X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7838f4beba79370f94c7a3de2cf34278f5d481c8..4490a4769074e6b5a91f9da1bee2296ac2b42f5f:/client/cmdlfawid.c?ds=sidebyside

diff --git a/client/cmdlfawid.c b/client/cmdlfawid.c
index 5fdbf654..fefc6e0a 100644
--- a/client/cmdlfawid.c
+++ b/client/cmdlfawid.c
@@ -7,234 +7,402 @@
 // at your option, any later version. See the LICENSE.txt file for the text of
 // the license.
 //-----------------------------------------------------------------------------
-// Low frequency AWID26 commands
+// Low frequency AWID26/50 commands
 //-----------------------------------------------------------------------------
-
-#include <stdio.h>      // sscanf
-#include "proxmark3.h"  // Definitions, USB controls, etc
-#include "ui.h"         // PrintAndLog
-#include "cmdparser.h"  // CmdsParse, CmdsHelp
 #include "cmdlfawid.h"  // AWID function declarations
-#include "lfdemod.h"    // parityTest
-#include "cmdmain.h"
+ 
 static int CmdHelp(const char *Cmd);
 
-
 int usage_lf_awid_fskdemod(void) {
-  PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
-  PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
-  PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
-  PrintAndLog("");
-  PrintAndLog("Usage:  lf awid fskdemod ['1']");
-  PrintAndLog("  Options : ");
-  PrintAndLog("  1 : (optional) stop after reading a single card");
-  PrintAndLog("");
-  PrintAndLog("   sample : lf awid fskdemod");
-  PrintAndLog("          : lf awid fskdemod 1");
-  return 0;
+	PrintAndLog("Enables AWID compatible reader mode printing details of scanned AWID26 or AWID50 tags.");
+	PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
+	PrintAndLog("If the [1] option is provided, reader mode is exited after reading a single AWID card.");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf awid fskdemod [h] [1]");
+	PrintAndLog("Options:");
+	PrintAndLog("      h :  This help");	
+	PrintAndLog("      1 : (optional) stop after reading a single card");
+	PrintAndLog("");
+	PrintAndLog("Samples:");
+	PrintAndLog("       lf awid fskdemod");
+	PrintAndLog("       lf awid fskdemod 1");
+	return 0;
 }
 
 int usage_lf_awid_sim(void) {
-  PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
-  PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
-  PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
-  PrintAndLog("");
-  PrintAndLog("Usage:  lf awid sim <Facility-Code> <Card-Number>");
-  PrintAndLog("  Options : ");
-  PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
-  PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
-  PrintAndLog("");
-  PrintAndLog("   sample : lf awid sim 224 1337");
-  return 0;
+	PrintAndLog("Enables simulation of AWID card with specified facility-code and card number.");
+	PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf awid sim [h] <format> <facility-code> <card-number>");
+	PrintAndLog("Options:");
+	PrintAndLog("                h :  This help");	
+	PrintAndLog("         <format> :  format length 26|50");
+	PrintAndLog("  <facility-code> :  8|16bit value facility code");
+	PrintAndLog("    <card number> :  16|32-bit value card number");
+	PrintAndLog("");
+	PrintAndLog("Samples:");
+	PrintAndLog("       lf awid sim 26 224 1337");
+	PrintAndLog("       lf awid sim 50 2001 13371337");
+	return 0;
 }
 
 int usage_lf_awid_clone(void) {
-  PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
-  PrintAndLog("The T55x7 must be on the antenna when issuing this command.  T55x7 blocks are calculated and printed in the process.");
-  PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
-  PrintAndLog("");
-  PrintAndLog("Usage:  lf awid clone <Facility-Code> <Card-Number>");
-  PrintAndLog("  Options : ");
-  PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
-  PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
-  PrintAndLog("");
-  PrintAndLog("   sample : lf awid clone 224 1337");
-  return 0;
+	PrintAndLog("Enables cloning of AWID card with specified facility-code and card number onto T55x7.");
+	PrintAndLog("The T55x7 must be on the antenna when issuing this command.  T55x7 blocks are calculated and printed in the process.");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf awid clone [h] <format> <facility-code> <card-number> [Q5]");
+	PrintAndLog("Options:");
+	PrintAndLog("                h :  This help");	
+	PrintAndLog("         <format> :  format length 26|50");
+	PrintAndLog("  <facility-code> :  8|16bit value facility code");
+	PrintAndLog("    <card number> :  16|32-bit value card number");
+	PrintAndLog("               Q5 :  optional - clone to Q5 (T5555) instead of T55x7 chip");
+	PrintAndLog("");
+	PrintAndLog("Samples:");
+	PrintAndLog("       lf awid clone 26 224 1337");
+	PrintAndLog("       lf awid clone 50 2001 13371337");
+	return 0;
 }
 
-int CmdAWIDDemodFSK(const char *Cmd)
-{
-  int findone=0;
-  if(Cmd[0]=='1') findone=1;
-  if (Cmd[0]=='h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
-  UsbCommand c={CMD_AWID_DEMOD_FSK};
-  c.arg[0]=findone;
-  clearCommandBuffer();
-  SendCommand(&c);
-  return 0;   
+int usage_lf_awid_brute(void){
+	PrintAndLog("Enables bruteforce of AWID reader 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 awid brute [h] a <format> f <facility-code> c <cardnumber> d <delay>");
+	PrintAndLog("Options:");
+	PrintAndLog("       h                 :  This help");
+	PrintAndLog("       a <format>        :  format length 26|50");
+	PrintAndLog("       f <facility-code> :  8|16bit value 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 awid brute a 26 f 224");
+	PrintAndLog("       lf awid brute a 50 f 2001 d 2000");
+	PrintAndLog("       lf awid brute a 50 f 2001 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, size_t bs_len){
+
+	PrintAndLog("Trying FC: %u; CN: %u", fc, cn);		
+	if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
+		PrintAndLog("Error with tag bitstream generation.");
+		return FALSE;
+	}
+
+	uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
+	uint64_t arg2 = 50; 		 // clk RF/50 invert=0
+	UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, bs_len}};
+	memcpy(c.d.asBytes, bs, bs_len);
+	clearCommandBuffer();
+	SendCommand(&c);
+	msleep(delay);
+	sendPing();
+	return TRUE;
+}
+
+
+int CmdAWIDDemodFSK(const char *Cmd) {
+	int findone = 0;
+	if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
+	if (Cmd[0] == '1') findone = 1;
+
+	UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
+	clearCommandBuffer();
+	SendCommand(&c);
+	return 0;   
+}
+
+//refactored by marshmellow
+int getAWIDBits(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint8_t *bits) {
+
+	// the return bits, preamble 0000 0001 
+	bits[7] = 1;  
+	
+	uint8_t pre[66];
+	memset(pre, 0, sizeof(pre));
+
+	// add formatlength
+	num_to_bytebits(fmtlen, 8, pre);
+	
+	// add facilitycode, cardnumber and wiegand parity bits
+	if ( fmtlen == 26 ) {
+		uint8_t wiegand[24];
+		num_to_bytebits(fc, 8, wiegand);
+		num_to_bytebits(cn, 16, wiegand+8);
+		wiegand_add_parity(pre+8, wiegand,  sizeof(wiegand));
+	} else {
+		uint8_t wiegand[48];
+		num_to_bytebits(fc, 16, wiegand);
+		num_to_bytebits(cn, 32, wiegand+16);
+		wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
+	}
+	
+	// add AWID 4bit parity 
+	size_t bitLen = addParity(pre, bits+8, 66, 4, 1);
+
+	if (bitLen != 88) return 0;
+	return 1;
 }
 
-int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits)
-{
-  int i;
-  uint32_t fcode=(fc & 0x000000FF), cnum=(cn & 0x0000FFFF), uBits=0;
-  if (fcode != fc)
-    PrintAndLog("NOTE: Facility code truncated for AWID26 format (8-bit facility code)");
-  if (cnum!=cn)
-    PrintAndLog("NOTE: Card number was truncated for AWID26 format (16-bit card number)");
-
-  AWIDBits[0] = 0x01; // 6-bit Preamble with 2 parity bits
-  AWIDBits[1] = 0x1D; // First byte from card format (26-bit) plus parity bits
-  AWIDBits[2] = 0x80; // Set the next two bits as 0b10 to finish card format
-  uBits = (fcode<<4) + (cnum>>12);
-  if (!parityTest(uBits,12,0))
-    AWIDBits[2] |= (1<<5); // If not already even parity, set bit to make even
-  uBits = AWIDBits[2]>>5;
-  if (!parityTest(uBits, 3, 1))
-    AWIDBits[2] |= (1<<4);
-  uBits = fcode>>5; // first 3 bits of facility-code
-  AWIDBits[2] += (uBits<<1);
-  if (!parityTest(uBits, 3, 1))
-    AWIDBits[2]++; // Set parity bit to make odd parity
-  uBits = (fcode & 0x1C)>>2;
-  AWIDBits[3] = 0;
-  if (!parityTest(uBits,3,1))
-    AWIDBits[3] |= (1<<4);
-  AWIDBits[3] += (uBits<<5);
-  uBits = ((fcode & 0x3)<<1) + ((cnum & 0x8000)>>15); // Grab/shift 2 LSBs from facility code and add shifted MSB from cardnum
-  if (!parityTest(uBits,3,1))
-    AWIDBits[3]++; // Set LSB for parity
-  AWIDBits[3]+= (uBits<<1);
-  uBits = (cnum & 0x7000)>>12;
-  AWIDBits[4] = uBits<<5;
-  if (!parityTest(uBits,3,1))
-    AWIDBits[4] |= (1<<4);
-  uBits = (cnum & 0x0E00)>>9;
-  AWIDBits[4] += (uBits<<1);
-  if (!parityTest(uBits,3,1))
-    AWIDBits[4]++; // Set LSB for parity
-  uBits = (cnum & 0x1C0)>>6; // Next bits from card number
-  AWIDBits[5]=(uBits<<5);
-  if (!parityTest(uBits,3,1))
-    AWIDBits[5] |= (1<<4); // Set odd parity bit as needed
-  uBits = (cnum & 0x38)>>3;
-  AWIDBits[5]+= (uBits<<1);
-  if (!parityTest(uBits,3,1))
-    AWIDBits[5]++; // Set odd parity bit as needed
-  uBits = (cnum & 0x7); // Last three bits from card number!
-  AWIDBits[6] = (uBits<<5);
-  if (!parityTest(uBits,3,1))
-    AWIDBits[6] |= (1<<4);
-  uBits = (cnum & 0x0FFF);
-  if (!parityTest(uBits,12,1))
-    AWIDBits[6] |= (1<<3);
-  else
-    AWIDBits[6]++;
-  for (i = 7; i<12; i++)
-    AWIDBits[i]=0x11;
-  return 1;
+int CmdAWIDSim(const char *Cmd) {
+	uint32_t fc = 0, cn = 0;
+	uint8_t fmtlen = 0;
+	uint8_t bits[96];
+	uint8_t *bs = bits;
+	size_t size = sizeof(bits);
+	memset(bs, 0x00, size);
+
+	uint64_t arg1 = ( 10 << 8 ) + 8; // fcHigh = 10, fcLow = 8
+	uint64_t arg2 = 50; // clk RF/50 invert=0
+  
+	char cmdp = param_getchar(Cmd, 0);
+	if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_sim();
+	
+  	fmtlen = param_get8(Cmd, 0);
+	fc = param_get32ex(Cmd, 1, 0, 10);	
+	cn = param_get32ex(Cmd, 2, 0, 10);
+	if ( !fc || !cn) return usage_lf_awid_sim();
+	
+	switch(fmtlen) {
+		case 26:
+			if ((fc & 0xFF) != fc) {
+				fc &= 0xFF;
+				PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
+			}
+
+			if ((cn & 0xFFFF) != cn) {
+				cn &= 0xFFFF;
+				PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
+			}
+			break;
+		case 50:
+			if ((fc & 0xFFFF) != fc) {
+				fc &= 0xFFFF;
+				PrintAndLog("Facility-Code Truncated to 16-bits (AWID50): %u", fc);
+			}
+			break;
+		default: break;
+	}
+	
+	PrintAndLog("Emulating AWID %u -- FC: %u; CN: %u\n", fmtlen, fc, cn);
+	PrintAndLog("Press pm3-button to abort simulation or run another command");
+	
+	if (!getAWIDBits(fmtlen, fc, cn, bs)) {
+		PrintAndLog("Error with tag bitstream generation.");
+		return 1;
+	}
+	// AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
+	// arg1 --- fcHigh<<8 + fcLow
+	// arg2 --- Inversion and clk setting
+	// 96   --- Bitstream length: 96-bits == 12 bytes
+	UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};  
+	memcpy(c.d.asBytes, bs, size);
+	clearCommandBuffer();
+	SendCommand(&c);
+	return 0;
 }
 
