/*

* Copyright (c) 2002-2005 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: Header declaration

*

*/

#ifndef CCGUIDGEN_H

#define CCGUIDGEN_H

// INCLUDES

#include <e32base.h>

#include <e32std.h>

// CONSTANTS

_LIT8(KSenUuidPrefix, "uuid:"); // GUID is valid URN

const TInt KSenUuidMaxHostIdLength = 64;

const TInt KSenUuidMaxInt64Length = 20;

const TInt KSenUuidNumOfSlashes = 4;

const TInt KSenUuidHexWidth = 2;

const TInt KSenUuidPrefixLength = 5; // KSenUuidPrefix().Length(); 

const TInt KSenUuidHashMultiplier = 2;

const TInt KSenUuidHashReserved = 2;

const TInt KSenUuidMaxHashLength = KSenUuidMaxHostIdLength + KSenUuidMaxInt64Length * KSenUuidHashMultiplier + KSenUuidHashReserved;

const TInt KSenUuidMaxLength = KSenUuidPrefixLength + KSenUuidMaxHashLength * KSenUuidHexWidth + KSenUuidNumOfSlashes; 

// FORWARD DECLARATIONS

class CMD5;

// CLASS DECLARATION

class CSenGuidGen : public CBase

    {

    public: // Constructors and destructor

        IMPORT_C static CSenGuidGen* NewL();

        IMPORT_C static CSenGuidGen* NewLC();

        ~CSenGuidGen();

        // New functions

        /**

        *  Generate totally random (but not cryptographically strong)

        *  GUIDs. The GUID is based on the MD5 hash of a random number

        *  and the current time. Some kind of host ID should be also

        *  used but the author did not find an easy way of getting it.

        */

        IMPORT_C HBufC* GetRandomGuidLC();

        IMPORT_C HBufC8* GetRandomGuid8LC();

        IMPORT_C HBufC16* GetRandomGuid16LC();

    private:

    /**

    * C++ default constructor.

        */

        CSenGuidGen();

        /**

        * By default Symbian 2nd phase constructor is private.

        */  

        void ConstructL();

        // New functions

        TPtrC8 GetRandomHash();

    private: // Data

        TInt64 iSeed;

        HBufC8 *ipHostId;

        CMD5 *ipMd5HashGen;

    };

#endif // CCGUIDGEN_H

// End of File