--- /dev/null
+/**
+ ******************************************************************************
+ * @file stm32f4xx_hash.c
+ * @author MCD Application Team
+ * @version V1.0.0RC1
+ * @date 25-August-2011
+ * @brief This file provides firmware functions to manage the following
+ * functionalities of the HASH / HMAC Processor (HASH) peripheral:
+ * - Initialization and Configuration functions
+ * - Message Digest generation functions
+ * - context swapping functions
+ * - DMA interface function
+ * - Interrupts and flags management
+ *
+ * @verbatim
+ *
+ * ===================================================================
+ * How to use this driver
+ * ===================================================================
+ * HASH operation :
+ * ----------------
+ * 1. Enable the HASH controller clock using
+ * RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_HASH, ENABLE) function.
+ *
+ * 2. Initialise the HASH using HASH_Init() function.
+ *
+ * 3 . Reset the HASH processor core, so that the HASH will be ready
+ * to compute he message digest of a new message by using
+ * HASH_Reset() function.
+ *
+ * 4. Enable the HASH controller using the HASH_Cmd() function.
+ *
+ * 5. if using DMA for Data input transfer, Activate the DMA Request
+ * using HASH_DMACmd() function
+ *
+ * 6. if DMA is not used for data transfer, use HASH_DataIn() function
+ * to enter data to IN FIFO.
+ *
+ *
+ * 7. Configure the Number of valid bits in last word of the message
+ * using HASH_SetLastWordValidBitsNbr() function.
+ *
+ * 8. if the message length is not an exact multiple of 512 bits,
+ * then the function HASH_StartDigest() must be called to
+ * launch the computation of the final digest.
+ *
+ * 9. Once computed, the digest can be read using HASH_GetDigest()
+ * function.
+ *
+ * 10. To control HASH events you can use one of the following
+ * two methods:
+ * a- Check on HASH flags using the HASH_GetFlagStatus() function.
+ * b- Use HASH interrupts through the function HASH_ITConfig() at
+ * initialization phase and HASH_GetITStatus() function into
+ * interrupt routines in hashing phase.
+ * After checking on a flag you should clear it using HASH_ClearFlag()
+ * function. And after checking on an interrupt event you should
+ * clear it using HASH_ClearITPendingBit() function.
+ *
+ * 11. Save and restore hash processor context using
+ * HASH_SaveContext() and HASH_RestoreContext() functions.
+ *
+ *
+ *
+ * HMAC operation :
+ * ----------------
+ * The HMAC algorithm is used for message authentication, by
+ * irreversibly binding the message being processed to a key chosen
+ * by the user.
+ * For HMAC specifications, refer to "HMAC: keyed-hashing for message
+ * authentication, H. Krawczyk, M. Bellare, R. Canetti, February 1997"
+ *
+ * Basically, the HMAC algorithm consists of two nested hash operations:
+ * HMAC(message) = Hash[((key | pad) XOR 0x5C) | Hash(((key | pad) XOR 0x36) | message)]
+ * where:
+ * - "pad" is a sequence of zeroes needed to extend the key to the
+ * length of the underlying hash function data block (that is
+ * 512 bits for both the SHA-1 and MD5 hash algorithms)
+ * - "|" represents the concatenation operator
+ *
+ *
+ * To compute the HMAC, four different phases are required:
+ *
+ * 1. Initialise the HASH using HASH_Init() function to do HMAC
+ * operation.
+ *
+ * 2. The key (to be used for the inner hash function) is then given
+ * to the core. This operation follows the same mechanism as the
+ * one used to send the message in the hash operation (that is,
+ * by HASH_DataIn() function and, finally,
+ * HASH_StartDigest() function.
+ *
+ * 3. Once the last word has been entered and computation has started,
+ * the hash processor elaborates the key. It is then ready to
+ * accept the message text using the same mechanism as the one
+ * used to send the message in the hash operation.
+ *
+ * 4. After the first hash round, the hash processor returns "ready"
+ * to indicate that it is ready to receive the key to be used for
+ * the outer hash function (normally, this key is the same as the
+ * one used for the inner hash function). When the last word of
+ * the key is entered and computation starts, the HMAC result is
+ * made available using HASH_GetDigest() 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_hash.h"
+#include "stm32f4xx_rcc.h"
+
+/** @addtogroup STM32F4xx_StdPeriph_Driver
+ * @{
+ */
+
+/** @defgroup HASH
+ * @brief HASH driver modules
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup HASH_Private_Functions
+ * @{
+ */
+
+/** @defgroup HASH_Group1 Initialization and Configuration functions
+ * @brief Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ Initialization and Configuration functions
+ ===============================================================================
+ This section provides functions allowing to
+ - Initialize the HASH peripheral
+ - Configure the HASH Processor
+ - MD5/SHA1,
+ - HASH/HMAC,
+ - datatype
+ - HMAC Key (if mode = HMAC)
+ - Reset the HASH Processor
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Deinitializes the HASH peripheral registers to their default reset values
+ * @param None
+ * @retval None
+ */
+void HASH_DeInit(void)
+{
+ /* Enable HASH reset state */
+ RCC_AHB2PeriphResetCmd(RCC_AHB2Periph_HASH, ENABLE);
+ /* Release HASH from reset state */
+ RCC_AHB2PeriphResetCmd(RCC_AHB2Periph_HASH, DISABLE);
+}
+
+/**
+ * @brief Initializes the HASH peripheral according to the specified parameters
+ * in the HASH_InitStruct structure.
+ * @note the hash processor is reset when calling this function so that the
+ * HASH will be ready to compute the message digest of a new message.
+ * There is no need to call HASH_Reset() function.
+ * @param HASH_InitStruct: pointer to a HASH_InitTypeDef structure that contains
+ * the configuration information for the HASH peripheral.
+ * @note The field HASH_HMACKeyType in HASH_InitTypeDef must be filled only
+ * if the algorithm mode is HMAC.
+ * @retval None
+ */
+void HASH_Init(HASH_InitTypeDef* HASH_InitStruct)
+{
+ /* Check the parameters */
+ assert_param(IS_HASH_ALGOSELECTION(HASH_InitStruct->HASH_AlgoSelection));
+ assert_param(IS_HASH_DATATYPE(HASH_InitStruct->HASH_DataType));
+ assert_param(IS_HASH_ALGOMODE(HASH_InitStruct->HASH_AlgoMode));
+
+ /* Configure the Algorithm used, algorithm mode and the datatype */
+ HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
+ HASH->CR |= (HASH_InitStruct->HASH_AlgoSelection | \
+ HASH_InitStruct->HASH_DataType | \
+ HASH_InitStruct->HASH_AlgoMode);
+
+ /* if algorithm mode is HMAC, set the Key */
+ if(HASH_InitStruct->HASH_AlgoMode == HASH_AlgoMode_HMAC)
+ {
+ assert_param(IS_HASH_HMAC_KEYTYPE(HASH_InitStruct->HASH_HMACKeyType));
+ HASH->CR &= ~HASH_CR_LKEY;
+ HASH->CR |= HASH_InitStruct->HASH_HMACKeyType;
+ }
+
+ /* Reset the HASH processor core, so that the HASH will be ready to compute
+ the message digest of a new message */
+ HASH->CR |= HASH_CR_INIT;
+}
+
+/**
+ * @brief Fills each HASH_InitStruct member with its default value.
+ * @param HASH_InitStruct : pointer to a HASH_InitTypeDef structure which will
+ * be initialized.
+ * @note The default values set are : Processor mode is HASH, Algorithm selected is SHA1,
+ * Data type selected is 32b and HMAC Key Type is short key.
+ * @retval None
+ */
+void HASH_StructInit(HASH_InitTypeDef* HASH_InitStruct)
+{
+ /* Initialize the HASH_AlgoSelection member */
+ HASH_InitStruct->HASH_AlgoSelection = HASH_AlgoSelection_SHA1;
+
+ /* Initialize the HASH_AlgoMode member */
+ HASH_InitStruct->HASH_AlgoMode = HASH_AlgoMode_HASH;
+
+ /* Initialize the HASH_DataType member */
+ HASH_InitStruct->HASH_DataType = HASH_DataType_32b;
+
+ /* Initialize the HASH_HMACKeyType member */
+ HASH_InitStruct->HASH_HMACKeyType = HASH_HMACKeyType_ShortKey;
+}
+
+/**
+ * @brief Resets the HASH processor core, so that the HASH will be ready
+ * to compute the message digest of a new message.
+ * @note Calling this function will clear the HASH_SR_DCIS (Digest calculation
+ * completion interrupt status) bit corresponding to HASH_IT_DCI
+ * interrupt and HASH_FLAG_DCIS flag.
+ * @param None
+ * @retval None
+ */
+void HASH_Reset(void)
+{
+ /* Reset the HASH processor core */
+ HASH->CR |= HASH_CR_INIT;
+}
+/**
+ * @}
+ */
+
+/** @defgroup HASH_Group2 Message Digest generation functions
+ * @brief Message Digest generation functions
+ *
+@verbatim
+ ===============================================================================
+ Message Digest generation functions
+ ===============================================================================
+ This section provides functions allowing the generation of message digest:
+ - Push data in the IN FIFO : using HASH_DataIn()
+ - Get the number of words set in IN FIFO, use HASH_GetInFIFOWordsNbr()
+ - set the last word valid bits number using HASH_SetLastWordValidBitsNbr()
+ - start digest calculation : using HASH_StartDigest()
+ - Get the Digest message : using HASH_GetDigest()
+
+@endverbatim
+ * @{
+ */
+
+
+/**
+ * @brief Configure the Number of valid bits in last word of the message
+ * @param ValidNumber: Number of valid bits in last word of the message.
+ * This parameter must be a number between 0 and 0x1F.
+ * - 0x00: All 32 bits of the last data written are valid
+ * - 0x01: Only bit [0] of the last data written is valid
+ * - 0x02: Only bits[1:0] of the last data written are valid
+ * - 0x03: Only bits[2:0] of the last data written are valid
+ * - ...
+ * - 0x1F: Only bits[30:0] of the last data written are valid
+ * @note The Number of valid bits must be set before to start the message
+ * digest competition (in Hash and HMAC) and key treatment(in HMAC).
+ * @retval None
+ */
+void HASH_SetLastWordValidBitsNbr(uint16_t ValidNumber)
+{
+ /* Check the parameters */
+ assert_param(IS_HASH_VALIDBITSNUMBER(ValidNumber));
+
+ /* Configure the Number of valid bits in last word of the message */
+ HASH->STR &= ~(HASH_STR_NBW);
+ HASH->STR |= ValidNumber;
+}
+
+/**
+ * @brief Writes data in the Data Input FIFO
+ * @param Data: new data of the message to be processed.
+ * @retval None
+ */
+void HASH_DataIn(uint32_t Data)
+{
+ /* Write in the DIN register a new data */
+ HASH->DIN = Data;
+}
+
+/**
+ * @brief Returns the number of words already pushed into the IN FIFO.
+ * @param None
+ * @retval The value of words already pushed into the IN FIFO.
+ */
+uint8_t HASH_GetInFIFOWordsNbr(void)
+{
+ /* Return the value of NBW bits */
+ return ((HASH->CR & HASH_CR_NBW) >> 8);
+}
+
+/**
+ * @brief Provides the message digest result.
+ * @note In MD5 mode, Data[4] filed of HASH_MsgDigest structure is not used
+ * and is read as zero.
