Annotation of src/usr.bin/ssh/servconf.c, Revision 1.115.2.2
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"
1.115.2.2! brad 13: RCSID("$OpenBSD: servconf.c,v 1.127 2003/09/01 18:15:50 markus Exp $");
1.1 deraadt 14:
15: #include "ssh.h"
1.62 markus 16: #include "log.h"
1.1 deraadt 17: #include "servconf.h"
18: #include "xmalloc.h"
1.33 markus 19: #include "compat.h"
1.60 markus 20: #include "pathnames.h"
1.62 markus 21: #include "tildexpand.h"
22: #include "misc.h"
23: #include "cipher.h"
1.66 markus 24: #include "kex.h"
25: #include "mac.h"
1.1 deraadt 26:
1.84 itojun 27: static void add_listen_addr(ServerOptions *, char *, u_short);
28: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 29:
1.62 markus 30: /* AF_UNSPEC or AF_INET or AF_INET6 */
31: extern int IPv4or6;
1.102 provos 32: /* Use of privilege separation or not */
33: extern int use_privsep;
1.62 markus 34:
1.1 deraadt 35: /* Initializes the server options to their default values. */
36:
1.34 markus 37: void
1.25 markus 38: initialize_server_options(ServerOptions *options)
1.1 deraadt 39: {
1.25 markus 40: memset(options, 0, sizeof(*options));
1.29 markus 41: options->num_ports = 0;
42: options->ports_from_cmdline = 0;
43: options->listen_addrs = NULL;
1.54 markus 44: options->num_host_key_files = 0;
1.36 markus 45: options->pid_file = NULL;
1.25 markus 46: options->server_key_bits = -1;
47: options->login_grace_time = -1;
48: options->key_regeneration_time = -1;
1.67 markus 49: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 50: options->ignore_rhosts = -1;
51: options->ignore_user_known_hosts = -1;
52: options->print_motd = -1;
1.72 stevesk 53: options->print_lastlog = -1;
1.25 markus 54: options->x11_forwarding = -1;
55: options->x11_display_offset = -1;
1.99 stevesk 56: options->x11_use_localhost = -1;
1.42 markus 57: options->xauth_location = NULL;
1.25 markus 58: options->strict_modes = -1;
59: options->keepalives = -1;
1.101 markus 60: options->log_facility = SYSLOG_FACILITY_NOT_SET;
61: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 62: options->rhosts_rsa_authentication = -1;
1.75 markus 63: options->hostbased_authentication = -1;
64: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 65: options->rsa_authentication = -1;
1.54 markus 66: options->pubkey_authentication = -1;
1.25 markus 67: options->kerberos_authentication = -1;
68: options->kerberos_or_local_passwd = -1;
69: options->kerberos_ticket_cleanup = -1;
1.115.2.2! brad 70: options->gss_authentication=-1;
! 71: options->gss_cleanup_creds = -1;
1.25 markus 72: options->password_authentication = -1;
1.52 markus 73: options->kbd_interactive_authentication = -1;
1.80 markus 74: options->challenge_response_authentication = -1;
1.25 markus 75: options->permit_empty_passwd = -1;
1.113 markus 76: options->permit_user_env = -1;
1.25 markus 77: options->use_login = -1;
1.111 markus 78: options->compression = -1;
1.53 markus 79: options->allow_tcp_forwarding = -1;
1.25 markus 80: options->num_allow_users = 0;
81: options->num_deny_users = 0;
82: options->num_allow_groups = 0;
83: options->num_deny_groups = 0;
1.33 markus 84: options->ciphers = NULL;
1.66 markus 85: options->macs = NULL;
1.33 markus 86: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 87: options->gateway_ports = -1;
1.43 jakob 88: options->num_subsystems = 0;
1.50 markus 89: options->max_startups_begin = -1;
90: options->max_startups_rate = -1;
1.46 markus 91: options->max_startups = -1;
1.57 markus 92: options->banner = NULL;
1.115.2.2! brad 93: options->use_dns = -1;
1.77 beck 94: options->client_alive_interval = -1;
95: options->client_alive_count_max = -1;
1.82 markus 96: options->authorized_keys_file = NULL;
97: options->authorized_keys_file2 = NULL;
1.102 provos 98:
99: /* Needs to be accessable in many places */
100: use_privsep = -1;
1.1 deraadt 101: }
102:
1.34 markus 103: void
