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
40
41
42
43
44
45
46
47
48
49
50
51
|
/* ecdsa-keygen.c */
/* nettle, low-level cryptographics library
*
* Copyright (C) 2013 Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02111-1301, USA.
*/
/* Development of Nettle's ECC support was funded by the .SE Internet Fund. */
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <stdlib.h>
#include "ecdsa.h"
#include "ecc-internal.h"
#include "nettle-internal.h"
void
ecdsa_generate_keypair (struct ecc_point *pub,
struct ecc_scalar *key,
void *random_ctx, nettle_random_func *random)
{
TMP_DECL(p, mp_limb_t, 3*ECC_MAX_SIZE + ECC_MUL_G_ITCH (ECC_MAX_SIZE));
mp_size_t itch = 3*pub->ecc->size + ECC_MUL_G_ITCH (pub->ecc->size);
assert (key->ecc == pub->ecc);
TMP_ALLOC (p, itch);
ecc_modq_random (key->ecc, key->p, random_ctx, random, p);
ecc_mul_g (pub->ecc, p, key->p, p + 3*pub->ecc->size);
ecc_j_to_a (pub->ecc, 1, pub->p, p, p + 3*pub->ecc->size);
}
|
