Mercurial > dropbear

view libtommath/bn_mp_reduce_setup.c @ 1828:3f0ac6bc58a1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
- Remove "flushing" handling for exited processes, it should be handled by normal file descriptor reads. - Fix sesscheckclose() handling if a channel was closed before a process was ever launched
author Matt Johnston <matt@ucc.asn.au>
date Mon, 11 Oct 2021 15:16:54 +0800
parents 1051e4eea25a
children
line wrap: on
line source

#include "tommath_private.h"
#ifdef BN_MP_REDUCE_SETUP_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

/* pre-calculate the value required for Barrett reduction
 * For a given modulus "b" it calulates the value required in "a"
 */
mp_err mp_reduce_setup(mp_int *a, const mp_int *b)
{
   mp_err err;
   if ((err = mp_2expt(a, b->used * 2 * MP_DIGIT_BIT)) != MP_OKAY) {
      return err;
   }
   return mp_div(a, b, a, NULL);
}
#endif