cvs.zerfleddert.de Git - proxmark3-svn/blob - client/mifarehost.c

   1 // Merlok, 2011, 2012
   2 // people from mifare@nethemba.com, 2010
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // mifare commands
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <pthread.h>
  15 #include "mifarehost.h"
  16 #include "proxmark3.h"
  17
  18 #define llx PRIx64
  19
  20 // MIFARE
  21 int compar_int(const void * a, const void * b) {
  22         // didn't work: (the result is truncated to 32 bits)
  23         //return (*(uint64_t*)b - *(uint64_t*)a);
  24
  25         // better:
  26         if (*(uint64_t*)b == *(uint64_t*)a) return 0;
  27         else if (*(uint64_t*)b > *(uint64_t*)a) return 1;
  28         else return -1;
  29 }
  30
  31 // Compare 16 Bits out of cryptostate
  32 int Compare16Bits(const void * a, const void * b) {
  33         if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;
  34         else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;
  35         else return -1;
  36 }
  37
  38 typedef
  39         struct {
  40                 union {
  41                         struct Crypto1State *slhead;
  42                         uint64_t *keyhead;
  43                 } head;
  44                 union {
  45                         struct Crypto1State *sltail;
  46                         uint64_t *keytail;
  47                 } tail;
  48                 uint32_t len;
  49                 uint32_t uid;
  50                 uint32_t blockNo;
  51                 uint32_t keyType;
  52                 uint32_t nt;
  53                 uint32_t ks1;
  54         } StateList_t;
  55
  56
  57 // wrapper function for multi-threaded lfsr_recovery32
  58 void* nested_worker_thread(void *arg)
  59 {
  60         struct Crypto1State *p1;
  61         StateList_t *statelist = arg;
  62
  63         statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);
  64         for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);
  65         statelist->len = p1 - statelist->head.slhead;
  66         statelist->tail.sltail = --p1;
  67         qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);
  68
  69         return statelist->head.slhead;
  70 }
  71
  72 int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate)
  73 {
  74         uint16_t i, len;
  75         uint32_t uid;
  76         UsbCommand resp;
  77         StateList_t statelists[2];
  78         struct Crypto1State *p1, *p2, *p3, *p4;
  79
  80         // flush queue
  81         WaitForResponseTimeout(CMD_ACK,NULL,100);
  82
  83         UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};
  84         memcpy(c.d.asBytes, key, 6);
  85         SendCommand(&c);
  86
  87         if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
  88                 len = resp.arg[1];
  89                 if (len == 2) {
  90                         memcpy(&uid, resp.d.asBytes, 4);
  91                         PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);
  92
  93                         for (i = 0; i < 2; i++) {
  94                                 statelists[i].blockNo = resp.arg[2] & 0xff;
  95                                 statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;
  96                                 statelists[i].uid = uid;
  97
  98                                 memcpy(&statelists[i].nt,  (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);
  99                                 memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);
 100                         }
 101                 }
 102                 else {
 103                         PrintAndLog("Got 0 keys from proxmark.");
 104                         return 1;
 105                 }
 106         }
 107
 108         // calc keys
 109
 110         pthread_t thread_id[2];
 111
 112         // create and run worker threads
 113         for (i = 0; i < 2; i++) {
 114                 pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);
 115         }
 116
 117         // wait for threads to terminate:
 118         for (i = 0; i < 2; i++) {
 119                 pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);
 120         }
 121
 122
 123         // the first 16 Bits of the cryptostate already contain part of our key.
