// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
-// Low frequency HID commands
+// Low frequency HID commands (known)
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <string.h>
-//#include "proxusb.h"
+#include "cmdlfhid.h"
#include "proxmark3.h"
#include "ui.h"
#include "graph.h"
#include "cmdparser.h"
-#include "cmdlfhid.h"
+#include "cmddata.h" //for g_debugMode, demodbuff cmds
+#include "lfdemod.h" // for HIDdemodFSK
static int CmdHelp(const char *Cmd);
-int CmdHIDDemod(const char *Cmd)
+//by marshmellow (based on existing demod + holiman's refactor)
+//HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
+//print full HID Prox ID and some bit format details if found
+int CmdFSKdemodHID(const char *Cmd)
{
- if (GraphTraceLen < 4800) {
- PrintAndLog("too short; need at least 4800 samples");
+ //raw fsk demod no manchester decoding no start bit finding just get binary from wave
+ uint32_t hi2=0, hi=0, lo=0;
+
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ size_t BitLen = getFromGraphBuf(BitStream);
+ if (BitLen==0) return 0;
+ //get binary from fsk wave
+ int waveIdx = 0;
+ int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo, &waveIdx);
+ if (idx<0){
+ if (g_debugMode){
+ if (idx==-1){
+ PrintAndLog("DEBUG: Just Noise Detected");
+ } else if (idx == -2) {
+ PrintAndLog("DEBUG: Error demoding fsk");
+ } else if (idx == -3) {
+ PrintAndLog("DEBUG: Preamble not found");
+ } else if (idx == -4) {
+ PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
+ } else {
+ PrintAndLog("DEBUG: Error demoding fsk %d", idx);
+ }
+ }
return 0;
}
-
- GraphTraceLen = 4800;
- for (int i = 0; i < GraphTraceLen; ++i) {
- if (GraphBuffer[i] < 0) {
- GraphBuffer[i] = 0;
- } else {
- GraphBuffer[i] = 1;
+ if (hi2==0 && hi==0 && lo==0) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
+ return 0;
+ }
+ if (hi2 != 0){ //extra large HID tags
+ PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
+ (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
+ }
+ else { //standard HID tags <38 bits
+ uint8_t fmtLen = 0;
+ uint32_t fc = 0;
+ uint32_t cardnum = 0;
+ if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
+ uint32_t lo2=0;
+ lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
+ uint8_t idx3 = 1;
+ while(lo2>1){ //find last bit set to 1 (format len bit)
+ lo2=lo2>>1;
+ idx3++;
+ }
+ fmtLen =idx3+19;
+ fc =0;
+ cardnum=0;
+ if(fmtLen==26){
+ cardnum = (lo>>1)&0xFFFF;
+ fc = (lo>>17)&0xFF;
+ }
+ if(fmtLen==34){
+ cardnum = (lo>>1)&0xFFFF;
+ fc= ((hi&1)<<15)|(lo>>17);
+ }
+ if(fmtLen==35){
+ cardnum = (lo>>1)&0xFFFFF;
+ fc = ((hi&1)<<11)|(lo>>21);
+ }
}
+ else { //if bit 38 is not set then 37 bit format is used
+ fmtLen = 37;
+ fc = 0;
+ cardnum = 0;
+ if(fmtLen == 37){
+ cardnum = (lo>>1)&0x7FFFF;
+ fc = ((hi&0xF)<<12)|(lo>>20);
+ }
+ }
+ PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
+ (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
+ (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
}
- RepaintGraphWindow();
- return 0;
+ setDemodBuf(BitStream,BitLen,idx);
+ setClockGrid(50, waveIdx + (idx*50));
+ if (g_debugMode){
+ PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
+ printDemodBuff();
+ }
+ return 1;
}
-int CmdHIDDemodFSK(const char *Cmd)
+int CmdHIDReadFSK(const char *Cmd)
{
+ int findone=0;
+ if(Cmd[0]=='1') findone=1;
UsbCommand c={CMD_HID_DEMOD_FSK};
+ c.arg[0]=findone;
SendCommand(&c);
return 0;
}
int CmdHIDSim(const char *Cmd)
{
- unsigned int hi = 0, lo = 0;
- int n = 0, i = 0;
+ uint32_t hi = 0, lo = 0;
+ int n = 0, i = 0;
- while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
- hi = (hi << 4) | (lo >> 28);
- lo = (lo << 4) | (n & 0xf);
- }
+ while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
+ hi = (hi << 4) | (lo >> 28);
+ lo = (lo << 4) | (n & 0xf);
+ }
- PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
+ PrintAndLog("Emulating tag with ID %x%08x", hi, lo);
+ PrintAndLog("Press pm3-button to abort simulation");
- UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
- SendCommand(&c);
- return 0;
+ UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
+ SendCommand(&c);
+ return 0;
}
int CmdHIDClone(const char *Cmd)
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
- {"demod", CmdHIDDemod, 1, "Demodulate HID Prox Card II (not optimal)"},
- {"fskdemod", CmdHIDDemodFSK, 1, "Realtime HID FSK demodulator"},
- {"sim", CmdHIDSim, 1, "<ID> -- HID tag simulator"},
- {"clone", CmdHIDClone, 1, "<ID> ['l'] -- Clone HID to T55x7 (tag must be in antenna)(option 'l' for 84bit ID)"},
+ {"demod", CmdFSKdemodHID, 1, "Demodulate HID Prox from GraphBuffer"},
+ {"read", CmdHIDReadFSK, 0, "['1'] Realtime HID FSK Read from antenna (option '1' for one tag only)"},
+ {"sim", CmdHIDSim, 0, "<ID> -- HID tag simulator"},
+ {"clone", CmdHIDClone, 0, "<ID> ['l'] -- Clone HID to T55x7 (tag must be in antenna)(option 'l' for 84bit ID)"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff