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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 commands
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <limits.h>
15 #include "proxmark3.h"
16 #include "data.h"
17 #include "graph.h"
18 #include "ui.h"
19 #include "cmdparser.h"
20 #include "cmdmain.h"
21 #include "cmddata.h"
22 #include "util.h"
23 #include "cmdlf.h"
24 #include "cmdlfhid.h"
25 #include "cmdlfawid.h"
26 #include "cmdlfti.h"
27 #include "cmdlfem4x.h"
28 #include "cmdlfhitag.h"
29 #include "cmdlft55xx.h"
30 #include "cmdlfpcf7931.h"
31 #include "cmdlfio.h"
32 #include "cmdlfviking.h"
33 #include "lfdemod.h"
34
35 static int CmdHelp(const char *Cmd);
36
37
38
39 int usage_lf_cmdread()
40 {
41 PrintAndLog("Usage: lf cmdread d <delay period> z <zero period> o <one period> c <cmdbytes> [H] ");
42 PrintAndLog("Options: ");
43 PrintAndLog(" h This help");
44 PrintAndLog(" L Low frequency (125 KHz)");
45 PrintAndLog(" H High frequency (134 KHz)");
46 PrintAndLog(" d <delay> delay OFF period");
47 PrintAndLog(" z <zero> time period ZERO");
48 PrintAndLog(" o <one> time period ONE");
49 PrintAndLog(" c <cmd> Command bytes");
50 PrintAndLog(" ************* All periods in microseconds");
51 PrintAndLog("Examples:");
52 PrintAndLog(" lf cmdread d 80 z 100 o 200 c 11000");
53 PrintAndLog(" lf cmdread d 80 z 100 o 100 c 11000 H");
54 return 0;
55 }
56
57 /* send a command before reading */
58 int CmdLFCommandRead(const char *Cmd)
59 {
60 static char dummy[3] = {0x20,0x00,0x00};
61 UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
62 bool errors = FALSE;
63 //uint8_t divisor = 95; //125khz
64 uint8_t cmdp = 0;
65 int strLength = 0;
66 while(param_getchar(Cmd, cmdp) != 0x00)
67 {
68 switch(param_getchar(Cmd, cmdp))
69 {
70 case 'h':
71 return usage_lf_cmdread();
72 case 'H':
73 //divisor = 88;
74 dummy[1]='h';
75 cmdp++;
76 break;
77 case 'L':
78 cmdp++;
79 break;
80 case 'c':
81 strLength = param_getstr(Cmd, cmdp+1, (char *)&c.d.asBytes);
82 cmdp+=2;
83 break;
84 case 'd':
85 c.arg[0] = param_get32ex(Cmd, cmdp+1, 0, 10);
86 cmdp+=2;
87 break;
88 case 'z':
89 c.arg[1] = param_get32ex(Cmd, cmdp+1, 0, 10);
90 cmdp+=2;
91 break;
92 case 'o':
93 c.arg[2] = param_get32ex(Cmd, cmdp+1, 0, 10);
94 cmdp+=2;
95 break;
96 default:
97 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
98 errors = 1;
99 break;
100 }
101 if(errors) break;
102 }
103 // No args
104 if(cmdp == 0) errors = 1;
105
106 //Validations
107 if(errors) return usage_lf_cmdread();
108
109 // in case they specified 'H'
110 strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
111
112 clearCommandBuffer();
113 SendCommand(&c);
114 return 0;
115 }
116
117 int CmdFlexdemod(const char *Cmd)
118 {
119 int i;
120 for (i = 0; i < GraphTraceLen; ++i) {
121 if (GraphBuffer[i] < 0) {
122 GraphBuffer[i] = -1;
123 } else {
124 GraphBuffer[i] = 1;
125 }
126 }
127
128 #define LONG_WAIT 100
129 int start;
130 for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
131 int first = GraphBuffer[start];
132 for (i = start; i < start + LONG_WAIT; i++) {
133 if (GraphBuffer[i] != first) {
134 break;
135 }
136 }
137 if (i == (start + LONG_WAIT)) {
138 break;
139 }
140 }
141 if (start == GraphTraceLen - LONG_WAIT) {
142 PrintAndLog("nothing to wait for");
143 return 0;
144 }
145
146 GraphBuffer[start] = 2;
147 GraphBuffer[start+1] = -2;
148 uint8_t bits[64] = {0x00};
149
150 int bit, sum;
151 i = start;
152 for (bit = 0; bit < 64; bit++) {
153 sum = 0;
154 for (int j = 0; j < 16; j++) {
155 sum += GraphBuffer[i++];
156 }
157
158 bits[bit] = (sum > 0) ? 1 : 0;
159
160 PrintAndLog("bit %d sum %d", bit, sum);
161 }
162
163 for (bit = 0; bit < 64; bit++) {
164 int j;
165 int sum = 0;
166 for (j = 0; j < 16; j++) {
167 sum += GraphBuffer[i++];
168 }
169 if (sum > 0 && bits[bit] != 1) {
170 PrintAndLog("oops1 at %d", bit);
171 }
172 if (sum < 0 && bits[bit] != 0) {
173 PrintAndLog("oops2 at %d", bit);
174 }
175 }
176
177 // HACK writing back to graphbuffer.
