sl@0: /*
sl@0: * Copyright (c) 2007-2009 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: * Common implementation of SHA224 and SHA256
sl@0: * RFC 4634 (US Secure Hash Algorithms (SHA and HMAC-SHA))
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0: */
sl@0: 
sl@0: 
sl@0: #include <cryptospi/hashplugin.h>
sl@0: #include "pluginconfig.h"
sl@0: #include "sha224and256impl.h"
sl@0: 
sl@0: using namespace SoftwareCrypto;
sl@0: 
sl@0: /**
sl@0:  * SHA256 Constants
sl@0:  * 
sl@0:  * SHA-256 uses a sequence of sixty-four constant 32-bit words. 
sl@0:  * These words represent the first thirty-two bits of the fractional 
sl@0:  * parts of the cube roots of the first sixtyfour prime numbers.
sl@0:  * 
sl@0:  * FIPS 180-2 Section 4.2.2
sl@0:  */
sl@0: const TUint K[64] = 
sl@0: 	{
sl@0: 	0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,	
sl@0: 	0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
sl@0: 	0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
sl@0: 	0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
sl@0: 	0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
sl@0: 	0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
sl@0: 	0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
sl@0: 	0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
sl@0: 	0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
sl@0: 	0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
sl@0: 	0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 
sl@0: 	0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
sl@0: 	0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 
sl@0: 	0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
sl@0: 	0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
sl@0: 	0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
sl@0: 	};
sl@0: 
sl@0: /**
sl@0:  * Define the SHA SIGMA and sigma macros 
sl@0:  * 
sl@0:  * FIPS 180-2 section 4.1.2
sl@0:  */
sl@0: // Equation 4.4
sl@0: inline TUint SHA256_SIGMA0(TUint aWord)
sl@0: 	{
sl@0: 	return (SHA_ROTR<TUint>( 2,aWord) ^ SHA_ROTR<TUint>(13,aWord) ^ SHA_ROTR<TUint>(22,aWord));
sl@0: 	}
sl@0: // Equation 4.5
sl@0: inline TUint SHA256_SIGMA1(TUint aWord)
sl@0: 	{
sl@0: 	return (SHA_ROTR<TUint>( 6,aWord) ^ SHA_ROTR<TUint>(11,aWord) ^ SHA_ROTR<TUint>(25,aWord));
sl@0: 	}
sl@0: // Equation 4.6
sl@0: inline TUint SHA256_sigma0(TUint aWord)
sl@0: 	{
sl@0: 	return (SHA_ROTR<TUint>( 7,aWord) ^ SHA_ROTR<TUint>(18,aWord) ^ SHA_SHR<TUint>( 3,aWord));
sl@0: 	}
sl@0: // Equation 4.7
sl@0: inline TUint SHA256_sigma1(TUint aWord)
sl@0: 	{
sl@0: 	return (SHA_ROTR<TUint>(17,aWord) ^ SHA_ROTR<TUint>(19,aWord) ^ SHA_SHR<TUint>(10,aWord));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: // Macros
sl@0: inline TUint MakeWord(const TUint8* aData)
sl@0: 	{
sl@0: 	return (aData[0] << 24 | aData[1] << 16 | aData[2] << 8 | aData[3]);
sl@0: 	}
sl@0: 
sl@0: 	
sl@0: CSHA224And256Impl* CSHA224And256Impl::NewL()
sl@0: 	{
sl@0: 	CSHA224And256Impl* self=new (ELeave) CSHA224And256Impl();
sl@0: 	return self;						
sl@0: 	}
sl@0: 														
sl@0: CSHA224And256Impl::CSHA224And256Impl() : iHash(KSHA256HashSize)
sl@0: 	{		
sl@0: 	}
sl@0: 	
sl@0: CSHA224And256Impl::CSHA224And256Impl(const CSHA224And256Impl& aSHA256Impl)
sl@0: 				: 	iHash(aSHA256Impl.iHash),
sl@0: 					iA(aSHA256Impl.iA),
sl@0: 					iB(aSHA256Impl.iB),
sl@0: 					iC(aSHA256Impl.iC),
sl@0: 					iD(aSHA256Impl.iD),
sl@0: 					iE(aSHA256Impl.iE),
sl@0: 					iF(aSHA256Impl.iF),
sl@0: 					iG(aSHA256Impl.iG),
sl@0: 					iH(aSHA256Impl.iH),
sl@0: 					iNl(aSHA256Impl.iNl),
sl@0: 					iNh(aSHA256Impl.iNh)
sl@0: 	{
sl@0: 	Mem::Copy(iData, aSHA256Impl.iData, KSHA256BlockSize*sizeof(TUint));
sl@0: 	}
sl@0: 	
sl@0: void CSHA224And256Impl::Reset(const TAny* aValArray)
sl@0: 	{
sl@0: 	const TUint* values = static_cast<const TUint*>(aValArray);
sl@0: 	/**
sl@0: 	 * Initial Hash Value
sl@0: 	 * 
sl@0: 	 * These words were obtained by taking the first thirty-two bits 
sl@0: 	 * of the fractional parts of the square roots of the first eight
sl@0: 	 * prime numbers.
