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msnchallengehandler.h

/*
    msnchallengehandler.h - Computes a msn challenge response hash key.

    Copyright (c) 2005 by Gregg Edghill       <gregg.edghill@gmail.com>
    Kopete    (c) 2003-2005 by The Kopete developers <kopete-devel@kde.org>

    Portions taken from
      http://msnpiki.msnfanatic.com/index.php/MSNP11:Challenges

    *************************************************************************
    *                                                                       *
    * This program is free software; you can redistribute it and/or modify  *
    * it under the terms of the GNU General Public License as published by  *
    * the Free Software Foundation; either version 2 of the License, or     *
    * (at your option) any later version.                                   *
    *                                                                       *
    *************************************************************************
*/

#ifndef MSNCHALLENGEHANDLER_H
#define MSNCHALLENGEHANDLER_H

#include <qvaluevector.h>

/**
 * Provides a simple way to compute a msn challenge response hash key.
 *
 * @author Gregg Edghill
 */
00030 class MSNChallengeHandler
{
public:
      MSNChallengeHandler(const QString& productKey, const QString& productId);
    ~MSNChallengeHandler();

      /**
       * Computes the response hash string for the specified challenge string.
       */
    QString computeHash(const QString& challengeString);

      /**
       * Returns the product id used by the challenge handler.
       */
    QString productId();
    
private:

      /**
       * Creates a 64-bit hash key.
       */
       Q_INT64 createHashKey(const QValueVector<Q_INT32>& md5Integers, const QValueVector<Q_INT32>& challengeIntegers);
       
      /**
       * Swaps the bytes in a hex string.
       */
      QString hexSwap(const QString& in);
      
      QString m_productKey;
      QString m_productId;
};

#endif

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