1// Copyright (c) 2014-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_CRYPTO_SHA1_H
6#define BITCOIN_CRYPTO_SHA1_H
7
8#include <cstddef>
9#include <cstdint>
10
11/** A hasher class for SHA1. */
12class CSHA1
13{
14private:
15    uint32_t s[5];
16    unsigned char buf[64];
17    uint64_t bytes{0};
18
19public:
20    static constexpr size_t OUTPUT_SIZE = 20;
21
22    CSHA1();
23    CSHA1& Write(const unsigned char* data, size_t len);
24    void Finalize(unsigned char hash[OUTPUT_SIZE]);
25    CSHA1& Reset();
26};
27
28#endif // BITCOIN_CRYPTO_SHA1_H
29