sl@0: /*
sl@0: * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * software md2 implementation
sl@0: * software md2 implementation
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0: */
sl@0: 
sl@0: #include "md2impl.h"
sl@0: 
sl@0: #include <cryptospi/hashplugin.h>
sl@0: #include "pluginconfig.h"
sl@0: 
sl@0: using namespace SoftwareCrypto;
sl@0: 	
sl@0: CMD2Impl* CMD2Impl::NewL()
sl@0: 	{
sl@0: 	CMD2Impl* self=new (ELeave) CMD2Impl();
sl@0: 	return self;						
sl@0: 	}
sl@0: 														
sl@0: CMD2Impl* CMD2Impl::NewLC()
sl@0: 	{
sl@0: 	CMD2Impl* self=NewL();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	return self;						
sl@0: 	}
sl@0: 														
sl@0: CMD2Impl::CMD2Impl() : iHash(KMD2HashSize)
sl@0: 	{		
sl@0: 	}
sl@0: 	
sl@0: CMD2Impl::CMD2Impl(const CMD2Impl& aCMD2Impl)
sl@0: : iHash(aCMD2Impl.iHash),iNum(aCMD2Impl.iNum)
sl@0: 	{
sl@0: 	(void)Mem::Copy(iData, aCMD2Impl.iData, sizeof(iData));
sl@0: 	(void)Mem::Copy(iChecksum, aCMD2Impl.iChecksum, sizeof(iChecksum));
sl@0: 	(void)Mem::Copy(iState, aCMD2Impl.iState, sizeof(iState));		
sl@0: 	}
sl@0: 		
sl@0: CMD2Impl::~CMD2Impl()
sl@0: 	{	
sl@0: 	}
sl@0: 	
sl@0: void CMD2Impl::Reset()
sl@0: 	{
sl@0: 	Mem::FillZ(iData,sizeof(iData));
sl@0: 	Mem::FillZ(iChecksum,sizeof(iChecksum));
sl@0: 	Mem::FillZ(iState,sizeof(iState));
sl@0: 	iNum=0;		
sl@0: 	}
sl@0: 	
sl@0: void CMD2Impl::Close()
sl@0: 	{
sl@0: 	delete this;	
sl@0: 	}
sl@0: 	
sl@0: void CMD2Impl::GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics)
sl@0: 	{
sl@0: 	aPluginCharacteristics=NULL;
sl@0: 	TInt hashNum=sizeof(KHashCharacteristics)/sizeof(THashCharacteristics*);
sl@0: 	for (TInt i=0;i<hashNum;i++)
sl@0: 		{
sl@0: 		if (KHashCharacteristics[i]->cmn.iImplementationUID==ImplementationUid().iUid)
sl@0: 			{
sl@0: 			aPluginCharacteristics = KHashCharacteristics[i];
sl@0: 			break;
sl@0: 			}
sl@0: 		}	
sl@0: 	}
sl@0: 	
sl@0: CExtendedCharacteristics* CMD2Impl::CreateExtendedCharacteristicsL()
sl@0: 	{
sl@0: 	// All Symbian software plug-ins have unlimited concurrency, cannot be reserved
sl@0: 	// for exclusive use and are not CERTIFIED to be standards compliant.
