Annotation of src/usr.bin/ssh/servconf.c, Revision 1.377
1.226 dtucker 1:
1.377 ! dtucker 2: /* $OpenBSD: servconf.c,v 1.376 2021/02/15 20:36:35 markus Exp $ */
1.1 deraadt 3: /*
1.26 deraadt 4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.34 markus 6: *
1.51 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 12: */
1.1 deraadt 13:
1.152 stevesk 14: #include <sys/types.h>
15: #include <sys/socket.h>
1.179 djm 16: #include <sys/queue.h>
1.315 djm 17: #include <sys/sysctl.h>
1.366 markus 18: #include <sys/stat.h>
1.154 stevesk 19:
1.213 djm 20: #include <netinet/in.h>
21: #include <netinet/ip.h>
1.315 djm 22: #include <net/route.h>
1.213 djm 23:
1.235 dtucker 24: #include <ctype.h>
1.360 djm 25: #include <glob.h>
1.154 stevesk 26: #include <netdb.h>
1.165 dtucker 27: #include <pwd.h>
1.162 stevesk 28: #include <stdio.h>
1.161 stevesk 29: #include <stdlib.h>
1.160 stevesk 30: #include <string.h>
1.164 deraadt 31: #include <signal.h>
1.155 stevesk 32: #include <unistd.h>
1.259 deraadt 33: #include <limits.h>
1.164 deraadt 34: #include <stdarg.h>
1.182 dtucker 35: #include <errno.h>
1.236 dtucker 36: #include <util.h>
1.1 deraadt 37:
1.164 deraadt 38: #include "xmalloc.h"
1.1 deraadt 39: #include "ssh.h"
1.62 markus 40: #include "log.h"
1.338 markus 41: #include "sshbuf.h"
1.251 millert 42: #include "misc.h"
1.1 deraadt 43: #include "servconf.h"
1.33 markus 44: #include "compat.h"
1.60 markus 45: #include "pathnames.h"
1.62 markus 46: #include "cipher.h"
1.339 markus 47: #include "sshkey.h"
1.66 markus 48: #include "kex.h"
49: #include "mac.h"
1.153 dtucker 50: #include "match.h"
1.156 dtucker 51: #include "channels.h"
1.165 dtucker 52: #include "groupaccess.h"
1.226 dtucker 53: #include "canohost.h"
54: #include "packet.h"
1.338 markus 55: #include "ssherr.h"
1.232 djm 56: #include "hostfile.h"
57: #include "auth.h"
1.252 djm 58: #include "myproposal.h"
1.256 djm 59: #include "digest.h"
1.345 djm 60:
1.315 djm 61: static void add_listen_addr(ServerOptions *, const char *,
62: const char *, int);
63: static void add_one_listen_addr(ServerOptions *, const char *,
64: const char *, int);
1.364 djm 65: static void parse_server_config_depth(ServerOptions *options,
66: const char *filename, struct sshbuf *conf, struct include_list *includes,
1.360 djm 67: struct connection_info *connectinfo, int flags, int *activep, int depth);
1.29 markus 68:
1.102 provos 69: /* Use of privilege separation or not */
70: extern int use_privsep;
1.338 markus 71: extern struct sshbuf *cfg;
1.62 markus 72:
1.1 deraadt 73: /* Initializes the server options to their default values. */
74:
1.34 markus 75: void
1.25 markus 76: initialize_server_options(ServerOptions *options)
1.1 deraadt 77: {
1.25 markus 78: memset(options, 0, sizeof(*options));
1.29 markus 79: options->num_ports = 0;
80: options->ports_from_cmdline = 0;
1.266 dtucker 81: options->queued_listen_addrs = NULL;
82: options->num_queued_listens = 0;
1.29 markus 83: options->listen_addrs = NULL;
1.315 djm 84: options->num_listen_addrs = 0;
1.138 djm 85: options->address_family = -1;
1.316 djm 86: options->routing_domain = NULL;
1.54 markus 87: options->num_host_key_files = 0;
1.203 djm 88: options->num_host_cert_files = 0;
1.240 markus 89: options->host_key_agent = NULL;
1.36 markus 90: options->pid_file = NULL;
1.25 markus 91: options->login_grace_time = -1;
1.279 chris 92: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 93: options->ignore_rhosts = -1;
94: options->ignore_user_known_hosts = -1;
95: options->print_motd = -1;
1.72 stevesk 96: options->print_lastlog = -1;
1.25 markus 97: options->x11_forwarding = -1;
98: options->x11_display_offset = -1;
1.99 stevesk 99: options->x11_use_localhost = -1;
1.244 djm 100: options->permit_tty = -1;
1.250 djm 101: options->permit_user_rc = -1;
1.42 markus 102: options->xauth_location = NULL;
1.25 markus 103: options->strict_modes = -1;
1.129 markus 104: options->tcp_keep_alive = -1;
1.101 markus 105: options->log_facility = SYSLOG_FACILITY_NOT_SET;
106: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.370 djm 107: options->num_log_verbose = 0;
108: options->log_verbose = NULL;
1.75 markus 109: options->hostbased_authentication = -1;
110: options->hostbased_uses_name_from_packet_only = -1;
1.375 dtucker 111: options->hostbased_accepted_algos = NULL;
1.276 markus 112: options->hostkeyalgorithms = NULL;
1.54 markus 113: options->pubkey_authentication = -1;
1.354 djm 114: options->pubkey_auth_options = -1;
1.374 dtucker 115: options->pubkey_accepted_algos = NULL;
1.25 markus 116: options->kerberos_authentication = -1;
117: options->kerberos_or_local_passwd = -1;
118: options->kerberos_ticket_cleanup = -1;
1.130 jakob 119: options->kerberos_get_afs_token = -1;
1.125 markus 120: options->gss_authentication=-1;
121: options->gss_cleanup_creds = -1;
1.271 djm 122: options->gss_strict_acceptor = -1;
1.25 markus 123: options->password_authentication = -1;
1.52 markus 124: options->kbd_interactive_authentication = -1;
1.80 markus 125: options->challenge_response_authentication = -1;
1.25 markus 126: options->permit_empty_passwd = -1;
1.113 markus 127: options->permit_user_env = -1;
1.367 djm 128: options->permit_user_env_allowlist = NULL;
1.111 markus 129: options->compression = -1;
1.235 dtucker 130: options->rekey_limit = -1;
131: options->rekey_interval = -1;
1.53 markus 132: options->allow_tcp_forwarding = -1;
1.251 millert 133: options->allow_streamlocal_forwarding = -1;
1.178 pyr 134: options->allow_agent_forwarding = -1;
1.25 markus 135: options->num_allow_users = 0;
136: options->num_deny_users = 0;
137: options->num_allow_groups = 0;
138: options->num_deny_groups = 0;
1.33 markus 139: options->ciphers = NULL;
1.66 markus 140: options->macs = NULL;
1.211 djm 141: options->kex_algorithms = NULL;
1.341 djm 142: options->ca_sign_algorithms = NULL;
1.251 millert 143: options->fwd_opts.gateway_ports = -1;
144: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
145: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 146: options->num_subsystems = 0;
1.50 markus 147: options->max_startups_begin = -1;
148: options->max_startups_rate = -1;
1.46 markus 149: options->max_startups = -1;
1.372 dtucker 150: options->per_source_max_startups = -1;
151: options->per_source_masklen_ipv4 = -1;
152: options->per_source_masklen_ipv6 = -1;
1.133 dtucker 153: options->max_authtries = -1;
1.180 djm 154: options->max_sessions = -1;
1.57 markus 155: options->banner = NULL;
1.122 markus 156: options->use_dns = -1;
1.77 beck 157: options->client_alive_interval = -1;
158: options->client_alive_count_max = -1;
1.219 djm 159: options->num_authkeys_files = 0;
1.131 djm 160: options->num_accept_env = 0;
1.332 djm 161: options->num_setenv = 0;
1.145 reyk 162: options->permit_tun = -1;
1.310 djm 163: options->permitted_opens = NULL;
1.330 djm 164: options->permitted_listens = NULL;
1.158 dtucker 165: options->adm_forced_command = NULL;
1.176 djm 166: options->chroot_directory = NULL;
1.231 djm 167: options->authorized_keys_command = NULL;
168: options->authorized_keys_command_user = NULL;
1.204 djm 169: options->revoked_keys_file = NULL;
1.355 djm 170: options->sk_provider = NULL;
1.204 djm 171: options->trusted_user_ca_keys = NULL;
1.208 djm 172: options->authorized_principals_file = NULL;
1.270 djm 173: options->authorized_principals_command = NULL;
174: options->authorized_principals_command_user = NULL;
1.213 djm 175: options->ip_qos_interactive = -1;
176: options->ip_qos_bulk = -1;
1.225 djm 177: options->version_addendum = NULL;
1.256 djm 178: options->fingerprint_hash = -1;
1.301 djm 179: options->disable_forwarding = -1;
1.309 djm 180: options->expose_userauth_info = -1;
1.1 deraadt 181: }
182:
1.257 djm 183: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
184: static int
185: option_clear_or_none(const char *o)
186: {
187: return o == NULL || strcasecmp(o, "none") == 0;
188: }
189:
1.282 djm 190: static void
191: assemble_algorithms(ServerOptions *o)
192: {
1.341 djm 193: char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
1.358 dtucker 194: char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
1.340 djm 195: int r;
1.335 djm 196:
197: all_cipher = cipher_alg_list(',', 0);
198: all_mac = mac_alg_list(',');
199: all_kex = kex_alg_list(',');
200: all_key = sshkey_alg_list(0, 0, 1, ',');
1.341 djm 201: all_sig = sshkey_alg_list(0, 1, 1, ',');
1.358 dtucker 202: /* remove unsupported algos from default lists */
1.367 djm 203: def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
204: def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
205: def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
206: def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
207: def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
1.340 djm 208: #define ASSEMBLE(what, defaults, all) \
209: do { \
210: if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
1.371 djm 211: fatal_fr(r, "%s", #what); \
1.340 djm 212: } while (0)
1.358 dtucker 213: ASSEMBLE(ciphers, def_cipher, all_cipher);
214: ASSEMBLE(macs, def_mac, all_mac);
215: ASSEMBLE(kex_algorithms, def_kex, all_kex);
216: ASSEMBLE(hostkeyalgorithms, def_key, all_key);
1.375 dtucker 217: ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
1.374 dtucker 218: ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
1.358 dtucker 219: ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
1.340 djm 220: #undef ASSEMBLE
1.335 djm 221: free(all_cipher);
222: free(all_mac);
223: free(all_kex);
224: free(all_key);
1.341 djm 225: free(all_sig);
1.358 dtucker 226: free(def_cipher);
227: free(def_mac);
228: free(def_kex);
229: free(def_key);
230: free(def_sig);
1.282 djm 231: }
232:
1.314 djm 233: void
234: servconf_add_hostkey(const char *file, const int line,
1.344 djm 235: ServerOptions *options, const char *path, int userprovided)
1.314 djm 236: {
237: char *apath = derelativise_path(path);
238:
1.376 markus 239: opt_array_append2(file, line, "HostKey",
1.344 djm 240: &options->host_key_files, &options->host_key_file_userprovided,
241: &options->num_host_key_files, apath, userprovided);
1.314 djm 242: free(apath);
243: }
244:
245: void
246: servconf_add_hostcert(const char *file, const int line,
247: ServerOptions *options, const char *path)
248: {
249: char *apath = derelativise_path(path);
250:
1.376 markus 251: opt_array_append(file, line, "HostCertificate",
1.314 djm 252: &options->host_cert_files, &options->num_host_cert_files, apath);
253: free(apath);
254: }
255:
1.34 markus 256: void
1.25 markus 257: fill_default_server_options(ServerOptions *options)
1.1 deraadt 258: {
1.314 djm 259: u_int i;
1.257 djm 260:
1.54 markus 261: if (options->num_host_key_files == 0) {
1.293 naddy 262: /* fill default hostkeys */
1.314 djm 263: servconf_add_hostkey("[default]", 0, options,
1.344 djm 264: _PATH_HOST_RSA_KEY_FILE, 0);
1.314 djm 265: servconf_add_hostkey("[default]", 0, options,
1.344 djm 266: _PATH_HOST_ECDSA_KEY_FILE, 0);
1.314 djm 267: servconf_add_hostkey("[default]", 0, options,
1.344 djm 268: _PATH_HOST_ED25519_KEY_FILE, 0);
1.326 markus 269: #ifdef WITH_XMSS
1.325 markus 270: servconf_add_hostkey("[default]", 0, options,
1.344 djm 271: _PATH_HOST_XMSS_KEY_FILE, 0);
1.326 markus 272: #endif /* WITH_XMSS */
1.54 markus 273: }
