1 #include <tommath.h>
2 #ifdef BN_MP_SQRMOD_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
4 *
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
7 *
8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place.
11 *
12 * The library is free for all purposes without any express
13 * guarantee it works.
14 *
15 * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
16 */
17
18 /* c = a * a (mod b) */
19 int
mp_sqrmod(mp_int * a,mp_int * b,mp_int * c)20 mp_sqrmod (mp_int * a, mp_int * b, mp_int * c)
21 {
22 int res;
23 mp_int t;
24
25 if ((res = mp_init (&t)) != MP_OKAY) {
26 return res;
27 }
28
29 if ((res = mp_sqr (a, &t)) != MP_OKAY) {
30 mp_clear (&t);
31 return res;
32 }
33 res = mp_mod (&t, b, c);
34 mp_clear (&t);
35 return res;
36 }
37 #endif
38
39 /* $Source: /cvs/libtom/libtommath/bn_mp_sqrmod.c,v $ */
40 /* $Revision: 1.3 $ */
41 /* $Date: 2006/03/31 14:18:44 $ */
42