diamond.cpp

加密函数库:包括多种加密解密算法,数字签名,散列算法

	y[2] = (x[2] & 1) | (x[3] & 2) | (x[4] & 4) |
			(x[5] & 8) | (x[6] & 16) | (x[7] & 32) |
			(x[8] & 64) | (x[9] & 128);
	y[3] = (x[3] & 1) | (x[4] & 2) | (x[5] & 4) |
			(x[6] & 8) | (x[7] & 16) | (x[8] & 32) |
			(x[9] & 64) | (x[10] & 128);
	y[4] = (x[4] & 1) | (x[5] & 2) | (x[6] & 4) |
			(x[7] & 8) | (x[8] & 16) | (x[9] & 32) |
			(x[10] & 64) | (x[11] & 128);
	y[5] = (x[5] & 1) | (x[6] & 2) | (x[7] & 4) |
			(x[8] & 8) | (x[9] & 16) | (x[10] & 32) |
			(x[11] & 64) | (x[12] & 128);
	y[6] = (x[6] & 1) | (x[7] & 2) | (x[8] & 4) |
			(x[9] & 8) | (x[10] & 16) | (x[11] & 32) |
			(x[12] & 64) | (x[13] & 128);
	y[7] = (x[7] & 1) | (x[8] & 2) | (x[9] & 4) |
			(x[10] & 8) | (x[11] & 16) | (x[12] & 32) |
			(x[13] & 64) | (x[14] & 128);
	y[8] = (x[8] & 1) | (x[9] & 2) | (x[10] & 4) |
			(x[11] & 8) | (x[12] & 16) | (x[13] & 32) |
			(x[14] & 64) | (x[15] & 128);
	y[9] = (x[9] & 1) | (x[10] & 2) | (x[11] & 4) |
			(x[12] & 8) | (x[13] & 16) | (x[14] & 32) |
			(x[15] & 64) | (x[0] & 128);
	y[10] = (x[10] & 1) | (x[11] & 2) | (x[12] & 4) |
			(x[13] & 8) | (x[14] & 16) | (x[15] & 32) |
			(x[0] & 64) | (x[1] & 128);
	y[11] = (x[11] & 1) | (x[12] & 2) | (x[13] & 4) |
			(x[14] & 8) | (x[15] & 16) | (x[0] & 32) |
			(x[1] & 64) | (x[2] & 128);
	y[12] = (x[12] & 1) | (x[13] & 2) | (x[14] & 4) |
			(x[15] & 8) | (x[0] & 16) | (x[1] & 32) |
			(x[2] & 64) | (x[3] & 128);
	y[13] = (x[13] & 1) | (x[14] & 2) | (x[15] & 4) |
			(x[0] & 8) | (x[1] & 16) | (x[2] & 32) |
			(x[3] & 64) | (x[4] & 128);
	y[14] = (x[14] & 1) | (x[15] & 2) | (x[0] & 4) |
			(x[1] & 8) | (x[2] & 16) | (x[3] & 32) |
			(x[4] & 64) | (x[5] & 128);
	y[15] = (x[15] & 1) | (x[0] & 2) | (x[1] & 4) |
			(x[2] & 8) | (x[3] & 16) | (x[4] & 32) |
			(x[5] & 64) | (x[6] & 128);

	memcpy(x, y, 16);
}

inline void Diamond2::Base::ipermute(byte *x)
{
	byte y[16];

	y[0] = (x[0] & 1) | (x[15] & 2) | (x[14] & 4) |
			(x[13] & 8) | (x[12] & 16) | (x[11] & 32) |
			(x[10] & 64) | (x[9] & 128);
	y[1] = (x[1] & 1) | (x[0] & 2) | (x[15] & 4) |
			(x[14] & 8) | (x[13] & 16) | (x[12] & 32) |
			(x[11] & 64) | (x[10] & 128);
	y[2] = (x[2] & 1) | (x[1] & 2) | (x[0] & 4) |
			(x[15] & 8) | (x[14] & 16) | (x[13] & 32) |
			(x[12] & 64) | (x[11] & 128);
	y[3] = (x[3] & 1) | (x[2] & 2) | (x[1] & 4) |
			(x[0] & 8) | (x[15] & 16) | (x[14] & 32) |
			(x[13] & 64) | (x[12] & 128);
	y[4] = (x[4] & 1) | (x[3] & 2) | (x[2] & 4) |
			(x[1] & 8) | (x[0] & 16) | (x[15] & 32) |
			(x[14] & 64) | (x[13] & 128);
	y[5] = (x[5] & 1) | (x[4] & 2) | (x[3] & 4) |
			(x[2] & 8) | (x[1] & 16) | (x[0] & 32) |
			(x[15] & 64) | (x[14] & 128);
	y[6] = (x[6] & 1) | (x[5] & 2) | (x[4] & 4) |
			(x[3] & 8) | (x[2] & 16) | (x[1] & 32) |
			(x[0] & 64) | (x[15] & 128);
	y[7] = (x[7] & 1) | (x[6] & 2) | (x[5] & 4) |
			(x[4] & 8) | (x[3] & 16) | (x[2] & 32) |
			(x[1] & 64) | (x[0] & 128);
	y[8] = (x[8] & 1) | (x[7] & 2) | (x[6] & 4) |
			(x[5] & 8) | (x[4] & 16) | (x[3] & 32) |
			(x[2] & 64) | (x[1] & 128);
	y[9] = (x[9] & 1) | (x[8] & 2) | (x[7] & 4) |
			(x[6] & 8) | (x[5] & 16) | (x[4] & 32) |
			(x[3] & 64) | (x[2] & 128);
	y[10] = (x[10] & 1) | (x[9] & 2) | (x[8] & 4) |
			(x[7] & 8) | (x[6] & 16) | (x[5] & 32) |
			(x[4] & 64) | (x[3] & 128);
	y[11] = (x[11] & 1) | (x[10] & 2) | (x[9] & 4) |
			(x[8] & 8) | (x[7] & 16) | (x[6] & 32) |
			(x[5] & 64) | (x[4] & 128);
	y[12] = (x[12] & 1) | (x[11] & 2) | (x[10] & 4) |
			(x[9] & 8) | (x[8] & 16) | (x[7] & 32) |
			(x[6] & 64) | (x[5] & 128);
	y[13] = (x[13] & 1) | (x[12] & 2) | (x[11] & 4) |
			(x[10] & 8) | (x[9] & 16) | (x[8] & 32) |
			(x[7] & 64) | (x[6] & 128);
	y[14] = (x[14] & 1) | (x[13] & 2) | (x[12] & 4) |
			(x[11] & 8) | (x[10] & 16) | (x[9] & 32) |
			(x[8] & 64) | (x[7] & 128);
	y[15] = (x[15] & 1) | (x[14] & 2) | (x[13] & 4) |
			(x[12] & 8) | (x[11] & 16) | (x[10] & 32) |
			(x[9] & 64) | (x[8] & 128);

	memcpy(x, y, 16);
}

#endif // DIAMOND_USE_PERMTABLE

void Diamond2::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
	const byte *x = inBlock;
	byte y[16];

	substitute(0, y, x);
	for (int round=1; round < numrounds; round++)
	{
		permute(y);
		substitute(round, y, y);
	}

	if (xorBlock)
		xorbuf(outBlock, xorBlock, y, BLOCKSIZE);
	else
		memcpy(outBlock, y, BLOCKSIZE);
}

void Diamond2::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
	const byte *x = inBlock;
	byte y[16];

	substitute(numrounds-1, y, x);
	for (int round=numrounds-2; round >= 0; round--)
	{
		ipermute(y);
		substitute(round, y, y);
	}

	if (xorBlock)
		xorbuf(outBlock, xorBlock, y, BLOCKSIZE);
	else
		memcpy(outBlock, y, BLOCKSIZE);
}

void Diamond2Lite::Base::UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length, unsigned int rounds)
{
	AssertValidKeyLength(length);

	numrounds = rounds;
	s.New(numrounds * ROUNDSIZE);

	Diamond2SboxMaker m(userKey, length, rounds, true);
	m.MakeSbox(s, direction);
}

inline void Diamond2Lite::Base::substitute(int round, byte *x, const byte *y) const
{
	const byte *sbox = s + (ROUNDSIZE*round);
	x[0] = sbox[0*256+y[0]];
	x[1] = sbox[1*256+y[1]];
	x[2] = sbox[2*256+y[2]];
	x[3] = sbox[3*256+y[3]];
	x[4] = sbox[4*256+y[4]];
	x[5] = sbox[5*256+y[5]];
	x[6] = sbox[6*256+y[6]];
	x[7] = sbox[7*256+y[7]];
}

#ifdef DIAMOND_USE_PERMTABLE

inline void Diamond2Lite::Base::permute(byte *a)
{
	word32 temp      = permtable[0][a[0]] | permtable[1][a[1]] |
					   permtable[2][a[2]] | permtable[3][a[3]] |
					   permtable[4][a[4]] | permtable[5][a[5]] |
					   permtable[6][a[6]] | permtable[7][a[7]];

	((word32 *)a)[1] = permtable[0][a[4]] | permtable[1][a[5]] |
					   permtable[2][a[6]] | permtable[3][a[7]] |
					   permtable[4][a[0]] | permtable[5][a[1]] |
					   permtable[6][a[2]] | permtable[7][a[3]];

	((word32 *)a)[0] = temp;
}

inline void Diamond2Lite::Base::ipermute(byte *a)
{
	word32 temp      = ipermtable[0][a[0]] | ipermtable[1][a[1]] |
					   ipermtable[2][a[2]] | ipermtable[3][a[3]] |
					   ipermtable[4][a[4]] | ipermtable[5][a[5]] |
					   ipermtable[6][a[6]] | ipermtable[7][a[7]];

	((word32 *)a)[1] = ipermtable[0][a[4]] | ipermtable[1][a[5]] |
					   ipermtable[2][a[6]] | ipermtable[3][a[7]] |
					   ipermtable[4][a[0]] | ipermtable[5][a[1]] |
					   ipermtable[6][a[2]] | ipermtable[7][a[3]];

