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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 "cmdlfhid.h"
12
13 static int CmdHelp(const char *Cmd);
14
15 int usage_lf_hid_wiegand(void){
16 PrintAndLog("This command converts facility code/card number to Wiegand code");
17 PrintAndLog("Usage: lf hid wiegand [h] [OEM] [FC] [CN]");
18
19 PrintAndLog("Options:");
20 PrintAndLog(" h - This help");
21 PrintAndLog(" OEM - OEM number / site code");
22 PrintAndLog(" FC - facility code");
23 PrintAndLog(" CN - card number");
24 PrintAndLog("Examples:");
25 PrintAndLog(" lf hid wiegand 0 101 2001");
26 return 0;
27 }
28 int usage_lf_hid_sim(void){
29 PrintAndLog("HID Tag simulator");
30 PrintAndLog("");
31 PrintAndLog("Usage: lf hid sim [h] [ID]");
32 PrintAndLog("Options:");
33 PrintAndLog(" h - This help");
34 PrintAndLog(" ID - HID id");
35 PrintAndLog("Examples:");
36 PrintAndLog(" lf hid sim 224");
37 return 0;
38 }
39 int usage_lf_hid_clone(void){
40 PrintAndLog("Clone HID to T55x7. Tag must be on antenna. ");
41 PrintAndLog("");
42 PrintAndLog("Usage: lf hid clone [h] [ID] <L>");
43 PrintAndLog("Options:");
44 PrintAndLog(" h - This help");
45 PrintAndLog(" ID - HID id");
46 PrintAndLog(" L - 84bit ID");
47 PrintAndLog("Examples:");
48 PrintAndLog(" lf hid clone 224");
49 PrintAndLog(" lf hid clone 224 L");
50 return 0;
51 }
52 int usage_lf_hid_brute(void){
53 PrintAndLog("Enables bruteforce of HID readers with specified facility code.");
54 PrintAndLog("This is a attack against reader. if cardnumber is given, it starts with it and goes up / down one step");
55 PrintAndLog("if cardnumber is not given, it starts with 1 and goes up to 65535");
56 PrintAndLog("");
57 PrintAndLog("Usage: lf hid brute [h] a <format> f <facility-code> c <cardnumber> d <delay>");
58 PrintAndLog("Options :");
59 PrintAndLog(" h : This help");
60 PrintAndLog(" a <format> : 26|33|34|35|37|40|44|84");
61 PrintAndLog(" f <facility-code> : 8-bit value HID facility code");
62 PrintAndLog(" c <cardnumber> : (optional) cardnumber to start with, max 65535");
63 PrintAndLog(" d <delay> : delay betweens attempts in ms. Default 1000ms");
64 PrintAndLog("");
65 PrintAndLog("Samples:");
66 PrintAndLog(" lf hid brute a 26 f 224");
67 PrintAndLog(" lf hid brute a 26 f 21 d 2000");
68 PrintAndLog(" lf hid brute a 26 f 21 c 200 d 2000");
69 return 0;
70 }
71
72 static int sendPing(void){
73 UsbCommand ping = {CMD_PING, {1, 2, 3}};
74 SendCommand(&ping);
75 SendCommand(&ping);
76 SendCommand(&ping);
77 clearCommandBuffer();
78 UsbCommand resp;
79 if (WaitForResponseTimeout(CMD_ACK, &resp, 1000))
80 return 0;
81 return 1;
82 }
83 static bool sendTry(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint32_t delay, uint8_t *bs){
84
85 PrintAndLog("Trying FC: %u; CN: %u", fc, cn);
86
87 calcWiegand( fmtlen, fc, cn, bs);
88
89 uint64_t arg1 = bytebits_to_byte(bs,32);
90 uint64_t arg2 = bytebits_to_byte(bs+32,32);
91 UsbCommand c = {CMD_HID_SIM_TAG, {arg1, arg2, 0}};
92 clearCommandBuffer();
93 SendCommand(&c);
94 msleep(delay);
95 sendPing();
96 return TRUE;
97 }
98
99 int CmdHIDDemodFSK(const char *Cmd) {
100 int findone = ( Cmd[0] == '1' ) ? 1 : 0;
101 UsbCommand c = {CMD_HID_DEMOD_FSK, {findone, 0 , 0}};
102 clearCommandBuffer();
103 SendCommand(&c);
104 return 0;
105 }
106
107 int CmdHIDSim(const char *Cmd) {
108 unsigned int hi = 0, lo = 0;
109 int n = 0, i = 0;
110
111 uint8_t ctmp = param_getchar(Cmd, 0);
112 if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_hid_sim();
113
114 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
115 hi = (hi << 4) | (lo >> 28);
116 lo = (lo << 4) | (n & 0xf);
117 }
118
