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 }
  47
  48 /**
  49  * @brief iso14443A_CRC_check Checks CRC in command or response
  50  * @param isResponse
  51  * @param data
  52  * @param len
  53  * @return  0 : CRC-command, CRC not ok
  54  *          1 : CRC-command, CRC ok
  55  *          2 : Not crc-command
  56  */
  57 uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  58 {
  59         uint8_t b1,b2;
  60
  61         if(len <= 2) return 2;
  62
  63         if(isResponse & (len < 6)) return 2;
  64
  65         ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
  66         if (b1 != data[len-2] || b2 != data[len-1]) {
  67                 return 0;
  68         } else {
  69                 return 1;
  70         }
  71 }
  72
  73 uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  74 {
  75         switch(MifareAuthState) {
  76                 case masNone:
  77                 case masError:
  78                         return iso14443A_CRC_check(isResponse, data, len);
  79                 default:
  80                         return 2;
  81         }
  82 }
  83
  84 void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
  85 {
  86         switch(cmd[0])
  87         {
  88         case ISO14443A_CMD_WUPA:
  89                 snprintf(exp,size,"WUPA");
  90                 MifareAuthState = masNone;
  91                 break;
  92         case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
  93                 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
  94                 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
  95                 if(cmd[1] == 0x70)
  96                 {
  97                         snprintf(exp,size,"SELECT_UID"); break;
  98                 }else
  99                 {
 100                         snprintf(exp,size,"ANTICOLL"); break;
 101                 }
 102         }
 103         case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
 104                 //95 20 = Anticollision of cascade level2
 105                 //95 70 = Select of cascade level2
 106                 if(cmd[2] == 0x70)
 107                 {
 108                         snprintf(exp,size,"SELECT_UID-2"); break;
 109                 }else
 110                 {
 111                         snprintf(exp,size,"ANTICOLL-2"); break;
 112                 }
 113         }
 114         case ISO14443A_CMD_REQA:
 115                 snprintf(exp,size,"REQA");
 116                 MifareAuthState = masNone;
 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         // get UID
 191         if (MifareAuthState == masNone) {
 192                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
 193                         ClearAuthData();
 194                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 195                 }
 196                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
 197                         ClearAuthData();
 198                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 199                 }
 200         }
 201
 202         switch(MifareAuthState) {
 203                 case masNt:
 204                         if (cmdsize == 4 && isResponse) {
 205                                 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
 206                                 MifareAuthState = masNrAr;
 207                                 if (AuthData.first_auth)
 208                                         AuthData.nt = bytes_to_num(cmd, 4);
 209                                 else
 210                                         AuthData.nt_enc = bytes_to_num(cmd, 4);
 211                                         AuthData.nt_enc_par = parity[0];
 212                                 return;
 213                         } else {
 214                                 MifareAuthState = masError;
 215                         }
 216                         break;
 217                 case masNrAr:
 218                         if (cmdsize == 8 && !isResponse) {
 219                                 snprintf(exp,size,"AUTH: nr ar (enc)");
 220                                 MifareAuthState = masAt;
 221                                 AuthData.nr_enc = bytes_to_num(cmd, 4);
 222                                 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
 223                                 AuthData.ar_enc_par = parity[0] << 4;
 224                                 return;
 225                         } else {
 226                                 MifareAuthState = masError;
 227                         }
 228                         break;
 229                 case masAt:
 230                         if (cmdsize == 4 && isResponse) {
 231                                 snprintf(exp,size,"AUTH: at (enc)");
 232                                 MifareAuthState = masAuthComplete;
 233                                 AuthData.at_enc = bytes_to_num(cmd, 4);
 234                                 AuthData.at_enc_par = parity[0];
 235                                 return;
 236                         } else {
 237                                 MifareAuthState = masError;
 238                         }
 239                         break;
 240                 default:
 241                         break;
 242         }
 243
 244         if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
 245                 annotateIso14443a(exp, size, cmd, cmdsize);
 246
 247 }
 248
 249 bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
 250         static struct Crypto1State *traceCrypto1;
 251         static uint64_t mfLastKey;
 252
 253         *mfDataLen = 0;
 254
 255         if (MifareAuthState == masAuthComplete) {
 256                 if (traceCrypto1) {
 257                         crypto1_destroy(traceCrypto1);
 258                 }
 259
 260                 MifareAuthState = masFirstData;
 261                 return false;
 262         }
 263
 264         if (cmdsize > 32)
 265                 return false;
 266
 267         if (MifareAuthState == masFirstData) {
 268                 if (AuthData.first_auth) {
 269                         uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
 270                         uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
 271                         struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
 272                         lfsr_rollback_word(revstate, 0, 0);
 273                         lfsr_rollback_word(revstate, 0, 0);
 274                         lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
