Annotation of src/usr.bin/ssh/servconf.c, Revision 1.119
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"
1.119 ! jakob 13: RCSID("$OpenBSD: servconf.c,v 1.118 2003/04/09 08:23:52 hin Exp $");
1.62 markus 14:
1.118 hin 15: #if defined(KRB4)
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;
1.25 markus 75: options->kerberos_authentication = -1;
76: options->kerberos_or_local_passwd = -1;
77: options->kerberos_ticket_cleanup = -1;
1.85 dugsong 78: options->kerberos_tgt_passing = -1;
1.25 markus 79: options->afs_token_passing = -1;
80: options->password_authentication = -1;
1.52 markus 81: options->kbd_interactive_authentication = -1;
1.80 markus 82: options->challenge_response_authentication = -1;
1.25 markus 83: options->permit_empty_passwd = -1;
1.113 markus 84: options->permit_user_env = -1;
1.25 markus 85: options->use_login = -1;
1.111 markus 86: options->compression = -1;
1.53 markus 87: options->allow_tcp_forwarding = -1;
1.25 markus 88: options->num_allow_users = 0;
89: options->num_deny_users = 0;
90: options->num_allow_groups = 0;
91: options->num_deny_groups = 0;
1.33 markus 92: options->ciphers = NULL;
1.66 markus 93: options->macs = NULL;
1.33 markus 94: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 95: options->gateway_ports = -1;
1.43 jakob 96: options->num_subsystems = 0;
1.50 markus 97: options->max_startups_begin = -1;
98: options->max_startups_rate = -1;
1.46 markus 99: options->max_startups = -1;
1.57 markus 100: options->banner = NULL;
1.100 markus 101: options->verify_reverse_mapping = -1;
1.77 beck 102: options->client_alive_interval = -1;
103: options->client_alive_count_max = -1;
1.82 markus 104: options->authorized_keys_file = NULL;
105: options->authorized_keys_file2 = NULL;
1.102 provos 106:
107: /* Needs to be accessable in many places */
108: use_privsep = -1;
1.1 deraadt 109: }
110:
1.34 markus 111: void
1.25 markus 112: fill_default_server_options(ServerOptions *options)
1.1 deraadt 113: {
1.54 markus 114: if (options->protocol == SSH_PROTO_UNKNOWN)
115: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
116: if (options->num_host_key_files == 0) {
117: /* fill default hostkeys for protocols */
118: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 119: options->host_key_files[options->num_host_key_files++] =
120: _PATH_HOST_KEY_FILE;
121: if (options->protocol & SSH_PROTO_2) {
122: options->host_key_files[options->num_host_key_files++] =
123: _PATH_HOST_RSA_KEY_FILE;
124: options->host_key_files[options->num_host_key_files++] =
125: _PATH_HOST_DSA_KEY_FILE;
126: }
1.54 markus 127: }
1.29 markus 128: if (options->num_ports == 0)
129: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
130: if (options->listen_addrs == NULL)
1.76 stevesk 131: add_listen_addr(options, NULL, 0);
1.36 markus 132: if (options->pid_file == NULL)
1.60 markus 133: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 134: if (options->server_key_bits == -1)
135: options->server_key_bits = 768;
136: if (options->login_grace_time == -1)
1.115 stevesk 137: options->login_grace_time = 120;
1.25 markus 138: if (options->key_regeneration_time == -1)
139: options->key_regeneration_time = 3600;
1.67 markus 140: if (options->permit_root_login == PERMIT_NOT_SET)
141: options->permit_root_login = PERMIT_YES;
1.25 markus 142: if (options->ignore_rhosts == -1)
1.30 markus 143: options->ignore_rhosts = 1;
1.25 markus 144: if (options->ignore_user_known_hosts == -1)
145: options->ignore_user_known_hosts = 0;
146: if (options->print_motd == -1)
147: options->print_motd = 1;
1.72 stevesk 148: if (options->print_lastlog == -1)
149: options->print_lastlog = 1;
1.25 markus 150: if (options->x11_forwarding == -1)
1.30 markus 151: options->x11_forwarding = 0;
