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 "mifareutil.h"
  13
  14 #include <string.h>
  15 #include <stdbool.h>
  16
  17 #include "proxmark3.h"
  18 #include "apps.h"
  19 #include "util.h"
  20 #include "parity.h"
  21 #include "iso14443crc.h"
  22 #include "iso14443a.h"
  23 #include "crapto1/crapto1.h"
  24 #include "mbedtls/des.h"
  25 #include "protocols.h"
  26
  27 int MF_DBGLEVEL = MF_DBG_INFO;
  28
  29 // crypto1 helpers
  30 void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){
  31         uint8_t bt = 0;
  32         int i;
  33
  34         if (len != 1) {
  35                 for (i = 0; i < len; i++)
  36                         data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];
  37         } else {
  38                 bt = 0;
  39                 for (i = 0; i < 4; i++)
  40                         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i;
  41
  42                 data_out[0] = bt;
  43         }
  44         return;
  45 }
  46
  47 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  48         mf_crypto1_decryptEx(pcs, data, len, data);
  49 }
  50
  51 void mf_crypto1_encryptEx(struct Crypto1State *pcs, uint8_t *data, uint8_t *in, uint16_t len, uint8_t *par) {
  52         uint8_t bt = 0;
  53         int i;
  54         par[0] = 0;
  55
  56         for (i = 0; i < len; i++) {
  57                 bt = data[i];
  58                 data[i] = crypto1_byte(pcs, in==NULL?0x00:in[i], 0) ^ data[i];
  59                 if((i&0x0007) == 0)
  60                         par[i>>3] = 0;
  61                 par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007)));
  62         }
  63         return;
  64 }
  65
  66 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  67         mf_crypto1_encryptEx(pcs, data, NULL, len, par);
  68 }
  69
  70 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  71         uint8_t bt = 0;
  72         int i;
  73
  74         for (i = 0; i < 4; i++)
  75                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  76
  77         return bt;
  78 }
  79
  80 // send X byte basic commands
  81 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  82 {
  83         uint8_t dcmd[data_size+3];
  84         dcmd[0] = cmd;
  85         memcpy(dcmd+1,data,data_size);
  86         AppendCrc14443a(dcmd, data_size+1);
  87         ReaderTransmit(dcmd, sizeof(dcmd), timing);
  88         int len = ReaderReceive(answer, answer_parity);
  89         if(!len) {
  90                 if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("%02X Cmd failed. Card timeout.", cmd);
  91                         len = ReaderReceive(answer,answer_parity);
  92                 //return 0;
  93         }
  94         return len;
  95 }
  96
  97 // send 2 byte commands
  98 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)
  99 {
 100         uint8_t dcmd[4], ecmd[4];
 101         uint16_t pos, res;
 102         uint8_t par[1];         // 1 Byte parity is enough here
 103         dcmd[0] = cmd;
 104         dcmd[1] = data;
 105         AppendCrc14443a(dcmd, 2);
 106
 107         memcpy(ecmd, dcmd, sizeof(dcmd));
 108
 109         if (crypted) {
 110                 par[0] = 0;
 111                 for (pos = 0; pos < 4; pos++)
 112                 {
 113                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 114                         par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
 115                 }
 116
 117                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 118
 119         } else {
 120                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 121         }
 122
 123         int len = ReaderReceive(answer, par);
 124
 125         if (answer_parity) *answer_parity = par[0];
 126
 127         if (crypted == CRYPT_ALL) {
 128                 if (len == 1) {
 129                         res = 0;
 130                         for (pos = 0; pos < 4; pos++)
 131                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 132
 133                         answer[0] = res;
 134
 135                 } else {
 136                         for (pos = 0; pos < len; pos++)
 137                         {
 138                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 139                         }
 140                 }
 141         }
 142
 143         return len;
 144 }
 145
 146 // mifare classic commands
 147 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
 148 {
 149         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 150 }
 151
 152 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)
 153 {
 154         // variables
 155         int len;
 156         uint32_t pos;
 157         uint8_t tmp4[4];
 158         uint8_t par[1] = {0x00};
 159         byte_t nr[4];
 160         uint32_t nt, ntpp; // Supplied tag nonce
 161
 162         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 163         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 164         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 165
 166         // Transmit MIFARE_CLASSIC_AUTH
 167         len = mifare_sendcmd_short(pcs, isNested, keyType & 0x01 ? MIFARE_AUTH_KEYB : MIFARE_AUTH_KEYA, blockNo, receivedAnswer, receivedAnswerPar, timing);
 168         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 169         if (len != 4) return 1;
 170
