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