3 /* nettle, low-level cryptographics library
5 * Copyright (C) 2013 Niels Möller
7 * The nettle library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published by
9 * the Free Software Foundation; either version 2.1 of the License, or (at your
10 * option) any later version.
12 * The nettle library is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 * License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with the nettle library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
23 /* Development of Nettle's ECC support was funded by the .SE Internet Fund. */
33 #include "ecc-internal.h"
34 #include "nettle-internal.h"
37 ecdsa_generate_keypair (struct ecc_point
*pub
,
38 struct ecc_scalar
*key
,
39 void *random_ctx
, nettle_random_func
*random
)
41 TMP_DECL(p
, mp_limb_t
, 3*ECC_MAX_SIZE
+ ECC_MUL_G_ITCH (ECC_MAX_SIZE
));
42 mp_size_t itch
= 3*pub
->ecc
->size
+ ECC_MUL_G_ITCH (pub
->ecc
->size
);
44 assert (key
->ecc
== pub
->ecc
);
48 ecc_modq_random (key
->ecc
, key
->p
, random_ctx
, random
, p
);
49 ecc_mul_g (pub
->ecc
, p
, key
->p
, p
+ 3*pub
->ecc
->size
);
50 ecc_j_to_a (pub
->ecc
, 1, pub
->p
, p
, p
+ 3*pub
->ecc
->size
);