davies_meyer_compressor.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2020 Mikhail Komarov <nemo@nil.foundation>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
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//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_HASH_DAVIES_MEYER_COMPRESSOR_HPP
#define CRYPTO3_HASH_DAVIES_MEYER_COMPRESSOR_HPP
 
#include <cstddef>
 
namespace nil {
    namespace crypto3 {
        namespace hashes {
            template<typename BlockCipher, typename CombineFunction>
            struct davies_meyer_compressor {
                typedef BlockCipher block_cipher_type;
 
                constexpr static const std::size_t word_bits = block_cipher_type::word_bits;
                typedef typename block_cipher_type::word_type word_type;
 
                constexpr static const std::size_t state_bits = block_cipher_type::block_bits;
                constexpr static const std::size_t state_words = block_cipher_type::block_words;
                typedef typename block_cipher_type::block_type state_type;
 
                constexpr static const std::size_t block_bits = block_cipher_type::key_bits;
                constexpr static const std::size_t block_words = block_cipher_type::key_words;
                typedef typename block_cipher_type::key_type block_type;
 
                inline static void process_block(state_type &state, const block_type &block) {
                    block_cipher_type cipher(block);
                    state_type new_state = cipher.encrypt((const state_type &)state);
                    CombineFunction f;
                    f(state, new_state);
                }
            };
        }    // namespace hashes
    }        // namespace crypto3
}    // namespace nil
 
#endif    // CRYPTO3_HASH_DAVIES_MEYER_COMPRESSOR_HPP