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1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3 // Merlok - 2017
4 //
5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
6 // at your option, any later version. See the LICENSE.txt file for the text of
7 // the license.
8 //-----------------------------------------------------------------------------
9 // High frequency commands
10 //-----------------------------------------------------------------------------
11
12 #include <stdlib.h>
13 #include <stdio.h>
14 #include <string.h>
15 #include "proxmark3.h"
16 #include "util.h"
17 #include "ui.h"
18 #include "iso14443crc.h"
19 #include "parity.h"
20 #include "cmdmain.h"
21 #include "cmdparser.h"
22 #include "cmdhf.h"
23 #include "cmdhf14a.h"
24 #include "cmdhf14b.h"
25 #include "cmdhf15.h"
26 #include "cmdhfepa.h"
27 #include "cmdhflegic.h"
28 #include "cmdhficlass.h"
29 #include "cmdhfmf.h"
30 #include "cmdhfmfu.h"
31 #include "cmdhftopaz.h"
32 #include "protocols.h"
33 #include "emv/cmdemv.h"
34 #include "cmdhflist.h"
35
36 static int CmdHelp(const char *Cmd);
37
38 int CmdHFTune(const char *Cmd)
39 {
40 UsbCommand c={CMD_MEASURE_ANTENNA_TUNING_HF};
41 SendCommand(&c);
42 return 0;
43 }
44
45 /**
46 * @brief iso14443B_CRC_check Checks CRC in command or response
47 * @param isResponse
48 * @param data
49 * @param len
50 * @return 0 : CRC-command, CRC not ok
51 * 1 : CRC-command, CRC ok
52 * 2 : Not crc-command
53 */
54
55 uint8_t iso14443B_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
56 {
57 uint8_t b1,b2;
58
59 if(len <= 2) return 2;
60
61 ComputeCrc14443(CRC_14443_B, data, len-2, &b1, &b2);
62 if(b1 != data[len-2] || b2 != data[len-1]) {
63 return 0;
64 } else {
65 return 1;
66 }
67 }
68
69 /**
70 * @brief iclass_CRC_Ok Checks CRC in command or response
71 * @param isResponse
72 * @param data
73 * @param len
74 * @return 0 : CRC-command, CRC not ok
75 * 1 : CRC-command, CRC ok
76 * 2 : Not crc-command
77 */
78 uint8_t iclass_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
79 {
80 if(len < 4) return 2;//CRC commands (and responses) are all at least 4 bytes
81
82 uint8_t b1, b2;
83
84 if(!isResponse)//Commands to tag
85 {
86 /**
87 These commands should have CRC. Total length leftmost
88 4 READ
89 4 READ4
90 12 UPDATE - unsecured, ends with CRC16
91 14 UPDATE - secured, ends with signature instead
92 4 PAGESEL
93 **/
94 if(len == 4 || len == 12)//Covers three of them
95 {
96 //Don't include the command byte
97 ComputeCrc14443(CRC_ICLASS, (data+1), len-3, &b1, &b2);
98 return b1 == data[len -2] && b2 == data[len-1];
99 }
100 return 2;
101 }else{
102 /**
103 These tag responses should have CRC. Total length leftmost
104
105 10 READ data[8] crc[2]
106 34 READ4 data[32]crc[2]
107 10 UPDATE data[8] crc[2]
108 10 SELECT csn[8] crc[2]
109 10 IDENTIFY asnb[8] crc[2]
110 10 PAGESEL block1[8] crc[2]
111 10 DETECT csn[8] crc[2]
112
113 These should not
114
115 4 CHECK chip_response[4]
116 8 READCHECK data[8]
117 1 ACTALL sof[1]
118 1 ACT sof[1]
119
120 In conclusion, without looking at the command; any response
121 of length 10 or 34 should have CRC
122 **/
123 if(len != 10 && len != 34) return true;
124
125 ComputeCrc14443(CRC_ICLASS, data, len-2, &b1, &b2);
126 return b1 == data[len -2] && b2 == data[len-1];
127 }
128 }
129
130
131 bool is_last_record(uint16_t tracepos, uint8_t *trace, uint16_t traceLen)
132 {
133 return(tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) >= traceLen);
134 }
135
136
137 bool next_record_is_response(uint16_t tracepos, uint8_t *trace)
138 {
139 uint16_t next_records_datalen = *((uint16_t *)(trace + tracepos + sizeof(uint32_t) + sizeof(uint16_t)));
140
141 return(next_records_datalen & 0x8000);
142 }
143
144
145 bool merge_topaz_reader_frames(uint32_t timestamp, uint32_t *duration, uint16_t *tracepos, uint16_t traceLen, uint8_t *trace, uint8_t *frame, uint8_t *topaz_reader_command, uint16_t *data_len)
146 {
147
148 #define MAX_TOPAZ_READER_CMD_LEN 16
149
150 uint32_t last_timestamp = timestamp + *duration;
151
152 if ((*data_len != 1) || (frame[0] == TOPAZ_WUPA) || (frame[0] == TOPAZ_REQA)) return false;
153
154 memcpy(topaz_reader_command, frame, *data_len);
155
156 while (!is_last_record(*tracepos, trace, traceLen) && !next_record_is_response(*tracepos, trace)) {
157 uint32_t next_timestamp = *((uint32_t *)(trace + *tracepos));
158 *tracepos += sizeof(uint32_t);
159 uint16_t next_duration = *((uint16_t *)(trace + *tracepos));
160 *tracepos += sizeof(uint16_t);
161 uint16_t next_data_len = *((uint16_t *)(trace + *tracepos)) & 0x7FFF;
162 *tracepos += sizeof(uint16_t);
163 uint8_t *next_frame = (trace + *tracepos);
164 *tracepos += next_data_len;
165 if ((next_data_len == 1) && (*data_len + next_data_len <= MAX_TOPAZ_READER_CMD_LEN)) {
166 memcpy(topaz_reader_command + *data_len, next_frame, next_data_len);
167 *data_len += next_data_len;
168 last_timestamp = next_timestamp + next_duration;
169 } else {
170 // rewind and exit
171 *tracepos = *tracepos - next_data_len - sizeof(uint16_t) - sizeof(uint16_t) - sizeof(uint32_t);
172 break;
173 }
174 uint16_t next_parity_len = (next_data_len-1)/8 + 1;
175 *tracepos += next_parity_len;
176 }
177
178 *duration = last_timestamp - timestamp;
179
180 return true;
181 }
182
183
184 uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, uint8_t protocol, bool showWaitCycles, bool markCRCBytes)
185 {
186 bool isResponse;
187 uint16_t data_len, parity_len;
188 uint32_t duration;
189 uint8_t topaz_reader_command[9];
190 uint32_t timestamp, first_timestamp, EndOfTransmissionTimestamp;
191 char explanation[30] = {0};
192 uint8_t mfData[32] = {0};
193 size_t mfDataLen = 0;
194
195 if (tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) > traceLen) return traceLen;
196
197 first_timestamp = *((uint32_t *)(trace));
198 timestamp = *((uint32_t *)(trace + tracepos));
199
200 tracepos += 4;
201 duration = *((uint16_t *)(trace + tracepos));
202 tracepos += 2;
203 data_len = *((uint16_t *)(trace + tracepos));
204 tracepos += 2;
205
206 if (data_len & 0x8000) {
207 data_len &= 0x7fff;
208 isResponse = true;
209 } else {
210 isResponse = false;
211 }
212 parity_len = (data_len-1)/8 + 1;
213
214 if (tracepos + data_len + parity_len > traceLen) {
215 return traceLen;
216 }
217 uint8_t *frame = trace + tracepos;
218 tracepos += data_len;
219 uint8_t *parityBytes = trace + tracepos;
220 tracepos += parity_len;
221
222 if (protocol == TOPAZ && !isResponse) {
223 // topaz reader commands come in 1 or 9 separate frames with 7 or 8 Bits each.
224 // merge them:
225 if (merge_topaz_reader_frames(timestamp, &duration, &tracepos, traceLen, trace, frame, topaz_reader_command, &data_len)) {
226 frame = topaz_reader_command;
227 }
228 }
229
230 //Check the CRC status
231 uint8_t crcStatus = 2;
232
233 if (data_len > 2) {
234 switch (protocol) {
235 case ICLASS:
236 crcStatus = iclass_CRC_check(isResponse, frame, data_len);
237 break;
238 case ISO_14443B:
239 case TOPAZ:
240 crcStatus = iso14443B_CRC_check(isResponse, frame, data_len);
241 break;
242 case PROTO_MIFARE:
243 crcStatus = mifare_CRC_check(isResponse, frame, data_len);
244 break;
245 case ISO_14443A:
246 crcStatus = iso14443A_CRC_check(isResponse, frame, data_len);
247 break;
248 default:
249 break;
250 }
251 }
252 //0 CRC-command, CRC not ok
253 //1 CRC-command, CRC ok
254 //2 Not crc-command
255
256 //--- Draw the data column
257 //char line[16][110];
258 char line[16][110];
259
260 for (int j = 0; j < data_len && j/16 < 16; j++) {
261
262 uint8_t parityBits = parityBytes[j>>3];
263 if (protocol != ISO_14443B && (isResponse || protocol == ISO_14443A) && (oddparity8(frame[j]) != ((parityBits >> (7-(j&0x0007))) & 0x01))) {
264 snprintf(line[j/16]+(( j % 16) * 4),110, "%02x! ", frame[j]);
265 } else {
266 snprintf(line[j/16]+(( j % 16) * 4), 110, " %02x ", frame[j]);
267 }
268
269 }
270
271 if (markCRCBytes) {
272 if(crcStatus == 0 || crcStatus == 1)
273 {//CRC-command
274 char *pos1 = line[(data_len-2)/16]+(((data_len-2) % 16) * 4);
275 (*pos1) = '[';
276 char *pos2 = line[(data_len)/16]+(((data_len) % 16) * 4);
277 sprintf(pos2, "%c", ']');
278 }
279 }
280
281 if(data_len == 0)
282 {
283 if(data_len == 0){
284 sprintf(line[0],"<empty trace - possible error>");
285 }
286 }
287 //--- Draw the CRC column
288
289 char *crc = (crcStatus == 0 ? "!crc" : (crcStatus == 1 ? " ok " : " "));
290
291 EndOfTransmissionTimestamp = timestamp + duration;
292
293 if (protocol == PROTO_MIFARE)
294 annotateMifare(explanation, sizeof(explanation), frame, data_len, parityBytes, parity_len, isResponse);
295
296 if(!isResponse)
297 {
298 switch(protocol) {
299 case ICLASS: annotateIclass(explanation,sizeof(explanation),frame,data_len); break;
300 case ISO_14443A: annotateIso14443a(explanation,sizeof(explanation),frame,data_len); break;
301 case ISO_14443B: annotateIso14443b(explanation,sizeof(explanation),frame,data_len); break;
302 case TOPAZ: annotateTopaz(explanation,sizeof(explanation),frame,data_len); break;
303 default: break;
304 }
305 }
306
307 int num_lines = MIN((data_len - 1)/16 + 1, 16);
308 for (int j = 0; j < num_lines ; j++) {
309 if (j == 0) {
310 PrintAndLog(" %10d | %10d | %s |%-64s | %s| %s",
311 (timestamp - first_timestamp),
312 (EndOfTransmissionTimestamp - first_timestamp),
313 (isResponse ? "Tag" : "Rdr"),
314 line[j],
315 (j == num_lines-1) ? crc : " ",
316 (j == num_lines-1) ? explanation : "");
317 } else {
318 PrintAndLog(" | | |%-64s | %s| %s",
319 line[j],
320 (j == num_lines-1) ? crc : " ",
321 (j == num_lines-1) ? explanation : "");
322 }
323 }
324
325 if (DecodeMifareData(frame, data_len, parityBytes, isResponse, mfData, &mfDataLen)) {
326 memset(explanation, 0x00, sizeof(explanation));
327 if (!isResponse) {
328 explanation[0] = '>';
329 annotateIso14443a(&explanation[1], sizeof(explanation) - 1, mfData, mfDataLen);
330 }
331 uint8_t crcc = iso14443A_CRC_check(isResponse, mfData, mfDataLen);
332 PrintAndLog(" | * | dec |%-64s | %-4s| %s",
333 sprint_hex(mfData, mfDataLen),
334 (crcc == 0 ? "!crc" : (crcc == 1 ? " ok " : " ")),
335 (true) ? explanation : "");
336 };
337
338 if (is_last_record(tracepos, trace, traceLen)) return traceLen;
339
340 if (showWaitCycles && !isResponse && next_record_is_response(tracepos, trace)) {
341 uint32_t next_timestamp = *((uint32_t *)(trace + tracepos));
342 PrintAndLog(" %10d | %10d | %s | fdt (Frame Delay Time): %d",
343 (EndOfTransmissionTimestamp - first_timestamp),
344 (next_timestamp - first_timestamp),
345 " ",
346 (next_timestamp - EndOfTransmissionTimestamp));
347 }
348
349 return tracepos;
350 }
351
352
353 int CmdHFList(const char *Cmd)
354 {
355 bool showWaitCycles = false;
356 bool markCRCBytes = false;
357 bool loadFromFile = false;
358 bool saveToFile = false;
359 char param1 = '\0';
360 char param2 = '\0';
361 char param3 = '\0';
362 char type[40] = {0};
363 char filename[FILE_PATH_SIZE];
364 uint8_t protocol = 0;
365
366 // parse command line
367 int tlen = param_getstr(Cmd, 0, type, sizeof(type));
368 if (param_getlength(Cmd, 1) == 1) {
369 param1 = param_getchar(Cmd, 1);
370 } else {
371 param_getstr(Cmd, 1, filename, sizeof(filename));
372 }
373 if (param_getlength(Cmd, 2) == 1) {
374 param2 = param_getchar(Cmd, 2);
375 } else if (strlen(filename) == 0) {
376 param_getstr(Cmd, 2, filename, sizeof(filename));
377 }
378 if (param_getlength(Cmd, 3) == 1) {
379 param3 = param_getchar(Cmd, 3);
380 } else if (strlen(filename) == 0) {
381 param_getstr(Cmd, 3, filename, sizeof(filename));
382 }
383
384 // Validate param1
385 bool errors = false;
386
387 if(tlen == 0) {
388 errors = true;
389 }
390
391 if(param1 == 'h'
392 || (param1 != 0 && param1 != 'f' && param1 != 'c' && param1 != 'l')
393 || (param2 != 0 && param2 != 'f' && param2 != 'c' && param2 != 'l')
394 || (param3 != 0 && param3 != 'f' && param3 != 'c' && param3 != 'l')) {
395 errors = true;
396 }
397
398 if(!errors) {
399 if(strcmp(type, "iclass") == 0) {
400 protocol = ICLASS;
401 } else if(strcmp(type, "mf") == 0) {
402 protocol = PROTO_MIFARE;
403 } else if(strcmp(type, "14a") == 0) {
404 protocol = ISO_14443A;
405 } else if(strcmp(type, "14b") == 0) {
406 protocol = ISO_14443B;
407 } else if(strcmp(type,"topaz") == 0) {
408 protocol = TOPAZ;
409 } else if(strcmp(type,"raw") == 0) {
410 protocol = -1; //No crc, no annotations
411 } else if (strcmp(type, "save") == 0) {
412 saveToFile = true;
413 } else {
414 errors = true;
415 }
416 }
417
418 if (param1 == 'f' || param2 == 'f' || param3 == 'f') {
419 showWaitCycles = true;
420 }
421
422 if (param1 == 'c' || param2 == 'c' || param3 == 'c') {
423 markCRCBytes = true;
424 }
425
426 if (param1 == 'l' || param2 == 'l' || param3 == 'l') {
427 loadFromFile = true;
428 }
429
430 if ((loadFromFile || saveToFile) && strlen(filename) == 0) {
431 errors = true;
432 }
433
434 if (loadFromFile && saveToFile) {
435 errors = true;
436 }
437
438 if (errors) {
439 PrintAndLog("List or save protocol data.");
440 PrintAndLog("Usage: hf list <protocol> [f] [c] [l <filename>]");
441 PrintAndLog(" hf list save <filename>");
442 PrintAndLog(" f - show frame delay times as well");
443 PrintAndLog(" c - mark CRC bytes");
444 PrintAndLog(" l - load data from file instead of trace buffer");
445 PrintAndLog(" save - save data to file");
446 PrintAndLog("Supported <protocol> values:");
447 PrintAndLog(" raw - just show raw data without annotations");
448 PrintAndLog(" 14a - interpret data as iso14443a communications");
449 PrintAndLog(" mf - interpret data as iso14443a communications and decrypt crypto1 stream");
450 PrintAndLog(" 14b - interpret data as iso14443b communications");
451 PrintAndLog(" iclass - interpret data as iclass communications");
452 PrintAndLog(" topaz - interpret data as topaz communications");
453 PrintAndLog("");
454 PrintAndLog("example: hf list 14a f");
455 PrintAndLog("example: hf list iclass");
456 PrintAndLog("example: hf list save myCardTrace.trc");
457 PrintAndLog("example: hf list 14a l myCardTrace.trc");
458 return 0;
459 }
460
461
462 uint8_t *trace;
463 uint32_t tracepos = 0;
464 uint32_t traceLen = 0;
465
466 if (loadFromFile) {
467 #define TRACE_CHUNK_SIZE (1<<16) // 64K to start with. Will be enough for BigBuf and some room for future extensions
468 FILE *tracefile = NULL;
469 size_t bytes_read;
470 trace = malloc(TRACE_CHUNK_SIZE);
471 if (trace == NULL) {
472 PrintAndLog("Cannot allocate memory for trace");
473 return 2;
474 }
475 if ((tracefile = fopen(filename,"rb")) == NULL) {
476 PrintAndLog("Could not open file %s", filename);
477 free(trace);
478 return 0;
479 }
480 while (!feof(tracefile)) {
481 bytes_read = fread(trace+traceLen, 1, TRACE_CHUNK_SIZE, tracefile);
482 traceLen += bytes_read;
483 if (!feof(tracefile)) {
484 uint8_t *p = realloc(trace, traceLen + TRACE_CHUNK_SIZE);
485 if (p == NULL) {
486 PrintAndLog("Cannot allocate memory for trace");
487 free(trace);
488 fclose(tracefile);
489 return 2;
490 }
491 trace = p;
492 }
493 }
494 fclose(tracefile);
495 } else {
496 trace = malloc(USB_CMD_DATA_SIZE);
497 // Query for the size of the trace
498 UsbCommand response;
499 GetFromBigBuf(trace, USB_CMD_DATA_SIZE, 0, &response, -1, false);
500 traceLen = response.arg[2];
501 if (traceLen > USB_CMD_DATA_SIZE) {
502 uint8_t *p = realloc(trace, traceLen);
503 if (p == NULL) {
504 PrintAndLog("Cannot allocate memory for trace");
505 free(trace);
506 return 2;
507 }
508 trace = p;
509 GetFromBigBuf(trace, traceLen, 0, NULL, -1, false);
510 }
511 }
512
513 if (saveToFile) {
514 FILE *tracefile = NULL;
515 if ((tracefile = fopen(filename,"wb")) == NULL) {
516 PrintAndLog("Could not create file %s", filename);
517 return 1;
518 }
519 fwrite(trace, 1, traceLen, tracefile);
