Annotation of src/usr.bin/ssh/servconf.c, Revision 1.378
1.226 dtucker 1:
1.378 ! dtucker 2: /* $OpenBSD: servconf.c,v 1.377 2021/02/24 01:18:08 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;
1.375 dtucker 111: options->hostbased_accepted_algos = 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;
1.374 dtucker 115: options->pubkey_accepted_algos = NULL;
1.25 markus 116: options->kerberos_authentication = -1;
117: options->kerberos_or_local_passwd = -1;
118: options->kerberos_ticket_cleanup = -1;
1.130 jakob 119: options->kerberos_get_afs_token = -1;
1.125 markus 120: options->gss_authentication=-1;
121: options->gss_cleanup_creds = -1;
1.271 djm 122: options->gss_strict_acceptor = -1;
1.25 markus 123: options->password_authentication = -1;
1.52 markus 124: options->kbd_interactive_authentication = -1;
1.80 markus 125: options->challenge_response_authentication = -1;
1.25 markus 126: options->permit_empty_passwd = -1;
1.113 markus 127: options->permit_user_env = -1;
1.367 djm 128: options->permit_user_env_allowlist = NULL;
1.111 markus 129: options->compression = -1;
1.235 dtucker 130: options->rekey_limit = -1;
131: options->rekey_interval = -1;
1.53 markus 132: options->allow_tcp_forwarding = -1;
1.251 millert 133: options->allow_streamlocal_forwarding = -1;
1.178 pyr 134: options->allow_agent_forwarding = -1;
1.25 markus 135: options->num_allow_users = 0;
136: options->num_deny_users = 0;
137: options->num_allow_groups = 0;
138: options->num_deny_groups = 0;
1.33 markus 139: options->ciphers = NULL;
1.66 markus 140: options->macs = NULL;
1.211 djm 141: options->kex_algorithms = NULL;
1.341 djm 142: options->ca_sign_algorithms = NULL;
1.251 millert 143: options->fwd_opts.gateway_ports = -1;
144: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
145: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 146: options->num_subsystems = 0;
1.50 markus 147: options->max_startups_begin = -1;
148: options->max_startups_rate = -1;
1.46 markus 149: options->max_startups = -1;
1.372 dtucker 150: options->per_source_max_startups = -1;
151: options->per_source_masklen_ipv4 = -1;
152: options->per_source_masklen_ipv6 = -1;
1.133 dtucker 153: options->max_authtries = -1;
1.180 djm 154: options->max_sessions = -1;
1.57 markus 155: options->banner = NULL;
1.122 markus 156: options->use_dns = -1;
1.77 beck 157: options->client_alive_interval = -1;
158: options->client_alive_count_max = -1;
1.219 djm 159: options->num_authkeys_files = 0;
1.131 djm 160: options->num_accept_env = 0;
1.332 djm 161: options->num_setenv = 0;
1.145 reyk 162: options->permit_tun = -1;
1.310 djm 163: options->permitted_opens = NULL;
1.330 djm 164: options->permitted_listens = NULL;
1.158 dtucker 165: options->adm_forced_command = NULL;
1.176 djm 166: options->chroot_directory = NULL;
1.231 djm 167: options->authorized_keys_command = NULL;
168: options->authorized_keys_command_user = NULL;
1.204 djm 169: options->revoked_keys_file = NULL;
1.355 djm 170: options->sk_provider = NULL;
1.204 djm 171: options->trusted_user_ca_keys = NULL;
1.208 djm 172: options->authorized_principals_file = NULL;
1.270 djm 173: options->authorized_principals_command = NULL;
174: options->authorized_principals_command_user = NULL;
1.213 djm 175: options->ip_qos_interactive = -1;
176: options->ip_qos_bulk = -1;
1.225 djm 177: options->version_addendum = NULL;
1.256 djm 178: options->fingerprint_hash = -1;
1.301 djm 179: options->disable_forwarding = -1;
1.309 djm 180: options->expose_userauth_info = -1;
1.1 deraadt 181: }
182:
1.257 djm 183: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
184: static int
185: option_clear_or_none(const char *o)
186: {
187: return o == NULL || strcasecmp(o, "none") == 0;
188: }
189:
1.282 djm 190: static void
191: assemble_algorithms(ServerOptions *o)
192: {
1.341 djm 193: char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
1.358 dtucker 194: char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
1.340 djm 195: int r;
1.335 djm 196:
197: all_cipher = cipher_alg_list(',', 0);
198: all_mac = mac_alg_list(',');
199: all_kex = kex_alg_list(',');
200: all_key = sshkey_alg_list(0, 0, 1, ',');
1.341 djm 201: all_sig = sshkey_alg_list(0, 1, 1, ',');
1.358 dtucker 202: /* remove unsupported algos from default lists */
1.367 djm 203: def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
204: def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
205: def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
206: def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
207: def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
1.340 djm 208: #define ASSEMBLE(what, defaults, all) \
209: do { \
210: if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
1.371 djm 211: fatal_fr(r, "%s", #what); \
1.340 djm 212: } while (0)
1.358 dtucker 213: ASSEMBLE(ciphers, def_cipher, all_cipher);
214: ASSEMBLE(macs, def_mac, all_mac);
215: ASSEMBLE(kex_algorithms, def_kex, all_kex);
216: ASSEMBLE(hostkeyalgorithms, def_key, all_key);
1.375 dtucker 217: ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
1.374 dtucker 218: ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
1.358 dtucker 219: ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
1.340 djm 220: #undef ASSEMBLE
1.335 djm 221: free(all_cipher);
222: free(all_mac);
223: free(all_kex);
224: free(all_key);
1.341 djm 225: free(all_sig);
1.358 dtucker 226: free(def_cipher);
227: free(def_mac);
228: free(def_kex);
229: free(def_key);
230: free(def_sig);
1.282 djm 231: }
232:
1.314 djm 233: void
234: servconf_add_hostkey(const char *file, const int line,
1.344 djm 235: ServerOptions *options, const char *path, int userprovided)
1.314 djm 236: {
237: char *apath = derelativise_path(path);
238:
1.376 markus 239: opt_array_append2(file, line, "HostKey",
1.344 djm 240: &options->host_key_files, &options->host_key_file_userprovided,
241: &options->num_host_key_files, apath, userprovided);
1.314 djm 242: free(apath);
243: }
244:
245: void
246: servconf_add_hostcert(const char *file, const int line,
247: ServerOptions *options, const char *path)
248: {
249: char *apath = derelativise_path(path);
250:
1.376 markus 251: opt_array_append(file, line, "HostCertificate",
1.314 djm 252: &options->host_cert_files, &options->num_host_cert_files, apath);
253: free(apath);
254: }
255:
1.34 markus 256: void
1.25 markus 257: fill_default_server_options(ServerOptions *options)
1.1 deraadt 258: {
1.314 djm 259: u_int i;
1.257 djm 260:
1.54 markus 261: if (options->num_host_key_files == 0) {
1.293 naddy 262: /* fill default hostkeys */
1.314 djm 263: servconf_add_hostkey("[default]", 0, options,
1.344 djm 264: _PATH_HOST_RSA_KEY_FILE, 0);
1.314 djm 265: servconf_add_hostkey("[default]", 0, options,
1.344 djm 266: _PATH_HOST_ECDSA_KEY_FILE, 0);
1.314 djm 267: servconf_add_hostkey("[default]", 0, options,
1.344 djm 268: _PATH_HOST_ED25519_KEY_FILE, 0);
1.326 markus 269: #ifdef WITH_XMSS
1.325 markus 270: servconf_add_hostkey("[default]", 0, options,
1.344 djm 271: _PATH_HOST_XMSS_KEY_FILE, 0);
1.326 markus 272: #endif /* WITH_XMSS */
1.54 markus 273: }
1.203 djm 274: /* No certificates by default */
1.29 markus 275: if (options->num_ports == 0)
276: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 277: if (options->address_family == -1)
278: options->address_family = AF_UNSPEC;
1.29 markus 279: if (options->listen_addrs == NULL)
1.315 djm 280: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 281: if (options->pid_file == NULL)
1.257 djm 282: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.378 ! dtucker 283: if (options->moduli_file == NULL)
! 284: options->moduli_file = xstrdup(_PATH_DH_MODULI);
1.25 markus 285: if (options->login_grace_time == -1)
1.115 stevesk 286: options->login_grace_time = 120;
1.67 markus 287: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 288: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 289: if (options->ignore_rhosts == -1)
1.30 markus 290: options->ignore_rhosts = 1;
1.25 markus 291: if (options->ignore_user_known_hosts == -1)
292: options->ignore_user_known_hosts = 0;
293: if (options->print_motd == -1)
294: options->print_motd = 1;
1.72 stevesk 295: if (options->print_lastlog == -1)
296: options->print_lastlog = 1;
1.25 markus 297: if (options->x11_forwarding == -1)
1.30 markus 298: options->x11_forwarding = 0;
1.25 markus 299: if (options->x11_display_offset == -1)
1.30 markus 300: options->x11_display_offset = 10;
1.99 stevesk 301: if (options->x11_use_localhost == -1)
302: options->x11_use_localhost = 1;
1.42 markus 303: if (options->xauth_location == NULL)
1.257 djm 304: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 305: if (options->permit_tty == -1)
306: options->permit_tty = 1;
1.250 djm 307: if (options->permit_user_rc == -1)
308: options->permit_user_rc = 1;
1.25 markus 309: if (options->strict_modes == -1)
310: options->strict_modes = 1;
1.129 markus 311: if (options->tcp_keep_alive == -1)
312: options->tcp_keep_alive = 1;
1.101 markus 313: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 314: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 315: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 316: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 317: if (options->hostbased_authentication == -1)
318: options->hostbased_authentication = 0;
319: if (options->hostbased_uses_name_from_packet_only == -1)
320: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 321: if (options->pubkey_authentication == -1)
322: options->pubkey_authentication = 1;
1.354 djm 323: if (options->pubkey_auth_options == -1)
324: options->pubkey_auth_options = 0;
1.25 markus 325: if (options->kerberos_authentication == -1)
1.107 markus 326: options->kerberos_authentication = 0;
1.25 markus 327: if (options->kerberos_or_local_passwd == -1)
328: options->kerberos_or_local_passwd = 1;
329: if (options->kerberos_ticket_cleanup == -1)
330: options->kerberos_ticket_cleanup = 1;
1.130 jakob 331: if (options->kerberos_get_afs_token == -1)
332: options->kerberos_get_afs_token = 0;
1.125 markus 333: if (options->gss_authentication == -1)
334: options->gss_authentication = 0;
335: if (options->gss_cleanup_creds == -1)
336: options->gss_cleanup_creds = 1;
1.271 djm 337: if (options->gss_strict_acceptor == -1)
1.302 djm 338: options->gss_strict_acceptor = 1;
1.25 markus 339: if (options->password_authentication == -1)
340: options->password_authentication = 1;
1.52 markus 341: if (options->kbd_interactive_authentication == -1)
342: options->kbd_interactive_authentication = 0;
1.80 markus 343: if (options->challenge_response_authentication == -1)
344: options->challenge_response_authentication = 1;
1.25 markus 345: if (options->permit_empty_passwd == -1)
1.30 markus 346: options->permit_empty_passwd = 0;
1.334 djm 347: if (options->permit_user_env == -1) {
1.113 markus 348: options->permit_user_env = 0;
1.367 djm 349: options->permit_user_env_allowlist = NULL;
1.334 djm 350: }
1.111 markus 351: if (options->compression == -1)
1.359 dtucker 352: #ifdef WITH_ZLIB
1.337 sf 353: options->compression = COMP_DELAYED;
1.359 dtucker 354: #else
355: options->compression = COMP_NONE;
356: #endif
357:
1.235 dtucker 358: if (options->rekey_limit == -1)
359: options->rekey_limit = 0;
360: if (options->rekey_interval == -1)
361: options->rekey_interval = 0;
1.53 markus 362: if (options->allow_tcp_forwarding == -1)
1.233 djm 363: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 364: if (options->allow_streamlocal_forwarding == -1)
365: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 366: if (options->allow_agent_forwarding == -1)
367: options->allow_agent_forwarding = 1;
1.251 millert 368: if (options->fwd_opts.gateway_ports == -1)
369: options->fwd_opts.gateway_ports = 0;
1.46 markus 370: if (options->max_startups == -1)
1.234 dtucker 371: options->max_startups = 100;
1.50 markus 372: if (options->max_startups_rate == -1)
1.234 dtucker 373: options->max_startups_rate = 30; /* 30% */
1.50 markus 374: if (options->max_startups_begin == -1)
1.234 dtucker 375: options->max_startups_begin = 10;
1.372 dtucker 376: if (options->per_source_max_startups == -1)
377: options->per_source_max_startups = INT_MAX;
378: if (options->per_source_masklen_ipv4 == -1)
379: options->per_source_masklen_ipv4 = 32;
380: if (options->per_source_masklen_ipv6 == -1)
381: options->per_source_masklen_ipv6 = 128;
1.133 dtucker 382: if (options->max_authtries == -1)
383: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 384: if (options->max_sessions == -1)
385: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 386: if (options->use_dns == -1)
1.260 deraadt 387: options->use_dns = 0;
1.77 beck 388: if (options->client_alive_interval == -1)
1.95 deraadt 389: options->client_alive_interval = 0;
1.77 beck 390: if (options->client_alive_count_max == -1)
391: options->client_alive_count_max = 3;
1.219 djm 392: if (options->num_authkeys_files == 0) {
1.376 markus 393: opt_array_append("[default]", 0, "AuthorizedKeysFiles",
1.314 djm 394: &options->authorized_keys_files,
395: &options->num_authkeys_files,
396: _PATH_SSH_USER_PERMITTED_KEYS);
1.376 markus 397: opt_array_append("[default]", 0, "AuthorizedKeysFiles",
1.314 djm 398: &options->authorized_keys_files,
399: &options->num_authkeys_files,
400: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 401: }
1.145 reyk 402: if (options->permit_tun == -1)
1.146 reyk 403: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 404: if (options->ip_qos_interactive == -1)
1.327 job 405: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 406: if (options->ip_qos_bulk == -1)
1.327 job 407: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 408: if (options->version_addendum == NULL)
409: options->version_addendum = xstrdup("");
1.251 millert 410: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
411: options->fwd_opts.streamlocal_bind_mask = 0177;
412: if (options->fwd_opts.streamlocal_bind_unlink == -1)
413: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 414: if (options->fingerprint_hash == -1)
415: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 416: if (options->disable_forwarding == -1)
417: options->disable_forwarding = 0;
1.309 djm 418: if (options->expose_userauth_info == -1)
419: options->expose_userauth_info = 0;
1.355 djm 420: if (options->sk_provider == NULL)
421: options->sk_provider = xstrdup("internal");
1.277 djm 422:
1.282 djm 423: assemble_algorithms(options);
1.277 djm 424:
1.285 djm 425: /* Turn privilege separation and sandboxing on by default */
1.102 provos 426: if (use_privsep == -1)
1.285 djm 427: use_privsep = PRIVSEP_ON;
1.257 djm 428:
429: #define CLEAR_ON_NONE(v) \
430: do { \
431: if (option_clear_or_none(v)) { \
432: free(v); \
433: v = NULL; \
434: } \
435: } while(0)
436: CLEAR_ON_NONE(options->pid_file);
437: CLEAR_ON_NONE(options->xauth_location);
438: CLEAR_ON_NONE(options->banner);
439: CLEAR_ON_NONE(options->trusted_user_ca_keys);
440: CLEAR_ON_NONE(options->revoked_keys_file);
1.355 djm 441: CLEAR_ON_NONE(options->sk_provider);
1.267 djm 442: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 443: CLEAR_ON_NONE(options->adm_forced_command);
444: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 445: CLEAR_ON_NONE(options->routing_domain);
1.357 djm 446: CLEAR_ON_NONE(options->host_key_agent);
1.257 djm 447: for (i = 0; i < options->num_host_key_files; i++)
448: CLEAR_ON_NONE(options->host_key_files[i]);
449: for (i = 0; i < options->num_host_cert_files; i++)
450: CLEAR_ON_NONE(options->host_cert_files[i]);
451: #undef CLEAR_ON_NONE
