proxmark3/client/cmdlfhid.c

//-----------------------------------------------------------------------------
// 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"

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("Different formatlength is supported");
	PrintAndLog("This is a incremental attack against reader.");
	PrintAndLog("");
	PrintAndLog("Usage:  lf hid brute [h] <format length> <facility code>");
	PrintAndLog("Options :");
	PrintAndLog("  h				- This help");	
	PrintAndLog("  <format length>	- 26|33|34|35|37|40|44|84");
	PrintAndLog("  <facility code>	- 8-bit value HID facility code");
	PrintAndLog("");
	PrintAndLog("Sample  : lf hid brute 26 224");
	return 0;
}

int CmdHIDDemodFSK(const char *Cmd) {
	int 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) {
	
	unsigned int 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) {
	
// }
//static void getParity26(uint32_t *hi, uint32_t *lo){
	// uint32_t result = 0;
	// int i;
	// // even parity
	// for (i = 24;i >= 13;i--)
		// result ^= (*lo >> i) & 1;
	// // even parity 26th bit
	// *lo |= result << 25;

	// // odd parity 
	// result = 0;
	// for (i = 12;i >= 1;i--)
		// result ^= (*lo >> i) & 1;
	// *lo |= !result;
//}

// static void getParity33(uint32_t *hi, uint32_t *lo){

// }
// 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 getParity35(uint32_t *hi, uint32_t *lo){	
// }
// static void getParity37S(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;

	// // odd parity
	// result = 0;
	// for (i = 19; 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, uint32_t *hi, uint32_t *lo){
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) );
	
//   *out |= (1 << 26); // why this?
//   *out |= (1 << 37);  // bit format for hid?
}
// static void calc33(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){

// }
// static void calc34(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
  // // put card number first bit 1 .. 20 //
  // *lo = ((cardno & 0X000F7FFF) << 1) | ((fc & 0XFFFF) << 17);
  // // set bit format for less than 37 bit format
  // *hi = (1 << 5) | (fc >> 15);
// }
// static void calc35(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
	// *lo = ((cardno & 0xFFFFF) << 1) | fc << 21; 
	// *hi = (1 << 5) | ((fc >> 11) & 1);  
// }
// static void calc37S(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
	// // FC 2 - 17   - 16 bit  
	// // cardno 18 - 36  - 19 bit
	// // Even P1   1 - 19
	// // Odd  P37  19 - 36

	// fc = fc & 0xFFFF;
	// *lo = ((fc << 20) | (cardno & 0x7FFFF) << 1);
	// *hi = (fc >> 12);
// }
// static void calc37H(uint64_t cardno, uint32_t *hi, uint32_t *lo){
	// // SC NONE
	// // cardno 1-35 34 bits 
	// // Even Parity  0th bit  1-18
	// // Odd  Parity 36th bit 19-35
	// cardno = (cardno & 0x00000003FFFFFFFF);
	// *lo = (cardno << 1);
	// *hi = (cardno >> 31);
// }
// static void calc40(uint64_t cardno, uint32_t *hi, uint32_t *lo){
	// cardno = (cardno & 0xFFFFFFFFFF);
	// *lo = ((cardno & 0xFFFFFFFF) << 1 ); 
	// *hi = (cardno >> 31);  
// }

static void calcWiegand(uint8_t fmtlen, uint16_t fc, uint64_t cardno, uint8_t *bits){

	// uint32_t hi = 0, lo = 0;
	// uint32_t cn32 = (cardno & 0xFFFFFFFF);
	// switch ( fmtlen ) {
		// case 26 : {			
			// calc26(fc, cn32, bits);
			// addHIDFormatMarker(fmtlen, bits);	
			// break;
		// }
		// case 33 : { 
 			// // calc33(fc, cn32, hi, lo);
			// // getParity33(hi, lo);	
			// break;
		// }
		// case 34 : {
 			// calc34(fc, cn32, hi, lo);
			// getParity34(hi, lo);		
			// break;
		// }
		// case 35 : {
			// calc35(fc, cn32, hi, lo);
			// getParity35(hi, lo);
			// break;
		// }
		// case 37 : {
			// calc37S(fc, cn32, hi, lo);
			// getParity37S(hi, lo);
			// break;
		// }
		// case 38 : { 
			// calc37H(cn32, hi, lo);
			// getParity37H(hi, lo);
			// break;
		// }
		// case 40 : calc40(cardno, hi, lo);	break;
		// case 44 : { break; }
		// case 84 : { break; }
	// }

