stm32f7xx_hal_cryp_ex.c

/**
  ******************************************************************************
  * @file    stm32f7xx_hal_cryp_ex.c
  * @author  MCD Application Team
  * @brief   Extended CRYP HAL module driver
  *          This file provides firmware functions to manage the following 
  *          functionalities of CRYP extension peripheral:
  *           + Extended AES processing functions     
  *  
  @verbatim
  ==============================================================================
                     ##### How to use this driver #####
  ==============================================================================
    [..]
    The CRYP extension HAL driver can be used as follows:
    (#)After AES-GCM or AES-CCM  Encryption/Decryption user can start following API 
       to get the  authentication messages :
      (##) HAL_CRYPEx_AESGCM_GenerateAuthTAG
      (##) HAL_CRYPEx_AESCCM_GenerateAuthTAG

  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics. 
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the 
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f7xx_hal.h"

/** @addtogroup STM32F7xx_HAL_Driver
  * @{
  */
#if defined (AES)  || defined (CRYP)

/** @defgroup CRYPEx CRYPEx
  * @brief CRYP Extension HAL module driver.
  * @{
  */


#ifdef HAL_CRYP_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup CRYPEx_Private_Defines
  * @{
  */
#if defined(AES)
#define CRYP_PHASE_INIT                              0x00000000U             /*!< GCM/GMAC (or CCM) init phase */ 
#define CRYP_PHASE_HEADER                            AES_CR_GCMPH_0          /*!< GCM/GMAC or CCM header phase */ 
#define CRYP_PHASE_PAYLOAD                           AES_CR_GCMPH_1          /*!< GCM(/CCM) payload phase   */ 
#define CRYP_PHASE_FINAL                             AES_CR_GCMPH            /*!< GCM/GMAC or CCM  final phase  */ 

#define CRYP_OPERATINGMODE_ENCRYPT                   0x00000000U             /*!< Encryption mode   */
#define CRYP_OPERATINGMODE_KEYDERIVATION             AES_CR_MODE_0           /*!< Key derivation mode  only used when performing ECB and CBC decryptions  */
#define CRYP_OPERATINGMODE_DECRYPT                   AES_CR_MODE_1           /*!< Decryption       */
#define CRYP_OPERATINGMODE_KEYDERIVATION_DECRYPT     AES_CR_MODE             /*!< Key derivation and decryption only used when performing ECB and CBC decryptions  */

#else /* CRYP */

#define CRYP_PHASE_INIT                 0x00000000U
#define CRYP_PHASE_HEADER               CRYP_CR_GCM_CCMPH_0
#define CRYP_PHASE_PAYLOAD              CRYP_CR_GCM_CCMPH_1
#define CRYP_PHASE_FINAL                CRYP_CR_GCM_CCMPH

#define CRYP_OPERATINGMODE_ENCRYPT      0x00000000U
#define CRYP_OPERATINGMODE_DECRYPT      CRYP_CR_ALGODIR
#endif /* End AES or CRYP */

#define  CRYPEx_PHASE_PROCESS       0x02U     /*!< CRYP peripheral is in processing phase */
#define  CRYPEx_PHASE_FINAL         0x03U     /*!< CRYP peripheral is in final phase this is relevant only with CCM and GCM modes */   

 /*  CTR0 information to use in CCM algorithm */
#define CRYP_CCM_CTR0_0            0x07FFFFFFU         
#define CRYP_CCM_CTR0_3            0xFFFFFF00U         


/**
  * @}
  */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/



/* Exported functions---------------------------------------------------------*/
/** @addtogroup CRYPEx_Exported_Functions
  * @{
  */

/** @defgroup CRYPEx_Exported_Functions_Group1 Extended AES processing functions 
 *  @brief   Extended processing functions. 
 *
@verbatim   
  ==============================================================================
              ##### Extended AES processing functions #####
  ==============================================================================  
    [..]  This section provides functions allowing to generate the authentication 
          TAG in Polling mode 
      (#)HAL_CRYPEx_AESGCM_GenerateAuthTAG
      (#)HAL_CRYPEx_AESCCM_GenerateAuthTAG
         they should be used after Encrypt/Decrypt operation.

