finish FSK graph index changes
[proxmark3-svn] / client / cmdlfhid.c
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 (known)
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include <string.h>
13 #include "cmdlfhid.h"
14 #include "proxmark3.h"
15 #include "ui.h"
16 #include "graph.h"
17 #include "cmdparser.h"
18 #include "cmddata.h" //for g_debugMode, demodbuff cmds
19 #include "lfdemod.h" // for HIDdemodFSK
20
21 static int CmdHelp(const char *Cmd);
22
23 //by marshmellow (based on existing demod + holiman's refactor)
24 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
25 //print full HID Prox ID and some bit format details if found
26 int CmdFSKdemodHID(const char *Cmd)
27 {
28 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
29 uint32_t hi2=0, hi=0, lo=0;
30
31 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
32 size_t BitLen = getFromGraphBuf(BitStream);
33 if (BitLen==0) return 0;
34 //get binary from fsk wave
35 int waveIdx = 0;
36 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo, &waveIdx);
37 if (idx<0){
38 if (g_debugMode){
39 if (idx==-1){
40 PrintAndLog("DEBUG: Just Noise Detected");
41 } else if (idx == -2) {
42 PrintAndLog("DEBUG: Error demoding fsk");
43 } else if (idx == -3) {
44 PrintAndLog("DEBUG: Preamble not found");
45 } else if (idx == -4) {
46 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
47 } else {
48 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
49 }
50 }
51 return 0;
52 }
53 if (hi2==0 && hi==0 && lo==0) {
54 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
55 return 0;
56 }
57 if (hi2 != 0){ //extra large HID tags
58 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
59 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
60 }
61 else { //standard HID tags <38 bits
62 uint8_t fmtLen = 0;
63 uint32_t fc = 0;
64 uint32_t cardnum = 0;
65 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
66 uint32_t lo2=0;
67 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
68 uint8_t idx3 = 1;
69 while(lo2>1){ //find last bit set to 1 (format len bit)
70 lo2=lo2>>1;
71 idx3++;
72 }
73 fmtLen =idx3+19;
74 fc =0;
75 cardnum=0;
76 if(fmtLen==26){
77 cardnum = (lo>>1)&0xFFFF;
78 fc = (lo>>17)&0xFF;
79 }
80 if(fmtLen==34){
81 cardnum = (lo>>1)&0xFFFF;
82 fc= ((hi&1)<<15)|(lo>>17);
83 }
84 if(fmtLen==35){
85 cardnum = (lo>>1)&0xFFFFF;
86 fc = ((hi&1)<<11)|(lo>>21);
87 }
88 }
89 else { //if bit 38 is not set then 37 bit format is used
90 fmtLen = 37;
91 fc = 0;
92 cardnum = 0;
93 if(fmtLen == 37){
94 cardnum = (lo>>1)&0x7FFFF;
95 fc = ((hi&0xF)<<12)|(lo>>20);
96 }
97 }
98 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
99 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
100 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
101 }
102 setDemodBuf(BitStream,BitLen,idx);
103 setClockGrid(50, waveIdx + (idx*50));
104 if (g_debugMode){
105 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
106 printDemodBuff();
107 }
108 return 1;
109 }
110
111 int CmdHIDReadFSK(const char *Cmd)
112 {
113 int findone=0;
114 if(Cmd[0]=='1') findone=1;
115 UsbCommand c={CMD_HID_DEMOD_FSK};
116 c.arg[0]=findone;
117 SendCommand(&c);
118 return 0;
119 }
120
121 int CmdHIDSim(const char *Cmd)
122 {
123 unsigned int hi = 0, lo = 0;
124 int n = 0, i = 0;
125
126 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
127 hi = (hi << 4) | (lo >> 28);
128 lo = (lo << 4) | (n & 0xf);
129 }
130
131 PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
132 PrintAndLog("Press pm3-button to abort simulation");
133
134 UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
135 SendCommand(&c);
136 return 0;
137 }
138
139 int CmdHIDClone(const char *Cmd)
140 {
141 unsigned int hi2 = 0, hi = 0, lo = 0;
142 int n = 0, i = 0;
143 UsbCommand c;
144
145 if (strchr(Cmd,'l') != 0) {
146 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
147 hi2 = (hi2 << 4) | (hi >> 28);
148 hi = (hi << 4) | (lo >> 28);
149 lo = (lo << 4) | (n & 0xf);
150 }
151
152 PrintAndLog("Cloning tag with long ID %x%08x%08x", hi2, hi, lo);
153
154 c.d.asBytes[0] = 1;
155 }
156 else {
157 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
158 hi = (hi << 4) | (lo >> 28);
159 lo = (lo << 4) | (n & 0xf);
160 }
161
162 PrintAndLog("Cloning tag with ID %x%08x", hi, lo);
163
164 hi2 = 0;
165 c.d.asBytes[0] = 0;
166 }
167
168 c.cmd = CMD_HID_CLONE_TAG;
169 c.arg[0] = hi2;
170 c.arg[1] = hi;
171 c.arg[2] = lo;
172
173 SendCommand(&c);
174 return 0;
175 }
176
177 static command_t CommandTable[] =
178 {
179 {"help", CmdHelp, 1, "This help"},
180 {"demod", CmdFSKdemodHID, 1, "Demodulate HID Prox from GraphBuffer"},
181 {"read", CmdHIDReadFSK, 0, "['1'] Realtime HID FSK Read from antenna (option '1' for one tag only)"},
182 {"sim", CmdHIDSim, 0, "<ID> -- HID tag simulator"},
183 {"clone", CmdHIDClone, 0, "<ID> ['l'] -- Clone HID to T55x7 (tag must be in antenna)(option 'l' for 84bit ID)"},
184 {NULL, NULL, 0, NULL}
185 };
186
187 int CmdLFHID(const char *Cmd)
188 {
189 CmdsParse(CommandTable, Cmd);
190 return 0;
191 }
192
193 int CmdHelp(const char *Cmd)
194 {
195 CmdsHelp(CommandTable);
196 return 0;
197 }
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