1.25 markus 152: if (options->x11_display_offset == -1)
1.30 markus 153: options->x11_display_offset = 10;
1.99 stevesk 154: if (options->x11_use_localhost == -1)
155: options->x11_use_localhost = 1;
1.42 markus 156: if (options->xauth_location == NULL)
1.83 markus 157: options->xauth_location = _PATH_XAUTH;
1.25 markus 158: if (options->strict_modes == -1)
159: options->strict_modes = 1;
160: if (options->keepalives == -1)
161: options->keepalives = 1;
1.101 markus 162: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 163: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 164: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 165: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 166: if (options->rhosts_authentication == -1)
167: options->rhosts_authentication = 0;
168: if (options->rhosts_rsa_authentication == -1)
1.30 markus 169: options->rhosts_rsa_authentication = 0;
1.75 markus 170: if (options->hostbased_authentication == -1)
171: options->hostbased_authentication = 0;
172: if (options->hostbased_uses_name_from_packet_only == -1)
173: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 174: if (options->rsa_authentication == -1)
175: options->rsa_authentication = 1;
1.54 markus 176: if (options->pubkey_authentication == -1)
177: options->pubkey_authentication = 1;
1.25 markus 178: if (options->kerberos_authentication == -1)
1.107 markus 179: options->kerberos_authentication = 0;
1.25 markus 180: if (options->kerberos_or_local_passwd == -1)
181: options->kerberos_or_local_passwd = 1;
182: if (options->kerberos_ticket_cleanup == -1)
183: options->kerberos_ticket_cleanup = 1;
184: if (options->kerberos_tgt_passing == -1)
185: options->kerberos_tgt_passing = 0;
186: if (options->afs_token_passing == -1)
1.106 deraadt 187: options->afs_token_passing = 0;
1.25 markus 188: if (options->password_authentication == -1)
189: options->password_authentication = 1;
1.52 markus 190: if (options->kbd_interactive_authentication == -1)
191: options->kbd_interactive_authentication = 0;
1.80 markus 192: if (options->challenge_response_authentication == -1)
193: options->challenge_response_authentication = 1;
1.25 markus 194: if (options->permit_empty_passwd == -1)
1.30 markus 195: options->permit_empty_passwd = 0;
1.113 markus 196: if (options->permit_user_env == -1)
197: options->permit_user_env = 0;
1.25 markus 198: if (options->use_login == -1)
199: options->use_login = 0;
1.111 markus 200: if (options->compression == -1)
201: options->compression = 1;
1.53 markus 202: if (options->allow_tcp_forwarding == -1)
203: options->allow_tcp_forwarding = 1;
1.38 markus 204: if (options->gateway_ports == -1)
205: options->gateway_ports = 0;
1.46 markus 206: if (options->max_startups == -1)
207: options->max_startups = 10;
1.50 markus 208: if (options->max_startups_rate == -1)
209: options->max_startups_rate = 100; /* 100% */
210: if (options->max_startups_begin == -1)
211: options->max_startups_begin = options->max_startups;
1.100 markus 212: if (options->verify_reverse_mapping == -1)
213: options->verify_reverse_mapping = 0;
1.77 beck 214: if (options->client_alive_interval == -1)
1.95 deraadt 215: options->client_alive_interval = 0;
1.77 beck 216: if (options->client_alive_count_max == -1)
217: options->client_alive_count_max = 3;
1.90 markus 218: if (options->authorized_keys_file2 == NULL) {
219: /* authorized_keys_file2 falls back to authorized_keys_file */
220: if (options->authorized_keys_file != NULL)
221: options->authorized_keys_file2 = options->authorized_keys_file;
222: else
223: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
224: }
225: if (options->authorized_keys_file == NULL)
226: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.102 provos 227:
1.110 markus 228: /* Turn privilege separation on by default */
