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proxmark3/client/cmdlfawid.c
marshmellow42 1c70664ae7 finish FSK graph index changes
2017-04-15 16:18:54 -04:00

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//-----------------------------------------------------------------------------
// Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
//
// cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Low frequency AWID26 commands
// FSK2a, RF/50, 96 bits (complete)
//-----------------------------------------------------------------------------
#include <string.h>
#include <stdio.h> // sscanf
#include "proxmark3.h" // Definitions, USB controls, etc
#include "cmdlfawid.h"
#include "ui.h" // PrintAndLog
#include "cmdparser.h" // CmdsParse, CmdsHelp
#include "lfdemod.h" // parityTest +
#include "util.h" // weigandparity
#include "protocols.h" // for T55xx config register definitions
#include "cmddata.h" // for printDemod and demodbuffer commands
#include "graph.h" // for getFromGraphBuff cmds
#include "cmdmain.h"
static int CmdHelp(const char *Cmd);
int usage_lf_awid_read(void) {
PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
PrintAndLog("");
PrintAndLog("Usage: lf awid read ['1']");
PrintAndLog("Options : ");
PrintAndLog(" 1 : (optional) stop after reading a single card");
PrintAndLog("");
PrintAndLog("Samples : lf awid read");
PrintAndLog(" : lf awid read 1");
return 0;
}
int usage_lf_awid_sim(void) {
PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
PrintAndLog("");
PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>");
PrintAndLog("Options : ");
PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");
PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");
PrintAndLog("");
PrintAndLog("Sample : lf awid sim 224 1337");
return 0;
}
int usage_lf_awid_clone(void) {
PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");
PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
PrintAndLog("");
PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>");
PrintAndLog("Options : ");
PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");
PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");
PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
PrintAndLog("");
PrintAndLog("Sample : lf awid clone 224 1337");
return 0;
}
int CmdAWIDReadFSK(const char *Cmd) {
int findone=0;
if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_read();
if (Cmd[0] == '1') findone = 1;
UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
clearCommandBuffer();
SendCommand(&c);
return 0;
}
//by marshmellow
//AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
//print full AWID Prox ID and some bit format details if found
int CmdFSKdemodAWID(const char *Cmd)
{
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t size = getFromGraphBuf(BitStream);
if (size==0) return 0;
int waveIdx = 0;
//get binary from fsk wave
int idx = AWIDdemodFSK(BitStream, &size, &waveIdx);
if (idx<=0){
if (g_debugMode){
if (idx == -1)
PrintAndLog("DEBUG: Error - not enough samples");
else if (idx == -2)
PrintAndLog("DEBUG: Error - only noise found");
else if (idx == -3)
PrintAndLog("DEBUG: Error - problem during FSK demod");
else if (idx == -4)
PrintAndLog("DEBUG: Error - AWID preamble not found");
else if (idx == -5)
PrintAndLog("DEBUG: Error - Size not correct: %d", size);
else
PrintAndLog("DEBUG: Error %d",idx);
}
return 0;
}
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
// -----------------------------------------------------------------------------
// 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
// premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
// |---26 bit---| |-----117----||-------------142-------------|
// b = format bit len, o = odd parity of last 3 bits
// f = facility code, c = card number
// w = wiegand parity
// (26 bit format shown)
//get raw ID before removing parities
uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
setDemodBuf(BitStream,96,idx);
setClockGrid(50, waveIdx + (idx*50));
size = removeParity(BitStream, idx+8, 4, 1, 88);
if (size != 66){
if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
return 0;
}
// ok valid card found!
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
// -----------------------------------------------------------------------------
// 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
// bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// |26 bit| |-117--| |-----142------|
// b = format bit len, o = odd parity of last 3 bits
// f = facility code, c = card number
// w = wiegand parity
// (26 bit format shown)
uint32_t fc = 0;
uint32_t cardnum = 0;
uint32_t code1 = 0;
uint32_t code2 = 0;
uint8_t fmtLen = bytebits_to_byte(BitStream,8);
if (fmtLen==26){
fc = bytebits_to_byte(BitStream+9, 8);
cardnum = bytebits_to_byte(BitStream+17, 16);
code1 = bytebits_to_byte(BitStream+8,fmtLen);
PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
} else {
cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
if (fmtLen>32){
code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
} else{
code1 = bytebits_to_byte(BitStream+8,fmtLen);
PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
}
}
if (g_debugMode){
PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
printDemodBuff();
}
//todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
return 1;
}
//refactored by marshmellow
int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t *AWIDBits) {
uint8_t pre[66];
memset(pre, 0, sizeof(pre));
AWIDBits[7]=1;
num_to_bytebits(26, 8, pre);
uint8_t wiegand[24];
num_to_bytebits(fc, 8, wiegand);
num_to_bytebits(cn, 16, wiegand+8);
wiegand_add_parity(pre+8, wiegand, 24);
size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);
if (bitLen != 88) return 0;
//for (uint8_t i = 0; i<3; i++){
// PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));
//}
return 1;
}
int CmdAWIDSim(const char *Cmd) {
uint32_t fcode = 0, cnum = 0, fc=0, cn=0;
uint8_t BitStream[96];
uint8_t *bs = BitStream;
size_t size = sizeof(BitStream);
memset(bs, 0, size);
uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
uint64_t arg2 = 50; // clk RF/50 invert=0
if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();
fcode = (fc & 0x000000FF);
cnum = (cn & 0x0000FFFF);
if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
PrintAndLog("Press pm3-button to abort simulation or run another command");
if (!getAWIDBits(fc, cn, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
}
// AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
memcpy(c.d.asBytes, bs, size);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdAWIDClone(const char *Cmd) {
uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
uint32_t fc=0,cn=0;
uint8_t BitStream[96];
uint8_t *bs=BitStream;
memset(bs,0,sizeof(BitStream));
if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();
if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1)<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
if ((fc & 0xFF) != fc) {
fc &= 0xFF;
PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
}
if ((cn & 0xFFFF) != cn) {
cn &= 0xFFFF;
PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
}
if ( !getAWIDBits(fc, cn, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
}
blocks[1] = bytebits_to_byte(bs,32);
blocks[2] = bytebits_to_byte(bs+32,32);
blocks[3] = bytebits_to_byte(bs+64,32);
PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",
fc, cn);
PrintAndLog("Blk | Data ");
PrintAndLog("----+------------");
PrintAndLog(" 00 | 0x%08x", blocks[0]);
PrintAndLog(" 01 | 0x%08x", blocks[1]);
PrintAndLog(" 02 | 0x%08x", blocks[2]);
PrintAndLog(" 03 | 0x%08x", blocks[3]);
UsbCommand resp;
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
for (uint8_t i=0; i<4; i++) {
c.cmd = CMD_T55XX_WRITE_BLOCK;
c.arg[0] = blocks[i];
c.arg[1] = i;
c.arg[2] = 0;
clearCommandBuffer();
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
PrintAndLog("Error occurred, device did not respond during write operation.");
return -1;
}
}
return 0;
}
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help"},
{"demod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from the GraphBuffer"},
{"read", CmdAWIDReadFSK, 0, "['1'] Realtime AWID FSK read from the antenna (option '1' for one tag only)"},
{"sim", CmdAWIDSim, 0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
{"clone", CmdAWIDClone, 0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
{NULL, NULL, 0, NULL}
};
int CmdLFAWID(const char *Cmd) {
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
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