lib/nettle/ecc_points.c

   1 /*
   2  * Copyright (C) 2011-2012 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GNUTLS.
   5  *
   6  * The GNUTLS library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation; either version 3 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  18  *
  19  */
  20
  21 /* Based on public domain code of LibTomCrypt by Tom St Denis.
  22  * Adapted to gmp and nettle by Nikos Mavrogiannopoulos.
  23  */
  24
  25 #include "ecc.h"
  26
  27 /*
  28   @file ecc_points.c
  29   ECC Crypto, Tom St Denis
  30 */
  31
  32 /*
  33    Allocate a new ECC point
  34    @return A newly allocated point or NULL on error
  35 */
  36 ecc_point *
  37 ecc_new_point (void)
  38 {
  39   ecc_point *p;
  40   p = calloc (1, sizeof (*p));
  41   if (p == NULL)
  42     {
  43       return NULL;
  44     }
  45   if (mp_init_multi (&p->x, &p->y, &p->z, NULL) != 0)
  46     {
  47       free (p);
  48       return NULL;
  49     }
  50   return p;
  51 }
  52
  53 /* Free an ECC point from memory
  54   @param p   The point to free
  55 */
  56 void
  57 ecc_del_point (ecc_point * p)
  58 {
  59   /* prevents free'ing null arguments */
  60   if (p != NULL)
  61     {
  62       mp_clear_multi (&p->x, &p->y, &p->z, NULL);       /* note: p->z may be NULL but that's ok with this function anyways */
  63       free (p);
  64     }
  65 }
  66
  67 /* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ecc_points.c,v $ */
  68 /* $Revision: 1.7 $ */
  69 /* $Date: 2007/05/12 14:32:35 $ */