1.291 djm 452:
453: /* Similar handling for AuthenticationMethods=any */
454: if (options->num_auth_methods == 1 &&
455: strcmp(options->auth_methods[0], "any") == 0) {
456: free(options->auth_methods[0]);
457: options->auth_methods[0] = NULL;
458: options->num_auth_methods = 0;
459: }
1.1 deraadt 460: }
461:
462: /* Keyword tokens. */
1.25 markus 463: typedef enum {
464: sBadOption, /* == unknown option */
1.293 naddy 465: sPort, sHostKeyFile, sLoginGraceTime,
1.370 djm 466: sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
1.25 markus 467: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 468: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 469: sPasswordAuthentication, sKbdInteractiveAuthentication,
470: sListenAddress, sAddressFamily,
1.72 stevesk 471: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 472: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 473: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 474: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 475: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.378 ! dtucker 476: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile, sModuliFile,
1.374 dtucker 477: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
1.258 djm 478: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 479: sBanner, sUseDNS, sHostbasedAuthentication,
1.375 dtucker 480: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
1.372 dtucker 481: sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
1.258 djm 482: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 483: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
1.332 djm 484: sAcceptEnv, sSetEnv, sPermitTunnel,
1.330 djm 485: sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
1.200 dtucker 486: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.360 djm 487: sHostCertificate, sInclude,
1.208 djm 488: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 489: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.341 djm 490: sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 491: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 492: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 493: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 494: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.355 djm 495: sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
1.295 djm 496: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 497: } ServerOpCodes;
498:
1.360 djm 499: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
500: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
501: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
502: #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
1.365 djm 503: #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
1.153 dtucker 504:
1.1 deraadt 505: /* Textual representation of the tokens. */
1.25 markus 506: static struct {
507: const char *name;
508: ServerOpCodes opcode;
1.153 dtucker 509: u_int flags;
1.25 markus 510: } keywords[] = {
1.153 dtucker 511: { "port", sPort, SSHCFG_GLOBAL },
512: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
513: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 514: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 515: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.378 ! dtucker 516: { "modulifile", sModuliFile, SSHCFG_GLOBAL },
1.293 naddy 517: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 518: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 519: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 520: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 521: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 522: { "loglevel", sLogLevel, SSHCFG_ALL },
1.370 djm 523: { "logverbose", sLogVerbose, SSHCFG_ALL },
1.153 dtucker 524: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 525: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 526: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 527: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.377 dtucker 528: { "hostbasedacceptedalgorithms", sHostbasedAcceptedAlgorithms, SSHCFG_ALL },
1.375 dtucker 529: { "hostbasedacceptedkeytypes", sHostbasedAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
1.276 markus 530: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 531: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 532: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.377 dtucker 533: { "pubkeyacceptedalgorithms", sPubkeyAcceptedAlgorithms, SSHCFG_ALL },
1.374 dtucker 534: { "pubkeyacceptedkeytypes", sPubkeyAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
1.354 djm 535: { "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
1.153 dtucker 536: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 537: #ifdef KRB5
1.168 dtucker 538: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 539: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
540: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
541: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 542: #else
1.168 dtucker 543: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 544: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
545: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
546: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 547: #endif
1.153 dtucker 548: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
549: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 550: #ifdef GSSAPI
1.168 dtucker 551: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 552: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 553: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 554: #else
1.168 dtucker 555: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 556: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 557: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 558: #endif
1.168 dtucker 559: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
560: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 561: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 562: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
563: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
564: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
565: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
566: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
567: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
1.362 djm 568: { "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
1.153 dtucker 569: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 570: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
571: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
572: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 573: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
574: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 575: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 576: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 577: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 578: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 579: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 580: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
581: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
582: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 583: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 584: { "allowusers", sAllowUsers, SSHCFG_ALL },
585: { "denyusers", sDenyUsers, SSHCFG_ALL },
586: { "allowgroups", sAllowGroups, SSHCFG_ALL },
587: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 588: { "ciphers", sCiphers, SSHCFG_GLOBAL },
589: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 590: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 591: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
592: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
593: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.372 dtucker 594: { "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
595: { "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
1.184 dtucker 596: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 597: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 598: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 599: { "usedns", sUseDNS, SSHCFG_GLOBAL },
600: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
601: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 602: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
603: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 604: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 605: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 606: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 607: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.332 djm 608: { "setenv", sSetEnv, SSHCFG_ALL },
1.209 djm 609: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 610: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 611: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 612: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 613: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.330 djm 614: { "permitlisten", sPermitListen, SSHCFG_ALL },
1.158 dtucker 615: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 616: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 617: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 618: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
619: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 620: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 621: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.360 djm 622: { "include", sInclude, SSHCFG_ALL },
1.213 djm 623: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 624: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
625: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 626: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
627: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 628: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 629: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 630: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
631: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
632: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 633: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 634: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 635: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 636: { "rdomain", sRDomain, SSHCFG_ALL },
1.342 djm 637: { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
1.355 djm 638: { "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
1.153 dtucker 639: { NULL, sBadOption, 0 }
1.1 deraadt 640: };
641:
1.182 dtucker 642: static struct {
643: int val;
644: char *text;
645: } tunmode_desc[] = {
646: { SSH_TUNMODE_NO, "no" },
647: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
648: { SSH_TUNMODE_ETHERNET, "ethernet" },
649: { SSH_TUNMODE_YES, "yes" },
650: { -1, NULL }
651: };
652:
1.329 djm 653: /* Returns an opcode name from its number */
654:
655: static const char *
656: lookup_opcode_name(ServerOpCodes code)
657: {
658: u_int i;
659:
660: for (i = 0; keywords[i].name != NULL; i++)
661: if (keywords[i].opcode == code)
662: return(keywords[i].name);
663: return "UNKNOWN";
664: }
665:
666:
1.27 markus 667: /*
1.73 stevesk 668: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 669: */
1.1 deraadt 670:
1.34 markus 671: static ServerOpCodes
1.25 markus 672: parse_token(const char *cp, const char *filename,
1.153 dtucker 673: int linenum, u_int *flags)
1.1 deraadt 674: {
1.55 markus 675: u_int i;
1.1 deraadt 676:
1.25 markus 677: for (i = 0; keywords[i].name; i++)
1.153 dtucker 678: if (strcasecmp(cp, keywords[i].name) == 0) {
679: *flags = keywords[i].flags;
1.25 markus 680: return keywords[i].opcode;
1.153 dtucker 681: }
1.25 markus 682:
1.78 stevesk 683: error("%s: line %d: Bad configuration option: %s",
684: filename, linenum, cp);
1.25 markus 685: return sBadOption;
1.1 deraadt 686: }
687:
1.202 djm 688: char *
689: derelativise_path(const char *path)
690: {
1.259 deraadt 691: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 692:
1.257 djm 693: if (strcasecmp(path, "none") == 0)
694: return xstrdup("none");
1.202 djm 695: expanded = tilde_expand_filename(path, getuid());
1.343 djm 696: if (path_absolute(expanded))
1.202 djm 697: return expanded;
1.207 djm 698: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.371 djm 699: fatal_f("getcwd: %s", strerror(errno));
1.202 djm 700: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 701: free(expanded);
1.202 djm 702: return ret;
703: }
704:
1.84 itojun 705: static void
1.315 djm 706: add_listen_addr(ServerOptions *options, const char *addr,
707: const char *rdomain, int port)
1.74 stevesk 708: {
1.142 djm 709: u_int i;
1.74 stevesk 710:
1.315 djm 711: if (port > 0)
712: add_one_listen_addr(options, addr, rdomain, port);
713: else {
714: for (i = 0; i < options->num_ports; i++) {
715: add_one_listen_addr(options, addr, rdomain,
716: options->ports[i]);
717: }
718: }
1.74 stevesk 719: }
720:
1.84 itojun 721: static void
1.315 djm 722: add_one_listen_addr(ServerOptions *options, const char *addr,
723: const char *rdomain, int port)
1.29 markus 724: {
725: struct addrinfo hints, *ai, *aitop;
726: char strport[NI_MAXSERV];
727: int gaierr;
1.315 djm 728: u_int i;
729:
730: /* Find listen_addrs entry for this rdomain */
731: for (i = 0; i < options->num_listen_addrs; i++) {
732: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
733: break;
734: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
735: continue;
736: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
737: break;
738: }
739: if (i >= options->num_listen_addrs) {
740: /* No entry for this rdomain; allocate one */
741: if (i >= INT_MAX)
1.371 djm 742: fatal_f("too many listen addresses");
1.315 djm 743: options->listen_addrs = xrecallocarray(options->listen_addrs,
744: options->num_listen_addrs, options->num_listen_addrs + 1,
745: sizeof(*options->listen_addrs));
746: i = options->num_listen_addrs++;
747: if (rdomain != NULL)
748: options->listen_addrs[i].rdomain = xstrdup(rdomain);
749: }
750: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 751:
1.74 stevesk 752: memset(&hints, 0, sizeof(hints));
1.138 djm 753: hints.ai_family = options->address_family;
1.74 stevesk 754: hints.ai_socktype = SOCK_STREAM;
755: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 756: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 757: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
758: fatal("bad addr or host: %s (%s)",
759: addr ? addr : "<NULL>",
1.173 dtucker 760: ssh_gai_strerror(gaierr));
1.74 stevesk 761: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
762: ;
1.315 djm 763: ai->ai_next = options->listen_addrs[i].addrs;
764: options->listen_addrs[i].addrs = aitop;
765: }
766:
767: /* Returns nonzero if the routing domain name is valid */
768: static int
769: valid_rdomain(const char *name)
770: {
771: const char *errstr;
772: long long num;
773: struct rt_tableinfo info;
774: int mib[6];
775: size_t miblen = sizeof(mib);
776:
777: if (name == NULL)
778: return 1;
779:
780: num = strtonum(name, 0, 255, &errstr);
781: if (errstr != NULL)
782: return 0;
783:
784: /* Check whether the table actually exists */
785: memset(mib, 0, sizeof(mib));
786: mib[0] = CTL_NET;
787: mib[1] = PF_ROUTE;
788: mib[4] = NET_RT_TABLE;
789: mib[5] = (int)num;
790: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
791: return 0;
792:
793: return 1;
1.29 markus 794: }
795:
1.266 dtucker 796: /*
797: * Queue a ListenAddress to be processed once we have all of the Ports
798: * and AddressFamily options.
799: */
800: static void
1.315 djm 801: queue_listen_addr(ServerOptions *options, const char *addr,
802: const char *rdomain, int port)
1.266 dtucker 803: {
1.315 djm 804: struct queued_listenaddr *qla;
805:
806: options->queued_listen_addrs = xrecallocarray(
807: options->queued_listen_addrs,
808: options->num_queued_listens, options->num_queued_listens + 1,
809: sizeof(*options->queued_listen_addrs));
810: qla = &options->queued_listen_addrs[options->num_queued_listens++];
811: qla->addr = xstrdup(addr);
812: qla->port = port;
813: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 814: }
815:
816: /*
817: * Process queued (text) ListenAddress entries.
818: */
819: static void
820: process_queued_listen_addrs(ServerOptions *options)
821: {
822: u_int i;
1.315 djm 823: struct queued_listenaddr *qla;
1.266 dtucker 824:
825: if (options->num_ports == 0)
826: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
827: if (options->address_family == -1)
828: options->address_family = AF_UNSPEC;
829:
830: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 831: qla = &options->queued_listen_addrs[i];
832: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
833: free(qla->addr);
834: free(qla->rdomain);
1.266 dtucker 835: }
836: free(options->queued_listen_addrs);
837: options->queued_listen_addrs = NULL;
838: options->num_queued_listens = 0;
839: }
840:
1.310 djm 841: /*
1.329 djm 842: * Inform channels layer of permitopen options for a single forwarding
843: * direction (local/remote).
1.310 djm 844: */
1.329 djm 845: static void
846: process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
847: char **opens, u_int num_opens)
1.310 djm 848: {
849: u_int i;
850: int port;
1.347 dtucker 851: char *host, *arg, *oarg, ch;
1.329 djm 852: int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
853: const char *what = lookup_opcode_name(opcode);
1.310 djm 854:
1.329 djm 855: channel_clear_permission(ssh, FORWARD_ADM, where);
856: if (num_opens == 0)
1.310 djm 857: return; /* permit any */
858:
859: /* handle keywords: "any" / "none" */
1.329 djm 860: if (num_opens == 1 && strcmp(opens[0], "any") == 0)
1.310 djm 861: return;
1.329 djm 862: if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
863: channel_disable_admin(ssh, where);
1.310 djm 864: return;
865: }
866: /* Otherwise treat it as a list of permitted host:port */
1.329 djm 867: for (i = 0; i < num_opens; i++) {
868: oarg = arg = xstrdup(opens[i]);
1.348 dtucker 869: ch = '\0';
1.347 dtucker 870: host = hpdelim2(&arg, &ch);
871: if (host == NULL || ch == '/')
1.371 djm 872: fatal_f("missing host in %s", what);
1.310 djm 873: host = cleanhostname(host);
874: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.371 djm 875: fatal_f("bad port number in %s", what);
1.310 djm 876: /* Send it to channels layer */
1.329 djm 877: channel_add_permission(ssh, FORWARD_ADM,
878: where, host, port);
1.310 djm 879: free(oarg);
880: }
881: }
882:
1.329 djm 883: /*
884: * Inform channels layer of permitopen options from configuration.
885: */
886: void
887: process_permitopen(struct ssh *ssh, ServerOptions *options)
888: {
889: process_permitopen_list(ssh, sPermitOpen,
890: options->permitted_opens, options->num_permitted_opens);
1.330 djm 891: process_permitopen_list(ssh, sPermitListen,
892: options->permitted_listens,
893: options->num_permitted_listens);
1.329 djm 894: }
895:
1.226 dtucker 896: struct connection_info *
1.346 djm 897: get_connection_info(struct ssh *ssh, int populate, int use_dns)
1.226 dtucker 898: {
899: static struct connection_info ci;
900:
1.346 djm 901: if (ssh == NULL || !populate)
1.226 dtucker 902: return &ci;
1.286 djm 903: ci.host = auth_get_canonical_hostname(ssh, use_dns);
904: ci.address = ssh_remote_ipaddr(ssh);
905: ci.laddress = ssh_local_ipaddr(ssh);
906: ci.lport = ssh_local_port(ssh);
1.317 djm 907: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 908: return &ci;
909: }
910:
1.153 dtucker 911: /*
912: * The strategy for the Match blocks is that the config file is parsed twice.
913: *
914: * The first time is at startup. activep is initialized to 1 and the
915: * directives in the global context are processed and acted on. Hitting a
916: * Match directive unsets activep and the directives inside the block are
917: * checked for syntax only.
918: *
919: * The second time is after a connection has been established but before
920: * authentication. activep is initialized to 2 and global config directives
921: * are ignored since they have already been processed. If the criteria in a
922: * Match block is met, activep is set and the subsequent directives
923: * processed and actioned until EOF or another Match block unsets it. Any
924: * options set are copied into the main server config.
925: *
926: * Potential additions/improvements:
1.295 djm 927: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 928: *
929: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
930: * Match Address 192.168.0.*
931: * Tag trusted
932: * Match Group wheel
933: * Tag trusted
934: * Match Tag trusted
935: * AllowTcpForwarding yes
936: * GatewayPorts clientspecified
937: * [...]
938: *
939: * - Add a PermittedChannelRequests directive
940: * Match Group shell
941: * PermittedChannelRequests session,forwarded-tcpip
942: */
943:
944: static int
1.165 dtucker 945: match_cfg_line_group(const char *grps, int line, const char *user)
946: {
947: int result = 0;
948: struct passwd *pw;
949:
950: if (user == NULL)
951: goto out;
952:
953: if ((pw = getpwnam(user)) == NULL) {
954: debug("Can't match group at line %d because user %.100s does "
955: "not exist", line, user);
956: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
957: debug("Can't Match group because user %.100s not in any group "
958: "at line %d", user, line);
1.186 djm 959: } else if (ga_match_pattern_list(grps) != 1) {
960: debug("user %.100s does not match group list %.100s at line %d",
961: user, grps, line);
1.165 dtucker 962: } else {
1.186 djm 963: debug("user %.100s matched group list %.100s at line %d", user,
964: grps, line);
1.165 dtucker 965: result = 1;
966: }
967: out:
968: ga_free();
969: return result;
970: }
971:
1.319 dtucker 972: static void
973: match_test_missing_fatal(const char *criteria, const char *attrib)
974: {
975: fatal("'Match %s' in configuration but '%s' not in connection "
976: "test specification.", criteria, attrib);
977: }
978:
1.226 dtucker 979: /*
1.230 dtucker 980: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 981: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 982: * not match.
1.226 dtucker 983: */
1.165 dtucker 984: static int
1.226 dtucker 985: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 986: {
1.243 dtucker 987: int result = 1, attributes = 0, port;
1.153 dtucker 988: char *arg, *attrib, *cp = *condition;
989:
1.226 dtucker 990: if (ci == NULL)
1.153 dtucker 991: debug3("checking syntax for 'Match %s'", cp);
992: else
1.226 dtucker 993: debug3("checking match for '%s' user %s host %s addr %s "
994: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
995: ci->host ? ci->host : "(null)",
996: ci->address ? ci->address : "(null)",
997: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 998:
999: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 1000: attributes++;
1001: if (strcasecmp(attrib, "all") == 0) {
1002: if (attributes != 1 ||
1003: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1004: error("'all' cannot be combined with other "
1005: "Match attributes");
1006: return -1;
1007: }
1008: *condition = cp;
1009: return 1;
1010: }
1.153 dtucker 1011: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
1012: error("Missing Match criteria for %s", attrib);
1013: return -1;
1014: }
1015: if (strcasecmp(attrib, "user") == 0) {
1.351 dtucker 1016: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.153 dtucker 1017: result = 0;
1018: continue;
1019: }
1.319 dtucker 1020: if (ci->user == NULL)
1021: match_test_missing_fatal("User", "user");
1.349 dtucker 1022: if (match_usergroup_pattern_list(ci->user, arg) != 1)
1.153 dtucker 1023: result = 0;
1024: else
1025: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 1026: "line %d", ci->user, arg, line);
1.165 dtucker 1027: } else if (strcasecmp(attrib, "group") == 0) {
1.351 dtucker 1028: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.226 dtucker 1029: result = 0;
1030: continue;
1031: }
1.319 dtucker 1032: if (ci->user == NULL)
1033: match_test_missing_fatal("Group", "user");
1.226 dtucker 1034: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 1035: case -1:
1036: return -1;
1037: case 0:
1038: result = 0;
1039: }
1.153 dtucker 1040: } else if (strcasecmp(attrib, "host") == 0) {
1.351 dtucker 1041: if (ci == NULL || (ci->test && ci->host == NULL)) {
1.153 dtucker 1042: result = 0;
1043: continue;
1044: }
1.319 dtucker 1045: if (ci->host == NULL)
1046: match_test_missing_fatal("Host", "host");
1.269 djm 1047: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 1048: result = 0;
1049: else
1050: debug("connection from %.100s matched 'Host "
1.226 dtucker 1051: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 1052: } else if (strcasecmp(attrib, "address") == 0) {
1.351 dtucker 1053: if (ci == NULL || (ci->test && ci->address == NULL)) {
1.369 dtucker 1054: if (addr_match_list(NULL, arg) != 0)
1055: fatal("Invalid Match address argument "
1056: "'%s' at line %d", arg, line);
1.226 dtucker 1057: result = 0;
1058: continue;
1059: }
1.319 dtucker 1060: if (ci->address == NULL)
1061: match_test_missing_fatal("Address", "addr");
1.226 dtucker 1062: switch (addr_match_list(ci->address, arg)) {
1.181 djm 1063: case 1:
1064: debug("connection from %.100s matched 'Address "
1.226 dtucker 1065: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 1066: break;
1067: case 0:
1.183 djm 1068: case -1:
1.153 dtucker 1069: result = 0;
1.181 djm 1070: break;
1.183 djm 1071: case -2:
1.181 djm 1072: return -1;
1.153 dtucker 1073: }
1.226 dtucker 1074: } else if (strcasecmp(attrib, "localaddress") == 0){
1.351 dtucker 1075: if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1.369 dtucker 1076: if (addr_match_list(NULL, arg) != 0)
1077: fatal("Invalid Match localaddress "
1078: "argument '%s' at line %d", arg,
1079: line);
1.226 dtucker 1080: result = 0;
1081: continue;
1082: }
1.319 dtucker 1083: if (ci->laddress == NULL)
1084: match_test_missing_fatal("LocalAddress",
1085: "laddr");
1.226 dtucker 1086: switch (addr_match_list(ci->laddress, arg)) {
1087: case 1:
1088: debug("connection from %.100s matched "
1089: "'LocalAddress %.100s' at line %d",
1090: ci->laddress, arg, line);
1091: break;
1092: case 0:
1093: case -1:
1094: result = 0;
1095: break;
1096: case -2:
1097: return -1;
1098: }
1099: } else if (strcasecmp(attrib, "localport") == 0) {
1100: if ((port = a2port(arg)) == -1) {
1101: error("Invalid LocalPort '%s' on Match line",
1102: arg);
1103: return -1;
1104: }
1.351 dtucker 1105: if (ci == NULL || (ci->test && ci->lport == -1)) {
1.226 dtucker 1106: result = 0;
1107: continue;
