1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/security/cryptoplugins/cryptospiplugins/source/softwarecrypto/rc2impl.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,118 @@
     1.4 +/*
     1.5 +* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of the License "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +*
    1.19 +*/
    1.20 +
    1.21 +
    1.22 +#ifndef	__RC2_H__
    1.23 +#define	__RC2_H__
    1.24 +
    1.25 +/**
    1.26 +@file 
    1.27 +@internalComponent
    1.28 +@released
    1.29 +*/
    1.30 +
    1.31 +#include <e32base.h>
    1.32 +#include <e32cmn.h>
    1.33 +#include "keys.h"
    1.34 +#include "symmetriccipherimpl.h"
    1.35 +
    1.36 +/**
    1.37 +Plug-in class for RC2 block cipher
    1.38 +*/
    1.39 +namespace SoftwareCrypto
    1.40 +	{
    1.41 +	using namespace CryptoSpi;
    1.42 +	
    1.43 +	NONSHARABLE_CLASS(CRc2Impl) : public CSymmetricBlockCipherImpl
    1.44 +		{
    1.45 +	public:
    1.46 +		/**
    1.47 +		Creates an instance of an RC2 symmetric cipher plug-in.
    1.48 +		@param aKey The key
    1.49 +		@param aCryptoMode Whether to encrypt or decrypt
    1.50 +		@param aOperationMode The block cipher mode ECB, CBC, CTR etc
    1.51 +		@param aPadding The padding scheme to use None, SSLv3, PKCS#7
    1.52 +		@param aEffectiveKeyLenBits The effective key length in bits
    1.53 +		@return A pointer to a CRc2Impl instance
    1.54 +		*/
    1.55 +		static CRc2Impl* NewL(const CKey& aKey, 
    1.56 +			TUid aCryptoMode, TUid aOperationMode, TUid aPadding, TInt aEffectiveKeyLenBits);
    1.57 +
    1.58 +		/**
    1.59 +		Creates an instance of an RC2 symmetric cipher plug-in.
    1.60 +		A pointer to the plug-in instance is placed on the cleanup stack.
    1.61 +		@param aKey The key
    1.62 +		@param aCryptoMode Whether to encrypt or decrypt
    1.63 +		@param aOperationMode The block cipher mode ECB, CBC, CTR etc
    1.64 +		@param aPadding The padding scheme to use None, SSLv3, PKCS#7
    1.65 +		@param aEffectiveKeyLenBits The effective key length in bits
    1.66 +		@return A pointer to a CRc2Impl instance
    1.67 +		*/
    1.68 +		static CRc2Impl* NewLC(const CKey& aKey, 
    1.69 +			TUid aCryptoMode, TUid aOperationMode, TUid aPadding, TInt aEffectiveKeyLenBits);
    1.70 +		
    1.71 +		// From CSymmetricCipherImpl
    1.72 +		TBool IsValidKeyLength(TInt aKeyBytes) const;
    1.73 +		TUid ImplementationUid() const;
    1.74 +		TInt GetKeyStrength() const;
    1.75 +		const CExtendedCharacteristics* GetExtendedCharacteristicsL();
    1.76 +		
    1.77 +		static CExtendedCharacteristics* CreateExtendedCharacteristicsL();
    1.78 +				
    1.79 +		/// Destructor
    1.80 +		~CRc2Impl();
    1.81 +		
    1.82 +		/** SSL Effective Key Length Compatibility - for compatibility with SSL */
    1.83 +		static const TUint KDefaultEffectiveKeyLenBits = 1024;
    1.84 +
    1.85 +	private:
    1.86 +		/**
    1.87 +		Constructor
    1.88 +		@param aOperationMode The mode of operation e.g. CBC
    1.89 +		@param aCryptoMode Whether to encrypt or decrypt
    1.90 +		@param aPaddingMode The padding mode to use. None, SSL, PKCS#7
    1.91 +		*/
    1.92 +		CRc2Impl(TUid aOperationMode, TUid aCryptoMode, TUid aPaddingMode);
    1.93 +			
    1.94 +		///	second phase of construction	
    1.95 +		void ConstructL(const CKey& aKey, TInt aEffectiveKeyLenBits);
    1.96 +					
    1.97 +		/**
    1.98 +		Expands the key (iKey) to iEffectiveKeyLenBits and stores the result in iK
    1.99 +		*/
   1.100 +		void SetKeySchedule();
   1.101 +		
   1.102 +		// From CSymmetricBlockCipherImpl
   1.103 +		void TransformEncrypt(TUint8* aBuffer, TUint aNumBlocks);
   1.104 +		void TransformDecrypt(TUint8* aBuffer, TUint aNumBlocks);		
   1.105 +
   1.106 +	private:		
   1.107 +		static const TUint8 KRc2BlockBytes = 8;
   1.108 +		static const TInt KRc2MaxKeySizeBytes = 128;	
   1.109 +		static const TInt KRc2ExpandedKeyLen = 64;
   1.110 +		/**
   1.111 +	 	 The expanded key buffer.
   1.112 +		 Each iK[i] is a 16-bit word.
   1.113 +	 	 */
   1.114 +		TUint16 iK[KRc2ExpandedKeyLen];	//	128 bytes		
   1.115 +		
   1.116 +		/** The effective key length in bits */
   1.117 +		TInt iEffectiveKeyLenBits;	
   1.118 +		};
   1.119 +	}
   1.120 +
   1.121 +#endif //__RC2_H__