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 "proxmark3.h"
  15 #include "ui.h"
  16 #include "util.h"
  17 #include "graph.h"
  18 #include "cmdparser.h"
  19 #include "cmddata.h"
  20 #include "cmdlf.h"
  21 #include "cmdlfem4x.h"
  22 #include "lfdemod.h"
  23
  24 #define llx PRIx64
  25
  26 char *global_em410xId;
  27
  28 static int CmdHelp(const char *Cmd);
  29
  30 int CmdEMdemodASK(const char *Cmd)
  31 {
  32         char cmdp = param_getchar(Cmd, 0);
  33         int findone = (cmdp == '1') ? 1 : 0;
  34         UsbCommand c={CMD_EM410X_DEMOD};
  35         c.arg[0]=findone;
  36         SendCommand(&c);
  37         return 0;
  38 }
  39
  40 /* Read the ID of an EM410x tag.
  41  * Format:
  42  *   1111 1111 1           <-- standard non-repeatable header
  43  *   XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
  44  *   ....
  45  *   CCCC                  <-- each bit here is parity for the 10 bits above in corresponding column
  46  *   0                     <-- stop bit, end of tag
  47  */
  48 int CmdEM410xRead(const char *Cmd)
  49 {
  50         uint32_t hi=0;
  51         uint64_t lo=0;
  52
  53         if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
  54         PrintAndLog("EM410x pattern found: ");
  55         printEM410x(hi, lo);
  56         if (hi){
  57                 PrintAndLog ("EM410x XL pattern found");
  58                 return 0;
  59         }
  60         char id[12] = {0x00};
  61         sprintf(id, "%010llx",lo);
  62
  63         global_em410xId = id;
  64         return 1;
  65 }
  66
  67 // emulate an EM410X tag
  68 int CmdEM410xSim(const char *Cmd)
  69 {
  70         int i, n, j, binary[4], parity[4];
  71
  72         char cmdp = param_getchar(Cmd, 0);
  73         uint8_t uid[5] = {0x00};
  74
  75         if (cmdp == 'h' || cmdp == 'H') {
  76                 PrintAndLog("Usage:  lf em4x 410xsim <UID>");
  77                 PrintAndLog("");
  78                 PrintAndLog("     sample: lf em4x 410xsim 0F0368568B");
  79                 return 0;
  80         }
  81
  82         if (param_gethex(Cmd, 0, uid, 10)) {
  83                 PrintAndLog("UID must include 10 HEX symbols");
  84                 return 0;
  85         }
  86
  87         PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
  88         PrintAndLog("Press pm3-button to about simulation");
  89
  90         /* clock is 64 in EM410x tags */
  91         int clock = 64;
  92
  93         /* clear our graph */
  94         ClearGraph(0);
  95
  96                 /* write 9 start bits */
  97                 for (i = 0; i < 9; i++)
  98                         AppendGraph(0, clock, 1);
  99
 100                 /* for each hex char */
 101                 parity[0] = parity[1] = parity[2] = parity[3] = 0;
 102                 for (i = 0; i < 10; i++)
 103                 {
 104                         /* read each hex char */
 105                         sscanf(&Cmd[i], "%1x", &n);
 106                         for (j = 3; j >= 0; j--, n/= 2)
 107                                 binary[j] = n % 2;
 108
 109                         /* append each bit */
 110                         AppendGraph(0, clock, binary[0]);
 111                         AppendGraph(0, clock, binary[1]);
 112                         AppendGraph(0, clock, binary[2]);
 113                         AppendGraph(0, clock, binary[3]);
 114
 115                         /* append parity bit */
 116                         AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
 117
 118                         /* keep track of column parity */
 119                         parity[0] ^= binary[0];
 120                         parity[1] ^= binary[1];
 121                         parity[2] ^= binary[2];
 122                         parity[3] ^= binary[3];
 123                 }
 124
 125                 /* parity columns */
 126                 AppendGraph(0, clock, parity[0]);
 127                 AppendGraph(0, clock, parity[1]);
 128                 AppendGraph(0, clock, parity[2]);
 129                 AppendGraph(0, clock, parity[3]);
 130
 131                 /* stop bit */
 132         AppendGraph(1, clock, 0);
 133
 134         CmdLFSim("0"); //240 start_gap.
 135         return 0;
 136 }
 137
 138 /* Function is equivalent of lf read + data samples + em410xread
 139  * looped until an EM410x tag is detected
 140  *
 141  * Why is CmdSamples("16000")?
