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CHG: "hf legic write" got a make over in how its called. Now called with 'offset...
[proxmark3-svn] / client / cmdhflegic.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 // High frequency Legic commands
9 //-----------------------------------------------------------------------------
10 #include "cmdhflegic.h"
11
12 static int CmdHelp(const char *Cmd);
13
14 #define MAX_LENGTH 1024
15
16 int usage_legic_calccrc(void){
17 PrintAndLog("Calculates the legic crc8/crc16 on the input hexbytes.");
18 PrintAndLog("There must be an even number of hexsymbols as input.");
19 PrintAndLog("Usage: hf legic crc [h] b <hexbytes> u <uidcrc> c <crc type>");
20 PrintAndLog("Options:");
21 PrintAndLog(" h : this help");
22 PrintAndLog(" b <hexbytes> : hex bytes");
23 PrintAndLog(" u <uidcrc> : MCC hexbyte");
24 PrintAndLog(" c <crc type> : 8|16 bit crc size");
25 PrintAndLog("");
26 PrintAndLog("Samples:");
27 PrintAndLog(" hf legic crc b deadbeef1122");
28 PrintAndLog(" hf legic crc b deadbeef1122 u 9A c 16");
29 return 0;
30 }
31 int usage_legic_load(void){
32 PrintAndLog("It loads datasamples from the file `filename` to device memory");
33 PrintAndLog("Usage: hf legic load [h] <file name>");
34 PrintAndLog("Options:");
35 PrintAndLog(" h : this help");
36 PrintAndLog(" <filename> : Name of file to load");
37 PrintAndLog("");
38 PrintAndLog("Samples:");
39 PrintAndLog(" hf legic load filename");
40 return 0;
41 }
42 int usage_legic_rdmem(void){
43 PrintAndLog("Read data from a legic tag.");
44 PrintAndLog("Usage: hf legic rdmem [h] <offset> <length> <IV>");
45 PrintAndLog("Options:");
46 PrintAndLog(" h : this help");
47 PrintAndLog(" <offset> : offset in data array to start download from (hex)");
48 PrintAndLog(" <length> : number of bytes to read (hex)");
49 PrintAndLog(" <IV> : (optional) Initialization vector to use (hex, odd and 7bits)");
50 PrintAndLog("");
51 PrintAndLog("Samples:");
52 PrintAndLog(" hf legic rdmem 0 21 - reads from byte[0] 21 bytes(system header)");
53 PrintAndLog(" hf legic rdmem 0 4 55 - reads from byte[0] 4 bytes with IV 0x55");
54 PrintAndLog(" hf legic rdmem 0 100 55 - reads 256bytes with IV 0x55");
55 return 0;
56 }
57 int usage_legic_sim(void){
58 PrintAndLog("Missing help text.");
59 return 0;
60 }
61 int usage_legic_write(void){
62 PrintAndLog(" Write sample buffer to a legic tag. (use after load or read)");
63 PrintAndLog("Usage: hf legic write [h] o <offset> d <data (hex symbols)>");
64 PrintAndLog("Options:");
65 PrintAndLog(" h : this help");
66 PrintAndLog(" o <offset> : offset in data array to start writing");
67 //PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
68 PrintAndLog(" d <data> : bytes to write (hex symbols)");
69 PrintAndLog("");
70 PrintAndLog("Samples:");
71 PrintAndLog(" hf legic write o 10 d 11223344 - Write 0x11223344 starting from offset 0x10");
72 return 0;
73 }
74 int usage_legic_reader(void){
75 PrintAndLog("Read UID and type information from a legic tag.");
76 PrintAndLog("Usage: hf legic reader [h]");
77 PrintAndLog("Options:");
78 PrintAndLog(" h : this help");
79 PrintAndLog("");
80 PrintAndLog("Samples:");
81 PrintAndLog(" hf legic reader");
82 return 0;
83 }
84 int usage_legic_info(void){
85 PrintAndLog("Reads information from a legic prime tag.");
86 PrintAndLog("Shows systemarea, user areas etc");
87 PrintAndLog("Usage: hf legic info [h]");
88 PrintAndLog("Options:");
89 PrintAndLog(" h : this help");
90 PrintAndLog("");
91 PrintAndLog("Samples:");
92 PrintAndLog(" hf legic info");
93 return 0;
94 }
95 int usage_legic_dump(void){
96 PrintAndLog("Reads all pages from LEGIC MIM22, MIM256, MIM1024");
97 PrintAndLog("and saves binary dump into the file `filename.bin` or `cardUID.bin`");
98 PrintAndLog("It autodetects card type.\n");
99 PrintAndLog("Usage: hf legic dump [h] o <filename w/o .bin>");
100 PrintAndLog("Options:");
101 PrintAndLog(" h : this help");
102 PrintAndLog(" n <FN> : filename w/o .bin to save the dump as");
103 PrintAndLog("");
104 PrintAndLog("Samples:");
105 PrintAndLog(" hf legic dump");
106 PrintAndLog(" hf legic dump o myfile");
