libcruft-util/hash/siphash.hpp
Danny Robson f6056153e3 rename root namespace from util to cruft
This places, at long last, the core library code into the same namespace
as the extended library code.
2018-08-05 14:42:02 +10:00

36 lines
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C++

/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2016-2018 Danny Robson <danny@nerdcruft.net>
*/
#ifndef CRUFT_UTIL_HASH_SIPHASH_HPP
#define CRUFT_UTIL_HASH_SIPHASH_HPP
#include "../view.hpp"
#include <cstdint>
#include <type_traits>
namespace cruft::hash {
template <int CompressionsV = 2, int FinalisationsV = 4>
class siphash {
public:
using digest_t = std::uint64_t;
static constexpr auto compression_rounds = CompressionsV;
static constexpr auto finalisation_rounds = FinalisationsV;
siphash (std::array<uint64_t,2>) noexcept;
digest_t operator() (cruft::view<const std::uint8_t*> data) const noexcept;
private:
std::array<uint64_t,2> m_key;
};
};
#endif