Annotation of src/usr.bin/ssh/servconf.c, Revision 1.122
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"
1.122 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.121 2003/05/15 14:02:47 jakob 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;
1.122 ! markus 101: options->use_dns = -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;
1.122 ! markus 212: if (options->use_dns == -1)
! 213: options->use_dns = 1;
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,
1.122 ! markus 249: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 250: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 251: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.105 stevesk 252: sUsePrivilegeSeparation,
1.121 jakob 253: sDeprecated, sUnsupported
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 */
1.121 jakob 278: #if defined(KRB4) || defined(KRB5)
1.25 markus 279: { "kerberosauthentication", sKerberosAuthentication },
280: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
281: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.85 dugsong 282: { "kerberostgtpassing", sKerberosTgtPassing },
1.121 jakob 283: #else
284: { "kerberosauthentication", sUnsupported },
285: { "kerberosorlocalpasswd", sUnsupported },
286: { "kerberosticketcleanup", sUnsupported },
287: { "kerberostgtpassing", sUnsupported },
288: #endif
289: #if defined(AFS)
1.25 markus 290: { "afstokenpassing", sAFSTokenPassing },
1.121 jakob 291: #else
292: { "afstokenpassing", sUnsupported },
293: #endif
1.25 markus 294: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 295: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 296: { "challengeresponseauthentication", sChallengeResponseAuthentication },
297: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 298: { "checkmail", sDeprecated },
1.25 markus 299: { "listenaddress", sListenAddress },
300: { "printmotd", sPrintMotd },
1.72 stevesk 301: { "printlastlog", sPrintLastLog },
1.25 markus 302: { "ignorerhosts", sIgnoreRhosts },
303: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
304: { "x11forwarding", sX11Forwarding },
305: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 306: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 307: { "xauthlocation", sXAuthLocation },
1.25 markus 308: { "strictmodes", sStrictModes },
309: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 310: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 311: { "uselogin", sUseLogin },
1.111 markus 312: { "compression", sCompression },
1.25 markus 313: { "keepalive", sKeepAlives },
1.53 markus 314: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 315: { "allowusers", sAllowUsers },
316: { "denyusers", sDenyUsers },
317: { "allowgroups", sAllowGroups },
318: { "denygroups", sDenyGroups },
1.33 markus 319: { "ciphers", sCiphers },
1.66 markus 320: { "macs", sMacs },
1.33 markus 321: { "protocol", sProtocol },
1.38 markus 322: { "gatewayports", sGatewayPorts },
1.43 jakob 323: { "subsystem", sSubsystem },
1.46 markus 324: { "maxstartups", sMaxStartups },
1.57 markus 325: { "banner", sBanner },
1.122 ! markus 326: { "usedns", sUseDNS },
! 327: { "verifyreversemapping", sDeprecated },
! 328: { "reversemappingcheck", sDeprecated },
1.77 beck 329: { "clientaliveinterval", sClientAliveInterval },
330: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 331: { "authorizedkeysfile", sAuthorizedKeysFile },
332: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 333: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.92 stevesk 334: { NULL, sBadOption }
1.1 deraadt 335: };
336:
1.27 markus 337: /*
1.73 stevesk 338: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 339: */
1.1 deraadt 340:
1.34 markus 341: static ServerOpCodes
1.25 markus 342: parse_token(const char *cp, const char *filename,
343: int linenum)
1.1 deraadt 344: {
1.55 markus 345: u_int i;
1.1 deraadt 346:
1.25 markus 347: for (i = 0; keywords[i].name; i++)
1.28 markus 348: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 349: return keywords[i].opcode;
350:
1.78 stevesk 351: error("%s: line %d: Bad configuration option: %s",
352: filename, linenum, cp);
1.25 markus 353: return sBadOption;
1.1 deraadt 354: }
355:
1.84 itojun 356: static void
1.76 stevesk 357: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 358: {
359: int i;
360:
361: if (options->num_ports == 0)
362: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 363: if (port == 0)
1.74 stevesk 364: for (i = 0; i < options->num_ports; i++)
365: add_one_listen_addr(options, addr, options->ports[i]);
366: else
1.76 stevesk 367: add_one_listen_addr(options, addr, port);
1.74 stevesk 368: }
369:
1.84 itojun 370: static void
1.74 stevesk 371: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 372: {
373: struct addrinfo hints, *ai, *aitop;
374: char strport[NI_MAXSERV];
375: int gaierr;
376:
1.74 stevesk 377: memset(&hints, 0, sizeof(hints));
378: hints.ai_family = IPv4or6;
379: hints.ai_socktype = SOCK_STREAM;
380: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 381: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 382: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
383: fatal("bad addr or host: %s (%s)",
384: addr ? addr : "<NULL>",
385: gai_strerror(gaierr));
386: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
387: ;
388: ai->ai_next = options->listen_addrs;
389: options->listen_addrs = aitop;
1.29 markus 390: }
391:
1.94 markus 392: int
393: process_server_config_line(ServerOptions *options, char *line,
394: const char *filename, int linenum)
1.1 deraadt 395: {
1.74 stevesk 396: char *cp, **charptr, *arg, *p;
1.112 deraadt 397: int *intptr, value, i, n;
1.25 markus 398: ServerOpCodes opcode;
399:
1.94 markus 400: cp = line;
401: arg = strdelim(&cp);
402: /* Ignore leading whitespace */
403: if (*arg == '\0')
404: arg = strdelim(&cp);
405: if (!arg || !*arg || *arg == '#')
406: return 0;
407: intptr = NULL;
408: charptr = NULL;
409: opcode = parse_token(arg, filename, linenum);
410: switch (opcode) {
411: case sBadOption:
412: return -1;
413: case sPort:
414: /* ignore ports from configfile if cmdline specifies ports */
415: if (options->ports_from_cmdline)
416: return 0;
417: if (options->listen_addrs != NULL)
418: fatal("%s line %d: ports must be specified before "
1.98 stevesk 419: "ListenAddress.", filename, linenum);
1.94 markus 420: if (options->num_ports >= MAX_PORTS)
421: fatal("%s line %d: too many ports.",
422: filename, linenum);
1.48 provos 423: arg = strdelim(&cp);
1.94 markus 424: if (!arg || *arg == '\0')
425: fatal("%s line %d: missing port number.",
426: filename, linenum);
427: options->ports[options->num_ports++] = a2port(arg);
428: if (options->ports[options->num_ports-1] == 0)
429: fatal("%s line %d: Badly formatted port number.",
430: filename, linenum);
431: break;
1.29 markus 432:
1.94 markus 433: case sServerKeyBits:
434: intptr = &options->server_key_bits;
1.25 markus 435: parse_int:
1.94 markus 436: arg = strdelim(&cp);
437: if (!arg || *arg == '\0')
438: fatal("%s line %d: missing integer value.",
439: filename, linenum);
440: value = atoi(arg);
441: if (*intptr == -1)
442: *intptr = value;
443: break;
1.25 markus 444:
1.94 markus 445: case sLoginGraceTime:
446: intptr = &options->login_grace_time;
1.81 stevesk 447: parse_time:
1.94 markus 448: arg = strdelim(&cp);
449: if (!arg || *arg == '\0')
450: fatal("%s line %d: missing time value.",
451: filename, linenum);
452: if ((value = convtime(arg)) == -1)
453: fatal("%s line %d: invalid time value.",
454: filename, linenum);
455: if (*intptr == -1)
456: *intptr = value;
457: break;
458:
459: case sKeyRegenerationTime:
460: intptr = &options->key_regeneration_time;
461: goto parse_time;
462:
463: case sListenAddress:
464: arg = strdelim(&cp);
465: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
466: fatal("%s line %d: missing inet addr.",
467: filename, linenum);
468: if (*arg == '[') {
469: if ((p = strchr(arg, ']')) == NULL)
470: fatal("%s line %d: bad ipv6 inet addr usage.",
471: filename, linenum);
472: arg++;
473: memmove(p, p+1, strlen(p+1)+1);
474: } else if (((p = strchr(arg, ':')) == NULL) ||
475: (strchr(p+1, ':') != NULL)) {
476: add_listen_addr(options, arg, 0);
1.81 stevesk 477: break;
1.94 markus 478: }
479: if (*p == ':') {
480: u_short port;
1.25 markus 481:
1.94 markus 482: p++;
483: if (*p == '\0')
484: fatal("%s line %d: bad inet addr:port usage.",
485: filename, linenum);
486: else {
487: *(p-1) = '\0';
488: if ((port = a2port(p)) == 0)
489: fatal("%s line %d: bad port number.",
1.74 stevesk 490: filename, linenum);
1.94 markus 491: add_listen_addr(options, arg, port);
1.74 stevesk 492: }
1.94 markus 493: } else if (*p == '\0')
494: add_listen_addr(options, arg, 0);
495: else
496: fatal("%s line %d: bad inet addr usage.",
497: filename, linenum);
498: break;
499:
500: case sHostKeyFile:
501: intptr = &options->num_host_key_files;
502: if (*intptr >= MAX_HOSTKEYS)
503: fatal("%s line %d: too many host keys specified (max %d).",
504: filename, linenum, MAX_HOSTKEYS);
505: charptr = &options->host_key_files[*intptr];
506: parse_filename:
507: arg = strdelim(&cp);
508: if (!arg || *arg == '\0')
509: fatal("%s line %d: missing file name.",
510: filename, linenum);
511: if (*charptr == NULL) {
512: *charptr = tilde_expand_filename(arg, getuid());
513: /* increase optional counter */
514: if (intptr != NULL)
515: *intptr = *intptr + 1;
516: }
517: break;
1.76 stevesk 518:
1.94 markus 519: case sPidFile:
520: charptr = &options->pid_file;
521: goto parse_filename;
1.25 markus 522:
1.94 markus 523: case sPermitRootLogin:
524: intptr = &options->permit_root_login;
525: arg = strdelim(&cp);
526: if (!arg || *arg == '\0')
527: fatal("%s line %d: missing yes/"
528: "without-password/forced-commands-only/no "
529: "argument.", filename, linenum);
530: value = 0; /* silence compiler */
531: if (strcmp(arg, "without-password") == 0)
532: value = PERMIT_NO_PASSWD;
533: else if (strcmp(arg, "forced-commands-only") == 0)
534: value = PERMIT_FORCED_ONLY;
535: else if (strcmp(arg, "yes") == 0)
536: value = PERMIT_YES;
537: else if (strcmp(arg, "no") == 0)
538: value = PERMIT_NO;
539: else
540: fatal("%s line %d: Bad yes/"
541: "without-password/forced-commands-only/no "
542: "argument: %s", filename, linenum, arg);
543: if (*intptr == -1)
544: *intptr = value;
545: break;
1.36 markus 546:
1.94 markus 547: case sIgnoreRhosts:
548: intptr = &options->ignore_rhosts;
1.25 markus 549: parse_flag:
1.94 markus 550: arg = strdelim(&cp);
551: if (!arg || *arg == '\0')
552: fatal("%s line %d: missing yes/no argument.",
553: filename, linenum);
554: value = 0; /* silence compiler */
555: if (strcmp(arg, "yes") == 0)
556: value = 1;
557: else if (strcmp(arg, "no") == 0)
558: value = 0;
559: else
560: fatal("%s line %d: Bad yes/no argument: %s",
