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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 "cmdlfti.h"
26 #include "cmdlfem4x.h"
27 #include "cmdlfhitag.h"
28 #include "cmdlft55xx.h"
29 #include "cmdlfpcf7931.h"
30 #include "cmdlfio.h"
31 #include "lfdemod.h"
32
33 static int CmdHelp(const char *Cmd);
34
35 /* send a command before reading */
36 int CmdLFCommandRead(const char *Cmd)
37 {
38 static char dummy[3];
39
40 dummy[0]= ' ';
41
42 UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
43 sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char*)(&c.d.asBytes),(char*)(&dummy+1));
44 // in case they specified 'h'
45 strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
46 SendCommand(&c);
47 return 0;
48 }
49
50 int CmdFlexdemod(const char *Cmd)
51 {
52 int i;
53 for (i = 0; i < GraphTraceLen; ++i) {
54 if (GraphBuffer[i] < 0) {
55 GraphBuffer[i] = -1;
56 } else {
57 GraphBuffer[i] = 1;
58 }
59 }
60
61 #define LONG_WAIT 100
62 int start;
63 for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
64 int first = GraphBuffer[start];
65 for (i = start; i < start + LONG_WAIT; i++) {
66 if (GraphBuffer[i] != first) {
67 break;
68 }
69 }
70 if (i == (start + LONG_WAIT)) {
71 break;
72 }
73 }
74 if (start == GraphTraceLen - LONG_WAIT) {
75 PrintAndLog("nothing to wait for");
76 return 0;
77 }
78
79 GraphBuffer[start] = 2;
80 GraphBuffer[start+1] = -2;
81 uint8_t bits[64] = {0x00};
82
83 int bit, sum;
84 i = start;
85 for (bit = 0; bit < 64; bit++) {
86 sum = 0;
87 for (int j = 0; j < 16; j++) {
88 sum += GraphBuffer[i++];
89 }
90
91 bits[bit] = (sum > 0) ? 1 : 0;
92
93 PrintAndLog("bit %d sum %d", bit, sum);
94 }
95
96 for (bit = 0; bit < 64; bit++) {
97 int j;
98 int sum = 0;
99 for (j = 0; j < 16; j++) {
100 sum += GraphBuffer[i++];
101 }
102 if (sum > 0 && bits[bit] != 1) {
103 PrintAndLog("oops1 at %d", bit);
104 }
105 if (sum < 0 && bits[bit] != 0) {
106 PrintAndLog("oops2 at %d", bit);
107 }
108 }
109
110 // HACK writing back to graphbuffer.
111 GraphTraceLen = 32*64;
112 i = 0;
113 int phase = 0;
114 for (bit = 0; bit < 64; bit++) {
115
116 phase = (bits[bit] == 0) ? 0 : 1;
117
118 int j;
119 for (j = 0; j < 32; j++) {
120 GraphBuffer[i++] = phase;
121 phase = !phase;
122 }
123 }
124
125 RepaintGraphWindow();
126 return 0;
127 }
128
129 int CmdIndalaDemod(const char *Cmd)
130 {
131 // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
132
133 int state = -1;
134 int count = 0;
135 int i, j;
136
137 // worst case with GraphTraceLen=64000 is < 4096
138 // under normal conditions it's < 2048
139
140 uint8_t rawbits[4096];
141 int rawbit = 0;
142 int worst = 0, worstPos = 0;
143 // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
144 for (i = 0; i < GraphTraceLen-1; i += 2) {
145 count += 1;
146 if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
147 if (state == 0) {
148 for (j = 0; j < count - 8; j += 16) {
149 rawbits[rawbit++] = 0;
150 }
151 if ((abs(count - j)) > worst) {
152 worst = abs(count - j);
153 worstPos = i;
154 }
155 }
156 state = 1;
157 count = 0;
158 } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
159 if (state == 1) {
