armsrc/mifareutil.c

   1 //-----------------------------------------------------------------------------
   2 // Merlok, May 2011, 2012
   3 // Many authors, whom made it possible
   4 //
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // Work with mifare cards.
  10 //-----------------------------------------------------------------------------
  11
  12 #include "mifareutil.h"
  13
  14 #include <string.h>
  15 #include <stdbool.h>
  16
  17 #include "proxmark3.h"
  18 #include "apps.h"
  19 #include "util.h"
  20 #include "parity.h"
  21 #include "iso14443crc.h"
  22 #include "iso14443a.h"
  23 #include "crapto1/crapto1.h"
  24 #include "mbedtls/des.h"
  25 #include "protocols.h"
  26
  27 int MF_DBGLEVEL = MF_DBG_INFO;
  28
  29 // crypto1 helpers
  30 void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){
  31         uint8_t bt = 0;
  32         int i;
  33
  34         if (len != 1) {
  35                 for (i = 0; i < len; i++)
  36                         data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];
  37         } else {
  38                 bt = 0;
  39                 for (i = 0; i < 4; i++)
  40                         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i;
  41
  42                 data_out[0] = bt;
  43         }
  44         return;
  45 }
  46
  47 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  48         mf_crypto1_decryptEx(pcs, data, len, data);
  49 }
  50
  51 void mf_crypto1_encryptEx(struct Crypto1State *pcs, uint8_t *data, uint8_t *in, uint16_t len, uint8_t *par) {
  52         uint8_t bt = 0;
  53         int i;
  54         par[0] = 0;
  55
  56         for (i = 0; i < len; i++) {
  57                 bt = data[i];
  58                 data[i] = crypto1_byte(pcs, in==NULL?0x00:in[i], 0) ^ data[i];
  59                 if((i&0x0007) == 0)
  60                         par[i>>3] = 0;
  61                 par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007)));
  62         }
  63         return;
  64 }
  65
  66 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  67         mf_crypto1_encryptEx(pcs, data, NULL, len, par);
  68 }
  69
  70 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  71         uint8_t bt = 0;
  72         int i;
  73
  74         for (i = 0; i < 4; i++)
  75                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  76
  77         return bt;
  78 }
  79
  80 // send X byte basic commands
  81 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing) {
  82         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         uint8_t dcmd[4], ecmd[4];
  99         uint16_t pos, res;
 100         uint8_t par[1];         // 1 Byte parity is enough here
 101         dcmd[0] = cmd;
 102         dcmd[1] = data;
 103         AppendCrc14443a(dcmd, 2);
 104
 105         memcpy(ecmd, dcmd, sizeof(dcmd));
 106
 107         if (crypted) {
 108                 par[0] = 0;
 109                 for (pos = 0; pos < 4; pos++)
 110                 {
 111                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 112                         par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
 113                 }
 114                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 115         } else {
 116                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 117         }
 118
 119         int len = ReaderReceive(answer, par);
 120
 121         if (answer_parity) *answer_parity = par[0];
 122
 123         if (crypted == CRYPT_ALL) {
 124                 if (len == 1) {
 125                         res = 0;
 126                         for (pos = 0; pos < 4; pos++)
 127                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 128
 129                         answer[0] = res;
 130
 131                 } else {
 132                         for (pos = 0; pos < len; pos++)
 133                         {
 134                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 135                         }
 136                 }
 137         }
 138
 139         return len;
 140 }
 141
 142
 143 // mifare classic commands
 144 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *auth_timeout) {
 145
 146         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL, auth_timeout);
 147 }
 148
 149
 150 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, uint32_t *auth_timeout) {
 151
 152         int len;
 153         uint32_t pos;
 154         uint8_t par[1] = {0x00};
 155         byte_t nr[4];
 156         uint32_t nt, ntpp; // Supplied tag nonce
 157
 158         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 159         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 160         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 161
 162         // Transmit MIFARE_CLASSIC_AUTH
 163         len = mifare_sendcmd_short(pcs, isNested, keyType & 0x01 ? MIFARE_AUTH_KEYB : MIFARE_AUTH_KEYA, blockNo, receivedAnswer, receivedAnswerPar, timing);
 164         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 165         if (len != 4) return 1;
 166
 167         // "random" reader nonce:
 168         nr[0] = 0x55;
 169         nr[1] = 0x41;
 170         nr[2] = 0x49;
 171         nr[3] = 0x92;
 172
 173         // Save the tag nonce (nt)
 174         nt = bytes_to_num(receivedAnswer, 4);
 175
 176         //  ----------------------------- crypto1 create
