Annotation of src/usr.bin/ssh/servconf.c, Revision 1.236
1.226 dtucker 1:
1.236 ! dtucker 2: /* $OpenBSD: servconf.c,v 1.235 2013/05/16 04:09:14 dtucker 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;
1.36 markus 73: options->pid_file = NULL;
1.25 markus 74: options->server_key_bits = -1;
75: options->login_grace_time = -1;
76: options->key_regeneration_time = -1;
1.67 markus 77: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 78: options->ignore_rhosts = -1;
79: options->ignore_user_known_hosts = -1;
80: options->print_motd = -1;
1.72 stevesk 81: options->print_lastlog = -1;
1.25 markus 82: options->x11_forwarding = -1;
83: options->x11_display_offset = -1;
1.99 stevesk 84: options->x11_use_localhost = -1;
1.42 markus 85: options->xauth_location = NULL;
1.25 markus 86: options->strict_modes = -1;
1.129 markus 87: options->tcp_keep_alive = -1;
1.101 markus 88: options->log_facility = SYSLOG_FACILITY_NOT_SET;
89: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 90: options->rhosts_rsa_authentication = -1;
1.75 markus 91: options->hostbased_authentication = -1;
92: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 93: options->rsa_authentication = -1;
1.54 markus 94: options->pubkey_authentication = -1;
1.25 markus 95: options->kerberos_authentication = -1;
96: options->kerberos_or_local_passwd = -1;
97: options->kerberos_ticket_cleanup = -1;
1.130 jakob 98: options->kerberos_get_afs_token = -1;
1.125 markus 99: options->gss_authentication=-1;
100: options->gss_cleanup_creds = -1;
1.25 markus 101: options->password_authentication = -1;
1.52 markus 102: options->kbd_interactive_authentication = -1;
1.80 markus 103: options->challenge_response_authentication = -1;
1.25 markus 104: options->permit_empty_passwd = -1;
1.113 markus 105: options->permit_user_env = -1;
1.25 markus 106: options->use_login = -1;
1.111 markus 107: options->compression = -1;
1.235 dtucker 108: options->rekey_limit = -1;
109: options->rekey_interval = -1;
1.53 markus 110: options->allow_tcp_forwarding = -1;
1.178 pyr 111: options->allow_agent_forwarding = -1;
1.25 markus 112: options->num_allow_users = 0;
113: options->num_deny_users = 0;
114: options->num_allow_groups = 0;
115: options->num_deny_groups = 0;
1.33 markus 116: options->ciphers = NULL;
1.66 markus 117: options->macs = NULL;
1.211 djm 118: options->kex_algorithms = NULL;
1.33 markus 119: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 120: options->gateway_ports = -1;
1.43 jakob 121: options->num_subsystems = 0;
1.50 markus 122: options->max_startups_begin = -1;
123: options->max_startups_rate = -1;
1.46 markus 124: options->max_startups = -1;
1.133 dtucker 125: options->max_authtries = -1;
1.180 djm 126: options->max_sessions = -1;
1.57 markus 127: options->banner = NULL;
1.122 markus 128: options->use_dns = -1;
1.77 beck 129: options->client_alive_interval = -1;
130: options->client_alive_count_max = -1;
1.219 djm 131: options->num_authkeys_files = 0;
1.131 djm 132: options->num_accept_env = 0;
1.145 reyk 133: options->permit_tun = -1;
1.159 dtucker 134: options->num_permitted_opens = -1;
1.158 dtucker 135: options->adm_forced_command = NULL;
1.176 djm 136: options->chroot_directory = NULL;
1.231 djm 137: options->authorized_keys_command = NULL;
138: options->authorized_keys_command_user = NULL;
1.190 djm 139: options->zero_knowledge_password_authentication = -1;
1.204 djm 140: options->revoked_keys_file = NULL;
141: options->trusted_user_ca_keys = NULL;
1.208 djm 142: options->authorized_principals_file = NULL;
1.213 djm 143: options->ip_qos_interactive = -1;
144: options->ip_qos_bulk = -1;
1.225 djm 145: options->version_addendum = NULL;
1.1 deraadt 146: }
147:
1.34 markus 148: void
1.25 markus 149: fill_default_server_options(ServerOptions *options)
1.1 deraadt 150: {
1.54 markus 151: if (options->protocol == SSH_PROTO_UNKNOWN)
1.196 markus 152: options->protocol = SSH_PROTO_2;
1.54 markus 153: if (options->num_host_key_files == 0) {
154: /* fill default hostkeys for protocols */
155: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 156: options->host_key_files[options->num_host_key_files++] =
157: _PATH_HOST_KEY_FILE;
158: if (options->protocol & SSH_PROTO_2) {
159: options->host_key_files[options->num_host_key_files++] =
160: _PATH_HOST_RSA_KEY_FILE;
161: options->host_key_files[options->num_host_key_files++] =
162: _PATH_HOST_DSA_KEY_FILE;
1.210 naddy 163: options->host_key_files[options->num_host_key_files++] =
164: _PATH_HOST_ECDSA_KEY_FILE;
1.97 stevesk 165: }
1.54 markus 166: }
1.203 djm 167: /* No certificates by default */
1.29 markus 168: if (options->num_ports == 0)
169: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
170: if (options->listen_addrs == NULL)
1.76 stevesk 171: add_listen_addr(options, NULL, 0);
1.36 markus 172: if (options->pid_file == NULL)
1.60 markus 173: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 174: if (options->server_key_bits == -1)
1.185 djm 175: options->server_key_bits = 1024;
1.25 markus 176: if (options->login_grace_time == -1)
1.115 stevesk 177: options->login_grace_time = 120;
1.25 markus 178: if (options->key_regeneration_time == -1)
179: options->key_regeneration_time = 3600;
1.67 markus 180: if (options->permit_root_login == PERMIT_NOT_SET)
181: options->permit_root_login = PERMIT_YES;
1.25 markus 182: if (options->ignore_rhosts == -1)
1.30 markus 183: options->ignore_rhosts = 1;
1.25 markus 184: if (options->ignore_user_known_hosts == -1)
185: options->ignore_user_known_hosts = 0;
186: if (options->print_motd == -1)
187: options->print_motd = 1;
1.72 stevesk 188: if (options->print_lastlog == -1)
189: options->print_lastlog = 1;
1.25 markus 190: if (options->x11_forwarding == -1)
1.30 markus 191: options->x11_forwarding = 0;
1.25 markus 192: if (options->x11_display_offset == -1)
1.30 markus 193: options->x11_display_offset = 10;
1.99 stevesk 194: if (options->x11_use_localhost == -1)
195: options->x11_use_localhost = 1;
1.42 markus 196: if (options->xauth_location == NULL)
1.83 markus 197: options->xauth_location = _PATH_XAUTH;
1.25 markus 198: if (options->strict_modes == -1)
199: options->strict_modes = 1;
1.129 markus 200: if (options->tcp_keep_alive == -1)
201: options->tcp_keep_alive = 1;
1.101 markus 202: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 203: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 204: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 205: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 206: if (options->rhosts_rsa_authentication == -1)
1.30 markus 207: options->rhosts_rsa_authentication = 0;
1.75 markus 208: if (options->hostbased_authentication == -1)
209: options->hostbased_authentication = 0;
210: if (options->hostbased_uses_name_from_packet_only == -1)
211: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 212: if (options->rsa_authentication == -1)
213: options->rsa_authentication = 1;
1.54 markus 214: if (options->pubkey_authentication == -1)
215: options->pubkey_authentication = 1;
1.25 markus 216: if (options->kerberos_authentication == -1)
1.107 markus 217: options->kerberos_authentication = 0;
1.25 markus 218: if (options->kerberos_or_local_passwd == -1)
219: options->kerberos_or_local_passwd = 1;
220: if (options->kerberos_ticket_cleanup == -1)
221: options->kerberos_ticket_cleanup = 1;
1.130 jakob 222: if (options->kerberos_get_afs_token == -1)
223: options->kerberos_get_afs_token = 0;
1.125 markus 224: if (options->gss_authentication == -1)
225: options->gss_authentication = 0;
226: if (options->gss_cleanup_creds == -1)
227: options->gss_cleanup_creds = 1;
1.25 markus 228: if (options->password_authentication == -1)
229: options->password_authentication = 1;
1.52 markus 230: if (options->kbd_interactive_authentication == -1)
231: options->kbd_interactive_authentication = 0;
1.80 markus 232: if (options->challenge_response_authentication == -1)
233: options->challenge_response_authentication = 1;
1.25 markus 234: if (options->permit_empty_passwd == -1)
1.30 markus 235: options->permit_empty_passwd = 0;
1.113 markus 236: if (options->permit_user_env == -1)
237: options->permit_user_env = 0;
1.25 markus 238: if (options->use_login == -1)
239: options->use_login = 0;
1.111 markus 240: if (options->compression == -1)
1.143 markus 241: options->compression = COMP_DELAYED;
1.235 dtucker 242: if (options->rekey_limit == -1)
243: options->rekey_limit = 0;
244: if (options->rekey_interval == -1)
245: options->rekey_interval = 0;
1.53 markus 246: if (options->allow_tcp_forwarding == -1)
1.233 djm 247: options->allow_tcp_forwarding = FORWARD_ALLOW;
1.178 pyr 248: if (options->allow_agent_forwarding == -1)
249: options->allow_agent_forwarding = 1;
1.38 markus 250: if (options->gateway_ports == -1)
251: options->gateway_ports = 0;
1.46 markus 252: if (options->max_startups == -1)
1.234 dtucker 253: options->max_startups = 100;
1.50 markus 254: if (options->max_startups_rate == -1)
1.234 dtucker 255: options->max_startups_rate = 30; /* 30% */
1.50 markus 256: if (options->max_startups_begin == -1)
1.234 dtucker 257: options->max_startups_begin = 10;
1.133 dtucker 258: if (options->max_authtries == -1)
259: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 260: if (options->max_sessions == -1)
261: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 262: if (options->use_dns == -1)
263: options->use_dns = 1;
1.77 beck 264: if (options->client_alive_interval == -1)
1.95 deraadt 265: options->client_alive_interval = 0;
1.77 beck 266: if (options->client_alive_count_max == -1)
267: options->client_alive_count_max = 3;
1.219 djm 268: if (options->num_authkeys_files == 0) {
269: options->authorized_keys_files[options->num_authkeys_files++] =
270: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS);
271: options->authorized_keys_files[options->num_authkeys_files++] =
272: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS2);
273: }
1.145 reyk 274: if (options->permit_tun == -1)
1.146 reyk 275: options->permit_tun = SSH_TUNMODE_NO;
1.190 djm 276: if (options->zero_knowledge_password_authentication == -1)
277: options->zero_knowledge_password_authentication = 0;
1.213 djm 278: if (options->ip_qos_interactive == -1)
279: options->ip_qos_interactive = IPTOS_LOWDELAY;
280: if (options->ip_qos_bulk == -1)
281: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 282: if (options->version_addendum == NULL)
283: options->version_addendum = xstrdup("");
1.110 markus 284: /* Turn privilege separation on by default */
1.102 provos 285: if (use_privsep == -1)
1.228 djm 286: use_privsep = PRIVSEP_NOSANDBOX;
1.1 deraadt 287: }
288:
289: /* Keyword tokens. */
1.25 markus 290: typedef enum {
291: sBadOption, /* == unknown option */
292: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
293: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 294: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 295: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 296: sKerberosGetAFSToken,
1.123 markus 297: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 298: sPasswordAuthentication, sKbdInteractiveAuthentication,
299: sListenAddress, sAddressFamily,
1.72 stevesk 300: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 301: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 302: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 303: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.235 dtucker 304: sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 305: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 306: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
1.180 djm 307: sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 308: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 309: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.219 djm 310: sClientAliveCountMax, sAuthorizedKeysFile,
1.145 reyk 311: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.176 djm 312: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 313: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.203 djm 314: sZeroKnowledgePasswordAuthentication, sHostCertificate,
1.208 djm 315: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.225 djm 316: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.231 djm 317: sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
1.232 djm 318: sAuthenticationMethods,
1.121 jakob 319: sDeprecated, sUnsupported
1.1 deraadt 320: } ServerOpCodes;
321:
1.153 dtucker 322: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
323: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
324: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
325:
1.1 deraadt 326: /* Textual representation of the tokens. */
1.25 markus 327: static struct {
328: const char *name;
329: ServerOpCodes opcode;
1.153 dtucker 330: u_int flags;
1.25 markus 331: } keywords[] = {
1.153 dtucker 332: { "port", sPort, SSHCFG_GLOBAL },
333: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
334: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
335: { "pidfile", sPidFile, SSHCFG_GLOBAL },
336: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
337: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
338: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
1.175 dtucker 339: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 340: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
341: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
342: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.168 dtucker 343: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL },
344: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 345: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.168 dtucker 346: { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL },
347: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.153 dtucker 348: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 349: #ifdef KRB5
1.168 dtucker 350: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 351: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
352: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
353: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 354: #else
1.168 dtucker 355: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 356: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
357: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
358: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 359: #endif
1.153 dtucker 360: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
361: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 362: #ifdef GSSAPI
1.168 dtucker 363: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 364: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.125 markus 365: #else
1.168 dtucker 366: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 367: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 368: #endif
1.168 dtucker 369: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
370: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 371: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 372: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
1.190 djm 373: #ifdef JPAKE
374: { "zeroknowledgepasswordauthentication", sZeroKnowledgePasswordAuthentication, SSHCFG_ALL },
375: #else
376: { "zeroknowledgepasswordauthentication", sUnsupported, SSHCFG_ALL },
377: #endif
1.153 dtucker 378: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
379: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
380: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
381: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
382: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
383: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
384: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 385: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
386: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
387: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 388: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
389: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 390: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 391: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
392: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
393: { "compression", sCompression, SSHCFG_GLOBAL },
1.235 dtucker 394: { "rekeylimit", sRekeyLimit, SSHCFG_ALL },
1.153 dtucker 395: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
396: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
397: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 398: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 399: { "allowusers", sAllowUsers, SSHCFG_ALL },
400: { "denyusers", sDenyUsers, SSHCFG_ALL },
401: { "allowgroups", sAllowGroups, SSHCFG_ALL },
402: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 403: { "ciphers", sCiphers, SSHCFG_GLOBAL },
404: { "macs", sMacs, SSHCFG_GLOBAL },
405: { "protocol", sProtocol, SSHCFG_GLOBAL },
406: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
407: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
408: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 409: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 410: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 411: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 412: { "usedns", sUseDNS, SSHCFG_GLOBAL },
413: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
414: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
415: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
416: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
1.209 djm 417: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 418: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.153 dtucker 419: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
1.227 markus 420: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 421: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.153 dtucker 422: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 423: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 424: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 425: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 426: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 427: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
428: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 429: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 430: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 431: { "ipqos", sIPQoS, SSHCFG_ALL },
1.231 djm 432: { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
433: { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
1.225 djm 434: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.232 djm 435: { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
1.153 dtucker 436: { NULL, sBadOption, 0 }
1.1 deraadt 437: };
438:
1.182 dtucker 439: static struct {
440: int val;
441: char *text;
442: } tunmode_desc[] = {
443: { SSH_TUNMODE_NO, "no" },
444: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
445: { SSH_TUNMODE_ETHERNET, "ethernet" },
446: { SSH_TUNMODE_YES, "yes" },
447: { -1, NULL }
448: };
449:
1.27 markus 450: /*
1.73 stevesk 451: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 452: */
1.1 deraadt 453:
1.34 markus 454: static ServerOpCodes
1.25 markus 455: parse_token(const char *cp, const char *filename,
1.153 dtucker 456: int linenum, u_int *flags)
1.1 deraadt 457: {
1.55 markus 458: u_int i;
1.1 deraadt 459:
1.25 markus 460: for (i = 0; keywords[i].name; i++)
1.153 dtucker 461: if (strcasecmp(cp, keywords[i].name) == 0) {
462: *flags = keywords[i].flags;
1.25 markus 463: return keywords[i].opcode;
1.153 dtucker 464: }
1.25 markus 465:
1.78 stevesk 466: error("%s: line %d: Bad configuration option: %s",
467: filename, linenum, cp);
1.25 markus 468: return sBadOption;
1.1 deraadt 469: }
470:
1.202 djm 471: char *
472: derelativise_path(const char *path)
473: {
1.207 djm 474: char *expanded, *ret, cwd[MAXPATHLEN];
1.202 djm 475:
476: expanded = tilde_expand_filename(path, getuid());
477: if (*expanded == '/')
478: return expanded;
1.207 djm 479: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 480: fatal("%s: getcwd: %s", __func__, strerror(errno));
481: xasprintf(&ret, "%s/%s", cwd, expanded);
482: xfree(expanded);
483: return ret;
484: }
485:
1.84 itojun 486: static void
1.194 djm 487: add_listen_addr(ServerOptions *options, char *addr, int port)
1.74 stevesk 488: {
1.142 djm 489: u_int i;
1.74 stevesk 490:
491: if (options->num_ports == 0)
492: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 493: if (options->address_family == -1)
494: options->address_family = AF_UNSPEC;
1.76 stevesk 495: if (port == 0)
1.74 stevesk 496: for (i = 0; i < options->num_ports; i++)
497: add_one_listen_addr(options, addr, options->ports[i]);
498: else
1.76 stevesk 499: add_one_listen_addr(options, addr, port);
1.74 stevesk 500: }
501:
1.84 itojun 502: static void
1.194 djm 503: add_one_listen_addr(ServerOptions *options, char *addr, int port)
1.29 markus 504: {
505: struct addrinfo hints, *ai, *aitop;
506: char strport[NI_MAXSERV];
507: int gaierr;
508:
1.74 stevesk 509: memset(&hints, 0, sizeof(hints));
1.138 djm 510: hints.ai_family = options->address_family;
1.74 stevesk 511: hints.ai_socktype = SOCK_STREAM;
512: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 513: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 514: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
515: fatal("bad addr or host: %s (%s)",
516: addr ? addr : "<NULL>",
1.173 dtucker 517: ssh_gai_strerror(gaierr));
1.74 stevesk 518: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
519: ;
520: ai->ai_next = options->listen_addrs;
521: options->listen_addrs = aitop;
1.29 markus 522: }
523:
1.226 dtucker 524: struct connection_info *
525: get_connection_info(int populate, int use_dns)
526: {
527: static struct connection_info ci;
528:
529: if (!populate)
530: return &ci;
531: ci.host = get_canonical_hostname(use_dns);
532: ci.address = get_remote_ipaddr();
533: ci.laddress = get_local_ipaddr(packet_get_connection_in());
534: ci.lport = get_local_port();
535: return &ci;
536: }
537:
1.153 dtucker 538: /*
539: * The strategy for the Match blocks is that the config file is parsed twice.
540: *
541: * The first time is at startup. activep is initialized to 1 and the
542: * directives in the global context are processed and acted on. Hitting a
543: * Match directive unsets activep and the directives inside the block are
544: * checked for syntax only.
545: *
546: * The second time is after a connection has been established but before
547: * authentication. activep is initialized to 2 and global config directives
548: * are ignored since they have already been processed. If the criteria in a
549: * Match block is met, activep is set and the subsequent directives
550: * processed and actioned until EOF or another Match block unsets it. Any
551: * options set are copied into the main server config.
552: *
553: * Potential additions/improvements:
554: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
555: *
556: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
557: * Match Address 192.168.0.*
558: * Tag trusted
559: * Match Group wheel
560: * Tag trusted
561: * Match Tag trusted
562: * AllowTcpForwarding yes
563: * GatewayPorts clientspecified
564: * [...]
565: *
566: * - Add a PermittedChannelRequests directive
567: * Match Group shell
568: * PermittedChannelRequests session,forwarded-tcpip
569: */
570:
571: static int
1.165 dtucker 572: match_cfg_line_group(const char *grps, int line, const char *user)
573: {
574: int result = 0;
575: struct passwd *pw;
576:
577: if (user == NULL)
578: goto out;
579:
580: if ((pw = getpwnam(user)) == NULL) {
581: debug("Can't match group at line %d because user %.100s does "
582: "not exist", line, user);
583: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
584: debug("Can't Match group because user %.100s not in any group "
585: "at line %d", user, line);
1.186 djm 586: } else if (ga_match_pattern_list(grps) != 1) {
587: debug("user %.100s does not match group list %.100s at line %d",
588: user, grps, line);
1.165 dtucker 589: } else {
1.186 djm 590: debug("user %.100s matched group list %.100s at line %d", user,
591: grps, line);
1.165 dtucker 592: result = 1;
593: }
594: out:
595: ga_free();
596: return result;
597: }
598:
1.226 dtucker 599: /*
1.230 dtucker 600: * All of the attributes on a single Match line are ANDed together, so we need
601: * to check every * attribute and set the result to zero if any attribute does
602: * not match.
1.226 dtucker 603: */
1.165 dtucker 604: static int
1.226 dtucker 605: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 606: {
1.226 dtucker 607: int result = 1, port;
1.153 dtucker 608: char *arg, *attrib, *cp = *condition;
609: size_t len;
610:
1.226 dtucker 611: if (ci == NULL)
1.153 dtucker 612: debug3("checking syntax for 'Match %s'", cp);
613: else
1.226 dtucker 614: debug3("checking match for '%s' user %s host %s addr %s "
615: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
616: ci->host ? ci->host : "(null)",
617: ci->address ? ci->address : "(null)",
618: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 619:
620: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
621: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
622: error("Missing Match criteria for %s", attrib);
623: return -1;
624: }
625: len = strlen(arg);
626: if (strcasecmp(attrib, "user") == 0) {
1.226 dtucker 627: if (ci == NULL || ci->user == NULL) {
1.153 dtucker 628: result = 0;
629: continue;
630: }
1.226 dtucker 631: if (match_pattern_list(ci->user, arg, len, 0) != 1)
1.153 dtucker 632: result = 0;
633: else
634: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 635: "line %d", ci->user, arg, line);
1.165 dtucker 636: } else if (strcasecmp(attrib, "group") == 0) {
1.226 dtucker 637: if (ci == NULL || ci->user == NULL) {
638: result = 0;
639: continue;
640: }
641: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 642: case -1:
643: return -1;
644: case 0:
645: result = 0;
646: }
1.153 dtucker 647: } else if (strcasecmp(attrib, "host") == 0) {
1.226 dtucker 648: if (ci == NULL || ci->host == NULL) {
1.153 dtucker 649: result = 0;
650: continue;
651: }
1.226 dtucker 652: if (match_hostname(ci->host, arg, len) != 1)
1.153 dtucker 653: result = 0;
654: else
655: debug("connection from %.100s matched 'Host "
1.226 dtucker 656: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 657: } else if (strcasecmp(attrib, "address") == 0) {
1.226 dtucker 658: if (ci == NULL || ci->address == NULL) {
659: result = 0;
660: continue;
661: }
662: switch (addr_match_list(ci->address, arg)) {
1.181 djm 663: case 1:
664: debug("connection from %.100s matched 'Address "
1.226 dtucker 665: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 666: break;
667: case 0:
1.183 djm 668: case -1:
1.153 dtucker 669: result = 0;
1.181 djm 670: break;
1.183 djm 671: case -2:
1.181 djm 672: return -1;
1.153 dtucker 673: }
1.226 dtucker 674: } else if (strcasecmp(attrib, "localaddress") == 0){
675: if (ci == NULL || ci->laddress == NULL) {
676: result = 0;
677: continue;
678: }
679: switch (addr_match_list(ci->laddress, arg)) {
680: case 1:
681: debug("connection from %.100s matched "
682: "'LocalAddress %.100s' at line %d",
683: ci->laddress, arg, line);
684: break;
685: case 0:
686: case -1:
687: result = 0;
688: break;
689: case -2:
690: return -1;
691: }
692: } else if (strcasecmp(attrib, "localport") == 0) {
693: if ((port = a2port(arg)) == -1) {
694: error("Invalid LocalPort '%s' on Match line",
695: arg);
696: return -1;
697: }
698: if (ci == NULL || ci->lport == 0) {
699: result = 0;
700: continue;
701: }
702: /* TODO support port lists */
703: if (port == ci->lport)
704: debug("connection from %.100s matched "
705: "'LocalPort %d' at line %d",
706: ci->laddress, port, line);
707: else
708: result = 0;
1.153 dtucker 709: } else {
710: error("Unsupported Match attribute %s", attrib);
711: return -1;
712: }
713: }
1.226 dtucker 714: if (ci != NULL)
1.153 dtucker 715: debug3("match %sfound", result ? "" : "not ");
716: *condition = cp;
717: return result;
718: }
719:
1.158 dtucker 720: #define WHITESPACE " \t\r\n"
721:
1.220 djm 722: /* Multistate option parsing */
723: struct multistate {
724: char *key;
725: int value;
726: };
727: static const struct multistate multistate_addressfamily[] = {
728: { "inet", AF_INET },
729: { "inet6", AF_INET6 },
730: { "any", AF_UNSPEC },
731: { NULL, -1 }
732: };
733: static const struct multistate multistate_permitrootlogin[] = {
734: { "without-password", PERMIT_NO_PASSWD },
735: { "forced-commands-only", PERMIT_FORCED_ONLY },
736: { "yes", PERMIT_YES },
737: { "no", PERMIT_NO },
738: { NULL, -1 }
739: };
740: static const struct multistate multistate_compression[] = {
741: { "delayed", COMP_DELAYED },
742: { "yes", COMP_ZLIB },
743: { "no", COMP_NONE },
744: { NULL, -1 }
745: };
746: static const struct multistate multistate_gatewayports[] = {
747: { "clientspecified", 2 },
748: { "yes", 1 },
749: { "no", 0 },
750: { NULL, -1 }
751: };
1.222 djm 752: static const struct multistate multistate_privsep[] = {
1.228 djm 753: { "yes", PRIVSEP_NOSANDBOX },
754: { "sandbox", PRIVSEP_ON },
755: { "nosandbox", PRIVSEP_NOSANDBOX },
1.222 djm 756: { "no", PRIVSEP_OFF },
757: { NULL, -1 }
758: };
1.233 djm 759: static const struct multistate multistate_tcpfwd[] = {
760: { "yes", FORWARD_ALLOW },
761: { "all", FORWARD_ALLOW },
762: { "no", FORWARD_DENY },
763: { "remote", FORWARD_REMOTE },
764: { "local", FORWARD_LOCAL },
765: { NULL, -1 }
766: };
1.220 djm 767:
1.94 markus 768: int
769: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 770: const char *filename, int linenum, int *activep,
771: struct connection_info *connectinfo)
1.1 deraadt 772: {
1.235 dtucker 773: char *cp, **charptr, *arg, *p, *endofnumber;
774: int cmdline = 0, *intptr, value, value2, n, port, scale;
1.174 dtucker 775: SyslogFacility *log_facility_ptr;
776: LogLevel *log_level_ptr;
1.25 markus 777: ServerOpCodes opcode;
1.153 dtucker 778: u_int i, flags = 0;
1.151 djm 779: size_t len;
1.235 dtucker 780: long long orig, val64;
1.220 djm 781: const struct multistate *multistate_ptr;
1.25 markus 782:
1.94 markus 783: cp = line;
1.148 dtucker 784: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 785: return 0;
1.94 markus 786: /* Ignore leading whitespace */
787: if (*arg == '\0')
788: arg = strdelim(&cp);
789: if (!arg || !*arg || *arg == '#')
790: return 0;
791: intptr = NULL;
792: charptr = NULL;
1.153 dtucker 793: opcode = parse_token(arg, filename, linenum, &flags);
794:
795: if (activep == NULL) { /* We are processing a command line directive */
796: cmdline = 1;
797: activep = &cmdline;
798: }
799: if (*activep && opcode != sMatch)
800: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
801: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 802: if (connectinfo == NULL) {
1.153 dtucker 803: fatal("%s line %d: Directive '%s' is not allowed "
804: "within a Match block", filename, linenum, arg);
805: } else { /* this is a directive we have already processed */
806: while (arg)
807: arg = strdelim(&cp);
808: return 0;
809: }
810: }
811:
1.94 markus 812: switch (opcode) {
813: case sBadOption:
814: return -1;
815: case sPort:
816: /* ignore ports from configfile if cmdline specifies ports */
817: if (options->ports_from_cmdline)
818: return 0;
819: if (options->listen_addrs != NULL)
820: fatal("%s line %d: ports must be specified before "
1.98 stevesk 821: "ListenAddress.", filename, linenum);
1.94 markus 822: if (options->num_ports >= MAX_PORTS)
823: fatal("%s line %d: too many ports.",
824: filename, linenum);
1.48 provos 825: arg = strdelim(&cp);
1.94 markus 826: if (!arg || *arg == '\0')
827: fatal("%s line %d: missing port number.",
828: filename, linenum);
829: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 830: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 831: fatal("%s line %d: Badly formatted port number.",
832: filename, linenum);
833: break;
1.29 markus 834:
1.94 markus 835: case sServerKeyBits:
836: intptr = &options->server_key_bits;
1.180 djm 837: parse_int:
1.94 markus 838: arg = strdelim(&cp);
839: if (!arg || *arg == '\0')
840: fatal("%s line %d: missing integer value.",
841: filename, linenum);
842: value = atoi(arg);
1.153 dtucker 843: if (*activep && *intptr == -1)
1.94 markus 844: *intptr = value;
845: break;
1.25 markus 846:
1.94 markus 847: case sLoginGraceTime:
848: intptr = &options->login_grace_time;
1.180 djm 849: parse_time:
1.94 markus 850: arg = strdelim(&cp);
851: if (!arg || *arg == '\0')
852: fatal("%s line %d: missing time value.",
853: filename, linenum);
854: if ((value = convtime(arg)) == -1)
855: fatal("%s line %d: invalid time value.",
856: filename, linenum);
857: if (*intptr == -1)
858: *intptr = value;
859: break;
860:
861: case sKeyRegenerationTime:
862: intptr = &options->key_regeneration_time;
863: goto parse_time;
864:
865: case sListenAddress:
866: arg = strdelim(&cp);
1.139 djm 867: if (arg == NULL || *arg == '\0')
868: fatal("%s line %d: missing address",
1.94 markus 869: filename, linenum);
1.144 dtucker 870: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
871: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
872: && strchr(p+1, ':') != NULL) {
873: add_listen_addr(options, arg, 0);
874: break;
875: }
1.139 djm 876: p = hpdelim(&arg);
877: if (p == NULL)
878: fatal("%s line %d: bad address:port usage",
879: filename, linenum);
880: p = cleanhostname(p);
881: if (arg == NULL)
882: port = 0;
1.194 djm 883: else if ((port = a2port(arg)) <= 0)
1.139 djm 884: fatal("%s line %d: bad port number", filename, linenum);
885:
886: add_listen_addr(options, p, port);
1.25 markus 887:
1.138 djm 888: break;
889:
890: case sAddressFamily:
1.220 djm 891: intptr = &options->address_family;
892: multistate_ptr = multistate_addressfamily;
893: if (options->listen_addrs != NULL)
894: fatal("%s line %d: address family must be specified "
895: "before ListenAddress.", filename, linenum);
896: parse_multistate:
1.138 djm 897: arg = strdelim(&cp);
1.141 markus 898: if (!arg || *arg == '\0')
1.220 djm 899: fatal("%s line %d: missing argument.",
1.141 markus 900: filename, linenum);
1.220 djm 901: value = -1;
902: for (i = 0; multistate_ptr[i].key != NULL; i++) {
903: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
904: value = multistate_ptr[i].value;
905: break;
906: }
907: }
908: if (value == -1)
909: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 910: filename, linenum, arg);
1.220 djm 911: if (*activep && *intptr == -1)
1.138 djm 912: *intptr = value;
1.94 markus 913: break;
914:
915: case sHostKeyFile:
916: intptr = &options->num_host_key_files;
917: if (*intptr >= MAX_HOSTKEYS)
918: fatal("%s line %d: too many host keys specified (max %d).",
919: filename, linenum, MAX_HOSTKEYS);
920: charptr = &options->host_key_files[*intptr];
1.180 djm 921: parse_filename:
1.94 markus 922: arg = strdelim(&cp);
923: if (!arg || *arg == '\0')
924: fatal("%s line %d: missing file name.",
925: filename, linenum);
1.153 dtucker 926: if (*activep && *charptr == NULL) {
1.202 djm 927: *charptr = derelativise_path(arg);
1.94 markus 928: /* increase optional counter */
929: if (intptr != NULL)
930: *intptr = *intptr + 1;
931: }
932: break;
1.76 stevesk 933:
1.203 djm 934: case sHostCertificate:
935: intptr = &options->num_host_cert_files;
936: if (*intptr >= MAX_HOSTKEYS)
937: fatal("%s line %d: too many host certificates "
938: "specified (max %d).", filename, linenum,
939: MAX_HOSTCERTS);
940: charptr = &options->host_cert_files[*intptr];
941: goto parse_filename;
942: break;
943:
1.94 markus 944: case sPidFile:
945: charptr = &options->pid_file;
946: goto parse_filename;
1.25 markus 947:
1.94 markus 948: case sPermitRootLogin:
949: intptr = &options->permit_root_login;
1.220 djm 950: multistate_ptr = multistate_permitrootlogin;
951: goto parse_multistate;
1.36 markus 952:
1.94 markus 953: case sIgnoreRhosts:
954: intptr = &options->ignore_rhosts;
1.180 djm 955: parse_flag:
1.94 markus 956: arg = strdelim(&cp);
957: if (!arg || *arg == '\0')
958: fatal("%s line %d: missing yes/no argument.",
959: filename, linenum);
960: value = 0; /* silence compiler */
961: if (strcmp(arg, "yes") == 0)
962: value = 1;
963: else if (strcmp(arg, "no") == 0)
964: value = 0;
965: else
966: fatal("%s line %d: Bad yes/no argument: %s",
967: filename, linenum, arg);
1.153 dtucker 968: if (*activep && *intptr == -1)
1.94 markus 969: *intptr = value;
970: break;
971:
972: case sIgnoreUserKnownHosts:
973: intptr = &options->ignore_user_known_hosts;
974: goto parse_flag;
975:
976: case sRhostsRSAAuthentication:
977: intptr = &options->rhosts_rsa_authentication;
978: goto parse_flag;
979:
980: case sHostbasedAuthentication:
981: intptr = &options->hostbased_authentication;
982: goto parse_flag;
983:
984: case sHostbasedUsesNameFromPacketOnly:
985: intptr = &options->hostbased_uses_name_from_packet_only;
986: goto parse_flag;
987:
988: case sRSAAuthentication:
989: intptr = &options->rsa_authentication;
990: goto parse_flag;
991:
992: case sPubkeyAuthentication:
993: intptr = &options->pubkey_authentication;
994: goto parse_flag;
1.119 jakob 995:
1.94 markus 996: case sKerberosAuthentication:
997: intptr = &options->kerberos_authentication;
998: goto parse_flag;
999:
1000: case sKerberosOrLocalPasswd:
1001: intptr = &options->kerberos_or_local_passwd;
1002: goto parse_flag;
1003:
1004: case sKerberosTicketCleanup:
1005: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 1006: goto parse_flag;
1007:
1008: case sKerberosGetAFSToken:
1009: intptr = &options->kerberos_get_afs_token;
1.125 markus 1010: goto parse_flag;
1011:
1012: case sGssAuthentication:
1013: intptr = &options->gss_authentication;
1014: goto parse_flag;
1015:
1016: case sGssCleanupCreds:
1017: intptr = &options->gss_cleanup_creds;
1.94 markus 1018: goto parse_flag;
1019:
1020: case sPasswordAuthentication:
