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 "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 #include "des.h"
  22
  23 int MF_DBGLEVEL = MF_DBG_ALL;
  24
  25 // crypto1 helpers
  26 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  27         uint8_t bt = 0;
  28         int i;
  29
  30         if (len != 1) {
  31                 for (i = 0; i < len; i++)
  32                         data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  33         } else {
  34                 bt = 0;
  35                 for (i = 0; i < 4; i++)
  36                         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;
  37
  38                 data[0] = bt;
  39         }
  40         return;
  41 }
  42
  43 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  44         uint8_t bt = 0;
  45         int i;
  46         par[0] = 0;
  47
  48         for (i = 0; i < len; i++) {
  49                 bt = data[i];
  50                 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  51                 if((i&0x0007) == 0)
  52                         par[i>>3] = 0;
  53                 par[i>>3] |= (((filter(pcs->odd) ^ oddparity(bt)) & 0x01)<<(7-(i&0x0007)));
  54         }
  55         return;
  56 }
  57
  58 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  59         uint8_t bt = 0;
  60         int i;
  61
  62         for (i = 0; i < 4; i++)
  63                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  64
  65         return bt;
  66 }
  67
  68 // send X byte basic commands
  69 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  70 {
  71         uint8_t dcmd[data_size+3];
  72         dcmd[0] = cmd;
  73         memcpy(dcmd+1,data,data_size);
  74         AppendCrc14443a(dcmd, data_size+1);
  75         ReaderTransmit(dcmd, sizeof(dcmd), timing);
  76         int len = ReaderReceive(answer, answer_parity);
  77         if(!len) {
  78                 if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("%02X Cmd failed. Card timeout.", cmd);
  79                         len = ReaderReceive(answer,answer_parity);
  80                 //return 0;
  81         }
  82         return len;
  83 }
  84
  85 // send 2 byte commands
  86 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)
  87 {
  88         uint8_t dcmd[4], ecmd[4];
  89         uint16_t pos, res;
  90         uint8_t par[1];                 // 1 Byte parity is enough here
  91         dcmd[0] = cmd;
  92         dcmd[1] = data;
  93         AppendCrc14443a(dcmd, 2);
  94
  95         memcpy(ecmd, dcmd, sizeof(dcmd));
  96
  97         if (crypted) {
  98                 par[0] = 0;
  99                 for (pos = 0; pos < 4; pos++)
 100                 {
 101                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 102                         par[0] |= (((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) << (7-pos));
 103                 }
 104
 105                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 106
 107         } else {
 108                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 109         }
 110
 111         int len = ReaderReceive(answer, par);
 112
 113         if (answer_parity) *answer_parity = par[0];
 114
 115         if (crypted == CRYPT_ALL) {
 116                 if (len == 1) {
 117                         res = 0;
 118                         for (pos = 0; pos < 4; pos++)
 119                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 120
 121                         answer[0] = res;
 122
 123                 } else {
 124                         for (pos = 0; pos < len; pos++)
 125                         {
 126                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 127                         }
 128                 }
 129         }
 130
 131         return len;
 132 }
 133
 134 // mifare classic commands
 135 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
 136 {
 137         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 138 }
 139
 140 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)
 141 {
 142         // variables
 143         int len;
 144         uint32_t pos;
 145         uint8_t tmp4[4];
 146         uint8_t par[1] = {0x00};
 147         byte_t nr[4];
 148         uint32_t nt, ntpp; // Supplied tag nonce
 149
 150         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 151         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 152         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 153
 154         // Transmit MIFARE_CLASSIC_AUTH
 155         len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
 156         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 157         if (len != 4) return 1;
 158
 159         // "random" reader nonce:
 160         nr[0] = 0x55;
 161         nr[1] = 0x41;
 162         nr[2] = 0x49;
 163         nr[3] = 0x92;
 164
 165         // Save the tag nonce (nt)
 166         nt = bytes_to_num(receivedAnswer, 4);
 167
 168         //  ----------------------------- crypto1 create
 169         if (isNested)
