aes.c File Reference

#include "chip.h"
#include "aes.h"

Functions
void	AES_Start (void)
	Starts Manual encryption/decryption process.
void	AES_SoftReset (void)
	Resets the AES. A software triggered hardware reset of the AES interface is performed.
void	AES_Configure (uint32_t mode)
	Configures an AES peripheral with the specified parameters.
void	AES_EnableIt (uint32_t sources)
	Enables the selected interrupts sources on a AES peripheral.
void	AES_DisableIt (uint32_t sources)
	Disables the selected interrupts sources on a AES peripheral.
uint32_t	AES_GetStatus (void)
	Get the current status register of the given AES peripheral.
void	AES_WriteKey (const uint32_t *pKey, uint32_t keyLength)
	Set the 128-bit/192-bit/256-bit cryptographic key used for encryption/decryption.
void	AES_SetInput (const uint32_t *data)
	Set the for 32-bit input Data allow to set the 128-bit data block used for encryption/decryption.
void	AES_GetOutput (uint32_t *data)
	Get the four 32-bit data contain the 128-bit data block which has been encrypted/decrypted.
void	AES_SetVector (const uint32_t *pVector)
	Set four 64-bit initialization vector data block, which is used by some modes of operation as an additional initial input.
void	AES_SetAadLen (uint32_t len)
	Set Length in bytes of the AAD data that is to be processed.
void	AES_SetDataLen (uint32_t len)
	Set Length in bytes of the Length in bytes of the plaintext/ciphertext (C) data that is to be processed..
void	AES_SetGcmHash (uint32_t *hash)
	Set The four 32-bit Hash Word registers expose the intermediate GHASH value. May be read to save the current GHASH value so processing can later be resumed, presumably on a later message fragment. modes of operation as an additional initial input.
void	AES_GetGcmTag (uint32_t *tag)
	Get The four 32-bit Tag which contain the final 128-bit GCM Authentication tag ¡°T¡± when GCM processing is complete.
void	AES_GetGcmCounter (uint32_t *counter)
	Reports the current value of the 32-bit GCM counter.
void	AES_GetGcmH (uint32_t *h)
	Get the four 32-bit data contain the 128-bit H value computed from the KEYW value.

Detailed Description

Implementation of Advanced Encryption Standard (AES)

Function Documentation

AES_Configure()

void AES_Configure

(

uint32_t

mode

)

Configures an AES peripheral with the specified parameters.

Parameters

mode	Desired value for the AES mode register (see the datasheet).

AES_DisableIt()

void AES_DisableIt

(

uint32_t

sources

)

Disables the selected interrupts sources on a AES peripheral.

Parameters

sources

Bitwise OR of selected interrupt sources.

AES_EnableIt()

void AES_EnableIt

(

uint32_t

sources

)

Enables the selected interrupts sources on a AES peripheral.

Parameters

sources

Bitwise OR of selected interrupt sources.

AES_GetGcmCounter()

void AES_GetGcmCounter

(

uint32_t *

counter

)

Reports the current value of the 32-bit GCM counter.

Parameters

counter

Point to value of GCM counter.

AES_GetGcmH()

void AES_GetGcmH

(

uint32_t *

h

)

Get the four 32-bit data contain the 128-bit H value computed from the KEYW value.

Parameters

data	point to the word that has been encrypted/decrypted.

AES_GetGcmTag()

void AES_GetGcmTag

(

uint32_t *

tag

)

Get The four 32-bit Tag which contain the final 128-bit GCM Authentication tag ¡°T¡± when GCM processing is complete.

Parameters

tag	point to the word of the tag.

AES_GetOutput()

void AES_GetOutput

(

uint32_t *

data

)

Get the four 32-bit data contain the 128-bit data block which has been encrypted/decrypted.

Parameters

data	pointer to the word that has been encrypted/decrypted..

AES_GetStatus()

uint32_t AES_GetStatus

(

void

)

Get the current status register of the given AES peripheral.

Returns

AES status register.

AES_SetAadLen()

void AES_SetAadLen

(

uint32_t

len

)

Set Length in bytes of the AAD data that is to be processed.

Parameters

len

Length.

AES_SetDataLen()

void AES_SetDataLen

(

uint32_t

len

)

Set Length in bytes of the Length in bytes of the plaintext/ciphertext (C) data that is to be processed..

Parameters

len

Length.

AES_SetGcmHash()

void AES_SetGcmHash

(

uint32_t *

hash

)

Set The four 32-bit Hash Word registers expose the intermediate GHASH value. May be read to save the current GHASH value so processing can later be resumed, presumably on a later message fragment. modes of operation as an additional initial input.

Parameters

hash	point to the word of the hash.

AES_SetInput()

void AES_SetInput

(

const uint32_t *

data

)

Set the for 32-bit input Data allow to set the 128-bit data block used for encryption/decryption.

Parameters

data	Pointer to the 16-bytes data to cipher/decipher.

AES_SetVector()

void AES_SetVector

(

const uint32_t *

pVector

)

Set four 64-bit initialization vector data block, which is used by some modes of operation as an additional initial input.

Parameters

pVector

point to the word of the initialization vector.

AES_WriteKey()

void AES_WriteKey	(	const uint32_t *	pKey,
		uint32_t	keyLength
	)

Set the 128-bit/192-bit/256-bit cryptographic key used for encryption/decryption.

Parameters

pKey	Pointer to a 16/24/32 bytes cipher key.
keyLength	length of key