git.zerfleddert.de Git - proxmark3-svn/blob - armsrc/mifareutil.c

   1 //-----------------------------------------------------------------------------
   2 // Merlok, May 2011, 2012
   3 // Many authors, whom made it possible
   4 //
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // Work with mifare cards.
  10 //-----------------------------------------------------------------------------
  11
  12 #include "mifareutil.h"
  13
  14 #include <string.h>
  15 #include <stdbool.h>
  16
  17 #include "proxmark3.h"
  18 #include "apps.h"
  19 #include "util.h"
  20 #include "parity.h"
  21 #include "iso14443crc.h"
  22 #include "iso14443a.h"
  23 #include "crapto1/crapto1.h"
  24 #include "mbedtls/des.h"
  25 #include "protocols.h"
  26
  27 int MF_DBGLEVEL = MF_DBG_INFO;
  28
  29 // crypto1 helpers
  30 void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){
  31         uint8_t bt = 0;
  32         int i;
  33
  34         if (len != 1) {
  35                 for (i = 0; i < len; i++)
  36                         data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];
  37         } else {
  38                 bt = 0;
  39                 for (i = 0; i < 4; i++)
  40                         bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i;
  41
  42                 data_out[0] = bt;
  43         }
  44         return;
  45 }
  46
  47 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
  48         mf_crypto1_decryptEx(pcs, data, len, data);
  49 }
  50
  51 void mf_crypto1_encryptEx(struct Crypto1State *pcs, uint8_t *data, uint8_t *in, uint16_t len, uint8_t *par) {
  52         uint8_t bt = 0;
  53         int i;
  54         par[0] = 0;
  55
  56         for (i = 0; i < len; i++) {
  57                 bt = data[i];
  58                 data[i] = crypto1_byte(pcs, in==NULL?0x00:in[i], 0) ^ data[i];
  59                 if((i&0x0007) == 0)
  60                         par[i>>3] = 0;
  61                 par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007)));
  62         }
  63         return;
  64 }
  65
  66 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
  67         mf_crypto1_encryptEx(pcs, data, NULL, len, par);
  68 }
  69
  70 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
  71         uint8_t bt = 0;
  72         int i;
  73
  74         for (i = 0; i < 4; i++)
  75                 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
  76
  77         return bt;
  78 }
  79
  80 // send X byte basic commands
  81 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
  82 {
  83         uint8_t dcmd[data_size+3];
  84         dcmd[0] = cmd;
  85         memcpy(dcmd+1,data,data_size);
  86         AppendCrc14443a(dcmd, data_size+1);
  87         ReaderTransmit(dcmd, sizeof(dcmd), timing);
  88         int len = ReaderReceive(answer, answer_parity);
  89         if(!len) {
  90                 if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("%02X Cmd failed. Card timeout.", cmd);
  91                         len = ReaderReceive(answer,answer_parity);
  92                 //return 0;
  93         }
  94         return len;
  95 }
  96
  97 // send 2 byte commands
  98 int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
  99 {
 100         uint8_t dcmd[4], ecmd[4];
 101         uint16_t pos, res;
 102         uint8_t par[1];         // 1 Byte parity is enough here
 103         dcmd[0] = cmd;
 104         dcmd[1] = data;
 105         AppendCrc14443a(dcmd, 2);
 106
 107         memcpy(ecmd, dcmd, sizeof(dcmd));
 108
 109         if (crypted) {
 110                 par[0] = 0;
 111                 for (pos = 0; pos < 4; pos++)
 112                 {
 113                         ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
 114                         par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
 115                 }
 116                 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
 117         } else {
 118                 ReaderTransmit(dcmd, sizeof(dcmd), timing);
 119         }
 120
 121         int len = ReaderReceive(answer, par);
 122
 123         if (answer_parity) *answer_parity = par[0];
 124
 125         if (crypted == CRYPT_ALL) {
 126                 if (len == 1) {
 127                         res = 0;
 128                         for (pos = 0; pos < 4; pos++)
 129                                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
 130
 131                         answer[0] = res;
 132
 133                 } else {
 134                         for (pos = 0; pos < len; pos++)
 135                         {
 136                                 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
 137                         }
 138                 }
 139         }
 140
 141         return len;
 142 }
 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, uint32_t *auth_timeout) {
 147
 148         return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL, auth_timeout);
 149 }
 150
 151
 152 int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *ntptr, uint32_t *timing, uint32_t *auth_timeout) {
 153
 154         int len;
 155         uint32_t pos;
 156         uint8_t par[1] = {0x00};
 157         byte_t nr[4];
 158         uint32_t nt, ntpp; // Supplied tag nonce
 159
 160         uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
 161         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 162         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 163
 164         // Transmit MIFARE_CLASSIC_AUTH
 165         len = mifare_sendcmd_short(pcs, isNested, keyType & 0x01 ? MIFARE_AUTH_KEYB : MIFARE_AUTH_KEYA, blockNo, receivedAnswer, receivedAnswerPar, timing);
 166         if (MF_DBGLEVEL >= 4)   Dbprintf("rand tag nonce len: %x", len);
 167         if (len != 4) return 1;
 168
