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