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 "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("This function takes no arguments. ");
 366         PrintAndLog("Use 'lf config' to set parameters.");
 367         return 0;
 368 }
 369 int usage_lf_snoop()
 370 {
 371         PrintAndLog("Usage: lf snoop");
 372         PrintAndLog("Options:        ");
 373         PrintAndLog("       h            This help");
 374         PrintAndLog("This function takes no arguments. ");
 375         PrintAndLog("Use 'lf config' to set parameters.");
 376         return 0;
 377 }
 378
 379 int usage_lf_config()
 380 {
 381         PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
 382         PrintAndLog("Options:        ");
 383         PrintAndLog("       h             This help");
 384         PrintAndLog("       L             Low frequency (125 KHz)");
 385         PrintAndLog("       H             High frequency (134 KHz)");
 386         PrintAndLog("       q <divisor>   Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
 387         PrintAndLog("       b <bps>       Sets resolution of bits per sample. Default (max): 8");
 388         PrintAndLog("       d <decim>     Sets decimation. A value of N saves only 1 in N samples. Default: 1");
 389         PrintAndLog("       a [0|1]       Averaging - if set, will average the stored sample value when decimating. Default: 1");
 390         PrintAndLog("       t <threshold> Sets trigger threshold. 0 means no threshold");
 391         PrintAndLog("Examples:");
 392         PrintAndLog("      lf config b 8 L");
 393         PrintAndLog("                    Samples at 125KHz, 8bps.");
 394         PrintAndLog("      lf config H b 4 d 3");
 395         PrintAndLog("                    Samples at 134KHz, averages three samples into one, stored with ");
 396         PrintAndLog("                    a resolution of 4 bits per sample.");
 397         PrintAndLog("      lf read");
 398         PrintAndLog("                    Performs a read (active field)");
 399         PrintAndLog("      lf snoop");
 400         PrintAndLog("                    Performs a snoop (no active field)");
 401         return 0;
 402 }
 403
 404 int CmdLFSetConfig(const char *Cmd)
 405 {
 406
 407         uint8_t divisor =  0;//Frequency divisor
 408         uint8_t bps = 0; // Bits per sample
 409         uint8_t decimation = 0; //How many to keep
 410         bool averaging = 1; // Defaults to true
 411         bool errors = FALSE;
 412         int trigger_threshold =-1;//Means no change
 413         uint8_t unsigned_trigg = 0;
 414
 415         uint8_t cmdp =0;
 416         while(param_getchar(Cmd, cmdp) != 0x00)
 417         {
 418                 switch(param_getchar(Cmd, cmdp))
 419                 {
 420                 case 'h':
 421                         return usage_lf_config();
 422                 case 'H':
 423                         divisor = 88;
 424                         cmdp++;
 425                         break;
 426                 case 'L':
 427                         divisor = 95;
 428                         cmdp++;
 429                         break;
 430                 case 'q':
 431                         errors |= param_getdec(Cmd,cmdp+1,&divisor);
 432                         cmdp+=2;
 433                         break;
 434                 case 't':
 435                         errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
 436                         cmdp+=2;
 437                         if(!errors) trigger_threshold = unsigned_trigg;
 438                         break;
 439                 case 'b':
 440                         errors |= param_getdec(Cmd,cmdp+1,&bps);
 441                         cmdp+=2;
 442                         break;
 443                 case 'd':
 444                         errors |= param_getdec(Cmd,cmdp+1,&decimation);
 445                         cmdp+=2;
 446                         break;
 447                 case 'a':
 448                         averaging = param_getchar(Cmd,cmdp+1) == '1';
 449                         cmdp+=2;
 450                         break;
 451                 default:
 452                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 453                         errors = 1;
 454                         break;
 455                 }
 456                 if(errors) break;
 457         }
 458         if(cmdp == 0)
 459         {
 460                 errors = 1;// No args
 461         }
 462
 463         //Validations
 464         if(errors)
 465         {
 466                 return usage_lf_config();
 467         }
 468         //Bps is limited to 8, so fits in lower half of arg1
 469         if(bps >> 8) bps = 8;
 470
 471         sample_config config = {
 472                 decimation,bps,averaging,divisor,trigger_threshold
 473         };
 474         //Averaging is a flag on high-bit of arg[1]
 475         UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
 476         memcpy(c.d.asBytes,&config,sizeof(sample_config));
 477         SendCommand(&c);
 478         return 0;
 479 }
 480
 481 int CmdLFRead(const char *Cmd)
 482 {
 483
 484         uint8_t cmdp =0;
 485         if(param_getchar(Cmd, cmdp) == 'h')
 486         {
 487                 return usage_lf_read();
 488         }
 489         //And ship it to device
 490         UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K};
 491         SendCommand(&c);
 492         //WaitForResponse(CMD_ACK,NULL);
 493         if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
 494                 PrintAndLog("command execution time out");
 495                 return 1;
 496         }
 497
 498         return 0;
 499 }
 500
 501 int CmdLFSnoop(const char *Cmd)
 502 {
 503         uint8_t cmdp =0;
 504         if(param_getchar(Cmd, cmdp) == 'h')
 505         {
 506                 return usage_lf_snoop();
 507         }
 508
 509         UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
 510         SendCommand(&c);
 511         WaitForResponse(CMD_ACK,NULL);
 512         return 0;
 513 }
 514
 515 static void ChkBitstream(const char *str)
 516 {
 517   int i;
 518
 519   /* convert to bitstream if necessary */
 520         for (i = 0; i < (int)(GraphTraceLen / 2); i++){
 521                 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
 522       CmdGetBitStream("");
 523       break;
 524     }
 525   }
 526 }
 527 //appears to attempt to simulate manchester
 528 int CmdLFSim(const char *Cmd)
 529 {
 530   int i,j;
 531   static int gap;
 532
 533   sscanf(Cmd, "%i", &gap);
 534
 535   /* convert to bitstream if necessary */
 536
 537   ChkBitstream(Cmd);
 538
 539   //can send 512 bits at a time (1 byte sent per bit...)
 540   printf("Sending [%d bytes]", GraphTraceLen);
 541   for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
 542     UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 543
 544     for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
 545       c.d.asBytes[j] = GraphBuffer[i+j];
 546     }
 547     SendCommand(&c);
 548     WaitForResponse(CMD_ACK,NULL);
 549     printf(".");
 550   }
 551
 552   printf("\n");
 553   PrintAndLog("Starting to simulate");
 554   UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 555   SendCommand(&c);
 556   return 0;
 557 }
 558
 559 int usage_lf_simfsk(void)
 560 {
 561   //print help
 562   PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
 563   PrintAndLog("Options:        ");
 564   PrintAndLog("       h              This help");
 565   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 566   PrintAndLog("       i              invert data");
 567   PrintAndLog("       H <fcHigh>     Manually set the larger Field Clock");
 568   PrintAndLog("       L <fcLow>      Manually set the smaller Field Clock");
 569   //PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 570   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 571   PrintAndLog("\n  NOTE: if you set one clock manually set them all manually");
 572   return 0;
 573 }
 574
 575 int usage_lf_simask(void)
 576 {
 577   //print help
 578   PrintAndLog("Usage: lf simask [c <clock>] [i] [m|r] [s] [d <raw hex to sim>]");
 579   PrintAndLog("Options:        ");
 580   PrintAndLog("       h              This help");
 581   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 582   PrintAndLog("       i              invert data");
 583   PrintAndLog("       m              sim ask/manchester");
 584   PrintAndLog("       r              sim ask/raw");
 585   PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 586   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 587   return 0;
 588 }
 589
 590 int usage_lf_simpsk(void)
 591 {
 592   //print help
 593   PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
 594   PrintAndLog("Options:        ");
 595   PrintAndLog("       h              This help");
 596   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 597   PrintAndLog("       i              invert data");
 598   PrintAndLog("       1              set PSK1 (default)");
 599   PrintAndLog("       2              set PSK2");
 600   PrintAndLog("       3              set PSK3");
 601   PrintAndLog("       r <carrier>    2|4|8 are valid carriers: default = 2");
 602   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 603   return 0;
 604 }
 605
 606 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
 607 // - allow pull data from DemodBuffer
 608 int CmdLFfskSim(const char *Cmd)
 609 {
 610   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 611   //will need FChigh, FClow, Clock, and bitstream
 612   uint8_t fcHigh=0, fcLow=0, clk=0;
 613   uint8_t invert=0;
 614   bool errors = FALSE;
 615   char hexData[32] = {0x00}; // store entered hex data
 616   uint8_t data[255] = {0x00};
 617   int dataLen = 0;
 618   uint8_t cmdp = 0;
 619   while(param_getchar(Cmd, cmdp) != 0x00)
 620   {
 621     switch(param_getchar(Cmd, cmdp))
 622     {
 623     case 'h':
 624       return usage_lf_simfsk();
 625     case 'i':
 626       invert = 1;
 627       cmdp++;
 628       break;
 629     case 'c':
 630       errors |= param_getdec(Cmd,cmdp+1,&clk);
 631       cmdp+=2;
 632       break;
 633     case 'H':
 634       errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
 635       cmdp+=2;
 636       break;
 637     case 'L':
 638       errors |= param_getdec(Cmd,cmdp+1,&fcLow);
 639       cmdp+=2;
 640       break;
 641     //case 's':
 642     //  separator=1;
 643     //  cmdp++;
 644     //  break;
 645     case 'd':
 646       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 647       if (dataLen==0) {
 648         errors=TRUE;
 649       } else {
 650         dataLen = hextobinarray((char *)data, hexData);
 651       }
 652       if (dataLen==0) errors=TRUE;
 653       if (errors) PrintAndLog ("Error getting hex data");
 654       cmdp+=2;
 655       break;
 656     default:
 657       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 658       errors = TRUE;
 659       break;
 660     }
 661     if(errors) break;
 662   }
 663   if(cmdp == 0 && DemodBufferLen == 0)
 664   {
 665     errors = TRUE;// No args
 666   }
 667
 668   //Validations
 669   if(errors)
 670   {
 671     return usage_lf_simfsk();
 672   }
 673
 674   if (dataLen == 0){ //using DemodBuffer
 675     if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
 676       uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
 677       if (ans==0){
 678         if (!fcHigh) fcHigh=10;
 679         if (!fcLow) fcLow=8;
 680         if (!clk) clk=50;
 681       }
 682     }
 683   } else {
 684     setDemodBuf(data, dataLen, 0);
 685   }
 686   if (clk == 0) clk = 50;
 687   if (fcHigh == 0) fcHigh = 10;
 688   if (fcLow == 0) fcLow = 8;
 689
 690   uint16_t arg1, arg2;
 691   arg1 = fcHigh << 8 | fcLow;
 692   arg2 = invert << 8 | clk;
 693   size_t size = DemodBufferLen;
 694   if (size > USB_CMD_DATA_SIZE) {
 695     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 696     size = USB_CMD_DATA_SIZE;
 697   }
 698   UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 699
 700   memcpy(c.d.asBytes, DemodBuffer, size);
 701   SendCommand(&c);
 702   return 0;
 703 }
 704
 705 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
 706 // - allow pull data from DemodBuffer
 707 int CmdLFaskSim(const char *Cmd)
 708 {
 709   //autodetect clock from Graphbuffer if using demod buffer
 710   //will need clock, invert, manchester/raw as m or r, separator as s, and bitstream
 711   uint8_t manchester = 1, separator = 0;
 712   //char cmdp = Cmd[0], par3='m', par4=0;
 713   uint8_t clk=0, invert=0;
 714   bool errors = FALSE;
 715   char hexData[32] = {0x00};
 716   uint8_t data[255]= {0x00}; // store entered hex data
 717   int dataLen = 0;
 718   uint8_t cmdp = 0;
 719   while(param_getchar(Cmd, cmdp) != 0x00)
 720   {
 721     switch(param_getchar(Cmd, cmdp))
 722     {
 723     case 'h':
 724       return usage_lf_simask();
 725     case 'i':
 726       invert = 1;
 727       cmdp++;
 728       break;
 729     case 'c':
 730       errors |= param_getdec(Cmd,cmdp+1,&clk);
 731       cmdp+=2;
 732       break;
 733     case 'm':
 734       manchester=1;
 735       cmdp++;
 736       break;
 737     case 'r':
 738       manchester=0;
 739       cmdp++;
 740       break;
 741     case 's':
 742       separator=1;
 743       cmdp++;
 744       break;
 745     case 'd':
 746       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 747       if (dataLen==0) {
 748         errors=TRUE;
 749       } else {
 750         dataLen = hextobinarray((char *)data, hexData);
 751       }
 752       if (dataLen==0) errors=TRUE;
 753       if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
 754         cmdp+=2;
 755       break;
 756     default:
 757       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 758       errors = TRUE;
 759       break;
 760     }
 761     if(errors) break;
 762   }
 763   if(cmdp == 0 && DemodBufferLen == 0)
 764   {
 765     errors = TRUE;// No args
 766   }
 767
 768   //Validations
 769   if(errors)
 770   {
 771     return usage_lf_simask();
 772   }
 773   if (dataLen == 0){ //using DemodBuffer
 774     if (clk == 0) clk = GetAskClock("0", false, false);
 775   } else {
 776     setDemodBuf(data, dataLen, 0);
 777   }
 778   if (clk == 0) clk = 64;
 779   if (manchester == 0) clk = clk/2; //askraw needs to double the clock speed
 780   uint16_t arg1, arg2;
 781   size_t size=DemodBufferLen;
 782   arg1 = clk << 8 | manchester;
 783   arg2 = invert << 8 | separator;
 784   if (size > USB_CMD_DATA_SIZE) {
 785     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 786     size = USB_CMD_DATA_SIZE;
 787   }
 788   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 789   PrintAndLog("preparing to sim ask data: %d bits", size);
 790   memcpy(c.d.asBytes, DemodBuffer, size);
 791   SendCommand(&c);
 792   return 0;
 793 }
 794
 795 // by marshmellow - sim psk data given carrier, clock, invert
 796 // - allow pull data from DemodBuffer or parameters
 797 int CmdLFpskSim(const char *Cmd)
 798 {
 799   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 800   //will need carrier, Clock, and bitstream
 801   uint8_t carrier=0, clk=0;
 802   uint8_t invert=0;
 803   bool errors = FALSE;
 804   char hexData[32] = {0x00}; // store entered hex data
 805   uint8_t data[255] = {0x00};
 806   int dataLen = 0;
 807   uint8_t cmdp = 0;
 808   uint8_t pskType = 1;
 809   while(param_getchar(Cmd, cmdp) != 0x00)
 810   {
 811     switch(param_getchar(Cmd, cmdp))
 812     {
 813     case 'h':
 814       return usage_lf_simpsk();
 815     case 'i':
 816       invert = 1;
 817       cmdp++;
 818       break;
 819     case 'c':
 820       errors |= param_getdec(Cmd,cmdp+1,&clk);
 821       cmdp+=2;
 822       break;
 823     case 'r':
 824       errors |= param_getdec(Cmd,cmdp+1,&carrier);
 825       cmdp+=2;
 826       break;
 827     case '1':
 828       pskType=1;
 829       cmdp++;
 830       break;
 831     case '2':
 832       pskType=2;
 833       cmdp++;
 834       break;
 835     case '3':
 836       pskType=3;
 837       cmdp++;
 838       break;
 839     case 'd':
 840       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 841       if (dataLen==0) {
 842         errors=TRUE;
 843       } else {
 844         dataLen = hextobinarray((char *)data, hexData);
 845       }
 846       if (dataLen==0) errors=TRUE;
 847       if (errors) PrintAndLog ("Error getting hex data");
 848       cmdp+=2;
 849       break;
 850     default:
 851       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 852       errors = TRUE;
 853       break;
 854     }
 855     if (errors) break;
 856   }
 857   if (cmdp == 0 && DemodBufferLen == 0)
 858   {
 859     errors = TRUE;// No args
 860   }
 861
 862   //Validations
 863   if (errors)
 864   {
 865     return usage_lf_simpsk();
 866   }
 867   if (dataLen == 0){ //using DemodBuffer
 868     PrintAndLog("Getting Clocks");
 869     if (clk==0) clk = GetPskClock("", FALSE, FALSE);
 870     PrintAndLog("clk: %d",clk);
 871     if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
 872     PrintAndLog("carrier: %d", carrier);
 873   } else {
 874     setDemodBuf(data, dataLen, 0);
 875   }
 876
 877   if (clk <= 0) clk = 32;
 878   if (carrier == 0) carrier = 2;
 879   if (pskType != 1){
 880     if (pskType == 2){
 881       //need to convert psk2 to psk1 data before sim
 882       psk2TOpsk1(DemodBuffer, DemodBufferLen);
 883     } else {
 884       PrintAndLog("Sorry, PSK3 not yet available");
 885     }
 886   }
 887   uint16_t arg1, arg2;
 888   arg1 = clk << 8 | carrier;
 889   arg2 = invert;
 890   size_t size=DemodBufferLen;
 891   if (size > USB_CMD_DATA_SIZE) {
 892     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 893     size=USB_CMD_DATA_SIZE;
 894   }
 895   UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
 896   PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
 897   memcpy(c.d.asBytes, DemodBuffer, size);
 898   SendCommand(&c);
 899
 900   return 0;
 901 }
 902
 903 int CmdLFSimBidir(const char *Cmd)
 904 {
 905   // Set ADC to twice the carrier for a slight supersampling
 906   // HACK: not implemented in ARMSRC.
