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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 | // 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_calccrc8(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 crc8 [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 crc8 b deadbeef1122"); | |
28 | PrintAndLog(" hf legic crc8 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_read(void){ | |
43 | PrintAndLog("Read data from a legic tag."); | |
44 | PrintAndLog("Usage: hf legic read [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 read 0 21 - reads from byte[0] 21 bytes(system header)"); | |
53 | PrintAndLog(" hf legic read 0 4 55 - reads from byte[0] 4 bytes with IV 0x55"); | |
54 | PrintAndLog(" hf legic read 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] <offset> <length> <IV>"); | |
64 | PrintAndLog("Options:"); | |
65 | PrintAndLog(" h : this help"); | |
66 | PrintAndLog(" <offset> : offset in data array to start writing from (hex)"); | |
67 | PrintAndLog(" <length> : number of bytes to write (hex)"); | |
68 | PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)"); | |
69 | PrintAndLog(""); | |
70 | PrintAndLog("Samples:"); | |
71 | PrintAndLog(" hf legic write 10 4 - writes 0x4 to byte[0x10]"); | |
72 | return 0; | |
73 | } | |
74 | int usage_legic_rawwrite(void){ | |
75 | PrintAndLog("Write raw data direct to a specific offset on legic tag."); | |
76 | PrintAndLog("Usage: hf legic writeraw [h] <offset> <value> <IV>"); | |
77 | PrintAndLog("Options:"); | |
78 | PrintAndLog(" h : this help"); | |
79 | PrintAndLog(" <offset> : offset to write to (hex)"); | |
80 | PrintAndLog(" <value> : value (hex)"); | |
81 | PrintAndLog(" <IV> : (optional) Initialization vector to use (hex, odd and 7bits)"); | |
82 | PrintAndLog(""); | |
83 | PrintAndLog("Samples:"); | |
84 | PrintAndLog(" hf legic writeraw 10 4 - writes 0x4 to byte[0x10]"); | |
85 | return 0; | |
86 | } | |
87 | int usage_legic_fill(void){ | |
88 | PrintAndLog("Missing help text."); | |
89 | return 0; | |
90 | } | |
91 | int usage_legic_info(void){ | |
92 | PrintAndLog("Read info from a legic tag."); | |
93 | PrintAndLog("Usage: hf legic info [h]"); | |
94 | PrintAndLog("Options:"); | |
95 | PrintAndLog(" h : this help"); | |
96 | PrintAndLog(""); | |
97 | PrintAndLog("Samples:"); | |
98 | PrintAndLog(" hf legic info"); | |
99 | return 0; | |
100 | } | |
101 | /* | |
102 | * Output BigBuf and deobfuscate LEGIC RF tag data. | |
103 | * This is based on information given in the talk held | |
104 | * by Henryk Ploetz and Karsten Nohl at 26c3 | |
105 | */ | |
106 | int CmdLegicDecode(const char *Cmd) { | |
107 | ||
108 | int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0; | |
109 | int crc = 0, wrp = 0, wrc = 0; | |
110 | uint8_t stamp_len = 0; | |
111 | uint8_t data[1024]; // receiver buffer | |
112 | char token_type[5] = {0,0,0,0,0}; | |
113 | int dcf = 0; | |
114 | int bIsSegmented = 0; | |
115 | ||
116 | // copy data from device | |
117 | GetEMLFromBigBuf(data, sizeof(data), 0); | |
118 | if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){ | |
119 | PrintAndLog("Command execute timeout"); | |
120 | return 1; | |
121 | } | |
122 | ||
123 | // Output CDF System area (9 bytes) plus remaining header area (12 bytes) | |
124 | crc = data[4]; | |
125 | uint32_t calc_crc = CRC8Legic(data, 4); | |
126 | ||
127 | PrintAndLog("\nCDF: System Area"); | |
128 | PrintAndLog("------------------------------------------------------"); | |
129 | PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s", | |
130 | data[0], | |
131 | data[1], | |
