Annotation of src/usr.bin/ssh/servconf.c, Revision 1.113
1.1 deraadt 1: /*
1.26 deraadt 2: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
3: * All rights reserved
1.34 markus 4: *
1.51 deraadt 5: * As far as I am concerned, the code I have written for this software
6: * can be used freely for any purpose. Any derived versions of this
7: * software must be clearly marked as such, and if the derived work is
8: * incompatible with the protocol description in the RFC file, it must be
9: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 10: */
1.1 deraadt 11:
12: #include "includes.h"
1.113 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.112 2002/06/23 09:46:51 deraadt Exp $");
1.62 markus 14:
1.88 itojun 15: #if defined(KRB4) || defined(KRB5)
1.62 markus 16: #include <krb.h>
1.86 dugsong 17: #endif
18: #ifdef AFS
19: #include <kafs.h>
1.62 markus 20: #endif
1.1 deraadt 21:
22: #include "ssh.h"
1.62 markus 23: #include "log.h"
1.1 deraadt 24: #include "servconf.h"
25: #include "xmalloc.h"
1.33 markus 26: #include "compat.h"
1.60 markus 27: #include "pathnames.h"
1.62 markus 28: #include "tildexpand.h"
29: #include "misc.h"
30: #include "cipher.h"
1.66 markus 31: #include "kex.h"
32: #include "mac.h"
1.1 deraadt 33:
1.84 itojun 34: static void add_listen_addr(ServerOptions *, char *, u_short);
35: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 36:
1.62 markus 37: /* AF_UNSPEC or AF_INET or AF_INET6 */
38: extern int IPv4or6;
1.102 provos 39: /* Use of privilege separation or not */
40: extern int use_privsep;
1.62 markus 41:
1.1 deraadt 42: /* Initializes the server options to their default values. */
43:
1.34 markus 44: void
1.25 markus 45: initialize_server_options(ServerOptions *options)
1.1 deraadt 46: {
1.25 markus 47: memset(options, 0, sizeof(*options));
1.29 markus 48: options->num_ports = 0;
49: options->ports_from_cmdline = 0;
50: options->listen_addrs = NULL;
1.54 markus 51: options->num_host_key_files = 0;
1.36 markus 52: options->pid_file = NULL;
1.25 markus 53: options->server_key_bits = -1;
54: options->login_grace_time = -1;
55: options->key_regeneration_time = -1;
1.67 markus 56: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 57: options->ignore_rhosts = -1;
58: options->ignore_user_known_hosts = -1;
59: options->print_motd = -1;
1.72 stevesk 60: options->print_lastlog = -1;
1.25 markus 61: options->x11_forwarding = -1;
62: options->x11_display_offset = -1;
1.99 stevesk 63: options->x11_use_localhost = -1;
1.42 markus 64: options->xauth_location = NULL;
1.25 markus 65: options->strict_modes = -1;
66: options->keepalives = -1;
1.101 markus 67: options->log_facility = SYSLOG_FACILITY_NOT_SET;
68: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 69: options->rhosts_authentication = -1;
70: options->rhosts_rsa_authentication = -1;
1.75 markus 71: options->hostbased_authentication = -1;
72: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 73: options->rsa_authentication = -1;
1.54 markus 74: options->pubkey_authentication = -1;
1.85 dugsong 75: #if defined(KRB4) || defined(KRB5)
1.25 markus 76: options->kerberos_authentication = -1;
77: options->kerberos_or_local_passwd = -1;
78: options->kerberos_ticket_cleanup = -1;
1.1 deraadt 79: #endif
1.85 dugsong 80: #if defined(AFS) || defined(KRB5)
81: options->kerberos_tgt_passing = -1;
82: #endif
1.4 dugsong 83: #ifdef AFS
1.25 markus 84: options->afs_token_passing = -1;
1.1 deraadt 85: #endif
1.25 markus 86: options->password_authentication = -1;
1.52 markus 87: options->kbd_interactive_authentication = -1;
1.80 markus 88: options->challenge_response_authentication = -1;
1.25 markus 89: options->permit_empty_passwd = -1;
1.113 ! markus 90: options->permit_user_env = -1;
1.25 markus 91: options->use_login = -1;
1.111 markus 92: options->compression = -1;
1.53 markus 93: options->allow_tcp_forwarding = -1;
1.25 markus 94: options->num_allow_users = 0;
95: options->num_deny_users = 0;
96: options->num_allow_groups = 0;
97: options->num_deny_groups = 0;
1.33 markus 98: options->ciphers = NULL;
1.66 markus 99: options->macs = NULL;
1.33 markus 100: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 101: options->gateway_ports = -1;
