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1 //-----------------------------------------------------------------------------
2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
3 //
4 // cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
5 //
6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
7 // at your option, any later version. See the LICENSE.txt file for the text of
8 // the license.
9 //-----------------------------------------------------------------------------
10 // Low frequency AWID26 commands
11 // FSK2a, RF/50, 96 bits (complete)
12 //-----------------------------------------------------------------------------
13
14 #include "cmdlfawid.h"
15
16 #include <string.h>
17 #include <stdio.h> // sscanf
18 #include "comms.h" // Definitions, USB controls, etc
19 #include "ui.h" // PrintAndLog
20 #include "cmdparser.h" // CmdsParse, CmdsHelp
21 #include "lfdemod.h" // parityTest +
22 #include "util.h" // weigandparity
23 #include "protocols.h" // for T55xx config register definitions
24 #include "cmddata.h" // for printDemod and demodbuffer commands
25 #include "graph.h" // for getFromGraphBuff cmds
26 #include "cmdmain.h"
27
28 static int CmdHelp(const char *Cmd);
29
30 int usage_lf_awid_read(void) {
31 PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
32 PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
33 PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
34 PrintAndLog("");
35 PrintAndLog("Usage: lf awid read ['1']");
36 PrintAndLog("Options : ");
37 PrintAndLog(" 1 : (optional) stop after reading a single card");
38 PrintAndLog("");
39 PrintAndLog("Samples : lf awid read");
40 PrintAndLog(" : lf awid read 1");
41 return 0;
42 }
43
44 int usage_lf_awid_sim(void) {
45 PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
46 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
47 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
48 PrintAndLog("");
49 PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>");
50 PrintAndLog("Options : ");
51 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");
52 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");
53 PrintAndLog("");
54 PrintAndLog("Sample : lf awid sim 224 1337");
55 return 0;
56 }
57
58 int usage_lf_awid_clone(void) {
59 PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
60 PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");
61 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
62 PrintAndLog("");
63 PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>");
64 PrintAndLog("Options : ");
65 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");
66 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");
67 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
68 PrintAndLog("");
69 PrintAndLog("Sample : lf awid clone 224 1337");
70 return 0;
71 }
72
73 int CmdAWIDReadFSK(const char *Cmd) {
74 int findone=0;
75 if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_read();
76 if (Cmd[0] == '1') findone = 1;
77
78 UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
79 clearCommandBuffer();
80 SendCommand(&c);
81 return 0;
82 }
83 //by marshmellow
84 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
85 //print full AWID Prox ID and some bit format details if found
86 int CmdFSKdemodAWID(const char *Cmd)
87 {
88 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
89 size_t size = getFromGraphBuf(BitStream);
90 if (size==0) return 0;
91
92 int waveIdx = 0;
93 //get binary from fsk wave
94 int idx = AWIDdemodFSK(BitStream, &size, &waveIdx);
95 if (idx<=0){
96 if (g_debugMode){
97 if (idx == -1)
98 PrintAndLog("DEBUG: Error - not enough samples");
99 else if (idx == -2)
100 PrintAndLog("DEBUG: Error - only noise found");
101 else if (idx == -3)
102 PrintAndLog("DEBUG: Error - problem during FSK demod");
103 else if (idx == -4)
104 PrintAndLog("DEBUG: Error - AWID preamble not found");
105 else if (idx == -5)
106 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
107 else
108 PrintAndLog("DEBUG: Error %d",idx);
109 }
110 return 0;
111 }
112
113 // Index map
114 // 0 10 20 30 40 50 60
115 // | | | | | | |
116 // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
117 // -----------------------------------------------------------------------------
118 // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
119 // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
120 // |---26 bit---| |-----117----||-------------142-------------|
121 // b = format bit len, o = odd parity of last 3 bits
122 // f = facility code, c = card number
123 // w = wiegand parity
124 // (26 bit format shown)
125
126 //get raw ID before removing parities
127 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
128 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
129 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
130 setDemodBuf(BitStream,96,idx);
131 setClockGrid(50, waveIdx + (idx*50));
132
133 size = removeParity(BitStream, idx+8, 4, 1, 88);
134 if (size != 66){
135 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
136 return 0;
137 }
138 // ok valid card found!
139
140 // Index map
141 // 0 10 20 30 40 50 60
142 // | | | | | | |
143 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
144 // -----------------------------------------------------------------------------
145 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
146 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
147 // |26 bit| |-117--| |-----142------|
148 // b = format bit len, o = odd parity of last 3 bits
149 // f = facility code, c = card number
150 // w = wiegand parity
151 // (26 bit format shown)
152
153 uint32_t fc = 0;
154 uint32_t cardnum = 0;
155 uint32_t code1 = 0;
156 uint32_t code2 = 0;
157 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
158 if (fmtLen==26){
159 fc = bytebits_to_byte(BitStream+9, 8);
160 cardnum = bytebits_to_byte(BitStream+17, 16);
161 code1 = bytebits_to_byte(BitStream+8,fmtLen);
162 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
163 } else {
164 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
165 if (fmtLen>32){
166 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
167 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
168 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
169 } else{
170 code1 = bytebits_to_byte(BitStream+8,fmtLen);
171 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
172 }
173 }
174 if (g_debugMode){
175 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
176 printDemodBuff();
177 }
178 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
179 return 1;
180 }
181
182 //refactored by marshmellow
183 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t *AWIDBits) {
184 uint8_t pre[66];
185 memset(pre, 0, sizeof(pre));
186 AWIDBits[7]=1;
187 num_to_bytebits(26, 8, pre);
188
189 uint8_t wiegand[24];
190 num_to_bytebits(fc, 8, wiegand);
191 num_to_bytebits(cn, 16, wiegand+8);
192
193 wiegand_add_parity(pre+8, wiegand, 24);
194
195 size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);
196 if (bitLen != 88) return 0;
197 //for (uint8_t i = 0; i<3; i++){
198 // PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));
199 //}
200 return 1;
201 }
202
203 int CmdAWIDSim(const char *Cmd) {
204 uint32_t fcode = 0, cnum = 0, fc=0, cn=0;
205 uint8_t BitStream[96];
206 uint8_t *bs = BitStream;
207 size_t size = sizeof(BitStream);
208 memset(bs, 0, size);
209
210 uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
211 uint64_t arg2 = 50; // clk RF/50 invert=0
212
213 if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();
214
215 fcode = (fc & 0x000000FF);
216 cnum = (cn & 0x0000FFFF);
217
218 if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
219 if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
220
221 PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
222 PrintAndLog("Press pm3-button to abort simulation or run another command");
223
224 if (!getAWIDBits(fc, cn, bs)) {
225 PrintAndLog("Error with tag bitstream generation.");
226 return 1;
227 }
228 // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
229 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
230 memcpy(c.d.asBytes, bs, size);
231 clearCommandBuffer();
232 SendCommand(&c);
233 return 0;
234 }
235
236 int CmdAWIDClone(const char *Cmd) {
237 uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
238 uint32_t fc=0,cn=0;
239 uint8_t BitStream[96];
240 uint8_t *bs=BitStream;
241 memset(bs,0,sizeof(BitStream));
242
243 if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();
244
245 if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
246 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1)<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
247
248 if ((fc & 0xFF) != fc) {
249 fc &= 0xFF;
250 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
251 }
252 if ((cn & 0xFFFF) != cn) {
253 cn &= 0xFFFF;
254 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
255 }
256
257 if ( !getAWIDBits(fc, cn, bs)) {
258 PrintAndLog("Error with tag bitstream generation.");
259 return 1;
260 }
261
262 blocks[1] = bytebits_to_byte(bs,32);
263 blocks[2] = bytebits_to_byte(bs+32,32);
264 blocks[3] = bytebits_to_byte(bs+64,32);
265
266 PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",
267 fc, cn);
268 PrintAndLog("Blk | Data ");
269 PrintAndLog("----+------------");
270 PrintAndLog(" 00 | 0x%08x", blocks[0]);
271 PrintAndLog(" 01 | 0x%08x", blocks[1]);
272 PrintAndLog(" 02 | 0x%08x", blocks[2]);
273 PrintAndLog(" 03 | 0x%08x", blocks[3]);
274
275 UsbCommand resp;
276 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
277
278 for (uint8_t i=0; i<4; i++) {
279 c.cmd = CMD_T55XX_WRITE_BLOCK;
280 c.arg[0] = blocks[i];
281 c.arg[1] = i;
282 c.arg[2] = 0;
283 clearCommandBuffer();
284 SendCommand(&c);
285 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
286 PrintAndLog("Error occurred, device did not respond during write operation.");
287 return -1;
288 }
289
290 }
291 return 0;
292 }
293
294 static command_t CommandTable[] = {
295 {"help", CmdHelp, 1, "This help"},
296 {"demod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from the GraphBuffer"},
297 {"read", CmdAWIDReadFSK, 0, "['1'] Realtime AWID FSK read from the antenna (option '1' for one tag only)"},
298 {"sim", CmdAWIDSim, 0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
299 {"clone", CmdAWIDClone, 0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
300 {NULL, NULL, 0, NULL}
301 };
302
303 int CmdLFAWID(const char *Cmd) {
304 CmdsParse(CommandTable, Cmd);
305 return 0;
306 }
307
308 int CmdHelp(const char *Cmd) {
309 CmdsHelp(CommandTable);
310 return 0;
311 }
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