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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
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*/
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#include "tomcrypt.h"
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/**
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@file crypt_find_cipher_any.c
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Find a cipher in the descriptor tables, Tom St Denis
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*/
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/**
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Find a cipher flexibly. First by name then if not present by block and key size
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@param name The name of the cipher desired
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@param blocklen The minimum length of the block cipher desired (octets)
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@param keylen The minimum length of the key size desired (octets)
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@return >= 0 if found, -1 if not present
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*/
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int find_cipher_any(const char *name, int blocklen, int keylen)
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{
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int x;
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LTC_ARGCHK(name != NULL);
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x = find_cipher(name);
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if (x != -1) return x;
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LTC_MUTEX_LOCK(<c_cipher_mutex);
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for (x = 0; x < TAB_SIZE; x++) {
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if (cipher_descriptor[x].name == NULL) {
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continue;
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}
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if (blocklen <= (int)cipher_descriptor[x].block_length && keylen <= (int)cipher_descriptor[x].max_key_length) {
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LTC_MUTEX_UNLOCK(<c_cipher_mutex);
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return x;
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}
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}
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LTC_MUTEX_UNLOCK(<c_cipher_mutex);
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return -1;
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}
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/* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_find_cipher_any.c,v $ */
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/* $Revision: 1.5 $ */
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/* $Date: 2006/03/31 14:15:35 $ */
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