git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfem4x.c

   1 //-----------------------------------------------------------------------------
   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
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <inttypes.h>
  14 #include "cmdlfem4x.h"
  15
  16 uint64_t g_em410xid = 0;
  17
  18 static int CmdHelp(const char *Cmd);
  19
  20 int CmdEMdemodASK(const char *Cmd)
  21 {
  22         char cmdp = param_getchar(Cmd, 0);
  23         int findone = (cmdp == '1') ? 1 : 0;
  24         UsbCommand c={CMD_EM410X_DEMOD};
  25         c.arg[0]=findone;
  26         SendCommand(&c);
  27         return 0;
  28 }
  29
  30 /* Read the ID of an EM410x tag.
  31  * Format:
  32  *   1111 1111 1           <-- standard non-repeatable header
  33  *   XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
  34  *   ....
  35  *   CCCC                  <-- each bit here is parity for the 10 bits above in corresponding column
  36  *   0                     <-- stop bit, end of tag
  37  */
  38 int CmdEM410xRead(const char *Cmd)
  39 {
  40         uint32_t hi=0;
  41         uint64_t lo=0;
  42
  43         if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
  44         PrintAndLog("EM410x pattern found: ");
  45         printEM410x(hi, lo);
  46         if (hi){
  47                 PrintAndLog ("EM410x XL pattern found");
  48                 return 0;
  49         }
  50         g_em410xid = lo;
  51         return 1;
  52 }
  53
  54 // emulate an EM410X tag
  55 int CmdEM410xSim(const char *Cmd)
  56 {
  57         int i, n, j, binary[4], parity[4];
  58         uint8_t uid[5] = {0x00};
  59
  60         char cmdp = param_getchar(Cmd, 0);
  61         if (cmdp == 'h' || cmdp == 'H') {
  62                 PrintAndLog("Usage:  lf em4x em410xsim <UID> <clock>");
  63                 PrintAndLog("");
  64                 PrintAndLog("     sample: lf em4x em410xsim 0F0368568B");
  65                 return 0;
  66         }
  67         /* clock is 64 in EM410x tags */
  68         uint8_t clock = 64;
  69
  70         if (param_gethex(Cmd, 0, uid, 10)) {
  71                 PrintAndLog("UID must include 10 HEX symbols");
  72                 return 0;
  73         }
  74         param_getdec(Cmd, 1, &clock);
  75
  76         PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X  clock: %d", uid[0],uid[1],uid[2],uid[3],uid[4],clock);
  77         PrintAndLog("Press pm3-button to about simulation");
  78
  79         /* clear our graph */
  80         ClearGraph(0);
  81
  82         /* write 9 start bits */
  83         for (i = 0; i < 9; i++)
  84                 AppendGraph(0, clock, 1);
  85
  86         /* for each hex char */
  87         parity[0] = parity[1] = parity[2] = parity[3] = 0;
  88         for (i = 0; i < 10; i++)
  89         {
  90                 /* read each hex char */
  91                 sscanf(&Cmd[i], "%1x", &n);
  92                 for (j = 3; j >= 0; j--, n/= 2)
  93                         binary[j] = n % 2;
  94
  95                 /* append each bit */
  96                 AppendGraph(0, clock, binary[0]);
  97                 AppendGraph(0, clock, binary[1]);
  98                 AppendGraph(0, clock, binary[2]);
  99                 AppendGraph(0, clock, binary[3]);
 100
 101                 /* append parity bit */
 102                 AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
 103
 104                 /* keep track of column parity */
 105                 parity[0] ^= binary[0];
 106                 parity[1] ^= binary[1];
 107                 parity[2] ^= binary[2];
 108                 parity[3] ^= binary[3];
 109         }
 110
 111         /* parity columns */
 112         AppendGraph(0, clock, parity[0]);
 113         AppendGraph(0, clock, parity[1]);
 114         AppendGraph(0, clock, parity[2]);
 115         AppendGraph(0, clock, parity[3]);
 116
 117         /* stop bit */
 118         AppendGraph(1, clock, 0);
 119
 120         CmdLFSim("0"); //240 start_gap.
 121         return 0;
 122 }
 123
 124 /* Function is equivalent of lf read + data samples + em410xread
 125  * looped until an EM410x tag is detected
 126  *
 127  * Why is CmdSamples("16000")?
 128  *  TBD: Auto-grow sample size based on detected sample rate.  IE: If the
 129  *       rate gets lower, then grow the number of samples
 130  *  Changed by martin, 4000 x 4 = 16000,
 131  *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
 132 */
 133 int CmdEM410xWatch(const char *Cmd)
 134 {
 135         do {
 136                 if (ukbhit()) {
 137                         printf("\naborted via keyboard!\n");
 138                         break;
 139                 }
 140
 141                 CmdLFRead("s");
 142                 getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)
 143         } while (!CmdEM410xRead(""));
 144
 145         return 0;
 146 }
 147
 148 //currently only supports manchester modulations
 149 // todo: helptext
 150 int CmdEM410xWatchnSpoof(const char *Cmd)
 151 {
 152         // loops if the captured ID was in XL-format.
 153         uint8_t ans = 0;
 154         do {
 155                 ans = CmdEM410xWatch(Cmd);
 156                 if ( ans ) {
 157                         PrintAndLog("# Replaying captured ID: %llu", g_em410xid);
 158                         CmdLFaskSim("");
 159                 }
 160         } while ( !ans );
 161         return 0;
 162 }
 163
 164 int CmdEM410xWrite(const char *Cmd)
 165 {
 166         uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
 167         int card = 0xFF; // invalid card value
 168         uint32_t clock = 0; // invalid clock value
 169
 170         sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
 171
 172         // Check ID
 173         if (id == 0xFFFFFFFFFFFFFFFF) {
 174                 PrintAndLog("Error! ID is required.\n");
 175                 return 0;
 176         }
 177         if (id >= 0x10000000000) {
 178                 PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
 179                 return 0;
 180         }
 181
 182         // Check Card
 183         if (card == 0xFF) {
 184                 PrintAndLog("Error! Card type required.\n");
 185                 return 0;
 186         }
 187         if (card < 0) {
 188                 PrintAndLog("Error! Bad card type selected.\n");
 189                 return 0;
 190         }
 191
 192         // Check Clock
 193                 // Default: 64
 194         if (clock == 0)
 195                 clock = 64;
 196
 197         // Allowed clock rates: 16, 32, 40 and 64
 198         if ((clock != 16) && (clock != 32) && (clock != 64) && (clock != 40)) {
 199                 PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32, 40 and 64.\n", clock);
 200                 return 0;
 201         }
 202
 203         if (card == 1) {
 204                 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
 205                 // NOTE: We really should pass the clock in as a separate argument, but to
 206                 //   provide for backwards-compatibility for older firmware, and to avoid
 207                 //   having to add another argument to CMD_EM410X_WRITE_TAG, we just store
 208                 //   the clock rate in bits 8-15 of the card value
 209                 card = (card & 0xFF) | ((clock << 8) & 0xFF00);
 210         }       else if (card == 0) {
 211                 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
 212                 card = (card & 0xFF) | ((clock << 8) & 0xFF00);
 213         } else {
 214                 PrintAndLog("Error! Bad card type selected.\n");
 215                 return 0;
 216         }
 217
 218         UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
 219         SendCommand(&c);
 220         return 0;
 221 }
 222
 223 bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
 224 {
 225         if (rows*cols>size) return false;
 226         uint8_t colP=0;
 227         //assume last col is a parity and do not test
 228         for (uint8_t colNum = 0; colNum < cols-1; colNum++) {
 229                 for (uint8_t rowNum = 0; rowNum < rows; rowNum++) {
 230                         colP ^= BitStream[(rowNum*cols)+colNum];
 231                 }
 232                 if (colP != pType) return false;
 233         }
 234         return true;
 235 }
 236
 237 bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
 238 {
 239         if (rows*cols>size) return false;
 240         uint8_t rowP=0;
 241         //assume last row is a parity row and do not test
 242         for (uint8_t rowNum = 0; rowNum < rows-1; rowNum++) {
 243                 for (uint8_t colNum = 0; colNum < cols; colNum++) {
 244                         rowP ^= BitStream[(rowNum*cols)+colNum];
 245                 }
 246                 if (rowP != pType) return false;
 247         }
 248         return true;
 249 }
 250
 251 uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)
 252 {
 253         if (size<45) return 0;
 254         uint32_t code = bytebits_to_byte(BitStream,8);
 255         code = code<<8 | bytebits_to_byte(BitStream+9,8);
 256         code = code<<8 | bytebits_to_byte(BitStream+18,8);
 257         code = code<<8 | bytebits_to_byte(BitStream+27,8);
 258         if (verbose || g_debugMode){
 259                 for (uint8_t i = 0; i<5; i++){
 260                         if (i == 4) PrintAndLog(""); //parity byte spacer
 261                         PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x",
 262                             BitStream[i*9],
 263                             BitStream[i*9+1],
 264                             BitStream[i*9+2],
 265                             BitStream[i*9+3],
 266                             BitStream[i*9+4],
 267                             BitStream[i*9+5],
 268                             BitStream[i*9+6],
 269                             BitStream[i*9+7],
 270                             BitStream[i*9+8],
 271                             bytebits_to_byte(BitStream+i*9,8)
 272                         );
 273                 }
 274                 if (pTest)
 275                         PrintAndLog("Parity Passed");
 276                 else
 277                         PrintAndLog("Parity Failed");
 278         }
 279         return code;
 280 }
 281 /* Read the transmitted data of an EM4x50 tag
 282  * Format:
 283  *
 284  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 285  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 286  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 287  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 288  *  CCCCCCCC                         <- column parity bits
 289  *  0                                <- stop bit
 290  *  LW                               <- Listen Window
 291  *
 292  * This pattern repeats for every block of data being transmitted.
 293  * Transmission starts with two Listen Windows (LW - a modulated
 294  * pattern of 320 cycles each (32/32/128/64/64)).
 295  *
 296  * Note that this data may or may not be the UID. It is whatever data
 297  * is stored in the blocks defined in the control word First and Last
 298  * Word Read values. UID is stored in block 32.
 299  */
 300  //completed by Marshmellow
 301 int EM4x50Read(const char *Cmd, bool verbose)
 302 {
 303         uint8_t fndClk[] = {8,16,32,40,50,64,128};
 304         int clk = 0;
 305         int invert = 0;
 306         int tol = 0;
 307         int i, j, startblock, skip, block, start, end, low, high, minClk;
 308         bool complete = false;
 309         int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
 310         uint32_t Code[6];
 311         char tmp[6];
 312         char tmp2[20];
 313         int phaseoff;
 314         high = low = 0;
 315         memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
 316
 317         // get user entry if any
 318         sscanf(Cmd, "%i %i", &clk, &invert);
 319
 320         // save GraphBuffer - to restore it later
 321         save_restoreGB(1);
 322
 323         // first get high and low values
 324         for (i = 0; i < GraphTraceLen; i++) {
 325                 if (GraphBuffer[i] > high)
 326                         high = GraphBuffer[i];
 327                 else if (GraphBuffer[i] < low)
 328                         low = GraphBuffer[i];
 329         }
 330
 331         i = 0;
 332         j = 0;
 333         minClk = 255;
 334         // get to first full low to prime loop and skip incomplete first pulse
 335         while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
 336                 ++i;
 337         while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
 338                 ++i;
 339         skip = i;
 340
 341         // populate tmpbuff buffer with pulse lengths
 342         while (i < GraphTraceLen) {
 343                 // measure from low to low
 344                 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
 345                         ++i;
 346                 start= i;
 347                 while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
 348                         ++i;
 349                 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
 350                         ++i;
 351                 if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
 352                         break;
 353                 }
 354                 tmpbuff[j++]= i - start;
 355                 if (i-start < minClk && i < GraphTraceLen) {
 356                         minClk = i - start;
 357                 }
 358         }
 359         // set clock
 360         if (!clk) {
 361                 for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
 362                         tol = fndClk[clkCnt]/8;
 363                         if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) {
 364                                 clk=fndClk[clkCnt];
 365                                 break;
 366                         }
 367                 }
 368                 if (!clk) return 0;
 369         } else tol = clk/8;
 370
 371         // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2)
 372         start = -1;
 373         for (i= 0; i < j - 4 ; ++i) {
 374                 skip += tmpbuff[i];
 375                 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)  //3 clocks
 376                         if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol)  //2 clocks
 377                                 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
 378                                         if (tmpbuff[i+3] >= clk-tol)  //1.5 to 2 clocks - depends on bit following
 379                                         {
 380                                                 start= i + 4;
 381                                                 break;
 382                                         }
 383         }
 384         startblock = i + 4;
 385
 386         // skip over the remainder of LW
 387         skip += tmpbuff[i+1] + tmpbuff[i+2] + clk;
 388         if (tmpbuff[i+3]>clk)
 389                 phaseoff = tmpbuff[i+3]-clk;
 390         else
 391                 phaseoff = 0;
 392         // now do it again to find the end
 393         end = skip;
 394         for (i += 3; i < j - 4 ; ++i) {
 395                 end += tmpbuff[i];
 396                 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)  //3 clocks
 397                         if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol)  //2 clocks
 398                                 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
 399                                         if (tmpbuff[i+3] >= clk-tol)  //1.5 to 2 clocks - depends on bit following
 400                                         {
 401                                                 complete= true;
 402                                                 break;
 403                                         }
 404         }
 405         end = i;
 406         // report back
 407         if (verbose || g_debugMode) {
 408                 if (start >= 0) {
 409                         PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)");
 410                 }       else {
 411                         PrintAndLog("No data found!, clock tried:%d",clk);
 412                         PrintAndLog("Try again with more samples.");
 413                         PrintAndLog("  or after a 'data askedge' command to clean up the read");
 414                         return 0;
 415                 }
 416         } else if (start < 0) return 0;
 417         start = skip;
 418         snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47);
 419         // get rid of leading crap
 420         snprintf(tmp, sizeof(tmp), "%i", skip);
 421         CmdLtrim(tmp);
 422         bool pTest;
 423         bool AllPTest = true;
 424         // now work through remaining buffer printing out data blocks
 425         block = 0;
 426         i = startblock;
 427         while (block < 6) {
 428                 if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block);
 429                 skip = phaseoff;
 430
 431                 // look for LW before start of next block
 432                 for ( ; i < j - 4 ; ++i) {
 433                         skip += tmpbuff[i];
 434                         if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)
 435                                 if (tmpbuff[i+1] >= clk-tol)
 436                                         break;
 437                 }
 438                 if (i >= j-4) break; //next LW not found
 439                 skip += clk;
 440                 if (tmpbuff[i+1]>clk)
 441                         phaseoff = tmpbuff[i+1]-clk;
 442                 else
 443                         phaseoff = 0;
 444                 i += 2;
 445                 if (ASKDemod(tmp2, false, false, 1) < 1) {
 446                         save_restoreGB(0);
 447                         return 0;
 448                 }
 449                 //set DemodBufferLen to just one block
 450                 DemodBufferLen = skip/clk;
 451                 //test parities
 452                 pTest = EM_ByteParityTest(DemodBuffer,DemodBufferLen,5,9,0);
 453                 pTest &= EM_EndParityTest(DemodBuffer,DemodBufferLen,5,9,0);
 454                 AllPTest &= pTest;
 455                 //get output
 456                 Code[block] = OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest);
 457                 if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d", skip, skip/clk);
 458                 //skip to start of next block
 459                 snprintf(tmp,sizeof(tmp),"%i",skip);
 460                 CmdLtrim(tmp);
 461                 block++;
 462                 if (i >= end) break; //in case chip doesn't output 6 blocks
 463         }
 464         //print full code:
 465         if (verbose || g_debugMode || AllPTest){
 466                 if (!complete) {
 467                         PrintAndLog("*** Warning!");
 468                         PrintAndLog("Partial data - no end found!");
 469                         PrintAndLog("Try again with more samples.");
 470                 }
