Annotation of src/usr.bin/ssh/servconf.c, Revision 1.297
1.226 dtucker 1:
1.297 ! djm 2: /* $OpenBSD: servconf.c,v 1.296 2016/09/28 16:33:07 djm Exp $ */
1.1 deraadt 3: /*
1.26 deraadt 4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
1.34 markus 6: *
1.51 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 12: */
1.1 deraadt 13:
1.152 stevesk 14: #include <sys/types.h>
15: #include <sys/socket.h>
1.179 djm 16: #include <sys/queue.h>
1.154 stevesk 17:
1.213 djm 18: #include <netinet/in.h>
19: #include <netinet/ip.h>
20:
1.235 dtucker 21: #include <ctype.h>
1.154 stevesk 22: #include <netdb.h>
1.165 dtucker 23: #include <pwd.h>
1.162 stevesk 24: #include <stdio.h>
1.161 stevesk 25: #include <stdlib.h>
1.160 stevesk 26: #include <string.h>
1.164 deraadt 27: #include <signal.h>
1.155 stevesk 28: #include <unistd.h>
1.259 deraadt 29: #include <limits.h>
1.164 deraadt 30: #include <stdarg.h>
1.182 dtucker 31: #include <errno.h>
1.236 dtucker 32: #include <util.h>
1.1 deraadt 33:
1.164 deraadt 34: #include "xmalloc.h"
1.1 deraadt 35: #include "ssh.h"
1.62 markus 36: #include "log.h"
1.164 deraadt 37: #include "buffer.h"
1.251 millert 38: #include "misc.h"
1.1 deraadt 39: #include "servconf.h"
1.33 markus 40: #include "compat.h"
1.60 markus 41: #include "pathnames.h"
1.62 markus 42: #include "cipher.h"
1.164 deraadt 43: #include "key.h"
1.66 markus 44: #include "kex.h"
45: #include "mac.h"
1.153 dtucker 46: #include "match.h"
1.156 dtucker 47: #include "channels.h"
1.165 dtucker 48: #include "groupaccess.h"
1.226 dtucker 49: #include "canohost.h"
50: #include "packet.h"
1.232 djm 51: #include "hostfile.h"
52: #include "auth.h"
1.252 djm 53: #include "myproposal.h"
1.256 djm 54: #include "digest.h"
1.1 deraadt 55:
1.194 djm 56: static void add_listen_addr(ServerOptions *, char *, int);
57: static void add_one_listen_addr(ServerOptions *, char *, int);
1.29 markus 58:
1.102 provos 59: /* Use of privilege separation or not */
60: extern int use_privsep;
1.153 dtucker 61: extern Buffer cfg;
1.62 markus 62:
1.1 deraadt 63: /* Initializes the server options to their default values. */
64:
1.34 markus 65: void
1.25 markus 66: initialize_server_options(ServerOptions *options)
1.1 deraadt 67: {
1.25 markus 68: memset(options, 0, sizeof(*options));
1.29 markus 69: options->num_ports = 0;
70: options->ports_from_cmdline = 0;
1.266 dtucker 71: options->queued_listen_addrs = NULL;
72: options->num_queued_listens = 0;
1.29 markus 73: options->listen_addrs = NULL;
1.138 djm 74: options->address_family = -1;
1.54 markus 75: options->num_host_key_files = 0;
1.203 djm 76: options->num_host_cert_files = 0;
1.240 markus 77: options->host_key_agent = NULL;
1.36 markus 78: options->pid_file = NULL;
1.25 markus 79: options->login_grace_time = -1;
1.279 chris 80: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 81: options->ignore_rhosts = -1;
82: options->ignore_user_known_hosts = -1;
83: options->print_motd = -1;
1.72 stevesk 84: options->print_lastlog = -1;
1.25 markus 85: options->x11_forwarding = -1;
86: options->x11_display_offset = -1;
1.99 stevesk 87: options->x11_use_localhost = -1;
1.244 djm 88: options->permit_tty = -1;
1.250 djm 89: options->permit_user_rc = -1;
1.42 markus 90: options->xauth_location = NULL;
1.25 markus 91: options->strict_modes = -1;
1.129 markus 92: options->tcp_keep_alive = -1;
1.101 markus 93: options->log_facility = SYSLOG_FACILITY_NOT_SET;
94: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.75 markus 95: options->hostbased_authentication = -1;
96: options->hostbased_uses_name_from_packet_only = -1;
1.258 djm 97: options->hostbased_key_types = NULL;
1.276 markus 98: options->hostkeyalgorithms = NULL;
1.54 markus 99: options->pubkey_authentication = -1;
1.258 djm 100: options->pubkey_key_types = NULL;
1.25 markus 101: options->kerberos_authentication = -1;
102: options->kerberos_or_local_passwd = -1;
103: options->kerberos_ticket_cleanup = -1;
1.130 jakob 104: options->kerberos_get_afs_token = -1;
1.125 markus 105: options->gss_authentication=-1;
106: options->gss_cleanup_creds = -1;
1.271 djm 107: options->gss_strict_acceptor = -1;
1.25 markus 108: options->password_authentication = -1;
1.52 markus 109: options->kbd_interactive_authentication = -1;
1.80 markus 110: options->challenge_response_authentication = -1;
1.25 markus 111: options->permit_empty_passwd = -1;
1.113 markus 112: options->permit_user_env = -1;
1.111 markus 113: options->compression = -1;
1.235 dtucker 114: options->rekey_limit = -1;
115: options->rekey_interval = -1;
1.53 markus 116: options->allow_tcp_forwarding = -1;
1.251 millert 117: options->allow_streamlocal_forwarding = -1;
1.178 pyr 118: options->allow_agent_forwarding = -1;
1.25 markus 119: options->num_allow_users = 0;
120: options->num_deny_users = 0;
121: options->num_allow_groups = 0;
122: options->num_deny_groups = 0;
1.33 markus 123: options->ciphers = NULL;
1.66 markus 124: options->macs = NULL;
1.211 djm 125: options->kex_algorithms = NULL;
1.251 millert 126: options->fwd_opts.gateway_ports = -1;
127: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
128: options->fwd_opts.streamlocal_bind_unlink = -1;
1.43 jakob 129: options->num_subsystems = 0;
1.50 markus 130: options->max_startups_begin = -1;
131: options->max_startups_rate = -1;
1.46 markus 132: options->max_startups = -1;
1.133 dtucker 133: options->max_authtries = -1;
1.180 djm 134: options->max_sessions = -1;
1.57 markus 135: options->banner = NULL;
1.122 markus 136: options->use_dns = -1;
1.77 beck 137: options->client_alive_interval = -1;
138: options->client_alive_count_max = -1;
1.219 djm 139: options->num_authkeys_files = 0;
1.131 djm 140: options->num_accept_env = 0;
1.145 reyk 141: options->permit_tun = -1;
1.159 dtucker 142: options->num_permitted_opens = -1;
1.158 dtucker 143: options->adm_forced_command = NULL;
1.176 djm 144: options->chroot_directory = NULL;
1.231 djm 145: options->authorized_keys_command = NULL;
146: options->authorized_keys_command_user = NULL;
1.204 djm 147: options->revoked_keys_file = NULL;
148: options->trusted_user_ca_keys = NULL;
1.208 djm 149: options->authorized_principals_file = NULL;
1.270 djm 150: options->authorized_principals_command = NULL;
151: options->authorized_principals_command_user = NULL;
1.213 djm 152: options->ip_qos_interactive = -1;
153: options->ip_qos_bulk = -1;
1.225 djm 154: options->version_addendum = NULL;
1.256 djm 155: options->fingerprint_hash = -1;
1.1 deraadt 156: }
157:
1.257 djm 158: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
159: static int
160: option_clear_or_none(const char *o)
161: {
162: return o == NULL || strcasecmp(o, "none") == 0;
163: }
164:
1.282 djm 165: static void
166: assemble_algorithms(ServerOptions *o)
167: {
168: if (kex_assemble_names(KEX_SERVER_ENCRYPT, &o->ciphers) != 0 ||
169: kex_assemble_names(KEX_SERVER_MAC, &o->macs) != 0 ||
170: kex_assemble_names(KEX_SERVER_KEX, &o->kex_algorithms) != 0 ||
171: kex_assemble_names(KEX_DEFAULT_PK_ALG,
172: &o->hostkeyalgorithms) != 0 ||
173: kex_assemble_names(KEX_DEFAULT_PK_ALG,
174: &o->hostbased_key_types) != 0 ||
175: kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->pubkey_key_types) != 0)
176: fatal("kex_assemble_names failed");
177: }
178:
1.34 markus 179: void
1.25 markus 180: fill_default_server_options(ServerOptions *options)
1.1 deraadt 181: {
1.257 djm 182: int i;
183:
1.54 markus 184: if (options->num_host_key_files == 0) {
1.293 naddy 185: /* fill default hostkeys */
186: options->host_key_files[options->num_host_key_files++] =
187: _PATH_HOST_RSA_KEY_FILE;
188: options->host_key_files[options->num_host_key_files++] =
189: _PATH_HOST_DSA_KEY_FILE;
190: options->host_key_files[options->num_host_key_files++] =
191: _PATH_HOST_ECDSA_KEY_FILE;
192: options->host_key_files[options->num_host_key_files++] =
193: _PATH_HOST_ED25519_KEY_FILE;
1.54 markus 194: }
1.203 djm 195: /* No certificates by default */
1.29 markus 196: if (options->num_ports == 0)
197: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.266 dtucker 198: if (options->address_family == -1)
199: options->address_family = AF_UNSPEC;
1.29 markus 200: if (options->listen_addrs == NULL)
1.76 stevesk 201: add_listen_addr(options, NULL, 0);
1.36 markus 202: if (options->pid_file == NULL)
1.257 djm 203: options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
1.25 markus 204: if (options->login_grace_time == -1)
1.115 stevesk 205: options->login_grace_time = 120;
1.67 markus 206: if (options->permit_root_login == PERMIT_NOT_SET)
1.279 chris 207: options->permit_root_login = PERMIT_NO_PASSWD;
1.25 markus 208: if (options->ignore_rhosts == -1)
1.30 markus 209: options->ignore_rhosts = 1;
1.25 markus 210: if (options->ignore_user_known_hosts == -1)
211: options->ignore_user_known_hosts = 0;
212: if (options->print_motd == -1)
213: options->print_motd = 1;
1.72 stevesk 214: if (options->print_lastlog == -1)
215: options->print_lastlog = 1;
1.25 markus 216: if (options->x11_forwarding == -1)
1.30 markus 217: options->x11_forwarding = 0;
1.25 markus 218: if (options->x11_display_offset == -1)
1.30 markus 219: options->x11_display_offset = 10;
1.99 stevesk 220: if (options->x11_use_localhost == -1)
221: options->x11_use_localhost = 1;
1.42 markus 222: if (options->xauth_location == NULL)
1.257 djm 223: options->xauth_location = xstrdup(_PATH_XAUTH);
1.244 djm 224: if (options->permit_tty == -1)
225: options->permit_tty = 1;
1.250 djm 226: if (options->permit_user_rc == -1)
227: options->permit_user_rc = 1;
1.25 markus 228: if (options->strict_modes == -1)
229: options->strict_modes = 1;
1.129 markus 230: if (options->tcp_keep_alive == -1)
231: options->tcp_keep_alive = 1;
1.101 markus 232: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 233: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 234: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 235: options->log_level = SYSLOG_LEVEL_INFO;
1.75 markus 236: if (options->hostbased_authentication == -1)
237: options->hostbased_authentication = 0;
238: if (options->hostbased_uses_name_from_packet_only == -1)
239: options->hostbased_uses_name_from_packet_only = 0;
1.54 markus 240: if (options->pubkey_authentication == -1)
241: options->pubkey_authentication = 1;
1.25 markus 242: if (options->kerberos_authentication == -1)
1.107 markus 243: options->kerberos_authentication = 0;
1.25 markus 244: if (options->kerberos_or_local_passwd == -1)
245: options->kerberos_or_local_passwd = 1;
246: if (options->kerberos_ticket_cleanup == -1)
