/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.zookeeper.server.util; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class KerberosUtil { public static String getDefaultRealm() throws ClassNotFoundException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException { Object kerbConf; Class<?> classRef; Method getInstanceMethod; Method getDefaultRealmMethod; if (System.getProperty("java.vendor").contains("IBM")) { classRef = Class.forName("com.ibm.security.krb5.internal.Config"); } else { classRef = Class.forName("sun.security.krb5.Config"); } getInstanceMethod = classRef.getMethod("getInstance", new Class[0]); kerbConf = getInstanceMethod.invoke(classRef, new Object[0]); getDefaultRealmMethod = classRef.getDeclaredMethod("getDefaultRealm", new Class[0]); return (String)getDefaultRealmMethod.invoke(kerbConf, new Object[0]); } }