/*

* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

* Software random implementation

*

*/

/**

 @file

 @internalComponent

 @released

*/

#ifndef __CRYPTOAPI_RANDOMIMPL_H__

#define __CRYPTOAPI_RANDOMIMPL_H__

#include <cryptospi/cryptoplugin.h>

#include <cryptospi/randomplugin.h>

namespace SoftwareCrypto

	{

	using namespace CryptoSpi;

	NONSHARABLE_CLASS(CRandomImpl): public CBase, public MRandom

		{

	public:

		// NewL & NewLC

		static CRandomImpl* NewL(TUid aImplementationUid);

		static CRandomImpl* NewLC(TUid aImplementationUid);

		// From MPlugin

		void Reset();

		void Close();

		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);

		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

		TAny* GetExtension(TUid aExtensionId);

		TUid ImplementationUid() const;

		// From MRandom

		void GenerateRandomBytesL(TDes8& aDest);

		static CExtendedCharacteristics* CreateExtendedCharacteristicsL();

	private:

		//Constructor

		CRandomImpl(TUid aImplementationUid);

		//Destructor

		~CRandomImpl();

	private:

		TUid iImplementationUid;

		};

	class TRandomImpl {

	/**

	 * The user interface to the system cryptographically 

	 * secure random number generator.

	 */

	public:

		/**

		 * Fills the provided buffer with secure random data up to its

		 * current length, discarding any current content.

		 *

		 * @param aDestination The buffer in which to write the random data.

		 */

		static void Random(TDes8& aDestination);

		};

	class RRandomSessionImpl : public RSessionBase

	/**

	 * The client interface to the system random number generator. End

	 * users should use TRandom instead of this interface.

	 *

	 */

		{

	public:

		RRandomSessionImpl();

		/**

		 * Fills the provided buffer with secure random data up to its

		 * current length, discarding any current content.

		 *

		 * @param aDestination The buffer in to which to write the random data 

		 */

		TInt GetRandom(TDes8& aDestination);

		/**

		 * Opens a new session with the random number server.

		 */

		void ConnectL();

		};

	}

#endif // __CRYPTOAPI_RANDOMIMPL_H__