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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 #include "cmdlf.h"
11 static int CmdHelp(const char *Cmd);
12
13 int usage_lf_cmdread(void) {
14 PrintAndLog("Usage: lf cmdread d <delay period> z <zero period> o <one period> c <cmdbytes> [H]");
15 PrintAndLog("Options:");
16 PrintAndLog(" h This help");
17 PrintAndLog(" L Low frequency (125 KHz)");
18 PrintAndLog(" H High frequency (134 KHz)");
19 PrintAndLog(" d <delay> delay OFF period, (decimal)");
20 PrintAndLog(" z <zero> time period ZERO, (decimal)");
21 PrintAndLog(" o <one> time period ONE, (decimal)");
22 PrintAndLog(" c <cmd> Command bytes (in ones and zeros)");
23 PrintAndLog(" ************* All periods in microseconds (ms)");
24 PrintAndLog("Examples:");
25 PrintAndLog(" lf cmdread d 80 z 100 o 200 c 11000");
26 PrintAndLog(" lf cmdread d 80 z 100 o 100 c 11000 H");
27 return 0;
28 }
29 int usage_lf_read(void){
30 PrintAndLog("Usage: lf read [h] [s]");
31 PrintAndLog("Options:");
32 PrintAndLog(" h This help");
33 PrintAndLog(" s silent run no printout");
34 PrintAndLog("This function takes no arguments. ");
35 PrintAndLog("Use 'lf config' to set parameters.");
36 return 0;
37 }
38 int usage_lf_snoop(void) {
39 PrintAndLog("Usage: lf snoop");
40 PrintAndLog("Options:");
41 PrintAndLog(" h This help");
42 PrintAndLog("This function takes no arguments. ");
43 PrintAndLog("Use 'lf config' to set parameters.");
44 return 0;
45 }
46 int usage_lf_config(void) {
47 PrintAndLog("Usage: lf config [h] [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
48 PrintAndLog("Options:");
49 PrintAndLog(" h This help");
50 PrintAndLog(" L Low frequency (125 KHz)");
51 PrintAndLog(" H High frequency (134 KHz)");
52 PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
53 PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
54 PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
55 PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
56 PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
57 PrintAndLog("Examples:");
58 PrintAndLog(" lf config b 8 L");
59 PrintAndLog(" Samples at 125KHz, 8bps.");
60 PrintAndLog(" lf config H b 4 d 3");
61 PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
62 PrintAndLog(" a resolution of 4 bits per sample.");
63 PrintAndLog(" lf read");
64 PrintAndLog(" Performs a read (active field)");
65 PrintAndLog(" lf snoop");
66 PrintAndLog(" Performs a snoop (no active field)");
67 return 0;
68 }
69 int usage_lf_simfsk(void) {
70 PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
71 PrintAndLog("Options:");
72 PrintAndLog(" h This help");
73 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
74 PrintAndLog(" i invert data");
75 PrintAndLog(" H <fcHigh> Manually set the larger Field Clock");
76 PrintAndLog(" L <fcLow> Manually set the smaller Field Clock");
77 //PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
78 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
79 PrintAndLog("\n NOTE: if you set one clock manually set them all manually");
80 return 0;
81 }
82 int usage_lf_simask(void) {
83 PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
84 PrintAndLog("Options:");
85 PrintAndLog(" h This help");
86 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
87 PrintAndLog(" i invert data");
88 PrintAndLog(" b sim ask/biphase");
89 PrintAndLog(" m sim ask/manchester - Default");
90 PrintAndLog(" r sim ask/raw");
91 PrintAndLog(" s add t55xx Sequence Terminator gap - default: no gaps (only manchester)");
92 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
93 return 0;
94 }
95 int usage_lf_simpsk(void) {
96 PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
97 PrintAndLog("Options:");
98 PrintAndLog(" h This help");
99 PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
