mirror of
https://github.com/Proxmark/proxmark3.git
synced 2024-09-20 23:06:25 +08:00
ad939de501
* make uart_communication(), storeCommand() and getCommand() static in comms.c * move receiver thread creation and respective mutexes to comms.c * add mutex and signal for tx buffer * use comms.c for flasher as well * remove comm functions from client/proxmark3.h * this completes isolating all USB communication related functions in comms.c * don't assume a port to be defined by a name. Change parameter in OpenProxmark() to void* * comms.c: set sp and serial_port_name to NULL when offline
103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
//-----------------------------------------------------------------------------
|
|
//
|
|
// 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 Stanley/PAC tag commands
|
|
// NRZ, RF/32, 128 bits long (unknown cs)
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "cmdlfpac.h"
|
|
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
#include "comms.h"
|
|
#include "ui.h"
|
|
#include "util.h"
|
|
#include "graph.h"
|
|
#include "cmdparser.h"
|
|
#include "cmddata.h"
|
|
#include "cmdmain.h"
|
|
#include "cmdlf.h"
|
|
#include "lfdemod.h" // preamble test
|
|
|
|
static int CmdHelp(const char *Cmd);
|
|
|
|
// by marshmellow
|
|
// find PAC preamble in already demoded data
|
|
int PacFind(uint8_t *dest, size_t *size) {
|
|
if (*size < 128) return -1; //make sure buffer has data
|
|
size_t startIdx = 0;
|
|
uint8_t preamble[] = {1,1,1,1,1,1,1,1,0,0,1,0,0,0,0,0,0,1,0};
|
|
if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx))
|
|
return -2; //preamble not found
|
|
if (*size != 128) return -3; //wrong demoded size
|
|
//return start position
|
|
return (int)startIdx;
|
|
}
|
|
|
|
//see NRZDemod for what args are accepted
|
|
int CmdPacDemod(const char *Cmd) {
|
|
|
|
//NRZ
|
|
if (!NRZrawDemod(Cmd, false)) {
|
|
if (g_debugMode) PrintAndLog("DEBUG: Error - PAC: NRZ Demod failed");
|
|
return 0;
|
|
}
|
|
size_t size = DemodBufferLen;
|
|
int ans = PacFind(DemodBuffer, &size);
|
|
if (ans < 0) {
|
|
if (g_debugMode) {
|
|
if (ans == -1)
|
|
PrintAndLog("DEBUG: Error - PAC: too few bits found");
|
|
else if (ans == -2)
|
|
PrintAndLog("DEBUG: Error - PAC: preamble not found");
|
|
else if (ans == -3)
|
|
PrintAndLog("DEBUG: Error - PAC: Size not correct: %d", size);
|
|
else
|
|
PrintAndLog("DEBUG: Error - PAC: ans: %d", ans);
|
|
}
|
|
return 0;
|
|
}
|
|
setDemodBuf(DemodBuffer, 128, ans);
|
|
setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
|
|
|
|
//got a good demod
|
|
uint32_t raw1 = bytebits_to_byte(DemodBuffer , 32);
|
|
uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
|
|
uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
|
|
uint32_t raw4 = bytebits_to_byte(DemodBuffer+96, 32);
|
|
|
|
// preamble then appears to have marker bits of "10" CS?
|
|
// 11111111001000000 10 01001100 10 00001101 10 00001101 10 00001101 10 00001101 10 00001101 10 00001101 10 00001101 10 00001101 10 10001100 10 100000001
|
|
// unknown checksum 9 bits at the end
|
|
|
|
PrintAndLog("PAC/Stanley Tag Found -- Raw: %08X%08X%08X%08X", raw1 ,raw2, raw3, raw4);
|
|
PrintAndLog("\nHow the Raw ID is translated by the reader is unknown");
|
|
return 1;
|
|
}
|
|
|
|
int CmdPacRead(const char *Cmd) {
|
|
lf_read(true, 4096*2 + 20);
|
|
return CmdPacDemod(Cmd);
|
|
}
|
|
|
|
static command_t CommandTable[] = {
|
|
{"help", CmdHelp, 1, "This help"},
|
|
{"demod", CmdPacDemod,1, "Attempt to read and extract tag data from the GraphBuffer"},
|
|
{"read", CmdPacRead, 0, "Attempt to read and extract tag data from the antenna"},
|
|
{NULL, NULL, 0, NULL}
|
|
};
|
|
|
|
int CmdLFPac(const char *Cmd) {
|
|
clearCommandBuffer();
|
|
CmdsParse(CommandTable, Cmd);
|
|
return 0;
|
|
}
|
|
|
|
int CmdHelp(const char *Cmd) {
|
|
CmdsHelp(CommandTable);
|
|
return 0;
|
|
}
|