132 | data[2], | |
133 | data[3], | |
134 | data[4], | |
135 | (calc_crc == crc) ? "OK":"Fail" | |
136 | ); | |
137 | ||
138 | ||
139 | token_type[0] = 0; | |
140 | dcf = ((int)data[6] << 8) | (int)data[5]; | |
141 | ||
142 | // New unwritten media? | |
143 | if(dcf == 0xFFFF) { | |
144 | ||
145 | PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)", | |
146 | dcf, | |
147 | data[5], | |
148 | data[6] | |
149 | ); | |
150 | ||
151 | } else if(dcf > 60000) { // Master token? | |
152 | ||
153 | int fl = 0; | |
154 | ||
155 | if(data[6] == 0xec) { | |
156 | strncpy(token_type, "XAM", sizeof(token_type)); | |
157 | fl = 1; | |
158 | stamp_len = 0x0c - (data[5] >> 4); | |
159 | } else { | |
160 | switch (data[5] & 0x7f) { | |
161 | case 0x00 ... 0x2f: | |
162 | strncpy(token_type, "IAM", sizeof(token_type)); | |
163 | fl = (0x2f - (data[5] & 0x7f)) + 1; | |
164 | break; | |
165 | case 0x30 ... 0x6f: | |
166 | strncpy(token_type, "SAM", sizeof(token_type)); | |
167 | fl = (0x6f - (data[5] & 0x7f)) + 1; | |
168 | break; | |
169 | case 0x70 ... 0x7f: | |
170 | strncpy(token_type, "GAM", sizeof(token_type)); | |
171 | fl = (0x7f - (data[5] & 0x7f)) + 1; | |
172 | break; | |
173 | } | |
174 | ||
175 | stamp_len = 0xfc - data[6]; | |
176 | } | |
177 | ||
178 | PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u", | |
179 | dcf, | |
180 | data[5], | |
181 | data[6], | |
182 | token_type, | |
183 | (data[5] & 0x80 )>> 7, | |
184 | stamp_len, | |
185 | fl | |
186 | ); | |
187 | ||
188 | } else { // Is IM(-S) type of card... | |
189 | ||
190 | if(data[7] == 0x9F && data[8] == 0xFF) { | |
191 | bIsSegmented = 1; | |
192 | strncpy(token_type, "IM-S", sizeof(token_type)); | |
193 | } else { | |
194 | strncpy(token_type, "IM", sizeof(token_type)); | |
195 | } | |
196 | ||
197 | PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u)", | |
198 | dcf, | |
199 | data[5], | |
200 | data[6], | |
201 | token_type, | |
202 | (data[5]&0x80) >> 7 | |
203 | ); | |
204 | } | |
205 | ||
206 | // Makes no sence to show this on blank media... | |
207 | if(dcf != 0xFFFF) { | |
208 | ||
209 | if(bIsSegmented) { | |
210 | PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, SSC=%02x", | |
211 | data[7] & 0x0f, | |
212 | (data[7] & 0x70) >> 4, | |
213 | (data[7] & 0x80) >> 7, | |
214 | data[8] | |
215 | ); | |
216 | } | |
217 | ||
218 | // Header area is only available on IM-S cards, on master tokens this data is the master token data itself | |
219 | if(bIsSegmented || dcf > 60000) { | |
220 | if(dcf > 60000) { | |
221 | PrintAndLog("Master token data"); | |
222 | PrintAndLog("%s", sprint_hex(data+8, 14)); | |
223 | } else { | |
224 | PrintAndLog("Remaining Header Area"); | |
225 | PrintAndLog("%s", sprint_hex(data+9, 13)); | |
226 | } | |
227 | } | |
228 | } | |
229 | ||
230 | uint8_t segCrcBytes[8] = {0,0,0,0,0,0,0,0}; | |
231 | uint32_t segCalcCRC = 0; | |
232 | uint32_t segCRC = 0; | |
233 | ||
234 | // Data card? | |
235 | if(dcf <= 60000) { | |
236 | ||
237 | PrintAndLog("\nADF: User Area"); | |
238 | PrintAndLog("------------------------------------------------------"); | |
239 | ||
240 | if(bIsSegmented) { | |
241 | ||
242 | // Data start point on segmented cards | |
243 | i = 22; | |
244 | ||
245 | // decode segments | |
246 | for (segmentNum=1; segmentNum < 128; segmentNum++ ) | |
247 | { | |
248 | segment_len = ((data[i+1] ^ crc) & 0x0f) * 256 + (data[i] ^ crc); | |
249 | segment_flag = ((data[i+1] ^ crc) & 0xf0) >> 4; | |
250 | wrp = (data[i+2] ^ crc); | |
251 | wrc = ((data[i+3] ^ crc) & 0x70) >> 4; | |
252 | ||
253 | bool hasWRC = (wrc > 0); | |
