Mercurial > dropbear
view libtomcrypt/src/misc/crypt/crypt_register_cipher.c @ 350:01e4180895ba
merge of '9a4e042fd565f46141e81e0c1ab90260303348fe'
and 'bea3887a5875cf3ab8a1331e15e698b37b61fe37'
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Mon, 07 Aug 2006 13:41:23 +0000 |
parents | 1b9e69c058d2 |
children | 0cbe8f6dbf9e |
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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.org */ #include "tomcrypt.h" /** @file crypt_register_cipher.c Register a cipher, Tom St Denis */ /** Register a cipher with the descriptor table @param cipher The cipher you wish to register @return value >= 0 if successfully added (or already present), -1 if unsuccessful */ int register_cipher(const struct ltc_cipher_descriptor *cipher) { int x; LTC_ARGCHK(cipher != NULL); /* is it already registered? */ LTC_MUTEX_LOCK(<c_cipher_mutex); for (x = 0; x < TAB_SIZE; x++) { if (cipher_descriptor[x].name != NULL && cipher_descriptor[x].ID == cipher->ID) { LTC_MUTEX_UNLOCK(<c_cipher_mutex); return x; } } /* find a blank spot */ for (x = 0; x < TAB_SIZE; x++) { if (cipher_descriptor[x].name == NULL) { XMEMCPY(&cipher_descriptor[x], cipher, sizeof(struct ltc_cipher_descriptor)); LTC_MUTEX_UNLOCK(<c_cipher_mutex); return x; } } /* no spot */ LTC_MUTEX_UNLOCK(<c_cipher_mutex); return -1; } /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_register_cipher.c,v $ */ /* $Revision: 1.4 $ */ /* $Date: 2005/06/19 18:00:28 $ */