armsrc/mifareutil.c

   1 //-----------------------------------------------------------------------------
   2 // Merlok, May 2011, 2012
   3 // Many authors, whom made it possible
   4 //
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // Work with mifare cards.
  10 //-----------------------------------------------------------------------------
  11
  12 #include "proxmark3.h"
  13 #include "apps.h"
  14 #include "util.h"
  15 #include "string.h"
  16
  17 #include "iso14443crc.h"
  18 #include "iso14443a.h"
  19 #include "crapto1.h"
  20 #include "mifareutil.h"
  21
  22 int MF_DBGLEVEL = MF_DBG_ALL;
  23
  24 // crypto1 helpers
  25 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  26         uint8_t bt = 0;
  27         int i;
  28
  29         if (len != 1) {
  30                 for (i = 0; i < len; i++)
  31                         data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  32         } else {
  33                 bt = 0;
  34                 for (i = 0; i < 4; i++)
  35                         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;
  36
  37                 data[0] = bt;
  38         }
  39         return;
  40 }
  41
  42 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  43         uint8_t bt = 0;
  44         int i;
  45         par[0] = 0;
  46
  47         for (i = 0; i < len; i++) {
  48                 bt = data[i];
  49                 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  50                 if((i&0x0007) == 0)
  51                         par[i>>3] = 0;
  52                 par[i>>3] |= (((filter(pcs->odd) ^ oddparity(bt)) & 0x01)<<(7-(i&0x0007)));
  53         }
  54         return;
  55 }
  56
  57 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  58         uint8_t bt = 0;
  59         int i;
  60
  61         for (i = 0; i < 4; i++)
  62                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  63
  64         return bt;
  65 }
  66
  67 // send commands
  68 int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  69 {
  70         return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, answer_parity, timing);
  71 }
  72
  73 int mifare_sendcmd_short_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  74 {
  75         uint8_t dcmd[8];
  76     dcmd[0] = cmd;
  77     dcmd[1] = data[0];
  78         dcmd[2] = data[1];
  79         dcmd[3] = data[2];
  80         dcmd[4] = data[3];
  81         dcmd[5] = data[4];
  82         AppendCrc14443a(dcmd, 6);
  83         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
  84         int len = ReaderReceive(answer, answer_parity);
  85         if(!len) {
  86                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
  87                 return 2;
  88     }
  89         return len;
  90 }
  91
  92 int mifare_sendcmd_short_mfucauth(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t *data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
  93 {
  94     uint8_t dcmd[19];
  95         int len;
  96     dcmd[0] = cmd;
  97     memcpy(dcmd+1,data,16);
  98         AppendCrc14443a(dcmd, 17);
  99
 100         ReaderTransmit(dcmd, sizeof(dcmd), timing);
 101         len = ReaderReceive(answer, answer_parity);
 102         if(!len) {
 103         if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("Authentication failed. Card timeout.");
 104         len = ReaderReceive(answer,answer_parity);
 105     }
 106     if(len==1)  {
 107                 if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("NAK - Authentication failed.");
 108                 return 1;
 109         }
 110         return len;
 111 }
 112
 113 int mifare_sendcmd_shortex(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
 114 {
 115         uint8_t dcmd[4], ecmd[4];
 116         uint16_t pos, res;
 117         uint8_t par[1];                 // 1 Byte parity is enough here
 118         dcmd[0] = cmd;
 119         dcmd[1] = data;
 120         AppendCrc14443a(dcmd, 2);
 121
 122         memcpy(ecmd, dcmd, sizeof(dcmd));
 123
 124         if (crypted) {
 125                 par[0] = 0;
 126                 for (pos = 0; pos < 4; pos++)
 127                 {
 128                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 129                         par[0] |= (((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) << (7-pos));
 130                 }
 131
 132                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 133
 134         } else {
 135                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 136         }
 137
 138         int len = ReaderReceive(answer, par);
 139
 140         if (answer_parity) *answer_parity = par[0];
 141
 142         if (crypted == CRYPT_ALL) {
 143                 if (len == 1) {
 144                         res = 0;
 145                         for (pos = 0; pos < 4; pos++)
 146                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 147
 148                         answer[0] = res;
 149
 150                 } else {
 151                         for (pos = 0; pos < len; pos++)
 152                         {
 153                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 154                         }
 155                 }
 156         }
 157
 158         return len;
 159 }
 160
 161 // mifare classic commands
 162 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
 163 {
 164         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 165 }
 166
 167 int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *ntptr, uint32_t *timing)
 168 {
 169         // variables
 170         int len;
 171         uint32_t pos;
 172         uint8_t tmp4[4];
 173         uint8_t par[1] = {0x00};
 174         byte_t nr[4];
 175         uint32_t nt, ntpp; // Supplied tag nonce
 176
 177         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 178         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 179         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 180
 181         // Transmit MIFARE_CLASSIC_AUTH
 182         len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
 183         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 184         if (len != 4) return 1;
 185
 186         // "random" reader nonce:
 187         nr[0] = 0x55;
 188         nr[1] = 0x41;
 189         nr[2] = 0x49;
