Adding support for AWID26 realtime demodulation as well as cloning and simulation from facility code and card number

armsrc/appmain.c

@@ -681,6 +681,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_EM4X_WRITE_WORD:
 			EM4xWriteWord(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
 			break;
+		case CMD_AWID_DEMOD_FSK: // Set realtime AWID demodulation
+			CmdAWIDdemodFSK(c->arg[0], 0, 0, 1);
+                        break;
 #endif
 
 #ifdef WITH_HITAG

armsrc/apps.h

@@ -69,6 +69,7 @@ void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream);
 void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream);
 void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol);
+void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol); // Realtime demodulation mode for AWID26
 void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol);
 void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol);
 void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT); // Clone an ioProx card to T5557/T5567

armsrc/lfops.c

@@ -399,10 +399,14 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
  #define OPEN_COIL()		HIGH(GPIO_SSC_DOUT)
 
 	i = 0;
+	byte_t rx[sizeof(UsbCommand)]; // Storage for usb_read call in loop
 	for(;;) {
 		//wait until SSC_CLK goes HIGH
 		while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
-			if(BUTTON_PRESS() || usb_poll()) {
+			// Craig Young - Adding a usb_read() here to avoid abort on empty UsbCommand
+			// My OS X client does this preventing simulation.
+			// Performance hit should be non-existent since the read is only performed if usb_poll is true
+			if(BUTTON_PRESS() || (usb_poll() && usb_read(rx,sizeof(UsbCommand)))) {
 				DbpString("Stopped");
 				return;
 			}
@@ -841,6 +845,96 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 	if (ledcontrol) LED_A_OFF();
 }
 
+// loop to get raw HID waveform then FSK demodulate the TAG ID from it
+void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
+{
+	uint8_t *dest = BigBuf_get_addr();
+	//const size_t sizeOfBigBuff = BigBuf_max_traceLen();
+	size_t size; 
+	int idx=0;
+	// Configure to go in 125Khz listen mode
+	LFSetupFPGAForADC(95, true);
+
+	while(!BUTTON_PRESS()) {
+
+		WDT_HIT();
+		if (ledcontrol) LED_A_ON();
+
+		DoAcquisition_default(-1,true);
+		// FSK demodulator
+		//size = sizeOfBigBuff;  //variable size will change after demod so re initialize it before use
+		size = 50*128*2; //big enough to catch 2 sequences of largest format
+		idx = AWIDdemodFSK(dest, &size);
+		
+		if (idx>0 && size==96){
+	        // 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(dest+idx+64,32);
+	        uint32_t rawHi = bytebits_to_byte(dest+idx+32,32);
+	        uint32_t rawHi2 = bytebits_to_byte(dest+idx,32);
+
+	        size = removeParity(dest, idx+8, 4, 1, 88);
+	        // 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(dest,8);
+	        if (fmtLen==26){
+	                fc = bytebits_to_byte(dest+9, 8);
+	                cardnum = bytebits_to_byte(dest+17, 16);
+	                code1 = bytebits_to_byte(dest+8,fmtLen);
+	                Dbprintf("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(dest+8+(fmtLen-17), 16);
+	                if (fmtLen>32){
+                        code1 = bytebits_to_byte(dest+8,fmtLen-32);
+                        code2 = bytebits_to_byte(dest+8+(fmtLen-32),32);
+                        Dbprintf("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(dest+8,fmtLen);
+                        Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
+                }
+			}
+			if (findone){
+				if (ledcontrol)	LED_A_OFF();
+				return;
+			}
+			// reset
+		}
+		idx = 0;
+		WDT_HIT();
+	}
+	DbpString("Stopped");
+	if (ledcontrol) LED_A_OFF();
+}
+
 void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 {
 	uint8_t *dest = BigBuf_get_addr();

client/Makefile

@@ -89,6 +89,7 @@ CMDSRCS = 	nonce2key/crapto1.c\
 			cmdlf.c \
 			cmdlfio.c \
 			cmdlfhid.c \
+			cmdlfawid.c \
 			cmdlfem4x.c \
 			cmdlfhitag.c \
 			cmdlfti.c \

