mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-21 07:46:12 +08:00
20f9a2a1d5
2. Mifare read sector (via 1) 3. Mifare write block 4. fixed several bugs in iso 14443 select added Issue 23 Issue 26
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
//-----------------------------------------------------------------------------
|
|
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
|
|
// at your option, any later version. See the LICENSE.txt file for the text of
|
|
// the license.
|
|
//-----------------------------------------------------------------------------
|
|
// ISO15693 CRC & other commons
|
|
//-----------------------------------------------------------------------------
|
|
|
|
|
|
#include "proxmark3.h"
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
//#include "iso15693tools.h"
|
|
|
|
// The CRC as described in ISO 15693-Part 3-Annex C
|
|
// v buffer with data
|
|
// n length
|
|
// returns crc as 16bit value
|
|
uint16_t Iso15693Crc(uint8_t *v, int n)
|
|
{
|
|
uint32_t reg;
|
|
int i, j;
|
|
|
|
reg = 0xffff;
|
|
for(i = 0; i < n; i++) {
|
|
reg = reg ^ ((uint32_t)v[i]);
|
|
for (j = 0; j < 8; j++) {
|
|
if (reg & 0x0001) {
|
|
reg = (reg >> 1) ^ 0x8408;
|
|
} else {
|
|
reg = (reg >> 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
return ~(uint16_t)(reg & 0xffff);
|
|
}
|
|
|
|
// adds a CRC to a dataframe
|
|
// req[] iso15963 frame without crc
|
|
// n length without crc
|
|
// returns the new length of the dataframe.
|
|
int Iso15693AddCrc(uint8_t *req, int n) {
|
|
uint16_t crc=Iso15693Crc(req,n);
|
|
req[n] = crc & 0xff;
|
|
req[n+1] = crc >> 8;
|
|
return n+2;
|
|
}
|
|
|
|
|
|
int sprintf(char *str, const char *format, ...);
|
|
|
|
// returns a string representation of the UID
|
|
// UID is transmitted and stored LSB first, displayed MSB first
|
|
// target char* buffer, where to put the UID, if NULL a static buffer is returned
|
|
// uid[] the UID in transmission order
|
|
// return: ptr to string
|
|
char* Iso15693sprintUID(char *target,uint8_t *uid) {
|
|
static char tempbuf[2*8+1]="";
|
|
if (target==NULL) target=tempbuf;
|
|
sprintf(target,"%02hX%02hX%02hX%02hX%02hX%02hX%02hX%02hX",
|
|
uid[7],uid[6],uid[5],uid[4],uid[3],uid[2],uid[1],uid[0]);
|
|
return target;
|
|
}
|
|
|
|
|
|
|