254 | bool hasWRP = (wrp > wrc); | |
255 | int wrp_len = (wrp - wrc); | |
256 | int remain_seg_payload_len = (segment_len - wrp - 5); | |
257 | ||
258 | // validate segment-crc | |
259 | segCrcBytes[0]=data[0]; //uid0 | |
260 | segCrcBytes[1]=data[1]; //uid1 | |
261 | segCrcBytes[2]=data[2]; //uid2 | |
262 | segCrcBytes[3]=data[3]; //uid3 | |
263 | segCrcBytes[4]=(data[i] ^ crc); //hdr0 | |
264 | segCrcBytes[5]=(data[i+1] ^ crc); //hdr1 | |
265 | segCrcBytes[6]=(data[i+2] ^ crc); //hdr2 | |
266 | segCrcBytes[7]=(data[i+3] ^ crc); //hdr3 | |
267 | ||
268 | segCalcCRC = CRC8Legic(segCrcBytes, 8); | |
269 | segCRC = data[i+4] ^ crc; | |
270 | ||
271 | 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)", | |
272 | segmentNum, | |
273 | data[i] ^ crc, | |
274 | data[i+1] ^ crc, | |
275 | data[i+2] ^ crc, | |
276 | data[i+3] ^ crc, | |
277 | segment_len, | |
278 | segment_flag, | |
279 | (segment_flag & 0x4) >> 2, | |
280 | (segment_flag & 0x8) >> 3, | |
281 | wrp, | |
282 | wrc, | |
283 | ((data[i+3]^crc) & 0x80) >> 7, | |
284 | segCRC, | |
285 | ( segCRC == segCalcCRC ) ? "OK" : "fail" | |
286 | ); | |
287 | ||
288 | i += 5; | |
289 | ||
290 | if ( hasWRC ) { | |
291 | PrintAndLog("WRC protected area: (I %d | K %d| WRC %d)", i, k, wrc); | |
292 | PrintAndLog("\nrow | data"); | |
293 | PrintAndLog("-----+------------------------------------------------"); | |
294 | ||
295 | for ( k=i; k < (i + wrc); ++k) | |
296 | data[k] ^= crc; | |
297 | ||
298 | print_hex_break( data+i, wrc, 16); | |
299 | ||
300 | i += wrc; | |
301 | } | |
302 | ||
303 | if ( hasWRP ) { | |
304 | PrintAndLog("Remaining write protected area: (I %d | K %d | WRC %d | WRP %d WRP_LEN %d)",i, k, wrc, wrp, wrp_len); | |
305 | PrintAndLog("\nrow | data"); | |
306 | PrintAndLog("-----+------------------------------------------------"); | |
307 | ||
308 | for (k=i; k < (i+wrp_len); ++k) | |
309 | data[k] ^= crc; | |
310 | ||
311 | print_hex_break( data+i, wrp_len, 16); | |
312 | ||
313 | i += wrp_len; | |
314 | ||
315 | // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...) | |
316 | if( wrp_len == 8 ) | |
317 | PrintAndLog("Card ID: %2X%02X%02X", data[i-4]^crc, data[i-3]^crc, data[i-2]^crc); | |
318 | } | |
319 | ||
320 | PrintAndLog("Remaining segment payload: (I %d | K %d | Remain LEN %d)", i, k, remain_seg_payload_len); | |
321 | PrintAndLog("\nrow | data"); | |
322 | PrintAndLog("-----+------------------------------------------------"); | |
323 | ||
324 | for ( k=i; k < (i+remain_seg_payload_len); ++k) | |
325 | data[k] ^= crc; | |
326 | ||
327 | print_hex_break( data+i, remain_seg_payload_len, 16); | |
328 | ||
329 | i += remain_seg_payload_len; | |
330 | ||
331 | PrintAndLog("-----+------------------------------------------------\n"); | |
332 | ||
333 | // end with last segment | |
334 | if (segment_flag & 0x8) return 0; | |
335 | ||
336 | } // end for loop | |
337 | ||
338 | } else { | |
339 | ||
340 | // Data start point on unsegmented cards | |
341 | i = 8; | |
342 | ||
343 | wrp = data[7] & 0x0F; | |
344 | wrc = (data[7] & 0x70) >> 4; | |
345 | ||
346 | bool hasWRC = (wrc > 0); | |
347 | bool hasWRP = (wrp > wrc); | |
348 | int wrp_len = (wrp - wrc); | |
349 | int remain_seg_payload_len = (1024 - 22 - wrp); // Any chance to get physical card size here!? | |
350 | ||
351 | PrintAndLog("Unsegmented card - WRP: %02u, WRC: %02u, RD: %01u", | |
352 | wrp, | |
353 | wrc, | |
354 | (data[7] & 0x80) >> 7 | |
355 | ); | |
356 | ||
357 | if ( hasWRC ) { | |
358 | PrintAndLog("WRC protected area: (I %d | WRC %d)", i, wrc); | |
359 | PrintAndLog("\nrow | data"); | |
360 | PrintAndLog("-----+------------------------------------------------"); | |
361 | print_hex_break( data+i, wrc, 16); | |
362 | i += wrc; | |
363 | } | |
364 | ||
365 | if ( hasWRP ) { | |
366 | PrintAndLog("Remaining write protected area: (I %d | WRC %d | WRP %d | WRP_LEN %d)", i, wrc, wrp, wrp_len); | |
367 | PrintAndLog("\nrow | data"); | |
368 | PrintAndLog("-----+------------------------------------------------"); | |
369 | print_hex_break( data + i, wrp_len, 16); | |
370 | i += wrp_len; | |
371 | ||
372 | // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...) | |
373 | if( wrp_len == 8 ) | |
374 | PrintAndLog("Card ID: %2X%02X%02X", data[i-4], data[i-3], data[i-2]); | |
375 | } | |
376 | ||
377 | PrintAndLog("Remaining segment payload: (I %d | Remain LEN %d)", i, remain_seg_payload_len); | |
378 | PrintAndLog("\nrow | data"); | |
379 | PrintAndLog("-----+------------------------------------------------"); | |
380 | print_hex_break( data + i, remain_seg_payload_len, 16); | |
381 | i += remain_seg_payload_len; | |
382 | ||
383 | PrintAndLog("-----+------------------------------------------------\n"); | |
384 | } | |
385 | } | |
386 | return 0; | |
387 | } | |
388 | ||
389 | int CmdLegicRFRead(const char *Cmd) { | |
390 | ||
391 | // params: | |
392 | // offset in data memory | |
393 | // number of bytes to read | |
394 | char cmdp = param_getchar(Cmd, 0); | |
395 | if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_read(); | |
396 | ||
397 | uint32_t offset = 0, len = 0, IV = 1; | |
398 | sscanf(Cmd, "%x %x %x", &offset, &len, &IV); | |
399 | ||
400 | // OUT-OF-BOUNDS check | |
401 | if ( len + offset > MAX_LENGTH ) { | |
402 | len = MAX_LENGTH - offset; | |
403 | PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len, len); | |
404 | } | |
405 | ||
406 | if ( (IV & 0x7F) != IV ){ | |
407 | IV &= 0x7F; | |
408 | PrintAndLog("Truncating IV to 7bits"); | |
409 | } | |
410 | ||
411 | if ( (IV & 1) == 0 ){ | |
412 | IV |= 0x01; | |
413 | PrintAndLog("LSB of IV must be SET"); | |
414 | } | |
415 | ||
416 | UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}}; | |
417 | clearCommandBuffer(); | |
418 | SendCommand(&c); | |
419 | UsbCommand resp; | |
420 | if (WaitForResponseTimeout(CMD_ACK, &resp, 3000)) { | |
421 | uint8_t isOK = resp.arg[0] & 0xFF; | |
422 | uint16_t readlen = resp.arg[1]; | |
423 | if ( isOK ) { | |
424 | ||
425 | uint8_t *data = malloc(readlen); | |
426 | if ( !data ){ | |
427 | PrintAndLog("Cannot allocate memory"); | |
428 | return 2; | |
429 | } | |
430 | ||
431 | if ( readlen != len ) | |
432 | PrintAndLog("Fail, only managed to read 0x%02X bytes", readlen); | |
433 | ||
434 | // copy data from device | |
435 | GetEMLFromBigBuf(data, readlen, 0); | |
436 | if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)){ | |
437 | PrintAndLog("Command execute timeout"); | |
438 | if ( data ) | |
439 | free(data); | |
440 | return 1; | |
441 | } | |
442 | ||
443 | PrintAndLog("\n ## | Data"); | |
444 | PrintAndLog("-----+-----"); | |
445 | print_hex_break( data, readlen, 32); | |
446 | } else { | |
447 | PrintAndLog("failed reading tag"); | |
448 | } | |
449 | } else { | |
450 | PrintAndLog("command execution time out"); | |
451 | return 1; | |
452 | } | |
453 | return 0; | |
454 | } | |
455 | ||
456 | int CmdLegicLoad(const char *Cmd) { | |
457 | ||
458 | // iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :) | |
459 | char cmdp = param_getchar(Cmd, 0); | |
460 | if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) return usage_legic_load(); | |
461 | ||
462 | char filename[FILE_PATH_SIZE] = {0x00}; | |
463 | int len = strlen(Cmd); | |
464 | ||
465 | if (len > FILE_PATH_SIZE) { | |
466 | PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE); | |
467 | return 0; | |
468 | } | |
469 | memcpy(filename, Cmd, len); | |
470 | ||
471 | FILE *f = fopen(filename, "r"); | |
472 | if(!f) { | |
473 | PrintAndLog("couldn't open '%s'", Cmd); | |
474 | return -1; | |
475 | } | |
476 | ||
477 | char line[80]; | |
478 | int offset = 0; | |
479 | uint8_t data[USB_CMD_DATA_SIZE] = {0x00}; | |
480 | int index = 0; | |
481 | int totalbytes = 0; | |
482 | while ( fgets(line, sizeof(line), f) ) { | |
483 | int res = sscanf(line, "%x %x %x %x %x %x %x %x", | |
484 | (unsigned int *)&data[index], | |
485 | (unsigned int *)&data[index + 1], | |
486 | (unsigned int *)&data[index + 2], | |
487 | (unsigned int *)&data[index + 3], | |
488 | (unsigned int *)&data[index + 4], | |
489 | (unsigned int *)&data[index + 5], | |
490 | (unsigned int *)&data[index + 6], | |
491 | (unsigned int *)&data[index + 7]); | |
492 | ||
493 | if(res != 8) { | |
494 | PrintAndLog("Error: could not read samples"); | |
495 | fclose(f); | |
496 | return -1; | |
497 | } | |
498 | index += res; | |
499 | ||
500 | if ( index == USB_CMD_DATA_SIZE ){ | |
501 | // PrintAndLog("sent %d | %d | %d", index, offset, totalbytes); | |
502 | UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}}; | |
503 | memcpy(c.d.asBytes, data, sizeof(data)); | |
504 | clearCommandBuffer(); | |
505 | SendCommand(&c); | |
506 | if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){ | |
507 | PrintAndLog("Command execute timeout"); | |
508 | fclose(f); | |
509 | return 1; | |
510 | } | |
511 | offset += index; | |
512 | totalbytes += index; | |
513 | index = 0; | |
514 | } | |
515 | } | |
516 | fclose(f); | |
517 | ||
518 | // left over bytes? | |
519 | if ( index != 0 ) { | |
520 | UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}}; | |
521 | memcpy(c.d.asBytes, data, 8); | |
522 | clearCommandBuffer(); | |
523 | SendCommand(&c); | |
524 | if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){ | |
525 | PrintAndLog("Command execute timeout"); | |
526 | return 1; | |
527 | } | |
528 | totalbytes += index; | |
529 | } | |
530 | ||
531 | PrintAndLog("loaded %u samples", totalbytes); | |
532 | return 0; | |
533 | } | |
534 | ||
535 | int CmdLegicSave(const char *Cmd) { | |
536 | int requested = 1024; | |
537 | int offset = 0; | |
538 | int delivered = 0; | |
539 | char filename[FILE_PATH_SIZE] = {0x00}; | |
540 | uint8_t got[1024] = {0x00}; | |
541 | ||
542 | memset(filename, 0, FILE_PATH_SIZE); | |
543 | ||
544 | sscanf(Cmd, " %s %i %i", filename, &requested, &offset); | |
545 | ||
546 | /* If no length given save entire legic read buffer */ | |
547 | /* round up to nearest 8 bytes so the saved data can be used with legicload */ | |
548 | if (requested == 0) | |
549 | requested = 1024; | |
550 | ||
551 | if (requested % 8 != 0) { | |
552 | int remainder = requested % 8; | |
553 | requested = requested + 8 - remainder; | |
554 | } | |
555 | ||
556 | if (offset + requested > sizeof(got)) { | |
557 | PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024"); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | GetFromBigBuf(got, requested, offset); | |
562 | if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){ | |
563 | PrintAndLog("Command execute timeout"); | |
564 | return 1; | |
565 | } | |
566 | ||
567 | FILE *f = fopen(filename, "w"); | |
568 | if(!f) { | |
569 | PrintAndLog("couldn't open '%s'", Cmd+1); | |
570 | return -1; | |
571 | } | |
