knx/source/ti/drivers/aesgcm/AESGCMCC26XX.h

/*
 * Copyright (c) 2018, Texas Instruments Incorporated
 * All rights reserved.
 *
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 * *  Redistributions in binary form must reproduce the above copyright
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 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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/** ============================================================================
 *  @file       AESGCMCC26XX.h
 *
 *  @brief      AESGCM driver implementation for the CC26XX family
 *
 * @warning     This is a beta API. It may change in future releases.
 *
 *  This file should only be included in the board file to fill the AESGCM_config
 *  struct.
 *
 *  # Hardware Accelerator #
 *  The CC26XX family has a dedicated hardware crypto accelerator. It is capable
 *  of multiple AES block cipher modes of operation including GCM. Only one operation
 *  can be carried out on the accerator at a time. Mutual exclusion is
 *  implemented at the driver level and coordinated between all drivers relying on
 *  the accelerator. It is transparent to the application and only noted ensure
 *  sensible access timeouts are set.
 *
 *  # Key Store #
 *  The CC26XX crypto module contains a key store. The only way to load a key into
 *  the AES accelerator is to first load it into the key store. To guarantee availability
 *  of open key locations in the key store for AES operations, the last two key
 *  locations (6 and 7) are reserved for ad-hoc operations. The key is loaded into the
 *  key store, the AES operation is carried out, and the key is deleted from the key store.
 *  Since the key store does not have retention and the keys can not survive going into
 *  standby, the key store is only used to load keys into the AES accelerator rather
 *  than store keys. Support for pre-loading keys into the key store and using them
 *  in an AES operation is not supported in this driver.
 *
 *  # Implementation Limitations
 *  - Only plaintext CryptoKeys are supported by this implementation.
 *  - This implementation does not support internal generation of IVs
 *
 *  # Runtime Parameter Validation #
 *  The driver implementation does not perform runtime checks for most input parameters.
 *  Only values that are likely to have a stochastic element to them are checked (such
 *  as whether a driver is already open). Higher input paramter validation coverage is
 *  achieved by turning on assertions when compiling the driver.
 */

#ifndef ti_drivers_aesgcm_AESGCMCC26XX__include
#define ti_drivers_aesgcm_AESGCMCC26XX__include

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stdbool.h>

#include <ti/drivers/Power.h>
#include <ti/drivers/AESGCM.h>
#include <ti/drivers/cryptoutils/cryptokey/CryptoKey.h>

#include <ti/drivers/dpl/HwiP.h>
#include <ti/drivers/dpl/SwiP.h>
#include <ti/drivers/dpl/SemaphoreP.h>

/*!
 *  @brief      AESGCMCC26XX Hardware Attributes
 *
 *  AESGCM26XX hardware attributes should be included in the board file
 *  and pointed to by the AESGCM_config struct.
 */
typedef struct AESGCMCC26XX_HWAttrs {
    /*! @brief Crypto Peripheral's interrupt priority.

        The CC26xx uses three of the priority bits, meaning ~0 has the same effect as (7 << 5).

        (7 << 5) will apply the lowest priority.

        (1 << 5) will apply the highest priority.

        Setting the priority to 0 is not supported by this driver.

        HWI's with priority 0 ignore the HWI dispatcher to support zero-latency interrupts, thus invalidating the critical sections in this driver.
    */
    uint8_t    intPriority;
} AESGCMCC26XX_HWAttrs;

/*!
 *  @brief      AESGCMCC26XX Object
 *
 *  The application must not access any member variables of this structure!
 */
typedef struct AESGCMCC26XX_Object {
    bool                            isOpen;
    bool                            operationInProgress;
    bool                            operationCanceled;
    int_fast16_t                    returnStatus;
    AESGCM_ReturnBehavior           returnBehavior;
    AESGCM_OperationType            operationType;
    uint32_t                        semaphoreTimeout;
    AESGCM_CallbackFxn              callbackFxn;
    AESGCM_Operation                *operation;
} AESGCMCC26XX_Object;

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_aesgcm_AESGCMCC26XX__include */