100 PrintAndLog(" i invert data");
101 PrintAndLog(" 1 set PSK1 (default)");
102 PrintAndLog(" 2 set PSK2");
103 PrintAndLog(" 3 set PSK3");
104 PrintAndLog(" r <carrier> 2|4|8 are valid carriers: default = 2");
105 PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
106 return 0;
107 }
108 int usage_lf_find(void){
109 PrintAndLog("Usage: lf search [h] <0|1> [u]");
110 PrintAndLog("");
111 PrintAndLog("Options:");
112 PrintAndLog(" h This help");
113 PrintAndLog(" <0|1> Use data from Graphbuffer, if not set, try reading data from tag.");
114 PrintAndLog(" u Search for Unknown tags, if not set, reads only known tags.");
115 PrintAndLog("Examples:");
116 PrintAndLog(" lf search = try reading data from tag & search for known tags");
117 PrintAndLog(" lf search 1 = use data from GraphBuffer & search for known tags");
118 PrintAndLog(" lf search u = try reading data from tag & search for known and unknown tags");
119 PrintAndLog(" lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
120 return 0;
121 }
122
123
124 /* send a LF command before reading */
125 int CmdLFCommandRead(const char *Cmd) {
126 // static char dummy[3] = {0x20,0x00,0x00};
127 bool errors = FALSE;
128 bool useHighFreq = FALSE;
129 uint16_t one = 0, zero = 0;
130 uint8_t cmdp = 0;
131 int strLength = 0;
132 UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K, {0,0,0}};
133
134 while(param_getchar(Cmd, cmdp) != 0x00) {
135 switch(param_getchar(Cmd, cmdp)) {
136 case 'h':
137 return usage_lf_cmdread();
138 case 'H':
139 //dummy[1]='h';
140 useHighFreq = TRUE;
141 cmdp++;
142 break;
143 case 'L':
144 cmdp++;
145 break;
146 case 'c':
147 strLength = param_getstr(Cmd, cmdp+1, (char *)&c.d.asBytes);
148 cmdp+=2;
149 break;
150 case 'd':
151 c.arg[0] = param_get32ex(Cmd, cmdp+1, 0, 10);
152 cmdp+=2;
153 break;
154 case 'z':
155 zero = param_get32ex(Cmd, cmdp+1, 0, 10) & 0xFFFF;
156 cmdp+=2;
157 break;
158 case 'o':
159 one = param_get32ex(Cmd, cmdp+1, 0, 10) & 0xFFFF;
160 cmdp+=2;
161 break;
162 default:
163 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
164 errors = 1;
165 break;
166 }
167 if(errors) break;
168 }
169 // No args
170 if (cmdp == 0) errors = TRUE;
171
172 //Validations
173 if (errors) return usage_lf_cmdread();
174
175 // zero and one lengths
176 c.arg[1] = zero << 16 | one;
177
178 // add frequency 125 or 134
179 c.arg[2] = useHighFreq;
180
181 clearCommandBuffer();
182 SendCommand(&c);
183 return 0;
184 }
185
186 int CmdFlexdemod(const char *Cmd)
187 {
188 int i;
189 for (i = 0; i < GraphTraceLen; ++i) {
190 if (GraphBuffer[i] < 0) {
191 GraphBuffer[i] = -1;
192 } else {
193 GraphBuffer[i] = 1;
194 }
195 }
196
197 #define LONG_WAIT 100
198 int start;
199 for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
200 int first = GraphBuffer[start];
201 for (i = start; i < start + LONG_WAIT; i++) {
202 if (GraphBuffer[i] != first) {
203 break;
204 }
205 }
206 if (i == (start + LONG_WAIT)) {
207 break;
208 }
209 }
210 if (start == GraphTraceLen - LONG_WAIT) {
211 PrintAndLog("nothing to wait for");
212 return 0;
213 }
214
215 GraphBuffer[start] = 2;
216 GraphBuffer[start+1] = -2;
217 uint8_t bits[64] = {0x00};
218
219 int bit, sum;
220 i = start;
221 for (bit = 0; bit < 64; bit++) {
222 sum = 0;
223 for (int j = 0; j < 16; j++) {
224 sum += GraphBuffer[i++];
225 }
226
227 bits[bit] = (sum > 0) ? 1 : 0;
228
229 PrintAndLog("bit %d sum %d", bit, sum);
230 }
231
232 for (bit = 0; bit < 64; bit++) {
233 int j;
234 int sum = 0;
235 for (j = 0; j < 16; j++) {
236 sum += GraphBuffer[i++];
237 }
238 if (sum > 0 && bits[bit] != 1) {
239 PrintAndLog("oops1 at %d", bit);
240 }
241 if (sum < 0 && bits[bit] != 0) {
242 PrintAndLog("oops2 at %d", bit);
243 }
244 }
245
246 // HACK writing back to graphbuffer.
247 GraphTraceLen = 32*64;
248 i = 0;
249 int phase = 0;
250 for (bit = 0; bit < 64; bit++) {
251
252 phase = (bits[bit] == 0) ? 0 : 1;
253
254 int j;
255 for (j = 0; j < 32; j++) {
256 GraphBuffer[i++] = phase;
257 phase = !phase;
258 }
259 }
260
261 RepaintGraphWindow();
262 return 0;
263 }
264
265 int CmdIndalaDemod(const char *Cmd)
266 {
267 // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
268
269 int state = -1;
270 int count = 0;
271 int i, j;
272
273 // worst case with GraphTraceLen=64000 is < 4096
274 // under normal conditions it's < 2048
275
276 uint8_t rawbits[4096];
277 int rawbit = 0;
278 int worst = 0, worstPos = 0;
279 // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
280
281 // loop through raw signal - since we know it is psk1 rf/32 fc/2 skip every other value (+=2)
282 for (i = 0; i < GraphTraceLen-1; i += 2) {
283 count += 1;
284 if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
285 // appears redundant - marshmellow
286 if (state == 0) {
287 for (j = 0; j < count - 8; j += 16) {
288 rawbits[rawbit++] = 0;
289 }
290 if ((abs(count - j)) > worst) {
291 worst = abs(count - j);
292 worstPos = i;
293 }
294 }
295 state = 1;
296 count = 0;
297 } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
298 //appears redundant
299 if (state == 1) {
300 for (j = 0; j < count - 8; j += 16) {
301 rawbits[rawbit++] = 1;
302 }
303 if ((abs(count - j)) > worst) {
304 worst = abs(count - j);
305 worstPos = i;
306 }
307 }
308 state = 0;
309 count = 0;
310 }
311 }
312
313 if ( rawbit>0 ){
314 PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
315 PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
316 } else {
317 return 0;
318 }
319
320 // Finding the start of a UID
321 int uidlen, long_wait;
322 if (strcmp(Cmd, "224") == 0) {
323 uidlen = 224;
324 long_wait = 30;
325 } else {
326 uidlen = 64;
327 long_wait = 29;
328 }
329
330 int start;
331 int first = 0;
332 for (start = 0; start <= rawbit - uidlen; start++) {
333 first = rawbits[start];
334 for (i = start; i < start + long_wait; i++) {
335 if (rawbits[i] != first) {
336 break;
337 }
338 }
339 if (i == (start + long_wait)) {
340 break;
341 }
342 }
343
344 if (start == rawbit - uidlen + 1) {
345 PrintAndLog("nothing to wait for");
346 return 0;
347 }
348
349 // Inverting signal if needed
350 if (first == 1) {
351 for (i = start; i < rawbit; i++) {
352 rawbits[i] = !rawbits[i];
353 }
354 }
355
356 // Dumping UID
357 uint8_t bits[224] = {0x00};
358 char showbits[225] = {0x00};
359 int bit;
360 i = start;
361 int times = 0;
362
363 if (uidlen > rawbit) {
364 PrintAndLog("Warning: not enough raw bits to get a full UID");
365 for (bit = 0; bit < rawbit; bit++) {
366 bits[bit] = rawbits[i++];
367 // As we cannot know the parity, let's use "." and "/"
368 showbits[bit] = '.' + bits[bit];
369 }
370 showbits[bit+1]='\0';
371 PrintAndLog("Partial UID=%s", showbits);
372 return 0;
373 } else {
374 for (bit = 0; bit < uidlen; bit++) {
375 bits[bit] = rawbits[i++];
376 showbits[bit] = '0' + bits[bit];
377 }
378 times = 1;
379 }
380
381 //convert UID to HEX
382 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
383 int idx;
384 uid1 = uid2 = 0;
385
386 if (uidlen==64){
387 for( idx=0; idx<64; idx++) {
388 if (showbits[idx] == '0') {
389 uid1 = (uid1<<1) | (uid2>>31);
390 uid2 = (uid2<<1) | 0;
391 } else {
392 uid1 = (uid1<<1) | (uid2>>31);
393 uid2 = (uid2<<1) | 1;
394 }
395 }
396 PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
397 } else {
398 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
399
400 for( idx=0; idx<224; idx++) {
401 uid1 = (uid1<<1) | (uid2>>31);
402 uid2 = (uid2<<1) | (uid3>>31);
403 uid3 = (uid3<<1) | (uid4>>31);
404 uid4 = (uid4<<1) | (uid5>>31);
405 uid5 = (uid5<<1) | (uid6>>31);
406 uid6 = (uid6<<1) | (uid7>>31);
407
408 if (showbits[idx] == '0')
409 uid7 = (uid7<<1) | 0;
410 else
411 uid7 = (uid7<<1) | 1;
412 }
413 PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
414 }
415
416 // Checking UID against next occurrences
417 int failed = 0;
418 for (; i + uidlen <= rawbit;) {
419 failed = 0;
420 for (bit = 0; bit < uidlen; bit++) {
421 if (bits[bit] != rawbits[i++]) {
422 failed = 1;
423 break;
424 }
425 }
426 if (failed == 1) {
427 break;
428 }
429 times += 1;
430 }
431
432 PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
433
434 // Remodulating for tag cloning
435 // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
436 // since this changes graphbuffer data.
