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 #include "mifareutil.h"
  12
  13 int MF_DBGLEVEL = MF_DBG_ALL;
  14
  15 // crypto1 helpers
  16 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  17         uint8_t bt = 0;
  18         int i;
  19
  20         if (len != 1) {
  21                 for (i = 0; i < len; i++)
  22                         data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  23         } else {
  24                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], 0)) << 0;
  25                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], 1)) << 1;
  26                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], 2)) << 2;
  27                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], 3)) << 3;
  28                 data[0] = bt;
  29         }
  30         return;
  31 }
  32
  33 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  34         uint8_t bt = 0;
  35         int i;
  36         par[0] = 0;
  37
  38         for (i = 0; i < len; i++) {
  39                 bt = data[i];
  40                 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  41                 if ( ( i & 0x0007 ) == 0)
  42                         par[ i >> 3 ] = 0;
  43                 par[ i >> 3 ] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007)));
  44         }
  45 }
  46
  47 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  48         uint8_t bt = 0;
  49         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 0)) << 0;
  50         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 1)) << 1;
  51         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 2)) << 2;
  52         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 3)) << 3;
  53         return bt;
  54 }
  55
  56 // send X byte basic commands
  57 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing) {
  58         uint8_t dcmd[data_size+3];
  59     dcmd[0] = cmd;
  60         memcpy(dcmd+1, data, data_size);
  61         AppendCrc14443a(dcmd, data_size+1);
  62         ReaderTransmit(dcmd, sizeof(dcmd), timing);
  63         int len = ReaderReceive(answer, answer_parity);
  64         if(!len) {
  65                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
  66                         Dbprintf("%02X Cmd failed. Card timeout.", cmd);
  67                 len = ReaderReceive(answer,answer_parity);
  68     }
  69         return len;
  70 }
  71
  72 // send 2 byte commands
  73 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) {
  74         uint16_t pos, res;
  75         uint8_t dcmd[4] = {cmd, data, 0x00, 0x00};
  76         uint8_t ecmd[4] = {0x00, 0x00, 0x00, 0x00};
  77         uint8_t par[1] = {0x00};                        // 1 Byte parity is enough here
  78         AppendCrc14443a(dcmd, 2);
  79         memcpy(ecmd, dcmd, sizeof(dcmd));
  80
  81         if (crypted) {
  82                 par[0] = 0;
  83                 for (pos = 0; pos < 4; pos++) {
  84                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
  85                         par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
  86                 }
  87                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
  88         } else {
  89                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
  90         }
  91
  92         int len = ReaderReceive(answer, par);
  93
  94         if (answer_parity) *answer_parity = par[0];
  95
  96         if (crypted == CRYPT_ALL) {
  97                 if (len == 1) {
  98                         res = 0;
  99                         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 0)) << 0;
 100                         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 1)) << 1;
 101                         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 2)) << 2;
 102                         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 3)) << 3;
 103                         answer[0] = res;
 104                 } else {
 105                         for (pos = 0; pos < len; pos++)
 106                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 107                 }
 108         }
 109         return len;
 110 }
 111
 112 // mifare classic commands
 113 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested) {
 114         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 115 }
 116
 117 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) {
 118         int len;
 119         uint32_t pos;
 120         uint8_t par[1] = {0x00};
 121
 122         // "random" reader nonce:
 123         //byte_t nr[4] = {0x55, 0x41, 0x49, 0x92};
 124         fast_prand();
 125         byte_t nr[4];
 126         num_to_bytes(prand(), 4, nr);
 127         //byte_t nr[4] = {0x01, 0x01, 0x01, 0x01};
 128
 129         uint32_t nt, ntpp; // Supplied tag nonce
 130
 131         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 132         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
 133         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
 134
 135         // Transmit MIFARE_CLASSIC_AUTH
 136         len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
 137         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 138         if (len != 4) return 1;
 139
 140         // Save the tag nonce (nt)
 141         nt = bytes_to_num(receivedAnswer, 4);
 142
 143         //  ----------------------------- crypto1 create
 144         if (isNested)
 145                 crypto1_destroy(pcs);
 146
 147         // Init cipher with key
 148         crypto1_create(pcs, ui64Key);
 149
 150         if (isNested == AUTH_NESTED) {
 151                 // decrypt nt with help of new key
 152                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 153         } else {
 154                 // Load (plain) uid^nt into the cipher
 155                 crypto1_word(pcs, nt ^ uid, 0);
 156         }
 157
 158         // some statistic
 159         if (!ntptr && (MF_DBGLEVEL >= 3))
 160                 Dbprintf("auth uid: %08x | nr: %08x | nt: %08x", uid, nr, nt);
 161
 162         // save Nt
 163         if (ntptr)
 164                 *ntptr = nt;
 165
 166         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 167         par[0] = 0;
 168         for (pos = 0; pos < 4; pos++) {
 169                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 170                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
 171         }
 172
 173         // Skip 32 bits in pseudo random generator