247: options->kerberos_ticket_cleanup = 1;
1.130 jakob 248: if (options->kerberos_get_afs_token == -1)
249: options->kerberos_get_afs_token = 0;
1.125 markus 250: if (options->gss_authentication == -1)
251: options->gss_authentication = 0;
252: if (options->gss_cleanup_creds == -1)
253: options->gss_cleanup_creds = 1;
1.271 djm 254: if (options->gss_strict_acceptor == -1)
255: options->gss_strict_acceptor = 0;
1.25 markus 256: if (options->password_authentication == -1)
257: options->password_authentication = 1;
1.52 markus 258: if (options->kbd_interactive_authentication == -1)
259: options->kbd_interactive_authentication = 0;
1.80 markus 260: if (options->challenge_response_authentication == -1)
261: options->challenge_response_authentication = 1;
1.25 markus 262: if (options->permit_empty_passwd == -1)
1.30 markus 263: options->permit_empty_passwd = 0;
1.113 markus 264: if (options->permit_user_env == -1)
265: options->permit_user_env = 0;
1.111 markus 266: if (options->compression == -1)
1.143 markus 267: options->compression = COMP_DELAYED;
1.235 dtucker 268: if (options->rekey_limit == -1)
269: options->rekey_limit = 0;
270: if (options->rekey_interval == -1)
271: options->rekey_interval = 0;
1.53 markus 272: if (options->allow_tcp_forwarding == -1)
1.233 djm 273: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.251 millert 274: if (options->allow_streamlocal_forwarding == -1)
275: options->allow_streamlocal_forwarding = FORWARD_ALLOW;
1.178 pyr 276: if (options->allow_agent_forwarding == -1)
277: options->allow_agent_forwarding = 1;
1.251 millert 278: if (options->fwd_opts.gateway_ports == -1)
279: options->fwd_opts.gateway_ports = 0;
1.46 markus 280: if (options->max_startups == -1)
1.234 dtucker 281: options->max_startups = 100;
1.50 markus 282: if (options->max_startups_rate == -1)
1.234 dtucker 283: options->max_startups_rate = 30; /* 30% */
1.50 markus 284: if (options->max_startups_begin == -1)
1.234 dtucker 285: options->max_startups_begin = 10;
1.133 dtucker 286: if (options->max_authtries == -1)
287: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 288: if (options->max_sessions == -1)
289: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 290: if (options->use_dns == -1)
1.260 deraadt 291: options->use_dns = 0;
1.77 beck 292: if (options->client_alive_interval == -1)
1.95 deraadt 293: options->client_alive_interval = 0;
1.77 beck 294: if (options->client_alive_count_max == -1)
295: options->client_alive_count_max = 3;
1.219 djm 296: if (options->num_authkeys_files == 0) {
297: options->authorized_keys_files[options->num_authkeys_files++] =
298: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS);
299: options->authorized_keys_files[options->num_authkeys_files++] =
300: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS2);
301: }
1.145 reyk 302: if (options->permit_tun == -1)
1.146 reyk 303: options->permit_tun = SSH_TUNMODE_NO;
1.213 djm 304: if (options->ip_qos_interactive == -1)
305: options->ip_qos_interactive = IPTOS_LOWDELAY;
306: if (options->ip_qos_bulk == -1)
307: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 308: if (options->version_addendum == NULL)
309: options->version_addendum = xstrdup("");
1.251 millert 310: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
311: options->fwd_opts.streamlocal_bind_mask = 0177;
312: if (options->fwd_opts.streamlocal_bind_unlink == -1)
313: options->fwd_opts.streamlocal_bind_unlink = 0;
1.256 djm 314: if (options->fingerprint_hash == -1)
315: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.277 djm 316:
1.282 djm 317: assemble_algorithms(options);
1.277 djm 318:
1.285 djm 319: /* Turn privilege separation and sandboxing on by default */
1.102 provos 320: if (use_privsep == -1)
1.285 djm 321: use_privsep = PRIVSEP_ON;
1.257 djm 322:
323: #define CLEAR_ON_NONE(v) \
324: do { \
325: if (option_clear_or_none(v)) { \
326: free(v); \
327: v = NULL; \
328: } \
329: } while(0)
330: CLEAR_ON_NONE(options->pid_file);
331: CLEAR_ON_NONE(options->xauth_location);
332: CLEAR_ON_NONE(options->banner);
333: CLEAR_ON_NONE(options->trusted_user_ca_keys);
334: CLEAR_ON_NONE(options->revoked_keys_file);
1.267 djm 335: CLEAR_ON_NONE(options->authorized_principals_file);
1.283 djm 336: CLEAR_ON_NONE(options->adm_forced_command);
337: CLEAR_ON_NONE(options->chroot_directory);
1.257 djm 338: for (i = 0; i < options->num_host_key_files; i++)
339: CLEAR_ON_NONE(options->host_key_files[i]);
340: for (i = 0; i < options->num_host_cert_files; i++)
341: CLEAR_ON_NONE(options->host_cert_files[i]);
342: #undef CLEAR_ON_NONE
1.291 djm 343:
344: /* Similar handling for AuthenticationMethods=any */
345: if (options->num_auth_methods == 1 &&
346: strcmp(options->auth_methods[0], "any") == 0) {
347: free(options->auth_methods[0]);
348: options->auth_methods[0] = NULL;
349: options->num_auth_methods = 0;
350: }
351:
1.1 deraadt 352: }
353:
354: /* Keyword tokens. */
1.25 markus 355: typedef enum {
356: sBadOption, /* == unknown option */
1.293 naddy 357: sPort, sHostKeyFile, sLoginGraceTime,
358: sPermitRootLogin, sLogFacility, sLogLevel,
1.25 markus 359: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 360: sKerberosGetAFSToken,
1.123 markus 361: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 362: sPasswordAuthentication, sKbdInteractiveAuthentication,
363: sListenAddress, sAddressFamily,
1.72 stevesk 364: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 365: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 366: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.294 djm 367: sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
1.235 dtucker 368: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.293 naddy 369: sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile,
1.258 djm 370: sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes,
371: sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 372: sBanner, sUseDNS, sHostbasedAuthentication,
1.258 djm 373: sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
1.276 markus 374: sHostKeyAlgorithms,
1.258 djm 375: sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
1.271 djm 376: sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
377: sAcceptEnv, sPermitTunnel,
1.176 djm 378: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 379: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.249 djm 380: sHostCertificate,
1.208 djm 381: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.270 djm 382: sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
1.225 djm 383: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 384: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.250 djm 385: sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
1.251 millert 386: sStreamLocalBindMask, sStreamLocalBindUnlink,
1.256 djm 387: sAllowStreamLocalForwarding, sFingerprintHash,
1.295 djm 388: sDeprecated, sIgnore, sUnsupported
1.1 deraadt 389: } ServerOpCodes;
390:
1.153 dtucker 391: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
392: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
393: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
394:
1.1 deraadt 395: /* Textual representation of the tokens. */
1.25 markus 396: static struct {
397: const char *name;
398: ServerOpCodes opcode;
1.153 dtucker 399: u_int flags;
1.25 markus 400: } keywords[] = {
1.153 dtucker 401: { "port", sPort, SSHCFG_GLOBAL },
402: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
403: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 404: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 405: { "pidfile", sPidFile, SSHCFG_GLOBAL },
1.293 naddy 406: { "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 407: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
1.293 naddy 408: { "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
1.175 dtucker 409: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 410: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
411: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
412: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.293 naddy 413: { "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 414: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 415: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.258 djm 416: { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL },
1.276 markus 417: { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
1.293 naddy 418: { "rsaauthentication", sDeprecated, SSHCFG_ALL },
1.168 dtucker 419: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.258 djm 420: { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL },
1.153 dtucker 421: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 422: #ifdef KRB5
1.168 dtucker 423: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 424: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
425: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
426: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 427: #else
1.168 dtucker 428: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 429: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
430: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
431: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 432: #endif
1.153 dtucker 433: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
434: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 435: #ifdef GSSAPI
1.168 dtucker 436: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 437: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.271 djm 438: { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
1.125 markus 439: #else
1.168 dtucker 440: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 441: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.271 djm 442: { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 443: #endif
1.168 dtucker 444: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
445: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 446: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 447: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
448: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
449: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
450: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
451: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
452: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
453: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
454: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 455: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
456: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
457: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 458: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
459: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 460: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 461: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
1.294 djm 462: { "uselogin", sDeprecated, SSHCFG_GLOBAL },
1.153 dtucker 463: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 464: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 465: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
466: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
467: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 468: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 469: { "allowusers", sAllowUsers, SSHCFG_ALL },
470: { "denyusers", sDenyUsers, SSHCFG_ALL },
471: { "allowgroups", sAllowGroups, SSHCFG_ALL },
472: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 473: { "ciphers", sCiphers, SSHCFG_GLOBAL },
474: { "macs", sMacs, SSHCFG_GLOBAL },
1.295 djm 475: { "protocol", sIgnore, SSHCFG_GLOBAL },
1.153 dtucker 476: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
477: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
478: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 479: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 480: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 481: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 482: { "usedns", sUseDNS, SSHCFG_GLOBAL },
483: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
484: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
485: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
486: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
1.209 djm 487: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 488: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.153 dtucker 489: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
1.227 markus 490: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 491: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 492: { "permittty", sPermitTTY, SSHCFG_ALL },
1.250 djm 493: { "permituserrc", sPermitUserRC, SSHCFG_ALL },
1.153 dtucker 494: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 495: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 496: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 497: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 498: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 499: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
500: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 501: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 502: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 503: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 504: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
505: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.270 djm 506: { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
507: { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
1.225 djm 508: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 509: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.251 millert 510: { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
511: { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
512: { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
1.256 djm 513: { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
1.153 dtucker 514: { NULL, sBadOption, 0 }
1.1 deraadt 515: };
516:
1.182 dtucker 517: static struct {
518: int val;
519: char *text;
520: } tunmode_desc[] = {
521: { SSH_TUNMODE_NO, "no" },
522: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
523: { SSH_TUNMODE_ETHERNET, "ethernet" },
524: { SSH_TUNMODE_YES, "yes" },
525: { -1, NULL }
526: };
527:
1.27 markus 528: /*
1.73 stevesk 529: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 530: */
1.1 deraadt 531:
1.34 markus 532: static ServerOpCodes
1.25 markus 533: parse_token(const char *cp, const char *filename,
1.153 dtucker 534: int linenum, u_int *flags)
1.1 deraadt 535: {
1.55 markus 536: u_int i;
1.1 deraadt 537:
1.25 markus 538: for (i = 0; keywords[i].name; i++)
1.153 dtucker 539: if (strcasecmp(cp, keywords[i].name) == 0) {
540: *flags = keywords[i].flags;
1.25 markus 541: return keywords[i].opcode;
1.153 dtucker 542: }
1.25 markus 543:
1.78 stevesk 544: error("%s: line %d: Bad configuration option: %s",
545: filename, linenum, cp);
1.25 markus 546: return sBadOption;
1.1 deraadt 547: }
548:
1.202 djm 549: char *
550: derelativise_path(const char *path)
551: {
1.259 deraadt 552: char *expanded, *ret, cwd[PATH_MAX];
1.202 djm 553:
1.257 djm 554: if (strcasecmp(path, "none") == 0)
555: return xstrdup("none");
1.202 djm 556: expanded = tilde_expand_filename(path, getuid());
557: if (*expanded == '/')
558: return expanded;
1.207 djm 559: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 560: fatal("%s: getcwd: %s", __func__, strerror(errno));
561: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 562: free(expanded);
1.202 djm 563: return ret;
564: }
565:
1.84 itojun 566: static void
1.194 djm 567: add_listen_addr(ServerOptions *options, char *addr, int port)
1.74 stevesk 568: {
1.142 djm 569: u_int i;
1.74 stevesk 570:
1.76 stevesk 571: if (port == 0)
1.74 stevesk 572: for (i = 0; i < options->num_ports; i++)
573: add_one_listen_addr(options, addr, options->ports[i]);
574: else
1.76 stevesk 575: add_one_listen_addr(options, addr, port);
1.74 stevesk 576: }
577:
1.84 itojun 578: static void
1.194 djm 579: add_one_listen_addr(ServerOptions *options, char *addr, int port)
1.29 markus 580: {
581: struct addrinfo hints, *ai, *aitop;
582: char strport[NI_MAXSERV];
583: int gaierr;
584:
1.74 stevesk 585: memset(&hints, 0, sizeof(hints));
1.138 djm 586: hints.ai_family = options->address_family;
1.74 stevesk 587: hints.ai_socktype = SOCK_STREAM;
588: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 589: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 590: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
591: fatal("bad addr or host: %s (%s)",
592: addr ? addr : "<NULL>",
1.173 dtucker 593: ssh_gai_strerror(gaierr));
1.74 stevesk 594: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
595: ;
596: ai->ai_next = options->listen_addrs;
597: options->listen_addrs = aitop;
1.29 markus 598: }
599:
1.266 dtucker 600: /*
601: * Queue a ListenAddress to be processed once we have all of the Ports
602: * and AddressFamily options.
603: */
604: static void
605: queue_listen_addr(ServerOptions *options, char *addr, int port)
606: {
607: options->queued_listen_addrs = xreallocarray(
608: options->queued_listen_addrs, options->num_queued_listens + 1,
609: sizeof(addr));
610: options->queued_listen_ports = xreallocarray(
611: options->queued_listen_ports, options->num_queued_listens + 1,
612: sizeof(port));
613: options->queued_listen_addrs[options->num_queued_listens] =
614: xstrdup(addr);
615: options->queued_listen_ports[options->num_queued_listens] = port;
616: options->num_queued_listens++;
617: }
618:
619: /*
620: * Process queued (text) ListenAddress entries.
621: */
622: static void
623: process_queued_listen_addrs(ServerOptions *options)
624: {
625: u_int i;
626:
627: if (options->num_ports == 0)
628: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
629: if (options->address_family == -1)
630: options->address_family = AF_UNSPEC;
631:
632: for (i = 0; i < options->num_queued_listens; i++) {
633: add_listen_addr(options, options->queued_listen_addrs[i],
634: options->queued_listen_ports[i]);
635: free(options->queued_listen_addrs[i]);
636: options->queued_listen_addrs[i] = NULL;
637: }
638: free(options->queued_listen_addrs);
639: options->queued_listen_addrs = NULL;
640: free(options->queued_listen_ports);
641: options->queued_listen_ports = NULL;
642: options->num_queued_listens = 0;
643: }
644:
1.226 dtucker 645: struct connection_info *
646: get_connection_info(int populate, int use_dns)
647: {
1.286 djm 648: struct ssh *ssh = active_state; /* XXX */
1.226 dtucker 649: static struct connection_info ci;
650:
651: if (!populate)
652: return &ci;
1.286 djm 653: ci.host = auth_get_canonical_hostname(ssh, use_dns);
654: ci.address = ssh_remote_ipaddr(ssh);
655: ci.laddress = ssh_local_ipaddr(ssh);
656: ci.lport = ssh_local_port(ssh);
1.226 dtucker 657: return &ci;
658: }
659:
1.153 dtucker 660: /*
661: * The strategy for the Match blocks is that the config file is parsed twice.
662: *
663: * The first time is at startup. activep is initialized to 1 and the
664: * directives in the global context are processed and acted on. Hitting a
665: * Match directive unsets activep and the directives inside the block are
666: * checked for syntax only.
667: *
668: * The second time is after a connection has been established but before
669: * authentication. activep is initialized to 2 and global config directives
670: * are ignored since they have already been processed. If the criteria in a
671: * Match block is met, activep is set and the subsequent directives
672: * processed and actioned until EOF or another Match block unsets it. Any
673: * options set are copied into the main server config.
674: *
675: * Potential additions/improvements:
1.295 djm 676: * - Add Match support for pre-kex directives, eg. Ciphers.
1.153 dtucker 677: *
678: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
679: * Match Address 192.168.0.*
680: * Tag trusted
681: * Match Group wheel
682: * Tag trusted
683: * Match Tag trusted
684: * AllowTcpForwarding yes
685: * GatewayPorts clientspecified
686: * [...]
687: *
688: * - Add a PermittedChannelRequests directive
689: * Match Group shell
690: * PermittedChannelRequests session,forwarded-tcpip
691: */
692:
693: static int
1.165 dtucker 694: match_cfg_line_group(const char *grps, int line, const char *user)
695: {
696: int result = 0;
697: struct passwd *pw;
698:
699: if (user == NULL)
700: goto out;
701:
702: if ((pw = getpwnam(user)) == NULL) {
703: debug("Can't match group at line %d because user %.100s does "
704: "not exist", line, user);
705: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
706: debug("Can't Match group because user %.100s not in any group "
707: "at line %d", user, line);
1.186 djm 708: } else if (ga_match_pattern_list(grps) != 1) {
709: debug("user %.100s does not match group list %.100s at line %d",
710: user, grps, line);
1.165 dtucker 711: } else {
1.186 djm 712: debug("user %.100s matched group list %.100s at line %d", user,
