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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" | |
19 | #include "data.h" | |
20 | #include "ui.h" | |
21 | #include "iso14443crc.h" | |
22 | #include "parity.h" | |
23 | #include "protocols.h" | |
7b215d14 OM |
24 | #include "crapto1/crapto1.h" |
25 | #include "mifarehost.h" | |
c6a886fb | 26 | #include "mifaredefault.h" |
4f131b53 | 27 | |
28 | ||
6612a5a2 | 29 | enum MifareAuthSeq { |
30 | masNone, | |
31 | masNt, | |
32 | masNrAr, | |
33 | masAt, | |
747885a6 | 34 | masAuthComplete, |
aadc6bf1 | 35 | masFirstData, |
6612a5a2 | 36 | masData, |
6612a5a2 | 37 | masError, |
38 | }; | |
39 | static enum MifareAuthSeq MifareAuthState; | |
aadc6bf1 OM |
40 | static TAuthData AuthData; |
41 | ||
42 | void ClearAuthData() { | |
43 | AuthData.uid = 0; | |
44 | AuthData.nt = 0; | |
7b215d14 | 45 | AuthData.first_auth = true; |
e01bc794 OM |
46 | AuthData.ks2 = 0; |
47 | AuthData.ks3 = 0; | |
aadc6bf1 | 48 | } |
6612a5a2 | 49 | |
50 | /** | |
51 | * @brief iso14443A_CRC_check Checks CRC in command or response | |
52 | * @param isResponse | |
53 | * @param data | |
54 | * @param len | |
55 | * @return 0 : CRC-command, CRC not ok | |
56 | * 1 : CRC-command, CRC ok | |
57 | * 2 : Not crc-command | |
58 | */ | |
59 | uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len) | |
60 | { | |
61 | uint8_t b1,b2; | |
62 | ||
63 | if(len <= 2) return 2; | |
64 | ||
65 | if(isResponse & (len < 6)) return 2; | |
66 | ||
67 | ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2); | |
68 | if (b1 != data[len-2] || b2 != data[len-1]) { | |
69 | return 0; | |
70 | } else { | |
71 | return 1; | |
72 | } | |
73 | } | |
74 | ||
75 | uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len) | |
76 | { | |
77 | switch(MifareAuthState) { | |
78 | case masNone: | |
6612a5a2 | 79 | case masError: |
80 | return iso14443A_CRC_check(isResponse, data, len); | |
81 | default: | |
82 | return 2; | |
83 | } | |
6612a5a2 | 84 | } |
85 | ||
86 | void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize) | |
87 | { | |
88 | switch(cmd[0]) | |
89 | { | |
a31f7f89 OM |
90 | case ISO14443A_CMD_WUPA: |
91 | snprintf(exp,size,"WUPA"); | |
a31f7f89 | 92 | break; |
6612a5a2 | 93 | case ISO14443A_CMD_ANTICOLL_OR_SELECT:{ |
94 | // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor) | |
95 | // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK) | |
96 | if(cmd[1] == 0x70) | |
97 | { | |
98 | snprintf(exp,size,"SELECT_UID"); break; | |
99 | }else | |
100 | { | |
101 | snprintf(exp,size,"ANTICOLL"); break; | |
102 | } | |
103 | } | |
104 | case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{ | |
105 | //95 20 = Anticollision of cascade level2 | |
106 | //95 70 = Select of cascade level2 | |
107 | if(cmd[2] == 0x70) | |
108 | { | |
109 | snprintf(exp,size,"SELECT_UID-2"); break; | |
110 | }else | |
111 | { | |
112 | snprintf(exp,size,"ANTICOLL-2"); break; | |
113 | } | |
114 | } | |
a31f7f89 OM |
115 | case ISO14443A_CMD_REQA: |
116 | snprintf(exp,size,"REQA"); | |
a31f7f89 | 117 | break; |
6612a5a2 | 118 | case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break; |
119 | case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break; | |
120 | case ISO14443A_CMD_HALT: | |
121 | snprintf(exp,size,"HALT"); | |
122 | MifareAuthState = masNone; | |
