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comparison libtommath/bn_mp_mulmod.c @ 1692:1051e4eea25a

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Update LibTomMath to 1.2.0 (#84) * update C files * update other files * update headers * update makefiles * remove mp_set/get_double() * use ltm 1.2.0 API * update ltm_desc * use bundled tommath if system-tommath is too old * XMALLOC etc. were changed to MP_MALLOC etc.
author Steffen Jaeckel <s@jaeckel.eu>
date Tue, 26 May 2020 17:36:47 +0200
parents f52919ffd3b1
children
comparison
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1691:2d3745d58843 1692:1051e4eea25a
1 #include "tommath_private.h" 1 #include "tommath_private.h"
2 #ifdef BN_MP_MULMOD_C 2 #ifdef BN_MP_MULMOD_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */
4 * 4 /* SPDX-License-Identifier: Unlicense */
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 * SPDX-License-Identifier: Unlicense
13 */
14 5
15 /* d = a * b (mod c) */ 6 /* d = a * b (mod c) */
16 int mp_mulmod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d) 7 mp_err mp_mulmod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d)
17 { 8 {
18 int res; 9 mp_err err;
19 mp_int t; 10 mp_int t;
20 11
21 if ((res = mp_init_size(&t, c->used)) != MP_OKAY) { 12 if ((err = mp_init_size(&t, c->used)) != MP_OKAY) {
22 return res; 13 return err;
23 } 14 }
24 15
25 if ((res = mp_mul(a, b, &t)) != MP_OKAY) { 16 if ((err = mp_mul(a, b, &t)) != MP_OKAY) {
26 mp_clear(&t); 17 goto LBL_ERR;
27 return res;
28 } 18 }
29 res = mp_mod(&t, c, d); 19 err = mp_mod(&t, c, d);
20
21 LBL_ERR:
30 mp_clear(&t); 22 mp_clear(&t);
31 return res; 23 return err;
32 } 24 }
33 #endif 25 #endif
34
35 /* ref: HEAD -> master, tag: v1.1.0 */
36 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
37 /* commit time: 2019-01-28 20:32:32 +0100 */