1.203 djm 274: /* No certificates by default */
1.29 markus 275: if (options->num_ports == 0)
276: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 277: if (options->address_family == -1)
278: options->address_family = AF_UNSPEC;
1.29 markus 279: if (options->listen_addrs == NULL)
1.315 djm 280: add_listen_addr(options, NULL, NULL, 0);
1.36 markus 281: if (options->pid_file == NULL)
1.257 djm 282: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 283: if (options->login_grace_time == -1)
1.115 stevesk 284: options->login_grace_time = 120;
1.67 markus 285: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 286: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 287: if (options->ignore_rhosts == -1)
1.30 markus 288: options->ignore_rhosts = 1;
1.25 markus 289: if (options->ignore_user_known_hosts == -1)
290: options->ignore_user_known_hosts = 0;
291: if (options->print_motd == -1)
292: options->print_motd = 1;
1.72 stevesk 293: if (options->print_lastlog == -1)
294: options->print_lastlog = 1;
1.25 markus 295: if (options->x11_forwarding == -1)
1.30 markus 296: options->x11_forwarding = 0;
1.25 markus 297: if (options->x11_display_offset == -1)
1.30 markus 298: options->x11_display_offset = 10;
1.99 stevesk 299: if (options->x11_use_localhost == -1)
300: options->x11_use_localhost = 1;
1.42 markus 301: if (options->xauth_location == NULL)
1.257 djm 302: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 303: if (options->permit_tty == -1)
304: options->permit_tty = 1;
1.250 djm 305: if (options->permit_user_rc == -1)
306: options->permit_user_rc = 1;
1.25 markus 307: if (options->strict_modes == -1)
308: options->strict_modes = 1;
1.129 markus 309: if (options->tcp_keep_alive == -1)
310: options->tcp_keep_alive = 1;
1.101 markus 311: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 312: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 313: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 314: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 315: if (options->hostbased_authentication == -1)
316: options->hostbased_authentication = 0;
317: if (options->hostbased_uses_name_from_packet_only == -1)
318: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 319: if (options->pubkey_authentication == -1)
320: options->pubkey_authentication = 1;
1.354 djm 321: if (options->pubkey_auth_options == -1)
322: options->pubkey_auth_options = 0;
1.25 markus 323: if (options->kerberos_authentication == -1)
1.107 markus 324: options->kerberos_authentication = 0;
1.25 markus 325: if (options->kerberos_or_local_passwd == -1)
326: options->kerberos_or_local_passwd = 1;
327: if (options->kerberos_ticket_cleanup == -1)
328: options->kerberos_ticket_cleanup = 1;
1.130 jakob 329: if (options->kerberos_get_afs_token == -1)
330: options->kerberos_get_afs_token = 0;
1.125 markus 331: if (options->gss_authentication == -1)
332: options->gss_authentication = 0;
333: if (options->gss_cleanup_creds == -1)
334: options->gss_cleanup_creds = 1;
1.271 djm 335: if (options->gss_strict_acceptor == -1)
1.302 djm 336: options->gss_strict_acceptor = 1;
1.25 markus 337: if (options->password_authentication == -1)
338: options->password_authentication = 1;
1.52 markus 339: if (options->kbd_interactive_authentication == -1)
340: options->kbd_interactive_authentication = 0;
1.80 markus 341: if (options->challenge_response_authentication == -1)
342: options->challenge_response_authentication = 1;
1.25 markus 343: if (options->permit_empty_passwd == -1)
1.30 markus 344: options->permit_empty_passwd = 0;
1.334 djm 345: if (options->permit_user_env == -1) {
1.113 markus 346: options->permit_user_env = 0;
1.367 djm 347: options->permit_user_env_allowlist = NULL;
1.334 djm 348: }
1.111 markus 349: if (options->compression == -1)
1.359 dtucker 350: #ifdef WITH_ZLIB
1.337 sf 351: options->compression = COMP_DELAYED;
1.359 dtucker 352: #else
353: options->compression = COMP_NONE;
354: #endif
355:
1.235 dtucker 356: if (options->rekey_limit == -1)
357: options->rekey_limit = 0;
358: if (options->rekey_interval == -1)
359: options->rekey_interval = 0;
1.53 markus 360: if (options->allow_tcp_forwarding == -1)
1.233 djm 361: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 362: if (options->allow_streamlocal_forwarding == -1)
363: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 364: if (options->allow_agent_forwarding == -1)
365: options->allow_agent_forwarding = 1;
1.251 millert 366: if (options->fwd_opts.gateway_ports == -1)
367: options->fwd_opts.gateway_ports = 0;
1.46 markus 368: if (options->max_startups == -1)
1.234 dtucker 369: options->max_startups = 100;
1.50 markus 370: if (options->max_startups_rate == -1)
1.234 dtucker 371: options->max_startups_rate = 30; /* 30% */
1.50 markus 372: if (options->max_startups_begin == -1)
1.234 dtucker 373: options->max_startups_begin = 10;
1.372 dtucker 374: if (options->per_source_max_startups == -1)
375: options->per_source_max_startups = INT_MAX;
376: if (options->per_source_masklen_ipv4 == -1)
377: options->per_source_masklen_ipv4 = 32;
378: if (options->per_source_masklen_ipv6 == -1)
379: options->per_source_masklen_ipv6 = 128;
1.133 dtucker 380: if (options->max_authtries == -1)
381: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 382: if (options->max_sessions == -1)
383: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 384: if (options->use_dns == -1)
1.260 deraadt 385: options->use_dns = 0;
1.77 beck 386: if (options->client_alive_interval == -1)
1.95 deraadt 387: options->client_alive_interval = 0;
1.77 beck 388: if (options->client_alive_count_max == -1)
389: options->client_alive_count_max = 3;
1.219 djm 390: if (options->num_authkeys_files == 0) {
1.376 markus 391: opt_array_append("[default]", 0, "AuthorizedKeysFiles",
1.314 djm 392: &options->authorized_keys_files,
393: &options->num_authkeys_files,
394: _PATH_SSH_USER_PERMITTED_KEYS);
1.376 markus 395: opt_array_append("[default]", 0, "AuthorizedKeysFiles",
1.314 djm 396: &options->authorized_keys_files,
397: &options->num_authkeys_files,
398: _PATH_SSH_USER_PERMITTED_KEYS2);
1.219 djm 399: }
1.145 reyk 400: if (options->permit_tun == -1)
1.146 reyk 401: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 402: if (options->ip_qos_interactive == -1)
1.327 job 403: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.213 djm 404: if (options->ip_qos_bulk == -1)
1.327 job 405: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.225 djm 406: if (options->version_addendum == NULL)
407: options->version_addendum = xstrdup("");
1.251 millert 408: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
409: options->fwd_opts.streamlocal_bind_mask = 0177;
410: if (options->fwd_opts.streamlocal_bind_unlink == -1)
411: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 412: if (options->fingerprint_hash == -1)
413: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.301 djm 414: if (options->disable_forwarding == -1)
415: options->disable_forwarding = 0;
1.309 djm 416: if (options->expose_userauth_info == -1)
417: options->expose_userauth_info = 0;
1.355 djm 418: if (options->sk_provider == NULL)
419: options->sk_provider = xstrdup("internal");
1.277 djm 420:
1.282 djm 421: assemble_algorithms(options);
1.277 djm 422:
1.285 djm 423: /* Turn privilege separation and sandboxing on by default */
1.102 provos 424: if (use_privsep == -1)
1.285 djm 425: use_privsep = PRIVSEP_ON;
1.257 djm 426:
427: #define CLEAR_ON_NONE(v) \
428: do { \
429: if (option_clear_or_none(v)) { \
430: free(v); \
431: v = NULL; \
432: } \
433: } while(0)
434: CLEAR_ON_NONE(options->pid_file);
435: CLEAR_ON_NONE(options->xauth_location);
436: CLEAR_ON_NONE(options->banner);
437: CLEAR_ON_NONE(options->trusted_user_ca_keys);
438: CLEAR_ON_NONE(options->revoked_keys_file);
1.355 djm 439: CLEAR_ON_NONE(options->sk_provider);
1.267 djm 440: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 441: CLEAR_ON_NONE(options->adm_forced_command);
442: CLEAR_ON_NONE(options->chroot_directory);
1.316 djm 443: CLEAR_ON_NONE(options->routing_domain);
1.357 djm 444: CLEAR_ON_NONE(options->host_key_agent);
1.257 djm 445: for (i = 0; i < options->num_host_key_files; i++)
446: CLEAR_ON_NONE(options->host_key_files[i]);
447: for (i = 0; i < options->num_host_cert_files; i++)
448: CLEAR_ON_NONE(options->host_cert_files[i]);
449: #undef CLEAR_ON_NONE
1.291 djm 450:
451: /* Similar handling for AuthenticationMethods=any */
452: if (options->num_auth_methods == 1 &&
453: strcmp(options->auth_methods[0], "any") == 0) {
454: free(options->auth_methods[0]);
455: options->auth_methods[0] = NULL;
456: options->num_auth_methods = 0;
457: }
1.1 deraadt 458: }
459:
460: /* Keyword tokens. */
1.25 markus 461: typedef enum {
462: sBadOption, /* == unknown option */
1.293 naddy 463: sPort, sHostKeyFile, sLoginGraceTime,
1.370 djm 464: sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
1.25 markus 465: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.323 dtucker 466: sKerberosGetAFSToken, sChallengeResponseAuthentication,
1.138 djm 467: sPasswordAuthentication, sKbdInteractiveAuthentication,
468: sListenAddress, sAddressFamily,
1.72 stevesk 469: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 470: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 471: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 472: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 473: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 474: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.374 dtucker 475: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
1.258 djm 476: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 477: sBanner, sUseDNS, sHostbasedAuthentication,
1.375 dtucker 478: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
1.372 dtucker 479: sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
1.258 djm 480: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 481: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
1.332 djm 482: sAcceptEnv, sSetEnv, sPermitTunnel,
1.330 djm 483: sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
1.200 dtucker 484: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.360 djm 485: sHostCertificate, sInclude,
1.208 djm 486: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 487: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.341 djm 488: sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 489: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 490: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 491: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.301 djm 492: sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
1.355 djm 493: sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
1.295 djm 494: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 495: } ServerOpCodes;
496:
1.360 djm 497: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of config */
498: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
499: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
500: #define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
1.365 djm 501: #define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
1.153 dtucker 502:
1.1 deraadt 503: /* Textual representation of the tokens. */
1.25 markus 504: static struct {
505: const char *name;
506: ServerOpCodes opcode;
1.153 dtucker 507: u_int flags;
1.25 markus 508: } keywords[] = {
1.153 dtucker 509: { "port", sPort, SSHCFG_GLOBAL },
510: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
511: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 512: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 513: { "pidfile", sPidFile, 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 },
1.170 dtucker 558: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 559: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
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') {
1.243 dtucker 997: attributes++;
998: if (strcasecmp(attrib, "all") == 0) {
999: if (attributes != 1 ||
1000: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1001: error("'all' cannot be combined with other "
1002: "Match attributes");
1003: return -1;
1004: }
1005: *condition = cp;
1006: return 1;
1007: }
1.153 dtucker 1008: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
1009: error("Missing Match criteria for %s", attrib);
1010: return -1;
1011: }
1012: if (strcasecmp(attrib, "user") == 0) {
1.351 dtucker 1013: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.153 dtucker 1014: result = 0;
1015: continue;
1016: }
1.319 dtucker 1017: if (ci->user == NULL)
1018: match_test_missing_fatal("User", "user");
1.349 dtucker 1019: if (match_usergroup_pattern_list(ci->user, arg) != 1)
1.153 dtucker 1020: result = 0;
1021: else
1022: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 1023: "line %d", ci->user, arg, line);
1.165 dtucker 1024: } else if (strcasecmp(attrib, "group") == 0) {
1.351 dtucker 1025: if (ci == NULL || (ci->test && ci->user == NULL)) {
1.226 dtucker 1026: result = 0;
1027: continue;
1028: }
1.319 dtucker 1029: if (ci->user == NULL)
1030: match_test_missing_fatal("Group", "user");
1.226 dtucker 1031: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 1032: case -1:
1033: return -1;
1034: case 0:
1035: result = 0;
1036: }
1.153 dtucker 1037: } else if (strcasecmp(attrib, "host") == 0) {
1.351 dtucker 1038: if (ci == NULL || (ci->test && ci->host == NULL)) {
1.153 dtucker 1039: result = 0;
1040: continue;
1041: }
1.319 dtucker 1042: if (ci->host == NULL)
1043: match_test_missing_fatal("Host", "host");
1.269 djm 1044: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 1045: result = 0;
1046: else
1047: debug("connection from %.100s matched 'Host "
1.226 dtucker 1048: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 1049: } else if (strcasecmp(attrib, "address") == 0) {
1.351 dtucker 1050: if (ci == NULL || (ci->test && ci->address == NULL)) {
1.369 dtucker 1051: if (addr_match_list(NULL, arg) != 0)
1052: fatal("Invalid Match address argument "
1053: "'%s' at line %d", arg, line);
1.226 dtucker 1054: result = 0;
1055: continue;
1056: }
1.319 dtucker 1057: if (ci->address == NULL)
1058: match_test_missing_fatal("Address", "addr");
1.226 dtucker 1059: switch (addr_match_list(ci->address, arg)) {
1.181 djm 1060: case 1:
1061: debug("connection from %.100s matched 'Address "
1.226 dtucker 1062: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 1063: break;
1064: case 0:
1.183 djm 1065: case -1:
1.153 dtucker 1066: result = 0;
1.181 djm 1067: break;
1.183 djm 1068: case -2:
1.181 djm 1069: return -1;
1.153 dtucker 1070: }
1.226 dtucker 1071: } else if (strcasecmp(attrib, "localaddress") == 0){
1.351 dtucker 1072: if (ci == NULL || (ci->test && ci->laddress == NULL)) {
1.369 dtucker 1073: if (addr_match_list(NULL, arg) != 0)
1074: fatal("Invalid Match localaddress "
1075: "argument '%s' at line %d", arg,
1076: line);
1.226 dtucker 1077: result = 0;
1078: continue;
1079: }
1.319 dtucker 1080: if (ci->laddress == NULL)
1081: match_test_missing_fatal("LocalAddress",
1082: "laddr");
1.226 dtucker 1083: switch (addr_match_list(ci->laddress, arg)) {
1084: case 1:
1085: debug("connection from %.100s matched "
1086: "'LocalAddress %.100s' at line %d",
1087: ci->laddress, arg, line);
1088: break;
1089: case 0:
1090: case -1:
1091: result = 0;
1092: break;
1093: case -2:
1094: return -1;
1095: }
1096: } else if (strcasecmp(attrib, "localport") == 0) {
1097: if ((port = a2port(arg)) == -1) {
1098: error("Invalid LocalPort '%s' on Match line",
1099: arg);
1100: return -1;
1101: }
1.351 dtucker 1102: if (ci == NULL || (ci->test && ci->lport == -1)) {
1.226 dtucker 1103: result = 0;
1104: continue;
1105: }
1.319 dtucker 1106: if (ci->lport == 0)
1107: match_test_missing_fatal("LocalPort", "lport");
1.226 dtucker 1108: /* TODO support port lists */
1109: if (port == ci->lport)
1110: debug("connection from %.100s matched "
1111: "'LocalPort %d' at line %d",
1112: ci->laddress, port, line);
1113: else
1114: result = 0;
1.317 djm 1115: } else if (strcasecmp(attrib, "rdomain") == 0) {
1.351 dtucker 1116: if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
1.317 djm 1117: result = 0;
1118: continue;
1119: }
1.351 dtucker 1120: if (ci->rdomain == NULL)
1121: match_test_missing_fatal("RDomain", "rdomain");
1.317 djm 1122: if (match_pattern_list(ci->rdomain, arg, 0) != 1)
1123: result = 0;
1124: else
1125: debug("user %.100s matched 'RDomain %.100s' at "
1126: "line %d", ci->rdomain, arg, line);
1.153 dtucker 1127: } else {
1128: error("Unsupported Match attribute %s", attrib);
1129: return -1;
1130: }
1.243 dtucker 1131: }
1132: if (attributes == 0) {
1133: error("One or more attributes required for Match");
1134: return -1;
1.153 dtucker 1135: }
1.226 dtucker 1136: if (ci != NULL)
1.153 dtucker 1137: debug3("match %sfound", result ? "" : "not ");
1138: *condition = cp;
1139: return result;
1140: }
1141:
1.158 dtucker 1142: #define WHITESPACE " \t\r\n"
1143:
1.220 djm 1144: /* Multistate option parsing */
1145: struct multistate {
1146: char *key;
1147: int value;
1148: };
1.320 djm 1149: static const struct multistate multistate_flag[] = {
1150: { "yes", 1 },
1151: { "no", 0 },
1152: { NULL, -1 }
1153: };
1.363 djm 1154: static const struct multistate multistate_ignore_rhosts[] = {
1155: { "yes", IGNORE_RHOSTS_YES },
1156: { "no", IGNORE_RHOSTS_NO },
1157: { "shosts-only", IGNORE_RHOSTS_SHOSTS },
1158: { NULL, -1 }
1159: };
1.220 djm 1160: static const struct multistate multistate_addressfamily[] = {
1161: { "inet", AF_INET },
1162: { "inet6", AF_INET6 },
1163: { "any", AF_UNSPEC },
1164: { NULL, -1 }
1165: };
1166: static const struct multistate multistate_permitrootlogin[] = {
1167: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 1168: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 1169: { "forced-commands-only", PERMIT_FORCED_ONLY },
1170: { "yes", PERMIT_YES },
1171: { "no", PERMIT_NO },
1172: { NULL, -1 }
1173: };
1174: static const struct multistate multistate_compression[] = {
1.359 dtucker 1175: #ifdef WITH_ZLIB
1.337 sf 1176: { "yes", COMP_DELAYED },
1177: { "delayed", COMP_DELAYED },
1.359 dtucker 1178: #endif
1.220 djm 1179: { "no", COMP_NONE },
1180: { NULL, -1 }
1181: };
1182: static const struct multistate multistate_gatewayports[] = {
1183: { "clientspecified", 2 },
1184: { "yes", 1 },
1185: { "no", 0 },
1.222 djm 1186: { NULL, -1 }
1187: };
1.233 djm 1188: static const struct multistate multistate_tcpfwd[] = {
1189: { "yes", FORWARD_ALLOW },
1190: { "all", FORWARD_ALLOW },
1191: { "no", FORWARD_DENY },
1192: { "remote", FORWARD_REMOTE },
1193: { "local", FORWARD_LOCAL },
1194: { NULL, -1 }
1195: };
1.220 djm 1196:
1.360 djm 1197: static int
1198: process_server_config_line_depth(ServerOptions *options, char *line,
1.226 dtucker 1199: const char *filename, int linenum, int *activep,
1.365 djm 1200: struct connection_info *connectinfo, int *inc_flags, int depth,
1.360 djm 1201: struct include_list *includes)
1.1 deraadt 1202: {
1.348 dtucker 1203: char ch, *cp, ***chararrayptr, **charptr, *arg, *arg2, *p;
1.360 djm 1204: int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
1.174 dtucker 1205: SyslogFacility *log_facility_ptr;
1206: LogLevel *log_level_ptr;
1.25 markus 1207: ServerOpCodes opcode;
1.329 djm 1208: u_int i, *uintptr, uvalue, flags = 0;
1.151 djm 1209: size_t len;
1.237 dtucker 1210: long long val64;
1.220 djm 1211: const struct multistate *multistate_ptr;
1.322 dtucker 1212: const char *errstr;
1.360 djm 1213: struct include_item *item;
1214: glob_t gbuf;
1.303 djm 1215:
1216: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1217: if ((len = strlen(line)) == 0)
1218: return 0;
1219: for (len--; len > 0; len--) {
1220: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1221: break;
1222: line[len] = '\0';
1223: }
1.25 markus 1224:
1.94 markus 1225: cp = line;
1.148 dtucker 1226: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 1227: return 0;
1.94 markus 1228: /* Ignore leading whitespace */
1229: if (*arg == '\0')
1230: arg = strdelim(&cp);
1231: if (!arg || !*arg || *arg == '#')
1232: return 0;
1233: intptr = NULL;
1234: charptr = NULL;
1.153 dtucker 1235: opcode = parse_token(arg, filename, linenum, &flags);
1236:
1237: if (activep == NULL) { /* We are processing a command line directive */
1238: cmdline = 1;
1239: activep = &cmdline;
1240: }
1.360 djm 1241: if (*activep && opcode != sMatch && opcode != sInclude)
1.153 dtucker 1242: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
1243: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 1244: if (connectinfo == NULL) {
1.153 dtucker 1245: fatal("%s line %d: Directive '%s' is not allowed "
1246: "within a Match block", filename, linenum, arg);
1247: } else { /* this is a directive we have already processed */
1248: while (arg)
1249: arg = strdelim(&cp);
1250: return 0;
1251: }
1252: }
1253:
1.94 markus 1254: switch (opcode) {
1255: case sBadOption:
1256: return -1;
1257: case sPort:
1258: /* ignore ports from configfile if cmdline specifies ports */
1259: if (options->ports_from_cmdline)
1260: return 0;
1261: if (options->num_ports >= MAX_PORTS)
1262: fatal("%s line %d: too many ports.",
1263: filename, linenum);
1.48 provos 1264: arg = strdelim(&cp);
1.94 markus 1265: if (!arg || *arg == '\0')
1266: fatal("%s line %d: missing port number.",
1267: filename, linenum);
1268: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 1269: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 1270: fatal("%s line %d: Badly formatted port number.",
1271: filename, linenum);
1272: break;
1.29 markus 1273:
1.94 markus 1274: case sLoginGraceTime:
1275: intptr = &options->login_grace_time;
1.180 djm 1276: parse_time:
1.94 markus 1277: arg = strdelim(&cp);
1278: if (!arg || *arg == '\0')
1279: fatal("%s line %d: missing time value.",
1280: filename, linenum);
1281: if ((value = convtime(arg)) == -1)
1282: fatal("%s line %d: invalid time value.",
1283: filename, linenum);
1.268 djm 1284: if (*activep && *intptr == -1)
1.94 markus 1285: *intptr = value;
1286: break;
1287:
1288: case sListenAddress:
1289: arg = strdelim(&cp);
1.139 djm 1290: if (arg == NULL || *arg == '\0')
1291: fatal("%s line %d: missing address",
1.94 markus 1292: filename, linenum);
1.144 dtucker 1293: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
1294: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
1295: && strchr(p+1, ':') != NULL) {
1.315 djm 1296: port = 0;
1297: p = arg;
1298: } else {
1.347 dtucker 1299: arg2 = NULL;
1.348 dtucker 1300: ch = '\0';
1.347 dtucker 1301: p = hpdelim2(&arg, &ch);
1302: if (p == NULL || ch == '/')
1.315 djm 1303: fatal("%s line %d: bad address:port usage",
1304: filename, linenum);
1305: p = cleanhostname(p);
1306: if (arg == NULL)
1307: port = 0;
1308: else if ((port = a2port(arg)) <= 0)
1309: fatal("%s line %d: bad port number",
1310: filename, linenum);
1311: }
1312: /* Optional routing table */
1313: arg2 = NULL;
1314: if ((arg = strdelim(&cp)) != NULL) {
1315: if (strcmp(arg, "rdomain") != 0 ||
1316: (arg2 = strdelim(&cp)) == NULL)
1317: fatal("%s line %d: bad ListenAddress syntax",
1318: filename, linenum);
1319: if (!valid_rdomain(arg2))
1320: fatal("%s line %d: bad routing domain",
1321: filename, linenum);
1.144 dtucker 1322: }
1.139 djm 1323:
1.315 djm 1324: queue_listen_addr(options, p, arg2, port);
1.25 markus 1325:
1.138 djm 1326: break;
1327:
1328: case sAddressFamily:
1.220 djm 1329: intptr = &options->address_family;
1330: multistate_ptr = multistate_addressfamily;
1331: parse_multistate:
1.138 djm 1332: arg = strdelim(&cp);
1.141 markus 1333: if (!arg || *arg == '\0')
1.220 djm 1334: fatal("%s line %d: missing argument.",
1.141 markus 1335: filename, linenum);
1.220 djm 1336: value = -1;
1337: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1338: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1339: value = multistate_ptr[i].value;
1340: break;
1341: }
1342: }
1343: if (value == -1)
1344: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1345: filename, linenum, arg);
1.220 djm 1346: if (*activep && *intptr == -1)
1.138 djm 1347: *intptr = value;
1.94 markus 1348: break;
1349:
1350: case sHostKeyFile:
1351: arg = strdelim(&cp);
1352: if (!arg || *arg == '\0')
1353: fatal("%s line %d: missing file name.",
1354: filename, linenum);
1.344 djm 1355: if (*activep) {
1356: servconf_add_hostkey(filename, linenum,
1357: options, arg, 1);
1358: }
1.94 markus 1359: break;
1.76 stevesk 1360:
1.240 markus 1361: case sHostKeyAgent:
1362: charptr = &options->host_key_agent;
1363: arg = strdelim(&cp);
1364: if (!arg || *arg == '\0')
1365: fatal("%s line %d: missing socket name.",
1366: filename, linenum);
1367: if (*activep && *charptr == NULL)
1368: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1369: xstrdup(arg) : derelativise_path(arg);
1370: break;
1371:
1.203 djm 1372: case sHostCertificate:
1.314 djm 1373: arg = strdelim(&cp);
1374: if (!arg || *arg == '\0')
1375: fatal("%s line %d: missing file name.",
1376: filename, linenum);
1377: if (*activep)
1378: servconf_add_hostcert(filename, linenum, options, arg);
1379: break;
1.203 djm 1380:
1.94 markus 1381: case sPidFile:
1382: charptr = &options->pid_file;
1.314 djm 1383: parse_filename:
1384: arg = strdelim(&cp);
1385: if (!arg || *arg == '\0')
1386: fatal("%s line %d: missing file name.",
1387: filename, linenum);
1388: if (*activep && *charptr == NULL) {
1389: *charptr = derelativise_path(arg);
1390: /* increase optional counter */
1391: if (intptr != NULL)
1392: *intptr = *intptr + 1;
1393: }
1394: break;
1.25 markus 1395:
1.94 markus 1396: case sPermitRootLogin:
1397: intptr = &options->permit_root_login;
1.220 djm 1398: multistate_ptr = multistate_permitrootlogin;
1399: goto parse_multistate;
1.36 markus 1400:
1.94 markus 1401: case sIgnoreRhosts:
1402: intptr = &options->ignore_rhosts;
1.363 djm 1403: multistate_ptr = multistate_ignore_rhosts;
1.320 djm 1404: goto parse_multistate;
1.94 markus 1405:
1406: case sIgnoreUserKnownHosts:
1407: intptr = &options->ignore_user_known_hosts;
1.363 djm 1408: parse_flag:
1409: multistate_ptr = multistate_flag;
1410: goto parse_multistate;
1.94 markus 1411:
1412: case sHostbasedAuthentication:
1413: intptr = &options->hostbased_authentication;
1414: goto parse_flag;
1415:
1416: case sHostbasedUsesNameFromPacketOnly:
1417: intptr = &options->hostbased_uses_name_from_packet_only;
1418: goto parse_flag;
1419:
1.375 dtucker 1420: case sHostbasedAcceptedAlgorithms:
1421: charptr = &options->hostbased_accepted_algos;
1.374 dtucker 1422: parse_pubkey_algos:
1.258 djm 1423: arg = strdelim(&cp);
1424: if (!arg || *arg == '\0')
1425: fatal("%s line %d: Missing argument.",
1426: filename, linenum);
1.304 djm 1427: if (*arg != '-' &&
1.352 naddy 1428: !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
1429: arg + 1 : arg, 1))
1.258 djm 1430: fatal("%s line %d: Bad key types '%s'.",
1431: filename, linenum, arg ? arg : "<NONE>");
1432: if (*activep && *charptr == NULL)
1433: *charptr = xstrdup(arg);
1434: break;
1435:
1.276 markus 1436: case sHostKeyAlgorithms:
1437: charptr = &options->hostkeyalgorithms;
1.374 dtucker 1438: goto parse_pubkey_algos;
1.276 markus 1439:
1.341 djm 1440: case sCASignatureAlgorithms:
1441: charptr = &options->ca_sign_algorithms;
1.374 dtucker 1442: goto parse_pubkey_algos;
1.341 djm 1443:
1.94 markus 1444: case sPubkeyAuthentication:
1445: intptr = &options->pubkey_authentication;
1446: goto parse_flag;
1.119 jakob 1447:
1.374 dtucker 1448: case sPubkeyAcceptedAlgorithms:
1449: charptr = &options->pubkey_accepted_algos;
1450: goto parse_pubkey_algos;
1.258 djm 1451:
1.354 djm 1452: case sPubkeyAuthOptions:
1453: intptr = &options->pubkey_auth_options;
1454: value = 0;
1455: while ((arg = strdelim(&cp)) && *arg != '\0') {
1456: if (strcasecmp(arg, "none") == 0)
1457: continue;
1458: if (strcasecmp(arg, "touch-required") == 0)
1459: value |= PUBKEYAUTH_TOUCH_REQUIRED;
1.368 djm 1460: else if (strcasecmp(arg, "verify-required") == 0)
1461: value |= PUBKEYAUTH_VERIFY_REQUIRED;
1.354 djm 1462: else {
1463: fatal("%s line %d: unsupported "
1464: "PubkeyAuthOptions option %s",
1465: filename, linenum, arg);
1466: }
1467: }
1468: if (*activep && *intptr == -1)
1469: *intptr = value;
1470: break;
1471:
1.94 markus 1472: case sKerberosAuthentication:
1473: intptr = &options->kerberos_authentication;
1474: goto parse_flag;
1475:
1476: case sKerberosOrLocalPasswd:
1477: intptr = &options->kerberos_or_local_passwd;
1478: goto parse_flag;
1479:
1480: case sKerberosTicketCleanup:
1481: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1482: goto parse_flag;
1483:
1484: case sKerberosGetAFSToken:
1485: intptr = &options->kerberos_get_afs_token;
1.125 markus 1486: goto parse_flag;
1487:
1488: case sGssAuthentication:
1489: intptr = &options->gss_authentication;
1490: goto parse_flag;
1491:
1492: case sGssCleanupCreds:
1493: intptr = &options->gss_cleanup_creds;
1.271 djm 1494: goto parse_flag;
1495:
1496: case sGssStrictAcceptor:
1497: intptr = &options->gss_strict_acceptor;
1.94 markus 1498: goto parse_flag;
1499:
1500: case sPasswordAuthentication:
1501: intptr = &options->password_authentication;
1502: goto parse_flag;
1503:
1504: case sKbdInteractiveAuthentication:
1505: intptr = &options->kbd_interactive_authentication;
1506: goto parse_flag;
1507:
1508: case sChallengeResponseAuthentication:
1509: intptr = &options->challenge_response_authentication;
1510: goto parse_flag;
1511:
1512: case sPrintMotd:
1513: intptr = &options->print_motd;
1514: goto parse_flag;
1515:
1516: case sPrintLastLog:
1517: intptr = &options->print_lastlog;
1518: goto parse_flag;
1519:
1520: case sX11Forwarding:
1521: intptr = &options->x11_forwarding;
1522: goto parse_flag;
1523:
1524: case sX11DisplayOffset:
1525: intptr = &options->x11_display_offset;
1.293 naddy 1526: parse_int:
1527: arg = strdelim(&cp);
1.322 dtucker 1528: if ((errstr = atoi_err(arg, &value)) != NULL)
1529: fatal("%s line %d: integer value %s.",
1530: filename, linenum, errstr);
1.293 naddy 1531: if (*activep && *intptr == -1)
1532: *intptr = value;
1533: break;
1.99 stevesk 1534:
1535: case sX11UseLocalhost:
1536: intptr = &options->x11_use_localhost;
1537: goto parse_flag;
1.94 markus 1538:
1539: case sXAuthLocation:
1540: charptr = &options->xauth_location;
1541: goto parse_filename;
1542:
1.244 djm 1543: case sPermitTTY:
1544: intptr = &options->permit_tty;
1545: goto parse_flag;
1546:
1.250 djm 1547: case sPermitUserRC:
1548: intptr = &options->permit_user_rc;
1549: goto parse_flag;
1550:
1.94 markus 1551: case sStrictModes:
1552: intptr = &options->strict_modes;
1553: goto parse_flag;
1554:
1.129 markus 1555: case sTCPKeepAlive:
1556: intptr = &options->tcp_keep_alive;
1.94 markus 1557: goto parse_flag;
1558:
1559: case sEmptyPasswd:
1560: intptr = &options->permit_empty_passwd;
1.113 markus 1561: goto parse_flag;
1562:
1563: case sPermitUserEnvironment:
1564: intptr = &options->permit_user_env;
1.367 djm 1565: charptr = &options->permit_user_env_allowlist;
1.334 djm 1566: arg = strdelim(&cp);
1567: if (!arg || *arg == '\0')
1568: fatal("%s line %d: missing argument.",
1569: filename, linenum);
1570: value = 0;
1571: p = NULL;
1572: if (strcmp(arg, "yes") == 0)
1573: value = 1;
1574: else if (strcmp(arg, "no") == 0)
1575: value = 0;
1576: else {
1577: /* Pattern-list specified */
1578: value = 1;
1579: p = xstrdup(arg);
1580: }
1581: if (*activep && *intptr == -1) {
1582: *intptr = value;
1583: *charptr = p;
1584: p = NULL;
1585: }
1586: free(p);
1587: break;
1.94 markus 1588:
1.111 markus 1589: case sCompression:
1590: intptr = &options->compression;
1.220 djm 1591: multistate_ptr = multistate_compression;
1592: goto parse_multistate;
1.94 markus 1593:
1.235 dtucker 1594: case sRekeyLimit:
1595: arg = strdelim(&cp);
1596: if (!arg || *arg == '\0')
1597: fatal("%.200s line %d: Missing argument.", filename,
1598: linenum);
1599: if (strcmp(arg, "default") == 0) {
1600: val64 = 0;
1601: } else {
1.236 dtucker 1602: if (scan_scaled(arg, &val64) == -1)
1603: fatal("%.200s line %d: Bad number '%s': %s",
1604: filename, linenum, arg, strerror(errno));
1.235 dtucker 1605: if (val64 != 0 && val64 < 16)
1606: fatal("%.200s line %d: RekeyLimit too small",
1607: filename, linenum);
1608: }
1609: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1610: options->rekey_limit = val64;
1.235 dtucker 1611: if (cp != NULL) { /* optional rekey interval present */
1612: if (strcmp(cp, "none") == 0) {
1613: (void)strdelim(&cp); /* discard */
1614: break;
1615: }
1616: intptr = &options->rekey_interval;
1617: goto parse_time;
1618: }
1619: break;
1620:
1.94 markus 1621: case sGatewayPorts:
1.251 millert 1622: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1623: multistate_ptr = multistate_gatewayports;
1624: goto parse_multistate;
1.25 markus 1625:
1.122 markus 1626: case sUseDNS:
1627: intptr = &options->use_dns;
1.94 markus 1628: goto parse_flag;
1.53 markus 1629:
1.94 markus 1630: case sLogFacility:
1.174 dtucker 1631: log_facility_ptr = &options->log_facility;
1.94 markus 1632: arg = strdelim(&cp);
1633: value = log_facility_number(arg);
1.101 markus 1634: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1635: fatal("%.200s line %d: unsupported log facility '%s'",
1636: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1637: if (*log_facility_ptr == -1)
1638: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1639: break;
1.25 markus 1640:
1.94 markus 1641: case sLogLevel:
1.174 dtucker 1642: log_level_ptr = &options->log_level;
1.94 markus 1643: arg = strdelim(&cp);
1644: value = log_level_number(arg);
1.101 markus 1645: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1646: fatal("%.200s line %d: unsupported log level '%s'",
1647: filename, linenum, arg ? arg : "<NONE>");
1.308 djm 1648: if (*activep && *log_level_ptr == -1)
1.174 dtucker 1649: *log_level_ptr = (LogLevel) value;
1.94 markus 1650: break;
1651:
1.370 djm 1652: case sLogVerbose:
1653: while ((arg = strdelim(&cp)) && *arg != '\0') {
1654: if (!*activep)
1655: continue;
1.376 markus 1656: opt_array_append(filename, linenum, "oLogVerbose",
1.370 djm 1657: &options->log_verbose, &options->num_log_verbose,
1658: arg);
1659: }
1660: break;
1661:
1.94 markus 1662: case sAllowTcpForwarding:
1663: intptr = &options->allow_tcp_forwarding;
1.233 djm 1664: multistate_ptr = multistate_tcpfwd;
1665: goto parse_multistate;
1.102 provos 1666:
1.251 millert 1667: case sAllowStreamLocalForwarding:
1668: intptr = &options->allow_streamlocal_forwarding;
1669: multistate_ptr = multistate_tcpfwd;
1670: goto parse_multistate;
1671:
1.178 pyr 1672: case sAllowAgentForwarding:
1673: intptr = &options->allow_agent_forwarding;
1674: goto parse_flag;
1675:
1.301 djm 1676: case sDisableForwarding:
1677: intptr = &options->disable_forwarding;
1678: goto parse_flag;
1679:
1.94 markus 1680: case sAllowUsers:
1681: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1682: if (match_user(NULL, NULL, NULL, arg) == -1)
1683: fatal("%s line %d: invalid AllowUsers pattern: "
1684: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1685: if (!*activep)
1686: continue;
1.376 markus 1687: opt_array_append(filename, linenum, "AllowUsers",
1.314 djm 1688: &options->allow_users, &options->num_allow_users,
1689: arg);
1.94 markus 1690: }
1691: break;
1.25 markus 1692:
1.94 markus 1693: case sDenyUsers:
1694: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.299 djm 1695: if (match_user(NULL, NULL, NULL, arg) == -1)
1696: fatal("%s line %d: invalid DenyUsers pattern: "
1697: "\"%.100s\"", filename, linenum, arg);
1.227 markus 1698: if (!*activep)
1699: continue;
1.376 markus 1700: opt_array_append(filename, linenum, "DenyUsers",
1.314 djm 1701: &options->deny_users, &options->num_deny_users,
1702: arg);
1.94 markus 1703: }
1704: break;
1.25 markus 1705:
1.94 markus 1706: case sAllowGroups:
1707: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1708: if (!*activep)
1709: continue;
1.376 markus 1710: opt_array_append(filename, linenum, "AllowGroups",
1.314 djm 1711: &options->allow_groups, &options->num_allow_groups,
1712: arg);
1.94 markus 1713: }
1714: break;
1.33 markus 1715:
1.94 markus 1716: case sDenyGroups:
1717: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.227 markus 1718: if (!*activep)
1719: continue;
1.376 markus 1720: opt_array_append(filename, linenum, "DenyGroups",
1.314 djm 1721: &options->deny_groups, &options->num_deny_groups,
1722: arg);
1.94 markus 1723: }
1724: break;
1.66 markus 1725:
1.94 markus 1726: case sCiphers:
1727: arg = strdelim(&cp);
1728: if (!arg || *arg == '\0')
1729: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1730: if (*arg != '-' &&
1731: !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1732: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1733: filename, linenum, arg ? arg : "<NONE>");
1734: if (options->ciphers == NULL)
1735: options->ciphers = xstrdup(arg);
1736: break;
1.33 markus 1737:
1.94 markus 1738: case sMacs:
1739: arg = strdelim(&cp);
1740: if (!arg || *arg == '\0')
1741: fatal("%s line %d: Missing argument.", filename, linenum);
1.352 naddy 1742: if (*arg != '-' &&
1743: !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
1.94 markus 1744: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1745: filename, linenum, arg ? arg : "<NONE>");
1746: if (options->macs == NULL)
1747: options->macs = xstrdup(arg);
1.211 djm 1748: break;
1749:
1750: case sKexAlgorithms:
1751: arg = strdelim(&cp);
1752: if (!arg || *arg == '\0')
1753: fatal("%s line %d: Missing argument.",
1754: filename, linenum);
1.304 djm 1755: if (*arg != '-' &&
1.352 naddy 1756: !kex_names_valid(*arg == '+' || *arg == '^' ?
1757: arg + 1 : arg))
1.211 djm 1758: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1759: filename, linenum, arg ? arg : "<NONE>");
1760: if (options->kex_algorithms == NULL)
1761: options->kex_algorithms = xstrdup(arg);
1.94 markus 1762: break;
1.43 jakob 1763:
1.94 markus 1764: case sSubsystem:
1765: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1766: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1767: filename, linenum);
1.94 markus 1768: }
1769: arg = strdelim(&cp);
1770: if (!arg || *arg == '\0')
1771: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1772: filename, linenum);
1.153 dtucker 1773: if (!*activep) {
1774: arg = strdelim(&cp);
1775: break;
1776: }
1.94 markus 1777: for (i = 0; i < options->num_subsystems; i++)
1778: if (strcmp(arg, options->subsystem_name[i]) == 0)
1779: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1780: filename, linenum, arg);
1.94 markus 1781: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1782: arg = strdelim(&cp);
1783: if (!arg || *arg == '\0')
1784: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1785: filename, linenum);
1.94 markus 1786: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1787:
1788: /* Collect arguments (separate to executable) */
1789: p = xstrdup(arg);
1790: len = strlen(p) + 1;
1791: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1792: len += 1 + strlen(arg);
1.264 deraadt 1793: p = xreallocarray(p, 1, len);
1.151 djm 1794: strlcat(p, " ", len);
1795: strlcat(p, arg, len);
1796: }
1797: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1798: options->num_subsystems++;
1799: break;
1.46 markus 1800:
1.94 markus 1801: case sMaxStartups:
1802: arg = strdelim(&cp);
1803: if (!arg || *arg == '\0')
1804: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1805: filename, linenum);
1.94 markus 1806: if ((n = sscanf(arg, "%d:%d:%d",
1807: &options->max_startups_begin,
1808: &options->max_startups_rate,
1809: &options->max_startups)) == 3) {
1810: if (options->max_startups_begin >
1811: options->max_startups ||
1812: options->max_startups_rate > 100 ||
1813: options->max_startups_rate < 1)
1.50 markus 1814: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1815: filename, linenum);
1.94 markus 1816: } else if (n != 1)
1817: fatal("%s line %d: Illegal MaxStartups spec.",
1818: filename, linenum);
1819: else
1820: options->max_startups = options->max_startups_begin;
1821: break;
1.133 dtucker 1822:
1.372 dtucker 1823: case sPerSourceNetBlockSize:
1824: arg = strdelim(&cp);
1825: if (!arg || *arg == '\0')
1826: fatal("%s line %d: Missing PerSourceNetBlockSize spec.",
1827: filename, linenum);
1828: switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
1829: case 2:
1830: if (value2 < 0 || value2 > 128)
1831: n = -1;
1832: /* FALLTHROUGH */
1833: case 1:
1834: if (value < 0 || value > 32)
1835: n = -1;
1836: }
1837: if (n != 1 && n != 2)
1838: fatal("%s line %d: Invalid PerSourceNetBlockSize"
1839: " spec.", filename, linenum);
1840: if (*activep) {
1841: options->per_source_masklen_ipv4 = value;
1842: options->per_source_masklen_ipv6 = value2;
1843: }
1844: break;
1845:
1846: case sPerSourceMaxStartups:
1847: arg = strdelim(&cp);
1848: if (!arg || *arg == '\0')
1849: fatal("%s line %d: Missing PerSourceMaxStartups spec.",
1850: filename, linenum);
1851: if (strcmp(arg, "none") == 0) { /* no limit */
1852: value = INT_MAX;
1853: } else {
1854: if ((errstr = atoi_err(arg, &value)) != NULL)
1855: fatal("%s line %d: integer value %s.",
1856: filename, linenum, errstr);
1857: }
1858: if (*activep)
1859: options->per_source_max_startups = value;
1860: break;
1861:
1.133 dtucker 1862: case sMaxAuthTries:
1863: intptr = &options->max_authtries;
1864: goto parse_int;
1.94 markus 1865:
1.180 djm 1866: case sMaxSessions:
1867: intptr = &options->max_sessions;
1868: goto parse_int;
1869:
1.94 markus 1870: case sBanner:
1871: charptr = &options->banner;
1872: goto parse_filename;
1.176 djm 1873:
1.94 markus 1874: /*
1875: * These options can contain %X options expanded at
1876: * connect time, so that you can specify paths like:
1877: *
1878: * AuthorizedKeysFile /etc/ssh_keys/%u
1879: */
1880: case sAuthorizedKeysFile:
1.219 djm 1881: if (*activep && options->num_authkeys_files == 0) {
1882: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.314 djm 1883: arg = tilde_expand_filename(arg, getuid());
1.376 markus 1884: opt_array_append(filename, linenum,
1.314 djm 1885: "AuthorizedKeysFile",
1886: &options->authorized_keys_files,
1887: &options->num_authkeys_files, arg);
1888: free(arg);
1.219 djm 1889: }
1890: }
1891: return 0;
1892:
1.208 djm 1893: case sAuthorizedPrincipalsFile:
1894: charptr = &options->authorized_principals_file;
1.205 djm 1895: arg = strdelim(&cp);
1896: if (!arg || *arg == '\0')
1897: fatal("%s line %d: missing file name.",
1898: filename, linenum);
1899: if (*activep && *charptr == NULL) {
1.206 markus 1900: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1901: /* increase optional counter */
1902: if (intptr != NULL)
1903: *intptr = *intptr + 1;
1904: }
1905: break;
1.94 markus 1906:
1907: case sClientAliveInterval:
1908: intptr = &options->client_alive_interval;
1909: goto parse_time;
1910:
1911: case sClientAliveCountMax:
1912: intptr = &options->client_alive_count_max;
1913: goto parse_int;
1.131 djm 1914:
1915: case sAcceptEnv:
1916: while ((arg = strdelim(&cp)) && *arg != '\0') {
1917: if (strchr(arg, '=') != NULL)
1918: fatal("%s line %d: Invalid environment name.",
1919: filename, linenum);
1.153 dtucker 1920: if (!*activep)
1.227 markus 1921: continue;
1.376 markus 1922: opt_array_append(filename, linenum, "AcceptEnv",
1.314 djm 1923: &options->accept_env, &options->num_accept_env,
1924: arg);
1.131 djm 1925: }
1926: break;
1.145 reyk 1927:
1.332 djm 1928: case sSetEnv:
1929: uvalue = options->num_setenv;
1930: while ((arg = strdelimw(&cp)) && *arg != '\0') {
1931: if (strchr(arg, '=') == NULL)
1932: fatal("%s line %d: Invalid environment.",
1933: filename, linenum);
1934: if (!*activep || uvalue != 0)
1935: continue;
1.376 markus 1936: opt_array_append(filename, linenum, "SetEnv",
1.332 djm 1937: &options->setenv, &options->num_setenv, arg);
1938: }
1939: break;
1940:
1.145 reyk 1941: case sPermitTunnel:
1942: intptr = &options->permit_tun;
1.146 reyk 1943: arg = strdelim(&cp);
1944: if (!arg || *arg == '\0')
1945: fatal("%s line %d: Missing yes/point-to-point/"
1946: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1947: value = -1;
1948: for (i = 0; tunmode_desc[i].val != -1; i++)
1949: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1950: value = tunmode_desc[i].val;
1951: break;
1952: }
1953: if (value == -1)
1.146 reyk 1954: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1955: "no argument: %s", filename, linenum, arg);
1.268 djm 1956: if (*activep && *intptr == -1)
1.146 reyk 1957: *intptr = value;
1958: break;
1.94 markus 1959:
1.360 djm 1960: case sInclude:
1961: if (cmdline) {
1962: fatal("Include directive not supported as a "
1963: "command-line option");
1964: }
1965: value = 0;
1966: while ((arg2 = strdelim(&cp)) != NULL && *arg2 != '\0') {
1967: value++;
1968: found = 0;
1969: if (*arg2 != '/' && *arg2 != '~') {
1.361 markus 1970: xasprintf(&arg, "%s/%s", SSHDIR, arg2);
1.360 djm 1971: } else
1972: arg = xstrdup(arg2);
1973:
1974: /*
1975: * Don't let included files clobber the containing
1976: * file's Match state.
