cvs.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlf.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 commands
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <limits.h>
  15 #include "proxmark3.h"
  16 #include "data.h"
  17 #include "graph.h"
  18 #include "ui.h"
  19 #include "cmdparser.h"
  20 #include "cmdmain.h"
  21 #include "cmddata.h"
  22 #include "cmdlf.h"
  23 #include "cmdlfawid26.h"
  24 #include "cmdlfhid.h"
  25 #include "cmdlfti.h"
  26 #include "cmdlfem4x.h"
  27 #include "cmdlfhitag.h"
  28 #include "cmdlft55xx.h"
  29 #include "cmdlfpcf7931.h"
  30 #include "cmdlfio.h"
  31
  32 static int CmdHelp(const char *Cmd);
  33
  34 /* send a command before reading */
  35 int CmdLFCommandRead(const char *Cmd)
  36 {
  37   static char dummy[3];
  38
  39   dummy[0]= ' ';
  40
  41   UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
  42   sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char*)(&c.d.asBytes),(char*)(&dummy+1));
  43   // in case they specified 'h'
  44   strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
  45   SendCommand(&c);
  46   return 0;
  47 }
  48
  49 int CmdFlexdemod(const char *Cmd)
  50 {
  51   int i;
  52   for (i = 0; i < GraphTraceLen; ++i) {
  53     if (GraphBuffer[i] < 0) {
  54       GraphBuffer[i] = -1;
  55     } else {
  56       GraphBuffer[i] = 1;
  57     }
  58   }
  59
  60 #define LONG_WAIT 100
  61   int start;
  62   for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
  63     int first = GraphBuffer[start];
  64     for (i = start; i < start + LONG_WAIT; i++) {
  65       if (GraphBuffer[i] != first) {
  66         break;
  67       }
  68     }
  69     if (i == (start + LONG_WAIT)) {
  70       break;
  71     }
  72   }
  73   if (start == GraphTraceLen - LONG_WAIT) {
  74     PrintAndLog("nothing to wait for");
  75     return 0;
  76   }
  77
  78   GraphBuffer[start] = 2;
  79   GraphBuffer[start+1] = -2;
  80
  81   uint8_t bits[64];
  82
  83   int bit;
  84   i = start;
  85   for (bit = 0; bit < 64; bit++) {
  86     int j;
  87     int sum = 0;
  88     for (j = 0; j < 16; j++) {
  89       sum += GraphBuffer[i++];
  90     }
  91     if (sum > 0) {
  92       bits[bit] = 1;
  93     } else {
  94       bits[bit] = 0;
  95     }
  96     PrintAndLog("bit %d sum %d", bit, sum);
  97   }
  98
  99   for (bit = 0; bit < 64; bit++) {
 100     int j;
 101     int sum = 0;
 102     for (j = 0; j < 16; j++) {
 103       sum += GraphBuffer[i++];
 104     }
 105     if (sum > 0 && bits[bit] != 1) {
 106       PrintAndLog("oops1 at %d", bit);
 107     }
 108     if (sum < 0 && bits[bit] != 0) {
 109       PrintAndLog("oops2 at %d", bit);
 110     }
 111   }
 112
 113   GraphTraceLen = 32*64;
 114   i = 0;
 115   int phase = 0;
 116   for (bit = 0; bit < 64; bit++) {
 117     if (bits[bit] == 0) {
 118       phase = 0;
 119     } else {
 120       phase = 1;
 121     }
 122     int j;
 123     for (j = 0; j < 32; j++) {
 124       GraphBuffer[i++] = phase;
 125       phase = !phase;
 126     }
 127   }
 128
 129   RepaintGraphWindow();
 130   return 0;
 131 }
 132
 133 int CmdIndalaDemod(const char *Cmd)
 134 {
 135   // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
 136
 137   int state = -1;
 138   int count = 0;
 139   int i, j;
 140   // worst case with GraphTraceLen=64000 is < 4096
 141   // under normal conditions it's < 2048
 142   uint8_t rawbits[4096];
 143   int rawbit = 0;
 144   int worst = 0, worstPos = 0;
 145   PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
 146   for (i = 0; i < GraphTraceLen-1; i += 2) {
 147     count += 1;
 148     if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
 149       if (state == 0) {
 150         for (j = 0; j <  count - 8; j += 16) {
 151           rawbits[rawbit++] = 0;
 152         }
 153         if ((abs(count - j)) > worst) {
 154           worst = abs(count - j);
 155           worstPos = i;
 156         }
 157       }
 158       state = 1;
 159       count = 0;
 160     } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
 161       if (state == 1) {
 162         for (j = 0; j <  count - 8; j += 16) {
 163           rawbits[rawbit++] = 1;
 164         }
 165         if ((abs(count - j)) > worst) {
 166           worst = abs(count - j);
 167           worstPos = i;
 168         }
 169       }
 170       state = 0;
 171       count = 0;
 172     }
 173   }
 174   if (rawbit>0){
 175     PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
 176   PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
 177   } else return 0;
 178   // Finding the start of a UID
 179   int uidlen, long_wait;
 180   if (strcmp(Cmd, "224") == 0) {
 181     uidlen = 224;
 182     long_wait = 30;
 183   } else {
 184     uidlen = 64;
 185     long_wait = 29;
 186   }
 187   int start;
 188   int first = 0;
 189   for (start = 0; start <= rawbit - uidlen; start++) {
 190     first = rawbits[start];
 191     for (i = start; i < start + long_wait; i++) {
 192       if (rawbits[i] != first) {
 193         break;
 194       }
 195     }
 196     if (i == (start + long_wait)) {
 197       break;
 198     }
 199   }
 200   if (start == rawbit - uidlen + 1) {
 201     PrintAndLog("nothing to wait for");
 202     return 0;
 203   }
 204
 205   // Inverting signal if needed
 206   if (first == 1) {
 207     for (i = start; i < rawbit; i++) {
 208       rawbits[i] = !rawbits[i];
 209     }
 210   }
 211
 212   // Dumping UID
 213   uint8_t bits[224];
 214   char showbits[225];
 215   showbits[uidlen]='\0';
 216   int bit;
 217   i = start;
 218   int times = 0;
 219   if (uidlen > rawbit) {
 220     PrintAndLog("Warning: not enough raw bits to get a full UID");
 221     for (bit = 0; bit < rawbit; bit++) {
 222       bits[bit] = rawbits[i++];
 223       // As we cannot know the parity, let's use "." and "/"
 224       showbits[bit] = '.' + bits[bit];
 225     }
 226     showbits[bit+1]='\0';
 227     PrintAndLog("Partial UID=%s", showbits);
 228     return 0;
 229   } else {
 230     for (bit = 0; bit < uidlen; bit++) {
 231       bits[bit] = rawbits[i++];
 232       showbits[bit] = '0' + bits[bit];
 233     }
 234     times = 1;
 235   }
 236
 237   //convert UID to HEX
 238   uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 239   int idx;
 240   uid1=0;
 241   uid2=0;
 242   if (uidlen==64){
 243     for( idx=0; idx<64; idx++) {
 244         if (showbits[idx] == '0') {
 245         uid1=(uid1<<1)|(uid2>>31);
 246         uid2=(uid2<<1)|0;
 247         } else {
 248         uid1=(uid1<<1)|(uid2>>31);
 249         uid2=(uid2<<1)|1;
 250         }
 251       }
 252     PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
 253   }
 254   else {
 255     uid3=0;
 256     uid4=0;
 257     uid5=0;
 258     uid6=0;
 259     uid7=0;
 260     for( idx=0; idx<224; idx++) {
 261         uid1=(uid1<<1)|(uid2>>31);
 262         uid2=(uid2<<1)|(uid3>>31);
 263         uid3=(uid3<<1)|(uid4>>31);
 264         uid4=(uid4<<1)|(uid5>>31);
 265         uid5=(uid5<<1)|(uid6>>31);
 266         uid6=(uid6<<1)|(uid7>>31);
 267         if (showbits[idx] == '0') uid7=(uid7<<1)|0;
 268         else uid7=(uid7<<1)|1;
 269       }
 270     PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 271   }
 272
 273   // Checking UID against next occurrences
 274   for (; i + uidlen <= rawbit;) {
 275     int failed = 0;
 276     for (bit = 0; bit < uidlen; bit++) {
 277       if (bits[bit] != rawbits[i++]) {
 278         failed = 1;
 279         break;
 280       }
 281     }
 282     if (failed == 1) {
 283       break;
 284     }
 285     times += 1;
 286   }
 287   PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
 288
 289   // Remodulating for tag cloning
 290   GraphTraceLen = 32*uidlen;
 291   i = 0;
 292   int phase = 0;
 293   for (bit = 0; bit < uidlen; bit++) {
 294     if (bits[bit] == 0) {
 295       phase = 0;
 296     } else {
 297       phase = 1;
 298     }
 299     int j;
 300     for (j = 0; j < 32; j++) {
 301       GraphBuffer[i++] = phase;
 302       phase = !phase;
 303     }
 304   }
 305
 306   RepaintGraphWindow();
 307   return 1;
 308 }
 309
 310 int CmdIndalaClone(const char *Cmd)
 311 {
 312   unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 313   UsbCommand c;
 314   uid1=0;
 315   uid2=0;
 316   uid3=0;
 317   uid4=0;
 318   uid5=0;
 319   uid6=0;
 320   uid7=0;
 321   int n = 0, i = 0;
 322
 323   if (strchr(Cmd,'l') != 0) {
 324     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 325       uid1 = (uid1 << 4) | (uid2 >> 28);
 326       uid2 = (uid2 << 4) | (uid3 >> 28);
 327       uid3 = (uid3 << 4) | (uid4 >> 28);
 328       uid4 = (uid4 << 4) | (uid5 >> 28);
 329       uid5 = (uid5 << 4) | (uid6 >> 28);
 330       uid6 = (uid6 << 4) | (uid7 >> 28);
 331         uid7 = (uid7 << 4) | (n & 0xf);
 332     }
 333     PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 334     c.cmd = CMD_INDALA_CLONE_TAG_L;
 335     c.d.asDwords[0] = uid1;
 336     c.d.asDwords[1] = uid2;
 337     c.d.asDwords[2] = uid3;
 338     c.d.asDwords[3] = uid4;
 339     c.d.asDwords[4] = uid5;
 340     c.d.asDwords[5] = uid6;
 341     c.d.asDwords[6] = uid7;
 342   }
 343   else
 344   {
 345     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 346       uid1 = (uid1 << 4) | (uid2 >> 28);
 347       uid2 = (uid2 << 4) | (n & 0xf);
 348     }
 349     PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
 350     c.cmd = CMD_INDALA_CLONE_TAG;
 351     c.arg[0] = uid1;
 352     c.arg[1] = uid2;
 353   }
 354
 355   SendCommand(&c);
 356   return 0;
 357 }
 358
 359 int CmdLFRead(const char *Cmd)
 360 {
 361   UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K};
 362   // 'h' means higher-low-frequency, 134 kHz
 363   if(*Cmd == 'h') {
 364     c.arg[0] = 1;
 365   } else if (*Cmd == '\0') {
 366     c.arg[0] = 0;
 367   } else if (sscanf(Cmd, "%"lli, &c.arg[0]) != 1) {
 368     PrintAndLog("Samples 1: 'lf read'");
 369         PrintAndLog("        2: 'lf read h'");
 370         PrintAndLog("        3: 'lf read <divisor>'");
 371     return 0;
 372   }
 373   SendCommand(&c);
 374   WaitForResponse(CMD_ACK,NULL);
 375
 376   // load samples
 377   CmdSamples("");
 378   // show plot
 379   ShowGraphWindow();
 380   return 0;
 381 }
 382
 383 static void ChkBitstream(const char *str)
 384 {
 385   int i;
 386
 387   /* convert to bitstream if necessary */
 388   for (i = 0; i < (int)(GraphTraceLen / 2); i++)
 389   {
 390     if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0)
 391     {
 392       CmdBitstream(str);
 393       break;
 394     }
 395   }
 396 }
 397
 398 int CmdLFSim(const char *Cmd)
 399 {
 400   int i,j;
 401
 402   static int gap;
 403
 404   sscanf(Cmd, "%i", &gap);
 405
 406   /* convert to bitstream if necessary */
 407   ChkBitstream(Cmd);
 408
 409   printf("Sending [%d bytes]", GraphTraceLen);
 410   for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
 411     UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 412
 413     for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
 414       c.d.asBytes[j] = GraphBuffer[i+j];
 415     }
 416     SendCommand(&c);
 417     WaitForResponse(CMD_ACK,NULL);
 418         printf(".");
 419   }
 420   printf("\n");
 421   PrintAndLog("Starting to simulate");
 422   UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 423   SendCommand(&c);
 424   return 0;
 425 }
 426
 427 int CmdLFSimBidir(const char *Cmd)
 428 {
 429   /* Set ADC to twice the carrier for a slight supersampling */
 430   UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
 431   SendCommand(&c);
 432   return 0;
 433 }
 434
 435 /* simulate an LF Manchester encoded tag with specified bitstream, clock rate and inter-id gap */
 436 int CmdLFSimManchester(const char *Cmd)
 437 {
 438   static int clock, gap;
 439   static char data[1024], gapstring[8];
 440
 441   /* get settings/bits */
 442   sscanf(Cmd, "%i %s %i", &clock, &data[0], &gap);
 443
 444   /* clear our graph */
 445   ClearGraph(0);
 446
 447   /* fill it with our bitstream */
 448   for (int i = 0; i < strlen(data) ; ++i)
 449     AppendGraph(0, clock, data[i]- '0');
 450
 451   /* modulate */
 452   CmdManchesterMod("");
 453
 454   /* show what we've done */
 455   RepaintGraphWindow();
 456
 457   /* simulate */
 458   sprintf(&gapstring[0], "%i", gap);
 459   CmdLFSim(gapstring);
 460   return 0;
 461 }
 462
 463 int CmdLFSnoop(const char *Cmd)
 464 {
 465         UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
 466
 467         // 'h' means higher-low-frequency, 134 kHz
 468         c.arg[0] = 0;
 469         c.arg[1] = -1;
 470
 471         if (*Cmd == 'l') {
 472                 sscanf(Cmd, "l %"lli, &c.arg[1]);
 473         } else if (*Cmd == 'h') {
 474                 c.arg[0] = 1;
 475                 sscanf(Cmd, "h %"lli, &c.arg[1]);
 476         } else if (sscanf(Cmd, "%"lli" %"lli, &c.arg[0], &c.arg[1]) < 1) {
 477                 PrintAndLog("use 'snoop' or 'snoop {l,h} [trigger threshold]', or 'snoop <divisor> [trigger threshold]'");
 478                 return 0;
 479         }
 480
 481         SendCommand(&c);
 482         WaitForResponse(CMD_ACK,NULL);
 483
 484         size_t BUFF_SIZE = 8000;
 485         uint8_t data[BUFF_SIZE];
 486
 487         GetFromBigBuf(data,BUFF_SIZE,0);  //3560 -- should be offset..
 488         WaitForResponseTimeout(CMD_ACK,NULL, 1500);
 489
 490         for (int j = 0; j < BUFF_SIZE; j++) {
 491                 GraphBuffer[j] = ((int)data[j]);
 492         }
 493
 494         GraphTraceLen = BUFF_SIZE;
 495
 496         return 0;
 497 }
 498
 499 int CmdVchDemod(const char *Cmd)
 500 {
 501   // Is this the entire sync pattern, or does this also include some
 502   // data bits that happen to be the same everywhere? That would be
 503   // lovely to know.
 504   static const int SyncPattern[] = {
 505     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 506     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 507     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 508     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 509     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 510     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 511     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 512     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 513     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 514     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 515   };
 516
 517   // So first, we correlate for the sync pattern, and mark that.
 518   int bestCorrel = 0, bestPos = 0;
 519   int i;
 520   // It does us no good to find the sync pattern, with fewer than
 521   // 2048 samples after it...
