Mercurial > dropbear

annotate libtomcrypt/src/pk/ecc/ltc_ecc_points.c @ 611:870c63519757

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Change comparison to be more paranoid (and perhaps avoid Klocwork false positive). Does not change behaviour.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 07 Apr 2011 11:18:35 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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382
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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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9 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11
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12 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b
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13 *
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14 * All curves taken from NIST recommendation paper of July 1999
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15 * Available at http://csrc.nist.gov/cryptval/dss.htm
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16 */
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17 #include "tomcrypt.h"
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18
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19 /**
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20 @file ltc_ecc_points.c
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21 ECC Crypto, Tom St Denis
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22 */
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23
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24 #ifdef MECC
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25
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26 /**
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27 Allocate a new ECC point
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28 @return A newly allocated point or NULL on error
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29 */
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30 ecc_point *ltc_ecc_new_point(void)
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31 {
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32 ecc_point *p;
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33 p = XCALLOC(1, sizeof(*p));
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34 if (p == NULL) {
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35 return NULL;
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36 }
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37 if (mp_init_multi(&p->x, &p->y, &p->z, NULL) != CRYPT_OK) {
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38 XFREE(p);
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39 return NULL;
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40 }
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41 return p;
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42 }
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43
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44 /** Free an ECC point from memory
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45 @param p The point to free
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46 */
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47 void ltc_ecc_del_point(ecc_point *p)
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48 {
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49 /* prevents free'ing null arguments */
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50 if (p != NULL) {
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51 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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52 XFREE(p);
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53 }
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54 }
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55
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56 #endif
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57 /* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ltc_ecc_points.c,v $ */
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58 /* $Revision: 1.5 $ */
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59 /* $Date: 2006/12/04 02:19:48 $ */
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60