Annotation of src/usr.bin/ssh/servconf.c, Revision 1.96
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"
1.96 ! stevesk 13: RCSID("$OpenBSD: servconf.c,v 1.95 2001/12/19 07:18:56 deraadt 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;
1.42 markus 147: if (options->xauth_location == NULL)
1.83 markus 148: options->xauth_location = _PATH_XAUTH;
1.25 markus 149: if (options->strict_modes == -1)
150: options->strict_modes = 1;
151: if (options->keepalives == -1)
152: options->keepalives = 1;
153: if (options->log_facility == (SyslogFacility) (-1))
154: options->log_facility = SYSLOG_FACILITY_AUTH;
155: if (options->log_level == (LogLevel) (-1))
1.58 markus 156: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 157: if (options->rhosts_authentication == -1)
158: options->rhosts_authentication = 0;
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;
1.85 dugsong 169: #if defined(KRB4) || defined(KRB5)
1.25 markus 170: if (options->kerberos_authentication == -1)
171: options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
172: if (options->kerberos_or_local_passwd == -1)
173: options->kerberos_or_local_passwd = 1;
174: if (options->kerberos_ticket_cleanup == -1)
175: options->kerberos_ticket_cleanup = 1;
1.85 dugsong 176: #endif
177: #if defined(AFS) || defined(KRB5)
1.25 markus 178: if (options->kerberos_tgt_passing == -1)
179: options->kerberos_tgt_passing = 0;
1.85 dugsong 180: #endif
1.95 deraadt 181: #ifdef AFS
1.25 markus 182: if (options->afs_token_passing == -1)
183: options->afs_token_passing = k_hasafs();
1.85 dugsong 184: #endif
1.25 markus 185: if (options->password_authentication == -1)
186: options->password_authentication = 1;
1.52 markus 187: if (options->kbd_interactive_authentication == -1)
188: options->kbd_interactive_authentication = 0;
1.80 markus 189: if (options->challenge_response_authentication == -1)
190: options->challenge_response_authentication = 1;
1.25 markus 191: if (options->permit_empty_passwd == -1)
1.30 markus 192: options->permit_empty_passwd = 0;
1.25 markus 193: if (options->use_login == -1)
194: options->use_login = 0;
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;
1.64 markus 205: if (options->reverse_mapping_check == -1)
206: options->reverse_mapping_check = 0;
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;
1.1 deraadt 220: }
221:
222: /* Keyword tokens. */
1.25 markus 223: typedef enum {
224: sBadOption, /* == unknown option */
225: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
226: sPermitRootLogin, sLogFacility, sLogLevel,
227: sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
1.85 dugsong 228: #if defined(KRB4) || defined(KRB5)
1.25 markus 229: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.1 deraadt 230: #endif
1.85 dugsong 231: #if defined(AFS) || defined(KRB5)
232: sKerberosTgtPassing,
233: #endif
1.1 deraadt 234: #ifdef AFS
1.85 dugsong 235: sAFSTokenPassing,
1.1 deraadt 236: #endif
1.63 markus 237: sChallengeResponseAuthentication,
1.52 markus 238: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 239: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
240: sX11Forwarding, sX11DisplayOffset,
1.89 jakob 241: sStrictModes, sEmptyPasswd, sKeepAlives,
1.53 markus 242: sUseLogin, sAllowTcpForwarding,
243: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 244: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 245: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.75 markus 246: sBanner, sReverseMappingCheck, sHostbasedAuthentication,
1.95 deraadt 247: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 248: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
249: sDeprecated
1.1 deraadt 250: } ServerOpCodes;
251:
252: /* Textual representation of the tokens. */
1.25 markus 253: static struct {
254: const char *name;
255: ServerOpCodes opcode;
256: } keywords[] = {
257: { "port", sPort },
258: { "hostkey", sHostKeyFile },
1.54 markus 259: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 260: { "pidfile", sPidFile },
1.25 markus 261: { "serverkeybits", sServerKeyBits },
262: { "logingracetime", sLoginGraceTime },
263: { "keyregenerationinterval", sKeyRegenerationTime },
264: { "permitrootlogin", sPermitRootLogin },
265: { "syslogfacility", sLogFacility },
266: { "loglevel", sLogLevel },
267: { "rhostsauthentication", sRhostsAuthentication },
268: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 269: { "hostbasedauthentication", sHostbasedAuthentication },
270: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 271: { "rsaauthentication", sRSAAuthentication },
1.54 markus 272: { "pubkeyauthentication", sPubkeyAuthentication },
273: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.85 dugsong 274: #if defined(KRB4) || defined(KRB5)
1.25 markus 275: { "kerberosauthentication", sKerberosAuthentication },
276: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
277: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.1 deraadt 278: #endif
1.85 dugsong 279: #if defined(AFS) || defined(KRB5)
280: { "kerberostgtpassing", sKerberosTgtPassing },
281: #endif
1.4 dugsong 282: #ifdef AFS
1.25 markus 283: { "afstokenpassing", sAFSTokenPassing },
1.1 deraadt 284: #endif
1.25 markus 285: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 286: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 287: { "challengeresponseauthentication", sChallengeResponseAuthentication },
288: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 289: { "checkmail", sDeprecated },
1.25 markus 290: { "listenaddress", sListenAddress },
291: { "printmotd", sPrintMotd },
1.72 stevesk 292: { "printlastlog", sPrintLastLog },
1.25 markus 293: { "ignorerhosts", sIgnoreRhosts },
294: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
295: { "x11forwarding", sX11Forwarding },
296: { "x11displayoffset", sX11DisplayOffset },
1.42 markus 297: { "xauthlocation", sXAuthLocation },
1.25 markus 298: { "strictmodes", sStrictModes },
299: { "permitemptypasswords", sEmptyPasswd },
300: { "uselogin", sUseLogin },
301: { "keepalive", sKeepAlives },
1.53 markus 302: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 303: { "allowusers", sAllowUsers },
304: { "denyusers", sDenyUsers },
305: { "allowgroups", sAllowGroups },
306: { "denygroups", sDenyGroups },
1.33 markus 307: { "ciphers", sCiphers },
1.66 markus 308: { "macs", sMacs },
1.33 markus 309: { "protocol", sProtocol },
1.38 markus 310: { "gatewayports", sGatewayPorts },
1.43 jakob 311: { "subsystem", sSubsystem },
1.46 markus 312: { "maxstartups", sMaxStartups },
1.57 markus 313: { "banner", sBanner },
1.64 markus 314: { "reversemappingcheck", sReverseMappingCheck },
1.77 beck 315: { "clientaliveinterval", sClientAliveInterval },
316: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 317: { "authorizedkeysfile", sAuthorizedKeysFile },
318: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.92 stevesk 319: { NULL, sBadOption }
1.1 deraadt 320: };
321:
1.27 markus 322: /*
1.73 stevesk 323: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 324: */
1.1 deraadt 325:
1.34 markus 326: static ServerOpCodes
1.25 markus 327: parse_token(const char *cp, const char *filename,
328: int linenum)
1.1 deraadt 329: {
1.55 markus 330: u_int i;
1.1 deraadt 331:
1.25 markus 332: for (i = 0; keywords[i].name; i++)
1.28 markus 333: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 334: return keywords[i].opcode;
335:
1.78 stevesk 336: error("%s: line %d: Bad configuration option: %s",
337: filename, linenum, cp);
1.25 markus 338: return sBadOption;
1.1 deraadt 339: }
340:
1.84 itojun 341: static void
1.76 stevesk 342: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 343: {
344: int i;
345:
346: if (options->num_ports == 0)
347: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 348: if (port == 0)
1.74 stevesk 349: for (i = 0; i < options->num_ports; i++)
350: add_one_listen_addr(options, addr, options->ports[i]);
351: else
1.76 stevesk 352: add_one_listen_addr(options, addr, port);
1.74 stevesk 353: }
354:
1.84 itojun 355: static void