 169         // "random" reader nonce:
 170         nr[0] = 0x55;
 171         nr[1] = 0x41;
 172         nr[2] = 0x49;
 173         nr[3] = 0x92;
 174
 175         // Save the tag nonce (nt)
 176         nt = bytes_to_num(receivedAnswer, 4);
 177
 178         //  ----------------------------- crypto1 create
 179         if (isNested)
 180                 crypto1_destroy(pcs);
 181
 182         // Init cipher with key
 183         crypto1_create(pcs, ui64Key);
 184
 185         if (isNested == AUTH_NESTED) {
 186                 // decrypt nt with help of new key
 187                 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
 188         } else {
 189                 // Load (plain) uid^nt into the cipher
 190                 crypto1_word(pcs, nt ^ uid, 0);
 191         }
 192
 193         // some statistic
 194         if (!ntptr && (MF_DBGLEVEL >= 3))
 195                 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
 196
 197         // save Nt
 198         if (ntptr)
 199                 *ntptr = nt;
 200
 201         // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
 202         par[0] = 0;
 203         for (pos = 0; pos < 4; pos++) {
 204                 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
 205                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
 206         }
 207
 208         // Skip 32 bits in pseudo random generator
 209         nt = prng_successor(nt,32);
 210
 211         //  ar+parity
 212         for (pos = 4; pos < 8; pos++) {
 213                 nt = prng_successor(nt,8);
 214                 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 215                 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos));
 216         }
 217
 218         // Transmit reader nonce and reader answer
 219         ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
 220
 221         // Receive 4 byte tag answer
 222         uint32_t save_timeout = iso14a_get_timeout(); // save standard timeout
 223         if (auth_timeout && *auth_timeout) {
 224                 iso14a_set_timeout(*auth_timeout);        // set timeout for authentication response
 225         }
 226         uint32_t auth_timeout_start = GetCountSspClk();
 227         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 228         iso14a_set_timeout(save_timeout);             // restore standard timeout
 229         if (!len) {
 230                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
 231                 return 2;
 232         }
 233         if (auth_timeout && !*auth_timeout) {         // measure time for future authentication response timeout
 234                 *auth_timeout = (GetCountSspClk() - auth_timeout_start - (len * 9 + 2) * 8) / 8 + 1;
 235         }
 236
 237         ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0, 0);
 238
 239         if (ntpp != bytes_to_num(receivedAnswer, 4)) {
 240                 if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Error card response.");
 241                 return 3;
 242         }
 243
 244         return 0;
 245 }
 246
 247
 248 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) {
 249         // variables
 250         int len;
 251         uint8_t bt[2];
 252
 253         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 254         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 255
 256         // command MIFARE_CLASSIC_READBLOCK
 257         len = mifare_sendcmd_short(pcs, 1, MIFARE_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 258         if (len == 1) {
 259                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 260                 return 1;
 261         }
 262         if (len != 18) {
 263                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: card timeout. len: %x", len);
 264                 return 2;
 265         }
 266
 267         memcpy(bt, receivedAnswer + 16, 2);
 268         AppendCrc14443a(receivedAnswer, 16);
 269         if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 270                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd CRC response error.");
 271                 return 3;
 272         }
 273
 274         memcpy(blockData, receivedAnswer, 16);
 275         return 0;
 276 }
 277
 278 // mifare ultralight commands
 279 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 280
 281         uint16_t len;
 282         uint8_t resp[4];
 283         uint8_t respPar[1];
 284         uint8_t key[4] = {0x00};
 285         memcpy(key, keybytes, 4);
 286
 287         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 288                 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
 289         len = mifare_sendcmd(MIFARE_ULEV1_AUTH, key, sizeof(key), resp, respPar, NULL);
 290         //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 291         if (len != 4) {
 292                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
 293                 return 0;
 294         }
 295
 296         if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
 297                 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
 298
 299         memcpy(pack, resp, 4);
 300         return 1;
 301 }
 302
 303 int mifare_ultra_auth(uint8_t *keybytes){
 304
 305         /// 3des2k
 306
 307         mbedtls_des3_context ctx = { {0} };
 308         uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
 309         uint8_t random_b[8] = {0x00};
 310         uint8_t enc_random_b[8] = {0x00};
 311         uint8_t rnd_ab[16] = {0x00};
 312         uint8_t IV[8] = {0x00};
 313         uint8_t key[16] = {0x00};
 314         memcpy(key, keybytes, 16);
 315
 316         uint16_t len;
 317         uint8_t resp[19] = {0x00};
 318         uint8_t respPar[3] = {0,0,0};
 319
 320         // REQUEST AUTHENTICATION
 321         len = mifare_sendcmd_short(NULL, 1, MIFARE_ULC_AUTH_1, 0x00, resp, respPar ,NULL);
 322         if (len != 11) {
 323                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 324                 return 0;
 325         }
 326
 327         // tag nonce.
 328         memcpy(enc_random_b,resp+1,8);
 329
 330         // decrypt nonce.
 331         // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
 332         mbedtls_des3_set2key_dec(&ctx, key);
 333         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 334                 , MBEDTLS_DES_DECRYPT       // int mode
 335                 , sizeof(random_b)  // length
 336                 , IV                // iv[8]
 337                 , enc_random_b      // input
 338                 , random_b          // output
 339                 );
 340
 341         rol(random_b,8);
 342         memcpy(rnd_ab  ,random_a,8);
 343         memcpy(rnd_ab+8,random_b,8);
 344
 345         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 346                 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
 347                         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]);
 348
 349                 Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
 350                         random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 351
 352                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 353                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 354
 355                 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
 356                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
 357         }
 358
 359         // encrypt    out, in, length, key, iv
 360         //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
 361         mbedtls_des3_set2key_enc(&ctx, key);
 362         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 363                 , MBEDTLS_DES_ENCRYPT       // int mode
 364                 , sizeof(rnd_ab)    // length
 365                 , enc_random_b      // iv[8]
 366                 , rnd_ab            // input
 367                 , rnd_ab            // output
 368                 );
 369
 370         //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
 371         len = mifare_sendcmd(MIFARE_ULC_AUTH_2, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 372         if (len != 11) {
 373                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
 374                 return 0;
 375         }
 376
 377         uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
 378         uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
 379         memcpy(enc_resp, resp+1, 8);
 380
 381         // decrypt    out, in, length, key, iv
 382         // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
 383         mbedtls_des3_set2key_dec(&ctx, key);
 384         mbedtls_des3_crypt_cbc(&ctx     // des3_context
 385                 , MBEDTLS_DES_DECRYPT       // int mode
 386                 , 8                 // length
 387                 , enc_random_b      // iv[8]
 388                 , enc_resp          // input
 389                 , resp_random_a     // output
 390                 );
 391         if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
 392                 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
 393                 return 0;
 394         }
 395
 396         if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 397                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 398                                 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
 399                                 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
 400
 401                 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
 402                                 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
 403                                 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
 404
 405                 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
 406                                 random_a[0],random_a[1],random_a[2],random_a[3],
 407                                 random_a[4],random_a[5],random_a[6],random_a[7]);
 408
 409                 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
 410                                 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
 411                                 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 412         }
 413         return 1;
 414 }
 415
 416
 417 #define MFU_MAX_RETRIES 5
 418 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 419 {
 420         uint16_t len;
 421         uint8_t bt[2];
 422         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 423         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 424         uint8_t retries;
 425         int result = 0;
 426
 427         for (retries = 0; retries < MFU_MAX_RETRIES; retries++) {
 428                 len = mifare_sendcmd_short(NULL, 1, MIFARE_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 429                 if (len == 1) {
 430                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 431                         result = 1;
 432                         continue;
 433                 }
 434                 if (len != 18) {
 435                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
 436                         result = 2;
 437                         continue;
 438                 }
 439
 440                 memcpy(bt, receivedAnswer + 16, 2);
 441                 AppendCrc14443a(receivedAnswer, 16);
 442                 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
 443                         if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
 444                         result = 3;
 445                         continue;
 446                 }
 447
 448                 // No errors encountered; don't retry
 449                 result = 0;
 450                 break;
 451         }
 452
 453         if (result != 0) {
 454                 Dbprintf("Cmd Error: too many retries; read failed");
 455                 return result;
 456         }
 457
 458         memcpy(blockData, receivedAnswer, 16);
 459         return 0;
 460 }
 461
 462 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
 463 {
 464         // variables
 465         uint16_t len, i;
 466         uint32_t pos;
 467         uint8_t par[3] = {0};       // enough for 18 Bytes to send
 468         byte_t res;
 469
 470         uint8_t d_block[18], d_block_enc[18];
 471         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 472         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 473
 474         // command MIFARE_CLASSIC_WRITEBLOCK
 475         len = mifare_sendcmd_short(pcs, 1, MIFARE_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 476
 477         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 478                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 479                 return 1;
 480         }
 481
 482         memcpy(d_block, blockData, 16);
 483         AppendCrc14443a(d_block, 16);
 484
 485         // crypto
 486         for (pos = 0; pos < 18; pos++)
 487         {
 488                 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 489                 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
 490         }
 491
 492         ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
 493
 494         // Receive the response
 495         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 496
 497         res = 0;
 498         for (i = 0; i < 4; i++)
 499                 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 500
 501         if ((len != 1) || (res != 0x0A)) {
 502                 if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd send data2 Error: %02x", res);
 503                 return 2;
 504         }
 505
 506         return 0;
 507 }
 508
 509 /* // command not needed, but left for future testing
 510 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
 511 {
 512         uint16_t len;
 513         uint8_t par[3] = {0};  // enough for 18 parity bits
 514         uint8_t d_block[18] = {0x00};
 515         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 516         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 517
 518         len = mifare_sendcmd_short(NULL, true, MIFARE_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 519
 520         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 521                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 522                         Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
 523                 return 1;
 524         }
 525
 526         memcpy(d_block, blockData, 16);
 527         AppendCrc14443a(d_block, 16);
 528
 529         ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
 530
 531         len = ReaderReceive(receivedAnswer, receivedAnswerPar);
 532
 533         if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
 534                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 535                         Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
 536                 return 2;
 537         }
 538         return 0;
 539 }
 540 */
 541
 542 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 543 {
 544         uint16_t len;
 545         uint8_t d_block[5] = {0x00};
 546         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 547         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 548
 549         // command MIFARE_CLASSIC_WRITEBLOCK
 550         d_block[0]= blockNo;
 551         memcpy(d_block+1,blockData,4);
 552         //AppendCrc14443a(d_block, 6);
 553
 554         len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 555
 556         if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 557                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 558                         Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
 559                 return 1;
 560         }
 561         return 0;
 562 }
 563
 564 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
 565 {
 566         uint16_t len;
 567         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 568         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 569
 570         len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, ISO14443A_CMD_HALT, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 571         if (len != 0) {
 572                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 573                         Dbprintf("halt error. response len: %x", len);
 574                 return 1;
 575         }
 576
 577         return 0;
 578 }
 579
 580 int mifare_ultra_halt()
 581 {
 582         uint16_t len;
 583         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 584         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 585
 586         len = mifare_sendcmd_short(NULL, true, ISO14443A_CMD_HALT, 0x00, receivedAnswer, receivedAnswerPar, NULL);
 587         if (len != 0) {
 588                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 589                         Dbprintf("halt error. response len: %x", len);
 590                 return 1;
 591         }
 592         return 0;
 593 }
 594
 595
 596 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
 597 // plus evtl. 8 sectors with 16 blocks each (4k cards)
 598 uint8_t NumBlocksPerSector(uint8_t sectorNo)
 599 {
 600         if (sectorNo < 32)
 601                 return 4;
 602         else
