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/**
******************************************************************************
* @file aes_common.h
* @author MCD Application Team
* @version V3.0.0
* @date 05-June-2015
* @brief AES common functions and definitions
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2015 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Image SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __AES_COMMON_H__
#define __AES_COMMON_H__
#ifdef __cplusplus
extern "C"
{
#endif
/** @addtogroup AES
* @{
*/
/* Exported constants --------------------------------------------------------*/
#define CRL_AES128_KEY 16 /*!< Number of bytes (uint8_t) necessary to store an AES key of 128 bits. */
#define CRL_AES128_EXPANDED_KEY 44 /*!< Number of ints (uint32_t) necessary to store an expanded AES key of 128 bits. */
#define CRL_AES192_KEY 24 /*!< Number of bytes (uint8_t) necessary to store an AES key of 192 bits. */
#define CRL_AES192_EXPANDED_KEY 52 /*!< Number of ints (uint32_t) necessary to store an expanded AES key of 192 bits. */
#define CRL_AES256_KEY 32 /*!< Number of bytes (uint8_t) necessary to store an AES key of 256 bits. */
#define CRL_AES256_EXPANDED_KEY 60 /*!< Number of ints (uint32_t) necessary to store an expanded AES key of 256 bits. */
#define CRL_AES_BLOCK 16 /*!< Number of bytes (uint8_t) necessary to store an AES block. */
#ifdef INCLUDE_AES256
# define CRL_AES_MAX_EXPKEY_SIZE 60 /*!< The max size of the AES expanded key (in uint32_t) according to the INCLUDE OPTIONS */
# else
# ifdef INCLUDE_AES192
# define CRL_AES_MAX_EXPKEY_SIZE 52 /*!< The max size of the AES expanded key (in uint32_t) according to the INCLUDE OPTIONS */
# else
# define CRL_AES_MAX_EXPKEY_SIZE 44 /*!< The max size of the AES expanded key (in uint32_t) according to the INCLUDE OPTIONS */
# endif
#endif /*include aes 256 */
/**
* @}
*/
/* Exported types ------------------------------------------------------------*/
/** @addtogroup AESCBC
* @{
*/
typedef struct
{
uint32_t mContextId; /*!< Unique ID of this context. \b Not \b used in current implementation. */
SKflags_et mFlags; /*!< 32 bit mFlags, used to perform keyschedule */
const uint8_t *pmKey; /*!< Pointer to original Key buffer */
const uint8_t *pmIv; /*!< Pointer to original Initialization Vector buffer */
int32_t mIvSize; /*!< Size of the Initialization Vector in bytes */
uint32_t amIv[4]; /*!< Temporary result/IV */
int32_t mKeySize; /*!< Key length in bytes */
uint32_t amExpKey[CRL_AES_MAX_EXPKEY_SIZE]; /*!< Expanded AES key */
}
AESCBCctx_stt; /*!< AES context structure for CBC mode */
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
#ifdef INCLUDE_ENCRYPTION
void AES_keyschedule_enc (const uint8_t *P_pKey, \
uint32_t *P_pExpKey, \
int32_t P_keySize);
void AES_general_SW_enc (const uint32_t* P_pInputBuffer,\
uint32_t* P_pOutputBuffer, \
const uint32_t* P_pExpKey, \
int32_t P_keySize);
#endif
#ifdef INCLUDE_DECRYPTION
void AES_keyschedule_dec (const uint8_t *P_pKey, \
uint32_t *P_pExpKey, \
int32_t P_keySize);
void AES_general_SW_dec (const uint32_t* P_pInputBuffer,\
uint32_t* P_pOutputBuffer, \
const uint32_t* P_pExpKey, \
int32_t P_keySize);
#endif
/** @addtogroup AESlowlevel AES
* @{
*/
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /*__AES_COMMON_H__*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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