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 "data.h"
  20 #include "ui.h"
  21 #include "iso14443crc.h"
  22 #include "parity.h"
  23 #include "protocols.h"
  24 #include "crapto1/crapto1.h"
  25 #include "mifarehost.h"
  26 #include "mifaredefault.h"
  27
  28
  29 enum MifareAuthSeq {
  30         masNone,
  31         masNt,
  32         masNrAr,
  33         masAt,
  34         masAuthComplete,
  35         masFirstData,
  36         masData,
  37         masError,
  38 };
  39 static enum MifareAuthSeq MifareAuthState;
  40 static TAuthData AuthData;
  41
  42 void ClearAuthData() {
  43         AuthData.uid = 0;
  44         AuthData.nt = 0;
  45         AuthData.first_auth = true;
  46         AuthData.ks2 = 0;
  47         AuthData.ks3 = 0;
  48 }
  49
  50 /**
  51  * @brief iso14443A_CRC_check Checks CRC in command or response
  52  * @param isResponse
  53  * @param data
  54  * @param len
  55  * @return  0 : CRC-command, CRC not ok
  56  *          1 : CRC-command, CRC ok
  57  *          2 : Not crc-command
  58  */
  59 uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  60 {
  61         uint8_t b1,b2;
  62
  63         if(len <= 2) return 2;
  64
  65         if(isResponse & (len < 6)) return 2;
  66
  67         ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
  68         if (b1 != data[len-2] || b2 != data[len-1]) {
  69                 return 0;
  70         } else {
  71                 return 1;
  72         }
  73 }
  74
  75 uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  76 {
  77         switch(MifareAuthState) {
  78                 case masNone:
  79                 case masError:
  80                         return iso14443A_CRC_check(isResponse, data, len);
  81                 default:
  82                         return 2;
  83         }
  84 }
  85
  86 void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
  87 {
  88         switch(cmd[0])
  89         {
  90         case ISO14443A_CMD_WUPA:
  91                 snprintf(exp,size,"WUPA");
  92                 break;
  93         case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
  94                 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
  95                 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
  96                 if(cmd[1] == 0x70)
  97                 {
  98                         snprintf(exp,size,"SELECT_UID"); break;
  99                 }else
 100                 {
 101                         snprintf(exp,size,"ANTICOLL"); break;
 102                 }
 103         }
 104         case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
 105                 //95 20 = Anticollision of cascade level2
 106                 //95 70 = Select of cascade level2
 107                 if(cmd[2] == 0x70)
 108                 {
 109                         snprintf(exp,size,"SELECT_UID-2"); break;
 110                 }else
 111                 {
 112                         snprintf(exp,size,"ANTICOLL-2"); break;
 113                 }
 114         }
 115         case ISO14443A_CMD_REQA:
 116                 snprintf(exp,size,"REQA");
 117                 break;
 118         case ISO14443A_CMD_READBLOCK:   snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
 119         case ISO14443A_CMD_WRITEBLOCK:  snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
 120         case ISO14443A_CMD_HALT:
 121                 snprintf(exp,size,"HALT");
 122                 MifareAuthState = masNone;
 123                 break;
 124         case ISO14443A_CMD_RATS:                snprintf(exp,size,"RATS"); break;
 125         case MIFARE_CMD_INC:                    snprintf(exp,size,"INC(%d)",cmd[1]); break;
 126         case MIFARE_CMD_DEC:                    snprintf(exp,size,"DEC(%d)",cmd[1]); break;
 127         case MIFARE_CMD_RESTORE:                snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
 128         case MIFARE_CMD_TRANSFER:               snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
 129         case MIFARE_AUTH_KEYA:
 130                 if ( cmdsize > 3) {
 131                         snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
 132                         MifareAuthState = masNt;
 133                 } else {
 134                         //      case MIFARE_ULEV1_VERSION :  both 0x60.
