[proxmark3-svn] / client / cmdlfem4x.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 EM4x commands
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "proxmark3.h"
#include "ui.h"
#include "graph.h"
#include "cmdmain.h"
#include "cmdparser.h"
#include "cmddata.h"
#include "cmdlf.h"
#include "cmdlfem4x.h"
#include "util.h"
#include "data.h"
#define LF_TRACE_BUFF_SIZE 12000
#define LF_BITSSTREAM_LEN 1000

char *global_em410xId;

static int CmdHelp(const char *Cmd);

/* Read the ID of an EM410x tag.
 * Format:
 *   1111 1111 1           <-- standard non-repeatable header
 *   XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
 *   ....
 *   CCCC                  <-- each bit here is parity for the 10 bits above in corresponding column
 *   0                     <-- stop bit, end of tag
 */
int CmdEM410xRead(const char *Cmd)
{
  int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low;
  int parity[4];
  char id[11];
  char id2[11];
  int retested = 0;
  uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
  high = low = 0;

  /* Detect high and lows and clock */
  for (i = 0; i < GraphTraceLen; i++)
  {
    if (GraphBuffer[i] > high)
      high = GraphBuffer[i];
    else if (GraphBuffer[i] < low)
      low = GraphBuffer[i];
  }

  /* get clock */
  clock = GetClock(Cmd, high, 0);

  /* parity for our 4 columns */
  parity[0] = parity[1] = parity[2] = parity[3] = 0;
  header = rows = 0;

  /* manchester demodulate */
  bit = bit2idx = 0;
  for (i = 0; i < (int)(GraphTraceLen / clock); i++)
  {
    hithigh = 0;
    hitlow = 0;
    first = 1;

    /* Find out if we hit both high and low peaks */
    for (j = 0; j < clock; j++)
    {
      if (GraphBuffer[(i * clock) + j] == high)
        hithigh = 1;
      else if (GraphBuffer[(i * clock) + j] == low)
        hitlow = 1;

      /* it doesn't count if it's the first part of our read
       because it's really just trailing from the last sequence */
      if (first && (hithigh || hitlow))
        hithigh = hitlow = 0;
      else
        first = 0;

      if (hithigh && hitlow)
        break;
    }

    /* If we didn't hit both high and low peaks, we had a bit transition */
    if (!hithigh || !hitlow)
      bit ^= 1;

    BitStream[bit2idx++] = bit;
  }

retest:
  /* We go till 5 before the graph ends because we'll get that far below */
  for (i = 1; i < bit2idx - 5; i++)
  {
    /* Step 2: We have our header but need our tag ID */
    if (header == 9 && rows < 10)
    {
      /* Confirm parity is correct */
      if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
      {
        /* Read another byte! */
        sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
        sprintf(id2+rows, "%x", (8 * BitStream[i+3]) + (4 * BitStream[i+2]) + (2 * BitStream[i+1]) + (1 * BitStream[i]));
        rows++;

        /* Keep parity info */
        parity[0] ^= BitStream[i];
        parity[1] ^= BitStream[i+1];
        parity[2] ^= BitStream[i+2];
        parity[3] ^= BitStream[i+3];

        /* Move 4 bits ahead */
        i += 4;
      }

      /* Damn, something wrong! reset */
      else
      {
        PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i);

        /* Start back rows * 5 + 9 header bits, -1 to not start at same place */
        i -= 9 + (5 * rows) - 5;

        rows = header = 0;
      }
    }

    /* Step 3: Got our 40 bits! confirm column parity */
    else if (rows == 10)
    {
      /* We need to make sure our 4 bits of parity are correct and we have a stop bit */
      if (BitStream[i] == parity[0] && BitStream[i+1] == parity[1] &&
        BitStream[i+2] == parity[2] && BitStream[i+3] == parity[3] &&
        BitStream[i+4] == 0)
      {
        /* Sweet! */
        PrintAndLog("EM410x Tag ID: %s", id);
        PrintAndLog("Unique Tag ID: %s", id2);

		global_em410xId = id;
		
        /* Stop any loops */
        return 1;
      }

      /* Crap! Incorrect parity or no stop bit, start all over */
      else
      {
        rows = header = 0;

        /* Go back 59 bits (9 header bits + 10 rows at 4+1 parity) */
        i -= 59;
      }
    }

    /* Step 1: get our header */
    else if (header < 9)
    {
      /* Need 9 consecutive 1's */
      if (BitStream[i] == 1)
        header++;

      /* We don't have a header, not enough consecutive 1 bits */
      else
        header = 0;
    }
  }

  /* if we've already retested after flipping bits, return */
  if (retested++){
    return 0;
	}

  /* if this didn't work, try flipping bits */
  for (i = 0; i < bit2idx; i++)
    BitStream[i] ^= 1;

  goto retest;
}

/* emulate an EM410X tag
 * Format:
 *   1111 1111 1           <-- standard non-repeatable header
 *   XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
 *   ....
 *   CCCC                  <-- each bit here is parity for the 10 bits above in corresponding column
 *   0                     <-- stop bit, end of tag
 */
int CmdEM410xSim(const char *Cmd)
{	
	int i, n, j, h, binary[4], parity[4];

	char cmdp = param_getchar(Cmd, 0);
	uint8_t uid[5] = {0x00};

	if (cmdp == 'h' || cmdp == 'H') {
		PrintAndLog("Usage:  lf em4x sim <UID>");
		PrintAndLog("");
		PrintAndLog("     sample: lf em4x sim 0F0368568B");
		return 0;
	}

	if (param_gethex(Cmd, 0, uid, 10)) {
		PrintAndLog("UID must include 10 HEX symbols");
		return 0;
	}
	
