siphash.h

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// Copyright (c) 2016-2020 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_SIPHASH_H
#define BITCOIN_CRYPTO_SIPHASH_H
 
#include <stdint.h>
 
#include <span.h>
#include <uint256.h>
 
class CSipHasher
{
private:
    uint64_t v[4];
    uint64_t tmp;
    uint8_t count; // Only the low 8 bits of the input size matter.
 
public:
    CSipHasher(uint64_t k0, uint64_t k1);
    CSipHasher& Write(uint64_t data);
    CSipHasher& Write(Span<const unsigned char> data);
    uint64_t Finalize() const;
};
 
uint64_t SipHashUint256(uint64_t k0, uint64_t k1, const uint256& val);
uint64_t SipHashUint256Extra(uint64_t k0, uint64_t k1, const uint256& val, uint32_t extra);
 
#endif // BITCOIN_CRYPTO_SIPHASH_H