[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(1);
  
  /* 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("64");

  /* 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("") 
	);
	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("Writing 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 = 16; //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("Writing 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);
a61b4976	60
a61b4976	61
7fe9b0b7	62	/* parity for our 4 columns */
	63	parity[0] = parity[1] = parity[2] = parity[3] = 0;
	64	header = rows = 0;
	65
	66	/* manchester demodulate */
	67	bit = bit2idx = 0;
	68	for (i = 0; i < (int)(GraphTraceLen / clock); i++)
	69	{
	70	hithigh = 0;
	71	hitlow = 0;
	72	first = 1;
	73
	74	/* Find out if we hit both high and low peaks */
	75	for (j = 0; j < clock; j++)
	76	{
	77	if (GraphBuffer[(i * clock) + j] == high)
	78	hithigh = 1;
	79	else if (GraphBuffer[(i * clock) + j] == low)
	80	hitlow = 1;
	81
	82	/* it doesn't count if it's the first part of our read
	83	because it's really just trailing from the last sequence */
	84	if (first && (hithigh \|\| hitlow))
	85	hithigh = hitlow = 0;
	86	else
	87	first = 0;
	88
	89	if (hithigh && hitlow)
	90	break;
	91	}
	92
	93	/* If we didn't hit both high and low peaks, we had a bit transition */
	94	if (!hithigh \|\| !hitlow)
	95	bit ^= 1;
	96
	97	BitStream[bit2idx++] = bit;
	98	}
	99
	100	retest:
	101	/* We go till 5 before the graph ends because we'll get that far below */
	102	for (i = 1; i < bit2idx - 5; i++)
	103	{
	104	/* Step 2: We have our header but need our tag ID */
	105	if (header == 9 && rows < 10)
	106	{
	107	/* Confirm parity is correct */
	108	if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
	109	{
	110	/* Read another byte! */
	111	sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
cb967ea9	112	sprintf(id2+rows, "%x", (8 * BitStream[i+3]) + (4 * BitStream[i+2]) + (2 * BitStream[i+1]) + (1 * BitStream[i]));
7fe9b0b7	113	rows++;
	114
	115	/* Keep parity info */
	116	parity[0] ^= BitStream[i];
	117	parity[1] ^= BitStream[i+1];
	118	parity[2] ^= BitStream[i+2];
	119	parity[3] ^= BitStream[i+3];
	120
	121	/* Move 4 bits ahead */
	122	i += 4;
	123	}
	124
	125	/* Damn, something wrong! reset */
	126	else
	127	{
	128	PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i);
	129
	130	/* Start back rows * 5 + 9 header bits, -1 to not start at same place */
	131	i -= 9 + (5 * rows) - 5;
	132
	133	rows = header = 0;
	134	}
	135	}
	136
	137	/* Step 3: Got our 40 bits! confirm column parity */
	138	else if (rows == 10)
	139	{
	140	/* We need to make sure our 4 bits of parity are correct and we have a stop bit */
	141	if (BitStream[i] == parity[0] && BitStream[i+1] == parity[1] &&
	142	BitStream[i+2] == parity[2] && BitStream[i+3] == parity[3] &&
	143	BitStream[i+4] == 0)
	144	{
	145	/* Sweet! */
	146	PrintAndLog("EM410x Tag ID: %s", id);
cb967ea9	147	PrintAndLog("Unique Tag ID: %s", id2);
7fe9b0b7	148
f38a1528	149	global_em410xId = id;
f38a1528	150
7fe9b0b7	151	/* Stop any loops */
	152	return 1;
	153	}
	154
	155	/* Crap! Incorrect parity or no stop bit, start all over */
	156	else
	157	{
	158	rows = header = 0;
	159
	160	/* Go back 59 bits (9 header bits + 10 rows at 4+1 parity) */
	161	i -= 59;
	162	}
	163	}
	164
	165	/* Step 1: get our header */
	166	else if (header < 9)
	167	{
	168	/* Need 9 consecutive 1's */
	169	if (BitStream[i] == 1)
	170	header++;
	171
	172	/* We don't have a header, not enough consecutive 1 bits */
	173	else
	174	header = 0;
	175	}
	176	}
	177
	178	/* if we've already retested after flipping bits, return */
f38a1528	179	if (retested++){
7fe9b0b7	180	return 0;
f38a1528	181	}
7fe9b0b7	182
	183	/* if this didn't work, try flipping bits */
	184	for (i = 0; i < bit2idx; i++)
	185	BitStream[i] ^= 1;
	186
	187	goto retest;
	188	}
	189
	190	/* emulate an EM410X tag
	191	* Format:
	192	* 1111 1111 1 <-- standard non-repeatable header
	193	* XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
	194	* ....
