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

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) Merlok - 2017
   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 // Command: hf mf list. It shows data from arm buffer.
   9 //-----------------------------------------------------------------------------
  10
  11 #include "cmdhflist.h"
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <stdint.h>
  17 #include <stdbool.h>
  18 #include "util.h"
  19 #include "ui.h"
  20 #include "iso14443crc.h"
  21 #include "parity.h"
  22 #include "protocols.h"
  23 #include "crapto1/crapto1.h"
  24 #include "mifarehost.h"
  25 #include "mifaredefault.h"
  26
  27
  28 enum MifareAuthSeq {
  29         masNone,
  30         masNt,
  31         masNrAr,
  32         masAt,
  33         masAuthComplete,
  34         masFirstData,
  35         masData,
  36         masError,
  37 };
  38 static enum MifareAuthSeq MifareAuthState;
  39 static TAuthData AuthData;
  40
  41 void ClearAuthData() {
  42         AuthData.uid = 0;
  43         AuthData.nt = 0;
  44         AuthData.first_auth = true;
  45         AuthData.ks2 = 0;
  46         AuthData.ks3 = 0;
  47 }
  48
  49 /**
  50  * @brief iso14443A_CRC_check Checks CRC in command or response
  51  * @param isResponse
  52  * @param data
  53  * @param len
  54  * @return  0 : CRC-command, CRC not ok
  55  *          1 : CRC-command, CRC ok
  56  *          2 : Not crc-command
  57  */
  58 uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  59 {
  60         uint8_t b1,b2;
  61
  62         if(len <= 2) return 2;
  63
  64         if(isResponse & (len < 6)) return 2;
  65
  66         ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
  67         if (b1 != data[len-2] || b2 != data[len-1]) {
  68                 return 0;
  69         } else {
  70                 return 1;
  71         }
  72 }
  73
  74 uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  75 {
  76         switch(MifareAuthState) {
  77                 case masNone:
  78                 case masError:
  79                         return iso14443A_CRC_check(isResponse, data, len);
  80                 default:
  81                         return 2;
  82         }
  83 }
  84
  85 void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
  86 {
  87         switch(cmd[0])
  88         {
  89         case ICLASS_CMD_ACTALL:      snprintf(exp,size,"ACTALL"); break;
  90         case ICLASS_CMD_READ_OR_IDENTIFY:{
  91                 if(cmdsize > 1){
  92                         snprintf(exp,size,"READ(%d)",cmd[1]);
  93                 }else{
  94                         snprintf(exp,size,"IDENTIFY");
  95                 }
  96                 break;
  97         }
  98         case ICLASS_CMD_SELECT:      snprintf(exp,size,"SELECT"); break;
  99         case ICLASS_CMD_PAGESEL:     snprintf(exp,size,"PAGESEL(%d)", cmd[1]); break;
 100         case ICLASS_CMD_READCHECK_KC:snprintf(exp,size,"READCHECK[Kc](%d)", cmd[1]); break;
 101         case ICLASS_CMD_READCHECK_KD:snprintf(exp,size,"READCHECK[Kd](%d)", cmd[1]); break;
 102         case ICLASS_CMD_CHECK:       snprintf(exp,size,"CHECK"); break;
 103         case ICLASS_CMD_DETECT:      snprintf(exp,size,"DETECT"); break;
 104         case ICLASS_CMD_HALT:        snprintf(exp,size,"HALT"); break;
 105         case ICLASS_CMD_UPDATE:      snprintf(exp,size,"UPDATE(%d)",cmd[1]); break;
 106         case ICLASS_CMD_ACT:         snprintf(exp,size,"ACT"); break;
 107         case ICLASS_CMD_READ4:       snprintf(exp,size,"READ4(%d)",cmd[1]); break;
 108         default:                     snprintf(exp,size,"?"); break;
 109         }
 110         return;
 111 }