 170                 crypto1_destroy(pcs);
 171
 172         // Init cipher with key
 173         crypto1_create(pcs, ui64Key);
 174
 175         if (isNested == AUTH_NESTED) {
 176                 // decrypt nt with help of new key
 177                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 178         } else {
 179                 // Load (plain) uid^nt into the cipher
 180                 crypto1_word(pcs, nt ^ uid, 0);
 181         }
 182
 183         // some statistic
 184         if (!ntptr && (MF_DBGLEVEL >= 3))
 185                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 186
 187         // save Nt
 188         if (ntptr)
 189                 *ntptr = nt;
 190
 191         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 192         par[0] = 0;
 193         for (pos = 0; pos < 4; pos++)
 194         {
 195                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 196                 par[0] |= (((filter(pcs->odd) ^ oddparity(nr[pos])) & 0x01) << (7-pos));
 197         }
 198
 199         // Skip 32 bits in pseudo random generator
 200         nt = prng_successor(nt,32);
 201
 202         //  ar+parity
 203         for (pos = 4; pos < 8; pos++)
 204         {
 205                 nt = prng_successor(nt,8);
 206                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 207                 par[0] |= (((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) << (7-pos));
 208         }
 209
 210         // Transmit reader nonce and reader answer
 211         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 212
 213         // Receive 4 byte tag answer
 214         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 215         if (!len)
 216         {
 217                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 218                 return 2;
 219         }
 220
 221         memcpy(tmp4, receivedAnswer, 4);
 222         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 223
 224         if (ntpp != bytes_to_num(tmp4, 4)) {
 225                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 226                 return 3;
 227         }
 228
 229         return 0;
 230 }
 231
 232 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 233 {
 234         // variables
 235         int len;
 236         uint8_t bt[2];
 237
 238         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 239         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 240
 241         // command MIFARE_CLASSIC_READBLOCK
 242         len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 243         if (len == 1) {
 244                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 245                 return 1;
 246         }
 247         if (len != 18) {
 248                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 249                 return 2;
 250         }
 251
 252         memcpy(bt, receivedAnswer + 16, 2);
 253         AppendCrc14443a(receivedAnswer, 16);
 254         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 255                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 256                 return 3;
 257         }
 258
 259         memcpy(blockData, receivedAnswer, 16);
 260         return 0;
 261 }
 262
 263 // mifare ultralight commands
 264 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 265
 266         uint16_t len;
 267         uint8_t resp[4];
 268         uint8_t respPar[1];
 269         uint8_t key[4] = {0x00};
 270         memcpy(key, keybytes, 4);
 271
 272         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 273                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 274         len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL);
 275         //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 276         if (len != 4) {
 277                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 278                 return 0;
 279         }
 280
 281         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 282                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 283
 284         memcpy(pack, resp, 4);
 285         return 1;
 286 }
 287
 288 int mifare_ultra_auth(uint8_t *keybytes){
 289
 290         /// 3des2k
 291
 292         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 293         uint8_t random_b[8] = {0x00};
 294         uint8_t enc_random_b[8] = {0x00};
 295         uint8_t rnd_ab[16] = {0x00};
 296         uint8_t IV[8] = {0x00};
 297         uint8_t key[16] = {0x00};
 298         memcpy(key, keybytes, 16);
 299
 300         uint16_t len;
 301         uint8_t resp[19] = {0x00};
 302         uint8_t respPar[3] = {0,0,0};
 303
 304         // REQUEST AUTHENTICATION
 305         len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);
 306         if (len != 11) {
 307                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 308                 return 0;
 309         }
 310
 311         // tag nonce.
 312         memcpy(enc_random_b,resp+1,8);
 313
 314         // decrypt nonce.
