#include #ifdef BN_MP_MULMOD_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 */ /* d = a * b (mod c) */ int mp_mulmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d) { int res; mp_int t; if ((res = mp_init_size(&t, c->used)) != MP_OKAY) { return res; } if ((res = mp_mul(a, b, &t)) != MP_OKAY) { mp_clear(&t); return res; } res = mp_mod(&t, c, d); mp_clear(&t); return res; } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */