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