/*
* 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.
*/
/**
* @author Alexander Y. Kleymenov
* @version $Revision$
*/
package javax.crypto;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.crypto.NullCipher;
/**
* @com.intel.drl.spec_ref
*/
public class CipherOutputStream extends FilterOutputStream {
private final Cipher cipher;
private final byte[] arr = new byte[1];
/**
* @com.intel.drl.spec_ref
*/
public CipherOutputStream(OutputStream os, Cipher c) {
super(os);
cipher = c;
}
/**
* @com.intel.drl.spec_ref
*/
protected CipherOutputStream(OutputStream os) {
this(os, new NullCipher());
}
/**
* @com.intel.drl.spec_ref
*/
@Override
public void write(int b) throws IOException {
byte[] result;
arr[0] = (byte) b;
result = cipher.update(arr);
if (result != null) {
out.write(result);
}
}
/**
* @com.intel.drl.spec_ref
*/
@Override
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
/**
* @com.intel.drl.spec_ref
*/
@Override
public void write(byte[] b, int off, int len) throws IOException {
if (len == 0) {
return;
}
byte[] result = cipher.update(b, off, len);
if (result != null) {
out.write(result);
}
}
/**
* @com.intel.drl.spec_ref
*/
@Override
public void flush() throws IOException {
out.flush();
}
/**
* @com.intel.drl.spec_ref
*/
@Override
public void close() throws IOException {
byte[] result;
try {
if (cipher != null) {
result = cipher.doFinal();
if (result != null) {
out.write(result);
}
}
if (out != null) {
out.flush();
}
} catch (BadPaddingException e) {
throw new IOException(e.getMessage());
} catch (IllegalBlockSizeException e) {
throw new IOException(e.getMessage());
} finally {
if (out != null) {
out.close();
}
}
}
}