git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfawid.c

   1 //-----------------------------------------------------------------------------
   2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
   3 //
   4 // cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   5 //
   6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   7 // at your option, any later version. See the LICENSE.txt file for the text of
   8 // the license.
   9 //-----------------------------------------------------------------------------
  10 // Low frequency AWID26 commands
  11 //-----------------------------------------------------------------------------
  12
  13 #include <stdio.h>      // sscanf
  14 #include "proxmark3.h"  // Definitions, USB controls, etc
  15 #include "ui.h"         // PrintAndLog
  16 #include "cmdparser.h"  // CmdsParse, CmdsHelp
  17 #include "cmdlfawid.h"  // AWID function declarations
  18 #include "lfdemod.h"    // parityTest
  19 #include "cmdmain.h"
  20 static int CmdHelp(const char *Cmd);
  21
  22
  23 int usage_lf_awid_fskdemod(void) {
  24   PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
  25   PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
  26   PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
  27   PrintAndLog("");
  28   PrintAndLog("Usage:  lf awid fskdemod ['1']");
  29   PrintAndLog("  Options : ");
  30   PrintAndLog("  1 : (optional) stop after reading a single card");
  31   PrintAndLog("");
  32   PrintAndLog("   sample : lf awid fskdemod");
  33   PrintAndLog("          : lf awid fskdemod 1");
  34   return 0;
  35 }
  36
  37 int usage_lf_awid_sim(void) {
  38   PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
  39   PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  40   PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  41   PrintAndLog("");
  42   PrintAndLog("Usage:  lf awid sim <Facility-Code> <Card-Number>");
  43   PrintAndLog("  Options : ");
  44   PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
  45   PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
  46   PrintAndLog("");
  47   PrintAndLog("   sample : lf awid sim 224 1337");
  48   return 0;
  49 }
  50
  51 int usage_lf_awid_clone(void) {
  52   PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
  53   PrintAndLog("The T55x7 must be on the antenna when issuing this command.  T55x7 blocks are calculated and printed in the process.");
  54   PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  55   PrintAndLog("");
  56   PrintAndLog("Usage:  lf awid clone <Facility-Code> <Card-Number>");
  57   PrintAndLog("  Options : ");
  58   PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
  59   PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
  60   PrintAndLog("");
  61   PrintAndLog("   sample : lf awid clone 224 1337");
  62   return 0;
  63 }
  64
  65 int CmdAWIDDemodFSK(const char *Cmd)
  66 {
  67   int findone=0;
  68   if(Cmd[0]=='1') findone=1;
  69   if (Cmd[0]=='h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
  70   UsbCommand c={CMD_AWID_DEMOD_FSK};
  71   c.arg[0]=findone;
  72   clearCommandBuffer();
  73   SendCommand(&c);
  74   return 0;
  75 }
  76
  77 int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits)
  78 {
  79   int i;
  80   uint32_t fcode=(fc & 0x000000FF), cnum=(cn & 0x0000FFFF), uBits=0;
  81   if (fcode != fc)
  82     PrintAndLog("NOTE: Facility code truncated for AWID26 format (8-bit facility code)");
  83   if (cnum!=cn)
  84     PrintAndLog("NOTE: Card number was truncated for AWID26 format (16-bit card number)");
  85
  86   AWIDBits[0] = 0x01; // 6-bit Preamble with 2 parity bits
  87   AWIDBits[1] = 0x1D; // First byte from card format (26-bit) plus parity bits
  88   AWIDBits[2] = 0x80; // Set the next two bits as 0b10 to finish card format
  89   uBits = (fcode<<4) + (cnum>>12);
  90   if (!parityTest(uBits,12,0))
  91     AWIDBits[2] |= (1<<5); // If not already even parity, set bit to make even
  92   uBits = AWIDBits[2]>>5;
  93   if (!parityTest(uBits, 3, 1))
  94     AWIDBits[2] |= (1<<4);
  95   uBits = fcode>>5; // first 3 bits of facility-code
  96   AWIDBits[2] += (uBits<<1);
  97   if (!parityTest(uBits, 3, 1))
  98     AWIDBits[2]++; // Set parity bit to make odd parity
  99   uBits = (fcode & 0x1C)>>2;
 100   AWIDBits[3] = 0;
 101   if (!parityTest(uBits,3,1))
 102     AWIDBits[3] |= (1<<4);
 103   AWIDBits[3] += (uBits<<5);
 104   uBits = ((fcode & 0x3)<<1) + ((cnum & 0x8000)>>15); // Grab/shift 2 LSBs from facility code and add shifted MSB from cardnum
 105   if (!parityTest(uBits,3,1))
 106     AWIDBits[3]++; // Set LSB for parity
 107   AWIDBits[3]+= (uBits<<1);
 108   uBits = (cnum & 0x7000)>>12;
 109   AWIDBits[4] = uBits<<5;
 110   if (!parityTest(uBits,3,1))
 111     AWIDBits[4] |= (1<<4);
 112   uBits = (cnum & 0x0E00)>>9;
 113   AWIDBits[4] += (uBits<<1);
 114   if (!parityTest(uBits,3,1))
 115     AWIDBits[4]++; // Set LSB for parity
 116   uBits = (cnum & 0x1C0)>>6; // Next bits from card number
 117   AWIDBits[5]=(uBits<<5);
 118   if (!parityTest(uBits,3,1))
 119     AWIDBits[5] |= (1<<4); // Set odd parity bit as needed
 120   uBits = (cnum & 0x38)>>3;
 121   AWIDBits[5]+= (uBits<<1);
 122   if (!parityTest(uBits,3,1))
 123     AWIDBits[5]++; // Set odd parity bit as needed
 124   uBits = (cnum & 0x7); // Last three bits from card number!