1.43 jakob 102: options->num_subsystems = 0;
1.50 markus 103: options->max_startups_begin = -1;
104: options->max_startups_rate = -1;
1.46 markus 105: options->max_startups = -1;
1.57 markus 106: options->banner = NULL;
1.100 markus 107: options->verify_reverse_mapping = -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;
1.102 provos 112:
113: /* Needs to be accessable in many places */
114: use_privsep = -1;
1.1 deraadt 115: }
116:
1.34 markus 117: void
1.25 markus 118: fill_default_server_options(ServerOptions *options)
1.1 deraadt 119: {
1.54 markus 120: if (options->protocol == SSH_PROTO_UNKNOWN)
121: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
122: if (options->num_host_key_files == 0) {
123: /* fill default hostkeys for protocols */
124: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 125: options->host_key_files[options->num_host_key_files++] =
126: _PATH_HOST_KEY_FILE;
127: if (options->protocol & SSH_PROTO_2) {
128: options->host_key_files[options->num_host_key_files++] =
129: _PATH_HOST_RSA_KEY_FILE;
130: options->host_key_files[options->num_host_key_files++] =
131: _PATH_HOST_DSA_KEY_FILE;
132: }
1.54 markus 133: }
1.29 markus 134: if (options->num_ports == 0)
135: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
136: if (options->listen_addrs == NULL)
1.76 stevesk 137: add_listen_addr(options, NULL, 0);
1.36 markus 138: if (options->pid_file == NULL)
1.60 markus 139: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 140: if (options->server_key_bits == -1)
141: options->server_key_bits = 768;
142: if (options->login_grace_time == -1)
143: options->login_grace_time = 600;
144: if (options->key_regeneration_time == -1)
145: options->key_regeneration_time = 3600;
1.67 markus 146: if (options->permit_root_login == PERMIT_NOT_SET)
147: options->permit_root_login = PERMIT_YES;
1.25 markus 148: if (options->ignore_rhosts == -1)
1.30 markus 149: options->ignore_rhosts = 1;
1.25 markus 150: if (options->ignore_user_known_hosts == -1)
151: options->ignore_user_known_hosts = 0;
152: if (options->print_motd == -1)
153: options->print_motd = 1;
1.72 stevesk 154: if (options->print_lastlog == -1)
155: options->print_lastlog = 1;
1.25 markus 156: if (options->x11_forwarding == -1)
1.30 markus 157: options->x11_forwarding = 0;
1.25 markus 158: if (options->x11_display_offset == -1)
1.30 markus 159: options->x11_display_offset = 10;
1.99 stevesk 160: if (options->x11_use_localhost == -1)
161: options->x11_use_localhost = 1;
1.42 markus 162: if (options->xauth_location == NULL)
1.83 markus 163: options->xauth_location = _PATH_XAUTH;
1.25 markus 164: if (options->strict_modes == -1)
165: options->strict_modes = 1;
166: if (options->keepalives == -1)
167: options->keepalives = 1;
1.101 markus 168: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 169: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 170: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 171: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 172: if (options->rhosts_authentication == -1)
173: options->rhosts_authentication = 0;
174: if (options->rhosts_rsa_authentication == -1)
1.30 markus 175: options->rhosts_rsa_authentication = 0;
1.75 markus 176: if (options->hostbased_authentication == -1)
177: options->hostbased_authentication = 0;
178: if (options->hostbased_uses_name_from_packet_only == -1)
179: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 180: if (options->rsa_authentication == -1)
181: options->rsa_authentication = 1;
1.54 markus 182: if (options->pubkey_authentication == -1)
183: options->pubkey_authentication = 1;
1.85 dugsong 184: #if defined(KRB4) || defined(KRB5)
1.25 markus 185: if (options->kerberos_authentication == -1)
1.107 markus 186: options->kerberos_authentication = 0;
1.25 markus 187: if (options->kerberos_or_local_passwd == -1)
188: options->kerberos_or_local_passwd = 1;
189: if (options->kerberos_ticket_cleanup == -1)
190: options->kerberos_ticket_cleanup = 1;
1.85 dugsong 191: #endif
192: #if defined(AFS) || defined(KRB5)
1.25 markus 193: if (options->kerberos_tgt_passing == -1)
194: options->kerberos_tgt_passing = 0;
1.85 dugsong 195: #endif
1.95 deraadt 196: #ifdef AFS
