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1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>, Hagen Fritsch
3 // Copyright (C) 2011 Gerhard de Koning Gans
4 // Copyright (C) 2014 Midnitesnake & Andy Davies & Martin Holst Swende
5 //
6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
7 // at your option, any later version. See the LICENSE.txt file for the text of
8 // the license.
9 //-----------------------------------------------------------------------------
10 // High frequency iClass commands
11 //-----------------------------------------------------------------------------
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <sys/stat.h>
17 #include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
18 #include "data.h"
19 //#include "proxusb.h"
20 #include "proxmark3.h"
21 #include "ui.h"
22 #include "cmdparser.h"
23 #include "cmdhficlass.h"
24 #include "common.h"
25 #include "util.h"
26 #include "cmdmain.h"
27 #include "loclass/des.h"
28 #include "loclass/cipherutils.h"
29 #include "loclass/cipher.h"
30 #include "loclass/ikeys.h"
31 #include "loclass/elite_crack.h"
32 #include "loclass/fileutils.h"
33
34 static int CmdHelp(const char *Cmd);
35
36 int xorbits_8(uint8_t val)
37 {
38 uint8_t res = val ^ (val >> 1); //1st pass
39 res = res ^ (res >> 1); // 2nd pass
40 res = res ^ (res >> 2); // 3rd pass
41 res = res ^ (res >> 4); // 4th pass
42 return res & 1;
43 }
44
45 int CmdHFiClassList(const char *Cmd)
46 {
47
48 bool ShowWaitCycles = false;
49 char param = param_getchar(Cmd, 0);
50
51 if (param != 0) {
52 PrintAndLog("List data in trace buffer.");
53 PrintAndLog("Usage: hf iclass list");
54 PrintAndLog("h - help");
55 PrintAndLog("sample: hf iclass list");
56 return 0;
57 }
58
59 uint8_t got[1920];
60 GetFromBigBuf(got,sizeof(got),0);
61 WaitForResponse(CMD_ACK,NULL);
62
63 PrintAndLog("Recorded Activity");
64 PrintAndLog("");
65 PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
66 PrintAndLog("All times are in carrier periods (1/13.56Mhz)");
67 PrintAndLog("");
68 PrintAndLog(" Start | End | Src | Data");
69 PrintAndLog("-----------|-----------|-----|--------");
70
71 int i;
72 uint32_t first_timestamp = 0;
73 uint32_t timestamp;
74 bool tagToReader;
75 uint32_t parityBits;
76 uint8_t len;
77 uint8_t *frame;
78 uint32_t EndOfTransmissionTimestamp = 0;
79
80
81 for( i=0; i < 1900;)
82 {
83 //First 32 bits contain
84 // isResponse (1 bit)
85 // timestamp (remaining)
86 //Then paritybits
87 //Then length
88 timestamp = *((uint32_t *)(got+i));
89 parityBits = *((uint32_t *)(got+i+4));
90 len = got[i+8];
91 frame = (got+i+9);
92 uint32_t next_timestamp = (*((uint32_t *)(got+i+9))) & 0x7fffffff;
93
94 tagToReader = timestamp & 0x80000000;
95 timestamp &= 0x7fffffff;
96
97 if(i==0) {
98 first_timestamp = timestamp;
99 }
100
101 // Break and stick with current result idf buffer was not completely full
102 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
103
104 char line[1000] = "";
105
106 if(len)//We have some data to display
107 {
108 int j,oddparity;
109
110 for(j = 0; j < len ; j++)
111 {
112 oddparity = 0x01 ^ xorbits_8(frame[j] & 0xFF);
113
114 if (tagToReader && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
115 sprintf(line+(j*4), "%02x! ", frame[j]);
116 } else {
117 sprintf(line+(j*4), "%02x ", frame[j]);
118 }
119 }
120 }else
121 {
122 if (ShowWaitCycles) {
123 sprintf(line, "fdt (Frame Delay Time): %d", (next_timestamp - timestamp));
124 }
125 }
126
127 char *crc = "";
128
129 if(len > 2)
130 {
131 uint8_t b1, b2;
132 if(!tagToReader && len == 4) {
133 // Rough guess that this is a command from the reader
134 // For iClass the command byte is not part of the CRC
135 ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
136 }
137 else {
138 // For other data.. CRC might not be applicable (UPDATE commands etc.)
139 ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
140 }
141
142 if (b1 != frame[len-2] || b2 != frame[len-1]) {
143 crc = (tagToReader & (len < 8)) ? "" : " !crc";
144 }
145 }
146
147 i += (len + 9);
148 EndOfTransmissionTimestamp = (*((uint32_t *)(got+i))) & 0x7fffffff;
149
150 // Not implemented for iclass on the ARM-side
151 //if (!ShowWaitCycles) i += 9;
152
153 PrintAndLog(" %9d | %9d | %s | %s %s",
154 (timestamp - first_timestamp),
155 (EndOfTransmissionTimestamp - first_timestamp),
156 (len?(tagToReader ? "Tag" : "Rdr"):" "),
157 line, crc);
158 }
159 return 0;
160 }
161
162 int CmdHFiClassListOld(const char *Cmd)
163 {
164 uint8_t got[1920];
165 GetFromBigBuf(got,sizeof(got),0);
166
167 PrintAndLog("recorded activity:");
168 PrintAndLog(" ETU :rssi: who bytes");
169 PrintAndLog("---------+----+----+-----------");
170
171 int i = 0;
172 int prev = -1;
173
174 for (;;) {
175 if(i >= 1900) {
176 break;
177 }
178
179 bool isResponse;
180 int timestamp = *((uint32_t *)(got+i));
181 if (timestamp & 0x80000000) {
182 timestamp &= 0x7fffffff;
183 isResponse = 1;
184 } else {
185 isResponse = 0;
186 }
187
188
189 int metric = 0;
190
191 int parityBits = *((uint32_t *)(got+i+4));
192 // 4 bytes of additional information...
193 // maximum of 32 additional parity bit information
194 //
195 // TODO:
196 // at each quarter bit period we can send power level (16 levels)
197 // or each half bit period in 256 levels.
198
199
200 int len = got[i+8];
201
202 if (len > 100) {
203 break;
204 }
205 if (i + len >= 1900) {
206 break;
207 }
208
209 uint8_t *frame = (got+i+9);
210
211 // Break and stick with current result if buffer was not completely full
212 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
213
214 char line[1000] = "";
215 int j;
216 for (j = 0; j < len; j++) {
217 int oddparity = 0x01;
218 int k;
219
220 for (k=0;k<8;k++) {
221 oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
222 }
223
224 //if((parityBits >> (len - j - 1)) & 0x01) {
225 if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
226 sprintf(line+(j*4), "%02x! ", frame[j]);
227 }
228 else {
229 sprintf(line+(j*4), "%02x ", frame[j]);
230 }
231 }
232
233 char *crc;
234 crc = "";
235 if (len > 2) {
236 uint8_t b1, b2;
237 for (j = 0; j < (len - 1); j++) {
238 // gives problems... search for the reason..
239 /*if(frame[j] == 0xAA) {
240 switch(frame[j+1]) {
241 case 0x01:
242 crc = "[1] Two drops close after each other";
243 break;
244 case 0x02:
245 crc = "[2] Potential SOC with a drop in second half of bitperiod";
246 break;
247 case 0x03:
248 crc = "[3] Segment Z after segment X is not possible";
249 break;
250 case 0x04:
251 crc = "[4] Parity bit of a fully received byte was wrong";
252 break;
253 default:
254 crc = "[?] Unknown error";
255 break;
256 }
257 break;
258 }*/
259 }
260
261 if (strlen(crc)==0) {
262 if(!isResponse && len == 4) {
263 // Rough guess that this is a command from the reader
264 // For iClass the command byte is not part of the CRC
265 ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
266 }
267 else {
268 // For other data.. CRC might not be applicable (UPDATE commands etc.)
269 ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
270 }
271 //printf("%1x %1x",(unsigned)b1,(unsigned)b2);
272 if (b1 != frame[len-2] || b2 != frame[len-1]) {
273 crc = (isResponse & (len < 8)) ? "" : " !crc";
274 } else {
275 crc = "";
276 }
277 }
278 } else {
279 crc = ""; // SHORT
280 }
281
282 char metricString[100];
283 if (isResponse) {
284 sprintf(metricString, "%3d", metric);
285 } else {
286 strcpy(metricString, " ");
287 }
288
289 PrintAndLog(" +%7d: %s: %s %s %s",
290 (prev < 0 ? 0 : (timestamp - prev)),
291 metricString,
292 (isResponse ? "TAG" : " "), line, crc);
293
294 prev = timestamp;
295 i += (len + 9);
296 }
297 return 0;
298 }
299
300 int CmdHFiClassSnoop(const char *Cmd)
301 {
302 UsbCommand c = {CMD_SNOOP_ICLASS};
303 SendCommand(&c);
304 return 0;
305 }
306
307 int CmdHFiClassSim(const char *Cmd)
308 {
309 uint8_t simType = 0;
310 uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
311
312 if (strlen(Cmd)<1) {
313 PrintAndLog("Usage: hf iclass sim [0 <CSN>] | x");
314 PrintAndLog(" options");
315 PrintAndLog(" 0 <CSN> simulate the given CSN");
316 PrintAndLog(" 1 simulate default CSN");
317 PrintAndLog(" 2 iterate CSNs, gather MACs");
318 PrintAndLog(" sample: hf iclass sim 0 031FEC8AF7FF12E0");
319 PrintAndLog(" sample: hf iclass sim 2");
320 return 0;
321 }
322
323 simType = param_get8(Cmd, 0);
324
325 if(simType == 0)
326 {
327 if (param_gethex(Cmd, 1, CSN, 16)) {
328 PrintAndLog("A CSN should consist of 16 HEX symbols");
329 return 1;
330 }
331 PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
332
333 }
334 if(simType > 2)
335 {
336 PrintAndLog("Undefined simptype %d", simType);
337 return 1;
338 }
339 uint8_t numberOfCSNs=0;
340
341 if(simType == 2)
342 {
343 UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,63}};
344 UsbCommand resp = {0};
345
346 uint8_t csns[64] = {
347 0x00,0x0B,0x0F,0xFF,0xF7,0xFF,0x12,0xE0 ,
348 0x00,0x13,0x94,0x7e,0x76,0xff,0x12,0xe0 ,
349 0x2a,0x99,0xac,0x79,0xec,0xff,0x12,0xe0 ,
350 0x17,0x12,0x01,0xfd,0xf7,0xff,0x12,0xe0 ,
351 0xcd,0x56,0x01,0x7c,0x6f,0xff,0x12,0xe0 ,
352 0x4b,0x5e,0x0b,0x72,0xef,0xff,0x12,0xe0 ,
353 0x00,0x73,0xd8,0x75,0x58,0xff,0x12,0xe0 ,
354 0x0c,0x90,0x32,0xf3,0x5d,0xff,0x12,0xe0 };
355
356 memcpy(c.d.asBytes, csns, 64);
357
358 SendCommand(&c);
359 if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
360 PrintAndLog("Command timed out");
361 return 0;
362 }
363
364 uint8_t num_mac_responses = resp.arg[1];
365 PrintAndLog("Mac responses: %d MACs obtained (should be 8)", num_mac_responses);
366
367 size_t datalen = 8*24;
368 /*
369 * Now, time to dump to file. We'll use this format:
370 * <8-byte CSN><8-byte CC><4 byte NR><4 byte MAC>....
371 * So, it should wind up as
372 * 8 * 24 bytes.
373 *
374 * The returndata from the pm3 is on the following format
375 * <4 byte NR><4 byte MAC>
376 * CC are all zeroes, CSN is the same as was sent in
377 **/
378 void* dump = malloc(datalen);
379 memset(dump,0,datalen);//<-- Need zeroes for the CC-field
380 uint8_t i = 0;
381 for(i = 0 ; i < 8 ; i++)
382 {
383 memcpy(dump+i*24, csns+i*8,8); //CSN
384 //8 zero bytes here...
385 //Then comes NR_MAC (eight bytes from the response)
386 memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
387
388 }
389 /** Now, save to dumpfile **/
390 saveFile("iclass_mac_attack", "bin", dump,datalen);
391 free(dump);
392 }else
393 {
394 UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
395 memcpy(c.d.asBytes, CSN, 8);
396 SendCommand(&c);
397 }
398
399 return 0;
400 }
401
402 int CmdHFiClassReader(const char *Cmd)
403 {
404 UsbCommand c = {CMD_READER_ICLASS, {0}};
405 SendCommand(&c);
406 UsbCommand resp;
407 while(!ukbhit()){
408 if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
409 uint8_t isOK = resp.arg[0] & 0xff;
410 uint8_t * data = resp.d.asBytes;
411
412 PrintAndLog("isOk:%02x", isOK);
413
414 if(isOK > 0)
415 {
416 PrintAndLog("CSN: %s",sprint_hex(data,8));
417 }
418 if(isOK >= 1)
419 {
420 PrintAndLog("CC: %s",sprint_hex(data+8,8));
421 }else{
422 PrintAndLog("No CC obtained");
423 }
424 } else {
425 PrintAndLog("Command execute timeout");
426 }
427 }
428
429 return 0;
430 }
431
432 int CmdHFiClassReader_Replay(const char *Cmd)
433 {
434 uint8_t readerType = 0;
435 uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00};
436
437 if (strlen(Cmd)<1) {
438 PrintAndLog("Usage: hf iclass replay <MAC>");
439 PrintAndLog(" sample: hf iclass replay 00112233");
440 return 0;
441 }
442
443 if (param_gethex(Cmd, 0, MAC, 8)) {
444 PrintAndLog("MAC must include 8 HEX symbols");
445 return 1;
446 }
447
448 UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
449 memcpy(c.d.asBytes, MAC, 4);
450 SendCommand(&c);
451
452 return 0;
453 }
454
455 int CmdHFiClassReader_Dump(const char *Cmd)
456 {
457 uint8_t readerType = 0;
458 uint8_t MAC[4]={0x00,0x00,0x00,0x00};
459 uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
460 uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
461 uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
462 //uint8_t CC_temp[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
463 uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
464 uint8_t keytable[128] = {0};
465 int elite = 0;
466 uint8_t *used_key;
467 int i;
468 if (strlen(Cmd)<1)
469 {
470 PrintAndLog("Usage: hf iclass dump <Key> [e]");
471 PrintAndLog(" Key - A 16 byte master key");
472 PrintAndLog(" e - If 'e' is specified, the key is interpreted as the 16 byte");
473 PrintAndLog(" Custom Key (KCus), which can be obtained via reader-attack");
474 PrintAndLog(" See 'hf iclass sim 2'. This key should be on iclass-format");
475 PrintAndLog(" sample: hf iclass dump 0011223344556677");
476
477
478 return 0;
479 }
480
481 if (param_gethex(Cmd, 0, KEY, 16))
482 {
483 PrintAndLog("KEY must include 16 HEX symbols");
484 return 1;
485 }
486
487 if (param_getchar(Cmd, 1) == 'e')
488 {
489 PrintAndLog("Elite switch on");
490 elite = 1;
491
492 //calc h2
493 hash2(KEY, keytable);
494 printarr_human_readable("keytable", keytable, 128);
495
496 }
497
498
499 UsbCommand c = {CMD_READER_ICLASS, {0}};
500 c.arg[0] = FLAG_ICLASS_READER_ONLY_ONCE;
501
502 SendCommand(&c);
503
504 UsbCommand resp;
505 uint8_t key_sel[8] = {0};
506 uint8_t key_sel_p[8] = { 0 };
507
508 if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
509 uint8_t isOK = resp.arg[0] & 0xff;
510 uint8_t * data = resp.d.asBytes;
511
512 memcpy(CSN,data,8);
513 memcpy(CCNR,data+8,8);
514
515 PrintAndLog("isOk:%02x", isOK);
516
517 if(isOK > 0)
518 {
519 PrintAndLog("CSN: %s",sprint_hex(CSN,8));
520 }
521 if(isOK > 1)
522 {
523 if(elite)
524 {
525 //Get the key index (hash1)
526 uint8_t key_index[8] = {0};
527
528 hash1(CSN, key_index);
529 printvar("hash1", key_index,8);
530 for(i = 0; i < 8 ; i++)
531 key_sel[i] = keytable[key_index[i]] & 0xFF;
532 printvar("k_sel", key_sel,8);
533 //Permute from iclass format to standard format
534 permutekey_rev(key_sel,key_sel_p);
535 used_key = key_sel_p;
536 }else{
537 //Perhaps this should also be permuted to std format?
