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/*
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* Copyright (c) 2003-2009 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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#ifndef __DES_INL__
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#define __DES_INL__
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inline void IPerm(TUint32& left, TUint32& right)
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{
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TUint32 work;
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right = rotlFixed(right, 4U);
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work = (left ^ right) & 0xf0f0f0f0;
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left ^= work;
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right = rotrFixed(right^work, 20U);
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work = (left ^ right) & 0xffff0000;
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left ^= work;
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right = rotrFixed(right^work, 18U);
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work = (left ^ right) & 0x33333333;
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left ^= work;
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right = rotrFixed(right^work, 6U);
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work = (left ^ right) & 0x00ff00ff;
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left ^= work;
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right = rotlFixed(right^work, 9U);
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work = (left ^ right) & 0xaaaaaaaa;
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left = rotlFixed(left^work, 1U);
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right ^= work;
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}
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inline void FPerm(TUint32& left, TUint32& right)
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{
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TUint32 work;
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right = rotrFixed(right, 1U);
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work = (left ^ right) & 0xaaaaaaaa;
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right ^= work;
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left = rotrFixed(left^work, 9U);
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work = (left ^ right) & 0x00ff00ff;
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right ^= work;
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left = rotlFixed(left^work, 6U);
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work = (left ^ right) & 0x33333333;
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right ^= work;
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left = rotlFixed(left^work, 18U);
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work = (left ^ right) & 0xffff0000;
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right ^= work;
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left = rotlFixed(left^work, 20U);
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work = (left ^ right) & 0xf0f0f0f0;
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right ^= work;
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left = rotrFixed(left^work, 4U);
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}
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inline void ReverseKeySchedule(TUint32* aKey)
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{
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TInt i = 0;
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for (; i<16; i+=2)
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{
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TClassSwap((*(aKey+i)), (*(aKey+(32-2-i))));
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TClassSwap((*(aKey+i+1)), (*(aKey+(32-1-i))));
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}
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}
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#endif //__DES_INL__
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