Mercurial > dropbear

annotate libtomcrypt/src/pk/ecc/ltc_ecc_points.c @ 1787:ce3ce75a6e04

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Fix null pointer dereference removing listeners
author Matt Johnston <matt@ucc.asn.au>
date Mon, 07 Dec 2020 20:03:24 +0800
parents 6dba84798cd5
children
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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10 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b
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11 *
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12 * All curves taken from NIST recommendation paper of July 1999
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13 * Available at http://csrc.nist.gov/cryptval/dss.htm
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14 */
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15 #include "tomcrypt.h"
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16
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17 /**
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18 @file ltc_ecc_points.c
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19 ECC Crypto, Tom St Denis
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20 */
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21
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22 #ifdef LTC_MECC
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23
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24 /**
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25 Allocate a new ECC point
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26 @return A newly allocated point or NULL on error
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27 */
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28 ecc_point *ltc_ecc_new_point(void)
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29 {
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30 ecc_point *p;
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31 p = XCALLOC(1, sizeof(*p));
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32 if (p == NULL) {
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33 return NULL;
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34 }
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35 if (mp_init_multi(&p->x, &p->y, &p->z, NULL) != CRYPT_OK) {
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36 XFREE(p);
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37 return NULL;
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38 }
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39 return p;
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40 }
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41
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42 /** Free an ECC point from memory
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43 @param p The point to free
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44 */
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45 void ltc_ecc_del_point(ecc_point *p)
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46 {
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47 /* prevents free'ing null arguments */
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48 if (p != NULL) {
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49 mp_clear_multi(p->x, p->y, p->z, NULL); /* note: p->z may be NULL but that's ok with this function anyways */
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50 XFREE(p);
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51 }
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52 }
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53
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54 #endif
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55 /* ref: $Format:%D$ */
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56 /* git commit: $Format:%H$ */
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57 /* commit time: $Format:%ai$ */
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