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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 #include "cmdlfviking.h"
34 static int CmdHelp(const char *Cmd);
35
36
37 int usage_lf_cmdread()
38 {
39 PrintAndLog("Usage: lf cmdread <delay off> <zero> <one> <cmdbytes> [H] ");
40 PrintAndLog("Options: ");
41 PrintAndLog(" h This help");
42 PrintAndLog(" L Low frequency (125 KHz)");
43 PrintAndLog(" H High frequency (134 KHz)");
44 PrintAndLog(" H delay OFF");
45 PrintAndLog(" H time period ZERO");
46 PrintAndLog(" H time period ONE");
47 PrintAndLog("Examples:");
48 PrintAndLog(" lf cmdread 80 100 200 11000");
49 PrintAndLog(" lf cmdread 80 100 100 11000 H");
50 return 0;
51 }
52
53 /* send a command before reading */
54 int CmdLFCommandRead(const char *Cmd)
55 {
56 static char dummy[3] = {0x20,0x00,0x00};
57 bool errors = FALSE;
58 uint8_t divisor = 0; //125khz
59 uint8_t cmdp =0;
60 while(param_getchar(Cmd, cmdp) != 0x00)
61 {
62 switch(param_getchar(Cmd, cmdp))
63 {
64 case 'h':
65 return usage_lf_cmdread();
66 case 'H':
67 divisor = 88;
68 cmdp++;
69 break;
70 case 'a':
71 //param_getchar(Cmd, cmdp+1) == '1';
72 cmdp+=2;
73 break;
74 default:
75 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
76 errors = 1;
77 break;
78 }
79 if(errors) break;
80 }
81 // No args
82 if(cmdp == 0) errors = 1;
83
84 //Validations
85 if(errors) return usage_lf_cmdread();
86
87 UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
88 sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char*)(&c.d.asBytes),(char*)(&dummy+1));
89 // in case they specified 'h'
90 strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
91
92 PrintAndLog("ICE: %d %s -- %s", strlen((char *)c.d.asBytes) ,dummy, c.d.asBytes);
93 clearCommandBuffer();
94 SendCommand(&c);
95 return 0;
96 }
97
98 int CmdFlexdemod(const char *Cmd)
99 {
100 int i;
101 for (i = 0; i < GraphTraceLen; ++i) {
102 if (GraphBuffer[i] < 0) {
103 GraphBuffer[i] = -1;
104 } else {
105 GraphBuffer[i] = 1;
106 }
107 }
108
109 #define LONG_WAIT 100
110 int start;
111 for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
112 int first = GraphBuffer[start];
113 for (i = start; i < start + LONG_WAIT; i++) {
114 if (GraphBuffer[i] != first) {
115 break;
116 }
117 }
118 if (i == (start + LONG_WAIT)) {
119 break;
120 }
121 }
122 if (start == GraphTraceLen - LONG_WAIT) {
123 PrintAndLog("nothing to wait for");
124 return 0;
125 }
126
127 GraphBuffer[start] = 2;
128 GraphBuffer[start+1] = -2;
129 uint8_t bits[64] = {0x00};
130
131 int bit, sum;
132 i = start;
133 for (bit = 0; bit < 64; bit++) {
134 sum = 0;
135 for (int j = 0; j < 16; j++) {
136 sum += GraphBuffer[i++];
137 }
138
139 bits[bit] = (sum > 0) ? 1 : 0;
140
141 PrintAndLog("bit %d sum %d", bit, sum);
142 }
143
144 for (bit = 0; bit < 64; bit++) {
145 int j;
146 int sum = 0;
147 for (j = 0; j < 16; j++) {
148 sum += GraphBuffer[i++];
149 }
150 if (sum > 0 && bits[bit] != 1) {
151 PrintAndLog("oops1 at %d", bit);
152 }
153 if (sum < 0 && bits[bit] != 0) {
154 PrintAndLog("oops2 at %d", bit);
155 }
156 }
157
158 // HACK writing back to graphbuffer.
