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