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         return 0;
 494 }
 495
 496 int CmdLFSnoop(const char *Cmd)
 497 {
 498         uint8_t cmdp =0;
 499         if(param_getchar(Cmd, cmdp) == 'h')
 500         {
 501                 return usage_lf_snoop();
 502         }
 503
 504         UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
 505         SendCommand(&c);
 506         WaitForResponse(CMD_ACK,NULL);
 507         return 0;
 508 }
 509
 510 static void ChkBitstream(const char *str)
 511 {
 512   int i;
 513
 514   /* convert to bitstream if necessary */
 515         for (i = 0; i < (int)(GraphTraceLen / 2); i++){
 516                 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
 517       CmdGetBitStream("");
 518       break;
 519     }
 520   }
 521 }
 522 //appears to attempt to simulate manchester
 523 int CmdLFSim(const char *Cmd)
 524 {
 525   int i,j;
 526   static int gap;
 527
 528   sscanf(Cmd, "%i", &gap);
 529
 530   /* convert to bitstream if necessary */
 531
 532   ChkBitstream(Cmd);
 533
 534   //can send 512 bits at a time (1 byte sent per bit...)
 535   printf("Sending [%d bytes]", GraphTraceLen);
 536   for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
 537     UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 538
 539     for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
 540       c.d.asBytes[j] = GraphBuffer[i+j];
 541     }
 542     SendCommand(&c);
 543     WaitForResponse(CMD_ACK,NULL);
 544     printf(".");
 545   }
 546
 547   printf("\n");
 548   PrintAndLog("Starting to simulate");
 549   UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 550   SendCommand(&c);
 551   return 0;
 552 }
 553
 554 int usage_lf_simfsk(void)
 555 {
 556   //print help
 557   PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
 558   PrintAndLog("Options:        ");
 559   PrintAndLog("       h              This help");
 560   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 561   PrintAndLog("       i              invert data");
 562   PrintAndLog("       H <fcHigh>     Manually set the larger Field Clock");
 563   PrintAndLog("       L <fcLow>      Manually set the smaller Field Clock");
 564   //PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 565   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 566   PrintAndLog("\n  NOTE: if you set one clock manually set them all manually");
 567   return 0;
 568 }
 569
 570 int usage_lf_simask(void)
 571 {
 572   //print help
 573   PrintAndLog("Usage: lf simask [c <clock>] [i] [m|r] [s] [d <raw hex to sim>]");
 574   PrintAndLog("Options:        ");
 575   PrintAndLog("       h              This help");
 576   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 577   PrintAndLog("       i              invert data");
 578   PrintAndLog("       m              sim ask/manchester");
 579   PrintAndLog("       r              sim ask/raw");
 580   PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 581   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 582   return 0;
 583 }
 584
 585 int usage_lf_simpsk(void)
 586 {
 587   //print help
 588   PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
 589   PrintAndLog("Options:        ");
 590   PrintAndLog("       h              This help");
 591   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 592   PrintAndLog("       i              invert data");
 593   PrintAndLog("       1              set PSK1 (default)");
 594   PrintAndLog("       2              set PSK2");
 595   PrintAndLog("       3              set PSK3");
 596   PrintAndLog("       r <carrier>    2|4|8 are valid carriers: default = 2");
 597   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 598   return 0;
 599 }
 600
 601 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
 602 // - allow pull data from DemodBuffer
 603 int CmdLFfskSim(const char *Cmd)
 604 {
 605   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 606   //will need FChigh, FClow, Clock, and bitstream
 607   uint8_t fcHigh=0, fcLow=0, clk=0;
 608   uint8_t invert=0;
 609   bool errors = FALSE;
 610   char hexData[32] = {0x00}; // store entered hex data
 611   uint8_t data[255] = {0x00};
 612   int dataLen = 0;
 613   uint8_t cmdp = 0;
 614   while(param_getchar(Cmd, cmdp) != 0x00)
 615   {
 616     switch(param_getchar(Cmd, cmdp))
 617     {
 618     case 'h':
 619       return usage_lf_simfsk();
 620     case 'i':
 621       invert = 1;
 622       cmdp++;
 623       break;
 624     case 'c':
 625       errors |= param_getdec(Cmd,cmdp+1,&clk);
 626       cmdp+=2;
 627       break;
 628     case 'H':
 629       errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
 630       cmdp+=2;
 631       break;
 632     case 'L':
 633       errors |= param_getdec(Cmd,cmdp+1,&fcLow);
 634       cmdp+=2;
 635       break;
 636     //case 's':
 637     //  separator=1;
 638     //  cmdp++;
 639     //  break;
 640     case 'd':
 641       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 642       if (dataLen==0) {
 643         errors=TRUE;
 644       } else {
 645         dataLen = hextobinarray((char *)data, hexData);
 646       }
 647       if (dataLen==0) errors=TRUE;
 648       if (errors) PrintAndLog ("Error getting hex data");
 649       cmdp+=2;
 650       break;
 651     default:
 652       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 653       errors = TRUE;
 654       break;
 655     }
 656     if(errors) break;
 657   }
 658   if(cmdp == 0 && DemodBufferLen == 0)
 659   {
 660     errors = TRUE;// No args
 661   }
 662
 663   //Validations
 664   if(errors)
 665   {
 666     return usage_lf_simfsk();
 667   }
 668
 669   if (dataLen == 0){ //using DemodBuffer
 670     if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
 671       uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
 672       if (ans==0){
 673         if (!fcHigh) fcHigh=10;
 674         if (!fcLow) fcLow=8;
 675         if (!clk) clk=50;
 676       }
 677     }
 678   } else {
 679     setDemodBuf(data, dataLen, 0);
 680   }
 681   if (clk == 0) clk = 50;
 682   if (fcHigh == 0) fcHigh = 10;
 683   if (fcLow == 0) fcLow = 8;
 684
 685   uint16_t arg1, arg2;
 686   arg1 = fcHigh << 8 | fcLow;
 687   arg2 = invert << 8 | clk;
 688   size_t size = DemodBufferLen;
 689   if (size > USB_CMD_DATA_SIZE) {
 690     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 691     size = USB_CMD_DATA_SIZE;
 692   }
 693   UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 694
 695   memcpy(c.d.asBytes, DemodBuffer, size);
 696   SendCommand(&c);
 697   return 0;
 698 }
 699
 700 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
 701 // - allow pull data from DemodBuffer
 702 int CmdLFaskSim(const char *Cmd)
 703 {
 704   //autodetect clock from Graphbuffer if using demod buffer
 705   //will need clock, invert, manchester/raw as m or r, separator as s, and bitstream
 706   uint8_t manchester = 1, separator = 0;
 707   //char cmdp = Cmd[0], par3='m', par4=0;
 708   uint8_t clk=0, invert=0;
 709   bool errors = FALSE;
 710   char hexData[32] = {0x00};
 711   uint8_t data[255]= {0x00}; // store entered hex data
 712   int dataLen = 0;
 713   uint8_t cmdp = 0;
 714   while(param_getchar(Cmd, cmdp) != 0x00)
 715   {
 716     switch(param_getchar(Cmd, cmdp))
 717     {
 718     case 'h':
 719       return usage_lf_simask();
 720     case 'i':
 721       invert = 1;
 722       cmdp++;
 723       break;
 724     case 'c':
 725       errors |= param_getdec(Cmd,cmdp+1,&clk);
 726       cmdp+=2;
 727       break;
 728     case 'm':
 729       manchester=1;
 730       cmdp++;
 731       break;
 732     case 'r':
 733       manchester=0;
 734       cmdp++;
 735       break;
 736     case 's':
 737       separator=1;
 738       cmdp++;
 739       break;
 740     case 'd':
 741       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 742       if (dataLen==0) {
 743         errors=TRUE;
 744       } else {
 745         dataLen = hextobinarray((char *)data, hexData);
 746       }
 747       if (dataLen==0) errors=TRUE;
 748       if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
 749         cmdp+=2;
 750       break;
 751     default:
 752       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 753       errors = TRUE;
 754       break;
 755     }
 756     if(errors) break;
 757   }
 758   if(cmdp == 0 && DemodBufferLen == 0)
 759   {
 760     errors = TRUE;// No args
 761   }
 762
 763   //Validations
 764   if(errors)
 765   {
 766     return usage_lf_simask();
 767   }
 768   if (dataLen == 0){ //using DemodBuffer
 769     if (clk == 0) clk = GetAskClock("0", false, false);
 770   } else {
 771     setDemodBuf(data, dataLen, 0);
 772   }
 773   if (clk == 0) clk = 64;
 774   if (manchester == 0) clk = clk/2; //askraw needs to double the clock speed
 775   uint16_t arg1, arg2;
 776   size_t size=DemodBufferLen;
 777   arg1 = clk << 8 | manchester;
 778   arg2 = invert << 8 | separator;
 779   if (size > USB_CMD_DATA_SIZE) {
 780     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 781     size = USB_CMD_DATA_SIZE;
 782   }
 783   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 784   PrintAndLog("preparing to sim ask data: %d bits", size);
 785   memcpy(c.d.asBytes, DemodBuffer, size);
 786   SendCommand(&c);
 787   return 0;
 788 }
 789
 790 // by marshmellow - sim psk data given carrier, clock, invert
 791 // - allow pull data from DemodBuffer or parameters
 792 int CmdLFpskSim(const char *Cmd)
 793 {
 794   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 795   //will need carrier, Clock, and bitstream
 796   uint8_t carrier=0, clk=0;
 797   uint8_t invert=0;
 798   bool errors = FALSE;
 799   char hexData[32] = {0x00}; // store entered hex data
 800   uint8_t data[255] = {0x00};
 801   int dataLen = 0;
 802   uint8_t cmdp = 0;
 803   uint8_t pskType = 1;
 804   while(param_getchar(Cmd, cmdp) != 0x00)
 805   {
 806     switch(param_getchar(Cmd, cmdp))
 807     {
 808     case 'h':
 809       return usage_lf_simpsk();
 810     case 'i':
 811       invert = 1;
 812       cmdp++;
 813       break;
 814     case 'c':
 815       errors |= param_getdec(Cmd,cmdp+1,&clk);
 816       cmdp+=2;
 817       break;
 818     case 'r':
 819       errors |= param_getdec(Cmd,cmdp+1,&carrier);
 820       cmdp+=2;
 821       break;
 822     case '1':
 823       pskType=1;
 824       cmdp++;
 825       break;
 826     case '2':
 827       pskType=2;
 828       cmdp++;
 829       break;
 830     case '3':
 831       pskType=3;
 832       cmdp++;
 833       break;
 834     case 'd':
 835       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 836       if (dataLen==0) {
 837         errors=TRUE;
 838       } else {
 839         dataLen = hextobinarray((char *)data, hexData);
 840       }
 841       if (dataLen==0) errors=TRUE;
 842       if (errors) PrintAndLog ("Error getting hex data");
 843       cmdp+=2;
 844       break;
 845     default:
 846       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 847       errors = TRUE;
 848       break;
 849     }
 850     if (errors) break;
 851   }
 852   if (cmdp == 0 && DemodBufferLen == 0)
 853   {
 854     errors = TRUE;// No args
 855   }
 856
 857   //Validations
 858   if (errors)
 859   {
 860     return usage_lf_simpsk();
 861   }
 862   if (dataLen == 0){ //using DemodBuffer
 863     PrintAndLog("Getting Clocks");
 864     if (clk==0) clk = GetPskClock("", FALSE, FALSE);
 865     PrintAndLog("clk: %d",clk);
 866     if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
 867     PrintAndLog("carrier: %d", carrier);
 868   } else {
 869     setDemodBuf(data, dataLen, 0);
 870   }
 871
 872   if (clk <= 0) clk = 32;
 873   if (carrier == 0) carrier = 2;
 874   if (pskType != 1){
 875     if (pskType == 2){
 876       //need to convert psk2 to psk1 data before sim
 877       psk2TOpsk1(DemodBuffer, DemodBufferLen);
 878     } else {
 879       PrintAndLog("Sorry, PSK3 not yet available");
 880     }
 881   }
 882   uint16_t arg1, arg2;
 883   arg1 = clk << 8 | carrier;
 884   arg2 = invert;
 885   size_t size=DemodBufferLen;
 886   if (size > USB_CMD_DATA_SIZE) {
 887     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 888     size=USB_CMD_DATA_SIZE;
 889   }
 890   UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
 891   PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
 892   memcpy(c.d.asBytes, DemodBuffer, size);
 893   SendCommand(&c);
 894
 895   return 0;
 896 }
 897
 898 int CmdLFSimBidir(const char *Cmd)
 899 {
 900   // Set ADC to twice the carrier for a slight supersampling
 901   // HACK: not implemented in ARMSRC.
 902   PrintAndLog("Not implemented yet.");
 903   UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
 904   SendCommand(&c);
 905   return 0;
 906 }
 907
 908 /* simulate an LF Manchester encoded tag with specified bitstream, clock rate and inter-id gap */
 909 /*
 910 int CmdLFSimManchester(const char *Cmd)
 911 {
 912   static int clock, gap;
 913   static char data[1024], gapstring[8];
 914
 915   sscanf(Cmd, "%i %s %i", &clock, &data[0], &gap);
 916
 917   ClearGraph(0);
 918
 919   for (int i = 0; i < strlen(data) ; ++i)
 920     AppendGraph(0, clock, data[i]- '0');
 921
 922   CmdManchesterMod("");
 923
 924   RepaintGraphWindow();
 925
 926   sprintf(&gapstring[0], "%i", gap);
 927   CmdLFSim(gapstring);
 928   return 0;
 929 }
 930 */
 931
 932 int CmdVchDemod(const char *Cmd)
 933 {
 934   // Is this the entire sync pattern, or does this also include some
 935   // data bits that happen to be the same everywhere? That would be
 936   // lovely to know.
 937   static const int SyncPattern[] = {
 938     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 939     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 940     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 941     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 942     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 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   };
 949
 950   // So first, we correlate for the sync pattern, and mark that.
 951   int bestCorrel = 0, bestPos = 0;
 952   int i;
 953   // It does us no good to find the sync pattern, with fewer than
 954   // 2048 samples after it...
 955   for (i = 0; i < (GraphTraceLen-2048); i++) {
 956     int sum = 0;
 957     int j;
 958     for (j = 0; j < arraylen(SyncPattern); j++) {
 959       sum += GraphBuffer[i+j]*SyncPattern[j];
 960     }
 961     if (sum > bestCorrel) {
 962       bestCorrel = sum;
 963       bestPos = i;
 964     }
 965   }
 966   PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
 967
 968   char bits[257];
 969   bits[256] = '\0';
 970
 971   int worst = INT_MAX;
 972   int worstPos = 0;
 973
 974   for (i = 0; i < 2048; i += 8) {
 975     int sum = 0;
 976     int j;
 977     for (j = 0; j < 8; j++) {
 978       sum += GraphBuffer[bestPos+i+j];
 979     }
 980     if (sum < 0) {
 981       bits[i/8] = '.';
 982     } else {
 983       bits[i/8] = '1';
 984     }
 985     if(abs(sum) < worst) {
 986       worst = abs(sum);
 987       worstPos = i;
 988     }
 989   }
 990   PrintAndLog("bits:");
 991   PrintAndLog("%s", bits);
 992   PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
 993
 994   if (strcmp(Cmd, "clone")==0) {
 995     GraphTraceLen = 0;
 996     char *s;
 997     for(s = bits; *s; s++) {
 998       int j;
 999       for(j = 0; j < 16; j++) {
1000         GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1001       }
1002     }
1003     RepaintGraphWindow();
1004   }
1005   return 0;
1006 }
1007
1008 //by marshmellow
1009 int CmdLFfind(const char *Cmd)
1010 {
1011   int ans=0;
1012   char cmdp = param_getchar(Cmd, 0);
1013   char testRaw = param_getchar(Cmd, 1);
1014   if (strlen(Cmd) > 2 || cmdp == 'h' || cmdp == 'H') {
1015     PrintAndLog("Usage:  lf search <0|1> [u]");
1016     PrintAndLog("     <use data from Graphbuffer> , if not set, try reading data from tag.");
1017     PrintAndLog("     [Search for Unknown tags] , if not set, reads only known tags.");
1018     PrintAndLog("");
1019     PrintAndLog("    sample: lf search     = try reading data from tag & search for known tags");
1020     PrintAndLog("          : lf search 1   = use data from GraphBuffer & search for known tags");
1021     PrintAndLog("          : lf search u   = try reading data from tag & search for known and unknown tags");
1022     PrintAndLog("          : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1023
1024     return 0;
1025   }
1026
1027   if (!offline && (cmdp != '1')){
1028     ans=CmdLFRead("");
1029     ans=CmdSamples("20000");
1030   } else if (GraphTraceLen < 1000) {
1031     PrintAndLog("Data in Graphbuffer was too small.");
1032     return 0;
1033   }
1034   if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1035   PrintAndLog("NOTE: some demods output possible binary\n  if it finds something that looks like a tag");
1036   PrintAndLog("False Positives ARE possible\n");
1037   PrintAndLog("\nChecking for known tags:\n");
1038   ans=CmdFSKdemodIO("");
1039   if (ans>0) {
1040     PrintAndLog("\nValid IO Prox ID Found!");
1041     return 1;
1042   }
1043   ans=CmdFSKdemodPyramid("");
1044   if (ans>0) {
1045     PrintAndLog("\nValid Pyramid ID Found!");
1046     return 1;
1047   }
1048   ans=CmdFSKdemodParadox("");
1049   if (ans>0) {
1050     PrintAndLog("\nValid Paradox ID Found!");
1051     return 1;
1052   }
1053   ans=CmdFSKdemodAWID("");
1054   if (ans>0) {
1055     PrintAndLog("\nValid AWID ID Found!");
1056     return 1;
1057   }
1058   ans=CmdFSKdemodHID("");
1059   if (ans>0) {
1060     PrintAndLog("\nValid HID Prox ID Found!");
1061     return 1;
1062   }
1063   //add psk and indala
1064   ans=CmdIndalaDecode("");
1065   if (ans>0) {
1066     PrintAndLog("\nValid Indala ID Found!");
1067     return 1;
1068   }
1069   ans=CmdAskEM410xDemod("");
1070   if (ans>0) {
1071     PrintAndLog("\nValid EM410x ID Found!");
1072     return 1;
1073   }
1074   ans=CmdG_Prox_II_Demod("");
1075   if (ans>0) {
1076     PrintAndLog("\nValid G Prox II ID Found!");
1077     return 1;
1078   }
1079   PrintAndLog("\nNo Known Tags Found!\n");
1080   if (testRaw=='u' || testRaw=='U'){
1081     //test unknown tag formats (raw mode)
1082     PrintAndLog("\nChecking for Unknown tags:\n");
1083     ans=CmdDetectClockRate("f");
1084     if (ans != 0){ //fsk
1085       ans=CmdFSKrawdemod("");
1086       if (ans>0) {
1087         PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1088         return 1;
1089       }
1090     }
1091     ans=Cmdaskmandemod("");
1092     if (ans>0) {
1093       PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1094       return 1;
1095     }
1096     ans=CmdPSK1rawDemod("");
1097     if (ans>0) {
1098       PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data psk2rawdemod'");
1099       PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1100       PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1101       return 1;
1102     }
1103     PrintAndLog("\nNo Data Found!\n");
1104   }
1105   return 0;
1106 }
1107
1108 static command_t CommandTable[] =
1109 {
1110   {"help",        CmdHelp,            1, "This help"},
1111   {"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)"},
1112   {"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
1113   {"config",      CmdLFSetConfig,     0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1114   {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
1115   {"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
1116   {"io",          CmdLFIO,                1, "{ ioProx tags... }"},
1117   {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1118   {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1119   {"read",        CmdLFRead,          0, "Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1120   {"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"},
1121   {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1122   {"simask",      CmdLFaskSim,        0, "[clock] [invert <1|0>] [manchester/raw <'m'|'r'>] [msg separator 's'] [d <hexdata>] -- Simulate LF ASK tag from demodbuffer or input"},
1123   {"simfsk",      CmdLFfskSim,        0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] -- Simulate LF FSK tag from demodbuffer or input"},
1124   {"simpsk",      CmdLFpskSim,        0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] -- Simulate LF PSK tag from demodbuffer or input"},
1125   {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1126   //{"simman",      CmdLFSimManchester, 0, "<Clock> <Bitstream> [GAP] Simulate arbitrary Manchester LF tag"},
1127   {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1128   {"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
1129   {"hitag",       CmdLFHitag,         1, "{ Hitag tags and transponders... }"},
1130   {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
1131   {"t55xx",       CmdLFT55XX,         1, "{ T55xx RFIDs... }"},
1132   {"pcf7931",     CmdLFPCF7931,       1, "{PCF7931 RFIDs...}"},
1133   {NULL, NULL, 0, NULL}
1134 };
1135
1136 int CmdLF(const char *Cmd)
1137 {
1138   CmdsParse(CommandTable, Cmd);
1139   return 0;
1140 }
1141
1142 int CmdHelp(const char *Cmd)
1143 {
1144   CmdsHelp(CommandTable);
1145   return 0;
1146 }