/**
* @brief This function handles TIM6 global interrupt request.
* @param None
* @retval None
*/
void TIM6_DAC_IRQHandler(void)
{
if (TIM_GetITStatus(TIM6, TIM_IT_Update) != RESET)
{
/*=============================================================================
Save MD5 Digest Computation context
==============================================================================*/
HASH_SaveContext(&Md5Context);
ContextSwapCounter++;
/*=============================================================================
SHA1 Digest Computation
==============================================================================*/
HASH_SHA1((uint8_t*)Sha1Input, SHA1_INPUT_TAB_SIZE, Sha1output);
/*=============================================================================
Restore MD5 Digest Computation context
==============================================================================*/
HASH_RestoreContext(&Md5Context);
TIM_ClearITPendingBit(TIM6, TIM_IT_Update);
}
}
/*
* SHA-1 process buffer
*/
void sha1_update( sha1_context *ctx, const unsigned char *input, size_t ilen )
{
/*
unsigned char* constRespect; // Used to respect the const qualifier :(
constRespect = pvPortMalloc(ilen); //
memcpy(constRespect, input, ilen); //
if(HASH_SHA1(constRespect, ilen, ctx->buffer) == ERROR) // Stores the digest in ctx.buffer
printf("ERROR in HASH_SHA1 function.");
vPortFree(constRespect);
*/
if( HASH_SHA1( (unsigned char*) input, ilen, ctx->buffer) == ERROR) // Stores the digest in ctx.buffer
printf("ERROR in HASH_SHA1 function.");
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f4xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f4xx.c file
*/
/* USART configuration */
USART_Config();
/* Display the original message */
Display_MainMessage(INPUT_TAB_SIZE);
/* Enable HASH clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_HASH, ENABLE);
/*=============================================================================
SHA-1 Digest Computation
==============================================================================*/
/* SHA-1 Digest Computation */
HASH_SHA1((uint8_t *)Input, INPUT_TAB_SIZE, Sha1output);
/* Display the SHA1 digest */
Display_SHA1Digest();
/*=============================================================================
MD5 Digest Computation
==============================================================================*/
/* MD5 Digest Computation */
HASH_MD5((uint8_t *)Input, INPUT_TAB_SIZE, Md5output);
/* Display the MD5 digest */
Display_MD5Digest();
while(1);
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
files (startup_stm32f40_41xxx.s/startup_stm32f427_437xx.s/startup_stm32f429_439xx.s)
before to branch to application main.
*/
/* TIM6 configuration to get a regular interrupt */
TIM6_Config();
/* USART configuration */
USART_Config();
/* Display the original message */
Display_MainMessage();
/* Enable HASH clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_HASH, ENABLE);
/*=============================================================================
SHA1/ MD5 Digest Computation without context swap
==============================================================================*/
printf("\n\r>> MD5 Digest Computation without context swap \n\r");
printf(">>> Start \n\r");
/* MD5 Digest Computation *******************************/
HASH_MD5((uint8_t*)Md5Input, MD5_INPUT_TAB_SIZE,Md5output);
printf(">>> Done \n\r");
/* Display the MD5 digest */
Display_MD5Digest();
printf("\n\r>> SHA1 Digest Computation without context swap \n\r");
printf(">>> Start \n\r");
/* SHA1 Digest Computation */
HASH_SHA1((uint8_t*)Sha1Input, SHA1_INPUT_TAB_SIZE, Sha1output);
printf(">>> Done \n\r");
/* Display the SHA1 digest */
Display_SHA1Digest();
/*=============================================================================
SHA1 / MD5 Digest Computation with context swap
==============================================================================*/
printf("\n\r>> MD5 Digest Computation with context swap \n\r");
printf(">>> Start \n\r");
/* Enable TIM6 */
TIM_Cmd(TIM6, ENABLE);
/* MD5 Digest Computation */
HASH_MD5((uint8_t*)Md5Input, MD5_INPUT_TAB_SIZE, Md5output);
/* Disable TIM2 : no more interrupts */
TIM_Cmd(TIM6, DISABLE);
printf(" ====> During MD5 digest calculation, the context is saved and restored (%d) times to calculate the SHA1 digest \n\r", ContextSwapCounter);
printf(">>> Done \n\r");
/* Display the MD5 digest */
Display_MD5Digest();
printf(">> SHA1 Digest computed during MD5 context swap \n\r");
/* Display the SHA1 digest */
Display_SHA1Digest();
while(1);
}