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 "polarssl/des.h"
  25
  26 int MF_DBGLEVEL = MF_DBG_ALL;
  27
  28 // crypto1 helpers
  29 void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){
  30         uint8_t bt = 0;
  31         int i;
  32
  33         if (len != 1) {
  34                 for (i = 0; i < len; i++)
  35                         data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];
  36         } else {
  37                 bt = 0;
  38                 for (i = 0; i < 4; i++)
  39                         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i;
  40
  41                 data_out[0] = bt;
  42         }
  43         return;
  44 }
  45
  46 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  47         mf_crypto1_decryptEx(pcs, data, len, data);
  48 }
  49
  50 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  51         uint8_t bt = 0;
  52         int i;
  53         par[0] = 0;
  54
  55         for (i = 0; i < len; i++) {
  56                 bt = data[i];
  57                 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
  58                 if((i&0x0007) == 0)
  59                         par[i>>3] = 0;
  60                 par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007)));
  61         }
  62         return;
  63 }
  64
  65 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  66         uint8_t bt = 0;
  67         int i;
  68
  69         for (i = 0; i < 4; i++)
  70                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  71
  72         return bt;
  73 }
  74
  75 // send X byte basic commands
  76 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  77 {
  78         uint8_t dcmd[data_size+3];
  79         dcmd[0] = cmd;
  80         memcpy(dcmd+1,data,data_size);
  81         AppendCrc14443a(dcmd, data_size+1);
  82         ReaderTransmit(dcmd, sizeof(dcmd), timing);
  83         int len = ReaderReceive(answer, answer_parity);
  84         if(!len) {
  85                 if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("%02X Cmd failed. Card timeout.", cmd);
  86                         len = ReaderReceive(answer,answer_parity);
  87                 //return 0;
  88         }
  89         return len;
  90 }
  91
  92 // send 2 byte commands
  93 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)
  94 {
  95         uint8_t dcmd[4], ecmd[4];
  96         uint16_t pos, res;
  97         uint8_t par[1];                 // 1 Byte parity is enough here
  98         dcmd[0] = cmd;
  99         dcmd[1] = data;
 100         AppendCrc14443a(dcmd, 2);
 101
 102         memcpy(ecmd, dcmd, sizeof(dcmd));
 103
 104         if (crypted) {
 105                 par[0] = 0;
 106                 for (pos = 0; pos < 4; pos++)
 107                 {
 108                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 109                         par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
 110                 }
 111
 112                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 113
 114         } else {
 115                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 116         }
 117
 118         int len = ReaderReceive(answer, par);
 119
 120         if (answer_parity) *answer_parity = par[0];
 121
 122         if (crypted == CRYPT_ALL) {
 123                 if (len == 1) {
 124                         res = 0;
 125                         for (pos = 0; pos < 4; pos++)
 126                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 127
 128                         answer[0] = res;
 129
 130                 } else {
 131                         for (pos = 0; pos < len; pos++)
 132                         {
 133                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 134                         }
 135                 }
 136         }
 137
 138         return len;
 139 }
 140
 141 // mifare classic commands
 142 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
 143 {
 144         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 145 }
 146
 147 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)
 148 {
 149         // variables
 150         int len;
 151         uint32_t pos;
 152         uint8_t tmp4[4];
 153         uint8_t par[1] = {0x00};
 154         byte_t nr[4];
 155         uint32_t nt, ntpp; // Supplied tag nonce
 156
 157         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 158         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 159         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 160
 161         // Transmit MIFARE_CLASSIC_AUTH
 162         len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
 163         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 164         if (len != 4) return 1;
 165
 166         // "random" reader nonce:
 167         nr[0] = 0x55;
 168         nr[1] = 0x41;
 169         nr[2] = 0x49;
 170         nr[3] = 0x92;
 171
 172         // Save the tag nonce (nt)
 173         nt = bytes_to_num(receivedAnswer, 4);
 174
 175         //  ----------------------------- crypto1 create
 176         if (isNested)
 177                 crypto1_destroy(pcs);
 178
 179         // Init cipher with key
 180         crypto1_create(pcs, ui64Key);
 181
 182         if (isNested == AUTH_NESTED) {
 183                 // decrypt nt with help of new key
 184                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 185         } else {
 186                 // Load (plain) uid^nt into the cipher
 187                 crypto1_word(pcs, nt ^ uid, 0);
 188         }
 189
 190         // some statistic
 191         if (!ntptr && (MF_DBGLEVEL >= 3))
 192                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 193
 194         // save Nt
 195         if (ntptr)
 196                 *ntptr = nt;
 197
 198         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 199         par[0] = 0;
 200         for (pos = 0; pos < 4; pos++)
 201         {
 202                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 203                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
 204         }
 205
 206         // Skip 32 bits in pseudo random generator
 207         nt = prng_successor(nt,32);
 208
 209         //  ar+parity
 210         for (pos = 4; pos < 8; pos++)
 211         {
 212                 nt = prng_successor(nt,8);
 213                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 214                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos));
 215         }
 216
 217         // Transmit reader nonce and reader answer
