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
  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 }
  46
  47 /**
  48  * @brief iso14443A_CRC_check Checks CRC in command or response
  49  * @param isResponse
  50  * @param data
  51  * @param len
  52  * @return  0 : CRC-command, CRC not ok
  53  *          1 : CRC-command, CRC ok
  54  *          2 : Not crc-command
  55  */
  56 uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  57 {
  58         uint8_t b1,b2;
  59
  60         if(len <= 2) return 2;
  61
  62         if(isResponse & (len < 6)) return 2;
  63
  64         ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
  65         if (b1 != data[len-2] || b2 != data[len-1]) {
  66                 return 0;
  67         } else {
  68                 return 1;
  69         }
  70 }
  71
  72 uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
  73 {
  74         switch(MifareAuthState) {
  75                 case masNone:
  76                 case masError:
  77                         return iso14443A_CRC_check(isResponse, data, len);
  78                 default:
  79                         return 2;
  80         }
  81 }
  82
  83 void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
  84 {
  85         switch(cmd[0])
  86         {
  87         case ISO14443A_CMD_WUPA:
  88                 snprintf(exp,size,"WUPA");
  89                 MifareAuthState = masNone;
  90                 break;
  91         case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
  92                 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
  93                 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
  94                 if(cmd[1] == 0x70)
  95                 {
  96                         snprintf(exp,size,"SELECT_UID"); break;
  97                 }else
  98                 {
  99                         snprintf(exp,size,"ANTICOLL"); break;
 100                 }
 101         }
 102         case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
 103                 //95 20 = Anticollision of cascade level2
 104                 //95 70 = Select of cascade level2
 105                 if(cmd[2] == 0x70)
 106                 {
 107                         snprintf(exp,size,"SELECT_UID-2"); break;
 108                 }else
 109                 {
 110                         snprintf(exp,size,"ANTICOLL-2"); break;
 111                 }
 112         }
 113         case ISO14443A_CMD_REQA:
 114                 snprintf(exp,size,"REQA");
 115                 MifareAuthState = masNone;
 116                 break;
 117         case ISO14443A_CMD_READBLOCK:   snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
 118         case ISO14443A_CMD_WRITEBLOCK:  snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
 119         case ISO14443A_CMD_HALT:
 120                 snprintf(exp,size,"HALT");
 121                 MifareAuthState = masNone;
 122                 break;
 123         case ISO14443A_CMD_RATS:                snprintf(exp,size,"RATS"); break;
 124         case MIFARE_CMD_INC:                    snprintf(exp,size,"INC(%d)",cmd[1]); break;
 125         case MIFARE_CMD_DEC:                    snprintf(exp,size,"DEC(%d)",cmd[1]); break;
 126         case MIFARE_CMD_RESTORE:                snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
 127         case MIFARE_CMD_TRANSFER:               snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
 128         case MIFARE_AUTH_KEYA:
 129                 if ( cmdsize > 3) {
 130                         snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
 131                         MifareAuthState = masNt;
 132                 } else {
 133                         //      case MIFARE_ULEV1_VERSION :  both 0x60.
 134                         snprintf(exp,size,"EV1 VERSION");
 135                 }
 136                 break;
 137         case MIFARE_AUTH_KEYB:
 138                 MifareAuthState = masNt;
 139                 snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
 140                 break;
 141         case MIFARE_MAGICWUPC1:                 snprintf(exp,size,"MAGIC WUPC1"); break;
 142         case MIFARE_MAGICWUPC2:                 snprintf(exp,size,"MAGIC WUPC2"); break;
 143         case MIFARE_MAGICWIPEC:                 snprintf(exp,size,"MAGIC WIPEC"); break;
 144         case MIFARE_ULC_AUTH_1:         snprintf(exp,size,"AUTH "); break;
 145         case MIFARE_ULC_AUTH_2:         snprintf(exp,size,"AUTH_ANSW"); break;
 146         case MIFARE_ULEV1_AUTH:
 147                 if ( cmdsize == 7 )
 148                         snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
 149                 else
 150                         snprintf(exp,size,"PWD-AUTH");
 151                 break;
 152         case MIFARE_ULEV1_FASTREAD:{
 153                 if ( cmdsize >=3 && cmd[2] <= 0xE6)
 154                         snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
 155                 else
 156                         snprintf(exp,size,"?");
 157                 break;
 158         }
 159         case MIFARE_ULC_WRITE:{
 160                 if ( cmd[1] < 0x21 )
 161                         snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
 162                 else
 163                         snprintf(exp,size,"?");
 164                 break;
 165         }
 166         case MIFARE_ULEV1_READ_CNT:{
 167                 if ( cmd[1] < 5 )
 168                         snprintf(exp,size,"READ CNT(%d)",cmd[1]);
 169                 else
 170                         snprintf(exp,size,"?");
 171                 break;
 172         }
 173         case MIFARE_ULEV1_INCR_CNT:{
 174                 if ( cmd[1] < 5 )
 175                         snprintf(exp,size,"INCR(%d)",cmd[1]);
 176                 else
 177                         snprintf(exp,size,"?");
 178                 break;
 179         }
 180         case MIFARE_ULEV1_READSIG:              snprintf(exp,size,"READ_SIG"); break;
 181         case MIFARE_ULEV1_CHECKTEAR:    snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
 182         case MIFARE_ULEV1_VCSL:         snprintf(exp,size,"VCSL"); break;
 183         default:                                                snprintf(exp,size,"?"); break;
 184         }
 185         return;
 186 }
 187
 188 void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
 189         // get UID
 190         if (MifareAuthState == masNone) {
 191                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
 192                         ClearAuthData();
 193                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 194                 }
 195                 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
 196                         ClearAuthData();
 197                         AuthData.uid = bytes_to_num(&cmd[2], 4);
 198                 }
 199         }
 200
 201         switch(MifareAuthState) {
 202                 case masNt:
 203                         if (cmdsize == 4 && isResponse) {
 204                                 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
 205                                 MifareAuthState = masNrAr;
 206                                 if (AuthData.first_auth)
 207                                         AuthData.nt = bytes_to_num(cmd, 4);
 208                                 else
 209                                         AuthData.nt_enc = bytes_to_num(cmd, 4);
 210                                         AuthData.nt_enc_par = parity[0];
 211                                 return;
 212                         } else {
 213                                 MifareAuthState = masError;
 214                         }
 215                         break;
 216                 case masNrAr:
 217                         if (cmdsize == 8 && !isResponse) {
 218                                 snprintf(exp,size,"AUTH: nr ar (enc)");
 219                                 MifareAuthState = masAt;
 220                                 AuthData.nr_enc = bytes_to_num(cmd, 4);
 221                                 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
 222                                 AuthData.ar_enc_par = parity[0] << 4;
 223                                 return;
 224                         } else {
 225                                 MifareAuthState = masError;
 226                         }
 227                         break;
 228                 case masAt:
 229                         if (cmdsize == 4 && isResponse) {
 230                                 snprintf(exp,size,"AUTH: at (enc)");
 231                                 MifareAuthState = masAuthComplete;
 232                                 AuthData.at_enc = bytes_to_num(cmd, 4);
 233                                 AuthData.at_enc_par = parity[0];
 234                                 return;
 235                         } else {
 236                                 MifareAuthState = masError;
 237                         }
 238                         break;
 239                 default:
 240                         break;
 241         }
 242
 243         if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
 244                 annotateIso14443a(exp, size, cmd, cmdsize);
 245
 246 }
 247
 248 bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
 249         static struct Crypto1State *traceCrypto1;
 250         uint64_t mfLastKey;
 251
 252         *mfDataLen = 0;
 253
 254         if (MifareAuthState == masAuthComplete) {
 255                 if (traceCrypto1) {
 256                         crypto1_destroy(traceCrypto1);
 257                 }
 258
 259                 MifareAuthState = masFirstData;
 260                 return false;
 261         }
 262
 263         if (cmdsize > 32)
 264                 return false;
 265
 266         if (MifareAuthState == masFirstData) {
 267                 if (AuthData.first_auth) {
 268                         uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
 269                         uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
 270                         struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
 271                         lfsr_rollback_word(revstate, 0, 0);
 272                         lfsr_rollback_word(revstate, 0, 0);
 273                         lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
 274                         lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
 275
 276                         uint64_t lfsr = 0;
 277                         crypto1_get_lfsr(revstate, &lfsr);
 278                         crypto1_destroy(revstate);
 279                         mfLastKey = lfsr;
 280                         PrintAndLog("            |          * | key | probable key:%x%x Prng:%s   ks2:%08x ks3:%08x |     |",
 281                                 (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
 282                                 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
 283                                 ks2,
 284                                 ks3);
 285
 286                         AuthData.first_auth = false;
 287
 288                         traceCrypto1 = lfsr_recovery64(ks2, ks3);
 289                 } else {
 290                         printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
 291
 292                         // check last used key
 293                         if (mfLastKey) {
 294
 295                         }
 296
 297                         // check default keys
 298
 299                         // nested
 300                         if (validate_prng_nonce(AuthData.nt)) {
 301                         }
 302
 303                         //hardnested
 304                 }
 305
 306
 307
 308                 MifareAuthState = masData;
 309         }
 310
 311         if (MifareAuthState == masData && traceCrypto1) {
 312                 memcpy(mfData, cmd, cmdsize);
 313                 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
 314                 *mfDataLen = cmdsize;
 315         }
 316
 317         return *mfDataLen > 0;
 318 }
 319