git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdhficlass.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>, Hagen Fritsch
   3 // Copyright (C) 2011 Gerhard de Koning Gans
   4 // Copyright (C) 2014 Midnitesnake & Andy Davies
   5 //
   6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   7 // at your option, any later version. See the LICENSE.txt file for the text of
   8 // the license.
   9 //-----------------------------------------------------------------------------
  10 // High frequency iClass commands
  11 //-----------------------------------------------------------------------------
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
  17 #include "data.h"
  18 //#include "proxusb.h"
  19 #include "proxmark3.h"
  20 #include "ui.h"
  21 #include "cmdparser.h"
  22 #include "cmdhficlass.h"
  23 #include "common.h"
  24 #include "util.h"
  25 #include "loclass/des.h"
  26 #include "loclass/cipherutils.h"
  27 #include "loclass/cipher.h"
  28 #include "loclass/ikeys.h"
  29
  30 static int CmdHelp(const char *Cmd);
  31
  32 int CmdHFiClassList(const char *Cmd)
  33 {
  34   uint8_t got[1920];
  35   GetFromBigBuf(got,sizeof(got),0);
  36
  37   PrintAndLog("recorded activity:");
  38   PrintAndLog(" ETU     :rssi: who bytes");
  39   PrintAndLog("---------+----+----+-----------");
  40
  41   int i = 0;
  42   int prev = -1;
  43
  44   for (;;) {
  45     if(i >= 1900) {
  46       break;
  47     }
  48
  49     bool isResponse;
  50     int timestamp = *((uint32_t *)(got+i));
  51     if (timestamp & 0x80000000) {
  52       timestamp &= 0x7fffffff;
  53       isResponse = 1;
  54     } else {
  55       isResponse = 0;
  56     }
  57
  58     int metric = 0;
  59     int parityBits = *((uint32_t *)(got+i+4));
  60     // 4 bytes of additional information...
  61     // maximum of 32 additional parity bit information
  62     //
  63     // TODO:
  64     // at each quarter bit period we can send power level (16 levels)
  65     // or each half bit period in 256 levels.
  66
  67
  68     int len = got[i+8];
  69
  70     if (len > 100) {
  71       break;
  72     }
  73     if (i + len >= 1900) {
  74       break;
  75     }
  76
  77     uint8_t *frame = (got+i+9);
  78
  79     // Break and stick with current result if buffer was not completely full
  80     if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
  81
  82     char line[1000] = "";
  83     int j;
  84     for (j = 0; j < len; j++) {
  85       int oddparity = 0x01;
  86       int k;
  87
  88       for (k=0;k<8;k++) {
  89         oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
  90       }
  91
  92       //if((parityBits >> (len - j - 1)) & 0x01) {
  93       if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
  94         sprintf(line+(j*4), "%02x!  ", frame[j]);
  95       }
  96       else {
  97         sprintf(line+(j*4), "%02x   ", frame[j]);
  98       }
  99     }
 100
 101     char *crc;
 102     crc = "";
 103     if (len > 2) {
 104       uint8_t b1, b2;
 105       for (j = 0; j < (len - 1); j++) {
 106         // gives problems... search for the reason..
 107         /*if(frame[j] == 0xAA) {
 108           switch(frame[j+1]) {
 109             case 0x01:
 110               crc = "[1] Two drops close after each other";
 111             break;
 112             case 0x02:
 113               crc = "[2] Potential SOC with a drop in second half of bitperiod";
 114               break;
 115             case 0x03:
 116               crc = "[3] Segment Z after segment X is not possible";
 117               break;
 118             case 0x04:
 119               crc = "[4] Parity bit of a fully received byte was wrong";
 120               break;
 121             default:
 122               crc = "[?] Unknown error";
 123               break;
 124           }
 125           break;
 126         }*/
 127       }
 128
 129       if (strlen(crc)==0) {
 130         if(!isResponse && len == 4) {
 131                 // Rough guess that this is a command from the reader
 132                 // For iClass the command byte is not part of the CRC
 133                 ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
 134         }
 135         else {
 136                 // For other data.. CRC might not be applicable (UPDATE commands etc.)