 112
 113 void annotateIso15693(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
 114 {
 115
 116         if(cmd[0] == 0x26)
 117         {
 118                 switch(cmd[1]){
 119                 case ISO15693_INVENTORY           :snprintf(exp, size, "INVENTORY");break;
 120                 case ISO15693_STAYQUIET           :snprintf(exp, size, "STAY_QUIET");break;
 121                 default:                     snprintf(exp,size,"?"); break;
 122
 123                 }
 124         }else if(cmd[0] == 0x02)
 125         {
 126                 switch(cmd[1])
 127                 {
 128                 case ISO15693_READBLOCK            :snprintf(exp, size, "READBLOCK");break;
 129                 case ISO15693_WRITEBLOCK           :snprintf(exp, size, "WRITEBLOCK");break;
 130                 case ISO15693_LOCKBLOCK            :snprintf(exp, size, "LOCKBLOCK");break;
 131                 case ISO15693_READ_MULTI_BLOCK     :snprintf(exp, size, "READ_MULTI_BLOCK");break;
 132                 case ISO15693_SELECT               :snprintf(exp, size, "SELECT");break;
 133                 case ISO15693_RESET_TO_READY       :snprintf(exp, size, "RESET_TO_READY");break;
 134                 case ISO15693_WRITE_AFI            :snprintf(exp, size, "WRITE_AFI");break;
 135                 case ISO15693_LOCK_AFI             :snprintf(exp, size, "LOCK_AFI");break;
 136                 case ISO15693_WRITE_DSFID          :snprintf(exp, size, "WRITE_DSFID");break;
 137                 case ISO15693_LOCK_DSFID           :snprintf(exp, size, "LOCK_DSFID");break;
 138                 case ISO15693_GET_SYSTEM_INFO      :snprintf(exp, size, "GET_SYSTEM_INFO");break;
 139                 case ISO15693_READ_MULTI_SECSTATUS :snprintf(exp, size, "READ_MULTI_SECSTATUS");break;
 140                 default:                            snprintf(exp,size,"?"); break;
 141                 }
 142         }
 143 }
 144
 145
 146 void annotateTopaz(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
 147 {
 148         switch(cmd[0]) {
 149                 case TOPAZ_REQA                                         :snprintf(exp, size, "REQA");break;
 150                 case TOPAZ_WUPA                                         :snprintf(exp, size, "WUPA");break;
 151                 case TOPAZ_RID                                          :snprintf(exp, size, "RID");break;
 152                 case TOPAZ_RALL                                         :snprintf(exp, size, "RALL");break;
 153                 case TOPAZ_READ                                         :snprintf(exp, size, "READ");break;
 154                 case TOPAZ_WRITE_E                                      :snprintf(exp, size, "WRITE-E");break;
 155                 case TOPAZ_WRITE_NE                                     :snprintf(exp, size, "WRITE-NE");break;
 156                 case TOPAZ_RSEG                                         :snprintf(exp, size, "RSEG");break;
 157                 case TOPAZ_READ8                                        :snprintf(exp, size, "READ8");break;
 158                 case TOPAZ_WRITE_E8                                     :snprintf(exp, size, "WRITE-E8");break;
 159                 case TOPAZ_WRITE_NE8                            :snprintf(exp, size, "WRITE-NE8");break;
 160                 default:                            snprintf(exp,size,"?"); break;
 161         }
 162 }
 163
 164
 165 /**
 166 06 00 = INITIATE
 167 0E xx = SELECT ID (xx = Chip-ID)
 168 0B = Get UID
 169 08 yy = Read Block (yy = block number)
 170 09 yy dd dd dd dd = Write Block (yy = block number; dd dd dd dd = data to be written)
 171 0C = Reset to Inventory
 172 0F = Completion