 190         nr[3] = 0x92;
 191
 192         // Save the tag nonce (nt)
 193         nt = bytes_to_num(receivedAnswer, 4);
 194
 195         //  ----------------------------- crypto1 create
 196         if (isNested)
 197                 crypto1_destroy(pcs);
 198
 199         // Init cipher with key
 200         crypto1_create(pcs, ui64Key);
 201
 202         if (isNested == AUTH_NESTED) {
 203                 // decrypt nt with help of new key
 204                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 205         } else {
 206                 // Load (plain) uid^nt into the cipher
 207                 crypto1_word(pcs, nt ^ uid, 0);
 208         }
 209
 210         // some statistic
 211         if (!ntptr && (MF_DBGLEVEL >= 3))
 212                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 213
 214         // save Nt
 215         if (ntptr)
 216                 *ntptr = nt;
 217
 218         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 219         par[0] = 0;
 220         for (pos = 0; pos < 4; pos++)
 221         {
 222                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 223                 par[0] |= (((filter(pcs->odd) ^ oddparity(nr[pos])) & 0x01) << (7-pos));
 224         }
 225
 226         // Skip 32 bits in pseudo random generator
 227         nt = prng_successor(nt,32);
 228
 229         //  ar+parity
 230         for (pos = 4; pos < 8; pos++)
 231         {
 232                 nt = prng_successor(nt,8);
 233                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 234                 par[0] |= (((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) << (7-pos));
 235         }
 236
 237         // Transmit reader nonce and reader answer
 238         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 239
 240         // Receive 4 byte tag answer
 241         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 242         if (!len)
 243         {
 244                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 245                 return 2;
 246         }
 247
 248         memcpy(tmp4, receivedAnswer, 4);
 249         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 250
 251         if (ntpp != bytes_to_num(tmp4, 4)) {
 252                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 253                 return 3;
 254         }
 255
 256         return 0;
 257 }
 258
 259 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 260 {
 261         // variables
 262         int len;
 263         uint8_t bt[2];
 264
 265         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 266         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 267
 268         // command MIFARE_CLASSIC_READBLOCK
 269         len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 270         if (len == 1) {
 271                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 272                 return 1;
 273         }
 274         if (len != 18) {
 275                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 276                 return 2;
 277         }
 278
 279         memcpy(bt, receivedAnswer + 16, 2);
 280         AppendCrc14443a(receivedAnswer, 16);
 281         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 282                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 283                 return 3;
 284         }
 285
 286         memcpy(blockData, receivedAnswer, 16);
 287         return 0;
 288 }
 289
 290 // mifare ultralight commands
 291 int mifare_ultra_auth1(uint32_t uid, uint8_t *blockData){
 292
 293         uint16_t len;
 294         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 295         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 296
 297         len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, receivedAnswer,receivedAnswerPar ,NULL);
 298         if (len == 1) {
 299                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 300                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 301                 return 1;
 302         }
 303         if (len != 11)
 304                 return 1;
 305
 306         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 307                 Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 308                         receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 309                         receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 310                         receivedAnswer[10]);
 311                 }
 312         memcpy(blockData, receivedAnswer, 11);
 313         return 0;
 314 }
 315
 316 int mifare_ultra_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 317
 318         uint16_t len;
 319         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 320         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 321
 322         len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, key, receivedAnswer, receivedAnswerPar, NULL);
 323         if (len == 1) {
 324                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 325                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 326                 return 1;
 327         }
 328         if (len != 11)
 329                 return 1;
 330
 331         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 332                 Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 333                         receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 334                         receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 335                         receivedAnswer[10]);
 336         }
 337         memcpy(blockData, receivedAnswer, 11);
 338         return 0;
 339 }
 340
 341 int mifare_ultra_readblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 342 {
 343         uint16_t len;
 344         uint8_t bt[2];
 345         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 346         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 347
 348
 349         // command MIFARE_CLASSIC_READBLOCK
 350         len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 351         if (len == 1) {
 352                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 353                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 354                 return 1;