107 return 0;
108 }
109 int usage_legic_eload(void){
110 PrintAndLog("It loads binary dump from the file `filename.bin`");
111 PrintAndLog("Usage: hf legic eload [h] [card memory] <file name w/o `.bin`>");
112 PrintAndLog("Options:");
113 PrintAndLog(" h : this help");
114 PrintAndLog(" [card memory] : 0 = MIM22");
115 PrintAndLog(" : 1 = MIM256 (default)");
116 PrintAndLog(" : 2 = MIM1024");
117 PrintAndLog(" <filename> : filename w/o .bin to load");
118 PrintAndLog("");
119 PrintAndLog("Samples:");
120 PrintAndLog(" hf legic eload filename");
121 PrintAndLog(" hf legic eload 2 filename");
122 return 0;
123 }
124 int usage_legic_esave(void){
125 PrintAndLog("It saves binary dump into the file `filename.bin` or `cardID.bin`");
126 PrintAndLog(" Usage: hf legic esave [h] [card memory] [file name w/o `.bin`]");
127 PrintAndLog("Options:");
128 PrintAndLog(" h : this help");
129 PrintAndLog(" [card memory] : 0 = MIM22");
130 PrintAndLog(" : 1 = MIM256 (default)");
131 PrintAndLog(" : 2 = MIM1024");
132 PrintAndLog(" <filename> : filename w/o .bin to load");
133 PrintAndLog("");
134 PrintAndLog("Samples:");
135 PrintAndLog(" hf legic esave ");
136 PrintAndLog(" hf legic esave 2");
137 PrintAndLog(" hf legic esave 2 filename");
138 return 0;
139 }
140
141 /*
142 * Output BigBuf and deobfuscate LEGIC RF tag data.
143 * This is based on information given in the talk held
144 * by Henryk Ploetz and Karsten Nohl at 26c3
145 */
146 int CmdLegicInfo(const char *Cmd) {
147
148 char cmdp = param_getchar(Cmd, 0);
149 if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_info();
150
151 int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0;
152 int crc = 0, wrp = 0, wrc = 0;
153 uint8_t stamp_len = 0;
154 uint8_t data[1024]; // receiver buffer
155 char token_type[5] = {0,0,0,0,0};
156 int dcf = 0;
157 int bIsSegmented = 0;
158
159 CmdLegicRdmem("0 22 55");
160
161 // copy data from device
162 GetEMLFromBigBuf(data, sizeof(data), 0);
163 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
164 PrintAndLog("Command execute timeout");
165 return 1;
166 }
167
168 // Output CDF System area (9 bytes) plus remaining header area (12 bytes)
169 crc = data[4];
170 uint32_t calc_crc = CRC8Legic(data, 4);
171
172 PrintAndLog("\nCDF: System Area");
173 PrintAndLog("------------------------------------------------------");
174 PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s",
175 data[0],
176 data[1],
177 data[2],
178 data[3],
179 data[4],
180 (calc_crc == crc) ? "OK":"Fail"
181 );
182
183 // MCD = Manufacturer ID (should be list meaning something?)
184
185 token_type[0] = 0;
186 dcf = ((int)data[6] << 8) | (int)data[5];
187
188 // New unwritten media?
189 if(dcf == 0xFFFF) {
190
191 PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)",
192 dcf,
193 data[5],
194 data[6]
195 );
196
197 } else if(dcf > 60000) { // Master token?
198
199 int fl = 0;
200
201 if(data[6] == 0xec) {
202 strncpy(token_type, "XAM", sizeof(token_type));
203 fl = 1;
204 stamp_len = 0x0c - (data[5] >> 4);
205 } else {
206 switch (data[5] & 0x7f) {
207 case 0x00 ... 0x2f:
208 strncpy(token_type, "IAM", sizeof(token_type));
209 fl = (0x2f - (data[5] & 0x7f)) + 1;
210 break;
211 case 0x30 ... 0x6f:
212 strncpy(token_type, "SAM", sizeof(token_type));
213 fl = (0x6f - (data[5] & 0x7f)) + 1;
214 break;
215 case 0x70 ... 0x7f:
216 strncpy(token_type, "GAM", sizeof(token_type));
217 fl = (0x7f - (data[5] & 0x7f)) + 1;
218 break;
219 }
220
221 stamp_len = 0xfc - data[6];
222 }
223
224 PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u",
225 dcf,
226 data[5],
227 data[6],
228 token_type,
229 (data[5] & 0x80 )>> 7,
230 stamp_len,
231 fl
232 );
233
234 } else { // Is IM(-S) type of card...
235
236 if(data[7] == 0x9F && data[8] == 0xFF) {
237 bIsSegmented = 1;
238 strncpy(token_type, "IM-S", sizeof(token_type));
239 } else {
240 strncpy(token_type, "IM", sizeof(token_type));
241 }
242
243 PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u)",
244 dcf,
245 data[5],
246 data[6],
247 token_type,
248 (data[5]&0x80) >> 7
249 );
250 }
251
252 // Makes no sence to show this on blank media...
