Annotation of src/usr.bin/ssh/servconf.c, Revision 1.248
1.226 dtucker 1:
1.248 ! markus 2: /* $OpenBSD: servconf.c,v 1.247 2013/12/05 01:16:41 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/in_systm.h>
20: #include <netinet/ip.h>
21:
1.235 dtucker 22: #include <ctype.h>
1.154 stevesk 23: #include <netdb.h>
1.165 dtucker 24: #include <pwd.h>
1.162 stevesk 25: #include <stdio.h>
1.161 stevesk 26: #include <stdlib.h>
1.160 stevesk 27: #include <string.h>
1.164 deraadt 28: #include <signal.h>
1.155 stevesk 29: #include <unistd.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"
1.1 deraadt 38: #include "servconf.h"
1.33 markus 39: #include "compat.h"
1.60 markus 40: #include "pathnames.h"
1.62 markus 41: #include "misc.h"
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"
1.1 deraadt 53:
1.194 djm 54: static void add_listen_addr(ServerOptions *, char *, int);
55: static void add_one_listen_addr(ServerOptions *, char *, int);
1.29 markus 56:
1.102 provos 57: /* Use of privilege separation or not */
58: extern int use_privsep;
1.153 dtucker 59: extern Buffer cfg;
1.62 markus 60:
1.1 deraadt 61: /* Initializes the server options to their default values. */
62:
1.34 markus 63: void
1.25 markus 64: initialize_server_options(ServerOptions *options)
1.1 deraadt 65: {
1.25 markus 66: memset(options, 0, sizeof(*options));
1.29 markus 67: options->num_ports = 0;
68: options->ports_from_cmdline = 0;
69: options->listen_addrs = NULL;
1.138 djm 70: options->address_family = -1;
1.54 markus 71: options->num_host_key_files = 0;
1.203 djm 72: options->num_host_cert_files = 0;
1.240 markus 73: options->host_key_agent = NULL;
1.36 markus 74: options->pid_file = NULL;
1.25 markus 75: options->server_key_bits = -1;
76: options->login_grace_time = -1;
77: options->key_regeneration_time = -1;
1.67 markus 78: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 79: options->ignore_rhosts = -1;
80: options->ignore_user_known_hosts = -1;
81: options->print_motd = -1;
1.72 stevesk 82: options->print_lastlog = -1;
1.25 markus 83: options->x11_forwarding = -1;
84: options->x11_display_offset = -1;
1.99 stevesk 85: options->x11_use_localhost = -1;
1.244 djm 86: options->permit_tty = -1;
1.42 markus 87: options->xauth_location = NULL;
1.25 markus 88: options->strict_modes = -1;
1.129 markus 89: options->tcp_keep_alive = -1;
1.101 markus 90: options->log_facility = SYSLOG_FACILITY_NOT_SET;
91: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 92: options->rhosts_rsa_authentication = -1;
1.75 markus 93: options->hostbased_authentication = -1;
94: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 95: options->rsa_authentication = -1;
1.54 markus 96: options->pubkey_authentication = -1;
1.25 markus 97: options->kerberos_authentication = -1;
98: options->kerberos_or_local_passwd = -1;
99: options->kerberos_ticket_cleanup = -1;
1.130 jakob 100: options->kerberos_get_afs_token = -1;
1.125 markus 101: options->gss_authentication=-1;
102: options->gss_cleanup_creds = -1;
1.25 markus 103: options->password_authentication = -1;
1.52 markus 104: options->kbd_interactive_authentication = -1;
1.80 markus 105: options->challenge_response_authentication = -1;
1.25 markus 106: options->permit_empty_passwd = -1;
1.113 markus 107: options->permit_user_env = -1;
1.25 markus 108: options->use_login = -1;
1.111 markus 109: options->compression = -1;
1.235 dtucker 110: options->rekey_limit = -1;
111: options->rekey_interval = -1;
1.53 markus 112: options->allow_tcp_forwarding = -1;
1.178 pyr 113: options->allow_agent_forwarding = -1;
1.25 markus 114: options->num_allow_users = 0;
115: options->num_deny_users = 0;
116: options->num_allow_groups = 0;
117: options->num_deny_groups = 0;
1.33 markus 118: options->ciphers = NULL;
1.66 markus 119: options->macs = NULL;
1.211 djm 120: options->kex_algorithms = NULL;
1.33 markus 121: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 122: options->gateway_ports = -1;
1.43 jakob 123: options->num_subsystems = 0;
1.50 markus 124: options->max_startups_begin = -1;
125: options->max_startups_rate = -1;
1.46 markus 126: options->max_startups = -1;
1.133 dtucker 127: options->max_authtries = -1;
1.180 djm 128: options->max_sessions = -1;
1.57 markus 129: options->banner = NULL;
1.122 markus 130: options->use_dns = -1;
1.77 beck 131: options->client_alive_interval = -1;
132: options->client_alive_count_max = -1;
1.219 djm 133: options->num_authkeys_files = 0;
1.131 djm 134: options->num_accept_env = 0;
1.145 reyk 135: options->permit_tun = -1;
1.159 dtucker 136: options->num_permitted_opens = -1;
1.158 dtucker 137: options->adm_forced_command = NULL;
1.176 djm 138: options->chroot_directory = NULL;
1.231 djm 139: options->authorized_keys_command = NULL;
140: options->authorized_keys_command_user = NULL;
1.190 djm 141: options->zero_knowledge_password_authentication = -1;
1.204 djm 142: options->revoked_keys_file = NULL;
143: options->trusted_user_ca_keys = NULL;
1.208 djm 144: options->authorized_principals_file = NULL;
1.213 djm 145: options->ip_qos_interactive = -1;
146: options->ip_qos_bulk = -1;
1.225 djm 147: options->version_addendum = NULL;
1.1 deraadt 148: }
149:
1.34 markus 150: void
1.25 markus 151: fill_default_server_options(ServerOptions *options)
1.1 deraadt 152: {
1.54 markus 153: if (options->protocol == SSH_PROTO_UNKNOWN)
1.196 markus 154: options->protocol = SSH_PROTO_2;
1.54 markus 155: if (options->num_host_key_files == 0) {
156: /* fill default hostkeys for protocols */
157: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 158: options->host_key_files[options->num_host_key_files++] =
159: _PATH_HOST_KEY_FILE;
160: if (options->protocol & SSH_PROTO_2) {
161: options->host_key_files[options->num_host_key_files++] =
162: _PATH_HOST_RSA_KEY_FILE;
163: options->host_key_files[options->num_host_key_files++] =
164: _PATH_HOST_DSA_KEY_FILE;
1.210 naddy 165: options->host_key_files[options->num_host_key_files++] =
166: _PATH_HOST_ECDSA_KEY_FILE;
1.248 ! markus 167: options->host_key_files[options->num_host_key_files++] =
! 168: _PATH_HOST_ED25519_KEY_FILE;
1.97 stevesk 169: }
1.54 markus 170: }
1.203 djm 171: /* No certificates by default */
1.29 markus 172: if (options->num_ports == 0)
173: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
174: if (options->listen_addrs == NULL)
1.76 stevesk 175: add_listen_addr(options, NULL, 0);
1.36 markus 176: if (options->pid_file == NULL)
1.60 markus 177: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 178: if (options->server_key_bits == -1)
1.185 djm 179: options->server_key_bits = 1024;
1.25 markus 180: if (options->login_grace_time == -1)
1.115 stevesk 181: options->login_grace_time = 120;
1.25 markus 182: if (options->key_regeneration_time == -1)
183: options->key_regeneration_time = 3600;
1.67 markus 184: if (options->permit_root_login == PERMIT_NOT_SET)
185: options->permit_root_login = PERMIT_YES;
1.25 markus 186: if (options->ignore_rhosts == -1)
1.30 markus 187: options->ignore_rhosts = 1;
1.25 markus 188: if (options->ignore_user_known_hosts == -1)
189: options->ignore_user_known_hosts = 0;
190: if (options->print_motd == -1)
191: options->print_motd = 1;
1.72 stevesk 192: if (options->print_lastlog == -1)
193: options->print_lastlog = 1;
1.25 markus 194: if (options->x11_forwarding == -1)
1.30 markus 195: options->x11_forwarding = 0;
1.25 markus 196: if (options->x11_display_offset == -1)
1.30 markus 197: options->x11_display_offset = 10;
1.99 stevesk 198: if (options->x11_use_localhost == -1)
199: options->x11_use_localhost = 1;
1.42 markus 200: if (options->xauth_location == NULL)
1.83 markus 201: options->xauth_location = _PATH_XAUTH;
1.244 djm 202: if (options->permit_tty == -1)
203: options->permit_tty = 1;
1.25 markus 204: if (options->strict_modes == -1)
205: options->strict_modes = 1;
1.129 markus 206: if (options->tcp_keep_alive == -1)
207: options->tcp_keep_alive = 1;
1.101 markus 208: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 209: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 210: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 211: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 212: if (options->rhosts_rsa_authentication == -1)
1.30 markus 213: options->rhosts_rsa_authentication = 0;
1.75 markus 214: if (options->hostbased_authentication == -1)
215: options->hostbased_authentication = 0;
216: if (options->hostbased_uses_name_from_packet_only == -1)
217: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 218: if (options->rsa_authentication == -1)
219: options->rsa_authentication = 1;
1.54 markus 220: if (options->pubkey_authentication == -1)
221: options->pubkey_authentication = 1;
1.25 markus 222: if (options->kerberos_authentication == -1)
1.107 markus 223: options->kerberos_authentication = 0;
1.25 markus 224: if (options->kerberos_or_local_passwd == -1)
225: options->kerberos_or_local_passwd = 1;
226: if (options->kerberos_ticket_cleanup == -1)
227: options->kerberos_ticket_cleanup = 1;
1.130 jakob 228: if (options->kerberos_get_afs_token == -1)
229: options->kerberos_get_afs_token = 0;
1.125 markus 230: if (options->gss_authentication == -1)
231: options->gss_authentication = 0;
232: if (options->gss_cleanup_creds == -1)
233: options->gss_cleanup_creds = 1;
1.25 markus 234: if (options->password_authentication == -1)
235: options->password_authentication = 1;
1.52 markus 236: if (options->kbd_interactive_authentication == -1)
237: options->kbd_interactive_authentication = 0;
1.80 markus 238: if (options->challenge_response_authentication == -1)
239: options->challenge_response_authentication = 1;
1.25 markus 240: if (options->permit_empty_passwd == -1)
1.30 markus 241: options->permit_empty_passwd = 0;
1.113 markus 242: if (options->permit_user_env == -1)
243: options->permit_user_env = 0;
1.25 markus 244: if (options->use_login == -1)
245: options->use_login = 0;
1.111 markus 246: if (options->compression == -1)
1.143 markus 247: options->compression = COMP_DELAYED;
1.235 dtucker 248: if (options->rekey_limit == -1)
249: options->rekey_limit = 0;
250: if (options->rekey_interval == -1)
251: options->rekey_interval = 0;
1.53 markus 252: if (options->allow_tcp_forwarding == -1)
1.233 djm 253: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.178 pyr 254: if (options->allow_agent_forwarding == -1)
255: options->allow_agent_forwarding = 1;
1.38 markus 256: if (options->gateway_ports == -1)
257: options->gateway_ports = 0;
1.46 markus 258: if (options->max_startups == -1)
1.234 dtucker 259: options->max_startups = 100;
1.50 markus 260: if (options->max_startups_rate == -1)
1.234 dtucker 261: options->max_startups_rate = 30; /* 30% */
1.50 markus 262: if (options->max_startups_begin == -1)
1.234 dtucker 263: options->max_startups_begin = 10;
1.133 dtucker 264: if (options->max_authtries == -1)
265: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 266: if (options->max_sessions == -1)
267: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 268: if (options->use_dns == -1)
269: options->use_dns = 1;
1.77 beck 270: if (options->client_alive_interval == -1)
1.95 deraadt 271: options->client_alive_interval = 0;
1.77 beck 272: if (options->client_alive_count_max == -1)
273: options->client_alive_count_max = 3;
1.219 djm 274: if (options->num_authkeys_files == 0) {
275: options->authorized_keys_files[options->num_authkeys_files++] =
276: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS);
277: options->authorized_keys_files[options->num_authkeys_files++] =
278: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS2);
279: }
1.145 reyk 280: if (options->permit_tun == -1)
1.146 reyk 281: options->permit_tun = SSH_TUNMODE_NO;
1.190 djm 282: if (options->zero_knowledge_password_authentication == -1)
283: options->zero_knowledge_password_authentication = 0;
1.213 djm 284: if (options->ip_qos_interactive == -1)
285: options->ip_qos_interactive = IPTOS_LOWDELAY;
286: if (options->ip_qos_bulk == -1)
287: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 288: if (options->version_addendum == NULL)
289: options->version_addendum = xstrdup("");
1.110 markus 290: /* Turn privilege separation on by default */
1.102 provos 291: if (use_privsep == -1)
1.228 djm 292: use_privsep = PRIVSEP_NOSANDBOX;
1.1 deraadt 293: }
294:
295: /* Keyword tokens. */
1.25 markus 296: typedef enum {
297: sBadOption, /* == unknown option */
298: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
299: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 300: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 301: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 302: sKerberosGetAFSToken,
1.123 markus 303: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 304: sPasswordAuthentication, sKbdInteractiveAuthentication,
305: sListenAddress, sAddressFamily,
1.72 stevesk 306: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 307: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.244 djm 308: sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 309: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.235 dtucker 310: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 311: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 312: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
1.180 djm 313: sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 314: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 315: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.219 djm 316: sClientAliveCountMax, sAuthorizedKeysFile,
1.145 reyk 317: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.176 djm 318: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 319: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.203 djm 320: sZeroKnowledgePasswordAuthentication, sHostCertificate,
1.208 djm 321: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.225 djm 322: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 323: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.240 markus 324: sAuthenticationMethods, sHostKeyAgent,
1.121 jakob 325: sDeprecated, sUnsupported
1.1 deraadt 326: } ServerOpCodes;
327:
1.153 dtucker 328: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
329: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
330: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
331:
1.1 deraadt 332: /* Textual representation of the tokens. */
1.25 markus 333: static struct {
334: const char *name;
335: ServerOpCodes opcode;
1.153 dtucker 336: u_int flags;
1.25 markus 337: } keywords[] = {
1.153 dtucker 338: { "port", sPort, SSHCFG_GLOBAL },
339: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
340: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
1.240 markus 341: { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
1.153 dtucker 342: { "pidfile", sPidFile, SSHCFG_GLOBAL },
343: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
344: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
345: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
1.175 dtucker 346: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 347: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
348: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
349: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.168 dtucker 350: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL },
351: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 352: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.168 dtucker 353: { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL },
354: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.153 dtucker 355: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 356: #ifdef KRB5
1.168 dtucker 357: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 358: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
359: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
360: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 361: #else
1.168 dtucker 362: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 363: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
364: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
365: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 366: #endif
1.153 dtucker 367: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
368: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 369: #ifdef GSSAPI
1.168 dtucker 370: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 371: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.125 markus 372: #else
1.168 dtucker 373: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 374: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 375: #endif
1.168 dtucker 376: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
377: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 378: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 379: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
1.190 djm 380: #ifdef JPAKE
381: { "zeroknowledgepasswordauthentication", sZeroKnowledgePasswordAuthentication, SSHCFG_ALL },
382: #else
383: { "zeroknowledgepasswordauthentication", sUnsupported, SSHCFG_ALL },
384: #endif
1.153 dtucker 385: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
386: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
387: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
388: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
389: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
390: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
391: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 392: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
393: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
394: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 395: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
396: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 397: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 398: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
399: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
400: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 401: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 402: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
403: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
404: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 405: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 406: { "allowusers", sAllowUsers, SSHCFG_ALL },
407: { "denyusers", sDenyUsers, SSHCFG_ALL },
408: { "allowgroups", sAllowGroups, SSHCFG_ALL },
409: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 410: { "ciphers", sCiphers, SSHCFG_GLOBAL },
411: { "macs", sMacs, SSHCFG_GLOBAL },
412: { "protocol", sProtocol, SSHCFG_GLOBAL },
413: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
414: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
415: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 416: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 417: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 418: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 419: { "usedns", sUseDNS, SSHCFG_GLOBAL },
420: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
421: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
422: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
423: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
1.209 djm 424: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 425: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.153 dtucker 426: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
1.227 markus 427: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 428: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.244 djm 429: { "permittty", sPermitTTY, SSHCFG_ALL },
1.153 dtucker 430: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 431: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 432: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 433: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 434: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 435: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
436: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 437: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 438: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 439: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 440: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
441: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.225 djm 442: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 443: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.153 dtucker 444: { NULL, sBadOption, 0 }
1.1 deraadt 445: };
446:
1.182 dtucker 447: static struct {
448: int val;
449: char *text;
450: } tunmode_desc[] = {
451: { SSH_TUNMODE_NO, "no" },
452: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
453: { SSH_TUNMODE_ETHERNET, "ethernet" },
454: { SSH_TUNMODE_YES, "yes" },
455: { -1, NULL }
456: };
457:
1.27 markus 458: /*
1.73 stevesk 459: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 460: */
1.1 deraadt 461:
1.34 markus 462: static ServerOpCodes
1.25 markus 463: parse_token(const char *cp, const char *filename,
1.153 dtucker 464: int linenum, u_int *flags)
1.1 deraadt 465: {
1.55 markus 466: u_int i;
1.1 deraadt 467:
1.25 markus 468: for (i = 0; keywords[i].name; i++)
1.153 dtucker 469: if (strcasecmp(cp, keywords[i].name) == 0) {
470: *flags = keywords[i].flags;
1.25 markus 471: return keywords[i].opcode;
1.153 dtucker 472: }
1.25 markus 473:
1.78 stevesk 474: error("%s: line %d: Bad configuration option: %s",
475: filename, linenum, cp);
1.25 markus 476: return sBadOption;
1.1 deraadt 477: }
478:
1.202 djm 479: char *
480: derelativise_path(const char *path)
481: {
1.207 djm 482: char *expanded, *ret, cwd[MAXPATHLEN];
1.202 djm 483:
484: expanded = tilde_expand_filename(path, getuid());
485: if (*expanded == '/')
486: return expanded;
1.207 djm 487: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 488: fatal("%s: getcwd: %s", __func__, strerror(errno));
489: xasprintf(&ret, "%s/%s", cwd, expanded);
1.239 djm 490: free(expanded);
1.202 djm 491: return ret;
492: }
493:
1.84 itojun 494: static void
1.194 djm 495: add_listen_addr(ServerOptions *options, char *addr, int port)
1.74 stevesk 496: {
1.142 djm 497: u_int i;
1.74 stevesk 498:
499: if (options->num_ports == 0)
500: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 501: if (options->address_family == -1)
502: options->address_family = AF_UNSPEC;
1.76 stevesk 503: if (port == 0)
1.74 stevesk 504: for (i = 0; i < options->num_ports; i++)
505: add_one_listen_addr(options, addr, options->ports[i]);
506: else
1.76 stevesk 507: add_one_listen_addr(options, addr, port);
1.74 stevesk 508: }
509:
1.84 itojun 510: static void
1.194 djm 511: add_one_listen_addr(ServerOptions *options, char *addr, int port)
1.29 markus 512: {
513: struct addrinfo hints, *ai, *aitop;
514: char strport[NI_MAXSERV];
515: int gaierr;
516:
1.74 stevesk 517: memset(&hints, 0, sizeof(hints));
1.138 djm 518: hints.ai_family = options->address_family;
1.74 stevesk 519: hints.ai_socktype = SOCK_STREAM;
520: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 521: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 522: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
523: fatal("bad addr or host: %s (%s)",
524: addr ? addr : "<NULL>",
1.173 dtucker 525: ssh_gai_strerror(gaierr));
1.74 stevesk 526: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
527: ;
528: ai->ai_next = options->listen_addrs;
529: options->listen_addrs = aitop;
1.29 markus 530: }
531:
1.226 dtucker 532: struct connection_info *
533: get_connection_info(int populate, int use_dns)
534: {
535: static struct connection_info ci;
536:
537: if (!populate)
538: return &ci;
539: ci.host = get_canonical_hostname(use_dns);
540: ci.address = get_remote_ipaddr();
541: ci.laddress = get_local_ipaddr(packet_get_connection_in());
542: ci.lport = get_local_port();
543: return &ci;
544: }
545:
1.153 dtucker 546: /*
547: * The strategy for the Match blocks is that the config file is parsed twice.
