git.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 // MIFARE
  19 int compar_int(const void * a, const void * b) {
  20         // didn't work: (the result is truncated to 32 bits)
  21         //return (*(uint64_t*)b - *(uint64_t*)a);
  22
  23         // better:
  24         if (*(uint64_t*)b == *(uint64_t*)a) return 0;
  25         else if (*(uint64_t*)b > *(uint64_t*)a) return 1;
  26         else return -1;
  27 }
  28
  29 // Compare 16 Bits out of cryptostate
  30 int Compare16Bits(const void * a, const void * b) {
  31         if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;
  32         else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;
  33         else return -1;
  34 }
  35
  36 typedef
  37         struct {
  38                 union {
  39                         struct Crypto1State *slhead;
  40                         uint64_t *keyhead;
  41                 } head;
  42                 union {
  43                         struct Crypto1State *sltail;
  44                         uint64_t *keytail;
  45                 } tail;
  46                 uint32_t len;
  47                 uint32_t uid;
  48                 uint32_t blockNo;
  49                 uint32_t keyType;
  50                 uint32_t nt;
  51                 uint32_t ks1;
  52         } StateList_t;
  53
  54
  55 // wrapper function for multi-threaded lfsr_recovery32
  56 void* nested_worker_thread(void *arg)
  57 {
  58         struct Crypto1State *p1;
  59         StateList_t *statelist = arg;
  60
  61         statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);
  62         for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);
  63         statelist->len = p1 - statelist->head.slhead;
  64         statelist->tail.sltail = --p1;
  65         qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);
  66
  67         return statelist->head.slhead;
  68 }
  69
  70 int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate)
  71 {
  72         uint16_t i, len;
  73         uint32_t uid;
  74         UsbCommand resp;
  75
  76         StateList_t statelists[2];
  77         struct Crypto1State *p1, *p2, *p3, *p4;
  78
  79         // flush queue
  80         WaitForResponseTimeout(CMD_ACK,NULL,100);
  81
  82         UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};
  83         memcpy(c.d.asBytes, key, 6);
  84         SendCommand(&c);
  85
  86         if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
  87                 len = resp.arg[1];
  88                 if (len == 2) {
  89                         memcpy(&uid, resp.d.asBytes, 4);
  90                         PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);
  91
  92                         for (i = 0; i < 2; i++) {
  93                                 statelists[i].blockNo = resp.arg[2] & 0xff;
  94                                 statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;
  95                                 statelists[i].uid = uid;
  96
  97                                 memcpy(&statelists[i].nt,  (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);
  98                                 memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);
  99                         }
 100                 }
 101                 else {
 102                         PrintAndLog("Got 0 keys from proxmark.");
 103                         return 1;
 104                 }
 105         }
 106
 107         // calc keys
 108
 109         pthread_t thread_id[2];
 110
 111         // create and run worker threads
 112         for (i = 0; i < 2; i++) {
 113                 pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);
 114         }
 115
 116         // wait for threads to terminate:
 117         for (i = 0; i < 2; i++) {
 118                 pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);
 119         }
 120
 121
 122         // the first 16 Bits of the cryptostate already contain part of our key.
 123         // Create the intersection of the two lists based on these 16 Bits and
 124         // roll back the cryptostate
 125         p1 = p3 = statelists[0].head.slhead;
 126         p2 = p4 = statelists[1].head.slhead;
 127         while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {
 128                 if (Compare16Bits(p1, p2) == 0) {
 129                         struct Crypto1State savestate, *savep = &savestate;
 130                         savestate = *p1;
 131                         while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {
 132                                 *p3 = *p1;
 133                                 lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);
 134                                 p3++;
 135                                 p1++;
 136                         }
 137                         savestate = *p2;
 138                         while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {
 139                                 *p4 = *p2;
 140                                 lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);
 141                                 p4++;
 142                                 p2++;
 143                         }
 144                 }
 145                 else {
 146                         while (Compare16Bits(p1, p2) == -1) p1++;
