| /* 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, tomstdenis@gmail.com, 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 $ */ |