1108: }
1.319 dtucker 1109: if (ci->lport == 0)
1110: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1111: /* TODO support port lists */
1112: if (port == ci->lport)
1113: debug("connection from %.100s matched "
1114: "'LocalPort %d' at line %d",
1115: ci->laddress, port, line);
1116: else
1117: result = 0;
1.317 djm 1118: } else if (strcasecmp(attrib, "rdomain") == 0) {
1.351 dtucker 1119: if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1.317 djm 1120: result = 0;
1121: continue;
1122: }
1.351 dtucker 1123: if (ci->rdomain == NULL)
1124: match_test_missing_fatal("RDomain", "rdomain");
1.317 djm 1125: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1126: result = 0;
1127: else
1128: debug("user %.100s matched 'RDomain %.100s' at "
1129: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1130: } else {
1131: error("Unsupported Match attribute %s", attrib);
1132: return -1;
1133: }
1.243 dtucker 1134: }
1135: if (attributes == 0) {
1136: error("One or more attributes required for Match");
1137: return -1;
1.153 dtucker 1138: }
1.226 dtucker 1139: if (ci != NULL)
1.153 dtucker 1140: debug3("match %sfound", result ? "" : "not ");
1141: *condition = cp;
1142: return result;
1143: }
1144:
1.158 dtucker 1145: #define WHITESPACE " \t\r\n"
1146:
1.220 djm 1147: /* Multistate option parsing */
1148: struct multistate {
1149: char *key;
1150: int value;
1151: };
1.320 djm 1152: static const struct multistate multistate_flag[] = {
1153: { "yes", 1 },
1154: { "no", 0 },
1155: { NULL, -1 }
1156: };
1.363 djm 1157: static const struct multistate multistate_ignore_rhosts[] = {
1158: { "yes", IGNORE_RHOSTS_YES },
1159: { "no", IGNORE_RHOSTS_NO },
1160: { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1161: { NULL, -1 }
1162: };
1.220 djm 1163: static const struct multistate multistate_addressfamily[] = {
1164: { "inet", AF_INET },
1165: { "inet6", AF_INET6 },
1166: { "any", AF_UNSPEC },
1167: { NULL, -1 }
1168: };
1169: static const struct multistate multistate_permitrootlogin[] = {
1170: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1171: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1172: { "forced-commands-only", PERMIT_FORCED_ONLY },
1173: { "yes", PERMIT_YES },
1174: { "no", PERMIT_NO },
1175: { NULL, -1 }
1176: };
1177: static const struct multistate multistate_compression[] = {
1.359 dtucker 1178: #ifdef WITH_ZLIB
1.337 sf 1179: { "yes", COMP_DELAYED },
1180: { "delayed", COMP_DELAYED },
1.359 dtucker 1181: #endif
1.220 djm 1182: { "no", COMP_NONE },
1183: { NULL, -1 }
1184: };
1185: static const struct multistate multistate_gatewayports[] = {
1186: { "clientspecified", 2 },
1187: { "yes", 1 },
1188: { "no", 0 },
1.222 djm 1189: { NULL, -1 }
1190: };
1.233 djm 1191: static const struct multistate multistate_tcpfwd[] = {
1192: { "yes", FORWARD_ALLOW },
1193: { "all", FORWARD_ALLOW },
1194: { "no", FORWARD_DENY },
1195: { "remote", FORWARD_REMOTE },
1196: { "local", FORWARD_LOCAL },
1197: { NULL, -1 }
1198: };
1.220 djm 1199:
1.360 djm 1200: static int
1201: process_server_config_line_depth(ServerOptions *options, char *line,
1.226 dtucker 1202: const char *filename, int linenum, int *activep,
1.365 djm 1203: struct connection_info *connectinfo, int *inc_flags, int depth,
1.360 djm 1204: struct include_list *includes)
1.1 deraadt 1205: {
1.348 dtucker 1206: char ch, *cp, ***chararrayptr, **charptr, *arg, *arg2, *p;
1.360 djm 1207: int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1.174 dtucker 1208: SyslogFacility *log_facility_ptr;
1209: LogLevel *log_level_ptr;
1.25 markus 1210: ServerOpCodes opcode;
1.329 djm 1211: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1212: size_t len;
1.237 dtucker 1213: long long val64;
1.220 djm 1214: const struct multistate *multistate_ptr;
1.322 dtucker 1215: const char *errstr;
1.360 djm 1216: struct include_item *item;
1217: glob_t gbuf;
1.303 djm 1218:
1219: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1220: if ((len = strlen(line)) == 0)
1221: return 0;
1222: for (len--; len > 0; len--) {
1223: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1224: break;
1225: line[len] = '\0';
1226: }
1.25 markus 1227:
1.94 markus 1228: cp = line;
1.148 dtucker 1229: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1230: return 0;
1.94 markus 1231: /* Ignore leading whitespace */
1232: if (*arg == '\0')
1233: arg = strdelim(&cp);
1234: if (!arg || !*arg || *arg == '#')
1235: return 0;
1236: intptr = NULL;
1237: charptr = NULL;
1.153 dtucker 1238: opcode = parse_token(arg, filename, linenum, &flags);
1239:
1240: if (activep == NULL) { /* We are processing a command line directive */
1241: cmdline = 1;
1242: activep = &cmdline;
1243: }
1.360 djm 1244: if (*activep && opcode != sMatch && opcode != sInclude)
1.153 dtucker 1245: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1246: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1247: if (connectinfo == NULL) {
1.153 dtucker 1248: fatal("%s line %d: Directive '%s' is not allowed "
1249: "within a Match block", filename, linenum, arg);
1250: } else { /* this is a directive we have already processed */
1251: while (arg)
1252: arg = strdelim(&cp);
1253: return 0;
1254: }
1255: }
1256:
1.94 markus 1257: switch (opcode) {
1258: case sBadOption:
1259: return -1;
1260: case sPort:
1261: /* ignore ports from configfile if cmdline specifies ports */
1262: if (options->ports_from_cmdline)
1263: return 0;
1264: if (options->num_ports >= MAX_PORTS)
1265: fatal("%s line %d: too many ports.",
1266: filename, linenum);
1.48 provos 1267: arg = strdelim(&cp);
1.94 markus 1268: if (!arg || *arg == '\0')
1269: fatal("%s line %d: missing port number.",
1270: filename, linenum);
1271: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1272: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1273: fatal("%s line %d: Badly formatted port number.",
1274: filename, linenum);
1275: break;
1.29 markus 1276:
1.94 markus 1277: case sLoginGraceTime:
1278: intptr = &options->login_grace_time;
1.180 djm 1279: parse_time:
1.94 markus 1280: arg = strdelim(&cp);
1281: if (!arg || *arg == '\0')
1282: fatal("%s line %d: missing time value.",
1283: filename, linenum);
1284: if ((value = convtime(arg)) == -1)
1285: fatal("%s line %d: invalid time value.",
1286: filename, linenum);
1.268 djm 1287: if (*activep && *intptr == -1)
1.94 markus 1288: *intptr = value;
1289: break;
1290:
1291: case sListenAddress:
1292: arg = strdelim(&cp);
1.139 djm 1293: if (arg == NULL || *arg == '\0')
1294: fatal("%s line %d: missing address",
1.94 markus 1295: filename, linenum);
1.144 dtucker 1296: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1297: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1298: && strchr(p+1, ':') != NULL) {
1.315 djm 1299: port = 0;
1300: p = arg;
1301: } else {
1.347 dtucker 1302: arg2 = NULL;
1.348 dtucker 1303: ch = '\0';
1.347 dtucker 1304: p = hpdelim2(&arg, &ch);
1305: if (p == NULL || ch == '/')
1.315 djm 1306: fatal("%s line %d: bad address:port usage",
1307: filename, linenum);
1308: p = cleanhostname(p);
1309: if (arg == NULL)
1310: port = 0;
1311: else if ((port = a2port(arg)) <= 0)
1312: fatal("%s line %d: bad port number",
1313: filename, linenum);
1314: }
1315: /* Optional routing table */
1316: arg2 = NULL;
1317: if ((arg = strdelim(&cp)) != NULL) {
1318: if (strcmp(arg, "rdomain") != 0 ||
1319: (arg2 = strdelim(&cp)) == NULL)
1320: fatal("%s line %d: bad ListenAddress syntax",
1321: filename, linenum);
1322: if (!valid_rdomain(arg2))
1323: fatal("%s line %d: bad routing domain",
1324: filename, linenum);
1.144 dtucker 1325: }
1.139 djm 1326:
1.315 djm 1327: queue_listen_addr(options, p, arg2, port);
1.25 markus 1328:
1.138 djm 1329: break;
1330:
1331: case sAddressFamily:
1.220 djm 1332: intptr = &options->address_family;
1333: multistate_ptr = multistate_addressfamily;
1334: parse_multistate:
1.138 djm 1335: arg = strdelim(&cp);
1.141 markus 1336: if (!arg || *arg == '\0')
1.220 djm 1337: fatal("%s line %d: missing argument.",
1.141 markus 1338: filename, linenum);
1.220 djm 1339: value = -1;
1340: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1341: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1342: value = multistate_ptr[i].value;
1343: break;
1344: }
1345: }
1346: if (value == -1)
1347: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1348: filename, linenum, arg);
1.220 djm 1349: if (*activep && *intptr == -1)
1.138 djm 1350: *intptr = value;
1.94 markus 1351: break;
1352:
1353: case sHostKeyFile:
1354: arg = strdelim(&cp);
1355: if (!arg || *arg == '\0')
1356: fatal("%s line %d: missing file name.",
1357: filename, linenum);
1.344 djm 1358: if (*activep) {
1359: servconf_add_hostkey(filename, linenum,
1360: options, arg, 1);
1361: }
1.94 markus 1362: break;
1.76 stevesk 1363:
1.240 markus 1364: case sHostKeyAgent:
1365: charptr = &options->host_key_agent;
1366: arg = strdelim(&cp);
1367: if (!arg || *arg == '\0')
1368: fatal("%s line %d: missing socket name.",
1369: filename, linenum);
1370: if (*activep && *charptr == NULL)
1371: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1372: xstrdup(arg) : derelativise_path(arg);
1373: break;
1374:
1.203 djm 1375: case sHostCertificate:
1.314 djm 1376: arg = strdelim(&cp);
1377: if (!arg || *arg == '\0')
1378: fatal("%s line %d: missing file name.",
1379: filename, linenum);
1380: if (*activep)
1381: servconf_add_hostcert(filename, linenum, options, arg);
1382: break;
1.203 djm 1383:
1.94 markus 1384: case sPidFile:
1385: charptr = &options->pid_file;
1.314 djm 1386: parse_filename:
1387: arg = strdelim(&cp);
1388: if (!arg || *arg == '\0')
1389: fatal("%s line %d: missing file name.",
1390: filename, linenum);
1391: if (*activep && *charptr == NULL) {
1392: *charptr = derelativise_path(arg);
1393: /* increase optional counter */
1394: if (intptr != NULL)
1395: *intptr = *intptr + 1;
1396: }
1397: break;
1.25 markus 1398:
1.378 ! dtucker 1399: case sModuliFile:
! 1400: charptr = &options->moduli_file;
! 1401: goto parse_filename;
! 1402:
1.94 markus 1403: case sPermitRootLogin:
1404: intptr = &options->permit_root_login;
1.220 djm 1405: multistate_ptr = multistate_permitrootlogin;
1406: goto parse_multistate;
1.36 markus 1407:
1.94 markus 1408: case sIgnoreRhosts:
1409: intptr = &options->ignore_rhosts;
1.363 djm 1410: multistate_ptr = multistate_ignore_rhosts;
1.320 djm 1411: goto parse_multistate;
1.94 markus 1412:
1413: case sIgnoreUserKnownHosts:
1414: intptr = &options->ignore_user_known_hosts;
1.363 djm 1415: parse_flag:
1416: multistate_ptr = multistate_flag;
1417: goto parse_multistate;
1.94 markus 1418:
1419: case sHostbasedAuthentication:
1420: intptr = &options->hostbased_authentication;
1421: goto parse_flag;
1422:
1423: case sHostbasedUsesNameFromPacketOnly:
1424: intptr = &options->hostbased_uses_name_from_packet_only;
1425: goto parse_flag;
1426:
1.375 dtucker 1427: case sHostbasedAcceptedAlgorithms:
1428: charptr = &options->hostbased_accepted_algos;
1.374 dtucker 1429: parse_pubkey_algos:
1.258 djm 1430: arg = strdelim(&cp);
