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4f131b53 1//-----------------------------------------------------------------------------
2// Copyright (C) Merlok - 2017
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// Command: hf mf list. It shows data from arm buffer.
9//-----------------------------------------------------------------------------
10
11#include "cmdhflist.h"
12
13#include <stdlib.h>
14#include <stdio.h>
15#include <string.h>
6612a5a2 16#include <stdint.h>
17#include <stdbool.h>
18#include "util.h"
6612a5a2 19#include "ui.h"
20#include "iso14443crc.h"
21#include "parity.h"
22#include "protocols.h"
7b215d14
OM
23#include "crapto1/crapto1.h"
24#include "mifarehost.h"
c6a886fb 25#include "mifaredefault.h"
4f131b53 26
27
6612a5a2 28enum MifareAuthSeq {
29 masNone,
30 masNt,
31 masNrAr,
32 masAt,
747885a6 33 masAuthComplete,
aadc6bf1 34 masFirstData,
6612a5a2 35 masData,
6612a5a2 36 masError,
37};
38static enum MifareAuthSeq MifareAuthState;
aadc6bf1
OM
39static TAuthData AuthData;
40
41void ClearAuthData() {
42 AuthData.uid = 0;
43 AuthData.nt = 0;
7b215d14 44 AuthData.first_auth = true;
e01bc794
OM
45 AuthData.ks2 = 0;
46 AuthData.ks3 = 0;
aadc6bf1 47}
6612a5a2 48
49/**
50 * @brief iso14443A_CRC_check Checks CRC in command or response
51 * @param isResponse
52 * @param data
53 * @param len
54 * @return 0 : CRC-command, CRC not ok
55 * 1 : CRC-command, CRC ok
56 * 2 : Not crc-command
57 */
58uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
59{
60 uint8_t b1,b2;
61
62 if(len <= 2) return 2;
63
64 if(isResponse & (len < 6)) return 2;
65
66 ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
67 if (b1 != data[len-2] || b2 != data[len-1]) {
68 return 0;
69 } else {
70 return 1;
71 }
72}
73
74uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
75{
76 switch(MifareAuthState) {
77 case masNone:
6612a5a2 78 case masError:
79 return iso14443A_CRC_check(isResponse, data, len);
80 default:
81 return 2;
82 }
6612a5a2 83}
84
868deeb7 85void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
86{
87 switch(cmd[0])
88 {
89 case ICLASS_CMD_ACTALL: snprintf(exp,size,"ACTALL"); break;
90 case ICLASS_CMD_READ_OR_IDENTIFY:{
91 if(cmdsize > 1){
92 snprintf(exp,size,"READ(%d)",cmd[1]);
93 }else{
94 snprintf(exp,size,"IDENTIFY");
95 }
96 break;
97 }
98 case ICLASS_CMD_SELECT: snprintf(exp,size,"SELECT"); break;
99 case ICLASS_CMD_PAGESEL: snprintf(exp,size,"PAGESEL(%d)", cmd[1]); break;
100 case ICLASS_CMD_READCHECK_KC:snprintf(exp,size,"READCHECK[Kc](%d)", cmd[1]); break;
101 case ICLASS_CMD_READCHECK_KD:snprintf(exp,size,"READCHECK[Kd](%d)", cmd[1]); break;
102 case ICLASS_CMD_CHECK: snprintf(exp,size,"CHECK"); break;
103 case ICLASS_CMD_DETECT: snprintf(exp,size,"DETECT"); break;
104 case ICLASS_CMD_HALT: snprintf(exp,size,"HALT"); break;
105 case ICLASS_CMD_UPDATE: snprintf(exp,size,"UPDATE(%d)",cmd[1]); break;
106 case ICLASS_CMD_ACT: snprintf(exp,size,"ACT"); break;
107 case ICLASS_CMD_READ4: snprintf(exp,size,"READ4(%d)",cmd[1]); break;
108 default: snprintf(exp,size,"?"); break;
109 }
110 return;
111}
112
113void annotateIso15693(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
114{
115
116 if(cmd[0] == 0x26)
117 {
118 switch(cmd[1]){
119 case ISO15693_INVENTORY :snprintf(exp, size, "INVENTORY");break;