	PrintAndLog("Starting simulating with UID %02X %02X %02X %02X %02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
	
  
  /* clock is 64 in EM410x tags */
  int clock = 64;

  /* clear our graph */
  ClearGraph(0);

  /* write it out a few times */
  for (h = 0; h < 4; h++)
  {
    /* write 9 start bits */
    for (i = 0; i < 9; i++)
      AppendGraph(0, clock, 1);

    /* for each hex char */
    parity[0] = parity[1] = parity[2] = parity[3] = 0;
    for (i = 0; i < 10; i++)
    {
      /* read each hex char */
      sscanf(&Cmd[i], "%1x", &n);
      for (j = 3; j >= 0; j--, n/= 2)
        binary[j] = n % 2;

      /* append each bit */
      AppendGraph(0, clock, binary[0]);
      AppendGraph(0, clock, binary[1]);
      AppendGraph(0, clock, binary[2]);
      AppendGraph(0, clock, binary[3]);

      /* append parity bit */
      AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);

      /* keep track of column parity */
      parity[0] ^= binary[0];
      parity[1] ^= binary[1];
      parity[2] ^= binary[2];
      parity[3] ^= binary[3];
    }

    /* parity columns */
    AppendGraph(0, clock, parity[0]);
    AppendGraph(0, clock, parity[1]);
    AppendGraph(0, clock, parity[2]);
    AppendGraph(0, clock, parity[3]);

    /* stop bit */
    AppendGraph(0, clock, 0);
  }

  /* modulate that biatch */
  CmdManchesterMod("");

  /* booyah! */
  RepaintGraphWindow();
  
  CmdLFSim("");
  return 0;
}

/* Function is equivalent of lf read + data samples + em410xread
 * looped until an EM410x tag is detected 
 * 
 * Why is CmdSamples("16000")?
 *  TBD: Auto-grow sample size based on detected sample rate.  IE: If the
 *       rate gets lower, then grow the number of samples
 *  Changed by martin, 4000 x 4 = 16000, 
 *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235

*/
int CmdEM410xWatch(const char *Cmd)
{
	int read_h = (*Cmd == 'h');
	do
	{
		if (ukbhit()) {
			printf("\naborted via keyboard!\n");
			break;
		}
		
		CmdLFRead(read_h ? "h" : "");
		CmdSamples("16000");
		
	} while (
		!CmdEM410xRead("64") 
	);
	return 0;
}

int CmdEM410xWatchnSpoof(const char *Cmd)
{
	CmdEM410xWatch(Cmd);
    PrintAndLog("# Replaying : %s",global_em410xId);
    CmdEM410xSim(global_em410xId);
  return 0;
}

/* Read the transmitted data of an EM4x50 tag
 * Format:
 *
 *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 *  CCCCCCCC                         <- column parity bits
 *  0                                <- stop bit
 *  LW                               <- Listen Window
 *
 * This pattern repeats for every block of data being transmitted.
 * Transmission starts with two Listen Windows (LW - a modulated
 * pattern of 320 cycles each (32/32/128/64/64)).
 *
 * Note that this data may or may not be the UID. It is whatever data
 * is stored in the blocks defined in the control word First and Last
 * Word Read values. UID is stored in block 32.
 */
int CmdEM4x50Read(const char *Cmd)
{
  int i, j, startblock, skip, block, start, end, low, high;
  bool complete= false;
  int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
  char tmp[6];

  high= low= 0;
  memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);

  /* first get high and low values */
  for (i = 0; i < GraphTraceLen; i++)
  {
    if (GraphBuffer[i] > high)
      high = GraphBuffer[i];
    else if (GraphBuffer[i] < low)
      low = GraphBuffer[i];
  }

  /* populate a buffer with pulse lengths */
  i= 0;
  j= 0;
  while (i < GraphTraceLen)
  {
    // measure from low to low
    while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
      ++i;
    start= i;
    while ((GraphBuffer[i] < high) && (i<GraphTraceLen))
      ++i;
    while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
      ++i;
    if (j>(MAX_GRAPH_TRACE_LEN/64)) {
      break;
    }
    tmpbuff[j++]= i - start;
  }

  /* look for data start - should be 2 pairs of LW (pulses of 192,128) */
  start= -1;
  skip= 0;
  for (i= 0; i < j - 4 ; ++i)
  {
    skip += tmpbuff[i];
    if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
      if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
        if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
          if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
          {
            start= i + 3;
            break;
          }
  }
  startblock= i + 3;

  /* skip over the remainder of the LW */
  skip += tmpbuff[i+1]+tmpbuff[i+2];
  while (skip < MAX_GRAPH_TRACE_LEN && GraphBuffer[skip] > low)
    ++skip;
  skip += 8;

