/*+
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* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).+
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of the License "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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*+
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* Description: +
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*+
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*/+
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+
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+
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#ifndef __DSAKEYPAIRGENIMPL_H__+
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#define __DSAKEYPAIRGENIMPL_H__+
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+
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/**+
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@file +
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@internalComponent+
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@released+
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*/+
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+
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#include <e32base.h>+
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#include <e32cmn.h>+
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#include "keypairgenimpl.h"+
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//#include <asymmetrickeys.h>+
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+
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/**+
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 * Implementation of DSA key pair generation.+
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 */+
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namespace SoftwareCrypto+
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	{+
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	NONSHARABLE_CLASS(CDSAPrimeCertificate) : public CBase+
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		{+
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	public:+
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		/** +
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		Creates a new DSA prime certificate from a specified +
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		seed and counter value.+
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 +
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		@param aSeed	The seed from a DSA key generation process+
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		@param aCounter	The counter value from a DSA key generation process+
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		@return			A pointer to a CDSAPrimeCertificate instance+
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		*/+
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		static CDSAPrimeCertificate* NewL(const TDesC8& aSeed, TUint aCounter);+
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+
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		/** +
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		Creates a new DSA prime certificate from a specified +
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		seed and counter value.+
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		+
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		The returned pointer is put onto the cleanup stack.+
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		+
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		@param aSeed		The seed from a DSA key generation process+
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		@param aCounter	The counter value from a DSA key generation process+
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		@return			A pointer to a CDSAPrimeCertificate instance+
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		*/+
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		static CDSAPrimeCertificate* NewLC(const TDesC8& aSeed, TUint aCounter);+
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+
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		/**+
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		Gets the seed of the DSA prime certificate+
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		@return	The seed+
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		*/+
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		const TDesC8& Seed() const;+
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		+
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		/**+
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		Gets the counter value of the DSA prime certificate+
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+
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		@return	The counter's value+
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		*/+
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		TUint Counter() const;+
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		+
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		/** +
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		Destructor +
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		*/+
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		~CDSAPrimeCertificate();+
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		+
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	protected:+
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		/** +
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		Constructor+
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		@param aCounter	The DSA key generation counter+
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		*/+
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		CDSAPrimeCertificate(TUint aCounter);+
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+
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		/**+
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		Default constructor+
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		*/+
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		CDSAPrimeCertificate();+
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+
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		void ConstructL(const TDesC8& aSeed);+
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		+
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	protected:+
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		/** +
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		The DSA key generation seed +
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		*/+
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		const HBufC8* iSeed;+
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		/** +
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		The DSA key generation counter +
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		*/+
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		TUint iCounter;+
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	private:+
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		CDSAPrimeCertificate(const CDSAPrimeCertificate&);+
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		CDSAPrimeCertificate& operator=(const CDSAPrimeCertificate&);+
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		};+
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		+
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	NONSHARABLE_CLASS(CDSAKeyPairGenImpl) : public CKeyPairGenImpl+
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		{+
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	public:+
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	+
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		static CDSAKeyPairGenImpl* NewL();+
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		static CDSAKeyPairGenImpl* NewLC();+
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+
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		// from MPlugin+
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		void Reset();+
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+
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		// from MKeyPairGenerator+
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		void GenerateKeyPairL(TInt aKeySize, const CCryptoParams& aKeyParameters, CKeyPair*& aKeyPair);+
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		+
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		// Override CKeyPairGenImpl virtual functions+
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		TUid ImplementationUid() const;+
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		+
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		// Destructor+
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		~CDSAKeyPairGenImpl();+
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+
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		static TBool GeneratePrimesL(const TDesC8& aSeed,+
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									 TUint& aCounter, +
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									 RInteger& aP, +
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									 TUint aL, +
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									 RInteger& aQ, +
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									 TBool aUseInputCounter=EFalse);+
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									 +
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		static TBool ValidPrimeLength(TUint aPrimeBits);+
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		+
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	private:+
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		/**+
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		Constructor+
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		*/+
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		CDSAKeyPairGenImpl();+
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			+
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		/// second phase of construction+
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		void ConstructL();+
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		+
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		CDSAPrimeCertificate* iPrimeCertificate;+
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		};+
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	}+
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+
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#endif // __DSAKEYPAIRGENIMPL_H__+
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