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[proxmark3-svn] / armsrc / mifareutil.c
1 //-----------------------------------------------------------------------------
2 // Merlok, May 2011, 2012
3 // Many authors, whom made it possible
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 // Work with mifare cards.
10 //-----------------------------------------------------------------------------
11
12 #include <string.h>
13 #include "mifareutil.h"
14 #include "proxmark3.h"
15 #include "apps.h"
16 #include "util.h"
17 #include "parity.h"
18
19 #include "iso14443crc.h"
20 #include "iso14443a.h"
21 #include "crapto1/crapto1.h"
22 #include "polarssl/des.h"
23
24 int MF_DBGLEVEL = MF_DBG_ALL;
25
26 // crypto1 helpers
27 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
28 uint8_t bt = 0;
29 int i;
30
31 if (len != 1) {
32 for (i = 0; i < len; i++)
33 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
34 } else {
35 bt = 0;
36 for (i = 0; i < 4; i++)
37 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;
38
39 data[0] = bt;
40 }
41 return;
42 }
43
44 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
45 uint8_t bt = 0;
46 int i;
47 par[0] = 0;
48
49 for (i = 0; i < len; i++) {
50 bt = data[i];
51 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
52 if((i&0x0007) == 0)
53 par[i>>3] = 0;
54 par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007)));
55 }
56 return;
57 }
58
59 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
60 uint8_t bt = 0;
61 int i;
62
63 for (i = 0; i < 4; i++)
64 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;
65
66 return bt;
67 }
68
69 // send X byte basic commands
70 int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
71 {
72 uint8_t dcmd[data_size+3];
73 dcmd[0] = cmd;
74 memcpy(dcmd+1,data,data_size);
75 AppendCrc14443a(dcmd, data_size+1);
76 ReaderTransmit(dcmd, sizeof(dcmd), timing);
77 int len = ReaderReceive(answer, answer_parity);
78 if(!len) {
79 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("%02X Cmd failed. Card timeout.", cmd);
80 len = ReaderReceive(answer,answer_parity);
81 //return 0;
82 }
83 return len;
84 }
85
86 // send 2 byte commands
87 int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
88 {
89 uint8_t dcmd[4], ecmd[4];
90 uint16_t pos, res;
91 uint8_t par[1]; // 1 Byte parity is enough here
92 dcmd[0] = cmd;
93 dcmd[1] = data;
94 AppendCrc14443a(dcmd, 2);
95
96 memcpy(ecmd, dcmd, sizeof(dcmd));
97
98 if (crypted) {
99 par[0] = 0;
100 for (pos = 0; pos < 4; pos++)
101 {
102 ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
103 par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos));
104 }
105
106 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
107
108 } else {
109 ReaderTransmit(dcmd, sizeof(dcmd), timing);
110 }
111
112 int len = ReaderReceive(answer, par);
113
114 if (answer_parity) *answer_parity = par[0];
115
116 if (crypted == CRYPT_ALL) {
117 if (len == 1) {
118 res = 0;
119 for (pos = 0; pos < 4; pos++)
120 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
121
122 answer[0] = res;
123
124 } else {
125 for (pos = 0; pos < len; pos++)
126 {
127 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
128 }
129 }
130 }
131
132 return len;
133 }
134
135 // mifare classic commands
136 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested)
137 {
138 return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
139 }
140
141 int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *ntptr, uint32_t *timing)
142 {
143 // variables
144 int len;
145 uint32_t pos;
146 uint8_t tmp4[4];
147 uint8_t par[1] = {0x00};
148 byte_t nr[4];
149 uint32_t nt, ntpp; // Supplied tag nonce
150
151 uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
152 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
153 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
154
155 // Transmit MIFARE_CLASSIC_AUTH
156 len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
157 if (MF_DBGLEVEL >= 4) Dbprintf("rand tag nonce len: %x", len);
158 if (len != 4) return 1;
159
160 // "random" reader nonce:
161 nr[0] = 0x55;
162 nr[1] = 0x41;
163 nr[2] = 0x49;
164 nr[3] = 0x92;
165
166 // Save the tag nonce (nt)
167 nt = bytes_to_num(receivedAnswer, 4);
168
169 // ----------------------------- crypto1 create
170 if (isNested)
171 crypto1_destroy(pcs);
172
173 // Init cipher with key
174 crypto1_create(pcs, ui64Key);
175
176 if (isNested == AUTH_NESTED) {
177 // decrypt nt with help of new key
178 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
179 } else {
180 // Load (plain) uid^nt into the cipher
181 crypto1_word(pcs, nt ^ uid, 0);
182 }
183
184 // some statistic
185 if (!ntptr && (MF_DBGLEVEL >= 3))
186 Dbprintf("auth uid: %08x nt: %08x", uid, nt);
187
188 // save Nt
189 if (ntptr)
190 *ntptr = nt;
191
192 // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
193 par[0] = 0;
194 for (pos = 0; pos < 4; pos++)
195 {
196 mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
197 par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
198 }
199
200 // Skip 32 bits in pseudo random generator
201 nt = prng_successor(nt,32);
202
203 // ar+parity
204 for (pos = 4; pos < 8; pos++)
205 {
206 nt = prng_successor(nt,8);
207 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
208 par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos));
209 }
210
211 // Transmit reader nonce and reader answer
212 ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
213
214 // Receive 4 byte tag answer
215 len = ReaderReceive(receivedAnswer, receivedAnswerPar);
216 if (!len)
217 {
218 if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout.");
219 return 2;
220 }
221
222 memcpy(tmp4, receivedAnswer, 4);
223 ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
224
225 if (ntpp != bytes_to_num(tmp4, 4)) {
226 if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Error card response.");
227 return 3;
228 }
229
230 return 0;
231 }
232
233 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
234 {
235 // variables
236 int len;
237 uint8_t bt[2];
238
239 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
240 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
241
242 // command MIFARE_CLASSIC_READBLOCK
243 len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
244 if (len == 1) {
245 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
246 return 1;
247 }
248 if (len != 18) {
249 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: card timeout. len: %x", len);
250 return 2;
251 }
252
253 memcpy(bt, receivedAnswer + 16, 2);
254 AppendCrc14443a(receivedAnswer, 16);
255 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
256 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd CRC response error.");
257 return 3;
258 }
259
260 memcpy(blockData, receivedAnswer, 16);
261 return 0;
262 }
263
264 // mifare ultralight commands
265 int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
266
267 uint16_t len;
268 uint8_t resp[4];
269 uint8_t respPar[1];
270 uint8_t key[4] = {0x00};
271 memcpy(key, keybytes, 4);
272
273 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
274 Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
275 len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL);
276 //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
277 if (len != 4) {
278 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
279 return 0;
280 }
281
282 if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
283 Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
284
285 memcpy(pack, resp, 4);
286 return 1;
287 }
288
289 int mifare_ultra_auth(uint8_t *keybytes){
290
291 /// 3des2k
292
293 des3_context ctx = { 0x00 };
294 uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
295 uint8_t random_b[8] = {0x00};
296 uint8_t enc_random_b[8] = {0x00};
297 uint8_t rnd_ab[16] = {0x00};
298 uint8_t IV[8] = {0x00};
299 uint8_t key[16] = {0x00};
300 memcpy(key, keybytes, 16);
301
302 uint16_t len;
303 uint8_t resp[19] = {0x00};
304 uint8_t respPar[3] = {0,0,0};
305
306 // REQUEST AUTHENTICATION
307 len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);
308 if (len != 11) {
309 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
310 return 0;
311 }
312
313 // tag nonce.
314 memcpy(enc_random_b,resp+1,8);
315
316 // decrypt nonce.
317 // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
318 des3_set2key_dec(&ctx, key);
319 des3_crypt_cbc(&ctx // des3_context
320 , DES_DECRYPT // int mode
321 , sizeof(random_b) // length
322 , IV // iv[8]
323 , enc_random_b // input
324 , random_b // output
325 );
326
327 rol(random_b,8);
328 memcpy(rnd_ab ,random_a,8);
329 memcpy(rnd_ab+8,random_b,8);
330
331 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
332 Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
333 enc_random_b[0],enc_random_b[1],enc_random_b[2],enc_random_b[3],enc_random_b[4],enc_random_b[5],enc_random_b[6],enc_random_b[7]);
334
335 Dbprintf(" B: %02x %02x %02x %02x %02x %02x %02x %02x",
336 random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
337
338 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
339 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
340
341 Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
342 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
343 }
344
345 // encrypt out, in, length, key, iv
346 //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
347 des3_set2key_enc(&ctx, key);
348 des3_crypt_cbc(&ctx // des3_context
349 , DES_ENCRYPT // int mode
350 , sizeof(rnd_ab) // length
351 , enc_random_b // iv[8]
352 , rnd_ab // input
353 , rnd_ab // output
354 );
355
356 //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
357 len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
358 if (len != 11) {
359 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
360 return 0;
361 }
362
363 uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
364 uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
365 memcpy(enc_resp, resp+1, 8);
366
367 // decrypt out, in, length, key, iv
368 // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
369 des3_set2key_dec(&ctx, key);
370 des3_crypt_cbc(&ctx // des3_context
371 , DES_DECRYPT // int mode
372 , 8 // length
373 , enc_random_b // iv[8]
374 , enc_resp // input
375 , resp_random_a // output
376 );
377 if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
378 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
379 return 0;
380 }
381
382 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
383 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
384 rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
385 rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
386
387 Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
388 rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
389 rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
390
391 Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
392 random_a[0],random_a[1],random_a[2],random_a[3],
393 random_a[4],random_a[5],random_a[6],random_a[7]);
394
395 Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
396 resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
397 resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
398 }
399 return 1;
400 }
401
402 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
403 {
404 uint16_t len;
405 uint8_t bt[2];
406 uint8_t receivedAnswer[MAX_FRAME_SIZE];
407 uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
408
409
410 len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
411 if (len == 1) {
412 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
413 return 1;
414 }
415 if (len != 18) {
416 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
417 return 2;
418 }
419
420 memcpy(bt, receivedAnswer + 16, 2);
421 AppendCrc14443a(receivedAnswer, 16);
422 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
423 if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error.");
424 return 3;
425 }
426
427 memcpy(blockData, receivedAnswer, 14);
428 return 0;
429 }
430
431 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
432 {
433 // variables
434 uint16_t len, i;
435 uint32_t pos;
436 uint8_t par[3] = {0}; // enough for 18 Bytes to send
437 byte_t res;
438
439 uint8_t d_block[18], d_block_enc[18];
440 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
441 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
442
443 // command MIFARE_CLASSIC_WRITEBLOCK
444 len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
445
446 if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
447 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
448 return 1;
449 }
450
451 memcpy(d_block, blockData, 16);
452 AppendCrc14443a(d_block, 16);
453
454 // crypto
455 for (pos = 0; pos < 18; pos++)
456 {
457 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
458 par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
459 }
460
461 ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
462
463 // Receive the response
464 len = ReaderReceive(receivedAnswer, receivedAnswerPar);
465
466 res = 0;
467 for (i = 0; i < 4; i++)
468 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
469
470 if ((len != 1) || (res != 0x0A)) {
471 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd send data2 Error: %02x", res);
472 return 2;
473 }
474
475 return 0;
476 }
477
478 /* // command not needed, but left for future testing
479 int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData)
480 {
481 uint16_t len;
482 uint8_t par[3] = {0}; // enough for 18 parity bits
483 uint8_t d_block[18] = {0x00};
484 uint8_t receivedAnswer[MAX_FRAME_SIZE];
485 uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
486
487 len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
488
489 if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
