Annotation of src/usr.bin/ssh/servconf.c, Revision 1.370
1.226 dtucker 1:
1.370 ! djm 2: /* $OpenBSD: servconf.c,v 1.369 2020/08/28 03:15:52 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;
1.133 dtucker 150: options->max_authtries = -1;
1.180 djm 151: options->max_sessions = -1;
1.57 markus 152: options->banner = NULL;
1.122 markus 153: options->use_dns = -1;
1.77 beck 154: options->client_alive_interval = -1;
155: options->client_alive_count_max = -1;
1.219 djm 156: options->num_authkeys_files = 0;
1.131 djm 157: options->num_accept_env = 0;
1.332 djm 158: options->num_setenv = 0;
1.145 reyk 159: options->permit_tun = -1;
1.310 djm 160: options->permitted_opens = NULL;
1.330 djm 161: options->permitted_listens = NULL;
1.158 dtucker 162: options->adm_forced_command = NULL;
1.176 djm 163: options->chroot_directory = NULL;
1.231 djm 164: options->authorized_keys_command = NULL;
165: options->authorized_keys_command_user = NULL;
1.204 djm 166: options->revoked_keys_file = NULL;
1.355 djm 167: options->sk_provider = NULL;
1.204 djm 168: options->trusted_user_ca_keys = NULL;
1.208 djm 169: options->authorized_principals_file = NULL;
1.270 djm 170: options->authorized_principals_command = NULL;
171: options->authorized_principals_command_user = NULL;
1.213 djm 172: options->ip_qos_interactive = -1;
173: options->ip_qos_bulk = -1;
1.225 djm 174: options->version_addendum = NULL;
1.256 djm 175: options->fingerprint_hash = -1;
1.301 djm 176: options->disable_forwarding = -1;
1.309 djm 177: options->expose_userauth_info = -1;
1.1 deraadt 178: }
179:
1.257 djm 180: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
181: static int
182: option_clear_or_none(const char *o)
183: {
184: return o == NULL || strcasecmp(o, "none") == 0;
185: }
186:
1.282 djm 187: static void
188: assemble_algorithms(ServerOptions *o)
189: {
1.341 djm 190: char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
1.358 dtucker 191: char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
1.340 djm 192: int r;
1.335 djm 193:
194: all_cipher = cipher_alg_list(',', 0);
195: all_mac = mac_alg_list(',');
196: all_kex = kex_alg_list(',');
197: all_key = sshkey_alg_list(0, 0, 1, ',');
1.341 djm 198: all_sig = sshkey_alg_list(0, 1, 1, ',');
1.358 dtucker 199: /* remove unsupported algos from default lists */
1.367 djm 200: def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
201: def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
202: def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
203: def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
204: def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
1.340 djm 205: #define ASSEMBLE(what, defaults, all) \
206: do { \
207: if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
208: fatal("%s: %s: %s", __func__, #what, ssh_err(r)); \
209: } while (0)
1.358 dtucker 210: ASSEMBLE(ciphers, def_cipher, all_cipher);
211: ASSEMBLE(macs, def_mac, all_mac);
212: ASSEMBLE(kex_algorithms, def_kex, all_kex);
213: ASSEMBLE(hostkeyalgorithms, def_key, all_key);
214: ASSEMBLE(hostbased_key_types, def_key, all_key);
215: ASSEMBLE(pubkey_key_types, def_key, all_key);
216: ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
1.340 djm 217: #undef ASSEMBLE
1.335 djm 218: free(all_cipher);
219: free(all_mac);
220: free(all_kex);
221: free(all_key);
1.341 djm 222: free(all_sig);
1.358 dtucker 223: free(def_cipher);
224: free(def_mac);
225: free(def_kex);
226: free(def_key);
227: free(def_sig);
1.282 djm 228: }
229:
1.314 djm 230: static void
1.344 djm 231: array_append2(const char *file, const int line, const char *directive,
232: char ***array, int **iarray, u_int *lp, const char *s, int i)
1.314 djm 233: {
234:
235: if (*lp >= INT_MAX)
236: fatal("%s line %d: Too many %s entries", file, line, directive);
237:
1.344 djm 238: if (iarray != NULL) {
239: *iarray = xrecallocarray(*iarray, *lp, *lp + 1,
240: sizeof(**iarray));
241: (*iarray)[*lp] = i;
242: }
243:
1.314 djm 244: *array = xrecallocarray(*array, *lp, *lp + 1, sizeof(**array));
245: (*array)[*lp] = xstrdup(s);
246: (*lp)++;
247: }
248:
1.344 djm 249: static void
250: array_append(const char *file, const int line, const char *directive,
251: char ***array, u_int *lp, const char *s)
252: {
253: array_append2(file, line, directive, array, NULL, lp, s, 0);
254: }
255:
1.314 djm 256: void
257: servconf_add_hostkey(const char *file, const int line,
1.344 djm 258: ServerOptions *options, const char *path, int userprovided)
1.314 djm 259: {
260: char *apath = derelativise_path(path);
261:
1.344 djm 262: array_append2(file, line, "HostKey",
263: &options->host_key_files, &options->host_key_file_userprovided,
264: &options->num_host_key_files, apath, userprovided);
1.314 djm 265: free(apath);
266: }
267:
268: void
269: servconf_add_hostcert(const char *file, const int line,
270: ServerOptions *options, const char *path)
271: {
272: char *apath = derelativise_path(path);
273:
274: array_append(file, line, "HostCertificate",
275: &options->host_cert_files, &options->num_host_cert_files, apath);
276: free(apath);
277: }
278:
1.34 markus 279: void
1.25 markus 280: fill_default_server_options(ServerOptions *options)
1.1 deraadt 281: {
1.314 djm 282: u_int i;
1.257 djm 283:
1.54 markus 284: if (options->num_host_key_files == 0) {
1.293 naddy 285: /* fill default hostkeys */
1.314 djm 286: servconf_add_hostkey("[default]", 0, options,
1.344 djm 287: _PATH_HOST_RSA_KEY_FILE, 0);
1.314 djm 288: servconf_add_hostkey("[default]", 0, options,
1.344 djm 289: _PATH_HOST_ECDSA_KEY_FILE, 0);
1.314 djm 290: servconf_add_hostkey("[default]", 0, options,
1.344 djm 291: _PATH_HOST_ED25519_KEY_FILE, 0);
1.326 markus 292: #ifdef WITH_XMSS
1.325 markus 293: servconf_add_hostkey("[default]", 0, options,
1.344 djm 294: _PATH_HOST_XMSS_KEY_FILE, 0);
1.326 markus 295: #endif /* WITH_XMSS */
1.54 markus 296: }
1.203 djm 297: /* No certificates by default */
1.29 markus 298: if (options->num_ports == 0)
299: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 300: if (options->address_family == -1)
301: options->address_family = AF_UNSPEC;
1.29 markus 302: if (options->listen_addrs == NULL)
1.315 djm 303: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 304: if (options->pid_file == NULL)
1.257 djm 305: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 306: if (options->login_grace_time == -1)
1.115 stevesk 307: options->login_grace_time = 120;
1.67 markus 308: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 309: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 310: if (options->ignore_rhosts == -1)
1.30 markus 311: options->ignore_rhosts = 1;
1.25 markus 312: if (options->ignore_user_known_hosts == -1)
313: options->ignore_user_known_hosts = 0;
314: if (options->print_motd == -1)
315: options->print_motd = 1;
1.72 stevesk 316: if (options->print_lastlog == -1)
317: options->print_lastlog = 1;
1.25 markus 318: if (options->x11_forwarding == -1)
1.30 markus 319: options->x11_forwarding = 0;
1.25 markus 320: if (options->x11_display_offset == -1)
1.30 markus 321: options->x11_display_offset = 10;
1.99 stevesk 322: if (options->x11_use_localhost == -1)
323: options->x11_use_localhost = 1;
1.42 markus 324: if (options->xauth_location == NULL)
1.257 djm 325: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 326: if (options->permit_tty == -1)
327: options->permit_tty = 1;
1.250 djm 328: if (options->permit_user_rc == -1)
329: options->permit_user_rc = 1;
1.25 markus 330: if (options->strict_modes == -1)
331: options->strict_modes = 1;
1.129 markus 332: if (options->tcp_keep_alive == -1)
333: options->tcp_keep_alive = 1;
1.101 markus 334: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 335: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 336: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 337: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 338: if (options->hostbased_authentication == -1)
339: options->hostbased_authentication = 0;
340: if (options->hostbased_uses_name_from_packet_only == -1)
341: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 342: if (options->pubkey_authentication == -1)
343: options->pubkey_authentication = 1;
1.354 djm 344: if (options->pubkey_auth_options == -1)
345: options->pubkey_auth_options = 0;
1.25 markus 346: if (options->kerberos_authentication == -1)
1.107 markus 347: options->kerberos_authentication = 0;
1.25 markus 348: if (options->kerberos_or_local_passwd == -1)
349: options->kerberos_or_local_passwd = 1;
350: if (options->kerberos_ticket_cleanup == -1)
351: options->kerberos_ticket_cleanup = 1;
1.130 jakob 352: if (options->kerberos_get_afs_token == -1)
353: options->kerberos_get_afs_token = 0;
1.125 markus 354: if (options->gss_authentication == -1)
355: options->gss_authentication = 0;
356: if (options->gss_cleanup_creds == -1)
357: options->gss_cleanup_creds = 1;
1.271 djm 358: if (options->gss_strict_acceptor == -1)
1.302 djm 359: options->gss_strict_acceptor = 1;
1.25 markus 360: if (options->password_authentication == -1)
361: options->password_authentication = 1;
1.52 markus 362: if (options->kbd_interactive_authentication == -1)
363: options->kbd_interactive_authentication = 0;
1.80 markus 364: if (options->challenge_response_authentication == -1)
365: options->challenge_response_authentication = 1;
1.25 markus 366: if (options->permit_empty_passwd == -1)
1.30 markus 367: options->permit_empty_passwd = 0;
1.334 djm 368: if (options->permit_user_env == -1) {
1.113 markus 369: options->permit_user_env = 0;
1.367 djm 370: options->permit_user_env_allowlist = NULL;
1.334 djm 371: }
1.111 markus 372: if (options->compression == -1)
1.359 dtucker 373: #ifdef WITH_ZLIB
1.337 sf 374: options->compression = COMP_DELAYED;
1.359 dtucker 375: #else
376: options->compression = COMP_NONE;
377: #endif
378:
1.235 dtucker 379: if (options->rekey_limit == -1)
380: options->rekey_limit = 0;
381: if (options->rekey_interval == -1)
382: options->rekey_interval = 0;
1.53 markus 383: if (options->allow_tcp_forwarding == -1)
1.233 djm 384: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 385: if (options->allow_streamlocal_forwarding == -1)
386: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 387: if (options->allow_agent_forwarding == -1)
388: options->allow_agent_forwarding = 1;
1.251 millert 389: if (options->fwd_opts.gateway_ports == -1)
390: options->fwd_opts.gateway_ports = 0;
1.46 markus 391: if (options->max_startups == -1)
1.234 dtucker 392: options->max_startups = 100;
1.50 markus 393: if (options->max_startups_rate == -1)
1.234 dtucker 394: options->max_startups_rate = 30; /* 30% */
1.50 markus 395: if (options->max_startups_begin == -1)
1.234 dtucker 396: options->max_startups_begin = 10;
1.133 dtucker 397: if (options->max_authtries == -1)
398: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 399: if (options->max_sessions == -1)
400: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 401: if (options->use_dns == -1)
1.260 deraadt 402: options->use_dns = 0;
1.77 beck 403: if (options->client_alive_interval == -1)
1.95 deraadt 404: options->client_alive_interval = 0;
1.77 beck 405: if (options->client_alive_count_max == -1)
406: options->client_alive_count_max = 3;
1.219 djm 407: if (options->num_authkeys_files == 0) {
1.314 djm 408: array_append("[default]", 0, "AuthorizedKeysFiles",
409: &options->authorized_keys_files,
410: &options->num_authkeys_files,
411: _PATH_SSH_USER_PERMITTED_KEYS);
412: array_append("[default]", 0, "AuthorizedKeysFiles",
413: &options->authorized_keys_files,
414: &options->num_authkeys_files,
415: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 416: }
1.145 reyk 417: if (options->permit_tun == -1)
1.146 reyk 418: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 419: if (options->ip_qos_interactive == -1)
1.327 job 420: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 421: if (options->ip_qos_bulk == -1)
1.327 job 422: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 423: if (options->version_addendum == NULL)
424: options->version_addendum = xstrdup("");
1.251 millert 425: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
426: options->fwd_opts.streamlocal_bind_mask = 0177;
427: if (options->fwd_opts.streamlocal_bind_unlink == -1)
428: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 429: if (options->fingerprint_hash == -1)
430: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 431: if (options->disable_forwarding == -1)
432: options->disable_forwarding = 0;
1.309 djm 433: if (options->expose_userauth_info == -1)
434: options->expose_userauth_info = 0;
1.355 djm 435: if (options->sk_provider == NULL)
436: options->sk_provider = xstrdup("internal");
1.277 djm 437:
1.282 djm 438: assemble_algorithms(options);
1.277 djm 439:
1.285 djm 440: /* Turn privilege separation and sandboxing on by default */
1.102 provos 441: if (use_privsep == -1)
1.285 djm 442: use_privsep = PRIVSEP_ON;
1.257 djm 443:
444: #define CLEAR_ON_NONE(v) \
445: do { \
446: if (option_clear_or_none(v)) { \
447: free(v); \
448: v = NULL; \
449: } \
450: } while(0)
451: CLEAR_ON_NONE(options->pid_file);
452: CLEAR_ON_NONE(options->xauth_location);
453: CLEAR_ON_NONE(options->banner);
454: CLEAR_ON_NONE(options->trusted_user_ca_keys);
455: CLEAR_ON_NONE(options->revoked_keys_file);
1.355 djm 456: CLEAR_ON_NONE(options->sk_provider);
1.267 djm 457: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 458: CLEAR_ON_NONE(options->adm_forced_command);
459: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 460: CLEAR_ON_NONE(options->routing_domain);
1.357 djm 461: CLEAR_ON_NONE(options->host_key_agent);
1.257 djm 462: for (i = 0; i < options->num_host_key_files; i++)
463: CLEAR_ON_NONE(options->host_key_files[i]);
464: for (i = 0; i < options->num_host_cert_files; i++)
465: CLEAR_ON_NONE(options->host_cert_files[i]);
466: #undef CLEAR_ON_NONE
1.291 djm 467:
468: /* Similar handling for AuthenticationMethods=any */
469: if (options->num_auth_methods == 1 &&
470: strcmp(options->auth_methods[0], "any") == 0) {
471: free(options->auth_methods[0]);
472: options->auth_methods[0] = NULL;
473: options->num_auth_methods = 0;
474: }
1.1 deraadt 475: }
476:
477: /* Keyword tokens. */
1.25 markus 478: typedef enum {
479: sBadOption, /* == unknown option */
1.293 naddy 480: sPort, sHostKeyFile, sLoginGraceTime,
1.370 ! djm 481: sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
1.25 markus 482: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 483: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 484: sPasswordAuthentication, sKbdInteractiveAuthentication,
485: sListenAddress, sAddressFamily,
1.72 stevesk 486: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 487: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 488: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 489: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 490: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 491: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 492: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
493: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 494: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 495: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 496: sHostKeyAlgorithms,
1.258 djm 497: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 498: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
1.332 djm 499: sAcceptEnv, sSetEnv, sPermitTunnel,
1.330 djm 500: sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
1.200 dtucker 501: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.360 djm 502: sHostCertificate, sInclude,
1.208 djm 503: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 504: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.341 djm 505: sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 506: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 507: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 508: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 509: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.355 djm 510: sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
1.295 djm 511: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 512: } ServerOpCodes;
513:
1.360 djm 514: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
515: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
516: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
517: #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
1.365 djm 518: #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
1.153 dtucker 519:
1.1 deraadt 520: /* Textual representation of the tokens. */
1.25 markus 521: static struct {
522: const char *name;
523: ServerOpCodes opcode;
1.153 dtucker 524: u_int flags;
1.25 markus 525: } keywords[] = {
1.153 dtucker 526: { "port", sPort, SSHCFG_GLOBAL },
527: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
528: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 529: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 530: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 531: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 532: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 533: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 534: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 535: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 536: { "loglevel", sLogLevel, SSHCFG_ALL },
1.370 ! djm 537: { "logverbose", sLogVerbose, SSHCFG_ALL },
1.153 dtucker 538: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 539: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 540: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 541: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 542: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 543: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 544: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 545: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 546: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.354 djm 547: { "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
1.153 dtucker 548: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 549: #ifdef KRB5
1.168 dtucker 550: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 551: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
552: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
553: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 554: #else
1.168 dtucker 555: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 556: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
557: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
558: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 559: #endif
1.153 dtucker 560: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
561: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 562: #ifdef GSSAPI
1.168 dtucker 563: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 564: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 565: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 566: #else
1.168 dtucker 567: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 568: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 569: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 570: #endif
1.168 dtucker 571: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
572: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 573: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 574: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
575: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
576: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
577: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
578: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
579: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
1.362 djm 580: { "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
1.153 dtucker 581: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 582: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
583: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
584: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 585: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
586: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 587: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 588: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 589: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 590: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 591: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 592: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
593: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
594: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 595: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 596: { "allowusers", sAllowUsers, SSHCFG_ALL },
597: { "denyusers", sDenyUsers, SSHCFG_ALL },
598: { "allowgroups", sAllowGroups, SSHCFG_ALL },
599: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 600: { "ciphers", sCiphers, SSHCFG_GLOBAL },
601: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 602: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 603: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
604: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
605: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 606: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 607: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 608: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 609: { "usedns", sUseDNS, SSHCFG_GLOBAL },
610: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
611: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 612: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
613: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 614: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 615: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 616: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 617: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.332 djm 618: { "setenv", sSetEnv, SSHCFG_ALL },
1.209 djm 619: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 620: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 621: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 622: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 623: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.330 djm 624: { "permitlisten", sPermitListen, SSHCFG_ALL },
1.158 dtucker 625: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 626: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 627: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 628: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
629: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 630: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 631: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.360 djm 632: { "include", sInclude, SSHCFG_ALL },
1.213 djm 633: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 634: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
635: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 636: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
637: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 638: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 639: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 640: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
641: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
642: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 643: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 644: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 645: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 646: { "rdomain", sRDomain, SSHCFG_ALL },
1.342 djm 647: { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
1.355 djm 648: { "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
1.153 dtucker 649: { NULL, sBadOption, 0 }
1.1 deraadt 650: };
651:
1.182 dtucker 652: static struct {
653: int val;
654: char *text;
655: } tunmode_desc[] = {
656: { SSH_TUNMODE_NO, "no" },
657: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
658: { SSH_TUNMODE_ETHERNET, "ethernet" },
659: { SSH_TUNMODE_YES, "yes" },
660: { -1, NULL }
661: };
662:
1.329 djm 663: /* Returns an opcode name from its number */
664:
665: static const char *
666: lookup_opcode_name(ServerOpCodes code)
667: {
668: u_int i;
669:
670: for (i = 0; keywords[i].name != NULL; i++)
671: if (keywords[i].opcode == code)
672: return(keywords[i].name);
673: return "UNKNOWN";
674: }
675:
676:
1.27 markus 677: /*
1.73 stevesk 678: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 679: */
1.1 deraadt 680:
1.34 markus 681: static ServerOpCodes
1.25 markus 682: parse_token(const char *cp, const char *filename,
1.153 dtucker 683: int linenum, u_int *flags)
1.1 deraadt 684: {
1.55 markus 685: u_int i;
1.1 deraadt 686:
1.25 markus 687: for (i = 0; keywords[i].name; i++)
1.153 dtucker 688: if (strcasecmp(cp, keywords[i].name) == 0) {
689: *flags = keywords[i].flags;
1.25 markus 690: return keywords[i].opcode;
1.153 dtucker 691: }
1.25 markus 692:
1.78 stevesk 693: error("%s: line %d: Bad configuration option: %s",
694: filename, linenum, cp);
1.25 markus 695: return sBadOption;
1.1 deraadt 696: }
697:
1.202 djm 698: char *
699: derelativise_path(const char *path)
700: {
1.259 deraadt 701: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 702:
1.257 djm 703: if (strcasecmp(path, "none") == 0)
704: return xstrdup("none");
1.202 djm 705: expanded = tilde_expand_filename(path, getuid());
1.343 djm 706: if (path_absolute(expanded))
1.202 djm 707: return expanded;
1.207 djm 708: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 709: fatal("%s: getcwd: %s", __func__, strerror(errno));
710: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 711: free(expanded);
1.202 djm 712: return ret;
713: }
714:
1.84 itojun 715: static void
1.315 djm 716: add_listen_addr(ServerOptions *options, const char *addr,
717: const char *rdomain, int port)
1.74 stevesk 718: {
1.142 djm 719: u_int i;
1.74 stevesk 720:
1.315 djm 721: if (port > 0)
722: add_one_listen_addr(options, addr, rdomain, port);
723: else {
724: for (i = 0; i < options->num_ports; i++) {
725: add_one_listen_addr(options, addr, rdomain,
726: options->ports[i]);
727: }
728: }
1.74 stevesk 729: }
730:
1.84 itojun 731: static void
1.315 djm 732: add_one_listen_addr(ServerOptions *options, const char *addr,
733: const char *rdomain, int port)
1.29 markus 734: {
735: struct addrinfo hints, *ai, *aitop;
736: char strport[NI_MAXSERV];
737: int gaierr;
1.315 djm 738: u_int i;
739:
740: /* Find listen_addrs entry for this rdomain */
741: for (i = 0; i < options->num_listen_addrs; i++) {
742: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
743: break;
744: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
745: continue;
746: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
747: break;
748: }
749: if (i >= options->num_listen_addrs) {
750: /* No entry for this rdomain; allocate one */
751: if (i >= INT_MAX)
752: fatal("%s: too many listen addresses", __func__);
753: options->listen_addrs = xrecallocarray(options->listen_addrs,
754: options->num_listen_addrs, options->num_listen_addrs + 1,
755: sizeof(*options->listen_addrs));
756: i = options->num_listen_addrs++;
757: if (rdomain != NULL)
758: options->listen_addrs[i].rdomain = xstrdup(rdomain);
759: }
760: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 761:
1.74 stevesk 762: memset(&hints, 0, sizeof(hints));
1.138 djm 763: hints.ai_family = options->address_family;
1.74 stevesk 764: hints.ai_socktype = SOCK_STREAM;
765: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 766: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 767: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
768: fatal("bad addr or host: %s (%s)",
769: addr ? addr : "<NULL>",
1.173 dtucker 770: ssh_gai_strerror(gaierr));
1.74 stevesk 771: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
772: ;
1.315 djm 773: ai->ai_next = options->listen_addrs[i].addrs;
774: options->listen_addrs[i].addrs = aitop;
775: }
776:
777: /* Returns nonzero if the routing domain name is valid */
778: static int
779: valid_rdomain(const char *name)
780: {
781: const char *errstr;
782: long long num;
783: struct rt_tableinfo info;
784: int mib[6];
785: size_t miblen = sizeof(mib);
786:
787: if (name == NULL)
788: return 1;
789:
790: num = strtonum(name, 0, 255, &errstr);
791: if (errstr != NULL)
792: return 0;
793:
794: /* Check whether the table actually exists */
795: memset(mib, 0, sizeof(mib));
796: mib[0] = CTL_NET;
797: mib[1] = PF_ROUTE;
798: mib[4] = NET_RT_TABLE;
799: mib[5] = (int)num;
800: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
801: return 0;
802:
803: return 1;
1.29 markus 804: }
805:
1.266 dtucker 806: /*
807: * Queue a ListenAddress to be processed once we have all of the Ports
808: * and AddressFamily options.
809: */
810: static void
1.315 djm 811: queue_listen_addr(ServerOptions *options, const char *addr,
812: const char *rdomain, int port)
1.266 dtucker 813: {
1.315 djm 814: struct queued_listenaddr *qla;
815:
816: options->queued_listen_addrs = xrecallocarray(
817: options->queued_listen_addrs,
818: options->num_queued_listens, options->num_queued_listens + 1,
819: sizeof(*options->queued_listen_addrs));
820: qla = &options->queued_listen_addrs[options->num_queued_listens++];
821: qla->addr = xstrdup(addr);
822: qla->port = port;
823: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 824: }
825:
826: /*
827: * Process queued (text) ListenAddress entries.
828: */
829: static void
830: process_queued_listen_addrs(ServerOptions *options)
831: {
832: u_int i;
1.315 djm 833: struct queued_listenaddr *qla;
1.266 dtucker 834:
835: if (options->num_ports == 0)
836: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
837: if (options->address_family == -1)
838: options->address_family = AF_UNSPEC;
839:
840: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 841: qla = &options->queued_listen_addrs[i];
842: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
843: free(qla->addr);
844: free(qla->rdomain);
1.266 dtucker 845: }
846: free(options->queued_listen_addrs);
847: options->queued_listen_addrs = NULL;
848: options->num_queued_listens = 0;
849: }
850:
1.310 djm 851: /*
1.329 djm 852: * Inform channels layer of permitopen options for a single forwarding
853: * direction (local/remote).
1.310 djm 854: */
1.329 djm 855: static void
856: process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
857: char **opens, u_int num_opens)
1.310 djm 858: {
859: u_int i;
860: int port;
1.347 dtucker 861: char *host, *arg, *oarg, ch;
1.329 djm 862: int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
863: const char *what = lookup_opcode_name(opcode);
1.310 djm 864:
1.329 djm 865: channel_clear_permission(ssh, FORWARD_ADM, where);
866: if (num_opens == 0)
1.310 djm 867: return; /* permit any */
868:
869: /* handle keywords: "any" / "none" */
1.329 djm 870: if (num_opens == 1 && strcmp(opens[0], "any") == 0)
1.310 djm 871: return;
1.329 djm 872: if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
873: channel_disable_admin(ssh, where);
1.310 djm 874: return;
875: }
876: /* Otherwise treat it as a list of permitted host:port */
1.329 djm 877: for (i = 0; i < num_opens; i++) {
878: oarg = arg = xstrdup(opens[i]);
1.348 dtucker 879: ch = '\0';
1.347 dtucker 880: host = hpdelim2(&arg, &ch);
881: if (host == NULL || ch == '/')
1.329 djm 882: fatal("%s: missing host in %s", __func__, what);
1.310 djm 883: host = cleanhostname(host);
884: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.329 djm 885: fatal("%s: bad port number in %s", __func__, what);
1.310 djm 886: /* Send it to channels layer */
1.329 djm 887: channel_add_permission(ssh, FORWARD_ADM,
888: where, host, port);
1.310 djm 889: free(oarg);
890: }
891: }
892:
1.329 djm 893: /*
894: * Inform channels layer of permitopen options from configuration.
895: */
896: void
897: process_permitopen(struct ssh *ssh, ServerOptions *options)
898: {
899: process_permitopen_list(ssh, sPermitOpen,
900: options->permitted_opens, options->num_permitted_opens);
1.330 djm 901: process_permitopen_list(ssh, sPermitListen,
902: options->permitted_listens,
903: options->num_permitted_listens);
1.329 djm 904: }
905:
1.226 dtucker 906: struct connection_info *
1.346 djm 907: get_connection_info(struct ssh *ssh, int populate, int use_dns)
1.226 dtucker 908: {
909: static struct connection_info ci;
910:
1.346 djm 911: if (ssh == NULL || !populate)
1.226 dtucker 912: return &ci;
1.286 djm 913: ci.host = auth_get_canonical_hostname(ssh, use_dns);
914: ci.address = ssh_remote_ipaddr(ssh);
915: ci.laddress = ssh_local_ipaddr(ssh);
916: ci.lport = ssh_local_port(ssh);
1.317 djm 917: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 918: return &ci;
919: }
920:
1.153 dtucker 921: /*
922: * The strategy for the Match blocks is that the config file is parsed twice.
923: *
924: * The first time is at startup. activep is initialized to 1 and the
925: * directives in the global context are processed and acted on. Hitting a
926: * Match directive unsets activep and the directives inside the block are
927: * checked for syntax only.
928: *
929: * The second time is after a connection has been established but before
930: * authentication. activep is initialized to 2 and global config directives
931: * are ignored since they have already been processed. If the criteria in a
932: * Match block is met, activep is set and the subsequent directives
933: * processed and actioned until EOF or another Match block unsets it. Any
934: * options set are copied into the main server config.
935: *
936: * Potential additions/improvements:
1.295 djm 937: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 938: *
939: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
940: * Match Address 192.168.0.*
941: * Tag trusted
942: * Match Group wheel
943: * Tag trusted
944: * Match Tag trusted
945: * AllowTcpForwarding yes
946: * GatewayPorts clientspecified
947: * [...]
948: *
949: * - Add a PermittedChannelRequests directive
950: * Match Group shell
951: * PermittedChannelRequests session,forwarded-tcpip
952: */
953:
954: static int
1.165 dtucker 955: match_cfg_line_group(const char *grps, int line, const char *user)
956: {
957: int result = 0;
958: struct passwd *pw;
959:
960: if (user == NULL)
961: goto out;
962:
963: if ((pw = getpwnam(user)) == NULL) {
964: debug("Can't match group at line %d because user %.100s does "
965: "not exist", line, user);
966: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
967: debug("Can't Match group because user %.100s not in any group "
968: "at line %d", user, line);
1.186 djm 969: } else if (ga_match_pattern_list(grps) != 1) {
970: debug("user %.100s does not match group list %.100s at line %d",
971: user, grps, line);
1.165 dtucker 972: } else {
1.186 djm 973: debug("user %.100s matched group list %.100s at line %d", user,
974: grps, line);
1.165 dtucker 975: result = 1;
976: }
977: out:
978: ga_free();
979: return result;
980: }
981:
1.319 dtucker 982: static void
983: match_test_missing_fatal(const char *criteria, const char *attrib)
984: {
985: fatal("'Match %s' in configuration but '%s' not in connection "
986: "test specification.", criteria, attrib);
987: }
988:
1.226 dtucker 989: /*
1.230 dtucker 990: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 991: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 992: * not match.
1.226 dtucker 993: */
1.165 dtucker 994: static int
1.226 dtucker 995: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 996: {
1.243 dtucker 997: int result = 1, attributes = 0, port;
1.153 dtucker 998: char *arg, *attrib, *cp = *condition;
999:
1.226 dtucker 1000: if (ci == NULL)
1.153 dtucker 1001: debug3("checking syntax for 'Match %s'", cp);
1002: else
1.226 dtucker 1003: debug3("checking match for '%s' user %s host %s addr %s "
1004: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
1005: ci->host ? ci->host : "(null)",
1006: ci->address ? ci->address : "(null)",
1007: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 1008:
1009: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 1010: attributes++;
1011: if (strcasecmp(attrib, "all") == 0) {
1012: if (attributes != 1 ||
1013: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1014: error("'all' cannot be combined with other "
1015: "Match attributes");
1016: return -1;
1017: }
1018: *condition = cp;
1019: return 1;
1020: }
1.153 dtucker 1021: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
1022: error("Missing Match criteria for %s", attrib);
1023: return -1;
1024: }
1025: if (strcasecmp(attrib, "user") == 0) {
1.351 dtucker 1026: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.153 dtucker 1027: result = 0;
1028: continue;
1029: }
1.319 dtucker 1030: if (ci->user == NULL)
1031: match_test_missing_fatal("User", "user");
1.349 dtucker 1032: if (match_usergroup_pattern_list(ci->user, arg) != 1)
1.153 dtucker 1033: result = 0;
1034: else
1035: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 1036: "line %d", ci->user, arg, line);
1.165 dtucker 1037: } else if (strcasecmp(attrib, "group") == 0) {
1.351 dtucker 1038: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.226 dtucker 1039: result = 0;
1040: continue;
1041: }
1.319 dtucker 1042: if (ci->user == NULL)
1043: match_test_missing_fatal("Group", "user");
1.226 dtucker 1044: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 1045: case -1:
1046: return -1;
1047: case 0:
1048: result = 0;
1049: }
1.153 dtucker 1050: } else if (strcasecmp(attrib, "host") == 0) {
1.351 dtucker 1051: if (ci == NULL || (ci->test && ci->host == NULL)) {
1.153 dtucker 1052: result = 0;
1053: continue;
1054: }
1.319 dtucker 1055: if (ci->host == NULL)
1056: match_test_missing_fatal("Host", "host");
1.269 djm 1057: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 1058: result = 0;
1059: else
1060: debug("connection from %.100s matched 'Host "
1.226 dtucker 1061: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 1062: } else if (strcasecmp(attrib, "address") == 0) {
1.351 dtucker 1063: if (ci == NULL || (ci->test && ci->address == NULL)) {
1.369 dtucker 1064: if (addr_match_list(NULL, arg) != 0)
1065: fatal("Invalid Match address argument "
1066: "'%s' at line %d", arg, line);
1.226 dtucker 1067: result = 0;
1068: continue;
1069: }
1.319 dtucker 1070: if (ci->address == NULL)
1071: match_test_missing_fatal("Address", "addr");
1.226 dtucker 1072: switch (addr_match_list(ci->address, arg)) {
1.181 djm 1073: case 1:
1074: debug("connection from %.100s matched 'Address "
1.226 dtucker 1075: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 1076: break;
1077: case 0:
1.183 djm 1078: case -1:
1.153 dtucker 1079: result = 0;
1.181 djm 1080: break;
1.183 djm 1081: case -2:
1.181 djm 1082: return -1;
1.153 dtucker 1083: }
1.226 dtucker 1084: } else if (strcasecmp(attrib, "localaddress") == 0){
1.351 dtucker 1085: if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1.369 dtucker 1086: if (addr_match_list(NULL, arg) != 0)
1087: fatal("Invalid Match localaddress "
1088: "argument '%s' at line %d", arg,
1089: line);
1.226 dtucker 1090: result = 0;
1091: continue;
1092: }
1.319 dtucker 1093: if (ci->laddress == NULL)
1094: match_test_missing_fatal("LocalAddress",
1095: "laddr");
1.226 dtucker 1096: switch (addr_match_list(ci->laddress, arg)) {
1097: case 1:
1098: debug("connection from %.100s matched "
1099: "'LocalAddress %.100s' at line %d",
1100: ci->laddress, arg, line);
1101: break;
1102: case 0:
1103: case -1:
1104: result = 0;
1105: break;
1106: case -2:
1107: return -1;
1108: }
1109: } else if (strcasecmp(attrib, "localport") == 0) {
1110: if ((port = a2port(arg)) == -1) {
1111: error("Invalid LocalPort '%s' on Match line",
1112: arg);
1113: return -1;
1114: }
1.351 dtucker 1115: if (ci == NULL || (ci->test && ci->lport == -1)) {
1.226 dtucker 1116: result = 0;
1117: continue;
1118: }
1.319 dtucker 1119: if (ci->lport == 0)
1120: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1121: /* TODO support port lists */
1122: if (port == ci->lport)
1123: debug("connection from %.100s matched "
1124: "'LocalPort %d' at line %d",
1125: ci->laddress, port, line);
1126: else
1127: result = 0;
1.317 djm 1128: } else if (strcasecmp(attrib, "rdomain") == 0) {
1.351 dtucker 1129: if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1.317 djm 1130: result = 0;
1131: continue;
1132: }
1.351 dtucker 1133: if (ci->rdomain == NULL)
1134: match_test_missing_fatal("RDomain", "rdomain");
1.317 djm 1135: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1136: result = 0;
1137: else
1138: debug("user %.100s matched 'RDomain %.100s' at "
1139: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1140: } else {
1141: error("Unsupported Match attribute %s", attrib);
1142: return -1;
1143: }
1.243 dtucker 1144: }
1145: if (attributes == 0) {
1146: error("One or more attributes required for Match");
1147: return -1;
1.153 dtucker 1148: }
1.226 dtucker 1149: if (ci != NULL)
1.153 dtucker 1150: debug3("match %sfound", result ? "" : "not ");
1151: *condition = cp;
1152: return result;
1153: }
1154:
1.158 dtucker 1155: #define WHITESPACE " \t\r\n"
1156:
1.220 djm 1157: /* Multistate option parsing */
1158: struct multistate {
1159: char *key;
1160: int value;
1161: };
1.320 djm 1162: static const struct multistate multistate_flag[] = {
1163: { "yes", 1 },
1164: { "no", 0 },
1165: { NULL, -1 }
1166: };
1.363 djm 1167: static const struct multistate multistate_ignore_rhosts[] = {
1168: { "yes", IGNORE_RHOSTS_YES },
1169: { "no", IGNORE_RHOSTS_NO },
1170: { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1171: { NULL, -1 }
1172: };
1.220 djm 1173: static const struct multistate multistate_addressfamily[] = {
1174: { "inet", AF_INET },
1175: { "inet6", AF_INET6 },
1176: { "any", AF_UNSPEC },
1177: { NULL, -1 }
1178: };
1179: static const struct multistate multistate_permitrootlogin[] = {
1180: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1181: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1182: { "forced-commands-only", PERMIT_FORCED_ONLY },
1183: { "yes", PERMIT_YES },
1184: { "no", PERMIT_NO },
1185: { NULL, -1 }
1186: };
1187: static const struct multistate multistate_compression[] = {
1.359 dtucker 1188: #ifdef WITH_ZLIB
1.337 sf 1189: { "yes", COMP_DELAYED },
1190: { "delayed", COMP_DELAYED },
1.359 dtucker 1191: #endif
1.220 djm 1192: { "no", COMP_NONE },
1193: { NULL, -1 }
1194: };
1195: static const struct multistate multistate_gatewayports[] = {
1196: { "clientspecified", 2 },
1197: { "yes", 1 },
1198: { "no", 0 },
1.222 djm 1199: { NULL, -1 }
1200: };
1.233 djm 1201: static const struct multistate multistate_tcpfwd[] = {
1202: { "yes", FORWARD_ALLOW },
1203: { "all", FORWARD_ALLOW },
1204: { "no", FORWARD_DENY },
1205: { "remote", FORWARD_REMOTE },
1206: { "local", FORWARD_LOCAL },
1207: { NULL, -1 }
1208: };
1.220 djm 1209:
1.360 djm 1210: static int
1211: process_server_config_line_depth(ServerOptions *options, char *line,
1.226 dtucker 1212: const char *filename, int linenum, int *activep,
1.365 djm 1213: struct connection_info *connectinfo, int *inc_flags, int depth,
1.360 djm 1214: struct include_list *includes)
1.1 deraadt 1215: {
1.348 dtucker 1216: char ch, *cp, ***chararrayptr, **charptr, *arg, *arg2, *p;
1.360 djm 1217: int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1.174 dtucker 1218: SyslogFacility *log_facility_ptr;
1219: LogLevel *log_level_ptr;
1.25 markus 1220: ServerOpCodes opcode;
1.329 djm 1221: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1222: size_t len;
1.237 dtucker 1223: long long val64;
1.220 djm 1224: const struct multistate *multistate_ptr;
1.322 dtucker 1225: const char *errstr;
1.360 djm 1226: struct include_item *item;
1227: glob_t gbuf;
1.303 djm 1228:
1229: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1230: if ((len = strlen(line)) == 0)
1231: return 0;
1232: for (len--; len > 0; len--) {
1233: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1234: break;
1235: line[len] = '\0';
1236: }
1.25 markus 1237:
1.94 markus 1238: cp = line;
1.148 dtucker 1239: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1240: return 0;
1.94 markus 1241: /* Ignore leading whitespace */
1242: if (*arg == '\0')
1243: arg = strdelim(&cp);
1244: if (!arg || !*arg || *arg == '#')
1245: return 0;
1246: intptr = NULL;
1247: charptr = NULL;
1.153 dtucker 1248: opcode = parse_token(arg, filename, linenum, &flags);
1249:
1250: if (activep == NULL) { /* We are processing a command line directive */
1251: cmdline = 1;
1252: activep = &cmdline;
1253: }
1.360 djm 1254: if (*activep && opcode != sMatch && opcode != sInclude)
1.153 dtucker 1255: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1256: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1257: if (connectinfo == NULL) {
1.153 dtucker 1258: fatal("%s line %d: Directive '%s' is not allowed "
1259: "within a Match block", filename, linenum, arg);
1260: } else { /* this is a directive we have already processed */
1261: while (arg)
1262: arg = strdelim(&cp);
1263: return 0;
1264: }
1265: }
1266:
1.94 markus 1267: switch (opcode) {
1268: case sBadOption:
1269: return -1;
1270: case sPort:
1271: /* ignore ports from configfile if cmdline specifies ports */
1272: if (options->ports_from_cmdline)
1273: return 0;
1274: if (options->num_ports >= MAX_PORTS)
1275: fatal("%s line %d: too many ports.",
1276: filename, linenum);
1.48 provos 1277: arg = strdelim(&cp);
1.94 markus 1278: if (!arg || *arg == '\0')
1279: fatal("%s line %d: missing port number.",
1280: filename, linenum);
1281: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1282: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1283: fatal("%s line %d: Badly formatted port number.",
1284: filename, linenum);
1285: break;
1.29 markus 1286:
1.94 markus 1287: case sLoginGraceTime:
1288: intptr = &options->login_grace_time;
1.180 djm 1289: parse_time:
1.94 markus 1290: arg = strdelim(&cp);
1291: if (!arg || *arg == '\0')
1292: fatal("%s line %d: missing time value.",
1293: filename, linenum);
1294: if ((value = convtime(arg)) == -1)
1295: fatal("%s line %d: invalid time value.",
1296: filename, linenum);
1.268 djm 1297: if (*activep && *intptr == -1)
1.94 markus 1298: *intptr = value;
1299: break;
1300:
1301: case sListenAddress:
1302: arg = strdelim(&cp);
1.139 djm 1303: if (arg == NULL || *arg == '\0')
1304: fatal("%s line %d: missing address",
1.94 markus 1305: filename, linenum);
1.144 dtucker 1306: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1307: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1308: && strchr(p+1, ':') != NULL) {
1.315 djm 1309: port = 0;
1310: p = arg;
1311: } else {
1.347 dtucker 1312: arg2 = NULL;
1.348 dtucker 1313: ch = '\0';
1.347 dtucker 1314: p = hpdelim2(&arg, &ch);
1315: if (p == NULL || ch == '/')
1.315 djm 1316: fatal("%s line %d: bad address:port usage",
1317: filename, linenum);
1318: p = cleanhostname(p);
1319: if (arg == NULL)
1320: port = 0;
1321: else if ((port = a2port(arg)) <= 0)
1322: fatal("%s line %d: bad port number",
1323: filename, linenum);
1324: }
1325: /* Optional routing table */
1326: arg2 = NULL;
1327: if ((arg = strdelim(&cp)) != NULL) {
1328: if (strcmp(arg, "rdomain") != 0 ||
1329: (arg2 = strdelim(&cp)) == NULL)
1330: fatal("%s line %d: bad ListenAddress syntax",
1331: filename, linenum);
1332: if (!valid_rdomain(arg2))
1333: fatal("%s line %d: bad routing domain",
1334: filename, linenum);
1.144 dtucker 1335: }
1.139 djm 1336:
1.315 djm 1337: queue_listen_addr(options, p, arg2, port);
1.25 markus 1338:
1.138 djm 1339: break;
1340:
1341: case sAddressFamily:
1.220 djm 1342: intptr = &options->address_family;
1343: multistate_ptr = multistate_addressfamily;
1344: parse_multistate:
1.138 djm 1345: arg = strdelim(&cp);
1.141 markus 1346: if (!arg || *arg == '\0')
1.220 djm 1347: fatal("%s line %d: missing argument.",
1.141 markus 1348: filename, linenum);
1.220 djm 1349: value = -1;
1350: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1351: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1352: value = multistate_ptr[i].value;
1353: break;
1354: }
1355: }
1356: if (value == -1)
1357: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1358: filename, linenum, arg);
1.220 djm 1359: if (*activep && *intptr == -1)
1.138 djm 1360: *intptr = value;
1.94 markus 1361: break;
1362:
1363: case sHostKeyFile:
1364: arg = strdelim(&cp);
1365: if (!arg || *arg == '\0')
1366: fatal("%s line %d: missing file name.",
1367: filename, linenum);
1.344 djm 1368: if (*activep) {
1369: servconf_add_hostkey(filename, linenum,
1370: options, arg, 1);
1371: }
1.94 markus 1372: break;
1.76 stevesk 1373:
1.240 markus 1374: case sHostKeyAgent:
1375: charptr = &options->host_key_agent;
1376: arg = strdelim(&cp);
1377: if (!arg || *arg == '\0')
1378: fatal("%s line %d: missing socket name.",
1379: filename, linenum);
1380: if (*activep && *charptr == NULL)
1381: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1382: xstrdup(arg) : derelativise_path(arg);
1383: break;
1384:
1.203 djm 1385: case sHostCertificate:
1.314 djm 1386: arg = strdelim(&cp);
1387: if (!arg || *arg == '\0')
1388: fatal("%s line %d: missing file name.",
1389: filename, linenum);
1390: if (*activep)
1391: servconf_add_hostcert(filename, linenum, options, arg);
1392: break;
1.203 djm 1393:
1.94 markus 1394: case sPidFile:
1395: charptr = &options->pid_file;
1.314 djm 1396: parse_filename:
1397: arg = strdelim(&cp);
1398: if (!arg || *arg == '\0')
1399: fatal("%s line %d: missing file name.",
1400: filename, linenum);
1401: if (*activep && *charptr == NULL) {
1402: *charptr = derelativise_path(arg);
1403: /* increase optional counter */
1404: if (intptr != NULL)
1405: *intptr = *intptr + 1;
1406: }
1407: break;
1.25 markus 1408:
1.94 markus 1409: case sPermitRootLogin:
1410: intptr = &options->permit_root_login;
1.220 djm 1411: multistate_ptr = multistate_permitrootlogin;
1412: goto parse_multistate;
1.36 markus 1413:
1.94 markus 1414: case sIgnoreRhosts:
1415: intptr = &options->ignore_rhosts;
1.363 djm 1416: multistate_ptr = multistate_ignore_rhosts;
1.320 djm 1417: goto parse_multistate;
1.94 markus 1418:
1419: case sIgnoreUserKnownHosts:
1420: intptr = &options->ignore_user_known_hosts;
1.363 djm 1421: parse_flag:
1422: multistate_ptr = multistate_flag;
1423: goto parse_multistate;
1.94 markus 1424:
1425: case sHostbasedAuthentication:
1426: intptr = &options->hostbased_authentication;
1427: goto parse_flag;
1428:
1429: case sHostbasedUsesNameFromPacketOnly:
1430: intptr = &options->hostbased_uses_name_from_packet_only;
1431: goto parse_flag;
1432:
1.258 djm 1433: case sHostbasedAcceptedKeyTypes:
1434: charptr = &options->hostbased_key_types;
1435: parse_keytypes:
1436: arg = strdelim(&cp);
1437: if (!arg || *arg == '\0')
1438: fatal("%s line %d: Missing argument.",
1439: filename, linenum);
1.304 djm 1440: if (*arg != '-' &&
1.352 naddy 1441: !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1442: arg + 1 : arg, 1))
1.258 djm 1443: fatal("%s line %d: Bad key types '%s'.",
1444: filename, linenum, arg ? arg : "<NONE>");
1445: if (*activep && *charptr == NULL)
1446: *charptr = xstrdup(arg);
1447: break;
1448:
1.276 markus 1449: case sHostKeyAlgorithms:
1450: charptr = &options->hostkeyalgorithms;
1451: goto parse_keytypes;
1452:
1.341 djm 1453: case sCASignatureAlgorithms:
1454: charptr = &options->ca_sign_algorithms;
1455: goto parse_keytypes;
1456:
1.94 markus 1457: case sPubkeyAuthentication:
1458: intptr = &options->pubkey_authentication;
1459: goto parse_flag;
1.119 jakob 1460:
1.258 djm 1461: case sPubkeyAcceptedKeyTypes:
1462: charptr = &options->pubkey_key_types;
1463: goto parse_keytypes;
1464:
1.354 djm 1465: case sPubkeyAuthOptions:
1466: intptr = &options->pubkey_auth_options;
1467: value = 0;
1468: while ((arg = strdelim(&cp)) && *arg != '\0') {
1469: if (strcasecmp(arg, "none") == 0)
1470: continue;
1471: if (strcasecmp(arg, "touch-required") == 0)
1472: value |= PUBKEYAUTH_TOUCH_REQUIRED;
1.368 djm 1473: else if (strcasecmp(arg, "verify-required") == 0)
1474: value |= PUBKEYAUTH_VERIFY_REQUIRED;
1.354 djm 1475: else {
1476: fatal("%s line %d: unsupported "
1477: "PubkeyAuthOptions option %s",
1478: filename, linenum, arg);
1479: }
1480: }
1481: if (*activep && *intptr == -1)
1482: *intptr = value;
1483: break;
1484:
1.94 markus 1485: case sKerberosAuthentication:
1486: intptr = &options->kerberos_authentication;
1487: goto parse_flag;
1488:
1489: case sKerberosOrLocalPasswd:
1490: intptr = &options->kerberos_or_local_passwd;
1491: goto parse_flag;
1492:
1493: case sKerberosTicketCleanup:
1494: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1495: goto parse_flag;
1496:
1497: case sKerberosGetAFSToken:
1498: intptr = &options->kerberos_get_afs_token;
1.125 markus 1499: goto parse_flag;
1500:
1501: case sGssAuthentication:
1502: intptr = &options->gss_authentication;
1503: goto parse_flag;
1504:
1505: case sGssCleanupCreds:
1506: intptr = &options->gss_cleanup_creds;
1.271 djm 1507: goto parse_flag;
1508:
1509: case sGssStrictAcceptor:
1510: intptr = &options->gss_strict_acceptor;
1.94 markus 1511: goto parse_flag;
1512:
1513: case sPasswordAuthentication:
1514: intptr = &options->password_authentication;
1515: goto parse_flag;
1516:
1517: case sKbdInteractiveAuthentication:
1518: intptr = &options->kbd_interactive_authentication;
1519: goto parse_flag;
1520:
1521: case sChallengeResponseAuthentication:
1522: intptr = &options->challenge_response_authentication;
1523: goto parse_flag;
1524:
1525: case sPrintMotd:
1526: intptr = &options->print_motd;
1527: goto parse_flag;
1528:
1529: case sPrintLastLog:
1530: intptr = &options->print_lastlog;
1531: goto parse_flag;
1532:
1533: case sX11Forwarding:
1534: intptr = &options->x11_forwarding;
1535: goto parse_flag;
1536:
1537: case sX11DisplayOffset:
1538: intptr = &options->x11_display_offset;
1.293 naddy 1539: parse_int:
1540: arg = strdelim(&cp);
1.322 dtucker 1541: if ((errstr = atoi_err(arg, &value)) != NULL)
1542: fatal("%s line %d: integer value %s.",
1543: filename, linenum, errstr);
1.293 naddy 1544: if (*activep && *intptr == -1)
1545: *intptr = value;
1546: break;
1.99 stevesk 1547:
1548: case sX11UseLocalhost:
1549: intptr = &options->x11_use_localhost;
1550: goto parse_flag;
1.94 markus 1551:
1552: case sXAuthLocation:
1553: charptr = &options->xauth_location;
1554: goto parse_filename;
1555:
1.244 djm 1556: case sPermitTTY:
1557: intptr = &options->permit_tty;
1558: goto parse_flag;
1559:
1.250 djm 1560: case sPermitUserRC:
1561: intptr = &options->permit_user_rc;
1562: goto parse_flag;
1563:
1.94 markus 1564: case sStrictModes:
1565: intptr = &options->strict_modes;
1566: goto parse_flag;
1567:
1.129 markus 1568: case sTCPKeepAlive:
1569: intptr = &options->tcp_keep_alive;
1.94 markus 1570: goto parse_flag;
1571:
1572: case sEmptyPasswd:
1573: intptr = &options->permit_empty_passwd;
1.113 markus 1574: goto parse_flag;
1575:
1576: case sPermitUserEnvironment:
1577: intptr = &options->permit_user_env;
1.367 djm 1578: charptr = &options->permit_user_env_allowlist;
1.334 djm 1579: arg = strdelim(&cp);
1580: if (!arg || *arg == '\0')
1581: fatal("%s line %d: missing argument.",
1582: filename, linenum);
1583: value = 0;
1584: p = NULL;
1585: if (strcmp(arg, "yes") == 0)
1586: value = 1;
1587: else if (strcmp(arg, "no") == 0)
1588: value = 0;
1589: else {
1590: /* Pattern-list specified */
1591: value = 1;
1592: p = xstrdup(arg);
1593: }
1594: if (*activep && *intptr == -1) {
1595: *intptr = value;
1596: *charptr = p;
1597: p = NULL;
1598: }
1599: free(p);
1600: break;
1.94 markus 1601:
1.111 markus 1602: case sCompression:
1603: intptr = &options->compression;
1.220 djm 1604: multistate_ptr = multistate_compression;
1605: goto parse_multistate;
1.94 markus 1606:
1.235 dtucker 1607: case sRekeyLimit:
1608: arg = strdelim(&cp);
1609: if (!arg || *arg == '\0')
1610: fatal("%.200s line %d: Missing argument.", filename,
1611: linenum);
1612: if (strcmp(arg, "default") == 0) {
1613: val64 = 0;
1614: } else {
1.236 dtucker 1615: if (scan_scaled(arg, &val64) == -1)
1616: fatal("%.200s line %d: Bad number '%s': %s",
1617: filename, linenum, arg, strerror(errno));
1.235 dtucker 1618: if (val64 != 0 && val64 < 16)
1619: fatal("%.200s line %d: RekeyLimit too small",
1620: filename, linenum);
1621: }
1622: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1623: options->rekey_limit = val64;
1.235 dtucker 1624: if (cp != NULL) { /* optional rekey interval present */
1625: if (strcmp(cp, "none") == 0) {
1626: (void)strdelim(&cp); /* discard */
1627: break;
1628: }
1629: intptr = &options->rekey_interval;
1630: goto parse_time;
1631: }
1632: break;
1633:
1.94 markus 1634: case sGatewayPorts:
1.251 millert 1635: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1636: multistate_ptr = multistate_gatewayports;
1637: goto parse_multistate;
1.25 markus 1638:
1.122 markus 1639: case sUseDNS:
1640: intptr = &options->use_dns;
1.94 markus 1641: goto parse_flag;
1.53 markus 1642:
1.94 markus 1643: case sLogFacility:
1.174 dtucker 1644: log_facility_ptr = &options->log_facility;
1.94 markus 1645: arg = strdelim(&cp);
1646: value = log_facility_number(arg);
1.101 markus 1647: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1648: fatal("%.200s line %d: unsupported log facility '%s'",
1649: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1650: if (*log_facility_ptr == -1)
1651: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1652: break;
1.25 markus 1653:
1.94 markus 1654: case sLogLevel:
1.174 dtucker 1655: log_level_ptr = &options->log_level;
1.94 markus 1656: arg = strdelim(&cp);
1657: value = log_level_number(arg);
1.101 markus 1658: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1659: fatal("%.200s line %d: unsupported log level '%s'",
1660: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1661: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1662: *log_level_ptr = (LogLevel) value;
1.94 markus 1663: break;
1664:
1.370 ! djm 1665: case sLogVerbose:
! 1666: while ((arg = strdelim(&cp)) && *arg != '\0') {
! 1667: if (!*activep)
! 1668: continue;
! 1669: array_append(filename, linenum, "oLogVerbose",
! 1670: &options->log_verbose, &options->num_log_verbose,
! 1671: arg);
! 1672: }
! 1673: break;
! 1674:
1.94 markus 1675: case sAllowTcpForwarding:
1676: intptr = &options->allow_tcp_forwarding;
1.233 djm 1677: multistate_ptr = multistate_tcpfwd;
1678: goto parse_multistate;
1.102 provos 1679:
1.251 millert 1680: case sAllowStreamLocalForwarding:
1681: intptr = &options->allow_streamlocal_forwarding;
1682: multistate_ptr = multistate_tcpfwd;
1683: goto parse_multistate;
1684:
1.178 pyr 1685: case sAllowAgentForwarding:
1686: intptr = &options->allow_agent_forwarding;
1687: goto parse_flag;
1688:
1.301 djm 1689: case sDisableForwarding:
1690: intptr = &options->disable_forwarding;
1691: goto parse_flag;
1692:
1.94 markus 1693: case sAllowUsers:
1694: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1695: if (match_user(NULL, NULL, NULL, arg) == -1)
1696: fatal("%s line %d: invalid AllowUsers pattern: "
1697: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1698: if (!*activep)
1699: continue;
1.314 djm 1700: array_append(filename, linenum, "AllowUsers",
1701: &options->allow_users, &options->num_allow_users,
1702: arg);
1.94 markus 1703: }
1704: break;
1.25 markus 1705:
1.94 markus 1706: case sDenyUsers:
1707: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1708: if (match_user(NULL, NULL, NULL, arg) == -1)
1709: fatal("%s line %d: invalid DenyUsers pattern: "
1710: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1711: if (!*activep)
1712: continue;
1.314 djm 1713: array_append(filename, linenum, "DenyUsers",
1714: &options->deny_users, &options->num_deny_users,
1715: arg);
1.94 markus 1716: }
1717: break;
1.25 markus 1718:
1.94 markus 1719: case sAllowGroups:
1720: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1721: if (!*activep)
1722: continue;
1.314 djm 1723: array_append(filename, linenum, "AllowGroups",
1724: &options->allow_groups, &options->num_allow_groups,
1725: arg);
1.94 markus 1726: }
1727: break;
1.33 markus 1728:
1.94 markus 1729: case sDenyGroups:
1730: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1731: if (!*activep)
1732: continue;
1.314 djm 1733: array_append(filename, linenum, "DenyGroups",
1734: &options->deny_groups, &options->num_deny_groups,
1735: arg);
1.94 markus 1736: }
1737: break;
1.66 markus 1738:
1.94 markus 1739: case sCiphers:
1740: arg = strdelim(&cp);
1741: if (!arg || *arg == '\0')
1742: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1743: if (*arg != '-' &&
1744: !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1745: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1746: filename, linenum, arg ? arg : "<NONE>");
1747: if (options->ciphers == NULL)
1748: options->ciphers = xstrdup(arg);
1749: break;
1.33 markus 1750:
1.94 markus 1751: case sMacs:
1752: arg = strdelim(&cp);
1753: if (!arg || *arg == '\0')
1754: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1755: if (*arg != '-' &&
1756: !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1757: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1758: filename, linenum, arg ? arg : "<NONE>");
1759: if (options->macs == NULL)
1760: options->macs = xstrdup(arg);
1.211 djm 1761: break;
1762:
1763: case sKexAlgorithms:
1764: arg = strdelim(&cp);
1765: if (!arg || *arg == '\0')
1766: fatal("%s line %d: Missing argument.",
1767: filename, linenum);
1.304 djm 1768: if (*arg != '-' &&
1.352 naddy 1769: !kex_names_valid(*arg == '+' || *arg == '^' ?
1770: arg + 1 : arg))
1.211 djm 1771: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1772: filename, linenum, arg ? arg : "<NONE>");
1773: if (options->kex_algorithms == NULL)
1774: options->kex_algorithms = xstrdup(arg);
1.94 markus 1775: break;
1.43 jakob 1776:
1.94 markus 1777: case sSubsystem:
1778: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1779: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1780: filename, linenum);
1.94 markus 1781: }
1782: arg = strdelim(&cp);
1783: if (!arg || *arg == '\0')
1784: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1785: filename, linenum);
1.153 dtucker 1786: if (!*activep) {
1787: arg = strdelim(&cp);
1788: break;
1789: }
1.94 markus 1790: for (i = 0; i < options->num_subsystems; i++)
1791: if (strcmp(arg, options->subsystem_name[i]) == 0)
1792: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1793: filename, linenum, arg);
1.94 markus 1794: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1795: arg = strdelim(&cp);
1796: if (!arg || *arg == '\0')
1797: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1798: filename, linenum);
1.94 markus 1799: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1800:
1801: /* Collect arguments (separate to executable) */
1802: p = xstrdup(arg);
1803: len = strlen(p) + 1;
1804: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1805: len += 1 + strlen(arg);
1.264 deraadt 1806: p = xreallocarray(p, 1, len);
1.151 djm 1807: strlcat(p, " ", len);
1808: strlcat(p, arg, len);
1809: }
1810: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1811: options->num_subsystems++;
1812: break;
1.46 markus 1813:
1.94 markus 1814: case sMaxStartups:
1815: arg = strdelim(&cp);
1816: if (!arg || *arg == '\0')
1817: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1818: filename, linenum);
1.94 markus 1819: if ((n = sscanf(arg, "%d:%d:%d",
1820: &options->max_startups_begin,
1821: &options->max_startups_rate,
1822: &options->max_startups)) == 3) {
1823: if (options->max_startups_begin >
1824: options->max_startups ||
1825: options->max_startups_rate > 100 ||
1826: options->max_startups_rate < 1)
1.50 markus 1827: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1828: filename, linenum);
1.94 markus 1829: } else if (n != 1)
1830: fatal("%s line %d: Illegal MaxStartups spec.",
1831: filename, linenum);
1832: else
1833: options->max_startups = options->max_startups_begin;
1834: break;
1.133 dtucker 1835:
1836: case sMaxAuthTries:
1837: intptr = &options->max_authtries;
1838: goto parse_int;
1.94 markus 1839:
1.180 djm 1840: case sMaxSessions:
1841: intptr = &options->max_sessions;
1842: goto parse_int;
1843:
1.94 markus 1844: case sBanner:
1845: charptr = &options->banner;
1846: goto parse_filename;
1.176 djm 1847:
1.94 markus 1848: /*
1849: * These options can contain %X options expanded at
1850: * connect time, so that you can specify paths like:
1851: *
1852: * AuthorizedKeysFile /etc/ssh_keys/%u
1853: */
1854: case sAuthorizedKeysFile:
1.219 djm 1855: if (*activep && options->num_authkeys_files == 0) {
1856: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1857: arg = tilde_expand_filename(arg, getuid());
1858: array_append(filename, linenum,
1859: "AuthorizedKeysFile",
1860: &options->authorized_keys_files,
1861: &options->num_authkeys_files, arg);
1862: free(arg);
1.219 djm 1863: }
1864: }
1865: return 0;
1866:
1.208 djm 1867: case sAuthorizedPrincipalsFile:
1868: charptr = &options->authorized_principals_file;
1.205 djm 1869: arg = strdelim(&cp);
1870: if (!arg || *arg == '\0')
1871: fatal("%s line %d: missing file name.",
1872: filename, linenum);
1873: if (*activep && *charptr == NULL) {
1.206 markus 1874: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1875: /* increase optional counter */
1876: if (intptr != NULL)
1877: *intptr = *intptr + 1;
1878: }
1879: break;
1.94 markus 1880:
1881: case sClientAliveInterval:
1882: intptr = &options->client_alive_interval;
1883: goto parse_time;
1884:
1885: case sClientAliveCountMax:
1886: intptr = &options->client_alive_count_max;
1887: goto parse_int;
1.131 djm 1888:
1889: case sAcceptEnv:
1890: while ((arg = strdelim(&cp)) && *arg != '\0') {
1891: if (strchr(arg, '=') != NULL)
1892: fatal("%s line %d: Invalid environment name.",
1893: filename, linenum);
1.153 dtucker 1894: if (!*activep)
1.227 markus 1895: continue;
1.314 djm 1896: array_append(filename, linenum, "AcceptEnv",
1897: &options->accept_env, &options->num_accept_env,
1898: arg);
1.131 djm 1899: }
1900: break;
1.145 reyk 1901:
1.332 djm 1902: case sSetEnv:
1903: uvalue = options->num_setenv;
1904: while ((arg = strdelimw(&cp)) && *arg != '\0') {
1905: if (strchr(arg, '=') == NULL)
1906: fatal("%s line %d: Invalid environment.",
1907: filename, linenum);
1908: if (!*activep || uvalue != 0)
1909: continue;
1910: array_append(filename, linenum, "SetEnv",
1911: &options->setenv, &options->num_setenv, arg);
1912: }
1913: break;
1914:
1.145 reyk 1915: case sPermitTunnel:
1916: intptr = &options->permit_tun;
1.146 reyk 1917: arg = strdelim(&cp);
1918: if (!arg || *arg == '\0')
1919: fatal("%s line %d: Missing yes/point-to-point/"
1920: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1921: value = -1;
1922: for (i = 0; tunmode_desc[i].val != -1; i++)
1923: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1924: value = tunmode_desc[i].val;
1925: break;
1926: }
1927: if (value == -1)
1.146 reyk 1928: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1929: "no argument: %s", filename, linenum, arg);
1.268 djm 1930: if (*activep && *intptr == -1)
1.146 reyk 1931: *intptr = value;
1932: break;
1.94 markus 1933:
1.360 djm 1934: case sInclude:
1935: if (cmdline) {
1936: fatal("Include directive not supported as a "
1937: "command-line option");
1938: }
1939: value = 0;
1940: while ((arg2 = strdelim(&cp)) != NULL && *arg2 != '\0') {
1941: value++;
1942: found = 0;
1943: if (*arg2 != '/' && *arg2 != '~') {
1.361 markus 1944: xasprintf(&arg, "%s/%s", SSHDIR, arg2);
1.360 djm 1945: } else
1946: arg = xstrdup(arg2);
1947:
1948: /*
1949: * Don't let included files clobber the containing
1950: * file's Match state.
1951: */
1952: oactive = *activep;
1953:
1954: /* consult cache of include files */
1955: TAILQ_FOREACH(item, includes, entry) {
1956: if (strcmp(item->selector, arg) != 0)
1957: continue;
1958: if (item->filename != NULL) {
1959: parse_server_config_depth(options,
1960: item->filename, item->contents,
1961: includes, connectinfo,
1.365 djm 1962: (*inc_flags & SSHCFG_MATCH_ONLY
1963: ? SSHCFG_MATCH_ONLY : (oactive
1964: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 1965: activep, depth + 1);
1966: }
1967: found = 1;
1968: *activep = oactive;
1969: }
1970: if (found != 0) {
1971: free(arg);
1972: continue;
1973: }
1974:
1975: /* requested glob was not in cache */
1976: debug2("%s line %d: new include %s",
1977: filename, linenum, arg);
1978: if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
1979: if (r != GLOB_NOMATCH) {
1980: fatal("%s line %d: include \"%s\" "
1981: "glob failed", filename,
1982: linenum, arg);
1983: }
1984: /*
1985: * If no entry matched then record a
1986: * placeholder to skip later glob calls.
1987: */
1988: debug2("%s line %d: no match for %s",
1989: filename, linenum, arg);
1990: item = xcalloc(1, sizeof(*item));
1991: item->selector = strdup(arg);
1992: TAILQ_INSERT_TAIL(includes,
1993: item, entry);
1994: }
1995: if (gbuf.gl_pathc > INT_MAX)
1996: fatal("%s: too many glob results", __func__);
1997: for (n = 0; n < (int)gbuf.gl_pathc; n++) {
1998: debug2("%s line %d: including %s",
1999: filename, linenum, gbuf.gl_pathv[n]);
2000: item = xcalloc(1, sizeof(*item));
2001: item->selector = strdup(arg);
2002: item->filename = strdup(gbuf.gl_pathv[n]);
2003: if ((item->contents = sshbuf_new()) == NULL) {
2004: fatal("%s: sshbuf_new failed",
2005: __func__);
2006: }
2007: load_server_config(item->filename,
2008: item->contents);
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: *activep = oactive;
2017: TAILQ_INSERT_TAIL(includes, item, entry);
2018: }
2019: globfree(&gbuf);
2020: free(arg);
2021: }
2022: if (value == 0) {
2023: fatal("%s line %d: Include missing filename argument",
2024: filename, linenum);
2025: }
2026: break;
2027:
1.153 dtucker 2028: case sMatch:
2029: if (cmdline)
2030: fatal("Match directive not supported as a command-line "
2031: "option");
1.365 djm 2032: value = match_cfg_line(&cp, linenum,
2033: (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
1.153 dtucker 2034: if (value < 0)
2035: fatal("%s line %d: Bad Match condition", filename,
2036: linenum);
1.365 djm 2037: *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
2038: /* The MATCH_ONLY is applicable only until the first match block */
2039: *inc_flags &= ~SSHCFG_MATCH_ONLY;
1.156 dtucker 2040: break;
2041:
1.330 djm 2042: case sPermitListen:
1.156 dtucker 2043: case sPermitOpen:
1.330 djm 2044: if (opcode == sPermitListen) {
2045: uintptr = &options->num_permitted_listens;
2046: chararrayptr = &options->permitted_listens;
1.329 djm 2047: } else {
2048: uintptr = &options->num_permitted_opens;
2049: chararrayptr = &options->permitted_opens;
2050: }
1.156 dtucker 2051: arg = strdelim(&cp);
2052: if (!arg || *arg == '\0')
1.329 djm 2053: fatal("%s line %d: missing %s specification",
2054: filename, linenum, lookup_opcode_name(opcode));
2055: uvalue = *uintptr; /* modified later */
1.310 djm 2056: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 djm 2057: if (*activep && uvalue == 0) {
2058: *uintptr = 1;
2059: *chararrayptr = xcalloc(1,
2060: sizeof(**chararrayptr));
2061: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 2062: }
1.156 dtucker 2063: break;
2064: }
1.159 dtucker 2065: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.333 djm 2066: if (opcode == sPermitListen &&
2067: strchr(arg, ':') == NULL) {
2068: /*
2069: * Allow bare port number for PermitListen
2070: * to indicate a wildcard listen host.
2071: */
2072: xasprintf(&arg2, "*:%s", arg);
2073: } else {
2074: arg2 = xstrdup(arg);
1.348 dtucker 2075: ch = '\0';
1.347 dtucker 2076: p = hpdelim2(&arg, &ch);
2077: if (p == NULL || ch == '/') {
1.333 djm 2078: fatal("%s line %d: missing host in %s",
2079: filename, linenum,
2080: lookup_opcode_name(opcode));
2081: }
2082: p = cleanhostname(p);
1.329 djm 2083: }
2084: if (arg == NULL ||
2085: ((port = permitopen_port(arg)) < 0)) {
2086: fatal("%s line %d: bad port number in %s",
2087: filename, linenum,
2088: lookup_opcode_name(opcode));
2089: }
2090: if (*activep && uvalue == 0) {
1.314 djm 2091: array_append(filename, linenum,
1.329 djm 2092: lookup_opcode_name(opcode),
2093: chararrayptr, uintptr, arg2);
1.314 djm 2094: }
2095: free(arg2);
1.159 dtucker 2096: }
1.153 dtucker 2097: break;
2098:
1.158 dtucker 2099: case sForceCommand:
1.262 dtucker 2100: if (cp == NULL || *cp == '\0')
1.158 dtucker 2101: fatal("%.200s line %d: Missing argument.", filename,
2102: linenum);
2103: len = strspn(cp, WHITESPACE);
2104: if (*activep && options->adm_forced_command == NULL)
2105: options->adm_forced_command = xstrdup(cp + len);
2106: return 0;
2107:
1.176 djm 2108: case sChrootDirectory:
2109: charptr = &options->chroot_directory;
1.177 djm 2110:
2111: arg = strdelim(&cp);
2112: if (!arg || *arg == '\0')
2113: fatal("%s line %d: missing file name.",
2114: filename, linenum);
2115: if (*activep && *charptr == NULL)
2116: *charptr = xstrdup(arg);
2117: break;
1.176 djm 2118:
1.204 djm 2119: case sTrustedUserCAKeys:
2120: charptr = &options->trusted_user_ca_keys;
2121: goto parse_filename;
2122:
2123: case sRevokedKeys:
2124: charptr = &options->revoked_keys_file;
2125: goto parse_filename;
2126:
1.355 djm 2127: case sSecurityKeyProvider:
2128: charptr = &options->sk_provider;
1.356 djm 2129: arg = strdelim(&cp);
2130: if (!arg || *arg == '\0')
2131: fatal("%s line %d: missing file name.",
2132: filename, linenum);
2133: if (*activep && *charptr == NULL) {
2134: *charptr = strcasecmp(arg, "internal") == 0 ?
