1 /*

     2 * Copyright (c) 2002-2009 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 the License "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: 

    15 * ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the 

    16 * Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.

    17 *

    18 */

    19 

    20 

    21 /**

    22  @file

    23  @publishedPartner

    24  @released

    25 */

    26 

    27 #ifndef __STREAMCIPHER_H__

    28 #define __STREAMCIPHER_H__

    29 

    30 #include <msymmetriccipher.h>

    31 

    32 /**

    33 *	Abstract interface class to be implemented by Stream Ciphers.

    34 */

    35 class CStreamCipher : public CSymmetricCipher

    36 {

    37 public:	//	From CSymmetricCipher

    38 	/**	

    39 	*	Implemented by calling the DoProcess() pure virtual function, 

    40 	*	to be implemented by subclasses.

    41 	*

    42 	*	@param aInput	Input text.

    43 	*	@param aOutput	Text after processing.

    44 	*/

    45 	IMPORT_C virtual void ProcessFinalL(const TDesC8& aInput, TDes8& aOutput);

    46 

    47 	/**	

    48 	*	Implemented by calling the DoProcess() pure virtual function, 

    49 	*	to be implemented by subclasses.

    50 	*

    51 	*	@param aInput	Input text.

    52 	*	@param aOutput	Text after processing.

    53 	*/

    54 	IMPORT_C virtual void Process(const TDesC8& aInput, TDes8& aOutput);	

    55 

    56 	/**

    57 	*	Gets the block size in bytes (always = 1 for stream ciphers).

    58 	*

    59 	*	@return	Cipher block size (in bytes).

    60 	*/

    61 	IMPORT_C virtual TInt BlockSize(void) const;

    62 	IMPORT_C virtual TInt MaxOutputLength(TInt aInputLength) const;

    63 	IMPORT_C virtual TInt MaxFinalOutputLength(TInt aInputLength) const;

    64 protected:

    65 	/**	

    66 	*	DoProcess() pure virtual function, 

    67 	*	to be implemented by subclasses.

    68 	*

    69 	*	@param aData	On input, text to be processed; on return, processed text.

    70 	*/

    71 	IMPORT_C virtual void DoProcess(TDes8& aData) = 0;

    72 };

    73 

    74 #endif	//	__STREAMCIPHER_H__