 177         if (isNested)
 178                 crypto1_destroy(pcs);
 179
 180         // Init cipher with key
 181         crypto1_create(pcs, ui64Key);
 182
 183         if (isNested == AUTH_NESTED) {
 184                 // decrypt nt with help of new key
 185                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 186         } else {
 187                 // Load (plain) uid^nt into the cipher
 188                 crypto1_word(pcs, nt ^ uid, 0);
 189         }
 190
 191         // some statistic
 192         if (!ntptr && (MF_DBGLEVEL >= 3))
 193                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 194
 195         // save Nt
 196         if (ntptr)
 197                 *ntptr = nt;
 198
 199         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 200         par[0] = 0;
 201         for (pos = 0; pos < 4; pos++) {
 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                 nt = prng_successor(nt,8);
 212                 mf_nr_ar[pos] = crypto1_byte(pcs, 0x00, 0) ^ (nt & 0xff);
 213                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos));
 214         }
 215
 216         // Transmit reader nonce and reader answer
 217         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 218
 219         // Receive 4 byte tag answer
 220         uint32_t save_timeout = iso14a_get_timeout(); // save standard timeout
 221         if (auth_timeout && *auth_timeout) {
 222                 iso14a_set_timeout(*auth_timeout);        // set timeout for authentication response
 223         }
 224         uint32_t auth_timeout_start = GetCountSspClk();
 225         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 226         iso14a_set_timeout(save_timeout);             // restore standard timeout
 227         if (!len) {
 228                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 229                 return 2;
 230         }
 231         if (auth_timeout && !*auth_timeout) {         // measure time for future authentication response timeout
 232                 *auth_timeout = (GetCountSspClk() - auth_timeout_start - (len * 9 + 2) * 8) / 8 + 1;
 233         }
 234
 235         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0, 0);
 236
 237         if (ntpp != bytes_to_num(receivedAnswer, 4)) {
 238                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 239                 return 3;
 240         }
 241
 242         return 0;
 243 }
 244
 245
 246 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) {
 247         // variables
 248         int len;
 249         uint8_t bt[2];
 250
 251         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 252         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 253
 254         // command MIFARE_CLASSIC_READBLOCK
 255         len = mifare_sendcmd_short(pcs, 1, MIFARE_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 256         if (len == 1) {
 257                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 258                 return 1;
 259         }
 260         if (len != 18) {
 261                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 262                 return 2;
 263         }
 264
 265         memcpy(bt, receivedAnswer + 16, 2);
 266         AppendCrc14443a(receivedAnswer, 16);
 267         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 268                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 269                 return 3;
 270         }
 271
 272         memcpy(blockData, receivedAnswer, 16);
 273         return 0;
 274 }
 275
 276 // mifare ultralight commands
 277 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 278
 279         uint16_t len;
 280         uint8_t resp[4];
 281         uint8_t respPar[1];
 282         uint8_t key[4] = {0x00};
 283         memcpy(key, keybytes, 4);
 284
 285         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 286                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 287         len = mifare_sendcmd(MIFARE_ULEV1_AUTH, key, sizeof(key), resp, respPar, NULL);
 288         //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 289         if (len != 4) {
 290                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 291                 return 0;
 292         }
 293
 294         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 295                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 296
 297         memcpy(pack, resp, 4);
 298         return 1;
 299 }
 300
 301 int mifare_ultra_auth(uint8_t *keybytes){
 302
 303         /// 3des2k
 304
 305         mbedtls_des3_context ctx = { {0} };
 306         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 307         uint8_t random_b[8] = {0x00};
 308         uint8_t enc_random_b[8] = {0x00};
 309         uint8_t rnd_ab[16] = {0x00};
 310         uint8_t IV[8] = {0x00};
 311         uint8_t key[16] = {0x00};
 312         memcpy(key, keybytes, 16);
 313
 314         uint16_t len;
 315         uint8_t resp[19] = {0x00};
 316         uint8_t respPar[3] = {0,0,0};
 317
 318         // REQUEST AUTHENTICATION
 319         len = mifare_sendcmd_short(NULL, 1, MIFARE_ULC_AUTH_1, 0x00, resp, respPar ,NULL);
 320         if (len != 11) {
 321                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 322                 return 0;
 323         }
 324
 325         // tag nonce.