1.25 markus 197: if (options->afs_token_passing == -1)
1.106 deraadt 198: options->afs_token_passing = 0;
1.85 dugsong 199: #endif
1.25 markus 200: if (options->password_authentication == -1)
201: options->password_authentication = 1;
1.52 markus 202: if (options->kbd_interactive_authentication == -1)
203: options->kbd_interactive_authentication = 0;
1.80 markus 204: if (options->challenge_response_authentication == -1)
205: options->challenge_response_authentication = 1;
1.25 markus 206: if (options->permit_empty_passwd == -1)
1.30 markus 207: options->permit_empty_passwd = 0;
1.113 ! markus 208: if (options->permit_user_env == -1)
! 209: options->permit_user_env = 0;
1.25 markus 210: if (options->use_login == -1)
211: options->use_login = 0;
1.111 markus 212: if (options->compression == -1)
213: options->compression = 1;
1.53 markus 214: if (options->allow_tcp_forwarding == -1)
215: options->allow_tcp_forwarding = 1;
1.38 markus 216: if (options->gateway_ports == -1)
217: options->gateway_ports = 0;
1.46 markus 218: if (options->max_startups == -1)
219: options->max_startups = 10;
1.50 markus 220: if (options->max_startups_rate == -1)
221: options->max_startups_rate = 100; /* 100% */
222: if (options->max_startups_begin == -1)
223: options->max_startups_begin = options->max_startups;
1.100 markus 224: if (options->verify_reverse_mapping == -1)
225: options->verify_reverse_mapping = 0;
1.77 beck 226: if (options->client_alive_interval == -1)
1.95 deraadt 227: options->client_alive_interval = 0;
1.77 beck 228: if (options->client_alive_count_max == -1)
229: options->client_alive_count_max = 3;
1.90 markus 230: if (options->authorized_keys_file2 == NULL) {
231: /* authorized_keys_file2 falls back to authorized_keys_file */
232: if (options->authorized_keys_file != NULL)
233: options->authorized_keys_file2 = options->authorized_keys_file;
234: else
235: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
236: }
237: if (options->authorized_keys_file == NULL)
238: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.102 provos 239:
1.110 markus 240: /* Turn privilege separation on by default */
1.102 provos 241: if (use_privsep == -1)
1.110 markus 242: use_privsep = 1;
1.1 deraadt 243: }
244:
245: /* Keyword tokens. */
1.25 markus 246: typedef enum {
247: sBadOption, /* == unknown option */
248: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
249: sPermitRootLogin, sLogFacility, sLogLevel,
250: sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
1.85 dugsong 251: #if defined(KRB4) || defined(KRB5)
1.25 markus 252: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.1 deraadt 253: #endif
1.85 dugsong 254: #if defined(AFS) || defined(KRB5)
255: sKerberosTgtPassing,
256: #endif
1.1 deraadt 257: #ifdef AFS
1.85 dugsong 258: sAFSTokenPassing,
1.1 deraadt 259: #endif
1.63 markus 260: sChallengeResponseAuthentication,
1.52 markus 261: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 262: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 263: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.89 jakob 264: sStrictModes, sEmptyPasswd, sKeepAlives,
1.113 ! markus 265: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 266: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 267: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 268: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.100 markus 269: sBanner, sVerifyReverseMapping, sHostbasedAuthentication,
1.95 deraadt 270: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 271: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.105 stevesk 272: sUsePrivilegeSeparation,
1.89 jakob 273: sDeprecated
1.1 deraadt 274: } ServerOpCodes;
275:
276: /* Textual representation of the tokens. */
1.25 markus 277: static struct {
278: const char *name;
279: ServerOpCodes opcode;
280: } keywords[] = {
281: { "port", sPort },
282: { "hostkey", sHostKeyFile },
1.54 markus 283: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 284: { "pidfile", sPidFile },
1.25 markus 285: { "serverkeybits", sServerKeyBits },
286: { "logingracetime", sLoginGraceTime },
287: { "keyregenerationinterval", sKeyRegenerationTime },
288: { "permitrootlogin", sPermitRootLogin },