123 | break; | |
124 | case ISO14443A_CMD_RATS: snprintf(exp,size,"RATS"); break; | |
125 | case MIFARE_CMD_INC: snprintf(exp,size,"INC(%d)",cmd[1]); break; | |
126 | case MIFARE_CMD_DEC: snprintf(exp,size,"DEC(%d)",cmd[1]); break; | |
127 | case MIFARE_CMD_RESTORE: snprintf(exp,size,"RESTORE(%d)",cmd[1]); break; | |
128 | case MIFARE_CMD_TRANSFER: snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break; | |
129 | case MIFARE_AUTH_KEYA: | |
130 | if ( cmdsize > 3) { | |
131 | snprintf(exp,size,"AUTH-A(%d)",cmd[1]); | |
132 | MifareAuthState = masNt; | |
133 | } else { | |
134 | // case MIFARE_ULEV1_VERSION : both 0x60. | |
135 | snprintf(exp,size,"EV1 VERSION"); | |
136 | } | |
137 | break; | |
138 | case MIFARE_AUTH_KEYB: | |
139 | MifareAuthState = masNt; | |
140 | snprintf(exp,size,"AUTH-B(%d)",cmd[1]); | |
141 | break; | |
142 | case MIFARE_MAGICWUPC1: snprintf(exp,size,"MAGIC WUPC1"); break; | |
143 | case MIFARE_MAGICWUPC2: snprintf(exp,size,"MAGIC WUPC2"); break; | |
144 | case MIFARE_MAGICWIPEC: snprintf(exp,size,"MAGIC WIPEC"); break; | |
145 | case MIFARE_ULC_AUTH_1: snprintf(exp,size,"AUTH "); break; | |
146 | case MIFARE_ULC_AUTH_2: snprintf(exp,size,"AUTH_ANSW"); break; | |
147 | case MIFARE_ULEV1_AUTH: | |
148 | if ( cmdsize == 7 ) | |
149 | snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] ); | |
150 | else | |
151 | snprintf(exp,size,"PWD-AUTH"); | |
152 | break; | |
153 | case MIFARE_ULEV1_FASTREAD:{ | |
154 | if ( cmdsize >=3 && cmd[2] <= 0xE6) | |
155 | snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]); | |
156 | else | |
157 | snprintf(exp,size,"?"); | |
158 | break; | |
159 | } | |
160 | case MIFARE_ULC_WRITE:{ | |
161 | if ( cmd[1] < 0x21 ) | |
162 | snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); | |
163 | else | |
164 | snprintf(exp,size,"?"); | |
165 | break; | |
166 | } | |
167 | case MIFARE_ULEV1_READ_CNT:{ | |
168 | if ( cmd[1] < 5 ) | |
169 | snprintf(exp,size,"READ CNT(%d)",cmd[1]); | |
170 | else | |
171 | snprintf(exp,size,"?"); | |
172 | break; | |
173 | } | |
174 | case MIFARE_ULEV1_INCR_CNT:{ | |
175 | if ( cmd[1] < 5 ) | |
176 | snprintf(exp,size,"INCR(%d)",cmd[1]); | |
177 | else | |
178 | snprintf(exp,size,"?"); | |
179 | break; | |
180 | } | |
181 | case MIFARE_ULEV1_READSIG: snprintf(exp,size,"READ_SIG"); break; | |
182 | case MIFARE_ULEV1_CHECKTEAR: snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break; | |
183 | case MIFARE_ULEV1_VCSL: snprintf(exp,size,"VCSL"); break; | |
184 | default: snprintf(exp,size,"?"); break; | |
185 | } | |
186 | return; | |
187 | } | |
188 | ||
b957bcd3 | 189 | void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) { |
2d7bdee3 | 190 | if (!isResponse && cmdsize == 1) { |
191 | switch(cmd[0]) { | |
192 | case ISO14443A_CMD_WUPA: | |
193 | case ISO14443A_CMD_REQA: | |
194 | MifareAuthState = masNone; | |
195 | break; | |
196 | default: | |
197 | break; | |
198 | } | |
199 | } | |
200 | ||
aadc6bf1 OM |
201 | // get UID |
202 | if (MifareAuthState == masNone) { | |
7b215d14 | 203 | if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) { |
aadc6bf1 OM |
204 | ClearAuthData(); |
205 | AuthData.uid = bytes_to_num(&cmd[2], 4); | |
206 | } | |
7b215d14 | 207 | if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) { |
aadc6bf1 OM |
208 | ClearAuthData(); |