 173 0A 11 22 33 44 55 66 = Authenticate (11 22 33 44 55 66 = data to authenticate)
 174 **/
 175
 176 void annotateIso14443b(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
 177 {
 178         switch(cmd[0]){
 179         case ISO14443B_REQB   : snprintf(exp,size,"REQB");break;
 180         case ISO14443B_ATTRIB : snprintf(exp,size,"ATTRIB");break;
 181         case ISO14443B_HALT   : snprintf(exp,size,"HALT");break;
 182         case ISO14443B_INITIATE     : snprintf(exp,size,"INITIATE");break;
 183         case ISO14443B_SELECT       : snprintf(exp,size,"SELECT(%d)",cmd[1]);break;
 184         case ISO14443B_GET_UID      : snprintf(exp,size,"GET UID");break;
 185         case ISO14443B_READ_BLK     : snprintf(exp,size,"READ_BLK(%d)", cmd[1]);break;
 186         case ISO14443B_WRITE_BLK    : snprintf(exp,size,"WRITE_BLK(%d)",cmd[1]);break;
 187         case ISO14443B_RESET        : snprintf(exp,size,"RESET");break;
 188         case ISO14443B_COMPLETION   : snprintf(exp,size,"COMPLETION");break;
 189         case ISO14443B_AUTHENTICATE : snprintf(exp,size,"AUTHENTICATE");break;
 190         default                     : snprintf(exp,size ,"?");break;
 191         }
 192
 193 }
 194
 195 void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
 196 {
 197         switch(cmd[0])
 198         {
 199         case ISO14443A_CMD_WUPA:
 200                 snprintf(exp,size,"WUPA");
 201                 break;
 202         case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
 203                 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
 204                 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
 205                 if(cmd[1] == 0x70)
 206                 {
 207                         snprintf(exp,size,"SELECT_UID"); break;
 208                 }else
 209                 {
 210                         snprintf(exp,size,"ANTICOLL"); break;
 211                 }
 212         }
 213         case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
 214                 //95 20 = Anticollision of cascade level2
 215                 //95 70 = Select of cascade level2
 216                 if(cmd[2] == 0x70)
 217                 {
 218                         snprintf(exp,size,"SELECT_UID-2"); break;
 219                 }else
 220                 {
 221                         snprintf(exp,size,"ANTICOLL-2"); break;
 222                 }
 223         }
 224         case ISO14443A_CMD_REQA:
 225                 snprintf(exp,size,"REQA");
 226                 break;
 227         case ISO14443A_CMD_READBLOCK:   snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
 228         case ISO14443A_CMD_WRITEBLOCK:  snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
 229         case ISO14443A_CMD_HALT:
 230                 snprintf(exp,size,"HALT");
 231                 MifareAuthState = masNone;
 232                 break;
 233         case ISO14443A_CMD_RATS:                snprintf(exp,size,"RATS"); break;
 234         case MIFARE_CMD_INC:                    snprintf(exp,size,"INC(%d)",cmd[1]); break;
 235         case MIFARE_CMD_DEC:                    snprintf(exp,size,"DEC(%d)",cmd[1]); break;
 236         case MIFARE_CMD_RESTORE:                snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
 237         case MIFARE_CMD_TRANSFER:               snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
 238         case MIFARE_AUTH_KEYA:
 239                 if ( cmdsize > 3) {
 240                         snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
 241                         MifareAuthState = masNt;
 242                 } else {
 243                         //      case MIFARE_ULEV1_VERSION :  both 0x60.
 244                         snprintf(exp,size,"EV1 VERSION");
 245                 }
 246                 break;
 247         case MIFARE_AUTH_KEYB:
 248                 MifareAuthState = masNt;
 249                 snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
 250                 break;
 251         case MIFARE_MAGICWUPC1:                 snprintf(exp,size,"MAGIC WUPC1"); break;
 252         case MIFARE_MAGICWUPC2:                 snprintf(exp,size,"MAGIC WUPC2"); break;
 253         case MIFARE_MAGICWIPEC:                 snprintf(exp,size,"MAGIC WIPEC"); break;
 254         case MIFARE_ULC_AUTH_1:         snprintf(exp,size,"AUTH "); break;
 255         case MIFARE_ULC_AUTH_2:         snprintf(exp,size,"AUTH_ANSW"); break;
 256         case MIFARE_ULEV1_AUTH:
 257                 if ( cmdsize == 7 )
 258                         snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
 259                 else
 260                         snprintf(exp,size,"PWD-AUTH");
 261                 break;
 262         case MIFARE_ULEV1_FASTREAD:{
 263                 if ( cmdsize >=3 && cmd[2] <= 0xE6)
 264                         snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
 265                 else
 266                         snprintf(exp,size,"?");
 267                 break;
 268         }
 269         case MIFARE_ULC_WRITE:{
 270                 if ( cmd[1] < 0x21 )
 271                         snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
 272                 else
 273                         snprintf(exp,size,"?");
 274                 break;
 275         }
 276         case MIFARE_ULEV1_READ_CNT:{
 277                 if ( cmd[1] < 5 )
 278                         snprintf(exp,size,"READ CNT(%d)",cmd[1]);
 279                 else
 280                         snprintf(exp,size,"?");
 281                 break;
 282         }
 283         case MIFARE_ULEV1_INCR_CNT:{
 284                 if ( cmd[1] < 5 )
 285                         snprintf(exp,size,"INCR(%d)",cmd[1]);
 286                 else
 287                         snprintf(exp,size,"?");
 288                 break;
 289         }
 290         case MIFARE_ULEV1_READSIG:              snprintf(exp,size,"READ_SIG"); break;
 291         case MIFARE_ULEV1_CHECKTEAR:    snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
 292         case MIFARE_ULEV1_VCSL:         snprintf(exp,size,"VCSL"); break;
 293         default:                                                snprintf(exp,size,"?"); break;
 294         }
 295         return;
 296 }
 297
 298 void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
 299         if (!isResponse && cmdsize == 1) {
 300                 switch(cmd[0]) {
 301                         case ISO14443A_CMD_WUPA:
 302                         case ISO14443A_CMD_REQA:
 303                                 MifareAuthState = masNone;
 304                                 break;
 305                         default:
 306                                 break;
 307                 }
 308         }
 309
 310         // get UID
 311         if (MifareAuthState == masNone) {
 312                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
 313                         ClearAuthData();
 314                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 315                 }
 316                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
 317                         ClearAuthData();
 318                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 319                 }
 320         }
 321
 322         switch(MifareAuthState) {
 323                 case masNt:
 324                         if (cmdsize == 4 && isResponse) {
 325                                 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
 326                                 MifareAuthState = masNrAr;
 327                                 if (AuthData.first_auth) {
 328                                         AuthData.nt = bytes_to_num(cmd, 4);
 329                                 } else {
 330                                         AuthData.nt_enc = bytes_to_num(cmd, 4);
 331                                         AuthData.nt_enc_par = parity[0];
 332                                 }
 333                                 return;
 334                         } else {
 335                                 MifareAuthState = masError;
 336                         }
 337                         break;
 338                 case masNrAr:
 339                         if (cmdsize == 8 && !isResponse) {
 340                                 snprintf(exp,size,"AUTH: nr ar (enc)");
 341                                 MifareAuthState = masAt;
 342                                 AuthData.nr_enc = bytes_to_num(cmd, 4);
 343                                 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
 344                                 AuthData.ar_enc_par = parity[0] << 4;
 345                                 return;
 346                         } else {
 347                                 MifareAuthState = masError;
 348                         }
 349                         break;
 350                 case masAt:
 351                         if (cmdsize == 4 && isResponse) {
 352                                 snprintf(exp,size,"AUTH: at (enc)");
 353                                 MifareAuthState = masAuthComplete;
 354                                 AuthData.at_enc = bytes_to_num(cmd, 4);
 355                                 AuthData.at_enc_par = parity[0];
 356                                 return;
 357                         } else {
 358                                 MifareAuthState = masError;
 359                         }
 360                         break;
 361                 default:
 362                         break;
 363         }
 364
