c++ problem

[Kostelooscoin]

Code:

#include <cstdint>
#include <iostream>
#include <cuda_runtime.h>
#include <iomanip>
#include <openssl/ripemd.h>
#include <openssl/sha.h>

#define BLOCK_SIZE 1024

__global__ void hash160(char *pattern, unsigned char *out, uint32_t *nonce)
{
	uint32_t index = blockIdx.x * blockDim.x + threadIdx.x;

	unsigned char hash[SHA256_DIGEST_LENGTH];
	char str[64];

	for (int i = 0; i < 9; i++) {
		str[i] = pattern[i];
	}

	for (uint32_t i = *nonce; i < UINT32_MAX; i += gridDim.x * blockDim.x) {
		sprintf(&str[9], "%08x", i);
		SHA256((const unsigned char*)str, strlen(str), hash);
		RIPEMD160(hash, SHA256_DIGEST_LENGTH, &out[index * 20]);
		if (out[index * 20] == 0x00 && out[index * 20 + 1] == 0x00) {
			// Found a match!
			*nonce = i;
			break;
		}
	}
}

int main()
{
	char pattern[10] = "1abcdefg"; // 9 characters pattern

								   // Allocate memory on the host
	unsigned char *out = new unsigned char[3 * 20];
	uint32_t *nonce = new uint32_t;
	*nonce = 0;

	// Allocate memory on the device
	char *dev_pattern;
	unsigned char *dev_out;
	uint32_t *dev_nonce;

	cudaMalloc((void**)&dev_pattern, 10);
	cudaMalloc((void**)&dev_out, 3 * 20);
	cudaMalloc((void**)&dev_nonce, sizeof(uint32_t));

	// Copy input data to the device
	cudaMemcpy(dev_pattern, pattern, 10, cudaMemcpyHostToDevice);
	cudaMemcpy(dev_out, out, 3 * 20, cudaMemcpyHostToDevice);
	cudaMemcpy(dev_nonce, nonce, sizeof(uint32_t), cudaMemcpyHostToDevice);

	// Launch the kernel
	hash160 << < 3, BLOCK_SIZE >> >(dev_pattern, dev_out, dev_nonce);

	// Copy output data from the device
	cudaMemcpy(out, dev_out, 3 * 20, cudaMemcpyDeviceToHost);
	cudaMemcpy(nonce, dev_nonce, sizeof(uint32_t), cudaMemcpyDeviceToHost);

	// Print the results
	for (int i = 0; i < 3; i++) {
		std::cout << "Address " << i + 1 << ": " << std::setbase(16);
		for (int j = 0; j < 20; j++) {
			std::cout << std::setw(2) << std::setfill('0') << (int)out[i * 20 + j];
		}
		std::cout << std::endl;
	}
	std::cout << "Nonce: " << *nonce << std::endl;

	// Free memory
	delete[] out;
	delete nonce;
	cudaFree(dev_pattern);
	cudaFree(dev_out);
	cudaFree(dev_nonce);

	return 0;
}

blockIdx.x * blockDim.x + threadIdx.x undefinited why

[1714505683]

1714505683

[1714505683]

1714505683

[1714505683]

1714505683

[1714505683]

1714505683

[ymgve2]

Those are probably just warnings because Visual Studio doesn't always know about internal CUDA variables. The main issue is that it can't find your OpenSSL header file, that's what's blocking the compile.

[Kostelooscoin]

I installed openssl but nothing works

[albert0bsd]

Where that code come from, seems that you only copy and paste part of some code.

The variables that you are refering don't exist:

Code:

uint32_t index = blockIdx.x * blockDim.x + threadIdx.x;

blockIdx, blockDim and threadIdx  aren't declared anywhere.

Regards!

[Kostelooscoin]

I solved everything but there is still one small problem

hash160 << < 3, BLOCK_SIZE >> >(dev_pattern, dev_out, dev_nonce);

in red probleme

[ymgve2]

When you created the project, did you create it as a CUDA project so it uses the CUDA compiler?

[Kostelooscoin]

yes but it doesn't change anything

[NeuroticFish]

I solved everything but there is still one small problem

hash160 << < 3, BLOCK_SIZE >> >(dev_pattern, dev_out, dev_nonce);

<<< works in java, not in C++
<< < needs something in between (a bitwise shift maybe and then a comparison?)

But, since in the first post we have

__global__ void hash160(char *pattern, unsigned char *out, uint32_t *nonce)

you seem to be calling that void function, hence I would comment that erroneous line (at least for now) and put instead:

hash160(dev_pattern, dev_out, dev_nonce);


It seems that I was wrong, sorry, see below.

[ymgve2]

I solved everything but there is still one small problem

hash160 << < 3, BLOCK_SIZE >> >(dev_pattern, dev_out, dev_nonce);

<<< works in java, not in C++
<< < needs something in between (a bitwise shift maybe and then a comparison?)

But, since in the first post we have

Code:

__global__ void hash160(char *pattern, unsigned char *out, uint32_t *nonce)

you seem to be calling that void function, hence I would comment that erroneous line (at least for now) and put instead:

Code:

hash160(dev_pattern, dev_out, dev_nonce);

I have difficulties to understand what you aim for with a code you cannot even read.

<<<a,b>>> is an extension to C++ to launch CUDA kernels, it is perfectly valid in CUDA code

https://medium.com/analytics-vidhya/cuda-compute-unified-device-architecture-part-2-f3841c25375e

[NeuroticFish]

<<<a,b>>> is an extension to C++ to launch CUDA kernels, it is perfectly valid in CUDA code

https://medium.com/analytics-vidhya/cuda-compute-unified-device-architecture-part-2-f3841c25375e

CUDA I don't know 
So the only error is that extra space and should have been

Code:

hash160 <<< 3, BLOCK_SIZE >>>(dev_pattern, dev_out, dev_nonce);

??

Or also Visual Studio doesn't handle this well or is missing something?
That Medium page also tells (yeah, that guy was installing on Linux) about CUDA Toolkit and so on.

[ymgve2]

<<<a,b>>> is an extension to C++ to launch CUDA kernels, it is perfectly valid in CUDA code

https://medium.com/analytics-vidhya/cuda-compute-unified-device-architecture-part-2-f3841c25375e

CUDA I don't know 
So the only error is that extra space and should have been

Code:

hash160 <<< 3, BLOCK_SIZE >>>(dev_pattern, dev_out, dev_nonce);

??

Or also Visual Studio doesn't handle this well or is missing something?
That Medium page also tells (yeah, that guy was installing on Linux) about CUDA Toolkit and so on.

The space doesn't matter, Visual Studio autocorrects it to << <a, b >> > and it will still compile fine if everything's set up correctly.

[Kostelooscoin]

hash160 << <3, BLOCK_SIZE >> >(dev_pattern, dev_out, dev_nonce);

same error