cvs.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     dcmd[1] = data[0];
  89         dcmd[2] = data[1];
  90         dcmd[3] = data[2];
  91         dcmd[4] = data[3];
  92         dcmd[5] = data[4];
  93         AppendCrc14443a(dcmd, 6);
  94         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
  95         int len = ReaderReceive(answer, answer_parity);
  96         if(!len) {
  97                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
  98                 return 2;
  99     }
 100         return len;
 101 }
 102
 103 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)
 104 {
 105     uint8_t dcmd[19];
 106         int len;
 107     dcmd[0] = cmd;
 108     memcpy(dcmd+1,data,16);
 109         AppendCrc14443a(dcmd, 17);
 110
 111         ReaderTransmit(dcmd, sizeof(dcmd), timing);
 112         len = ReaderReceive(answer, answer_parity);
 113         if(!len) {
 114         if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 115         len = ReaderReceive(answer,answer_parity);
 116     }
 117     if(len==1)  {
 118                 if (MF_DBGLEVEL >= 1)   Dbprintf("NAK - Authentication failed.");
 119                 return 1;
 120         }
 121         return len;
 122 }
 123
 124 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)
 125 {
 126         uint8_t dcmd[4], ecmd[4];
 127         uint16_t pos, res;
 128         uint8_t par[1];                 // 1 Byte parity is enough here
 129         dcmd[0] = cmd;
 130         dcmd[1] = data;
 131         AppendCrc14443a(dcmd, 2);
 132
 133         memcpy(ecmd, dcmd, sizeof(dcmd));
 134
 135         if (crypted) {
 136                 par[0] = 0;
 137                 for (pos = 0; pos < 4; pos++)
 138                 {
 139                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 140                         par[0] |= (((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) << (7-pos));
 141                 }
 142
 143                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 144
 145         } else {
 146                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 147         }
 148
 149         int len = ReaderReceive(answer, par);
 150
 151         if (answer_parity) *answer_parity = par[0];
 152
 153         if (crypted == CRYPT_ALL) {
 154                 if (len == 1) {
 155                         res = 0;
 156                         for (pos = 0; pos < 4; pos++)
 157                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 158
 159                         answer[0] = res;
 160
 161                 } else {
 162                         for (pos = 0; pos < len; pos++)
 163                         {
 164                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 165                         }
 166                 }
 167         }
 168
 169         return len;
 170 }
 171
 172 // mifare commands
 173 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
 174 {
 175         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 176 }
 177
 178 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)
 179 {
 180         // variables
 181         int len;
 182         uint32_t pos;
 183         uint8_t tmp4[4];
 184         uint8_t par[1] = {0x00};
 185         byte_t nr[4];
 186         uint32_t nt, ntpp; // Supplied tag nonce
 187
 188         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 189         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 190         uint8_t *receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 191
 192         // Transmit MIFARE_CLASSIC_AUTH
 193         len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
 194         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 195         if (len != 4) return 1;
 196
 197         // "random" reader nonce:
 198         nr[0] = 0x55;
 199         nr[1] = 0x41;
 200         nr[2] = 0x49;
 201         nr[3] = 0x92;
 202
 203         // Save the tag nonce (nt)
 204         nt = bytes_to_num(receivedAnswer, 4);
 205
 206         //  ----------------------------- crypto1 create
 207         if (isNested)
 208                 crypto1_destroy(pcs);
 209
 210         // Init cipher with key
 211         crypto1_create(pcs, ui64Key);
 212
 213         if (isNested == AUTH_NESTED) {
 214                 // decrypt nt with help of new key
 215                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 216         } else {
 217                 // Load (plain) uid^nt into the cipher
 218                 crypto1_word(pcs, nt ^ uid, 0);
 219         }
 220
 221         // some statistic
 222         if (!ntptr && (MF_DBGLEVEL >= 3))
 223                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 224
 225         // save Nt
 226         if (ntptr)
 227                 *ntptr = nt;
 228
 229         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 230         par[0] = 0;
 231         for (pos = 0; pos < 4; pos++)
 232         {
 233                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 234                 par[0] |= (((filter(pcs->odd) ^ oddparity(nr[pos])) & 0x01) << (7-pos));
 235         }
 236
 237         // Skip 32 bits in pseudo random generator
 238         nt = prng_successor(nt,32);
 239
 240         //  ar+parity
 241         for (pos = 4; pos < 8; pos++)
 242         {
 243                 nt = prng_successor(nt,8);
 244                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 245                 par[0] |= (((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) << (7-pos));
 246         }
 247
 248         // Transmit reader nonce and reader answer
 249         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 250
 251         // Receive 4 byte tag answer
 252         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 253         if (!len)
 254         {
 255                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 256                 return 2;
 257         }
 258
 259         memcpy(tmp4, receivedAnswer, 4);
 260         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 261
 262         if (ntpp != bytes_to_num(tmp4, 4)) {
 263                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 264                 return 3;
 265         }
 266
 267         return 0;
 268 }
 269
 270 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 271 {
 272         // variables