548: *
549: * The first time is at startup. activep is initialized to 1 and the
550: * directives in the global context are processed and acted on. Hitting a
551: * Match directive unsets activep and the directives inside the block are
552: * checked for syntax only.
553: *
554: * The second time is after a connection has been established but before
555: * authentication. activep is initialized to 2 and global config directives
556: * are ignored since they have already been processed. If the criteria in a
557: * Match block is met, activep is set and the subsequent directives
558: * processed and actioned until EOF or another Match block unsets it. Any
559: * options set are copied into the main server config.
560: *
561: * Potential additions/improvements:
562: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
563: *
564: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
565: * Match Address 192.168.0.*
566: * Tag trusted
567: * Match Group wheel
568: * Tag trusted
569: * Match Tag trusted
570: * AllowTcpForwarding yes
571: * GatewayPorts clientspecified
572: * [...]
573: *
574: * - Add a PermittedChannelRequests directive
575: * Match Group shell
576: * PermittedChannelRequests session,forwarded-tcpip
577: */
578:
579: static int
1.165 dtucker 580: match_cfg_line_group(const char *grps, int line, const char *user)
581: {
582: int result = 0;
583: struct passwd *pw;
584:
585: if (user == NULL)
586: goto out;
587:
588: if ((pw = getpwnam(user)) == NULL) {
589: debug("Can't match group at line %d because user %.100s does "
590: "not exist", line, user);
591: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
592: debug("Can't Match group because user %.100s not in any group "
593: "at line %d", user, line);
1.186 djm 594: } else if (ga_match_pattern_list(grps) != 1) {
595: debug("user %.100s does not match group list %.100s at line %d",
596: user, grps, line);
1.165 dtucker 597: } else {
1.186 djm 598: debug("user %.100s matched group list %.100s at line %d", user,
599: grps, line);
1.165 dtucker 600: result = 1;
601: }
602: out:
603: ga_free();
604: return result;
605: }
606:
1.226 dtucker 607: /*
1.230 dtucker 608: * All of the attributes on a single Match line are ANDed together, so we need
1.242 dtucker 609: * to check every attribute and set the result to zero if any attribute does
1.230 dtucker 610: * not match.
1.226 dtucker 611: */
1.165 dtucker 612: static int
1.226 dtucker 613: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 614: {
1.243 dtucker 615: int result = 1, attributes = 0, port;
1.153 dtucker 616: char *arg, *attrib, *cp = *condition;
617: size_t len;
618:
1.226 dtucker 619: if (ci == NULL)
1.153 dtucker 620: debug3("checking syntax for 'Match %s'", cp);
621: else
1.226 dtucker 622: debug3("checking match for '%s' user %s host %s addr %s "
623: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
624: ci->host ? ci->host : "(null)",
625: ci->address ? ci->address : "(null)",
626: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 627:
628: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.243 dtucker 629: attributes++;
630: if (strcasecmp(attrib, "all") == 0) {
631: if (attributes != 1 ||
632: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
633: error("'all' cannot be combined with other "
634: "Match attributes");
635: return -1;
636: }
637: *condition = cp;
638: return 1;
639: }
1.153 dtucker 640: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
641: error("Missing Match criteria for %s", attrib);
642: return -1;
643: }
644: len = strlen(arg);
645: if (strcasecmp(attrib, "user") == 0) {
1.226 dtucker 646: if (ci == NULL || ci->user == NULL) {
1.153 dtucker 647: result = 0;
648: continue;
649: }
1.226 dtucker 650: if (match_pattern_list(ci->user, arg, len, 0) != 1)
1.153 dtucker 651: result = 0;
652: else
653: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 654: "line %d", ci->user, arg, line);
1.165 dtucker 655: } else if (strcasecmp(attrib, "group") == 0) {
1.226 dtucker 656: if (ci == NULL || ci->user == NULL) {
657: result = 0;
658: continue;
659: }
660: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 661: case -1:
662: return -1;
663: case 0:
664: result = 0;
665: }
1.153 dtucker 666: } else if (strcasecmp(attrib, "host") == 0) {
1.226 dtucker 667: if (ci == NULL || ci->host == NULL) {
1.153 dtucker 668: result = 0;
669: continue;
670: }
1.226 dtucker 671: if (match_hostname(ci->host, arg, len) != 1)
1.153 dtucker 672: result = 0;
673: else
674: debug("connection from %.100s matched 'Host "
1.226 dtucker 675: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 676: } else if (strcasecmp(attrib, "address") == 0) {
1.226 dtucker 677: if (ci == NULL || ci->address == NULL) {
678: result = 0;
679: continue;
680: }
681: switch (addr_match_list(ci->address, arg)) {
1.181 djm 682: case 1:
683: debug("connection from %.100s matched 'Address "
1.226 dtucker 684: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 685: break;
686: case 0:
1.183 djm 687: case -1:
1.153 dtucker 688: result = 0;
1.181 djm 689: break;
1.183 djm 690: case -2:
1.181 djm 691: return -1;
1.153 dtucker 692: }
1.226 dtucker 693: } else if (strcasecmp(attrib, "localaddress") == 0){
694: if (ci == NULL || ci->laddress == NULL) {
695: result = 0;
696: continue;
697: }
698: switch (addr_match_list(ci->laddress, arg)) {
699: case 1:
700: debug("connection from %.100s matched "
701: "'LocalAddress %.100s' at line %d",
702: ci->laddress, arg, line);
703: break;
704: case 0:
705: case -1:
706: result = 0;
707: break;
708: case -2:
709: return -1;
710: }
711: } else if (strcasecmp(attrib, "localport") == 0) {
712: if ((port = a2port(arg)) == -1) {
713: error("Invalid LocalPort '%s' on Match line",
714: arg);
715: return -1;
716: }
717: if (ci == NULL || ci->lport == 0) {
718: result = 0;
719: continue;
720: }
721: /* TODO support port lists */
722: if (port == ci->lport)
723: debug("connection from %.100s matched "
724: "'LocalPort %d' at line %d",
725: ci->laddress, port, line);
726: else
727: result = 0;
1.153 dtucker 728: } else {
729: error("Unsupported Match attribute %s", attrib);
730: return -1;
731: }
1.243 dtucker 732: }
733: if (attributes == 0) {
734: error("One or more attributes required for Match");
735: return -1;
1.153 dtucker 736: }
1.226 dtucker 737: if (ci != NULL)
1.153 dtucker 738: debug3("match %sfound", result ? "" : "not ");
739: *condition = cp;
740: return result;
741: }
742:
1.158 dtucker 743: #define WHITESPACE " \t\r\n"
744:
1.220 djm 745: /* Multistate option parsing */
746: struct multistate {
747: char *key;
748: int value;
749: };
750: static const struct multistate multistate_addressfamily[] = {
751: { "inet", AF_INET },
752: { "inet6", AF_INET6 },
753: { "any", AF_UNSPEC },
754: { NULL, -1 }
755: };
756: static const struct multistate multistate_permitrootlogin[] = {
757: { "without-password", PERMIT_NO_PASSWD },
758: { "forced-commands-only", PERMIT_FORCED_ONLY },
759: { "yes", PERMIT_YES },
760: { "no", PERMIT_NO },
761: { NULL, -1 }
762: };
763: static const struct multistate multistate_compression[] = {
764: { "delayed", COMP_DELAYED },
765: { "yes", COMP_ZLIB },
766: { "no", COMP_NONE },
767: { NULL, -1 }
768: };
769: static const struct multistate multistate_gatewayports[] = {
770: { "clientspecified", 2 },
771: { "yes", 1 },
772: { "no", 0 },
773: { NULL, -1 }
774: };
1.222 djm 775: static const struct multistate multistate_privsep[] = {
1.228 djm 776: { "yes", PRIVSEP_NOSANDBOX },
777: { "sandbox", PRIVSEP_ON },
778: { "nosandbox", PRIVSEP_NOSANDBOX },
1.222 djm 779: { "no", PRIVSEP_OFF },
780: { NULL, -1 }
781: };
1.233 djm 782: static const struct multistate multistate_tcpfwd[] = {
783: { "yes", FORWARD_ALLOW },
784: { "all", FORWARD_ALLOW },
785: { "no", FORWARD_DENY },
786: { "remote", FORWARD_REMOTE },
787: { "local", FORWARD_LOCAL },
788: { NULL, -1 }
789: };
1.220 djm 790:
1.94 markus 791: int
792: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 793: const char *filename, int linenum, int *activep,
794: struct connection_info *connectinfo)
1.1 deraadt 795: {
1.238 dtucker 796: char *cp, **charptr, *arg, *p;
1.237 dtucker 797: int cmdline = 0, *intptr, value, value2, n, port;
1.174 dtucker 798: SyslogFacility *log_facility_ptr;
799: LogLevel *log_level_ptr;
1.25 markus 800: ServerOpCodes opcode;
1.153 dtucker 801: u_int i, flags = 0;
1.151 djm 802: size_t len;
1.237 dtucker 803: long long val64;
1.220 djm 804: const struct multistate *multistate_ptr;
1.25 markus 805:
1.94 markus 806: cp = line;
1.148 dtucker 807: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 808: return 0;
1.94 markus 809: /* Ignore leading whitespace */
810: if (*arg == '\0')
811: arg = strdelim(&cp);
812: if (!arg || !*arg || *arg == '#')
813: return 0;
814: intptr = NULL;
815: charptr = NULL;
1.153 dtucker 816: opcode = parse_token(arg, filename, linenum, &flags);
817:
818: if (activep == NULL) { /* We are processing a command line directive */
819: cmdline = 1;
820: activep = &cmdline;
821: }
822: if (*activep && opcode != sMatch)
823: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
824: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 825: if (connectinfo == NULL) {
1.153 dtucker 826: fatal("%s line %d: Directive '%s' is not allowed "
827: "within a Match block", filename, linenum, arg);
828: } else { /* this is a directive we have already processed */
829: while (arg)
830: arg = strdelim(&cp);
831: return 0;
832: }
833: }
834:
1.94 markus 835: switch (opcode) {
836: case sBadOption:
837: return -1;
838: case sPort:
839: /* ignore ports from configfile if cmdline specifies ports */
840: if (options->ports_from_cmdline)
841: return 0;
842: if (options->listen_addrs != NULL)
843: fatal("%s line %d: ports must be specified before "
1.98 stevesk 844: "ListenAddress.", filename, linenum);
1.94 markus 845: if (options->num_ports >= MAX_PORTS)
846: fatal("%s line %d: too many ports.",
847: filename, linenum);
1.48 provos 848: arg = strdelim(&cp);
1.94 markus 849: if (!arg || *arg == '\0')
850: fatal("%s line %d: missing port number.",
851: filename, linenum);
852: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 853: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 854: fatal("%s line %d: Badly formatted port number.",
855: filename, linenum);
856: break;
1.29 markus 857:
1.94 markus 858: case sServerKeyBits:
859: intptr = &options->server_key_bits;
1.180 djm 860: parse_int:
1.94 markus 861: arg = strdelim(&cp);
862: if (!arg || *arg == '\0')
863: fatal("%s line %d: missing integer value.",
864: filename, linenum);
865: value = atoi(arg);
1.153 dtucker 866: if (*activep && *intptr == -1)
1.94 markus 867: *intptr = value;
868: break;
1.25 markus 869:
1.94 markus 870: case sLoginGraceTime:
871: intptr = &options->login_grace_time;
1.180 djm 872: parse_time:
1.94 markus 873: arg = strdelim(&cp);
874: if (!arg || *arg == '\0')
875: fatal("%s line %d: missing time value.",
876: filename, linenum);
877: if ((value = convtime(arg)) == -1)
878: fatal("%s line %d: invalid time value.",
879: filename, linenum);
880: if (*intptr == -1)
881: *intptr = value;
882: break;
883:
884: case sKeyRegenerationTime:
885: intptr = &options->key_regeneration_time;
886: goto parse_time;
887:
888: case sListenAddress:
889: arg = strdelim(&cp);
1.139 djm 890: if (arg == NULL || *arg == '\0')
891: fatal("%s line %d: missing address",
1.94 markus 892: filename, linenum);
1.144 dtucker 893: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
894: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
895: && strchr(p+1, ':') != NULL) {
896: add_listen_addr(options, arg, 0);
897: break;
898: }
1.139 djm 899: p = hpdelim(&arg);
900: if (p == NULL)
901: fatal("%s line %d: bad address:port usage",
902: filename, linenum);
903: p = cleanhostname(p);
904: if (arg == NULL)
905: port = 0;
1.194 djm 906: else if ((port = a2port(arg)) <= 0)
1.139 djm 907: fatal("%s line %d: bad port number", filename, linenum);
908:
909: add_listen_addr(options, p, port);
1.25 markus 910:
1.138 djm 911: break;
912:
913: case sAddressFamily:
1.220 djm 914: intptr = &options->address_family;
915: multistate_ptr = multistate_addressfamily;
916: if (options->listen_addrs != NULL)
917: fatal("%s line %d: address family must be specified "
918: "before ListenAddress.", filename, linenum);
919: parse_multistate:
1.138 djm 920: arg = strdelim(&cp);
1.141 markus 921: if (!arg || *arg == '\0')
1.220 djm 922: fatal("%s line %d: missing argument.",
1.141 markus 923: filename, linenum);
1.220 djm 924: value = -1;
925: for (i = 0; multistate_ptr[i].key != NULL; i++) {
926: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
927: value = multistate_ptr[i].value;
928: break;
929: }
930: }
931: if (value == -1)
932: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 933: filename, linenum, arg);
1.220 djm 934: if (*activep && *intptr == -1)
1.138 djm 935: *intptr = value;
1.94 markus 936: break;
937:
938: case sHostKeyFile:
939: intptr = &options->num_host_key_files;
940: if (*intptr >= MAX_HOSTKEYS)
941: fatal("%s line %d: too many host keys specified (max %d).",
942: filename, linenum, MAX_HOSTKEYS);
943: charptr = &options->host_key_files[*intptr];
1.180 djm 944: parse_filename:
1.94 markus 945: arg = strdelim(&cp);
946: if (!arg || *arg == '\0')
947: fatal("%s line %d: missing file name.",
948: filename, linenum);
1.153 dtucker 949: if (*activep && *charptr == NULL) {
1.202 djm 950: *charptr = derelativise_path(arg);
1.94 markus 951: /* increase optional counter */
952: if (intptr != NULL)
953: *intptr = *intptr + 1;
954: }
955: break;
1.76 stevesk 956:
1.240 markus 957: case sHostKeyAgent:
958: charptr = &options->host_key_agent;
959: arg = strdelim(&cp);
960: if (!arg || *arg == '\0')
961: fatal("%s line %d: missing socket name.",
962: filename, linenum);
963: if (*activep && *charptr == NULL)
964: *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
965: xstrdup(arg) : derelativise_path(arg);
966: break;
967:
1.203 djm 968: case sHostCertificate:
969: intptr = &options->num_host_cert_files;
970: if (*intptr >= MAX_HOSTKEYS)
971: fatal("%s line %d: too many host certificates "
972: "specified (max %d).", filename, linenum,
973: MAX_HOSTCERTS);
974: charptr = &options->host_cert_files[*intptr];
975: goto parse_filename;
976: break;
977:
1.94 markus 978: case sPidFile:
979: charptr = &options->pid_file;
980: goto parse_filename;
1.25 markus 981:
1.94 markus 982: case sPermitRootLogin:
983: intptr = &options->permit_root_login;
1.220 djm 984: multistate_ptr = multistate_permitrootlogin;
985: goto parse_multistate;
1.36 markus 986:
1.94 markus 987: case sIgnoreRhosts:
988: intptr = &options->ignore_rhosts;
1.180 djm 989: parse_flag:
1.94 markus 990: arg = strdelim(&cp);
991: if (!arg || *arg == '\0')
992: fatal("%s line %d: missing yes/no argument.",
993: filename, linenum);
994: value = 0; /* silence compiler */
995: if (strcmp(arg, "yes") == 0)
996: value = 1;
997: else if (strcmp(arg, "no") == 0)
998: value = 0;
999: else
1000: fatal("%s line %d: Bad yes/no argument: %s",
1001: filename, linenum, arg);
1.153 dtucker 1002: if (*activep && *intptr == -1)
1.94 markus 1003: *intptr = value;
1004: break;
1005:
1006: case sIgnoreUserKnownHosts:
1007: intptr = &options->ignore_user_known_hosts;
1008: goto parse_flag;
1009:
1010: case sRhostsRSAAuthentication:
1011: intptr = &options->rhosts_rsa_authentication;
1012: goto parse_flag;
1013:
1014: case sHostbasedAuthentication:
1015: intptr = &options->hostbased_authentication;
1016: goto parse_flag;
1017:
1018: case sHostbasedUsesNameFromPacketOnly:
1019: intptr = &options->hostbased_uses_name_from_packet_only;
1020: goto parse_flag;
1021:
1022: case sRSAAuthentication:
1023: intptr = &options->rsa_authentication;
1024: goto parse_flag;
1025:
1026: case sPubkeyAuthentication:
1027: intptr = &options->pubkey_authentication;
1028: goto parse_flag;
1.119 jakob 1029:
1.94 markus 1030: case sKerberosAuthentication:
1031: intptr = &options->kerberos_authentication;
1032: goto parse_flag;
1033:
1034: case sKerberosOrLocalPasswd:
1035: intptr = &options->kerberos_or_local_passwd;
1036: goto parse_flag;
1037:
1038: case sKerberosTicketCleanup:
1039: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1040: goto parse_flag;
1041:
1042: case sKerberosGetAFSToken:
1043: intptr = &options->kerberos_get_afs_token;
1.125 markus 1044: goto parse_flag;
1045:
1046: case sGssAuthentication:
1047: intptr = &options->gss_authentication;
1048: goto parse_flag;
1049:
1050: case sGssCleanupCreds:
1051: intptr = &options->gss_cleanup_creds;
1.94 markus 1052: goto parse_flag;
1053:
1054: case sPasswordAuthentication:
1055: intptr = &options->password_authentication;
1056: goto parse_flag;
1057:
1.190 djm 1058: case sZeroKnowledgePasswordAuthentication:
1059: intptr = &options->zero_knowledge_password_authentication;
1060: goto parse_flag;
1061:
1.94 markus 1062: case sKbdInteractiveAuthentication:
1063: intptr = &options->kbd_interactive_authentication;
1064: goto parse_flag;
1065:
1066: case sChallengeResponseAuthentication:
1067: intptr = &options->challenge_response_authentication;
1068: goto parse_flag;
1069:
1070: case sPrintMotd:
1071: intptr = &options->print_motd;
1072: goto parse_flag;
1073:
1074: case sPrintLastLog:
1075: intptr = &options->print_lastlog;
1076: goto parse_flag;
1077:
1078: case sX11Forwarding:
1079: intptr = &options->x11_forwarding;
1080: goto parse_flag;
1081:
1082: case sX11DisplayOffset:
1083: intptr = &options->x11_display_offset;
1084: goto parse_int;
1.99 stevesk 1085:
1086: case sX11UseLocalhost:
1087: intptr = &options->x11_use_localhost;
1088: goto parse_flag;
1.94 markus 1089:
1090: case sXAuthLocation:
1091: charptr = &options->xauth_location;
1092: goto parse_filename;
1093:
1.244 djm 1094: case sPermitTTY:
1095: intptr = &options->permit_tty;
1096: goto parse_flag;
1097:
1.94 markus 1098: case sStrictModes:
1099: intptr = &options->strict_modes;
1100: goto parse_flag;
1101:
1.129 markus 1102: case sTCPKeepAlive:
1103: intptr = &options->tcp_keep_alive;
1.94 markus 1104: goto parse_flag;
1105:
1106: case sEmptyPasswd:
1107: intptr = &options->permit_empty_passwd;
1.113 markus 1108: goto parse_flag;
1109:
1110: case sPermitUserEnvironment:
1111: intptr = &options->permit_user_env;
1.94 markus 1112: goto parse_flag;
1113:
1114: case sUseLogin:
1115: intptr = &options->use_login;
1.111 markus 1116: goto parse_flag;
1117:
1118: case sCompression:
1119: intptr = &options->compression;
1.220 djm 1120: multistate_ptr = multistate_compression;
1121: goto parse_multistate;
1.94 markus 1122:
1.235 dtucker 1123: case sRekeyLimit:
1124: arg = strdelim(&cp);
1125: if (!arg || *arg == '\0')
1126: fatal("%.200s line %d: Missing argument.", filename,
1127: linenum);
1128: if (strcmp(arg, "default") == 0) {
1129: val64 = 0;
1130: } else {
1.236 dtucker 1131: if (scan_scaled(arg, &val64) == -1)
1132: fatal("%.200s line %d: Bad number '%s': %s",
1133: filename, linenum, arg, strerror(errno));
1134: /* check for too-large or too-small limits */
1135: if (val64 > UINT_MAX)
1.235 dtucker 1136: fatal("%.200s line %d: RekeyLimit too large",
1137: filename, linenum);
1138: if (val64 != 0 && val64 < 16)
1139: fatal("%.200s line %d: RekeyLimit too small",
1140: filename, linenum);
1141: }
1142: if (*activep && options->rekey_limit == -1)
1143: options->rekey_limit = (u_int32_t)val64;
1144: if (cp != NULL) { /* optional rekey interval present */
1145: if (strcmp(cp, "none") == 0) {
1146: (void)strdelim(&cp); /* discard */
1147: break;
1148: }
1149: intptr = &options->rekey_interval;
1150: goto parse_time;
1151: }
1152: break;
1153:
1.94 markus 1154: case sGatewayPorts:
1155: intptr = &options->gateway_ports;
1.220 djm 1156: multistate_ptr = multistate_gatewayports;
1157: goto parse_multistate;
1.25 markus 1158:
1.122 markus 1159: case sUseDNS:
1160: intptr = &options->use_dns;
1.94 markus 1161: goto parse_flag;
1.53 markus 1162:
1.94 markus 1163: case sLogFacility:
1.174 dtucker 1164: log_facility_ptr = &options->log_facility;
1.94 markus 1165: arg = strdelim(&cp);
1166: value = log_facility_number(arg);
1.101 markus 1167: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1168: fatal("%.200s line %d: unsupported log facility '%s'",
1169: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1170: if (*log_facility_ptr == -1)
1171: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1172: break;
1.25 markus 1173:
1.94 markus 1174: case sLogLevel:
1.174 dtucker 1175: log_level_ptr = &options->log_level;
1.94 markus 1176: arg = strdelim(&cp);
1177: value = log_level_number(arg);
1.101 markus 1178: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1179: fatal("%.200s line %d: unsupported log level '%s'",
1180: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1181: if (*log_level_ptr == -1)
1182: *log_level_ptr = (LogLevel) value;
1.94 markus 1183: break;
1184:
1185: case sAllowTcpForwarding:
1186: intptr = &options->allow_tcp_forwarding;
1.233 djm 1187: multistate_ptr = multistate_tcpfwd;
1188: goto parse_multistate;
1.102 provos 1189:
1.178 pyr 1190: case sAllowAgentForwarding:
1191: intptr = &options->allow_agent_forwarding;
1192: goto parse_flag;
1193:
1.102 provos 1194: case sUsePrivilegeSeparation:
1195: intptr = &use_privsep;
1.222 djm 1196: multistate_ptr = multistate_privsep;
1197: goto parse_multistate;
1.94 markus 1198:
1199: case sAllowUsers:
1200: while ((arg = strdelim(&cp)) && *arg != '\0') {
1201: if (options->num_allow_users >= MAX_ALLOW_USERS)
1202: fatal("%s line %d: too many allow users.",
1203: filename, linenum);
1.227 markus 1204: if (!*activep)
1205: continue;
1.112 deraadt 1206: options->allow_users[options->num_allow_users++] =
1207: xstrdup(arg);
1.94 markus 1208: }
1209: break;
1.25 markus 1210:
1.94 markus 1211: case sDenyUsers:
1212: while ((arg = strdelim(&cp)) && *arg != '\0') {
1213: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 stevesk 1214: fatal("%s line %d: too many deny users.",
1.94 markus 1215: filename, linenum);
1.227 markus 1216: if (!*activep)
1217: continue;
1.112 deraadt 1218: options->deny_users[options->num_deny_users++] =
1219: xstrdup(arg);
1.94 markus 1220: }
1221: break;
1.25 markus 1222:
1.94 markus 1223: case sAllowGroups:
1224: while ((arg = strdelim(&cp)) && *arg != '\0') {
1225: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1226: fatal("%s line %d: too many allow groups.",
1227: filename, linenum);
1.227 markus 1228: if (!*activep)
1229: continue;
1.112 deraadt 1230: options->allow_groups[options->num_allow_groups++] =
1231: xstrdup(arg);
1.94 markus 1232: }
1233: break;
1.33 markus 1234:
1.94 markus 1235: case sDenyGroups:
1236: while ((arg = strdelim(&cp)) && *arg != '\0') {
1237: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1238: fatal("%s line %d: too many deny groups.",
1239: filename, linenum);
1.227 markus 1240: if (!*activep)
1241: continue;
1242: options->deny_groups[options->num_deny_groups++] =
1243: xstrdup(arg);
1.94 markus 1244: }
1245: break;
1.66 markus 1246:
1.94 markus 1247: case sCiphers:
1248: arg = strdelim(&cp);
1249: if (!arg || *arg == '\0')
1250: fatal("%s line %d: Missing argument.", filename, linenum);
1251: if (!ciphers_valid(arg))
1252: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1253: filename, linenum, arg ? arg : "<NONE>");
1254: if (options->ciphers == NULL)
1255: options->ciphers = xstrdup(arg);
1256: break;
1.33 markus 1257:
1.94 markus 1258: case sMacs:
1259: arg = strdelim(&cp);
1260: if (!arg || *arg == '\0')
1261: fatal("%s line %d: Missing argument.", filename, linenum);
1262: if (!mac_valid(arg))
1263: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1264: filename, linenum, arg ? arg : "<NONE>");
1265: if (options->macs == NULL)
1266: options->macs = xstrdup(arg);
1.211 djm 1267: break;
1268:
1269: case sKexAlgorithms:
1270: arg = strdelim(&cp);
1271: if (!arg || *arg == '\0')
1272: fatal("%s line %d: Missing argument.",
1273: filename, linenum);
1274: if (!kex_names_valid(arg))
1275: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1276: filename, linenum, arg ? arg : "<NONE>");
1277: if (options->kex_algorithms == NULL)
1278: options->kex_algorithms = xstrdup(arg);
1.94 markus 1279: break;
1.43 jakob 1280:
1.94 markus 1281: case sProtocol:
1282: intptr = &options->protocol;
1283: arg = strdelim(&cp);
1284: if (!arg || *arg == '\0')
1285: fatal("%s line %d: Missing argument.", filename, linenum);
1286: value = proto_spec(arg);
1287: if (value == SSH_PROTO_UNKNOWN)
1288: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 1289: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 1290: if (*intptr == SSH_PROTO_UNKNOWN)
1291: *intptr = value;
1292: break;
1293:
1294: case sSubsystem:
1295: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1296: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1297: filename, linenum);
1.94 markus 1298: }
1299: arg = strdelim(&cp);
1300: if (!arg || *arg == '\0')
1301: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1302: filename, linenum);
1.153 dtucker 1303: if (!*activep) {
1304: arg = strdelim(&cp);
1305: break;
1306: }
1.94 markus 1307: for (i = 0; i < options->num_subsystems; i++)
1308: if (strcmp(arg, options->subsystem_name[i]) == 0)
1309: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1310: filename, linenum, arg);
1.94 markus 1311: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1312: arg = strdelim(&cp);
1313: if (!arg || *arg == '\0')
1314: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1315: filename, linenum);
1.94 markus 1316: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1317:
1318: /* Collect arguments (separate to executable) */
1319: p = xstrdup(arg);
1320: len = strlen(p) + 1;
1321: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1322: len += 1 + strlen(arg);
1323: p = xrealloc(p, 1, len);
1324: strlcat(p, " ", len);
1325: strlcat(p, arg, len);
1326: }
1327: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1328: options->num_subsystems++;
1329: break;
1.46 markus 1330:
1.94 markus 1331: case sMaxStartups:
1332: arg = strdelim(&cp);
1333: if (!arg || *arg == '\0')
1334: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1335: filename, linenum);
1.94 markus 1336: if ((n = sscanf(arg, "%d:%d:%d",
1337: &options->max_startups_begin,
1338: &options->max_startups_rate,
1339: &options->max_startups)) == 3) {
1340: if (options->max_startups_begin >
1341: options->max_startups ||
1342: options->max_startups_rate > 100 ||
1343: options->max_startups_rate < 1)
1.50 markus 1344: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1345: filename, linenum);
1.94 markus 1346: } else if (n != 1)
1347: fatal("%s line %d: Illegal MaxStartups spec.",
1348: filename, linenum);
1349: else
1350: options->max_startups = options->max_startups_begin;
1351: break;
1.133 dtucker 1352:
1353: case sMaxAuthTries:
1354: intptr = &options->max_authtries;
1355: goto parse_int;
1.94 markus 1356:
1.180 djm 1357: case sMaxSessions:
1358: intptr = &options->max_sessions;
1359: goto parse_int;
1360:
1.94 markus 1361: case sBanner:
1362: charptr = &options->banner;
1363: goto parse_filename;
1.176 djm 1364:
1.94 markus 1365: /*
1366: * These options can contain %X options expanded at
1367: * connect time, so that you can specify paths like:
1368: *
1369: * AuthorizedKeysFile /etc/ssh_keys/%u
1370: */
1371: case sAuthorizedKeysFile:
1.219 djm 1372: if (*activep && options->num_authkeys_files == 0) {
1373: while ((arg = strdelim(&cp)) && *arg != '\0') {
1374: if (options->num_authkeys_files >=
1375: MAX_AUTHKEYS_FILES)
1376: fatal("%s line %d: "
1377: "too many authorized keys files.",
1378: filename, linenum);
1379: options->authorized_keys_files[
1380: options->num_authkeys_files++] =
1381: tilde_expand_filename(arg, getuid());
1382: }
1383: }
1384: return 0;
1385:
1.208 djm 1386: case sAuthorizedPrincipalsFile:
1387: charptr = &options->authorized_principals_file;
1.205 djm 1388: arg = strdelim(&cp);
1389: if (!arg || *arg == '\0')
1390: fatal("%s line %d: missing file name.",
1391: filename, linenum);
1392: if (*activep && *charptr == NULL) {
1.206 markus 1393: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1394: /* increase optional counter */
1395: if (intptr != NULL)
1396: *intptr = *intptr + 1;
1397: }
1398: break;
1.94 markus 1399:
1400: case sClientAliveInterval:
1401: intptr = &options->client_alive_interval;
1402: goto parse_time;
1403:
1404: case sClientAliveCountMax:
1405: intptr = &options->client_alive_count_max;
1406: goto parse_int;
1.131 djm 1407:
1408: case sAcceptEnv:
1409: while ((arg = strdelim(&cp)) && *arg != '\0') {
1410: if (strchr(arg, '=') != NULL)
1411: fatal("%s line %d: Invalid environment name.",
1412: filename, linenum);
1413: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1414: fatal("%s line %d: too many allow env.",
1415: filename, linenum);
1.153 dtucker 1416: if (!*activep)
1.227 markus 1417: continue;
1.131 djm 1418: options->accept_env[options->num_accept_env++] =
1419: xstrdup(arg);
1420: }
1421: break;
1.145 reyk 1422:
1423: case sPermitTunnel:
1424: intptr = &options->permit_tun;
1.146 reyk 1425: arg = strdelim(&cp);
1426: if (!arg || *arg == '\0')
1427: fatal("%s line %d: Missing yes/point-to-point/"
1428: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1429: value = -1;
1430: for (i = 0; tunmode_desc[i].val != -1; i++)
1431: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1432: value = tunmode_desc[i].val;
1433: break;
1434: }
1435: if (value == -1)
1.146 reyk 1436: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1437: "no argument: %s", filename, linenum, arg);
1438: if (*intptr == -1)
1439: *intptr = value;
1440: break;
1.94 markus 1441:
1.153 dtucker 1442: case sMatch:
1443: if (cmdline)
1444: fatal("Match directive not supported as a command-line "
1445: "option");
1.226 dtucker 1446: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1447: if (value < 0)
1448: fatal("%s line %d: Bad Match condition", filename,
1449: linenum);
1450: *activep = value;
1.156 dtucker 1451: break;
1452:
1453: case sPermitOpen:
1454: arg = strdelim(&cp);
1455: if (!arg || *arg == '\0')
1456: fatal("%s line %d: missing PermitOpen specification",
1457: filename, linenum);
1.167 dtucker 1458: n = options->num_permitted_opens; /* modified later */
1.156 dtucker 1459: if (strcmp(arg, "any") == 0) {
1.167 dtucker 1460: if (*activep && n == -1) {
1.156 dtucker 1461: channel_clear_adm_permitted_opens();
1.159 dtucker 1462: options->num_permitted_opens = 0;
1.224 dtucker 1463: }
1464: break;
1465: }
1466: if (strcmp(arg, "none") == 0) {
1467: if (*activep && n == -1) {
1468: options->num_permitted_opens = 1;
1469: channel_disable_adm_local_opens();
1.159 dtucker 1470: }
1.156 dtucker 1471: break;
1472: }
1.166 dtucker 1473: if (*activep && n == -1)
1474: channel_clear_adm_permitted_opens();
1.159 dtucker 1475: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1476: p = hpdelim(&arg);
1477: if (p == NULL)
1478: fatal("%s line %d: missing host in PermitOpen",
1479: filename, linenum);
1480: p = cleanhostname(p);
1.223 dtucker 1481: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1482: fatal("%s line %d: bad port number in "
1483: "PermitOpen", filename, linenum);
1.166 dtucker 1484: if (*activep && n == -1)
1.159 dtucker 1485: options->num_permitted_opens =
1486: channel_add_adm_permitted_opens(p, port);
1487: }
1.153 dtucker 1488: break;
1489:
1.158 dtucker 1490: case sForceCommand:
1491: if (cp == NULL)
1492: fatal("%.200s line %d: Missing argument.", filename,
1493: linenum);
1494: len = strspn(cp, WHITESPACE);
1495: if (*activep && options->adm_forced_command == NULL)
1496: options->adm_forced_command = xstrdup(cp + len);
1497: return 0;
1498:
1.176 djm 1499: case sChrootDirectory:
1500: charptr = &options->chroot_directory;
1.177 djm 1501:
1502: arg = strdelim(&cp);
1503: if (!arg || *arg == '\0')
1504: fatal("%s line %d: missing file name.",
1505: filename, linenum);
1506: if (*activep && *charptr == NULL)
1507: *charptr = xstrdup(arg);
1508: break;
1.176 djm 1509:
1.204 djm 1510: case sTrustedUserCAKeys:
1511: charptr = &options->trusted_user_ca_keys;
1512: goto parse_filename;
1513:
1514: case sRevokedKeys:
1515: charptr = &options->revoked_keys_file;
1516: goto parse_filename;
1517:
1.213 djm 1518: case sIPQoS:
1519: arg = strdelim(&cp);
1520: if ((value = parse_ipqos(arg)) == -1)
1521: fatal("%s line %d: Bad IPQoS value: %s",
1522: filename, linenum, arg);
1523: arg = strdelim(&cp);
1524: if (arg == NULL)
1525: value2 = value;
1526: else if ((value2 = parse_ipqos(arg)) == -1)
1527: fatal("%s line %d: Bad IPQoS value: %s",
1528: filename, linenum, arg);
1529: if (*activep) {
1530: options->ip_qos_interactive = value;
1531: options->ip_qos_bulk = value2;
1532: }
1533: break;
1534:
1.225 djm 1535: case sVersionAddendum:
1536: if (cp == NULL)
1537: fatal("%.200s line %d: Missing argument.", filename,
1538: linenum);
1539: len = strspn(cp, WHITESPACE);
1540: if (*activep && options->version_addendum == NULL) {
1541: if (strcasecmp(cp + len, "none") == 0)
1542: options->version_addendum = xstrdup("");
1543: else if (strchr(cp + len, '\r') != NULL)
1544: fatal("%.200s line %d: Invalid argument",
1545: filename, linenum);
1546: else
1547: options->version_addendum = xstrdup(cp + len);
1548: }
1549: return 0;
1550:
1.231 djm 1551: case sAuthorizedKeysCommand:
1552: len = strspn(cp, WHITESPACE);
1553: if (*activep && options->authorized_keys_command == NULL) {
1554: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1555: fatal("%.200s line %d: AuthorizedKeysCommand "
1556: "must be an absolute path",
1557: filename, linenum);
1558: options->authorized_keys_command = xstrdup(cp + len);
1559: }
1560: return 0;
1561:
1562: case sAuthorizedKeysCommandUser:
1563: charptr = &options->authorized_keys_command_user;
1564:
1565: arg = strdelim(&cp);
1566: if (*activep && *charptr == NULL)
1567: *charptr = xstrdup(arg);
1568: break;
1569:
1.232 djm 1570: case sAuthenticationMethods:
1571: if (*activep && options->num_auth_methods == 0) {
1572: while ((arg = strdelim(&cp)) && *arg != '\0') {
1573: if (options->num_auth_methods >=
1574: MAX_AUTH_METHODS)
1575: fatal("%s line %d: "
1576: "too many authentication methods.",
1577: filename, linenum);
1578: if (auth2_methods_valid(arg, 0) != 0)
1579: fatal("%s line %d: invalid "
1580: "authentication method list.",
1581: filename, linenum);
1582: options->auth_methods[
1583: options->num_auth_methods++] = xstrdup(arg);
1584: }
1585: }
1586: return 0;
1587:
1.94 markus 1588: case sDeprecated:
1.117 itojun 1589: logit("%s line %d: Deprecated option %s",
1.121 jakob 1590: filename, linenum, arg);
1591: while (arg)
1592: arg = strdelim(&cp);
1593: break;
1594:
1595: case sUnsupported:
1596: logit("%s line %d: Unsupported option %s",
1.94 markus 1597: filename, linenum, arg);
1598: while (arg)
1599: arg = strdelim(&cp);
1600: break;
1601:
1602: default:
1603: fatal("%s line %d: Missing handler for opcode %s (%d)",
1604: filename, linenum, arg, opcode);
1605: }
1606: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1607: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1608: filename, linenum, arg);
1609: return 0;
1610: }
1611:
1612: /* Reads the server configuration file. */
1.25 markus 1613:
1.94 markus 1614: void
1.134 djm 1615: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1616: {
1.229 dtucker 1617: char line[4096], *cp;
1.94 markus 1618: FILE *f;
1.229 dtucker 1619: int lineno = 0;
1.81 stevesk 1620:
1.134 djm 1621: debug2("%s: filename %s", __func__, filename);
1622: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1623: perror(filename);
1624: exit(1);
1625: }
1.134 djm 1626: buffer_clear(conf);
1627: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 1628: lineno++;
1629: if (strlen(line) == sizeof(line) - 1)
1630: fatal("%s line %d too long", filename, lineno);
1.134 djm 1631: /*
1632: * Trim out comments and strip whitespace
1.135 deraadt 1633: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1634: * line numbers later for error messages
1635: */
1636: if ((cp = strchr(line, '#')) != NULL)
1637: memcpy(cp, "\n", 2);
1638: cp = line + strspn(line, " \t\r");
1639:
1640: buffer_append(conf, cp, strlen(cp));
1641: }
1642: buffer_append(conf, "\0", 1);
1643: fclose(f);
1644: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1645: }
1646:
1647: void
1.226 dtucker 1648: parse_server_match_config(ServerOptions *options,
1649: struct connection_info *connectinfo)
1.153 dtucker 1650: {
1651: ServerOptions mo;
1652:
1653: initialize_server_options(&mo);
1.226 dtucker 1654: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 1655: copy_set_server_options(options, &mo, 0);
1.153 dtucker 1656: }
1657:
1.226 dtucker 1658: int parse_server_match_testspec(struct connection_info *ci, char *spec)
1659: {
1660: char *p;
1661:
1662: while ((p = strsep(&spec, ",")) && *p != '\0') {
1663: if (strncmp(p, "addr=", 5) == 0) {
1664: ci->address = xstrdup(p + 5);
1665: } else if (strncmp(p, "host=", 5) == 0) {
1666: ci->host = xstrdup(p + 5);
1667: } else if (strncmp(p, "user=", 5) == 0) {
1668: ci->user = xstrdup(p + 5);
1669: } else if (strncmp(p, "laddr=", 6) == 0) {
1670: ci->laddress = xstrdup(p + 6);
1671: } else if (strncmp(p, "lport=", 6) == 0) {
1672: ci->lport = a2port(p + 6);
1673: if (ci->lport == -1) {
1674: fprintf(stderr, "Invalid port '%s' in test mode"
1675: " specification %s\n", p+6, p);
1676: return -1;
1677: }
1678: } else {
1679: fprintf(stderr, "Invalid test mode specification %s\n",
1680: p);
1681: return -1;
1682: }
1683: }
1684: return 0;
1685: }
1686:
1687: /*
1688: * returns 1 for a complete spec, 0 for partial spec and -1 for an
1689: * empty spec.
1690: */
1691: int server_match_spec_complete(struct connection_info *ci)
1692: {
1693: if (ci->user && ci->host && ci->address)
1694: return 1; /* complete */
1695: if (!ci->user && !ci->host && !ci->address)
1696: return -1; /* empty */
1697: return 0; /* partial */
1698: }
1699:
1.168 dtucker 1700: /*
1701: * Copy any supported values that are set.
1702: *
1.195 jj 1703: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 1704: * array values that are not used pre-authentication, because any that we
1705: * do use must be explictly sent in mm_getpwnamallow().
1706: */
1.153 dtucker 1707: void
1.168 dtucker 1708: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 1709: {
1.247 djm 1710: #define M_CP_INTOPT(n) do {\
1711: if (src->n != -1) \
1712: dst->n = src->n; \
1713: } while (0)
1714:
1.168 dtucker 1715: M_CP_INTOPT(password_authentication);
1716: M_CP_INTOPT(gss_authentication);
1717: M_CP_INTOPT(rsa_authentication);
1718: M_CP_INTOPT(pubkey_authentication);
1719: M_CP_INTOPT(kerberos_authentication);
1720: M_CP_INTOPT(hostbased_authentication);
1.209 djm 1721: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 1722: M_CP_INTOPT(kbd_interactive_authentication);
1.190 djm 1723: M_CP_INTOPT(zero_knowledge_password_authentication);
1.175 dtucker 1724: M_CP_INTOPT(permit_root_login);
1.188 djm 1725: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 1726:
1727: M_CP_INTOPT(allow_tcp_forwarding);
1.178 pyr 1728: M_CP_INTOPT(allow_agent_forwarding);
1.209 djm 1729: M_CP_INTOPT(permit_tun);
1.168 dtucker 1730: M_CP_INTOPT(gateway_ports);
1731: M_CP_INTOPT(x11_display_offset);
1732: M_CP_INTOPT(x11_forwarding);
1733: M_CP_INTOPT(x11_use_localhost);
1.244 djm 1734: M_CP_INTOPT(permit_tty);
1.180 djm 1735: M_CP_INTOPT(max_sessions);
1.184 dtucker 1736: M_CP_INTOPT(max_authtries);
1.213 djm 1737: M_CP_INTOPT(ip_qos_interactive);
1738: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 1739: M_CP_INTOPT(rekey_limit);
1740: M_CP_INTOPT(rekey_interval);
1.247 djm 1741:
1742: /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
1743: #define M_CP_STROPT(n) do {\
1744: if (src->n != NULL && dst->n != src->n) { \
1745: free(dst->n); \
1746: dst->n = src->n; \
1747: } \
1748: } while(0)
1749: #define M_CP_STRARRAYOPT(n, num_n) do {\
1750: if (src->num_n != 0) { \
1751: for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \
1752: dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \
1753: } \
1754: } while(0)
1.168 dtucker 1755:
1.218 djm 1756: /* See comment in servconf.h */
1757: COPY_MATCH_STRING_OPTS();
1.216 djm 1758:
1.217 dtucker 1759: /*
1760: * The only things that should be below this point are string options
1761: * which are only used after authentication.
1762: */
1.168 dtucker 1763: if (preauth)
1764: return;
1.219 djm 1765:
1.168 dtucker 1766: M_CP_STROPT(adm_forced_command);
1.176 djm 1767: M_CP_STROPT(chroot_directory);
1.153 dtucker 1768: }
1.168 dtucker 1769:
1770: #undef M_CP_INTOPT
1771: #undef M_CP_STROPT
1.219 djm 1772: #undef M_CP_STRARRAYOPT
1.153 dtucker 1773:
1774: void
1775: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 1776: struct connection_info *connectinfo)
1.134 djm 1777: {
1.153 dtucker 1778: int active, linenum, bad_options = 0;
1.136 dtucker 1779: char *cp, *obuf, *cbuf;
1.134 djm 1780:
1781: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1782:
1.136 dtucker 1783: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.226 dtucker 1784: active = connectinfo ? 0 : 1;
1.137 dtucker 1785: linenum = 1;
1.140 deraadt 1786: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1787: if (process_server_config_line(options, cp, filename,
1.226 dtucker 1788: linenum++, &active, connectinfo) != 0)
1.94 markus 1789: bad_options++;
1.1 deraadt 1790: }
1.239 djm 1791: free(obuf);
1.78 stevesk 1792: if (bad_options > 0)
1793: fatal("%s: terminating, %d bad configuration options",
1794: filename, bad_options);
1.182 dtucker 1795: }
1796:
1797: static const char *
1.221 djm 1798: fmt_multistate_int(int val, const struct multistate *m)
1799: {
1800: u_int i;
1801:
1802: for (i = 0; m[i].key != NULL; i++) {
1803: if (m[i].value == val)
1804: return m[i].key;
1805: }
1806: return "UNKNOWN";
1807: }
1808:
1809: static const char *
1.182 dtucker 1810: fmt_intarg(ServerOpCodes code, int val)
1811: {
1.221 djm 1812: if (val == -1)
1813: return "unset";
1814: switch (code) {
1815: case sAddressFamily:
1816: return fmt_multistate_int(val, multistate_addressfamily);
1817: case sPermitRootLogin:
1818: return fmt_multistate_int(val, multistate_permitrootlogin);
1819: case sGatewayPorts:
1820: return fmt_multistate_int(val, multistate_gatewayports);
1821: case sCompression:
1822: return fmt_multistate_int(val, multistate_compression);
1.222 djm 1823: case sUsePrivilegeSeparation:
1824: return fmt_multistate_int(val, multistate_privsep);
1.233 djm 1825: case sAllowTcpForwarding:
1826: return fmt_multistate_int(val, multistate_tcpfwd);
1.221 djm 1827: case sProtocol:
1.182 dtucker 1828: switch (val) {
1829: case SSH_PROTO_1:
1830: return "1";
1831: case SSH_PROTO_2:
1832: return "2";
1833: case (SSH_PROTO_1|SSH_PROTO_2):
1834: return "2,1";
1835: default:
1836: return "UNKNOWN";
1837: }
1.221 djm 1838: default:
1839: switch (val) {
1840: case 0:
1841: return "no";
1842: case 1:
1843: return "yes";
1844: default:
1845: return "UNKNOWN";
1846: }
1.182 dtucker 1847: }
1848: }
1849:
1850: static const char *
1851: lookup_opcode_name(ServerOpCodes code)
1852: {
1853: u_int i;
1854:
1855: for (i = 0; keywords[i].name != NULL; i++)
1856: if (keywords[i].opcode == code)
1857: return(keywords[i].name);
1858: return "UNKNOWN";
1859: }
1860:
1861: static void
1862: dump_cfg_int(ServerOpCodes code, int val)
1863: {
1864: printf("%s %d\n", lookup_opcode_name(code), val);
1865: }
1866:
1867: static void
1868: dump_cfg_fmtint(ServerOpCodes code, int val)
1869: {
1870: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
1871: }
1872:
1873: static void
1874: dump_cfg_string(ServerOpCodes code, const char *val)
1875: {
1876: if (val == NULL)
1877: return;
1878: printf("%s %s\n", lookup_opcode_name(code), val);
1879: }
1880:
1881: static void
1882: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
1883: {
1884: u_int i;
1885:
1886: for (i = 0; i < count; i++)
1.219 djm 1887: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
1888: }
1889:
1890: static void
1891: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
1892: {
1893: u_int i;
1894:
1895: printf("%s", lookup_opcode_name(code));
1896: for (i = 0; i < count; i++)
1897: printf(" %s", vals[i]);
1898: printf("\n");
1.182 dtucker 1899: }
1900:
1901: void
1902: dump_config(ServerOptions *o)
1903: {
1904: u_int i;
1905: int ret;
1906: struct addrinfo *ai;
1907: char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL;
1908:
1909: /* these are usually at the top of the config */
1910: for (i = 0; i < o->num_ports; i++)
1911: printf("port %d\n", o->ports[i]);
1912: dump_cfg_fmtint(sProtocol, o->protocol);
1913: dump_cfg_fmtint(sAddressFamily, o->address_family);
1914:
1915: /* ListenAddress must be after Port */
1916: for (ai = o->listen_addrs; ai; ai = ai->ai_next) {
1917: if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1918: sizeof(addr), port, sizeof(port),
1919: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1920: error("getnameinfo failed: %.100s",
1921: (ret != EAI_SYSTEM) ? gai_strerror(ret) :
1922: strerror(errno));
1923: } else {
1924: if (ai->ai_family == AF_INET6)
1925: printf("listenaddress [%s]:%s\n", addr, port);
1926: else
1927: printf("listenaddress %s:%s\n", addr, port);
1928: }
1929: }
1930:
1931: /* integer arguments */
1932: dump_cfg_int(sServerKeyBits, o->server_key_bits);
1933: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
1934: dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time);
1935: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
1936: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 1937: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 1938: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
1939: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1940:
1941: /* formatted integer arguments */
1942: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
1943: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
1944: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
1945: dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication);
1946: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
1947: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
1948: o->hostbased_uses_name_from_packet_only);
1949: dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication);
1950: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 1951: #ifdef KRB5
1.182 dtucker 1952: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
1953: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
1954: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
1955: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 1956: #endif
1957: #ifdef GSSAPI
1.182 dtucker 1958: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
1959: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.190 djm 1960: #endif
1961: #ifdef JPAKE
1962: dump_cfg_fmtint(sZeroKnowledgePasswordAuthentication,
1963: o->zero_knowledge_password_authentication);
1.187 djm 1964: #endif
1.182 dtucker 1965: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
1966: dump_cfg_fmtint(sKbdInteractiveAuthentication,
1967: o->kbd_interactive_authentication);
1968: dump_cfg_fmtint(sChallengeResponseAuthentication,
1969: o->challenge_response_authentication);
1970: dump_cfg_fmtint(sPrintMotd, o->print_motd);
1971: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
1972: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
1973: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1.244 djm 1974: dump_cfg_fmtint(sPermitTTY, o->permit_tty);
1.182 dtucker 1975: dump_cfg_fmtint(sStrictModes, o->strict_modes);
1976: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
1977: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
1978: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
1979: dump_cfg_fmtint(sUseLogin, o->use_login);
1980: dump_cfg_fmtint(sCompression, o->compression);
1981: dump_cfg_fmtint(sGatewayPorts, o->gateway_ports);
1982: dump_cfg_fmtint(sUseDNS, o->use_dns);
1983: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1984: dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
1985:
1986: /* string arguments */
1987: dump_cfg_string(sPidFile, o->pid_file);
1988: dump_cfg_string(sXAuthLocation, o->xauth_location);
1.245 dtucker 1989: dump_cfg_string(sCiphers, o->ciphers ? o->ciphers :
1.246 djm 1990: cipher_alg_list(',', 0));
1.245 dtucker 1991: dump_cfg_string(sMacs, o->macs ? o->macs : mac_alg_list(','));
1.182 dtucker 1992: dump_cfg_string(sBanner, o->banner);
1993: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 1994: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 1995: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
1996: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 1997: dump_cfg_string(sAuthorizedPrincipalsFile,
1998: o->authorized_principals_file);
1.225 djm 1999: dump_cfg_string(sVersionAddendum, o->version_addendum);
1.231 djm 2000: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
2001: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.240 markus 2002: dump_cfg_string(sHostKeyAgent, o->host_key_agent);
1.245 dtucker 2003: dump_cfg_string(sKexAlgorithms, o->kex_algorithms ? o->kex_algorithms :
2004: kex_alg_list(','));
1.182 dtucker 2005:
2006: /* string arguments requiring a lookup */
2007: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
2008: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
2009:
2010: /* string array arguments */
1.219 djm 2011: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
2012: o->authorized_keys_files);
1.182 dtucker 2013: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
2014: o->host_key_files);
1.203 djm 2015: dump_cfg_strarray(sHostKeyFile, o->num_host_cert_files,
2016: o->host_cert_files);
1.182 dtucker 2017: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
2018: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
2019: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
2020: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
2021: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 2022: dump_cfg_strarray_oneline(sAuthenticationMethods,
2023: o->num_auth_methods, o->auth_methods);
1.182 dtucker 2024:
2025: /* other arguments */
2026: for (i = 0; i < o->num_subsystems; i++)
2027: printf("subsystem %s %s\n", o->subsystem_name[i],
2028: o->subsystem_args[i]);
2029:
2030: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
2031: o->max_startups_rate, o->max_startups);
2032:
2033: for (i = 0; tunmode_desc[i].val != -1; i++)
2034: if (tunmode_desc[i].val == o->permit_tun) {
2035: s = tunmode_desc[i].text;
2036: break;
2037: }
2038: dump_cfg_string(sPermitTunnel, s);
1.213 djm 2039:
1.214 stevesk 2040: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2041: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2042:
1.241 djm 2043: printf("rekeylimit %lld %d\n", (long long)o->rekey_limit,
2044: o->rekey_interval);
1.182 dtucker 2045:
2046: channel_print_adm_permitted_opens();
1.1 deraadt 2047: }
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