package au.net.aba.crypto.provider;

/*
 * $Id: TwofishKey.java,v 1.3 1998/10/26 01:46:42 leachbj Exp $
 * $Author: leachbj $
 *
 * Copyright (C) 1996-1998 Australian Business Access Pty Ltd.
 * All rights reserved.         
 *       
 * Use, modification, copying and distribution of this software is subject the
 * terms and conditions of the ABA Public Licence. See the file
 * "PUBLIC_LICENCE" for additional information.
 *
 * If you have not received a copy of the Public Licence, you must destroy all
 * copies of this file immediately. 
 *
 * $Source: /aba/CVSROOT/jdk1.1/src/au.net.aba/crypto/provider/TwofishKey.java,v $
 * $Revision: 1.3 $
 * $Date: 1998/10/26 01:46:42 $
 * $State: Exp $
 */

import java.io.*;
import java.security.*;
import java.util.StringTokenizer;

import javax.crypto.*;

/**
 * A class wrapper for Twofish keys.
 */
public class TwofishKey implements SecretKey
{
	public final static String ident = "$Id: TwofishKey.java,v 1.3 1998/10/26 01:46:42 leachbj Exp $";

	private byte[]		key;

	/**
	 * The basic constructor
	 *
	 * Key length is variable up to 256 bits.  (32 bytes)
	 *
	 * @param rawKey	the bytes making up the key.
	 */
	public TwofishKey(
		byte[]	rawKey)
	{
		int keyLength = (rawKey.length + 7) & ~7;	// round up to multiple of 8

		key = new byte[keyLength];

		/*
		 * copy in the provided key bytes
		 */
		System.arraycopy(rawKey, 0, key, 0, rawKey.length);

		/*
		 * zero out the rest of the key
		 */
		for (int i = rawKey.length; i < key.length; i++)
		{
			key[i] = 0;
		}
	}
	/**
	 * returns the algorithm for this key.
	 *
	 * @return the string "Twofish"
	 */
	public String getAlgorithm()
	{
		return "Twofish";
	}
	/**
	 * returns an encoded representation of this key.
	 *
	 * @return the key as a byte array
	 */
	public byte[] getEncoded()
	{
		byte[]	tmp;

		tmp = new byte[key.length];
		System.arraycopy(key, 0, tmp, 0, key.length);

		return tmp;
	}
	/**
	 * returns the format for this key.
	 *
	 * @return the string "RAW"
	 */
	public String getFormat()
	{
		return "RAW";
	}
}