80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2018 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_CRYPTO_HASH_BLAKE_HPP
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#define CRUFT_CRYPTO_HASH_BLAKE_HPP
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#include <cruft/util/view.hpp>
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#include <array>
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#include <cstdint>
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#include <cstdlib>
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///////////////////////////////////////////////////////////////////////////////
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namespace cruft::crypto::hash {
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///////////////////////////////////////////////////////////////////////////
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template <int>
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struct traits {};
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//-------------------------------------------------------------------------
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template <>
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struct traits<256>
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{
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using word_t = uint32_t;
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static const std::array<word_t,8> iv;
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static const std::array<word_t,16> pi;
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static const std::array<int,4> rotations;
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static constexpr int rounds = 14;
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};
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//-------------------------------------------------------------------------
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template <>
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struct traits<512>
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{
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using word_t = uint64_t;
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static const std::array<word_t,8> iv;
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static const std::array<word_t,16> pi;
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static const std::array<int,4> rotations;
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static constexpr int rounds = 16;
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};
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template <int width>
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class blake {
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public:
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using word_t = typename traits<width>::word_t;
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using digest_t = std::array<uint8_t,32>;
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static const size_t BLOCK_SIZE = 512;
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static const size_t DIGEST_SIZE = sizeof (digest_t);
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digest_t operator() (util::view<const uint8_t*> data,
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const std::array<word_t,4> salt) const noexcept;
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digest_t operator() (util::view<const uint8_t*> data) const noexcept
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{
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return (*this) (data, {0,0,0,0});
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}
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};
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}
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#endif
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