120 case ISO15693_STAYQUIET :snprintf(exp, size, "STAY_QUIET");break;
121 default: snprintf(exp,size,"?"); break;
122
123 }
124 }else if(cmd[0] == 0x02)
125 {
126 switch(cmd[1])
127 {
128 case ISO15693_READBLOCK :snprintf(exp, size, "READBLOCK");break;
129 case ISO15693_WRITEBLOCK :snprintf(exp, size, "WRITEBLOCK");break;
130 case ISO15693_LOCKBLOCK :snprintf(exp, size, "LOCKBLOCK");break;
131 case ISO15693_READ_MULTI_BLOCK :snprintf(exp, size, "READ_MULTI_BLOCK");break;
132 case ISO15693_SELECT :snprintf(exp, size, "SELECT");break;
133 case ISO15693_RESET_TO_READY :snprintf(exp, size, "RESET_TO_READY");break;
134 case ISO15693_WRITE_AFI :snprintf(exp, size, "WRITE_AFI");break;
135 case ISO15693_LOCK_AFI :snprintf(exp, size, "LOCK_AFI");break;
136 case ISO15693_WRITE_DSFID :snprintf(exp, size, "WRITE_DSFID");break;
137 case ISO15693_LOCK_DSFID :snprintf(exp, size, "LOCK_DSFID");break;
138 case ISO15693_GET_SYSTEM_INFO :snprintf(exp, size, "GET_SYSTEM_INFO");break;
139 case ISO15693_READ_MULTI_SECSTATUS :snprintf(exp, size, "READ_MULTI_SECSTATUS");break;
140 default: snprintf(exp,size,"?"); break;
141 }
142 }
143}
144
145
146void annotateTopaz(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
147{
148 switch(cmd[0]) {
149 case TOPAZ_REQA :snprintf(exp, size, "REQA");break;
150 case TOPAZ_WUPA :snprintf(exp, size, "WUPA");break;
151 case TOPAZ_RID :snprintf(exp, size, "RID");break;
152 case TOPAZ_RALL :snprintf(exp, size, "RALL");break;
153 case TOPAZ_READ :snprintf(exp, size, "READ");break;
154 case TOPAZ_WRITE_E :snprintf(exp, size, "WRITE-E");break;
155 case TOPAZ_WRITE_NE :snprintf(exp, size, "WRITE-NE");break;
156 case TOPAZ_RSEG :snprintf(exp, size, "RSEG");break;
157 case TOPAZ_READ8 :snprintf(exp, size, "READ8");break;
158 case TOPAZ_WRITE_E8 :snprintf(exp, size, "WRITE-E8");break;
159 case TOPAZ_WRITE_NE8 :snprintf(exp, size, "WRITE-NE8");break;
160 default: snprintf(exp,size,"?"); break;
161 }
162}
163
164
165/**
16606 00 = INITIATE
1670E xx = SELECT ID (xx = Chip-ID)
1680B = Get UID
16908 yy = Read Block (yy = block number)
17009 yy dd dd dd dd = Write Block (yy = block number; dd dd dd dd = data to be written)
1710C = Reset to Inventory
1720F = Completion
1730A 11 22 33 44 55 66 = Authenticate (11 22 33 44 55 66 = data to authenticate)
174**/
175
176void annotateIso14443b(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
177{
178 switch(cmd[0]){
179 case ISO14443B_REQB : snprintf(exp,size,"REQB");break;
180 case ISO14443B_ATTRIB : snprintf(exp,size,"ATTRIB");break;
181 case ISO14443B_HALT : snprintf(exp,size,"HALT");break;
182 case ISO14443B_INITIATE : snprintf(exp,size,"INITIATE");break;
183 case ISO14443B_SELECT : snprintf(exp,size,"SELECT(%d)",cmd[1]);break;
184 case ISO14443B_GET_UID : snprintf(exp,size,"GET UID");break;
185 case ISO14443B_READ_BLK : snprintf(exp,size,"READ_BLK(%d)", cmd[1]);break;
186 case ISO14443B_WRITE_BLK : snprintf(exp,size,"WRITE_BLK(%d)",cmd[1]);break;
187 case ISO14443B_RESET : snprintf(exp,size,"RESET");break;
188 case ISO14443B_COMPLETION : snprintf(exp,size,"COMPLETION");break;
189 case ISO14443B_AUTHENTICATE : snprintf(exp,size,"AUTHENTICATE");break;
190 default : snprintf(exp,size ,"?");break;
191 }
192
193}
194
6612a5a2 195void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
196{
197 switch(cmd[0])
198 {
a31f7f89
OM
199 case ISO14443A_CMD_WUPA:
200 snprintf(exp,size,"WUPA");
a31f7f89 201 break;
6612a5a2 202 case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
203 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
204 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
205 if(cmd[1] == 0x70)
206 {
207 snprintf(exp,size,"SELECT_UID"); break;
208 }else
209 {
210 snprintf(exp,size,"ANTICOLL"); break;
211 }
212 }
213 case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
214 //95 20 = Anticollision of cascade level2
215 //95 70 = Select of cascade level2
216 if(cmd[2] == 0x70)
217 {
218 snprintf(exp,size,"SELECT_UID-2"); break;
219 }else
220 {
221 snprintf(exp,size,"ANTICOLL-2"); break;
222 }
223 }
a31f7f89
OM
224 case ISO14443A_CMD_REQA:
225 snprintf(exp,size,"REQA");
a31f7f89 226 break;
6612a5a2 227 case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
228 case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
229 case ISO14443A_CMD_HALT:
230 snprintf(exp,size,"HALT");
231 MifareAuthState = masNone;
232 break;
233 case ISO14443A_CMD_RATS: snprintf(exp,size,"RATS"); break;
234 case MIFARE_CMD_INC: snprintf(exp,size,"INC(%d)",cmd[1]); break;
235 case MIFARE_CMD_DEC: snprintf(exp,size,"DEC(%d)",cmd[1]); break;
236 case MIFARE_CMD_RESTORE: snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
237 case MIFARE_CMD_TRANSFER: snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
238 case MIFARE_AUTH_KEYA:
239 if ( cmdsize > 3) {
240 snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
241 MifareAuthState = masNt;
242 } else {
243 // case MIFARE_ULEV1_VERSION : both 0x60.
244 snprintf(exp,size,"EV1 VERSION");
245 }
246 break;
247 case MIFARE_AUTH_KEYB:
248 MifareAuthState = masNt;
249 snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
250 break;
251 case MIFARE_MAGICWUPC1: snprintf(exp,size,"MAGIC WUPC1"); break;
252 case MIFARE_MAGICWUPC2: snprintf(exp,size,"MAGIC WUPC2"); break;
253 case MIFARE_MAGICWIPEC: snprintf(exp,size,"MAGIC WIPEC"); break;
254 case MIFARE_ULC_AUTH_1: snprintf(exp,size,"AUTH "); break;
255 case MIFARE_ULC_AUTH_2: snprintf(exp,size,"AUTH_ANSW"); break;
256 case MIFARE_ULEV1_AUTH:
257 if ( cmdsize == 7 )
258 snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
259 else
260 snprintf(exp,size,"PWD-AUTH");
261 break;
262 case MIFARE_ULEV1_FASTREAD:{
263 if ( cmdsize >=3 && cmd[2] <= 0xE6)
264 snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
265 else
266 snprintf(exp,size,"?");
267 break;
268 }
269 case MIFARE_ULC_WRITE:{
270 if ( cmd[1] < 0x21 )
271 snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
272 else
273 snprintf(exp,size,"?");
274 break;
275 }
276 case MIFARE_ULEV1_READ_CNT:{
277 if ( cmd[1] < 5 )
278 snprintf(exp,size,"READ CNT(%d)",cmd[1]);
279 else
280 snprintf(exp,size,"?");
281 break;
282 }
283 case MIFARE_ULEV1_INCR_CNT:{
284 if ( cmd[1] < 5 )
285 snprintf(exp,size,"INCR(%d)",cmd[1]);
286 else
287 snprintf(exp,size,"?");
288 break;
289 }
290 case MIFARE_ULEV1_READSIG: snprintf(exp,size,"READ_SIG"); break;
291 case MIFARE_ULEV1_CHECKTEAR: snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
292 case MIFARE_ULEV1_VCSL: snprintf(exp,size,"VCSL"); break;
293 default: snprintf(exp,size,"?"); break;
294 }
295 return;
296}
297
b957bcd3 298void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