1021: intptr = &options->password_authentication;
1022: goto parse_flag;
1023:
1.190 djm 1024: case sZeroKnowledgePasswordAuthentication:
1025: intptr = &options->zero_knowledge_password_authentication;
1026: goto parse_flag;
1027:
1.94 markus 1028: case sKbdInteractiveAuthentication:
1029: intptr = &options->kbd_interactive_authentication;
1030: goto parse_flag;
1031:
1032: case sChallengeResponseAuthentication:
1033: intptr = &options->challenge_response_authentication;
1034: goto parse_flag;
1035:
1036: case sPrintMotd:
1037: intptr = &options->print_motd;
1038: goto parse_flag;
1039:
1040: case sPrintLastLog:
1041: intptr = &options->print_lastlog;
1042: goto parse_flag;
1043:
1044: case sX11Forwarding:
1045: intptr = &options->x11_forwarding;
1046: goto parse_flag;
1047:
1048: case sX11DisplayOffset:
1049: intptr = &options->x11_display_offset;
1050: goto parse_int;
1.99 stevesk 1051:
1052: case sX11UseLocalhost:
1053: intptr = &options->x11_use_localhost;
1054: goto parse_flag;
1.94 markus 1055:
1056: case sXAuthLocation:
1057: charptr = &options->xauth_location;
1058: goto parse_filename;
1059:
1060: case sStrictModes:
1061: intptr = &options->strict_modes;
1062: goto parse_flag;
1063:
1.129 markus 1064: case sTCPKeepAlive:
1065: intptr = &options->tcp_keep_alive;
1.94 markus 1066: goto parse_flag;
1067:
1068: case sEmptyPasswd:
1069: intptr = &options->permit_empty_passwd;
1.113 markus 1070: goto parse_flag;
1071:
1072: case sPermitUserEnvironment:
1073: intptr = &options->permit_user_env;
1.94 markus 1074: goto parse_flag;
1075:
1076: case sUseLogin:
1077: intptr = &options->use_login;
1.111 markus 1078: goto parse_flag;
1079:
1080: case sCompression:
1081: intptr = &options->compression;
1.220 djm 1082: multistate_ptr = multistate_compression;
1083: goto parse_multistate;
1.94 markus 1084:
1.235 dtucker 1085: case sRekeyLimit:
1086: arg = strdelim(&cp);
1087: if (!arg || *arg == '\0')
1088: fatal("%.200s line %d: Missing argument.", filename,
1089: linenum);
1090: if (strcmp(arg, "default") == 0) {
1091: val64 = 0;
1092: } else {
1.236 ! dtucker 1093: if (scan_scaled(arg, &val64) == -1)
! 1094: fatal("%.200s line %d: Bad number '%s': %s",
! 1095: filename, linenum, arg, strerror(errno));
! 1096: /* check for too-large or too-small limits */
! 1097: if (val64 > UINT_MAX)
1.235 dtucker 1098: fatal("%.200s line %d: RekeyLimit too large",
1099: filename, linenum);
1100: if (val64 != 0 && val64 < 16)
1101: fatal("%.200s line %d: RekeyLimit too small",
1102: filename, linenum);
1103: }
1104: if (*activep && options->rekey_limit == -1)
1105: options->rekey_limit = (u_int32_t)val64;
1106: if (cp != NULL) { /* optional rekey interval present */
1107: if (strcmp(cp, "none") == 0) {
1108: (void)strdelim(&cp); /* discard */
1109: break;
1110: }
1111: intptr = &options->rekey_interval;
1112: goto parse_time;
1113: }
1114: break;
1115:
1.94 markus 1116: case sGatewayPorts:
1117: intptr = &options->gateway_ports;
1.220 djm 1118: multistate_ptr = multistate_gatewayports;
1119: goto parse_multistate;
1.25 markus 1120:
1.122 markus 1121: case sUseDNS:
1122: intptr = &options->use_dns;
1.94 markus 1123: goto parse_flag;
1.53 markus 1124:
1.94 markus 1125: case sLogFacility:
1.174 dtucker 1126: log_facility_ptr = &options->log_facility;
1.94 markus 1127: arg = strdelim(&cp);
1128: value = log_facility_number(arg);
1.101 markus 1129: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1130: fatal("%.200s line %d: unsupported log facility '%s'",
1131: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1132: if (*log_facility_ptr == -1)
1133: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1134: break;
1.25 markus 1135:
1.94 markus 1136: case sLogLevel:
1.174 dtucker 1137: log_level_ptr = &options->log_level;
1.94 markus 1138: arg = strdelim(&cp);
1139: value = log_level_number(arg);
1.101 markus 1140: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1141: fatal("%.200s line %d: unsupported log level '%s'",
1142: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1143: if (*log_level_ptr == -1)
1144: *log_level_ptr = (LogLevel) value;
1.94 markus 1145: break;
1146:
1147: case sAllowTcpForwarding:
1148: intptr = &options->allow_tcp_forwarding;
1.233 djm 1149: multistate_ptr = multistate_tcpfwd;
1150: goto parse_multistate;
1.102 provos 1151:
1.178 pyr 1152: case sAllowAgentForwarding:
1153: intptr = &options->allow_agent_forwarding;
1154: goto parse_flag;
1155:
1.102 provos 1156: case sUsePrivilegeSeparation:
1157: intptr = &use_privsep;
1.222 djm 1158: multistate_ptr = multistate_privsep;
1159: goto parse_multistate;
1.94 markus 1160:
1161: case sAllowUsers:
1162: while ((arg = strdelim(&cp)) && *arg != '\0') {
1163: if (options->num_allow_users >= MAX_ALLOW_USERS)
1164: fatal("%s line %d: too many allow users.",
1165: filename, linenum);
1.227 markus 1166: if (!*activep)
1167: continue;
1.112 deraadt 1168: options->allow_users[options->num_allow_users++] =
1169: xstrdup(arg);
1.94 markus 1170: }
1171: break;
1.25 markus 1172:
1.94 markus 1173: case sDenyUsers:
1174: while ((arg = strdelim(&cp)) && *arg != '\0') {
1175: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 stevesk 1176: fatal("%s line %d: too many deny users.",
1.94 markus 1177: filename, linenum);
1.227 markus 1178: if (!*activep)
1179: continue;
1.112 deraadt 1180: options->deny_users[options->num_deny_users++] =
1181: xstrdup(arg);
1.94 markus 1182: }
1183: break;
1.25 markus 1184:
1.94 markus 1185: case sAllowGroups:
1186: while ((arg = strdelim(&cp)) && *arg != '\0') {
1187: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1188: fatal("%s line %d: too many allow groups.",
1189: filename, linenum);
1.227 markus 1190: if (!*activep)
1191: continue;
1.112 deraadt 1192: options->allow_groups[options->num_allow_groups++] =
1193: xstrdup(arg);
1.94 markus 1194: }
1195: break;
1.33 markus 1196:
1.94 markus 1197: case sDenyGroups:
1198: while ((arg = strdelim(&cp)) && *arg != '\0') {
1199: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1200: fatal("%s line %d: too many deny groups.",
1201: filename, linenum);
1.227 markus 1202: if (!*activep)
1203: continue;
1204: options->deny_groups[options->num_deny_groups++] =
1205: xstrdup(arg);
1.94 markus 1206: }
1207: break;
1.66 markus 1208:
1.94 markus 1209: case sCiphers:
1210: arg = strdelim(&cp);
1211: if (!arg || *arg == '\0')
1212: fatal("%s line %d: Missing argument.", filename, linenum);
1213: if (!ciphers_valid(arg))
1214: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1215: filename, linenum, arg ? arg : "<NONE>");
1216: if (options->ciphers == NULL)
1217: options->ciphers = xstrdup(arg);
1218: break;
1.33 markus 1219:
1.94 markus 1220: case sMacs:
1221: arg = strdelim(&cp);
1222: if (!arg || *arg == '\0')
1223: fatal("%s line %d: Missing argument.", filename, linenum);
1224: if (!mac_valid(arg))
1225: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1226: filename, linenum, arg ? arg : "<NONE>");
1227: if (options->macs == NULL)
1228: options->macs = xstrdup(arg);
1.211 djm 1229: break;
1230:
1231: case sKexAlgorithms:
1232: arg = strdelim(&cp);
1233: if (!arg || *arg == '\0')
1234: fatal("%s line %d: Missing argument.",
1235: filename, linenum);
1236: if (!kex_names_valid(arg))
1237: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1238: filename, linenum, arg ? arg : "<NONE>");
1239: if (options->kex_algorithms == NULL)
1240: options->kex_algorithms = xstrdup(arg);
1.94 markus 1241: break;
1.43 jakob 1242:
1.94 markus 1243: case sProtocol:
1244: intptr = &options->protocol;
1245: arg = strdelim(&cp);
1246: if (!arg || *arg == '\0')
1247: fatal("%s line %d: Missing argument.", filename, linenum);
1248: value = proto_spec(arg);
1249: if (value == SSH_PROTO_UNKNOWN)
1250: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 1251: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 1252: if (*intptr == SSH_PROTO_UNKNOWN)
