at86rf2xx_aes.h

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/*
 * Copyright (C) 2020 Otto-von-Guericke-Universität Magdeburg
 *
 * This file is subject to the terms and conditions of the GNU Lesser General
 * Public License v2.1. See the file LICENSE in the top level directory for more
 * details.
 */
 
#pragma once

 
#include "at86rf2xx.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define AT86RF2XX_AES_KEY_BITS                          (128U)
#define AT86RF2XX_AES_KEY_LENGTH                        ((AT86RF2XX_AES_KEY_BITS) / 8)
#define AT86RF2XX_AES_BLOCK_SIZE                        ((AT86RF2XX_AES_KEY_BITS) / 8)
#define AT86RF2XX_AES_DELAY_US                          (24)

#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)

#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)

#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)

#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)

typedef uint8_t aes_block_t[AT86RF2XX_AES_BLOCK_SIZE];

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

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

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

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

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);

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);

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);

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);
 
#ifdef __cplusplus
}
#endif