1.102 provos 229: if (use_privsep == -1)
1.110 markus 230: use_privsep = 1;
1.1 deraadt 231: }
232:
233: /* Keyword tokens. */
1.25 markus 234: typedef enum {
235: sBadOption, /* == unknown option */
236: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
237: sPermitRootLogin, sLogFacility, sLogLevel,
238: sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
239: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.119 ! jakob 240: sKerberosTgtPassing, sAFSTokenPassing, sChallengeResponseAuthentication,
1.52 markus 241: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 242: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 243: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.89 jakob 244: sStrictModes, sEmptyPasswd, sKeepAlives,
1.113 markus 245: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 246: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 247: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 248: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.100 markus 249: sBanner, sVerifyReverseMapping, sHostbasedAuthentication,
1.95 deraadt 250: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 251: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.105 stevesk 252: sUsePrivilegeSeparation,
1.89 jakob 253: sDeprecated
1.1 deraadt 254: } ServerOpCodes;
255:
256: /* Textual representation of the tokens. */
1.25 markus 257: static struct {
258: const char *name;
259: ServerOpCodes opcode;
260: } keywords[] = {
261: { "port", sPort },
262: { "hostkey", sHostKeyFile },
1.54 markus 263: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 264: { "pidfile", sPidFile },
1.25 markus 265: { "serverkeybits", sServerKeyBits },
266: { "logingracetime", sLoginGraceTime },
267: { "keyregenerationinterval", sKeyRegenerationTime },
268: { "permitrootlogin", sPermitRootLogin },
269: { "syslogfacility", sLogFacility },
270: { "loglevel", sLogLevel },
271: { "rhostsauthentication", sRhostsAuthentication },
272: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 273: { "hostbasedauthentication", sHostbasedAuthentication },
274: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 275: { "rsaauthentication", sRSAAuthentication },
1.54 markus 276: { "pubkeyauthentication", sPubkeyAuthentication },
277: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.25 markus 278: { "kerberosauthentication", sKerberosAuthentication },
279: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
280: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.85 dugsong 281: { "kerberostgtpassing", sKerberosTgtPassing },
1.25 markus 282: { "afstokenpassing", sAFSTokenPassing },
283: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 284: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 285: { "challengeresponseauthentication", sChallengeResponseAuthentication },
286: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 287: { "checkmail", sDeprecated },
1.25 markus 288: { "listenaddress", sListenAddress },
289: { "printmotd", sPrintMotd },
1.72 stevesk 290: { "printlastlog", sPrintLastLog },
1.25 markus 291: { "ignorerhosts", sIgnoreRhosts },
292: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
293: { "x11forwarding", sX11Forwarding },
294: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 295: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 296: { "xauthlocation", sXAuthLocation },
1.25 markus 297: { "strictmodes", sStrictModes },
298: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 299: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 300: { "uselogin", sUseLogin },
1.111 markus 301: { "compression", sCompression },
1.25 markus 302: { "keepalive", sKeepAlives },
1.53 markus 303: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 304: { "allowusers", sAllowUsers },
