Annotation of src/usr.bin/ssh/servconf.c, Revision 1.381
1.226 dtucker 1:
1.381 ! dtucker 2: /* $OpenBSD: servconf.c,v 1.380 2021/06/08 07:09:42 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,
1.323 dtucker 465: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 466: sPasswordAuthentication, sKbdInteractiveAuthentication,
467: sListenAddress, sAddressFamily,
1.72 stevesk 468: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 469: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 470: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 471: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 472: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.378 dtucker 473: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile, sModuliFile,
1.374 dtucker 474: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
1.258 djm 475: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 476: sBanner, sUseDNS, sHostbasedAuthentication,
1.375 dtucker 477: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
1.372 dtucker 478: sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
1.258 djm 479: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 480: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
1.332 djm 481: sAcceptEnv, sSetEnv, sPermitTunnel,
1.330 djm 482: sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
1.200 dtucker 483: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.360 djm 484: sHostCertificate, sInclude,
1.208 djm 485: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 486: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.341 djm 487: sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 488: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 489: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 490: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 491: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.355 djm 492: sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
1.295 djm 493: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 494: } ServerOpCodes;
495:
1.360 djm 496: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
497: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
498: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
499: #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
1.365 djm 500: #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
1.153 dtucker 501:
1.1 deraadt 502: /* Textual representation of the tokens. */
1.25 markus 503: static struct {
504: const char *name;
505: ServerOpCodes opcode;
1.153 dtucker 506: u_int flags;
1.25 markus 507: } keywords[] = {
1.153 dtucker 508: { "port", sPort, SSHCFG_GLOBAL },
509: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
510: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 511: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 512: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.378 dtucker 513: { "modulifile", sModuliFile, SSHCFG_GLOBAL },
1.293 naddy 514: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 515: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 516: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 517: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 518: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
1.308 djm 519: { "loglevel", sLogLevel, SSHCFG_ALL },
1.370 djm 520: { "logverbose", sLogVerbose, SSHCFG_ALL },
1.153 dtucker 521: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 522: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 523: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 524: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.377 dtucker 525: { "hostbasedacceptedalgorithms", sHostbasedAcceptedAlgorithms, SSHCFG_ALL },
1.375 dtucker 526: { "hostbasedacceptedkeytypes", sHostbasedAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
1.276 markus 527: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 528: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 529: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.377 dtucker 530: { "pubkeyacceptedalgorithms", sPubkeyAcceptedAlgorithms, SSHCFG_ALL },
1.374 dtucker 531: { "pubkeyacceptedkeytypes", sPubkeyAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
1.354 djm 532: { "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
1.153 dtucker 533: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 534: #ifdef KRB5
1.168 dtucker 535: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 536: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
537: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
538: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 539: #else
1.168 dtucker 540: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 541: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
542: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
543: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 544: #endif
1.153 dtucker 545: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
546: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 547: #ifdef GSSAPI
1.168 dtucker 548: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 549: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 550: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 551: #else
1.168 dtucker 552: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 553: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 554: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 555: #endif
1.168 dtucker 556: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
557: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.381 ! dtucker 558: { "challengeresponseauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
! 559: { "skeyauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
1.153 dtucker 560: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
561: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
562: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
563: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
564: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
1.362 djm 565: { "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
1.153 dtucker 566: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 567: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
568: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
569: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 570: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
571: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 572: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 573: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 574: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 575: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 576: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 577: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
578: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
579: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 580: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 581: { "allowusers", sAllowUsers, SSHCFG_ALL },
582: { "denyusers", sDenyUsers, SSHCFG_ALL },
583: { "allowgroups", sAllowGroups, SSHCFG_ALL },
584: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 585: { "ciphers", sCiphers, SSHCFG_GLOBAL },
586: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 587: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 588: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
589: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
590: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.372 dtucker 591: { "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
592: { "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
1.184 dtucker 593: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 594: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 595: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 596: { "usedns", sUseDNS, SSHCFG_GLOBAL },
597: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
598: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
1.300 markus 599: { "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
600: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
1.209 djm 601: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 602: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.306 djm 603: { "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
1.227 markus 604: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.332 djm 605: { "setenv", sSetEnv, SSHCFG_ALL },
1.209 djm 606: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 607: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 608: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 609: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 610: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.330 djm 611: { "permitlisten", sPermitListen, SSHCFG_ALL },
1.158 dtucker 612: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 613: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 614: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 615: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
616: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 617: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 618: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.360 djm 619: { "include", sInclude, SSHCFG_ALL },
1.213 djm 620: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 621: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
622: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 623: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
624: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 625: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 626: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 627: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
628: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
629: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 630: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.301 djm 631: { "disableforwarding", sDisableForwarding, SSHCFG_ALL },
1.309 djm 632: { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
1.316 djm 633: { "rdomain", sRDomain, SSHCFG_ALL },
1.342 djm 634: { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
1.355 djm 635: { "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
1.153 dtucker 636: { NULL, sBadOption, 0 }
1.1 deraadt 637: };
638:
1.182 dtucker 639: static struct {
640: int val;
641: char *text;
642: } tunmode_desc[] = {
643: { SSH_TUNMODE_NO, "no" },
644: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
645: { SSH_TUNMODE_ETHERNET, "ethernet" },
646: { SSH_TUNMODE_YES, "yes" },
647: { -1, NULL }
648: };
649:
1.329 djm 650: /* Returns an opcode name from its number */
651:
652: static const char *
653: lookup_opcode_name(ServerOpCodes code)
654: {
655: u_int i;
656:
657: for (i = 0; keywords[i].name != NULL; i++)
658: if (keywords[i].opcode == code)
659: return(keywords[i].name);
660: return "UNKNOWN";
661: }
662:
663:
1.27 markus 664: /*
1.73 stevesk 665: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 666: */
1.1 deraadt 667:
1.34 markus 668: static ServerOpCodes
1.25 markus 669: parse_token(const char *cp, const char *filename,
1.153 dtucker 670: int linenum, u_int *flags)
1.1 deraadt 671: {
1.55 markus 672: u_int i;
1.1 deraadt 673:
1.25 markus 674: for (i = 0; keywords[i].name; i++)
1.153 dtucker 675: if (strcasecmp(cp, keywords[i].name) == 0) {
676: *flags = keywords[i].flags;
1.25 markus 677: return keywords[i].opcode;
1.153 dtucker 678: }
1.25 markus 679:
1.78 stevesk 680: error("%s: line %d: Bad configuration option: %s",
681: filename, linenum, cp);
1.25 markus 682: return sBadOption;
1.1 deraadt 683: }
684:
1.202 djm 685: char *
686: derelativise_path(const char *path)
687: {
1.259 deraadt 688: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 689:
1.257 djm 690: if (strcasecmp(path, "none") == 0)
691: return xstrdup("none");
1.202 djm 692: expanded = tilde_expand_filename(path, getuid());
1.343 djm 693: if (path_absolute(expanded))
1.202 djm 694: return expanded;
1.207 djm 695: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.371 djm 696: fatal_f("getcwd: %s", strerror(errno));
1.202 djm 697: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 698: free(expanded);
1.202 djm 699: return ret;
700: }
701:
1.84 itojun 702: static void
1.315 djm 703: add_listen_addr(ServerOptions *options, const char *addr,
704: const char *rdomain, int port)
1.74 stevesk 705: {
1.142 djm 706: u_int i;
1.74 stevesk 707:
1.315 djm 708: if (port > 0)
709: add_one_listen_addr(options, addr, rdomain, port);
710: else {
711: for (i = 0; i < options->num_ports; i++) {
712: add_one_listen_addr(options, addr, rdomain,
713: options->ports[i]);
714: }
715: }
1.74 stevesk 716: }
717:
1.84 itojun 718: static void
1.315 djm 719: add_one_listen_addr(ServerOptions *options, const char *addr,
720: const char *rdomain, int port)
1.29 markus 721: {
722: struct addrinfo hints, *ai, *aitop;
723: char strport[NI_MAXSERV];
724: int gaierr;
1.315 djm 725: u_int i;
726:
727: /* Find listen_addrs entry for this rdomain */
728: for (i = 0; i < options->num_listen_addrs; i++) {
729: if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
730: break;
731: if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
732: continue;
733: if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
734: break;
735: }
736: if (i >= options->num_listen_addrs) {
737: /* No entry for this rdomain; allocate one */
738: if (i >= INT_MAX)
1.371 djm 739: fatal_f("too many listen addresses");
1.315 djm 740: options->listen_addrs = xrecallocarray(options->listen_addrs,
741: options->num_listen_addrs, options->num_listen_addrs + 1,
742: sizeof(*options->listen_addrs));
743: i = options->num_listen_addrs++;
744: if (rdomain != NULL)
745: options->listen_addrs[i].rdomain = xstrdup(rdomain);
746: }
747: /* options->listen_addrs[i] points to the addresses for this rdomain */
1.29 markus 748:
1.74 stevesk 749: memset(&hints, 0, sizeof(hints));
1.138 djm 750: hints.ai_family = options->address_family;
1.74 stevesk 751: hints.ai_socktype = SOCK_STREAM;
752: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 753: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 754: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
755: fatal("bad addr or host: %s (%s)",
756: addr ? addr : "<NULL>",
1.173 dtucker 757: ssh_gai_strerror(gaierr));
1.74 stevesk 758: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
759: ;
1.315 djm 760: ai->ai_next = options->listen_addrs[i].addrs;
761: options->listen_addrs[i].addrs = aitop;
762: }
763:
764: /* Returns nonzero if the routing domain name is valid */
765: static int
766: valid_rdomain(const char *name)
767: {
768: const char *errstr;
769: long long num;
770: struct rt_tableinfo info;
771: int mib[6];
772: size_t miblen = sizeof(mib);
773:
774: if (name == NULL)
775: return 1;
776:
777: num = strtonum(name, 0, 255, &errstr);
778: if (errstr != NULL)
779: return 0;
780:
781: /* Check whether the table actually exists */
782: memset(mib, 0, sizeof(mib));
783: mib[0] = CTL_NET;
784: mib[1] = PF_ROUTE;
785: mib[4] = NET_RT_TABLE;
786: mib[5] = (int)num;
787: if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
788: return 0;
789:
790: return 1;
1.29 markus 791: }
792:
1.266 dtucker 793: /*
794: * Queue a ListenAddress to be processed once we have all of the Ports
795: * and AddressFamily options.
796: */
797: static void
1.315 djm 798: queue_listen_addr(ServerOptions *options, const char *addr,
799: const char *rdomain, int port)
1.266 dtucker 800: {
1.315 djm 801: struct queued_listenaddr *qla;
802:
803: options->queued_listen_addrs = xrecallocarray(
804: options->queued_listen_addrs,
805: options->num_queued_listens, options->num_queued_listens + 1,
806: sizeof(*options->queued_listen_addrs));
807: qla = &options->queued_listen_addrs[options->num_queued_listens++];
808: qla->addr = xstrdup(addr);
809: qla->port = port;
810: qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
1.266 dtucker 811: }
812:
813: /*
814: * Process queued (text) ListenAddress entries.
815: */
816: static void
817: process_queued_listen_addrs(ServerOptions *options)
818: {
819: u_int i;
1.315 djm 820: struct queued_listenaddr *qla;
1.266 dtucker 821:
822: if (options->num_ports == 0)
823: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
824: if (options->address_family == -1)
825: options->address_family = AF_UNSPEC;
826:
827: for (i = 0; i < options->num_queued_listens; i++) {
1.315 djm 828: qla = &options->queued_listen_addrs[i];
829: add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
830: free(qla->addr);
831: free(qla->rdomain);
1.266 dtucker 832: }
833: free(options->queued_listen_addrs);
834: options->queued_listen_addrs = NULL;
835: options->num_queued_listens = 0;
836: }
837:
1.310 djm 838: /*
1.329 djm 839: * Inform channels layer of permitopen options for a single forwarding
840: * direction (local/remote).
