Annotation of src/usr.bin/ssh/servconf.c, Revision 1.230
1.226 dtucker 1:
1.230 ! dtucker 2: /* $OpenBSD: servconf.c,v 1.229 2012/07/13 01:35:21 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:
1.154 stevesk 22: #include <netdb.h>
1.165 dtucker 23: #include <pwd.h>
1.162 stevesk 24: #include <stdio.h>
1.161 stevesk 25: #include <stdlib.h>
1.160 stevesk 26: #include <string.h>
1.164 deraadt 27: #include <signal.h>
1.155 stevesk 28: #include <unistd.h>
1.164 deraadt 29: #include <stdarg.h>
1.182 dtucker 30: #include <errno.h>
1.1 deraadt 31:
1.164 deraadt 32: #include "xmalloc.h"
1.1 deraadt 33: #include "ssh.h"
1.62 markus 34: #include "log.h"
1.164 deraadt 35: #include "buffer.h"
1.1 deraadt 36: #include "servconf.h"
1.33 markus 37: #include "compat.h"
1.60 markus 38: #include "pathnames.h"
1.62 markus 39: #include "misc.h"
40: #include "cipher.h"
1.164 deraadt 41: #include "key.h"
1.66 markus 42: #include "kex.h"
43: #include "mac.h"
1.153 dtucker 44: #include "match.h"
1.156 dtucker 45: #include "channels.h"
1.165 dtucker 46: #include "groupaccess.h"
1.226 dtucker 47: #include "canohost.h"
48: #include "packet.h"
1.1 deraadt 49:
1.194 djm 50: static void add_listen_addr(ServerOptions *, char *, int);
51: static void add_one_listen_addr(ServerOptions *, char *, int);
1.29 markus 52:
1.102 provos 53: /* Use of privilege separation or not */
54: extern int use_privsep;
1.153 dtucker 55: extern Buffer cfg;
1.62 markus 56:
1.1 deraadt 57: /* Initializes the server options to their default values. */
58:
1.34 markus 59: void
1.25 markus 60: initialize_server_options(ServerOptions *options)
1.1 deraadt 61: {
1.25 markus 62: memset(options, 0, sizeof(*options));
1.29 markus 63: options->num_ports = 0;
64: options->ports_from_cmdline = 0;
65: options->listen_addrs = NULL;
1.138 djm 66: options->address_family = -1;
1.54 markus 67: options->num_host_key_files = 0;
1.203 djm 68: options->num_host_cert_files = 0;
1.36 markus 69: options->pid_file = NULL;
1.25 markus 70: options->server_key_bits = -1;
71: options->login_grace_time = -1;
72: options->key_regeneration_time = -1;
1.67 markus 73: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 74: options->ignore_rhosts = -1;
75: options->ignore_user_known_hosts = -1;
76: options->print_motd = -1;
1.72 stevesk 77: options->print_lastlog = -1;
1.25 markus 78: options->x11_forwarding = -1;
79: options->x11_display_offset = -1;
1.99 stevesk 80: options->x11_use_localhost = -1;
1.42 markus 81: options->xauth_location = NULL;
1.25 markus 82: options->strict_modes = -1;
1.129 markus 83: options->tcp_keep_alive = -1;
1.101 markus 84: options->log_facility = SYSLOG_FACILITY_NOT_SET;
85: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 86: options->rhosts_rsa_authentication = -1;
1.75 markus 87: options->hostbased_authentication = -1;
88: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 89: options->rsa_authentication = -1;
1.54 markus 90: options->pubkey_authentication = -1;
1.25 markus 91: options->kerberos_authentication = -1;
92: options->kerberos_or_local_passwd = -1;
93: options->kerberos_ticket_cleanup = -1;
1.130 jakob 94: options->kerberos_get_afs_token = -1;
1.125 markus 95: options->gss_authentication=-1;
96: options->gss_cleanup_creds = -1;
1.25 markus 97: options->password_authentication = -1;
1.52 markus 98: options->kbd_interactive_authentication = -1;
1.80 markus 99: options->challenge_response_authentication = -1;
1.25 markus 100: options->permit_empty_passwd = -1;
1.113 markus 101: options->permit_user_env = -1;
1.25 markus 102: options->use_login = -1;
1.111 markus 103: options->compression = -1;
1.53 markus 104: options->allow_tcp_forwarding = -1;
1.178 pyr 105: options->allow_agent_forwarding = -1;
1.25 markus 106: options->num_allow_users = 0;
107: options->num_deny_users = 0;
108: options->num_allow_groups = 0;
109: options->num_deny_groups = 0;
1.33 markus 110: options->ciphers = NULL;
1.66 markus 111: options->macs = NULL;
1.211 djm 112: options->kex_algorithms = NULL;
1.33 markus 113: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 114: options->gateway_ports = -1;
1.43 jakob 115: options->num_subsystems = 0;
1.50 markus 116: options->max_startups_begin = -1;
117: options->max_startups_rate = -1;
1.46 markus 118: options->max_startups = -1;
1.133 dtucker 119: options->max_authtries = -1;
1.180 djm 120: options->max_sessions = -1;
1.57 markus 121: options->banner = NULL;
1.122 markus 122: options->use_dns = -1;
1.77 beck 123: options->client_alive_interval = -1;
124: options->client_alive_count_max = -1;
1.219 djm 125: options->num_authkeys_files = 0;
1.131 djm 126: options->num_accept_env = 0;
1.145 reyk 127: options->permit_tun = -1;
1.159 dtucker 128: options->num_permitted_opens = -1;
1.158 dtucker 129: options->adm_forced_command = NULL;
1.176 djm 130: options->chroot_directory = NULL;
1.190 djm 131: options->zero_knowledge_password_authentication = -1;
1.204 djm 132: options->revoked_keys_file = NULL;
133: options->trusted_user_ca_keys = NULL;
1.208 djm 134: options->authorized_principals_file = NULL;
1.213 djm 135: options->ip_qos_interactive = -1;
136: options->ip_qos_bulk = -1;
1.225 djm 137: options->version_addendum = NULL;
1.1 deraadt 138: }
139:
1.34 markus 140: void
1.25 markus 141: fill_default_server_options(ServerOptions *options)
1.1 deraadt 142: {
1.54 markus 143: if (options->protocol == SSH_PROTO_UNKNOWN)
1.196 markus 144: options->protocol = SSH_PROTO_2;
1.54 markus 145: if (options->num_host_key_files == 0) {
146: /* fill default hostkeys for protocols */
147: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 148: options->host_key_files[options->num_host_key_files++] =
149: _PATH_HOST_KEY_FILE;
150: if (options->protocol & SSH_PROTO_2) {
151: options->host_key_files[options->num_host_key_files++] =
152: _PATH_HOST_RSA_KEY_FILE;
153: options->host_key_files[options->num_host_key_files++] =
154: _PATH_HOST_DSA_KEY_FILE;
1.210 naddy 155: options->host_key_files[options->num_host_key_files++] =
156: _PATH_HOST_ECDSA_KEY_FILE;
1.97 stevesk 157: }
1.54 markus 158: }
1.203 djm 159: /* No certificates by default */
1.29 markus 160: if (options->num_ports == 0)
161: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
162: if (options->listen_addrs == NULL)
1.76 stevesk 163: add_listen_addr(options, NULL, 0);
1.36 markus 164: if (options->pid_file == NULL)
1.60 markus 165: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 166: if (options->server_key_bits == -1)
1.185 djm 167: options->server_key_bits = 1024;
1.25 markus 168: if (options->login_grace_time == -1)
1.115 stevesk 169: options->login_grace_time = 120;
1.25 markus 170: if (options->key_regeneration_time == -1)
171: options->key_regeneration_time = 3600;
1.67 markus 172: if (options->permit_root_login == PERMIT_NOT_SET)
173: options->permit_root_login = PERMIT_YES;
1.25 markus 174: if (options->ignore_rhosts == -1)
1.30 markus 175: options->ignore_rhosts = 1;
1.25 markus 176: if (options->ignore_user_known_hosts == -1)
177: options->ignore_user_known_hosts = 0;
178: if (options->print_motd == -1)
179: options->print_motd = 1;
1.72 stevesk 180: if (options->print_lastlog == -1)
181: options->print_lastlog = 1;
1.25 markus 182: if (options->x11_forwarding == -1)
1.30 markus 183: options->x11_forwarding = 0;
1.25 markus 184: if (options->x11_display_offset == -1)
1.30 markus 185: options->x11_display_offset = 10;
1.99 stevesk 186: if (options->x11_use_localhost == -1)
187: options->x11_use_localhost = 1;
1.42 markus 188: if (options->xauth_location == NULL)
1.83 markus 189: options->xauth_location = _PATH_XAUTH;
1.25 markus 190: if (options->strict_modes == -1)
191: options->strict_modes = 1;
1.129 markus 192: if (options->tcp_keep_alive == -1)
193: options->tcp_keep_alive = 1;
1.101 markus 194: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 195: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 196: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 197: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 198: if (options->rhosts_rsa_authentication == -1)
1.30 markus 199: options->rhosts_rsa_authentication = 0;
1.75 markus 200: if (options->hostbased_authentication == -1)
201: options->hostbased_authentication = 0;
202: if (options->hostbased_uses_name_from_packet_only == -1)
203: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 204: if (options->rsa_authentication == -1)
205: options->rsa_authentication = 1;
1.54 markus 206: if (options->pubkey_authentication == -1)
207: options->pubkey_authentication = 1;
1.25 markus 208: if (options->kerberos_authentication == -1)
