diff options
Diffstat (limited to 'lib/nettle/gost/gostdsa-keygen.c')
-rw-r--r-- | lib/nettle/gost/gostdsa-keygen.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/nettle/gost/gostdsa-keygen.c b/lib/nettle/gost/gostdsa-keygen.c new file mode 100644 index 0000000000..fa364be872 --- /dev/null +++ b/lib/nettle/gost/gostdsa-keygen.c @@ -0,0 +1,63 @@ +/* ecdsa-keygen.c + + Copyright (C) 2013 Niels Möller + + This file is part of GNU Nettle. + + GNU Nettle is free software: you can redistribute it and/or + modify it under the terms of either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + + or + + * the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at your + option) any later version. + + or both in parallel, as here. + + GNU Nettle 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 + General Public License for more details. + + You should have received copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see http://www.gnu.org/licenses/. +*/ + +/* 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 <nettle/ecc.h> +#include "ecc/ecc-internal.h" +#include "ecc-gost-curve.h" +#include "nettle-alloca.h" + +void +gostdsa_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)); + const struct ecc_curve *ecc = pub->ecc; + mp_size_t itch = 3*ecc->p.size + ecc->mul_g_itch; + + assert (key->ecc == ecc); + assert (ecc->h_to_a_itch <= ecc->mul_g_itch); + + TMP_ALLOC (p, itch); + + ecc_mod_random (&ecc->q, key->p, random_ctx, random, p); + ecc->mul_g (ecc, p, key->p, p + 3*ecc->p.size); + ecc->h_to_a (ecc, 0, pub->p, p, p + 3*ecc->p.size); +} |