289: { "syslogfacility", sLogFacility },
290: { "loglevel", sLogLevel },
291: { "rhostsauthentication", sRhostsAuthentication },
292: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 293: { "hostbasedauthentication", sHostbasedAuthentication },
294: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 295: { "rsaauthentication", sRSAAuthentication },
1.54 markus 296: { "pubkeyauthentication", sPubkeyAuthentication },
297: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.85 dugsong 298: #if defined(KRB4) || defined(KRB5)
1.25 markus 299: { "kerberosauthentication", sKerberosAuthentication },
300: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
301: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.1 deraadt 302: #endif
1.85 dugsong 303: #if defined(AFS) || defined(KRB5)
304: { "kerberostgtpassing", sKerberosTgtPassing },
305: #endif
1.4 dugsong 306: #ifdef AFS
1.25 markus 307: { "afstokenpassing", sAFSTokenPassing },
1.1 deraadt 308: #endif
1.25 markus 309: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 310: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 311: { "challengeresponseauthentication", sChallengeResponseAuthentication },
312: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 313: { "checkmail", sDeprecated },
1.25 markus 314: { "listenaddress", sListenAddress },
315: { "printmotd", sPrintMotd },
1.72 stevesk 316: { "printlastlog", sPrintLastLog },
1.25 markus 317: { "ignorerhosts", sIgnoreRhosts },
318: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
319: { "x11forwarding", sX11Forwarding },
320: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 321: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 322: { "xauthlocation", sXAuthLocation },
1.25 markus 323: { "strictmodes", sStrictModes },
324: { "permitemptypasswords", sEmptyPasswd },
1.113 ! markus 325: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 326: { "uselogin", sUseLogin },
1.111 markus 327: { "compression", sCompression },
1.25 markus 328: { "keepalive", sKeepAlives },
1.53 markus 329: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 330: { "allowusers", sAllowUsers },
331: { "denyusers", sDenyUsers },
332: { "allowgroups", sAllowGroups },
333: { "denygroups", sDenyGroups },
1.33 markus 334: { "ciphers", sCiphers },
1.66 markus 335: { "macs", sMacs },
1.33 markus 336: { "protocol", sProtocol },
1.38 markus 337: { "gatewayports", sGatewayPorts },
1.43 jakob 338: { "subsystem", sSubsystem },
1.46 markus 339: { "maxstartups", sMaxStartups },
1.57 markus 340: { "banner", sBanner },
1.100 markus 341: { "verifyreversemapping", sVerifyReverseMapping },
342: { "reversemappingcheck", sVerifyReverseMapping },
1.77 beck 343: { "clientaliveinterval", sClientAliveInterval },
344: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 345: { "authorizedkeysfile", sAuthorizedKeysFile },
346: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 347: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.92 stevesk 348: { NULL, sBadOption }
1.1 deraadt 349: };
350:
1.27 markus 351: /*
1.73 stevesk 352: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 353: */
1.1 deraadt 354:
1.34 markus 355: static ServerOpCodes
1.25 markus 356: parse_token(const char *cp, const char *filename,
357: int linenum)
1.1 deraadt 358: {
1.55 markus 359: u_int i;
1.1 deraadt 360:
1.25 markus 361: for (i = 0; keywords[i].name; i++)
1.28 markus 362: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 363: return keywords[i].opcode;
364:
1.78 stevesk 365: error("%s: line %d: Bad configuration option: %s",
366: filename, linenum, cp);
1.25 markus 367: return sBadOption;
1.1 deraadt 368: }
369:
1.84 itojun 370: static void
1.76 stevesk 371: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 372: {
373: int i;
374:
375: if (options->num_ports == 0)
376: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 377: if (port == 0)
1.74 stevesk 378: for (i = 0; i < options->num_ports; i++)
379: add_one_listen_addr(options, addr, options->ports[i]);
380: else
1.76 stevesk 381: add_one_listen_addr(options, addr, port);
1.74 stevesk 382: }
383:
1.84 itojun 384: static void
1.74 stevesk 385: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 386: {
