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/*
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* Copyright (c) 2006-2010 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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* blocktransformationshim.cpp
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*
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*/
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#include "bufferedtransformationshim.h"
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#include <cryptospi/cryptospidef.h>
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#include <padding.h>
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#include <cryptospi/cryptosymmetriccipherapi.h>
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#include <cryptospi/plugincharacteristics.h>
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#include "../common/inlines.h"
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// CBufferedEncryptorShim
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CBufferedEncryptorShim::CBufferedEncryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) :
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iSymmetricCipherImpl(aSymmetricCipherImpl)
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{
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}
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CBufferedEncryptorShim* CBufferedEncryptorShim::NewL(CBlockTransformation* aBT, CPadding* aPadding)
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{
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CBufferedEncryptorShim* self(0);
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// Check whether the block transform contains an SPI plug-in
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TAny* implPtr(0);
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TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL);
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if (err == KErrNone && implPtr)
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{
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CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr));
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const CryptoSpi::TCharacteristics* c(0);
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impl->GetCharacteristicsL(c);
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const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics(
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static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c));
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// See if the padding mode is recognised by CryptoSpi and if so, check
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// whether the plug-in supports that padding mode.
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TUid paddingMode;
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TAny* paddingPtr = &paddingMode;
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err = aPadding->GetExtension(CryptoSpi::KPaddingInterface, paddingPtr, 0);
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if (err == KErrNone && cipherCharacteristics->IsPaddingModeSupported(paddingMode))
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{
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impl->SetCryptoModeL(CryptoSpi::KCryptoModeEncryptUid);
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impl->SetPaddingModeL(paddingMode);
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self = new(ELeave) CBufferedEncryptorShim(impl);
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CleanupStack::PushL(self);
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self->ConstructL(aBT, aPadding);
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CleanupStack::Pop(self);
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}
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}
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return self;
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}
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void CBufferedEncryptorShim::ConstructL(CBlockTransformation* aBT, CPadding* aPadding)
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{
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CBufferedEncryptor::ConstructL(aBT, aPadding);
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}
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void CBufferedEncryptorShim::Process(const TDesC8& aInput, TDes8& aOutput)
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{
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TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)
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}
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TInt CBufferedEncryptorShim::MaxOutputLength(TInt aInputLength) const
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{
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return iSymmetricCipherImpl->MaxOutputLength(aInputLength);
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}
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void CBufferedEncryptorShim::Reset()
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{
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iSymmetricCipherImpl->Reset();
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}
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TInt CBufferedEncryptorShim::BlockSize() const
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{
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return BitsToBytes(iSymmetricCipherImpl->BlockSize());
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}
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TInt CBufferedEncryptorShim::KeySize() const
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{
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return iSymmetricCipherImpl->KeySize();
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}
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void CBufferedEncryptorShim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)
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{
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iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);
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}
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TInt CBufferedEncryptorShim::MaxFinalOutputLength(TInt aInputLength) const
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{
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return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);
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}
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// CBufferedDecryptorShim
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CBufferedDecryptorShim::CBufferedDecryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) :
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iSymmetricCipherImpl(aSymmetricCipherImpl)
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{
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}
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CBufferedDecryptorShim* CBufferedDecryptorShim::NewL(CBlockTransformation* aBT, CPadding* aPadding)
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{
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CBufferedDecryptorShim* self(0);
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// Check whether the block transform contains an SPI plug-in
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TAny* implPtr(0);
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TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL);
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if (err == KErrNone && implPtr)
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{
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CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr));
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const CryptoSpi::TCharacteristics* c(0);
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impl->GetCharacteristicsL(c);
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const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics(
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static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c));
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// See if the padding mode is recognised by CryptoSpi and if so, check
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// whether the plug-in supports that padding mode.
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TUid paddingMode;
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TAny* paddingPtr = &paddingMode;
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err = aPadding->GetExtension(CryptoSpi::KPaddingInterface, paddingPtr, 0);
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if (err == KErrNone && cipherCharacteristics->IsPaddingModeSupported(paddingMode))
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{
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impl->SetCryptoModeL(CryptoSpi::KCryptoModeDecryptUid);
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impl->SetPaddingModeL(paddingMode);
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self = new(ELeave) CBufferedDecryptorShim(impl);
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CleanupStack::PushL(self);
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self->ConstructL(aBT, aPadding);
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CleanupStack::Pop(self);
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}
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}
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return self;
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}
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void CBufferedDecryptorShim::ConstructL(CBlockTransformation* aBT, CPadding* aPadding)
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{
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CBufferedDecryptor::ConstructL(aBT, aPadding);
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}
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void CBufferedDecryptorShim::Process(const TDesC8& aInput, TDes8& aOutput)
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{
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TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)
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}
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TInt CBufferedDecryptorShim::MaxOutputLength(TInt aInputLength) const
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{
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return iSymmetricCipherImpl->MaxOutputLength(aInputLength);
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}
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void CBufferedDecryptorShim::Reset()
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{
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iSymmetricCipherImpl->Reset();
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}
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TInt CBufferedDecryptorShim::BlockSize() const
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{
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return BitsToBytes(iSymmetricCipherImpl->BlockSize());
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}
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TInt CBufferedDecryptorShim::KeySize() const
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{
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return iSymmetricCipherImpl->KeySize();
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}
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void CBufferedDecryptorShim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)
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{
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iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);
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}
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TInt CBufferedDecryptorShim::MaxFinalOutputLength(TInt aInputLength) const
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{
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return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);
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}
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