437 GraphTraceLen = 32 * uidlen;
438 i = 0;
439 int phase = 0;
440 for (bit = 0; bit < uidlen; bit++) {
441 phase = (bits[bit] == 0) ? 0 : 1;
442 int j;
443 for (j = 0; j < 32; j++) {
444 GraphBuffer[i++] = phase;
445 phase = !phase;
446 }
447 }
448
449 RepaintGraphWindow();
450 return 1;
451 }
452
453 int CmdIndalaClone(const char *Cmd)
454 {
455 UsbCommand c;
456 unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
457
458 uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
459 int n = 0, i = 0;
460
461 if (strchr(Cmd,'l') != 0) {
462 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
463 uid1 = (uid1 << 4) | (uid2 >> 28);
464 uid2 = (uid2 << 4) | (uid3 >> 28);
465 uid3 = (uid3 << 4) | (uid4 >> 28);
466 uid4 = (uid4 << 4) | (uid5 >> 28);
467 uid5 = (uid5 << 4) | (uid6 >> 28);
468 uid6 = (uid6 << 4) | (uid7 >> 28);
469 uid7 = (uid7 << 4) | (n & 0xf);
470 }
471 PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
472 c.cmd = CMD_INDALA_CLONE_TAG_L;
473 c.d.asDwords[0] = uid1;
474 c.d.asDwords[1] = uid2;
475 c.d.asDwords[2] = uid3;
476 c.d.asDwords[3] = uid4;
477 c.d.asDwords[4] = uid5;
478 c.d.asDwords[5] = uid6;
479 c.d.asDwords[6] = uid7;
480 } else {
481 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
482 uid1 = (uid1 << 4) | (uid2 >> 28);
483 uid2 = (uid2 << 4) | (n & 0xf);
484 }
485 PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
486 c.cmd = CMD_INDALA_CLONE_TAG;
487 c.arg[0] = uid1;
488 c.arg[1] = uid2;
489 }
490
491 clearCommandBuffer();
492 SendCommand(&c);
493 return 0;
494 }
495
496 int CmdLFSetConfig(const char *Cmd)
497 {
498 uint8_t divisor = 0;//Frequency divisor
499 uint8_t bps = 0; // Bits per sample
500 uint8_t decimation = 0; //How many to keep
501 bool averaging = 1; // Defaults to true
502 bool errors = FALSE;
503 int trigger_threshold = -1;//Means no change
504 uint8_t unsigned_trigg = 0;
505
506 uint8_t cmdp = 0;
507 while(param_getchar(Cmd, cmdp) != 0x00)
508 {
509 switch(param_getchar(Cmd, cmdp))
510 {
511 case 'h':
512 return usage_lf_config();
513 case 'H':
514 divisor = 88;
515 cmdp++;
516 break;
517 case 'L':
518 divisor = 95;
519 cmdp++;
520 break;
521 case 'q':
522 errors |= param_getdec(Cmd,cmdp+1,&divisor);
523 cmdp+=2;
524 break;
525 case 't':
526 errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
527 cmdp+=2;
528 if(!errors) trigger_threshold = unsigned_trigg;
529 break;
530 case 'b':
531 errors |= param_getdec(Cmd,cmdp+1,&bps);
532 cmdp+=2;
533 break;
534 case 'd':
535 errors |= param_getdec(Cmd,cmdp+1,&decimation);
536 cmdp+=2;
537 break;
538 case 'a':
539 averaging = param_getchar(Cmd,cmdp+1) == '1';
540 cmdp+=2;
541 break;
542 default:
543 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
544 errors = 1;
545 break;
546 }
547 if(errors) break;
548 }
549
550 // No args
551 if (cmdp == 0) errors = 1;
552
553 //Validations
554 if (errors) return usage_lf_config();
555
556 //Bps is limited to 8, so fits in lower half of arg1
557 if (bps >> 4) bps = 8;
558
559 sample_config config = { decimation, bps, averaging, divisor, trigger_threshold };
560
561 //Averaging is a flag on high-bit of arg[1]
562 UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
563 memcpy(c.d.asBytes,&config,sizeof(sample_config));
564 clearCommandBuffer();
565 SendCommand(&c);
566 return 0;
567 }
568
569 int CmdLFRead(const char *Cmd)
570 {
571 bool arg1 = false;
572 uint8_t cmdp = param_getchar(Cmd, 0);
573
574 if ( cmdp == 'h' || cmdp == 'H') return usage_lf_read();
575
576 //suppress print
577 if ( cmdp == 's' || cmdp == 'S') arg1 = true;
578
579 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
580 clearCommandBuffer();
581 SendCommand(&c);
582 if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
583 PrintAndLog("command execution time out");
584 return 1;
585 }
586 return 0;
587 }
588
589 int CmdLFSnoop(const char *Cmd)
590 {
591 uint8_t cmdp = param_getchar(Cmd, 0);
592 if(cmdp == 'h' || cmdp == 'H') return usage_lf_snoop();
593
594 UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
595 clearCommandBuffer();
596 SendCommand(&c);
597 WaitForResponse(CMD_ACK,NULL);
598 return 0;
599 }
600
601 static void ChkBitstream(const char *str)
602 {
603 int i;
604
605 /* convert to bitstream if necessary */
606 for (i = 0; i < (int)(GraphTraceLen / 2); i++){
607 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
608 CmdGetBitStream("");
609 break;
610 }
611 }
612 }
613 //Attempt to simulate any wave in buffer (one bit per output sample)
614 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
615 int CmdLFSim(const char *Cmd)
616 {
617 int i,j;
618 static int gap;
619
620 sscanf(Cmd, "%i", &gap);
621
622 // convert to bitstream if necessary
623 ChkBitstream(Cmd);
624
625 //can send only 512 bits at a time (1 byte sent per bit...)
626 printf("Sending [%d bytes]", GraphTraceLen);
627 for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
628 UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
629
630 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
631 c.d.asBytes[j] = GraphBuffer[i+j];
632 }
633 clearCommandBuffer();
634 SendCommand(&c);
635 WaitForResponse(CMD_ACK,NULL);
636 printf(".");
637 }
638
639 PrintAndLog("\nStarting to simulate");
640 UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
641 clearCommandBuffer();
642 SendCommand(&c);
643 return 0;
644 }
645
646 // by marshmellow - sim fsk data given clock, fcHigh, fcLow, invert
647 // - allow pull data from DemodBuffer
648 int CmdLFfskSim(const char *Cmd)
649 {
650 //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
651 // otherwise will need FChigh, FClow, Clock, and bitstream
652 uint8_t fcHigh = 0, fcLow = 0, clk = 0;
653 uint8_t invert = 0;
654 bool errors = FALSE;
655 char hexData[32] = {0x00}; // store entered hex data
656 uint8_t data[255] = {0x00};
657 int dataLen = 0;
658 uint8_t cmdp = 0;
659
660 while(param_getchar(Cmd, cmdp) != 0x00)
661 {
662 switch(param_getchar(Cmd, cmdp))
663 {
664 case 'h':
665 return usage_lf_simfsk();
666 case 'i':
667 invert = 1;
668 cmdp++;
669 break;
670 case 'c':
671 errors |= param_getdec(Cmd, cmdp+1, &clk);
672 cmdp += 2;
673 break;
674 case 'H':
675 errors |= param_getdec(Cmd, cmdp+1, &fcHigh);
676 cmdp += 2;
677 break;
678 case 'L':
679 errors |= param_getdec(Cmd, cmdp+1, &fcLow);
680 cmdp += 2;
681 break;
682 //case 's':
683 // separator = 1;
684 // cmdp++;
685 // break;
686 case 'd':
687 dataLen = param_getstr(Cmd, cmdp+1, hexData);
688 if (dataLen == 0)
689 errors = TRUE;
690 else
691 dataLen = hextobinarray((char *)data, hexData);
692
693 if (dataLen == 0) errors = TRUE;
694 if (errors) PrintAndLog ("Error getting hex data");
695 cmdp+=2;
696 break;
697 default:
698 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
699 errors = TRUE;
700 break;
701 }
702 if(errors) break;
703 }
704
705 // No args
706 if(cmdp == 0 && DemodBufferLen == 0)
707 errors = TRUE;
708
709 //Validations
710 if(errors) return usage_lf_simfsk();
711
712 if (dataLen == 0){ //using DemodBuffer
713 if (clk == 0 || fcHigh == 0 || fcLow == 0){ //manual settings must set them all
714 uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
715 if (ans==0){
716 if (!fcHigh) fcHigh = 10;
717 if (!fcLow) fcLow = 8;
718 if (!clk) clk = 50;
719 }
720 }
721 } else {
722 setDemodBuf(data, dataLen, 0);
723 }
724
725 //default if not found
726 if (clk == 0) clk = 50;
727 if (fcHigh == 0) fcHigh = 10;
728 if (fcLow == 0) fcLow = 8;
729
730 uint16_t arg1, arg2;
731 arg1 = fcHigh << 8 | fcLow;
732 arg2 = invert << 8 | clk;
733 size_t size = DemodBufferLen;
734 if (size > USB_CMD_DATA_SIZE) {
735 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
736 size = USB_CMD_DATA_SIZE;
737 }
738 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
739
740 memcpy(c.d.asBytes, DemodBuffer, size);
741 clearCommandBuffer();
742 SendCommand(&c);
743 return 0;
744 }
745
746 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
747 // - allow pull data from DemodBuffer
748 int CmdLFaskSim(const char *Cmd)
749 {
750 // autodetect clock from Graphbuffer if using demod buffer
751 // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
752 uint8_t encoding = 1, separator = 0, clk = 0, invert = 0;
753 bool errors = FALSE;
754 char hexData[32] = {0x00};
755 uint8_t data[255]= {0x00}; // store entered hex data
756 int dataLen = 0;
757 uint8_t cmdp = 0;
758
759 while(param_getchar(Cmd, cmdp) != 0x00) {
760 switch(param_getchar(Cmd, cmdp)) {
761 case 'h': return usage_lf_simask();
762 case 'i':
763 invert = 1;
764 cmdp++;
765 break;
766 case 'c':
767 errors |= param_getdec(Cmd, cmdp+1, &clk);
768 cmdp += 2;
769 break;
770 case 'b':
771 encoding = 2; //biphase
772 cmdp++;
773 break;
774 case 'm':
775 encoding = 1; //manchester
776 cmdp++;
777 break;
778 case 'r':
779 encoding = 0; //raw
780 cmdp++;
781 break;
782 case 's':
783 separator = 1;
784 cmdp++;
785 break;
786 case 'd':
787 dataLen = param_getstr(Cmd, cmdp+1, hexData);
788 if (dataLen == 0)
789 errors = TRUE;
790 else
791 dataLen = hextobinarray((char *)data, hexData);
792
793 if (dataLen == 0) errors = TRUE;
794 if (errors) PrintAndLog ("Error getting hex data, datalen: %d", dataLen);
795 cmdp += 2;
796 break;
797 default:
798 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
799 errors = TRUE;
800 break;
801 }
802 if(errors) break;
803 }
804
805 // No args
806 if(cmdp == 0 && DemodBufferLen == 0)
807 errors = TRUE;
808
809 //Validations
810 if(errors) return usage_lf_simask();
811
812 if (dataLen == 0){ //using DemodBuffer
813 if (clk == 0)
814 clk = GetAskClock("0", false, false);
815 } else {
816 setDemodBuf(data, dataLen, 0);
817 }
818 if (clk == 0) clk = 64;
819 if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
820
821 size_t size = DemodBufferLen;
822
823 if (size > USB_CMD_DATA_SIZE) {
824 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
825 size = USB_CMD_DATA_SIZE;
826 }
827
828 PrintAndLog("preparing to sim ask data: %d bits", size);
829
830 uint16_t arg1, arg2;
831 arg1 = clk << 8 | encoding;
832 arg2 = invert << 8 | separator;
833
834 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
835 memcpy(c.d.asBytes, DemodBuffer, size);
836 clearCommandBuffer();
837 SendCommand(&c);
838 return 0;
839 }
840
841 // by marshmellow - sim psk data given carrier, clock, invert
842 // - allow pull data from DemodBuffer or parameters
843 int CmdLFpskSim(const char *Cmd)
844 {
845 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
846 //will need carrier, Clock, and bitstream
847 uint8_t carrier=0, clk=0;
848 uint8_t invert=0;
849 bool errors = FALSE;
850 char hexData[32] = {0x00}; // store entered hex data
851 uint8_t data[255] = {0x00};
852 int dataLen = 0;
853 uint8_t cmdp = 0;
854 uint8_t pskType = 1;
855 while(param_getchar(Cmd, cmdp) != 0x00)
856 {
857 switch(param_getchar(Cmd, cmdp))
858 {
859 case 'h':
860 return usage_lf_simpsk();
861 case 'i':
862 invert = 1;
863 cmdp++;
864 break;
865 case 'c':
866 errors |= param_getdec(Cmd,cmdp+1,&clk);
867 cmdp+=2;
868 break;
869 case 'r':
870 errors |= param_getdec(Cmd,cmdp+1,&carrier);
871 cmdp+=2;
872 break;
873 case '1':
874 pskType=1;
875 cmdp++;
876 break;
877 case '2':
878 pskType=2;
879 cmdp++;
880 break;
881 case '3':
882 pskType=3;
883 cmdp++;
884 break;
885 case 'd':
886 dataLen = param_getstr(Cmd, cmdp+1, hexData);
887 if (dataLen==0) {
888 errors=TRUE;
889 } else {
890 dataLen = hextobinarray((char *)data, hexData);
891 }
892 if (dataLen==0) errors=TRUE;
893 if (errors) PrintAndLog ("Error getting hex data");
894 cmdp+=2;
895 break;
896 default:
897 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
898 errors = TRUE;
899 break;
900 }
901 if (errors) break;
902 }
903 if (cmdp == 0 && DemodBufferLen == 0)
904 {
905 errors = TRUE;// No args
906 }
907
908 //Validations
909 if (errors)
910 {
911 return usage_lf_simpsk();
912 }
913 if (dataLen == 0){ //using DemodBuffer
914 PrintAndLog("Getting Clocks");
915 if (clk==0) clk = GetPskClock("", FALSE, FALSE);
916 PrintAndLog("clk: %d",clk);
917 if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
918 PrintAndLog("carrier: %d", carrier);
919 } else {
920 setDemodBuf(data, dataLen, 0);
921 }
922
923 if (clk <= 0) clk = 32;
924 if (carrier == 0) carrier = 2;
925 if (pskType != 1){
926 if (pskType == 2){
927 //need to convert psk2 to psk1 data before sim
928 psk2TOpsk1(DemodBuffer, DemodBufferLen);
929 } else {
930 PrintAndLog("Sorry, PSK3 not yet available");
931 }
932 }
933 uint16_t arg1, arg2;
934 arg1 = clk << 8 | carrier;
935 arg2 = invert;
936 size_t size=DemodBufferLen;
937 if (size > USB_CMD_DATA_SIZE) {
938 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
939 size=USB_CMD_DATA_SIZE;
940 }
941 UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
942 PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
943 memcpy(c.d.asBytes, DemodBuffer, size);
944 clearCommandBuffer();
945 SendCommand(&c);
946
947 return 0;
948 }
949
950 int CmdLFSimBidir(const char *Cmd)
951 {
952 // Set ADC to twice the carrier for a slight supersampling
953 // HACK: not implemented in ARMSRC.
