324 lines
9.6 KiB
C
324 lines
9.6 KiB
C
/**
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******************************************************************************
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* @file stm32f4xx_hash_sha1.c
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* @author MCD Application Team
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* @version V1.1.0
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* @date 11-January-2013
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* @brief This file provides high level functions to compute the HASH SHA1 and
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* HMAC SHA1 Digest of an input message.
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* It uses the stm32f4xx_hash.c/.h drivers to access the STM32F4xx HASH
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* peripheral.
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*
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@verbatim
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===================================================================
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##### How to use this driver #####
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===================================================================
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[..]
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(#) Enable The HASH controller clock using
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RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_HASH, ENABLE); function.
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(#) Calculate the HASH SHA1 Digest using HASH_SHA1() function.
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(#) Calculate the HMAC SHA1 Digest using HMAC_SHA1() function.
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@endverbatim
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_hash.h"
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/** @addtogroup STM32F4xx_StdPeriph_Driver
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* @{
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*/
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/** @defgroup HASH
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* @brief HASH driver modules
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define SHA1BUSY_TIMEOUT ((uint32_t) 0x00010000)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup HASH_Private_Functions
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* @{
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*/
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/** @defgroup HASH_Group6 High Level SHA1 functions
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* @brief High Level SHA1 Hash and HMAC functions
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*
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@verbatim
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===============================================================================
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##### High Level SHA1 Hash and HMAC functions #####
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Compute the HASH SHA1 digest.
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* @param Input: pointer to the Input buffer to be treated.
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* @param Ilen: length of the Input buffer.
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* @param Output: the returned digest
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: digest computation done
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* - ERROR: digest computation failed
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*/
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ErrorStatus HASH_SHA1(uint8_t *Input, uint32_t Ilen, uint8_t Output[20])
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{
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HASH_InitTypeDef SHA1_HASH_InitStructure;
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HASH_MsgDigest SHA1_MessageDigest;
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__IO uint16_t nbvalidbitsdata = 0;
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uint32_t i = 0;
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__IO uint32_t counter = 0;
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uint32_t busystatus = 0;
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ErrorStatus status = SUCCESS;
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uint32_t inputaddr = (uint32_t)Input;
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uint32_t outputaddr = (uint32_t)Output;
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/* Number of valid bits in last word of the Input data */
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nbvalidbitsdata = 8 * (Ilen % 4);
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/* HASH peripheral initialization */
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HASH_DeInit();
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/* HASH Configuration */
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SHA1_HASH_InitStructure.HASH_AlgoSelection = HASH_AlgoSelection_SHA1;
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SHA1_HASH_InitStructure.HASH_AlgoMode = HASH_AlgoMode_HASH;
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SHA1_HASH_InitStructure.HASH_DataType = HASH_DataType_8b;
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HASH_Init(&SHA1_HASH_InitStructure);
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/* Configure the number of valid bits in last word of the data */
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HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
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/* Write the Input block in the IN FIFO */
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for(i=0; i<Ilen; i+=4)
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{
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HASH_DataIn(*(uint32_t*)inputaddr);
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inputaddr+=4;
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}
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/* Start the HASH processor */
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HASH_StartDigest();
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/* wait until the Busy flag is RESET */
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do
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{
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busystatus = HASH_GetFlagStatus(HASH_FLAG_BUSY);
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counter++;
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}while ((counter != SHA1BUSY_TIMEOUT) && (busystatus != RESET));
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if (busystatus != RESET)
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{
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status = ERROR;
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}
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else
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{
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/* Read the message digest */
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HASH_GetDigest(&SHA1_MessageDigest);
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[0]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[1]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[2]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[3]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[4]);
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}
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return status;
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}
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/**
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* @brief Compute the HMAC SHA1 digest.
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* @param Key: pointer to the Key used for HMAC.
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* @param Keylen: length of the Key used for HMAC.
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* @param Input: pointer to the Input buffer to be treated.
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* @param Ilen: length of the Input buffer.
