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+/**
+ * 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
+ * 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_HASH_SHARED_H__
+#define NRF_CRYPTO_HASH_SHARED_H__
+
+#include "stdint.h"
+#include "stddef.h"
+#include "sdk_errors.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define NRF_CRYPTO_HASH_INIT_VALUE (0x4846526E) //!< Magic value to signal that the nrf_crypto_hash context structure is initialized.
+
+/**@brief Enumeration of supported modes of operation in nrf_crypto_hash
+ */
+typedef enum
+{
+ NRF_CRYPTO_HASH_MODE_SHA256,
+ NRF_CRYPTO_HASH_MODE_SHA512
+} nrf_crypto_hash_mode_t;
+
+
+/**@internal @brief Type declaration to do hash initialization in nrf_crypto backend.
+ *
+ * This is an internal API. See @ref nrf_crypto_hash_init for documentation.
+ */
+typedef ret_code_t (*nrf_crypto_hash_init_fn_t)(void * const p_context);
+
+
+/**@internal @brief Type declaration to do hash update in nrf_crypto backend.
+ *
+ * This is an internal API. See @ref nrf_crypto_hash_init for documentation.
+ */
+typedef ret_code_t (*nrf_crypto_hash_update_fn_t)(void * const p_context,
+ uint8_t const * p_data,
+ size_t size);
+
+
+/**@internal @brief Type declaration to do hash finalize in nrf_crypto backend.
+ *
+ * This is an internal API. See @ref nrf_crypto_hash_finalize for documentation.
+ */
+typedef ret_code_t (*nrf_crypto_hash_finalize_fn_t)(void * const p_context,
+ uint8_t * p_digest,
+ size_t * const p_digest_size);
+
+
+/**@internal @brief Type declaration to for a nrf_crypto_hash info strucure
+ *
+ * @details This structure contains the calling interface and any meta data required
+ * to call the nrf_crypto_hash API functions.
+ */
+typedef struct
+{
+ nrf_crypto_hash_init_fn_t const init_fn; /**< Function pointer to call to initialize nrf_crypto_hash context in backend. */
+ nrf_crypto_hash_update_fn_t const update_fn; /**< Function pointer to call to add data in the hash calculation. */
+ nrf_crypto_hash_finalize_fn_t const finalize_fn; /**< Function pointer to call to finalize the hash calculation and return the result. */
+ size_t const digest_size; /**< Size of the digest. */
+ size_t const context_size; /**< Size of the context type. */
+ nrf_crypto_hash_mode_t const hash_mode; /**< Mode of hash operation. */
+} nrf_crypto_hash_info_t;
+
+
+/**@internal @brief Type declaration of internal representation of a hash context structure.
+ *
+ * @details This is an internal type that should not be used directly.
+ */
+typedef struct
+{
+ uint32_t init_val; /**< Value that is set to NRF_CRYPTO_HASH_INIT_VALUE when context has been initialized. */
+ nrf_crypto_hash_info_t const * p_info; /**< Pointer to an nrf_crypto_hash info structure. */
+
+} nrf_crypto_hash_internal_context_t;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NRF_CRYPTO_HASH_SHARED_H__