/*

* Copyright (c) 2004 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:    Provides an abstract class for ecryption operations

*

*/

#ifndef __MSRTP_ENCRYPTION_H__

#define __MSRTP_ENCRYPTION_H__

#include <e32base.h>

class MSRTPEncryption

    {

    public:

        /**

        * This function is called by SRTP for cipher operation 

        * regardless of the algorithm, the default is AESCM-128

        * Produces key stream and performs an XOR operation for the plain text

        * @param aKey  Input key.

        * @param aIV  Integer Value (IV).

	    * Returns HBufC8* decrypted/encrypted source        

        */

        virtual HBufC8* EncryptL(const TDesC8& aKey, 

                                const TDesC8& aIV, 

                                const TDesC8& aSrc ) = 0;

        virtual ~MSRTPEncryption() { };

    };

#endif // __MSRTP_ENCRYPTION_H__