  /* now do it again to find the end */
  end= start;
  for (i += 3; i < j - 4 ; ++i)
  {
    end += tmpbuff[i];
    if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
      if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
        if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
          if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
          {
            complete= true;
            break;
          }
  }

  if (start >= 0)
    PrintAndLog("Found data at sample: %i",skip);
  else
  {
    PrintAndLog("No data found!");
    PrintAndLog("Try again with more samples.");
    return 0;
  }

  if (!complete)
  {
    PrintAndLog("*** Warning!");
    PrintAndLog("Partial data - no end found!");
    PrintAndLog("Try again with more samples.");
  }

  /* get rid of leading crap */
  sprintf(tmp,"%i",skip);
  CmdLtrim(tmp);

  /* now work through remaining buffer printing out data blocks */
  block= 0;
  i= startblock;
  while (block < 6)
  {
    PrintAndLog("Block %i:", block);
    // mandemod routine needs to be split so we can call it for data
    // just print for now for debugging
    CmdManchesterDemod("i 64");
    skip= 0;
    /* look for LW before start of next block */
    for ( ; i < j - 4 ; ++i)
    {
      skip += tmpbuff[i];
      if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
        if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
          break;
    }
    while (GraphBuffer[skip] > low)
      ++skip;
    skip += 8;
    sprintf(tmp,"%i",skip);
    CmdLtrim(tmp);
    start += skip;
    block++;
  }
  return 0;
}

int CmdEM410xWrite(const char *Cmd)
{
  uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
  int card = 0xFF; // invalid card value
	unsigned int clock = 0; // invalid clock value

	sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);

	// Check ID
	if (id == 0xFFFFFFFFFFFFFFFF) {
		PrintAndLog("Error! ID is required.\n");
		return 0;
	}
	if (id >= 0x10000000000) {
		PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
		return 0;
	}

	// Check Card
	if (card == 0xFF) {
		PrintAndLog("Error! Card type required.\n");
		return 0;
	}
	if (card < 0) {
		PrintAndLog("Error! Bad card type selected.\n");
		return 0;
	}

	// Check Clock
	if (card == 1)
	{
		// Default: 64
		if (clock == 0)
			clock = 64;

		// Allowed clock rates: 16, 32 and 64
		if ((clock != 16) && (clock != 32) && (clock != 64)) {
			PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock);
			return 0;
		}
	}
	else if (clock != 0)
	{
		PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n");
		return 0;
	}

	if (card == 1) {
		PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
		// NOTE: We really should pass the clock in as a separate argument, but to
		//   provide for backwards-compatibility for older firmware, and to avoid
		//   having to add another argument to CMD_EM410X_WRITE_TAG, we just store
		//   the clock rate in bits 8-15 of the card value
		card = (card & 0xFF) | (((uint64_t)clock << 8) & 0xFF00);
	}
	else if (card == 0)
		PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
	else {
		PrintAndLog("Error! Bad card type selected.\n");
		return 0;
	}

  UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
  SendCommand(&c);

  return 0;
}

int CmdReadWord(const char *Cmd)
{
	int Word = -1; //default to invalid word
	UsbCommand c;
  
	sscanf(Cmd, "%d", &Word);
  
	if ( (Word > 15) | (Word < 0) ) {
		PrintAndLog("Word must be between 0 and 15");
		return 1;
	}
  
	PrintAndLog("Reading word %d", Word);
  
	c.cmd = CMD_EM4X_READ_WORD;
	c.d.asBytes[0] = 0x0; //Normal mode
	c.arg[0] = 0;
	c.arg[1] = Word;
	c.arg[2] = 0;
	SendCommand(&c);
	WaitForResponse(CMD_ACK, NULL);

	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};

	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
	WaitForResponseTimeout(CMD_ACK,NULL, 1500);

	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
		GraphBuffer[j] = ((int)data[j]);
	}
	GraphTraceLen = LF_TRACE_BUFF_SIZE;
	
	uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
	uint8_t * bitstream = bits;
	manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN);
	RepaintGraphWindow();
  return 0;
}

int CmdReadWordPWD(const char *Cmd)
{
	int Word = -1; //default to invalid word
	int Password = 0xFFFFFFFF; //default to blank password
	UsbCommand c;

	sscanf(Cmd, "%d %x", &Word, &Password);

	if ( (Word > 15) | (Word < 0) ) {
		PrintAndLog("Word must be between 0 and 15");
		return 1;
	}
  
	PrintAndLog("Reading word %d with password %08X", Word, Password);

	c.cmd = CMD_EM4X_READ_WORD;
	c.d.asBytes[0] = 0x1; //Password mode
	c.arg[0] = 0;
	c.arg[1] = Word;
	c.arg[2] = Password;
	SendCommand(&c);
	WaitForResponse(CMD_ACK, NULL);
		
	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};

	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
	WaitForResponseTimeout(CMD_ACK,NULL, 1500);

