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eddsa-pubkey.c
60 строк
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Niels Möller
Updated itch macros for ecc point multiplication and signatures
09 ноя 2020, 00:39
09 ноя 2020, 00:39
6d7612d
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/* eddsa-pubkey.c Copyright (C) 2015 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/. */ #if HAVE_CONFIG_H # include "config.h" #endif #include <assert.h> #include "eddsa.h" #include "eddsa-internal.h" #include "ecc-internal.h" mp_size_t _eddsa_public_key_itch (const struct ecc_curve *ecc) { assert (ecc->mul_g_itch <= _eddsa_compress_itch (ecc)); return 3*ecc->p.size + _eddsa_compress_itch (ecc); } void _eddsa_public_key (const struct ecc_curve *ecc, const mp_limb_t *k, uint8_t *pub, mp_limb_t *scratch) { #define P scratch #define scratch_out (scratch + 3*ecc->p.size) ecc->mul_g (ecc, P, k, scratch_out); _eddsa_compress (ecc, pub, P, scratch_out); #undef P #undef scratch_out }