sl@0: 	 * 
sl@0: 	 * FIPS 180-2 Section 5.3.2
sl@0: 	 */
sl@0: 	iA=values[0];
sl@0: 	iB=values[1];
sl@0: 	iC=values[2];
sl@0: 	iD=values[3];
sl@0: 	iE=values[4];
sl@0: 	iF=values[5];
sl@0: 	iG=values[6];
sl@0: 	iH=values[7];
sl@0: 	iNh=0;
sl@0: 	iNl=0;
sl@0: 	}
sl@0: 
sl@0: // This assumes a big-endian architecture
sl@0: void CSHA224And256Impl::Update(const TUint8* aData,TUint aLength)
sl@0: 	{
sl@0: 	while((aLength / 4) > 0 && (iNl % 4 == 0))
sl@0: 		{
sl@0: 		iData[iNl>>2] = MakeWord(aData);
sl@0: 		iNl+=4;
sl@0: 		aData+=4;
sl@0: 		aLength-=4;
sl@0: 		if(iNl==KSHA256BlockSize) 
sl@0: 			{
sl@0: 			Block();
sl@0: 			AddLength(KSHA256BlockSize);
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	while(aLength--)
sl@0: 		{
sl@0: 		if(!(iNl&0x03))
sl@0: 			{
sl@0: 			iData[iNl >> 2] = 0;
sl@0: 			}
sl@0: 		iData[iNl >> 2] |= *aData << ((3 - iNl&0x03) << 3) ;
sl@0: 		++aData;
sl@0: 		++iNl;
sl@0: 		if(iNl==KSHA256BlockSize) 
sl@0: 			{
sl@0: 			Block();
sl@0: 			AddLength(KSHA256BlockSize);
sl@0: 			}
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: //This function will panic if the total input length is longer than 2^64 in bits
sl@0: _LIT(KPanicString, "Message length exceeds supported length");
sl@0: inline void CSHA224And256Impl::AddLength(const TUint aLength)
sl@0: 	{
sl@0: 	TUint64 temp = iNh;
sl@0: 	iNh += aLength << 3;
sl@0: 	__ASSERT_ALWAYS((temp <= iNh), User::Panic(KPanicString, KErrOverflow));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: static inline void CSHA256_16(	const TUint aA, 
sl@0: 								const TUint aB, 
sl@0: 								const TUint aC,
sl@0: 								TUint& aD, 
sl@0: 								const TUint aE, 
sl@0: 								const TUint aF,
sl@0: 								const TUint aG, 
sl@0: 								TUint& aH,
sl@0: 								TUint aTemp1,
sl@0: 								TUint aTemp2,
sl@0: 								const TUint aK,
sl@0: 								const TUint aWord)
sl@0: 	{
sl@0: 	aTemp1 = aH + SHA256_SIGMA1(aE) + SHA_Ch(aE,aF,aG) + aK + aWord;
sl@0: 	aTemp2 = SHA256_SIGMA0(aA) + SHA_Maj(aA,aB,aC);
sl@0: 	aD = aD + aTemp1;
sl@0: 	aH = aTemp1 + aTemp2;
sl@0: 	}
sl@0: 
sl@0: static inline void CSHA256_48(	const TUint aA, 
sl@0: 								const TUint aB, 
sl@0: 								const TUint aC,
sl@0: 								TUint& aD, 
sl@0: 								const TUint aE, 
sl@0: 								const TUint aF,
sl@0: 								const TUint aG, 
sl@0: 								TUint& aH,
sl@0: 								TUint aTemp1,
sl@0: 								TUint aTemp2,
sl@0: 								const TUint aK,
sl@0: 								TUint& aWord0,
sl@0: 								const TUint aWord2,
sl@0: 								const TUint aWord7,
sl@0: 								const TUint aWord15,
sl@0: 								const TUint aWord16)
sl@0: 	{
sl@0: 	aWord0 = SHA256_sigma1(aWord2) + aWord7 + SHA256_sigma0(aWord15) + aWord16;
sl@0: 	CSHA256_16(aA, aB, aC, aD, aE, aF, aG, aH, aTemp1, aTemp2, aK, aWord0);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0:  * This function actually calculates the hash.