 142  *  TBD: Auto-grow sample size based on detected sample rate.  IE: If the
 143  *       rate gets lower, then grow the number of samples
 144  *  Changed by martin, 4000 x 4 = 16000,
 145  *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
 146 */
 147 int CmdEM410xWatch(const char *Cmd)
 148 {
 149         do {
 150                 if (ukbhit()) {
 151                         printf("\naborted via keyboard!\n");
 152                         break;
 153                 }
 154
 155                 CmdLFRead("s");
 156                 getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)
 157         } while (!CmdEM410xRead(""));
 158
 159         return 0;
 160 }
 161
 162 //currently only supports manchester modulations
 163 int CmdEM410xWatchnSpoof(const char *Cmd)
 164 {
 165         CmdEM410xWatch(Cmd);
 166         PrintAndLog("# Replaying captured ID: %s",global_em410xId);
 167         CmdLFaskSim("");
 168         return 0;
 169 }
 170
 171 int CmdEM410xWrite(const char *Cmd)
 172 {
 173         uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
 174         int card = 0xFF; // invalid card value
 175         unsigned int clock = 0; // invalid clock value
 176
 177         sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
 178
 179         // Check ID
 180         if (id == 0xFFFFFFFFFFFFFFFF) {
 181                 PrintAndLog("Error! ID is required.\n");
 182                 return 0;
 183         }
 184         if (id >= 0x10000000000) {
 185                 PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
 186                 return 0;
 187         }
 188
 189         // Check Card
 190         if (card == 0xFF) {
 191                 PrintAndLog("Error! Card type required.\n");
 192                 return 0;
 193         }
 194         if (card < 0) {
 195                 PrintAndLog("Error! Bad card type selected.\n");
 196                 return 0;
 197         }
 198
 199         // Check Clock
 200         if (card == 1)
 201         {
 202                 // Default: 64
 203                 if (clock == 0)
 204                         clock = 64;
 205
 206                 // Allowed clock rates: 16, 32 and 64
 207                 if ((clock != 16) && (clock != 32) && (clock != 64)) {
 208                         PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock);
 209                         return 0;
 210                 }
 211         }
 212         else if (clock != 0)
 213         {
 214                 PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n");
 215                 return 0;
 216         }
 217
 218         if (card == 1) {
 219                 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
 220                 // NOTE: We really should pass the clock in as a separate argument, but to
 221                 //   provide for backwards-compatibility for older firmware, and to avoid
 222                 //   having to add another argument to CMD_EM410X_WRITE_TAG, we just store
 223                 //   the clock rate in bits 8-15 of the card value
 224                 card = (card & 0xFF) | (((uint64_t)clock << 8) & 0xFF00);
 225         }
 226         else if (card == 0)
 227                 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
 228         else {
 229                 PrintAndLog("Error! Bad card type selected.\n");
 230                 return 0;
 231         }
 232
 233         UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
 234         SendCommand(&c);
 235
 236         return 0;
 237 }
 238
 239 bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
 240 {
 241         if (rows*cols>size) return false;
 242         uint8_t colP=0;
 243         //assume last col is a parity and do not test
 244         for (uint8_t colNum = 0; colNum < cols-1; colNum++) {
 245                 for (uint8_t rowNum = 0; rowNum < rows; rowNum++) {
 246                         colP ^= BitStream[(rowNum*cols)+colNum];
 247                 }
 248                 if (colP != pType) return false;
 249         }
 250         return true;
 251 }
 252
 253 bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
 254 {
 255         if (rows*cols>size) return false;
 256         uint8_t rowP=0;
 257         //assume last row is a parity row and do not test
 258         for (uint8_t rowNum = 0; rowNum < rows-1; rowNum++) {
 259                 for (uint8_t colNum = 0; colNum < cols; colNum++) {
 260                         rowP ^= BitStream[(rowNum*cols)+colNum];
 261                 }
 262                 if (rowP != pType) return false;
 263         }
 264         return true;
 265 }
 266
 267 uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)
 268 {
 269         if (size<45) return 0;
 270         uint32_t code = bytebits_to_byte(BitStream,8);
 271         code = code<<8 | bytebits_to_byte(BitStream+9,8);
 272         code = code<<8 | bytebits_to_byte(BitStream+18,8);
 273         code = code<<8 | bytebits_to_byte(BitStream+27,8);
