text: /**
    ******************************************************************************
    * @file    HASH/HASH_SHA1_MD5/Src/main.c
    * @author  MCD Application Team
    * @brief   This example provides a short description of HASH digest calculation
    *          using SHA1 and MD5 example.
    ******************************************************************************
    * @attention
    *
    * Copyright (c) 2016 STMicroelectronics.
    * All rights reserved.
    *
    * This software is licensed under terms that can be found in the LICENSE file
    * in the root directory of this software component.
    * If no LICENSE file comes with this software, it is provided AS-IS.
    *
    ******************************************************************************
    */
  
  /* Includes ------------------------------------------------------------------*/
  #include "main.h"
  
  /** @addtogroup STM32F7xx_HAL_Examples
    * @{
    */
  
  /** @addtogroup HASH_SHA1_MD5
    * @{
    */
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  #define INPUT_TAB_SIZE    ((uint32_t) 261)/* The size of the input data "aInput" */
  
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* HASH handler declaration */
  HASH_HandleTypeDef     HashHandle;
  /*
    "The hash processor is a fully compliant implementation of the secure
     hash algorithm (SHA-1), the MD5 (message-digest algorithm 5) hash
     algorithm and the HMAC (keyed-hash message authentication code)
     algorithm suitable for a variety of applications.*** STM32 ***"
  */
  __ALIGN_BEGIN const uint8_t aInput[INPUT_TAB_SIZE] __ALIGN_END = 
                          {0x54,0x68,0x65,0x20,0x68,0x61,0x73,0x68,
                           0x20,0x70,0x72,0x6f,0x63,0x65,0x73,0x73,
                           0x6f,0x72,0x20,0x69,0x73,0x20,0x61,0x20,
                           0x66,0x75,0x6c,0x6c,0x79,0x20,0x63,0x6f,
                           0x6d,0x70,0x6c,0x69,0x61,0x6e,0x74,0x20,
                           0x69,0x6d,0x70,0x6c,0x65,0x6d,0x65,0x6e,
                           0x74,0x61,0x74,0x69,0x6f,0x6e,0x20,0x6f,
                           0x66,0x20,0x74,0x68,0x65,0x20,0x73,0x65,
                           0x63,0x75,0x72,0x65,0x20,0x68,0x61,0x73,
                           0x68,0x20,0x61,0x6c,0x67,0x6f,0x72,0x69,
                           0x74,0x68,0x6d,0x20,0x28,0x53,0x48,0x41,
                           0x2d,0x31,0x29,0x2c,0x20,0x74,0x68,0x65,
                           0x20,0x4d,0x44,0x35,0x20,0x28,0x6d,0x65,
                           0x73,0x73,0x61,0x67,0x65,0x2d,0x64,0x69,
                           0x67,0x65,0x73,0x74,0x20,0x61,0x6c,0x67,
                           0x6f,0x72,0x69,0x74,0x68,0x6d,0x20,0x35,
                           0x29,0x20,0x68,0x61,0x73,0x68,0x20,0x61,
                           0x6c,0x67,0x6f,0x72,0x69,0x74,0x68,0x6d,
                           0x20,0x61,0x6e,0x64,0x20,0x74,0x68,0x65,
                           0x20,0x48,0x4d,0x41,0x43,0x20,0x28,0x6b,
                           0x65,0x79,0x65,0x64,0x2d,0x68,0x61,0x73,
                           0x68,0x20,0x6d,0x65,0x73,0x73,0x61,0x67,
                           0x65,0x20,0x61,0x75,0x74,0x68,0x65,0x6e,
                           0x74,0x69,0x63,0x61,0x74,0x69,0x6f,0x6e,
                           0x20,0x63,0x6f,0x64,0x65,0x29,0x20,0x61,
                           0x6c,0x67,0x6f,0x72,0x69,0x74,0x68,0x6d,
                           0x20,0x73,0x75,0x69,0x74,0x61,0x62,0x6c,
                           0x65,0x20,0x66,0x6f,0x72,0x20,0x61,0x20,
                           0x76,0x61,0x72,0x69,0x65,0x74,0x79,0x20,
                           0x6f,0x66,0x20,0x61,0x70,0x70,0x6c,0x69,
                           0x63,0x61,0x74,0x69,0x6f,0x6e,0x73,0x2e,
                           0x2a,0x2a,0x2a,0x20,0x53,0x54,0x4d,0x33,
                           0x32,0x20,0x2a,0x2a,0x2a};
   
  __ALIGN_BEGIN static uint8_t aMD5Digest[16] __ALIGN_END;
  __ALIGN_BEGIN static uint8_t aExpectMD5Digest[16] __ALIGN_END = {0x67, 0x07, 0x86, 0x2c, 0x7c, 0xd0, 0xb5, 0x22,
                                                                   0xb2, 0xdd, 0x22, 0xd8, 0x47, 0x7b, 0xe3, 0x18};
  __ALIGN_BEGIN static uint8_t aSHA1Digest[20] __ALIGN_END;
  __ALIGN_BEGIN static uint8_t aExpectSHA1Digest[20] __ALIGN_END = {0xf8, 0x59, 0xc1, 0x8d, 0xec, 0x94, 0x72, 0x42,
                                                                    0x79, 0x24, 0xfb, 0x61, 0xef, 0x7c, 0x6a, 0x6b,
                                                                    0x67, 0x0b, 0xf9, 0xc3};
  
  /* Private function prototypes -----------------------------------------------*/
  static void MPU_Config(void);
  static void SystemClock_Config(void);
  static void CPU_CACHE_Enable(void);
  static void Error_Handler(void);
  
  /* Private functions ---------------------------------------------------------*/
  
  /**
    * @brief  Main program
    * @param  None
    * @retval None
    */
  int main(void)
  {
    /* Configure the MPU attributes */
    MPU_Config();
  
    /* Enable the CPU Cache */
    CPU_CACHE_Enable();
  
    /* STM32F7xx HAL library initialization:
         - Configure the Flash prefetch
         - Systick timer is configured by default as source of time base, but user 
           can eventually implement his proper time base source (a general purpose 
           timer for example or other time source), keeping in mind that Time base 
           duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
           handled in milliseconds basis.
         - Set NVIC Group Priority to 4
         - Low Level Initialization
       */
    HAL_Init();
  
    /* Configure the system clock to 216 MHz */
    SystemClock_Config();
  
    /* Configure LED1, LED3 and LED4 */
    BSP_LED_Init(LED1);
    BSP_LED_Init(LED3);
    BSP_LED_Init(LED4);
  
    /****************************************************************************/
    /******************************** SHA1 **************************************/
    /****************************************************************************/
    HAL_HASH_DeInit(&HashHandle);
    HashHandle.Init.DataType = HASH_DATATYPE_8B;
  
    if (HAL_HASH_Init(&HashHandle) != HAL_OK)
    {
      Error_Handler();
    }
  
    /* Compute SHA1 */
    if (HAL_HASH_SHA1_Start(&HashHandle, (uint8_t *)aInput, INPUT_TAB_SIZE, aSHA1Digest, 0xFF) != HAL_OK)
    {
      Error_Handler();
    }
    /* Compare computed digest with expected one */
    if (memcmp(aSHA1Digest, aExpectSHA1Digest, sizeof(aExpectSHA1Digest) / sizeof(aExpectSHA1Digest[0])) != 0)
    {
      Error_Handler();
    }
    else
    {
      BSP_LED_On(LED1);
    }
  
    /****************************************************************************/
    /******************************** MD5 ***************************************/
    /****************************************************************************/
    HAL_HASH_DeInit(&HashHandle);
    HashHandle.Init.DataType = HASH_DATATYPE_8B;
    HAL_HASH_Init(&HashHandle);
  
    /* Compute SHA1 */
    if (HAL_HASH_MD5_Start(&HashHandle, (uint8_t *)aInput, INPUT_TAB_SIZE, aMD5Digest, 0xFF) != HAL_OK)
    {
      Error_Handler();
    }
    /* Compare computed digest with expected one */
    if (memcmp(aMD5Digest, aExpectMD5Digest, sizeof(aExpectMD5Digest) / sizeof(aExpectMD5Digest[0])) != 0)
    {
      Error_Handler();
    }
    else
    {
      BSP_LED_On(LED4);
    }
    while (1)
    {
    }
  }
  
  /**
    * @brief  System Clock Configuration
    *         The system Clock is configured as follow : 
    *            System Clock source            = PLL (HSE)
    *            SYSCLK(Hz)                     = 216000000
    *            HCLK(Hz)                       = 216000000
    *            AHB Prescaler                  = 1
    *            APB1 Prescaler                 = 4
    *            APB2 Prescaler                 = 2
    *            HSE Frequency(Hz)              = 25000000
    *            PLL_M                          = 25
    *            PLL_N                          = 432
    *            PLL_P                          = 2
    *            PLL_Q                          = 9
    *            PLL_R                          = 7
    *            VDD(V)                         = 3.3
    *            Main regulator output voltage  = Scale1 mode
    *            Flash Latency(WS)              = 7
    * @param  None
    * @retval None
    */
  static void SystemClock_Config(void)
  {
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
    RCC_OscInitTypeDef RCC_OscInitStruct;
    HAL_StatusTypeDef  ret = HAL_OK;
    
    /* Enable Power Control clock */
    __HAL_RCC_PWR_CLK_ENABLE();
    
    /* The voltage scaling allows optimizing the power consumption when the device is 
       clocked below the maximum system frequency, to update the voltage scaling value 
       regarding system frequency refer to product datasheet.  */
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  
    /* Enable HSE Oscillator and activate PLL with HSE as source */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLM = 25;
    RCC_OscInitStruct.PLL.PLLN = 432;  
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
    RCC_OscInitStruct.PLL.PLLQ = 9;
    RCC_OscInitStruct.PLL.PLLR = 7;
    
    ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
    if(ret != HAL_OK)
    {
      while(1) { ; }
    }
    
    /* Activate the OverDrive to reach the 216 MHz Frequency */  
    ret = HAL_PWREx_EnableOverDrive();
    if(ret != HAL_OK)
    {
      while(1) { ; }
    }
    
    /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
    RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;  
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; 
    
    ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7);
    if(ret != HAL_OK)
    {
      while(1) { ; }
    }  
  }
  /**
  * @brief  CPU L1-Cache enable.
  * @param  None
  * @retval None
  */
  static void CPU_CACHE_Enable(void)
  {
    /* Enable I-Cache */
    SCB_EnableICache();
  
    /* Enable D-Cache */
    SCB_EnableDCache();
  }
  
  /**
    * @brief  This function is executed in case of error occurrence.
    * @param  None
    * @retval None
    */
  static void Error_Handler(void)
  {
    /* Turn LED3 on */
    BSP_LED_On(LED3);
    while (1)
    {
    }
  }
  
  
  /**
    * @brief  Configure the MPU attributes
    * @param  None
    * @retval None
    */
  static void MPU_Config(void)
  {
    MPU_Region_InitTypeDef MPU_InitStruct;
  
    /* Disable the MPU */
    HAL_MPU_Disable();
  
    /* Configure the MPU as Strongly ordered for not defined regions */
    MPU_InitStruct.Enable = MPU_REGION_ENABLE;
    MPU_InitStruct.BaseAddress = 0x00;
    MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
    MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
    MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
    MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
    MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
    MPU_InitStruct.Number = MPU_REGION_NUMBER0;
    MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
    MPU_InitStruct.SubRegionDisable = 0x87;
    MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
  
    HAL_MPU_ConfigRegion(&MPU_InitStruct);
  
    /* Enable the MPU */
    HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
  }
  
  #ifdef  USE_FULL_ASSERT
  
  /**
    * @brief  Reports the name of the source file and the source line number
    *         where the assert_param error has occurred.
    * @param  file: pointer to the source file name
    * @param  line: assert_param error line source number
    * @retval None
    */
  void assert_failed(uint8_t *file, uint32_t line)
  {
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  
    /* Infinite loop */
    while (1)
    {
    }
  }
  #endif
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  