rc4.h

00001 /**
00002  * @file rc4.h
00003  * @brief RC4 encryption algorithm
00004  *
00005  * @section License
00006  *
00007  * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
00008  *
00009  * This file is part of CycloneCrypto Open.
00010  *
00011  * This program is free software; you can redistribute it and/or
00012  * modify it under the terms of the GNU General Public License
00013  * as published by the Free Software Foundation; either version 2
00014  * of the License, or (at your option) any later version.
00015  *
00016  * This program is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  * GNU General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU General Public License
00022  * along with this program; if not, write to the Free Software Foundation,
00023  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00024  *
00025  * @author Oryx Embedded SARL (www.oryx-embedded.com)
00026  * @version 1.7.6
00027  **/
00028 
00029 #ifndef _RC4_H
00030 #define _RC4_H
00031 
00032 //Dependencies
00033 #include "crypto.h"
00034 
00035 //Common interface for encryption algorithms
00036 #define RC4_CIPHER_ALGO (&rc4CipherAlgo)
00037 
00038 
00039 /**
00040  * @brief RC4 algorithm context
00041  **/
00042 
00043 typedef struct
00044 {
00045    uint_t i;
00046    uint_t j;
00047    uint8_t s[256];
00048 } Rc4Context;
00049 
00050 
00051 //RC4 related constants
00052 extern const CipherAlgo rc4CipherAlgo;
00053 
00054 //RC4 related functions
00055 error_t rc4Init(Rc4Context *context, const uint8_t *key, size_t length);
00056 void rc4Cipher(Rc4Context *context, const uint8_t *input, uint8_t *output, size_t length);
00057 
00058 #endif
00059