deskey.java

面向应用的智能安全代理平台和工具包是一个综合网络应用的安全共性需求而设计和实现的一个通用性的网络信息安全应用支撑平台

package au.net.aba.crypto.provider;

/*
 * $Id: DESKey.java,v 1.11 1998/10/27 05:10:55 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/DESKey.java,v $
 * $Revision: 1.11 $
 * $Date: 1998/10/27 05:10:55 $
 * $State: Exp $
 */

import java.io.*;

import javax.crypto.SecretKey;
import javax.crypto.spec.DESKeySpec;

/**
 * a class that provides a basic DES key.
 */
public class DESKey implements SecretKey, Externalizable
{
	public final static String ident = "$Id: DESKey.java,v 1.11 1998/10/27 05:10:55 leachbj Exp $";

	static final long serialVersionUID = 1L;

	private byte[]		key;

	/**
	 * constructor for serialisation
	 */
	public DESKey()
	{
	}
	/**
	 * standard constructor.
	 *
	 * @param rawKey the byte array containing the raw key data.
	 */
	public DESKey(
		byte[]	rawKey)
	{
		key = new byte[DESKeySpec.DES_KEY_LEN];
		System.arraycopy(rawKey, 0, key, 0, DESKeySpec.DES_KEY_LEN);
	}
	/**
	 * returns the algorithm for this key.
	 *
	 * @return the string "DES"
	 */
	public String getAlgorithm()
	{
		return "DES";
	}
	/**
	 * returns an encoded representation of this key.
	 *
	 * @return the key as raw byte data.
	 */
	public byte[] getEncoded()
	{
		byte[]	tmp;

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

		return tmp;
	}
	/**
	 * returns the format for this key.
	 *
	 * @return the string "RAW"
	 */
	public String getFormat()
	{
		return "RAW";
	}
	/**
	 * serialisation support using Externalizable.
	 *
	 * @param in the object input stream.
	 */
	public void readExternal(
		ObjectInput	in)
		throws IOException
	{
		int	len;

		len = in.read();
		key = new byte[len];
		in.readFully(key, 0, len);
	}
	/**
	 * serialisation support using Externalizable.
	 *
	 * @param out the object output stream.
	 */
	public void writeExternal(
		ObjectOutput	out)
		throws IOException
	{
		out.write((byte)key.length);
		out.write(key);
	}
}