Annotation of src/usr.bin/ssh/servconf.c, Revision 1.91
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"
1.91 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.90 2001/11/11 13:02:31 markus Exp $");
1.62 markus 14:
1.88 itojun 15: #if defined(KRB4) || defined(KRB5)
1.62 markus 16: #include <krb.h>
1.86 dugsong 17: #endif
18: #ifdef AFS
19: #include <kafs.h>
1.62 markus 20: #endif
1.1 deraadt 21:
22: #include "ssh.h"
1.62 markus 23: #include "log.h"
1.1 deraadt 24: #include "servconf.h"
25: #include "xmalloc.h"
1.33 markus 26: #include "compat.h"
1.60 markus 27: #include "pathnames.h"
1.62 markus 28: #include "tildexpand.h"
29: #include "misc.h"
30: #include "cipher.h"
1.66 markus 31: #include "kex.h"
32: #include "mac.h"
1.1 deraadt 33:
1.84 itojun 34: static void add_listen_addr(ServerOptions *, char *, u_short);
35: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 36:
1.62 markus 37: /* AF_UNSPEC or AF_INET or AF_INET6 */
38: extern int IPv4or6;
39:
1.1 deraadt 40: /* Initializes the server options to their default values. */
41:
1.34 markus 42: void
1.25 markus 43: initialize_server_options(ServerOptions *options)
1.1 deraadt 44: {
1.25 markus 45: memset(options, 0, sizeof(*options));
1.29 markus 46: options->num_ports = 0;
47: options->ports_from_cmdline = 0;
48: options->listen_addrs = NULL;
1.54 markus 49: options->num_host_key_files = 0;
1.36 markus 50: options->pid_file = NULL;
1.25 markus 51: options->server_key_bits = -1;
52: options->login_grace_time = -1;
53: options->key_regeneration_time = -1;
1.67 markus 54: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 55: options->ignore_rhosts = -1;
56: options->ignore_user_known_hosts = -1;
57: options->print_motd = -1;
1.72 stevesk 58: options->print_lastlog = -1;
1.25 markus 59: options->x11_forwarding = -1;
60: options->x11_display_offset = -1;
1.42 markus 61: options->xauth_location = NULL;
1.25 markus 62: options->strict_modes = -1;
63: options->keepalives = -1;
64: options->log_facility = (SyslogFacility) - 1;
65: options->log_level = (LogLevel) - 1;
66: options->rhosts_authentication = -1;
67: options->rhosts_rsa_authentication = -1;
1.75 markus 68: options->hostbased_authentication = -1;
69: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 70: options->rsa_authentication = -1;
1.54 markus 71: options->pubkey_authentication = -1;
1.85 dugsong 72: #if defined(KRB4) || defined(KRB5)
1.25 markus 73: options->kerberos_authentication = -1;
74: options->kerberos_or_local_passwd = -1;
75: options->kerberos_ticket_cleanup = -1;
1.1 deraadt 76: #endif
1.85 dugsong 77: #if defined(AFS) || defined(KRB5)
78: options->kerberos_tgt_passing = -1;
79: #endif
1.4 dugsong 80: #ifdef AFS
1.25 markus 81: options->afs_token_passing = -1;
1.1 deraadt 82: #endif
1.25 markus 83: options->password_authentication = -1;
1.52 markus 84: options->kbd_interactive_authentication = -1;
1.80 markus 85: options->challenge_response_authentication = -1;
1.25 markus 86: options->permit_empty_passwd = -1;
87: options->use_login = -1;
1.53 markus 88: options->allow_tcp_forwarding = -1;
1.25 markus 89: options->num_allow_users = 0;
90: options->num_deny_users = 0;
91: options->num_allow_groups = 0;
92: options->num_deny_groups = 0;
1.33 markus 93: options->ciphers = NULL;
1.66 markus 94: options->macs = NULL;
1.33 markus 95: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 96: options->gateway_ports = -1;
1.43 jakob 97: options->num_subsystems = 0;
1.50 markus 98: options->max_startups_begin = -1;
99: options->max_startups_rate = -1;
1.46 markus 100: options->max_startups = -1;
1.57 markus 101: options->banner = NULL;
1.64 markus 102: options->reverse_mapping_check = -1;
1.77 beck 103: options->client_alive_interval = -1;
104: options->client_alive_count_max = -1;
