1.318 djm 2506: s = NULL;
2507: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2508: if (tunmode_desc[i].val == o->permit_tun) {
2509: s = tunmode_desc[i].text;
2510: break;
2511: }
1.318 djm 2512: }
1.182 dtucker 2513: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2514:
1.214 stevesk 2515: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2516: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2517:
1.284 dtucker 2518: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2519: o->rekey_interval);
1.182 dtucker 2520:
1.310 djm 2521: printf("permitopen");
2522: if (o->num_permitted_opens == 0)
2523: printf(" any");
2524: else {
2525: for (i = 0; i < o->num_permitted_opens; i++)
2526: printf(" %s", o->permitted_opens[i]);
1.329 ! djm 2527: }
! 2528: printf("\n");
! 2529: printf("permitremoteopen");
! 2530: if (o->num_permitted_remote_opens == 0)
! 2531: printf(" any");
! 2532: else {
! 2533: for (i = 0; i < o->num_permitted_remote_opens; i++)
! 2534: printf(" %s", o->permitted_remote_opens[i]);
1.310 djm 2535: }
2536: printf("\n");
1.1 deraadt 2537: }
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