service/auth/PamAuthenticationProviderImpl.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 net.sf.jpam.Pam;
0023 import org.apache.hadoop.hive.conf.HiveConf;
0024
0025 public class PamAuthenticationProviderImpl implements PasswdAuthenticationProvider {
0026
0027   private final String pamServiceNames;
0028
0029   PamAuthenticationProviderImpl() {
0030     HiveConf conf = new HiveConf();
0031     pamServiceNames = conf.getVar(HiveConf.ConfVars.HIVE_SERVER2_PAM_SERVICES);
0032   }
0033
0034   @Override
0035   public void Authenticate(String user, String password) throws AuthenticationException {
0036
0037     if (pamServiceNames == null || pamServiceNames.trim().isEmpty()) {
0038       throw new AuthenticationException("No PAM services are set.");
0039     }
0040
0041     String[] pamServices = pamServiceNames.split(",");
0042     for (String pamService : pamServices) {
0043       Pam pam = new Pam(pamService);
0044       boolean isAuthenticated = pam.authenticateSuccessful(user, password);
0045       if (!isAuthenticated) {
0046         throw new AuthenticationException(
0047           "Error authenticating with the PAM service: " + pamService);
0048       }
0049     }
0050   }
0051 }