54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2015-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include <array>
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#include <cstdint>
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#include <cstddef>
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#include <cruft/util/view.hpp>
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#include <cruft/util/std.hpp>
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namespace cruft::crypto::block {
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/// An implementation of the "Tiny Encryption Algorithm" block cipher.
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///
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/// ref: http://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm
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class TEA {
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public:
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using key_t = std::array<u32,4>;
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using word_t = u32;
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static constexpr std::size_t block_size = sizeof (word_t) * 2;
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explicit TEA (key_t);
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/// Encrypt the contents of `src` into the buffer `dst`.
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///
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/// src and dst are assumed to be equal sizes, multiples of block_size
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/// bytes, and suitably aligned for SIMD.
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///
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/// \param dst The location of the output
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/// \param src The location of the input
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void encrypt (cruft::view<word_t*> dst, cruft::view<word_t const*> src);
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/// Decrypt the contents of `src` into the buffer `dst`.
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///
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/// src and dst are assumed to be equal sizes, multiples of block_size
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/// bytes, and suitably aligned for SIMD.
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///
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/// \param dst The location of the output
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/// \param src The location of the input
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void decrypt (cruft::view<word_t*> dst, cruft::view<word_t const*> src);
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private:
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key_t const m_key;
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};
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}
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