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45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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/* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b
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*
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* All curves taken from NIST recommendation paper of July 1999
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* Available at http://csrc.nist.gov/cryptval/dss.htm
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*/
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#include "tomcrypt.h"
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/**
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@file ltc_ecc_is_valid_idx.c
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ECC Crypto, Tom St Denis
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*/
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#ifdef LTC_MECC
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/** Returns whether an ECC idx is valid or not
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@param n The idx number to check
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@return 1 if valid, 0 if not
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*/
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int ltc_ecc_is_valid_idx(int n)
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{
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int x;
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for (x = 0; ltc_ecc_sets[x].size != 0; x++);
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/* -1 is a valid index --- indicating that the domain params were supplied by the user */
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if ((n >= -1) && (n < x)) {
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return 1;
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}
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return 0;
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}
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#endif
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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