des.h
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1 /**
2  * @file des.h
3  * @brief DES (Data Encryption Standard)
4  *
5  * @section License
6  *
7  * SPDX-License-Identifier: GPL-2.0-or-later
8  *
9  * Copyright (C) 2010-2019 Oryx Embedded SARL. All rights reserved.
10  *
11  * This file is part of CycloneCrypto Open.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License
15  * as published by the Free Software Foundation; either version 2
16  * of the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software Foundation,
25  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26  *
27  * @author Oryx Embedded SARL (www.oryx-embedded.com)
28  * @version 1.9.6
29  **/
30 
31 #ifndef _DES_H
32 #define _DES_H
33 
34 //Dependencies
35 #include "core/crypto.h"
36 
37 //DES block size
38 #define DES_BLOCK_SIZE 8
39 //Common interface for encryption algorithms
40 #define DES_CIPHER_ALGO (&desCipherAlgo)
41 
42 //C++ guard
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46 
47 
48 /**
49  * @brief DES algorithm context
50  **/
51 
52 typedef struct
53 {
54  uint32_t ks[32];
55 } DesContext;
56 
57 
58 //DES related constants
59 extern const CipherAlgo desCipherAlgo;
60 
61 //DES related functions
62 error_t desInit(DesContext *context, const uint8_t *key, size_t keyLen);
63 void desEncryptBlock(DesContext *context, const uint8_t *input, uint8_t *output);
64 void desDecryptBlock(DesContext *context, const uint8_t *input, uint8_t *output);
65 
66 //C++ guard
67 #ifdef __cplusplus
68 }
69 #endif
70 
71 #endif
error_t desInit(DesContext *context, const uint8_t *key, size_t keyLen)
Initialize a DES context using the supplied key.
Definition: des.c:271
DES algorithm context.
Definition: des.h:52
error_t
Error codes.
Definition: error.h:42
General definitions for cryptographic algorithms.
const CipherAlgo desCipherAlgo
Definition: des.c:249
void desEncryptBlock(DesContext *context, const uint8_t *input, uint8_t *output)
Encrypt a 8-byte block using DES algorithm.
Definition: des.c:347
Common interface for encryption algorithms.
Definition: crypto.h:1150
void desDecryptBlock(DesContext *context, const uint8_t *input, uint8_t *output)
Decrypt a 8-byte block using DES algorithm.
Definition: des.c:386