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Implement Threefish block cipher #57

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Implement Threefish block cipher #57

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241 changes: 241 additions & 0 deletions include/nil/crypto3/block/detail/threefish/threefish_policy.hpp
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Original file line number Diff line number Diff line change
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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2020 Mikhail Komarov <[email protected]>
//
// Distributed under the Boost Software License, Version 1.0
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
//---------------------------------------------------------------------------//

#ifndef CRYPTO3_THREEFISH_POLICY_HPP
#define CRYPTO3_THREEFISH_POLICY_HPP

#include <array>

#include <nil/crypto3/detail/basic_functions.hpp>

namespace nil {
namespace crypto3 {
namespace block {
namespace detail {

template<std::size_t KeyBits>
struct basic_threefish_policy : public ::nil::crypto3::detail::basic_functions<64> {

constexpr static const std::size_t block_bits = KeyBits;
constexpr static const std::size_t block_words = block_bits / word_bits;
typedef std::array<word_type, block_words> block_type;

constexpr static const std::size_t key_bits = KeyBits;
constexpr static const std::size_t key_words = key_bits / word_bits;
typedef std::array<word_type, key_words> key_type;
typedef std::array<word_type, key_words + 1> key_schedule_type;

constexpr static const std::size_t tweak_bits = 128;
constexpr static const std::size_t tweak_words = tweak_bits / word_bits;
typedef std::array<word_type, tweak_words> tweak_type;
typedef std::array<word_type, tweak_words + 1> tweak_schedule_type;

typedef std::array<unsigned, block_words> permutations_type;
typedef std::array<std::array<std::size_t, block_words / 2>, 8> rotations_type;
};

template<std::size_t KeyBits>
struct threefish_policy;

template<>
struct threefish_policy<256> : basic_threefish_policy<256> {

constexpr static const std::size_t rounds = 72;
typedef std::array<word_type, rounds> constants_type;

constexpr static const permutations_type permutation = {{0, 3, 2, 1}};

constexpr static const rotations_type rotations = {{
#ifdef CRYPTO3_BLOCK_THREEFISH_OLD_ROTATION_CONSTANTS
{{ 5,
56 }},
{{ 36,
28 }},
{{ 13,
46 }},
{{ 58,
44 }},
{{ 26,
20 }},
{{ 53,
35 }},
{{ 11,
42 }},
{{ 59,
50 }},
#else
{{14, 16}},
{{52, 57}},
{{23, 40}},
{{5, 37}},
{{25, 33}},
{{46, 12}},
{{58, 22}},
{{32, 32}},
#endif
}};
};

constexpr threefish_policy<256>::permutations_type const threefish_policy<256>::permutation;
constexpr threefish_policy<256>::rotations_type const threefish_policy<256>::rotations;

template<>
struct threefish_policy<512> : basic_threefish_policy<512> {

constexpr static const std::size_t rounds = 72;
typedef std::array<word_type, rounds> constants_type;

constexpr static permutations_type const permutation = {{2, 1, 4, 7, 6, 5, 0, 3}};

constexpr static rotations_type const rotations = {{
#ifdef CRYPTO3_BLOCK_THREEFISH_OLD_ROTATION_CONSTANTS
{{ 38,
30,
50,
53 }},
{{ 48,
20,
43,
31 }},
{{ 34,
14,
15,
27 }},
{{ 26,
12,
58,
7 }},
{{ 33,
49,
8,
42 }},
{{ 39,
27,
41,
14 }},
{{ 29,
26,
11,
9 }},
{{ 33,
51,
39,
35 }},
#else
{{46, 36, 19, 37}},
{{33, 27, 14, 42}},
{{17, 49, 36, 39}},
{{44, 9, 54, 56}},
{{39, 30, 34, 24}},
{{13, 50, 10, 17}},
{{25, 29, 39, 43}},
{{8, 35, 56, 22}}
#endif
}};
};

constexpr threefish_policy<512>::permutations_type const threefish_policy<512>::permutation;
constexpr threefish_policy<512>::rotations_type const threefish_policy<512>::rotations;

template<>
struct threefish_policy<1024> : basic_threefish_policy<1024> {

constexpr static const std::size_t rounds = 80;
typedef std::array<word_type, rounds> constants_type;

constexpr static permutations_type const permutation = {
{0, 9, 2, 13, 6, 11, 4, 15, 10, 7, 12, 3, 14, 5, 8, 1}};

constexpr static rotations_type const rotations = {{
#ifdef CRYPTO3_BLOCK_THREEFISH_OLD_ROTATION_CONSTANTS
{{ 55,
43,
37,
40,
16,
22,
38,
12 }},
{{ 25,
25,
46,
13,
14,
13,
52,
57 }},
{{ 33,
8,
18,
57,
21,
12,
32,
54 }},
{{ 34,
43,
25,
60,
44,
9,
59,
34 }},
{{ 28,
7,
47,
48,
51,
9,
35,
41 }},
{{ 17,
6,
18,
25,
43,
42,
40,
15 }},
{{ 58,
7,
32,
45,
19,
18,
2,
56 }},
{{ 47,
49,
27,
58,
37,
48,
53,
56 }},
#else
{{24, 13, 8, 47, 8, 17, 22, 37}},
{{38, 19, 10, 55, 49, 18, 23, 52}},
{{33, 4, 51, 13, 34, 41, 59, 17}},
{{5, 20, 48, 41, 47, 28, 16, 25}},
{{41, 9, 37, 31, 12, 47, 44, 30}},
{{16, 34, 56, 51, 4, 53, 42, 41}},
{{31, 44, 47, 46, 19, 42, 44, 25}},
{{9, 48, 35, 52, 23, 31, 37, 20}}
#endif
}};
};

constexpr threefish_policy<1024>::permutations_type const threefish_policy<1024>::permutation;
constexpr threefish_policy<1024>::rotations_type const threefish_policy<1024>::rotations;

} // namespace detail
} // namespace block
} // namespace crypto3
} // namespace nil

#endif // CRYPTO3_THREEFISH_POLICY_HPP
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