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[proxmark3-svn] / client / cmdlfem4x.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 EM4x commands
9 //-----------------------------------------------------------------------------
10
11 #include "cmdlfem4x.h"
12
13 uint64_t g_em410xid = 0;
14
15 static int CmdHelp(const char *Cmd);
16
17 int CmdEMdemodASK(const char *Cmd)
18 {
19 char cmdp = param_getchar(Cmd, 0);
20 uint8_t findone = (cmdp == '1') ? 1 : 0;
21 UsbCommand c = {CMD_EM410X_DEMOD, {findone, 0, 0}};
22 SendCommand(&c);
23 return 0;
24 }
25
26 /* Read the ID of an EM410x tag.
27 * Format:
28 * 1111 1111 1 <-- standard non-repeatable header
29 * XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
30 * ....
31 * CCCC <-- each bit here is parity for the 10 bits above in corresponding column
32 * 0 <-- stop bit, end of tag
33 */
34 int CmdEM410xRead(const char *Cmd)
35 {
36 uint32_t hi=0;
37 uint64_t lo=0;
38
39 if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
40 PrintAndLog("EM410x pattern found: ");
41 printEM410x(hi, lo);
42 if (hi){
43 PrintAndLog ("EM410x XL pattern found");
44 return 0;
45 }
46 g_em410xid = lo;
47 return 1;
48 }
49
50
51 int usage_lf_em410x_sim(void) {
52 PrintAndLog("Simulating EM410x tag");
53 PrintAndLog("");
54 PrintAndLog("Usage: lf em4x em410xsim [h] <uid> <clock>");
55 PrintAndLog("Options:");
56 PrintAndLog(" h - this help");
57 PrintAndLog(" uid - uid (10 HEX symbols)");
58 PrintAndLog(" clock - clock (32|64) (optional)");
59 PrintAndLog("samples:");
60 PrintAndLog(" lf em4x em410xsim 0F0368568B");
61 PrintAndLog(" lf em4x em410xsim 0F0368568B 32");
62 return 0;
63 }
64
65 // emulate an EM410X tag
66 int CmdEM410xSim(const char *Cmd)
67 {
68 int i, n, j, binary[4], parity[4];
69 uint8_t uid[5] = {0x00};
70
71 char cmdp = param_getchar(Cmd, 0);
72 if (cmdp == 'h' || cmdp == 'H') return usage_lf_em410x_sim();
73
74 /* clock is 64 in EM410x tags */
75 uint8_t clock = 64;
76
77 if (param_gethex(Cmd, 0, uid, 10)) {
78 PrintAndLog("UID must include 10 HEX symbols");
79 return 0;
80 }
81
82 param_getdec(Cmd, 1, &clock);
83
84 PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X clock: %d", uid[0],uid[1],uid[2],uid[3],uid[4],clock);
85 PrintAndLog("Press pm3-button to about simulation");
86
87 /* clear our graph */
88 ClearGraph(0);
89
90 /* write 9 start bits */
91 for (i = 0; i < 9; i++)
92 AppendGraph(0, clock, 1);
93
94 /* for each hex char */
95 parity[0] = parity[1] = parity[2] = parity[3] = 0;
96 for (i = 0; i < 10; i++)
97 {
98 /* read each hex char */
99 sscanf(&Cmd[i], "%1x", &n);
100 for (j = 3; j >= 0; j--, n/= 2)
101 binary[j] = n % 2;
102
103 /* append each bit */
104 AppendGraph(0, clock, binary[0]);
105 AppendGraph(0, clock, binary[1]);
106 AppendGraph(0, clock, binary[2]);
107 AppendGraph(0, clock, binary[3]);
108
109 /* append parity bit */
110 AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
111
112 /* keep track of column parity */
113 parity[0] ^= binary[0];
114 parity[1] ^= binary[1];
115 parity[2] ^= binary[2];
116 parity[3] ^= binary[3];
117 }
118
119 /* parity columns */
120 AppendGraph(0, clock, parity[0]);
121 AppendGraph(0, clock, parity[1]);
122 AppendGraph(0, clock, parity[2]);
123 AppendGraph(0, clock, parity[3]);
124
125 /* stop bit */
126 AppendGraph(1, clock, 0);
127
128 CmdLFSim("0"); //240 start_gap.
129 return 0;
130 }
131
132 /* Function is equivalent of lf read + data samples + em410xread
133 * looped until an EM410x tag is detected
134 *
135 * Why is CmdSamples("16000")?
