DES.hpp

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/***************************************************
 *       _   _            _                        *
 *      | | | |          (_)                       *
 *      | |_| | ___  _ __ _ _______  _ __          *
 *      |  _  |/ _ \| '__| |_  / _ \| '_  \        *
 *      | | | | (_) | |  | |/ / (_) | | | |        *
 *      \_| |_/\___/|_|  |_/___\___/|_| |_|        *
 ***************************************************
 * This file is part of Horizon (c).
 * Copyright (c) 2019 Sagun K. (sagunxp@gmail.com).
 * Copyright (c) 2019 Horizon Dev Team.
 *
 * Base Author - Sagun K. (sagunxp@gmail.com)
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 **************************************************/
 
#ifndef HORIZON_LIBRARIES_GRF_DES_HPP
#define HORIZON_LIBRARIES_GRF_DES_HPP
 
#include <cstdint>
#include <cstddef>
 
#define USE_OPENSSL_DES 0
 
#if USE_OPENSSL_DES
#include <openssl/des.h>
#else
 
typedef struct BIT64 { uint8_t b[8]; } BIT64;
#endif
 
class DES
{
public:
#if USE_OPENSSL_DES
    DES(const unsigned char *key);
 
    void decryptBlock(DES_cblock *block);
    void decrypt(unsigned char *data, size_t size);
 
#else
    void decryptBlock(BIT64 *block);
    void decrypt(unsigned char *data, size_t size);
    void roundFunction(BIT64 *src);
    void SBOX(BIT64 *src);
    void E(BIT64* src);
    void TP(BIT64 *src);
    void IP(BIT64 *src);
    void FP(BIT64 *src);
#endif
#if USE_OPENSSL_DES
    DES_key_schedule _schedule;
#endif
};
 
 
#endif // HORIZON_LIBRARIES_GRF_DES_HPP