Annotation of src/usr.bin/ssh/servconf.c, Revision 1.132
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"
1.132 ! deraadt 13: RCSID("$OpenBSD: servconf.c,v 1.131 2004/04/27 09:46:37 djm 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 "misc.h"
22: #include "cipher.h"
1.66 markus 23: #include "kex.h"
24: #include "mac.h"
1.1 deraadt 25:
1.84 itojun 26: static void add_listen_addr(ServerOptions *, char *, u_short);
27: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 28:
1.62 markus 29: /* AF_UNSPEC or AF_INET or AF_INET6 */
30: extern int IPv4or6;
1.102 provos 31: /* Use of privilege separation or not */
32: extern int use_privsep;
1.62 markus 33:
1.1 deraadt 34: /* Initializes the server options to their default values. */
35:
1.34 markus 36: void
1.25 markus 37: initialize_server_options(ServerOptions *options)
1.1 deraadt 38: {
1.25 markus 39: memset(options, 0, sizeof(*options));
1.29 markus 40: options->num_ports = 0;
41: options->ports_from_cmdline = 0;
42: options->listen_addrs = NULL;
1.54 markus 43: options->num_host_key_files = 0;
1.36 markus 44: options->pid_file = NULL;
1.25 markus 45: options->server_key_bits = -1;
46: options->login_grace_time = -1;
47: options->key_regeneration_time = -1;
1.67 markus 48: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 49: options->ignore_rhosts = -1;
50: options->ignore_user_known_hosts = -1;
51: options->print_motd = -1;
1.72 stevesk 52: options->print_lastlog = -1;
1.25 markus 53: options->x11_forwarding = -1;
54: options->x11_display_offset = -1;
1.99 stevesk 55: options->x11_use_localhost = -1;
1.42 markus 56: options->xauth_location = NULL;
1.25 markus 57: options->strict_modes = -1;
1.129 markus 58: options->tcp_keep_alive = -1;
1.101 markus 59: options->log_facility = SYSLOG_FACILITY_NOT_SET;
60: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 61: options->rhosts_rsa_authentication = -1;
1.75 markus 62: options->hostbased_authentication = -1;
63: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 64: options->rsa_authentication = -1;
1.54 markus 65: options->pubkey_authentication = -1;
1.25 markus 66: options->kerberos_authentication = -1;
67: options->kerberos_or_local_passwd = -1;
68: options->kerberos_ticket_cleanup = -1;
1.130 jakob 69: options->kerberos_get_afs_token = -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;
1.131 djm 98: options->num_accept_env = 0;
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;
1.129 markus 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;
1.130 jakob 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,
1.130 jakob 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,
1.129 markus 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,
1.131 djm 246: sGssAuthentication, sGssCleanupCreds, sAcceptEnv,
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 },
1.130 jakob 277: { "kerberosgetafstoken", sKerberosGetAFSToken },
1.121 jakob 278: #else
279: { "kerberosauthentication", sUnsupported },
280: { "kerberosorlocalpasswd", sUnsupported },
281: { "kerberosticketcleanup", sUnsupported },
1.130 jakob 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 },
1.128 markus 288: { "gssapicleanupcredentials", sGssCleanupCreds },
1.125 markus 289: #else
290: { "gssapiauthentication", sUnsupported },
1.128 markus 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 },
1.129 markus 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},
1.131 djm 334: { "acceptenv", sAcceptEnv },
1.92 stevesk 335: { NULL, sBadOption }
1.1 deraadt 336: };
337:
1.27 markus 338: /*
1.73 stevesk 339: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 340: */
1.1 deraadt 341:
