Annotation of src/usr.bin/ssh/servconf.c, Revision 1.373
1.226 dtucker 1:
1.373 ! dtucker 2: /* $OpenBSD: servconf.c,v 1.372 2021/01/09 12:10:02 dtucker Exp $ */
1.1 deraadt 3: /*
1.26 deraadt 4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.34 markus 6: *
1.51 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 12: */
1.1 deraadt 13:
1.152 stevesk 14: #include <sys/types.h>
15: #include <sys/socket.h>
1.179 djm 16: #include <sys/queue.h>
1.315 djm 17: #include <sys/sysctl.h>
1.366 markus 18: #include <sys/stat.h>
1.154 stevesk 19:
1.213 djm 20: #include <netinet/in.h>
21: #include <netinet/ip.h>
1.315 djm 22: #include <net/route.h>
1.213 djm 23:
1.235 dtucker 24: #include <ctype.h>
1.360 djm 25: #include <glob.h>
1.154 stevesk 26: #include <netdb.h>
1.165 dtucker 27: #include <pwd.h>
1.162 stevesk 28: #include <stdio.h>
1.161 stevesk 29: #include <stdlib.h>
1.160 stevesk 30: #include <string.h>
1.164 deraadt 31: #include <signal.h>
1.155 stevesk 32: #include <unistd.h>
1.259 deraadt 33: #include <limits.h>
1.164 deraadt 34: #include <stdarg.h>
1.182 dtucker 35: #include <errno.h>
1.236 dtucker 36: #include <util.h>
1.1 deraadt 37:
1.164 deraadt 38: #include "xmalloc.h"
1.1 deraadt 39: #include "ssh.h"
1.62 markus 40: #include "log.h"
1.338 markus 41: #include "sshbuf.h"
1.251 millert 42: #include "misc.h"
1.1 deraadt 43: #include "servconf.h"
1.33 markus 44: #include "compat.h"
1.60 markus 45: #include "pathnames.h"
1.62 markus 46: #include "cipher.h"
1.339 markus 47: #include "sshkey.h"
1.66 markus 48: #include "kex.h"
49: #include "mac.h"
1.153 dtucker 50: #include "match.h"
1.156 dtucker 51: #include "channels.h"
1.165 dtucker 52: #include "groupaccess.h"
1.226 dtucker 53: #include "canohost.h"
54: #include "packet.h"
1.338 markus 55: #include "ssherr.h"
1.232 djm 56: #include "hostfile.h"
57: #include "auth.h"
1.252 djm 58: #include "myproposal.h"
1.256 djm 59: #include "digest.h"
1.345 djm 60:
1.315 djm 61: static void add_listen_addr(ServerOptions *, const char *,
62: const char *, int);
63: static void add_one_listen_addr(ServerOptions *, const char *,
64: const char *, int);
1.364 djm 65: static void parse_server_config_depth(ServerOptions *options,
66: const char *filename, struct sshbuf *conf, struct include_list *includes,
1.360 djm 67: struct connection_info *connectinfo, int flags, int *activep, int depth);
1.29 markus 68:
1.102 provos 69: /* Use of privilege separation or not */
70: extern int use_privsep;
1.338 markus 71: extern struct sshbuf *cfg;
1.62 markus 72:
1.1 deraadt 73: /* Initializes the server options to their default values. */
74:
1.34 markus 75: void
1.25 markus 76: initialize_server_options(ServerOptions *options)
1.1 deraadt 77: {
1.25 markus 78: memset(options, 0, sizeof(*options));
1.29 markus 79: options->num_ports = 0;
80: options->ports_from_cmdline = 0;
1.266 dtucker 81: options->queued_listen_addrs = NULL;
82: options->num_queued_listens = 0;
1.29 markus 83: options->listen_addrs = NULL;
1.315 djm 84: options->num_listen_addrs = 0;
1.138 djm 85: options->address_family = -1;
1.316 djm 86: options->routing_domain = NULL;
1.54 markus 87: options->num_host_key_files = 0;
1.203 djm 88: options->num_host_cert_files = 0;
1.240 markus 89: options->host_key_agent = NULL;
1.36 markus 90: options->pid_file = NULL;
1.25 markus 91: options->login_grace_time = -1;
1.279 chris 92: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 93: options->ignore_rhosts = -1;
94: options->ignore_user_known_hosts = -1;
95: options->print_motd = -1;
1.72 stevesk 96: options->print_lastlog = -1;
1.25 markus 97: options->x11_forwarding = -1;
98: options->x11_display_offset = -1;
1.99 stevesk 99: options->x11_use_localhost = -1;
1.244 djm 100: options->permit_tty = -1;
1.250 djm 101: options->permit_user_rc = -1;
1.42 markus 102: options->xauth_location = NULL;
1.25 markus 103: options->strict_modes = -1;
1.129 markus 104: options->tcp_keep_alive = -1;
1.101 markus 105: options->log_facility = SYSLOG_FACILITY_NOT_SET;
106: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.370 djm 107: options->num_log_verbose = 0;
108: options->log_verbose = NULL;
1.75 markus 109: options->hostbased_authentication = -1;
110: options->hostbased_uses_name_from_packet_only = -1;
1.258 djm 111: options->hostbased_key_types = NULL;
1.276 markus 112: options->hostkeyalgorithms = NULL;
1.54 markus 113: options->pubkey_authentication = -1;
1.354 djm 114: options->pubkey_auth_options = -1;
1.258 djm 115: options->pubkey_key_types = NULL;
1.25 markus 116: options->kerberos_authentication = -1;
117: options->kerberos_or_local_passwd = -1;
118: options->kerberos_ticket_cleanup = -1;
1.130 jakob 119: options->kerberos_get_afs_token = -1;
1.125 markus 120: options->gss_authentication=-1;
121: options->gss_cleanup_creds = -1;
1.271 djm 122: options->gss_strict_acceptor = -1;
1.25 markus 123: options->password_authentication = -1;
1.52 markus 124: options->kbd_interactive_authentication = -1;
1.80 markus 125: options->challenge_response_authentication = -1;
1.25 markus 126: options->permit_empty_passwd = -1;
1.113 markus 127: options->permit_user_env = -1;
1.367 djm 128: options->permit_user_env_allowlist = NULL;
1.111 markus 129: options->compression = -1;
1.235 dtucker 130: options->rekey_limit = -1;
131: options->rekey_interval = -1;
1.53 markus 132: options->allow_tcp_forwarding = -1;
1.251 millert 133: options->allow_streamlocal_forwarding = -1;
1.178 pyr 134: options->allow_agent_forwarding = -1;
1.25 markus 135: options->num_allow_users = 0;
136: options->num_deny_users = 0;
137: options->num_allow_groups = 0;
138: options->num_deny_groups = 0;
1.33 markus 139: options->ciphers = NULL;
1.66 markus 140: options->macs = NULL;
1.211 djm 141: options->kex_algorithms = NULL;
1.341 djm 142: options->ca_sign_algorithms = NULL;
1.251 millert 143: options->fwd_opts.gateway_ports = -1;
144: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
145: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 146: options->num_subsystems = 0;
1.50 markus 147: options->max_startups_begin = -1;
148: options->max_startups_rate = -1;
1.46 markus 149: options->max_startups = -1;
1.372 dtucker 150: options->per_source_max_startups = -1;
151: options->per_source_masklen_ipv4 = -1;
152: options->per_source_masklen_ipv6 = -1;
1.133 dtucker 153: options->max_authtries = -1;
1.180 djm 154: options->max_sessions = -1;
1.57 markus 155: options->banner = NULL;
1.122 markus 156: options->use_dns = -1;
1.77 beck 157: options->client_alive_interval = -1;
158: options->client_alive_count_max = -1;
1.219 djm 159: options->num_authkeys_files = 0;
1.131 djm 160: options->num_accept_env = 0;
1.332 djm 161: options->num_setenv = 0;
1.145 reyk 162: options->permit_tun = -1;
1.310 djm 163: options->permitted_opens = NULL;
1.330 djm 164: options->permitted_listens = NULL;
1.158 dtucker 165: options->adm_forced_command = NULL;
1.176 djm 166: options->chroot_directory = NULL;
1.231 djm 167: options->authorized_keys_command = NULL;
168: options->authorized_keys_command_user = NULL;
1.204 djm 169: options->revoked_keys_file = NULL;
1.355 djm 170: options->sk_provider = NULL;
1.204 djm 171: options->trusted_user_ca_keys = NULL;
1.208 djm 172: options->authorized_principals_file = NULL;
1.270 djm 173: options->authorized_principals_command = NULL;
174: options->authorized_principals_command_user = NULL;
1.213 djm 175: options->ip_qos_interactive = -1;
176: options->ip_qos_bulk = -1;
1.225 djm 177: options->version_addendum = NULL;
1.256 djm 178: options->fingerprint_hash = -1;
1.301 djm 179: options->disable_forwarding = -1;
1.309 djm 180: options->expose_userauth_info = -1;
1.1 deraadt 181: }
182:
1.257 djm 183: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
184: static int
185: option_clear_or_none(const char *o)
186: {
187: return o == NULL || strcasecmp(o, "none") == 0;
188: }
189:
1.282 djm 190: static void
191: assemble_algorithms(ServerOptions *o)
192: {
1.341 djm 193: char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
1.358 dtucker 194: char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
1.340 djm 195: int r;
1.335 djm 196:
197: all_cipher = cipher_alg_list(',', 0);
198: all_mac = mac_alg_list(',');
199: all_kex = kex_alg_list(',');
200: all_key = sshkey_alg_list(0, 0, 1, ',');
1.341 djm 201: all_sig = sshkey_alg_list(0, 1, 1, ',');
1.358 dtucker 202: /* remove unsupported algos from default lists */
1.367 djm 203: def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
204: def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
205: def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
206: def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
207: def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
1.340 djm 208: #define ASSEMBLE(what, defaults, all) \
209: do { \
210: if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
1.371 djm 211: fatal_fr(r, "%s", #what); \
1.340 djm 212: } while (0)
1.358 dtucker 213: ASSEMBLE(ciphers, def_cipher, all_cipher);
214: ASSEMBLE(macs, def_mac, all_mac);
215: ASSEMBLE(kex_algorithms, def_kex, all_kex);
216: ASSEMBLE(hostkeyalgorithms, def_key, all_key);
217: ASSEMBLE(hostbased_key_types, def_key, all_key);
218: ASSEMBLE(pubkey_key_types, def_key, all_key);
219: ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
1.340 djm 220: #undef ASSEMBLE
1.335 djm 221: free(all_cipher);
222: free(all_mac);
223: free(all_kex);
224: free(all_key);
1.341 djm 225: free(all_sig);
1.358 dtucker 226: free(def_cipher);
227: free(def_mac);
228: free(def_kex);
229: free(def_key);
230: free(def_sig);
1.282 djm 231: }
232:
1.314 djm 233: static void
1.344 djm 234: array_append2(const char *file, const int line, const char *directive,
235: char ***array, int **iarray, u_int *lp, const char *s, int i)
1.314 djm 236: {
237:
238: if (*lp >= INT_MAX)
239: fatal("%s line %d: Too many %s entries", file, line, directive);
240:
1.344 djm 241: if (iarray != NULL) {
242: *iarray = xrecallocarray(*iarray, *lp, *lp + 1,
243: sizeof(**iarray));
244: (*iarray)[*lp] = i;
245: }
246:
1.314 djm 247: *array = xrecallocarray(*array, *lp, *lp + 1, sizeof(**array));
248: (*array)[*lp] = xstrdup(s);
249: (*lp)++;
250: }
251:
1.344 djm 252: static void
253: array_append(const char *file, const int line, const char *directive,
254: char ***array, u_int *lp, const char *s)
255: {
256: array_append2(file, line, directive, array, NULL, lp, s, 0);
257: }
258:
1.314 djm 259: void
260: servconf_add_hostkey(const char *file, const int line,
1.344 djm 261: ServerOptions *options, const char *path, int userprovided)
1.314 djm 262: {
263: char *apath = derelativise_path(path);
264:
1.344 djm 265: array_append2(file, line, "HostKey",
266: &options->host_key_files, &options->host_key_file_userprovided,
267: &options->num_host_key_files, apath, userprovided);
1.314 djm 268: free(apath);
269: }
270:
271: void
272: servconf_add_hostcert(const char *file, const int line,
273: ServerOptions *options, const char *path)
274: {
275: char *apath = derelativise_path(path);
276:
277: array_append(file, line, "HostCertificate",
278: &options->host_cert_files, &options->num_host_cert_files, apath);
279: free(apath);
280: }
281:
1.34 markus 282: void
1.25 markus 283: fill_default_server_options(ServerOptions *options)
1.1 deraadt 284: {
1.314 djm 285: u_int i;
1.257 djm 286:
1.54 markus 287: if (options->num_host_key_files == 0) {
1.293 naddy 288: /* fill default hostkeys */
1.314 djm 289: servconf_add_hostkey("[default]", 0, options,
1.344 djm 290: _PATH_HOST_RSA_KEY_FILE, 0);
1.314 djm 291: servconf_add_hostkey("[default]", 0, options,
1.344 djm 292: _PATH_HOST_ECDSA_KEY_FILE, 0);
1.314 djm 293: servconf_add_hostkey("[default]", 0, options,
1.344 djm 294: _PATH_HOST_ED25519_KEY_FILE, 0);
1.326 markus 295: #ifdef WITH_XMSS
1.325 markus 296: servconf_add_hostkey("[default]", 0, options,
1.344 djm 297: _PATH_HOST_XMSS_KEY_FILE, 0);
1.326 markus 298: #endif /* WITH_XMSS */
1.54 markus 299: }
1.203 djm 300: /* No certificates by default */
1.29 markus 301: if (options->num_ports == 0)
302: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 303: if (options->address_family == -1)
304: options->address_family = AF_UNSPEC;
1.29 markus 305: if (options->listen_addrs == NULL)
1.315 djm 306: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 307: if (options->pid_file == NULL)
1.257 djm 308: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 309: if (options->login_grace_time == -1)
1.115 stevesk 310: options->login_grace_time = 120;
1.67 markus 311: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 312: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 313: if (options->ignore_rhosts == -1)
1.30 markus 314: options->ignore_rhosts = 1;
1.25 markus 315: if (options->ignore_user_known_hosts == -1)
316: options->ignore_user_known_hosts = 0;
317: if (options->print_motd == -1)
318: options->print_motd = 1;
1.72 stevesk 319: if (options->print_lastlog == -1)
320: options->print_lastlog = 1;
1.25 markus 321: if (options->x11_forwarding == -1)
1.30 markus 322: options->x11_forwarding = 0;
1.25 markus 323: if (options->x11_display_offset == -1)
1.30 markus 324: options->x11_display_offset = 10;
1.99 stevesk 325: if (options->x11_use_localhost == -1)
326: options->x11_use_localhost = 1;
1.42 markus 327: if (options->xauth_location == NULL)
1.257 djm 328: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 329: if (options->permit_tty == -1)
330: options->permit_tty = 1;
1.250 djm 331: if (options->permit_user_rc == -1)
332: options->permit_user_rc = 1;
1.25 markus 333: if (options->strict_modes == -1)
334: options->strict_modes = 1;
1.129 markus 335: if (options->tcp_keep_alive == -1)
336: options->tcp_keep_alive = 1;
1.101 markus 337: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 338: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 339: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 340: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 341: if (options->hostbased_authentication == -1)
342: options->hostbased_authentication = 0;
343: if (options->hostbased_uses_name_from_packet_only == -1)
344: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 345: if (options->pubkey_authentication == -1)
346: options->pubkey_authentication = 1;
1.354 djm 347: if (options->pubkey_auth_options == -1)
348: options->pubkey_auth_options = 0;
1.25 markus 349: if (options->kerberos_authentication == -1)
1.107 markus 350: options->kerberos_authentication = 0;
1.25 markus 351: if (options->kerberos_or_local_passwd == -1)
352: options->kerberos_or_local_passwd = 1;
353: if (options->kerberos_ticket_cleanup == -1)
354: options->kerberos_ticket_cleanup = 1;
1.130 jakob 355: if (options->kerberos_get_afs_token == -1)
356: options->kerberos_get_afs_token = 0;
1.125 markus 357: if (options->gss_authentication == -1)
358: options->gss_authentication = 0;
359: if (options->gss_cleanup_creds == -1)
360: options->gss_cleanup_creds = 1;
1.271 djm 361: if (options->gss_strict_acceptor == -1)
1.302 djm 362: options->gss_strict_acceptor = 1;
1.25 markus 363: if (options->password_authentication == -1)
364: options->password_authentication = 1;
1.52 markus 365: if (options->kbd_interactive_authentication == -1)
366: options->kbd_interactive_authentication = 0;
1.80 markus 367: if (options->challenge_response_authentication == -1)
368: options->challenge_response_authentication = 1;
1.25 markus 369: if (options->permit_empty_passwd == -1)
1.30 markus 370: options->permit_empty_passwd = 0;
1.334 djm 371: if (options->permit_user_env == -1) {
1.113 markus 372: options->permit_user_env = 0;
1.367 djm 373: options->permit_user_env_allowlist = NULL;
1.334 djm 374: }
1.111 markus 375: if (options->compression == -1)
1.359 dtucker 376: #ifdef WITH_ZLIB
1.337 sf 377: options->compression = COMP_DELAYED;
1.359 dtucker 378: #else
379: options->compression = COMP_NONE;
380: #endif
381:
1.235 dtucker 382: if (options->rekey_limit == -1)
383: options->rekey_limit = 0;
384: if (options->rekey_interval == -1)
385: options->rekey_interval = 0;
1.53 markus 386: if (options->allow_tcp_forwarding == -1)
1.233 djm 387: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 388: if (options->allow_streamlocal_forwarding == -1)
389: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 390: if (options->allow_agent_forwarding == -1)
391: options->allow_agent_forwarding = 1;
1.251 millert 392: if (options->fwd_opts.gateway_ports == -1)
393: options->fwd_opts.gateway_ports = 0;
1.46 markus 394: if (options->max_startups == -1)
1.234 dtucker 395: options->max_startups = 100;
1.50 markus 396: if (options->max_startups_rate == -1)
1.234 dtucker 397: options->max_startups_rate = 30; /* 30% */
1.50 markus 398: if (options->max_startups_begin == -1)
1.234 dtucker 399: options->max_startups_begin = 10;
1.372 dtucker 400: if (options->per_source_max_startups == -1)
401: options->per_source_max_startups = INT_MAX;
402: if (options->per_source_masklen_ipv4 == -1)
403: options->per_source_masklen_ipv4 = 32;
404: if (options->per_source_masklen_ipv6 == -1)
405: options->per_source_masklen_ipv6 = 128;
1.133 dtucker 406: if (options->max_authtries == -1)
407: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 408: if (options->max_sessions == -1)
409: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 410: if (options->use_dns == -1)
1.260 deraadt 411: options->use_dns = 0;
1.77 beck 412: if (options->client_alive_interval == -1)
1.95 deraadt 413: options->client_alive_interval = 0;
1.77 beck 414: if (options->client_alive_count_max == -1)
415: options->client_alive_count_max = 3;
1.219 djm 416: if (options->num_authkeys_files == 0) {
1.314 djm 417: array_append("[default]", 0, "AuthorizedKeysFiles",
418: &options->authorized_keys_files,
419: &options->num_authkeys_files,
420: _PATH_SSH_USER_PERMITTED_KEYS);
421: array_append("[default]", 0, "AuthorizedKeysFiles",
422: &options->authorized_keys_files,
423: &options->num_authkeys_files,
424: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 425: }
1.145 reyk 426: if (options->permit_tun == -1)
1.146 reyk 427: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 428: if (options->ip_qos_interactive == -1)
1.327 job 429: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 430: if (options->ip_qos_bulk == -1)
1.327 job 431: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 432: if (options->version_addendum == NULL)
433: options->version_addendum = xstrdup("");
1.251 millert 434: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
435: options->fwd_opts.streamlocal_bind_mask = 0177;
436: if (options->fwd_opts.streamlocal_bind_unlink == -1)
437: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 438: if (options->fingerprint_hash == -1)
439: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 440: if (options->disable_forwarding == -1)
441: options->disable_forwarding = 0;
1.309 djm 442: if (options->expose_userauth_info == -1)
443: options->expose_userauth_info = 0;
1.355 djm 444: if (options->sk_provider == NULL)
445: options->sk_provider = xstrdup("internal");
1.277 djm 446:
1.282 djm 447: assemble_algorithms(options);
1.277 djm 448:
1.285 djm 449: /* Turn privilege separation and sandboxing on by default */
1.102 provos 450: if (use_privsep == -1)
1.285 djm 451: use_privsep = PRIVSEP_ON;
1.257 djm 452:
453: #define CLEAR_ON_NONE(v) \
454: do { \
455: if (option_clear_or_none(v)) { \
456: free(v); \
457: v = NULL; \
458: } \
459: } while(0)
460: CLEAR_ON_NONE(options->pid_file);
461: CLEAR_ON_NONE(options->xauth_location);
462: CLEAR_ON_NONE(options->banner);
463: CLEAR_ON_NONE(options->trusted_user_ca_keys);
464: CLEAR_ON_NONE(options->revoked_keys_file);
1.355 djm 465: CLEAR_ON_NONE(options->sk_provider);
1.267 djm 466: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 467: CLEAR_ON_NONE(options->adm_forced_command);
468: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 469: CLEAR_ON_NONE(options->routing_domain);
1.357 djm 470: CLEAR_ON_NONE(options->host_key_agent);
1.257 djm 471: for (i = 0; i < options->num_host_key_files; i++)
472: CLEAR_ON_NONE(options->host_key_files[i]);
473: for (i = 0; i < options->num_host_cert_files; i++)
474: CLEAR_ON_NONE(options->host_cert_files[i]);
475: #undef CLEAR_ON_NONE
1.291 djm 476:
477: /* Similar handling for AuthenticationMethods=any */
478: if (options->num_auth_methods == 1 &&
479: strcmp(options->auth_methods[0], "any") == 0) {
480: free(options->auth_methods[0]);
481: options->auth_methods[0] = NULL;
482: options->num_auth_methods = 0;
483: }
1.1 deraadt 484: }
485:
486: /* Keyword tokens. */
1.25 markus 487: typedef enum {
488: sBadOption, /* == unknown option */
1.293 naddy 489: sPort, sHostKeyFile, sLoginGraceTime,
1.370 djm 490: sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
1.25 markus 491: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 492: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 493: sPasswordAuthentication, sKbdInteractiveAuthentication,
494: sListenAddress, sAddressFamily,
1.72 stevesk 495: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 496: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 497: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 498: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 499: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 500: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 501: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
502: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 503: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 504: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.372 dtucker 505: sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
1.258 djm 506: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 507: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
1.332 djm 508: sAcceptEnv, sSetEnv, sPermitTunnel,
1.330 djm 509: sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
1.200 dtucker 510: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.360 djm 511: sHostCertificate, sInclude,
1.208 djm 512: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 513: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.341 djm 514: sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 515: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 516: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 517: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 518: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.355 djm 519: sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
1.295 djm 520: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 521: } ServerOpCodes;
522:
1.360 djm 523: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
524: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
525: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
526: #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
1.365 djm 527: #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
1.153 dtucker 528:
1.1 deraadt 529: /* Textual representation of the tokens. */
1.25 markus 530: static struct {
531: const char *name;
532: ServerOpCodes opcode;
1.153 dtucker 533: u_int flags;
1.25 markus 534: } keywords[] = {
1.153 dtucker 535: { "port", sPort, SSHCFG_GLOBAL },
536: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
537: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 538: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 539: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 540: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 541: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 542: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 543: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 544: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 545: { "loglevel", sLogLevel, SSHCFG_ALL },
1.370 djm 546: { "logverbose", sLogVerbose, SSHCFG_ALL },
1.153 dtucker 547: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 548: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 549: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 550: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 551: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 552: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 553: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 554: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 555: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.354 djm 556: { "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
1.153 dtucker 557: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 558: #ifdef KRB5
1.168 dtucker 559: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 560: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
561: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
562: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 563: #else
1.168 dtucker 564: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 565: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
566: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
567: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 568: #endif
1.153 dtucker 569: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
570: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 571: #ifdef GSSAPI
1.168 dtucker 572: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 573: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 574: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 575: #else
1.168 dtucker 576: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 577: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 578: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 579: #endif
1.168 dtucker 580: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
581: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 582: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 583: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
584: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
585: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
586: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
587: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
588: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
1.362 djm 589: { "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
1.153 dtucker 590: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 591: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
592: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
593: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 594: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
595: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 596: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 597: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 598: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 599: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 600: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 601: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
602: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
603: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 604: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 605: { "allowusers", sAllowUsers, SSHCFG_ALL },
606: { "denyusers", sDenyUsers, SSHCFG_ALL },
607: { "allowgroups", sAllowGroups, SSHCFG_ALL },
608: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 609: { "ciphers", sCiphers, SSHCFG_GLOBAL },
610: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 611: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 612: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
613: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
614: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.372 dtucker 615: { "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
616: { "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
1.184 dtucker 617: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 618: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 619: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 620: { "usedns", sUseDNS, SSHCFG_GLOBAL },
621: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
622: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 623: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
624: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 625: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 626: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 627: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 628: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.332 djm 629: { "setenv", sSetEnv, SSHCFG_ALL },
1.209 djm 630: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 631: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 632: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 633: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 634: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.330 djm 635: { "permitlisten", sPermitListen, SSHCFG_ALL },
1.158 dtucker 636: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 637: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 638: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 639: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
640: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 641: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 642: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.360 djm 643: { "include", sInclude, SSHCFG_ALL },
1.213 djm 644: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 645: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
646: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 647: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
648: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 649: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 650: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 651: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
652: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
653: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 654: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 655: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 656: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 657: { "rdomain", sRDomain, SSHCFG_ALL },
1.342 djm 658: { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
1.355 djm 659: { "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
1.153 dtucker 660: { NULL, sBadOption, 0 }
1.1 deraadt 661: };
662:
1.182 dtucker 663: static struct {
664: int val;
665: char *text;
666: } tunmode_desc[] = {
667: { SSH_TUNMODE_NO, "no" },
668: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
669: { SSH_TUNMODE_ETHERNET, "ethernet" },
670: { SSH_TUNMODE_YES, "yes" },
671: { -1, NULL }
672: };
673:
1.329 djm 674: /* Returns an opcode name from its number */
675:
676: static const char *
677: lookup_opcode_name(ServerOpCodes code)
678: {
679: u_int i;
680:
681: for (i = 0; keywords[i].name != NULL; i++)
682: if (keywords[i].opcode == code)
683: return(keywords[i].name);
684: return "UNKNOWN";
685: }
686:
687:
1.27 markus 688: /*
1.73 stevesk 689: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 690: */
1.1 deraadt 691:
1.34 markus 692: static ServerOpCodes
1.25 markus 693: parse_token(const char *cp, const char *filename,
1.153 dtucker 694: int linenum, u_int *flags)
1.1 deraadt 695: {
1.55 markus 696: u_int i;
1.1 deraadt 697:
1.25 markus 698: for (i = 0; keywords[i].name; i++)
1.153 dtucker 699: if (strcasecmp(cp, keywords[i].name) == 0) {
700: *flags = keywords[i].flags;
1.25 markus 701: return keywords[i].opcode;
1.153 dtucker 702: }
1.25 markus 703:
1.78 stevesk 704: error("%s: line %d: Bad configuration option: %s",
705: filename, linenum, cp);
1.25 markus 706: return sBadOption;
1.1 deraadt 707: }
708:
1.202 djm 709: char *
710: derelativise_path(const char *path)
711: {
1.259 deraadt 712: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 713:
1.257 djm 714: if (strcasecmp(path, "none") == 0)
715: return xstrdup("none");
1.202 djm 716: expanded = tilde_expand_filename(path, getuid());
1.343 djm 717: if (path_absolute(expanded))
1.202 djm 718: return expanded;
1.207 djm 719: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.371 djm 720: fatal_f("getcwd: %s", strerror(errno));
1.202 djm 721: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 722: free(expanded);
1.202 djm 723: return ret;
724: }
725:
1.84 itojun 726: static void
1.315 djm 727: add_listen_addr(ServerOptions *options, const char *addr,
728: const char *rdomain, int port)
1.74 stevesk 729: {
1.142 djm 730: u_int i;
1.74 stevesk 731:
1.315 djm 732: if (port > 0)
733: add_one_listen_addr(options, addr, rdomain, port);
734: else {
735: for (i = 0; i < options->num_ports; i++) {
736: add_one_listen_addr(options, addr, rdomain,
737: options->ports[i]);
738: }
739: }
1.74 stevesk 740: }
741:
1.84 itojun 742: static void
1.315 djm 743: add_one_listen_addr(ServerOptions *options, const char *addr,
744: const char *rdomain, int port)
1.29 markus 745: {
746: struct addrinfo hints, *ai, *aitop;
747: char strport[NI_MAXSERV];
748: int gaierr;
1.315 djm 749: u_int i;
750:
751: /* Find listen_addrs entry for this rdomain */
752: for (i = 0; i < options->num_listen_addrs; i++) {
753: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
754: break;
755: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
756: continue;
757: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
758: break;
759: }
760: if (i >= options->num_listen_addrs) {
761: /* No entry for this rdomain; allocate one */
762: if (i >= INT_MAX)
1.371 djm 763: fatal_f("too many listen addresses");
1.315 djm 764: options->listen_addrs = xrecallocarray(options->listen_addrs,
765: options->num_listen_addrs, options->num_listen_addrs + 1,
766: sizeof(*options->listen_addrs));
767: i = options->num_listen_addrs++;
768: if (rdomain != NULL)
769: options->listen_addrs[i].rdomain = xstrdup(rdomain);
770: }
771: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 772:
1.74 stevesk 773: memset(&hints, 0, sizeof(hints));
1.138 djm 774: hints.ai_family = options->address_family;
1.74 stevesk 775: hints.ai_socktype = SOCK_STREAM;
776: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 777: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 778: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
779: fatal("bad addr or host: %s (%s)",
780: addr ? addr : "<NULL>",
1.173 dtucker 781: ssh_gai_strerror(gaierr));
1.74 stevesk 782: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
783: ;
1.315 djm 784: ai->ai_next = options->listen_addrs[i].addrs;
785: options->listen_addrs[i].addrs = aitop;
786: }
787:
788: /* Returns nonzero if the routing domain name is valid */
789: static int
790: valid_rdomain(const char *name)
791: {
792: const char *errstr;
793: long long num;
794: struct rt_tableinfo info;
795: int mib[6];
796: size_t miblen = sizeof(mib);
797:
798: if (name == NULL)
799: return 1;
800:
801: num = strtonum(name, 0, 255, &errstr);
802: if (errstr != NULL)
803: return 0;
804:
805: /* Check whether the table actually exists */
806: memset(mib, 0, sizeof(mib));
807: mib[0] = CTL_NET;
808: mib[1] = PF_ROUTE;
809: mib[4] = NET_RT_TABLE;
810: mib[5] = (int)num;
811: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
812: return 0;
813:
814: return 1;
1.29 markus 815: }
816:
1.266 dtucker 817: /*
818: * Queue a ListenAddress to be processed once we have all of the Ports
819: * and AddressFamily options.
820: */
821: static void
1.315 djm 822: queue_listen_addr(ServerOptions *options, const char *addr,
823: const char *rdomain, int port)
1.266 dtucker 824: {
1.315 djm 825: struct queued_listenaddr *qla;
826:
827: options->queued_listen_addrs = xrecallocarray(
828: options->queued_listen_addrs,
829: options->num_queued_listens, options->num_queued_listens + 1,
830: sizeof(*options->queued_listen_addrs));
831: qla = &options->queued_listen_addrs[options->num_queued_listens++];
832: qla->addr = xstrdup(addr);
833: qla->port = port;
834: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 835: }
836:
837: /*
838: * Process queued (text) ListenAddress entries.
839: */
840: static void
841: process_queued_listen_addrs(ServerOptions *options)
842: {
843: u_int i;
1.315 djm 844: struct queued_listenaddr *qla;
1.266 dtucker 845:
846: if (options->num_ports == 0)
847: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
848: if (options->address_family == -1)
849: options->address_family = AF_UNSPEC;
850:
851: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 852: qla = &options->queued_listen_addrs[i];
853: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
854: free(qla->addr);
855: free(qla->rdomain);
1.266 dtucker 856: }
857: free(options->queued_listen_addrs);
858: options->queued_listen_addrs = NULL;
859: options->num_queued_listens = 0;
860: }
861:
1.310 djm 862: /*
1.329 djm 863: * Inform channels layer of permitopen options for a single forwarding
864: * direction (local/remote).
1.310 djm 865: */
1.329 djm 866: static void
867: process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
868: char **opens, u_int num_opens)
1.310 djm 869: {
870: u_int i;
871: int port;
1.347 dtucker 872: char *host, *arg, *oarg, ch;
1.329 djm 873: int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
874: const char *what = lookup_opcode_name(opcode);
1.310 djm 875:
1.329 djm 876: channel_clear_permission(ssh, FORWARD_ADM, where);
877: if (num_opens == 0)
1.310 djm 878: return; /* permit any */
879:
880: /* handle keywords: "any" / "none" */
1.329 djm 881: if (num_opens == 1 && strcmp(opens[0], "any") == 0)
1.310 djm 882: return;
1.329 djm 883: if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
884: channel_disable_admin(ssh, where);
1.310 djm 885: return;
886: }
887: /* Otherwise treat it as a list of permitted host:port */
1.329 djm 888: for (i = 0; i < num_opens; i++) {
889: oarg = arg = xstrdup(opens[i]);
1.348 dtucker 890: ch = '\0';
1.347 dtucker 891: host = hpdelim2(&arg, &ch);
892: if (host == NULL || ch == '/')
1.371 djm 893: fatal_f("missing host in %s", what);
1.310 djm 894: host = cleanhostname(host);
895: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.371 djm 896: fatal_f("bad port number in %s", what);
1.310 djm 897: /* Send it to channels layer */
1.329 djm 898: channel_add_permission(ssh, FORWARD_ADM,
899: where, host, port);
1.310 djm 900: free(oarg);
901: }
902: }
903:
1.329 djm 904: /*
905: * Inform channels layer of permitopen options from configuration.
906: */
907: void
908: process_permitopen(struct ssh *ssh, ServerOptions *options)
909: {
910: process_permitopen_list(ssh, sPermitOpen,
911: options->permitted_opens, options->num_permitted_opens);
1.330 djm 912: process_permitopen_list(ssh, sPermitListen,
913: options->permitted_listens,
914: options->num_permitted_listens);
1.329 djm 915: }
916:
1.226 dtucker 917: struct connection_info *
1.346 djm 918: get_connection_info(struct ssh *ssh, int populate, int use_dns)
1.226 dtucker 919: {
920: static struct connection_info ci;
921:
1.346 djm 922: if (ssh == NULL || !populate)
1.226 dtucker 923: return &ci;
1.286 djm 924: ci.host = auth_get_canonical_hostname(ssh, use_dns);
925: ci.address = ssh_remote_ipaddr(ssh);
926: ci.laddress = ssh_local_ipaddr(ssh);
927: ci.lport = ssh_local_port(ssh);
1.317 djm 928: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 929: return &ci;
930: }
931:
1.153 dtucker 932: /*
933: * The strategy for the Match blocks is that the config file is parsed twice.
934: *
935: * The first time is at startup. activep is initialized to 1 and the
936: * directives in the global context are processed and acted on. Hitting a
937: * Match directive unsets activep and the directives inside the block are
938: * checked for syntax only.
939: *
940: * The second time is after a connection has been established but before
941: * authentication. activep is initialized to 2 and global config directives
942: * are ignored since they have already been processed. If the criteria in a
943: * Match block is met, activep is set and the subsequent directives
944: * processed and actioned until EOF or another Match block unsets it. Any
945: * options set are copied into the main server config.
946: *
947: * Potential additions/improvements:
1.295 djm 948: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 949: *
950: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
951: * Match Address 192.168.0.*
952: * Tag trusted
953: * Match Group wheel
954: * Tag trusted
955: * Match Tag trusted
956: * AllowTcpForwarding yes
957: * GatewayPorts clientspecified
958: * [...]
959: *
960: * - Add a PermittedChannelRequests directive
961: * Match Group shell
962: * PermittedChannelRequests session,forwarded-tcpip
963: */
964:
965: static int
1.165 dtucker 966: match_cfg_line_group(const char *grps, int line, const char *user)
967: {
968: int result = 0;
969: struct passwd *pw;
970:
971: if (user == NULL)
972: goto out;
973:
974: if ((pw = getpwnam(user)) == NULL) {
975: debug("Can't match group at line %d because user %.100s does "
976: "not exist", line, user);
977: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
978: debug("Can't Match group because user %.100s not in any group "
979: "at line %d", user, line);
1.186 djm 980: } else if (ga_match_pattern_list(grps) != 1) {
981: debug("user %.100s does not match group list %.100s at line %d",
982: user, grps, line);
1.165 dtucker 983: } else {
1.186 djm 984: debug("user %.100s matched group list %.100s at line %d", user,
985: grps, line);
1.165 dtucker 986: result = 1;
987: }
988: out:
989: ga_free();
990: return result;
991: }
992:
1.319 dtucker 993: static void
994: match_test_missing_fatal(const char *criteria, const char *attrib)
995: {
996: fatal("'Match %s' in configuration but '%s' not in connection "
997: "test specification.", criteria, attrib);
998: }
999:
1.226 dtucker 1000: /*
1.230 dtucker 1001: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 1002: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 1003: * not match.
1.226 dtucker 1004: */
1.165 dtucker 1005: static int
1.226 dtucker 1006: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 1007: {
1.243 dtucker 1008: int result = 1, attributes = 0, port;
1.153 dtucker 1009: char *arg, *attrib, *cp = *condition;
1010:
1.226 dtucker 1011: if (ci == NULL)
1.153 dtucker 1012: debug3("checking syntax for 'Match %s'", cp);
1013: else
1.226 dtucker 1014: debug3("checking match for '%s' user %s host %s addr %s "
1015: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
1016: ci->host ? ci->host : "(null)",
1017: ci->address ? ci->address : "(null)",
1018: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 1019:
1020: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 1021: attributes++;
1022: if (strcasecmp(attrib, "all") == 0) {
1023: if (attributes != 1 ||
1024: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1025: error("'all' cannot be combined with other "
1026: "Match attributes");
1027: return -1;
1028: }
1029: *condition = cp;
1030: return 1;
1031: }
1.153 dtucker 1032: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
1033: error("Missing Match criteria for %s", attrib);
1034: return -1;
1035: }
1036: if (strcasecmp(attrib, "user") == 0) {
1.351 dtucker 1037: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.153 dtucker 1038: result = 0;
1039: continue;
1040: }
1.319 dtucker 1041: if (ci->user == NULL)
1042: match_test_missing_fatal("User", "user");
1.349 dtucker 1043: if (match_usergroup_pattern_list(ci->user, arg) != 1)
1.153 dtucker 1044: result = 0;
1045: else
1046: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 1047: "line %d", ci->user, arg, line);
1.165 dtucker 1048: } else if (strcasecmp(attrib, "group") == 0) {
1.351 dtucker 1049: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.226 dtucker 1050: result = 0;
1051: continue;
1052: }
1.319 dtucker 1053: if (ci->user == NULL)
1054: match_test_missing_fatal("Group", "user");
1.226 dtucker 1055: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 1056: case -1:
1057: return -1;
1058: case 0:
1059: result = 0;
1060: }
1.153 dtucker 1061: } else if (strcasecmp(attrib, "host") == 0) {
1.351 dtucker 1062: if (ci == NULL || (ci->test && ci->host == NULL)) {
1.153 dtucker 1063: result = 0;
1064: continue;
1065: }
1.319 dtucker 1066: if (ci->host == NULL)
1067: match_test_missing_fatal("Host", "host");
1.269 djm 1068: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 1069: result = 0;
1070: else
1071: debug("connection from %.100s matched 'Host "
1.226 dtucker 1072: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 1073: } else if (strcasecmp(attrib, "address") == 0) {
1.351 dtucker 1074: if (ci == NULL || (ci->test && ci->address == NULL)) {
1.369 dtucker 1075: if (addr_match_list(NULL, arg) != 0)
1076: fatal("Invalid Match address argument "
1077: "'%s' at line %d", arg, line);
1.226 dtucker 1078: result = 0;
1079: continue;
1080: }
1.319 dtucker 1081: if (ci->address == NULL)
1082: match_test_missing_fatal("Address", "addr");
1.226 dtucker 1083: switch (addr_match_list(ci->address, arg)) {
1.181 djm 1084: case 1:
1085: debug("connection from %.100s matched 'Address "
1.226 dtucker 1086: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 1087: break;
1088: case 0:
1.183 djm 1089: case -1:
1.153 dtucker 1090: result = 0;
1.181 djm 1091: break;
1.183 djm 1092: case -2:
1.181 djm 1093: return -1;
1.153 dtucker 1094: }
1.226 dtucker 1095: } else if (strcasecmp(attrib, "localaddress") == 0){
1.351 dtucker 1096: if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1.369 dtucker 1097: if (addr_match_list(NULL, arg) != 0)
1098: fatal("Invalid Match localaddress "
1099: "argument '%s' at line %d", arg,
1100: line);
1.226 dtucker 1101: result = 0;
1102: continue;
1103: }
1.319 dtucker 1104: if (ci->laddress == NULL)
1105: match_test_missing_fatal("LocalAddress",
1106: "laddr");
1.226 dtucker 1107: switch (addr_match_list(ci->laddress, arg)) {
1108: case 1:
1109: debug("connection from %.100s matched "
1110: "'LocalAddress %.100s' at line %d",
1111: ci->laddress, arg, line);
1112: break;
1113: case 0:
1114: case -1:
1115: result = 0;
1116: break;
1117: case -2:
1118: return -1;
1119: }
1120: } else if (strcasecmp(attrib, "localport") == 0) {
1121: if ((port = a2port(arg)) == -1) {
1122: error("Invalid LocalPort '%s' on Match line",
1123: arg);
1124: return -1;
1125: }
1.351 dtucker 1126: if (ci == NULL || (ci->test && ci->lport == -1)) {
1.226 dtucker 1127: result = 0;
1128: continue;
1129: }
1.319 dtucker 1130: if (ci->lport == 0)
1131: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1132: /* TODO support port lists */
1133: if (port == ci->lport)
1134: debug("connection from %.100s matched "
1135: "'LocalPort %d' at line %d",
1136: ci->laddress, port, line);
1137: else
1138: result = 0;
1.317 djm 1139: } else if (strcasecmp(attrib, "rdomain") == 0) {
1.351 dtucker 1140: if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1.317 djm 1141: result = 0;
1142: continue;
1143: }
1.351 dtucker 1144: if (ci->rdomain == NULL)
1145: match_test_missing_fatal("RDomain", "rdomain");
1.317 djm 1146: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1147: result = 0;
1148: else
1149: debug("user %.100s matched 'RDomain %.100s' at "
1150: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1151: } else {
1152: error("Unsupported Match attribute %s", attrib);
1153: return -1;
1154: }
1.243 dtucker 1155: }
1156: if (attributes == 0) {
1157: error("One or more attributes required for Match");
1158: return -1;
1.153 dtucker 1159: }
1.226 dtucker 1160: if (ci != NULL)
1.153 dtucker 1161: debug3("match %sfound", result ? "" : "not ");
1162: *condition = cp;
1163: return result;
1164: }
1165:
1.158 dtucker 1166: #define WHITESPACE " \t\r\n"
1167:
1.220 djm 1168: /* Multistate option parsing */
1169: struct multistate {
1170: char *key;
1171: int value;
1172: };
1.320 djm 1173: static const struct multistate multistate_flag[] = {
1174: { "yes", 1 },
1175: { "no", 0 },
1176: { NULL, -1 }
1177: };
1.363 djm 1178: static const struct multistate multistate_ignore_rhosts[] = {
1179: { "yes", IGNORE_RHOSTS_YES },
1180: { "no", IGNORE_RHOSTS_NO },
1181: { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1182: { NULL, -1 }
1183: };
1.220 djm 1184: static const struct multistate multistate_addressfamily[] = {
1185: { "inet", AF_INET },
1186: { "inet6", AF_INET6 },
1187: { "any", AF_UNSPEC },
1188: { NULL, -1 }
1189: };
1190: static const struct multistate multistate_permitrootlogin[] = {
1191: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1192: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1193: { "forced-commands-only", PERMIT_FORCED_ONLY },
1194: { "yes", PERMIT_YES },
1195: { "no", PERMIT_NO },
1196: { NULL, -1 }
1197: };
1198: static const struct multistate multistate_compression[] = {
1.359 dtucker 1199: #ifdef WITH_ZLIB
1.337 sf 1200: { "yes", COMP_DELAYED },
1201: { "delayed", COMP_DELAYED },
1.359 dtucker 1202: #endif
1.220 djm 1203: { "no", COMP_NONE },
1204: { NULL, -1 }
1205: };
1206: static const struct multistate multistate_gatewayports[] = {
1207: { "clientspecified", 2 },
1208: { "yes", 1 },
1209: { "no", 0 },
1.222 djm 1210: { NULL, -1 }
1211: };
1.233 djm 1212: static const struct multistate multistate_tcpfwd[] = {
1213: { "yes", FORWARD_ALLOW },
1214: { "all", FORWARD_ALLOW },
1215: { "no", FORWARD_DENY },
1216: { "remote", FORWARD_REMOTE },
1217: { "local", FORWARD_LOCAL },
1218: { NULL, -1 }
1219: };
1.220 djm 1220:
1.360 djm 1221: static int
1222: process_server_config_line_depth(ServerOptions *options, char *line,
1.226 dtucker 1223: const char *filename, int linenum, int *activep,
1.365 djm 1224: struct connection_info *connectinfo, int *inc_flags, int depth,
1.360 djm 1225: struct include_list *includes)
1.1 deraadt 1226: {
1.348 dtucker 1227: char ch, *cp, ***chararrayptr, **charptr, *arg, *arg2, *p;
1.360 djm 1228: int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1.174 dtucker 1229: SyslogFacility *log_facility_ptr;
1230: LogLevel *log_level_ptr;
1.25 markus 1231: ServerOpCodes opcode;
1.329 djm 1232: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1233: size_t len;
1.237 dtucker 1234: long long val64;
1.220 djm 1235: const struct multistate *multistate_ptr;
1.322 dtucker 1236: const char *errstr;
1.360 djm 1237: struct include_item *item;
1238: glob_t gbuf;
1.303 djm 1239:
1240: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1241: if ((len = strlen(line)) == 0)
1242: return 0;
1243: for (len--; len > 0; len--) {
1244: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1245: break;
1246: line[len] = '\0';
1247: }
1.25 markus 1248:
1.94 markus 1249: cp = line;
1.148 dtucker 1250: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1251: return 0;
1.94 markus 1252: /* Ignore leading whitespace */
1253: if (*arg == '\0')
1254: arg = strdelim(&cp);
1255: if (!arg || !*arg || *arg == '#')
1256: return 0;
1257: intptr = NULL;
1258: charptr = NULL;
1.153 dtucker 1259: opcode = parse_token(arg, filename, linenum, &flags);
1260:
1261: if (activep == NULL) { /* We are processing a command line directive */
1262: cmdline = 1;
1263: activep = &cmdline;
1264: }
1.360 djm 1265: if (*activep && opcode != sMatch && opcode != sInclude)
1.153 dtucker 1266: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1267: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1268: if (connectinfo == NULL) {
1.153 dtucker 1269: fatal("%s line %d: Directive '%s' is not allowed "
1270: "within a Match block", filename, linenum, arg);
1271: } else { /* this is a directive we have already processed */
1272: while (arg)
1273: arg = strdelim(&cp);
1274: return 0;
1275: }
1276: }
1277:
1.94 markus 1278: switch (opcode) {
1279: case sBadOption:
1280: return -1;
1281: case sPort:
1282: /* ignore ports from configfile if cmdline specifies ports */
1283: if (options->ports_from_cmdline)
1284: return 0;
1285: if (options->num_ports >= MAX_PORTS)
1286: fatal("%s line %d: too many ports.",
1287: filename, linenum);
1.48 provos 1288: arg = strdelim(&cp);
1.94 markus 1289: if (!arg || *arg == '\0')
1290: fatal("%s line %d: missing port number.",
1291: filename, linenum);
1292: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1293: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1294: fatal("%s line %d: Badly formatted port number.",
1295: filename, linenum);
1296: break;
1.29 markus 1297:
1.94 markus 1298: case sLoginGraceTime:
1299: intptr = &options->login_grace_time;
1.180 djm 1300: parse_time:
1.94 markus 1301: arg = strdelim(&cp);
1302: if (!arg || *arg == '\0')
1303: fatal("%s line %d: missing time value.",
1304: filename, linenum);
1305: if ((value = convtime(arg)) == -1)
1306: fatal("%s line %d: invalid time value.",
1307: filename, linenum);
1.268 djm 1308: if (*activep && *intptr == -1)
1.94 markus 1309: *intptr = value;
1310: break;
1311:
1312: case sListenAddress:
1313: arg = strdelim(&cp);
1.139 djm 1314: if (arg == NULL || *arg == '\0')
1315: fatal("%s line %d: missing address",
1.94 markus 1316: filename, linenum);
1.144 dtucker 1317: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1318: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1319: && strchr(p+1, ':') != NULL) {
1.315 djm 1320: port = 0;
1321: p = arg;
1322: } else {
1.347 dtucker 1323: arg2 = NULL;
1.348 dtucker 1324: ch = '\0';
1.347 dtucker 1325: p = hpdelim2(&arg, &ch);
1326: if (p == NULL || ch == '/')
1.315 djm 1327: fatal("%s line %d: bad address:port usage",
1328: filename, linenum);
1329: p = cleanhostname(p);
1330: if (arg == NULL)
1331: port = 0;
1332: else if ((port = a2port(arg)) <= 0)
1333: fatal("%s line %d: bad port number",
1334: filename, linenum);
1335: }
1336: /* Optional routing table */
1337: arg2 = NULL;
1338: if ((arg = strdelim(&cp)) != NULL) {
1339: if (strcmp(arg, "rdomain") != 0 ||
1340: (arg2 = strdelim(&cp)) == NULL)
1341: fatal("%s line %d: bad ListenAddress syntax",
1342: filename, linenum);
1343: if (!valid_rdomain(arg2))
1344: fatal("%s line %d: bad routing domain",
1345: filename, linenum);
1.144 dtucker 1346: }
1.139 djm 1347:
1.315 djm 1348: queue_listen_addr(options, p, arg2, port);
1.25 markus 1349:
1.138 djm 1350: break;
1351:
1352: case sAddressFamily:
1.220 djm 1353: intptr = &options->address_family;
1354: multistate_ptr = multistate_addressfamily;
1355: parse_multistate:
1.138 djm 1356: arg = strdelim(&cp);
1.141 markus 1357: if (!arg || *arg == '\0')
1.220 djm 1358: fatal("%s line %d: missing argument.",
1.141 markus 1359: filename, linenum);
1.220 djm 1360: value = -1;
1361: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1362: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1363: value = multistate_ptr[i].value;
1364: break;
1365: }
1366: }
1367: if (value == -1)
1368: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1369: filename, linenum, arg);
1.220 djm 1370: if (*activep && *intptr == -1)
1.138 djm 1371: *intptr = value;
1.94 markus 1372: break;
1373:
1374: case sHostKeyFile:
1375: arg = strdelim(&cp);
1376: if (!arg || *arg == '\0')
1377: fatal("%s line %d: missing file name.",
1378: filename, linenum);
1.344 djm 1379: if (*activep) {
1380: servconf_add_hostkey(filename, linenum,
1381: options, arg, 1);
1382: }
1.94 markus 1383: break;
1.76 stevesk 1384:
1.240 markus 1385: case sHostKeyAgent:
1386: charptr = &options->host_key_agent;
1387: arg = strdelim(&cp);
1388: if (!arg || *arg == '\0')
1389: fatal("%s line %d: missing socket name.",
1390: filename, linenum);
1391: if (*activep && *charptr == NULL)
1392: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1393: xstrdup(arg) : derelativise_path(arg);
1394: break;
1395:
1.203 djm 1396: case sHostCertificate:
1.314 djm 1397: arg = strdelim(&cp);
1398: if (!arg || *arg == '\0')
1399: fatal("%s line %d: missing file name.",
1400: filename, linenum);
1401: if (*activep)
1402: servconf_add_hostcert(filename, linenum, options, arg);
1403: break;
1.203 djm 1404:
1.94 markus 1405: case sPidFile:
1406: charptr = &options->pid_file;
1.314 djm 1407: parse_filename:
1408: arg = strdelim(&cp);
1409: if (!arg || *arg == '\0')
1410: fatal("%s line %d: missing file name.",
1411: filename, linenum);
1412: if (*activep && *charptr == NULL) {
1413: *charptr = derelativise_path(arg);
1414: /* increase optional counter */
1415: if (intptr != NULL)
1416: *intptr = *intptr + 1;
1417: }
1418: break;
1.25 markus 1419:
1.94 markus 1420: case sPermitRootLogin:
1421: intptr = &options->permit_root_login;
1.220 djm 1422: multistate_ptr = multistate_permitrootlogin;
1423: goto parse_multistate;
1.36 markus 1424:
1.94 markus 1425: case sIgnoreRhosts:
1426: intptr = &options->ignore_rhosts;
1.363 djm 1427: multistate_ptr = multistate_ignore_rhosts;
1.320 djm 1428: goto parse_multistate;
1.94 markus 1429:
1430: case sIgnoreUserKnownHosts:
1431: intptr = &options->ignore_user_known_hosts;
1.363 djm 1432: parse_flag:
1433: multistate_ptr = multistate_flag;
1434: goto parse_multistate;
1.94 markus 1435:
1436: case sHostbasedAuthentication:
1437: intptr = &options->hostbased_authentication;
1438: goto parse_flag;
1439:
1440: case sHostbasedUsesNameFromPacketOnly:
1441: intptr = &options->hostbased_uses_name_from_packet_only;
1442: goto parse_flag;
1443:
1.258 djm 1444: case sHostbasedAcceptedKeyTypes:
1445: charptr = &options->hostbased_key_types;
1446: parse_keytypes:
1447: arg = strdelim(&cp);
1448: if (!arg || *arg == '\0')
1449: fatal("%s line %d: Missing argument.",
1450: filename, linenum);
1.304 djm 1451: if (*arg != '-' &&
1.352 naddy 1452: !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1453: arg + 1 : arg, 1))
1.258 djm 1454: fatal("%s line %d: Bad key types '%s'.",
1455: filename, linenum, arg ? arg : "<NONE>");
1456: if (*activep && *charptr == NULL)
1457: *charptr = xstrdup(arg);
1458: break;
1459:
1.276 markus 1460: case sHostKeyAlgorithms:
1461: charptr = &options->hostkeyalgorithms;
1462: goto parse_keytypes;
1463:
1.341 djm 1464: case sCASignatureAlgorithms:
1465: charptr = &options->ca_sign_algorithms;
1466: goto parse_keytypes;
1467:
1.94 markus 1468: case sPubkeyAuthentication:
1469: intptr = &options->pubkey_authentication;
1470: goto parse_flag;
1.119 jakob 1471:
1.258 djm 1472: case sPubkeyAcceptedKeyTypes:
1473: charptr = &options->pubkey_key_types;
1474: goto parse_keytypes;
1475:
1.354 djm 1476: case sPubkeyAuthOptions:
1477: intptr = &options->pubkey_auth_options;
1478: value = 0;
1479: while ((arg = strdelim(&cp)) && *arg != '\0') {
1480: if (strcasecmp(arg, "none") == 0)
1481: continue;
1482: if (strcasecmp(arg, "touch-required") == 0)
1483: value |= PUBKEYAUTH_TOUCH_REQUIRED;
1.368 djm 1484: else if (strcasecmp(arg, "verify-required") == 0)
1485: value |= PUBKEYAUTH_VERIFY_REQUIRED;
1.354 djm 1486: else {
1487: fatal("%s line %d: unsupported "
1488: "PubkeyAuthOptions option %s",
1489: filename, linenum, arg);
1490: }
1491: }
1492: if (*activep && *intptr == -1)
1493: *intptr = value;
1494: break;
1495:
1.94 markus 1496: case sKerberosAuthentication:
1497: intptr = &options->kerberos_authentication;
1498: goto parse_flag;
1499:
1500: case sKerberosOrLocalPasswd:
1501: intptr = &options->kerberos_or_local_passwd;
1502: goto parse_flag;
1503:
1504: case sKerberosTicketCleanup:
1505: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1506: goto parse_flag;
1507:
1508: case sKerberosGetAFSToken:
1509: intptr = &options->kerberos_get_afs_token;
1.125 markus 1510: goto parse_flag;
1511:
1512: case sGssAuthentication:
1513: intptr = &options->gss_authentication;
1514: goto parse_flag;
1515:
1516: case sGssCleanupCreds:
1517: intptr = &options->gss_cleanup_creds;
1.271 djm 1518: goto parse_flag;
1519:
1520: case sGssStrictAcceptor:
1521: intptr = &options->gss_strict_acceptor;
1.94 markus 1522: goto parse_flag;
1523:
1524: case sPasswordAuthentication:
1525: intptr = &options->password_authentication;
1526: goto parse_flag;
1527:
1528: case sKbdInteractiveAuthentication:
1529: intptr = &options->kbd_interactive_authentication;
1530: goto parse_flag;
1531:
1532: case sChallengeResponseAuthentication:
1533: intptr = &options->challenge_response_authentication;
1534: goto parse_flag;
1535:
1536: case sPrintMotd:
1537: intptr = &options->print_motd;
1538: goto parse_flag;
1539:
1540: case sPrintLastLog:
1541: intptr = &options->print_lastlog;
1542: goto parse_flag;
1543:
1544: case sX11Forwarding:
1545: intptr = &options->x11_forwarding;
1546: goto parse_flag;
1547:
1548: case sX11DisplayOffset:
1549: intptr = &options->x11_display_offset;
1.293 naddy 1550: parse_int:
1551: arg = strdelim(&cp);
1.322 dtucker 1552: if ((errstr = atoi_err(arg, &value)) != NULL)
1553: fatal("%s line %d: integer value %s.",
1554: filename, linenum, errstr);
1.293 naddy 1555: if (*activep && *intptr == -1)
1556: *intptr = value;
1557: break;
1.99 stevesk 1558:
1559: case sX11UseLocalhost:
1560: intptr = &options->x11_use_localhost;
1561: goto parse_flag;
1.94 markus 1562:
1563: case sXAuthLocation:
1564: charptr = &options->xauth_location;
1565: goto parse_filename;
1566:
1.244 djm 1567: case sPermitTTY:
1568: intptr = &options->permit_tty;
1569: goto parse_flag;
1570:
1.250 djm 1571: case sPermitUserRC:
1572: intptr = &options->permit_user_rc;
1573: goto parse_flag;
1574:
1.94 markus 1575: case sStrictModes:
1576: intptr = &options->strict_modes;
1577: goto parse_flag;
1578:
1.129 markus 1579: case sTCPKeepAlive:
1580: intptr = &options->tcp_keep_alive;
1.94 markus 1581: goto parse_flag;
1582:
1583: case sEmptyPasswd:
1584: intptr = &options->permit_empty_passwd;
1.113 markus 1585: goto parse_flag;
1586:
1587: case sPermitUserEnvironment:
1588: intptr = &options->permit_user_env;
1.367 djm 1589: charptr = &options->permit_user_env_allowlist;
1.334 djm 1590: arg = strdelim(&cp);
1591: if (!arg || *arg == '\0')
1592: fatal("%s line %d: missing argument.",
1593: filename, linenum);
1594: value = 0;
1595: p = NULL;
1596: if (strcmp(arg, "yes") == 0)
1597: value = 1;
1598: else if (strcmp(arg, "no") == 0)
1599: value = 0;
1600: else {
1601: /* Pattern-list specified */
1602: value = 1;
1603: p = xstrdup(arg);
1604: }
1605: if (*activep && *intptr == -1) {
1606: *intptr = value;
1607: *charptr = p;
1608: p = NULL;
1609: }
1610: free(p);
1611: break;
1.94 markus 1612:
1.111 markus 1613: case sCompression:
1614: intptr = &options->compression;
1.220 djm 1615: multistate_ptr = multistate_compression;
1616: goto parse_multistate;
1.94 markus 1617:
1.235 dtucker 1618: case sRekeyLimit:
1619: arg = strdelim(&cp);
1620: if (!arg || *arg == '\0')
1621: fatal("%.200s line %d: Missing argument.", filename,
1622: linenum);
1623: if (strcmp(arg, "default") == 0) {
1624: val64 = 0;
1625: } else {
1.236 dtucker 1626: if (scan_scaled(arg, &val64) == -1)
1627: fatal("%.200s line %d: Bad number '%s': %s",
1628: filename, linenum, arg, strerror(errno));
1.235 dtucker 1629: if (val64 != 0 && val64 < 16)
1630: fatal("%.200s line %d: RekeyLimit too small",
1631: filename, linenum);
1632: }
1633: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1634: options->rekey_limit = val64;
1.235 dtucker 1635: if (cp != NULL) { /* optional rekey interval present */
1636: if (strcmp(cp, "none") == 0) {
1637: (void)strdelim(&cp); /* discard */
1638: break;
1639: }
1640: intptr = &options->rekey_interval;
1641: goto parse_time;
1642: }
1643: break;
1644:
1.94 markus 1645: case sGatewayPorts:
1.251 millert 1646: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1647: multistate_ptr = multistate_gatewayports;
1648: goto parse_multistate;
1.25 markus 1649:
1.122 markus 1650: case sUseDNS:
1651: intptr = &options->use_dns;
1.94 markus 1652: goto parse_flag;
1.53 markus 1653:
1.94 markus 1654: case sLogFacility:
1.174 dtucker 1655: log_facility_ptr = &options->log_facility;
1.94 markus 1656: arg = strdelim(&cp);
1657: value = log_facility_number(arg);
1.101 markus 1658: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1659: fatal("%.200s line %d: unsupported log facility '%s'",
1660: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1661: if (*log_facility_ptr == -1)
1662: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1663: break;
1.25 markus 1664:
1.94 markus 1665: case sLogLevel:
1.174 dtucker 1666: log_level_ptr = &options->log_level;
1.94 markus 1667: arg = strdelim(&cp);
1668: value = log_level_number(arg);
1.101 markus 1669: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1670: fatal("%.200s line %d: unsupported log level '%s'",
1671: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1672: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1673: *log_level_ptr = (LogLevel) value;
1.94 markus 1674: break;
1675:
1.370 djm 1676: case sLogVerbose:
1677: while ((arg = strdelim(&cp)) && *arg != '\0') {
1678: if (!*activep)
1679: continue;
1680: array_append(filename, linenum, "oLogVerbose",
1681: &options->log_verbose, &options->num_log_verbose,
1682: arg);
1683: }
1684: break;
1685:
1.94 markus 1686: case sAllowTcpForwarding:
1687: intptr = &options->allow_tcp_forwarding;
1.233 djm 1688: multistate_ptr = multistate_tcpfwd;
1689: goto parse_multistate;
1.102 provos 1690:
1.251 millert 1691: case sAllowStreamLocalForwarding:
1692: intptr = &options->allow_streamlocal_forwarding;
1693: multistate_ptr = multistate_tcpfwd;
1694: goto parse_multistate;
1695:
1.178 pyr 1696: case sAllowAgentForwarding:
1697: intptr = &options->allow_agent_forwarding;
1698: goto parse_flag;
1699:
1.301 djm 1700: case sDisableForwarding:
1701: intptr = &options->disable_forwarding;
1702: goto parse_flag;
1703:
1.94 markus 1704: case sAllowUsers:
1705: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1706: if (match_user(NULL, NULL, NULL, arg) == -1)
1707: fatal("%s line %d: invalid AllowUsers pattern: "
1708: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1709: if (!*activep)
1710: continue;
1.314 djm 1711: array_append(filename, linenum, "AllowUsers",
1712: &options->allow_users, &options->num_allow_users,
1713: arg);
1.94 markus 1714: }
1715: break;
1.25 markus 1716:
1.94 markus 1717: case sDenyUsers:
1718: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1719: if (match_user(NULL, NULL, NULL, arg) == -1)
1720: fatal("%s line %d: invalid DenyUsers pattern: "
1721: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1722: if (!*activep)
1723: continue;
1.314 djm 1724: array_append(filename, linenum, "DenyUsers",
1725: &options->deny_users, &options->num_deny_users,
1726: arg);
1.94 markus 1727: }
1728: break;
1.25 markus 1729:
1.94 markus 1730: case sAllowGroups:
1731: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1732: if (!*activep)
1733: continue;
1.314 djm 1734: array_append(filename, linenum, "AllowGroups",
1735: &options->allow_groups, &options->num_allow_groups,
1736: arg);
1.94 markus 1737: }
1738: break;
1.33 markus 1739:
1.94 markus 1740: case sDenyGroups:
1741: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1742: if (!*activep)
1743: continue;
1.314 djm 1744: array_append(filename, linenum, "DenyGroups",
1745: &options->deny_groups, &options->num_deny_groups,
1746: arg);
1.94 markus 1747: }
1748: break;
1.66 markus 1749:
1.94 markus 1750: case sCiphers:
1751: arg = strdelim(&cp);
1752: if (!arg || *arg == '\0')
1753: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1754: if (*arg != '-' &&
1755: !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1756: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1757: filename, linenum, arg ? arg : "<NONE>");
1758: if (options->ciphers == NULL)
1759: options->ciphers = xstrdup(arg);
1760: break;
1.33 markus 1761:
1.94 markus 1762: case sMacs:
1763: arg = strdelim(&cp);
1764: if (!arg || *arg == '\0')
1765: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1766: if (*arg != '-' &&
1767: !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1768: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1769: filename, linenum, arg ? arg : "<NONE>");
1770: if (options->macs == NULL)
1771: options->macs = xstrdup(arg);
1.211 djm 1772: break;
1773:
1774: case sKexAlgorithms:
1775: arg = strdelim(&cp);
1776: if (!arg || *arg == '\0')
1777: fatal("%s line %d: Missing argument.",
1778: filename, linenum);
1.304 djm 1779: if (*arg != '-' &&
1.352 naddy 1780: !kex_names_valid(*arg == '+' || *arg == '^' ?