520 PrintAndLog("Recorded Activity (TraceLen = %d bytes) written to file %s", traceLen, filename);
521 fclose(tracefile);
522 } else {
523 PrintAndLog("Recorded Activity (TraceLen = %d bytes)", traceLen);
524 PrintAndLog("");
525 PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
526 PrintAndLog("iso14443a - All times are in carrier periods (1/13.56Mhz)");
527 PrintAndLog("iClass - Timings are not as accurate");
528 PrintAndLog("");
529 PrintAndLog(" Start | End | Src | Data (! denotes parity error) | CRC | Annotation |");
530 PrintAndLog("------------|------------|-----|-----------------------------------------------------------------|-----|--------------------|");
531
532 ClearAuthData();
533 while(tracepos < traceLen)
534 {
535 tracepos = printTraceLine(tracepos, traceLen, trace, protocol, showWaitCycles, markCRCBytes);
536 }
537 }
538
539 free(trace);
540 return 0;
541 }
542
543 int CmdHFSearch(const char *Cmd){
544 int ans = 0;
545 PrintAndLog("");
546 ans = CmdHF14AInfo("s");
547 if (ans > 0) {
548 PrintAndLog("\nValid ISO14443A Tag Found - Quiting Search\n");
549 return ans;
550 }
551 ans = HFiClassReader("", false, false);
552 if (ans) {
553 PrintAndLog("\nValid iClass Tag (or PicoPass Tag) Found - Quiting Search\n");
554 return ans;
555 }
556 ans = HF15Reader("", false);
557 if (ans) {
558 PrintAndLog("\nValid ISO15693 Tag Found - Quiting Search\n");
559 return ans;
560 }
561 //14b is longest test currently (and rarest chip type) ... put last
562 ans = HF14BInfo(false);
563 if (ans) {
564 PrintAndLog("\nValid ISO14443B Tag Found - Quiting Search\n");
565 return ans;
566 }
567 PrintAndLog("\nno known/supported 13.56 MHz tags found\n");
568 return 0;
569 }
570
571 int CmdHFSnoop(const char *Cmd)
572 {
573 char * pEnd;
574 UsbCommand c = {CMD_HF_SNIFFER, {strtol(Cmd, &pEnd,0),strtol(pEnd, &pEnd,0),0}};
575 SendCommand(&c);
576 return 0;
577 }
578
579 static command_t CommandTable[] =
580 {
581 {"help", CmdHelp, 1, "This help"},
582 {"14a", CmdHF14A, 1, "{ ISO14443A RFIDs... }"},
583 {"14b", CmdHF14B, 1, "{ ISO14443B RFIDs... }"},
584 {"15", CmdHF15, 1, "{ ISO15693 RFIDs... }"},
585 {"epa", CmdHFEPA, 1, "{ German Identification Card... }"},
586 {"emv", CmdHFEMV, 1, "{ EMV cards... }"},
587 {"legic", CmdHFLegic, 0, "{ LEGIC RFIDs... }"},
588 {"iclass", CmdHFiClass, 1, "{ ICLASS RFIDs... }"},
589 {"mf", CmdHFMF, 1, "{ MIFARE RFIDs... }"},
590 {"mfu", CmdHFMFUltra, 1, "{ MIFARE Ultralight RFIDs... }"},
591 {"topaz", CmdHFTopaz, 1, "{ TOPAZ (NFC Type 1) RFIDs... }"},
592 {"tune", CmdHFTune, 0, "Continuously measure HF antenna tuning"},
593 {"list", CmdHFList, 1, "List protocol data in trace buffer"},
594 {"search", CmdHFSearch, 1, "Search for known HF tags [preliminary]"},
595 {"snoop", CmdHFSnoop, 0, "<samples to skip (10000)> <triggers to skip (1)> Generic HF Snoop"},
596 {NULL, NULL, 0, NULL}
597 };
598
599 int CmdHF(const char *Cmd)
600 {
601 CmdsParse(CommandTable, Cmd);
602 return 0;
603 }
604
605 int CmdHelp(const char *Cmd)
606 {
607 CmdsHelp(CommandTable);
608 return 0;
609 }
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