	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
		GraphBuffer[j] = ((int)data[j]);
	}
	GraphTraceLen = LF_TRACE_BUFF_SIZE;
	
	uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
	uint8_t * bitstream = bits;	
	manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN);
	RepaintGraphWindow();
  return 0;
}

int CmdWriteWord(const char *Cmd)
{
  int Word = 16; //default to invalid block
  int Data = 0xFFFFFFFF; //default to blank data
  UsbCommand c;
  
  sscanf(Cmd, "%x %d", &Data, &Word);
  
  if (Word > 15) {
    PrintAndLog("Word must be between 0 and 15");
    return 1;
  }
  
  PrintAndLog("Writting word %d with data %08X", Word, Data);
  
  c.cmd = CMD_EM4X_WRITE_WORD;
  c.d.asBytes[0] = 0x0; //Normal mode
  c.arg[0] = Data;
  c.arg[1] = Word;
  c.arg[2] = 0;
  SendCommand(&c);
  return 0;
}

int CmdWriteWordPWD(const char *Cmd)
{
  int Word = 8; //default to invalid word
  int Data = 0xFFFFFFFF; //default to blank data
  int Password = 0xFFFFFFFF; //default to blank password
  UsbCommand c;
  
  sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
  
  if (Word > 15) {
    PrintAndLog("Word must be between 0 and 15");
    return 1;
  }
  
  PrintAndLog("Writting word %d with data %08X and password %08X", Word, Data, Password);
  
  c.cmd = CMD_EM4X_WRITE_WORD;
  c.d.asBytes[0] = 0x1; //Password mode
  c.arg[0] = Data;
  c.arg[1] = Word;
  c.arg[2] = Password;
  SendCommand(&c);
  return 0;
}

static command_t CommandTable[] =
{
  {"help", CmdHelp, 1, "This help"},
  {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
  {"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
  {"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
  {"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
  {"410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
  {"4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
  {"rd", CmdReadWord, 1, "<Word 1-15> -- Read EM4xxx word data"},
  {"rdpwd", CmdReadWordPWD, 1, "<Word 1-15> <Password> -- Read EM4xxx word data  in password mode "},
  {"wr", CmdWriteWord, 1, "<Data> <Word 1-15> -- Write EM4xxx word data"},
  {"wrpwd", CmdWriteWordPWD, 1, "<Data> <Word 1-15> <Password> -- Write EM4xxx word data in password mode"},
  {NULL, NULL, 0, NULL}
};

