des3.h

00001 /**
00002  * @file des3.h
00003  * @brief Triple DES (Triple Data 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 _DES3_H
00030 #define _DES3_H
00031 
00032 //Dependencies
00033 #include "crypto.h"
00034 #include "des.h"
00035 
00036 //Triple DES block size
00037 #define DES3_BLOCK_SIZE 8
00038 //Common interface for encryption algorithms
00039 #define DES3_CIPHER_ALGO (&des3CipherAlgo)
00040 
00041 
00042 /**
00043  * @brief Triple DES algorithm context
00044  **/
00045 
00046 typedef struct
00047 {
00048    DesContext k1;
00049    DesContext k2;
00050    DesContext k3;
00051 } Des3Context;
00052 
00053 
00054 //Triple DES related constants
00055 extern const CipherAlgo des3CipherAlgo;
00056 
00057 //Triple DES related functions
00058 error_t des3Init(Des3Context *context, const uint8_t *key, size_t keyLength);
00059 void des3EncryptBlock(Des3Context *context, const uint8_t *input, uint8_t *output);
00060 void des3DecryptBlock(Des3Context *context, const uint8_t *input, uint8_t *output);
00061 
00062 #endif
00063