-int CmdAWIDSim(const char *Cmd)
-{
-  uint32_t fcode = 0, cnum = 0, fc=0, cn=0, i=0;
-  uint8_t *BS, BitStream[12];
-  uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
-  uint64_t arg2 = 50; // clk RF/50 invert=0
-  BS = BitStream;
-  if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
-    return usage_lf_awid_sim();
-  }
-
-  fcode=(fc & 0x000000FF);
-  cnum=(cn & 0x0000FFFF);
-  if (fc!=fcode)
-    PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
-  if (cn!=cnum)
-    PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
-  PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
-  PrintAndLog("Press pm3-button to abort simulation or run another command");
-  // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
-  if (getAWIDBits(fc, cn, BS)) {
-      PrintAndLog("Running 'lf simfsk c 50 H 10 L 8 d %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'", 
-                                        BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],
-                                        BS[7],BS[8],BS[9],BS[10],BS[11]);
-    } else
-      PrintAndLog("Error with tag bitstream generation.");
-  UsbCommand c;
-  c.cmd = CMD_FSK_SIM_TAG;
-  c.arg[0] = arg1; // fcHigh<<8 + fcLow
-  c.arg[1] = arg2; // Inversion and clk setting
-  c.arg[2] = 96; // Bitstream length: 96-bits == 12 bytes
-  for (i=0; i < 96; i++)
-    c.d.asBytes[i] = (BS[i/8] & (1<<(7-(i%8))))?1:0;
-  clearCommandBuffer();
-    SendCommand(&c);
-  return 0;
+int CmdAWIDClone(const char *Cmd) {
+	uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
+	uint32_t fc = 0, cn = 0;
+	uint8_t fmtlen = 0;
+	uint8_t bits[96];
+	uint8_t *bs=bits;
+	memset(bs,0,sizeof(bits));
+	
+	char cmdp = param_getchar(Cmd, 0);
+	if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_clone();
+
+  	fmtlen = param_get8(Cmd, 0);
+	fc = param_get32ex(Cmd, 1, 0, 10);
+	cn = param_get32ex(Cmd, 2, 0, 10);
+
+	if ( !fc || !cn) return usage_lf_awid_clone();
+	
+	switch(fmtlen) {
+		case 50:
+			if ((fc & 0xFFFF) != fc) {
+				fc &= 0xFFFF;
+				PrintAndLog("Facility-Code Truncated to 16-bits (AWID50): %u", fc);
+			}
+			break;
+		default: 
+			fmtlen = 26;
+			if ((fc & 0xFF) != fc) {
+				fc &= 0xFF;
+				PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
+			}
+
+			if ((cn & 0xFFFF) != cn) {
+				cn &= 0xFFFF;
+				PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
+			}
+			break;
+	}
+	
+	if (param_getchar(Cmd, 4) == 'Q' || param_getchar(Cmd, 4) == 'q')
+		//t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
+		blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
+
+	if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
+		PrintAndLog("Error with tag bitstream generation.");
+		return 1;
+	}	
+
+	blocks[1] = bytebits_to_byte(bs,32);
+	blocks[2] = bytebits_to_byte(bs+32,32);
+	blocks[3] = bytebits_to_byte(bs+64,32);
+
+	PrintAndLog("Preparing to clone AWID %u to T55x7 with FC: %u, CN: %u", fmtlen, fc, cn);
+	PrintAndLog("Blk | Data ");
+	PrintAndLog("----+------------");
+	PrintAndLog(" 00 | 0x%08x", blocks[0]);
+	PrintAndLog(" 01 | 0x%08x", blocks[1]);
+	PrintAndLog(" 02 | 0x%08x", blocks[2]);
+	PrintAndLog(" 03 | 0x%08x", blocks[3]);	
+	
+	UsbCommand resp;
+	UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
+
+	for (uint8_t i=0; i<4; i++) {
+		c.arg[0] = blocks[i];
+		c.arg[1] = i;
+		clearCommandBuffer();
+		SendCommand(&c);
+		if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)){
+			PrintAndLog("Error occurred, device did not respond during write operation.");
+			return -1;
+		}
+	}
+	return 0;
 }
 