713: grps, line);
1.165 dtucker 714: result = 1;
715: }
716: out:
717: ga_free();
718: return result;
719: }
720:
1.226 dtucker 721: /*
1.230 dtucker 722: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 723: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 724: * not match.
1.226 dtucker 725: */
1.165 dtucker 726: static int
1.226 dtucker 727: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 728: {
1.243 dtucker 729: int result = 1, attributes = 0, port;
1.153 dtucker 730: char *arg, *attrib, *cp = *condition;
731:
1.226 dtucker 732: if (ci == NULL)
1.153 dtucker 733: debug3("checking syntax for 'Match %s'", cp);
734: else
1.226 dtucker 735: debug3("checking match for '%s' user %s host %s addr %s "
736: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
737: ci->host ? ci->host : "(null)",
738: ci->address ? ci->address : "(null)",
739: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 740:
741: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 742: attributes++;
743: if (strcasecmp(attrib, "all") == 0) {
744: if (attributes != 1 ||
745: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
746: error("'all' cannot be combined with other "
747: "Match attributes");
748: return -1;
749: }
750: *condition = cp;
751: return 1;
752: }
1.153 dtucker 753: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
754: error("Missing Match criteria for %s", attrib);
755: return -1;
756: }
757: if (strcasecmp(attrib, "user") == 0) {
1.226 dtucker 758: if (ci == NULL || ci->user == NULL) {
1.153 dtucker 759: result = 0;
760: continue;
761: }
1.269 djm 762: if (match_pattern_list(ci->user, arg, 0) != 1)
1.153 dtucker 763: result = 0;
764: else
765: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 766: "line %d", ci->user, arg, line);
1.165 dtucker 767: } else if (strcasecmp(attrib, "group") == 0) {
1.226 dtucker 768: if (ci == NULL || ci->user == NULL) {
769: result = 0;
770: continue;
771: }
772: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 773: case -1:
774: return -1;
775: case 0:
776: result = 0;
777: }
1.153 dtucker 778: } else if (strcasecmp(attrib, "host") == 0) {
1.226 dtucker 779: if (ci == NULL || ci->host == NULL) {
1.153 dtucker 780: result = 0;
781: continue;
782: }
1.269 djm 783: if (match_hostname(ci->host, arg) != 1)
1.153 dtucker 784: result = 0;
785: else
786: debug("connection from %.100s matched 'Host "
1.226 dtucker 787: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 788: } else if (strcasecmp(attrib, "address") == 0) {
1.226 dtucker 789: if (ci == NULL || ci->address == NULL) {
790: result = 0;
791: continue;
792: }
793: switch (addr_match_list(ci->address, arg)) {
1.181 djm 794: case 1:
795: debug("connection from %.100s matched 'Address "
1.226 dtucker 796: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 797: break;
798: case 0:
1.183 djm 799: case -1:
1.153 dtucker 800: result = 0;
1.181 djm 801: break;
1.183 djm 802: case -2:
1.181 djm 803: return -1;
1.153 dtucker 804: }
1.226 dtucker 805: } else if (strcasecmp(attrib, "localaddress") == 0){
806: if (ci == NULL || ci->laddress == NULL) {
807: result = 0;
808: continue;
809: }
810: switch (addr_match_list(ci->laddress, arg)) {
811: case 1:
812: debug("connection from %.100s matched "
813: "'LocalAddress %.100s' at line %d",
814: ci->laddress, arg, line);
815: break;
816: case 0:
817: case -1:
818: result = 0;
819: break;
820: case -2:
821: return -1;
822: }
823: } else if (strcasecmp(attrib, "localport") == 0) {
824: if ((port = a2port(arg)) == -1) {
825: error("Invalid LocalPort '%s' on Match line",
826: arg);
827: return -1;
828: }
829: if (ci == NULL || ci->lport == 0) {
830: result = 0;
831: continue;
832: }
833: /* TODO support port lists */
834: if (port == ci->lport)
835: debug("connection from %.100s matched "
836: "'LocalPort %d' at line %d",
837: ci->laddress, port, line);
838: else
839: result = 0;
1.153 dtucker 840: } else {
841: error("Unsupported Match attribute %s", attrib);
842: return -1;
843: }
1.243 dtucker 844: }
845: if (attributes == 0) {
846: error("One or more attributes required for Match");
847: return -1;
1.153 dtucker 848: }
1.226 dtucker 849: if (ci != NULL)
1.153 dtucker 850: debug3("match %sfound", result ? "" : "not ");
851: *condition = cp;
852: return result;
853: }
854:
1.158 dtucker 855: #define WHITESPACE " \t\r\n"
856:
1.220 djm 857: /* Multistate option parsing */
858: struct multistate {
859: char *key;
860: int value;
861: };
862: static const struct multistate multistate_addressfamily[] = {
863: { "inet", AF_INET },
864: { "inet6", AF_INET6 },
865: { "any", AF_UNSPEC },
866: { NULL, -1 }
867: };
868: static const struct multistate multistate_permitrootlogin[] = {
869: { "without-password", PERMIT_NO_PASSWD },
1.280 deraadt 870: { "prohibit-password", PERMIT_NO_PASSWD },
1.220 djm 871: { "forced-commands-only", PERMIT_FORCED_ONLY },
872: { "yes", PERMIT_YES },
873: { "no", PERMIT_NO },
874: { NULL, -1 }
875: };
876: static const struct multistate multistate_compression[] = {
1.297 ! djm 877: { "yes", COMP_DELAYED },
1.220 djm 878: { "delayed", COMP_DELAYED },
879: { "no", COMP_NONE },
880: { NULL, -1 }
881: };
882: static const struct multistate multistate_gatewayports[] = {
883: { "clientspecified", 2 },
884: { "yes", 1 },
885: { "no", 0 },
886: { NULL, -1 }
887: };
1.222 djm 888: static const struct multistate multistate_privsep[] = {
1.228 djm 889: { "yes", PRIVSEP_NOSANDBOX },
890: { "sandbox", PRIVSEP_ON },
891: { "nosandbox", PRIVSEP_NOSANDBOX },
1.222 djm 892: { "no", PRIVSEP_OFF },
893: { NULL, -1 }
894: };
1.233 djm 895: static const struct multistate multistate_tcpfwd[] = {
896: { "yes", FORWARD_ALLOW },
897: { "all", FORWARD_ALLOW },
898: { "no", FORWARD_DENY },
899: { "remote", FORWARD_REMOTE },
900: { "local", FORWARD_LOCAL },
901: { NULL, -1 }
902: };
1.220 djm 903:
1.94 markus 904: int
905: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 906: const char *filename, int linenum, int *activep,
907: struct connection_info *connectinfo)
1.1 deraadt 908: {
1.238 dtucker 909: char *cp, **charptr, *arg, *p;
1.237 dtucker 910: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 911: SyslogFacility *log_facility_ptr;
912: LogLevel *log_level_ptr;
1.25 markus 913: ServerOpCodes opcode;
1.153 dtucker 914: u_int i, flags = 0;
1.151 djm 915: size_t len;
1.237 dtucker 916: long long val64;
1.220 djm 917: const struct multistate *multistate_ptr;
1.25 markus 918:
1.94 markus 919: cp = line;
1.148 dtucker 920: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 921: return 0;
1.94 markus 922: /* Ignore leading whitespace */
923: if (*arg == '\0')
924: arg = strdelim(&cp);
925: if (!arg || !*arg || *arg == '#')
926: return 0;
927: intptr = NULL;
928: charptr = NULL;
1.153 dtucker 929: opcode = parse_token(arg, filename, linenum, &flags);
930:
931: if (activep == NULL) { /* We are processing a command line directive */
932: cmdline = 1;
933: activep = &cmdline;
934: }
935: if (*activep && opcode != sMatch)
936: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
937: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 938: if (connectinfo == NULL) {
1.153 dtucker 939: fatal("%s line %d: Directive '%s' is not allowed "
940: "within a Match block", filename, linenum, arg);
941: } else { /* this is a directive we have already processed */
942: while (arg)
943: arg = strdelim(&cp);
944: return 0;
945: }
946: }
947:
1.94 markus 948: switch (opcode) {
949: case sBadOption:
950: return -1;
951: case sPort:
952: /* ignore ports from configfile if cmdline specifies ports */
953: if (options->ports_from_cmdline)
954: return 0;
955: if (options->num_ports >= MAX_PORTS)
956: fatal("%s line %d: too many ports.",
957: filename, linenum);
1.48 provos 958: arg = strdelim(&cp);
1.94 markus 959: if (!arg || *arg == '\0')
960: fatal("%s line %d: missing port number.",
961: filename, linenum);
962: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 963: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 964: fatal("%s line %d: Badly formatted port number.",
965: filename, linenum);
966: break;
1.29 markus 967:
1.94 markus 968: case sLoginGraceTime:
969: intptr = &options->login_grace_time;
1.180 djm 970: parse_time:
1.94 markus 971: arg = strdelim(&cp);
972: if (!arg || *arg == '\0')
973: fatal("%s line %d: missing time value.",
974: filename, linenum);
975: if ((value = convtime(arg)) == -1)
976: fatal("%s line %d: invalid time value.",
977: filename, linenum);
1.268 djm 978: if (*activep && *intptr == -1)
1.94 markus 979: *intptr = value;
980: break;
981:
982: case sListenAddress:
983: arg = strdelim(&cp);
1.139 djm 984: if (arg == NULL || *arg == '\0')
985: fatal("%s line %d: missing address",
1.94 markus 986: filename, linenum);
1.144 dtucker 987: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
988: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
989: && strchr(p+1, ':') != NULL) {
1.266 dtucker 990: queue_listen_addr(options, arg, 0);
1.144 dtucker 991: break;
992: }
1.139 djm 993: p = hpdelim(&arg);
994: if (p == NULL)
995: fatal("%s line %d: bad address:port usage",
996: filename, linenum);
997: p = cleanhostname(p);
998: if (arg == NULL)
999: port = 0;
1.194 djm 1000: else if ((port = a2port(arg)) <= 0)
1.139 djm 1001: fatal("%s line %d: bad port number", filename, linenum);
1002:
1.266 dtucker 1003: queue_listen_addr(options, p, port);
1.25 markus 1004:
1.138 djm 1005: break;
1006:
1007: case sAddressFamily:
1.220 djm 1008: intptr = &options->address_family;
1009: multistate_ptr = multistate_addressfamily;
1010: parse_multistate:
1.138 djm 1011: arg = strdelim(&cp);
1.141 markus 1012: if (!arg || *arg == '\0')
1.220 djm 1013: fatal("%s line %d: missing argument.",
1.141 markus 1014: filename, linenum);
1.220 djm 1015: value = -1;
1016: for (i = 0; multistate_ptr[i].key != NULL; i++) {
1017: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
1018: value = multistate_ptr[i].value;
1019: break;
1020: }
1021: }
1022: if (value == -1)
1023: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 1024: filename, linenum, arg);
1.220 djm 1025: if (*activep && *intptr == -1)
1.138 djm 1026: *intptr = value;
1.94 markus 1027: break;
1028:
1029: case sHostKeyFile:
1030: intptr = &options->num_host_key_files;
1031: if (*intptr >= MAX_HOSTKEYS)
1032: fatal("%s line %d: too many host keys specified (max %d).",
1033: filename, linenum, MAX_HOSTKEYS);
1034: charptr = &options->host_key_files[*intptr];
1.180 djm 1035: parse_filename:
1.94 markus 1036: arg = strdelim(&cp);
