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/************************************************************************************
* arch/arm/src/lpc43xx/chip/lpc43_aes.h
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 OWNER 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; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_LPC43XX_CHIP_LPC43_AES_H
#define __ARCH_ARM_SRC_LPC43XX_CHIP_LPC43_AES_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* The AES is controlled through a set of simple API calls located in the LPC43xx
* ROM. This value holds the pointer to the AES driver table.
*/
#define LPC43_ROM_AES_DRIVER_TABLE LPC43_ROM_DRIVER_TABLE2
/************************************************************************************
* Public Types
************************************************************************************/
enum lpc43_aescmd_e
{
AES_API_CMD_ENCODE_ECB = 0,
AES_API_CMD_DECODE_ECB = 1,
AES_API_CMD_ENCODE_CBC = 2,
AES_API_CMD_DECODE_CBC = 3
};
struct lpc43_aes_s
{
/* Initialize the AES engine */
void (*aes_Init)(void);
/* Offset 0x04 -- Defines AES engine operation mode. See enum lpc43_aescmd_e */
unsigned int (*aes_SetMode)(unsigned int cmd);
/* Load 128-bit AES user keys */
void (*aes_LoadKey1)(void);
void (*aes_LoadKey2)(void);
/* Loads randomly generated key in AES engine. To update the RNG and load a new
* random number, use the API call otp_GenRand before aes_LoadKeyRNG.
*/
void (*aes_LoadKeyRNG)(void);
/* Loads 128-bit AES software defined user key (16 bytes) */
void (*aes_LoadKeySW)(unsigned char *key);
/* Loads 128-bit AES initialization vector (16 bytes) */
void (*aes_LoadIV_SW)(unsigned char *iv);
/* Loads 128-bit AES IC specific initialization vector, which is used to decrypt
* a boot image.
*/
void (*aes_LoadIV_IC)(void);
};
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
#endif /* __ARCH_ARM_SRC_LPC43XX_CHIP_LPC43_AES_H */
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