136 * TBD: Auto-grow sample size based on detected sample rate. IE: If the
137 * rate gets lower, then grow the number of samples
138 * Changed by martin, 4000 x 4 = 16000,
139 * see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
140 */
141 int CmdEM410xWatch(const char *Cmd)
142 {
143 do {
144 if (ukbhit()) {
145 printf("\naborted via keyboard!\n");
146 break;
147 }
148
149 CmdLFRead("s");
150 getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)
151 } while (!CmdEM410xRead(""));
152
153 return 0;
154 }
155
156 //currently only supports manchester modulations
157 // todo: helptext
158 int CmdEM410xWatchnSpoof(const char *Cmd)
159 {
160 // loops if the captured ID was in XL-format.
161 CmdEM410xWatch(Cmd);
162 PrintAndLog("# Replaying captured ID: %llu", g_em410xid);
163 CmdLFaskSim("");
164 return 0;
165 }
166
167 int CmdEM410xWrite(const char *Cmd)
168 {
169 uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
170 int card = 0xFF; // invalid card value
171 uint32_t clock = 0; // invalid clock value
172
173 sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
174
175 // Check ID
176 if (id == 0xFFFFFFFFFFFFFFFF) {
177 PrintAndLog("Error! ID is required.\n");
178 return 0;
179 }
180 if (id >= 0x10000000000) {
181 PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
182 return 0;
183 }
184
185 // Check Card
186 if (card == 0xFF) {
187 PrintAndLog("Error! Card type required.\n");
188 return 0;
189 }
190 if (card < 0) {
191 PrintAndLog("Error! Bad card type selected.\n");
192 return 0;
193 }
194
195 // Check Clock
196 // Default: 64
197 if (clock == 0)
198 clock = 64;
199
200 // Allowed clock rates: 16, 32, 40 and 64
201 if ((clock != 16) && (clock != 32) && (clock != 64) && (clock != 40)) {
202 PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32, 40 and 64.\n", clock);
203 return 0;
204 }
205
206 if (card == 1) {
207 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
208 // NOTE: We really should pass the clock in as a separate argument, but to
209 // provide for backwards-compatibility for older firmware, and to avoid
210 // having to add another argument to CMD_EM410X_WRITE_TAG, we just store
211 // the clock rate in bits 8-15 of the card value
212 card = (card & 0xFF) | ((clock << 8) & 0xFF00);
213 } else if (card == 0) {
214 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
215 card = (card & 0xFF) | ((clock << 8) & 0xFF00);
216 } else {
217 PrintAndLog("Error! Bad card type selected.\n");
218 return 0;
219 }
220
221 UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
222 SendCommand(&c);
223 return 0;
224 }
225
226 bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
227 {
228 if (rows*cols>size) return false;
229 uint8_t colP=0;
230 //assume last col is a parity and do not test
231 for (uint8_t colNum = 0; colNum < cols-1; colNum++) {
232 for (uint8_t rowNum = 0; rowNum < rows; rowNum++) {
233 colP ^= BitStream[(rowNum*cols)+colNum];
234 }
235 if (colP != pType) return false;
236 }
237 return true;
238 }
239
240 bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
241 {
242 if (rows*cols>size) return false;
243 uint8_t rowP=0;
244 //assume last row is a parity row and do not test
245 for (uint8_t rowNum = 0; rowNum < rows-1; rowNum++) {
246 for (uint8_t colNum = 0; colNum < cols; colNum++) {
247 rowP ^= BitStream[(rowNum*cols)+colNum];
248 }
249 if (rowP != pType) return false;
250 }
251 return true;
252 }
253
254 uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)
255 {
256 if (size<45) return 0;
257
258 uint32_t code = bytebits_to_byte(BitStream,8);
259 code = code<<8 | bytebits_to_byte(BitStream+9,8);
260 code = code<<8 | bytebits_to_byte(BitStream+18,8);
261 code = code<<8 | bytebits_to_byte(BitStream+27,8);
262
263 if (verbose || g_debugMode){
264 for (uint8_t i = 0; i<5; i++){
265 if (i == 4) PrintAndLog(""); //parity byte spacer
266 PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x",
267 BitStream[i*9],
268 BitStream[i*9+1],
269 BitStream[i*9+2],
270 BitStream[i*9+3],
271 BitStream[i*9+4],
272 BitStream[i*9+5],
273 BitStream[i*9+6],
274 BitStream[i*9+7],
275 BitStream[i*9+8],
276 bytebits_to_byte(BitStream+i*9,8)
277 );
278 }
279 if (pTest)
280 PrintAndLog("Parity Passed");
281 else
282 PrintAndLog("Parity Failed");
283 }
284 return code;
285 }
286 /* Read the transmitted data of an EM4x50 tag from the graphbuffer
287 * Format:
288 *
289 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
290 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
291 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
292 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
293 * CCCCCCCC <- column parity bits
294 * 0 <- stop bit
295 * LW <- Listen Window
296 *
297 * This pattern repeats for every block of data being transmitted.