1.74 stevesk 356: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 357: {
358: struct addrinfo hints, *ai, *aitop;
359: char strport[NI_MAXSERV];
360: int gaierr;
361:
1.74 stevesk 362: memset(&hints, 0, sizeof(hints));
363: hints.ai_family = IPv4or6;
364: hints.ai_socktype = SOCK_STREAM;
365: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
366: snprintf(strport, sizeof strport, "%d", port);
367: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
368: fatal("bad addr or host: %s (%s)",
369: addr ? addr : "<NULL>",
370: gai_strerror(gaierr));
371: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
372: ;
373: ai->ai_next = options->listen_addrs;
374: options->listen_addrs = aitop;
1.29 markus 375: }
376:
1.94 markus 377: int
378: process_server_config_line(ServerOptions *options, char *line,
379: const char *filename, int linenum)
1.1 deraadt 380: {
1.74 stevesk 381: char *cp, **charptr, *arg, *p;
1.94 markus 382: int *intptr, value;
1.25 markus 383: ServerOpCodes opcode;
1.87 stevesk 384: int i, n;
1.25 markus 385:
1.94 markus 386: cp = line;
387: arg = strdelim(&cp);
388: /* Ignore leading whitespace */
389: if (*arg == '\0')
390: arg = strdelim(&cp);
391: if (!arg || !*arg || *arg == '#')
392: return 0;
393: intptr = NULL;
394: charptr = NULL;
395: opcode = parse_token(arg, filename, linenum);
396: switch (opcode) {
397: case sBadOption:
398: return -1;
399: case sPort:
400: /* ignore ports from configfile if cmdline specifies ports */
401: if (options->ports_from_cmdline)
402: return 0;
403: if (options->listen_addrs != NULL)
404: fatal("%s line %d: ports must be specified before "
405: "ListenAdress.", filename, linenum);
406: if (options->num_ports >= MAX_PORTS)
407: fatal("%s line %d: too many ports.",
408: filename, linenum);
1.48 provos 409: arg = strdelim(&cp);
1.94 markus 410: if (!arg || *arg == '\0')
411: fatal("%s line %d: missing port number.",
412: filename, linenum);
413: options->ports[options->num_ports++] = a2port(arg);
414: if (options->ports[options->num_ports-1] == 0)
415: fatal("%s line %d: Badly formatted port number.",
416: filename, linenum);
417: break;
1.29 markus 418:
1.94 markus 419: case sServerKeyBits:
420: intptr = &options->server_key_bits;
1.25 markus 421: parse_int:
1.94 markus 422: arg = strdelim(&cp);
423: if (!arg || *arg == '\0')
424: fatal("%s line %d: missing integer value.",
425: filename, linenum);
426: value = atoi(arg);
427: if (*intptr == -1)
428: *intptr = value;
429: break;
1.25 markus 430:
1.94 markus 431: case sLoginGraceTime:
432: intptr = &options->login_grace_time;
1.81 stevesk 433: parse_time:
1.94 markus 434: arg = strdelim(&cp);
435: if (!arg || *arg == '\0')
436: fatal("%s line %d: missing time value.",
437: filename, linenum);
438: if ((value = convtime(arg)) == -1)
439: fatal("%s line %d: invalid time value.",
440: filename, linenum);
441: if (*intptr == -1)
442: *intptr = value;
443: break;
444:
445: case sKeyRegenerationTime:
446: intptr = &options->key_regeneration_time;
447: goto parse_time;
448:
449: case sListenAddress:
450: arg = strdelim(&cp);
451: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
452: fatal("%s line %d: missing inet addr.",
453: filename, linenum);
454: if (*arg == '[') {
455: if ((p = strchr(arg, ']')) == NULL)
456: fatal("%s line %d: bad ipv6 inet addr usage.",
457: filename, linenum);
458: arg++;
459: memmove(p, p+1, strlen(p+1)+1);
460: } else if (((p = strchr(arg, ':')) == NULL) ||
461: (strchr(p+1, ':') != NULL)) {
462: add_listen_addr(options, arg, 0);
1.81 stevesk 463: break;
1.94 markus 464: }
465: if (*p == ':') {
466: u_short port;
1.25 markus 467:
1.94 markus 468: p++;
469: if (*p == '\0')
470: fatal("%s line %d: bad inet addr:port usage.",
471: filename, linenum);
472: else {
473: *(p-1) = '\0';
474: if ((port = a2port(p)) == 0)
475: fatal("%s line %d: bad port number.",
1.74 stevesk 476: filename, linenum);
1.94 markus 477: add_listen_addr(options, arg, port);
1.74 stevesk 478: }
1.94 markus 479: } else if (*p == '\0')
480: add_listen_addr(options, arg, 0);
