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[proxmark3-svn] / client / cmdlf.c
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 clearCommandBuffer();
427 SendCommand(&c);
428 return 0;
429 }
430
431 int usage_lf_read()
432 {
433 PrintAndLog("Usage: lf read");
434 PrintAndLog("Options: ");
435 PrintAndLog(" h This help");
436 PrintAndLog(" s silent run no printout");
437 PrintAndLog("This function takes no arguments. ");
438 PrintAndLog("Use 'lf config' to set parameters.");
439 return 0;
440 }
441 int usage_lf_snoop()
442 {
443 PrintAndLog("Usage: lf snoop");
444 PrintAndLog("Options: ");
445 PrintAndLog(" h This help");
446 PrintAndLog("This function takes no arguments. ");
447 PrintAndLog("Use 'lf config' to set parameters.");
448 return 0;
449 }
450
451 int usage_lf_config()
452 {
453 PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
454 PrintAndLog("Options: ");
455 PrintAndLog(" h This help");
456 PrintAndLog(" L Low frequency (125 KHz)");
457 PrintAndLog(" H High frequency (134 KHz)");
458 PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
459 PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
460 PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
461 PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
462 PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
463 PrintAndLog("Examples:");
464 PrintAndLog(" lf config b 8 L");
465 PrintAndLog(" Samples at 125KHz, 8bps.");
466 PrintAndLog(" lf config H b 4 d 3");
467 PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
468 PrintAndLog(" a resolution of 4 bits per sample.");
469 PrintAndLog(" lf read");
470 PrintAndLog(" Performs a read (active field)");
471 PrintAndLog(" lf snoop");
472 PrintAndLog(" Performs a snoop (no active field)");
473 return 0;
474 }
475
476 int CmdLFSetConfig(const char *Cmd)
477 {
478
479 uint8_t divisor = 0;//Frequency divisor
480 uint8_t bps = 0; // Bits per sample
481 uint8_t decimation = 0; //How many to keep
482 bool averaging = 1; // Defaults to true
483 bool errors = FALSE;
484 int trigger_threshold =-1;//Means no change
485 uint8_t unsigned_trigg = 0;
486
487 uint8_t cmdp =0;
488 while(param_getchar(Cmd, cmdp) != 0x00)
489 {
490 switch(param_getchar(Cmd, cmdp))
491 {
492 case 'h':
493 return usage_lf_config();
494 case 'H':
495 divisor = 88;
496 cmdp++;
497 break;
498 case 'L':
499 divisor = 95;
500 cmdp++;
501 break;
502 case 'q':
503 errors |= param_getdec(Cmd,cmdp+1,&divisor);
504 cmdp+=2;
505 break;
506 case 't':
507 errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
508 cmdp+=2;
509 if(!errors) trigger_threshold = unsigned_trigg;
510 break;
511 case 'b':
512 errors |= param_getdec(Cmd,cmdp+1,&bps);
513 cmdp+=2;
514 break;
515 case 'd':
516 errors |= param_getdec(Cmd,cmdp+1,&decimation);
517 cmdp+=2;
518 break;
519 case 'a':
520 averaging = param_getchar(Cmd,cmdp+1) == '1';
521 cmdp+=2;
522 break;
523 default:
524 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
525 errors = 1;
526 break;
527 }
528 if(errors) break;
529 }
530 if(cmdp == 0)
531 {
532 errors = 1;// No args
533 }
534
535 //Validations
536 if(errors)
537 {
538 return usage_lf_config();
539 }
540 //Bps is limited to 8, so fits in lower half of arg1
541 if(bps >> 8) bps = 8;
542
543 sample_config config = {
544 decimation,bps,averaging,divisor,trigger_threshold
545 };
546 //Averaging is a flag on high-bit of arg[1]
547 UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
548 memcpy(c.d.asBytes,&config,sizeof(sample_config));
549 clearCommandBuffer();
550 SendCommand(&c);
551 return 0;
552 }
553
554 int CmdLFRead(const char *Cmd)
555 {
556
557 uint8_t cmdp = 0;
558 bool arg1 = false;
559 if (param_getchar(Cmd, cmdp) == 'h')
560 {
561 return usage_lf_read();
562 }