253 if(dcf != 0xFFFF) {
254
255 if(bIsSegmented) {
256 PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, SSC=%02x",
257 data[7] & 0x0f,
258 (data[7] & 0x70) >> 4,
259 (data[7] & 0x80) >> 7,
260 data[8]
261 );
262 }
263
264 // Header area is only available on IM-S cards, on master tokens this data is the master token data itself
265 if(bIsSegmented || dcf > 60000) {
266 if(dcf > 60000) {
267 PrintAndLog("Master token data");
268 PrintAndLog("%s", sprint_hex(data+8, 14));
269 } else {
270 PrintAndLog("Remaining Header Area");
271 PrintAndLog("%s", sprint_hex(data+9, 13));
272 }
273 }
274 }
275
276 uint8_t segCrcBytes[8] = {0,0,0,0,0,0,0,0};
277 uint32_t segCalcCRC = 0;
278 uint32_t segCRC = 0;
279
280 // Data card?
281 if(dcf <= 60000) {
282
283 PrintAndLog("\nADF: User Area");
284 PrintAndLog("------------------------------------------------------");
285
286 if(bIsSegmented) {
287
288 // Data start point on segmented cards
289 i = 22;
290
291 // decode segments
292 for (segmentNum=1; segmentNum < 128; segmentNum++ )
293 {
294 segment_len = ((data[i+1] ^ crc) & 0x0f) * 256 + (data[i] ^ crc);
295 segment_flag = ((data[i+1] ^ crc) & 0xf0) >> 4;
296 wrp = (data[i+2] ^ crc);
297 wrc = ((data[i+3] ^ crc) & 0x70) >> 4;
298
299 bool hasWRC = (wrc > 0);
300 bool hasWRP = (wrp > wrc);
301 int wrp_len = (wrp - wrc);
302 int remain_seg_payload_len = (segment_len - wrp - 5);
303
304 // validate segment-crc
305 segCrcBytes[0]=data[0]; //uid0
306 segCrcBytes[1]=data[1]; //uid1
307 segCrcBytes[2]=data[2]; //uid2
308 segCrcBytes[3]=data[3]; //uid3
309 segCrcBytes[4]=(data[i] ^ crc); //hdr0
310 segCrcBytes[5]=(data[i+1] ^ crc); //hdr1
311 segCrcBytes[6]=(data[i+2] ^ crc); //hdr2
312 segCrcBytes[7]=(data[i+3] ^ crc); //hdr3
313
314 segCalcCRC = CRC8Legic(segCrcBytes, 8);
315 segCRC = data[i+4] ^ crc;
316
317 PrintAndLog("Segment %02u \nraw header | 0x%02X 0x%02X 0x%02X 0x%02X \nSegment len: %u, Flag: 0x%X (valid:%01u, last:%01u), WRP: %02u, WRC: %02u, RD: %01u, CRC: 0x%02X (%s)",
318 segmentNum,
319 data[i] ^ crc,
320 data[i+1] ^ crc,
321 data[i+2] ^ crc,
322 data[i+3] ^ crc,
323 segment_len,
324 segment_flag,
325 (segment_flag & 0x4) >> 2,
326 (segment_flag & 0x8) >> 3,
327 wrp,
328 wrc,
329 ((data[i+3]^crc) & 0x80) >> 7,
330 segCRC,
331 ( segCRC == segCalcCRC ) ? "OK" : "fail"
332 );
333
334 i += 5;
335
336 if ( hasWRC ) {
337 PrintAndLog("WRC protected area: (I %d | K %d| WRC %d)", i, k, wrc);
338 PrintAndLog("\nrow | data");
339 PrintAndLog("-----+------------------------------------------------");
340
341 for ( k=i; k < (i + wrc); ++k)
342 data[k] ^= crc;
343
344 print_hex_break( data+i, wrc, 16);
345
346 i += wrc;
347 }
348
349 if ( hasWRP ) {
350 PrintAndLog("Remaining write protected area: (I %d | K %d | WRC %d | WRP %d WRP_LEN %d)",i, k, wrc, wrp, wrp_len);
351 PrintAndLog("\nrow | data");
352 PrintAndLog("-----+------------------------------------------------");
353
354 for (k=i; k < (i+wrp_len); ++k)
355 data[k] ^= crc;
356
357 print_hex_break( data+i, wrp_len, 16);
358
359 i += wrp_len;
360
361 // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...)
362 if( wrp_len == 8 )
363 PrintAndLog("Card ID: %2X%02X%02X", data[i-4]^crc, data[i-3]^crc, data[i-2]^crc);
364 }
365
366 PrintAndLog("Remaining segment payload: (I %d | K %d | Remain LEN %d)", i, k, remain_seg_payload_len);
367 PrintAndLog("\nrow | data");
368 PrintAndLog("-----+------------------------------------------------");
369
370 for ( k=i; k < (i+remain_seg_payload_len); ++k)
371 data[k] ^= crc;
372
373 print_hex_break( data+i, remain_seg_payload_len, 16);
374
375 i += remain_seg_payload_len;
376
377 PrintAndLog("-----+------------------------------------------------\n");
378
379 // end with last segment
380 if (segment_flag & 0x8) return 0;
381
382 } // end for loop
383
384 } else {
385
386 // Data start point on unsegmented cards
387 i = 8;
388
389 wrp = data[7] & 0x0F;
390 wrc = (data[7] & 0x70) >> 4;
391
392 bool hasWRC = (wrc > 0);
393 bool hasWRP = (wrp > wrc);
394 int wrp_len = (wrp - wrc);
395 int remain_seg_payload_len = (1024 - 22 - wrp); // Any chance to get physical card size here!?
