Annotation of src/usr.bin/ssh/servconf.c, Revision 1.125
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"
1.125 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.124 2003/08/13 08:46:30 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;
59: options->keepalives = -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;
1.85 dugsong 70: options->kerberos_tgt_passing = -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;
153: if (options->keepalives == -1)
154: options->keepalives = 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;
175: if (options->kerberos_tgt_passing == -1)
176: options->kerberos_tgt_passing = 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,
1.123 markus 233: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.52 markus 234: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 235: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 236: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.89 jakob 237: sStrictModes, sEmptyPasswd, sKeepAlives,
1.113 markus 238: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 239: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 240: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 241: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.122 markus 242: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 243: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 244: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.125 ! markus 245: sGssAuthentication, sGssCleanupCreds,
1.105 stevesk 246: sUsePrivilegeSeparation,
1.121 jakob 247: sDeprecated, sUnsupported
1.1 deraadt 248: } ServerOpCodes;
249:
250: /* Textual representation of the tokens. */
1.25 markus 251: static struct {
252: const char *name;
253: ServerOpCodes opcode;
254: } keywords[] = {
255: { "port", sPort },
256: { "hostkey", sHostKeyFile },
1.54 markus 257: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 258: { "pidfile", sPidFile },
1.25 markus 259: { "serverkeybits", sServerKeyBits },
260: { "logingracetime", sLoginGraceTime },
261: { "keyregenerationinterval", sKeyRegenerationTime },
262: { "permitrootlogin", sPermitRootLogin },
263: { "syslogfacility", sLogFacility },
264: { "loglevel", sLogLevel },
1.124 markus 265: { "rhostsauthentication", sDeprecated },
1.25 markus 266: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 267: { "hostbasedauthentication", sHostbasedAuthentication },
268: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 269: { "rsaauthentication", sRSAAuthentication },
1.54 markus 270: { "pubkeyauthentication", sPubkeyAuthentication },
271: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.123 markus 272: #ifdef KRB5
1.25 markus 273: { "kerberosauthentication", sKerberosAuthentication },
274: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
275: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.85 dugsong 276: { "kerberostgtpassing", sKerberosTgtPassing },
1.121 jakob 277: #else
278: { "kerberosauthentication", sUnsupported },
279: { "kerberosorlocalpasswd", sUnsupported },
280: { "kerberosticketcleanup", sUnsupported },
281: { "kerberostgtpassing", sUnsupported },
282: #endif
283: { "afstokenpassing", sUnsupported },
1.125 ! markus 284: #ifdef GSSAPI
! 285: { "gssapiauthentication", sGssAuthentication },
! 286: { "gssapicleanupcreds", sGssCleanupCreds },
! 287: #else
! 288: { "gssapiauthentication", sUnsupported },
! 289: { "gssapicleanupcreds", sUnsupported },
! 290: #endif
1.25 markus 291: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 292: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 293: { "challengeresponseauthentication", sChallengeResponseAuthentication },
294: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 295: { "checkmail", sDeprecated },
1.25 markus 296: { "listenaddress", sListenAddress },
297: { "printmotd", sPrintMotd },
1.72 stevesk 298: { "printlastlog", sPrintLastLog },
1.25 markus 299: { "ignorerhosts", sIgnoreRhosts },
