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comparison libtommath/bn_mp_dr_setup.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_DR_SETUP_C 2 #ifdef BN_MP_DR_SETUP_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 /* determines the setup value */ 15 /* determines the setup value */
19 void mp_dr_setup(mp_int *a, mp_digit *d) 16 void mp_dr_setup(const mp_int *a, mp_digit *d)
20 { 17 {
21 /* the casts are required if DIGIT_BIT is one less than 18 /* the casts are required if DIGIT_BIT is one less than
22 * the number of bits in a mp_digit [e.g. DIGIT_BIT==31] 19 * the number of bits in a mp_digit [e.g. DIGIT_BIT==31]
23 */ 20 */
24 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) - 21 *d = (mp_digit)(((mp_word)1 << (mp_word)DIGIT_BIT) - (mp_word)a->dp[0]);
25 ((mp_word)a->dp[0]));
26 } 22 }
27 23
28 #endif 24 #endif
29 25
30 /* ref: $Format:%D$ */ 26 /* ref: HEAD -> master, tag: v1.1.0 */
31 /* git commit: $Format:%H$ */ 27 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
32 /* commit time: $Format:%ai$ */ 28 /* commit time: 2019-01-28 20:32:32 +0100 */