sl@0: /*
sl@0: * Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include "dsashim.h"
sl@0: #include <cryptospi/cryptosignatureapi.h>
sl@0: #include <cryptospi/cryptospidef.h>
sl@0: #include <cryptospi/keys.h>
sl@0: #include "keyconverter.h"
sl@0: 
sl@0: #include "../common/inlines.h"
sl@0: 
sl@0: 
sl@0: using namespace CryptoSpi;
sl@0: 
sl@0: // CDsaSignerShim ////////////////////////////////////////////////////////
sl@0: 
sl@0: CDsaSignerShim* CDsaSignerShim::NewL(const CDSAPrivateKey& aKey)
sl@0: 	{
sl@0: 	CDsaSignerShim* self = CDsaSignerShim::NewLC(aKey);
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDsaSignerShim* CDsaSignerShim::NewLC(const CDSAPrivateKey& aKey)
sl@0: 	{
sl@0: 	CDsaSignerShim* self = new (ELeave) CDsaSignerShim(aKey);
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aKey);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDsaSignerShim::CDsaSignerShim(const CDSAPrivateKey& aKey)
sl@0: 	: CDSASigner(aKey)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CDsaSignerShim::~CDsaSignerShim()
sl@0: 	{
sl@0: 	delete iSignerImpl;
sl@0: 	delete iKey;
sl@0: 	}
sl@0: 
sl@0: void CDsaSignerShim::ConstructL(const CDSAPrivateKey& aKey)
sl@0: 	{
sl@0: 	iKey = KeyConverter::CreateKeyL(aKey);
sl@0: 	CSignatureFactory::CreateSignerL(
sl@0: 									iSignerImpl,
sl@0: 									KDsaSignerUid,
sl@0: 									*iKey,
sl@0: 									KPaddingModeNoneUid,
sl@0: 									NULL);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: CDSASignature* CDsaSignerShim::SignL(const TDesC8& aInput) const
sl@0: 	{
sl@0: 	//Sign the input data
sl@0: 	CCryptoParams* signature = CCryptoParams::NewLC();
sl@0: 	iSignerImpl->SignL(aInput, *signature);
sl@0: 	
sl@0: 	//Retrieve the R&S in DSA signature from the array 
sl@0: 	const TInteger& cR=signature->GetBigIntL(KDsaSignatureParameterRUid);
sl@0: 	const TInteger& cS=signature->GetBigIntL(KDsaSignatureParameterSUid);
sl@0: 	
sl@0: 	
sl@0: 	//Make copies of the DSA signature
sl@0: 	RInteger r=RInteger::NewL(cR);
sl@0: 	CleanupClosePushL(r);
sl@0: 	RInteger s=RInteger::NewL(cS);
sl@0: 	CleanupClosePushL(s);	
sl@0: 	
sl@0: 	//Create the DSA signature object, the ownership of r&s is transfered to dsaSig
sl@0: 	CDSASignature* dsaSig=CDSASignature::NewL(r, s);
sl@0: 	
sl@0: 	//Cleanup
sl@0: 	CleanupStack::Pop(2, &r); 	
sl@0: 	CleanupStack::PopAndDestroy(signature);
sl@0: 	
sl@0: 	return dsaSig;
sl@0: 	}
sl@0: 
sl@0: TInt CDsaSignerShim::MaxInputLength() const
sl@0: 	{
sl@0: 	TInt maxInputLength=0; 
sl@0: 	TRAPD(err, maxInputLength=iSignerImpl->GetMaximumInputLengthL())
sl@0: 	if (err==KErrNone)
sl@0: 		{
sl@0: 		return maxInputLength;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		return err;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: // CDsaVerifierShim ////////////////////////////////////////////////////////
sl@0: CDsaVerifierShim* CDsaVerifierShim::NewL(const CDSAPublicKey& aKey)
sl@0: 	{
sl@0: 	CDsaVerifierShim* self = CDsaVerifierShim::NewLC(aKey);
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDsaVerifierShim* CDsaVerifierShim::NewLC(const CDSAPublicKey& aKey)
sl@0: 	{
sl@0: 	CDsaVerifierShim* self = new (ELeave) CDsaVerifierShim(aKey);
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aKey);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDsaVerifierShim::CDsaVerifierShim(const CDSAPublicKey& aKey)
sl@0: 	: CDSAVerifier(aKey)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CDsaVerifierShim::~CDsaVerifierShim()
sl@0: 	{
sl@0: 	delete iVerifierImpl;
sl@0: 	delete iKey;
sl@0: 	}
sl@0: 
sl@0: void CDsaVerifierShim::ConstructL(const CDSAPublicKey& aKey)
sl@0: 	{
sl@0: 	iKey = KeyConverter::CreateKeyL(aKey);
sl@0: 	CSignatureFactory::CreateVerifierL(
sl@0: 									iVerifierImpl,
sl@0: 									KDsaVerifierUid,
sl@0: 									*iKey,
sl@0: 									KPaddingModeNoneUid,
sl@0: 									NULL);
sl@0: 											
sl@0: 	}
sl@0: 
sl@0: TBool CDsaVerifierShim::VerifyL(const TDesC8& aInput, const CDSASignature& aSignature) const
sl@0: 	{
sl@0: 	//create the array format dsa signature for the new crypto spi
sl@0: 	CCryptoParams* dsaSig = CCryptoParams::NewLC();
sl@0: 
sl@0: 	dsaSig->AddL(aSignature.R(), KDsaSignatureParameterRUid);
sl@0: 	dsaSig->AddL(aSignature.S(), KDsaSignatureParameterSUid);
sl@0: 
sl@0: 	//pass the signature and input to the new crypto spi to be verified
sl@0: 	TBool verificationResult=EFalse;
sl@0: 	iVerifierImpl->VerifyL(aInput, *dsaSig, verificationResult);
sl@0: 
sl@0: 	//Cleanup the array
sl@0: 	CleanupStack::PopAndDestroy(dsaSig);
sl@0: 
sl@0: 	return verificationResult;
sl@0: 	}
sl@0: 
sl@0: TInt CDsaVerifierShim::MaxInputLength() const
sl@0: 	{
sl@0: 	TInt maxInputLength=0; 
sl@0: 	TRAPD(err, maxInputLength=iVerifierImpl->GetMaximumInputLengthL())
sl@0: 	if (err==KErrNone)
sl@0: 		{
sl@0: 		return maxInputLength;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		return err;
sl@0: 		}
sl@0: 	}
sl@0: