Annotation of src/usr.bin/ssh/servconf.c, Revision 1.385
1.226 dtucker 1:
1.385 ! djm 2: /* $OpenBSD: servconf.c,v 1.384 2022/03/18 04:04:11 djm Exp $ */
1.1 deraadt 3: /*
1.26 deraadt 4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.34 markus 6: *
1.51 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 12: */
1.1 deraadt 13:
1.152 stevesk 14: #include <sys/types.h>
15: #include <sys/socket.h>
1.179 djm 16: #include <sys/queue.h>
1.315 djm 17: #include <sys/sysctl.h>
1.366 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;
1.25 markus 125: options->permit_empty_passwd = -1;
1.113 markus 126: options->permit_user_env = -1;
1.367 djm 127: options->permit_user_env_allowlist = NULL;
1.111 markus 128: options->compression = -1;
1.235 dtucker 129: options->rekey_limit = -1;
130: options->rekey_interval = -1;
1.53 markus 131: options->allow_tcp_forwarding = -1;
1.251 millert 132: options->allow_streamlocal_forwarding = -1;
1.178 pyr 133: options->allow_agent_forwarding = -1;
1.25 markus 134: options->num_allow_users = 0;
135: options->num_deny_users = 0;
136: options->num_allow_groups = 0;
137: options->num_deny_groups = 0;
1.33 markus 138: options->ciphers = NULL;
1.66 markus 139: options->macs = NULL;
1.211 djm 140: options->kex_algorithms = NULL;
1.341 djm 141: options->ca_sign_algorithms = NULL;
1.251 millert 142: options->fwd_opts.gateway_ports = -1;
143: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
144: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 145: options->num_subsystems = 0;
1.50 markus 146: options->max_startups_begin = -1;
147: options->max_startups_rate = -1;
1.46 markus 148: options->max_startups = -1;
1.372 dtucker 149: options->per_source_max_startups = -1;
150: options->per_source_masklen_ipv4 = -1;
151: options->per_source_masklen_ipv6 = -1;
1.133 dtucker 152: options->max_authtries = -1;
1.180 djm 153: options->max_sessions = -1;
1.57 markus 154: options->banner = NULL;
1.122 markus 155: options->use_dns = -1;
1.77 beck 156: options->client_alive_interval = -1;
157: options->client_alive_count_max = -1;
1.219 djm 158: options->num_authkeys_files = 0;
1.131 djm 159: options->num_accept_env = 0;
1.332 djm 160: options->num_setenv = 0;
1.145 reyk 161: options->permit_tun = -1;
1.310 djm 162: options->permitted_opens = NULL;
1.330 djm 163: options->permitted_listens = NULL;
1.158 dtucker 164: options->adm_forced_command = NULL;
1.176 djm 165: options->chroot_directory = NULL;
1.231 djm 166: options->authorized_keys_command = NULL;
167: options->authorized_keys_command_user = NULL;
1.204 djm 168: options->revoked_keys_file = NULL;
1.355 djm 169: options->sk_provider = NULL;
1.204 djm 170: options->trusted_user_ca_keys = NULL;
1.208 djm 171: options->authorized_principals_file = NULL;
1.270 djm 172: options->authorized_principals_command = NULL;
173: options->authorized_principals_command_user = NULL;
1.213 djm 174: options->ip_qos_interactive = -1;
175: options->ip_qos_bulk = -1;
1.225 djm 176: options->version_addendum = NULL;
1.256 djm 177: options->fingerprint_hash = -1;
1.301 djm 178: options->disable_forwarding = -1;
1.309 djm 179: options->expose_userauth_info = -1;
1.1 deraadt 180: }
181:
1.257 djm 182: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
183: static int
184: option_clear_or_none(const char *o)
185: {
186: return o == NULL || strcasecmp(o, "none") == 0;
187: }
188:
1.282 djm 189: static void
190: assemble_algorithms(ServerOptions *o)
191: {
1.341 djm 192: char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
1.358 dtucker 193: char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
1.340 djm 194: int r;
1.335 djm 195:
196: all_cipher = cipher_alg_list(',', 0);
197: all_mac = mac_alg_list(',');
198: all_kex = kex_alg_list(',');
199: all_key = sshkey_alg_list(0, 0, 1, ',');
1.341 djm 200: all_sig = sshkey_alg_list(0, 1, 1, ',');
1.358 dtucker 201: /* remove unsupported algos from default lists */
1.367 djm 202: def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
203: def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
204: def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
205: def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
206: def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
1.340 djm 207: #define ASSEMBLE(what, defaults, all) \
208: do { \
209: if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
1.371 djm 210: fatal_fr(r, "%s", #what); \
1.340 djm 211: } while (0)
1.358 dtucker 212: ASSEMBLE(ciphers, def_cipher, all_cipher);
213: ASSEMBLE(macs, def_mac, all_mac);
214: ASSEMBLE(kex_algorithms, def_kex, all_kex);
215: ASSEMBLE(hostkeyalgorithms, def_key, all_key);
1.375 dtucker 216: ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
1.374 dtucker 217: ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
1.358 dtucker 218: ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
1.340 djm 219: #undef ASSEMBLE
1.335 djm 220: free(all_cipher);
221: free(all_mac);
222: free(all_kex);
223: free(all_key);
1.341 djm 224: free(all_sig);
1.358 dtucker 225: free(def_cipher);
226: free(def_mac);
227: free(def_kex);
228: free(def_key);
229: free(def_sig);
1.282 djm 230: }
231:
1.314 djm 232: void
233: servconf_add_hostkey(const char *file, const int line,
1.344 djm 234: ServerOptions *options, const char *path, int userprovided)
1.314 djm 235: {
236: char *apath = derelativise_path(path);
237:
1.376 markus 238: opt_array_append2(file, line, "HostKey",
1.344 djm 239: &options->host_key_files, &options->host_key_file_userprovided,
240: &options->num_host_key_files, apath, userprovided);
1.314 djm 241: free(apath);
242: }
243:
244: void
245: servconf_add_hostcert(const char *file, const int line,
246: ServerOptions *options, const char *path)
247: {
248: char *apath = derelativise_path(path);
249:
1.376 markus 250: opt_array_append(file, line, "HostCertificate",
1.314 djm 251: &options->host_cert_files, &options->num_host_cert_files, apath);
252: free(apath);
253: }
254:
1.34 markus 255: void
1.25 markus 256: fill_default_server_options(ServerOptions *options)
1.1 deraadt 257: {
1.314 djm 258: u_int i;
1.257 djm 259:
1.54 markus 260: if (options->num_host_key_files == 0) {
1.293 naddy 261: /* fill default hostkeys */
1.314 djm 262: servconf_add_hostkey("[default]", 0, options,
1.344 djm 263: _PATH_HOST_RSA_KEY_FILE, 0);
1.314 djm 264: servconf_add_hostkey("[default]", 0, options,
1.344 djm 265: _PATH_HOST_ECDSA_KEY_FILE, 0);
1.314 djm 266: servconf_add_hostkey("[default]", 0, options,
1.344 djm 267: _PATH_HOST_ED25519_KEY_FILE, 0);
1.326 markus 268: #ifdef WITH_XMSS
1.325 markus 269: servconf_add_hostkey("[default]", 0, options,
1.344 djm 270: _PATH_HOST_XMSS_KEY_FILE, 0);
1.326 markus 271: #endif /* WITH_XMSS */
1.54 markus 272: }
1.203 djm 273: /* No certificates by default */
1.29 markus 274: if (options->num_ports == 0)
275: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 276: if (options->address_family == -1)
277: options->address_family = AF_UNSPEC;
1.29 markus 278: if (options->listen_addrs == NULL)
1.315 djm 279: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 280: if (options->pid_file == NULL)
1.257 djm 281: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.378 dtucker 282: if (options->moduli_file == NULL)
283: options->moduli_file = xstrdup(_PATH_DH_MODULI);
1.25 markus 284: if (options->login_grace_time == -1)
1.115 stevesk 285: options->login_grace_time = 120;
1.67 markus 286: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 287: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 288: if (options->ignore_rhosts == -1)
1.30 markus 289: options->ignore_rhosts = 1;
1.25 markus 290: if (options->ignore_user_known_hosts == -1)
291: options->ignore_user_known_hosts = 0;
292: if (options->print_motd == -1)
293: options->print_motd = 1;
1.72 stevesk 294: if (options->print_lastlog == -1)
295: options->print_lastlog = 1;
1.25 markus 296: if (options->x11_forwarding == -1)
1.30 markus 297: options->x11_forwarding = 0;
1.25 markus 298: if (options->x11_display_offset == -1)
1.30 markus 299: options->x11_display_offset = 10;
1.99 stevesk 300: if (options->x11_use_localhost == -1)
301: options->x11_use_localhost = 1;
1.42 markus 302: if (options->xauth_location == NULL)
1.257 djm 303: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 304: if (options->permit_tty == -1)
305: options->permit_tty = 1;
1.250 djm 306: if (options->permit_user_rc == -1)
307: options->permit_user_rc = 1;
1.25 markus 308: if (options->strict_modes == -1)
309: options->strict_modes = 1;
1.129 markus 310: if (options->tcp_keep_alive == -1)
311: options->tcp_keep_alive = 1;
1.101 markus 312: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 313: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 314: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 315: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 316: if (options->hostbased_authentication == -1)
317: options->hostbased_authentication = 0;
318: if (options->hostbased_uses_name_from_packet_only == -1)
319: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 320: if (options->pubkey_authentication == -1)
321: options->pubkey_authentication = 1;
1.354 djm 322: if (options->pubkey_auth_options == -1)
323: options->pubkey_auth_options = 0;
1.25 markus 324: if (options->kerberos_authentication == -1)
1.107 markus 325: options->kerberos_authentication = 0;
1.25 markus 326: if (options->kerberos_or_local_passwd == -1)
327: options->kerberos_or_local_passwd = 1;
328: if (options->kerberos_ticket_cleanup == -1)
329: options->kerberos_ticket_cleanup = 1;
1.130 jakob 330: if (options->kerberos_get_afs_token == -1)
331: options->kerberos_get_afs_token = 0;
1.125 markus 332: if (options->gss_authentication == -1)
333: options->gss_authentication = 0;
334: if (options->gss_cleanup_creds == -1)
335: options->gss_cleanup_creds = 1;
1.271 djm 336: if (options->gss_strict_acceptor == -1)
1.302 djm 337: options->gss_strict_acceptor = 1;
1.25 markus 338: if (options->password_authentication == -1)
339: options->password_authentication = 1;
1.52 markus 340: if (options->kbd_interactive_authentication == -1)
1.381 dtucker 341: options->kbd_interactive_authentication = 1;
1.25 markus 342: if (options->permit_empty_passwd == -1)
1.30 markus 343: options->permit_empty_passwd = 0;
1.334 djm 344: if (options->permit_user_env == -1) {
1.113 markus 345: options->permit_user_env = 0;
1.367 djm 346: options->permit_user_env_allowlist = NULL;
1.334 djm 347: }
1.111 markus 348: if (options->compression == -1)
1.359 dtucker 349: #ifdef WITH_ZLIB
1.337 sf 350: options->compression = COMP_DELAYED;
1.359 dtucker 351: #else
352: options->compression = COMP_NONE;
353: #endif
354:
1.235 dtucker 355: if (options->rekey_limit == -1)
356: options->rekey_limit = 0;
357: if (options->rekey_interval == -1)
358: options->rekey_interval = 0;
1.53 markus 359: if (options->allow_tcp_forwarding == -1)
1.233 djm 360: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 361: if (options->allow_streamlocal_forwarding == -1)
362: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 363: if (options->allow_agent_forwarding == -1)
364: options->allow_agent_forwarding = 1;
1.251 millert 365: if (options->fwd_opts.gateway_ports == -1)
366: options->fwd_opts.gateway_ports = 0;
1.46 markus 367: if (options->max_startups == -1)
1.234 dtucker 368: options->max_startups = 100;
1.50 markus 369: if (options->max_startups_rate == -1)
1.234 dtucker 370: options->max_startups_rate = 30; /* 30% */
1.50 markus 371: if (options->max_startups_begin == -1)
1.234 dtucker 372: options->max_startups_begin = 10;
1.372 dtucker 373: if (options->per_source_max_startups == -1)
374: options->per_source_max_startups = INT_MAX;
375: if (options->per_source_masklen_ipv4 == -1)
376: options->per_source_masklen_ipv4 = 32;
377: if (options->per_source_masklen_ipv6 == -1)
378: options->per_source_masklen_ipv6 = 128;
1.133 dtucker 379: if (options->max_authtries == -1)
380: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 381: if (options->max_sessions == -1)
382: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 383: if (options->use_dns == -1)
1.260 deraadt 384: options->use_dns = 0;
1.77 beck 385: if (options->client_alive_interval == -1)
1.95 deraadt 386: options->client_alive_interval = 0;
1.77 beck 387: if (options->client_alive_count_max == -1)
388: options->client_alive_count_max = 3;
1.219 djm 389: if (options->num_authkeys_files == 0) {
1.376 markus 390: opt_array_append("[default]", 0, "AuthorizedKeysFiles",
1.314 djm 391: &options->authorized_keys_files,
392: &options->num_authkeys_files,
393: _PATH_SSH_USER_PERMITTED_KEYS);
1.376 markus 394: opt_array_append("[default]", 0, "AuthorizedKeysFiles",
1.314 djm 395: &options->authorized_keys_files,
396: &options->num_authkeys_files,
397: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 398: }
1.145 reyk 399: if (options->permit_tun == -1)
1.146 reyk 400: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 401: if (options->ip_qos_interactive == -1)
1.327 job 402: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 403: if (options->ip_qos_bulk == -1)
1.327 job 404: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 405: if (options->version_addendum == NULL)
406: options->version_addendum = xstrdup("");
1.251 millert 407: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
408: options->fwd_opts.streamlocal_bind_mask = 0177;
409: if (options->fwd_opts.streamlocal_bind_unlink == -1)
410: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 411: if (options->fingerprint_hash == -1)
412: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 413: if (options->disable_forwarding == -1)
414: options->disable_forwarding = 0;
1.309 djm 415: if (options->expose_userauth_info == -1)
416: options->expose_userauth_info = 0;
1.355 djm 417: if (options->sk_provider == NULL)
418: options->sk_provider = xstrdup("internal");
1.277 djm 419:
1.282 djm 420: assemble_algorithms(options);
1.277 djm 421:
1.285 djm 422: /* Turn privilege separation and sandboxing on by default */
1.102 provos 423: if (use_privsep == -1)
1.285 djm 424: use_privsep = PRIVSEP_ON;
1.257 djm 425:
426: #define CLEAR_ON_NONE(v) \
427: do { \
428: if (option_clear_or_none(v)) { \
429: free(v); \
430: v = NULL; \
431: } \
432: } while(0)
433: CLEAR_ON_NONE(options->pid_file);
434: CLEAR_ON_NONE(options->xauth_location);
435: CLEAR_ON_NONE(options->banner);
436: CLEAR_ON_NONE(options->trusted_user_ca_keys);
437: CLEAR_ON_NONE(options->revoked_keys_file);
1.355 djm 438: CLEAR_ON_NONE(options->sk_provider);
1.267 djm 439: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 440: CLEAR_ON_NONE(options->adm_forced_command);
441: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 442: CLEAR_ON_NONE(options->routing_domain);
1.357 djm 443: CLEAR_ON_NONE(options->host_key_agent);
1.257 djm 444: for (i = 0; i < options->num_host_key_files; i++)
445: CLEAR_ON_NONE(options->host_key_files[i]);
446: for (i = 0; i < options->num_host_cert_files; i++)
447: CLEAR_ON_NONE(options->host_cert_files[i]);
448: #undef CLEAR_ON_NONE
1.291 djm 449:
450: /* Similar handling for AuthenticationMethods=any */
451: if (options->num_auth_methods == 1 &&
452: strcmp(options->auth_methods[0], "any") == 0) {
453: free(options->auth_methods[0]);
454: options->auth_methods[0] = NULL;
455: options->num_auth_methods = 0;
456: }
1.1 deraadt 457: }
458:
459: /* Keyword tokens. */
1.25 markus 460: typedef enum {
461: sBadOption, /* == unknown option */
1.293 naddy 462: sPort, sHostKeyFile, sLoginGraceTime,
1.370 djm 463: sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
1.25 markus 464: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.382 millert 465: sKerberosGetAFSToken, sPasswordAuthentication,
466: sKbdInteractiveAuthentication, sListenAddress, sAddressFamily,
1.72 stevesk 467: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 468: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 469: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 470: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 471: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.378 dtucker 472: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile, sModuliFile,
1.374 dtucker 473: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
1.258 djm 474: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 475: sBanner, sUseDNS, sHostbasedAuthentication,
1.375 dtucker 476: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
1.372 dtucker 477: sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
1.258 djm 478: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 479: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
1.332 djm 480: sAcceptEnv, sSetEnv, sPermitTunnel,
1.330 djm 481: sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
1.200 dtucker 482: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.360 djm 483: sHostCertificate, sInclude,
1.208 djm 484: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 485: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.341 djm 486: sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 487: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 488: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 489: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 490: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.355 djm 491: sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
1.295 djm 492: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 493: } ServerOpCodes;
494:
1.360 djm 495: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
496: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
497: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
498: #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
1.365 djm 499: #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
1.153 dtucker 500:
1.1 deraadt 501: /* Textual representation of the tokens. */
1.25 markus 502: static struct {
503: const char *name;
504: ServerOpCodes opcode;
1.153 dtucker 505: u_int flags;
1.25 markus 506: } keywords[] = {
1.153 dtucker 507: { "port", sPort, SSHCFG_GLOBAL },
508: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
509: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 510: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 511: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.378 dtucker 512: { "modulifile", sModuliFile, SSHCFG_GLOBAL },
1.293 naddy 513: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 514: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 515: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 516: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 517: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 518: { "loglevel", sLogLevel, SSHCFG_ALL },
1.370 djm 519: { "logverbose", sLogVerbose, SSHCFG_ALL },
1.153 dtucker 520: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 521: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 522: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 523: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.377 dtucker 524: { "hostbasedacceptedalgorithms", sHostbasedAcceptedAlgorithms, SSHCFG_ALL },
1.375 dtucker 525: { "hostbasedacceptedkeytypes", sHostbasedAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
1.276 markus 526: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 527: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 528: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.377 dtucker 529: { "pubkeyacceptedalgorithms", sPubkeyAcceptedAlgorithms, SSHCFG_ALL },
1.374 dtucker 530: { "pubkeyacceptedkeytypes", sPubkeyAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
1.354 djm 531: { "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
1.153 dtucker 532: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 533: #ifdef KRB5
1.168 dtucker 534: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 535: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
536: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
537: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 538: #else
1.168 dtucker 539: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 540: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
541: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
542: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 543: #endif
1.153 dtucker 544: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
545: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 546: #ifdef GSSAPI
1.168 dtucker 547: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 548: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 549: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 550: #else
1.168 dtucker 551: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 552: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 553: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 554: #endif
1.168 dtucker 555: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
556: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.381 dtucker 557: { "challengeresponseauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
558: { "skeyauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
1.153 dtucker 559: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
560: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
561: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
562: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
563: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
1.362 djm 564: { "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
1.153 dtucker 565: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 566: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
567: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
568: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 569: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
570: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 571: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 572: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 573: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 574: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 575: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 576: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
577: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
578: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 579: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 580: { "allowusers", sAllowUsers, SSHCFG_ALL },
581: { "denyusers", sDenyUsers, SSHCFG_ALL },
582: { "allowgroups", sAllowGroups, SSHCFG_ALL },
583: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 584: { "ciphers", sCiphers, SSHCFG_GLOBAL },
585: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 586: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 587: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
588: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
589: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.372 dtucker 590: { "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
591: { "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
1.184 dtucker 592: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 593: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 594: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 595: { "usedns", sUseDNS, SSHCFG_GLOBAL },
596: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
597: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 598: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
599: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 600: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 601: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 602: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 603: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.332 djm 604: { "setenv", sSetEnv, SSHCFG_ALL },
1.209 djm 605: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 606: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 607: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 608: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 609: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.330 djm 610: { "permitlisten", sPermitListen, SSHCFG_ALL },
1.158 dtucker 611: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 612: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 613: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 614: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
615: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 616: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 617: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.360 djm 618: { "include", sInclude, SSHCFG_ALL },
1.213 djm 619: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 620: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
621: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 622: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
623: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 624: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 625: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 626: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
627: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
628: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 629: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 630: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 631: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 632: { "rdomain", sRDomain, SSHCFG_ALL },
1.342 djm 633: { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
1.355 djm 634: { "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
1.153 dtucker 635: { NULL, sBadOption, 0 }
1.1 deraadt 636: };
637:
1.182 dtucker 638: static struct {
639: int val;
640: char *text;
641: } tunmode_desc[] = {
642: { SSH_TUNMODE_NO, "no" },
643: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
644: { SSH_TUNMODE_ETHERNET, "ethernet" },
645: { SSH_TUNMODE_YES, "yes" },
646: { -1, NULL }
647: };
648:
1.329 djm 649: /* Returns an opcode name from its number */
650:
651: static const char *
652: lookup_opcode_name(ServerOpCodes code)
653: {
654: u_int i;
655:
656: for (i = 0; keywords[i].name != NULL; i++)
657: if (keywords[i].opcode == code)
658: return(keywords[i].name);
659: return "UNKNOWN";
660: }
661:
662:
1.27 markus 663: /*
1.73 stevesk 664: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 665: */
1.1 deraadt 666:
1.34 markus 667: static ServerOpCodes
1.25 markus 668: parse_token(const char *cp, const char *filename,
1.153 dtucker 669: int linenum, u_int *flags)
1.1 deraadt 670: {
1.55 markus 671: u_int i;
1.1 deraadt 672:
1.25 markus 673: for (i = 0; keywords[i].name; i++)
1.153 dtucker 674: if (strcasecmp(cp, keywords[i].name) == 0) {
675: *flags = keywords[i].flags;
1.25 markus 676: return keywords[i].opcode;
1.153 dtucker 677: }
1.25 markus 678:
1.78 stevesk 679: error("%s: line %d: Bad configuration option: %s",
680: filename, linenum, cp);
1.25 markus 681: return sBadOption;
1.1 deraadt 682: }
683:
1.202 djm 684: char *
685: derelativise_path(const char *path)
686: {
1.259 deraadt 687: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 688:
1.257 djm 689: if (strcasecmp(path, "none") == 0)
690: return xstrdup("none");
1.202 djm 691: expanded = tilde_expand_filename(path, getuid());
1.343 djm 692: if (path_absolute(expanded))
1.202 djm 693: return expanded;
1.207 djm 694: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.371 djm 695: fatal_f("getcwd: %s", strerror(errno));
1.202 djm 696: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 697: free(expanded);
1.202 djm 698: return ret;
699: }
700:
1.84 itojun 701: static void
1.315 djm 702: add_listen_addr(ServerOptions *options, const char *addr,
703: const char *rdomain, int port)
1.74 stevesk 704: {
1.142 djm 705: u_int i;
1.74 stevesk 706:
1.315 djm 707: if (port > 0)
708: add_one_listen_addr(options, addr, rdomain, port);
709: else {
710: for (i = 0; i < options->num_ports; i++) {
711: add_one_listen_addr(options, addr, rdomain,
712: options->ports[i]);
713: }
714: }
1.74 stevesk 715: }
716:
1.84 itojun 717: static void
1.315 djm 718: add_one_listen_addr(ServerOptions *options, const char *addr,
719: const char *rdomain, int port)
1.29 markus 720: {
721: struct addrinfo hints, *ai, *aitop;
722: char strport[NI_MAXSERV];
723: int gaierr;
1.315 djm 724: u_int i;
725:
726: /* Find listen_addrs entry for this rdomain */
727: for (i = 0; i < options->num_listen_addrs; i++) {
728: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
729: break;
730: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
731: continue;
732: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
733: break;
734: }
735: if (i >= options->num_listen_addrs) {
736: /* No entry for this rdomain; allocate one */
737: if (i >= INT_MAX)
1.371 djm 738: fatal_f("too many listen addresses");
1.315 djm 739: options->listen_addrs = xrecallocarray(options->listen_addrs,
740: options->num_listen_addrs, options->num_listen_addrs + 1,
741: sizeof(*options->listen_addrs));
742: i = options->num_listen_addrs++;
743: if (rdomain != NULL)
744: options->listen_addrs[i].rdomain = xstrdup(rdomain);
745: }
746: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 747:
1.74 stevesk 748: memset(&hints, 0, sizeof(hints));
1.138 djm 749: hints.ai_family = options->address_family;
1.74 stevesk 750: hints.ai_socktype = SOCK_STREAM;
751: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 752: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 753: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
754: fatal("bad addr or host: %s (%s)",
755: addr ? addr : "<NULL>",
1.173 dtucker 756: ssh_gai_strerror(gaierr));
1.74 stevesk 757: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
758: ;
1.315 djm 759: ai->ai_next = options->listen_addrs[i].addrs;
760: options->listen_addrs[i].addrs = aitop;
761: }
762:
763: /* Returns nonzero if the routing domain name is valid */
764: static int
765: valid_rdomain(const char *name)
766: {
767: const char *errstr;
768: long long num;
769: struct rt_tableinfo info;
770: int mib[6];
771: size_t miblen = sizeof(mib);
772:
773: if (name == NULL)
774: return 1;
775:
776: num = strtonum(name, 0, 255, &errstr);
777: if (errstr != NULL)
778: return 0;
779:
780: /* Check whether the table actually exists */
781: memset(mib, 0, sizeof(mib));
782: mib[0] = CTL_NET;
783: mib[1] = PF_ROUTE;
784: mib[4] = NET_RT_TABLE;
785: mib[5] = (int)num;
786: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
787: return 0;
788:
789: return 1;
1.29 markus 790: }
791:
1.266 dtucker 792: /*
793: * Queue a ListenAddress to be processed once we have all of the Ports
794: * and AddressFamily options.
795: */
796: static void
1.315 djm 797: queue_listen_addr(ServerOptions *options, const char *addr,
798: const char *rdomain, int port)
1.266 dtucker 799: {
1.315 djm 800: struct queued_listenaddr *qla;
801:
802: options->queued_listen_addrs = xrecallocarray(
803: options->queued_listen_addrs,
804: options->num_queued_listens, options->num_queued_listens + 1,
805: sizeof(*options->queued_listen_addrs));
806: qla = &options->queued_listen_addrs[options->num_queued_listens++];
807: qla->addr = xstrdup(addr);
808: qla->port = port;
809: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 810: }
811:
812: /*
813: * Process queued (text) ListenAddress entries.
814: */
815: static void
816: process_queued_listen_addrs(ServerOptions *options)
817: {
818: u_int i;
1.315 djm 819: struct queued_listenaddr *qla;
1.266 dtucker 820:
821: if (options->num_ports == 0)
822: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
823: if (options->address_family == -1)
824: options->address_family = AF_UNSPEC;
825:
826: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 827: qla = &options->queued_listen_addrs[i];
828: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
829: free(qla->addr);
830: free(qla->rdomain);
1.266 dtucker 831: }
832: free(options->queued_listen_addrs);
833: options->queued_listen_addrs = NULL;
834: options->num_queued_listens = 0;
835: }
836:
1.310 djm 837: /*
1.329 djm 838: * Inform channels layer of permitopen options for a single forwarding
839: * direction (local/remote).
