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 <string.h>
  14 #include <stdio.h>      // sscanf
  15 #include "proxmark3.h"  // Definitions, USB controls, etc
  16 #include "ui.h"         // PrintAndLog
  17 #include "cmdparser.h"  // CmdsParse, CmdsHelp
  18 #include "cmdlfawid.h"  // AWID function declarations
  19 #include "lfdemod.h"    // parityTest
  20 #include "util.h"       // weigandparity
  21 #include "protocols.h"  // for T55xx config register definitions
  22 #include "cmdmain.h"
  23
  24 static int CmdHelp(const char *Cmd);
  25
  26 int usage_lf_awid_fskdemod(void) {
  27         PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
  28         PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
  29         PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
  30         PrintAndLog("");
  31         PrintAndLog("Usage:  lf awid fskdemod ['1']");
  32         PrintAndLog("Options : ");
  33         PrintAndLog("  1 : (optional) stop after reading a single card");
  34         PrintAndLog("");
  35         PrintAndLog("Samples : lf awid fskdemod");
  36         PrintAndLog("        : lf awid fskdemod 1");
  37         return 0;
  38 }
  39
  40 int usage_lf_awid_sim(void) {
  41         PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
  42         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  43         PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  44         PrintAndLog("");
  45         PrintAndLog("Usage:  lf awid sim <Facility-Code> <Card-Number>");
  46         PrintAndLog("Options : ");
  47         PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
  48         PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
  49         PrintAndLog("");
  50         PrintAndLog("Sample : lf awid sim 224 1337");
  51         return 0;
  52 }
  53
  54 int usage_lf_awid_clone(void) {
  55         PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
  56         PrintAndLog("The T55x7 must be on the antenna when issuing this command.  T55x7 blocks are calculated and printed in the process.");
  57         PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  58         PrintAndLog("");
  59         PrintAndLog("Usage:  lf awid clone <Facility-Code> <Card-Number>");
  60         PrintAndLog("Options : ");
  61         PrintAndLog("  <Facility-Code> : 8-bit value representing the AWID facility code");
  62         PrintAndLog("  <Card Number>   : 16-bit value representing the AWID card number");
  63         PrintAndLog("  Q5              : optional - clone to Q5 (T5555) instead of T55x7 chip");
  64         PrintAndLog("");
  65         PrintAndLog("Sample  : lf awid clone 224 1337");
  66         return 0;
  67 }
  68
  69 int CmdAWIDDemodFSK(const char *Cmd) {
  70         int findone=0;
  71         if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
  72         if (Cmd[0] == '1') findone = 1;
  73
  74         UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
  75         clearCommandBuffer();
  76         SendCommand(&c);
  77         return 0;
  78 }
  79
  80 //refactored by marshmellow
  81 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t       *AWIDBits) {
  82         uint8_t pre[66];
  83         memset(pre, 0, sizeof(pre));
  84         AWIDBits[7]=1;
  85         num_to_bytebits(26, 8, pre);
  86
  87         uint8_t wiegand[24];
  88         num_to_bytebits(fc, 8, wiegand);
  89         num_to_bytebits(cn, 16, wiegand+8);
  90
  91         wiegand_add_parity(pre+8, wiegand, 24);
  92
  93         size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);
  94         if (bitLen != 88) return 0;
  95         //for (uint8_t i = 0; i<3; i++){
  96         //      PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));
  97         //}
  98         return 1;
  99 }
 100
 101 int CmdAWIDSim(const char *Cmd) {
 102         uint32_t fcode = 0, cnum = 0, fc=0, cn=0;
 103         uint8_t BitStream[96];
 104         uint8_t *bs = BitStream;
 105         size_t size = sizeof(BitStream);
 106         memset(bs, 0, size);
 107
 108         uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
 109         uint64_t arg2 = 50; // clk RF/50 invert=0
 110
 111         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();
 112
 113         fcode = (fc & 0x000000FF);
 114         cnum = (cn & 0x0000FFFF);
 115
 116         if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
 117         if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
 118
 119         PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
 120         PrintAndLog("Press pm3-button to abort simulation or run another command");
 121
 122         if (!getAWIDBits(fc, cn, bs)) {
 123                 PrintAndLog("Error with tag bitstream generation.");
 124                 return 1;
 125         }
 126         // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 127         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 128         memcpy(c.d.asBytes, bs, size);
 129         clearCommandBuffer();
 130         SendCommand(&c);
 131         return 0;
 132 }
 133
 134 int CmdAWIDClone(const char *Cmd) {
 135         uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
 136         uint32_t fc=0,cn=0;
 137         uint8_t BitStream[96];
 138         uint8_t *bs=BitStream;
 139         memset(bs,0,sizeof(BitStream));
 140
 141         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();
 142
 143         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 144                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1)<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
 145
 146         if ((fc & 0xFF) != fc) {
 147                 fc &= 0xFF;
 148                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
 149         }
 150         if ((cn & 0xFFFF) != cn) {
 151                 cn &= 0xFFFF;
 152                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
 153         }
 154
 155         if ( !getAWIDBits(fc, cn, bs)) {
 156                 PrintAndLog("Error with tag bitstream generation.");
 157                 return 1;
 158         }
 159
 160         blocks[1] = bytebits_to_byte(bs,32);
 161         blocks[2] = bytebits_to_byte(bs+32,32);
 162         blocks[3] = bytebits_to_byte(bs+64,32);
 163
 164         PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",
 165             fc, cn);
 166         PrintAndLog("Blk | Data ");
 167         PrintAndLog("----+------------");
 168         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 169         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 170         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 171         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 172
 173         UsbCommand resp;
 174         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 175
 176         for (uint8_t i=0; i<4; i++) {
 177                 c.cmd = CMD_T55XX_WRITE_BLOCK;
 178                 c.arg[0] = blocks[i];
 179                 c.arg[1] = i;
 180                 c.arg[2] = 0;
 181                 clearCommandBuffer();
 182                 SendCommand(&c);
 183                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 184                         PrintAndLog("Error occurred, device did not respond during write operation.");
 185                         return -1;
 186                 }
 187
 188         }
 189         return 0;
 190 }
 191
 192 static command_t CommandTable[] = {
 193         {"help",      CmdHelp,         1, "This help"},
 194         {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},
 195         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
 196         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
 197         {NULL, NULL, 0, NULL}
 198 };
 199
 200 int CmdLFAWID(const char *Cmd) {
 201         CmdsParse(CommandTable, Cmd);
 202         return 0;
 203 }
 204
 205 int CmdHelp(const char *Cmd) {
 206         CmdsHelp(CommandTable);
 207         return 0;
 208 }