cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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crc32hash.c (702B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
      3/* Usage example:
      4$ ./crc32hash "Dual Speed"
      5*/
      6
      7#include <string.h>
      8#include <stdio.h>
      9#include <ctype.h>
     10#include <stdlib.h>
     11
     12static unsigned int crc32(unsigned char const *p, unsigned int len)
     13{
     14	int i;
     15	unsigned int crc = 0;
     16	while (len--) {
     17		crc ^= *p++;
     18		for (i = 0; i < 8; i++)
     19			crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
     20	}
     21	return crc;
     22}
     23
     24int main(int argc, char **argv) {
     25	unsigned int result;
     26	if (argc != 2) {
     27		printf("no string passed as argument\n");
     28		return -1;
     29	}
     30	result = crc32((unsigned char const *)argv[1], strlen(argv[1]));
     31	printf("0x%x\n", result);
     32	return 0;
     33}