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sha256.cu
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sha256.cu
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/*
* sha256.cu Implementation of SHA256 Hashing
*
* Date: 12 June 2019
* Revision: 1
* *
* Based on the public domain Reference Implementation in C, by
* Brad Conte, original code here:
*
* https://github.com/B-Con/crypto-algorithms
*
* This file is released into the Public Domain.
*/
// SHA256 CUDA retrieved from https://github.com/mochimodev/cuda-hashing-algos/blob/master/
/*************************** HEADER FILES ***************************/
#include <cuda_runtime.h>
#include "device_launch_parameters.h"
#include <stdlib.h>
#include <memory.h>
#include <time.h>
#include <limits.h>
#include <stdio.h>
#include <time.h>
extern "C" {
#include "sha256.cuh"
}
/****************************** DATA STRUCTURE ******************************/
typedef struct {
unsigned char data[64];
unsigned int datalen;
unsigned long long bitlen;
unsigned int state[8];
} CUDA_SHA256_CTX;
/****************************** MACROS ******************************/
#define SHA256_HASH_SIZE 32 // SHA256 outputs a 32 byte digest
#define SHA256_BLOCK_SIZE 64
#define ID_SIZE 64
#define NUM_BLOCKS 8192
#define NUM_THREADS 256
// Error checking from https://stackoverflow.com/questions/14038589/what-is-the-canonical-way-to-check-for-errors-using-the-cuda-runtime-api
#define CHECK_ERROR(ans) { gpuAssert((ans), __FILE__, __LINE__); }
inline void gpuAssert(cudaError_t code, const char* file, int line, bool abort = true)
{
if (code != cudaSuccess)
{
fprintf(stderr, "GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
if (abort) exit(code);
}
}
/****************************** MACROS ******************************/
#ifndef ROTLEFT
#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
#endif
#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
/**************************** VARIABLES *****************************/
__constant__ unsigned int k[64] = {
0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
};
unsigned int k_host[64] = {
0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
};
/*********************** FUNCTION DEFINITIONS ***********************/
__host__ __device__ __forceinline__ void cuda_sha256_transform(CUDA_SHA256_CTX* ctx, const unsigned char data[])
{
unsigned int a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
for (i = 0, j = 0; i < 16; ++i, j += 4)
m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
for (; i < 64; ++i)
m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
a = ctx->state[0];
b = ctx->state[1];
c = ctx->state[2];
d = ctx->state[3];
e = ctx->state[4];
f = ctx->state[5];
g = ctx->state[6];
h = ctx->state[7];
for (i = 0; i < 64; ++i) {
#ifdef __CUDA_ARCH__
t1 = h + EP1(e) + CH(e, f, g) + k[i] + m[i];
#else
t1 = h + EP1(e) + CH(e, f, g) + k_host[i] + m[i];
#endif
t2 = EP0(a) + MAJ(a, b, c);
h = g;
g = f;
f = e;
e = d + t1;
d = c;
c = b;
b = a;
a = t1 + t2;
}
ctx->state[0] += a;
ctx->state[1] += b;
ctx->state[2] += c;
ctx->state[3] += d;
ctx->state[4] += e;
ctx->state[5] += f;
ctx->state[6] += g;
ctx->state[7] += h;
}
__host__ __device__ void cuda_sha256_init(CUDA_SHA256_CTX* ctx)
{
ctx->datalen = 0;
ctx->bitlen = 0;
ctx->state[0] = 0x6a09e667;
ctx->state[1] = 0xbb67ae85;
ctx->state[2] = 0x3c6ef372;
ctx->state[3] = 0xa54ff53a;
ctx->state[4] = 0x510e527f;
ctx->state[5] = 0x9b05688c;
ctx->state[6] = 0x1f83d9ab;
ctx->state[7] = 0x5be0cd19;
}
__host__ __device__ void cuda_sha256_update(CUDA_SHA256_CTX* ctx, const unsigned char data[], size_t len)
{
unsigned int i;
for (i = 0; i < len; ++i) {
ctx->data[ctx->datalen] = data[i];
ctx->datalen++;
if (ctx->datalen == 64) {
cuda_sha256_transform(ctx, ctx->data);
ctx->bitlen += 512;
ctx->datalen = 0;
}
}
}
__host__ __device__ void cuda_sha256_final(CUDA_SHA256_CTX* ctx, unsigned char hash[])
{
unsigned int i;
i = ctx->datalen;
// Pad whatever data is left in the buffer.
if (ctx->datalen < 56) {
ctx->data[i++] = 0x80;
while (i < 56)
ctx->data[i++] = 0x00;
}
else {
ctx->data[i++] = 0x80;
while (i < 64)
ctx->data[i++] = 0x00;
cuda_sha256_transform(ctx, ctx->data);
memset(ctx->data, 0, 56);
}
// Append to the padding the total message's length in bits and transform.
ctx->bitlen += ctx->datalen * 8;
ctx->data[63] = (unsigned char) (ctx->bitlen);
ctx->data[62] = (unsigned char) (ctx->bitlen >> 8);
ctx->data[61] = (unsigned char) (ctx->bitlen >> 16);
ctx->data[60] = (unsigned char) (ctx->bitlen >> 24);
ctx->data[59] = (unsigned char) (ctx->bitlen >> 32);
ctx->data[58] = (unsigned char) (ctx->bitlen >> 40);
ctx->data[57] = (unsigned char) (ctx->bitlen >> 48);
ctx->data[56] = (unsigned char) (ctx->bitlen >> 56);
cuda_sha256_transform(ctx, ctx->data);
// Since this implementation uses little endian byte ordering and SHA uses big endian,
// reverse all the bytes when copying the final state to the output hash.
for (i = 0; i < 4; ++i) {
hash[i] = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
hash[i + 4] = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
hash[i + 8] = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
}
}
__global__ void kernel_sha256_hash(unsigned char* indata, unsigned int inlen, unsigned char* outdata, unsigned int n_batch)
{
unsigned int thread = blockIdx.x * blockDim.x + threadIdx.x;
if (thread >= n_batch)
{
return;
}
unsigned char* in = indata + thread * inlen;
unsigned char* out = outdata + thread * SHA256_HASH_SIZE;
CUDA_SHA256_CTX ctx;
cuda_sha256_init(&ctx);
cuda_sha256_update(&ctx, in, inlen);
cuda_sha256_final(&ctx, out);
}
__host__ __device__ unsigned char verify_zeroes(unsigned char* hash) {
unsigned char num_zeroes = 0;
unsigned char leading = 1;
unsigned char i;
for (i = 0; i < SHA256_HASH_SIZE; i++) {
leading = leading && ((hash[i] | 0x0f) == 0x0f);
num_zeroes += leading ? 1 : 0;
leading = leading && ((hash[i] | 0xf0) == 0xf0);
num_zeroes += leading ? 1 : 0;
}
return num_zeroes;
}
__global__ void kernel_mine_coin_child(CUDA_SHA256_CTX* hash_start, unsigned char* id, long long* result, long long start, unsigned char difficulty) {
long long data_num = (blockIdx.x * blockDim.x + threadIdx.x) + start;
unsigned char hash[SHA256_HASH_SIZE];
CUDA_SHA256_CTX ctx;
memcpy(&ctx, hash_start, sizeof(CUDA_SHA256_CTX));
cuda_sha256_update(&ctx, (unsigned char*) &data_num, sizeof(data_num));
cuda_sha256_update(&ctx, id, ID_SIZE);
cuda_sha256_final(&ctx, hash);
unsigned char num_zeroes = verify_zeroes(hash);
if (num_zeroes < difficulty)
return;
*result = data_num;
}
extern "C" {
long long cuda_mine_coin(const unsigned char* hash_start, const unsigned char* id, size_t hash_start_size, size_t id_size, unsigned char* difficulty, int* latest_timestamp) {
unsigned char* cuda_id;
CUDA_SHA256_CTX* cuda_sha256_ctx;
long long* cuda_result;
long long host_result = -1;
long long ret = -1;
int coin_timestamp = *latest_timestamp;
CUDA_SHA256_CTX ctx;
cuda_sha256_init(&ctx);
cuda_sha256_update(&ctx, hash_start, hash_start_size);
CHECK_ERROR(cudaHostAlloc((void**)&cuda_result, sizeof(long long), cudaHostAllocDefault));
CHECK_ERROR(cudaMalloc((void**)&cuda_sha256_ctx, sizeof(CUDA_SHA256_CTX)));
CHECK_ERROR(cudaMalloc((void**)&cuda_id, id_size));
CHECK_ERROR(cudaMemcpy(cuda_sha256_ctx, &ctx, sizeof(CUDA_SHA256_CTX), cudaMemcpyHostToDevice));
CHECK_ERROR(cudaMemcpy(cuda_id, id, id_size, cudaMemcpyHostToDevice));
for (long long i = 0; i < LLONG_MAX - NUM_BLOCKS * NUM_THREADS; i += NUM_BLOCKS * NUM_THREADS) {
host_result = -1;
// Generate random start num for kernel
long long start_num = rand();
start_num = start_num << 31;
start_num |= rand();
// Prevent overflow when iterating in kernel
start_num -= NUM_BLOCKS * NUM_THREADS;
// Run kernel to compute hashes
CHECK_ERROR(cudaMemcpy(cuda_result, &host_result, sizeof(long long), cudaMemcpyHostToDevice));
kernel_mine_coin_child <<<NUM_BLOCKS, NUM_THREADS>>> (cuda_sha256_ctx, cuda_id, cuda_result, start_num, *difficulty);
CHECK_ERROR(cudaMemcpy(&host_result, cuda_result, sizeof(long long), cudaMemcpyDeviceToHost));
// Check if valid hash was found
if (host_result != -1) {
ret = host_result;
goto end;
}
// Check if coin is stale;
if (*latest_timestamp > coin_timestamp) {
#ifdef DEBUG
printf("Coin is stale. Ending iteration\n");
#endif
ret = -1;
goto end;
}
}
end:
CHECK_ERROR(cudaFree(cuda_id));
CHECK_ERROR(cudaFreeHost(cuda_result));
CHECK_ERROR(cudaFree(cuda_sha256_ctx));
return ret;
}
}