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* @param Output: the returned digest
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: digest computation done
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* - ERROR: digest computation failed
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*/
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ErrorStatus HMAC_SHA1(uint8_t *Key, uint32_t Keylen, uint8_t *Input,
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uint32_t Ilen, uint8_t Output[20])
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{
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HASH_InitTypeDef SHA1_HASH_InitStructure;
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HASH_MsgDigest SHA1_MessageDigest;
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__IO uint16_t nbvalidbitsdata = 0;
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__IO uint16_t nbvalidbitskey = 0;
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uint32_t i = 0;
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__IO uint32_t counter = 0;
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uint32_t busystatus = 0;
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ErrorStatus status = SUCCESS;
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uint32_t keyaddr = (uint32_t)Key;
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uint32_t inputaddr = (uint32_t)Input;
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uint32_t outputaddr = (uint32_t)Output;
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/* Number of valid bits in last word of the Input data */
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nbvalidbitsdata = 8 * (Ilen % 4);
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/* Number of valid bits in last word of the Key */
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nbvalidbitskey = 8 * (Keylen % 4);
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/* HASH peripheral initialization */
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HASH_DeInit();
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/* HASH Configuration */
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SHA1_HASH_InitStructure.HASH_AlgoSelection = HASH_AlgoSelection_SHA1;
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SHA1_HASH_InitStructure.HASH_AlgoMode = HASH_AlgoMode_HMAC;
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SHA1_HASH_InitStructure.HASH_DataType = HASH_DataType_8b;
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if(Keylen > 64)
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{
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/* HMAC long Key */
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SHA1_HASH_InitStructure.HASH_HMACKeyType = HASH_HMACKeyType_LongKey;
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}
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else
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{
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/* HMAC short Key */
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SHA1_HASH_InitStructure.HASH_HMACKeyType = HASH_HMACKeyType_ShortKey;
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}
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HASH_Init(&SHA1_HASH_InitStructure);
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/* Configure the number of valid bits in last word of the Key */
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HASH_SetLastWordValidBitsNbr(nbvalidbitskey);
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/* Write the Key */
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for(i=0; i<Keylen; i+=4)
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{
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HASH_DataIn(*(uint32_t*)keyaddr);
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keyaddr+=4;
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}
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/* Start the HASH processor */
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HASH_StartDigest();
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/* wait until the Busy flag is RESET */
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do
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{
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busystatus = HASH_GetFlagStatus(HASH_FLAG_BUSY);
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counter++;
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}while ((counter != SHA1BUSY_TIMEOUT) && (busystatus != RESET));
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if (busystatus != RESET)
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{
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status = ERROR;
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}
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else
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{
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/* Configure the number of valid bits in last word of the Input data */
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HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
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/* Write the Input block in the IN FIFO */
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for(i=0; i<Ilen; i+=4)
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{
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HASH_DataIn(*(uint32_t*)inputaddr);
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inputaddr+=4;
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}
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/* Start the HASH processor */
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HASH_StartDigest();
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/* wait until the Busy flag is RESET */
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counter =0;
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do
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{
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busystatus = HASH_GetFlagStatus(HASH_FLAG_BUSY);
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counter++;
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}while ((counter != SHA1BUSY_TIMEOUT) && (busystatus != RESET));
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if (busystatus != RESET)
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{
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status = ERROR;
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}
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else
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{
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/* Configure the number of valid bits in last word of the Key */
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HASH_SetLastWordValidBitsNbr(nbvalidbitskey);
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/* Write the Key */
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keyaddr = (uint32_t)Key;
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for(i=0; i<Keylen; i+=4)
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{
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HASH_DataIn(*(uint32_t*)keyaddr);
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keyaddr+=4;
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}
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/* Start the HASH processor */
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HASH_StartDigest();
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/* wait until the Busy flag is RESET */
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counter =0;
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do
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{
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busystatus = HASH_GetFlagStatus(HASH_FLAG_BUSY);
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counter++;
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}while ((counter != SHA1BUSY_TIMEOUT) && (busystatus != RESET));
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if (busystatus != RESET)
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{
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status = ERROR;
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}
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else
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{
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/* Read the message digest */
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HASH_GetDigest(&SHA1_MessageDigest);
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[0]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[1]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[2]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[3]);
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = __REV(SHA1_MessageDigest.Data[4]);
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}
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}
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}
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return status;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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