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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 "3desshim.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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// C3DESEncryptorShim ////////////////////////////////////////////////////////
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C3DESEncryptorShim* C3DESEncryptorShim::NewL(const TDesC8& aKey)
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{
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C3DESEncryptorShim* self = C3DESEncryptorShim::NewLC(aKey);
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CleanupStack::Pop(self);
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return self;
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}
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C3DESEncryptorShim* C3DESEncryptorShim::NewLC(const TDesC8& aKey)
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{
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C3DESEncryptorShim* self = new (ELeave) C3DESEncryptorShim();
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CleanupStack::PushL(self);
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self->ConstructL(aKey);
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// DES only used 7 bits out of every key byte
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TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size());
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return self;
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}
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C3DESEncryptorShim::C3DESEncryptorShim()
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{
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}
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C3DESEncryptorShim::~C3DESEncryptorShim()
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{
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delete iSymmetricCipherImpl;
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delete iKey;
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}
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void C3DESEncryptorShim::ConstructL(const TDesC8& aKey)
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{
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TKeyProperty keyProperty = {K3DesUid, KNullUid, KSymmetricKey, 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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CSymmetricCipherFactory::CreateSymmetricCipherL(
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iSymmetricCipherImpl,
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K3DesUid,
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*iKey,
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KCryptoModeEncryptUid,
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KOperationModeECBUid,
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KPaddingModeNoneUid,
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NULL);
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}
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TInt C3DESEncryptorShim::BlockSize() const
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{
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// SPI returns block size in BITS
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return iSymmetricCipherImpl->BlockSize() >> 3;
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}
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TInt C3DESEncryptorShim::KeySize() const
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{
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return iSymmetricCipherImpl->KeySize();
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}
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void C3DESEncryptorShim::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 C3DESEncryptorShim::Reset()
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{
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iSymmetricCipherImpl->Reset();
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}
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TInt C3DESEncryptorShim::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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// C3DESDecryptorShim ////////////////////////////////////////////////////////
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C3DESDecryptorShim* C3DESDecryptorShim::NewL(const TDesC8& aKey)
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{
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C3DESDecryptorShim* self = C3DESDecryptorShim::NewLC(aKey);
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CleanupStack::Pop(self);
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return self;
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}
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C3DESDecryptorShim* C3DESDecryptorShim::NewLC(const TDesC8& aKey)
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{
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C3DESDecryptorShim* self = new (ELeave) C3DESDecryptorShim();
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CleanupStack::PushL(self);
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self->ConstructL(aKey);
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// DES only used 7 bits out of every key byte
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TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size());
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return self;
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}
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C3DESDecryptorShim::C3DESDecryptorShim()
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{
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}
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C3DESDecryptorShim::~C3DESDecryptorShim()
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{
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delete iSymmetricCipherImpl;
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delete iKey;
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}
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void C3DESDecryptorShim::ConstructL(const TDesC8& aKey)
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{
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TKeyProperty keyProperty = {K3DesUid, KNullUid, KSymmetricKey, 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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CSymmetricCipherFactory::CreateSymmetricCipherL(
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iSymmetricCipherImpl,
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K3DesUid,
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*iKey,
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KCryptoModeDecryptUid,
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KOperationModeECBUid,
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KPaddingModeNoneUid,
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NULL);
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}
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TInt C3DESDecryptorShim::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 C3DESDecryptorShim::KeySize() const
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{
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return iSymmetricCipherImpl->KeySize();
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}
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void C3DESDecryptorShim::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 C3DESDecryptorShim::Reset()
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{
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iSymmetricCipherImpl->Reset();
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}
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TInt C3DESDecryptorShim::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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