396
397 PrintAndLog("Unsegmented card - WRP: %02u, WRC: %02u, RD: %01u",
398 wrp,
399 wrc,
400 (data[7] & 0x80) >> 7
401 );
402
403 if ( hasWRC ) {
404 PrintAndLog("WRC protected area: (I %d | WRC %d)", i, wrc);
405 PrintAndLog("\nrow | data");
406 PrintAndLog("-----+------------------------------------------------");
407 print_hex_break( data+i, wrc, 16);
408 i += wrc;
409 }
410
411 if ( hasWRP ) {
412 PrintAndLog("Remaining write protected area: (I %d | WRC %d | WRP %d | WRP_LEN %d)", i, wrc, wrp, wrp_len);
413 PrintAndLog("\nrow | data");
414 PrintAndLog("-----+------------------------------------------------");
415 print_hex_break( data + i, wrp_len, 16);
416 i += wrp_len;
417
418 // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...)
419 if( wrp_len == 8 )
420 PrintAndLog("Card ID: %2X%02X%02X", data[i-4], data[i-3], data[i-2]);
421 }
422
423 PrintAndLog("Remaining segment payload: (I %d | Remain LEN %d)", i, remain_seg_payload_len);
424 PrintAndLog("\nrow | data");
425 PrintAndLog("-----+------------------------------------------------");
426 print_hex_break( data + i, remain_seg_payload_len, 16);
427 i += remain_seg_payload_len;
428
429 PrintAndLog("-----+------------------------------------------------\n");
430 }
431 }
432 return 0;
433 }
434
435 // params:
436 // offset in data memory
437 // number of bytes to read
438 int CmdLegicRdmem(const char *Cmd) {
439
440 char cmdp = param_getchar(Cmd, 0);
441 if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rdmem();
442
443 uint32_t offset = 0, len = 0, IV = 1;
444 sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
445
446 // OUT-OF-BOUNDS check
447 if ( len + offset > MAX_LENGTH ) {
448 len = MAX_LENGTH - offset;
449 PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len, len);
450 }
451
452 legic_chk_iv(&IV);
453
454 UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};
455 clearCommandBuffer();
456 SendCommand(&c);
457 UsbCommand resp;
458 if ( !WaitForResponseTimeout(CMD_ACK, &resp, 3000) ) {
459 PrintAndLog("command execution time out");
460 return 1;
461 }
462
463 uint8_t isOK = resp.arg[0] & 0xFF;
464 uint16_t readlen = resp.arg[1];
465 if ( !isOK ) {
466 PrintAndLog("failed reading tag");
467 return 2;
468 }
469
470 uint8_t *data = malloc(readlen);
471 if ( !data ){
472 PrintAndLog("Cannot allocate memory");
473 return 2;
474 }
475
476 if ( readlen != len )
477 PrintAndLog("Fail, only managed to read 0x%02X bytes", readlen);
478
479 // copy data from device
480 GetEMLFromBigBuf(data, readlen, 0);
481 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)){
482 PrintAndLog("Command execute timeout");
483 free(data);
484 return 1;
485 }
486
487 PrintAndLog("\n ## | Data");
488 PrintAndLog("-----+-----");
489 print_hex_break( data, readlen, 32);
490 free(data);
491 return 0;
492 }
493
494 // load, filename (ascii hex textfile)
495 // uploads it to device mem
496 int CmdLegicLoad(const char *Cmd) {
497
498 // iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :)
499 char cmdp = param_getchar(Cmd, 0);
500 if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) return usage_legic_load();
501
502 char filename[FILE_PATH_SIZE] = {0x00};
503 int len = strlen(Cmd);
504
505 if (len > FILE_PATH_SIZE) {
506 PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE);
507 return 0;
508 }
509 memcpy(filename, Cmd, len);
510
511 FILE *f = fopen(filename, "r");
512 if(!f) {
513 PrintAndLog("couldn't open '%s'", Cmd);
514 return -1;
515 }
516
517 char line[80];
518 int offset = 0;
519 uint8_t data[USB_CMD_DATA_SIZE] = {0x00};
520 int index = 0;
521 int totalbytes = 0;
522 while ( fgets(line, sizeof(line), f) ) {
523 int res = sscanf(line, "%x %x %x %x %x %x %x %x",
524 (unsigned int *)&data[index],
525 (unsigned int *)&data[index + 1],
526 (unsigned int *)&data[index + 2],
527 (unsigned int *)&data[index + 3],
528 (unsigned int *)&data[index + 4],
529 (unsigned int *)&data[index + 5],
530 (unsigned int *)&data[index + 6],
531 (unsigned int *)&data[index + 7]);
532
533 if(res != 8) {
534 PrintAndLog("Error: could not read samples");
535 fclose(f);
536 return -1;
537 }
538 index += res;
539
540 if ( index == USB_CMD_DATA_SIZE ){
541 UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
542 memcpy(c.d.asBytes, data, sizeof(data));
543 clearCommandBuffer();
544 SendCommand(&c);
545 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
546 PrintAndLog("Command execute timeout");
547 fclose(f);
548 return 1;
549 }
550 offset += index;
551 totalbytes += index;
552 index = 0;
553 }
554 }
555 fclose(f);
556
557 // left over bytes?