 125   AWIDBits[6] = (uBits<<5);
 126   if (!parityTest(uBits,3,1))
 127     AWIDBits[6] |= (1<<4);
 128   uBits = (cnum & 0x0FFF);
 129   if (!parityTest(uBits,12,1))
 130     AWIDBits[6] |= (1<<3);
 131   else
 132     AWIDBits[6]++;
 133   for (i = 7; i<12; i++)
 134     AWIDBits[i]=0x11;
 135   return 1;
 136 }
 137
 138 int CmdAWIDSim(const char *Cmd)
 139 {
 140   uint32_t fcode = 0, cnum = 0, fc=0, cn=0, i=0;
 141   uint8_t *BS, BitStream[12];
 142   uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
 143   uint64_t arg2 = 50; // clk RF/50 invert=0
 144   BS = BitStream;
 145   if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
 146     return usage_lf_awid_sim();
 147   }
 148
 149   fcode=(fc & 0x000000FF);
 150   cnum=(cn & 0x0000FFFF);
 151   if (fc!=fcode)
 152     PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
 153   if (cn!=cnum)
 154     PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
 155   PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
 156   PrintAndLog("Press pm3-button to abort simulation or run another command");
 157   // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 158   if (getAWIDBits(fc, cn, BS)) {
 159       PrintAndLog("Running 'lf simfsk c 50 H 10 L 8 d %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'",
 160                                         BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],
 161                                         BS[7],BS[8],BS[9],BS[10],BS[11]);
 162     } else
 163       PrintAndLog("Error with tag bitstream generation.");
 164   UsbCommand c;
 165   c.cmd = CMD_FSK_SIM_TAG;
 166   c.arg[0] = arg1; // fcHigh<<8 + fcLow
 167   c.arg[1] = arg2; // Inversion and clk setting
 168   c.arg[2] = 96; // Bitstream length: 96-bits == 12 bytes
 169   for (i=0; i < 96; i++)
 170     c.d.asBytes[i] = (BS[i/8] & (1<<(7-(i%8))))?1:0;
 171   clearCommandBuffer();
 172     SendCommand(&c);
 173   return 0;
 174 }
 175
 176 int CmdAWIDClone(const char *Cmd)
 177 {
 178         clearCommandBuffer();
 179         uint32_t fc=0,cn=0,blocks[4] = {0x00107060, 0, 0, 0x11111111}, i=0;
 180         uint8_t BitStream[12];
 181         uint8_t *BS=BitStream;
 182         UsbCommand c, resp;
 183
 184         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
 185                 return usage_lf_awid_clone();
 186         }
 187
 188         if ((fc & 0xFF) != fc) {
 189                 fc &= 0xFF;
 190                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
 191         }
 192
 193         if ((cn & 0xFFFF) != cn) {
 194                 cn &= 0xFFFF;
 195                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
 196         }
 197
 198         if (getAWIDBits(fc,cn,BS)) {
 199                 PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u (Raw: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x)",
 200                                           fc,cn, BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],BS[7],BS[8],BS[9],BS[10],BS[11]);
 201                 blocks[1] = (BS[0]<<24) + (BS[1]<<16) + (BS[2]<<8) + (BS[3]);
 202                 blocks[2] = (BS[4]<<24) + (BS[5]<<16) + (BS[6]<<8) + (BS[7]);
 203                 PrintAndLog("Block 0: 0x%08x", blocks[0]);
 204                 PrintAndLog("Block 1: 0x%08x", blocks[1]);
 205                 PrintAndLog("Block 2: 0x%08x", blocks[2]);
 206                 PrintAndLog("Block 3: 0x%08x", blocks[3]);
 207                 for (i=0; i<4; i++) {
 208                         c.cmd = CMD_T55XX_WRITE_BLOCK;
 209                         c.arg[0] = blocks[i];
 210                         c.arg[1] = i;
 211                         c.arg[2] = 0;
 212                         SendCommand(&c);
 213                         if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 214                                 PrintAndLog("Error occurred, device did not respond during write operation.");
 215                                 return -1;
 216                         }
 217                 }
 218         }
 219         return 0;
 220 }
 221
 222 static command_t CommandTable[] =
 223 {
 224         {"help",      CmdHelp,         1, "This help"},
 225         {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},
 226         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
 227         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
 228         {NULL, NULL, 0, NULL}
 229 };
 230
 231 int CmdLFAWID(const char *Cmd)
 232 {
 233         CmdsParse(CommandTable, Cmd);
 234         return 0;
 235 }
 236
 237 int CmdHelp(const char *Cmd)
 238 {
 239         CmdsHelp(CommandTable);
 240         return 0;
 241 }