// 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_HMAC_SHA512_H

#define BITCOIN_CRYPTO_HMAC_SHA512_H

#include <crypto/sha512.h>

#include <cstdlib>

#include <stdint.h>

/** A hasher class for HMAC-SHA-512. */

class CHMAC_SHA512

{

private:

    CSHA512 outer;

    CSHA512 inner;

public:

    static const size_t OUTPUT_SIZE = 64;

    CHMAC_SHA512(const unsigned char* key, size_t keylen);

    CHMAC_SHA512& Write(const unsigned char* data, size_t len)

    {

        inner.Write(data, len);

        return *this;

    }

    void Finalize(unsigned char hash[OUTPUT_SIZE]);

};

#endif // BITCOIN_CRYPTO_HMAC_SHA512_H