| /** |
| * 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 org.apache.hadoop.crypto; |
| |
| import java.security.GeneralSecurityException; |
| import javax.crypto.Cipher; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Implement the AES-CTR crypto codec using JCE provider. |
| */ |
| @InterfaceAudience.Private |
| public class JceAesCtrCryptoCodec extends JceCtrCryptoCodec { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(JceAesCtrCryptoCodec.class.getName()); |
| |
| public JceAesCtrCryptoCodec() { |
| } |
| |
| @Override |
| public Logger getLogger() { |
| return LOG; |
| } |
| |
| @Override |
| public CipherSuite getCipherSuite() { |
| return CipherSuite.AES_CTR_NOPADDING; |
| } |
| |
| @Override |
| public void calculateIV(byte[] initIV, long counter, byte[] iv) { |
| super.calculateIV(initIV, counter, iv, |
| getCipherSuite().getAlgorithmBlockSize()); |
| } |
| |
| @Override |
| public Encryptor createEncryptor() throws GeneralSecurityException { |
| return new JceCtrCipher(Cipher.ENCRYPT_MODE, getProvider(), |
| getCipherSuite(), "AES"); |
| } |
| |
| @Override |
| public Decryptor createDecryptor() throws GeneralSecurityException { |
| return new JceCtrCipher(Cipher.DECRYPT_MODE, getProvider(), |
| getCipherSuite(), "AES"); |
| } |
| } |