001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.hadoop.fs.crypto;
019    
020    import java.io.IOException;
021    
022    import org.apache.hadoop.crypto.CryptoCodec;
023    import org.apache.hadoop.crypto.CryptoOutputStream;
024    import org.apache.hadoop.fs.FSDataOutputStream;
025    
026    public class CryptoFSDataOutputStream extends FSDataOutputStream {
027      private final FSDataOutputStream fsOut;
028      
029      public CryptoFSDataOutputStream(FSDataOutputStream out, CryptoCodec codec,
030          int bufferSize, byte[] key, byte[] iv) throws IOException {
031        super(new CryptoOutputStream(out, codec, bufferSize, key, iv, 
032            out.getPos()), null, out.getPos()); 
033        this.fsOut = out;
034      }
035      
036      public CryptoFSDataOutputStream(FSDataOutputStream out, CryptoCodec codec,
037          byte[] key, byte[] iv) throws IOException {
038        super(new CryptoOutputStream(out, codec, key, iv, out.getPos()), 
039            null, out.getPos()); 
040        this.fsOut = out;
041      }
042      
043      @Override
044      public long getPos() throws IOException {
045        return fsOut.getPos();
046      }
047    }