mirror of
https://github.com/RGBCube/serenity
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40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
/*
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* Copyright (c) 2022, stelar7 <dudedbz@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/ByteBuffer.h>
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namespace Crypto::Curves {
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class X25519 {
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static constexpr u8 BITS = 255;
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static constexpr u8 BYTES = 32;
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static constexpr u8 WORDS = 8;
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static constexpr u32 A24 = 121666;
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public:
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static ErrorOr<ByteBuffer> compute_coordinate(ReadonlyBytes a, ReadonlyBytes b);
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private:
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static void import_state(u32* state, ReadonlyBytes data);
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static ErrorOr<ByteBuffer> export_state(u32* data);
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static void select(u32* state, u32* a, u32* b, u32 condition);
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static void set(u32* state, u32 value);
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static void copy(u32* state, u32* value);
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static void conditional_swap(u32* first, u32* second, u32 condition);
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static void modular_multiply_single(u32* state, u32* first, u32 second);
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static void modular_square(u32* state, u32* value);
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static void modular_multiply(u32* state, u32* first, u32* second);
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static void modular_add(u32* state, u32* first, u32* second);
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static void modular_subtract(u32* state, u32* first, u32* second);
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static void modular_reduce(u32* state, u32* data);
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static void to_power_of_2n(u32* state, u32* value, u8 n);
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static void modular_multiply_inverse(u32* state, u32* value);
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};
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}
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