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annotate libtommath/bn_mp_clear.c @ 1281:eebff2079bdc

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use m_burn for mp_clear
author Matt Johnston <matt@ucc.asn.au>
date Thu, 17 Mar 2016 00:06:26 +0800
parents 5ff8218bcee9
children 3017bc7d6238
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1 #include <tommath.h>
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2 #include "dbutil.h"
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3 #ifdef BN_MP_CLEAR_C
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4 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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5 *
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6 * LibTomMath is a library that provides multiple-precision
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7 * integer arithmetic as well as number theoretic functionality.
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8 *
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9 * The library was designed directly after the MPI library by
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10 * Michael Fromberger but has been written from scratch with
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11 * additional optimizations in place.
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12 *
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13 * The library is free for all purposes without any express
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14 * guarantee it works.
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15 *
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16 * Tom St Denis, [email protected], http://math.libtomcrypt.com
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17 */
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19 /* clear one (frees) */
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20 void
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21 mp_clear (mp_int * a)
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22 {
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23 /* only do anything if a hasn't been freed previously */
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24 if (a->dp != NULL) {
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25 /* first zero the digits */
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26 m_burn(a->dp, a->alloc * sizeof(*a->dp));
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28 /* free ram */
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29 XFREE(a->dp);
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31 /* reset members to make debugging easier */
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32 a->dp = NULL;
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33 a->alloc = a->used = 0;
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34 a->sign = MP_ZPOS;
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35 }
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36 }
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37 #endif
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39 /* $Source: /cvs/libtom/libtommath/bn_mp_clear.c,v $ */
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40 /* $Revision: 1.3 $ */
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41 /* $Date: 2006/03/31 14:18:44 $ */