 124         // Create the intersection of the two lists based on these 16 Bits and
 125         // roll back the cryptostate
 126         p1 = p3 = statelists[0].head.slhead;
 127         p2 = p4 = statelists[1].head.slhead;
 128         while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {
 129                 if (Compare16Bits(p1, p2) == 0) {
 130                         struct Crypto1State savestate, *savep = &savestate;
 131                         savestate = *p1;
 132                         while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {
 133                                 *p3 = *p1;
 134                                 lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);
 135                                 p3++;
 136                                 p1++;
 137                         }
 138                         savestate = *p2;
 139                         while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {
 140                                 *p4 = *p2;
 141                                 lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);
 142                                 p4++;
 143                                 p2++;
 144                         }
 145                 }
 146                 else {
 147                         while (Compare16Bits(p1, p2) == -1) p1++;
 148                         while (Compare16Bits(p1, p2) == 1) p2++;
 149                 }
 150         }
 151         p3->even = 0; p3->odd = 0;
 152         p4->even = 0; p4->odd = 0;
 153         statelists[0].len = p3 - statelists[0].head.slhead;
 154         statelists[1].len = p4 - statelists[1].head.slhead;
 155         statelists[0].tail.sltail=--p3;
 156         statelists[1].tail.sltail=--p4;
 157
 158         // the statelists now contain possible keys. The key we are searching for must be in the
 159         // intersection of both lists. Create the intersection:
 160         qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);
 161         qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);
 162
 163         uint64_t *p5, *p6, *p7;
 164         p5 = p7 = statelists[0].head.keyhead;
 165         p6 = statelists[1].head.keyhead;
 166         while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {
 167                 if (compar_int(p5, p6) == 0) {
 168                         *p7++ = *p5++;
 169                         p6++;
 170                 }
 171                 else {
 172                         while (compar_int(p5, p6) == -1) p5++;
 173                         while (compar_int(p5, p6) == 1) p6++;
 174                 }
 175         }
 176         statelists[0].len = p7 - statelists[0].head.keyhead;
 177         statelists[0].tail.keytail=--p7;
 178
 179         memset(resultKey, 0, 6);
 180         // The list may still contain several key candidates. Test each of them with mfCheckKeys
 181         for (i = 0; i < statelists[0].len; i++) {
 182                 uint8_t keyBlock[6];
 183                 uint64_t key64;
 184                 crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);
 185                 num_to_bytes(key64, 6, keyBlock);
 186                 key64 = 0;
 187                 if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, 1, keyBlock, &key64)) {
 188                         num_to_bytes(key64, 6, resultKey);
 189                         break;
 190                 }
 191         }
 192
 193         free(statelists[0].head.slhead);
 194         free(statelists[1].head.slhead);
 195
 196         return 0;
 197 }
 198
 199 int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){
 200
 201         *key = 0;
 202
 203         UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};
 204         memcpy(c.d.asBytes, keyBlock, 6 * keycnt);
 205         SendCommand(&c);
 206
 207         UsbCommand resp;
 208         if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;
 209         if ((resp.arg[0] & 0xff) != 0x01) return 2;
 210         *key = bytes_to_num(resp.d.asBytes, 6);
 211         return 0;
 212 }
 213
 214 // EMULATOR
 215
 216 int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 217         UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};
 218         SendCommand(&c);
 219
 220         UsbCommand resp;
 221         if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;
 222         memcpy(data, resp.d.asBytes, blocksCount * 16);
 223         return 0;
 224 }
 225
 226 int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 227         UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
 228         memcpy(c.d.asBytes, data, blocksCount * 16);
 229         SendCommand(&c);
 230         return 0;
 231 }
 232
