/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright 2018 Danny Robson <danny@nerdcruft.net>
 */

#pragma once

#include <cstddef>
#include <array>

#include <cruft/util/std.hpp>
#include <cruft/util/view.hpp>

namespace cruft::crypto::block {
    /// An implementation of the RC2 block cipher (RFC2268)
    class rc2 {
    public:
        using word_t = u16;
        static constexpr auto block_size = sizeof (word_t) * 4;

        explicit rc2 (cruft::view<u16 const*> key);

        std::array<word_t,4> encrypt (std::array<word_t,4> src) const;
        std::array<word_t,4> decrypt (std::array<word_t,4> src) const;

    private:
        std::array<u16,64> m_key;
    };
}