 355         }
 356         if (len != 18) {
 357                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 358                         Dbprintf("Cmd Error: card timeout. len: %x", len);
 359                 return 2;
 360         }
 361
 362         memcpy(bt, receivedAnswer + 16, 2);
 363         AppendCrc14443a(receivedAnswer, 16);
 364         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 365                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 366                         Dbprintf("Cmd CRC response error.");
 367                 return 3;
 368         }
 369
 370         memcpy(blockData, receivedAnswer, 14);
 371         return 0;
 372 }
 373
 374
 375 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 376 {
 377         // variables
 378         uint16_t len, i;
 379         uint32_t pos;
 380         uint8_t par[3] = {0};           // enough for 18 Bytes to send
 381         byte_t res;
 382
 383         uint8_t d_block[18], d_block_enc[18];
 384         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 385         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 386
 387         // command MIFARE_CLASSIC_WRITEBLOCK
 388         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 389
 390         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 391                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 392                 return 1;
 393         }
 394
 395         memcpy(d_block, blockData, 16);
 396         AppendCrc14443a(d_block, 16);
 397
 398         // crypto
 399         for (pos = 0; pos < 18; pos++)
 400         {
 401                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 402                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 403         }
 404
 405         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 406
 407         // Receive the response
 408         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 409
 410         res = 0;
 411         for (i = 0; i < 4; i++)
 412                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 413
 414         if ((len != 1) || (res != 0x0A)) {
 415                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 416                 return 2;
 417         }
 418
 419         return 0;
 420 }
 421
 422 int mifare_ultra_writeblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 423 {
 424     uint16_t len;
 425     uint8_t par[3] = {0};  // enough for 18 parity bits
 426         uint8_t d_block[18] = {0x00};
 427         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 428         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 429
 430     // command MIFARE_CLASSIC_WRITEBLOCK
 431     len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 432
 433     if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 434                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 435                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 436         return 1;
 437     }
 438
 439         memcpy(d_block, blockData, 16);
 440     AppendCrc14443a(d_block, 16);
 441
 442         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 443
 444     len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 445
 446         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 447                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 448                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 449         return 2;
 450     }
 451     return 0;
 452 }
 453
 454 int mifare_ultra_special_writeblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 455 {
 456     uint16_t len;
 457         uint8_t d_block[8] = {0x00};
 458         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 459         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 460
 461     // command MIFARE_CLASSIC_WRITEBLOCK
 462         d_block[0]= blockNo;
 463         memcpy(d_block+1,blockData,4);
 464         AppendCrc14443a(d_block, 6);
 465
 466     len = mifare_sendcmd_short_special(NULL, 1, 0xA2, d_block, receivedAnswer, receivedAnswerPar, NULL);
 467
 468     if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 469                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 470                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 471         return 1;
 472     }
 473 
    return 0;
 474 }
 475
 476 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 477 {
 478         uint16_t len;
 479         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 480         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 481
 482         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 483         if (len != 0) {
 484                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 485                         Dbprintf("halt error. response len: %x", len);
 486                 return 1;
 487         }
 488
 489         return 0;
 490 }
 491
 492 int mifare_ultra_halt(uint32_t uid)
 493 {
 494         uint16_t len;
 495         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 496         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 497
 498         len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 499         if (len != 0) {
 500                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 501                         Dbprintf("halt error. response len: %x", len);
 502                 return 1;
 503         }
 504         return 0;
 505 }
 506
 507
 508 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 509 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 510 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 511 {
 512         if (sectorNo < 32)
 513                 return 4;
 514         else
 515                 return 16;
 516 }
 517
 518 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 519 {
 520         if (sectorNo < 32)
 521                 return sectorNo * 4;
 522         else
 523                 return 32*4 + (sectorNo - 32) * 16;
 524
 525 }
 526
 527
 528 // work with emulator memory
 529 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 530         uint8_t* emCARD = BigBuf_get_EM_addr();
 531         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 532 }
 533
 534 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 535         uint8_t* emCARD = BigBuf_get_EM_addr();