563 if (param_getchar(Cmd, cmdp) == 's') arg1 = true; //suppress print
564 //And ship it to device
565 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
566 clearCommandBuffer();
567 SendCommand(&c);
568 //WaitForResponse(CMD_ACK,NULL);
569 if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
570 PrintAndLog("command execution time out");
571 return 1;
572 }
573
574 return 0;
575 }
576
577 int CmdLFSnoop(const char *Cmd)
578 {
579 uint8_t cmdp =0;
580 if(param_getchar(Cmd, cmdp) == 'h')
581 {
582 return usage_lf_snoop();
583 }
584
585 UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
586 clearCommandBuffer();
587 SendCommand(&c);
588 WaitForResponse(CMD_ACK,NULL);
589 return 0;
590 }
591
592 static void ChkBitstream(const char *str)
593 {
594 int i;
595
596 /* convert to bitstream if necessary */
597 for (i = 0; i < (int)(GraphTraceLen / 2); i++){
598 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
599 CmdGetBitStream("");
600 break;
601 }
602 }
603 }
604 //Attempt to simulate any wave in buffer (one bit per output sample)
605 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
606 int CmdLFSim(const char *Cmd)
607 {
608 int i,j;
609 static int gap;
610
611 sscanf(Cmd, "%i", &gap);
612
613 // convert to bitstream if necessary
614
615 ChkBitstream(Cmd);
616
617 //can send only 512 bits at a time (1 byte sent per bit...)
618 printf("Sending [%d bytes]", GraphTraceLen);
619 for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
620 UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
621
622 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
623 c.d.asBytes[j] = GraphBuffer[i+j];
624 }
625 SendCommand(&c);
626 WaitForResponse(CMD_ACK,NULL);
627 printf(".");
628 }
629
630 printf("\n");
631 PrintAndLog("Starting to simulate");
632 UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
633 clearCommandBuffer();
634 SendCommand(&c);
635 return 0;
636 }
637
638 int usage_lf_simfsk(void)
639 {
640 //print help
641 PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
642 PrintAndLog("Options: ");
643 PrintAndLog(" h This help");
644 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
645 PrintAndLog(" i invert data");
646 PrintAndLog(" H <fcHigh> Manually set the larger Field Clock");
647 PrintAndLog(" L <fcLow> Manually set the smaller Field Clock");
648 //PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
649 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
650 PrintAndLog("\n NOTE: if you set one clock manually set them all manually");
651 return 0;
652 }
653
654 int usage_lf_simask(void)
655 {
656 //print help
657 PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
658 PrintAndLog("Options: ");
659 PrintAndLog(" h This help");
660 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
661 PrintAndLog(" i invert data");
662 PrintAndLog(" b sim ask/biphase");
663 PrintAndLog(" m sim ask/manchester - Default");
664 PrintAndLog(" r sim ask/raw");
665 PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
666 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
667 return 0;
668 }
669
670 int usage_lf_simpsk(void)
671 {
672 //print help
673 PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
674 PrintAndLog("Options: ");
675 PrintAndLog(" h This help");
676 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
677 PrintAndLog(" i invert data");
678 PrintAndLog(" 1 set PSK1 (default)");
679 PrintAndLog(" 2 set PSK2");
680 PrintAndLog(" 3 set PSK3");
681 PrintAndLog(" r <carrier> 2|4|8 are valid carriers: default = 2");
682 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
683 return 0;
684 }
685
686 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
687 // - allow pull data from DemodBuffer
688 int CmdLFfskSim(const char *Cmd)
689 {
690 //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
691 // otherwise will need FChigh, FClow, Clock, and bitstream
692 uint8_t fcHigh=0, fcLow=0, clk=0;
693 uint8_t invert=0;
694 bool errors = FALSE;
695 char hexData[32] = {0x00}; // store entered hex data
696 uint8_t data[255] = {0x00};
697 int dataLen = 0;
698 uint8_t cmdp = 0;
699 while(param_getchar(Cmd, cmdp) != 0x00)
700 {
701 switch(param_getchar(Cmd, cmdp))
702 {
703 case 'h':
704 return usage_lf_simfsk();
705 case 'i':
706 invert = 1;
707 cmdp++;
708 break;
709 case 'c':
710 errors |= param_getdec(Cmd,cmdp+1,&clk);
711 cmdp+=2;
712 break;
713 case 'H':
714 errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
715 cmdp+=2;
716 break;
717 case 'L':
718 errors |= param_getdec(Cmd,cmdp+1,&fcLow);
719 cmdp+=2;
720 break;
721 //case 's':
722 // separator=1;
723 // cmdp++;
724 // break;
725 case 'd':
726 dataLen = param_getstr(Cmd, cmdp+1, hexData);
727 if (dataLen==0) {
728 errors=TRUE;
729 } else {
730 dataLen = hextobinarray((char *)data, hexData);
731 }
732 if (dataLen==0) errors=TRUE;
733 if (errors) PrintAndLog ("Error getting hex data");
734 cmdp+=2;
735 break;
736 default:
737 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
738 errors = TRUE;
739 break;
740 }
741 if(errors) break;
742 }
743 if(cmdp == 0 && DemodBufferLen == 0)
744 {
745 errors = TRUE;// No args
746 }
747
748 //Validations
749 if(errors)
750 {
751 return usage_lf_simfsk();
752 }
753
754 if (dataLen == 0){ //using DemodBuffer
755 if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
756 uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
757 if (ans==0){
758 if (!fcHigh) fcHigh=10;
759 if (!fcLow) fcLow=8;
760 if (!clk) clk=50;
761 }
762 }
763 } else {
764 setDemodBuf(data, dataLen, 0);
765 }
766
767 //default if not found
768 if (clk == 0) clk = 50;
769 if (fcHigh == 0) fcHigh = 10;
770 if (fcLow == 0) fcLow = 8;
771
772 uint16_t arg1, arg2;
773 arg1 = fcHigh << 8 | fcLow;
774 arg2 = invert << 8 | clk;
775 size_t size = DemodBufferLen;
776 if (size > USB_CMD_DATA_SIZE) {
777 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
778 size = USB_CMD_DATA_SIZE;
779 }
780 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
781
782 memcpy(c.d.asBytes, DemodBuffer, size);
783 clearCommandBuffer();
784 SendCommand(&c);
785 return 0;
786 }
787
788 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
789 // - allow pull data from DemodBuffer
790 int CmdLFaskSim(const char *Cmd)
791 {
792 //autodetect clock from Graphbuffer if using demod buffer
793 // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
794 uint8_t encoding = 1, separator = 0;
795 uint8_t clk=0, invert=0;
796 bool errors = FALSE;
797 char hexData[32] = {0x00};
798 uint8_t data[255]= {0x00}; // store entered hex data
799 int dataLen = 0;
800 uint8_t cmdp = 0;
801 while(param_getchar(Cmd, cmdp) != 0x00)
802 {
803 switch(param_getchar(Cmd, cmdp))
804 {
805 case 'h':
806 return usage_lf_simask();
807 case 'i':
808 invert = 1;
809 cmdp++;
810 break;
811 case 'c':
812 errors |= param_getdec(Cmd,cmdp+1,&clk);
813 cmdp+=2;
814 break;
815 case 'b':
816 encoding=2; //biphase
817 cmdp++;
818 break;
819 case 'm':
820 encoding=1;
821 cmdp++;
822 break;
823 case 'r':
824 encoding=0;
825 cmdp++;
826 break;
827 case 's':
828 separator=1;
829 cmdp++;
830 break;
831 case 'd':
832 dataLen = param_getstr(Cmd, cmdp+1, hexData);
833 if (dataLen==0) {
834 errors=TRUE;
835 } else {
836 dataLen = hextobinarray((char *)data, hexData);
837 }
838 if (dataLen==0) errors=TRUE;
839 if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
840 cmdp+=2;
841 break;
842 default:
843 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
844 errors = TRUE;
845 break;
846 }
847 if(errors) break;