 326         memcpy(enc_random_b,resp+1,8);
 327
 328         // decrypt nonce.
 329         // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
 330         mbedtls_des3_set2key_dec(&ctx, key);
 331         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 332                 , MBEDTLS_DES_DECRYPT       // int mode
 333                 , sizeof(random_b)  // length
 334                 , IV                // iv[8]
 335                 , enc_random_b      // input
 336                 , random_b          // output
 337                 );
 338
 339         rol(random_b,8);
 340         memcpy(rnd_ab  ,random_a,8);
 341         memcpy(rnd_ab+8,random_b,8);
 342
 343         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 344                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 345                         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]);
 346
 347                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 348                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 349
 350                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 351                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 352
 353                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 354                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 355         }
 356
 357         // encrypt    out, in, length, key, iv
 358         //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 359         mbedtls_des3_set2key_enc(&ctx, key);
 360         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 361                 , MBEDTLS_DES_ENCRYPT       // int mode
 362                 , sizeof(rnd_ab)    // length
 363                 , enc_random_b      // iv[8]
 364                 , rnd_ab            // input
 365                 , rnd_ab            // output
 366                 );
 367
 368         //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
 369         len = mifare_sendcmd(MIFARE_ULC_AUTH_2, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 370         if (len != 11) {
 371                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 372                 return 0;
 373         }
 374
 375         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 376         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 377         memcpy(enc_resp, resp+1, 8);
 378
 379         // decrypt    out, in, length, key, iv
 380         // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 381         mbedtls_des3_set2key_dec(&ctx, key);
 382         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 383                 , MBEDTLS_DES_DECRYPT       // int mode
 384                 , 8                 // length
 385                 , enc_random_b      // iv[8]
 386                 , enc_resp          // input
 387                 , resp_random_a     // output
 388                 );
 389         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 390                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 391                 return 0;
 392         }
 393
 394         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 395                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 396                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 397                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 398
 399                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 400                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 401                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 402
 403                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 404                                 random_a[0],random_a[1],random_a[2],random_a[3],
 405                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 406
 407                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 408                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 409                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 410         }
 411         return 1;
 412 }
 413
 414
 415 #define MFU_MAX_RETRIES 5
 416 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 417 {
 418         uint16_t len;
 419         uint8_t bt[2];
 420         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 421         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 422         uint8_t retries;
 423         int result = 0;
 424
 425         for (retries = 0; retries < MFU_MAX_RETRIES; retries++) {
 426                 len = mifare_sendcmd_short(NULL, 1, MIFARE_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 427                 if (len == 1) {
 428                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 429                         result = 1;
 430                         continue;
 431                 }
 432                 if (len != 18) {
 433                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 434                         result = 2;
 435                         continue;
 436                 }
 437
 438                 memcpy(bt, receivedAnswer + 16, 2);
 439                 AppendCrc14443a(receivedAnswer, 16);
 440                 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 441                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 442                         result = 3;
 443                         continue;
 444                 }
 445
 446                 // No errors encountered; don't retry
 447                 result = 0;
 448                 break;
 449         }
 450
 451         if (result != 0) {
 452                 Dbprintf("Cmd Error: too many retries; read failed");
 453                 return result;
 454         }
 455
 456         memcpy(blockData, receivedAnswer, 16);
 457         return 0;
 458 }
 459
 460 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 461 {
 462         // variables
 463         uint16_t len, i;
 464         uint32_t pos;
 465         uint8_t par[3] = {0};       // enough for 18 Bytes to send
 466         byte_t res;
 467
 468         uint8_t d_block[18], d_block_enc[18];
