# Kinetis Bootloader: aes_security.h Source File

aes_security.h
/*
* Copyright (c) 2014, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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*/
#ifndef _aes_security_h
#define _aes_security_h
#include "bootloader_common.h"
// Definitions
#define AES_128_KEY_SIZE 16 // bytes
#define AES_128_KEY_SIZE_WORDS 4 // 32 bit words
#define AES_BLOCK_SIZE_WORDS 4 // 32 bit words
#define AES_BLOCK_SIZE 16 // bytes
#define AES_128_KEY_SCHEDULE_SIZE_WORDS 44 // 32 bit words
#define AES_SECURITY_SUPPORTED (defined(CAU_BASE) || defined(LTC0_BASE) || FSL_FEATURE_SIM_HAS_MISCCTRL_LTCEN)
typedef struct mmcau_function_info
{
uint32_t tag; // 'kcau' = 0x
uint32_t length; // number of bytes to copy, this number will be copied from the start of aes_init
uint32_t aes_init_start;
uint32_t aes_encrypt_start;
uint32_t aes_decrypt_start;
} mmcau_function_info_t;
enum _mmcau_info_tag
{
kMmcauInfoTag = FOUR_CHAR_CODE('k', 'c', 'a', 'u')
};
// API
#if defined(__cplusplus)
extern "C" {
#endif
void aes_init(uint32_t *key);
void aes_encrypt(uint32_t *in, uint32_t *key, uint32_t *out);
void aes_decrypt(uint32_t *in, uint32_t *key, uint32_t *out);
#if defined(__cplusplus)
}
#endif
#endif // _aes_security_h
// EOF
kMmcauInfoTag
Tag value used to validate the bootloader configuration data.
Definition: aes_security.h:63
mmcau_function_info_t
Definition: aes_security.h:51
aes_init
void aes_init(uint32_t *key)
An initialization function for the decryption peripheral Warning: The key must be word aligned...
Definition: aes_security.c:79
_mmcau_info_tag
_mmcau_info_tag
Definition: aes_security.h:60
aes_decrypt
void aes_decrypt(uint32_t *in, uint32_t *key, uint32_t *out)
Decrypts a 16 byte block of data in and out may use the same address so decrypting in place is suppor...
Definition: aes_security.c:138
aes_encrypt
void aes_encrypt(uint32_t *in, uint32_t *key, uint32_t *out)
Encrypts a 16 byte block of data in and out may use the same address so encrypting in place is suppor...
Definition: aes_security.c:113