Mercurial > dropbear
view src/misc/crypt/crypt_register_prng.c @ 380:d5faf4814ddb libtomcrypt-orig libtomcrypt-1.16
Update to LibTomCrypt 1.16
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Thu, 11 Jan 2007 02:22:00 +0000 |
parents | 59400faa4b44 |
children |
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/* 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 */ #include "tomcrypt.h" /** @file crypt_register_prng.c Register a PRNG, Tom St Denis */ /** Register a PRNG with the descriptor table @param prng The PRNG you wish to register @return value >= 0 if successfully added (or already present), -1 if unsuccessful */ int register_prng(const struct ltc_prng_descriptor *prng) { int x; LTC_ARGCHK(prng != NULL); /* is it already registered? */ LTC_MUTEX_LOCK(<c_prng_mutex); for (x = 0; x < TAB_SIZE; x++) { if (XMEMCMP(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)) == 0) { LTC_MUTEX_UNLOCK(<c_prng_mutex); return x; } } /* find a blank spot */ for (x = 0; x < TAB_SIZE; x++) { if (prng_descriptor[x].name == NULL) { XMEMCPY(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)); LTC_MUTEX_UNLOCK(<c_prng_mutex); return x; } } /* no spot */ LTC_MUTEX_UNLOCK(<c_prng_mutex); return -1; } /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_register_prng.c,v $ */ /* $Revision: 1.7 $ */ /* $Date: 2006/11/01 09:28:17 $ */