1.107 markus 209: options->kerberos_authentication = 0;
1.25 markus 210: if (options->kerberos_or_local_passwd == -1)
211: options->kerberos_or_local_passwd = 1;
212: if (options->kerberos_ticket_cleanup == -1)
213: options->kerberos_ticket_cleanup = 1;
1.130 jakob 214: if (options->kerberos_get_afs_token == -1)
215: options->kerberos_get_afs_token = 0;
1.125 markus 216: if (options->gss_authentication == -1)
217: options->gss_authentication = 0;
218: if (options->gss_cleanup_creds == -1)
219: options->gss_cleanup_creds = 1;
1.25 markus 220: if (options->password_authentication == -1)
221: options->password_authentication = 1;
1.52 markus 222: if (options->kbd_interactive_authentication == -1)
223: options->kbd_interactive_authentication = 0;
1.80 markus 224: if (options->challenge_response_authentication == -1)
225: options->challenge_response_authentication = 1;
1.25 markus 226: if (options->permit_empty_passwd == -1)
1.30 markus 227: options->permit_empty_passwd = 0;
1.113 markus 228: if (options->permit_user_env == -1)
229: options->permit_user_env = 0;
1.25 markus 230: if (options->use_login == -1)
231: options->use_login = 0;
1.111 markus 232: if (options->compression == -1)
1.143 markus 233: options->compression = COMP_DELAYED;
1.53 markus 234: if (options->allow_tcp_forwarding == -1)
235: options->allow_tcp_forwarding = 1;
1.178 pyr 236: if (options->allow_agent_forwarding == -1)
237: options->allow_agent_forwarding = 1;
1.38 markus 238: if (options->gateway_ports == -1)
239: options->gateway_ports = 0;
1.46 markus 240: if (options->max_startups == -1)
241: options->max_startups = 10;
1.50 markus 242: if (options->max_startups_rate == -1)
243: options->max_startups_rate = 100; /* 100% */
244: if (options->max_startups_begin == -1)
245: options->max_startups_begin = options->max_startups;
1.133 dtucker 246: if (options->max_authtries == -1)
247: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.180 djm 248: if (options->max_sessions == -1)
249: options->max_sessions = DEFAULT_SESSIONS_MAX;
1.122 markus 250: if (options->use_dns == -1)
251: options->use_dns = 1;
1.77 beck 252: if (options->client_alive_interval == -1)
1.95 deraadt 253: options->client_alive_interval = 0;
1.77 beck 254: if (options->client_alive_count_max == -1)
255: options->client_alive_count_max = 3;
1.219 djm 256: if (options->num_authkeys_files == 0) {
257: options->authorized_keys_files[options->num_authkeys_files++] =
258: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS);
259: options->authorized_keys_files[options->num_authkeys_files++] =
260: xstrdup(_PATH_SSH_USER_PERMITTED_KEYS2);
261: }
1.145 reyk 262: if (options->permit_tun == -1)
1.146 reyk 263: options->permit_tun = SSH_TUNMODE_NO;
1.190 djm 264: if (options->zero_knowledge_password_authentication == -1)
265: options->zero_knowledge_password_authentication = 0;
1.213 djm 266: if (options->ip_qos_interactive == -1)
267: options->ip_qos_interactive = IPTOS_LOWDELAY;
268: if (options->ip_qos_bulk == -1)
269: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.225 djm 270: if (options->version_addendum == NULL)
271: options->version_addendum = xstrdup("");
1.110 markus 272: /* Turn privilege separation on by default */
1.102 provos 273: if (use_privsep == -1)
1.228 djm 274: use_privsep = PRIVSEP_NOSANDBOX;
1.1 deraadt 275: }
276:
277: /* Keyword tokens. */
1.25 markus 278: typedef enum {
279: sBadOption, /* == unknown option */
280: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
281: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 282: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 283: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 284: sKerberosGetAFSToken,
1.123 markus 285: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 286: sPasswordAuthentication, sKbdInteractiveAuthentication,
287: sListenAddress, sAddressFamily,
1.72 stevesk 288: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 289: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 290: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 291: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 292: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 293: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 294: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
1.180 djm 295: sMaxStartups, sMaxAuthTries, sMaxSessions,
1.122 markus 296: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 297: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.219 djm 298: sClientAliveCountMax, sAuthorizedKeysFile,
1.145 reyk 299: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.176 djm 300: sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
1.200 dtucker 301: sUsePrivilegeSeparation, sAllowAgentForwarding,
1.203 djm 302: sZeroKnowledgePasswordAuthentication, sHostCertificate,
1.208 djm 303: sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
1.225 djm 304: sKexAlgorithms, sIPQoS, sVersionAddendum,
1.121 jakob 305: sDeprecated, sUnsupported
1.1 deraadt 306: } ServerOpCodes;
307:
1.153 dtucker 308: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
309: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
310: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
311:
1.1 deraadt 312: /* Textual representation of the tokens. */
1.25 markus 313: static struct {
314: const char *name;
315: ServerOpCodes opcode;
1.153 dtucker 316: u_int flags;
1.25 markus 317: } keywords[] = {
1.153 dtucker 318: { "port", sPort, SSHCFG_GLOBAL },
319: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
320: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
321: { "pidfile", sPidFile, SSHCFG_GLOBAL },
322: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
323: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
324: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
1.175 dtucker 325: { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
1.153 dtucker 326: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
327: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
328: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
1.168 dtucker 329: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL },
330: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
1.209 djm 331: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
1.168 dtucker 332: { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL },
333: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
1.153 dtucker 334: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 335: #ifdef KRB5
1.168 dtucker 336: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
1.153 dtucker 337: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
338: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
339: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 340: #else
1.168 dtucker 341: { "kerberosauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 342: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
343: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
344: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 345: #endif
1.153 dtucker 346: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
347: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 348: #ifdef GSSAPI
1.168 dtucker 349: { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
1.153 dtucker 350: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.125 markus 351: #else
1.168 dtucker 352: { "gssapiauthentication", sUnsupported, SSHCFG_ALL },
1.153 dtucker 353: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 354: #endif
1.168 dtucker 355: { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
356: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
1.170 dtucker 357: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
1.153 dtucker 358: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
1.190 djm 359: #ifdef JPAKE
360: { "zeroknowledgepasswordauthentication", sZeroKnowledgePasswordAuthentication, SSHCFG_ALL },
361: #else
362: { "zeroknowledgepasswordauthentication", sUnsupported, SSHCFG_ALL },
363: #endif
1.153 dtucker 364: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
365: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
366: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
367: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
368: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
369: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
370: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 371: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
372: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
373: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 374: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