int CmdLFEM4X(const char *Cmd)
{
  CmdsParse(CommandTable, Cmd);
  return 0;
}

int CmdHelp(const char *Cmd)
{
  CmdsHelp(CommandTable);
  return 0;
}
Commit	Line	Data
2ae8a312	1	//-----------------------------------------------------------------------------
a553f267	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// Low frequency EM4x commands
	9	//-----------------------------------------------------------------------------
	10
7fe9b0b7	11	#include <stdio.h>
9e13f875	12	#include <string.h>
ec564290	13	#include <inttypes.h>
902cb3c0	14	#include "proxmark3.h"
7fe9b0b7	15	#include "ui.h"
7fe9b0b7	16	#include "graph.h"
f38a1528	17	#include "cmdmain.h"
7fe9b0b7	18	#include "cmdparser.h"
	19	#include "cmddata.h"
	20	#include "cmdlf.h"
	21	#include "cmdlfem4x.h"
f38a1528	22	#include "util.h"
f38a1528	23	#include "data.h"
f6c18637	24	#define LF_TRACE_BUFF_SIZE 12000
c6be64da	25	#define LF_BITSSTREAM_LEN 1000
f38a1528	26
f38a1528	27	char *global_em410xId;
7fe9b0b7	28
	29	static int CmdHelp(const char *Cmd);
	30
	31	/* Read the ID of an EM410x tag.
	32	* Format:
	33	* 1111 1111 1 <-- standard non-repeatable header
	34	* XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
	35	* ....
	36	* CCCC <-- each bit here is parity for the 10 bits above in corresponding column
	37	* 0 <-- stop bit, end of tag
	38	*/
	39	int CmdEM410xRead(const char *Cmd)
	40	{
	41	int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low;
	42	int parity[4];
	43	char id[11];
080ff30a	44	char id2[11];
7fe9b0b7	45	int retested = 0;
15cdabd4	46	uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
7fe9b0b7	47	high = low = 0;
	48
	49	/* Detect high and lows and clock */
	50	for (i = 0; i < GraphTraceLen; i++)
	51	{
	52	if (GraphBuffer[i] > high)
	53	high = GraphBuffer[i];
	54	else if (GraphBuffer[i] < low)
	55	low = GraphBuffer[i];
	56	}
	57
	58	/* get clock */
	59	clock = GetClock(Cmd, high, 0);
	60
	61	/* parity for our 4 columns */
	62	parity[0] = parity[1] = parity[2] = parity[3] = 0;
	63	header = rows = 0;
	64
	65	/* manchester demodulate */
	66	bit = bit2idx = 0;
	67	for (i = 0; i < (int)(GraphTraceLen / clock); i++)
	68	{
	69	hithigh = 0;
	70	hitlow = 0;
	71	first = 1;
	72
	73	/* Find out if we hit both high and low peaks */
	74	for (j = 0; j < clock; j++)
	75	{
	76	if (GraphBuffer[(i * clock) + j] == high)
	77	hithigh = 1;
	78	else if (GraphBuffer[(i * clock) + j] == low)
	79	hitlow = 1;
	80
	81	/* it doesn't count if it's the first part of our read
	82	because it's really just trailing from the last sequence */
	83	if (first && (hithigh \|\| hitlow))
	84	hithigh = hitlow = 0;
	85	else
	86	first = 0;
	87
	88	if (hithigh && hitlow)
	89	break;
	90	}
	91
	92	/* If we didn't hit both high and low peaks, we had a bit transition */
	93	if (!hithigh \|\| !hitlow)
	94	bit ^= 1;
	95
	96	BitStream[bit2idx++] = bit;
	97	}
	98
	99	retest:
	100	/* We go till 5 before the graph ends because we'll get that far below */
	101	for (i = 1; i < bit2idx - 5; i++)
	102	{
	103	/* Step 2: We have our header but need our tag ID */
	104	if (header == 9 && rows < 10)
	105	{
	106	/* Confirm parity is correct */
	107	if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
	108	{
	109	/* Read another byte! */
	110	sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
cb967ea9	111	sprintf(id2+rows, "%x", (8 * BitStream[i+3]) + (4 * BitStream[i+2]) + (2 * BitStream[i+1]) + (1 * BitStream[i]));
7fe9b0b7	112	rows++;
	113
	114	/* Keep parity info */
	115	parity[0] ^= BitStream[i];
	116	parity[1] ^= BitStream[i+1];
	117	parity[2] ^= BitStream[i+2];
	118	parity[3] ^= BitStream[i+3];
	119
	120	/* Move 4 bits ahead */
	121	i += 4;
	122	}
	123
	124	/* Damn, something wrong! reset */
	125	else
	126	{
	127	PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i);
	128
	129	/* Start back rows * 5 + 9 header bits, -1 to not start at same place */
	130	i -= 9 + (5 * rows) - 5;
	131
	132	rows = header = 0;
	133	}
	134	}
	135
	136	/* Step 3: Got our 40 bits! confirm column parity */
	137	else if (rows == 10)
	138	{
	139	/* We need to make sure our 4 bits of parity are correct and we have a stop bit */
	140	if (BitStream[i] == parity[0] && BitStream[i+1] == parity[1] &&
	141	BitStream[i+2] == parity[2] && BitStream[i+3] == parity[3] &&
	142	BitStream[i+4] == 0)
	143	{
	144	/* Sweet! */
	145	PrintAndLog("EM410x Tag ID: %s", id);
cb967ea9	146	PrintAndLog("Unique Tag ID: %s", id2);
7fe9b0b7	147
f38a1528	148	global_em410xId = id;
f38a1528	149
7fe9b0b7	150	/* Stop any loops */
	151	return 1;
	152	}
	153
	154	/* Crap! Incorrect parity or no stop bit, start all over */
	155	else
	156	{
	157	rows = header = 0;
	158
	159	/* Go back 59 bits (9 header bits + 10 rows at 4+1 parity) */
	160	i -= 59;
	161	}
	162	}
	163
	164	/* Step 1: get our header */
	165	else if (header < 9)
	166	{
	167	/* Need 9 consecutive 1's */
	168	if (BitStream[i] == 1)
	169	header++;
	170
	171	/* We don't have a header, not enough consecutive 1 bits */
	172	else
