owner-nrf52sdk/nRF5_SDK_17.0.2/components/libraries/crypto/nrf_crypto_hmac_backend.h

/**
 * Copyright (c) 2018 - 2020, 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
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef NRF_CRYPTO_HMAC_BACKEND_H__
#define NRF_CRYPTO_HMAC_BACKEND_H__

/** @file
 *
 * @defgroup nrf_crypto_hmac_backend Meta backend.
 * @{
 * @ingroup nrf_crypto_hmac
 *
 * @brief Includes all backends definitions.
 *
 * @details This file includes all backend definitions, and provide a dummy context in case no
 * backend is enabled. This is needed so that any project including HMAC headers will still
 * compile when HMAC is not used/enabled.
 */

#include "sdk_common.h"
#include "nrf_crypto_hmac_shared.h"
#include "mbedtls_backend_hmac.h"
#include "cc310_backend_hmac.h"
#include "oberon_backend_hmac.h"

#ifdef __cplusplus
extern "C" {
#endif


#ifndef NRF_CRYPTO_HMAC_SHA256_ENABLED
// /** @internal @brief Fallback context type for HMAC SHA256 in case no backend is selected. */
typedef nrf_crypto_hmac_internal_context_t nrf_crypto_backend_hmac_sha256_context_t;
#endif // #ifndef NRF_CRYPTO_HMAC_SHA256_ENABLED

#ifndef NRF_CRYPTO_HMAC_SHA512_ENABLED
/** @internal @brief Fallback context type for HMAC SHA512 in case no backend is selected. */
typedef nrf_crypto_hmac_internal_context_t nrf_crypto_backend_hmac_sha512_context_t;
#endif // #ifndef NRF_CRYPTO_HMAC_SHA512_ENABLED


/** @internal @brief Union holding a HMAC context. */
typedef union
{
    nrf_crypto_backend_hmac_sha256_context_t hmac_sha256_context;   /**< @brief Holds context for HMAC SHA-256. */
    nrf_crypto_backend_hmac_sha512_context_t hmac_sha512_context;   /**< @brief Holds context for HMAC SHA-512. */
} nrf_crypto_backend_hmac_context_t;


#ifdef __cplusplus
}
#endif

/**@} */

#endif // NRF_CRYPTO_HMAC_BACKEND_H__