1253: *intptr = value;
1254: break;
1255:
1256: case sSubsystem:
1257: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1258: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1259: filename, linenum);
1.94 markus 1260: }
1261: arg = strdelim(&cp);
1262: if (!arg || *arg == '\0')
1263: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1264: filename, linenum);
1.153 dtucker 1265: if (!*activep) {
1266: arg = strdelim(&cp);
1267: break;
1268: }
1.94 markus 1269: for (i = 0; i < options->num_subsystems; i++)
1270: if (strcmp(arg, options->subsystem_name[i]) == 0)
1271: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1272: filename, linenum, arg);
1.94 markus 1273: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1274: arg = strdelim(&cp);
1275: if (!arg || *arg == '\0')
1276: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1277: filename, linenum);
1.94 markus 1278: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1279:
1280: /* Collect arguments (separate to executable) */
1281: p = xstrdup(arg);
1282: len = strlen(p) + 1;
1283: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1284: len += 1 + strlen(arg);
1285: p = xrealloc(p, 1, len);
1286: strlcat(p, " ", len);
1287: strlcat(p, arg, len);
1288: }
1289: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1290: options->num_subsystems++;
1291: break;
1.46 markus 1292:
1.94 markus 1293: case sMaxStartups:
1294: arg = strdelim(&cp);
1295: if (!arg || *arg == '\0')
1296: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1297: filename, linenum);
1.94 markus 1298: if ((n = sscanf(arg, "%d:%d:%d",
1299: &options->max_startups_begin,
1300: &options->max_startups_rate,
1301: &options->max_startups)) == 3) {
1302: if (options->max_startups_begin >
1303: options->max_startups ||
1304: options->max_startups_rate > 100 ||
1305: options->max_startups_rate < 1)
1.50 markus 1306: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1307: filename, linenum);
1.94 markus 1308: } else if (n != 1)
1309: fatal("%s line %d: Illegal MaxStartups spec.",
1310: filename, linenum);
1311: else
1312: options->max_startups = options->max_startups_begin;
1313: break;
1.133 dtucker 1314:
1315: case sMaxAuthTries:
1316: intptr = &options->max_authtries;
1317: goto parse_int;
1.94 markus 1318:
1.180 djm 1319: case sMaxSessions:
1320: intptr = &options->max_sessions;
1321: goto parse_int;
1322:
1.94 markus 1323: case sBanner:
1324: charptr = &options->banner;
1325: goto parse_filename;
1.176 djm 1326:
1.94 markus 1327: /*
1328: * These options can contain %X options expanded at
1329: * connect time, so that you can specify paths like:
1330: *
1331: * AuthorizedKeysFile /etc/ssh_keys/%u
1332: */
1333: case sAuthorizedKeysFile:
1.219 djm 1334: if (*activep && options->num_authkeys_files == 0) {
1335: while ((arg = strdelim(&cp)) && *arg != '\0') {
1336: if (options->num_authkeys_files >=
1337: MAX_AUTHKEYS_FILES)
1338: fatal("%s line %d: "
1339: "too many authorized keys files.",
1340: filename, linenum);
1341: options->authorized_keys_files[
1342: options->num_authkeys_files++] =
1343: tilde_expand_filename(arg, getuid());
1344: }
1345: }
1346: return 0;
1347:
1.208 djm 1348: case sAuthorizedPrincipalsFile:
1349: charptr = &options->authorized_principals_file;
1.205 djm 1350: arg = strdelim(&cp);
1351: if (!arg || *arg == '\0')
1352: fatal("%s line %d: missing file name.",
1353: filename, linenum);
1354: if (*activep && *charptr == NULL) {
1.206 markus 1355: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1356: /* increase optional counter */
1357: if (intptr != NULL)
1358: *intptr = *intptr + 1;
1359: }
1360: break;
1.94 markus 1361:
1362: case sClientAliveInterval:
1363: intptr = &options->client_alive_interval;
1364: goto parse_time;
1365:
1366: case sClientAliveCountMax:
1367: intptr = &options->client_alive_count_max;
1368: goto parse_int;
1.131 djm 1369:
1370: case sAcceptEnv:
1371: while ((arg = strdelim(&cp)) && *arg != '\0') {
1372: if (strchr(arg, '=') != NULL)
1373: fatal("%s line %d: Invalid environment name.",
1374: filename, linenum);
1375: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1376: fatal("%s line %d: too many allow env.",
1377: filename, linenum);
1.153 dtucker 1378: if (!*activep)
1.227 markus 1379: continue;
1.131 djm 1380: options->accept_env[options->num_accept_env++] =
1381: xstrdup(arg);
1382: }
1383: break;
1.145 reyk 1384:
1385: case sPermitTunnel:
1386: intptr = &options->permit_tun;
1.146 reyk 1387: arg = strdelim(&cp);
1388: if (!arg || *arg == '\0')
1389: fatal("%s line %d: Missing yes/point-to-point/"
1390: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1391: value = -1;
1392: for (i = 0; tunmode_desc[i].val != -1; i++)
1393: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1394: value = tunmode_desc[i].val;
1395: break;
1396: }
1397: if (value == -1)
1.146 reyk 1398: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1399: "no argument: %s", filename, linenum, arg);
1400: if (*intptr == -1)
1401: *intptr = value;
1402: break;
1.94 markus 1403:
1.153 dtucker 1404: case sMatch:
1405: if (cmdline)
1406: fatal("Match directive not supported as a command-line "
1407: "option");
1.226 dtucker 1408: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1409: if (value < 0)
1410: fatal("%s line %d: Bad Match condition", filename,
1411: linenum);
1412: *activep = value;
1.156 dtucker 1413: break;
1414:
1415: case sPermitOpen:
1416: arg = strdelim(&cp);
1417: if (!arg || *arg == '\0')
1418: fatal("%s line %d: missing PermitOpen specification",
1419: filename, linenum);
1.167 dtucker 1420: n = options->num_permitted_opens; /* modified later */
1.156 dtucker 1421: if (strcmp(arg, "any") == 0) {
1.167 dtucker 1422: if (*activep && n == -1) {
1.156 dtucker 1423: channel_clear_adm_permitted_opens();
1.159 dtucker 1424: options->num_permitted_opens = 0;
1.224 dtucker 1425: }
1426: break;
1427: }
1428: if (strcmp(arg, "none") == 0) {
1429: if (*activep && n == -1) {
1430: options->num_permitted_opens = 1;
1431: channel_disable_adm_local_opens();
1.159 dtucker 1432: }
1.156 dtucker 1433: break;
1434: }
1.166 dtucker 1435: if (*activep && n == -1)
1436: channel_clear_adm_permitted_opens();
1.159 dtucker 1437: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1438: p = hpdelim(&arg);
1439: if (p == NULL)
1440: fatal("%s line %d: missing host in PermitOpen",
1441: filename, linenum);
1442: p = cleanhostname(p);
1.223 dtucker 1443: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1444: fatal("%s line %d: bad port number in "
1445: "PermitOpen", filename, linenum);
1.166 dtucker 1446: if (*activep && n == -1)
1.159 dtucker 1447: options->num_permitted_opens =
1448: channel_add_adm_permitted_opens(p, port);
1449: }
1.153 dtucker 1450: break;
1451:
1.158 dtucker 1452: case sForceCommand:
1453: if (cp == NULL)
1454: fatal("%.200s line %d: Missing argument.", filename,
1455: linenum);
1456: len = strspn(cp, WHITESPACE);
1457: if (*activep && options->adm_forced_command == NULL)
1458: options->adm_forced_command = xstrdup(cp + len);
1459: return 0;
1460:
1.176 djm 1461: case sChrootDirectory:
1462: charptr = &options->chroot_directory;
1.177 djm 1463:
1464: arg = strdelim(&cp);
1465: if (!arg || *arg == '\0')
1466: fatal("%s line %d: missing file name.",
1467: filename, linenum);
1468: if (*activep && *charptr == NULL)
1469: *charptr = xstrdup(arg);
1470: break;
1.176 djm 1471:
1.204 djm 1472: case sTrustedUserCAKeys:
1473: charptr = &options->trusted_user_ca_keys;
1474: goto parse_filename;
1475:
1476: case sRevokedKeys:
1477: charptr = &options->revoked_keys_file;
1478: goto parse_filename;
1479:
1.213 djm 1480: case sIPQoS:
1481: arg = strdelim(&cp);
1482: if ((value = parse_ipqos(arg)) == -1)
1483: fatal("%s line %d: Bad IPQoS value: %s",
1484: filename, linenum, arg);
1485: arg = strdelim(&cp);
1486: if (arg == NULL)
1487: value2 = value;
1488: else if ((value2 = parse_ipqos(arg)) == -1)
