1 /*

     2 * Copyright (c) 2006-2009 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 * hmac implementation

    16 *

    17 */

    18 

    19 

    20 /**

    21  @file

    22  @internalComponent

    23  @released

    24 */

    25 

    26 #ifndef __CRYPTOAPI_SOFTWAREHMACIMPL_H__

    27 #define __CRYPTOAPI_SOFTWAREHMACIMPL_H__

    28 

    29 #include "softwarehashbase.h"

    30 #include "keys.h"

    31 

    32 namespace SoftwareCrypto

    33 	{

    34 	using namespace CryptoSpi;

    35 	

    36 	/**

    37 	 * This is the maximum block size currently supported by HMAC implementation.

    38 	 */  

    39 	const TInt KMaxBlockSize = 128;		

    40 	

    41 	NONSHARABLE_CLASS(CHMacImpl) : public CBase, public MSoftwareHash

    42 		{		

    43 	public:

    44 		//NewL & NewLC

    45 		static CHMacImpl* NewL(MSoftwareHash* aHash);

    46 		static CHMacImpl* NewLC(MSoftwareHash* aHash);

    47 		static CHMacImpl* NewL(const CKey& aKey, MSoftwareHash* aHash);

    48 		static CHMacImpl* NewLC(const CKey& aKey, MSoftwareHash* aHash);

    49 

    50 		//From MPlugin

    51 		void Reset();

    52 		void Close();		

    53 		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);		

    54 		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

    55 		TAny* GetExtension(TUid aExtensionId);

    56 		

    57 		//From MHmac

    58 	    TPtrC8 Hash(const TDesC8& aMessage);

    59 	    void Update(const TDesC8& aMessage);

    60 		TPtrC8 Final(const TDesC8& aMessage);

    61 		void SetKeyL(const CKey& aKey);

    62 		void SetOperationModeL(TUid aOperationMode);

    63 		MHash* ReplicateL();		

    64 		MHash* CopyL();

    65 				

    66 	private:

    67 		//Constructors

    68 		CHMacImpl();

    69 		CHMacImpl(const CHMacImpl& aHMacImpl);

    70 		

    71 		//Destructor

    72 		~CHMacImpl();

    73 		void RestoreState();

    74 		void StoreState();

    75 		void ConstructL(const CKey& aKey, MSoftwareHash* aHash);

    76 		void ConstructL(MSoftwareHash* aHash);

    77 		void Initialise(const TDesC8& aKey);

    78 		void InitBlockSizeL();

    79 		

    80 	private:

    81 		TUid iImplementationUid;

    82 		MSoftwareHash* iDigest;

    83 		

    84 		TBuf8<KMaxBlockSize> iInnerPad;

    85 		TBuf8<KMaxBlockSize> iOuterPad;

    86 		TBuf8<KMaxBlockSize> iInnerPadCopy;

    87 		TBuf8<KMaxBlockSize> iOuterPadCopy;

    88 		

    89 		TInt iBlockSize;

    90 		};

    91 	}

    92 

    93 #endif // __CRYPTOAPI_SOFTWAREHMACIMPL_H__