1.310 djm 840: */
1.329 djm 841: static void
842: process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
843: char **opens, u_int num_opens)
1.310 djm 844: {
845: u_int i;
846: int port;
1.383 dtucker 847: char *host, *arg, *oarg;
1.329 djm 848: int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
849: const char *what = lookup_opcode_name(opcode);
1.310 djm 850:
1.329 djm 851: channel_clear_permission(ssh, FORWARD_ADM, where);
852: if (num_opens == 0)
1.310 djm 853: return; /* permit any */
854:
855: /* handle keywords: "any" / "none" */
1.329 djm 856: if (num_opens == 1 && strcmp(opens[0], "any") == 0)
1.310 djm 857: return;
1.329 djm 858: if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
859: channel_disable_admin(ssh, where);
1.310 djm 860: return;
861: }
862: /* Otherwise treat it as a list of permitted host:port */
1.329 djm 863: for (i = 0; i < num_opens; i++) {
864: oarg = arg = xstrdup(opens[i]);
1.383 dtucker 865: host = hpdelim(&arg);
866: if (host == NULL)
1.371 djm 867: fatal_f("missing host in %s", what);
1.310 djm 868: host = cleanhostname(host);
869: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.371 djm 870: fatal_f("bad port number in %s", what);
1.310 djm 871: /* Send it to channels layer */
1.329 djm 872: channel_add_permission(ssh, FORWARD_ADM,
873: where, host, port);
1.310 djm 874: free(oarg);
875: }
876: }
877:
1.329 djm 878: /*
879: * Inform channels layer of permitopen options from configuration.
880: */
881: void
882: process_permitopen(struct ssh *ssh, ServerOptions *options)
883: {
884: process_permitopen_list(ssh, sPermitOpen,
885: options->permitted_opens, options->num_permitted_opens);
1.330 djm 886: process_permitopen_list(ssh, sPermitListen,
887: options->permitted_listens,
888: options->num_permitted_listens);
1.329 djm 889: }
890:
1.226 dtucker 891: struct connection_info *
1.346 djm 892: get_connection_info(struct ssh *ssh, int populate, int use_dns)
1.226 dtucker 893: {
894: static struct connection_info ci;
895:
1.346 djm 896: if (ssh == NULL || !populate)
1.226 dtucker 897: return &ci;
1.286 djm 898: ci.host = auth_get_canonical_hostname(ssh, use_dns);
899: ci.address = ssh_remote_ipaddr(ssh);
900: ci.laddress = ssh_local_ipaddr(ssh);
901: ci.lport = ssh_local_port(ssh);
1.317 djm 902: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 903: return &ci;
904: }
905:
1.153 dtucker 906: /*
907: * The strategy for the Match blocks is that the config file is parsed twice.
908: *
909: * The first time is at startup. activep is initialized to 1 and the
910: * directives in the global context are processed and acted on. Hitting a
911: * Match directive unsets activep and the directives inside the block are
912: * checked for syntax only.
913: *
914: * The second time is after a connection has been established but before
915: * authentication. activep is initialized to 2 and global config directives
916: * are ignored since they have already been processed. If the criteria in a
917: * Match block is met, activep is set and the subsequent directives
918: * processed and actioned until EOF or another Match block unsets it. Any
919: * options set are copied into the main server config.
920: *
921: * Potential additions/improvements:
1.295 djm 922: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 923: *
924: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
925: * Match Address 192.168.0.*
926: * Tag trusted
927: * Match Group wheel
928: * Tag trusted
929: * Match Tag trusted
930: * AllowTcpForwarding yes
931: * GatewayPorts clientspecified
932: * [...]
933: *
934: * - Add a PermittedChannelRequests directive
935: * Match Group shell
936: * PermittedChannelRequests session,forwarded-tcpip
937: */
938:
939: static int
1.165 dtucker 940: match_cfg_line_group(const char *grps, int line, const char *user)
941: {
942: int result = 0;
943: struct passwd *pw;
944:
945: if (user == NULL)
946: goto out;
947:
948: if ((pw = getpwnam(user)) == NULL) {
949: debug("Can't match group at line %d because user %.100s does "
950: "not exist", line, user);
951: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
952: debug("Can't Match group because user %.100s not in any group "
953: "at line %d", user, line);
1.186 djm 954: } else if (ga_match_pattern_list(grps) != 1) {
955: debug("user %.100s does not match group list %.100s at line %d",
956: user, grps, line);
1.165 dtucker 957: } else {
1.186 djm 958: debug("user %.100s matched group list %.100s at line %d", user,
959: grps, line);
1.165 dtucker 960: result = 1;
961: }
962: out:
963: ga_free();
964: return result;
965: }
966:
1.319 dtucker 967: static void
968: match_test_missing_fatal(const char *criteria, const char *attrib)
969: {
970: fatal("'Match %s' in configuration but '%s' not in connection "
971: "test specification.", criteria, attrib);
972: }
973:
1.226 dtucker 974: /*
1.230 dtucker 975: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 976: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 977: * not match.
1.226 dtucker 978: */
1.165 dtucker 979: static int
1.226 dtucker 980: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 981: {
1.243 dtucker 982: int result = 1, attributes = 0, port;
1.153 dtucker 983: char *arg, *attrib, *cp = *condition;
984:
1.226 dtucker 985: if (ci == NULL)
1.153 dtucker 986: debug3("checking syntax for 'Match %s'", cp);
987: else
1.226 dtucker 988: debug3("checking match for '%s' user %s host %s addr %s "
989: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
990: ci->host ? ci->host : "(null)",
991: ci->address ? ci->address : "(null)",
992: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 993:
994: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.380 djm 995: /* Terminate on comment */
996: if (*attrib == '#') {
997: cp = NULL; /* mark all arguments consumed */
998: break;
999: }
1000: arg = NULL;
1.243 dtucker 1001: attributes++;
1.380 djm 1002: /* Criterion "all" has no argument and must appear alone */
1.243 dtucker 1003: if (strcasecmp(attrib, "all") == 0) {
1.380 djm 1004: if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
1005: *arg != '\0' && *arg != '#')) {
1.243 dtucker 1006: error("'all' cannot be combined with other "
1007: "Match attributes");
1008: return -1;
1009: }
1.380 djm 1010: if (arg != NULL && *arg == '#')
1011: cp = NULL; /* mark all arguments consumed */
1.243 dtucker 1012: *condition = cp;
1013: return 1;
1014: }
1.380 djm 1015: /* All other criteria require an argument */
1016: if ((arg = strdelim(&cp)) == NULL ||
1017: *arg == '\0' || *arg == '#') {
1.153 dtucker 1018: error("Missing Match criteria for %s", attrib);
1019: return -1;
1020: }
1021: if (strcasecmp(attrib, "user") == 0) {
1.351 dtucker 1022: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.153 dtucker 1023: result = 0;
1024: continue;
1025: }
1.319 dtucker 1026: if (ci->user == NULL)
1027: match_test_missing_fatal("User", "user");
1.349 dtucker 1028: if (match_usergroup_pattern_list(ci->user, arg) != 1)
1.153 dtucker 1029: result = 0;
1030: else
1031: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 1032: "line %d", ci->user, arg, line);
1.165 dtucker 1033: } else if (strcasecmp(attrib, "group") == 0) {
1.351 dtucker 1034: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.226 dtucker 1035: result = 0;
1036: continue;
1037: }
1.319 dtucker 1038: if (ci->user == NULL)
1039: match_test_missing_fatal("Group", "user");
1.226 dtucker 1040: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 1041: case -1:
1042: return -1;
1043: case 0:
1044: result = 0;
1045: }
1.153 dtucker 1046: } else if (strcasecmp(attrib, "host") == 0) {
1.351 dtucker 1047: if (ci == NULL || (ci->test && ci->host == NULL)) {
1.153 dtucker 1048: result = 0;
1049: continue;
1050: }
1.319 dtucker 1051: if (ci->host == NULL)
1052: match_test_missing_fatal("Host", "host");
1.269 djm 1053: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 1054: result = 0;
1055: else
1056: debug("connection from %.100s matched 'Host "
1.226 dtucker 1057: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 1058: } else if (strcasecmp(attrib, "address") == 0) {
1.351 dtucker 1059: if (ci == NULL || (ci->test && ci->address == NULL)) {
1.369 dtucker 1060: if (addr_match_list(NULL, arg) != 0)
1061: fatal("Invalid Match address argument "
1062: "'%s' at line %d", arg, line);
1.226 dtucker 1063: result = 0;
1064: continue;
1065: }
1.319 dtucker 1066: if (ci->address == NULL)
1067: match_test_missing_fatal("Address", "addr");
1.226 dtucker 1068: switch (addr_match_list(ci->address, arg)) {
1.181 djm 1069: case 1:
1070: debug("connection from %.100s matched 'Address "
1.226 dtucker 1071: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 1072: break;
1073: case 0:
1.183 djm 1074: case -1:
1.153 dtucker 1075: result = 0;
1.181 djm 1076: break;
1.183 djm 1077: case -2:
1.181 djm 1078: return -1;
1.153 dtucker 1079: }
1.226 dtucker 1080: } else if (strcasecmp(attrib, "localaddress") == 0){
1.351 dtucker 1081: if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1.369 dtucker 1082: if (addr_match_list(NULL, arg) != 0)
1083: fatal("Invalid Match localaddress "
1084: "argument '%s' at line %d", arg,
1085: line);
1.226 dtucker 1086: result = 0;
1087: continue;
1088: }
1.319 dtucker 1089: if (ci->laddress == NULL)
1090: match_test_missing_fatal("LocalAddress",
1091: "laddr");
1.226 dtucker 1092: switch (addr_match_list(ci->laddress, arg)) {
1093: case 1:
1094: debug("connection from %.100s matched "
1095: "'LocalAddress %.100s' at line %d",
1096: ci->laddress, arg, line);
1097: break;
1098: case 0:
1099: case -1:
1100: result = 0;
1101: break;
1102: case -2:
1103: return -1;
1104: }
1105: } else if (strcasecmp(attrib, "localport") == 0) {
1106: if ((port = a2port(arg)) == -1) {
1107: error("Invalid LocalPort '%s' on Match line",
1108: arg);
1109: return -1;
1110: }
1.351 dtucker 1111: if (ci == NULL || (ci->test && ci->lport == -1)) {
1.226 dtucker 1112: result = 0;
1113: continue;
1114: }
1.319 dtucker 1115: if (ci->lport == 0)
1116: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1117: /* TODO support port lists */
1118: if (port == ci->lport)
1119: debug("connection from %.100s matched "
1120: "'LocalPort %d' at line %d",
1121: ci->laddress, port, line);
1122: else
1123: result = 0;
1.317 djm 1124: } else if (strcasecmp(attrib, "rdomain") == 0) {
1.351 dtucker 1125: if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1.317 djm 1126: result = 0;
1127: continue;
1128: }
1.351 dtucker 1129: if (ci->rdomain == NULL)
1130: match_test_missing_fatal("RDomain", "rdomain");
1.317 djm 1131: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1132: result = 0;
1133: else
1134: debug("user %.100s matched 'RDomain %.100s' at "
1135: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1136: } else {
1137: error("Unsupported Match attribute %s", attrib);
1138: return -1;
1139: }
1.243 dtucker 1140: }
1141: if (attributes == 0) {
1142: error("One or more attributes required for Match");
1143: return -1;
1.153 dtucker 1144: }
1.226 dtucker 1145: if (ci != NULL)
1.153 dtucker 1146: debug3("match %sfound", result ? "" : "not ");
1147: *condition = cp;
