crypt_find_prng.c

来自「该压缩包中包括 tom的加密函数库及pdf说明 ,以及Rinick s ECC：」· C语言 代码 · 共 42 行

/* 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.org
 */
#include "tomcrypt.h"

/**
  @file crypt_find_prng.c
  Find a PRNG, Tom St Denis
*/

/**
   Find a registered PRNG by name
   @param name   The name of the PRNG to look for
   @return >= 0 if found, -1 if not present
*/
int find_prng(const char *name)
{
   int x;
   LTC_ARGCHK(name != NULL);
   LTC_MUTEX_LOCK(&ltc_prng_mutex);
   for (x = 0; x < TAB_SIZE; x++) {
       if ((prng_descriptor[x].name != NULL) && strcmp(prng_descriptor[x].name, name) == 0) {
          LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
          return x;
       }
   }
   LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
   return -1;
}


/* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_find_prng.c,v $ */
/* $Revision: 1.4 $ */
/* $Date: 2005/06/19 18:00:28 $ */