--- /dev/null
+/**
+ ******************************************************************************
+ * @file stm32f4xx_cryp_tdes.c
+ * @author MCD Application Team
+ * @version V1.0.0RC1
+ * @date 25-August-2011
+ * @brief This file provides high level functions to encrypt and decrypt an
+ * input message using TDES in ECB/CBC modes .
+ * It uses the stm32f4xx_cryp.c/.h drivers to access the STM32F4xx CRYP
+ * peripheral.
+ *
+ * @verbatim
+ *
+ * ===================================================================
+ * How to use this driver
+ * ===================================================================
+ * 1. Enable The CRYP controller clock using
+ * RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_CRYP, ENABLE); function.
+ *
+ * 2. Encrypt and decrypt using TDES in ECB Mode using CRYP_TDES_ECB()
+ * function.
+ *
+ * 3. Encrypt and decrypt using TDES in CBC Mode using CRYP_TDES_CBC()
+ * function.
+ *
+ * @endverbatim
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+ *
+ * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_cryp.h"
+
+
+/** @addtogroup STM32F4xx_StdPeriph_Driver
+ * @{
+ */
+
+/** @defgroup CRYP
+ * @brief CRYP driver modules
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define TDESBUSY_TIMEOUT ((uint32_t) 0x00010000)
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+
+/** @defgroup CRYP_Private_Functions
+ * @{
+ */
+
+/** @defgroup CRYP_Group7 High Level TDES functions
+ * @brief High Level TDES functions
+ *
+@verbatim
+ ===============================================================================
+ High Level TDES functions
+ ===============================================================================
+
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Encrypt and decrypt using TDES in ECB Mode
+ * @param Mode: encryption or decryption Mode.
+ * This parameter can be one of the following values:
+ * @arg MODE_ENCRYPT: Encryption
+ * @arg MODE_DECRYPT: Decryption
+ * @param Key: Key used for TDES algorithm.
+ * @param Ilength: length of the Input buffer, must be a multiple of 8.
+ * @param Input: pointer to the Input buffer.
+ * @param Output: pointer to the returned buffer.
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: Operation done
+ * - ERROR: Operation failed
+ */
+ErrorStatus CRYP_TDES_ECB(uint8_t Mode, uint8_t Key[24], uint8_t *Input,
+ uint32_t Ilength, uint8_t *Output)
+{
+ CRYP_InitTypeDef TDES_CRYP_InitStructure;
+ CRYP_KeyInitTypeDef TDES_CRYP_KeyInitStructure;
+ __IO uint32_t counter = 0;
+ uint32_t busystatus = 0;
+ ErrorStatus status = SUCCESS;
+ uint32_t keyaddr = (uint32_t)Key;
+ uint32_t inputaddr = (uint32_t)Input;
+ uint32_t outputaddr = (uint32_t)Output;
+ uint32_t i = 0;
+
+ /* Crypto structures initialisation*/
+ CRYP_KeyStructInit(&TDES_CRYP_KeyInitStructure);
+
+ /* Crypto Init for Encryption process */
+ if(Mode == MODE_ENCRYPT) /* TDES encryption */
+ {
+ TDES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
+ }
+ else /*if(Mode == MODE_DECRYPT)*/ /* TDES decryption */
+ {
+ TDES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
+ }
+
+ TDES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_TDES_ECB;
+ TDES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b;
+ CRYP_Init(&TDES_CRYP_InitStructure);
+
+ /* Key Initialisation */
+ TDES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr));
+ CRYP_KeyInit(& TDES_CRYP_KeyInitStructure);
+
+ /* Flush IN/OUT FIFO */
+ CRYP_FIFOFlush();
+
+ /* Enable Crypto processor */
+ CRYP_Cmd(ENABLE);
+
+ for(i=0; ((i<Ilength) && (status != ERROR)); i+=8)
+ {
+ /* Write the Input block in the Input FIFO */
+ CRYP_DataIn(*(uint32_t*)(inputaddr));
+ inputaddr+=4;
+ CRYP_DataIn(*(uint32_t*)(inputaddr));
+ inputaddr+=4;
+
+ /* Wait until the complete message has been processed */
+ counter = 0;
+ do
+ {
+ busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY);
+ counter++;
+ }while ((counter != TDESBUSY_TIMEOUT) && (busystatus != RESET));
+
+ if (busystatus != RESET)
+ {
+ status = ERROR;
+ }
+ else
+ {
+
+ /* Read the Output block from the Output FIFO */
+ *(uint32_t*)(outputaddr) = CRYP_DataOut();
+ outputaddr+=4;
+ *(uint32_t*)(outputaddr) = CRYP_DataOut();
+ outputaddr+=4;
+ }
+ }
+
+ /* Disable Crypto */
+ CRYP_Cmd(DISABLE);
+
+ return status;
+}
+
+/**
+ * @brief Encrypt and decrypt using TDES in CBC Mode
+ * @param Mode: encryption or decryption Mode.
