#include #ifdef BN_MP_PRIME_IS_DIVISIBLE_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision * integer arithmetic as well as number theoretic functionality. * * The library was designed directly after the MPI library by * Michael Fromberger but has been written from scratch with * additional optimizations in place. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tstdenis82@gmail.com, http://libtom.org */ /* 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 */ int mp_prime_is_divisible (mp_int * a, int *result) { int err, ix; mp_digit res; /* default to not */ *result = MP_NO; for (ix = 0; ix < PRIME_SIZE; ix++) { /* what is a mod LBL_prime_tab[ix] */ if ((err = mp_mod_d (a, ltm_prime_tab[ix], &res)) != MP_OKAY) { return err; } /* is the residue zero? */ if (res == 0) { *result = MP_YES; return MP_OKAY; } } return MP_OKAY; } #endif /* ref: tag: v1.0.1, master */ /* git commit: 5953f62e42b24af93748b1ee5e1d062e242c2546 */ /* commit time: 2017-08-29 22:27:36 +0200 */