void
GenerateHash(unsigned int uiConfig,unsigned char *puiKey1,unsigned char *puiData,
unsigned char *puiResult,unsigned int uiDataLength)
{
//
// Step1: Reset the Module
// Step2: Enable Interrupts
// Step3: Wait for Context Ready Inteerupt
// Step4: Set the Configuration Parameters (Hash Algorithm)
// Step5: Set Key depends on Algorithm
// Step7: Start Hash Generation
//
MAP_PRCMPeripheralReset(PRCM_DTHE);
//
// Clear the flags
//
g_bContextReadyFlag = false;
g_bInputReadyFlag = false;
//
// Enable interrupts.
//
MAP_SHAMD5IntEnable(SHAMD5_BASE, SHAMD5_INT_CONTEXT_READY |
SHAMD5_INT_PARTHASH_READY |
SHAMD5_INT_INPUT_READY |
SHAMD5_INT_OUTPUT_READY);
//
// Wait for the context ready flag.
//
while(!g_bContextReadyFlag)
{
}
//
// Configure the SHA/MD5 module.
//
MAP_SHAMD5ConfigSet(SHAMD5_BASE, uiConfig);
//
// If Keyed Hashing is used, Set Key and start Hash Generation
//
if(uiHMAC)
{
MAP_SHAMD5HMACKeySet(SHAMD5_BASE, puiKey1);
MAP_SHAMD5HMACProcess(SHAMD5_BASE,
puiData,
uiDataLength,
puiResult);
}
else
{
//
// Perform the hashing operation
//
MAP_SHAMD5DataProcess(SHAMD5_BASE, puiData, uiDataLength,
puiResult);
}
}
void HASH_SHAMD5Start (uint32_t algo, uint32_t blocklen) {
// wait until the context is ready
while ((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_CONTEXT_READY) == 0);
// Configure the SHA/MD5 module algorithm
MAP_SHAMD5ConfigSet(SHAMD5_BASE, algo);
// if not a multiple of 64 bytes, close the hash
if (blocklen % 64) {
HWREG(SHAMD5_BASE + SHAMD5_O_MODE) |= SHAMD5_MODE_CLOSE_HASH;
}
// set the lenght
HWREG(SHAMD5_BASE + SHAMD5_O_LENGTH) = blocklen;
}
