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