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/*
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* Copyright (c) 2007-2009 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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/**
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@file
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@internalComponent
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@released
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*/
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#include "rijndaelimpl.h"
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#include "keys.h"
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#include "pluginconfig.h"
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using namespace HwCrypto;
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const TUint KAESKeyBytes128 = 16;
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const TUint KAESKeyBytes192 = 24;
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const TUint KAESKeyBytes256 = 32;
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const TUint KAESBlockBytes = 16;
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_LIT(KLddFileName,"cryptoldd.ldd");
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_LIT(KPddFileName,"crypto.h4.pdd");
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/* CRijndaelmpl*/
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CH4RijndaelImpl::CH4RijndaelImpl(
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TUid aCryptoMode,
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TUid aOperationMode,
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TUid aPadding) :
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CH4CipherImpl(KAESBlockBytes, aCryptoMode, aOperationMode, aPadding)
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{
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}
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CH4RijndaelImpl* CH4RijndaelImpl::NewL(const CKey& aKey, TUid aCryptoMode, TUid aOperationMode, TUid aPadding)
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{
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CH4RijndaelImpl* self = CH4RijndaelImpl::NewLC(aKey, aCryptoMode, aOperationMode, aPadding);
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CleanupStack::Pop(self);
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return self;
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}
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CH4RijndaelImpl* CH4RijndaelImpl::NewLC(const CKey& aKey, TUid aCryptoMode, TUid aOperationMode, TUid aPadding)
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{
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CH4RijndaelImpl* self = new(ELeave) CH4RijndaelImpl(aCryptoMode, aOperationMode, aPadding);
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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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CH4RijndaelImpl::~CH4RijndaelImpl()
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{
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iDriver.Close();
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}
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void CH4RijndaelImpl::ConstructL(const CKey& aKey)
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{
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// Load PDD
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TInt r = User::LoadPhysicalDevice(KPddFileName);
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if((r != KErrNone) && (r != KErrAlreadyExists)) User::Leave(r);
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// Load LDD
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r = User::LoadLogicalDevice(KLddFileName);
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if((r != KErrNone) && (r != KErrAlreadyExists)) User::Leave(r);
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CH4CipherImpl::ConstructL(aKey);
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}
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TUid CH4RijndaelImpl::ImplementationUid() const
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{
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return KCryptoPluginAesUid;
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}
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const CExtendedCharacteristics* CH4RijndaelImpl::GetExtendedCharacteristicsL()
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{
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return StaticGetExtendedCharacteristicsL();
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}
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CExtendedCharacteristics* CH4RijndaelImpl::StaticGetExtendedCharacteristicsL()
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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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TBool CH4RijndaelImpl::IsValidKeyLength(TInt aKeyBytes) const
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{
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switch(aKeyBytes)
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{
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case KAESKeyBytes128:
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case KAESKeyBytes192:
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case KAESKeyBytes256:
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return ETrue;
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default:
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return EFalse;
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}
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}
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void CH4RijndaelImpl::DoSetupL()
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{
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iDriver.Close();
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User::LeaveIfError(iDriver.Open());
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TBool encrypt = (iCryptoMode.iUid == KCryptoModeEncrypt);
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RCryptoDriver::TChainingMode chainingMode = (iOperationMode.iUid == KOperationModeCBC) ? (RCryptoDriver::ECbcMode) : (RCryptoDriver::EEcbMode);
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User::LeaveIfError(iDriver.SetAesConfig(encrypt, chainingMode, iKey->Des(), iIv));
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}
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void CH4RijndaelImpl::DoWriteL(const TUint8* aBuffer, TUint aNumBytes)
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{
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TPtrC8 ptr(aBuffer, aNumBytes);
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TRequestStatus status;
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iDriver.AesWrite(status, ptr);
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User::WaitForRequest(status);
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User::LeaveIfError(status.Int());
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}
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void CH4RijndaelImpl::DoReadL(TDes8 &aBuffer, TUint32 aLength)
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{
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TRequestStatus status;
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iDriver.AesRead(status, aBuffer, aLength);
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User::WaitForRequest(status);
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User::LeaveIfError(status.Int());
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}
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// End of file
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