 147                         while (Compare16Bits(p1, p2) == 1) p2++;
 148                 }
 149         }
 150         p3->even = 0; p3->odd = 0;
 151         p4->even = 0; p4->odd = 0;
 152         statelists[0].len = p3 - statelists[0].head.slhead;
 153         statelists[1].len = p4 - statelists[1].head.slhead;
 154         statelists[0].tail.sltail=--p3;
 155         statelists[1].tail.sltail=--p4;
 156
 157         // the statelists now contain possible keys. The key we are searching for must be in the
 158         // intersection of both lists. Create the intersection:
 159         qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);
 160         qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);
 161
 162         uint64_t *p5, *p6, *p7;
 163         p5 = p7 = statelists[0].head.keyhead;
 164         p6 = statelists[1].head.keyhead;
 165         while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {
 166                 if (compar_int(p5, p6) == 0) {
 167                         *p7++ = *p5++;
 168                         p6++;
 169                 }
 170                 else {
 171                         while (compar_int(p5, p6) == -1) p5++;
 172                         while (compar_int(p5, p6) == 1) p6++;
 173                 }
 174         }
 175         statelists[0].len = p7 - statelists[0].head.keyhead;
 176         statelists[0].tail.keytail=--p7;
 177
 178         memset(resultKey, 0, 6);
 179         // The list may still contain several key candidates. Test each of them with mfCheckKeys
 180         for (i = 0; i < statelists[0].len; i++) {
 181                 uint8_t keyBlock[6];
 182                 uint64_t key64;
 183                 crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);
 184                 num_to_bytes(key64, 6, keyBlock);
 185                 key64 = 0;
 186                 if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, 1, keyBlock, &key64)) {
 187                         num_to_bytes(key64, 6, resultKey);
 188                         break;
 189                 }
 190         }
 191
 192         free(statelists[0].head.slhead);
 193         free(statelists[1].head.slhead);
 194
 195         return 0;
 196 }
 197
 198 int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){
 199
 200         *key = 0;
 201
 202         UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};
 203         memcpy(c.d.asBytes, keyBlock, 6 * keycnt);
 204         SendCommand(&c);
 205
 206         UsbCommand resp;
 207         if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;
 208         if ((resp.arg[0] & 0xff) != 0x01) return 2;
 209         *key = bytes_to_num(resp.d.asBytes, 6);
 210         return 0;
 211 }
 212
 213 // EMULATOR
 214
 215 int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 216         UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};
 217         SendCommand(&c);
 218
 219   UsbCommand resp;
 220         if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;
 221         memcpy(data, resp.d.asBytes, blocksCount * 16);
 222         return 0;
 223 }
 224
 225 int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 226         UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
 227         memcpy(c.d.asBytes, data, blocksCount * 16);
 228         SendCommand(&c);
 229         return 0;
 230 }
 231
 232 // "MAGIC" CARD
 233
 234 int mfCSetUID(uint8_t *uid, uint8_t *oldUID, bool wantWipe) {
 235
 236         uint8_t oldblock0[16] = {0x00};
 237         uint8_t block0[16] = {0x00};
 238         memcpy(block0, uid, 4);
 239         block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC
 240         // mifare classic SAK(byte 5) and ATQA(byte 6 and 7)
 241         //block0[5] = 0x08;
 242         //block0[6] = 0x04;
 243         //block0[7] = 0x00;
 244
 245         block0[5] = 0x01;  //sak
 246         block0[6] = 0x01;
 247         block0[7] = 0x0f;
 248
 249         int old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER);
 250         if ( old == 0) {
 251                 memcpy(block0+8, oldblock0+8, 8);
 252                 PrintAndLog("block 0:  %s", sprint_hex(block0,16));
 253         } else {
 254                 PrintAndLog("Couldn't get olddata. Will write over the last bytes of Block 0.");
 255         }
 256         return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);
 257 }
 258
 259 int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {
 260
 261         uint8_t isOK = 0;
 262         UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};
 263         memcpy(c.d.asBytes, data, 16);
 264         SendCommand(&c);
 265
 266   UsbCommand resp;
 267         if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
 268                 isOK  = resp.arg[0] & 0xff;
 269                 if (uid != NULL)
 270                         memcpy(uid, resp.d.asBytes, 4);
 271                 if (!isOK)
 272                         return 2;
 273         } else {
 274                 PrintAndLog("Command execute timeout");
 275                 return 1;
 276         }
 277         return 0;
 278 }
 279
 280 int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {
 281         uint8_t isOK = 0;
 282
 283         UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};
 284         SendCommand(&c);
 285
 286   UsbCommand resp;
