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comparison libtomcrypt/src/pk/ecc/ltc_ecc_is_valid_idx.c @ 1435:f849a5ca2efc

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update to libtomcrypt 1.17 (with Dropbear changes)
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Jun 2017 17:50:50 +0800
parents 0cbe8f6dbf9e
children 6dba84798cd5
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1434:27b9ddb06b09 1435:f849a5ca2efc
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 * 8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com 9 * Tom St Denis, [email protected], http://libtom.org
10 */ 10 */
11 11
12 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b 12 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b
13 * 13 *
14 * All curves taken from NIST recommendation paper of July 1999 14 * All curves taken from NIST recommendation paper of July 1999
19 /** 19 /**
20 @file ltc_ecc_is_valid_idx.c 20 @file ltc_ecc_is_valid_idx.c
21 ECC Crypto, Tom St Denis 21 ECC Crypto, Tom St Denis
22 */ 22 */
23 23
24 #ifdef MECC 24 #ifdef LTC_MECC
25 25
26 /** Returns whether an ECC idx is valid or not 26 /** Returns whether an ECC idx is valid or not
27 @param n The idx number to check 27 @param n The idx number to check
28 @return 1 if valid, 0 if not 28 @return 1 if valid, 0 if not
29 */ 29 */
31 { 31 {
32 int x; 32 int x;
33 33
34 for (x = 0; ltc_ecc_sets[x].size != 0; x++); 34 for (x = 0; ltc_ecc_sets[x].size != 0; x++);
35 /* -1 is a valid index --- indicating that the domain params were supplied by the user */ 35 /* -1 is a valid index --- indicating that the domain params were supplied by the user */
36 if ((n >= -1) || (n < x)) { 36 if ((n >= -1) && (n < x)) {
37 return 1; 37 return 1;
38 } 38 }
39 return 0; 39 return 0;
40 } 40 }
41 41
42 #endif 42 #endif
43 /* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ltc_ecc_is_valid_idx.c,v $ */ 43 /* $Source$ */
44 /* $Revision: 1.4 $ */ 44 /* $Revision$ */
45 /* $Date: 2006/11/21 00:10:18 $ */ 45 /* $Date$ */
46 46