sl@0: /*
sl@0: * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #ifndef __CBCMODESHIM_H__
sl@0: #define __CBCMODESHIM_H__
sl@0: 
sl@0: #include <cbcmode.h>
sl@0: 
sl@0: /**
sl@0: @file
sl@0: @internalComponent
sl@0: @released
sl@0: */
sl@0: 
sl@0: namespace CryptoSpi 
sl@0: 	{
sl@0: 	class CSymmetricCipher;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: CBC mode encryptor shim class that delegates all work to CModeCBCEncryptor.
sl@0: This should only be instantiated by CModeCBCEncryptor::NewLC
sl@0: */
sl@0: NONSHARABLE_CLASS(CModeCBCEncryptorShim) : public CModeCBCEncryptor
sl@0: {
sl@0: public:
sl@0: 	/**
sl@0: 	Creates a new CModeCBCEncryptorShim. If the block transfer 
sl@0: 	@param aBT A pointer to the block transform object.
sl@0: 	@param aIV The initialisation vector to use.
sl@0: 	@return A pointer to a CModeCBCEncryptorShim instance or NULL if the block transform
sl@0: 	does not support SPI or the SPI plug-in does not support CBC mode
sl@0: 	*/
sl@0: 	static CModeCBCEncryptorShim* NewL(CBlockTransformation* aBT, const TDesC8& aIV);
sl@0: 
sl@0: 	// From CBase
sl@0: 	TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1);
sl@0: 
sl@0: 	// From CBlockTransformation
sl@0: 	void Reset();
sl@0: 	TInt BlockSize() const;
sl@0: 	TInt KeySize() const;
sl@0: 	void Transform(TDes8& aBlock);	
sl@0: 
sl@0: 	// From CBlockChainingMode
sl@0: 	void SetIV(const TDesC8& aIv);
sl@0: 	
sl@0: private:
sl@0: 	/// Constructor
sl@0: 	CModeCBCEncryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl);
sl@0: 	
sl@0: 	// Just invokes ContructL in super-class
sl@0: 	void ConstructL(CBlockTransformation* aBT, const TDesC8& aIv);
sl@0: 	
sl@0: 	// owned by block transform - iBT
sl@0: 	CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl;		
sl@0: };
sl@0: 
sl@0: /**
sl@0: CBC mode decryptor shim class that delegates all work to CModeCBCDecryptor.
sl@0: This should only be instantiated by CModeCBCDecryptor::NewLC
sl@0: */
sl@0: NONSHARABLE_CLASS(CModeCBCDecryptorShim) : public CModeCBCDecryptor
sl@0: {
sl@0: public:
sl@0: 	/**
sl@0: 	Creates a new CModeCBCEncryptorShim.
sl@0: 	@param aBT A pointer to the block transform object.
sl@0: 	@param aIV The initialisation vector to use.
sl@0: 	@return A pointer to a CModeCBCDecryptorShim instance or NULL if the block transform
sl@0: 	does not support SPI or the SPI plug-in does not support CBC mode
sl@0: 	*/
sl@0: 	static CModeCBCDecryptorShim* NewL(CBlockTransformation* aBT, const TDesC8& aIV);
sl@0: 
sl@0: 	// From CBase
sl@0: 	TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1);
sl@0: 
sl@0: 	// From CBlockTransformation
sl@0: 	void Reset();
sl@0: 	TInt BlockSize() const;
sl@0: 	TInt KeySize() const;
sl@0: 	void Transform(TDes8& aBlock);	
sl@0: 
sl@0: 	// From CBlockChainingMode
sl@0: 	void SetIV(const TDesC8& aIv);
sl@0: 	
sl@0: private:
sl@0: 	/// Constructor
sl@0: 	CModeCBCDecryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl);
sl@0: 	
sl@0: 	// Just invokes ContructL in super-class
sl@0: 	void ConstructL(CBlockTransformation* aBT, const TDesC8& aIv);
sl@0: 		
sl@0: 	// owned by block transform - iBT
sl@0: 	CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl;
sl@0: };
sl@0: 
sl@0: #endif	//	__CBCMODESHIM_H__