	195	* CCCC <-- each bit here is parity for the 10 bits above in corresponding column
	196	* 0 <-- stop bit, end of tag
	197	*/
	198	int CmdEM410xSim(const char *Cmd)
2ae8a312	199	{
	200	int i, n, j, h, binary[4], parity[4];
	201
	202	char cmdp = param_getchar(Cmd, 0);
	203	uint8_t uid[5] = {0x00};
	204
	205	if (cmdp == 'h' \|\| cmdp == 'H') {
	206	PrintAndLog("Usage: lf em4x sim <UID>");
	207	PrintAndLog("");
	208	PrintAndLog(" sample: lf em4x sim 0F0368568B");
	209	return 0;
	210	}
7fe9b0b7	211
2ae8a312	212	if (param_gethex(Cmd, 0, uid, 10)) {
	213	PrintAndLog("UID must include 10 HEX symbols");
	214	return 0;
	215	}
	216
	217	PrintAndLog("Starting simulating with UID %02X %02X %02X %02X %02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
	218
	219
7fe9b0b7	220	/* clock is 64 in EM410x tags */
	221	int clock = 64;
	222
	223	/* clear our graph */
a61b4976	224	ClearGraph(1);
7c756d68	225
7fe9b0b7	226	/* write it out a few times */
	227	for (h = 0; h < 4; h++)
	228	{
	229	/* write 9 start bits */
	230	for (i = 0; i < 9; i++)
	231	AppendGraph(0, clock, 1);
	232
	233	/* for each hex char */
	234	parity[0] = parity[1] = parity[2] = parity[3] = 0;
	235	for (i = 0; i < 10; i++)
	236	{
	237	/* read each hex char */
	238	sscanf(&Cmd[i], "%1x", &n);
	239	for (j = 3; j >= 0; j--, n/= 2)
	240	binary[j] = n % 2;
	241
	242	/* append each bit */
	243	AppendGraph(0, clock, binary[0]);
	244	AppendGraph(0, clock, binary[1]);
	245	AppendGraph(0, clock, binary[2]);
	246	AppendGraph(0, clock, binary[3]);
	247
	248	/* append parity bit */
	249	AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
	250
	251	/* keep track of column parity */
	252	parity[0] ^= binary[0];
	253	parity[1] ^= binary[1];
	254	parity[2] ^= binary[2];
	255	parity[3] ^= binary[3];
	256	}
	257
	258	/* parity columns */
	259	AppendGraph(0, clock, parity[0]);
	260	AppendGraph(0, clock, parity[1]);
	261	AppendGraph(0, clock, parity[2]);
	262	AppendGraph(0, clock, parity[3]);
	263
	264	/* stop bit */
	265	AppendGraph(0, clock, 0);
	266	}
	267
	268	/* modulate that biatch */
a61b4976	269	CmdManchesterMod("64");
7fe9b0b7	270
	271	/* booyah! */
	272	RepaintGraphWindow();
	273
a61b4976	274	CmdLFSim("");
7fe9b0b7	275	return 0;
	276	}
	277
c2d25819	278	/* Function is equivalent of lf read + data samples + em410xread
	279	* looped until an EM410x tag is detected
	280	*
	281	* Why is CmdSamples("16000")?
	282	* TBD: Auto-grow sample size based on detected sample rate. IE: If the
	283	* rate gets lower, then grow the number of samples
	284	* Changed by martin, 4000 x 4 = 16000,
	285	* see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
	286
	287	*/
7fe9b0b7	288	int CmdEM410xWatch(const char *Cmd)
7fe9b0b7	289	{
c2d25819	290	int read_h = (*Cmd == 'h');
	291	do
	292	{
2ae8a312	293	if (ukbhit()) {
	294	printf("\naborted via keyboard!\n");
	295	break;
	296	}
	297
c2d25819	298	CmdLFRead(read_h ? "h" : "");
a61b4976	299	CmdSamples("16000");
2ae8a312	300
c2d25819	301	} while (
a61b4976	302	!CmdEM410xRead("")
f38a1528	303	);
c2d25819	304	return 0;
f38a1528	305	}
	306
	307	int CmdEM410xWatchnSpoof(const char *Cmd)
	308	{
c2d25819	309	CmdEM410xWatch(Cmd);
f38a1528	310	PrintAndLog("# Replaying : %s",global_em410xId);
f38a1528	311	CmdEM410xSim(global_em410xId);
7fe9b0b7	312	return 0;
	313	}
	314
	315	/* Read the transmitted data of an EM4x50 tag
	316	* Format:
	317	*
	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	* XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
	322	* CCCCCCCC <- column parity bits
	323	* 0 <- stop bit
	324	* LW <- Listen Window
	325	*
	326	* This pattern repeats for every block of data being transmitted.
	327	* Transmission starts with two Listen Windows (LW - a modulated
	328	* pattern of 320 cycles each (32/32/128/64/64)).
	329	*
	330	* Note that this data may or may not be the UID. It is whatever data
	331	* is stored in the blocks defined in the control word First and Last
	332	* Word Read values. UID is stored in block 32.
	333	*/
	334	int CmdEM4x50Read(const char *Cmd)
	335	{
31b6e9af	336	int i, j, startblock, skip, block, start, end, low, high;
7fe9b0b7	337	bool complete= false;
	338	int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
	339	char tmp[6];
	340
	341	high= low= 0;
913d23c6	342	memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
7fe9b0b7	343
	344	/* first get high and low values */
	345	for (i = 0; i < GraphTraceLen; i++)
	346	{
	347	if (GraphBuffer[i] > high)
	348	high = GraphBuffer[i];
	349	else if (GraphBuffer[i] < low)
	350	low = GraphBuffer[i];
	351	}
	352
	353	/* populate a buffer with pulse lengths */
	354	i= 0;
	355	j= 0;
	356	while (i < GraphTraceLen)
	357	{
	358	// measure from low to low
	359	while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
	360	++i;
	361	start= i;
	362	while ((GraphBuffer[i] < high) && (i<GraphTraceLen))
	363	++i;
	364	while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
	365	++i;
a61b4976	366	if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
7fe9b0b7	367	break;
	368	}
	369	tmpbuff[j++]= i - start;
	370	}
	371
	372	/* look for data start - should be 2 pairs of LW (pulses of 192,128) */
	373	start= -1;
	374	skip= 0;
	375	for (i= 0; i < j - 4 ; ++i)
	376	{
	377	skip += tmpbuff[i];
	378	if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
	379	if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
	380	if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
	381	if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
	382	{
	383	start= i + 3;
	384	break;
	385	}
	386	}
	387	startblock= i + 3;
	388
	389	/* skip over the remainder of the LW */
	390	skip += tmpbuff[i+1]+tmpbuff[i+2];
	391	while (skip < MAX_GRAPH_TRACE_LEN && GraphBuffer[skip] > low)
	392	++skip;
	393	skip += 8;
	394
	395	/* now do it again to find the end */
	396	end= start;
	397	for (i += 3; i < j - 4 ; ++i)
	398	{
	399	end += tmpbuff[i];
	400	if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
	401	if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
	402	if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
	403	if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
	404	{
	405	complete= true;
	406	break;
	407	}
	408	}
	409
	410	if (start >= 0)
	411	PrintAndLog("Found data at sample: %i",skip);
	412	else