 171         // "random" reader nonce:
 172         nr[0] = 0x55;
 173         nr[1] = 0x41;
 174         nr[2] = 0x49;
 175         nr[3] = 0x92;
 176
 177         // Save the tag nonce (nt)
 178         nt = bytes_to_num(receivedAnswer, 4);
 179
 180         //  ----------------------------- crypto1 create
 181         if (isNested)
 182                 crypto1_destroy(pcs);
 183
 184         // Init cipher with key
 185         crypto1_create(pcs, ui64Key);
 186
 187         if (isNested == AUTH_NESTED) {
 188                 // decrypt nt with help of new key
 189                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 190         } else {
 191                 // Load (plain) uid^nt into the cipher
 192                 crypto1_word(pcs, nt ^ uid, 0);
 193         }
 194
 195         // some statistic
 196         if (!ntptr && (MF_DBGLEVEL >= 3))
 197                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 198
 199         // save Nt
 200         if (ntptr)
 201                 *ntptr = nt;
 202
 203         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 204         par[0] = 0;
 205         for (pos = 0; pos < 4; pos++)
 206         {
 207                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 208                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
 209         }
 210
 211         // Skip 32 bits in pseudo random generator
 212         nt = prng_successor(nt,32);
 213
 214         //  ar+parity
 215         for (pos = 4; pos < 8; pos++)
 216         {
 217                 nt = prng_successor(nt,8);
 218                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 219                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos));
 220         }
 221
 222         // Transmit reader nonce and reader answer
 223         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 224
 225         // Receive 4 byte tag answer
 226         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 227         if (!len)
 228         {
 229                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 230                 return 2;
 231         }
 232
 233         memcpy(tmp4, receivedAnswer, 4);
 234         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 235
 236         if (ntpp != bytes_to_num(tmp4, 4)) {
 237                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 238                 return 3;
 239         }
 240
 241         return 0;
 242 }
 243
 244 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 245 {
 246         // variables
 247         int len;
 248         uint8_t bt[2];
 249
 250         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 251         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 252
 253         // command MIFARE_CLASSIC_READBLOCK
 254         len = mifare_sendcmd_short(pcs, 1, MIFARE_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 255         if (len == 1) {
 256                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 257                 return 1;
 258         }
 259         if (len != 18) {
 260                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 261                 return 2;
 262         }
 263
 264         memcpy(bt, receivedAnswer + 16, 2);
 265         AppendCrc14443a(receivedAnswer, 16);
 266         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 267                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 268                 return 3;
 269         }
 270
 271         memcpy(blockData, receivedAnswer, 16);
 272         return 0;
 273 }
 274
 275 // mifare ultralight commands
 276 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 277
 278         uint16_t len;
 279         uint8_t resp[4];
 280         uint8_t respPar[1];
 281         uint8_t key[4] = {0x00};
 282         memcpy(key, keybytes, 4);
 283
 284         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 285                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 286         len = mifare_sendcmd(MIFARE_ULEV1_AUTH, key, sizeof(key), resp, respPar, NULL);
 287         //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 288         if (len != 4) {
 289                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 290                 return 0;
 291         }
 292
 293         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 294                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 295
 296         memcpy(pack, resp, 4);
 297         return 1;
 298 }
 299
 300 int mifare_ultra_auth(uint8_t *keybytes){
 301
 302         /// 3des2k
 303
 304         mbedtls_des3_context ctx = { {0} };
 305         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 306         uint8_t random_b[8] = {0x00};
 307         uint8_t enc_random_b[8] = {0x00};
 308         uint8_t rnd_ab[16] = {0x00};
 309         uint8_t IV[8] = {0x00};
 310         uint8_t key[16] = {0x00};
 311         memcpy(key, keybytes, 16);
 312
 313         uint16_t len;
 314         uint8_t resp[19] = {0x00};
 315         uint8_t respPar[3] = {0,0,0};
 316
 317         // REQUEST AUTHENTICATION
 318         len = mifare_sendcmd_short(NULL, 1, MIFARE_ULC_AUTH_1, 0x00, resp, respPar ,NULL);
 319         if (len != 11) {
 320                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 321                 return 0;
 322         }
 323
 324         // tag nonce.
