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 "util.h"       // weigandparity
  20 #include "protocols.h"  // for T55xx config register definitions
  21 #include "cmdmain.h"
  22
  23 static int CmdHelp(const char *Cmd);
  24
  25 int usage_lf_awid_fskdemod(void) {
  26         PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
  27         PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
  28         PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
  29         PrintAndLog("");
  30         PrintAndLog("Usage:  lf awid fskdemod ['1']");
  31         PrintAndLog("Options : ");
  32         PrintAndLog("  1 : (optional) stop after reading a single card");
  33         PrintAndLog("");
  34         PrintAndLog("Samples : lf awid fskdemod");
  35         PrintAndLog("        : lf awid fskdemod 1");
  36         return 0;
  37 }
  38
  39 int usage_lf_awid_sim(void) {
  40         PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
  41         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  42         PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  43         PrintAndLog("");
  44         PrintAndLog("Usage:  lf awid sim <Facility-Code> <Card-Number>");
  45         PrintAndLog("Options : ");
  46         PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
  47         PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
  48         PrintAndLog("");
  49         PrintAndLog("Sample : lf awid sim 224 1337");
  50         return 0;
  51 }
  52
  53 int usage_lf_awid_clone(void) {
  54         PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
  55         PrintAndLog("The T55x7 must be on the antenna when issuing this command.  T55x7 blocks are calculated and printed in the process.");
  56         PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  57         PrintAndLog("");
  58         PrintAndLog("Usage:  lf awid clone <Facility-Code> <Card-Number>");
  59         PrintAndLog("Options : ");
  60         PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
  61         PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
  62         PrintAndLog("  Q5              : optional - clone to Q5 (T5555) instead of T55x7 chip");
  63         PrintAndLog("");
  64         PrintAndLog("Sample  : lf awid clone 224 1337");
  65         return 0;
  66 }
  67
  68 int CmdAWIDDemodFSK(const char *Cmd) {
  69         int findone=0;
  70         if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
  71         if (Cmd[0] == '1') findone = 1;
  72
  73         UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
  74         clearCommandBuffer();
  75         SendCommand(&c);
  76         return 0;
  77 }
  78
  79 //refactored by marshmellow
  80 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t       *AWIDBits) {
  81         uint8_t pre[66];
  82         memset(pre, 0, sizeof(pre));
  83         AWIDBits[7]=1;
  84         num_to_bytebits(26, 8, pre);
  85
  86         uint8_t wiegand[24];
  87         num_to_bytebits(fc, 8, wiegand);
  88         num_to_bytebits(cn, 16, wiegand+8);
  89
  90         wiegand_add_parity(pre+8, wiegand, 24);
  91
  92         size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);
  93         if (bitLen != 88) return 0;
  94         //for (uint8_t i = 0; i<3; i++){
  95         //      PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));
  96         //}
  97         return 1;
  98 }
  99
 100 int CmdAWIDSim(const char *Cmd) {
 101         uint32_t fcode = 0, cnum = 0, fc=0, cn=0;
 102         uint8_t BitStream[96];
 103         uint8_t *bs = BitStream;
 104         size_t size = sizeof(BitStream);
 105         memset(bs, 0, size);
 106
 107         uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
 108         uint64_t arg2 = 50; // clk RF/50 invert=0
 109
 110         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();
 111
 112         fcode = (fc & 0x000000FF);
 113         cnum = (cn & 0x0000FFFF);
 114
 115         if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
 116         if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
 117
 118         PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
 119         PrintAndLog("Press pm3-button to abort simulation or run another command");
 120
 121         if (!getAWIDBits(fc, cn, bs)) {
 122                 PrintAndLog("Error with tag bitstream generation.");
 123                 return 1;
 124         }
 125         // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 126         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 127         memcpy(c.d.asBytes, bs, size);
 128         clearCommandBuffer();
 129         SendCommand(&c);
 130         return 0;
 131 }
 132
 133 int CmdAWIDClone(const char *Cmd) {
 134         uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
 135         uint32_t fc=0,cn=0;
 136         uint8_t BitStream[96];
 137         uint8_t *bs=BitStream;
 138         memset(bs,0,sizeof(BitStream));
 139
 140         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();
 141
 142         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 143                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
 144
 145         if ((fc & 0xFF) != fc) {
 146                 fc &= 0xFF;
 147                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
 148         }
 149         if ((cn & 0xFFFF) != cn) {
 150                 cn &= 0xFFFF;
 151                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
 152         }
 153
 154         if ( !getAWIDBits(fc, cn, bs)) {
 155                 PrintAndLog("Error with tag bitstream generation.");
 156                 return 1;
 157         }
 158
 159         blocks[1] = bytebits_to_byte(bs,32);
 160         blocks[2] = bytebits_to_byte(bs+32,32);
 161         blocks[3] = bytebits_to_byte(bs+64,32);
 162
 163         PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",
 164             fc, cn);
 165         PrintAndLog("Blk | Data ");
 166         PrintAndLog("----+------------");
 167         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 168         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 169         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 170         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 171
 172         UsbCommand resp;
 173         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 174
 175         for (uint8_t i=0; i<4; i++) {
 176                 c.cmd = CMD_T55XX_WRITE_BLOCK;
 177                 c.arg[0] = blocks[i];
 178                 c.arg[1] = i;
 179                 c.arg[2] = 0;
 180                 clearCommandBuffer();
 181                 SendCommand(&c);
 182                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 183                         PrintAndLog("Error occurred, device did not respond during write operation.");
 184                         return -1;
 185                 }
 186
 187         }
 188         return 0;
 189 }
 190
 191 static command_t CommandTable[] = {
 192         {"help",      CmdHelp,         1, "This help"},
 193         {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},
 194         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
 195         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
 196         {NULL, NULL, 0, NULL}
 197 };
 198
 199 int CmdLFAWID(const char *Cmd) {
 200         CmdsParse(CommandTable, Cmd);
 201         return 0;
 202 }
 203
 204 int CmdHelp(const char *Cmd) {
 205         CmdsHelp(CommandTable);
 206         return 0;
 207 }