-int CmdAWIDClone(const char *Cmd)
-{
-clearCommandBuffer();
-  uint32_t fc=0,cn=0,blocks[4] = {0x00107060, 0, 0, 0x11111111}, i=0;
-  uint8_t BitStream[12];
-  uint8_t *BS=BitStream;
-	UsbCommand c, resp;
-
-  if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
-    return usage_lf_awid_clone();
-  }
-
-  if ((fc & 0xFF) != fc) {
-    fc &= 0xFF;
-    PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
-  }
-  if ((cn & 0xFFFF) != cn) {
-    cn &= 0xFFFF;
-    PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
-  }
-  if (getAWIDBits(fc,cn,BS)) {
-    PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u (Raw: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x)", 
-                  fc,cn, BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],BS[7],BS[8],BS[9],BS[10],BS[11]);
-    blocks[1] = (BS[0]<<24) + (BS[1]<<16) + (BS[2]<<8) + (BS[3]);
-    blocks[2] = (BS[4]<<24) + (BS[5]<<16) + (BS[6]<<8) + (BS[7]);
-    PrintAndLog("Block 0: 0x%08x", blocks[0]);
-    PrintAndLog("Block 1: 0x%08x", blocks[1]);
-    PrintAndLog("Block 2: 0x%08x", blocks[2]);
-    PrintAndLog("Block 3: 0x%08x", blocks[3]);
-    for (i=0; i<4; i++) {
-      c.cmd = CMD_T55XX_WRITE_BLOCK;
-      c.arg[0] = blocks[i];
-      c.arg[1] = i;
-      c.arg[2] = 0;
-      SendCommand(&c);
-			if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
-				PrintAndLog("Error occurred, device did not respond during write operation.");
-				return -1;
+int CmdAWIDBrute(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;
+	size_t size = sizeof(bits);
+	memset(bs, 0x00, size);
+	uint8_t cmdp = 0;
+	
+	while(param_getchar(Cmd, cmdp) != 0x00 && !errors) {
+		switch(param_getchar(Cmd, cmdp)) {
+		case 'h':
+		case 'H':
+			return usage_lf_awid_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;
+			break;
+		default:
+			PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+			errors = true;
+			break;
+		}
+	}
+	if ( fc == 0 )errors = true;
+	if ( errors ) return usage_lf_awid_brute();
+
+	// limit fc according to selected format
+	switch(fmtlen) {
+		case 50:
+			if ((fc & 0xFFFF) != fc) {
+				fc &= 0xFFFF;
+				PrintAndLog("Facility-code truncated to 16-bits (AWID50): %u", fc);
+			}
+			break;
+		default:
+			if ((fc & 0xFF) != fc) {
+				fc &= 0xFF;
+				PrintAndLog("Facility-code truncated to 8-bits (AWID26): %u", fc);
 			}
+			break;
+	}
+	
+	PrintAndLog("Bruteforceing AWID %d Reader", fmtlen);
+	PrintAndLog("Press pm3-button to abort simulation or press key");
 
-    }
-  }
-  return 0;
+	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, size)) return 1;
+		
+		// Do one down  (if cardnumber is given)
+		if ( cn > 1 )
+			if ( down > 1 )
+				if ( !sendTry(fmtlen, fc, --down, delay, bs, size)) return 1;
+	}
+	return 0;
 }
 
-static command_t CommandTable[] = 
-{
-  {"help",      CmdHelp,        1, "This help"},
-  {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},
-  {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
-  {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
-  {NULL, NULL, 0, NULL}
+static command_t CommandTable[] = {
+	{"help",      CmdHelp,         1, "This help"},
+	{"fskdemod",  CmdAWIDDemodFSK, 0, "Realtime AWID FSK demodulator"},
+	{"sim",       CmdAWIDSim,      0, "AWID tag simulator"},
+	{"clone",     CmdAWIDClone,    0, "Clone AWID to T55x7"},
+	{"brute",	  CmdAWIDBrute,	   0, "Bruteforce card number against reader"},
+	{NULL, NULL, 0, NULL}
 };
 
-int CmdLFAWID(const char *Cmd)
-{
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+int CmdLFAWID(const char *Cmd) {
+	clearCommandBuffer();
+	CmdsParse(CommandTable, Cmd);
+	return 0;
 }
 
-int CmdHelp(const char *Cmd)
-{
-  CmdsHelp(CommandTable);
-  return 0;
+int CmdHelp(const char *Cmd) {
+	CmdsHelp(CommandTable);
+	return 0;
 }