cvs.zerfleddert.de Git - proxmark3-svn/blob - armsrc/mifarecmd.c

   1 //-----------------------------------------------------------------------------
   2 // Merlok - June 2011, 2012
   3 // Gerhard de Koning Gans - May 2008
   4 // Hagen Fritsch - June 2010
   5 // Midnitesnake - Dec 2013
   6 // Andy Davies  - Apr 2014
   7 // Iceman - May 2014
   8 //
   9 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
  10 // at your option, any later version. See the LICENSE.txt file for the text of
  11 // the license.
  12 //-----------------------------------------------------------------------------
  13 // Routines to support ISO 14443 type A.
  14 //-----------------------------------------------------------------------------
  15
  16 #include "mifarecmd.h"
  17 #include "apps.h"
  18 #include "util.h"
  19 #include "crc.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // Select, Authenticate, Read a MIFARE tag.
  23 // read block
  24 //-----------------------------------------------------------------------------
  25 void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
  26 {
  27   // params
  28         uint8_t blockNo = arg0;
  29         uint8_t keyType = arg1;
  30         uint64_t ui64Key = 0;
  31         ui64Key = bytes_to_num(datain, 6);
  32
  33         // variables
  34         byte_t isOK = 0;
  35         byte_t dataoutbuf[16];
  36         uint8_t uid[10];
  37         uint32_t cuid;
  38         struct Crypto1State mpcs = {0, 0};
  39         struct Crypto1State *pcs;
  40         pcs = &mpcs;
  41
  42         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
  43
  44         clear_trace();
  45
  46         LED_A_ON();
  47         LED_B_OFF();
  48         LED_C_OFF();
  49
  50         while (true) {
  51                 if(!iso14443a_select_card(uid, NULL, &cuid)) {
  52                         if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
  53                         break;
  54                 };
  55
  56                 if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
  57                         if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
  58                         break;
  59                 };
  60
  61                 if(mifare_classic_readblock(pcs, cuid, blockNo, dataoutbuf)) {
  62                         if (MF_DBGLEVEL >= 1)   Dbprintf("Read block error");
  63                         break;
  64                 };
  65
  66                 if(mifare_classic_halt(pcs, cuid)) {
  67                         if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
  68                         break;
  69                 };
  70
  71                 isOK = 1;
  72                 break;
  73         }
  74
  75         //  ----------------------------- crypto1 destroy
  76         crypto1_destroy(pcs);
  77
  78         if (MF_DBGLEVEL >= 2)   DbpString("READ BLOCK FINISHED");
  79
  80         LED_B_ON();
  81         cmd_send(CMD_ACK,isOK,0,0,dataoutbuf,16);
  82         LED_B_OFF();
  83
  84         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
  85         LEDsoff();
  86 }
  87
  88 void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
  89
  90         bool turnOffField = (arg0 == 1);
  91
  92         LED_A_ON(); LED_B_OFF(); LED_C_OFF();
  93
  94         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
  95
  96         clear_trace();
  97
  98         if(!iso14443a_select_card(NULL, NULL, NULL)) {
  99                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
 100                 OnError(0);
 101                 return;
 102         };
 103
 104         if(!mifare_ultra_auth(keybytes)){
 105                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication failed");
 106                 OnError(1);
 107                 return;
 108         }
 109
 110         if (turnOffField) {
 111                 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 112                 LEDsoff();
 113         }
 114         cmd_send(CMD_ACK,1,0,0,0,0);
 115 }
 116
 117 // Arg0 = BlockNo,
 118 // Arg1 = UsePwd bool
 119 // datain = PWD bytes,
 120 void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 121 {
 122         uint8_t blockNo = arg0;
 123         byte_t dataout[16] = {0x00};
 124         bool useKey = (arg1 == 1); //UL_C
 125         bool usePwd = (arg1 == 2); //UL_EV1/NTAG
 126
 127         LEDsoff();
 128         LED_A_ON();
 129         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 130
 131         clear_trace();
 132
 133         int len = iso14443a_select_card(NULL, NULL, NULL);
 134         if(!len) {
 135                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%02X)",len);
 136                 OnError(1);
 137                 return;
 138         }
 139
 140         // UL-C authentication
 141         if ( useKey ) {
 142                 uint8_t key[16] = {0x00};
 143                 memcpy(key, datain, sizeof(key) );
 144
 145                 if ( !mifare_ultra_auth(key) ) {
 146                         OnError(1);
 147                         return;
 148                 }
 149         }
 150
 151         // UL-EV1 / NTAG authentication
 152         if ( usePwd ) {
 153                 uint8_t pwd[4] = {0x00};
 154                 memcpy(pwd, datain, 4);
 155                 uint8_t pack[4] = {0,0,0,0};
 156                 if (!mifare_ul_ev1_auth(pwd, pack)) {
 157                         OnError(1);
 158                         return;
 159                 }
 160         }
 161
 162         if( mifare_ultra_readblock(blockNo, dataout) ) {
 163                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block error");
 164                 OnError(2);
 165                 return;
 166         }
 167
 168         if( mifare_ultra_halt() ) {
 169                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Halt error");
 170                 OnError(3);
 171                 return;
 172         }
 173
 174     cmd_send(CMD_ACK,1,0,0,dataout,16);
 175         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 176         LEDsoff();
 177 }
 178
 179 //-----------------------------------------------------------------------------
 180 // Select, Authenticate, Read a MIFARE tag.
 181 // read sector (data = 4 x 16 bytes = 64 bytes, or 16 x 16 bytes = 256 bytes)
 182 //-----------------------------------------------------------------------------
 183 void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 184 {
 185   // params
 186         uint8_t sectorNo = arg0;
 187         uint8_t keyType = arg1;
 188         uint64_t ui64Key = 0;
 189         ui64Key = bytes_to_num(datain, 6);
 190
 191         // variables
 192         byte_t isOK = 0;
 193         byte_t dataoutbuf[16 * 16];
 194         uint8_t uid[10];
 195         uint32_t cuid;
 196         struct Crypto1State mpcs = {0, 0};
 197         struct Crypto1State *pcs;
 198         pcs = &mpcs;
 199
 200         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 201
 202         clear_trace();
 203
 204         LED_A_ON();
 205         LED_B_OFF();
 206         LED_C_OFF();
 207
 208         isOK = 1;
 209         if(!iso14443a_select_card(uid, NULL, &cuid)) {
 210                 isOK = 0;
 211                 if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 212         }
 213
 214
 215         if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {
 216                 isOK = 0;
 217                 if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
 218         }
 219
 220         for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {
 221                 if(mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf + 16 * blockNo)) {
 222                         isOK = 0;
 223                         if (MF_DBGLEVEL >= 1)   Dbprintf("Read sector %2d block %2d error", sectorNo, blockNo);
 224                         break;
 225                 }
 226         }
 227
 228         if(mifare_classic_halt(pcs, cuid)) {
 229                 if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 230         }
 231
 232         //  ----------------------------- crypto1 destroy
 233         crypto1_destroy(pcs);
 234
 235         if (MF_DBGLEVEL >= 2) DbpString("READ SECTOR FINISHED");
 236
 237         LED_B_ON();
 238         cmd_send(CMD_ACK,isOK,0,0,dataoutbuf,16*NumBlocksPerSector(sectorNo));
 239         LED_B_OFF();
 240
 241         // Thats it...
 242         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 243         LEDsoff();
 244 }
 245
 246 // arg0 = blockNo (start)
 247 // arg1 = Pages (number of blocks)
 248 // arg2 = useKey
 249 // datain = KEY bytes
 250 void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 251 {
 252         LEDsoff();
 253         LED_A_ON();
 254         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 255
 256         // free eventually allocated BigBuf memory
 257         BigBuf_free();
 258         clear_trace();
 259
 260         // params
 261         uint8_t blockNo = arg0;
 262         uint16_t blocks = arg1;
 263         bool useKey = (arg2 == 1); //UL_C
 264         bool usePwd = (arg2 == 2); //UL_EV1/NTAG
 265         uint32_t countblocks = 0;
 266         uint8_t *dataout = BigBuf_malloc(CARD_MEMORY_SIZE);
 267         if (dataout == NULL){
 268                 Dbprintf("out of memory");
 269                 OnError(1);
 270                 return;
 271         }
 272
 273         int len = iso14443a_select_card(NULL, NULL, NULL);
 274         if (!len) {
 275                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%d)",len);
 276                 OnError(1);
 277                 return;
 278         }
 279
 280         // UL-C authentication
 281         if ( useKey ) {
 282                 uint8_t key[16] = {0x00};
 283                 memcpy(key, datain, sizeof(key) );
 284
 285                 if ( !mifare_ultra_auth(key) ) {
 286                         OnError(1);
 287                         return;
 288                 }
 289         }
 290
 291         // UL-EV1 / NTAG authentication
 292         if (usePwd) {
 293                 uint8_t pwd[4] = {0x00};
 294                 memcpy(pwd, datain, sizeof(pwd));
 295                 uint8_t pack[4] = {0,0,0,0};
 296
 297                 if (!mifare_ul_ev1_auth(pwd, pack)){
 298                         OnError(1);
 299                         return;
 300                 }
 301         }
 302
 303         for (int i = 0; i < blocks; i++){
 304                 if ((i*4) + 4 >= CARD_MEMORY_SIZE) {
 305                         Dbprintf("Data exceeds buffer!!");
 306                         break;
 307                 }
 308
 309                 len = mifare_ultra_readblock(blockNo + i, dataout + 4 * i);
 310
 311                 if (len) {
 312                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block %d error",i);
 313                         // if no blocks read - error out
 314                         if (i==0){
 315                                 OnError(2);
 316                         return;
 317                         } else {
 318                                 //stop at last successful read block and return what we got
 319                                 break;
 320                         }
 321                 } else {
 322                         countblocks++;
 323                 }
 324         }
 325
 326         len = mifare_ultra_halt();
 327         if (len) {
 328                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Halt error");
 329                 OnError(3);
 330                 return;
 331         }
 332
 333         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Blocks read %d", countblocks);
 334
 335         countblocks *= 4;
 336
 337         cmd_send(CMD_ACK, 1, countblocks, BigBuf_max_traceLen(), 0, 0);
 338         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 339         LEDsoff();
 340         BigBuf_free();
 341 }
 342
 343 //-----------------------------------------------------------------------------
 344 // Select, Authenticate, Write a MIFARE tag.
 345 // read block
 346 //-----------------------------------------------------------------------------
 347 void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 348 {
 349         // params
 350         uint8_t blockNo = arg0;
 351         uint8_t keyType = arg1;
 352         uint64_t ui64Key = 0;
 353         byte_t blockdata[16];
 354
 355         ui64Key = bytes_to_num(datain, 6);
 356         memcpy(blockdata, datain + 10, 16);
 357
 358         // variables
 359         byte_t isOK = 0;
 360         uint8_t uid[10];
 361         uint32_t cuid;
 362         struct Crypto1State mpcs = {0, 0};
 363         struct Crypto1State *pcs;
 364         pcs = &mpcs;
 365
 366         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 367
 368         clear_trace();
 369
 370         LED_A_ON();
 371         LED_B_OFF();
 372         LED_C_OFF();
 373
 374         while (true) {
 375                         if(!iso14443a_select_card(uid, NULL, &cuid)) {
 376                         if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 377                         break;
 378                 };
 379
 380                 if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
 381                         if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
 382                         break;
 383                 };
 384
 385                 if(mifare_classic_writeblock(pcs, cuid, blockNo, blockdata)) {
 386                         if (MF_DBGLEVEL >= 1)   Dbprintf("Write block error");
 387                         break;
 388                 };
 389
 390                 if(mifare_classic_halt(pcs, cuid)) {
 391                         if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 392                         break;
 393                 };
 394
 395                 isOK = 1;
 396                 break;
 397         }
 398
 399         //  ----------------------------- crypto1 destroy
 400         crypto1_destroy(pcs);
 401
 402         if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");
 403
 404         LED_B_ON();
 405         cmd_send(CMD_ACK,isOK,0,0,0,0);
 406         LED_B_OFF();
 407
 408
 409         // Thats it...
 410         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 411         LEDsoff();
 412 }
 413
 414 /* // Command not needed but left for future testing
 415 void MifareUWriteBlockCompat(uint8_t arg0, uint8_t *datain)
 416 {
 417         uint8_t blockNo = arg0;
 418         byte_t blockdata[16] = {0x00};
 419
 420         memcpy(blockdata, datain, 16);
 421
 422         uint8_t uid[10] = {0x00};
 423
 424         LED_A_ON(); LED_B_OFF(); LED_C_OFF();
 425
 426         clear_trace();
 427         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 428
 429         if(!iso14443a_select_card(uid, NULL, NULL)) {
 430                 if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 431                 OnError(0);
 432                 return;
 433         };
 434
 435         if(mifare_ultra_writeblock_compat(blockNo, blockdata)) {
 436                 if (MF_DBGLEVEL >= 1)   Dbprintf("Write block error");
 437                 OnError(0);
 438                 return; };
 439
 440         if(mifare_ultra_halt()) {
 441                 if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 442                 OnError(0);
 443                 return;
 444         };
 445
 446         if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");
 447
 448         cmd_send(CMD_ACK,1,0,0,0,0);
 449         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 450         LEDsoff();
 451 }
 452 */
 453
 454 // Arg0   : Block to write to.
 455 // Arg1   : 0 = use no authentication.
 456 //          1 = use 0x1A authentication.
 457 //          2 = use 0x1B authentication.
 458 // datain : 4 first bytes is data to be written.
 459 //        : 4/16 next bytes is authentication key.
 460 void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 461 {
 462         uint8_t blockNo = arg0;
 463         bool useKey = (arg1 == 1); //UL_C
 464         bool usePwd = (arg1 == 2); //UL_EV1/NTAG
 465         byte_t blockdata[4] = {0x00};
 466
 467         memcpy(blockdata, datain,4);
 468
 469         LEDsoff();
 470         LED_A_ON();
 471         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 472
 473         clear_trace();
 474
 475         if(!iso14443a_select_card(NULL, NULL, NULL)) {
 476                 if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 477                 OnError(0);
 478                 return;
 479         };
 480
 481         // UL-C authentication
 482         if ( useKey ) {
 483                 uint8_t key[16] = {0x00};
 484                 memcpy(key, datain+4, sizeof(key) );
 485
 486                 if ( !mifare_ultra_auth(key) ) {
 487                         OnError(1);
 488                         return;
 489                 }
 490         }
 491
 492         // UL-EV1 / NTAG authentication
 493         if (usePwd) {
 494                 uint8_t pwd[4] = {0x00};
 495                 memcpy(pwd, datain+4, 4);
 496                 uint8_t pack[4] = {0,0,0,0};
 497                 if (!mifare_ul_ev1_auth(pwd, pack)) {
 498                         OnError(1);
 499                         return;
 500                 }
 501         }
 502
 503         if(mifare_ultra_writeblock(blockNo, blockdata)) {
 504                 if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 505                 OnError(0);
 506                 return;
 507         };
 508
 509         if(mifare_ultra_halt()) {
 510                 if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");
 511                 OnError(0);
 512                 return;
 513         };
 514
 515         if (MF_DBGLEVEL >= 2) DbpString("WRITE BLOCK FINISHED");
 516
 517         cmd_send(CMD_ACK,1,0,0,0,0);
 518         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 519         LEDsoff();
 520 }
 521
 522 void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 523
 524         uint8_t pwd[16] = {0x00};
 525         byte_t blockdata[4] = {0x00};
 526
 527         memcpy(pwd, datain, 16);
 528
 529         LED_A_ON(); LED_B_OFF(); LED_C_OFF();
 530         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 531
 532         clear_trace();
 533
 534         if(!iso14443a_select_card(NULL, NULL, NULL)) {
 535                 if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 536                 OnError(0);
 537                 return;
 538         };
 539
 540         blockdata[0] = pwd[7];
 541         blockdata[1] = pwd[6];
 542         blockdata[2] = pwd[5];
 543         blockdata[3] = pwd[4];
 544         if(mifare_ultra_writeblock( 44, blockdata)) {
 545                 if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 546                 OnError(44);
 547                 return;
 548         };
 549
 550         blockdata[0] = pwd[3];
 551         blockdata[1] = pwd[2];
 552         blockdata[2] = pwd[1];
 553         blockdata[3] = pwd[0];
 554         if(mifare_ultra_writeblock( 45, blockdata)) {
 555                 if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 556                 OnError(45);
 557                 return;
 558         };
 559
 560         blockdata[0] = pwd[15];
 561         blockdata[1] = pwd[14];
 562         blockdata[2] = pwd[13];
 563         blockdata[3] = pwd[12];
 564         if(mifare_ultra_writeblock( 46, blockdata)) {
 565                 if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 566                 OnError(46);
 567                 return;
 568         };
 569
 570         blockdata[0] = pwd[11];
 571         blockdata[1] = pwd[10];
 572         blockdata[2] = pwd[9];
 573         blockdata[3] = pwd[8];
 574         if(mifare_ultra_writeblock( 47, blockdata)) {
 575                 if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 576                 OnError(47);
 577                 return;
 578         };
 579
 580         if(mifare_ultra_halt()) {
 581                 if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");
 582                 OnError(0);
 583                 return;
 584         };
 585
 586         cmd_send(CMD_ACK,1,0,0,0,0);
 587         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 588         LEDsoff();
 589 }
 590
 591 // Return 1 if the nonce is invalid else return 0
 592 int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, uint8_t *parity) {
 593         return ((oddparity((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \
 594         (oddparity((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \
 595         (oddparity((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0;
 596 }
 597
 598
 599 //-----------------------------------------------------------------------------
 600 // MIFARE nested authentication.