305: { "denyusers", sDenyUsers },
306: { "allowgroups", sAllowGroups },
307: { "denygroups", sDenyGroups },
1.33 markus 308: { "ciphers", sCiphers },
1.66 markus 309: { "macs", sMacs },
1.33 markus 310: { "protocol", sProtocol },
1.38 markus 311: { "gatewayports", sGatewayPorts },
1.43 jakob 312: { "subsystem", sSubsystem },
1.46 markus 313: { "maxstartups", sMaxStartups },
1.57 markus 314: { "banner", sBanner },
1.100 markus 315: { "verifyreversemapping", sVerifyReverseMapping },
316: { "reversemappingcheck", sVerifyReverseMapping },
1.77 beck 317: { "clientaliveinterval", sClientAliveInterval },
318: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 319: { "authorizedkeysfile", sAuthorizedKeysFile },
320: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 321: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.92 stevesk 322: { NULL, sBadOption }
1.1 deraadt 323: };
324:
1.27 markus 325: /*
1.73 stevesk 326: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 327: */
1.1 deraadt 328:
1.34 markus 329: static ServerOpCodes
1.25 markus 330: parse_token(const char *cp, const char *filename,
331: int linenum)
1.1 deraadt 332: {
1.55 markus 333: u_int i;
1.1 deraadt 334:
1.25 markus 335: for (i = 0; keywords[i].name; i++)
1.28 markus 336: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 337: return keywords[i].opcode;
338:
1.78 stevesk 339: error("%s: line %d: Bad configuration option: %s",
340: filename, linenum, cp);
1.25 markus 341: return sBadOption;
1.1 deraadt 342: }
343:
1.84 itojun 344: static void
1.76 stevesk 345: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 346: {
347: int i;
348:
349: if (options->num_ports == 0)
350: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 351: if (port == 0)
1.74 stevesk 352: for (i = 0; i < options->num_ports; i++)
353: add_one_listen_addr(options, addr, options->ports[i]);
354: else
1.76 stevesk 355: add_one_listen_addr(options, addr, port);
1.74 stevesk 356: }
357:
1.84 itojun 358: static void
1.74 stevesk 359: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 360: {
361: struct addrinfo hints, *ai, *aitop;
362: char strport[NI_MAXSERV];
363: int gaierr;
364:
1.74 stevesk 365: memset(&hints, 0, sizeof(hints));
366: hints.ai_family = IPv4or6;
367: hints.ai_socktype = SOCK_STREAM;
368: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 369: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 370: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
371: fatal("bad addr or host: %s (%s)",
372: addr ? addr : "<NULL>",
373: gai_strerror(gaierr));
374: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
375: ;
376: ai->ai_next = options->listen_addrs;
377: options->listen_addrs = aitop;
1.29 markus 378: }
379:
1.94 markus 380: int
381: process_server_config_line(ServerOptions *options, char *line,
382: const char *filename, int linenum)
1.1 deraadt 383: {
1.74 stevesk 384: char *cp, **charptr, *arg, *p;
1.112 deraadt 385: int *intptr, value, i, n;
1.25 markus 386: ServerOpCodes opcode;
387:
1.94 markus 388: cp = line;
389: arg = strdelim(&cp);
390: /* Ignore leading whitespace */
391: if (*arg == '\0')
392: arg = strdelim(&cp);
393: if (!arg || !*arg || *arg == '#')
394: return 0;
395: intptr = NULL;
396: charptr = NULL;
397: opcode = parse_token(arg, filename, linenum);
398: switch (opcode) {
399: case sBadOption:
400: return -1;
401: case sPort:
402: /* ignore ports from configfile if cmdline specifies ports */
403: if (options->ports_from_cmdline)
404: return 0;
405: if (options->listen_addrs != NULL)
406: fatal("%s line %d: ports must be specified before "
1.98 stevesk 407: "ListenAddress.", filename, linenum);
1.94 markus 408: if (options->num_ports >= MAX_PORTS)
409: fatal("%s line %d: too many ports.",
410: filename, linenum);
1.48 provos 411: arg = strdelim(&cp);
1.94 markus 412: if (!arg || *arg == '\0')
413: fatal("%s line %d: missing port number.",
414: filename, linenum);
415: options->ports[options->num_ports++] = a2port(arg);
416: if (options->ports[options->num_ports-1] == 0)
417: fatal("%s line %d: Badly formatted port number.",
418: filename, linenum);
419: break;
1.29 markus 420:
1.94 markus 421: case sServerKeyBits:
422: intptr = &options->server_key_bits;
1.25 markus 423: parse_int:
1.94 markus 424: arg = strdelim(&cp);
425: if (!arg || *arg == '\0')
426: fatal("%s line %d: missing integer value.",
427: filename, linenum);
428: value = atoi(arg);
429: if (*intptr == -1)
430: *intptr = value;
431: break;
1.25 markus 432:
1.94 markus 433: case sLoginGraceTime:
434: intptr = &options->login_grace_time;
1.81 stevesk 435: parse_time:
1.94 markus 436: arg = strdelim(&cp);
437: if (!arg || *arg == '\0')
438: fatal("%s line %d: missing time value.",
439: filename, linenum);
440: if ((value = convtime(arg)) == -1)
441: fatal("%s line %d: invalid time value.",
442: filename, linenum);
443: if (*intptr == -1)
444: *intptr = value;
445: break;
446:
447: case sKeyRegenerationTime:
448: intptr = &options->key_regeneration_time;
449: goto parse_time;
450:
451: case sListenAddress:
452: arg = strdelim(&cp);
453: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
454: fatal("%s line %d: missing inet addr.",
455: filename, linenum);
456: if (*arg == '[') {
457: if ((p = strchr(arg, ']')) == NULL)
458: fatal("%s line %d: bad ipv6 inet addr usage.",
459: filename, linenum);
460: arg++;
461: memmove(p, p+1, strlen(p+1)+1);
462: } else if (((p = strchr(arg, ':')) == NULL) ||
463: (strchr(p+1, ':') != NULL)) {
464: add_listen_addr(options, arg, 0);
1.81 stevesk 465: break;
1.94 markus 466: }
467: if (*p == ':') {
468: u_short port;
1.25 markus 469:
1.94 markus 470: p++;
471: if (*p == '\0')
472: fatal("%s line %d: bad inet addr:port usage.",
473: filename, linenum);
474: else {
475: *(p-1) = '\0';
476: if ((port = a2port(p)) == 0)
477: fatal("%s line %d: bad port number.",
1.74 stevesk 478: filename, linenum);
1.94 markus 479: add_listen_addr(options, arg, port);
1.74 stevesk 480: }
1.94 markus 481: } else if (*p == '\0')
482: add_listen_addr(options, arg, 0);
483: else
484: fatal("%s line %d: bad inet addr usage.",
485: filename, linenum);
486: break;
487:
488: case sHostKeyFile:
489: intptr = &options->num_host_key_files;
490: if (*intptr >= MAX_HOSTKEYS)
491: fatal("%s line %d: too many host keys specified (max %d).",
492: filename, linenum, MAX_HOSTKEYS);
493: charptr = &options->host_key_files[*intptr];
494: parse_filename:
495: arg = strdelim(&cp);
496: if (!arg || *arg == '\0')
497: fatal("%s line %d: missing file name.",
498: filename, linenum);
499: if (*charptr == NULL) {
500: *charptr = tilde_expand_filename(arg, getuid());
501: /* increase optional counter */
502: if (intptr != NULL)
503: *intptr = *intptr + 1;
504: }
505: break;
1.76 stevesk 506:
1.94 markus 507: case sPidFile:
508: charptr = &options->pid_file;
509: goto parse_filename;
1.25 markus 510:
1.94 markus 511: case sPermitRootLogin:
512: intptr = &options->permit_root_login;
513: arg = strdelim(&cp);
514: if (!arg || *arg == '\0')
515: fatal("%s line %d: missing yes/"
516: "without-password/forced-commands-only/no "
517: "argument.", filename, linenum);
518: value = 0; /* silence compiler */
519: if (strcmp(arg, "without-password") == 0)
520: value = PERMIT_NO_PASSWD;
521: else if (strcmp(arg, "forced-commands-only") == 0)
522: value = PERMIT_FORCED_ONLY;
523: else if (strcmp(arg, "yes") == 0)
524: value = PERMIT_YES;
525: else if (strcmp(arg, "no") == 0)
526: value = PERMIT_NO;
527: else
528: fatal("%s line %d: Bad yes/"
529: "without-password/forced-commands-only/no "
530: "argument: %s", filename, linenum, arg);
531: if (*intptr == -1)
532: *intptr = value;
533: break;
1.36 markus 534:
1.94 markus 535: case sIgnoreRhosts:
536: intptr = &options->ignore_rhosts;
1.25 markus 537: parse_flag:
1.94 markus 538: arg = strdelim(&cp);
539: if (!arg || *arg == '\0')
540: fatal("%s line %d: missing yes/no argument.",
541: filename, linenum);
542: value = 0; /* silence compiler */
543: if (strcmp(arg, "yes") == 0)
544: value = 1;
545: else if (strcmp(arg, "no") == 0)
546: value = 0;
547: else
548: fatal("%s line %d: Bad yes/no argument: %s",
549: filename, linenum, arg);
550: if (*intptr == -1)
551: *intptr = value;
552: break;
553:
554: case sIgnoreUserKnownHosts:
555: intptr = &options->ignore_user_known_hosts;
556: goto parse_flag;
557:
558: case sRhostsAuthentication:
559: intptr = &options->rhosts_authentication;
560: goto parse_flag;
561:
562: case sRhostsRSAAuthentication:
563: intptr = &options->rhosts_rsa_authentication;
564: goto parse_flag;
565:
566: case sHostbasedAuthentication:
567: intptr = &options->hostbased_authentication;
568: goto parse_flag;
569:
570: case sHostbasedUsesNameFromPacketOnly:
571: intptr = &options->hostbased_uses_name_from_packet_only;
572: goto parse_flag;
573:
574: case sRSAAuthentication:
575: intptr = &options->rsa_authentication;
576: goto parse_flag;
577:
578: case sPubkeyAuthentication:
579: intptr = &options->pubkey_authentication;
580: goto parse_flag;
1.119 ! jakob 581:
1.94 markus 582: case sKerberosAuthentication:
583: intptr = &options->kerberos_authentication;
584: goto parse_flag;
585:
586: case sKerberosOrLocalPasswd:
587: intptr = &options->kerberos_or_local_passwd;
588: goto parse_flag;
589:
590: case sKerberosTicketCleanup:
591: intptr = &options->kerberos_ticket_cleanup;
592: goto parse_flag;
1.119 ! jakob 593:
1.94 markus 594: case sKerberosTgtPassing:
595: intptr = &options->kerberos_tgt_passing;
596: goto parse_flag;
1.119 ! jakob 597:
1.94 markus 598: case sAFSTokenPassing:
599: intptr = &options->afs_token_passing;
600: goto parse_flag;
601:
602: case sPasswordAuthentication:
603: intptr = &options->password_authentication;
604: goto parse_flag;
605:
606: case sKbdInteractiveAuthentication:
607: intptr = &options->kbd_interactive_authentication;
608: goto parse_flag;
609:
610: case sChallengeResponseAuthentication:
611: intptr = &options->challenge_response_authentication;
612: goto parse_flag;
613:
614: case sPrintMotd:
615: intptr = &options->print_motd;
616: goto parse_flag;
617:
618: case sPrintLastLog:
619: intptr = &options->print_lastlog;
620: goto parse_flag;
621:
622: case sX11Forwarding:
623: intptr = &options->x11_forwarding;
624: goto parse_flag;
625:
626: case sX11DisplayOffset:
627: intptr = &options->x11_display_offset;
628: goto parse_int;
1.99 stevesk 629:
630: case sX11UseLocalhost:
631: intptr = &options->x11_use_localhost;
632: goto parse_flag;
1.94 markus 633:
634: case sXAuthLocation:
635: charptr = &options->xauth_location;
636: goto parse_filename;
637:
638: case sStrictModes:
639: intptr = &options->strict_modes;
640: goto parse_flag;
641:
642: case sKeepAlives:
643: intptr = &options->keepalives;
644: goto parse_flag;
645:
646: case sEmptyPasswd:
647: intptr = &options->permit_empty_passwd;
1.113 markus 648: goto parse_flag;
649:
650: case sPermitUserEnvironment:
651: intptr = &options->permit_user_env;
1.94 markus 652: goto parse_flag;
653:
654: case sUseLogin:
655: intptr = &options->use_login;
1.111 markus 656: goto parse_flag;
657:
658: case sCompression:
659: intptr = &options->compression;
1.94 markus 660: goto parse_flag;
661:
662: case sGatewayPorts:
663: intptr = &options->gateway_ports;
664: goto parse_flag;
1.25 markus 665:
1.100 markus 666: case sVerifyReverseMapping:
667: intptr = &options->verify_reverse_mapping;
1.94 markus 668: goto parse_flag;
1.53 markus 669:
1.94 markus 670: case sLogFacility:
671: intptr = (int *) &options->log_facility;
672: arg = strdelim(&cp);
673: value = log_facility_number(arg);
1.101 markus 674: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 675: fatal("%.200s line %d: unsupported log facility '%s'",
676: filename, linenum, arg ? arg : "<NONE>");
677: if (*intptr == -1)
678: *intptr = (SyslogFacility) value;
679: break;
1.25 markus 680:
1.94 markus 681: case sLogLevel:
682: intptr = (int *) &options->log_level;
683: arg = strdelim(&cp);
684: value = log_level_number(arg);
1.101 markus 685: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 686: fatal("%.200s line %d: unsupported log level '%s'",
687: filename, linenum, arg ? arg : "<NONE>");
688: if (*intptr == -1)
689: *intptr = (LogLevel) value;
690: break;
691:
692: case sAllowTcpForwarding:
693: intptr = &options->allow_tcp_forwarding;
694: goto parse_flag;
1.102 provos 695:
696: case sUsePrivilegeSeparation:
697: intptr = &use_privsep;
698: goto parse_flag;
1.94 markus 699:
700: case sAllowUsers:
701: while ((arg = strdelim(&cp)) && *arg != '\0') {
702: if (options->num_allow_users >= MAX_ALLOW_USERS)
703: fatal("%s line %d: too many allow users.",
704: filename, linenum);
1.112 deraadt 705: options->allow_users[options->num_allow_users++] =
706: xstrdup(arg);
1.94 markus 707: }
708: break;
1.25 markus 709:
1.94 markus 710: case sDenyUsers:
711: while ((arg = strdelim(&cp)) && *arg != '\0') {
712: if (options->num_deny_users >= MAX_DENY_USERS)
713: fatal( "%s line %d: too many deny users.",
714: filename, linenum);
1.112 deraadt 715: options->deny_users[options->num_deny_users++] =
716: xstrdup(arg);
1.94 markus 717: }
718: break;
1.25 markus 719:
1.94 markus 720: case sAllowGroups:
721: while ((arg = strdelim(&cp)) && *arg != '\0') {
722: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
723: fatal("%s line %d: too many allow groups.",
724: filename, linenum);
1.112 deraadt 725: options->allow_groups[options->num_allow_groups++] =
726: xstrdup(arg);
1.94 markus 727: }
728: break;
1.33 markus 729:
1.94 markus 730: case sDenyGroups:
731: while ((arg = strdelim(&cp)) && *arg != '\0') {
732: if (options->num_deny_groups >= MAX_DENY_GROUPS)
733: fatal("%s line %d: too many deny groups.",
734: filename, linenum);
735: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
736: }
737: break;
1.66 markus 738:
1.94 markus 739: case sCiphers:
740: arg = strdelim(&cp);
741: if (!arg || *arg == '\0')
742: fatal("%s line %d: Missing argument.", filename, linenum);
743: if (!ciphers_valid(arg))
744: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
745: filename, linenum, arg ? arg : "<NONE>");
746: if (options->ciphers == NULL)
747: options->ciphers = xstrdup(arg);
748: break;
1.33 markus 749:
1.94 markus 750: case sMacs:
751: arg = strdelim(&cp);
752: if (!arg || *arg == '\0')
753: fatal("%s line %d: Missing argument.", filename, linenum);
754: if (!mac_valid(arg))
755: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
756: filename, linenum, arg ? arg : "<NONE>");
757: if (options->macs == NULL)
758: options->macs = xstrdup(arg);
759: break;
1.43 jakob 760:
1.94 markus 761: case sProtocol:
762: intptr = &options->protocol;
763: arg = strdelim(&cp);
764: if (!arg || *arg == '\0')
765: fatal("%s line %d: Missing argument.", filename, linenum);
766: value = proto_spec(arg);
767: if (value == SSH_PROTO_UNKNOWN)
768: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 769: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 770: if (*intptr == SSH_PROTO_UNKNOWN)
771: *intptr = value;