 469         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 470         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 471
 472         // command MIFARE_CLASSIC_WRITEBLOCK
 473         len = mifare_sendcmd_short(pcs, 1, MIFARE_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 474
 475         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 476                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 477                 return 1;
 478         }
 479
 480         memcpy(d_block, blockData, 16);
 481         AppendCrc14443a(d_block, 16);
 482
 483         // crypto
 484         for (pos = 0; pos < 18; pos++)
 485         {
 486                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 487                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 488         }
 489
 490         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 491
 492         // Receive the response
 493         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 494
 495         res = 0;
 496         for (i = 0; i < 4; i++)
 497                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 498
 499         if ((len != 1) || (res != 0x0A)) {
 500                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 501                 return 2;
 502         }
 503
 504         return 0;
 505 }
 506
 507 /* // command not needed, but left for future testing
 508 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 509 {
 510         uint16_t len;
 511         uint8_t par[3] = {0};  // enough for 18 parity bits
 512         uint8_t d_block[18] = {0x00};
 513         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 514         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 515
 516         len = mifare_sendcmd_short(NULL, true, MIFARE_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 517
 518         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 519                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 520                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 521                 return 1;
 522         }
 523
 524         memcpy(d_block, blockData, 16);
 525         AppendCrc14443a(d_block, 16);
 526
 527         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 528
 529         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 530
 531         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 532                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 533                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 534                 return 2;
 535         }
 536         return 0;
 537 }
 538 */
 539
 540 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 541 {
 542         uint16_t len;
 543         uint8_t d_block[5] = {0x00};
 544         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 545         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 546
 547         // command MIFARE_CLASSIC_WRITEBLOCK
 548         d_block[0]= blockNo;
 549         memcpy(d_block+1,blockData,4);
 550         //AppendCrc14443a(d_block, 6);
 551
 552         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 553
 554         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 555                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 556                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 557                 return 1;
 558         }
 559         return 0;
 560 }
 561
 562 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 563 {
 564         uint16_t len;
 565         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 566         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 567
 568         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, ISO14443A_CMD_HALT, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 569         if (len != 0) {
 570                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 571                         Dbprintf("halt error. response len: %x", len);
 572                 return 1;
 573         }
 574
 575         return 0;
 576 }
 577
 578 int mifare_ultra_halt()
 579 {
 580         uint16_t len;
 581         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 582         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 583
 584         len = mifare_sendcmd_short(NULL, true, ISO14443A_CMD_HALT, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 585         if (len != 0) {
 586                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 587                         Dbprintf("halt error. response len: %x", len);
 588                 return 1;
 589         }
 590         return 0;
 591 }
 592
 593
 594 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 595 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 596 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 597 {
 598         if (sectorNo < 32)
 599                 return 4;
 600         else
 601                 return 16;
 602 }
 603
 604 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 605 {
 606         if (sectorNo < 32)
 607                 return sectorNo * 4;
 608         else
 609                 return 32*4 + (sectorNo - 32) * 16;
 610
 611 }
 612
 613 uint8_t SectorTrailer(uint8_t blockNo)
 614 {
 615         if (blockNo < 32*4) {
 616                 return (blockNo | 0x03);
 617         } else {
 618                 return (blockNo | 0x0f);
 619         }
 620 }
 621
 622 bool IsSectorTrailer(uint8_t blockNo)
 623 {
 624         return (blockNo == SectorTrailer(blockNo));
 625 }
 626
 627 // work with emulator memory
 628 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 629         uint8_t* emCARD = BigBuf_get_EM_addr();
 630         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 631 }
 632
 633 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 634         uint8_t* emCARD = BigBuf_get_EM_addr();
 635         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 636 }
 637
 638 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 639         uint8_t* emCARD = BigBuf_get_EM_addr();
 640         memcpy(data, emCARD + bytePtr, byteCount);
