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438 lines
13 KiB
C
438 lines
13 KiB
C
//-----------------------------------------------------------------------------
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// Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
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//
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// cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Low frequency AWID26/50 commands
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//-----------------------------------------------------------------------------
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#include "cmdlfawid.h" // AWID function declarations
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static int CmdHelp(const char *Cmd);
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int usage_lf_awid_fskdemod(void) {
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PrintAndLog("Enables AWID compatible reader mode printing details of scanned AWID26 or AWID50 tags.");
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PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
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PrintAndLog("If the [1] option is provided, reader mode is exited after reading a single AWID card.");
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PrintAndLog("");
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PrintAndLog("Usage: lf awid fskdemod [h] [1]");
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PrintAndLog("Options:");
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PrintAndLog(" h : This help");
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PrintAndLog(" 1 : (optional) stop after reading a single card");
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PrintAndLog("");
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PrintAndLog("Samples:");
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PrintAndLog(" lf awid fskdemod");
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PrintAndLog(" lf awid fskdemod 1");
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return 0;
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}
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int usage_lf_awid_sim(void) {
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PrintAndLog("Enables simulation of AWID card with specified facility-code and card number.");
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PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
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PrintAndLog("");
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PrintAndLog("Usage: lf awid sim [h] <format> <facility-code> <card-number>");
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PrintAndLog("Options:");
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PrintAndLog(" h : This help");
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PrintAndLog(" <format> : format length 26|34|37|50");
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PrintAndLog(" <facility-code> : 8|16bit value facility code");
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PrintAndLog(" <card number> : 16|32-bit value card number");
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PrintAndLog("");
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PrintAndLog("Samples:");
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PrintAndLog(" lf awid sim 26 224 1337");
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PrintAndLog(" lf awid sim 50 2001 13371337");
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return 0;
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}
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int usage_lf_awid_clone(void) {
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PrintAndLog("Enables cloning of AWID card with specified facility-code and card number onto T55x7.");
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PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");
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PrintAndLog("");
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PrintAndLog("Usage: lf awid clone [h] <format> <facility-code> <card-number> [Q5]");
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PrintAndLog("Options:");
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PrintAndLog(" h : This help");
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PrintAndLog(" <format> : format length 26|34|37|50");
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PrintAndLog(" <facility-code> : 8|16bit value facility code");
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PrintAndLog(" <card number> : 16|32-bit value card number");
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PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
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PrintAndLog("");
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PrintAndLog("Samples:");
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PrintAndLog(" lf awid clone 26 224 1337");
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PrintAndLog(" lf awid clone 50 2001 13371337");
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return 0;
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}
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int usage_lf_awid_brute(void){
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PrintAndLog("Enables bruteforce of AWID reader with specified facility-code.");
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PrintAndLog("This is a attack against reader. if cardnumber is given, it starts with it and goes up / down one step");
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PrintAndLog("if cardnumber is not given, it starts with 1 and goes up to 65535");
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PrintAndLog("");
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PrintAndLog("Usage: lf awid brute [h] a <format> f <facility-code> c <cardnumber> d <delay>");
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PrintAndLog("Options:");
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PrintAndLog(" h : This help");
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PrintAndLog(" a <format> : format length 26|50");
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PrintAndLog(" f <facility-code> : 8|16bit value facility code");
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PrintAndLog(" c <cardnumber> : (optional) cardnumber to start with, max 65535");
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PrintAndLog(" d <delay> : delay betweens attempts in ms. Default 1000ms");
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PrintAndLog("");
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PrintAndLog("Samples:");
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PrintAndLog(" lf awid brute a 26 f 224");
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PrintAndLog(" lf awid brute a 50 f 2001 d 2000");
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PrintAndLog(" lf awid brute a 50 f 2001 c 200 d 2000");
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return 0;
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}
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static int sendPing(void){
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UsbCommand ping = {CMD_PING, {1, 2, 3}};
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SendCommand(&ping);
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SendCommand(&ping);
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SendCommand(&ping);
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clearCommandBuffer();
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UsbCommand resp;
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if (WaitForResponseTimeout(CMD_ACK, &resp, 1000))
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return 0;
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return 1;
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}
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static bool sendTry(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint32_t delay, uint8_t *bs, size_t bs_len){
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PrintAndLog("Trying FC: %u; CN: %u", fc, cn);
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if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
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PrintAndLog("Error with tag bitstream generation.");
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return FALSE;
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}
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uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
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uint64_t arg2 = 50; // clk RF/50 invert=0
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UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, bs_len}};
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memcpy(c.d.asBytes, bs, bs_len);
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clearCommandBuffer();
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SendCommand(&c);
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msleep(delay);
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sendPing();
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return TRUE;
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}
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int CmdAWIDDemodFSK(const char *Cmd) {
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if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
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uint8_t findone = (Cmd[0] == '1') ? 1 : 0;
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UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
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clearCommandBuffer();
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SendCommand(&c);
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return 0;
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}
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int CmdAWIDRead(const char *Cmd) {
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CmdLFRead("s");
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getSamples("12000", TRUE);
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return CmdFSKdemodAWID(Cmd);
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}
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//refactored by marshmellow
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int getAWIDBits(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint8_t *bits) {
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// the return bits, preamble 0000 0001
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bits[7] = 1;
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uint8_t pre[66];
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memset(pre, 0, sizeof(pre));
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// add formatlength
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num_to_bytebits(fmtlen, 8, pre);
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// add facilitycode, cardnumber and wiegand parity bits
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switch (fmtlen) {
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case 26:{
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uint8_t wiegand[24];
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num_to_bytebits(fc, 8, wiegand);
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num_to_bytebits(cn, 16, wiegand+8);
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wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
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break;
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}
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case 34:{
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uint8_t wiegand[32];
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num_to_bytebits(fc, 8, wiegand);
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num_to_bytebits(cn, 24, wiegand+8);
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wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
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break;
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}
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case 37:{
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uint8_t wiegand[31];
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num_to_bytebits(fc, 13, wiegand);
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num_to_bytebits(cn, 18, wiegand+13);
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wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
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break;
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}
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case 50: {
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uint8_t wiegand[48];
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num_to_bytebits(fc, 16, wiegand);
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num_to_bytebits(cn, 32, wiegand+16);
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wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
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break;
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}
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}
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// add AWID 4bit parity
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size_t bitLen = addParity(pre, bits+8, 66, 4, 1);
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if (bitLen != 88) return 0;
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return 1;
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}
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static void verify_values(uint8_t *fmtlen, uint32_t *fc, uint32_t *cn){
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switch (*fmtlen) {
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case 50:
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if ((*fc & 0xFFFF) != *fc) {
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*fc &= 0xFFFF;
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PrintAndLog("Facility-Code Truncated to 16-bits (AWID50): %u", *fc);
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}
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break;
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case 37:
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if ((*fc & 0x1FFF) != *fc) {
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*fc &= 0x1FFF;
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PrintAndLog("Facility-Code Truncated to 13-bits (AWID37): %u", *fc);
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}
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if ((*cn & 0x3FFFF) != *cn) {
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*cn &= 0x3FFFF;
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PrintAndLog("Card Number Truncated to 18-bits (AWID37): %u", *cn);
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}
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break;
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case 34:
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if ((*fc & 0xFF) != *fc) {
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*fc &= 0xFF;
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PrintAndLog("Facility-Code Truncated to 8-bits (AWID34): %u", *fc);
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}
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if ((*cn & 0xFFFFFF) != *cn) {
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*cn &= 0xFFFFFF;
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PrintAndLog("Card Number Truncated to 24-bits (AWID34): %u", *cn);
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}
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break;
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case 26:
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default:
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*fmtlen = 26;
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if ((*fc & 0xFF) != *fc) {
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*fc &= 0xFF;
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PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", *fc);
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}
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if ((*cn & 0xFFFF) != *cn) {
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*cn &= 0xFFFF;
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PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", *cn);
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}
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break;
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}
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}
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int CmdAWIDSim(const char *Cmd) {
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uint32_t fc = 0, cn = 0;
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uint8_t fmtlen = 0;
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uint8_t bits[96];
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uint8_t *bs = bits;
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size_t size = sizeof(bits);
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memset(bs, 0x00, size);
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uint64_t arg1 = ( 10 << 8 ) + 8; // fcHigh = 10, fcLow = 8
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uint64_t arg2 = 50; // clk RF/50 invert=0
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char cmdp = param_getchar(Cmd, 0);
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if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_sim();
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fmtlen = param_get8(Cmd, 0);
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fc = param_get32ex(Cmd, 1, 0, 10);
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cn = param_get32ex(Cmd, 2, 0, 10);
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if ( !fc || !cn) return usage_lf_awid_sim();
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verify_values(&fmtlen, &fc, &cn);
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PrintAndLog("Emulating AWID %u -- FC: %u; CN: %u\n", fmtlen, fc, cn);
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PrintAndLog("Press pm3-button to abort simulation or run another command");
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if (!getAWIDBits(fmtlen, fc, cn, bs)) {
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PrintAndLog("Error with tag bitstream generation.");
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return 1;
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}
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// AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
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// arg1 --- fcHigh<<8 + fcLow
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// arg2 --- Inversion and clk setting
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// 96 --- Bitstream length: 96-bits == 12 bytes
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UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
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memcpy(c.d.asBytes, bs, size);
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clearCommandBuffer();
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SendCommand(&c);
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return 0;
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}
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int CmdAWIDClone(const char *Cmd) {
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uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
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uint32_t fc = 0, cn = 0;
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uint8_t fmtlen = 0;
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uint8_t bits[96];
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uint8_t *bs=bits;
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memset(bs,0,sizeof(bits));
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char cmdp = param_getchar(Cmd, 0);
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if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_clone();
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fmtlen = param_get8(Cmd, 0);
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fc = param_get32ex(Cmd, 1, 0, 10);
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cn = param_get32ex(Cmd, 2, 0, 10);
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if ( !fc || !cn) return usage_lf_awid_clone();