1431: if (!arg || *arg == '\0')
1432: fatal("%s line %d: Missing argument.",
1433: filename, linenum);
1.304 djm 1434: if (*arg != '-' &&
1.352 naddy 1435: !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1436: arg + 1 : arg, 1))
1.258 djm 1437: fatal("%s line %d: Bad key types '%s'.",
1438: filename, linenum, arg ? arg : "<NONE>");
1439: if (*activep && *charptr == NULL)
1440: *charptr = xstrdup(arg);
1441: break;
1442:
1.276 markus 1443: case sHostKeyAlgorithms:
1444: charptr = &options->hostkeyalgorithms;
1.374 dtucker 1445: goto parse_pubkey_algos;
1.276 markus 1446:
1.341 djm 1447: case sCASignatureAlgorithms:
1448: charptr = &options->ca_sign_algorithms;
1.374 dtucker 1449: goto parse_pubkey_algos;
1.341 djm 1450:
1.94 markus 1451: case sPubkeyAuthentication:
1452: intptr = &options->pubkey_authentication;
1453: goto parse_flag;
1.119 jakob 1454:
1.374 dtucker 1455: case sPubkeyAcceptedAlgorithms:
1456: charptr = &options->pubkey_accepted_algos;
1457: goto parse_pubkey_algos;
1.258 djm 1458:
1.354 djm 1459: case sPubkeyAuthOptions:
1460: intptr = &options->pubkey_auth_options;
1461: value = 0;
1462: while ((arg = strdelim(&cp)) && *arg != '\0') {
1463: if (strcasecmp(arg, "none") == 0)
1464: continue;
1465: if (strcasecmp(arg, "touch-required") == 0)
1466: value |= PUBKEYAUTH_TOUCH_REQUIRED;
1.368 djm 1467: else if (strcasecmp(arg, "verify-required") == 0)
1468: value |= PUBKEYAUTH_VERIFY_REQUIRED;
1.354 djm 1469: else {
1470: fatal("%s line %d: unsupported "
1471: "PubkeyAuthOptions option %s",
1472: filename, linenum, arg);
1473: }
1474: }
1475: if (*activep && *intptr == -1)
1476: *intptr = value;
1477: break;
1478:
1.94 markus 1479: case sKerberosAuthentication:
1480: intptr = &options->kerberos_authentication;
1481: goto parse_flag;
1482:
1483: case sKerberosOrLocalPasswd:
1484: intptr = &options->kerberos_or_local_passwd;
1485: goto parse_flag;
1486:
1487: case sKerberosTicketCleanup:
1488: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1489: goto parse_flag;
1490:
1491: case sKerberosGetAFSToken:
1492: intptr = &options->kerberos_get_afs_token;
1.125 markus 1493: goto parse_flag;
1494:
1495: case sGssAuthentication:
1496: intptr = &options->gss_authentication;
1497: goto parse_flag;
1498:
1499: case sGssCleanupCreds:
1500: intptr = &options->gss_cleanup_creds;
1.271 djm 1501: goto parse_flag;
1502:
1503: case sGssStrictAcceptor:
1504: intptr = &options->gss_strict_acceptor;
1.94 markus 1505: goto parse_flag;
1506:
1507: case sPasswordAuthentication:
1508: intptr = &options->password_authentication;
1509: goto parse_flag;
1510:
1511: case sKbdInteractiveAuthentication:
1512: intptr = &options->kbd_interactive_authentication;
1513: goto parse_flag;
1514:
1515: case sChallengeResponseAuthentication:
1516: intptr = &options->challenge_response_authentication;
1517: goto parse_flag;
1518:
1519: case sPrintMotd:
1520: intptr = &options->print_motd;
1521: goto parse_flag;
1522:
1523: case sPrintLastLog:
1524: intptr = &options->print_lastlog;
1525: goto parse_flag;
1526:
1527: case sX11Forwarding:
1528: intptr = &options->x11_forwarding;
1529: goto parse_flag;
1530:
1531: case sX11DisplayOffset:
1532: intptr = &options->x11_display_offset;
1.293 naddy 1533: parse_int:
1534: arg = strdelim(&cp);
1.322 dtucker 1535: if ((errstr = atoi_err(arg, &value)) != NULL)
1536: fatal("%s line %d: integer value %s.",
1537: filename, linenum, errstr);
1.293 naddy 1538: if (*activep && *intptr == -1)
1539: *intptr = value;
1540: break;
1.99 stevesk 1541:
1542: case sX11UseLocalhost:
1543: intptr = &options->x11_use_localhost;
1544: goto parse_flag;
1.94 markus 1545:
1546: case sXAuthLocation:
1547: charptr = &options->xauth_location;
1548: goto parse_filename;
1549:
1.244 djm 1550: case sPermitTTY:
1551: intptr = &options->permit_tty;
1552: goto parse_flag;
1553:
1.250 djm 1554: case sPermitUserRC:
1555: intptr = &options->permit_user_rc;
1556: goto parse_flag;
1557:
1.94 markus 1558: case sStrictModes:
1559: intptr = &options->strict_modes;
1560: goto parse_flag;
1561:
1.129 markus 1562: case sTCPKeepAlive:
1563: intptr = &options->tcp_keep_alive;
1.94 markus 1564: goto parse_flag;
1565:
1566: case sEmptyPasswd:
1567: intptr = &options->permit_empty_passwd;
1.113 markus 1568: goto parse_flag;
1569:
1570: case sPermitUserEnvironment:
1571: intptr = &options->permit_user_env;
1.367 djm 1572: charptr = &options->permit_user_env_allowlist;
1.334 djm 1573: arg = strdelim(&cp);
1574: if (!arg || *arg == '\0')
1575: fatal("%s line %d: missing argument.",
1576: filename, linenum);
1577: value = 0;
1578: p = NULL;
1579: if (strcmp(arg, "yes") == 0)
1580: value = 1;
1581: else if (strcmp(arg, "no") == 0)
1582: value = 0;
1583: else {
1584: /* Pattern-list specified */
1585: value = 1;
1586: p = xstrdup(arg);
1587: }
1588: if (*activep && *intptr == -1) {
1589: *intptr = value;
1590: *charptr = p;
1591: p = NULL;
1592: }
1593: free(p);
1594: break;
1.94 markus 1595:
1.111 markus 1596: case sCompression:
1597: intptr = &options->compression;
1.220 djm 1598: multistate_ptr = multistate_compression;
1599: goto parse_multistate;
1.94 markus 1600:
1.235 dtucker 1601: case sRekeyLimit:
1602: arg = strdelim(&cp);
1603: if (!arg || *arg == '\0')
1604: fatal("%.200s line %d: Missing argument.", filename,
1605: linenum);
1606: if (strcmp(arg, "default") == 0) {
1607: val64 = 0;
1608: } else {
1.236 dtucker 1609: if (scan_scaled(arg, &val64) == -1)
1610: fatal("%.200s line %d: Bad number '%s': %s",
1611: filename, linenum, arg, strerror(errno));
1.235 dtucker 1612: if (val64 != 0 && val64 < 16)
1613: fatal("%.200s line %d: RekeyLimit too small",
1614: filename, linenum);
1615: }
1616: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1617: options->rekey_limit = val64;
1.235 dtucker 1618: if (cp != NULL) { /* optional rekey interval present */
1619: if (strcmp(cp, "none") == 0) {
1620: (void)strdelim(&cp); /* discard */
1621: break;
1622: }
1623: intptr = &options->rekey_interval;
1624: goto parse_time;
1625: }
1626: break;
1627:
1.94 markus 1628: case sGatewayPorts:
1.251 millert 1629: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1630: multistate_ptr = multistate_gatewayports;
1631: goto parse_multistate;
1.25 markus 1632:
1.122 markus 1633: case sUseDNS:
1634: intptr = &options->use_dns;
1.94 markus 1635: goto parse_flag;
1.53 markus 1636:
1.94 markus 1637: case sLogFacility:
1.174 dtucker 1638: log_facility_ptr = &options->log_facility;
1.94 markus 1639: arg = strdelim(&cp);
1640: value = log_facility_number(arg);
1.101 markus 1641: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1642: fatal("%.200s line %d: unsupported log facility '%s'",
1643: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1644: if (*log_facility_ptr == -1)
1645: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1646: break;
1.25 markus 1647:
1.94 markus 1648: case sLogLevel:
1.174 dtucker 1649: log_level_ptr = &options->log_level;
1.94 markus 1650: arg = strdelim(&cp);
1651: value = log_level_number(arg);
1.101 markus 1652: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1653: fatal("%.200s line %d: unsupported log level '%s'",
1654: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1655: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1656: *log_level_ptr = (LogLevel) value;
1.94 markus 1657: break;
1658:
1.370 djm 1659: case sLogVerbose:
1660: while ((arg = strdelim(&cp)) && *arg != '\0') {
1661: if (!*activep)
1662: continue;
1.376 markus 1663: opt_array_append(filename, linenum, "oLogVerbose",
1.370 djm 1664: &options->log_verbose, &options->num_log_verbose,
1665: arg);
1666: }
1667: break;
1668:
1.94 markus 1669: case sAllowTcpForwarding:
1670: intptr = &options->allow_tcp_forwarding;
1.233 djm 1671: multistate_ptr = multistate_tcpfwd;
1672: goto parse_multistate;
1.102 provos 1673:
1.251 millert 1674: case sAllowStreamLocalForwarding:
1675: intptr = &options->allow_streamlocal_forwarding;
1676: multistate_ptr = multistate_tcpfwd;
1677: goto parse_multistate;
1678:
1.178 pyr 1679: case sAllowAgentForwarding:
1680: intptr = &options->allow_agent_forwarding;
1681: goto parse_flag;
1682:
1.301 djm 1683: case sDisableForwarding:
1684: intptr = &options->disable_forwarding;
1685: goto parse_flag;
1686:
1.94 markus 1687: case sAllowUsers:
1688: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1689: if (match_user(NULL, NULL, NULL, arg) == -1)
1690: fatal("%s line %d: invalid AllowUsers pattern: "
1691: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1692: if (!*activep)
1693: continue;
1.376 markus 1694: opt_array_append(filename, linenum, "AllowUsers",
1.314 djm 1695: &options->allow_users, &options->num_allow_users,
1696: arg);
1.94 markus 1697: }
1698: break;
1.25 markus 1699:
1.94 markus 1700: case sDenyUsers:
1701: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1702: if (match_user(NULL, NULL, NULL, arg) == -1)
1703: fatal("%s line %d: invalid DenyUsers pattern: "
1704: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1705: if (!*activep)
1706: continue;
1.376 markus 1707: opt_array_append(filename, linenum, "DenyUsers",
1.314 djm 1708: &options->deny_users, &options->num_deny_users,
1709: arg);
1.94 markus 1710: }
1711: break;
1.25 markus 1712:
1.94 markus 1713: case sAllowGroups:
1714: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1715: if (!*activep)
1716: continue;
1.376 markus 1717: opt_array_append(filename, linenum, "AllowGroups",
1.314 djm 1718: &options->allow_groups, &options->num_allow_groups,
1719: arg);
1.94 markus 1720: }
1721: break;
1.33 markus 1722:
1.94 markus 1723: case sDenyGroups:
1724: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1725: if (!*activep)
1726: continue;
1.376 markus 1727: opt_array_append(filename, linenum, "DenyGroups",
1.314 djm 1728: &options->deny_groups, &options->num_deny_groups,
1729: arg);
1.94 markus 1730: }
1731: break;
1.66 markus 1732:
1.94 markus 1733: case sCiphers:
1734: arg = strdelim(&cp);
1735: if (!arg || *arg == '\0')
1736: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1737: if (*arg != '-' &&
1738: !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1739: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1740: filename, linenum, arg ? arg : "<NONE>");
1741: if (options->ciphers == NULL)
1742: options->ciphers = xstrdup(arg);
1743: break;
1.33 markus 1744:
1.94 markus 1745: case sMacs:
1746: arg = strdelim(&cp);
1747: if (!arg || *arg == '\0')
1748: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1749: if (*arg != '-' &&
1750: !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1751: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1752: filename, linenum, arg ? arg : "<NONE>");
1753: if (options->macs == NULL)
1754: options->macs = xstrdup(arg);
1.211 djm 1755: break;
1756:
1757: case sKexAlgorithms:
1758: arg = strdelim(&cp);
1759: if (!arg || *arg == '\0')
1760: fatal("%s line %d: Missing argument.",
1761: filename, linenum);
1.304 djm 1762: if (*arg != '-' &&
1.352 naddy 1763: !kex_names_valid(*arg == '+' || *arg == '^' ?
