]> git.zerfleddert.de Git - proxmark3-svn/blame - client/cmdlfem4x.c
FIX: memcpy bug...
[proxmark3-svn] / client / cmdlfem4x.c
CommitLineData
a553f267 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
7fe9b0b7 11#include "cmdlfem4x.h"
0ad1a1d4 12
3c6354e9 13uint64_t g_em410xid = 0;
7fe9b0b7 14
15static int CmdHelp(const char *Cmd);
16
66707a3b 17int CmdEMdemodASK(const char *Cmd)
18{
3fe4ff4f 19 char cmdp = param_getchar(Cmd, 0);
cb1ba30a 20 uint8_t findone = (cmdp == '1') ? 1 : 0;
21 UsbCommand c = {CMD_EM410X_DEMOD, {findone, 0, 0}};
23f0a7d8 22 SendCommand(&c);
23 return 0;
66707a3b 24}
25
7fe9b0b7 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 */
34int CmdEM410xRead(const char *Cmd)
35{
23f0a7d8 36 uint32_t hi=0;
37 uint64_t lo=0;
38
fef74fdc 39 if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
23f0a7d8 40 PrintAndLog("EM410x pattern found: ");
41 printEM410x(hi, lo);
42 if (hi){
43 PrintAndLog ("EM410x XL pattern found");
44 return 0;
45 }
3c6354e9 46 g_em410xid = lo;
23f0a7d8 47 return 1;
7fe9b0b7 48}
49
cb1ba30a 50
51int 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
13d77ef9 65// emulate an EM410X tag
7fe9b0b7 66int CmdEM410xSim(const char *Cmd)
67{
3fe4ff4f 68 int i, n, j, binary[4], parity[4];
3fe4ff4f 69 uint8_t uid[5] = {0x00};
70
015e3b81 71 char cmdp = param_getchar(Cmd, 0);
cb1ba30a 72 if (cmdp == 'h' || cmdp == 'H') return usage_lf_em410x_sim();
73
bca71079 74 /* clock is 64 in EM410x tags */
75 uint8_t clock = 64;
3fe4ff4f 76
77 if (param_gethex(Cmd, 0, uid, 10)) {
78 PrintAndLog("UID must include 10 HEX symbols");
79 return 0;
80 }
cb1ba30a 81
bca71079 82 param_getdec(Cmd, 1, &clock);
3fe4ff4f 83
bca71079 84 PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X clock: %d", uid[0],uid[1],uid[2],uid[3],uid[4],clock);
3fe4ff4f 85 PrintAndLog("Press pm3-button to about simulation");
7fe9b0b7 86
23f0a7d8 87 /* clear our graph */
88 ClearGraph(0);
89
015e3b81 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 }
23f0a7d8 118
015e3b81 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]);
23f0a7d8 124
015e3b81 125 /* stop bit */
23f0a7d8 126 AppendGraph(1, clock, 0);
3fe4ff4f 127
23f0a7d8 128 CmdLFSim("0"); //240 start_gap.
129 return 0;
7fe9b0b7 130}
131
3fe4ff4f 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
3fe4ff4f 140*/
7fe9b0b7 141int CmdEM410xWatch(const char *Cmd)
142{
3fe4ff4f 143 do {
144 if (ukbhit()) {
145 printf("\naborted via keyboard!\n");
146 break;
147 }
148
1fbf8956 149 CmdLFRead("s");
2767fc02 150 getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)
13d77ef9 151 } while (!CmdEM410xRead(""));
152
3fe4ff4f 153 return 0;
7fe9b0b7 154}
155
23f0a7d8 156//currently only supports manchester modulations
3c6354e9 157// todo: helptext
c3bfb9c7 158int CmdEM410xWatchnSpoof(const char *Cmd)
159{
3c6354e9 160 // loops if the captured ID was in XL-format.
36d87eef 161 CmdEM410xWatch(Cmd);
162 PrintAndLog("# Replaying captured ID: %llu", g_em410xid);
163 CmdLFaskSim("");
1fbf8956 164 return 0;
c3bfb9c7 165}
166
2d4eae76 167int CmdEM410xWrite(const char *Cmd)
168{
6e984446 169 uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
170 int card = 0xFF; // invalid card value
8ce3e4b4 171 uint32_t clock = 0; // invalid clock value
e67b06b7 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
e67b06b7 196 // Default: 64
8ce3e4b4 197 if (clock == 0)
198 clock = 64;
e67b06b7 199
bca71079 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);
e67b06b7 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
bca71079 212 card = (card & 0xFF) | ((clock << 8) & 0xFF00);
213 } else if (card == 0) {
e67b06b7 214 PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
bca71079 215 card = (card & 0xFF) | ((clock << 8) & 0xFF00);
216 } else {
e67b06b7 217 PrintAndLog("Error! Bad card type selected.\n");
218 return 0;
219 }
2d4eae76 220
6e984446 221 UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
222 SendCommand(&c);
6e984446 223 return 0;
224}
2d4eae76 225
23f0a7d8 226bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
227{
9932c55a 228 if (rows*cols>size) return FALSE;
23f0a7d8 229 uint8_t colP=0;
cc15a118 230 //assume last col is a parity and do not test
23f0a7d8 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 }
9932c55a 235 if (colP != pType) return FALSE;
23f0a7d8 236 }
9932c55a 237 return TRUE;
23f0a7d8 238}
239
240bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
241{
9932c55a 242 if (rows*cols>size) return FALSE;
23f0a7d8 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 }
9932c55a 249 if (rowP != pType) return FALSE;
250 }
251 return TRUE;
252}
253
254// EM word parity test.
255// 9*5 = 45 bits in total
256// 012345678|r1
257// 012345678|r2
258// 012345678|r3
259// 012345678|r4
260// ------------
261//c012345678| 0
262// |- must be zero
263
264bool EMwordparitytest(uint8_t *bits){
265
266 // last row/col parity must be 0
267 if (bits[44] != 0 ) return FALSE;
268
269 // col parity check
270 uint8_t c1 = bytebits_to_byte(bits, 8) ^ bytebits_to_byte(bits+9, 8) ^ bytebits_to_byte(bits+18, 8) ^ bytebits_to_byte(bits+27, 8);
271 uint8_t c2 = bytebits_to_byte(bits+36, 8);
272 if ( c1 != c2 ) return FALSE;
273
274 // row parity check
275 uint8_t rowP = 0;
276 for ( uint8_t i = 0; i < 36; ++i ) {
277
278 rowP ^= bits[i];
279 if ( i>0 && (i % 9) == 0) {
280
281 if ( rowP != EVEN )
282 return FALSE;
283
284 rowP = 0;
285 }
23f0a7d8 286 }
9932c55a 287 // all checks ok.
288 return TRUE;
23f0a7d8 289}
290
4ac9f078 291
292//////////////// 4050 / 4450 commands
293int usage_lf_em4x50_dump(void) {
294 PrintAndLog("Dump EM4x50/EM4x69. Tag must be on antenna. ");
295 PrintAndLog("");
296 PrintAndLog("Usage: lf em 4x50dump [h] <pwd>");
297 PrintAndLog("Options:");
298 PrintAndLog(" h - this help");
299 PrintAndLog(" pwd - password (hex) (optional)");
300 PrintAndLog("samples:");
301 PrintAndLog(" lf em 4x50dump");
302 PrintAndLog(" lf em 4x50dump 11223344");
303 return 0;
304}
305int usage_lf_em4x50_read(void) {
306 PrintAndLog("Read EM 4x50/EM4x69. Tag must be on antenna. ");
307 PrintAndLog("");
308 PrintAndLog("Usage: lf em 4x50read [h] <address> <pwd>");
309 PrintAndLog("Options:");
310 PrintAndLog(" h - this help");
311 PrintAndLog(" address - memory address to read. (0-15)");
312 PrintAndLog(" pwd - password (hex) (optional)");
313 PrintAndLog("samples:");
314 PrintAndLog(" lf em 4x50read 1");
315 PrintAndLog(" lf em 4x50read 1 11223344");
316 return 0;
317}
318int usage_lf_em4x50_write(void) {
319 PrintAndLog("Write EM 4x50/4x69. Tag must be on antenna. ");
320 PrintAndLog("");
321 PrintAndLog("Usage: lf em 4x50write [h] <address> <data> <pwd>");
322 PrintAndLog("Options:");
323 PrintAndLog(" h - this help");
324 PrintAndLog(" address - memory address to write to. (0-15)");