 137                 ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
 138         }
 139         //printf("%1x %1x",(unsigned)b1,(unsigned)b2);
 140         if (b1 != frame[len-2] || b2 != frame[len-1]) {
 141           crc = (isResponse & (len < 8)) ? "" : " !crc";
 142         } else {
 143           crc = "";
 144         }
 145       }
 146     } else {
 147       crc = ""; // SHORT
 148     }
 149
 150     char metricString[100];
 151     if (isResponse) {
 152       sprintf(metricString, "%3d", metric);
 153     } else {
 154       strcpy(metricString, "   ");
 155     }
 156
 157     PrintAndLog(" +%7d: %s: %s %s %s",
 158       (prev < 0 ? 0 : (timestamp - prev)),
 159       metricString,
 160       (isResponse ? "TAG" : "   "), line, crc);
 161
 162     prev = timestamp;
 163     i += (len + 9);
 164   }
 165   return 0;
 166 }
 167
 168 int CmdHFiClassSnoop(const char *Cmd)
 169 {
 170   UsbCommand c = {CMD_SNOOP_ICLASS};
 171   SendCommand(&c);
 172   return 0;
 173 }
 174
 175 int CmdHFiClassSim(const char *Cmd)
 176 {
 177   uint8_t simType = 0;
 178   uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 179
 180   if (strlen(Cmd)<2) {
 181         PrintAndLog("Usage:  hf iclass sim    <sim type> <CSN (16 hex symbols)>");
 182         PrintAndLog("        sample: hf iclass sim 0 031FEC8AF7FF12E0");
 183         return 0;
 184   }
 185
 186   simType = param_get8(Cmd, 0);
 187   if (param_gethex(Cmd, 1, CSN, 16)) {
 188         PrintAndLog("A CSN should consist of 16 HEX symbols");
 189         return 1;
 190   }
 191   PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
 192
 193   UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType}};
 194   memcpy(c.d.asBytes, CSN, 8);
 195   SendCommand(&c);
 196
 197   return 0;
 198 }
 199
 200 int CmdHFiClassReader(const char *Cmd)
 201 {
 202   uint8_t readerType = 0;
 203
 204   if (strlen(Cmd)<1) {
 205         PrintAndLog("Usage:  hf iclass reader    <reader type>");
 206         PrintAndLog("        sample: hf iclass reader 0");
 207         return 0;
 208   }
 209
 210   readerType = param_get8(Cmd, 0);
 211   PrintAndLog("--readertype:%02x", readerType);
 212
 213   UsbCommand c = {CMD_READER_ICLASS, {readerType}};
 214   SendCommand(&c);
 215
 216   return 0;
 217 }
 218
 219 int CmdHFiClassReader_Replay(const char *Cmd)
 220 {
 221   uint8_t readerType = 0;
 222   uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00};
 223
 224   if (strlen(Cmd)<1) {
 225     PrintAndLog("Usage:  hf iclass replay <MAC>");
 226     PrintAndLog("        sample: hf iclass replay 00112233");
 227     return 0;
 228   }
 229
 230   if (param_gethex(Cmd, 0, MAC, 8)) {
 231     PrintAndLog("MAC must include 8 HEX symbols");
 232     return 1;
 233   }
 234
 235   UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
 236   memcpy(c.d.asBytes, MAC, 4);
 237   SendCommand(&c);
 238
 239   return 0;
 240 }
 241
 242 int CmdHFiClassReader_Dump(const char *Cmd)
 243 {
 244   uint8_t readerType = 0;
 245   uint8_t MAC[4]={0x00,0x00,0x00,0x00};
 246   uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 247   uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 248   uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 249   //uint8_t CC_temp[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 250   uint8_t result[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 251   uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 252   des_context ctx_enc;
 253   uint64_t crypted_id=0;
 254
 255   if (strlen(Cmd)<1)