561: filename, linenum, arg);
562: if (*intptr == -1)
563: *intptr = value;
564: break;
565:
566: case sIgnoreUserKnownHosts:
567: intptr = &options->ignore_user_known_hosts;
568: goto parse_flag;
569:
570: case sRhostsAuthentication:
571: intptr = &options->rhosts_authentication;
572: goto parse_flag;
573:
574: case sRhostsRSAAuthentication:
575: intptr = &options->rhosts_rsa_authentication;
576: goto parse_flag;
577:
578: case sHostbasedAuthentication:
579: intptr = &options->hostbased_authentication;
580: goto parse_flag;
581:
582: case sHostbasedUsesNameFromPacketOnly:
583: intptr = &options->hostbased_uses_name_from_packet_only;
584: goto parse_flag;
585:
586: case sRSAAuthentication:
587: intptr = &options->rsa_authentication;
588: goto parse_flag;
589:
590: case sPubkeyAuthentication:
591: intptr = &options->pubkey_authentication;
592: goto parse_flag;
1.119 jakob 593:
1.94 markus 594: case sKerberosAuthentication:
595: intptr = &options->kerberos_authentication;
596: goto parse_flag;
597:
598: case sKerberosOrLocalPasswd:
599: intptr = &options->kerberos_or_local_passwd;
600: goto parse_flag;
601:
602: case sKerberosTicketCleanup:
603: intptr = &options->kerberos_ticket_cleanup;
604: goto parse_flag;
1.119 jakob 605:
1.94 markus 606: case sKerberosTgtPassing:
607: intptr = &options->kerberos_tgt_passing;
608: goto parse_flag;
1.119 jakob 609:
1.94 markus 610: case sAFSTokenPassing:
611: intptr = &options->afs_token_passing;
612: goto parse_flag;
613:
614: case sPasswordAuthentication:
615: intptr = &options->password_authentication;
616: goto parse_flag;
617:
618: case sKbdInteractiveAuthentication:
619: intptr = &options->kbd_interactive_authentication;
620: goto parse_flag;
621:
622: case sChallengeResponseAuthentication:
623: intptr = &options->challenge_response_authentication;
624: goto parse_flag;
625:
626: case sPrintMotd:
627: intptr = &options->print_motd;
628: goto parse_flag;
629:
630: case sPrintLastLog:
631: intptr = &options->print_lastlog;
632: goto parse_flag;
633:
634: case sX11Forwarding:
635: intptr = &options->x11_forwarding;
636: goto parse_flag;
637:
638: case sX11DisplayOffset:
639: intptr = &options->x11_display_offset;
640: goto parse_int;
1.99 stevesk 641:
642: case sX11UseLocalhost:
643: intptr = &options->x11_use_localhost;
644: goto parse_flag;
1.94 markus 645:
646: case sXAuthLocation:
647: charptr = &options->xauth_location;
648: goto parse_filename;
649:
650: case sStrictModes:
651: intptr = &options->strict_modes;
652: goto parse_flag;
653:
654: case sKeepAlives:
655: intptr = &options->keepalives;
656: goto parse_flag;
657:
658: case sEmptyPasswd:
659: intptr = &options->permit_empty_passwd;
1.113 markus 660: goto parse_flag;
661:
662: case sPermitUserEnvironment:
663: intptr = &options->permit_user_env;
1.94 markus 664: goto parse_flag;
665:
666: case sUseLogin:
667: intptr = &options->use_login;
1.111 markus 668: goto parse_flag;
669:
670: case sCompression:
671: intptr = &options->compression;
1.94 markus 672: goto parse_flag;
673:
674: case sGatewayPorts:
675: intptr = &options->gateway_ports;
676: goto parse_flag;
1.25 markus 677:
1.122 ! markus 678: case sUseDNS:
! 679: intptr = &options->use_dns;
1.94 markus 680: goto parse_flag;
1.53 markus 681:
1.94 markus 682: case sLogFacility:
683: intptr = (int *) &options->log_facility;
684: arg = strdelim(&cp);
685: value = log_facility_number(arg);
1.101 markus 686: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 687: fatal("%.200s line %d: unsupported log facility '%s'",
688: filename, linenum, arg ? arg : "<NONE>");
