380
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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 |