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always assume 2 blocks

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orignal 2017-05-01 15:30:35 -04:00
parent 8e9f64b162
commit 2fd74c6a34
1 changed files with 25 additions and 30 deletions
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55
gost/cuda_gosthash.cu
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@ -840,36 +840,22 @@ void GOST_g_N(uint64_t* h, uint64_t* const M, uint64_t* const N)
__device__ __forceinline__
void GOST_hash_X(uint64_t *hash, uchar * const message, uint32_t len)
void GOST_hash_X(uint64_t *hash, uint64_t * const message, uint32_t len) // always 2 blocks of 64 bytes, len is length of first block in bits (either 0 or 128)
{
uint64_t Sigma[8] = { 0 };
uint64_t N[8] = { 0 };
// Stage 2
while (len >= 64)
{
uint64_t X[8];
memcpy(X, message + len - 64, 64);
// second block
GOST_g_N(hash, message + 8, N);
GOST_Add32 (N, 512);
GOST_Add512(Sigma, Sigma, message + 8);
GOST_g_N(hash, X, N);
GOST_Add32 (N, 512);
GOST_Add512(Sigma, Sigma, X);
len -= 64;
}
// first block
GOST_g_N(hash, message, N);
GOST_Add32 (N, len);
GOST_Add512(Sigma, Sigma, message);
uint64_t M[8];
uchar* m = (uchar*) M;
uint32_t padding = 64 - len;
memset(m, 0, padding - 1);
m[padding - 1] = 1;
memcpy (m + padding, message, len);
// Stage 3 (Close)
GOST_g_N(hash, M, N);
GOST_Add32 (N, len << 3); // len*8
GOST_Add512(Sigma, Sigma, M);
memset(M, 0, 64);
uint64_t M[8] = { 0 };
GOST_g_N(hash, N, M);
GOST_g_N(hash, Sigma, M);
}
@ -882,16 +868,25 @@ void gostd_gpu_hash_80(const uint32_t threads, const uint32_t startNonce, uint32
if (thread < threads)
{
const uint32_t nonce = startNonce + thread;
uint32_t dat[20];
// first hash (GOST 34.11-512 over 80 bytes)
uint32_t __align__(8) dat[32];
// fill first 48 bytes and leading 1
#pragma unroll
for (int i = 0; i < 19; i++) dat[i] = c_header[i];
dat[19] = cuda_swab32 (nonce);
uint64_t hash1[8] = { 0 }; //iv for 512
GOST_hash_X(hash1, (uchar*)dat, 80); // 80 bytes
for (int i = 0; i < 11; i++) dat[i] = 0;
dat[11] = 0x01000000;
// copy actual header
#pragma unroll
for (int i = 0; i < 19; i++) dat[i + 12] = c_header[i];
dat[19 + 12] = cuda_swab32 (nonce);
uint64_t hash1[16] = { 0 }; // iv for 512
hash1[7] = 0x0100000000000000; // set leading 1
GOST_hash_X(hash1 + 8, (uint64_t *)dat, 128);
// second hash (GOST 34.11-256 over 64 bytes)
uint64_t hash[8];
#pragma unroll
for (int i=0; i< 8; i++) hash[i] = 0x0101010101010101; // iv for 256
GOST_hash_X(hash, (uchar *)hash1, 64); // 64 bytes
GOST_hash_X(hash, hash1, 0);
// result is first 32 bytes of hash
uint64_t high = MAKE_ULONGLONG(cuda_swab32(_HIDWORD(hash[0])), cuda_swab32(_LODWORD(hash[0]))); // swab uint64_t and invert