sl@0:  * Function is defined in FIPS 180-2 section 6.2.2
sl@0:  * 
sl@0:  * This function is the expanded version of the following loop.
sl@0:  *	for(TUint i = 0; i < 64; ++i)
sl@0:  *		{
sl@0:  *		if(i >= 16)
sl@0:  *			{
sl@0:  * 			iData[i] = SHA256_sigma1(iData[i-2]) + iData[i-7] + SHA256_sigma0(iData[i-15]) + iData[i-16];
sl@0:  *			}
sl@0:  *
sl@0:  *		temp1 = tempH + SHA256_SIGMA1(tempE) + SHA_Ch(tempE,tempF,tempG) + K[i] + iData[i];
sl@0:  *		temp2 = SHA256_SIGMA0(tempA) + SHA_Maj(tempA,tempB,tempC);
sl@0:  *	    tempH = tempG;
sl@0:  *	    tempG = tempF;
sl@0:  *	    tempF = tempE;
sl@0:  *	    tempE = tempD + temp1;
sl@0:  *	    tempD = tempC;
sl@0:  *	    tempC = tempB;
sl@0:  *	    tempB = tempA;
sl@0:  *	    tempA = temp1 + temp2;		
sl@0:  *		}
sl@0:  */
sl@0: void CSHA224And256Impl::Block()
sl@0: 	{
sl@0: 	TUint tempA=iA;
sl@0: 	TUint tempB=iB;
sl@0: 	TUint tempC=iC;
sl@0: 	TUint tempD=iD;
sl@0: 	TUint tempE=iE;
sl@0: 	TUint tempF=iF;
sl@0: 	TUint tempG=iG;
sl@0: 	TUint tempH=iH;
sl@0: 	TUint temp1=0;
sl@0: 	TUint temp2=0;
sl@0: 	
sl@0: 	CSHA256_16(tempA,tempB,tempC,tempD,tempE,tempF,tempG,tempH,temp1,temp2,K[0],iData[0]);
sl@0: 	CSHA256_16(tempH,tempA,tempB,tempC,tempD,tempE,tempF,tempG,temp1,temp2,K[1],iData[1]);
sl@0: 	CSHA256_16(tempG,tempH,tempA,tempB,tempC,tempD,tempE,tempF,temp1,temp2,K[2],iData[2]);
sl@0: 	CSHA256_16(tempF,tempG,tempH,tempA,tempB,tempC,tempD,tempE,temp1,temp2,K[3],iData[3]);
sl@0: 	CSHA256_16(tempE,tempF,tempG,tempH,tempA,tempB,tempC,tempD,temp1,temp2,K[4],iData[4]);
sl@0: 	CSHA256_16(tempD,tempE,tempF,tempG,tempH,tempA,tempB,tempC,temp1,temp2,K[5],iData[5]);
sl@0: 	CSHA256_16(tempC,tempD,tempE,tempF,tempG,tempH,tempA,tempB,temp1,temp2,K[6],iData[6]);
sl@0: 	CSHA256_16(tempB,tempC,tempD,tempE,tempF,tempG,tempH,tempA,temp1,temp2,K[7],iData[7]);
sl@0: 
sl@0: 	CSHA256_16(tempA,tempB,tempC,tempD,tempE,tempF,tempG,tempH,temp1,temp2,K[8],iData[8]);
sl@0: 	CSHA256_16(tempH,tempA,tempB,tempC,tempD,tempE,tempF,tempG,temp1,temp2,K[9],iData[9]);
sl@0: 	CSHA256_16(tempG,tempH,tempA,tempB,tempC,tempD,tempE,tempF,temp1,temp2,K[10],iData[10]);
sl@0: 	CSHA256_16(tempF,tempG,tempH,tempA,tempB,tempC,tempD,tempE,temp1,temp2,K[11],iData[11]);
sl@0: 	CSHA256_16(tempE,tempF,tempG,tempH,tempA,tempB,tempC,tempD,temp1,temp2,K[12],iData[12]);
sl@0: 	CSHA256_16(tempD,tempE,tempF,tempG,tempH,tempA,tempB,tempC,temp1,temp2,K[13],iData[13]);
sl@0: 	CSHA256_16(tempC,tempD,tempE,tempF,tempG,tempH,tempA,tempB,temp1,temp2,K[14],iData[14]);
sl@0: 	CSHA256_16(tempB,tempC,tempD,tempE,tempF,tempG,tempH,tempA,temp1,temp2,K[15],iData[15]);
sl@0: 
sl@0: 	CSHA256_48(	tempA, tempB, tempC, tempD, tempE, tempF, tempG, tempH, temp1, temp2,
sl@0: 				K[16], iData[16], iData[14], iData[9], iData[1], iData[0]);
