mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-02-09 10:43:19 -05:00
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
// Copyright (c) 2014-2022 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#ifndef BITCOIN_CRYPTO_SHA256_H
|
|
#define BITCOIN_CRYPTO_SHA256_H
|
|
|
|
#include <cstdlib>
|
|
#include <stdint.h>
|
|
#include <string>
|
|
|
|
/** A hasher class for SHA-256. */
|
|
class CSHA256
|
|
{
|
|
private:
|
|
uint32_t s[8];
|
|
unsigned char buf[64];
|
|
uint64_t bytes{0};
|
|
|
|
public:
|
|
static const size_t OUTPUT_SIZE = 32;
|
|
|
|
CSHA256();
|
|
CSHA256& Write(const unsigned char* data, size_t len);
|
|
void Finalize(unsigned char hash[OUTPUT_SIZE]);
|
|
CSHA256& Reset();
|
|
};
|
|
|
|
namespace sha256_implementation {
|
|
enum UseImplementation : uint8_t {
|
|
STANDARD = 0,
|
|
USE_SSE4 = 1 << 0,
|
|
USE_AVX2 = 1 << 1,
|
|
USE_SHANI = 1 << 2,
|
|
USE_SSE4_AND_AVX2 = USE_SSE4 | USE_AVX2,
|
|
USE_SSE4_AND_SHANI = USE_SSE4 | USE_SHANI,
|
|
USE_ALL = USE_SSE4 | USE_AVX2 | USE_SHANI,
|
|
};
|
|
}
|
|
|
|
/** Autodetect the best available SHA256 implementation.
|
|
* Returns the name of the implementation.
|
|
*/
|
|
std::string SHA256AutoDetect(sha256_implementation::UseImplementation use_implementation = sha256_implementation::USE_ALL);
|
|
|
|
/** Compute multiple double-SHA256's of 64-byte blobs.
|
|
* output: pointer to a blocks*32 byte output buffer
|
|
* input: pointer to a blocks*64 byte input buffer
|
|
* blocks: the number of hashes to compute.
|
|
*/
|
|
void SHA256D64(unsigned char* output, const unsigned char* input, size_t blocks);
|
|
|
|
#endif // BITCOIN_CRYPTO_SHA256_H
|