The extended feature set of at86rf2xx transceivers comprises a hardware implementation of AES. More...

Detailed Description

The extended feature set of at86rf2xx transceivers comprises a hardware implementation of AES.

There are two supported block cipher modes, ECB and CBC.

Interface of the at86rf2xx security module (AES)

Author: Fabian Hüßler fabia.nosp@m.n.hu.nosp@m.essle.nosp@m.r@ov.nosp@m.gu.de

Definition in file at86rf2xx_aes.h.

#include "at86rf2xx.h"

Include dependency graph for at86rf2xx_aes.h:

Go to the source code of this file.

Typedefs
typedef uint8_t	aes_block_t[AT86RF2XX_AES_BLOCK_SIZE]
	An AES block.

Functions
void	at86rf2xx_aes_key_read_encrypt (at86rf2xx_t *dev, uint8_t key[AT86RF2XX_AES_KEY_LENGTH])
	Read the AES key used for encryption.

void	at86rf2xx_aes_key_write_encrypt (at86rf2xx_t *dev, const uint8_t key[AT86RF2XX_AES_KEY_LENGTH])
	Write the AES key used for encryption.

void	at86rf2xx_aes_key_read_decrypt (at86rf2xx_t *dev, uint8_t key[AT86RF2XX_AES_KEY_LENGTH])
	Read the AES key used for decryption.

void	at86rf2xx_aes_key_write_decrypt (at86rf2xx_t *dev, const uint8_t key[AT86RF2XX_AES_KEY_LENGTH])
	Write the AES key used for decryption.

void	at86rf2xx_aes_ecb_encrypt (at86rf2xx_t dev, aes_block_t cipher, uint8_t key[AT86RF2XX_AES_BLOCK_SIZE], const aes_block_t *plain, uint8_t nblocks)
	Perform AES algorithm and encrypt data blocks in `plain` to cipher data blocks, using ECB mode.

void	at86rf2xx_aes_ecb_decrypt (at86rf2xx_t dev, aes_block_t plain, uint8_t key[AT86RF2XX_AES_BLOCK_SIZE], const aes_block_t *cipher, uint8_t nblocks)
	Perform AES algorithm and decrypt data blocks in `cipher` to plain data blocks, using ECB mode.

void	at86rf2xx_aes_cbc_encrypt (at86rf2xx_t dev, aes_block_t cipher, uint8_t key[AT86RF2XX_AES_BLOCK_SIZE], uint8_t iv[AT86RF2XX_AES_BLOCK_SIZE], const aes_block_t *plain, uint8_t nblocks)
	Perform AES algorithm and encrypt data blocks in `plain` to cipher data blocks, using CBC mode.

void	at86rf2xx_aes_cbc_decrypt (at86rf2xx_t dev, aes_block_t plain, uint8_t key[AT86RF2XX_AES_BLOCK_SIZE], uint8_t iv[AT86RF2XX_AES_BLOCK_SIZE], const aes_block_t *cipher, uint8_t nblocks)
	Perform AES algorithm and decrypt data blocks in `cipher` to plain data blocks, using CBC mode.

#define	AT86RF2XX_AES_KEY_BITS (128U)
	AES key length in bits.

#define	AT86RF2XX_AES_KEY_LENGTH ((AT86RF2XX_AES_KEY_BITS) / 8)
	AES key length in bytes.

#define	AT86RF2XX_AES_BLOCK_SIZE ((AT86RF2XX_AES_KEY_BITS) / 8)
	AES block size in bytes.

#define	AT86RF2XX_AES_DELAY_US (24)
	Time to complete the AES algorithm in us.

AES rigister addresses
#define	AT86RF2XX_REG__AES_STATUS (0x82)

#define	AT86RF2XX_REG__AES_CTRL (0x83)

#define	AT86RF2XX_REG__AES_KEY_START (0x84)

#define	AT86RF2XX_REG__AES_KEY_END (0x93)

#define	AT86RF2XX_REG__AES_DATA_START (0x84)

#define	AT86RF2XX_REG__AES_DATA_END (0x93)

#define	AT86RF2XX_REG__AES_CTRL_MIRROR (0x94)

Layout of register AES_STATUS
#define	AT86RF2XX_AES_STATUS_MASK__AES_ER (0x80)

#define	AT86RF2XX_AES_STATUS_MASK__AES_DONE (0x01)

#define	AT86RF2XX_AES_STATUS_AES_ER__NO_ERROR (0x00)

#define	AT86RF2XX_AES_STATUS_AES_ER__ERROR (0x80)

#define	AT86RF2XX_AES_STATUS_AES_DONE__NOT_DONE (0x00)

#define	AT86RF2XX_AES_STATUS_AES_DONE__DONE (0x01)