300: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
301: { "x11forwarding", sX11Forwarding },
302: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 303: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 304: { "xauthlocation", sXAuthLocation },
1.25 markus 305: { "strictmodes", sStrictModes },
306: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 307: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 308: { "uselogin", sUseLogin },
1.111 markus 309: { "compression", sCompression },
1.25 markus 310: { "keepalive", sKeepAlives },
1.53 markus 311: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 312: { "allowusers", sAllowUsers },
313: { "denyusers", sDenyUsers },
314: { "allowgroups", sAllowGroups },
315: { "denygroups", sDenyGroups },
1.33 markus 316: { "ciphers", sCiphers },
1.66 markus 317: { "macs", sMacs },
1.33 markus 318: { "protocol", sProtocol },
1.38 markus 319: { "gatewayports", sGatewayPorts },
1.43 jakob 320: { "subsystem", sSubsystem },
1.46 markus 321: { "maxstartups", sMaxStartups },
1.57 markus 322: { "banner", sBanner },
1.122 markus 323: { "usedns", sUseDNS },
324: { "verifyreversemapping", sDeprecated },
325: { "reversemappingcheck", sDeprecated },
1.77 beck 326: { "clientaliveinterval", sClientAliveInterval },
327: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 328: { "authorizedkeysfile", sAuthorizedKeysFile },
329: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 330: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.92 stevesk 331: { NULL, sBadOption }
1.1 deraadt 332: };
333:
1.27 markus 334: /*
1.73 stevesk 335: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 336: */
1.1 deraadt 337:
1.34 markus 338: static ServerOpCodes
1.25 markus 339: parse_token(const char *cp, const char *filename,
340: int linenum)
1.1 deraadt 341: {
1.55 markus 342: u_int i;
1.1 deraadt 343:
1.25 markus 344: for (i = 0; keywords[i].name; i++)
1.28 markus 345: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 346: return keywords[i].opcode;
347:
1.78 stevesk 348: error("%s: line %d: Bad configuration option: %s",
349: filename, linenum, cp);
1.25 markus 350: return sBadOption;
1.1 deraadt 351: }
352:
1.84 itojun 353: static void
1.76 stevesk 354: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 355: {
356: int i;
357:
358: if (options->num_ports == 0)
359: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 360: if (port == 0)
1.74 stevesk 361: for (i = 0; i < options->num_ports; i++)
362: add_one_listen_addr(options, addr, options->ports[i]);
363: else
1.76 stevesk 364: add_one_listen_addr(options, addr, port);
1.74 stevesk 365: }
366:
1.84 itojun 367: static void
1.74 stevesk 368: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 369: {
370: struct addrinfo hints, *ai, *aitop;
371: char strport[NI_MAXSERV];
372: int gaierr;
373:
1.74 stevesk 374: memset(&hints, 0, sizeof(hints));
375: hints.ai_family = IPv4or6;
376: hints.ai_socktype = SOCK_STREAM;
377: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 378: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 379: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
380: fatal("bad addr or host: %s (%s)",
381: addr ? addr : "<NULL>",
382: gai_strerror(gaierr));
383: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
384: ;
385: ai->ai_next = options->listen_addrs;
386: options->listen_addrs = aitop;
1.29 markus 387: }
388:
1.94 markus 389: int
390: process_server_config_line(ServerOptions *options, char *line,
391: const char *filename, int linenum)
1.1 deraadt 392: {
1.74 stevesk 393: char *cp, **charptr, *arg, *p;
1.112 deraadt 394: int *intptr, value, i, n;
1.25 markus 395: ServerOpCodes opcode;
396:
1.94 markus 397: cp = line;
398: arg = strdelim(&cp);
399: /* Ignore leading whitespace */
400: if (*arg == '\0')
401: arg = strdelim(&cp);
402: if (!arg || !*arg || *arg == '#')
403: return 0;
404: intptr = NULL;
