Annotation of src/usr.bin/ssh/servconf.c, Revision 1.127.2.1
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"
1.127.2.1! brad 13: RCSID("$OpenBSD: servconf.c,v 1.130 2003/12/23 16:12:10 jakob 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;
1.127.2.1! brad 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;
1.127.2.1! brad 70: options->kerberos_get_afs_token = -1;
1.125 markus 71: options->gss_authentication=-1;
72: options->gss_cleanup_creds = -1;
1.25 markus 73: options->password_authentication = -1;
1.52 markus 74: options->kbd_interactive_authentication = -1;
1.80 markus 75: options->challenge_response_authentication = -1;
1.25 markus 76: options->permit_empty_passwd = -1;
1.113 markus 77: options->permit_user_env = -1;
1.25 markus 78: options->use_login = -1;
1.111 markus 79: options->compression = -1;
1.53 markus 80: options->allow_tcp_forwarding = -1;
1.25 markus 81: options->num_allow_users = 0;
82: options->num_deny_users = 0;
83: options->num_allow_groups = 0;
84: options->num_deny_groups = 0;
1.33 markus 85: options->ciphers = NULL;
1.66 markus 86: options->macs = NULL;
1.33 markus 87: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 88: options->gateway_ports = -1;
1.43 jakob 89: options->num_subsystems = 0;
1.50 markus 90: options->max_startups_begin = -1;
91: options->max_startups_rate = -1;
1.46 markus 92: options->max_startups = -1;
1.57 markus 93: options->banner = NULL;
1.122 markus 94: options->use_dns = -1;
1.77 beck 95: options->client_alive_interval = -1;
96: options->client_alive_count_max = -1;
1.82 markus 97: options->authorized_keys_file = NULL;
98: options->authorized_keys_file2 = NULL;
1.102 provos 99:
100: /* Needs to be accessable in many places */
101: use_privsep = -1;
1.1 deraadt 102: }
103:
1.34 markus 104: void
1.25 markus 105: fill_default_server_options(ServerOptions *options)
1.1 deraadt 106: {
1.54 markus 107: if (options->protocol == SSH_PROTO_UNKNOWN)
108: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
109: if (options->num_host_key_files == 0) {
110: /* fill default hostkeys for protocols */
111: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 112: options->host_key_files[options->num_host_key_files++] =
113: _PATH_HOST_KEY_FILE;
114: if (options->protocol & SSH_PROTO_2) {
115: options->host_key_files[options->num_host_key_files++] =
116: _PATH_HOST_RSA_KEY_FILE;
117: options->host_key_files[options->num_host_key_files++] =
118: _PATH_HOST_DSA_KEY_FILE;
119: }
1.54 markus 120: }
1.29 markus 121: if (options->num_ports == 0)
122: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
123: if (options->listen_addrs == NULL)
1.76 stevesk 124: add_listen_addr(options, NULL, 0);
1.36 markus 125: if (options->pid_file == NULL)
1.60 markus 126: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 127: if (options->server_key_bits == -1)
128: options->server_key_bits = 768;
129: if (options->login_grace_time == -1)
1.115 stevesk 130: options->login_grace_time = 120;
1.25 markus 131: if (options->key_regeneration_time == -1)
132: options->key_regeneration_time = 3600;
1.67 markus 133: if (options->permit_root_login == PERMIT_NOT_SET)
134: options->permit_root_login = PERMIT_YES;
1.25 markus 135: if (options->ignore_rhosts == -1)
1.30 markus 136: options->ignore_rhosts = 1;
1.25 markus 137: if (options->ignore_user_known_hosts == -1)
138: options->ignore_user_known_hosts = 0;
139: if (options->print_motd == -1)
140: options->print_motd = 1;
1.72 stevesk 141: if (options->print_lastlog == -1)
142: options->print_lastlog = 1;
1.25 markus 143: if (options->x11_forwarding == -1)
1.30 markus 144: options->x11_forwarding = 0;
1.25 markus 145: if (options->x11_display_offset == -1)
1.30 markus 146: options->x11_display_offset = 10;
1.99 stevesk 147: if (options->x11_use_localhost == -1)
148: options->x11_use_localhost = 1;
1.42 markus 149: if (options->xauth_location == NULL)
1.83 markus 150: options->xauth_location = _PATH_XAUTH;
1.25 markus 151: if (options->strict_modes == -1)
152: options->strict_modes = 1;
1.127.2.1! brad 153: if (options->tcp_keep_alive == -1)
! 154: options->tcp_keep_alive = 1;
1.101 markus 155: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 156: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 157: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 158: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 159: if (options->rhosts_rsa_authentication == -1)
1.30 markus 160: options->rhosts_rsa_authentication = 0;
