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

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2012 Roel Verdult
   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 Hitag support
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include "data.h"
  15 #include "proxusb.h"
  16 #include "ui.h"
  17 #include "cmdparser.h"
  18 #include "common.h"
  19 #include "util.h"
  20 #include "hitag2.h"
  21
  22 static int CmdHelp(const char *Cmd);
  23
  24 int CmdLFHitagList(const char *Cmd)
  25 {
  26   uint8_t got[3000];
  27   GetFromBigBuf(got,sizeof(got),0);
  28   char filename[256];
  29   FILE* pf;
  30
  31   param_getstr(Cmd,0,filename);
  32
  33   if (strlen(filename) > 0) {
  34       if ((pf = fopen(filename,"w")) == NULL) {
  35             PrintAndLog("Error: Could not open file [%s]",filename);
  36             return 1;
  37           }
  38   }
  39
  40   PrintAndLog("recorded activity:");
  41   PrintAndLog(" ETU     :rssi: who bytes");
  42   PrintAndLog("---------+----+----+-----------");
  43
  44   int i = 0;
  45   int prev = -1;
  46
  47   for (;;) {
  48     if(i >= 1900) {
  49       break;
  50     }
  51
  52     bool isResponse;
  53     int timestamp = *((uint32_t *)(got+i));
  54     if (timestamp & 0x80000000) {
  55       timestamp &= 0x7fffffff;
  56       isResponse = 1;
  57     } else {
  58       isResponse = 0;
  59     }
  60
  61     int metric = 0;
  62     int parityBits = *((uint32_t *)(got+i+4));
  63     // 4 bytes of additional information...
  64     // maximum of 32 additional parity bit information
  65     //
  66     // TODO:
  67     // at each quarter bit period we can send power level (16 levels)
  68     // or each half bit period in 256 levels.
  69
  70     int len = got[i+8];
  71
  72     if (len > 100) {
  73       break;
  74     }
  75     if (i + len >= 1900) {
  76       break;
  77     }
  78
  79     uint8_t *frame = (got+i+9);
  80
  81     // Break and stick with current result if buffer was not completely full
  82     if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
  83
  84     char line[1000] = "";
  85     int j;
  86     for (j = 0; j < len; j++) {
  87       int oddparity = 0x01;
  88       int k;
  89
  90       for (k=0;k<8;k++) {
  91         oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
  92       }
  93
  94       //if((parityBits >> (len - j - 1)) & 0x01) {
  95       if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
  96         sprintf(line+(j*4), "%02x!  ", frame[j]);
  97       }
  98       else {
  99         sprintf(line+(j*4), "%02x   ", frame[j]);
 100       }
 101     }
 102
 103     char metricString[100];
 104     if (isResponse) {
 105       sprintf(metricString, "%3d", metric);
 106     } else {
 107       strcpy(metricString, "   ");
 108     }
 109
 110     PrintAndLog(" +%7d: %s: %s %s",
 111       (prev < 0 ? 0 : (timestamp - prev)),
 112       metricString,
 113       (isResponse ? "TAG" : "   "),
 114       line);
 115
 116
 117         if (strlen(filename) > 0) {
 118       fprintf(pf," +%7d: %s: %s %s %s",
 119                                         (prev < 0 ? 0 : (timestamp - prev)),
 120                                         metricString,
 121                                         (isResponse ? "TAG" : "   "),
 122                                         line,
 123                                         "\n");
 124     }
 125
 126     prev = timestamp;
 127     i += (len + 9);
 128   }
 129
 130   if (strlen(filename) > 0) {
 131           PrintAndLog("Recorded activity succesfully written to file: %s", filename);
 132     fclose(pf);
 133   }
 134
 135   return 0;
 136 }
 137
 138 int CmdLFHitagSnoop(const char *Cmd) {
 139   UsbCommand c = {CMD_SNOOP_HITAG};
 140   SendCommand(&c);
 141   return 0;
 142 }
 143
 144 int CmdLFHitagSim(const char *Cmd) {
 145   UsbCommand c = {CMD_SIMULATE_HITAG};
 146         char filename[256];
 147         FILE* pf;
 148         bool tag_mem_supplied;
 149
 150         param_getstr(Cmd,0,filename);
 151
 152         if (strlen(filename) > 0) {
 153                 if ((pf = fopen(filename,"rb+")) == NULL) {
 154                         PrintAndLog("Error: Could not open file [%s]",filename);
 155                         return 1;
 156                 }
 157                 tag_mem_supplied = true;
 158                 fread(c.d.asBytes,48,1,pf);
 159                 fclose(pf);
 160         } else {
 161                 tag_mem_supplied = false;
 162         }
 163
 164         // Does the tag comes with memory
 165         c.arg[0] = (uint32_t)tag_mem_supplied;
 166
 167   SendCommand(&c);
 168   return 0;
 169 }
 170
 171 int CmdLFHitagReader(const char *Cmd) {
 172 //  UsbCommand c = {CMD_READER_HITAG};
 173
 174 //      param_get32ex(Cmd,1,0,16);
 175         UsbCommand c = {CMD_READER_HITAG};//, {param_get32ex(Cmd,0,0,10),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),param_get32ex(Cmd,3,0,16)}};
 176         hitag_data* htd = (hitag_data*)c.d.asBytes;
 177         hitag_function htf = param_get32ex(Cmd,0,0,10);
 178
 179         switch (htf) {
 180                 case RHT2F_PASSWORD: {
 181                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
 182                 } break;
 183                 case RHT2F_AUTHENTICATE: {
 184                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 185                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 186                 } break;
 187                 case RHT2F_TEST_AUTH_ATTEMPTS: {
 188                         // No additional parameters needed
 189                 } break;
 190                 default: {
 191                         PrintAndLog("Error: unkown reader function %d",htf);
 192                         PrintAndLog("Hitag reader functions",htf);
 193                         PrintAndLog(" HitagS (0*)",htf);
 194                         PrintAndLog(" Hitag1 (1*)",htf);
 195                         PrintAndLog(" Hitag2 (2*)",htf);
 196                         PrintAndLog("  21 <password> (password mode)",htf);
 197                         PrintAndLog("  22 <nr> <ar> (authentication)",htf);
 198                         PrintAndLog("  25 (test recorded authentications)",htf);
 199                         return 1;
 200                 } break;
 201         }
 202
 203         // Copy the hitag2 function into the first argument
 204         c.arg[0] = htf;
 205
 206   SendCommand(&c);
 207   return 0;
 208 }
 209
 210 static command_t CommandTableHitag[] =
 211 {
 212   {"help",    CmdHelp,           1, "This help"},
 213   {"list",    CmdLFHitagList,    1, "List Hitag trace history"},
 214   {"reader",  CmdLFHitagReader,  1, "Act like a Hitag Reader"},
 215   {"sim",     CmdLFHitagSim,     1, "Simulate Hitag transponder"},
 216   {"snoop",   CmdLFHitagSnoop,   1, "Eavesdrop Hitag communication"},
 217                 {NULL, NULL, 0, NULL}
 218 };
 219
 220 int CmdLFHitag(const char *Cmd)
 221 {
 222   CmdsParse(CommandTableHitag, Cmd);
 223   return 0;
 224 }
 225
 226 int CmdHelp(const char *Cmd)
 227 {
 228   CmdsHelp(CommandTableHitag);
 229   return 0;
 230 }