 641 }
 642
 643 int emlCheckValBl(int blockNum) {
 644         uint8_t* emCARD = BigBuf_get_EM_addr();
 645         uint8_t* data = emCARD + blockNum * 16;
 646
 647         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 648                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 649                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 650                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 651                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 652                         (data[12] != (data[15] ^ 0xff))
 653                  )
 654                 return 1;
 655         return 0;
 656 }
 657
 658 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 659         uint8_t* emCARD = BigBuf_get_EM_addr();
 660         uint8_t* data = emCARD + blockNum * 16;
 661
 662         if (emlCheckValBl(blockNum)) {
 663                 return 1;
 664         }
 665
 666         memcpy(blReg, data, 4);
 667         *blBlock = data[12];
 668         return 0;
 669 }
 670
 671 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 672         uint8_t* emCARD = BigBuf_get_EM_addr();
 673         uint8_t* data = emCARD + blockNum * 16;
 674
 675         memcpy(data + 0, &blReg, 4);
 676         memcpy(data + 8, &blReg, 4);
 677         blReg = blReg ^ 0xffffffff;
 678         memcpy(data + 4, &blReg, 4);
 679
 680         data[12] = blBlock;
 681         data[13] = blBlock ^ 0xff;
 682         data[14] = blBlock;
 683         data[15] = blBlock ^ 0xff;
 684
 685         return 0;
 686 }
 687
 688 uint64_t emlGetKey(int sectorNum, int keyType) {
 689         uint8_t key[6];
 690         uint8_t* emCARD = BigBuf_get_EM_addr();
 691
 692         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 693         return bytes_to_num(key, 6);
 694 }
 695
 696 void emlClearMem(void) {
 697         int b;
 698
 699         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 700         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 701         uint8_t* emCARD = BigBuf_get_EM_addr();
 702
 703         memset(emCARD, 0, CARD_MEMORY_SIZE);
 704
 705         // fill sectors trailer data
 706         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 707                 emlSetMem((uint8_t *)trailer, b , 1);
 708         }
 709
 710         // uid
 711         emlSetMem((uint8_t *)uid, 0, 1);
 712         return;
 713 }
 714
 715
 716 // Mifare desfire commands
 717 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)
 718 {
 719         uint8_t dcmd[5] = {0x00};
 720         dcmd[0] = cmd;
 721         memcpy(dcmd+1,data,2);
 722         AppendCrc14443a(dcmd, 3);
 723
 724         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 725         int len = ReaderReceive(answer, answer_parity);
 726         if(!len) {
 727                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 728                         Dbprintf("Authentication failed. Card timeout.");
 729                 return 1;
 730         }
 731         return len;
 732 }
 733
 734 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)
 735 {
 736         uint8_t dcmd[20] = {0x00};
 737         dcmd[0] = cmd;
 738         memcpy(dcmd+1,data,17);
 739         AppendCrc14443a(dcmd, 18);
 740
 741         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 742         int len = ReaderReceive(answer, answer_parity);
 743         if(!len){
 744                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 745                         Dbprintf("Authentication failed. Card timeout.");
 746                 return 1;
 747         }
 748         return len;
 749 }
 750
 751 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 752
 753         int len;
 754         // load key, keynumber
 755         uint8_t data[2]={0x0a, 0x00};
 756         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 757         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 758
 759         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 760         if (len == 1) {
 761                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 762                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 763                 return 1;
 764         }
 765
 766         if (len == 12) {
 767                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 768                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 769                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 770                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 771                                 receivedAnswer[10],receivedAnswer[11]);
 772                         }
 773                         memcpy(blockData, receivedAnswer, 12);
 774                         return 0;
 775         }
 776         return 1;
 777 }
 778
 779 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 780
 781         int len;
 782         uint8_t data[17] = {0x00};
 783         data[0] = 0xAF;
 784         memcpy(data+1,key,16);
 785
 786         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 787         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 788
 789         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 790
 791         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 792                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 793                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 794                 return 1;
 795         }
 796
 797         if (len == 12){
 798                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 799                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 800                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 801                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 802                                 receivedAnswer[10],receivedAnswer[11]);
 803                         }
 804                 memcpy(blockData, receivedAnswer, 12);
 805                 return 0;
 806         }
 807         return 1;
 808 }
 809
 810 //-----------------------------------------------------------------------------