2d7bdee3 299 if (!isResponse && cmdsize == 1) {
300 switch(cmd[0]) {
301 case ISO14443A_CMD_WUPA:
302 case ISO14443A_CMD_REQA:
303 MifareAuthState = masNone;
304 break;
305 default:
306 break;
307 }
308 }
309
aadc6bf1
OM
310 // get UID
311 if (MifareAuthState == masNone) {
7b215d14 312 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
aadc6bf1
OM
313 ClearAuthData();
314 AuthData.uid = bytes_to_num(&cmd[2], 4);
315 }
7b215d14 316 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
aadc6bf1
OM
317 ClearAuthData();
318 AuthData.uid = bytes_to_num(&cmd[2], 4);
319 }
320 }
321
6612a5a2 322 switch(MifareAuthState) {
323 case masNt:
fb30f5a1 324 if (cmdsize == 4 && isResponse) {
aadc6bf1 325 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
6612a5a2 326 MifareAuthState = masNrAr;
079563a0 327 if (AuthData.first_auth) {
7b215d14 328 AuthData.nt = bytes_to_num(cmd, 4);
079563a0 329 } else {
7b215d14 330 AuthData.nt_enc = bytes_to_num(cmd, 4);
b957bcd3 331 AuthData.nt_enc_par = parity[0];
079563a0 332 }
6612a5a2 333 return;
334 } else {
335 MifareAuthState = masError;
6612a5a2 336 }
337 break;
338 case masNrAr:
fb30f5a1 339 if (cmdsize == 8 && !isResponse) {
6c30a244 340 snprintf(exp,size,"AUTH: nr ar (enc)");
6612a5a2 341 MifareAuthState = masAt;
7b215d14
OM
342 AuthData.nr_enc = bytes_to_num(cmd, 4);
343 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
b957bcd3 344 AuthData.ar_enc_par = parity[0] << 4;
6612a5a2 345 return;
346 } else {
347 MifareAuthState = masError;
348 }
349 break;
350 case masAt:
fb30f5a1 351 if (cmdsize == 4 && isResponse) {
6c30a244 352 snprintf(exp,size,"AUTH: at (enc)");
747885a6 353 MifareAuthState = masAuthComplete;
7b215d14 354 AuthData.at_enc = bytes_to_num(cmd, 4);
b957bcd3 355 AuthData.at_enc_par = parity[0];
6612a5a2 356 return;
357 } else {
358 MifareAuthState = masError;
359 }
360 break;
361 default:
362 break;
363 }
364
747885a6 365 if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
6612a5a2 366 annotateIso14443a(exp, size, cmd, cmdsize);
367
368}
7b215d14 369
2d7bdee3 370bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, uint8_t *parity, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
747885a6 371 static struct Crypto1State *traceCrypto1;
dca8220f 372 static uint64_t mfLastKey;
747885a6 373
7b215d14
OM
374 *mfDataLen = 0;
375
747885a6
OM
376 if (MifareAuthState == masAuthComplete) {
377 if (traceCrypto1) {
378 crypto1_destroy(traceCrypto1);
0113dcf3 379 traceCrypto1 = NULL;
747885a6
OM
380 }
381
382 MifareAuthState = masFirstData;
383 return false;
384 }
385
7b215d14
OM
386 if (cmdsize > 32)
387 return false;
388
389 if (MifareAuthState == masFirstData) {
390 if (AuthData.first_auth) {
e01bc794
OM
391 AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
392 AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
0113dcf3 393
394 mfLastKey = GetCrypto1ProbableKey(&AuthData);
6dec58aa 395 PrintAndLog(" | * | key | probable key:%012"PRIx64" Prng:%s ks2:%08x ks3:%08x | |",
0113dcf3 396 mfLastKey,
28ee794f 397 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
e01bc794
OM
398 AuthData.ks2,
399 AuthData.ks3);
7b215d14
OM
400
401 AuthData.first_auth = false;
747885a6 402
e01bc794 403 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
7b215d14 404 } else {
0113dcf3 405 if (traceCrypto1) {
406 crypto1_destroy(traceCrypto1);
