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1 //-----------------------------------------------------------------------------
2 //
3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
4 // at your option, any later version. See the LICENSE.txt file for the text of
5 // the license.
6 //-----------------------------------------------------------------------------
7 // Low frequency ioProx commands
8 // FSK2a, rf/64, 64 bits (complete)
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <inttypes.h>
15 #include <limits.h>
16 #include "cmdlfio.h"
17 #include "proxmark3.h"
18 #include "graph.h"
19 #include "ui.h"
20 #include "cmdparser.h"
21 #include "cmdmain.h"
22 #include "cmddata.h"
23 #include "cmdlf.h"
24 #include "lfdemod.h" //for IOdemodFSK + bytebits_to_byte
25 #include "util.h" //for sprint_bin_break
26
27 static int CmdHelp(const char *Cmd);
28
29 int CmdIOReadFSK(const char *Cmd)
30 {
31 int findone=0;
32 if(Cmd[0]=='1') findone=1;
33
34 UsbCommand c={CMD_IO_DEMOD_FSK};
35 c.arg[0]=findone;
36 SendCommand(&c);
37 return 0;
38 }
39
40 //by marshmellow
41 //IO-Prox demod - FSK RF/64 with preamble of 000000001
42 //print ioprox ID and some format details
43 int CmdFSKdemodIO(const char *Cmd)
44 {
45 int idx=0;
46 //something in graphbuffer?
47 if (GraphTraceLen < 65) {
48 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
49 return 0;
50 }
51 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
52 size_t BitLen = getFromGraphBuf(BitStream);
53 if (BitLen==0) return 0;
54
55 int waveIdx = 0;
56 //get binary from fsk wave
57 idx = IOdemodFSK(BitStream,BitLen, &waveIdx);
58 if (idx<0){
59 if (g_debugMode){
60 if (idx==-1){
61 PrintAndLog("DEBUG: Just Noise Detected");
62 } else if (idx == -2) {
63 PrintAndLog("DEBUG: not enough samples");
64 } else if (idx == -3) {
65 PrintAndLog("DEBUG: error during fskdemod");
66 } else if (idx == -4) {
67 PrintAndLog("DEBUG: Preamble not found");
68 } else if (idx == -5) {
69 PrintAndLog("DEBUG: Separator bits not found");
70 } else {
71 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
72 }
73 }
74 return 0;
75 }
76 if (idx==0){
77 if (g_debugMode){
78 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
79 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
80 }
81 return 0;
82 }
83 //Index map
84 //0 10 20 30 40 50 60
85 //| | | | | | |
86 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
87 //-----------------------------------------------------------------------------
88 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
89 //
90 //XSF(version)facility:codeone+codetwo (raw)
91 //Handle the data
92 if (idx+64>BitLen) {
93 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
94 return 0;
95 }
96 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
97 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
98 PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
99 PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
100 PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
101 PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
102 PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
103
104 uint32_t code = bytebits_to_byte(BitStream+idx,32);
105 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
106 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
107 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
108 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
109 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
110 uint16_t calccrc = 0;
111
112 for (uint8_t i=1; i<6; ++i){
113 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
114 }
115 calccrc &= 0xff;
116 calccrc = 0xff - calccrc;
117
118 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
119
120 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
121 setDemodBuf(BitStream,64,idx);
122 setClockGrid(64, waveIdx + (idx*64));
123
124 if (g_debugMode){
125 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
126 printDemodBuff();
127 }
128 return 1;
129 }
130
131 int CmdIOClone(const char *Cmd)
132 {
133 unsigned int hi = 0, lo = 0;
134 int n = 0, i = 0;
135 char ch;
136 UsbCommand c;
137
138 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
139 hi = (hi << 4) | (lo >> 28);
140 lo = (lo << 4) | (n & 0xf);
141 }
142
143 if (sscanf(&Cmd[--i], "%c", &ch) == 1) {
144 PrintAndLog("Usage: lf io clone <tag-ID>");
145 return 0;
146 }
147
148 PrintAndLog("Cloning ioProx tag with ID %08x %08x", hi, lo);
149
150 c.cmd = CMD_IO_CLONE_TAG;
151 c.arg[0] = hi;
152 c.arg[1] = lo;
153
154 SendCommand(&c);
155 return 0;
156 }
157
158 static command_t CommandTable[] =
159 {
160 {"help", CmdHelp, 1, "This help"},
161 {"demod", CmdFSKdemodIO, 1, "Demodulate IO Prox tag from the GraphBuffer"},
162 {"read", CmdIOReadFSK, 0, "['1'] Realtime IO FSK demodulate from antenna (option '1' for one tag only)"},
163 {"clone", CmdIOClone, 0, "Clone ioProx Tag"},
164 {NULL, NULL, 0, NULL}
165 };
166
167 int CmdLFIO(const char *Cmd)
168 {
169 CmdsParse(CommandTable, Cmd);
170 return 0;
171 }
172
173 int CmdHelp(const char *Cmd)
174 {
175 CmdsHelp(CommandTable);
176 return 0;
177 }
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