1.310 djm 841: */
1.329 djm 842: static void
843: process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
844: char **opens, u_int num_opens)
1.310 djm 845: {
846: u_int i;
847: int port;
1.347 dtucker 848: char *host, *arg, *oarg, ch;
1.329 djm 849: int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
850: const char *what = lookup_opcode_name(opcode);
1.310 djm 851:
1.329 djm 852: channel_clear_permission(ssh, FORWARD_ADM, where);
853: if (num_opens == 0)
1.310 djm 854: return; /* permit any */
855:
856: /* handle keywords: "any" / "none" */
1.329 djm 857: if (num_opens == 1 && strcmp(opens[0], "any") == 0)
1.310 djm 858: return;
1.329 djm 859: if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
860: channel_disable_admin(ssh, where);
1.310 djm 861: return;
862: }
863: /* Otherwise treat it as a list of permitted host:port */
1.329 djm 864: for (i = 0; i < num_opens; i++) {
865: oarg = arg = xstrdup(opens[i]);
1.348 dtucker 866: ch = '\0';
1.347 dtucker 867: host = hpdelim2(&arg, &ch);
868: if (host == NULL || ch == '/')
1.371 djm 869: fatal_f("missing host in %s", what);
1.310 djm 870: host = cleanhostname(host);
871: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.371 djm 872: fatal_f("bad port number in %s", what);
1.310 djm 873: /* Send it to channels layer */
1.329 djm 874: channel_add_permission(ssh, FORWARD_ADM,
875: where, host, port);
1.310 djm 876: free(oarg);
877: }
878: }
879:
1.329 djm 880: /*
881: * Inform channels layer of permitopen options from configuration.
882: */
883: void
884: process_permitopen(struct ssh *ssh, ServerOptions *options)
885: {
886: process_permitopen_list(ssh, sPermitOpen,
887: options->permitted_opens, options->num_permitted_opens);
1.330 djm 888: process_permitopen_list(ssh, sPermitListen,
889: options->permitted_listens,
890: options->num_permitted_listens);
1.329 djm 891: }
892:
1.226 dtucker 893: struct connection_info *
1.346 djm 894: get_connection_info(struct ssh *ssh, int populate, int use_dns)
1.226 dtucker 895: {
896: static struct connection_info ci;
897:
1.346 djm 898: if (ssh == NULL || !populate)
1.226 dtucker 899: return &ci;
1.286 djm 900: ci.host = auth_get_canonical_hostname(ssh, use_dns);
901: ci.address = ssh_remote_ipaddr(ssh);
902: ci.laddress = ssh_local_ipaddr(ssh);
903: ci.lport = ssh_local_port(ssh);
1.317 djm 904: ci.rdomain = ssh_packet_rdomain_in(ssh);
1.226 dtucker 905: return &ci;
906: }
907:
1.153 dtucker 908: /*
909: * The strategy for the Match blocks is that the config file is parsed twice.
910: *
911: * The first time is at startup. activep is initialized to 1 and the
912: * directives in the global context are processed and acted on. Hitting a
913: * Match directive unsets activep and the directives inside the block are
914: * checked for syntax only.
915: *
916: * The second time is after a connection has been established but before
917: * authentication. activep is initialized to 2 and global config directives
918: * are ignored since they have already been processed. If the criteria in a
919: * Match block is met, activep is set and the subsequent directives
920: * processed and actioned until EOF or another Match block unsets it. Any
921: * options set are copied into the main server config.
922: *
923: * Potential additions/improvements:
1.295 djm 924: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 925: *
926: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
927: * Match Address 192.168.0.*
928: * Tag trusted
929: * Match Group wheel
930: * Tag trusted
931: * Match Tag trusted
932: * AllowTcpForwarding yes
933: * GatewayPorts clientspecified
934: * [...]
935: *
936: * - Add a PermittedChannelRequests directive
937: * Match Group shell
938: * PermittedChannelRequests session,forwarded-tcpip
939: */
940:
941: static int
1.165 dtucker 942: match_cfg_line_group(const char *grps, int line, const char *user)
943: {
944: int result = 0;
945: struct passwd *pw;
946:
947: if (user == NULL)
948: goto out;
949:
950: if ((pw = getpwnam(user)) == NULL) {
951: debug("Can't match group at line %d because user %.100s does "
952: "not exist", line, user);
953: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
954: debug("Can't Match group because user %.100s not in any group "
955: "at line %d", user, line);
1.186 djm 956: } else if (ga_match_pattern_list(grps) != 1) {
957: debug("user %.100s does not match group list %.100s at line %d",
958: user, grps, line);
1.165 dtucker 959: } else {
1.186 djm 960: debug("user %.100s matched group list %.100s at line %d", user,
961: grps, line);
1.165 dtucker 962: result = 1;
963: }
964: out:
965: ga_free();
966: return result;
967: }
968:
1.319 dtucker 969: static void
970: match_test_missing_fatal(const char *criteria, const char *attrib)
971: {
972: fatal("'Match %s' in configuration but '%s' not in connection "
973: "test specification.", criteria, attrib);
974: }
975:
1.226 dtucker 976: /*
1.230 dtucker 977: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 978: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 979: * not match.
1.226 dtucker 980: */
1.165 dtucker 981: static int
1.226 dtucker 982: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 983: {
1.243 dtucker 984: int result = 1, attributes = 0, port;
1.153 dtucker 985: char *arg, *attrib, *cp = *condition;
986:
1.226 dtucker 987: if (ci == NULL)
1.153 dtucker 988: debug3("checking syntax for 'Match %s'", cp);
989: else
1.226 dtucker 990: debug3("checking match for '%s' user %s host %s addr %s "
991: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
992: ci->host ? ci->host : "(null)",
993: ci->address ? ci->address : "(null)",
994: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 995:
996: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.380 djm 997: /* Terminate on comment */
998: if (*attrib == '#') {
999: cp = NULL; /* mark all arguments consumed */
1000: break;
1001: }
1002: arg = NULL;
1.243 dtucker 1003: attributes++;
1.380 djm 1004: /* Criterion "all" has no argument and must appear alone */
1.243 dtucker 1005: if (strcasecmp(attrib, "all") == 0) {
1.380 djm 1006: if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
1007: *arg != '\0' && *arg != '#')) {
1.243 dtucker 1008: error("'all' cannot be combined with other "
1009: "Match attributes");
1010: return -1;
1011: }
1.380 djm 1012: if (arg != NULL && *arg == '#')
1013: cp = NULL; /* mark all arguments consumed */
1.243 dtucker 1014: *condition = cp;
1015: return 1;
1016: }
1.380 djm 1017: /* All other criteria require an argument */
1018: if ((arg = strdelim(&cp)) == NULL ||
1019: *arg == '\0' || *arg == '#') {
1.153 dtucker 1020: error("Missing Match criteria for %s", attrib);
1021: return -1;
1022: }
1023: if (strcasecmp(attrib, "user") == 0) {
1.351 dtucker 1024: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.153 dtucker 1025: result = 0;
1026: continue;
1027: }
1.319 dtucker 1028: if (ci->user == NULL)
1029: match_test_missing_fatal("User", "user");
1.349 dtucker 1030: if (match_usergroup_pattern_list(ci->user, arg) != 1)
1.153 dtucker 1031: result = 0;
1032: else
1033: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 1034: "line %d", ci->user, arg, line);
1.165 dtucker 1035: } else if (strcasecmp(attrib, "group") == 0) {
1.351 dtucker 1036: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.226 dtucker 1037: result = 0;
1038: continue;
1039: }
1.319 dtucker 1040: if (ci->user == NULL)
1041: match_test_missing_fatal("Group", "user");
1.226 dtucker 1042: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 1043: case -1:
1044: return -1;
1045: case 0:
1046: result = 0;
1047: }
1.153 dtucker 1048: } else if (strcasecmp(attrib, "host") == 0) {
1.351 dtucker 1049: if (ci == NULL || (ci->test && ci->host == NULL)) {
1.153 dtucker 1050: result = 0;
1051: continue;
1052: }
1.319 dtucker 1053: if (ci->host == NULL)
1054: match_test_missing_fatal("Host", "host");
1.269 djm 1055: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 1056: result = 0;
1057: else
1058: debug("connection from %.100s matched 'Host "
1.226 dtucker 1059: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 1060: } else if (strcasecmp(attrib, "address") == 0) {
1.351 dtucker 1061: if (ci == NULL || (ci->test && ci->address == NULL)) {
1.369 dtucker 1062: if (addr_match_list(NULL, arg) != 0)
1063: fatal("Invalid Match address argument "
1064: "'%s' at line %d", arg, line);
1.226 dtucker 1065: result = 0;
1066: continue;
1067: }
1.319 dtucker 1068: if (ci->address == NULL)
1069: match_test_missing_fatal("Address", "addr");
1.226 dtucker 1070: switch (addr_match_list(ci->address, arg)) {
1.181 djm 1071: case 1:
1072: debug("connection from %.100s matched 'Address "
1.226 dtucker 1073: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 1074: break;
1075: case 0:
1.183 djm 1076: case -1:
1.153 dtucker 1077: result = 0;
1.181 djm 1078: break;
1.183 djm 1079: case -2:
1.181 djm 1080: return -1;
1.153 dtucker 1081: }
1.226 dtucker 1082: } else if (strcasecmp(attrib, "localaddress") == 0){
1.351 dtucker 1083: if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1.369 dtucker 1084: if (addr_match_list(NULL, arg) != 0)
1085: fatal("Invalid Match localaddress "
1086: "argument '%s' at line %d", arg,
1087: line);
1.226 dtucker 1088: result = 0;
1089: continue;
1090: }
1.319 dtucker 1091: if (ci->laddress == NULL)
1092: match_test_missing_fatal("LocalAddress",
1093: "laddr");
1.226 dtucker 1094: switch (addr_match_list(ci->laddress, arg)) {
1095: case 1:
1096: debug("connection from %.100s matched "
1097: "'LocalAddress %.100s' at line %d",
1098: ci->laddress, arg, line);
1099: break;
1100: case 0:
1101: case -1:
1102: result = 0;
1103: break;
1104: case -2:
1105: return -1;
1106: }
1107: } else if (strcasecmp(attrib, "localport") == 0) {
1108: if ((port = a2port(arg)) == -1) {
1109: error("Invalid LocalPort '%s' on Match line",
1110: arg);
1111: return -1;
1112: }
1.351 dtucker 1113: if (ci == NULL || (ci->test && ci->lport == -1)) {
1.226 dtucker 1114: result = 0;
1115: continue;
1116: }
1.319 dtucker 1117: if (ci->lport == 0)
1118: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1119: /* TODO support port lists */
1120: if (port == ci->lport)
1121: debug("connection from %.100s matched "
1122: "'LocalPort %d' at line %d",
1123: ci->laddress, port, line);
1124: else
1125: result = 0;
1.317 djm 1126: } else if (strcasecmp(attrib, "rdomain") == 0) {
1.351 dtucker 1127: if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1.317 djm 1128: result = 0;
1129: continue;
1130: }
1.351 dtucker 1131: if (ci->rdomain == NULL)
1132: match_test_missing_fatal("RDomain", "rdomain");
1.317 djm 1133: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1134: result = 0;
1135: else
1136: debug("user %.100s matched 'RDomain %.100s' at "
1137: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1138: } else {
1139: error("Unsupported Match attribute %s", attrib);
1140: return -1;
1141: }
1.243 dtucker 1142: }
1143: if (attributes == 0) {
1144: error("One or more attributes required for Match");
1145: return -1;
1.153 dtucker 1146: }
1.226 dtucker 1147: if (ci != NULL)
1.153 dtucker 1148: debug3("match %sfound", result ? "" : "not ");
