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
  26 int MF_DBGLEVEL = MF_DBG_INFO;
  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_encryptEx(struct Crypto1State *pcs, uint8_t *data, uint8_t *in, 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, in==NULL?0x00:in[i], 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 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  66         mf_crypto1_encryptEx(pcs, data, NULL, len, par);
  67 }
  68
  69 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  70         uint8_t bt = 0;
  71         int i;
  72
  73         for (i = 0; i < 4; i++)
  74                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  75
  76         return bt;
  77 }
  78
  79 // send X byte basic commands
  80 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  81 {
  82         uint8_t dcmd[data_size+3];
  83         dcmd[0] = cmd;
  84         memcpy(dcmd+1,data,data_size);
  85         AppendCrc14443a(dcmd, data_size+1);
  86         ReaderTransmit(dcmd, sizeof(dcmd), timing);
  87         int len = ReaderReceive(answer, answer_parity);
  88         if(!len) {
  89                 if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("%02X Cmd failed. Card timeout.", cmd);
  90                         len = ReaderReceive(answer,answer_parity);
  91                 //return 0;
  92         }
  93         return len;
  94 }
  95
  96 // send 2 byte commands
  97 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)
  98 {
  99         uint8_t dcmd[4], ecmd[4];
 100         uint16_t pos, res;
 101         uint8_t par[1];         // 1 Byte parity is enough here
 102         dcmd[0] = cmd;
 103         dcmd[1] = data;
 104         AppendCrc14443a(dcmd, 2);
 105
 106         memcpy(ecmd, dcmd, sizeof(dcmd));
 107
 108         if (crypted) {
 109                 par[0] = 0;
 110                 for (pos = 0; pos < 4; pos++)
 111                 {
 112                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 113                         par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
 114                 }
 115
 116                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 117
 118         } else {
 119                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 120         }
 121
 122         int len = ReaderReceive(answer, par);
 123
 124         if (answer_parity) *answer_parity = par[0];
 125
 126         if (crypted == CRYPT_ALL) {
 127                 if (len == 1) {
 128                         res = 0;
 129                         for (pos = 0; pos < 4; pos++)
 130                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 131
 132                         answer[0] = res;
 133
 134                 } else {
 135                         for (pos = 0; pos < len; pos++)
 136                         {
 137                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 138                         }
 139                 }
 140         }
 141
 142         return len;
 143 }
 144
 145 // mifare classic commands
 146 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
 147 {
 148         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
 149 }
 150
 151 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)
 152 {
 153         // variables
 154         int len;
 155         uint32_t pos;
 156         uint8_t tmp4[4];
 157         uint8_t par[1] = {0x00};
 158         byte_t nr[4];
 159         uint32_t nt, ntpp; // Supplied tag nonce
 160
 161         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 162         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 163         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 164
 165         // Transmit MIFARE_CLASSIC_AUTH
 166         len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
 167         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 168         if (len != 4) return 1;
 169
 170         // "random" reader nonce:
 171         nr[0] = 0x55;
 172         nr[1] = 0x41;
 173         nr[2] = 0x49;
 174         nr[3] = 0x92;
 175
 176         // Save the tag nonce (nt)
 177         nt = bytes_to_num(receivedAnswer, 4);
 178
 179         //  ----------------------------- crypto1 create
 180         if (isNested)
 181                 crypto1_destroy(pcs);
 182
 183         // Init cipher with key
 184         crypto1_create(pcs, ui64Key);
 185
 186         if (isNested == AUTH_NESTED) {
 187                 // decrypt nt with help of new key
 188                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 189         } else {
 190                 // Load (plain) uid^nt into the cipher
 191                 crypto1_word(pcs, nt ^ uid, 0);
 192         }
 193
 194         // some statistic
 195         if (!ntptr && (MF_DBGLEVEL >= 3))
 196                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 197
 198         // save Nt
 199         if (ntptr)
 200                 *ntptr = nt;
 201
 202         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 203         par[0] = 0;
 204         for (pos = 0; pos < 4; pos++)
 205         {
 206                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 207                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
 208         }
 209
 210         // Skip 32 bits in pseudo random generator
 211         nt = prng_successor(nt,32);
 212
 213         //  ar+parity
 214         for (pos = 4; pos < 8; pos++)
 215         {
 216                 nt = prng_successor(nt,8);
 217                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 218                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos));
 219         }
 220
 221         // Transmit reader nonce and reader answer
 222         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 223
 224         // Receive 4 byte tag answer
 225         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 226         if (!len)
 227         {
 228                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 229                 return 2;
 230         }
 231
 232         memcpy(tmp4, receivedAnswer, 4);
 233         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 234
 235         if (ntpp != bytes_to_num(tmp4, 4)) {
 236                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 237                 return 3;
 238         }
 239
 240         return 0;
 241 }
 242
 243 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 244 {
 245         // variables
 246         int len;
 247         uint8_t bt[2];
 248
 249         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 250         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 251
 252         // command MIFARE_CLASSIC_READBLOCK
 253         len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 254         if (len == 1) {
 255                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 256                 return 1;
 257         }