1764: arg + 1 : arg))
1.211 djm 1765: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1766: filename, linenum, arg ? arg : "<NONE>");
1767: if (options->kex_algorithms == NULL)
1768: options->kex_algorithms = xstrdup(arg);
1.94 markus 1769: break;
1.43 jakob 1770:
1.94 markus 1771: case sSubsystem:
1772: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1773: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1774: filename, linenum);
1.94 markus 1775: }
1776: arg = strdelim(&cp);
1777: if (!arg || *arg == '\0')
1778: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1779: filename, linenum);
1.153 dtucker 1780: if (!*activep) {
1781: arg = strdelim(&cp);
1782: break;
1783: }
1.94 markus 1784: for (i = 0; i < options->num_subsystems; i++)
1785: if (strcmp(arg, options->subsystem_name[i]) == 0)
1786: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1787: filename, linenum, arg);
1.94 markus 1788: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1789: arg = strdelim(&cp);
1790: if (!arg || *arg == '\0')
1791: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1792: filename, linenum);
1.94 markus 1793: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1794:
1795: /* Collect arguments (separate to executable) */
1796: p = xstrdup(arg);
1797: len = strlen(p) + 1;
1798: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1799: len += 1 + strlen(arg);
1.264 deraadt 1800: p = xreallocarray(p, 1, len);
1.151 djm 1801: strlcat(p, " ", len);
1802: strlcat(p, arg, len);
1803: }
1804: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1805: options->num_subsystems++;
1806: break;
1.46 markus 1807:
1.94 markus 1808: case sMaxStartups:
1809: arg = strdelim(&cp);
1810: if (!arg || *arg == '\0')
1811: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1812: filename, linenum);
1.94 markus 1813: if ((n = sscanf(arg, "%d:%d:%d",
1814: &options->max_startups_begin,
1815: &options->max_startups_rate,
1816: &options->max_startups)) == 3) {
1817: if (options->max_startups_begin >
1818: options->max_startups ||
1819: options->max_startups_rate > 100 ||
1820: options->max_startups_rate < 1)
1.50 markus 1821: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1822: filename, linenum);
1.94 markus 1823: } else if (n != 1)
1824: fatal("%s line %d: Illegal MaxStartups spec.",
1825: filename, linenum);
1826: else
1827: options->max_startups = options->max_startups_begin;
1828: break;
1.133 dtucker 1829:
1.372 dtucker 1830: case sPerSourceNetBlockSize:
1831: arg = strdelim(&cp);
1832: if (!arg || *arg == '\0')
1833: fatal("%s line %d: Missing PerSourceNetBlockSize spec.",
1834: filename, linenum);
1835: switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
1836: case 2:
1837: if (value2 < 0 || value2 > 128)
1838: n = -1;
1839: /* FALLTHROUGH */
1840: case 1:
1841: if (value < 0 || value > 32)
1842: n = -1;
1843: }
1844: if (n != 1 && n != 2)
1845: fatal("%s line %d: Invalid PerSourceNetBlockSize"
1846: " spec.", filename, linenum);
1847: if (*activep) {
1848: options->per_source_masklen_ipv4 = value;
1849: options->per_source_masklen_ipv6 = value2;
1850: }
1851: break;
1852:
1853: case sPerSourceMaxStartups:
1854: arg = strdelim(&cp);
1855: if (!arg || *arg == '\0')
1856: fatal("%s line %d: Missing PerSourceMaxStartups spec.",
1857: filename, linenum);
1858: if (strcmp(arg, "none") == 0) { /* no limit */
1859: value = INT_MAX;
1860: } else {
1861: if ((errstr = atoi_err(arg, &value)) != NULL)
1862: fatal("%s line %d: integer value %s.",
1863: filename, linenum, errstr);
1864: }
1865: if (*activep)
1866: options->per_source_max_startups = value;
1867: break;
1868:
1.133 dtucker 1869: case sMaxAuthTries:
1870: intptr = &options->max_authtries;
1871: goto parse_int;
1.94 markus 1872:
1.180 djm 1873: case sMaxSessions:
1874: intptr = &options->max_sessions;
1875: goto parse_int;
1876:
1.94 markus 1877: case sBanner:
1878: charptr = &options->banner;
1879: goto parse_filename;
1.176 djm 1880:
1.94 markus 1881: /*
1882: * These options can contain %X options expanded at
1883: * connect time, so that you can specify paths like:
1884: *
1885: * AuthorizedKeysFile /etc/ssh_keys/%u
1886: */
1887: case sAuthorizedKeysFile:
1.219 djm 1888: if (*activep && options->num_authkeys_files == 0) {
1889: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1890: arg = tilde_expand_filename(arg, getuid());
1.376 markus 1891: opt_array_append(filename, linenum,
1.314 djm 1892: "AuthorizedKeysFile",
1893: &options->authorized_keys_files,
1894: &options->num_authkeys_files, arg);
1895: free(arg);
1.219 djm 1896: }
1897: }
1898: return 0;
1899:
1.208 djm 1900: case sAuthorizedPrincipalsFile:
1901: charptr = &options->authorized_principals_file;
1.205 djm 1902: arg = strdelim(&cp);
1903: if (!arg || *arg == '\0')
1904: fatal("%s line %d: missing file name.",
1905: filename, linenum);
1906: if (*activep && *charptr == NULL) {
1.206 markus 1907: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1908: /* increase optional counter */
1909: if (intptr != NULL)
1910: *intptr = *intptr + 1;
1911: }
1912: break;
1.94 markus 1913:
1914: case sClientAliveInterval:
1915: intptr = &options->client_alive_interval;
1916: goto parse_time;
1917:
1918: case sClientAliveCountMax:
1919: intptr = &options->client_alive_count_max;
1920: goto parse_int;
1.131 djm 1921:
1922: case sAcceptEnv:
1923: while ((arg = strdelim(&cp)) && *arg != '\0') {
1924: if (strchr(arg, '=') != NULL)
1925: fatal("%s line %d: Invalid environment name.",
1926: filename, linenum);
1.153 dtucker 1927: if (!*activep)
1.227 markus 1928: continue;
1.376 markus 1929: opt_array_append(filename, linenum, "AcceptEnv",
1.314 djm 1930: &options->accept_env, &options->num_accept_env,
1931: arg);
1.131 djm 1932: }
1933: break;
1.145 reyk 1934:
1.332 djm 1935: case sSetEnv:
1936: uvalue = options->num_setenv;
1937: while ((arg = strdelimw(&cp)) && *arg != '\0') {
1938: if (strchr(arg, '=') == NULL)
1939: fatal("%s line %d: Invalid environment.",
1940: filename, linenum);
1941: if (!*activep || uvalue != 0)
1942: continue;
1.376 markus 1943: opt_array_append(filename, linenum, "SetEnv",
1.332 djm 1944: &options->setenv, &options->num_setenv, arg);
1945: }
1946: break;
1947:
1.145 reyk 1948: case sPermitTunnel:
1949: intptr = &options->permit_tun;
1.146 reyk 1950: arg = strdelim(&cp);
1951: if (!arg || *arg == '\0')
1952: fatal("%s line %d: Missing yes/point-to-point/"
1953: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1954: value = -1;
1955: for (i = 0; tunmode_desc[i].val != -1; i++)
1956: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1957: value = tunmode_desc[i].val;
1958: break;
1959: }
1960: if (value == -1)
1.146 reyk 1961: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1962: "no argument: %s", filename, linenum, arg);
1.268 djm 1963: if (*activep && *intptr == -1)
1.146 reyk 1964: *intptr = value;
1965: break;
1.94 markus 1966:
1.360 djm 1967: case sInclude:
1968: if (cmdline) {
1969: fatal("Include directive not supported as a "
1970: "command-line option");
1971: }
1972: value = 0;
1973: while ((arg2 = strdelim(&cp)) != NULL && *arg2 != '\0') {
1974: value++;
1975: found = 0;
1976: if (*arg2 != '/' && *arg2 != '~') {
1.361 markus 1977: xasprintf(&arg, "%s/%s", SSHDIR, arg2);
1.360 djm 1978: } else
1979: arg = xstrdup(arg2);
1980:
1981: /*
1982: * Don't let included files clobber the containing
1983: * file's Match state.
1984: */
1985: oactive = *activep;
1986:
1987: /* consult cache of include files */
1988: TAILQ_FOREACH(item, includes, entry) {
1989: if (strcmp(item->selector, arg) != 0)
1990: continue;
1991: if (item->filename != NULL) {
1992: parse_server_config_depth(options,
1993: item->filename, item->contents,
1994: includes, connectinfo,
1.365 djm 1995: (*inc_flags & SSHCFG_MATCH_ONLY
1996: ? SSHCFG_MATCH_ONLY : (oactive
1997: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 1998: activep, depth + 1);
1999: }
2000: found = 1;
2001: *activep = oactive;
2002: }
2003: if (found != 0) {
2004: free(arg);
2005: continue;
2006: }
2007:
2008: /* requested glob was not in cache */
2009: debug2("%s line %d: new include %s",
2010: filename, linenum, arg);
2011: if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
2012: if (r != GLOB_NOMATCH) {
2013: fatal("%s line %d: include \"%s\" "
2014: "glob failed", filename,
2015: linenum, arg);
2016: }
2017: /*
2018: * If no entry matched then record a
2019: * placeholder to skip later glob calls.
2020: */
2021: debug2("%s line %d: no match for %s",
2022: filename, linenum, arg);
2023: item = xcalloc(1, sizeof(*item));
2024: item->selector = strdup(arg);
2025: TAILQ_INSERT_TAIL(includes,
2026: item, entry);
2027: }
2028: if (gbuf.gl_pathc > INT_MAX)
1.371 djm 2029: fatal_f("too many glob results");
1.360 djm 2030: for (n = 0; n < (int)gbuf.gl_pathc; n++) {
2031: debug2("%s line %d: including %s",
2032: filename, linenum, gbuf.gl_pathv[n]);
2033: item = xcalloc(1, sizeof(*item));
2034: item->selector = strdup(arg);
2035: item->filename = strdup(gbuf.gl_pathv[n]);
1.371 djm 2036: if ((item->contents = sshbuf_new()) == NULL)
2037: fatal_f("sshbuf_new failed");
1.360 djm 2038: load_server_config(item->filename,
2039: item->contents);
2040: parse_server_config_depth(options,
2041: item->filename, item->contents,
2042: includes, connectinfo,
1.365 djm 2043: (*inc_flags & SSHCFG_MATCH_ONLY
2044: ? SSHCFG_MATCH_ONLY : (oactive
2045: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2046: activep, depth + 1);
2047: *activep = oactive;
2048: TAILQ_INSERT_TAIL(includes, item, entry);
2049: }
2050: globfree(&gbuf);
2051: free(arg);
2052: }
2053: if (value == 0) {
2054: fatal("%s line %d: Include missing filename argument",
2055: filename, linenum);
2056: }
2057: break;
2058:
1.153 dtucker 2059: case sMatch:
2060: if (cmdline)
2061: fatal("Match directive not supported as a command-line "
2062: "option");
1.365 djm 2063: value = match_cfg_line(&cp, linenum,
2064: (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
1.153 dtucker 2065: if (value < 0)
2066: fatal("%s line %d: Bad Match condition", filename,
2067: linenum);
1.365 djm 2068: *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
2069: /* The MATCH_ONLY is applicable only until the first match block */
2070: *inc_flags &= ~SSHCFG_MATCH_ONLY;
1.156 dtucker 2071: break;
2072:
1.330 djm 2073: case sPermitListen:
1.156 dtucker 2074: case sPermitOpen:
1.330 djm 2075: if (opcode == sPermitListen) {
2076: uintptr = &options->num_permitted_listens;
2077: chararrayptr = &options->permitted_listens;
1.329 djm 2078: } else {
2079: uintptr = &options->num_permitted_opens;
2080: chararrayptr = &options->permitted_opens;
2081: }
1.156 dtucker 2082: arg = strdelim(&cp);
2083: if (!arg || *arg == '\0')
1.329 djm 2084: fatal("%s line %d: missing %s specification",
2085: filename, linenum, lookup_opcode_name(opcode));
2086: uvalue = *uintptr; /* modified later */
1.310 djm 2087: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 djm 2088: if (*activep && uvalue == 0) {
2089: *uintptr = 1;
2090: *chararrayptr = xcalloc(1,
2091: sizeof(**chararrayptr));
2092: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 2093: }
1.156 dtucker 2094: break;
2095: }
1.159 dtucker 2096: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.333 djm 2097: if (opcode == sPermitListen &&
2098: strchr(arg, ':') == NULL) {
2099: /*
2100: * Allow bare port number for PermitListen
2101: * to indicate a wildcard listen host.
2102: */
2103: xasprintf(&arg2, "*:%s", arg);
2104: } else {
2105: arg2 = xstrdup(arg);
1.348 dtucker 2106: ch = '\0';
1.347 dtucker 2107: p = hpdelim2(&arg, &ch);
2108: if (p == NULL || ch == '/') {
1.333 djm 2109: fatal("%s line %d: missing host in %s",
2110: filename, linenum,
2111: lookup_opcode_name(opcode));
2112: }
2113: p = cleanhostname(p);
1.329 djm 2114: }
2115: if (arg == NULL ||
2116: ((port = permitopen_port(arg)) < 0)) {
2117: fatal("%s line %d: bad port number in %s",
2118: filename, linenum,
2119: lookup_opcode_name(opcode));
2120: }
2121: if (*activep && uvalue == 0) {
1.376 markus 2122: opt_array_append(filename, linenum,
1.329 djm 2123: lookup_opcode_name(opcode),
2124: chararrayptr, uintptr, arg2);
1.314 djm 2125: }
2126: free(arg2);
1.159 dtucker 2127: }
1.153 dtucker 2128: break;
2129:
1.158 dtucker 2130: case sForceCommand:
1.262 dtucker 2131: if (cp == NULL || *cp == '\0')
1.158 dtucker 2132: fatal("%.200s line %d: Missing argument.", filename,
2133: linenum);
2134: len = strspn(cp, WHITESPACE);
2135: if (*activep && options->adm_forced_command == NULL)
2136: options->adm_forced_command = xstrdup(cp + len);
2137: return 0;
2138:
1.176 djm 2139: case sChrootDirectory:
2140: charptr = &options->chroot_directory;
1.177 djm 2141:
2142: arg = strdelim(&cp);
2143: if (!arg || *arg == '\0')
2144: fatal("%s line %d: missing file name.",
2145: filename, linenum);
2146: if (*activep && *charptr == NULL)
2147: *charptr = xstrdup(arg);
2148: break;
1.176 djm 2149:
1.204 djm 2150: case sTrustedUserCAKeys:
2151: charptr = &options->trusted_user_ca_keys;
2152: goto parse_filename;
2153:
2154: case sRevokedKeys:
2155: charptr = &options->revoked_keys_file;
2156: goto parse_filename;
2157:
1.355 djm 2158: case sSecurityKeyProvider:
2159: charptr = &options->sk_provider;
1.356 djm 2160: arg = strdelim(&cp);
2161: if (!arg || *arg == '\0')
2162: fatal("%s line %d: missing file name.",
2163: filename, linenum);
2164: if (*activep && *charptr == NULL) {
2165: *charptr = strcasecmp(arg, "internal") == 0 ?