558 if ( index != 0 ) {
559 UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
560 memcpy(c.d.asBytes, data, 8);
561 clearCommandBuffer();
562 SendCommand(&c);
563 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
564 PrintAndLog("Command execute timeout");
565 return 1;
566 }
567 totalbytes += index;
568 }
569
570 PrintAndLog("loaded %u samples", totalbytes);
571 return 0;
572 }
573
574 // Save, filename, num of bytes, starting offset. (in decimal)
575 // ie: "hf legic save nnn.txt 100 0 (saves the first 100bytes)
576 // (ascii hex textfile)
577 int CmdLegicSave(const char *Cmd) {
578 int requested = 1024;
579 int offset = 0;
580 int delivered = 0;
581 char filename[FILE_PATH_SIZE] = {0x00};
582 uint8_t got[1024] = {0x00};
583
584 memset(filename, 0, FILE_PATH_SIZE);
585
586 sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
587
588 /* If no length given save entire legic read buffer */
589 /* round up to nearest 8 bytes so the saved data can be used with legicload */
590 if (requested == 0)
591 requested = 1024;
592
593 if (requested % 8 != 0) {
594 int remainder = requested % 8;
595 requested = requested + 8 - remainder;
596 }
597
598 if (offset + requested > sizeof(got)) {
599 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
600 return 0;
601 }
602
603 GetFromBigBuf(got, requested, offset);
604 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
605 PrintAndLog("Command execute timeout");
606 return 1;
607 }
608
609 FILE *f = fopen(filename, "w");
610 if(!f) {
611 PrintAndLog("couldn't open '%s'", Cmd+1);
612 return -1;
613 }
614
615 for (int j = 0; j < requested; j += 8) {
616 fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
617 got[j+0], got[j+1], got[j+2], got[j+3],
618 got[j+4], got[j+5], got[j+6], got[j+7]
619 );
620 delivered += 8;
621 if (delivered >= requested) break;
622 }
623
624 fclose(f);
625 PrintAndLog("saved %u samples", delivered);
626 return 0;
627 }
628
629 //TODO: write a help text (iceman)
630 // should say which tagtype
631 // should load a tag to device mem.
632 int CmdLegicRfSim(const char *Cmd) {
633 UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
634 sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
635 clearCommandBuffer();
636 SendCommand(&c);
637 return 0;
638 }
639
640 int CmdLegicRfWrite(const char *Cmd) {
641
642 uint8_t *data = NULL;
643 uint8_t cmdp = 0;
644 bool errors = false;
645 int len = 0, bg, en;
646 uint32_t offset = 0, IV = 0x55;
647
648 while(param_getchar(Cmd, cmdp) != 0x00) {
649 switch(param_getchar(Cmd, cmdp)) {
650 case 'd':
651 case 'D':
652 // peek at length of the input string so we can
653 // figure out how many elements to malloc in "data"
654 bg=en=0;
655 if (param_getptr(Cmd, &bg, &en, cmdp+1)) {
656 errors = true;
657 break;
658 }
659 len = (en - bg + 1);
660
661 // check that user entered even number of characters
662 // for hex data string
663 if (len & 1) {
664 errors = true;
665 break;
666 }
667
668 // it's possible for user to accidentally enter "b" parameter
669 // more than once - we have to clean previous malloc
670 if (data)
671 free(data);
672 data = malloc(len >> 1);
673 if ( data == NULL ) {
674 PrintAndLog("Can't allocate memory. exiting");
675 errors = true;
676 break;
677 }
678
679 if (param_gethex(Cmd, cmdp+1, data, len)) {
680 errors = true;
681 break;
682 }
683
684 len >>= 1;
685 cmdp += 2;
686 break;
687 case 'o':
688 case 'O':
689 offset = param_get32ex(Cmd, cmdp+1, 4, 10);
690 cmdp += 2;
691 break;
692 case 'h':
693 case 'H':
694 errors = true;
695 break;
696 default:
697 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
698 errors = true;
699 break;
700 }
701 if (errors) break;
702 }
703 //Validations
704 if (errors){
705 if (data)
706 free(data);
707 return usage_legic_write();
708 }
709
710 // tagtype
711 legic_card_select_t card;
712 if (legic_get_type(&card)) {
713 PrintAndLog("Failed to identify tagtype");
714 return -1;
715 }
716
717 legic_print_type(card.cardsize, 0);
718
719 // OUT-OF-BOUNDS check
720 // UID 4 bytes can't be written to.