+ * @param HASH_MessageDigest: pointer to a HASH_MsgDigest structure which will
+ * hold the message digest result
+ * @retval None
+ */
+void HASH_GetDigest(HASH_MsgDigest* HASH_MessageDigest)
+{
+ /* Get the data field */
+ HASH_MessageDigest->Data[0] = HASH->HR[0];
+ HASH_MessageDigest->Data[1] = HASH->HR[1];
+ HASH_MessageDigest->Data[2] = HASH->HR[2];
+ HASH_MessageDigest->Data[3] = HASH->HR[3];
+ HASH_MessageDigest->Data[4] = HASH->HR[4];
+}
+
+/**
+ * @brief Starts the message padding and calculation of the final message
+ * @param None
+ * @retval None
+ */
+void HASH_StartDigest(void)
+{
+ /* Start the Digest calculation */
+ HASH->STR |= HASH_STR_DCAL;
+}
+/**
+ * @}
+ */
+
+/** @defgroup HASH_Group3 Context swapping functions
+ * @brief Context swapping functions
+ *
+@verbatim
+ ===============================================================================
+ Context swapping functions
+ ===============================================================================
+
+ This section provides functions allowing to save and store HASH Context
+
+ It is possible to interrupt a HASH/HMAC process to perform another processing
+ with a higher priority, and to complete the interrupted process later on, when
+ the higher priority task is complete. To do so, the context of the interrupted
+ task must be saved from the HASH registers to memory, and then be restored
+ from memory to the HASH registers.
+
+ 1. To save the current context, use HASH_SaveContext() function
+ 2. To restore the saved context, use HASH_RestoreContext() function
+
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Save the Hash peripheral Context.
+ * @note The context can be saved only when no block is currently being
+ * processed. So user must wait for DINIS = 1 (the last block has been
+ * processed and the input FIFO is empty) or NBW != 0 (the FIFO is not
+ * full and no processing is ongoing).
+ * @param HASH_ContextSave: pointer to a HASH_Context structure that contains
+ * the repository for current context.
+ * @retval None
+ */
+void HASH_SaveContext(HASH_Context* HASH_ContextSave)
+{
+ uint8_t i = 0;
+
+ /* save context registers */
+ HASH_ContextSave->HASH_IMR = HASH->IMR;
+ HASH_ContextSave->HASH_STR = HASH->STR;
+ HASH_ContextSave->HASH_CR = HASH->CR;
+ for(i=0; i<=50;i++)
+ {
+ HASH_ContextSave->HASH_CSR[i] = HASH->CSR[i];
+ }
+}
+
+/**
+ * @brief Restore the Hash peripheral Context.
+ * @note After calling this function, user can restart the processing from the
+ * point where it has been interrupted.
+ * @param HASH_ContextRestore: pointer to a HASH_Context structure that contains
+ * the repository for saved context.
+ * @retval None
+ */
+void HASH_RestoreContext(HASH_Context* HASH_ContextRestore)
+{
+ uint8_t i = 0;
+
+ /* restore context registers */
+ HASH->IMR = HASH_ContextRestore->HASH_IMR;
+ HASH->STR = HASH_ContextRestore->HASH_STR;
+ HASH->CR = HASH_ContextRestore->HASH_CR;
+
+ /* Initialize the hash processor */
+ HASH->CR |= HASH_CR_INIT;
+
+ /* continue restoring context registers */
+ for(i=0; i<=50;i++)
+ {
+ HASH->CSR[i] = HASH_ContextRestore->HASH_CSR[i];
+ }
+}
+/**
+ * @}
+ */
+
+/** @defgroup HASH_Group4 HASH's DMA interface Configuration function
+ * @brief HASH's DMA interface Configuration function
+ *
+@verbatim
+ ===============================================================================
+ HASH's DMA interface Configuration function
+ ===============================================================================
+
+ This section provides functions allowing to configure the DMA interface for
+ HASH/ HMAC data input transfer.
+
+ When the DMA mode is enabled (using the HASH_DMACmd() function), data can be
+ sent to the IN FIFO using the DMA peripheral.
