--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoplugins/cryptospiplugins/source/softwarecrypto/3desimpl.h	Fri Nov 06 13:21:00 2009 +0200
@@ -0,0 +1,113 @@
+/*
+* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#ifndef	__3DESIMPL_H__
+#define	__3DESIMPL_H__
+
+/**
+@file 
+@internalComponent
+@released
+*/
+
+#include <e32base.h>
+#include <e32cmn.h>
+#include "keys.h"
+#include "desimpl.h"
+
+/**
+Plug-in class for 3DES block cipher
+*/
+namespace SoftwareCrypto
+	{
+	using namespace CryptoSpi;
+	
+	NONSHARABLE_CLASS(C3DesImpl) : public CDesImpl
+		{
+	public:
+		/**
+		Creates an instance of a 3DES (Data Encryption Standard) symmetric cipher plug-in.
+		@param aKey The key
+		@param aCryptoMode Whether to encrypt or decrypt
+		@param aOperationMode The block cipher mode ECB, CBC, CTR etc
+		@param aPadding The padding scheme to use None, SSLv3, PKCS#7
+		@return A pointer to a C3DesImpl instance
+		*/
+		static C3DesImpl* NewL(const CKey& aKey, 
+			TUid aCryptoMode, TUid aOperationMode, TUid aPadding);
+
+		/**
+		Creates an instance of a 3DES (Data Encryption Standard) symmetric cipher plug-in.
+		A pointer to the plug-in instance is placed on the cleanup stack.
+		@param aKey The key
+		@param aCryptoMode Whether to encrypt or decrypt
+		@param aOperationMode The block cipher mode ECB, CBC, CTR etc
+		@param aPadding The padding scheme to use None, SSLv3, PKCS#7
+		@return A pointer to a C3DesImpl instance
+		*/
+		static C3DesImpl* NewLC(const CKey& aKey, 
+			TUid aCryptoMode, TUid aOperationMode, TUid aPadding);
+		
+		// From CSymmetricCipherImpl
+		TBool IsValidKeyLength(TInt aKeyBytes) const;
+		TInt GetKeyStrength() const;
+		TUid ImplementationUid() const;
+		const CExtendedCharacteristics* GetExtendedCharacteristicsL();
+		
+		static CExtendedCharacteristics* CreateExtendedCharacteristicsL();
+				
+		/// 3Destructor
+		~C3DesImpl();
+
+	private:
+		/**
+		Constructor
+		@param aOperationMode The mode of operation e.g. CBC
+		@param aCryptoMode Whether to encrypt or decrypt
+		@param aPaddingMode The padding mode to use. None, SSL, PKCS#7
+		*/
+		C3DesImpl(TUid aOperationMode, TUid aCryptoMode, TUid aPaddingMode);
+			
+		///	second phase of construction	
+		void ConstructL(const CKey& aKey);						
+
+		/**
+		Creates the key schedules iK1, iK2, iK3 from CBlockTransformationImpl::iKey.
+		This should be called from ConstructL and Reset
+		*/
+		void SetKeySchedule();
+
+		// From CSymmetricBlockCipherImpl
+		void TransformEncrypt(TUint8* aBuffer, TUint aNumBlocks);
+		void TransformDecrypt(TUint8* aBuffer, TUint aNumBlocks);
+		
+	private:
+		/// Size of the key schedule in words
+		static const TUint KKeyScheduleSize = 32;
+		
+		/// the key schedules
+		TUint32 iK1[KKeyScheduleSize];
+		TUint32 iK2[KKeyScheduleSize];
+		TUint32 iK3[KKeyScheduleSize];
+		
+		static const TUint8 K3DesBlockBytes = 8;
+		static const TUint8 K3DesKeyBytes = 24;
+		};
+	}
+
+#endif // __3DESIMPL_H__