 233 // "MAGIC" CARD
 234
 235 int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, bool wantWipe) {
 236         uint8_t oldblock0[16] = {0x00};
 237         uint8_t block0[16] = {0x00};
 238
 239         int old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER);
 240         if (old == 0) {
 241                 memcpy(block0, oldblock0, 16);
 242                 PrintAndLog("old block 0:  %s", sprint_hex(block0,16));
 243         } else {
 244                 PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");
 245         }
 246
 247         // fill in the new values
 248         // UID
 249         memcpy(block0, uid, 4);
 250         // Mifare UID BCC
 251         block0[4] = block0[0]^block0[1]^block0[2]^block0[3];
 252         // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)
 253         if (sak!=NULL)
 254                 block0[5]=sak[0];
 255         if (atqa!=NULL) {
 256                 block0[6]=atqa[1];
 257                 block0[7]=atqa[0];
 258         }
 259         PrintAndLog("new block 0:  %s", sprint_hex(block0,16));
 260         return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);
 261 }
 262
 263 int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {
 264
 265         uint8_t isOK = 0;
 266         UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};
 267         memcpy(c.d.asBytes, data, 16);
 268         SendCommand(&c);
 269
 270         UsbCommand resp;
 271         if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
 272                 isOK  = resp.arg[0] & 0xff;
 273                 if (uid != NULL)
 274                         memcpy(uid, resp.d.asBytes, 4);
 275                 if (!isOK)
 276                         return 2;
 277         } else {
 278                 PrintAndLog("Command execute timeout");
 279                 return 1;
 280         }
 281         return 0;
 282 }
 283
 284 int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {
 285         uint8_t isOK = 0;
 286
 287         UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};
 288         SendCommand(&c);
 289
 290   UsbCommand resp;
 291         if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
 292                 isOK  = resp.arg[0] & 0xff;
 293                 memcpy(data, resp.d.asBytes, 16);
 294                 if (!isOK) return 2;
 295         } else {
 296                 PrintAndLog("Command execute timeout");
 297                 return 1;
 298         }
 299         return 0;
 300 }
 301
 302 // SNIFFER
 303
 304 // constants
 305 static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};
 306
 307 // variables
 308 char logHexFileName[FILE_PATH_SIZE] = {0x00};
 309 static uint8_t traceCard[4096] = {0x00};
 310 static char traceFileName[FILE_PATH_SIZE] = {0x00};
 311 static int traceState = TRACE_IDLE;
 312 static uint8_t traceCurBlock = 0;
 313 static uint8_t traceCurKey = 0;
 314
 315 struct Crypto1State *traceCrypto1 = NULL;
 316
 317 struct Crypto1State *revstate = NULL;
 318
 319 uint64_t key = 0;
 320 uint32_t ks2 = 0;
 321 uint32_t ks3 = 0;
 322
 323 uint32_t uid = 0;     // serial number
 324 uint32_t nt =0;      // tag challenge
 325 uint32_t nr_enc =0;  // encrypted reader challenge
 326 uint32_t ar_enc =0;  // encrypted reader response
 327 uint32_t at_enc =0;  // encrypted tag response
 328
 329 int isTraceCardEmpty(void) {
 330         return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));
 331 }
 332
 333 int isBlockEmpty(int blockN) {
 334         for (int i = 0; i < 16; i++)
 335                 if (traceCard[blockN * 16 + i] != 0) return 0;
 336
 337         return 1;
 338 }
 339
 340 int isBlockTrailer(int blockN) {
 341  return ((blockN & 0x03) == 0x03);
 342 }
 343
 344 int loadTraceCard(uint8_t *tuid) {
 345         FILE * f;
 346         char buf[64] = {0x00};
 347         uint8_t buf8[64] = {0x00};
 348         int i, blockNum;
 349
 350         if (!isTraceCardEmpty())
 351                 saveTraceCard();
 352
 353         memset(traceCard, 0x00, 4096);
 354         memcpy(traceCard, tuid + 3, 4);
 355
 356         FillFileNameByUID(traceFileName, tuid, ".eml", 7);
 357
 358         f = fopen(traceFileName, "r");
 359         if (!f) return 1;
 360
 361         blockNum = 0;
 362
 363         while(!feof(f)){
 364
 365                 memset(buf, 0, sizeof(buf));
 366                 if (fgets(buf, sizeof(buf), f) == NULL) {
 367                         PrintAndLog("File reading error.");
 368                         fclose(f);
 369                         return 2;
 370                 }
 371
 372                 if (strlen(buf) < 32){
 373                         if (feof(f)) break;