+
+
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Enables or disables the HASH DMA interface.
+ * @note The DMA is disabled by hardware after the end of transfer.
+ * @param NewState: new state of the selected HASH DMA transfer request.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void HASH_DMACmd(FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the HASH DMA request */
+ HASH->CR |= HASH_CR_DMAE;
+ }
+ else
+ {
+ /* Disable the HASH DMA request */
+ HASH->CR &= ~HASH_CR_DMAE;
+ }
+}
+/**
+ * @}
+ */
+
+/** @defgroup HASH_Group5 Interrupts and flags management functions
+ * @brief Interrupts and flags management functions
+ *
+@verbatim
+ ===============================================================================
+ Interrupts and flags management functions
+ ===============================================================================
+
+ This section provides functions allowing to configure the HASH Interrupts and
+ to get the status and clear flags and Interrupts pending bits.
+
+ The HASH provides 2 Interrupts sources and 5 Flags:
+
+ Flags :
+ ----------
+ 1. HASH_FLAG_DINIS : set when 16 locations are free in the Data IN FIFO
+ which means that a new block (512 bit) can be entered
+ into the input buffer.
+
+ 2. HASH_FLAG_DCIS : set when Digest calculation is complete
+
+ 3. HASH_FLAG_DMAS : set when HASH's DMA interface is enabled (DMAE=1) or
+ a transfer is ongoing.
+ This Flag is cleared only by hardware.
+
+ 4. HASH_FLAG_BUSY : set when The hash core is processing a block of data
+ This Flag is cleared only by hardware.
+
+ 5. HASH_FLAG_DINNE : set when Data IN FIFO is not empty which means that
+ the Data IN FIFO contains at least one word of data.
+ This Flag is cleared only by hardware.
+
+ Interrupts :
+ ------------
+
+ 1. HASH_IT_DINI : if enabled, this interrupt source is pending when 16
+ locations are free in the Data IN FIFO which means that
+ a new block (512 bit) can be entered into the input buffer.
+ This interrupt source is cleared using
+ HASH_ClearITPendingBit(HASH_IT_DINI) function.
+
+ 2. HASH_IT_DCI : if enabled, this interrupt source is pending when Digest
+ calculation is complete.
+ This interrupt source is cleared using
+ HASH_ClearITPendingBit(HASH_IT_DCI) function.
+
+ Managing the HASH controller events :
+ ------------------------------------
+ The user should identify which mode will be used in his application to manage
+ the HASH controller events: Polling mode or Interrupt mode.
+
+ 1. In the Polling Mode it is advised to use the following functions:
+ - HASH_GetFlagStatus() : to check if flags events occur.
+ - HASH_ClearFlag() : to clear the flags events.
+
+ 2. In the Interrupt Mode it is advised to use the following functions:
+ - HASH_ITConfig() : to enable or disable the interrupt source.
+ - HASH_GetITStatus() : to check if Interrupt occurs.
+ - HASH_ClearITPendingBit() : to clear the Interrupt pending Bit
+ (corresponding Flag).
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Enables or disables the specified HASH interrupts.
+ * @param HASH_IT: specifies the HASH interrupt source to be enabled or disabled.
+ * This parameter can be any combination of the following values:
+ * @arg HASH_IT_DINI: Data Input interrupt
+ * @arg HASH_IT_DCI: Digest Calculation Completion Interrupt
+ * @param NewState: new state of the specified HASH interrupt.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void HASH_ITConfig(uint8_t HASH_IT, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_HASH_IT(HASH_IT));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the selected HASH interrupt */
+ HASH->IMR |= HASH_IT;
+ }
+ else
+ {
+ /* Disable the selected HASH interrupt */
+ HASH->IMR &= (uint8_t) ~HASH_IT;
+ }
+}
+
+/**
+ * @brief Checks whether the specified HASH flag is set or not.
