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 class for AES CM 128 bit encryption/decryption.

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 #ifndef __SRTP_CIPHER_AESCM128_H__

    22 #define __SRTP_CIPHER_AESCM128_H__

    23 

    24 #include "msrtpcipher.h"

    25 

    26 //FORWARD declarations

    27 class CSrtpAESCTRCrypto;

    28 

    29 class CSRTPCipherAESCM128: public CBase, public MSRTPCipher

    30     {

    31     public:

    32         /**

    33         * Constructor.

    34         * @leave KErrNone if success, system-wide error code otherwise

    35         */

    36 	    static CSRTPCipherAESCM128* NewL();

    37 

    38         /**

    39         * Constructor.

    40         * @leave KErrNone if success, system-wide error code otherwise

    41         */

    42 	    static CSRTPCipherAESCM128* NewLC();

    43     

    44         /**

    45         * Destructor.

    46         */

    47 	    ~CSRTPCipherAESCM128();

    48 

    49         /**

    50         * Inherited from MSRTPCipher.

    51         * This function is called by SRTP for encryption/decryption with AESCM-128 

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

    53         * @param aKey  Input key.

    54         * @param aIV  Integer Value (IV).

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

    56 	    * Returns HBufC8* decrypted/encrypted source        

    57         */

    58         HBufC8* TransformL(const TDesC8& aKey, 

    59                                 const TDesC8& aIV, 

    60                                 const TDesC8& aSrc );

    61                                 

    62     private:         // Data        

    63 	    CSrtpAESCTRCrypto* iCipher;	    

    64                  

    65     private:         // methods

    66         /**

    67         * Default constructor.

    68         */

    69         CSRTPCipherAESCM128();  

    70                 

    71         void ConstructL();  

    72     };

    73 

    74 #endif // __SRTP_CIPHER_AESCM128_H__