+ * This parameter can be one of the following values:
+ * @arg MODE_ENCRYPT: Encryption
+ * @arg MODE_DECRYPT: Decryption
+ * @param Key: Key used for TDES algorithm.
+ * @param InitVectors: Initialisation Vectors used for TDES algorithm.
+ * @param Input: pointer to the Input buffer.
+ * @param Ilength: length of the Input buffer, must be a multiple of 8.
+ * @param Output: pointer to the returned buffer.
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: Operation done
+ * - ERROR: Operation failed
+ */
+ErrorStatus CRYP_TDES_CBC(uint8_t Mode, uint8_t Key[24], uint8_t InitVectors[8],
+ uint8_t *Input, uint32_t Ilength, uint8_t *Output)
+{
+ CRYP_InitTypeDef TDES_CRYP_InitStructure;
+ CRYP_KeyInitTypeDef TDES_CRYP_KeyInitStructure;
+ CRYP_IVInitTypeDef TDES_CRYP_IVInitStructure;
+ __IO uint32_t counter = 0;
+ uint32_t busystatus = 0;
+ ErrorStatus status = SUCCESS;
+ uint32_t keyaddr = (uint32_t)Key;
+ uint32_t inputaddr = (uint32_t)Input;
+ uint32_t outputaddr = (uint32_t)Output;
+ uint32_t ivaddr = (uint32_t)InitVectors;
+ uint32_t i = 0;
+
+ /* Crypto structures initialisation*/
+ CRYP_KeyStructInit(&TDES_CRYP_KeyInitStructure);
+
+ /* Crypto Init for Encryption process */
+ if(Mode == MODE_ENCRYPT) /* TDES encryption */
+ {
+ TDES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
+ }
+ else
+ {
+ TDES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
+ }
+ TDES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_TDES_CBC;
+ TDES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b;
+
+ CRYP_Init(&TDES_CRYP_InitStructure);
+
+ /* Key Initialisation */
+ TDES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr));
+ keyaddr+=4;
+ TDES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr));
+ CRYP_KeyInit(& TDES_CRYP_KeyInitStructure);
+
+ /* Initialization Vectors */
+ TDES_CRYP_IVInitStructure.CRYP_IV0Left = __REV(*(uint32_t*)(ivaddr));
+ ivaddr+=4;
+ TDES_CRYP_IVInitStructure.CRYP_IV0Right= __REV(*(uint32_t*)(ivaddr));
+ CRYP_IVInit(&TDES_CRYP_IVInitStructure);
+
+ /* Flush IN/OUT FIFO */
+ CRYP_FIFOFlush();
+
+ /* Enable Crypto processor */
+ CRYP_Cmd(ENABLE);
+
+ for(i=0; ((i<Ilength) && (status != ERROR)); i+=8)
+ {
+ /* Write the Input block in the Input FIFO */
+ CRYP_DataIn(*(uint32_t*)(inputaddr));
+ inputaddr+=4;
+ CRYP_DataIn(*(uint32_t*)(inputaddr));
+ inputaddr+=4;
+
+ /* Wait until the complete message has been processed */
+ counter = 0;
+ do
+ {
+ busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY);
+ counter++;
+ }while ((counter != TDESBUSY_TIMEOUT) && (busystatus != RESET));
+
+ if (busystatus != RESET)
+ {
+ status = ERROR;
+ }
+ else
+ {
+
+ /* Read the Output block from the Output FIFO */
+ *(uint32_t*)(outputaddr) = CRYP_DataOut();
+ outputaddr+=4;
+ *(uint32_t*)(outputaddr) = CRYP_DataOut();
+ outputaddr+=4;
+ }
+ }
+
+ /* Disable Crypto */
+ CRYP_Cmd(DISABLE);
+
+ return status;
+}
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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