1148: return result;
1149: }
1150:
1.158 dtucker 1151: #define WHITESPACE " \t\r\n"
1152:
1.220 djm 1153: /* Multistate option parsing */
1154: struct multistate {
1155: char *key;
1156: int value;
1157: };
1.320 djm 1158: static const struct multistate multistate_flag[] = {
1159: { "yes", 1 },
1160: { "no", 0 },
1161: { NULL, -1 }
1162: };
1.363 djm 1163: static const struct multistate multistate_ignore_rhosts[] = {
1164: { "yes", IGNORE_RHOSTS_YES },
1165: { "no", IGNORE_RHOSTS_NO },
1166: { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1167: { NULL, -1 }
1168: };
1.220 djm 1169: static const struct multistate multistate_addressfamily[] = {
1170: { "inet", AF_INET },
1171: { "inet6", AF_INET6 },
1172: { "any", AF_UNSPEC },
1173: { NULL, -1 }
1174: };
1175: static const struct multistate multistate_permitrootlogin[] = {
1176: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1177: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1178: { "forced-commands-only", PERMIT_FORCED_ONLY },
1179: { "yes", PERMIT_YES },
1180: { "no", PERMIT_NO },
1181: { NULL, -1 }
1182: };
1183: static const struct multistate multistate_compression[] = {
1.359 dtucker 1184: #ifdef WITH_ZLIB
1.337 sf 1185: { "yes", COMP_DELAYED },
1186: { "delayed", COMP_DELAYED },
1.359 dtucker 1187: #endif
1.220 djm 1188: { "no", COMP_NONE },
1189: { NULL, -1 }
1190: };
1191: static const struct multistate multistate_gatewayports[] = {
1192: { "clientspecified", 2 },
1193: { "yes", 1 },
1194: { "no", 0 },
1.222 djm 1195: { NULL, -1 }
1196: };
1.233 djm 1197: static const struct multistate multistate_tcpfwd[] = {
1198: { "yes", FORWARD_ALLOW },
1199: { "all", FORWARD_ALLOW },
1200: { "no", FORWARD_DENY },
1201: { "remote", FORWARD_REMOTE },
1202: { "local", FORWARD_LOCAL },
1203: { NULL, -1 }
1204: };
1.220 djm 1205:
1.360 djm 1206: static int
1207: process_server_config_line_depth(ServerOptions *options, char *line,
1.226 dtucker 1208: const char *filename, int linenum, int *activep,
1.365 djm 1209: struct connection_info *connectinfo, int *inc_flags, int depth,
1.360 djm 1210: struct include_list *includes)
1.1 deraadt 1211: {
1.383 dtucker 1212: char *str, ***chararrayptr, **charptr, *arg, *arg2, *p, *keyword;
1.360 djm 1213: int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1.174 dtucker 1214: SyslogFacility *log_facility_ptr;
1215: LogLevel *log_level_ptr;
1.25 markus 1216: ServerOpCodes opcode;
1.329 djm 1217: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1218: size_t len;
1.237 dtucker 1219: long long val64;
1.220 djm 1220: const struct multistate *multistate_ptr;
1.322 dtucker 1221: const char *errstr;
1.360 djm 1222: struct include_item *item;
1223: glob_t gbuf;
1.380 djm 1224: char **oav = NULL, **av;
1225: int oac = 0, ac;
1226: int ret = -1;
1.303 djm 1227:
1228: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1229: if ((len = strlen(line)) == 0)
1230: return 0;
1231: for (len--; len > 0; len--) {
1232: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1233: break;
1234: line[len] = '\0';
1235: }
1.25 markus 1236:
1.380 djm 1237: str = line;
1238: if ((keyword = strdelim(&str)) == NULL)
1.147 djm 1239: return 0;
1.94 markus 1240: /* Ignore leading whitespace */
1.380 djm 1241: if (*keyword == '\0')
1242: keyword = strdelim(&str);
1243: if (!keyword || !*keyword || *keyword == '#')
1.94 markus 1244: return 0;
1.380 djm 1245: if (str == NULL || *str == '\0') {
1246: error("%s line %d: no argument after keyword \"%s\"",
1247: filename, linenum, keyword);
1248: return -1;
1249: }
1.94 markus 1250: intptr = NULL;
1251: charptr = NULL;
1.380 djm 1252: opcode = parse_token(keyword, filename, linenum, &flags);
1253:
1254: if (argv_split(str, &oac, &oav, 1) != 0) {
1255: error("%s line %d: invalid quotes", filename, linenum);
1256: return -1;
1257: }
1258: ac = oac;
1259: av = oav;
1.153 dtucker 1260:
1261: if (activep == NULL) { /* We are processing a command line directive */
1262: cmdline = 1;
1263: activep = &cmdline;
1264: }
1.360 djm 1265: if (*activep && opcode != sMatch && opcode != sInclude)
1.380 djm 1266: debug3("%s:%d setting %s %s", filename, linenum, keyword, str);
1.153 dtucker 1267: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1268: if (connectinfo == NULL) {
1.153 dtucker 1269: fatal("%s line %d: Directive '%s' is not allowed "
1.380 djm 1270: "within a Match block", filename, linenum, keyword);
1.153 dtucker 1271: } else { /* this is a directive we have already processed */
1.380 djm 1272: ret = 0;
1273: goto out;
1.153 dtucker 1274: }
1275: }
1276:
1.94 markus 1277: switch (opcode) {
1278: case sBadOption:
1.380 djm 1279: goto out;
1.94 markus 1280: case sPort:
1281: /* ignore ports from configfile if cmdline specifies ports */
1.380 djm 1282: if (options->ports_from_cmdline) {
1283: argv_consume(&ac);
1284: break;
1285: }
1.94 markus 1286: if (options->num_ports >= MAX_PORTS)
1287: fatal("%s line %d: too many ports.",
1288: filename, linenum);
1.380 djm 1289: arg = argv_next(&ac, &av);
1.94 markus 1290: if (!arg || *arg == '\0')
1291: fatal("%s line %d: missing port number.",
1292: filename, linenum);
1293: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1294: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1295: fatal("%s line %d: Badly formatted port number.",
1296: filename, linenum);
1297: break;
1.29 markus 1298:
1.94 markus 1299: case sLoginGraceTime:
1300: intptr = &options->login_grace_time;
1.180 djm 1301: parse_time:
1.380 djm 1302: arg = argv_next(&ac, &av);
1.94 markus 1303: if (!arg || *arg == '\0')
1304: fatal("%s line %d: missing time value.",
1305: filename, linenum);
1306: if ((value = convtime(arg)) == -1)
1307: fatal("%s line %d: invalid time value.",
1308: filename, linenum);
1.268 djm 1309: if (*activep && *intptr == -1)
1.94 markus 1310: *intptr = value;
1311: break;
1312:
1313: case sListenAddress:
1.380 djm 1314: arg = argv_next(&ac, &av);
1.139 djm 1315: if (arg == NULL || *arg == '\0')
1316: fatal("%s line %d: missing address",
1.94 markus 1317: filename, linenum);
1.144 dtucker 1318: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1319: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1320: && strchr(p+1, ':') != NULL) {
1.315 djm 1321: port = 0;
1322: p = arg;
1323: } else {
1.347 dtucker 1324: arg2 = NULL;
1.383 dtucker 1325: p = hpdelim(&arg);
1326: if (p == NULL)
1.315 djm 1327: fatal("%s line %d: bad address:port usage",
1328: filename, linenum);
1329: p = cleanhostname(p);
1330: if (arg == NULL)
1331: port = 0;
1332: else if ((port = a2port(arg)) <= 0)
1333: fatal("%s line %d: bad port number",
1334: filename, linenum);
1335: }
1336: /* Optional routing table */
1337: arg2 = NULL;
1.380 djm 1338: if ((arg = argv_next(&ac, &av)) != NULL) {
1.315 djm 1339: if (strcmp(arg, "rdomain") != 0 ||
1.380 djm 1340: (arg2 = argv_next(&ac, &av)) == NULL)
1.315 djm 1341: fatal("%s line %d: bad ListenAddress syntax",
1342: filename, linenum);
1343: if (!valid_rdomain(arg2))
1344: fatal("%s line %d: bad routing domain",
1345: filename, linenum);
1.144 dtucker 1346: }
1.315 djm 1347: queue_listen_addr(options, p, arg2, port);
1.25 markus 1348:
1.138 djm 1349: break;
1350:
1351: case sAddressFamily:
1.220 djm 1352: intptr = &options->address_family;
1353: multistate_ptr = multistate_addressfamily;
1354: parse_multistate:
1.380 djm 1355: arg = argv_next(&ac, &av);
1.141 markus 1356: if (!arg || *arg == '\0')
1.220 djm 1357: fatal("%s line %d: missing argument.",
1.141 markus 1358: filename, linenum);
1.220 djm 1359: value = -1;
1360: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1361: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1362: value = multistate_ptr[i].value;
1363: break;
1364: }
1365: }
1366: if (value == -1)
1367: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1368: filename, linenum, arg);
1.220 djm 1369: if (*activep && *intptr == -1)
1.138 djm 1370: *intptr = value;
1.94 markus 1371: break;
1372:
1373: case sHostKeyFile:
1.380 djm 1374: arg = argv_next(&ac, &av);
1.94 markus 1375: if (!arg || *arg == '\0')
1376: fatal("%s line %d: missing file name.",
1377: filename, linenum);
1.344 djm 1378: if (*activep) {
1379: servconf_add_hostkey(filename, linenum,
1380: options, arg, 1);
1381: }
1.94 markus 1382: break;
1.76 stevesk 1383:
1.240 markus 1384: case sHostKeyAgent:
1385: charptr = &options->host_key_agent;
1.380 djm 1386: arg = argv_next(&ac, &av);
1.240 markus 1387: if (!arg || *arg == '\0')
1388: fatal("%s line %d: missing socket name.",
1389: filename, linenum);
1390: if (*activep && *charptr == NULL)
1391: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1392: xstrdup(arg) : derelativise_path(arg);
1393: break;
1394:
1.203 djm 1395: case sHostCertificate:
1.380 djm 1396: arg = argv_next(&ac, &av);
1.314 djm 1397: if (!arg || *arg == '\0')
1398: fatal("%s line %d: missing file name.",
1399: filename, linenum);
1400: if (*activep)
1401: servconf_add_hostcert(filename, linenum, options, arg);
1402: break;
1.203 djm 1403:
1.94 markus 1404: case sPidFile:
1405: charptr = &options->pid_file;
1.314 djm 1406: parse_filename:
1.380 djm 1407: arg = argv_next(&ac, &av);
1.314 djm 1408: if (!arg || *arg == '\0')
1409: fatal("%s line %d: missing file name.",
1410: filename, linenum);
1411: if (*activep && *charptr == NULL) {
1412: *charptr = derelativise_path(arg);
1413: /* increase optional counter */
1414: if (intptr != NULL)
1415: *intptr = *intptr + 1;
1416: }
1417: break;
1.25 markus 1418:
1.378 dtucker 1419: case sModuliFile:
1420: charptr = &options->moduli_file;
1421: goto parse_filename;
1422:
1.94 markus 1423: case sPermitRootLogin:
1424: intptr = &options->permit_root_login;
1.220 djm 1425: multistate_ptr = multistate_permitrootlogin;
1426: goto parse_multistate;
1.36 markus 1427:
1.94 markus 1428: case sIgnoreRhosts:
1429: intptr = &options->ignore_rhosts;
1.363 djm 1430: multistate_ptr = multistate_ignore_rhosts;
1.320 djm 1431: goto parse_multistate;
1.94 markus 1432:
1433: case sIgnoreUserKnownHosts:
1434: intptr = &options->ignore_user_known_hosts;
1.363 djm 1435: parse_flag:
1436: multistate_ptr = multistate_flag;
1437: goto parse_multistate;
1.94 markus 1438:
1439: case sHostbasedAuthentication:
1440: intptr = &options->hostbased_authentication;
1441: goto parse_flag;
1442:
1443: case sHostbasedUsesNameFromPacketOnly:
1444: intptr = &options->hostbased_uses_name_from_packet_only;
1445: goto parse_flag;
1446:
1.375 dtucker 1447: case sHostbasedAcceptedAlgorithms:
1448: charptr = &options->hostbased_accepted_algos;
1.374 dtucker 1449: parse_pubkey_algos:
1.380 djm 1450: arg = argv_next(&ac, &av);
1.258 djm 1451: if (!arg || *arg == '\0')
1452: fatal("%s line %d: Missing argument.",
1453: filename, linenum);
1.304 djm 1454: if (*arg != '-' &&
1.352 naddy 1455: !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1456: arg + 1 : arg, 1))
1.258 djm 1457: fatal("%s line %d: Bad key types '%s'.",
1458: filename, linenum, arg ? arg : "<NONE>");
1459: if (*activep && *charptr == NULL)
1460: *charptr = xstrdup(arg);
1461: break;
1462:
1.276 markus 1463: case sHostKeyAlgorithms:
1464: charptr = &options->hostkeyalgorithms;
1.374 dtucker 1465: goto parse_pubkey_algos;
1.276 markus 1466:
1.341 djm 1467: case sCASignatureAlgorithms:
1468: charptr = &options->ca_sign_algorithms;
1.374 dtucker 1469: goto parse_pubkey_algos;
1.341 djm 1470:
1.94 markus 1471: case sPubkeyAuthentication:
1472: intptr = &options->pubkey_authentication;
1473: goto parse_flag;
1.119 jakob 1474:
1.374 dtucker 1475: case sPubkeyAcceptedAlgorithms:
1476: charptr = &options->pubkey_accepted_algos;
1477: goto parse_pubkey_algos;
1.258 djm 1478:
1.354 djm 1479: case sPubkeyAuthOptions:
1480: intptr = &options->pubkey_auth_options;
1481: value = 0;
1.380 djm 1482: while ((arg = argv_next(&ac, &av)) != NULL) {
1.354 djm 1483: if (strcasecmp(arg, "none") == 0)
1484: continue;
1485: if (strcasecmp(arg, "touch-required") == 0)
1486: value |= PUBKEYAUTH_TOUCH_REQUIRED;
1.368 djm 1487: else if (strcasecmp(arg, "verify-required") == 0)
1488: value |= PUBKEYAUTH_VERIFY_REQUIRED;
1.354 djm 1489: else {
1.380 djm 1490: error("%s line %d: unsupported %s option %s",
1491: filename, linenum, keyword, arg);
1492: goto out;
1.354 djm 1493: }
1494: }
1495: if (*activep && *intptr == -1)
1496: *intptr = value;
1497: break;
1498:
1.94 markus 1499: case sKerberosAuthentication:
1500: intptr = &options->kerberos_authentication;
1501: goto parse_flag;
1502:
1503: case sKerberosOrLocalPasswd:
1504: intptr = &options->kerberos_or_local_passwd;
1505: goto parse_flag;
1506:
1507: case sKerberosTicketCleanup:
1508: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1509: goto parse_flag;
1510:
1511: case sKerberosGetAFSToken:
1512: intptr = &options->kerberos_get_afs_token;
1.125 markus 1513: goto parse_flag;
1514:
1515: case sGssAuthentication:
1516: intptr = &options->gss_authentication;
1517: goto parse_flag;
1518:
1519: case sGssCleanupCreds:
1520: intptr = &options->gss_cleanup_creds;
1.271 djm 1521: goto parse_flag;
1522:
1523: case sGssStrictAcceptor:
1524: intptr = &options->gss_strict_acceptor;
1.94 markus 1525: goto parse_flag;
1526:
1527: case sPasswordAuthentication:
1528: intptr = &options->password_authentication;
1529: goto parse_flag;
1530:
1531: case sKbdInteractiveAuthentication:
1532: intptr = &options->kbd_interactive_authentication;
1533: goto parse_flag;
1534:
1535: case sPrintMotd:
1536: intptr = &options->print_motd;
1537: goto parse_flag;
1538:
1539: case sPrintLastLog:
1540: intptr = &options->print_lastlog;
1541: goto parse_flag;
1542:
1543: case sX11Forwarding:
1544: intptr = &options->x11_forwarding;
1545: goto parse_flag;
1546:
1547: case sX11DisplayOffset:
1548: intptr = &options->x11_display_offset;
1.293 naddy 1549: parse_int:
1.380 djm 1550: arg = argv_next(&ac, &av);
1.322 dtucker 1551: if ((errstr = atoi_err(arg, &value)) != NULL)
1.380 djm 1552: fatal("%s line %d: %s integer value %s.",
1553: filename, linenum, keyword, errstr);
1.293 naddy 1554: if (*activep && *intptr == -1)
1555: *intptr = value;
1556: break;
1.99 stevesk 1557:
1558: case sX11UseLocalhost:
1559: intptr = &options->x11_use_localhost;
1560: goto parse_flag;
1.94 markus 1561:
1562: case sXAuthLocation:
1563: charptr = &options->xauth_location;
1564: goto parse_filename;
1565:
1.244 djm 1566: case sPermitTTY:
1567: intptr = &options->permit_tty;
1568: goto parse_flag;
1569:
1.250 djm 1570: case sPermitUserRC:
1571: intptr = &options->permit_user_rc;
1572: goto parse_flag;
1573:
1.94 markus 1574: case sStrictModes:
1575: intptr = &options->strict_modes;
1576: goto parse_flag;
1577:
1.129 markus 1578: case sTCPKeepAlive:
1579: intptr = &options->tcp_keep_alive;
1.94 markus 1580: goto parse_flag;
1581:
1582: case sEmptyPasswd:
1583: intptr = &options->permit_empty_passwd;
1.113 markus 1584: goto parse_flag;
1585:
1586: case sPermitUserEnvironment:
1587: intptr = &options->permit_user_env;
1.367 djm 1588: charptr = &options->permit_user_env_allowlist;
1.380 djm 1589: arg = argv_next(&ac, &av);
1.334 djm 1590: if (!arg || *arg == '\0')
1.380 djm 1591: fatal("%s line %d: %s missing argument.",
1592: filename, linenum, keyword);
1.334 djm 1593: value = 0;
1594: p = NULL;
1595: if (strcmp(arg, "yes") == 0)
1596: value = 1;
1597: else if (strcmp(arg, "no") == 0)
1598: value = 0;
1599: else {
1600: /* Pattern-list specified */
1601: value = 1;
1602: p = xstrdup(arg);
1603: }
1604: if (*activep && *intptr == -1) {
1605: *intptr = value;
1606: *charptr = p;
1607: p = NULL;
1608: }
1609: free(p);
1610: break;
1.94 markus 1611:
1.111 markus 1612: case sCompression:
1613: intptr = &options->compression;
1.220 djm 1614: multistate_ptr = multistate_compression;
1615: goto parse_multistate;
1.94 markus 1616:
1.235 dtucker 1617: case sRekeyLimit:
1.380 djm 1618: arg = argv_next(&ac, &av);
1.235 dtucker 1619: if (!arg || *arg == '\0')
1.380 djm 1620: fatal("%s line %d: %s missing argument.",
1621: filename, linenum, keyword);
1.235 dtucker 1622: if (strcmp(arg, "default") == 0) {
1623: val64 = 0;
1624: } else {
1.236 dtucker 1625: if (scan_scaled(arg, &val64) == -1)
1.380 djm 1626: fatal("%.200s line %d: Bad %s number '%s': %s",
1627: filename, linenum, keyword,
1628: arg, strerror(errno));
1.235 dtucker 1629: if (val64 != 0 && val64 < 16)
1.380 djm 1630: fatal("%.200s line %d: %s too small",
1631: filename, linenum, keyword);
1.235 dtucker 1632: }
1633: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1634: options->rekey_limit = val64;
1.380 djm 1635: if (ac != 0) { /* optional rekey interval present */
1636: if (strcmp(av[0], "none") == 0) {
1637: (void)argv_next(&ac, &av); /* discard */
1.235 dtucker 1638: break;
1639: }
1640: intptr = &options->rekey_interval;
1641: goto parse_time;
1642: }
1643: break;
1644:
1.94 markus 1645: case sGatewayPorts:
1.251 millert 1646: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1647: multistate_ptr = multistate_gatewayports;
1648: goto parse_multistate;
1.25 markus 1649:
1.122 markus 1650: case sUseDNS:
1651: intptr = &options->use_dns;
1.94 markus 1652: goto parse_flag;
1.53 markus 1653:
1.94 markus 1654: case sLogFacility:
1.174 dtucker 1655: log_facility_ptr = &options->log_facility;
1.380 djm 1656: arg = argv_next(&ac, &av);
1.94 markus 1657: value = log_facility_number(arg);
1.101 markus 1658: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1659: fatal("%.200s line %d: unsupported log facility '%s'",
1660: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1661: if (*log_facility_ptr == -1)
1662: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1663: break;
1.25 markus 1664:
1.94 markus 1665: case sLogLevel:
1.174 dtucker 1666: log_level_ptr = &options->log_level;
1.380 djm 1667: arg = argv_next(&ac, &av);
1.94 markus 1668: value = log_level_number(arg);
1.101 markus 1669: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1670: fatal("%.200s line %d: unsupported log level '%s'",
1671: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1672: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1673: *log_level_ptr = (LogLevel) value;
1.94 markus 1674: break;
1675:
1.370 djm 1676: case sLogVerbose:
1.380 djm 1677: found = options->num_log_verbose == 0;
1678: i = 0;
1679: while ((arg = argv_next(&ac, &av)) != NULL) {
1680: if (*arg == '\0') {
1681: error("%s line %d: keyword %s empty argument",
1682: filename, linenum, keyword);
1683: goto out;
1684: }
1685: /* Allow "none" only in first position */
1686: if (strcasecmp(arg, "none") == 0) {
1687: if (i > 0 || ac > 0) {
1688: error("%s line %d: keyword %s \"none\" "
1689: "argument must appear alone.",
1690: filename, linenum, keyword);
1691: goto out;
1692: }
1693: }
1694: i++;
1695: if (!found || !*activep)
1.370 djm 1696: continue;
1.380 djm 1697: opt_array_append(filename, linenum, keyword,
1.370 djm 1698: &options->log_verbose, &options->num_log_verbose,
1699: arg);
1700: }
1701: break;
1702:
1.94 markus 1703: case sAllowTcpForwarding:
1704: intptr = &options->allow_tcp_forwarding;
1.233 djm 1705: multistate_ptr = multistate_tcpfwd;
1706: goto parse_multistate;
1.102 provos 1707:
1.251 millert 1708: case sAllowStreamLocalForwarding:
1709: intptr = &options->allow_streamlocal_forwarding;
1710: multistate_ptr = multistate_tcpfwd;
1711: goto parse_multistate;
1712:
1.178 pyr 1713: case sAllowAgentForwarding:
1714: intptr = &options->allow_agent_forwarding;
1715: goto parse_flag;
1716:
1.301 djm 1717: case sDisableForwarding:
1718: intptr = &options->disable_forwarding;
1719: goto parse_flag;
1720:
1.94 markus 1721: case sAllowUsers:
1.380 djm 1722: chararrayptr = &options->allow_users;
1723: uintptr = &options->num_allow_users;
1724: parse_allowdenyusers:
1725: while ((arg = argv_next(&ac, &av)) != NULL) {
1726: if (*arg == '\0' ||
1727: match_user(NULL, NULL, NULL, arg) == -1)
1728: fatal("%s line %d: invalid %s pattern: \"%s\"",
1729: filename, linenum, keyword, arg);
1.227 markus 1730: if (!*activep)
1731: continue;
1.380 djm 1732: opt_array_append(filename, linenum, keyword,
1733: chararrayptr, uintptr, arg);
1.94 markus 1734: }
1735: break;
1.25 markus 1736:
1.94 markus 1737: case sDenyUsers:
1.380 djm 1738: chararrayptr = &options->deny_users;
1739: uintptr = &options->num_deny_users;
1740: goto parse_allowdenyusers;
1.25 markus 1741:
1.94 markus 1742: case sAllowGroups:
1.380 djm 1743: chararrayptr = &options->allow_groups;
1744: uintptr = &options->num_allow_groups;
1745: parse_allowdenygroups:
1746: while ((arg = argv_next(&ac, &av)) != NULL) {
1747: if (*arg == '\0')
1748: fatal("%s line %d: empty %s pattern",
1749: filename, linenum, keyword);
1.227 markus 1750: if (!*activep)
1751: continue;
1.380 djm 1752: opt_array_append(filename, linenum, keyword,
1753: chararrayptr, uintptr, arg);
1.94 markus 1754: }
1755: break;
1.33 markus 1756:
1.94 markus 1757: case sDenyGroups:
1.380 djm 1758: chararrayptr = &options->deny_groups;
1759: uintptr = &options->num_deny_groups;
1760: goto parse_allowdenygroups;
1.66 markus 1761:
1.94 markus 1762: case sCiphers:
1.380 djm 1763: arg = argv_next(&ac, &av);
1.94 markus 1764: if (!arg || *arg == '\0')
1.380 djm 1765: fatal("%s line %d: %s missing argument.",
1766: filename, linenum, keyword);
1.352 naddy 1767: if (*arg != '-' &&
1768: !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1769: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1770: filename, linenum, arg ? arg : "<NONE>");
1771: if (options->ciphers == NULL)
1772: options->ciphers = xstrdup(arg);
1773: break;
1.33 markus 1774:
1.94 markus 1775: case sMacs:
1.380 djm 1776: arg = argv_next(&ac, &av);
1.94 markus 1777: if (!arg || *arg == '\0')
1.380 djm 1778: fatal("%s line %d: %s missing argument.",
1779: filename, linenum, keyword);
1.352 naddy 1780: if (*arg != '-' &&
1781: !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1782: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1783: filename, linenum, arg ? arg : "<NONE>");
1784: if (options->macs == NULL)
1785: options->macs = xstrdup(arg);
1.211 djm 1786: break;
1787:
1788: case sKexAlgorithms:
1.380 djm 1789: arg = argv_next(&ac, &av);
1.211 djm 1790: if (!arg || *arg == '\0')
1.380 djm 1791: fatal("%s line %d: %s missing argument.",
1792: filename, linenum, keyword);
1.304 djm 1793: if (*arg != '-' &&
1.352 naddy 1794: !kex_names_valid(*arg == '+' || *arg == '^' ?
