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
  //
  //   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 com.cloud.hypervisor.kvm.resource.wrapper;
  
  import java.io.File;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  
  
  import com.cloud.utils.StringUtils;
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.ModifySshKeysCommand;
  import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import com.cloud.utils.script.Script;
  
  @ResourceWrapper(handles =  ModifySshKeysCommand.class)
  public final class LibvirtModifySshKeysCommandWrapper extends CommandWrapper<ModifySshKeysCommand, Answer, LibvirtComputingResource> {
  
  
      @Override
      public Answer execute(final ModifySshKeysCommand command, final LibvirtComputingResource libvirtComputingResource) {
  
          final LibvirtUtilitiesHelper libvirtUtilitiesHelper = libvirtComputingResource.getLibvirtUtilitiesHelper();
  
          final String sshkeyspath = libvirtUtilitiesHelper.retrieveSshKeysPath();
          final String sshpubkeypath = libvirtUtilitiesHelper.retrieveSshPubKeyPath();
          final String sshprvkeypath = libvirtUtilitiesHelper.retrieveSshPrvKeyPath();
  
          final File sshKeysDir = new File(sshkeyspath);
          String result = null;
          if (!sshKeysDir.exists()) {
              // Change permissions for the 700
              final Script script = new Script("mkdir", libvirtComputingResource.getTimeout(), logger);
              script.add("-m", "700");
              script.add(sshkeyspath);
              script.execute();
  
              if (!sshKeysDir.exists()) {
                  logger.debug("failed to create directory " + sshkeyspath);
              }
          }
  
          final File pubKeyFile = new File(sshpubkeypath);
          if (!pubKeyFile.exists()) {
              try {
                  pubKeyFile.createNewFile();
              } catch (final IOException e) {
                  result = "Failed to create file: " + e.toString();
                  logger.debug(result);
              }
          }
  
          if (pubKeyFile.exists()) {
              try (FileOutputStream pubkStream = new FileOutputStream(pubKeyFile)) {
                  pubkStream.write(command.getPubKey().getBytes(StringUtils.getPreferredCharset()));
              } catch (final FileNotFoundException e) {
                  result = "File" + sshpubkeypath + "is not found:"
                          + e.toString();
                  logger.debug(result);
              } catch (final IOException e) {
                  result = "Write file " + sshpubkeypath + ":" + e.toString();
                  logger.debug(result);
              }
          }
  
          final File prvKeyFile = new File(sshprvkeypath);
          if (!prvKeyFile.exists()) {
              try {
                  prvKeyFile.createNewFile();
              } catch (final IOException e) {
                  result = "Failed to create file: " + e.toString();
                  logger.debug(result);
              }
          }
  
          if (prvKeyFile.exists()) {
              final String prvKey = command.getPrvKey();
              try (FileOutputStream prvKStream = new FileOutputStream(prvKeyFile);){
                  if ( prvKStream != null) {
                      prvKStream.write(prvKey.getBytes(StringUtils.getPreferredCharset()));
                  }
              } catch (final FileNotFoundException e) {
                  result = "File" + sshprvkeypath + "is not found:" + e.toString();
                  logger.debug(result);
              } catch (final IOException e) {
                  result = "Write file " + sshprvkeypath + ":" + e.toString();
                  logger.debug(result);
              }
              final Script script = new Script("chmod", libvirtComputingResource.getTimeout(), logger);
              script.add("600", sshprvkeypath);
              script.execute();
          }
  
          if (result != null) {
              return new Answer(command, false, result);
          } else {
              return new Answer(command, true, null);
          }
      }
  }
  