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                 MifareAuthState = masNone;
  93                 break;
  94         case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
  95                 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
  96                 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
  97                 if(cmd[1] == 0x70)
  98                 {
  99                         snprintf(exp,size,"SELECT_UID"); break;
 100                 }else
 101                 {
 102                         snprintf(exp,size,"ANTICOLL"); break;
 103                 }
 104         }
 105         case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
 106                 //95 20 = Anticollision of cascade level2
 107                 //95 70 = Select of cascade level2
 108                 if(cmd[2] == 0x70)
 109                 {
 110                         snprintf(exp,size,"SELECT_UID-2"); break;
 111                 }else
 112                 {
 113                         snprintf(exp,size,"ANTICOLL-2"); break;
 114                 }
 115         }
 116         case ISO14443A_CMD_REQA:
 117                 snprintf(exp,size,"REQA");
 118                 MifareAuthState = masNone;
 119                 break;
 120         case ISO14443A_CMD_READBLOCK:   snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
 121         case ISO14443A_CMD_WRITEBLOCK:  snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
 122         case ISO14443A_CMD_HALT:
 123                 snprintf(exp,size,"HALT");
 124                 MifareAuthState = masNone;
 125                 break;
 126         case ISO14443A_CMD_RATS:                snprintf(exp,size,"RATS"); break;
 127         case MIFARE_CMD_INC:                    snprintf(exp,size,"INC(%d)",cmd[1]); break;
 128         case MIFARE_CMD_DEC:                    snprintf(exp,size,"DEC(%d)",cmd[1]); break;
 129         case MIFARE_CMD_RESTORE:                snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
 130         case MIFARE_CMD_TRANSFER:               snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
 131         case MIFARE_AUTH_KEYA:
 132                 if ( cmdsize > 3) {
 133                         snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
 134                         MifareAuthState = masNt;
 135                 } else {
 136                         //      case MIFARE_ULEV1_VERSION :  both 0x60.
 137                         snprintf(exp,size,"EV1 VERSION");
 138                 }
 139                 break;
 140         case MIFARE_AUTH_KEYB:
 141                 MifareAuthState = masNt;
 142                 snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
 143                 break;
 144         case MIFARE_MAGICWUPC1:                 snprintf(exp,size,"MAGIC WUPC1"); break;
 145         case MIFARE_MAGICWUPC2:                 snprintf(exp,size,"MAGIC WUPC2"); break;
 146         case MIFARE_MAGICWIPEC:                 snprintf(exp,size,"MAGIC WIPEC"); break;
 147         case MIFARE_ULC_AUTH_1:         snprintf(exp,size,"AUTH "); break;
 148         case MIFARE_ULC_AUTH_2:         snprintf(exp,size,"AUTH_ANSW"); break;
 149         case MIFARE_ULEV1_AUTH:
 150                 if ( cmdsize == 7 )
 151                         snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
 152                 else
 153                         snprintf(exp,size,"PWD-AUTH");
 154                 break;
 155         case MIFARE_ULEV1_FASTREAD:{
 156                 if ( cmdsize >=3 && cmd[2] <= 0xE6)
 157                         snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
 158                 else
 159                         snprintf(exp,size,"?");
 160                 break;
 161         }
 162         case MIFARE_ULC_WRITE:{
 163                 if ( cmd[1] < 0x21 )
 164                         snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
 165                 else
 166                         snprintf(exp,size,"?");
 167                 break;
 168         }
 169         case MIFARE_ULEV1_READ_CNT:{
 170                 if ( cmd[1] < 5 )
 171                         snprintf(exp,size,"READ CNT(%d)",cmd[1]);
 172                 else
 173                         snprintf(exp,size,"?");
 174                 break;
 175         }
 176         case MIFARE_ULEV1_INCR_CNT:{
 177                 if ( cmd[1] < 5 )
 178                         snprintf(exp,size,"INCR(%d)",cmd[1]);
 179                 else
 180                         snprintf(exp,size,"?");
 181                 break;
 182         }
 183         case MIFARE_ULEV1_READSIG:              snprintf(exp,size,"READ_SIG"); break;
 184         case MIFARE_ULEV1_CHECKTEAR:    snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
 185         case MIFARE_ULEV1_VCSL:         snprintf(exp,size,"VCSL"); break;
 186         default:                                                snprintf(exp,size,"?"); break;
 187         }
 188         return;
 189 }
 190
 191 void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
 192         // get UID
 193         if (MifareAuthState == masNone) {
 194                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
 195                         ClearAuthData();
 196                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 197                 }
 198                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
 199                         ClearAuthData();
 200                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 201                 }
 202         }
 203
 204         switch(MifareAuthState) {
 205                 case masNt:
 206                         if (cmdsize == 4 && isResponse) {
 207                                 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
 208                                 MifareAuthState = masNrAr;
 209                                 if (AuthData.first_auth)
 210                                         AuthData.nt = bytes_to_num(cmd, 4);
 211                                 else
 212                                         AuthData.nt_enc = bytes_to_num(cmd, 4);
 213                                         AuthData.nt_enc_par = parity[0];
 214                                 return;
 215                         } else {
 216                                 MifareAuthState = masError;
 217                         }
 218                         break;
 219                 case masNrAr:
 220                         if (cmdsize == 8 && !isResponse) {
 221                                 snprintf(exp,size,"AUTH: nr ar (enc)");
 222                                 MifareAuthState = masAt;
 223                                 AuthData.nr_enc = bytes_to_num(cmd, 4);
 224                                 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
 225                                 AuthData.ar_enc_par = parity[0] << 4;
 226                                 return;
 227                         } else {
 228                                 MifareAuthState = masError;
 229                         }
 230                         break;
 231                 case masAt:
 232                         if (cmdsize == 4 && isResponse) {
 233                                 snprintf(exp,size,"AUTH: at (enc)");
 234                                 MifareAuthState = masAuthComplete;
 235                                 AuthData.at_enc = bytes_to_num(cmd, 4);
 236                                 AuthData.at_enc_par = parity[0];
 237                                 return;
 238                         } else {
 239                                 MifareAuthState = masError;
 240                         }
 241                         break;
 242                 default:
 243                         break;
 244         }
 245
 246         if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
 247                 annotateIso14443a(exp, size, cmd, cmdsize);
 248
 249 }
 250
 251 bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
 252         static struct Crypto1State *traceCrypto1;
 253         static uint64_t mfLastKey;
 254
 255         *mfDataLen = 0;
 256
 257         if (MifareAuthState == masAuthComplete) {
 258                 if (traceCrypto1) {
 259                         crypto1_destroy(traceCrypto1);
 260                 }
 261
 262                 MifareAuthState = masFirstData;
 263                 return false;
 264         }
 265
 266         if (cmdsize > 32)
 267                 return false;
 268
 269         if (MifareAuthState == masFirstData) {
 270                 if (AuthData.first_auth) {
 271                         AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
 272                         AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
 273                         struct Crypto1State *revstate = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 274                         lfsr_rollback_word(revstate, 0, 0);
 275                         lfsr_rollback_word(revstate, 0, 0);
 276                         lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
 277                         lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
 278
 279                         uint64_t lfsr = 0;
 280                         crypto1_get_lfsr(revstate, &lfsr);
 281                         crypto1_destroy(revstate);
 282                         mfLastKey = lfsr;
 283                         PrintAndLog("            |          * | key | probable key:%x%x Prng:%s   ks2:%08x ks3:%08x |     |",
 284                                 (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
 285                                 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
 286                                 AuthData.ks2,
 287                                 AuthData.ks3);
 288
 289                         AuthData.first_auth = false;
 290
 291                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 292                 } else {
 293                         printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
 294
 295                         // check last used key
 296                         if (mfLastKey) {
 297                                 if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize)) {
 298                                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 299                                 };
 300                         }
 301
 302                         // check default keys
 303                         if (!traceCrypto1) {
 304                                 for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
 305                                         if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) {
 306                                                 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 307                                                 break;
 308                                         };
 309                                 }
 310                         }
 311
 312                         // nested
 313                         if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
 314                                 uint32_t ntx = prng_successor(AuthData.nt, 90);
 315                                 for (int i = 0; i < 16383; i++) {
 316                                         ntx = prng_successor(ntx, 1);
 317                                         if (NTParityChk(&AuthData, ntx)){
 318
 319                                                 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
 320                                                 uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
 321                                                 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
 322                                                 memcpy(mfData, cmd, cmdsize);
 323                                                 mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
 324
 325                                                 crypto1_destroy(pcs);
 326                                                 if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
 327                                                         AuthData.ks2 = ks2;
 328                                                         AuthData.ks3 = ks3;
 329                                                         traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
 330                                                         break;
 331                                                 }
 332                                         }
 333                                 }
 334                                 if (traceCrypto1)
 335                                         printf("key> nt=%08x nonce distance=%d \n", ntx, nonce_distance(AuthData.nt, ntx));
 336                                 else
 337                                         printf("key> don't have any valid nt( \n");
 338                         }
 339
 340                         //hardnested
 341                         if (!traceCrypto1) {
 342                         }
 343                 }
 344
 345
 346
 347                 MifareAuthState = masData;
 348         }
 349
 350         if (MifareAuthState == masData && traceCrypto1) {
 351                 memcpy(mfData, cmd, cmdsize);
 352                 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
 353                 *mfDataLen = cmdsize;
 354         }
 355
 356         return *mfDataLen > 0;
 357 }
 358
 359 bool NTParityChk(TAuthData *ad, uint32_t ntx) {
 360         if (
 361                 (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
 362                 (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
 363                 (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
 364                 )
 365                 return false;
 366
 367         uint32_t ar = prng_successor(ntx, 64);
 368         if (
 369                 (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
 370                 (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
 371                 (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
 372                 )
 373                 return false;
 374
 375         uint32_t at = prng_successor(ntx, 96);
 376         if (
 377                 (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
 378                 (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
 379                 (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
 380                 (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
 381                 )
 382                 return false;
 383
 384         return true;
 385 }
 386
 387 bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize) {
 388         uint8_t buf[32] = {0};
 389         struct Crypto1State *pcs;
 390
 391         pcs = crypto1_create(key);
 392         uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
 393         uint32_t ar = prng_successor(nt1, 64);
 394         uint32_t at = prng_successor(nt1, 96);
 395         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);
 396         uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;
 397         uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
 398         uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
 399         printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);
 400
 401         if (NTParityChk(ad, nt1))
 402                 printf("key> the same key test OK. key=%x%x\n", (unsigned int)((key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(key & 0xFFFFFFFF));
 403         else {
 404                 printf("key> the same key test. check nt parity error.\n");
 405                 return false;
 406         }
 407
 408         memcpy(buf, cmd, cmdsize);
 409         mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
 410
 411         crypto1_destroy(pcs);
 412
 413         if(CheckCrc14443(CRC_14443_A, buf, cmdsize)) {
 414                 AuthData.ks2 = AuthData.ar_enc ^ ar;
 415                 AuthData.ks3 = AuthData.at_enc ^ at;
 416                 return true;
 417         } else {
 418                 return false;
 419         }
 420 }