721 if ( len + offset + 4 >= card.cardsize ) {
722 PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset + 4);
723 return -2;
724 }
725
726 legic_chk_iv(&IV);
727
728 PrintAndLog("Writing to tag");
729 UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
730 memcpy(c.d.asBytes, data, len);
731
732 clearCommandBuffer();
733 SendCommand(&c);
734 UsbCommand resp;
735 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
736 PrintAndLog("command execution time out");
737 return 1;
738 }
739 uint8_t isOK = resp.arg[0] & 0xFF;
740 if ( !isOK ) {
741 PrintAndLog("failed writing tag");
742 return 1;
743 }
744
745 return 0;
746 }
747
748 /*
749 int CmdLegicRfRawWrite(const char *Cmd) {
750 PrintAndLog("############# DANGER !! #############");
751 PrintAndLog("# changing the DCF is irreversible #");
752 PrintAndLog("#####################################");
753 PrintAndLog("do youe really want to continue? y(es) n(o)");
754 // if (scanf(" %c", &answer) > 0 && (answer == 'y' || answer == 'Y')) {
755 // return 0;
756 // }
757 return 0;
758 }
759 */
760
761 int CmdLegicCalcCrc(const char *Cmd){
762
763 uint8_t *data = NULL;
764 uint8_t cmdp = 0, uidcrc = 0, type=0;
765 bool errors = false;
766 int len = 0;
767 int bg, en;
768
769 while(param_getchar(Cmd, cmdp) != 0x00) {
770 switch(param_getchar(Cmd, cmdp)) {
771 case 'b':
772 case 'B':
773 // peek at length of the input string so we can
774 // figure out how many elements to malloc in "data"
775 bg=en=0;
776 if (param_getptr(Cmd, &bg, &en, cmdp+1)) {
777 errors = true;
778 break;
779 }
780 len = (en - bg + 1);
781
782 // check that user entered even number of characters
783 // for hex data string
784 if (len & 1) {
785 errors = true;
786 break;
787 }
788
789 // it's possible for user to accidentally enter "b" parameter
790 // more than once - we have to clean previous malloc
791 if (data) free(data);
792 data = malloc(len >> 1);
793 if ( data == NULL ) {
794 PrintAndLog("Can't allocate memory. exiting");
795 errors = true;
796 break;
797 }
798
799 if (param_gethex(Cmd, cmdp+1, data, len)) {
800 errors = true;
801 break;
802 }
803
804 len >>= 1;
805 cmdp += 2;
806 break;
807 case 'u':
808 case 'U':
809 uidcrc = param_get8ex(Cmd, cmdp+1, 0, 16);
810 cmdp += 2;
811 break;
812 case 'c':
813 case 'C':
814 type = param_get8ex(Cmd, cmdp+1, 0, 10);
815 cmdp += 2;
816 break;
817 case 'h':
818 case 'H':
819 errors = true;
820 break;
821 default:
822 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
823 errors = true;
824 break;
825 }
826 if (errors) break;
827 }
828 //Validations
829 if (errors){
830 if (data) free(data);
831 return usage_legic_calccrc();
832 }
833
834 switch (type){
835 case 16:
836 PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc));
837 break;
838 default:
839 PrintAndLog("Legic crc8: %X", CRC8Legic(data, len) );
840 break;
841 }
842
843 if (data) free(data);
844 return 0;
845 }
846
847 int legic_print_type(uint32_t tagtype, uint8_t spaces){
848 char spc[11] = " ";
849 spc[10]=0x00;
850 char *spacer = spc + (10-spaces);
851
852 if ( tagtype == 22 )
853 PrintAndLog("%sTYPE : MIM%d card (outdated)", spacer, tagtype);
854 else if ( tagtype == 256 )
855 PrintAndLog("%sTYPE : MIM%d card (234 bytes)", spacer, tagtype);
856 else if ( tagtype == 1024 )
857 PrintAndLog("%sTYPE : MIM%d card (1002 bytes)", spacer, tagtype);
858 else
859 PrintAndLog("%sTYPE : Unknown %06x", spacer, tagtype);
860 return 0;
861 }
862 int legic_get_type(legic_card_select_t *card){
863
864 if ( card == NULL ) return 1;
865
866 UsbCommand c = {CMD_LEGIC_INFO, {0,0,0}};
867 clearCommandBuffer();
868 SendCommand(&c);
869 UsbCommand resp;
870 if (!WaitForResponseTimeout(CMD_ACK, &resp, 500))