 603                 return 16;
 604 }
 605
 606 uint8_t FirstBlockOfSector(uint8_t sectorNo)
 607 {
 608         if (sectorNo < 32)
 609                 return sectorNo * 4;
 610         else
 611                 return 32*4 + (sectorNo - 32) * 16;
 612
 613 }
 614
 615 uint8_t SectorTrailer(uint8_t blockNo)
 616 {
 617         if (blockNo < 32*4) {
 618                 return (blockNo | 0x03);
 619         } else {
 620                 return (blockNo | 0x0f);
 621         }
 622 }
 623
 624 bool IsSectorTrailer(uint8_t blockNo)
 625 {
 626         return (blockNo == SectorTrailer(blockNo));
 627 }
 628
 629 // work with emulator memory
 630 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 631         uint8_t* emCARD = BigBuf_get_EM_addr();
 632         memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
 633 }
 634
 635 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 636         uint8_t* emCARD = BigBuf_get_EM_addr();
 637         memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
 638 }
 639
 640 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
 641         uint8_t* emCARD = BigBuf_get_EM_addr();
 642         memcpy(data, emCARD + bytePtr, byteCount);
 643 }
 644
 645 int emlCheckValBl(int blockNum) {
 646         uint8_t* emCARD = BigBuf_get_EM_addr();
 647         uint8_t* data = emCARD + blockNum * 16;
 648
 649         if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
 650                         (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
 651                         (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
 652                         (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
 653                         (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
 654                         (data[12] != (data[15] ^ 0xff))
 655                  )
 656                 return 1;
 657         return 0;
 658 }
 659
 660 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
 661         uint8_t* emCARD = BigBuf_get_EM_addr();
 662         uint8_t* data = emCARD + blockNum * 16;
 663
 664         if (emlCheckValBl(blockNum)) {
 665                 return 1;
 666         }
 667
 668         memcpy(blReg, data, 4);
 669         *blBlock = data[12];
 670         return 0;
 671 }
 672
 673 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 674         uint8_t* emCARD = BigBuf_get_EM_addr();
 675         uint8_t* data = emCARD + blockNum * 16;
 676
 677         memcpy(data + 0, &blReg, 4);
 678         memcpy(data + 8, &blReg, 4);
 679         blReg = blReg ^ 0xffffffff;
 680         memcpy(data + 4, &blReg, 4);
 681
 682         data[12] = blBlock;
 683         data[13] = blBlock ^ 0xff;
 684         data[14] = blBlock;
 685         data[15] = blBlock ^ 0xff;
 686
 687         return 0;
 688 }
 689
 690 uint64_t emlGetKey(int sectorNum, int keyType) {
 691         uint8_t key[6];
 692         uint8_t* emCARD = BigBuf_get_EM_addr();
 693
 694         memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 695         return bytes_to_num(key, 6);
 696 }
 697
 698 void emlClearMem(void) {
 699         int b;
 700
 701         const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 702         const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 703         uint8_t* emCARD = BigBuf_get_EM_addr();
 704
 705         memset(emCARD, 0, CARD_MEMORY_SIZE);
 706
 707         // fill sectors trailer data
 708         for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
 709                 emlSetMem((uint8_t *)trailer, b , 1);
 710         }
 711
 712         // uid
 713         emlSetMem((uint8_t *)uid, 0, 1);
 714         return;
 715 }
 716
 717
 718 // Mifare desfire commands
 719 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)
 720 {
 721         uint8_t dcmd[5] = {0x00};
 722         dcmd[0] = cmd;
 723         memcpy(dcmd+1,data,2);
 724         AppendCrc14443a(dcmd, 3);
 725
 726         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 727         int len = ReaderReceive(answer, answer_parity);
 728         if(!len) {
 729                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 730                         Dbprintf("Authentication failed. Card timeout.");
 731                 return 1;
 732         }
 733         return len;
 734 }
 735
 736 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)
 737 {
 738         uint8_t dcmd[20] = {0x00};
 739         dcmd[0] = cmd;
 740         memcpy(dcmd+1,data,17);
 741         AppendCrc14443a(dcmd, 18);
 742
 743         ReaderTransmit(dcmd, sizeof(dcmd), NULL);
 744         int len = ReaderReceive(answer, answer_parity);
 745         if(!len){
 746                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 747                         Dbprintf("Authentication failed. Card timeout.");
 748                 return 1;
 749         }
 750         return len;
 751 }
 752
 753 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 754
 755         int len;
 756         // load key, keynumber
 757         uint8_t data[2]={0x0a, 0x00};
 758         uint8_t receivedAnswer[MAX_FRAME_SIZE];
 759         uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 760
 761         len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 762         if (len == 1) {
 763                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 764                         Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
 765                 return 1;
 766         }
 767
 768         if (len == 12) {
 769                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 770                         Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 771                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 772                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 773                                 receivedAnswer[10],receivedAnswer[11]);
 774                         }
 775                         memcpy(blockData, receivedAnswer, 12);
 776                         return 0;
 777         }
 778         return 1;
 779 }
 780
 781 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 782
 783         int len;
 784         uint8_t data[17] = {0x00};
 785         data[0] = 0xAF;
 786         memcpy(data+1,key,16);
 787
 788         uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 789         uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 790
 791         len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
 792
 793         if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
 794                 if (MF_DBGLEVEL >= MF_DBG_ERROR)
 795                         Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
 796                 return 1;
 797         }
 798
 799         if (len == 12){
 800                 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
 801                         Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 802                                 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
 803                                 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
 804                                 receivedAnswer[10],receivedAnswer[11]);
 805                         }
 806                 memcpy(blockData, receivedAnswer, 12);
 807                 return 0;
 808         }
 809         return 1;
 810 }
 811
 812 //-----------------------------------------------------------------------------
 813 // MIFARE check keys
 814 //
 815 //-----------------------------------------------------------------------------
 816 // one key check
 817 int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel) {
 818
 819         struct Crypto1State mpcs = {0, 0};
 820         struct Crypto1State *pcs;
 821         pcs = &mpcs;
 822
 823         // Iceman: use piwi's faster nonce collecting part in hardnested.
 824         if (*cascade_levels == 0) { // need a full select cycle to get the uid first
 825                 iso14a_card_select_t card_info;
 826                 if (!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
 827                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card");
 828                         return  1;
 829                 }
 830                 switch (card_info.uidlen) {
 831                         case 4 : *cascade_levels = 1; break;
 832                         case 7 : *cascade_levels = 2; break;
 833                         case 10: *cascade_levels = 3; break;
 834                         default: break;
 835                 }
 836         } else { // no need for anticollision. We can directly select the card
 837                 if (!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
 838                         if (debugLevel >= 1)    Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
 839                         return  1;
 840                 }
 841         }
 842
 843         if (mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST, auth_timeout)) { // authentication failed
 844                 return 2;
 845         } else {
 846                 mifare_classic_halt(pcs, *cuid);
 847         }
 848
 849         return 0;
 850 }
 851
 852
 853 // multi key check
 854 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel) {
 855
 856         uint8_t uid[10];
 857         uint32_t cuid = 0;
 858         uint8_t cascade_levels = 0;
 859         uint64_t ui64Key = 0;
 860
 861         int retryCount = 0;
 862         for (uint8_t i = 0; i < keyCount; i++) {
 863
 864                 ui64Key = bytes_to_num(keys + i * 6, 6);
 865                 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, auth_timeout, debugLevel);
 866
 867                 // can't select
 868                 if (res == 1) {
 869                         retryCount++;
 870                         if (retryCount >= 5) {
 871                                 Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
 872                                 return -1;
 873                         }
 874                         --i; // try the same key once again
 875
 876                         SpinDelay(20);
 877 //          Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
 878                         continue;
 879                 }
 880
 881                 // can't authenticate
 882                 if (res == 2) {
 883                         retryCount = 0;
 884                         continue; // can't auth. wrong key.
 885                 }
 886
 887                 // successful authentication
 888                 return i + 1;
 889         }
 890
 891         if (BUTTON_PRESS()) {
 892                 return -2;
 893         }
 894
 895         return 0;
 896 }
 897
 898
 899 // multisector multikey check
 900 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint32_t *auth_timeout, uint8_t debugLevel, TKeyIndex *keyIndex) {
 901         int res = 0;
 902
 903 //  int clk = GetCountSspClk();
 904
 905         for(int sc = 0; sc < SectorCount; sc++){
 906                 WDT_HIT();
 907
 908                 int keyAB = keyType;
 909                 do {
 910                         res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, auth_timeout, debugLevel);
 911                         if (res < 0) {
 912                                 return res;
 913                         }
 914                         if (res > 0) {
 915                                 (*keyIndex)[keyAB & 0x01][sc] = res;
 916                         }
 917                 } while(--keyAB > 0);
 918         }
 919
 920 //  Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
 921
 922         return 1;
 923 }
 924
 925