1037: if (!arg || *arg == '\0')
1038: fatal("%s line %d: missing file name.",
1039: filename, linenum);
1.153 dtucker 1040: if (*activep && *charptr == NULL) {
1.202 djm 1041: *charptr = derelativise_path(arg);
1.94 markus 1042: /* increase optional counter */
1043: if (intptr != NULL)
1044: *intptr = *intptr + 1;
1045: }
1046: break;
1.76 stevesk 1047:
1.240 markus 1048: case sHostKeyAgent:
1049: charptr = &options->host_key_agent;
1050: arg = strdelim(&cp);
1051: if (!arg || *arg == '\0')
1052: fatal("%s line %d: missing socket name.",
1053: filename, linenum);
1054: if (*activep && *charptr == NULL)
1055: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
1056: xstrdup(arg) : derelativise_path(arg);
1057: break;
1058:
1.203 djm 1059: case sHostCertificate:
1060: intptr = &options->num_host_cert_files;
1061: if (*intptr >= MAX_HOSTKEYS)
1062: fatal("%s line %d: too many host certificates "
1063: "specified (max %d).", filename, linenum,
1064: MAX_HOSTCERTS);
1065: charptr = &options->host_cert_files[*intptr];
1066: goto parse_filename;
1067: break;
1068:
1.94 markus 1069: case sPidFile:
1070: charptr = &options->pid_file;
1071: goto parse_filename;
1.25 markus 1072:
1.94 markus 1073: case sPermitRootLogin:
1074: intptr = &options->permit_root_login;
1.220 djm 1075: multistate_ptr = multistate_permitrootlogin;
1076: goto parse_multistate;
1.36 markus 1077:
1.94 markus 1078: case sIgnoreRhosts:
1079: intptr = &options->ignore_rhosts;
1.180 djm 1080: parse_flag:
1.94 markus 1081: arg = strdelim(&cp);
1082: if (!arg || *arg == '\0')
1083: fatal("%s line %d: missing yes/no argument.",
1084: filename, linenum);
1085: value = 0; /* silence compiler */
1086: if (strcmp(arg, "yes") == 0)
1087: value = 1;
1088: else if (strcmp(arg, "no") == 0)
1089: value = 0;
1090: else
1091: fatal("%s line %d: Bad yes/no argument: %s",
1092: filename, linenum, arg);
1.153 dtucker 1093: if (*activep && *intptr == -1)
1.94 markus 1094: *intptr = value;
1095: break;
1096:
1097: case sIgnoreUserKnownHosts:
1098: intptr = &options->ignore_user_known_hosts;
1099: goto parse_flag;
1100:
1101: case sHostbasedAuthentication:
1102: intptr = &options->hostbased_authentication;
1103: goto parse_flag;
1104:
1105: case sHostbasedUsesNameFromPacketOnly:
1106: intptr = &options->hostbased_uses_name_from_packet_only;
1107: goto parse_flag;
1108:
1.258 djm 1109: case sHostbasedAcceptedKeyTypes:
1110: charptr = &options->hostbased_key_types;
1111: parse_keytypes:
1112: arg = strdelim(&cp);
1113: if (!arg || *arg == '\0')
1114: fatal("%s line %d: Missing argument.",
1115: filename, linenum);
1.277 djm 1116: if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.258 djm 1117: fatal("%s line %d: Bad key types '%s'.",
1118: filename, linenum, arg ? arg : "<NONE>");
1119: if (*activep && *charptr == NULL)
1120: *charptr = xstrdup(arg);
1121: break;
1122:
1.276 markus 1123: case sHostKeyAlgorithms:
1124: charptr = &options->hostkeyalgorithms;
1125: goto parse_keytypes;
1126:
1.94 markus 1127: case sPubkeyAuthentication:
1128: intptr = &options->pubkey_authentication;
1129: goto parse_flag;
1.119 jakob 1130:
1.258 djm 1131: case sPubkeyAcceptedKeyTypes:
1132: charptr = &options->pubkey_key_types;
1133: goto parse_keytypes;
1134:
1.94 markus 1135: case sKerberosAuthentication:
1136: intptr = &options->kerberos_authentication;
1137: goto parse_flag;
1138:
1139: case sKerberosOrLocalPasswd:
1140: intptr = &options->kerberos_or_local_passwd;
1141: goto parse_flag;
1142:
1143: case sKerberosTicketCleanup:
1144: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1145: goto parse_flag;
1146:
1147: case sKerberosGetAFSToken:
1148: intptr = &options->kerberos_get_afs_token;
1.125 markus 1149: goto parse_flag;
1150:
1151: case sGssAuthentication:
1152: intptr = &options->gss_authentication;
1153: goto parse_flag;
1154:
1155: case sGssCleanupCreds:
1156: intptr = &options->gss_cleanup_creds;
1.271 djm 1157: goto parse_flag;
1158:
1159: case sGssStrictAcceptor:
1160: intptr = &options->gss_strict_acceptor;
1.94 markus 1161: goto parse_flag;
1162:
1163: case sPasswordAuthentication:
1164: intptr = &options->password_authentication;
1165: goto parse_flag;
1166:
1167: case sKbdInteractiveAuthentication:
1168: intptr = &options->kbd_interactive_authentication;
1169: goto parse_flag;
1170:
1171: case sChallengeResponseAuthentication:
1172: intptr = &options->challenge_response_authentication;
1173: goto parse_flag;
1174:
1175: case sPrintMotd:
1176: intptr = &options->print_motd;
1177: goto parse_flag;
1178:
1179: case sPrintLastLog:
1180: intptr = &options->print_lastlog;
1181: goto parse_flag;
1182:
1183: case sX11Forwarding:
1184: intptr = &options->x11_forwarding;
1185: goto parse_flag;
1186:
1187: case sX11DisplayOffset:
1188: intptr = &options->x11_display_offset;
1.293 naddy 1189: parse_int:
1190: arg = strdelim(&cp);
1191: if (!arg || *arg == '\0')
1192: fatal("%s line %d: missing integer value.",
1193: filename, linenum);
1194: value = atoi(arg);
1195: if (*activep && *intptr == -1)
1196: *intptr = value;
1197: break;
1.99 stevesk 1198:
1199: case sX11UseLocalhost:
1200: intptr = &options->x11_use_localhost;
1201: goto parse_flag;
1.94 markus 1202:
1203: case sXAuthLocation:
1204: charptr = &options->xauth_location;
1205: goto parse_filename;
1206:
1.244 djm 1207: case sPermitTTY:
1208: intptr = &options->permit_tty;
1209: goto parse_flag;
1210:
1.250 djm 1211: case sPermitUserRC:
1212: intptr = &options->permit_user_rc;
1213: goto parse_flag;
1214:
1.94 markus 1215: case sStrictModes:
1216: intptr = &options->strict_modes;
1217: goto parse_flag;
1218:
1.129 markus 1219: case sTCPKeepAlive:
1220: intptr = &options->tcp_keep_alive;
1.94 markus 1221: goto parse_flag;
1222:
1223: case sEmptyPasswd:
1224: intptr = &options->permit_empty_passwd;
1.113 markus 1225: goto parse_flag;
1226:
1227: case sPermitUserEnvironment:
1228: intptr = &options->permit_user_env;
1.94 markus 1229: goto parse_flag;
1230:
1.111 markus 1231: case sCompression:
1232: intptr = &options->compression;
1.220 djm 1233: multistate_ptr = multistate_compression;
1234: goto parse_multistate;
1.94 markus 1235:
1.235 dtucker 1236: case sRekeyLimit:
1237: arg = strdelim(&cp);
1238: if (!arg || *arg == '\0')
1239: fatal("%.200s line %d: Missing argument.", filename,
1240: linenum);
1241: if (strcmp(arg, "default") == 0) {
1242: val64 = 0;
1243: } else {
1.236 dtucker 1244: if (scan_scaled(arg, &val64) == -1)
1245: fatal("%.200s line %d: Bad number '%s': %s",
1246: filename, linenum, arg, strerror(errno));
1.235 dtucker 1247: if (val64 != 0 && val64 < 16)
1248: fatal("%.200s line %d: RekeyLimit too small",
1249: filename, linenum);
1250: }
1251: if (*activep && options->rekey_limit == -1)
1.284 dtucker 1252: options->rekey_limit = val64;
1.235 dtucker 1253: if (cp != NULL) { /* optional rekey interval present */
1254: if (strcmp(cp, "none") == 0) {
1255: (void)strdelim(&cp); /* discard */
1256: break;
1257: }
1258: intptr = &options->rekey_interval;
1259: goto parse_time;
1260: }
1261: break;
1262:
1.94 markus 1263: case sGatewayPorts:
1.251 millert 1264: intptr = &options->fwd_opts.gateway_ports;
1.220 djm 1265: multistate_ptr = multistate_gatewayports;
1266: goto parse_multistate;
1.25 markus 1267:
1.122 markus 1268: case sUseDNS:
1269: intptr = &options->use_dns;
1.94 markus 1270: goto parse_flag;
1.53 markus 1271:
1.94 markus 1272: case sLogFacility:
1.174 dtucker 1273: log_facility_ptr = &options->log_facility;
1.94 markus 1274: arg = strdelim(&cp);
1275: value = log_facility_number(arg);
1.101 markus 1276: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1277: fatal("%.200s line %d: unsupported log facility '%s'",
1278: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1279: if (*log_facility_ptr == -1)
1280: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1281: break;
1.25 markus 1282:
1.94 markus 1283: case sLogLevel:
1.174 dtucker 1284: log_level_ptr = &options->log_level;
1.94 markus 1285: arg = strdelim(&cp);
1286: value = log_level_number(arg);
1.101 markus 1287: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1288: fatal("%.200s line %d: unsupported log level '%s'",
1289: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1290: if (*log_level_ptr == -1)
1291: *log_level_ptr = (LogLevel) value;
1.94 markus 1292: break;
1293:
1294: case sAllowTcpForwarding:
1295: intptr = &options->allow_tcp_forwarding;
1.233 djm 1296: multistate_ptr = multistate_tcpfwd;
1297: goto parse_multistate;
1.102 provos 1298:
1.251 millert 1299: case sAllowStreamLocalForwarding:
1300: intptr = &options->allow_streamlocal_forwarding;
1301: multistate_ptr = multistate_tcpfwd;
1302: goto parse_multistate;
1303:
1.178 pyr 1304: case sAllowAgentForwarding:
1305: intptr = &options->allow_agent_forwarding;
1306: goto parse_flag;
1307:
1.102 provos 1308: case sUsePrivilegeSeparation:
1309: intptr = &use_privsep;
1.222 djm 1310: multistate_ptr = multistate_privsep;
1311: goto parse_multistate;
1.94 markus 1312:
1313: case sAllowUsers:
1314: while ((arg = strdelim(&cp)) && *arg != '\0') {
1315: if (options->num_allow_users >= MAX_ALLOW_USERS)
1316: fatal("%s line %d: too many allow users.",
1317: filename, linenum);
1.227 markus 1318: if (!*activep)
1319: continue;
1.112 deraadt 1320: options->allow_users[options->num_allow_users++] =
1321: xstrdup(arg);
1.94 markus 1322: }
1323: break;
1.25 markus 1324:
1.94 markus 1325: case sDenyUsers:
1326: while ((arg = strdelim(&cp)) && *arg != '\0') {
1327: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 stevesk 1328: fatal("%s line %d: too many deny users.",
1.94 markus 1329: filename, linenum);
1.227 markus 1330: if (!*activep)
1331: continue;
1.112 deraadt 1332: options->deny_users[options->num_deny_users++] =
1333: xstrdup(arg);
1.94 markus 1334: }
1335: break;
1.25 markus 1336:
1.94 markus 1337: case sAllowGroups:
1338: while ((arg = strdelim(&cp)) && *arg != '\0') {
1339: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1340: fatal("%s line %d: too many allow groups.",
1341: filename, linenum);
1.227 markus 1342: if (!*activep)
1343: continue;
1.112 deraadt 1344: options->allow_groups[options->num_allow_groups++] =
1345: xstrdup(arg);
1.94 markus 1346: }
1347: break;
1.33 markus 1348:
1.94 markus 1349: case sDenyGroups:
1350: while ((arg = strdelim(&cp)) && *arg != '\0') {
1351: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1352: fatal("%s line %d: too many deny groups.",
1353: filename, linenum);
1.227 markus 1354: if (!*activep)