 365         if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
 366                 annotateIso14443a(exp, size, cmd, cmdsize);
 367
 368 }
 369
 370 bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, uint8_t *parity, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
 371         static struct Crypto1State *traceCrypto1;
 372         static uint64_t mfLastKey;
 373
 374         *mfDataLen = 0;
 375
 376         if (MifareAuthState == masAuthComplete) {
 377                 if (traceCrypto1) {
 378                         crypto1_destroy(traceCrypto1);
 379                         traceCrypto1 = NULL;
 380                 }
 381
 382                 MifareAuthState = masFirstData;
 383                 return false;
 384         }
 385
 386         if (cmdsize > 32)
 387                 return false;
 388
 389         if (MifareAuthState == masFirstData) {
 390                 if (AuthData.first_auth) {
 391                         AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
 392                         AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
 393
 394                         mfLastKey = GetCrypto1ProbableKey(&AuthData);
 395                         PrintAndLog("            |          * | key | probable key:%012"PRIx64" Prng:%s   ks2:%08x ks3:%08x |     |",
 396                                 mfLastKey,
 397                                 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
 398                                 AuthData.ks2,
 399                                 AuthData.ks3);
 400
 401                         AuthData.first_auth = false;
 402
 403                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 404                 } else {
 405                         if (traceCrypto1) {
 406                                 crypto1_destroy(traceCrypto1);
 407                                 traceCrypto1 = NULL;
 408                         }
 409
 410                         // check last used key
 411                         if (mfLastKey) {
 412                                 if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize, parity)) {
 413                                         PrintAndLog("            |          * | key | last used key:%012"PRIx64"            ks2:%08x ks3:%08x |     |",
 414                                                 mfLastKey,
 415                                                 AuthData.ks2,
 416                                                 AuthData.ks3);
 417
 418                                 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 419                                 };
 420                         }
 421
 422                         // check default keys
 423                         if (!traceCrypto1) {
 424                                 for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
 425                                         if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize, parity)) {
 426                                                 PrintAndLog("            |          * | key | default key:%012"PRIx64"              ks2:%08x ks3:%08x |     |",
 427                                                         MifareDefaultKeys[defaultKeyCounter],
 428                                                         AuthData.ks2,
 429                                                         AuthData.ks3);
 430
 431                                                 mfLastKey = MifareDefaultKeys[defaultKeyCounter];
 432                                                 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 433                                                 break;
 434                                         };
 435                                 }
 436                         }
 437
 438                         // nested
 439                         if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
 440                                 uint32_t ntx = prng_successor(AuthData.nt, 90);
 441                                 for (int i = 0; i < 16383; i++) {
 442                                         ntx = prng_successor(ntx, 1);
 443                                         if (NTParityChk(&AuthData, ntx)){
 444
 445                                                 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
 446                                                 uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
 447                                                 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
 448                                                 memcpy(mfData, cmd, cmdsize);
 449                                                 mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
 450
 451                                                 crypto1_destroy(pcs);
 452                                                 if (CheckCrypto1Parity(cmd, cmdsize, mfData, parity) && CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
 453                                                         AuthData.ks2 = ks2;
 454                                                         AuthData.ks3 = ks3;
 455
 456                                                         AuthData.nt = ntx;
 457                                                         mfLastKey = GetCrypto1ProbableKey(&AuthData);
 458                                                         PrintAndLog("            |          * | key | nested probable key:%012"PRIx64"      ks2:%08x ks3:%08x |     |",
 459                                                                 mfLastKey,
 460                                                                 AuthData.ks2,
 461                                                                 AuthData.ks3);
 462
 463                                                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 464                                                         break;
