Annotation of src/usr.bin/ssh/servconf.c, Revision 1.94
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"
1.94 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.93 2001/12/05 10:06:12 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;
1.83 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 },
1.92 stevesk 321: { NULL, sBadOption }
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:
1.94 ! markus 379: int
! 380: process_server_config_line(ServerOptions *options, char *line,
! 381: const char *filename, int linenum)
1.1 deraadt 382: {
1.74 stevesk 383: char *cp, **charptr, *arg, *p;
1.94 ! markus 384: int *intptr, value;
1.25 markus 385: ServerOpCodes opcode;
1.87 stevesk 386: int i, n;
1.25 markus 387:
1.94 ! markus 388: cp = line;
! 389: arg = strdelim(&cp);
! 390: /* Ignore leading whitespace */
! 391: if (*arg == '\0')
! 392: arg = strdelim(&cp);
! 393: if (!arg || !*arg || *arg == '#')
! 394: return 0;
! 395: intptr = NULL;
! 396: charptr = NULL;
! 397: opcode = parse_token(arg, filename, linenum);
! 398: switch (opcode) {
! 399: case sBadOption:
! 400: return -1;
! 401: case sPort:
! 402: /* ignore ports from configfile if cmdline specifies ports */
! 403: if (options->ports_from_cmdline)
! 404: return 0;
! 405: if (options->listen_addrs != NULL)
! 406: fatal("%s line %d: ports must be specified before "
! 407: "ListenAdress.", filename, linenum);
! 408: if (options->num_ports >= MAX_PORTS)
! 409: fatal("%s line %d: too many ports.",
! 410: filename, linenum);
1.48 provos 411: arg = strdelim(&cp);
1.94 ! markus 412: if (!arg || *arg == '\0')
! 413: fatal("%s line %d: missing port number.",
! 414: filename, linenum);
! 415: options->ports[options->num_ports++] = a2port(arg);
! 416: if (options->ports[options->num_ports-1] == 0)
! 417: fatal("%s line %d: Badly formatted port number.",
! 418: filename, linenum);
! 419: break;
1.29 markus 420:
1.94 ! markus 421: case sServerKeyBits:
! 422: intptr = &options->server_key_bits;
1.25 markus 423: parse_int:
1.94 ! markus 424: arg = strdelim(&cp);
! 425: if (!arg || *arg == '\0')
! 426: fatal("%s line %d: missing integer value.",
! 427: filename, linenum);
! 428: value = atoi(arg);
! 429: if (*intptr == -1)
! 430: *intptr = value;
! 431: break;
1.25 markus 432:
1.94 ! markus 433: case sLoginGraceTime:
! 434: intptr = &options->login_grace_time;
1.81 stevesk 435: parse_time:
1.94 ! markus 436: arg = strdelim(&cp);
! 437: if (!arg || *arg == '\0')
! 438: fatal("%s line %d: missing time value.",
! 439: filename, linenum);
! 440: if ((value = convtime(arg)) == -1)
! 441: fatal("%s line %d: invalid time value.",
! 442: filename, linenum);
! 443: if (*intptr == -1)
! 444: *intptr = value;
! 445: break;
! 446:
! 447: case sKeyRegenerationTime:
! 448: intptr = &options->key_regeneration_time;
! 449: goto parse_time;
! 450:
! 451: case sListenAddress:
! 452: arg = strdelim(&cp);
! 453: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
! 454: fatal("%s line %d: missing inet addr.",
! 455: filename, linenum);
! 456: if (*arg == '[') {
! 457: if ((p = strchr(arg, ']')) == NULL)
! 458: fatal("%s line %d: bad ipv6 inet addr usage.",
! 459: filename, linenum);
! 460: arg++;
! 461: memmove(p, p+1, strlen(p+1)+1);
! 462: } else if (((p = strchr(arg, ':')) == NULL) ||
! 463: (strchr(p+1, ':') != NULL)) {
