Annotation of src/usr.bin/ssh/servconf.c, Revision 1.164
1.164 ! deraadt 1: /* $OpenBSD: servconf.c,v 1.163 2006/08/01 23:36:12 stevesk Exp $ */
1.1 deraadt 2: /*
1.26 deraadt 3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.34 markus 5: *
1.51 deraadt 6: * As far as I am concerned, the code I have written for this software
7: * can be used freely for any purpose. Any derived versions of this
8: * software must be clearly marked as such, and if the derived work is
9: * incompatible with the protocol description in the RFC file, it must be
10: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 11: */
1.1 deraadt 12:
1.152 stevesk 13: #include <sys/types.h>
14: #include <sys/socket.h>
1.154 stevesk 15:
16: #include <netdb.h>
1.162 stevesk 17: #include <stdio.h>
1.161 stevesk 18: #include <stdlib.h>
1.160 stevesk 19: #include <string.h>
1.164 ! deraadt 20: #include <signal.h>
1.155 stevesk 21: #include <unistd.h>
1.164 ! deraadt 22: #include <stdarg.h>
1.1 deraadt 23:
1.164 ! deraadt 24: #include "xmalloc.h"
1.1 deraadt 25: #include "ssh.h"
1.62 markus 26: #include "log.h"
1.164 ! deraadt 27: #include "buffer.h"
1.1 deraadt 28: #include "servconf.h"
1.33 markus 29: #include "compat.h"
1.60 markus 30: #include "pathnames.h"
1.62 markus 31: #include "misc.h"
32: #include "cipher.h"
1.164 ! deraadt 33: #include "key.h"
1.66 markus 34: #include "kex.h"
35: #include "mac.h"
1.153 dtucker 36: #include "match.h"
1.156 dtucker 37: #include "channels.h"
1.1 deraadt 38:
1.84 itojun 39: static void add_listen_addr(ServerOptions *, char *, u_short);
40: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 41:
1.102 provos 42: /* Use of privilege separation or not */
43: extern int use_privsep;
1.153 dtucker 44: extern Buffer cfg;
1.62 markus 45:
1.1 deraadt 46: /* Initializes the server options to their default values. */
47:
1.34 markus 48: void
1.25 markus 49: initialize_server_options(ServerOptions *options)
1.1 deraadt 50: {
1.25 markus 51: memset(options, 0, sizeof(*options));
1.29 markus 52: options->num_ports = 0;
53: options->ports_from_cmdline = 0;
54: options->listen_addrs = NULL;
1.138 djm 55: options->address_family = -1;
1.54 markus 56: options->num_host_key_files = 0;
1.36 markus 57: options->pid_file = NULL;
1.25 markus 58: options->server_key_bits = -1;
59: options->login_grace_time = -1;
60: options->key_regeneration_time = -1;
1.67 markus 61: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 62: options->ignore_rhosts = -1;
63: options->ignore_user_known_hosts = -1;
64: options->print_motd = -1;
1.72 stevesk 65: options->print_lastlog = -1;
1.25 markus 66: options->x11_forwarding = -1;
67: options->x11_display_offset = -1;
1.99 stevesk 68: options->x11_use_localhost = -1;
1.42 markus 69: options->xauth_location = NULL;
1.25 markus 70: options->strict_modes = -1;
1.129 markus 71: options->tcp_keep_alive = -1;
1.101 markus 72: options->log_facility = SYSLOG_FACILITY_NOT_SET;
73: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 74: options->rhosts_rsa_authentication = -1;
1.75 markus 75: options->hostbased_authentication = -1;
76: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 77: options->rsa_authentication = -1;
1.54 markus 78: options->pubkey_authentication = -1;
1.25 markus 79: options->kerberos_authentication = -1;
80: options->kerberos_or_local_passwd = -1;
81: options->kerberos_ticket_cleanup = -1;
1.130 jakob 82: options->kerberos_get_afs_token = -1;
1.125 markus 83: options->gss_authentication=-1;
84: options->gss_cleanup_creds = -1;
1.25 markus 85: options->password_authentication = -1;
1.52 markus 86: options->kbd_interactive_authentication = -1;
1.80 markus 87: options->challenge_response_authentication = -1;
1.25 markus 88: options->permit_empty_passwd = -1;
1.113 markus 89: options->permit_user_env = -1;
1.25 markus 90: options->use_login = -1;
1.111 markus 91: options->compression = -1;
1.53 markus 92: options->allow_tcp_forwarding = -1;
1.25 markus 93: options->num_allow_users = 0;
94: options->num_deny_users = 0;
95: options->num_allow_groups = 0;
96: options->num_deny_groups = 0;
1.33 markus 97: options->ciphers = NULL;
1.66 markus 98: options->macs = NULL;
1.33 markus 99: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 100: options->gateway_ports = -1;
1.43 jakob 101: options->num_subsystems = 0;
1.50 markus 102: options->max_startups_begin = -1;
103: options->max_startups_rate = -1;
1.46 markus 104: options->max_startups = -1;
1.133 dtucker 105: options->max_authtries = -1;
1.57 markus 106: options->banner = NULL;
1.122 markus 107: options->use_dns = -1;
1.77 beck 108: options->client_alive_interval = -1;
109: options->client_alive_count_max = -1;
1.82 markus 110: options->authorized_keys_file = NULL;
111: options->authorized_keys_file2 = NULL;
1.131 djm 112: options->num_accept_env = 0;
1.145 reyk 113: options->permit_tun = -1;
1.159 dtucker 114: options->num_permitted_opens = -1;
1.158 dtucker 115: options->adm_forced_command = NULL;
1.1 deraadt 116: }
117:
1.34 markus 118: void
1.25 markus 119: fill_default_server_options(ServerOptions *options)
1.1 deraadt 120: {
1.54 markus 121: if (options->protocol == SSH_PROTO_UNKNOWN)
122: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
123: if (options->num_host_key_files == 0) {
124: /* fill default hostkeys for protocols */
125: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 126: options->host_key_files[options->num_host_key_files++] =
127: _PATH_HOST_KEY_FILE;
128: if (options->protocol & SSH_PROTO_2) {
129: options->host_key_files[options->num_host_key_files++] =
130: _PATH_HOST_RSA_KEY_FILE;
131: options->host_key_files[options->num_host_key_files++] =
132: _PATH_HOST_DSA_KEY_FILE;
133: }
1.54 markus 134: }
1.29 markus 135: if (options->num_ports == 0)
136: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
137: if (options->listen_addrs == NULL)
1.76 stevesk 138: add_listen_addr(options, NULL, 0);
1.36 markus 139: if (options->pid_file == NULL)
1.60 markus 140: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 141: if (options->server_key_bits == -1)
142: options->server_key_bits = 768;
143: if (options->login_grace_time == -1)
1.115 stevesk 144: options->login_grace_time = 120;
1.25 markus 145: if (options->key_regeneration_time == -1)
146: options->key_regeneration_time = 3600;
1.67 markus 147: if (options->permit_root_login == PERMIT_NOT_SET)
148: options->permit_root_login = PERMIT_YES;
1.25 markus 149: if (options->ignore_rhosts == -1)
1.30 markus 150: options->ignore_rhosts = 1;
1.25 markus 151: if (options->ignore_user_known_hosts == -1)
152: options->ignore_user_known_hosts = 0;
153: if (options->print_motd == -1)
154: options->print_motd = 1;