387: struct addrinfo hints, *ai, *aitop;
388: char strport[NI_MAXSERV];
389: int gaierr;
390:
1.74 stevesk 391: memset(&hints, 0, sizeof(hints));
392: hints.ai_family = IPv4or6;
393: hints.ai_socktype = SOCK_STREAM;
394: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 395: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 396: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
397: fatal("bad addr or host: %s (%s)",
398: addr ? addr : "<NULL>",
399: gai_strerror(gaierr));
400: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
401: ;
402: ai->ai_next = options->listen_addrs;
403: options->listen_addrs = aitop;
1.29 markus 404: }
405:
1.94 markus 406: int
407: process_server_config_line(ServerOptions *options, char *line,
408: const char *filename, int linenum)
1.1 deraadt 409: {
1.74 stevesk 410: char *cp, **charptr, *arg, *p;
1.112 deraadt 411: int *intptr, value, i, n;
1.25 markus 412: ServerOpCodes opcode;
413:
1.94 markus 414: cp = line;
415: arg = strdelim(&cp);
416: /* Ignore leading whitespace */
417: if (*arg == '\0')
418: arg = strdelim(&cp);
419: if (!arg || !*arg || *arg == '#')
420: return 0;
421: intptr = NULL;
422: charptr = NULL;
423: opcode = parse_token(arg, filename, linenum);
424: switch (opcode) {
425: case sBadOption:
426: return -1;
427: case sPort:
428: /* ignore ports from configfile if cmdline specifies ports */
429: if (options->ports_from_cmdline)
430: return 0;
431: if (options->listen_addrs != NULL)
432: fatal("%s line %d: ports must be specified before "
1.98 stevesk 433: "ListenAddress.", filename, linenum);
1.94 markus 434: if (options->num_ports >= MAX_PORTS)
435: fatal("%s line %d: too many ports.",
436: filename, linenum);
1.48 provos 437: arg = strdelim(&cp);
1.94 markus 438: if (!arg || *arg == '\0')
439: fatal("%s line %d: missing port number.",
440: filename, linenum);
441: options->ports[options->num_ports++] = a2port(arg);
442: if (options->ports[options->num_ports-1] == 0)
443: fatal("%s line %d: Badly formatted port number.",
444: filename, linenum);
445: break;
1.29 markus 446:
1.94 markus 447: case sServerKeyBits:
448: intptr = &options->server_key_bits;
1.25 markus 449: parse_int:
1.94 markus 450: arg = strdelim(&cp);
451: if (!arg || *arg == '\0')
452: fatal("%s line %d: missing integer value.",
453: filename, linenum);
454: value = atoi(arg);
455: if (*intptr == -1)
456: *intptr = value;
457: break;
1.25 markus 458:
1.94 markus 459: case sLoginGraceTime:
460: intptr = &options->login_grace_time;
1.81 stevesk 461: parse_time:
1.94 markus 462: arg = strdelim(&cp);
463: if (!arg || *arg == '\0')
464: fatal("%s line %d: missing time value.",
465: filename, linenum);
466: if ((value = convtime(arg)) == -1)
467: fatal("%s line %d: invalid time value.",
468: filename, linenum);
469: if (*intptr == -1)
470: *intptr = value;
471: break;
472:
473: case sKeyRegenerationTime:
474: intptr = &options->key_regeneration_time;
475: goto parse_time;
476:
477: case sListenAddress:
478: arg = strdelim(&cp);
479: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
480: fatal("%s line %d: missing inet addr.",
481: filename, linenum);
482: if (*arg == '[') {
483: if ((p = strchr(arg, ']')) == NULL)
484: fatal("%s line %d: bad ipv6 inet addr usage.",
485: filename, linenum);
486: arg++;
487: memmove(p, p+1, strlen(p+1)+1);
488: } else if (((p = strchr(arg, ':')) == NULL) ||
489: (strchr(p+1, ':') != NULL)) {
490: add_listen_addr(options, arg, 0);
1.81 stevesk 491: break;
1.94 markus 492: }
493: if (*p == ':') {
494: u_short port;
1.25 markus 495:
1.94 markus 496: p++;
497: if (*p == '\0')
498: fatal("%s line %d: bad inet addr:port usage.",
499: filename, linenum);
500: else {
501: *(p-1) = '\0';
502: if ((port = a2port(p)) == 0)
503: fatal("%s line %d: bad port number.",
1.74 stevesk 504: filename, linenum);
1.94 markus 505: add_listen_addr(options, arg, port);
1.74 stevesk 506: }
1.94 markus 507: } else if (*p == '\0')
508: add_listen_addr(options, arg, 0);
509: else
510: fatal("%s line %d: bad inet addr usage.",
511: filename, linenum);
512: break;
513:
514: case sHostKeyFile:
515: intptr = &options->num_host_key_files;
516: if (*intptr >= MAX_HOSTKEYS)