Layout of register AES_CTRL
#define	AT86RF2XX_AES_CTRL_MASK__AES_REQUEST (0x80)

#define	AT86RF2XX_AES_CTRL_MASK__AES_MODE (0x70)

#define	AT86RF2XX_AES_CTRL_MASK__AES_DIR (0x08)

#define	AT86RF2XX_AES_CTRL_AES_REQUEST__IDLE (0x00)

#define	AT86RF2XX_AES_CTRL_AES_REQUEST__START (0x80)

#define	AT86RF2XX_AES_CTRL_AES_MODE__ECB (0x00)

#define	AT86RF2XX_AES_CTRL_AES_MODE__KEY (0x10)

#define	AT86RF2XX_AES_CTRL_AES_MODE__CBC (0x20)

#define	AT86RF2XX_AES_CTRL_AES_DIR__ENC (0x00)

#define	AT86RF2XX_AES_CTRL_AES_DIR__DEC (0x08)

Layout of register AES_CTRL_MIRROR
#define	AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_REQUEST (0x80)

#define	AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_MODE (0x70)

#define	AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_DIR (0x08)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__IDLE (0x00)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__START (0x80)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__ECB (0x00)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__KEY (0x10)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__CBC (0x20)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__ENC (0x00)

#define	AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__DEC (0x08)

Macro Definition Documentation

◆ AT86RF2XX_AES_BLOCK_SIZE

#define AT86RF2XX_AES_BLOCK_SIZE ((AT86RF2XX_AES_KEY_BITS) / 8)

AES block size in bytes.

Definition at line 43 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_DIR__DEC

#define AT86RF2XX_AES_CTRL_AES_DIR__DEC (0x08)

Definition at line 92 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_DIR__ENC

#define AT86RF2XX_AES_CTRL_AES_DIR__ENC (0x00)

Definition at line 91 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_MODE__CBC

#define AT86RF2XX_AES_CTRL_AES_MODE__CBC (0x20)

Definition at line 89 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_MODE__ECB

#define AT86RF2XX_AES_CTRL_AES_MODE__ECB (0x00)

Definition at line 87 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_MODE__KEY

#define AT86RF2XX_AES_CTRL_AES_MODE__KEY (0x10)

Definition at line 88 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_REQUEST__IDLE

#define AT86RF2XX_AES_CTRL_AES_REQUEST__IDLE (0x00)

Definition at line 84 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_AES_REQUEST__START

#define AT86RF2XX_AES_CTRL_AES_REQUEST__START (0x80)

Definition at line 85 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MASK__AES_DIR

#define AT86RF2XX_AES_CTRL_MASK__AES_DIR (0x08)

Definition at line 82 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MASK__AES_MODE

#define AT86RF2XX_AES_CTRL_MASK__AES_MODE (0x70)

Definition at line 81 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MASK__AES_REQUEST

#define AT86RF2XX_AES_CTRL_MASK__AES_REQUEST (0x80)

Definition at line 80 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__DEC

#define AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__DEC (0x08)

Definition at line 111 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__ENC

#define AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__ENC (0x00)

Definition at line 110 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__CBC

#define AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__CBC (0x20)

Definition at line 108 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__ECB

#define AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__ECB (0x00)

Definition at line 106 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__KEY

#define AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__KEY (0x10)

Definition at line 107 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__IDLE

#define AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__IDLE (0x00)

Definition at line 103 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__START

#define AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__START (0x80)

Definition at line 104 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_DIR

#define AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_DIR (0x08)

Definition at line 101 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_MODE

#define AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_MODE (0x70)

Definition at line 100 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_REQUEST

#define AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_REQUEST (0x80)

Definition at line 99 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_DELAY_US

#define AT86RF2XX_AES_DELAY_US (24)

Time to complete the AES algorithm in us.

Definition at line 47 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_KEY_BITS

#define AT86RF2XX_AES_KEY_BITS (128U)

AES key length in bits.

Definition at line 35 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_KEY_LENGTH

#define AT86RF2XX_AES_KEY_LENGTH ((AT86RF2XX_AES_KEY_BITS) / 8)

AES key length in bytes.

Definition at line 39 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_STATUS_AES_DONE__DONE

#define AT86RF2XX_AES_STATUS_AES_DONE__DONE (0x01)

Definition at line 73 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_STATUS_AES_DONE__NOT_DONE

#define AT86RF2XX_AES_STATUS_AES_DONE__NOT_DONE (0x00)

Definition at line 72 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_STATUS_AES_ER__ERROR

#define AT86RF2XX_AES_STATUS_AES_ER__ERROR (0x80)

Definition at line 70 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_STATUS_AES_ER__NO_ERROR

#define AT86RF2XX_AES_STATUS_AES_ER__NO_ERROR (0x00)

Definition at line 69 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_STATUS_MASK__AES_DONE

#define AT86RF2XX_AES_STATUS_MASK__AES_DONE (0x01)

Definition at line 67 of file at86rf2xx_aes.h.