490 if (MF_DBGLEVEL >= MF_DBG_ERROR)
491 Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
492 return 1;
493 }
494
495 memcpy(d_block, blockData, 16);
496 AppendCrc14443a(d_block, 16);
497
498 ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
499
500 len = ReaderReceive(receivedAnswer, receivedAnswerPar);
501
502 if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
503 if (MF_DBGLEVEL >= MF_DBG_ERROR)
504 Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
505 return 2;
506 }
507 return 0;
508 }
509 */
510
511 int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
512 {
513 uint16_t len;
514 uint8_t d_block[5] = {0x00};
515 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
516 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
517
518 // command MIFARE_CLASSIC_WRITEBLOCK
519 d_block[0]= blockNo;
520 memcpy(d_block+1,blockData,4);
521 //AppendCrc14443a(d_block, 6);
522
523 len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
524
525 if (receivedAnswer[0] != 0x0A) { // 0x0a - ACK
526 if (MF_DBGLEVEL >= MF_DBG_ERROR)
527 Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
528 return 1;
529 }
530 return 0;
531 }
532
533 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
534 {
535 uint16_t len;
536 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
537 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
538
539 len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
540 if (len != 0) {
541 if (MF_DBGLEVEL >= MF_DBG_ERROR)
542 Dbprintf("halt error. response len: %x", len);
543 return 1;
544 }
545
546 return 0;
547 }
548
549 int mifare_ultra_halt()
550 {
551 uint16_t len;
552 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
553 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
554
555 len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL);
556 if (len != 0) {
557 if (MF_DBGLEVEL >= MF_DBG_ERROR)
558 Dbprintf("halt error. response len: %x", len);
559 return 1;
560 }
561 return 0;
562 }
563
564
565 // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
566 // plus evtl. 8 sectors with 16 blocks each (4k cards)
567 uint8_t NumBlocksPerSector(uint8_t sectorNo)
568 {
569 if (sectorNo < 32)
570 return 4;
571 else
572 return 16;
573 }
574
575 uint8_t FirstBlockOfSector(uint8_t sectorNo)
576 {
577 if (sectorNo < 32)
578 return sectorNo * 4;
579 else
580 return 32*4 + (sectorNo - 32) * 16;
581
582 }
583
584
585 // work with emulator memory
586 void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
587 uint8_t* emCARD = BigBuf_get_EM_addr();
588 memcpy(emCARD + blockNum * 16, data, blocksCount * 16);
589 }
590
591 void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
592 uint8_t* emCARD = BigBuf_get_EM_addr();
593 memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
594 }
595
596 void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {
597 uint8_t* emCARD = BigBuf_get_EM_addr();
598 memcpy(data, emCARD + bytePtr, byteCount);
599 }
600
601 int emlCheckValBl(int blockNum) {
602 uint8_t* emCARD = BigBuf_get_EM_addr();
603 uint8_t* data = emCARD + blockNum * 16;
604
605 if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
606 (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
607 (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
608 (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
609 (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
610 (data[12] != (data[15] ^ 0xff))
611 )
612 return 1;
613 return 0;
614 }
615
616 int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
617 uint8_t* emCARD = BigBuf_get_EM_addr();
618 uint8_t* data = emCARD + blockNum * 16;
619
620 if (emlCheckValBl(blockNum)) {
621 return 1;
622 }
623
624 memcpy(blReg, data, 4);
625 *blBlock = data[12];
626 return 0;
627 }
628
629 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
630 uint8_t* emCARD = BigBuf_get_EM_addr();
631 uint8_t* data = emCARD + blockNum * 16;
632
633 memcpy(data + 0, &blReg, 4);
634 memcpy(data + 8, &blReg, 4);
635 blReg = blReg ^ 0xffffffff;
636 memcpy(data + 4, &blReg, 4);
637
638 data[12] = blBlock;
639 data[13] = blBlock ^ 0xff;
640 data[14] = blBlock;
641 data[15] = blBlock ^ 0xff;
642
643 return 0;
644 }
645
646 uint64_t emlGetKey(int sectorNum, int keyType) {
647 uint8_t key[6];
648 uint8_t* emCARD = BigBuf_get_EM_addr();
649
650 memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
651 return bytes_to_num(key, 6);
652 }
653
654 void emlClearMem(void) {
655 int b;
656
657 const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
658 const uint8_t uid[] = {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
659 uint8_t* emCARD = BigBuf_get_EM_addr();
660
661 memset(emCARD, 0, CARD_MEMORY_SIZE);
662
663 // fill sectors trailer data
664 for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
665 emlSetMem((uint8_t *)trailer, b , 1);
666 }
667
668 // uid
669 emlSetMem((uint8_t *)uid, 0, 1);
670 return;
671 }
672
673
674 // Mifare desfire commands
675 int mifare_sendcmd_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
676 {
677 uint8_t dcmd[5] = {0x00};
678 dcmd[0] = cmd;
679 memcpy(dcmd+1,data,2);
680 AppendCrc14443a(dcmd, 3);
681
682 ReaderTransmit(dcmd, sizeof(dcmd), NULL);
683 int len = ReaderReceive(answer, answer_parity);
684 if(!len) {
685 if (MF_DBGLEVEL >= MF_DBG_ERROR)
686 Dbprintf("Authentication failed. Card timeout.");
687 return 1;
688 }
689 return len;
690 }
691
692 int mifare_sendcmd_special2(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer,uint8_t *answer_parity, uint32_t *timing)