 465                                                 }
 466                                         }
 467                                 }
 468                         }
 469
 470                         //hardnested
 471                         if (!traceCrypto1) {
 472                                 printf("hardnested not implemented. uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
 473                                 MifareAuthState = masError;
 474
 475                                 /* TOO SLOW( needs to have more strong filter. with this filter - aprox 4 mln tests
 476                                 uint32_t t = msclock();
 477                                 uint32_t t1 = t;
 478                                 int n = 0;
 479                                 for (uint32_t i = 0; i < 0xFFFFFFFF; i++) {
 480                                         if (NTParityChk(&AuthData, i)){
 481
 482                                                 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(i, 64);
 483                                                 uint32_t ks3 = AuthData.at_enc ^ prng_successor(i, 96);
 484                                                 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
 485
 486
 487
 488
 489                                                 n++;
 490
 491                                                 if (!(n % 100000)) {
 492                                                         printf("delta=%d n=%d ks2=%x ks3=%x \n", msclock() - t1 , n, ks2, ks3);
 493                                                         t1 = msclock();
 494                                                 }
 495
 496                                         }
 497                                 }
 498                                 printf("delta=%d n=%d\n", msclock() - t, n);
 499                                 */
 500                         }
 501                 }
 502
 503
 504
 505                 MifareAuthState = masData;
 506         }
 507
 508         if (MifareAuthState == masData && traceCrypto1) {
 509                 memcpy(mfData, cmd, cmdsize);
 510                 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
 511                 *mfDataLen = cmdsize;
 512         }
 513
 514         return *mfDataLen > 0;
 515 }
 516
 517 bool NTParityChk(TAuthData *ad, uint32_t ntx) {
 518         if (
 519                 (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
 520                 (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
 521                 (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
 522                 )
 523                 return false;
 524
 525         uint32_t ar = prng_successor(ntx, 64);
 526         if (
 527                 (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
 528                 (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
 529                 (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
 530                 )
 531                 return false;
 532
 533         uint32_t at = prng_successor(ntx, 96);
 534         if (
 535                 (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
 536                 (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
 537                 (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
 538                 (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
 539                 )
 540                 return false;
 541
 542         return true;
 543 }
 544
 545 bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize, uint8_t *parity) {
 546         uint8_t buf[32] = {0};
 547         struct Crypto1State *pcs;
 548
 549         AuthData.ks2 = 0;
 550         AuthData.ks3 = 0;
 551
 552         pcs = crypto1_create(key);
 553         uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
 554         uint32_t ar = prng_successor(nt1, 64);
 555         uint32_t at = prng_successor(nt1, 96);
 556
 557         crypto1_word(pcs, ad->nr_enc, 1);
 558 //      uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;  // if needs deciphered nr
 559         uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
 560         uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
 561
 562         if (!(ar == ar1 && at == at1 && NTParityChk(ad, nt1))) {
 563                 crypto1_destroy(pcs);
 564                 return false;
 565         }
 566
 567         memcpy(buf, cmd, cmdsize);
 568         mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
 569
 570         crypto1_destroy(pcs);
 571
 572         if (!CheckCrypto1Parity(cmd, cmdsize, buf, parity))
 573                 return false;
 574
 575         if(!CheckCrc14443(CRC_14443_A, buf, cmdsize))
 576                 return false;
 577
 578         AuthData.nt = nt1;
 579         AuthData.ks2 = AuthData.ar_enc ^ ar;
 580         AuthData.ks3 = AuthData.at_enc ^ at;
 581
 582         return true;
 583 }
 584
 585 bool CheckCrypto1Parity(uint8_t *cmd_enc, uint8_t cmdsize, uint8_t *cmd, uint8_t *parity_enc) {
 586         for (int i = 0; i < cmdsize - 1; i++) {
 587                 if (oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (7 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01))
 588                         return false;
 589         }
 590
 591         return true;
 592 }
 593
 594 uint64_t GetCrypto1ProbableKey(TAuthData *ad) {
 595         struct Crypto1State *revstate = lfsr_recovery64(ad->ks2, ad->ks3);
 596         lfsr_rollback_word(revstate, 0, 0);
 597         lfsr_rollback_word(revstate, 0, 0);
 598         lfsr_rollback_word(revstate, ad->nr_enc, 1);
 599         lfsr_rollback_word(revstate, ad->uid ^ ad->nt, 0);
 600
 601         uint64_t lfsr = 0;
 602         crypto1_get_lfsr(revstate, &lfsr);
 603         crypto1_destroy(revstate);
 604
 605         return lfsr;
 606 }