 258         if (len != 18) {
 259                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 260                 return 2;
 261         }
 262
 263         memcpy(bt, receivedAnswer + 16, 2);
 264         AppendCrc14443a(receivedAnswer, 16);
 265         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 266                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 267                 return 3;
 268         }
 269
 270         memcpy(blockData, receivedAnswer, 16);
 271         return 0;
 272 }
 273
 274 // mifare ultralight commands
 275 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 276
 277         uint16_t len;
 278         uint8_t resp[4];
 279         uint8_t respPar[1];
 280         uint8_t key[4] = {0x00};
 281         memcpy(key, keybytes, 4);
 282
 283         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 284                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 285         len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL);
 286         //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 287         if (len != 4) {
 288                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 289                 return 0;
 290         }
 291
 292         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 293                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 294
 295         memcpy(pack, resp, 4);
 296         return 1;
 297 }
 298
 299 int mifare_ultra_auth(uint8_t *keybytes){
 300
 301         /// 3des2k
 302
 303         mbedtls_des3_context ctx = { {0} };
 304         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 305         uint8_t random_b[8] = {0x00};
 306         uint8_t enc_random_b[8] = {0x00};
 307         uint8_t rnd_ab[16] = {0x00};
 308         uint8_t IV[8] = {0x00};
 309         uint8_t key[16] = {0x00};
 310         memcpy(key, keybytes, 16);
 311
 312         uint16_t len;
 313         uint8_t resp[19] = {0x00};
 314         uint8_t respPar[3] = {0,0,0};
 315
 316         // REQUEST AUTHENTICATION
 317         len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);
 318         if (len != 11) {
 319                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 320                 return 0;
 321         }
 322
 323         // tag nonce.
 324         memcpy(enc_random_b,resp+1,8);
 325
 326         // decrypt nonce.
 327         // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
 328         mbedtls_des3_set2key_dec(&ctx, key);
 329         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 330                 , MBEDTLS_DES_DECRYPT       // int mode
 331                 , sizeof(random_b)  // length
 332                 , IV                // iv[8]
 333                 , enc_random_b      // input
 334                 , random_b          // output
 335                 );
 336
 337         rol(random_b,8);
 338         memcpy(rnd_ab  ,random_a,8);
 339         memcpy(rnd_ab+8,random_b,8);
 340
 341         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 342                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 343                         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]);
 344
 345                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 346                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 347
 348                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 349                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 350
 351                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 352                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 353         }
 354
 355         // encrypt    out, in, length, key, iv
 356         //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 357         mbedtls_des3_set2key_enc(&ctx, key);
 358         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 359                 , MBEDTLS_DES_ENCRYPT       // int mode
 360                 , sizeof(rnd_ab)    // length
 361                 , enc_random_b      // iv[8]
 362                 , rnd_ab            // input
 363                 , rnd_ab            // output
 364                 );
 365
 366         //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
 367         len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 368         if (len != 11) {
 369                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 370                 return 0;
 371         }
 372
 373         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 374         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 375         memcpy(enc_resp, resp+1, 8);
 376
 377         // decrypt    out, in, length, key, iv
 378         // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 379         mbedtls_des3_set2key_dec(&ctx, key);
 380         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 381                 , MBEDTLS_DES_DECRYPT       // int mode
 382                 , 8                 // length
 383                 , enc_random_b      // iv[8]
 384                 , enc_resp          // input
 385                 , resp_random_a     // output
 386                 );
 387         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 388                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 389                 return 0;
 390         }
 391
 392         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 393                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 394                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 395                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 396
 397                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 398                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 399                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 400
 401                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 402                                 random_a[0],random_a[1],random_a[2],random_a[3],
 403                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 404
 405                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 406                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 407                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 408         }
 409         return 1;
 410 }
 411
 412
 413 #define MFU_MAX_RETRIES 5
 414 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 415 {
 416         uint16_t len;
 417         uint8_t bt[2];
 418         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 419         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 420         uint8_t retries;
 421         int result = 0;
 422
 423         for (retries = 0; retries < MFU_MAX_RETRIES; retries++) {
 424                 len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 425                 if (len == 1) {
