mirror of
https://github.com/Proxmark/proxmark3.git
synced 2024-09-21 23:36:51 +08:00
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
//-----------------------------------------------------------------------------
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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 Paradox tag commands
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// FSK2a, rf/50, 96 bits (completely known)
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//-----------------------------------------------------------------------------
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include "cmdlfparadox.h"
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#include "proxmark3.h"
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#include "ui.h"
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#include "util.h"
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#include "graph.h"
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#include "cmdparser.h"
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#include "cmddata.h"
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#include "cmdlf.h"
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#include "lfdemod.h"
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static int CmdHelp(const char *Cmd);
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//by marshmellow
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//Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
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//print full Paradox Prox ID and some bit format details if found
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int CmdFSKdemodParadox(const char *Cmd)
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{
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//raw fsk demod no manchester decoding no start bit finding just get binary from wave
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uint32_t hi2=0, hi=0, lo=0;
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uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
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size_t BitLen = getFromGraphBuf(BitStream);
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if (BitLen==0) return 0;
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int waveIdx=0;
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//get binary from fsk wave
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int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo,&waveIdx);
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if (idx<0){
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if (g_debugMode){
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if (idx==-1){
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PrintAndLog("DEBUG: Just Noise Detected");
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} else if (idx == -2) {
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PrintAndLog("DEBUG: Error demoding fsk");
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} else if (idx == -3) {
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PrintAndLog("DEBUG: Preamble not found");
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} else if (idx == -4) {
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PrintAndLog("DEBUG: Error in Manchester data");
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} else {
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PrintAndLog("DEBUG: Error demoding fsk %d", idx);
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}
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}
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return 0;
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}
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if (hi2==0 && hi==0 && lo==0){
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if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
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return 0;
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}
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uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
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uint32_t cardnum = (lo>>10)&0xFFFF;
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uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
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uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
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uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
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PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
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hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
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setDemodBuf(BitStream,BitLen,idx);
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setClockGrid(50, waveIdx + (idx*50));
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if (g_debugMode){
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PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
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printDemodBuff();
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}
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return 1;
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}
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//by marshmellow
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//see ASKDemod for what args are accepted
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int CmdParadoxRead(const char *Cmd) {
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// read lf silently
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lf_read(true, 10000);
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// demod and output viking ID
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return CmdFSKdemodParadox(Cmd);
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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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{"demod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from the GraphBuffer"},
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{"read", CmdParadoxRead, 0, "Attempt to read and Extract tag data from the antenna"},
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{NULL, NULL, 0, NULL}
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};
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int CmdLFParadox(const char *Cmd) {
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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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