 315         tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
 316         rol(random_b,8);
 317         memcpy(rnd_ab  ,random_a,8);
 318         memcpy(rnd_ab+8,random_b,8);
 319
 320         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 321                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 322                         enc_random_b[0],enc_random_b[1],enc_random_b[2],enc_random_b[3],enc_random_b[4],enc_random_b[5],enc_random_b[6],enc_random_b[7]);
 323
 324                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 325                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 326
 327                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 328                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 329
 330                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 331                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 332         }
 333
 334         // encrypt    out, in, length, key, iv
 335         tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 336         //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
 337         len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 338         if (len != 11) {
 339                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 340                 return 0;
 341         }
 342
 343         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 344         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 345         memcpy(enc_resp, resp+1, 8);
 346
 347         // decrypt    out, in, length, key, iv
 348         tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 349         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 350                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 351                 return 0;
 352         }
 353
 354         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 355                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 356                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 357                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 358
 359                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 360                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 361                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 362
 363                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 364                                 random_a[0],random_a[1],random_a[2],random_a[3],
 365                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 366
 367                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 368                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 369                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 370         }
 371         return 1;
 372 }
 373
 374 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 375 {
 376         uint16_t len;
 377         uint8_t bt[2];
 378         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 379         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 380
 381
 382         len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 383         if (len == 1) {
 384                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 385                 return 1;
 386         }
 387         if (len != 18) {
 388                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 389                 return 2;
 390         }
 391
 392         memcpy(bt, receivedAnswer + 16, 2);
 393         AppendCrc14443a(receivedAnswer, 16);
 394         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 395                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 396                 return 3;
 397         }
 398
 399         memcpy(blockData, receivedAnswer, 14);
 400         return 0;
 401 }
 402
 403 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 404 {
 405         // variables
 406         uint16_t len, i;
 407         uint32_t pos;
 408         uint8_t par[3] = {0};           // enough for 18 Bytes to send
 409         byte_t res;
 410
 411         uint8_t d_block[18], d_block_enc[18];
 412         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 413         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 414
 415         // command MIFARE_CLASSIC_WRITEBLOCK
 416         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 417
 418         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 419                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 420                 return 1;
 421         }
 422
 423         memcpy(d_block, blockData, 16);
 424         AppendCrc14443a(d_block, 16);
 425
 426         // crypto
 427         for (pos = 0; pos < 18; pos++)
 428         {
 429                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 430                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 431         }
 432
 433         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 434
 435         // Receive the response
 436         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 437
 438         res = 0;
 439         for (i = 0; i < 4; i++)
 440                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 441
 442         if ((len != 1) || (res != 0x0A)) {
 443                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 444                 return 2;
 445         }
 446
 447         return 0;
 448 }
 449
 450 /* // command not needed, but left for future testing
 451 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 452 {
 453         uint16_t len;
 454         uint8_t par[3] = {0};  // enough for 18 parity bits
 455         uint8_t d_block[18] = {0x00};
 456         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 457         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 458
 459         len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 460
 461         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 462                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 463                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 464                 return 1;
 465         }
 466
 467         memcpy(d_block, blockData, 16);
 468         AppendCrc14443a(d_block, 16);
 469
 470         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 471
 472         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 473
 474         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 475                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 476                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 477                 return 2;
 478         }
 479         return 0;
 480 }
 481 */
 482
 483 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 484 {
 485         uint16_t len;
 486         uint8_t d_block[5] = {0x00};
 487         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 488         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 489
 490         // command MIFARE_CLASSIC_WRITEBLOCK
 491         d_block[0]= blockNo;
 492         memcpy(d_block+1,blockData,4);
 493         //AppendCrc14443a(d_block, 6);
 494
 495         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 496
 497         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 498                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 499                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 500                 return 1;
 501         }
 502         return 0;
 503 }
 504
 505 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 506 {
 507         uint16_t len;
 508         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 509         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 510
 511         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 512         if (len != 0) {
 513                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 514                         Dbprintf("halt error. response len: %x", len);
 515                 return 1;
 516         }
 517
 518         return 0;
 519 }
 520
 521 int mifare_ultra_halt()
 522 {
 523         uint16_t len;
 524         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 525         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 526
 527         len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 528         if (len != 0) {
 529                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 530                         Dbprintf("halt error. response len: %x", len);
 531                 return 1;
 532         }
 533         return 0;
 534 }
 535
 536
 537 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 538 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 539 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 540 {
 541         if (sectorNo < 32)
 542                 return 4;
 543         else
 544                 return 16;
 545 }
 546
 547 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 548 {
 549         if (sectorNo < 32)
 550                 return sectorNo * 4;
 551         else
 552                 return 32*4 + (sectorNo - 32) * 16;
 553
 554 }
 555
 556
 557 // work with emulator memory
 558 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 559         uint8_t* emCARD = BigBuf_get_EM_addr();
 560         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 561 }
 562
 563 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 564         uint8_t* emCARD = BigBuf_get_EM_addr();
 565         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 566 }
 567
 568 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 569         uint8_t* emCARD = BigBuf_get_EM_addr();
 570         memcpy(data, emCARD + bytePtr, byteCount);
 571 }
 572
 573 int emlCheckValBl(int blockNum) {
 574         uint8_t* emCARD = BigBuf_get_EM_addr();
 575         uint8_t* data = emCARD + blockNum * 16;
 576
 577         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 578                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 579                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 580                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 581                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 582                         (data[12] != (data[15] ^ 0xff))
 583                  )
 584                 return 1;
 585         return 0;
 586 }
 587
 588 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 589         uint8_t* emCARD = BigBuf_get_EM_addr();
 590         uint8_t* data = emCARD + blockNum * 16;
 591
 592         if (emlCheckValBl(blockNum)) {
 593                 return 1;
 594         }
 595
 596         memcpy(blReg, data, 4);
 597         *blBlock = data[12];
 598         return 0;
 599 }
 600
 601 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 602         uint8_t* emCARD = BigBuf_get_EM_addr();
 603         uint8_t* data = emCARD + blockNum * 16;
 604
 605         memcpy(data + 0, &blReg, 4);
 606         memcpy(data + 8, &blReg, 4);
 607         blReg = blReg ^ 0xffffffff;
 608         memcpy(data + 4, &blReg, 4);
 609
 610         data[12] = blBlock;
 611         data[13] = blBlock ^ 0xff;
 612         data[14] = blBlock;
 613         data[15] = blBlock ^ 0xff;
 614
 615         return 0;
 616 }
 617
 618 uint64_t emlGetKey(int sectorNum, int keyType) {
 619         uint8_t key[6];
 620         uint8_t* emCARD = BigBuf_get_EM_addr();
 621
 622         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 623         return bytes_to_num(key, 6);
 624 }
 625
 626 void emlClearMem(void) {
 627         int b;
 628
 629         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 630         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 631         uint8_t* emCARD = BigBuf_get_EM_addr();
 632
 633         memset(emCARD, 0, CARD_MEMORY_SIZE);
 634
 635         // fill sectors trailer data
 636         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 637                 emlSetMem((uint8_t *)trailer, b , 1);
 638         }
 639
 640         // uid
 641         emlSetMem((uint8_t *)uid, 0, 1);
 642         return;
 643 }
 644
 645
 646 // Mifare desfire commands
 647 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)
 648 {
 649     uint8_t dcmd[5] = {0x00};
 650     dcmd[0] = cmd;
 651     memcpy(dcmd+1,data,2);
 652         AppendCrc14443a(dcmd, 3);
 653
 654         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 655         int len = ReaderReceive(answer, answer_parity);
 656         if(!len) {
 657                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 658                         Dbprintf("Authentication failed. Card timeout.");
 659                 return 1;
 660     }
 661         return len;
 662 }
 663
 664 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)
 665 {
 666     uint8_t dcmd[20] = {0x00};
 667     dcmd[0] = cmd;
 668     memcpy(dcmd+1,data,17);
 669         AppendCrc14443a(dcmd, 18);
 670
 671         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 672         int len = ReaderReceive(answer, answer_parity);
 673         if(!len){
 674         if (MF_DBGLEVEL >= MF_DBG_ERROR)
 675                         Dbprintf("Authentication failed. Card timeout.");
 676                 return 1;
 677     }
 678         return len;
 679 }
 680
 681 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 682
 683         int len;
 684         // load key, keynumber
 685         uint8_t data[2]={0x0a, 0x00};
 686         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 687         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 688
 689         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 690         if (len == 1) {
 691                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 692                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 693                 return 1;
 694         }
 695
 696         if (len == 12) {
 697                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)     {
 698                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 699                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 700                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 701                                 receivedAnswer[10],receivedAnswer[11]);
 702                         }
 703                         memcpy(blockData, receivedAnswer, 12);
 704                 return 0;
 705         }
 706         return 1;
 707 }
 708
 709 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 710
 711         int len;
 712         uint8_t data[17] = {0x00};
 713         data[0] = 0xAF;
 714         memcpy(data+1,key,16);
 715
 716         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 717         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 718
 719         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 720
 721         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 722                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 723                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 724                 return 1;
 725         }
 726
 727         if (len == 12){
 728                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 729                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 730                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 731                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 732                                 receivedAnswer[10],receivedAnswer[11]);
 733                         }
 734                 memcpy(blockData, receivedAnswer, 12);
 735                 return 0;
 736         }
 737         return 1;
 738 }