405: charptr = NULL;
406: opcode = parse_token(arg, filename, linenum);
407: switch (opcode) {
408: case sBadOption:
409: return -1;
410: case sPort:
411: /* ignore ports from configfile if cmdline specifies ports */
412: if (options->ports_from_cmdline)
413: return 0;
414: if (options->listen_addrs != NULL)
415: fatal("%s line %d: ports must be specified before "
1.98 stevesk 416: "ListenAddress.", filename, linenum);
1.94 markus 417: if (options->num_ports >= MAX_PORTS)
418: fatal("%s line %d: too many ports.",
419: filename, linenum);
1.48 provos 420: arg = strdelim(&cp);
1.94 markus 421: if (!arg || *arg == '\0')
422: fatal("%s line %d: missing port number.",
423: filename, linenum);
424: options->ports[options->num_ports++] = a2port(arg);
425: if (options->ports[options->num_ports-1] == 0)
426: fatal("%s line %d: Badly formatted port number.",
427: filename, linenum);
428: break;
1.29 markus 429:
1.94 markus 430: case sServerKeyBits:
431: intptr = &options->server_key_bits;
1.25 markus 432: parse_int:
1.94 markus 433: arg = strdelim(&cp);
434: if (!arg || *arg == '\0')
435: fatal("%s line %d: missing integer value.",
436: filename, linenum);
437: value = atoi(arg);
438: if (*intptr == -1)
439: *intptr = value;
440: break;
1.25 markus 441:
1.94 markus 442: case sLoginGraceTime:
443: intptr = &options->login_grace_time;
1.81 stevesk 444: parse_time:
1.94 markus 445: arg = strdelim(&cp);
446: if (!arg || *arg == '\0')
447: fatal("%s line %d: missing time value.",
448: filename, linenum);
449: if ((value = convtime(arg)) == -1)
450: fatal("%s line %d: invalid time value.",
451: filename, linenum);
452: if (*intptr == -1)
453: *intptr = value;
454: break;
455:
456: case sKeyRegenerationTime:
457: intptr = &options->key_regeneration_time;
458: goto parse_time;
459:
460: case sListenAddress:
461: arg = strdelim(&cp);
462: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
463: fatal("%s line %d: missing inet addr.",
464: filename, linenum);
465: if (*arg == '[') {
466: if ((p = strchr(arg, ']')) == NULL)
467: fatal("%s line %d: bad ipv6 inet addr usage.",
468: filename, linenum);
469: arg++;
470: memmove(p, p+1, strlen(p+1)+1);
471: } else if (((p = strchr(arg, ':')) == NULL) ||
472: (strchr(p+1, ':') != NULL)) {
473: add_listen_addr(options, arg, 0);
1.81 stevesk 474: break;
1.94 markus 475: }
476: if (*p == ':') {
477: u_short port;
1.25 markus 478:
1.94 markus 479: p++;
480: if (*p == '\0')
481: fatal("%s line %d: bad inet addr:port usage.",
482: filename, linenum);
483: else {
484: *(p-1) = '\0';
485: if ((port = a2port(p)) == 0)
486: fatal("%s line %d: bad port number.",
1.74 stevesk 487: filename, linenum);
1.94 markus 488: add_listen_addr(options, arg, port);
1.74 stevesk 489: }
1.94 markus 490: } else if (*p == '\0')
491: add_listen_addr(options, arg, 0);
492: else
493: fatal("%s line %d: bad inet addr usage.",
494: filename, linenum);
495: break;
496:
497: case sHostKeyFile:
498: intptr = &options->num_host_key_files;
499: if (*intptr >= MAX_HOSTKEYS)
500: fatal("%s line %d: too many host keys specified (max %d).",
501: filename, linenum, MAX_HOSTKEYS);
502: charptr = &options->host_key_files[*intptr];
503: parse_filename:
504: arg = strdelim(&cp);
505: if (!arg || *arg == '\0')
506: fatal("%s line %d: missing file name.",
507: filename, linenum);
508: if (*charptr == NULL) {
509: *charptr = tilde_expand_filename(arg, getuid());
510: /* increase optional counter */
511: if (intptr != NULL)
512: *intptr = *intptr + 1;
513: }
514: break;
1.76 stevesk 515:
1.94 markus 516: case sPidFile:
517: charptr = &options->pid_file;
518: goto parse_filename;
1.25 markus 519:
1.94 markus 520: case sPermitRootLogin:
521: intptr = &options->permit_root_login;
522: arg = strdelim(&cp);
523: if (!arg || *arg == '\0')
524: fatal("%s line %d: missing yes/"
525: "without-password/forced-commands-only/no "
526: "argument.", filename, linenum);