1.75 markus 161: if (options->hostbased_authentication == -1)
162: options->hostbased_authentication = 0;
163: if (options->hostbased_uses_name_from_packet_only == -1)
164: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 165: if (options->rsa_authentication == -1)
166: options->rsa_authentication = 1;
1.54 markus 167: if (options->pubkey_authentication == -1)
168: options->pubkey_authentication = 1;
1.25 markus 169: if (options->kerberos_authentication == -1)
1.107 markus 170: options->kerberos_authentication = 0;
1.25 markus 171: if (options->kerberos_or_local_passwd == -1)
172: options->kerberos_or_local_passwd = 1;
173: if (options->kerberos_ticket_cleanup == -1)
174: options->kerberos_ticket_cleanup = 1;
1.127.2.1! brad 175: if (options->kerberos_get_afs_token == -1)
! 176: options->kerberos_get_afs_token = 0;
1.125 markus 177: if (options->gss_authentication == -1)
178: options->gss_authentication = 0;
179: if (options->gss_cleanup_creds == -1)
180: options->gss_cleanup_creds = 1;
1.25 markus 181: if (options->password_authentication == -1)
182: options->password_authentication = 1;
1.52 markus 183: if (options->kbd_interactive_authentication == -1)
184: options->kbd_interactive_authentication = 0;
1.80 markus 185: if (options->challenge_response_authentication == -1)
186: options->challenge_response_authentication = 1;
1.25 markus 187: if (options->permit_empty_passwd == -1)
1.30 markus 188: options->permit_empty_passwd = 0;
1.113 markus 189: if (options->permit_user_env == -1)
190: options->permit_user_env = 0;
1.25 markus 191: if (options->use_login == -1)
192: options->use_login = 0;
1.111 markus 193: if (options->compression == -1)
194: options->compression = 1;
1.53 markus 195: if (options->allow_tcp_forwarding == -1)
196: options->allow_tcp_forwarding = 1;
1.38 markus 197: if (options->gateway_ports == -1)
198: options->gateway_ports = 0;
1.46 markus 199: if (options->max_startups == -1)
200: options->max_startups = 10;
1.50 markus 201: if (options->max_startups_rate == -1)
202: options->max_startups_rate = 100; /* 100% */
203: if (options->max_startups_begin == -1)
204: options->max_startups_begin = options->max_startups;
1.122 markus 205: if (options->use_dns == -1)
206: options->use_dns = 1;
1.77 beck 207: if (options->client_alive_interval == -1)
1.95 deraadt 208: options->client_alive_interval = 0;
1.77 beck 209: if (options->client_alive_count_max == -1)
210: options->client_alive_count_max = 3;
1.90 markus 211: if (options->authorized_keys_file2 == NULL) {
212: /* authorized_keys_file2 falls back to authorized_keys_file */
213: if (options->authorized_keys_file != NULL)
214: options->authorized_keys_file2 = options->authorized_keys_file;
215: else
216: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
217: }
218: if (options->authorized_keys_file == NULL)
219: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.102 provos 220:
1.110 markus 221: /* Turn privilege separation on by default */
1.102 provos 222: if (use_privsep == -1)
1.110 markus 223: use_privsep = 1;
1.1 deraadt 224: }
225:
226: /* Keyword tokens. */
1.25 markus 227: typedef enum {
228: sBadOption, /* == unknown option */
229: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
230: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 231: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 232: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.127.2.1! brad 233: sKerberosGetAFSToken,
1.123 markus 234: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.52 markus 235: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 236: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 237: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.127.2.1! brad 238: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 239: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 240: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 241: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 242: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.122 markus 243: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 244: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 245: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.125 markus 246: sGssAuthentication, sGssCleanupCreds,
1.105 stevesk 247: sUsePrivilegeSeparation,
1.121 jakob 248: sDeprecated, sUnsupported
1.1 deraadt 249: } ServerOpCodes;
250:
251: /* Textual representation of the tokens. */
1.25 markus 252: static struct {
253: const char *name;
254: ServerOpCodes opcode;
255: } keywords[] = {
256: { "port", sPort },
257: { "hostkey", sHostKeyFile },
1.54 markus 258: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 259: { "pidfile", sPidFile },
1.25 markus 260: { "serverkeybits", sServerKeyBits },
261: { "logingracetime", sLoginGraceTime },
262: { "keyregenerationinterval", sKeyRegenerationTime },
263: { "permitrootlogin", sPermitRootLogin },
264: { "syslogfacility", sLogFacility },
265: { "loglevel", sLogLevel },
1.124 markus 266: { "rhostsauthentication", sDeprecated },
1.25 markus 267: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 268: { "hostbasedauthentication", sHostbasedAuthentication },
269: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 270: { "rsaauthentication", sRSAAuthentication },
1.54 markus 271: { "pubkeyauthentication", sPubkeyAuthentication },
272: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.123 markus 273: #ifdef KRB5
1.25 markus 274: { "kerberosauthentication", sKerberosAuthentication },
275: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
276: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.127.2.1! brad 277: { "kerberosgetafstoken", sKerberosGetAFSToken },
1.121 jakob 278: #else
279: { "kerberosauthentication", sUnsupported },
280: { "kerberosorlocalpasswd", sUnsupported },
281: { "kerberosticketcleanup", sUnsupported },
1.127.2.1! brad 282: { "kerberosgetafstoken", sUnsupported },
1.126 markus 283: #endif
1.121 jakob 284: { "kerberostgtpassing", sUnsupported },
285: { "afstokenpassing", sUnsupported },
1.125 markus 286: #ifdef GSSAPI
287: { "gssapiauthentication", sGssAuthentication },
1.127.2.1! brad 288: { "gssapicleanupcredentials", sGssCleanupCreds },
1.125 markus 289: #else
290: { "gssapiauthentication", sUnsupported },
1.127.2.1! brad 291: { "gssapicleanupcredentials", sUnsupported },
1.125 markus 292: #endif
1.25 markus 293: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 294: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 295: { "challengeresponseauthentication", sChallengeResponseAuthentication },
296: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 297: { "checkmail", sDeprecated },
1.25 markus 298: { "listenaddress", sListenAddress },
299: { "printmotd", sPrintMotd },
1.72 stevesk 300: { "printlastlog", sPrintLastLog },
1.25 markus 301: { "ignorerhosts", sIgnoreRhosts },
302: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
303: { "x11forwarding", sX11Forwarding },
304: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 305: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 306: { "xauthlocation", sXAuthLocation },
1.25 markus 307: { "strictmodes", sStrictModes },
308: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 309: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 310: { "uselogin", sUseLogin },
1.111 markus 311: { "compression", sCompression },
1.127.2.1! brad 312: { "tcpkeepalive", sTCPKeepAlive },
! 313: { "keepalive", sTCPKeepAlive }, /* obsolete alias */
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 sRhostsRSAAuthentication:
571: intptr = &options->rhosts_rsa_authentication;
572: goto parse_flag;
573:
574: case sHostbasedAuthentication:
575: intptr = &options->hostbased_authentication;
576: goto parse_flag;
577:
578: case sHostbasedUsesNameFromPacketOnly:
579: intptr = &options->hostbased_uses_name_from_packet_only;
580: goto parse_flag;
581:
582: case sRSAAuthentication:
583: intptr = &options->rsa_authentication;
584: goto parse_flag;
585:
586: case sPubkeyAuthentication:
587: intptr = &options->pubkey_authentication;
588: goto parse_flag;
1.119 jakob 589:
1.94 markus 590: case sKerberosAuthentication:
591: intptr = &options->kerberos_authentication;
592: goto parse_flag;
593:
594: case sKerberosOrLocalPasswd:
595: intptr = &options->kerberos_or_local_passwd;
596: goto parse_flag;
597:
598: case sKerberosTicketCleanup:
599: intptr = &options->kerberos_ticket_cleanup;
1.125 markus 600: goto parse_flag;
601:
1.127.2.1! brad 602: case sKerberosGetAFSToken:
! 603: intptr = &options->kerberos_get_afs_token;
! 604: goto parse_flag;
! 605:
1.125 markus 606: case sGssAuthentication:
607: intptr = &options->gss_authentication;
608: goto parse_flag;
609:
610: case sGssCleanupCreds:
611: intptr = &options->gss_cleanup_creds;
1.94 markus 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:
1.127.2.1! brad 654: case sTCPKeepAlive:
! 655: intptr = &options->tcp_keep_alive;
1.94 markus 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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