1.34 markus 342: static ServerOpCodes
1.25 markus 343: parse_token(const char *cp, const char *filename,
344: int linenum)
1.1 deraadt 345: {
1.55 markus 346: u_int i;
1.1 deraadt 347:
1.25 markus 348: for (i = 0; keywords[i].name; i++)
1.28 markus 349: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 350: return keywords[i].opcode;
351:
1.78 stevesk 352: error("%s: line %d: Bad configuration option: %s",
353: filename, linenum, cp);
1.25 markus 354: return sBadOption;
1.1 deraadt 355: }
356:
1.84 itojun 357: static void
1.76 stevesk 358: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 359: {
360: int i;
361:
362: if (options->num_ports == 0)
363: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 364: if (port == 0)
1.74 stevesk 365: for (i = 0; i < options->num_ports; i++)
366: add_one_listen_addr(options, addr, options->ports[i]);
367: else
1.76 stevesk 368: add_one_listen_addr(options, addr, port);
1.74 stevesk 369: }
370:
1.84 itojun 371: static void
1.74 stevesk 372: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 373: {
374: struct addrinfo hints, *ai, *aitop;
375: char strport[NI_MAXSERV];
376: int gaierr;
377:
1.74 stevesk 378: memset(&hints, 0, sizeof(hints));
379: hints.ai_family = IPv4or6;
380: hints.ai_socktype = SOCK_STREAM;
381: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 382: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 383: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
384: fatal("bad addr or host: %s (%s)",
385: addr ? addr : "<NULL>",
386: gai_strerror(gaierr));
387: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
388: ;
389: ai->ai_next = options->listen_addrs;
390: options->listen_addrs = aitop;
1.29 markus 391: }
392:
1.94 markus 393: int
394: process_server_config_line(ServerOptions *options, char *line,
395: const char *filename, int linenum)
1.1 deraadt 396: {
1.74 stevesk 397: char *cp, **charptr, *arg, *p;
1.112 deraadt 398: int *intptr, value, i, n;
1.25 markus 399: ServerOpCodes opcode;
400:
1.94 markus 401: cp = line;
402: arg = strdelim(&cp);
403: /* Ignore leading whitespace */
404: if (*arg == '\0')
405: arg = strdelim(&cp);
406: if (!arg || !*arg || *arg == '#')
407: return 0;
408: intptr = NULL;
409: charptr = NULL;
410: opcode = parse_token(arg, filename, linenum);
411: switch (opcode) {
412: case sBadOption:
413: return -1;
414: case sPort:
415: /* ignore ports from configfile if cmdline specifies ports */
416: if (options->ports_from_cmdline)
417: return 0;
418: if (options->listen_addrs != NULL)
419: fatal("%s line %d: ports must be specified before "
1.98 stevesk 420: "ListenAddress.", filename, linenum);
1.94 markus 421: if (options->num_ports >= MAX_PORTS)
422: fatal("%s line %d: too many ports.",
423: filename, linenum);
1.48 provos 424: arg = strdelim(&cp);
1.94 markus 425: if (!arg || *arg == '\0')
426: fatal("%s line %d: missing port number.",
427: filename, linenum);
428: options->ports[options->num_ports++] = a2port(arg);
429: if (options->ports[options->num_ports-1] == 0)
430: fatal("%s line %d: Badly formatted port number.",
431: filename, linenum);
432: break;
1.29 markus 433:
1.94 markus 434: case sServerKeyBits:
435: intptr = &options->server_key_bits;
1.25 markus 436: parse_int:
1.94 markus 437: arg = strdelim(&cp);
438: if (!arg || *arg == '\0')
439: fatal("%s line %d: missing integer value.",
440: filename, linenum);
441: value = atoi(arg);
442: if (*intptr == -1)
443: *intptr = value;
444: break;
1.25 markus 445:
1.94 markus 446: case sLoginGraceTime:
447: intptr = &options->login_grace_time;
1.81 stevesk 448: parse_time:
1.94 markus 449: arg = strdelim(&cp);
450: if (!arg || *arg == '\0')
