Annotation of src/usr.bin/ssh/servconf.c, Revision 1.129
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"
1.129 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.128 2003/09/29 20:19:57 markus Exp $");
1.1 deraadt 14:
15: #include "ssh.h"
1.62 markus 16: #include "log.h"
1.1 deraadt 17: #include "servconf.h"
18: #include "xmalloc.h"
1.33 markus 19: #include "compat.h"
1.60 markus 20: #include "pathnames.h"
1.62 markus 21: #include "tildexpand.h"
22: #include "misc.h"
23: #include "cipher.h"
1.66 markus 24: #include "kex.h"
25: #include "mac.h"
1.1 deraadt 26:
1.84 itojun 27: static void add_listen_addr(ServerOptions *, char *, u_short);
28: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 29:
1.62 markus 30: /* AF_UNSPEC or AF_INET or AF_INET6 */
31: extern int IPv4or6;
1.102 provos 32: /* Use of privilege separation or not */
33: extern int use_privsep;
1.62 markus 34:
1.1 deraadt 35: /* Initializes the server options to their default values. */
36:
1.34 markus 37: void
1.25 markus 38: initialize_server_options(ServerOptions *options)
1.1 deraadt 39: {
1.25 markus 40: memset(options, 0, sizeof(*options));
1.29 markus 41: options->num_ports = 0;
42: options->ports_from_cmdline = 0;
43: options->listen_addrs = NULL;
1.54 markus 44: options->num_host_key_files = 0;
1.36 markus 45: options->pid_file = NULL;
1.25 markus 46: options->server_key_bits = -1;
47: options->login_grace_time = -1;
48: options->key_regeneration_time = -1;
1.67 markus 49: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 50: options->ignore_rhosts = -1;
51: options->ignore_user_known_hosts = -1;
52: options->print_motd = -1;
1.72 stevesk 53: options->print_lastlog = -1;
1.25 markus 54: options->x11_forwarding = -1;
55: options->x11_display_offset = -1;
1.99 stevesk 56: options->x11_use_localhost = -1;
1.42 markus 57: options->xauth_location = NULL;
1.25 markus 58: options->strict_modes = -1;
1.129 ! markus 59: options->tcp_keep_alive = -1;
1.101 markus 60: options->log_facility = SYSLOG_FACILITY_NOT_SET;
61: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 62: options->rhosts_rsa_authentication = -1;
1.75 markus 63: options->hostbased_authentication = -1;
64: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 65: options->rsa_authentication = -1;
1.54 markus 66: options->pubkey_authentication = -1;
1.25 markus 67: options->kerberos_authentication = -1;
68: options->kerberos_or_local_passwd = -1;
69: options->kerberos_ticket_cleanup = -1;
1.125 markus 70: options->gss_authentication=-1;
71: options->gss_cleanup_creds = -1;
1.25 markus 72: options->password_authentication = -1;
1.52 markus 73: options->kbd_interactive_authentication = -1;
1.80 markus 74: options->challenge_response_authentication = -1;
1.25 markus 75: options->permit_empty_passwd = -1;
1.113 markus 76: options->permit_user_env = -1;
1.25 markus 77: options->use_login = -1;
1.111 markus 78: options->compression = -1;
1.53 markus 79: options->allow_tcp_forwarding = -1;
1.25 markus 80: options->num_allow_users = 0;
81: options->num_deny_users = 0;
82: options->num_allow_groups = 0;
83: options->num_deny_groups = 0;
1.33 markus 84: options->ciphers = NULL;
1.66 markus 85: options->macs = NULL;
1.33 markus 86: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 87: options->gateway_ports = -1;
1.43 jakob 88: options->num_subsystems = 0;
1.50 markus 89: options->max_startups_begin = -1;
90: options->max_startups_rate = -1;
1.46 markus 91: options->max_startups = -1;
1.57 markus 92: options->banner = NULL;
1.122 markus 93: options->use_dns = -1;
1.77 beck 94: options->client_alive_interval = -1;
95: options->client_alive_count_max = -1;
1.82 markus 96: options->authorized_keys_file = NULL;
97: options->authorized_keys_file2 = NULL;
1.102 provos 98:
99: /* Needs to be accessable in many places */
100: use_privsep = -1;
1.1 deraadt 101: }
102:
1.34 markus 103: void
1.25 markus 104: fill_default_server_options(ServerOptions *options)
1.1 deraadt 105: {
1.54 markus 106: if (options->protocol == SSH_PROTO_UNKNOWN)
107: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
108: if (options->num_host_key_files == 0) {
109: /* fill default hostkeys for protocols */
110: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 111: options->host_key_files[options->num_host_key_files++] =
112: _PATH_HOST_KEY_FILE;
113: if (options->protocol & SSH_PROTO_2) {
114: options->host_key_files[options->num_host_key_files++] =
115: _PATH_HOST_RSA_KEY_FILE;
116: options->host_key_files[options->num_host_key_files++] =
117: _PATH_HOST_DSA_KEY_FILE;
118: }
1.54 markus 119: }
1.29 markus 120: if (options->num_ports == 0)
121: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
122: if (options->listen_addrs == NULL)
1.76 stevesk 123: add_listen_addr(options, NULL, 0);
1.36 markus 124: if (options->pid_file == NULL)
1.60 markus 125: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 126: if (options->server_key_bits == -1)
127: options->server_key_bits = 768;
128: if (options->login_grace_time == -1)
1.115 stevesk 129: options->login_grace_time = 120;
1.25 markus 130: if (options->key_regeneration_time == -1)
131: options->key_regeneration_time = 3600;
1.67 markus 132: if (options->permit_root_login == PERMIT_NOT_SET)
133: options->permit_root_login = PERMIT_YES;
1.25 markus 134: if (options->ignore_rhosts == -1)
1.30 markus 135: options->ignore_rhosts = 1;
1.25 markus 136: if (options->ignore_user_known_hosts == -1)
137: options->ignore_user_known_hosts = 0;
138: if (options->print_motd == -1)
139: options->print_motd = 1;
1.72 stevesk 140: if (options->print_lastlog == -1)
141: options->print_lastlog = 1;
1.25 markus 142: if (options->x11_forwarding == -1)
1.30 markus 143: options->x11_forwarding = 0;
1.25 markus 144: if (options->x11_display_offset == -1)
1.30 markus 145: options->x11_display_offset = 10;
1.99 stevesk 146: if (options->x11_use_localhost == -1)
147: options->x11_use_localhost = 1;
1.42 markus 148: if (options->xauth_location == NULL)
1.83 markus 149: options->xauth_location = _PATH_XAUTH;
1.25 markus 150: if (options->strict_modes == -1)
151: options->strict_modes = 1;
1.129 ! markus 152: if (options->tcp_keep_alive == -1)
! 153: options->tcp_keep_alive = 1;
1.101 markus 154: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 155: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 156: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 157: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 158: if (options->rhosts_rsa_authentication == -1)
1.30 markus 159: options->rhosts_rsa_authentication = 0;
1.75 markus 160: if (options->hostbased_authentication == -1)
161: options->hostbased_authentication = 0;
162: if (options->hostbased_uses_name_from_packet_only == -1)
163: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 164: if (options->rsa_authentication == -1)
165: options->rsa_authentication = 1;
1.54 markus 166: if (options->pubkey_authentication == -1)
167: options->pubkey_authentication = 1;
1.25 markus 168: if (options->kerberos_authentication == -1)
1.107 markus 169: options->kerberos_authentication = 0;
1.25 markus 170: if (options->kerberos_or_local_passwd == -1)
171: options->kerberos_or_local_passwd = 1;
172: if (options->kerberos_ticket_cleanup == -1)
173: options->kerberos_ticket_cleanup = 1;
1.125 markus 174: if (options->gss_authentication == -1)
175: options->gss_authentication = 0;
176: if (options->gss_cleanup_creds == -1)
177: options->gss_cleanup_creds = 1;
1.25 markus 178: if (options->password_authentication == -1)
179: options->password_authentication = 1;
1.52 markus 180: if (options->kbd_interactive_authentication == -1)
181: options->kbd_interactive_authentication = 0;
1.80 markus 182: if (options->challenge_response_authentication == -1)
183: options->challenge_response_authentication = 1;
1.25 markus 184: if (options->permit_empty_passwd == -1)
1.30 markus 185: options->permit_empty_passwd = 0;
1.113 markus 186: if (options->permit_user_env == -1)
187: options->permit_user_env = 0;
1.25 markus 188: if (options->use_login == -1)
189: options->use_login = 0;
1.111 markus 190: if (options->compression == -1)