325 PrintAndLog(" data - data to write (hex)");
326 PrintAndLog(" pwd - password (hex) (optional)");
327 PrintAndLog("samples:");
328 PrintAndLog(" lf em 4x50write 1 deadc0de");
329 PrintAndLog(" lf em 4x50write 1 deadc0de 11223344");
330 return 0;
331}
332
23f0a7d8 333uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)
334{
335 if (size<45) return 0;
cb1ba30a 336
23f0a7d8 337 uint32_t code = bytebits_to_byte(BitStream,8);
338 code = code<<8 | bytebits_to_byte(BitStream+9,8);
339 code = code<<8 | bytebits_to_byte(BitStream+18,8);
340 code = code<<8 | bytebits_to_byte(BitStream+27,8);
cb1ba30a 341
23f0a7d8 342 if (verbose || g_debugMode){
343 for (uint8_t i = 0; i<5; i++){
cc15a118 344 if (i == 4) PrintAndLog(""); //parity byte spacer
23f0a7d8 345 PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x",
346 BitStream[i*9],
347 BitStream[i*9+1],
348 BitStream[i*9+2],
349 BitStream[i*9+3],
350 BitStream[i*9+4],
351 BitStream[i*9+5],
352 BitStream[i*9+6],
353 BitStream[i*9+7],
354 BitStream[i*9+8],
355 bytebits_to_byte(BitStream+i*9,8)
356 );
357 }
358 if (pTest)
359 PrintAndLog("Parity Passed");
360 else
361 PrintAndLog("Parity Failed");
362 }
23f0a7d8 363 return code;
364}
4ac9f078 365
366
ff9c043d 367/* Read the transmitted data of an EM4x50 tag from the graphbuffer
7fe9b0b7 368 * Format:
369 *
370 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
371 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
372 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
373 * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
374 * CCCCCCCC <- column parity bits
375 * 0 <- stop bit
376 * LW <- Listen Window
377 *
378 * This pattern repeats for every block of data being transmitted.
379 * Transmission starts with two Listen Windows (LW - a modulated
380 * pattern of 320 cycles each (32/32/128/64/64)).
381 *
382 * Note that this data may or may not be the UID. It is whatever data
383 * is stored in the blocks defined in the control word First and Last
384 * Word Read values. UID is stored in block 32.
385 */
cc15a118 386 //completed by Marshmellow
4ac9f078 387int EM4x50Read(const char *Cmd, bool verbose) {
cc15a118 388 uint8_t fndClk[] = {8,16,32,40,50,64,128};
23f0a7d8 389 int clk = 0;
390 int invert = 0;
23f0a7d8 391 int tol = 0;
392 int i, j, startblock, skip, block, start, end, low, high, minClk;
cc15a118 393 bool complete = false;
23f0a7d8 394 int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
23f0a7d8 395 uint32_t Code[6];
396 char tmp[6];
23f0a7d8 397 char tmp2[20];
49bbc60a 398 int phaseoff;
cc15a118 399 high = low = 0;
23f0a7d8 400 memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
cc15a118 401
402 // get user entry if any
403 sscanf(Cmd, "%i %i", &clk, &invert);
404
405 // save GraphBuffer - to restore it later
406 save_restoreGB(1);
407
23f0a7d8 408 // first get high and low values
cc15a118 409 for (i = 0; i < GraphTraceLen; i++) {
23f0a7d8 410 if (GraphBuffer[i] > high)
411 high = GraphBuffer[i];
412 else if (GraphBuffer[i] < low)
413 low = GraphBuffer[i];
414 }
415
cc15a118 416 i = 0;
417 j = 0;
418 minClk = 255;
419 // get to first full low to prime loop and skip incomplete first pulse
420 while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
421 ++i;
422 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
423 ++i;
424 skip = i;
425
426 // populate tmpbuff buffer with pulse lengths
427 while (i < GraphTraceLen) {
23f0a7d8 428 // measure from low to low
cc15a118 429 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
23f0a7d8 430 ++i;
431 start= i;
cc15a118 432 while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
23f0a7d8 433 ++i;
cc15a118 434 while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
23f0a7d8 435 ++i;
436 if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
437 break;
438 }
439 tmpbuff[j++]= i - start;
cc15a118 440 if (i-start < minClk && i < GraphTraceLen) {
441 minClk = i - start;
442 }
23f0a7d8 443 }
444 // set clock
cc15a118 445 if (!clk) {
23f0a7d8 446 for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
447 tol = fndClk[clkCnt]/8;
cc15a118 448 if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) {
23f0a7d8 449 clk=fndClk[clkCnt];
450 break;
451 }
452 }
cb1ba30a 453 if (!clk) {
454 PrintAndLog("ERROR: EM4x50 - didn't find a clock");
455 return 0;
456 }
6e984446 457 } else tol = clk/8;
23f0a7d8 458
459 // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2)
cc15a118 460 start = -1;
461 for (i= 0; i < j - 4 ; ++i) {
23f0a7d8 462 skip += tmpbuff[i];
cc15a118 463 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks
464 if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks
465 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
466 if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following
23f0a7d8 467 {
468 start= i + 4;
469 break;
470 }
471 }
cc15a118 472 startblock = i + 4;
23f0a7d8 473
474 // skip over the remainder of LW
49bbc60a 475 skip += tmpbuff[i+1] + tmpbuff[i+2] + clk;
476 if (tmpbuff[i+3]>clk)
477 phaseoff = tmpbuff[i+3]-clk;
478 else
479 phaseoff = 0;
23f0a7d8 480 // now do it again to find the end
481 end = skip;
cc15a118 482 for (i += 3; i < j - 4 ; ++i) {
23f0a7d8 483 end += tmpbuff[i];
cc15a118 484 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks
485 if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks
486 if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
487 if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following
23f0a7d8 488 {
489 complete= true;
490 break;
491 }
492 }
493 end = i;
494 // report back
495 if (verbose || g_debugMode) {
496 if (start >= 0) {
cc15a118 497 PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)");
23f0a7d8 498 } else {
cc15a118 499 PrintAndLog("No data found!, clock tried:%d",clk);
23f0a7d8 500 PrintAndLog("Try again with more samples.");
cc15a118 501 PrintAndLog(" or after a 'data askedge' command to clean up the read");
23f0a7d8 502 return 0;
503 }
23f0a7d8 504 } else if (start < 0) return 0;
cc15a118 505 start = skip;
23f0a7d8 506 snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47);
507 // get rid of leading crap
cc15a118 508 snprintf(tmp, sizeof(tmp), "%i", skip);
23f0a7d8 509 CmdLtrim(tmp);
510 bool pTest;
cc15a118 511 bool AllPTest = true;
23f0a7d8 512 // now work through remaining buffer printing out data blocks
513 block = 0;
514 i = startblock;
cc15a118 515 while (block < 6) {
23f0a7d8 516 if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block);
517 skip = phaseoff;
518
519 // look for LW before start of next block
cc15a118 520 for ( ; i < j - 4 ; ++i) {
23f0a7d8 521 skip += tmpbuff[i];
522 if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)
523 if (tmpbuff[i+1] >= clk-tol)
524 break;
525 }
49bbc60a 526 if (i >= j-4) break; //next LW not found
23f0a7d8 527 skip += clk;
49bbc60a 528 if (tmpbuff[i+1]>clk)
529 phaseoff = tmpbuff[i+1]-clk;
530 else
531 phaseoff = 0;
23f0a7d8 532 i += 2;
fef74fdc 533 if (ASKDemod(tmp2, false, false, 1) < 1) {
cc15a118 534 save_restoreGB(0);
535 return 0;
536 }
23f0a7d8 537 //set DemodBufferLen to just one block
538 DemodBufferLen = skip/clk;
539 //test parities
540 pTest = EM_ByteParityTest(DemodBuffer,DemodBufferLen,5,9,0);
541 pTest &= EM_EndParityTest(DemodBuffer,DemodBufferLen,5,9,0);
542 AllPTest &= pTest;
543 //get output
cc15a118 544 Code[block] = OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest);
545 if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d", skip, skip/clk);
23f0a7d8 546 //skip to start of next block
547 snprintf(tmp,sizeof(tmp),"%i",skip);
548 CmdLtrim(tmp);
549 block++;
cc15a118 550 if (i >= end) break; //in case chip doesn't output 6 blocks
23f0a7d8 551 }
552 //print full code:
553 if (verbose || g_debugMode || AllPTest){
49bbc60a 554 if (!complete) {
555 PrintAndLog("*** Warning!");
556 PrintAndLog("Partial data - no end found!");
557 PrintAndLog("Try again with more samples.");
558 }
cc15a118 559 PrintAndLog("Found data at sample: %i - using clock: %i", start, clk);
560 end = block;
561 for (block=0; block < end; block++){
23f0a7d8 562 PrintAndLog("Block %d: %08x",block,Code[block]);
563 }
49bbc60a 564 if (AllPTest) {
23f0a7d8 565 PrintAndLog("Parities Passed");
49bbc60a 566 } else {
23f0a7d8 567 PrintAndLog("Parities Failed");
cc15a118 568 PrintAndLog("Try cleaning the read samples with 'data askedge'");
49bbc60a 569 }
23f0a7d8 570 }
571
572 //restore GraphBuffer
573 save_restoreGB(0);
574 return (int)AllPTest;
575}
576
cb1ba30a 577int CmdEM4x50Read(const char *Cmd) {
4ac9f078 578 uint8_t ctmp = param_getchar(Cmd, 0);
579 if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_read();
23f0a7d8 580 return EM4x50Read(Cmd, true);
2d4eae76 581}
4ac9f078 582int CmdEM4x50Write(const char *Cmd){
583 uint8_t ctmp = param_getchar(Cmd, 0);
584 if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_write();
585 PrintAndLog("no implemented yet");
23f0a7d8 586 return 0;
54a942b0 587}
4ac9f078 588int CmdEM4x50Dump(const char *Cmd){
589 uint8_t ctmp = param_getchar(Cmd, 0);
590 if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_dump();
591 PrintAndLog("no implemented yet");
516dbac2 592 return 0;
593}
594
595#define EM_PREAMBLE_LEN 6
596// download samples from device
597// and copy them to Graphbuffer
598bool downloadSamplesEM(){
599
600 // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples)
601 uint8_t got[6000];
602 GetFromBigBuf(got, sizeof(got), 0);
603 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) {
604 PrintAndLog("command execution time out");
605 return FALSE;
606 }
607 setGraphBuf(got, sizeof(got));
608 return TRUE;
609}
f9f5f450 610//search for given preamble in given BitStream and return success=1 or fail=0 and startIndex
516dbac2 611bool doPreambleSearch(size_t *startIdx){
612
613 // sanity check
6f931855 614 if ( DemodBufferLen < EM_PREAMBLE_LEN) {
615 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 demodbuffer too small");
516dbac2 616 return FALSE;
6f931855 617 }
516dbac2 618
619 // skip first two 0 bits as they might have been missed in the demod
620 uint8_t preamble[EM_PREAMBLE_LEN] = {0,0,1,0,1,0};
621
4ac9f078 622 // set size to 15 to only test first 4 positions for the preamble
623 size_t size = (15 > DemodBufferLen) ? DemodBufferLen : 15;
516dbac2 624 *startIdx = 0;
625 uint8_t found = 0;
bd09006a 626
f9f5f450 627 // em only sends preamble once, so look for it once in the first x bits
516dbac2 628 for (int idx = 0; idx < size - EM_PREAMBLE_LEN; idx++){
629 if (memcmp(DemodBuffer+idx, preamble, EM_PREAMBLE_LEN) == 0){
f9f5f450 630 //first index found
516dbac2 631 *startIdx = idx;
632 found = 1;
633 break;
f9f5f450 634 }
635 }
516dbac2 636
637 if ( !found) {
638 if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", *startIdx);
639 return FALSE;
640 }
516dbac2 641 return TRUE;
f9f5f450 642}
643
bd09006a 644bool detectFSK(){
645 // detect fsk clock
646 if (!GetFskClock("", FALSE, FALSE)) {
4ac9f078 647 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK clock failed");
bd09006a 648 return FALSE;
f9f5f450 649 }
bd09006a 650 // demod
651 int ans = FSKrawDemod("0 0", FALSE);
652 if (!ans) {
4ac9f078 653 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK Demod failed");
bd09006a 654 return FALSE;
62dc7d4a 655 }
bd09006a 656 return TRUE;
657}
658// PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... )
659bool detectPSK(){
660 int ans = GetPskClock("", FALSE, FALSE);
6f931855 661 if (ans <= 0) {
4ac9f078 662 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK clock failed");
bd09006a 663 return FALSE;
664 }
4ac9f078 665 //demod
666 //try psk1 -- 0 0 6 (six errors?!?)
667 ans = PSKDemod("0 0 6", FALSE);
668 if (!ans) {
669 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 Demod failed");
670
671 //try psk1 inverted
672 ans = PSKDemod("0 1 6", FALSE);
673 if (!ans) {
674 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 inverted Demod failed");
675 return FALSE;
676 }
677 }
678 // either PSK1 or PSK1 inverted is ok from here.
679 // lets check PSK2 later.
bd09006a 680 return TRUE;
681}
682// try manchester - NOTE: ST only applies to T55x7 tags.
683bool detectASK_MAN(){
684 bool stcheck = FALSE;
6f931855 685 int ans = ASKDemod_ext("0 0 0", FALSE, FALSE, 1, &stcheck);
bd09006a 686 if (!ans) {
4ac9f078 687 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/Manchester Demod failed");
bd09006a 688 return FALSE;
689 }
690 return TRUE;
691}
692bool detectASK_BI(){
693 int ans = ASKbiphaseDemod("0 0 1", FALSE);
694 if (!ans) {
4ac9f078 695 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/biphase normal demod failed");
bd09006a 696
697 ans = ASKbiphaseDemod("0 1 1", FALSE);
62dc7d4a 698 if (!ans) {
4ac9f078 699 if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/biphase inverted demod failed");
bd09006a 700 return FALSE;
62dc7d4a 701 }
702 }
bd09006a 703 return TRUE;
704}
f9f5f450 705
516dbac2 706// param: idx - start index in demoded data.
4ac9f078 707bool setDemodBufferEM(uint32_t *word, size_t idx){
708
709 //test for even parity bits.
9932c55a 710 uint8_t parity[45] = {0};
17a9ca0c 711 memcpy( parity, DemodBuffer, 45);
9932c55a 712 if (!EMwordparitytest(parity) ){
713 PrintAndLog("DEBUG: Error - EM Parity tests failed");
714 return FALSE;
715 }
716
4ac9f078 717 size_t size = removeParity(DemodBuffer, idx + EM_PREAMBLE_LEN, 9, 0, 44);
718 if (!size) {
9932c55a 719 if (g_debugMode) PrintAndLog("DEBUG: Error - EM Parity not detected");
4ac9f078 720 return FALSE;
516dbac2 721 }
9932c55a 722 // set & copy to output
4ac9f078 723 setDemodBuf(DemodBuffer, 40, 0);
4ac9f078 724 *word = bytebits_to_byteLSBF(DemodBuffer, 32);
9932c55a 725 return TRUE;
bd09006a 726}
f9f5f450 727
bd09006a 728// FSK, PSK, ASK/MANCHESTER, ASK/BIPHASE, ASK/DIPHASE
729// should cover 90% of known used configs
730// the rest will need to be manually demoded for now...