 135                         snprintf(exp,size,"EV1 VERSION");
 136                 }
 137                 break;
 138         case MIFARE_AUTH_KEYB:
 139                 MifareAuthState = masNt;
 140                 snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
 141                 break;
 142         case MIFARE_MAGICWUPC1:                 snprintf(exp,size,"MAGIC WUPC1"); break;
 143         case MIFARE_MAGICWUPC2:                 snprintf(exp,size,"MAGIC WUPC2"); break;
 144         case MIFARE_MAGICWIPEC:                 snprintf(exp,size,"MAGIC WIPEC"); break;
 145         case MIFARE_ULC_AUTH_1:         snprintf(exp,size,"AUTH "); break;
 146         case MIFARE_ULC_AUTH_2:         snprintf(exp,size,"AUTH_ANSW"); break;
 147         case MIFARE_ULEV1_AUTH:
 148                 if ( cmdsize == 7 )
 149                         snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
 150                 else
 151                         snprintf(exp,size,"PWD-AUTH");
 152                 break;
 153         case MIFARE_ULEV1_FASTREAD:{
 154                 if ( cmdsize >=3 && cmd[2] <= 0xE6)
 155                         snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
 156                 else
 157                         snprintf(exp,size,"?");
 158                 break;
 159         }
 160         case MIFARE_ULC_WRITE:{
 161                 if ( cmd[1] < 0x21 )
 162                         snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
 163                 else
 164                         snprintf(exp,size,"?");
 165                 break;
 166         }
 167         case MIFARE_ULEV1_READ_CNT:{
 168                 if ( cmd[1] < 5 )
 169                         snprintf(exp,size,"READ CNT(%d)",cmd[1]);
 170                 else
 171                         snprintf(exp,size,"?");
 172                 break;
 173         }
 174         case MIFARE_ULEV1_INCR_CNT:{
 175                 if ( cmd[1] < 5 )
 176                         snprintf(exp,size,"INCR(%d)",cmd[1]);
 177                 else
 178                         snprintf(exp,size,"?");
 179                 break;
 180         }
 181         case MIFARE_ULEV1_READSIG:              snprintf(exp,size,"READ_SIG"); break;
 182         case MIFARE_ULEV1_CHECKTEAR:    snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
 183         case MIFARE_ULEV1_VCSL:         snprintf(exp,size,"VCSL"); break;
 184         default:                                                snprintf(exp,size,"?"); break;
 185         }
 186         return;
 187 }
 188
 189 void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
 190         if (!isResponse && cmdsize == 1) {
 191                 switch(cmd[0]) {
 192                         case ISO14443A_CMD_WUPA:
 193                         case ISO14443A_CMD_REQA:
 194                                 MifareAuthState = masNone;
 195                                 break;
 196                         default:
 197                                 break;
 198                 }
 199         }
 200
 201         // get UID
 202         if (MifareAuthState == masNone) {
 203                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
 204                         ClearAuthData();
 205                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 206                 }
 207                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
 208                         ClearAuthData();
 209                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 210                 }
 211         }
 212
 213         switch(MifareAuthState) {
 214                 case masNt:
 215                         if (cmdsize == 4 && isResponse) {
 216                                 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
 217                                 MifareAuthState = masNrAr;
 218                                 if (AuthData.first_auth)
 219                                         AuthData.nt = bytes_to_num(cmd, 4);
 220                                 else
 221                                         AuthData.nt_enc = bytes_to_num(cmd, 4);
 222                                         AuthData.nt_enc_par = parity[0];
 223                                 return;
 224                         } else {
 225                                 MifareAuthState = masError;
 226                         }
 227                         break;
 228                 case masNrAr:
 229                         if (cmdsize == 8 && !isResponse) {
 230                                 snprintf(exp,size,"AUTH: nr ar (enc)");
 231                                 MifareAuthState = masAt;
 232                                 AuthData.nr_enc = bytes_to_num(cmd, 4);
 233                                 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
 234                                 AuthData.ar_enc_par = parity[0] << 4;
 235                                 return;
 236                         } else {
 237                                 MifareAuthState = masError;
 238                         }
 239                         break;
 240                 case masAt:
 241                         if (cmdsize == 4 && isResponse) {
 242                                 snprintf(exp,size,"AUTH: at (enc)");
 243                                 MifareAuthState = masAuthComplete;