@endverbatim
  * @{
  */


/**
  * @brief  generate the GCM authentication TAG.
  * @param  hcryp: pointer to a CRYP_HandleTypeDef structure that contains
  *         the configuration information for CRYP module
  * @param  AuthTag: Pointer to the authentication buffer
  * @param  Timeout: Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_CRYPEx_AESGCM_GenerateAuthTAG(CRYP_HandleTypeDef *hcryp, uint32_t *AuthTag, uint32_t Timeout)
{
  uint32_t tickstart;    
  uint64_t headerlength = (uint64_t)(hcryp->Init.HeaderSize) * 32U; /* Header length in bits */
  uint64_t inputlength = (uint64_t)(hcryp->Size) * 8U; /* input length in bits */
  uint32_t tagaddr = (uint32_t)AuthTag;  
  
  if(hcryp->State == HAL_CRYP_STATE_READY)
  {  
    /* Process locked */
    __HAL_LOCK(hcryp);
    
    /* Change the CRYP peripheral state */
    hcryp->State = HAL_CRYP_STATE_BUSY;
    
    /* Check if initialization phase has already been performed */
    if(hcryp->Phase == CRYPEx_PHASE_PROCESS)
    {
      /* Change the CRYP phase */
      hcryp->Phase = CRYPEx_PHASE_FINAL;
    }
    else /* Initialization phase has not been performed*/
    { 
      /* Disable the Peripheral */
      __HAL_CRYP_DISABLE(hcryp);
      
      /* Sequence error code field */ 
      hcryp->ErrorCode |= HAL_CRYP_ERROR_AUTH_TAG_SEQUENCE; 
      
      /* Change the CRYP peripheral state */
      hcryp->State = HAL_CRYP_STATE_READY;    
      
      /* Process unlocked */
      __HAL_UNLOCK(hcryp);
      return HAL_ERROR;
    }
    
#if defined(CRYP)
    
    /* Disable CRYP to start the final phase */
    __HAL_CRYP_DISABLE(hcryp);
    
    /* Select final phase */  
    MODIFY_REG(hcryp->Instance->CR, CRYP_CR_GCM_CCMPH, CRYP_PHASE_FINAL);  
    
    /*ALGODIR bit must be set to 0.*/ 
    hcryp->Instance->CR &=  ~CRYP_CR_ALGODIR;
    
    /* Enable the CRYP peripheral */
    __HAL_CRYP_ENABLE(hcryp);
    
    /* Write the number of bits in header (64 bits) followed by the number of bits
    in the payload */
    if(hcryp->Init.DataType == CRYP_DATATYPE_1B)
    {
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = __RBIT((uint32_t)(headerlength));
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = __RBIT((uint32_t)(inputlength));
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_8B)
    {
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = __REV((uint32_t)(headerlength));
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = __REV((uint32_t)(inputlength));    
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_16B)
    {
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = __ROR((uint32_t)headerlength, 16U);
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = __ROR((uint32_t)inputlength, 16U);
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_32B)
    {
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = (uint32_t)(headerlength);
      hcryp->Instance->DIN = 0U;
      hcryp->Instance->DIN = (uint32_t)(inputlength);
    }
    else
    {
      /* Nothing to do */
    }
    
    /* Wait for OFNE flag to be raised */
    tickstart = HAL_GetTick();
    while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_OFNE))
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if(((HAL_GetTick() - tickstart ) > Timeout)||(Timeout == 0U))
        {       
          /* Disable the CRYP Peripheral Clock */
          __HAL_CRYP_DISABLE(hcryp);
          
          /* Change state */
          hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
          hcryp->State = HAL_CRYP_STATE_READY;  
          
          /* Process unlocked */          
          __HAL_UNLOCK(hcryp); 
          return HAL_ERROR;
        }
      }
    }          
    
    /* Read the authentication TAG in the output FIFO */
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;      
    
#else /* AES*/
    
    /* Select final phase */
    MODIFY_REG(hcryp->Instance->CR, AES_CR_GCMPH, CRYP_PHASE_FINAL);    
    
    /* Write the number of bits in header (64 bits) followed by the number of bits
    in the payload */ 
    if(hcryp->Init.DataType == CRYP_DATATYPE_1B)
    {
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = __RBIT((uint32_t)(headerlength));
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = __RBIT((uint32_t)(inputlength));
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_8B)
    {
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = __REV((uint32_t)(headerlength));
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = __REV((uint32_t)(inputlength));    
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_16B)
    {
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = __ROR((uint32_t)headerlength, 16U);
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = __ROR((uint32_t)inputlength, 16U);
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_32B)
    {
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = (uint32_t)(headerlength);
      hcryp->Instance->DINR = 0U;
      hcryp->Instance->DINR = (uint32_t)(inputlength);
    }
    else
    {
      /* Nothing to do */
    }
    /* Wait for CCF flag to be raised */
    tickstart = HAL_GetTick();
    while(HAL_IS_BIT_CLR(hcryp->Instance->SR, AES_SR_CCF))
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if(((HAL_GetTick() - tickstart ) > Timeout)||(Timeout == 0U))
        {       
          /* Disable the CRYP peripheral clock */
          __HAL_CRYP_DISABLE(hcryp);
          
          /* Change state */
          hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
          hcryp->State = HAL_CRYP_STATE_READY;  
          
          /* Process unlocked */          
          __HAL_UNLOCK(hcryp); 
          return HAL_ERROR;
        }
      }
    }         
    
    /* Read the authentication TAG in the output FIFO */
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR; 
    
    /* Clear CCF flag */
    __HAL_CRYP_CLEAR_FLAG(hcryp, CRYP_CCF_CLEAR);       
    
#endif /* End AES or CRYP */ 
    
    /* Disable the peripheral */
    __HAL_CRYP_DISABLE(hcryp);
    
    /* Change the CRYP peripheral state */
    hcryp->State = HAL_CRYP_STATE_READY;    
    
    /* Process unlocked */
    __HAL_UNLOCK(hcryp);
  }
  else
  {
    /* Busy error code field */
    hcryp->ErrorCode |= HAL_CRYP_ERROR_BUSY; 
    return HAL_ERROR;
  }   
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  AES CCM Authentication TAG generation.
  * @param  hcryp: pointer to a CRYP_HandleTypeDef structure that contains
  *         the configuration information for CRYP module
  * @param  AuthTag: Pointer to the authentication buffer
  * @param  Timeout: Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_CRYPEx_AESCCM_GenerateAuthTAG(CRYP_HandleTypeDef *hcryp, uint32_t *AuthTag, uint32_t Timeout)
{
  uint32_t tagaddr = (uint32_t)AuthTag;
  uint32_t ctr0 [4]={0};
  uint32_t ctr0addr = (uint32_t)ctr0;
  uint32_t tickstart;

  if(hcryp->State == HAL_CRYP_STATE_READY)
  {
    /* Process locked */
    __HAL_LOCK(hcryp);

    /* Change the CRYP peripheral state */
    hcryp->State = HAL_CRYP_STATE_BUSY;

    /* Check if initialization phase has already been performed */
    if(hcryp->Phase == CRYPEx_PHASE_PROCESS)
    {
      /* Change the CRYP phase */
      hcryp->Phase = CRYPEx_PHASE_FINAL;
    }
    else /* Initialization phase has not been performed*/
    {
      /* Disable the peripheral */
      __HAL_CRYP_DISABLE(hcryp);

      /* Sequence error code field */
      hcryp->ErrorCode |= HAL_CRYP_ERROR_AUTH_TAG_SEQUENCE;

      /* Change the CRYP peripheral state */
      hcryp->State = HAL_CRYP_STATE_READY;

      /* Process unlocked */
      __HAL_UNLOCK(hcryp);
      return HAL_ERROR;
    }

#if defined(CRYP) 

    /* Disable CRYP to start the final phase */
    __HAL_CRYP_DISABLE(hcryp);

    /* Select final phase & ALGODIR bit must be set to 0. */
    MODIFY_REG(hcryp->Instance->CR, CRYP_CR_GCM_CCMPH|CRYP_CR_ALGODIR, CRYP_PHASE_FINAL|CRYP_OPERATINGMODE_ENCRYPT);

    /* Enable the CRYP peripheral */
    __HAL_CRYP_ENABLE(hcryp);

    /* Write the counter block in the IN FIFO, CTR0 information from B0
    data has to be swapped according to the DATATYPE*/
    ctr0[0]=(hcryp->Init.B0[0]) & CRYP_CCM_CTR0_0;
    ctr0[1]=hcryp->Init.B0[1];
    ctr0[2]=hcryp->Init.B0[2];
    ctr0[3]=hcryp->Init.B0[3] &  CRYP_CCM_CTR0_3;

    if(hcryp->Init.DataType == CRYP_DATATYPE_8B)
    {
      hcryp->Instance->DIN = __REV(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DIN = __REV(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DIN = __REV(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DIN = __REV(*(uint32_t*)(ctr0addr));
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_16B)
    {
      hcryp->Instance->DIN = __ROR(*(uint32_t*)(ctr0addr), 16U);
      ctr0addr+=4U;
      hcryp->Instance->DIN = __ROR(*(uint32_t*)(ctr0addr), 16U);
      ctr0addr+=4U;
      hcryp->Instance->DIN = __ROR(*(uint32_t*)(ctr0addr), 16U);
      ctr0addr+=4U;
      hcryp->Instance->DIN = __ROR(*(uint32_t*)(ctr0addr), 16U);
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_1B)
    {
      hcryp->Instance->DIN = __RBIT(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DIN = __RBIT(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DIN = __RBIT(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DIN = __RBIT(*(uint32_t*)(ctr0addr));
    }
    else
    {
      hcryp->Instance->DIN = *(uint32_t*)(ctr0addr);
      ctr0addr+=4U;
      hcryp->Instance->DIN = *(uint32_t*)(ctr0addr);
      ctr0addr+=4U;
      hcryp->Instance->DIN = *(uint32_t*)(ctr0addr);
      ctr0addr+=4U;
      hcryp->Instance->DIN = *(uint32_t*)(ctr0addr);
    }
    /* Wait for OFNE flag to be raised */
    tickstart = HAL_GetTick();
    while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_OFNE))
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if(((HAL_GetTick() - tickstart ) > Timeout)||(Timeout == 0U))
        {
          /* Disable the CRYP peripheral Clock */
          __HAL_CRYP_DISABLE(hcryp);

          /* Change state */
          hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
          hcryp->State = HAL_CRYP_STATE_READY;

          /* Process unlocked */
          __HAL_UNLOCK(hcryp);
          return HAL_ERROR;
        }
      }
    }

    /* Read the Auth TAG in the IN FIFO */
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;

#else /* AES */

    /* Select final phase */
    MODIFY_REG(hcryp->Instance->CR, AES_CR_GCMPH, CRYP_PHASE_FINAL);

    /* Write the counter block in the IN FIFO, CTR0 information from B0
    data has to be swapped according to the DATATYPE*/
    if(hcryp->Init.DataType == CRYP_DATATYPE_8B)
    {
      ctr0[0]=(__REV(hcryp->Init.B0[0]) & CRYP_CCM_CTR0_0);
      ctr0[1]=__REV(hcryp->Init.B0[1]);
      ctr0[2]=__REV(hcryp->Init.B0[2]);
      ctr0[3]=(__REV(hcryp->Init.B0[3])& CRYP_CCM_CTR0_3);

      hcryp->Instance->DINR = __REV(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DINR = __REV(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DINR = __REV(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DINR = __REV(*(uint32_t*)(ctr0addr));
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_16B)
    {
      ctr0[0]= ( __ROR((hcryp->Init.B0[0]), 16U)& CRYP_CCM_CTR0_0);
      ctr0[1]=   __ROR((hcryp->Init.B0[1]), 16U);
      ctr0[2]=   __ROR((hcryp->Init.B0[2]), 16U);
      ctr0[3]= ( __ROR((hcryp->Init.B0[3]), 16U)& CRYP_CCM_CTR0_3);

      hcryp->Instance->DINR = __ROR(*(uint32_t*)(ctr0addr), 16U);
      ctr0addr+=4U;
      hcryp->Instance->DINR = __ROR(*(uint32_t*)(ctr0addr), 16U);
      ctr0addr+=4U;
      hcryp->Instance->DINR = __ROR(*(uint32_t*)(ctr0addr), 16U);
      ctr0addr+=4U;
      hcryp->Instance->DINR = __ROR(*(uint32_t*)(ctr0addr), 16U);
    }
    else if(hcryp->Init.DataType == CRYP_DATATYPE_1B)
    {
      ctr0[0]=(__RBIT(hcryp->Init.B0[0])& CRYP_CCM_CTR0_0);
      ctr0[1]=__RBIT(hcryp->Init.B0[1]);
      ctr0[2]=__RBIT(hcryp->Init.B0[2]);
      ctr0[3]=(__RBIT(hcryp->Init.B0[3])& CRYP_CCM_CTR0_3);

      hcryp->Instance->DINR = __RBIT(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DINR = __RBIT(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DINR = __RBIT(*(uint32_t*)(ctr0addr));
      ctr0addr+=4U;
      hcryp->Instance->DINR = __RBIT(*(uint32_t*)(ctr0addr));
    }
    else
    {
      ctr0[0]=(hcryp->Init.B0[0]) & CRYP_CCM_CTR0_0;
      ctr0[1]=hcryp->Init.B0[1];
      ctr0[2]=hcryp->Init.B0[2];
      ctr0[3]=hcryp->Init.B0[3] &  CRYP_CCM_CTR0_3;

      hcryp->Instance->DINR = *(uint32_t*)(ctr0addr);
      ctr0addr+=4U;
      hcryp->Instance->DINR = *(uint32_t*)(ctr0addr);
      ctr0addr+=4U;
      hcryp->Instance->DINR = *(uint32_t*)(ctr0addr);
      ctr0addr+=4U;
      hcryp->Instance->DINR = *(uint32_t*)(ctr0addr);
    }

    /* Wait for CCF flag to be raised */
    tickstart = HAL_GetTick();
    while(HAL_IS_BIT_CLR(hcryp->Instance->SR, AES_SR_CCF))
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if(((HAL_GetTick() - tickstart ) > Timeout)||(Timeout == 0U))
        {
          /* Disable the CRYP peripheral Clock */
          __HAL_CRYP_DISABLE(hcryp);

          /* Change state */
          hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
          hcryp->State = HAL_CRYP_STATE_READY;

          /* Process unlocked */
          __HAL_UNLOCK(hcryp);
          return HAL_ERROR;
        }
      }
    }

    /* Read the authentication TAG in the output FIFO */
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;
    tagaddr+=4U;
    *(uint32_t*)(tagaddr) = hcryp->Instance->DOUTR;

    /* Clear CCF Flag */
    __HAL_CRYP_CLEAR_FLAG(hcryp, CRYP_CCF_CLEAR);

#endif /* End of AES || CRYP */

    /* Change the CRYP peripheral state */
    hcryp->State = HAL_CRYP_STATE_READY;

    /* Process unlocked */
    __HAL_UNLOCK(hcryp);

    /* Disable CRYP  */
    __HAL_CRYP_DISABLE(hcryp);
  }
  else
  {
    /* Busy error code field */
    hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
    return HAL_ERROR;
  }
  /* Return function status */
  return HAL_OK;   
}

/**
  * @}
  */

#if defined (AES)
/** @defgroup CRYPEx_Exported_Functions_Group2 Key Derivation functions
 *  @brief   AutoKeyDerivation functions 
 *
@verbatim
  ==============================================================================
              ##### Key Derivation functions #####
  ==============================================================================  
    [..]  This section provides functions allowing to Enable or Disable the
          the AutoKeyDerivation parameter in CRYP_HandleTypeDef structure
          These function are allowed only in TinyAES IP.

@endverbatim
  * @{
  */

/**
  * @brief  AES enable key derivation functions
  * @param  hcryp: pointer to a CRYP_HandleTypeDef structure.
  * @retval None
  */
void  HAL_CRYPEx_EnableAutoKeyDerivation(CRYP_HandleTypeDef *hcryp)
{
  if(hcryp->State == HAL_CRYP_STATE_READY)
  {  
    hcryp->AutoKeyDerivation = ENABLE;
  }
  else
  {
    /* Busy error code field */
    hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY; 
  } 
}
/**
  * @brief  AES disable key derivation functions
  * @param  hcryp: pointer to a CRYP_HandleTypeDef structure.
  * @retval None
  */
void  HAL_CRYPEx_DisableAutoKeyDerivation(CRYP_HandleTypeDef *hcryp)
{
  if(hcryp->State == HAL_CRYP_STATE_READY)
  {
    hcryp->AutoKeyDerivation = DISABLE;
  }
  else
  {
    /* Busy error code field */
    hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY; 
  }  
}

/**
  * @}
  */

#endif /* AES */ 
#endif /* HAL_CRYP_MODULE_ENABLED */

/**
  * @}
  */
#endif /* TinyAES or CRYP*/
/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/