375: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
1.188 djm 376: { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
1.153 dtucker 377: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
378: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
379: { "compression", sCompression, SSHCFG_GLOBAL },
380: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
381: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
382: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
1.178 pyr 383: { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
1.227 markus 384: { "allowusers", sAllowUsers, SSHCFG_ALL },
385: { "denyusers", sDenyUsers, SSHCFG_ALL },
386: { "allowgroups", sAllowGroups, SSHCFG_ALL },
387: { "denygroups", sDenyGroups, SSHCFG_ALL },
1.153 dtucker 388: { "ciphers", sCiphers, SSHCFG_GLOBAL },
389: { "macs", sMacs, SSHCFG_GLOBAL },
390: { "protocol", sProtocol, SSHCFG_GLOBAL },
391: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
392: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
393: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
1.184 dtucker 394: { "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
1.180 djm 395: { "maxsessions", sMaxSessions, SSHCFG_ALL },
1.168 dtucker 396: { "banner", sBanner, SSHCFG_ALL },
1.153 dtucker 397: { "usedns", sUseDNS, SSHCFG_GLOBAL },
398: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
399: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
400: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
401: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
1.209 djm 402: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
1.219 djm 403: { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
1.153 dtucker 404: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
1.227 markus 405: { "acceptenv", sAcceptEnv, SSHCFG_ALL },
1.209 djm 406: { "permittunnel", sPermitTunnel, SSHCFG_ALL },
1.153 dtucker 407: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 408: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 409: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.176 djm 410: { "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
1.203 djm 411: { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
1.204 djm 412: { "revokedkeys", sRevokedKeys, SSHCFG_ALL },
413: { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
1.209 djm 414: { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
1.211 djm 415: { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
1.213 djm 416: { "ipqos", sIPQoS, SSHCFG_ALL },
1.225 djm 417: { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
1.153 dtucker 418: { NULL, sBadOption, 0 }
1.1 deraadt 419: };
420:
1.182 dtucker 421: static struct {
422: int val;
423: char *text;
424: } tunmode_desc[] = {
425: { SSH_TUNMODE_NO, "no" },
426: { SSH_TUNMODE_POINTOPOINT, "point-to-point" },
427: { SSH_TUNMODE_ETHERNET, "ethernet" },
428: { SSH_TUNMODE_YES, "yes" },
429: { -1, NULL }
430: };
431:
1.27 markus 432: /*
1.73 stevesk 433: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 434: */
1.1 deraadt 435:
1.34 markus 436: static ServerOpCodes
1.25 markus 437: parse_token(const char *cp, const char *filename,
1.153 dtucker 438: int linenum, u_int *flags)
1.1 deraadt 439: {
1.55 markus 440: u_int i;
1.1 deraadt 441:
1.25 markus 442: for (i = 0; keywords[i].name; i++)
1.153 dtucker 443: if (strcasecmp(cp, keywords[i].name) == 0) {
444: *flags = keywords[i].flags;
1.25 markus 445: return keywords[i].opcode;
1.153 dtucker 446: }
1.25 markus 447:
1.78 stevesk 448: error("%s: line %d: Bad configuration option: %s",
449: filename, linenum, cp);
1.25 markus 450: return sBadOption;
1.1 deraadt 451: }
452:
1.202 djm 453: char *
454: derelativise_path(const char *path)
455: {
1.207 djm 456: char *expanded, *ret, cwd[MAXPATHLEN];
1.202 djm 457:
458: expanded = tilde_expand_filename(path, getuid());
459: if (*expanded == '/')
460: return expanded;
1.207 djm 461: if (getcwd(cwd, sizeof(cwd)) == NULL)
1.202 djm 462: fatal("%s: getcwd: %s", __func__, strerror(errno));
463: xasprintf(&ret, "%s/%s", cwd, expanded);
464: xfree(expanded);
465: return ret;
466: }
467:
1.84 itojun 468: static void
1.194 djm 469: add_listen_addr(ServerOptions *options, char *addr, int port)
1.74 stevesk 470: {
1.142 djm 471: u_int i;
1.74 stevesk 472:
473: if (options->num_ports == 0)
474: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 475: if (options->address_family == -1)
476: options->address_family = AF_UNSPEC;
1.76 stevesk 477: if (port == 0)
1.74 stevesk 478: for (i = 0; i < options->num_ports; i++)
479: add_one_listen_addr(options, addr, options->ports[i]);
480: else
1.76 stevesk 481: add_one_listen_addr(options, addr, port);
1.74 stevesk 482: }
483:
1.84 itojun 484: static void
1.194 djm 485: add_one_listen_addr(ServerOptions *options, char *addr, int port)
1.29 markus 486: {
487: struct addrinfo hints, *ai, *aitop;
488: char strport[NI_MAXSERV];
489: int gaierr;
490:
1.74 stevesk 491: memset(&hints, 0, sizeof(hints));
1.138 djm 492: hints.ai_family = options->address_family;
1.74 stevesk 493: hints.ai_socktype = SOCK_STREAM;
494: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.194 djm 495: snprintf(strport, sizeof strport, "%d", port);
1.74 stevesk 496: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
497: fatal("bad addr or host: %s (%s)",
498: addr ? addr : "<NULL>",
1.173 dtucker 499: ssh_gai_strerror(gaierr));
1.74 stevesk 500: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
501: ;
502: ai->ai_next = options->listen_addrs;
503: options->listen_addrs = aitop;
1.29 markus 504: }
505:
1.226 dtucker 506: struct connection_info *
507: get_connection_info(int populate, int use_dns)
508: {
509: static struct connection_info ci;
510:
511: if (!populate)
512: return &ci;
513: ci.host = get_canonical_hostname(use_dns);
514: ci.address = get_remote_ipaddr();
515: ci.laddress = get_local_ipaddr(packet_get_connection_in());
516: ci.lport = get_local_port();
517: return &ci;
518: }
519:
1.153 dtucker 520: /*
521: * The strategy for the Match blocks is that the config file is parsed twice.
522: *
523: * The first time is at startup. activep is initialized to 1 and the
524: * directives in the global context are processed and acted on. Hitting a
525: * Match directive unsets activep and the directives inside the block are
526: * checked for syntax only.
527: *
528: * The second time is after a connection has been established but before
529: * authentication. activep is initialized to 2 and global config directives
530: * are ignored since they have already been processed. If the criteria in a
531: * Match block is met, activep is set and the subsequent directives
532: * processed and actioned until EOF or another Match block unsets it. Any
533: * options set are copied into the main server config.
534: *
535: * Potential additions/improvements:
536: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
537: *
538: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
539: * Match Address 192.168.0.*
540: * Tag trusted
541: * Match Group wheel
542: * Tag trusted
543: * Match Tag trusted
544: * AllowTcpForwarding yes
545: * GatewayPorts clientspecified
546: * [...]
547: *
548: * - Add a PermittedChannelRequests directive
549: * Match Group shell
550: * PermittedChannelRequests session,forwarded-tcpip
551: */
552:
553: static int
1.165 dtucker 554: match_cfg_line_group(const char *grps, int line, const char *user)
555: {
556: int result = 0;
557: struct passwd *pw;
558:
559: if (user == NULL)
560: goto out;
561:
562: if ((pw = getpwnam(user)) == NULL) {
563: debug("Can't match group at line %d because user %.100s does "
564: "not exist", line, user);
565: } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
566: debug("Can't Match group because user %.100s not in any group "
567: "at line %d", user, line);
1.186 djm 568: } else if (ga_match_pattern_list(grps) != 1) {
569: debug("user %.100s does not match group list %.100s at line %d",
570: user, grps, line);
1.165 dtucker 571: } else {
1.186 djm 572: debug("user %.100s matched group list %.100s at line %d", user,
573: grps, line);
1.165 dtucker 574: result = 1;
575: }
576: out:
577: ga_free();
578: return result;
579: }
580:
1.226 dtucker 581: /*
1.230 ! dtucker 582: * All of the attributes on a single Match line are ANDed together, so we need
! 583: * to check every * attribute and set the result to zero if any attribute does
! 584: * not match.
1.226 dtucker 585: */
1.165 dtucker 586: static int
1.226 dtucker 587: match_cfg_line(char **condition, int line, struct connection_info *ci)
