C++ (Cpp) xor_salsa8_sse2 Exemples

Exemple #1

Fichier : scrypt-sse2.cpp Projet : GenesisCoinTeam/genesiscoin

void scrypt_N_1_1_256_sp_sse2(const char *input, char *output, char *scratchpad, unsigned char Nfactor)
{
	uint8_t B[128];
	union {
		__m128i i128[8];
		uint32_t u32[32];
	} X;
	__m128i *V;
	uint32_t i, j, k, N;

	V = (__m128i *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));

	PBKDF2_SHA256((const uint8_t *)input, 80, (const uint8_t *)input, 80, 1, B, 128);

	for (k = 0; k < 2; k++) {
		for (i = 0; i < 16; i++) {
			X.u32[k * 16 + i] = le32dec(&B[(k * 16 + (i * 5 % 16)) * 4]);
		}
	}

        N = (1 << (Nfactor + 1));
        
	for (i = 0; i < N; i++) {
		for (k = 0; k < 8; k++)
			V[i * 8 + k] = X.i128[k];
		xor_salsa8_sse2(&X.i128[0], &X.i128[4]);
		xor_salsa8_sse2(&X.i128[4], &X.i128[0]);
	}
	for (i = 0; i < N; i++) {
		//j = 8 * (X.u32[16] & 1023);
                j = 8 * (X.u32[16] & (N-1));
		for (k = 0; k < 8; k++)
			X.i128[k] = _mm_xor_si128(X.i128[k], V[j + k]);
		xor_salsa8_sse2(&X.i128[0], &X.i128[4]);
		xor_salsa8_sse2(&X.i128[4], &X.i128[0]);
	}

	for (k = 0; k < 2; k++) {
		for (i = 0; i < 16; i++) {
			le32enc(&B[(k * 16 + (i * 5 % 16)) * 4], X.u32[k * 16 + i]);
		}
	}

	PBKDF2_SHA256((const uint8_t *)input, 80, B, 128, 1, (uint8_t *)output, 32);
}

Exemple #2

Fichier : scrypt-sse2.cpp Projet : megcoin/megcoin

void scrypt_8_4_1_256_sp_sse2(const char *input, char *output, char *scratchpad)
{
	const int N=123;
	uint8_t B[128];
	union {
		__m128i i128[8];
		uint32_t u32[32];
	} X;
	__m128i *V;
	uint32_t i, j, k;

	V = (__m128i *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));

	PBKDF2_SHA256((const uint8_t *)input, 80, (const uint8_t *)input, 80, 1, B, 128);

	for (k = 0; k < 2; k++) {
		for (i = 0; i < 16; i++) {
			X.u32[k * 16 + i] = le32dec(&B[(k * 16 + (i * 5 % 16)) * 4]);
		}
	}

	for (i = 0; i < N; i++) {
		for (k = 0; k < 8; k++)
			V[i * 8 + k] = X.i128[k];
		xor_salsa8_sse2(&X.i128[0], &X.i128[4]);
		xor_salsa8_sse2(&X.i128[4], &X.i128[0]);
	}
	for (i = 0; i < N i++) {
		j = 8 * (X.u32[16] % (N));
		for (k = 0; k < 8; k++)
			X.i128[k] = _mm_xor_si128(X.i128[k], V[j + k]);
		xor_salsa8_sse2(&X.i128[0], &X.i128[4]);
		xor_salsa8_sse2(&X.i128[4], &X.i128[0]);
	}

	for (k = 0; k < 2; k++) {
		for (i = 0; i < 16; i++) {
			le32enc(&B[(k * 16 + (i * 5 % 16)) * 4], X.u32[k * 16 + i]);
		}
	}

	PBKDF2_SHA256((const uint8_t *)input, 80, B, 128, 1, (uint8_t *)output, 32);
}