517: fatal("%s line %d: too many host keys specified (max %d).",
518: filename, linenum, MAX_HOSTKEYS);
519: charptr = &options->host_key_files[*intptr];
520: parse_filename:
521: arg = strdelim(&cp);
522: if (!arg || *arg == '\0')
523: fatal("%s line %d: missing file name.",
524: filename, linenum);
525: if (*charptr == NULL) {
526: *charptr = tilde_expand_filename(arg, getuid());
527: /* increase optional counter */
528: if (intptr != NULL)
529: *intptr = *intptr + 1;
530: }
531: break;
1.76 stevesk 532:
1.94 markus 533: case sPidFile:
534: charptr = &options->pid_file;
535: goto parse_filename;
1.25 markus 536:
1.94 markus 537: case sPermitRootLogin:
538: intptr = &options->permit_root_login;
539: arg = strdelim(&cp);
540: if (!arg || *arg == '\0')
541: fatal("%s line %d: missing yes/"
542: "without-password/forced-commands-only/no "
543: "argument.", filename, linenum);
544: value = 0; /* silence compiler */
545: if (strcmp(arg, "without-password") == 0)
546: value = PERMIT_NO_PASSWD;
547: else if (strcmp(arg, "forced-commands-only") == 0)
548: value = PERMIT_FORCED_ONLY;
549: else if (strcmp(arg, "yes") == 0)
550: value = PERMIT_YES;
551: else if (strcmp(arg, "no") == 0)
552: value = PERMIT_NO;
553: else
554: fatal("%s line %d: Bad yes/"
555: "without-password/forced-commands-only/no "
556: "argument: %s", filename, linenum, arg);
557: if (*intptr == -1)
558: *intptr = value;
559: break;
1.36 markus 560:
1.94 markus 561: case sIgnoreRhosts:
562: intptr = &options->ignore_rhosts;
1.25 markus 563: parse_flag:
1.94 markus 564: arg = strdelim(&cp);
565: if (!arg || *arg == '\0')
566: fatal("%s line %d: missing yes/no argument.",
567: filename, linenum);
568: value = 0; /* silence compiler */
569: if (strcmp(arg, "yes") == 0)
570: value = 1;
571: else if (strcmp(arg, "no") == 0)
572: value = 0;
573: else
574: fatal("%s line %d: Bad yes/no argument: %s",
575: filename, linenum, arg);
576: if (*intptr == -1)
577: *intptr = value;
578: break;
579:
580: case sIgnoreUserKnownHosts:
581: intptr = &options->ignore_user_known_hosts;
582: goto parse_flag;
583:
584: case sRhostsAuthentication:
585: intptr = &options->rhosts_authentication;
586: goto parse_flag;
587:
588: case sRhostsRSAAuthentication:
589: intptr = &options->rhosts_rsa_authentication;
590: goto parse_flag;
591:
592: case sHostbasedAuthentication:
593: intptr = &options->hostbased_authentication;
594: goto parse_flag;
595:
596: case sHostbasedUsesNameFromPacketOnly:
597: intptr = &options->hostbased_uses_name_from_packet_only;
598: goto parse_flag;
599:
600: case sRSAAuthentication:
601: intptr = &options->rsa_authentication;
602: goto parse_flag;
603:
604: case sPubkeyAuthentication:
605: intptr = &options->pubkey_authentication;
606: goto parse_flag;
1.85 dugsong 607: #if defined(KRB4) || defined(KRB5)
1.94 markus 608: case sKerberosAuthentication:
609: intptr = &options->kerberos_authentication;
610: goto parse_flag;
611:
612: case sKerberosOrLocalPasswd:
613: intptr = &options->kerberos_or_local_passwd;
614: goto parse_flag;
615:
616: case sKerberosTicketCleanup:
617: intptr = &options->kerberos_ticket_cleanup;
618: goto parse_flag;
1.1 deraadt 619: #endif
1.85 dugsong 620: #if defined(AFS) || defined(KRB5)
1.94 markus 621: case sKerberosTgtPassing:
622: intptr = &options->kerberos_tgt_passing;
623: goto parse_flag;
1.85 dugsong 624: #endif
625: #ifdef AFS
1.94 markus 626: case sAFSTokenPassing:
627: intptr = &options->afs_token_passing;
628: goto parse_flag;
629: #endif
630:
631: case sPasswordAuthentication:
632: intptr = &options->password_authentication;
633: goto parse_flag;
634:
635: case sKbdInteractiveAuthentication:
636: intptr = &options->kbd_interactive_authentication;
637: goto parse_flag;
638:
639: case sChallengeResponseAuthentication:
640: intptr = &options->challenge_response_authentication;
641: goto parse_flag;
642:
643: case sPrintMotd:
644: intptr = &options->print_motd;
645: goto parse_flag;
646:
647: case sPrintLastLog:
648: intptr = &options->print_lastlog;
649: goto parse_flag;
650:
651: case sX11Forwarding:
652: intptr = &options->x11_forwarding;
653: goto parse_flag;
654:
655: case sX11DisplayOffset:
656: intptr = &options->x11_display_offset;
657: goto parse_int;
1.99 stevesk 658:
659: case sX11UseLocalhost:
660: intptr = &options->x11_use_localhost;
661: goto parse_flag;
1.94 markus 662:
663: case sXAuthLocation:
664: charptr = &options->xauth_location;
665: goto parse_filename;
666:
667: case sStrictModes:
668: intptr = &options->strict_modes;
669: goto parse_flag;
670:
671: case sKeepAlives:
672: intptr = &options->keepalives;
673: goto parse_flag;
674:
675: case sEmptyPasswd:
676: intptr = &options->permit_empty_passwd;
1.113 ! markus 677: goto parse_flag;
! 678:
! 679: case sPermitUserEnvironment:
! 680: intptr = &options->permit_user_env;
1.94 markus 681: goto parse_flag;
682:
683: case sUseLogin:
684: intptr = &options->use_login;
1.111 markus 685: goto parse_flag;
686:
687: case sCompression:
688: intptr = &options->compression;
1.94 markus 689: goto parse_flag;
690:
691: case sGatewayPorts:
692: intptr = &options->gateway_ports;
693: goto parse_flag;
1.25 markus 694:
1.100 markus 695: case sVerifyReverseMapping:
696: intptr = &options->verify_reverse_mapping;
1.94 markus 697: goto parse_flag;
1.53 markus 698:
1.94 markus 699: case sLogFacility:
700: intptr = (int *) &options->log_facility;
701: arg = strdelim(&cp);
702: value = log_facility_number(arg);
1.101 markus 703: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 704: fatal("%.200s line %d: unsupported log facility '%s'",
705: filename, linenum, arg ? arg : "<NONE>");
706: if (*intptr == -1)
707: *intptr = (SyslogFacility) value;
708: break;
1.25 markus 709:
1.94 markus 710: case sLogLevel:
711: intptr = (int *) &options->log_level;
712: arg = strdelim(&cp);
713: value = log_level_number(arg);
1.101 markus 714: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 715: fatal("%.200s line %d: unsupported log level '%s'",
716: filename, linenum, arg ? arg : "<NONE>");
717: if (*intptr == -1)
718: *intptr = (LogLevel) value;
719: break;
720:
721: case sAllowTcpForwarding:
722: intptr = &options->allow_tcp_forwarding;
723: goto parse_flag;
1.102 provos 724:
725: case sUsePrivilegeSeparation:
726: intptr = &use_privsep;
727: goto parse_flag;
1.94 markus 728:
729: case sAllowUsers:
730: while ((arg = strdelim(&cp)) && *arg != '\0') {
731: if (options->num_allow_users >= MAX_ALLOW_USERS)
732: fatal("%s line %d: too many allow users.",
733: filename, linenum);
1.112 deraadt 734: options->allow_users[options->num_allow_users++] =
735: xstrdup(arg);
1.94 markus 736: }
737: break;
1.25 markus 738:
1.94 markus 739: case sDenyUsers:
740: while ((arg = strdelim(&cp)) && *arg != '\0') {
741: if (options->num_deny_users >= MAX_DENY_USERS)
742: fatal( "%s line %d: too many deny users.",
743: filename, linenum);
1.112 deraadt 744: options->deny_users[options->num_deny_users++] =
745: xstrdup(arg);
1.94 markus 746: }
747: break;
1.25 markus 748:
1.94 markus 749: case sAllowGroups:
750: while ((arg = strdelim(&cp)) && *arg != '\0') {
751: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
752: fatal("%s line %d: too many allow groups.",
753: filename, linenum);
1.112 deraadt 754: options->allow_groups[options->num_allow_groups++] =
755: xstrdup(arg);
1.94 markus 756: }
757: break;
1.33 markus 758:
1.94 markus 759: case sDenyGroups:
760: while ((arg = strdelim(&cp)) && *arg != '\0') {
761: if (options->num_deny_groups >= MAX_DENY_GROUPS)
762: fatal("%s line %d: too many deny groups.",
763: filename, linenum);
764: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
765: }
766: break;
1.66 markus 767:
1.94 markus 768: case sCiphers:
769: arg = strdelim(&cp);
770: if (!arg || *arg == '\0')
771: fatal("%s line %d: Missing argument.", filename, linenum);
772: if (!ciphers_valid(arg))
773: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
774: filename, linenum, arg ? arg : "<NONE>");
775: if (options->ciphers == NULL)
776: options->ciphers = xstrdup(arg);
777: break;
1.33 markus 778:
1.94 markus 779: case sMacs:
780: arg = strdelim(&cp);
781: if (!arg || *arg == '\0')
782: fatal("%s line %d: Missing argument.", filename, linenum);
783: if (!mac_valid(arg))
784: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
785: filename, linenum, arg ? arg : "<NONE>");
