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author | Niels Möller <nisse@lysator.liu.se> | 2013-02-15 09:47:14 +0100 |
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committer | Niels Möller <nisse@lysator.liu.se> | 2013-02-15 09:47:14 +0100 |
commit | 9422a55130ba65f73a053f063efa6226f945b4f1 (patch) | |
tree | c35c54d1a5762aa41ad7fd5b85b32181da0f78a3 /ecc-generic-modp.c | |
parent | 75a1291ed08198f75140bdbb52b317f39e60d4ca (diff) | |
download | nettle-9422a55130ba65f73a053f063efa6226f945b4f1.tar.gz |
Integrated ECC internals.
Diffstat (limited to 'ecc-generic-modp.c')
-rw-r--r-- | ecc-generic-modp.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/ecc-generic-modp.c b/ecc-generic-modp.c new file mode 100644 index 00000000..dd557553 --- /dev/null +++ b/ecc-generic-modp.c @@ -0,0 +1,41 @@ +/* ecc-generic-modp.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-internal.h" + +void +ecc_generic_modp (const struct ecc_curve *ecc, mp_limb_t *rp) +{ + assert (ecc->Bmodp_size < ecc->size); + + ecc_mod (rp, 2*ecc->size, ecc->size, ecc->Bmodp, ecc->Bmodp_size, + ecc->Bmodp_shifted, + ecc->size * GMP_NUMB_BITS - ecc->bit_size); +} |