209 | AuthData.uid = bytes_to_num(&cmd[2], 4); | |
210 | } | |
211 | } | |
212 | ||
6612a5a2 | 213 | switch(MifareAuthState) { |
214 | case masNt: | |
fb30f5a1 | 215 | if (cmdsize == 4 && isResponse) { |
aadc6bf1 | 216 | snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)"); |
6612a5a2 | 217 | MifareAuthState = masNrAr; |
aadc6bf1 | 218 | if (AuthData.first_auth) |
7b215d14 | 219 | AuthData.nt = bytes_to_num(cmd, 4); |
aadc6bf1 | 220 | else |
7b215d14 | 221 | AuthData.nt_enc = bytes_to_num(cmd, 4); |
b957bcd3 | 222 | AuthData.nt_enc_par = parity[0]; |
6612a5a2 | 223 | return; |
224 | } else { | |
225 | MifareAuthState = masError; | |
6612a5a2 | 226 | } |
227 | break; | |
228 | case masNrAr: | |
fb30f5a1 | 229 | if (cmdsize == 8 && !isResponse) { |
6c30a244 | 230 | snprintf(exp,size,"AUTH: nr ar (enc)"); |
6612a5a2 | 231 | MifareAuthState = masAt; |
7b215d14 OM |
232 | AuthData.nr_enc = bytes_to_num(cmd, 4); |
233 | AuthData.ar_enc = bytes_to_num(&cmd[4], 4); | |
b957bcd3 | 234 | AuthData.ar_enc_par = parity[0] << 4; |
6612a5a2 | 235 | return; |
236 | } else { | |
237 | MifareAuthState = masError; | |
238 | } | |
239 | break; | |
240 | case masAt: | |
fb30f5a1 | 241 | if (cmdsize == 4 && isResponse) { |
6c30a244 | 242 | snprintf(exp,size,"AUTH: at (enc)"); |
747885a6 | 243 | MifareAuthState = masAuthComplete; |
7b215d14 | 244 | AuthData.at_enc = bytes_to_num(cmd, 4); |
b957bcd3 | 245 | AuthData.at_enc_par = parity[0]; |
6612a5a2 | 246 | return; |
247 | } else { | |
248 | MifareAuthState = masError; | |
249 | } | |
250 | break; | |
251 | default: | |
252 | break; | |
253 | } | |
254 | ||
747885a6 | 255 | if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError))) |
6612a5a2 | 256 | annotateIso14443a(exp, size, cmd, cmdsize); |
257 | ||
258 | } | |
7b215d14 | 259 | |
2d7bdee3 | 260 | bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, uint8_t *parity, bool isResponse, uint8_t *mfData, size_t *mfDataLen) { |
747885a6 | 261 | static struct Crypto1State *traceCrypto1; |
dca8220f | 262 | static uint64_t mfLastKey; |
747885a6 | 263 | |
7b215d14 OM |
264 | *mfDataLen = 0; |
265 | ||
747885a6 OM |
266 | if (MifareAuthState == masAuthComplete) { |
267 | if (traceCrypto1) { | |
268 | crypto1_destroy(traceCrypto1); | |
269 | } | |
270 | ||
271 | MifareAuthState = masFirstData; | |
272 | return false; | |
273 | } | |
274 | ||
7b215d14 OM |
275 | if (cmdsize > 32) |
276 | return false; | |
277 | ||
278 | if (MifareAuthState == masFirstData) { | |
279 | if (AuthData.first_auth) { | |
e01bc794 OM |
280 | AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64); |
281 | AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96); | |
282 | struct Crypto1State *revstate = lfsr_recovery64(AuthData.ks2, AuthData.ks3); | |
7b215d14 OM |
283 | lfsr_rollback_word(revstate, 0, 0); |
284 | lfsr_rollback_word(revstate, 0, 0); | |
285 | lfsr_rollback_word(revstate, AuthData.nr_enc, 1); | |
286 | lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0); | |
287 | ||
288 | uint64_t lfsr = 0; | |
289 | crypto1_get_lfsr(revstate, &lfsr); | |
290 | crypto1_destroy(revstate); | |
747885a6 | 291 | mfLastKey = lfsr; |
28ee794f | 292 | PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |", |
2d7bdee3 | 293 | (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), |
294 | (unsigned int)(lfsr & 0xFFFFFFFF), | |
28ee794f | 295 | validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD", |
e01bc794 OM |
296 | AuthData.ks2, |
297 | AuthData.ks3); | |
7b215d14 OM |
298 | |
299 | AuthData.first_auth = false; | |
747885a6 | 300 | |
e01bc794 | 301 | traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3); |
7b215d14 | 302 | } else { |
747885a6 OM |
303 | // check last used key |
304 | if (mfLastKey) { | |
2d7bdee3 | 305 | if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize, parity)) { |
306 | PrintAndLog(" | * | key | last used key:%x%x ks2:%08x ks3:%08x | |", | |
307 | (unsigned int)((mfLastKey & 0xFFFFFFFF00000000) >> 32), | |
308 | (unsigned int)(mfLastKey & 0xFFFFFFFF), | |
309 | AuthData.ks2, | |
310 | AuthData.ks3); | |
311 | ||
312 | traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3); | |
c6a886fb | 313 | }; |
747885a6 OM |
314 | } |
315 | ||
316 | // check default keys | |
7bea1581 OM |
317 | if (!traceCrypto1) { |
318 | for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){ | |
2d7bdee3 | 319 | if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize, parity)) { |
320 | PrintAndLog(" | * | key | default key:%x%x ks2:%08x ks3:%08x | |", | |
321 | (unsigned int)((MifareDefaultKeys[defaultKeyCounter] & 0xFFFFFFFF00000000) >> 32), | |
322 | (unsigned int)(MifareDefaultKeys[defaultKeyCounter] & 0xFFFFFFFF), | |
323 | AuthData.ks2, | |
324 | AuthData.ks3); | |
325 | ||
856da9a1 | 326 | traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3); |
7bea1581 OM |
327 | break; |
328 | }; | |
329 | } | |
c6a886fb | 330 | } |
747885a6 OM |
331 | |
332 | // nested | |
7bea1581 | 333 | if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) { |
2d7bdee3 | 334 | printf("nested. uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc); |
7bea1581 OM |
335 | uint32_t ntx = prng_successor(AuthData.nt, 90); |
336 | for (int i = 0; i < 16383; i++) { | |
337 | ntx = prng_successor(ntx, 1); | |
338 | if (NTParityChk(&AuthData, ntx)){ | |
339 | ||
340 | uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64); | |
341 | uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96); | |
342 | struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3); | |
343 | memcpy(mfData, cmd, cmdsize); | |
344 | mf_crypto1_decrypt(pcs, mfData, cmdsize, 0); | |
345 | ||
346 | crypto1_destroy(pcs); | |
347 | if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) { | |
e01bc794 OM |
348 | AuthData.ks2 = ks2; |
349 | AuthData.ks3 = ks3; | |
350 | traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3); | |
7bea1581 OM |
351 | break; |
352 | } | |
353 | } | |
354 | } | |
355 | if (traceCrypto1) | |
356 | printf("key> nt=%08x nonce distance=%d \n", ntx, nonce_distance(AuthData.nt, ntx)); | |
357 | else | |
358 | printf("key> don't have any valid nt( \n"); | |
747885a6 OM |
359 | } |
360 | ||
361 | //hardnested | |
7bea1581 | 362 | if (!traceCrypto1) { |
2d7bdee3 | 363 | 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); |
7bea1581 | 364 | } |
7b215d14 OM |
365 | } |
366 | ||
367 | ||
368 | ||
369 | MifareAuthState = masData; | |
7b215d14 OM |
370 | } |
371 | ||
747885a6 OM |
372 | if (MifareAuthState == masData && traceCrypto1) { |
373 | memcpy(mfData, cmd, cmdsize); | |
374 | mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0); | |
375 | *mfDataLen = cmdsize; | |
7b215d14 OM |
376 | } |
377 | ||
378 | return *mfDataLen > 0; | |
379 | } | |
380 | ||
dca8220f OM |
381 | bool NTParityChk(TAuthData *ad, uint32_t ntx) { |
382 | if ( | |
383 | (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) || | |
384 | (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) || | |
385 | (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01)) | |
386 | ) | |
387 | return false; | |
388 | ||
389 | uint32_t ar = prng_successor(ntx, 64); | |
390 | if ( | |
391 | (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) || | |
392 | (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) || | |
393 | (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01)) | |
394 | ) | |
395 | return false; | |
396 | ||
397 | uint32_t at = prng_successor(ntx, 96); | |
398 | if ( | |
399 | (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) || | |
400 | (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) || | |
401 | (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) || | |
402 | (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01)) | |
403 | ) | |
404 | return false; | |
405 | ||
406 | return true; | |
407 | } | |
408 | ||
2d7bdee3 | 409 | bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize, uint8_t *parity) { |
dca8220f OM |
410 | uint8_t buf[32] = {0}; |
411 | struct Crypto1State *pcs; | |
412 | ||
2d7bdee3 | 413 | AuthData.ks2 = 0; |
414 | AuthData.ks3 = 0; | |
415 | ||
dca8220f OM |
416 | pcs = crypto1_create(key); |
417 | uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc; | |
418 | uint32_t ar = prng_successor(nt1, 64); | |
419 | uint32_t at = prng_successor(nt1, 96); | |
2d7bdee3 | 420 | |
421 | crypto1_word(pcs, ad->nr_enc, 1); | |
422 | // uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc; // if needs deciphered nr | |
dca8220f OM |
423 | uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc; |
424 | uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc; | |
dca8220f | 425 | |
2d7bdee3 | 426 | if (!(ar == ar1 && at == at1 && NTParityChk(ad, nt1))) |
dca8220f | 427 | return false; |
dca8220f OM |
428 | |
429 | memcpy(buf, cmd, cmdsize); | |
430 | mf_crypto1_decrypt(pcs, buf, cmdsize, 0); | |
431 | ||
e0158d33 OM |
432 | crypto1_destroy(pcs); |
433 | ||
2d7bdee3 | 434 | if(!CheckCrc14443(CRC_14443_A, buf, cmdsize)) |
435 | return false; | |
436 | ||
437 | if (!CheckCrypto1Parity(cmd, cmdsize, buf, parity)) | |
856da9a1 | 438 | return false; |
2d7bdee3 | 439 | |
440 | AuthData.ks2 = AuthData.ar_enc ^ ar; | |
441 | AuthData.ks3 = AuthData.at_enc ^ at; | |
442 | ||
443 | return true; | |
444 | } | |
445 | ||
446 | bool CheckCrypto1Parity(uint8_t *cmd, uint8_t cmdsize, uint8_t *cmd_enc, uint8_t *parity_enc) { | |
447 | printf("parity check. size=%d\n", cmdsize); | |
448 | printf("cmd =%s\n", sprint_hex(cmd, cmdsize)); | |
449 | printf("cmd_enc=%s\n", sprint_hex(cmd_enc, cmdsize)); | |
450 | printf("parity=%s\n", printBitsPar(parity_enc, cmdsize)); | |
451 | // (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) || | |
452 | for (int i = 0; i < cmdsize - 1; i++) { | |
453 | bool b = oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (6 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01); | |
454 | printf("i=%d b=%d\n", i, b); | |
455 | if (b) | |
456 | return false; | |
856da9a1 | 457 | } |
2d7bdee3 | 458 | |
459 | return true; | |
bf52d74a | 460 | } |