content: /*
   * 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.server.security.encryption;
  
  import java.util.Map;
  import java.util.SortedMap;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.AmbariRuntimeException;
  import org.apache.ambari.server.agent.AgentEncryptionKey;
  import org.apache.ambari.server.agent.stomp.dto.ClusterConfigs;
  import org.apache.ambari.server.events.AgentConfigsUpdateEvent;
  import org.apache.ambari.server.state.Cluster;
  import org.apache.ambari.server.state.Clusters;
  
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  
  /**
   * This encryptor encrypts the sensitive data in config updates sent to ambari-agent.
   * Decryption happens on the agent side.
   */
  @Singleton
  public class AgentConfigUpdateEncryptor extends PropertiesEncryptor implements Encryptor<AgentConfigsUpdateEvent> {
    private final AgentEncryptionKey encryptionKey;
    private final Provider<Clusters> clusters;
  
    @Inject
    public AgentConfigUpdateEncryptor(EncryptionService encryptionService, CredentialStoreService credentialStore, Provider<Clusters> clusters) {
      super(encryptionService);
      this.encryptionKey = AgentEncryptionKey.loadFrom(credentialStore, true);
      this.clusters = clusters;
    }
  
    @Override
    public void encryptSensitiveData(AgentConfigsUpdateEvent event) {
      for (Map.Entry<String, ClusterConfigs> each : event.getClustersConfigs().entrySet()) {
        Cluster cluster = getCluster(Long.parseLong(each.getKey()));
        ClusterConfigs clusterConfigs = each.getValue();
        for (Map.Entry<String, SortedMap<String, String>> clusterConfig : clusterConfigs.getConfigurations().entrySet()) {
          encrypt(
            clusterConfig.getValue(),
            cluster,
            clusterConfig.getKey(),
            encryptionKey.toString());
        }
      }
    }
  
    @Override
    public void decryptSensitiveData(AgentConfigsUpdateEvent event) {
      throw new UnsupportedOperationException("Not supported"); // Decryption happens on the agent side, this is not needed right now
    }
  
    private Cluster getCluster(long clusterId) throws AmbariRuntimeException {
      try {
        return clusters.get().getCluster(clusterId);
      } catch (AmbariException e) {
        throw new AmbariRuntimeException("Cannot load cluster: " + clusterId, e);
      }
    }
  
    @Override
    public String getEncryptionKey() {
      return encryptionKey.toString();
    }
  }
  