git.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 "util.h"
  23 #include "cmdlf.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 #include "lfdemod.h"
  32
  33 static int CmdHelp(const char *Cmd);
  34
  35 /* send a command before reading */
  36 int CmdLFCommandRead(const char *Cmd)
  37 {
  38   static char dummy[3];
  39
  40   dummy[0]= ' ';
  41
  42   UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
  43   sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char*)(&c.d.asBytes),(char*)(&dummy+1));
  44   // in case they specified 'h'
  45   strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
  46   SendCommand(&c);
  47   return 0;
  48 }
  49
  50 int CmdFlexdemod(const char *Cmd)
  51 {
  52   int i;
  53   for (i = 0; i < GraphTraceLen; ++i) {
  54     if (GraphBuffer[i] < 0) {
  55       GraphBuffer[i] = -1;
  56     } else {
  57       GraphBuffer[i] = 1;
  58     }
  59   }
  60
  61 #define LONG_WAIT 100
  62   int start;
  63   for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
  64     int first = GraphBuffer[start];
  65     for (i = start; i < start + LONG_WAIT; i++) {
  66       if (GraphBuffer[i] != first) {
  67         break;
  68       }
  69     }
  70     if (i == (start + LONG_WAIT)) {
  71       break;
  72     }
  73   }
  74   if (start == GraphTraceLen - LONG_WAIT) {
  75     PrintAndLog("nothing to wait for");
  76     return 0;
  77   }
  78
  79   GraphBuffer[start] = 2;
  80   GraphBuffer[start+1] = -2;
  81         uint8_t bits[64] = {0x00};
  82
  83         int bit, sum;
  84   i = start;
  85   for (bit = 0; bit < 64; bit++) {
  86                 sum = 0;
  87                 for (int j = 0; j < 16; j++) {
  88       sum += GraphBuffer[i++];
  89     }
  90
  91                 bits[bit] = (sum > 0) ? 1 : 0;
  92
  93     PrintAndLog("bit %d sum %d", bit, sum);
  94   }
  95
  96   for (bit = 0; bit < 64; bit++) {
  97     int j;
  98     int sum = 0;
  99     for (j = 0; j < 16; j++) {
 100       sum += GraphBuffer[i++];
 101     }
 102     if (sum > 0 && bits[bit] != 1) {
 103       PrintAndLog("oops1 at %d", bit);
 104     }
 105     if (sum < 0 && bits[bit] != 0) {
 106       PrintAndLog("oops2 at %d", bit);
 107     }
 108   }
 109
 110         // HACK writing back to graphbuffer.
 111   GraphTraceLen = 32*64;
 112   i = 0;
 113   int phase = 0;
 114   for (bit = 0; bit < 64; bit++) {
 115
 116                 phase = (bits[bit] == 0) ? 0 : 1;
 117
 118     int j;
 119     for (j = 0; j < 32; j++) {
 120       GraphBuffer[i++] = phase;
 121       phase = !phase;
 122     }
 123   }
 124
 125   RepaintGraphWindow();
 126   return 0;
 127 }
 128
 129 int CmdIndalaDemod(const char *Cmd)
 130 {
 131   // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
 132
 133   int state = -1;
 134   int count = 0;
 135   int i, j;
 136
 137   // worst case with GraphTraceLen=64000 is < 4096
 138   // under normal conditions it's < 2048
 139
 140   uint8_t rawbits[4096];
 141   int rawbit = 0;
 142   int worst = 0, worstPos = 0;
 143  // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
 144   for (i = 0; i < GraphTraceLen-1; i += 2) {
 145     count += 1;
 146     if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
 147       if (state == 0) {
 148         for (j = 0; j <  count - 8; j += 16) {
 149           rawbits[rawbit++] = 0;
 150         }
 151         if ((abs(count - j)) > worst) {
 152           worst = abs(count - j);
 153           worstPos = i;
 154         }
 155       }
 156       state = 1;
 157       count = 0;
 158     } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
 159       if (state == 1) {
 160         for (j = 0; j <  count - 8; j += 16) {
 161           rawbits[rawbit++] = 1;
 162         }
 163         if ((abs(count - j)) > worst) {
 164           worst = abs(count - j);
 165           worstPos = i;
 166         }
 167       }
 168       state = 0;
 169       count = 0;
 170     }
 171   }
 172
 173   if (rawbit>0){
 174     PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
 175     PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
 176         } else {
 177                 return 0;
 178         }
 179
 180   // Finding the start of a UID
 181   int uidlen, long_wait;
 182   if (strcmp(Cmd, "224") == 0) {
 183     uidlen = 224;
 184     long_wait = 30;
 185   } else {
 186     uidlen = 64;
 187     long_wait = 29;
 188   }
 189
 190   int start;
 191   int first = 0;
 192   for (start = 0; start <= rawbit - uidlen; start++) {
 193     first = rawbits[start];
 194     for (i = start; i < start + long_wait; i++) {
 195       if (rawbits[i] != first) {
 196         break;
 197       }
 198     }
 199     if (i == (start + long_wait)) {
 200       break;
 201     }
 202   }
 203
 204   if (start == rawbit - uidlen + 1) {
 205     PrintAndLog("nothing to wait for");
 206     return 0;
 207   }
 208
 209   // Inverting signal if needed
 210   if (first == 1) {
 211     for (i = start; i < rawbit; i++) {
 212       rawbits[i] = !rawbits[i];
 213     }
 214   }
 215
 216   // Dumping UID
 217         uint8_t bits[224] = {0x00};
 218         char showbits[225] = {0x00};
 219   int bit;
 220   i = start;
 221   int times = 0;
 222
 223   if (uidlen > rawbit) {
 224     PrintAndLog("Warning: not enough raw bits to get a full UID");
 225     for (bit = 0; bit < rawbit; bit++) {
 226       bits[bit] = rawbits[i++];
 227       // As we cannot know the parity, let's use "." and "/"
 228       showbits[bit] = '.' + bits[bit];
 229     }
 230     showbits[bit+1]='\0';
 231     PrintAndLog("Partial UID=%s", showbits);
 232     return 0;
 233   } else {
 234     for (bit = 0; bit < uidlen; bit++) {
 235       bits[bit] = rawbits[i++];
 236       showbits[bit] = '0' + bits[bit];
 237     }
 238     times = 1;
 239   }
 240
 241   //convert UID to HEX
 242   uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 243   int idx;
 244         uid1 = uid2 = 0;
 245
 246   if (uidlen==64){
 247     for( idx=0; idx<64; idx++) {
 248         if (showbits[idx] == '0') {
 249         uid1=(uid1<<1)|(uid2>>31);
 250         uid2=(uid2<<1)|0;
 251         } else {
 252         uid1=(uid1<<1)|(uid2>>31);
 253         uid2=(uid2<<1)|1;
 254         }
 255       }
 256     PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
 257   }
 258   else {
 259                 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
 260
 261     for( idx=0; idx<224; idx++) {
 262         uid1=(uid1<<1)|(uid2>>31);
 263         uid2=(uid2<<1)|(uid3>>31);
 264         uid3=(uid3<<1)|(uid4>>31);
 265         uid4=(uid4<<1)|(uid5>>31);
 266         uid5=(uid5<<1)|(uid6>>31);
 267         uid6=(uid6<<1)|(uid7>>31);
 268
 269                         if (showbits[idx] == '0')
 270                                 uid7 = (uid7<<1) | 0;
 271                         else
 272                                 uid7 = (uid7<<1) | 1;
 273       }
 274     PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 275   }
 276
 277   // Checking UID against next occurrences
 278     int failed = 0;
 279         for (; i + uidlen <= rawbit;) {
 280                 failed = 0;
 281     for (bit = 0; bit < uidlen; bit++) {
 282       if (bits[bit] != rawbits[i++]) {
 283         failed = 1;
 284         break;
 285       }
 286     }
 287     if (failed == 1) {
 288       break;
 289     }
 290     times += 1;
 291   }
 292
 293   PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
 294
 295   // Remodulating for tag cloning
 296         // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
 297         // since this changes graphbuffer data.
 298   GraphTraceLen = 32*uidlen;
 299   i = 0;
 300   int phase = 0;
 301   for (bit = 0; bit < uidlen; bit++) {
 302     if (bits[bit] == 0) {
 303       phase = 0;
 304     } else {
 305       phase = 1;
 306     }
 307     int j;
 308     for (j = 0; j < 32; j++) {
 309       GraphBuffer[i++] = phase;
 310       phase = !phase;
 311     }
 312   }
 313
 314   RepaintGraphWindow();
 315   return 1;
 316 }
 317
 318 int CmdIndalaClone(const char *Cmd)
 319 {
 320   UsbCommand c;
 321         unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 322
 323         uid1 =  uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
 324   int n = 0, i = 0;
 325
 326   if (strchr(Cmd,'l') != 0) {
 327     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 328       uid1 = (uid1 << 4) | (uid2 >> 28);
 329       uid2 = (uid2 << 4) | (uid3 >> 28);
 330       uid3 = (uid3 << 4) | (uid4 >> 28);
 331       uid4 = (uid4 << 4) | (uid5 >> 28);
 332       uid5 = (uid5 << 4) | (uid6 >> 28);
 333       uid6 = (uid6 << 4) | (uid7 >> 28);
 334         uid7 = (uid7 << 4) | (n & 0xf);
 335     }
 336     PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 337     c.cmd = CMD_INDALA_CLONE_TAG_L;
 338     c.d.asDwords[0] = uid1;
 339     c.d.asDwords[1] = uid2;
 340     c.d.asDwords[2] = uid3;
 341     c.d.asDwords[3] = uid4;
 342     c.d.asDwords[4] = uid5;
 343     c.d.asDwords[5] = uid6;
 344     c.d.asDwords[6] = uid7;
 345         } else {
 346     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 347       uid1 = (uid1 << 4) | (uid2 >> 28);
 348       uid2 = (uid2 << 4) | (n & 0xf);
 349     }
 350     PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
 351     c.cmd = CMD_INDALA_CLONE_TAG;
 352     c.arg[0] = uid1;
 353     c.arg[1] = uid2;
 354   }
 355
 356   SendCommand(&c);
 357   return 0;
 358 }
 359
 360 int usage_lf_read()
 361 {
 362         PrintAndLog("Usage: lf read");
 363         PrintAndLog("Options:        ");
 364         PrintAndLog("       h            This help");
 365         PrintAndLog("       s            silent run no printout");
 366         PrintAndLog("This function takes no arguments. ");
 367         PrintAndLog("Use 'lf config' to set parameters.");
 368         return 0;
 369 }
 370 int usage_lf_snoop()
 371 {
 372         PrintAndLog("Usage: lf snoop");
 373         PrintAndLog("Options:        ");
 374         PrintAndLog("       h            This help");
 375         PrintAndLog("This function takes no arguments. ");
 376         PrintAndLog("Use 'lf config' to set parameters.");
 377         return 0;
 378 }
 379
 380 int usage_lf_config()
 381 {
 382         PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
 383         PrintAndLog("Options:        ");
 384         PrintAndLog("       h             This help");
 385         PrintAndLog("       L             Low frequency (125 KHz)");
 386         PrintAndLog("       H             High frequency (134 KHz)");
 387         PrintAndLog("       q <divisor>   Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
 388         PrintAndLog("       b <bps>       Sets resolution of bits per sample. Default (max): 8");
 389         PrintAndLog("       d <decim>     Sets decimation. A value of N saves only 1 in N samples. Default: 1");
 390         PrintAndLog("       a [0|1]       Averaging - if set, will average the stored sample value when decimating. Default: 1");
 391         PrintAndLog("       t <threshold> Sets trigger threshold. 0 means no threshold");
 392         PrintAndLog("Examples:");
 393         PrintAndLog("      lf config b 8 L");
 394         PrintAndLog("                    Samples at 125KHz, 8bps.");
 395         PrintAndLog("      lf config H b 4 d 3");
 396         PrintAndLog("                    Samples at 134KHz, averages three samples into one, stored with ");
 397         PrintAndLog("                    a resolution of 4 bits per sample.");
 398         PrintAndLog("      lf read");
 399         PrintAndLog("                    Performs a read (active field)");
 400         PrintAndLog("      lf snoop");
 401         PrintAndLog("                    Performs a snoop (no active field)");
 402         return 0;
 403 }
 404
 405 int CmdLFSetConfig(const char *Cmd)
 406 {
 407
 408         uint8_t divisor =  0;//Frequency divisor
 409         uint8_t bps = 0; // Bits per sample
 410         uint8_t decimation = 0; //How many to keep
 411         bool averaging = 1; // Defaults to true
 412         bool errors = FALSE;
 413         int trigger_threshold =-1;//Means no change
 414         uint8_t unsigned_trigg = 0;
 415
 416         uint8_t cmdp =0;
 417         while(param_getchar(Cmd, cmdp) != 0x00)
 418         {
 419                 switch(param_getchar(Cmd, cmdp))
 420                 {
 421                 case 'h':
 422                         return usage_lf_config();
 423                 case 'H':
 424                         divisor = 88;
 425                         cmdp++;
 426                         break;
 427                 case 'L':
 428                         divisor = 95;
 429                         cmdp++;
 430                         break;
 431                 case 'q':
 432                         errors |= param_getdec(Cmd,cmdp+1,&divisor);
 433                         cmdp+=2;
 434                         break;
 435                 case 't':
 436                         errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
 437                         cmdp+=2;
 438                         if(!errors) trigger_threshold = unsigned_trigg;
 439                         break;
 440                 case 'b':
 441                         errors |= param_getdec(Cmd,cmdp+1,&bps);
 442                         cmdp+=2;
 443                         break;
 444                 case 'd':
 445                         errors |= param_getdec(Cmd,cmdp+1,&decimation);
 446                         cmdp+=2;
 447                         break;
 448                 case 'a':
 449                         averaging = param_getchar(Cmd,cmdp+1) == '1';
 450                         cmdp+=2;
 451                         break;
 452                 default:
 453                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 454                         errors = 1;
 455                         break;
 456                 }
 457                 if(errors) break;
 458         }
 459         if(cmdp == 0)
 460         {
 461                 errors = 1;// No args
 462         }
 463
 464         //Validations
 465         if(errors)
 466         {
 467                 return usage_lf_config();
 468         }
 469         //Bps is limited to 8, so fits in lower half of arg1
 470         if(bps >> 8) bps = 8;
 471
 472         sample_config config = {
 473                 decimation,bps,averaging,divisor,trigger_threshold
 474         };
 475         //Averaging is a flag on high-bit of arg[1]
 476         UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
 477         memcpy(c.d.asBytes,&config,sizeof(sample_config));
 478         SendCommand(&c);
 479         return 0;
 480 }
 481
 482 int CmdLFRead(const char *Cmd)
 483 {
 484
 485         uint8_t cmdp = 0;
 486         bool arg1 = false;
 487         if (param_getchar(Cmd, cmdp) == 'h')
 488         {
 489                 return usage_lf_read();
 490         }
 491         if (param_getchar(Cmd, cmdp) == 's') arg1 = true; //suppress print
 492         //And ship it to device
 493         UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
 494         SendCommand(&c);
 495         //WaitForResponse(CMD_ACK,NULL);
 496         if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
 497                 PrintAndLog("command execution time out");
 498                 return 1;
 499         }
 500
 501         return 0;
 502 }
 503
 504 int CmdLFSnoop(const char *Cmd)
 505 {
 506         uint8_t cmdp =0;
 507         if(param_getchar(Cmd, cmdp) == 'h')
 508         {
 509                 return usage_lf_snoop();
 510         }
 511
 512         UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
 513         SendCommand(&c);
 514         WaitForResponse(CMD_ACK,NULL);
 515         return 0;
 516 }
 517
 518 static void ChkBitstream(const char *str)
 519 {
 520   int i;
 521
 522   /* convert to bitstream if necessary */
 523         for (i = 0; i < (int)(GraphTraceLen / 2); i++){
 524                 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
 525       CmdGetBitStream("");
 526       break;
 527     }
 528   }
 529 }
 530 //Attempt to simulate any wave in buffer (one bit per output sample)
 531 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
 532 int CmdLFSim(const char *Cmd)
 533 {
 534   int i,j;
 535   static int gap;
 536
 537   sscanf(Cmd, "%i", &gap);
 538
 539         // convert to bitstream if necessary
 540
 541   ChkBitstream(Cmd);
 542
 543         //can send only 512 bits at a time (1 byte sent per bit...)
 544   printf("Sending [%d bytes]", GraphTraceLen);
 545   for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
 546     UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 547
 548     for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
 549       c.d.asBytes[j] = GraphBuffer[i+j];
 550     }
 551     SendCommand(&c);
 552     WaitForResponse(CMD_ACK,NULL);
 553     printf(".");
 554   }
 555
 556   printf("\n");
 557   PrintAndLog("Starting to simulate");
 558   UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 559   SendCommand(&c);
 560   return 0;
 561 }
 562
 563 int usage_lf_simfsk(void)
 564 {
 565   //print help
 566   PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
 567   PrintAndLog("Options:        ");
 568   PrintAndLog("       h              This help");
 569   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 570   PrintAndLog("       i              invert data");
 571   PrintAndLog("       H <fcHigh>     Manually set the larger Field Clock");
 572   PrintAndLog("       L <fcLow>      Manually set the smaller Field Clock");
 573   //PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 574   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 575   PrintAndLog("\n  NOTE: if you set one clock manually set them all manually");
 576   return 0;
 577 }
 578
 579 int usage_lf_simask(void)
 580 {
 581   //print help
 582   PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
 583   PrintAndLog("Options:        ");
 584   PrintAndLog("       h              This help");
 585   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 586   PrintAndLog("       i              invert data");
 587   PrintAndLog("       b              sim ask/biphase");
 588   PrintAndLog("       m              sim ask/manchester - Default");
 589   PrintAndLog("       r              sim ask/raw");
 590   PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 591   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 592   return 0;
 593 }
 594
 595 int usage_lf_simpsk(void)
 596 {
 597   //print help
 598   PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
 599   PrintAndLog("Options:        ");
 600   PrintAndLog("       h              This help");
 601   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 602   PrintAndLog("       i              invert data");
 603   PrintAndLog("       1              set PSK1 (default)");
 604   PrintAndLog("       2              set PSK2");
 605   PrintAndLog("       3              set PSK3");