 522   for (i = 0; i < (GraphTraceLen-2048); i++) {
 523     int sum = 0;
 524     int j;
 525     for (j = 0; j < arraylen(SyncPattern); j++) {
 526       sum += GraphBuffer[i+j]*SyncPattern[j];
 527     }
 528     if (sum > bestCorrel) {
 529       bestCorrel = sum;
 530       bestPos = i;
 531     }
 532   }
 533   PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
 534
 535   char bits[257];
 536   bits[256] = '\0';
 537
 538   int worst = INT_MAX;
 539   int worstPos = 0;
 540
 541   for (i = 0; i < 2048; i += 8) {
 542     int sum = 0;
 543     int j;
 544     for (j = 0; j < 8; j++) {
 545       sum += GraphBuffer[bestPos+i+j];
 546     }
 547     if (sum < 0) {
 548       bits[i/8] = '.';
 549     } else {
 550       bits[i/8] = '1';
 551     }
 552     if(abs(sum) < worst) {
 553       worst = abs(sum);
 554       worstPos = i;
 555     }
 556   }
 557   PrintAndLog("bits:");
 558   PrintAndLog("%s", bits);
 559   PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
 560
 561   if (strcmp(Cmd, "clone")==0) {
 562     GraphTraceLen = 0;
 563     char *s;
 564     for(s = bits; *s; s++) {
 565       int j;
 566       for(j = 0; j < 16; j++) {
 567         GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
 568       }
 569     }
 570     RepaintGraphWindow();
 571   }
 572   return 0;
 573 }
 574
 575 //by marshmellow
 576 int CmdLFfind(const char *Cmd)
 577 {
 578         int ans = 0;
 579         char cmdp = param_getchar(Cmd, 0);
 580
 581         if (strlen(Cmd) > 1 || cmdp == 'h' || cmdp == 'H') {
 582                 PrintAndLog("Usage:  lf search <0|1>");
 583                 PrintAndLog("     <use data from Graphbuffer>, if not set, try reading data from tag.");
 584                 PrintAndLog("");
 585                 PrintAndLog("    sample: lf search");
 586                 PrintAndLog("          : lf search 1");
 587                 return 0;
 588         }
 589
 590         if (!offline || (cmdp != '1') ){
 591                 ans = CmdLFRead("");
 592         } else if (GraphTraceLen < 1000) {
 593                 PrintAndLog("Data in Graphbuffer was too small.");
 594                 return 0;
 595         }
 596
 597         PrintAndLog("Checking for known tags:");
 598
 599         ans=Cmdaskmandemod("");
 600         PrintAndLog("ASK_MAN: %s", (ans)?"YES":"NO" );
 601
 602         ans=CmdFSKdemodHID("");
 603         PrintAndLog("HID: %s", (ans)?"YES":"NO" );
 604
 605         ans=CmdFSKdemodIO("");
 606         PrintAndLog("IO prox: %s", (ans)?"YES":"NO" );
 607
 608         ans=CmdIndalaDemod("");
 609         PrintAndLog("Indala (64): %s", (ans)?"YES":"NO" );
 610
 611         ans=CmdIndalaDemod("224");
 612         PrintAndLog("Indala (224): %s", (ans)?"YES":"NO" );
 613
 614         if (!ans)
 615                 PrintAndLog("No Known Tags Found!\n");
 616
 617         return 0;
 618 }
 619
 620 static command_t CommandTable[] =
 621 {
 622   {"help",        CmdHelp,            1, "This help"},
 623   {"cmdread",     CmdLFCommandRead,   0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"},
 624
 625   {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
 626   {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
 627   {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (UID in HEX)(option 'l' for 224 UID"},
 628   {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
 629
 630
 631   {"read",        CmdLFRead,          0, "['h' or <divisor>] -- Read 125/134 kHz LF ID-only tag (option 'h' for 134, alternatively: f=12MHz/(divisor+1))"},
 632   {"search",      CmdLFfind,          1, "Read and Search for valid known tag (in offline mode it you can load first then search)"},
 633   {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
 634   {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
 635   {"simman",      CmdLFSimManchester, 0, "<Clock> <Bitstream> [GAP] Simulate arbitrary Manchester LF tag"},
 636   {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
 637
 638   {"awid26",        CmdLFAWID26,        1, "{ AWID26 tags }"},
 639   {"em4x",        CmdLFEM4X,          1, "{ EM4X tags }"},
 640   {"hid",         CmdLFHID,           1, "{ HID tags }"},
 641   {"hitag",       CmdLFHitag,         1, "{ Hitag tags and transponders }"},
 642   {"io",          CmdLFIO,                1, "{ ioProx tags }"},
 643   {"pcf7931",     CmdLFPCF7931,       1, "{ PCF7931 tags }"},
 644   {"ti",          CmdLFTI,            1, "{ TI tags }"},
 645   {"t55xx",       CmdLFT55XX,         1, "{ T55xx tags }"},
 646
 647   {NULL, NULL, 0, NULL}
 648 };
 649
 650 int CmdLF(const char *Cmd)
 651 {
 652   CmdsParse(CommandTable, Cmd);
 653   return 0;
 654 }
 655
 656 int CmdHelp(const char *Cmd)
 657 {
 658   CmdsHelp(CommandTable);
 659   return 0;
 660 }