Mercurial > dropbear
view libtommath/bn_s_mp_prime_is_divisible.c @ 1692:1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
* update C files
* update other files
* update headers
* update makefiles
* remove mp_set/get_double()
* use ltm 1.2.0 API
* update ltm_desc
* use bundled tommath if system-tommath is too old
* XMALLOC etc. were changed to MP_MALLOC etc.
author | Steffen Jaeckel <s@jaeckel.eu> |
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date | Tue, 26 May 2020 17:36:47 +0200 |
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#include "tommath_private.h" #ifdef BN_S_MP_PRIME_IS_DIVISIBLE_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* determines if an integers is divisible by one * of the first PRIME_SIZE primes or not * * sets result to 0 if not, 1 if yes */ mp_err s_mp_prime_is_divisible(const mp_int *a, mp_bool *result) { int ix; mp_err err; mp_digit res; /* default to not */ *result = MP_NO; for (ix = 0; ix < PRIVATE_MP_PRIME_TAB_SIZE; ix++) { /* what is a mod LBL_prime_tab[ix] */ if ((err = mp_mod_d(a, s_mp_prime_tab[ix], &res)) != MP_OKAY) { return err; } /* is the residue zero? */ if (res == 0u) { *result = MP_YES; return MP_OKAY; } } return MP_OKAY; } #endif