 907   PrintAndLog("Not implemented yet.");
 908   UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
 909   SendCommand(&c);
 910   return 0;
 911 }
 912
 913 /* simulate an LF Manchester encoded tag with specified bitstream, clock rate and inter-id gap */
 914 /*
 915 int CmdLFSimManchester(const char *Cmd)
 916 {
 917   static int clock, gap;
 918   static char data[1024], gapstring[8];
 919
 920   sscanf(Cmd, "%i %s %i", &clock, &data[0], &gap);
 921
 922   ClearGraph(0);
 923
 924   for (int i = 0; i < strlen(data) ; ++i)
 925     AppendGraph(0, clock, data[i]- '0');
 926
 927   CmdManchesterMod("");
 928
 929   RepaintGraphWindow();
 930
 931   sprintf(&gapstring[0], "%i", gap);
 932   CmdLFSim(gapstring);
 933   return 0;
 934 }
 935 */
 936
 937 int CmdVchDemod(const char *Cmd)
 938 {
 939   // Is this the entire sync pattern, or does this also include some
 940   // data bits that happen to be the same everywhere? That would be
 941   // lovely to know.
 942   static const int SyncPattern[] = {
 943     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 944     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 945     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 946     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 947     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 948     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 949     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 950     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 951     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 952     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 953   };
 954
 955   // So first, we correlate for the sync pattern, and mark that.
 956   int bestCorrel = 0, bestPos = 0;
 957   int i;
 958   // It does us no good to find the sync pattern, with fewer than
 959   // 2048 samples after it...
 960   for (i = 0; i < (GraphTraceLen-2048); i++) {
 961     int sum = 0;
 962     int j;
 963     for (j = 0; j < arraylen(SyncPattern); j++) {
 964       sum += GraphBuffer[i+j]*SyncPattern[j];
 965     }
 966     if (sum > bestCorrel) {
 967       bestCorrel = sum;
 968       bestPos = i;
 969     }
 970   }
 971   PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
 972
 973   char bits[257];
 974   bits[256] = '\0';
 975
 976   int worst = INT_MAX;
 977   int worstPos = 0;
 978
 979   for (i = 0; i < 2048; i += 8) {
 980     int sum = 0;
 981     int j;
 982     for (j = 0; j < 8; j++) {
 983       sum += GraphBuffer[bestPos+i+j];
 984     }
 985     if (sum < 0) {
 986       bits[i/8] = '.';
 987     } else {
 988       bits[i/8] = '1';
 989     }
 990     if(abs(sum) < worst) {
 991       worst = abs(sum);
 992       worstPos = i;
 993     }
 994   }
 995   PrintAndLog("bits:");
 996   PrintAndLog("%s", bits);
 997   PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
 998
 999   if (strcmp(Cmd, "clone")==0) {
1000     GraphTraceLen = 0;
1001     char *s;
1002     for(s = bits; *s; s++) {
1003       int j;
1004       for(j = 0; j < 16; j++) {
1005         GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1006       }
1007     }
1008     RepaintGraphWindow();
1009   }
1010   return 0;
1011 }
1012
1013 //by marshmellow
1014 int CmdLFfind(const char *Cmd)
1015 {
1016   int ans=0;
1017   char cmdp = param_getchar(Cmd, 0);
1018   char testRaw = param_getchar(Cmd, 1);
1019   if (strlen(Cmd) > 2 || cmdp == 'h' || cmdp == 'H') {
1020     PrintAndLog("Usage:  lf search <0|1> [u]");
1021     PrintAndLog("     <use data from Graphbuffer> , if not set, try reading data from tag.");
1022     PrintAndLog("     [Search for Unknown tags] , if not set, reads only known tags.");
1023     PrintAndLog("");
1024     PrintAndLog("    sample: lf search     = try reading data from tag & search for known tags");
1025     PrintAndLog("          : lf search 1   = use data from GraphBuffer & search for known tags");
1026     PrintAndLog("          : lf search u   = try reading data from tag & search for known and unknown tags");
1027     PrintAndLog("          : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1028
1029     return 0;
1030   }
1031
1032   if (!offline && (cmdp != '1')){
1033     ans=CmdLFRead("");
1034     ans=CmdSamples("20000");
1035   } else if (GraphTraceLen < 1000) {
1036     PrintAndLog("Data in Graphbuffer was too small.");
1037     return 0;
1038   }
1039   if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1040   PrintAndLog("NOTE: some demods output possible binary\n  if it finds something that looks like a tag");
1041   PrintAndLog("False Positives ARE possible\n");
1042   PrintAndLog("\nChecking for known tags:\n");
1043   ans=CmdFSKdemodIO("");
1044   if (ans>0) {
1045     PrintAndLog("\nValid IO Prox ID Found!");
1046     return 1;
1047   }
1048   ans=CmdFSKdemodPyramid("");
1049   if (ans>0) {
1050     PrintAndLog("\nValid Pyramid ID Found!");
1051     return 1;
1052   }
1053   ans=CmdFSKdemodParadox("");
1054   if (ans>0) {
1055     PrintAndLog("\nValid Paradox ID Found!");
1056     return 1;
1057   }
1058   ans=CmdFSKdemodAWID("");
1059   if (ans>0) {
1060     PrintAndLog("\nValid AWID ID Found!");
1061     return 1;
1062   }
1063   ans=CmdFSKdemodHID("");
1064   if (ans>0) {
1065     PrintAndLog("\nValid HID Prox ID Found!");
1066     return 1;
1067   }
1068   //add psk and indala
1069   ans=CmdIndalaDecode("");
1070   if (ans>0) {
1071     PrintAndLog("\nValid Indala ID Found!");
1072     return 1;
1073   }
1074   ans=CmdAskEM410xDemod("");
1075   if (ans>0) {
1076     PrintAndLog("\nValid EM410x ID Found!");
1077     return 1;
1078   }
1079   ans=CmdG_Prox_II_Demod("");
1080   if (ans>0) {
1081     PrintAndLog("\nValid G Prox II ID Found!");
1082     return 1;
1083   }
1084   PrintAndLog("\nNo Known Tags Found!\n");
1085   if (testRaw=='u' || testRaw=='U'){
1086     //test unknown tag formats (raw mode)
1087     PrintAndLog("\nChecking for Unknown tags:\n");
1088     ans=CmdDetectClockRate("f");
1089     if (ans != 0){ //fsk
1090       ans=CmdFSKrawdemod("");
1091       if (ans>0) {
1092         PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1093         return 1;
1094       }
1095     }
1096     ans=Cmdaskmandemod("");
1097     if (ans>0) {
1098       PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1099       return 1;
1100     }
1101     ans=CmdPSK1rawDemod("");
1102     if (ans>0) {
1103       PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data psk2rawdemod'");
1104       PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1105       PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1106       return 1;
1107     }
1108     PrintAndLog("\nNo Data Found!\n");
1109   }
1110   return 0;
1111 }
1112
1113 static command_t CommandTable[] =
1114 {
1115   {"help",        CmdHelp,            1, "This help"},
1116   {"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
1117   {"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
1118   {"hitag",       CmdLFHitag,         1, "{ HITAG RFIDs... }"},
1119   {"io",          CmdLFIO,                1, "{ IOPROX RFIDs... }"},
1120   {"pcf7931",     CmdLFPCF7931,       1, "{ PCF7931 RFIDs... }"},
1121   {"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
1122   {"t55xx",       CmdLFT55XX,         1, "{ T55X7 RFIDs... }"},
1123
1124   {"config",      CmdLFSetConfig,     0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1125
1126   {"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)"},
1127   {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
1128   {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1129   {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1130   {"read",        CmdLFRead,          0, "Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1131   {"search",      CmdLFfind,          1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) - 'u' to search for unknown tags"},
1132   {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1133   {"simask",      CmdLFaskSim,        0, "[clock] [invert <1|0>] [manchester/raw <'m'|'r'>] [msg separator 's'] [d <hexdata>] -- Simulate LF ASK tag from demodbuffer or input"},
1134   {"simfsk",      CmdLFfskSim,        0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] -- Simulate LF FSK tag from demodbuffer or input"},
1135   {"simpsk",      CmdLFpskSim,        0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] -- Simulate LF PSK tag from demodbuffer or input"},
1136   {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1137   //{"simman",      CmdLFSimManchester, 0, "<Clock> <Bitstream> [GAP] Simulate arbitrary Manchester LF tag"},
1138   {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1139   {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
1140   {NULL, NULL, 0, NULL}
1141 };
1142
1143 int CmdLF(const char *Cmd)
1144 {
1145   CmdsParse(CommandTable, Cmd);
1146   return 0;
1147 }
1148
1149 int CmdHelp(const char *Cmd)
1150 {
1151   CmdsHelp(CommandTable);
1152   return 0;
1153 }