407 traceCrypto1 = NULL;
408 }
409
747885a6 410 // check last used key
45b4ac09 411 if (mfLastKey) {
2d7bdee3 412 if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize, parity)) {
6dec58aa 413 PrintAndLog(" | * | key | last used key:%012"PRIx64" ks2:%08x ks3:%08x | |",
0113dcf3 414 mfLastKey,
2d7bdee3 415 AuthData.ks2,
416 AuthData.ks3);
417
418 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
c6a886fb 419 };
747885a6
OM
420 }
421
422 // check default keys
45b4ac09 423 if (!traceCrypto1) {
7bea1581 424 for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
2d7bdee3 425 if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize, parity)) {
6dec58aa 426 PrintAndLog(" | * | key | default key:%012"PRIx64" ks2:%08x ks3:%08x | |",
0113dcf3 427 MifareDefaultKeys[defaultKeyCounter],
2d7bdee3 428 AuthData.ks2,
429 AuthData.ks3);
430
0113dcf3 431 mfLastKey = MifareDefaultKeys[defaultKeyCounter];
856da9a1 432 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
7bea1581
OM
433 break;
434 };
435 }
c6a886fb 436 }
747885a6
OM
437
438 // nested
7bea1581 439 if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
0113dcf3 440 uint32_t ntx = prng_successor(AuthData.nt, 90);
7bea1581
OM
441 for (int i = 0; i < 16383; i++) {
442 ntx = prng_successor(ntx, 1);
443 if (NTParityChk(&AuthData, ntx)){
444
445 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
446 uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
447 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
448 memcpy(mfData, cmd, cmdsize);
449 mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
450
451 crypto1_destroy(pcs);
0113dcf3 452 if (CheckCrypto1Parity(cmd, cmdsize, mfData, parity) && CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
e01bc794
OM
453 AuthData.ks2 = ks2;
454 AuthData.ks3 = ks3;
0113dcf3 455
456 AuthData.nt = ntx;
457 mfLastKey = GetCrypto1ProbableKey(&AuthData);
738ed6e4 458 PrintAndLog(" | * | key | nested probable key:%012"PRIx64" ks2:%08x ks3:%08x | |",
0113dcf3 459 mfLastKey,
460 AuthData.ks2,
461 AuthData.ks3);
462
e01bc794 463 traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
7bea1581
OM
464 break;
465 }
466 }
467 }
747885a6
OM
468 }
469
470 //hardnested
7bea1581 471 if (!traceCrypto1) {
2d7bdee3 472 printf("hardnested not implemented. uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
45b4ac09 473 MifareAuthState = masError;
474
475 /* TOO SLOW( needs to have more strong filter. with this filter - aprox 4 mln tests
476 uint32_t t = msclock();
477 uint32_t t1 = t;
478 int n = 0;
479 for (uint32_t i = 0; i < 0xFFFFFFFF; i++) {
480 if (NTParityChk(&AuthData, i)){
481
482 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(i, 64);
483 uint32_t ks3 = AuthData.at_enc ^ prng_successor(i, 96);
484 struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
485
486
487
488
489 n++;
490
491 if (!(n % 100000)) {
492 printf("delta=%d n=%d ks2=%x ks3=%x \n", msclock() - t1 , n, ks2, ks3);
493 t1 = msclock();
494 }
495
496 }
497 }
498 printf("delta=%d n=%d\n", msclock() - t, n);
499 */
7bea1581 500 }
7b215d14
OM
501 }
502
503
504
505 MifareAuthState = masData;
7b215d14
OM
506 }
507
747885a6
OM
508 if (MifareAuthState == masData && traceCrypto1) {
509 memcpy(mfData, cmd, cmdsize);
510 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
511 *mfDataLen = cmdsize;
7b215d14
OM
512 }
513
514 return *mfDataLen > 0;
515}
516
dca8220f
OM
517bool NTParityChk(TAuthData *ad, uint32_t ntx) {
518 if (
519 (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
520 (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
521 (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
522 )
523 return false;
524
525 uint32_t ar = prng_successor(ntx, 64);
526 if (
527 (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
528 (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
529 (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
530 )
531 return false;
532
533 uint32_t at = prng_successor(ntx, 96);
534 if (
535 (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
536 (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
537 (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
538 (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
539 )
540 return false;
541
542 return true;
543}
544
2d7bdee3 545bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize, uint8_t *parity) {
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546 uint8_t buf[32] = {0};
547 struct Crypto1State *pcs;
548
2d7bdee3 549 AuthData.ks2 = 0;
550 AuthData.ks3 = 0;
551
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552 pcs = crypto1_create(key);
553 uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
554 uint32_t ar = prng_successor(nt1, 64);
555 uint32_t at = prng_successor(nt1, 96);
2d7bdee3 556
557 crypto1_word(pcs, ad->nr_enc, 1);
558// uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc; // if needs deciphered nr
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559 uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
560 uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
dca8220f 561
44964fd1 562 if (!(ar == ar1 && at == at1 && NTParityChk(ad, nt1))) {
563 crypto1_destroy(pcs);
dca8220f 564 return false;
44964fd1 565 }
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566
567 memcpy(buf, cmd, cmdsize);
568 mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
569
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570 crypto1_destroy(pcs);
571
2d7bdee3 572 if (!CheckCrypto1Parity(cmd, cmdsize, buf, parity))
856da9a1 573 return false;
2d7bdee3 574
597fca4f 575 if(!CheckCrc14443(CRC_14443_A, buf, cmdsize))
576 return false;
577
0113dcf3 578 AuthData.nt = nt1;
2d7bdee3 579 AuthData.ks2 = AuthData.ar_enc ^ ar;
580 AuthData.ks3 = AuthData.at_enc ^ at;
581
582 return true;
583}
584
597fca4f 585bool CheckCrypto1Parity(uint8_t *cmd_enc, uint8_t cmdsize, uint8_t *cmd, uint8_t *parity_enc) {
2d7bdee3 586 for (int i = 0; i < cmdsize - 1; i++) {
8253ca0e 587 if (oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (7 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01))
588 return false;
856da9a1 589 }
2d7bdee3 590
591 return true;
bf52d74a 592}
0113dcf3 593
594uint64_t GetCrypto1ProbableKey(TAuthData *ad) {
595 struct Crypto1State *revstate = lfsr_recovery64(ad->ks2, ad->ks3);
596 lfsr_rollback_word(revstate, 0, 0);
597 lfsr_rollback_word(revstate, 0, 0);
598 lfsr_rollback_word(revstate, ad->nr_enc, 1);
599 lfsr_rollback_word(revstate, ad->uid ^ ad->nt, 0);
600
601 uint64_t lfsr = 0;
602 crypto1_get_lfsr(revstate, &lfsr);
603 crypto1_destroy(revstate);
604
605 return lfsr;
606}
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