// tiger.cpp - written and placed in the public domain by Wei Dai#include "pch.h"#include "tiger.h"#include "misc.h"#ifdef WORD64_AVAILABLENAMESPACE_BEGIN(CryptoPP)void Tiger::Init(){	m_digest[0] = W64LIT(0x0123456789ABCDEF);	m_digest[1] = W64LIT(0xFEDCBA9876543210);	m_digest[2] = W64LIT(0xF096A5B4C3B2E187);}void Tiger::TruncatedFinal(byte *hash, unsigned int size){	ThrowIfInvalidTruncatedSize(size);	PadLastBlock(56, 0x01);	CorrectEndianess(m_data, m_data, 56);	m_data[7] = GetBitCountLo();	Transform(m_digest, m_data);	CorrectEndianess(m_digest, m_digest, DigestSize());	memcpy(hash, m_digest, size);	Restart();		// reinit for next use}#define t1 (table)#define t2 (table+256)#define t3 (table+256*2)#define t4 (table+256*3)#define round(a,b,c,x,mul) \	c ^= x; \	a -= t1[GETBYTE(c,0)] ^ t2[GETBYTE(c,2)] ^ t3[GETBYTE(c,4)] ^ t4[GETBYTE(c,6)]; \	b += t4[GETBYTE(c,1)] ^ t3[GETBYTE(c,3)] ^ t2[GETBYTE(c,5)] ^ t1[GETBYTE(c,7)]; \	b *= mul#define pass(a,b,c,mul,X) \	round(a,b,c,X[0],mul); \	round(b,c,a,X[1],mul); \	round(c,a,b,X[2],mul); \	round(a,b,c,X[3],mul); \	round(b,c,a,X[4],mul); \	round(c,a,b,X[5],mul); \	round(a,b,c,X[6],mul); \	round(b,c,a,X[7],mul)#define key_schedule(Y,X) \	Y[0] = X[0] - (X[7]^W64LIT(0xA5A5A5A5A5A5A5A5)); \	Y[1] = X[1] ^ Y[0]; \	Y[2] = X[2] + Y[1]; \	Y[3] = X[3] - (Y[2] ^ ((~Y[1])<<19)); \	Y[4] = X[4] ^ Y[3]; \	Y[5] = X[5] + Y[4]; \	Y[6] = X[6] - (Y[5] ^ ((~Y[4])>>23)); \	Y[7] = X[7] ^ Y[6]; \	Y[0] += Y[7]; \	Y[1] -= Y[0] ^ ((~Y[7])<<19); \	Y[2] ^= Y[1]; \	Y[3] += Y[2]; \	Y[4] -= Y[3] ^ ((~Y[2])>>23); \	Y[5] ^= Y[4]; \	Y[6] += Y[5]; \	Y[7] -= Y[6] ^ W64LIT(0x0123456789ABCDEF)void Tiger::Transform (word64 *digest, const word64 *X){	word64 a = digest[0];	word64 b = digest[1];	word64 c = digest[2];	word64 Y[8];	pass(a,b,c,5,X);	key_schedule(Y,X);	pass(c,a,b,7,Y);	key_schedule(Y,Y);	pass(b,c,a,9,Y);	digest[0] = a ^ digest[0];	digest[1] = b - digest[1];	digest[2] = c + digest[2];	Y[0] = Y[1] = Y[2] = Y[3] = Y[4] = Y[5] = Y[6] = Y[7] = 0;}NAMESPACE_END#endif	// WORD64_AVAILABLE