block/include/nil/crypto3/block/detail/md4/md4_policy.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2020 Mikhail Komarov <nemo@nil.foundation>
//
// MIT License
//
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// of this software and associated documentation files (the "Software"), to deal
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_BLOCK_CIPHERS_DETAIL_MD4_POLICY_HPP
#define CRYPTO3_BLOCK_CIPHERS_DETAIL_MD4_POLICY_HPP
 
#include <array>
 
#include <nil/crypto3/block/detail/md4/md4_functions.hpp>
 
namespace nil {
    namespace crypto3 {
        namespace block {
            namespace detail {
                struct md4_policy : md4_functions {
 
                    constexpr static const std::size_t block_bits = 128;
                    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_words = 16;
                    constexpr static const std::size_t key_bits = key_words * word_bits;
                    typedef std::array<word_type, key_words> key_type;
 
                    constexpr static const std::size_t rounds = 48;
                    typedef std::array<unsigned, rounds> key_indexes_type;
 
                    constexpr static const key_indexes_type key_indexes = {{
                        0, 1, 2, 3,  4, 5,  6, 7,  8, 9, 10, 11, 12, 13, 14, 15,
 
                        0, 4, 8, 12, 1, 5,  9, 13, 2, 6, 10, 14, 3,  7,  11, 15,
 
                        0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5,  13, 3,  11, 7,  15,
                    }};
                };
 
                constexpr md4_policy::key_indexes_type const md4_policy::key_indexes;
            }    // namespace detail
        }        // namespace block
    }            // namespace crypto3
}    // namespace nil
 
#endif    // CRYPTO3_BLOCK_CIPHERS_DETAIL_MD4_POLICY_HPP