1.72 stevesk 155: if (options->print_lastlog == -1)
156: options->print_lastlog = 1;
1.25 markus 157: if (options->x11_forwarding == -1)
1.30 markus 158: options->x11_forwarding = 0;
1.25 markus 159: if (options->x11_display_offset == -1)
1.30 markus 160: options->x11_display_offset = 10;
1.99 stevesk 161: if (options->x11_use_localhost == -1)
162: options->x11_use_localhost = 1;
1.42 markus 163: if (options->xauth_location == NULL)
1.83 markus 164: options->xauth_location = _PATH_XAUTH;
1.25 markus 165: if (options->strict_modes == -1)
166: options->strict_modes = 1;
1.129 markus 167: if (options->tcp_keep_alive == -1)
168: options->tcp_keep_alive = 1;
1.101 markus 169: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 170: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 171: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 172: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 173: if (options->rhosts_rsa_authentication == -1)
1.30 markus 174: options->rhosts_rsa_authentication = 0;
1.75 markus 175: if (options->hostbased_authentication == -1)
176: options->hostbased_authentication = 0;
177: if (options->hostbased_uses_name_from_packet_only == -1)
178: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 179: if (options->rsa_authentication == -1)
180: options->rsa_authentication = 1;
1.54 markus 181: if (options->pubkey_authentication == -1)
182: options->pubkey_authentication = 1;
1.25 markus 183: if (options->kerberos_authentication == -1)
1.107 markus 184: options->kerberos_authentication = 0;
1.25 markus 185: if (options->kerberos_or_local_passwd == -1)
186: options->kerberos_or_local_passwd = 1;
187: if (options->kerberos_ticket_cleanup == -1)
188: options->kerberos_ticket_cleanup = 1;
1.130 jakob 189: if (options->kerberos_get_afs_token == -1)
190: options->kerberos_get_afs_token = 0;
1.125 markus 191: if (options->gss_authentication == -1)
192: options->gss_authentication = 0;
193: if (options->gss_cleanup_creds == -1)
194: options->gss_cleanup_creds = 1;
1.25 markus 195: if (options->password_authentication == -1)
196: options->password_authentication = 1;
1.52 markus 197: if (options->kbd_interactive_authentication == -1)
198: options->kbd_interactive_authentication = 0;
1.80 markus 199: if (options->challenge_response_authentication == -1)
200: options->challenge_response_authentication = 1;
1.25 markus 201: if (options->permit_empty_passwd == -1)
1.30 markus 202: options->permit_empty_passwd = 0;
1.113 markus 203: if (options->permit_user_env == -1)
204: options->permit_user_env = 0;
1.25 markus 205: if (options->use_login == -1)
206: options->use_login = 0;
1.111 markus 207: if (options->compression == -1)
1.143 markus 208: options->compression = COMP_DELAYED;
1.53 markus 209: if (options->allow_tcp_forwarding == -1)
210: options->allow_tcp_forwarding = 1;
1.38 markus 211: if (options->gateway_ports == -1)
212: options->gateway_ports = 0;
1.46 markus 213: if (options->max_startups == -1)
214: options->max_startups = 10;
1.50 markus 215: if (options->max_startups_rate == -1)
216: options->max_startups_rate = 100; /* 100% */
217: if (options->max_startups_begin == -1)
218: options->max_startups_begin = options->max_startups;
1.133 dtucker 219: if (options->max_authtries == -1)
220: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.122 markus 221: if (options->use_dns == -1)
222: options->use_dns = 1;
1.77 beck 223: if (options->client_alive_interval == -1)
1.95 deraadt 224: options->client_alive_interval = 0;
1.77 beck 225: if (options->client_alive_count_max == -1)
226: options->client_alive_count_max = 3;
1.90 markus 227: if (options->authorized_keys_file2 == NULL) {
228: /* authorized_keys_file2 falls back to authorized_keys_file */
229: if (options->authorized_keys_file != NULL)
230: options->authorized_keys_file2 = options->authorized_keys_file;
231: else
232: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
233: }
234: if (options->authorized_keys_file == NULL)
235: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.145 reyk 236: if (options->permit_tun == -1)
1.146 reyk 237: options->permit_tun = SSH_TUNMODE_NO;
1.102 provos 238:
1.110 markus 239: /* Turn privilege separation on by default */
1.102 provos 240: if (use_privsep == -1)
1.110 markus 241: use_privsep = 1;
1.1 deraadt 242: }
243:
244: /* Keyword tokens. */
1.25 markus 245: typedef enum {
246: sBadOption, /* == unknown option */
247: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
248: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 249: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 250: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 251: sKerberosGetAFSToken,
1.123 markus 252: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 253: sPasswordAuthentication, sKbdInteractiveAuthentication,
254: sListenAddress, sAddressFamily,
1.72 stevesk 255: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 256: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 257: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 258: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 259: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 260: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 261: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
262: sMaxStartups, sMaxAuthTries,
1.122 markus 263: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 264: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 265: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.145 reyk 266: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.158 dtucker 267: sMatch, sPermitOpen, sForceCommand,
1.105 stevesk 268: sUsePrivilegeSeparation,
1.121 jakob 269: sDeprecated, sUnsupported
1.1 deraadt 270: } ServerOpCodes;
271:
1.153 dtucker 272: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
273: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
274: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
275:
1.1 deraadt 276: /* Textual representation of the tokens. */
1.25 markus 277: static struct {
278: const char *name;
279: ServerOpCodes opcode;
1.153 dtucker 280: u_int flags;
1.25 markus 281: } keywords[] = {
1.153 dtucker 282: { "port", sPort, SSHCFG_GLOBAL },
283: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
284: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
285: { "pidfile", sPidFile, SSHCFG_GLOBAL },
286: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
287: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
288: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
289: { "permitrootlogin", sPermitRootLogin, SSHCFG_GLOBAL },
290: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
291: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