 275                         lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
 276
 277                         uint64_t lfsr = 0;
 278                         crypto1_get_lfsr(revstate, &lfsr);
 279                         crypto1_destroy(revstate);
 280                         mfLastKey = lfsr;
 281                         PrintAndLog("            |          * | key | probable key:%x%x Prng:%s   ks2:%08x ks3:%08x |     |",
 282                                 (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
 283                                 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
 284                                 ks2,
 285                                 ks3);
 286
 287                         AuthData.first_auth = false;
 288
 289                         traceCrypto1 = lfsr_recovery64(ks2, ks3);
 290                 } else {
 291                         printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
 292
 293                         // check last used key
 294                         if (mfLastKey) {
 295                                 if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize)) {
 296                                 };
 297                         }
 298
 299                         // check default keys
 300                         if (!traceCrypto1) {
 301                                 for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
 302                                         if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) {
 303
 304                                                 break;
 305                                         };
 306                                 }
 307                         }
 308
 309                         // nested
 310                         if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
 311                                 uint32_t ntx = prng_successor(AuthData.nt, 90);
 312                                 for (int i = 0; i < 16383; i++) {
 313                                         ntx = prng_successor(ntx, 1);
 314                                         if (NTParityChk(&AuthData, ntx)){
 315
 316                                                 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
 317                                                 uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
 318                                                 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
 319                                                 memcpy(mfData, cmd, cmdsize);
 320                                                 mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
 321
 322                                                 crypto1_destroy(pcs);
 323                                                 if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
 324                                                         traceCrypto1 = lfsr_recovery64(ks2, ks3);
 325                                                         break;
 326                                                 }
 327                                         }
 328                                 }
 329                                 if (traceCrypto1)
 330                                         printf("key> nt=%08x nonce distance=%d \n", ntx, nonce_distance(AuthData.nt, ntx));
 331                                 else
 332                                         printf("key> don't have any valid nt( \n");
 333                         }
 334
 335                         //hardnested
 336                         if (!traceCrypto1) {
 337                         }
 338                 }
 339
 340
 341
 342                 MifareAuthState = masData;
 343         }
 344
 345         if (MifareAuthState == masData && traceCrypto1) {
 346                 memcpy(mfData, cmd, cmdsize);
 347                 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
 348                 *mfDataLen = cmdsize;
 349         }
 350
 351         return *mfDataLen > 0;
 352 }
 353
 354 bool NTParityChk(TAuthData *ad, uint32_t ntx) {
 355         if (
 356                 (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
 357                 (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
 358                 (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
 359                 )
 360                 return false;
 361
 362         uint32_t ar = prng_successor(ntx, 64);
 363         if (
 364                 (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
 365                 (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
 366                 (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
 367                 )
 368                 return false;
 369
 370         uint32_t at = prng_successor(ntx, 96);
 371         if (
 372                 (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
 373                 (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
 374                 (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
 375                 (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
 376                 )
 377                 return false;
 378
 379         return true;
 380 }
 381
 382 bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize) {
 383         uint8_t buf[32] = {0};
 384         struct Crypto1State *pcs;
 385
 386         pcs = crypto1_create(key);
 387         uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
 388         uint32_t ar = prng_successor(nt1, 64);
 389         uint32_t at = prng_successor(nt1, 96);
 390         printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", ad->uid, nt1, printBitsPar(&ad->nt_enc_par, 4), ar, at);
 391         uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;
 392         uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
 393         uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
 394         printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);
 395
 396         if (NTParityChk(ad, nt1))
 397                 printf("key> the same key test OK. key=%x%x\n", (unsigned int)((key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(key & 0xFFFFFFFF));
 398         else {
 399                 printf("key> the same key test. check nt parity error.\n");
 400                 return false;
 401         }
 402
 403         memcpy(buf, cmd, cmdsize);
 404         mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
 405
 406         crypto1_destroy(pcs);
 407
 408         return CheckCrc14443(CRC_14443_A, buf, cmdsize);
 409 }