sl@0: 	CSHA256_48(	tempH, tempA, tempB, tempC, tempD, tempE, tempF, tempG, temp1, temp2,
sl@0: 				K[17], iData[17], iData[15], iData[10], iData[2], iData[1]);
sl@0: 	CSHA256_48(	tempG, tempH, tempA, tempB, tempC, tempD, tempE, tempF, temp1, temp2,
sl@0: 				K[18], iData[18], iData[16], iData[11], iData[3], iData[2]);
sl@0: 	CSHA256_48(	tempF, tempG, tempH, tempA, tempB, tempC, tempD, tempE, temp1, temp2,
sl@0: 				K[19], iData[19], iData[17], iData[12], iData[4], iData[3]);
sl@0: 	CSHA256_48(	tempE, tempF, tempG, tempH, tempA, tempB, tempC, tempD, temp1, temp2,
sl@0: 				K[20], iData[20], iData[18], iData[13], iData[5], iData[4]);
sl@0: 	CSHA256_48(	tempD, tempE, tempF, tempG, tempH, tempA, tempB, tempC, temp1, temp2,
sl@0: 				K[21], iData[21], iData[19], iData[14], iData[6], iData[5]);
sl@0: 	CSHA256_48(	tempC, tempD, tempE, tempF, tempG, tempH, tempA, tempB, temp1, temp2,
sl@0: 				K[22], iData[22], iData[20], iData[15], iData[7], iData[6]);
sl@0: 	CSHA256_48(	tempB, tempC, tempD, tempE, tempF, tempG, tempH, tempA, temp1, temp2,
sl@0: 				K[23], iData[23], iData[21], iData[16], iData[8], iData[7]);
sl@0: 
sl@0: 	CSHA256_48(	tempA, tempB, tempC, tempD, tempE, tempF, tempG, tempH, temp1, temp2,
sl@0: 				K[24], iData[24], iData[22], iData[17], iData[9], iData[8]);
sl@0: 	CSHA256_48(	tempH, tempA, tempB, tempC, tempD, tempE, tempF, tempG, temp1, temp2,
sl@0: 				K[25], iData[25], iData[23], iData[18], iData[10], iData[9]);
sl@0: 	CSHA256_48(	tempG, tempH, tempA, tempB, tempC, tempD, tempE, tempF, temp1, temp2,
sl@0: 				K[26], iData[26], iData[24], iData[19], iData[11], iData[10]);
sl@0: 	CSHA256_48(	tempF, tempG, tempH, tempA, tempB, tempC, tempD, tempE, temp1, temp2,
sl@0: 				K[27], iData[27], iData[25], iData[20], iData[12], iData[11]);
sl@0: 	CSHA256_48(	tempE, tempF, tempG, tempH, tempA, tempB, tempC, tempD, temp1, temp2,
sl@0: 				K[28], iData[28], iData[26], iData[21], iData[13], iData[12]);
sl@0: 	CSHA256_48(	tempD, tempE, tempF, tempG, tempH, tempA, tempB, tempC, temp1, temp2,
sl@0: 				K[29], iData[29], iData[27], iData[22], iData[14], iData[13]);
sl@0: 	CSHA256_48(	tempC, tempD, tempE, tempF, tempG, tempH, tempA, tempB, temp1, temp2,
sl@0: 				K[30], iData[30], iData[28], iData[23], iData[15], iData[14]);
sl@0: 	CSHA256_48(	tempB, tempC, tempD, tempE, tempF, tempG, tempH, tempA, temp1, temp2,
sl@0: 				K[31], iData[31], iData[29], iData[24], iData[16], iData[15]);
sl@0: 
sl@0: 	CSHA256_48(	tempA, tempB, tempC, tempD, tempE, tempF, tempG, tempH, temp1, temp2,
sl@0: 				K[32], iData[32], iData[30], iData[25], iData[17], iData[16]);
sl@0: 	CSHA256_48(	tempH, tempA, tempB, tempC, tempD, tempE, tempF, tempG, temp1, temp2,
sl@0: 				K[33], iData[33], iData[31], iData[26], iData[18], iData[17]);