191: options->compression = 1;
1.53 markus 192: if (options->allow_tcp_forwarding == -1)
193: options->allow_tcp_forwarding = 1;
1.38 markus 194: if (options->gateway_ports == -1)
195: options->gateway_ports = 0;
1.46 markus 196: if (options->max_startups == -1)
197: options->max_startups = 10;
1.50 markus 198: if (options->max_startups_rate == -1)
199: options->max_startups_rate = 100; /* 100% */
200: if (options->max_startups_begin == -1)
201: options->max_startups_begin = options->max_startups;
1.122 markus 202: if (options->use_dns == -1)
203: options->use_dns = 1;
1.77 beck 204: if (options->client_alive_interval == -1)
1.95 deraadt 205: options->client_alive_interval = 0;
1.77 beck 206: if (options->client_alive_count_max == -1)
207: options->client_alive_count_max = 3;
1.90 markus 208: if (options->authorized_keys_file2 == NULL) {
209: /* authorized_keys_file2 falls back to authorized_keys_file */
210: if (options->authorized_keys_file != NULL)
211: options->authorized_keys_file2 = options->authorized_keys_file;
212: else
213: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
214: }
215: if (options->authorized_keys_file == NULL)
216: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.102 provos 217:
1.110 markus 218: /* Turn privilege separation on by default */
1.102 provos 219: if (use_privsep == -1)
1.110 markus 220: use_privsep = 1;
1.1 deraadt 221: }
222:
223: /* Keyword tokens. */
1.25 markus 224: typedef enum {
225: sBadOption, /* == unknown option */
226: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
227: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 228: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 229: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.123 markus 230: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.52 markus 231: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 232: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 233: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 ! markus 234: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 235: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 236: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 237: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 238: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.122 markus 239: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 240: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 241: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.125 markus 242: sGssAuthentication, sGssCleanupCreds,
1.105 stevesk 243: sUsePrivilegeSeparation,
1.121 jakob 244: sDeprecated, sUnsupported
1.1 deraadt 245: } ServerOpCodes;
246:
247: /* Textual representation of the tokens. */
1.25 markus 248: static struct {
249: const char *name;
250: ServerOpCodes opcode;
251: } keywords[] = {
252: { "port", sPort },
253: { "hostkey", sHostKeyFile },
1.54 markus 254: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 255: { "pidfile", sPidFile },
1.25 markus 256: { "serverkeybits", sServerKeyBits },
257: { "logingracetime", sLoginGraceTime },
258: { "keyregenerationinterval", sKeyRegenerationTime },
259: { "permitrootlogin", sPermitRootLogin },
260: { "syslogfacility", sLogFacility },
261: { "loglevel", sLogLevel },
1.124 markus 262: { "rhostsauthentication", sDeprecated },
1.25 markus 263: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 264: { "hostbasedauthentication", sHostbasedAuthentication },
265: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 266: { "rsaauthentication", sRSAAuthentication },
1.54 markus 267: { "pubkeyauthentication", sPubkeyAuthentication },
268: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.123 markus 269: #ifdef KRB5
1.25 markus 270: { "kerberosauthentication", sKerberosAuthentication },
271: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
272: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.121 jakob 273: #else
274: { "kerberosauthentication", sUnsupported },
275: { "kerberosorlocalpasswd", sUnsupported },
276: { "kerberosticketcleanup", sUnsupported },
1.126 markus 277: #endif
1.121 jakob 278: { "kerberostgtpassing", sUnsupported },
279: { "afstokenpassing", sUnsupported },
1.125 markus 280: #ifdef GSSAPI
281: { "gssapiauthentication", sGssAuthentication },
1.128 markus 282: { "gssapicleanupcredentials", sGssCleanupCreds },
1.125 markus 283: #else
284: { "gssapiauthentication", sUnsupported },
1.128 markus 285: { "gssapicleanupcredentials", sUnsupported },
1.125 markus 286: #endif
1.25 markus 287: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 288: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 289: { "challengeresponseauthentication", sChallengeResponseAuthentication },
290: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 291: { "checkmail", sDeprecated },
1.25 markus 292: { "listenaddress", sListenAddress },
293: { "printmotd", sPrintMotd },
1.72 stevesk 294: { "printlastlog", sPrintLastLog },
1.25 markus 295: { "ignorerhosts", sIgnoreRhosts },
296: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
297: { "x11forwarding", sX11Forwarding },
298: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 299: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 300: { "xauthlocation", sXAuthLocation },
1.25 markus 301: { "strictmodes", sStrictModes },
302: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 303: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 304: { "uselogin", sUseLogin },
1.111 markus 305: { "compression", sCompression },
1.129 ! markus 306: { "tcpkeepalive", sTCPKeepAlive },
! 307: { "keepalive", sTCPKeepAlive }, /* obsolete alias */
1.53 markus 308: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 309: { "allowusers", sAllowUsers },
310: { "denyusers", sDenyUsers },
311: { "allowgroups", sAllowGroups },
312: { "denygroups", sDenyGroups },
1.33 markus 313: { "ciphers", sCiphers },
1.66 markus 314: { "macs", sMacs },
1.33 markus 315: { "protocol", sProtocol },
1.38 markus 316: { "gatewayports", sGatewayPorts },
1.43 jakob 317: { "subsystem", sSubsystem },
1.46 markus 318: { "maxstartups", sMaxStartups },
1.57 markus 319: { "banner", sBanner },
1.122 markus 320: { "usedns", sUseDNS },
321: { "verifyreversemapping", sDeprecated },
322: { "reversemappingcheck", sDeprecated },
1.77 beck 323: { "clientaliveinterval", sClientAliveInterval },
324: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 325: { "authorizedkeysfile", sAuthorizedKeysFile },
326: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 327: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.92 stevesk 328: { NULL, sBadOption }
1.1 deraadt 329: };
330:
1.27 markus 331: /*
1.73 stevesk 332: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 333: */
1.1 deraadt 334:
1.34 markus 335: static ServerOpCodes
1.25 markus 336: parse_token(const char *cp, const char *filename,
337: int linenum)
1.1 deraadt 338: {
1.55 markus 339: u_int i;
1.1 deraadt 340:
1.25 markus 341: for (i = 0; keywords[i].name; i++)
1.28 markus 342: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 343: return keywords[i].opcode;
344:
1.78 stevesk 345: error("%s: line %d: Bad configuration option: %s",
346: filename, linenum, cp);
1.25 markus 347: return sBadOption;
1.1 deraadt 348: }
349:
1.84 itojun 350: static void
1.76 stevesk 351: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 352: {
353: int i;
354:
355: if (options->num_ports == 0)
356: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 357: if (port == 0)
1.74 stevesk 358: for (i = 0; i < options->num_ports; i++)
359: add_one_listen_addr(options, addr, options->ports[i]);
360: else
1.76 stevesk 361: add_one_listen_addr(options, addr, port);
1.74 stevesk 362: }
363:
1.84 itojun 364: static void
1.74 stevesk 365: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 366: {
367: struct addrinfo hints, *ai, *aitop;
368: char strport[NI_MAXSERV];
369: int gaierr;
370:
1.74 stevesk 371: memset(&hints, 0, sizeof(hints));
372: hints.ai_family = IPv4or6;
373: hints.ai_socktype = SOCK_STREAM;
374: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 375: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 376: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
377: fatal("bad addr or host: %s (%s)",
378: addr ? addr : "<NULL>",
379: gai_strerror(gaierr));
380: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
381: ;
382: ai->ai_next = options->listen_addrs;
383: options->listen_addrs = aitop;
1.29 markus 384: }
385:
1.94 markus 386: int
387: process_server_config_line(ServerOptions *options, char *line,
388: const char *filename, int linenum)
1.1 deraadt 389: {
1.74 stevesk 390: char *cp, **charptr, *arg, *p;
1.112 deraadt 391: int *intptr, value, i, n;
1.25 markus 392: ServerOpCodes opcode;
393:
1.94 markus 394: cp = line;
395: arg = strdelim(&cp);
396: /* Ignore leading whitespace */
397: if (*arg == '\0')
398: arg = strdelim(&cp);
399: if (!arg || !*arg || *arg == '#')
400: return 0;
401: intptr = NULL;
402: charptr = NULL;
403: opcode = parse_token(arg, filename, linenum);
404: switch (opcode) {
405: case sBadOption:
406: return -1;
407: case sPort:
408: /* ignore ports from configfile if cmdline specifies ports */
409: if (options->ports_from_cmdline)
410: return 0;
411: if (options->listen_addrs != NULL)
412: fatal("%s line %d: ports must be specified before "
1.98 stevesk 413: "ListenAddress.", filename, linenum);
1.94 markus 414: if (options->num_ports >= MAX_PORTS)
415: fatal("%s line %d: too many ports.",
416: filename, linenum);
1.48 provos 417: arg = strdelim(&cp);
1.94 markus 418: if (!arg || *arg == '\0')
419: fatal("%s line %d: missing port number.",
420: filename, linenum);
421: options->ports[options->num_ports++] = a2port(arg);
422: if (options->ports[options->num_ports-1] == 0)
423: fatal("%s line %d: Badly formatted port number.",
424: filename, linenum);
425: break;
1.29 markus 426:
1.94 markus 427: case sServerKeyBits:
428: intptr = &options->server_key_bits;
1.25 markus 429: parse_int:
1.94 markus 430: arg = strdelim(&cp);
431: if (!arg || *arg == '\0')
432: fatal("%s line %d: missing integer value.",
433: filename, linenum);
434: value = atoi(arg);
435: if (*intptr == -1)
436: *intptr = value;
437: break;
1.25 markus 438:
1.94 markus 439: case sLoginGraceTime:
440: intptr = &options->login_grace_time;
1.81 stevesk 441: parse_time:
1.94 markus 442: arg = strdelim(&cp);
443: if (!arg || *arg == '\0')
444: fatal("%s line %d: missing time value.",
445: filename, linenum);
446: if ((value = convtime(arg)) == -1)
447: fatal("%s line %d: invalid time value.",
448: filename, linenum);
449: if (*intptr == -1)
450: *intptr = value;
451: break;
452:
453: case sKeyRegenerationTime:
454: intptr = &options->key_regeneration_time;
455: goto parse_time;
456:
457: case sListenAddress:
458: arg = strdelim(&cp);
459: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
460: fatal("%s line %d: missing inet addr.",
461: filename, linenum);
462: if (*arg == '[') {
463: if ((p = strchr(arg, ']')) == NULL)
464: fatal("%s line %d: bad ipv6 inet addr usage.",
465: filename, linenum);
466: arg++;
467: memmove(p, p+1, strlen(p+1)+1);
468: } else if (((p = strchr(arg, ':')) == NULL) ||
469: (strchr(p+1, ':') != NULL)) {
470: add_listen_addr(options, arg, 0);
1.81 stevesk 471: break;
1.94 markus 472: }
473: if (*p == ':') {
474: u_short port;
1.25 markus 475:
1.94 markus 476: p++;
477: if (*p == '\0')
478: fatal("%s line %d: bad inet addr:port usage.",
479: filename, linenum);
480: else {
481: *(p-1) = '\0';
482: if ((port = a2port(p)) == 0)
483: fatal("%s line %d: bad port number.",
1.74 stevesk 484: filename, linenum);
1.94 markus 485: add_listen_addr(options, arg, port);
1.74 stevesk 486: }
1.94 markus 487: } else if (*p == '\0')
488: add_listen_addr(options, arg, 0);
489: else
490: fatal("%s line %d: bad inet addr usage.",
491: filename, linenum);
492: break;
493:
494: case sHostKeyFile:
495: intptr = &options->num_host_key_files;
496: if (*intptr >= MAX_HOSTKEYS)
497: fatal("%s line %d: too many host keys specified (max %d).",
498: filename, linenum, MAX_HOSTKEYS);
499: charptr = &options->host_key_files[*intptr];
500: parse_filename:
501: arg = strdelim(&cp);
502: if (!arg || *arg == '\0')
503: fatal("%s line %d: missing file name.",
504: filename, linenum);