572 | ||
573 | for (int j = 0; j < requested; j += 8) { | |
574 | fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n", | |
575 | got[j+0], got[j+1], got[j+2], got[j+3], | |
576 | got[j+4], got[j+5], got[j+6], got[j+7] | |
577 | ); | |
578 | delivered += 8; | |
579 | if (delivered >= requested) break; | |
580 | } | |
581 | ||
582 | fclose(f); | |
583 | PrintAndLog("saved %u samples", delivered); | |
584 | return 0; | |
585 | } | |
586 | ||
587 | //TODO: write a help text (iceman) | |
588 | int CmdLegicRfSim(const char *Cmd) { | |
589 | UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}}; | |
590 | sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]); | |
591 | clearCommandBuffer(); | |
592 | SendCommand(&c); | |
593 | return 0; | |
594 | } | |
595 | ||
596 | int CmdLegicRfWrite(const char *Cmd) { | |
597 | ||
598 | // params: | |
599 | // offset - in tag memory | |
600 | // length - num of bytes to be written | |
601 | // IV - initialisation vector | |
602 | ||
603 | char cmdp = param_getchar(Cmd, 0); | |
604 | if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_write(); | |
605 | ||
606 | uint32_t offset = 0, len = 0, IV = 0; | |
607 | ||
608 | int res = sscanf(Cmd, "%x %x %x", &offset, &len, &IV); | |
609 | if(res < 2) { | |
610 | PrintAndLog("Please specify the offset and length as two hex strings and, optionally, the IV also as an hex string"); | |
611 | return -1; | |
612 | } | |
613 | ||
614 | // OUT-OF-BOUNDS check | |
615 | if ( len + offset > MAX_LENGTH ) { | |
616 | len = MAX_LENGTH - offset; | |
617 | PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len, len); | |
618 | } | |
619 | if ( (IV & 0x7F) != IV ){ | |
620 | IV &= 0x7F; | |
621 | PrintAndLog("Truncating IV to 7bits"); | |
622 | } | |
623 | if ( (IV & 1) == 0 ){ | |
624 | IV |= 0x01; // IV must be odd | |
625 | PrintAndLog("LSB of IV must be SET"); | |
626 | } | |
627 | ||
628 | UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}}; | |
629 | clearCommandBuffer(); | |
630 | SendCommand(&c); | |
631 | UsbCommand resp; | |
632 | if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) { | |
633 | uint8_t isOK = resp.arg[0] & 0xFF; | |
634 | if ( isOK ) { | |
635 | } else { | |
636 | PrintAndLog("failed writig tag"); | |
637 | } | |
638 | } else { | |
639 | PrintAndLog("command execution time out"); | |
640 | return 1; | |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | int CmdLegicRfRawWrite(const char *Cmd) { | |
647 | ||
648 | char cmdp = param_getchar(Cmd, 0); | |
649 | if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rawwrite(); | |
650 | ||
651 | uint32_t offset = 0, data = 0, IV = 0; | |
652 | char answer; | |
653 | ||
654 | int res = sscanf(Cmd, "%x %x %x", &offset, &data, &IV); | |
655 | if(res < 2) | |
656 | return usage_legic_rawwrite(); | |
657 | ||
658 | // OUT-OF-BOUNDS check | |
659 | if ( offset > MAX_LENGTH ) { | |
660 | PrintAndLog("Out-of-bound, offset"); | |
661 | return 1; | |
662 | } | |
663 | ||
664 | if ( (IV & 0x7F) != IV ){ | |
665 | IV &= 0x7F; | |
666 | PrintAndLog("Truncating IV to 7bits"); | |
667 | } | |
668 | if ( (IV & 1) == 0 ){ | |
669 | IV |= 0x01; // IV must be odd | |
670 | PrintAndLog("LSB of IV must be SET"); | |
671 | } | |
672 | ||
673 | UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {offset, data, IV} }; | |
674 | ||
675 | if (c.arg[0] == 0x05 || c.arg[0] == 0x06) { | |
676 | PrintAndLog("############# DANGER !! #############"); | |
677 | PrintAndLog("# changing the DCF is irreversible #"); | |
678 | PrintAndLog("#####################################"); | |