527: value = 0; /* silence compiler */
528: if (strcmp(arg, "without-password") == 0)
529: value = PERMIT_NO_PASSWD;
530: else if (strcmp(arg, "forced-commands-only") == 0)
531: value = PERMIT_FORCED_ONLY;
532: else if (strcmp(arg, "yes") == 0)
533: value = PERMIT_YES;
534: else if (strcmp(arg, "no") == 0)
535: value = PERMIT_NO;
536: else
537: fatal("%s line %d: Bad yes/"
538: "without-password/forced-commands-only/no "
539: "argument: %s", filename, linenum, arg);
540: if (*intptr == -1)
541: *intptr = value;
542: break;
1.36 markus 543:
1.94 markus 544: case sIgnoreRhosts:
545: intptr = &options->ignore_rhosts;
1.25 markus 546: parse_flag:
1.94 markus 547: arg = strdelim(&cp);
548: if (!arg || *arg == '\0')
549: fatal("%s line %d: missing yes/no argument.",
550: filename, linenum);
551: value = 0; /* silence compiler */
552: if (strcmp(arg, "yes") == 0)
553: value = 1;
554: else if (strcmp(arg, "no") == 0)
555: value = 0;
556: else
557: fatal("%s line %d: Bad yes/no argument: %s",
558: filename, linenum, arg);
559: if (*intptr == -1)
560: *intptr = value;
561: break;
562:
563: case sIgnoreUserKnownHosts:
564: intptr = &options->ignore_user_known_hosts;
565: goto parse_flag;
566:
567: case sRhostsRSAAuthentication:
568: intptr = &options->rhosts_rsa_authentication;
569: goto parse_flag;
570:
571: case sHostbasedAuthentication:
572: intptr = &options->hostbased_authentication;
573: goto parse_flag;
574:
575: case sHostbasedUsesNameFromPacketOnly:
576: intptr = &options->hostbased_uses_name_from_packet_only;
577: goto parse_flag;
578:
579: case sRSAAuthentication:
580: intptr = &options->rsa_authentication;
581: goto parse_flag;
582:
583: case sPubkeyAuthentication:
584: intptr = &options->pubkey_authentication;
585: goto parse_flag;
1.119 jakob 586:
1.94 markus 587: case sKerberosAuthentication:
588: intptr = &options->kerberos_authentication;
589: goto parse_flag;
590:
591: case sKerberosOrLocalPasswd:
592: intptr = &options->kerberos_or_local_passwd;
593: goto parse_flag;
594:
595: case sKerberosTicketCleanup:
596: intptr = &options->kerberos_ticket_cleanup;
597: goto parse_flag;
1.119 jakob 598:
1.94 markus 599: case sKerberosTgtPassing:
600: intptr = &options->kerberos_tgt_passing;
1.125 ! markus 601: goto parse_flag;
! 602:
! 603: case sGssAuthentication:
! 604: intptr = &options->gss_authentication;
! 605: goto parse_flag;
! 606:
! 607: case sGssCleanupCreds:
! 608: intptr = &options->gss_cleanup_creds;
1.94 markus 609: goto parse_flag;
610:
611: case sPasswordAuthentication:
612: intptr = &options->password_authentication;
613: goto parse_flag;
614:
615: case sKbdInteractiveAuthentication:
616: intptr = &options->kbd_interactive_authentication;
617: goto parse_flag;
618:
619: case sChallengeResponseAuthentication:
620: intptr = &options->challenge_response_authentication;
621: goto parse_flag;
622:
623: case sPrintMotd:
624: intptr = &options->print_motd;
625: goto parse_flag;
626:
627: case sPrintLastLog:
628: intptr = &options->print_lastlog;
629: goto parse_flag;
630:
631: case sX11Forwarding:
632: intptr = &options->x11_forwarding;
633: goto parse_flag;
634:
635: case sX11DisplayOffset:
636: intptr = &options->x11_display_offset;
637: goto parse_int;
1.99 stevesk 638:
639: case sX11UseLocalhost:
640: intptr = &options->x11_use_localhost;
641: goto parse_flag;
1.94 markus 642:
643: case sXAuthLocation:
644: charptr = &options->xauth_location;
645: goto parse_filename;
646:
647: case sStrictModes:
648: intptr = &options->strict_modes;
649: goto parse_flag;
650:
651: case sKeepAlives:
652: intptr = &options->keepalives;
653: goto parse_flag;
654:
655: case sEmptyPasswd:
656: intptr = &options->permit_empty_passwd;
1.113 markus 657: goto parse_flag;
658:
659: case sPermitUserEnvironment:
660: intptr = &options->permit_user_env;
1.94 markus 661: goto parse_flag;
662:
663: case sUseLogin:
664: intptr = &options->use_login;
1.111 markus 665: goto parse_flag;