689: if (*intptr == -1)
690: *intptr = (SyslogFacility) value;
691: break;
1.25 markus 692:
1.94 markus 693: case sLogLevel:
694: intptr = (int *) &options->log_level;
695: arg = strdelim(&cp);
696: value = log_level_number(arg);
1.101 markus 697: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 698: fatal("%.200s line %d: unsupported log level '%s'",
699: filename, linenum, arg ? arg : "<NONE>");
700: if (*intptr == -1)
701: *intptr = (LogLevel) value;
702: break;
703:
704: case sAllowTcpForwarding:
705: intptr = &options->allow_tcp_forwarding;
706: goto parse_flag;
1.102 provos 707:
708: case sUsePrivilegeSeparation:
709: intptr = &use_privsep;
710: goto parse_flag;
1.94 markus 711:
712: case sAllowUsers:
713: while ((arg = strdelim(&cp)) && *arg != '\0') {
714: if (options->num_allow_users >= MAX_ALLOW_USERS)
715: fatal("%s line %d: too many allow users.",
716: filename, linenum);
1.112 deraadt 717: options->allow_users[options->num_allow_users++] =
718: xstrdup(arg);
1.94 markus 719: }
720: break;
1.25 markus 721:
1.94 markus 722: case sDenyUsers:
723: while ((arg = strdelim(&cp)) && *arg != '\0') {
724: if (options->num_deny_users >= MAX_DENY_USERS)
725: fatal( "%s line %d: too many deny users.",
726: filename, linenum);
1.112 deraadt 727: options->deny_users[options->num_deny_users++] =
728: xstrdup(arg);
1.94 markus 729: }
730: break;
1.25 markus 731:
1.94 markus 732: case sAllowGroups:
733: while ((arg = strdelim(&cp)) && *arg != '\0') {
734: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
735: fatal("%s line %d: too many allow groups.",
736: filename, linenum);
1.112 deraadt 737: options->allow_groups[options->num_allow_groups++] =
738: xstrdup(arg);
1.94 markus 739: }
740: break;
1.33 markus 741:
1.94 markus 742: case sDenyGroups:
743: while ((arg = strdelim(&cp)) && *arg != '\0') {
744: if (options->num_deny_groups >= MAX_DENY_GROUPS)
745: fatal("%s line %d: too many deny groups.",
746: filename, linenum);
747: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
748: }
749: break;
1.66 markus 750:
1.94 markus 751: case sCiphers:
752: arg = strdelim(&cp);
753: if (!arg || *arg == '\0')
754: fatal("%s line %d: Missing argument.", filename, linenum);
755: if (!ciphers_valid(arg))
756: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
757: filename, linenum, arg ? arg : "<NONE>");
758: if (options->ciphers == NULL)
759: options->ciphers = xstrdup(arg);
760: break;
1.33 markus 761:
1.94 markus 762: case sMacs:
763: arg = strdelim(&cp);
764: if (!arg || *arg == '\0')
765: fatal("%s line %d: Missing argument.", filename, linenum);
766: if (!mac_valid(arg))
767: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
768: filename, linenum, arg ? arg : "<NONE>");
769: if (options->macs == NULL)
770: options->macs = xstrdup(arg);
771: break;
1.43 jakob 772:
1.94 markus 773: case sProtocol:
774: intptr = &options->protocol;
775: arg = strdelim(&cp);
776: if (!arg || *arg == '\0')
777: fatal("%s line %d: Missing argument.", filename, linenum);
778: value = proto_spec(arg);
779: if (value == SSH_PROTO_UNKNOWN)
780: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 781: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 782: if (*intptr == SSH_PROTO_UNKNOWN)
783: *intptr = value;
784: break;
785:
786: case sSubsystem:
787: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
788: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 789: filename, linenum);
1.94 markus 790: }
791: arg = strdelim(&cp);
792: if (!arg || *arg == '\0')
793: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 794: filename, linenum);
