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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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*
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*/
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#include "rc2shim.h"
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#include <cryptospi/cryptoparams.h>
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#include <cryptospi/cryptosymmetriccipherapi.h>
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#include <cryptospi/cryptospidef.h>
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#include <cryptospi/plugincharacteristics.h>
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#include <cryptospi/keys.h>
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#include <cryptostrength.h>
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#include "../common/inlines.h"
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using namespace CryptoSpi;
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// CRC2EncryptorShim ////////////////////////////////////////////////////////
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CRC2EncryptorShim* CRC2EncryptorShim::NewL(const TDesC8& aKey, TInt aEffectiveKeyLenBits)
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{
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CRC2EncryptorShim* self = CRC2EncryptorShim::NewLC(aKey, aEffectiveKeyLenBits);
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CleanupStack::Pop(self);
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return self;
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}
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CRC2EncryptorShim* CRC2EncryptorShim::NewLC(const TDesC8& aKey, TInt aEffectiveKeyLenBits)
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{
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CRC2EncryptorShim* self = new (ELeave) CRC2EncryptorShim();
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CleanupStack::PushL(self);
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self->ConstructL(aKey, aEffectiveKeyLenBits);
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// weak enough if either aKey or aEffectiveKeyLenBits is weak
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TInt minKeySize = Min(aEffectiveKeyLenBits, BytesToBits(aKey.Size()));
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TCrypto::IsSymmetricWeakEnoughL(minKeySize);
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return self;
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}
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CRC2EncryptorShim::CRC2EncryptorShim()
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{
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}
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CRC2EncryptorShim::~CRC2EncryptorShim()
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{
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delete iSymmetricCipherImpl;
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delete iKey;
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delete iAlgorithmParams;
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}
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void CRC2EncryptorShim::ConstructL(const TDesC8& aKey, TInt aEffectiveKeyLenBits)
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{
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TKeyProperty keyProperty = {KRc2Uid, KNullUid, KSymmetricKeyUid, KNonEmbeddedKeyUid};
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CCryptoParams* keyParam =CCryptoParams::NewLC();
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keyParam->AddL(aKey, KSymmetricKeyParameterUid);
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iKey=CKey::NewL(keyProperty, *keyParam);
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CleanupStack::PopAndDestroy(keyParam);
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iAlgorithmParams = CCryptoParams::NewL();
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iAlgorithmParams->AddL(aEffectiveKeyLenBits, KRC2EffectiveKeyLenBits);
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CSymmetricCipherFactory::CreateSymmetricCipherL(
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iSymmetricCipherImpl,
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KRc2Uid,
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*iKey,
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KCryptoModeEncryptUid,
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KOperationModeECBUid,
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KPaddingModeNoneUid,
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iAlgorithmParams);
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}
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TInt CRC2EncryptorShim::BlockSize() const
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{
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// SPI returns block size in BITS
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return BitsToBytes(iSymmetricCipherImpl->BlockSize());
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}
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TInt CRC2EncryptorShim::KeySize() const
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{
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return iSymmetricCipherImpl->KeySize();
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}
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void CRC2EncryptorShim::Transform(TDes8& aBlock)
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{
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iOutputBlock.Zero();
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TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);)
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aBlock = iOutputBlock;
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}
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void CRC2EncryptorShim::Reset()
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{
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iSymmetricCipherImpl->Reset();
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}
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TInt CRC2EncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)
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{
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TInt ret(KErrExtensionNotSupported);
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if (KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl)
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{
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a0=iSymmetricCipherImpl;
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ret=KErrNone;
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}
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return ret;
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}
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// CRC2DecryptorShim ////////////////////////////////////////////////////////
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CRC2DecryptorShim* CRC2DecryptorShim::NewL(const TDesC8& aKey, TInt aEffectiveKeyLenBits)
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{
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CRC2DecryptorShim* self = CRC2DecryptorShim::NewLC(aKey, aEffectiveKeyLenBits);
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CleanupStack::Pop(self);
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return self;
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}
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CRC2DecryptorShim* CRC2DecryptorShim::NewLC(const TDesC8& aKey, TInt aEffectiveKeyLenBits)
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{
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CRC2DecryptorShim* self = new (ELeave) CRC2DecryptorShim();
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CleanupStack::PushL(self);
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self->ConstructL(aKey, aEffectiveKeyLenBits);
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// weak enough if either aKey or aEffectiveKeyLenBits is weak
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TInt minKeySize = Min(aEffectiveKeyLenBits, BytesToBits(aKey.Size()));
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TCrypto::IsSymmetricWeakEnoughL(minKeySize);
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return self;
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}
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CRC2DecryptorShim::CRC2DecryptorShim()
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{
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}
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CRC2DecryptorShim::~CRC2DecryptorShim()
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{
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delete iSymmetricCipherImpl;
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delete iKey;
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delete iAlgorithmParams;
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}
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void CRC2DecryptorShim::ConstructL(const TDesC8& aKey, TInt aEffectiveKeyLenBits)
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{
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TKeyProperty keyProperty = {KRc2Uid, KNullUid, KSymmetricKeyUid, KNonEmbeddedKeyUid};
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CCryptoParams* keyParam =CCryptoParams::NewLC();
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keyParam->AddL(aKey, KSymmetricKeyParameterUid);
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iKey=CKey::NewL(keyProperty, *keyParam);
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CleanupStack::PopAndDestroy(keyParam);
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iAlgorithmParams = CCryptoParams::NewL();
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iAlgorithmParams->AddL(aEffectiveKeyLenBits, KRC2EffectiveKeyLenBits);
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CSymmetricCipherFactory::CreateSymmetricCipherL(
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iSymmetricCipherImpl,
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KRc2Uid,
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*iKey,
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KCryptoModeDecryptUid,
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KOperationModeECBUid,
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KPaddingModeNoneUid,
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iAlgorithmParams);
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}
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TInt CRC2DecryptorShim::BlockSize() const
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{
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// SPI returns block size in BITS
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return BitsToBytes(iSymmetricCipherImpl->BlockSize());
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}
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TInt CRC2DecryptorShim::KeySize() const
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{
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return iSymmetricCipherImpl->KeySize();
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}
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void CRC2DecryptorShim::Transform(TDes8& aBlock)
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{
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iOutputBlock.Zero();
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TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);)
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aBlock = iOutputBlock;
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}
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void CRC2DecryptorShim::Reset()
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{
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iSymmetricCipherImpl->Reset();
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}
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TInt CRC2DecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)
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{
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TInt ret(KErrExtensionNotSupported);
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if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl)
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{
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a0=iSymmetricCipherImpl;
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ret=KErrNone;
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}
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return ret;
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}
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