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/**
******************************************************************************
* @file drbg.h
* @author MCD Application Team
* @brief Implements a pseudo random engine based on AES128-DRBG.
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2015 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Image license SLA0044,
* 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/SLA0044
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __CRL_DRGB_H__
#define __CRL_DRGB_H__
#ifdef __cplusplus
extern "C"
{
#endif
/** @ingroup DRBG-AES128
* @{
*/
/* Exported types ------------------------------------------------------------*/
/**
* @brief Structure to store the state/context of the DRBG_AES128
*/
typedef struct
{
uint32_t v[4]; /*!< V value, a 128 bit value */
uint32_t key[4]; /*!< K value, a 128 bit value */
uint32_t reseed_counter; /*!< Reseed counter 32-bit of data */
}
drbg_aes128_state_stt;
/* Exported constants --------------------------------------------------------*/
#define CRL_DRBG_AES_MAX_BYTES_PER_REQUEST 65536u /*!< Maximum number of bytes (uint8_t) a generate request can output */
#define CRL_DRBG_AES128_ENTROPY_MIN_LEN 16u /*!< Minimum number of bytes for the entropy input */
#define CRL_DRBG_AES_ENTROPY_MAX_LEN 32u /*!< Maximum number of bytes for the entropy input */
#define CRL_DRBG_AES_MAX_PERS_STR_LEN 32u /*!< Maximum number of bytes for the personalization string */
#define CRL_DRBG_AES_MAX_ADD_INPUT_LEN CRL_DRBG_AES_MAX_PERS_STR_LEN /*!< Maximum number of bytes for the additional input */
#define CRL_DRBG_AES_MAX_NONCE_LEN 16u /*!< Maximum number of bytes for the nonce */
#define CRL_DRBG_AES_REQS_BTW_RESEEDS 0xFFFFFFFF /*!< Maximum number of request before a reseed is needed. Not supported. */
#define CRL_DRBG_AES128_STATE_SIZE 36u /*!< Required size in bytes for a DRBG-AES128 state */
/* Exported functions ------------------------------------------------------- */
/* DRBG functions *************************************************************/
/* Instantiate function for DRBG_AES128 ***************************************/
int32_t crl_DRBG_AES128_Instantiate (uint8_t *P_pState, \
const uint8_t *P_pEntropyInput, \
int32_t P_entropySize, \
const uint8_t *P_pNonce, \
int32_t P_nonceSize, \
const uint8_t *P_pPersStr, \
int32_t P_persStrSize);
\
/* Generate function for DRBG_AES128 ******************************************/
int32_t crl_DRBG_AES128_Generate (uint8_t *P_pState, \
uint8_t *P_pOutput, \
const uint8_t *P_pAddInput, \
int32_t P_addInputSize, \
int32_t P_nBytes);
\
/* Reseed *********************************************************************/
int32_t crl_DRBG_AES128_Reseed (uint8_t *P_pState, \
const uint8_t *P_pEntropyInput, \
int32_t P_entropySize, \
const uint8_t *P_pAddInput, \
int32_t P_addInputSize);
\
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /*__DRGB_H__ */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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