 287         if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
 288                 isOK  = resp.arg[0] & 0xff;
 289                 memcpy(data, resp.d.asBytes, 16);
 290                 if (!isOK) return 2;
 291         } else {
 292                 PrintAndLog("Command execute timeout");
 293                 return 1;
 294         }
 295         return 0;
 296 }
 297
 298 // SNIFFER
 299
 300 // constants
 301 static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};
 302
 303 // variables
 304 char logHexFileName[200] = {0x00};
 305 static uint8_t traceCard[4096] = {0x00};
 306 static char traceFileName[200] = {0x00};
 307 static int traceState = TRACE_IDLE;
 308 static uint8_t traceCurBlock = 0;
 309 static uint8_t traceCurKey = 0;
 310
 311 struct Crypto1State *traceCrypto1 = NULL;
 312
 313 struct Crypto1State *revstate;
 314 uint64_t lfsr;
 315 uint32_t ks2;
 316 uint32_t ks3;
 317
 318 uint32_t uid;     // serial number
 319 uint32_t nt;      // tag challenge
 320 uint32_t nr_enc;  // encrypted reader challenge
 321 uint32_t ar_enc;  // encrypted reader response
 322 uint32_t at_enc;  // encrypted tag response
 323
 324 int isTraceCardEmpty(void) {
 325         return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));
 326 }
 327
 328 int isBlockEmpty(int blockN) {
 329         for (int i = 0; i < 16; i++)
 330                 if (traceCard[blockN * 16 + i] != 0) return 0;
 331
 332         return 1;
 333 }
 334
 335 int isBlockTrailer(int blockN) {
 336  return ((blockN & 0x03) == 0x03);
 337 }
 338
 339 int loadTraceCard(uint8_t *tuid) {
 340         FILE * f;
 341         char buf[64] = {0x00};
 342         uint8_t buf8[64] = {0x00};
 343         int i, blockNum;
 344
 345         if (!isTraceCardEmpty())
 346                 saveTraceCard();
 347
 348         memset(traceCard, 0x00, 4096);
 349         memcpy(traceCard, tuid + 3, 4);
 350
 351         FillFileNameByUID(traceFileName, tuid, ".eml", 7);
 352
 353         f = fopen(traceFileName, "r");
 354         if (!f) return 1;
 355
 356         blockNum = 0;
 357         while(!feof(f)){
 358                 memset(buf, 0, sizeof(buf));
 359                 if (fgets(buf, sizeof(buf), f) == NULL) {
 360                         PrintAndLog("File reading error.");
 361                         fclose(f);
 362                         return 2;
 363         }
 364
 365                 if (strlen(buf) < 32){
 366                         if (feof(f)) break;
 367                         PrintAndLog("File content error. Block data must include 32 HEX symbols");
 368                         fclose(f);
 369                         return 2;
 370                 }
 371                 for (i = 0; i < 32; i += 2)
 372                         sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);
 373
 374                 memcpy(traceCard + blockNum * 16, buf8, 16);
 375
 376                 blockNum++;
 377         }
 378         fclose(f);
 379
 380         return 0;
 381 }
 382
 383 int saveTraceCard(void) {
 384         FILE * f;
 385
 386         if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;
 387
 388         f = fopen(traceFileName, "w+");
 389         for (int i = 0; i < 64; i++) {  // blocks
 390                 for (int j = 0; j < 16; j++)  // bytes
 391                         fprintf(f, "%02x", *(traceCard + i * 16 + j));
 392                 fprintf(f,"\n");
 393         }
 394         fclose(f);
 395
 396         return 0;
 397 }
 398
 399 int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {
 400
 401         if (traceCrypto1)
 402                 crypto1_destroy(traceCrypto1);
 403
 404         traceCrypto1 = NULL;
 405
 406         if (wantSaveToEmlFile)
 407                 loadTraceCard(tuid);
 408
 409         traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];
 410         traceCard[5] = sak;
 411         memcpy(&traceCard[6], atqa, 2);
 412         traceCurBlock = 0;
 413         uid = bytes_to_num(tuid + 3, 4);
 414
 415         traceState = TRACE_IDLE;
 416
 417         return 0;
 418 }
 419
 420 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){
 421         uint8_t bt = 0;
 422         int i;
 423
 424         if (len != 1) {
 425                 for (i = 0; i < len; i++)
 426                         data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];
 427         } else {
 428                 bt = 0;
 429                 for (i = 0; i < 4; i++)
 430                         bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;
 431
 432                 data[0] = bt;
 433         }
 434         return;
 435 }
 436
 437
 438 int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 439         uint8_t data[64];
 440
 441         if (traceState == TRACE_ERROR) return 1;
 442         if (len > 64) {
 443                 traceState = TRACE_ERROR;
 444                 return 1;
 445         }
 446
 447         memcpy(data, data_src, len);
 448         if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {
 449                 mf_crypto1_decrypt(traceCrypto1, data, len, 0);
 450                 PrintAndLog("dec> %s", sprint_hex(data, len));
 451                 AddLogHex(logHexFileName, "dec> ", data, len);
 452         }
 453
 454         switch (traceState) {
 455         case TRACE_IDLE:
 456                 // check packet crc16!