1.94 markus 795: for (i = 0; i < options->num_subsystems; i++)
796: if (strcmp(arg, options->subsystem_name[i]) == 0)
797: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 798: filename, linenum, arg);
1.94 markus 799: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
800: arg = strdelim(&cp);
801: if (!arg || *arg == '\0')
802: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 803: filename, linenum);
1.94 markus 804: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
805: options->num_subsystems++;
806: break;
1.46 markus 807:
1.94 markus 808: case sMaxStartups:
809: arg = strdelim(&cp);
810: if (!arg || *arg == '\0')
811: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 812: filename, linenum);
1.94 markus 813: if ((n = sscanf(arg, "%d:%d:%d",
814: &options->max_startups_begin,
815: &options->max_startups_rate,
816: &options->max_startups)) == 3) {
817: if (options->max_startups_begin >
818: options->max_startups ||
819: options->max_startups_rate > 100 ||
820: options->max_startups_rate < 1)
1.50 markus 821: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 822: filename, linenum);
1.94 markus 823: } else if (n != 1)
824: fatal("%s line %d: Illegal MaxStartups spec.",
825: filename, linenum);
826: else
827: options->max_startups = options->max_startups_begin;
828: break;
829:
830: case sBanner:
831: charptr = &options->banner;
832: goto parse_filename;
833: /*
834: * These options can contain %X options expanded at
835: * connect time, so that you can specify paths like:
836: *
837: * AuthorizedKeysFile /etc/ssh_keys/%u
838: */
839: case sAuthorizedKeysFile:
840: case sAuthorizedKeysFile2:
841: charptr = (opcode == sAuthorizedKeysFile ) ?
842: &options->authorized_keys_file :
843: &options->authorized_keys_file2;
844: goto parse_filename;
845:
846: case sClientAliveInterval:
847: intptr = &options->client_alive_interval;
848: goto parse_time;
849:
850: case sClientAliveCountMax:
851: intptr = &options->client_alive_count_max;
852: goto parse_int;
853:
854: case sDeprecated:
1.117 itojun 855: logit("%s line %d: Deprecated option %s",
1.121 jakob 856: filename, linenum, arg);
857: while (arg)
858: arg = strdelim(&cp);
859: break;
860:
861: case sUnsupported:
862: logit("%s line %d: Unsupported option %s",
1.94 markus 863: filename, linenum, arg);
864: while (arg)
865: arg = strdelim(&cp);
866: break;
867:
868: default:
869: fatal("%s line %d: Missing handler for opcode %s (%d)",
870: filename, linenum, arg, opcode);
871: }
872: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
873: fatal("%s line %d: garbage at end of line; \"%.200s\".",
874: filename, linenum, arg);
875: return 0;
876: }
877:
878: /* Reads the server configuration file. */
1.25 markus 879:
1.94 markus 880: void
881: read_server_config(ServerOptions *options, const char *filename)
882: {
1.112 deraadt 883: int linenum, bad_options = 0;
884: char line[1024];
1.94 markus 885: FILE *f;
1.81 stevesk 886:
1.116 markus 887: debug2("read_server_config: filename %s", filename);
1.94 markus 888: f = fopen(filename, "r");
889: if (!f) {
890: perror(filename);
891: exit(1);
892: }
893: linenum = 0;
894: while (fgets(line, sizeof(line), f)) {
895: /* Update line number counter. */
896: linenum++;
897: if (process_server_config_line(options, line, filename, linenum) != 0)
898: bad_options++;
1.1 deraadt 899: }
1.25 markus 900: fclose(f);
1.78 stevesk 901: if (bad_options > 0)
902: fatal("%s: terminating, %d bad configuration options",
903: filename, bad_options);
1.1 deraadt 904: }
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