//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// 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.
//-----------------------------------------------------------------------------
// Low frequency HID commands
//-----------------------------------------------------------------------------
#include "cmdlfhid.h"
#ifndef BITS
# define BITS 96
#endif
static int CmdHelp(const char *Cmd);
int usage_lf_hid_wiegand(void){
PrintAndLog("This command converts facility code/card number to Wiegand code");
PrintAndLog("Usage: lf hid wiegand [h] [OEM] [FC] [CN]");
PrintAndLog("Options:");
PrintAndLog(" h - This help");
PrintAndLog(" OEM - OEM number / site code");
PrintAndLog(" FC - facility code");
PrintAndLog(" CN - card number");
PrintAndLog("Examples:");
PrintAndLog(" lf hid wiegand 0 101 2001");
return 0;
}
int usage_lf_hid_sim(void){
PrintAndLog("HID Tag simulator");
PrintAndLog("");
PrintAndLog("Usage: lf hid sim [h] [ID]");
PrintAndLog("Options:");
PrintAndLog(" h - This help");
PrintAndLog(" ID - HID id");
PrintAndLog("Examples:");
PrintAndLog(" lf hid sim 224");
return 0;
}
int usage_lf_hid_clone(void){
PrintAndLog("Clone HID to T55x7. Tag must be on antenna. ");
PrintAndLog("");
PrintAndLog("Usage: lf hid clone [h] [ID] <L>");
PrintAndLog("Options:");
PrintAndLog(" h - This help");
PrintAndLog(" ID - HID id");
PrintAndLog(" L - 84bit ID");
PrintAndLog("Examples:");
PrintAndLog(" lf hid clone 224");
PrintAndLog(" lf hid clone 224 L");
return 0;
}
int usage_lf_hid_brute(void){
PrintAndLog("Enables bruteforce of HID readers with specified facility code.");
PrintAndLog("This is a attack against reader. if cardnumber is given, it starts with it and goes up / down one step");
PrintAndLog("if cardnumber is not given, it starts with 1 and goes up to 65535");
PrintAndLog("");
PrintAndLog("Usage: lf hid brute [h] a <format> f <facility-code> c <cardnumber> d <delay>");
PrintAndLog("Options :");
PrintAndLog(" h : This help");
PrintAndLog(" a <format> : 26|33|34|35|37|40|44|84");
PrintAndLog(" f <facility-code> : 8-bit value HID facility code");
PrintAndLog(" c <cardnumber> : (optional) cardnumber to start with, max 65535");
PrintAndLog(" d <delay> : delay betweens attempts in ms. Default 1000ms");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" lf hid brute a 26 f 224");
PrintAndLog(" lf hid brute a 26 f 21 d 2000");
PrintAndLog(" lf hid brute a 26 f 21 c 200 d 2000");
return 0;
}
static int sendPing(void){
UsbCommand ping = {CMD_PING, {1, 2, 3}};
SendCommand(&ping);
SendCommand(&ping);
SendCommand(&ping);
clearCommandBuffer();
UsbCommand resp;
if (WaitForResponseTimeout(CMD_ACK, &resp, 1000))
return 0;
return 1;
}
static bool sendTry(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint32_t delay, uint8_t *bs){
PrintAndLog("Trying FC: %u; CN: %u", fc, cn);
calcWiegand( fmtlen, fc, cn, bs);
uint64_t arg1 = bytebits_to_byte(bs,32);
uint64_t arg2 = bytebits_to_byte(bs+32,32);
UsbCommand c = {CMD_HID_SIM_TAG, {arg1, arg2, 0}};
clearCommandBuffer();
SendCommand(&c);
msleep(delay);
sendPing();
return TRUE;
}
int CmdHIDDemodFSK(const char *Cmd) {
uint8_t findone = ( Cmd[0] == '1' ) ? 1 : 0;
UsbCommand c = {CMD_HID_DEMOD_FSK, {findone, 0 , 0}};
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdHIDSim(const char *Cmd) {
unsigned int hi = 0, lo = 0;
int n = 0, i = 0;
uint8_t ctmp = param_getchar(Cmd, 0);
if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_hid_sim();
while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
hi = (hi << 4) | (lo >> 28);
lo = (lo << 4) | (n & 0xf);
}
PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
PrintAndLog("Press pm3-button to abort simulation");
UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdHIDClone(const char *Cmd) {
uint32_t hi2 = 0, hi = 0, lo = 0;
int n = 0, i = 0;
UsbCommand c;
uint8_t ctmp = param_getchar(Cmd, 0);
if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_hid_clone();
if (strchr(Cmd,'l') != 0) {
while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
hi2 = (hi2 << 4) | (hi >> 28);
hi = (hi << 4) | (lo >> 28);
lo = (lo << 4) | (n & 0xf);
}
PrintAndLog("Cloning tag with long ID %x%08x%08x", hi2, hi, lo);
c.d.asBytes[0] = 1;
} else {
while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
hi = (hi << 4) | (lo >> 28);
lo = (lo << 4) | (n & 0xf);
}
PrintAndLog("Cloning tag with ID %x%08x", hi, lo);
hi2 = 0;
c.d.asBytes[0] = 0;
}
c.cmd = CMD_HID_CLONE_TAG;
c.arg[0] = hi2;
c.arg[1] = hi;
c.arg[2] = lo;
clearCommandBuffer();
SendCommand(&c);
return 0;
}
// struct to handle wiegand
typedef struct {
uint8_t FormatLen;
uint8_t SiteCode;
uint8_t FacilityCode;
uint8_t CardNumber;
uint8_t* Wiegand;
size_t Wiegand_n;
} wiegand_t;
static void addHIDMarker(uint8_t fmtlen, uint8_t *out) {
// temp array
uint8_t arr[BITS];
memset(arr, 0, BITS);
// copy inpu
uint8_t pos = sizeof(arr)-fmtlen;
memcpy(arr+pos, out, fmtlen);
switch(fmtlen) {
case 26:{
// start sentinel, BITS-bit 27 = 1
arr[BITS-27] = 1;
// fmt smaller than 37 used, bit37 = 1
arr[BITS-38] = 1;
memcpy(out, arr, BITS);
break;
}
case 34:
// start sentinel, BITS-bit 27 = 1
arr[BITS-35] = 1;
// fmt smaller than 37 used, bit37 = 1
arr[BITS-38] = 1;
memcpy(out, arr, BITS);
break;
default:break;
}
}
// static void getParity34(uint32_t *hi, uint32_t *lo){
// uint32_t result = 0;
// int i;
// // even parity
// for (i = 7;i >= 0;i--)
// result ^= (*hi >> i) & i;
// for (i = 31;i >= 24;i--)
// result ^= (*lo >> i) & 1;
// *hi |= result << 2;
// // odd parity bit
// result = 0;
// for (i = 23;i >= 1;i--)
// result ^= (*lo >> i) & 1;
// *lo |= !result;
// }
// static void getParity37H(uint32_t *hi, uint32_t *lo){
// uint32_t result = 0;
// int i;
// // even parity
// for (i = 4;i >= 0;i--)
// result ^= (*hi >> i) & 1;
// for (i = 31;i >= 20;i--)
// result ^= (*lo >> i) & 1;
// *hi |= result << 4;
// // odd parity
// result = 0;
// for (i = 19;i >= 1;i--)
// result ^= (*lo >> i) & 1;
// *lo |= result;
// }
//static void calc26(uint16_t fc, uint32_t cardno, uint8_t *out){
static void calc26(uint16_t fc, uint32_t cardno, uint8_t *out){
uint8_t wiegand[24];
num_to_bytebits(fc, 8, wiegand);
num_to_bytebits(cardno, 16, wiegand+8);
wiegand_add_parity(out, wiegand, sizeof(wiegand) );
}
// static void calc33(uint16_t fc, uint32_t cardno, uint8_t *out){
// }
static void calc34(uint16_t fc, uint32_t cardno, uint8_t *out){
uint8_t wiegand[32];
num_to_bytebits(fc, 16, wiegand);
num_to_bytebits(cardno, 16, wiegand + 16);
wiegand_add_parity(out, wiegand, sizeof(wiegand) );
}
// static void calc35(uint16_t fc, uint32_t cardno, uint8_t *out){
// *lo = ((cardno & 0xFFFFF) << 1) | fc << 21;
// *hi = (1 << 5) | ((fc >> 11) & 1);
// }
static void calc37S(uint16_t fc, uint32_t cardno, uint8_t *out){
// FC 2 - 17 - 16 bit
// cardno 18 - 36 - 19 bit
// Even P1 1 - 19
// Odd P37 19 - 36
uint8_t wiegand[35];
num_to_bytebits(fc, 16, wiegand);
num_to_bytebits(cardno, 19, wiegand + 16);
wiegand_add_parity(out, wiegand, sizeof(wiegand) );
}
static void calc37H(uint64_t cardno, uint8_t *out){
// SC NONE
// cardno 1-35 34 bits
// Even Parity 0th bit 1-18
// Odd Parity 36th bit 19-35
uint8_t wiegand[37];
num_to_bytebits( (uint32_t)(cardno >> 32), 2, wiegand);
num_to_bytebits( (uint32_t)(cardno >> 0), 32, wiegand + 2);
wiegand_add_parity(out, wiegand, sizeof(wiegand) );
printf("%x %x\n", (uint32_t)(cardno >> 32), (uint32_t)cardno );
}
// static void calc40(uint64_t cardno, uint8_t *out){
// cardno = (cardno & 0xFFFFFFFFFF);
// *lo = ((cardno & 0xFFFFFFFF) << 1 );
// *hi = (cardno >> 31);
// }
void calcWiegand(uint8_t fmtlen, uint16_t fc, uint64_t cardno, uint8_t *bits){