 274         if (verbose || g_debugMode){
 275                 for (uint8_t i = 0; i<5; i++){
 276                         if (i == 4) PrintAndLog(""); //parity byte spacer
 277                         PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x",
 278                             BitStream[i*9],
 279                             BitStream[i*9+1],
 280                             BitStream[i*9+2],
 281                             BitStream[i*9+3],
 282                             BitStream[i*9+4],
 283                             BitStream[i*9+5],
 284                             BitStream[i*9+6],
 285                             BitStream[i*9+7],
 286                             BitStream[i*9+8],
 287                             bytebits_to_byte(BitStream+i*9,8)
 288                         );
 289                 }
 290                 if (pTest)
 291                         PrintAndLog("Parity Passed");
 292                 else
 293                         PrintAndLog("Parity Failed");
 294         }
 295         return code;
 296 }
 297 /* Read the transmitted data of an EM4x50 tag
 298  * Format:
 299  *
 300  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 301  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 302  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 303  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
 304  *  CCCCCCCC                         <- column parity bits
 305  *  0                                <- stop bit
 306  *  LW                               <- Listen Window
 307  *
 308  * This pattern repeats for every block of data being transmitted.
 309  * Transmission starts with two Listen Windows (LW - a modulated
 310  * pattern of 320 cycles each (32/32/128/64/64)).
 311  *
 312  * Note that this data may or may not be the UID. It is whatever data
 313  * is stored in the blocks defined in the control word First and Last
 314  * Word Read values. UID is stored in block 32.
 315  */
 316  //completed by Marshmellow
 317 int EM4x50Read(const char *Cmd, bool verbose)
 318 {
 319         uint8_t fndClk[] = {8,16,32,40,50,64,128};
 320         int clk = 0;
 321         int invert = 0;
 322         int tol = 0;
 323         int i, j, startblock, skip, block, start, end, low, high, minClk;
 324         bool complete = false;
 325         int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
 326         uint32_t Code[6];
 327         char tmp[6];
 328         char tmp2[20];
 329         int phaseoff;
 330         high = low = 0;
 331         memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
 332
 333         // get user entry if any
 334         sscanf(Cmd, "%i %i", &clk, &invert);
 335
 336         // save GraphBuffer - to restore it later
 337         save_restoreGB(1);
 338
 339         // first get high and low values
 340         for (i = 0; i < GraphTraceLen; i++) {
 341                 if (GraphBuffer[i] > high)
 342                         high = GraphBuffer[i];
 343                 else if (GraphBuffer[i] < low)
 344                         low = GraphBuffer[i];
 345         }
 346
 347         i = 0;
 348         j = 0;
 349         minClk = 255;
 350         // get to first full low to prime loop and skip incomplete first pulse
 351         while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
 352                 ++i;
 353         while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
 354                 ++i;
 355         skip = i;
 356
 357         // populate tmpbuff buffer with pulse lengths
 358         while (i < GraphTraceLen) {
 359                 // measure from low to low
 360                 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
 361                         ++i;
 362                 start= i;
 363                 while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
 364                         ++i;
 365                 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
 366                         ++i;
 367                 if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
 368                         break;
 369                 }
 370                 tmpbuff[j++]= i - start;
 371                 if (i-start < minClk && i < GraphTraceLen) {
 372                         minClk = i - start;
 373                 }
 374         }
 375         // set clock
 376         if (!clk) {
 377                 for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
 378                         tol = fndClk[clkCnt]/8;
 379                         if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) {
 380                                 clk=fndClk[clkCnt];
 381                                 break;
 382                         }
 383                 }
 384                 if (!clk) return 0;
 385         } else tol = clk/8;
 386
 387         // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2)
 388         start = -1;
 389         for (i= 0; i < j - 4 ; ++i) {
 390                 skip += tmpbuff[i];
