229 lines
7.5 KiB
C
229 lines
7.5 KiB
C
/***************************************************************************//**
|
|
* @file
|
|
* @brief Advanced encryption standard (AES) accelerator peripheral API for
|
|
* EFM32.
|
|
* @author Energy Micro AS
|
|
* @version 2.0.0
|
|
*******************************************************************************
|
|
* @section License
|
|
* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
|
|
*******************************************************************************
|
|
*
|
|
* This source code is the property of Energy Micro AS. The source and compiled
|
|
* code may only be used on Energy Micro "EFM32" microcontrollers.
|
|
*
|
|
* This copyright notice may not be removed from the source code nor changed.
|
|
*
|
|
* 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 __EFM32_AES_H
|
|
#define __EFM32_AES_H
|
|
|
|
#include <stdbool.h>
|
|
#include "efm32.h"
|
|
|
|
#if defined(AES_COUNT) && (AES_COUNT > 0)
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/***************************************************************************//**
|
|
* @addtogroup EFM32_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 EFM32_Library) */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __EFM32_AES_H */
|
|
|
|
#endif /* defined(AES_COUNT) && (AES_COUNT > 0) */
|