 256   {
 257     //PrintAndLog("Usage:  hf iclass dump <Key> <CSN> <CC>");
 258     //PrintAndLog("        sample: hf iclass dump 0011223344556677 aabbccddeeffgghh FFFFFFFFFFFFFFFF");
 259     PrintAndLog("Usage:  hf iclass dump <Key>");
 260     PrintAndLog("        sample: hf iclass dump 0011223344556677");
 261     return 0;
 262   }
 263
 264   if (param_gethex(Cmd, 0, KEY, 16))
 265   {
 266     PrintAndLog("KEY must include 16 HEX symbols");
 267     return 1;
 268   }
 269
 270   /*if (param_gethex(Cmd, 1, CSN, 16))
 271   {
 272     PrintAndLog("CSN must include 16 HEX symbols");
 273     return 1;
 274   }
 275   if (param_gethex(Cmd, 2, CC_temp, 16))
 276   {
 277     PrintAndLog("CC must include 16 HEX symbols");
 278     return 1;
 279   }*/
 280
 281   UsbCommand c = {CMD_ICLASS_ISO14443A_GETPUBLIC, {0}};
 282   //memcpy(c.d.asBytes, MAC, 4);
 283   SendCommand(&c);
 284
 285   UsbCommand resp;
 286   if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
 287     uint8_t isOK    = resp.arg[0] & 0xff;
 288     uint8_t * data  = resp.d.asBytes;
 289
 290     memcpy(CSN,data,8);
 291     memcpy(CCNR,data+8,8);
 292     PrintAndLog("DEBUG: CSN %s",sprint_hex(CSN,8));
 293     PrintAndLog("DEBUG: CC  %s",sprint_hex(CCNR,8));
 294         PrintAndLog("isOk:%02x", isOK);
 295   } else {
 296         PrintAndLog("Command execute timeout");
 297   }
 298
 299   //memcpy(CCNR,CC_temp,8);
 300   des_setkey_enc( &ctx_enc, KEY);
 301   des_crypt_ecb(&ctx_enc,CSN,result);
 302   PrintAndLog("DES Key: %s",sprint_hex(result,8));
 303   uint64_t newz=0;
 304   crypted_id = bytes_to_num(result,8);
 305   uint64_t x = (crypted_id & 0xFFFF000000000000 );
 306   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,0),7);
 307   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,1),6);
 308   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,2),5);
 309   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,3),4);
 310   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,4),3);
 311   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,5),2);
 312   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,6),1);
 313   pushbackSixBitByte(&newz, getSixBitByte(crypted_id,7),0);
 314   newz|= x;
 315   crypted_id=newz;
 316   num_to_bytes(crypted_id,8,result);
 317   PrintAndLog("DESr Key: %s",sprint_hex(result,8));
 318   hash0(crypted_id,div_key);
 319   PrintAndLog("Div Key: %s",sprint_hex(div_key,8));
 320   calc_iclass_mac(CCNR,12,div_key,MAC);
 321
 322   UsbCommand d = {CMD_READER_ICLASS_REPLAY, {readerType}};
 323   memcpy(d.d.asBytes, MAC, 4);
 324   SendCommand(&d);
 325
 326   return 0;
 327 }
 328
 329 static command_t CommandTable[] =
 330 {
 331   {"help",      CmdHelp,                1,      "This help"},
 332   {"list",      CmdHFiClassList,        0,      "List iClass history"},
 333   {"snoop",     CmdHFiClassSnoop,       0,      "Eavesdrop iClass communication"},
 334   {"sim",       CmdHFiClassSim,         0,      "Simulate iClass tag"},
 335   {"reader",    CmdHFiClassReader,      0,      "Read an iClass tag"},
 336   {"replay",    CmdHFiClassReader_Replay,0,     "Read an iClass tag via Reply Attack"},
 337   {"dump",      CmdHFiClassReader_Dump, 0,      "Authenticate and Dump iClass tag"},
 338   {NULL, NULL, 0, NULL}
 339 };
 340
 341 int CmdHFiClass(const char *Cmd)
 342 {
 343   CmdsParse(CommandTable, Cmd);
 344   return 0;
 345 }
 346
 347 int CmdHelp(const char *Cmd)
 348 {
 349   CmdsHelp(CommandTable);
 350   return 0;
 351 }
 352