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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
127 bool errors = FALSE;
128 bool useHighFreq = FALSE;
129 uint16_t one = 0, zero = 0;
130 uint8_t cmdp = 0;
131 UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K, {0,0,0}};
132
133 while(param_getchar(Cmd, cmdp) != 0x00) {
134 switch(param_getchar(Cmd, cmdp)) {
135 case 'h':
136 return usage_lf_cmdread();
137 case 'H':
138 useHighFreq = TRUE;
139 cmdp++;
140 break;
141 case 'L':
142 cmdp++;
143 break;
144 case 'c':
145 param_getstr(Cmd, cmdp+1, (char *)&c.d.asBytes);
146 cmdp+=2;
147 break;
148 case 'd':
149 c.arg[0] = param_get32ex(Cmd, cmdp+1, 0, 10);
150 cmdp+=2;
151 break;
152 case 'z':
153 zero = param_get32ex(Cmd, cmdp+1, 0, 10) & 0xFFFF;
154 cmdp+=2;
155 break;
156 case 'o':
157 one = param_get32ex(Cmd, cmdp+1, 0, 10) & 0xFFFF;
158 cmdp+=2;
159 break;
160 default:
161 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
162 errors = 1;
163 break;
164 }
165 if(errors) break;
166 }
167 // No args
168 if (cmdp == 0) errors = TRUE;
169
170 //Validations
171 if (errors) return usage_lf_cmdread();
172
173 // zero and one lengths
174 c.arg[1] = (uint32_t)(zero << 16 | one);
175
176 // add frequency 125 or 134
177 c.arg[2] = useHighFreq;
178
179 clearCommandBuffer();
180 SendCommand(&c);
181 return 0;
182 }
183
184 int CmdFlexdemod(const char *Cmd)
185 {
186 #define LONG_WAIT 100
187 int i, j, start, bit, sum;
188 int phase = 0;
189
190 for (i = 0; i < GraphTraceLen; ++i)
191 GraphBuffer[i] = (GraphBuffer[i] < 0) ? -1 : 1;
192
193 for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
194 int first = GraphBuffer[start];
195 for (i = start; i < start + LONG_WAIT; i++) {
196 if (GraphBuffer[i] != first) {
197 break;
198 }
199 }
200 if (i == (start + LONG_WAIT))
201 break;
202 }
203
204 if (start == GraphTraceLen - LONG_WAIT) {
205 PrintAndLog("nothing to wait for");
206 return 0;
207 }
208
209 GraphBuffer[start] = 2;
210 GraphBuffer[start+1] = -2;
211 uint8_t bits[64] = {0x00};
212
213 i = start;
214 for (bit = 0; bit < 64; bit++) {
215 sum = 0;
216 for (int j = 0; j < 16; j++) {
217 sum += GraphBuffer[i++];
218 }
219 bits[bit] = (sum > 0) ? 1 : 0;
220 PrintAndLog("bit %d sum %d", bit, sum);
221 }
222
223 for (bit = 0; bit < 64; bit++) {
224 sum = 0;
225 for (j = 0; j < 16; j++)
226 sum += GraphBuffer[i++];
227
228 if (sum > 0 && bits[bit] != 1) PrintAndLog("oops1 at %d", bit);
229
230 if (sum < 0 && bits[bit] != 0) PrintAndLog("oops2 at %d", bit);
231
232 }
233
234 // HACK writing back to graphbuffer.
235 GraphTraceLen = 32*64;
236 i = 0;
237 for (bit = 0; bit < 64; bit++) {
238
239 phase = (bits[bit] == 0) ? 0 : 1;
240
241 for (j = 0; j < 32; j++) {
242 GraphBuffer[i++] = phase;
243 phase = !phase;
244 }
245 }
246 RepaintGraphWindow();
247 return 0;
248 }
249
250 int CmdIndalaDemod(const char *Cmd)
251 {
252 // PSK1, Bitrate 32,
253
254 // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
255 int state = -1;
256 int count = 0;
257 int i, j;
258
259 // worst case with GraphTraceLen=64000 is < 4096
260 // under normal conditions it's < 2048
261 uint8_t rawbits[4096];
262
263 int rawbit = 0, worst = 0, worstPos = 0;
264 // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
265
266 // loop through raw signal - since we know it is psk1 rf/32 fc/2 skip every other value (+=2)
267 for (i = 0; i < GraphTraceLen-1; i += 2) {
268 count += 1;
269 if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
270 // appears redundant - marshmellow
271 if (state == 0) {
272 for (j = 0; j < count - 8; j += 16) {
273 rawbits[rawbit++] = 0;
274 }
275 if ((abs(count - j)) > worst) {
276 worst = abs(count - j);
277 worstPos = i;
278 }
279 }
280 state = 1;
281 count = 0;
282 } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
283 //appears redundant
284 if (state == 1) {
285 for (j = 0; j < count - 8; j += 16) {
286 rawbits[rawbit++] = 1;
287 }
288 if ((abs(count - j)) > worst) {
289 worst = abs(count - j);
290 worstPos = i;
291 }
292 }
293 state = 0;
294 count = 0;
295 }
296 }
297
298 if ( rawbit>0 ){
299 PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
300 PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
301 } else {
302 return 0;
303 }
304
305 // Finding the start of a UID
306 int uidlen, long_wait;
307 if (strcmp(Cmd, "224") == 0) {
308 uidlen = 224;
309 long_wait = 30;
310 } else {
311 uidlen = 64;
312 long_wait = 29;
313 }
314
315 int start;
316 int first = 0;
317 for (start = 0; start <= rawbit - uidlen; start++) {
318 first = rawbits[start];
319 for (i = start; i < start + long_wait; i++) {
320 if (rawbits[i] != first) {
321 break;
322 }
323 }
324 if (i == (start + long_wait)) {
325 break;
326 }
327 }
328
329 if (start == rawbit - uidlen + 1) {
330 PrintAndLog("nothing to wait for");
331 return 0;
332 }
333
334 // Inverting signal if needed
335 if (first == 1) {
336 for (i = start; i < rawbit; i++) {
337 rawbits[i] = !rawbits[i];
338 }
339 }
340
341 // Dumping UID
342 uint8_t bits[224] = {0x00};
343 char showbits[225] = {0x00};
344 int bit;
345 i = start;
346 int times = 0;
347
348 if (uidlen > rawbit) {
349 PrintAndLog("Warning: not enough raw bits to get a full UID");
350 for (bit = 0; bit < rawbit; bit++) {
351 bits[bit] = rawbits[i++];
352 // As we cannot know the parity, let's use "." and "/"
353 showbits[bit] = '.' + bits[bit];
354 }
355 showbits[bit+1]='\0';
356 PrintAndLog("Partial UID=%s", showbits);
357 return 0;
358 } else {
359 for (bit = 0; bit < uidlen; bit++) {
360 bits[bit] = rawbits[i++];
361 showbits[bit] = '0' + bits[bit];
362 }
363 times = 1;
364 }
365
366 //convert UID to HEX
367 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
368 int idx;
369 uid1 = uid2 = 0;
370
371 if (uidlen==64){
372 for( idx=0; idx<64; idx++) {
373 if (showbits[idx] == '0') {
374 uid1 = (uid1<<1) | (uid2>>31);
375 uid2 = (uid2<<1) | 0;
376 } else {
377 uid1 = (uid1<<1) | (uid2>>31);
378 uid2 = (uid2<<1) | 1;
379 }
380 }
381 PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
382 } else {
383 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
384
385 for( idx=0; idx<224; idx++) {
386 uid1 = (uid1<<1) | (uid2>>31);
387 uid2 = (uid2<<1) | (uid3>>31);
388 uid3 = (uid3<<1) | (uid4>>31);
389 uid4 = (uid4<<1) | (uid5>>31);
390 uid5 = (uid5<<1) | (uid6>>31);
391 uid6 = (uid6<<1) | (uid7>>31);
392
393 if (showbits[idx] == '0')
394 uid7 = (uid7<<1) | 0;
395 else
396 uid7 = (uid7<<1) | 1;
397 }
398 PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
399 }
400
401 // Checking UID against next occurrences
402 int failed = 0;
403 for (; i + uidlen <= rawbit;) {
404 failed = 0;
405 for (bit = 0; bit < uidlen; bit++) {
406 if (bits[bit] != rawbits[i++]) {
407 failed = 1;
408 break;
409 }
410 }
411 if (failed == 1) {
412 break;
413 }
414 times += 1;
415 }
416
417 PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
418
419 // Remodulating for tag cloning
420 // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
421 // since this changes graphbuffer data.
422 GraphTraceLen = 32 * uidlen;
423 i = 0;
424 int phase = 0;
425 for (bit = 0; bit < uidlen; bit++) {
426 phase = (bits[bit] == 0) ? 0 : 1;
427 int j;
428 for (j = 0; j < 32; j++) {
429 GraphBuffer[i++] = phase;
430 phase = !phase;
431 }
432 }
433
434 RepaintGraphWindow();
435 return 1;
436 }
437
438 int CmdIndalaClone(const char *Cmd){
439 UsbCommand c;
440 unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
441
442 uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
443 int n = 0, i = 0;
444
445 if (strchr(Cmd,'l') != 0) {
446 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
447 uid1 = (uid1 << 4) | (uid2 >> 28);
448 uid2 = (uid2 << 4) | (uid3 >> 28);
449 uid3 = (uid3 << 4) | (uid4 >> 28);
450 uid4 = (uid4 << 4) | (uid5 >> 28);
451 uid5 = (uid5 << 4) | (uid6 >> 28);
452 uid6 = (uid6 << 4) | (uid7 >> 28);
453 uid7 = (uid7 << 4) | (n & 0xf);
454 }
455 PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
456 c.cmd = CMD_INDALA_CLONE_TAG_L;
457 c.d.asDwords[0] = uid1;
458 c.d.asDwords[1] = uid2;
459 c.d.asDwords[2] = uid3;
460 c.d.asDwords[3] = uid4;
461 c.d.asDwords[4] = uid5;
462 c.d.asDwords[5] = uid6;
463 c.d.asDwords[6] = uid7;
464 } else {
465 while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
466 uid1 = (uid1 << 4) | (uid2 >> 28);
467 uid2 = (uid2 << 4) | (n & 0xf);
468 }
469 PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
470 c.cmd = CMD_INDALA_CLONE_TAG;
471 c.arg[0] = uid1;
472 c.arg[1] = uid2;
473 }
474
475 clearCommandBuffer();
476 SendCommand(&c);
477 return 0;
478 }
479
480 int CmdLFSetConfig(const char *Cmd) {
481 uint8_t divisor = 0;//Frequency divisor
482 uint8_t bps = 0; // Bits per sample
483 uint8_t decimation = 0; //How many to keep
484 bool averaging = 1; // Defaults to true
485 bool errors = FALSE;
486 int trigger_threshold = -1;//Means no change
487 uint8_t unsigned_trigg = 0;
488
489 uint8_t cmdp = 0;
490 while(param_getchar(Cmd, cmdp) != 0x00) {
491 switch(param_getchar(Cmd, cmdp)) {
492 case 'h':
493 return usage_lf_config();
494 case 'H':
495 divisor = 88;
496 cmdp++;
497 break;
498 case 'L':
499 divisor = 95;
500 cmdp++;
501 break;
502 case 'q':
503 errors |= param_getdec(Cmd,cmdp+1,&divisor);
504 cmdp+=2;
505 break;
506 case 't':
507 errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
508 cmdp+=2;
509 if(!errors) trigger_threshold = unsigned_trigg;
510 break;
511 case 'b':
512 errors |= param_getdec(Cmd,cmdp+1,&bps);
513 cmdp+=2;
514 break;
515 case 'd':
516 errors |= param_getdec(Cmd,cmdp+1,&decimation);
517 cmdp+=2;
518 break;
519 case 'a':
520 averaging = param_getchar(Cmd,cmdp+1) == '1';
521 cmdp+=2;
522 break;
523 default:
524 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
525 errors = 1;
526 break;
527 }
528 if(errors) break;
529 }
530
531 // No args
532 if (cmdp == 0) errors = 1;
533
534 //Validations
535 if (errors) return usage_lf_config();
536
537 //Bps is limited to 8, so fits in lower half of arg1
538 if (bps >> 4) bps = 8;
539
540 sample_config config = { decimation, bps, averaging, divisor, trigger_threshold };
541
542 //Averaging is a flag on high-bit of arg[1]
543 UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
544 memcpy(c.d.asBytes,&config,sizeof(sample_config));
545 clearCommandBuffer();
546 SendCommand(&c);
547 return 0;
548 }
549
550 int CmdLFRead(const char *Cmd) {
551 bool arg1 = false;
552 uint8_t cmdp = param_getchar(Cmd, 0);
553
554 if ( cmdp == 'h' || cmdp == 'H') return usage_lf_read();
555
556 //suppress print
557 if ( cmdp == 's' || cmdp == 'S') arg1 = true;
558
559 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
560 clearCommandBuffer();
561 SendCommand(&c);
562 if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
563 PrintAndLog("command execution time out");
564 return 1;
565 }
566 return 0;
567 }
568
569 int CmdLFSnoop(const char *Cmd) {
570 uint8_t cmdp = param_getchar(Cmd, 0);
571 if(cmdp == 'h' || cmdp == 'H') return usage_lf_snoop();
572
573 UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
574 clearCommandBuffer();
575 SendCommand(&c);
576 WaitForResponse(CMD_ACK,NULL);
577 return 0;
578 }
579
580 static void ChkBitstream(const char *str) {
581 // convert to bitstream if necessary
582 for (int i = 0; i < (int)(GraphTraceLen / 2); i++){
583 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
584 CmdGetBitStream("");
585 break;
586 }
587 }
588 }
589 //Attempt to simulate any wave in buffer (one bit per output sample)
590 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
591 int CmdLFSim(const char *Cmd) {
592 int i,j;
593 static int gap;
594
595 sscanf(Cmd, "%i", &gap);
596
597 // convert to bitstream if necessary
598 ChkBitstream(Cmd);
599
600 if (g_debugMode)
601 printf("DEBUG: Sending [%d bytes]\n", GraphTraceLen);
602
603 //can send only 512 bits at a time (1 byte sent per bit...)
604 for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
605 UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
606
607 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
608 c.d.asBytes[j] = GraphBuffer[i+j];
609 }
610 clearCommandBuffer();
611 SendCommand(&c);
612 WaitForResponse(CMD_ACK, NULL);
613 printf(".");
614 }
615
616 PrintAndLog("Starting to simulate");
617
618 UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
619 clearCommandBuffer();
620 SendCommand(&c);
621 return 0;
622 }
623
624 // by marshmellow - sim fsk data given clock, fcHigh, fcLow, invert
625 // - allow pull data from DemodBuffer
626 int CmdLFfskSim(const char *Cmd)
627 {
628 //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
629 // otherwise will need FChigh, FClow, Clock, and bitstream
630 uint8_t fcHigh = 0, fcLow = 0, clk = 0;
631 uint8_t invert = 0;
632 bool errors = FALSE;
633 char hexData[32] = {0x00}; // store entered hex data
634 uint8_t data[255] = {0x00};
635 int dataLen = 0;
636 uint8_t cmdp = 0;
637
638 while(param_getchar(Cmd, cmdp) != 0x00) {
639 switch(param_getchar(Cmd, cmdp)){
640 case 'h':
641 return usage_lf_simfsk();
642 case 'i':
643 invert = 1;
644 cmdp++;
645 break;
646 case 'c':
647 errors |= param_getdec(Cmd, cmdp+1, &clk);
648 cmdp += 2;
649 break;
650 case 'H':
651 errors |= param_getdec(Cmd, cmdp+1, &fcHigh);
652 cmdp += 2;
653 break;
654 case 'L':
655 errors |= param_getdec(Cmd, cmdp+1, &fcLow);
656 cmdp += 2;
657 break;
658 //case 's':
659 // separator = 1;
660 // cmdp++;
661 // break;
662 case 'd':
663 dataLen = param_getstr(Cmd, cmdp+1, hexData);
664 if (dataLen == 0)
665 errors = TRUE;
666 else
667 dataLen = hextobinarray((char *)data, hexData);
668
669 if (dataLen == 0) errors = TRUE;
670 if (errors) PrintAndLog ("Error getting hex data");
671 cmdp+=2;
672 break;
673 default:
674 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
675 errors = TRUE;
676 break;
677 }
678 if(errors) break;
679 }
680
681 // No args
682 if(cmdp == 0 && DemodBufferLen == 0)
683 errors = TRUE;
684
685 //Validations
686 if(errors) return usage_lf_simfsk();
687
688 if (dataLen == 0){ //using DemodBuffer
689 if (clk == 0 || fcHigh == 0 || fcLow == 0){ //manual settings must set them all
690 uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
691 if (ans==0){
692 if (!fcHigh) fcHigh = 10;
693 if (!fcLow) fcLow = 8;
694 if (!clk) clk = 50;
695 }
696 }
697 } else {
698 setDemodBuf(data, dataLen, 0);
699 }
700
701 //default if not found
702 if (clk == 0) clk = 50;
703 if (fcHigh == 0) fcHigh = 10;
704 if (fcLow == 0) fcLow = 8;
705
706 uint16_t arg1, arg2;
707 arg1 = fcHigh << 8 | fcLow;
708 arg2 = invert << 8 | clk;
709 size_t size = DemodBufferLen;
710 if (size > USB_CMD_DATA_SIZE) {
711 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
712 size = USB_CMD_DATA_SIZE;
713 }
714 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
715
716 memcpy(c.d.asBytes, DemodBuffer, size);
717 clearCommandBuffer();
718 SendCommand(&c);
719 return 0;
720 }
721
722 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
723 // - allow pull data from DemodBuffer
724 int CmdLFaskSim(const char *Cmd)
725 {
726 // autodetect clock from Graphbuffer if using demod buffer
727 // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
728 uint8_t encoding = 1, separator = 0, clk = 0, invert = 0;
729 bool errors = FALSE;
730 char hexData[32] = {0x00};
731 uint8_t data[255]= {0x00}; // store entered hex data
732 int dataLen = 0;
733 uint8_t cmdp = 0;
734
735 while(param_getchar(Cmd, cmdp) != 0x00) {
736 switch(param_getchar(Cmd, cmdp)) {
737 case 'H':
738 case 'h': return usage_lf_simask();
739 case 'i':
740 invert = 1;
741 cmdp++;
742 break;
743 case 'c':
744 errors |= param_getdec(Cmd, cmdp+1, &clk);
745 cmdp += 2;
746 break;
747 case 'b':
748 encoding = 2; //biphase
749 cmdp++;
750 break;
751 case 'm':
752 encoding = 1; //manchester
753 cmdp++;
754 break;
755 case 'r':
756 encoding = 0; //raw
757 cmdp++;
758 break;
759 case 's':
760 separator = 1;
761 cmdp++;
762 break;
763 case 'd':
764 dataLen = param_getstr(Cmd, cmdp+1, hexData);
765 if (dataLen == 0)
766 errors = TRUE;
767 else
768 dataLen = hextobinarray((char *)data, hexData);
769
770 if (dataLen == 0) errors = TRUE;
771 if (errors) PrintAndLog ("Error getting hex data, datalen: %d", dataLen);
772 cmdp += 2;
773 break;
774 default:
775 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
776 errors = TRUE;
777 break;
778 }
779 if(errors) break;
780 }
781
782 // No args
783 if(cmdp == 0 && DemodBufferLen == 0)
784 errors = TRUE;
785
786 //Validations
787 if(errors) return usage_lf_simask();
788
789 if (dataLen == 0){ //using DemodBuffer
790 if (clk == 0)
791 clk = GetAskClock("0", false, false);
792 } else {
793 setDemodBuf(data, dataLen, 0);
794 }
795 if (clk == 0) clk = 64;
796 if (encoding == 0) clk >>= 2; //askraw needs to double the clock speed
797
798 size_t size = DemodBufferLen;
799
800 if (size > USB_CMD_DATA_SIZE) {
801 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
802 size = USB_CMD_DATA_SIZE;
803 }
804
805 PrintAndLog("preparing to sim ask data: %d bits", size);
806
807 uint16_t arg1, arg2;
808 arg1 = clk << 8 | encoding;
809 arg2 = invert << 8 | separator;
810
811 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
812 memcpy(c.d.asBytes, DemodBuffer, size);
813 clearCommandBuffer();
814 SendCommand(&c);
815 return 0;
816 }
817
818 // by marshmellow - sim psk data given carrier, clock, invert
819 // - allow pull data from DemodBuffer or parameters
820 int CmdLFpskSim(const char *Cmd) {
821 //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
822 //will need carrier, Clock, and bitstream
823 uint8_t carrier=0, clk=0;
824 uint8_t invert=0;
825 bool errors = FALSE;
826 char hexData[32] = {0x00}; // store entered hex data
827 uint8_t data[255] = {0x00};
828 int dataLen = 0;
829 uint8_t cmdp = 0;
830 uint8_t pskType = 1;
831
832 while(param_getchar(Cmd, cmdp) != 0x00) {
833 switch(param_getchar(Cmd, cmdp)) {
834 case 'h':
835 return usage_lf_simpsk();
836 case 'i':
837 invert = 1;
838 cmdp++;
839 break;
840 case 'c':
841 errors |= param_getdec(Cmd,cmdp+1,&clk);
842 cmdp +=2;
843 break;
844 case 'r':
845 errors |= param_getdec(Cmd,cmdp+1,&carrier);
846 cmdp += 2;
847 break;
848 case '1':
849 pskType = 1;
850 cmdp++;
851 break;
852 case '2':
853 pskType = 2;
854 cmdp++;
855 break;
856 case '3':
857 pskType = 3;
858 cmdp++;
859 break;
860 case 'd':
861 dataLen = param_getstr(Cmd, cmdp+1, hexData);
862 if (dataLen == 0)
863 errors = TRUE;
864 else
865 dataLen = hextobinarray((char *)data, hexData);
866
867 if (dataLen == 0) errors = TRUE;
868 if (errors) PrintAndLog ("Error getting hex data");
869 cmdp+=2;
870 break;
871 default:
872 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
873 errors = TRUE;
874 break;
875 }
876 if (errors) break;
877 }
878 // No args
879 if (cmdp == 0 && DemodBufferLen == 0)
880 errors = TRUE;
881
882 //Validations
883 if (errors) return usage_lf_simpsk();
884
885 if (dataLen == 0){ //using DemodBuffer
886 PrintAndLog("Getting Clocks");
887
888 if (clk==0) clk = GetPskClock("", FALSE, FALSE);
889 PrintAndLog("clk: %d",clk);
890
891 if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
892 PrintAndLog("carrier: %d", carrier);
893
894 } else {
895 setDemodBuf(data, dataLen, 0);
896 }
897
898 if (clk <= 0) clk = 32;
899
900 if (carrier == 0) carrier = 2;
901
902 if (pskType != 1){
903 if (pskType == 2){
904 //need to convert psk2 to psk1 data before sim
905 psk2TOpsk1(DemodBuffer, DemodBufferLen);
906 } else {
907 PrintAndLog("Sorry, PSK3 not yet available");
908 }
909 }
910 uint16_t arg1, arg2;
911 arg1 = clk << 8 | carrier;
912 arg2 = invert;
913 size_t size = DemodBufferLen;
914 if (size > USB_CMD_DATA_SIZE) {
915 PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
916 size = USB_CMD_DATA_SIZE;
917 }
918 UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
919 PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
920 memcpy(c.d.asBytes, DemodBuffer, size);
921 clearCommandBuffer();
922 SendCommand(&c);
923 return 0;
924 }
925
926 int CmdLFSimBidir(const char *Cmd) {
927 // Set ADC to twice the carrier for a slight supersampling
928 // HACK: not implemented in ARMSRC.
929 PrintAndLog("Not implemented yet.");
930 UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
931 SendCommand(&c);
932 return 0;
933 }
934
935 int CmdVchDemod(const char *Cmd) {
936 // Is this the entire sync pattern, or does this also include some
937 // data bits that happen to be the same everywhere? That would be
938 // lovely to know.
939 static const int SyncPattern[] = {
940 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
941 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
942 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
943 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
944 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
945 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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 };
951
952 // So first, we correlate for the sync pattern, and mark that.
953 int bestCorrel = 0, bestPos = 0;
954 int i, j, sum = 0;
955
956 // It does us no good to find the sync pattern, with fewer than 2048 samples after it.
957
958 for (i = 0; i < (GraphTraceLen - 2048); i++) {
959 for (j = 0; j < ARRAYLEN(SyncPattern); j++) {
960 sum += GraphBuffer[i+j] * SyncPattern[j];
961 }
962 if (sum > bestCorrel) {
963 bestCorrel = sum;
964 bestPos = i;
965 }
966 }
967 PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
968
969 char bits[257];
970 bits[256] = '\0';
971
972 int worst = INT_MAX, worstPos = 0;
973
974 for (i = 0; i < 2048; i += 8) {
975 sum = 0;
976 for (j = 0; j < 8; j++)
977 sum += GraphBuffer[bestPos+i+j];
978
979 if (sum < 0)
980 bits[i/8] = '.';
981 else
982 bits[i/8] = '1';
983
984 if(abs(sum) < worst) {
985 worst = abs(sum);
986 worstPos = i;
987 }
988 }
989 PrintAndLog("bits:");
990 PrintAndLog("%s", bits);
991 PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
992
993 // clone
994 if (strcmp(Cmd, "clone")==0) {
995 GraphTraceLen = 0;
996 char *s;
997 for(s = bits; *s; s++) {
998 for(j = 0; j < 16; j++) {
999 GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1000 }
1001 }
1002 RepaintGraphWindow();
1003 }
1004 return 0;
1005 }
1006
1007 //by marshmellow
1008 int CmdLFfind(const char *Cmd) {
1009 int ans = 0;
1010 char cmdp = param_getchar(Cmd, 0);
1011 char testRaw = param_getchar(Cmd, 1);
1012 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') return usage_lf_find();
1013
1014 if (!offline && (cmdp != '1')){
1015 CmdLFRead("s");
1016 getSamples("30000", TRUE);
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 // if ( justNoise(GraphBuffer, GraphTraceLen) ) {
1024 // PrintAndLog("Signal looks just like noise. Quitting.");
1025 // return 0;
1026 // }
1027
1028 PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
1029 PrintAndLog("False Positives ARE possible\n");
1030 PrintAndLog("\nChecking for known tags:\n");
1031
1032 ans=CmdFSKdemodIO("");
1033 if (ans>0) {
1034 PrintAndLog("\nValid IO Prox ID Found!");
1035 return 1;
1036 }
1037 ans=CmdFSKdemodPyramid("");
1038 if (ans>0) {
1039 PrintAndLog("\nValid Pyramid ID Found!");
1040 return 1;
1041 }
1042 ans=CmdFSKdemodParadox("");
1043 if (ans>0) {
1044 PrintAndLog("\nValid Paradox ID Found!");
1045 return 1;
1046 }
1047 ans=CmdFSKdemodAWID("");
1048 if (ans>0) {
1049 PrintAndLog("\nValid AWID ID Found!");
1050 return 1;
1051 }
1052 ans=CmdFSKdemodHID("");
1053 if (ans>0) {
1054 PrintAndLog("\nValid HID Prox ID Found!");
1055 return 1;
1056 }
1057 ans=CmdAskEM410xDemod("");
1058 if (ans>0) {
1059 PrintAndLog("\nValid EM410x ID Found!");
1060 return 1;
1061 }
1062 ans=CmdG_Prox_II_Demod("");
1063 if (ans>0) {
1064 PrintAndLog("\nValid Guardall G-Prox II ID Found!");
1065 return 1;
1066 }
1067 ans=CmdFDXBdemodBI("");
1068 if (ans>0) {
1069 PrintAndLog("\nValid FDX-B ID Found!");
1070 return 1;
1071 }
1072 ans=EM4x50Read("", false);
1073 if (ans>0) {
1074 PrintAndLog("\nValid EM4x50 ID Found!");
1075 return 1;
1076 }
1077 ans=CmdVikingDemod("");
1078 if (ans>0) {
1079 PrintAndLog("\nValid Viking ID Found!");
1080 return 1;
1081 }
1082 ans=CmdIndalaDecode("");
1083 if (ans>0) {
1084 PrintAndLog("\nValid Indala ID Found!");
1085 return 1;
1086 }
1087 ans=CmdPSKNexWatch("");
1088 if (ans>0) {
1089 PrintAndLog("\nValid NexWatch ID Found!");
1090 return 1;
1091 }
1092 ans=CmdJablotronDemod("");
1093 if (ans>0) {
1094 PrintAndLog("\nValid Jablotron ID Found!");
1095 return 1;
1096 }
1097 ans=CmdLFNedapDemod("");
1098 if (ans>0) {
1099 PrintAndLog("\nValid NEDAP ID Found!");
1100 return 1;
1101 }
1102 ans=CmdVisa2kDemod("");
1103 if (ans>0) {
1104 PrintAndLog("\nValid Visa2000 ID Found!");
1105 return 1;
1106 }
1107 ans=CmdNoralsyDemod("");
1108 if (ans>0) {
1109 PrintAndLog("\nValid Noralsy ID Found!");
1110 return 1;
1111 }
1112 ans=CmdPrescoDemod("");
1113 if (ans>0) {
1114 PrintAndLog("\nValid Presco ID Found!");
1115 return 1;
1116 }
1117 // TIdemod?
