cvs.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfio.c

   1 //-----------------------------------------------------------------------------
   2 //
   3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   4 // at your option, any later version. See the LICENSE.txt file for the text of
   5 // the license.
   6 //-----------------------------------------------------------------------------
   7 // Low frequency ioProx commands
   8 // FSK2a, rf/64, 64 bits (complete)
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <inttypes.h>
  15 #include <limits.h>
  16 #include "cmdlfio.h"
  17 #include "proxmark3.h"
  18 #include "data.h"
  19 #include "graph.h"
  20 #include "ui.h"
  21 #include "cmdparser.h"
  22 #include "cmdmain.h"
  23 #include "cmddata.h"
  24 #include "cmdlf.h"
  25 #include "lfdemod.h"  //for IOdemodFSK + bytebits_to_byte
  26 #include "util.h"     //for sprint_bin_break
  27
  28 static int CmdHelp(const char *Cmd);
  29
  30 int CmdIOReadFSK(const char *Cmd)
  31 {
  32   int findone=0;
  33   if(Cmd[0]=='1') findone=1;
  34
  35   UsbCommand c={CMD_IO_DEMOD_FSK};
  36   c.arg[0]=findone;
  37   SendCommand(&c);
  38   return 0;
  39 }
  40
  41 //by marshmellow
  42 //IO-Prox demod - FSK RF/64 with preamble of 000000001
  43 //print ioprox ID and some format details
  44 int CmdFSKdemodIO(const char *Cmd)
  45 {
  46   int idx=0;
  47   //something in graphbuffer?
  48   if (GraphTraceLen < 65) {
  49     if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
  50     return 0;
  51   }
  52   uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
  53   size_t BitLen = getFromGraphBuf(BitStream);
  54   if (BitLen==0) return 0;
  55
  56   //get binary from fsk wave
  57   idx = IOdemodFSK(BitStream,BitLen);
  58   if (idx<0){
  59     if (g_debugMode){
  60       if (idx==-1){
  61         PrintAndLog("DEBUG: Just Noise Detected");
  62       } else if (idx == -2) {
  63         PrintAndLog("DEBUG: not enough samples");
  64       } else if (idx == -3) {
  65         PrintAndLog("DEBUG: error during fskdemod");
  66       } else if (idx == -4) {
  67         PrintAndLog("DEBUG: Preamble not found");
  68       } else if (idx == -5) {
  69         PrintAndLog("DEBUG: Separator bits not found");
  70       } else {
  71         PrintAndLog("DEBUG: Error demoding fsk %d", idx);
  72       }
  73     }
  74     return 0;
  75   }
  76   if (idx==0){
  77     if (g_debugMode){
  78       PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
  79       if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
  80     }
  81     return 0;
  82   }
  83     //Index map
  84     //0           10          20          30          40          50          60
  85     //|           |           |           |           |           |           |
  86     //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
  87     //-----------------------------------------------------------------------------
  88     //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
  89     //
  90     //XSF(version)facility:codeone+codetwo (raw)
  91     //Handle the data
  92   if (idx+64>BitLen) {
  93     if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
  94     return 0;
  95   }
  96   PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx],    BitStream[idx+1],  BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
  97   PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9],  BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
  98   PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
  99   PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
 100   PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
 101   PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
 102   PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
 103
 104   uint32_t code = bytebits_to_byte(BitStream+idx,32);
 105   uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
 106   uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
 107   uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
 108   uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
 109   uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
 110   uint16_t calccrc = 0;
 111
 112   for (uint8_t i=1; i<6; ++i){
 113     calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
 114   }
 115   calccrc &= 0xff;
 116   calccrc = 0xff - calccrc;
 117
 118   char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
 119
 120   PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
 121   setDemodBuf(BitStream,64,idx);
 122   if (g_debugMode){
 123     PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
 124     printDemodBuff();
 125   }
 126   return 1;
 127 }
 128
 129 int CmdIOClone(const char *Cmd)
 130 {
 131   unsigned int hi = 0, lo = 0;
 132   int n = 0, i = 0;
 133   UsbCommand c;
 134
 135
 136   //if (1 == sscanf(str, "0x%"SCNx32, &hi)) {
 137     // value now contains the value in the string--decimal 255, in this case.
 138   //}
 139
 140   while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 141       hi = (hi << 4) | (lo >> 28);
 142       lo = (lo << 4) | (n & 0xf);
 143   }
 144
 145   PrintAndLog("Cloning tag with ID %08x %08x", hi, lo);
 146   PrintAndLog("Press pm3-button to abort simulation");
 147   c.cmd = CMD_IO_CLONE_TAG;
 148   c.arg[0] = hi;
 149   c.arg[1] = lo;
 150
 151   SendCommand(&c);
 152   return 0;
 153 }
 154
 155 static command_t CommandTable[] =
 156 {
 157   {"help",        CmdHelp,            1, "This help"},
 158   {"demod",       CmdFSKdemodIO,      1, "Demodulate IO Prox tag from the GraphBuffer"},
 159   {"read",        CmdIOReadFSK,       0, "['1'] Realtime IO FSK demodulate from antenna (option '1' for one tag only)"},
 160   {"clone",       CmdIOClone,         0, "Clone ioProx Tag"},
 161   {NULL, NULL, 0, NULL}
 162 };
 163
 164 int CmdLFIO(const char *Cmd)
 165 {
 166   CmdsParse(CommandTable, Cmd);
 167   return 0;
 168 }
 169
 170 int CmdHelp(const char *Cmd)
 171 {
 172   CmdsHelp(CommandTable);
 173   return 0;
 174 }