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74 lines
2.5 KiB
C++
74 lines
2.5 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/Random.h>
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namespace Crypto::Curves {
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class Curve25519 {
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public:
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static constexpr u8 BASE_POINT_L_ORDER[33] {
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0xED, 0xD3, 0xF5, 0x5C, 0x1A, 0x63, 0x12, 0x58,
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0xD6, 0x9C, 0xF7, 0xA2, 0xDE, 0xF9, 0xDE, 0x14,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
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0x00
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};
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static constexpr u32 CURVE_D[8] {
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0x135978A3, 0x75EB4DCA, 0x4141D8AB, 0x00700A4D,
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0x7779E898, 0x8CC74079, 0x2B6FFE73, 0x52036CEE
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};
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static constexpr u32 CURVE_D_2[8] {
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0x26B2F159, 0xEBD69B94, 0x8283B156, 0x00E0149A,
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0xEEF3D130, 0x198E80F2, 0x56DFFCE7, 0x2406D9DC
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};
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static constexpr u32 ZERO[8] {
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0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
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};
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static constexpr u32 SQRT_MINUS_1[8] {
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0x4A0EA0B0, 0xC4EE1B27, 0xAD2FE478, 0x2F431806,
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0x3DFBD7A7, 0x2B4D0099, 0x4FC1DF0B, 0x2B832480
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};
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static constexpr u8 BARRETT_REDUCTION_QUOTIENT[33] {
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0x1B, 0x13, 0x2C, 0x0A, 0xA3, 0xE5, 0x9C, 0xED,
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0xA7, 0x29, 0x63, 0x08, 0x5D, 0x21, 0x06, 0x21,
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0xEB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0x0F
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};
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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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static void set(u32* a, u32 b);
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static void select(u32* r, u32 const* a, u32 const* b, u32 c);
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static void copy(u32* a, u32 const* b);
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static void modular_square(u32* r, u32 const* a);
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static void modular_subtract(u32* r, u32 const* a, u32 const* b);
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static void modular_reduce(u32* r, u32 const* a);
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static void modular_add(u32* r, u32 const* a, u32 const* b);
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static void modular_multiply(u32* r, u32 const* a, u32 const* b);
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static void modular_multiply_inverse(u32* r, u32 const* a);
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static void to_power_of_2n(u32* r, u32 const* a, u8 n);
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static void export_state(u32* a, u8* data);
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static void import_state(u32* a, u8 const* data);
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static void modular_subtract_single(u32* r, u32 const* a, u32 b);
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static void modular_multiply_single(u32* r, u32 const* a, u32 b);
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static void modular_add_single(u32* r, u32 const* a, u32 b);
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static u32 modular_square_root(u32* r, u32 const* a, u32 const* b);
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static u32 compare(u32 const* a, u32 const* b);
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};
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}
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