2135: xstrdup(arg) : derelativise_path(arg);
2136: /* increase optional counter */
2137: if (intptr != NULL)
2138: *intptr = *intptr + 1;
2139: }
2140: break;
1.355 djm 2141:
1.213 djm 2142: case sIPQoS:
2143: arg = strdelim(&cp);
2144: if ((value = parse_ipqos(arg)) == -1)
2145: fatal("%s line %d: Bad IPQoS value: %s",
2146: filename, linenum, arg);
2147: arg = strdelim(&cp);
2148: if (arg == NULL)
2149: value2 = value;
2150: else if ((value2 = parse_ipqos(arg)) == -1)
2151: fatal("%s line %d: Bad IPQoS value: %s",
2152: filename, linenum, arg);
2153: if (*activep) {
2154: options->ip_qos_interactive = value;
2155: options->ip_qos_bulk = value2;
2156: }
2157: break;
2158:
1.225 djm 2159: case sVersionAddendum:
1.262 dtucker 2160: if (cp == NULL || *cp == '\0')
1.225 djm 2161: fatal("%.200s line %d: Missing argument.", filename,
2162: linenum);
2163: len = strspn(cp, WHITESPACE);
2164: if (*activep && options->version_addendum == NULL) {
2165: if (strcasecmp(cp + len, "none") == 0)
2166: options->version_addendum = xstrdup("");
2167: else if (strchr(cp + len, '\r') != NULL)
2168: fatal("%.200s line %d: Invalid argument",
2169: filename, linenum);
2170: else
2171: options->version_addendum = xstrdup(cp + len);
2172: }
2173: return 0;
2174:
1.231 djm 2175: case sAuthorizedKeysCommand:
1.255 jsg 2176: if (cp == NULL)
2177: fatal("%.200s line %d: Missing argument.", filename,
2178: linenum);
1.231 djm 2179: len = strspn(cp, WHITESPACE);
2180: if (*activep && options->authorized_keys_command == NULL) {
2181: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2182: fatal("%.200s line %d: AuthorizedKeysCommand "
2183: "must be an absolute path",
2184: filename, linenum);
2185: options->authorized_keys_command = xstrdup(cp + len);
2186: }
2187: return 0;
2188:
2189: case sAuthorizedKeysCommandUser:
2190: charptr = &options->authorized_keys_command_user;
2191:
2192: arg = strdelim(&cp);
1.255 jsg 2193: if (!arg || *arg == '\0')
2194: fatal("%s line %d: missing AuthorizedKeysCommandUser "
2195: "argument.", filename, linenum);
1.231 djm 2196: if (*activep && *charptr == NULL)
2197: *charptr = xstrdup(arg);
2198: break;
2199:
1.270 djm 2200: case sAuthorizedPrincipalsCommand:
2201: if (cp == NULL)
2202: fatal("%.200s line %d: Missing argument.", filename,
2203: linenum);
2204: len = strspn(cp, WHITESPACE);
2205: if (*activep &&
2206: options->authorized_principals_command == NULL) {
2207: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2208: fatal("%.200s line %d: "
2209: "AuthorizedPrincipalsCommand must be "
2210: "an absolute path", filename, linenum);
2211: options->authorized_principals_command =
2212: xstrdup(cp + len);
2213: }
2214: return 0;
2215:
2216: case sAuthorizedPrincipalsCommandUser:
2217: charptr = &options->authorized_principals_command_user;
2218:
2219: arg = strdelim(&cp);
2220: if (!arg || *arg == '\0')
2221: fatal("%s line %d: missing "
2222: "AuthorizedPrincipalsCommandUser argument.",
2223: filename, linenum);
2224: if (*activep && *charptr == NULL)
2225: *charptr = xstrdup(arg);
2226: break;
2227:
1.232 djm 2228: case sAuthenticationMethods:
1.268 djm 2229: if (options->num_auth_methods == 0) {
1.291 djm 2230: value = 0; /* seen "any" pseudo-method */
1.328 djm 2231: value2 = 0; /* successfully parsed any method */
1.232 djm 2232: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 2233: if (strcmp(arg, "any") == 0) {
2234: if (options->num_auth_methods > 0) {
2235: fatal("%s line %d: \"any\" "
2236: "must appear alone in "
2237: "AuthenticationMethods",
2238: filename, linenum);
2239: }
2240: value = 1;
2241: } else if (value) {
2242: fatal("%s line %d: \"any\" must appear "
2243: "alone in AuthenticationMethods",
2244: filename, linenum);
2245: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 2246: fatal("%s line %d: invalid "
2247: "authentication method list.",
2248: filename, linenum);
1.291 djm 2249: }
1.292 djm 2250: value2 = 1;
1.268 djm 2251: if (!*activep)
2252: continue;
1.314 djm 2253: array_append(filename, linenum,
2254: "AuthenticationMethods",
2255: &options->auth_methods,
2256: &options->num_auth_methods, arg);
1.232 djm 2257: }
1.292 djm 2258: if (value2 == 0) {
1.291 djm 2259: fatal("%s line %d: no AuthenticationMethods "
2260: "specified", filename, linenum);
2261: }
1.232 djm 2262: }
2263: return 0;
2264:
1.251 millert 2265: case sStreamLocalBindMask:
2266: arg = strdelim(&cp);
2267: if (!arg || *arg == '\0')
1.268 djm 2268: fatal("%s line %d: missing StreamLocalBindMask "
2269: "argument.", filename, linenum);
1.251 millert 2270: /* Parse mode in octal format */
2271: value = strtol(arg, &p, 8);
2272: if (arg == p || value < 0 || value > 0777)
2273: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 2274: if (*activep)
2275: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 2276: break;
2277:
2278: case sStreamLocalBindUnlink:
2279: intptr = &options->fwd_opts.streamlocal_bind_unlink;
2280: goto parse_flag;
2281:
1.256 djm 2282: case sFingerprintHash:
2283: arg = strdelim(&cp);
2284: if (!arg || *arg == '\0')
2285: fatal("%.200s line %d: Missing argument.",
2286: filename, linenum);
2287: if ((value = ssh_digest_alg_by_name(arg)) == -1)
2288: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
2289: filename, linenum, arg);
2290: if (*activep)
2291: options->fingerprint_hash = value;
2292: break;
2293:
1.309 djm 2294: case sExposeAuthInfo:
2295: intptr = &options->expose_userauth_info;
2296: goto parse_flag;
2297:
1.316 djm 2298: case sRDomain:
2299: charptr = &options->routing_domain;
2300: arg = strdelim(&cp);
2301: if (!arg || *arg == '\0')
2302: fatal("%.200s line %d: Missing argument.",
2303: filename, linenum);
2304: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2305: !valid_rdomain(arg))
2306: fatal("%s line %d: bad routing domain",
2307: filename, linenum);
2308: if (*activep && *charptr == NULL)
2309: *charptr = xstrdup(arg);
1.321 dtucker 2310: break;
1.316 djm 2311:
1.94 markus 2312: case sDeprecated:
1.295 djm 2313: case sIgnore:
1.121 jakob 2314: case sUnsupported:
1.295 djm 2315: do_log2(opcode == sIgnore ?
2316: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2317: "%s line %d: %s option %s", filename, linenum,
2318: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 2319: while (arg)
2320: arg = strdelim(&cp);
2321: break;
2322:
2323: default:
2324: fatal("%s line %d: Missing handler for opcode %s (%d)",
2325: filename, linenum, arg, opcode);
2326: }
2327: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
2328: fatal("%s line %d: garbage at end of line; \"%.200s\".",
2329: filename, linenum, arg);
2330: return 0;
2331: }
2332:
1.360 djm 2333: int
2334: process_server_config_line(ServerOptions *options, char *line,
2335: const char *filename, int linenum, int *activep,
2336: struct connection_info *connectinfo, struct include_list *includes)
2337: {
1.365 djm 2338: int inc_flags = 0;
2339:
1.360 djm 2340: return process_server_config_line_depth(options, line, filename,
1.365 djm 2341: linenum, activep, connectinfo, &inc_flags, 0, includes);
1.360 djm 2342: }
2343:
2344:
1.94 markus 2345: /* Reads the server configuration file. */
1.25 markus 2346:
1.94 markus 2347: void
1.338 markus 2348: load_server_config(const char *filename, struct sshbuf *conf)
1.94 markus 2349: {
1.366 markus 2350: struct stat st;
1.331 markus 2351: char *line = NULL, *cp;
2352: size_t linesize = 0;
1.94 markus 2353: FILE *f;
1.338 markus 2354: int r, lineno = 0;
1.81 stevesk 2355:
1.134 djm 2356: debug2("%s: filename %s", __func__, filename);
2357: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2358: perror(filename);
2359: exit(1);
2360: }
1.338 markus 2361: sshbuf_reset(conf);
1.366 markus 2362: /* grow buffer, so realloc is avoided for large config files */
2363: if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
2364: (r = sshbuf_allocate(conf, st.st_size)) != 0)
2365: fatal("%s: allocate failed: %s", __func__, ssh_err(r));
1.331 markus 2366: while (getline(&line, &linesize, f) != -1) {
1.229 dtucker 2367: lineno++;
1.134 djm 2368: /*
2369: * Trim out comments and strip whitespace
1.135 deraadt 2370: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2371: * line numbers later for error messages
2372: */
2373: if ((cp = strchr(line, '#')) != NULL)
2374: memcpy(cp, "\n", 2);
2375: cp = line + strspn(line, " \t\r");
1.338 markus 2376: if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
2377: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.134 djm 2378: }
1.331 markus 2379: free(line);
1.338 markus 2380: if ((r = sshbuf_put_u8(conf, 0)) != 0)
2381: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.134 djm 2382: fclose(f);
1.338 markus 2383: debug2("%s: done config len = %zu", __func__, sshbuf_len(conf));
1.134 djm 2384: }
2385:
2386: void
1.226 dtucker 2387: parse_server_match_config(ServerOptions *options,
1.360 djm 2388: struct include_list *includes, struct connection_info *connectinfo)
1.153 dtucker 2389: {
2390: ServerOptions mo;
2391:
2392: initialize_server_options(&mo);
1.360 djm 2393: parse_server_config(&mo, "reprocess config", cfg, includes,
2394: connectinfo);
1.168 dtucker 2395: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2396: }
2397:
1.226 dtucker 2398: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2399: {
2400: char *p;
2401:
2402: while ((p = strsep(&spec, ",")) && *p != '\0') {
2403: if (strncmp(p, "addr=", 5) == 0) {
2404: ci->address = xstrdup(p + 5);
2405: } else if (strncmp(p, "host=", 5) == 0) {
2406: ci->host = xstrdup(p + 5);
2407: } else if (strncmp(p, "user=", 5) == 0) {
2408: ci->user = xstrdup(p + 5);
2409: } else if (strncmp(p, "laddr=", 6) == 0) {
2410: ci->laddress = xstrdup(p + 6);
1.317 djm 2411: } else if (strncmp(p, "rdomain=", 8) == 0) {
2412: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2413: } else if (strncmp(p, "lport=", 6) == 0) {
2414: ci->lport = a2port(p + 6);
2415: if (ci->lport == -1) {
2416: fprintf(stderr, "Invalid port '%s' in test mode"
2417: " specification %s\n", p+6, p);
2418: return -1;
2419: }
2420: } else {
2421: fprintf(stderr, "Invalid test mode specification %s\n",
2422: p);
2423: return -1;
2424: }
2425: }
2426: return 0;
2427: }
2428:
1.168 dtucker 2429: /*
2430: * Copy any supported values that are set.
2431: *
1.195 jj 2432: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2433: * array values that are not used pre-authentication, because any that we
1.328 djm 2434: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2435: */
1.153 dtucker 2436: void
1.168 dtucker 2437: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2438: {
1.247 djm 2439: #define M_CP_INTOPT(n) do {\
2440: if (src->n != -1) \
2441: dst->n = src->n; \
2442: } while (0)
2443:
1.168 dtucker 2444: M_CP_INTOPT(password_authentication);
2445: M_CP_INTOPT(gss_authentication);
2446: M_CP_INTOPT(pubkey_authentication);
1.354 djm 2447: M_CP_INTOPT(pubkey_auth_options);
1.168 dtucker 2448: M_CP_INTOPT(kerberos_authentication);
2449: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2450: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2451: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2452: M_CP_INTOPT(permit_root_login);
1.188 djm 2453: M_CP_INTOPT(permit_empty_passwd);
1.362 djm 2454: M_CP_INTOPT(ignore_rhosts);
1.168 dtucker 2455:
2456: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2457: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2458: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2459: M_CP_INTOPT(disable_forwarding);
1.309 djm 2460: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2461: M_CP_INTOPT(permit_tun);
1.251 millert 2462: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2463: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2464: M_CP_INTOPT(x11_display_offset);
2465: M_CP_INTOPT(x11_forwarding);
2466: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2467: M_CP_INTOPT(permit_tty);
1.250 djm 2468: M_CP_INTOPT(permit_user_rc);
1.180 djm 2469: M_CP_INTOPT(max_sessions);
1.184 dtucker 2470: M_CP_INTOPT(max_authtries);
1.300 markus 2471: M_CP_INTOPT(client_alive_count_max);
2472: M_CP_INTOPT(client_alive_interval);
1.213 djm 2473: M_CP_INTOPT(ip_qos_interactive);
2474: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2475: M_CP_INTOPT(rekey_limit);
2476: M_CP_INTOPT(rekey_interval);
1.308 djm 2477: M_CP_INTOPT(log_level);
1.289 djm 2478:
2479: /*
2480: * The bind_mask is a mode_t that may be unsigned, so we can't use
2481: * M_CP_INTOPT - it does a signed comparison that causes compiler
2482: * warnings.
2483: */
1.290 dtucker 2484: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2485: dst->fwd_opts.streamlocal_bind_mask =
2486: src->fwd_opts.streamlocal_bind_mask;
2487: }
1.247 djm 2488:
2489: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2490: #define M_CP_STROPT(n) do {\
2491: if (src->n != NULL && dst->n != src->n) { \
2492: free(dst->n); \
2493: dst->n = src->n; \
2494: } \
2495: } while(0)
1.314 djm 2496: #define M_CP_STRARRAYOPT(s, num_s) do {\
2497: u_int i; \
2498: if (src->num_s != 0) { \
2499: for (i = 0; i < dst->num_s; i++) \
2500: free(dst->s[i]); \
2501: free(dst->s); \
2502: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2503: for (i = 0; i < src->num_s; i++) \
2504: dst->s[i] = xstrdup(src->s[i]); \
2505: dst->num_s = src->num_s; \
1.312 djm 2506: } \
2507: } while(0)
1.168 dtucker 2508:
1.218 djm 2509: /* See comment in servconf.h */
2510: COPY_MATCH_STRING_OPTS();
1.282 djm 2511:
2512: /* Arguments that accept '+...' need to be expanded */
2513: assemble_algorithms(dst);
1.216 djm 2514:
1.217 dtucker 2515: /*
2516: * The only things that should be below this point are string options
2517: * which are only used after authentication.