client/cmdlfawid.c

@@ -0,0 +1,191 @@
+//-----------------------------------------------------------------------------
+// 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
+//-----------------------------------------------------------------------------
+
+#include <stdio.h>      // sscanf
+#include "proxmark3.h"  // Definitions, USB controls, etc
+#include "ui.h"         // PrintAndLog
+#include "cmdparser.h"  // CmdsParse, CmdsHelp
+#include "cmdlfawid.h"  // AWID function declarations
+#include "lfdemod.h"    // parityTest
+
+static int CmdHelp(const char *Cmd);
+
+int CmdAWIDDemodFSK(const char *Cmd)
+{
+  int findone=0;
+        if(Cmd[0]=='1') findone=1;
+  UsbCommand c={CMD_AWID_DEMOD_FSK};
+  c.arg[0]=findone;
+  SendCommand(&c);
+  return 0;   
+}
+
+int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits)
+{
+  int i;
+  uint32_t fcode=(fc & 0x000000FF), cnum=(cn & 0x0000FFFF), uBits=0;
+  if (fcode != fc)
+    PrintAndLog("NOTE: Facility code truncated for AWID26 format (8-bit facility code)");
+  if (cnum!=cn)
+    PrintAndLog("NOTE: Card number was truncated for AWID26 format (16-bit card number)");
+
+  AWIDBits[0] = 0x01; // 6-bit Preamble with 2 parity bits
+  AWIDBits[1] = 0x1D; // First byte from card format (26-bit) plus parity bits
+  AWIDBits[2] = 0x80; // Set the next two bits as 0b10 to finish card format
+  uBits = (fcode<<4) + (cnum>>12);
+  if (!parityTest(uBits,12,0))
+    AWIDBits[2] |= (1<<5); // If not already even parity, set bit to make even
+  uBits = AWIDBits[2]>>5;
+  if (!parityTest(uBits, 3, 1))
+    AWIDBits[2] |= (1<<4);
+  uBits = fcode>>5; // first 3 bits of facility-code
+  AWIDBits[2] += (uBits<<1);
+  if (!parityTest(uBits, 3, 1))
+    AWIDBits[2]++; // Set parity bit to make odd parity
+  uBits = (fcode & 0x1C)>>2;
+  AWIDBits[3] = 0;
+  if (!parityTest(uBits,3,1))
+    AWIDBits[3] |= (1<<4);
+  AWIDBits[3] += (uBits<<5);
+  uBits = ((fcode & 0x3)<<1) + ((cnum & 0x8000)>>15); // Grab/shift 2 LSBs from facility code and add shifted MSB from cardnum
+  if (!parityTest(uBits,3,1))
+    AWIDBits[3]++; // Set LSB for parity
+  AWIDBits[3]+= (uBits<<1);
+  uBits = (cnum & 0x7000)>>12;
+  AWIDBits[4] = uBits<<5;
+  if (!parityTest(uBits,3,1))
+    AWIDBits[4] |= (1<<4);
+  uBits = (cnum & 0x0E00)>>9;
+  AWIDBits[4] += (uBits<<1);
+  if (!parityTest(uBits,3,1))
+    AWIDBits[4]++; // Set LSB for parity
+  uBits = (cnum & 0x1C0)>>6; // Next bits from card number
+  AWIDBits[5]=(uBits<<5);
+  if (!parityTest(uBits,3,1))
+    AWIDBits[5] |= (1<<4); // Set odd parity bit as needed
+  uBits = (cnum & 0x38)>>3;
+  AWIDBits[5]+= (uBits<<1);
+  if (!parityTest(uBits,3,1))
+    AWIDBits[5]++; // Set odd parity bit as needed
+  uBits = (cnum & 0x7); // Last three bits from card number!
+  AWIDBits[6] = (uBits<<5);
+  if (!parityTest(uBits,3,1))
+    AWIDBits[6] |= (1<<4);
+  uBits = (cnum & 0x0FFF);
+  if (!parityTest(uBits,12,1))
+    AWIDBits[6] |= (1<<3);
+  else
+    AWIDBits[6]++;
+  for (i = 7; i<12; i++)
+    AWIDBits[i]=0x11;
+  return 1;
+}
+
+int CmdAWIDSim(const char *Cmd)
+{
+  uint32_t fcode = 0, cnum = 0, fc=0, cn=0, i=0;
+  uint8_t *BS, BitStream[12];
+  uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
+  uint64_t arg2 = 50; // clk RF/50 invert=0
+  BS = BitStream;
+  if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
+    PrintAndLog("Usage: lf awid sim <facility-code> <card number>");
+    return 0;
+  }
+
+  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");
+  // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
+  if (getAWIDBits(fc, cn, BS)) {
+      PrintAndLog("Running 'lf simfsk c 50 H 10 L 8 d %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'", 
+                                        BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],
+                                        BS[7],BS[8],BS[9],BS[10],BS[11]);
+    } else
+      PrintAndLog("Error with tag bitstream generation.");
+  UsbCommand c;
+  c.cmd = CMD_FSK_SIM_TAG;
+  c.arg[0] = arg1; // fcHigh<<8 + fcLow
+  c.arg[1] = arg2; // Inversion and clk setting
+  c.arg[2] = 96; // Bitstream length: 96-bits == 12 bytes
+  for (i=0; i < 96; i++)
+    c.d.asBytes[i] = (BS[i/8] & (1<<(7-(i%8))))?1:0;
+  SendCommand(&c);
+  return 0;
+}
+
+int CmdAWIDClone(const char *Cmd)
+{
+  uint32_t fc=0,cn=0,blocks[4] = {0x00107060, 0, 0, 0x11111111}, i=0;
+  uint8_t BitStream[12];
+  uint8_t *BS=BitStream;
+  UsbCommand c;
+  
+
+  if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) {
+    PrintAndLog("Usage: lf awid clone <facility-code> <card number>");
+    return 0;
+  }
+
+  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("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u (Raw: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x)", 
+                  fc,cn, BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],BS[7],BS[8],BS[9],BS[10],BS[11]);
+    blocks[1] = (BS[0]<<24) + (BS[1]<<16) + (BS[2]<<8) + (BS[3]);
+    blocks[2] = (BS[4]<<24) + (BS[5]<<16) + (BS[6]<<8) + (BS[7]);
+    PrintAndLog("Block 0: 0x%08x", blocks[0]);
+    PrintAndLog("Block 1: 0x%08x", blocks[1]);
+    PrintAndLog("Block 2: 0x%08x", blocks[2]);
+    PrintAndLog("Block 3: 0x%08x", blocks[3]);
+    for (i=0; i<4; i++) {
+      c.cmd = CMD_T55XX_WRITE_BLOCK;
+      c.arg[0] = blocks[i];
+      c.arg[1] = i;
+      c.arg[2] = 0;
+      SendCommand(&c);
+    }
+  }
+  return 0;
+}
+
+static command_t CommandTable[] = 
+{
+  {"help",      CmdHelp,        1, "This help"},
+  {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},
+  {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
+  {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> -- 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;
+}

