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

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   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 // Low frequency HID commands (known)
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include "cmdlfhid.h"
  14 #include "proxmark3.h"
  15 #include "ui.h"
  16 #include "graph.h"
  17 #include "cmdparser.h"
  18 #include "cmddata.h"  //for g_debugMode, demodbuff cmds
  19 #include "lfdemod.h" // for HIDdemodFSK
  20
  21 static int CmdHelp(const char *Cmd);
  22
  23 //by marshmellow (based on existing demod + holiman's refactor)
  24 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
  25 //print full HID Prox ID and some bit format details if found
  26 int CmdFSKdemodHID(const char *Cmd)
  27 {
  28   //raw fsk demod no manchester decoding no start bit finding just get binary from wave
  29   uint32_t hi2=0, hi=0, lo=0;
  30
  31   uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
  32   size_t BitLen = getFromGraphBuf(BitStream);
  33   if (BitLen==0) return 0;
  34   //get binary from fsk wave
  35   int waveIdx = 0;
  36   int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo, &waveIdx);
  37   if (idx<0){
  38     if (g_debugMode){
  39       if (idx==-1){
  40         PrintAndLog("DEBUG: Just Noise Detected");
  41       } else if (idx == -2) {
  42         PrintAndLog("DEBUG: Error demoding fsk");
  43       } else if (idx == -3) {
  44         PrintAndLog("DEBUG: Preamble not found");
  45       } else if (idx == -4) {
  46         PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
  47       } else {
  48         PrintAndLog("DEBUG: Error demoding fsk %d", idx);
  49       }
  50     }
  51     return 0;
  52   }
  53   if (hi2==0 && hi==0 && lo==0) {
  54     if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
  55     return 0;
  56   }
  57   if (hi2 != 0){ //extra large HID tags
  58     PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
  59        (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
  60   }
  61   else {  //standard HID tags <38 bits
  62     uint8_t fmtLen = 0;
  63     uint32_t fc = 0;
  64     uint32_t cardnum = 0;
  65     if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
  66       uint32_t lo2=0;
  67       lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
  68       uint8_t idx3 = 1;
  69       while(lo2>1){ //find last bit set to 1 (format len bit)
  70         lo2=lo2>>1;
  71         idx3++;
  72       }
  73       fmtLen =idx3+19;
  74       fc =0;
  75       cardnum=0;
  76       if(fmtLen==26){
  77         cardnum = (lo>>1)&0xFFFF;
  78         fc = (lo>>17)&0xFF;
  79       }
  80       if(fmtLen==34){
  81         cardnum = (lo>>1)&0xFFFF;
  82         fc= ((hi&1)<<15)|(lo>>17);
  83       }
  84       if(fmtLen==35){
  85         cardnum = (lo>>1)&0xFFFFF;
  86         fc = ((hi&1)<<11)|(lo>>21);
  87       }
  88     }
  89     else { //if bit 38 is not set then 37 bit format is used
  90       fmtLen = 37;
  91       fc = 0;
  92       cardnum = 0;
  93       if(fmtLen == 37){
  94         cardnum = (lo>>1)&0x7FFFF;
  95         fc = ((hi&0xF)<<12)|(lo>>20);
  96       }
  97     }
  98     PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
  99       (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
 100       (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
 101   }
 102   setDemodBuf(BitStream,BitLen,idx);
 103   setClockGrid(50, waveIdx + (idx*50));
 104   if (g_debugMode){
 105     PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
 106     printDemodBuff();
 107   }
 108   return 1;
 109 }
 110
 111 int CmdHIDReadFSK(const char *Cmd)
 112 {
 113   int findone=0;
 114         if(Cmd[0]=='1') findone=1;
 115   UsbCommand c={CMD_HID_DEMOD_FSK};
 116   c.arg[0]=findone;
 117   SendCommand(&c);
 118   return 0;
 119 }
 120
 121 int CmdHIDSim(const char *Cmd)
 122 {
 123         uint32_t hi = 0, lo = 0;
 124         int n = 0, i = 0;
 125
 126         while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 127                 hi = (hi << 4) | (lo >> 28);
 128                 lo = (lo << 4) | (n & 0xf);
 129         }
 130
 131         PrintAndLog("Emulating tag with ID %x%08x", hi, lo);
 132         PrintAndLog("Press pm3-button to abort simulation");
 133
 134         UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
 135         SendCommand(&c);
 136         return 0;
 137 }
 138
 139 int CmdHIDClone(const char *Cmd)
 140 {
 141   unsigned int hi2 = 0, hi = 0, lo = 0;
 142   int n = 0, i = 0;
 143   UsbCommand c;
 144
 145   if (strchr(Cmd,'l') != 0) {
 146         while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 147       hi2 = (hi2 << 4) | (hi >> 28);
 148       hi = (hi << 4) | (lo >> 28);
 149       lo = (lo << 4) | (n & 0xf);
 150     }
 151
 152     PrintAndLog("Cloning tag with long ID %x%08x%08x", hi2, hi, lo);
 153
 154     c.d.asBytes[0] = 1;
 155   }
 156   else {
 157         while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 158       hi = (hi << 4) | (lo >> 28);
 159       lo = (lo << 4) | (n & 0xf);
 160     }
 161
 162     PrintAndLog("Cloning tag with ID %x%08x", hi, lo);
 163
 164     hi2 = 0;
 165     c.d.asBytes[0] = 0;
 166   }
 167
 168   c.cmd = CMD_HID_CLONE_TAG;
 169   c.arg[0] = hi2;
 170   c.arg[1] = hi;
 171   c.arg[2] = lo;
 172
 173   SendCommand(&c);
 174   return 0;
 175 }
 176
 177 static command_t CommandTable[] =
 178 {
 179   {"help",      CmdHelp,        1, "This help"},
 180   {"demod",     CmdFSKdemodHID, 1, "Demodulate HID Prox from GraphBuffer"},
 181   {"read",      CmdHIDReadFSK,  0, "['1'] Realtime HID FSK Read from antenna (option '1' for one tag only)"},
 182   {"sim",       CmdHIDSim,      0, "<ID> -- HID tag simulator"},
 183   {"clone",     CmdHIDClone,    0, "<ID> ['l'] -- Clone HID to T55x7 (tag must be in antenna)(option 'l' for 84bit ID)"},
 184   {NULL, NULL, 0, NULL}
 185 };
 186
 187 int CmdLFHID(const char *Cmd)
 188 {
 189   CmdsParse(CommandTable, Cmd);
 190   return 0;
 191 }
 192
 193 int CmdHelp(const char *Cmd)
 194 {
 195   CmdsHelp(CommandTable);
 196   return 0;
 197 }