693 {
694 uint8_t dcmd[20] = {0x00};
695 dcmd[0] = cmd;
696 memcpy(dcmd+1,data,17);
697 AppendCrc14443a(dcmd, 18);
698
699 ReaderTransmit(dcmd, sizeof(dcmd), NULL);
700 int len = ReaderReceive(answer, answer_parity);
701 if(!len){
702 if (MF_DBGLEVEL >= MF_DBG_ERROR)
703 Dbprintf("Authentication failed. Card timeout.");
704 return 1;
705 }
706 return len;
707 }
708
709 int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
710
711 int len;
712 // load key, keynumber
713 uint8_t data[2]={0x0a, 0x00};
714 uint8_t receivedAnswer[MAX_FRAME_SIZE];
715 uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
716
717 len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
718 if (len == 1) {
719 if (MF_DBGLEVEL >= MF_DBG_ERROR)
720 Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
721 return 1;
722 }
723
724 if (len == 12) {
725 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
726 Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
727 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
728 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
729 receivedAnswer[10],receivedAnswer[11]);
730 }
731 memcpy(blockData, receivedAnswer, 12);
732 return 0;
733 }
734 return 1;
735 }
736
737 int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
738
739 int len;
740 uint8_t data[17] = {0x00};
741 data[0] = 0xAF;
742 memcpy(data+1,key,16);
743
744 uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
745 uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
746
747 len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL);
748
749 if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
750 if (MF_DBGLEVEL >= MF_DBG_ERROR)
751 Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
752 return 1;
753 }
754
755 if (len == 12){
756 if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
757 Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
758 receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
759 receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
760 receivedAnswer[10],receivedAnswer[11]);
761 }
762 memcpy(blockData, receivedAnswer, 12);
763 return 0;
764 }
765 return 1;
766 }
767
768 //-----------------------------------------------------------------------------
769 // MIFARE check keys
770 //
771 //-----------------------------------------------------------------------------
772 // one key check
773 int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
774
775 struct Crypto1State mpcs = {0, 0};
776 struct Crypto1State *pcs;
777 pcs = &mpcs;
778
779 // Iceman: use piwi's faster nonce collecting part in hardnested.
780 if (*cascade_levels == 0) { // need a full select cycle to get the uid first
781 iso14a_card_select_t card_info;
782 if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
783 if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card");
784 return 1;
785 }
786 switch (card_info.uidlen) {
787 case 4 : *cascade_levels = 1; break;
788 case 7 : *cascade_levels = 2; break;
789 case 10: *cascade_levels = 3; break;
790 default: break;
791 }
792 } else { // no need for anticollision. We can directly select the card
793 if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
794 if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
795 return 1;
796 }
797 }
798
799 if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
800 // SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
801 return 2;
802 } else {
803 /* // let it be here. it like halt command, but maybe it will work in some strange cases
804 uint8_t dummy_answer = 0;
805 ReaderTransmit(&dummy_answer, 1, NULL);
806 int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
807 // wait for the card to become ready again
808 while(GetCountSspClk() < timeout) {};
809 */
810 // it needs after success authentication
811 mifare_classic_halt(pcs, *cuid);
812 }
813
814 return 0;
815 }
816
817 // multi key check
818 int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
819 uint8_t uid[10];
820 uint32_t cuid = 0;
821 uint8_t cascade_levels = 0;
822 uint64_t ui64Key = 0;
823
824 int retryCount = 0;
825 for (uint8_t i = 0; i < keyCount; i++) {
826
827 // Allow button press / usb cmd to interrupt device
828 if (BUTTON_PRESS() && !usb_poll_validate_length()) {
829 Dbprintf("ChkKeys: Cancel operation. Exit...");
830 return -2;
831 }
832
833 ui64Key = bytes_to_num(keys + i * 6, 6);
834 int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
835
836 // can't select
837 if (res == 1) {
838 retryCount++;
839 if (retryCount >= 5) {
840 Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
841 return -1;
842 }
843 --i; // try the same key once again
844
845 SpinDelay(20);
846 // Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
847 continue;
848 }
849
850 // can't authenticate
851 if (res == 2) {
852 retryCount = 0;
853 continue; // can't auth. wrong key.
854 }
855
856 return i + 1;
857 }
858
859 return 0;
860 }
861
862 // multisector multikey check
863 int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
864 int res = 0;
865
866 // int clk = GetCountSspClk();
867
868 for(int sc = 0; sc < SectorCount; sc++){
869 WDT_HIT();
870
871 int keyAB = keyType;
872 do {
873 res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
874 if (res < 0){
875 return res;
876 }
877 if (res > 0){
878 (*keyIndex)[keyAB & 0x01][sc] = res;
879 }
880 } while(--keyAB > 0);
881 }
882
883 // Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
884
885 return 0;
886 }
887
888
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