client/cmdlfawid.h

@@ -0,0 +1,21 @@
+//-----------------------------------------------------------------------------
+// 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 AWID commands
+//-----------------------------------------------------------------------------
+
+#ifndef CMDLFAWID_H__
+#define CMDLFAWID_H__
+
+int CmdLFAWID(const char *Cmd);
+//int CmdAWIDDemod(const char *Cmd);
+int CmdAWIDDemodFSK(const char *Cmd);
+int CmdAWIDSim(const char *Cmd);
+int CmdAWIDClone(const char *Cmd);
+int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits);
+
+#endif

client/hid-flasher/usb_cmd.h

@@ -84,6 +84,7 @@ typedef struct {
 #define CMD_FSK_SIM_TAG                                                   0x021E
 #define CMD_ASK_SIM_TAG                                                   0x021F
 #define CMD_PSK_SIM_TAG                                                   0x0220
+#define CMD_AWID_DEMOD_FSK                                                0x0221
 
 /* CMD_SET_ADC_MUX: ext1 is 0 for lopkd, 1 for loraw, 2 for hipkd, 3 for hiraw */
 

include/usb_cmd.h

@@ -95,6 +95,7 @@ typedef struct{
 #define CMD_FSK_SIM_TAG                                                   0x021E
 #define CMD_ASK_SIM_TAG                                                   0x021F
 #define CMD_PSK_SIM_TAG                                                   0x0220
+#define CMD_AWID_DEMOD_FSK                                                0x0221
 
 /* CMD_SET_ADC_MUX: ext1 is 0 for lopkd, 1 for loraw, 2 for hipkd, 3 for hiraw */