Mercurial > dropbear

annotate libtomcrypt/src/misc/crypt/crypt_cipher_is_valid.c @ 752:24172f555f9c

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Fix MAC bug which would prevent asymmetric hashes
author Matt Johnston <matt@ucc.asn.au>
date Wed, 03 Apr 2013 23:54:58 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
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9 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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13 /**
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14 @file crypt_cipher_is_valid.c
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15 Determine if cipher is valid, Tom St Denis
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16 */
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18 /*
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19 Test if a cipher index is valid
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20 @param idx The index of the cipher to search for
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21 @return CRYPT_OK if valid
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22 */
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23 int cipher_is_valid(int idx)
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24 {
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25 LTC_MUTEX_LOCK(&ltc_cipher_mutex);
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26 if (idx < 0 || idx >= TAB_SIZE || cipher_descriptor[idx].name == NULL) {
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27 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
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28 return CRYPT_INVALID_CIPHER;
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29 }
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30 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
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31 return CRYPT_OK;
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32 }
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34 /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_cipher_is_valid.c,v $ */
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35 /* $Revision: 1.5 $ */
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36 /* $Date: 2006/03/31 14:15:35 $ */