1149: *condition = cp;
1150: return result;
1151: }
1152:
1.158 dtucker 1153: #define WHITESPACE " \t\r\n"
1154:
1.220 djm 1155: /* Multistate option parsing */
1156: struct multistate {
1157: char *key;
1158: int value;
1159: };
1.320 djm 1160: static const struct multistate multistate_flag[] = {
1161: { "yes", 1 },
1162: { "no", 0 },
1163: { NULL, -1 }
1164: };
1.363 djm 1165: static const struct multistate multistate_ignore_rhosts[] = {
1166: { "yes", IGNORE_RHOSTS_YES },
1167: { "no", IGNORE_RHOSTS_NO },
1168: { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1169: { NULL, -1 }
1170: };
1.220 djm 1171: static const struct multistate multistate_addressfamily[] = {
1172: { "inet", AF_INET },
1173: { "inet6", AF_INET6 },
1174: { "any", AF_UNSPEC },
1175: { NULL, -1 }
1176: };
1177: static const struct multistate multistate_permitrootlogin[] = {
1178: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1179: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1180: { "forced-commands-only", PERMIT_FORCED_ONLY },
1181: { "yes", PERMIT_YES },
1182: { "no", PERMIT_NO },
1183: { NULL, -1 }
1184: };
1185: static const struct multistate multistate_compression[] = {
1.359 dtucker 1186: #ifdef WITH_ZLIB
1.337 sf 1187: { "yes", COMP_DELAYED },
1188: { "delayed", COMP_DELAYED },
1.359 dtucker 1189: #endif
1.220 djm 1190: { "no", COMP_NONE },
1191: { NULL, -1 }
1192: };
1193: static const struct multistate multistate_gatewayports[] = {
1194: { "clientspecified", 2 },
1195: { "yes", 1 },
1196: { "no", 0 },
1.222 djm 1197: { NULL, -1 }
1198: };
1.233 djm 1199: static const struct multistate multistate_tcpfwd[] = {
1200: { "yes", FORWARD_ALLOW },
1201: { "all", FORWARD_ALLOW },
1202: { "no", FORWARD_DENY },
1203: { "remote", FORWARD_REMOTE },
1204: { "local", FORWARD_LOCAL },
1205: { NULL, -1 }
1206: };
1.220 djm 1207:
1.360 djm 1208: static int
1209: process_server_config_line_depth(ServerOptions *options, char *line,
1.226 dtucker 1210: const char *filename, int linenum, int *activep,
1.365 djm 1211: struct connection_info *connectinfo, int *inc_flags, int depth,
1.360 djm 1212: struct include_list *includes)
1.1 deraadt 1213: {
1.380 djm 1214: char ch, *str, ***chararrayptr, **charptr, *arg, *arg2, *p, *keyword;
1.360 djm 1215: int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1.174 dtucker 1216: SyslogFacility *log_facility_ptr;
1217: LogLevel *log_level_ptr;
1.25 markus 1218: ServerOpCodes opcode;
1.329 djm 1219: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1220: size_t len;
1.237 dtucker 1221: long long val64;
1.220 djm 1222: const struct multistate *multistate_ptr;
1.322 dtucker 1223: const char *errstr;
1.360 djm 1224: struct include_item *item;
1225: glob_t gbuf;
1.380 djm 1226: char **oav = NULL, **av;
1227: int oac = 0, ac;
1228: int ret = -1;
1.303 djm 1229:
1230: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1231: if ((len = strlen(line)) == 0)
1232: return 0;
1233: for (len--; len > 0; len--) {
1234: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1235: break;
1236: line[len] = '\0';
1237: }
1.25 markus 1238:
1.380 djm 1239: str = line;
1240: if ((keyword = strdelim(&str)) == NULL)
1.147 djm 1241: return 0;
1.94 markus 1242: /* Ignore leading whitespace */
1.380 djm 1243: if (*keyword == '\0')
1244: keyword = strdelim(&str);
1245: if (!keyword || !*keyword || *keyword == '#')
1.94 markus 1246: return 0;
1.380 djm 1247: if (str == NULL || *str == '\0') {
1248: error("%s line %d: no argument after keyword \"%s\"",
1249: filename, linenum, keyword);
1250: return -1;
1251: }
1.94 markus 1252: intptr = NULL;
1253: charptr = NULL;
1.380 djm 1254: opcode = parse_token(keyword, filename, linenum, &flags);
1255:
1256: if (argv_split(str, &oac, &oav, 1) != 0) {
1257: error("%s line %d: invalid quotes", filename, linenum);
1258: return -1;
1259: }
1260: ac = oac;
1261: av = oav;
1.153 dtucker 1262:
1263: if (activep == NULL) { /* We are processing a command line directive */
1264: cmdline = 1;
1265: activep = &cmdline;
1266: }
1.360 djm 1267: if (*activep && opcode != sMatch && opcode != sInclude)
1.380 djm 1268: debug3("%s:%d setting %s %s", filename, linenum, keyword, str);
1.153 dtucker 1269: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1270: if (connectinfo == NULL) {
1.153 dtucker 1271: fatal("%s line %d: Directive '%s' is not allowed "
1.380 djm 1272: "within a Match block", filename, linenum, keyword);
1.153 dtucker 1273: } else { /* this is a directive we have already processed */
1.380 djm 1274: ret = 0;
1275: goto out;
1.153 dtucker 1276: }
1277: }
1278:
1.94 markus 1279: switch (opcode) {
1280: case sBadOption:
1.380 djm 1281: goto out;
1.94 markus 1282: case sPort:
1283: /* ignore ports from configfile if cmdline specifies ports */
1.380 djm 1284: if (options->ports_from_cmdline) {
1285: argv_consume(&ac);
1286: break;
1287: }
1.94 markus 1288: if (options->num_ports >= MAX_PORTS)
1289: fatal("%s line %d: too many ports.",
1290: filename, linenum);
1.380 djm 1291: arg = argv_next(&ac, &av);
1.94 markus 1292: if (!arg || *arg == '\0')
1293: fatal("%s line %d: missing port number.",
1294: filename, linenum);
1295: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1296: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1297: fatal("%s line %d: Badly formatted port number.",
1298: filename, linenum);
1299: break;
1.29 markus 1300:
1.94 markus 1301: case sLoginGraceTime:
1302: intptr = &options->login_grace_time;
1.180 djm 1303: parse_time:
1.380 djm 1304: arg = argv_next(&ac, &av);
1.94 markus 1305: if (!arg || *arg == '\0')
1306: fatal("%s line %d: missing time value.",
1307: filename, linenum);
1308: if ((value = convtime(arg)) == -1)
1309: fatal("%s line %d: invalid time value.",
1310: filename, linenum);
1.268 djm 1311: if (*activep && *intptr == -1)
1.94 markus 1312: *intptr = value;
1313: break;
1314:
1315: case sListenAddress:
1.380 djm 1316: arg = argv_next(&ac, &av);
1.139 djm 1317: if (arg == NULL || *arg == '\0')
1318: fatal("%s line %d: missing address",
1.94 markus 1319: filename, linenum);
1.144 dtucker 1320: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1321: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1322: && strchr(p+1, ':') != NULL) {
1.315 djm 1323: port = 0;
1324: p = arg;
1325: } else {
1.347 dtucker 1326: arg2 = NULL;
1.348 dtucker 1327: ch = '\0';
1.347 dtucker 1328: p = hpdelim2(&arg, &ch);
1329: if (p == NULL || ch == '/')
1.315 djm 1330: fatal("%s line %d: bad address:port usage",
1331: filename, linenum);
1332: p = cleanhostname(p);
1333: if (arg == NULL)
1334: port = 0;
1335: else if ((port = a2port(arg)) <= 0)
1336: fatal("%s line %d: bad port number",
1337: filename, linenum);
1338: }
1339: /* Optional routing table */
1340: arg2 = NULL;
1.380 djm 1341: if ((arg = argv_next(&ac, &av)) != NULL) {
1.315 djm 1342: if (strcmp(arg, "rdomain") != 0 ||
1.380 djm 1343: (arg2 = argv_next(&ac, &av)) == NULL)
1.315 djm 1344: fatal("%s line %d: bad ListenAddress syntax",
1345: filename, linenum);
1346: if (!valid_rdomain(arg2))
1347: fatal("%s line %d: bad routing domain",
1348: filename, linenum);
1.144 dtucker 1349: }
1.315 djm 1350: queue_listen_addr(options, p, arg2, port);
1.25 markus 1351:
1.138 djm 1352: break;
1353:
1354: case sAddressFamily:
1.220 djm 1355: intptr = &options->address_family;
1356: multistate_ptr = multistate_addressfamily;
1357: parse_multistate:
1.380 djm 1358: arg = argv_next(&ac, &av);
1.141 markus 1359: if (!arg || *arg == '\0')
1.220 djm 1360: fatal("%s line %d: missing argument.",
1.141 markus 1361: filename, linenum);
1.220 djm 1362: value = -1;
1363: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1364: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1365: value = multistate_ptr[i].value;
1366: break;
1367: }
1368: }
1369: if (value == -1)
1370: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1371: filename, linenum, arg);
1.220 djm 1372: if (*activep && *intptr == -1)
1.138 djm 1373: *intptr = value;
1.94 markus 1374: break;
1375:
1376: case sHostKeyFile:
1.380 djm 1377: arg = argv_next(&ac, &av);
1.94 markus 1378: if (!arg || *arg == '\0')
1379: fatal("%s line %d: missing file name.",
1380: filename, linenum);
1.344 djm 1381: if (*activep) {
1382: servconf_add_hostkey(filename, linenum,
1383: options, arg, 1);
1384: }
1.94 markus 1385: break;
1.76 stevesk 1386:
1.240 markus 1387: case sHostKeyAgent:
1388: charptr = &options->host_key_agent;
1.380 djm 1389: arg = argv_next(&ac, &av);
1.240 markus 1390: if (!arg || *arg == '\0')
1391: fatal("%s line %d: missing socket name.",
1392: filename, linenum);
1393: if (*activep && *charptr == NULL)
1394: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1395: xstrdup(arg) : derelativise_path(arg);
1396: break;
1397:
1.203 djm 1398: case sHostCertificate:
1.380 djm 1399: arg = argv_next(&ac, &av);
1.314 djm 1400: if (!arg || *arg == '\0')
1401: fatal("%s line %d: missing file name.",
1402: filename, linenum);
1403: if (*activep)
1404: servconf_add_hostcert(filename, linenum, options, arg);
1405: break;
1.203 djm 1406:
1.94 markus 1407: case sPidFile:
1408: charptr = &options->pid_file;
1.314 djm 1409: parse_filename:
1.380 djm 1410: arg = argv_next(&ac, &av);
1.314 djm 1411: if (!arg || *arg == '\0')
1412: fatal("%s line %d: missing file name.",
1413: filename, linenum);
1414: if (*activep && *charptr == NULL) {
1415: *charptr = derelativise_path(arg);
1416: /* increase optional counter */
1417: if (intptr != NULL)
1418: *intptr = *intptr + 1;
1419: }
1420: break;
1.25 markus 1421:
1.378 dtucker 1422: case sModuliFile:
1423: charptr = &options->moduli_file;
1424: goto parse_filename;
1425:
1.94 markus 1426: case sPermitRootLogin:
1427: intptr = &options->permit_root_login;
1.220 djm 1428: multistate_ptr = multistate_permitrootlogin;
1429: goto parse_multistate;
1.36 markus 1430:
1.94 markus 1431: case sIgnoreRhosts:
1432: intptr = &options->ignore_rhosts;
1.363 djm 1433: multistate_ptr = multistate_ignore_rhosts;
1.320 djm 1434: goto parse_multistate;
1.94 markus 1435:
1436: case sIgnoreUserKnownHosts:
1437: intptr = &options->ignore_user_known_hosts;
1.363 djm 1438: parse_flag:
1439: multistate_ptr = multistate_flag;
1440: goto parse_multistate;
1.94 markus 1441:
1442: case sHostbasedAuthentication:
1443: intptr = &options->hostbased_authentication;
1444: goto parse_flag;
1445:
1446: case sHostbasedUsesNameFromPacketOnly:
1447: intptr = &options->hostbased_uses_name_from_packet_only;
1448: goto parse_flag;
1449:
1.375 dtucker 1450: case sHostbasedAcceptedAlgorithms:
1451: charptr = &options->hostbased_accepted_algos;
1.374 dtucker 1452: parse_pubkey_algos:
1.380 djm 1453: arg = argv_next(&ac, &av);
1.258 djm 1454: if (!arg || *arg == '\0')
1455: fatal("%s line %d: Missing argument.",
1456: filename, linenum);
1.304 djm 1457: if (*arg != '-' &&
1.352 naddy 1458: !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1459: arg + 1 : arg, 1))
1.258 djm 1460: fatal("%s line %d: Bad key types '%s'.",
1461: filename, linenum, arg ? arg : "<NONE>");
1462: if (*activep && *charptr == NULL)
1463: *charptr = xstrdup(arg);
1464: break;
1465:
1.276 markus 1466: case sHostKeyAlgorithms:
1467: charptr = &options->hostkeyalgorithms;