 426                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 427                         result = 1;
 428                         continue;
 429                 }
 430                 if (len != 18) {
 431                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 432                         result = 2;
 433                         continue;
 434                 }
 435
 436                 memcpy(bt, receivedAnswer + 16, 2);
 437                 AppendCrc14443a(receivedAnswer, 16);
 438                 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 439                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 440                         result = 3;
 441                         continue;
 442                 }
 443
 444                 // No errors encountered; don't retry
 445                 result = 0;
 446                 break;
 447         }
 448
 449         if (result != 0) {
 450                 Dbprintf("Cmd Error: too many retries; read failed");
 451                 return result;
 452         }
 453
 454         memcpy(blockData, receivedAnswer, 16);
 455         return 0;
 456 }
 457
 458 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 459 {
 460         // variables
 461         uint16_t len, i;
 462         uint32_t pos;
 463         uint8_t par[3] = {0};       // enough for 18 Bytes to send
 464         byte_t res;
 465
 466         uint8_t d_block[18], d_block_enc[18];
 467         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 468         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 469
 470         // command MIFARE_CLASSIC_WRITEBLOCK
 471         len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 472
 473         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 474                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 475                 return 1;
 476         }
 477
 478         memcpy(d_block, blockData, 16);
 479         AppendCrc14443a(d_block, 16);
 480
 481         // crypto
 482         for (pos = 0; pos < 18; pos++)
 483         {
 484                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 485                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 486         }
 487
 488         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 489
 490         // Receive the response
 491         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 492
 493         res = 0;
 494         for (i = 0; i < 4; i++)
 495                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 496
 497         if ((len != 1) || (res != 0x0A)) {
 498                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 499                 return 2;
 500         }
 501
 502         return 0;
 503 }
 504
 505 /* // command not needed, but left for future testing
 506 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 507 {
 508         uint16_t len;
 509         uint8_t par[3] = {0};  // enough for 18 parity bits
 510         uint8_t d_block[18] = {0x00};
 511         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 512         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 513
 514         len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 515
 516         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 517                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 518                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 519                 return 1;
 520         }
 521
 522         memcpy(d_block, blockData, 16);
 523         AppendCrc14443a(d_block, 16);
 524
 525         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 526
 527         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 528
 529         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 530                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 531                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 532                 return 2;
 533         }
 534         return 0;
 535 }
 536 */
 537
 538 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 539 {
 540         uint16_t len;
 541         uint8_t d_block[5] = {0x00};
 542         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 543         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 544
 545         // command MIFARE_CLASSIC_WRITEBLOCK
 546         d_block[0]= blockNo;
 547         memcpy(d_block+1,blockData,4);
 548         //AppendCrc14443a(d_block, 6);
 549
 550         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 551
 552         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 553                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 554                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 555                 return 1;
 556         }
 557         return 0;
 558 }
 559
 560 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 561 {
 562         uint16_t len;
 563         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 564         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 565
 566         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 567         if (len != 0) {
 568                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 569                         Dbprintf("halt error. response len: %x", len);
 570                 return 1;
 571         }
 572
 573         return 0;
 574 }
 575
 576 int mifare_ultra_halt()
 577 {
 578         uint16_t len;
 579         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 580         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 581
 582         len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 583         if (len != 0) {
 584                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 585                         Dbprintf("halt error. response len: %x", len);
 586                 return 1;
 587         }
 588         return 0;
 589 }
 590
 591
 592 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 593 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 594 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 595 {
 596         if (sectorNo < 32)
 597                 return 4;
 598         else
 599                 return 16;
 600 }
 601
 602 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 603 {
 604         if (sectorNo < 32)
 605                 return sectorNo * 4;
 606         else
 607                 return 32*4 + (sectorNo - 32) * 16;
 608
 609 }
 610
 611 uint8_t SectorTrailer(uint8_t blockNo)
 612 {
 613         if (blockNo < 32*4) {
 614                 return (blockNo | 0x03);
 615         } else {
 616                 return (blockNo | 0x0f);
 617         }
 618 }
 619
 620 bool IsSectorTrailer(uint8_t blockNo)
 621 {
 622         return (blockNo == SectorTrailer(blockNo));
 623 }
 624
 625 // work with emulator memory
 626 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 627         uint8_t* emCARD = BigBuf_get_EM_addr();
