view libtomcrypt/src/misc/crypt/crypt_prng_is_valid.c @ 297:79bf1023cf11 agent-client

propagate from branch 'au.asn.ucc.matt.dropbear' (head 0501e6f661b5415eb76f3b312d183c3adfbfb712) to branch 'au.asn.ucc.matt.dropbear.cli-agent' (head 01038174ec27245b51bd43a66c01ad930880f67b)
author Matt Johnston <matt@ucc.asn.au>
date Tue, 21 Mar 2006 16:20:59 +0000
parents 1b9e69c058d2
children 0cbe8f6dbf9e
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/* 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, [email protected], http://libtomcrypt.org
 */
#include "tomcrypt.h"

/**
  @file crypt_prng_is_valid.c
  Determine if PRNG is valid, Tom St Denis
*/

/*
   Test if a PRNG index is valid
   @param idx   The index of the PRNG to search for
   @return CRYPT_OK if valid
*/
int prng_is_valid(int idx)
{
   LTC_MUTEX_LOCK(&ltc_prng_mutex);
   if (idx < 0 || idx >= TAB_SIZE || prng_descriptor[idx].name == NULL) {
      LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
      return CRYPT_INVALID_PRNG;
   }
   LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
   return CRYPT_OK;
}

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