1216 // if no DNS TXT records found, try again using sub-realm
1217 }
1218 if (records != null) {
1219 for (int i = 0; i < records.length; i++) {
1220 if (records[i].equalsIgnoreCase(mapRealm)) {
1221 return records[i];
1222 }
1223 }
1224 }
1225 return null;
1226 }
1227
1228 /**
1229 * Locate KDC using DNS
1230 *
1231 * @param realm the realm for which the master KDC is desired
1232 * @return the KDC
1233 */
1234 private String getKDCFromDNS(String realm) throws KrbException {
1235 // use DNS to locate KDC
1236 String kdcs = null;
1237 String[] srvs = null;
1238 // locate DNS SRV record using UDP
1239 if (DEBUG) {
1240 System.out.println("getKDCFromDNS using UDP");
1241 }
1242 srvs = KrbServiceLocator.getKerberosService(realm, "_udp");
1243 if (srvs == null) {
1244 // locate DNS SRV record using TCP
1245 if (DEBUG) {
1246 System.out.println("getKDCFromDNS using UDP");
1247 }
1248 srvs = KrbServiceLocator.getKerberosService(realm, "_tcp");
1249 }
1250 if (srvs == null) {
1251 // no DNS SRV records
1252 throw new KrbException(Krb5.KRB_ERR_GENERIC,
1253 "Unable to locate KDC for realm " + realm);
1254 }
1255 for (int i = 0; i < srvs.length; i++) {
1256 String value = srvs[i];
1257 for (int j = 0; j < srvs[i].length(); j++) {
1258 // filter the KDC name
1259 if (value.charAt(j) == ':') {
1260 kdcs = (value.substring(0, j)).trim();
1261 }
1262 }
1263 }
1264 return kdcs;
1265 }
1266
1267 private boolean fileExists(String name) {
1268 return java.security.AccessController.doPrivileged(
1269 new FileExistsAction(name));
1270 }
1271
1272 static class FileExistsAction
1273 implements java.security.PrivilegedAction<Boolean> {
1274
1275 private String fileName;
1276
1277 public FileExistsAction(String fileName) {
1278 this.fileName = fileName;
1279 }
1280
1281 public Boolean run() {
1282 return new File(fileName).exists();
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1216 // if no DNS TXT records found, try again using sub-realm
1217 }
1218 if (records != null) {
1219 for (int i = 0; i < records.length; i++) {
1220 if (records[i].equalsIgnoreCase(mapRealm)) {
1221 return records[i];
1222 }
1223 }
1224 }
1225 return null;
1226 }
1227
1228 /**
1229 * Locate KDC using DNS
1230 *
1231 * @param realm the realm for which the master KDC is desired
1232 * @return the KDC
1233 */
1234 private String getKDCFromDNS(String realm) throws KrbException {
1235 // use DNS to locate KDC
1236 String kdcs = "";
1237 String[] srvs = null;
1238 // locate DNS SRV record using UDP
1239 if (DEBUG) {
1240 System.out.println("getKDCFromDNS using UDP");
1241 }
1242 srvs = KrbServiceLocator.getKerberosService(realm, "_udp");
1243 if (srvs == null) {
1244 // locate DNS SRV record using TCP
1245 if (DEBUG) {
1246 System.out.println("getKDCFromDNS using TCP");
1247 }
1248 srvs = KrbServiceLocator.getKerberosService(realm, "_tcp");
1249 }
1250 if (srvs == null) {
1251 // no DNS SRV records
1252 throw new KrbException(Krb5.KRB_ERR_GENERIC,
1253 "Unable to locate KDC for realm " + realm);
1254 }
1255 for (int i = 0; i < srvs.length; i++) {
1256 kdcs += srvs[i] + " ";
1257 }
1258 kdcs = kdcs.trim();
1259 if (kdcs.equals("")) {
1260 return null;
1261 }
1262 return kdcs;
1263 }
1264
1265 private boolean fileExists(String name) {
1266 return java.security.AccessController.doPrivileged(
1267 new FileExistsAction(name));
1268 }
1269
1270 static class FileExistsAction
1271 implements java.security.PrivilegedAction<Boolean> {
1272
1273 private String fileName;
1274
1275 public FileExistsAction(String fileName) {
1276 this.fileName = fileName;
1277 }
1278
1279 public Boolean run() {
1280 return new File(fileName).exists();
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