292: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
293: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_GLOBAL },
294: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_GLOBAL },
295: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL },
296: { "rsaauthentication", sRSAAuthentication, SSHCFG_GLOBAL },
297: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL },
298: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 299: #ifdef KRB5
1.153 dtucker 300: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_GLOBAL },
301: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
302: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
303: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 304: #else
1.153 dtucker 305: { "kerberosauthentication", sUnsupported, SSHCFG_GLOBAL },
306: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
307: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
308: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 309: #endif
1.153 dtucker 310: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
311: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 312: #ifdef GSSAPI
1.153 dtucker 313: { "gssapiauthentication", sGssAuthentication, SSHCFG_GLOBAL },
314: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.125 markus 315: #else
1.153 dtucker 316: { "gssapiauthentication", sUnsupported, SSHCFG_GLOBAL },
317: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 318: #endif
1.153 dtucker 319: { "passwordauthentication", sPasswordAuthentication, SSHCFG_GLOBAL },
320: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_GLOBAL },
321: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
322: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
323: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
324: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
325: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
326: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
327: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
328: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
329: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 330: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
331: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
332: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 333: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
334: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
335: { "permitemptypasswords", sEmptyPasswd, SSHCFG_GLOBAL },
336: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
337: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
338: { "compression", sCompression, SSHCFG_GLOBAL },
339: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
340: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
341: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
342: { "allowusers", sAllowUsers, SSHCFG_GLOBAL },
343: { "denyusers", sDenyUsers, SSHCFG_GLOBAL },
344: { "allowgroups", sAllowGroups, SSHCFG_GLOBAL },
345: { "denygroups", sDenyGroups, SSHCFG_GLOBAL },
346: { "ciphers", sCiphers, SSHCFG_GLOBAL },
347: { "macs", sMacs, SSHCFG_GLOBAL },
348: { "protocol", sProtocol, SSHCFG_GLOBAL },
349: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
350: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
351: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
352: { "maxauthtries", sMaxAuthTries, SSHCFG_GLOBAL },
353: { "banner", sBanner, SSHCFG_GLOBAL },
354: { "usedns", sUseDNS, SSHCFG_GLOBAL },
355: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
356: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
357: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
358: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
359: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL },
360: { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL },
361: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
362: { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL },
363: { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL },
364: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 365: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 366: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.153 dtucker 367: { NULL, sBadOption, 0 }
1.1 deraadt 368: };
369:
1.27 markus 370: /*
1.73 stevesk 371: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 372: */
1.1 deraadt 373:
1.34 markus 374: static ServerOpCodes
1.25 markus 375: parse_token(const char *cp, const char *filename,
1.153 dtucker 376: int linenum, u_int *flags)
1.1 deraadt 377: {
1.55 markus 378: u_int i;
1.1 deraadt 379:
1.25 markus 380: for (i = 0; keywords[i].name; i++)
1.153 dtucker 381: if (strcasecmp(cp, keywords[i].name) == 0) {
382: *flags = keywords[i].flags;
1.25 markus 383: return keywords[i].opcode;
1.153 dtucker 384: }
1.25 markus 385:
1.78 stevesk 386: error("%s: line %d: Bad configuration option: %s",
387: filename, linenum, cp);
1.25 markus 388: return sBadOption;
1.1 deraadt 389: }
390:
1.84 itojun 391: static void
1.76 stevesk 392: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 393: {
1.142 djm 394: u_int i;
1.74 stevesk 395:
396: if (options->num_ports == 0)
397: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 398: if (options->address_family == -1)
399: options->address_family = AF_UNSPEC;
1.76 stevesk 400: if (port == 0)
1.74 stevesk 401: for (i = 0; i < options->num_ports; i++)
402: add_one_listen_addr(options, addr, options->ports[i]);
403: else
1.76 stevesk 404: add_one_listen_addr(options, addr, port);
1.74 stevesk 405: }
406:
1.84 itojun 407: static void
1.74 stevesk 408: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 409: {
410: struct addrinfo hints, *ai, *aitop;
411: char strport[NI_MAXSERV];
412: int gaierr;
413:
1.74 stevesk 414: memset(&hints, 0, sizeof(hints));
1.138 djm 415: hints.ai_family = options->address_family;
1.74 stevesk 416: hints.ai_socktype = SOCK_STREAM;
417: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 418: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 419: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
420: fatal("bad addr or host: %s (%s)",
421: addr ? addr : "<NULL>",
422: gai_strerror(gaierr));
423: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
424: ;
425: ai->ai_next = options->listen_addrs;
426: options->listen_addrs = aitop;
1.29 markus 427: }
428:
1.153 dtucker 429: /*
430: * The strategy for the Match blocks is that the config file is parsed twice.
431: *
432: * The first time is at startup. activep is initialized to 1 and the
433: * directives in the global context are processed and acted on. Hitting a
434: * Match directive unsets activep and the directives inside the block are
435: * checked for syntax only.