	173	header = 0;
	174	}
	175	}
	176
	177	/* if we've already retested after flipping bits, return */
f38a1528	178	if (retested++){
7fe9b0b7	179	return 0;
f38a1528	180	}
7fe9b0b7	181
	182	/* if this didn't work, try flipping bits */
	183	for (i = 0; i < bit2idx; i++)
	184	BitStream[i] ^= 1;
	185
	186	goto retest;
	187	}
	188
	189	/* emulate an EM410X tag
	190	* Format:
	191	* 1111 1111 1 <-- standard non-repeatable header
	192	* XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
	193	* ....
	194	* CCCC <-- each bit here is parity for the 10 bits above in corresponding column
	195	* 0 <-- stop bit, end of tag
	196	*/
	197	int CmdEM410xSim(const char *Cmd)
2ae8a312	198	{
	199	int i, n, j, h, binary[4], parity[4];
	200
	201	char cmdp = param_getchar(Cmd, 0);
	202	uint8_t uid[5] = {0x00};
	203
	204	if (cmdp == 'h' \|\| cmdp == 'H') {
	205	PrintAndLog("Usage: lf em4x sim <UID>");
	206	PrintAndLog("");
	207	PrintAndLog(" sample: lf em4x sim 0F0368568B");
	208	return 0;
	209	}
7fe9b0b7	210
2ae8a312	211	if (param_gethex(Cmd, 0, uid, 10)) {
	212	PrintAndLog("UID must include 10 HEX symbols");
	213	return 0;
	214	}
	215
	216	PrintAndLog("Starting simulating with UID %02X %02X %02X %02X %02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
	217
	218
7fe9b0b7	219	/* clock is 64 in EM410x tags */
	220	int clock = 64;
	221
	222	/* clear our graph */
	223	ClearGraph(0);
	224
	225	/* write it out a few times */
	226	for (h = 0; h < 4; h++)
	227	{
	228	/* write 9 start bits */
	229	for (i = 0; i < 9; i++)
	230	AppendGraph(0, clock, 1);
	231
	232	/* for each hex char */
	233	parity[0] = parity[1] = parity[2] = parity[3] = 0;
	234	for (i = 0; i < 10; i++)
	235	{
	236	/* read each hex char */
	237	sscanf(&Cmd[i], "%1x", &n);
	238	for (j = 3; j >= 0; j--, n/= 2)
	239	binary[j] = n % 2;
	240
	241	/* append each bit */
	242	AppendGraph(0, clock, binary[0]);
	243	AppendGraph(0, clock, binary[1]);
	244	AppendGraph(0, clock, binary[2]);
	245	AppendGraph(0, clock, binary[3]);
	246
	247	/* append parity bit */
	248	AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
	249
	250	/* keep track of column parity */
	251	parity[0] ^= binary[0];
	252	parity[1] ^= binary[1];
	253	parity[2] ^= binary[2];
	254	parity[3] ^= binary[3];
	255	}
	256
	257	/* parity columns */
	258	AppendGraph(0, clock, parity[0]);
	259	AppendGraph(0, clock, parity[1]);
	260	AppendGraph(0, clock, parity[2]);
	261	AppendGraph(0, clock, parity[3]);
	262
	263	/* stop bit */
	264	AppendGraph(0, clock, 0);
	265	}
	266
	267	/* modulate that biatch */
	268	CmdManchesterMod("");
	269
	270	/* booyah! */
	271	RepaintGraphWindow();
	272
	273	CmdLFSim("");
	274	return 0;
	275	}
	276
c2d25819	277	/* Function is equivalent of lf read + data samples + em410xread
	278	* looped until an EM410x tag is detected
	279	*
	280	* Why is CmdSamples("16000")?
	281	* TBD: Auto-grow sample size based on detected sample rate. IE: If the
	282	* rate gets lower, then grow the number of samples
	283	* Changed by martin, 4000 x 4 = 16000,
	284	* see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
	285
	286	*/
7fe9b0b7	287	int CmdEM410xWatch(const char *Cmd)
7fe9b0b7	288	{
c2d25819	289	int read_h = (*Cmd == 'h');
	290	do
	291	{
2ae8a312	292	if (ukbhit()) {
	293	printf("\naborted via keyboard!\n");
	294	break;
	295	}
	296
c2d25819	297	CmdLFRead(read_h ? "h" : "");
2ae8a312	298	CmdSamples("16000");
2ae8a312	299
c2d25819	300	} while (
2ae8a312	301	!CmdEM410xRead("64")
f38a1528	302	);
c2d25819	303	return 0;
f38a1528	304	}
	305
	306	int CmdEM410xWatchnSpoof(const char *Cmd)
	307	{
c2d25819	308	CmdEM410xWatch(Cmd);
f38a1528	309	PrintAndLog("# Replaying : %s",global_em410xId);
f38a1528	310	CmdEM410xSim(global_em410xId);
7fe9b0b7	311	return 0;
	312	}
	313
	314	/* Read the transmitted data of an EM4x50 tag
	315	* Format:
	316	*
	317	* XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
	318	* XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
	319	* XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
	320	* XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
	321	* CCCCCCCC <- column parity bits
	322	* 0 <- stop bit
	323	* LW <- Listen Window
	324	*
	325	* This pattern repeats for every block of data being transmitted.
	326	* Transmission starts with two Listen Windows (LW - a modulated
	327	* pattern of 320 cycles each (32/32/128/64/64)).
	328	*
	329	* Note that this data may or may not be the UID. It is whatever data
	330	* is stored in the blocks defined in the control word First and Last
	331	* Word Read values. UID is stored in block 32.
	332	*/
	333	int CmdEM4x50Read(const char *Cmd)
	334	{
31b6e9af	335	int i, j, startblock, skip, block, start, end, low, high;
7fe9b0b7	336	bool complete= false;
	337	int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
	338	char tmp[6];
	339
	340	high= low= 0;
913d23c6	341	memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
7fe9b0b7	342
	343	/* first get high and low values */