◆ AT86RF2XX_AES_STATUS_MASK__AES_ER

#define AT86RF2XX_AES_STATUS_MASK__AES_ER (0x80)

Definition at line 66 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_CTRL

#define AT86RF2XX_REG__AES_CTRL (0x83)

Definition at line 54 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_CTRL_MIRROR

#define AT86RF2XX_REG__AES_CTRL_MIRROR (0x94)

Definition at line 59 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_DATA_END

#define AT86RF2XX_REG__AES_DATA_END (0x93)

Definition at line 58 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_DATA_START

#define AT86RF2XX_REG__AES_DATA_START (0x84)

Definition at line 57 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_KEY_END

#define AT86RF2XX_REG__AES_KEY_END (0x93)

Definition at line 56 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_KEY_START

#define AT86RF2XX_REG__AES_KEY_START (0x84)

Definition at line 55 of file at86rf2xx_aes.h.

◆ AT86RF2XX_REG__AES_STATUS

#define AT86RF2XX_REG__AES_STATUS (0x82)

Definition at line 53 of file at86rf2xx_aes.h.

Typedef Documentation

◆ aes_block_t

typedef uint8_t aes_block_t[AT86RF2XX_AES_BLOCK_SIZE]

An AES block.

AES works on blocks of 16 bytes

Definition at line 119 of file at86rf2xx_aes.h.

Function Documentation

◆ at86rf2xx_aes_cbc_decrypt()

void at86rf2xx_aes_cbc_decrypt	(	at86rf2xx_t *	dev,
		aes_block_t *	plain,
		uint8_t	key[AT86RF2XX_AES_BLOCK_SIZE],
		uint8_t	iv[AT86RF2XX_AES_BLOCK_SIZE],
		const aes_block_t *	cipher,
		uint8_t	nblocks )

Perform AES algorithm and decrypt data blocks in cipher to plain data blocks, using CBC mode.

Note: The decryption key must have been written before.

Parameters

[in]	dev	Device
[out]	plain	If not NUll, plain data blocks
[out]	key	If not NULL, last round decryption key is stored
[in,out]	iv	in: initial vector, out: last plain block if plain is NULL
[in]	cipher	Cipher data blocks
[in]	nblocks	Number of blocks

◆ at86rf2xx_aes_cbc_encrypt()

void at86rf2xx_aes_cbc_encrypt	(	at86rf2xx_t *	dev,
		aes_block_t *	cipher,
		uint8_t	key[AT86RF2XX_AES_BLOCK_SIZE],
		uint8_t	iv[AT86RF2XX_AES_BLOCK_SIZE],
		const aes_block_t *	plain,
		uint8_t	nblocks )

Perform AES algorithm and encrypt data blocks in plain to cipher data blocks, using CBC mode.

Note: The encryption key must have been written before.

Parameters

[in]	dev	Device
[out]	cipher	If not NULL, cipher blocks
[out]	key	If not NULL, last round encryption key is stored
[in,out]	iv	in: initial vector, out: last cipher block if cipher is NULL
[in]	plain	Plain data blocks
[in]	nblocks	Number of blocks

◆ at86rf2xx_aes_ecb_decrypt()

void at86rf2xx_aes_ecb_decrypt	(	at86rf2xx_t *	dev,
		aes_block_t *	plain,
		uint8_t	key[AT86RF2XX_AES_BLOCK_SIZE],
		const aes_block_t *	cipher,
		uint8_t	nblocks )

Perform AES algorithm and decrypt data blocks in cipher to plain data blocks, using ECB mode.

Note: The decryption key must have been written before.

Parameters

[in]	dev	Device
[out]	plain	If not NULL, plain data blocks
[out]	key	If not NULL, last round decryption key is stored
[in]	cipher	Cipher data blocks
[in]	nblocks	Number of blocks

◆ at86rf2xx_aes_ecb_encrypt()

void at86rf2xx_aes_ecb_encrypt	(	at86rf2xx_t *	dev,
		aes_block_t *	cipher,
		uint8_t	key[AT86RF2XX_AES_BLOCK_SIZE],
		const aes_block_t *	plain,
		uint8_t	nblocks )

Perform AES algorithm and encrypt data blocks in plain to cipher data blocks, using ECB mode.

Note: The encryption key must have been written before.

Parameters

[in]	dev	Device
[out]	cipher	If not NULL, cipher data blocks
[out]	key	If not NULL, last round encryption key is stored
[in]	plain	Plain data blocks
[in]	nblocks	Number of blocks

◆ at86rf2xx_aes_key_read_decrypt()

void at86rf2xx_aes_key_read_decrypt	(	at86rf2xx_t *	dev,
		uint8_t	key[AT86RF2XX_AES_KEY_LENGTH] )

Read the AES key used for decryption.

Parameters

[in]	dev	Device
[out]	key	Buffer to store the key

◆ at86rf2xx_aes_key_read_encrypt()

void at86rf2xx_aes_key_read_encrypt	(	at86rf2xx_t *	dev,
		uint8_t	key[AT86RF2XX_AES_KEY_LENGTH] )

Read the AES key used for encryption.

Parameters

[in]	dev	Device
[out]	key	Buffer to store the key

◆ at86rf2xx_aes_key_write_decrypt()

void at86rf2xx_aes_key_write_decrypt	(	at86rf2xx_t *	dev,
		const uint8_t	key[AT86RF2XX_AES_KEY_LENGTH] )

Write the AES key used for decryption.

It is important to write the decryption key, before decryption is done

Parameters

[in]	dev	Device
[in]	key	Buffer which stores the key

◆ at86rf2xx_aes_key_write_encrypt()

void at86rf2xx_aes_key_write_encrypt	(	at86rf2xx_t *	dev,
		const uint8_t	key[AT86RF2XX_AES_KEY_LENGTH] )

Write the AES key used for encryption.

It is important to write the encryption key, before encryption is done

Parameters

[in]	dev	Device
[in]	key	Buffer which stores the key

Detailed Description

Typedefs

Functions

AES rigister addresses

Layout of register AES_STATUS

Layout of register AES_CTRL

Layout of register AES_CTRL_MIRROR

Macro Definition Documentation

◆ AT86RF2XX_AES_BLOCK_SIZE

◆ AT86RF2XX_AES_CTRL_AES_DIR__DEC

◆ AT86RF2XX_AES_CTRL_AES_DIR__ENC

◆ AT86RF2XX_AES_CTRL_AES_MODE__CBC

◆ AT86RF2XX_AES_CTRL_AES_MODE__ECB

◆ AT86RF2XX_AES_CTRL_AES_MODE__KEY

◆ AT86RF2XX_AES_CTRL_AES_REQUEST__IDLE

◆ AT86RF2XX_AES_CTRL_AES_REQUEST__START

◆ AT86RF2XX_AES_CTRL_MASK__AES_DIR

◆ AT86RF2XX_AES_CTRL_MASK__AES_MODE

◆ AT86RF2XX_AES_CTRL_MASK__AES_REQUEST

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__DEC

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_DIR__ENC

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__CBC

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__ECB

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_MODE__KEY

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__IDLE

◆ AT86RF2XX_AES_CTRL_MIRROR_AES_REQUEST__START

◆ AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_DIR

◆ AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_MODE

◆ AT86RF2XX_AES_CTRL_MIRROR_MASK__AES_REQUEST

◆ AT86RF2XX_AES_DELAY_US

◆ AT86RF2XX_AES_KEY_BITS

◆ AT86RF2XX_AES_KEY_LENGTH

◆ AT86RF2XX_AES_STATUS_AES_DONE__DONE

◆ AT86RF2XX_AES_STATUS_AES_DONE__NOT_DONE

◆ AT86RF2XX_AES_STATUS_AES_ER__ERROR

◆ AT86RF2XX_AES_STATUS_AES_ER__NO_ERROR

◆ AT86RF2XX_AES_STATUS_MASK__AES_DONE

◆ AT86RF2XX_AES_STATUS_MASK__AES_ER

◆ AT86RF2XX_REG__AES_CTRL

◆ AT86RF2XX_REG__AES_CTRL_MIRROR

◆ AT86RF2XX_REG__AES_DATA_END

◆ AT86RF2XX_REG__AES_DATA_START

◆ AT86RF2XX_REG__AES_KEY_END

◆ AT86RF2XX_REG__AES_KEY_START

◆ AT86RF2XX_REG__AES_STATUS

Typedef Documentation

◆ aes_block_t

Function Documentation

◆ at86rf2xx_aes_cbc_decrypt()

◆ at86rf2xx_aes_cbc_encrypt()

◆ at86rf2xx_aes_ecb_decrypt()

◆ at86rf2xx_aes_ecb_encrypt()

◆ at86rf2xx_aes_key_read_decrypt()

◆ at86rf2xx_aes_key_read_encrypt()

◆ at86rf2xx_aes_key_write_decrypt()

◆ at86rf2xx_aes_key_write_encrypt()