1977: */
1978: oactive = *activep;
1979:
1980: /* consult cache of include files */
1981: TAILQ_FOREACH(item, includes, entry) {
1982: if (strcmp(item->selector, arg) != 0)
1983: continue;
1984: if (item->filename != NULL) {
1985: parse_server_config_depth(options,
1986: item->filename, item->contents,
1987: includes, connectinfo,
1.365 djm 1988: (*inc_flags & SSHCFG_MATCH_ONLY
1989: ? SSHCFG_MATCH_ONLY : (oactive
1990: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 1991: activep, depth + 1);
1992: }
1993: found = 1;
1994: *activep = oactive;
1995: }
1996: if (found != 0) {
1997: free(arg);
1998: continue;
1999: }
2000:
2001: /* requested glob was not in cache */
2002: debug2("%s line %d: new include %s",
2003: filename, linenum, arg);
2004: if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
2005: if (r != GLOB_NOMATCH) {
2006: fatal("%s line %d: include \"%s\" "
2007: "glob failed", filename,
2008: linenum, arg);
2009: }
2010: /*
2011: * If no entry matched then record a
2012: * placeholder to skip later glob calls.
2013: */
2014: debug2("%s line %d: no match for %s",
2015: filename, linenum, arg);
2016: item = xcalloc(1, sizeof(*item));
2017: item->selector = strdup(arg);
2018: TAILQ_INSERT_TAIL(includes,
2019: item, entry);
2020: }
2021: if (gbuf.gl_pathc > INT_MAX)
1.371 djm 2022: fatal_f("too many glob results");
1.360 djm 2023: for (n = 0; n < (int)gbuf.gl_pathc; n++) {
2024: debug2("%s line %d: including %s",
2025: filename, linenum, gbuf.gl_pathv[n]);
2026: item = xcalloc(1, sizeof(*item));
2027: item->selector = strdup(arg);
2028: item->filename = strdup(gbuf.gl_pathv[n]);
1.371 djm 2029: if ((item->contents = sshbuf_new()) == NULL)
2030: fatal_f("sshbuf_new failed");
1.360 djm 2031: load_server_config(item->filename,
2032: item->contents);
2033: parse_server_config_depth(options,
2034: item->filename, item->contents,
2035: includes, connectinfo,
1.365 djm 2036: (*inc_flags & SSHCFG_MATCH_ONLY
2037: ? SSHCFG_MATCH_ONLY : (oactive
2038: ? 0 : SSHCFG_NEVERMATCH)),
1.360 djm 2039: activep, depth + 1);
2040: *activep = oactive;
2041: TAILQ_INSERT_TAIL(includes, item, entry);
2042: }
2043: globfree(&gbuf);
2044: free(arg);
2045: }
2046: if (value == 0) {
2047: fatal("%s line %d: Include missing filename argument",
2048: filename, linenum);
2049: }
2050: break;
2051:
1.153 dtucker 2052: case sMatch:
2053: if (cmdline)
2054: fatal("Match directive not supported as a command-line "
2055: "option");
1.365 djm 2056: value = match_cfg_line(&cp, linenum,
2057: (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
1.153 dtucker 2058: if (value < 0)
2059: fatal("%s line %d: Bad Match condition", filename,
2060: linenum);
1.365 djm 2061: *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
2062: /* The MATCH_ONLY is applicable only until the first match block */
2063: *inc_flags &= ~SSHCFG_MATCH_ONLY;
1.156 dtucker 2064: break;
2065:
1.330 djm 2066: case sPermitListen:
1.156 dtucker 2067: case sPermitOpen:
1.330 djm 2068: if (opcode == sPermitListen) {
2069: uintptr = &options->num_permitted_listens;
2070: chararrayptr = &options->permitted_listens;
1.329 djm 2071: } else {
2072: uintptr = &options->num_permitted_opens;
2073: chararrayptr = &options->permitted_opens;
2074: }
1.156 dtucker 2075: arg = strdelim(&cp);
2076: if (!arg || *arg == '\0')
1.329 djm 2077: fatal("%s line %d: missing %s specification",
2078: filename, linenum, lookup_opcode_name(opcode));
2079: uvalue = *uintptr; /* modified later */
1.310 djm 2080: if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
1.329 djm 2081: if (*activep && uvalue == 0) {
2082: *uintptr = 1;
2083: *chararrayptr = xcalloc(1,
2084: sizeof(**chararrayptr));
2085: (*chararrayptr)[0] = xstrdup(arg);
1.311 dtucker 2086: }
1.156 dtucker 2087: break;
2088: }
1.159 dtucker 2089: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1.333 djm 2090: if (opcode == sPermitListen &&
2091: strchr(arg, ':') == NULL) {
2092: /*
2093: * Allow bare port number for PermitListen
2094: * to indicate a wildcard listen host.
2095: */
2096: xasprintf(&arg2, "*:%s", arg);
2097: } else {
2098: arg2 = xstrdup(arg);
1.348 dtucker 2099: ch = '\0';
1.347 dtucker 2100: p = hpdelim2(&arg, &ch);
2101: if (p == NULL || ch == '/') {
1.333 djm 2102: fatal("%s line %d: missing host in %s",
2103: filename, linenum,
2104: lookup_opcode_name(opcode));
2105: }
2106: p = cleanhostname(p);
1.329 djm 2107: }
2108: if (arg == NULL ||
2109: ((port = permitopen_port(arg)) < 0)) {
2110: fatal("%s line %d: bad port number in %s",
2111: filename, linenum,
2112: lookup_opcode_name(opcode));
2113: }
2114: if (*activep && uvalue == 0) {
1.376 markus 2115: opt_array_append(filename, linenum,
1.329 djm 2116: lookup_opcode_name(opcode),
2117: chararrayptr, uintptr, arg2);
1.314 djm 2118: }
2119: free(arg2);
1.159 dtucker 2120: }
1.153 dtucker 2121: break;
2122:
1.158 dtucker 2123: case sForceCommand:
1.262 dtucker 2124: if (cp == NULL || *cp == '\0')
1.158 dtucker 2125: fatal("%.200s line %d: Missing argument.", filename,
2126: linenum);
2127: len = strspn(cp, WHITESPACE);
2128: if (*activep && options->adm_forced_command == NULL)
2129: options->adm_forced_command = xstrdup(cp + len);
2130: return 0;
2131:
1.176 djm 2132: case sChrootDirectory:
2133: charptr = &options->chroot_directory;
1.177 djm 2134:
2135: arg = strdelim(&cp);
2136: if (!arg || *arg == '\0')
2137: fatal("%s line %d: missing file name.",
2138: filename, linenum);
2139: if (*activep && *charptr == NULL)
2140: *charptr = xstrdup(arg);
2141: break;
1.176 djm 2142:
1.204 djm 2143: case sTrustedUserCAKeys:
2144: charptr = &options->trusted_user_ca_keys;
2145: goto parse_filename;
2146:
2147: case sRevokedKeys:
2148: charptr = &options->revoked_keys_file;
2149: goto parse_filename;
2150:
1.355 djm 2151: case sSecurityKeyProvider:
2152: charptr = &options->sk_provider;
1.356 djm 2153: arg = strdelim(&cp);
2154: if (!arg || *arg == '\0')
2155: fatal("%s line %d: missing file name.",
2156: filename, linenum);
2157: if (*activep && *charptr == NULL) {
2158: *charptr = strcasecmp(arg, "internal") == 0 ?
2159: xstrdup(arg) : derelativise_path(arg);
2160: /* increase optional counter */
2161: if (intptr != NULL)
2162: *intptr = *intptr + 1;
2163: }
2164: break;
1.355 djm 2165:
1.213 djm 2166: case sIPQoS:
2167: arg = strdelim(&cp);
2168: if ((value = parse_ipqos(arg)) == -1)
2169: fatal("%s line %d: Bad IPQoS value: %s",
2170: filename, linenum, arg);
2171: arg = strdelim(&cp);
2172: if (arg == NULL)
2173: value2 = value;
2174: else if ((value2 = parse_ipqos(arg)) == -1)
2175: fatal("%s line %d: Bad IPQoS value: %s",
2176: filename, linenum, arg);
2177: if (*activep) {
2178: options->ip_qos_interactive = value;
2179: options->ip_qos_bulk = value2;
2180: }
2181: break;
2182:
1.225 djm 2183: case sVersionAddendum:
1.262 dtucker 2184: if (cp == NULL || *cp == '\0')
1.225 djm 2185: fatal("%.200s line %d: Missing argument.", filename,
2186: linenum);
2187: len = strspn(cp, WHITESPACE);
2188: if (*activep && options->version_addendum == NULL) {
2189: if (strcasecmp(cp + len, "none") == 0)
2190: options->version_addendum = xstrdup("");
2191: else if (strchr(cp + len, '\r') != NULL)
2192: fatal("%.200s line %d: Invalid argument",
2193: filename, linenum);
2194: else
2195: options->version_addendum = xstrdup(cp + len);
2196: }
2197: return 0;
2198:
1.231 djm 2199: case sAuthorizedKeysCommand:
1.255 jsg 2200: if (cp == NULL)
2201: fatal("%.200s line %d: Missing argument.", filename,
2202: linenum);
1.231 djm 2203: len = strspn(cp, WHITESPACE);
2204: if (*activep && options->authorized_keys_command == NULL) {
2205: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2206: fatal("%.200s line %d: AuthorizedKeysCommand "
2207: "must be an absolute path",
2208: filename, linenum);
2209: options->authorized_keys_command = xstrdup(cp + len);
2210: }
2211: return 0;
2212:
2213: case sAuthorizedKeysCommandUser:
2214: charptr = &options->authorized_keys_command_user;
2215:
2216: arg = strdelim(&cp);
1.255 jsg 2217: if (!arg || *arg == '\0')
2218: fatal("%s line %d: missing AuthorizedKeysCommandUser "
2219: "argument.", filename, linenum);
1.231 djm 2220: if (*activep && *charptr == NULL)
2221: *charptr = xstrdup(arg);
2222: break;
2223:
1.270 djm 2224: case sAuthorizedPrincipalsCommand:
2225: if (cp == NULL)
2226: fatal("%.200s line %d: Missing argument.", filename,
2227: linenum);
2228: len = strspn(cp, WHITESPACE);
2229: if (*activep &&
2230: options->authorized_principals_command == NULL) {
2231: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
2232: fatal("%.200s line %d: "
2233: "AuthorizedPrincipalsCommand must be "
2234: "an absolute path", filename, linenum);
2235: options->authorized_principals_command =
2236: xstrdup(cp + len);
2237: }
2238: return 0;
2239:
2240: case sAuthorizedPrincipalsCommandUser:
2241: charptr = &options->authorized_principals_command_user;
2242:
2243: arg = strdelim(&cp);
2244: if (!arg || *arg == '\0')
2245: fatal("%s line %d: missing "
2246: "AuthorizedPrincipalsCommandUser argument.",
2247: filename, linenum);
2248: if (*activep && *charptr == NULL)
2249: *charptr = xstrdup(arg);
2250: break;
2251:
1.232 djm 2252: case sAuthenticationMethods:
1.268 djm 2253: if (options->num_auth_methods == 0) {
1.291 djm 2254: value = 0; /* seen "any" pseudo-method */
1.328 djm 2255: value2 = 0; /* successfully parsed any method */
1.232 djm 2256: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.291 djm 2257: if (strcmp(arg, "any") == 0) {
2258: if (options->num_auth_methods > 0) {
2259: fatal("%s line %d: \"any\" "
2260: "must appear alone in "
2261: "AuthenticationMethods",
2262: filename, linenum);
2263: }
2264: value = 1;
2265: } else if (value) {
2266: fatal("%s line %d: \"any\" must appear "
2267: "alone in AuthenticationMethods",
2268: filename, linenum);
2269: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 2270: fatal("%s line %d: invalid "
2271: "authentication method list.",
2272: filename, linenum);
1.291 djm 2273: }
1.292 djm 2274: value2 = 1;
1.268 djm 2275: if (!*activep)
2276: continue;
1.376 markus 2277: opt_array_append(filename, linenum,
1.314 djm 2278: "AuthenticationMethods",
2279: &options->auth_methods,
2280: &options->num_auth_methods, arg);
1.232 djm 2281: }
1.292 djm 2282: if (value2 == 0) {
1.291 djm 2283: fatal("%s line %d: no AuthenticationMethods "
2284: "specified", filename, linenum);
2285: }
1.232 djm 2286: }
2287: return 0;
2288:
1.251 millert 2289: case sStreamLocalBindMask:
2290: arg = strdelim(&cp);
2291: if (!arg || *arg == '\0')
1.268 djm 2292: fatal("%s line %d: missing StreamLocalBindMask "
2293: "argument.", filename, linenum);
1.251 millert 2294: /* Parse mode in octal format */
2295: value = strtol(arg, &p, 8);
2296: if (arg == p || value < 0 || value > 0777)
2297: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 2298: if (*activep)
2299: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 2300: break;
2301:
2302: case sStreamLocalBindUnlink:
2303: intptr = &options->fwd_opts.streamlocal_bind_unlink;
2304: goto parse_flag;
2305:
1.256 djm 2306: case sFingerprintHash:
2307: arg = strdelim(&cp);
2308: if (!arg || *arg == '\0')
2309: fatal("%.200s line %d: Missing argument.",
2310: filename, linenum);
2311: if ((value = ssh_digest_alg_by_name(arg)) == -1)
2312: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
2313: filename, linenum, arg);
2314: if (*activep)
2315: options->fingerprint_hash = value;
2316: break;
2317:
1.309 djm 2318: case sExposeAuthInfo:
2319: intptr = &options->expose_userauth_info;
2320: goto parse_flag;
2321:
1.316 djm 2322: case sRDomain:
2323: charptr = &options->routing_domain;
2324: arg = strdelim(&cp);
2325: if (!arg || *arg == '\0')
2326: fatal("%.200s line %d: Missing argument.",
2327: filename, linenum);
2328: if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
2329: !valid_rdomain(arg))
2330: fatal("%s line %d: bad routing domain",
2331: filename, linenum);
2332: if (*activep && *charptr == NULL)
2333: *charptr = xstrdup(arg);
1.321 dtucker 2334: break;
1.316 djm 2335:
1.94 markus 2336: case sDeprecated:
1.295 djm 2337: case sIgnore:
1.121 jakob 2338: case sUnsupported:
1.295 djm 2339: do_log2(opcode == sIgnore ?
