Keccak256.java

/*
 * Copyright (c) [2016] [ <ether.camp> ]
 * This file is part of the ethereumJ library.
 *
 * The ethereumJ library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The ethereumJ library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
 */
// $Id: Keccak256.java 189 2010-05-14 21:21:46Z tp $

package org.ethereum.crypto.cryptohash;

/**
 * <p>This class implements the Keccak-256 digest algorithm under the
 * {@link org.ethereum.crypto.cryptohash.Digest} API.</p>
 *
 * <pre>
 * ==========================(LICENSE BEGIN)============================
 *
 * Copyright (c) 2007-2010  Projet RNRT SAPHIR
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * ===========================(LICENSE END)=============================
 * </pre>
 *
 * @version   $Revision: 189 $
 * @author    Thomas Pornin <thomas.pornin@cryptolog.com>
 */

public class Keccak256 extends KeccakCore {

	/**
	 * Create the engine.
	 */
	public Keccak256()
	{
		super("eth-keccak-256");
	}

	/** @see org.ethereum.crypto.cryptohash.Digest */
	public Digest copy()
	{
		return copyState(new Keccak256());
	}

	/** @see org.ethereum.crypto.cryptohash.Digest */
	public int engineGetDigestLength()
	{
		return 32;
	}

	@Override
	protected byte[] engineDigest() {
		return null;
	}

	@Override
	protected void engineUpdate(byte arg0) {
	}

	@Override
	protected void engineUpdate(byte[] arg0, int arg1, int arg2) {
	}
}