Mercurial > dropbear
comparison src/misc/crypt/crypt_find_cipher_any.c @ 280:59400faa4b44 libtomcrypt-orig libtomcrypt-1.05
Re-import libtomcrypt 1.05 for cleaner propagating.
From crypt-1.05.tar.bz2, SHA1 of 88250202bb51570dc64f7e8f1c943cda9479258f
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 08 Mar 2006 12:58:00 +0000 |
parents | |
children | d5faf4814ddb |
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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_find_cipher_any.c | |
15 Find a cipher in the descriptor tables, Tom St Denis | |
16 */ | |
17 | |
18 /** | |
19 Find a cipher flexibly. First by name then if not present by block and key size | |
20 @param name The name of the cipher desired | |
21 @param blocklen The minimum length of the block cipher desired (octets) | |
22 @param keylen The minimum length of the key size desired (octets) | |
23 @return >= 0 if found, -1 if not present | |
24 */ | |
25 int find_cipher_any(const char *name, int blocklen, int keylen) | |
26 { | |
27 int x; | |
28 | |
29 LTC_ARGCHK(name != NULL); | |
30 | |
31 x = find_cipher(name); | |
32 if (x != -1) return x; | |
33 | |
34 LTC_MUTEX_LOCK(<c_cipher_mutex); | |
35 for (x = 0; x < TAB_SIZE; x++) { | |
36 if (cipher_descriptor[x].name == NULL) { | |
37 continue; | |
38 } | |
39 if (blocklen <= (int)cipher_descriptor[x].block_length && keylen <= (int)cipher_descriptor[x].max_key_length) { | |
40 LTC_MUTEX_UNLOCK(<c_cipher_mutex); | |
41 return x; | |
42 } | |
43 } | |
44 LTC_MUTEX_UNLOCK(<c_cipher_mutex); | |
45 return -1; | |
46 } | |
47 | |
48 /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_find_cipher_any.c,v $ */ | |
49 /* $Revision: 1.4 $ */ | |
50 /* $Date: 2005/06/19 18:00:28 $ */ |