 244                                 AuthData.at_enc = bytes_to_num(cmd, 4);
 245                                 AuthData.at_enc_par = parity[0];
 246                                 return;
 247                         } else {
 248                                 MifareAuthState = masError;
 249                         }
 250                         break;
 251                 default:
 252                         break;
 253         }
 254
 255         if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
 256                 annotateIso14443a(exp, size, cmd, cmdsize);
 257
 258 }
 259
 260 bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, uint8_t *parity, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
 261         static struct Crypto1State *traceCrypto1;
 262         static uint64_t mfLastKey;
 263
 264         *mfDataLen = 0;
 265
 266         if (MifareAuthState == masAuthComplete) {
 267                 if (traceCrypto1) {
 268                         crypto1_destroy(traceCrypto1);
 269                         traceCrypto1 = NULL;
 270                 }
 271
 272                 MifareAuthState = masFirstData;
 273                 return false;
 274         }
 275
 276         if (cmdsize > 32)
 277                 return false;
 278
 279         if (MifareAuthState == masFirstData) {
 280                 if (AuthData.first_auth) {
 281                         AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
 282                         AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
 283
 284                         mfLastKey = GetCrypto1ProbableKey(&AuthData);
 285                         PrintAndLog("            |          * | key | probable key:%010"PRIx64" Prng:%s   ks2:%08x ks3:%08x |     |",
 286                                 mfLastKey,
 287                                 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
 288                                 AuthData.ks2,
 289                                 AuthData.ks3);
 290
 291                         AuthData.first_auth = false;
 292
 293                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 294                 } else {
 295                         if (traceCrypto1) {
 296                                 crypto1_destroy(traceCrypto1);
 297                                 traceCrypto1 = NULL;
 298                         }
 299
 300                         // check last used key
 301                         if (false && mfLastKey) {
 302                                 if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize, parity)) {
 303                                         PrintAndLog("            |          * | key | last used key:%010"PRIx64"            ks2:%08x ks3:%08x |     |",
 304                                                 mfLastKey,
 305                                                 AuthData.ks2,
 306                                                 AuthData.ks3);
 307
 308                                 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 309                                 };
 310                         }
 311
 312                         // check default keys
 313                         if (false && !traceCrypto1) {
 314                                 for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
 315                                         if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize, parity)) {
 316                                                 PrintAndLog("            |          * | key | default key:%010"PRIx64"              ks2:%08x ks3:%08x |     |",
 317                                                         MifareDefaultKeys[defaultKeyCounter],
 318                                                         AuthData.ks2,
 319                                                         AuthData.ks3);
 320
 321                                                 mfLastKey = MifareDefaultKeys[defaultKeyCounter];
 322                                                 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 323                                                 break;
 324                                         };
 325                                 }
 326                         }
 327
 328                         // nested
 329                         if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
 330                                 uint32_t ntx = prng_successor(AuthData.nt, 90);
 331                                 for (int i = 0; i < 16383; i++) {
 332                                         ntx = prng_successor(ntx, 1);
 333                                         if (NTParityChk(&AuthData, ntx)){
 334
 335                                                 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
 336                                                 uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
 337                                                 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
 338                                                 memcpy(mfData, cmd, cmdsize);
 339                                                 mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
 340
 341                                                 crypto1_destroy(pcs);