848 }
849 if(cmdp == 0 && DemodBufferLen == 0)
850 {
851 errors = TRUE;// No args
852 }
853
854 //Validations
855 if(errors)
856 {
857 return usage_lf_simask();
858 }
859 if (dataLen == 0){ //using DemodBuffer
860 if (clk == 0) clk = GetAskClock("0", false, false);
861 } else {
862 setDemodBuf(data, dataLen, 0);
863 }
864 if (clk == 0) clk = 64;
865 if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
866 uint16_t arg1, arg2;
867 size_t size=DemodBufferLen;
868 arg1 = clk << 8 | encoding;
869 arg2 = invert << 8 | separator;
870 if (size > USB_CMD_DATA_SIZE) {
871 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
872 size = USB_CMD_DATA_SIZE;
873 }
874 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
875 PrintAndLog("preparing to sim ask data: %d bits", size);
876 memcpy(c.d.asBytes, DemodBuffer, size);
877 clearCommandBuffer();
878 SendCommand(&c);
879 return 0;
880 }
881
882 // by marshmellow - sim psk data given carrier, clock, invert
883 // - allow pull data from DemodBuffer or parameters
884 int CmdLFpskSim(const char *Cmd)
885 {
886 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
887 //will need carrier, Clock, and bitstream
888 uint8_t carrier=0, clk=0;
889 uint8_t invert=0;
890 bool errors = FALSE;
891 char hexData[32] = {0x00}; // store entered hex data
892 uint8_t data[255] = {0x00};
893 int dataLen = 0;
894 uint8_t cmdp = 0;
895 uint8_t pskType = 1;
896 while(param_getchar(Cmd, cmdp) != 0x00)
897 {
898 switch(param_getchar(Cmd, cmdp))
899 {
900 case 'h':
901 return usage_lf_simpsk();
902 case 'i':
903 invert = 1;
904 cmdp++;
905 break;
906 case 'c':
907 errors |= param_getdec(Cmd,cmdp+1,&clk);
908 cmdp+=2;
909 break;
910 case 'r':
911 errors |= param_getdec(Cmd,cmdp+1,&carrier);
912 cmdp+=2;
913 break;
914 case '1':
915 pskType=1;
916 cmdp++;
917 break;
918 case '2':
919 pskType=2;
920 cmdp++;
921 break;
922 case '3':
923 pskType=3;
924 cmdp++;
925 break;
926 case 'd':
927 dataLen = param_getstr(Cmd, cmdp+1, hexData);
928 if (dataLen==0) {
929 errors=TRUE;
930 } else {
931 dataLen = hextobinarray((char *)data, hexData);
932 }
933 if (dataLen==0) errors=TRUE;
934 if (errors) PrintAndLog ("Error getting hex data");
935 cmdp+=2;
936 break;
937 default:
938 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
939 errors = TRUE;
940 break;
941 }
942 if (errors) break;
943 }
944 if (cmdp == 0 && DemodBufferLen == 0)
945 {
946 errors = TRUE;// No args
947 }
948
949 //Validations
950 if (errors)
951 {
952 return usage_lf_simpsk();
953 }
954 if (dataLen == 0){ //using DemodBuffer
955 PrintAndLog("Getting Clocks");
956 if (clk==0) clk = GetPskClock("", FALSE, FALSE);
957 PrintAndLog("clk: %d",clk);
958 if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
959 PrintAndLog("carrier: %d", carrier);
960 } else {
961 setDemodBuf(data, dataLen, 0);
962 }
963
964 if (clk <= 0) clk = 32;
965 if (carrier == 0) carrier = 2;
966 if (pskType != 1){
967 if (pskType == 2){
968 //need to convert psk2 to psk1 data before sim
969 psk2TOpsk1(DemodBuffer, DemodBufferLen);
970 } else {
971 PrintAndLog("Sorry, PSK3 not yet available");
972 }
973 }
974 uint16_t arg1, arg2;
975 arg1 = clk << 8 | carrier;
976 arg2 = invert;
977 size_t size=DemodBufferLen;
978 if (size > USB_CMD_DATA_SIZE) {
979 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
980 size=USB_CMD_DATA_SIZE;
981 }
982 UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
983 PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
984 memcpy(c.d.asBytes, DemodBuffer, size);
985 clearCommandBuffer();
986 SendCommand(&c);
987
988 return 0;
989 }
990
991 int CmdLFSimBidir(const char *Cmd)
992 {
993 // Set ADC to twice the carrier for a slight supersampling
994 // HACK: not implemented in ARMSRC.