+ * @param HASH_FLAG: specifies the HASH flag to check.
+ * This parameter can be one of the following values:
+ * @arg HASH_FLAG_DINIS: Data input interrupt status flag
+ * @arg HASH_FLAG_DCIS: Digest calculation completion interrupt status flag
+ * @arg HASH_FLAG_BUSY: Busy flag
+ * @arg HASH_FLAG_DMAS: DMAS Status flag
+ * @arg HASH_FLAG_DINNE: Data Input register (DIN) not empty status flag
+ * @retval The new state of HASH_FLAG (SET or RESET)
+ */
+FlagStatus HASH_GetFlagStatus(uint16_t HASH_FLAG)
+{
+ FlagStatus bitstatus = RESET;
+ uint32_t tempreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_HASH_GET_FLAG(HASH_FLAG));
+
+ /* check if the FLAG is in CR register */
+ if ((HASH_FLAG & HASH_FLAG_DINNE) != (uint16_t)RESET )
+ {
+ tempreg = HASH->CR;
+ }
+ else /* The FLAG is in SR register */
+ {
+ tempreg = HASH->SR;
+ }
+
+ /* Check the status of the specified HASH flag */
+ if ((tempreg & HASH_FLAG) != (uint16_t)RESET)
+ {
+ /* HASH is set */
+ bitstatus = SET;
+ }
+ else
+ {
+ /* HASH_FLAG is reset */
+ bitstatus = RESET;
+ }
+
+ /* Return the HASH_FLAG status */
+ return bitstatus;
+}
+/**
+ * @brief Clears the HASH flags.
+ * @param HASH_FLAG: specifies the flag to clear.
+ * This parameter can be any combination of the following values:
+ * @arg HASH_FLAG_DINIS: Data Input Flag
+ * @arg HASH_FLAG_DCIS: Digest Calculation Completion Flag
+ * @retval None
+ */
+void HASH_ClearFlag(uint16_t HASH_FLAG)
+{
+ /* Check the parameters */
+ assert_param(IS_HASH_CLEAR_FLAG(HASH_FLAG));
+
+ /* Clear the selected HASH flags */
+ HASH->SR = ~(uint32_t)HASH_FLAG;
+}
+/**
+ * @brief Checks whether the specified HASH interrupt has occurred or not.
+ * @param HASH_IT: specifies the HASH interrupt source to check.
+ * This parameter can be one of the following values:
+ * @arg HASH_IT_DINI: Data Input interrupt
+ * @arg HASH_IT_DCI: Digest Calculation Completion Interrupt
+ * @retval The new state of HASH_IT (SET or RESET).
+ */
+ITStatus HASH_GetITStatus(uint8_t HASH_IT)
+{
+ ITStatus bitstatus = RESET;
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_HASH_GET_IT(HASH_IT));
+
+
+ /* Check the status of the specified HASH interrupt */
+ tmpreg = HASH->SR;
+
+ if (((HASH->IMR & tmpreg) & HASH_IT) != RESET)
+ {
+ /* HASH_IT is set */
+ bitstatus = SET;
+ }
+ else
+ {
+ /* HASH_IT is reset */
+ bitstatus = RESET;
+ }
+ /* Return the HASH_IT status */
+ return bitstatus;
+}
+
+/**
+ * @brief Clears the HASH interrupt pending bit(s).
+ * @param HASH_IT: specifies the HASH interrupt pending bit(s) to clear.
+ * This parameter can be any combination of the following values:
+ * @arg HASH_IT_DINI: Data Input interrupt
+ * @arg HASH_IT_DCI: Digest Calculation Completion Interrupt
+ * @retval None
+ */
+void HASH_ClearITPendingBit(uint8_t HASH_IT)
+{
+ /* Check the parameters */
+ assert_param(IS_HASH_IT(HASH_IT));
+
+ /* Clear the selected HASH interrupt pending bit */
+ HASH->SR = (uint8_t)~HASH_IT;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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