1.374 dtucker 1468: goto parse_pubkey_algos;
1.276 markus 1469:
1.341 djm 1470: case sCASignatureAlgorithms:
1471: charptr = &options->ca_sign_algorithms;
1.374 dtucker 1472: goto parse_pubkey_algos;
1.341 djm 1473:
1.94 markus 1474: case sPubkeyAuthentication:
1475: intptr = &options->pubkey_authentication;
1476: goto parse_flag;
1.119 jakob 1477:
1.374 dtucker 1478: case sPubkeyAcceptedAlgorithms:
1479: charptr = &options->pubkey_accepted_algos;
1480: goto parse_pubkey_algos;
1.258 djm 1481:
1.354 djm 1482: case sPubkeyAuthOptions:
1483: intptr = &options->pubkey_auth_options;
1484: value = 0;
1.380 djm 1485: while ((arg = argv_next(&ac, &av)) != NULL) {
1.354 djm 1486: if (strcasecmp(arg, "none") == 0)
1487: continue;
1488: if (strcasecmp(arg, "touch-required") == 0)
1489: value |= PUBKEYAUTH_TOUCH_REQUIRED;
1.368 djm 1490: else if (strcasecmp(arg, "verify-required") == 0)
1491: value |= PUBKEYAUTH_VERIFY_REQUIRED;
1.354 djm 1492: else {
1.380 djm 1493: error("%s line %d: unsupported %s option %s",
1494: filename, linenum, keyword, arg);
1495: goto out;
1.354 djm 1496: }
1497: }
1498: if (*activep && *intptr == -1)
1499: *intptr = value;
1500: break;
1501:
1.94 markus 1502: case sKerberosAuthentication:
1503: intptr = &options->kerberos_authentication;
1504: goto parse_flag;
1505:
1506: case sKerberosOrLocalPasswd:
1507: intptr = &options->kerberos_or_local_passwd;
1508: goto parse_flag;
1509:
1510: case sKerberosTicketCleanup:
1511: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1512: goto parse_flag;
1513:
1514: case sKerberosGetAFSToken:
1515: intptr = &options->kerberos_get_afs_token;
1.125 markus 1516: goto parse_flag;
1517:
1518: case sGssAuthentication:
1519: intptr = &options->gss_authentication;
1520: goto parse_flag;
1521:
1522: case sGssCleanupCreds:
1523: intptr = &options->gss_cleanup_creds;
1.271 djm 1524: goto parse_flag;
1525:
1526: case sGssStrictAcceptor:
1527: intptr = &options->gss_strict_acceptor;
1.94 markus 1528: goto parse_flag;
1529:
1530: case sPasswordAuthentication:
1531: intptr = &options->password_authentication;
1532: goto parse_flag;
1533:
1534: case sKbdInteractiveAuthentication:
1535: intptr = &options->kbd_interactive_authentication;
1536: goto parse_flag;
1537:
1538: case sPrintMotd:
1539: intptr = &options->print_motd;
1540: goto parse_flag;
1541:
1542: case sPrintLastLog:
1543: intptr = &options->print_lastlog;
1544: goto parse_flag;
1545:
1546: case sX11Forwarding:
1547: intptr = &options->x11_forwarding;
1548: goto parse_flag;
1549:
1550: case sX11DisplayOffset:
1551: intptr = &options->x11_display_offset;
1.293 naddy 1552: parse_int:
1.380 djm 1553: arg = argv_next(&ac, &av);
1.322 dtucker 1554: if ((errstr = atoi_err(arg, &value)) != NULL)
1.380 djm 1555: fatal("%s line %d: %s integer value %s.",
1556: filename, linenum, keyword, errstr);
1.293 naddy 1557: if (*activep && *intptr == -1)
1558: *intptr = value;
1559: break;
1.99 stevesk 1560:
1561: case sX11UseLocalhost:
1562: intptr = &options->x11_use_localhost;
1563: goto parse_flag;
1.94 markus 1564:
1565: case sXAuthLocation:
1566: charptr = &options->xauth_location;
1567: goto parse_filename;
1568:
1.244 djm 1569: case sPermitTTY:
1570: intptr = &options->permit_tty;
1571: goto parse_flag;
1572:
1.250 djm 1573: case sPermitUserRC:
1574: intptr = &options->permit_user_rc;
1575: goto parse_flag;
1576:
1.94 markus 1577: case sStrictModes:
1578: intptr = &options->strict_modes;
1579: goto parse_flag;
1580:
1.129 markus 1581: case sTCPKeepAlive:
1582: intptr = &options->tcp_keep_alive;
1.94 markus 1583: goto parse_flag;
1584:
1585: case sEmptyPasswd:
1586: intptr = &options->permit_empty_passwd;
1.113 markus 1587: goto parse_flag;
1588:
1589: case sPermitUserEnvironment:
1590: intptr = &options->permit_user_env;
1.367 djm 1591: charptr = &options->permit_user_env_allowlist;
1.380 djm 1592: arg = argv_next(&ac, &av);
1.334 djm 1593: if (!arg || *arg == '\0')
1.380 djm 1594: fatal("%s line %d: %s missing argument.",
1595: filename, linenum, keyword);
1.334 djm 1596: value = 0;
1597: p = NULL;
1598: if (strcmp(arg, "yes") == 0)
1599: value = 1;
1600: else if (strcmp(arg, "no") == 0)
1601: value = 0;
1602: else {
1603: /* Pattern-list specified */
1604: value = 1;
1605: p = xstrdup(arg);
1606: }
1607: if (*activep && *intptr == -1) {
1608: *intptr = value;
1609: *charptr = p;
1610: p = NULL;
1611: }
1612: free(p);
1613: break;
1.94 markus 1614:
1.111 markus 1615: case sCompression:
1616: intptr = &options->compression;
1.220 djm 1617: multistate_ptr = multistate_compression;
1618: goto parse_multistate;
1.94 markus 1619:
1.235 dtucker 1620: case sRekeyLimit:
1.380 djm 1621: arg = argv_next(&ac, &av);
1.235 dtucker 1622: if (!arg || *arg == '\0')
1.380 djm 1623: fatal("%s line %d: %s missing argument.",
1624: filename, linenum, keyword);
1.235 dtucker 1625: if (strcmp(arg, "default") == 0) {
1626: val64 = 0;
1627: } else {
1.236 dtucker 1628: if (scan_scaled(arg, &val64) == -1)
1.380 djm 1629: fatal("%.200s line %d: Bad %s number '%s': %s",
1630: filename, linenum, keyword,
1631: arg, strerror(errno));
1.235 dtucker 1632: if (val64 != 0 && val64 < 16)
1.380 djm 1633: fatal("%.200s line %d: %s too small",
1634: filename, linenum, keyword);
1.235 dtucker 1635: }
1636: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1637: options->rekey_limit = val64;
1.380 djm 1638: if (ac != 0) { /* optional rekey interval present */
1639: if (strcmp(av[0], "none") == 0) {
1640: (void)argv_next(&ac, &av); /* discard */
1.235 dtucker 1641: break;
1642: }
1643: intptr = &options->rekey_interval;
1644: goto parse_time;
1645: }
1646: break;
1647:
1.94 markus 1648: case sGatewayPorts:
1.251 millert 1649: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1650: multistate_ptr = multistate_gatewayports;
1651: goto parse_multistate;
1.25 markus 1652:
1.122 markus 1653: case sUseDNS:
1654: intptr = &options->use_dns;
1.94 markus 1655: goto parse_flag;
1.53 markus 1656:
1.94 markus 1657: case sLogFacility:
1.174 dtucker 1658: log_facility_ptr = &options->log_facility;
1.380 djm 1659: arg = argv_next(&ac, &av);
1.94 markus 1660: value = log_facility_number(arg);
1.101 markus 1661: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1662: fatal("%.200s line %d: unsupported log facility '%s'",
1663: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1664: if (*log_facility_ptr == -1)
1665: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1666: break;
1.25 markus 1667:
1.94 markus 1668: case sLogLevel:
1.174 dtucker 1669: log_level_ptr = &options->log_level;
1.380 djm 1670: arg = argv_next(&ac, &av);
1.94 markus 1671: value = log_level_number(arg);
1.101 markus 1672: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1673: fatal("%.200s line %d: unsupported log level '%s'",
1674: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1675: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1676: *log_level_ptr = (LogLevel) value;
1.94 markus 1677: break;
1678:
1.370 djm 1679: case sLogVerbose:
1.380 djm 1680: found = options->num_log_verbose == 0;
1681: i = 0;
1682: while ((arg = argv_next(&ac, &av)) != NULL) {
1683: if (*arg == '\0') {
1684: error("%s line %d: keyword %s empty argument",
1685: filename, linenum, keyword);
1686: goto out;
1687: }
1688: /* Allow "none" only in first position */
1689: if (strcasecmp(arg, "none") == 0) {
1690: if (i > 0 || ac > 0) {
1691: error("%s line %d: keyword %s \"none\" "
1692: "argument must appear alone.",
1693: filename, linenum, keyword);
1694: goto out;
1695: }
1696: }
1697: i++;
1698: if (!found || !*activep)
1.370 djm 1699: continue;
1.380 djm 1700: opt_array_append(filename, linenum, keyword,
1.370 djm 1701: &options->log_verbose, &options->num_log_verbose,
1702: arg);
1703: }
1704: break;
1705:
1.94 markus 1706: case sAllowTcpForwarding:
1707: intptr = &options->allow_tcp_forwarding;
1.233 djm 1708: multistate_ptr = multistate_tcpfwd;
1709: goto parse_multistate;
1.102 provos 1710:
1.251 millert 1711: case sAllowStreamLocalForwarding:
1712: intptr = &options->allow_streamlocal_forwarding;
1713: multistate_ptr = multistate_tcpfwd;
1714: goto parse_multistate;
1715:
1.178 pyr 1716: case sAllowAgentForwarding:
1717: intptr = &options->allow_agent_forwarding;
1718: goto parse_flag;
1719:
1.301 djm 1720: case sDisableForwarding:
1721: intptr = &options->disable_forwarding;
1722: goto parse_flag;
1723:
1.94 markus 1724: case sAllowUsers:
1.380 djm 1725: chararrayptr = &options->allow_users;
1726: uintptr = &options->num_allow_users;
1727: parse_allowdenyusers:
1728: while ((arg = argv_next(&ac, &av)) != NULL) {
1729: if (*arg == '\0' ||
1730: match_user(NULL, NULL, NULL, arg) == -1)
1731: fatal("%s line %d: invalid %s pattern: \"%s\"",
1732: filename, linenum, keyword, arg);
1.227 markus 1733: if (!*activep)
1734: continue;
1.380 djm 1735: opt_array_append(filename, linenum, keyword,
1736: chararrayptr, uintptr, arg);
1.94 markus 1737: }
1738: break;
1.25 markus 1739:
1.94 markus 1740: case sDenyUsers:
1.380 djm 1741: chararrayptr = &options->deny_users;
1742: uintptr = &options->num_deny_users;
1743: goto parse_allowdenyusers;
1.25 markus 1744:
1.94 markus 1745: case sAllowGroups:
1.380 djm 1746: chararrayptr = &options->allow_groups;
1747: uintptr = &options->num_allow_groups;
1748: parse_allowdenygroups:
1749: while ((arg = argv_next(&ac, &av)) != NULL) {
1750: if (*arg == '\0')
1751: fatal("%s line %d: empty %s pattern",
1752: filename, linenum, keyword);
1.227 markus 1753: if (!*activep)
1754: continue;
1.380 djm 1755: opt_array_append(filename, linenum, keyword,
1756: chararrayptr, uintptr, arg);
1.94 markus 1757: }
1758: break;
1.33 markus 1759:
1.94 markus 1760: case sDenyGroups:
1.380 djm 1761: chararrayptr = &options->deny_groups;
1762: uintptr = &options->num_deny_groups;
1763: goto parse_allowdenygroups;
1.66 markus 1764:
1.94 markus 1765: case sCiphers:
1.380 djm 1766: arg = argv_next(&ac, &av);
1.94 markus 1767: if (!arg || *arg == '\0')
1.380 djm 1768: fatal("%s line %d: %s missing argument.",
1769: filename, linenum, keyword);
1.352 naddy 1770: if (*arg != '-' &&
1771: !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1772: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1773: filename, linenum, arg ? arg : "<NONE>");
1774: if (options->ciphers == NULL)
1775: options->ciphers = xstrdup(arg);
1776: break;
1.33 markus 1777:
1.94 markus 1778: case sMacs:
1.380 djm 1779: arg = argv_next(&ac, &av);
1.94 markus 1780: if (!arg || *arg == '\0')
1.380 djm 1781: fatal("%s line %d: %s missing argument.",
1782: filename, linenum, keyword);
1.352 naddy 1783: if (*arg != '-' &&
1784: !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1785: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1786: filename, linenum, arg ? arg : "<NONE>");
1787: if (options->macs == NULL)
1788: options->macs = xstrdup(arg);
1.211 djm 1789: break;
1790:
1791: case sKexAlgorithms:
1.380 djm 1792: arg = argv_next(&ac, &av);
1.211 djm 1793: if (!arg || *arg == '\0')
1.380 djm 1794: fatal("%s line %d: %s missing argument.",
1795: filename, linenum, keyword);
1.304 djm 1796: if (*arg != '-' &&
1.352 naddy 1797: !kex_names_valid(*arg == '+' || *arg == '^' ?
