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 *    software without specific prior written permission.
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 * 4. This software, with or without modification, must only be used with a
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#ifndef OBERON_BACKEND_CHACHA_POLY_AEAD_H__
#define OBERON_BACKEND_CHACHA_POLY_AEAD_H__

/** @file
 *
 * @defgroup nrf_crypto_oberon_backend_chacha_poly_aead nrf_crypto Oberon backend CHACHA_POLY AEAD
 * @{
 * @ingroup nrf_crypto_oberon_backend
 *
 * @brief AES AEAD functionality provided by the nrf_crypto Oberon backend.
 */

#include "sdk_config.h"

#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON)

#include "nrf_crypto_aead_shared.h"
#include "occ_chacha20_poly1305.h"
#include "nrf_crypto_error.h"
#include "nrf_crypto_types.h"


#ifdef __cplusplus
extern "C" {
#endif

#define NRF_CRYPTO_OBERON_CHACHA_POLY_BACKEND_KEY_SIZE (32)

/* CHACHA-POLY */
#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_CHACHA_POLY)
#if NRF_MODULE_ENABLED(NRF_CRYPTO_CHACHA_POLY)
#error "Duplicate definition of CHACHA-POLY mode. More than one backend enabled");
#endif
#define NRF_CRYPTO_CHACHA_POLY_ENABLED  1
#undef  NRF_CRYPTO_AEAD_ENABLED
#define NRF_CRYPTO_AEAD_ENABLED  1  // Flag that nrf_crypto_aead frontend can be compiled
#undef  NRF_CRYPTO_OBERON_CHACHA_POLY_AEAD_ENABLED
#define NRF_CRYPTO_OBERON_CHACHA_POLY_AEAD_ENABLED   1   // aead backend for Oberon can be compiled

/* defines for test purposes */
#define NRF_CRYPTO_AES_CHACHA_POLY_256_ENABLED  1

typedef struct
{
    nrf_crypto_aead_internal_context_t header;  /**< Common header for context. */

    uint8_t key[NRF_CRYPTO_OBERON_CHACHA_POLY_BACKEND_KEY_SIZE];
} nrf_crypto_backend_chacha_poly_context_t;
#endif

#ifdef __cplusplus
}
#endif

#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON)

/** @} */

#endif // OBERON_BACKEND_CHACHA_POLY_AEAD_H__