sl@0: 	CSHA256_48(	tempG, tempH, tempA, tempB, tempC, tempD, tempE, tempF, temp1, temp2,
sl@0: 				K[34], iData[34], iData[32], iData[27], iData[19], iData[18]);
sl@0: 	CSHA256_48(	tempF, tempG, tempH, tempA, tempB, tempC, tempD, tempE, temp1, temp2,
sl@0: 				K[35], iData[35], iData[33], iData[28], iData[20], iData[19]);
sl@0: 	CSHA256_48(	tempE, tempF, tempG, tempH, tempA, tempB, tempC, tempD, temp1, temp2,
sl@0: 				K[36], iData[36], iData[34], iData[29], iData[21], iData[20]);
sl@0: 	CSHA256_48(	tempD, tempE, tempF, tempG, tempH, tempA, tempB, tempC, temp1, temp2,
sl@0: 				K[37], iData[37], iData[35], iData[30], iData[22], iData[21]);
sl@0: 	CSHA256_48(	tempC, tempD, tempE, tempF, tempG, tempH, tempA, tempB, temp1, temp2,
sl@0: 				K[38], iData[38], iData[36], iData[31], iData[23], iData[22]);
sl@0: 	CSHA256_48(	tempB, tempC, tempD, tempE, tempF, tempG, tempH, tempA, temp1, temp2,
sl@0: 				K[39], iData[39], iData[37], iData[32], iData[24], iData[23]);
sl@0: 
sl@0: 	CSHA256_48(	tempA, tempB, tempC, tempD, tempE, tempF, tempG, tempH, temp1, temp2,
sl@0: 				K[40], iData[40], iData[38], iData[33], iData[25], iData[24]);
sl@0: 	CSHA256_48(	tempH, tempA, tempB, tempC, tempD, tempE, tempF, tempG, temp1, temp2,
sl@0: 				K[41], iData[41], iData[39], iData[34], iData[26], iData[25]);
sl@0: 	CSHA256_48(	tempG, tempH, tempA, tempB, tempC, tempD, tempE, tempF, temp1, temp2,
sl@0: 				K[42], iData[42], iData[40], iData[35], iData[27], iData[26]);
sl@0: 	CSHA256_48(	tempF, tempG, tempH, tempA, tempB, tempC, tempD, tempE, temp1, temp2,
sl@0: 				K[43], iData[43], iData[41], iData[36], iData[28], iData[27]);
sl@0: 	CSHA256_48(	tempE, tempF, tempG, tempH, tempA, tempB, tempC, tempD, temp1, temp2,
sl@0: 				K[44], iData[44], iData[42], iData[37], iData[29], iData[28]);
sl@0: 	CSHA256_48(	tempD, tempE, tempF, tempG, tempH, tempA, tempB, tempC, temp1, temp2,
sl@0: 				K[45], iData[45], iData[43], iData[38], iData[30], iData[29]);
sl@0: 	CSHA256_48(	tempC, tempD, tempE, tempF, tempG, tempH, tempA, tempB, temp1, temp2,
sl@0: 				K[46], iData[46], iData[44], iData[39], iData[31], iData[30]);
sl@0: 	CSHA256_48(	tempB, tempC, tempD, tempE, tempF, tempG, tempH, tempA, temp1, temp2,
sl@0: 				K[47], iData[47], iData[45], iData[40], iData[32], iData[31]);
sl@0: 
sl@0: 	CSHA256_48(	tempA, tempB, tempC, tempD, tempE, tempF, tempG, tempH, temp1, temp2,
sl@0: 				K[48], iData[48], iData[46], iData[41], iData[33], iData[32]);
sl@0: 	CSHA256_48(	tempH, tempA, tempB, tempC, tempD, tempE, tempF, tempG, temp1, temp2,
sl@0: 				K[49], iData[49], iData[47], iData[42], iData[34], iData[33]);
sl@0: 	CSHA256_48(	tempG, tempH, tempA, tempB, tempC, tempD, tempE, tempF, temp1, temp2,