995 PrintAndLog("Not implemented yet.");
996 UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
997 SendCommand(&c);
998 return 0;
999 }
1000
1001 int CmdVchDemod(const char *Cmd)
1002 {
1003 // Is this the entire sync pattern, or does this also include some
1004 // data bits that happen to be the same everywhere? That would be
1005 // lovely to know.
1006 static const int SyncPattern[] = {
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 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 };
1018
1019 // So first, we correlate for the sync pattern, and mark that.
1020 int bestCorrel = 0, bestPos = 0;
1021 int i;
1022 // It does us no good to find the sync pattern, with fewer than
1023 // 2048 samples after it...
1024 for (i = 0; i < (GraphTraceLen-2048); i++) {
1025 int sum = 0;
1026 int j;
1027 for (j = 0; j < arraylen(SyncPattern); j++) {
1028 sum += GraphBuffer[i+j]*SyncPattern[j];
1029 }
1030 if (sum > bestCorrel) {
1031 bestCorrel = sum;
1032 bestPos = i;
1033 }
1034 }
1035 PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
1036
1037 char bits[257];
1038 bits[256] = '\0';
1039
1040 int worst = INT_MAX;
1041 int worstPos = 0;
1042
1043 for (i = 0; i < 2048; i += 8) {
1044 int sum = 0;
1045 int j;
1046 for (j = 0; j < 8; j++) {
1047 sum += GraphBuffer[bestPos+i+j];
1048 }
1049 if (sum < 0) {
1050 bits[i/8] = '.';
1051 } else {
1052 bits[i/8] = '1';
1053 }
1054 if(abs(sum) < worst) {
1055 worst = abs(sum);
1056 worstPos = i;
1057 }
1058 }
1059 PrintAndLog("bits:");
1060 PrintAndLog("%s", bits);
1061 PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1062
1063 if (strcmp(Cmd, "clone")==0) {
1064 GraphTraceLen = 0;
1065 char *s;
1066 for(s = bits; *s; s++) {
1067 int j;
1068 for(j = 0; j < 16; j++) {
1069 GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1070 }
1071 }
1072 RepaintGraphWindow();
1073 }
1074 return 0;
1075 }
1076
1077 //by marshmellow
1078 int CmdLFfind(const char *Cmd)
1079 {
1080 int ans=0;
1081 char cmdp = param_getchar(Cmd, 0);
1082 char testRaw = param_getchar(Cmd, 1);
1083 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1084 PrintAndLog("Usage: lf search <0|1> [u]");
1085 PrintAndLog(" <use data from Graphbuffer> , if not set, try reading data from tag.");
1086 PrintAndLog(" [Search for Unknown tags] , if not set, reads only known tags.");
1087 PrintAndLog("");
1088 PrintAndLog(" sample: lf search = try reading data from tag & search for known tags");
1089 PrintAndLog(" : lf search 1 = use data from GraphBuffer & search for known tags");
1090 PrintAndLog(" : lf search u = try reading data from tag & search for known and unknown tags");
1091 PrintAndLog(" : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1092
1093 return 0;
1094 }
1095
1096 if (!offline && (cmdp != '1')){
1097 CmdLFRead("s");
1098 getSamples("30000",false);
1099 } else if (GraphTraceLen < 1000) {
1100 PrintAndLog("Data in Graphbuffer was too small.");
1101 return 0;
1102 }
1103 if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1104
1105 PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
1106 PrintAndLog("False Positives ARE possible\n");
1107 PrintAndLog("\nChecking for known tags:\n");
1108
1109 ans=CmdFSKdemodIO("");
1110 if (ans>0) {
1111 PrintAndLog("\nValid IO Prox ID Found!");
1112 return 1;
1113 }
1114
1115 ans=CmdFSKdemodPyramid("");
1116 if (ans>0) {
1117 PrintAndLog("\nValid Pyramid ID Found!");
1118 return 1;
1119 }
1120
1121 ans=CmdFSKdemodParadox("");
1122 if (ans>0) {
1123 PrintAndLog("\nValid Paradox ID Found!");
1124 return 1;
1125 }
1126
1127 ans=CmdFSKdemodAWID("");
1128 if (ans>0) {
1129 PrintAndLog("\nValid AWID ID Found!");
1130 return 1;
1131 }
1132
1133 ans=CmdFSKdemodHID("");
1134 if (ans>0) {
1135 PrintAndLog("\nValid HID Prox ID Found!");
1136 return 1;
1137 }
1138
1139 ans=CmdAskEM410xDemod("");
1140 if (ans>0) {
1141 PrintAndLog("\nValid EM410x ID Found!");
1142 return 1;
1143 }
1144
1145 ans=CmdG_Prox_II_Demod("");
1146 if (ans>0) {
1147 PrintAndLog("\nValid G Prox II ID Found!");
1148 return 1;
1149 }
1150
1151 ans=CmdFDXBdemodBI("");
1152 if (ans>0) {
1153 PrintAndLog("\nValid FDX-B ID Found!");
1154 return 1;
1155 }
1156
1157 ans=EM4x50Read("", false);
1158 if (ans>0) {
1159 PrintAndLog("\nValid EM4x50 ID Found!");
1160 return 1;
1161 }
1162
1163 ans=CmdVikingDemod("");
1164 if (ans>0) {
1165 PrintAndLog("\nValid Viking ID Found!");
1166 return 1;
1167 }
1168
1169 ans=CmdIndalaDecode("");
1170 if (ans>0) {
1171 PrintAndLog("\nValid Indala ID Found!");
1172 return 1;
1173 }
1174
1175 ans=CmdPSKNexWatch("");
1176 if (ans>0) {
1177 PrintAndLog("\nValid NexWatch ID Found!");
1178 return 1;
1179 }
1180
1181 PrintAndLog("\nNo Known Tags Found!\n");
1182 if (testRaw=='u' || testRaw=='U'){
1183 //test unknown tag formats (raw mode)
1184 PrintAndLog("\nChecking for Unknown tags:\n");
1185 ans=AutoCorrelate(4000, FALSE, FALSE);
1186 if (ans > 0) PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1187 ans=GetFskClock("",FALSE,FALSE);
1188 if (ans != 0){ //fsk
1189 ans=FSKrawDemod("",TRUE);
1190 if (ans>0) {
1191 PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1192 return 1;
1193 }
1194 }
1195 ans=ASKDemod("0 0 0",TRUE,FALSE,1);
1196 if (ans>0) {
1197 PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1198 PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1199 return 1;
1200 }
1201 ans=CmdPSK1rawDemod("");
1202 if (ans>0) {
1203 PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1204 PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1205 PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1206 return 1;
1207 }
1208 PrintAndLog("\nNo Data Found!\n");
1209 }
1210 return 0;
1211 }
1212
1213 static command_t CommandTable[] =
1214 {
1215 {"help", CmdHelp, 1, "This help"},
1216 {"awid", CmdLFAWID, 1, "{ AWID RFIDs... }"},
1217 {"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
1218 {"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
1219 {"hitag", CmdLFHitag, 1, "{ Hitag tags and transponders... }"},
1220 {"io", CmdLFIO, 1, "{ ioProx tags... }"},
1221 {"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
1222 {"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
1223 {"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
1224 {"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)"},
1225 {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1226 {"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
1227 {"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1228 {"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1229 {"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1230 {"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"},
1231 {"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1232 {"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"},
1233 {"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] -- Simulate LF FSK tag from demodbuffer or input"},
1234 {"simpsk", CmdLFpskSim, 0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] -- Simulate LF PSK tag from demodbuffer or input"},
1235 {"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1236 {"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1237 {"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
1238 {NULL, NULL, 0, NULL}
1239 };
1240
1241 int CmdLF(const char *Cmd)
1242 {
1243 CmdsParse(CommandTable, Cmd);
1244 return 0;
1245 }
1246
1247 int CmdHelp(const char *Cmd)
1248 {
1249 CmdsHelp(CommandTable);
1250 return 0;
1251 }
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