	344	for (i = 0; i < GraphTraceLen; i++)
	345	{
	346	if (GraphBuffer[i] > high)
	347	high = GraphBuffer[i];
	348	else if (GraphBuffer[i] < low)
	349	low = GraphBuffer[i];
	350	}
	351
	352	/* populate a buffer with pulse lengths */
	353	i= 0;
	354	j= 0;
	355	while (i < GraphTraceLen)
	356	{
	357	// measure from low to low
	358	while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
	359	++i;
	360	start= i;
	361	while ((GraphBuffer[i] < high) && (i<GraphTraceLen))
	362	++i;
	363	while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
	364	++i;
	365	if (j>(MAX_GRAPH_TRACE_LEN/64)) {
	366	break;
	367	}
	368	tmpbuff[j++]= i - start;
	369	}
	370
	371	/* look for data start - should be 2 pairs of LW (pulses of 192,128) */
	372	start= -1;
	373	skip= 0;
	374	for (i= 0; i < j - 4 ; ++i)
	375	{
	376	skip += tmpbuff[i];
	377	if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
	378	if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
	379	if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
	380	if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
	381	{
	382	start= i + 3;
	383	break;
	384	}
	385	}
	386	startblock= i + 3;
	387
	388	/* skip over the remainder of the LW */
	389	skip += tmpbuff[i+1]+tmpbuff[i+2];
	390	while (skip < MAX_GRAPH_TRACE_LEN && GraphBuffer[skip] > low)
	391	++skip;
	392	skip += 8;
	393
	394	/* now do it again to find the end */
	395	end= start;
	396	for (i += 3; i < j - 4 ; ++i)
	397	{
	398	end += tmpbuff[i];
	399	if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
	400	if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
	401	if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
	402	if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
	403	{
	404	complete= true;
	405	break;
406	}
407	}
408
409	if (start >= 0)
410	PrintAndLog("Found data at sample: %i",skip);
411	else
412	{
413	PrintAndLog("No data found!");
414	PrintAndLog("Try again with more samples.");
415	return 0;
416	}
417
418	if (!complete)
419	{
420	PrintAndLog("*** Warning!");
421	PrintAndLog("Partial data - no end found!");
422	PrintAndLog("Try again with more samples.");
423	}
424
425	/* get rid of leading crap */
426	sprintf(tmp,"%i",skip);
427	CmdLtrim(tmp);
428
429	/* now work through remaining buffer printing out data blocks */
430	block= 0;
431	i= startblock;
432	while (block < 6)
433	{
434	PrintAndLog("Block %i:", block);
435	// mandemod routine needs to be split so we can call it for data
436	// just print for now for debugging
437	CmdManchesterDemod("i 64");
438	skip= 0;
439	/* look for LW before start of next block */
440	for ( ; i < j - 4 ; ++i)
441	{
442	skip += tmpbuff[i];
443	if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
444	if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
445	break;
446	}
447	while (GraphBuffer[skip] > low)
448	++skip;
449	skip += 8;
450	sprintf(tmp,"%i",skip);
451	CmdLtrim(tmp);
452	start += skip;
453	block++;
454	}
455	return 0;
456	}
457
2d4eae76	458	int CmdEM410xWrite(const char *Cmd)
2d4eae76	459	{
e67b06b7	460	uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
7bb9d33e	461	int card = 0xFF; // invalid card value
e67b06b7	462	unsigned int clock = 0; // invalid clock value
	463
	464	sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
	465
	466	// Check ID
	467	if (id == 0xFFFFFFFFFFFFFFFF) {
	468	PrintAndLog("Error! ID is required.\n");
	469	return 0;
	470	}
	471	if (id >= 0x10000000000) {
	472	PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
	473	return 0;
	474	}
	475
	476	// Check Card
	477	if (card == 0xFF) {
	478	PrintAndLog("Error! Card type required.\n");
	479	return 0;
	480	}
	481	if (card < 0) {
	482	PrintAndLog("Error! Bad card type selected.\n");
	483	return 0;
	484	}
	485
	486	// Check Clock
	487	if (card == 1)
	488	{
	489	// Default: 64
	490	if (clock == 0)
	491	clock = 64;
	492
	493	// Allowed clock rates: 16, 32 and 64
	494	if ((clock != 16) && (clock != 32) && (clock != 64)) {
	495	PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock);
	496	return 0;
	497	}
	498	}
	499	else if (clock != 0)
	500	{
	501	PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n");
	502	return 0;
	503	}
	504
	505	if (card == 1) {
	506	PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
	507	// NOTE: We really should pass the clock in as a separate argument, but to
	508	// provide for backwards-compatibility for older firmware, and to avoid
	509	// having to add another argument to CMD_EM410X_WRITE_TAG, we just store
	510	// the clock rate in bits 8-15 of the card value
	511	card = (card & 0xFF) \| (((uint64_t)clock << 8) & 0xFF00);
	512	}
	513	else if (card == 0)
	514	PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
	515	else {
	516	PrintAndLog("Error! Bad card type selected.\n");
	517	return 0;
	518	}
2d4eae76	519
2d4eae76	520	UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
	521	SendCommand(&c);
	522
	523	return 0;
	524	}
	525
54a942b0	526	int CmdReadWord(const char *Cmd)
54a942b0	527	{
