jp.co.yahoo.yosegi.encryptor.AesGcmEncryptorFactory Maven / Gradle / Ivy

Go to download
/**
 * 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 jp.co.yahoo.yosegi.encryptor;

public class AesGcmEncryptorFactory implements IEncryptorFactory {

  @Override
  public int getEncryptSize(
      final int textSize ,
      final Module module ,
      final AdditionalAuthenticationData aad ) {
    return textSize + AesGcmEncryptor.GCM_NONCE_LENGTH + AesGcmEncryptor.GCM_TAG_LENGTH;
  }

  @Override
  public IEncryptor createEncryptor(
      final EncryptionKey key ,
      final Module module ,
      final AdditionalAuthenticationData aad ) {
    byte[] aadBytes = aad.create( module );
    return new AesGcmEncryptor( key , aadBytes );
  }

}