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if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
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//t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
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blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1) << T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
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verify_values(&fmtlen, &fc, &cn);
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if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
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PrintAndLog("Error with tag bitstream generation.");
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return 1;
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}
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blocks[1] = bytebits_to_byte(bs,32);
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blocks[2] = bytebits_to_byte(bs+32,32);
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blocks[3] = bytebits_to_byte(bs+64,32);
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PrintAndLog("Preparing to clone AWID %u to T55x7 with FC: %u, CN: %u", fmtlen, fc, cn);
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PrintAndLog("Blk | Data ");
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PrintAndLog("----+------------");
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PrintAndLog(" 00 | 0x%08x", blocks[0]);
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PrintAndLog(" 01 | 0x%08x", blocks[1]);
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PrintAndLog(" 02 | 0x%08x", blocks[2]);
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PrintAndLog(" 03 | 0x%08x", blocks[3]);
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UsbCommand resp;
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UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
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for (uint8_t i=0; i<4; i++) {
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c.arg[0] = blocks[i];
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c.arg[1] = i;
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clearCommandBuffer();
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SendCommand(&c);
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if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
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PrintAndLog("Error occurred, device did not respond during write operation.");
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return -1;
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}
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}
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return 0;
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}
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int CmdAWIDBrute(const char *Cmd){
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bool errors = false;
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uint32_t fc = 0, cn = 0, delay = 1000;
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uint8_t fmtlen = 0;
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uint8_t bits[96];
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uint8_t *bs = bits;
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size_t size = sizeof(bits);
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memset(bs, 0x00, size);
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uint8_t cmdp = 0;
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while(param_getchar(Cmd, cmdp) != 0x00 && !errors) {
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switch(param_getchar(Cmd, cmdp)) {
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case 'h':
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case 'H':
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return usage_lf_awid_brute();
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case 'f':
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case 'F':
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fc = param_get32ex(Cmd ,cmdp+1, 0, 10);
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if ( !fc )
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errors = true;
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cmdp += 2;
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break;
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case 'd':
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case 'D':
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// delay between attemps, defaults to 1000ms.
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delay = param_get32ex(Cmd, cmdp+1, 1000, 10);
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cmdp += 2;
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break;
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case 'c':
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case 'C':
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cn = param_get32ex(Cmd, cmdp+1, 0, 10);
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// truncate cardnumber.
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cn &= 0xFFFF;
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cmdp += 2;
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break;
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case 'a':
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case 'A':
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fmtlen = param_get8(Cmd, cmdp+1);
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cmdp += 2;
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break;
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default:
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PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = true;
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break;
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}
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}
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if ( fc == 0 )errors = true;
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if ( errors ) return usage_lf_awid_brute();
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// limit fc according to selected format
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switch(fmtlen) {
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case 50:
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if ((fc & 0xFFFF) != fc) {
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fc &= 0xFFFF;
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PrintAndLog("Facility-code truncated to 16-bits (AWID50): %u", fc);
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}
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break;
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default:
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if ((fc & 0xFF) != fc) {
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fc &= 0xFF;
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PrintAndLog("Facility-code truncated to 8-bits (AWID26): %u", fc);
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}
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break;
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}
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PrintAndLog("Bruteforceing AWID %d Reader", fmtlen);
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PrintAndLog("Press pm3-button to abort simulation or press key");
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uint16_t up = cn;
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uint16_t down = cn;
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for (;;){
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if ( offline ) {
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printf("Device offline\n");
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return 2;
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}
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if (ukbhit()) {
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PrintAndLog("aborted via keyboard!");
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return sendPing();
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}
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// Do one up
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if ( up < 0xFFFF )
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if ( !sendTry(fmtlen, fc, up++, delay, bs, size)) return 1;
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// Do one down (if cardnumber is given)
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if ( cn > 1 )
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if ( down > 1 )
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if ( !sendTry(fmtlen, fc, --down, delay, bs, size)) return 1;
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}
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return 0;
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}
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static command_t CommandTable[] = {
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{"help", CmdHelp, 1, "This help"},
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{"fskdemod", CmdAWIDDemodFSK, 0, "Realtime AWID FSK demodulator"},
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{"read", CmdAWIDRead, 0, "Attempt to read and extract tag data"},
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{"sim", CmdAWIDSim, 0, "AWID tag simulator"},
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{"clone", CmdAWIDClone, 0, "Clone AWID to T55x7"},
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{"brute", CmdAWIDBrute, 0, "Bruteforce card number against reader"},
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{NULL, NULL, 0, NULL}
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};
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int CmdLFAWID(const char *Cmd) {
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clearCommandBuffer();
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CmdsParse(CommandTable, Cmd);
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return 0;
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}
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int CmdHelp(const char *Cmd) {
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CmdsHelp(CommandTable);
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return 0;
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}
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