1.82 markus 105: options->authorized_keys_file = NULL;
106: options->authorized_keys_file2 = NULL;
1.1 deraadt 107: }
108:
1.34 markus 109: void
1.25 markus 110: fill_default_server_options(ServerOptions *options)
1.1 deraadt 111: {
1.54 markus 112: if (options->protocol == SSH_PROTO_UNKNOWN)
113: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
114: if (options->num_host_key_files == 0) {
115: /* fill default hostkeys for protocols */
116: if (options->protocol & SSH_PROTO_1)
1.60 markus 117: options->host_key_files[options->num_host_key_files++] = _PATH_HOST_KEY_FILE;
1.54 markus 118: if (options->protocol & SSH_PROTO_2)
1.60 markus 119: options->host_key_files[options->num_host_key_files++] = _PATH_HOST_DSA_KEY_FILE;
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)
130: options->login_grace_time = 600;
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;
1.83 markus 147: #ifdef _PATH_XAUTH
1.42 markus 148: if (options->xauth_location == NULL)
1.83 markus 149: options->xauth_location = _PATH_XAUTH;
150: #endif
1.25 markus 151: if (options->strict_modes == -1)
152: options->strict_modes = 1;
153: if (options->keepalives == -1)
154: options->keepalives = 1;
155: if (options->log_facility == (SyslogFacility) (-1))
156: options->log_facility = SYSLOG_FACILITY_AUTH;
157: if (options->log_level == (LogLevel) (-1))
1.58 markus 158: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 159: if (options->rhosts_authentication == -1)
160: options->rhosts_authentication = 0;
161: if (options->rhosts_rsa_authentication == -1)
1.30 markus 162: options->rhosts_rsa_authentication = 0;
1.75 markus 163: if (options->hostbased_authentication == -1)
164: options->hostbased_authentication = 0;
165: if (options->hostbased_uses_name_from_packet_only == -1)
166: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 167: if (options->rsa_authentication == -1)
168: options->rsa_authentication = 1;
1.54 markus 169: if (options->pubkey_authentication == -1)
170: options->pubkey_authentication = 1;
1.85 dugsong 171: #if defined(KRB4) || defined(KRB5)
1.25 markus 172: if (options->kerberos_authentication == -1)
173: options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
174: if (options->kerberos_or_local_passwd == -1)
175: options->kerberos_or_local_passwd = 1;
176: if (options->kerberos_ticket_cleanup == -1)
177: options->kerberos_ticket_cleanup = 1;
1.85 dugsong 178: #endif
179: #if defined(AFS) || defined(KRB5)
1.25 markus 180: if (options->kerberos_tgt_passing == -1)
181: options->kerberos_tgt_passing = 0;
1.85 dugsong 182: #endif
183: #ifdef AFS
1.25 markus 184: if (options->afs_token_passing == -1)
185: options->afs_token_passing = k_hasafs();
1.85 dugsong 186: #endif
1.25 markus 187: if (options->password_authentication == -1)
188: options->password_authentication = 1;
1.52 markus 189: if (options->kbd_interactive_authentication == -1)
190: options->kbd_interactive_authentication = 0;
1.80 markus 191: if (options->challenge_response_authentication == -1)
192: options->challenge_response_authentication = 1;
1.25 markus 193: if (options->permit_empty_passwd == -1)
1.30 markus 194: options->permit_empty_passwd = 0;
1.25 markus 195: if (options->use_login == -1)
196: options->use_login = 0;
1.53 markus 197: if (options->allow_tcp_forwarding == -1)
198: options->allow_tcp_forwarding = 1;
1.38 markus 199: if (options->gateway_ports == -1)
200: options->gateway_ports = 0;
1.46 markus 201: if (options->max_startups == -1)
202: options->max_startups = 10;
1.50 markus 203: if (options->max_startups_rate == -1)
204: options->max_startups_rate = 100; /* 100% */
205: if (options->max_startups_begin == -1)
206: options->max_startups_begin = options->max_startups;
1.64 markus 207: if (options->reverse_mapping_check == -1)
208: options->reverse_mapping_check = 0;
1.77 beck 209: if (options->client_alive_interval == -1)
210: options->client_alive_interval = 0;
211: if (options->client_alive_count_max == -1)
212: options->client_alive_count_max = 3;
1.90 markus 213: if (options->authorized_keys_file2 == NULL) {
214: /* authorized_keys_file2 falls back to authorized_keys_file */
215: if (options->authorized_keys_file != NULL)
216: options->authorized_keys_file2 = options->authorized_keys_file;
217: else
218: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
219: }
220: if (options->authorized_keys_file == NULL)
221: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.1 deraadt 222: }
223:
224: /* Keyword tokens. */
1.25 markus 225: typedef enum {
226: sBadOption, /* == unknown option */
227: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
228: sPermitRootLogin, sLogFacility, sLogLevel,
229: sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
1.85 dugsong 230: #if defined(KRB4) || defined(KRB5)
1.25 markus 231: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.1 deraadt 232: #endif
1.85 dugsong 233: #if defined(AFS) || defined(KRB5)
234: sKerberosTgtPassing,
235: #endif
1.1 deraadt 236: #ifdef AFS
1.85 dugsong 237: sAFSTokenPassing,
1.1 deraadt 238: #endif
1.63 markus 239: sChallengeResponseAuthentication,
1.52 markus 240: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 241: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
242: sX11Forwarding, sX11DisplayOffset,
1.89 jakob 243: sStrictModes, sEmptyPasswd, sKeepAlives,
1.53 markus 244: sUseLogin, sAllowTcpForwarding,
245: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 246: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 247: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.75 markus 248: sBanner, sReverseMappingCheck, sHostbasedAuthentication,
1.77 beck 249: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 250: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
251: sDeprecated
1.1 deraadt 252: } ServerOpCodes;
253:
254: /* Textual representation of the tokens. */
1.25 markus 255: static struct {
256: const char *name;
257: ServerOpCodes opcode;
258: } keywords[] = {
259: { "port", sPort },
260: { "hostkey", sHostKeyFile },
1.54 markus 261: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 262: { "pidfile", sPidFile },
1.25 markus 263: { "serverkeybits", sServerKeyBits },
264: { "logingracetime", sLoginGraceTime },
265: { "keyregenerationinterval", sKeyRegenerationTime },
266: { "permitrootlogin", sPermitRootLogin },
267: { "syslogfacility", sLogFacility },
268: { "loglevel", sLogLevel },
269: { "rhostsauthentication", sRhostsAuthentication },
270: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 271: { "hostbasedauthentication", sHostbasedAuthentication },
272: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 273: { "rsaauthentication", sRSAAuthentication },
1.54 markus 274: { "pubkeyauthentication", sPubkeyAuthentication },
275: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.85 dugsong 276: #if defined(KRB4) || defined(KRB5)
1.25 markus 277: { "kerberosauthentication", sKerberosAuthentication },
278: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
279: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.1 deraadt 280: #endif
1.85 dugsong 281: #if defined(AFS) || defined(KRB5)
282: { "kerberostgtpassing", sKerberosTgtPassing },
283: #endif
1.4 dugsong 284: #ifdef AFS
1.25 markus 285: { "afstokenpassing", sAFSTokenPassing },
1.1 deraadt 286: #endif
1.25 markus 287: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 288: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 289: { "challengeresponseauthentication", sChallengeResponseAuthentication },
290: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 291: { "checkmail", sDeprecated },
1.25 markus 292: { "listenaddress", sListenAddress },