 536         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 537 }
 538
 539 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 540         uint8_t* emCARD = BigBuf_get_EM_addr();
 541         memcpy(data, emCARD + bytePtr, byteCount);
 542 }
 543
 544 int emlCheckValBl(int blockNum) {
 545         uint8_t* emCARD = BigBuf_get_EM_addr();
 546         uint8_t* data = emCARD + blockNum * 16;
 547
 548         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 549                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 550                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 551                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 552                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 553                         (data[12] != (data[15] ^ 0xff))
 554                  )
 555                 return 1;
 556         return 0;
 557 }
 558
 559 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 560         uint8_t* emCARD = BigBuf_get_EM_addr();
 561         uint8_t* data = emCARD + blockNum * 16;
 562
 563         if (emlCheckValBl(blockNum)) {
 564                 return 1;
 565         }
 566
 567         memcpy(blReg, data, 4);
 568         *blBlock = data[12];
 569         return 0;
 570 }
 571
 572 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 573         uint8_t* emCARD = BigBuf_get_EM_addr();
 574         uint8_t* data = emCARD + blockNum * 16;
 575
 576         memcpy(data + 0, &blReg, 4);
 577         memcpy(data + 8, &blReg, 4);
 578         blReg = blReg ^ 0xffffffff;
 579         memcpy(data + 4, &blReg, 4);
 580
 581         data[12] = blBlock;
 582         data[13] = blBlock ^ 0xff;
 583         data[14] = blBlock;
 584         data[15] = blBlock ^ 0xff;
 585
 586         return 0;
 587 }
 588
 589 uint64_t emlGetKey(int sectorNum, int keyType) {
 590         uint8_t key[6];
 591         uint8_t* emCARD = BigBuf_get_EM_addr();
 592
 593         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 594         return bytes_to_num(key, 6);
 595 }
 596
 597 void emlClearMem(void) {
 598         int b;
 599
 600         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 601         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 602         uint8_t* emCARD = BigBuf_get_EM_addr();
 603
 604         memset(emCARD, 0, CARD_MEMORY_SIZE);
 605
 606         // fill sectors trailer data
 607         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 608                 emlSetMem((uint8_t *)trailer, b , 1);
 609         }
 610
 611         // uid
 612         emlSetMem((uint8_t *)uid, 0, 1);
 613         return;
 614 }
 615
 616
 617 // Mifare desfire commands
 618 int mifare_sendcmd_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
 619 {
 620     uint8_t dcmd[5] = {0x00};
 621     dcmd[0] = cmd;
 622     memcpy(dcmd+1,data,2);
 623         AppendCrc14443a(dcmd, 3);
 624
 625         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 626         int len = ReaderReceive(answer, answer_parity);
 627         if(!len) {
 628                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 629                         Dbprintf("Authentication failed. Card timeout.");
 630                 return 1;
 631     }
 632         return len;
 633 }
 634
 635 int mifare_sendcmd_special2(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer,uint8_t *answer_parity, uint32_t *timing)
 636 {
 637     uint8_t dcmd[20] = {0x00};
 638     dcmd[0] = cmd;
 639     memcpy(dcmd+1,data,17);
 640         AppendCrc14443a(dcmd, 18);
 641
 642         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 643         int len = ReaderReceive(answer, answer_parity);
 644         if(!len){
 645         if (MF_DBGLEVEL >= MF_DBG_ERROR)
 646                         Dbprintf("Authentication failed. Card timeout.");
 647                 return 1;
 648     }
 649         return len;
 650 }
 651
 652 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 653
 654         int len;
 655         // load key, keynumber
 656         uint8_t data[2]={0x0a, 0x00};
 657         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 658         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 659
 660         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 661         if (len == 1) {
 662                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 663                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 664                 return 1;
 665         }
 666
 667         if (len == 12) {
 668                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)     {
 669                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 670                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 671                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 672                                 receivedAnswer[10],receivedAnswer[11]);
 673                         }
 674                         memcpy(blockData, receivedAnswer, 12);
 675                 return 0;
 676         }
 677         return 1;
 678 }
 679
 680 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 681
 682         int len;
 683         uint8_t data[17] = {0x00};
 684         data[0] = 0xAF;
 685         memcpy(data+1,key,16);
 686
 687         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 688         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 689
 690         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 691
 692         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 693                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 694                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 695                 return 1;
 696         }
 697
 698         if (len == 12){
 699                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 700                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 701                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 702                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 703                                 receivedAnswer[10],receivedAnswer[11]);
 704                         }
 705                 memcpy(blockData, receivedAnswer, 12);
 706                 return 0;
 707         }
 708         return 1;
 709 }