git.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 "proxmark3.h"
  17 #include "ui.h"
  18 #include "cmdparser.h"
  19 #include "common.h"
  20 #include "util.h"
  21 #include "hitag2.h"
  22 #include "sleep.h"
  23 #include "cmdmain.h"
  24
  25 static int CmdHelp(const char *Cmd);
  26
  27 int CmdLFHitagList(const char *Cmd)
  28 {
  29   uint8_t got[3000];
  30   GetFromBigBuf(got,sizeof(got),0);
  31   WaitForResponse(CMD_ACK,NULL);
  32
  33   char filename[256];
  34   FILE* pf = NULL;
  35
  36   if (param_getstr(Cmd,0,filename)) {
  37     if (strlen(filename) > 0) {
  38       if ((pf = fopen(filename,"w")) == NULL) {
  39         PrintAndLog("Error: Could not open file [%s]",filename);
  40         return 1;
  41       }
  42     }
  43   }
  44
  45   PrintAndLog("recorded activity:");
  46   PrintAndLog(" ETU     :rssi: who bytes");
  47   PrintAndLog("---------+----+----+-----------");
  48
  49   int i = 0;
  50   int prev = -1;
  51
  52   for (;;) {
  53     if(i >= 1900) {
  54       break;
  55     }
  56
  57     bool isResponse;
  58     int timestamp = *((uint32_t *)(got+i));
  59     if (timestamp & 0x80000000) {
  60       timestamp &= 0x7fffffff;
  61       isResponse = 1;
  62     } else {
  63       isResponse = 0;
  64     }
  65
  66     int metric = 0;
  67     int parityBits = *((uint32_t *)(got+i+4));
  68     // 4 bytes of additional information...
  69     // maximum of 32 additional parity bit information
  70     //
  71     // TODO:
  72     // at each quarter bit period we can send power level (16 levels)
  73     // or each half bit period in 256 levels.
  74
  75     int len = got[i+8];
  76
  77     if (len > 100) {
  78       break;
  79     }
  80     if (i + len >= 1900) {
  81       break;
  82     }
  83
  84     uint8_t *frame = (got+i+9);
  85
  86     // Break and stick with current result if buffer was not completely full
  87     if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
  88
  89     char line[1000] = "";
  90     int j;
  91     for (j = 0; j < len; j++) {
  92       int oddparity = 0x01;
  93       int k;
  94
  95       for (k=0;k<8;k++) {
  96         oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
  97       }
  98
  99       //if((parityBits >> (len - j - 1)) & 0x01) {
 100       if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
 101         sprintf(line+(j*4), "%02x!  ", frame[j]);
 102       }
 103       else {
 104         sprintf(line+(j*4), "%02x   ", frame[j]);
 105       }
 106     }
 107
 108     char metricString[100];
 109     if (isResponse) {
 110       sprintf(metricString, "%3d", metric);
 111     } else {
 112       strcpy(metricString, "   ");
 113     }
 114
 115     PrintAndLog(" +%7d: %s: %s %s",
 116       (prev < 0 ? 0 : (timestamp - prev)),
 117       metricString,
 118       (isResponse ? "TAG" : "   "),
 119       line);
 120
 121
 122    if (pf) {
 123       fprintf(pf," +%7d: %s: %s %s %s",
 124                                         (prev < 0 ? 0 : (timestamp - prev)),
 125                                         metricString,
 126                                         (isResponse ? "TAG" : "   "),
 127                                         line,
 128                                         "\n");
 129     }
 130
 131     prev = timestamp;
 132     i += (len + 9);
 133   }
 134
 135   if (pf) {
 136           PrintAndLog("Recorded activity succesfully written to file: %s", filename);
 137     fclose(pf);
 138   }
 139
 140   return 0;
 141 }
 142
 143 int CmdLFHitagSnoop(const char *Cmd) {
 144   UsbCommand c = {CMD_SNOOP_HITAG};
 145   SendCommand(&c);
 146   return 0;
 147 }
 148
 149 int CmdLFHitagSim(const char *Cmd) {
 150   UsbCommand c = {CMD_SIMULATE_HITAG};
 151         char filename[256] = { 0x00 };
 152         FILE* pf;
 153         bool tag_mem_supplied;
 154
 155         param_getstr(Cmd,0,filename);
 156
 157         if (strlen(filename) > 0) {
 158                 if ((pf = fopen(filename,"rb+")) == NULL) {
 159                         PrintAndLog("Error: Could not open file [%s]",filename);
 160                         return 1;
 161                 }
 162                 tag_mem_supplied = true;
 163                 fread(c.d.asBytes,48,1,pf);
 164                 fclose(pf);
 165         } else {
 166                 tag_mem_supplied = false;
 167         }
 168
 169         // Does the tag comes with memory
 170         c.arg[0] = (uint32_t)tag_mem_supplied;
 171
 172   SendCommand(&c);
 173   return 0;
 174 }
 175
 176 int CmdLFHitagReader(const char *Cmd) {
 177 //  UsbCommand c = {CMD_READER_HITAG};
 178
 179 //      param_get32ex(Cmd,1,0,16);
 180         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)}};
 181         hitag_data* htd = (hitag_data*)c.d.asBytes;
 182         hitag_function htf = param_get32ex(Cmd,0,0,10);
 183
 184         switch (htf) {
 185                 case RHT2F_PASSWORD: {
 186                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
 187                 } break;
 188                 case RHT2F_AUTHENTICATE: {
 189                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 190                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 191                 } break;
 192                 case RHT2F_CRYPTO: {
 193                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 194 //                      num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 195                 } break;
 196                 case RHT2F_TEST_AUTH_ATTEMPTS: {
 197                         // No additional parameters needed
 198                 } break;
 199                 default: {
 200                         PrintAndLog("Error: unkown reader function %d",htf);
 201                         PrintAndLog("Hitag reader functions",htf);
 202                         PrintAndLog(" HitagS (0*)",htf);
 203                         PrintAndLog(" Hitag1 (1*)",htf);
 204                         PrintAndLog(" Hitag2 (2*)",htf);
 205                         PrintAndLog("  21 <password> (password mode)",htf);
 206                         PrintAndLog("  22 <nr> <ar> (authentication)",htf);
 207                         PrintAndLog("  23 <key> (authentication) key is in format: ISK high + ISK low",htf);
 208                         PrintAndLog("  25 (test recorded authentications)",htf);
 209                         return 1;
 210                 } break;
 211         }
 212
 213         // Copy the hitag2 function into the first argument
 214         c.arg[0] = htf;
 215
 216   SendCommand(&c);
 217   return 0;
 218 }
 219
 220 static command_t CommandTableHitag[] =
 221 {
 222   {"help",    CmdHelp,           1, "This help"},
 223   {"list",    CmdLFHitagList,    1, "List Hitag trace history"},
 224   {"reader",  CmdLFHitagReader,  1, "Act like a Hitag Reader"},
 225   {"sim",     CmdLFHitagSim,     1, "Simulate Hitag transponder"},
 226   {"snoop",   CmdLFHitagSnoop,   1, "Eavesdrop Hitag communication"},
 227                 {NULL, NULL, 0, NULL}
 228 };
 229
 230 int CmdLFHitag(const char *Cmd)
 231 {
 232   CmdsParse(CommandTableHitag, Cmd);
 233   return 0;
 234 }
 235
 236 int CmdHelp(const char *Cmd)
 237 {
 238   CmdsHelp(CommandTableHitag);
 239   return 0;
 240 }