505: if (*charptr == NULL) {
506: *charptr = tilde_expand_filename(arg, getuid());
507: /* increase optional counter */
508: if (intptr != NULL)
509: *intptr = *intptr + 1;
510: }
511: break;
1.76 stevesk 512:
1.94 markus 513: case sPidFile:
514: charptr = &options->pid_file;
515: goto parse_filename;
1.25 markus 516:
1.94 markus 517: case sPermitRootLogin:
518: intptr = &options->permit_root_login;
519: arg = strdelim(&cp);
520: if (!arg || *arg == '\0')
521: fatal("%s line %d: missing yes/"
522: "without-password/forced-commands-only/no "
523: "argument.", filename, linenum);
524: value = 0; /* silence compiler */
525: if (strcmp(arg, "without-password") == 0)
526: value = PERMIT_NO_PASSWD;
527: else if (strcmp(arg, "forced-commands-only") == 0)
528: value = PERMIT_FORCED_ONLY;
529: else if (strcmp(arg, "yes") == 0)
530: value = PERMIT_YES;
531: else if (strcmp(arg, "no") == 0)
532: value = PERMIT_NO;
533: else
534: fatal("%s line %d: Bad yes/"
535: "without-password/forced-commands-only/no "
536: "argument: %s", filename, linenum, arg);
537: if (*intptr == -1)
538: *intptr = value;
539: break;
1.36 markus 540:
1.94 markus 541: case sIgnoreRhosts:
542: intptr = &options->ignore_rhosts;
1.25 markus 543: parse_flag:
1.94 markus 544: arg = strdelim(&cp);
545: if (!arg || *arg == '\0')
546: fatal("%s line %d: missing yes/no argument.",
547: filename, linenum);
548: value = 0; /* silence compiler */
549: if (strcmp(arg, "yes") == 0)
550: value = 1;
551: else if (strcmp(arg, "no") == 0)
552: value = 0;
553: else
554: fatal("%s line %d: Bad yes/no argument: %s",
555: filename, linenum, arg);
556: if (*intptr == -1)
557: *intptr = value;
558: break;
559:
560: case sIgnoreUserKnownHosts:
561: intptr = &options->ignore_user_known_hosts;
562: goto parse_flag;
563:
564: case sRhostsRSAAuthentication:
565: intptr = &options->rhosts_rsa_authentication;
566: goto parse_flag;
567:
568: case sHostbasedAuthentication:
569: intptr = &options->hostbased_authentication;
570: goto parse_flag;
571:
572: case sHostbasedUsesNameFromPacketOnly:
573: intptr = &options->hostbased_uses_name_from_packet_only;
574: goto parse_flag;
575:
576: case sRSAAuthentication:
577: intptr = &options->rsa_authentication;
578: goto parse_flag;
579:
580: case sPubkeyAuthentication:
581: intptr = &options->pubkey_authentication;
582: goto parse_flag;
1.119 jakob 583:
1.94 markus 584: case sKerberosAuthentication:
585: intptr = &options->kerberos_authentication;
586: goto parse_flag;
587:
588: case sKerberosOrLocalPasswd:
589: intptr = &options->kerberos_or_local_passwd;
590: goto parse_flag;
591:
592: case sKerberosTicketCleanup:
593: intptr = &options->kerberos_ticket_cleanup;
1.125 markus 594: goto parse_flag;
595:
596: case sGssAuthentication:
597: intptr = &options->gss_authentication;
598: goto parse_flag;
599:
600: case sGssCleanupCreds:
601: intptr = &options->gss_cleanup_creds;
1.94 markus 602: goto parse_flag;
603:
604: case sPasswordAuthentication:
605: intptr = &options->password_authentication;
606: goto parse_flag;
607:
608: case sKbdInteractiveAuthentication:
609: intptr = &options->kbd_interactive_authentication;
610: goto parse_flag;
611:
612: case sChallengeResponseAuthentication:
613: intptr = &options->challenge_response_authentication;
614: goto parse_flag;
615:
616: case sPrintMotd:
617: intptr = &options->print_motd;
618: goto parse_flag;
619:
620: case sPrintLastLog:
621: intptr = &options->print_lastlog;
622: goto parse_flag;
623:
624: case sX11Forwarding:
625: intptr = &options->x11_forwarding;
626: goto parse_flag;
627:
628: case sX11DisplayOffset:
629: intptr = &options->x11_display_offset;
630: goto parse_int;
1.99 stevesk 631:
632: case sX11UseLocalhost:
633: intptr = &options->x11_use_localhost;
634: goto parse_flag;
1.94 markus 635:
636: case sXAuthLocation:
637: charptr = &options->xauth_location;
638: goto parse_filename;
639:
640: case sStrictModes:
641: intptr = &options->strict_modes;
642: goto parse_flag;
643:
1.129 ! markus 644: case sTCPKeepAlive:
! 645: intptr = &options->tcp_keep_alive;
