des.h
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1 /**
2  * @file des.h
3  * @brief DES (Data Encryption Standard)
4  *
5  * @section License
6  *
7  * Copyright (C) 2010-2018 Oryx Embedded SARL. All rights reserved.
8  *
9  * This file is part of CycloneCrypto Open.
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Public License
13  * as published by the Free Software Foundation; either version 2
14  * of the License, or (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software Foundation,
23  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24  *
25  * @author Oryx Embedded SARL (www.oryx-embedded.com)
26  * @version 1.9.0
27  **/
28 
29 #ifndef _DES_H
30 #define _DES_H
31 
32 //Dependencies
33 #include "core/crypto.h"
34 
35 //DES block size
36 #define DES_BLOCK_SIZE 8
37 //Common interface for encryption algorithms
38 #define DES_CIPHER_ALGO (&desCipherAlgo)
39 
40 //C++ guard
41 #ifdef __cplusplus
42  extern "C" {
43 #endif
44 
45 
46 /**
47  * @brief DES algorithm context
48  **/
49 
50 typedef struct
51 {
52  uint32_t ks[32];
53 } DesContext;
54 
55 
56 //DES related constants
57 extern const CipherAlgo desCipherAlgo;
58 
59 //DES related functions
60 error_t desInit(DesContext *context, const uint8_t *key, size_t keyLen);
61 void desEncryptBlock(DesContext *context, const uint8_t *input, uint8_t *output);
62 void desDecryptBlock(DesContext *context, const uint8_t *input, uint8_t *output);
63 
64 //C++ guard
65 #ifdef __cplusplus
66  }
67 #endif
68 
69 #endif
const CipherAlgo desCipherAlgo
Definition: des.c:247
DES algorithm context.
Definition: des.h:50
General definitions for cryptographic algorithms.
Common interface for encryption algorithms.
Definition: crypto.h:1073
void desEncryptBlock(DesContext *context, const uint8_t *input, uint8_t *output)
Encrypt a 8-byte block using DES algorithm.
Definition: des.c:341
void desDecryptBlock(DesContext *context, const uint8_t *input, uint8_t *output)
Decrypt a 8-byte block using DES algorithm.
Definition: des.c:380
error_t
Error codes.
Definition: error.h:40
error_t desInit(DesContext *context, const uint8_t *key, size_t keyLen)
Initialize a DES context using the supplied key.
Definition: des.c:269