| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.ambari.view.hive20; |
| |
| import org.apache.ambari.view.ViewContext; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Holds session parameters pulled from the |
| * view context |
| */ |
| public class AuthParams { |
| private static final String HIVE_SESSION_PARAMS = "hive.session.params"; |
| private Map<String, String> sessionParams = new HashMap<>(); |
| private final ViewContext context; |
| |
| public AuthParams(ViewContext context) { |
| sessionParams = parseSessionParams(context.getProperties().get(HIVE_SESSION_PARAMS)); |
| this.context = context; |
| } |
| |
| /** |
| * Returns a map created by parsing the parameters in view context |
| * @param params session parameters as string |
| * @return parsed session parameters |
| */ |
| private Map<String, String> parseSessionParams(String params) { |
| Map<String, String> sessions = new HashMap<>(); |
| if (StringUtils.isEmpty(params)) |
| return sessions; |
| String[] splits = params.split(";"); |
| for (String split : splits) { |
| String[] paramSplit = split.trim().split("="); |
| if ("auth".equals(paramSplit[0]) || "proxyuser".equals(paramSplit[0])) { |
| sessions.put(paramSplit[0], paramSplit[1]); |
| } |
| } |
| return Collections.unmodifiableMap(sessions); |
| } |
| |
| /** |
| * Gets the proxy user |
| * @return User and group information |
| * @throws IOException |
| */ |
| public UserGroupInformation getProxyUser() throws IOException { |
| UserGroupInformation ugi; |
| String proxyuser = null; |
| |
| UserGroupInformation.isSecurityEnabled(); |
| if(context.getCluster() != null) { |
| proxyuser = context.getCluster().getConfigurationValue("cluster-env","ambari_principal_name"); |
| } |
| |
| if(StringUtils.isEmpty(proxyuser)) { |
| if (sessionParams.containsKey("proxyuser")) { |
| ugi = UserGroupInformation.createRemoteUser(sessionParams.get("proxyuser")); |
| } else { |
| ugi = UserGroupInformation.getCurrentUser(); |
| } |
| } else { |
| ugi = UserGroupInformation.createRemoteUser(proxyuser); |
| } |
| ugi.setAuthenticationMethod(getAuthenticationMethod()); |
| return ugi; |
| } |
| |
| /** |
| * Get the Authentication method |
| * @return |
| */ |
| private UserGroupInformation.AuthenticationMethod getAuthenticationMethod() { |
| UserGroupInformation.AuthenticationMethod authMethod; |
| if (sessionParams.containsKey("auth") && !StringUtils.isEmpty(sessionParams.get("auth"))) { |
| String authName = sessionParams.get("auth"); |
| authMethod = UserGroupInformation.AuthenticationMethod.valueOf(authName.toUpperCase()); |
| } else { |
| authMethod = UserGroupInformation.AuthenticationMethod.SIMPLE; |
| } |
| return authMethod; |
| } |
| } |