 811 // MIFARE check keys
 812 //
 813 //-----------------------------------------------------------------------------
 814 // one key check
 815 static int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint8_t *key, uint8_t blockNo, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel, bool fixed_nonce) {
 816
 817         struct Crypto1State mpcs = {0, 0};
 818         struct Crypto1State *pcs;
 819         pcs = &mpcs;
 820
 821         if (*cascade_levels == 0) { // need a full select cycle to get the uid first
 822                 iso14a_card_select_t card_info;
 823                 if (!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
 824                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card");
 825                         return  -1;
 826                 }
 827                 switch (card_info.uidlen) {
 828                         case 4 : *cascade_levels = 1; break;
 829                         case 7 : *cascade_levels = 2; break;
 830                         case 10: *cascade_levels = 3; break;
 831                         default: break;
 832                 }
 833         } else { // no need for anticollision. We can directly select the card
 834                 if (!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
 835                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
 836                         return  -1;
 837                 }
 838         }
 839
 840         if (!fixed_nonce) {
 841                 uint64_t ui64Key = bytes_to_num(key, 6);
 842                 if (mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST, auth_timeout)) { // authentication failed
 843                         return -2;
 844                 } else {
 845                         mifare_classic_halt(pcs, *cuid);
 846                 }
 847         } else {
 848                 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 849                 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 850                 // Transmit MIFARE_CLASSIC_AUTH
 851                 int len = mifare_sendcmd_short(pcs, false, keyType & 0x01 ? MIFARE_AUTH_KEYB : MIFARE_AUTH_KEYA, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 852                 if (len != 4) return -2;
 853                 // Transmit encrypted reader nonce and reader answer
 854                 uint8_t mf_nr_ar[8] = NESTED_FIXED_NR_ENC;
 855                 memcpy(mf_nr_ar + 4, key, 4);
 856                 ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), key + 4, NULL);
 857                 uint32_t save_timeout = iso14a_get_timeout(); // save standard timeout
 858                 iso14a_set_timeout(*auth_timeout);            // set timeout for authentication response
 859                 len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 860                 iso14a_set_timeout(save_timeout);             // restore standard timeout
 861                 if (!len) return -2;
 862         }
 863
 864         return 0; // success
 865 }
 866
 867 // multi key check
 868 static int MifareChkBlockKeysEx(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel, bool fixed_nonce) {
 869
 870         uint8_t uid[10];
 871         uint32_t cuid = 0;
 872         uint8_t cascade_levels = 0;
 873
 874         int retryCount = 0;
 875         for (uint8_t i = 0; i < keyCount; i++) {
 876                 uint8_t bytes_per_key = fixed_nonce ? 5 : 6;
 877                 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, keys + i*bytes_per_key, blockNo, keyType, auth_timeout, debugLevel, fixed_nonce);
 878                 if (res == -1) {                // couldn't select
 879                         retryCount++;
 880                         if (retryCount >= 5) {
 881                                 Dbprintf("ChkKeys: block=%d key=%d. Couldn't select. Exit...", blockNo, keyType);
 882                                 return -1;
 883                         } else {
 884                                 --i; // try the same key once again
 885                                 SpinDelay(20);
 886                                 // Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
 887                                 continue;
 888                         }
 889                 }
 890                 if (res == -2) {                // couldn't authenticate with this key
 891                         retryCount = 0;
 892                         continue;
 893                 }
 894
 895                 return i + 1;           // successful authentication
 896
 897         }
 898
 899         if (BUTTON_PRESS()) {
 900                 return -2;
 901         }
 902
 903         return 0;                   // couldn't authenticate with any key
 904 }
 905
 906
 907 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel) {
 908         return MifareChkBlockKeysEx(keys, keyCount, blockNo, keyType, auth_timeout, debugLevel, false);
 909 }
 910
 911
 912 // fixed nonce check
 913 int MifareChkBlockKeysFixedNonce(uint8_t *ar_par, uint8_t ar_par_cnt, uint8_t blockNo, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel) {
 914         return MifareChkBlockKeysEx(ar_par, ar_par_cnt, blockNo, keyType, auth_timeout, debugLevel, true);
 915 }
 916
 917
 918 // multisector multikey check
 919 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel, TKeyIndex *keyIndex) {
 920         int res = 0;
 921
 922 //  int clk = GetCountSspClk();
 923
 924         for(int sc = 0; sc < SectorCount; sc++){
 925                 WDT_HIT();
 926
 927                 int keyAB = keyType;
 928                 do {
 929                         res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, auth_timeout, debugLevel);
 930                         if (res < 0) {
 931                                 return res;
 932                         }
 933                         if (res > 0) {
 934                                 (*keyIndex)[keyAB & 0x01][sc] = res;
 935                         }
 936                 } while(--keyAB > 0);
 937         }
 938
 939 //  Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
 940
 941         return 1;
 942 }
 943
 944