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/*
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* Copyright (c) 2006-2009 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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#include "rsasignerimpl.h"
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#include "pluginconfig.h"
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#include "rsafunction.h"
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using namespace SoftwareCrypto;
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// Implementation of CRSASignerImpl
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CRSASignerImpl* CRSASignerImpl::NewL(const CKey& aKey, TUid aPaddingMode)
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{
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CRSASignerImpl* self = CRSASignerImpl::NewLC(aKey, aPaddingMode);
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CleanupStack::Pop(self);
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return self;
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}
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CRSASignerImpl* CRSASignerImpl::NewLC(const CKey& aKey, TUid aPaddingMode)
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{
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CRSASignerImpl* self = new(ELeave) CRSASignerImpl(aPaddingMode);
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CleanupStack::PushL(self);
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self->ConstructL(aKey);
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return self;
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}
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CRSASignerImpl::CRSASignerImpl(TUid aPaddingMode)
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: iPaddingMode(aPaddingMode)
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{
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}
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CRSASignerImpl::~CRSASignerImpl()
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{
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delete iPadding;
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}
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void CRSASignerImpl::ConstructL(const CKey& aKey)
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{
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CSignerImpl::ConstructL(aKey);
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SetPaddingModeL(iPaddingMode);
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}
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CExtendedCharacteristics* CRSASignerImpl::CreateExtendedCharacteristicsL()
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{
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// All Symbian software plug-ins have unlimited concurrency, cannot be reserved
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// for exclusive use and are not CERTIFIED to be standards compliant.
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return CExtendedCharacteristics::NewL(KMaxTInt, EFalse);
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}
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const CExtendedCharacteristics* CRSASignerImpl::GetExtendedCharacteristicsL()
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{
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return CRSASignerImpl::CreateExtendedCharacteristicsL();
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}
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TUid CRSASignerImpl::ImplementationUid() const
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{
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return KCryptoPluginRsaSignerUid;
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}
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void CRSASignerImpl::SetKeyL(const CKey& aPrivateKey)
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{
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DoSetKeyL(aPrivateKey);
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Reset();
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}
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void CRSASignerImpl::SetPaddingModeL(TUid aPaddingMode)
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{
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CPadding* padding(0);
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switch (aPaddingMode.iUid)
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{
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case KPaddingModeNone:
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padding = CPaddingNone::NewL(GetMaximumOutputLengthL());
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break;
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case KPaddingModePkcs1_v1_5_Signature:
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padding = CPaddingPKCS1Signature::NewL(GetMaximumOutputLengthL());
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break;
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default:
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User::Leave(KErrNotSupported);
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}
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delete iPadding;
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iPadding = padding;
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iPaddingMode = aPaddingMode;
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Reset();
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}
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TInt CRSASignerImpl::GetMaximumInputLengthL() const
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{
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return GetMaximumOutputLengthL() - iPadding->MinPaddingLength();
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}
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TInt CRSASignerImpl::GetMaximumOutputLengthL() const
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{
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const TInteger& paramN = iKey->GetBigIntL(KRsaKeyParameterNUid);
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return paramN.ByteCount();
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}
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void CRSASignerImpl::SignL(const TDesC8& aInput, CCryptoParams& aSignature)
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{
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HBufC8* buf = HBufC8::NewLC(GetMaximumOutputLengthL());
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TPtr8 ptr = buf->Des();
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//The following will panic if aInput is larger than MaxOutputLength() It is
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//likely that the caller has passed in something that has not been hashed.
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//This is a programming, and likely a security error, in client code, not a
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//problem here.
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iPadding->PadL(aInput, ptr);
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RInteger input = RInteger::NewL(ptr);
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CleanupClosePushL(input);
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RInteger output;
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RSAFunction::SignL(*iKey, input, output);
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CleanupClosePushL(output);
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aSignature.AddL(output, KRsaSignatureParameterSUid);
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CleanupStack::PopAndDestroy(3, buf); //input, buf
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}
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