293: { "printmotd", sPrintMotd },
1.72 stevesk 294: { "printlastlog", sPrintLastLog },
1.25 markus 295: { "ignorerhosts", sIgnoreRhosts },
296: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
297: { "x11forwarding", sX11Forwarding },
298: { "x11displayoffset", sX11DisplayOffset },
1.42 markus 299: { "xauthlocation", sXAuthLocation },
1.25 markus 300: { "strictmodes", sStrictModes },
301: { "permitemptypasswords", sEmptyPasswd },
302: { "uselogin", sUseLogin },
303: { "keepalive", sKeepAlives },
1.53 markus 304: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 305: { "allowusers", sAllowUsers },
306: { "denyusers", sDenyUsers },
307: { "allowgroups", sAllowGroups },
308: { "denygroups", sDenyGroups },
1.33 markus 309: { "ciphers", sCiphers },
1.66 markus 310: { "macs", sMacs },
1.33 markus 311: { "protocol", sProtocol },
1.38 markus 312: { "gatewayports", sGatewayPorts },
1.43 jakob 313: { "subsystem", sSubsystem },
1.46 markus 314: { "maxstartups", sMaxStartups },
1.57 markus 315: { "banner", sBanner },
1.64 markus 316: { "reversemappingcheck", sReverseMappingCheck },
1.77 beck 317: { "clientaliveinterval", sClientAliveInterval },
318: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 319: { "authorizedkeysfile", sAuthorizedKeysFile },
320: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.25 markus 321: { NULL, 0 }
1.1 deraadt 322: };
323:
1.27 markus 324: /*
1.73 stevesk 325: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 326: */
1.1 deraadt 327:
1.34 markus 328: static ServerOpCodes
1.25 markus 329: parse_token(const char *cp, const char *filename,
330: int linenum)
1.1 deraadt 331: {
1.55 markus 332: u_int i;
1.1 deraadt 333:
1.25 markus 334: for (i = 0; keywords[i].name; i++)
1.28 markus 335: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 336: return keywords[i].opcode;
337:
1.78 stevesk 338: error("%s: line %d: Bad configuration option: %s",
339: filename, linenum, cp);
1.25 markus 340: return sBadOption;
1.1 deraadt 341: }
342:
1.84 itojun 343: static void
1.76 stevesk 344: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 345: {
346: int i;
347:
348: if (options->num_ports == 0)
349: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 350: if (port == 0)
1.74 stevesk 351: for (i = 0; i < options->num_ports; i++)
352: add_one_listen_addr(options, addr, options->ports[i]);
353: else
1.76 stevesk 354: add_one_listen_addr(options, addr, port);
1.74 stevesk 355: }
356:
1.84 itojun 357: static void
1.74 stevesk 358: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 359: {
360: struct addrinfo hints, *ai, *aitop;
361: char strport[NI_MAXSERV];
362: int gaierr;
363:
1.74 stevesk 364: memset(&hints, 0, sizeof(hints));
365: hints.ai_family = IPv4or6;
366: hints.ai_socktype = SOCK_STREAM;
367: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
368: snprintf(strport, sizeof strport, "%d", port);
369: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
370: fatal("bad addr or host: %s (%s)",
371: addr ? addr : "<NULL>",
372: gai_strerror(gaierr));
373: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
374: ;
375: ai->ai_next = options->listen_addrs;
376: options->listen_addrs = aitop;
1.29 markus 377: }
378:
1.1 deraadt 379: /* Reads the server configuration file. */
380:
1.34 markus 381: void
1.25 markus 382: read_server_config(ServerOptions *options, const char *filename)
1.1 deraadt 383: {
1.25 markus 384: FILE *f;
385: char line[1024];
1.74 stevesk 386: char *cp, **charptr, *arg, *p;
1.25 markus 387: int linenum, *intptr, value;
388: int bad_options = 0;
389: ServerOpCodes opcode;
1.87 stevesk 390: int i, n;
1.25 markus 391:
392: f = fopen(filename, "r");
393: if (!f) {
394: perror(filename);
1.1 deraadt 395: exit(1);
1.25 markus 396: }
397: linenum = 0;
398: while (fgets(line, sizeof(line), f)) {