 174         nt = prng_successor(nt, 32);
 175
 176         //  ar+parity
 177         for (pos = 4; pos < 8; pos++) {
 178                 nt = prng_successor(nt,8);
 179                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 180                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt & 0xff)) & 0x01) << (7-pos));
 181         }
 182
 183         // Transmit reader nonce and reader answer
 184         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 185
 186         // Receive 4 byte tag answer
 187         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 188         if (!len) {
 189                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 190                 return 2;
 191         }
 192
 193         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 194
 195         if (ntpp != bytes_to_num(receivedAnswer, 4)) {
 196                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 197                 return 3;
 198         }
 199         return 0;
 200 }
 201
 202 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) {
 203
 204         int len;
 205         uint8_t bt[2] = {0x00, 0x00};
 206         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
 207         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
 208
 209         len = mifare_sendcmd_short(pcs, 1, ISO14443A_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 210         if (len == 1) {
 211                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 212                 return 1;
 213         }
 214         if (len != 18) {
 215                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 216                 return 2;
 217         }
 218
 219         memcpy(bt, receivedAnswer + 16, 2);
 220         AppendCrc14443a(receivedAnswer, 16);
 221         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 222                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 223                 return 3;
 224         }
 225
 226         memcpy(blockData, receivedAnswer, 16);
 227         return 0;
 228 }
 229
 230 // mifare ultralight commands
 231 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 232
 233         uint16_t len = 0;
 234         uint8_t resp[4] = {0x00, 0x00, 0x00, 0x00};
 235         uint8_t respPar[1] = {0x00};
 236         uint8_t key[4] = {0x00, 0x00, 0x00, 0x00};
 237         memcpy(key, keybytes, 4);
 238
 239         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 240                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 241
 242         len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL);
 243
 244         if (len != 4) {
 245                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 246                 return 0;
 247         }
 248
 249         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 250                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 251
 252         memcpy(pack, resp, 4);
 253         return 1;
 254 }
 255
 256 int mifare_ultra_auth(uint8_t *keybytes){
 257
 258         /// 3des2k
 259         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 260         uint8_t random_b[8] = {0x00};
 261         uint8_t enc_random_b[8] = {0x00};
 262         uint8_t rnd_ab[16] = {0x00};
 263         uint8_t IV[8] = {0x00};
 264         uint8_t key[16] = {0x00};
 265         memcpy(key, keybytes, 16);
 266
 267         uint16_t len = 0;
 268         uint8_t resp[19] = {0x00};
 269         uint8_t respPar[3] = {0,0,0};
 270
 271         // REQUEST AUTHENTICATION
 272         len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);
 273         if (len != 11) {
 274                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 275                 return 0;
 276         }
 277
 278         // tag nonce.
 279         memcpy(enc_random_b,resp+1,8);
 280
 281         // decrypt nonce.
 282         tdes_2key_dec((void*)random_b, (void*)enc_random_b, sizeof(random_b), (const void*)key, IV );
 283         rol(random_b,8);
 284         memcpy(rnd_ab  ,random_a,8);
 285         memcpy(rnd_ab+8,random_b,8);
 286
 287         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 288                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 289                         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]);
 290
 291                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 292                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 293
 294                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 295                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 296
 297                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 298                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 299         }
 300
 301         // encrypt    out, in, length, key, iv
 302         tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 303
 304         len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 305         if (len != 11) {
 306                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 307                 return 0;
 308         }
 309
 310         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 311         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 312         memcpy(enc_resp, resp+1, 8);
 313
 314         // decrypt    out, in, length, key, iv
 315         tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 316         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 317                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 318                 return 0;
 319         }
 320
 321         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 322                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 323                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 324                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 325
 326                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 327                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 328                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 329
 330                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 331                                 random_a[0],random_a[1],random_a[2],random_a[3],
 332                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 333
 334                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 335                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 336                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 337         }
 338         return 1;
 339 }
 340
 341 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) {
 342         uint16_t len = 0;
 343         uint8_t bt[2] = {0x00, 0x00};
 344         uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
 345         uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
 346
 347         len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 348         if (len == 1) {
 349                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 350                 return 1;
 351         }
 352         if (len != 18) {
 353                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 354                 return 2;
 355         }
 356
 357         memcpy(bt, receivedAnswer + 16, 2);
 358         AppendCrc14443a(receivedAnswer, 16);
 359         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 360                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 361                 return 3;
 362         }
 363
 364         memcpy(blockData, receivedAnswer, 14);
 365         return 0;
 366 }
 367
 368 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) {
 369         // variables
 370         uint16_t len = 0;
 371         uint32_t pos = 0;
 372         uint8_t par[3] = {0x00, 0x00, 0x00}; // enough for 18 Bytes to send
 373         byte_t res = 0;
 374
 375         uint8_t d_block[18], d_block_enc[18];
 376         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
 377         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
 378
 379         // command MIFARE_CLASSIC_WRITEBLOCK
 380         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 381
 382         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 383                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 384                 return 1;
 385         }
 386
 387         memcpy(d_block, blockData, 16);
 388         AppendCrc14443a(d_block, 16);
 389
 390         // crypto
 391         for (pos = 0; pos < 18; pos++) {
 392                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 393                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 394         }
 395
 396         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 397
 398         // Receive the response
 399         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 400
 401         res = 0;
 402         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 0)) << 0;
 403         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 1)) << 1;
 404         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 2)) << 2;
 405         res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 3)) << 3;
 406
 407         if ((len != 1) || (res != 0x0A)) {
 408                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 409                 return 2;
 410         }
 411         return 0;
 412 }
 413
 414 /* // command not needed, but left for future testing
 415 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData) {
 416         uint16_t len;
 417     uint8_t par[3] = {0};  // enough for 18 parity bits
 418         uint8_t d_block[18] = {0x00};
 419         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 420         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 421
 422     len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 423
 424     if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 425                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 426                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 427         return 1;
 428     }
 429
 430         memcpy(d_block, blockData, 16);
 431     AppendCrc14443a(d_block, 16);
 432
 433         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 434
 435         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 436
 437         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 438                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 439                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 440         return 2;
 441         }
 442     return 0;
 443 }
 444 */
 445
 446 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData) {
 447     uint16_t len = 0;
 448         uint8_t block[5] = {blockNo, 0x00, 0x00, 0x00, 0x00 };
 449         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
 450         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
 451
 452     // command MIFARE_CLASSIC_WRITEBLOCK
 453         memcpy(block+1, blockData, 4);
 454
 455         len = mifare_sendcmd( MIFARE_ULC_WRITE, block, sizeof(block), receivedAnswer, receivedAnswerPar, NULL);
 456
 457     if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 458                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 459                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 460         return 1;
 461     }
 462     return 0;
 463 }
 464 int mifare_classic_halt_ex(struct Crypto1State *pcs) {
 465         uint8_t receivedAnswer[4] = {0x00, 0x00, 0x00, 0x00};
 466         uint16_t len = mifare_sendcmd_short(pcs, (pcs == NULL) ? CRYPT_NONE : CRYPT_ALL, 0x50, 0x00, receivedAnswer, NULL, NULL);
 467         if (len != 0) {
 468                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("halt warning. response len: %x", len);
 469                 return 1;
 470         }
 471         return 0;
 472 }
 473 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) {
 474         return mifare_classic_halt_ex(pcs);
 475 }
 476
 477 int mifare_ultra_halt() {
 478         uint16_t len = 0;
 479         uint8_t receivedAnswer[4] = {0x00, 0x00, 0x00, 0x00};
 480         len = mifare_sendcmd_short(NULL, CRYPT_NONE, 0x50, 0x00, receivedAnswer, NULL, NULL);
 481         if (len != 0) {
 482                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("halt error. response len: %x", len);
 483                 return 1;
 484         }
 485         return 0;
 486 }
 487
 488
 489 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 490 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 491 uint8_t NumBlocksPerSector(uint8_t sectorNo) {
 492         return (sectorNo < 32) ? 4 : 16;
 493 }
 494
 495 uint8_t FirstBlockOfSector(uint8_t sectorNo) {
 496         if (sectorNo < 32)
 497                 return sectorNo * 4;
 498         else
 499                 return 32*4 + (sectorNo - 32) * 16;
 500
 501 }
 502
 503 // work with emulator memory
 504 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 505         emlSetMem_xt(data, blockNum, blocksCount, 16);
 506 }
 507
 508 void emlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) {
 509         uint8_t* emCARD = BigBuf_get_EM_addr();
 510         memcpy(emCARD + blockNum * blockBtWidth, data, blocksCount * blockBtWidth);
 511 }
 512
 513 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 514         uint8_t* emCARD = BigBuf_get_EM_addr();
 515         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 516 }
 517
 518 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 519         uint8_t* emCARD = BigBuf_get_EM_addr();
 520         memcpy(data, emCARD + bytePtr, byteCount);
 521 }
 522
 523 int emlCheckValBl(int blockNum) {
 524         uint8_t* emCARD = BigBuf_get_EM_addr();
 525         uint8_t* data = emCARD + blockNum * 16;
 526
 527         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 528                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 529                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 530                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 531                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 532                         (data[12] != (data[15] ^ 0xff))
 533                  )
 534                 return 1;
 535         return 0;
 536 }
 537
 538 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 539         uint8_t* emCARD = BigBuf_get_EM_addr();
 540         uint8_t* data = emCARD + blockNum * 16;
 541
 542         if (emlCheckValBl(blockNum))
 543                 return 1;
 544
 545         memcpy(blReg, data, 4);
 546         *blBlock = data[12];
 547         return 0;
 548 }
 549
 550 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 551         uint8_t* emCARD = BigBuf_get_EM_addr();
 552         uint8_t* data = emCARD + blockNum * 16;
 553
 554         memcpy(data + 0, &blReg, 4);
 555         memcpy(data + 8, &blReg, 4);
 556         blReg = blReg ^ 0xffffffff;
 557         memcpy(data + 4, &blReg, 4);
 558
 559         data[12] = blBlock;
 560         data[13] = blBlock ^ 0xff;
 561         data[14] = blBlock;
 562         data[15] = blBlock ^ 0xff;
 563
 564         return 0;
 565 }
 566
 567 uint64_t emlGetKey(int sectorNum, int keyType) {
 568         uint8_t key[6] = {0x00};
 569         uint8_t* emCARD = BigBuf_get_EM_addr();
 570         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 571         return bytes_to_num(key, 6);
 572 }
 573
 574 void emlClearMem(void) {
 575         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 576         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 577         uint8_t* emCARD = BigBuf_get_EM_addr();
 578         memset(emCARD, 0, CARD_MEMORY_SIZE);
 579
 580         // fill sectors trailer data
 581         for(uint8_t b = 3; b < 256; ((b < 127) ? (b += 4) : (b += 16)))
 582                 emlSetMem((uint8_t *)trailer, b, 1);
 583
 584         // uid
 585         emlSetMem((uint8_t *)uid, 0, 1);
 586         return;
 587 }
 588
 589
 590 // Mifare desfire commands
 591 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)
 592 {
 593     uint8_t dcmd[5] = {cmd, data[0], data[1], 0x00, 0x00};
 594         AppendCrc14443a(dcmd, 3);
 595
 596         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 597         int len = ReaderReceive(answer, answer_parity);
 598         if(!len) {
 599                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 600                         Dbprintf("Authentication failed. Card timeout.");
 601                 return 1;
 602     }
 603         return len;
 604 }
 605
 606 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)
 607 {
 608     uint8_t dcmd[20] = {0x00};
 609     dcmd[0] = cmd;
 610     memcpy(dcmd+1,data,17);
 611         AppendCrc14443a(dcmd, 18);
 612
 613         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 614         int len = ReaderReceive(answer, answer_parity);
 615         if(!len){
 616         if (MF_DBGLEVEL >= MF_DBG_ERROR)
 617                         Dbprintf("Authentication failed. Card timeout.");
 618                 return 1;
 619     }
 620         return len;
 621 }
 622
 623 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 624
 625         int len;
 626         // load key, keynumber
 627         uint8_t data[2]={0x0a, 0x00};
 628         uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
 629         uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
 630
 631         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 632         if (len == 1) {
 633                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 634                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 635                 return 1;
 636         }
 637
 638         if (len == 12) {
 639                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)     {
 640                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 641                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 642                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 643                                 receivedAnswer[10],receivedAnswer[11]);
 644                         }
 645                         memcpy(blockData, receivedAnswer, 12);
 646                 return 0;
 647         }
 648         return 1;
 649 }
 650
 651 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 652
 653         int len;
 654         uint8_t data[17] = {0x00};
 655         data[0] = 0xAF;
 656         memcpy(data+1,key,16);
 657
 658         uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
 659         uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
 660
 661         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 662
 663         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 664                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 665                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 666                 return 1;
 667         }
 668
 669         if (len == 12){
 670                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 671                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 672                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 673                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 674                                 receivedAnswer[10],receivedAnswer[11]);
 675                         }
 676                 memcpy(blockData, receivedAnswer, 12);
 677                 return 0;
 678         }
 679         return 1;
 680 }