service/auth/CustomAuthenticationProviderImpl.java

0001 /**
0002  * Licensed to the Apache Software Foundation (ASF) under one
0003  * or more contributor license agreements.  See the NOTICE file
0004  * distributed with this work for additional information
0005  * regarding copyright ownership.  The ASF licenses this file
0006  * to you under the Apache License, Version 2.0 (the
0007  * "License"); you may not use this file except in compliance
0008  * with the License.  You may obtain a copy of the License at
0009  *
0010  *     http://www.apache.org/licenses/LICENSE-2.0
0011  *
0012  * Unless required by applicable law or agreed to in writing, software
0013  * distributed under the License is distributed on an "AS IS" BASIS,
0014  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0015  * See the License for the specific language governing permissions and
0016  * limitations under the License.
0017  */
0018 package org.apache.hive.service.auth;
0019
0020 import javax.security.sasl.AuthenticationException;
0021
0022 import org.apache.hadoop.hive.conf.HiveConf;
0023 import org.apache.hadoop.util.ReflectionUtils;
0024
0025 /**
0026  * This authentication provider implements the {@code CUSTOM} authentication. It allows a {@link
0027  * PasswdAuthenticationProvider} to be specified at configuration time which may additionally
0028  * implement {@link org.apache.hadoop.conf.Configurable Configurable} to grab Hive's {@link
0029  * org.apache.hadoop.conf.Configuration Configuration}.
0030  */
0031 public class CustomAuthenticationProviderImpl implements PasswdAuthenticationProvider {
0032
0033   private final PasswdAuthenticationProvider customProvider;
0034
0035   @SuppressWarnings("unchecked")
0036   CustomAuthenticationProviderImpl() {
0037     HiveConf conf = new HiveConf();
0038     Class<? extends PasswdAuthenticationProvider> customHandlerClass =
0039       (Class<? extends PasswdAuthenticationProvider>) conf.getClass(
0040         HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.varname,
0041         PasswdAuthenticationProvider.class);
0042     customProvider = ReflectionUtils.newInstance(customHandlerClass, conf);
0043   }
0044
0045   @Override
0046   public void Authenticate(String user, String password) throws AuthenticationException {
0047     customProvider.Authenticate(user, password);
0048   }
0049
0050 }