sl@0: 	return CExtendedCharacteristics::NewL(KMaxTInt, EFalse);
sl@0: 	}
sl@0: 
sl@0: const CExtendedCharacteristics* CMD2Impl::GetExtendedCharacteristicsL()
sl@0: 	{
sl@0: 	return CMD2Impl::CreateExtendedCharacteristicsL();
sl@0: 	}
sl@0: 
sl@0: TPtrC8 CMD2Impl::Hash(const TDesC8& aMessage)
sl@0: 	{
sl@0: 	TPtrC8 ptr(KNullDesC8());
sl@0: 	DoUpdate(aMessage.Ptr(),aMessage.Size());
sl@0: 	StoreState();	
sl@0: 	DoFinal();
sl@0: 	ptr.Set(iHash);
sl@0: 	RestoreState();	
sl@0: 	return ptr;		
sl@0: 	}		
sl@0: 	
sl@0: void CMD2Impl::Update(const TDesC8& aMessage)
sl@0: 	{
sl@0: 	DoUpdate(aMessage.Ptr(),aMessage.Size());	
sl@0: 	}
sl@0: 	
sl@0: TPtrC8 CMD2Impl::Final(const TDesC8& aMessage)
sl@0: 	{
sl@0: 	TPtrC8 ptr(KNullDesC8());
sl@0: 	if (aMessage!=KNullDesC8())
sl@0: 		{
sl@0: 		DoUpdate(aMessage.Ptr(),aMessage.Size());			
sl@0: 		}
sl@0: 	DoFinal();
sl@0: 	ptr.Set(iHash);
sl@0: 	Reset();
sl@0: 	return ptr;
sl@0: 	}
sl@0: 	
sl@0: MHash* CMD2Impl::ReplicateL()
sl@0: 	{
sl@0: 	return NewL();	
sl@0: 	}
sl@0: 	
sl@0: MHash* CMD2Impl::CopyL()
sl@0: 	{
sl@0: 	return new(ELeave) CMD2Impl(*this);	
sl@0: 	}
sl@0: 
sl@0: void CMD2Impl::RestoreState()
sl@0: 	{
sl@0: 	Mem::Copy(&iData[0], &iDataTemp[0], KMD2BlockSize);
sl@0: 	Mem::Copy(&iChecksum[0], &iChecksumTemp[0], KMD2BlockSize*sizeof(TUint));
sl@0: 	Mem::Copy(&iState[0], &iStateTemp[0], KMD2BlockSize*sizeof(TUint));		
sl@0: 	}
sl@0: 	
sl@0: void CMD2Impl::StoreState()
sl@0: 	{
sl@0: 	Mem::Copy(&iDataTemp[0], &iData[0], KMD2BlockSize);
sl@0: 	Mem::Copy(&iChecksumTemp[0], &iChecksum[0], KMD2BlockSize*sizeof(TUint));
sl@0: 	Mem::Copy(&iStateTemp[0], &iState[0], KMD2BlockSize*sizeof(TUint));		
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TUid CMD2Impl::ImplementationUid()
sl@0: 	{
sl@0: 	return KCryptoPluginMd2Uid;
sl@0: 	}
sl@0: 
sl@0: static inline TUint CMD2_S(TUint& elt,TUint8 val)
sl@0: 	{
sl@0: 	return elt^=val;
sl@0: 	}
sl@0: 
sl@0: void CMD2Impl::DoUpdate(const TUint8* aData,TUint aLength)
sl@0: 	{
sl@0: 	TBool carryOn=ETrue;
sl@0: 	if (iNum)
sl@0: 		{
sl@0: 		if (iNum+aLength>=(TUint)KMD2BlockSize)
sl@0: 			{
sl@0: 			const TUint temp=KMD2BlockSize-iNum;
sl@0: 			(void)Mem::Copy(iData+iNum,aData,temp);
sl@0: 			Block(iData);
sl@0: 			aData+=temp;
sl@0: 			aLength-=temp;
sl@0: 			iNum=0;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			(void)Mem::Copy(iData+iNum,aData,aLength);
sl@0: 			iNum+=aLength;
sl@0: 			carryOn=EFalse;
sl@0: 			}
sl@0: 		}
sl@0: 	// processing by block of KMD2BlockSize
sl@0: 	if (carryOn)
sl@0: 		{
sl@0: 		while (aLength>=(TUint)KMD2BlockSize)
sl@0: 			{
sl@0: 			Block(aData);
sl@0: 			aData+=KMD2BlockSize;
sl@0: 			aLength-=KMD2BlockSize;
sl@0: 			}
sl@0: 		(void)Mem::Copy(iData,aData,aLength);
sl@0: 		iNum=aLength;
sl@0: 		}		
sl@0: 	}
sl@0: 	
sl@0: void CMD2Impl::DoFinal()
sl@0: 	{
sl@0: 	const TUint pad=KMD2BlockSize-iNum;
sl@0: 	if (pad>0)
sl@0: 		Mem::Fill(iData+iNum,(TUint8)pad,pad);
sl@0: 	Block(iData);
sl@0: 
sl@0: 	TUint8* pData=iData;
sl@0: 	const TUint8* pEnd=iData+KMD2BlockSize;
sl@0: 	const TUint* pChecksum=iChecksum;
sl@0: 	while (pData<pEnd)
sl@0: 		{
sl@0: 		*pData=(TUint8)*pChecksum;//checksum is always less than 255 
sl@0: 		pData++;
sl@0: 		pChecksum++;
sl@0: 		}
sl@0: 	Block(iData);
sl@0: 
sl@0: 	TUint* pState=iState;
sl@0: 	for (TUint i=0;i<(TUint)KMD2BlockSize;i++,pState++) //safe: iState and iHash have got same size
sl@0: 		iHash[i]=(TUint8)(*pState&0xff);		
sl@0: 	}
sl@0: 	
sl@0: void CMD2Impl::Block(const TUint8* aData)
sl@0: 	{
