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: * RC2 shim classes definition
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @internalComponent
sl@0:  @released
sl@0: */
sl@0: 
sl@0: #ifndef __RC2SHIM_H__
sl@0: #define __RC2SHIM_H__
sl@0: 
sl@0: #include <rc2.h>
sl@0: 
sl@0: namespace CryptoSpi
sl@0: 	{
sl@0: 	class CCryptoParams;
sl@0: 	class CSymmetricCipher;
sl@0: 	class CKey;
sl@0: 	}
sl@0: 	
sl@0: NONSHARABLE_CLASS(CRC2EncryptorShim) : public CRC2Encryptor
sl@0: {
sl@0: public:
sl@0: 	/**
sl@0: 	Creates an CRC2EncryptorShim object which has the same interface
sl@0: 	as RC2 Encryptor but delegates all work to a Crypto SPI plug-in.
sl@0: 	
sl@0: 	@param aKey The encryption key
sl@0: 	@return A pointer to a CRC2EncryptorShim instance
sl@0: 	*/
sl@0: 	static CRC2EncryptorShim* NewL(const TDesC8& aKey, TInt aEffectiveKeyLenBits);
sl@0: 	
sl@0: 	/**
sl@0: 	Creates an CRC2EncryptorShim object which has the same interface
sl@0: 	as RC2 Encryptor but delegates all work to a Crypto SPI plug-in.
sl@0: 	
sl@0: 	A pointer to the new object is placed on the cleanup stack
sl@0: 	
sl@0: 	@param aKey The encryption key
sl@0: 	@return A pointer to a CRC2EncryptorShim instance
sl@0: 	*/
sl@0: 	static CRC2EncryptorShim* NewLC(const TDesC8& aKey, TInt aEffectiveKeyLenBits);
sl@0: 	
sl@0: 	// From CBlockTransform
sl@0: 	TInt BlockSize() const;
sl@0: 	void Transform(TDes8& aBlock);
sl@0: 	void Reset(void);
sl@0: 	TInt KeySize(void) const;
sl@0: 	
sl@0: 	/// Destructor
sl@0: 	~CRC2EncryptorShim();
sl@0: 		
sl@0: private:
sl@0: 	/// Constructor
sl@0: 	CRC2EncryptorShim();
sl@0: 	void ConstructL(const TDesC8& aKey, TInt aEffectiveKeyLenBits);	
sl@0: 	
sl@0: 	// From CBase
sl@0: 	TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1);
sl@0: 	
sl@0: private:
sl@0: 	/// SPI delegate
sl@0: 	CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl;
sl@0: 		
sl@0: 	/// SPI requires all key to passed as key-objects
sl@0: 	CryptoSpi::CKey* iKey;		
sl@0: 	
sl@0: 	/// Temporary output block, SPI does not overwrite input
sl@0: 	/// RC2 uses 64bit blocks
sl@0: 	TBuf8<16> iOutputBlock;
sl@0: 	
sl@0: 	/// The effective key length is passed as an algorithm
sl@0: 	/// parameter. This allows it to be externalised.
sl@0: 	CryptoSpi::CCryptoParams* iAlgorithmParams;	
sl@0: };
sl@0: 
sl@0: NONSHARABLE_CLASS(CRC2DecryptorShim) : public CRC2Decryptor
sl@0: {
sl@0: public:
sl@0: 	/**
sl@0: 	Creates an CRC2DecryptorShim object which has the same interface
sl@0: 	as RC2 Decryptor but delegates all work to a Crypto SPI plug-in.
sl@0: 	
sl@0: 	@param aKey The decryption key
sl@0: 	@return A pointer to a CRC2DecryptorShim instance
sl@0: 	*/
sl@0: 	static CRC2DecryptorShim* NewL(const TDesC8& aKey, TInt aEffectiveKeyLenBits);
sl@0: 	
sl@0: 	/**
sl@0: 	Creates an CRC2DecryptorShim object which has the same interface
sl@0: 	as RC2 Decryptor but delegates all work to a Crypto SPI plug-in.
sl@0: 	
sl@0: 	A pointer to the new object is placed on the cleanup stack
sl@0: 	
sl@0: 	@param aKey The decryption key
sl@0: 	@return A pointer to a CRC2DecryptorShim instance
sl@0: 	*/
sl@0: 	static CRC2DecryptorShim* NewLC(const TDesC8& aKey, TInt aEffectiveKeyLenBits);
sl@0: 	
sl@0: 	// From CBlockTransform
sl@0: 	TInt BlockSize() const;
sl@0: 	void Transform(TDes8& aBlock);
sl@0: 	void Reset(void);
sl@0: 	TInt KeySize(void) const;
sl@0: 	
sl@0: 	/// Destructor
sl@0: 	~CRC2DecryptorShim();
sl@0: 	
sl@0: private:
sl@0: 	/// Constructor	
sl@0: 	CRC2DecryptorShim();	
sl@0: 	void ConstructL(const TDesC8& aKey, TInt aEffectiveKeyLenBits);	
sl@0: 	
sl@0: 	/**
sl@0: 	From CBase, to allow CBufferedTransform & CBlockChainingMode
sl@0: 	to determine whether the functionality may be delegated to
sl@0: 	the SPI object.
sl@0: 	*/ 
sl@0: 	TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1);
sl@0: 	
sl@0: private:	
sl@0: 	/// SPI delegate
sl@0: 	CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl;
sl@0: 		
sl@0: 	/// SPI requires all key to passed as key-objects
sl@0: 	CryptoSpi::CKey* iKey;		
sl@0: 	
sl@0: 	/// Temporary output block, SPI does not overwrite input
sl@0: 	/// RC2 uses 64bit blocks
sl@0: 	TBuf8<16> iOutputBlock;
sl@0: 	
sl@0: 	/// The effective key length is passed as an algorithm
sl@0: 	/// parameter. This allows it to be externalised.
sl@0: 	CryptoSpi::CCryptoParams* iAlgorithmParams;
sl@0: };
sl@0: 
sl@0: #endif // __RC2SHIM_H__