1781: arg + 1 : arg))
1.211 djm 1782: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1783: filename, linenum, arg ? arg : "<NONE>");
1784: if (options->kex_algorithms == NULL)
1785: options->kex_algorithms = xstrdup(arg);
1.94 markus 1786: break;
1.43 jakob 1787:
1.94 markus 1788: case sSubsystem:
1789: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1790: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1791: filename, linenum);
1.94 markus 1792: }
1793: arg = strdelim(&cp);
1794: if (!arg || *arg == '\0')
1795: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1796: filename, linenum);
1.153 dtucker 1797: if (!*activep) {
1798: arg = strdelim(&cp);
1799: break;
1800: }
1.94 markus 1801: for (i = 0; i < options->num_subsystems; i++)
1802: if (strcmp(arg, options->subsystem_name[i]) == 0)
1803: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1804: filename, linenum, arg);
1.94 markus 1805: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1806: arg = strdelim(&cp);
1807: if (!arg || *arg == '\0')
1808: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1809: filename, linenum);
1.94 markus 1810: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1811:
1812: /* Collect arguments (separate to executable) */
1813: p = xstrdup(arg);
1814: len = strlen(p) + 1;
1815: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1816: len += 1 + strlen(arg);
1.264 deraadt 1817: p = xreallocarray(p, 1, len);
1.151 djm 1818: strlcat(p, " ", len);
1819: strlcat(p, arg, len);
1820: }
1821: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1822: options->num_subsystems++;
1823: break;
1.46 markus 1824:
1.94 markus 1825: case sMaxStartups:
1826: arg = strdelim(&cp);
1827: if (!arg || *arg == '\0')
1828: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1829: filename, linenum);
1.94 markus 1830: if ((n = sscanf(arg, "%d:%d:%d",
1831: &options->max_startups_begin,
1832: &options->max_startups_rate,
1833: &options->max_startups)) == 3) {
1834: if (options->max_startups_begin >
1835: options->max_startups ||
1836: options->max_startups_rate > 100 ||
1837: options->max_startups_rate < 1)
1.50 markus 1838: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1839: filename, linenum);
1.94 markus 1840: } else if (n != 1)
1841: fatal("%s line %d: Illegal MaxStartups spec.",
1842: filename, linenum);
1843: else
1844: options->max_startups = options->max_startups_begin;
1845: break;
1.133 dtucker 1846:
1.372 dtucker 1847: case sPerSourceNetBlockSize:
1848: arg = strdelim(&cp);
1849: if (!arg || *arg == '\0')
1850: fatal("%s line %d: Missing PerSourceNetBlockSize spec.",
1851: filename, linenum);
1852: switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
1853: case 2:
1854: if (value2 < 0 || value2 > 128)
1855: n = -1;
1856: /* FALLTHROUGH */
1857: case 1:
1858: if (value < 0 || value > 32)
1859: n = -1;
1860: }
1861: if (n != 1 && n != 2)
1862: fatal("%s line %d: Invalid PerSourceNetBlockSize"
1863: " spec.", filename, linenum);
1864: if (*activep) {
1865: options->per_source_masklen_ipv4 = value;
1866: options->per_source_masklen_ipv6 = value2;
1867: }
1868: break;
1869:
1870: case sPerSourceMaxStartups:
1871: arg = strdelim(&cp);
1872: if (!arg || *arg == '\0')
1873: fatal("%s line %d: Missing PerSourceMaxStartups spec.",
1874: filename, linenum);
1875: if (strcmp(arg, "none") == 0) { /* no limit */
1876: value = INT_MAX;
1877: } else {
1878: if ((errstr = atoi_err(arg, &value)) != NULL)
1879: fatal("%s line %d: integer value %s.",
1880: filename, linenum, errstr);
1881: }
1882: if (*activep)
1883: options->per_source_max_startups = value;
1884: break;
1885:
1.133 dtucker 1886: case sMaxAuthTries:
1887: intptr = &options->max_authtries;
1888: goto parse_int;
1.94 markus 1889:
1.180 djm 1890: case sMaxSessions:
1891: intptr = &options->max_sessions;
1892: goto parse_int;
1893:
1.94 markus 1894: case sBanner:
1895: charptr = &options->banner;
1896: goto parse_filename;
1.176 djm 1897:
1.94 markus 1898: /*
1899: * These options can contain %X options expanded at
1900: * connect time, so that you can specify paths like:
1901: *
1902: * AuthorizedKeysFile /etc/ssh_keys/%u
1903: */
1904: case sAuthorizedKeysFile:
1.219 djm 1905: if (*activep && options->num_authkeys_files == 0) {
1906: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1907: arg = tilde_expand_filename(arg, getuid());
1908: array_append(filename, linenum,
1909: "AuthorizedKeysFile",
1910: &options->authorized_keys_files,
1911: &options->num_authkeys_files, arg);
1912: free(arg);
1.219 djm 1913: }
1914: }
1915: return 0;
1916:
1.208 djm 1917: case sAuthorizedPrincipalsFile:
1918: charptr = &options->authorized_principals_file;
1.205 djm 1919: arg = strdelim(&cp);
1920: if (!arg || *arg == '\0')
1921: fatal("%s line %d: missing file name.",
1922: filename, linenum);
1923: if (*activep && *charptr == NULL) {
1.206 markus 1924: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1925: /* increase optional counter */
1926: if (intptr != NULL)
1927: *intptr = *intptr + 1;
1928: }
1929: break;
1.94 markus 1930:
1931: case sClientAliveInterval:
1932: intptr = &options->client_alive_interval;
1933: goto parse_time;
1934:
1935: case sClientAliveCountMax:
1936: intptr = &options->client_alive_count_max;
1937: goto parse_int;
1.131 djm 1938:
1939: case sAcceptEnv:
1940: while ((arg = strdelim(&cp)) && *arg != '\0') {
1941: if (strchr(arg, '=') != NULL)
1942: fatal("%s line %d: Invalid environment name.",
1943: filename, linenum);
1.153 dtucker 1944: if (!*activep)
1.227 markus 1945: continue;
1.314 djm 1946: array_append(filename, linenum, "AcceptEnv",
1947: &options->accept_env, &options->num_accept_env,
1948: arg);
1.131 djm 1949: }
1950: break;
1.145 reyk 1951:
1.332 djm 1952: case sSetEnv:
1953: uvalue = options->num_setenv;
1954: while ((arg = strdelimw(&cp)) && *arg != '\0') {
1955: if (strchr(arg, '=') == NULL)
1956: fatal("%s line %d: Invalid environment.",
1957: filename, linenum);
1958: if (!*activep || uvalue != 0)
1959: continue;
1960: array_append(filename, linenum, "SetEnv",
1961: &options->setenv, &options->num_setenv, arg);
1962: }
1963: break;
1964:
1.145 reyk 1965: case sPermitTunnel:
1966: intptr = &options->permit_tun;
1.146 reyk 1967: arg = strdelim(&cp);
1968: if (!arg || *arg == '\0')
1969: fatal("%s line %d: Missing yes/point-to-point/"
1970: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1971: value = -1;
1972: for (i = 0; tunmode_desc[i].val != -1; i++)
1973: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1974: value = tunmode_desc[i].val;
1975: break;
1976: }
1977: if (value == -1)
1.146 reyk 1978: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1979: "no argument: %s", filename, linenum, arg);
1.268 djm 1980: if (*activep && *intptr == -1)
1.146 reyk 1981: *intptr = value;
1982: break;
1.94 markus 1983:
1.360 djm 1984: case sInclude:
1985: if (cmdline) {
1986: fatal("Include directive not supported as a "
1987: "command-line option");
1988: }
1989: value = 0;
1990: while ((arg2 = strdelim(&cp)) != NULL && *arg2 != '\0') {
1991: value++;
1992: found = 0;
1993: if (*arg2 != '/' && *arg2 != '~') {
1.361 markus 1994: xasprintf(&arg, "%s/%s", SSHDIR, arg2);
1.360 djm 1995: } else
1996: arg = xstrdup(arg2);
1997:
1998: /*
1999: * Don't let included files clobber the containing
2000: * file's Match state.
2001: */
2002: oactive = *activep;
2003:
2004: /* consult cache of include files */
2005: TAILQ_FOREACH(item, includes, entry) {
2006: if (strcmp(item->selector, arg) != 0)
2007: continue;
2008: if (item->filename != NULL) {
2009: parse_server_config_depth(options,
2010: item->filename, item->contents,
2011: includes, connectinfo,
1.365 djm 2012: (*inc_flags & SSHCFG_MATCH_ONLY
2013: ? SSHCFG_MATCH_ONLY : (oactive
2014: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2015: activep, depth + 1);
2016: }
2017: found = 1;
2018: *activep = oactive;
2019: }
2020: if (found != 0) {
2021: free(arg);
2022: continue;
2023: }
2024:
2025: /* requested glob was not in cache */
2026: debug2("%s line %d: new include %s",
2027: filename, linenum, arg);
2028: if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
2029: if (r != GLOB_NOMATCH) {
2030: fatal("%s line %d: include \"%s\" "
2031: "glob failed", filename,
2032: linenum, arg);
2033: }
2034: /*
2035: * If no entry matched then record a
2036: * placeholder to skip later glob calls.
2037: */
2038: debug2("%s line %d: no match for %s",
2039: filename, linenum, arg);
2040: item = xcalloc(1, sizeof(*item));
2041: item->selector = strdup(arg);
2042: TAILQ_INSERT_TAIL(includes,
2043: item, entry);
2044: }
2045: if (gbuf.gl_pathc > INT_MAX)
1.371 djm 2046: fatal_f("too many glob results");
1.360 djm 2047: for (n = 0; n < (int)gbuf.gl_pathc; n++) {
2048: debug2("%s line %d: including %s",
2049: filename, linenum, gbuf.gl_pathv[n]);
2050: item = xcalloc(1, sizeof(*item));
2051: item->selector = strdup(arg);
2052: item->filename = strdup(gbuf.gl_pathv[n]);
1.371 djm 2053: if ((item->contents = sshbuf_new()) == NULL)
2054: fatal_f("sshbuf_new failed");
1.360 djm 2055: load_server_config(item->filename,
2056: item->contents);
2057: parse_server_config_depth(options,
2058: item->filename, item->contents,
2059: includes, connectinfo,
1.365 djm 2060: (*inc_flags & SSHCFG_MATCH_ONLY
2061: ? SSHCFG_MATCH_ONLY : (oactive
2062: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2063: activep, depth + 1);
2064: *activep = oactive;
2065: TAILQ_INSERT_TAIL(includes, item, entry);
2066: }
2067: globfree(&gbuf);
2068: free(arg);
2069: }
2070: if (value == 0) {
2071: fatal("%s line %d: Include missing filename argument",
2072: filename, linenum);
2073: }
2074: break;
2075:
1.153 dtucker 2076: case sMatch:
2077: if (cmdline)
2078: fatal("Match directive not supported as a command-line "
2079: "option");
1.365 djm 2080: value = match_cfg_line(&cp, linenum,
2081: (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
1.153 dtucker 2082: if (value < 0)
2083: fatal("%s line %d: Bad Match condition", filename,
2084: linenum);
1.365 djm 2085: *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
2086: /* The MATCH_ONLY is applicable only until the first match block */
2087: *inc_flags &= ~SSHCFG_MATCH_ONLY;
1.156 dtucker 2088: break;
2089:
1.330 djm 2090: case sPermitListen:
1.156 dtucker 2091: case sPermitOpen:
1.330 djm 2092: if (opcode == sPermitListen) {
2093: uintptr = &options->num_permitted_listens;
2094: chararrayptr = &options->permitted_listens;
1.329 djm 2095: } else {
2096: uintptr = &options->num_permitted_opens;
2097: chararrayptr = &options->permitted_opens;
2098: }
1.156 dtucker 2099: arg = strdelim(&cp);
2100: if (!arg || *arg == '\0')
1.329 djm 2101: fatal("%s line %d: missing %s specification",
2102: filename, linenum, lookup_opcode_name(opcode));
2103: uvalue = *uintptr; /* modified later */
1.310 djm 2104: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 djm 2105: if (*activep && uvalue == 0) {
2106: *uintptr = 1;
2107: *chararrayptr = xcalloc(1,
2108: sizeof(**chararrayptr));
2109: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 2110: }
1.156 dtucker 2111: break;
2112: }
1.159 dtucker 2113: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.333 djm 2114: if (opcode == sPermitListen &&
2115: strchr(arg, ':') == NULL) {
2116: /*
2117: * Allow bare port number for PermitListen
2118: * to indicate a wildcard listen host.
2119: */
2120: xasprintf(&arg2, "*:%s", arg);
2121: } else {
2122: arg2 = xstrdup(arg);
1.348 dtucker 2123: ch = '\0';
1.347 dtucker 2124: p = hpdelim2(&arg, &ch);
2125: if (p == NULL || ch == '/') {
1.333 djm 2126: fatal("%s line %d: missing host in %s",
2127: filename, linenum,
2128: lookup_opcode_name(opcode));
2129: }
2130: p = cleanhostname(p);
1.329 djm 2131: }
2132: if (arg == NULL ||
2133: ((port = permitopen_port(arg)) < 0)) {
2134: fatal("%s line %d: bad port number in %s",
2135: filename, linenum,
2136: lookup_opcode_name(opcode));
2137: }
2138: if (*activep && uvalue == 0) {
1.314 djm 2139: array_append(filename, linenum,
1.329 djm 2140: lookup_opcode_name(opcode),
2141: chararrayptr, uintptr, arg2);
1.314 djm 2142: }
2143: free(arg2);
1.159 dtucker 2144: }
1.153 dtucker 2145: break;
2146:
1.158 dtucker 2147: case sForceCommand:
1.262 dtucker 2148: if (cp == NULL || *cp == '\0')
1.158 dtucker 2149: fatal("%.200s line %d: Missing argument.", filename,
2150: linenum);
2151: len = strspn(cp, WHITESPACE);
2152: if (*activep && options->adm_forced_command == NULL)
2153: options->adm_forced_command = xstrdup(cp + len);
2154: return 0;
2155:
1.176 djm 2156: case sChrootDirectory:
2157: charptr = &options->chroot_directory;
1.177 djm 2158:
2159: arg = strdelim(&cp);
2160: if (!arg || *arg == '\0')
2161: fatal("%s line %d: missing file name.",
2162: filename, linenum);
2163: if (*activep && *charptr == NULL)
2164: *charptr = xstrdup(arg);
2165: break;
1.176 djm 2166:
1.204 djm 2167: case sTrustedUserCAKeys:
2168: charptr = &options->trusted_user_ca_keys;
2169: goto parse_filename;
2170:
2171: case sRevokedKeys:
2172: charptr = &options->revoked_keys_file;
2173: goto parse_filename;
2174:
1.355 djm 2175: case sSecurityKeyProvider:
2176: charptr = &options->sk_provider;
1.356 djm 2177: arg = strdelim(&cp);
2178: if (!arg || *arg == '\0')
2179: fatal("%s line %d: missing file name.",
2180: filename, linenum);
2181: if (*activep && *charptr == NULL) {
2182: *charptr = strcasecmp(arg, "internal") == 0 ?
2183: xstrdup(arg) : derelativise_path(arg);
2184: /* increase optional counter */
2185: if (intptr != NULL)
2186: *intptr = *intptr + 1;
2187: }
2188: break;
1.355 djm 2189:
1.213 djm 2190: case sIPQoS:
2191: arg = strdelim(&cp);
2192: if ((value = parse_ipqos(arg)) == -1)
2193: fatal("%s line %d: Bad IPQoS value: %s",
2194: filename, linenum, arg);
2195: arg = strdelim(&cp);
2196: if (arg == NULL)
2197: value2 = value;
2198: else if ((value2 = parse_ipqos(arg)) == -1)
2199: fatal("%s line %d: Bad IPQoS value: %s",
2200: filename, linenum, arg);
2201: if (*activep) {
2202: options->ip_qos_interactive = value;
2203: options->ip_qos_bulk = value2;
2204: }
2205: break;
2206:
1.225 djm 2207: case sVersionAddendum:
1.262 dtucker 2208: if (cp == NULL || *cp == '\0')
1.225 djm 2209: fatal("%.200s line %d: Missing argument.", filename,
2210: linenum);
2211: len = strspn(cp, WHITESPACE);
2212: if (*activep && options->version_addendum == NULL) {
2213: if (strcasecmp(cp + len, "none") == 0)
2214: options->version_addendum = xstrdup("");
2215: else if (strchr(cp + len, '\r') != NULL)
2216: fatal("%.200s line %d: Invalid argument",
2217: filename, linenum);
2218: else
2219: options->version_addendum = xstrdup(cp + len);
2220: }
2221: return 0;
2222:
1.231 djm 2223: case sAuthorizedKeysCommand:
1.255 jsg 2224: if (cp == NULL)
2225: fatal("%.200s line %d: Missing argument.", filename,
2226: linenum);
1.231 djm 2227: len = strspn(cp, WHITESPACE);
2228: if (*activep && options->authorized_keys_command == NULL) {
2229: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2230: fatal("%.200s line %d: AuthorizedKeysCommand "
2231: "must be an absolute path",
2232: filename, linenum);
2233: options->authorized_keys_command = xstrdup(cp + len);
2234: }
2235: return 0;
2236:
2237: case sAuthorizedKeysCommandUser:
2238: charptr = &options->authorized_keys_command_user;
2239:
2240: arg = strdelim(&cp);
1.255 jsg 2241: if (!arg || *arg == '\0')
2242: fatal("%s line %d: missing AuthorizedKeysCommandUser "
2243: "argument.", filename, linenum);
1.231 djm 2244: if (*activep && *charptr == NULL)
2245: *charptr = xstrdup(arg);
2246: break;
2247:
1.270 djm 2248: case sAuthorizedPrincipalsCommand:
2249: if (cp == NULL)
2250: fatal("%.200s line %d: Missing argument.", filename,
2251: linenum);
2252: len = strspn(cp, WHITESPACE);
2253: if (*activep &&
2254: options->authorized_principals_command == NULL) {
2255: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2256: fatal("%.200s line %d: "
2257: "AuthorizedPrincipalsCommand must be "
2258: "an absolute path", filename, linenum);
2259: options->authorized_principals_command =
2260: xstrdup(cp + len);
2261: }
2262: return 0;
2263:
2264: case sAuthorizedPrincipalsCommandUser:
2265: charptr = &options->authorized_principals_command_user;
2266:
2267: arg = strdelim(&cp);
2268: if (!arg || *arg == '\0')
2269: fatal("%s line %d: missing "
2270: "AuthorizedPrincipalsCommandUser argument.",
2271: filename, linenum);
2272: if (*activep && *charptr == NULL)
2273: *charptr = xstrdup(arg);
2274: break;
2275:
1.232 djm 2276: case sAuthenticationMethods:
1.268 djm 2277: if (options->num_auth_methods == 0) {
1.291 djm 2278: value = 0; /* seen "any" pseudo-method */
1.328 djm 2279: value2 = 0; /* successfully parsed any method */
1.232 djm 2280: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 2281: if (strcmp(arg, "any") == 0) {
2282: if (options->num_auth_methods > 0) {
2283: fatal("%s line %d: \"any\" "
2284: "must appear alone in "
2285: "AuthenticationMethods",
2286: filename, linenum);
2287: }
2288: value = 1;
2289: } else if (value) {
2290: fatal("%s line %d: \"any\" must appear "
2291: "alone in AuthenticationMethods",
2292: filename, linenum);
2293: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 2294: fatal("%s line %d: invalid "
2295: "authentication method list.",
2296: filename, linenum);
1.291 djm 2297: }
1.292 djm 2298: value2 = 1;
1.268 djm 2299: if (!*activep)
2300: continue;
1.314 djm 2301: array_append(filename, linenum,
2302: "AuthenticationMethods",
2303: &options->auth_methods,
2304: &options->num_auth_methods, arg);
1.232 djm 2305: }
1.292 djm 2306: if (value2 == 0) {
1.291 djm 2307: fatal("%s line %d: no AuthenticationMethods "
2308: "specified", filename, linenum);
2309: }
1.232 djm 2310: }
2311: return 0;
2312:
1.251 millert 2313: case sStreamLocalBindMask:
2314: arg = strdelim(&cp);
2315: if (!arg || *arg == '\0')
1.268 djm 2316: fatal("%s line %d: missing StreamLocalBindMask "
2317: "argument.", filename, linenum);
1.251 millert 2318: /* Parse mode in octal format */
2319: value = strtol(arg, &p, 8);
2320: if (arg == p || value < 0 || value > 0777)
2321: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 2322: if (*activep)
2323: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 2324: break;
2325:
2326: case sStreamLocalBindUnlink:
2327: intptr = &options->fwd_opts.streamlocal_bind_unlink;
2328: goto parse_flag;
2329:
1.256 djm 2330: case sFingerprintHash:
2331: arg = strdelim(&cp);
2332: if (!arg || *arg == '\0')
2333: fatal("%.200s line %d: Missing argument.",
2334: filename, linenum);
2335: if ((value = ssh_digest_alg_by_name(arg)) == -1)
2336: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
2337: filename, linenum, arg);
2338: if (*activep)
2339: options->fingerprint_hash = value;
2340: break;
2341:
1.309 djm 2342: case sExposeAuthInfo:
2343: intptr = &options->expose_userauth_info;
2344: goto parse_flag;
2345:
1.316 djm 2346: case sRDomain:
2347: charptr = &options->routing_domain;
2348: arg = strdelim(&cp);
2349: if (!arg || *arg == '\0')
2350: fatal("%.200s line %d: Missing argument.",
2351: filename, linenum);
2352: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2353: !valid_rdomain(arg))
2354: fatal("%s line %d: bad routing domain",
2355: filename, linenum);
2356: if (*activep && *charptr == NULL)
2357: *charptr = xstrdup(arg);
1.321 dtucker 2358: break;
1.316 djm 2359:
1.94 markus 2360: case sDeprecated:
1.295 djm 2361: case sIgnore:
1.121 jakob 2362: case sUnsupported:
1.295 djm 2363: do_log2(opcode == sIgnore ?
2364: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2365: "%s line %d: %s option %s", filename, linenum,
2366: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 2367: while (arg)
2368: arg = strdelim(&cp);
2369: break;
2370:
2371: default:
2372: fatal("%s line %d: Missing handler for opcode %s (%d)",
2373: filename, linenum, arg, opcode);
2374: }
2375: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
2376: fatal("%s line %d: garbage at end of line; \"%.200s\".",
2377: filename, linenum, arg);
2378: return 0;
2379: }
2380:
1.360 djm 2381: int
2382: process_server_config_line(ServerOptions *options, char *line,
2383: const char *filename, int linenum, int *activep,
2384: struct connection_info *connectinfo, struct include_list *includes)
2385: {
1.365 djm 2386: int inc_flags = 0;
2387:
1.360 djm 2388: return process_server_config_line_depth(options, line, filename,
1.365 djm 2389: linenum, activep, connectinfo, &inc_flags, 0, includes);
1.360 djm 2390: }
2391:
2392:
1.94 markus 2393: /* Reads the server configuration file. */
1.25 markus 2394:
1.94 markus 2395: void
1.338 markus 2396: load_server_config(const char *filename, struct sshbuf *conf)
1.94 markus 2397: {
1.366 markus 2398: struct stat st;
1.331 markus 2399: char *line = NULL, *cp;
2400: size_t linesize = 0;
1.94 markus 2401: FILE *f;
1.338 markus 2402: int r, lineno = 0;
1.81 stevesk 2403:
1.371 djm 2404: debug2_f("filename %s", filename);
1.134 djm 2405: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2406: perror(filename);
2407: exit(1);
2408: }
1.338 markus 2409: sshbuf_reset(conf);
1.366 markus 2410: /* grow buffer, so realloc is avoided for large config files */
2411: if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
2412: (r = sshbuf_allocate(conf, st.st_size)) != 0)
1.371 djm 2413: fatal_fr(r, "allocate");
1.331 markus 2414: while (getline(&line, &linesize, f) != -1) {
1.229 dtucker 2415: lineno++;
1.134 djm 2416: /*
2417: * Trim out comments and strip whitespace
1.135 deraadt 2418: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2419: * line numbers later for error messages
2420: */
2421: if ((cp = strchr(line, '#')) != NULL)
2422: memcpy(cp, "\n", 2);
2423: cp = line + strspn(line, " \t\r");
1.338 markus 2424: if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
1.371 djm 2425: fatal_fr(r, "sshbuf_put");
1.134 djm 2426: }
1.331 markus 2427: free(line);
1.338 markus 2428: if ((r = sshbuf_put_u8(conf, 0)) != 0)
1.371 djm 2429: fatal_fr(r, "sshbuf_put_u8");
1.134 djm 2430: fclose(f);
1.371 djm 2431: debug2_f("done config len = %zu", sshbuf_len(conf));
1.134 djm 2432: }
2433:
2434: void
1.226 dtucker 2435: parse_server_match_config(ServerOptions *options,
1.360 djm 2436: struct include_list *includes, struct connection_info *connectinfo)
1.153 dtucker 2437: {
2438: ServerOptions mo;
2439:
2440: initialize_server_options(&mo);
1.360 djm 2441: parse_server_config(&mo, "reprocess config", cfg, includes,
2442: connectinfo);
1.168 dtucker 2443: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2444: }
2445:
1.226 dtucker 2446: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2447: {
2448: char *p;
2449:
2450: while ((p = strsep(&spec, ",")) && *p != '\0') {
2451: if (strncmp(p, "addr=", 5) == 0) {
2452: ci->address = xstrdup(p + 5);
2453: } else if (strncmp(p, "host=", 5) == 0) {
2454: ci->host = xstrdup(p + 5);
2455: } else if (strncmp(p, "user=", 5) == 0) {
2456: ci->user = xstrdup(p + 5);
2457: } else if (strncmp(p, "laddr=", 6) == 0) {
2458: ci->laddress = xstrdup(p + 6);
1.317 djm 2459: } else if (strncmp(p, "rdomain=", 8) == 0) {
2460: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2461: } else if (strncmp(p, "lport=", 6) == 0) {
2462: ci->lport = a2port(p + 6);
2463: if (ci->lport == -1) {
2464: fprintf(stderr, "Invalid port '%s' in test mode"
2465: " specification %s\n", p+6, p);
2466: return -1;
2467: }
2468: } else {
2469: fprintf(stderr, "Invalid test mode specification %s\n",
2470: p);
2471: return -1;
2472: }
2473: }
2474: return 0;
2475: }
2476:
1.168 dtucker 2477: /*
2478: * Copy any supported values that are set.
2479: *
1.195 jj 2480: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2481: * array values that are not used pre-authentication, because any that we
1.328 djm 2482: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2483: */
1.153 dtucker 2484: void
1.168 dtucker 2485: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2486: {
1.247 djm 2487: #define M_CP_INTOPT(n) do {\
2488: if (src->n != -1) \
2489: dst->n = src->n; \
2490: } while (0)
2491:
1.168 dtucker 2492: M_CP_INTOPT(password_authentication);
2493: M_CP_INTOPT(gss_authentication);
2494: M_CP_INTOPT(pubkey_authentication);
1.354 djm 2495: M_CP_INTOPT(pubkey_auth_options);
1.168 dtucker 2496: M_CP_INTOPT(kerberos_authentication);
2497: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2498: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2499: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2500: M_CP_INTOPT(permit_root_login);
1.188 djm 2501: M_CP_INTOPT(permit_empty_passwd);
1.362 djm 2502: M_CP_INTOPT(ignore_rhosts);
1.168 dtucker 2503:
2504: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2505: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2506: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2507: M_CP_INTOPT(disable_forwarding);
1.309 djm 2508: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2509: M_CP_INTOPT(permit_tun);
1.251 millert 2510: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2511: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2512: M_CP_INTOPT(x11_display_offset);
2513: M_CP_INTOPT(x11_forwarding);
2514: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2515: M_CP_INTOPT(permit_tty);
1.250 djm 2516: M_CP_INTOPT(permit_user_rc);
1.180 djm 2517: M_CP_INTOPT(max_sessions);
1.184 dtucker 2518: M_CP_INTOPT(max_authtries);
1.300 markus 2519: M_CP_INTOPT(client_alive_count_max);
2520: M_CP_INTOPT(client_alive_interval);
1.213 djm 2521: M_CP_INTOPT(ip_qos_interactive);
2522: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2523: M_CP_INTOPT(rekey_limit);
2524: M_CP_INTOPT(rekey_interval);
1.308 djm 2525: M_CP_INTOPT(log_level);
1.289 djm 2526:
2527: /*
2528: * The bind_mask is a mode_t that may be unsigned, so we can't use
2529: * M_CP_INTOPT - it does a signed comparison that causes compiler
2530: * warnings.
2531: */
1.290 dtucker 2532: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2533: dst->fwd_opts.streamlocal_bind_mask =
2534: src->fwd_opts.streamlocal_bind_mask;
2535: }
1.247 djm 2536:
2537: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2538: #define M_CP_STROPT(n) do {\
2539: if (src->n != NULL && dst->n != src->n) { \
2540: free(dst->n); \
2541: dst->n = src->n; \
2542: } \
2543: } while(0)
1.314 djm 2544: #define M_CP_STRARRAYOPT(s, num_s) do {\
2545: u_int i; \
2546: if (src->num_s != 0) { \
2547: for (i = 0; i < dst->num_s; i++) \
2548: free(dst->s[i]); \
2549: free(dst->s); \
2550: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2551: for (i = 0; i < src->num_s; i++) \
2552: dst->s[i] = xstrdup(src->s[i]); \
2553: dst->num_s = src->num_s; \
1.312 djm 2554: } \
2555: } while(0)
1.168 dtucker 2556:
1.218 djm 2557: /* See comment in servconf.h */
2558: COPY_MATCH_STRING_OPTS();
1.282 djm 2559:
2560: /* Arguments that accept '+...' need to be expanded */
2561: assemble_algorithms(dst);
1.216 djm 2562:
1.217 dtucker 2563: /*
2564: * The only things that should be below this point are string options
2565: * which are only used after authentication.
2566: */
1.168 dtucker 2567: if (preauth)
2568: return;
1.219 djm 2569:
1.283 djm 2570: /* These options may be "none" to clear a global setting */
1.168 dtucker 2571: M_CP_STROPT(adm_forced_command);
1.283 djm 2572: if (option_clear_or_none(dst->adm_forced_command)) {
2573: free(dst->adm_forced_command);
2574: dst->adm_forced_command = NULL;
2575: }
1.176 djm 2576: M_CP_STROPT(chroot_directory);
1.283 djm 2577: if (option_clear_or_none(dst->chroot_directory)) {
2578: free(dst->chroot_directory);
2579: dst->chroot_directory = NULL;
2580: }
1.153 dtucker 2581: }
1.168 dtucker 2582:
2583: #undef M_CP_INTOPT
2584: #undef M_CP_STROPT
1.219 djm 2585: #undef M_CP_STRARRAYOPT
1.153 dtucker 2586:
1.360 djm 2587: #define SERVCONF_MAX_DEPTH 16
1.364 djm 2588: static void
1.360 djm 2589: parse_server_config_depth(ServerOptions *options, const char *filename,
2590: struct sshbuf *conf, struct include_list *includes,
2591: struct connection_info *connectinfo, int flags, int *activep, int depth)
1.134 djm 2592: {
1.360 djm 2593: int linenum, bad_options = 0;
1.136 dtucker 2594: char *cp, *obuf, *cbuf;
1.134 djm 2595:
1.360 djm 2596: if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2597: fatal("Too many recursive configuration includes");
2598:
1.371 djm 2599: debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
1.365 djm 2600: (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
1.134 djm 2601:
1.287 djm 2602: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
1.371 djm 2603: fatal_f("sshbuf_dup_string failed");
1.137 dtucker 2604: linenum = 1;
1.140 deraadt 2605: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.360 djm 2606: if (process_server_config_line_depth(options, cp,
1.365 djm 2607: filename, linenum++, activep, connectinfo, &flags,
1.360 djm 2608: depth, includes) != 0)
1.94 markus 2609: bad_options++;
1.1 deraadt 2610: }
1.239 djm 2611: free(obuf);
1.78 stevesk 2612: if (bad_options > 0)
2613: fatal("%s: terminating, %d bad configuration options",
2614: filename, bad_options);
1.360 djm 2615: }
2616:
2617: void
2618: parse_server_config(ServerOptions *options, const char *filename,
2619: struct sshbuf *conf, struct include_list *includes,
2620: struct connection_info *connectinfo)
2621: {
2622: int active = connectinfo ? 0 : 1;
2623: parse_server_config_depth(options, filename, conf, includes,
1.365 djm 2624: connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
1.364 djm 2625: process_queued_listen_addrs(options);
1.182 dtucker 2626: }
2627:
2628: static const char *
1.221 djm 2629: fmt_multistate_int(int val, const struct multistate *m)
2630: {
2631: u_int i;
2632:
2633: for (i = 0; m[i].key != NULL; i++) {
2634: if (m[i].value == val)
2635: return m[i].key;
2636: }
2637: return "UNKNOWN";
2638: }
2639:
2640: static const char *
1.182 dtucker 2641: fmt_intarg(ServerOpCodes code, int val)
2642: {
1.221 djm 2643: if (val == -1)
2644: return "unset";
2645: switch (code) {
2646: case sAddressFamily:
2647: return fmt_multistate_int(val, multistate_addressfamily);
2648: case sPermitRootLogin:
2649: return fmt_multistate_int(val, multistate_permitrootlogin);
2650: case sGatewayPorts:
2651: return fmt_multistate_int(val, multistate_gatewayports);
2652: case sCompression:
2653: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2654: case sAllowTcpForwarding:
2655: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2656: case sAllowStreamLocalForwarding:
2657: return fmt_multistate_int(val, multistate_tcpfwd);
1.363 djm 2658: case sIgnoreRhosts:
2659: return fmt_multistate_int(val, multistate_ignore_rhosts);
1.256 djm 2660: case sFingerprintHash:
2661: return ssh_digest_alg_name(val);
1.221 djm 2662: default:
2663: switch (val) {
2664: case 0:
2665: return "no";
2666: case 1:
2667: return "yes";
2668: default:
2669: return "UNKNOWN";
2670: }
1.182 dtucker 2671: }
2672: }
2673:
2674: static void
2675: dump_cfg_int(ServerOpCodes code, int val)
2676: {
2677: printf("%s %d\n", lookup_opcode_name(code), val);
2678: }
2679:
2680: static void
1.263 dtucker 2681: dump_cfg_oct(ServerOpCodes code, int val)
2682: {
2683: printf("%s 0%o\n", lookup_opcode_name(code), val);
2684: }
2685:
2686: static void
1.182 dtucker 2687: dump_cfg_fmtint(ServerOpCodes code, int val)
2688: {
2689: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2690: }
2691:
2692: static void
2693: dump_cfg_string(ServerOpCodes code, const char *val)
2694: {
1.257 djm 2695: printf("%s %s\n", lookup_opcode_name(code),
2696: val == NULL ? "none" : val);
1.182 dtucker 2697: }
2698:
2699: static void
2700: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2701: {
2702: u_int i;
2703:
2704: for (i = 0; i < count; i++)
1.219 djm 2705: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2706: }
2707:
2708: static void
2709: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2710: {
2711: u_int i;
2712:
1.291 djm 2713: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2714: return;
1.219 djm 2715: printf("%s", lookup_opcode_name(code));
2716: for (i = 0; i < count; i++)
2717: printf(" %s", vals[i]);
1.291 djm 2718: if (code == sAuthenticationMethods && count == 0)
2719: printf(" any");
1.219 djm 2720: printf("\n");
1.182 dtucker 2721: }
2722:
1.315 djm 2723: static char *
2724: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2725: {
1.315 djm 2726: int r;
1.182 dtucker 2727: struct addrinfo *ai;
1.315 djm 2728: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2729: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2730:
1.263 dtucker 2731: /*
2732: * ListenAddress must be after Port. add_one_listen_addr pushes
2733: * addresses onto a stack, so to maintain ordering we need to
2734: * print these in reverse order.
2735: */
1.315 djm 2736: for (ai = la->addrs; ai; ai = ai->ai_next) {
2737: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2738: sizeof(addr), port, sizeof(port),
2739: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2740: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2741: continue;
2742: }
2743: laddr2 = laddr1;
2744: if (ai->ai_family == AF_INET6) {
2745: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2746: addr, port,
2747: la->rdomain == NULL ? "" : " rdomain ",
2748: la->rdomain == NULL ? "" : la->rdomain,
2749: laddr2);
1.182 dtucker 2750: } else {
1.315 djm 2751: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2752: addr, port,
2753: la->rdomain == NULL ? "" : " rdomain ",
2754: la->rdomain == NULL ? "" : la->rdomain,
2755: laddr2);
1.182 dtucker 2756: }
1.315 djm 2757: free(laddr2);
2758: }
2759: return laddr1;
2760: }
2761:
2762: void
2763: dump_config(ServerOptions *o)
2764: {
2765: char *s;
2766: u_int i;
2767:
2768: /* these are usually at the top of the config */
2769: for (i = 0; i < o->num_ports; i++)
2770: printf("port %d\n", o->ports[i]);
2771: dump_cfg_fmtint(sAddressFamily, o->address_family);
2772:
2773: for (i = 0; i < o->num_listen_addrs; i++) {
2774: s = format_listen_addrs(&o->listen_addrs[i]);
2775: printf("%s", s);
2776: free(s);
1.182 dtucker 2777: }
2778:
2779: /* integer arguments */
2780: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2781: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2782: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2783: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2784: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2785: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2786: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2787:
2788: /* formatted integer arguments */
2789: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2790: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2791: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2792: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2793: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2794: o->hostbased_uses_name_from_packet_only);
2795: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2796: #ifdef KRB5
1.182 dtucker 2797: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2798: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2799: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2800: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2801: #endif
2802: #ifdef GSSAPI
1.182 dtucker 2803: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2804: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2805: #endif
1.182 dtucker 2806: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2807: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2808: o->kbd_interactive_authentication);
2809: dump_cfg_fmtint(sChallengeResponseAuthentication,
2810: o->challenge_response_authentication);
2811: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2812: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2813: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2814: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2815: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2816: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2817: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2818: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2819: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2820: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2821: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2822: dump_cfg_fmtint(sUseDNS, o->use_dns);
2823: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2824: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2825: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2826: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2827: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2828: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2829: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2830:
2831: /* string arguments */
2832: dump_cfg_string(sPidFile, o->pid_file);
2833: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.358 dtucker 2834: dump_cfg_string(sCiphers, o->ciphers);
2835: dump_cfg_string(sMacs, o->macs);
1.182 dtucker 2836: dump_cfg_string(sBanner, o->banner);
2837: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2838: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2839: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2840: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.355 djm 2841: dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
1.208 djm 2842: dump_cfg_string(sAuthorizedPrincipalsFile,
2843: o->authorized_principals_file);
1.261 dtucker 2844: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2845: ? "none" : o->version_addendum);
1.231 djm 2846: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2847: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2848: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2849: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2850: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.358 dtucker 2851: dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
2852: dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
2853: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types);
2854: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
2855: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.316 djm 2856: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2857:
2858: /* string arguments requiring a lookup */
2859: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2860: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2861:
2862: /* string array arguments */
1.219 djm 2863: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2864: o->authorized_keys_files);
1.182 dtucker 2865: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2866: o->host_key_files);
1.261 dtucker 2867: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2868: o->host_cert_files);
1.182 dtucker 2869: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2870: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2871: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2872: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2873: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.332 djm 2874: dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
1.232 djm 2875: dump_cfg_strarray_oneline(sAuthenticationMethods,
2876: o->num_auth_methods, o->auth_methods);
1.370 djm 2877: dump_cfg_strarray_oneline(sLogVerbose,
2878: o->num_log_verbose, o->log_verbose);
1.182 dtucker 2879:
2880: /* other arguments */
2881: for (i = 0; i < o->num_subsystems; i++)
2882: printf("subsystem %s %s\n", o->subsystem_name[i],
2883: o->subsystem_args[i]);
2884:
2885: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2886: o->max_startups_rate, o->max_startups);
1.372 dtucker 2887: printf("persourcemaxstartups ");
2888: if (o->per_source_max_startups == INT_MAX)
2889: printf("none\n");
2890: else
2891: printf("%d\n", o->per_source_max_startups);
1.373 ! dtucker 2892: printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
1.372 dtucker 2893: o->per_source_masklen_ipv6);
1.182 dtucker 2894:
1.318 djm 2895: s = NULL;
2896: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2897: if (tunmode_desc[i].val == o->permit_tun) {
2898: s = tunmode_desc[i].text;
2899: break;
2900: }
1.318 djm 2901: }
1.182 dtucker 2902: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2903:
1.214 stevesk 2904: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2905: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2906:
1.284 dtucker 2907: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2908: o->rekey_interval);
1.182 dtucker 2909:
1.310 djm 2910: printf("permitopen");
2911: if (o->num_permitted_opens == 0)
2912: printf(" any");
2913: else {
2914: for (i = 0; i < o->num_permitted_opens; i++)
2915: printf(" %s", o->permitted_opens[i]);
1.329 djm 2916: }
2917: printf("\n");
1.330 djm 2918: printf("permitlisten");
2919: if (o->num_permitted_listens == 0)
1.329 djm 2920: printf(" any");
2921: else {
1.330 djm 2922: for (i = 0; i < o->num_permitted_listens; i++)
2923: printf(" %s", o->permitted_listens[i]);
1.310 djm 2924: }
2925: printf("\n");
1.334 djm 2926:
1.367 djm 2927: if (o->permit_user_env_allowlist == NULL) {
1.334 djm 2928: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2929: } else {
2930: printf("permituserenvironment %s\n",
1.367 djm 2931: o->permit_user_env_allowlist);
1.334 djm 2932: }
2933:
1.354 djm 2934: printf("pubkeyauthoptions");
2935: if (o->pubkey_auth_options == 0)
2936: printf(" none");
2937: if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
2938: printf(" touch-required");
1.368 djm 2939: if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
2940: printf(" verify-required");
1.354 djm 2941: printf("\n");
1.1 deraadt 2942: }
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