954 PrintAndLog("Not implemented yet.");
955 UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
956 SendCommand(&c);
957 return 0;
958 }
959
960 int CmdVchDemod(const char *Cmd)
961 {
962 // Is this the entire sync pattern, or does this also include some
963 // data bits that happen to be the same everywhere? That would be
964 // lovely to know.
965 static const int SyncPattern[] = {
966 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
967 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
968 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
969 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
970 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
971 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
972 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
973 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
974 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
975 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
976 };
977
978 // So first, we correlate for the sync pattern, and mark that.
979 int bestCorrel = 0, bestPos = 0;
980 int i;
981 // It does us no good to find the sync pattern, with fewer than
982 // 2048 samples after it...
983 for (i = 0; i < (GraphTraceLen-2048); i++) {
984 int sum = 0;
985 int j;
986 for (j = 0; j < arraylen(SyncPattern); j++) {
987 sum += GraphBuffer[i+j]*SyncPattern[j];
988 }
989 if (sum > bestCorrel) {
990 bestCorrel = sum;
991 bestPos = i;
992 }
993 }
994 PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
995
996 char bits[257];
997 bits[256] = '\0';
998
999 int worst = INT_MAX;
1000 int worstPos = 0;
1001
1002 for (i = 0; i < 2048; i += 8) {
1003 int sum = 0;
1004 int j;
1005 for (j = 0; j < 8; j++) {
1006 sum += GraphBuffer[bestPos+i+j];
1007 }
1008 if (sum < 0) {
1009 bits[i/8] = '.';
1010 } else {
1011 bits[i/8] = '1';
1012 }
1013 if(abs(sum) < worst) {
1014 worst = abs(sum);
1015 worstPos = i;
1016 }
1017 }
1018 PrintAndLog("bits:");
1019 PrintAndLog("%s", bits);
1020 PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1021
1022 if (strcmp(Cmd, "clone")==0) {
1023 GraphTraceLen = 0;
1024 char *s;
1025 for(s = bits; *s; s++) {
1026 int j;
1027 for(j = 0; j < 16; j++) {
1028 GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1029 }
1030 }
1031 RepaintGraphWindow();
1032 }
1033 return 0;
1034 }
1035
1036 //by marshmellow
1037 int CmdLFfind(const char *Cmd) {
1038 int ans = 0;
1039 char cmdp = param_getchar(Cmd, 0);
1040 char testRaw = param_getchar(Cmd, 1);
1041 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') return usage_lf_find();
1042
1043 if (!offline && (cmdp != '1')){
1044 CmdLFRead("s");
1045 getSamples("30000",false);
1046 } else if (GraphTraceLen < 1000) {
1047 PrintAndLog("Data in Graphbuffer was too small.");
1048 return 0;
1049 }
1050 if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1051
1052 PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
1053 PrintAndLog("False Positives ARE possible\n");
1054 PrintAndLog("\nChecking for known tags:\n");
1055
1056 ans=CmdFSKdemodIO("");
1057 if (ans>0) {
1058 PrintAndLog("\nValid IO Prox ID Found!");
1059 return 1;
1060 }
1061 ans=CmdFSKdemodPyramid("");
1062 if (ans>0) {
1063 PrintAndLog("\nValid Pyramid ID Found!");
1064 return 1;
1065 }
1066 ans=CmdFSKdemodParadox("");
1067 if (ans>0) {
1068 PrintAndLog("\nValid Paradox ID Found!");
1069 return 1;
1070 }
1071 ans=CmdFSKdemodAWID("");
1072 if (ans>0) {
1073 PrintAndLog("\nValid AWID ID Found!");
1074 return 1;
1075 }
1076 ans=CmdFSKdemodHID("");
1077 if (ans>0) {
1078 PrintAndLog("\nValid HID Prox ID Found!");
1079 return 1;
1080 }
1081 ans=CmdAskEM410xDemod("");
1082 if (ans>0) {
1083 PrintAndLog("\nValid EM410x ID Found!");
1084 return 1;
1085 }
1086 ans=CmdG_Prox_II_Demod("");
1087 if (ans>0) {
1088 PrintAndLog("\nValid Guardall G-Prox II ID Found!");
1089 return 1;
1090 }
1091 ans=CmdFDXBdemodBI("");
1092 if (ans>0) {
1093 PrintAndLog("\nValid FDX-B ID Found!");
1094 return 1;
1095 }
1096 ans=EM4x50Read("", false);
1097 if (ans>0) {
1098 PrintAndLog("\nValid EM4x50 ID Found!");
1099 return 1;
1100 }
1101 ans=CmdVikingDemod("");
1102 if (ans>0) {
1103 PrintAndLog("\nValid Viking ID Found!");
1104 return 1;
1105 }
1106 ans=CmdIndalaDecode("");
1107 if (ans>0) {
1108 PrintAndLog("\nValid Indala ID Found!");
1109 return 1;
1110 }
1111 ans=CmdPSKNexWatch("");
1112 if (ans>0) {
1113 PrintAndLog("\nValid NexWatch ID Found!");
1114 return 1;
1115 }
1116 ans=CmdJablotronDemod("");
1117 if (ans>0) {
1118 PrintAndLog("\nValid Jablotron ID Found!");
1119 return 1;
1120 }
1121 ans=CmdLFNedapDemod("");
1122 if (ans>0) {
1123 PrintAndLog("\nValid NEDAP ID Found!");
1124 return 1;
1125 }
1126 // TIdemod?