159 GraphTraceLen = 32*64;
160 i = 0;
161 int phase = 0;
162 for (bit = 0; bit < 64; bit++) {
163
164 phase = (bits[bit] == 0) ? 0 : 1;
165
166 int j;
167 for (j = 0; j < 32; j++) {
168 GraphBuffer[i++] = phase;
169 phase = !phase;
170 }
171 }
172
173 RepaintGraphWindow();
174 return 0;
175 }
176
177 int CmdIndalaDemod(const char *Cmd)
178 {
179 // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
180
181 int state = -1;
182 int count = 0;
183 int i, j;
184
185 // worst case with GraphTraceLen=64000 is < 4096
186 // under normal conditions it's < 2048
187
188 uint8_t rawbits[4096];
189 int rawbit = 0;
190 int worst = 0, worstPos = 0;
191 // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
192 for (i = 0; i < GraphTraceLen-1; i += 2) {
193 count += 1;
194 if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
195 if (state == 0) {
196 for (j = 0; j < count - 8; j += 16) {
197 rawbits[rawbit++] = 0;
198 }
199 if ((abs(count - j)) > worst) {
200 worst = abs(count - j);
201 worstPos = i;
202 }
203 }
204 state = 1;
205 count = 0;
206 } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
207 if (state == 1) {
208 for (j = 0; j < count - 8; j += 16) {
209 rawbits[rawbit++] = 1;
210 }
211 if ((abs(count - j)) > worst) {
212 worst = abs(count - j);
213 worstPos = i;
214 }
215 }
216 state = 0;
217 count = 0;
218 }
219 }
220
221 if (rawbit>0){
222 PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
223 PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
224 } else {
225 return 0;
226 }
227
228 // Finding the start of a UID
229 int uidlen, long_wait;
230 if (strcmp(Cmd, "224") == 0) {
231 uidlen = 224;
232 long_wait = 30;
233 } else {
234 uidlen = 64;
235 long_wait = 29;
236 }
237
238 int start;
239 int first = 0;
240 for (start = 0; start <= rawbit - uidlen; start++) {
241 first = rawbits[start];
242 for (i = start; i < start + long_wait; i++) {
243 if (rawbits[i] != first) {
244 break;
245 }
246 }
247 if (i == (start + long_wait)) {
248 break;
249 }
250 }
251
252 if (start == rawbit - uidlen + 1) {
253 PrintAndLog("nothing to wait for");
254 return 0;
255 }
256
257 // Inverting signal if needed
258 if (first == 1) {
259 for (i = start; i < rawbit; i++) {
260 rawbits[i] = !rawbits[i];
261 }
262 }
263
264 // Dumping UID
265 uint8_t bits[224] = {0x00};
266 char showbits[225] = {0x00};
267 int bit;
268 i = start;
269 int times = 0;
270
271 if (uidlen > rawbit) {
272 PrintAndLog("Warning: not enough raw bits to get a full UID");
273 for (bit = 0; bit < rawbit; bit++) {
274 bits[bit] = rawbits[i++];
275 // As we cannot know the parity, let's use "." and "/"
276 showbits[bit] = '.' + bits[bit];
277 }
278 showbits[bit+1]='\0';
279 PrintAndLog("Partial UID=%s", showbits);
280 return 0;
281 } else {
282 for (bit = 0; bit < uidlen; bit++) {
283 bits[bit] = rawbits[i++];
284 showbits[bit] = '0' + bits[bit];
285 }
286 times = 1;
287 }
288
289 //convert UID to HEX
290 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
291 int idx;
292 uid1 = uid2 = 0;
293
294 if (uidlen==64){
295 for( idx=0; idx<64; idx++) {
296 if (showbits[idx] == '0') {
297 uid1=(uid1<<1)|(uid2>>31);
298 uid2=(uid2<<1)|0;
299 } else {
300 uid1=(uid1<<1)|(uid2>>31);
301 uid2=(uid2<<1)|1;
302 }
303 }
304 PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
305 }
306 else {
307 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
308
309 for( idx=0; idx<224; idx++) {
310 uid1=(uid1<<1)|(uid2>>31);
311 uid2=(uid2<<1)|(uid3>>31);
312 uid3=(uid3<<1)|(uid4>>31);
313 uid4=(uid4<<1)|(uid5>>31);
314 uid5=(uid5<<1)|(uid6>>31);
315 uid6=(uid6<<1)|(uid7>>31);
316
317 if (showbits[idx] == '0')
318 uid7 = (uid7<<1) | 0;
319 else
320 uid7 = (uid7<<1) | 1;
321 }
322 PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
323 }
324
325 // Checking UID against next occurrences
326 int failed = 0;
327 for (; i + uidlen <= rawbit;) {
328 failed = 0;
329 for (bit = 0; bit < uidlen; bit++) {
330 if (bits[bit] != rawbits[i++]) {
331 failed = 1;
332 break;
333 }
334 }
335 if (failed == 1) {
336 break;
337 }
338 times += 1;
339 }
340
341 PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
342
343 // Remodulating for tag cloning
344 // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
345 // since this changes graphbuffer data.