 457                 if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {
 458                         PrintAndLog("dec> CRC ERROR!!!");
 459                         AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");
 460                         traceState = TRACE_ERROR;  // do not decrypt the next commands
 461                         return 1;
 462                 }
 463
 464                 // AUTHENTICATION
 465                 if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {
 466                         traceState = TRACE_AUTH1;
 467                         traceCurBlock = data[1];
 468                         traceCurKey = data[0] == 60 ? 1:0;
 469                         return 0;
 470                 }
 471
 472                 // READ
 473                 if ((len ==4) && ((data[0] == 0x30))) {
 474                         traceState = TRACE_READ_DATA;
 475                         traceCurBlock = data[1];
 476                         return 0;
 477                 }
 478
 479                 // WRITE
 480                 if ((len ==4) && ((data[0] == 0xA0))) {
 481                         traceState = TRACE_WRITE_OK;
 482                         traceCurBlock = data[1];
 483                         return 0;
 484                 }
 485
 486                 // HALT
 487                 if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {
 488                         traceState = TRACE_ERROR;  // do not decrypt the next commands
 489                         return 0;
 490                 }
 491
 492                 return 0;
 493         break;
 494
 495         case TRACE_READ_DATA:
 496                 if (len == 18) {
 497                         traceState = TRACE_IDLE;
 498
 499                         if (isBlockTrailer(traceCurBlock)) {
 500                                 memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);
 501                         } else {
 502                                 memcpy(traceCard + traceCurBlock * 16, data, 16);
 503                         }
 504                         if (wantSaveToEmlFile) saveTraceCard();
 505                         return 0;
 506                 } else {
 507                         traceState = TRACE_ERROR;
 508                         return 1;
 509                 }
 510         break;
 511
 512         case TRACE_WRITE_OK:
 513                 if ((len == 1) && (data[0] == 0x0a)) {
 514                         traceState = TRACE_WRITE_DATA;
 515
 516                         return 0;
 517                 } else {
 518                         traceState = TRACE_ERROR;
 519                         return 1;
 520                 }
 521         break;
 522
 523         case TRACE_WRITE_DATA:
 524                 if (len == 18) {
 525                         traceState = TRACE_IDLE;
 526
 527                         memcpy(traceCard + traceCurBlock * 16, data, 16);
 528                         if (wantSaveToEmlFile) saveTraceCard();
 529                         return 0;
 530                 } else {
 531                         traceState = TRACE_ERROR;
 532                         return 1;
 533                 }
 534         break;
 535
 536         case TRACE_AUTH1:
 537                 if (len == 4) {
 538                         traceState = TRACE_AUTH2;
 539                         nt = bytes_to_num(data, 4);
 540                         return 0;
 541                 } else {
 542                         traceState = TRACE_ERROR;
 543                         return 1;
 544                 }
 545         break;
 546
 547         case TRACE_AUTH2:
 548                 if (len == 8) {
 549                         traceState = TRACE_AUTH_OK;
 550
 551                         nr_enc = bytes_to_num(data, 4);
 552                         ar_enc = bytes_to_num(data + 4, 4);
 553                         return 0;
 554                 } else {
 555                         traceState = TRACE_ERROR;
 556                         return 1;
 557                 }
 558         break;
 559
 560         case TRACE_AUTH_OK:
 561                 if (len ==4) {
 562                         traceState = TRACE_IDLE;
 563
 564                         at_enc = bytes_to_num(data, 4);
 565
 566                         //  decode key here)
 567                         ks2 = ar_enc ^ prng_successor(nt, 64);
 568                         ks3 = at_enc ^ prng_successor(nt, 96);
 569                         revstate = lfsr_recovery64(ks2, ks3);
 570                         lfsr_rollback_word(revstate, 0, 0);
 571                         lfsr_rollback_word(revstate, 0, 0);
 572                         lfsr_rollback_word(revstate, nr_enc, 1);
 573                         lfsr_rollback_word(revstate, uid ^ nt, 0);
 574
 575                         crypto1_get_lfsr(revstate, &lfsr);
 576                         printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));
 577                         AddLogUint64(logHexFileName, "key> ", lfsr);
 578
 579                         int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;
 580                         if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);
 581
 582                         if (traceCurKey) {
 583                                 num_to_bytes(lfsr, 6, traceCard + blockShift + 10);
 584                         } else {
 585                                 num_to_bytes(lfsr, 6, traceCard + blockShift);
 586                         }
 587                         if (wantSaveToEmlFile) saveTraceCard();
 588
 589                         if (traceCrypto1) {
 590                                 crypto1_destroy(traceCrypto1);
 591                         }
 592
 593                         // set cryptosystem state
 594                         traceCrypto1 = lfsr_recovery64(ks2, ks3);
 595
 596 //      nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;
 597
 598         /*      traceCrypto1 = crypto1_create(lfsr); // key in lfsr
 599                 crypto1_word(traceCrypto1, nt ^ uid, 0);
 600                 crypto1_word(traceCrypto1, ar, 1);
 601                 crypto1_word(traceCrypto1, 0, 0);
 602                 crypto1_word(traceCrypto1, 0, 0);*/
 603
 604                         return 0;
 605                 } else {
 606                         traceState = TRACE_ERROR;
 607                         return 1;
 608                 }
 609         break;
 610
 611         default:
 612                 traceState = TRACE_ERROR;
 613                 return 1;
 614         }
 615
 616         return 0;
 617 }