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/* bignum.c
Bignum operations that are missing from gmp.
Copyright (C) 2001 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 https://www.gnu.org/licenses/.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <gnutls_int.h>
#include <string.h>
#include <nettle/bignum.h>
#include "bignum-le.h"
void nettle_mpz_get_str_256_u_le(size_t length, uint8_t * s, const mpz_t x)
{
if (!length) {
/* x must be zero */
assert(!mpz_sgn(x));
return;
}
size_t count;
assert(nettle_mpz_sizeinbase_256_u(x) <= length);
mpz_export(s, &count, -1, 1, 0, 0, x);
memset(s + count, 0, length - count);
}
#define nettle_mpz_from_octets_le(x, length, s) \
mpz_import((x), (length), -1, 1, 0, 0, (s))
void nettle_mpz_set_str_256_u_le(mpz_t x, size_t length, const uint8_t * s)
{
nettle_mpz_from_octets_le(x, length, s);
}
void nettle_mpz_init_set_str_256_u_le(mpz_t x, size_t length, const uint8_t * s)
{
mpz_init(x);
nettle_mpz_from_octets_le(x, length, s);
}
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