 374                         PrintAndLog("File content error. Block data must include 32 HEX symbols");
 375                         fclose(f);
 376                         return 2;
 377                 }
 378                 for (i = 0; i < 32; i += 2)
 379                         sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);
 380
 381                 memcpy(traceCard + blockNum * 16, buf8, 16);
 382
 383                 blockNum++;
 384         }
 385         fclose(f);
 386
 387         return 0;
 388 }
 389
 390 int saveTraceCard(void) {
 391         FILE * f;
 392
 393         if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;
 394
 395         f = fopen(traceFileName, "w+");
 396         if ( !f ) return 1;
 397
 398         for (int i = 0; i < 64; i++) {  // blocks
 399                 for (int j = 0; j < 16; j++)  // bytes
 400                         fprintf(f, "%02x", *(traceCard + i * 16 + j));
 401                 fprintf(f,"\n");
 402         }
 403         fclose(f);
 404         return 0;
 405 }
 406
 407 int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {
 408
 409         if (traceCrypto1)
 410                 crypto1_destroy(traceCrypto1);
 411
 412         traceCrypto1 = NULL;
 413
 414         if (wantSaveToEmlFile)
 415                 loadTraceCard(tuid);
 416
 417         traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];
 418         traceCard[5] = sak;
 419         memcpy(&traceCard[6], atqa, 2);
 420         traceCurBlock = 0;
 421         uid = bytes_to_num(tuid + 3, 4);
 422
 423         traceState = TRACE_IDLE;
 424
 425         return 0;
 426 }
 427
 428 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){
 429         uint8_t bt = 0;
 430         int i;
 431
 432         if (len != 1) {
 433                 for (i = 0; i < len; i++)
 434                         data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];
 435         } else {
 436                 bt = 0;
 437                 for (i = 0; i < 4; i++)
 438                         bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;
 439
 440                 data[0] = bt;
 441         }
 442         return;
 443 }
 444
 445
 446 int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 447         uint8_t data[64];
 448
 449         if (traceState == TRACE_ERROR) return 1;
 450         if (len > 64) {
 451                 traceState = TRACE_ERROR;
 452                 return 1;
 453         }
 454
 455         memcpy(data, data_src, len);
 456         if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {
 457                 mf_crypto1_decrypt(traceCrypto1, data, len, 0);
 458                 PrintAndLog("dec> %s", sprint_hex(data, len));
 459                 AddLogHex(logHexFileName, "dec> ", data, len);
 460         }
 461
 462         switch (traceState) {
 463         case TRACE_IDLE:
 464                 // check packet crc16!
 465                 if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {
 466                         PrintAndLog("dec> CRC ERROR!!!");
 467                         AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");
 468                         traceState = TRACE_ERROR;  // do not decrypt the next commands
 469                         return 1;
 470                 }
 471
 472                 // AUTHENTICATION
 473                 if ((len == 4) && ((data[0] == 0x60) || (data[0] == 0x61))) {
 474                         traceState = TRACE_AUTH1;
 475                         traceCurBlock = data[1];
 476                         traceCurKey = data[0] == 60 ? 1:0;
 477                         return 0;
 478                 }
 479
 480                 // READ
 481                 if ((len ==4) && ((data[0] == 0x30))) {
 482                         traceState = TRACE_READ_DATA;
 483                         traceCurBlock = data[1];
 484                         return 0;
 485                 }
 486
 487                 // WRITE
 488                 if ((len ==4) && ((data[0] == 0xA0))) {
 489                         traceState = TRACE_WRITE_OK;
 490                         traceCurBlock = data[1];
 491                         return 0;
 492                 }
 493
 494                 // HALT
 495                 if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {
 496                         traceState = TRACE_ERROR;  // do not decrypt the next commands
 497                         return 0;
 498                 }
 499
 500                 return 0;
 501         break;
 502
 503         case TRACE_READ_DATA:
 504                 if (len == 18) {
 505                         traceState = TRACE_IDLE;
 506
 507                         if (isBlockTrailer(traceCurBlock)) {