 391                 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)  //3 clocks
 392                         if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol)  //2 clocks
 393                                 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
 394                                         if (tmpbuff[i+3] >= clk-tol)  //1.5 to 2 clocks - depends on bit following
 395                                         {
 396                                                 start= i + 4;
 397                                                 break;
 398                                         }
 399         }
 400         startblock = i + 4;
 401
 402         // skip over the remainder of LW
 403         skip += tmpbuff[i+1] + tmpbuff[i+2] + clk;
 404         if (tmpbuff[i+3]>clk)
 405                 phaseoff = tmpbuff[i+3]-clk;
 406         else
 407                 phaseoff = 0;
 408         // now do it again to find the end
 409         end = skip;
 410         for (i += 3; i < j - 4 ; ++i) {
 411                 end += tmpbuff[i];
 412                 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)  //3 clocks
 413                         if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol)  //2 clocks
 414                                 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
 415                                         if (tmpbuff[i+3] >= clk-tol)  //1.5 to 2 clocks - depends on bit following
 416                                         {
 417                                                 complete= true;
 418                                                 break;
 419                                         }
 420         }
 421         end = i;
 422         // report back
 423         if (verbose || g_debugMode) {
 424                 if (start >= 0) {
 425                         PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)");
 426                 }       else {
 427                         PrintAndLog("No data found!, clock tried:%d",clk);
 428                         PrintAndLog("Try again with more samples.");
 429                         PrintAndLog("  or after a 'data askedge' command to clean up the read");
 430                         return 0;
 431                 }
 432         } else if (start < 0) return 0;
 433         start = skip;
 434         snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47);
 435         // get rid of leading crap
 436         snprintf(tmp, sizeof(tmp), "%i", skip);
 437         CmdLtrim(tmp);
 438         bool pTest;
 439         bool AllPTest = true;
 440         // now work through remaining buffer printing out data blocks
 441         block = 0;
 442         i = startblock;
 443         while (block < 6) {
 444                 if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block);
 445                 skip = phaseoff;
 446
 447                 // look for LW before start of next block
 448                 for ( ; i < j - 4 ; ++i) {
 449                         skip += tmpbuff[i];
 450                         if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)
 451                                 if (tmpbuff[i+1] >= clk-tol)
 452                                         break;
 453                 }
 454                 if (i >= j-4) break; //next LW not found
 455                 skip += clk;
 456                 if (tmpbuff[i+1]>clk)
 457                         phaseoff = tmpbuff[i+1]-clk;
 458                 else
 459                         phaseoff = 0;
 460                 i += 2;
 461                 if (ASKDemod(tmp2, false, false, 1) < 1) {
 462                         save_restoreGB(0);
 463                         return 0;
 464                 }
 465                 //set DemodBufferLen to just one block
 466                 DemodBufferLen = skip/clk;
 467                 //test parities
 468                 pTest = EM_ByteParityTest(DemodBuffer,DemodBufferLen,5,9,0);
 469                 pTest &= EM_EndParityTest(DemodBuffer,DemodBufferLen,5,9,0);
 470                 AllPTest &= pTest;
 471                 //get output
 472                 Code[block] = OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest);
 473                 if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d", skip, skip/clk);
 474                 //skip to start of next block
 475                 snprintf(tmp,sizeof(tmp),"%i",skip);
 476                 CmdLtrim(tmp);
 477                 block++;
 478                 if (i >= end) break; //in case chip doesn't output 6 blocks
 479         }
 480         //print full code:
 481         if (verbose || g_debugMode || AllPTest){
 482                 if (!complete) {
 483                         PrintAndLog("*** Warning!");
 484                         PrintAndLog("Partial data - no end found!");
 485                         PrintAndLog("Try again with more samples.");
 486                 }
