diff -r 8873e6835f7b -r dd83586b62d6 crypto/weakcrypto/source/bigint/mont.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/crypto/weakcrypto/source/bigint/mont.h Fri Jun 11 15:32:35 2010 +0300 @@ -0,0 +1,59 @@ +/* +* Copyright (c) 2003-2009 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: +* CMontgomeryStructure class implementation +* +*/ + + +/** + @file + @internalComponent +*/ + +#ifndef __MONT_H__ +#define __MONT_H__ + +class TInteger; +class RInteger; + +/** A special representation of integers allowing efficient multiplication + * and exponentiation under special conditions. + * @internalComponent + */ +class CMontgomeryStructure : public CBase + { +public: + static CMontgomeryStructure* NewL(const TInteger& aModulus); + static CMontgomeryStructure* NewLC(const TInteger& aModulus); + ~CMontgomeryStructure(); + const TInteger& ReduceL(const TInteger& aInteger) const; + const TInteger& MultiplyL(const TInteger& aA, const TInteger& aB) const; + const TInteger& ExponentiateL(const TInteger& aBase, const TInteger& aExponent) const; + const TInteger& SquareL(const TInteger& aA) const; +protected: + void DoMultiplyL(TInteger& aResult, const TInteger& aA, const TInteger& aB) const; + void DoSquareL(TInteger& aResult, const TInteger& aA) const; + TInteger& ConvertInL(TInteger& aInteger) const; + TInteger& ConvertOutL(TInteger& aInteger) const; + CMontgomeryStructure(); +private: + void ConstructL(const TInteger& aModulus); + RInteger iModulus; + RInteger iModulusInv; + RInteger iWorkspace; + mutable RInteger iResult; + }; + +#endif // __MONT_H__