679 | PrintAndLog("do youe really want to continue? y(es) n(o)"); | |
680 | if (scanf(" %c", &answer) > 0 && (answer == 'y' || answer == 'Y')) { | |
681 | SendCommand(&c); | |
682 | return 0; | |
683 | } | |
684 | return -1; | |
685 | } | |
686 | ||
687 | clearCommandBuffer(); | |
688 | SendCommand(&c); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | //TODO: write a help text (iceman) | |
693 | int CmdLegicRfFill(const char *Cmd) { | |
694 | UsbCommand cmd = {CMD_WRITER_LEGIC_RF, {0,0,0} }; | |
695 | int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]); | |
696 | if(res != 3) { | |
697 | PrintAndLog("Please specify the offset, length and value as two hex strings"); | |
698 | return -1; | |
699 | } | |
700 | ||
701 | int i; | |
702 | UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}}; | |
703 | memset(c.d.asBytes, cmd.arg[2], 48); | |
704 | ||
705 | for(i = 0; i < 22; i++) { | |
706 | c.arg[0] = i*48; | |
707 | ||
708 | clearCommandBuffer(); | |
709 | SendCommand(&c); | |
710 | WaitForResponse(CMD_ACK, NULL); | |
711 | } | |
712 | clearCommandBuffer(); | |
713 | SendCommand(&cmd); | |
714 | return 0; | |
715 | } | |
716 | ||
717 | void static calc4(uint8_t *cmd, uint8_t len){ | |
718 | crc_t crc; | |
719 | //crc_init_ref(&crc, 4, 0x19 >> 1, 0x5, 0, TRUE, TRUE); | |
720 | crc_init(&crc, 4, 0x19 >> 1, 0x5, 0); | |
721 | ||
722 | crc_clear(&crc); | |
723 | crc_update(&crc, 1, 1); /* CMD_READ */ | |
724 | crc_update(&crc, cmd[0], 8); | |
725 | crc_update(&crc, cmd[1], 8); | |
726 | printf("crc4 %X\n", reflect(crc_finish(&crc), 4) ) ; | |
727 | ||
728 | crc_clear(&crc); | |
729 | crc_update(&crc, 1, 1); /* CMD_READ */ | |
730 | crc_update(&crc, cmd[0], 8); | |
731 | crc_update(&crc, cmd[1], 8); | |
732 | printf("crc4 %X\n", crc_finish(&crc) ) ; | |
733 | ||
734 | printf("---- old ---\n"); | |
735 | crc_update2(&crc, 1, 1); /* CMD_READ */ | |
736 | crc_update2(&crc, cmd[0], 8); | |
737 | crc_update2(&crc, cmd[1], 8); | |
738 | printf("crc4 %X \n", reflect(crc_finish(&crc), 4) ) ; | |
739 | ||
740 | ||
741 | crc_clear(&crc); | |
742 | crc_update2(&crc, 1, 1); /* CMD_READ */ | |
743 | crc_update2(&crc, cmd[0], 8); | |
744 | crc_update2(&crc, cmd[1], 8); | |
745 | printf("crc4 %X\n", crc_finish(&crc) ) ; | |
746 | } | |
747 | ||
748 | int CmdLegicCalcCrc8(const char *Cmd){ | |
749 | ||
750 | uint8_t *data = NULL; | |
751 | uint8_t cmdp = 0, uidcrc = 0, type=0; | |
752 | bool errors = false; | |
753 | int len = 0; | |
754 | int bg, en; | |
755 | ||
756 | while(param_getchar(Cmd, cmdp) != 0x00) { | |
757 | switch(param_getchar(Cmd, cmdp)) { | |
758 | case 'b': | |
759 | case 'B': | |
760 | // peek at length of the input string so we can | |
761 | // figure out how many elements to malloc in "data" | |
762 | bg=en=0; | |
763 | if (param_getptr(Cmd, &bg, &en, cmdp+1)) { | |
764 | errors = true; | |
765 | break; | |
766 | } | |
767 | len = (en - bg + 1); | |
768 | ||
769 | // check that user entered even number of characters | |
770 | // for hex data string | |
771 | if (len & 1) { | |
772 | errors = true; | |
773 | break; | |
774 | } | |
775 | ||
776 | // it's possible for user to accidentally enter "b" parameter | |
777 | // more than once - we have to clean previous malloc | |
778 | if (data) free(data); | |
779 | data = malloc(len >> 1); | |
780 | if ( data == NULL ) { | |
781 | PrintAndLog("Can't allocate memory. exiting"); | |
782 | errors = true; | |
783 | break; | |
784 | } | |
785 | ||
786 | if (param_gethex(Cmd, cmdp+1, data, len)) { | |
787 | errors = true; | |
788 | break; | |
789 | } | |
790 | ||
791 | len >>= 1; | |
792 | cmdp += 2; | |
793 | break; | |
794 | case 'u': | |
795 | case 'U': | |
796 | uidcrc = param_get8ex(Cmd, cmdp+1, 0, 16); | |
797 | cmdp += 2; | |
798 | break; | |
799 | case 'c': | |
800 | case 'C': | |
801 | type = param_get8ex(Cmd, cmdp+1, 0, 10); | |
802 | cmdp += 2; | |
803 | break; | |
804 | case 'h': | |
805 | case 'H': | |
806 | errors = true; | |
807 | break; | |
808 | default: | |
809 | PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp)); | |
810 | errors = true; | |
811 | break; | |
812 | } | |
813 | if (errors) break; | |
814 | } | |
815 | //Validations | |
816 | if (errors){ | |
817 | if (data) free(data); | |
818 | return usage_legic_calccrc8(); | |
819 | } | |
820 | ||
821 | switch (type){ | |
822 | case 16: | |
823 | PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc)); | |
824 | break; | |
825 | case 4: | |
826 | calc4(data, 0); | |
827 | break; | |
828 | default: | |
829 | PrintAndLog("Legic crc8: %X", CRC8Legic(data, len) ); | |
830 | break; | |
831 | } | |
832 | ||
833 | if (data) free(data); | |
834 | return 0; | |
835 | } | |
836 | ||
837 | int HFLegicInfo(const char *Cmd, bool verbose) { | |
838 | ||
839 | char cmdp = param_getchar(Cmd, 0); | |
840 | if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_info(); | |
841 | ||
842 | UsbCommand c = {CMD_LEGIC_INFO, {0,0,0}}; | |
843 | clearCommandBuffer(); | |
844 | SendCommand(&c); | |
845 | UsbCommand resp; | |
846 | if (!WaitForResponseTimeout(CMD_ACK, &resp, 500)) { | |
847 | if ( verbose ) PrintAndLog("command execution time out"); | |
848 | return 1; | |
849 | } | |
850 | ||
851 | uint8_t isOK = resp.arg[0] & 0xFF; | |
852 | if ( !isOK ) { | |
853 | if ( verbose ) PrintAndLog("legic card select failed"); | |
854 | return 1; | |
855 | } | |
856 | ||
857 | legic_card_select_t card; | |
858 | memcpy(&card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t)); | |
859 | ||
860 | PrintAndLog(" UID : %s", sprint_hex(card.uid, sizeof(card.uid))); | |
861 | switch(card.cardsize) { | |
862 | case 22: | |
863 | case 256: | |
864 | case 1024: | |
865 | PrintAndLog(" TYPE : MIM%d card (%d bytes)", card.cardsize, card.cardsize); break; | |
866 | default: { | |
867 | PrintAndLog("Unknown card format: %d", card.cardsize); | |
868 | return 1; | |
869 | } | |
870 | } | |
871 | return 0; | |
872 | } | |
873 | int CmdLegicInfo(const char *Cmd){ | |
874 | return HFLegicInfo(Cmd, TRUE); | |
875 | } | |
876 | ||
877 | static command_t CommandTable[] = { | |
878 | {"help", CmdHelp, 1, "This help"}, | |
879 | {"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"}, | |
880 | {"read", CmdLegicRFRead, 0, "[offset][length] <iv> -- read bytes from a LEGIC card"}, | |
881 | {"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"}, | |
882 | {"load", CmdLegicLoad, 0, "<filename> -- Restore samples"}, | |
883 | {"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"}, | |
884 | {"write", CmdLegicRfWrite,0, "<offset> <length> <iv> -- Write sample buffer (user after load or read)"}, | |
885 | {"writeraw",CmdLegicRfRawWrite, 0, "<address> <value> <iv> -- Write direct to address"}, | |
886 | {"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"}, | |
887 | {"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"}, | |
888 | {"info", CmdLegicInfo, 1, "Information"}, | |
889 | {NULL, NULL, 0, NULL} | |
890 | }; | |
891 | ||
892 | int CmdHFLegic(const char *Cmd) { | |
893 | clearCommandBuffer(); | |
894 | CmdsParse(CommandTable, Cmd); | |
895 | return 0; | |
896 | } | |
897 | ||
898 | int CmdHelp(const char *Cmd) { | |
899 | CmdsHelp(CommandTable); | |
900 | return 0; | |
901 | } |