	413	{
	414	PrintAndLog("No data found!");
	415	PrintAndLog("Try again with more samples.");
	416	return 0;
	417	}
	418
	419	if (!complete)
	420	{
	421	PrintAndLog("*** Warning!");
	422	PrintAndLog("Partial data - no end found!");
	423	PrintAndLog("Try again with more samples.");
	424	}
	425
	426	/* get rid of leading crap */
	427	sprintf(tmp,"%i",skip);
	428	CmdLtrim(tmp);
	429
	430	/* now work through remaining buffer printing out data blocks */
431	block= 0;
432	i= startblock;
433	while (block < 6)
434	{
435	PrintAndLog("Block %i:", block);
436	// mandemod routine needs to be split so we can call it for data
437	// just print for now for debugging
438	CmdManchesterDemod("i 64");
439	skip= 0;
440	/* look for LW before start of next block */
441	for ( ; i < j - 4 ; ++i)
442	{
443	skip += tmpbuff[i];
444	if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
445	if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
446	break;
447	}
448	while (GraphBuffer[skip] > low)
449	++skip;
450	skip += 8;
451	sprintf(tmp,"%i",skip);
452	CmdLtrim(tmp);
453	start += skip;
454	block++;
455	}
456	return 0;
457	}
458
2d4eae76	459	int CmdEM410xWrite(const char *Cmd)
2d4eae76	460	{
e67b06b7	461	uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
7bb9d33e	462	int card = 0xFF; // invalid card value
e67b06b7	463	unsigned int clock = 0; // invalid clock value
	464
	465	sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
	466
	467	// Check ID
	468	if (id == 0xFFFFFFFFFFFFFFFF) {
	469	PrintAndLog("Error! ID is required.\n");
	470	return 0;
	471	}
	472	if (id >= 0x10000000000) {
	473	PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
	474	return 0;
	475	}
	476
	477	// Check Card
	478	if (card == 0xFF) {
	479	PrintAndLog("Error! Card type required.\n");
	480	return 0;
	481	}
	482	if (card < 0) {
	483	PrintAndLog("Error! Bad card type selected.\n");
	484	return 0;
	485	}
	486
	487	// Check Clock
	488	if (card == 1)
	489	{
	490	// Default: 64
	491	if (clock == 0)
	492	clock = 64;
	493
	494	// Allowed clock rates: 16, 32 and 64
	495	if ((clock != 16) && (clock != 32) && (clock != 64)) {
	496	PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock);
	497	return 0;
	498	}
	499	}
	500	else if (clock != 0)
	501	{
	502	PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n");
	503	return 0;
	504	}
	505
	506	if (card == 1) {
	507	PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
	508	// NOTE: We really should pass the clock in as a separate argument, but to
	509	// provide for backwards-compatibility for older firmware, and to avoid
	510	// having to add another argument to CMD_EM410X_WRITE_TAG, we just store
	511	// the clock rate in bits 8-15 of the card value
	512	card = (card & 0xFF) \| (((uint64_t)clock << 8) & 0xFF00);
	513	}
	514	else if (card == 0)
	515	PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
	516	else {
	517	PrintAndLog("Error! Bad card type selected.\n");
	518	return 0;
	519	}
2d4eae76	520
2d4eae76	521	UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
	522	SendCommand(&c);
	523
	524	return 0;
	525	}
	526
54a942b0	527	int CmdReadWord(const char *Cmd)
54a942b0	528	{
f38a1528	529	int Word = -1; //default to invalid word
b44e5233	530	UsbCommand c;
54a942b0	531
b44e5233	532	sscanf(Cmd, "%d", &Word);
54a942b0	533
f38a1528	534	if ( (Word > 15) \| (Word < 0) ) {
b44e5233	535	PrintAndLog("Word must be between 0 and 15");
	536	return 1;
	537	}
54a942b0	538
b44e5233	539	PrintAndLog("Reading word %d", Word);
54a942b0	540
b44e5233	541	c.cmd = CMD_EM4X_READ_WORD;
	542	c.d.asBytes[0] = 0x0; //Normal mode
	543	c.arg[0] = 0;
	544	c.arg[1] = Word;
	545	c.arg[2] = 0;
	546	SendCommand(&c);
f38a1528	547	WaitForResponse(CMD_ACK, NULL);
f38a1528	548
f6c18637	549	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
f38a1528	550
b44e5233	551	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset..
