rc4key.java

来自「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」· Java 代码 · 共 118 行

package au.net.aba.crypto.provider;

/*
 * $Id: RC4Key.java,v 1.11 1998/10/27 05:11:01 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/RC4Key.java,v $
 * $Revision: 1.11 $
 * $Date: 1998/10/27 05:11:01 $
 * $State: Exp $
 */

import java.io.*;
import javax.crypto.SecretKey;

/**
 * A class wrapper for RC4 keys.
 */
public class RC4Key implements SecretKey, Externalizable
{
	public final static String ident = "$Id: RC4Key.java,v 1.11 1998/10/27 05:11:01 leachbj Exp $";

	static final long serialVersionUID = 1L;

	//==================================
	// Constructors
	//==================================

	private byte[]		key;

	/**
	 * Construct an empty RC4Key.
	 */
	public RC4Key()
	{
	}
	/**
	 * Construct an RC4Key from a set of bytes.
	 *
	 * @param b		The data bytes.
	 */
	public RC4Key(
		byte[] b)
	{
		key = new byte[b.length];
		System.arraycopy(b, 0, key, 0, b.length);
	}
	/**
	 * return algorithm this key is for.
	 *
	 * @param the string "RC4".
	 */
	public String getAlgorithm()
	{
		return "RC4";
	}
	/**
	 * return an encoded representation of the 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;
	}
	/**
	 * return the format this key is in.
	 *
	 * @param 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);
	}
}