451: fatal("%s line %d: missing time value.",
452: filename, linenum);
453: if ((value = convtime(arg)) == -1)
454: fatal("%s line %d: invalid time value.",
455: filename, linenum);
456: if (*intptr == -1)
457: *intptr = value;
458: break;
459:
460: case sKeyRegenerationTime:
461: intptr = &options->key_regeneration_time;
462: goto parse_time;
463:
464: case sListenAddress:
465: arg = strdelim(&cp);
466: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
467: fatal("%s line %d: missing inet addr.",
468: filename, linenum);
469: if (*arg == '[') {
470: if ((p = strchr(arg, ']')) == NULL)
471: fatal("%s line %d: bad ipv6 inet addr usage.",
472: filename, linenum);
473: arg++;
474: memmove(p, p+1, strlen(p+1)+1);
475: } else if (((p = strchr(arg, ':')) == NULL) ||
476: (strchr(p+1, ':') != NULL)) {
477: add_listen_addr(options, arg, 0);
1.81 stevesk 478: break;
1.94 markus 479: }
480: if (*p == ':') {
481: u_short port;
1.25 markus 482:
1.94 markus 483: p++;
484: if (*p == '\0')
485: fatal("%s line %d: bad inet addr:port usage.",
486: filename, linenum);
487: else {
488: *(p-1) = '\0';
489: if ((port = a2port(p)) == 0)
490: fatal("%s line %d: bad port number.",
1.74 stevesk 491: filename, linenum);
1.94 markus 492: add_listen_addr(options, arg, port);
1.74 stevesk 493: }
1.94 markus 494: } else if (*p == '\0')
495: add_listen_addr(options, arg, 0);
496: else
497: fatal("%s line %d: bad inet addr usage.",
498: filename, linenum);
499: break;
500:
501: case sHostKeyFile:
502: intptr = &options->num_host_key_files;
503: if (*intptr >= MAX_HOSTKEYS)
504: fatal("%s line %d: too many host keys specified (max %d).",
505: filename, linenum, MAX_HOSTKEYS);
506: charptr = &options->host_key_files[*intptr];
507: parse_filename:
508: arg = strdelim(&cp);
509: if (!arg || *arg == '\0')
510: fatal("%s line %d: missing file name.",
511: filename, linenum);
512: if (*charptr == NULL) {
513: *charptr = tilde_expand_filename(arg, getuid());
514: /* increase optional counter */
515: if (intptr != NULL)
516: *intptr = *intptr + 1;
517: }
518: break;
1.76 stevesk 519:
1.94 markus 520: case sPidFile:
521: charptr = &options->pid_file;
522: goto parse_filename;
1.25 markus 523:
1.94 markus 524: case sPermitRootLogin:
525: intptr = &options->permit_root_login;
526: arg = strdelim(&cp);
527: if (!arg || *arg == '\0')
528: fatal("%s line %d: missing yes/"
529: "without-password/forced-commands-only/no "
530: "argument.", filename, linenum);
531: value = 0; /* silence compiler */
532: if (strcmp(arg, "without-password") == 0)
533: value = PERMIT_NO_PASSWD;
534: else if (strcmp(arg, "forced-commands-only") == 0)
535: value = PERMIT_FORCED_ONLY;
536: else if (strcmp(arg, "yes") == 0)
537: value = PERMIT_YES;
538: else if (strcmp(arg, "no") == 0)
539: value = PERMIT_NO;
540: else
541: fatal("%s line %d: Bad yes/"
542: "without-password/forced-commands-only/no "
543: "argument: %s", filename, linenum, arg);
544: if (*intptr == -1)
545: *intptr = value;
546: break;
1.36 markus 547:
1.94 markus 548: case sIgnoreRhosts:
549: intptr = &options->ignore_rhosts;
1.25 markus 550: parse_flag:
1.94 markus 551: arg = strdelim(&cp);
552: if (!arg || *arg == '\0')
553: fatal("%s line %d: missing yes/no argument.",
554: filename, linenum);
555: value = 0; /* silence compiler */
556: if (strcmp(arg, "yes") == 0)
557: value = 1;
558: else if (strcmp(arg, "no") == 0)
559: value = 0;
560: else
561: fatal("%s line %d: Bad yes/no argument: %s",
562: filename, linenum, arg);
563: if (*intptr == -1)
564: *intptr = value;
565: break;
566:
567: case sIgnoreUserKnownHosts:
568: intptr = &options->ignore_user_known_hosts;
569: goto parse_flag;
570:
571: case sRhostsRSAAuthentication:
572: intptr = &options->rhosts_rsa_authentication;
573: goto parse_flag;
574:
575: case sHostbasedAuthentication:
576: intptr = &options->hostbased_authentication;
577: goto parse_flag;
578:
579: case sHostbasedUsesNameFromPacketOnly:
580: intptr = &options->hostbased_uses_name_from_packet_only;
581: goto parse_flag;
582:
583: case sRSAAuthentication:
584: intptr = &options->rsa_authentication;
585: goto parse_flag;
586:
587: case sPubkeyAuthentication:
588: intptr = &options->pubkey_authentication;
589: goto parse_flag;
1.119 jakob 590:
1.94 markus 591: case sKerberosAuthentication:
592: intptr = &options->kerberos_authentication;
593: goto parse_flag;
594:
595: case sKerberosOrLocalPasswd:
596: intptr = &options->kerberos_or_local_passwd;
597: goto parse_flag;
598:
599: case sKerberosTicketCleanup:
600: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 601: goto parse_flag;
602:
603: case sKerberosGetAFSToken:
604: intptr = &options->kerberos_get_afs_token;
1.125 markus 605: goto parse_flag;
606:
607: case sGssAuthentication:
608: intptr = &options->gss_authentication;
609: goto parse_flag;
610:
611: case sGssCleanupCreds:
612: intptr = &options->gss_cleanup_creds;
1.94 markus 613: goto parse_flag;
614:
615: case sPasswordAuthentication:
616: intptr = &options->password_authentication;
617: goto parse_flag;
618:
619: case sKbdInteractiveAuthentication:
620: intptr = &options->kbd_interactive_authentication;
621: goto parse_flag;
622:
623: case sChallengeResponseAuthentication:
624: intptr = &options->challenge_response_authentication;
625: goto parse_flag;
626:
627: case sPrintMotd:
628: intptr = &options->print_motd;
629: goto parse_flag;
630:
631: case sPrintLastLog:
632: intptr = &options->print_lastlog;
633: goto parse_flag;
634:
635: case sX11Forwarding:
636: intptr = &options->x11_forwarding;
637: goto parse_flag;
638:
639: case sX11DisplayOffset:
640: intptr = &options->x11_display_offset;
641: goto parse_int;
1.99 stevesk 642:
643: case sX11UseLocalhost:
644: intptr = &options->x11_use_localhost;
645: goto parse_flag;
1.94 markus 646:
647: case sXAuthLocation:
648: charptr = &options->xauth_location;
649: goto parse_filename;
650:
651: case sStrictModes:
652: intptr = &options->strict_modes;
653: goto parse_flag;
654:
1.129 markus 655: case sTCPKeepAlive:
656: intptr = &options->tcp_keep_alive;
1.94 markus 657: goto parse_flag;
658:
659: case sEmptyPasswd:
660: intptr = &options->permit_empty_passwd;
1.113 markus 661: goto parse_flag;
662:
663: case sPermitUserEnvironment:
664: intptr = &options->permit_user_env;
1.94 markus 665: goto parse_flag;
666:
667: case sUseLogin:
668: intptr = &options->use_login;
1.111 markus 669: goto parse_flag;
670:
671: case sCompression:
672: intptr = &options->compression;
1.94 markus 673: goto parse_flag;
674:
675: case sGatewayPorts:
676: intptr = &options->gateway_ports;
677: goto parse_flag;
1.25 markus 678:
1.122 markus 679: case sUseDNS:
680: intptr = &options->use_dns;
1.94 markus 681: goto parse_flag;
1.53 markus 682:
1.94 markus 683: case sLogFacility:
684: intptr = (int *) &options->log_facility;
685: arg = strdelim(&cp);
686: value = log_facility_number(arg);
1.101 markus 687: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 688: fatal("%.200s line %d: unsupported log facility '%s'",
689: filename, linenum, arg ? arg : "<NONE>");
690: if (*intptr == -1)
691: *intptr = (SyslogFacility) value;
692: break;
1.25 markus 693:
1.94 markus 694: case sLogLevel:
695: intptr = (int *) &options->log_level;
696: arg = strdelim(&cp);
697: value = log_level_number(arg);
