/*

 * Copyright (c) 2006-2010 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: 

 *

 */

 #ifndef __RSAIMPL_H__

 #define __RSAIMPL_H__

 /**

 @file 

 @internalComponent

 @released

 */

 #include <e32base.h>

 #include <e32cmn.h>

 #include <cryptospi/keys.h>

 #include "asymmetriccipherimpl.h"

 /**

  * Implementation of RSA encryption as described in PKCS#1 v1.5.

  */

 namespace SoftwareCrypto

 	{

 	using namespace CryptoSpi;

 	NONSHARABLE_CLASS(CRSAImpl) : public CAsymmetricCipherImpl

 		{

 	public:

 		/**

 		Creates an instance of an RSA asymmetric cipher plug-in.

 		@param aKey The key

 		@param aCryptoMode Whether to encrypt or decrypt

 		@param aPadding The padding scheme to use None, SSLv3, PKCS#7

 		@return A pointer to a CRSAImpl instance

 		*/

 		static CRSAImpl* NewL(TUid aImplementationUid, const CKey& aKey,

 			TUid aCryptoMode, TUid aPadding);

 		/**

 		Creates an instance of an RSA asymmetric cipher plug-in.

 		A pointer to the plug-in instance is placed on the cleanup stack.

 		@param aKey The key

 		@param aCryptoMode Whether to encrypt or decrypt

 		@param aPadding The padding scheme to use None, SSLv3, PKCS#7

 		@return A pointer to a CRSAImpl instance

 		*/

 		static CRSAImpl* NewLC(TUid aImplementationUid, const CKey& aKey,

 			TUid aCryptoMode, TUid aPadding);

 		// Override CAsymmetricCipherImpl virtual functions

 		TUid ImplementationUid() const;

 		TBool IsValidKeyLengthL(TInt aKeyBytes) const;

 		TInt GetMaximumInputLengthL() const;

 		TInt GetMaximumOutputLengthL() const;

 		void ProcessL(const TDesC8& aInput, TDes8& aOutput);

 		// End of CAsymmetricCipherImpl

 		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

 		static CExtendedCharacteristics* CreateExtendedCharacteristicsL();

 		// Destructor

 		~CRSAImpl();

 	private:

 		/**

 		Constructor

 		@param aCryptoMode Whether to encrypt or decrypt

 		@param aPaddingMode The padding mode to use. None, SSL, PKCS#7

 		*/

 		CRSAImpl(TUid aImplementationUid, TUid aCryptoMode, TUid aPaddingMode);

 		/// second phase of construction

 		void ConstructL(const CKey& aKey);

 		/// for internal usage, called from ProcessL

 		void EncryptL(const TDesC8& aInput, TDes8& aOutput) const;

 		void DecryptL(const TDesC8& aInput, TDes8& aOutput) const;

 	private:

 		TUid iImplementationUid; 

 		};

 	}

 #endif // __RSAIMPL_H__