Mercurial > dropbear

comparison libtomcrypt/src/misc/crypt/crypt_register_cipher.c @ 285:1b9e69c058d2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
parents
children 0cbe8f6dbf9e
comparison
equal deleted inserted replaced
281:997e6f7dc01e 285:1b9e69c058d2
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, [email protected], http://libtomcrypt.org
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file crypt_register_cipher.c
15 Register a cipher, Tom St Denis
16 */
17
18 /**
19 Register a cipher with the descriptor table
20 @param cipher The cipher you wish to register
21 @return value >= 0 if successfully added (or already present), -1 if unsuccessful
22 */
23 int register_cipher(const struct ltc_cipher_descriptor *cipher)
24 {
25 int x;
26
27 LTC_ARGCHK(cipher != NULL);
28
29 /* is it already registered? */
30 LTC_MUTEX_LOCK(&ltc_cipher_mutex);
31 for (x = 0; x < TAB_SIZE; x++) {
32 if (cipher_descriptor[x].name != NULL && cipher_descriptor[x].ID == cipher->ID) {
33 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
34 return x;
35 }
36 }
37
38 /* find a blank spot */
39 for (x = 0; x < TAB_SIZE; x++) {
40 if (cipher_descriptor[x].name == NULL) {
41 XMEMCPY(&cipher_descriptor[x], cipher, sizeof(struct ltc_cipher_descriptor));
42 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
43 return x;
44 }
45 }
46
47 /* no spot */
48 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
49 return -1;
50 }
51
52 /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_register_cipher.c,v $ */
53 /* $Revision: 1.4 $ */
54 /* $Date: 2005/06/19 18:00:28 $ */