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/***************************************************************************//**
* @file
* @brief Advanced encryption standard (AES) accelerator peripheral API for
* EFM32.
* @author Energy Micro AS
* @version 3.0.0
*******************************************************************************
* @section License
* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
*******************************************************************************
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
* obligation to support this Software. Energy Micro AS is providing the
* Software "AS IS", with no express or implied warranties of any kind,
* including, but not limited to, any implied warranties of merchantability
* or fitness for any particular purpose or warranties against infringement
* of any proprietary rights of a third party.
*
* Energy Micro AS will not be liable for any consequential, incidental, or
* special damages, or any other relief, or for any claim by any third party,
* arising from your use of this Software.
*
******************************************************************************/
#ifndef __EM_AES_H
#define __EM_AES_H
#include <stdbool.h>
#include "em_part.h"
#if defined(AES_COUNT) && (AES_COUNT > 0)
#ifdef __cplusplus
extern "C" {
#endif
/***************************************************************************//**
* @addtogroup EM_Library
* @{
******************************************************************************/
/***************************************************************************//**
* @addtogroup AES
* @{
******************************************************************************/
/*******************************************************************************
****************************** TYPEDEFS ***********************************
******************************************************************************/
/**
* @brief
* AES counter modification function pointer.
* @details
* Parameters:
* @li ctr - Ptr to byte array (16 bytes) holding counter to be modified.
*/
typedef void (*AES_CtrFuncPtr_TypeDef)(uint8_t *ctr);
/*******************************************************************************
***************************** PROTOTYPES **********************************
******************************************************************************/
void AES_CBC128(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
const uint8_t *iv,
bool encrypt);
void AES_CBC256(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
const uint8_t *iv,
bool encrypt);
void AES_CFB128(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
const uint8_t *iv,
bool encrypt);
void AES_CFB256(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
const uint8_t *iv,
bool encrypt);
void AES_CTR128(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
uint8_t *ctr,
AES_CtrFuncPtr_TypeDef ctrFunc);
void AES_CTR256(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
uint8_t *ctr,
AES_CtrFuncPtr_TypeDef ctrFunc);
void AES_CTRUpdate32Bit(uint8_t *ctr);
void AES_DecryptKey128(uint8_t *out, const uint8_t *in);
void AES_DecryptKey256(uint8_t *out, const uint8_t *in);
void AES_ECB128(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
bool encrypt);
void AES_ECB256(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
bool encrypt);
/***************************************************************************//**
* @brief
* Clear one or more pending AES interrupts.
*
* @param[in] flags
* Pending AES interrupt source to clear. Use a bitwise logic OR combination of
* valid interrupt flags for the AES module (AES_IF_nnn).
******************************************************************************/
__STATIC_INLINE void AES_IntClear(uint32_t flags)
{
AES->IFC = flags;
}
/***************************************************************************//**
* @brief
* Disable one or more AES interrupts.
*
* @param[in] flags
* AES interrupt sources to disable. Use a bitwise logic OR combination of
* valid interrupt flags for the AES module (AES_IF_nnn).
******************************************************************************/
__STATIC_INLINE void AES_IntDisable(uint32_t flags)
{
AES->IEN &= ~(flags);
}
/***************************************************************************//**
* @brief
* Enable one or more AES interrupts.
*
* @note
* Depending on the use, a pending interrupt may already be set prior to
* enabling the interrupt. Consider using AES_IntClear() prior to enabling
* if such a pending interrupt should be ignored.
*
* @param[in] flags
* AES interrupt sources to enable. Use a bitwise logic OR combination of
* valid interrupt flags for the AES module (AES_IF_nnn).
******************************************************************************/
__STATIC_INLINE void AES_IntEnable(uint32_t flags)
{
AES->IEN |= flags;
}
/***************************************************************************//**
* @brief
* Get pending AES interrupt flags.
*
* @note
* The event bits are not cleared by the use of this function.
*
* @return
* AES interrupt sources pending. A bitwise logic OR combination of valid
* interrupt flags for the AES module (AES_IF_nnn).
******************************************************************************/
__STATIC_INLINE uint32_t AES_IntGet(void)
{
return(AES->IF);
}
/***************************************************************************//**
* @brief
* Set one or more pending AES interrupts from SW.
*
* @param[in] flags
* AES interrupt sources to set to pending. Use a bitwise logic OR combination
* of valid interrupt flags for the AES module (AES_IF_nnn).
******************************************************************************/
__STATIC_INLINE void AES_IntSet(uint32_t flags)
{
AES->IFS = flags;
}
void AES_OFB128(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
const uint8_t *iv);
void AES_OFB256(uint8_t *out,
const uint8_t *in,
unsigned int len,
const uint8_t *key,
const uint8_t *iv);
/** @} (end addtogroup AES) */
/** @} (end addtogroup EM_Library) */
#ifdef __cplusplus
}
#endif
#endif /* __EM_AES_H */
#endif /* defined(AES_COUNT) && (AES_COUNT > 0) */
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