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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_nvic.h"
#include "inc/hw_shamd5.h"
#include "inc/hw_dthe.h"
#include "hw_memmap.h"
#include "rom_map.h"
#include "prcm.h"
#include "shamd5.h"
#include "cryptohash.h"
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
void CRYPTOHASH_Init (void) {
// Enable the Data Hashing and Transform Engine
MAP_PRCMPeripheralClkEnable(PRCM_DTHE, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
MAP_PRCMPeripheralReset(PRCM_DTHE);
}
void CRYPTOHASH_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;
}
void CRYPTOHASH_SHAMD5Update (uint8_t *data, uint32_t datalen) {
// write the data
SHAMD5DataWriteMultiple(data, datalen);
}
void CRYPTOHASH_SHAMD5Read (uint8_t *hash) {
// wait for the output to be ready
while((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_OUTPUT_READY) == 0);
// read the result
MAP_SHAMD5ResultRead(SHAMD5_BASE, hash);
}
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