4ac9f078 731bool demodEM4x05resp(uint32_t *word) {
732 size_t idx = 0;
733
734 if (detectASK_MAN() && doPreambleSearch( &idx ))
735 return setDemodBufferEM(word, idx);
bd09006a 736
4ac9f078 737 if (detectASK_BI() && doPreambleSearch( &idx ))
738 return setDemodBufferEM(word, idx);
bd09006a 739
4ac9f078 740 if (detectFSK() && doPreambleSearch( &idx ))
741 return setDemodBufferEM(word, idx);
bd09006a 742
4ac9f078 743 if (detectPSK()) {
744 if (doPreambleSearch( &idx ))
745 return setDemodBufferEM(word, idx);
746
747 psk1TOpsk2(DemodBuffer, DemodBufferLen);
748 if (doPreambleSearch( &idx ))
749 return setDemodBufferEM(word, idx);
750 }
751 return FALSE;
752}
753
754//////////////// 4205 / 4305 commands
755int usage_lf_em4x05_dump(void) {
756 PrintAndLog("Dump EM4x05/EM4x69. Tag must be on antenna. ");
757 PrintAndLog("");
758 PrintAndLog("Usage: lf em 4x05dump [h] <pwd>");
759 PrintAndLog("Options:");
760 PrintAndLog(" h - this help");
761 PrintAndLog(" pwd - password (hex) (optional)");
762 PrintAndLog("samples:");
763 PrintAndLog(" lf em 4x05dump");
764 PrintAndLog(" lf em 4x05dump 11223344");
765 return 0;
766}
767int usage_lf_em4x05_read(void) {
768 PrintAndLog("Read EM4x05/EM4x69. Tag must be on antenna. ");
769 PrintAndLog("");
770 PrintAndLog("Usage: lf em 4x05read [h] <address> <pwd>");
771 PrintAndLog("Options:");
772 PrintAndLog(" h - this help");
773 PrintAndLog(" address - memory address to read. (0-15)");
774 PrintAndLog(" pwd - password (hex) (optional)");
775 PrintAndLog("samples:");
776 PrintAndLog(" lf em 4x05read 1");
777 PrintAndLog(" lf em 4x05read 1 11223344");
778 return 0;
779}
780int usage_lf_em4x05_write(void) {
781 PrintAndLog("Write EM4x05/4x69. Tag must be on antenna. ");
782 PrintAndLog("");
783 PrintAndLog("Usage: lf em 4x05write [h] <address> <data> <pwd>");
784 PrintAndLog("Options:");
785 PrintAndLog(" h - this help");
786 PrintAndLog(" address - memory address to write to. (0-15)");
787 PrintAndLog(" data - data to write (hex)");
788 PrintAndLog(" pwd - password (hex) (optional)");
789 PrintAndLog("samples:");
790 PrintAndLog(" lf em 4x05write 1 deadc0de");
791 PrintAndLog(" lf em 4x05write 1 deadc0de 11223344");
792 return 0;
793}
794
795int CmdEM4x05Dump(const char *Cmd) {
796 uint8_t addr = 0;
9932c55a 797 uint32_t pwd = 0;
4ac9f078 798 bool usePwd = false;
799 uint8_t ctmp = param_getchar(Cmd, 0);
800 if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_dump();
801
802 // for now use default input of 1 as invalid (unlikely 1 will be a valid password...)
803 pwd = param_get32ex(Cmd, 0, 1, 16);
bd09006a 804
5e9d59fe 805 if ( pwd != 1 )
4ac9f078 806 usePwd = true;
5e9d59fe 807
4ac9f078 808 int success = 1;
9932c55a 809 PrintAndLog("Addr | data | ascii");
810 PrintAndLog("-----+--------+------");
4ac9f078 811 for (; addr < 16; addr++) {
812 if (addr == 2) {
813 if (usePwd) {
9932c55a 814 PrintAndLog(" %02u | %08X", addr, pwd);
4ac9f078 815 } else {
9932c55a 816 PrintAndLog(" 02 | cannot read");
4ac9f078 817 }
818 } else {
819 //success &= EM4x05Read(addr, pwd, usePwd);
820 }
821 }
080e1114 822
4ac9f078 823 return success;
f9f5f450 824}
5e9d59fe 825//ICEMAN; mentalnote to self: -1 is not doable for uint32_t..