uint32_t cn32 = (cardno & 0xFFFFFFFF);
switch ( fmtlen ) {
case 26: calc26(fc, cn32, bits); break;
// case 33 : calc33(fc, cn32, bits); break;
case 34: calc34(fc, cn32, bits); break;
// case 35 : calc35(fc, cn32, bits); break;
case 37: calc37S(fc, cn32, bits); break;
case 38: calc37H(cardno, bits); break;
// case 40 : calc40(cardno, bits); break;
// case 44 : { break; }
// case 84 : { break; }
default: break;
}
}
int CmdHIDWiegand(const char *Cmd) {
uint32_t oem = 0, fc = 0;
uint64_t cardnum = 0;
uint64_t blocks = 0, wiegand = 0;
uint8_t bits[BITS];
uint8_t *bs = bits;
memset(bs, 0, sizeof(bits));
uint8_t ctmp = param_getchar(Cmd, 0);
if ( strlen(Cmd) == 0 || strlen(Cmd) < 3 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_hid_wiegand();
oem = param_get8(Cmd, 0);
fc = param_get32ex(Cmd, 1, 0, 10);
cardnum = param_get64ex(Cmd, 2, 0, 10);
uint8_t fmtlen[] = {26,33,34,35,37,38,40};
PrintAndLog("HID | OEM | FC | CN | Wiegand | HID Formatted");
PrintAndLog("----+-----+------+---------+-----------+--------------------");
for (uint8_t i = 0; i < sizeof(fmtlen); i++){
memset(bits, 0x00, sizeof(bits));
calcWiegand( fmtlen[i], fc, cardnum, bs);
printf("ice:: %s \n", sprint_bin(bs, fmtlen[i]));
wiegand = (uint64_t)bytebits_to_byte(bs, 32) << 32 | bytebits_to_byte(bs+32, 32);
addHIDMarker(fmtlen[i], bs);
printf("ice:: %s\n", sprint_bin(bs, BITS));
blocks = (uint64_t)bytebits_to_byte(bs+32, 32) << 32 | bytebits_to_byte(bs+64, 32);
uint8_t shifts = 64-fmtlen[i];
wiegand >>= shifts;
PrintAndLog(" %u | %03u | %03u | %" PRIu64 " | %" PRIX64 " | %" PRIX64 ,
fmtlen[i],
oem,
fc,
cardnum,
wiegand,
blocks
);
}
PrintAndLog("----+-----+-----+-------+-----------+--------------------");
return 0;
}
int CmdHIDBrute(const char *Cmd){
bool errors = false;
uint32_t fc = 0, cn = 0, delay = 1000;
uint8_t fmtlen = 0;
uint8_t bits[96];
uint8_t *bs = bits;
memset(bs, 0, sizeof(bits));
uint8_t cmdp = 0;
while(param_getchar(Cmd, cmdp) != 0x00 && !errors) {
switch(param_getchar(Cmd, cmdp)) {
case 'h':
case 'H':
return usage_lf_hid_brute();
case 'f':
case 'F':
fc = param_get32ex(Cmd ,cmdp+1, 0, 10);
if ( !fc )
errors = true;
cmdp += 2;
break;
case 'd':
case 'D':
// delay between attemps, defaults to 1000ms.
delay = param_get32ex(Cmd, cmdp+1, 1000, 10);
cmdp += 2;
break;
case 'c':
case 'C':
cn = param_get32ex(Cmd, cmdp+1, 0, 10);
// truncate cardnumber.
cn &= 0xFFFF;
cmdp += 2;
break;
case 'a':
case 'A':
fmtlen = param_get8(Cmd, cmdp+1);
cmdp += 2;
bool is_ftm_ok = FALSE;
uint8_t ftms[] = {26,33,34,35,37};
for ( uint8_t i = 0; i < sizeof(ftms); i++){
if ( ftms[i] == fmtlen ) {
is_ftm_ok = TRUE;
}
}
// negated
errors = !is_ftm_ok;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
break;
}
}
if ( fc == 0 ) errors = true;
if ( errors ) return usage_lf_hid_brute();
PrintAndLog("Brute-forcing HID reader");
PrintAndLog("Press pm3-button to abort simulation or run another command");
uint16_t up = cn;
uint16_t down = cn;
for (;;){
if ( offline ) {
printf("Device offline\n");
return 2;
}
if (ukbhit()) {
PrintAndLog("aborted via keyboard!");
return sendPing();
}
// Do one up
if ( up < 0xFFFF )
if ( !sendTry(fmtlen, fc, up++, delay, bs)) return 1;
// Do one down (if cardnumber is given)
if ( cn > 1 )
if ( down > 1 )
if ( !sendTry(fmtlen, fc, --down, delay, bs)) return 1;
}
return 0;
}
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help"},
{"fskdemod",CmdHIDDemodFSK, 0, "Realtime HID FSK demodulator"},
{"sim", CmdHIDSim, 0, "HID tag simulator"},
{"clone", CmdHIDClone, 0, "Clone HID to T55x7"},
{"wiegand", CmdHIDWiegand, 1, "Convert facility code/card number to Wiegand code"},
{"brute", CmdHIDBrute, 0, "Bruteforce card number against reader"},
{NULL, NULL, 0, NULL}
};
int CmdLFHID(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}