160 for (j = 0; j < count - 8; j += 16) {
161 rawbits[rawbit++] = 1;
162 }
163 if ((abs(count - j)) > worst) {
164 worst = abs(count - j);
165 worstPos = i;
166 }
167 }
168 state = 0;
169 count = 0;
170 }
171 }
172
173 if (rawbit>0){
174 PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
175 PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
176 } else {
177 return 0;
178 }
179
180 // Finding the start of a UID
181 int uidlen, long_wait;
182 if (strcmp(Cmd, "224") == 0) {
183 uidlen = 224;
184 long_wait = 30;
185 } else {
186 uidlen = 64;
187 long_wait = 29;
188 }
189
190 int start;
191 int first = 0;
192 for (start = 0; start <= rawbit - uidlen; start++) {
193 first = rawbits[start];
194 for (i = start; i < start + long_wait; i++) {
195 if (rawbits[i] != first) {
196 break;
197 }
198 }
199 if (i == (start + long_wait)) {
200 break;
201 }
202 }
203
204 if (start == rawbit - uidlen + 1) {
205 PrintAndLog("nothing to wait for");
206 return 0;
207 }
208
209 // Inverting signal if needed
210 if (first == 1) {
211 for (i = start; i < rawbit; i++) {
212 rawbits[i] = !rawbits[i];
213 }
214 }
215
216 // Dumping UID
217 uint8_t bits[224] = {0x00};
218 char showbits[225] = {0x00};
219 int bit;
220 i = start;
221 int times = 0;
222
223 if (uidlen > rawbit) {
224 PrintAndLog("Warning: not enough raw bits to get a full UID");
225 for (bit = 0; bit < rawbit; bit++) {
226 bits[bit] = rawbits[i++];
227 // As we cannot know the parity, let's use "." and "/"
228 showbits[bit] = '.' + bits[bit];
229 }
230 showbits[bit+1]='\0';
231 PrintAndLog("Partial UID=%s", showbits);
232 return 0;
233 } else {
234 for (bit = 0; bit < uidlen; bit++) {
235 bits[bit] = rawbits[i++];
236 showbits[bit] = '0' + bits[bit];
237 }
238 times = 1;
239 }
240
241 //convert UID to HEX
242 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
243 int idx;
244 uid1 = uid2 = 0;
245
246 if (uidlen==64){
247 for( idx=0; idx<64; idx++) {
248 if (showbits[idx] == '0') {
249 uid1=(uid1<<1)|(uid2>>31);
250 uid2=(uid2<<1)|0;
251 } else {
252 uid1=(uid1<<1)|(uid2>>31);
253 uid2=(uid2<<1)|1;
254 }
255 }
256 PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
257 }
258 else {
259 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
260
261 for( idx=0; idx<224; idx++) {
262 uid1=(uid1<<1)|(uid2>>31);
263 uid2=(uid2<<1)|(uid3>>31);
264 uid3=(uid3<<1)|(uid4>>31);
265 uid4=(uid4<<1)|(uid5>>31);
266 uid5=(uid5<<1)|(uid6>>31);
267 uid6=(uid6<<1)|(uid7>>31);
268
269 if (showbits[idx] == '0')
270 uid7 = (uid7<<1) | 0;
271 else
272 uid7 = (uid7<<1) | 1;
273 }
274 PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
275 }
276
277 // Checking UID against next occurrences
278 int failed = 0;
279 for (; i + uidlen <= rawbit;) {
280 failed = 0;
281 for (bit = 0; bit < uidlen; bit++) {
282 if (bits[bit] != rawbits[i++]) {
283 failed = 1;
284 break;
285 }
286 }
287 if (failed == 1) {
288 break;
289 }
290 times += 1;
291 }
292
293 PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
294
295 // Remodulating for tag cloning
296 // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
297 // since this changes graphbuffer data.