1795: arg + 1 : arg))
1.211 djm 1796: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1797: filename, linenum, arg ? arg : "<NONE>");
1798: if (options->kex_algorithms == NULL)
1799: options->kex_algorithms = xstrdup(arg);
1.94 markus 1800: break;
1.43 jakob 1801:
1.94 markus 1802: case sSubsystem:
1803: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1804: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1805: filename, linenum);
1.94 markus 1806: }
1.380 djm 1807: arg = argv_next(&ac, &av);
1.94 markus 1808: if (!arg || *arg == '\0')
1.380 djm 1809: fatal("%s line %d: %s missing argument.",
1810: filename, linenum, keyword);
1.153 dtucker 1811: if (!*activep) {
1.380 djm 1812: arg = argv_next(&ac, &av);
1.153 dtucker 1813: break;
1814: }
1.94 markus 1815: for (i = 0; i < options->num_subsystems; i++)
1816: if (strcmp(arg, options->subsystem_name[i]) == 0)
1.380 djm 1817: fatal("%s line %d: Subsystem '%s' "
1818: "already defined.", filename, linenum, arg);
1.94 markus 1819: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1.380 djm 1820: arg = argv_next(&ac, &av);
1.94 markus 1821: if (!arg || *arg == '\0')
1822: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1823: filename, linenum);
1.94 markus 1824: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1825:
1826: /* Collect arguments (separate to executable) */
1827: p = xstrdup(arg);
1828: len = strlen(p) + 1;
1.380 djm 1829: while ((arg = argv_next(&ac, &av)) != NULL) {
1.151 djm 1830: len += 1 + strlen(arg);
1.264 deraadt 1831: p = xreallocarray(p, 1, len);
1.151 djm 1832: strlcat(p, " ", len);
1833: strlcat(p, arg, len);
1834: }
1835: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1836: options->num_subsystems++;
1837: break;
1.46 markus 1838:
1.94 markus 1839: case sMaxStartups:
1.380 djm 1840: arg = argv_next(&ac, &av);
1.94 markus 1841: if (!arg || *arg == '\0')
1.380 djm 1842: fatal("%s line %d: %s missing argument.",
1843: filename, linenum, keyword);
1.94 markus 1844: if ((n = sscanf(arg, "%d:%d:%d",
1845: &options->max_startups_begin,
1846: &options->max_startups_rate,
1847: &options->max_startups)) == 3) {
1848: if (options->max_startups_begin >
1849: options->max_startups ||
1850: options->max_startups_rate > 100 ||
1851: options->max_startups_rate < 1)
1.380 djm 1852: fatal("%s line %d: Invalid %s spec.",
1853: filename, linenum, keyword);
1.94 markus 1854: } else if (n != 1)
1.380 djm 1855: fatal("%s line %d: Invalid %s spec.",
1856: filename, linenum, keyword);
1.94 markus 1857: else
1858: options->max_startups = options->max_startups_begin;
1859: break;
1.133 dtucker 1860:
1.372 dtucker 1861: case sPerSourceNetBlockSize:
1.380 djm 1862: arg = argv_next(&ac, &av);
1.372 dtucker 1863: if (!arg || *arg == '\0')
1.380 djm 1864: fatal("%s line %d: %s missing argument.",
1865: filename, linenum, keyword);
1.372 dtucker 1866: switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
1867: case 2:
1868: if (value2 < 0 || value2 > 128)
1869: n = -1;
1870: /* FALLTHROUGH */
1871: case 1:
1872: if (value < 0 || value > 32)
1873: n = -1;
1874: }
1875: if (n != 1 && n != 2)
1.380 djm 1876: fatal("%s line %d: Invalid %s spec.",
1877: filename, linenum, keyword);
1.372 dtucker 1878: if (*activep) {
1879: options->per_source_masklen_ipv4 = value;
1880: options->per_source_masklen_ipv6 = value2;
1881: }
1882: break;
1883:
1884: case sPerSourceMaxStartups:
1.380 djm 1885: arg = argv_next(&ac, &av);
1.372 dtucker 1886: if (!arg || *arg == '\0')
1.380 djm 1887: fatal("%s line %d: %s missing argument.",
1888: filename, linenum, keyword);
1.372 dtucker 1889: if (strcmp(arg, "none") == 0) { /* no limit */
1890: value = INT_MAX;
1891: } else {
1892: if ((errstr = atoi_err(arg, &value)) != NULL)
1.380 djm 1893: fatal("%s line %d: %s integer value %s.",
1894: filename, linenum, keyword, errstr);
1.372 dtucker 1895: }
1896: if (*activep)
1897: options->per_source_max_startups = value;
1898: break;
1899:
1.133 dtucker 1900: case sMaxAuthTries:
1901: intptr = &options->max_authtries;
1902: goto parse_int;
1.94 markus 1903:
1.180 djm 1904: case sMaxSessions:
1905: intptr = &options->max_sessions;
1906: goto parse_int;
1907:
1.94 markus 1908: case sBanner:
1909: charptr = &options->banner;
1910: goto parse_filename;
1.176 djm 1911:
1.94 markus 1912: /*
1913: * These options can contain %X options expanded at
1914: * connect time, so that you can specify paths like:
1915: *
1916: * AuthorizedKeysFile /etc/ssh_keys/%u
1917: */
1918: case sAuthorizedKeysFile:
1.380 djm 1919: uvalue = options->num_authkeys_files;
1920: while ((arg = argv_next(&ac, &av)) != NULL) {
1921: if (*arg == '\0') {
1922: error("%s line %d: keyword %s empty argument",
1923: filename, linenum, keyword);
1924: goto out;
1925: }
1926: arg2 = tilde_expand_filename(arg, getuid());
1927: if (*activep && uvalue == 0) {
1928: opt_array_append(filename, linenum, keyword,
1.314 djm 1929: &options->authorized_keys_files,
1.380 djm 1930: &options->num_authkeys_files, arg2);
1.219 djm 1931: }
1.380 djm 1932: free(arg2);
1.219 djm 1933: }
1.380 djm 1934: break;
1.219 djm 1935:
1.208 djm 1936: case sAuthorizedPrincipalsFile:
1937: charptr = &options->authorized_principals_file;
1.380 djm 1938: arg = argv_next(&ac, &av);
1.205 djm 1939: if (!arg || *arg == '\0')
1.380 djm 1940: fatal("%s line %d: %s missing argument.",
1941: filename, linenum, keyword);
1.205 djm 1942: if (*activep && *charptr == NULL) {
1.206 markus 1943: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1944: /* increase optional counter */
1945: if (intptr != NULL)
1946: *intptr = *intptr + 1;
1947: }
1948: break;
1.94 markus 1949:
1950: case sClientAliveInterval:
1951: intptr = &options->client_alive_interval;
1952: goto parse_time;
1953:
1954: case sClientAliveCountMax:
1955: intptr = &options->client_alive_count_max;
1956: goto parse_int;
1.131 djm 1957:
1958: case sAcceptEnv:
1.380 djm 1959: while ((arg = argv_next(&ac, &av)) != NULL) {
1960: if (*arg == '\0' || strchr(arg, '=') != NULL)
1.131 djm 1961: fatal("%s line %d: Invalid environment name.",
1962: filename, linenum);
1.153 dtucker 1963: if (!*activep)
1.227 markus 1964: continue;
1.380 djm 1965: opt_array_append(filename, linenum, keyword,
1.314 djm 1966: &options->accept_env, &options->num_accept_env,
1967: arg);
1.131 djm 1968: }
1969: break;
1.145 reyk 1970:
1.332 djm 1971: case sSetEnv:
1972: uvalue = options->num_setenv;
1.380 djm 1973: while ((arg = argv_next(&ac, &av)) != NULL) {
1974: if (*arg == '\0' || strchr(arg, '=') == NULL)
1.332 djm 1975: fatal("%s line %d: Invalid environment.",
1976: filename, linenum);
1977: if (!*activep || uvalue != 0)
1978: continue;
1.385 ! djm 1979: if (lookup_setenv_in_list(arg, options->setenv,
! 1980: options->num_setenv) != NULL) {
! 1981: debug2("%s line %d: ignoring duplicate env "
! 1982: "name \"%.64s\"", filename, linenum, arg);
! 1983: continue;
! 1984: }
1.380 djm 1985: opt_array_append(filename, linenum, keyword,
1.332 djm 1986: &options->setenv, &options->num_setenv, arg);
1987: }
1988: break;
1989:
1.145 reyk 1990: case sPermitTunnel:
1991: intptr = &options->permit_tun;
1.380 djm 1992: arg = argv_next(&ac, &av);
1.146 reyk 1993: if (!arg || *arg == '\0')
1.380 djm 1994: fatal("%s line %d: %s missing argument.",
1995: filename, linenum, keyword);
1.182 dtucker 1996: value = -1;
1997: for (i = 0; tunmode_desc[i].val != -1; i++)
1998: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1999: value = tunmode_desc[i].val;
2000: break;
2001: }
2002: if (value == -1)
1.380 djm 2003: fatal("%s line %d: bad %s argument %s",
2004: filename, linenum, keyword, arg);
1.268 djm 2005: if (*activep && *intptr == -1)
1.146 reyk 2006: *intptr = value;
2007: break;
1.94 markus 2008:
1.360 djm 2009: case sInclude:
2010: if (cmdline) {
2011: fatal("Include directive not supported as a "
2012: "command-line option");
2013: }
2014: value = 0;
1.380 djm 2015: while ((arg2 = argv_next(&ac, &av)) != NULL) {
2016: if (*arg2 == '\0') {
2017: error("%s line %d: keyword %s empty argument",
2018: filename, linenum, keyword);
2019: goto out;
2020: }
1.360 djm 2021: value++;
2022: found = 0;
2023: if (*arg2 != '/' && *arg2 != '~') {
1.361 markus 2024: xasprintf(&arg, "%s/%s", SSHDIR, arg2);
1.360 djm 2025: } else
2026: arg = xstrdup(arg2);
2027:
2028: /*
2029: * Don't let included files clobber the containing
2030: * file's Match state.
2031: */
2032: oactive = *activep;
2033:
2034: /* consult cache of include files */
2035: TAILQ_FOREACH(item, includes, entry) {
2036: if (strcmp(item->selector, arg) != 0)
2037: continue;
2038: if (item->filename != NULL) {
2039: parse_server_config_depth(options,
2040: item->filename, item->contents,
2041: includes, connectinfo,
1.365 djm 2042: (*inc_flags & SSHCFG_MATCH_ONLY
2043: ? SSHCFG_MATCH_ONLY : (oactive
2044: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2045: activep, depth + 1);
2046: }
2047: found = 1;
2048: *activep = oactive;
2049: }
2050: if (found != 0) {
2051: free(arg);
2052: continue;
2053: }
2054:
2055: /* requested glob was not in cache */
2056: debug2("%s line %d: new include %s",
2057: filename, linenum, arg);
2058: if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
2059: if (r != GLOB_NOMATCH) {
1.380 djm 2060: fatal("%s line %d: include \"%s\" glob "
2061: "failed", filename, linenum, arg);
1.360 djm 2062: }
2063: /*
2064: * If no entry matched then record a
2065: * placeholder to skip later glob calls.
2066: */
2067: debug2("%s line %d: no match for %s",
2068: filename, linenum, arg);
2069: item = xcalloc(1, sizeof(*item));
2070: item->selector = strdup(arg);
2071: TAILQ_INSERT_TAIL(includes,
2072: item, entry);
2073: }
2074: if (gbuf.gl_pathc > INT_MAX)
1.371 djm 2075: fatal_f("too many glob results");
1.360 djm 2076: for (n = 0; n < (int)gbuf.gl_pathc; n++) {
2077: debug2("%s line %d: including %s",
2078: filename, linenum, gbuf.gl_pathv[n]);
2079: item = xcalloc(1, sizeof(*item));
2080: item->selector = strdup(arg);
2081: item->filename = strdup(gbuf.gl_pathv[n]);
1.371 djm 2082: if ((item->contents = sshbuf_new()) == NULL)
2083: fatal_f("sshbuf_new failed");
1.360 djm 2084: load_server_config(item->filename,
2085: item->contents);
2086: parse_server_config_depth(options,
2087: item->filename, item->contents,
2088: includes, connectinfo,
1.365 djm 2089: (*inc_flags & SSHCFG_MATCH_ONLY
2090: ? SSHCFG_MATCH_ONLY : (oactive
2091: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2092: activep, depth + 1);
2093: *activep = oactive;
2094: TAILQ_INSERT_TAIL(includes, item, entry);
2095: }
2096: globfree(&gbuf);
2097: free(arg);
2098: }
2099: if (value == 0) {
1.380 djm 2100: fatal("%s line %d: %s missing filename argument",
2101: filename, linenum, keyword);
1.360 djm 2102: }
2103: break;
2104:
1.153 dtucker 2105: case sMatch:
2106: if (cmdline)
2107: fatal("Match directive not supported as a command-line "
1.379 djm 2108: "option");
1.380 djm 2109: value = match_cfg_line(&str, linenum,
1.365 djm 2110: (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
1.153 dtucker 2111: if (value < 0)
2112: fatal("%s line %d: Bad Match condition", filename,
2113: linenum);
1.365 djm 2114: *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
1.380 djm 2115: /*
2116: * The MATCH_ONLY flag is applicable only until the first
2117: * match block.
2118: */
1.365 djm 2119: *inc_flags &= ~SSHCFG_MATCH_ONLY;
1.380 djm 2120: /*
2121: * If match_cfg_line() didn't consume all its arguments then
2122: * arrange for the extra arguments check below to fail.
2123: */
2124: if (str == NULL || *str == '\0')
2125: argv_consume(&ac);
1.156 dtucker 2126: break;
2127:
1.330 djm 2128: case sPermitListen:
1.156 dtucker 2129: case sPermitOpen:
1.330 djm 2130: if (opcode == sPermitListen) {
2131: uintptr = &options->num_permitted_listens;
2132: chararrayptr = &options->permitted_listens;
1.329 djm 2133: } else {
2134: uintptr = &options->num_permitted_opens;
2135: chararrayptr = &options->permitted_opens;
2136: }
1.380 djm 2137: arg = argv_next(&ac, &av);
1.156 dtucker 2138: if (!arg || *arg == '\0')
1.380 djm 2139: fatal("%s line %d: %s missing argument.",
2140: filename, linenum, keyword);
1.329 djm 2141: uvalue = *uintptr; /* modified later */
1.310 djm 2142: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 djm 2143: if (*activep && uvalue == 0) {
2144: *uintptr = 1;
2145: *chararrayptr = xcalloc(1,
2146: sizeof(**chararrayptr));
2147: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 2148: }
1.156 dtucker 2149: break;
2150: }
1.380 djm 2151: for (; arg != NULL && *arg != '\0'; arg = argv_next(&ac, &av)) {
1.333 djm 2152: if (opcode == sPermitListen &&
2153: strchr(arg, ':') == NULL) {
2154: /*
2155: * Allow bare port number for PermitListen
2156: * to indicate a wildcard listen host.
2157: */
2158: xasprintf(&arg2, "*:%s", arg);
2159: } else {
2160: arg2 = xstrdup(arg);
1.383 dtucker 2161: p = hpdelim(&arg);
2162: if (p == NULL) {
1.380 djm 2163: fatal("%s line %d: %s missing host",
2164: filename, linenum, keyword);
1.333 djm 2165: }
2166: p = cleanhostname(p);
1.329 djm 2167: }
2168: if (arg == NULL ||
2169: ((port = permitopen_port(arg)) < 0)) {
1.380 djm 2170: fatal("%s line %d: %s bad port number",
2171: filename, linenum, keyword);
1.329 djm 2172: }
2173: if (*activep && uvalue == 0) {
1.380 djm 2174: opt_array_append(filename, linenum, keyword,
1.329 djm 2175: chararrayptr, uintptr, arg2);
1.314 djm 2176: }
2177: free(arg2);
1.159 dtucker 2178: }
1.153 dtucker 2179: break;
2180:
1.158 dtucker 2181: case sForceCommand:
1.380 djm 2182: if (str == NULL || *str == '\0')
2183: fatal("%s line %d: %s missing argument.",
2184: filename, linenum, keyword);
2185: len = strspn(str, WHITESPACE);
1.158 dtucker 2186: if (*activep && options->adm_forced_command == NULL)
1.380 djm 2187: options->adm_forced_command = xstrdup(str + len);
2188: argv_consume(&ac);
2189: break;
1.158 dtucker 2190:
1.176 djm 2191: case sChrootDirectory:
2192: charptr = &options->chroot_directory;
1.177 djm 2193:
1.380 djm 2194: arg = argv_next(&ac, &av);
1.177 djm 2195: if (!arg || *arg == '\0')
1.380 djm 2196: fatal("%s line %d: %s missing argument.",
2197: filename, linenum, keyword);
1.177 djm 2198: if (*activep && *charptr == NULL)
2199: *charptr = xstrdup(arg);
2200: break;
1.176 djm 2201:
1.204 djm 2202: case sTrustedUserCAKeys:
2203: charptr = &options->trusted_user_ca_keys;
2204: goto parse_filename;
2205:
2206: case sRevokedKeys:
2207: charptr = &options->revoked_keys_file;
2208: goto parse_filename;
2209:
1.355 djm 2210: case sSecurityKeyProvider:
2211: charptr = &options->sk_provider;
1.380 djm 2212: arg = argv_next(&ac, &av);
1.356 djm 2213: if (!arg || *arg == '\0')
1.380 djm 2214: fatal("%s line %d: %s missing argument.",
2215: filename, linenum, keyword);
1.356 djm 2216: if (*activep && *charptr == NULL) {
2217: *charptr = strcasecmp(arg, "internal") == 0 ?