399: linenum++;
1.48 provos 400: cp = line;
401: arg = strdelim(&cp);
402: /* Ignore leading whitespace */
403: if (*arg == '\0')
1.49 markus 404: arg = strdelim(&cp);
1.61 djm 405: if (!arg || !*arg || *arg == '#')
1.25 markus 406: continue;
1.54 markus 407: intptr = NULL;
408: charptr = NULL;
1.47 ho 409: opcode = parse_token(arg, filename, linenum);
1.25 markus 410: switch (opcode) {
411: case sBadOption:
412: bad_options++;
413: continue;
414: case sPort:
1.29 markus 415: /* ignore ports from configfile if cmdline specifies ports */
416: if (options->ports_from_cmdline)
417: continue;
418: if (options->listen_addrs != NULL)
419: fatal("%s line %d: ports must be specified before "
1.79 stevesk 420: "ListenAdress.", filename, linenum);
1.29 markus 421: if (options->num_ports >= MAX_PORTS)
1.70 millert 422: fatal("%s line %d: too many ports.",
1.34 markus 423: filename, linenum);
1.48 provos 424: arg = strdelim(&cp);
1.47 ho 425: if (!arg || *arg == '\0')
1.70 millert 426: fatal("%s line %d: missing port number.",
1.29 markus 427: filename, linenum);
1.76 stevesk 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);
1.29 markus 432: break;
433:
434: case sServerKeyBits:
435: intptr = &options->server_key_bits;
1.25 markus 436: parse_int:
1.48 provos 437: arg = strdelim(&cp);
1.78 stevesk 438: if (!arg || *arg == '\0')
439: fatal("%s line %d: missing integer value.",
440: filename, linenum);
1.47 ho 441: value = atoi(arg);
1.25 markus 442: if (*intptr == -1)
443: *intptr = value;
444: break;
445:
446: case sLoginGraceTime:
447: intptr = &options->login_grace_time;
1.81 stevesk 448: parse_time:
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;
1.25 markus 459:
460: case sKeyRegenerationTime:
461: intptr = &options->key_regeneration_time;
1.81 stevesk 462: goto parse_time;
1.25 markus 463:
464: case sListenAddress:
1.48 provos 465: arg = strdelim(&cp);
1.74 stevesk 466: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
1.70 millert 467: fatal("%s line %d: missing inet addr.",
1.29 markus 468: filename, linenum);
1.74 stevesk 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)) {
1.76 stevesk 477: add_listen_addr(options, arg, 0);
1.74 stevesk 478: break;
479: }
480: if (*p == ':') {
1.76 stevesk 481: u_short port;
482:
1.74 stevesk 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';
1.76 stevesk 489: if ((port = a2port(p)) == 0)
490: fatal("%s line %d: bad port number.",
491: filename, linenum);
492: add_listen_addr(options, arg, port);
1.74 stevesk 493: }
494: } else if (*p == '\0')
1.76 stevesk 495: add_listen_addr(options, arg, 0);
1.74 stevesk 496: else
497: fatal("%s line %d: bad inet addr usage.",
498: filename, linenum);
1.25 markus 499: break;
500:
501: case sHostKeyFile:
1.54 markus 502: intptr = &options->num_host_key_files;
1.78 stevesk 503: if (*intptr >= MAX_HOSTKEYS)
504: fatal("%s line %d: too many host keys specified (max %d).",
1.54 markus 505: filename, linenum, MAX_HOSTKEYS);
506: charptr = &options->host_key_files[*intptr];
1.42 markus 507: parse_filename:
1.48 provos 508: arg = strdelim(&cp);
1.78 stevesk 509: if (!arg || *arg == '\0')
510: fatal("%s line %d: missing file name.",
1.36 markus 511: filename, linenum);
1.54 markus 512: if (*charptr == NULL) {
1.47 ho 513: *charptr = tilde_expand_filename(arg, getuid());
1.54 markus 514: /* increase optional counter */
515: if (intptr != NULL)
516: *intptr = *intptr + 1;
517: }
1.36 markus 518: break;
519:
520: case sPidFile:
521: charptr = &options->pid_file;
1.42 markus 522: goto parse_filename;
1.25 markus 523:
524: case sPermitRootLogin:
525: intptr = &options->permit_root_login;
1.48 provos 526: arg = strdelim(&cp);
1.78 stevesk 527: if (!arg || *arg == '\0')
528: fatal("%s line %d: missing yes/"
1.71 stevesk 529: "without-password/forced-commands-only/no "