1127
1128
1129 PrintAndLog("\nNo Known Tags Found!\n");
1130 if (testRaw=='u' || testRaw=='U'){
1131 //test unknown tag formats (raw mode)
1132 PrintAndLog("\nChecking for Unknown tags:\n");
1133 ans=AutoCorrelate(4000, FALSE, FALSE);
1134
1135 if (ans > 0) {
1136
1137 PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1138
1139 if ( ans % 8 == 0) {
1140 int bytes = (ans / 8);
1141 PrintAndLog("Possible %d bytes", bytes);
1142 int blocks = 0;
1143 if ( bytes % 2 == 0) {
1144 blocks = (bytes / 2);
1145 PrintAndLog("Possible 2 blocks, width %d", blocks);
1146 }
1147 if ( bytes % 4 == 0) {
1148 blocks = (bytes / 4);
1149 PrintAndLog("Possible 4 blocks, width %d", blocks);
1150 }
1151 if ( bytes % 8 == 0) {
1152 blocks = (bytes / 8);
1153 PrintAndLog("Possible 8 blocks, width %d", blocks);
1154 }
1155 if ( bytes % 16 == 0) {
1156 blocks = (bytes / 16);
1157 PrintAndLog("Possible 16 blocks, width %d", blocks);
1158 }
1159 }
1160 }
1161
1162 ans=GetFskClock("",FALSE,FALSE);
1163 if (ans != 0){ //fsk
1164 ans=FSKrawDemod("",TRUE);
1165 if (ans>0) {
1166 PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1167 return 1;
1168 }
1169 }
1170 bool st = TRUE;
1171 ans=ASKDemod_ext("0 0 0",TRUE,FALSE,1,&st);
1172 if (ans>0) {
1173 PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1174 PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1175 return 1;
1176 }
1177
1178 ans=CmdPSK1rawDemod("");
1179 if (ans>0) {
1180 PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1181 PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1182 PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1183 return 1;
1184 }
1185 PrintAndLog("\nNo Data Found!\n");
1186 }
1187 return 0;
1188 }
1189
1190 static command_t CommandTable[] =
1191 {
1192 {"help", CmdHelp, 1, "This help"},
1193 {"awid", CmdLFAWID, 1, "{ AWID RFIDs... }"},
1194 {"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
1195 {"guard", CmdLFGuard, 1, "{ Guardall RFIDs... }"},
1196 {"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
1197 {"hitag", CmdLFHitag, 1, "{ HITAG RFIDs... }"},
1198 {"io", CmdLFIO, 1, "{ IOPROX RFIDs... }"},
1199 {"jablotron", CmdLFJablotron, 1, "{ JABLOTRON RFIDs... }"},
1200 {"nedap", CmdLFNedap, 1, "{ NEDAP RFIDs... }"},
1201 {"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
1202 {"presco", CmdLFPresco, 1, "{ Presco RFIDs... }"},
1203 {"pyramid", CmdLFPyramid, 1, "{ Farpointe/Pyramid RFIDs... }"},
1204 {"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
1205 {"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
1206 {"viking", CmdLFViking, 1, "{ Viking RFIDs... }"},
1207 {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1208 {"cmdread", CmdLFCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h' 134] \n\t\t-- Modulate LF reader field to send command before read (all periods in microseconds)"},
1209 {"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
1210 {"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1211 {"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1212 {"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1213 {"search", CmdLFfind, 1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) \n\t\t-- 'u' to search for unknown tags"},
1214 {"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1215 {"simask", CmdLFaskSim, 0, "[clock] [invert <1|0>] [biphase/manchester/raw <'b'|'m'|'r'>] [msg separator 's'] [d <hexdata>] \n\t\t-- Simulate LF ASK tag from demodbuffer or input"},
1216 {"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
1217 {"simpsk", CmdLFpskSim, 0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] \n\t\t-- Simulate LF PSK tag from demodbuffer or input"},
1218 {"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1219 {"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1220 {"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
1221 {NULL, NULL, 0, NULL}
1222 };
1223
1224 int CmdLF(const char *Cmd) {
1225 clearCommandBuffer();
1226 CmdsParse(CommandTable, Cmd);
1227 return 0;
1228 }
1229
1230 int CmdHelp(const char *Cmd) {
1231 CmdsHelp(CommandTable);
1232 return 0;
1233 }
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