blob: d3735203005f0ee0af116506263eabdddb4230b3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// 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
|