 628         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 629 }
 630
 631 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 632         uint8_t* emCARD = BigBuf_get_EM_addr();
 633         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 634 }
 635
 636 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 637         uint8_t* emCARD = BigBuf_get_EM_addr();
 638         memcpy(data, emCARD + bytePtr, byteCount);
 639 }
 640
 641 int emlCheckValBl(int blockNum) {
 642         uint8_t* emCARD = BigBuf_get_EM_addr();
 643         uint8_t* data = emCARD + blockNum * 16;
 644
 645         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 646                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 647                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 648                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 649                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 650                         (data[12] != (data[15] ^ 0xff))
 651                  )
 652                 return 1;
 653         return 0;
 654 }
 655
 656 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 657         uint8_t* emCARD = BigBuf_get_EM_addr();
 658         uint8_t* data = emCARD + blockNum * 16;
 659
 660         if (emlCheckValBl(blockNum)) {
 661                 return 1;
 662         }
 663
 664         memcpy(blReg, data, 4);
 665         *blBlock = data[12];
 666         return 0;
 667 }
 668
 669 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 670         uint8_t* emCARD = BigBuf_get_EM_addr();
 671         uint8_t* data = emCARD + blockNum * 16;
 672
 673         memcpy(data + 0, &blReg, 4);
 674         memcpy(data + 8, &blReg, 4);
 675         blReg = blReg ^ 0xffffffff;
 676         memcpy(data + 4, &blReg, 4);
 677
 678         data[12] = blBlock;
 679         data[13] = blBlock ^ 0xff;
 680         data[14] = blBlock;
 681         data[15] = blBlock ^ 0xff;
 682
 683         return 0;
 684 }
 685
 686 uint64_t emlGetKey(int sectorNum, int keyType) {
 687         uint8_t key[6];
 688         uint8_t* emCARD = BigBuf_get_EM_addr();
 689
 690         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 691         return bytes_to_num(key, 6);
 692 }
 693
 694 void emlClearMem(void) {
 695         int b;
 696
 697         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 698         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 699         uint8_t* emCARD = BigBuf_get_EM_addr();
 700
 701         memset(emCARD, 0, CARD_MEMORY_SIZE);
 702
 703         // fill sectors trailer data
 704         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 705                 emlSetMem((uint8_t *)trailer, b , 1);
 706         }
 707
 708         // uid
 709         emlSetMem((uint8_t *)uid, 0, 1);
 710         return;
 711 }
 712
 713
 714 // Mifare desfire commands
 715 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)
 716 {
 717         uint8_t dcmd[5] = {0x00};
 718         dcmd[0] = cmd;
 719         memcpy(dcmd+1,data,2);
 720         AppendCrc14443a(dcmd, 3);
 721
 722         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 723         int len = ReaderReceive(answer, answer_parity);
 724         if(!len) {
 725                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 726                         Dbprintf("Authentication failed. Card timeout.");
 727                 return 1;
 728         }
 729         return len;
 730 }
 731
 732 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)
 733 {
 734         uint8_t dcmd[20] = {0x00};
 735         dcmd[0] = cmd;
 736         memcpy(dcmd+1,data,17);
 737         AppendCrc14443a(dcmd, 18);
 738
 739         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 740         int len = ReaderReceive(answer, answer_parity);
 741         if(!len){
 742                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 743                         Dbprintf("Authentication failed. Card timeout.");
 744                 return 1;
 745         }
 746         return len;
 747 }
 748
 749 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 750
 751         int len;
 752         // load key, keynumber
 753         uint8_t data[2]={0x0a, 0x00};
 754         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 755         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 756
 757         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 758         if (len == 1) {
 759                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 760                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 761                 return 1;
 762         }
 763
 764         if (len == 12) {
 765                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 766                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 767                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 768                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 769                                 receivedAnswer[10],receivedAnswer[11]);
 770                         }
 771                         memcpy(blockData, receivedAnswer, 12);
 772                         return 0;
 773         }
 774         return 1;
 775 }
 776
 777 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 778
 779         int len;
 780         uint8_t data[17] = {0x00};
 781         data[0] = 0xAF;
 782         memcpy(data+1,key,16);
 783
 784         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 785         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 786
 787         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 788
 789         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 790                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 791                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 792                 return 1;
 793         }
 794
 795         if (len == 12){
 796                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 797                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 798                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 799                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 800                                 receivedAnswer[10],receivedAnswer[11]);
 801                         }
 802                 memcpy(blockData, receivedAnswer, 12);
 803                 return 0;
 804         }
 805         return 1;
 806 }
 807
 808 //-----------------------------------------------------------------------------
 809 // MIFARE check keys
 810 //
 811 //-----------------------------------------------------------------------------
 812 // one key check
 813 int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 814
 815         struct Crypto1State mpcs = {0, 0};
 816         struct Crypto1State *pcs;
 817         pcs = &mpcs;
 818
 819         // Iceman: use piwi's faster nonce collecting part in hardnested.
