blob: db63a5577c004511f0b9a97a569e1e501b89f083 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#ifndef CURVE25519_H
#define CURVE25519_H
#include <linux/types.h>
#include <linux/random.h>
enum curve25519_lengths {
CURVE25519_KEY_SIZE = 32
};
void curve25519_generic(u8 out[CURVE25519_KEY_SIZE],
const u8 scalar[CURVE25519_KEY_SIZE],
const u8 point[CURVE25519_KEY_SIZE]);
bool __must_check curve25519(u8 mypublic[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE],
const u8 basepoint[CURVE25519_KEY_SIZE]);
bool __must_check curve25519_generate_public(u8 pub[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE]);
static inline void curve25519_clamp_secret(u8 secret[CURVE25519_KEY_SIZE])
{
secret[0] &= 248;
secret[31] = (secret[31] & 127) | 64;
}
static inline void curve25519_generate_secret(u8 secret[CURVE25519_KEY_SIZE])
{
get_random_bytes_wait(secret, CURVE25519_KEY_SIZE);
curve25519_clamp_secret(secret);
}
#endif /* CURVE25519_H */
|