1355: continue;
1356: options->deny_groups[options->num_deny_groups++] =
1357: xstrdup(arg);
1.94 markus 1358: }
1359: break;
1.66 markus 1360:
1.94 markus 1361: case sCiphers:
1362: arg = strdelim(&cp);
1363: if (!arg || *arg == '\0')
1364: fatal("%s line %d: Missing argument.", filename, linenum);
1.277 djm 1365: if (!ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1366: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1367: filename, linenum, arg ? arg : "<NONE>");
1368: if (options->ciphers == NULL)
1369: options->ciphers = xstrdup(arg);
1370: break;
1.33 markus 1371:
1.94 markus 1372: case sMacs:
1373: arg = strdelim(&cp);
1374: if (!arg || *arg == '\0')
1375: fatal("%s line %d: Missing argument.", filename, linenum);
1.277 djm 1376: if (!mac_valid(*arg == '+' ? arg + 1 : arg))
1.94 markus 1377: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1378: filename, linenum, arg ? arg : "<NONE>");
1379: if (options->macs == NULL)
1380: options->macs = xstrdup(arg);
1.211 djm 1381: break;
1382:
1383: case sKexAlgorithms:
1384: arg = strdelim(&cp);
1385: if (!arg || *arg == '\0')
1386: fatal("%s line %d: Missing argument.",
1387: filename, linenum);
1.277 djm 1388: if (!kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.211 djm 1389: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1390: filename, linenum, arg ? arg : "<NONE>");
1391: if (options->kex_algorithms == NULL)
1392: options->kex_algorithms = xstrdup(arg);
1.94 markus 1393: break;
1.43 jakob 1394:
1.94 markus 1395: case sSubsystem:
1396: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1397: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1398: filename, linenum);
1.94 markus 1399: }
1400: arg = strdelim(&cp);
1401: if (!arg || *arg == '\0')
1402: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1403: filename, linenum);
1.153 dtucker 1404: if (!*activep) {
1405: arg = strdelim(&cp);
1406: break;
1407: }
1.94 markus 1408: for (i = 0; i < options->num_subsystems; i++)
1409: if (strcmp(arg, options->subsystem_name[i]) == 0)
1410: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1411: filename, linenum, arg);
1.94 markus 1412: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1413: arg = strdelim(&cp);
1414: if (!arg || *arg == '\0')
1415: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1416: filename, linenum);
1.94 markus 1417: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1418:
1419: /* Collect arguments (separate to executable) */
1420: p = xstrdup(arg);
1421: len = strlen(p) + 1;
1422: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1423: len += 1 + strlen(arg);
1.264 deraadt 1424: p = xreallocarray(p, 1, len);
1.151 djm 1425: strlcat(p, " ", len);
1426: strlcat(p, arg, len);
1427: }
1428: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1429: options->num_subsystems++;
1430: break;
1.46 markus 1431:
1.94 markus 1432: case sMaxStartups:
1433: arg = strdelim(&cp);
1434: if (!arg || *arg == '\0')
1435: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1436: filename, linenum);
1.94 markus 1437: if ((n = sscanf(arg, "%d:%d:%d",
1438: &options->max_startups_begin,
1439: &options->max_startups_rate,
1440: &options->max_startups)) == 3) {
1441: if (options->max_startups_begin >
1442: options->max_startups ||
1443: options->max_startups_rate > 100 ||
1444: options->max_startups_rate < 1)
1.50 markus 1445: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1446: filename, linenum);
1.94 markus 1447: } else if (n != 1)
1448: fatal("%s line %d: Illegal MaxStartups spec.",
1449: filename, linenum);
1450: else
1451: options->max_startups = options->max_startups_begin;
1452: break;
1.133 dtucker 1453:
1454: case sMaxAuthTries:
1455: intptr = &options->max_authtries;
1456: goto parse_int;
1.94 markus 1457:
1.180 djm 1458: case sMaxSessions:
1459: intptr = &options->max_sessions;
1460: goto parse_int;
1461:
1.94 markus 1462: case sBanner:
1463: charptr = &options->banner;
1464: goto parse_filename;
1.176 djm 1465:
1.94 markus 1466: /*
1467: * These options can contain %X options expanded at
1468: * connect time, so that you can specify paths like:
1469: *
1470: * AuthorizedKeysFile /etc/ssh_keys/%u
1471: */
1472: case sAuthorizedKeysFile:
1.219 djm 1473: if (*activep && options->num_authkeys_files == 0) {
1474: while ((arg = strdelim(&cp)) && *arg != '\0') {
1475: if (options->num_authkeys_files >=
1476: MAX_AUTHKEYS_FILES)
1477: fatal("%s line %d: "
1478: "too many authorized keys files.",
1479: filename, linenum);
1480: options->authorized_keys_files[
1481: options->num_authkeys_files++] =
1482: tilde_expand_filename(arg, getuid());
1483: }
1484: }
1485: return 0;
1486:
1.208 djm 1487: case sAuthorizedPrincipalsFile:
1488: charptr = &options->authorized_principals_file;
1.205 djm 1489: arg = strdelim(&cp);
1490: if (!arg || *arg == '\0')
1491: fatal("%s line %d: missing file name.",
1492: filename, linenum);
1493: if (*activep && *charptr == NULL) {
1.206 markus 1494: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1495: /* increase optional counter */
1496: if (intptr != NULL)
1497: *intptr = *intptr + 1;
1498: }
1499: break;
1.94 markus 1500:
1501: case sClientAliveInterval:
1502: intptr = &options->client_alive_interval;
1503: goto parse_time;
1504:
1505: case sClientAliveCountMax:
1506: intptr = &options->client_alive_count_max;
1507: goto parse_int;
1.131 djm 1508:
1509: case sAcceptEnv:
1510: while ((arg = strdelim(&cp)) && *arg != '\0') {
1511: if (strchr(arg, '=') != NULL)
1512: fatal("%s line %d: Invalid environment name.",
1513: filename, linenum);
1514: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1515: fatal("%s line %d: too many allow env.",
1516: filename, linenum);
1.153 dtucker 1517: if (!*activep)
1.227 markus 1518: continue;
1.131 djm 1519: options->accept_env[options->num_accept_env++] =
1520: xstrdup(arg);
1521: }
1522: break;
1.145 reyk 1523:
1524: case sPermitTunnel:
1525: intptr = &options->permit_tun;
1.146 reyk 1526: arg = strdelim(&cp);
1527: if (!arg || *arg == '\0')
1528: fatal("%s line %d: Missing yes/point-to-point/"
1529: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1530: value = -1;
1531: for (i = 0; tunmode_desc[i].val != -1; i++)
1532: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1533: value = tunmode_desc[i].val;
1534: break;
1535: }
1536: if (value == -1)
1.146 reyk 1537: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1538: "no argument: %s", filename, linenum, arg);
1.268 djm 1539: if (*activep && *intptr == -1)
1.146 reyk 1540: *intptr = value;
1541: break;
1.94 markus 1542:
1.153 dtucker 1543: case sMatch:
1544: if (cmdline)
1545: fatal("Match directive not supported as a command-line "
1546: "option");
1.226 dtucker 1547: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1548: if (value < 0)
1549: fatal("%s line %d: Bad Match condition", filename,
1550: linenum);
1551: *activep = value;
1.156 dtucker 1552: break;
1553:
1554: case sPermitOpen:
1555: arg = strdelim(&cp);
1556: if (!arg || *arg == '\0')
1557: fatal("%s line %d: missing PermitOpen specification",
1558: filename, linenum);
1.167 dtucker 1559: n = options->num_permitted_opens; /* modified later */
1.156 dtucker 1560: if (strcmp(arg, "any") == 0) {
1.167 dtucker 1561: if (*activep && n == -1) {
1.156 dtucker 1562: channel_clear_adm_permitted_opens();
1.159 dtucker 1563: options->num_permitted_opens = 0;
1.224 dtucker 1564: }
1565: break;
1566: }
1567: if (strcmp(arg, "none") == 0) {
1568: if (*activep && n == -1) {
1569: options->num_permitted_opens = 1;
1570: channel_disable_adm_local_opens();
1.159 dtucker 1571: }
1.156 dtucker 1572: break;
1573: }
1.166 dtucker 1574: if (*activep && n == -1)
1575: channel_clear_adm_permitted_opens();
1.159 dtucker 1576: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1577: p = hpdelim(&arg);
1578: if (p == NULL)
1579: fatal("%s line %d: missing host in PermitOpen",
1580: filename, linenum);
1581: p = cleanhostname(p);
1.223 dtucker 1582: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1583: fatal("%s line %d: bad port number in "
1584: "PermitOpen", filename, linenum);
1.166 dtucker 1585: if (*activep && n == -1)
1.159 dtucker 1586: options->num_permitted_opens =
1587: channel_add_adm_permitted_opens(p, port);
1588: }
1.153 dtucker 1589: break;
1590:
1.158 dtucker 1591: case sForceCommand:
1.262 dtucker 1592: if (cp == NULL || *cp == '\0')
1.158 dtucker 1593: fatal("%.200s line %d: Missing argument.", filename,
1594: linenum);
1595: len = strspn(cp, WHITESPACE);
1596: if (*activep && options->adm_forced_command == NULL)
1597: options->adm_forced_command = xstrdup(cp + len);
1598: return 0;
1599:
1.176 djm 1600: case sChrootDirectory:
1601: charptr = &options->chroot_directory;
1.177 djm 1602:
1603: arg = strdelim(&cp);
1604: if (!arg || *arg == '\0')
1605: fatal("%s line %d: missing file name.",
1606: filename, linenum);
1607: if (*activep && *charptr == NULL)
1608: *charptr = xstrdup(arg);
1609: break;
1.176 djm 1610:
1.204 djm 1611: case sTrustedUserCAKeys:
1612: charptr = &options->trusted_user_ca_keys;
1613: goto parse_filename;
1614:
1615: case sRevokedKeys:
1616: charptr = &options->revoked_keys_file;
1617: goto parse_filename;
1618:
1.213 djm 1619: case sIPQoS:
1620: arg = strdelim(&cp);
1621: if ((value = parse_ipqos(arg)) == -1)
1622: fatal("%s line %d: Bad IPQoS value: %s",
1623: filename, linenum, arg);
1624: arg = strdelim(&cp);
1625: if (arg == NULL)
1626: value2 = value;
1627: else if ((value2 = parse_ipqos(arg)) == -1)
1628: fatal("%s line %d: Bad IPQoS value: %s",
1629: filename, linenum, arg);
1630: if (*activep) {
1631: options->ip_qos_interactive = value;
1632: options->ip_qos_bulk = value2;
1633: }
1634: break;
1635:
1.225 djm 1636: case sVersionAddendum:
1.262 dtucker 1637: if (cp == NULL || *cp == '\0')
1.225 djm 1638: fatal("%.200s line %d: Missing argument.", filename,
1639: linenum);
1640: len = strspn(cp, WHITESPACE);
1641: if (*activep && options->version_addendum == NULL) {
1642: if (strcasecmp(cp + len, "none") == 0)
1643: options->version_addendum = xstrdup("");
1644: else if (strchr(cp + len, '\r') != NULL)
1645: fatal("%.200s line %d: Invalid argument",
1646: filename, linenum);
1647: else
1648: options->version_addendum = xstrdup(cp + len);
1649: }
1650: return 0;
1651:
1.231 djm 1652: case sAuthorizedKeysCommand:
1.255 jsg 1653: if (cp == NULL)
1654: fatal("%.200s line %d: Missing argument.", filename,
1655: linenum);
1.231 djm 1656: len = strspn(cp, WHITESPACE);
