Commit 2d796c6e authored by Niels Möller's avatar Niels Möller

Implemented ecc_point_mul and ecc_point_mul_g.

parent c44b8d2e
2013-04-03 Niels Möller <nisse@lysator.liu.se>
* ecc-point-mul-g.c (ecc_point_mul_g): New file and function.
* ecc-point-mul.c (ecc_point_mul): New file and function.
* ecc.h: Updated declarations and name mangling.
* Makefile.in (hogweed_SOURCES): Added ecc-point-mul.c and
ecc-point-mul-g.c.
* testsuite/salsa20-test.c (test_main): Tests for salsa20r12,
contributed by Nikos Mavrogiannopoulos.
......
......@@ -133,7 +133,7 @@ hogweed_SOURCES = sexp.c sexp-format.c \
ecc-size.c ecc-j-to-a.c ecc-a-to-j.c \
ecc-dup-jj.c ecc-add-jja.c ecc-add-jjj.c \
ecc-mul-g.c ecc-mul-a.c ecc-hash.c ecc-random.c \
ecc-point.c ecc-scalar.c \
ecc-point.c ecc-scalar.c ecc-point-mul.c ecc-point-mul-g.c \
ecc-ecdsa-sign.c ecdsa-sign.c \
ecc-ecdsa-verify.c ecdsa-verify.c ecdsa-keygen.c
......
/* ecc-point-mul-g.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 Internetfonden. */
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include "ecc.h"
#include "ecc-internal.h"
#include "gmp-glue.h"
#include "nettle-internal.h"
void
ecc_point_mul_g (struct ecc_point *r, const struct ecc_scalar *n)
{
TMP_DECL(scratch, mp_limb_t, 3*ECC_MAX_SIZE + ECC_MUL_G_ITCH (ECC_MAX_SIZE));
mp_limb_t size = r->ecc->size;
mp_size_t itch = 3*size + ECC_MUL_G_ITCH (size);
assert (r->ecc == n->ecc);
TMP_ALLOC (scratch, itch);
ecc_mul_g (r->ecc, scratch, n->p, scratch + 3*size);
ecc_j_to_a (r->ecc, 1, r->p, scratch, scratch + 3*size);
}
/* ecc-point-mul.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 Internetfonden. */
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include "ecc.h"
#include "ecc-internal.h"
#include "gmp-glue.h"
void
ecc_point_mul (struct ecc_point *r, const struct ecc_scalar *n,
const struct ecc_point *p)
{
mp_limb_t size = p->ecc->size;
mp_size_t itch = 3*size + ECC_MUL_A_ITCH (size);
mp_limb_t *scratch = gmp_alloc_limbs (itch);
assert (n->ecc == p->ecc);
assert (r->ecc == p->ecc);
ecc_mul_a (p->ecc, 1, scratch, n->p, p->p, scratch + 3*size);
ecc_j_to_a (r->ecc, 1, r->p, scratch, scratch + 3*size);
gmp_free_limbs (scratch, itch);
}
......@@ -38,6 +38,8 @@ extern "C" {
#define ecc_point_clear nettle_ecc_point_clear
#define ecc_point_set nettle_ecc_point_set
#define ecc_point_get nettle_ecc_point_get
#define ecc_point_mul nettle_ecc_point_mul
#define ecc_point_mul_g nettle_ecc_point_mul_g
#define ecc_scalar_init nettle_ecc_scalar_init
#define ecc_scalar_clear nettle_ecc_scalar_clear
#define ecc_scalar_set nettle_ecc_scalar_set
......@@ -118,6 +120,10 @@ void
ecc_point_mul (struct ecc_point *r, const struct ecc_scalar *n,
const struct ecc_point *p);
/* Computes r = n g */
void
ecc_point_mul_g (struct ecc_point *r, const struct ecc_scalar *n);
/* Low-level interface */
......
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