f38a1528	528	int Word = -1; //default to invalid word
b44e5233	529	UsbCommand c;
54a942b0	530
b44e5233	531	sscanf(Cmd, "%d", &Word);
54a942b0	532
f38a1528	533	if ( (Word > 15) \| (Word < 0) ) {
b44e5233	534	PrintAndLog("Word must be between 0 and 15");
	535	return 1;
	536	}
54a942b0	537
b44e5233	538	PrintAndLog("Reading word %d", Word);
54a942b0	539
b44e5233	540	c.cmd = CMD_EM4X_READ_WORD;
	541	c.d.asBytes[0] = 0x0; //Normal mode
	542	c.arg[0] = 0;
	543	c.arg[1] = Word;
	544	c.arg[2] = 0;
	545	SendCommand(&c);
f38a1528	546	WaitForResponse(CMD_ACK, NULL);
f38a1528	547
f6c18637	548	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
f38a1528	549
b44e5233	550	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset..
f38a1528	551	WaitForResponseTimeout(CMD_ACK,NULL, 1500);
f38a1528	552
b44e5233	553	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
f6c18637	554	GraphBuffer[j] = ((int)data[j]);
f38a1528	555	}
b44e5233	556	GraphTraceLen = LF_TRACE_BUFF_SIZE;
b44e5233	557
c6be64da	558	uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
b44e5233	559	uint8_t * bitstream = bits;
c6be64da	560	manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN);
f6c18637	561	RepaintGraphWindow();
54a942b0	562	return 0;
	563	}
	564
	565	int CmdReadWordPWD(const char *Cmd)
	566	{
f38a1528	567	int Word = -1; //default to invalid word
b44e5233	568	int Password = 0xFFFFFFFF; //default to blank password
	569	UsbCommand c;
	570
	571	sscanf(Cmd, "%d %x", &Word, &Password);
	572
f38a1528	573	if ( (Word > 15) \| (Word < 0) ) {
b44e5233	574	PrintAndLog("Word must be between 0 and 15");
	575	return 1;
	576	}
54a942b0	577
b44e5233	578	PrintAndLog("Reading word %d with password %08X", Word, Password);
	579
	580	c.cmd = CMD_EM4X_READ_WORD;
	581	c.d.asBytes[0] = 0x1; //Password mode
	582	c.arg[0] = 0;
	583	c.arg[1] = Word;
	584	c.arg[2] = Password;
	585	SendCommand(&c);
f38a1528	586	WaitForResponse(CMD_ACK, NULL);
b44e5233	587
f6c18637	588	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
f38a1528	589
b44e5233	590	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset..
f38a1528	591	WaitForResponseTimeout(CMD_ACK,NULL, 1500);
f38a1528	592
b44e5233	593	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
f6c18637	594	GraphBuffer[j] = ((int)data[j]);
f38a1528	595	}
b44e5233	596	GraphTraceLen = LF_TRACE_BUFF_SIZE;
b44e5233	597
c6be64da	598	uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
	599	uint8_t * bitstream = bits;
	600	manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN);
f6c18637	601	RepaintGraphWindow();
54a942b0	602	return 0;
	603	}
	604
	605	int CmdWriteWord(const char *Cmd)
	606	{
	607	int Word = 16; //default to invalid block
	608	int Data = 0xFFFFFFFF; //default to blank data
	609	UsbCommand c;
	610
	611	sscanf(Cmd, "%x %d", &Data, &Word);
	612
	613	if (Word > 15) {
	614	PrintAndLog("Word must be between 0 and 15");
	615	return 1;
	616	}
	617
	618	PrintAndLog("Writting word %d with data %08X", Word, Data);
	619
	620	c.cmd = CMD_EM4X_WRITE_WORD;
	621	c.d.asBytes[0] = 0x0; //Normal mode
	622	c.arg[0] = Data;
	623	c.arg[1] = Word;
	624	c.arg[2] = 0;
	625	SendCommand(&c);
	626	return 0;
	627	}
	628
	629	int CmdWriteWordPWD(const char *Cmd)
	630	{
	631	int Word = 8; //default to invalid word
	632	int Data = 0xFFFFFFFF; //default to blank data
	633	int Password = 0xFFFFFFFF; //default to blank password
	634	UsbCommand c;
	635
	636	sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
	637
	638	if (Word > 15) {
	639	PrintAndLog("Word must be between 0 and 15");
	640	return 1;
	641	}
	642
	643	PrintAndLog("Writting word %d with data %08X and password %08X", Word, Data, Password);
	644
	645	c.cmd = CMD_EM4X_WRITE_WORD;
	646	c.d.asBytes[0] = 0x1; //Password mode
	647	c.arg[0] = Data;
	648	c.arg[1] = Word;
	649	c.arg[2] = Password;
	650	SendCommand(&c);
	651	return 0;
	652	}
	653
2d4eae76	654	static command_t CommandTable[] =
7fe9b0b7	655	{
54a942b0	656	{"help", CmdHelp, 1, "This help"},
c2d25819	657	{"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
	658	{"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
	659	{"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
	660	{"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
	661	{"410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
	662	{"4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
f38a1528	663	{"rd", CmdReadWord, 1, "<Word 1-15> -- Read EM4xxx word data"},
	664	{"rdpwd", CmdReadWordPWD, 1, "<Word 1-15> <Password> -- Read EM4xxx word data in password mode "},
	665	{"wr", CmdWriteWord, 1, "<Data> <Word 1-15> -- Write EM4xxx word data"},
	666	{"wrpwd", CmdWriteWordPWD, 1, "<Data> <Word 1-15> <Password> -- Write EM4xxx word data in password mode"},
7fe9b0b7	667	{NULL, NULL, 0, NULL}
	668	};
	669
	670	int CmdLFEM4X(const char *Cmd)
	671	{
	672	CmdsParse(CommandTable, Cmd);
	673	return 0;
	674	}
	675
	676	int CmdHelp(const char *Cmd)
	677	{
	678	CmdsHelp(CommandTable);
	679	return 0;
	680	}