1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/security/cryptoplugins/cryptospiplugins/source/softwarecrypto/rsafunction.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,85 @@
     1.4 +/*
     1.5 +* Copyright (c) 2003-2009 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 +/**
    1.23 + @file
    1.24 + @internalComponent
    1.25 + @released
    1.26 +*/
    1.27 +
    1.28 +#ifndef __RSAFUNCTION_H__
    1.29 +#define __RSAFUNCTION_H__
    1.30 +
    1.31 +#include <e32base.h>
    1.32 +#include "keys.h"
    1.33 +
    1.34 +using namespace CryptoSpi;
    1.35 +
    1.36 +class TInteger;
    1.37 +
    1.38 +class RSAFunction
    1.39 +	{
    1.40 +public:
    1.41 +	static inline TBool IsInputValid(const TInteger& aInput, 
    1.42 +		const TInteger& aModulus);
    1.43 +	static inline void IsInputValidL(const TInteger& aInput, 
    1.44 +		const TInteger& aModulus);
    1.45 +	static void EncryptL(const CKey& aPublicKey,
    1.46 +		const TInteger& aInput, RInteger& aOutput);
    1.47 +	static void DecryptL(const CKey& aPrivateKey,
    1.48 +		const TInteger& aInput, RInteger& aOutput);
    1.49 +	static void SignL(const CKey& aPrivateKey,
    1.50 +		const TInteger& aInput, RInteger& aOutput);
    1.51 +	static void VerifyL(const CKey& aPublicKey,
    1.52 +		const TInteger& aInput, RInteger& aOutput);
    1.53 +private:
    1.54 +	static void FunctionL(const TInteger& aModulus, const TInteger& aExponent,
    1.55 +		const TInteger& aBase, RInteger& aOutput);
    1.56 +	static void FunctionCRTL(const CKey& aPrivateKey,
    1.57 +		const TInteger& aInput, RInteger& aOutput);
    1.58 +private:
    1.59 +	RSAFunction(void);
    1.60 +	};
    1.61 +
    1.62 +/** Computes whether a given message representative is within the valid bounds
    1.63 + * for a given modulus, i.e. whether the message is representative within [0,n-1].
    1.64 + * @param aInput The message representative.
    1.65 + * @param aModulus The modulus.
    1.66 + * @return TBool representing whether or not the message representative is
    1.67 + * valid.
    1.68 + */
    1.69 +TBool RSAFunction::IsInputValid(const TInteger& aInput, 
    1.70 +	const TInteger& aModulus)
    1.71 +	{
    1.72 +	//See HAC 8.3 1.b
    1.73 +	//Message (input) must be in the interval [0,n-1] (inclusive)
    1.74 +	if( aInput.IsNegative() || aInput >= aModulus )
    1.75 +		return EFalse;
    1.76 +	else
    1.77 +		return ETrue;
    1.78 +	}
    1.79 +
    1.80 +void RSAFunction::IsInputValidL(const TInteger& aInput,
    1.81 +	const TInteger& aModulus)
    1.82 +	{
    1.83 +	if(!IsInputValid(aInput, aModulus))
    1.84 +		User::Leave(KErrArgument);
    1.85 +	}
    1.86 +
    1.87 +#endif
    1.88 +