x25519.h
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1 /**
2  * @file x25519.h
3  * @brief X25519 function implementation
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 _X25519_H
30 #define _X25519_H
31 
32 //Dependencies
33 #include "core/crypto.h"
34 #include "ecc/curve25519.h"
35 
36 //C++ guard
37 #ifdef __cplusplus
38  extern "C" {
39 #endif
40 
41 
42 /**
43  * @brief X25519 working state
44  **/
45 
46 typedef struct
47 {
48  uint32_t k[8];
49  uint32_t u[8];
50  uint32_t x1[8];
51  uint32_t z1[8];
52  uint32_t x2[8];
53  uint32_t z2[8];
54  uint32_t t1[8];
55  uint32_t t2[8];
56 } X25519State;
57 
58 
59 //X25519 related functions
60 error_t x25519(uint8_t *r, const uint8_t *k, const uint8_t *u);
61 
62 //C++ guard
63 #ifdef __cplusplus
64  }
65 #endif
66 
67 #endif
error_t x25519(uint8_t *r, const uint8_t *k, const uint8_t *u)
X25519 function (scalar multiplication on Curve25519)
Definition: x25519.c:51
General definitions for cryptographic algorithms.
Curve25519 elliptic curve (constant-time implementation)
error_t
Error codes.
Definition: error.h:40
uint32_t t2
uint32_t r
Definition: ndp.h:342
uint32_t t1
X25519 working state.
Definition: x25519.h:46