772: break;
773:
774: case sSubsystem:
775: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
776: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 777: filename, linenum);
1.94 markus 778: }
779: arg = strdelim(&cp);
780: if (!arg || *arg == '\0')
781: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 782: filename, linenum);
1.94 markus 783: for (i = 0; i < options->num_subsystems; i++)
784: if (strcmp(arg, options->subsystem_name[i]) == 0)
785: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 786: filename, linenum, arg);
1.94 markus 787: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
788: arg = strdelim(&cp);
789: if (!arg || *arg == '\0')
790: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 791: filename, linenum);
1.94 markus 792: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
793: options->num_subsystems++;
794: break;
1.46 markus 795:
1.94 markus 796: case sMaxStartups:
797: arg = strdelim(&cp);
798: if (!arg || *arg == '\0')
799: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 800: filename, linenum);
1.94 markus 801: if ((n = sscanf(arg, "%d:%d:%d",
802: &options->max_startups_begin,
803: &options->max_startups_rate,
804: &options->max_startups)) == 3) {
805: if (options->max_startups_begin >
806: options->max_startups ||
807: options->max_startups_rate > 100 ||
808: options->max_startups_rate < 1)
1.50 markus 809: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 810: filename, linenum);
1.94 markus 811: } else if (n != 1)
812: fatal("%s line %d: Illegal MaxStartups spec.",
813: filename, linenum);
814: else
815: options->max_startups = options->max_startups_begin;
816: break;
817:
818: case sBanner:
819: charptr = &options->banner;
820: goto parse_filename;
821: /*
822: * These options can contain %X options expanded at
823: * connect time, so that you can specify paths like:
824: *
825: * AuthorizedKeysFile /etc/ssh_keys/%u
826: */
827: case sAuthorizedKeysFile:
828: case sAuthorizedKeysFile2:
829: charptr = (opcode == sAuthorizedKeysFile ) ?
830: &options->authorized_keys_file :
831: &options->authorized_keys_file2;
832: goto parse_filename;
833:
834: case sClientAliveInterval:
835: intptr = &options->client_alive_interval;
836: goto parse_time;
837:
838: case sClientAliveCountMax:
839: intptr = &options->client_alive_count_max;
840: goto parse_int;
841:
842: case sDeprecated:
1.117 itojun 843: logit("%s line %d: Deprecated option %s",
1.94 markus 844: filename, linenum, arg);
845: while (arg)
846: arg = strdelim(&cp);
847: break;
848:
849: default:
850: fatal("%s line %d: Missing handler for opcode %s (%d)",
851: filename, linenum, arg, opcode);
852: }
853: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
854: fatal("%s line %d: garbage at end of line; \"%.200s\".",
855: filename, linenum, arg);
856: return 0;
857: }
858:
859: /* Reads the server configuration file. */
1.25 markus 860:
1.94 markus 861: void
862: read_server_config(ServerOptions *options, const char *filename)
863: {
1.112 deraadt 864: int linenum, bad_options = 0;
865: char line[1024];
1.94 markus 866: FILE *f;
1.81 stevesk 867:
1.116 markus 868: debug2("read_server_config: filename %s", filename);
1.94 markus 869: f = fopen(filename, "r");
870: if (!f) {
871: perror(filename);
872: exit(1);
873: }
874: linenum = 0;
875: while (fgets(line, sizeof(line), f)) {
876: /* Update line number counter. */
877: linenum++;
878: if (process_server_config_line(options, line, filename, linenum) != 0)
879: bad_options++;
1.1 deraadt 880: }
1.25 markus 881: fclose(f);
1.78 stevesk 882: if (bad_options > 0)
883: fatal("%s: terminating, %d bad configuration options",
884: filename, bad_options);
1.1 deraadt 885: }
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