2218: xstrdup(arg) : derelativise_path(arg);
2219: /* increase optional counter */
2220: if (intptr != NULL)
2221: *intptr = *intptr + 1;
2222: }
2223: break;
1.355 djm 2224:
1.213 djm 2225: case sIPQoS:
1.380 djm 2226: arg = argv_next(&ac, &av);
2227: if (!arg || *arg == '\0')
2228: fatal("%s line %d: %s missing argument.",
2229: filename, linenum, keyword);
1.213 djm 2230: if ((value = parse_ipqos(arg)) == -1)
1.380 djm 2231: fatal("%s line %d: Bad %s value: %s",
2232: filename, linenum, keyword, arg);
2233: arg = argv_next(&ac, &av);
1.213 djm 2234: if (arg == NULL)
2235: value2 = value;
2236: else if ((value2 = parse_ipqos(arg)) == -1)
1.380 djm 2237: fatal("%s line %d: Bad %s value: %s",
2238: filename, linenum, keyword, arg);
1.213 djm 2239: if (*activep) {
2240: options->ip_qos_interactive = value;
2241: options->ip_qos_bulk = value2;
2242: }
2243: break;
2244:
1.225 djm 2245: case sVersionAddendum:
1.380 djm 2246: if (str == NULL || *str == '\0')
2247: fatal("%s line %d: %s missing argument.",
2248: filename, linenum, keyword);
2249: len = strspn(str, WHITESPACE);
2250: if (strchr(str + len, '\r') != NULL) {
2251: fatal("%.200s line %d: Invalid %s argument",
2252: filename, linenum, keyword);
2253: }
2254: if ((arg = strchr(line, '#')) != NULL) {
2255: *arg = '\0';
2256: rtrim(line);
2257: }
1.225 djm 2258: if (*activep && options->version_addendum == NULL) {
1.380 djm 2259: if (strcasecmp(str + len, "none") == 0)
1.225 djm 2260: options->version_addendum = xstrdup("");
2261: else
1.380 djm 2262: options->version_addendum = xstrdup(str + len);
1.225 djm 2263: }
1.380 djm 2264: argv_consume(&ac);
2265: break;
1.225 djm 2266:
1.231 djm 2267: case sAuthorizedKeysCommand:
1.380 djm 2268: charptr = &options->authorized_keys_command;
2269: parse_command:
2270: len = strspn(str, WHITESPACE);
2271: if (str[len] != '/' && strcasecmp(str + len, "none") != 0) {
2272: fatal("%.200s line %d: %s must be an absolute path",
2273: filename, linenum, keyword);
2274: }
2275: if (*activep && options->authorized_keys_command == NULL)
2276: *charptr = xstrdup(str + len);
2277: argv_consume(&ac);
2278: break;
1.231 djm 2279:
2280: case sAuthorizedKeysCommandUser:
2281: charptr = &options->authorized_keys_command_user;
1.380 djm 2282: parse_localuser:
2283: arg = argv_next(&ac, &av);
2284: if (!arg || *arg == '\0') {
2285: fatal("%s line %d: missing %s argument.",
2286: filename, linenum, keyword);
2287: }
1.231 djm 2288: if (*activep && *charptr == NULL)
2289: *charptr = xstrdup(arg);
2290: break;
2291:
1.270 djm 2292: case sAuthorizedPrincipalsCommand:
1.380 djm 2293: charptr = &options->authorized_principals_command;
2294: goto parse_command;
1.270 djm 2295:
2296: case sAuthorizedPrincipalsCommandUser:
2297: charptr = &options->authorized_principals_command_user;
1.380 djm 2298: goto parse_localuser;
1.270 djm 2299:
1.232 djm 2300: case sAuthenticationMethods:
1.380 djm 2301: found = options->num_auth_methods == 0;
2302: value = 0; /* seen "any" pseudo-method */
2303: value2 = 0; /* successfully parsed any method */
2304: while ((arg = argv_next(&ac, &av)) != NULL) {
2305: if (strcmp(arg, "any") == 0) {
2306: if (options->num_auth_methods > 0) {
2307: fatal("%s line %d: \"any\" must "
2308: "appear alone in %s",
2309: filename, linenum, keyword);
1.291 djm 2310: }
1.380 djm 2311: value = 1;
2312: } else if (value) {
2313: fatal("%s line %d: \"any\" must appear "
2314: "alone in %s", filename, linenum, keyword);
2315: } else if (auth2_methods_valid(arg, 0) != 0) {
2316: fatal("%s line %d: invalid %s method list.",
2317: filename, linenum, keyword);
1.291 djm 2318: }
1.380 djm 2319: value2 = 1;
2320: if (!found || !*activep)
2321: continue;
2322: opt_array_append(filename, linenum, keyword,
2323: &options->auth_methods,
2324: &options->num_auth_methods, arg);
2325: }
2326: if (value2 == 0) {
2327: fatal("%s line %d: no %s specified",
2328: filename, linenum, keyword);
1.232 djm 2329: }
1.380 djm 2330: break;
1.232 djm 2331:
1.251 millert 2332: case sStreamLocalBindMask:
1.380 djm 2333: arg = argv_next(&ac, &av);
1.251 millert 2334: if (!arg || *arg == '\0')
1.380 djm 2335: fatal("%s line %d: %s missing argument.",
2336: filename, linenum, keyword);
1.251 millert 2337: /* Parse mode in octal format */
2338: value = strtol(arg, &p, 8);
2339: if (arg == p || value < 0 || value > 0777)
1.380 djm 2340: fatal("%s line %d: Invalid %s.",
2341: filename, linenum, keyword);
1.268 djm 2342: if (*activep)
2343: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 2344: break;
2345:
2346: case sStreamLocalBindUnlink:
2347: intptr = &options->fwd_opts.streamlocal_bind_unlink;
2348: goto parse_flag;
2349:
1.256 djm 2350: case sFingerprintHash:
1.380 djm 2351: arg = argv_next(&ac, &av);
1.256 djm 2352: if (!arg || *arg == '\0')
1.380 djm 2353: fatal("%s line %d: %s missing argument.",
2354: filename, linenum, keyword);
1.256 djm 2355: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1.380 djm 2356: fatal("%.200s line %d: Invalid %s algorithm \"%s\".",
2357: filename, linenum, keyword, arg);
1.256 djm 2358: if (*activep)
2359: options->fingerprint_hash = value;
2360: break;
2361:
1.309 djm 2362: case sExposeAuthInfo:
2363: intptr = &options->expose_userauth_info;
2364: goto parse_flag;
2365:
1.316 djm 2366: case sRDomain:
2367: charptr = &options->routing_domain;
1.380 djm 2368: arg = argv_next(&ac, &av);
1.316 djm 2369: if (!arg || *arg == '\0')
1.380 djm 2370: fatal("%s line %d: %s missing argument.",
2371: filename, linenum, keyword);
1.316 djm 2372: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2373: !valid_rdomain(arg))
1.380 djm 2374: fatal("%s line %d: invalid routing domain",
1.316 djm 2375: filename, linenum);
2376: if (*activep && *charptr == NULL)
2377: *charptr = xstrdup(arg);
1.321 dtucker 2378: break;
1.316 djm 2379:
1.94 markus 2380: case sDeprecated:
1.295 djm 2381: case sIgnore:
1.121 jakob 2382: case sUnsupported:
1.295 djm 2383: do_log2(opcode == sIgnore ?
2384: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2385: "%s line %d: %s option %s", filename, linenum,
1.380 djm 2386: opcode == sUnsupported ? "Unsupported" : "Deprecated",
2387: keyword);
2388: argv_consume(&ac);
1.94 markus 2389: break;
2390:
2391: default:
2392: fatal("%s line %d: Missing handler for opcode %s (%d)",
1.380 djm 2393: filename, linenum, keyword, opcode);
2394: }
2395: /* Check that there is no garbage at end of line. */
2396: if (ac > 0) {
2397: error("%.200s line %d: keyword %s extra arguments "
2398: "at end of line", filename, linenum, keyword);
2399: goto out;
1.94 markus 2400: }
1.380 djm 2401:
2402: /* success */
2403: ret = 0;
2404: out:
2405: argv_free(oav, oac);
2406: return ret;
1.94 markus 2407: }
2408:
1.360 djm 2409: int
2410: process_server_config_line(ServerOptions *options, char *line,
2411: const char *filename, int linenum, int *activep,
2412: struct connection_info *connectinfo, struct include_list *includes)
2413: {
1.365 djm 2414: int inc_flags = 0;
2415:
1.360 djm 2416: return process_server_config_line_depth(options, line, filename,
1.365 djm 2417: linenum, activep, connectinfo, &inc_flags, 0, includes);
1.360 djm 2418: }
2419:
2420:
1.94 markus 2421: /* Reads the server configuration file. */
1.25 markus 2422:
1.94 markus 2423: void
1.338 markus 2424: load_server_config(const char *filename, struct sshbuf *conf)
1.94 markus 2425: {
1.366 markus 2426: struct stat st;
1.331 markus 2427: char *line = NULL, *cp;
2428: size_t linesize = 0;
1.94 markus 2429: FILE *f;
1.338 markus 2430: int r, lineno = 0;
1.81 stevesk 2431:
1.371 djm 2432: debug2_f("filename %s", filename);
1.134 djm 2433: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2434: perror(filename);
2435: exit(1);
2436: }
1.338 markus 2437: sshbuf_reset(conf);
1.366 markus 2438: /* grow buffer, so realloc is avoided for large config files */
2439: if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
1.379 djm 2440: (r = sshbuf_allocate(conf, st.st_size)) != 0)
1.371 djm 2441: fatal_fr(r, "allocate");
1.331 markus 2442: while (getline(&line, &linesize, f) != -1) {
1.229 dtucker 2443: lineno++;
1.134 djm 2444: /*
1.380 djm 2445: * Strip whitespace
1.135 deraadt 2446: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2447: * line numbers later for error messages
2448: */
2449: cp = line + strspn(line, " \t\r");
1.338 markus 2450: if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
1.371 djm 2451: fatal_fr(r, "sshbuf_put");
1.134 djm 2452: }
1.331 markus 2453: free(line);
1.338 markus 2454: if ((r = sshbuf_put_u8(conf, 0)) != 0)
1.371 djm 2455: fatal_fr(r, "sshbuf_put_u8");
1.134 djm 2456: fclose(f);
1.371 djm 2457: debug2_f("done config len = %zu", sshbuf_len(conf));
1.134 djm 2458: }
2459:
2460: void
1.226 dtucker 2461: parse_server_match_config(ServerOptions *options,
1.360 djm 2462: struct include_list *includes, struct connection_info *connectinfo)
1.153 dtucker 2463: {
2464: ServerOptions mo;
2465:
2466: initialize_server_options(&mo);
1.360 djm 2467: parse_server_config(&mo, "reprocess config", cfg, includes,
1.384 djm 2468: connectinfo, 0);
1.168 dtucker 2469: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2470: }
2471:
1.226 dtucker 2472: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2473: {
2474: char *p;
2475:
2476: while ((p = strsep(&spec, ",")) && *p != '\0') {
2477: if (strncmp(p, "addr=", 5) == 0) {
2478: ci->address = xstrdup(p + 5);
2479: } else if (strncmp(p, "host=", 5) == 0) {
2480: ci->host = xstrdup(p + 5);
2481: } else if (strncmp(p, "user=", 5) == 0) {
2482: ci->user = xstrdup(p + 5);
2483: } else if (strncmp(p, "laddr=", 6) == 0) {
2484: ci->laddress = xstrdup(p + 6);
1.317 djm 2485: } else if (strncmp(p, "rdomain=", 8) == 0) {
2486: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2487: } else if (strncmp(p, "lport=", 6) == 0) {
2488: ci->lport = a2port(p + 6);
2489: if (ci->lport == -1) {
2490: fprintf(stderr, "Invalid port '%s' in test mode"
1.379 djm 2491: " specification %s\n", p+6, p);
1.226 dtucker 2492: return -1;
2493: }
2494: } else {
2495: fprintf(stderr, "Invalid test mode specification %s\n",
1.379 djm 2496: p);
1.226 dtucker 2497: return -1;
2498: }
2499: }
2500: return 0;
2501: }
2502:
1.168 dtucker 2503: /*
2504: * Copy any supported values that are set.
2505: *
1.195 jj 2506: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2507: * array values that are not used pre-authentication, because any that we
1.328 djm 2508: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2509: */
1.153 dtucker 2510: void
1.168 dtucker 2511: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2512: {
1.247 djm 2513: #define M_CP_INTOPT(n) do {\
2514: if (src->n != -1) \
2515: dst->n = src->n; \
2516: } while (0)
2517:
1.168 dtucker 2518: M_CP_INTOPT(password_authentication);
2519: M_CP_INTOPT(gss_authentication);
2520: M_CP_INTOPT(pubkey_authentication);
1.354 djm 2521: M_CP_INTOPT(pubkey_auth_options);
1.168 dtucker 2522: M_CP_INTOPT(kerberos_authentication);
2523: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2524: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2525: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2526: M_CP_INTOPT(permit_root_login);
1.188 djm 2527: M_CP_INTOPT(permit_empty_passwd);
1.362 djm 2528: M_CP_INTOPT(ignore_rhosts);
1.168 dtucker 2529:
2530: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2531: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2532: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2533: M_CP_INTOPT(disable_forwarding);
1.309 djm 2534: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2535: M_CP_INTOPT(permit_tun);
1.251 millert 2536: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2537: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2538: M_CP_INTOPT(x11_display_offset);
2539: M_CP_INTOPT(x11_forwarding);
2540: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2541: M_CP_INTOPT(permit_tty);
1.250 djm 2542: M_CP_INTOPT(permit_user_rc);
1.180 djm 2543: M_CP_INTOPT(max_sessions);
1.184 dtucker 2544: M_CP_INTOPT(max_authtries);
1.300 markus 2545: M_CP_INTOPT(client_alive_count_max);
2546: M_CP_INTOPT(client_alive_interval);
1.213 djm 2547: M_CP_INTOPT(ip_qos_interactive);
2548: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2549: M_CP_INTOPT(rekey_limit);
2550: M_CP_INTOPT(rekey_interval);
1.308 djm 2551: M_CP_INTOPT(log_level);
1.289 djm 2552:
2553: /*
2554: * The bind_mask is a mode_t that may be unsigned, so we can't use
2555: * M_CP_INTOPT - it does a signed comparison that causes compiler
2556: * warnings.