346 GraphTraceLen = 32*uidlen;
347 i = 0;
348 int phase = 0;
349 for (bit = 0; bit < uidlen; bit++) {
350 if (bits[bit] == 0) {
351 phase = 0;
352 } else {
353 phase = 1;
354 }
355 int j;
356 for (j = 0; j < 32; j++) {
357 GraphBuffer[i++] = phase;
358 phase = !phase;
359 }
360 }
361
362 RepaintGraphWindow();
363 return 1;
364 }
365
366 int CmdIndalaClone(const char *Cmd)
367 {
368 UsbCommand c;
369 unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
370
371 uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
372 int n = 0, i = 0;
373
374 if (strchr(Cmd,'l') != 0) {
375 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
376 uid1 = (uid1 << 4) | (uid2 >> 28);
377 uid2 = (uid2 << 4) | (uid3 >> 28);
378 uid3 = (uid3 << 4) | (uid4 >> 28);
379 uid4 = (uid4 << 4) | (uid5 >> 28);
380 uid5 = (uid5 << 4) | (uid6 >> 28);
381 uid6 = (uid6 << 4) | (uid7 >> 28);
382 uid7 = (uid7 << 4) | (n & 0xf);
383 }
384 PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
385 c.cmd = CMD_INDALA_CLONE_TAG_L;
386 c.d.asDwords[0] = uid1;
387 c.d.asDwords[1] = uid2;
388 c.d.asDwords[2] = uid3;
389 c.d.asDwords[3] = uid4;
390 c.d.asDwords[4] = uid5;
391 c.d.asDwords[5] = uid6;
392 c.d.asDwords[6] = uid7;
393 } else {
394 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
395 uid1 = (uid1 << 4) | (uid2 >> 28);
396 uid2 = (uid2 << 4) | (n & 0xf);
397 }
398 PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
399 c.cmd = CMD_INDALA_CLONE_TAG;
400 c.arg[0] = uid1;
401 c.arg[1] = uid2;
402 }
403
404 SendCommand(&c);
405 return 0;
406 }
407
408 int usage_lf_read()
409 {
410 PrintAndLog("Usage: lf read");
411 PrintAndLog("Options: ");
412 PrintAndLog(" h This help");
413 PrintAndLog(" s silent run no printout");
414 PrintAndLog("This function takes no arguments. ");
415 PrintAndLog("Use 'lf config' to set parameters.");
416 return 0;
417 }
418 int usage_lf_snoop()
419 {
420 PrintAndLog("Usage: lf snoop");
421 PrintAndLog("Options: ");
422 PrintAndLog(" h This help");
423 PrintAndLog("This function takes no arguments. ");
424 PrintAndLog("Use 'lf config' to set parameters.");
425 return 0;
426 }
427
428 int usage_lf_config()
429 {
430 PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
431 PrintAndLog("Options: ");
432 PrintAndLog(" h This help");
433 PrintAndLog(" L Low frequency (125 KHz)");
434 PrintAndLog(" H High frequency (134 KHz)");
435 PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
436 PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
437 PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
438 PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
439 PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
440 PrintAndLog("Examples:");
441 PrintAndLog(" lf config b 8 L");
442 PrintAndLog(" Samples at 125KHz, 8bps.");
443 PrintAndLog(" lf config H b 4 d 3");
444 PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
445 PrintAndLog(" a resolution of 4 bits per sample.");
446 PrintAndLog(" lf read");
447 PrintAndLog(" Performs a read (active field)");
448 PrintAndLog(" lf snoop");
449 PrintAndLog(" Performs a snoop (no active field)");
450 return 0;
451 }
452
453 int CmdLFSetConfig(const char *Cmd)
454 {
455
456 uint8_t divisor = 0;//Frequency divisor
457 uint8_t bps = 0; // Bits per sample
458 uint8_t decimation = 0; //How many to keep
459 bool averaging = 1; // Defaults to true
460 bool errors = FALSE;
461 int trigger_threshold =-1;//Means no change
462 uint8_t unsigned_trigg = 0;
463
464 uint8_t cmdp =0;
465 while(param_getchar(Cmd, cmdp) != 0x00)
466 {
467 switch(param_getchar(Cmd, cmdp))
468 {
469 case 'h':
470 return usage_lf_config();
471 case 'H':
472 divisor = 88;
473 cmdp++;
474 break;
475 case 'L':
476 divisor = 95;
477 cmdp++;
478 break;
479 case 'q':
480 errors |= param_getdec(Cmd,cmdp+1,&divisor);
481 cmdp+=2;
482 break;
483 case 't':
484 errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
485 cmdp+=2;
486 if(!errors) trigger_threshold = unsigned_trigg;
487 break;
488 case 'b':
489 errors |= param_getdec(Cmd,cmdp+1,&bps);
490 cmdp+=2;
491 break;
492 case 'd':
493 errors |= param_getdec(Cmd,cmdp+1,&decimation);
494 cmdp+=2;
495 break;
496 case 'a':
497 averaging = param_getchar(Cmd,cmdp+1) == '1';
498 cmdp+=2;
499 break;
500 default:
501 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
502 errors = 1;
503 break;
504 }
505 if(errors) break;
506 }
507 if(cmdp == 0)
508 {
509 errors = 1;// No args
510 }
511
512 //Validations
513 if(errors)
514 {
515 return usage_lf_config();
516 }
517 //Bps is limited to 8, so fits in lower half of arg1
518 if(bps >> 8) bps = 8;
519
520 sample_config config = {
521 decimation,bps,averaging,divisor,trigger_threshold
522 };
523 //Averaging is a flag on high-bit of arg[1]
524 UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
525 memcpy(c.d.asBytes,&config,sizeof(sample_config));
526 SendCommand(&c);
527 return 0;
528 }
529
530 int CmdLFRead(const char *Cmd)
531 {
532
533 uint8_t cmdp = 0;
534 bool arg1 = false;
535 if (param_getchar(Cmd, cmdp) == 'h')
536 {
537 return usage_lf_read();
538 }
539 if (param_getchar(Cmd, cmdp) == 's') arg1 = true; //suppress print
540 //And ship it to device
541 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
542 SendCommand(&c);
543 //WaitForResponse(CMD_ACK,NULL);
544 if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
545 PrintAndLog("command execution time out");
546 return 1;
547 }
548
549 return 0;
550 }
551
552 int CmdLFSnoop(const char *Cmd)
553 {
554 uint8_t cmdp =0;
555 if(param_getchar(Cmd, cmdp) == 'h')
556 {
557 return usage_lf_snoop();
558 }
559
560 UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
561 SendCommand(&c);
562 WaitForResponse(CMD_ACK,NULL);
563 return 0;
564 }
565
566 static void ChkBitstream(const char *str)
567 {
568 int i;
569
570 /* convert to bitstream if necessary */
571 for (i = 0; i < (int)(GraphTraceLen / 2); i++){
572 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
573 CmdGetBitStream("");
574 break;
575 }
576 }
577 }
578 //Attempt to simulate any wave in buffer (one bit per output sample)
579 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
580 int CmdLFSim(const char *Cmd)
581 {
582 int i,j;
583 static int gap;
584
585 sscanf(Cmd, "%i", &gap);
586
587 // convert to bitstream if necessary
588
589 ChkBitstream(Cmd);
590
591 //can send only 512 bits at a time (1 byte sent per bit...)
592 printf("Sending [%d bytes]", GraphTraceLen);
593 for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
594 UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
595
596 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
597 c.d.asBytes[j] = GraphBuffer[i+j];
598 }
599 SendCommand(&c);
600 WaitForResponse(CMD_ACK,NULL);
601 printf(".");
602 }
603
604 printf("\n");
605 PrintAndLog("Starting to simulate");
606 UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
607 SendCommand(&c);
608 return 0;
609 }
610
611 int usage_lf_simfsk(void)
612 {
613 //print help
614 PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
615 PrintAndLog("Options: ");
616 PrintAndLog(" h This help");
617 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
618 PrintAndLog(" i invert data");
619 PrintAndLog(" H <fcHigh> Manually set the larger Field Clock");
620 PrintAndLog(" L <fcLow> Manually set the smaller Field Clock");
621 //PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
622 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
623 PrintAndLog("\n NOTE: if you set one clock manually set them all manually");
624 return 0;
625 }
626
627 int usage_lf_simask(void)
628 {
629 //print help
630 PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
631 PrintAndLog("Options: ");
632 PrintAndLog(" h This help");
633 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
634 PrintAndLog(" i invert data");
635 PrintAndLog(" b sim ask/biphase");
636 PrintAndLog(" m sim ask/manchester - Default");
637 PrintAndLog(" r sim ask/raw");
638 PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
639 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
640 return 0;
641 }
642
643 int usage_lf_simpsk(void)
644 {
645 //print help
646 PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
647 PrintAndLog("Options: ");
648 PrintAndLog(" h This help");
649 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
650 PrintAndLog(" i invert data");
651 PrintAndLog(" 1 set PSK1 (default)");
652 PrintAndLog(" 2 set PSK2");
653 PrintAndLog(" 3 set PSK3");
654 PrintAndLog(" r <carrier> 2|4|8 are valid carriers: default = 2");
655 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
656 return 0;
657 }
658
659 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
660 // - allow pull data from DemodBuffer
661 int CmdLFfskSim(const char *Cmd)
662 {
663 //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
664 // otherwise will need FChigh, FClow, Clock, and bitstream
665 uint8_t fcHigh=0, fcLow=0, clk=0;
666 uint8_t invert=0;
667 bool errors = FALSE;
668 char hexData[32] = {0x00}; // store entered hex data
669 uint8_t data[255] = {0x00};
670 int dataLen = 0;
671 uint8_t cmdp = 0;
672 while(param_getchar(Cmd, cmdp) != 0x00)
673 {
674 switch(param_getchar(Cmd, cmdp))
675 {
676 case 'h':
677 return usage_lf_simfsk();
678 case 'i':
679 invert = 1;
680 cmdp++;
681 break;
682 case 'c':
683 errors |= param_getdec(Cmd,cmdp+1,&clk);
684 cmdp+=2;
685 break;
686 case 'H':
687 errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
688 cmdp+=2;
689 break;
690 case 'L':
691 errors |= param_getdec(Cmd,cmdp+1,&fcLow);
692 cmdp+=2;
693 break;
694 //case 's':
695 // separator=1;
696 // cmdp++;
697 // break;
698 case 'd':
699 dataLen = param_getstr(Cmd, cmdp+1, hexData);
700 if (dataLen==0) {
701 errors=TRUE;
702 } else {
703 dataLen = hextobinarray((char *)data, hexData);
704 }
705 if (dataLen==0) errors=TRUE;
706 if (errors) PrintAndLog ("Error getting hex data");
707 cmdp+=2;
708 break;
709 default:
710 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
711 errors = TRUE;
712 break;
713 }
714 if(errors) break;
715 }
716 if(cmdp == 0 && DemodBufferLen == 0)
717 {
718 errors = TRUE;// No args
719 }
720
721 //Validations
722 if(errors)
723 {
724 return usage_lf_simfsk();
725 }
726
727 if (dataLen == 0){ //using DemodBuffer
728 if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
729 uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
730 if (ans==0){
731 if (!fcHigh) fcHigh=10;
732 if (!fcLow) fcLow=8;
733 if (!clk) clk=50;
734 }
735 }
736 } else {
737 setDemodBuf(data, dataLen, 0);
738 }
739
740 //default if not found
741 if (clk == 0) clk = 50;
742 if (fcHigh == 0) fcHigh = 10;
743 if (fcLow == 0) fcLow = 8;
744
745 uint16_t arg1, arg2;
746 arg1 = fcHigh << 8 | fcLow;
747 arg2 = invert << 8 | clk;
748 size_t size = DemodBufferLen;
749 if (size > USB_CMD_DATA_SIZE) {
750 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
751 size = USB_CMD_DATA_SIZE;
752 }
753 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
754
755 memcpy(c.d.asBytes, DemodBuffer, size);
756 SendCommand(&c);
757 return 0;
758 }
759
760 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
761 // - allow pull data from DemodBuffer
762 int CmdLFaskSim(const char *Cmd)
763 {
764 //autodetect clock from Graphbuffer if using demod buffer
765 // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
766 uint8_t encoding = 1, separator = 0;
767 uint8_t clk=0, invert=0;
768 bool errors = FALSE;
769 char hexData[32] = {0x00};
770 uint8_t data[255]= {0x00}; // store entered hex data
771 int dataLen = 0;
772 uint8_t cmdp = 0;
773 while(param_getchar(Cmd, cmdp) != 0x00)
774 {
775 switch(param_getchar(Cmd, cmdp))
776 {
777 case 'h':
778 return usage_lf_simask();
779 case 'i':
780 invert = 1;
781 cmdp++;
782 break;
783 case 'c':
784 errors |= param_getdec(Cmd,cmdp+1,&clk);
785 cmdp+=2;
786 break;
787 case 'b':
788 encoding=2; //biphase
789 cmdp++;
790 break;
791 case 'm':
792 encoding=1;
793 cmdp++;
794 break;
795 case 'r':
796 encoding=0;
797 cmdp++;
798 break;
799 case 's':
800 separator=1;
801 cmdp++;
802 break;
803 case 'd':
804 dataLen = param_getstr(Cmd, cmdp+1, hexData);
805 if (dataLen==0) {
806 errors=TRUE;
807 } else {
808 dataLen = hextobinarray((char *)data, hexData);
809 }
810 if (dataLen==0) errors=TRUE;
811 if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
812 cmdp+=2;
813 break;
814 default:
815 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
816 errors = TRUE;
817 break;
818 }
819 if(errors) break;
820 }
821 if(cmdp == 0 && DemodBufferLen == 0)
822 {
823 errors = TRUE;// No args
824 }
825
826 //Validations
827 if(errors)
828 {
829 return usage_lf_simask();
830 }
831 if (dataLen == 0){ //using DemodBuffer
832 if (clk == 0) clk = GetAskClock("0", false, false);
833 } else {
834 setDemodBuf(data, dataLen, 0);
835 }
836 if (clk == 0) clk = 64;
837 if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
838 uint16_t arg1, arg2;
839 size_t size=DemodBufferLen;
840 arg1 = clk << 8 | encoding;
841 arg2 = invert << 8 | separator;
842 if (size > USB_CMD_DATA_SIZE) {
843 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
844 size = USB_CMD_DATA_SIZE;
845 }
846 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
847 PrintAndLog("preparing to sim ask data: %d bits", size);
848 memcpy(c.d.asBytes, DemodBuffer, size);
849 SendCommand(&c);
850 return 0;
851 }
852
853 // by marshmellow - sim psk data given carrier, clock, invert
854 // - allow pull data from DemodBuffer or parameters
855 int CmdLFpskSim(const char *Cmd)
856 {
857 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
858 //will need carrier, Clock, and bitstream
859 uint8_t carrier=0, clk=0;
860 uint8_t invert=0;
861 bool errors = FALSE;
862 char hexData[32] = {0x00}; // store entered hex data
863 uint8_t data[255] = {0x00};
864 int dataLen = 0;
865 uint8_t cmdp = 0;
866 uint8_t pskType = 1;
867 while(param_getchar(Cmd, cmdp) != 0x00)
868 {
869 switch(param_getchar(Cmd, cmdp))
870 {
871 case 'h':
872 return usage_lf_simpsk();
873 case 'i':
874 invert = 1;
875 cmdp++;
876 break;
877 case 'c':
878 errors |= param_getdec(Cmd,cmdp+1,&clk);
879 cmdp+=2;
880 break;
881 case 'r':
882 errors |= param_getdec(Cmd,cmdp+1,&carrier);
883 cmdp+=2;
884 break;
885 case '1':
886 pskType=1;
887 cmdp++;
888 break;
889 case '2':
890 pskType=2;
891 cmdp++;
892 break;
893 case '3':
894 pskType=3;
895 cmdp++;
896 break;
897 case 'd':
898 dataLen = param_getstr(Cmd, cmdp+1, hexData);
899 if (dataLen==0) {
900 errors=TRUE;
901 } else {
902 dataLen = hextobinarray((char *)data, hexData);
903 }
904 if (dataLen==0) errors=TRUE;
905 if (errors) PrintAndLog ("Error getting hex data");
906 cmdp+=2;
907 break;
908 default:
909 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
910 errors = TRUE;
911 break;
912 }
913 if (errors) break;
914 }
915 if (cmdp == 0 && DemodBufferLen == 0)
916 {
917 errors = TRUE;// No args
918 }
919
920 //Validations
921 if (errors)
922 {
923 return usage_lf_simpsk();
924 }
925 if (dataLen == 0){ //using DemodBuffer
926 PrintAndLog("Getting Clocks");
927 if (clk==0) clk = GetPskClock("", FALSE, FALSE);
928 PrintAndLog("clk: %d",clk);
929 if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
930 PrintAndLog("carrier: %d", carrier);
931 } else {
932 setDemodBuf(data, dataLen, 0);
933 }
934
935 if (clk <= 0) clk = 32;
936 if (carrier == 0) carrier = 2;
937 if (pskType != 1){
938 if (pskType == 2){
939 //need to convert psk2 to psk1 data before sim
940 psk2TOpsk1(DemodBuffer, DemodBufferLen);
941 } else {
942 PrintAndLog("Sorry, PSK3 not yet available");
943 }
944 }
945 uint16_t arg1, arg2;
946 arg1 = clk << 8 | carrier;
947 arg2 = invert;
948 size_t size=DemodBufferLen;
949 if (size > USB_CMD_DATA_SIZE) {
950 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
951 size=USB_CMD_DATA_SIZE;
952 }
953 UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
954 PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
955 memcpy(c.d.asBytes, DemodBuffer, size);
956 SendCommand(&c);
957
958 return 0;
959 }
960
961 int CmdLFSimBidir(const char *Cmd)
962 {
963 // Set ADC to twice the carrier for a slight supersampling
964 // HACK: not implemented in ARMSRC.
965 PrintAndLog("Not implemented yet.");
966 UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
967 SendCommand(&c);
968 return 0;
969 }
970
971 int CmdVchDemod(const char *Cmd)
972 {
973 // Is this the entire sync pattern, or does this also include some
974 // data bits that happen to be the same everywhere? That would be
975 // lovely to know.
976 static const int SyncPattern[] = {
977 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
978 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
979 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
980 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
981 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
982 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
983 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
984 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
985 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
986 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
987 };
988
989 // So first, we correlate for the sync pattern, and mark that.
990 int bestCorrel = 0, bestPos = 0;
991 int i;
992 // It does us no good to find the sync pattern, with fewer than
993 // 2048 samples after it...
994 for (i = 0; i < (GraphTraceLen-2048); i++) {
995 int sum = 0;
996 int j;
997 for (j = 0; j < arraylen(SyncPattern); j++) {
998 sum += GraphBuffer[i+j]*SyncPattern[j];
999 }
1000 if (sum > bestCorrel) {
1001 bestCorrel = sum;
1002 bestPos = i;
1003 }
1004 }
1005 PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
1006
1007 char bits[257];
1008 bits[256] = '\0';
1009
1010 int worst = INT_MAX;
1011 int worstPos = 0;
1012
1013 for (i = 0; i < 2048; i += 8) {
1014 int sum = 0;
1015 int j;
1016 for (j = 0; j < 8; j++) {
1017 sum += GraphBuffer[bestPos+i+j];
1018 }
1019 if (sum < 0) {
1020 bits[i/8] = '.';
1021 } else {
1022 bits[i/8] = '1';
1023 }
1024 if(abs(sum) < worst) {
1025 worst = abs(sum);
1026 worstPos = i;
1027 }
1028 }
1029 PrintAndLog("bits:");
1030 PrintAndLog("%s", bits);
1031 PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1032
1033 if (strcmp(Cmd, "clone")==0) {
1034 GraphTraceLen = 0;
1035 char *s;
1036 for(s = bits; *s; s++) {
1037 int j;
1038 for(j = 0; j < 16; j++) {
1039 GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1040 }
1041 }
1042 RepaintGraphWindow();
1043 }
1044 return 0;
1045 }
1046
1047 //by marshmellow
1048 int CmdLFfind(const char *Cmd)
1049 {
1050 int ans=0;
1051 char cmdp = param_getchar(Cmd, 0);
1052 char testRaw = param_getchar(Cmd, 1);
1053 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1054 PrintAndLog("Usage: lf search <0|1> [u]");
1055 PrintAndLog(" <use data from Graphbuffer> , if not set, try reading data from tag.");
1056 PrintAndLog(" [Search for Unknown tags] , if not set, reads only known tags.");
1057 PrintAndLog("");
1058 PrintAndLog(" sample: lf search = try reading data from tag & search for known tags");
1059 PrintAndLog(" : lf search 1 = use data from GraphBuffer & search for known tags");
1060 PrintAndLog(" : lf search u = try reading data from tag & search for known and unknown tags");
1061 PrintAndLog(" : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1062
1063 return 0;
1064 }
1065
1066 if (!offline && (cmdp != '1')){
1067 CmdLFRead("s");
1068 getSamples("30000",false);
1069 } else if (GraphTraceLen < 1000) {
1070 PrintAndLog("Data in Graphbuffer was too small.");
1071 return 0;
1072 }
1073 if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1074
1075 PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
1076 PrintAndLog("False Positives ARE possible\n");
1077 PrintAndLog("\nChecking for known tags:\n");
1078
1079 ans=CmdFSKdemodIO("");
1080 if (ans>0) {
1081 PrintAndLog("\nValid IO Prox ID Found!");
1082 return 1;
1083 }
1084
1085 ans=CmdFSKdemodPyramid("");
1086 if (ans>0) {
1087 PrintAndLog("\nValid Pyramid ID Found!");
1088 return 1;
1089 }
1090
1091 ans=CmdFSKdemodParadox("");
1092 if (ans>0) {
1093 PrintAndLog("\nValid Paradox ID Found!");
1094 return 1;
1095 }
1096
1097 ans=CmdFSKdemodAWID("");
1098 if (ans>0) {
1099 PrintAndLog("\nValid AWID ID Found!");
1100 return 1;
1101 }
1102
1103 ans=CmdFSKdemodHID("");
1104 if (ans>0) {
1105 PrintAndLog("\nValid HID Prox ID Found!");
1106 return 1;
1107 }
1108
1109 //add psk and indala
1110 ans=CmdIndalaDecode("");
1111 if (ans>0) {
1112 PrintAndLog("\nValid Indala ID Found!");
1113 return 1;
1114 }
1115
1116 ans=CmdAskEM410xDemod("");
1117 if (ans>0) {
1118 PrintAndLog("\nValid EM410x ID Found!");
1119 return 1;
1120 }
1121
1122 ans=CmdG_Prox_II_Demod("");
1123 if (ans>0) {
1124 PrintAndLog("\nValid Guardall G-Prox II ID Found!");
1125 return 1;
1126 }
1127
1128 ans=CmdFDXBdemodBI("");
1129 if (ans>0) {
1130 PrintAndLog("\nValid FDX-B ID Found!");
1131 return 1;
1132 }
1133
1134 ans=EM4x50Read("", false);
1135 if (ans>0) {
1136 PrintAndLog("\nValid EM4x50 ID Found!");
1137 return 1;
1138 }
1139
1140 ans=CmdPSKNexWatch("");
1141 if (ans>0) {
1142 PrintAndLog("\nValid NexWatch ID Found!");
1143 return 1;
1144 }
1145
1146 PrintAndLog("\nNo Known Tags Found!\n");
1147 if (testRaw=='u' || testRaw=='U'){
1148 //test unknown tag formats (raw mode)
1149 PrintAndLog("\nChecking for Unknown tags:\n");
1150 ans=AutoCorrelate(4000, FALSE, FALSE);
1151
1152 if (ans > 0) {
1153
1154 PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1155
1156 if ( ans % 8 == 0) {
1157 int bytes = (ans / 8);
1158 PrintAndLog("Possible %d bytes", bytes);
1159 int blocks = 0;
1160 if ( bytes % 2 == 0) {
1161 blocks = (bytes / 2);
1162 PrintAndLog("Possible 2 blocks, width %d", blocks);
1163 }
1164 if ( bytes % 4 == 0) {
1165 blocks = (bytes / 4);
1166 PrintAndLog("Possible 4 blocks, width %d", blocks);
1167 }
1168 if ( bytes % 8 == 0) {
1169 blocks = (bytes / 8);
1170 PrintAndLog("Possible 8 blocks, width %d", blocks);
1171 }
1172 if ( bytes % 16 == 0) {
1173 blocks = (bytes / 16);
1174 PrintAndLog("Possible 16 blocks, width %d", blocks);
1175 }
1176 }
1177 }
1178 ans=GetFskClock("",FALSE,FALSE);
1179 if (ans != 0){ //fsk
1180 ans=FSKrawDemod("",TRUE);
1181 if (ans>0) {
1182 PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1183 return 1;
1184 }
1185 }
1186 ans=ASKDemod("0 0 0",TRUE,FALSE,1);
1187 if (ans>0) {
1188 PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1189 PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1190 return 1;
1191 }
1192 ans=CmdPSK1rawDemod("");
1193 if (ans>0) {
1194 PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1195 PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1196 PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1197 return 1;
1198 }
1199 PrintAndLog("\nNo Data Found!\n");
1200 }
1201 return 0;
1202 }
1203
1204 static command_t CommandTable[] =
1205 {
1206 {"help", CmdHelp, 1, "This help"},
1207 {"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
1208 {"awid", CmdLFAWID, 1, "{ AWID RFIDs... }"},
1209 {"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
1210 {"hitag", CmdLFHitag, 1, "{ HITAG RFIDs... }"},
1211 {"io", CmdLFIO, 1, "{ IOPROX RFIDs... }"},
1212 {"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
1213 {"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
1214 {"t55xx", CmdLFT55XX, 1, "{ T55X7 RFIDs... }"},
1215 {"viking", CmdLFViking, 1, "{ Viking RFIDs... }"},
1216 {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1217
1218 {"cmdread", CmdLFCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h' 134] \n\t\t-- Modulate LF reader field to send command before read (all periods in microseconds)"},
1219 {"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
1220 {"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1221 {"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1222 {"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1223 {"search", CmdLFfind, 1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) \n\t\t- 'u' to search for unknown tags"},
1224 {"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1225 {"simask", CmdLFaskSim, 0, "[clock] [invert <1|0>] [manchester/raw <'m'|'r'>] [msg separator 's'] [d <hexdata>] \n\t\t-- Simulate LF ASK tag from demodbuffer or input"},
1226 {"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
1227 {"simpsk", CmdLFpskSim, 0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] \n\t\t-- Simulate LF PSK tag from demodbuffer or input"},
1228 {"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1229 {"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold] -- Snoop LF (l:125khz, h:134khz)"},
1230 {"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
1231 {NULL, NULL, 0, NULL}
1232 };
1233
1234 int CmdLF(const char *Cmd)
1235 {
1236 CmdsParse(CommandTable, Cmd);
1237 return 0;
1238 }
1239
1240 int CmdHelp(const char *Cmd)
1241 {
1242 CmdsHelp(CommandTable);
1243 return 0;
1244 }
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