871 return 2;
872
873 uint8_t isOK = resp.arg[0] & 0xFF;
874 if ( !isOK )
875 return 3;
876
877 memcpy(card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t));
878 return 0;
879 }
880 void legic_chk_iv(uint32_t *iv){
881 if ( (*iv & 0x7F) != *iv ){
882 *iv &= 0x7F;
883 PrintAndLog("Truncating IV to 7bits, %u", *iv);
884 }
885 // IV must be odd
886 if ( (*iv & 1) == 0 ){
887 *iv |= 0x01;
888 PrintAndLog("LSB of IV must be SET %u", *iv);
889 }
890 }
891 void legic_seteml(uint8_t *src, uint32_t offset, uint32_t numofbytes) {
892 size_t len = 0;
893 UsbCommand c = {CMD_LEGIC_ESET, {0, 0, 0}};
894 for(size_t i = 0; i < numofbytes; i += USB_CMD_DATA_SIZE) {
895
896 len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);
897 c.arg[0] = i; // offset
898 c.arg[1] = len; // number of bytes
899 memcpy(c.d.asBytes, src+i, len);
900 clearCommandBuffer();
901 SendCommand(&c);
902 PrintAndLog("ICE: offset %d | len %d", i, len);
903 }
904 }
905
906 int HFLegicReader(const char *Cmd, bool verbose) {
907
908 char cmdp = param_getchar(Cmd, 0);
909 if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_reader();
910
911 legic_card_select_t card;
912 switch(legic_get_type(&card)){
913 case 1:
914 if ( verbose ) PrintAndLog("command execution time out");
915 return 1;
916 case 2:
917 case 3:
918 if ( verbose ) PrintAndLog("legic card select failed");
919 return 2;
920 default: break;
921 }
922 PrintAndLog(" UID : %s", sprint_hex(card.uid, sizeof(card.uid)));
923 legic_print_type(card.cardsize, 0);
924 return 0;
925 }
926 int CmdLegicReader(const char *Cmd){
927 return HFLegicReader(Cmd, TRUE);
928 }
929
930 int CmdLegicDump(const char *Cmd){
931
932 FILE *f;
933 char filename[FILE_PATH_SIZE] = {0x00};
934 char *fnameptr = filename;
935 size_t fileNlen = 0;
936 bool errors = false;
937 uint16_t dumplen;
938 uint8_t cmdp = 0;
939
940 memset(filename, 0, sizeof(filename));
941
942 while(param_getchar(Cmd, cmdp) != 0x00) {
943 switch(param_getchar(Cmd, cmdp)) {
944 case 'h':
945 case 'H':
946 return usage_legic_dump();
947 case 'o':
948 case 'O':
949 fileNlen = param_getstr(Cmd, cmdp+1, filename);
950 if (!fileNlen)
951 errors = true;
952 if (fileNlen > FILE_PATH_SIZE-5)
953 fileNlen = FILE_PATH_SIZE-5;
954 cmdp += 2;
955 break;
956 default:
957 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
958 errors = true;
959 break;
960 }
961 if(errors) break;
962 }
963
964 //Validations
965 if(errors) return usage_legic_dump();
966
967 // tagtype
968 legic_card_select_t card;
969 if (legic_get_type(&card)) {
970 PrintAndLog("Failed to identify tagtype");
971 return -1;
972 }
973 dumplen = card.cardsize;
974
975 legic_print_type(dumplen, 0);
976 PrintAndLog("Reading tag memory...");
977
978 UsbCommand c = {CMD_READER_LEGIC_RF, {0x00, dumplen, 0x55}};
979 clearCommandBuffer();
980 SendCommand(&c);
981 UsbCommand resp;
982 if (!WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
983 PrintAndLog("Command execute time-out");
984 return 1;
985 }
986
987 uint8_t isOK = resp.arg[0] & 0xFF;
988 if ( !isOK ) {
989 PrintAndLog("Failed dumping tag data");
990 return 2;
991 }
992
993 uint16_t readlen = resp.arg[1];
994 uint8_t *data = malloc(readlen);
995 if (!data) {
996 PrintAndLog("Fail, cannot allocate memory");
997 return 3;
998 }
999 memset(data, 0, readlen);
1000
1001 if ( readlen != dumplen )
1002 PrintAndLog("Fail, only managed to read 0x%02X bytes of 0x%02X", readlen, dumplen);
1003
1004 // copy data from device
1005 GetEMLFromBigBuf(data, readlen, 0);
1006 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
1007 PrintAndLog("Fail, transfer from device time-out");
1008 free(data);
1009 return 4;
1010 }
1011
1012 // user supplied filename?
