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#include "tommath_private.h"
#ifdef BN_MP_SUBMOD_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.
*/
/* d = a - b (mod c) */
int mp_submod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d)
{
int res;
mp_int t;
if ((res = mp_init(&t)) != MP_OKAY) {
return res;
}
if ((res = mp_sub(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: $Format:%ai$ */
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