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1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3 //
4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
5 // at your option, any later version. See the LICENSE.txt file for the text of
6 // the license.
7 //-----------------------------------------------------------------------------
8 // Low frequency HID commands
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include "proxusb.h"
13 #include "ui.h"
14 #include "graph.h"
15 #include "cmdparser.h"
16 #include "cmdlfhid.h"
17
18 static int CmdHelp(const char *Cmd);
19
20 int CmdHIDDemod(const char *Cmd)
21 {
22 if (GraphTraceLen < 4800) {
23 PrintAndLog("too short; need at least 4800 samples");
24 return 0;
25 }
26
27 GraphTraceLen = 4800;
28 for (int i = 0; i < GraphTraceLen; ++i) {
29 if (GraphBuffer[i] < 0) {
30 GraphBuffer[i] = 0;
31 } else {
32 GraphBuffer[i] = 1;
33 }
34 }
35 RepaintGraphWindow();
36 return 0;
37 }
38
39 int CmdHIDDemodFSK(const char *Cmd)
40 {
41 UsbCommand c={CMD_HID_DEMOD_FSK};
42 SendCommand(&c);
43 return 0;
44 }
45
46 int CmdHIDSim(const char *Cmd)
47 {
48 unsigned int hi = 0, lo = 0;
49 int n = 0, i = 0;
50
51 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
52 hi = (hi << 4) | (lo >> 28);
53 lo = (lo << 4) | (n & 0xf);
54 }
55
56 PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
57
58 UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
59 SendCommand(&c);
60 return 0;
61 }
62
63 static command_t CommandTable[] =
64 {
65 {"help", CmdHelp, 1, "This help"},
66 {"demod", CmdHIDDemod, 1, "Demodulate HID Prox Card II (not optimal)"},
67 {"fskdemod", CmdHIDDemodFSK, 0, "Realtime HID FSK demodulator"},
68 {"sim", CmdHIDSim, 0, "<ID> -- HID tag simulator"},
69 {NULL, NULL, 0, NULL}
70 };
71
72 int CmdLFHID(const char *Cmd)
73 {
74 CmdsParse(CommandTable, Cmd);
75 return 0;
76 }
77
78 int CmdHelp(const char *Cmd)
79 {
80 CmdsHelp(CommandTable);
81 return 0;
82 }
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