Mercurial > dropbear
annotate libtomcrypt/src/misc/crypt/crypt_find_cipher_any.c @ 522:8cc0598b0b9a maemo
- Split into separate debs
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 18 Nov 2008 12:53:48 +0000 |
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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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12 |
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13 /** |
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14 @file crypt_find_cipher_any.c |
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15 Find a cipher in the descriptor tables, Tom St Denis |
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16 */ |
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17 |
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18 /** |
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19 Find a cipher flexibly. First by name then if not present by block and key size |
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20 @param name The name of the cipher desired |
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21 @param blocklen The minimum length of the block cipher desired (octets) |
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22 @param keylen The minimum length of the key size desired (octets) |
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23 @return >= 0 if found, -1 if not present |
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24 */ |
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25 int find_cipher_any(const char *name, int blocklen, int keylen) |
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26 { |
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27 int x; |
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28 |
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29 LTC_ARGCHK(name != NULL); |
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30 |
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31 x = find_cipher(name); |
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32 if (x != -1) return x; |
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33 |
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34 LTC_MUTEX_LOCK(<c_cipher_mutex); |
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35 for (x = 0; x < TAB_SIZE; x++) { |
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36 if (cipher_descriptor[x].name == NULL) { |
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37 continue; |
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38 } |
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39 if (blocklen <= (int)cipher_descriptor[x].block_length && keylen <= (int)cipher_descriptor[x].max_key_length) { |
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40 LTC_MUTEX_UNLOCK(<c_cipher_mutex); |
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41 return x; |
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42 } |
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43 } |
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44 LTC_MUTEX_UNLOCK(<c_cipher_mutex); |
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45 return -1; |
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46 } |
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47 |
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48 /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_find_cipher_any.c,v $ */ |
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49 /* $Revision: 1.5 $ */ |
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50 /* $Date: 2006/03/31 14:15:35 $ */ |