78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Daniel Campora
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include "inc/hw_types.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_nvic.h"
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#include "inc/hw_shamd5.h"
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#include "inc/hw_dthe.h"
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#include "hw_memmap.h"
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#include "rom_map.h"
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#include "prcm.h"
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#include "shamd5.h"
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#include "cryptohash.h"
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/******************************************************************************
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DEFINE PUBLIC FUNCTIONS
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******************************************************************************/
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__attribute__ ((section (".boot")))
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void CRYPTOHASH_Init (void) {
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// Enable the Data Hashing and Transform Engine
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MAP_PRCMPeripheralClkEnable(PRCM_DTHE, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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MAP_PRCMPeripheralReset(PRCM_DTHE);
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}
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void CRYPTOHASH_SHAMD5Start (uint32_t algo, uint32_t blocklen) {
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// wait until the context is ready
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while ((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_CONTEXT_READY) == 0);
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// Configure the SHA/MD5 module algorithm
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MAP_SHAMD5ConfigSet(SHAMD5_BASE, algo);
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// if not a multiple of 64 bytes, close the hash
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if (blocklen % 64) {
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HWREG(SHAMD5_BASE + SHAMD5_O_MODE) |= SHAMD5_MODE_CLOSE_HASH;
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}
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// set the lenght
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HWREG(SHAMD5_BASE + SHAMD5_O_LENGTH) = blocklen;
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}
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void CRYPTOHASH_SHAMD5Update (uint8_t *data, uint32_t datalen) {
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// write the data
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SHAMD5DataWriteMultiple(data, datalen);
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}
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void CRYPTOHASH_SHAMD5Read (uint8_t *hash) {
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// wait for the output to be ready
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while((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_OUTPUT_READY) == 0);
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// read the result
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MAP_SHAMD5ResultRead(SHAMD5_BASE, hash);
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}
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