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diff --git a/kopete/protocols/msn/msnchallengehandler.h b/kopete/protocols/msn/msnchallengehandler.h
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+++ b/kopete/protocols/msn/msnchallengehandler.h
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+/*
+    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 <tqobject.h>
+#include <tqvaluevector.h>
+
+/**
+ * Provides a simple way to compute a msn challenge response hash key.
+ *
+ * @author Gregg Edghill
+ */
+class MSNChallengeHandler : public TQObject
+{
+Q_OBJECT
+  
+public:
+	MSNChallengeHandler(const TQString& productKey, const TQString& productId);
+    ~MSNChallengeHandler();
+
+	/**
+	 * Computes the response hash string for the specified challenge string.
+	 */
+    TQString computeHash(const TQString& challengeString);
+
+	/**
+	 * Returns the product id used by the challenge handler.
+	 */
+    TQString productId();
+    
+private:
+
+	/**
+	 * Creates a 64-bit hash key.
+	 */
+	 TQ_INT64 createHashKey(const TQValueVector<TQ_INT32>& md5Integers, const TQValueVector<TQ_INT32>& challengeIntegers);
+	 
+	/**
+	 * Swaps the bytes in a hex string.
+	 */
+	TQString hexSwap(const TQString& in);
+	
+	TQString m_productKey;
+	TQString m_productId;
+};
+
+#endif