1.101 markus 698: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 699: fatal("%.200s line %d: unsupported log level '%s'",
700: filename, linenum, arg ? arg : "<NONE>");
701: if (*intptr == -1)
702: *intptr = (LogLevel) value;
703: break;
704:
705: case sAllowTcpForwarding:
706: intptr = &options->allow_tcp_forwarding;
707: goto parse_flag;
1.102 provos 708:
709: case sUsePrivilegeSeparation:
710: intptr = &use_privsep;
711: goto parse_flag;
1.94 markus 712:
713: case sAllowUsers:
714: while ((arg = strdelim(&cp)) && *arg != '\0') {
715: if (options->num_allow_users >= MAX_ALLOW_USERS)
716: fatal("%s line %d: too many allow users.",
717: filename, linenum);
1.112 deraadt 718: options->allow_users[options->num_allow_users++] =
719: xstrdup(arg);
1.94 markus 720: }
721: break;
1.25 markus 722:
1.94 markus 723: case sDenyUsers:
724: while ((arg = strdelim(&cp)) && *arg != '\0') {
725: if (options->num_deny_users >= MAX_DENY_USERS)
726: fatal( "%s line %d: too many deny users.",
727: filename, linenum);
1.112 deraadt 728: options->deny_users[options->num_deny_users++] =
729: xstrdup(arg);
1.94 markus 730: }
731: break;
1.25 markus 732:
1.94 markus 733: case sAllowGroups:
734: while ((arg = strdelim(&cp)) && *arg != '\0') {
735: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
736: fatal("%s line %d: too many allow groups.",
737: filename, linenum);
1.112 deraadt 738: options->allow_groups[options->num_allow_groups++] =
739: xstrdup(arg);
1.94 markus 740: }
741: break;
1.33 markus 742:
1.94 markus 743: case sDenyGroups:
744: while ((arg = strdelim(&cp)) && *arg != '\0') {
745: if (options->num_deny_groups >= MAX_DENY_GROUPS)
746: fatal("%s line %d: too many deny groups.",
747: filename, linenum);
748: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
749: }
750: break;
1.66 markus 751:
1.94 markus 752: case sCiphers:
753: arg = strdelim(&cp);
754: if (!arg || *arg == '\0')
755: fatal("%s line %d: Missing argument.", filename, linenum);
756: if (!ciphers_valid(arg))
757: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
758: filename, linenum, arg ? arg : "<NONE>");
759: if (options->ciphers == NULL)
760: options->ciphers = xstrdup(arg);
761: break;
1.33 markus 762:
1.94 markus 763: case sMacs:
764: arg = strdelim(&cp);
765: if (!arg || *arg == '\0')
766: fatal("%s line %d: Missing argument.", filename, linenum);
767: if (!mac_valid(arg))
768: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
769: filename, linenum, arg ? arg : "<NONE>");
770: if (options->macs == NULL)
771: options->macs = xstrdup(arg);
772: break;
1.43 jakob 773:
1.94 markus 774: case sProtocol:
775: intptr = &options->protocol;
776: arg = strdelim(&cp);
777: if (!arg || *arg == '\0')
778: fatal("%s line %d: Missing argument.", filename, linenum);
779: value = proto_spec(arg);
780: if (value == SSH_PROTO_UNKNOWN)
781: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 782: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 783: if (*intptr == SSH_PROTO_UNKNOWN)
784: *intptr = value;
785: break;
786:
787: case sSubsystem:
788: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
789: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 790: filename, linenum);
1.94 markus 791: }
792: arg = strdelim(&cp);
793: if (!arg || *arg == '\0')
794: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 795: filename, linenum);
1.94 markus 796: for (i = 0; i < options->num_subsystems; i++)
797: if (strcmp(arg, options->subsystem_name[i]) == 0)
798: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 799: filename, linenum, arg);
1.94 markus 800: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
801: arg = strdelim(&cp);
802: if (!arg || *arg == '\0')