298 GraphTraceLen = 32*uidlen;
299 i = 0;
300 int phase = 0;
301 for (bit = 0; bit < uidlen; bit++) {
302 if (bits[bit] == 0) {
303 phase = 0;
304 } else {
305 phase = 1;
306 }
307 int j;
308 for (j = 0; j < 32; j++) {
309 GraphBuffer[i++] = phase;
310 phase = !phase;
311 }
312 }
313
314 RepaintGraphWindow();
315 return 1;
316 }
317
318 int CmdIndalaClone(const char *Cmd)
319 {
320 UsbCommand c;
321 unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
322
323 uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
324 int n = 0, i = 0;
325
326 if (strchr(Cmd,'l') != 0) {
327 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
328 uid1 = (uid1 << 4) | (uid2 >> 28);
329 uid2 = (uid2 << 4) | (uid3 >> 28);
330 uid3 = (uid3 << 4) | (uid4 >> 28);
331 uid4 = (uid4 << 4) | (uid5 >> 28);
332 uid5 = (uid5 << 4) | (uid6 >> 28);
333 uid6 = (uid6 << 4) | (uid7 >> 28);
334 uid7 = (uid7 << 4) | (n & 0xf);
335 }
336 PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
337 c.cmd = CMD_INDALA_CLONE_TAG_L;
338 c.d.asDwords[0] = uid1;
339 c.d.asDwords[1] = uid2;
340 c.d.asDwords[2] = uid3;
341 c.d.asDwords[3] = uid4;
342 c.d.asDwords[4] = uid5;
343 c.d.asDwords[5] = uid6;
344 c.d.asDwords[6] = uid7;
345 } else {
346 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
347 uid1 = (uid1 << 4) | (uid2 >> 28);
348 uid2 = (uid2 << 4) | (n & 0xf);
349 }
350 PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
351 c.cmd = CMD_INDALA_CLONE_TAG;
352 c.arg[0] = uid1;
353 c.arg[1] = uid2;
354 }
355
356 SendCommand(&c);
357 return 0;
358 }
359
360 int usage_lf_read()
361 {
362 PrintAndLog("Usage: lf read");
363 PrintAndLog("Options: ");
364 PrintAndLog(" h This help");
365 PrintAndLog(" s silent run no printout");
366 PrintAndLog("This function takes no arguments. ");
367 PrintAndLog("Use 'lf config' to set parameters.");
368 return 0;
369 }
370 int usage_lf_snoop()
371 {
372 PrintAndLog("Usage: lf snoop");
373 PrintAndLog("Options: ");
374 PrintAndLog(" h This help");
375 PrintAndLog("This function takes no arguments. ");
376 PrintAndLog("Use 'lf config' to set parameters.");
377 return 0;
378 }
379
380 int usage_lf_config()
381 {
382 PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
383 PrintAndLog("Options: ");
384 PrintAndLog(" h This help");
385 PrintAndLog(" L Low frequency (125 KHz)");
386 PrintAndLog(" H High frequency (134 KHz)");
387 PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
388 PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
389 PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
390 PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
391 PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold");
392 PrintAndLog("Examples:");
393 PrintAndLog(" lf config b 8 L");
394 PrintAndLog(" Samples at 125KHz, 8bps.");
395 PrintAndLog(" lf config H b 4 d 3");
396 PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
397 PrintAndLog(" a resolution of 4 bits per sample.");
398 PrintAndLog(" lf read");
399 PrintAndLog(" Performs a read (active field)");
400 PrintAndLog(" lf snoop");
401 PrintAndLog(" Performs a snoop (no active field)");
402 return 0;
403 }
404
405 int CmdLFSetConfig(const char *Cmd)
406 {
407
408 uint8_t divisor = 0;//Frequency divisor
409 uint8_t bps = 0; // Bits per sample
410 uint8_t decimation = 0; //How many to keep
411 bool averaging = 1; // Defaults to true
412 bool errors = FALSE;
413 int trigger_threshold =-1;//Means no change
414 uint8_t unsigned_trigg = 0;
415
416 uint8_t cmdp =0;
417 while(param_getchar(Cmd, cmdp) != 0x00)
418 {
419 switch(param_getchar(Cmd, cmdp))
420 {
421 case 'h':
422 return usage_lf_config();
423 case 'H':
424 divisor = 88;
425 cmdp++;
426 break;
427 case 'L':
428 divisor = 95;
429 cmdp++;
430 break;
431 case 'q':
432 errors |= param_getdec(Cmd,cmdp+1,&divisor);
433 cmdp+=2;
434 break;
435 case 't':
436 errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
437 cmdp+=2;
438 if(!errors) trigger_threshold = unsigned_trigg;
439 break;
440 case 'b':
