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comparison libtommath/bn_mp_mulmod.c @ 389:5ff8218bcee9

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propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 2af95f00ebd5bb7a28b3817db1218442c935388e) to branch 'au.asn.ucc.matt.dropbear' (head ecd779509ef23a8cdf64888904fc9b31d78aa933)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 03:14:55 +0000
parents eed26cff980b
children 4fbf9a7556ed
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388:fb54020f78e1 389:5ff8218bcee9
1 #include <tommath.h>
2 #ifdef BN_MP_MULMOD_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.com
16 */
17
18 /* d = a * b (mod c) */
19 int mp_mulmod (mp_int * a, mp_int * b, mp_int * c, mp_int * d)
20 {
21 int res;
22 mp_int t;
23
24 if ((res = mp_init (&t)) != MP_OKAY) {
25 return res;
26 }
27
28 if ((res = mp_mul (a, b, &t)) != MP_OKAY) {
29 mp_clear (&t);
30 return res;
31 }
32 res = mp_mod (&t, c, d);
33 mp_clear (&t);
34 return res;
35 }
36 #endif
37
38 /* $Source: /cvs/libtom/libtommath/bn_mp_mulmod.c,v $ */
39 /* $Revision: 1.4 $ */
40 /* $Date: 2006/03/31 14:18:44 $ */