1.25 markus 104: fill_default_server_options(ServerOptions *options)
1.1 deraadt 105: {
1.54 markus 106: if (options->protocol == SSH_PROTO_UNKNOWN)
107: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
108: if (options->num_host_key_files == 0) {
109: /* fill default hostkeys for protocols */
110: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 111: options->host_key_files[options->num_host_key_files++] =
112: _PATH_HOST_KEY_FILE;
113: if (options->protocol & SSH_PROTO_2) {
114: options->host_key_files[options->num_host_key_files++] =
115: _PATH_HOST_RSA_KEY_FILE;
116: options->host_key_files[options->num_host_key_files++] =
117: _PATH_HOST_DSA_KEY_FILE;
118: }
1.54 markus 119: }
1.29 markus 120: if (options->num_ports == 0)
121: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
122: if (options->listen_addrs == NULL)
1.76 stevesk 123: add_listen_addr(options, NULL, 0);
1.36 markus 124: if (options->pid_file == NULL)
1.60 markus 125: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 126: if (options->server_key_bits == -1)
127: options->server_key_bits = 768;
128: if (options->login_grace_time == -1)
1.115 stevesk 129: options->login_grace_time = 120;
1.25 markus 130: if (options->key_regeneration_time == -1)
131: options->key_regeneration_time = 3600;
1.67 markus 132: if (options->permit_root_login == PERMIT_NOT_SET)
133: options->permit_root_login = PERMIT_YES;
1.25 markus 134: if (options->ignore_rhosts == -1)
1.30 markus 135: options->ignore_rhosts = 1;
1.25 markus 136: if (options->ignore_user_known_hosts == -1)
137: options->ignore_user_known_hosts = 0;
138: if (options->print_motd == -1)
139: options->print_motd = 1;
1.72 stevesk 140: if (options->print_lastlog == -1)
141: options->print_lastlog = 1;
1.25 markus 142: if (options->x11_forwarding == -1)
1.30 markus 143: options->x11_forwarding = 0;
1.25 markus 144: if (options->x11_display_offset == -1)
1.30 markus 145: options->x11_display_offset = 10;
1.99 stevesk 146: if (options->x11_use_localhost == -1)
147: options->x11_use_localhost = 1;
1.42 markus 148: if (options->xauth_location == NULL)
1.83 markus 149: options->xauth_location = _PATH_XAUTH;
1.25 markus 150: if (options->strict_modes == -1)
151: options->strict_modes = 1;
152: if (options->keepalives == -1)
153: options->keepalives = 1;
1.101 markus 154: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 155: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 156: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 157: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 158: if (options->rhosts_rsa_authentication == -1)
1.30 markus 159: options->rhosts_rsa_authentication = 0;
1.75 markus 160: if (options->hostbased_authentication == -1)
161: options->hostbased_authentication = 0;
162: if (options->hostbased_uses_name_from_packet_only == -1)
163: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 164: if (options->rsa_authentication == -1)
165: options->rsa_authentication = 1;
1.54 markus 166: if (options->pubkey_authentication == -1)
167: options->pubkey_authentication = 1;
1.25 markus 168: if (options->kerberos_authentication == -1)
1.107 markus 169: options->kerberos_authentication = 0;
1.25 markus 170: if (options->kerberos_or_local_passwd == -1)
171: options->kerberos_or_local_passwd = 1;
172: if (options->kerberos_ticket_cleanup == -1)
173: options->kerberos_ticket_cleanup = 1;
1.115.2.2! brad 174: if (options->gss_authentication == -1)
! 175: options->gss_authentication = 0;
! 176: if (options->gss_cleanup_creds == -1)
! 177: options->gss_cleanup_creds = 1;
1.25 markus 178: if (options->password_authentication == -1)
179: options->password_authentication = 1;
1.52 markus 180: if (options->kbd_interactive_authentication == -1)
181: options->kbd_interactive_authentication = 0;
1.80 markus 182: if (options->challenge_response_authentication == -1)
183: options->challenge_response_authentication = 1;
1.25 markus 184: if (options->permit_empty_passwd == -1)
1.30 markus 185: options->permit_empty_passwd = 0;
1.113 markus 186: if (options->permit_user_env == -1)
187: options->permit_user_env = 0;
1.25 markus 188: if (options->use_login == -1)
189: options->use_login = 0;
1.111 markus 190: if (options->compression == -1)
191: options->compression = 1;
1.53 markus 192: if (options->allow_tcp_forwarding == -1)
193: options->allow_tcp_forwarding = 1;
1.38 markus 194: if (options->gateway_ports == -1)
195: options->gateway_ports = 0;
1.46 markus 196: if (options->max_startups == -1)
197: options->max_startups = 10;
1.50 markus 198: if (options->max_startups_rate == -1)
199: options->max_startups_rate = 100; /* 100% */
200: if (options->max_startups_begin == -1)
201: options->max_startups_begin = options->max_startups;
1.115.2.2! brad 202: if (options->use_dns == -1)
! 203: options->use_dns = 1;
1.77 beck 204: if (options->client_alive_interval == -1)
1.95 deraadt 205: options->client_alive_interval = 0;
1.77 beck 206: if (options->client_alive_count_max == -1)
207: options->client_alive_count_max = 3;
1.90 markus 208: if (options->authorized_keys_file2 == NULL) {
209: /* authorized_keys_file2 falls back to authorized_keys_file */
210: if (options->authorized_keys_file != NULL)
211: options->authorized_keys_file2 = options->authorized_keys_file;
212: else
213: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
214: }
215: if (options->authorized_keys_file == NULL)
216: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.102 provos 217:
1.110 markus 218: /* Turn privilege separation on by default */
1.102 provos 219: if (use_privsep == -1)
1.110 markus 220: use_privsep = 1;
1.1 deraadt 221: }
222:
223: /* Keyword tokens. */
1.25 markus 224: typedef enum {
225: sBadOption, /* == unknown option */
226: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
227: sPermitRootLogin, sLogFacility, sLogLevel,
1.115.2.2! brad 228: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 229: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.115.2.2! brad 230: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.52 markus 231: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 232: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 233: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.89 jakob 234: sStrictModes, sEmptyPasswd, sKeepAlives,
1.113 markus 235: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 236: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 237: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 238: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.115.2.2! brad 239: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 240: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 241: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.115.2.2! brad 242: sGssAuthentication, sGssCleanupCreds,
1.105 stevesk 243: sUsePrivilegeSeparation,
1.115.2.2! brad 244: sDeprecated, sUnsupported
1.1 deraadt 245: } ServerOpCodes;
246:
247: /* Textual representation of the tokens. */
1.25 markus 248: static struct {
249: const char *name;
250: ServerOpCodes opcode;
251: } keywords[] = {
252: { "port", sPort },
253: { "hostkey", sHostKeyFile },
1.54 markus 254: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 255: { "pidfile", sPidFile },
1.25 markus 256: { "serverkeybits", sServerKeyBits },
257: { "logingracetime", sLoginGraceTime },
258: { "keyregenerationinterval", sKeyRegenerationTime },
259: { "permitrootlogin", sPermitRootLogin },
260: { "syslogfacility", sLogFacility },
261: { "loglevel", sLogLevel },
1.115.2.2! brad 262: { "rhostsauthentication", sDeprecated },
1.25 markus 263: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 264: { "hostbasedauthentication", sHostbasedAuthentication },
265: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 266: { "rsaauthentication", sRSAAuthentication },
1.54 markus 267: { "pubkeyauthentication", sPubkeyAuthentication },
