/* * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javax.crypto; import java.security.*;import java.security.spec.*; /** * This class provides a delegate for the identity cipher - one that does not * tranform the plaintext. * * @author Li Gong * @see Nullcipher * * @since 1.4 */ final class NullCipherSpi extends CipherSpi { /* * Do not let anybody instantiate this directly (protected). */ protected NullCipherSpi() {} public void engineSetMode(String mode) {} public void engineSetPadding(String padding) {} protected int engineGetBlockSize() { return 1; } protected int engineGetOutputSize(int inputLen) { return inputLen; } protected byte[] engineGetIV() { byte[] x = new byte[8]; return x; } protected AlgorithmParameters engineGetParameters() { return null; } protected void engineInit(int mode, Key key, SecureRandom random) {} protected void engineInit(int mode, Key key, AlgorithmParameterSpec params, SecureRandom random) {} protected void engineInit(int mode, Key key, AlgorithmParameters params, SecureRandom random) {} protected byte[] engineUpdate(byte[] input, int inputOffset, int inputLen) { if (input == null) return null; byte[] x = new byte[inputLen]; System.arraycopy(input, inputOffset, x, 0, inputLen); return x; } protected int engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) { if (input == null) return 0; System.arraycopy(input, inputOffset, output, outputOffset, inputLen); return inputLen; } protected byte[] engineDoFinal(byte[] input, int inputOffset, int inputLen) { return engineUpdate(input, inputOffset, inputLen); } protected int engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) { return engineUpdate(input, inputOffset, inputLen, output, outputOffset); } protected int engineGetKeySize(Key key) { return 0; }}
/*
* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.crypto;
import java.security.*;
import java.security.spec.*;
/**
* This class provides a delegate for the identity cipher - one that does not
* tranform the plaintext.
*
* @author Li Gong
* @see Nullcipher
*
* @since 1.4
*/
final class NullCipherSpi extends CipherSpi {
/*
* Do not let anybody instantiate this directly (protected).
*/
protected NullCipherSpi() {}
public void engineSetMode(String mode) {}
public void engineSetPadding(String padding) {}
protected int engineGetBlockSize() {
return 1;
}
protected int engineGetOutputSize(int inputLen) {
return inputLen;
}
protected byte[] engineGetIV() {
byte[] x = new byte[8];
return x;
}
protected AlgorithmParameters engineGetParameters() {
return null;
}
protected void engineInit(int mode, Key key, SecureRandom random) {}
protected void engineInit(int mode, Key key,
AlgorithmParameterSpec params,
SecureRandom random) {}
protected void engineInit(int mode, Key key,
AlgorithmParameters params,
SecureRandom random) {}
protected byte[] engineUpdate(byte[] input, int inputOffset,
int inputLen) {
if (input == null) return null;
byte[] x = new byte[inputLen];
System.arraycopy(input, inputOffset, x, 0, inputLen);
return x;
}
protected int engineUpdate(byte[] input, int inputOffset,
int inputLen, byte[] output,
int outputOffset) {
if (input == null) return 0;
System.arraycopy(input, inputOffset, output, outputOffset, inputLen);
return inputLen;
}
protected byte[] engineDoFinal(byte[] input, int inputOffset,
int inputLen)
{
return engineUpdate(input, inputOffset, inputLen);
}
protected int engineDoFinal(byte[] input, int inputOffset,
int inputLen, byte[] output,
int outputOffset)
{
return engineUpdate(input, inputOffset, inputLen,
output, outputOffset);
}
protected int engineGetKeySize(Key key)
{
return 0;
}
}