Mercurial > dropbear
diff libtomcrypt/src/pk/ecc/ecc_get_size.c @ 435:337c45621e81
merge of 'a9b0496634cdd25647b65e585cc3240f3fa699ee'
and 'c22be8b8f570b48e9662dac32c7b3e7148a42206'
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Thu, 22 Feb 2007 14:53:49 +0000 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtomcrypt/src/pk/ecc/ecc_get_size.c Thu Feb 22 14:53:49 2007 +0000 @@ -0,0 +1,44 @@ +/* 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, [email protected], 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 ecc_get_size.c + ECC Crypto, Tom St Denis +*/ + +#ifdef MECC + +/** + Get the size of an ECC key + @param key The key to get the size of + @return The size (octets) of the key or INT_MAX on error +*/ +int ecc_get_size(ecc_key *key) +{ + LTC_ARGCHK(key != NULL); + if (ltc_ecc_is_valid_idx(key->idx)) + return key->dp->size; + else + return INT_MAX; /* large value known to cause it to fail when passed to ecc_make_key() */ +} + +#endif +/* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ecc_get_size.c,v $ */ +/* $Revision: 1.4 $ */ +/* $Date: 2006/11/21 00:10:18 $ */ +