 606   PrintAndLog("       r <carrier>    2|4|8 are valid carriers: default = 2");
 607   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 608   return 0;
 609 }
 610
 611 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
 612 // - allow pull data from DemodBuffer
 613 int CmdLFfskSim(const char *Cmd)
 614 {
 615         //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
 616         // otherwise will need FChigh, FClow, Clock, and bitstream
 617   uint8_t fcHigh=0, fcLow=0, clk=0;
 618   uint8_t invert=0;
 619   bool errors = FALSE;
 620   char hexData[32] = {0x00}; // store entered hex data
 621   uint8_t data[255] = {0x00};
 622   int dataLen = 0;
 623   uint8_t cmdp = 0;
 624   while(param_getchar(Cmd, cmdp) != 0x00)
 625   {
 626     switch(param_getchar(Cmd, cmdp))
 627     {
 628     case 'h':
 629       return usage_lf_simfsk();
 630     case 'i':
 631       invert = 1;
 632       cmdp++;
 633       break;
 634     case 'c':
 635       errors |= param_getdec(Cmd,cmdp+1,&clk);
 636       cmdp+=2;
 637       break;
 638     case 'H':
 639       errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
 640       cmdp+=2;
 641       break;
 642     case 'L':
 643       errors |= param_getdec(Cmd,cmdp+1,&fcLow);
 644       cmdp+=2;
 645       break;
 646     //case 's':
 647     //  separator=1;
 648     //  cmdp++;
 649     //  break;
 650     case 'd':
 651       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 652       if (dataLen==0) {
 653         errors=TRUE;
 654       } else {
 655         dataLen = hextobinarray((char *)data, hexData);
 656       }
 657       if (dataLen==0) errors=TRUE;
 658       if (errors) PrintAndLog ("Error getting hex data");
 659       cmdp+=2;
 660       break;
 661     default:
 662       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 663       errors = TRUE;
 664       break;
 665     }
 666     if(errors) break;
 667   }
 668   if(cmdp == 0 && DemodBufferLen == 0)
 669   {
 670     errors = TRUE;// No args
 671   }
 672
 673   //Validations
 674   if(errors)
 675   {
 676     return usage_lf_simfsk();
 677   }
 678
 679   if (dataLen == 0){ //using DemodBuffer
 680     if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
 681       uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
 682       if (ans==0){
 683         if (!fcHigh) fcHigh=10;
 684         if (!fcLow) fcLow=8;
 685         if (!clk) clk=50;
 686       }
 687     }
 688   } else {
 689     setDemodBuf(data, dataLen, 0);
 690   }
 691
 692         //default if not found
 693   if (clk == 0) clk = 50;
 694   if (fcHigh == 0) fcHigh = 10;
 695   if (fcLow == 0) fcLow = 8;
 696
 697   uint16_t arg1, arg2;
 698   arg1 = fcHigh << 8 | fcLow;
 699   arg2 = invert << 8 | clk;
 700   size_t size = DemodBufferLen;
 701   if (size > USB_CMD_DATA_SIZE) {
 702     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 703     size = USB_CMD_DATA_SIZE;
 704   }
 705   UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 706
 707   memcpy(c.d.asBytes, DemodBuffer, size);
 708   SendCommand(&c);
 709   return 0;
 710 }
 711
 712 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
 713 // - allow pull data from DemodBuffer
 714 int CmdLFaskSim(const char *Cmd)
 715 {
 716   //autodetect clock from Graphbuffer if using demod buffer
 717         // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
 718   uint8_t encoding = 1, separator = 0;
 719   uint8_t clk=0, invert=0;
 720   bool errors = FALSE;
 721   char hexData[32] = {0x00};
 722   uint8_t data[255]= {0x00}; // store entered hex data
 723   int dataLen = 0;
 724   uint8_t cmdp = 0;
 725   while(param_getchar(Cmd, cmdp) != 0x00)
 726   {
 727     switch(param_getchar(Cmd, cmdp))
 728     {
 729     case 'h':
 730       return usage_lf_simask();
 731     case 'i':
 732       invert = 1;
 733       cmdp++;
 734       break;
 735     case 'c':
 736       errors |= param_getdec(Cmd,cmdp+1,&clk);
 737       cmdp+=2;
 738       break;
 739     case 'b':
 740       encoding=2; //biphase
 741       cmdp++;
 742       break;
 743     case 'm':
 744       encoding=1;
 745       cmdp++;
 746       break;
 747     case 'r':
 748       encoding=0;
 749       cmdp++;
 750       break;
 751     case 's':
 752       separator=1;
 753       cmdp++;
 754       break;
 755     case 'd':
 756       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 757       if (dataLen==0) {
 758         errors=TRUE;
 759       } else {
 760         dataLen = hextobinarray((char *)data, hexData);
 761       }
 762       if (dataLen==0) errors=TRUE;
 763       if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
 764         cmdp+=2;
 765       break;
 766     default:
 767       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 768       errors = TRUE;
 769       break;
 770     }
 771     if(errors) break;
 772   }
 773   if(cmdp == 0 && DemodBufferLen == 0)
 774   {
 775     errors = TRUE;// No args
 776   }
 777
 778   //Validations
 779   if(errors)
 780   {
 781     return usage_lf_simask();
 782   }
 783   if (dataLen == 0){ //using DemodBuffer
 784     if (clk == 0) clk = GetAskClock("0", false, false);
 785   } else {
 786     setDemodBuf(data, dataLen, 0);
 787   }
 788   if (clk == 0) clk = 64;
 789   if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
 790   uint16_t arg1, arg2;
 791   size_t size=DemodBufferLen;
 792   arg1 = clk << 8 | encoding;
 793   arg2 = invert << 8 | separator;
 794   if (size > USB_CMD_DATA_SIZE) {
 795     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 796     size = USB_CMD_DATA_SIZE;
 797   }
 798   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 799   PrintAndLog("preparing to sim ask data: %d bits", size);
 800   memcpy(c.d.asBytes, DemodBuffer, size);
 801   SendCommand(&c);
 802   return 0;
 803 }
 804
 805 // by marshmellow - sim psk data given carrier, clock, invert
 806 // - allow pull data from DemodBuffer or parameters
 807 int CmdLFpskSim(const char *Cmd)
 808 {
 809   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 810   //will need carrier, Clock, and bitstream
 811   uint8_t carrier=0, clk=0;
 812   uint8_t invert=0;
 813   bool errors = FALSE;
 814   char hexData[32] = {0x00}; // store entered hex data
 815   uint8_t data[255] = {0x00};
 816   int dataLen = 0;
 817   uint8_t cmdp = 0;
 818   uint8_t pskType = 1;
 819   while(param_getchar(Cmd, cmdp) != 0x00)
 820   {
 821     switch(param_getchar(Cmd, cmdp))
 822     {
 823     case 'h':
 824       return usage_lf_simpsk();
 825     case 'i':
 826       invert = 1;
 827       cmdp++;
 828       break;
 829     case 'c':
 830       errors |= param_getdec(Cmd,cmdp+1,&clk);
 831       cmdp+=2;
 832       break;
 833     case 'r':
 834       errors |= param_getdec(Cmd,cmdp+1,&carrier);
 835       cmdp+=2;
 836       break;
 837     case '1':
 838       pskType=1;
 839       cmdp++;
 840       break;
 841     case '2':
 842       pskType=2;
 843       cmdp++;
 844       break;
 845     case '3':
 846       pskType=3;
 847       cmdp++;
 848       break;
 849     case 'd':
 850       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 851       if (dataLen==0) {
 852         errors=TRUE;
 853       } else {
 854         dataLen = hextobinarray((char *)data, hexData);
 855       }
 856       if (dataLen==0) errors=TRUE;
 857       if (errors) PrintAndLog ("Error getting hex data");
 858       cmdp+=2;
 859       break;
 860     default:
 861       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 862       errors = TRUE;
 863       break;
 864     }
 865     if (errors) break;
 866   }
 867   if (cmdp == 0 && DemodBufferLen == 0)
 868   {
 869     errors = TRUE;// No args
 870   }
 871
 872   //Validations
 873   if (errors)
 874   {
 875     return usage_lf_simpsk();
 876   }
 877   if (dataLen == 0){ //using DemodBuffer
 878     PrintAndLog("Getting Clocks");
 879     if (clk==0) clk = GetPskClock("", FALSE, FALSE);
 880     PrintAndLog("clk: %d",clk);
 881     if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
 882     PrintAndLog("carrier: %d", carrier);
 883   } else {
 884     setDemodBuf(data, dataLen, 0);
 885   }
 886
 887   if (clk <= 0) clk = 32;
 888   if (carrier == 0) carrier = 2;
 889   if (pskType != 1){
 890     if (pskType == 2){
 891       //need to convert psk2 to psk1 data before sim
 892       psk2TOpsk1(DemodBuffer, DemodBufferLen);
 893     } else {
 894       PrintAndLog("Sorry, PSK3 not yet available");
 895     }
 896   }
 897   uint16_t arg1, arg2;
 898   arg1 = clk << 8 | carrier;
 899   arg2 = invert;
 900   size_t size=DemodBufferLen;
 901   if (size > USB_CMD_DATA_SIZE) {
 902     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 903     size=USB_CMD_DATA_SIZE;
 904   }
 905   UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
 906   PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
 907   memcpy(c.d.asBytes, DemodBuffer, size);
 908   SendCommand(&c);
 909
 910   return 0;
 911 }
 912
 913 int CmdLFSimBidir(const char *Cmd)
 914 {
 915   // Set ADC to twice the carrier for a slight supersampling
 916   // HACK: not implemented in ARMSRC.
 917   PrintAndLog("Not implemented yet.");
 918   UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
 919   SendCommand(&c);
 920   return 0;
 921 }
 922
 923 int CmdVchDemod(const char *Cmd)
 924 {
 925   // Is this the entire sync pattern, or does this also include some
 926   // data bits that happen to be the same everywhere? That would be
 927   // lovely to know.