sl@0: 				K[50], iData[50], iData[48], iData[43], iData[35], iData[34]);
sl@0: 	CSHA256_48(	tempF, tempG, tempH, tempA, tempB, tempC, tempD, tempE, temp1, temp2,
sl@0: 				K[51], iData[51], iData[49], iData[44], iData[36], iData[35]);
sl@0: 	CSHA256_48(	tempE, tempF, tempG, tempH, tempA, tempB, tempC, tempD, temp1, temp2,
sl@0: 				K[52], iData[52], iData[50], iData[45], iData[37], iData[36]);
sl@0: 	CSHA256_48(	tempD, tempE, tempF, tempG, tempH, tempA, tempB, tempC, temp1, temp2,
sl@0: 				K[53], iData[53], iData[51], iData[46], iData[38], iData[37]);
sl@0: 	CSHA256_48(	tempC, tempD, tempE, tempF, tempG, tempH, tempA, tempB, temp1, temp2,
sl@0: 				K[54], iData[54], iData[52], iData[47], iData[39], iData[38]);
sl@0: 	CSHA256_48(	tempB, tempC, tempD, tempE, tempF, tempG, tempH, tempA, temp1, temp2,
sl@0: 				K[55], iData[55], iData[53], iData[48], iData[40], iData[39]);
sl@0: 
sl@0: 	CSHA256_48(	tempA, tempB, tempC, tempD, tempE, tempF, tempG, tempH, temp1, temp2,
sl@0: 				K[56], iData[56], iData[54], iData[49], iData[41], iData[40]);
sl@0: 	CSHA256_48(	tempH, tempA, tempB, tempC, tempD, tempE, tempF, tempG, temp1, temp2,
sl@0: 				K[57], iData[57], iData[55], iData[50], iData[42], iData[41]);
sl@0: 	CSHA256_48(	tempG, tempH, tempA, tempB, tempC, tempD, tempE, tempF, temp1, temp2,
sl@0: 				K[58], iData[58], iData[56], iData[51], iData[43], iData[42]);
sl@0: 	CSHA256_48(	tempF, tempG, tempH, tempA, tempB, tempC, tempD, tempE, temp1, temp2,
sl@0: 				K[59], iData[59], iData[57], iData[52], iData[44], iData[43]);
sl@0: 	CSHA256_48(	tempE, tempF, tempG, tempH, tempA, tempB, tempC, tempD, temp1, temp2,
sl@0: 				K[60], iData[60], iData[58], iData[53], iData[45], iData[44]);
sl@0: 	CSHA256_48(	tempD, tempE, tempF, tempG, tempH, tempA, tempB, tempC, temp1, temp2,
sl@0: 				K[61], iData[61], iData[59], iData[54], iData[46], iData[45]);
sl@0: 	CSHA256_48(	tempC, tempD, tempE, tempF, tempG, tempH, tempA, tempB, temp1, temp2,
sl@0: 				K[62], iData[62], iData[60], iData[55], iData[47], iData[46]);
sl@0: 	CSHA256_48(	tempB, tempC, tempD, tempE, tempF, tempG, tempH, tempA, temp1, temp2,
sl@0: 				K[63], iData[63], iData[61], iData[56], iData[48], iData[47]);
sl@0: 
sl@0: 	iA+=tempA;
sl@0: 	iB+=tempB;
sl@0: 	iC+=tempC;
sl@0: 	iD+=tempD;
sl@0: 	iE+=tempE;
sl@0: 	iF+=tempF;
sl@0: 	iG+=tempG;
sl@0: 	iH+=tempH;
sl@0: 
sl@0: 	iNl=0;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0:  * According to the standard, the message must be padded to an
sl@0:  * even 512 bits. The first padding bit must be a '1'. The last
sl@0:  * 64 bits represent the length of the original message. All bits 
sl@0:  * in between should be 0. This helper function will pad the 
sl@0:  * message according to those rules by filling the iData array 
sl@0:  * accordingly. 
sl@0:  */ 
sl@0: void CSHA224And256Impl::PadMessage()
sl@0: 	{
sl@0: 	const TUint padByte = 0x80;
sl@0: 	
sl@0: 	if(!(iNl&0x03))
sl@0: 		{
sl@0: 		iData[iNl >> 2] = 0;
sl@0: 		}
sl@0: 	iData[iNl >> 2] |= padByte << ((3 - iNl&0x03) << 3) ;
sl@0: 
sl@0: 	if (iNl >= (KSHA256BlockSize - 2*sizeof(TUint))) 
sl@0: 		{
sl@0: 		if (iNl < (KSHA256BlockSize - sizeof(TUint)))
sl@0: 			iData[(KSHA256BlockSize >> 2) - 1]=0;		
sl@0: 		Block();
sl@0: 		Mem::FillZ(iData, KSHA256BlockSize);
sl@0: 		} 
sl@0: 	else
sl@0: 		{
sl@0: 		const TUint offset=(iNl+4)>>2; //+4 to account for the word added in the
sl@0: 		//switch statement above
sl@0: 		Mem::FillZ(iData+offset,(KSHA256BlockSize - offset*sizeof(TUint)));
sl@0: 		}
sl@0: 
sl@0: 	//Length in bits
sl@0: 	TUint64 msgLength = iNh;
sl@0: 
sl@0: 	iData[(KSHA256BlockSize >> 2) - 2] = (msgLength) >> 32;
sl@0: 	iData[(KSHA256BlockSize >> 2) - 1] = (msgLength & 0xFFFFFFFF);	
sl@0: 	}
sl@0: 
sl@0: inline void CSHA224And256Impl::CopyWordToHash(TUint aVal, TUint aIndex)
sl@0: 	{
sl@0: 	TUint value = MakeWord(reinterpret_cast<TUint8*>(&aVal));
sl@0: 	Mem::Copy(const_cast<TUint8*>(iHash.Ptr())+ (4*aIndex), &value, sizeof(aVal));
sl@0: 	}
sl@0: 
sl@0: const TDes8& CSHA224And256Impl::Final()
sl@0: 	{
sl@0: 	AddLength(iNl);
sl@0: 	PadMessage();
sl@0: 	Block();
sl@0: 	//
sl@0: 	// Generate hash value into iHash
sl@0: 	//
sl@0: 	CopyWordToHash(iA, 0);
sl@0: 	CopyWordToHash(iB, 1);
sl@0: 	CopyWordToHash(iC, 2);
sl@0: 	CopyWordToHash(iD, 3);
sl@0: 	CopyWordToHash(iE, 4);
sl@0: 	CopyWordToHash(iF, 5);
sl@0: 	CopyWordToHash(iG, 6);
sl@0: 	CopyWordToHash(iH, 7);
sl@0: 	
sl@0: 	return iHash;
sl@0: 	}
sl@0: 
sl@0: void CSHA224And256Impl::RestoreState()
sl@0: 	{
sl@0: 	iA = iACopy;
sl@0: 	iB = iBCopy;
sl@0: 	iC = iCCopy;
sl@0: 	iD = iDCopy;
sl@0: 	iE = iECopy;
sl@0: 	iF = iFCopy;
sl@0: 	iG = iGCopy;
sl@0: 	iH = iHCopy;
sl@0: 	iNl = iNlCopy;
sl@0: 	iNh = iNhCopy;	
sl@0: 	Mem::Copy(iData, iDataCopy, KSHA256BlockSize*sizeof(TUint)); 
sl@0: 	}
sl@0: 
sl@0: void CSHA224And256Impl::StoreState()
sl@0: 	{
sl@0: 	iACopy = iA;
sl@0: 	iBCopy = iB;
sl@0: 	iCCopy = iC;
sl@0: 	iDCopy = iD;
sl@0: 	iECopy = iE;
sl@0: 	iFCopy = iF;
sl@0: 	iGCopy = iG;
sl@0: 	iHCopy = iH;
sl@0: 	iNlCopy = iNl;
sl@0: 	iNhCopy = iNh;	
sl@0: 	Mem::Copy(iDataCopy, iData, KSHA256BlockSize*sizeof(TUint));
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: