/**
  ******************************************************************************
  * @file    entropy_hardware_poll.c
  * @author  MCD Application Team
  * @version V1.0.1
  * @date    12-April-2017
  * @brief   This file provides code for the entropy collector.
  ******************************************************************************
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  *
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#include <string.h>
#include "board_init.h"
#include "stm32l4xx_hal.h"

int mbedtls_hardware_poll( void *data, unsigned char *output, size_t len, size_t *olen );



int mbedtls_hardware_poll( void *data,
                    unsigned char *output, size_t len, size_t *olen )
{
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t random_number = 0;
  
  status = HAL_RNG_GenerateRandomNumber(&xHrng, &random_number);
  ((void) data);
  *olen = 0;
  
  if ((len < sizeof(uint32_t)) || (HAL_OK != status))
  {
    return 0;
  }
  
  memcpy(output, &random_number, sizeof(uint32_t));
  *olen = sizeof(uint32_t);
  
  return 0;
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/