1.78 stevesk 530: "argument.", filename, linenum);
531: value = 0; /* silence compiler */
1.47 ho 532: if (strcmp(arg, "without-password") == 0)
1.67 markus 533: value = PERMIT_NO_PASSWD;
534: else if (strcmp(arg, "forced-commands-only") == 0)
535: value = PERMIT_FORCED_ONLY;
1.47 ho 536: else if (strcmp(arg, "yes") == 0)
1.67 markus 537: value = PERMIT_YES;
1.47 ho 538: else if (strcmp(arg, "no") == 0)
1.67 markus 539: value = PERMIT_NO;
1.78 stevesk 540: else
541: fatal("%s line %d: Bad yes/"
1.67 markus 542: "without-password/forced-commands-only/no "
1.78 stevesk 543: "argument: %s", filename, linenum, arg);
1.25 markus 544: if (*intptr == -1)
545: *intptr = value;
546: break;
547:
548: case sIgnoreRhosts:
549: intptr = &options->ignore_rhosts;
550: parse_flag:
1.48 provos 551: arg = strdelim(&cp);
1.78 stevesk 552: if (!arg || *arg == '\0')
553: fatal("%s line %d: missing yes/no argument.",
554: filename, linenum);
555: value = 0; /* silence compiler */
1.47 ho 556: if (strcmp(arg, "yes") == 0)
1.25 markus 557: value = 1;
1.47 ho 558: else if (strcmp(arg, "no") == 0)
1.25 markus 559: value = 0;
1.78 stevesk 560: else
561: fatal("%s line %d: Bad yes/no argument: %s",
1.47 ho 562: filename, linenum, arg);
1.25 markus 563: if (*intptr == -1)
564: *intptr = value;
565: break;
566:
567: case sIgnoreUserKnownHosts:
568: intptr = &options->ignore_user_known_hosts;
1.31 markus 569: goto parse_flag;
1.25 markus 570:
571: case sRhostsAuthentication:
572: intptr = &options->rhosts_authentication;
573: goto parse_flag;
574:
575: case sRhostsRSAAuthentication:
576: intptr = &options->rhosts_rsa_authentication;
1.75 markus 577: goto parse_flag;
578:
579: case sHostbasedAuthentication:
580: intptr = &options->hostbased_authentication;
581: goto parse_flag;
582:
583: case sHostbasedUsesNameFromPacketOnly:
584: intptr = &options->hostbased_uses_name_from_packet_only;
1.25 markus 585: goto parse_flag;
586:
587: case sRSAAuthentication:
588: intptr = &options->rsa_authentication;
1.39 markus 589: goto parse_flag;
590:
1.54 markus 591: case sPubkeyAuthentication:
592: intptr = &options->pubkey_authentication;
1.25 markus 593: goto parse_flag;
1.85 dugsong 594: #if defined(KRB4) || defined(KRB5)
1.25 markus 595: case sKerberosAuthentication:
596: intptr = &options->kerberos_authentication;
597: goto parse_flag;
598:
599: case sKerberosOrLocalPasswd:
600: intptr = &options->kerberos_or_local_passwd;
601: goto parse_flag;
602:
603: case sKerberosTicketCleanup:
604: intptr = &options->kerberos_ticket_cleanup;
605: goto parse_flag;
1.1 deraadt 606: #endif
1.85 dugsong 607: #if defined(AFS) || defined(KRB5)
1.25 markus 608: case sKerberosTgtPassing:
609: intptr = &options->kerberos_tgt_passing;
610: goto parse_flag;
1.85 dugsong 611: #endif
612: #ifdef AFS
1.25 markus 613: case sAFSTokenPassing:
614: intptr = &options->afs_token_passing;
615: goto parse_flag;
616: #endif
617:
618: case sPasswordAuthentication:
619: intptr = &options->password_authentication;
1.52 markus 620: goto parse_flag;
621:
622: case sKbdInteractiveAuthentication:
623: intptr = &options->kbd_interactive_authentication;
1.25 markus 624: goto parse_flag;
625:
1.63 markus 626: case sChallengeResponseAuthentication:
1.80 markus 627: intptr = &options->challenge_response_authentication;
1.25 markus 628: goto parse_flag;
629:
630: case sPrintMotd:
631: intptr = &options->print_motd;
1.72 stevesk 632: goto parse_flag;
633:
634: case sPrintLastLog:
635: intptr = &options->print_lastlog;
1.25 markus 636: goto parse_flag;
637:
638: case sX11Forwarding:
639: intptr = &options->x11_forwarding;
640: goto parse_flag;
641:
642: case sX11DisplayOffset:
643: intptr = &options->x11_display_offset;
644: goto parse_int;
645:
1.42 markus 646: case sXAuthLocation:
647: charptr = &options->xauth_location;