 325         memcpy(enc_random_b,resp+1,8);
 326
 327         // decrypt nonce.
 328         // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
 329         mbedtls_des3_set2key_dec(&ctx, key);
 330         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 331                 , MBEDTLS_DES_DECRYPT       // int mode
 332                 , sizeof(random_b)  // length
 333                 , IV                // iv[8]
 334                 , enc_random_b      // input
 335                 , random_b          // output
 336                 );
 337
 338         rol(random_b,8);
 339         memcpy(rnd_ab  ,random_a,8);
 340         memcpy(rnd_ab+8,random_b,8);
 341
 342         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 343                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 344                         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]);
 345
 346                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 347                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 348
 349                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 350                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 351
 352                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 353                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 354         }
 355
 356         // encrypt    out, in, length, key, iv
 357         //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 358         mbedtls_des3_set2key_enc(&ctx, key);
 359         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 360                 , MBEDTLS_DES_ENCRYPT       // int mode
 361                 , sizeof(rnd_ab)    // length
 362                 , enc_random_b      // iv[8]
 363                 , rnd_ab            // input
 364                 , rnd_ab            // output
 365                 );
 366
 367         //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
 368         len = mifare_sendcmd(MIFARE_ULC_AUTH_2, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 369         if (len != 11) {
 370                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 371                 return 0;
 372         }
 373
 374         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 375         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 376         memcpy(enc_resp, resp+1, 8);
 377
 378         // decrypt    out, in, length, key, iv
 379         // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 380         mbedtls_des3_set2key_dec(&ctx, key);
 381         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 382                 , MBEDTLS_DES_DECRYPT       // int mode
 383                 , 8                 // length
 384                 , enc_random_b      // iv[8]
 385                 , enc_resp          // input
 386                 , resp_random_a     // output
 387                 );
 388         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 389                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 390                 return 0;
 391         }
 392
 393         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 394                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 395                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 396                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 397
 398                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 399                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 400                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 401
 402                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 403                                 random_a[0],random_a[1],random_a[2],random_a[3],
 404                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 405
 406                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 407                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 408                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 409         }
 410         return 1;
 411 }
 412
 413
 414 #define MFU_MAX_RETRIES 5
 415 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 416 {
 417         uint16_t len;
 418         uint8_t bt[2];
 419         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 420         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 421         uint8_t retries;
 422         int result = 0;
 423
 424         for (retries = 0; retries < MFU_MAX_RETRIES; retries++) {
 425                 len = mifare_sendcmd_short(NULL, 1, MIFARE_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 426                 if (len == 1) {
 427                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 428                         result = 1;
 429                         continue;
 430                 }
 431                 if (len != 18) {
 432                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 433                         result = 2;
 434                         continue;
 435                 }
 436
 437                 memcpy(bt, receivedAnswer + 16, 2);
 438                 AppendCrc14443a(receivedAnswer, 16);
 439                 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 440                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 441                         result = 3;
 442                         continue;
 443                 }
 444
 445                 // No errors encountered; don't retry
 446                 result = 0;
 447                 break;
 448         }
 449
 450         if (result != 0) {
 451                 Dbprintf("Cmd Error: too many retries; read failed");
 452                 return result;
 453         }
 454
 455         memcpy(blockData, receivedAnswer, 16);
 456         return 0;
 457 }
 458
 459 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 460 {
 461         // variables
 462         uint16_t len, i;
 463         uint32_t pos;
 464         uint8_t par[3] = {0};       // enough for 18 Bytes to send
 465         byte_t res;
 466
 467         uint8_t d_block[18], d_block_enc[18];
 468         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 469         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 470