436: *
437: * The second time is after a connection has been established but before
438: * authentication. activep is initialized to 2 and global config directives
439: * are ignored since they have already been processed. If the criteria in a
440: * Match block is met, activep is set and the subsequent directives
441: * processed and actioned until EOF or another Match block unsets it. Any
442: * options set are copied into the main server config.
443: *
444: * Potential additions/improvements:
445: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
446: *
447: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
448: * Match Address 192.168.0.*
449: * Tag trusted
450: * Match Group wheel
451: * Tag trusted
452: * Match Tag trusted
453: * AllowTcpForwarding yes
454: * GatewayPorts clientspecified
455: * [...]
456: *
457: * - Add a PermittedChannelRequests directive
458: * Match Group shell
459: * PermittedChannelRequests session,forwarded-tcpip
460: */
461:
462: static int
463: match_cfg_line(char **condition, int line, const char *user, const char *host,
464: const char *address)
465: {
466: int result = 1;
467: char *arg, *attrib, *cp = *condition;
468: size_t len;
469:
470: if (user == NULL)
471: debug3("checking syntax for 'Match %s'", cp);
472: else
473: debug3("checking match for '%s' user %s host %s addr %s", cp,
474: user ? user : "(null)", host ? host : "(null)",
475: address ? address : "(null)");
476:
477: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
478: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
479: error("Missing Match criteria for %s", attrib);
480: return -1;
481: }
482: len = strlen(arg);
483: if (strcasecmp(attrib, "user") == 0) {
484: if (!user) {
485: result = 0;
486: continue;
487: }
488: if (match_pattern_list(user, arg, len, 0) != 1)
489: result = 0;
490: else
491: debug("user %.100s matched 'User %.100s' at "
492: "line %d", user, arg, line);
493: } else if (strcasecmp(attrib, "host") == 0) {
494: if (!host) {
495: result = 0;
496: continue;
497: }
498: if (match_hostname(host, arg, len) != 1)
499: result = 0;
500: else
501: debug("connection from %.100s matched 'Host "
502: "%.100s' at line %d", host, arg, line);
503: } else if (strcasecmp(attrib, "address") == 0) {
504: debug("address '%s' arg '%s'", address, arg);
505: if (!address) {
506: result = 0;
507: continue;
508: }
509: if (match_hostname(address, arg, len) != 1)
510: result = 0;
511: else
512: debug("connection from %.100s matched 'Address "
513: "%.100s' at line %d", address, arg, line);
514: } else {
515: error("Unsupported Match attribute %s", attrib);
516: return -1;
517: }
518: }
519: if (user != NULL)
520: debug3("match %sfound", result ? "" : "not ");
521: *condition = cp;
522: return result;
523: }
524:
1.158 dtucker 525: #define WHITESPACE " \t\r\n"
526:
1.94 markus 527: int
528: process_server_config_line(ServerOptions *options, char *line,
1.153 dtucker 529: const char *filename, int linenum, int *activep, const char *user,
530: const char *host, const char *address)
1.1 deraadt 531: {
1.74 stevesk 532: char *cp, **charptr, *arg, *p;
1.153 dtucker 533: int cmdline = 0, *intptr, value, n;
1.25 markus 534: ServerOpCodes opcode;
1.139 djm 535: u_short port;
1.153 dtucker 536: u_int i, flags = 0;
1.151 djm 537: size_t len;
1.25 markus 538:
1.94 markus 539: cp = line;
1.148 dtucker 540: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 541: return 0;
1.94 markus 542: /* Ignore leading whitespace */
543: if (*arg == '\0')
544: arg = strdelim(&cp);
545: if (!arg || !*arg || *arg == '#')
546: return 0;
547: intptr = NULL;
548: charptr = NULL;
1.153 dtucker 549: opcode = parse_token(arg, filename, linenum, &flags);
550:
551: if (activep == NULL) { /* We are processing a command line directive */
552: cmdline = 1;
553: activep = &cmdline;
554: }
555: if (*activep && opcode != sMatch)
556: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
557: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
558: if (user == NULL) {
559: fatal("%s line %d: Directive '%s' is not allowed "
560: "within a Match block", filename, linenum, arg);
561: } else { /* this is a directive we have already processed */
562: while (arg)
563: arg = strdelim(&cp);
564: return 0;
565: }
566: }
567:
1.94 markus 568: switch (opcode) {
569: case sBadOption:
570: return -1;
571: case sPort:
572: /* ignore ports from configfile if cmdline specifies ports */
573: if (options->ports_from_cmdline)
574: return 0;
575: if (options->listen_addrs != NULL)
576: fatal("%s line %d: ports must be specified before "
1.98 stevesk 577: "ListenAddress.", filename, linenum);
1.94 markus 578: if (options->num_ports >= MAX_PORTS)
579: fatal("%s line %d: too many ports.",
580: filename, linenum);
1.48 provos 581: arg = strdelim(&cp);
1.94 markus 582: if (!arg || *arg == '\0')
583: fatal("%s line %d: missing port number.",
584: filename, linenum);
585: options->ports[options->num_ports++] = a2port(arg);
586: if (options->ports[options->num_ports-1] == 0)
587: fatal("%s line %d: Badly formatted port number.",
588: filename, linenum);
589: break;
1.29 markus 590:
1.94 markus 591: case sServerKeyBits:
592: intptr = &options->server_key_bits;
1.25 markus 593: parse_int:
1.94 markus 594: arg = strdelim(&cp);
595: if (!arg || *arg == '\0')
596: fatal("%s line %d: missing integer value.",
597: filename, linenum);
598: value = atoi(arg);
1.153 dtucker 599: if (*activep && *intptr == -1)
1.94 markus 600: *intptr = value;