 487                 PrintAndLog("Found data at sample: %i - using clock: %i", start, clk);
 488                 end = block;
 489                 for (block=0; block < end; block++){
 490                         PrintAndLog("Block %d: %08x",block,Code[block]);
 491                 }
 492                 if (AllPTest) {
 493                         PrintAndLog("Parities Passed");
 494                 } else {
 495                         PrintAndLog("Parities Failed");
 496                         PrintAndLog("Try cleaning the read samples with 'data askedge'");
 497                 }
 498         }
 499
 500         //restore GraphBuffer
 501         save_restoreGB(0);
 502         return (int)AllPTest;
 503 }
 504
 505 int CmdEM4x50Read(const char *Cmd)
 506 {
 507         return EM4x50Read(Cmd, true);
 508 }
 509
 510 int CmdReadWord(const char *Cmd)
 511 {
 512         int Word = -1; //default to invalid word
 513         UsbCommand c;
 514
 515         sscanf(Cmd, "%d", &Word);
 516
 517         if ( (Word > 15) | (Word < 0) ) {
 518                 PrintAndLog("Word must be between 0 and 15");
 519                 return 1;
 520         }
 521
 522         PrintAndLog("Reading word %d", Word);
 523
 524         c.cmd = CMD_EM4X_READ_WORD;
 525         c.d.asBytes[0] = 0x0; //Normal mode
 526         c.arg[0] = 0;
 527         c.arg[1] = Word;
 528         c.arg[2] = 0;
 529         SendCommand(&c);
 530         return 0;
 531 }
 532
 533 int CmdReadWordPWD(const char *Cmd)
 534 {
 535         int Word = -1; //default to invalid word
 536         int Password = 0xFFFFFFFF; //default to blank password
 537         UsbCommand c;
 538
 539         sscanf(Cmd, "%d %x", &Word, &Password);
 540
 541         if ( (Word > 15) | (Word < 0) ) {
 542                 PrintAndLog("Word must be between 0 and 15");
 543                 return 1;
 544         }
 545
 546         PrintAndLog("Reading word %d with password %08X", Word, Password);
 547
 548         c.cmd = CMD_EM4X_READ_WORD;
 549         c.d.asBytes[0] = 0x1; //Password mode
 550         c.arg[0] = 0;
 551         c.arg[1] = Word;
 552         c.arg[2] = Password;
 553         SendCommand(&c);
 554         return 0;
 555 }
 556
 557 int CmdWriteWord(const char *Cmd)
 558 {
 559         int Word = 16; //default to invalid block
 560         int Data = 0xFFFFFFFF; //default to blank data
 561         UsbCommand c;
 562
 563         sscanf(Cmd, "%x %d", &Data, &Word);
 564
 565         if (Word > 15) {
 566                 PrintAndLog("Word must be between 0 and 15");
 567                 return 1;
 568         }
 569
 570         PrintAndLog("Writing word %d with data %08X", Word, Data);
 571
 572         c.cmd = CMD_EM4X_WRITE_WORD;
 573         c.d.asBytes[0] = 0x0; //Normal mode
 574         c.arg[0] = Data;
 575         c.arg[1] = Word;
 576         c.arg[2] = 0;
 577         SendCommand(&c);
 578         return 0;
 579 }
 580
 581 int CmdWriteWordPWD(const char *Cmd)
 582 {
 583         int Word = 16; //default to invalid word
 584         int Data = 0xFFFFFFFF; //default to blank data
 585         int Password = 0xFFFFFFFF; //default to blank password
 586         UsbCommand c;
 587
 588         sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
 589
 590         if (Word > 15) {
 591                 PrintAndLog("Word must be between 0 and 15");
 592                 return 1;
 593         }
 594
 595         PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);
 596
 597         c.cmd = CMD_EM4X_WRITE_WORD;
 598         c.d.asBytes[0] = 0x1; //Password mode
 599         c.arg[0] = Data;
 600         c.arg[1] = Word;
 601         c.arg[2] = Password;
 602         SendCommand(&c);
 603         return 0;
 604 }
 605
 606 static command_t CommandTable[] =
 607 {
 608         {"help", CmdHelp, 1, "This help"},
 609         {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
 610         {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"},
 611         {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
 612         {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
 613         {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
 614         {"em410xwrite", CmdEM410xWrite, 0, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
 615         {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
 616         {"readword", CmdReadWord, 1, "<Word> -- Read EM4xxx word data"},
 617         {"readwordPWD", CmdReadWordPWD, 1, "<Word> <Password> -- Read EM4xxx word data in password mode"},
 618         {"writeword", CmdWriteWord, 1, "<Data> <Word> -- Write EM4xxx word data"},
 619         {"writewordPWD", CmdWriteWordPWD, 1, "<Data> <Word> <Password> -- Write EM4xxx word data in password mode"},
 620         {NULL, NULL, 0, NULL}
 621 };
 622
 623 int CmdLFEM4X(const char *Cmd)
 624 {
 625         CmdsParse(CommandTable, Cmd);
 626         return 0;
 627 }
 628
 629 int CmdHelp(const char *Cmd)
 630 {
 631         CmdsHelp(CommandTable);
 632         return 0;
 633 }