229 lines
7.5 KiB
C
229 lines
7.5 KiB
C
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/***************************************************************************//**
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* @file
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* @brief Advanced encryption standard (AES) accelerator peripheral API for
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* EFM32.
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* @author Energy Micro AS
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* @version 1.3.0
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* This source code is the property of Energy Micro AS. The source and compiled
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* code may only be used on Energy Micro "EFM32" microcontrollers.
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*
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* This copyright notice may not be removed from the source code nor changed.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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******************************************************************************/
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#ifndef __EFM32_AES_H
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#define __EFM32_AES_H
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#include <stdbool.h>
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#include "efm32.h"
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#if defined(AES_COUNT) && (AES_COUNT > 0)
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***************************************************************************//**
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* @addtogroup EFM32_Library
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup AES
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* @{
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******************************************************************************/
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/*******************************************************************************
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****************************** TYPEDEFS ***********************************
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******************************************************************************/
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/**
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* @brief
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* AES counter modification function pointer.
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* @details
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* Parameters:
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* @li ctr - Ptr to byte array (16 bytes) holding counter to be modified.
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*/
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typedef void (*AES_CtrFuncPtr_TypeDef)(uint8_t *ctr);
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/*******************************************************************************
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***************************** PROTOTYPES **********************************
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******************************************************************************/
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void AES_CBC128(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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const uint8_t *iv,
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bool encrypt);
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void AES_CBC256(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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const uint8_t *iv,
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bool encrypt);
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void AES_CFB128(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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const uint8_t *iv,
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bool encrypt);
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void AES_CFB256(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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const uint8_t *iv,
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bool encrypt);
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void AES_CTR128(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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uint8_t *ctr,
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AES_CtrFuncPtr_TypeDef ctrFunc);
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void AES_CTR256(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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uint8_t *ctr,
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AES_CtrFuncPtr_TypeDef ctrFunc);
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void AES_CTRUpdate32Bit(uint8_t *ctr);
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void AES_DecryptKey128(uint8_t *out, const uint8_t *in);
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void AES_DecryptKey256(uint8_t *out, const uint8_t *in);
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void AES_ECB128(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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bool encrypt);
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void AES_ECB256(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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bool encrypt);
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/***************************************************************************//**
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* @brief
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* Clear one or more pending AES interrupts.
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*
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* @param[in] flags
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* Pending AES interrupt source to clear. Use a logical OR combination of
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* valid interrupt flags for the AES module (AES_IF_nnn).
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******************************************************************************/
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static __INLINE void AES_IntClear(uint32_t flags)
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{
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AES->IFC = flags;
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}
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/***************************************************************************//**
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* @brief
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* Disable one or more AES interrupts.
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*
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* @param[in] flags
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* AES interrupt sources to disable. Use a logical OR combination of
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* valid interrupt flags for the AES module (AES_IF_nnn).
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******************************************************************************/
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static __INLINE void AES_IntDisable(uint32_t flags)
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{
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AES->IEN &= ~(flags);
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}
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/***************************************************************************//**
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* @brief
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* Enable one or more AES interrupts.
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*
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* @note
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* Depending on the use, a pending interrupt may already be set prior to
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* enabling the interrupt. Consider using AES_IntClear() prior to enabling
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* if such a pending interrupt should be ignored.
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*
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* @param[in] flags
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* AES interrupt sources to enable. Use a logical OR combination of
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* valid interrupt flags for the AES module (AES_IF_nnn).
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******************************************************************************/
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static __INLINE void AES_IntEnable(uint32_t flags)
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{
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AES->IEN |= flags;
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}
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/***************************************************************************//**
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* @brief
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* Get pending AES interrupt flags.
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*
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* @note
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* The event bits are not cleared by the use of this function.
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*
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* @return
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* AES interrupt sources pending. A logical OR combination of valid
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* interrupt flags for the AES module (AES_IF_nnn).
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******************************************************************************/
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static __INLINE uint32_t AES_IntGet(void)
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{
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return(AES->IF);
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}
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/***************************************************************************//**
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* @brief
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* Set one or more pending AES interrupts from SW.
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*
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* @param[in] flags
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* AES interrupt sources to set to pending. Use a logical OR combination of
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* valid interrupt flags for the AES module (AES_IF_nnn).
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******************************************************************************/
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static __INLINE void AES_IntSet(uint32_t flags)
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{
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AES->IFS = flags;
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}
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void AES_OFB128(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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const uint8_t *iv);
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void AES_OFB256(uint8_t *out,
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const uint8_t *in,
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unsigned int len,
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const uint8_t *key,
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const uint8_t *iv);
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/** @} (end addtogroup AES) */
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/** @} (end addtogroup EFM32_Library) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __EFM32_AES_H */
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#endif /* defined(AES_COUNT) && (AES_COUNT > 0) */
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