--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoplugins/cryptospiplugins/source/softwarecrypto/rsaverifyimpl.cpp	Fri Nov 06 13:21:00 2009 +0200
@@ -0,0 +1,143 @@
+/*
+* Copyright (c) 2006-2009 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: 
+*
+*/
+
+
+#include "rsaverifyimpl.h"
+#include "pluginconfig.h"
+#include "rsafunction.h"
+
+using namespace SoftwareCrypto;
+
+// Implementation of CRSAVerifierImpl
+CRSAVerifierImpl* CRSAVerifierImpl::NewL(const CKey& aKey, TUid aPaddingMode)
+	{
+	CRSAVerifierImpl* self = CRSAVerifierImpl::NewLC(aKey, aPaddingMode);
+	CleanupStack::Pop(self);
+	return self;
+	}
+	
+CRSAVerifierImpl* CRSAVerifierImpl::NewLC(const CKey& aKey, TUid aPaddingMode)
+	{
+	CRSAVerifierImpl* self = new(ELeave) CRSAVerifierImpl(aPaddingMode);
+	CleanupStack::PushL(self);
+	self->ConstructL(aKey);
+	return self;
+	}
+
+CRSAVerifierImpl::CRSAVerifierImpl(TUid aPaddingMode)
+	: iPaddingMode(aPaddingMode)
+	{
+	}
+
+CRSAVerifierImpl::~CRSAVerifierImpl()
+	{
+	delete iPadding;
+	}
+	
+void CRSAVerifierImpl::ConstructL(const CKey& aKey)
+	{
+	CVerifierImpl::ConstructL(aKey);
+	SetPaddingModeL(iPaddingMode);
+	}
+	
+CExtendedCharacteristics* CRSAVerifierImpl::CreateExtendedCharacteristicsL()
+	{
+	// All Symbian software plug-ins have unlimited concurrency, cannot be reserved
+	// for exclusive use and are not CERTIFIED to be standards compliant.
+	return CExtendedCharacteristics::NewL(KMaxTInt, EFalse);
+	}
+
+const CExtendedCharacteristics* CRSAVerifierImpl::GetExtendedCharacteristicsL()
+	{
+	return CRSAVerifierImpl::CreateExtendedCharacteristicsL();
+	}
+
+TUid CRSAVerifierImpl::ImplementationUid() const
+	{
+	return KCryptoPluginRsaVerifierUid;
+	}
+
+void CRSAVerifierImpl::SetPaddingModeL(TUid aPaddingMode) 
+	{
+	CPadding* padding(0);
+	switch (aPaddingMode.iUid)
+		{
+		case KPaddingModeNone:
+			padding = CPaddingNone::NewL(GetMaximumOutputLengthL());
+			break;
+		case KPaddingModePkcs1_v1_5_Signature:
+			padding = CPaddingPKCS1Signature::NewL(GetMaximumOutputLengthL());
+			break;
+		default:
+			User::Leave(KErrNotSupported);
+		}
+	delete iPadding;
+	iPadding = padding;
+	iPaddingMode = aPaddingMode;
+	Reset();	
+	}
+
+void CRSAVerifierImpl::SetKeyL(const CKey& aPublicKey)
+	{
+	DoSetKeyL(aPublicKey);
+	Reset();	
+	}
+
+TInt CRSAVerifierImpl::GetMaximumInputLengthL() const
+	{
+	return GetMaximumOutputLengthL() - iPadding->MinPaddingLength();	
+	}
+
+TInt CRSAVerifierImpl::GetMaximumOutputLengthL() const
+	{
+	const TInteger& paramN = iKey->GetBigIntL(KRsaKeyParameterNUid);
+	return paramN.ByteCount();	
+	}
+
+void CRSAVerifierImpl::VerifyL(const TDesC8& aInput, const CCryptoParams& aSignature, TBool& aVerificationResult)
+	{
+	HBufC8* output = NULL;
+	InverseSignL(output, aSignature);
+	CleanupStack::PushL(output);
+
+	// is the original hash the same as the hash extracted from the signature
+	aVerificationResult = EFalse;
+	if (!output->Compare(aInput))
+		{
+		aVerificationResult = ETrue;
+		}
+	CleanupStack::PopAndDestroy(output);
+	}
+
+void CRSAVerifierImpl::InverseSignL(HBufC8*& aOutput, const CCryptoParams& aSignature)
+	{
+	// extract the original hash from the signature
+	const TInteger& signature = aSignature.GetBigIntL(KRsaSignatureParameterSUid);
+	RInteger output;
+	RSAFunction::VerifyL(*iKey, signature, output);
+	CleanupClosePushL(output);
+
+	// format the extracted hash so it can be compared with the original hash
+	HBufC8* paddedHashPtr = output.BufferLC();
+	aOutput = HBufC8::NewLC(GetMaximumOutputLengthL());
+	TPtr8 unpaddedHash = aOutput->Des();
+
+	iPadding->UnPadL(*paddedHashPtr, unpaddedHash);
+
+	CleanupStack::Pop(aOutput);
+	CleanupStack::PopAndDestroy(2, &output);
+	}