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/*
* 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 Boris V. Kuznetsov
* @version $Revision$
*/
package org.apache.harmony.crypto.internal;
import java.nio.ByteBuffer;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.BadPaddingException;
import javax.crypto.CipherSpi;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.ShortBufferException;
/**
* CipherSpi implementation for javax.crypto.NullCipher
*
*/
public class NullCipherSpi extends CipherSpi {
@Override
public void engineSetMode(String arg0) throws NoSuchAlgorithmException {
// Do nothing
}
@Override
public void engineSetPadding(String arg0) throws NoSuchPaddingException {
// Do nothing
}
@Override
public int engineGetBlockSize() {
return 1;
}
@Override
public int engineGetOutputSize(int inputLen) {
return inputLen;
}
@Override
public byte[] engineGetIV() {
return new byte[8]; // compatible with RI
}
@Override
public AlgorithmParameters engineGetParameters() {
return null;
}
@Override
public void engineInit(int opmode, Key key, SecureRandom random)
throws InvalidKeyException {
// Do nothing
}
@Override
public void engineInit(int opmode, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws InvalidKeyException,
InvalidAlgorithmParameterException {
// Do nothing
}
@Override
public void engineInit(int opmode, Key key, AlgorithmParameters params,
SecureRandom random) throws InvalidKeyException,
InvalidAlgorithmParameterException {
// Do nothing
}
@Override
public byte[] engineUpdate(byte[] input, int inputOffset, int inputLen) {
if (input == null) {
return null;
}
byte[] result = new byte[inputLen];
System.arraycopy(input, inputOffset, result, 0, inputLen);
return result;
}
@Override
public int engineUpdate(byte[] input, int inputOffset, int inputLen,
byte[] output, int outputOffset) throws ShortBufferException {
if (input == null) {
return 0;
}
System.arraycopy(input, inputOffset, output, outputOffset, inputLen);
return inputLen;
}
@Override
public int engineUpdate(ByteBuffer input, ByteBuffer output)
throws ShortBufferException {
if (input == null || output == null) {
throw new NullPointerException();
}
int result = input.limit() - input.position();
try {
output.put(input);
} catch (java.nio.BufferOverflowException e) {
throw new ShortBufferException("output buffer too small");
}
return result;
}
@Override
public byte[] engineDoFinal(byte[] input, int inputOffset, int inputLen)
throws IllegalBlockSizeException, BadPaddingException {
if (input == null) {
return null;
}
return engineUpdate(input, inputOffset, inputLen);
}
@Override
public int engineDoFinal(byte[] input, int inputOffset, int inputLen,
byte[] output, int outputOffset) throws ShortBufferException,
IllegalBlockSizeException, BadPaddingException {
int result = engineUpdate(input, inputOffset, inputLen, output,
outputOffset);
return result;
}
@Override
public int engineDoFinal(ByteBuffer input, ByteBuffer output)
throws ShortBufferException, IllegalBlockSizeException,
BadPaddingException {
return engineUpdate(input, output);
}
@Override
public byte[] engineWrap(Key key) throws IllegalBlockSizeException, InvalidKeyException {
throw new UnsupportedOperationException();
}
@Override
public Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm,
int wrappedKeyType) throws InvalidKeyException,
NoSuchAlgorithmException {
throw new UnsupportedOperationException();
}
@Override
public int engineGetKeySize(Key key) throws InvalidKeyException {
throw new UnsupportedOperationException();
}
}
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