2166: xstrdup(arg) : derelativise_path(arg);
2167: /* increase optional counter */
2168: if (intptr != NULL)
2169: *intptr = *intptr + 1;
2170: }
2171: break;
1.355 djm 2172:
1.213 djm 2173: case sIPQoS:
2174: arg = strdelim(&cp);
2175: if ((value = parse_ipqos(arg)) == -1)
2176: fatal("%s line %d: Bad IPQoS value: %s",
2177: filename, linenum, arg);
2178: arg = strdelim(&cp);
2179: if (arg == NULL)
2180: value2 = value;
2181: else if ((value2 = parse_ipqos(arg)) == -1)
2182: fatal("%s line %d: Bad IPQoS value: %s",
2183: filename, linenum, arg);
2184: if (*activep) {
2185: options->ip_qos_interactive = value;
2186: options->ip_qos_bulk = value2;
2187: }
2188: break;
2189:
1.225 djm 2190: case sVersionAddendum:
1.262 dtucker 2191: if (cp == NULL || *cp == '\0')
1.225 djm 2192: fatal("%.200s line %d: Missing argument.", filename,
2193: linenum);
2194: len = strspn(cp, WHITESPACE);
2195: if (*activep && options->version_addendum == NULL) {
2196: if (strcasecmp(cp + len, "none") == 0)
2197: options->version_addendum = xstrdup("");
2198: else if (strchr(cp + len, '\r') != NULL)
2199: fatal("%.200s line %d: Invalid argument",
2200: filename, linenum);
2201: else
2202: options->version_addendum = xstrdup(cp + len);
2203: }
2204: return 0;
2205:
1.231 djm 2206: case sAuthorizedKeysCommand:
1.255 jsg 2207: if (cp == NULL)
2208: fatal("%.200s line %d: Missing argument.", filename,
2209: linenum);
1.231 djm 2210: len = strspn(cp, WHITESPACE);
2211: if (*activep && options->authorized_keys_command == NULL) {
2212: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2213: fatal("%.200s line %d: AuthorizedKeysCommand "
2214: "must be an absolute path",
2215: filename, linenum);
2216: options->authorized_keys_command = xstrdup(cp + len);
2217: }
2218: return 0;
2219:
2220: case sAuthorizedKeysCommandUser:
2221: charptr = &options->authorized_keys_command_user;
2222:
2223: arg = strdelim(&cp);
1.255 jsg 2224: if (!arg || *arg == '\0')
2225: fatal("%s line %d: missing AuthorizedKeysCommandUser "
2226: "argument.", filename, linenum);
1.231 djm 2227: if (*activep && *charptr == NULL)
2228: *charptr = xstrdup(arg);
2229: break;
2230:
1.270 djm 2231: case sAuthorizedPrincipalsCommand:
2232: if (cp == NULL)
2233: fatal("%.200s line %d: Missing argument.", filename,
2234: linenum);
2235: len = strspn(cp, WHITESPACE);
2236: if (*activep &&
2237: options->authorized_principals_command == NULL) {
2238: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2239: fatal("%.200s line %d: "
2240: "AuthorizedPrincipalsCommand must be "
2241: "an absolute path", filename, linenum);
2242: options->authorized_principals_command =
2243: xstrdup(cp + len);
2244: }
2245: return 0;
2246:
2247: case sAuthorizedPrincipalsCommandUser:
2248: charptr = &options->authorized_principals_command_user;
2249:
2250: arg = strdelim(&cp);
2251: if (!arg || *arg == '\0')
2252: fatal("%s line %d: missing "
2253: "AuthorizedPrincipalsCommandUser argument.",
2254: filename, linenum);
2255: if (*activep && *charptr == NULL)
2256: *charptr = xstrdup(arg);
2257: break;
2258:
1.232 djm 2259: case sAuthenticationMethods:
1.268 djm 2260: if (options->num_auth_methods == 0) {
1.291 djm 2261: value = 0; /* seen "any" pseudo-method */
1.328 djm 2262: value2 = 0; /* successfully parsed any method */
1.232 djm 2263: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 2264: if (strcmp(arg, "any") == 0) {
2265: if (options->num_auth_methods > 0) {
2266: fatal("%s line %d: \"any\" "
2267: "must appear alone in "
2268: "AuthenticationMethods",
2269: filename, linenum);
2270: }
2271: value = 1;
2272: } else if (value) {
2273: fatal("%s line %d: \"any\" must appear "
2274: "alone in AuthenticationMethods",
2275: filename, linenum);
2276: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 2277: fatal("%s line %d: invalid "
2278: "authentication method list.",
2279: filename, linenum);
1.291 djm 2280: }
1.292 djm 2281: value2 = 1;
1.268 djm 2282: if (!*activep)
2283: continue;
1.376 markus 2284: opt_array_append(filename, linenum,
1.314 djm 2285: "AuthenticationMethods",
2286: &options->auth_methods,
2287: &options->num_auth_methods, arg);
1.232 djm 2288: }
1.292 djm 2289: if (value2 == 0) {
1.291 djm 2290: fatal("%s line %d: no AuthenticationMethods "
2291: "specified", filename, linenum);
2292: }
1.232 djm 2293: }
2294: return 0;
2295:
1.251 millert 2296: case sStreamLocalBindMask:
2297: arg = strdelim(&cp);
2298: if (!arg || *arg == '\0')
1.268 djm 2299: fatal("%s line %d: missing StreamLocalBindMask "
2300: "argument.", filename, linenum);
1.251 millert 2301: /* Parse mode in octal format */
2302: value = strtol(arg, &p, 8);
2303: if (arg == p || value < 0 || value > 0777)
2304: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 2305: if (*activep)
2306: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 2307: break;
2308:
2309: case sStreamLocalBindUnlink:
2310: intptr = &options->fwd_opts.streamlocal_bind_unlink;
2311: goto parse_flag;
2312:
1.256 djm 2313: case sFingerprintHash:
2314: arg = strdelim(&cp);
2315: if (!arg || *arg == '\0')
2316: fatal("%.200s line %d: Missing argument.",
2317: filename, linenum);
2318: if ((value = ssh_digest_alg_by_name(arg)) == -1)
2319: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
2320: filename, linenum, arg);
2321: if (*activep)
2322: options->fingerprint_hash = value;
2323: break;
2324:
1.309 djm 2325: case sExposeAuthInfo:
2326: intptr = &options->expose_userauth_info;
2327: goto parse_flag;
2328:
1.316 djm 2329: case sRDomain:
2330: charptr = &options->routing_domain;
2331: arg = strdelim(&cp);
2332: if (!arg || *arg == '\0')
2333: fatal("%.200s line %d: Missing argument.",
2334: filename, linenum);
2335: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2336: !valid_rdomain(arg))
2337: fatal("%s line %d: bad routing domain",
2338: filename, linenum);
2339: if (*activep && *charptr == NULL)
2340: *charptr = xstrdup(arg);
1.321 dtucker 2341: break;
1.316 djm 2342:
1.94 markus 2343: case sDeprecated:
1.295 djm 2344: case sIgnore:
1.121 jakob 2345: case sUnsupported:
1.295 djm 2346: do_log2(opcode == sIgnore ?
2347: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2348: "%s line %d: %s option %s", filename, linenum,
2349: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 2350: while (arg)
2351: arg = strdelim(&cp);
2352: break;
2353:
2354: default:
2355: fatal("%s line %d: Missing handler for opcode %s (%d)",
2356: filename, linenum, arg, opcode);
2357: }
2358: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
2359: fatal("%s line %d: garbage at end of line; \"%.200s\".",
2360: filename, linenum, arg);
2361: return 0;
2362: }
2363:
1.360 djm 2364: int
2365: process_server_config_line(ServerOptions *options, char *line,
2366: const char *filename, int linenum, int *activep,
2367: struct connection_info *connectinfo, struct include_list *includes)
2368: {
1.365 djm 2369: int inc_flags = 0;
2370:
1.360 djm 2371: return process_server_config_line_depth(options, line, filename,
1.365 djm 2372: linenum, activep, connectinfo, &inc_flags, 0, includes);
1.360 djm 2373: }
2374:
2375:
1.94 markus 2376: /* Reads the server configuration file. */
1.25 markus 2377:
1.94 markus 2378: void
1.338 markus 2379: load_server_config(const char *filename, struct sshbuf *conf)
1.94 markus 2380: {
1.366 markus 2381: struct stat st;
1.331 markus 2382: char *line = NULL, *cp;
2383: size_t linesize = 0;
1.94 markus 2384: FILE *f;
1.338 markus 2385: int r, lineno = 0;
1.81 stevesk 2386:
1.371 djm 2387: debug2_f("filename %s", filename);
1.134 djm 2388: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2389: perror(filename);
2390: exit(1);
2391: }
1.338 markus 2392: sshbuf_reset(conf);
1.366 markus 2393: /* grow buffer, so realloc is avoided for large config files */
2394: if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
2395: (r = sshbuf_allocate(conf, st.st_size)) != 0)
1.371 djm 2396: fatal_fr(r, "allocate");
1.331 markus 2397: while (getline(&line, &linesize, f) != -1) {
1.229 dtucker 2398: lineno++;
1.134 djm 2399: /*
2400: * Trim out comments and strip whitespace
1.135 deraadt 2401: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2402: * line numbers later for error messages
2403: */
2404: if ((cp = strchr(line, '#')) != NULL)
2405: memcpy(cp, "\n", 2);
2406: cp = line + strspn(line, " \t\r");
1.338 markus 2407: if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
1.371 djm 2408: fatal_fr(r, "sshbuf_put");
1.134 djm 2409: }
1.331 markus 2410: free(line);
1.338 markus 2411: if ((r = sshbuf_put_u8(conf, 0)) != 0)
1.371 djm 2412: fatal_fr(r, "sshbuf_put_u8");
1.134 djm 2413: fclose(f);
1.371 djm 2414: debug2_f("done config len = %zu", sshbuf_len(conf));
1.134 djm 2415: }
2416:
2417: void
1.226 dtucker 2418: parse_server_match_config(ServerOptions *options,
1.360 djm 2419: struct include_list *includes, struct connection_info *connectinfo)
1.153 dtucker 2420: {
2421: ServerOptions mo;
2422:
2423: initialize_server_options(&mo);
1.360 djm 2424: parse_server_config(&mo, "reprocess config", cfg, includes,
2425: connectinfo);
1.168 dtucker 2426: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2427: }
2428:
1.226 dtucker 2429: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2430: {
2431: char *p;
2432:
2433: while ((p = strsep(&spec, ",")) && *p != '\0') {
2434: if (strncmp(p, "addr=", 5) == 0) {
2435: ci->address = xstrdup(p + 5);
2436: } else if (strncmp(p, "host=", 5) == 0) {
2437: ci->host = xstrdup(p + 5);
2438: } else if (strncmp(p, "user=", 5) == 0) {
2439: ci->user = xstrdup(p + 5);
2440: } else if (strncmp(p, "laddr=", 6) == 0) {
2441: ci->laddress = xstrdup(p + 6);
1.317 djm 2442: } else if (strncmp(p, "rdomain=", 8) == 0) {
2443: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2444: } else if (strncmp(p, "lport=", 6) == 0) {
2445: ci->lport = a2port(p + 6);
2446: if (ci->lport == -1) {
2447: fprintf(stderr, "Invalid port '%s' in test mode"
2448: " specification %s\n", p+6, p);
2449: return -1;
2450: }
2451: } else {
2452: fprintf(stderr, "Invalid test mode specification %s\n",
2453: p);
2454: return -1;
2455: }
2456: }
2457: return 0;
2458: }
2459:
1.168 dtucker 2460: /*
2461: * Copy any supported values that are set.
2462: *
1.195 jj 2463: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2464: * array values that are not used pre-authentication, because any that we
1.328 djm 2465: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2466: */
1.153 dtucker 2467: void
1.168 dtucker 2468: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2469: {
1.247 djm 2470: #define M_CP_INTOPT(n) do {\
2471: if (src->n != -1) \
2472: dst->n = src->n; \
2473: } while (0)
2474:
1.168 dtucker 2475: M_CP_INTOPT(password_authentication);
2476: M_CP_INTOPT(gss_authentication);
2477: M_CP_INTOPT(pubkey_authentication);
1.354 djm 2478: M_CP_INTOPT(pubkey_auth_options);
1.168 dtucker 2479: M_CP_INTOPT(kerberos_authentication);
2480: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2481: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2482: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2483: M_CP_INTOPT(permit_root_login);
1.188 djm 2484: M_CP_INTOPT(permit_empty_passwd);
1.362 djm 2485: M_CP_INTOPT(ignore_rhosts);
1.168 dtucker 2486:
2487: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2488: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2489: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2490: M_CP_INTOPT(disable_forwarding);
1.309 djm 2491: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2492: M_CP_INTOPT(permit_tun);
1.251 millert 2493: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2494: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2495: M_CP_INTOPT(x11_display_offset);
2496: M_CP_INTOPT(x11_forwarding);
2497: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2498: M_CP_INTOPT(permit_tty);
1.250 djm 2499: M_CP_INTOPT(permit_user_rc);
1.180 djm 2500: M_CP_INTOPT(max_sessions);
1.184 dtucker 2501: M_CP_INTOPT(max_authtries);
1.300 markus 2502: M_CP_INTOPT(client_alive_count_max);
2503: M_CP_INTOPT(client_alive_interval);
1.213 djm 2504: M_CP_INTOPT(ip_qos_interactive);
2505: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2506: M_CP_INTOPT(rekey_limit);
2507: M_CP_INTOPT(rekey_interval);
1.308 djm 2508: M_CP_INTOPT(log_level);
1.289 djm 2509:
2510: /*
2511: * The bind_mask is a mode_t that may be unsigned, so we can't use
2512: * M_CP_INTOPT - it does a signed comparison that causes compiler
2513: * warnings.