803: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 804: filename, linenum);
1.94 markus 805: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
806: options->num_subsystems++;
807: break;
1.46 markus 808:
1.94 markus 809: case sMaxStartups:
810: arg = strdelim(&cp);
811: if (!arg || *arg == '\0')
812: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 813: filename, linenum);
1.94 markus 814: if ((n = sscanf(arg, "%d:%d:%d",
815: &options->max_startups_begin,
816: &options->max_startups_rate,
817: &options->max_startups)) == 3) {
818: if (options->max_startups_begin >
819: options->max_startups ||
820: options->max_startups_rate > 100 ||
821: options->max_startups_rate < 1)
1.50 markus 822: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 823: filename, linenum);
1.94 markus 824: } else if (n != 1)
825: fatal("%s line %d: Illegal MaxStartups spec.",
826: filename, linenum);
827: else
828: options->max_startups = options->max_startups_begin;
829: break;
830:
831: case sBanner:
832: charptr = &options->banner;
833: goto parse_filename;
834: /*
835: * These options can contain %X options expanded at
836: * connect time, so that you can specify paths like:
837: *
838: * AuthorizedKeysFile /etc/ssh_keys/%u
839: */
840: case sAuthorizedKeysFile:
841: case sAuthorizedKeysFile2:
842: charptr = (opcode == sAuthorizedKeysFile ) ?
843: &options->authorized_keys_file :
844: &options->authorized_keys_file2;
845: goto parse_filename;
846:
847: case sClientAliveInterval:
848: intptr = &options->client_alive_interval;
849: goto parse_time;
850:
851: case sClientAliveCountMax:
852: intptr = &options->client_alive_count_max;
853: goto parse_int;
1.131 djm 854:
855: case sAcceptEnv:
856: while ((arg = strdelim(&cp)) && *arg != '\0') {
857: if (strchr(arg, '=') != NULL)
858: fatal("%s line %d: Invalid environment name.",
859: filename, linenum);
860: if (options->num_accept_env >= MAX_ACCEPT_ENV)
861: fatal("%s line %d: too many allow env.",
862: filename, linenum);
863: options->accept_env[options->num_accept_env++] =
864: xstrdup(arg);
865: }
866: break;
1.94 markus 867:
868: case sDeprecated:
1.117 itojun 869: logit("%s line %d: Deprecated option %s",
1.121 jakob 870: filename, linenum, arg);
871: while (arg)
872: arg = strdelim(&cp);
873: break;
874:
875: case sUnsupported:
876: logit("%s line %d: Unsupported option %s",
1.94 markus 877: filename, linenum, arg);
878: while (arg)
879: arg = strdelim(&cp);
880: break;
881:
882: default:
883: fatal("%s line %d: Missing handler for opcode %s (%d)",
884: filename, linenum, arg, opcode);
885: }
886: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
887: fatal("%s line %d: garbage at end of line; \"%.200s\".",
888: filename, linenum, arg);
889: return 0;
890: }
891:
892: /* Reads the server configuration file. */
1.25 markus 893:
1.94 markus 894: void
895: read_server_config(ServerOptions *options, const char *filename)
896: {
1.112 deraadt 897: int linenum, bad_options = 0;
898: char line[1024];
1.94 markus 899: FILE *f;
1.81 stevesk 900:
1.116 markus 901: debug2("read_server_config: filename %s", filename);
1.94 markus 902: f = fopen(filename, "r");
903: if (!f) {
904: perror(filename);
905: exit(1);
906: }
907: linenum = 0;
908: while (fgets(line, sizeof(line), f)) {
909: /* Update line number counter. */
910: linenum++;
911: if (process_server_config_line(options, line, filename, linenum) != 0)
912: bad_options++;
1.1 deraadt 913: }
1.25 markus 914: fclose(f);
1.78 stevesk 915: if (bad_options > 0)
916: fatal("%s: terminating, %d bad configuration options",
917: filename, bad_options);
1.1 deraadt 918: }
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