1657: if (*activep && options->authorized_keys_command == NULL) {
1658: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1659: fatal("%.200s line %d: AuthorizedKeysCommand "
1660: "must be an absolute path",
1661: filename, linenum);
1662: options->authorized_keys_command = xstrdup(cp + len);
1663: }
1664: return 0;
1665:
1666: case sAuthorizedKeysCommandUser:
1667: charptr = &options->authorized_keys_command_user;
1668:
1669: arg = strdelim(&cp);
1.255 jsg 1670: if (!arg || *arg == '\0')
1671: fatal("%s line %d: missing AuthorizedKeysCommandUser "
1672: "argument.", filename, linenum);
1.231 djm 1673: if (*activep && *charptr == NULL)
1674: *charptr = xstrdup(arg);
1675: break;
1676:
1.270 djm 1677: case sAuthorizedPrincipalsCommand:
1678: if (cp == NULL)
1679: fatal("%.200s line %d: Missing argument.", filename,
1680: linenum);
1681: len = strspn(cp, WHITESPACE);
1682: if (*activep &&
1683: options->authorized_principals_command == NULL) {
1684: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1685: fatal("%.200s line %d: "
1686: "AuthorizedPrincipalsCommand must be "
1687: "an absolute path", filename, linenum);
1688: options->authorized_principals_command =
1689: xstrdup(cp + len);
1690: }
1691: return 0;
1692:
1693: case sAuthorizedPrincipalsCommandUser:
1694: charptr = &options->authorized_principals_command_user;
1695:
1696: arg = strdelim(&cp);
1697: if (!arg || *arg == '\0')
1698: fatal("%s line %d: missing "
1699: "AuthorizedPrincipalsCommandUser argument.",
1700: filename, linenum);
1701: if (*activep && *charptr == NULL)
1702: *charptr = xstrdup(arg);
1703: break;
1704:
1.232 djm 1705: case sAuthenticationMethods:
1.268 djm 1706: if (options->num_auth_methods == 0) {
1.291 djm 1707: value = 0; /* seen "any" pseudo-method */
1.292 djm 1708: value2 = 0; /* sucessfully parsed any method */
1.232 djm 1709: while ((arg = strdelim(&cp)) && *arg != '\0') {
1710: if (options->num_auth_methods >=
1711: MAX_AUTH_METHODS)
1712: fatal("%s line %d: "
1713: "too many authentication methods.",
1714: filename, linenum);
1.291 djm 1715: if (strcmp(arg, "any") == 0) {
1716: if (options->num_auth_methods > 0) {
1717: fatal("%s line %d: \"any\" "
1718: "must appear alone in "
1719: "AuthenticationMethods",
1720: filename, linenum);
1721: }
1722: value = 1;
1723: } else if (value) {
1724: fatal("%s line %d: \"any\" must appear "
1725: "alone in AuthenticationMethods",
1726: filename, linenum);
1727: } else if (auth2_methods_valid(arg, 0) != 0) {
1.232 djm 1728: fatal("%s line %d: invalid "
1729: "authentication method list.",
1730: filename, linenum);
1.291 djm 1731: }
1.292 djm 1732: value2 = 1;
1.268 djm 1733: if (!*activep)
1734: continue;
1.232 djm 1735: options->auth_methods[
1736: options->num_auth_methods++] = xstrdup(arg);
1737: }
1.292 djm 1738: if (value2 == 0) {
1.291 djm 1739: fatal("%s line %d: no AuthenticationMethods "
1740: "specified", filename, linenum);
1741: }
1.232 djm 1742: }
1743: return 0;
1744:
1.251 millert 1745: case sStreamLocalBindMask:
1746: arg = strdelim(&cp);
1747: if (!arg || *arg == '\0')
1.268 djm 1748: fatal("%s line %d: missing StreamLocalBindMask "
1749: "argument.", filename, linenum);
1.251 millert 1750: /* Parse mode in octal format */
1751: value = strtol(arg, &p, 8);
1752: if (arg == p || value < 0 || value > 0777)
1753: fatal("%s line %d: Bad mask.", filename, linenum);
1.268 djm 1754: if (*activep)
1755: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1.251 millert 1756: break;
1757:
1758: case sStreamLocalBindUnlink:
1759: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1760: goto parse_flag;
1761:
1.256 djm 1762: case sFingerprintHash:
1763: arg = strdelim(&cp);
1764: if (!arg || *arg == '\0')
1765: fatal("%.200s line %d: Missing argument.",
1766: filename, linenum);
1767: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1768: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1769: filename, linenum, arg);
1770: if (*activep)
1771: options->fingerprint_hash = value;
1772: break;
1773:
1.94 markus 1774: case sDeprecated:
1.295 djm 1775: case sIgnore:
1.121 jakob 1776: case sUnsupported:
1.295 djm 1777: do_log2(opcode == sIgnore ?
1778: SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
1779: "%s line %d: %s option %s", filename, linenum,
1780: opcode == sUnsupported ? "Unsupported" : "Deprecated", arg);
1.94 markus 1781: while (arg)
1782: arg = strdelim(&cp);
1783: break;
1784:
1785: default:
1786: fatal("%s line %d: Missing handler for opcode %s (%d)",
1787: filename, linenum, arg, opcode);
1788: }
1789: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1790: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1791: filename, linenum, arg);
1792: return 0;
1793: }
1794:
1795: /* Reads the server configuration file. */
1.25 markus 1796:
1.94 markus 1797: void
1.134 djm 1798: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1799: {
1.229 dtucker 1800: char line[4096], *cp;
1.94 markus 1801: FILE *f;
1.229 dtucker 1802: int lineno = 0;
1.81 stevesk 1803:
1.134 djm 1804: debug2("%s: filename %s", __func__, filename);
1805: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1806: perror(filename);
1807: exit(1);
1808: }
1.134 djm 1809: buffer_clear(conf);
1810: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 1811: lineno++;
1812: if (strlen(line) == sizeof(line) - 1)
1813: fatal("%s line %d too long", filename, lineno);
1.134 djm 1814: /*
1815: * Trim out comments and strip whitespace
1.135 deraadt 1816: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1817: * line numbers later for error messages
1818: */
1819: if ((cp = strchr(line, '#')) != NULL)
1820: memcpy(cp, "\n", 2);
1821: cp = line + strspn(line, " \t\r");
1822:
1823: buffer_append(conf, cp, strlen(cp));
1824: }
1825: buffer_append(conf, "\0", 1);
1826: fclose(f);
1827: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1828: }
1829:
1830: void
1.226 dtucker 1831: parse_server_match_config(ServerOptions *options,
1832: struct connection_info *connectinfo)
1.153 dtucker 1833: {
1834: ServerOptions mo;
1835:
1836: initialize_server_options(&mo);
1.226 dtucker 1837: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 1838: copy_set_server_options(options, &mo, 0);
1.153 dtucker 1839: }
1840:
1.226 dtucker 1841: int parse_server_match_testspec(struct connection_info *ci, char *spec)
1842: {
1843: char *p;
1844:
1845: while ((p = strsep(&spec, ",")) && *p != '\0') {
1846: if (strncmp(p, "addr=", 5) == 0) {
1847: ci->address = xstrdup(p + 5);
1848: } else if (strncmp(p, "host=", 5) == 0) {
1849: ci->host = xstrdup(p + 5);
1850: } else if (strncmp(p, "user=", 5) == 0) {
1851: ci->user = xstrdup(p + 5);
1852: } else if (strncmp(p, "laddr=", 6) == 0) {
1853: ci->laddress = xstrdup(p + 6);
1854: } else if (strncmp(p, "lport=", 6) == 0) {
1855: ci->lport = a2port(p + 6);
1856: if (ci->lport == -1) {
1857: fprintf(stderr, "Invalid port '%s' in test mode"
1858: " specification %s\n", p+6, p);
1859: return -1;
1860: }
1861: } else {
1862: fprintf(stderr, "Invalid test mode specification %s\n",
1863: p);
1864: return -1;
1865: }
1866: }
1867: return 0;
1868: }
1869:
1870: /*
1871: * returns 1 for a complete spec, 0 for partial spec and -1 for an
1872: * empty spec.
1873: */
1874: int server_match_spec_complete(struct connection_info *ci)
1875: {
1876: if (ci->user && ci->host && ci->address)
1877: return 1; /* complete */
1878: if (!ci->user && !ci->host && !ci->address)
1879: return -1; /* empty */
1880: return 0; /* partial */
1881: }
1882:
1.168 dtucker 1883: /*
1884: * Copy any supported values that are set.
1885: *
1.195 jj 1886: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 1887: * array values that are not used pre-authentication, because any that we
1888: * do use must be explictly sent in mm_getpwnamallow().
1889: */
1.153 dtucker 1890: void
1.168 dtucker 1891: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 1892: {
1.247 djm 1893: #define M_CP_INTOPT(n) do {\
1894: if (src->n != -1) \
1895: dst->n = src->n; \
1896: } while (0)
1897:
1.168 dtucker 1898: M_CP_INTOPT(password_authentication);
1899: M_CP_INTOPT(gss_authentication);
1900: M_CP_INTOPT(pubkey_authentication);
1901: M_CP_INTOPT(kerberos_authentication);
1902: M_CP_INTOPT(hostbased_authentication);
1.209 djm 1903: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 1904: M_CP_INTOPT(kbd_interactive_authentication);
1.175 dtucker 1905: M_CP_INTOPT(permit_root_login);
1.188 djm 1906: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 1907:
1908: M_CP_INTOPT(allow_tcp_forwarding);
1.251 millert 1909: M_CP_INTOPT(allow_streamlocal_forwarding);
1.178 pyr 1910: M_CP_INTOPT(allow_agent_forwarding);
1.209 djm 1911: M_CP_INTOPT(permit_tun);
1.251 millert 1912: M_CP_INTOPT(fwd_opts.gateway_ports);
1.289 djm 1913: M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
1.168 dtucker 1914: M_CP_INTOPT(x11_display_offset);
1915: M_CP_INTOPT(x11_forwarding);
1916: M_CP_INTOPT(x11_use_localhost);
1.244 djm 1917: M_CP_INTOPT(permit_tty);
1.250 djm 1918: M_CP_INTOPT(permit_user_rc);
1.180 djm 1919: M_CP_INTOPT(max_sessions);
1.184 dtucker 1920: M_CP_INTOPT(max_authtries);
1.213 djm 1921: M_CP_INTOPT(ip_qos_interactive);
1922: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 1923: M_CP_INTOPT(rekey_limit);
1924: M_CP_INTOPT(rekey_interval);
1.289 djm 1925:
1926: /*
1927: * The bind_mask is a mode_t that may be unsigned, so we can't use
1928: * M_CP_INTOPT - it does a signed comparison that causes compiler
1929: * warnings.
1930: */
1.290 dtucker 1931: if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
1.289 djm 1932: dst->fwd_opts.streamlocal_bind_mask =
1933: src->fwd_opts.streamlocal_bind_mask;
1934: }
1.247 djm 1935:
1936: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
1937: #define M_CP_STROPT(n) do {\
1938: if (src->n != NULL && dst->n != src->n) { \
1939: free(dst->n); \
1940: dst->n = src->n; \
1941: } \
1942: } while(0)
1943: #define M_CP_STRARRAYOPT(n, num_n) do {\
1944: if (src->num_n != 0) { \
1945: for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \
1946: dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \
1947: } \
1948: } while(0)
1.168 dtucker 1949:
1.218 djm 1950: /* See comment in servconf.h */
1951: COPY_MATCH_STRING_OPTS();
1.282 djm 1952:
1953: /* Arguments that accept '+...' need to be expanded */
1954: assemble_algorithms(dst);
1.216 djm 1955:
1.217 dtucker 1956: /*
1957: * The only things that should be below this point are string options
1958: * which are only used after authentication.
1959: */
1.168 dtucker 1960: if (preauth)
1961: return;
1.219 djm 1962:
1.283 djm 1963: /* These options may be "none" to clear a global setting */
1.168 dtucker 1964: M_CP_STROPT(adm_forced_command);
1.283 djm 1965: if (option_clear_or_none(dst->adm_forced_command)) {
1966: free(dst->adm_forced_command);
1967: dst->adm_forced_command = NULL;
1968: }
1.176 djm 1969: M_CP_STROPT(chroot_directory);
1.283 djm 1970: if (option_clear_or_none(dst->chroot_directory)) {
1971: free(dst->chroot_directory);
1972: dst->chroot_directory = NULL;
1973: }
1.153 dtucker 1974: }
1.168 dtucker 1975:
1976: #undef M_CP_INTOPT
1977: #undef M_CP_STROPT
1.219 djm 1978: #undef M_CP_STRARRAYOPT
1.153 dtucker 1979:
1980: void
1981: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 1982: struct connection_info *connectinfo)
1.134 djm 1983: {
1.153 dtucker 1984: int active, linenum, bad_options = 0;
1.136 dtucker 1985: char *cp, *obuf, *cbuf;
1.134 djm 1986:
1987: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1988:
1.287 djm 1989: if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
1990: fatal("%s: sshbuf_dup_string failed", __func__);
1.226 dtucker 1991: active = connectinfo ? 0 : 1;
1.137 dtucker 1992: linenum = 1;
1.140 deraadt 1993: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1994: if (process_server_config_line(options, cp, filename,
1.226 dtucker 1995: linenum++, &active, connectinfo) != 0)
1.94 markus 1996: bad_options++;
1.1 deraadt 1997: }
1.239 djm 1998: free(obuf);
1.78 stevesk 1999: if (bad_options > 0)
2000: fatal("%s: terminating, %d bad configuration options",
2001: filename, bad_options);
1.266 dtucker 2002: process_queued_listen_addrs(options);
1.182 dtucker 2003: }
2004:
2005: static const char *
1.221 djm 2006: fmt_multistate_int(int val, const struct multistate *m)
2007: {
2008: u_int i;
2009:
2010: for (i = 0; m[i].key != NULL; i++) {
2011: if (m[i].value == val)
2012: return m[i].key;
2013: }
2014: return "UNKNOWN";
2015: }
2016:
2017: static const char *
1.182 dtucker 2018: fmt_intarg(ServerOpCodes code, int val)
2019: {
1.221 djm 2020: if (val == -1)
2021: return "unset";
2022: switch (code) {
2023: case sAddressFamily:
2024: return fmt_multistate_int(val, multistate_addressfamily);
2025: case sPermitRootLogin:
2026: return fmt_multistate_int(val, multistate_permitrootlogin);
2027: case sGatewayPorts:
2028: return fmt_multistate_int(val, multistate_gatewayports);
2029: case sCompression:
2030: return fmt_multistate_int(val, multistate_compression);
1.222 djm 2031: case sUsePrivilegeSeparation:
2032: return fmt_multistate_int(val, multistate_privsep);
1.233 djm 2033: case sAllowTcpForwarding:
2034: return fmt_multistate_int(val, multistate_tcpfwd);
1.251 millert 2035: case sAllowStreamLocalForwarding:
2036: return fmt_multistate_int(val, multistate_tcpfwd);
1.256 djm 2037: case sFingerprintHash:
2038: return ssh_digest_alg_name(val);
1.221 djm 2039: default:
2040: switch (val) {
2041: case 0:
2042: return "no";
2043: case 1:
2044: return "yes";
2045: default:
2046: return "UNKNOWN";
2047: }
1.182 dtucker 2048: }
2049: }
2050:
2051: static const char *
2052: lookup_opcode_name(ServerOpCodes code)
2053: {
2054: u_int i;
2055:
2056: for (i = 0; keywords[i].name != NULL; i++)
2057: if (keywords[i].opcode == code)
2058: return(keywords[i].name);
2059: return "UNKNOWN";
2060: }
2061:
2062: static void
2063: dump_cfg_int(ServerOpCodes code, int val)
2064: {
2065: printf("%s %d\n", lookup_opcode_name(code), val);
2066: }
2067:
2068: static void
1.263 dtucker 2069: dump_cfg_oct(ServerOpCodes code, int val)
2070: {
2071: printf("%s 0%o\n", lookup_opcode_name(code), val);
2072: }
2073:
2074: static void
1.182 dtucker 2075: dump_cfg_fmtint(ServerOpCodes code, int val)
2076: {
2077: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2078: }
2079:
2080: static void
2081: dump_cfg_string(ServerOpCodes code, const char *val)
2082: {
2083: if (val == NULL)
2084: return;
1.257 djm 2085: printf("%s %s\n", lookup_opcode_name(code),
2086: val == NULL ? "none" : val);
1.182 dtucker 2087: }
2088:
2089: static void
2090: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
2091: {
2092: u_int i;
2093:
2094: for (i = 0; i < count; i++)
1.219 djm 2095: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2096: }
2097:
2098: static void
2099: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
2100: {
2101: u_int i;
2102:
1.291 djm 2103: if (count <= 0 && code != sAuthenticationMethods)
1.261 dtucker 2104: return;
1.219 djm 2105: printf("%s", lookup_opcode_name(code));
2106: for (i = 0; i < count; i++)
2107: printf(" %s", vals[i]);
1.291 djm 2108: if (code == sAuthenticationMethods && count == 0)
2109: printf(" any");
1.219 djm 2110: printf("\n");
1.182 dtucker 2111: }
2112:
2113: void
2114: dump_config(ServerOptions *o)
2115: {
2116: u_int i;
2117: int ret;
2118: struct addrinfo *ai;
2119: char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL;
1.263 dtucker 2120: char *laddr1 = xstrdup(""), *laddr2 = NULL;
1.182 dtucker 2121:
2122: /* these are usually at the top of the config */
2123: for (i = 0; i < o->num_ports; i++)
2124: printf("port %d\n", o->ports[i]);
2125: dump_cfg_fmtint(sAddressFamily, o->address_family);
2126:
1.263 dtucker 2127: /*
2128: * ListenAddress must be after Port. add_one_listen_addr pushes
2129: * addresses onto a stack, so to maintain ordering we need to
2130: * print these in reverse order.
2131: */
1.182 dtucker 2132: for (ai = o->listen_addrs; ai; ai = ai->ai_next) {
2133: if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
2134: sizeof(addr), port, sizeof(port),
2135: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
2136: error("getnameinfo failed: %.100s",
2137: (ret != EAI_SYSTEM) ? gai_strerror(ret) :
2138: strerror(errno));
2139: } else {
1.263 dtucker 2140: laddr2 = laddr1;
1.182 dtucker 2141: if (ai->ai_family == AF_INET6)
1.263 dtucker 2142: xasprintf(&laddr1, "listenaddress [%s]:%s\n%s",
2143: addr, port, laddr2);
1.182 dtucker 2144: else
1.263 dtucker 2145: xasprintf(&laddr1, "listenaddress %s:%s\n%s",
2146: addr, port, laddr2);
2147: free(laddr2);
1.182 dtucker 2148: }
2149: }
1.263 dtucker 2150: printf("%s", laddr1);
2151: free(laddr1);
1.182 dtucker 2152:
2153: /* integer arguments */
2154: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
2155: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
2156: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 2157: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 2158: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
2159: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1.263 dtucker 2160: dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
1.182 dtucker 2161:
2162: /* formatted integer arguments */
2163: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
2164: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
2165: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
2166: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
2167: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
2168: o->hostbased_uses_name_from_packet_only);
2169: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 2170: #ifdef KRB5
1.182 dtucker 2171: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
2172: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
2173: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
2174: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 2175: #endif
2176: #ifdef GSSAPI
1.182 dtucker 2177: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
2178: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.187 djm 2179: #endif
1.182 dtucker 2180: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
2181: dump_cfg_fmtint(sKbdInteractiveAuthentication,
2182: o->kbd_interactive_authentication);
2183: dump_cfg_fmtint(sChallengeResponseAuthentication,
2184: o->challenge_response_authentication);
2185: dump_cfg_fmtint(sPrintMotd, o->print_motd);
2186: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
2187: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
2188: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 2189: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.250 djm 2190: dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
1.182 dtucker 2191: dump_cfg_fmtint(sStrictModes, o->strict_modes);
2192: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
2193: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
2194: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
2195: dump_cfg_fmtint(sCompression, o->compression);
1.251 millert 2196: dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
1.182 dtucker 2197: dump_cfg_fmtint(sUseDNS, o->use_dns);
2198: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1.261 dtucker 2199: dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
1.251 millert 2200: dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
1.288 djm 2201: dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
1.182 dtucker 2202: dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
1.256 djm 2203: dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
1.182 dtucker 2204:
2205: /* string arguments */
2206: dump_cfg_string(sPidFile, o->pid_file);
2207: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.252 djm 2208: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
2209: dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
1.182 dtucker 2210: dump_cfg_string(sBanner, o->banner);
2211: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 2212: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 2213: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
2214: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 2215: dump_cfg_string(sAuthorizedPrincipalsFile,
2216: o->authorized_principals_file);
1.261 dtucker 2217: dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
2218: ? "none" : o->version_addendum);
1.231 djm 2219: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2220: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.270 djm 2221: dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
2222: dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
1.240 markus 2223: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.252 djm 2224: dump_cfg_string(sKexAlgorithms,
1.253 djm 2225: o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
1.258 djm 2226: dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
2227: o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
1.276 markus 2228: dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
2229: o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG);
1.258 djm 2230: dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ?
2231: o->pubkey_key_types : KEX_DEFAULT_PK_ALG);
1.182 dtucker 2232:
2233: /* string arguments requiring a lookup */
2234: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2235: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2236:
2237: /* string array arguments */
1.219 djm 2238: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2239: o->authorized_keys_files);
1.182 dtucker 2240: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2241: o->host_key_files);
1.261 dtucker 2242: dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
1.203 djm 2243: o->host_cert_files);
1.182 dtucker 2244: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2245: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2246: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2247: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2248: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2249: dump_cfg_strarray_oneline(sAuthenticationMethods,
2250: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2251:
2252: /* other arguments */
2253: for (i = 0; i < o->num_subsystems; i++)
2254: printf("subsystem %s %s\n", o->subsystem_name[i],
2255: o->subsystem_args[i]);
2256:
2257: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2258: o->max_startups_rate, o->max_startups);
2259:
2260: for (i = 0; tunmode_desc[i].val != -1; i++)
2261: if (tunmode_desc[i].val == o->permit_tun) {
2262: s = tunmode_desc[i].text;
2263: break;
2264: }
2265: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2266:
1.214 stevesk 2267: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2268: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2269:
1.284 dtucker 2270: printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
1.241 djm 2271: o->rekey_interval);
1.182 dtucker 2272:
2273: channel_print_adm_permitted_opens();
1.1 deraadt 2274: }
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