1 // SPDX-License-Identifier: BSD-2-Clause
2 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
3  *
4  * LibTomCrypt is a library that provides various cryptographic
5  * algorithms in a highly modular and flexible manner.
6  *
7  * The library is free for all purposes without any express
8  * guarantee it works.
9  */
10 
11 #include "tomcrypt_private.h"
12 
13 /**
14   @file ecc_sizes.c
15   ECC Crypto, Tom St Denis
16 */
17 
18 #ifdef LTC_MECC
19 
ecc_sizes(int * low,int * high)20 void ecc_sizes(int *low, int *high)
21 {
22   int i, size;
23   void *prime;
24 
25   LTC_ARGCHKVD(low  != NULL);
26   LTC_ARGCHKVD(high != NULL);
27 
28   *low = INT_MAX;
29   *high = 0;
30 
31   if (mp_init(&prime) == CRYPT_OK) {
32     for (i = 0; ltc_ecc_curves[i].prime != NULL; i++) {
33        if (mp_read_radix(prime, ltc_ecc_curves[i].prime, 16) == CRYPT_OK) {
34          size = mp_unsigned_bin_size(prime);
35          if (size < *low)  *low  = size;
36          if (size > *high) *high = size;
37        }
38     }
39     mp_clear(prime);
40   }
41 }
42 
43 #endif
44 /* ref:         $Format:%D$ */
45 /* git commit:  $Format:%H$ */
46 /* commit time: $Format:%ai$ */
47 
48