1798: arg + 1 : arg))
1.211 djm 1799: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1800: filename, linenum, arg ? arg : "<NONE>");
1801: if (options->kex_algorithms == NULL)
1802: options->kex_algorithms = xstrdup(arg);
1.94 markus 1803: break;
1.43 jakob 1804:
1.94 markus 1805: case sSubsystem:
1806: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1807: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1808: filename, linenum);
1.94 markus 1809: }
1.380 djm 1810: arg = argv_next(&ac, &av);
1.94 markus 1811: if (!arg || *arg == '\0')
1.380 djm 1812: fatal("%s line %d: %s missing argument.",
1813: filename, linenum, keyword);
1.153 dtucker 1814: if (!*activep) {
1.380 djm 1815: arg = argv_next(&ac, &av);
1.153 dtucker 1816: break;
1817: }
1.94 markus 1818: for (i = 0; i < options->num_subsystems; i++)
1819: if (strcmp(arg, options->subsystem_name[i]) == 0)
1.380 djm 1820: fatal("%s line %d: Subsystem '%s' "
1821: "already defined.", filename, linenum, arg);
1.94 markus 1822: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1.380 djm 1823: arg = argv_next(&ac, &av);
1.94 markus 1824: if (!arg || *arg == '\0')
1825: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1826: filename, linenum);
1.94 markus 1827: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1828:
1829: /* Collect arguments (separate to executable) */
1830: p = xstrdup(arg);
1831: len = strlen(p) + 1;
1.380 djm 1832: while ((arg = argv_next(&ac, &av)) != NULL) {
1.151 djm 1833: len += 1 + strlen(arg);
1.264 deraadt 1834: p = xreallocarray(p, 1, len);
1.151 djm 1835: strlcat(p, " ", len);
1836: strlcat(p, arg, len);
1837: }
1838: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1839: options->num_subsystems++;
1840: break;
1.46 markus 1841:
1.94 markus 1842: case sMaxStartups:
1.380 djm 1843: arg = argv_next(&ac, &av);
1.94 markus 1844: if (!arg || *arg == '\0')
1.380 djm 1845: fatal("%s line %d: %s missing argument.",
1846: filename, linenum, keyword);
1.94 markus 1847: if ((n = sscanf(arg, "%d:%d:%d",
1848: &options->max_startups_begin,
1849: &options->max_startups_rate,
1850: &options->max_startups)) == 3) {
1851: if (options->max_startups_begin >
1852: options->max_startups ||
1853: options->max_startups_rate > 100 ||
1854: options->max_startups_rate < 1)
1.380 djm 1855: fatal("%s line %d: Invalid %s spec.",
1856: filename, linenum, keyword);
1.94 markus 1857: } else if (n != 1)
1.380 djm 1858: fatal("%s line %d: Invalid %s spec.",
1859: filename, linenum, keyword);
1.94 markus 1860: else
1861: options->max_startups = options->max_startups_begin;
1862: break;
1.133 dtucker 1863:
1.372 dtucker 1864: case sPerSourceNetBlockSize:
1.380 djm 1865: arg = argv_next(&ac, &av);
1.372 dtucker 1866: if (!arg || *arg == '\0')
1.380 djm 1867: fatal("%s line %d: %s missing argument.",
1868: filename, linenum, keyword);
1.372 dtucker 1869: switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
1870: case 2:
1871: if (value2 < 0 || value2 > 128)
1872: n = -1;
1873: /* FALLTHROUGH */
1874: case 1:
1875: if (value < 0 || value > 32)
1876: n = -1;
1877: }
1878: if (n != 1 && n != 2)
1.380 djm 1879: fatal("%s line %d: Invalid %s spec.",
1880: filename, linenum, keyword);
1.372 dtucker 1881: if (*activep) {
1882: options->per_source_masklen_ipv4 = value;
1883: options->per_source_masklen_ipv6 = value2;
1884: }
1885: break;
1886:
1887: case sPerSourceMaxStartups:
1.380 djm 1888: arg = argv_next(&ac, &av);
1.372 dtucker 1889: if (!arg || *arg == '\0')
1.380 djm 1890: fatal("%s line %d: %s missing argument.",
1891: filename, linenum, keyword);
1.372 dtucker 1892: if (strcmp(arg, "none") == 0) { /* no limit */
1893: value = INT_MAX;
1894: } else {
1895: if ((errstr = atoi_err(arg, &value)) != NULL)
1.380 djm 1896: fatal("%s line %d: %s integer value %s.",
1897: filename, linenum, keyword, errstr);
1.372 dtucker 1898: }
1899: if (*activep)
1900: options->per_source_max_startups = value;
1901: break;
1902:
1.133 dtucker 1903: case sMaxAuthTries:
1904: intptr = &options->max_authtries;
1905: goto parse_int;
1.94 markus 1906:
1.180 djm 1907: case sMaxSessions:
1908: intptr = &options->max_sessions;
1909: goto parse_int;
1910:
1.94 markus 1911: case sBanner:
1912: charptr = &options->banner;
1913: goto parse_filename;
1.176 djm 1914:
1.94 markus 1915: /*
1916: * These options can contain %X options expanded at
1917: * connect time, so that you can specify paths like:
1918: *
1919: * AuthorizedKeysFile /etc/ssh_keys/%u
1920: */
1921: case sAuthorizedKeysFile:
1.380 djm 1922: uvalue = options->num_authkeys_files;
1923: while ((arg = argv_next(&ac, &av)) != NULL) {
1924: if (*arg == '\0') {
1925: error("%s line %d: keyword %s empty argument",
1926: filename, linenum, keyword);
1927: goto out;
1928: }
1929: arg2 = tilde_expand_filename(arg, getuid());
1930: if (*activep && uvalue == 0) {
1931: opt_array_append(filename, linenum, keyword,
1.314 djm 1932: &options->authorized_keys_files,
1.380 djm 1933: &options->num_authkeys_files, arg2);
1.219 djm 1934: }
1.380 djm 1935: free(arg2);
1.219 djm 1936: }
1.380 djm 1937: break;
1.219 djm 1938:
1.208 djm 1939: case sAuthorizedPrincipalsFile:
1940: charptr = &options->authorized_principals_file;
1.380 djm 1941: arg = argv_next(&ac, &av);
1.205 djm 1942: if (!arg || *arg == '\0')
1.380 djm 1943: fatal("%s line %d: %s missing argument.",
1944: filename, linenum, keyword);
1.205 djm 1945: if (*activep && *charptr == NULL) {
1.206 markus 1946: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1947: /* increase optional counter */
1948: if (intptr != NULL)
1949: *intptr = *intptr + 1;
1950: }
1951: break;
1.94 markus 1952:
1953: case sClientAliveInterval:
1954: intptr = &options->client_alive_interval;
1955: goto parse_time;
1956:
1957: case sClientAliveCountMax:
1958: intptr = &options->client_alive_count_max;
1959: goto parse_int;
1.131 djm 1960:
1961: case sAcceptEnv:
1.380 djm 1962: while ((arg = argv_next(&ac, &av)) != NULL) {
1963: if (*arg == '\0' || strchr(arg, '=') != NULL)
1.131 djm 1964: fatal("%s line %d: Invalid environment name.",
1965: filename, linenum);
1.153 dtucker 1966: if (!*activep)
1.227 markus 1967: continue;
1.380 djm 1968: opt_array_append(filename, linenum, keyword,
1.314 djm 1969: &options->accept_env, &options->num_accept_env,
1970: arg);
1.131 djm 1971: }
1972: break;
1.145 reyk 1973:
1.332 djm 1974: case sSetEnv:
1975: uvalue = options->num_setenv;
1.380 djm 1976: while ((arg = argv_next(&ac, &av)) != NULL) {
1977: if (*arg == '\0' || strchr(arg, '=') == NULL)
1.332 djm 1978: fatal("%s line %d: Invalid environment.",
1979: filename, linenum);
1980: if (!*activep || uvalue != 0)
1981: continue;
1.380 djm 1982: opt_array_append(filename, linenum, keyword,
1.332 djm 1983: &options->setenv, &options->num_setenv, arg);
1984: }
1985: break;
1986:
1.145 reyk 1987: case sPermitTunnel:
1988: intptr = &options->permit_tun;
1.380 djm 1989: arg = argv_next(&ac, &av);
1.146 reyk 1990: if (!arg || *arg == '\0')
1.380 djm 1991: fatal("%s line %d: %s missing argument.",
1992: filename, linenum, keyword);
1.182 dtucker 1993: value = -1;
1994: for (i = 0; tunmode_desc[i].val != -1; i++)
1995: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1996: value = tunmode_desc[i].val;
1997: break;
1998: }
1999: if (value == -1)
1.380 djm 2000: fatal("%s line %d: bad %s argument %s",
2001: filename, linenum, keyword, arg);
1.268 djm 2002: if (*activep && *intptr == -1)
1.146 reyk 2003: *intptr = value;
2004: break;
1.94 markus 2005:
1.360 djm 2006: case sInclude:
2007: if (cmdline) {
2008: fatal("Include directive not supported as a "
2009: "command-line option");
2010: }
2011: value = 0;
1.380 djm 2012: while ((arg2 = argv_next(&ac, &av)) != NULL) {
2013: if (*arg2 == '\0') {
2014: error("%s line %d: keyword %s empty argument",
2015: filename, linenum, keyword);
2016: goto out;
2017: }
1.360 djm 2018: value++;
2019: found = 0;
2020: if (*arg2 != '/' && *arg2 != '~') {
1.361 markus 2021: xasprintf(&arg, "%s/%s", SSHDIR, arg2);
1.360 djm 2022: } else
2023: arg = xstrdup(arg2);
2024:
2025: /*
2026: * Don't let included files clobber the containing
2027: * file's Match state.
2028: */
2029: oactive = *activep;
2030:
2031: /* consult cache of include files */
2032: TAILQ_FOREACH(item, includes, entry) {
2033: if (strcmp(item->selector, arg) != 0)
2034: continue;
2035: if (item->filename != NULL) {
2036: parse_server_config_depth(options,
2037: item->filename, item->contents,
2038: includes, connectinfo,
1.365 djm 2039: (*inc_flags & SSHCFG_MATCH_ONLY
2040: ? SSHCFG_MATCH_ONLY : (oactive
2041: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2042: activep, depth + 1);
2043: }
2044: found = 1;
2045: *activep = oactive;
2046: }
2047: if (found != 0) {
2048: free(arg);
2049: continue;
2050: }
2051:
2052: /* requested glob was not in cache */
2053: debug2("%s line %d: new include %s",
2054: filename, linenum, arg);
2055: if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
2056: if (r != GLOB_NOMATCH) {
1.380 djm 2057: fatal("%s line %d: include \"%s\" glob "
2058: "failed", filename, linenum, arg);
1.360 djm 2059: }
2060: /*
2061: * If no entry matched then record a
2062: * placeholder to skip later glob calls.
2063: */
2064: debug2("%s line %d: no match for %s",
2065: filename, linenum, arg);
2066: item = xcalloc(1, sizeof(*item));
2067: item->selector = strdup(arg);
2068: TAILQ_INSERT_TAIL(includes,
2069: item, entry);
2070: }
2071: if (gbuf.gl_pathc > INT_MAX)
1.371 djm 2072: fatal_f("too many glob results");
1.360 djm 2073: for (n = 0; n < (int)gbuf.gl_pathc; n++) {
2074: debug2("%s line %d: including %s",
2075: filename, linenum, gbuf.gl_pathv[n]);
2076: item = xcalloc(1, sizeof(*item));
2077: item->selector = strdup(arg);
2078: item->filename = strdup(gbuf.gl_pathv[n]);
1.371 djm 2079: if ((item->contents = sshbuf_new()) == NULL)
2080: fatal_f("sshbuf_new failed");
1.360 djm 2081: load_server_config(item->filename,
2082: item->contents);
2083: parse_server_config_depth(options,
2084: item->filename, item->contents,
2085: includes, connectinfo,
1.365 djm 2086: (*inc_flags & SSHCFG_MATCH_ONLY
2087: ? SSHCFG_MATCH_ONLY : (oactive
2088: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2089: activep, depth + 1);
2090: *activep = oactive;
2091: TAILQ_INSERT_TAIL(includes, item, entry);
2092: }
2093: globfree(&gbuf);
2094: free(arg);
2095: }
2096: if (value == 0) {
1.380 djm 2097: fatal("%s line %d: %s missing filename argument",
2098: filename, linenum, keyword);
1.360 djm 2099: }
2100: break;
2101:
1.153 dtucker 2102: case sMatch:
2103: if (cmdline)
2104: fatal("Match directive not supported as a command-line "
1.379 djm 2105: "option");
1.380 djm 2106: value = match_cfg_line(&str, linenum,
1.365 djm 2107: (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
1.153 dtucker 2108: if (value < 0)
2109: fatal("%s line %d: Bad Match condition", filename,
2110: linenum);
1.365 djm 2111: *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
1.380 djm 2112: /*
2113: * The MATCH_ONLY flag is applicable only until the first
2114: * match block.
2115: */
1.365 djm 2116: *inc_flags &= ~SSHCFG_MATCH_ONLY;
1.380 djm 2117: /*
2118: * If match_cfg_line() didn't consume all its arguments then
2119: * arrange for the extra arguments check below to fail.
2120: */
2121: if (str == NULL || *str == '\0')
2122: argv_consume(&ac);
1.156 dtucker 2123: break;
2124:
1.330 djm 2125: case sPermitListen:
1.156 dtucker 2126: case sPermitOpen:
1.330 djm 2127: if (opcode == sPermitListen) {
2128: uintptr = &options->num_permitted_listens;
2129: chararrayptr = &options->permitted_listens;
1.329 djm 2130: } else {
2131: uintptr = &options->num_permitted_opens;
2132: chararrayptr = &options->permitted_opens;
2133: }
1.380 djm 2134: arg = argv_next(&ac, &av);
1.156 dtucker 2135: if (!arg || *arg == '\0')
1.380 djm 2136: fatal("%s line %d: %s missing argument.",
2137: filename, linenum, keyword);
1.329 djm 2138: uvalue = *uintptr; /* modified later */
1.310 djm 2139: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 djm 2140: if (*activep && uvalue == 0) {
2141: *uintptr = 1;
2142: *chararrayptr = xcalloc(1,
2143: sizeof(**chararrayptr));
2144: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 2145: }
1.156 dtucker 2146: break;
2147: }
1.380 djm 2148: for (; arg != NULL && *arg != '\0'; arg = argv_next(&ac, &av)) {
1.333 djm 2149: if (opcode == sPermitListen &&
2150: strchr(arg, ':') == NULL) {
2151: /*
2152: * Allow bare port number for PermitListen
2153: * to indicate a wildcard listen host.
2154: */
2155: xasprintf(&arg2, "*:%s", arg);
2156: } else {
2157: arg2 = xstrdup(arg);
1.348 dtucker 2158: ch = '\0';
1.347 dtucker 2159: p = hpdelim2(&arg, &ch);
2160: if (p == NULL || ch == '/') {
1.380 djm 2161: fatal("%s line %d: %s missing host",
2162: filename, linenum, keyword);
1.333 djm 2163: }
2164: p = cleanhostname(p);
1.329 djm 2165: }
2166: if (arg == NULL ||
2167: ((port = permitopen_port(arg)) < 0)) {
1.380 djm 2168: fatal("%s line %d: %s bad port number",
2169: filename, linenum, keyword);
1.329 djm 2170: }
2171: if (*activep && uvalue == 0) {
1.380 djm 2172: opt_array_append(filename, linenum, keyword,
1.329 djm 2173: chararrayptr, uintptr, arg2);
1.314 djm 2174: }
2175: free(arg2);
1.159 dtucker 2176: }
1.153 dtucker 2177: break;
2178:
1.158 dtucker 2179: case sForceCommand:
1.380 djm 2180: if (str == NULL || *str == '\0')
2181: fatal("%s line %d: %s missing argument.",
2182: filename, linenum, keyword);
2183: len = strspn(str, WHITESPACE);
1.158 dtucker 2184: if (*activep && options->adm_forced_command == NULL)
1.380 djm 2185: options->adm_forced_command = xstrdup(str + len);
2186: argv_consume(&ac);
2187: break;
1.158 dtucker 2188:
1.176 djm 2189: case sChrootDirectory:
2190: charptr = &options->chroot_directory;
1.177 djm 2191:
1.380 djm 2192: arg = argv_next(&ac, &av);
1.177 djm 2193: if (!arg || *arg == '\0')
1.380 djm 2194: fatal("%s line %d: %s missing argument.",
2195: filename, linenum, keyword);
1.177 djm 2196: if (*activep && *charptr == NULL)
2197: *charptr = xstrdup(arg);
2198: break;
1.176 djm 2199:
1.204 djm 2200: case sTrustedUserCAKeys:
2201: charptr = &options->trusted_user_ca_keys;
2202: goto parse_filename;
2203:
2204: case sRevokedKeys:
2205: charptr = &options->revoked_keys_file;
2206: goto parse_filename;
2207:
1.355 djm 2208: case sSecurityKeyProvider:
2209: charptr = &options->sk_provider;
1.380 djm 2210: arg = argv_next(&ac, &av);
1.356 djm 2211: if (!arg || *arg == '\0')
1.380 djm 2212: fatal("%s line %d: %s missing argument.",
2213: filename, linenum, keyword);
1.356 djm 2214: if (*activep && *charptr == NULL) {
2215: *charptr = strcasecmp(arg, "internal") == 0 ?
2216: xstrdup(arg) : derelativise_path(arg);
2217: /* increase optional counter */
2218: if (intptr != NULL)
2219: *intptr = *intptr + 1;
2220: }
2221: break;
1.355 djm 2222:
1.213 djm 2223: case sIPQoS:
1.380 djm 2224: arg = argv_next(&ac, &av);
2225: if (!arg || *arg == '\0')
2226: fatal("%s line %d: %s missing argument.",
2227: filename, linenum, keyword);
1.213 djm 2228: if ((value = parse_ipqos(arg)) == -1)
1.380 djm 2229: fatal("%s line %d: Bad %s value: %s",
2230: filename, linenum, keyword, arg);
2231: arg = argv_next(&ac, &av);
1.213 djm 2232: if (arg == NULL)
2233: value2 = value;
2234: else if ((value2 = parse_ipqos(arg)) == -1)
1.380 djm 2235: fatal("%s line %d: Bad %s value: %s",
2236: filename, linenum, keyword, arg);
1.213 djm 2237: if (*activep) {
2238: options->ip_qos_interactive = value;
2239: options->ip_qos_bulk = value2;
2240: }
2241: break;
2242:
1.225 djm 2243: case sVersionAddendum:
1.380 djm 2244: if (str == NULL || *str == '\0')
2245: fatal("%s line %d: %s missing argument.",
2246: filename, linenum, keyword);
2247: len = strspn(str, WHITESPACE);
2248: if (strchr(str + len, '\r') != NULL) {
2249: fatal("%.200s line %d: Invalid %s argument",
2250: filename, linenum, keyword);
2251: }
2252: if ((arg = strchr(line, '#')) != NULL) {
2253: *arg = '\0';
2254: rtrim(line);
2255: }
1.225 djm 2256: if (*activep && options->version_addendum == NULL) {
1.380 djm 2257: if (strcasecmp(str + len, "none") == 0)
1.225 djm 2258: options->version_addendum = xstrdup("");
2259: else
1.380 djm 2260: options->version_addendum = xstrdup(str + len);
1.225 djm 2261: }
1.380 djm 2262: argv_consume(&ac);
2263: break;
1.225 djm 2264:
1.231 djm 2265: case sAuthorizedKeysCommand:
1.380 djm 2266: charptr = &options->authorized_keys_command;
2267: parse_command:
2268: len = strspn(str, WHITESPACE);
2269: if (str[len] != '/' && strcasecmp(str + len, "none") != 0) {
2270: fatal("%.200s line %d: %s must be an absolute path",
2271: filename, linenum, keyword);
2272: }
2273: if (*activep && options->authorized_keys_command == NULL)
2274: *charptr = xstrdup(str + len);
2275: argv_consume(&ac);
2276: break;
1.231 djm 2277:
2278: case sAuthorizedKeysCommandUser:
2279: charptr = &options->authorized_keys_command_user;
1.380 djm 2280: parse_localuser:
2281: arg = argv_next(&ac, &av);
2282: if (!arg || *arg == '\0') {
2283: fatal("%s line %d: missing %s argument.",
2284: filename, linenum, keyword);
2285: }
1.231 djm 2286: if (*activep && *charptr == NULL)
2287: *charptr = xstrdup(arg);
2288: break;
2289:
1.270 djm 2290: case sAuthorizedPrincipalsCommand:
1.380 djm 2291: charptr = &options->authorized_principals_command;
2292: goto parse_command;
1.270 djm 2293:
2294: case sAuthorizedPrincipalsCommandUser:
2295: charptr = &options->authorized_principals_command_user;
1.380 djm 2296: goto parse_localuser;
1.270 djm 2297:
1.232 djm 2298: case sAuthenticationMethods:
1.380 djm 2299: found = options->num_auth_methods == 0;
2300: value = 0; /* seen "any" pseudo-method */
2301: value2 = 0; /* successfully parsed any method */
2302: while ((arg = argv_next(&ac, &av)) != NULL) {
2303: if (strcmp(arg, "any") == 0) {
2304: if (options->num_auth_methods > 0) {
2305: fatal("%s line %d: \"any\" must "
2306: "appear alone in %s",
2307: filename, linenum, keyword);
1.291 djm 2308: }
1.380 djm 2309: value = 1;
2310: } else if (value) {
2311: fatal("%s line %d: \"any\" must appear "
2312: "alone in %s", filename, linenum, keyword);
2313: } else if (auth2_methods_valid(arg, 0) != 0) {
2314: fatal("%s line %d: invalid %s method list.",
2315: filename, linenum, keyword);
1.291 djm 2316: }
1.380 djm 2317: value2 = 1;
2318: if (!found || !*activep)
2319: continue;
2320: opt_array_append(filename, linenum, keyword,
2321: &options->auth_methods,
2322: &options->num_auth_methods, arg);
2323: }
2324: if (value2 == 0) {
2325: fatal("%s line %d: no %s specified",
2326: filename, linenum, keyword);
1.232 djm 2327: }
1.380 djm 2328: break;
1.232 djm 2329:
1.251 millert 2330: case sStreamLocalBindMask:
1.380 djm 2331: arg = argv_next(&ac, &av);
1.251 millert 2332: if (!arg || *arg == '\0')
1.380 djm 2333: fatal("%s line %d: %s missing argument.",
2334: filename, linenum, keyword);
1.251 millert 2335: /* Parse mode in octal format */
2336: value = strtol(arg, &p, 8);
2337: if (arg == p || value < 0 || value > 0777)
1.380 djm 2338: fatal("%s line %d: Invalid %s.",
2339: filename, linenum, keyword);
1.268 djm 2340: if (*activep)
2341: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 2342: break;
2343:
2344: case sStreamLocalBindUnlink:
2345: intptr = &options->fwd_opts.streamlocal_bind_unlink;
2346: goto parse_flag;
2347:
1.256 djm 2348: case sFingerprintHash:
1.380 djm 2349: arg = argv_next(&ac, &av);
1.256 djm 2350: if (!arg || *arg == '\0')
1.380 djm 2351: fatal("%s line %d: %s missing argument.",
2352: filename, linenum, keyword);
1.256 djm 2353: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1.380 djm 2354: fatal("%.200s line %d: Invalid %s algorithm \"%s\".",
2355: filename, linenum, keyword, arg);
1.256 djm 2356: if (*activep)
2357: options->fingerprint_hash = value;
2358: break;
2359:
1.309 djm 2360: case sExposeAuthInfo:
2361: intptr = &options->expose_userauth_info;
2362: goto parse_flag;
2363:
1.316 djm 2364: case sRDomain:
2365: charptr = &options->routing_domain;
1.380 djm 2366: arg = argv_next(&ac, &av);
1.316 djm 2367: if (!arg || *arg == '\0')
1.380 djm 2368: fatal("%s line %d: %s missing argument.",
2369: filename, linenum, keyword);
1.316 djm 2370: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2371: !valid_rdomain(arg))
1.380 djm 2372: fatal("%s line %d: invalid routing domain",
1.316 djm 2373: filename, linenum);
2374: if (*activep && *charptr == NULL)
2375: *charptr = xstrdup(arg);
1.321 dtucker 2376: break;
1.316 djm 2377:
1.94 markus 2378: case sDeprecated:
1.295 djm 2379: case sIgnore:
1.121 jakob 2380: case sUnsupported:
1.295 djm 2381: do_log2(opcode == sIgnore ?
2382: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2383: "%s line %d: %s option %s", filename, linenum,
1.380 djm 2384: opcode == sUnsupported ? "Unsupported" : "Deprecated",
2385: keyword);
2386: argv_consume(&ac);
1.94 markus 2387: break;
2388:
2389: default:
2390: fatal("%s line %d: Missing handler for opcode %s (%d)",
1.380 djm 2391: filename, linenum, keyword, opcode);
2392: }
2393: /* Check that there is no garbage at end of line. */
2394: if (ac > 0) {
2395: error("%.200s line %d: keyword %s extra arguments "
2396: "at end of line", filename, linenum, keyword);
2397: goto out;
1.94 markus 2398: }
1.380 djm 2399:
2400: /* success */
2401: ret = 0;
2402: out:
2403: argv_free(oav, oac);
2404: return ret;
1.94 markus 2405: }
2406:
1.360 djm 2407: int
2408: process_server_config_line(ServerOptions *options, char *line,
2409: const char *filename, int linenum, int *activep,
2410: struct connection_info *connectinfo, struct include_list *includes)
2411: {
1.365 djm 2412: int inc_flags = 0;
2413:
1.360 djm 2414: return process_server_config_line_depth(options, line, filename,
1.365 djm 2415: linenum, activep, connectinfo, &inc_flags, 0, includes);
1.360 djm 2416: }
2417:
2418:
1.94 markus 2419: /* Reads the server configuration file. */
1.25 markus 2420:
1.94 markus 2421: void
1.338 markus 2422: load_server_config(const char *filename, struct sshbuf *conf)
1.94 markus 2423: {
1.366 markus 2424: struct stat st;
1.331 markus 2425: char *line = NULL, *cp;
2426: size_t linesize = 0;
1.94 markus 2427: FILE *f;
1.338 markus 2428: int r, lineno = 0;
1.81 stevesk 2429:
1.371 djm 2430: debug2_f("filename %s", filename);
1.134 djm 2431: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2432: perror(filename);
2433: exit(1);
2434: }
1.338 markus 2435: sshbuf_reset(conf);
1.366 markus 2436: /* grow buffer, so realloc is avoided for large config files */
2437: if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
1.379 djm 2438: (r = sshbuf_allocate(conf, st.st_size)) != 0)
1.371 djm 2439: fatal_fr(r, "allocate");
1.331 markus 2440: while (getline(&line, &linesize, f) != -1) {
1.229 dtucker 2441: lineno++;
1.134 djm 2442: /*
1.380 djm 2443: * Strip whitespace
1.135 deraadt 2444: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2445: * line numbers later for error messages
2446: */
2447: cp = line + strspn(line, " \t\r");
1.338 markus 2448: if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
1.371 djm 2449: fatal_fr(r, "sshbuf_put");
1.134 djm 2450: }
1.331 markus 2451: free(line);
1.338 markus 2452: if ((r = sshbuf_put_u8(conf, 0)) != 0)
1.371 djm 2453: fatal_fr(r, "sshbuf_put_u8");
1.134 djm 2454: fclose(f);
1.371 djm 2455: debug2_f("done config len = %zu", sshbuf_len(conf));
1.134 djm 2456: }
2457:
2458: void
1.226 dtucker 2459: parse_server_match_config(ServerOptions *options,
1.360 djm 2460: struct include_list *includes, struct connection_info *connectinfo)
1.153 dtucker 2461: {
2462: ServerOptions mo;
2463:
2464: initialize_server_options(&mo);
1.360 djm 2465: parse_server_config(&mo, "reprocess config", cfg, includes,
2466: connectinfo);
1.168 dtucker 2467: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2468: }
2469:
1.226 dtucker 2470: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2471: {
2472: char *p;
2473:
2474: while ((p = strsep(&spec, ",")) && *p != '\0') {
2475: if (strncmp(p, "addr=", 5) == 0) {
2476: ci->address = xstrdup(p + 5);
2477: } else if (strncmp(p, "host=", 5) == 0) {
2478: ci->host = xstrdup(p + 5);
2479: } else if (strncmp(p, "user=", 5) == 0) {
2480: ci->user = xstrdup(p + 5);
2481: } else if (strncmp(p, "laddr=", 6) == 0) {
2482: ci->laddress = xstrdup(p + 6);
1.317 djm 2483: } else if (strncmp(p, "rdomain=", 8) == 0) {
2484: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2485: } else if (strncmp(p, "lport=", 6) == 0) {
2486: ci->lport = a2port(p + 6);
2487: if (ci->lport == -1) {
2488: fprintf(stderr, "Invalid port '%s' in test mode"
1.379 djm 2489: " specification %s\n", p+6, p);
1.226 dtucker 2490: return -1;
2491: }
2492: } else {
2493: fprintf(stderr, "Invalid test mode specification %s\n",
1.379 djm 2494: p);
1.226 dtucker 2495: return -1;
2496: }
2497: }
2498: return 0;
2499: }
2500:
1.168 dtucker 2501: /*
2502: * Copy any supported values that are set.
2503: *
1.195 jj 2504: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2505: * array values that are not used pre-authentication, because any that we
1.328 djm 2506: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2507: */
1.153 dtucker 2508: void
1.168 dtucker 2509: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2510: {
1.247 djm 2511: #define M_CP_INTOPT(n) do {\
2512: if (src->n != -1) \
2513: dst->n = src->n; \
2514: } while (0)
2515:
1.168 dtucker 2516: M_CP_INTOPT(password_authentication);
2517: M_CP_INTOPT(gss_authentication);
2518: M_CP_INTOPT(pubkey_authentication);
1.354 djm 2519: M_CP_INTOPT(pubkey_auth_options);
1.168 dtucker 2520: M_CP_INTOPT(kerberos_authentication);
2521: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2522: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2523: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2524: M_CP_INTOPT(permit_root_login);
1.188 djm 2525: M_CP_INTOPT(permit_empty_passwd);
1.362 djm 2526: M_CP_INTOPT(ignore_rhosts);
1.168 dtucker 2527:
2528: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2529: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2530: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2531: M_CP_INTOPT(disable_forwarding);
1.309 djm 2532: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2533: M_CP_INTOPT(permit_tun);
1.251 millert 2534: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2535: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2536: M_CP_INTOPT(x11_display_offset);
2537: M_CP_INTOPT(x11_forwarding);
2538: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2539: M_CP_INTOPT(permit_tty);
1.250 djm 2540: M_CP_INTOPT(permit_user_rc);
1.180 djm 2541: M_CP_INTOPT(max_sessions);
1.184 dtucker 2542: M_CP_INTOPT(max_authtries);
1.300 markus 2543: M_CP_INTOPT(client_alive_count_max);
2544: M_CP_INTOPT(client_alive_interval);
1.213 djm 2545: M_CP_INTOPT(ip_qos_interactive);
2546: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2547: M_CP_INTOPT(rekey_limit);
2548: M_CP_INTOPT(rekey_interval);
1.308 djm 2549: M_CP_INTOPT(log_level);
1.289 djm 2550:
2551: /*
2552: * The bind_mask is a mode_t that may be unsigned, so we can't use
2553: * M_CP_INTOPT - it does a signed comparison that causes compiler
2554: * warnings.
2555: */
1.290 dtucker 2556: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2557: dst->fwd_opts.streamlocal_bind_mask =
2558: src->fwd_opts.streamlocal_bind_mask;
2559: }
1.247 djm 2560:
2561: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2562: #define M_CP_STROPT(n) do {\
2563: if (src->n != NULL && dst->n != src->n) { \
2564: free(dst->n); \
2565: dst->n = src->n; \
2566: } \
2567: } while(0)
1.314 djm 2568: #define M_CP_STRARRAYOPT(s, num_s) do {\
2569: u_int i; \
2570: if (src->num_s != 0) { \
2571: for (i = 0; i < dst->num_s; i++) \
2572: free(dst->s[i]); \
2573: free(dst->s); \
2574: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2575: for (i = 0; i < src->num_s; i++) \
2576: dst->s[i] = xstrdup(src->s[i]); \
2577: dst->num_s = src->num_s; \
1.312 djm 2578: } \
2579: } while(0)
1.168 dtucker 2580:
1.218 djm 2581: /* See comment in servconf.h */
2582: COPY_MATCH_STRING_OPTS();
1.282 djm 2583:
2584: /* Arguments that accept '+...' need to be expanded */
2585: assemble_algorithms(dst);
1.216 djm 2586:
1.217 dtucker 2587: /*
2588: * The only things that should be below this point are string options
2589: * which are only used after authentication.
2590: */
1.168 dtucker 2591: if (preauth)
2592: return;
1.219 djm 2593:
1.283 djm 2594: /* These options may be "none" to clear a global setting */
1.168 dtucker 2595: M_CP_STROPT(adm_forced_command);
1.283 djm 2596: if (option_clear_or_none(dst->adm_forced_command)) {
2597: free(dst->adm_forced_command);
2598: dst->adm_forced_command = NULL;
2599: }
1.176 djm 2600: M_CP_STROPT(chroot_directory);
1.283 djm 2601: if (option_clear_or_none(dst->chroot_directory)) {
2602: free(dst->chroot_directory);
2603: dst->chroot_directory = NULL;
2604: }
1.153 dtucker 2605: }
1.168 dtucker 2606:
2607: #undef M_CP_INTOPT
2608: #undef M_CP_STROPT
1.219 djm 2609: #undef M_CP_STRARRAYOPT
1.153 dtucker 2610:
1.360 djm 2611: #define SERVCONF_MAX_DEPTH 16
1.364 djm 2612: static void
1.360 djm 2613: parse_server_config_depth(ServerOptions *options, const char *filename,
2614: struct sshbuf *conf, struct include_list *includes,
2615: struct connection_info *connectinfo, int flags, int *activep, int depth)
1.134 djm 2616: {
1.360 djm 2617: int linenum, bad_options = 0;
1.136 dtucker 2618: char *cp, *obuf, *cbuf;
1.134 djm 2619:
1.360 djm 2620: if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2621: fatal("Too many recursive configuration includes");
2622:
1.371 djm 2623: debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
1.365 djm 2624: (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
1.134 djm 2625:
1.287 djm 2626: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
1.371 djm 2627: fatal_f("sshbuf_dup_string failed");
1.137 dtucker 2628: linenum = 1;
1.140 deraadt 2629: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.360 djm 2630: if (process_server_config_line_depth(options, cp,
1.365 djm 2631: filename, linenum++, activep, connectinfo, &flags,
1.360 djm 2632: depth, includes) != 0)
1.94 markus 2633: bad_options++;
1.1 deraadt 2634: }
1.239 djm 2635: free(obuf);
1.78 stevesk 2636: if (bad_options > 0)
2637: fatal("%s: terminating, %d bad configuration options",
2638: filename, bad_options);
1.360 djm 2639: }
2640:
2641: void
2642: parse_server_config(ServerOptions *options, const char *filename,
2643: struct sshbuf *conf, struct include_list *includes,
2644: struct connection_info *connectinfo)
2645: {
2646: int active = connectinfo ? 0 : 1;
2647: parse_server_config_depth(options, filename, conf, includes,
1.365 djm 2648: connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
1.364 djm 2649: process_queued_listen_addrs(options);
1.182 dtucker 2650: }
2651:
2652: static const char *
1.221 djm 2653: fmt_multistate_int(int val, const struct multistate *m)
2654: {
2655: u_int i;
2656:
2657: for (i = 0; m[i].key != NULL; i++) {
2658: if (m[i].value == val)
2659: return m[i].key;
2660: }
2661: return "UNKNOWN";
2662: }
2663:
2664: static const char *
1.182 dtucker 2665: fmt_intarg(ServerOpCodes code, int val)
2666: {
1.221 djm 2667: if (val == -1)
2668: return "unset";
2669: switch (code) {
2670: case sAddressFamily:
2671: return fmt_multistate_int(val, multistate_addressfamily);
2672: case sPermitRootLogin:
2673: return fmt_multistate_int(val, multistate_permitrootlogin);
2674: case sGatewayPorts:
2675: return fmt_multistate_int(val, multistate_gatewayports);
2676: case sCompression:
2677: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2678: case sAllowTcpForwarding:
2679: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2680: case sAllowStreamLocalForwarding:
2681: return fmt_multistate_int(val, multistate_tcpfwd);
1.363 djm 2682: case sIgnoreRhosts:
2683: return fmt_multistate_int(val, multistate_ignore_rhosts);
1.256 djm 2684: case sFingerprintHash:
2685: return ssh_digest_alg_name(val);
1.221 djm 2686: default:
2687: switch (val) {
2688: case 0:
2689: return "no";
2690: case 1:
2691: return "yes";
2692: default:
2693: return "UNKNOWN";
2694: }
1.182 dtucker 2695: }
2696: }
2697:
2698: static void
2699: dump_cfg_int(ServerOpCodes code, int val)
2700: {
2701: printf("%s %d\n", lookup_opcode_name(code), val);
2702: }
2703:
2704: static void
1.263 dtucker 2705: dump_cfg_oct(ServerOpCodes code, int val)
2706: {
2707: printf("%s 0%o\n", lookup_opcode_name(code), val);
2708: }
2709:
2710: static void
1.182 dtucker 2711: dump_cfg_fmtint(ServerOpCodes code, int val)
2712: {
2713: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2714: }
2715:
2716: static void
2717: dump_cfg_string(ServerOpCodes code, const char *val)
2718: {
1.257 djm 2719: printf("%s %s\n", lookup_opcode_name(code),
2720: val == NULL ? "none" : val);
1.182 dtucker 2721: }
2722:
2723: static void
2724: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2725: {
2726: u_int i;
2727:
2728: for (i = 0; i < count; i++)
1.219 djm 2729: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2730: }
2731:
2732: static void
2733: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2734: {
2735: u_int i;
2736:
1.291 djm 2737: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2738: return;
1.219 djm 2739: printf("%s", lookup_opcode_name(code));
2740: for (i = 0; i < count; i++)
2741: printf(" %s", vals[i]);
1.291 djm 2742: if (code == sAuthenticationMethods && count == 0)
2743: printf(" any");
1.219 djm 2744: printf("\n");
1.182 dtucker 2745: }
2746:
1.315 djm 2747: static char *
2748: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2749: {
1.315 djm 2750: int r;
1.182 dtucker 2751: struct addrinfo *ai;
1.315 djm 2752: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2753: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2754:
1.263 dtucker 2755: /*
2756: * ListenAddress must be after Port. add_one_listen_addr pushes
2757: * addresses onto a stack, so to maintain ordering we need to
2758: * print these in reverse order.
2759: */
1.315 djm 2760: for (ai = la->addrs; ai; ai = ai->ai_next) {
2761: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2762: sizeof(addr), port, sizeof(port),
2763: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2764: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2765: continue;
2766: }
2767: laddr2 = laddr1;
2768: if (ai->ai_family == AF_INET6) {
2769: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2770: addr, port,
2771: la->rdomain == NULL ? "" : " rdomain ",
2772: la->rdomain == NULL ? "" : la->rdomain,
2773: laddr2);
1.182 dtucker 2774: } else {
1.315 djm 2775: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2776: addr, port,
2777: la->rdomain == NULL ? "" : " rdomain ",
2778: la->rdomain == NULL ? "" : la->rdomain,
2779: laddr2);
1.182 dtucker 2780: }
1.315 djm 2781: free(laddr2);
2782: }
2783: return laddr1;
2784: }
2785:
2786: void
2787: dump_config(ServerOptions *o)
2788: {
2789: char *s;
2790: u_int i;
2791:
2792: /* these are usually at the top of the config */
2793: for (i = 0; i < o->num_ports; i++)
2794: printf("port %d\n", o->ports[i]);
2795: dump_cfg_fmtint(sAddressFamily, o->address_family);
2796:
2797: for (i = 0; i < o->num_listen_addrs; i++) {
2798: s = format_listen_addrs(&o->listen_addrs[i]);
2799: printf("%s", s);
2800: free(s);
1.182 dtucker 2801: }
2802:
2803: /* integer arguments */
2804: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2805: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2806: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2807: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2808: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2809: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2810: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2811:
2812: /* formatted integer arguments */
2813: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2814: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2815: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2816: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2817: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2818: o->hostbased_uses_name_from_packet_only);
2819: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2820: #ifdef KRB5
1.182 dtucker 2821: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2822: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2823: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2824: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2825: #endif
2826: #ifdef GSSAPI
1.182 dtucker 2827: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2828: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2829: #endif
1.182 dtucker 2830: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2831: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2832: o->kbd_interactive_authentication);
2833: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2834: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2835: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2836: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2837: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2838: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2839: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2840: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2841: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2842: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2843: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2844: dump_cfg_fmtint(sUseDNS, o->use_dns);
2845: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2846: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2847: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2848: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2849: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2850: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2851: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2852:
2853: /* string arguments */
2854: dump_cfg_string(sPidFile, o->pid_file);
1.378 dtucker 2855: dump_cfg_string(sModuliFile, o->moduli_file);
1.182 dtucker 2856: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.358 dtucker 2857: dump_cfg_string(sCiphers, o->ciphers);
2858: dump_cfg_string(sMacs, o->macs);
1.182 dtucker 2859: dump_cfg_string(sBanner, o->banner);
2860: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2861: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2862: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2863: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.355 djm 2864: dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
1.208 djm 2865: dump_cfg_string(sAuthorizedPrincipalsFile,
2866: o->authorized_principals_file);
1.261 dtucker 2867: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2868: ? "none" : o->version_addendum);
1.231 djm 2869: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2870: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2871: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2872: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2873: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.358 dtucker 2874: dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
2875: dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
1.375 dtucker 2876: dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
1.358 dtucker 2877: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
1.374 dtucker 2878: dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
1.316 djm 2879: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2880:
2881: /* string arguments requiring a lookup */
2882: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2883: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2884:
2885: /* string array arguments */
1.219 djm 2886: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2887: o->authorized_keys_files);
1.182 dtucker 2888: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
1.379 djm 2889: o->host_key_files);
1.261 dtucker 2890: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.379 djm 2891: o->host_cert_files);
1.182 dtucker 2892: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2893: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2894: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2895: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2896: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.332 djm 2897: dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
1.232 djm 2898: dump_cfg_strarray_oneline(sAuthenticationMethods,
2899: o->num_auth_methods, o->auth_methods);
1.370 djm 2900: dump_cfg_strarray_oneline(sLogVerbose,
2901: o->num_log_verbose, o->log_verbose);
1.182 dtucker 2902:
2903: /* other arguments */
2904: for (i = 0; i < o->num_subsystems; i++)
2905: printf("subsystem %s %s\n", o->subsystem_name[i],
2906: o->subsystem_args[i]);
2907:
2908: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2909: o->max_startups_rate, o->max_startups);
1.372 dtucker 2910: printf("persourcemaxstartups ");
2911: if (o->per_source_max_startups == INT_MAX)
2912: printf("none\n");
2913: else
2914: printf("%d\n", o->per_source_max_startups);
1.373 dtucker 2915: printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
1.372 dtucker 2916: o->per_source_masklen_ipv6);
1.182 dtucker 2917:
1.318 djm 2918: s = NULL;
2919: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2920: if (tunmode_desc[i].val == o->permit_tun) {
2921: s = tunmode_desc[i].text;
2922: break;
2923: }
1.318 djm 2924: }
1.182 dtucker 2925: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2926:
1.214 stevesk 2927: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2928: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2929:
1.284 dtucker 2930: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2931: o->rekey_interval);
1.182 dtucker 2932:
1.310 djm 2933: printf("permitopen");
2934: if (o->num_permitted_opens == 0)
2935: printf(" any");
2936: else {
2937: for (i = 0; i < o->num_permitted_opens; i++)
2938: printf(" %s", o->permitted_opens[i]);
1.329 djm 2939: }
2940: printf("\n");
1.330 djm 2941: printf("permitlisten");
2942: if (o->num_permitted_listens == 0)
1.329 djm 2943: printf(" any");
2944: else {
1.330 djm 2945: for (i = 0; i < o->num_permitted_listens; i++)
2946: printf(" %s", o->permitted_listens[i]);
1.310 djm 2947: }
2948: printf("\n");
1.334 djm 2949:
1.367 djm 2950: if (o->permit_user_env_allowlist == NULL) {
1.334 djm 2951: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2952: } else {
2953: printf("permituserenvironment %s\n",
1.367 djm 2954: o->permit_user_env_allowlist);
1.334 djm 2955: }
2956:
1.354 djm 2957: printf("pubkeyauthoptions");
2958: if (o->pubkey_auth_options == 0)
2959: printf(" none");
2960: if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
2961: printf(" touch-required");
1.368 djm 2962: if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
2963: printf(" verify-required");
1.354 djm 2964: printf("\n");
1.1 deraadt 2965: }
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