178 GraphTraceLen = 32*64;
179 i = 0;
180 int phase = 0;
181 for (bit = 0; bit < 64; bit++) {
182
183 phase = (bits[bit] == 0) ? 0 : 1;
184
185 int j;
186 for (j = 0; j < 32; j++) {
187 GraphBuffer[i++] = phase;
188 phase = !phase;
189 }
190 }
191
192 RepaintGraphWindow();
193 return 0;
194 }
195
196 int CmdIndalaDemod(const char *Cmd)
197 {
198 // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
199
200 int state = -1;
201 int count = 0;
202 int i, j;
203
204 // worst case with GraphTraceLen=64000 is < 4096
205 // under normal conditions it's < 2048
206
207 uint8_t rawbits[4096];
208 int rawbit = 0;
209 int worst = 0, worstPos = 0;
210 // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
211
212 // loop through raw signal - since we know it is psk1 rf/32 fc/2 skip every other value (+=2)
213 for (i = 0; i < GraphTraceLen-1; i += 2) {
214 count += 1;
215 if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
216 // appears redundant - marshmellow
217 if (state == 0) {
218 for (j = 0; j < count - 8; j += 16) {
219 rawbits[rawbit++] = 0;
220 }
221 if ((abs(count - j)) > worst) {
222 worst = abs(count - j);
223 worstPos = i;
224 }
225 }
226 state = 1;
227 count = 0;
228 } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
229 //appears redundant
230 if (state == 1) {
231 for (j = 0; j < count - 8; j += 16) {
232 rawbits[rawbit++] = 1;
233 }
234 if ((abs(count - j)) > worst) {
235 worst = abs(count - j);
236 worstPos = i;
237 }
238 }
239 state = 0;
240 count = 0;
241 }
242 }
243
244 if (rawbit>0){
245 PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
246 PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
247 } else {
248 return 0;
249 }
250
251 // Finding the start of a UID
252 int uidlen, long_wait;
253 if (strcmp(Cmd, "224") == 0) {
254 uidlen = 224;
255 long_wait = 30;
256 } else {
257 uidlen = 64;
258 long_wait = 29;
259 }
260
261 int start;
262 int first = 0;
263 for (start = 0; start <= rawbit - uidlen; start++) {
264 first = rawbits[start];
265 for (i = start; i < start + long_wait; i++) {
266 if (rawbits[i] != first) {
267 break;
268 }
269 }
270 if (i == (start + long_wait)) {
271 break;
272 }
273 }
274
275 if (start == rawbit - uidlen + 1) {
276 PrintAndLog("nothing to wait for");
277 return 0;
278 }
279
280 // Inverting signal if needed
281 if (first == 1) {
282 for (i = start; i < rawbit; i++) {
283 rawbits[i] = !rawbits[i];
284 }
285 }
286
287 // Dumping UID
288 uint8_t bits[224] = {0x00};
289 char showbits[225] = {0x00};
290 int bit;
291 i = start;
292 int times = 0;
293
294 if (uidlen > rawbit) {
295 PrintAndLog("Warning: not enough raw bits to get a full UID");
296 for (bit = 0; bit < rawbit; bit++) {
297 bits[bit] = rawbits[i++];
298 // As we cannot know the parity, let's use "." and "/"
299 showbits[bit] = '.' + bits[bit];
300 }
301 showbits[bit+1]='\0';
302 PrintAndLog("Partial UID=%s", showbits);
303 return 0;
304 } else {
305 for (bit = 0; bit < uidlen; bit++) {
306 bits[bit] = rawbits[i++];
307 showbits[bit] = '0' + bits[bit];
308 }
309 times = 1;
310 }
311
312 //convert UID to HEX
313 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
314 int idx;
315 uid1 = uid2 = 0;
316
317 if (uidlen==64){
318 for( idx=0; idx<64; idx++) {
319 if (showbits[idx] == '0') {
320 uid1=(uid1<<1)|(uid2>>31);
321 uid2=(uid2<<1)|0;
322 } else {
323 uid1=(uid1<<1)|(uid2>>31);
324 uid2=(uid2<<1)|1;
325 }
326 }
327 PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
328 }
329 else {
330 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
331
332 for( idx=0; idx<224; idx++) {
333 uid1=(uid1<<1)|(uid2>>31);
334 uid2=(uid2<<1)|(uid3>>31);
335 uid3=(uid3<<1)|(uid4>>31);
336 uid4=(uid4<<1)|(uid5>>31);
337 uid5=(uid5<<1)|(uid6>>31);
338 uid6=(uid6<<1)|(uid7>>31);
339
340 if (showbits[idx] == '0')
341 uid7 = (uid7<<1) | 0;
342 else
343 uid7 = (uid7<<1) | 1;
344 }
345 PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
346 }
347
348 // Checking UID against next occurrences
349 int failed = 0;
350 for (; i + uidlen <= rawbit;) {
351 failed = 0;
352 for (bit = 0; bit < uidlen; bit++) {
353 if (bits[bit] != rawbits[i++]) {
354 failed = 1;
355 break;
356 }
357 }
358 if (failed == 1) {
359 break;
360 }
361 times += 1;
362 }
363
364 PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
365
366 // Remodulating for tag cloning
367 // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
368 // since this changes graphbuffer data.
369 GraphTraceLen = 32*uidlen;
370 i = 0;
371 int phase = 0;
372 for (bit = 0; bit < uidlen; bit++) {
373 if (bits[bit] == 0) {
374 phase = 0;
375 } else {
376 phase = 1;
377 }
378 int j;
379 for (j = 0; j < 32; j++) {
380 GraphBuffer[i++] = phase;
381 phase = !phase;
382 }
383 }
384
385 RepaintGraphWindow();
386 return 1;
387 }
388
389 int CmdIndalaClone(const char *Cmd)
390 {
391 UsbCommand c;
392 unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
393
394 uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
395 int n = 0, i = 0;
396
397 if (strchr(Cmd,'l') != 0) {
398 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
399 uid1 = (uid1 << 4) | (uid2 >> 28);
400 uid2 = (uid2 << 4) | (uid3 >> 28);
401 uid3 = (uid3 << 4) | (uid4 >> 28);
402 uid4 = (uid4 << 4) | (uid5 >> 28);
403 uid5 = (uid5 << 4) | (uid6 >> 28);
404 uid6 = (uid6 << 4) | (uid7 >> 28);
405 uid7 = (uid7 << 4) | (n & 0xf);
406 }
407 PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
408 c.cmd = CMD_INDALA_CLONE_TAG_L;
409 c.d.asDwords[0] = uid1;
410 c.d.asDwords[1] = uid2;
411 c.d.asDwords[2] = uid3;
412 c.d.asDwords[3] = uid4;
413 c.d.asDwords[4] = uid5;
414 c.d.asDwords[5] = uid6;
415 c.d.asDwords[6] = uid7;
416 } else {
417 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
418 uid1 = (uid1 << 4) | (uid2 >> 28);
419 uid2 = (uid2 << 4) | (n & 0xf);
420 }
421 PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
422 c.cmd = CMD_INDALA_CLONE_TAG;
423 c.arg[0] = uid1;
424 c.arg[1] = uid2;
425 }
426
427 clearCommandBuffer();
428 SendCommand(&c);
429 return 0;
430 }
431
432 int usage_lf_read()
433 {
434 PrintAndLog("Usage: lf read");
435 PrintAndLog("Options: ");
436 PrintAndLog(" h This help");
437 PrintAndLog(" s silent run no printout");
438 PrintAndLog("This function takes no arguments. ");
439 PrintAndLog("Use 'lf config' to set parameters.");
440 return 0;
441 }
442 int usage_lf_snoop()
443 {
444 PrintAndLog("Usage: lf snoop");
445 PrintAndLog("Options: ");
446 PrintAndLog(" h This help");
447 PrintAndLog("This function takes no arguments. ");
448 PrintAndLog("Use 'lf config' to set parameters.");
449 return 0;
450 }
451
452 int usage_lf_config()
453 {
454 PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
455 PrintAndLog("Options: ");
456 PrintAndLog(" h This help");
457 PrintAndLog(" L Low frequency (125 KHz)");
458 PrintAndLog(" H High frequency (134 KHz)");
459 PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
460 PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
461 PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
462 PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
463 PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
464 PrintAndLog("Examples:");
465 PrintAndLog(" lf config b 8 L");
466 PrintAndLog(" Samples at 125KHz, 8bps.");
467 PrintAndLog(" lf config H b 4 d 3");
468 PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
469 PrintAndLog(" a resolution of 4 bits per sample.");
470 PrintAndLog(" lf read");
471 PrintAndLog(" Performs a read (active field)");
472 PrintAndLog(" lf snoop");
473 PrintAndLog(" Performs a snoop (no active field)");
474 return 0;
475 }
476
477 int CmdLFSetConfig(const char *Cmd)
478 {
479
480 uint8_t divisor = 0;//Frequency divisor
481 uint8_t bps = 0; // Bits per sample
482 uint8_t decimation = 0; //How many to keep
483 bool averaging = 1; // Defaults to true
484 bool errors = FALSE;
485 int trigger_threshold =-1;//Means no change
486 uint8_t unsigned_trigg = 0;
487
488 uint8_t cmdp =0;
489 while(param_getchar(Cmd, cmdp) != 0x00)
490 {
491 switch(param_getchar(Cmd, cmdp))
492 {
493 case 'h':
494 return usage_lf_config();
495 case 'H':
496 divisor = 88;
497 cmdp++;
498 break;
499 case 'L':
500 divisor = 95;
501 cmdp++;
502 break;
503 case 'q':
504 errors |= param_getdec(Cmd,cmdp+1,&divisor);
505 cmdp+=2;
506 break;
507 case 't':
508 errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
509 cmdp+=2;
510 if(!errors) trigger_threshold = unsigned_trigg;
511 break;
512 case 'b':
513 errors |= param_getdec(Cmd,cmdp+1,&bps);
514 cmdp+=2;
515 break;
516 case 'd':
517 errors |= param_getdec(Cmd,cmdp+1,&decimation);
518 cmdp+=2;
519 break;
520 case 'a':
521 averaging = param_getchar(Cmd,cmdp+1) == '1';
522 cmdp+=2;
523 break;
524 default:
525 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
526 errors = 1;
527 break;
528 }
529 if(errors) break;
530 }
531 if(cmdp == 0)
532 {
533 errors = 1;// No args
534 }
535
536 //Validations
537 if(errors)
538 {
539 return usage_lf_config();
540 }
541 //Bps is limited to 8, so fits in lower half of arg1
542 if(bps >> 8) bps = 8;
543
544 sample_config config = {
545 decimation,bps,averaging,divisor,trigger_threshold
546 };
547 //Averaging is a flag on high-bit of arg[1]
548 UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
549 memcpy(c.d.asBytes,&config,sizeof(sample_config));
550 clearCommandBuffer();
551 SendCommand(&c);
552 return 0;
553 }
554
555 int CmdLFRead(const char *Cmd)
556 {
557
558 uint8_t cmdp = 0;
559 bool arg1 = false;
560 if (param_getchar(Cmd, cmdp) == 'h')
561 {
562 return usage_lf_read();
563 }
564 if (param_getchar(Cmd, cmdp) == 's') arg1 = true; //suppress print
565 //And ship it to device
566 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
567 clearCommandBuffer();
568 SendCommand(&c);
569 //WaitForResponse(CMD_ACK,NULL);
570 if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
571 PrintAndLog("command execution time out");
572 return 1;
573 }
574
575 return 0;
576 }
577
578 int CmdLFSnoop(const char *Cmd)
579 {
580 uint8_t cmdp =0;
581 if(param_getchar(Cmd, cmdp) == 'h')
582 {
583 return usage_lf_snoop();
584 }
585
586 UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
587 clearCommandBuffer();
588 SendCommand(&c);
589 WaitForResponse(CMD_ACK,NULL);
590 return 0;
591 }
592
593 static void ChkBitstream(const char *str)
594 {
595 int i;
596
597 /* convert to bitstream if necessary */
598 for (i = 0; i < (int)(GraphTraceLen / 2); i++){
599 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
600 CmdGetBitStream("");
601 break;
602 }
603 }
604 }
605 //Attempt to simulate any wave in buffer (one bit per output sample)
606 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
607 int CmdLFSim(const char *Cmd)
608 {
609 int i,j;
610 static int gap;
611
612 sscanf(Cmd, "%i", &gap);
613
614 // convert to bitstream if necessary
615
616 ChkBitstream(Cmd);
617
618 //can send only 512 bits at a time (1 byte sent per bit...)
619 printf("Sending [%d bytes]", GraphTraceLen);
620 for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
621 UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
622
623 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
624 c.d.asBytes[j] = GraphBuffer[i+j];
625 }
626 SendCommand(&c);
627 WaitForResponse(CMD_ACK,NULL);
628 printf(".");
629 }
630
631 printf("\n");
632 PrintAndLog("Starting to simulate");
633 UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
634 clearCommandBuffer();
635 SendCommand(&c);
636 return 0;
637 }
638
639 int usage_lf_simfsk(void)
640 {
641 //print help
642 PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
643 PrintAndLog("Options: ");
644 PrintAndLog(" h This help");
645 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
646 PrintAndLog(" i invert data");
647 PrintAndLog(" H <fcHigh> Manually set the larger Field Clock");
648 PrintAndLog(" L <fcLow> Manually set the smaller Field Clock");
649 //PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
650 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
651 PrintAndLog("\n NOTE: if you set one clock manually set them all manually");
652 return 0;
653 }
654
655 int usage_lf_simask(void)
656 {
657 //print help
658 PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
659 PrintAndLog("Options: ");
660 PrintAndLog(" h This help");
661 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
662 PrintAndLog(" i invert data");
663 PrintAndLog(" b sim ask/biphase");
664 PrintAndLog(" m sim ask/manchester - Default");
665 PrintAndLog(" r sim ask/raw");
666 PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
667 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
668 return 0;
669 }
670
671 int usage_lf_simpsk(void)
672 {
673 //print help
674 PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
675 PrintAndLog("Options: ");
676 PrintAndLog(" h This help");
677 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
678 PrintAndLog(" i invert data");
679 PrintAndLog(" 1 set PSK1 (default)");
680 PrintAndLog(" 2 set PSK2");
681 PrintAndLog(" 3 set PSK3");
682 PrintAndLog(" r <carrier> 2|4|8 are valid carriers: default = 2");
683 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
684 return 0;
685 }
686
687 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
688 // - allow pull data from DemodBuffer
689 int CmdLFfskSim(const char *Cmd)
690 {
691 //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
692 // otherwise will need FChigh, FClow, Clock, and bitstream
693 uint8_t fcHigh=0, fcLow=0, clk=0;
694 uint8_t invert=0;
695 bool errors = FALSE;
696 char hexData[32] = {0x00}; // store entered hex data
697 uint8_t data[255] = {0x00};
698 int dataLen = 0;
699 uint8_t cmdp = 0;
700 while(param_getchar(Cmd, cmdp) != 0x00)
701 {
702 switch(param_getchar(Cmd, cmdp))
703 {
704 case 'h':
705 return usage_lf_simfsk();
706 case 'i':
707 invert = 1;
708 cmdp++;
709 break;
710 case 'c':
711 errors |= param_getdec(Cmd,cmdp+1,&clk);
712 cmdp+=2;
713 break;
714 case 'H':
715 errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
716 cmdp+=2;
717 break;
718 case 'L':
719 errors |= param_getdec(Cmd,cmdp+1,&fcLow);
720 cmdp+=2;
721 break;
722 //case 's':
723 // separator=1;
724 // cmdp++;
725 // break;
726 case 'd':
727 dataLen = param_getstr(Cmd, cmdp+1, hexData);
728 if (dataLen==0) {
729 errors=TRUE;
730 } else {
731 dataLen = hextobinarray((char *)data, hexData);
732 }
733 if (dataLen==0) errors=TRUE;
734 if (errors) PrintAndLog ("Error getting hex data");
735 cmdp+=2;
736 break;
737 default:
738 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
739 errors = TRUE;
740 break;
741 }
742 if(errors) break;
743 }
744 if(cmdp == 0 && DemodBufferLen == 0)
745 {
746 errors = TRUE;// No args
747 }
748
749 //Validations
750 if(errors)
751 {
752 return usage_lf_simfsk();
753 }
754
755 if (dataLen == 0){ //using DemodBuffer
756 if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
757 uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
758 if (ans==0){
759 if (!fcHigh) fcHigh=10;
760 if (!fcLow) fcLow=8;
761 if (!clk) clk=50;
762 }
763 }
764 } else {
765 setDemodBuf(data, dataLen, 0);
766 }
767
768 //default if not found
769 if (clk == 0) clk = 50;
770 if (fcHigh == 0) fcHigh = 10;
771 if (fcLow == 0) fcLow = 8;
772
773 uint16_t arg1, arg2;
774 arg1 = fcHigh << 8 | fcLow;
775 arg2 = invert << 8 | clk;
776 size_t size = DemodBufferLen;
777 if (size > USB_CMD_DATA_SIZE) {
778 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
779 size = USB_CMD_DATA_SIZE;
780 }
781 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
782
783 memcpy(c.d.asBytes, DemodBuffer, size);
784 clearCommandBuffer();
785 SendCommand(&c);
786 return 0;
787 }
788
789 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
790 // - allow pull data from DemodBuffer
791 int CmdLFaskSim(const char *Cmd)
792 {
793 //autodetect clock from Graphbuffer if using demod buffer
794 // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
795 uint8_t encoding = 1, separator = 0;
796 uint8_t clk=0, invert=0;
797 bool errors = FALSE;
798 char hexData[32] = {0x00};
799 uint8_t data[255]= {0x00}; // store entered hex data
800 int dataLen = 0;
801 uint8_t cmdp = 0;
802 while(param_getchar(Cmd, cmdp) != 0x00)
803 {
804 switch(param_getchar(Cmd, cmdp))
805 {
806 case 'h':
807 return usage_lf_simask();
808 case 'i':
809 invert = 1;
810 cmdp++;
811 break;
812 case 'c':
813 errors |= param_getdec(Cmd,cmdp+1,&clk);
814 cmdp+=2;
815 break;
816 case 'b':
817 encoding=2; //biphase
818 cmdp++;
819 break;
820 case 'm':
821 encoding=1;
822 cmdp++;
823 break;
824 case 'r':
825 encoding=0;
826 cmdp++;
827 break;
828 case 's':
829 separator=1;
830 cmdp++;
831 break;
832 case 'd':
833 dataLen = param_getstr(Cmd, cmdp+1, hexData);
834 if (dataLen==0) {
835 errors=TRUE;
836 } else {
837 dataLen = hextobinarray((char *)data, hexData);
838 }
839 if (dataLen==0) errors=TRUE;
840 if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
841 cmdp+=2;
842 break;
843 default:
844 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
845 errors = TRUE;
846 break;
847 }
848 if(errors) break;
849 }
850 if(cmdp == 0 && DemodBufferLen == 0)
851 {
852 errors = TRUE;// No args
853 }
854
855 //Validations
856 if(errors)
857 {
858 return usage_lf_simask();
859 }
860 if (dataLen == 0){ //using DemodBuffer
861 if (clk == 0) clk = GetAskClock("0", false, false);
862 } else {
863 setDemodBuf(data, dataLen, 0);
864 }
865 if (clk == 0) clk = 64;
866 if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
867 uint16_t arg1, arg2;
868 size_t size=DemodBufferLen;
869 arg1 = clk << 8 | encoding;
870 arg2 = invert << 8 | separator;
871 if (size > USB_CMD_DATA_SIZE) {
872 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
873 size = USB_CMD_DATA_SIZE;
874 }
875 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
876 PrintAndLog("preparing to sim ask data: %d bits", size);
877 memcpy(c.d.asBytes, DemodBuffer, size);
878 clearCommandBuffer();
879 SendCommand(&c);
880 return 0;
881 }
882
883 // by marshmellow - sim psk data given carrier, clock, invert
884 // - allow pull data from DemodBuffer or parameters
885 int CmdLFpskSim(const char *Cmd)
886 {
887 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
888 //will need carrier, Clock, and bitstream
889 uint8_t carrier=0, clk=0;
890 uint8_t invert=0;
891 bool errors = FALSE;
892 char hexData[32] = {0x00}; // store entered hex data
893 uint8_t data[255] = {0x00};
894 int dataLen = 0;
895 uint8_t cmdp = 0;
896 uint8_t pskType = 1;
897 while(param_getchar(Cmd, cmdp) != 0x00)
898 {
899 switch(param_getchar(Cmd, cmdp))
900 {
901 case 'h':
902 return usage_lf_simpsk();
903 case 'i':
904 invert = 1;
905 cmdp++;
906 break;
907 case 'c':
908 errors |= param_getdec(Cmd,cmdp+1,&clk);
909 cmdp+=2;
910 break;
911 case 'r':
912 errors |= param_getdec(Cmd,cmdp+1,&carrier);
913 cmdp+=2;
914 break;
915 case '1':
916 pskType=1;
917 cmdp++;
918 break;
919 case '2':
920 pskType=2;
921 cmdp++;
922 break;
923 case '3':
924 pskType=3;
925 cmdp++;
926 break;
927 case 'd':
928 dataLen = param_getstr(Cmd, cmdp+1, hexData);
929 if (dataLen==0) {
930 errors=TRUE;
931 } else {
932 dataLen = hextobinarray((char *)data, hexData);
933 }
934 if (dataLen==0) errors=TRUE;
935 if (errors) PrintAndLog ("Error getting hex data");
936 cmdp+=2;
937 break;
938 default:
939 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
940 errors = TRUE;
941 break;
942 }
943 if (errors) break;
944 }
945 if (cmdp == 0 && DemodBufferLen == 0)
946 {
947 errors = TRUE;// No args
948 }
949
950 //Validations
951 if (errors)
952 {
953 return usage_lf_simpsk();
954 }
955 if (dataLen == 0){ //using DemodBuffer
956 PrintAndLog("Getting Clocks");
957 if (clk==0) clk = GetPskClock("", FALSE, FALSE);
958 PrintAndLog("clk: %d",clk);
959 if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
960 PrintAndLog("carrier: %d", carrier);
961 } else {
962 setDemodBuf(data, dataLen, 0);
963 }
964
965 if (clk <= 0) clk = 32;
966 if (carrier == 0) carrier = 2;
967 if (pskType != 1){
968 if (pskType == 2){
969 //need to convert psk2 to psk1 data before sim
970 psk2TOpsk1(DemodBuffer, DemodBufferLen);
971 } else {
972 PrintAndLog("Sorry, PSK3 not yet available");
973 }
974 }
975 uint16_t arg1, arg2;
976 arg1 = clk << 8 | carrier;
977 arg2 = invert;
978 size_t size=DemodBufferLen;
979 if (size > USB_CMD_DATA_SIZE) {
980 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
981 size=USB_CMD_DATA_SIZE;
982 }
983 UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
984 PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
985 memcpy(c.d.asBytes, DemodBuffer, size);
986 clearCommandBuffer();
987 SendCommand(&c);
988
989 return 0;
990 }
991
992 int CmdLFSimBidir(const char *Cmd)
993 {
994 // Set ADC to twice the carrier for a slight supersampling
995 // HACK: not implemented in ARMSRC.
996 PrintAndLog("Not implemented yet.");
997 UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
998 SendCommand(&c);
999 return 0;
1000 }
1001
1002 int CmdVchDemod(const char *Cmd)
1003 {
1004 // Is this the entire sync pattern, or does this also include some
1005 // data bits that happen to be the same everywhere? That would be
1006 // lovely to know.
1007 static const int SyncPattern[] = {
1008 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1009 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1010 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1011 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1012 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1013 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1014 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1015 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1016 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1017 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1018 };
1019
1020 // So first, we correlate for the sync pattern, and mark that.
1021 int bestCorrel = 0, bestPos = 0;
1022 int i;
1023 // It does us no good to find the sync pattern, with fewer than
1024 // 2048 samples after it...
1025 for (i = 0; i < (GraphTraceLen-2048); i++) {
1026 int sum = 0;
1027 int j;
1028 for (j = 0; j < arraylen(SyncPattern); j++) {
1029 sum += GraphBuffer[i+j]*SyncPattern[j];
1030 }
1031 if (sum > bestCorrel) {
1032 bestCorrel = sum;
1033 bestPos = i;
1034 }
1035 }
1036 PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
1037
1038 char bits[257];
1039 bits[256] = '\0';
1040
1041 int worst = INT_MAX;
1042 int worstPos = 0;
1043
1044 for (i = 0; i < 2048; i += 8) {
1045 int sum = 0;
1046 int j;
1047 for (j = 0; j < 8; j++) {
1048 sum += GraphBuffer[bestPos+i+j];
1049 }
1050 if (sum < 0) {
1051 bits[i/8] = '.';
1052 } else {
1053 bits[i/8] = '1';
1054 }
1055 if(abs(sum) < worst) {
1056 worst = abs(sum);
1057 worstPos = i;
1058 }
1059 }
1060 PrintAndLog("bits:");
1061 PrintAndLog("%s", bits);
1062 PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1063
1064 if (strcmp(Cmd, "clone")==0) {
1065 GraphTraceLen = 0;
1066 char *s;
1067 for(s = bits; *s; s++) {
1068 int j;
1069 for(j = 0; j < 16; j++) {
1070 GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1071 }
1072 }
1073 RepaintGraphWindow();
1074 }
1075 return 0;
1076 }
1077
1078 //by marshmellow
1079 int CmdLFfind(const char *Cmd)
1080 {
1081 int ans=0;
1082 char cmdp = param_getchar(Cmd, 0);
1083 char testRaw = param_getchar(Cmd, 1);
1084 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1085 PrintAndLog("Usage: lf search <0|1> [u]");
1086 PrintAndLog(" <use data from Graphbuffer> , if not set, try reading data from tag.");
1087 PrintAndLog(" [Search for Unknown tags] , if not set, reads only known tags.");
1088 PrintAndLog("");
1089 PrintAndLog(" sample: lf search = try reading data from tag & search for known tags");
1090 PrintAndLog(" : lf search 1 = use data from GraphBuffer & search for known tags");
1091 PrintAndLog(" : lf search u = try reading data from tag & search for known and unknown tags");
1092 PrintAndLog(" : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1093
1094 return 0;
1095 }
1096
1097 if (!offline && (cmdp != '1')){
1098 CmdLFRead("s");
1099 getSamples("30000",false);
1100 } else if (GraphTraceLen < 1000) {
1101 PrintAndLog("Data in Graphbuffer was too small.");
1102 return 0;
1103 }
1104 if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1105
1106 PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
1107 PrintAndLog("False Positives ARE possible\n");
1108 PrintAndLog("\nChecking for known tags:\n");
1109
1110 ans=CmdFSKdemodIO("");
1111 if (ans>0) {
1112 PrintAndLog("\nValid IO Prox ID Found!");
1113 return 1;
1114 }
1115
1116 ans=CmdFSKdemodPyramid("");
1117 if (ans>0) {
1118 PrintAndLog("\nValid Pyramid ID Found!");
1119 return 1;
1120 }
1121
1122 ans=CmdFSKdemodParadox("");
1123 if (ans>0) {
1124 PrintAndLog("\nValid Paradox ID Found!");
1125 return 1;
1126 }
1127
1128 ans=CmdFSKdemodAWID("");
1129 if (ans>0) {
1130 PrintAndLog("\nValid AWID ID Found!");
1131 return 1;
1132 }
1133
1134 ans=CmdFSKdemodHID("");
1135 if (ans>0) {
1136 PrintAndLog("\nValid HID Prox ID Found!");
1137 return 1;
1138 }
1139
1140 ans=CmdAskEM410xDemod("");
1141 if (ans>0) {
1142 PrintAndLog("\nValid EM410x ID Found!");
1143 return 1;
1144 }
1145
1146 ans=CmdG_Prox_II_Demod("");
1147 if (ans>0) {
1148 PrintAndLog("\nValid G Prox II ID Found!");
1149 return 1;
1150 }
1151
1152 ans=CmdFDXBdemodBI("");
1153 if (ans>0) {
1154 PrintAndLog("\nValid FDX-B ID Found!");
1155 return 1;
1156 }
1157
1158 ans=EM4x50Read("", false);
1159 if (ans>0) {
1160 PrintAndLog("\nValid EM4x50 ID Found!");
1161 return 1;
1162 }
1163
1164 ans=CmdVikingDemod("");
1165 if (ans>0) {
1166 PrintAndLog("\nValid Viking ID Found!");
1167 return 1;
1168 }
1169
1170 ans=CmdIndalaDecode("");
1171 if (ans>0) {
1172 PrintAndLog("\nValid Indala ID Found!");
1173 return 1;
1174 }
1175
1176 ans=CmdPSKNexWatch("");
1177 if (ans>0) {
1178 PrintAndLog("\nValid NexWatch ID Found!");
1179 return 1;
1180 }
1181
1182 PrintAndLog("\nNo Known Tags Found!\n");
1183 if (testRaw=='u' || testRaw=='U'){
1184 //test unknown tag formats (raw mode)
1185 PrintAndLog("\nChecking for Unknown tags:\n");
1186 ans=AutoCorrelate(4000, FALSE, FALSE);
1187 if (ans > 0) PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1188 ans=GetFskClock("",FALSE,FALSE);
1189 if (ans != 0){ //fsk
1190 ans=FSKrawDemod("",TRUE);
1191 if (ans>0) {
1192 PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1193 return 1;
1194 }
1195 }
1196 bool st = TRUE;
1197 ans=ASKDemod_ext("0 0 0",TRUE,FALSE,1,&st);
1198 if (ans>0) {
1199 PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1200 PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1201 return 1;
1202 }
1203 ans=CmdPSK1rawDemod("");
1204 if (ans>0) {
1205 PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1206 PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1207 PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1208 return 1;
1209 }
1210 PrintAndLog("\nNo Data Found!\n");
1211 }
1212 return 0;
1213 }
1214
1215 static command_t CommandTable[] =
1216 {
1217 {"help", CmdHelp, 1, "This help"},
1218 {"awid", CmdLFAWID, 1, "{ AWID RFIDs... }"},
1219 {"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
1220 {"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
1221 {"hitag", CmdLFHitag, 1, "{ Hitag tags and transponders... }"},
1222 {"io", CmdLFIO, 1, "{ ioProx tags... }"},
1223 {"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
1224 {"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
1225 {"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
1226 {"viking", CmdLFViking, 1, "{ Viking tags... }"},
1227 {"cmdread", CmdLFCommandRead, 0, "<d period> <z period> <o period> <c command> ['H'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'H' for 134)"},
1228 {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1229 {"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
1230 {"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1231 {"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1232 {"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1233 {"search", CmdLFfind, 1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) - 'u' to search for unknown tags"},
1234 {"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1235 {"simask", CmdLFaskSim, 0, "[clock] [invert <1|0>] [biphase/manchester/raw <'b'|'m'|'r'>] [msg separator 's'] [d <hexdata>] -- Simulate LF ASK tag from demodbuffer or input"},
1236 {"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] -- Simulate LF FSK tag from demodbuffer or input"},
1237 {"simpsk", CmdLFpskSim, 0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] -- Simulate LF PSK tag from demodbuffer or input"},
1238 {"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1239 {"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1240 {"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
1241 {NULL, NULL, 0, NULL}
1242 };
1243
1244 int CmdLF(const char *Cmd)
1245 {
1246 CmdsParse(CommandTable, Cmd);
1247 return 0;
1248 }
1249
1250 int CmdHelp(const char *Cmd)
1251 {
1252 CmdsHelp(CommandTable);
1253 return 0;
1254 }
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