! 464: add_listen_addr(options, arg, 0);
1.81 stevesk 465: break;
1.94 ! markus 466: }
! 467: if (*p == ':') {
! 468: u_short port;
1.25 markus 469:
1.94 ! markus 470: p++;
! 471: if (*p == '\0')
! 472: fatal("%s line %d: bad inet addr:port usage.",
! 473: filename, linenum);
! 474: else {
! 475: *(p-1) = '\0';
! 476: if ((port = a2port(p)) == 0)
! 477: fatal("%s line %d: bad port number.",
1.74 stevesk 478: filename, linenum);
1.94 ! markus 479: add_listen_addr(options, arg, port);
1.74 stevesk 480: }
1.94 ! markus 481: } else if (*p == '\0')
! 482: add_listen_addr(options, arg, 0);
! 483: else
! 484: fatal("%s line %d: bad inet addr usage.",
! 485: filename, linenum);
! 486: break;
! 487:
! 488: case sHostKeyFile:
! 489: intptr = &options->num_host_key_files;
! 490: if (*intptr >= MAX_HOSTKEYS)
! 491: fatal("%s line %d: too many host keys specified (max %d).",
! 492: filename, linenum, MAX_HOSTKEYS);
! 493: charptr = &options->host_key_files[*intptr];
! 494: parse_filename:
! 495: arg = strdelim(&cp);
! 496: if (!arg || *arg == '\0')
! 497: fatal("%s line %d: missing file name.",
! 498: filename, linenum);
! 499: if (*charptr == NULL) {
! 500: *charptr = tilde_expand_filename(arg, getuid());
! 501: /* increase optional counter */
! 502: if (intptr != NULL)
! 503: *intptr = *intptr + 1;
! 504: }
! 505: break;
1.76 stevesk 506:
1.94 ! markus 507: case sPidFile:
! 508: charptr = &options->pid_file;
! 509: goto parse_filename;
1.25 markus 510:
1.94 ! markus 511: case sPermitRootLogin:
! 512: intptr = &options->permit_root_login;
! 513: arg = strdelim(&cp);
! 514: if (!arg || *arg == '\0')
! 515: fatal("%s line %d: missing yes/"
! 516: "without-password/forced-commands-only/no "
! 517: "argument.", filename, linenum);
! 518: value = 0; /* silence compiler */
! 519: if (strcmp(arg, "without-password") == 0)
! 520: value = PERMIT_NO_PASSWD;
! 521: else if (strcmp(arg, "forced-commands-only") == 0)
! 522: value = PERMIT_FORCED_ONLY;
! 523: else if (strcmp(arg, "yes") == 0)
! 524: value = PERMIT_YES;
! 525: else if (strcmp(arg, "no") == 0)
! 526: value = PERMIT_NO;
! 527: else
! 528: fatal("%s line %d: Bad yes/"
! 529: "without-password/forced-commands-only/no "
! 530: "argument: %s", filename, linenum, arg);
! 531: if (*intptr == -1)
! 532: *intptr = value;
! 533: break;
1.36 markus 534:
1.94 ! markus 535: case sIgnoreRhosts:
! 536: intptr = &options->ignore_rhosts;
1.25 markus 537: parse_flag:
1.94 ! markus 538: arg = strdelim(&cp);
! 539: if (!arg || *arg == '\0')
! 540: fatal("%s line %d: missing yes/no argument.",
! 541: filename, linenum);
! 542: value = 0; /* silence compiler */
! 543: if (strcmp(arg, "yes") == 0)
! 544: value = 1;
! 545: else if (strcmp(arg, "no") == 0)
! 546: value = 0;
! 547: else
! 548: fatal("%s line %d: Bad yes/no argument: %s",
! 549: filename, linenum, arg);
! 550: if (*intptr == -1)
! 551: *intptr = value;
! 552: break;
! 553:
! 554: case sIgnoreUserKnownHosts:
! 555: intptr = &options->ignore_user_known_hosts;
! 556: goto parse_flag;
! 557:
! 558: case sRhostsAuthentication:
! 559: intptr = &options->rhosts_authentication;
! 560: goto parse_flag;
! 561:
! 562: case sRhostsRSAAuthentication:
! 563: intptr = &options->rhosts_rsa_authentication;
! 564: goto parse_flag;
! 565:
! 566: case sHostbasedAuthentication:
! 567: intptr = &options->hostbased_authentication;
! 568: goto parse_flag;
! 569:
! 570: case sHostbasedUsesNameFromPacketOnly:
! 571: intptr = &options->hostbased_uses_name_from_packet_only;
! 572: goto parse_flag;
! 573:
! 574: case sRSAAuthentication:
! 575: intptr = &options->rsa_authentication;
! 576: goto parse_flag;
! 577:
! 578: case sPubkeyAuthentication:
! 579: intptr = &options->pubkey_authentication;
! 580: goto parse_flag;
1.85 dugsong 581: #if defined(KRB4) || defined(KRB5)
1.94 ! markus 582: case sKerberosAuthentication:
! 583: intptr = &options->kerberos_authentication;
! 584: goto parse_flag;
! 585:
! 586: case sKerberosOrLocalPasswd:
! 587: intptr = &options->kerberos_or_local_passwd;
! 588: goto parse_flag;
! 589:
! 590: case sKerberosTicketCleanup:
! 591: intptr = &options->kerberos_ticket_cleanup;
! 592: goto parse_flag;
1.1 deraadt 593: #endif
1.85 dugsong 594: #if defined(AFS) || defined(KRB5)
1.94 ! markus 595: case sKerberosTgtPassing:
! 596: intptr = &options->kerberos_tgt_passing;
! 597: goto parse_flag;
1.85 dugsong 598: #endif
599: #ifdef AFS
1.94 ! markus 600: case sAFSTokenPassing:
! 601: intptr = &options->afs_token_passing;
! 602: goto parse_flag;
! 603: #endif
! 604:
! 605: case sPasswordAuthentication:
! 606: intptr = &options->password_authentication;
! 607: goto parse_flag;
! 608:
! 609: case sKbdInteractiveAuthentication:
! 610: intptr = &options->kbd_interactive_authentication;
! 611: goto parse_flag;
! 612:
! 613: case sChallengeResponseAuthentication:
! 614: intptr = &options->challenge_response_authentication;
! 615: goto parse_flag;
! 616:
! 617: case sPrintMotd:
! 618: intptr = &options->print_motd;
! 619: goto parse_flag;
! 620:
! 621: case sPrintLastLog:
! 622: intptr = &options->print_lastlog;
! 623: goto parse_flag;
! 624:
! 625: case sX11Forwarding:
! 626: intptr = &options->x11_forwarding;
! 627: goto parse_flag;
! 628:
! 629: case sX11DisplayOffset:
! 630: intptr = &options->x11_display_offset;
! 631: goto parse_int;
! 632:
! 633: case sXAuthLocation:
! 634: charptr = &options->xauth_location;
! 635: goto parse_filename;
! 636:
! 637: case sStrictModes:
! 638: intptr = &options->strict_modes;
! 639: goto parse_flag;
! 640:
! 641: case sKeepAlives:
! 642: intptr = &options->keepalives;
! 643: goto parse_flag;
! 644:
! 645: case sEmptyPasswd:
! 646: intptr = &options->permit_empty_passwd;
! 647: goto parse_flag;
! 648:
! 649: case sUseLogin:
! 650: intptr = &options->use_login;
! 651: goto parse_flag;
! 652:
! 653: case sGatewayPorts:
! 654: intptr = &options->gateway_ports;
! 655: goto parse_flag;
1.25 markus 656:
1.94 ! markus 657: case sReverseMappingCheck:
! 658: intptr = &options->reverse_mapping_check;
! 659: goto parse_flag;
1.53 markus 660:
1.94 ! markus 661: case sLogFacility:
! 662: intptr = (int *) &options->log_facility;
! 663: arg = strdelim(&cp);
! 664: value = log_facility_number(arg);
! 665: if (value == (SyslogFacility) - 1)
! 666: fatal("%.200s line %d: unsupported log facility '%s'",
! 667: filename, linenum, arg ? arg : "<NONE>");
! 668: if (*intptr == -1)
! 669: *intptr = (SyslogFacility) value;
! 670: break;
1.25 markus 671:
1.94 ! markus 672: case sLogLevel:
! 673: intptr = (int *) &options->log_level;
! 674: arg = strdelim(&cp);
! 675: value = log_level_number(arg);
! 676: if (value == (LogLevel) - 1)