4ac9f078 826int CmdEM4x05Read(const char *Cmd) {
cb1ba30a 827 int addr, pwd;
828 bool usePwd = false;
829 uint8_t ctmp = param_getchar(Cmd, 0);
4ac9f078 830 if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_read();
cb1ba30a 831
832 addr = param_get8ex(Cmd, 0, -1, 10);
833 pwd = param_get32ex(Cmd, 1, -1, 16);
23f0a7d8 834
cb1ba30a 835 if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
836 PrintAndLog("Address must be between 0 and 15");
23f0a7d8 837 return 1;
838 }
cb1ba30a 839 if ( pwd == -1 )
840 PrintAndLog("Reading address %d", addr);
841 else {
842 usePwd = true;
843 PrintAndLog("Reading address %d | password %08X", addr, pwd);
844 }
23f0a7d8 845
cb1ba30a 846 UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}};
847 clearCommandBuffer();
23f0a7d8 848 SendCommand(&c);
cb1ba30a 849 UsbCommand resp;
850 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)){
851 PrintAndLog("Command timed out");
852 return -1;
23f0a7d8 853 }
516dbac2 854
855 if (!downloadSamplesEM())
ff9c043d 856 return -1;
516dbac2 857
f9f5f450 858 int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000;
859 if (graphJustNoise(GraphBuffer, testLen)) {
516dbac2 860 PrintAndLog("Tag not found");
ff9c043d 861 return -1;
862 }
863
4ac9f078 864 //attempt demod
865 uint32_t word = 0;
866 int isOk = demodEM4x05resp(&word);
867 if (isOk)
868 PrintAndLog("Got Address %02d | %08X",addr, word);
869 else
080e1114 870 PrintAndLog("Read failed");
871
4ac9f078 872 return isOk;
54a942b0 873}
874
4ac9f078 875int CmdEM4x05Write(const char *Cmd) {
cb1ba30a 876 uint8_t ctmp = param_getchar(Cmd, 0);
4ac9f078 877 if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_write();
cb1ba30a 878
516dbac2 879 bool usePwd = false;
cb1ba30a 880 int addr = 16; // default to invalid address
881 int data = 0xFFFFFFFF; // default to blank data
882 int pwd = 0xFFFFFFFF; // default to blank password
883
884 addr = param_get8ex(Cmd, 0, -1, 10);
885 data = param_get32ex(Cmd, 1, -1, 16);
886 pwd = param_get32ex(Cmd, 2, -1, 16);
23f0a7d8 887
cb1ba30a 888 if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
889 PrintAndLog("Address must be between 0 and 15");
23f0a7d8 890 return 1;
891 }
cb1ba30a 892 if ( pwd == -1 )
893 PrintAndLog("Writing address %d data %08X", addr, data);
894 else {
895 usePwd = true;
896 PrintAndLog("Writing address %d data %08X using password %08X", addr, data, pwd);
897 }
23f0a7d8 898
cb1ba30a 899 uint16_t flag = (addr << 8 ) | usePwd;
23f0a7d8 900
cb1ba30a 901 UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}};
902 clearCommandBuffer();
23f0a7d8 903 SendCommand(&c);
cb1ba30a 904 UsbCommand resp;
4ac9f078 905 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)){
cb1ba30a 906 PrintAndLog("Error occurred, device did not respond during write operation.");
907 return -1;
908 }
ff9c043d 909
516dbac2 910 if (!downloadSamplesEM())
911 return -1;
912
62dc7d4a 913 //todo: check response for 00001010 then write data for write confirmation!
ff9c043d 914
62dc7d4a 915 //attempt demod:
916 //need 0 bits demoded (after preamble) to verify write cmd
4ac9f078 917 uint32_t dummy = 0;
918 int isOk = demodEM4x05resp(&dummy);
919 if (isOk)
62dc7d4a 920 PrintAndLog("Write Verified");
516dbac2 921
4ac9f078 922 return isOk;
54a942b0 923}
924
cb1ba30a 925static command_t CommandTable[] = {
926 {"help", CmdHelp, 1, "This help"},
4ac9f078 927 {"410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
928 {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"},
929 {"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
930 {"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
931 {"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
932 {"410xwrite", CmdEM410xWrite, 0, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
933 {"4x05read", CmdEM4x05Read, 0, "read word data from EM4205/4305"},
934 {"4x05write", CmdEM4x05Write, 0, "write word data to EM4205/4305"},
935 {"4x05dump", CmdEM4x05Dump, 0, "dump EM4205/4305 tag"},
936 {"4x50read", CmdEM4x50Read, 0, "read word data from EM4x50"},
937 {"4x50write", CmdEM4x50Write, 0, "write word data to EM4x50"},
938 {"4x50dump", CmdEM4x50Dump, 0, "dump EM4x50 tag"},
23f0a7d8 939 {NULL, NULL, 0, NULL}
7fe9b0b7 940};
941
4c36581b 942int CmdLFEM4X(const char *Cmd) {
943 clearCommandBuffer();
23f0a7d8 944 CmdsParse(CommandTable, Cmd);
945 return 0;
7fe9b0b7 946}
947
4c36581b 948int CmdHelp(const char *Cmd) {
23f0a7d8 949 CmdsHelp(CommandTable);
950 return 0;
7fe9b0b7 951}
Impressum, Datenschutz