 820         if (*cascade_levels == 0) { // need a full select cycle to get the uid first
 821                 iso14a_card_select_t card_info;
 822                 if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
 823                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card");
 824                         return  1;
 825                 }
 826                 switch (card_info.uidlen) {
 827                         case 4 : *cascade_levels = 1; break;
 828                         case 7 : *cascade_levels = 2; break;
 829                         case 10: *cascade_levels = 3; break;
 830                         default: break;
 831                 }
 832         } else { // no need for anticollision. We can directly select the card
 833                 if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
 834                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
 835                         return  1;
 836                 }
 837         }
 838
 839         if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
 840 //      SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
 841                 return 2;
 842         } else {
 843 /*      // let it be here. it like halt command, but maybe it will work in some strange cases
 844                 uint8_t dummy_answer = 0;
 845                 ReaderTransmit(&dummy_answer, 1, NULL);
 846                 int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
 847                 // wait for the card to become ready again
 848                 while(GetCountSspClk() < timeout) {};
 849 */
 850                 // it needs after success authentication
 851                 mifare_classic_halt(pcs, *cuid);
 852         }
 853
 854         return 0;
 855 }
 856
 857 // multi key check
 858 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
 859         uint8_t uid[10];
 860         uint32_t cuid = 0;
 861         uint8_t cascade_levels = 0;
 862         uint64_t ui64Key = 0;
 863
 864         int retryCount = 0;
 865         for (uint8_t i = 0; i < keyCount; i++) {
 866
 867                 // Allow button press / usb cmd to interrupt device
 868                 if (BUTTON_PRESS() && !usb_poll_validate_length()) {
 869                         Dbprintf("ChkKeys: Cancel operation. Exit...");
 870                         return -2;
 871                 }
 872
 873                 ui64Key = bytes_to_num(keys + i * 6, 6);
 874                 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
 875
 876                 // can't select
 877                 if (res == 1) {
 878                         retryCount++;
 879                         if (retryCount >= 5) {
 880                                 Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
 881                                 return -1;
 882                         }
 883                         --i; // try the same key once again
 884
 885                         SpinDelay(20);
 886 //          Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
 887                         continue;
 888                 }
 889
 890                 // can't authenticate
 891                 if (res == 2) {
 892                         retryCount = 0;
 893                         continue; // can't auth. wrong key.
 894                 }
 895
 896                 return i + 1;
 897         }
 898
 899         return 0;
 900 }
 901
 902 // multisector multikey check
 903 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
 904         int res = 0;
 905
 906 //  int clk = GetCountSspClk();
 907
 908         for(int sc = 0; sc < SectorCount; sc++){
 909                 WDT_HIT();
 910
 911                 int keyAB = keyType;
 912                 do {
 913                         res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
 914                         if (res < 0){
 915                                 return res;
 916                         }
 917                         if (res > 0){
 918                                 (*keyIndex)[keyAB & 0x01][sc] = res;
 919                         }
 920                 } while(--keyAB > 0);
 921         }
 922
 923 //  Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
 924
 925         return 0;
 926 }
 927
 928