sl@0: 	static const TUint8 S[256]={
sl@0: 		0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01,
sl@0: 		0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
sl@0: 		0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C,
sl@0: 		0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
sl@0: 		0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
sl@0: 		0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
sl@0: 		0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49,
sl@0: 		0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
sl@0: 		0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F,
sl@0: 		0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
sl@0: 		0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27,
sl@0: 		0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
sl@0: 		0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1,
sl@0: 		0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
sl@0: 		0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
sl@0: 		0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
sl@0: 		0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20,
sl@0: 		0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
sl@0: 		0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6,
sl@0: 		0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
sl@0: 		0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A,
sl@0: 		0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
sl@0: 		0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09,
sl@0: 		0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
sl@0: 		0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
sl@0: 		0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
sl@0: 		0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D,
sl@0: 		0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
sl@0: 		0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4,
sl@0: 		0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
sl@0: 		0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A,
sl@0: 		0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14,
sl@0: 		};
sl@0: 	TUint state[KMD2BlockSize*3];
sl@0: 	TUint j=iChecksum[KMD2BlockSize-1];
sl@0: 	TUint i=0,temp=0;
sl@0: 	while (i<(TUint)KMD2BlockSize)
sl@0: 		{
sl@0: 		const TUint tempState=iState[i];
sl@0: 		temp=aData[i];
sl@0: 		state[i]=tempState;
sl@0: 		state[i+16]=temp;
sl@0: 		state[i+32]=temp^tempState;
sl@0: 		j=CMD2_S(iChecksum[i++],S[temp^j]);
sl@0: 		}
sl@0: 	temp=0;
sl@0: 	TUint* pstate=state;
sl@0: 	const TUint *pend=state+(KMD2BlockSize*3);
sl@0: 	for (i=0; i<18; i++)
sl@0: 		{
sl@0: 		while (pstate<pend)
sl@0: 			{
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			temp=CMD2_S(*pstate,S[temp]);pstate++;
sl@0: 			}
sl@0: 		pstate=state;
sl@0: 		temp=(temp+i)&0xff;
sl@0: 		}
sl@0: 	(void)Mem::Copy(iState,state,KMD2BlockSize*sizeof(TUint));		
sl@0: 	}
sl@0: 
sl@0: 
sl@0: // Implemented in hmacimpl.cpp or softwarehashbase.cpp
sl@0: // but required as derived from MHash. No coverage here.
sl@0: #ifdef _BullseyeCoverage
sl@0: #pragma suppress_warnings on
sl@0: #pragma BullseyeCoverage off
sl@0: #pragma suppress_warnings off
sl@0: #endif
sl@0: 
sl@0: TAny* CMD2Impl::GetExtension(TUid /*aExtensionId*/)
sl@0: 	{
sl@0: 	return NULL;	
sl@0: 	}
sl@0: 
sl@0: void CMD2Impl::SetOperationModeL(TUid /*aOperationMode*/)
sl@0: 	{
sl@0: 	User::Leave(KErrNotSupported);
sl@0: 	}
sl@0: 
sl@0: void CMD2Impl::SetKeyL(const CKey& /*aKey*/)
sl@0: 	{
sl@0: 	User::Leave(KErrNotSupported);
sl@0: 	}
sl@0: