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comparison libtommath/bn_mp_addmod.c @ 330:5488db2e9e4e

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merge of 332f709a4cb39cde4cedab7c3be89e05f3023067 and ca4ca78b82c5d430c69ce01bf794e8886ce81431
author Matt Johnston <matt@ucc.asn.au>
date Sat, 10 Jun 2006 16:39:40 +0000
parents eed26cff980b
children 5ff8218bcee9
comparison
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329:8ed0dce45126 330:5488db2e9e4e
1 #include <tommath.h>
2 #ifdef BN_MP_ADDMOD_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, [email protected], http://math.libtomcrypt.org
16 */
17
18 /* d = a + b (mod c) */
19 int
20 mp_addmod (mp_int * a, mp_int * b, mp_int * c, mp_int * d)
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_add (a, b, &t)) != MP_OKAY) {
30 mp_clear (&t);
31 return res;
32 }
33 res = mp_mod (&t, c, d);
34 mp_clear (&t);
35 return res;
36 }
37 #endif