--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoplugins/cryptospiplugins/source/softwarecrypto/asymmetriccipherimpl.h	Fri Nov 06 13:21:00 2009 +0200
@@ -0,0 +1,137 @@
+/*
+* Copyright (c) 2007-2009 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 __ASYMMETRICCIPHERIMPL_H__
+#define __ASYMMETRICCIPHERIMPL_H__
+
+/**
+@file 
+@internalComponent
+@released
+*/
+
+#include <e32base.h>
+#include <cryptospi/cryptospidef.h>
+#include <padding.h>
+#include "asymmetriccipherplugin.h"
+#include "keys.h"
+#include "common/inlines.h"
+
+/**
+ * Abstract base class for symmetric cipher plug-ins.
+ */
+namespace SoftwareCrypto
+	{
+	using namespace CryptoSpi;
+	
+	NONSHARABLE_CLASS(CAsymmetricCipherImpl) : public CBase, public MAsymmetricCipher
+		{
+	public:
+		
+		// Override MPlugin virtual functions
+		void Close();
+		void Reset(); // Always call reset in super-class if you override this
+		TAny* GetExtension(TUid aExtensionId);
+		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);
+		// End of MPlugin
+		
+		// Override MAsymmetricCipherBase virtual functions
+		void SetKeyL(const CKey& aKey);             // override DoSetKeyL instead
+		void SetCryptoModeL(TUid aCryptoMode);      // override DoSetCryptoModeL instead
+		void SetPaddingModeL(TUid aPaddingMode);    // override DoSetPaddingModeL instead
+		virtual TInt GetMaximumInputLengthL() const;
+		virtual TInt GetMaximumOutputLengthL() const;
+		// End of MAsymmetricCipherBase
+		
+		// Override MAsymmetricCipher virtual functions
+		virtual void ProcessL(const TDesC8& aInput, TDes8& aOutput) = 0;
+		// End of MAsymmetricCipher
+		
+		/// Destructor
+		~CAsymmetricCipherImpl();
+		
+	protected:
+		/**
+		Constructor
+		@param aCryptoMode Whether to encrypt or decrypt
+		@param aPaddingMode The padding mode
+		*/
+		CAsymmetricCipherImpl(TUid aCryptoMode, TUid aPaddingMode);
+
+		/**
+		Second phase of construction. Always call ConstructL in the super-class
+		if you override this method.
+		
+		@param aKey The key to initialise the cipher with.
+		*/
+		virtual void ConstructL(const CKey& aKey);
+		
+		/**
+		Implemented by each cipher subclass to determine whether the
+		specified key length is valid for that cipher.
+		This is called by ConstructL and SetKeyL
+		@param aKeyBytes The key length in bytes to verify.
+		@return ETrue if key length is acceptable
+		*/
+		virtual TBool IsValidKeyLengthL(TInt aKeyBytes) const = 0;
+		
+		/**
+		Helper function implemented by concrete cipher sub-class that allows
+		GetCharacteristicsL to return the correct characteristics object.
+		@return The implemention uid
+		*/
+		virtual TUid ImplementationUid() const = 0;
+		
+		/**
+		Validates and sets the crypto mode (iCryptoMode)
+		@param aCryptoMode The crypto mode
+		*/	
+		virtual void DoSetCryptoModeL(TUid aCryptoMode);
+		
+		/**
+		Extracts the raw key from aKey and sets iKey and iKeyBytes
+		The key length is also checked to meet export restrictions and
+		to ensure that it is appropriate for the cipher.
+		@param aKey The key
+		*/
+		virtual void DoSetKeyL(const CKey& aKey);
+		
+		/**
+		Validates and sets the padding mode (iPaddingMode & iPadding)
+		@param aPadding The desired padding mode
+		*/
+		virtual void DoSetPaddingModeL(TUid aPadding);
+		
+	private:
+			
+	protected:
+		/// encryption or decryption
+		TUid iCryptoMode;
+		
+		/// the current padding scheme
+		TUid iPaddingMode;
+		
+		/// the key
+		CKey* iKey;
+		
+		/// current padding scheme implementation
+		CPadding* iPadding;
+		};
+	}
+
+#endif	//	__ASYMMETRICCIPHERIMPL_H__