1118
1119
1120 PrintAndLog("\nNo Known Tags Found!\n");
1121 if (testRaw=='u' || testRaw=='U'){
1122 //test unknown tag formats (raw mode)
1123 PrintAndLog("\nChecking for Unknown tags:\n");
1124 ans=AutoCorrelate(4000, FALSE, FALSE);
1125
1126 if (ans > 0) {
1127
1128 PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1129
1130 if ( ans % 8 == 0) {
1131 int bytes = (ans / 8);
1132 PrintAndLog("Possible %d bytes", bytes);
1133 int blocks = 0;
1134 if ( bytes % 2 == 0) {
1135 blocks = (bytes / 2);
1136 PrintAndLog("Possible 2 blocks, width %d", blocks);
1137 }
1138 if ( bytes % 4 == 0) {
1139 blocks = (bytes / 4);
1140 PrintAndLog("Possible 4 blocks, width %d", blocks);
1141 }
1142 if ( bytes % 8 == 0) {
1143 blocks = (bytes / 8);
1144 PrintAndLog("Possible 8 blocks, width %d", blocks);
1145 }
1146 if ( bytes % 16 == 0) {
1147 blocks = (bytes / 16);
1148 PrintAndLog("Possible 16 blocks, width %d", blocks);
1149 }
1150 }
1151 }
1152
1153 ans=GetFskClock("",FALSE,FALSE);
1154 if (ans != 0){ //fsk
1155 ans=FSKrawDemod("",TRUE);
1156 if (ans>0) {
1157 PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1158 return 1;
1159 }
1160 }
1161 bool st = TRUE;
1162 ans=ASKDemod_ext("0 0 0",TRUE,FALSE,1,&st);
1163 if (ans>0) {
1164 PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1165 PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1166 return 1;
1167 }
1168
1169 ans=CmdPSK1rawDemod("");
1170 if (ans>0) {
1171 PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1172 PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1173 PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1174 return 1;
1175 }
1176 PrintAndLog("\nNo Data Found!\n");
1177 }
1178 return 0;
1179 }
1180
1181 static command_t CommandTable[] =
1182 {
1183 {"help", CmdHelp, 1, "This help"},
1184 {"animal", CmdLFFdx, 1, "{ Animal RFIDs... }"},
1185 {"awid", CmdLFAWID, 1, "{ AWID RFIDs... }"},
1186 {"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
1187 {"guard", CmdLFGuard, 1, "{ Guardall RFIDs... }"},
1188 {"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
1189 {"hitag", CmdLFHitag, 1, "{ HITAG RFIDs... }"},
1190 // {"indala", CmdLFIndala, 1, "{ Indala RFIDs... }"},
1191 {"io", CmdLFIO, 1, "{ IOPROX RFIDs... }"},
1192 {"jablotron", CmdLFJablotron, 1, "{ Jablotron RFIDs... }"},
1193 {"nedap", CmdLFNedap, 1, "{ Nedap RFIDs... }"},
1194 {"noralsy", CmdLFNoralsy, 1, "{ Noralsy RFIDs... }"},
1195 {"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
1196 {"presco", CmdLFPresco, 1, "{ Presco RFIDs... }"},
1197 {"pyramid", CmdLFPyramid, 1, "{ Farpointe/Pyramid RFIDs... }"},
1198 {"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
1199 {"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
1200 {"viking", CmdLFViking, 1, "{ Viking RFIDs... }"},
1201 {"visa2000", CmdLFVisa2k, 1, "{ Visa2000 RFIDs... }"},
1202 {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1203 {"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)"},
1204 {"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
1205 {"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1206 {"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1207 {"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1208 {"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"},
1209 {"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1210 {"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"},
1211 {"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
1212 {"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"},
1213 {"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1214 {"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
1215 {"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
1216 {NULL, NULL, 0, NULL}
1217 };
1218
1219 int CmdLF(const char *Cmd) {
1220 clearCommandBuffer();
1221 CmdsParse(CommandTable, Cmd);
1222 return 0;
1223 }
1224
1225 int CmdHelp(const char *Cmd) {
1226 CmdsHelp(CommandTable);
1227 return 0;
1228 }
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