}	

int CmdHIDWiegand(const char *Cmd) {
	uint32_t oem = 0, fc = 0;
	uint64_t cardnum = 0;
	
	uint32_t blocks[2] = {0,0};
	uint32_t wiegand[2] = {0,0}; 

	uint8_t bits[96];
	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 ftmlen[] = {26,33,34,35,37,38,40};
	
	PrintAndLog("HID | OEM |  FC |   CN  |  Wiegand  |  HID Formatted");
	PrintAndLog("----+-----+-----+-------+-----------+--------------------");
	for (uint8_t i = 0; i < sizeof(ftmlen); i++){
		calcWiegand( ftmlen[i], fc, cardnum, bs);
		blocks[0] = bytebits_to_byte(bs,32);
		blocks[1] = bytebits_to_byte(bs+32,32);
		PrintAndLog(" %d | %d  | %d  | %llu  | %08X%08X  |  %08X%08X ",
			ftmlen,
			oem,
			fc,
			cardnum,
			wiegand[0],
			wiegand[1],
			blocks[0],
			blocks[1]
			);
	}
	PrintAndLog("----+-----+-----+-------+-----------+--------------------");
	return 0;
}

int CmdHIDBrute(const char *Cmd){
	
	bool error = TRUE;
	uint8_t fc = 0, fmtlen = 0;

	uint8_t bits[96];
	uint8_t *bs = bits;
	memset(bs, 0, sizeof(bits));

	UsbCommand c = {CMD_HID_SIM_TAG, {0, 0, 0}};  
	
	char cmdp = param_getchar(Cmd, 0);
	if (strlen(Cmd) > 2 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_hid_brute();

	fmtlen = param_get8(Cmd, 0);
	uint8_t ftms[] = {26,33,34,35,37};
	for ( uint8_t i = 0; i < sizeof(ftms); i++){
		if ( ftms[i] == fmtlen ) {
			error = FALSE;
		}
	}

	if ( error ) return usage_lf_hid_brute();
	
  	fc =  param_get8(Cmd, 1);
	if ( fc == 0) return usage_lf_hid_brute();
	
	PrintAndLog("Brute-forcing HID reader");
	PrintAndLog("Press pm3-button to abort simulation or run another command");

	for ( uint16_t cn = 1; cn < 0xFFFF; ++cn){
		if (ukbhit()) {
			PrintAndLog("aborted via keyboard!");
			c.cmd = CMD_PING;
			c.arg[0] = 0x00;
			c.arg[1] = 0x00;
			c.arg[2] = 0x00;
			clearCommandBuffer();
			SendCommand(&c);
			return 1;
		}

		calcWiegand( fmtlen, fc, cn, bs);

		c.arg[0] = bytebits_to_byte(bs,32);
		c.arg[1] = bytebits_to_byte(bs+32,32);
		clearCommandBuffer();
		SendCommand(&c);
		
		PrintAndLog("Trying FC: %u; CN: %u", fc, cn);
		// pause
		sleep(1);
	}
	return 0;
}

static command_t CommandTable[] = {
	{"help",    CmdHelp,        1, "This help"},
	{"fskdemod",CmdHIDDemodFSK, 0, "[1] Realtime HID FSK demodulator (option '1' for one tag only)"},
	{"sim",     CmdHIDSim,      0, "<ID> -- HID tag simulator"},
	{"clone",   CmdHIDClone,    0, "<ID> [L] -- Clone HID to T55x7"},
	{"wiegand", CmdHIDWiegand,  0, "<OEM> <facility code> <card number> -- convert facility code/card number to Wiegand code"},
	{"brute",   CmdHIDBrute, 0, "<format length> <facility code> -- brute force card number"},
	{NULL, NULL, 0, NULL}
};

int CmdLFHID(const char *Cmd) {
	clearCommandBuffer();
	CmdsParse(CommandTable, Cmd);
	return 0;
}

int CmdHelp(const char *Cmd) {
	CmdsHelp(CommandTable);
	return 0;
}