298 * Transmission starts with two Listen Windows (LW - a modulated
299 * pattern of 320 cycles each (32/32/128/64/64)).
300 *
301 * Note that this data may or may not be the UID. It is whatever data
302 * is stored in the blocks defined in the control word First and Last
303 * Word Read values. UID is stored in block 32.
304 */
305 //completed by Marshmellow
306 int EM4x50Read(const char *Cmd, bool verbose)
307 {
308
309 uint8_t fndClk[] = {8,16,32,40,50,64,128};
310 int clk = 0;
311 int invert = 0;
312 int tol = 0;
313 int i, j, startblock, skip, block, start, end, low, high, minClk;
314 bool complete = false;
315 int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
316 uint32_t Code[6];
317 char tmp[6];
318 char tmp2[20];
319 int phaseoff;
320 high = low = 0;
321 memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
322
323 // get user entry if any
324 sscanf(Cmd, "%i %i", &clk, &invert);
325
326 // save GraphBuffer - to restore it later
327 save_restoreGB(1);
328
329 // first get high and low values
330 for (i = 0; i < GraphTraceLen; i++) {
331 if (GraphBuffer[i] > high)
332 high = GraphBuffer[i];
333 else if (GraphBuffer[i] < low)
334 low = GraphBuffer[i];
335 }
336
337 i = 0;
338 j = 0;
339 minClk = 255;
340 // get to first full low to prime loop and skip incomplete first pulse
341 while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
342 ++i;
343 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
344 ++i;
345 skip = i;
346
347 // populate tmpbuff buffer with pulse lengths
348 while (i < GraphTraceLen) {
349 // measure from low to low
350 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
351 ++i;
352 start= i;
353 while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
354 ++i;
355 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
356 ++i;
357 if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
358 break;
359 }
360 tmpbuff[j++]= i - start;
361 if (i-start < minClk && i < GraphTraceLen) {
362 minClk = i - start;
363 }
364 }
365 // set clock
366 if (!clk) {
367 for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
368 tol = fndClk[clkCnt]/8;
369 if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) {
370 clk=fndClk[clkCnt];
371 break;
372 }
373 }
374 if (!clk) {
375 PrintAndLog("ERROR: EM4x50 - didn't find a clock");
376 return 0;
377 }
378 } else tol = clk/8;
379
380 // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2)
381 start = -1;
382 for (i= 0; i < j - 4 ; ++i) {
383 skip += tmpbuff[i];
384 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks
385 if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks
386 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
387 if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following
388 {
389 start= i + 4;
390 break;
391 }
392 }
393 startblock = i + 4;
394
395 // skip over the remainder of LW
396 skip += tmpbuff[i+1] + tmpbuff[i+2] + clk;
397 if (tmpbuff[i+3]>clk)
398 phaseoff = tmpbuff[i+3]-clk;
399 else
400 phaseoff = 0;
401 // now do it again to find the end
402 end = skip;
403 for (i += 3; i < j - 4 ; ++i) {
404 end += tmpbuff[i];
405 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks
406 if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks
407 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
408 if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following
409 {
410 complete= true;
411 break;
412 }
413 }
414 end = i;
415 // report back
416 if (verbose || g_debugMode) {
417 if (start >= 0) {
418 PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)");
419 } else {
420 PrintAndLog("No data found!, clock tried:%d",clk);
421 PrintAndLog("Try again with more samples.");
422 PrintAndLog(" or after a 'data askedge' command to clean up the read");
423 return 0;
424 }
425 } else if (start < 0) return 0;
426 start = skip;
427 snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47);
428 // get rid of leading crap
429 snprintf(tmp, sizeof(tmp), "%i", skip);
430 CmdLtrim(tmp);
431 bool pTest;
432 bool AllPTest = true;
433 // now work through remaining buffer printing out data blocks
434 block = 0;
435 i = startblock;
436 while (block < 6) {
437 if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block);
438 skip = phaseoff;
439
440 // look for LW before start of next block
441 for ( ; i < j - 4 ; ++i) {
442 skip += tmpbuff[i];
443 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)
444 if (tmpbuff[i+1] >= clk-tol)
445 break;
446 }
447 if (i >= j-4) break; //next LW not found
448 skip += clk;
449 if (tmpbuff[i+1]>clk)
450 phaseoff = tmpbuff[i+1]-clk;
451 else
452 phaseoff = 0;
453 i += 2;
454 if (ASKDemod(tmp2, false, false, 1) < 1) {
455 save_restoreGB(0);
456 return 0;
457 }
458 //set DemodBufferLen to just one block
459 DemodBufferLen = skip/clk;
460 //test parities
461 pTest = EM_ByteParityTest(DemodBuffer,DemodBufferLen,5,9,0);
462 pTest &= EM_EndParityTest(DemodBuffer,DemodBufferLen,5,9,0);
463 AllPTest &= pTest;
464 //get output
465 Code[block] = OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest);
466 if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d", skip, skip/clk);
467 //skip to start of next block
468 snprintf(tmp,sizeof(tmp),"%i",skip);
469 CmdLtrim(tmp);
470 block++;
471 if (i >= end) break; //in case chip doesn't output 6 blocks
472 }
473 //print full code:
474 if (verbose || g_debugMode || AllPTest){
475 if (!complete) {
476 PrintAndLog("*** Warning!");
477 PrintAndLog("Partial data - no end found!");
478 PrintAndLog("Try again with more samples.");
479 }
480 PrintAndLog("Found data at sample: %i - using clock: %i", start, clk);
481 end = block;
482 for (block=0; block < end; block++){
483 PrintAndLog("Block %d: %08x",block,Code[block]);
484 }
485 if (AllPTest) {
486 PrintAndLog("Parities Passed");
487 } else {
488 PrintAndLog("Parities Failed");
489 PrintAndLog("Try cleaning the read samples with 'data askedge'");
490 }
491 }
492
493 //restore GraphBuffer
494 save_restoreGB(0);
495 return (int)AllPTest;
496 }
497
498 int CmdEM4x50Read(const char *Cmd) {
499 return EM4x50Read(Cmd, true);
500 }
501
502 int usage_lf_em_read(void) {
503 PrintAndLog("Read EM4x50. Tag must be on antenna. ");
504 PrintAndLog("");
505 PrintAndLog("Usage: lf em readword [h] <address> <pwd>");
506 PrintAndLog("Options:");
507 PrintAndLog(" h - this help");
508 PrintAndLog(" address - memory address to read. (0-15)");
509 PrintAndLog(" pwd - password (hex) (optional)");
510 PrintAndLog("samples:");
511 PrintAndLog(" lf em readword 1");
512 PrintAndLog(" lf em readword 1 11223344");
513 return 0;
514 }
515 int CmdReadWord(const char *Cmd) {
516 int addr, pwd;
517 bool usePwd = false;
518 uint8_t ctmp = param_getchar(Cmd, 0);
519 if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_read();
520
521 addr = param_get8ex(Cmd, 0, -1, 10);
522 pwd = param_get32ex(Cmd, 1, -1, 16);
523
524 if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
525 PrintAndLog("Address must be between 0 and 15");
526 return 1;
527 }
528 if ( pwd == -1 )
529 PrintAndLog("Reading address %d", addr);
530 else {
531 usePwd = true;
532 PrintAndLog("Reading address %d | password %08X", addr, pwd);
533 }
534
535 UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}};
536 clearCommandBuffer();
537 SendCommand(&c);
538 UsbCommand resp;
539 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)){
540 PrintAndLog("Command timed out");
541 return -1;
542 }
543
544 uint8_t got[6000];
545 GetFromBigBuf(got, sizeof(got), 0);
546 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) {
547 PrintAndLog("command execution time out");
548 return -1;
549 }
550 setGraphBuf(got, sizeof(got));
551
552
553 int ans = 0;
554 //bool ST = true;
555 DemodBufferLen = 0x00;
556
557 //ans = ASKDemod_ext("0 0 1", FALSE, FALSE, 1, &ST);
558 ans = ASKbiphaseDemod("0 0 1", FALSE);
559 if (!ans) {
560 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
561 return -1;
562 }
563
564 size_t startIdx = 0, size = DemodBufferLen;
565
566 PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size);
567
568
569 uint8_t preamble[8] = {0,0,0,0,1,0,1,0};
570 uint8_t errChk = !preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx);
571 if ( errChk == 0) {
572 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
573 return -1;
574 }
575
576 // sanity check.