1.153 dtucker 588: {
1.226 dtucker 589: int result = 1, port;
1.153 dtucker 590: char *arg, *attrib, *cp = *condition;
591: size_t len;
592:
1.226 dtucker 593: if (ci == NULL)
1.153 dtucker 594: debug3("checking syntax for 'Match %s'", cp);
595: else
1.226 dtucker 596: debug3("checking match for '%s' user %s host %s addr %s "
597: "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
598: ci->host ? ci->host : "(null)",
599: ci->address ? ci->address : "(null)",
600: ci->laddress ? ci->laddress : "(null)", ci->lport);
1.153 dtucker 601:
602: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
603: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
604: error("Missing Match criteria for %s", attrib);
605: return -1;
606: }
607: len = strlen(arg);
608: if (strcasecmp(attrib, "user") == 0) {
1.226 dtucker 609: if (ci == NULL || ci->user == NULL) {
1.153 dtucker 610: result = 0;
611: continue;
612: }
1.226 dtucker 613: if (match_pattern_list(ci->user, arg, len, 0) != 1)
1.153 dtucker 614: result = 0;
615: else
616: debug("user %.100s matched 'User %.100s' at "
1.226 dtucker 617: "line %d", ci->user, arg, line);
1.165 dtucker 618: } else if (strcasecmp(attrib, "group") == 0) {
1.226 dtucker 619: if (ci == NULL || ci->user == NULL) {
620: result = 0;
621: continue;
622: }
623: switch (match_cfg_line_group(arg, line, ci->user)) {
1.165 dtucker 624: case -1:
625: return -1;
626: case 0:
627: result = 0;
628: }
1.153 dtucker 629: } else if (strcasecmp(attrib, "host") == 0) {
1.226 dtucker 630: if (ci == NULL || ci->host == NULL) {
1.153 dtucker 631: result = 0;
632: continue;
633: }
1.226 dtucker 634: if (match_hostname(ci->host, arg, len) != 1)
1.153 dtucker 635: result = 0;
636: else
637: debug("connection from %.100s matched 'Host "
1.226 dtucker 638: "%.100s' at line %d", ci->host, arg, line);
1.153 dtucker 639: } else if (strcasecmp(attrib, "address") == 0) {
1.226 dtucker 640: if (ci == NULL || ci->address == NULL) {
641: result = 0;
642: continue;
643: }
644: switch (addr_match_list(ci->address, arg)) {
1.181 djm 645: case 1:
646: debug("connection from %.100s matched 'Address "
1.226 dtucker 647: "%.100s' at line %d", ci->address, arg, line);
1.181 djm 648: break;
649: case 0:
1.183 djm 650: case -1:
1.153 dtucker 651: result = 0;
1.181 djm 652: break;
1.183 djm 653: case -2:
1.181 djm 654: return -1;
1.153 dtucker 655: }
1.226 dtucker 656: } else if (strcasecmp(attrib, "localaddress") == 0){
657: if (ci == NULL || ci->laddress == NULL) {
658: result = 0;
659: continue;
660: }
661: switch (addr_match_list(ci->laddress, arg)) {
662: case 1:
663: debug("connection from %.100s matched "
664: "'LocalAddress %.100s' at line %d",
665: ci->laddress, arg, line);
666: break;
667: case 0:
668: case -1:
669: result = 0;
670: break;
671: case -2:
672: return -1;
673: }
674: } else if (strcasecmp(attrib, "localport") == 0) {
675: if ((port = a2port(arg)) == -1) {
676: error("Invalid LocalPort '%s' on Match line",
677: arg);
678: return -1;
679: }
680: if (ci == NULL || ci->lport == 0) {
681: result = 0;
682: continue;
683: }
684: /* TODO support port lists */
685: if (port == ci->lport)
686: debug("connection from %.100s matched "
687: "'LocalPort %d' at line %d",
688: ci->laddress, port, line);
689: else
690: result = 0;
1.153 dtucker 691: } else {
692: error("Unsupported Match attribute %s", attrib);
693: return -1;
694: }
695: }
1.226 dtucker 696: if (ci != NULL)
1.153 dtucker 697: debug3("match %sfound", result ? "" : "not ");
698: *condition = cp;
699: return result;
700: }
701:
1.158 dtucker 702: #define WHITESPACE " \t\r\n"
703:
1.220 djm 704: /* Multistate option parsing */
705: struct multistate {
706: char *key;
707: int value;
708: };
709: static const struct multistate multistate_addressfamily[] = {
710: { "inet", AF_INET },
711: { "inet6", AF_INET6 },
712: { "any", AF_UNSPEC },
713: { NULL, -1 }
714: };
715: static const struct multistate multistate_permitrootlogin[] = {
716: { "without-password", PERMIT_NO_PASSWD },
717: { "forced-commands-only", PERMIT_FORCED_ONLY },
718: { "yes", PERMIT_YES },
719: { "no", PERMIT_NO },
720: { NULL, -1 }
721: };
722: static const struct multistate multistate_compression[] = {
723: { "delayed", COMP_DELAYED },
724: { "yes", COMP_ZLIB },
725: { "no", COMP_NONE },
726: { NULL, -1 }
727: };
728: static const struct multistate multistate_gatewayports[] = {
729: { "clientspecified", 2 },
730: { "yes", 1 },
731: { "no", 0 },
732: { NULL, -1 }
733: };
1.222 djm 734: static const struct multistate multistate_privsep[] = {
1.228 djm 735: { "yes", PRIVSEP_NOSANDBOX },
736: { "sandbox", PRIVSEP_ON },
737: { "nosandbox", PRIVSEP_NOSANDBOX },
1.222 djm 738: { "no", PRIVSEP_OFF },
739: { NULL, -1 }
740: };
1.220 djm 741:
1.94 markus 742: int
743: process_server_config_line(ServerOptions *options, char *line,
1.226 dtucker 744: const char *filename, int linenum, int *activep,
745: struct connection_info *connectinfo)
1.1 deraadt 746: {
1.74 stevesk 747: char *cp, **charptr, *arg, *p;
1.213 djm 748: int cmdline = 0, *intptr, value, value2, n;
1.174 dtucker 749: SyslogFacility *log_facility_ptr;
750: LogLevel *log_level_ptr;
1.25 markus 751: ServerOpCodes opcode;
1.194 djm 752: int port;
1.153 dtucker 753: u_int i, flags = 0;
1.151 djm 754: size_t len;
1.220 djm 755: const struct multistate *multistate_ptr;
1.25 markus 756:
1.94 markus 757: cp = line;
1.148 dtucker 758: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 759: return 0;
1.94 markus 760: /* Ignore leading whitespace */
761: if (*arg == '\0')
762: arg = strdelim(&cp);
763: if (!arg || !*arg || *arg == '#')
764: return 0;
765: intptr = NULL;
766: charptr = NULL;
1.153 dtucker 767: opcode = parse_token(arg, filename, linenum, &flags);
768:
769: if (activep == NULL) { /* We are processing a command line directive */
770: cmdline = 1;
771: activep = &cmdline;
772: }
773: if (*activep && opcode != sMatch)
774: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
775: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
1.226 dtucker 776: if (connectinfo == NULL) {
1.153 dtucker 777: fatal("%s line %d: Directive '%s' is not allowed "
778: "within a Match block", filename, linenum, arg);
779: } else { /* this is a directive we have already processed */
780: while (arg)
781: arg = strdelim(&cp);
782: return 0;
783: }
784: }
785:
1.94 markus 786: switch (opcode) {
787: case sBadOption:
788: return -1;
789: case sPort:
790: /* ignore ports from configfile if cmdline specifies ports */
791: if (options->ports_from_cmdline)
792: return 0;
793: if (options->listen_addrs != NULL)
794: fatal("%s line %d: ports must be specified before "
1.98 stevesk 795: "ListenAddress.", filename, linenum);
1.94 markus 796: if (options->num_ports >= MAX_PORTS)
797: fatal("%s line %d: too many ports.",
798: filename, linenum);
1.48 provos 799: arg = strdelim(&cp);
1.94 markus 800: if (!arg || *arg == '\0')
801: fatal("%s line %d: missing port number.",
802: filename, linenum);
803: options->ports[options->num_ports++] = a2port(arg);
1.194 djm 804: if (options->ports[options->num_ports-1] <= 0)
1.94 markus 805: fatal("%s line %d: Badly formatted port number.",
806: filename, linenum);
807: break;
1.29 markus 808:
1.94 markus 809: case sServerKeyBits:
810: intptr = &options->server_key_bits;
1.180 djm 811: parse_int:
1.94 markus 812: arg = strdelim(&cp);
813: if (!arg || *arg == '\0')
814: fatal("%s line %d: missing integer value.",
815: filename, linenum);
816: value = atoi(arg);
1.153 dtucker 817: if (*activep && *intptr == -1)
1.94 markus 818: *intptr = value;
819: break;
1.25 markus 820:
1.94 markus 821: case sLoginGraceTime:
822: intptr = &options->login_grace_time;
1.180 djm 823: parse_time:
1.94 markus 824: arg = strdelim(&cp);
825: if (!arg || *arg == '\0')
826: fatal("%s line %d: missing time value.",
827: filename, linenum);
828: if ((value = convtime(arg)) == -1)
829: fatal("%s line %d: invalid time value.",
830: filename, linenum);
831: if (*intptr == -1)
832: *intptr = value;
833: break;
834:
835: case sKeyRegenerationTime:
836: intptr = &options->key_regeneration_time;
837: goto parse_time;
838:
839: case sListenAddress:
840: arg = strdelim(&cp);
1.139 djm 841: if (arg == NULL || *arg == '\0')
842: fatal("%s line %d: missing address",
1.94 markus 843: filename, linenum);
1.144 dtucker 844: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
845: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
846: && strchr(p+1, ':') != NULL) {
847: add_listen_addr(options, arg, 0);
848: break;
849: }
1.139 djm 850: p = hpdelim(&arg);
851: if (p == NULL)
852: fatal("%s line %d: bad address:port usage",
