| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com |
| */ |
| |
| /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b |
| * |
| * All curves taken from NIST recommendation paper of July 1999 |
| * Available at http://csrc.nist.gov/cryptval/dss.htm |
| */ |
| #include "tomcrypt.h" |
| |
| /** |
| @file ltc_ecc_is_valid_idx.c |
| ECC Crypto, Tom St Denis |
| */ |
| |
| #ifdef MECC |
| |
| /** Returns whether an ECC idx is valid or not |
| @param n The idx number to check |
| @return 1 if valid, 0 if not |
| */ |
| int ltc_ecc_is_valid_idx(int n) |
| { |
| int x; |
| |
| for (x = 0; ltc_ecc_sets[x].size != 0; x++); |
| /* -1 is a valid index --- indicating that the domain params were supplied by the user */ |
| if ((n >= -1) || (n < x)) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| #endif |
| /* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ltc_ecc_is_valid_idx.c,v $ */ |
| /* $Revision: 1.4 $ */ |
| /* $Date: 2006/11/21 00:10:18 $ */ |
| |