	((word32 *)a)[0] = temp;
}

#else

inline void Diamond2Lite::Base::permute(byte *a)
{
	byte b[8];

	b[0] = (a[0] & 1) + (a[1] & 2) + (a[2] & 4) + (a[3] & 8) + (a[4] & 0x10) +
		(a[5] & 0x20) + (a[6] & 0x40) + (a[7] & 0x80);
	b[1] = (a[1] & 1) + (a[2] & 2) + (a[3] & 4) + (a[4] & 8) + (a[5] & 0x10) +
		(a[6] & 0x20) + (a[7] & 0x40) + (a[0] & 0x80);
	b[2] = (a[2] & 1) + (a[3] & 2) + (a[4] & 4) + (a[5] & 8) + (a[6] & 0x10) +
		(a[7] & 0x20) + (a[0] & 0x40) + (a[1] & 0x80);
	b[3] = (a[3] & 1) + (a[4] & 2) + (a[5] & 4) + (a[6] & 8) + (a[7] & 0x10) +
		(a[0] & 0x20) + (a[1] & 0x40) + (a[2] & 0x80);
	b[4] = (a[4] & 1) + (a[5] & 2) + (a[6] & 4) + (a[7] & 8) + (a[0] & 0x10) +
		(a[1] & 0x20) + (a[2] & 0x40) + (a[3] & 0x80);
	b[5] = (a[5] & 1) + (a[6] & 2) + (a[7] & 4) + (a[0] & 8) + (a[1] & 0x10) +
		(a[2] & 0x20) + (a[3] & 0x40) + (a[4] & 0x80);
	b[6] = (a[6] & 1) + (a[7] & 2) + (a[0] & 4) + (a[1] & 8) + (a[2] & 0x10) +
		(a[3] & 0x20) + (a[4] & 0x40) + (a[5] & 0x80);
	b[7] = (a[7] & 1) + (a[0] & 2) + (a[1] & 4) + (a[2] & 8) + (a[3] & 0x10) +
		(a[4] & 0x20) + (a[5] & 0x40) + (a[6] & 0x80);

	memcpy(a, b, 8);
}

inline void Diamond2Lite::Base::ipermute(byte *b)
{
	byte a[8];

	a[0] = (b[0] & 1) + (b[7] & 2) + (b[6] & 4) + (b[5] & 8) + (b[4] & 0x10) +
		(b[3] & 0x20) + (b[2] & 0x40) + (b[1] & 0x80);
	a[1] = (b[1] & 1) + (b[0] & 2) + (b[7] & 4) + (b[6] & 8) + (b[5] & 0x10) +
		(b[4] & 0x20) + (b[3] & 0x40) + (b[2] & 0x80);
	a[2] = (b[2] & 1) + (b[1] & 2) + (b[0] & 4) + (b[7] & 8) + (b[6] & 0x10) +
		(b[5] & 0x20) + (b[4] & 0x40) + (b[3] & 0x80);
	a[3] = (b[3] & 1) + (b[2] & 2) + (b[1] & 4) + (b[0] & 8) + (b[7] & 0x10) +
		(b[6] & 0x20) + (b[5] & 0x40) + (b[4] & 0x80);
	a[4] = (b[4] & 1) + (b[3] & 2) + (b[2] & 4) + (b[1] & 8) + (b[0] & 0x10) +
		(b[7] & 0x20) + (b[6] & 0x40) + (b[5] & 0x80);
	a[5] = (b[5] & 1) + (b[4] & 2) + (b[3] & 4) + (b[2] & 8) + (b[1] & 0x10) +
		(b[0] & 0x20) + (b[7] & 0x40) + (b[6] & 0x80);
	a[6] = (b[6] & 1) + (b[5] & 2) + (b[4] & 4) + (b[3] & 8) + (b[2] & 0x10) +
		(b[1] & 0x20) + (b[0] & 0x40) + (b[7] & 0x80);
	a[7] = (b[7] & 1) + (b[6] & 2) + (b[5] & 4) + (b[4] & 8) + (b[3] & 0x10) +
		(b[2] & 0x20) + (b[1] & 0x40) + (b[0] & 0x80);

	memcpy(b, a, 8);
}

#endif // DIAMOND_USE_PERMTABLE

void Diamond2Lite::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
	const byte *x = inBlock;
	byte y[8];

	substitute(0, y, x);
	for (int round=1; round < numrounds; round++)
	{
		permute(y);
		substitute(round, y, y);
	}

	if (xorBlock)
		xorbuf(outBlock, xorBlock, y, BLOCKSIZE);
	else
		memcpy(outBlock, y, BLOCKSIZE);
}

void Diamond2Lite::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
	const byte *x = inBlock;
	byte y[8];

	substitute(numrounds-1, y, x);
	for (int round=numrounds-2; round >= 0; round--)
	{
		ipermute(y);
		substitute(round, y, y);
	}

	if (xorBlock)
		xorbuf(outBlock, xorBlock, y, BLOCKSIZE);
	else
		memcpy(outBlock, y, BLOCKSIZE);
}

NAMESPACE_END