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annotate libtommath/bn_mp_init.c @ 1680:5e763ad6e2e0

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author Matt Johnston <matt@ucc.asn.au>
date Sun, 24 May 2020 13:34:19 +0800
parents f52919ffd3b1
children 1051e4eea25a
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f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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1 #include "tommath_private.h"
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2 #ifdef BN_MP_INIT_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * SPDX-License-Identifier: Unlicense
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13 */
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14
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15 /* init a new mp_int */
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16 int mp_init(mp_int *a)
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17 {
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18 int i;
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20 /* allocate memory required and clear it */
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21 a->dp = OPT_CAST(mp_digit) XMALLOC(sizeof(mp_digit) * (size_t)MP_PREC);
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22 if (a->dp == NULL) {
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23 return MP_MEM;
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24 }
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26 /* set the digits to zero */
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27 for (i = 0; i < MP_PREC; i++) {
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28 a->dp[i] = 0;
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29 }
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31 /* set the used to zero, allocated digits to the default precision
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32 * and sign to positive */
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33 a->used = 0;
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34 a->alloc = MP_PREC;
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35 a->sign = MP_ZPOS;
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37 return MP_OKAY;
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38 }
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39 #endif
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41 /* ref: HEAD -> master, tag: v1.1.0 */
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42 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
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43 /* commit time: 2019-01-28 20:32:32 +0100 */