2514: */
1.290 dtucker 2515: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2516: dst->fwd_opts.streamlocal_bind_mask =
2517: src->fwd_opts.streamlocal_bind_mask;
2518: }
1.247 djm 2519:
2520: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2521: #define M_CP_STROPT(n) do {\
2522: if (src->n != NULL && dst->n != src->n) { \
2523: free(dst->n); \
2524: dst->n = src->n; \
2525: } \
2526: } while(0)
1.314 djm 2527: #define M_CP_STRARRAYOPT(s, num_s) do {\
2528: u_int i; \
2529: if (src->num_s != 0) { \
2530: for (i = 0; i < dst->num_s; i++) \
2531: free(dst->s[i]); \
2532: free(dst->s); \
2533: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2534: for (i = 0; i < src->num_s; i++) \
2535: dst->s[i] = xstrdup(src->s[i]); \
2536: dst->num_s = src->num_s; \
1.312 djm 2537: } \
2538: } while(0)
1.168 dtucker 2539:
1.218 djm 2540: /* See comment in servconf.h */
2541: COPY_MATCH_STRING_OPTS();
1.282 djm 2542:
2543: /* Arguments that accept '+...' need to be expanded */
2544: assemble_algorithms(dst);
1.216 djm 2545:
1.217 dtucker 2546: /*
2547: * The only things that should be below this point are string options
2548: * which are only used after authentication.
2549: */
1.168 dtucker 2550: if (preauth)
2551: return;
1.219 djm 2552:
1.283 djm 2553: /* These options may be "none" to clear a global setting */
1.168 dtucker 2554: M_CP_STROPT(adm_forced_command);
1.283 djm 2555: if (option_clear_or_none(dst->adm_forced_command)) {
2556: free(dst->adm_forced_command);
2557: dst->adm_forced_command = NULL;
2558: }
1.176 djm 2559: M_CP_STROPT(chroot_directory);
1.283 djm 2560: if (option_clear_or_none(dst->chroot_directory)) {
2561: free(dst->chroot_directory);
2562: dst->chroot_directory = NULL;
2563: }
1.153 dtucker 2564: }
1.168 dtucker 2565:
2566: #undef M_CP_INTOPT
2567: #undef M_CP_STROPT
1.219 djm 2568: #undef M_CP_STRARRAYOPT
1.153 dtucker 2569:
1.360 djm 2570: #define SERVCONF_MAX_DEPTH 16
1.364 djm 2571: static void
1.360 djm 2572: parse_server_config_depth(ServerOptions *options, const char *filename,
2573: struct sshbuf *conf, struct include_list *includes,
2574: struct connection_info *connectinfo, int flags, int *activep, int depth)
1.134 djm 2575: {
1.360 djm 2576: int linenum, bad_options = 0;
1.136 dtucker 2577: char *cp, *obuf, *cbuf;
1.134 djm 2578:
1.360 djm 2579: if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2580: fatal("Too many recursive configuration includes");
2581:
1.371 djm 2582: debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
1.365 djm 2583: (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
1.134 djm 2584:
1.287 djm 2585: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
1.371 djm 2586: fatal_f("sshbuf_dup_string failed");
1.137 dtucker 2587: linenum = 1;
1.140 deraadt 2588: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.360 djm 2589: if (process_server_config_line_depth(options, cp,
1.365 djm 2590: filename, linenum++, activep, connectinfo, &flags,
1.360 djm 2591: depth, includes) != 0)
1.94 markus 2592: bad_options++;
1.1 deraadt 2593: }
1.239 djm 2594: free(obuf);
1.78 stevesk 2595: if (bad_options > 0)
2596: fatal("%s: terminating, %d bad configuration options",
2597: filename, bad_options);
1.360 djm 2598: }
2599:
2600: void
2601: parse_server_config(ServerOptions *options, const char *filename,
2602: struct sshbuf *conf, struct include_list *includes,
2603: struct connection_info *connectinfo)
2604: {
2605: int active = connectinfo ? 0 : 1;
2606: parse_server_config_depth(options, filename, conf, includes,
1.365 djm 2607: connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
1.364 djm 2608: process_queued_listen_addrs(options);
1.182 dtucker 2609: }
2610:
2611: static const char *
1.221 djm 2612: fmt_multistate_int(int val, const struct multistate *m)
2613: {
2614: u_int i;
2615:
2616: for (i = 0; m[i].key != NULL; i++) {
2617: if (m[i].value == val)
2618: return m[i].key;
2619: }
2620: return "UNKNOWN";
2621: }
2622:
2623: static const char *
1.182 dtucker 2624: fmt_intarg(ServerOpCodes code, int val)
2625: {
1.221 djm 2626: if (val == -1)
2627: return "unset";
2628: switch (code) {
2629: case sAddressFamily:
2630: return fmt_multistate_int(val, multistate_addressfamily);
2631: case sPermitRootLogin:
2632: return fmt_multistate_int(val, multistate_permitrootlogin);
2633: case sGatewayPorts:
2634: return fmt_multistate_int(val, multistate_gatewayports);
2635: case sCompression:
2636: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2637: case sAllowTcpForwarding:
2638: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2639: case sAllowStreamLocalForwarding:
2640: return fmt_multistate_int(val, multistate_tcpfwd);
1.363 djm 2641: case sIgnoreRhosts:
2642: return fmt_multistate_int(val, multistate_ignore_rhosts);
1.256 djm 2643: case sFingerprintHash:
2644: return ssh_digest_alg_name(val);
1.221 djm 2645: default:
2646: switch (val) {
2647: case 0:
2648: return "no";
2649: case 1:
2650: return "yes";
2651: default:
2652: return "UNKNOWN";
2653: }
1.182 dtucker 2654: }
2655: }
2656:
2657: static void
2658: dump_cfg_int(ServerOpCodes code, int val)
2659: {
2660: printf("%s %d\n", lookup_opcode_name(code), val);
2661: }
2662:
2663: static void
1.263 dtucker 2664: dump_cfg_oct(ServerOpCodes code, int val)
2665: {
2666: printf("%s 0%o\n", lookup_opcode_name(code), val);
2667: }
2668:
2669: static void
1.182 dtucker 2670: dump_cfg_fmtint(ServerOpCodes code, int val)
2671: {
2672: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2673: }
2674:
2675: static void
2676: dump_cfg_string(ServerOpCodes code, const char *val)
2677: {
1.257 djm 2678: printf("%s %s\n", lookup_opcode_name(code),
2679: val == NULL ? "none" : val);
1.182 dtucker 2680: }
2681:
2682: static void
2683: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2684: {
2685: u_int i;
2686:
2687: for (i = 0; i < count; i++)
1.219 djm 2688: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2689: }
2690:
2691: static void
2692: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2693: {
2694: u_int i;
2695:
1.291 djm 2696: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2697: return;
1.219 djm 2698: printf("%s", lookup_opcode_name(code));
2699: for (i = 0; i < count; i++)
2700: printf(" %s", vals[i]);
1.291 djm 2701: if (code == sAuthenticationMethods && count == 0)
2702: printf(" any");
1.219 djm 2703: printf("\n");
1.182 dtucker 2704: }
2705:
1.315 djm 2706: static char *
2707: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2708: {
1.315 djm 2709: int r;
1.182 dtucker 2710: struct addrinfo *ai;
1.315 djm 2711: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2712: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2713:
1.263 dtucker 2714: /*
2715: * ListenAddress must be after Port. add_one_listen_addr pushes
2716: * addresses onto a stack, so to maintain ordering we need to
2717: * print these in reverse order.
2718: */
1.315 djm 2719: for (ai = la->addrs; ai; ai = ai->ai_next) {
2720: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2721: sizeof(addr), port, sizeof(port),
2722: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2723: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2724: continue;
2725: }
2726: laddr2 = laddr1;
2727: if (ai->ai_family == AF_INET6) {
2728: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2729: addr, port,
2730: la->rdomain == NULL ? "" : " rdomain ",
2731: la->rdomain == NULL ? "" : la->rdomain,
2732: laddr2);
1.182 dtucker 2733: } else {
1.315 djm 2734: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2735: addr, port,
2736: la->rdomain == NULL ? "" : " rdomain ",
2737: la->rdomain == NULL ? "" : la->rdomain,
2738: laddr2);
1.182 dtucker 2739: }
1.315 djm 2740: free(laddr2);
2741: }
2742: return laddr1;
2743: }
2744:
2745: void
2746: dump_config(ServerOptions *o)
2747: {
2748: char *s;
2749: u_int i;
2750:
2751: /* these are usually at the top of the config */
2752: for (i = 0; i < o->num_ports; i++)
2753: printf("port %d\n", o->ports[i]);
2754: dump_cfg_fmtint(sAddressFamily, o->address_family);
2755:
2756: for (i = 0; i < o->num_listen_addrs; i++) {
2757: s = format_listen_addrs(&o->listen_addrs[i]);
2758: printf("%s", s);
2759: free(s);
1.182 dtucker 2760: }
2761:
2762: /* integer arguments */
2763: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2764: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2765: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2766: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2767: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2768: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2769: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2770:
2771: /* formatted integer arguments */
2772: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2773: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2774: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2775: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2776: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2777: o->hostbased_uses_name_from_packet_only);
2778: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2779: #ifdef KRB5
1.182 dtucker 2780: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2781: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2782: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2783: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2784: #endif
2785: #ifdef GSSAPI
1.182 dtucker 2786: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2787: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2788: #endif
1.182 dtucker 2789: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2790: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2791: o->kbd_interactive_authentication);
2792: dump_cfg_fmtint(sChallengeResponseAuthentication,
2793: o->challenge_response_authentication);
2794: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2795: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2796: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2797: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2798: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2799: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2800: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2801: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2802: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2803: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2804: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2805: dump_cfg_fmtint(sUseDNS, o->use_dns);
2806: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2807: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2808: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2809: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2810: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2811: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2812: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2813:
2814: /* string arguments */
2815: dump_cfg_string(sPidFile, o->pid_file);
1.378 ! dtucker 2816: dump_cfg_string(sModuliFile, o->moduli_file);
1.182 dtucker 2817: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.358 dtucker 2818: dump_cfg_string(sCiphers, o->ciphers);
2819: dump_cfg_string(sMacs, o->macs);
1.182 dtucker 2820: dump_cfg_string(sBanner, o->banner);
2821: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2822: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2823: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2824: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.355 djm 2825: dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
1.208 djm 2826: dump_cfg_string(sAuthorizedPrincipalsFile,
2827: o->authorized_principals_file);
1.261 dtucker 2828: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2829: ? "none" : o->version_addendum);
1.231 djm 2830: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2831: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2832: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2833: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2834: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.358 dtucker 2835: dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
2836: dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
1.375 dtucker 2837: dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
1.358 dtucker 2838: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
1.374 dtucker 2839: dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
1.316 djm 2840: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2841:
2842: /* string arguments requiring a lookup */
2843: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2844: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2845:
2846: /* string array arguments */
1.219 djm 2847: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2848: o->authorized_keys_files);
1.182 dtucker 2849: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2850: o->host_key_files);
1.261 dtucker 2851: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2852: o->host_cert_files);
1.182 dtucker 2853: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2854: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2855: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2856: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2857: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.332 djm 2858: dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
1.232 djm 2859: dump_cfg_strarray_oneline(sAuthenticationMethods,
2860: o->num_auth_methods, o->auth_methods);
1.370 djm 2861: dump_cfg_strarray_oneline(sLogVerbose,
2862: o->num_log_verbose, o->log_verbose);
1.182 dtucker 2863:
2864: /* other arguments */
2865: for (i = 0; i < o->num_subsystems; i++)
2866: printf("subsystem %s %s\n", o->subsystem_name[i],
2867: o->subsystem_args[i]);
2868:
2869: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2870: o->max_startups_rate, o->max_startups);
1.372 dtucker 2871: printf("persourcemaxstartups ");
2872: if (o->per_source_max_startups == INT_MAX)
2873: printf("none\n");
2874: else
2875: printf("%d\n", o->per_source_max_startups);
1.373 dtucker 2876: printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
1.372 dtucker 2877: o->per_source_masklen_ipv6);
1.182 dtucker 2878:
1.318 djm 2879: s = NULL;
2880: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2881: if (tunmode_desc[i].val == o->permit_tun) {
2882: s = tunmode_desc[i].text;
2883: break;
2884: }
1.318 djm 2885: }
1.182 dtucker 2886: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2887:
1.214 stevesk 2888: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2889: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2890:
1.284 dtucker 2891: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2892: o->rekey_interval);
1.182 dtucker 2893:
1.310 djm 2894: printf("permitopen");
2895: if (o->num_permitted_opens == 0)
2896: printf(" any");
2897: else {
2898: for (i = 0; i < o->num_permitted_opens; i++)
2899: printf(" %s", o->permitted_opens[i]);
1.329 djm 2900: }
2901: printf("\n");
1.330 djm 2902: printf("permitlisten");
2903: if (o->num_permitted_listens == 0)
1.329 djm 2904: printf(" any");
2905: else {
1.330 djm 2906: for (i = 0; i < o->num_permitted_listens; i++)
2907: printf(" %s", o->permitted_listens[i]);
1.310 djm 2908: }
2909: printf("\n");
1.334 djm 2910:
1.367 djm 2911: if (o->permit_user_env_allowlist == NULL) {
1.334 djm 2912: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2913: } else {
2914: printf("permituserenvironment %s\n",
1.367 djm 2915: o->permit_user_env_allowlist);
1.334 djm 2916: }
2917:
1.354 djm 2918: printf("pubkeyauthoptions");
2919: if (o->pubkey_auth_options == 0)
2920: printf(" none");
2921: if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
2922: printf(" touch-required");
1.368 djm 2923: if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
2924: printf(" verify-required");
1.354 djm 2925: printf("\n");
1.1 deraadt 2926: }
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