x25519.h
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1 /**
2  * @file x25519.h
3  * @brief X25519 function implementation
4  *
5  * @section License
6  *
7  * SPDX-License-Identifier: GPL-2.0-or-later
8  *
9  * Copyright (C) 2010-2020 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 1.9.8
29  **/
30 
31 #ifndef _X25519_H
32 #define _X25519_H
33 
34 //Dependencies
35 #include "core/crypto.h"
36 #include "ecc/curve25519.h"
37 
38 //C++ guard
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42 
43 
44 /**
45  * @brief X25519 working state
46  **/
47 
48 typedef struct
49 {
50  uint32_t k[8];
51  uint32_t u[8];
52  uint32_t x1[8];
53  uint32_t z1[8];
54  uint32_t x2[8];
55  uint32_t z2[8];
56  uint32_t t1[8];
57  uint32_t t2[8];
58 } X25519State;
59 
60 
61 //X25519 related functions
62 error_t x25519(uint8_t *r, const uint8_t *k, const uint8_t *u);
63 
64 //C++ guard
65 #ifdef __cplusplus
66 }
67 #endif
68 
69 #endif
uint32_t r
Definition: ndp.h:345
error_t x25519(uint8_t *r, const uint8_t *k, const uint8_t *u)
X25519 function (scalar multiplication on Curve25519)
Definition: x25519.c:53
error_t
Error codes.
Definition: error.h:42
General definitions for cryptographic algorithms.
uint32_t t2
uint32_t t1
Curve25519 elliptic curve (constant-time implementation)
X25519 working state.
Definition: x25519.h:48