268: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.115.2.2! brad 269: #ifdef KRB5
1.25 markus 270: { "kerberosauthentication", sKerberosAuthentication },
271: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
272: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.115.2.2! brad 273: #else
! 274: { "kerberosauthentication", sUnsupported },
! 275: { "kerberosorlocalpasswd", sUnsupported },
! 276: { "kerberosticketcleanup", sUnsupported },
! 277: #endif
! 278: { "kerberostgtpassing", sUnsupported },
! 279: { "afstokenpassing", sUnsupported },
! 280: #ifdef GSSAPI
! 281: { "gssapiauthentication", sGssAuthentication },
! 282: { "gssapicleanupcreds", sGssCleanupCreds },
! 283: #else
! 284: { "gssapiauthentication", sUnsupported },
! 285: { "gssapicleanupcreds", sUnsupported },
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 },
1.99 stevesk 299: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 300: { "xauthlocation", sXAuthLocation },
1.25 markus 301: { "strictmodes", sStrictModes },
302: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 303: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 304: { "uselogin", sUseLogin },
1.111 markus 305: { "compression", sCompression },
1.25 markus 306: { "keepalive", sKeepAlives },
1.53 markus 307: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 308: { "allowusers", sAllowUsers },
309: { "denyusers", sDenyUsers },
310: { "allowgroups", sAllowGroups },
311: { "denygroups", sDenyGroups },
1.33 markus 312: { "ciphers", sCiphers },
1.66 markus 313: { "macs", sMacs },
1.33 markus 314: { "protocol", sProtocol },
1.38 markus 315: { "gatewayports", sGatewayPorts },
1.43 jakob 316: { "subsystem", sSubsystem },
1.46 markus 317: { "maxstartups", sMaxStartups },
1.57 markus 318: { "banner", sBanner },
1.115.2.2! brad 319: { "usedns", sUseDNS },
! 320: { "verifyreversemapping", sDeprecated },
! 321: { "reversemappingcheck", sDeprecated },
1.77 beck 322: { "clientaliveinterval", sClientAliveInterval },
323: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 324: { "authorizedkeysfile", sAuthorizedKeysFile },
325: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 326: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.92 stevesk 327: { NULL, sBadOption }
1.1 deraadt 328: };
329:
1.27 markus 330: /*
1.73 stevesk 331: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 332: */
1.1 deraadt 333:
1.34 markus 334: static ServerOpCodes
1.25 markus 335: parse_token(const char *cp, const char *filename,
336: int linenum)
1.1 deraadt 337: {
1.55 markus 338: u_int i;
1.1 deraadt 339:
1.25 markus 340: for (i = 0; keywords[i].name; i++)
1.28 markus 341: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 342: return keywords[i].opcode;
343:
1.78 stevesk 344: error("%s: line %d: Bad configuration option: %s",
345: filename, linenum, cp);
1.25 markus 346: return sBadOption;
1.1 deraadt 347: }
348:
1.84 itojun 349: static void
1.76 stevesk 350: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 351: {
352: int i;
353:
354: if (options->num_ports == 0)
355: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 356: if (port == 0)
1.74 stevesk 357: for (i = 0; i < options->num_ports; i++)
358: add_one_listen_addr(options, addr, options->ports[i]);
359: else
1.76 stevesk 360: add_one_listen_addr(options, addr, port);
1.74 stevesk 361: }
362:
1.84 itojun 363: static void
1.74 stevesk 364: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 365: {
366: struct addrinfo hints, *ai, *aitop;
367: char strport[NI_MAXSERV];
368: int gaierr;
369:
1.74 stevesk 370: memset(&hints, 0, sizeof(hints));
371: hints.ai_family = IPv4or6;
372: hints.ai_socktype = SOCK_STREAM;
373: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 374: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 375: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
376: fatal("bad addr or host: %s (%s)",