1489: fatal("%s line %d: Bad IPQoS value: %s",
1490: filename, linenum, arg);
1491: if (*activep) {
1492: options->ip_qos_interactive = value;
1493: options->ip_qos_bulk = value2;
1494: }
1495: break;
1496:
1.225 djm 1497: case sVersionAddendum:
1498: if (cp == NULL)
1499: fatal("%.200s line %d: Missing argument.", filename,
1500: linenum);
1501: len = strspn(cp, WHITESPACE);
1502: if (*activep && options->version_addendum == NULL) {
1503: if (strcasecmp(cp + len, "none") == 0)
1504: options->version_addendum = xstrdup("");
1505: else if (strchr(cp + len, '\r') != NULL)
1506: fatal("%.200s line %d: Invalid argument",
1507: filename, linenum);
1508: else
1509: options->version_addendum = xstrdup(cp + len);
1510: }
1511: return 0;
1512:
1.231 djm 1513: case sAuthorizedKeysCommand:
1514: len = strspn(cp, WHITESPACE);
1515: if (*activep && options->authorized_keys_command == NULL) {
1516: if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0)
1517: fatal("%.200s line %d: AuthorizedKeysCommand "
1518: "must be an absolute path",
1519: filename, linenum);
1520: options->authorized_keys_command = xstrdup(cp + len);
1521: }
1522: return 0;
1523:
1524: case sAuthorizedKeysCommandUser:
1525: charptr = &options->authorized_keys_command_user;
1526:
1527: arg = strdelim(&cp);
1528: if (*activep && *charptr == NULL)
1529: *charptr = xstrdup(arg);
1530: break;
1531:
1.232 djm 1532: case sAuthenticationMethods:
1533: if (*activep && options->num_auth_methods == 0) {
1534: while ((arg = strdelim(&cp)) && *arg != '\0') {
1535: if (options->num_auth_methods >=
1536: MAX_AUTH_METHODS)
1537: fatal("%s line %d: "
1538: "too many authentication methods.",
1539: filename, linenum);
1540: if (auth2_methods_valid(arg, 0) != 0)
1541: fatal("%s line %d: invalid "
1542: "authentication method list.",
1543: filename, linenum);
1544: options->auth_methods[
1545: options->num_auth_methods++] = xstrdup(arg);
1546: }
1547: }
1548: return 0;
1549:
1.94 markus 1550: case sDeprecated:
1.117 itojun 1551: logit("%s line %d: Deprecated option %s",
1.121 jakob 1552: filename, linenum, arg);
1553: while (arg)
1554: arg = strdelim(&cp);
1555: break;
1556:
1557: case sUnsupported:
1558: logit("%s line %d: Unsupported option %s",
1.94 markus 1559: filename, linenum, arg);
1560: while (arg)
1561: arg = strdelim(&cp);
1562: break;
1563:
1564: default:
1565: fatal("%s line %d: Missing handler for opcode %s (%d)",
1566: filename, linenum, arg, opcode);
1567: }
1568: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1569: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1570: filename, linenum, arg);
1571: return 0;
1572: }
1573:
1574: /* Reads the server configuration file. */
1.25 markus 1575:
1.94 markus 1576: void
1.134 djm 1577: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1578: {
1.229 dtucker 1579: char line[4096], *cp;
1.94 markus 1580: FILE *f;
1.229 dtucker 1581: int lineno = 0;
1.81 stevesk 1582:
1.134 djm 1583: debug2("%s: filename %s", __func__, filename);
1584: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1585: perror(filename);
1586: exit(1);
1587: }
1.134 djm 1588: buffer_clear(conf);
1589: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 1590: lineno++;
1591: if (strlen(line) == sizeof(line) - 1)
1592: fatal("%s line %d too long", filename, lineno);
1.134 djm 1593: /*
1594: * Trim out comments and strip whitespace
1.135 deraadt 1595: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1596: * line numbers later for error messages
1597: */
1598: if ((cp = strchr(line, '#')) != NULL)
1599: memcpy(cp, "\n", 2);
1600: cp = line + strspn(line, " \t\r");
1601:
1602: buffer_append(conf, cp, strlen(cp));
1603: }
1604: buffer_append(conf, "\0", 1);
1605: fclose(f);
1606: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1607: }
1608:
1609: void
1.226 dtucker 1610: parse_server_match_config(ServerOptions *options,
1611: struct connection_info *connectinfo)
1.153 dtucker 1612: {
1613: ServerOptions mo;
1614:
1615: initialize_server_options(&mo);
1.226 dtucker 1616: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 1617: copy_set_server_options(options, &mo, 0);
1.153 dtucker 1618: }
1619:
1.226 dtucker 1620: int parse_server_match_testspec(struct connection_info *ci, char *spec)
1621: {
1622: char *p;
1623:
1624: while ((p = strsep(&spec, ",")) && *p != '\0') {
1625: if (strncmp(p, "addr=", 5) == 0) {
1626: ci->address = xstrdup(p + 5);
1627: } else if (strncmp(p, "host=", 5) == 0) {
1628: ci->host = xstrdup(p + 5);
1629: } else if (strncmp(p, "user=", 5) == 0) {
1630: ci->user = xstrdup(p + 5);
1631: } else if (strncmp(p, "laddr=", 6) == 0) {
1632: ci->laddress = xstrdup(p + 6);
1633: } else if (strncmp(p, "lport=", 6) == 0) {
1634: ci->lport = a2port(p + 6);
1635: if (ci->lport == -1) {
1636: fprintf(stderr, "Invalid port '%s' in test mode"
1637: " specification %s\n", p+6, p);
1638: return -1;
1639: }
1640: } else {
1641: fprintf(stderr, "Invalid test mode specification %s\n",
1642: p);
1643: return -1;
1644: }
1645: }
1646: return 0;
1647: }
1648:
1649: /*
1650: * returns 1 for a complete spec, 0 for partial spec and -1 for an
1651: * empty spec.
1652: */
1653: int server_match_spec_complete(struct connection_info *ci)
1654: {
1655: if (ci->user && ci->host && ci->address)
1656: return 1; /* complete */
1657: if (!ci->user && !ci->host && !ci->address)
1658: return -1; /* empty */
1659: return 0; /* partial */
1660: }
1661:
1.168 dtucker 1662: /* Helper macros */
1663: #define M_CP_INTOPT(n) do {\
1664: if (src->n != -1) \
1665: dst->n = src->n; \
1666: } while (0)
1667: #define M_CP_STROPT(n) do {\
1668: if (src->n != NULL) { \
1669: if (dst->n != NULL) \
1670: xfree(dst->n); \
1671: dst->n = src->n; \
1672: } \
1673: } while(0)
1.219 djm 1674: #define M_CP_STRARRAYOPT(n, num_n) do {\
1675: if (src->num_n != 0) { \
1676: for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \
1677: dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \
1678: } \
1679: } while(0)
1.168 dtucker 1680:
1681: /*
1682: * Copy any supported values that are set.
1683: *
1.195 jj 1684: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 1685: * array values that are not used pre-authentication, because any that we
1686: * do use must be explictly sent in mm_getpwnamallow().
1687: */
1.153 dtucker 1688: void
1.168 dtucker 1689: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 1690: {
1.168 dtucker 1691: M_CP_INTOPT(password_authentication);
1692: M_CP_INTOPT(gss_authentication);
1693: M_CP_INTOPT(rsa_authentication);
1694: M_CP_INTOPT(pubkey_authentication);
1695: M_CP_INTOPT(kerberos_authentication);
1696: M_CP_INTOPT(hostbased_authentication);
1.209 djm 1697: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 1698: M_CP_INTOPT(kbd_interactive_authentication);
1.190 djm 1699: M_CP_INTOPT(zero_knowledge_password_authentication);
1.231 djm 1700: M_CP_STROPT(authorized_keys_command);
1701: M_CP_STROPT(authorized_keys_command_user);
1.175 dtucker 1702: M_CP_INTOPT(permit_root_login);
1.188 djm 1703: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 1704:
1705: M_CP_INTOPT(allow_tcp_forwarding);
1.178 pyr 1706: M_CP_INTOPT(allow_agent_forwarding);
1.209 djm 1707: M_CP_INTOPT(permit_tun);
1.168 dtucker 1708: M_CP_INTOPT(gateway_ports);
1709: M_CP_INTOPT(x11_display_offset);
1710: M_CP_INTOPT(x11_forwarding);
1711: M_CP_INTOPT(x11_use_localhost);
1.180 djm 1712: M_CP_INTOPT(max_sessions);
1.184 dtucker 1713: M_CP_INTOPT(max_authtries);
1.213 djm 1714: M_CP_INTOPT(ip_qos_interactive);
1715: M_CP_INTOPT(ip_qos_bulk);
1.235 dtucker 1716: M_CP_INTOPT(rekey_limit);
1717: M_CP_INTOPT(rekey_interval);
1.168 dtucker 1718:
1.218 djm 1719: /* See comment in servconf.h */
1720: COPY_MATCH_STRING_OPTS();
1.216 djm 1721:
1.217 dtucker 1722: /*
1723: * The only things that should be below this point are string options
1724: * which are only used after authentication.
1725: */
1.168 dtucker 1726: if (preauth)
1727: return;
1.219 djm 1728:
1.168 dtucker 1729: M_CP_STROPT(adm_forced_command);
1.176 djm 1730: M_CP_STROPT(chroot_directory);
1.153 dtucker 1731: }
1.168 dtucker 1732:
1733: #undef M_CP_INTOPT
1734: #undef M_CP_STROPT
1.219 djm 1735: #undef M_CP_STRARRAYOPT
1.153 dtucker 1736:
1737: void
1738: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 1739: struct connection_info *connectinfo)
1.134 djm 1740: {
1.153 dtucker 1741: int active, linenum, bad_options = 0;
1.136 dtucker 1742: char *cp, *obuf, *cbuf;
1.134 djm 1743:
1744: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1745:
1.136 dtucker 1746: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.226 dtucker 1747: active = connectinfo ? 0 : 1;
1.137 dtucker 1748: linenum = 1;
1.140 deraadt 1749: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1750: if (process_server_config_line(options, cp, filename,
1.226 dtucker 1751: linenum++, &active, connectinfo) != 0)
1.94 markus 1752: bad_options++;
1.1 deraadt 1753: }
1.136 dtucker 1754: xfree(obuf);
1.78 stevesk 1755: if (bad_options > 0)
1756: fatal("%s: terminating, %d bad configuration options",
1757: filename, bad_options);
1.182 dtucker 1758: }
1759:
1760: static const char *
1.221 djm 1761: fmt_multistate_int(int val, const struct multistate *m)
1762: {
1763: u_int i;
1764:
1765: for (i = 0; m[i].key != NULL; i++) {
1766: if (m[i].value == val)
1767: return m[i].key;
1768: }
1769: return "UNKNOWN";
1770: }
1771:
1772: static const char *
1.182 dtucker 1773: fmt_intarg(ServerOpCodes code, int val)
1774: {
1.221 djm 1775: if (val == -1)
1776: return "unset";
1777: switch (code) {
1778: case sAddressFamily:
1779: return fmt_multistate_int(val, multistate_addressfamily);
1780: case sPermitRootLogin:
1781: return fmt_multistate_int(val, multistate_permitrootlogin);
1782: case sGatewayPorts:
1783: return fmt_multistate_int(val, multistate_gatewayports);
1784: case sCompression:
1785: return fmt_multistate_int(val, multistate_compression);
1.222 djm 1786: case sUsePrivilegeSeparation:
1787: return fmt_multistate_int(val, multistate_privsep);
1.233 djm 1788: case sAllowTcpForwarding:
1789: return fmt_multistate_int(val, multistate_tcpfwd);
1.221 djm 1790: case sProtocol:
1.182 dtucker 1791: switch (val) {
1792: case SSH_PROTO_1:
1793: return "1";
1794: case SSH_PROTO_2:
1795: return "2";
1796: case (SSH_PROTO_1|SSH_PROTO_2):
1797: return "2,1";
1798: default:
1799: return "UNKNOWN";
1800: }
1.221 djm 1801: default:
1802: switch (val) {
1803: case 0:
1804: return "no";
1805: case 1:
1806: return "yes";
1807: default:
1808: return "UNKNOWN";
1809: }
1.182 dtucker 1810: }
1811: }
1812:
1813: static const char *
1814: lookup_opcode_name(ServerOpCodes code)
1815: {
1816: u_int i;
1817:
1818: for (i = 0; keywords[i].name != NULL; i++)
1819: if (keywords[i].opcode == code)
1820: return(keywords[i].name);
1821: return "UNKNOWN";
1822: }
1823:
1824: static void
1825: dump_cfg_int(ServerOpCodes code, int val)
1826: {
1827: printf("%s %d\n", lookup_opcode_name(code), val);
1828: }
1829:
1830: static void
1831: dump_cfg_fmtint(ServerOpCodes code, int val)
1832: {
1833: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
1834: }
1835:
1836: static void
1837: dump_cfg_string(ServerOpCodes code, const char *val)
1838: {
1839: if (val == NULL)
1840: return;
1841: printf("%s %s\n", lookup_opcode_name(code), val);
1842: }
1843:
1844: static void
1845: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
1846: {
1847: u_int i;
1848:
1849: for (i = 0; i < count; i++)
1.219 djm 1850: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
1851: }
1852:
1853: static void
1854: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
1855: {
1856: u_int i;
1857:
1858: printf("%s", lookup_opcode_name(code));
1859: for (i = 0; i < count; i++)
1860: printf(" %s", vals[i]);
1861: printf("\n");
1.182 dtucker 1862: }
1863:
1864: void
1865: dump_config(ServerOptions *o)
1866: {
1867: u_int i;
1868: int ret;
1869: struct addrinfo *ai;
1870: char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL;
1871:
1872: /* these are usually at the top of the config */
1873: for (i = 0; i < o->num_ports; i++)
1874: printf("port %d\n", o->ports[i]);
1875: dump_cfg_fmtint(sProtocol, o->protocol);
1876: dump_cfg_fmtint(sAddressFamily, o->address_family);
1877:
1878: /* ListenAddress must be after Port */
1879: for (ai = o->listen_addrs; ai; ai = ai->ai_next) {
1880: if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1881: sizeof(addr), port, sizeof(port),
1882: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1883: error("getnameinfo failed: %.100s",
1884: (ret != EAI_SYSTEM) ? gai_strerror(ret) :
1885: strerror(errno));
1886: } else {
1887: if (ai->ai_family == AF_INET6)
1888: printf("listenaddress [%s]:%s\n", addr, port);
1889: else
1890: printf("listenaddress %s:%s\n", addr, port);
1891: }
1892: }
1893:
1894: /* integer arguments */
1895: dump_cfg_int(sServerKeyBits, o->server_key_bits);
1896: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
1897: dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time);
1898: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
1899: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 1900: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 1901: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
1902: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1903:
1904: /* formatted integer arguments */
1905: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
1906: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
1907: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
1908: dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication);
1909: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
1910: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
1911: o->hostbased_uses_name_from_packet_only);
1912: dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication);
1913: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 1914: #ifdef KRB5
1.182 dtucker 1915: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
1916: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
1917: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
1918: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 1919: #endif
1920: #ifdef GSSAPI
1.182 dtucker 1921: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
1922: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.190 djm 1923: #endif
1924: #ifdef JPAKE
1925: dump_cfg_fmtint(sZeroKnowledgePasswordAuthentication,
1926: o->zero_knowledge_password_authentication);
1.187 djm 1927: #endif
1.182 dtucker 1928: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
1929: dump_cfg_fmtint(sKbdInteractiveAuthentication,
1930: o->kbd_interactive_authentication);
1931: dump_cfg_fmtint(sChallengeResponseAuthentication,
1932: o->challenge_response_authentication);
1933: dump_cfg_fmtint(sPrintMotd, o->print_motd);
1934: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
1935: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
1936: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1937: dump_cfg_fmtint(sStrictModes, o->strict_modes);
1938: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
1939: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
1940: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
1941: dump_cfg_fmtint(sUseLogin, o->use_login);
1942: dump_cfg_fmtint(sCompression, o->compression);
1943: dump_cfg_fmtint(sGatewayPorts, o->gateway_ports);
1944: dump_cfg_fmtint(sUseDNS, o->use_dns);
1945: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1946: dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
1947:
1948: /* string arguments */
1949: dump_cfg_string(sPidFile, o->pid_file);
1950: dump_cfg_string(sXAuthLocation, o->xauth_location);
1951: dump_cfg_string(sCiphers, o->ciphers);
1952: dump_cfg_string(sMacs, o->macs);
1953: dump_cfg_string(sBanner, o->banner);
1954: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 1955: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 1956: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
1957: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 1958: dump_cfg_string(sAuthorizedPrincipalsFile,
1959: o->authorized_principals_file);
1.225 djm 1960: dump_cfg_string(sVersionAddendum, o->version_addendum);
1.231 djm 1961: dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
1962: dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
1.182 dtucker 1963:
1964: /* string arguments requiring a lookup */
1965: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
1966: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
1967:
1968: /* string array arguments */
1.219 djm 1969: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
1970: o->authorized_keys_files);
1.182 dtucker 1971: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
1972: o->host_key_files);
1.203 djm 1973: dump_cfg_strarray(sHostKeyFile, o->num_host_cert_files,
1974: o->host_cert_files);
1.182 dtucker 1975: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
1976: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
1977: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
1978: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
1979: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1.232 djm 1980: dump_cfg_strarray_oneline(sAuthenticationMethods,
1981: o->num_auth_methods, o->auth_methods);
1.182 dtucker 1982:
1983: /* other arguments */
1984: for (i = 0; i < o->num_subsystems; i++)
1985: printf("subsystem %s %s\n", o->subsystem_name[i],
1986: o->subsystem_args[i]);
1987:
1988: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
1989: o->max_startups_rate, o->max_startups);
1990:
1991: for (i = 0; tunmode_desc[i].val != -1; i++)
1992: if (tunmode_desc[i].val == o->permit_tun) {
1993: s = tunmode_desc[i].text;
1994: break;
1995: }
1996: dump_cfg_string(sPermitTunnel, s);
1.213 djm 1997:
1.214 stevesk 1998: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
1999: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.235 dtucker 2000:
2001: printf("rekeylimit %lld %d\n", o->rekey_limit, o->rekey_interval);
1.182 dtucker 2002:
2003: channel_print_adm_permitted_opens();
1.1 deraadt 2004: }
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