/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#include "tomcrypt_private.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;
}