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comparison libtommath/bn_mp_submod.c @ 1655:f52919ffd3b1

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update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79) * make key-generation compliant to FIPS 186.4 * fix includes in tommath_class.h * update fuzzcorpus instead of error-out * fixup fuzzing make-targets * update Makefile.in * apply necessary patches to ltm sources * clean-up not required ltm files * update to vanilla ltm 1.1.0 this already only contains the required files * remove set/get double
author Steffen Jaeckel <s_jaeckel@gmx.de>
date Mon, 16 Sep 2019 15:50:38 +0200
parents 8bba51a55704
children 1051e4eea25a
comparison
equal deleted inserted replaced
1654:cc0fc5131c5c 1655:f52919ffd3b1
1 #include <tommath_private.h> 1 #include "tommath_private.h"
2 #ifdef BN_MP_SUBMOD_C 2 #ifdef BN_MP_SUBMOD_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
4 * 4 *
5 * LibTomMath is a library that provides multiple-precision 5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality. 6 * integer arithmetic as well as number theoretic functionality.
7 * 7 *
8 * The library was designed directly after the MPI library by 8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with 9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place. 10 * additional optimizations in place.
11 * 11 *
12 * The library is free for all purposes without any express 12 * SPDX-License-Identifier: Unlicense
13 * guarantee it works.
14 *
15 * Tom St Denis, [email protected], http://libtom.org
16 */ 13 */
17 14
18 /* d = a - b (mod c) */ 15 /* d = a - b (mod c) */
19 int 16 int mp_submod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d)
20 mp_submod (mp_int * a, mp_int * b, mp_int * c, mp_int * d)
21 { 17 {
22 int res; 18 int res;
23 mp_int t; 19 mp_int t;
24 20
25 21
26 if ((res = mp_init (&t)) != MP_OKAY) { 22 if ((res = mp_init(&t)) != MP_OKAY) {
27 return res; 23 return res;
28 } 24 }
29 25
30 if ((res = mp_sub (a, b, &t)) != MP_OKAY) { 26 if ((res = mp_sub(a, b, &t)) != MP_OKAY) {
31 mp_clear (&t); 27 mp_clear(&t);
32 return res; 28 return res;
33 } 29 }
34 res = mp_mod (&t, c, d); 30 res = mp_mod(&t, c, d);
35 mp_clear (&t); 31 mp_clear(&t);
36 return res; 32 return res;
37 } 33 }
38 #endif 34 #endif
39 35
40 /* ref: $Format:%D$ */ 36 /* ref: HEAD -> master, tag: v1.1.0 */
41 /* git commit: $Format:%H$ */ 37 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
42 /* commit time: $Format:%ai$ */ 38 /* commit time: 2019-01-28 20:32:32 +0100 */