text: /**
   * Copyright (c) 2018 - 2018, Nordic Semiconductor ASA
   * 
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   * 
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   * 
   * 2. Redistributions in binary form, except as embedded into a Nordic
   *    Semiconductor ASA integrated circuit in a product or a software update for
   *    such product, must reproduce the above copyright notice, this list of
   *    conditions and the following disclaimer in the documentation and/or other
   *    materials provided with the distribution.
   * 
   * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   * 
   * 4. This software, with or without modification, must only be used with a
   *    Nordic Semiconductor ASA integrated circuit.
   * 
   * 5. Any software provided in binary form under this license must not be reverse
   *    engineered, decompiled, modified and/or disassembled.
   * 
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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   */
  
  #ifndef NRF_HW_BACKEND_RNG_MBEDTLS_H__
  #define NRF_HW_BACKEND_RNG_MBEDTLS_H__
  
  /** @file
   *
   * @defgroup nrf_crypto_nrf_hw_backend_rng_mbedtls nrf_crypto HW RNG backend using mbedtls CTR-DRBG
   * @{
   * @ingroup nrf_crypto_nrf_hw_backend_rng
   *
   * @brief RNG functionality provided by the nrf_crypto nRF HW RNG backend and mbedtls CTR-DRBG.
   */
  
  #include "sdk_common.h"
  #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG) && \
      NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG_MBEDTLS_CTR_DRBG)
  
  #if !NRF_MODULE_ENABLED(RNG)
  #error Enable RNG_ENABLED in sdk_config.h.
  #endif
  
  #if !NRFX_RNG_CONFIG_ERROR_CORRECTION
  #error Enable NRFX_RNG_CONFIG_ERROR_CORRECTION and RNG_CONFIG_ERROR_CORRECTION in sdk_config.h.
  #endif
  
  /*lint -save -e????*/
  #include "mbedtls/ctr_drbg.h"
  /*lint -restore*/
  #include "nrf_crypto_rng_shared.h"
  
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  #if NRF_MODULE_ENABLED(NRF_CRYPTO_RNG)
  #error "More than one RNG backend enabled."
  #endif // NRF_MODULE_ENABLED(NRF_CRYPTO_RNG)
  #define NRF_CRYPTO_RNG_ENABLED 1
  
  
  /**
   * @internal @brief Context for nRF RNG peripheral with mbed tls CTR-DRBG.
   */
  typedef struct
  {
      nrf_crypto_rng_internal_context_t   header;             //!< Internal common context header.
      mbedtls_ctr_drbg_context            mbedtls_context;    //!< mbed TLS CTR-DRBG context.
  } nrf_crypto_backend_rng_context_t;
  
  /**
   * @internal @brief Dummy temp buffer for nRF RNG peripheral with mbed tls CTR-DRBG.
   */
  typedef struct
  {
      uint32_t reserved;
  } nrf_crypto_backend_rng_temp_buffer_t;
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG_MBEDTLS_CTR_DRBG)
  
  /**@} */
  
  #endif // NRF_HW_BACKEND_RNG_MBEDTLS_H__
  