51 lines
1.5 KiB
C++
51 lines
1.5 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_BLAKE2_HPP
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#define CRUFT_CRYPTO_HASH_BLAKE2_HPP
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#include <cruft/util/view.hpp>
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#include <array>
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namespace cruft::crypto::hash {
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// RFC7693: The BLAKE2 Cryptographic Hash and Message Authentication Code
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class blake2 {
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public:
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using salt_t = std::array<uint8_t,64>;
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using digest_t = std::array<uint8_t,64>;
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blake2 () noexcept;
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blake2 (const salt_t&) noexcept;
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blake2 (util::view<const uint8_t*> key);
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digest_t operator() (util::view<const uint8_t*>) const noexcept;
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private:
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using state_t = std::array<uint64_t,8>;
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// we store zero padded salt because it simplifies later state
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// updates, not because it's a functional requirement. either way we
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// need to copy at least 64 bytes, so the user shouldn't be copying
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// these too much regardless.
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std::array<uint8_t,128> m_salt;
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uint64_t m_keylen;
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};
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};
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#endif
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