f38a1528	552	WaitForResponseTimeout(CMD_ACK,NULL, 1500);
f38a1528	553
b44e5233	554	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
f6c18637	555	GraphBuffer[j] = ((int)data[j]);
f38a1528	556	}
b44e5233	557	GraphTraceLen = LF_TRACE_BUFF_SIZE;
b44e5233	558
c6be64da	559	uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
b44e5233	560	uint8_t * bitstream = bits;
c6be64da	561	manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN);
f6c18637	562	RepaintGraphWindow();
54a942b0	563	return 0;
	564	}
	565
	566	int CmdReadWordPWD(const char *Cmd)
	567	{
f38a1528	568	int Word = -1; //default to invalid word
b44e5233	569	int Password = 0xFFFFFFFF; //default to blank password
	570	UsbCommand c;
	571
	572	sscanf(Cmd, "%d %x", &Word, &Password);
	573
f38a1528	574	if ( (Word > 15) \| (Word < 0) ) {
b44e5233	575	PrintAndLog("Word must be between 0 and 15");
	576	return 1;
	577	}
54a942b0	578
b44e5233	579	PrintAndLog("Reading word %d with password %08X", Word, Password);
	580
	581	c.cmd = CMD_EM4X_READ_WORD;
	582	c.d.asBytes[0] = 0x1; //Password mode
	583	c.arg[0] = 0;
	584	c.arg[1] = Word;
	585	c.arg[2] = Password;
	586	SendCommand(&c);
f38a1528	587	WaitForResponse(CMD_ACK, NULL);
b44e5233	588
f6c18637	589	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
f38a1528	590
b44e5233	591	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset..
f38a1528	592	WaitForResponseTimeout(CMD_ACK,NULL, 1500);
f38a1528	593
b44e5233	594	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
f6c18637	595	GraphBuffer[j] = ((int)data[j]);
f38a1528	596	}
b44e5233	597	GraphTraceLen = LF_TRACE_BUFF_SIZE;
b44e5233	598
c6be64da	599	uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
	600	uint8_t * bitstream = bits;
	601	manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN);
f6c18637	602	RepaintGraphWindow();
54a942b0	603	return 0;
	604	}
	605
	606	int CmdWriteWord(const char *Cmd)
	607	{
	608	int Word = 16; //default to invalid block
	609	int Data = 0xFFFFFFFF; //default to blank data
	610	UsbCommand c;
	611
	612	sscanf(Cmd, "%x %d", &Data, &Word);
	613
	614	if (Word > 15) {
	615	PrintAndLog("Word must be between 0 and 15");
	616	return 1;
	617	}
	618
a61b4976	619	PrintAndLog("Writing word %d with data %08X", Word, Data);
54a942b0	620
	621	c.cmd = CMD_EM4X_WRITE_WORD;
	622	c.d.asBytes[0] = 0x0; //Normal mode
	623	c.arg[0] = Data;
	624	c.arg[1] = Word;
	625	c.arg[2] = 0;
	626	SendCommand(&c);
	627	return 0;
	628	}
	629
	630	int CmdWriteWordPWD(const char *Cmd)
	631	{
a61b4976	632	int Word = 16; //default to invalid word
54a942b0	633	int Data = 0xFFFFFFFF; //default to blank data
	634	int Password = 0xFFFFFFFF; //default to blank password
	635	UsbCommand c;
	636
	637	sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
	638
	639	if (Word > 15) {
	640	PrintAndLog("Word must be between 0 and 15");
	641	return 1;
	642	}
	643
a61b4976	644	PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);
54a942b0	645
	646	c.cmd = CMD_EM4X_WRITE_WORD;
	647	c.d.asBytes[0] = 0x1; //Password mode
	648	c.arg[0] = Data;
	649	c.arg[1] = Word;
	650	c.arg[2] = Password;
	651	SendCommand(&c);
	652	return 0;
	653	}
	654
2d4eae76	655	static command_t CommandTable[] =
7fe9b0b7	656	{
54a942b0	657	{"help", CmdHelp, 1, "This help"},
c2d25819	658	{"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
	659	{"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
	660	{"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
	661	{"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
	662	{"410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
	663	{"4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
f38a1528	664	{"rd", CmdReadWord, 1, "<Word 1-15> -- Read EM4xxx word data"},
	665	{"rdpwd", CmdReadWordPWD, 1, "<Word 1-15> <Password> -- Read EM4xxx word data in password mode "},
	666	{"wr", CmdWriteWord, 1, "<Data> <Word 1-15> -- Write EM4xxx word data"},
	667	{"wrpwd", CmdWriteWordPWD, 1, "<Data> <Word 1-15> <Password> -- Write EM4xxx word data in password mode"},
7fe9b0b7	668	{NULL, NULL, 0, NULL}
	669	};
	670
	671	int CmdLFEM4X(const char *Cmd)
	672	{
	673	CmdsParse(CommandTable, Cmd);
	674	return 0;
	675	}
	676
	677	int CmdHelp(const char *Cmd)
	678	{
	679	CmdsHelp(CommandTable);
	680	return 0;
	681	}