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- /**
- *
- * \file
- *
- * \brief SAM Advanced Encryption Standard driver.
- *
- * This file defines a useful set of functions for the AES on SAM devices.
- *
- * Copyright (c) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * 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 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. The name of Atmel may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- * Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
- *
- * \asf_license_stop
- *
- */
- /*
- * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
- */
- #include "aes.h"
- #include "aes_callback.h"
- /** \internal Max number of callback type. */
- #define AES_CALLBACK_TYPE_NUM 2
- /**
- * \internal
- * \brief AES callback function pointer
- */
- aes_callback_t aes_callback_pointer[AES_CALLBACK_TYPE_NUM]={NULL,NULL};
- enum status_code aes_register_callback(
- const aes_callback_t callback,
- const enum aes_callback_type type)
- {
- if (type >= AES_CALLBACK_TYPE_NUM){
- Assert(false);
- return STATUS_ERR_INVALID_ARG;
- }
- aes_callback_pointer[type] = callback;
- return STATUS_OK;
- }
- enum status_code aes_unregister_callback(
- const aes_callback_t callback,
- const enum aes_callback_type type)
- {
- if (type >= AES_CALLBACK_TYPE_NUM){
- Assert(false);
- return STATUS_ERR_INVALID_ARG;
- }
- aes_callback_pointer[type] = NULL;
- return STATUS_OK;
- }
- /**
- * \internal The AES interrupt handler.
- */
- void AES_Handler(void)
- {
- uint32_t status = AES->INTFLAG.reg;
- if (status & AES_INTFLAG_ENCCMP) {
- if (aes_callback_pointer[AES_CALLBACK_ENCRYPTION_COMPLETE]) {
- AES->INTFLAG.reg = AES_INTFLAG_ENCCMP;
- aes_callback_pointer[AES_CALLBACK_ENCRYPTION_COMPLETE]();
- }
- }
- if (status & AES_INTFLAG_GFMCMP) {
- if (aes_callback_pointer[AES_CALLBACK_ENCRYPTION_COMPLETE]) {
- AES->INTFLAG.reg = AES_INTFLAG_GFMCMP;
- aes_callback_pointer[AES_CALLBACK_ENCRYPTION_COMPLETE]();
- }
- }
- }
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