package com.ibm.atp.auth;/* * @(#)Challenge.java *  * IBM Confidential-Restricted *  * OCO Source Materials *  * 03L7246 (c) Copyright IBM Corp. 1996, 1998 *  * The source code for this program is not published or otherwise * divested of its trade secrets, irrespective of what has been * deposited with the U.S. Copyright Office. */import com.ibm.awb.misc.Hexadecimal;/** * The <tt>Challenge</tt> class is random byte sequence which is a challenge * for authentication. *  * @version     1.00    $Date: 2001/07/28 06:33:42 $ * @author      ONO Kouichi */final public class Challenge extends ByteSequence {	/**	 * serial version UID	 */	static final long serialVersionUID = 286760688223181885L;	/**	 * The length of byte sequence.	 */	final public static int LENGTH = 32;	/**	 * Constructor creates a secure random generator,	 * and generate byte sequence as a challenge for authentication.	 */	public Challenge() {		super(LENGTH);	}	/**	 * Constructor creates	 * byte sequence as a copy of given byte sequence	 * as a challenge for authentication.	 * @param challenge a byte sequence to be copied as a challenge	 */	public Challenge(Challenge challenge) {		super(challenge.challenge());	}	/**	 * Constructor creates	 * byte sequence as a copy of given hexadecimal string of encoded bytes	 * as a challenge for authentication.	 * @param str a string of encoded byte sequence to be copied as a challenge	 */	public Challenge(String str) {		super(0, str, null);	}	/**	 * Returns current byte sequence as a challenge for authentication.	 * @return current byte sequence as a challenge for authentication.	 */	final public byte[] challenge() {		return sequence();	}	/**	 * Returns a hexadecimal string representation of the byte sequence.	 * The series of hexadecimal strings are the contents of byte sequence.	 * @return a hexadecimal string representation of the byte sequence	 * @see com.ibm.atp.auth.ByteSequence#toString	 * @override com.ibm.atp.auth.ByteSequence#toString	 */	public String toString() {		return Hexadecimal.valueOf(challenge());	}}