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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
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