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/*
* Author: Copyright (C) Andrzej Surowiec 2012
*
*
* This file is part of Nitrokey.
*
* Nitrokey is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* Nitrokey is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Nitrokey. If not, see <http://www.gnu.org/licenses/>.
*/
#include "crc32.h"
uint32_t Crc32 (uint32_t Crc, uint32_t Data)
{
int i;
Crc = Crc ^ Data;
for (i = 0; i < 32; i++)
if (Crc & 0x80000000)
Crc = (Crc << 1) ^ 0x04C11DB7; // Polynomial used in STM32
else
Crc = (Crc << 1);
return (Crc);
}
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