538 // Something like the code below? I have no std system
539 // to test this with /Martin
540
541 //uint8_t key_sel_p[8] = { 0 };
542 //permutekey_rev(KEY,key_sel_p);
543 //used_key = key_sel_p;
544
545 used_key = KEY;
546
547 }
548 printvar("Used key",used_key,8);
549 diversifyKey(CSN,used_key, div_key);
550 printvar("Div key", div_key, 8);
551 printvar("CC_NR:",CCNR,12);
552 doMAC(CCNR,12,div_key, MAC);
553 printvar("MAC", MAC, 4);
554
555 UsbCommand d = {CMD_READER_ICLASS_REPLAY, {readerType}};
556 memcpy(d.d.asBytes, MAC, 4);
557 SendCommand(&d);
558
559 }else{
560 PrintAndLog("Failed to obtain CC! Aborting");
561 }
562 } else {
563 PrintAndLog("Command execute timeout");
564 }
565
566 return 0;
567 }
568
569 int CmdHFiClass_iso14443A_write(const char *Cmd)
570 {
571 uint8_t readerType = 0;
572 uint8_t MAC[4]={0x00,0x00,0x00,0x00};
573 uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
574 uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
575 uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
576 uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
577
578 uint8_t blockNo=0;
579 uint8_t bldata[8]={0};
580
581 if (strlen(Cmd)<3)
582 {
583 PrintAndLog("Usage: hf iclass write <Key> <Block> <Data>");
584 PrintAndLog(" sample: hf iclass write 0011223344556677 10 AAAAAAAAAAAAAAAA");
585 return 0;
586 }
587
588 if (param_gethex(Cmd, 0, KEY, 16))
589 {
590 PrintAndLog("KEY must include 16 HEX symbols");
591 return 1;
592 }
593
594 blockNo = param_get8(Cmd, 1);
595 if (blockNo>32)
596 {
597 PrintAndLog("Error: Maximum number of blocks is 32 for iClass 2K Cards!");
598 return 1;
599 }
600 if (param_gethex(Cmd, 2, bldata, 8))
601 {
602 PrintAndLog("Block data must include 8 HEX symbols");
603 return 1;
604 }
605
606 UsbCommand c = {CMD_ICLASS_ISO14443A_WRITE, {0}};
607 SendCommand(&c);
608 UsbCommand resp;
609
610 if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
611 uint8_t isOK = resp.arg[0] & 0xff;
612 uint8_t * data = resp.d.asBytes;
613
614 memcpy(CSN,data,8);
615 memcpy(CCNR,data+8,8);
616 PrintAndLog("DEBUG: %s",sprint_hex(CSN,8));
617 PrintAndLog("DEBUG: %s",sprint_hex(CCNR,8));
618 PrintAndLog("isOk:%02x", isOK);
619 } else {
620 PrintAndLog("Command execute timeout");
621 }
622
623 diversifyKey(CSN,KEY, div_key);
624
625 PrintAndLog("Div Key: %s",sprint_hex(div_key,8));
626 doMAC(CCNR, 12,div_key, MAC);
627
628 UsbCommand c2 = {CMD_ICLASS_ISO14443A_WRITE, {readerType,blockNo}};
629 memcpy(c2.d.asBytes, bldata, 8);
630 memcpy(c2.d.asBytes+8, MAC, 4);
631 SendCommand(&c2);
632
633 if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
634 uint8_t isOK = resp.arg[0] & 0xff;
635 uint8_t * data = resp.d.asBytes;
636
637 if (isOK)
638 PrintAndLog("isOk:%02x data:%s", isOK, sprint_hex(data, 4));
639 else
640 PrintAndLog("isOk:%02x", isOK);
641 } else {
642 PrintAndLog("Command execute timeout");
643 }
644 return 0;
645 }
646
647
648 static command_t CommandTable[] =
649 {
650 {"help", CmdHelp, 1, "This help"},
651 {"list", CmdHFiClassList, 0, "List iClass history"},
652 {"snoop", CmdHFiClassSnoop, 0, "Eavesdrop iClass communication"},
653 {"sim", CmdHFiClassSim, 0, "Simulate iClass tag"},
654 {"reader",CmdHFiClassReader, 0, "Read an iClass tag"},
655 {"replay",CmdHFiClassReader_Replay, 0, "Read an iClass tag via Reply Attack"},
656 {"dump", CmdHFiClassReader_Dump, 0, "Authenticate and Dump iClass tag"},
657 {"write", CmdHFiClass_iso14443A_write, 0, "Authenticate and Write iClass block"},
658 {NULL, NULL, 0, NULL}
659 };
660
661 int CmdHFiClass(const char *Cmd)
662 {
663 CmdsParse(CommandTable, Cmd);
664 return 0;
665 }
666
667 int CmdHelp(const char *Cmd)
668 {
669 CmdsHelp(CommandTable);
670 return 0;
671 }
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