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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 AWID26/50 commands
11 //-----------------------------------------------------------------------------
12 #include "cmdlfawid.h" // AWID function declarations
13
14 static int CmdHelp(const char *Cmd);
15
16 int usage_lf_awid_fskdemod(void) {
17 PrintAndLog("Enables AWID compatible reader mode printing details of scanned AWID26 or AWID50 tags.");
18 PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
19 PrintAndLog("If the [1] option is provided, reader mode is exited after reading a single AWID card.");
20 PrintAndLog("");
21 PrintAndLog("Usage: lf awid fskdemod [h] [1]");
22 PrintAndLog("Options:");
23 PrintAndLog(" h : This help");
24 PrintAndLog(" 1 : (optional) stop after reading a single card");
25 PrintAndLog("");
26 PrintAndLog("Samples:");
27 PrintAndLog(" lf awid fskdemod");
28 PrintAndLog(" lf awid fskdemod 1");
29 return 0;
30 }
31
32 int usage_lf_awid_sim(void) {
33 PrintAndLog("Enables simulation of AWID card with specified facility-code and card number.");
34 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
35 PrintAndLog("");
36 PrintAndLog("Usage: lf awid sim [h] <format> <facility-code> <card-number>");
37 PrintAndLog("Options:");
38 PrintAndLog(" h : This help");
39 PrintAndLog(" <format> : format length 26|34|37|50");
40 PrintAndLog(" <facility-code> : 8|16bit value facility code");
41 PrintAndLog(" <card number> : 16|32-bit value card number");
42 PrintAndLog("");
43 PrintAndLog("Samples:");
44 PrintAndLog(" lf awid sim 26 224 1337");
45 PrintAndLog(" lf awid sim 50 2001 13371337");
46 return 0;
47 }
48
49 int usage_lf_awid_clone(void) {
50 PrintAndLog("Enables cloning of AWID card with specified facility-code and card number onto T55x7.");
51 PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");
52 PrintAndLog("");
53 PrintAndLog("Usage: lf awid clone [h] <format> <facility-code> <card-number> [Q5]");
54 PrintAndLog("Options:");
55 PrintAndLog(" h : This help");
56 PrintAndLog(" <format> : format length 26|34|37|50");
57 PrintAndLog(" <facility-code> : 8|16bit value facility code");
58 PrintAndLog(" <card number> : 16|32-bit value card number");
59 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
60 PrintAndLog("");
61 PrintAndLog("Samples:");
62 PrintAndLog(" lf awid clone 26 224 1337");
63 PrintAndLog(" lf awid clone 50 2001 13371337");
64 return 0;
65 }
66
67 int usage_lf_awid_brute(void){
68 PrintAndLog("Enables bruteforce of AWID reader with specified facility-code.");
69 PrintAndLog("This is a attack against reader. if cardnumber is given, it starts with it and goes up / down one step");
70 PrintAndLog("if cardnumber is not given, it starts with 1 and goes up to 65535");
71 PrintAndLog("");
72 PrintAndLog("Usage: lf awid brute [h] a <format> f <facility-code> c <cardnumber> d <delay>");
73 PrintAndLog("Options:");
74 PrintAndLog(" h : This help");
75 PrintAndLog(" a <format> : format length 26|50");
76 PrintAndLog(" f <facility-code> : 8|16bit value facility code");
77 PrintAndLog(" c <cardnumber> : (optional) cardnumber to start with, max 65535");
78 PrintAndLog(" d <delay> : delay betweens attempts in ms. Default 1000ms");
79 PrintAndLog("");
80 PrintAndLog("Samples:");
81 PrintAndLog(" lf awid brute a 26 f 224");
82 PrintAndLog(" lf awid brute a 50 f 2001 d 2000");
83 PrintAndLog(" lf awid brute a 50 f 2001 c 200 d 2000");
84 return 0;
85 }
86
87 static int sendPing(void){
88 UsbCommand ping = {CMD_PING, {1, 2, 3}};
89 SendCommand(&ping);
90 SendCommand(&ping);
91 SendCommand(&ping);
92 clearCommandBuffer();
93 UsbCommand resp;
