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	/*
	* Copyright (c) 2003, 2011, 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() {
	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 =
	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);
	}

	}

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