441 errors |= param_getdec(Cmd,cmdp+1,&bps);
442 cmdp+=2;
443 break;
444 case 'd':
445 errors |= param_getdec(Cmd,cmdp+1,&decimation);
446 cmdp+=2;
447 break;
448 case 'a':
449 averaging = param_getchar(Cmd,cmdp+1) == '1';
450 cmdp+=2;
451 break;
452 default:
453 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
454 errors = 1;
455 break;
456 }
457 if(errors) break;
458 }
459 if(cmdp == 0)
460 {
461 errors = 1;// No args
462 }
463
464 //Validations
465 if(errors)
466 {
467 return usage_lf_config();
468 }
469 //Bps is limited to 8, so fits in lower half of arg1
470 if(bps >> 8) bps = 8;
471
472 sample_config config = {
473 decimation,bps,averaging,divisor,trigger_threshold
474 };
475 //Averaging is a flag on high-bit of arg[1]
476 UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
477 memcpy(c.d.asBytes,&config,sizeof(sample_config));
478 SendCommand(&c);
479 return 0;
480 }
481
482 int CmdLFRead(const char *Cmd)
483 {
484
485 uint8_t cmdp = 0;
486 bool arg1 = false;
487 if (param_getchar(Cmd, cmdp) == 'h')
488 {
489 return usage_lf_read();
490 }
491 if (param_getchar(Cmd, cmdp) == 's') arg1 = true; //suppress print
492 //And ship it to device
493 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
494 SendCommand(&c);
495 WaitForResponse(CMD_ACK,NULL);
496 return 0;
497 }
498
499 int CmdLFSnoop(const char *Cmd)
500 {
501 uint8_t cmdp =0;
502 if(param_getchar(Cmd, cmdp) == 'h')
503 {
504 return usage_lf_snoop();
505 }
506
507 UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
508 SendCommand(&c);
509 WaitForResponse(CMD_ACK,NULL);
510 return 0;
511 }
512
513 static void ChkBitstream(const char *str)
514 {
515 int i;
516
517 /* convert to bitstream if necessary */
518 for (i = 0; i < (int)(GraphTraceLen / 2); i++){
519 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
520 CmdGetBitStream("");
521 break;
522 }
523 }
524 }
525 //appears to attempt to simulate manchester
526 int CmdLFSim(const char *Cmd)
527 {
528 int i,j;
529 static int gap;
530
531 sscanf(Cmd, "%i", &gap);
532
533 /* convert to bitstream if necessary */
534
535 ChkBitstream(Cmd);
536
537 //can send 512 bits at a time (1 byte sent per bit...)
538 printf("Sending [%d bytes]", GraphTraceLen);
539 for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
540 UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
541
542 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
543 c.d.asBytes[j] = GraphBuffer[i+j];
544 }
545 SendCommand(&c);
546 WaitForResponse(CMD_ACK,NULL);
547 printf(".");
548 }
549
550 printf("\n");
551 PrintAndLog("Starting to simulate");
552 UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
553 SendCommand(&c);
554 return 0;
555 }
556
557 int usage_lf_simfsk(void)
558 {
559 //print help
560 PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
561 PrintAndLog("Options: ");
562 PrintAndLog(" h This help");
563 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
564 PrintAndLog(" i invert data");
565 PrintAndLog(" H <fcHigh> Manually set the larger Field Clock");
566 PrintAndLog(" L <fcLow> Manually set the smaller Field Clock");
567 //PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
568 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
569 PrintAndLog("\n NOTE: if you set one clock manually set them all manually");
570 return 0;
571 }
572
573 int usage_lf_simask(void)
574 {
575 //print help
576 PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
577 PrintAndLog("Options: ");
578 PrintAndLog(" h This help");
579 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
580 PrintAndLog(" i invert data");
581 PrintAndLog(" b sim ask/biphase");
582 PrintAndLog(" m sim ask/manchester - Default");
583 PrintAndLog(" r sim ask/raw");
584 PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
585 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
586 return 0;
587 }
588
589 int usage_lf_simpsk(void)
590 {
591 //print help
592 PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