 218         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 219
 220         // Receive 4 byte tag answer
 221         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 222         if (!len)
 223         {
 224                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 225                 return 2;
 226         }
 227
 228         memcpy(tmp4, receivedAnswer, 4);
 229         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 230
 231         if (ntpp != bytes_to_num(tmp4, 4)) {
 232                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 233                 return 3;
 234         }
 235
 236         return 0;
 237 }
 238
 239 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 240 {
 241         // variables
 242         int len;
 243         uint8_t bt[2];
 244
 245         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 246         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 247
 248         // command MIFARE_CLASSIC_READBLOCK
 249         len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 250         if (len == 1) {
 251                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 252                 return 1;
 253         }
 254         if (len != 18) {
 255                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 256                 return 2;
 257         }
 258
 259         memcpy(bt, receivedAnswer + 16, 2);
 260         AppendCrc14443a(receivedAnswer, 16);
 261         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 262                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 263                 return 3;
 264         }
 265
 266         memcpy(blockData, receivedAnswer, 16);
 267         return 0;
 268 }
 269
 270 // mifare ultralight commands
 271 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 272
 273         uint16_t len;
 274         uint8_t resp[4];
 275         uint8_t respPar[1];
 276         uint8_t key[4] = {0x00};
 277         memcpy(key, keybytes, 4);
 278
 279         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 280                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 281         len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL);
 282         //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 283         if (len != 4) {
 284                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 285                 return 0;
 286         }
 287
 288         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 289                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 290
 291         memcpy(pack, resp, 4);
 292         return 1;
 293 }
 294
 295 int mifare_ultra_auth(uint8_t *keybytes){
 296
 297         /// 3des2k
 298
 299         des3_context ctx = { 0x00 };
 300         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 301         uint8_t random_b[8] = {0x00};
 302         uint8_t enc_random_b[8] = {0x00};
 303         uint8_t rnd_ab[16] = {0x00};
 304         uint8_t IV[8] = {0x00};
 305         uint8_t key[16] = {0x00};
 306         memcpy(key, keybytes, 16);
 307
 308         uint16_t len;
 309         uint8_t resp[19] = {0x00};
 310         uint8_t respPar[3] = {0,0,0};
 311
 312         // REQUEST AUTHENTICATION
 313         len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);
 314         if (len != 11) {
 315                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 316                 return 0;
 317         }
 318
 319         // tag nonce.
 320         memcpy(enc_random_b,resp+1,8);
 321
 322         // decrypt nonce.
 323         // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
 324         des3_set2key_dec(&ctx, key);
 325         des3_crypt_cbc(&ctx     // des3_context
 326                 , DES_DECRYPT           // int mode
 327                 , sizeof(random_b)      // length
 328                 , IV                    // iv[8]
 329                 , enc_random_b          // input
 330                 , random_b                      // output
 331                 );
 332
 333         rol(random_b,8);
 334         memcpy(rnd_ab  ,random_a,8);
 335         memcpy(rnd_ab+8,random_b,8);
 336
 337         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 338                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 339                         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]);
 340
 341                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 342                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 343
 344                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 345                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 346
 347                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 348                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 349         }
 350
 351         // encrypt    out, in, length, key, iv
 352         //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 353         des3_set2key_enc(&ctx, key);
 354         des3_crypt_cbc(&ctx     // des3_context
 355                 , DES_ENCRYPT           // int mode
 356                 , sizeof(rnd_ab)        // length
 357                 , enc_random_b          // iv[8]
 358                 , rnd_ab                        // input
 359                 , rnd_ab                        // output
 360                 );
 361
 362         //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
 363         len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 364         if (len != 11) {
 365                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 366                 return 0;
 367         }
 368
 369         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 370         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 371         memcpy(enc_resp, resp+1, 8);
 372
 373         // decrypt    out, in, length, key, iv
 374         // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 375         des3_set2key_dec(&ctx, key);
 376         des3_crypt_cbc(&ctx     // des3_context
 377                 , DES_DECRYPT           // int mode
 378                 , 8                                     // length
 379                 , enc_random_b          // iv[8]
 380                 , enc_resp                      // input
 381                 , resp_random_a         // output
 382                 );
 383         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 384                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 385                 return 0;
 386         }
 387
 388         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 389                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 390                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 391                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 392
 393                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 394                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 395                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 396
 397                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 398                                 random_a[0],random_a[1],random_a[2],random_a[3],
 399                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 400
 401                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 402                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 403                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 404         }
 405         return 1;
 406 }
 407
 408
 409 #define MFU_MAX_RETRIES 5
 410 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 411 {
 412         uint16_t len;
 413         uint8_t bt[2];
 414         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 415         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 416         uint8_t retries;
 417         int result = 0;
 418
 419         for (retries = 0; retries < MFU_MAX_RETRIES; retries++) {
 420                 len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 421                 if (len == 1) {
 422                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 423                         result = 1;
 424                         continue;
 425                 }
 426                 if (len != 18) {
 427                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 428                         result = 2;
 429                         continue;
 430                 }
 431
 432                 memcpy(bt, receivedAnswer + 16, 2);
 433                 AppendCrc14443a(receivedAnswer, 16);
 434                 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 435                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 436                         result = 3;
 437                         continue;
 438                 }
 439
 440                 // No errors encountered; don't retry
 441                 result = 0;
 442                 break;
 443         }
 444
 445         if (result != 0) {
 446                 Dbprintf("Cmd Error: too many retries; read failed");
 447                 return result;
 448         }
 449
 450         memcpy(blockData, receivedAnswer, 14);
 451         return 0;
 452 }
 453
 454 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 455 {
 456         // variables
 457         uint16_t len, i;
 458         uint32_t pos;
 459         uint8_t par[3] = {0};           // enough for 18 Bytes to send
 460         byte_t res;
 461
 462         uint8_t d_block[18], d_block_enc[18];
 463         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 464         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 465
 466         // command MIFARE_CLASSIC_WRITEBLOCK
 467         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 468
 469         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 470                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 471                 return 1;
 472         }
 473
 474         memcpy(d_block, blockData, 16);
 475         AppendCrc14443a(d_block, 16);
 476
 477         // crypto
 478         for (pos = 0; pos < 18; pos++)
 479         {
 480                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 481                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 482         }
 483
 484         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 485
 486         // Receive the response
 487         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 488
 489         res = 0;
 490         for (i = 0; i < 4; i++)
 491                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 492
 493         if ((len != 1) || (res != 0x0A)) {
 494                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 495                 return 2;
 496         }
 497
 498         return 0;
 499 }
 500
 501 /* // command not needed, but left for future testing
 502 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 503 {
 504         uint16_t len;
 505         uint8_t par[3] = {0};  // enough for 18 parity bits
 506         uint8_t d_block[18] = {0x00};
 507         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 508         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 509
 510         len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 511
 512         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 513                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 514                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 515                 return 1;
 516         }
 517
 518         memcpy(d_block, blockData, 16);
 519         AppendCrc14443a(d_block, 16);
 520
 521         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 522
 523         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 524
 525         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 526                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 527                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 528                 return 2;
 529         }
 530         return 0;
 531 }
 532 */
 533
 534 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 535 {
 536         uint16_t len;
 537         uint8_t d_block[5] = {0x00};
 538         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 539         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 540
 541         // command MIFARE_CLASSIC_WRITEBLOCK
 542         d_block[0]= blockNo;
 543         memcpy(d_block+1,blockData,4);
 544         //AppendCrc14443a(d_block, 6);
 545
 546         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 547
 548         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 549                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 550                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 551                 return 1;
 552         }
 553         return 0;
 554 }
 555
 556 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 557 {
 558         uint16_t len;
 559         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 560         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 561
 562         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 563         if (len != 0) {
 564                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 565                         Dbprintf("halt error. response len: %x", len);
 566                 return 1;
 567         }
 568
 569         return 0;
 570 }
 571
 572 int mifare_ultra_halt()
 573 {
 574         uint16_t len;
 575         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 576         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 577
 578         len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 579         if (len != 0) {
 580                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 581                         Dbprintf("halt error. response len: %x", len);
 582                 return 1;
 583         }
 584         return 0;
 585 }
 586
 587
 588 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 589 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 590 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 591 {
 592         if (sectorNo < 32)
 593                 return 4;
 594         else
 595                 return 16;
 596 }
 597
 598 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 599 {
 600         if (sectorNo < 32)
 601                 return sectorNo * 4;
 602         else
 603                 return 32*4 + (sectorNo - 32) * 16;
 604
 605 }
 606
 607 uint8_t SectorTrailer(uint8_t blockNo)
 608 {
 609         if (blockNo < 32*4) {
 610                 return (blockNo | 0x03);
 611         } else {
 612                 return (blockNo | 0x0f);
 613         }
 614 }
 615
 616 bool IsSectorTrailer(uint8_t blockNo)
 617 {
 618         return (blockNo == SectorTrailer(blockNo));
 619 }
 620
 621 // work with emulator memory
 622 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 623         uint8_t* emCARD = BigBuf_get_EM_addr();
 624         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 625 }
 626
 627 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 628         uint8_t* emCARD = BigBuf_get_EM_addr();
 629         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 630 }
 631
 632 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 633         uint8_t* emCARD = BigBuf_get_EM_addr();
 634         memcpy(data, emCARD + bytePtr, byteCount);
 635 }
 636
 637 int emlCheckValBl(int blockNum) {
 638         uint8_t* emCARD = BigBuf_get_EM_addr();
 639         uint8_t* data = emCARD + blockNum * 16;
 640
 641         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 642                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 643                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 644                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 645                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 646                         (data[12] != (data[15] ^ 0xff))
 647                  )
 648                 return 1;
 649         return 0;
 650 }
 651
 652 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 653         uint8_t* emCARD = BigBuf_get_EM_addr();
 654         uint8_t* data = emCARD + blockNum * 16;
 655
 656         if (emlCheckValBl(blockNum)) {
 657                 return 1;
 658         }
 659
 660         memcpy(blReg, data, 4);
 661         *blBlock = data[12];
 662         return 0;
 663 }
 664
 665 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 666         uint8_t* emCARD = BigBuf_get_EM_addr();
 667         uint8_t* data = emCARD + blockNum * 16;
 668
 669         memcpy(data + 0, &blReg, 4);
 670         memcpy(data + 8, &blReg, 4);
 671         blReg = blReg ^ 0xffffffff;
 672         memcpy(data + 4, &blReg, 4);
 673
 674         data[12] = blBlock;
 675         data[13] = blBlock ^ 0xff;
 676         data[14] = blBlock;
 677         data[15] = blBlock ^ 0xff;
 678
 679         return 0;
 680 }
 681
 682 uint64_t emlGetKey(int sectorNum, int keyType) {
 683         uint8_t key[6];
 684         uint8_t* emCARD = BigBuf_get_EM_addr();
 685
 686         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 687         return bytes_to_num(key, 6);
 688 }
 689
 690 void emlClearMem(void) {
 691         int b;
 692
 693         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 694         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 695         uint8_t* emCARD = BigBuf_get_EM_addr();
 696
 697         memset(emCARD, 0, CARD_MEMORY_SIZE);
 698
 699         // fill sectors trailer data
 700         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 701                 emlSetMem((uint8_t *)trailer, b , 1);
 702         }
 703
 704         // uid
 705         emlSetMem((uint8_t *)uid, 0, 1);
 706         return;
 707 }
 708
 709
 710 // Mifare desfire commands
 711 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)
 712 {
 713     uint8_t dcmd[5] = {0x00};
 714     dcmd[0] = cmd;
 715     memcpy(dcmd+1,data,2);
 716         AppendCrc14443a(dcmd, 3);
 717
 718         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 719         int len = ReaderReceive(answer, answer_parity);
 720         if(!len) {
 721                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 722                         Dbprintf("Authentication failed. Card timeout.");
 723                 return 1;
 724     }
 725         return len;
 726 }
 727
 728 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)
 729 {
 730     uint8_t dcmd[20] = {0x00};
 731     dcmd[0] = cmd;
 732     memcpy(dcmd+1,data,17);
 733         AppendCrc14443a(dcmd, 18);
 734
 735         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 736         int len = ReaderReceive(answer, answer_parity);
 737         if(!len){
 738         if (MF_DBGLEVEL >= MF_DBG_ERROR)
 739                         Dbprintf("Authentication failed. Card timeout.");
 740                 return 1;
 741     }
 742         return len;
 743 }
 744
 745 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 746
 747         int len;
 748         // load key, keynumber
 749         uint8_t data[2]={0x0a, 0x00};
 750         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 751         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 752
 753         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 754         if (len == 1) {
 755                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 756                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 757                 return 1;
 758         }
 759
 760         if (len == 12) {
 761                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)     {
 762                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 763                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 764                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 765                                 receivedAnswer[10],receivedAnswer[11]);
 766                         }
 767                         memcpy(blockData, receivedAnswer, 12);
 768                 return 0;
 769         }
 770         return 1;
 771 }
 772
 773 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 774
 775         int len;
 776         uint8_t data[17] = {0x00};
 777         data[0] = 0xAF;
 778         memcpy(data+1,key,16);
 779
 780         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 781         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 782
 783         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 784
 785         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 786                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 787                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 788                 return 1;
 789         }
 790
 791         if (len == 12){
 792                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 793                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 794                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 795                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 796                                 receivedAnswer[10],receivedAnswer[11]);
 797                         }
 798                 memcpy(blockData, receivedAnswer, 12);
 799                 return 0;
 800         }
 801         return 1;
 802 }
 803
 804 //-----------------------------------------------------------------------------
 805 // MIFARE check keys
 806 //
 807 //-----------------------------------------------------------------------------
 808 // one key check
 809 int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 810
 811         struct Crypto1State mpcs = {0, 0};
 812         struct Crypto1State *pcs;
 813         pcs = &mpcs;
 814
 815         // Iceman: use piwi's faster nonce collecting part in hardnested.
 816         if (*cascade_levels == 0) { // need a full select cycle to get the uid first
 817                 iso14a_card_select_t card_info;
 818                 if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
 819                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card");
 820                         return  1;
 821                 }
 822                 switch (card_info.uidlen) {
 823                         case 4 : *cascade_levels = 1; break;
 824                         case 7 : *cascade_levels = 2; break;
 825                         case 10: *cascade_levels = 3; break;
 826                         default: break;
 827                 }
 828         } else { // no need for anticollision. We can directly select the card
 829                 if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
 830                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
 831                         return  1;
 832                 }
 833         }
 834
 835         if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
 836 //              SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
 837                 return 2;
 838         } else {
 839 /*              // let it be here. it like halt command, but maybe it will work in some strange cases
 840                 uint8_t dummy_answer = 0;
 841                 ReaderTransmit(&dummy_answer, 1, NULL);
 842                 int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
 843                 // wait for the card to become ready again
 844                 while(GetCountSspClk() < timeout) {};
 845 */
 846                 // it needs after success authentication
 847                 mifare_classic_halt(pcs, *cuid);
 848         }
 849
 850         return 0;
 851 }
 852
 853 // multi key check
 854 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 855         uint8_t uid[10];
 856         uint32_t cuid = 0;
 857         uint8_t cascade_levels = 0;
 858         uint64_t ui64Key = 0;
 859
 860         int retryCount = 0;
 861         for (uint8_t i = 0; i < keyCount; i++) {
 862
 863                 // Allow button press / usb cmd to interrupt device
 864                 if (BUTTON_PRESS() && !usb_poll_validate_length()) {
 865                         Dbprintf("ChkKeys: Cancel operation. Exit...");
 866                         return -2;
 867                 }
 868
 869                 ui64Key = bytes_to_num(keys + i * 6, 6);
 870                 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
 871
 872                 // can't select
 873                 if (res == 1) {
 874                         retryCount++;
 875                         if (retryCount >= 5) {
 876                                 Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
 877                                 return -1;
 878                         }
 879                         --i; // try the same key once again
 880
 881                         SpinDelay(20);
 882 //                      Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
 883                         continue;
 884                 }
 885
 886                 // can't authenticate
 887                 if (res == 2) {
 888                         retryCount = 0;
 889                         continue; // can't auth. wrong key.
 890                 }
 891
 892                 return i + 1;
 893         }
 894
 895         return 0;
 896 }
 897
 898 // multisector multikey check
 899 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
 900         int res = 0;
 901
 902 //      int clk = GetCountSspClk();
 903
 904         for(int sc = 0; sc < SectorCount; sc++){
 905                 WDT_HIT();
 906
 907                 int keyAB = keyType;
 908                 do {
 909                         res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
 910                         if (res < 0){
 911                                 return res;
 912                         }
 913                         if (res > 0){
 914                                 (*keyIndex)[keyAB & 0x01][sc] = res;
 915                         }
 916                 } while(--keyAB > 0);
 917         }
 918
 919 //      Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
 920
 921         return 0;
 922 }
 923
 924