 273         int len;
 274         uint8_t bt[2];
 275
 276         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 277         uint8_t* receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 278
 279         // command MIFARE_CLASSIC_READBLOCK
 280         len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 281         if (len == 1) {
 282                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 283                 return 1;
 284         }
 285         if (len != 18) {
 286                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 287                 return 2;
 288         }
 289
 290         memcpy(bt, receivedAnswer + 16, 2);
 291         AppendCrc14443a(receivedAnswer, 16);
 292         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 293                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 294                 return 3;
 295         }
 296
 297         memcpy(blockData, receivedAnswer, 16);
 298         return 0;
 299 }
 300
 301 int mifare_ultra_auth1(uint32_t uid, uint8_t *blockData){
 302         // variables
 303         uint16_t len;
 304
 305         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 306         uint8_t* receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 307
 308         // command MIFARE_CLASSIC_READBLOCK
 309         len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, receivedAnswer,receivedAnswerPar ,NULL);
 310         if (len == 1) {
 311                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 312                 return 1;
 313         }
 314         if (len == 11) {
 315                 if (MF_DBGLEVEL >= 1)   Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 316                   receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 317                   receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 318                   receivedAnswer[10]);
 319                 memcpy(blockData, receivedAnswer, 11);
 320             return 0;
 321         }
 322         //else something went wrong???
 323         return 1;
 324 }
 325
 326 int mifare_ultra_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 327         // variables
 328         uint16_t len;
 329
 330         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 331         uint8_t* receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 332
 333         // command MIFARE_CLASSIC_READBLOCK
 334         len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, key, receivedAnswer, receivedAnswerPar, NULL);
 335         if (len == 1) {
 336                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 337                 return 1;
 338         }
 339         if (len == 11){
 340                 if (MF_DBGLEVEL >= 1)   Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 341                   receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 342                   receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 343                   receivedAnswer[10]);
 344                 memcpy(blockData, receivedAnswer, 11);
 345                 return 0;
 346         }
 347         //something went wrong?
 348         return 1;
 349 }
 350
 351 int mifare_ultra_readblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 352 {
 353         // variables
 354         uint16_t len;
 355         uint8_t bt[2];
 356
 357         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 358         uint8_t* receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 359
 360
 361         // command MIFARE_CLASSIC_READBLOCK
 362         len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 363         if (len == 1) {
 364                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 365                 return 1;
 366         }
 367         if (len != 18) {
 368                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 369                 return 2;
 370         }
 371
 372         memcpy(bt, receivedAnswer + 16, 2);
 373         AppendCrc14443a(receivedAnswer, 16);
 374         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 375                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 376                 return 3;
 377         }
 378
 379         memcpy(blockData, receivedAnswer, 14);
 380         return 0;
 381 }
 382
 383
 384 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 385 {
 386         // variables
 387         uint16_t len, i;
 388         uint32_t pos;
 389         uint8_t par[3] = {0};           // enough for 18 Bytes to send
 390         byte_t res;
 391
 392         uint8_t d_block[18], d_block_enc[18];
 393         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 394         uint8_t* receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 395
 396         // command MIFARE_CLASSIC_WRITEBLOCK
 397         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 398
 399         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 400                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 401                 return 1;
 402         }
 403
 404         memcpy(d_block, blockData, 16);
 405         AppendCrc14443a(d_block, 16);
 406
 407         // crypto
 408         for (pos = 0; pos < 18; pos++)
 409         {
 410                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 411                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 412         }
 413
 414         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 415
 416         // Receive the response
 417         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 418
 419         res = 0;
 420         for (i = 0; i < 4; i++)
 421                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 422
 423         if ((len != 1) || (res != 0x0A)) {
 424                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 425                 return 2;
 426         }
 427
 428         return 0;
 429 }
 430
 431 int mifare_ultra_writeblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 432 {
 433         // variables
 434         uint16_t len;
 435         uint8_t par[3] = {0}; // enough for 18 parity bits
 436
 437         uint8_t d_block[18];
 438         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 439         uint8_t* receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 440
 441         // command MIFARE_CLASSIC_WRITEBLOCK
 442         len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 443
 444         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 445                         if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 446                         return 1;
 447         }
 448
 449         memset(d_block,'\0',18);
 450         memcpy(d_block, blockData, 16);
 451     AppendCrc14443a(d_block, 16);
 452
 453         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 454
 455         // Receive the response
 456     len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 457
 458         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 459                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 460                 return 2;
 461         }
 462
 463     return 0;
 464 }
 465
 466 int mifare_ultra_special_writeblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 467 {
 468     uint16_t len;
 469
 470         uint8_t d_block[8];
 471         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 472         uint8_t *receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 473
 474     // command MIFARE_CLASSIC_WRITEBLOCK
 475         memset(d_block,'\0',8);
 476         d_block[0]= blockNo;
 477         memcpy(d_block+1,blockData,4);
 478         AppendCrc14443a(d_block, 6);
 479
 480         //i know the data send here is correct
 481     len = mifare_sendcmd_short_special(NULL, 1, 0xA2, d_block, receivedAnswer, receivedAnswerPar, NULL);
 482
 483         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 484                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 485                 return 1;
 486         }
 487         return 0;
 488 }
 489
 490 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 491 {
 492         uint16_t len;
 493         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 494         uint8_t *receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 495
 496         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 497         if (len != 0) {
 498                 if (MF_DBGLEVEL >= 1)   Dbprintf("halt error. response len: %x", len);
 499                 return 1;
 500         }
 501
 502         return 0;
 503 }
 504
 505 int mifare_ultra_halt(uint32_t uid)
 506 {
 507         uint16_t len;
 508         uint8_t* receivedAnswer = get_bigbufptr_recvrespbuf();
 509         uint8_t *receivedAnswerPar = receivedAnswer + MAX_FRAME_SIZE;
 510
 511         len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 512         if (len != 0) {
 513                 if (MF_DBGLEVEL >= 1)   Dbprintf("halt error. response len: %x", len);
 514                 return 1;
 515         }
 516
 517         return 0;
 518 }
 519
 520
 521 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 522 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 523 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 524 {
 525         if (sectorNo < 32)
 526                 return 4;
 527         else
 528                 return 16;
 529 }
 530
 531 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 532 {
 533         if (sectorNo < 32)
 534                 return sectorNo * 4;
 535         else
 536                 return 32*4 + (sectorNo - 32) * 16;
 537
 538 }
 539
 540
 541 // work with emulator memory
 542 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 543         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 544         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 545 }
 546
 547 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 548         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 549         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 550 }
 551
 552 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 553         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 554         memcpy(data, emCARD + bytePtr, byteCount);
 555 }
 556
 557 int emlCheckValBl(int blockNum) {
 558         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 559         uint8_t* data = emCARD + blockNum * 16;
 560
 561         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 562                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 563                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 564                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 565                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 566                         (data[12] != (data[15] ^ 0xff))
 567                  )
 568                 return 1;
 569         return 0;
 570 }
 571
 572 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 573         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 574         uint8_t* data = emCARD + blockNum * 16;
 575
 576         if (emlCheckValBl(blockNum)) {
 577                 return 1;
 578         }
 579
 580         memcpy(blReg, data, 4);
 581         *blBlock = data[12];
 582         return 0;
 583 }
 584
 585 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 586         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 587         uint8_t* data = emCARD + blockNum * 16;
 588
 589         memcpy(data + 0, &blReg, 4);
 590         memcpy(data + 8, &blReg, 4);
 591         blReg = blReg ^ 0xffffffff;
 592         memcpy(data + 4, &blReg, 4);
 593
 594         data[12] = blBlock;
 595         data[13] = blBlock ^ 0xff;
 596         data[14] = blBlock;
 597         data[15] = blBlock ^ 0xff;
 598
 599         return 0;
 600 }
 601
 602 uint64_t emlGetKey(int sectorNum, int keyType) {
 603         uint8_t key[6];
 604         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 605
 606         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 607         return bytes_to_num(key, 6);
 608 }
 609
 610 void emlClearMem(void) {
 611         int b;
 612
 613         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 614         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 615         uint8_t* emCARD = get_bigbufptr_emlcardmem();
 616
 617         memset(emCARD, 0, CARD_MEMORY_SIZE);
 618
 619         // fill sectors trailer data
 620         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 621                 emlSetMem((uint8_t *)trailer, b , 1);
 622         }
 623
 624         // uid
 625         emlSetMem((uint8_t *)uid, 0, 1);
 626         return;
 627 }