git.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         masFirstData,
  34         masData,
  35         masDataNested,
  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 masFirstData:
  77                 case masData:
  78                 case masDataNested:
  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 = masFirstData;
 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)
 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         *mfDataLen = 0;
 253
 254         if (cmdsize > 32)
 255                 return false;
 256
 257         if (MifareAuthState == masFirstData) {
 258                 if (AuthData.first_auth) {
 259                         uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
 260                         uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
 261                         struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
 262                         lfsr_rollback_word(revstate, 0, 0);
 263                         lfsr_rollback_word(revstate, 0, 0);
 264                         lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
 265                         lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
 266
 267                         uint64_t lfsr = 0;
 268                         crypto1_get_lfsr(revstate, &lfsr);
 269                         crypto1_destroy(revstate);
 270 //                      LastKey = lfsr;
 271                         PrintAndLog("            |          * | key | probable key:%x%x Prng:%s   ks2:%08x ks3:%08x |     |",
 272                                 (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
 273                                 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
 274                                 ks2,
 275                                 ks3);
 276
 277                         AuthData.first_auth = false;
 278                 } else {
 279                         printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
 280                 }
 281
 282
 283
 284                 MifareAuthState = masData;
 285                 return true;
 286         }
 287
 288         if (MifareAuthState == masData) {
 289         }
 290
 291         return *mfDataLen > 0;
 292 }
 293