2340: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
2341: "%s line %d: %s option %s", filename, linenum,
2342: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 2343: while (arg)
2344: arg = strdelim(&cp);
2345: break;
2346:
2347: default:
2348: fatal("%s line %d: Missing handler for opcode %s (%d)",
2349: filename, linenum, arg, opcode);
2350: }
2351: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
2352: fatal("%s line %d: garbage at end of line; \"%.200s\".",
2353: filename, linenum, arg);
2354: return 0;
2355: }
2356:
1.360 djm 2357: int
2358: process_server_config_line(ServerOptions *options, char *line,
2359: const char *filename, int linenum, int *activep,
2360: struct connection_info *connectinfo, struct include_list *includes)
2361: {
1.365 djm 2362: int inc_flags = 0;
2363:
1.360 djm 2364: return process_server_config_line_depth(options, line, filename,
1.365 djm 2365: linenum, activep, connectinfo, &inc_flags, 0, includes);
1.360 djm 2366: }
2367:
2368:
1.94 markus 2369: /* Reads the server configuration file. */
1.25 markus 2370:
1.94 markus 2371: void
1.338 markus 2372: load_server_config(const char *filename, struct sshbuf *conf)
1.94 markus 2373: {
1.366 markus 2374: struct stat st;
1.331 markus 2375: char *line = NULL, *cp;
2376: size_t linesize = 0;
1.94 markus 2377: FILE *f;
1.338 markus 2378: int r, lineno = 0;
1.81 stevesk 2379:
1.371 djm 2380: debug2_f("filename %s", filename);
1.134 djm 2381: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 2382: perror(filename);
2383: exit(1);
2384: }
1.338 markus 2385: sshbuf_reset(conf);
1.366 markus 2386: /* grow buffer, so realloc is avoided for large config files */
2387: if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
2388: (r = sshbuf_allocate(conf, st.st_size)) != 0)
1.371 djm 2389: fatal_fr(r, "allocate");
1.331 markus 2390: while (getline(&line, &linesize, f) != -1) {
1.229 dtucker 2391: lineno++;
1.134 djm 2392: /*
2393: * Trim out comments and strip whitespace
1.135 deraadt 2394: * NB - preserve newlines, they are needed to reproduce
1.134 djm 2395: * line numbers later for error messages
2396: */
2397: if ((cp = strchr(line, '#')) != NULL)
2398: memcpy(cp, "\n", 2);
2399: cp = line + strspn(line, " \t\r");
1.338 markus 2400: if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
1.371 djm 2401: fatal_fr(r, "sshbuf_put");
1.134 djm 2402: }
1.331 markus 2403: free(line);
1.338 markus 2404: if ((r = sshbuf_put_u8(conf, 0)) != 0)
1.371 djm 2405: fatal_fr(r, "sshbuf_put_u8");
1.134 djm 2406: fclose(f);
1.371 djm 2407: debug2_f("done config len = %zu", sshbuf_len(conf));
1.134 djm 2408: }
2409:
2410: void
1.226 dtucker 2411: parse_server_match_config(ServerOptions *options,
1.360 djm 2412: struct include_list *includes, struct connection_info *connectinfo)
1.153 dtucker 2413: {
2414: ServerOptions mo;
2415:
2416: initialize_server_options(&mo);
1.360 djm 2417: parse_server_config(&mo, "reprocess config", cfg, includes,
2418: connectinfo);
1.168 dtucker 2419: copy_set_server_options(options, &mo, 0);
1.153 dtucker 2420: }
2421:
1.226 dtucker 2422: int parse_server_match_testspec(struct connection_info *ci, char *spec)
2423: {
2424: char *p;
2425:
2426: while ((p = strsep(&spec, ",")) && *p != '\0') {
2427: if (strncmp(p, "addr=", 5) == 0) {
2428: ci->address = xstrdup(p + 5);
2429: } else if (strncmp(p, "host=", 5) == 0) {
2430: ci->host = xstrdup(p + 5);
2431: } else if (strncmp(p, "user=", 5) == 0) {
2432: ci->user = xstrdup(p + 5);
2433: } else if (strncmp(p, "laddr=", 6) == 0) {
2434: ci->laddress = xstrdup(p + 6);
1.317 djm 2435: } else if (strncmp(p, "rdomain=", 8) == 0) {
2436: ci->rdomain = xstrdup(p + 8);
1.226 dtucker 2437: } else if (strncmp(p, "lport=", 6) == 0) {
2438: ci->lport = a2port(p + 6);
2439: if (ci->lport == -1) {
2440: fprintf(stderr, "Invalid port '%s' in test mode"
2441: " specification %s\n", p+6, p);
2442: return -1;
2443: }
2444: } else {
2445: fprintf(stderr, "Invalid test mode specification %s\n",
2446: p);
2447: return -1;
2448: }
2449: }
2450: return 0;
2451: }
2452:
1.168 dtucker 2453: /*
2454: * Copy any supported values that are set.
2455: *
1.195 jj 2456: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 2457: * array values that are not used pre-authentication, because any that we
1.328 djm 2458: * do use must be explicitly sent in mm_getpwnamallow().
1.168 dtucker 2459: */
1.153 dtucker 2460: void
1.168 dtucker 2461: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 2462: {
1.247 djm 2463: #define M_CP_INTOPT(n) do {\
2464: if (src->n != -1) \
2465: dst->n = src->n; \
2466: } while (0)
2467:
1.168 dtucker 2468: M_CP_INTOPT(password_authentication);
2469: M_CP_INTOPT(gss_authentication);
2470: M_CP_INTOPT(pubkey_authentication);
1.354 djm 2471: M_CP_INTOPT(pubkey_auth_options);
1.168 dtucker 2472: M_CP_INTOPT(kerberos_authentication);
2473: M_CP_INTOPT(hostbased_authentication);
1.209 djm 2474: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 2475: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 2476: M_CP_INTOPT(permit_root_login);
1.188 djm 2477: M_CP_INTOPT(permit_empty_passwd);
1.362 djm 2478: M_CP_INTOPT(ignore_rhosts);
1.168 dtucker 2479:
2480: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 2481: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 2482: M_CP_INTOPT(allow_agent_forwarding);
1.301 djm 2483: M_CP_INTOPT(disable_forwarding);
1.309 djm 2484: M_CP_INTOPT(expose_userauth_info);
1.209 djm 2485: M_CP_INTOPT(permit_tun);
1.251 millert 2486: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 2487: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 2488: M_CP_INTOPT(x11_display_offset);
2489: M_CP_INTOPT(x11_forwarding);
2490: M_CP_INTOPT(x11_use_localhost);
1.244 djm 2491: M_CP_INTOPT(permit_tty);
1.250 djm 2492: M_CP_INTOPT(permit_user_rc);
1.180 djm 2493: M_CP_INTOPT(max_sessions);
1.184 dtucker 2494: M_CP_INTOPT(max_authtries);
1.300 markus 2495: M_CP_INTOPT(client_alive_count_max);
2496: M_CP_INTOPT(client_alive_interval);
1.213 djm 2497: M_CP_INTOPT(ip_qos_interactive);
2498: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 2499: M_CP_INTOPT(rekey_limit);
2500: M_CP_INTOPT(rekey_interval);
1.308 djm 2501: M_CP_INTOPT(log_level);
1.289 djm 2502:
2503: /*
2504: * The bind_mask is a mode_t that may be unsigned, so we can't use
2505: * M_CP_INTOPT - it does a signed comparison that causes compiler
2506: * warnings.
2507: */
1.290 dtucker 2508: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 2509: dst->fwd_opts.streamlocal_bind_mask =
2510: src->fwd_opts.streamlocal_bind_mask;
2511: }
1.247 djm 2512:
2513: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
2514: #define M_CP_STROPT(n) do {\
2515: if (src->n != NULL && dst->n != src->n) { \
2516: free(dst->n); \
2517: dst->n = src->n; \
2518: } \
2519: } while(0)
1.314 djm 2520: #define M_CP_STRARRAYOPT(s, num_s) do {\
2521: u_int i; \
2522: if (src->num_s != 0) { \
2523: for (i = 0; i < dst->num_s; i++) \
2524: free(dst->s[i]); \
2525: free(dst->s); \
2526: dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
2527: for (i = 0; i < src->num_s; i++) \
2528: dst->s[i] = xstrdup(src->s[i]); \
2529: dst->num_s = src->num_s; \
1.312 djm 2530: } \
2531: } while(0)
1.168 dtucker 2532:
1.218 djm 2533: /* See comment in servconf.h */
2534: COPY_MATCH_STRING_OPTS();
1.282 djm 2535:
2536: /* Arguments that accept '+...' need to be expanded */
2537: assemble_algorithms(dst);
1.216 djm 2538:
1.217 dtucker 2539: /*
2540: * The only things that should be below this point are string options
2541: * which are only used after authentication.