1013 if (fileNlen < 1)
1014 sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
1015 else
1016 sprintf(fnameptr + fileNlen,".bin");
1017
1018 if ((f = fopen(filename,"wb")) == NULL) {
1019 PrintAndLog("Could not create file name %s", filename);
1020 if (data)
1021 free(data);
1022 return 5;
1023 }
1024 fwrite(data, 1, readlen, f);
1025 fclose(f);
1026 free(data);
1027 PrintAndLog("Wrote %d bytes to %s", readlen, filename);
1028 return 0;
1029 }
1030
1031 int CmdLegicELoad(const char *Cmd) {
1032 FILE * f;
1033 char filename[FILE_PATH_SIZE];
1034 char *fnameptr = filename;
1035 int len, numofbytes;
1036 int nameParamNo = 1;
1037
1038 char cmdp = param_getchar(Cmd, 0);
1039 if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
1040 return usage_legic_eload();
1041
1042 switch (cmdp) {
1043 case '0' : numofbytes = 22; break;
1044 case '1' :
1045 case '\0': numofbytes = 256; break;
1046 case '2' : numofbytes = 1024; break;
1047 default : numofbytes = 256; nameParamNo = 0;break;
1048 }
1049
1050 // set up buffer
1051 uint8_t *data = malloc(numofbytes);
1052 if (!data) {
1053 PrintAndLog("Fail, cannot allocate memory");
1054 return 3;
1055 }
1056 memset(data, 0, numofbytes);
1057
1058 // set up file
1059 len = param_getstr(Cmd, nameParamNo, filename);
1060 if (len > FILE_PATH_SIZE - 5)
1061 len = FILE_PATH_SIZE - 5;
1062 fnameptr += len;
1063 sprintf(fnameptr, ".bin");
1064
1065 // open file
1066 if ((f = fopen(filename,"rb")) == NULL) {
1067 PrintAndLog("File %s not found or locked", filename);
1068 free(data);
1069 return 1;
1070 }
1071
1072 // load file
1073 size_t bytes_read = fread(data, 1, numofbytes, f);
1074 if ( bytes_read == 0){
1075 PrintAndLog("File reading error");
1076 free(data);
1077 fclose(f);
1078 return 2;
1079 }
1080 fclose(f);
1081
1082 // transfer to device
1083 legic_seteml(data, 0, numofbytes);
1084
1085 free(data);
1086 PrintAndLog("\nLoaded %d bytes from file: %s to emulator memory", numofbytes, filename);
1087 return 0;
1088 }
1089
1090 int CmdLegicESave(const char *Cmd) {
1091 FILE *f;
1092 char filename[FILE_PATH_SIZE];
1093 char *fnameptr = filename;
1094 int fileNlen, numofbytes, nameParamNo = 1;
1095
1096 memset(filename, 0, sizeof(filename));
1097
1098 char cmdp = param_getchar(Cmd, 0);
1099
1100 if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
1101 return usage_legic_esave();
1102
1103 switch (cmdp) {
1104 case '0' : numofbytes = 22; break;
1105 case '1' :
1106 case '\0': numofbytes = 256; break;
1107 case '2' : numofbytes = 1024; break;
1108 default : numofbytes = 256; nameParamNo = 0; break;
1109 }
1110
1111 fileNlen = param_getstr(Cmd, nameParamNo, filename);
1112
1113 if (fileNlen > FILE_PATH_SIZE - 5)
1114 fileNlen = FILE_PATH_SIZE - 5;
1115
1116 // set up buffer
1117 uint8_t *data = malloc(numofbytes);
1118 if (!data) {
1119 PrintAndLog("Fail, cannot allocate memory");
1120 return 3;
1121 }
1122 memset(data, 0, numofbytes);
1123
1124 // download emulator memory
1125 PrintAndLog("Reading emulator memory...");
1126 GetEMLFromBigBuf(data, numofbytes, 0);
1127 if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
1128 PrintAndLog("Fail, transfer from device time-out");
1129 free(data);
1130 return 4;
1131 }
1132
1133 // user supplied filename?
1134 if (fileNlen < 1)
1135 sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
1136 else
1137 sprintf(fnameptr + fileNlen,".bin");
1138
1139 // open file
1140 if ((f = fopen(filename,"wb")) == NULL) {
1141 PrintAndLog("Could not create file name %s", filename);
1142 free(data);
1143 return 1;
1144 }
1145 fwrite(data, 1, numofbytes, f);
1146 fclose(f);
1147 free(data);
1148 PrintAndLog("\nSaved %d bytes from emulator memory to file: %s", numofbytes, filename);
1149 return 0;
1150 }
1151
1152 static command_t CommandTable[] = {
1153 {"help", CmdHelp, 1, "This help"},
1154 {"reader", CmdLegicReader, 1, "LEGIC Prime Reader UID and Type tag info"},
1155 {"info", CmdLegicInfo, 0, "Display deobfuscated and decoded LEGIC Prime tag data"},
1156 {"dump", CmdLegicDump, 0, "Dump LEGIC Prime card to binary file"},
1157 {"rdmem", CmdLegicRdmem, 0, "[offset][length] <iv> -- read bytes from a LEGIC card"},
1158 {"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"},
1159 {"load", CmdLegicLoad, 0, "<filename> -- Restore samples"},
1160 {"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
1161 {"write", CmdLegicRfWrite, 0, "<offset> <length> <iv> -- Write sample buffer (user after load or read)"},
1162 {"crc", CmdLegicCalcCrc, 1, "Calculate Legic CRC over given hexbytes"},
1163 {"eload", CmdLegicELoad, 1, "Load binary dump to emulator memory"},
1164 {"esave", CmdLegicESave, 1, "Save emulator memory to binary file"},
1165 {NULL, NULL, 0, NULL}
1166 };
1167
1168 int CmdHFLegic(const char *Cmd) {
1169 clearCommandBuffer();
1170 CmdsParse(CommandTable, Cmd);
1171 return 0;
1172 }
1173
1174 int CmdHelp(const char *Cmd) {
1175 CmdsHelp(CommandTable);
1176 return 0;
1177 }
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