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 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 409 {
 410         uint16_t len;
 411         uint8_t bt[2];
 412         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 413         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 414
 415
 416         len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 417         if (len == 1) {
 418                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 419                 return 1;
 420         }
 421         if (len != 18) {
 422                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 423                 return 2;
 424         }
 425
 426         memcpy(bt, receivedAnswer + 16, 2);
 427         AppendCrc14443a(receivedAnswer, 16);
 428         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 429                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 430                 return 3;
 431         }
 432
 433         memcpy(blockData, receivedAnswer, 14);
 434         return 0;
 435 }
 436
 437 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 438 {
 439         // variables
 440         uint16_t len, i;
 441         uint32_t pos;
 442         uint8_t par[3] = {0};           // enough for 18 Bytes to send
 443         byte_t res;
 444
 445         uint8_t d_block[18], d_block_enc[18];
 446         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 447         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 448
 449         // command MIFARE_CLASSIC_WRITEBLOCK
 450         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 451
 452         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 453                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 454                 return 1;
 455         }
 456
 457         memcpy(d_block, blockData, 16);
 458         AppendCrc14443a(d_block, 16);
 459
 460         // crypto
 461         for (pos = 0; pos < 18; pos++)
 462         {
 463                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 464                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 465         }
 466
 467         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 468
 469         // Receive the response
 470         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 471
 472         res = 0;
 473         for (i = 0; i < 4; i++)
 474                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 475
 476         if ((len != 1) || (res != 0x0A)) {
 477                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 478                 return 2;
 479         }
 480
 481         return 0;
 482 }
 483
 484 /* // command not needed, but left for future testing
 485 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 486 {
 487         uint16_t len;
 488         uint8_t par[3] = {0};  // enough for 18 parity bits
 489         uint8_t d_block[18] = {0x00};
 490         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 491         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 492
 493         len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 494
 495         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 496                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 497                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 498                 return 1;
 499         }
 500
 501         memcpy(d_block, blockData, 16);
 502         AppendCrc14443a(d_block, 16);
 503
 504         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 505
 506         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 507
 508         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 509                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 510                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 511                 return 2;
 512         }
 513         return 0;
 514 }
 515 */
 516
 517 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 518 {
 519         uint16_t len;
 520         uint8_t d_block[5] = {0x00};
 521         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 522         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 523
 524         // command MIFARE_CLASSIC_WRITEBLOCK
 525         d_block[0]= blockNo;
 526         memcpy(d_block+1,blockData,4);
 527         //AppendCrc14443a(d_block, 6);
 528
 529         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 530
 531         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 532                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 533                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 534                 return 1;
 535         }
 536         return 0;
 537 }
 538
 539 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 540 {
 541         uint16_t len;
 542         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 543         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 544
 545         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 546         if (len != 0) {
 547                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 548                         Dbprintf("halt error. response len: %x", len);
 549                 return 1;
 550         }
 551
 552         return 0;
 553 }
 554
 555 int mifare_ultra_halt()
 556 {
 557         uint16_t len;
 558         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 559         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 560
 561         len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 562         if (len != 0) {
 563                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 564                         Dbprintf("halt error. response len: %x", len);
 565                 return 1;
 566         }
 567         return 0;
 568 }
 569
 570
 571 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 572 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 573 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 574 {
 575         if (sectorNo < 32)
 576                 return 4;
 577         else
 578                 return 16;
 579 }
 580
 581 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 582 {
 583         if (sectorNo < 32)
 584                 return sectorNo * 4;
 585         else
 586                 return 32*4 + (sectorNo - 32) * 16;
 587
 588 }
 589
 590 uint8_t SectorTrailer(uint8_t blockNo)
 591 {
 592         if (blockNo < 32*4) {
 593                 return (blockNo | 0x03);
 594         } else {
 595                 return (blockNo | 0x0f);
 596         }
 597 }
 598
 599 bool IsSectorTrailer(uint8_t blockNo)
 600 {
 601         return (blockNo == SectorTrailer(blockNo));
 602 }
 603
 604 // work with emulator memory
 605 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 606         uint8_t* emCARD = BigBuf_get_EM_addr();
 607         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 608 }
 609
 610 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 611         uint8_t* emCARD = BigBuf_get_EM_addr();
 612         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 613 }
 614
 615 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 616         uint8_t* emCARD = BigBuf_get_EM_addr();
 617         memcpy(data, emCARD + bytePtr, byteCount);
 618 }
 619
 620 int emlCheckValBl(int blockNum) {
 621         uint8_t* emCARD = BigBuf_get_EM_addr();
 622         uint8_t* data = emCARD + blockNum * 16;
 623
 624         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 625                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 626                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 627                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 628                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 629                         (data[12] != (data[15] ^ 0xff))
 630                  )
 631                 return 1;
 632         return 0;
 633 }
 634
 635 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 636         uint8_t* emCARD = BigBuf_get_EM_addr();
 637         uint8_t* data = emCARD + blockNum * 16;
 638
 639         if (emlCheckValBl(blockNum)) {
 640                 return 1;
 641         }
 642
 643         memcpy(blReg, data, 4);
 644         *blBlock = data[12];
 645         return 0;
 646 }
 647
 648 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 649         uint8_t* emCARD = BigBuf_get_EM_addr();
 650         uint8_t* data = emCARD + blockNum * 16;
 651
 652         memcpy(data + 0, &blReg, 4);
 653         memcpy(data + 8, &blReg, 4);
 654         blReg = blReg ^ 0xffffffff;
 655         memcpy(data + 4, &blReg, 4);
 656
 657         data[12] = blBlock;
 658         data[13] = blBlock ^ 0xff;
 659         data[14] = blBlock;
 660         data[15] = blBlock ^ 0xff;
 661
 662         return 0;
 663 }
 664
 665 uint64_t emlGetKey(int sectorNum, int keyType) {
 666         uint8_t key[6];
 667         uint8_t* emCARD = BigBuf_get_EM_addr();
 668
 669         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 670         return bytes_to_num(key, 6);
 671 }
 672
 673 void emlClearMem(void) {
 674         int b;
 675
 676         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 677         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 678         uint8_t* emCARD = BigBuf_get_EM_addr();
 679
 680         memset(emCARD, 0, CARD_MEMORY_SIZE);
 681
 682         // fill sectors trailer data
 683         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 684                 emlSetMem((uint8_t *)trailer, b , 1);
 685         }
 686
 687         // uid
 688         emlSetMem((uint8_t *)uid, 0, 1);
 689         return;
 690 }
 691
 692
 693 // Mifare desfire commands
 694 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)
 695 {
 696     uint8_t dcmd[5] = {0x00};
 697     dcmd[0] = cmd;
 698     memcpy(dcmd+1,data,2);
 699         AppendCrc14443a(dcmd, 3);
 700
 701         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 702         int len = ReaderReceive(answer, answer_parity);
 703         if(!len) {
 704                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 705                         Dbprintf("Authentication failed. Card timeout.");
 706                 return 1;
 707     }
 708         return len;
 709 }
 710
 711 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)
 712 {
 713     uint8_t dcmd[20] = {0x00};
 714     dcmd[0] = cmd;
 715     memcpy(dcmd+1,data,17);
 716         AppendCrc14443a(dcmd, 18);
 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_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 729
 730         int len;
 731         // load key, keynumber
 732         uint8_t data[2]={0x0a, 0x00};
 733         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 734         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 735
 736         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 737         if (len == 1) {
 738                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 739                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 740                 return 1;
 741         }
 742
 743         if (len == 12) {
 744                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)     {
 745                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 746                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 747                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 748                                 receivedAnswer[10],receivedAnswer[11]);
 749                         }
 750                         memcpy(blockData, receivedAnswer, 12);
 751                 return 0;
 752         }
 753         return 1;
 754 }
 755
 756 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 757
 758         int len;
 759         uint8_t data[17] = {0x00};
 760         data[0] = 0xAF;
 761         memcpy(data+1,key,16);
 762
 763         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 764         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 765
 766         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 767
 768         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 769                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 770                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 771                 return 1;
 772         }
 773
 774         if (len == 12){
 775                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 776                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 777                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 778                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 779                                 receivedAnswer[10],receivedAnswer[11]);
 780                         }
 781                 memcpy(blockData, receivedAnswer, 12);
 782                 return 0;
 783         }
 784         return 1;
 785 }
 786
 787 //-----------------------------------------------------------------------------
 788 // MIFARE check keys
 789 //
 790 //-----------------------------------------------------------------------------
 791 // one key check
 792 int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 793
 794         struct Crypto1State mpcs = {0, 0};
 795         struct Crypto1State *pcs;
 796         pcs = &mpcs;
 797
 798         // Iceman: use piwi's faster nonce collecting part in hardnested.
 799         if (*cascade_levels == 0) { // need a full select cycle to get the uid first
 800                 iso14a_card_select_t card_info;
 801                 if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
 802                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card");
 803                         return  1;
 804                 }
 805                 switch (card_info.uidlen) {
 806                         case 4 : *cascade_levels = 1; break;
 807                         case 7 : *cascade_levels = 2; break;
 808                         case 10: *cascade_levels = 3; break;
 809                         default: break;
 810                 }
 811         } else { // no need for anticollision. We can directly select the card
 812                 if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
 813                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
 814                         return  1;
 815                 }
 816         }
 817
 818         if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
 819 //              SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
 820                 return 2;
 821         } else {
 822 /*              // let it be here. it like halt command, but maybe it will work in some strange cases
 823                 uint8_t dummy_answer = 0;
 824                 ReaderTransmit(&dummy_answer, 1, NULL);
 825                 int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
 826                 // wait for the card to become ready again
 827                 while(GetCountSspClk() < timeout) {};
 828 */
 829                 // it needs after success authentication
 830                 mifare_classic_halt(pcs, *cuid);
 831         }
 832
 833         return 0;
 834 }
 835
 836 // multi key check
 837 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 838         uint8_t uid[10];
 839         uint32_t cuid = 0;
 840         uint8_t cascade_levels = 0;
 841         uint64_t ui64Key = 0;
 842
 843         int retryCount = 0;
 844         for (uint8_t i = 0; i < keyCount; i++) {
 845
 846                 // Allow button press / usb cmd to interrupt device
 847                 if (BUTTON_PRESS() && !usb_poll_validate_length()) {
 848                         Dbprintf("ChkKeys: Cancel operation. Exit...");
 849                         return -2;
 850                 }
 851
 852                 ui64Key = bytes_to_num(keys + i * 6, 6);
 853                 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
 854
 855                 // can't select
 856                 if (res == 1) {
 857                         retryCount++;
 858                         if (retryCount >= 5) {
 859                                 Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
 860                                 return -1;
 861                         }
 862                         --i; // try the same key once again
 863
 864                         SpinDelay(20);
 865 //                      Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
 866                         continue;
 867                 }
 868
 869                 // can't authenticate
 870                 if (res == 2) {
 871                         retryCount = 0;
 872                         continue; // can't auth. wrong key.
 873                 }
 874
 875                 return i + 1;
 876         }
 877
 878         return 0;
 879 }
 880
 881 // multisector multikey check
 882 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
 883         int res = 0;
 884
 885 //      int clk = GetCountSspClk();
 886
 887         for(int sc = 0; sc < SectorCount; sc++){
 888                 WDT_HIT();
 889
 890                 int keyAB = keyType;
 891                 do {
 892                         res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
 893                         if (res < 0){
 894                                 return res;
 895                         }
 896                         if (res > 0){
 897                                 (*keyIndex)[keyAB & 0x01][sc] = res;
 898                         }
 899                 } while(--keyAB > 0);
 900         }
 901
 902 //      Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
 903
 904         return 0;
 905 }
 906
 907