github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-21 13:53:55 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

First check in.

Browse source
This commit is contained in:
iceman1001 2014-09-11 23:23:46 +02:00
commit f38a152863
103 changed files with 10544 additions and 508 deletions
Download patch file Download diff file Expand all files Collapse all files

31
common/iso15693tools.c
View file

@ -7,11 +7,14 @@
//-----------------------------------------------------------------------------
#include "proxmark3.h"
#include "../include/proxmark3.h"
#include <stdint.h>
#include <stdlib.h>
//#include "iso15693tools.h"
#define POLY 0x8408
// The CRC as described in ISO 15693-Part 3-Annex C
// v buffer with data
// n length
@ -63,5 +66,31 @@ char* Iso15693sprintUID(char *target,uint8_t *uid) {
return target;
}
unsigned short iclass_crc16(char *data_p, unsigned short length)
{
unsigned char i;
unsigned int data;
unsigned int crc = 0xffff;
if (length == 0)
return (~crc);
do
{
for (i=0, data=(unsigned int)0xff & *data_p++;
i < 8;
i++, data >>= 1)
{
if ((crc & 0x0001) ^ (data & 0x0001))
crc = (crc >> 1) ^ POLY;
else crc >>= 1;
}
} while (--length);
crc = ~crc;
data = crc;
crc = (crc << 8) | (data >> 8 & 0xff);
crc = crc ^ 0xBC3;
return (crc);
}