2518: */
1.168 dtucker 2519: if (preauth)
2520: return;
1.219 djm 2521:
1.283 djm 2522: /* These options may be "none" to clear a global setting */
1.168 dtucker 2523: M_CP_STROPT(adm_forced_command);
1.283 djm 2524: if (option_clear_or_none(dst->adm_forced_command)) {
2525: free(dst->adm_forced_command);
2526: dst->adm_forced_command = NULL;
2527: }
1.176 djm 2528: M_CP_STROPT(chroot_directory);
1.283 djm 2529: if (option_clear_or_none(dst->chroot_directory)) {
2530: free(dst->chroot_directory);
2531: dst->chroot_directory = NULL;
2532: }
1.153 dtucker 2533: }
1.168 dtucker 2534:
2535: #undef M_CP_INTOPT
2536: #undef M_CP_STROPT
1.219 djm 2537: #undef M_CP_STRARRAYOPT
1.153 dtucker 2538:
1.360 djm 2539: #define SERVCONF_MAX_DEPTH 16
1.364 djm 2540: static void
1.360 djm 2541: parse_server_config_depth(ServerOptions *options, const char *filename,
2542: struct sshbuf *conf, struct include_list *includes,
2543: struct connection_info *connectinfo, int flags, int *activep, int depth)
1.134 djm 2544: {
1.360 djm 2545: int linenum, bad_options = 0;
1.136 dtucker 2546: char *cp, *obuf, *cbuf;
1.134 djm 2547:
1.360 djm 2548: if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2549: fatal("Too many recursive configuration includes");
2550:
1.365 djm 2551: debug2("%s: config %s len %zu%s", __func__, filename, sshbuf_len(conf),
2552: (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
1.134 djm 2553:
1.287 djm 2554: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
2555: fatal("%s: sshbuf_dup_string failed", __func__);
1.137 dtucker 2556: linenum = 1;
1.140 deraadt 2557: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.360 djm 2558: if (process_server_config_line_depth(options, cp,
1.365 djm 2559: filename, linenum++, activep, connectinfo, &flags,
1.360 djm 2560: depth, includes) != 0)
1.94 markus 2561: bad_options++;
1.1 deraadt 2562: }
1.239 djm 2563: free(obuf);
1.78 stevesk 2564: if (bad_options > 0)
2565: fatal("%s: terminating, %d bad configuration options",
2566: filename, bad_options);
1.360 djm 2567: }
2568:
2569: void
2570: parse_server_config(ServerOptions *options, const char *filename,
2571: struct sshbuf *conf, struct include_list *includes,
2572: struct connection_info *connectinfo)
2573: {
2574: int active = connectinfo ? 0 : 1;
2575: parse_server_config_depth(options, filename, conf, includes,
1.365 djm 2576: connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
1.364 djm 2577: process_queued_listen_addrs(options);
1.182 dtucker 2578: }
2579:
2580: static const char *
1.221 djm 2581: fmt_multistate_int(int val, const struct multistate *m)
2582: {
2583: u_int i;
2584:
2585: for (i = 0; m[i].key != NULL; i++) {
2586: if (m[i].value == val)
2587: return m[i].key;
2588: }
2589: return "UNKNOWN";
2590: }
2591:
2592: static const char *
1.182 dtucker 2593: fmt_intarg(ServerOpCodes code, int val)
2594: {
1.221 djm 2595: if (val == -1)
2596: return "unset";
2597: switch (code) {
2598: case sAddressFamily:
2599: return fmt_multistate_int(val, multistate_addressfamily);
2600: case sPermitRootLogin:
2601: return fmt_multistate_int(val, multistate_permitrootlogin);
2602: case sGatewayPorts:
2603: return fmt_multistate_int(val, multistate_gatewayports);
2604: case sCompression:
2605: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2606: case sAllowTcpForwarding:
2607: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2608: case sAllowStreamLocalForwarding:
2609: return fmt_multistate_int(val, multistate_tcpfwd);
1.363 djm 2610: case sIgnoreRhosts:
2611: return fmt_multistate_int(val, multistate_ignore_rhosts);
1.256 djm 2612: case sFingerprintHash:
2613: return ssh_digest_alg_name(val);
1.221 djm 2614: default:
2615: switch (val) {
2616: case 0:
2617: return "no";
2618: case 1:
2619: return "yes";
2620: default:
2621: return "UNKNOWN";
2622: }
1.182 dtucker 2623: }
2624: }
2625:
2626: static void
2627: dump_cfg_int(ServerOpCodes code, int val)
2628: {
2629: printf("%s %d\n", lookup_opcode_name(code), val);
2630: }
2631:
2632: static void
1.263 dtucker 2633: dump_cfg_oct(ServerOpCodes code, int val)
2634: {
2635: printf("%s 0%o\n", lookup_opcode_name(code), val);
2636: }
2637:
2638: static void
1.182 dtucker 2639: dump_cfg_fmtint(ServerOpCodes code, int val)
2640: {
2641: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2642: }
2643:
2644: static void
2645: dump_cfg_string(ServerOpCodes code, const char *val)
2646: {
1.257 djm 2647: printf("%s %s\n", lookup_opcode_name(code),
2648: val == NULL ? "none" : val);
1.182 dtucker 2649: }
2650:
2651: static void
2652: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2653: {
2654: u_int i;
2655:
2656: for (i = 0; i < count; i++)
1.219 djm 2657: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2658: }
2659:
2660: static void
2661: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2662: {
2663: u_int i;
2664:
1.291 djm 2665: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2666: return;
1.219 djm 2667: printf("%s", lookup_opcode_name(code));
2668: for (i = 0; i < count; i++)
2669: printf(" %s", vals[i]);
1.291 djm 2670: if (code == sAuthenticationMethods && count == 0)
2671: printf(" any");
1.219 djm 2672: printf("\n");
1.182 dtucker 2673: }
2674:
1.315 djm 2675: static char *
2676: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2677: {
1.315 djm 2678: int r;
1.182 dtucker 2679: struct addrinfo *ai;
1.315 djm 2680: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2681: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2682:
1.263 dtucker 2683: /*
2684: * ListenAddress must be after Port. add_one_listen_addr pushes
2685: * addresses onto a stack, so to maintain ordering we need to
2686: * print these in reverse order.
2687: */
1.315 djm 2688: for (ai = la->addrs; ai; ai = ai->ai_next) {
2689: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2690: sizeof(addr), port, sizeof(port),
2691: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2692: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2693: continue;
2694: }
2695: laddr2 = laddr1;
2696: if (ai->ai_family == AF_INET6) {
2697: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2698: addr, port,
2699: la->rdomain == NULL ? "" : " rdomain ",
2700: la->rdomain == NULL ? "" : la->rdomain,
2701: laddr2);
1.182 dtucker 2702: } else {
1.315 djm 2703: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2704: addr, port,
2705: la->rdomain == NULL ? "" : " rdomain ",
2706: la->rdomain == NULL ? "" : la->rdomain,
2707: laddr2);
1.182 dtucker 2708: }
1.315 djm 2709: free(laddr2);
2710: }
2711: return laddr1;
2712: }
2713:
2714: void
2715: dump_config(ServerOptions *o)
2716: {
2717: char *s;
2718: u_int i;
2719:
2720: /* these are usually at the top of the config */
2721: for (i = 0; i < o->num_ports; i++)
2722: printf("port %d\n", o->ports[i]);
2723: dump_cfg_fmtint(sAddressFamily, o->address_family);
2724:
2725: for (i = 0; i < o->num_listen_addrs; i++) {
2726: s = format_listen_addrs(&o->listen_addrs[i]);
2727: printf("%s", s);
2728: free(s);
1.182 dtucker 2729: }
2730:
2731: /* integer arguments */
2732: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2733: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2734: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2735: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2736: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2737: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2738: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2739:
2740: /* formatted integer arguments */
2741: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2742: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2743: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2744: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2745: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2746: o->hostbased_uses_name_from_packet_only);
2747: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2748: #ifdef KRB5
1.182 dtucker 2749: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2750: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2751: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2752: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2753: #endif
2754: #ifdef GSSAPI
1.182 dtucker 2755: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2756: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2757: #endif
1.182 dtucker 2758: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2759: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2760: o->kbd_interactive_authentication);
2761: dump_cfg_fmtint(sChallengeResponseAuthentication,
2762: o->challenge_response_authentication);
2763: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2764: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2765: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2766: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2767: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2768: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2769: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2770: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2771: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2772: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2773: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2774: dump_cfg_fmtint(sUseDNS, o->use_dns);
2775: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2776: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2777: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2778: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2779: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2780: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2781: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2782:
2783: /* string arguments */
2784: dump_cfg_string(sPidFile, o->pid_file);
2785: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.358 dtucker 2786: dump_cfg_string(sCiphers, o->ciphers);
2787: dump_cfg_string(sMacs, o->macs);
1.182 dtucker 2788: dump_cfg_string(sBanner, o->banner);
2789: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2790: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2791: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2792: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.355 djm 2793: dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
1.208 djm 2794: dump_cfg_string(sAuthorizedPrincipalsFile,
2795: o->authorized_principals_file);
1.261 dtucker 2796: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2797: ? "none" : o->version_addendum);
1.231 djm 2798: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2799: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2800: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2801: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2802: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.358 dtucker 2803: dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
2804: dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
2805: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types);
2806: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
2807: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.316 djm 2808: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2809:
2810: /* string arguments requiring a lookup */
2811: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2812: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2813:
2814: /* string array arguments */
1.219 djm 2815: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2816: o->authorized_keys_files);
1.182 dtucker 2817: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2818: o->host_key_files);
1.261 dtucker 2819: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2820: o->host_cert_files);
1.182 dtucker 2821: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2822: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2823: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2824: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2825: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.332 djm 2826: dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
1.232 djm 2827: dump_cfg_strarray_oneline(sAuthenticationMethods,
2828: o->num_auth_methods, o->auth_methods);
1.370 ! djm 2829: dump_cfg_strarray_oneline(sLogVerbose,
! 2830: o->num_log_verbose, o->log_verbose);
1.182 dtucker 2831:
2832: /* other arguments */
2833: for (i = 0; i < o->num_subsystems; i++)
2834: printf("subsystem %s %s\n", o->subsystem_name[i],
2835: o->subsystem_args[i]);
2836:
2837: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2838: o->max_startups_rate, o->max_startups);
2839:
1.318 djm 2840: s = NULL;
2841: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2842: if (tunmode_desc[i].val == o->permit_tun) {
2843: s = tunmode_desc[i].text;
2844: break;
2845: }
1.318 djm 2846: }
1.182 dtucker 2847: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2848:
1.214 stevesk 2849: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2850: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2851:
1.284 dtucker 2852: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2853: o->rekey_interval);
1.182 dtucker 2854:
1.310 djm 2855: printf("permitopen");
2856: if (o->num_permitted_opens == 0)
2857: printf(" any");
2858: else {
2859: for (i = 0; i < o->num_permitted_opens; i++)
2860: printf(" %s", o->permitted_opens[i]);
1.329 djm 2861: }
2862: printf("\n");
1.330 djm 2863: printf("permitlisten");
2864: if (o->num_permitted_listens == 0)
1.329 djm 2865: printf(" any");
2866: else {
1.330 djm 2867: for (i = 0; i < o->num_permitted_listens; i++)
2868: printf(" %s", o->permitted_listens[i]);
1.310 djm 2869: }
2870: printf("\n");
1.334 djm 2871:
1.367 djm 2872: if (o->permit_user_env_allowlist == NULL) {
1.334 djm 2873: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2874: } else {
2875: printf("permituserenvironment %s\n",
1.367 djm 2876: o->permit_user_env_allowlist);
1.334 djm 2877: }
2878:
1.354 djm 2879: printf("pubkeyauthoptions");
2880: if (o->pubkey_auth_options == 0)
2881: printf(" none");
2882: if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
2883: printf(" touch-required");
1.368 djm 2884: if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
2885: printf(" verify-required");
1.354 djm 2886: printf("\n");
1.1 deraadt 2887: }
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