 342                                                 if (CheckCrypto1Parity(cmd, cmdsize, mfData, parity) && CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
 343                                                         AuthData.ks2 = ks2;
 344                                                         AuthData.ks3 = ks3;
 345
 346                                                         AuthData.nt = ntx;
 347                                                         mfLastKey = GetCrypto1ProbableKey(&AuthData);
 348                                                         PrintAndLog("            |          * | key | nested probable key:%010"PRIx64"      ks2:%08x ks3:%08x |     |",
 349                                                                 mfLastKey,
 350                                                                 AuthData.ks2,
 351                                                                 AuthData.ks3);
 352
 353                                                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 354                                                         break;
 355                                                 }
 356                                         }
 357                                 }
 358                         }
 359
 360                         //hardnested
 361                         if (!traceCrypto1) {
 362                                 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);
 363                         }
 364                 }
 365
 366
 367
 368                 MifareAuthState = masData;
 369         }
 370
 371         if (MifareAuthState == masData && traceCrypto1) {
 372                 memcpy(mfData, cmd, cmdsize);
 373                 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
 374                 *mfDataLen = cmdsize;
 375         }
 376
 377         return *mfDataLen > 0;
 378 }
 379
 380 bool NTParityChk(TAuthData *ad, uint32_t ntx) {
 381         if (
 382                 (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
 383                 (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
 384                 (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
 385                 )
 386                 return false;
 387
 388         uint32_t ar = prng_successor(ntx, 64);
 389         if (
 390                 (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
 391                 (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
 392                 (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
 393                 )
 394                 return false;
 395
 396         uint32_t at = prng_successor(ntx, 96);
 397         if (
 398                 (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
 399                 (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
 400                 (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
 401                 (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
 402                 )
 403                 return false;
 404
 405         return true;
 406 }
 407
 408 bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize, uint8_t *parity) {
 409         uint8_t buf[32] = {0};
 410         struct Crypto1State *pcs;
 411
 412         AuthData.ks2 = 0;
 413         AuthData.ks3 = 0;
 414
 415         pcs = crypto1_create(key);
 416         uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
 417         uint32_t ar = prng_successor(nt1, 64);
 418         uint32_t at = prng_successor(nt1, 96);
 419
 420         crypto1_word(pcs, ad->nr_enc, 1);
 421 //      uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;  // if needs deciphered nr
 422         uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
 423         uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
 424
 425         if (!(ar == ar1 && at == at1 && NTParityChk(ad, nt1)))
 426                 return false;
 427
 428         memcpy(buf, cmd, cmdsize);
 429         mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
 430
 431         crypto1_destroy(pcs);
 432
 433         if (!CheckCrypto1Parity(cmd, cmdsize, buf, parity))
 434                 return false;
 435
 436         if(!CheckCrc14443(CRC_14443_A, buf, cmdsize))
 437                 return false;
 438
 439         AuthData.nt = nt1;
 440         AuthData.ks2 = AuthData.ar_enc ^ ar;
 441         AuthData.ks3 = AuthData.at_enc ^ at;
 442
 443         return true;
 444 }
 445
 446 bool CheckCrypto1Parity(uint8_t *cmd_enc, uint8_t cmdsize, uint8_t *cmd, uint8_t *parity_enc) {
 447         for (int i = 0; i < cmdsize - 1; i++) {
 448                 if (oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (7 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01))
 449                         return false;
 450         }
 451
 452         return true;
 453 }
 454
 455 uint64_t GetCrypto1ProbableKey(TAuthData *ad) {
 456         struct Crypto1State *revstate = lfsr_recovery64(ad->ks2, ad->ks3);
 457         lfsr_rollback_word(revstate, 0, 0);
 458         lfsr_rollback_word(revstate, 0, 0);
 459         lfsr_rollback_word(revstate, ad->nr_enc, 1);
 460         lfsr_rollback_word(revstate, ad->uid ^ ad->nt, 0);
 461
 462         uint64_t lfsr = 0;
 463         crypto1_get_lfsr(revstate, &lfsr);
 464         crypto1_destroy(revstate);
 465
 466         return lfsr;
 467 }