853: filename, linenum);
854: p = cleanhostname(p);
855: if (arg == NULL)
856: port = 0;
1.194 djm 857: else if ((port = a2port(arg)) <= 0)
1.139 djm 858: fatal("%s line %d: bad port number", filename, linenum);
859:
860: add_listen_addr(options, p, port);
1.25 markus 861:
1.138 djm 862: break;
863:
864: case sAddressFamily:
1.220 djm 865: intptr = &options->address_family;
866: multistate_ptr = multistate_addressfamily;
867: if (options->listen_addrs != NULL)
868: fatal("%s line %d: address family must be specified "
869: "before ListenAddress.", filename, linenum);
870: parse_multistate:
1.138 djm 871: arg = strdelim(&cp);
1.141 markus 872: if (!arg || *arg == '\0')
1.220 djm 873: fatal("%s line %d: missing argument.",
1.141 markus 874: filename, linenum);
1.220 djm 875: value = -1;
876: for (i = 0; multistate_ptr[i].key != NULL; i++) {
877: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
878: value = multistate_ptr[i].value;
879: break;
880: }
881: }
882: if (value == -1)
883: fatal("%s line %d: unsupported option \"%s\".",
1.138 djm 884: filename, linenum, arg);
1.220 djm 885: if (*activep && *intptr == -1)
1.138 djm 886: *intptr = value;
1.94 markus 887: break;
888:
889: case sHostKeyFile:
890: intptr = &options->num_host_key_files;
891: if (*intptr >= MAX_HOSTKEYS)
892: fatal("%s line %d: too many host keys specified (max %d).",
893: filename, linenum, MAX_HOSTKEYS);
894: charptr = &options->host_key_files[*intptr];
1.180 djm 895: parse_filename:
1.94 markus 896: arg = strdelim(&cp);
897: if (!arg || *arg == '\0')
898: fatal("%s line %d: missing file name.",
899: filename, linenum);
1.153 dtucker 900: if (*activep && *charptr == NULL) {
1.202 djm 901: *charptr = derelativise_path(arg);
1.94 markus 902: /* increase optional counter */
903: if (intptr != NULL)
904: *intptr = *intptr + 1;
905: }
906: break;
1.76 stevesk 907:
1.203 djm 908: case sHostCertificate:
909: intptr = &options->num_host_cert_files;
910: if (*intptr >= MAX_HOSTKEYS)
911: fatal("%s line %d: too many host certificates "
912: "specified (max %d).", filename, linenum,
913: MAX_HOSTCERTS);
914: charptr = &options->host_cert_files[*intptr];
915: goto parse_filename;
916: break;
917:
1.94 markus 918: case sPidFile:
919: charptr = &options->pid_file;
920: goto parse_filename;
1.25 markus 921:
1.94 markus 922: case sPermitRootLogin:
923: intptr = &options->permit_root_login;
1.220 djm 924: multistate_ptr = multistate_permitrootlogin;
925: goto parse_multistate;
1.36 markus 926:
1.94 markus 927: case sIgnoreRhosts:
928: intptr = &options->ignore_rhosts;
1.180 djm 929: parse_flag:
1.94 markus 930: arg = strdelim(&cp);
931: if (!arg || *arg == '\0')
932: fatal("%s line %d: missing yes/no argument.",
933: filename, linenum);
934: value = 0; /* silence compiler */
935: if (strcmp(arg, "yes") == 0)
936: value = 1;
937: else if (strcmp(arg, "no") == 0)
938: value = 0;
939: else
940: fatal("%s line %d: Bad yes/no argument: %s",
941: filename, linenum, arg);
1.153 dtucker 942: if (*activep && *intptr == -1)
1.94 markus 943: *intptr = value;
944: break;
945:
946: case sIgnoreUserKnownHosts:
947: intptr = &options->ignore_user_known_hosts;
948: goto parse_flag;
949:
950: case sRhostsRSAAuthentication:
951: intptr = &options->rhosts_rsa_authentication;
952: goto parse_flag;
953:
954: case sHostbasedAuthentication:
955: intptr = &options->hostbased_authentication;
956: goto parse_flag;
957:
958: case sHostbasedUsesNameFromPacketOnly:
959: intptr = &options->hostbased_uses_name_from_packet_only;
960: goto parse_flag;
961:
962: case sRSAAuthentication:
963: intptr = &options->rsa_authentication;
964: goto parse_flag;
965:
966: case sPubkeyAuthentication:
967: intptr = &options->pubkey_authentication;
968: goto parse_flag;
1.119 jakob 969:
1.94 markus 970: case sKerberosAuthentication:
971: intptr = &options->kerberos_authentication;
972: goto parse_flag;
973:
974: case sKerberosOrLocalPasswd:
975: intptr = &options->kerberos_or_local_passwd;
976: goto parse_flag;
977:
978: case sKerberosTicketCleanup:
979: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 980: goto parse_flag;
981:
982: case sKerberosGetAFSToken:
983: intptr = &options->kerberos_get_afs_token;
1.125 markus 984: goto parse_flag;
985:
986: case sGssAuthentication:
987: intptr = &options->gss_authentication;
988: goto parse_flag;
989:
990: case sGssCleanupCreds:
991: intptr = &options->gss_cleanup_creds;
1.94 markus 992: goto parse_flag;
993:
994: case sPasswordAuthentication:
995: intptr = &options->password_authentication;
996: goto parse_flag;
997:
1.190 djm 998: case sZeroKnowledgePasswordAuthentication:
999: intptr = &options->zero_knowledge_password_authentication;
1000: goto parse_flag;
1001:
1.94 markus 1002: case sKbdInteractiveAuthentication:
1003: intptr = &options->kbd_interactive_authentication;
1004: goto parse_flag;
1005:
1006: case sChallengeResponseAuthentication:
1007: intptr = &options->challenge_response_authentication;
1008: goto parse_flag;
1009:
1010: case sPrintMotd:
1011: intptr = &options->print_motd;
1012: goto parse_flag;
1013:
1014: case sPrintLastLog:
1015: intptr = &options->print_lastlog;
1016: goto parse_flag;
1017:
1018: case sX11Forwarding:
1019: intptr = &options->x11_forwarding;
1020: goto parse_flag;
1021:
1022: case sX11DisplayOffset:
1023: intptr = &options->x11_display_offset;
1024: goto parse_int;
1.99 stevesk 1025:
1026: case sX11UseLocalhost:
1027: intptr = &options->x11_use_localhost;
1028: goto parse_flag;
1.94 markus 1029:
1030: case sXAuthLocation:
1031: charptr = &options->xauth_location;
1032: goto parse_filename;
1033:
1034: case sStrictModes:
1035: intptr = &options->strict_modes;
1036: goto parse_flag;
1037:
1.129 markus 1038: case sTCPKeepAlive:
1039: intptr = &options->tcp_keep_alive;
1.94 markus 1040: goto parse_flag;
1041:
1042: case sEmptyPasswd:
1043: intptr = &options->permit_empty_passwd;
1.113 markus 1044: goto parse_flag;
1045:
1046: case sPermitUserEnvironment:
1047: intptr = &options->permit_user_env;
1.94 markus 1048: goto parse_flag;
1049:
1050: case sUseLogin:
1051: intptr = &options->use_login;
1.111 markus 1052: goto parse_flag;
1053:
1054: case sCompression:
1055: intptr = &options->compression;
1.220 djm 1056: multistate_ptr = multistate_compression;
1057: goto parse_multistate;
1.94 markus 1058:
1059: case sGatewayPorts:
1060: intptr = &options->gateway_ports;
1.220 djm 1061: multistate_ptr = multistate_gatewayports;
1062: goto parse_multistate;
1.25 markus 1063:
1.122 markus 1064: case sUseDNS:
1065: intptr = &options->use_dns;
1.94 markus 1066: goto parse_flag;
1.53 markus 1067:
1.94 markus 1068: case sLogFacility:
1.174 dtucker 1069: log_facility_ptr = &options->log_facility;
1.94 markus 1070: arg = strdelim(&cp);
1071: value = log_facility_number(arg);
1.101 markus 1072: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 1073: fatal("%.200s line %d: unsupported log facility '%s'",
1074: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1075: if (*log_facility_ptr == -1)
1076: *log_facility_ptr = (SyslogFacility) value;
1.94 markus 1077: break;
1.25 markus 1078:
1.94 markus 1079: case sLogLevel:
1.174 dtucker 1080: log_level_ptr = &options->log_level;
1.94 markus 1081: arg = strdelim(&cp);
1082: value = log_level_number(arg);
1.101 markus 1083: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 1084: fatal("%.200s line %d: unsupported log level '%s'",
1085: filename, linenum, arg ? arg : "<NONE>");
1.174 dtucker 1086: if (*log_level_ptr == -1)
1087: *log_level_ptr = (LogLevel) value;
1.94 markus 1088: break;
1089:
1090: case sAllowTcpForwarding:
1091: intptr = &options->allow_tcp_forwarding;
1092: goto parse_flag;
1.102 provos 1093:
1.178 pyr 1094: case sAllowAgentForwarding:
1095: intptr = &options->allow_agent_forwarding;
1096: goto parse_flag;
1097:
1.102 provos 1098: case sUsePrivilegeSeparation:
1099: intptr = &use_privsep;
1.222 djm 1100: multistate_ptr = multistate_privsep;
1101: goto parse_multistate;
1.94 markus 1102:
1103: case sAllowUsers:
1104: while ((arg = strdelim(&cp)) && *arg != '\0') {
1105: if (options->num_allow_users >= MAX_ALLOW_USERS)
1106: fatal("%s line %d: too many allow users.",
1107: filename, linenum);
1.227 markus 1108: if (!*activep)
1109: continue;
1.112 deraadt 1110: options->allow_users[options->num_allow_users++] =
1111: xstrdup(arg);
1.94 markus 1112: }
1113: break;
1.25 markus 1114:
1.94 markus 1115: case sDenyUsers:
1116: while ((arg = strdelim(&cp)) && *arg != '\0') {
1117: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 stevesk 1118: fatal("%s line %d: too many deny users.",
1.94 markus 1119: filename, linenum);
