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         SendCommand(&c);
  73         return 0;
  74 }
  75
  76 int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits)
  77 {
  78         int i;
  79         uint32_t fcode=(fc & 0x000000FF), cnum=(cn & 0x0000FFFF), uBits=0;
  80         if (fcode != fc)
  81                 PrintAndLog("NOTE: Facility code truncated for AWID26 format (8-bit facility code)");
  82         if (cnum!=cn)
  83                 PrintAndLog("NOTE: Card number was truncated for AWID26 format (16-bit card number)");
  84
  85         AWIDBits[0] = 0x01; // 6-bit Preamble with 2 parity bits
  86         AWIDBits[1] = 0x1D; // First byte from card format (26-bit) plus parity bits
  87         AWIDBits[2] = 0x80; // Set the next two bits as 0b10 to finish card format
  88         uBits = (fcode<<4) + (cnum>>12);
  89         if (!parityTest(uBits,12,0))
  90                 AWIDBits[2] |= (1<<5); // If not already even parity, set bit to make even
  91         uBits = AWIDBits[2]>>5;
  92         if (!parityTest(uBits, 3, 1))
  93                 AWIDBits[2] |= (1<<4);
  94         uBits = fcode>>5; // first 3 bits of facility-code
  95         AWIDBits[2] += (uBits<<1);
  96         if (!parityTest(uBits, 3, 1))
  97                 AWIDBits[2]++; // Set parity bit to make odd parity
  98         uBits = (fcode & 0x1C)>>2;
  99         AWIDBits[3] = 0;
 100         if (!parityTest(uBits,3,1))
 101                 AWIDBits[3] |= (1<<4);
 102         AWIDBits[3] += (uBits<<5);
 103         uBits = ((fcode & 0x3)<<1) + ((cnum & 0x8000)>>15); // Grab/shift 2 LSBs from facility code and add shifted MSB from cardnum
 104         if (!parityTest(uBits,3,1))
 105                 AWIDBits[3]++; // Set LSB for parity
 106         AWIDBits[3]+= (uBits<<1);
 107         uBits = (cnum & 0x7000)>>12;
 108         AWIDBits[4] = uBits<<5;
 109         if (!parityTest(uBits,3,1))
 110                 AWIDBits[4] |= (1<<4);
 111         uBits = (cnum & 0x0E00)>>9;
 112         AWIDBits[4] += (uBits<<1);
 113         if (!parityTest(uBits,3,1))
 114                 AWIDBits[4]++; // Set LSB for parity
 115         uBits = (cnum & 0x1C0)>>6; // Next bits from card number
 116         AWIDBits[5]=(uBits<<5);
 117         if (!parityTest(uBits,3,1))
 118                 AWIDBits[5] |= (1<<4); // Set odd parity bit as needed
 119         uBits = (cnum & 0x38)>>3;
 120         AWIDBits[5]+= (uBits<<1);
 121         if (!parityTest(uBits,3,1))
 122                 AWIDBits[5]++; // Set odd parity bit as needed
 123         uBits = (cnum & 0x7); // Last three bits from card number!
 124         AWIDBits[6] = (uBits<<5);
 125         if (!parityTest(uBits,3,1))
 126                 AWIDBits[6] |= (1<<4);
 127         uBits = (cnum & 0x0FFF);
 128         if (!parityTest(uBits,12,1))
 129                 AWIDBits[6] |= (1<<3);
 130         else
 131                 AWIDBits[6]++;
 132         for (i = 7; i<12; i++)
 133                 AWIDBits[i]=0x11;
 134         return 1;
 135 }
 136
 137 int CmdAWIDSim(const char *Cmd)
 138 {
 139         uint32_t fcode = 0, cnum = 0, fc=0, cn=0, i=0;
 140         uint8_t *BS, BitStream[12];
 141         uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
 142         uint64_t arg2 = 50; // clk RF/50 invert=0
 143         BS = BitStream;
 144         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
 145                 return usage_lf_awid_sim();
 146         }
 147
 148         fcode=(fc & 0x000000FF);
 149         cnum=(cn & 0x0000FFFF);
 150         if (fc!=fcode)
 151                 PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
 152         if (cn!=cnum)
 153                 PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
 154         PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
 155         PrintAndLog("Press pm3-button to abort simulation or run another command");
 156         // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 157         if (getAWIDBits(fc, cn, BS)) {
 158                         PrintAndLog("Running 'lf simfsk c 50 H 10 L 8 d %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'",
 159                                                                                                                                                                 BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],
 160                                                                                                                                                                 BS[7],BS[8],BS[9],BS[10],BS[11]);
 161                 } else
 162                         PrintAndLog("Error with tag bitstream generation.");
 163         UsbCommand c;
 164         c.cmd = CMD_FSK_SIM_TAG;
 165         c.arg[0] = arg1; // fcHigh<<8 + fcLow
 166         c.arg[1] = arg2; // Inversion and clk setting
 167         c.arg[2] = 96; // Bitstream length: 96-bits == 12 bytes
 168         for (i=0; i < 96; i++)
 169                 c.d.asBytes[i] = (BS[i/8] & (1<<(7-(i%8))))?1:0;
 170         SendCommand(&c);
 171         return 0;
 172 }
 173
 174 int CmdAWIDClone(const char *Cmd)
 175 {
 176         uint32_t fc=0,cn=0,blocks[4] = {0x00107060, 0, 0, 0x11111111}, i=0;
 177         uint8_t BitStream[12];
 178         uint8_t *BS=BitStream;
 179         UsbCommand c, resp;
 180
 181         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
 182                 return usage_lf_awid_clone();
 183         }
 184
 185         if ((fc & 0xFF) != fc) {
 186                 fc &= 0xFF;
 187                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
 188         }
 189         if ((cn & 0xFFFF) != cn) {
 190                 cn &= 0xFFFF;
 191                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
 192         }
 193         if (getAWIDBits(fc,cn,BS)) {
 194                 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)",
 195                                                                         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]);
 196                 blocks[1] = (BS[0]<<24) + (BS[1]<<16) + (BS[2]<<8) + (BS[3]);
 197                 blocks[2] = (BS[4]<<24) + (BS[5]<<16) + (BS[6]<<8) + (BS[7]);
 198                 PrintAndLog("Block 0: 0x%08x", blocks[0]);
 199                 PrintAndLog("Block 1: 0x%08x", blocks[1]);
 200                 PrintAndLog("Block 2: 0x%08x", blocks[2]);
 201                 PrintAndLog("Block 3: 0x%08x", blocks[3]);
 202                 for (i=0; i<4; i++) {
 203                         c.cmd = CMD_T55XX_WRITE_BLOCK;
 204                         c.arg[0] = blocks[i];
 205                         c.arg[1] = i;
 206                         c.arg[2] = 0;
 207                         SendCommand(&c);
 208                         if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 209                                 PrintAndLog("Error occurred, device did not respond during write operation.");
 210                                 return -1;
 211                         }
 212
 213                 }
 214         }
 215         return 0;
 216 }
 217
 218 static command_t CommandTable[] =
 219 {
 220         {"help",      CmdHelp,        1, "This help"},
 221         {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},
 222         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
 223         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
 224         {NULL, NULL, 0, NULL}
 225 };
 226
 227 int CmdLFAWID(const char *Cmd)
 228 {
 229         CmdsParse(CommandTable, Cmd);
 230         return 0;
 231 }
 232
 233 int CmdHelp(const char *Cmd)
 234 {
 235         CmdsHelp(CommandTable);
 236         return 0;
 237 }