119 PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
120 PrintAndLog("Press pm3-button to abort simulation");
121
122 UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
123 clearCommandBuffer();
124 SendCommand(&c);
125 return 0;
126 }
127
128 int CmdHIDClone(const char *Cmd) {
129
130 uint32_t hi2 = 0, hi = 0, lo = 0;
131 int n = 0, i = 0;
132 UsbCommand c;
133
134 uint8_t ctmp = param_getchar(Cmd, 0);
135 if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_hid_clone();
136
137 if (strchr(Cmd,'l') != 0) {
138 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
139 hi2 = (hi2 << 4) | (hi >> 28);
140 hi = (hi << 4) | (lo >> 28);
141 lo = (lo << 4) | (n & 0xf);
142 }
143
144 PrintAndLog("Cloning tag with long ID %x%08x%08x", hi2, hi, lo);
145
146 c.d.asBytes[0] = 1;
147 } else {
148 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
149 hi = (hi << 4) | (lo >> 28);
150 lo = (lo << 4) | (n & 0xf);
151 }
152
153 PrintAndLog("Cloning tag with ID %x%08x", hi, lo);
154
155 hi2 = 0;
156 c.d.asBytes[0] = 0;
157 }
158
159 c.cmd = CMD_HID_CLONE_TAG;
160 c.arg[0] = hi2;
161 c.arg[1] = hi;
162 c.arg[2] = lo;
163
164 clearCommandBuffer();
165 SendCommand(&c);
166 return 0;
167 }
168 // struct to handle wiegand
169 typedef struct {
170 uint8_t FormatLen;
171 uint8_t SiteCode;
172 uint8_t FacilityCode;
173 uint8_t CardNumber;
174 uint8_t* Wiegand;
175 size_t Wiegand_n;
176 } wiegand_t;
177
178 // static void addHIDMarker(uint8_t fmtlen, uint8_t *out) {
179
180 // }
181 //static void getParity26(uint32_t *hi, uint32_t *lo){
182 // uint32_t result = 0;
183 // int i;
184 // // even parity
185 // for (i = 24;i >= 13;i--)
186 // result ^= (*lo >> i) & 1;
187 // // even parity 26th bit
188 // *lo |= result << 25;
189
190 // // odd parity
191 // result = 0;
192 // for (i = 12;i >= 1;i--)
193 // result ^= (*lo >> i) & 1;
194 // *lo |= !result;
195 //}
196
197 // static void getParity33(uint32_t *hi, uint32_t *lo){
198
199 // }
200 // static void getParity34(uint32_t *hi, uint32_t *lo){
201 // uint32_t result = 0;
202 // int i;
203
204 // // even parity
205 // for (i = 7;i >= 0;i--)
206 // result ^= (*hi >> i) & i;
207 // for (i = 31;i >= 24;i--)
208 // result ^= (*lo >> i) & 1;
209
210 // *hi |= result << 2;
211
212 // // odd parity bit
213 // result = 0;
214 // for (i = 23;i >= 1;i--)
215 // result ^= (*lo >> i) & 1;
216
217 // *lo |= !result;
218 // }
219 // static void getParity35(uint32_t *hi, uint32_t *lo){
220 // }
221 // static void getParity37S(uint32_t *hi,uint32_t *lo){
222 // uint32_t result = 0;
223 // int i;
224
225 // // even parity
226 // for (i = 4; i >= 0; i--)
227 // result ^= (*hi >> i) & 1;
228
229 // for (i = 31; i >= 20; i--)
230 // result ^= (*lo >> i) & 1;
231
232 // *hi |= result;
233
234 // // odd parity
235 // result = 0;
236 // for (i = 19; i >= 1; i--)
237 // result ^= (*lo >> i) & 1;
238
239 // *lo |= result;
240 // }
241 // static void getParity37H(uint32_t *hi, uint32_t *lo){
242 // uint32_t result = 0;
243 // int i;
244
245 // // even parity
246 // for (i = 4;i >= 0;i--)
247 // result ^= (*hi >> i) & 1;
248 // for (i = 31;i >= 20;i--)
249 // result ^= (*lo >> i) & 1;
250 // *hi |= result << 4;
251
252 // // odd parity
253 // result = 0;
254 // for (i = 19;i >= 1;i--)
255 // result ^= (*lo >> i) & 1;
256 // *lo |= result;
257 // }
258
259 //static void calc26(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
260 void calc26(uint16_t fc, uint32_t cardno, uint8_t *out){
261
262 uint8_t wiegand[24];
263 num_to_bytebits(fc, 8, wiegand);
264 num_to_bytebits(cardno, 16, wiegand+8);
265 wiegand_add_parity(out, wiegand, sizeof(wiegand) );
266
267 // *out |= (1 << 26); // why this?
268 // *out |= (1 << 37); // bit format for hid?
269 }
270 // static void calc33(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
271
272 // }
273 // static void calc34(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
274 // // put card number first bit 1 .. 20 //
275 // *lo = ((cardno & 0X000F7FFF) << 1) | ((fc & 0XFFFF) << 17);
276 // // set bit format for less than 37 bit format
277 // *hi = (1 << 5) | (fc >> 15);
278 // }
279 // static void calc35(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
280 // *lo = ((cardno & 0xFFFFF) << 1) | fc << 21;
281 // *hi = (1 << 5) | ((fc >> 11) & 1);
282 // }
283 // static void calc37S(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
284 // // FC 2 - 17 - 16 bit
285 // // cardno 18 - 36 - 19 bit
286 // // Even P1 1 - 19
287 // // Odd P37 19 - 36
288
289 // fc = fc & 0xFFFF;
290 // *lo = ((fc << 20) | (cardno & 0x7FFFF) << 1);
291 // *hi = (fc >> 12);
292 // }
293 // static void calc37H(uint64_t cardno, uint32_t *hi, uint32_t *lo){
294 // // SC NONE
295 // // cardno 1-35 34 bits
296 // // Even Parity 0th bit 1-18
297 // // Odd Parity 36th bit 19-35
298 // cardno = (cardno & 0x00000003FFFFFFFF);
299 // *lo = (cardno << 1);
300 // *hi = (cardno >> 31);
301 // }
302 // static void calc40(uint64_t cardno, uint32_t *hi, uint32_t *lo){
303 // cardno = (cardno & 0xFFFFFFFFFF);
304 // *lo = ((cardno & 0xFFFFFFFF) << 1 );
305 // *hi = (cardno >> 31);
306 // }
307
308 void calcWiegand(uint8_t fmtlen, uint16_t fc, uint64_t cardno, uint8_t *bits){
309
310 // uint32_t hi = 0, lo = 0;
311 // uint32_t cn32 = (cardno & 0xFFFFFFFF);
312 // switch ( fmtlen ) {
313 // case 26 : {
314 // calc26(fc, cn32, bits);
315 // addHIDFormatMarker(fmtlen, bits);
316 // break;
317 // }
318 // case 33 : {
319 // // calc33(fc, cn32, hi, lo);
320 // // getParity33(hi, lo);
321 // break;
322 // }
323 // case 34 : {
324 // calc34(fc, cn32, hi, lo);
325 // getParity34(hi, lo);
326 // break;
327 // }
328 // case 35 : {
329 // calc35(fc, cn32, hi, lo);
330 // getParity35(hi, lo);
331 // break;
332 // }
333 // case 37 : {
334 // calc37S(fc, cn32, hi, lo);
335 // getParity37S(hi, lo);
336 // break;
337 // }
338 // case 38 : {
339 // calc37H(cn32, hi, lo);
340 // getParity37H(hi, lo);
341 // break;
342 // }
343 // case 40 : calc40(cardno, hi, lo); break;
344 // case 44 : { break; }
345 // case 84 : { break; }
346 // }
347
348 }
349
350 int CmdHIDWiegand(const char *Cmd) {
351 uint32_t oem = 0, fc = 0;
352 uint64_t cardnum = 0;
353
354 uint32_t blocks[2] = {0,0};
355 uint32_t wiegand[2] = {0,0};
356
357 uint8_t bits[96];
358 uint8_t *bs = bits;
359 memset(bs, 0, sizeof(bits));
360
361 uint8_t ctmp = param_getchar(Cmd, 0);
362 if ( strlen(Cmd) == 0 || strlen(Cmd) < 3 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_hid_wiegand();
363
364 oem = param_get8(Cmd, 0);
365 fc = param_get32ex(Cmd, 1, 0, 10);
366 cardnum = param_get64ex(Cmd, 2, 0, 10);
367
368 //
369 uint8_t ftmlen[] = {26,33,34,35,37,38,40};
370
371 PrintAndLog("HID | OEM | FC | CN | Wiegand | HID Formatted");
372 PrintAndLog("----+-----+-----+-------+-----------+--------------------");
373 for (uint8_t i = 0; i < sizeof(ftmlen); i++){
374 calcWiegand( ftmlen[i], fc, cardnum, bs);
375 blocks[0] = bytebits_to_byte(bs,32);
376 blocks[1] = bytebits_to_byte(bs+32,32);
377 PrintAndLog(" %d | %d | %d | %llu | %08X%08X | %08X%08X ",
378 ftmlen,
379 oem,
380 fc,
381 cardnum,
382 wiegand[0],
383 wiegand[1],
384 blocks[0],
385 blocks[1]
386 );
387 }
388 PrintAndLog("----+-----+-----+-------+-----------+--------------------");
389 return 0;
390 }
391
392 int CmdHIDBrute(const char *Cmd){
393
394 bool errors = false;
395 uint32_t fc = 0, cn = 0, delay = 1000;
396 uint8_t fmtlen = 0;
397 uint8_t bits[96];
398 uint8_t *bs = bits;
399 memset(bs, 0, sizeof(bits));
400 uint8_t cmdp = 0;
401
402 while(param_getchar(Cmd, cmdp) != 0x00 && !errors) {
403 switch(param_getchar(Cmd, cmdp)) {
404 case 'h':
405 case 'H':
406 return usage_lf_hid_brute();
407 case 'f':
408 case 'F':
409 fc = param_get32ex(Cmd ,cmdp+1, 0, 10);
410 if ( !fc )
411 errors = true;
412 cmdp += 2;
413 break;
414 case 'd':
415 case 'D':
416 // delay between attemps, defaults to 1000ms.
417 delay = param_get32ex(Cmd, cmdp+1, 1000, 10);
418 cmdp += 2;
419 break;
420 case 'c':
421 case 'C':
422 cn = param_get32ex(Cmd, cmdp+1, 0, 10);
423 // truncate cardnumber.
424 cn &= 0xFFFF;
425 cmdp += 2;
426 break;
427 case 'a':
428 case 'A':
429 fmtlen = param_get8(Cmd, cmdp+1);
430 cmdp += 2;
431 bool is_ftm_ok = FALSE;
432 uint8_t ftms[] = {26,33,34,35,37};
433 for ( uint8_t i = 0; i < sizeof(ftms); i++){
434 if ( ftms[i] == fmtlen ) {
435 is_ftm_ok = TRUE;
436 }
437 }
438 // negated
439 errors = !is_ftm_ok;
440 break;
441 default:
442 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
443 errors = true;
444 break;
445 }
446 }
447 if ( fc == 0 ) errors = true;
448 if ( errors ) return usage_lf_hid_brute();
449
450 PrintAndLog("Brute-forcing HID reader");
451 PrintAndLog("Press pm3-button to abort simulation or run another command");
452
453 uint16_t up = cn;
454 uint16_t down = cn;
455
456 for (;;){
457
458 if ( offline ) {
459 printf("Device offline\n");
460 return 2;
461 }
462
463 if (ukbhit()) {
464 PrintAndLog("aborted via keyboard!");
465 return sendPing();
466 }
467
468 // Do one up
469 if ( up < 0xFFFF )
470 if ( !sendTry(fmtlen, fc, up++, delay, bs)) return 1;
471
472 // Do one down (if cardnumber is given)
473 if ( cn > 1 )
474 if ( down > 1 )
475 if ( !sendTry(fmtlen, fc, --down, delay, bs)) return 1;
476 }
477 return 0;
478 }
479
480 static command_t CommandTable[] = {
481 {"help", CmdHelp, 1, "This help"},
482 {"fskdemod",CmdHIDDemodFSK, 0, "Realtime HID FSK demodulator"},
483 {"sim", CmdHIDSim, 0, "HID tag simulator"},
484 {"clone", CmdHIDClone, 0, "Clone HID to T55x7"},
485 {"wiegand", CmdHIDWiegand, 1, "Convert facility code/card number to Wiegand code"},
486 {"brute", CmdHIDBrute, 0, "Bruteforce card number against reader"},
487 {NULL, NULL, 0, NULL}
488 };
489
490 int CmdLFHID(const char *Cmd) {
491 clearCommandBuffer();
492 CmdsParse(CommandTable, Cmd);
493 return 0;
494 }
495
496 int CmdHelp(const char *Cmd) {
497 CmdsHelp(CommandTable);
498 return 0;
499 }
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