diff options
Diffstat (limited to 'lib/nettle/gost/gost-point-mul-g.c')
-rw-r--r-- | lib/nettle/gost/gost-point-mul-g.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/nettle/gost/gost-point-mul-g.c b/lib/nettle/gost/gost-point-mul-g.c new file mode 100644 index 0000000000..fd6c92dbd2 --- /dev/null +++ b/lib/nettle/gost/gost-point-mul-g.c @@ -0,0 +1,58 @@ +/* ecc-point-mul-g.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 <nettle/ecc.h> +#include "ecc/ecc-internal.h" +#include "ecc-gost-curve.h" + +void +gost_point_mul_g (struct ecc_point *r, const struct ecc_scalar *n) +{ + const struct ecc_curve *ecc = r->ecc; + mp_limb_t size = ecc->p.size; + mp_size_t itch = 3*size + ecc->mul_g_itch; + mp_limb_t *scratch = gmp_alloc_limbs (itch); + + assert (n->ecc == ecc); + assert (ecc->h_to_a_itch <= ecc->mul_g_itch); + + ecc->mul_g (ecc, scratch, n->p, scratch + 3*size); + ecc->h_to_a (ecc, 0, r->p, scratch, scratch + 3*size); + gmp_free_limbs (scratch, itch); +} |