 928   static const int SyncPattern[] = {
 929     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 930     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 931     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 932     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 933     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 934     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 935     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 936     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 937     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 938     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 939   };
 940
 941   // So first, we correlate for the sync pattern, and mark that.
 942   int bestCorrel = 0, bestPos = 0;
 943   int i;
 944   // It does us no good to find the sync pattern, with fewer than
 945   // 2048 samples after it...
 946   for (i = 0; i < (GraphTraceLen-2048); i++) {
 947     int sum = 0;
 948     int j;
 949     for (j = 0; j < arraylen(SyncPattern); j++) {
 950       sum += GraphBuffer[i+j]*SyncPattern[j];
 951     }
 952     if (sum > bestCorrel) {
 953       bestCorrel = sum;
 954       bestPos = i;
 955     }
 956   }
 957   PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
 958
 959   char bits[257];
 960   bits[256] = '\0';
 961
 962   int worst = INT_MAX;
 963   int worstPos = 0;
 964
 965   for (i = 0; i < 2048; i += 8) {
 966     int sum = 0;
 967     int j;
 968     for (j = 0; j < 8; j++) {
 969       sum += GraphBuffer[bestPos+i+j];
 970     }
 971     if (sum < 0) {
 972       bits[i/8] = '.';
 973     } else {
 974       bits[i/8] = '1';
 975     }
 976     if(abs(sum) < worst) {
 977       worst = abs(sum);
 978       worstPos = i;
 979     }
 980   }
 981   PrintAndLog("bits:");
 982   PrintAndLog("%s", bits);
 983   PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
 984
 985   if (strcmp(Cmd, "clone")==0) {
 986     GraphTraceLen = 0;
 987     char *s;
 988     for(s = bits; *s; s++) {
 989       int j;
 990       for(j = 0; j < 16; j++) {
 991         GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
 992       }
 993     }
 994     RepaintGraphWindow();
 995   }
 996   return 0;
 997 }
 998
 999 //by marshmellow
1000 int CmdLFfind(const char *Cmd)
1001 {
1002   int ans=0;
1003   char cmdp = param_getchar(Cmd, 0);
1004   char testRaw = param_getchar(Cmd, 1);
1005   if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1006     PrintAndLog("Usage:  lf search <0|1> [u]");
1007     PrintAndLog("     <use data from Graphbuffer> , if not set, try reading data from tag.");
1008     PrintAndLog("     [Search for Unknown tags] , if not set, reads only known tags.");
1009     PrintAndLog("");
1010     PrintAndLog("    sample: lf search     = try reading data from tag & search for known tags");
1011     PrintAndLog("          : lf search 1   = use data from GraphBuffer & search for known tags");
1012     PrintAndLog("          : lf search u   = try reading data from tag & search for known and unknown tags");
1013     PrintAndLog("          : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1014     return 0;
1015   }
1016
1017   if (!offline && (cmdp != '1')){
1018                 CmdLFRead("s");
1019                 getSamples("30000",false);
1020   } else if (GraphTraceLen < 1000) {
1021     PrintAndLog("Data in Graphbuffer was too small.");
1022     return 0;
1023   }
1024   if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1025
1026   PrintAndLog("NOTE: some demods output possible binary\n  if it finds something that looks like a tag");
1027   PrintAndLog("False Positives ARE possible\n");
1028   PrintAndLog("\nChecking for known tags:\n");
1029
1030   ans=CmdFSKdemodIO("");
1031
1032   if (ans>0) {
1033     PrintAndLog("\nValid IO Prox ID Found!");
1034     return 1;
1035   }
1036
1037   ans=CmdFSKdemodPyramid("");
1038   if (ans>0) {
1039     PrintAndLog("\nValid Pyramid ID Found!");
1040     return 1;
1041   }
1042
1043   ans=CmdFSKdemodParadox("");
1044   if (ans>0) {
1045     PrintAndLog("\nValid Paradox ID Found!");
1046     return 1;
1047   }
1048
1049   ans=CmdFSKdemodAWID("");
1050   if (ans>0) {
1051     PrintAndLog("\nValid AWID ID Found!");
1052     return 1;
1053   }
1054
1055   ans=CmdFSKdemodHID("");
1056   if (ans>0) {
1057     PrintAndLog("\nValid HID Prox ID Found!");
1058     return 1;
1059   }
1060
1061   //add psk and indala
1062   ans=CmdIndalaDecode("");
1063   if (ans>0) {
1064     PrintAndLog("\nValid Indala ID Found!");
1065     return 1;
1066   }
1067
1068   ans=CmdAskEM410xDemod("");
1069   if (ans>0) {
1070     PrintAndLog("\nValid EM410x ID Found!");
1071     return 1;
1072   }
1073
1074   ans=CmdG_Prox_II_Demod("");
1075   if (ans>0) {
1076     PrintAndLog("\nValid G Prox II ID Found!");
1077     return 1;
1078   }
1079
1080         ans=CmdFDXBdemodBI("");
1081         if (ans>0) {
1082                 PrintAndLog("\nValid FDX-B ID Found!");
1083                 return 1;
1084         }
1085
1086         ans=EM4x50Read("", false);
1087         if (ans>0) {
1088                 PrintAndLog("\nValid EM4x50 ID Found!");
1089                 return 1;
1090         }
1091
1092         ans=CmdPSKNexWatch("");
1093         if (ans>0) {
1094                 PrintAndLog("\nValid NexWatch ID Found!");
1095                 return 1;
1096         }
1097
1098   PrintAndLog("\nNo Known Tags Found!\n");
1099   if (testRaw=='u' || testRaw=='U'){
1100     //test unknown tag formats (raw mode)
1101     PrintAndLog("\nChecking for Unknown tags:\n");
1102     ans=AutoCorrelate(4000, FALSE, FALSE);
1103
1104     if (ans > 0) {
1105
1106                 PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1107
1108                 if ( ans % 8 == 0)  {
1109                         int bytes = (ans / 8);
1110                         PrintAndLog("Possible %d bytes", bytes);
1111                         int blocks = 0;
1112                         if ( bytes % 2 == 0) {
1113                                 blocks = (bytes / 2);
1114                                 PrintAndLog("Possible  2 blocks, width %d", blocks);
1115                         }
1116                         if ( bytes % 4 == 0) {
1117                                 blocks = (bytes / 4);
1118                                 PrintAndLog("Possible  4 blocks, width %d", blocks);
1119                         }
1120                         if ( bytes % 8 == 0) {
1121                                 blocks = (bytes / 8);
1122                                 PrintAndLog("Possible  8 blocks, width %d", blocks);
1123                         }
1124                         if ( bytes % 16 == 0) {
1125                                 blocks = (bytes / 16);
1126                                 PrintAndLog("Possible 16 blocks, width %d", blocks);
1127                         }
1128                 }
1129         }
1130                 ans=GetFskClock("",FALSE,FALSE);
1131     if (ans != 0){ //fsk
1132                         ans=FSKrawDemod("",TRUE);
1133       if (ans>0) {
1134         PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1135         return 1;
1136       }
1137     }
1138                 ans=ASKDemod("0 0 0",TRUE,FALSE,1);
1139     if (ans>0) {
1140       PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1141       PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1142       return 1;
1143     }
1144     ans=CmdPSK1rawDemod("");
1145     if (ans>0) {
1146       PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1147       PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1148       PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1149       return 1;
1150     }
1151     PrintAndLog("\nNo Data Found!\n");
1152   }
1153   return 0;
1154 }
1155
1156 static command_t CommandTable[] =
1157 {
1158   {"help",        CmdHelp,            1, "This help"},
1159   {"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
1160   {"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
1161   {"hitag",       CmdLFHitag,         1, "{ HITAG RFIDs... }"},
1162   {"io",          CmdLFIO,                1, "{ IOPROX RFIDs... }"},
1163   {"pcf7931",     CmdLFPCF7931,       1, "{ PCF7931 RFIDs... }"},
1164   {"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
1165   {"t55xx",       CmdLFT55XX,         1, "{ T55X7 RFIDs... }"},
1166
1167   {"config",      CmdLFSetConfig,     0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1168
1169   {"cmdread",     CmdLFCommandRead,   0, "<off period> <'0' period> <'1' period> <command> ['h' 134] \n\t\t-- Modulate LF reader field to send command before read (all periods in microseconds)"},
1170   {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
1171   {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1172   {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1173   {"read",        CmdLFRead,          0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1174   {"search",      CmdLFfind,          1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) \n\t\t- 'u' to search for unknown tags"},
1175   {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1176   {"simask",      CmdLFaskSim,        0, "[clock] [invert <1|0>] [manchester/raw <'m'|'r'>] [msg separator 's'] [d <hexdata>] \n\t\t-- Simulate LF ASK tag from demodbuffer or input"},
1177   {"simfsk",      CmdLFfskSim,        0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
1178   {"simpsk",      CmdLFpskSim,        0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] \n\t\t-- Simulate LF PSK tag from demodbuffer or input"},
1179   {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1180   {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold] -- Snoop LF (l:125khz, h:134khz)"},
1181   {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
1182   {NULL, NULL, 0, NULL}
1183 };
1184
1185 int CmdLF(const char *Cmd)
1186 {
1187   CmdsParse(CommandTable, Cmd);
1188   return 0;
1189 }
1190
1191 int CmdHelp(const char *Cmd)
1192 {
1193   CmdsHelp(CommandTable);
1194   return 0;
1195 }