481: else
482: fatal("%s line %d: bad inet addr usage.",
483: filename, linenum);
484: break;
485:
486: case sHostKeyFile:
487: intptr = &options->num_host_key_files;
488: if (*intptr >= MAX_HOSTKEYS)
489: fatal("%s line %d: too many host keys specified (max %d).",
490: filename, linenum, MAX_HOSTKEYS);
491: charptr = &options->host_key_files[*intptr];
492: parse_filename:
493: arg = strdelim(&cp);
494: if (!arg || *arg == '\0')
495: fatal("%s line %d: missing file name.",
496: filename, linenum);
497: if (*charptr == NULL) {
498: *charptr = tilde_expand_filename(arg, getuid());
499: /* increase optional counter */
500: if (intptr != NULL)
501: *intptr = *intptr + 1;
502: }
503: break;
1.76 stevesk 504:
1.94 markus 505: case sPidFile:
506: charptr = &options->pid_file;
507: goto parse_filename;
1.25 markus 508:
1.94 markus 509: case sPermitRootLogin:
510: intptr = &options->permit_root_login;
511: arg = strdelim(&cp);
512: if (!arg || *arg == '\0')
513: fatal("%s line %d: missing yes/"
514: "without-password/forced-commands-only/no "
515: "argument.", filename, linenum);
516: value = 0; /* silence compiler */
517: if (strcmp(arg, "without-password") == 0)
518: value = PERMIT_NO_PASSWD;
519: else if (strcmp(arg, "forced-commands-only") == 0)
520: value = PERMIT_FORCED_ONLY;
521: else if (strcmp(arg, "yes") == 0)
522: value = PERMIT_YES;
523: else if (strcmp(arg, "no") == 0)
524: value = PERMIT_NO;
525: else
526: fatal("%s line %d: Bad yes/"
527: "without-password/forced-commands-only/no "
528: "argument: %s", filename, linenum, arg);
529: if (*intptr == -1)
530: *intptr = value;
531: break;
1.36 markus 532:
1.94 markus 533: case sIgnoreRhosts:
534: intptr = &options->ignore_rhosts;
1.25 markus 535: parse_flag:
1.94 markus 536: arg = strdelim(&cp);
537: if (!arg || *arg == '\0')
538: fatal("%s line %d: missing yes/no argument.",
539: filename, linenum);
540: value = 0; /* silence compiler */
541: if (strcmp(arg, "yes") == 0)
542: value = 1;
543: else if (strcmp(arg, "no") == 0)
544: value = 0;
545: else
546: fatal("%s line %d: Bad yes/no argument: %s",
547: filename, linenum, arg);
548: if (*intptr == -1)
549: *intptr = value;
550: break;
551:
552: case sIgnoreUserKnownHosts:
553: intptr = &options->ignore_user_known_hosts;
554: goto parse_flag;
555:
556: case sRhostsAuthentication:
557: intptr = &options->rhosts_authentication;
558: goto parse_flag;
559:
560: case sRhostsRSAAuthentication:
561: intptr = &options->rhosts_rsa_authentication;
562: goto parse_flag;
563:
564: case sHostbasedAuthentication:
565: intptr = &options->hostbased_authentication;
566: goto parse_flag;
567:
568: case sHostbasedUsesNameFromPacketOnly:
569: intptr = &options->hostbased_uses_name_from_packet_only;
570: goto parse_flag;
571:
572: case sRSAAuthentication:
573: intptr = &options->rsa_authentication;
574: goto parse_flag;
575:
576: case sPubkeyAuthentication:
577: intptr = &options->pubkey_authentication;
578: goto parse_flag;
1.85 dugsong 579: #if defined(KRB4) || defined(KRB5)
1.94 markus 580: case sKerberosAuthentication:
581: intptr = &options->kerberos_authentication;
582: goto parse_flag;
583:
584: case sKerberosOrLocalPasswd:
585: intptr = &options->kerberos_or_local_passwd;
586: goto parse_flag;
587:
588: case sKerberosTicketCleanup:
589: intptr = &options->kerberos_ticket_cleanup;
590: goto parse_flag;
1.1 deraadt 591: #endif
1.85 dugsong 592: #if defined(AFS) || defined(KRB5)
1.94 markus 593: case sKerberosTgtPassing:
594: intptr = &options->kerberos_tgt_passing;
595: goto parse_flag;
1.85 dugsong 596: #endif
597: #ifdef AFS
1.94 markus 598: case sAFSTokenPassing:
599: intptr = &options->afs_token_passing;
600: goto parse_flag;
601: #endif
602:
603: case sPasswordAuthentication:
604: intptr = &options->password_authentication;
605: goto parse_flag;
606:
607: case sKbdInteractiveAuthentication:
608: intptr = &options->kbd_interactive_authentication;
609: goto parse_flag;
610:
611: case sChallengeResponseAuthentication:
612: intptr = &options->challenge_response_authentication;
613: goto parse_flag;
614:
615: case sPrintMotd:
616: intptr = &options->print_motd;
617: goto parse_flag;
618:
619: case sPrintLastLog:
620: intptr = &options->print_lastlog;
621: goto parse_flag;
622:
623: case sX11Forwarding:
624: intptr = &options->x11_forwarding;
625: goto parse_flag;
626:
627: case sX11DisplayOffset:
628: intptr = &options->x11_display_offset;
629: goto parse_int;
630:
631: case sXAuthLocation:
632: charptr = &options->xauth_location;
633: goto parse_filename;
634:
635: case sStrictModes:
636: intptr = &options->strict_modes;
637: goto parse_flag;
638:
639: case sKeepAlives:
640: intptr = &options->keepalives;
641: goto parse_flag;
642:
643: case sEmptyPasswd:
644: intptr = &options->permit_empty_passwd;
645: goto parse_flag;
646:
647: case sUseLogin:
648: intptr = &options->use_login;
649: goto parse_flag;
650:
651: case sGatewayPorts:
652: intptr = &options->gateway_ports;
653: goto parse_flag;
1.25 markus 654:
1.94 markus 655: case sReverseMappingCheck:
656: intptr = &options->reverse_mapping_check;
657: goto parse_flag;
1.53 markus 658:
1.94 markus 659: case sLogFacility:
660: intptr = (int *) &options->log_facility;
661: arg = strdelim(&cp);
662: value = log_facility_number(arg);
663: if (value == (SyslogFacility) - 1)
664: fatal("%.200s line %d: unsupported log facility '%s'",
665: filename, linenum, arg ? arg : "<NONE>");
666: if (*intptr == -1)
667: *intptr = (SyslogFacility) value;
668: break;
1.25 markus 669:
1.94 markus 670: case sLogLevel:
671: intptr = (int *) &options->log_level;
672: arg = strdelim(&cp);
673: value = log_level_number(arg);
674: if (value == (LogLevel) - 1)
675: fatal("%.200s line %d: unsupported log level '%s'",
676: filename, linenum, arg ? arg : "<NONE>");
677: if (*intptr == -1)
678: *intptr = (LogLevel) value;
679: break;
680:
681: case sAllowTcpForwarding:
682: intptr = &options->allow_tcp_forwarding;
683: goto parse_flag;
684:
685: case sAllowUsers:
686: while ((arg = strdelim(&cp)) && *arg != '\0') {
687: if (options->num_allow_users >= MAX_ALLOW_USERS)
688: fatal("%s line %d: too many allow users.",
689: filename, linenum);
690: options->allow_users[options->num_allow_users++] = xstrdup(arg);
691: }
692: break;
1.25 markus 693:
1.94 markus 694: case sDenyUsers:
695: while ((arg = strdelim(&cp)) && *arg != '\0') {
696: if (options->num_deny_users >= MAX_DENY_USERS)
697: fatal( "%s line %d: too many deny users.",
698: filename, linenum);
699: options->deny_users[options->num_deny_users++] = xstrdup(arg);
700: }
701: break;
1.25 markus 702:
1.94 markus 703: case sAllowGroups:
704: while ((arg = strdelim(&cp)) && *arg != '\0') {
705: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
706: fatal("%s line %d: too many allow groups.",
707: filename, linenum);
708: options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
709: }
710: break;
1.33 markus 711:
1.94 markus 712: case sDenyGroups:
713: while ((arg = strdelim(&cp)) && *arg != '\0') {
714: if (options->num_deny_groups >= MAX_DENY_GROUPS)
715: fatal("%s line %d: too many deny groups.",
716: filename, linenum);
717: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
718: }
719: break;
1.66 markus 720:
1.94 markus 721: case sCiphers:
722: arg = strdelim(&cp);
723: if (!arg || *arg == '\0')
724: fatal("%s line %d: Missing argument.", filename, linenum);
725: if (!ciphers_valid(arg))
726: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
727: filename, linenum, arg ? arg : "<NONE>");
728: if (options->ciphers == NULL)
729: options->ciphers = xstrdup(arg);
730: break;
1.33 markus 731:
1.94 markus 732: case sMacs:
733: arg = strdelim(&cp);
734: if (!arg || *arg == '\0')
735: fatal("%s line %d: Missing argument.", filename, linenum);
736: if (!mac_valid(arg))
737: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
738: filename, linenum, arg ? arg : "<NONE>");
739: if (options->macs == NULL)
740: options->macs = xstrdup(arg);
741: break;
1.43 jakob 742:
1.94 markus 743: case sProtocol:
744: intptr = &options->protocol;
745: arg = strdelim(&cp);
746: if (!arg || *arg == '\0')
747: fatal("%s line %d: Missing argument.", filename, linenum);
748: value = proto_spec(arg);
749: if (value == SSH_PROTO_UNKNOWN)
750: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 751: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 752: if (*intptr == SSH_PROTO_UNKNOWN)
753: *intptr = value;
754: break;
755:
756: case sSubsystem:
757: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
758: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 759: filename, linenum);
1.94 markus 760: }
761: arg = strdelim(&cp);
762: if (!arg || *arg == '\0')
763: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 764: filename, linenum);
1.94 markus 765: for (i = 0; i < options->num_subsystems; i++)
766: if (strcmp(arg, options->subsystem_name[i]) == 0)
767: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 768: filename, linenum, arg);
1.94 markus 769: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
770: arg = strdelim(&cp);
771: if (!arg || *arg == '\0')
772: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 773: filename, linenum);
1.94 markus 774: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
775: options->num_subsystems++;
776: break;
1.46 markus 777:
1.94 markus 778: case sMaxStartups:
779: arg = strdelim(&cp);
780: if (!arg || *arg == '\0')
781: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 782: filename, linenum);
1.94 markus 783: if ((n = sscanf(arg, "%d:%d:%d",
784: &options->max_startups_begin,
785: &options->max_startups_rate,
786: &options->max_startups)) == 3) {
787: if (options->max_startups_begin >
788: options->max_startups ||
789: options->max_startups_rate > 100 ||
790: options->max_startups_rate < 1)
1.50 markus 791: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 792: filename, linenum);
1.94 markus 793: } else if (n != 1)
794: fatal("%s line %d: Illegal MaxStartups spec.",
795: filename, linenum);
796: else
797: options->max_startups = options->max_startups_begin;
798: break;
799:
800: case sBanner:
801: charptr = &options->banner;
802: goto parse_filename;
803: /*
804: * These options can contain %X options expanded at
805: * connect time, so that you can specify paths like:
806: *
807: * AuthorizedKeysFile /etc/ssh_keys/%u
808: */
809: case sAuthorizedKeysFile:
810: case sAuthorizedKeysFile2:
811: charptr = (opcode == sAuthorizedKeysFile ) ?
812: &options->authorized_keys_file :
813: &options->authorized_keys_file2;
814: goto parse_filename;
815:
816: case sClientAliveInterval:
817: intptr = &options->client_alive_interval;
818: goto parse_time;
819:
820: case sClientAliveCountMax:
821: intptr = &options->client_alive_count_max;
822: goto parse_int;
823:
824: case sDeprecated:
825: log("%s line %d: Deprecated option %s",
826: filename, linenum, arg);
827: while (arg)
828: arg = strdelim(&cp);
829: break;
830:
831: default:
832: fatal("%s line %d: Missing handler for opcode %s (%d)",
833: filename, linenum, arg, opcode);
834: }
835: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
836: fatal("%s line %d: garbage at end of line; \"%.200s\".",
837: filename, linenum, arg);
838: return 0;
839: }
840:
841: /* Reads the server configuration file. */
1.25 markus 842:
1.94 markus 843: void
844: read_server_config(ServerOptions *options, const char *filename)
845: {
846: FILE *f;
847: char line[1024];
848: int linenum;
849: int bad_options = 0;
1.81 stevesk 850:
1.94 markus 851: f = fopen(filename, "r");
852: if (!f) {
853: perror(filename);
854: exit(1);
855: }
856: linenum = 0;
857: while (fgets(line, sizeof(line), f)) {
858: /* Update line number counter. */
859: linenum++;
860: if (process_server_config_line(options, line, filename, linenum) != 0)
861: bad_options++;
1.1 deraadt 862: }
1.25 markus 863: fclose(f);
1.78 stevesk 864: if (bad_options > 0)
865: fatal("%s: terminating, %d bad configuration options",
866: filename, bad_options);
1.1 deraadt 867: }
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