377: addr ? addr : "<NULL>",
378: gai_strerror(gaierr));
379: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
380: ;
381: ai->ai_next = options->listen_addrs;
382: options->listen_addrs = aitop;
1.29 markus 383: }
384:
1.94 markus 385: int
386: process_server_config_line(ServerOptions *options, char *line,
387: const char *filename, int linenum)
1.1 deraadt 388: {
1.74 stevesk 389: char *cp, **charptr, *arg, *p;
1.112 deraadt 390: int *intptr, value, i, n;
1.25 markus 391: ServerOpCodes opcode;
392:
1.94 markus 393: cp = line;
394: arg = strdelim(&cp);
395: /* Ignore leading whitespace */
396: if (*arg == '\0')
397: arg = strdelim(&cp);
398: if (!arg || !*arg || *arg == '#')
399: return 0;
400: intptr = NULL;
401: charptr = NULL;
402: opcode = parse_token(arg, filename, linenum);
403: switch (opcode) {
404: case sBadOption:
405: return -1;
406: case sPort:
407: /* ignore ports from configfile if cmdline specifies ports */
408: if (options->ports_from_cmdline)
409: return 0;
410: if (options->listen_addrs != NULL)
411: fatal("%s line %d: ports must be specified before "
1.98 stevesk 412: "ListenAddress.", filename, linenum);
1.94 markus 413: if (options->num_ports >= MAX_PORTS)
414: fatal("%s line %d: too many ports.",
415: filename, linenum);
1.48 provos 416: arg = strdelim(&cp);
1.94 markus 417: if (!arg || *arg == '\0')
418: fatal("%s line %d: missing port number.",
419: filename, linenum);
420: options->ports[options->num_ports++] = a2port(arg);
421: if (options->ports[options->num_ports-1] == 0)
422: fatal("%s line %d: Badly formatted port number.",
423: filename, linenum);
424: break;
1.29 markus 425:
1.94 markus 426: case sServerKeyBits:
427: intptr = &options->server_key_bits;
1.25 markus 428: parse_int:
1.94 markus 429: arg = strdelim(&cp);
430: if (!arg || *arg == '\0')
431: fatal("%s line %d: missing integer value.",
432: filename, linenum);
433: value = atoi(arg);
434: if (*intptr == -1)
435: *intptr = value;
436: break;
1.25 markus 437:
1.94 markus 438: case sLoginGraceTime:
439: intptr = &options->login_grace_time;
1.81 stevesk 440: parse_time:
1.94 markus 441: arg = strdelim(&cp);
442: if (!arg || *arg == '\0')
443: fatal("%s line %d: missing time value.",
444: filename, linenum);
445: if ((value = convtime(arg)) == -1)
446: fatal("%s line %d: invalid time value.",
447: filename, linenum);
448: if (*intptr == -1)
449: *intptr = value;
450: break;
451:
452: case sKeyRegenerationTime:
453: intptr = &options->key_regeneration_time;
454: goto parse_time;
455:
456: case sListenAddress:
457: arg = strdelim(&cp);
458: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
459: fatal("%s line %d: missing inet addr.",
460: filename, linenum);
461: if (*arg == '[') {
462: if ((p = strchr(arg, ']')) == NULL)
463: fatal("%s line %d: bad ipv6 inet addr usage.",
464: filename, linenum);
465: arg++;
466: memmove(p, p+1, strlen(p+1)+1);
467: } else if (((p = strchr(arg, ':')) == NULL) ||
468: (strchr(p+1, ':') != NULL)) {
469: add_listen_addr(options, arg, 0);
1.81 stevesk 470: break;
1.94 markus 471: }
472: if (*p == ':') {
473: u_short port;
1.25 markus 474:
1.94 markus 475: p++;
476: if (*p == '\0')
477: fatal("%s line %d: bad inet addr:port usage.",
478: filename, linenum);
479: else {
480: *(p-1) = '\0';
481: if ((port = a2port(p)) == 0)
482: fatal("%s line %d: bad port number.",
1.74 stevesk 483: filename, linenum);
1.94 markus 484: add_listen_addr(options, arg, port);
1.74 stevesk 485: }
1.94 markus 486: } else if (*p == '\0')
487: add_listen_addr(options, arg, 0);
488: else
489: fatal("%s line %d: bad inet addr usage.",
490: filename, linenum);
491: break;
492:
493: case sHostKeyFile:
494: intptr = &options->num_host_key_files;
495: if (*intptr >= MAX_HOSTKEYS)
496: fatal("%s line %d: too many host keys specified (max %d).",
497: filename, linenum, MAX_HOSTKEYS);
498: charptr = &options->host_key_files[*intptr];
499: parse_filename:
500: arg = strdelim(&cp);
501: if (!arg || *arg == '\0')
502: fatal("%s line %d: missing file name.",
503: filename, linenum);
504: if (*charptr == NULL) {
505: *charptr = tilde_expand_filename(arg, getuid());
506: /* increase optional counter */
507: if (intptr != NULL)
508: *intptr = *intptr + 1;
509: }
510: break;
1.76 stevesk 511:
1.94 markus 512: case sPidFile:
513: charptr = &options->pid_file;
514: goto parse_filename;
1.25 markus 515:
1.94 markus 516: case sPermitRootLogin:
517: intptr = &options->permit_root_login;
518: arg = strdelim(&cp);
519: if (!arg || *arg == '\0')
520: fatal("%s line %d: missing yes/"
521: "without-password/forced-commands-only/no "
522: "argument.", filename, linenum);
523: value = 0; /* silence compiler */
524: if (strcmp(arg, "without-password") == 0)
525: value = PERMIT_NO_PASSWD;
526: else if (strcmp(arg, "forced-commands-only") == 0)
527: value = PERMIT_FORCED_ONLY;
528: else if (strcmp(arg, "yes") == 0)
529: value = PERMIT_YES;
530: else if (strcmp(arg, "no") == 0)
531: value = PERMIT_NO;
532: else
533: fatal("%s line %d: Bad yes/"
534: "without-password/forced-commands-only/no "
535: "argument: %s", filename, linenum, arg);
536: if (*intptr == -1)
537: *intptr = value;
538: break;
1.36 markus 539:
1.94 markus 540: case sIgnoreRhosts:
541: intptr = &options->ignore_rhosts;
1.25 markus 542: parse_flag:
1.94 markus 543: arg = strdelim(&cp);
544: if (!arg || *arg == '\0')
545: fatal("%s line %d: missing yes/no argument.",
546: filename, linenum);
547: value = 0; /* silence compiler */
548: if (strcmp(arg, "yes") == 0)
549: value = 1;
550: else if (strcmp(arg, "no") == 0)
551: value = 0;
552: else
553: fatal("%s line %d: Bad yes/no argument: %s",
554: filename, linenum, arg);
555: if (*intptr == -1)
556: *intptr = value;
557: break;
558:
559: case sIgnoreUserKnownHosts:
560: intptr = &options->ignore_user_known_hosts;
561: goto parse_flag;
562:
563: case sRhostsRSAAuthentication:
564: intptr = &options->rhosts_rsa_authentication;
565: goto parse_flag;
566:
567: case sHostbasedAuthentication:
568: intptr = &options->hostbased_authentication;
569: goto parse_flag;
570:
571: case sHostbasedUsesNameFromPacketOnly:
572: intptr = &options->hostbased_uses_name_from_packet_only;
573: goto parse_flag;
574:
575: case sRSAAuthentication:
576: intptr = &options->rsa_authentication;
577: goto parse_flag;
578:
579: case sPubkeyAuthentication:
580: intptr = &options->pubkey_authentication;
581: goto parse_flag;
1.115.2.2! brad 582:
1.94 markus 583: case sKerberosAuthentication:
584: intptr = &options->kerberos_authentication;
585: goto parse_flag;
586:
587: case sKerberosOrLocalPasswd:
588: intptr = &options->kerberos_or_local_passwd;
589: goto parse_flag;
590:
591: case sKerberosTicketCleanup:
592: intptr = &options->kerberos_ticket_cleanup;
593: goto parse_flag;
1.115.2.2! brad 594:
! 595: case sGssAuthentication:
! 596: intptr = &options->gss_authentication;
1.94 markus 597: goto parse_flag;
1.115.2.2! brad 598:
! 599: case sGssCleanupCreds:
! 600: intptr = &options->gss_cleanup_creds;
1.94 markus 601: goto parse_flag;
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;
1.99 stevesk 630:
631: case sX11UseLocalhost:
632: intptr = &options->x11_use_localhost;
633: goto parse_flag;
1.94 markus 634:
635: case sXAuthLocation:
636: charptr = &options->xauth_location;
637: goto parse_filename;
638:
639: case sStrictModes:
640: intptr = &options->strict_modes;
641: goto parse_flag;
642:
643: case sKeepAlives:
644: intptr = &options->keepalives;
645: goto parse_flag;
646:
647: case sEmptyPasswd:
648: intptr = &options->permit_empty_passwd;
1.113 markus 649: goto parse_flag;
650:
651: case sPermitUserEnvironment:
652: intptr = &options->permit_user_env;
1.94 markus 653: goto parse_flag;
654:
655: case sUseLogin:
656: intptr = &options->use_login;
1.111 markus 657: goto parse_flag;
658:
659: case sCompression:
660: intptr = &options->compression;
1.94 markus 661: goto parse_flag;
662:
663: case sGatewayPorts:
664: intptr = &options->gateway_ports;
665: goto parse_flag;
1.25 markus 666:
1.115.2.2! brad 667: case sUseDNS:
! 668: intptr = &options->use_dns;
1.94 markus 669: goto parse_flag;
1.53 markus 670:
1.94 markus 671: case sLogFacility:
672: intptr = (int *) &options->log_facility;
673: arg = strdelim(&cp);
674: value = log_facility_number(arg);
1.101 markus 675: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 676: fatal("%.200s line %d: unsupported log facility '%s'",
677: filename, linenum, arg ? arg : "<NONE>");
678: if (*intptr == -1)
679: *intptr = (SyslogFacility) value;
680: break;
1.25 markus 681:
1.94 markus 682: case sLogLevel:
683: intptr = (int *) &options->log_level;
684: arg = strdelim(&cp);
685: value = log_level_number(arg);
1.101 markus 686: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 687: fatal("%.200s line %d: unsupported log level '%s'",
688: filename, linenum, arg ? arg : "<NONE>");
689: if (*intptr == -1)
690: *intptr = (LogLevel) value;
691: break;
692:
693: case sAllowTcpForwarding:
694: intptr = &options->allow_tcp_forwarding;
695: goto parse_flag;
1.102 provos 696:
697: case sUsePrivilegeSeparation:
698: intptr = &use_privsep;
699: goto parse_flag;
1.94 markus 700:
701: case sAllowUsers:
702: while ((arg = strdelim(&cp)) && *arg != '\0') {
703: if (options->num_allow_users >= MAX_ALLOW_USERS)
704: fatal("%s line %d: too many allow users.",
705: filename, linenum);
1.112 deraadt 706: options->allow_users[options->num_allow_users++] =
707: xstrdup(arg);
1.94 markus 708: }
709: break;
1.25 markus 710:
1.94 markus 711: case sDenyUsers:
712: while ((arg = strdelim(&cp)) && *arg != '\0') {
713: if (options->num_deny_users >= MAX_DENY_USERS)
714: fatal( "%s line %d: too many deny users.",
715: filename, linenum);
1.112 deraadt 716: options->deny_users[options->num_deny_users++] =
717: xstrdup(arg);
1.94 markus 718: }
719: break;
1.25 markus 720:
1.94 markus 721: case sAllowGroups:
722: while ((arg = strdelim(&cp)) && *arg != '\0') {
723: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
724: fatal("%s line %d: too many allow groups.",
725: filename, linenum);
1.112 deraadt 726: options->allow_groups[options->num_allow_groups++] =
727: xstrdup(arg);
1.94 markus 728: }
729: break;
1.33 markus 730:
1.94 markus 731: case sDenyGroups:
732: while ((arg = strdelim(&cp)) && *arg != '\0') {
733: if (options->num_deny_groups >= MAX_DENY_GROUPS)
734: fatal("%s line %d: too many deny groups.",
735: filename, linenum);
736: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
737: }
738: break;
1.66 markus 739:
1.94 markus 740: case sCiphers:
741: arg = strdelim(&cp);
742: if (!arg || *arg == '\0')
743: fatal("%s line %d: Missing argument.", filename, linenum);
744: if (!ciphers_valid(arg))
745: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
746: filename, linenum, arg ? arg : "<NONE>");
747: if (options->ciphers == NULL)
748: options->ciphers = xstrdup(arg);
749: break;
1.33 markus 750:
1.94 markus 751: case sMacs:
752: arg = strdelim(&cp);
753: if (!arg || *arg == '\0')
754: fatal("%s line %d: Missing argument.", filename, linenum);
755: if (!mac_valid(arg))
756: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
757: filename, linenum, arg ? arg : "<NONE>");
758: if (options->macs == NULL)
759: options->macs = xstrdup(arg);
760: break;
1.43 jakob 761:
1.94 markus 762: case sProtocol:
763: intptr = &options->protocol;
764: arg = strdelim(&cp);
765: if (!arg || *arg == '\0')
766: fatal("%s line %d: Missing argument.", filename, linenum);
767: value = proto_spec(arg);
768: if (value == SSH_PROTO_UNKNOWN)
769: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 770: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 771: if (*intptr == SSH_PROTO_UNKNOWN)
772: *intptr = value;
773: break;
774:
775: case sSubsystem:
776: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
777: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 778: filename, linenum);
1.94 markus 779: }
780: arg = strdelim(&cp);
781: if (!arg || *arg == '\0')
782: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 783: filename, linenum);
1.94 markus 784: for (i = 0; i < options->num_subsystems; i++)
785: if (strcmp(arg, options->subsystem_name[i]) == 0)
786: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 787: filename, linenum, arg);
1.94 markus 788: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
789: arg = strdelim(&cp);
790: if (!arg || *arg == '\0')
791: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 792: filename, linenum);
1.94 markus 793: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
794: options->num_subsystems++;
795: break;
1.46 markus 796:
1.94 markus 797: case sMaxStartups:
798: arg = strdelim(&cp);
799: if (!arg || *arg == '\0')
800: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 801: filename, linenum);
1.94 markus 802: if ((n = sscanf(arg, "%d:%d:%d",
803: &options->max_startups_begin,
804: &options->max_startups_rate,
805: &options->max_startups)) == 3) {
806: if (options->max_startups_begin >
807: options->max_startups ||
808: options->max_startups_rate > 100 ||
809: options->max_startups_rate < 1)
1.50 markus 810: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 811: filename, linenum);
1.94 markus 812: } else if (n != 1)
813: fatal("%s line %d: Illegal MaxStartups spec.",
814: filename, linenum);
815: else
816: options->max_startups = options->max_startups_begin;
817: break;
818:
819: case sBanner:
820: charptr = &options->banner;
821: goto parse_filename;
822: /*
823: * These options can contain %X options expanded at
824: * connect time, so that you can specify paths like:
825: *
826: * AuthorizedKeysFile /etc/ssh_keys/%u
827: */
828: case sAuthorizedKeysFile:
829: case sAuthorizedKeysFile2:
830: charptr = (opcode == sAuthorizedKeysFile ) ?
831: &options->authorized_keys_file :
832: &options->authorized_keys_file2;
833: goto parse_filename;
834:
835: case sClientAliveInterval:
836: intptr = &options->client_alive_interval;
837: goto parse_time;
838:
839: case sClientAliveCountMax:
840: intptr = &options->client_alive_count_max;
841: goto parse_int;
842:
843: case sDeprecated:
1.115.2.2! brad 844: logit("%s line %d: Deprecated option %s",
! 845: filename, linenum, arg);
! 846: while (arg)
! 847: arg = strdelim(&cp);
! 848: break;
! 849:
! 850: case sUnsupported:
! 851: logit("%s line %d: Unsupported option %s",
1.94 markus 852: filename, linenum, arg);
853: while (arg)
854: arg = strdelim(&cp);
855: break;
856:
857: default:
858: fatal("%s line %d: Missing handler for opcode %s (%d)",
859: filename, linenum, arg, opcode);
860: }
861: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
862: fatal("%s line %d: garbage at end of line; \"%.200s\".",
863: filename, linenum, arg);
864: return 0;
865: }
866:
867: /* Reads the server configuration file. */
1.25 markus 868:
1.94 markus 869: void
870: read_server_config(ServerOptions *options, const char *filename)
871: {
1.112 deraadt 872: int linenum, bad_options = 0;
873: char line[1024];
1.94 markus 874: FILE *f;
1.81 stevesk 875:
1.115.2.1 margarid 876: debug2("read_server_config: filename %s", filename);
1.94 markus 877: f = fopen(filename, "r");
878: if (!f) {
879: perror(filename);
880: exit(1);
881: }
882: linenum = 0;
883: while (fgets(line, sizeof(line), f)) {
884: /* Update line number counter. */
885: linenum++;
886: if (process_server_config_line(options, line, filename, linenum) != 0)
887: bad_options++;
1.1 deraadt 888: }
1.25 markus 889: fclose(f);
1.78 stevesk 890: if (bad_options > 0)
891: fatal("%s: terminating, %d bad configuration options",
892: filename, bad_options);
1.1 deraadt 893: }
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