2542: */
1.168 dtucker 2543: if (preauth)
2544: return;
1.219 djm 2545:
1.283 djm 2546: /* These options may be "none" to clear a global setting */
1.168 dtucker 2547: M_CP_STROPT(adm_forced_command);
1.283 djm 2548: if (option_clear_or_none(dst->adm_forced_command)) {
2549: free(dst->adm_forced_command);
2550: dst->adm_forced_command = NULL;
2551: }
1.176 djm 2552: M_CP_STROPT(chroot_directory);
1.283 djm 2553: if (option_clear_or_none(dst->chroot_directory)) {
2554: free(dst->chroot_directory);
2555: dst->chroot_directory = NULL;
2556: }
1.153 dtucker 2557: }
1.168 dtucker 2558:
2559: #undef M_CP_INTOPT
2560: #undef M_CP_STROPT
1.219 djm 2561: #undef M_CP_STRARRAYOPT
1.153 dtucker 2562:
1.360 djm 2563: #define SERVCONF_MAX_DEPTH 16
1.364 djm 2564: static void
1.360 djm 2565: parse_server_config_depth(ServerOptions *options, const char *filename,
2566: struct sshbuf *conf, struct include_list *includes,
2567: struct connection_info *connectinfo, int flags, int *activep, int depth)
1.134 djm 2568: {
1.360 djm 2569: int linenum, bad_options = 0;
1.136 dtucker 2570: char *cp, *obuf, *cbuf;
1.134 djm 2571:
1.360 djm 2572: if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
2573: fatal("Too many recursive configuration includes");
2574:
1.371 djm 2575: debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
1.365 djm 2576: (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
1.134 djm 2577:
1.287 djm 2578: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
1.371 djm 2579: fatal_f("sshbuf_dup_string failed");
1.137 dtucker 2580: linenum = 1;
1.140 deraadt 2581: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.360 djm 2582: if (process_server_config_line_depth(options, cp,
1.365 djm 2583: filename, linenum++, activep, connectinfo, &flags,
1.360 djm 2584: depth, includes) != 0)
1.94 markus 2585: bad_options++;
1.1 deraadt 2586: }
1.239 djm 2587: free(obuf);
1.78 stevesk 2588: if (bad_options > 0)
2589: fatal("%s: terminating, %d bad configuration options",
2590: filename, bad_options);
1.360 djm 2591: }
2592:
2593: void
2594: parse_server_config(ServerOptions *options, const char *filename,
2595: struct sshbuf *conf, struct include_list *includes,
2596: struct connection_info *connectinfo)
2597: {
2598: int active = connectinfo ? 0 : 1;
2599: parse_server_config_depth(options, filename, conf, includes,
1.365 djm 2600: connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
1.364 djm 2601: process_queued_listen_addrs(options);
1.182 dtucker 2602: }
2603:
2604: static const char *
1.221 djm 2605: fmt_multistate_int(int val, const struct multistate *m)
2606: {
2607: u_int i;
2608:
2609: for (i = 0; m[i].key != NULL; i++) {
2610: if (m[i].value == val)
2611: return m[i].key;
2612: }
2613: return "UNKNOWN";
2614: }
2615:
2616: static const char *
1.182 dtucker 2617: fmt_intarg(ServerOpCodes code, int val)
2618: {
1.221 djm 2619: if (val == -1)
2620: return "unset";
2621: switch (code) {
2622: case sAddressFamily:
2623: return fmt_multistate_int(val, multistate_addressfamily);
2624: case sPermitRootLogin:
2625: return fmt_multistate_int(val, multistate_permitrootlogin);
2626: case sGatewayPorts:
2627: return fmt_multistate_int(val, multistate_gatewayports);
2628: case sCompression:
2629: return fmt_multistate_int(val, multistate_compression);
1.233 djm 2630: case sAllowTcpForwarding:
2631: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2632: case sAllowStreamLocalForwarding:
2633: return fmt_multistate_int(val, multistate_tcpfwd);
1.363 djm 2634: case sIgnoreRhosts:
2635: return fmt_multistate_int(val, multistate_ignore_rhosts);
1.256 djm 2636: case sFingerprintHash:
2637: return ssh_digest_alg_name(val);
1.221 djm 2638: default:
2639: switch (val) {
2640: case 0:
2641: return "no";
2642: case 1:
2643: return "yes";
2644: default:
2645: return "UNKNOWN";
2646: }
1.182 dtucker 2647: }
2648: }
2649:
2650: static void
2651: dump_cfg_int(ServerOpCodes code, int val)
2652: {
2653: printf("%s %d\n", lookup_opcode_name(code), val);
2654: }
2655:
2656: static void
1.263 dtucker 2657: dump_cfg_oct(ServerOpCodes code, int val)
2658: {
2659: printf("%s 0%o\n", lookup_opcode_name(code), val);
2660: }
2661:
2662: static void
1.182 dtucker 2663: dump_cfg_fmtint(ServerOpCodes code, int val)
2664: {
2665: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2666: }
2667:
2668: static void
2669: dump_cfg_string(ServerOpCodes code, const char *val)
2670: {
1.257 djm 2671: printf("%s %s\n", lookup_opcode_name(code),
2672: val == NULL ? "none" : val);
1.182 dtucker 2673: }
2674:
2675: static void
2676: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2677: {
2678: u_int i;
2679:
2680: for (i = 0; i < count; i++)
1.219 djm 2681: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2682: }
2683:
2684: static void
2685: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2686: {
2687: u_int i;
2688:
1.291 djm 2689: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2690: return;
1.219 djm 2691: printf("%s", lookup_opcode_name(code));
2692: for (i = 0; i < count; i++)
2693: printf(" %s", vals[i]);
1.291 djm 2694: if (code == sAuthenticationMethods && count == 0)
2695: printf(" any");
1.219 djm 2696: printf("\n");
1.182 dtucker 2697: }
2698:
1.315 djm 2699: static char *
2700: format_listen_addrs(struct listenaddr *la)
1.182 dtucker 2701: {
1.315 djm 2702: int r;
1.182 dtucker 2703: struct addrinfo *ai;
1.315 djm 2704: char addr[NI_MAXHOST], port[NI_MAXSERV];
1.263 dtucker 2705: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2706:
1.263 dtucker 2707: /*
2708: * ListenAddress must be after Port. add_one_listen_addr pushes
2709: * addresses onto a stack, so to maintain ordering we need to
2710: * print these in reverse order.
2711: */
1.315 djm 2712: for (ai = la->addrs; ai; ai = ai->ai_next) {
2713: if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1.182 dtucker 2714: sizeof(addr), port, sizeof(port),
2715: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.315 djm 2716: error("getnameinfo: %.100s", ssh_gai_strerror(r));
2717: continue;
2718: }
2719: laddr2 = laddr1;
2720: if (ai->ai_family == AF_INET6) {
2721: xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
2722: addr, port,
2723: la->rdomain == NULL ? "" : " rdomain ",
2724: la->rdomain == NULL ? "" : la->rdomain,
2725: laddr2);
1.182 dtucker 2726: } else {
1.315 djm 2727: xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
2728: addr, port,
2729: la->rdomain == NULL ? "" : " rdomain ",
2730: la->rdomain == NULL ? "" : la->rdomain,
2731: laddr2);
1.182 dtucker 2732: }
1.315 djm 2733: free(laddr2);
2734: }
2735: return laddr1;
2736: }
2737:
2738: void
2739: dump_config(ServerOptions *o)
2740: {
2741: char *s;
2742: u_int i;
2743:
2744: /* these are usually at the top of the config */
2745: for (i = 0; i < o->num_ports; i++)
2746: printf("port %d\n", o->ports[i]);
2747: dump_cfg_fmtint(sAddressFamily, o->address_family);
2748:
2749: for (i = 0; i < o->num_listen_addrs; i++) {
2750: s = format_listen_addrs(&o->listen_addrs[i]);
2751: printf("%s", s);
2752: free(s);
1.182 dtucker 2753: }
2754:
2755: /* integer arguments */
2756: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2757: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2758: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2759: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2760: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2761: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2762: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2763:
2764: /* formatted integer arguments */
2765: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2766: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2767: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2768: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2769: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2770: o->hostbased_uses_name_from_packet_only);
2771: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2772: #ifdef KRB5
1.182 dtucker 2773: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2774: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2775: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2776: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2777: #endif
2778: #ifdef GSSAPI
1.182 dtucker 2779: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2780: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2781: #endif
1.182 dtucker 2782: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2783: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2784: o->kbd_interactive_authentication);
2785: dump_cfg_fmtint(sChallengeResponseAuthentication,
2786: o->challenge_response_authentication);
2787: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2788: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2789: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2790: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2791: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2792: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2793: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2794: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2795: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2796: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2797: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2798: dump_cfg_fmtint(sUseDNS, o->use_dns);
2799: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2800: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.301 djm 2801: dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
1.251 millert 2802: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2803: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.256 djm 2804: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.309 djm 2805: dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
1.182 dtucker 2806:
2807: /* string arguments */
2808: dump_cfg_string(sPidFile, o->pid_file);
2809: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.358 dtucker 2810: dump_cfg_string(sCiphers, o->ciphers);
2811: dump_cfg_string(sMacs, o->macs);
1.182 dtucker 2812: dump_cfg_string(sBanner, o->banner);
2813: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2814: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2815: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2816: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.355 djm 2817: dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
1.208 djm 2818: dump_cfg_string(sAuthorizedPrincipalsFile,
2819: o->authorized_principals_file);
1.261 dtucker 2820: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2821: ? "none" : o->version_addendum);
1.231 djm 2822: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2823: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2824: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2825: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2826: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.358 dtucker 2827: dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
2828: dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
1.375 dtucker 2829: dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
1.358 dtucker 2830: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
1.374 dtucker 2831: dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
1.316 djm 2832: dump_cfg_string(sRDomain, o->routing_domain);
1.182 dtucker 2833:
2834: /* string arguments requiring a lookup */
2835: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2836: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2837:
2838: /* string array arguments */
1.219 djm 2839: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2840: o->authorized_keys_files);
1.182 dtucker 2841: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2842: o->host_key_files);
1.261 dtucker 2843: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2844: o->host_cert_files);
1.182 dtucker 2845: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2846: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2847: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2848: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2849: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.332 djm 2850: dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
1.232 djm 2851: dump_cfg_strarray_oneline(sAuthenticationMethods,
2852: o->num_auth_methods, o->auth_methods);
1.370 djm 2853: dump_cfg_strarray_oneline(sLogVerbose,
2854: o->num_log_verbose, o->log_verbose);
1.182 dtucker 2855:
2856: /* other arguments */
2857: for (i = 0; i < o->num_subsystems; i++)
2858: printf("subsystem %s %s\n", o->subsystem_name[i],
2859: o->subsystem_args[i]);
2860:
2861: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2862: o->max_startups_rate, o->max_startups);
1.372 dtucker 2863: printf("persourcemaxstartups ");
2864: if (o->per_source_max_startups == INT_MAX)
2865: printf("none\n");
2866: else
2867: printf("%d\n", o->per_source_max_startups);
1.373 dtucker 2868: printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
1.372 dtucker 2869: o->per_source_masklen_ipv6);
1.182 dtucker 2870:
1.318 djm 2871: s = NULL;
2872: for (i = 0; tunmode_desc[i].val != -1; i++) {
1.182 dtucker 2873: if (tunmode_desc[i].val == o->permit_tun) {
2874: s = tunmode_desc[i].text;
2875: break;
2876: }
1.318 djm 2877: }
1.182 dtucker 2878: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2879:
1.214 stevesk 2880: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2881: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2882:
1.284 dtucker 2883: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2884: o->rekey_interval);
1.182 dtucker 2885:
1.310 djm 2886: printf("permitopen");
2887: if (o->num_permitted_opens == 0)
2888: printf(" any");
2889: else {
2890: for (i = 0; i < o->num_permitted_opens; i++)
2891: printf(" %s", o->permitted_opens[i]);
1.329 djm 2892: }
2893: printf("\n");
1.330 djm 2894: printf("permitlisten");
2895: if (o->num_permitted_listens == 0)
1.329 djm 2896: printf(" any");
2897: else {
1.330 djm 2898: for (i = 0; i < o->num_permitted_listens; i++)
2899: printf(" %s", o->permitted_listens[i]);
1.310 djm 2900: }
2901: printf("\n");
1.334 djm 2902:
1.367 djm 2903: if (o->permit_user_env_allowlist == NULL) {
1.334 djm 2904: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2905: } else {
2906: printf("permituserenvironment %s\n",
1.367 djm 2907: o->permit_user_env_allowlist);
1.334 djm 2908: }
2909:
1.354 djm 2910: printf("pubkeyauthoptions");
2911: if (o->pubkey_auth_options == 0)
2912: printf(" none");
2913: if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
2914: printf(" touch-required");
1.368 djm 2915: if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
2916: printf(" verify-required");
1.354 djm 2917: printf("\n");
1.1 deraadt 2918: }
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