1 /*

     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:    Provides an abstract class for SRTP

    15 *                  cipher operation (encryption/decryption)

    16 *

    17 */

    18 

    19 

    20 

    21 

    22 #ifndef __MSRTP_CIPHER_H__

    23 #define __MSRTP_CIPHER_H__

    24 

    25 #include <e32base.h>

    26 

    27 class MSRTPCipher

    28     {

    29     public:

    30         /**

    31         * This function is called by SRTP for 

    32         * encryption/decryption cipher operation 

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

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

    35         * @param aKey  Input key.

    36         * @param aIV  Integer Value (IV).

    37         * @param aSrc source data which will be transformed.

    38 	    * Returns HBufC8* decrypted/encrypted source        

    39         */

    40         virtual HBufC8* TransformL(const TDesC8& aKey, 

    41                                 const TDesC8& aIV, 

    42                                 const TDesC8& aSrc ) = 0;

    43                                 

    44         virtual ~MSRTPCipher() { };

    45     };

    46 

    47 #endif // __MSRTP_CIPHER_H__