libtommath/bn_mp_sqrmod.c
2010-07-15 17:26:06 +02:00

42 lines
915 B
C

#include <tommath.h>
#ifdef BN_MP_SQRMOD_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, tomstdenis@gmail.com, http://libtom.org
*/
/* c = a * a (mod b) */
int
mp_sqrmod (mp_int * a, mp_int * b, mp_int * c)
{
int res;
mp_int t;
if ((res = mp_init (&t)) != MP_OKAY) {
return res;
}
if ((res = mp_sqr (a, &t)) != MP_OKAY) {
mp_clear (&t);
return res;
}
res = mp_mod (&t, b, c);
mp_clear (&t);
return res;
}
#endif
/* $Source$ */
/* $Revision$ */
/* $Date$ */