mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-02-04 10:07:27 -05:00
306ccd4927
-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT- Commits of previous years: - 2021:f47dda2c58- 2020:fa0074e2d8- 2019:aaaaad6ac9
25 lines
785 B
C++
25 lines
785 B
C++
// Copyright (c) 2018-2022 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_HKDF_SHA256_32_H
|
|
#define BITCOIN_CRYPTO_HKDF_SHA256_32_H
|
|
|
|
#include <crypto/hmac_sha256.h>
|
|
|
|
#include <cstdlib>
|
|
#include <stdint.h>
|
|
|
|
/** A rfc5869 HKDF implementation with HMAC_SHA256 and fixed key output length of 32 bytes (L=32) */
|
|
class CHKDF_HMAC_SHA256_L32
|
|
{
|
|
private:
|
|
unsigned char m_prk[32];
|
|
static const size_t OUTPUT_SIZE = 32;
|
|
|
|
public:
|
|
CHKDF_HMAC_SHA256_L32(const unsigned char* ikm, size_t ikmlen, const std::string& salt);
|
|
void Expand32(const std::string& info, unsigned char hash[OUTPUT_SIZE]);
|
|
};
|
|
|
|
#endif // BITCOIN_CRYPTO_HKDF_SHA256_32_H
|