 508                                 memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);
 509                         } else {
 510                                 memcpy(traceCard + traceCurBlock * 16, data, 16);
 511                         }
 512                         if (wantSaveToEmlFile) saveTraceCard();
 513                         return 0;
 514                 } else {
 515                         traceState = TRACE_ERROR;
 516                         return 1;
 517                 }
 518         break;
 519
 520         case TRACE_WRITE_OK:
 521                 if ((len == 1) && (data[0] == 0x0a)) {
 522                         traceState = TRACE_WRITE_DATA;
 523
 524                         return 0;
 525                 } else {
 526                         traceState = TRACE_ERROR;
 527                         return 1;
 528                 }
 529         break;
 530
 531         case TRACE_WRITE_DATA:
 532                 if (len == 18) {
 533                         traceState = TRACE_IDLE;
 534
 535                         memcpy(traceCard + traceCurBlock * 16, data, 16);
 536                         if (wantSaveToEmlFile) saveTraceCard();
 537                         return 0;
 538                 } else {
 539                         traceState = TRACE_ERROR;
 540                         return 1;
 541                 }
 542         break;
 543
 544         case TRACE_AUTH1:
 545                 if (len == 4) {
 546                         traceState = TRACE_AUTH2;
 547                         nt = bytes_to_num(data, 4);
 548                         return 0;
 549                 } else {
 550                         traceState = TRACE_ERROR;
 551                         return 1;
 552                 }
 553         break;
 554
 555         case TRACE_AUTH2:
 556                 if (len == 8) {
 557                         traceState = TRACE_AUTH_OK;
 558
 559                         nr_enc = bytes_to_num(data, 4);
 560                         ar_enc = bytes_to_num(data + 4, 4);
 561                         return 0;
 562                 } else {
 563                         traceState = TRACE_ERROR;
 564                         return 1;
 565                 }
 566         break;
 567
 568         case TRACE_AUTH_OK:
 569                 if (len ==4) {
 570                         traceState = TRACE_IDLE;
 571
 572                         at_enc = bytes_to_num(data, 4);
 573
 574                         //  decode key here)
 575                         ks2 = ar_enc ^ prng_successor(nt, 64);
 576                         ks3 = at_enc ^ prng_successor(nt, 96);
 577                         revstate = lfsr_recovery64(ks2, ks3);
 578                         lfsr_rollback_word(revstate, 0, 0);
 579                         lfsr_rollback_word(revstate, 0, 0);
 580                         lfsr_rollback_word(revstate, nr_enc, 1);
 581                         lfsr_rollback_word(revstate, uid ^ nt, 0);
 582
 583                         crypto1_get_lfsr(revstate, &key);
 584                         printf("Key: %012"llx"\n",key);
 585                         AddLogUint64(logHexFileName, "key: ", key);
 586
 587                         int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;
 588                         if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);
 589
 590                         if (traceCurKey) {
 591                                 num_to_bytes(key, 6, traceCard + blockShift + 10);
 592                         } else {
 593                                 num_to_bytes(key, 6, traceCard + blockShift);
 594                         }
 595                         if (wantSaveToEmlFile) saveTraceCard();
 596
 597                         if (traceCrypto1) {
 598                                 crypto1_destroy(traceCrypto1);
 599                         }
 600
 601                         // set cryptosystem state
 602                         traceCrypto1 = lfsr_recovery64(ks2, ks3);
 603
 604 //      nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;
 605
 606         /*      traceCrypto1 = crypto1_create(key); // key in lfsr
 607                 crypto1_word(traceCrypto1, nt ^ uid, 0);
 608                 crypto1_word(traceCrypto1, ar, 1);
 609                 crypto1_word(traceCrypto1, 0, 0);
 610                 crypto1_word(traceCrypto1, 0, 0);*/
 611
 612                         return 0;
 613                 } else {
 614                         traceState = TRACE_ERROR;
 615                         return 1;
 616                 }
 617         break;
 618
 619         default:
 620                 traceState = TRACE_ERROR;
 621                 return 1;
 622         }
 623
 624         return 0;
 625 }