577 if (size != 32) {
578 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 incorrect data length found, %u", size );
579 return -1;
580 }
581
582 //setDemodBuf(BitStream, 32, preambleIndex);
583
584 return 1;
585 }
586
587 int usage_lf_em_write(void) {
588 PrintAndLog("Write EM4x50. Tag must be on antenna. ");
589 PrintAndLog("");
590 PrintAndLog("Usage: lf em writeword [h] <address> <data> <pwd>");
591 PrintAndLog("Options:");
592 PrintAndLog(" h - this help");
593 PrintAndLog(" address - memory address to write to. (0-15)");
594 PrintAndLog(" data - data to write (hex)");
595 PrintAndLog(" pwd - password (hex) (optional)");
596 PrintAndLog("samples:");
597 PrintAndLog(" lf em writeword 1");
598 PrintAndLog(" lf em writeword 1 deadc0de 11223344");
599 return 0;
600 }
601 int CmdWriteWord(const char *Cmd) {
602 uint8_t ctmp = param_getchar(Cmd, 0);
603 if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_write();
604
605 bool usePwd = false;
606
607 int addr = 16; // default to invalid address
608 int data = 0xFFFFFFFF; // default to blank data
609 int pwd = 0xFFFFFFFF; // default to blank password
610
611 addr = param_get8ex(Cmd, 0, -1, 10);
612 data = param_get32ex(Cmd, 1, -1, 16);
613 pwd = param_get32ex(Cmd, 2, -1, 16);
614
615
616 if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
617 PrintAndLog("Address must be between 0 and 15");
618 return 1;
619 }
620 if ( pwd == -1 )
621 PrintAndLog("Writing address %d data %08X", addr, data);
622 else {
623 usePwd = true;
624 PrintAndLog("Writing address %d data %08X using password %08X", addr, data, pwd);
625 }
626
627 uint16_t flag = (addr << 8 ) | usePwd;
628
629 UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}};
630 clearCommandBuffer();
631 SendCommand(&c);
632 UsbCommand resp;
633 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
634 PrintAndLog("Error occurred, device did not respond during write operation.");
635 return -1;
636 }
637
638 //get response if there is one
639 uint8_t got[6000]; // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples)
640 GetFromBigBuf(got, sizeof(got), 0);
641 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 8000) ) {
642 PrintAndLog("command execution time out");
643 return -2;
644 }
645 setGraphBuf(got, sizeof(got));
646
647 int ans = 0;
648 //bool ST = true;
649 DemodBufferLen = 0x00;
650
651 //ans = ASKDemod_ext("0 0 1", FALSE, FALSE, 1, &ST);
652 ans = ASKbiphaseDemod("0 0 1", FALSE);
653 if (!ans) {
654 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
655 return -3;
656 }
657 PrintAndLog("ANS: %d", ans);
658
659 //todo: check response for 00001010 then write data for write confirmation!
660 size_t startIdx = 0, size = DemodBufferLen;
661
662 uint8_t preamble[8] = {0,0,0,0,1,0,1,0};
663 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
664 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
665 return -4;
666 }
667 PrintAndLog("Write OK");
668 return 0;
669 }
670
671 static command_t CommandTable[] = {
672 {"help", CmdHelp, 1, "This help"},
673 {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
674 {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"},
675 {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
676 {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
677 {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
678 {"em410xwrite", CmdEM410xWrite, 0, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
679 {"em4x50read", CmdEM4x50Read, 1, "demod data from EM4x50 tag from the graphbuffer"},
680 {"readword", CmdReadWord, 1, "read EM4x05/4x69 data"},
681 {"writeword", CmdWriteWord, 1, "write EM405/4x69 data"},
682 {NULL, NULL, 0, NULL}
683 };
684
685 int CmdLFEM4X(const char *Cmd) {
686 clearCommandBuffer();
687 CmdsParse(CommandTable, Cmd);
688 return 0;
689 }
690
691 int CmdHelp(const char *Cmd) {
692 CmdsHelp(CommandTable);
693 return 0;
694 }
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