 471                 PrintAndLog("Found data at sample: %i - using clock: %i", start, clk);
 472                 end = block;
 473                 for (block=0; block < end; block++){
 474                         PrintAndLog("Block %d: %08x",block,Code[block]);
 475                 }
 476                 if (AllPTest) {
 477                         PrintAndLog("Parities Passed");
 478                 } else {
 479                         PrintAndLog("Parities Failed");
 480                         PrintAndLog("Try cleaning the read samples with 'data askedge'");
 481                 }
 482         }
 483
 484         //restore GraphBuffer
 485         save_restoreGB(0);
 486         return (int)AllPTest;
 487 }
 488
 489 int CmdEM4x50Read(const char *Cmd)
 490 {
 491         return EM4x50Read(Cmd, true);
 492 }
 493
 494 int CmdReadWord(const char *Cmd)
 495 {
 496         int Word = -1; //default to invalid word
 497         UsbCommand c;
 498
 499         sscanf(Cmd, "%d", &Word);
 500
 501         if ( (Word > 15) | (Word < 0) ) {
 502                 PrintAndLog("Word must be between 0 and 15");
 503                 return 1;
 504         }
 505
 506         PrintAndLog("Reading word %d", Word);
 507
 508         c.cmd = CMD_EM4X_READ_WORD;
 509         c.d.asBytes[0] = 0x0; //Normal mode
 510         c.arg[0] = 0;
 511         c.arg[1] = Word;
 512         c.arg[2] = 0;
 513         SendCommand(&c);
 514         return 0;
 515 }
 516
 517 int CmdReadWordPWD(const char *Cmd)
 518 {
 519         int Word = -1; //default to invalid word
 520         int Password = 0xFFFFFFFF; //default to blank password
 521         UsbCommand c;
 522
 523         sscanf(Cmd, "%d %x", &Word, &Password);
 524
 525         if ( (Word > 15) | (Word < 0) ) {
 526                 PrintAndLog("Word must be between 0 and 15");
 527                 return 1;
 528         }
 529
 530         PrintAndLog("Reading word %d with password %08X", Word, Password);
 531
 532         c.cmd = CMD_EM4X_READ_WORD;
 533         c.d.asBytes[0] = 0x1; //Password mode
 534         c.arg[0] = 0;
 535         c.arg[1] = Word;
 536         c.arg[2] = Password;
 537         SendCommand(&c);
 538         return 0;
 539 }
 540
 541 int CmdWriteWord(const char *Cmd)
 542 {
 543         int Word = 16; //default to invalid block
 544         int Data = 0xFFFFFFFF; //default to blank data
 545         UsbCommand c;
 546
 547         sscanf(Cmd, "%x %d", &Data, &Word);
 548
 549         if (Word > 15) {
 550                 PrintAndLog("Word must be between 0 and 15");
 551                 return 1;
 552         }
 553
 554         PrintAndLog("Writing word %d with data %08X", Word, Data);
 555
 556         c.cmd = CMD_EM4X_WRITE_WORD;
 557         c.d.asBytes[0] = 0x0; //Normal mode
 558         c.arg[0] = Data;
 559         c.arg[1] = Word;
 560         c.arg[2] = 0;
 561         SendCommand(&c);
 562         return 0;
 563 }
 564
 565 int CmdWriteWordPWD(const char *Cmd)
 566 {
 567         int Word = 16; //default to invalid word
 568         int Data = 0xFFFFFFFF; //default to blank data
 569         int Password = 0xFFFFFFFF; //default to blank password
 570         UsbCommand c;
 571
 572         sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
 573
 574         if (Word > 15) {
 575                 PrintAndLog("Word must be between 0 and 15");
 576                 return 1;
 577         }
 578
 579         PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);
 580
 581         c.cmd = CMD_EM4X_WRITE_WORD;
 582         c.d.asBytes[0] = 0x1; //Password mode
 583         c.arg[0] = Data;
 584         c.arg[1] = Word;
 585         c.arg[2] = Password;
 586         SendCommand(&c);
 587         return 0;
 588 }
 589
 590 static command_t CommandTable[] =
 591 {
 592         {"help", CmdHelp, 1, "This help"},
 593         {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
 594         {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"},
 595         {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
 596         {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
 597         {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
 598         {"em410xwrite", CmdEM410xWrite, 0, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
 599         {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
 600         {"readword", CmdReadWord, 1, "<Word> -- Read EM4xxx word data"},
 601         {"readwordPWD", CmdReadWordPWD, 1, "<Word> <Password> -- Read EM4xxx word data in password mode"},
 602         {"writeword", CmdWriteWord, 1, "<Data> <Word> -- Write EM4xxx word data"},
 603         {"writewordPWD", CmdWriteWordPWD, 1, "<Data> <Word> <Password> -- Write EM4xxx word data in password mode"},
 604         {NULL, NULL, 0, NULL}
 605 };
 606
 607 int CmdLFEM4X(const char *Cmd) {
 608         clearCommandBuffer();
 609         CmdsParse(CommandTable, Cmd);
 610         return 0;
 611 }
 612
 613 int CmdHelp(const char *Cmd) {
 614         CmdsHelp(CommandTable);
 615         return 0;
 616 }