601: break;
1.25 markus 602:
1.94 markus 603: case sLoginGraceTime:
604: intptr = &options->login_grace_time;
1.81 stevesk 605: parse_time:
1.94 markus 606: arg = strdelim(&cp);
607: if (!arg || *arg == '\0')
608: fatal("%s line %d: missing time value.",
609: filename, linenum);
610: if ((value = convtime(arg)) == -1)
611: fatal("%s line %d: invalid time value.",
612: filename, linenum);
613: if (*intptr == -1)
614: *intptr = value;
615: break;
616:
617: case sKeyRegenerationTime:
618: intptr = &options->key_regeneration_time;
619: goto parse_time;
620:
621: case sListenAddress:
622: arg = strdelim(&cp);
1.139 djm 623: if (arg == NULL || *arg == '\0')
624: fatal("%s line %d: missing address",
1.94 markus 625: filename, linenum);
1.144 dtucker 626: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
627: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
628: && strchr(p+1, ':') != NULL) {
629: add_listen_addr(options, arg, 0);
630: break;
631: }
1.139 djm 632: p = hpdelim(&arg);
633: if (p == NULL)
634: fatal("%s line %d: bad address:port usage",
635: filename, linenum);
636: p = cleanhostname(p);
637: if (arg == NULL)
638: port = 0;
639: else if ((port = a2port(arg)) == 0)
640: fatal("%s line %d: bad port number", filename, linenum);
641:
642: add_listen_addr(options, p, port);
1.25 markus 643:
1.138 djm 644: break;
645:
646: case sAddressFamily:
647: arg = strdelim(&cp);
1.141 markus 648: if (!arg || *arg == '\0')
649: fatal("%s line %d: missing address family.",
650: filename, linenum);
1.138 djm 651: intptr = &options->address_family;
652: if (options->listen_addrs != NULL)
653: fatal("%s line %d: address family must be specified before "
654: "ListenAddress.", filename, linenum);
655: if (strcasecmp(arg, "inet") == 0)
656: value = AF_INET;
657: else if (strcasecmp(arg, "inet6") == 0)
658: value = AF_INET6;
659: else if (strcasecmp(arg, "any") == 0)
660: value = AF_UNSPEC;
661: else
662: fatal("%s line %d: unsupported address family \"%s\".",
663: filename, linenum, arg);
664: if (*intptr == -1)
665: *intptr = value;
1.94 markus 666: break;
667:
668: case sHostKeyFile:
669: intptr = &options->num_host_key_files;
670: if (*intptr >= MAX_HOSTKEYS)
671: fatal("%s line %d: too many host keys specified (max %d).",
672: filename, linenum, MAX_HOSTKEYS);
673: charptr = &options->host_key_files[*intptr];
674: parse_filename:
675: arg = strdelim(&cp);
676: if (!arg || *arg == '\0')
677: fatal("%s line %d: missing file name.",
678: filename, linenum);
1.153 dtucker 679: if (*activep && *charptr == NULL) {
1.94 markus 680: *charptr = tilde_expand_filename(arg, getuid());
681: /* increase optional counter */
682: if (intptr != NULL)
683: *intptr = *intptr + 1;
684: }
685: break;
1.76 stevesk 686:
1.94 markus 687: case sPidFile:
688: charptr = &options->pid_file;
689: goto parse_filename;
1.25 markus 690:
1.94 markus 691: case sPermitRootLogin:
692: intptr = &options->permit_root_login;
693: arg = strdelim(&cp);
694: if (!arg || *arg == '\0')
695: fatal("%s line %d: missing yes/"
696: "without-password/forced-commands-only/no "
697: "argument.", filename, linenum);
698: value = 0; /* silence compiler */
699: if (strcmp(arg, "without-password") == 0)
700: value = PERMIT_NO_PASSWD;
701: else if (strcmp(arg, "forced-commands-only") == 0)
702: value = PERMIT_FORCED_ONLY;
703: else if (strcmp(arg, "yes") == 0)
704: value = PERMIT_YES;
705: else if (strcmp(arg, "no") == 0)
706: value = PERMIT_NO;
707: else
708: fatal("%s line %d: Bad yes/"
709: "without-password/forced-commands-only/no "
710: "argument: %s", filename, linenum, arg);
711: if (*intptr == -1)
712: *intptr = value;
713: break;
1.36 markus 714:
1.94 markus 715: case sIgnoreRhosts:
716: intptr = &options->ignore_rhosts;
1.25 markus 717: parse_flag:
1.94 markus 718: arg = strdelim(&cp);
719: if (!arg || *arg == '\0')
720: fatal("%s line %d: missing yes/no argument.",
721: filename, linenum);
722: value = 0; /* silence compiler */
723: if (strcmp(arg, "yes") == 0)
724: value = 1;
725: else if (strcmp(arg, "no") == 0)
726: value = 0;
727: else
728: fatal("%s line %d: Bad yes/no argument: %s",
729: filename, linenum, arg);
1.153 dtucker 730: if (*activep && *intptr == -1)
1.94 markus 731: *intptr = value;
732: break;
733:
734: case sIgnoreUserKnownHosts:
735: intptr = &options->ignore_user_known_hosts;
736: goto parse_flag;
737:
738: case sRhostsRSAAuthentication:
739: intptr = &options->rhosts_rsa_authentication;
740: goto parse_flag;
741:
742: case sHostbasedAuthentication:
743: intptr = &options->hostbased_authentication;
744: goto parse_flag;
745:
746: case sHostbasedUsesNameFromPacketOnly:
747: intptr = &options->hostbased_uses_name_from_packet_only;
748: goto parse_flag;
749:
750: case sRSAAuthentication:
751: intptr = &options->rsa_authentication;
752: goto parse_flag;
753:
754: case sPubkeyAuthentication:
755: intptr = &options->pubkey_authentication;
756: goto parse_flag;
1.119 jakob 757:
1.94 markus 758: case sKerberosAuthentication:
759: intptr = &options->kerberos_authentication;
760: goto parse_flag;
761:
762: case sKerberosOrLocalPasswd:
763: intptr = &options->kerberos_or_local_passwd;
764: goto parse_flag;
765:
766: case sKerberosTicketCleanup:
767: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 768: goto parse_flag;
769:
770: case sKerberosGetAFSToken:
771: intptr = &options->kerberos_get_afs_token;
1.125 markus 772: goto parse_flag;
773:
774: case sGssAuthentication:
775: intptr = &options->gss_authentication;
776: goto parse_flag;
777:
778: case sGssCleanupCreds:
779: intptr = &options->gss_cleanup_creds;
1.94 markus 780: goto parse_flag;
781:
782: case sPasswordAuthentication:
783: intptr = &options->password_authentication;
784: goto parse_flag;
785:
786: case sKbdInteractiveAuthentication:
787: intptr = &options->kbd_interactive_authentication;
788: goto parse_flag;
789:
790: case sChallengeResponseAuthentication:
791: intptr = &options->challenge_response_authentication;
792: goto parse_flag;
793:
794: case sPrintMotd:
795: intptr = &options->print_motd;
796: goto parse_flag;
797:
798: case sPrintLastLog:
799: intptr = &options->print_lastlog;
800: goto parse_flag;
801:
802: case sX11Forwarding:
803: intptr = &options->x11_forwarding;
804: goto parse_flag;
805:
806: case sX11DisplayOffset:
807: intptr = &options->x11_display_offset;
808: goto parse_int;
1.99 stevesk 809:
810: case sX11UseLocalhost:
811: intptr = &options->x11_use_localhost;
812: goto parse_flag;
1.94 markus 813:
814: case sXAuthLocation:
815: charptr = &options->xauth_location;
816: goto parse_filename;
817:
818: case sStrictModes:
819: intptr = &options->strict_modes;
820: goto parse_flag;
821:
1.129 markus 822: case sTCPKeepAlive:
823: intptr = &options->tcp_keep_alive;
1.94 markus 824: goto parse_flag;
825:
826: case sEmptyPasswd:
827: intptr = &options->permit_empty_passwd;
1.113 markus 828: goto parse_flag;
829:
830: case sPermitUserEnvironment:
831: intptr = &options->permit_user_env;
1.94 markus 832: goto parse_flag;
833:
834: case sUseLogin:
835: intptr = &options->use_login;
1.111 markus 836: goto parse_flag;
837:
838: case sCompression:
839: intptr = &options->compression;
1.143 markus 840: arg = strdelim(&cp);
841: if (!arg || *arg == '\0')
842: fatal("%s line %d: missing yes/no/delayed "
843: "argument.", filename, linenum);
844: value = 0; /* silence compiler */
845: if (strcmp(arg, "delayed") == 0)
846: value = COMP_DELAYED;
847: else if (strcmp(arg, "yes") == 0)
848: value = COMP_ZLIB;
849: else if (strcmp(arg, "no") == 0)
850: value = COMP_NONE;
851: else
852: fatal("%s line %d: Bad yes/no/delayed "
853: "argument: %s", filename, linenum, arg);
854: if (*intptr == -1)
855: *intptr = value;
856: break;
1.94 markus 857:
858: case sGatewayPorts:
859: intptr = &options->gateway_ports;
1.139 djm 860: arg = strdelim(&cp);
861: if (!arg || *arg == '\0')
862: fatal("%s line %d: missing yes/no/clientspecified "
863: "argument.", filename, linenum);
864: value = 0; /* silence compiler */
865: if (strcmp(arg, "clientspecified") == 0)
866: value = 2;
867: else if (strcmp(arg, "yes") == 0)
868: value = 1;
869: else if (strcmp(arg, "no") == 0)
870: value = 0;
871: else
872: fatal("%s line %d: Bad yes/no/clientspecified "
873: "argument: %s", filename, linenum, arg);
874: if (*intptr == -1)
875: *intptr = value;
876: break;
1.25 markus 877:
1.122 markus 878: case sUseDNS:
879: intptr = &options->use_dns;
1.94 markus 880: goto parse_flag;
1.53 markus 881:
1.94 markus 882: case sLogFacility:
883: intptr = (int *) &options->log_facility;
884: arg = strdelim(&cp);
885: value = log_facility_number(arg);
1.101 markus 886: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 887: fatal("%.200s line %d: unsupported log facility '%s'",
888: filename, linenum, arg ? arg : "<NONE>");
889: if (*intptr == -1)
890: *intptr = (SyslogFacility) value;
891: break;
1.25 markus 892:
1.94 markus 893: case sLogLevel:
894: intptr = (int *) &options->log_level;
895: arg = strdelim(&cp);
896: value = log_level_number(arg);
1.101 markus 897: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 898: fatal("%.200s line %d: unsupported log level '%s'",
899: filename, linenum, arg ? arg : "<NONE>");
900: if (*intptr == -1)
901: *intptr = (LogLevel) value;
902: break;
903:
904: case sAllowTcpForwarding:
905: intptr = &options->allow_tcp_forwarding;
906: goto parse_flag;
1.102 provos 907:
908: case sUsePrivilegeSeparation:
909: intptr = &use_privsep;
910: goto parse_flag;
1.94 markus 911:
912: case sAllowUsers:
913: while ((arg = strdelim(&cp)) && *arg != '\0') {
914: if (options->num_allow_users >= MAX_ALLOW_USERS)
915: fatal("%s line %d: too many allow users.",
916: filename, linenum);
1.112 deraadt 917: options->allow_users[options->num_allow_users++] =
918: xstrdup(arg);
1.94 markus 919: }
920: break;
1.25 markus 921:
1.94 markus 922: case sDenyUsers:
923: while ((arg = strdelim(&cp)) && *arg != '\0') {
924: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 stevesk 925: fatal("%s line %d: too many deny users.",
1.94 markus 926: filename, linenum);
1.112 deraadt 927: options->deny_users[options->num_deny_users++] =
928: xstrdup(arg);
1.94 markus 929: }
930: break;
1.25 markus 931:
1.94 markus 932: case sAllowGroups:
933: while ((arg = strdelim(&cp)) && *arg != '\0') {
934: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
935: fatal("%s line %d: too many allow groups.",
936: filename, linenum);
1.112 deraadt 937: options->allow_groups[options->num_allow_groups++] =
938: xstrdup(arg);
1.94 markus 939: }
940: break;
1.33 markus 941:
1.94 markus 942: case sDenyGroups:
943: while ((arg = strdelim(&cp)) && *arg != '\0') {
944: if (options->num_deny_groups >= MAX_DENY_GROUPS)
945: fatal("%s line %d: too many deny groups.",
946: filename, linenum);
947: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
948: }
949: break;
1.66 markus 950:
1.94 markus 951: case sCiphers:
952: arg = strdelim(&cp);
953: if (!arg || *arg == '\0')
954: fatal("%s line %d: Missing argument.", filename, linenum);
955: if (!ciphers_valid(arg))
956: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
957: filename, linenum, arg ? arg : "<NONE>");
958: if (options->ciphers == NULL)
959: options->ciphers = xstrdup(arg);
960: break;
1.33 markus 961:
1.94 markus 962: case sMacs:
963: arg = strdelim(&cp);
964: if (!arg || *arg == '\0')
965: fatal("%s line %d: Missing argument.", filename, linenum);
966: if (!mac_valid(arg))
967: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
968: filename, linenum, arg ? arg : "<NONE>");
969: if (options->macs == NULL)
970: options->macs = xstrdup(arg);
971: break;
1.43 jakob 972:
1.94 markus 973: case sProtocol:
974: intptr = &options->protocol;
975: arg = strdelim(&cp);
976: if (!arg || *arg == '\0')
977: fatal("%s line %d: Missing argument.", filename, linenum);
978: value = proto_spec(arg);
979: if (value == SSH_PROTO_UNKNOWN)
980: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 981: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 982: if (*intptr == SSH_PROTO_UNKNOWN)
983: *intptr = value;
984: break;
985:
986: case sSubsystem:
987: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
988: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 989: filename, linenum);
1.94 markus 990: }
991: arg = strdelim(&cp);
992: if (!arg || *arg == '\0')
993: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 994: filename, linenum);
1.153 dtucker 995: if (!*activep) {
996: arg = strdelim(&cp);
997: break;
998: }
1.94 markus 999: for (i = 0; i < options->num_subsystems; i++)
1000: if (strcmp(arg, options->subsystem_name[i]) == 0)
1001: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1002: filename, linenum, arg);
1.94 markus 1003: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1004: arg = strdelim(&cp);
1005: if (!arg || *arg == '\0')
1006: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1007: filename, linenum);
1.94 markus 1008: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1009:
1010: /* Collect arguments (separate to executable) */
1011: p = xstrdup(arg);
1012: len = strlen(p) + 1;
1013: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1014: len += 1 + strlen(arg);
1015: p = xrealloc(p, 1, len);
1016: strlcat(p, " ", len);
1017: strlcat(p, arg, len);
1018: }
1019: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1020: options->num_subsystems++;
1021: break;
1.46 markus 1022:
1.94 markus 1023: case sMaxStartups:
1024: arg = strdelim(&cp);
1025: if (!arg || *arg == '\0')
1026: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1027: filename, linenum);
1.94 markus 1028: if ((n = sscanf(arg, "%d:%d:%d",
1029: &options->max_startups_begin,
1030: &options->max_startups_rate,
1031: &options->max_startups)) == 3) {
1032: if (options->max_startups_begin >
1033: options->max_startups ||
1034: options->max_startups_rate > 100 ||
1035: options->max_startups_rate < 1)
1.50 markus 1036: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1037: filename, linenum);
1.94 markus 1038: } else if (n != 1)
1039: fatal("%s line %d: Illegal MaxStartups spec.",
1040: filename, linenum);
1041: else
1042: options->max_startups = options->max_startups_begin;
1043: break;
1.133 dtucker 1044:
1045: case sMaxAuthTries:
1046: intptr = &options->max_authtries;
1047: goto parse_int;
1.94 markus 1048:
1049: case sBanner:
1050: charptr = &options->banner;
1051: goto parse_filename;
1052: /*
1053: * These options can contain %X options expanded at
1054: * connect time, so that you can specify paths like:
1055: *
1056: * AuthorizedKeysFile /etc/ssh_keys/%u
1057: */
1058: case sAuthorizedKeysFile:
1059: case sAuthorizedKeysFile2:
1.163 stevesk 1060: charptr = (opcode == sAuthorizedKeysFile) ?
1.94 markus 1061: &options->authorized_keys_file :
1062: &options->authorized_keys_file2;
1063: goto parse_filename;
1064:
1065: case sClientAliveInterval:
1066: intptr = &options->client_alive_interval;
1067: goto parse_time;
1068:
1069: case sClientAliveCountMax:
1070: intptr = &options->client_alive_count_max;
1071: goto parse_int;
1.131 djm 1072:
1073: case sAcceptEnv:
1074: while ((arg = strdelim(&cp)) && *arg != '\0') {
1075: if (strchr(arg, '=') != NULL)
1076: fatal("%s line %d: Invalid environment name.",
1077: filename, linenum);
1078: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1079: fatal("%s line %d: too many allow env.",
1080: filename, linenum);
1.153 dtucker 1081: if (!*activep)
1082: break;
1.131 djm 1083: options->accept_env[options->num_accept_env++] =
1084: xstrdup(arg);
1085: }
1086: break;
1.145 reyk 1087:
1088: case sPermitTunnel:
1089: intptr = &options->permit_tun;
1.146 reyk 1090: arg = strdelim(&cp);
1091: if (!arg || *arg == '\0')
1092: fatal("%s line %d: Missing yes/point-to-point/"
1093: "ethernet/no argument.", filename, linenum);
1094: value = 0; /* silence compiler */
1095: if (strcasecmp(arg, "ethernet") == 0)
1096: value = SSH_TUNMODE_ETHERNET;
1097: else if (strcasecmp(arg, "point-to-point") == 0)
1098: value = SSH_TUNMODE_POINTOPOINT;
1099: else if (strcasecmp(arg, "yes") == 0)
1100: value = SSH_TUNMODE_YES;
1101: else if (strcasecmp(arg, "no") == 0)
1102: value = SSH_TUNMODE_NO;
1103: else
1104: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1105: "no argument: %s", filename, linenum, arg);
1106: if (*intptr == -1)
1107: *intptr = value;
1108: break;
1.94 markus 1109:
1.153 dtucker 1110: case sMatch:
1111: if (cmdline)
1112: fatal("Match directive not supported as a command-line "
1113: "option");
1114: value = match_cfg_line(&cp, linenum, user, host, address);
1115: if (value < 0)
1116: fatal("%s line %d: Bad Match condition", filename,
1117: linenum);
1118: *activep = value;
1.156 dtucker 1119: break;
1120:
1121: case sPermitOpen:
1122: arg = strdelim(&cp);
1123: if (!arg || *arg == '\0')
1124: fatal("%s line %d: missing PermitOpen specification",
1125: filename, linenum);
1126: if (strcmp(arg, "any") == 0) {
1.159 dtucker 1127: if (*activep) {
1.156 dtucker 1128: channel_clear_adm_permitted_opens();
1.159 dtucker 1129: options->num_permitted_opens = 0;
1130: }
1.156 dtucker 1131: break;
1132: }
1.159 dtucker 1133: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1134: p = hpdelim(&arg);
1135: if (p == NULL)
1136: fatal("%s line %d: missing host in PermitOpen",
1137: filename, linenum);
1138: p = cleanhostname(p);
1139: if (arg == NULL || (port = a2port(arg)) == 0)
1140: fatal("%s line %d: bad port number in "
1141: "PermitOpen", filename, linenum);
1142: if (*activep && options->num_permitted_opens == -1) {
1143: channel_clear_adm_permitted_opens();
1144: options->num_permitted_opens =
1145: channel_add_adm_permitted_opens(p, port);
1146: }
1147: }
1.153 dtucker 1148: break;
1149:
1.158 dtucker 1150: case sForceCommand:
1151: if (cp == NULL)
1152: fatal("%.200s line %d: Missing argument.", filename,
1153: linenum);
1154: len = strspn(cp, WHITESPACE);
1155: if (*activep && options->adm_forced_command == NULL)
1156: options->adm_forced_command = xstrdup(cp + len);
1157: return 0;
1158:
1.94 markus 1159: case sDeprecated:
1.117 itojun 1160: logit("%s line %d: Deprecated option %s",
1.121 jakob 1161: filename, linenum, arg);
1162: while (arg)
1163: arg = strdelim(&cp);
1164: break;
1165:
1166: case sUnsupported:
1167: logit("%s line %d: Unsupported option %s",
1.94 markus 1168: filename, linenum, arg);
1169: while (arg)
1170: arg = strdelim(&cp);
1171: break;
1172:
1173: default:
1174: fatal("%s line %d: Missing handler for opcode %s (%d)",
1175: filename, linenum, arg, opcode);
1176: }
1177: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1178: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1179: filename, linenum, arg);
1180: return 0;
1181: }
1182:
1183: /* Reads the server configuration file. */
1.25 markus 1184:
1.94 markus 1185: void
1.134 djm 1186: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1187: {
1.134 djm 1188: char line[1024], *cp;
1.94 markus 1189: FILE *f;
1.81 stevesk 1190:
1.134 djm 1191: debug2("%s: filename %s", __func__, filename);
1192: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1193: perror(filename);
1194: exit(1);
1195: }
1.134 djm 1196: buffer_clear(conf);
1197: while (fgets(line, sizeof(line), f)) {
1198: /*
1199: * Trim out comments and strip whitespace
1.135 deraadt 1200: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1201: * line numbers later for error messages
1202: */
1203: if ((cp = strchr(line, '#')) != NULL)
1204: memcpy(cp, "\n", 2);
1205: cp = line + strspn(line, " \t\r");
1206:
1207: buffer_append(conf, cp, strlen(cp));
1208: }
1209: buffer_append(conf, "\0", 1);
1210: fclose(f);
1211: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1212: }
1213:
1214: void
1.153 dtucker 1215: parse_server_match_config(ServerOptions *options, const char *user,
1216: const char *host, const char *address)
1217: {
1218: ServerOptions mo;
1219:
1220: initialize_server_options(&mo);
1221: parse_server_config(&mo, "reprocess config", &cfg, user, host, address);
1222: copy_set_server_options(options, &mo);
1223: }
1224:
1225: /* Copy any (supported) values that are set */
1226: void
1227: copy_set_server_options(ServerOptions *dst, ServerOptions *src)
1228: {
1229: if (src->allow_tcp_forwarding != -1)
1230: dst->allow_tcp_forwarding = src->allow_tcp_forwarding;
1231: if (src->gateway_ports != -1)
1232: dst->gateway_ports = src->gateway_ports;
1.158 dtucker 1233: if (src->adm_forced_command != NULL) {
1234: if (dst->adm_forced_command != NULL)
1235: xfree(dst->adm_forced_command);
1236: dst->adm_forced_command = src->adm_forced_command;
1237: }
1.157 dtucker 1238: if (src->x11_display_offset != -1)
1239: dst->x11_display_offset = src->x11_display_offset;
1240: if (src->x11_forwarding != -1)
1241: dst->x11_forwarding = src->x11_forwarding;
1242: if (src->x11_use_localhost != -1)
1243: dst->x11_use_localhost = src->x11_use_localhost;
1.153 dtucker 1244: }
1245:
1246: void
1247: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1248: const char *user, const char *host, const char *address)
1.134 djm 1249: {
1.153 dtucker 1250: int active, linenum, bad_options = 0;
1.136 dtucker 1251: char *cp, *obuf, *cbuf;
1.134 djm 1252:
1253: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1254:
1.136 dtucker 1255: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.153 dtucker 1256: active = user ? 0 : 1;
1.137 dtucker 1257: linenum = 1;
1.140 deraadt 1258: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1259: if (process_server_config_line(options, cp, filename,
1.153 dtucker 1260: linenum++, &active, user, host, address) != 0)
1.94 markus 1261: bad_options++;
1.1 deraadt 1262: }
1.136 dtucker 1263: xfree(obuf);
1.78 stevesk 1264: if (bad_options > 0)
1265: fatal("%s: terminating, %d bad configuration options",
1266: filename, bad_options);
1.1 deraadt 1267: }
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