1.227 markus 1120: if (!*activep)
1121: continue;
1.112 deraadt 1122: options->deny_users[options->num_deny_users++] =
1123: xstrdup(arg);
1.94 markus 1124: }
1125: break;
1.25 markus 1126:
1.94 markus 1127: case sAllowGroups:
1128: while ((arg = strdelim(&cp)) && *arg != '\0') {
1129: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1130: fatal("%s line %d: too many allow groups.",
1131: filename, linenum);
1.227 markus 1132: if (!*activep)
1133: continue;
1.112 deraadt 1134: options->allow_groups[options->num_allow_groups++] =
1135: xstrdup(arg);
1.94 markus 1136: }
1137: break;
1.33 markus 1138:
1.94 markus 1139: case sDenyGroups:
1140: while ((arg = strdelim(&cp)) && *arg != '\0') {
1141: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1142: fatal("%s line %d: too many deny groups.",
1143: filename, linenum);
1.227 markus 1144: if (!*activep)
1145: continue;
1146: options->deny_groups[options->num_deny_groups++] =
1147: xstrdup(arg);
1.94 markus 1148: }
1149: break;
1.66 markus 1150:
1.94 markus 1151: case sCiphers:
1152: arg = strdelim(&cp);
1153: if (!arg || *arg == '\0')
1154: fatal("%s line %d: Missing argument.", filename, linenum);
1155: if (!ciphers_valid(arg))
1156: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1157: filename, linenum, arg ? arg : "<NONE>");
1158: if (options->ciphers == NULL)
1159: options->ciphers = xstrdup(arg);
1160: break;
1.33 markus 1161:
1.94 markus 1162: case sMacs:
1163: arg = strdelim(&cp);
1164: if (!arg || *arg == '\0')
1165: fatal("%s line %d: Missing argument.", filename, linenum);
1166: if (!mac_valid(arg))
1167: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
1168: filename, linenum, arg ? arg : "<NONE>");
1169: if (options->macs == NULL)
1170: options->macs = xstrdup(arg);
1.211 djm 1171: break;
1172:
1173: case sKexAlgorithms:
1174: arg = strdelim(&cp);
1175: if (!arg || *arg == '\0')
1176: fatal("%s line %d: Missing argument.",
1177: filename, linenum);
1178: if (!kex_names_valid(arg))
1179: fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
1180: filename, linenum, arg ? arg : "<NONE>");
1181: if (options->kex_algorithms == NULL)
1182: options->kex_algorithms = xstrdup(arg);
1.94 markus 1183: break;
1.43 jakob 1184:
1.94 markus 1185: case sProtocol:
1186: intptr = &options->protocol;
1187: arg = strdelim(&cp);
1188: if (!arg || *arg == '\0')
1189: fatal("%s line %d: Missing argument.", filename, linenum);
1190: value = proto_spec(arg);
1191: if (value == SSH_PROTO_UNKNOWN)
1192: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 1193: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 1194: if (*intptr == SSH_PROTO_UNKNOWN)
1195: *intptr = value;
1196: break;
1197:
1198: case sSubsystem:
1199: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
1200: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 1201: filename, linenum);
1.94 markus 1202: }
1203: arg = strdelim(&cp);
1204: if (!arg || *arg == '\0')
1205: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 1206: filename, linenum);
1.153 dtucker 1207: if (!*activep) {
1208: arg = strdelim(&cp);
1209: break;
1210: }
1.94 markus 1211: for (i = 0; i < options->num_subsystems; i++)
1212: if (strcmp(arg, options->subsystem_name[i]) == 0)
1213: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1214: filename, linenum, arg);
1.94 markus 1215: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1216: arg = strdelim(&cp);
1217: if (!arg || *arg == '\0')
1218: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1219: filename, linenum);
1.94 markus 1220: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1221:
1222: /* Collect arguments (separate to executable) */
1223: p = xstrdup(arg);
1224: len = strlen(p) + 1;
1225: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1226: len += 1 + strlen(arg);
1227: p = xrealloc(p, 1, len);
1228: strlcat(p, " ", len);
1229: strlcat(p, arg, len);
1230: }
1231: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1232: options->num_subsystems++;
1233: break;
1.46 markus 1234:
1.94 markus 1235: case sMaxStartups:
1236: arg = strdelim(&cp);
1237: if (!arg || *arg == '\0')
1238: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1239: filename, linenum);
1.94 markus 1240: if ((n = sscanf(arg, "%d:%d:%d",
1241: &options->max_startups_begin,
1242: &options->max_startups_rate,
1243: &options->max_startups)) == 3) {
1244: if (options->max_startups_begin >
1245: options->max_startups ||
1246: options->max_startups_rate > 100 ||
1247: options->max_startups_rate < 1)
1.50 markus 1248: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1249: filename, linenum);
1.94 markus 1250: } else if (n != 1)
1251: fatal("%s line %d: Illegal MaxStartups spec.",
1252: filename, linenum);
1253: else
1254: options->max_startups = options->max_startups_begin;
1255: break;
1.133 dtucker 1256:
1257: case sMaxAuthTries:
1258: intptr = &options->max_authtries;
1259: goto parse_int;
1.94 markus 1260:
1.180 djm 1261: case sMaxSessions:
1262: intptr = &options->max_sessions;
1263: goto parse_int;
1264:
1.94 markus 1265: case sBanner:
1266: charptr = &options->banner;
1267: goto parse_filename;
1.176 djm 1268:
1.94 markus 1269: /*
1270: * These options can contain %X options expanded at
1271: * connect time, so that you can specify paths like:
1272: *
1273: * AuthorizedKeysFile /etc/ssh_keys/%u
1274: */
1275: case sAuthorizedKeysFile:
1.219 djm 1276: if (*activep && options->num_authkeys_files == 0) {
1277: while ((arg = strdelim(&cp)) && *arg != '\0') {
1278: if (options->num_authkeys_files >=
1279: MAX_AUTHKEYS_FILES)
1280: fatal("%s line %d: "
1281: "too many authorized keys files.",
1282: filename, linenum);
1283: options->authorized_keys_files[
1284: options->num_authkeys_files++] =
1285: tilde_expand_filename(arg, getuid());
1286: }
1287: }
1288: return 0;
1289:
1.208 djm 1290: case sAuthorizedPrincipalsFile:
1291: charptr = &options->authorized_principals_file;
1.205 djm 1292: arg = strdelim(&cp);
1293: if (!arg || *arg == '\0')
1294: fatal("%s line %d: missing file name.",
1295: filename, linenum);
1296: if (*activep && *charptr == NULL) {
1.206 markus 1297: *charptr = tilde_expand_filename(arg, getuid());
1.205 djm 1298: /* increase optional counter */
1299: if (intptr != NULL)
1300: *intptr = *intptr + 1;
1301: }
1302: break;
1.94 markus 1303:
1304: case sClientAliveInterval:
1305: intptr = &options->client_alive_interval;
1306: goto parse_time;
1307:
1308: case sClientAliveCountMax:
1309: intptr = &options->client_alive_count_max;
1310: goto parse_int;
1.131 djm 1311:
1312: case sAcceptEnv:
1313: while ((arg = strdelim(&cp)) && *arg != '\0') {
1314: if (strchr(arg, '=') != NULL)
1315: fatal("%s line %d: Invalid environment name.",
1316: filename, linenum);
1317: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1318: fatal("%s line %d: too many allow env.",
1319: filename, linenum);
1.153 dtucker 1320: if (!*activep)
1.227 markus 1321: continue;
1.131 djm 1322: options->accept_env[options->num_accept_env++] =
1323: xstrdup(arg);
1324: }
1325: break;
1.145 reyk 1326:
1327: case sPermitTunnel:
1328: intptr = &options->permit_tun;
1.146 reyk 1329: arg = strdelim(&cp);
1330: if (!arg || *arg == '\0')
1331: fatal("%s line %d: Missing yes/point-to-point/"
1332: "ethernet/no argument.", filename, linenum);
1.182 dtucker 1333: value = -1;
1334: for (i = 0; tunmode_desc[i].val != -1; i++)
1335: if (strcmp(tunmode_desc[i].text, arg) == 0) {
1336: value = tunmode_desc[i].val;
1337: break;
1338: }
1339: if (value == -1)
1.146 reyk 1340: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1341: "no argument: %s", filename, linenum, arg);
1342: if (*intptr == -1)
1343: *intptr = value;
1344: break;
1.94 markus 1345:
1.153 dtucker 1346: case sMatch:
1347: if (cmdline)
1348: fatal("Match directive not supported as a command-line "
1349: "option");
1.226 dtucker 1350: value = match_cfg_line(&cp, linenum, connectinfo);
1.153 dtucker 1351: if (value < 0)
1352: fatal("%s line %d: Bad Match condition", filename,
1353: linenum);
1354: *activep = value;
1.156 dtucker 1355: break;
1356:
1357: case sPermitOpen:
1358: arg = strdelim(&cp);
1359: if (!arg || *arg == '\0')
1360: fatal("%s line %d: missing PermitOpen specification",
1361: filename, linenum);
1.167 dtucker 1362: n = options->num_permitted_opens; /* modified later */
1.156 dtucker 1363: if (strcmp(arg, "any") == 0) {
1.167 dtucker 1364: if (*activep && n == -1) {
1.156 dtucker 1365: channel_clear_adm_permitted_opens();
1.159 dtucker 1366: options->num_permitted_opens = 0;
1.224 dtucker 1367: }
1368: break;
1369: }
1370: if (strcmp(arg, "none") == 0) {
1371: if (*activep && n == -1) {
1372: channel_clear_adm_permitted_opens();
1373: options->num_permitted_opens = 1;
1374: channel_disable_adm_local_opens();
1.159 dtucker 1375: }
1.156 dtucker 1376: break;
1377: }
1.166 dtucker 1378: if (*activep && n == -1)
1379: channel_clear_adm_permitted_opens();
1.159 dtucker 1380: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1381: p = hpdelim(&arg);
1382: if (p == NULL)
1383: fatal("%s line %d: missing host in PermitOpen",
1384: filename, linenum);
1385: p = cleanhostname(p);
1.223 dtucker 1386: if (arg == NULL || ((port = permitopen_port(arg)) < 0))
1.159 dtucker 1387: fatal("%s line %d: bad port number in "
1388: "PermitOpen", filename, linenum);
1.166 dtucker 1389: if (*activep && n == -1)
1.159 dtucker 1390: options->num_permitted_opens =
1391: channel_add_adm_permitted_opens(p, port);
1392: }
1.153 dtucker 1393: break;
1394:
1.158 dtucker 1395: case sForceCommand:
1396: if (cp == NULL)
1397: fatal("%.200s line %d: Missing argument.", filename,
1398: linenum);
1399: len = strspn(cp, WHITESPACE);
1400: if (*activep && options->adm_forced_command == NULL)
1401: options->adm_forced_command = xstrdup(cp + len);
1402: return 0;
1403:
1.176 djm 1404: case sChrootDirectory:
1405: charptr = &options->chroot_directory;
1.177 djm 1406:
1407: arg = strdelim(&cp);
1408: if (!arg || *arg == '\0')
1409: fatal("%s line %d: missing file name.",
1410: filename, linenum);
1411: if (*activep && *charptr == NULL)
1412: *charptr = xstrdup(arg);
1413: break;
1.176 djm 1414:
1.204 djm 1415: case sTrustedUserCAKeys:
1416: charptr = &options->trusted_user_ca_keys;
1417: goto parse_filename;
1418:
1419: case sRevokedKeys:
1420: charptr = &options->revoked_keys_file;
1421: goto parse_filename;
1422:
1.213 djm 1423: case sIPQoS:
1424: arg = strdelim(&cp);
1425: if ((value = parse_ipqos(arg)) == -1)
1426: fatal("%s line %d: Bad IPQoS value: %s",
1427: filename, linenum, arg);
1428: arg = strdelim(&cp);
1429: if (arg == NULL)
1430: value2 = value;
1431: else if ((value2 = parse_ipqos(arg)) == -1)
1432: fatal("%s line %d: Bad IPQoS value: %s",
1433: filename, linenum, arg);
1434: if (*activep) {
1435: options->ip_qos_interactive = value;
1436: options->ip_qos_bulk = value2;
1437: }
1438: break;
1439:
1.225 djm 1440: case sVersionAddendum:
1441: if (cp == NULL)
1442: fatal("%.200s line %d: Missing argument.", filename,
1443: linenum);
1444: len = strspn(cp, WHITESPACE);
1445: if (*activep && options->version_addendum == NULL) {
1446: if (strcasecmp(cp + len, "none") == 0)
1447: options->version_addendum = xstrdup("");
1448: else if (strchr(cp + len, '\r') != NULL)
1449: fatal("%.200s line %d: Invalid argument",
1450: filename, linenum);
1451: else
1452: options->version_addendum = xstrdup(cp + len);
1453: }
1454: return 0;
1455:
1.94 markus 1456: case sDeprecated:
1.117 itojun 1457: logit("%s line %d: Deprecated option %s",
1.121 jakob 1458: filename, linenum, arg);
1459: while (arg)
1460: arg = strdelim(&cp);
1461: break;
1462:
1463: case sUnsupported:
1464: logit("%s line %d: Unsupported option %s",
1.94 markus 1465: filename, linenum, arg);
1466: while (arg)
1467: arg = strdelim(&cp);
1468: break;
1469:
1470: default:
1471: fatal("%s line %d: Missing handler for opcode %s (%d)",
1472: filename, linenum, arg, opcode);
1473: }
1474: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1475: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1476: filename, linenum, arg);
1477: return 0;
1478: }
1479:
1480: /* Reads the server configuration file. */
1.25 markus 1481:
1.94 markus 1482: void
1.134 djm 1483: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1484: {
1.229 dtucker 1485: char line[4096], *cp;
1.94 markus 1486: FILE *f;
1.229 dtucker 1487: int lineno = 0;
1.81 stevesk 1488:
1.134 djm 1489: debug2("%s: filename %s", __func__, filename);
1490: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1491: perror(filename);
1492: exit(1);
1493: }
1.134 djm 1494: buffer_clear(conf);
1495: while (fgets(line, sizeof(line), f)) {
1.229 dtucker 1496: lineno++;
1497: if (strlen(line) == sizeof(line) - 1)
1498: fatal("%s line %d too long", filename, lineno);
1.134 djm 1499: /*
1500: * Trim out comments and strip whitespace
1.135 deraadt 1501: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1502: * line numbers later for error messages
1503: */
1504: if ((cp = strchr(line, '#')) != NULL)
1505: memcpy(cp, "\n", 2);
1506: cp = line + strspn(line, " \t\r");
1507:
1508: buffer_append(conf, cp, strlen(cp));
1509: }
1510: buffer_append(conf, "\0", 1);
1511: fclose(f);
1512: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1513: }
1514:
1515: void
1.226 dtucker 1516: parse_server_match_config(ServerOptions *options,
1517: struct connection_info *connectinfo)
1.153 dtucker 1518: {
1519: ServerOptions mo;
1520:
1521: initialize_server_options(&mo);
1.226 dtucker 1522: parse_server_config(&mo, "reprocess config", &cfg, connectinfo);
1.168 dtucker 1523: copy_set_server_options(options, &mo, 0);
1.153 dtucker 1524: }
1525:
1.226 dtucker 1526: int parse_server_match_testspec(struct connection_info *ci, char *spec)
1527: {
1528: char *p;
1529:
1530: while ((p = strsep(&spec, ",")) && *p != '\0') {
1531: if (strncmp(p, "addr=", 5) == 0) {
1532: ci->address = xstrdup(p + 5);
1533: } else if (strncmp(p, "host=", 5) == 0) {
1534: ci->host = xstrdup(p + 5);
1535: } else if (strncmp(p, "user=", 5) == 0) {
1536: ci->user = xstrdup(p + 5);
1537: } else if (strncmp(p, "laddr=", 6) == 0) {
1538: ci->laddress = xstrdup(p + 6);
1539: } else if (strncmp(p, "lport=", 6) == 0) {
1540: ci->lport = a2port(p + 6);
1541: if (ci->lport == -1) {
1542: fprintf(stderr, "Invalid port '%s' in test mode"
1543: " specification %s\n", p+6, p);
1544: return -1;
1545: }
1546: } else {
1547: fprintf(stderr, "Invalid test mode specification %s\n",
1548: p);
1549: return -1;
1550: }
1551: }
1552: return 0;
1553: }
1554:
1555: /*
1556: * returns 1 for a complete spec, 0 for partial spec and -1 for an
1557: * empty spec.
1558: */
1559: int server_match_spec_complete(struct connection_info *ci)
1560: {
1561: if (ci->user && ci->host && ci->address)
1562: return 1; /* complete */
1563: if (!ci->user && !ci->host && !ci->address)
1564: return -1; /* empty */
1565: return 0; /* partial */
1566: }
1567:
1.168 dtucker 1568: /* Helper macros */
1569: #define M_CP_INTOPT(n) do {\
1570: if (src->n != -1) \
1571: dst->n = src->n; \
1572: } while (0)
1573: #define M_CP_STROPT(n) do {\
1574: if (src->n != NULL) { \
1575: if (dst->n != NULL) \
1576: xfree(dst->n); \
1577: dst->n = src->n; \
1578: } \
1579: } while(0)
1.219 djm 1580: #define M_CP_STRARRAYOPT(n, num_n) do {\
1581: if (src->num_n != 0) { \
1582: for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \
1583: dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \
1584: } \
1585: } while(0)
1.168 dtucker 1586:
1587: /*
1588: * Copy any supported values that are set.
1589: *
1.195 jj 1590: * If the preauth flag is set, we do not bother copying the string or
1.168 dtucker 1591: * array values that are not used pre-authentication, because any that we
1592: * do use must be explictly sent in mm_getpwnamallow().
1593: */
1.153 dtucker 1594: void
1.168 dtucker 1595: copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
1.153 dtucker 1596: {
1.168 dtucker 1597: M_CP_INTOPT(password_authentication);
1598: M_CP_INTOPT(gss_authentication);
1599: M_CP_INTOPT(rsa_authentication);
1600: M_CP_INTOPT(pubkey_authentication);
1601: M_CP_INTOPT(kerberos_authentication);
1602: M_CP_INTOPT(hostbased_authentication);
1.209 djm 1603: M_CP_INTOPT(hostbased_uses_name_from_packet_only);
1.168 dtucker 1604: M_CP_INTOPT(kbd_interactive_authentication);
1.190 djm 1605: M_CP_INTOPT(zero_knowledge_password_authentication);
1.175 dtucker 1606: M_CP_INTOPT(permit_root_login);
1.188 djm 1607: M_CP_INTOPT(permit_empty_passwd);
1.168 dtucker 1608:
1609: M_CP_INTOPT(allow_tcp_forwarding);
1.178 pyr 1610: M_CP_INTOPT(allow_agent_forwarding);
1.209 djm 1611: M_CP_INTOPT(permit_tun);
1.168 dtucker 1612: M_CP_INTOPT(gateway_ports);
1613: M_CP_INTOPT(x11_display_offset);
1614: M_CP_INTOPT(x11_forwarding);
1615: M_CP_INTOPT(x11_use_localhost);
1.180 djm 1616: M_CP_INTOPT(max_sessions);
1.184 dtucker 1617: M_CP_INTOPT(max_authtries);
1.213 djm 1618: M_CP_INTOPT(ip_qos_interactive);
1619: M_CP_INTOPT(ip_qos_bulk);
1.168 dtucker 1620:
1.218 djm 1621: /* See comment in servconf.h */
1622: COPY_MATCH_STRING_OPTS();
1.216 djm 1623:
1.217 dtucker 1624: /*
1625: * The only things that should be below this point are string options
1626: * which are only used after authentication.
1627: */
1.168 dtucker 1628: if (preauth)
1629: return;
1.219 djm 1630:
1.168 dtucker 1631: M_CP_STROPT(adm_forced_command);
1.176 djm 1632: M_CP_STROPT(chroot_directory);
1.153 dtucker 1633: }
1.168 dtucker 1634:
1635: #undef M_CP_INTOPT
1636: #undef M_CP_STROPT
1.219 djm 1637: #undef M_CP_STRARRAYOPT
1.153 dtucker 1638:
1639: void
1640: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1.226 dtucker 1641: struct connection_info *connectinfo)
1.134 djm 1642: {
1.153 dtucker 1643: int active, linenum, bad_options = 0;
1.136 dtucker 1644: char *cp, *obuf, *cbuf;
1.134 djm 1645:
1646: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1647:
1.136 dtucker 1648: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.226 dtucker 1649: active = connectinfo ? 0 : 1;
1.137 dtucker 1650: linenum = 1;
1.140 deraadt 1651: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1652: if (process_server_config_line(options, cp, filename,
1.226 dtucker 1653: linenum++, &active, connectinfo) != 0)
1.94 markus 1654: bad_options++;
1.1 deraadt 1655: }
1.136 dtucker 1656: xfree(obuf);
1.78 stevesk 1657: if (bad_options > 0)
1658: fatal("%s: terminating, %d bad configuration options",
1659: filename, bad_options);
1.182 dtucker 1660: }
1661:
1662: static const char *
1.221 djm 1663: fmt_multistate_int(int val, const struct multistate *m)
1664: {
1665: u_int i;
1666:
1667: for (i = 0; m[i].key != NULL; i++) {
1668: if (m[i].value == val)
1669: return m[i].key;
1670: }
1671: return "UNKNOWN";
1672: }
1673:
1674: static const char *
1.182 dtucker 1675: fmt_intarg(ServerOpCodes code, int val)
1676: {
1.221 djm 1677: if (val == -1)
1678: return "unset";
1679: switch (code) {
1680: case sAddressFamily:
1681: return fmt_multistate_int(val, multistate_addressfamily);
1682: case sPermitRootLogin:
1683: return fmt_multistate_int(val, multistate_permitrootlogin);
1684: case sGatewayPorts:
1685: return fmt_multistate_int(val, multistate_gatewayports);
1686: case sCompression:
1687: return fmt_multistate_int(val, multistate_compression);
1.222 djm 1688: case sUsePrivilegeSeparation:
1689: return fmt_multistate_int(val, multistate_privsep);
1.221 djm 1690: case sProtocol:
1.182 dtucker 1691: switch (val) {
1692: case SSH_PROTO_1:
1693: return "1";
1694: case SSH_PROTO_2:
1695: return "2";
1696: case (SSH_PROTO_1|SSH_PROTO_2):
1697: return "2,1";
1698: default:
1699: return "UNKNOWN";
1700: }
1.221 djm 1701: default:
1702: switch (val) {
1703: case 0:
1704: return "no";
1705: case 1:
1706: return "yes";
1707: default:
1708: return "UNKNOWN";
1709: }
1.182 dtucker 1710: }
1711: }
1712:
1713: static const char *
1714: lookup_opcode_name(ServerOpCodes code)
1715: {
1716: u_int i;
1717:
1718: for (i = 0; keywords[i].name != NULL; i++)
1719: if (keywords[i].opcode == code)
1720: return(keywords[i].name);
1721: return "UNKNOWN";
1722: }
1723:
1724: static void
1725: dump_cfg_int(ServerOpCodes code, int val)
1726: {
1727: printf("%s %d\n", lookup_opcode_name(code), val);
1728: }
1729:
1730: static void
1731: dump_cfg_fmtint(ServerOpCodes code, int val)
1732: {
1733: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
1734: }
1735:
1736: static void
1737: dump_cfg_string(ServerOpCodes code, const char *val)
1738: {
1739: if (val == NULL)
1740: return;
1741: printf("%s %s\n", lookup_opcode_name(code), val);
1742: }
1743:
1744: static void
1745: dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
1746: {
1747: u_int i;
1748:
1749: for (i = 0; i < count; i++)
1.219 djm 1750: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
1751: }
1752:
1753: static void
1754: dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
1755: {
1756: u_int i;
1757:
1758: printf("%s", lookup_opcode_name(code));
1759: for (i = 0; i < count; i++)
1760: printf(" %s", vals[i]);
1761: printf("\n");
1.182 dtucker 1762: }
1763:
1764: void
1765: dump_config(ServerOptions *o)
1766: {
1767: u_int i;
1768: int ret;
1769: struct addrinfo *ai;
1770: char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL;
1771:
1772: /* these are usually at the top of the config */
1773: for (i = 0; i < o->num_ports; i++)
1774: printf("port %d\n", o->ports[i]);
1775: dump_cfg_fmtint(sProtocol, o->protocol);
1776: dump_cfg_fmtint(sAddressFamily, o->address_family);
1777:
1778: /* ListenAddress must be after Port */
1779: for (ai = o->listen_addrs; ai; ai = ai->ai_next) {
1780: if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1781: sizeof(addr), port, sizeof(port),
1782: NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1783: error("getnameinfo failed: %.100s",
1784: (ret != EAI_SYSTEM) ? gai_strerror(ret) :
1785: strerror(errno));
1786: } else {
1787: if (ai->ai_family == AF_INET6)
1788: printf("listenaddress [%s]:%s\n", addr, port);
1789: else
1790: printf("listenaddress %s:%s\n", addr, port);
1791: }
1792: }
1793:
1794: /* integer arguments */
1795: dump_cfg_int(sServerKeyBits, o->server_key_bits);
1796: dump_cfg_int(sLoginGraceTime, o->login_grace_time);
1797: dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time);
1798: dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
1799: dump_cfg_int(sMaxAuthTries, o->max_authtries);
1.189 djm 1800: dump_cfg_int(sMaxSessions, o->max_sessions);
1.182 dtucker 1801: dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
1802: dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
1803:
1804: /* formatted integer arguments */
1805: dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
1806: dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
1807: dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
1808: dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication);
1809: dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
1810: dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
1811: o->hostbased_uses_name_from_packet_only);
1812: dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication);
1813: dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
1.187 djm 1814: #ifdef KRB5
1.182 dtucker 1815: dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
1816: dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
1817: dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
1818: dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
1.187 djm 1819: #endif
1820: #ifdef GSSAPI
1.182 dtucker 1821: dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
1822: dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
1.190 djm 1823: #endif
1824: #ifdef JPAKE
1825: dump_cfg_fmtint(sZeroKnowledgePasswordAuthentication,
1826: o->zero_knowledge_password_authentication);
1.187 djm 1827: #endif
1.182 dtucker 1828: dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
1829: dump_cfg_fmtint(sKbdInteractiveAuthentication,
1830: o->kbd_interactive_authentication);
1831: dump_cfg_fmtint(sChallengeResponseAuthentication,
1832: o->challenge_response_authentication);
1833: dump_cfg_fmtint(sPrintMotd, o->print_motd);
1834: dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
1835: dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
1836: dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
1837: dump_cfg_fmtint(sStrictModes, o->strict_modes);
1838: dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
1839: dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
1840: dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
1841: dump_cfg_fmtint(sUseLogin, o->use_login);
1842: dump_cfg_fmtint(sCompression, o->compression);
1843: dump_cfg_fmtint(sGatewayPorts, o->gateway_ports);
1844: dump_cfg_fmtint(sUseDNS, o->use_dns);
1845: dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
1846: dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
1847:
1848: /* string arguments */
1849: dump_cfg_string(sPidFile, o->pid_file);
1850: dump_cfg_string(sXAuthLocation, o->xauth_location);
1851: dump_cfg_string(sCiphers, o->ciphers);
1852: dump_cfg_string(sMacs, o->macs);
1853: dump_cfg_string(sBanner, o->banner);
1854: dump_cfg_string(sForceCommand, o->adm_forced_command);
1.201 dtucker 1855: dump_cfg_string(sChrootDirectory, o->chroot_directory);
1.204 djm 1856: dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
1857: dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
1.208 djm 1858: dump_cfg_string(sAuthorizedPrincipalsFile,
1859: o->authorized_principals_file);
1.225 djm 1860: dump_cfg_string(sVersionAddendum, o->version_addendum);
1.182 dtucker 1861:
1862: /* string arguments requiring a lookup */
1863: dump_cfg_string(sLogLevel, log_level_name(o->log_level));
1864: dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
1865:
1866: /* string array arguments */
1.219 djm 1867: dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
1868: o->authorized_keys_files);
1.182 dtucker 1869: dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
1870: o->host_key_files);
1.203 djm 1871: dump_cfg_strarray(sHostKeyFile, o->num_host_cert_files,
1872: o->host_cert_files);
1.182 dtucker 1873: dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
1874: dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
1875: dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
1876: dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
1877: dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
1878:
1879: /* other arguments */
1880: for (i = 0; i < o->num_subsystems; i++)
1881: printf("subsystem %s %s\n", o->subsystem_name[i],
1882: o->subsystem_args[i]);
1883:
1884: printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
1885: o->max_startups_rate, o->max_startups);
1886:
1887: for (i = 0; tunmode_desc[i].val != -1; i++)
1888: if (tunmode_desc[i].val == o->permit_tun) {
1889: s = tunmode_desc[i].text;
1890: break;
1891: }
1892: dump_cfg_string(sPermitTunnel, s);
1.213 djm 1893:
1.214 stevesk 1894: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
1895: printf("%s\n", iptos2str(o->ip_qos_bulk));
1.182 dtucker 1896:
1897: channel_print_adm_permitted_opens();
1.1 deraadt 1898: }
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