94 if (WaitForResponseTimeout(CMD_ACK, &resp, 1000))
95 return 0;
96 return 1;
97 }
98
99 static bool sendTry(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint32_t delay, uint8_t *bs, size_t bs_len){
100
101 PrintAndLog("Trying FC: %u; CN: %u", fc, cn);
102 if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
103 PrintAndLog("Error with tag bitstream generation.");
104 return FALSE;
105 }
106
107 uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
108 uint64_t arg2 = 50; // clk RF/50 invert=0
109 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, bs_len}};
110 memcpy(c.d.asBytes, bs, bs_len);
111 clearCommandBuffer();
112 SendCommand(&c);
113 msleep(delay);
114 sendPing();
115 return TRUE;
116 }
117
118 int CmdAWIDDemodFSK(const char *Cmd) {
119 int findone = 0;
120 if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
121 if (Cmd[0] == '1') findone = 1;
122
123 UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
124 clearCommandBuffer();
125 SendCommand(&c);
126 return 0;
127 }
128
129 int CmdAWIDRead(const char *Cmd) {
130 CmdLFRead("s");
131 getSamples("12000", TRUE);
132 return CmdFSKdemodAWID(Cmd);
133 }
134
135 //refactored by marshmellow
136 int getAWIDBits(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint8_t *bits) {
137
138 // the return bits, preamble 0000 0001
139 bits[7] = 1;
140
141 uint8_t pre[66];
142 memset(pre, 0, sizeof(pre));
143
144 // add formatlength
145 num_to_bytebits(fmtlen, 8, pre);
146
147 // add facilitycode, cardnumber and wiegand parity bits
148 switch (fmtlen) {
149 case 26:{
150 uint8_t wiegand[24];
151 num_to_bytebits(fc, 8, wiegand);
152 num_to_bytebits(cn, 16, wiegand+8);
153 wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
154 break;
155 }
156 case 34:{
157 uint8_t wiegand[32];
158 num_to_bytebits(fc, 8, wiegand);
159 num_to_bytebits(cn, 24, wiegand+8);
160 wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
161 break;
162 }
163 case 37:{
164 uint8_t wiegand[31];
165 num_to_bytebits(fc, 13, wiegand);
166 num_to_bytebits(cn, 18, wiegand+13);
167 wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
168 break;
169 }
170 case 50: {
171 uint8_t wiegand[48];
172 num_to_bytebits(fc, 16, wiegand);
173 num_to_bytebits(cn, 32, wiegand+16);
174 wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
175 break;
176 }
177 }
178
179 // add AWID 4bit parity
180 size_t bitLen = addParity(pre, bits+8, 66, 4, 1);
181
182 if (bitLen != 88) return 0;
183 return 1;
184 }
185
186 static void verify_values(uint8_t *fmtlen, uint32_t *fc, uint32_t *cn){
187 switch (*fmtlen) {
188 case 50:
189 if ((*fc & 0xFFFF) != *fc) {
190 *fc &= 0xFFFF;
191 PrintAndLog("Facility-Code Truncated to 16-bits (AWID50): %u", *fc);
192 }
193 break;
194 case 37:
195 if ((*fc & 0x1FFF) != *fc) {
196 *fc &= 0x1FFF;
197 PrintAndLog("Facility-Code Truncated to 13-bits (AWID37): %u", *fc);
198 }
199 if ((*cn & 0x3FFFF) != *cn) {
200 *cn &= 0x3FFFF;
201 PrintAndLog("Card Number Truncated to 18-bits (AWID37): %u", *cn);
202 }
203 break;
204 case 34:
205 if ((*fc & 0xFF) != *fc) {
206 *fc &= 0xFF;
207 PrintAndLog("Facility-Code Truncated to 8-bits (AWID34): %u", *fc);
208 }
209 if ((*cn & 0xFFFFFF) != *cn) {
210 *cn &= 0xFFFFFF;
211 PrintAndLog("Card Number Truncated to 24-bits (AWID34): %u", *cn);
212 }
213 break;
214 case 26:
215 default:
216 *fmtlen = 26;
217 if ((*fc & 0xFF) != *fc) {
218 *fc &= 0xFF;
219 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", *fc);
220 }
221 if ((*cn & 0xFFFF) != *cn) {
222 *cn &= 0xFFFF;
223 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", *cn);
224 }
225 break;
226 }
227 }
228
229 int CmdAWIDSim(const char *Cmd) {
230 uint32_t fc = 0, cn = 0;
231 uint8_t fmtlen = 0;
232 uint8_t bits[96];
233 uint8_t *bs = bits;
234 size_t size = sizeof(bits);
235 memset(bs, 0x00, size);
236
237 uint64_t arg1 = ( 10 << 8 ) + 8; // fcHigh = 10, fcLow = 8
238 uint64_t arg2 = 50; // clk RF/50 invert=0
239
240 char cmdp = param_getchar(Cmd, 0);
241 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_sim();
242
243 fmtlen = param_get8(Cmd, 0);
244 fc = param_get32ex(Cmd, 1, 0, 10);
245 cn = param_get32ex(Cmd, 2, 0, 10);
246 if ( !fc || !cn) return usage_lf_awid_sim();
247
248 verify_values(&fmtlen, &fc, &cn);
249
250 PrintAndLog("Emulating AWID %u -- FC: %u; CN: %u\n", fmtlen, fc, cn);
251 PrintAndLog("Press pm3-button to abort simulation or run another command");
252
253 if (!getAWIDBits(fmtlen, fc, cn, bs)) {
254 PrintAndLog("Error with tag bitstream generation.");
255 return 1;
256 }
257 // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
258 // arg1 --- fcHigh<<8 + fcLow
259 // arg2 --- Inversion and clk setting
260 // 96 --- Bitstream length: 96-bits == 12 bytes
261 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
262 memcpy(c.d.asBytes, bs, size);
263 clearCommandBuffer();
264 SendCommand(&c);
265 return 0;
266 }
267
268 int CmdAWIDClone(const char *Cmd) {
269 uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
270 uint32_t fc = 0, cn = 0;
271 uint8_t fmtlen = 0;
272 uint8_t bits[96];
273 uint8_t *bs=bits;
274 memset(bs,0,sizeof(bits));
275
276 char cmdp = param_getchar(Cmd, 0);
277 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_clone();
278
279 fmtlen = param_get8(Cmd, 0);
280 fc = param_get32ex(Cmd, 1, 0, 10);
281 cn = param_get32ex(Cmd, 2, 0, 10);
282
283 if ( !fc || !cn) return usage_lf_awid_clone();
284
285 if (param_getchar(Cmd, 4) == 'Q' || param_getchar(Cmd, 4) == 'q')
286 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
287 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
288
289 verify_values(&fmtlen, &fc, &cn);
290
291 if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
292 PrintAndLog("Error with tag bitstream generation.");
293 return 1;
294 }
295
296 blocks[1] = bytebits_to_byte(bs,32);
297 blocks[2] = bytebits_to_byte(bs+32,32);
298 blocks[3] = bytebits_to_byte(bs+64,32);
299
300 PrintAndLog("Preparing to clone AWID %u to T55x7 with FC: %u, CN: %u", fmtlen, fc, cn);
301 PrintAndLog("Blk | Data ");
302 PrintAndLog("----+------------");
303 PrintAndLog(" 00 | 0x%08x", blocks[0]);
304 PrintAndLog(" 01 | 0x%08x", blocks[1]);
305 PrintAndLog(" 02 | 0x%08x", blocks[2]);
306 PrintAndLog(" 03 | 0x%08x", blocks[3]);
307
308 UsbCommand resp;
309 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
310
311 for (uint8_t i=0; i<4; i++) {
312 c.arg[0] = blocks[i];
313 c.arg[1] = i;
314 clearCommandBuffer();
315 SendCommand(&c);
316 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)){
317 PrintAndLog("Error occurred, device did not respond during write operation.");
318 return -1;
319 }
320 }
321 return 0;
322 }
323
324 int CmdAWIDBrute(const char *Cmd){
325
326 bool errors = false;
327 uint32_t fc = 0, cn = 0, delay = 1000;
328 uint8_t fmtlen = 0;
329 uint8_t bits[96];
330 uint8_t *bs = bits;
331 size_t size = sizeof(bits);
332 memset(bs, 0x00, size);
333 uint8_t cmdp = 0;
334
335 while(param_getchar(Cmd, cmdp) != 0x00 && !errors) {
336 switch(param_getchar(Cmd, cmdp)) {
337 case 'h':
338 case 'H':
339 return usage_lf_awid_brute();
340 case 'f':
341 case 'F':
342 fc = param_get32ex(Cmd ,cmdp+1, 0, 10);
343 if ( !fc )
344 errors = true;
345 cmdp += 2;
346 break;
347 case 'd':
348 case 'D':
349 // delay between attemps, defaults to 1000ms.
350 delay = param_get32ex(Cmd, cmdp+1, 1000, 10);
351 cmdp += 2;
352 break;
353 case 'c':
354 case 'C':
355 cn = param_get32ex(Cmd, cmdp+1, 0, 10);
356 // truncate cardnumber.
357 cn &= 0xFFFF;
358 cmdp += 2;
359 break;
360 case 'a':
361 case 'A':
362 fmtlen = param_get8(Cmd, cmdp+1);
363 cmdp += 2;
364 break;
365 default:
366 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
367 errors = true;
368 break;
369 }
370 }
371 if ( fc == 0 )errors = true;
372 if ( errors ) return usage_lf_awid_brute();
373
374 // limit fc according to selected format
375 switch(fmtlen) {
376 case 50:
377 if ((fc & 0xFFFF) != fc) {
378 fc &= 0xFFFF;
379 PrintAndLog("Facility-code truncated to 16-bits (AWID50): %u", fc);
380 }
381 break;
382 default:
383 if ((fc & 0xFF) != fc) {
384 fc &= 0xFF;
385 PrintAndLog("Facility-code truncated to 8-bits (AWID26): %u", fc);
386 }
387 break;
388 }
389
390 PrintAndLog("Bruteforceing AWID %d Reader", fmtlen);
391 PrintAndLog("Press pm3-button to abort simulation or press key");
392
393 uint16_t up = cn;
394 uint16_t down = cn;
395
396 for (;;){
397
398 if ( offline ) {
399 printf("Device offline\n");
400 return 2;
401 }
402 if (ukbhit()) {
403 PrintAndLog("aborted via keyboard!");
404 return sendPing();
405 }
406
407 // Do one up
408 if ( up < 0xFFFF )
409 if ( !sendTry(fmtlen, fc, up++, delay, bs, size)) return 1;
410
411 // Do one down (if cardnumber is given)
412 if ( cn > 1 )
413 if ( down > 1 )
414 if ( !sendTry(fmtlen, fc, --down, delay, bs, size)) return 1;
415 }
416 return 0;
417 }
418
419 static command_t CommandTable[] = {
420 {"help", CmdHelp, 1, "This help"},
421 {"fskdemod", CmdAWIDDemodFSK, 0, "Realtime AWID FSK demodulator"},
422 {"read", CmdAWIDRead, 0, "Attempt to read and extract tag data"},
423 {"sim", CmdAWIDSim, 0, "AWID tag simulator"},
424 {"clone", CmdAWIDClone, 0, "Clone AWID to T55x7"},
425 {"brute", CmdAWIDBrute, 0, "Bruteforce card number against reader"},
426 {NULL, NULL, 0, NULL}
427 };
428
429 int CmdLFAWID(const char *Cmd) {
430 clearCommandBuffer();
431 CmdsParse(CommandTable, Cmd);
432 return 0;
433 }
434
435 int CmdHelp(const char *Cmd) {
436 CmdsHelp(CommandTable);
437 return 0;
438 }
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