 601 //
 602 //-----------------------------------------------------------------------------
 603 void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *datain)
 604 {
 605         // params
 606         uint8_t blockNo = arg0 & 0xff;
 607         uint8_t keyType = (arg0 >> 8) & 0xff;
 608         uint8_t targetBlockNo = arg1 & 0xff;
 609         uint8_t targetKeyType = (arg1 >> 8) & 0xff;
 610         uint64_t ui64Key = 0;
 611
 612         ui64Key = bytes_to_num(datain, 6);
 613
 614         // variables
 615         uint16_t rtr, i, j, len;
 616         uint16_t davg;
 617         static uint16_t dmin, dmax;
 618         uint8_t uid[10];
 619         uint32_t cuid, nt1, nt2, nttmp, nttest, ks1;
 620         uint8_t par[1];
 621         uint32_t target_nt[2], target_ks[2];
 622
 623         uint8_t par_array[4];
 624         uint16_t ncount = 0;
 625         struct Crypto1State mpcs = {0, 0};
 626         struct Crypto1State *pcs;
 627         pcs = &mpcs;
 628         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 629
 630         uint32_t auth1_time, auth2_time;
 631         static uint16_t delta_time;
 632
 633         LED_A_ON();
 634         LED_C_OFF();
 635         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 636
 637         // free eventually allocated BigBuf memory
 638         BigBuf_free();
 639
 640         if (calibrate) clear_trace();
 641         set_tracing(true);
 642
 643         // statistics on nonce distance
 644         int16_t isOK = 0;
 645         #define NESTED_MAX_TRIES 12
 646         uint16_t unsuccessfull_tries = 0;
 647         if (calibrate) {        // for first call only. Otherwise reuse previous calibration
 648                 LED_B_ON();
 649                 WDT_HIT();
 650
 651                 davg = dmax = 0;
 652                 dmin = 2000;
 653                 delta_time = 0;
 654
 655                 for (rtr = 0; rtr < 17; rtr++) {
 656
 657                         // Test if the action was cancelled
 658                         if(BUTTON_PRESS()) {
 659                                 isOK = -2;
 660                                 break;
 661                         }
 662
 663                         // prepare next select. No need to power down the card.
 664                         if(mifare_classic_halt(pcs, cuid)) {
 665                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Halt error");
 666                                 rtr--;
 667                                 continue;
 668                         }
 669
 670                         if(!iso14443a_select_card(uid, NULL, &cuid)) {
 671                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Can't select card");
 672                                 rtr--;
 673                                 continue;
 674                         };
 675
 676                         auth1_time = 0;
 677                         if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time)) {
 678                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth1 error");
 679                                 rtr--;
 680                                 continue;
 681                         };
 682
 683                         if (delta_time) {
 684                                 auth2_time = auth1_time + delta_time;
 685                         } else {
 686                                 auth2_time = 0;
 687                         }
 688                         if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2, &auth2_time)) {
 689                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth2 error");
 690                                 rtr--;
 691                                 continue;
 692                         };
 693
 694                         nttmp = prng_successor(nt1, 100);                               //NXP Mifare is typical around 840,but for some unlicensed/compatible mifare card this can be 160
 695                         for (i = 101; i < 1200; i++) {
 696                                 nttmp = prng_successor(nttmp, 1);
 697                                 if (nttmp == nt2) break;
 698                         }
 699
 700                         if (i != 1200) {
 701                                 if (rtr != 0) {
 702                                         davg += i;
 703                                         dmin = MIN(dmin, i);
 704                                         dmax = MAX(dmax, i);
 705                                 }
 706                                 else {
 707                                         delta_time = auth2_time - auth1_time + 32;  // allow some slack for proper timing
 708                                 }
 709                                 if (MF_DBGLEVEL >= 3) Dbprintf("Nested: calibrating... ntdist=%d", i);
 710                         } else {
 711                                 unsuccessfull_tries++;
 712                                 if (unsuccessfull_tries > NESTED_MAX_TRIES) {   // card isn't vulnerable to nested attack (random numbers are not predictable)
 713                                         isOK = -3;
 714                                 }
 715                         }
 716                 }
 717
 718                 davg = (davg + (rtr - 1)/2) / (rtr - 1);
 719
 720                 if (MF_DBGLEVEL >= 3) Dbprintf("rtr=%d isOK=%d min=%d max=%d avg=%d, delta_time=%d", rtr, isOK, dmin, dmax, davg, delta_time);
 721
 722                 dmin = davg - 2;
 723                 dmax = davg + 2;
 724
 725                 LED_B_OFF();
 726         }
 727 //  -------------------------------------------------------------------------------------------------
 728
 729         LED_C_ON();
 730
 731         //  get crypted nonces for target sector
 732         for(i=0; i < 2 && !isOK; i++) { // look for exactly two different nonces
 733
 734                 target_nt[i] = 0;
 735                 while(target_nt[i] == 0) { // continue until we have an unambiguous nonce
 736
 737                         // prepare next select. No need to power down the card.
 738                         if(mifare_classic_halt(pcs, cuid)) {
 739                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Halt error");
 740                                 continue;
 741                         }
 742
 743                         if(!iso14443a_select_card(uid, NULL, &cuid)) {
 744                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Can't select card");
 745                                 continue;
 746                         };
 747
 748                         auth1_time = 0;
 749                         if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time)) {
 750                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth1 error");
 751                                 continue;
 752                         };
 753
 754                         // nested authentication
 755                         auth2_time = auth1_time + delta_time;
 756                         len = mifare_sendcmd_short(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, par, &auth2_time);
 757                         if (len != 4) {
 758                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth2 error len=%d", len);
 759                                 continue;
 760                         };
 761
 762                         nt2 = bytes_to_num(receivedAnswer, 4);
 763                         if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: Testing nt1=%08x nt2enc=%08x nt2par=%02x", i+1, nt1, nt2, par[0]);
 764
 765                         // Parity validity check
 766                         for (j = 0; j < 4; j++) {
 767                                 par_array[j] = (oddparity(receivedAnswer[j]) != ((par[0] >> (7-j)) & 0x01));
 768                         }
 769
 770                         ncount = 0;
 771                         nttest = prng_successor(nt1, dmin - 1);
 772                         for (j = dmin; j < dmax + 1; j++) {
 773                                 nttest = prng_successor(nttest, 1);
 774                                 ks1 = nt2 ^ nttest;
 775
 776                                 if (valid_nonce(nttest, nt2, ks1, par_array)){
 777                                         if (ncount > 0) {               // we are only interested in disambiguous nonces, try again
 778                                                 if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: dismissed (ambigous), ntdist=%d", i+1, j);
 779                                                 target_nt[i] = 0;
 780                                                 break;
 781                                         }
 782                                         target_nt[i] = nttest;
 783                                         target_ks[i] = ks1;
 784                                         ncount++;
 785                                         if (i == 1 && target_nt[1] == target_nt[0]) { // we need two different nonces
 786                                                 target_nt[i] = 0;
 787                                                 if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#2: dismissed (= nonce#1), ntdist=%d", j);
 788                                                 break;
 789                                         }
 790                                         if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: valid, ntdist=%d", i+1, j);
 791                                 }
 792                         }
 793                         if (target_nt[i] == 0 && j == dmax+1 && MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: dismissed (all invalid)", i+1);
 794                 }
 795         }
 796
 797         LED_C_OFF();
 798
 799         //  ----------------------------- crypto1 destroy
 800         crypto1_destroy(pcs);
 801
 802         byte_t buf[4 + 4 * 4];
 803         memcpy(buf, &cuid, 4);
 804         memcpy(buf+4, &target_nt[0], 4);
 805         memcpy(buf+8, &target_ks[0], 4);
 806         memcpy(buf+12, &target_nt[1], 4);
 807         memcpy(buf+16, &target_ks[1], 4);
 808
 809         LED_B_ON();
 810         cmd_send(CMD_ACK, isOK, 0, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));
 811         LED_B_OFF();
 812
 813         if (MF_DBGLEVEL >= 3)   DbpString("NESTED FINISHED");
 814
 815         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 816         LEDsoff();
 817         set_tracing(FALSE);
 818 }
 819
 820 //-----------------------------------------------------------------------------
 821 // MIFARE check keys. key count up to 85.
 822 //
 823 //-----------------------------------------------------------------------------
 824 void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 825 {
 826   // params
 827         uint8_t blockNo = arg0 & 0xff;
 828         uint8_t keyType = (arg0 >> 8) & 0xff;
 829         bool clearTrace = arg1;
 830         uint8_t keyCount = arg2;
 831         uint64_t ui64Key = 0;
 832
 833         // variables
 834         int i;
 835         byte_t isOK = 0;
 836         uint8_t uid[10];
 837         uint32_t cuid;
 838         struct Crypto1State mpcs = {0, 0};
 839         struct Crypto1State *pcs;
 840         pcs = &mpcs;
 841
 842         // clear debug level
 843         int OLD_MF_DBGLEVEL = MF_DBGLEVEL;
 844         MF_DBGLEVEL = MF_DBG_NONE;
 845
 846         LED_A_ON();
 847         LED_B_OFF();
 848         LED_C_OFF();
 849         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 850
 851         if (clearTrace) clear_trace();
 852         set_tracing(TRUE);
 853
 854         for (i = 0; i < keyCount; i++) {
 855                 if(mifare_classic_halt(pcs, cuid)) {
 856                         if (MF_DBGLEVEL >= 1)   Dbprintf("ChkKeys: Halt error");
 857                 }
 858
 859                 if(!iso14443a_select_card(uid, NULL, &cuid)) {
 860                         if (OLD_MF_DBGLEVEL >= 1)       Dbprintf("ChkKeys: Can't select card");
 861                         break;
 862                 };
 863
 864                 ui64Key = bytes_to_num(datain + i * 6, 6);
 865                 if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
 866                         continue;
 867                 };
 868
 869                 isOK = 1;
 870                 break;
 871         }
 872
 873         //  ----------------------------- crypto1 destroy
 874         crypto1_destroy(pcs);
 875
 876         LED_B_ON();
 877     cmd_send(CMD_ACK,isOK,0,0,datain + i * 6,6);
 878         LED_B_OFF();
 879
 880         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 881         LEDsoff();
 882         set_tracing(FALSE);
 883
 884         // restore debug level
 885         MF_DBGLEVEL = OLD_MF_DBGLEVEL;
 886 }
 887
 888 //-----------------------------------------------------------------------------
 889 // MIFARE commands set debug level
 890 //
 891 //-----------------------------------------------------------------------------
 892 void MifareSetDbgLvl(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 893         MF_DBGLEVEL = arg0;
 894         Dbprintf("Debug level: %d", MF_DBGLEVEL);
 895 }
 896
 897 //-----------------------------------------------------------------------------
 898 // Work with emulator memory
 899 //
 900 // Note: we call FpgaDownloadAndGo(FPGA_BITSTREAM_HF) here although FPGA is not
 901 // involved in dealing with emulator memory. But if it is called later, it might
 902 // destroy the Emulator Memory.
 903 //-----------------------------------------------------------------------------
 904
 905 void MifareEMemClr(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 906         FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 907         emlClearMem();
 908 }
 909
 910 void MifareEMemSet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 911         FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 912         //emlSetMem(datain, arg0, arg1); // data, block num, blocks count
 913         emlSetMem_xt(datain, arg0, arg1, arg2); // data, block num, blocks count, block byte width
 914 }
 915
 916 void MifareEMemGet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 917         FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 918         byte_t buf[USB_CMD_DATA_SIZE];
 919         emlGetMem(buf, arg0, arg1); // data, block num, blocks count (max 4)
 920
 921         LED_B_ON();
 922         cmd_send(CMD_ACK,arg0,arg1,0,buf,USB_CMD_DATA_SIZE);
 923         LED_B_OFF();
 924 }
 925
 926 //-----------------------------------------------------------------------------
 927 // Load a card into the emulator memory
 928 //
 929 //-----------------------------------------------------------------------------
 930 void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 931         uint8_t numSectors = arg0;
 932         uint8_t keyType = arg1;
 933         uint64_t ui64Key = 0;
 934         uint32_t cuid;
 935         struct Crypto1State mpcs = {0, 0};
 936         struct Crypto1State *pcs;
 937         pcs = &mpcs;
 938
 939         // variables
 940         byte_t dataoutbuf[16];
 941         byte_t dataoutbuf2[16];
 942         uint8_t uid[10];
 943
 944         LED_A_ON();
 945         LED_B_OFF();
 946         LED_C_OFF();
 947         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 948
 949         clear_trace();
 950         set_tracing(TRUE);
 951
 952         bool isOK = true;
 953
 954         if(!iso14443a_select_card(uid, NULL, &cuid)) {
 955                 isOK = false;
 956                 if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 957         }
 958
 959         for (uint8_t sectorNo = 0; isOK && sectorNo < numSectors; sectorNo++) {
 960                 ui64Key = emlGetKey(sectorNo, keyType);
 961                 if (sectorNo == 0){
 962                         if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {
 963                                 isOK = false;
 964                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Sector[%2d]. Auth error", sectorNo);
 965                                 break;
 966                         }
 967                 } else {
 968                         if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_NESTED)) {
 969                                 isOK = false;
 970                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Sector[%2d]. Auth nested error", sectorNo);
 971                                 break;
 972                         }
 973                 }
 974
 975                 for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {
 976                         if(isOK && mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf)) {
 977                                 isOK = false;
 978                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Error reading sector %2d block %2d", sectorNo, blockNo);
 979                                 break;
 980                         };
 981                         if (isOK) {
 982                                 if (blockNo < NumBlocksPerSector(sectorNo) - 1) {
 983                                         emlSetMem(dataoutbuf, FirstBlockOfSector(sectorNo) + blockNo, 1);
 984                                 } else {        // sector trailer, keep the keys, set only the AC
 985                                         emlGetMem(dataoutbuf2, FirstBlockOfSector(sectorNo) + blockNo, 1);
 986                                         memcpy(&dataoutbuf2[6], &dataoutbuf[6], 4);
 987                                         emlSetMem(dataoutbuf2,  FirstBlockOfSector(sectorNo) + blockNo, 1);
 988                                 }
 989                         }
 990                 }
 991
 992         }
 993
 994         if(mifare_classic_halt(pcs, cuid)) {
 995                 if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 996         };
 997
 998         //  ----------------------------- crypto1 destroy
 999         crypto1_destroy(pcs);
1000
1001         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1002         LEDsoff();
1003
1004         if (MF_DBGLEVEL >= 2) DbpString("EMUL FILL SECTORS FINISHED");
1005
1006         set_tracing(FALSE);
1007 }
1008
1009
1010 //-----------------------------------------------------------------------------
1011 // Work with "magic Chinese" card (email him: ouyangweidaxian@live.cn)
1012 //
1013 //-----------------------------------------------------------------------------
1014 void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
1015
1016   // params
1017         uint8_t needWipe = arg0;
1018         // bit 0 - need get UID
1019         // bit 1 - need wupC
1020         // bit 2 - need HALT after sequence
1021         // bit 3 - need init FPGA and field before sequence
1022         // bit 4 - need reset FPGA and LED
1023         uint8_t workFlags = arg1;
1024         uint8_t blockNo = arg2;
1025
1026         // card commands
1027         uint8_t wupC1[]       = { 0x40 };
1028         uint8_t wupC2[]       = { 0x43 };
1029         uint8_t wipeC[]       = { 0x41 };
1030
1031         // variables
1032         byte_t isOK = 0;
1033         uint8_t uid[10] = {0x00};
1034         uint8_t d_block[18] = {0x00};
1035         uint32_t cuid;
1036
1037         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
1038         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
1039
1040         // reset FPGA and LED
1041         if (workFlags & 0x08) {
1042                 LED_A_ON();
1043                 LED_B_OFF();
1044                 LED_C_OFF();
1045                 iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
1046
1047                 clear_trace();
1048                 set_tracing(TRUE);
1049         }
1050
1051         while (true) {
1052
1053                 // get UID from chip
1054                 if (workFlags & 0x01) {
1055                         if(!iso14443a_select_card(uid, NULL, &cuid)) {
1056                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
1057                                 //break;
1058                         };
1059
1060                         if(mifare_classic_halt(NULL, cuid)) {
1061                                 if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
1062                                 //break;
1063                         };
1064                 };
1065
1066                 // reset chip
1067                 if (needWipe){
1068                         ReaderTransmitBitsPar(wupC1,7,0, NULL);
1069                         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1070                                 if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
1071                                 break;
1072                         };
1073
1074                         ReaderTransmit(wipeC, sizeof(wipeC), NULL);
1075                         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1076                                 if (MF_DBGLEVEL >= 1)   Dbprintf("wipeC error");
1077                                 break;
1078                         };
1079
1080                         if(mifare_classic_halt(NULL, cuid)) {
1081                                 if (MF_DBGLEVEL >= 4)   Dbprintf("INFO - Tag answered the 'Halt' command");
1082                                 break;
1083                         };
1084                 };
1085
1086                 // write block
1087                 if (workFlags & 0x02) {
1088                         ReaderTransmitBitsPar(wupC1,7,0, NULL);
1089                         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1090                                 if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
1091                                 break;
1092                         };
1093
1094                         ReaderTransmit(wupC2, sizeof(wupC2), NULL);
1095                         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1096                                 if (MF_DBGLEVEL >= 1)   Dbprintf("wupC2 error");
1097                                 break;
1098                         };
1099                 }
1100
1101                 if ((mifare_sendcmd_short(NULL, 0, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 1) || (receivedAnswer[0] != 0x0a)) {
1102                         if (MF_DBGLEVEL >= 1)   Dbprintf("write block send command error");
1103                         break;
1104                 };
1105
1106                 memcpy(d_block, datain, 16);
1107                 AppendCrc14443a(d_block, 16);
1108
1109                 ReaderTransmit(d_block, sizeof(d_block), NULL);
1110                 if ((ReaderReceive(receivedAnswer, receivedAnswerPar) != 1) || (receivedAnswer[0] != 0x0a)) {
1111                         if (MF_DBGLEVEL >= 1)   Dbprintf("write block send data error");
1112                         break;
1113                 };
1114
1115                 if (workFlags & 0x04) {
1116                         if (mifare_classic_halt(NULL, cuid)) {
1117                                 if (MF_DBGLEVEL >= 4)   Dbprintf("INFO - Tag answered the 'Halt' command");
1118                                 break;
1119                         };
1120                 }
1121
1122                 isOK = 1;
1123                 break;
1124         }
1125
1126         LED_B_ON();
1127         cmd_send(CMD_ACK,isOK,0,0,uid,4);
1128         LED_B_OFF();
1129
1130         if ((workFlags & 0x10) || (!isOK)) {
1131                 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1132                 LEDsoff();
1133                 set_tracing(FALSE);
1134         }
1135 }
1136
1137
1138 void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
1139
1140   // params
1141         // bit 1 - need wupC
1142         // bit 2 - need HALT after sequence
1143         // bit 3 - need init FPGA and field before sequence
1144         // bit 4 - need reset FPGA and LED
1145         // bit 5 - need to set datain instead of issuing USB reply (called via ARM for StandAloneMode14a)
1146         uint8_t workFlags = arg0;
1147         uint8_t blockNo = arg2;
1148
1149         // card commands
1150         uint8_t wupC1[]       = { 0x40 };
1151         uint8_t wupC2[]       = { 0x43 };
1152
1153         // variables
1154         byte_t isOK = 0;
1155         uint8_t data[18] = {0x00};
1156         uint32_t cuid = 0;
1157
1158         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
1159         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
1160
1161         if (workFlags & 0x08) {
1162                 LED_A_ON();
1163                 LED_B_OFF();
1164                 LED_C_OFF();
1165                 iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
1166
1167                 clear_trace();
1168                 set_tracing(TRUE);
1169         }
1170
1171         while (true) {
1172                 if (workFlags & 0x02) {
1173                         ReaderTransmitBitsPar(wupC1,7,0, NULL);
1174                         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1175                                 if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
1176                                 break;
1177                         };
1178
1179                         ReaderTransmit(wupC2, sizeof(wupC2), NULL);
1180                         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1181                                 if (MF_DBGLEVEL >= 1)   Dbprintf("wupC2 error");
1182                                 break;
1183                         };
1184                 }
1185
1186                 // read block
1187                 if ((mifare_sendcmd_short(NULL, 0, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 18)) {
1188                         if (MF_DBGLEVEL >= 1)   Dbprintf("read block send command error");
1189                         break;
1190                 };
1191                 memcpy(data, receivedAnswer, 18);
1192
1193                 if (workFlags & 0x04) {
1194                         if (mifare_classic_halt(NULL, cuid)) {
1195                                 if (MF_DBGLEVEL >= 4)   Dbprintf("INFO - Tag answered the 'Halt' command");
1196                                 break;
1197                         };
1198                 }
1199
1200                 isOK = 1;
1201                 break;
1202         }
1203
1204         LED_B_ON();
1205         if (workFlags & 0x20) {
1206                 if (isOK)
1207                         memcpy(datain, data, 18);
1208         }
1209         else
1210         cmd_send(CMD_ACK,isOK,0,0,data,18);
1211         LED_B_OFF();
1212
1213         if ((workFlags & 0x10) || (!isOK)) {
1214                 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1215                 LEDsoff();
1216                 set_tracing(FALSE);
1217         }
1218 }
1219
1220 void MifareCIdent(){
1221
1222         // card commands
1223         uint8_t wupC1[]       = { 0x40 };
1224         uint8_t wupC2[]       = { 0x43 };
1225
1226         // variables
1227         byte_t isOK = 1;
1228
1229         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
1230         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
1231
1232         ReaderTransmitBitsPar(wupC1,7,0, NULL);
1233         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1234                 isOK = 0;
1235         };
1236
1237         ReaderTransmit(wupC2, sizeof(wupC2), NULL);
1238         if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
1239                 isOK = 0;
1240         };
1241
1242         // removed the if,  since some magic tags misbehavies and send an answer to it.
1243         mifare_classic_halt(NULL, 0);
1244
1245         cmd_send(CMD_ACK,isOK,0,0,0,0);
1246 }
1247
1248 void MifareCollectNonces(uint32_t arg0, uint32_t arg1){
1249
1250         BigBuf_free();
1251
1252         uint32_t iterations = arg0;
1253         uint8_t uid[10] = {0x00};
1254
1255         uint8_t *response = BigBuf_malloc(MAX_MIFARE_FRAME_SIZE);
1256         uint8_t *responsePar = BigBuf_malloc(MAX_MIFARE_PARITY_SIZE);
1257
1258         uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
1259
1260         // get memory from BigBuf.
1261         uint8_t *nonces = BigBuf_malloc(iterations * 4);
1262
1263         LED_A_ON();
1264         LED_B_OFF();
1265         LED_C_OFF();
1266
1267         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
1268         clear_trace();
1269         set_tracing(TRUE);
1270
1271         for (int i = 0; i < iterations; i++) {
1272
1273                 WDT_HIT();
1274
1275                 // Test if the action was cancelled
1276                 if(BUTTON_PRESS()) break;
1277
1278                 //              if(mifare_classic_halt(pcs, cuid)) {
1279                 //                      if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");
1280                 //}
1281
1282                 if(!iso14443a_select_card(uid, NULL, NULL)) {
1283                         if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
1284                         continue;
1285                 };
1286
1287                 // Transmit MIFARE_CLASSIC_AUTH.
1288                 ReaderTransmit(mf_auth, sizeof(mf_auth), NULL);
1289
1290                 // Receive the (4 Byte) "random" nonce
1291                 if (!ReaderReceive(response, responsePar)) {
1292                         if (MF_DBGLEVEL >= 1)   Dbprintf("Couldn't receive tag nonce");
1293                         continue;
1294                 }
1295
1296                 nonces[i*4] = bytes_to_num(response, 4);
1297         }
1298
1299         int packLen =  iterations * 4;
1300         int packSize = 0;
1301         int packNum = 0;
1302         while (packLen > 0) {
1303                 packSize = MIN(USB_CMD_DATA_SIZE, packLen);
1304                 LED_B_ON();
1305                 cmd_send(CMD_ACK, 77, 0, packSize, nonces - packLen, packSize);
1306                 LED_B_OFF();
1307
1308                 packLen -= packSize;
1309                 packNum++;
1310         }
1311         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1312         LEDsoff();
1313         set_tracing(FALSE);
1314 }
1315
1316 //
1317 // DESFIRE
1318 //
1319
1320 void Mifare_DES_Auth1(uint8_t arg0, uint8_t *datain){
1321
1322         byte_t dataout[11] = {0x00};
1323         uint8_t uid[10] = {0x00};
1324         uint32_t cuid = 0x00;
1325
1326         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
1327         clear_trace();
1328
1329         int len = iso14443a_select_card(uid, NULL, &cuid);
1330         if(!len) {
1331                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
1332                 OnError(1);
1333                 return;
1334         };
1335
1336         if(mifare_desfire_des_auth1(cuid, dataout)){
1337                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication part1: Fail.");
1338                 OnError(4);
1339                 return;
1340         }
1341
1342         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 1 FINISHED");
1343     cmd_send(CMD_ACK,1,cuid,0,dataout, sizeof(dataout));
1344 }
1345
1346 void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain){
1347
1348         uint32_t cuid = arg0;
1349         uint8_t key[16] = {0x00};
1350         byte_t dataout[12] = {0x00};
1351         byte_t isOK = 0;
1352
1353         memcpy(key, datain, 16);
1354
1355         isOK = mifare_desfire_des_auth2(cuid, key, dataout);
1356
1357         if( isOK) {
1358             if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Authentication part2: Failed");
1359                 OnError(4);
1360                 return;
1361         }
1362
1363         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 2 FINISHED");
1364
1365         cmd_send(CMD_ACK, isOK, 0, 0, dataout, sizeof(dataout));
1366         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1367         LEDsoff();
1368 }