2557: */
1.290 dtucker 2558: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2559: dst->fwd_opts.streamlocal_bind_mask =
2560: src->fwd_opts.streamlocal_bind_mask;
2561: }
1.247 djm 2562:
2563: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2564: #define M_CP_STROPT(n) do {\
2565: if (src->n != NULL && dst->n != src->n) { \
2566: free(dst->n); \
2567: dst->n = src->n; \
2568: } \
2569: } while(0)
1.314 djm 2570: #define M_CP_STRARRAYOPT(s, num_s) do {\
2571: u_int i; \
2572: if (src->num_s != 0) { \
2573: for (i = 0; i < dst->num_s; i++) \
2574: free(dst->s[i]); \
2575: free(dst->s); \
2576: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2577: for (i = 0; i < src->num_s; i++) \
2578: dst->s[i] = xstrdup(src->s[i]); \
2579: dst->num_s = src->num_s; \
1.312 djm 2580: } \
2581: } while(0)
1.168 dtucker 2582:
1.218 djm 2583: /* See comment in servconf.h */
2584: COPY_MATCH_STRING_OPTS();
1.282 djm 2585:
2586: /* Arguments that accept '+...' need to be expanded */
2587: assemble_algorithms(dst);
1.216 djm 2588:
1.217 dtucker 2589: /*
2590: * The only things that should be below this point are string options
2591: * which are only used after authentication.
2592: */
1.168 dtucker 2593: if (preauth)
2594: return;
1.219 djm 2595:
1.283 djm 2596: /* These options may be "none" to clear a global setting */
1.168 dtucker 2597: M_CP_STROPT(adm_forced_command);
1.283 djm 2598: if (option_clear_or_none(dst->adm_forced_command)) {
2599: free(dst->adm_forced_command);
2600: dst->adm_forced_command = NULL;
2601: }
1.176 djm 2602: M_CP_STROPT(chroot_directory);
1.283 djm 2603: if (option_clear_or_none(dst->chroot_directory)) {
2604: free(dst->chroot_directory);
2605: dst->chroot_directory = NULL;
2606: }
1.153 dtucker 2607: }
1.168 dtucker 2608:
2609: #undef M_CP_INTOPT
2610: #undef M_CP_STROPT
1.219 djm 2611: #undef M_CP_STRARRAYOPT
1.153 dtucker 2612:
1.360 djm 2613: #define SERVCONF_MAX_DEPTH 16
1.364 djm 2614: static void
1.360 djm 2615: parse_server_config_depth(ServerOptions *options, const char *filename,
2616: struct sshbuf *conf, struct include_list *includes,
2617: struct connection_info *connectinfo, int flags, int *activep, int depth)
1.134 djm 2618: {
1.360 djm 2619: int linenum, bad_options = 0;
1.136 dtucker 2620: char *cp, *obuf, *cbuf;
1.134 djm 2621:
1.360 djm 2622: if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2623: fatal("Too many recursive configuration includes");
2624:
1.371 djm 2625: debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
1.365 djm 2626: (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
1.134 djm 2627:
1.287 djm 2628: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
1.371 djm 2629: fatal_f("sshbuf_dup_string failed");
1.137 dtucker 2630: linenum = 1;
1.140 deraadt 2631: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.360 djm 2632: if (process_server_config_line_depth(options, cp,
1.365 djm 2633: filename, linenum++, activep, connectinfo, &flags,
1.360 djm 2634: depth, includes) != 0)
1.94 markus 2635: bad_options++;
1.1 deraadt 2636: }
1.239 djm 2637: free(obuf);
1.78 stevesk 2638: if (bad_options > 0)
2639: fatal("%s: terminating, %d bad configuration options",
2640: filename, bad_options);
1.360 djm 2641: }
2642:
2643: void
2644: parse_server_config(ServerOptions *options, const char *filename,
2645: struct sshbuf *conf, struct include_list *includes,
1.384 djm 2646: struct connection_info *connectinfo, int reexec)
1.360 djm 2647: {
2648: int active = connectinfo ? 0 : 1;
2649: parse_server_config_depth(options, filename, conf, includes,
1.365 djm 2650: connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
1.384 djm 2651: if (!reexec)
2652: process_queued_listen_addrs(options);
1.182 dtucker 2653: }
2654:
2655: static const char *
1.221 djm 2656: fmt_multistate_int(int val, const struct multistate *m)
2657: {
2658: u_int i;
2659:
2660: for (i = 0; m[i].key != NULL; i++) {
2661: if (m[i].value == val)
2662: return m[i].key;
2663: }
2664: return "UNKNOWN";
2665: }
2666:
2667: static const char *
1.182 dtucker 2668: fmt_intarg(ServerOpCodes code, int val)
2669: {
1.221 djm 2670: if (val == -1)
2671: return "unset";
2672: switch (code) {
2673: case sAddressFamily:
2674: return fmt_multistate_int(val, multistate_addressfamily);
2675: case sPermitRootLogin:
2676: return fmt_multistate_int(val, multistate_permitrootlogin);
2677: case sGatewayPorts:
2678: return fmt_multistate_int(val, multistate_gatewayports);
2679: case sCompression:
2680: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2681: case sAllowTcpForwarding:
2682: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2683: case sAllowStreamLocalForwarding:
2684: return fmt_multistate_int(val, multistate_tcpfwd);
1.363 djm 2685: case sIgnoreRhosts:
2686: return fmt_multistate_int(val, multistate_ignore_rhosts);
1.256 djm 2687: case sFingerprintHash:
2688: return ssh_digest_alg_name(val);
1.221 djm 2689: default:
2690: switch (val) {
2691: case 0:
2692: return "no";
2693: case 1:
2694: return "yes";
2695: default:
2696: return "UNKNOWN";
2697: }
1.182 dtucker 2698: }
2699: }
2700:
2701: static void
2702: dump_cfg_int(ServerOpCodes code, int val)
2703: {
2704: printf("%s %d\n", lookup_opcode_name(code), val);
2705: }
2706:
2707: static void
1.263 dtucker 2708: dump_cfg_oct(ServerOpCodes code, int val)
2709: {
2710: printf("%s 0%o\n", lookup_opcode_name(code), val);
2711: }
2712:
2713: static void
1.182 dtucker 2714: dump_cfg_fmtint(ServerOpCodes code, int val)
2715: {
2716: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2717: }
2718:
2719: static void
2720: dump_cfg_string(ServerOpCodes code, const char *val)
2721: {
1.257 djm 2722: printf("%s %s\n", lookup_opcode_name(code),
2723: val == NULL ? "none" : val);
1.182 dtucker 2724: }
2725:
2726: static void
2727: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2728: {
2729: u_int i;
2730:
2731: for (i = 0; i < count; i++)
1.219 djm 2732: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2733: }
2734:
2735: static void
2736: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2737: {
2738: u_int i;
2739:
1.291 djm 2740: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2741: return;
1.219 djm 2742: printf("%s", lookup_opcode_name(code));
2743: for (i = 0; i < count; i++)
2744: printf(" %s", vals[i]);
1.291 djm 2745: if (code == sAuthenticationMethods && count == 0)
2746: printf(" any");
1.219 djm 2747: printf("\n");
1.182 dtucker 2748: }
2749:
1.315 djm 2750: static char *
2751: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2752: {
1.315 djm 2753: int r;
1.182 dtucker 2754: struct addrinfo *ai;
1.315 djm 2755: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2756: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2757:
1.263 dtucker 2758: /*
2759: * ListenAddress must be after Port. add_one_listen_addr pushes
2760: * addresses onto a stack, so to maintain ordering we need to
2761: * print these in reverse order.
2762: */
1.315 djm 2763: for (ai = la->addrs; ai; ai = ai->ai_next) {
2764: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2765: sizeof(addr), port, sizeof(port),
2766: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2767: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2768: continue;
2769: }
2770: laddr2 = laddr1;
2771: if (ai->ai_family == AF_INET6) {
2772: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2773: addr, port,
2774: la->rdomain == NULL ? "" : " rdomain ",
2775: la->rdomain == NULL ? "" : la->rdomain,
2776: laddr2);
1.182 dtucker 2777: } else {
1.315 djm 2778: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2779: addr, port,
2780: la->rdomain == NULL ? "" : " rdomain ",
2781: la->rdomain == NULL ? "" : la->rdomain,
2782: laddr2);
1.182 dtucker 2783: }
1.315 djm 2784: free(laddr2);
2785: }
2786: return laddr1;
2787: }
2788:
2789: void
2790: dump_config(ServerOptions *o)
2791: {
2792: char *s;
2793: u_int i;
2794:
2795: /* these are usually at the top of the config */
2796: for (i = 0; i < o->num_ports; i++)
2797: printf("port %d\n", o->ports[i]);
2798: dump_cfg_fmtint(sAddressFamily, o->address_family);
2799:
2800: for (i = 0; i < o->num_listen_addrs; i++) {
2801: s = format_listen_addrs(&o->listen_addrs[i]);
2802: printf("%s", s);
2803: free(s);
1.182 dtucker 2804: }
2805:
2806: /* integer arguments */
2807: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2808: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2809: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2810: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2811: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2812: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2813: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2814:
2815: /* formatted integer arguments */
2816: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2817: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2818: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2819: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2820: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2821: o->hostbased_uses_name_from_packet_only);
2822: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2823: #ifdef KRB5
1.182 dtucker 2824: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2825: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2826: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2827: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2828: #endif
2829: #ifdef GSSAPI
1.182 dtucker 2830: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2831: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2832: #endif
1.182 dtucker 2833: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2834: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2835: o->kbd_interactive_authentication);
2836: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2837: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2838: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2839: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2840: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2841: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2842: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2843: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2844: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2845: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2846: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2847: dump_cfg_fmtint(sUseDNS, o->use_dns);
2848: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2849: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2850: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2851: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2852: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2853: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2854: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2855:
2856: /* string arguments */
2857: dump_cfg_string(sPidFile, o->pid_file);
1.378 dtucker 2858: dump_cfg_string(sModuliFile, o->moduli_file);
1.182 dtucker 2859: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.358 dtucker 2860: dump_cfg_string(sCiphers, o->ciphers);
2861: dump_cfg_string(sMacs, o->macs);
1.182 dtucker 2862: dump_cfg_string(sBanner, o->banner);
2863: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2864: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2865: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2866: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.355 djm 2867: dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
1.208 djm 2868: dump_cfg_string(sAuthorizedPrincipalsFile,
2869: o->authorized_principals_file);
1.261 dtucker 2870: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2871: ? "none" : o->version_addendum);
1.231 djm 2872: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2873: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2874: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2875: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2876: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.358 dtucker 2877: dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
2878: dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
1.375 dtucker 2879: dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
1.358 dtucker 2880: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
1.374 dtucker 2881: dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
1.316 djm 2882: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2883:
2884: /* string arguments requiring a lookup */
2885: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2886: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2887:
2888: /* string array arguments */
1.219 djm 2889: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2890: o->authorized_keys_files);
1.182 dtucker 2891: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
1.379 djm 2892: o->host_key_files);
1.261 dtucker 2893: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.379 djm 2894: o->host_cert_files);
1.182 dtucker 2895: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2896: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2897: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2898: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2899: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.332 djm 2900: dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
1.232 djm 2901: dump_cfg_strarray_oneline(sAuthenticationMethods,
2902: o->num_auth_methods, o->auth_methods);
1.370 djm 2903: dump_cfg_strarray_oneline(sLogVerbose,
2904: o->num_log_verbose, o->log_verbose);
1.182 dtucker 2905:
2906: /* other arguments */
2907: for (i = 0; i < o->num_subsystems; i++)
2908: printf("subsystem %s %s\n", o->subsystem_name[i],
2909: o->subsystem_args[i]);
2910:
2911: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2912: o->max_startups_rate, o->max_startups);
1.372 dtucker 2913: printf("persourcemaxstartups ");
2914: if (o->per_source_max_startups == INT_MAX)
2915: printf("none\n");
2916: else
2917: printf("%d\n", o->per_source_max_startups);
1.373 dtucker 2918: printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
1.372 dtucker 2919: o->per_source_masklen_ipv6);
1.182 dtucker 2920:
1.318 djm 2921: s = NULL;
2922: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2923: if (tunmode_desc[i].val == o->permit_tun) {
2924: s = tunmode_desc[i].text;
2925: break;
2926: }
1.318 djm 2927: }
1.182 dtucker 2928: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2929:
1.214 stevesk 2930: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2931: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2932:
1.284 dtucker 2933: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2934: o->rekey_interval);
1.182 dtucker 2935:
1.310 djm 2936: printf("permitopen");
2937: if (o->num_permitted_opens == 0)
2938: printf(" any");
2939: else {
2940: for (i = 0; i < o->num_permitted_opens; i++)
2941: printf(" %s", o->permitted_opens[i]);
1.329 djm 2942: }
2943: printf("\n");
1.330 djm 2944: printf("permitlisten");
2945: if (o->num_permitted_listens == 0)
1.329 djm 2946: printf(" any");
2947: else {
1.330 djm 2948: for (i = 0; i < o->num_permitted_listens; i++)
2949: printf(" %s", o->permitted_listens[i]);
1.310 djm 2950: }
2951: printf("\n");
1.334 djm 2952:
1.367 djm 2953: if (o->permit_user_env_allowlist == NULL) {
1.334 djm 2954: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2955: } else {
2956: printf("permituserenvironment %s\n",
1.367 djm 2957: o->permit_user_env_allowlist);
1.334 djm 2958: }
2959:
1.354 djm 2960: printf("pubkeyauthoptions");
2961: if (o->pubkey_auth_options == 0)
2962: printf(" none");
2963: if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
2964: printf(" touch-required");
1.368 djm 2965: if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
2966: printf(" verify-required");
1.354 djm 2967: printf("\n");
1.1 deraadt 2968: }
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