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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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