1.94 markus 646: goto parse_flag;
647:
648: case sEmptyPasswd:
649: intptr = &options->permit_empty_passwd;
1.113 markus 650: goto parse_flag;
651:
652: case sPermitUserEnvironment:
653: intptr = &options->permit_user_env;
1.94 markus 654: goto parse_flag;
655:
656: case sUseLogin:
657: intptr = &options->use_login;
1.111 markus 658: goto parse_flag;
659:
660: case sCompression:
661: intptr = &options->compression;
1.94 markus 662: goto parse_flag;
663:
664: case sGatewayPorts:
665: intptr = &options->gateway_ports;
666: goto parse_flag;
1.25 markus 667:
1.122 markus 668: case sUseDNS:
669: intptr = &options->use_dns;
1.94 markus 670: goto parse_flag;
1.53 markus 671:
1.94 markus 672: case sLogFacility:
673: intptr = (int *) &options->log_facility;
674: arg = strdelim(&cp);
675: value = log_facility_number(arg);
1.101 markus 676: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 677: fatal("%.200s line %d: unsupported log facility '%s'",
678: filename, linenum, arg ? arg : "<NONE>");
679: if (*intptr == -1)
680: *intptr = (SyslogFacility) value;
681: break;
1.25 markus 682:
1.94 markus 683: case sLogLevel:
684: intptr = (int *) &options->log_level;
685: arg = strdelim(&cp);
686: value = log_level_number(arg);
1.101 markus 687: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 688: fatal("%.200s line %d: unsupported log level '%s'",
689: filename, linenum, arg ? arg : "<NONE>");
690: if (*intptr == -1)
691: *intptr = (LogLevel) value;
692: break;
693:
694: case sAllowTcpForwarding:
695: intptr = &options->allow_tcp_forwarding;
696: goto parse_flag;
1.102 provos 697:
698: case sUsePrivilegeSeparation:
699: intptr = &use_privsep;
700: goto parse_flag;
1.94 markus 701:
702: case sAllowUsers:
703: while ((arg = strdelim(&cp)) && *arg != '\0') {
704: if (options->num_allow_users >= MAX_ALLOW_USERS)
705: fatal("%s line %d: too many allow users.",
706: filename, linenum);
1.112 deraadt 707: options->allow_users[options->num_allow_users++] =
708: xstrdup(arg);
1.94 markus 709: }
710: break;
1.25 markus 711:
1.94 markus 712: case sDenyUsers:
713: while ((arg = strdelim(&cp)) && *arg != '\0') {
714: if (options->num_deny_users >= MAX_DENY_USERS)
715: fatal( "%s line %d: too many deny users.",
716: filename, linenum);
1.112 deraadt 717: options->deny_users[options->num_deny_users++] =
718: xstrdup(arg);
1.94 markus 719: }
720: break;
1.25 markus 721:
1.94 markus 722: case sAllowGroups:
723: while ((arg = strdelim(&cp)) && *arg != '\0') {
724: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
725: fatal("%s line %d: too many allow groups.",
726: filename, linenum);
1.112 deraadt 727: options->allow_groups[options->num_allow_groups++] =
728: xstrdup(arg);
1.94 markus 729: }
730: break;
1.33 markus 731:
1.94 markus 732: case sDenyGroups:
733: while ((arg = strdelim(&cp)) && *arg != '\0') {
734: if (options->num_deny_groups >= MAX_DENY_GROUPS)
735: fatal("%s line %d: too many deny groups.",
736: filename, linenum);
737: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
738: }
739: break;
1.66 markus 740:
1.94 markus 741: case sCiphers:
742: arg = strdelim(&cp);
743: if (!arg || *arg == '\0')
744: fatal("%s line %d: Missing argument.", filename, linenum);
745: if (!ciphers_valid(arg))
746: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
747: filename, linenum, arg ? arg : "<NONE>");
748: if (options->ciphers == NULL)
749: options->ciphers = xstrdup(arg);
750: break;
1.33 markus 751:
1.94 markus 752: case sMacs:
753: arg = strdelim(&cp);
754: if (!arg || *arg == '\0')
755: fatal("%s line %d: Missing argument.", filename, linenum);
756: if (!mac_valid(arg))
757: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
758: filename, linenum, arg ? arg : "<NONE>");
759: if (options->macs == NULL)
760: options->macs = xstrdup(arg);
761: break;
1.43 jakob 762:
1.94 markus 763: case sProtocol:
764: intptr = &options->protocol;
765: arg = strdelim(&cp);
766: if (!arg || *arg == '\0')
767: fatal("%s line %d: Missing argument.", filename, linenum);
768: value = proto_spec(arg);
769: if (value == SSH_PROTO_UNKNOWN)
770: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 771: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 772: if (*intptr == SSH_PROTO_UNKNOWN)
773: *intptr = value;
774: break;
775:
776: case sSubsystem:
777: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
778: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 779: filename, linenum);
1.94 markus 780: }
781: arg = strdelim(&cp);
782: if (!arg || *arg == '\0')
783: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 784: filename, linenum);
1.94 markus 785: for (i = 0; i < options->num_subsystems; i++)
786: if (strcmp(arg, options->subsystem_name[i]) == 0)
787: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 788: filename, linenum, arg);
1.94 markus 789: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
790: arg = strdelim(&cp);
791: if (!arg || *arg == '\0')
792: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 793: filename, linenum);
1.94 markus 794: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
795: options->num_subsystems++;
796: break;
1.46 markus 797:
1.94 markus 798: case sMaxStartups:
799: arg = strdelim(&cp);
800: if (!arg || *arg == '\0')
801: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 802: filename, linenum);
1.94 markus 803: if ((n = sscanf(arg, "%d:%d:%d",
804: &options->max_startups_begin,
805: &options->max_startups_rate,
806: &options->max_startups)) == 3) {
807: if (options->max_startups_begin >
808: options->max_startups ||
809: options->max_startups_rate > 100 ||
810: options->max_startups_rate < 1)
1.50 markus 811: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 812: filename, linenum);
1.94 markus 813: } else if (n != 1)
814: fatal("%s line %d: Illegal MaxStartups spec.",
815: filename, linenum);
816: else
817: options->max_startups = options->max_startups_begin;
818: break;
819:
820: case sBanner:
821: charptr = &options->banner;
822: goto parse_filename;
823: /*
824: * These options can contain %X options expanded at
825: * connect time, so that you can specify paths like:
826: *
827: * AuthorizedKeysFile /etc/ssh_keys/%u
828: */
829: case sAuthorizedKeysFile:
830: case sAuthorizedKeysFile2:
831: charptr = (opcode == sAuthorizedKeysFile ) ?
832: &options->authorized_keys_file :
833: &options->authorized_keys_file2;
834: goto parse_filename;
835:
836: case sClientAliveInterval:
837: intptr = &options->client_alive_interval;
838: goto parse_time;
839:
840: case sClientAliveCountMax:
841: intptr = &options->client_alive_count_max;
842: goto parse_int;
843:
844: case sDeprecated:
1.117 itojun 845: logit("%s line %d: Deprecated option %s",
1.121 jakob 846: filename, linenum, arg);
847: while (arg)
848: arg = strdelim(&cp);
849: break;
850:
851: case sUnsupported:
852: logit("%s line %d: Unsupported option %s",
1.94 markus 853: filename, linenum, arg);
854: while (arg)
855: arg = strdelim(&cp);
856: break;
857:
858: default:
859: fatal("%s line %d: Missing handler for opcode %s (%d)",
860: filename, linenum, arg, opcode);
861: }
862: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
863: fatal("%s line %d: garbage at end of line; \"%.200s\".",
864: filename, linenum, arg);
865: return 0;
866: }
867:
868: /* Reads the server configuration file. */
1.25 markus 869:
1.94 markus 870: void
871: read_server_config(ServerOptions *options, const char *filename)
872: {
1.112 deraadt 873: int linenum, bad_options = 0;
874: char line[1024];
1.94 markus 875: FILE *f;
1.81 stevesk 876:
1.116 markus 877: debug2("read_server_config: filename %s", filename);
1.94 markus 878: f = fopen(filename, "r");
879: if (!f) {
880: perror(filename);
881: exit(1);
882: }
883: linenum = 0;
884: while (fgets(line, sizeof(line), f)) {
885: /* Update line number counter. */
886: linenum++;
887: if (process_server_config_line(options, line, filename, linenum) != 0)
888: bad_options++;
1.1 deraadt 889: }
1.25 markus 890: fclose(f);
1.78 stevesk 891: if (bad_options > 0)
892: fatal("%s: terminating, %d bad configuration options",
893: filename, bad_options);
1.1 deraadt 894: }
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