! 677: fatal("%.200s line %d: unsupported log level '%s'",
! 678: filename, linenum, arg ? arg : "<NONE>");
! 679: if (*intptr == -1)
! 680: *intptr = (LogLevel) value;
! 681: break;
! 682:
! 683: case sAllowTcpForwarding:
! 684: intptr = &options->allow_tcp_forwarding;
! 685: goto parse_flag;
! 686:
! 687: case sAllowUsers:
! 688: while ((arg = strdelim(&cp)) && *arg != '\0') {
! 689: if (options->num_allow_users >= MAX_ALLOW_USERS)
! 690: fatal("%s line %d: too many allow users.",
! 691: filename, linenum);
! 692: options->allow_users[options->num_allow_users++] = xstrdup(arg);
! 693: }
! 694: break;
1.25 markus 695:
1.94 ! markus 696: case sDenyUsers:
! 697: while ((arg = strdelim(&cp)) && *arg != '\0') {
! 698: if (options->num_deny_users >= MAX_DENY_USERS)
! 699: fatal( "%s line %d: too many deny users.",
! 700: filename, linenum);
! 701: options->deny_users[options->num_deny_users++] = xstrdup(arg);
! 702: }
! 703: break;
1.25 markus 704:
1.94 ! markus 705: case sAllowGroups:
! 706: while ((arg = strdelim(&cp)) && *arg != '\0') {
! 707: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
! 708: fatal("%s line %d: too many allow groups.",
! 709: filename, linenum);
! 710: options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
! 711: }
! 712: break;
1.33 markus 713:
1.94 ! markus 714: case sDenyGroups:
! 715: while ((arg = strdelim(&cp)) && *arg != '\0') {
! 716: if (options->num_deny_groups >= MAX_DENY_GROUPS)
! 717: fatal("%s line %d: too many deny groups.",
! 718: filename, linenum);
! 719: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
! 720: }
! 721: break;
1.66 markus 722:
1.94 ! markus 723: case sCiphers:
! 724: arg = strdelim(&cp);
! 725: if (!arg || *arg == '\0')
! 726: fatal("%s line %d: Missing argument.", filename, linenum);
! 727: if (!ciphers_valid(arg))
! 728: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
! 729: filename, linenum, arg ? arg : "<NONE>");
! 730: if (options->ciphers == NULL)
! 731: options->ciphers = xstrdup(arg);
! 732: break;
1.33 markus 733:
1.94 ! markus 734: case sMacs:
! 735: arg = strdelim(&cp);
! 736: if (!arg || *arg == '\0')
! 737: fatal("%s line %d: Missing argument.", filename, linenum);
! 738: if (!mac_valid(arg))
! 739: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
! 740: filename, linenum, arg ? arg : "<NONE>");
! 741: if (options->macs == NULL)
! 742: options->macs = xstrdup(arg);
! 743: break;
1.43 jakob 744:
1.94 ! markus 745: case sProtocol:
! 746: intptr = &options->protocol;
! 747: arg = strdelim(&cp);
! 748: if (!arg || *arg == '\0')
! 749: fatal("%s line %d: Missing argument.", filename, linenum);
! 750: value = proto_spec(arg);
! 751: if (value == SSH_PROTO_UNKNOWN)
! 752: fatal("%s line %d: Bad protocol spec '%s'.",
! 753: filename, linenum, arg ? arg : "<NONE>");
! 754: if (*intptr == SSH_PROTO_UNKNOWN)
! 755: *intptr = value;
! 756: break;
! 757:
! 758: case sSubsystem:
! 759: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
! 760: fatal("%s line %d: too many subsystems defined.",
! 761: filename, linenum);
! 762: }
! 763: arg = strdelim(&cp);
! 764: if (!arg || *arg == '\0')
! 765: fatal("%s line %d: Missing subsystem name.",
! 766: filename, linenum);
! 767: for (i = 0; i < options->num_subsystems; i++)
! 768: if (strcmp(arg, options->subsystem_name[i]) == 0)
! 769: fatal("%s line %d: Subsystem '%s' already defined.",
! 770: filename, linenum, arg);
! 771: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
! 772: arg = strdelim(&cp);
! 773: if (!arg || *arg == '\0')
! 774: fatal("%s line %d: Missing subsystem command.",
! 775: filename, linenum);
! 776: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
! 777: options->num_subsystems++;
! 778: break;
1.46 markus 779:
1.94 ! markus 780: case sMaxStartups:
! 781: arg = strdelim(&cp);
! 782: if (!arg || *arg == '\0')
! 783: fatal("%s line %d: Missing MaxStartups spec.",
! 784: filename, linenum);
! 785: if ((n = sscanf(arg, "%d:%d:%d",
! 786: &options->max_startups_begin,
! 787: &options->max_startups_rate,
! 788: &options->max_startups)) == 3) {
! 789: if (options->max_startups_begin >
! 790: options->max_startups ||
! 791: options->max_startups_rate > 100 ||
! 792: options->max_startups_rate < 1)
1.50 markus 793: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 794: filename, linenum);
1.94 ! markus 795: } else if (n != 1)
! 796: fatal("%s line %d: Illegal MaxStartups spec.",
! 797: filename, linenum);
! 798: else
! 799: options->max_startups = options->max_startups_begin;
! 800: break;
! 801:
! 802: case sBanner:
! 803: charptr = &options->banner;
! 804: goto parse_filename;
! 805: /*
! 806: * These options can contain %X options expanded at
! 807: * connect time, so that you can specify paths like:
! 808: *
! 809: * AuthorizedKeysFile /etc/ssh_keys/%u
! 810: */
! 811: case sAuthorizedKeysFile:
! 812: case sAuthorizedKeysFile2:
! 813: charptr = (opcode == sAuthorizedKeysFile ) ?
! 814: &options->authorized_keys_file :
! 815: &options->authorized_keys_file2;
! 816: goto parse_filename;
! 817:
! 818: case sClientAliveInterval:
! 819: intptr = &options->client_alive_interval;
! 820: goto parse_time;
! 821:
! 822: case sClientAliveCountMax:
! 823: intptr = &options->client_alive_count_max;
! 824: goto parse_int;
! 825:
! 826: case sDeprecated:
! 827: log("%s line %d: Deprecated option %s",
! 828: filename, linenum, arg);
! 829: while (arg)
! 830: arg = strdelim(&cp);
! 831: break;
! 832:
! 833: default:
! 834: fatal("%s line %d: Missing handler for opcode %s (%d)",
! 835: filename, linenum, arg, opcode);
! 836: }
! 837: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
! 838: fatal("%s line %d: garbage at end of line; \"%.200s\".",
! 839: filename, linenum, arg);
! 840: return 0;
! 841: }
! 842:
! 843: /* Reads the server configuration file. */
1.25 markus 844:
1.94 ! markus 845: void
! 846: read_server_config(ServerOptions *options, const char *filename)
! 847: {
! 848: FILE *f;
! 849: char line[1024];
! 850: int linenum;
! 851: int bad_options = 0;
1.81 stevesk 852:
1.94 ! markus 853: f = fopen(filename, "r");
! 854: if (!f) {
! 855: perror(filename);
! 856: exit(1);
! 857: }
! 858: linenum = 0;
! 859: while (fgets(line, sizeof(line), f)) {
! 860: /* Update line number counter. */
! 861: linenum++;
! 862: if (process_server_config_line(options, line, filename, linenum) != 0)
! 863: bad_options++;
1.1 deraadt 864: }
1.25 markus 865: fclose(f);
1.78 stevesk 866: if (bad_options > 0)
867: fatal("%s: terminating, %d bad configuration options",
868: filename, bad_options);
1.1 deraadt 869: }
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