666:
667: case sCompression:
668: intptr = &options->compression;
1.94 markus 669: goto parse_flag;
670:
671: case sGatewayPorts:
672: intptr = &options->gateway_ports;
673: goto parse_flag;
1.25 markus 674:
1.122 markus 675: case sUseDNS:
676: intptr = &options->use_dns;
1.94 markus 677: goto parse_flag;
1.53 markus 678:
1.94 markus 679: case sLogFacility:
680: intptr = (int *) &options->log_facility;
681: arg = strdelim(&cp);
682: value = log_facility_number(arg);
1.101 markus 683: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 684: fatal("%.200s line %d: unsupported log facility '%s'",
685: filename, linenum, arg ? arg : "<NONE>");
686: if (*intptr == -1)
687: *intptr = (SyslogFacility) value;
688: break;
1.25 markus 689:
1.94 markus 690: case sLogLevel:
691: intptr = (int *) &options->log_level;
692: arg = strdelim(&cp);
693: value = log_level_number(arg);
1.101 markus 694: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 695: fatal("%.200s line %d: unsupported log level '%s'",
696: filename, linenum, arg ? arg : "<NONE>");
697: if (*intptr == -1)
698: *intptr = (LogLevel) value;
699: break;
700:
701: case sAllowTcpForwarding:
702: intptr = &options->allow_tcp_forwarding;
703: goto parse_flag;
1.102 provos 704:
705: case sUsePrivilegeSeparation:
706: intptr = &use_privsep;
707: goto parse_flag;
1.94 markus 708:
709: case sAllowUsers:
710: while ((arg = strdelim(&cp)) && *arg != '\0') {
711: if (options->num_allow_users >= MAX_ALLOW_USERS)
712: fatal("%s line %d: too many allow users.",
713: filename, linenum);
1.112 deraadt 714: options->allow_users[options->num_allow_users++] =
715: xstrdup(arg);
1.94 markus 716: }
717: break;
1.25 markus 718:
1.94 markus 719: case sDenyUsers:
720: while ((arg = strdelim(&cp)) && *arg != '\0') {
721: if (options->num_deny_users >= MAX_DENY_USERS)
722: fatal( "%s line %d: too many deny users.",
723: filename, linenum);
1.112 deraadt 724: options->deny_users[options->num_deny_users++] =
725: xstrdup(arg);
1.94 markus 726: }
727: break;
1.25 markus 728:
1.94 markus 729: case sAllowGroups:
730: while ((arg = strdelim(&cp)) && *arg != '\0') {
731: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
732: fatal("%s line %d: too many allow groups.",
733: filename, linenum);
1.112 deraadt 734: options->allow_groups[options->num_allow_groups++] =
735: xstrdup(arg);
1.94 markus 736: }
737: break;
1.33 markus 738:
1.94 markus 739: case sDenyGroups:
740: while ((arg = strdelim(&cp)) && *arg != '\0') {
741: if (options->num_deny_groups >= MAX_DENY_GROUPS)
742: fatal("%s line %d: too many deny groups.",
743: filename, linenum);
744: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
745: }
746: break;
1.66 markus 747:
1.94 markus 748: case sCiphers:
749: arg = strdelim(&cp);
750: if (!arg || *arg == '\0')
751: fatal("%s line %d: Missing argument.", filename, linenum);
752: if (!ciphers_valid(arg))
753: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
754: filename, linenum, arg ? arg : "<NONE>");
755: if (options->ciphers == NULL)
756: options->ciphers = xstrdup(arg);
757: break;
1.33 markus 758:
1.94 markus 759: case sMacs:
760: arg = strdelim(&cp);
761: if (!arg || *arg == '\0')
762: fatal("%s line %d: Missing argument.", filename, linenum);
763: if (!mac_valid(arg))
764: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
765: filename, linenum, arg ? arg : "<NONE>");
766: if (options->macs == NULL)
767: options->macs = xstrdup(arg);
768: break;
1.43 jakob 769:
1.94 markus 770: case sProtocol:
771: intptr = &options->protocol;
772: arg = strdelim(&cp);
773: if (!arg || *arg == '\0')
774: fatal("%s line %d: Missing argument.", filename, linenum);
775: value = proto_spec(arg);
776: if (value == SSH_PROTO_UNKNOWN)
777: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 778: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 779: if (*intptr == SSH_PROTO_UNKNOWN)
780: *intptr = value;
