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