 471         // command MIFARE_CLASSIC_WRITEBLOCK
 472         len = mifare_sendcmd_short(pcs, 1, MIFARE_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 473
 474         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 475                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 476                 return 1;
 477         }
 478
 479         memcpy(d_block, blockData, 16);
 480         AppendCrc14443a(d_block, 16);
 481
 482         // crypto
 483         for (pos = 0; pos < 18; pos++)
 484         {
 485                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 486                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 487         }
 488
 489         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 490
 491         // Receive the response
 492         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 493
 494         res = 0;
 495         for (i = 0; i < 4; i++)
 496                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 497
 498         if ((len != 1) || (res != 0x0A)) {
 499                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 500                 return 2;
 501         }
 502
 503         return 0;
 504 }
 505
 506 /* // command not needed, but left for future testing
 507 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 508 {
 509         uint16_t len;
 510         uint8_t par[3] = {0};  // enough for 18 parity bits
 511         uint8_t d_block[18] = {0x00};
 512         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 513         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 514
 515         len = mifare_sendcmd_short(NULL, true, MIFARE_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 516
 517         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 518                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 519                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 520                 return 1;
 521         }
 522
 523         memcpy(d_block, blockData, 16);
 524         AppendCrc14443a(d_block, 16);
 525
 526         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 527
 528         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 529
 530         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 531                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 532                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 533                 return 2;
 534         }
 535         return 0;
 536 }
 537 */
 538
 539 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 540 {
 541         uint16_t len;
 542         uint8_t d_block[5] = {0x00};
 543         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 544         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 545
 546         // command MIFARE_CLASSIC_WRITEBLOCK
 547         d_block[0]= blockNo;
 548         memcpy(d_block+1,blockData,4);
 549         //AppendCrc14443a(d_block, 6);
 550
 551         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 552
 553         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 554                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 555                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 556                 return 1;
 557         }
 558         return 0;
 559 }
 560
 561 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 562 {
 563         uint16_t len;
 564         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 565         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 566
 567         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, ISO14443A_CMD_HALT, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 568         if (len != 0) {
 569                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 570                         Dbprintf("halt error. response len: %x", len);
 571                 return 1;
 572         }
 573
 574         return 0;
 575 }
 576
 577 int mifare_ultra_halt()
 578 {
 579         uint16_t len;
 580         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 581         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 582
 583         len = mifare_sendcmd_short(NULL, true, ISO14443A_CMD_HALT, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 584         if (len != 0) {
 585                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 586                         Dbprintf("halt error. response len: %x", len);
 587                 return 1;
 588         }
 589         return 0;
 590 }
 591
 592
 593 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 594 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 595 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 596 {
 597         if (sectorNo < 32)
 598                 return 4;
 599         else
 600                 return 16;
 601 }
 602
 603 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 604 {
 605         if (sectorNo < 32)
 606                 return sectorNo * 4;
 607         else
 608                 return 32*4 + (sectorNo - 32) * 16;
 609
 610 }
 611
 612 uint8_t SectorTrailer(uint8_t blockNo)
 613 {
 614         if (blockNo < 32*4) {
 615                 return (blockNo | 0x03);
 616         } else {
 617                 return (blockNo | 0x0f);
 618         }
 619 }
 620
 621 bool IsSectorTrailer(uint8_t blockNo)
 622 {
 623         return (blockNo == SectorTrailer(blockNo));
 624 }
 625
 626 // work with emulator memory
 627 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 628         uint8_t* emCARD = BigBuf_get_EM_addr();
 629         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 630 }
 631
 632 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 633         uint8_t* emCARD = BigBuf_get_EM_addr();
 634         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 635 }
 636
 637 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 638         uint8_t* emCARD = BigBuf_get_EM_addr();
 639         memcpy(data, emCARD + bytePtr, byteCount);
 640 }
 641
 642 int emlCheckValBl(int blockNum) {
 643         uint8_t* emCARD = BigBuf_get_EM_addr();
 644         uint8_t* data = emCARD + blockNum * 16;
 645
 646         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 647                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 648                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 649                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 650                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 651                         (data[12] != (data[15] ^ 0xff))
 652                  )
 653                 return 1;
 654         return 0;
 655 }
 656
 657 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 658         uint8_t* emCARD = BigBuf_get_EM_addr();
 659         uint8_t* data = emCARD + blockNum * 16;
 660
 661         if (emlCheckValBl(blockNum)) {
 662                 return 1;
 663         }
 664
 665         memcpy(blReg, data, 4);
 666         *blBlock = data[12];
 667         return 0;
 668 }
 669
 670 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 671         uint8_t* emCARD = BigBuf_get_EM_addr();
 672         uint8_t* data = emCARD + blockNum * 16;
 673
 674         memcpy(data + 0, &blReg, 4);
 675         memcpy(data + 8, &blReg, 4);
 676         blReg = blReg ^ 0xffffffff;
 677         memcpy(data + 4, &blReg, 4);
 678
 679         data[12] = blBlock;
 680         data[13] = blBlock ^ 0xff;
 681         data[14] = blBlock;
 682         data[15] = blBlock ^ 0xff;
 683
 684         return 0;
 685 }
 686
 687 uint64_t emlGetKey(int sectorNum, int keyType) {
 688         uint8_t key[6];
 689         uint8_t* emCARD = BigBuf_get_EM_addr();
 690
 691         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 692         return bytes_to_num(key, 6);
 693 }
 694
 695 void emlClearMem(void) {
 696         int b;
 697
 698         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 699         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 700         uint8_t* emCARD = BigBuf_get_EM_addr();
 701
 702         memset(emCARD, 0, CARD_MEMORY_SIZE);
 703
 704         // fill sectors trailer data
 705         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 706                 emlSetMem((uint8_t *)trailer, b , 1);
 707         }
 708
 709         // uid
 710         emlSetMem((uint8_t *)uid, 0, 1);
 711         return;
 712 }
 713
 714
 715 // Mifare desfire commands
 716 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)
 717 {
 718         uint8_t dcmd[5] = {0x00};
 719         dcmd[0] = cmd;
 720         memcpy(dcmd+1,data,2);
 721         AppendCrc14443a(dcmd, 3);
 722
 723         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 724         int len = ReaderReceive(answer, answer_parity);
 725         if(!len) {
 726                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 727                         Dbprintf("Authentication failed. Card timeout.");
 728                 return 1;
 729         }
 730         return len;
 731 }
 732
 733 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)
 734 {
 735         uint8_t dcmd[20] = {0x00};
 736         dcmd[0] = cmd;
 737         memcpy(dcmd+1,data,17);
 738         AppendCrc14443a(dcmd, 18);
 739
 740         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 741         int len = ReaderReceive(answer, answer_parity);
 742         if(!len){
 743                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 744                         Dbprintf("Authentication failed. Card timeout.");
 745                 return 1;
 746         }
 747         return len;
 748 }
 749
 750 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 751
 752         int len;
 753         // load key, keynumber
 754         uint8_t data[2]={0x0a, 0x00};
 755         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 756         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 757
 758         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 759         if (len == 1) {
 760                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 761                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 762                 return 1;
 763         }
 764
 765         if (len == 12) {
 766                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 767                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 768                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 769                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 770                                 receivedAnswer[10],receivedAnswer[11]);
 771                         }
 772                         memcpy(blockData, receivedAnswer, 12);
 773                         return 0;
 774         }
 775         return 1;
 776 }
 777
 778 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 779
 780         int len;
 781         uint8_t data[17] = {0x00};
 782         data[0] = 0xAF;
 783         memcpy(data+1,key,16);
 784
 785         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 786         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 787
 788         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 789
 790         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 791                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 792                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 793                 return 1;
 794         }
 795
 796         if (len == 12){
 797                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 798                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 799                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 800                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 801                                 receivedAnswer[10],receivedAnswer[11]);
 802                         }
 803                 memcpy(blockData, receivedAnswer, 12);
 804                 return 0;
 805         }
 806         return 1;
 807 }
 808
 809 //-----------------------------------------------------------------------------
 810 // MIFARE check keys
 811 //
 812 //-----------------------------------------------------------------------------
 813 // one key check
 814 int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 815
 816         struct Crypto1State mpcs = {0, 0};
 817         struct Crypto1State *pcs;
 818         pcs = &mpcs;
 819
 820         // Iceman: use piwi's faster nonce collecting part in hardnested.
 821         if (*cascade_levels == 0) { // need a full select cycle to get the uid first
 822                 iso14a_card_select_t card_info;
 823                 if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
 824                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card");
 825                         return  1;
 826                 }
 827                 switch (card_info.uidlen) {
 828                         case 4 : *cascade_levels = 1; break;
 829                         case 7 : *cascade_levels = 2; break;
 830                         case 10: *cascade_levels = 3; break;
 831                         default: break;
 832                 }
 833         } else { // no need for anticollision. We can directly select the card
 834                 if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
 835                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
 836                         return  1;
 837                 }
 838         }
 839
 840         if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
 841 //      SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
 842                 return 2;
 843         } else {
 844 /*      // let it be here. it like halt command, but maybe it will work in some strange cases
 845                 uint8_t dummy_answer = 0;
 846                 ReaderTransmit(&dummy_answer, 1, NULL);
 847                 int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
 848                 // wait for the card to become ready again
 849                 while(GetCountSspClk() < timeout) {};
 850 */
 851                 // it needs after success authentication
 852                 mifare_classic_halt(pcs, *cuid);
 853         }
 854
 855         return 0;
 856 }
 857
 858 // multi key check
 859 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 860         uint8_t uid[10];
 861         uint32_t cuid = 0;
 862         uint8_t cascade_levels = 0;
 863         uint64_t ui64Key = 0;
 864
 865         int retryCount = 0;
 866         for (uint8_t i = 0; i < keyCount; i++) {
 867
 868                 // Allow button press / usb cmd to interrupt device
 869                 if (BUTTON_PRESS() && !usb_poll_validate_length()) {
 870                         Dbprintf("ChkKeys: Cancel operation. Exit...");
 871                         return -2;
 872                 }
 873
 874                 ui64Key = bytes_to_num(keys + i * 6, 6);
 875                 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
 876
 877                 // can't select
 878                 if (res == 1) {
 879                         retryCount++;
 880                         if (retryCount >= 5) {
 881                                 Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
 882                                 return -1;
 883                         }
 884                         --i; // try the same key once again
 885
 886                         SpinDelay(20);
 887 //          Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
 888                         continue;
 889                 }
 890
 891                 // can't authenticate
 892                 if (res == 2) {
 893                         retryCount = 0;
 894                         continue; // can't auth. wrong key.
 895                 }
 896
 897                 return i + 1;
 898         }
 899
 900         return 0;
 901 }
 902
 903 // multisector multikey check
 904 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
 905         int res = 0;
 906
 907 //  int clk = GetCountSspClk();
 908
 909         for(int sc = 0; sc < SectorCount; sc++){
 910                 WDT_HIT();
 911
 912                 int keyAB = keyType;
 913                 do {
 914                         res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
 915                         if (res < 0){
 916                                 return res;
 917                         }
 918                         if (res > 0){
 919                                 (*keyIndex)[keyAB & 0x01][sc] = res;
 920                         }
 921                 } while(--keyAB > 0);
 922         }
 923
 924 //  Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
 925
 926         return 0;
 927 }
 928
 929