781: break;
782:
783: case sSubsystem:
784: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
785: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 786: filename, linenum);
1.94 markus 787: }
788: arg = strdelim(&cp);
789: if (!arg || *arg == '\0')
790: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 791: filename, linenum);
1.94 markus 792: for (i = 0; i < options->num_subsystems; i++)
793: if (strcmp(arg, options->subsystem_name[i]) == 0)
794: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 795: filename, linenum, arg);
1.94 markus 796: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
797: arg = strdelim(&cp);
798: if (!arg || *arg == '\0')
799: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 800: filename, linenum);
1.94 markus 801: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
802: options->num_subsystems++;
803: break;
1.46 markus 804:
1.94 markus 805: case sMaxStartups:
806: arg = strdelim(&cp);
807: if (!arg || *arg == '\0')
808: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 809: filename, linenum);
1.94 markus 810: if ((n = sscanf(arg, "%d:%d:%d",
811: &options->max_startups_begin,
812: &options->max_startups_rate,
813: &options->max_startups)) == 3) {
814: if (options->max_startups_begin >
815: options->max_startups ||
816: options->max_startups_rate > 100 ||
817: options->max_startups_rate < 1)
1.50 markus 818: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 819: filename, linenum);
1.94 markus 820: } else if (n != 1)
821: fatal("%s line %d: Illegal MaxStartups spec.",
822: filename, linenum);
823: else
824: options->max_startups = options->max_startups_begin;
825: break;
826:
827: case sBanner:
828: charptr = &options->banner;
829: goto parse_filename;
830: /*
831: * These options can contain %X options expanded at
832: * connect time, so that you can specify paths like:
833: *
834: * AuthorizedKeysFile /etc/ssh_keys/%u
835: */
836: case sAuthorizedKeysFile:
837: case sAuthorizedKeysFile2:
838: charptr = (opcode == sAuthorizedKeysFile ) ?
839: &options->authorized_keys_file :
840: &options->authorized_keys_file2;
841: goto parse_filename;
842:
843: case sClientAliveInterval:
844: intptr = &options->client_alive_interval;
845: goto parse_time;
846:
847: case sClientAliveCountMax:
848: intptr = &options->client_alive_count_max;
849: goto parse_int;
850:
851: case sDeprecated:
1.117 itojun 852: logit("%s line %d: Deprecated option %s",
1.121 jakob 853: filename, linenum, arg);
854: while (arg)
855: arg = strdelim(&cp);
856: break;
857:
858: case sUnsupported:
859: logit("%s line %d: Unsupported option %s",
1.94 markus 860: filename, linenum, arg);
861: while (arg)
862: arg = strdelim(&cp);
863: break;
864:
865: default:
866: fatal("%s line %d: Missing handler for opcode %s (%d)",
867: filename, linenum, arg, opcode);
868: }
869: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
870: fatal("%s line %d: garbage at end of line; \"%.200s\".",
871: filename, linenum, arg);
872: return 0;
873: }
874:
875: /* Reads the server configuration file. */
1.25 markus 876:
1.94 markus 877: void
878: read_server_config(ServerOptions *options, const char *filename)
879: {
1.112 deraadt 880: int linenum, bad_options = 0;
881: char line[1024];
1.94 markus 882: FILE *f;
1.81 stevesk 883:
1.116 markus 884: debug2("read_server_config: filename %s", filename);
1.94 markus 885: f = fopen(filename, "r");
886: if (!f) {
887: perror(filename);
888: exit(1);
889: }
890: linenum = 0;
891: while (fgets(line, sizeof(line), f)) {
892: /* Update line number counter. */
893: linenum++;
894: if (process_server_config_line(options, line, filename, linenum) != 0)
895: bad_options++;
1.1 deraadt 896: }
1.25 markus 897: fclose(f);
1.78 stevesk 898: if (bad_options > 0)
899: fatal("%s: terminating, %d bad configuration options",
900: filename, bad_options);
1.1 deraadt 901: }
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