1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis 2 * 3 * LibTomCrypt is a library that provides various cryptographic 4 * algorithms in a highly modular and flexible manner. 5 * 6 * The library is free for all purposes without any express 7 * guarantee it works. 8 * 9 * Tom St Denis, tomstdenis (at) gmail.com, http://libtomcrypt.com 10 */ 11 12 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b 13 * 14 * All curves taken from NIST recommendation paper of July 1999 15 * Available at http://csrc.nist.gov/cryptval/dss.htm 16 */ 17 #include "tomcrypt.h" 18 19 /** 20 @file ecc_get_size.c 21 ECC Crypto, Tom St Denis 22 */ 23 24 #ifdef MECC 25 26 /** 27 Get the size of an ECC key 28 @param key The key to get the size of 29 @return The size (octets) of the key or INT_MAX on error 30 */ 31 int ecc_get_size(ecc_key *key) 32 { 33 LTC_ARGCHK(key != NULL); 34 if (ltc_ecc_is_valid_idx(key->idx)) 35 return key->dp->size; 36 else 37 return INT_MAX; /* large value known to cause it to fail when passed to ecc_make_key() */ 38 } 39 40 #endif 41 /* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ecc_get_size.c,v $ */ 42 /* $Revision: 1.4 $ */ 43 /* $Date: 2006/11/21 00:10:18 $ */ 44 45