786: if (options->macs == NULL)
787: options->macs = xstrdup(arg);
788: break;
1.43 jakob 789:
1.94 markus 790: case sProtocol:
791: intptr = &options->protocol;
792: arg = strdelim(&cp);
793: if (!arg || *arg == '\0')
794: fatal("%s line %d: Missing argument.", filename, linenum);
795: value = proto_spec(arg);
796: if (value == SSH_PROTO_UNKNOWN)
797: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 798: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 799: if (*intptr == SSH_PROTO_UNKNOWN)
800: *intptr = value;
801: break;
802:
803: case sSubsystem:
804: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
805: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 806: filename, linenum);
1.94 markus 807: }
808: arg = strdelim(&cp);
809: if (!arg || *arg == '\0')
810: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 811: filename, linenum);
1.94 markus 812: for (i = 0; i < options->num_subsystems; i++)
813: if (strcmp(arg, options->subsystem_name[i]) == 0)
814: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 815: filename, linenum, arg);
1.94 markus 816: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
817: arg = strdelim(&cp);
818: if (!arg || *arg == '\0')
819: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 820: filename, linenum);
1.94 markus 821: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
822: options->num_subsystems++;
823: break;
1.46 markus 824:
1.94 markus 825: case sMaxStartups:
826: arg = strdelim(&cp);
827: if (!arg || *arg == '\0')
828: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 829: filename, linenum);
1.94 markus 830: if ((n = sscanf(arg, "%d:%d:%d",
831: &options->max_startups_begin,
832: &options->max_startups_rate,
833: &options->max_startups)) == 3) {
834: if (options->max_startups_begin >
835: options->max_startups ||
836: options->max_startups_rate > 100 ||
837: options->max_startups_rate < 1)
1.50 markus 838: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 839: filename, linenum);
1.94 markus 840: } else if (n != 1)
841: fatal("%s line %d: Illegal MaxStartups spec.",
842: filename, linenum);
843: else
844: options->max_startups = options->max_startups_begin;
845: break;
846:
847: case sBanner:
848: charptr = &options->banner;
849: goto parse_filename;
850: /*
851: * These options can contain %X options expanded at
852: * connect time, so that you can specify paths like:
853: *
854: * AuthorizedKeysFile /etc/ssh_keys/%u
855: */
856: case sAuthorizedKeysFile:
857: case sAuthorizedKeysFile2:
858: charptr = (opcode == sAuthorizedKeysFile ) ?
859: &options->authorized_keys_file :
860: &options->authorized_keys_file2;
861: goto parse_filename;
862:
863: case sClientAliveInterval:
864: intptr = &options->client_alive_interval;
865: goto parse_time;
866:
867: case sClientAliveCountMax:
868: intptr = &options->client_alive_count_max;
869: goto parse_int;
870:
871: case sDeprecated:
872: log("%s line %d: Deprecated option %s",
873: filename, linenum, arg);
874: while (arg)
875: arg = strdelim(&cp);
876: break;
877:
878: default:
879: fatal("%s line %d: Missing handler for opcode %s (%d)",
880: filename, linenum, arg, opcode);
881: }
882: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
883: fatal("%s line %d: garbage at end of line; \"%.200s\".",
884: filename, linenum, arg);
885: return 0;
886: }
887:
888: /* Reads the server configuration file. */
1.25 markus 889:
1.94 markus 890: void
891: read_server_config(ServerOptions *options, const char *filename)
892: {
1.112 deraadt 893: int linenum, bad_options = 0;
894: char line[1024];
1.94 markus 895: FILE *f;
1.81 stevesk 896:
1.94 markus 897: f = fopen(filename, "r");
898: if (!f) {
899: perror(filename);
900: exit(1);
901: }
902: linenum = 0;
903: while (fgets(line, sizeof(line), f)) {
904: /* Update line number counter. */
905: linenum++;
906: if (process_server_config_line(options, line, filename, linenum) != 0)
907: bad_options++;
1.1 deraadt 908: }
1.25 markus 909: fclose(f);
1.78 stevesk 910: if (bad_options > 0)
911: fatal("%s: terminating, %d bad configuration options",
912: filename, bad_options);
1.1 deraadt 913: }
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