593 PrintAndLog("Options: ");
594 PrintAndLog(" h This help");
595 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
596 PrintAndLog(" i invert data");
597 PrintAndLog(" 1 set PSK1 (default)");
598 PrintAndLog(" 2 set PSK2");
599 PrintAndLog(" 3 set PSK3");
600 PrintAndLog(" r <carrier> 2|4|8 are valid carriers: default = 2");
601 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
602 return 0;
603 }
604
605 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
606 // - allow pull data from DemodBuffer
607 int CmdLFfskSim(const char *Cmd)
608 {
609 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
610 //will need FChigh, FClow, Clock, and bitstream
611 uint8_t fcHigh=0, fcLow=0, clk=0;
612 uint8_t invert=0;
613 bool errors = FALSE;
614 char hexData[32] = {0x00}; // store entered hex data
615 uint8_t data[255] = {0x00};
616 int dataLen = 0;
617 uint8_t cmdp = 0;
618 while(param_getchar(Cmd, cmdp) != 0x00)
619 {
620 switch(param_getchar(Cmd, cmdp))
621 {
622 case 'h':
623 return usage_lf_simfsk();
624 case 'i':
625 invert = 1;
626 cmdp++;
627 break;
628 case 'c':
629 errors |= param_getdec(Cmd,cmdp+1,&clk);
630 cmdp+=2;
631 break;
632 case 'H':
633 errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
634 cmdp+=2;
635 break;
636 case 'L':
637 errors |= param_getdec(Cmd,cmdp+1,&fcLow);
638 cmdp+=2;
639 break;
640 //case 's':
641 // separator=1;
642 // cmdp++;
643 // break;
644 case 'd':
645 dataLen = param_getstr(Cmd, cmdp+1, hexData);
646 if (dataLen==0) {
647 errors=TRUE;
648 } else {
649 dataLen = hextobinarray((char *)data, hexData);
650 }
651 if (dataLen==0) errors=TRUE;
652 if (errors) PrintAndLog ("Error getting hex data");
653 cmdp+=2;
654 break;
655 default:
656 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
657 errors = TRUE;
658 break;
659 }
660 if(errors) break;
661 }
662 if(cmdp == 0 && DemodBufferLen == 0)
663 {
664 errors = TRUE;// No args
665 }
666
667 //Validations
668 if(errors)
669 {
670 return usage_lf_simfsk();
671 }
672
673 if (dataLen == 0){ //using DemodBuffer
674 if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
675 uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
676 if (ans==0){
677 if (!fcHigh) fcHigh=10;
678 if (!fcLow) fcLow=8;
679 if (!clk) clk=50;
680 }
681 }
682 } else {
683 setDemodBuf(data, dataLen, 0);
684 }
685 if (clk == 0) clk = 50;
686 if (fcHigh == 0) fcHigh = 10;
687 if (fcLow == 0) fcLow = 8;
688
689 uint16_t arg1, arg2;
690 arg1 = fcHigh << 8 | fcLow;
691 arg2 = invert << 8 | clk;
692 size_t size = DemodBufferLen;
693 if (size > USB_CMD_DATA_SIZE) {
694 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
695 size = USB_CMD_DATA_SIZE;
696 }
697 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
698
699 memcpy(c.d.asBytes, DemodBuffer, size);
700 SendCommand(&c);
701 return 0;
702 }
703
704 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
705 // - allow pull data from DemodBuffer
706 int CmdLFaskSim(const char *Cmd)
707 {
708 //autodetect clock from Graphbuffer if using demod buffer
709 //will need clock, invert, manchester/raw as m or r, separator as s, and bitstream
710 uint8_t encoding = 1, separator = 0;
711 //char cmdp = Cmd[0], par3='m', par4=0;
712 uint8_t clk=0, invert=0;
713 bool errors = FALSE;
714 char hexData[32] = {0x00};
715 uint8_t data[255]= {0x00}; // store entered hex data
716 int dataLen = 0;
717 uint8_t cmdp = 0;
718 while(param_getchar(Cmd, cmdp) != 0x00)
719 {
720 switch(param_getchar(Cmd, cmdp))
721 {
722 case 'h':
723 return usage_lf_simask();
724 case 'i':
725 invert = 1;
726 cmdp++;
727 break;
728 case 'c':
729 errors |= param_getdec(Cmd,cmdp+1,&clk);
730 cmdp+=2;
731 break;
732 case 'b':
733 encoding=2; //biphase
734 cmdp++;
735 break;
736 case 'm':
737 encoding=1;
738 cmdp++;
739 break;
740 case 'r':
741 encoding=0;
742 cmdp++;
743 break;
744 case 's':
745 separator=1;
746 cmdp++;
747 break;
748 case 'd':
749 dataLen = param_getstr(Cmd, cmdp+1, hexData);
750 if (dataLen==0) {
751 errors=TRUE;
752 } else {
753 dataLen = hextobinarray((char *)data, hexData);
754 }
755 if (dataLen==0) errors=TRUE;
756 if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
757 cmdp+=2;
758 break;
759 default:
760 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
761 errors = TRUE;
762 break;
763 }
764 if(errors) break;
765 }
766 if(cmdp == 0 && DemodBufferLen == 0)
767 {
768 errors = TRUE;// No args
769 }
770
771 //Validations
772 if(errors)
773 {
774 return usage_lf_simask();
775 }
776 if (dataLen == 0){ //using DemodBuffer
777 if (clk == 0) clk = GetAskClock("0", false, false);
778 } else {
779 setDemodBuf(data, dataLen, 0);
780 }
781 if (clk == 0) clk = 64;
782 if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
783 uint16_t arg1, arg2;
784 size_t size=DemodBufferLen;
785 arg1 = clk << 8 | encoding;
786 arg2 = invert << 8 | separator;
787 if (size > USB_CMD_DATA_SIZE) {
788 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
789 size = USB_CMD_DATA_SIZE;
790 }
791 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
792 PrintAndLog("preparing to sim ask data: %d bits", size);
793 memcpy(c.d.asBytes, DemodBuffer, size);
794 SendCommand(&c);
795 return 0;
796 }
797
798 // by marshmellow - sim psk data given carrier, clock, invert
799 // - allow pull data from DemodBuffer or parameters
800 int CmdLFpskSim(const char *Cmd)
801 {
802 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
803 //will need carrier, Clock, and bitstream
804 uint8_t carrier=0, clk=0;
805 uint8_t invert=0;
806 bool errors = FALSE;
807 char hexData[32] = {0x00}; // store entered hex data
808 uint8_t data[255] = {0x00};
809 int dataLen = 0;
810 uint8_t cmdp = 0;
811 uint8_t pskType = 1;
812 while(param_getchar(Cmd, cmdp) != 0x00)
813 {
814 switch(param_getchar(Cmd, cmdp))
815 {
816 case 'h':
817 return usage_lf_simpsk();
818 case 'i':
819 invert = 1;
820 cmdp++;
821 break;
822 case 'c':
823 errors |= param_getdec(Cmd,cmdp+1,&clk);
824 cmdp+=2;
825 break;
826 case 'r':
827 errors |= param_getdec(Cmd,cmdp+1,&carrier);
828 cmdp+=2;
829 break;
830 case '1':
831 pskType=1;
832 cmdp++;
833 break;
834 case '2':
835 pskType=2;
836 cmdp++;
837 break;
838 case '3':
839 pskType=3;
840 cmdp++;
841 break;
842 case 'd':
843 dataLen = param_getstr(Cmd, cmdp+1, hexData);
844 if (dataLen==0) {
845 errors=TRUE;
846 } else {
847 dataLen = hextobinarray((char *)data, hexData);
848 }
849 if (dataLen==0) errors=TRUE;
850 if (errors) PrintAndLog ("Error getting hex data");
851 cmdp+=2;
852 break;
853 default:
854 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
855 errors = TRUE;
856 break;
857 }
858 if (errors) break;
859 }
860 if (cmdp == 0 && DemodBufferLen == 0)
861 {
862 errors = TRUE;// No args
863 }
864
865 //Validations
866 if (errors)
867 {
868 return usage_lf_simpsk();
869 }
870 if (dataLen == 0){ //using DemodBuffer
871 PrintAndLog("Getting Clocks");
872 if (clk==0) clk = GetPskClock("", FALSE, FALSE);
873 PrintAndLog("clk: %d",clk);
874 if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
875 PrintAndLog("carrier: %d", carrier);
876 } else {
877 setDemodBuf(data, dataLen, 0);
878 }
879
880 if (clk <= 0) clk = 32;
881 if (carrier == 0) carrier = 2;
882 if (pskType != 1){
883 if (pskType == 2){
884 //need to convert psk2 to psk1 data before sim
885 psk2TOpsk1(DemodBuffer, DemodBufferLen);
886 } else {
887 PrintAndLog("Sorry, PSK3 not yet available");
888 }
889 }
890 uint16_t arg1, arg2;
891 arg1 = clk << 8 | carrier;
892 arg2 = invert;
893 size_t size=DemodBufferLen;
894 if (size > USB_CMD_DATA_SIZE) {
895 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
896 size=USB_CMD_DATA_SIZE;
897 }
898 UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
899 PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
900 memcpy(c.d.asBytes, DemodBuffer, size);
901 SendCommand(&c);
902
903 return 0;
904 }
905
906 int CmdLFSimBidir(const char *Cmd)
907 {
908 // Set ADC to twice the carrier for a slight supersampling
909 // HACK: not implemented in ARMSRC.
910 PrintAndLog("Not implemented yet.");
911 UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
912 SendCommand(&c);
913 return 0;
914 }
915
916 /* simulate an LF Manchester encoded tag with specified bitstream, clock rate and inter-id gap */
917 /*
918 int CmdLFSimManchester(const char *Cmd)
919 {
920 static int clock, gap;
921 static char data[1024], gapstring[8];
922
923 sscanf(Cmd, "%i %s %i", &clock, &data[0], &gap);
924
925 ClearGraph(0);
926
927 for (int i = 0; i < strlen(data) ; ++i)
928 AppendGraph(0, clock, data[i]- '0');
929
930 CmdManchesterMod("");
931
932 RepaintGraphWindow();
933
934 sprintf(&gapstring[0], "%i", gap);
935 CmdLFSim(gapstring);
936 return 0;
937 }
938 */
939
940 int CmdVchDemod(const char *Cmd)
941 {
942 // Is this the entire sync pattern, or does this also include some
943 // data bits that happen to be the same everywhere? That would be
944 // lovely to know.
945 static const int SyncPattern[] = {
946 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
947 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
948 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
949 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
950 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
951 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
952 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
953 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
954 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
955 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
956 };
957
958 // So first, we correlate for the sync pattern, and mark that.
959 int bestCorrel = 0, bestPos = 0;
960 int i;
961 // It does us no good to find the sync pattern, with fewer than
962 // 2048 samples after it...
963 for (i = 0; i < (GraphTraceLen-2048); i++) {
964 int sum = 0;
965 int j;
966 for (j = 0; j < arraylen(SyncPattern); j++) {
967 sum += GraphBuffer[i+j]*SyncPattern[j];
968 }
969 if (sum > bestCorrel) {
970 bestCorrel = sum;
971 bestPos = i;
972 }
973 }
974 PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
975
976 char bits[257];
977 bits[256] = '\0';
978
979 int worst = INT_MAX;
980 int worstPos = 0;
981
982 for (i = 0; i < 2048; i += 8) {
983 int sum = 0;
984 int j;
985 for (j = 0; j < 8; j++) {
986 sum += GraphBuffer[bestPos+i+j];
987 }
988 if (sum < 0) {
989 bits[i/8] = '.';
990 } else {
991 bits[i/8] = '1';
992 }
993 if(abs(sum) < worst) {
994 worst = abs(sum);
995 worstPos = i;
996 }
997 }
998 PrintAndLog("bits:");
999 PrintAndLog("%s", bits);
1000 PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1001
1002 if (strcmp(Cmd, "clone")==0) {
1003 GraphTraceLen = 0;
1004 char *s;
1005 for(s = bits; *s; s++) {
1006 int j;
1007 for(j = 0; j < 16; j++) {
1008 GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1009 }
1010 }
1011 RepaintGraphWindow();
1012 }
1013 return 0;
1014 }
1015
1016 //by marshmellow
1017 int CmdLFfind(const char *Cmd)
1018 {
1019 int ans=0;
1020 char cmdp = param_getchar(Cmd, 0);
1021 char testRaw = param_getchar(Cmd, 1);
1022 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1023 PrintAndLog("Usage: lf search <0|1> [u]");
1024 PrintAndLog(" <use data from Graphbuffer> , if not set, try reading data from tag.");
1025 PrintAndLog(" [Search for Unknown tags] , if not set, reads only known tags.");
1026 PrintAndLog("");
1027 PrintAndLog(" sample: lf search = try reading data from tag & search for known tags");
1028 PrintAndLog(" : lf search 1 = use data from GraphBuffer & search for known tags");
1029 PrintAndLog(" : lf search u = try reading data from tag & search for known and unknown tags");
1030 PrintAndLog(" : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1031
1032 return 0;
1033 }
1034
1035 if (!offline && (cmdp != '1')){
1036 ans=CmdLFRead("");
1037 ans=CmdSamples("20000");
1038 } else if (GraphTraceLen < 1000) {
1039 PrintAndLog("Data in Graphbuffer was too small.");
1040 return 0;
1041 }
1042 if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1043
1044 PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
1045 PrintAndLog("False Positives ARE possible\n");
1046 PrintAndLog("\nChecking for known tags:\n");
1047
1048 ans=CmdFSKdemodIO("");
1049 if (ans>0) {
1050 PrintAndLog("\nValid IO Prox ID Found!");
1051 return 1;
1052 }
1053
1054 ans=CmdFSKdemodPyramid("");
1055 if (ans>0) {
1056 PrintAndLog("\nValid Pyramid ID Found!");
1057 return 1;
1058 }
1059
1060 ans=CmdFSKdemodParadox("");
1061 if (ans>0) {
1062 PrintAndLog("\nValid Paradox ID Found!");
1063 return 1;
1064 }
1065
1066 ans=CmdFSKdemodAWID("");
1067 if (ans>0) {
1068 PrintAndLog("\nValid AWID ID Found!");
1069 return 1;
1070 }
1071
1072 ans=CmdFSKdemodHID("");
1073 if (ans>0) {
1074 PrintAndLog("\nValid HID Prox ID Found!");
1075 return 1;
1076 }
1077
1078 //add psk and indala
1079 ans=CmdIndalaDecode("");
1080 if (ans>0) {
1081 PrintAndLog("\nValid Indala ID Found!");
1082 return 1;
1083 }
1084
1085 ans=CmdAskEM410xDemod("");
1086 if (ans>0) {
1087 PrintAndLog("\nValid EM410x ID Found!");
1088 return 1;
1089 }
1090
1091 ans=CmdG_Prox_II_Demod("");
1092 if (ans>0) {
1093 PrintAndLog("\nValid G Prox II ID Found!");
1094 return 1;
1095 }
1096
1097 ans=EM4x50Read("", false);
1098 if (ans>0) {
1099 PrintAndLog("\nValid EM4x50 ID Found!");
1100 return 1;
1101 }
1102 PrintAndLog("\nNo Known Tags Found!\n");
1103 if (testRaw=='u' || testRaw=='U'){
1104 //test unknown tag formats (raw mode)
1105 PrintAndLog("\nChecking for Unknown tags:\n");
1106 ans=AutoCorrelate(4000, FALSE, FALSE);
1107 if (ans > 0) PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1108 ans=GetFskClock("",FALSE,FALSE); //CmdDetectClockRate("F"); //
1109 if (ans != 0){ //fsk
1110 ans=FSKrawDemod("",FALSE);
1111 if (ans>0) {
1112 PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1113 printDemodBuff();
1114 return 1;
1115 }
1116 }
1117 ans=ASKmanDemod("",FALSE,FALSE);
1118 if (ans>0) {
1119 PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1120 PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1121 printDemodBuff();
1122 return 1;
1123 }
1124 ans=CmdPSK1rawDemod("");
1125 if (ans>0) {
1126 PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1127 PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1128 PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1129 printDemodBuff();
1130 return 1;
1131 }
1132 PrintAndLog("\nNo Data Found!\n");
1133 }
1134 return 0;
1135 }
1136
1137 static command_t CommandTable[] =
1138 {
1139 {"help", CmdHelp, 1, "This help"},
1140 {"cmdread", CmdLFCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"},
1141 {"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
1142 {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1143 {"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
1144 {"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
1145 {"io", CmdLFIO, 1, "{ ioProx tags... }"},
1146 {"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1147 {"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1148 {"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1149 {"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"},
1150 {"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1151 {"simask", CmdLFaskSim, 0, "[clock] [invert <1|0>] [manchester/raw <'m'|'r'>] [msg separator 's'] [d <hexdata>] -- Simulate LF ASK tag from demodbuffer or input"},
1152 {"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] -- Simulate LF FSK tag from demodbuffer or input"},
1153 {"simpsk", CmdLFpskSim, 0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] -- Simulate LF PSK tag from demodbuffer or input"},
1154 {"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1155 //{"simman", CmdLFSimManchester, 0, "<Clock> <Bitstream> [GAP] Simulate arbitrary Manchester LF tag"},
1156 {"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1157 {"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
1158 {"hitag", CmdLFHitag, 1, "{ Hitag tags and transponders... }"},
1159 {"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
1160 {"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
1161 {"pcf7931", CmdLFPCF7931, 1, "{PCF7931 RFIDs...}"},
1162 {NULL, NULL, 0, NULL}
1163 };
1164
1165 int CmdLF(const char *Cmd)
1166 {
1167 CmdsParse(CommandTable, Cmd);
1168 return 0;
1169 }
1170
1171 int CmdHelp(const char *Cmd)
1172 {
1173 CmdsHelp(CommandTable);
1174 return 0;
1175 }
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