648: goto parse_filename;
1.65 stevesk 649:
1.25 markus 650: case sStrictModes:
651: intptr = &options->strict_modes;
652: goto parse_flag;
653:
654: case sKeepAlives:
655: intptr = &options->keepalives;
656: goto parse_flag;
657:
658: case sEmptyPasswd:
659: intptr = &options->permit_empty_passwd;
660: goto parse_flag;
661:
662: case sUseLogin:
663: intptr = &options->use_login;
1.38 markus 664: goto parse_flag;
665:
666: case sGatewayPorts:
667: intptr = &options->gateway_ports;
1.64 markus 668: goto parse_flag;
669:
670: case sReverseMappingCheck:
671: intptr = &options->reverse_mapping_check;
1.25 markus 672: goto parse_flag;
673:
674: case sLogFacility:
675: intptr = (int *) &options->log_facility;
1.48 provos 676: arg = strdelim(&cp);
1.47 ho 677: value = log_facility_number(arg);
1.25 markus 678: if (value == (SyslogFacility) - 1)
1.70 millert 679: fatal("%.200s line %d: unsupported log facility '%s'",
1.47 ho 680: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 681: if (*intptr == -1)
682: *intptr = (SyslogFacility) value;
683: break;
684:
685: case sLogLevel:
686: intptr = (int *) &options->log_level;
1.48 provos 687: arg = strdelim(&cp);
1.47 ho 688: value = log_level_number(arg);
1.25 markus 689: if (value == (LogLevel) - 1)
1.70 millert 690: fatal("%.200s line %d: unsupported log level '%s'",
1.47 ho 691: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 692: if (*intptr == -1)
693: *intptr = (LogLevel) value;
694: break;
1.53 markus 695:
696: case sAllowTcpForwarding:
697: intptr = &options->allow_tcp_forwarding;
698: goto parse_flag;
1.25 markus 699:
700: case sAllowUsers:
1.48 provos 701: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 702: if (options->num_allow_users >= MAX_ALLOW_USERS)
1.70 millert 703: fatal("%s line %d: too many allow users.",
1.33 markus 704: filename, linenum);
1.47 ho 705: options->allow_users[options->num_allow_users++] = xstrdup(arg);
1.25 markus 706: }
707: break;
708:
709: case sDenyUsers:
1.48 provos 710: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 711: if (options->num_deny_users >= MAX_DENY_USERS)
1.70 millert 712: fatal( "%s line %d: too many deny users.",
1.33 markus 713: filename, linenum);
1.47 ho 714: options->deny_users[options->num_deny_users++] = xstrdup(arg);
1.25 markus 715: }
716: break;
717:
718: case sAllowGroups:
1.48 provos 719: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 720: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1.70 millert 721: fatal("%s line %d: too many allow groups.",
1.33 markus 722: filename, linenum);
1.47 ho 723: options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
1.25 markus 724: }
725: break;
726:
727: case sDenyGroups:
1.48 provos 728: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 729: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1.70 millert 730: fatal("%s line %d: too many deny groups.",
1.33 markus 731: filename, linenum);
1.47 ho 732: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
1.25 markus 733: }
1.33 markus 734: break;
735:
736: case sCiphers:
1.48 provos 737: arg = strdelim(&cp);
1.47 ho 738: if (!arg || *arg == '\0')
1.41 markus 739: fatal("%s line %d: Missing argument.", filename, linenum);
1.47 ho 740: if (!ciphers_valid(arg))
1.40 markus 741: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1.47 ho 742: filename, linenum, arg ? arg : "<NONE>");
1.33 markus 743: if (options->ciphers == NULL)
1.47 ho 744: options->ciphers = xstrdup(arg);
1.66 markus 745: break;
746:
747: case sMacs:
748: arg = strdelim(&cp);
749: if (!arg || *arg == '\0')
750: fatal("%s line %d: Missing argument.", filename, linenum);
751: if (!mac_valid(arg))
752: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
753: filename, linenum, arg ? arg : "<NONE>");
754: if (options->macs == NULL)
755: options->macs = xstrdup(arg);
1.33 markus 756: break;
757:
758: case sProtocol:
759: intptr = &options->protocol;
1.48 provos 760: arg = strdelim(&cp);
1.47 ho 761: if (!arg || *arg == '\0')
1.41 markus 762: fatal("%s line %d: Missing argument.", filename, linenum);
1.47 ho 763: value = proto_spec(arg);
1.33 markus 764: if (value == SSH_PROTO_UNKNOWN)
765: fatal("%s line %d: Bad protocol spec '%s'.",
1.47 ho 766: filename, linenum, arg ? arg : "<NONE>");
1.33 markus 767: if (*intptr == SSH_PROTO_UNKNOWN)
768: *intptr = value;
1.43 jakob 769: break;
770:
771: case sSubsystem:
772: if(options->num_subsystems >= MAX_SUBSYSTEMS) {
773: fatal("%s line %d: too many subsystems defined.",
774: filename, linenum);
775: }
1.48 provos 776: arg = strdelim(&cp);
1.47 ho 777: if (!arg || *arg == '\0')
1.43 jakob 778: fatal("%s line %d: Missing subsystem name.",
779: filename, linenum);
780: for (i = 0; i < options->num_subsystems; i++)
1.47 ho 781: if(strcmp(arg, options->subsystem_name[i]) == 0)
1.43 jakob 782: fatal("%s line %d: Subsystem '%s' already defined.",
1.47 ho 783: filename, linenum, arg);
784: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1.48 provos 785: arg = strdelim(&cp);
1.47 ho 786: if (!arg || *arg == '\0')
1.43 jakob 787: fatal("%s line %d: Missing subsystem command.",
788: filename, linenum);
1.47 ho 789: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.43 jakob 790: options->num_subsystems++;
1.25 markus 791: break;
1.46 markus 792:
793: case sMaxStartups:
1.50 markus 794: arg = strdelim(&cp);
795: if (!arg || *arg == '\0')
796: fatal("%s line %d: Missing MaxStartups spec.",
797: filename, linenum);
1.87 stevesk 798: if ((n = sscanf(arg, "%d:%d:%d",
1.50 markus 799: &options->max_startups_begin,
800: &options->max_startups_rate,
1.87 stevesk 801: &options->max_startups)) == 3) {
1.50 markus 802: if (options->max_startups_begin >
803: options->max_startups ||
804: options->max_startups_rate > 100 ||
805: options->max_startups_rate < 1)
1.87 stevesk 806: fatal("%s line %d: Illegal MaxStartups spec.",
807: filename, linenum);
808: } else if (n != 1)
1.50 markus 809: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 810: filename, linenum);
811: else
812: options->max_startups = options->max_startups_begin;
813: break;
1.25 markus 814:
1.57 markus 815: case sBanner:
816: charptr = &options->banner;
1.82 markus 817: goto parse_filename;
818: /*
819: * These options can contain %X options expanded at
820: * connect time, so that you can specify paths like:
821: *
822: * AuthorizedKeysFile /etc/ssh_keys/%u
823: */
824: case sAuthorizedKeysFile:
825: case sAuthorizedKeysFile2:
826: charptr = (opcode == sAuthorizedKeysFile ) ?
827: &options->authorized_keys_file :
828: &options->authorized_keys_file2;
1.57 markus 829: goto parse_filename;
1.81 stevesk 830:
1.77 beck 831: case sClientAliveInterval:
832: intptr = &options->client_alive_interval;
1.81 stevesk 833: goto parse_time;
834:
1.77 beck 835: case sClientAliveCountMax:
836: intptr = &options->client_alive_count_max;
837: goto parse_int;
1.89 jakob 838:
839: case sDeprecated:
840: log("%s line %d: Deprecated option %s",
841: filename, linenum, arg);
842: while(arg)
843: arg = strdelim(&cp);
844: break;
1.81 stevesk 845:
1.25 markus 846: default:
1.78 stevesk 847: fatal("%s line %d: Missing handler for opcode %s (%d)",
848: filename, linenum, arg, opcode);
1.13 markus 849: }
1.78 stevesk 850: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
851: fatal("%s line %d: garbage at end of line; \"%.200s\".",
852: filename, linenum, arg);
1.1 deraadt 853: }
1.25 markus 854: fclose(f);
1.78 stevesk 855: if (bad_options > 0)
856: fatal("%s: terminating, %d bad configuration options",
857: filename, bad_options);
1.1 deraadt 858: }
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