crypt_find_cipher_id.c

在BOOTLOADR中增加当今最好AES加密技术,可用于客户远程更新应用程式

/* 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, [e-mail], http://libtomcrypt.com
 */
#include "tomcrypt.h"

/**
  @file crypt_find_cipher_id.c
  Find cipher by ID, Tom St Denis
*/

/**
   Find a cipher by ID number
   @param ID    The ID (not same as index) of the cipher to find
   @return >= 0 if found, -1 if not present
*/
int find_cipher_id(unsigned char ID)
{
   int x;
   LTC_MUTEX_LOCK(&ltc_cipher_mutex);
   for (x = 0; x < TAB_SIZE; x++) {
       if (cipher_descriptor[x].ID == ID) {
          x = (cipher_descriptor[x].name == NULL) ? -1 : x;
          LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
          return x;
       }
   }
   LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
   return -1;
}

/* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_find_cipher_id.c,v $ */
/* $Revision: 1.5 $ */
/* $Date: 2006/03/31 14:15:35 $ */