/*
* Copyright (c) 2003, 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 com.sun.crypto.provider;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.RC2ParameterSpec;
/**
* JCE CipherSpi for the RC2(tm) algorithm as described in RFC 2268.
* The real code is in CipherCore and RC2Crypt.
*
* @since 1.5
* @author Andreas Sterbenz
*/
public final class RC2Cipher extends CipherSpi {
// internal CipherCore & RC2Crypt objects which do the real work.
private final CipherCore core;
private final RC2Crypt embeddedCipher;
public RC2Cipher() {
SunJCE.ensureIntegrity(getClass());
embeddedCipher = new RC2Crypt();
core = new CipherCore(embeddedCipher, 8);
}
protected void engineSetMode(String mode)
throws NoSuchAlgorithmException {
core.setMode(mode);
}
protected void engineSetPadding(String paddingScheme)
throws NoSuchPaddingException {
core.setPadding(paddingScheme);
}
protected int engineGetBlockSize() {
return 8;
}
protected int engineGetOutputSize(int inputLen) {
return core.getOutputSize(inputLen);
}
protected byte[] engineGetIV() {
return core.getIV();
}
protected AlgorithmParameters engineGetParameters() {
return core.getParameters("RC2");
}
protected void engineInit(int opmode, Key key, SecureRandom random)
throws InvalidKeyException {
embeddedCipher.initEffectiveKeyBits(0);
core.init(opmode, key, random);
}
protected void engineInit(int opmode, Key key,
AlgorithmParameterSpec params, SecureRandom random)
throws InvalidKeyException, InvalidAlgorithmParameterException {
if (params != null && params instanceof RC2ParameterSpec) {
embeddedCipher.initEffectiveKeyBits
(((RC2ParameterSpec)params).getEffectiveKeyBits());
} else {
embeddedCipher.initEffectiveKeyBits(0);
}
core.init(opmode, key, params, random);
}
protected void engineInit(int opmode, Key key,
AlgorithmParameters params, SecureRandom random)
throws InvalidKeyException, InvalidAlgorithmParameterException {
if (params != null && params.getAlgorithm().equals("RC2")) {
try {
RC2ParameterSpec rc2Params = (RC2ParameterSpec)
params.getParameterSpec(RC2ParameterSpec.class);
engineInit(opmode, key, rc2Params, random);
} catch (InvalidParameterSpecException ipse) {
throw new InvalidAlgorithmParameterException
("Wrong parameter type: RC2 expected");
}
} else {
embeddedCipher.initEffectiveKeyBits(0);
core.init(opmode, key, params, random);
}
}
protected byte[] engineUpdate(byte[] in, int inOfs, int inLen) {
return core.update(in, inOfs, inLen);
}
protected int engineUpdate(byte[] in, int inOfs, int inLen,
byte[] out, int outOfs) throws ShortBufferException {
return core.update(in, inOfs, inLen, out, outOfs);
}
protected byte[] engineDoFinal(byte[] in, int inOfs, int inLen)
throws IllegalBlockSizeException, BadPaddingException {
return core.doFinal(in, inOfs, inLen);
}
protected int engineDoFinal(byte[] in, int inOfs, int inLen,
byte[] out, int outOfs) throws IllegalBlockSizeException,
ShortBufferException, BadPaddingException {
return core.doFinal(in, inOfs, inLen, out, outOfs);
}
protected int engineGetKeySize(Key key) throws InvalidKeyException {
byte[] keyBytes = CipherCore.getKeyBytes(key);
RC2Crypt.checkKey(key.getAlgorithm(), keyBytes.length);
return keyBytes.length << 3;
}
protected byte[] engineWrap(Key key)
throws IllegalBlockSizeException, InvalidKeyException {
return core.wrap(key);
}
protected Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm,
int wrappedKeyType) throws InvalidKeyException,
NoSuchAlgorithmException {
return core.unwrap(wrappedKey, wrappedKeyAlgorithm, wrappedKeyType);
}
}